Fixed up the formatting of more multi-line comments.

[hengbandforosx/hengbandosx.git] / src / main-cocoa.m

/**
 * \file main-cocoa.m
 * \brief OS X front end
 *
 * Copyright (c) 2011 Peter Ammon
 *
 * This work is free software; you can redistribute it and/or modify it
 * under the terms of either:
 *
 * a) the GNU General Public License as published by the Free Software
 *    Foundation, version 2, or
 *
 * b) the "Angband licence":
 *    This software may be copied and distributed for educational, research,
 *    and not for profit purposes provided that this copyright and statement
 *    are included in all such copies.  Other copyrights may also apply.
 */

#include "angband.h"
/* This is not included in angband.h in Hengband. */
#include "grafmode.h"

#if defined(MACH_O_COCOA)

/* Mac headers */
#import "cocoa/AppDelegate.h"
//#include <Carbon/Carbon.h> /* For keycodes */
/* Hack - keycodes to enable compiling in macOS 10.14 */
#define kVK_Return 0x24
#define kVK_Tab    0x30
#define kVK_Delete 0x33
#define kVK_Escape 0x35
#define kVK_ANSI_KeypadEnter 0x4C

static NSString * const AngbandDirectoryNameLib = @"lib";
static NSString * const AngbandDirectoryNameBase = @VERSION_NAME;

static NSString * const AngbandMessageCatalog = @"Localizable";
static NSString * const AngbandTerminalsDefaultsKey = @"Terminals";
static NSString * const AngbandTerminalRowsDefaultsKey = @"Rows";
static NSString * const AngbandTerminalColumnsDefaultsKey = @"Columns";
static NSString * const AngbandTerminalVisibleDefaultsKey = @"Visible";
static NSString * const AngbandGraphicsDefaultsKey = @"GraphicsID";
static NSString * const AngbandBigTileDefaultsKey = @"UseBigTiles";
static NSString * const AngbandFrameRateDefaultsKey = @"FramesPerSecond";
static NSString * const AngbandSoundDefaultsKey = @"AllowSound";
static NSInteger const AngbandWindowMenuItemTagBase = 1000;
static NSInteger const AngbandCommandMenuItemTagBase = 2000;

/* Global defines etc from Angband 3.5-dev - NRM */
#define ANGBAND_TERM_MAX 8

#define MAX_COLORS 256
#define MSG_MAX SOUND_MAX

/* End Angband stuff - NRM */

/* Application defined event numbers */
enum
{
    AngbandEventWakeup = 1
};

/* Delay handling of pre-emptive "quit" event */
static BOOL quit_when_ready = FALSE;

/* Set to indicate the game is over and we can quit without delay */
static Boolean game_is_finished = FALSE;

/* Our frames per second (e.g. 60). A value of 0 means unthrottled. */
static int frames_per_second;

/* Force a new game or not? */
static bool new_game = FALSE;

@class AngbandView;

#ifdef JP
static wchar_t convert_two_byte_eucjp_to_utf16_native(const char *cp);
#endif

/**
 * Load sound effects based on sound.cfg within the xtra/sound directory;
 * bridge to Cocoa to use NSSound for simple loading and playback, avoiding
 * I/O latency by caching all sounds at the start.  Inherits full sound
 * format support from Quicktime base/plugins.
 * pelpel favoured a plist-based parser for the future but .cfg support
 * improves cross-platform compatibility.
 */
@interface AngbandSoundCatalog : NSObject {
@private
    /**
     * Stores instances of NSSound keyed by path so the same sound can be
     * used for multiple events.
     */
    NSMutableDictionary *soundsByPath;
    /**
     * Stores arrays of NSSound keyed by event number.
     */
    NSMutableDictionary *soundArraysByEvent;
}

/**
 * If NO, then playSound effectively becomes a do nothing operation.
 */
@property (getter=isEnabled) BOOL enabled;

/**
 * Set up for lazy initialization in playSound().  Set enabled to NO.
 */
- (id)init;

/**
 * If self.enabled is YES and the given event has one or more sounds
 * corresponding to it in the catalog, plays one of those sounds, chosen at
 * random.
 */
- (void)playSound:(int)event;

/**
 * Impose an arbitrary limit on the number of possible samples per event.
 * Currently not declaring this as a class property for compatibility with
 * versions of Xcode prior to 8.
 */
+ (int)maxSamples;

/**
 * Return the shared sound catalog instance, creating it if it does not
 * exist yet.  Currently not declaring this as a class property for
 * compatibility with versions of Xcode prior to 8.
 */
+ (AngbandSoundCatalog*)sharedSounds;

/**
 * Release any resources associated with shared sounds.
 */
+ (void)clearSharedSounds;

@end

@implementation AngbandSoundCatalog

- (id)init {
    if (self = [super init]) {
        self->soundsByPath = nil;
        self->soundArraysByEvent = nil;
        self->_enabled = NO;
    }
    return self;
}

- (void)playSound:(int)event {
    if (! self.enabled) {
        return;
    }

    /* Initialize when the first sound is played. */
    if (self->soundArraysByEvent == nil) {
        /* Build the "sound" path */
        char sound_dir[1024];
        path_build(sound_dir, sizeof(sound_dir), ANGBAND_DIR_XTRA, "sound");

        /* Find and open the config file */
        char path[1024];
        path_build(path, sizeof(path), sound_dir, "sound.cfg");
        FILE *fff = my_fopen(path, "r");

        /* Handle errors */
        if (!fff) {
            NSLog(@"The sound configuration file could not be opened.");
            return;
        }

        self->soundsByPath = [[NSMutableDictionary alloc] init];
        self->soundArraysByEvent = [[NSMutableDictionary alloc] init];
        @autoreleasepool {
            /*
             * This loop may take a while depending on the count and size of
             * samples to load.
             */

            /* Parse the file */
            /* Lines are always of the form "name = sample [sample ...]" */
            char buffer[2048];
            while (my_fgets(fff, buffer, sizeof(buffer)) == 0) {
                char *msg_name;
                char *cfg_sample_list;
                char *search;
                char *cur_token;
                char *next_token;
                int event;

                /* Skip anything not beginning with an alphabetic character */
                if (!buffer[0] || !isalpha((unsigned char)buffer[0])) continue;

                /* Split the line into two: message name, and the rest */
                search = strchr(buffer, ' ');
                cfg_sample_list = strchr(search + 1, ' ');
                if (!search) continue;
                if (!cfg_sample_list) continue;

                /* Set the message name, and terminate at first space */
                msg_name = buffer;
                search[0] = '\0';

                /* Make sure this is a valid event name */
                for (event = MSG_MAX - 1; event >= 0; event--) {
                    if (strcmp(msg_name, angband_sound_name[event]) == 0)
                        break;
                }
                if (event < 0) continue;

                /*
                 * Advance the sample list pointer so it's at the beginning of
                 * text.
                 */
                cfg_sample_list++;
                if (!cfg_sample_list[0]) continue;

                /* Terminate the current token */
                cur_token = cfg_sample_list;
                search = strchr(cur_token, ' ');
                if (search) {
                    search[0] = '\0';
                    next_token = search + 1;
                } else {
                    next_token = NULL;
                }

                /*
                 * Now we find all the sample names and add them one by one
                 */
                while (cur_token) {
                    NSMutableArray *soundSamples =
                        [self->soundArraysByEvent
                             objectForKey:[NSNumber numberWithInteger:event]];
                    if (soundSamples == nil) {
                        soundSamples = [[NSMutableArray alloc] init];
                        [self->soundArraysByEvent
                             setObject:soundSamples
                             forKey:[NSNumber numberWithInteger:event]];
                    }
                    int num = (int) soundSamples.count;

                    /* Don't allow too many samples */
                    if (num >= [AngbandSoundCatalog maxSamples]) break;

                    NSString *token_string =
                        [NSString stringWithUTF8String:cur_token];
                    NSSound *sound =
                        [self->soundsByPath objectForKey:token_string];

                    if (! sound) {
                        /*
                         * We have to load the sound. Build the path to the
                         * sample.
                         */
                        path_build(path, sizeof(path), sound_dir, cur_token);
                        struct stat stb;
                        if (stat(path, &stb) == 0) {
                            /* Load the sound into memory */
                            sound = [[NSSound alloc]
                                         initWithContentsOfFile:[NSString stringWithUTF8String:path]
                                         byReference:YES];
                            if (sound) {
                                [self->soundsByPath setObject:sound
                                            forKey:token_string];
                            }
                        }
                    }

                    /* Store it if we loaded it */
                    if (sound) {
                        [soundSamples addObject:sound];
                    }

                    /* Figure out next token */
                    cur_token = next_token;
                    if (next_token) {
                         /* Try to find a space */
                         search = strchr(cur_token, ' ');

                         /*
                          * If we can find one, terminate, and set new "next".
                          */
                         if (search) {
                             search[0] = '\0';
                             next_token = search + 1;
                         } else {
                             /* Otherwise prevent infinite looping */
                             next_token = NULL;
                         }
                    }
                }
            }
        }

        /* Close the file */
        my_fclose(fff);
    }

    @autoreleasepool {
        NSMutableArray *samples =
            [self->soundArraysByEvent
                 objectForKey:[NSNumber numberWithInteger:event]];

        if (samples == nil || samples.count == 0) {
            return;
        }

        /* Choose a random event. */
        int s = randint0((int) samples.count);
        NSSound *sound = samples[s];

        if ([sound isPlaying])
            [sound stop];

        /* Play the sound. */
        [sound play];
    }
}

+ (int)maxSamples {
    return 16;
}

/**
 * For sharedSounds and clearSharedSounds.
 */
static __strong AngbandSoundCatalog* gSharedSounds = nil;

+ (AngbandSoundCatalog*)sharedSounds {
    if (gSharedSounds == nil) {
        gSharedSounds = [[AngbandSoundCatalog alloc] init];
    }
    return gSharedSounds;
}

+ (void)clearSharedSounds {
    gSharedSounds = nil;
}

@end

/**
 * Each location in the terminal either stores a character, a tile,
 * padding for a big tile, or padding for a big character (for example a
 * kanji that takes two columns).  These structures represent that.  Note
 * that tiles do not overlap with each other (excepting the double-height
 * tiles, i.e. from the Shockbolt set; that's handled as a special case).
 * Characters can overlap horizontally:  that is for handling fonts that
 * aren't fixed width.
 */
struct TerminalCellChar {
    wchar_t glyph;
    int attr;
};
struct TerminalCellTile {
    /*
     * These are the coordinates, within the tile set, for the foreground
     * tile and background tile.
     */
    char fgdCol, fgdRow, bckCol, bckRow;
};
struct TerminalCellPadding {
       /*
        * If the cell at (x, y) is padding, the cell at (x - hoff, y - voff)
        * has the attributes affecting the padded region.
        */
    unsigned char hoff, voff;
};
struct TerminalCell {
    union {
        struct TerminalCellChar ch;
        struct TerminalCellTile ti;
        struct TerminalCellPadding pd;
    } v;
    /*
     * Used for big characters or tiles which are hscl x vscl cells.
     * The upper left corner of the big tile or character is marked as
     * TERM_CELL_TILE or TERM_CELL_CHAR.  The remainder are marked as
     * TERM_CELL_TILE_PADDING or TERM_CELL_CHAR_PADDING and have hscl and
     * vscl set to matcn what's in the upper left corner.  Big tiles are
     * tiles scaled up to occupy more space.  Big characters, on the other
     * hand, are characters that naturally take up more space than standard
     * for the font with the assumption that vscl will be one for any big
     * character and hscl will hold the number of columns it occupies (likely
     * just 2, i.e. for Japanese kanji).
     */
    unsigned char hscl;
    unsigned char vscl;
    /*
     * Hold the offsets, as fractions of the tile size expressed as the
     * rational numbers hoff_n / hoff_d and voff_n / voff_d, within the tile
     * or character.  For something that is not a big tile or character, these
     * will be 0, 0, 1, and 1.  For a big tile or character, these will be
     * set when the tile or character is changed to be 0, 0, hscl, and vscl
     * for the upper left corner and i, j, hscl, vscl for the padding element
     * at (i, j) relative to the upper left corner.  For a big tile or
     * character that is partially overwritten, these are not modified in the
     * parts that are not overwritten while hscl, vscl, and, for padding,
     * v.pd.hoff and v.pd.voff are.
     */
    unsigned char hoff_n;
    unsigned char voff_n;
    unsigned char hoff_d;
    unsigned char voff_d;
    /*
     * Is either TERM_CELL_CHAR, TERM_CELL_CHAR_PADDING, TERM_CELL_TILE, or
     * TERM_CELL_TILE_PADDING.
     */
    unsigned char form;
};
#define TERM_CELL_CHAR (0x1)
#define TERM_CELL_CHAR_PADDING (0x2)
#define TERM_CELL_TILE (0x4)
#define TERM_CELL_TILE_PADDING (0x8)

struct TerminalCellBlock {
    int ulcol, ulrow, w, h;
};

struct TerminalCellLocation {
    int col, row;
};

typedef int (*TerminalCellPredicate)(const struct TerminalCell*);

static int isTileTop(const struct TerminalCell *c)
{
    return (c->form == TERM_CELL_TILE ||
            (c->form == TERM_CELL_TILE_PADDING && c->v.pd.voff == 0)) ? 1 : 0;
}

static int isPartiallyOverwrittenBigChar(const struct TerminalCell *c)
{
    if ((c->form & (TERM_CELL_CHAR | TERM_CELL_CHAR_PADDING)) != 0) {
        /*
         * When the tile is set in Term_pict_cocoa, hoff_d is the same as hscl
         * and voff_d is the same as vscl.  hoff_d and voff_d aren't modified
         * after that, but hscl and vscl are in response to partial overwrites.
         * If they're diffent, an overwrite has occurred.
         */
        return ((c->hoff_d > 1 || c->voff_d > 1) &&
                (c->hoff_d != c->hscl || c->voff_d != c->vscl)) ? 1 : 0;
    }
    return 0;
}

static int isCharNoPartial(const struct TerminalCell *c)
{
    return ((c->form & (TERM_CELL_CHAR | TERM_CELL_CHAR_PADDING)) != 0 &&
            ! isPartiallyOverwrittenBigChar(c)) ? 1 : 0;
}

/**
 * Since the drawing is decoupled from Angband's calls to the text_hook,
 * pict_hook, wipe_hook, curs_hook, and bigcurs_hook callbacks of a terminal,
 * maintain a version of the Terminal contents.
 */
@interface TerminalContents : NSObject {
@private
    struct TerminalCell *cells;
}

/**
 * Initialize with zero columns and zero rows.
 */
- (id)init;

/**
 * Initialize with nCol columns and nRow rows.  All elements will be set to
 * blanks.
 */
- (id)initWithColumns:(int)nCol rows:(int)nRow NS_DESIGNATED_INITIALIZER;

/**
 * Resize to be nCol by nRow.  Current contents still within the new bounds
 * are preserved.  Added areas are filled with blanks.
 */
- (void)resizeWithColumns:(int)nCol rows:(int)nRow;

/**
 * Get the contents of a given cell.
 */
- (const struct TerminalCell*)getCellAtColumn:(int)icol row:(int)irow;

/**
 * Scans the row, irow, starting at the column, icol0, and stopping before the
 * column, icol1.  Returns the column index for the first cell that's within
 * the given type mask, tm.  If all of the cells in that range are not within
 * the given type mask, returns icol1.
 */
- (int)scanForTypeMaskInRow:(int)irow mask:(unsigned int)tm col0:(int)icol0
                       col1:(int)icol1;

/**
 * Scans the w x h block whose upper left corner is at (icol, irow).  The
 * scan starts at (icol + pcurs->col, irow + pcurs->row) and proceeds from
 * left to right and top to bottom.  At exit, pcurs will have the location
 * (relative to icol, irow) of the first cell encountered that's within the
 * given type mask, tm.  If no such cell was found, pcurs->col will be w
 * and pcurs->row will be h.
 */
- (void)scanForTypeMaskInBlockAtColumn:(int)icol row:(int)irow width:(int)w
                                height:(int)h mask:(unsigned int)tm
                                cursor:(struct TerminalCellLocation*)pcurs;

/**
 * Scans the row, irow, starting at the column, icol0, and stopping before the
 * column, icol1.  Returns the column index for the first cell that
 * func(cell_address) != rval.  If all of the cells in the range satisfy the
 * predicate, returns icol1.
 */
- (int)scanForPredicateInRow:(int)irow
                   predicate:(TerminalCellPredicate)func
                     desired:(int)rval
                        col0:(int)icol0
                        col1:(int)icol1;

/**
 * Change the contents to have the given string of n characters appear with
 * the leftmost character at (icol, irow).
 */
- (void)setUniformAttributeTextRunAtColumn:(int)icol
                                       row:(int)irow
                                         n:(int)n
                                    glyphs:(const char*)g
                                 attribute:(int)a;

/**
 * Change the contents to have a tile scaled to w x h appear with its upper
 * left corner at (icol, irow).
 */
- (void)setTileAtColumn:(int)icol
                    row:(int)irow
       foregroundColumn:(char)fgdCol
          foregroundRow:(char)fgdRow
       backgroundColumn:(char)bckCol
          backgroundRow:(char)bckRow
              tileWidth:(int)w
             tileHeight:(int)h;

/**
 * Wipe the w x h block whose upper left corner is at (icol, irow).
 */
- (void)wipeBlockAtColumn:(int)icol row:(int)irow width:(int)w height:(int)h;

/**
 * Wipe all the contents.
 */
- (void)wipe;

/**
 * Wipe any tiles.
 */
- (void)wipeTiles;

/**
 * Thie is a helper function for wipeBlockAtColumn.
 */
- (void)wipeBlockAuxAtColumn:(int)icol row:(int)irow width:(int)w
                      height:(int)h;

/**
 * This is a helper function for checkForBigStuffOverwriteAtColumn.
 */
- (void) splitBlockAtColumn:(int)icol row:(int)irow n:(int)nsub
                     blocks:(const struct TerminalCellBlock*)b;

/**
 * This is a helper function for setUniformAttributeTextRunAtColumn,
 * setTileAtColumn, and wipeBlockAtColumn.  If a modification could partially
 * overwrite a big character or tile, make adjustments so what's left can
 * be handled appropriately in rendering.
 */
- (void)checkForBigStuffOverwriteAtColumn:(int)icol row:(int)irow
                                    width:(int)w height:(int)h;

/**
 * Position the upper left corner of the cursor at (icol, irow) and have it
 * encompass w x h cells.
 */
- (void)setCursorAtColumn:(int)icol row:(int)irow width:(int)w height:(int)h;

/**
 * Remove the cursor.  cursorColumn and cursorRow will be -1 until
 * setCursorAtColumn is called.
 */
- (void)removeCursor;

/**
 * Verify that everying is consistent.
 */
- (void)assertInvariants;

/**
 * Is the number of columns.
 */
@property (readonly) int columnCount;

/**
 * Is the number of rows.
 */
@property (readonly) int rowCount;

/**
 * Is the column index for the upper left corner of the cursor.  It will be -1
 * if the cursor is disabled.
 */
@property (readonly) int cursorColumn;

/**
 * Is the row index for the upper left corner of the cursor.  It will be -1
 * if the cursor is disabled.
 */
@property (readonly) int cursorRow;

/**
 * Is the cursor width in number of cells.
 */
@property (readonly) int cursorWidth;

/**
 * Is the cursor height in number of cells.
 */
@property (readonly) int cursorHeight;

/**
 * Return the character to be used for blanks.
 */
+ (wchar_t)getBlankChar;

/**
 * Return the attribute to be used for blanks.
 */
+ (int)getBlankAttribute;

@end

@implementation TerminalContents

- (id)init
{
    return [self initWithColumns:0 rows:0];
}

- (id)initWithColumns:(int)nCol rows:(int)nRow
{
    if (self = [super init]) {
        self->cells = malloc(nCol * nRow * sizeof(struct TerminalCell));
        self->_columnCount = nCol;
        self->_rowCount = nRow;
        self->_cursorColumn = -1;
        self->_cursorRow = -1;
        self->_cursorWidth = 1;
        self->_cursorHeight = 1;
        [self wipe];
    }
    return self;
}

- (void)dealloc
{
    if (self->cells != 0) {
        free(self->cells);
        self->cells = 0;
    }
}

- (void)resizeWithColumns:(int)nCol rows:(int)nRow
{
    /*
     * Potential issue: big tiles or characters can become clipped by the
     * resize.  That will only matter if drawing occurs before the contents
     * are updated by Angband.  Even then, unless the drawing mode is used
     * where AppKit doesn't clip to the window bounds, the only artifact will
     * be clipping when drawn which is acceptable and doesn't require
     * additional logic to either filter out the clipped big stuff here or
     * to just clear it when drawing.
     */
    struct TerminalCell *newCells =
        malloc(nCol * nRow * sizeof(struct TerminalCell));
    struct TerminalCell *cellsOutCursor = newCells;
    const struct TerminalCell *cellsInCursor = self->cells;
    int nColCommon = (nCol < self.columnCount) ? nCol : self.columnCount;
    int nRowCommon = (nRow < self.rowCount) ? nRow : self.rowCount;
    wchar_t blank = [TerminalContents getBlankChar];
    int blank_attr = [TerminalContents getBlankAttribute];
    int i;

    for (i = 0; i < nRowCommon; ++i) {
        (void) memcpy(
            cellsOutCursor,
            cellsInCursor,
            nColCommon * sizeof(struct TerminalCell));
        cellsInCursor += self.columnCount;
        for (int j = nColCommon; j < nCol; ++j) {
            cellsOutCursor[j].v.ch.glyph = blank;
            cellsOutCursor[j].v.ch.attr = blank_attr;
            cellsOutCursor[j].hscl = 1;
            cellsOutCursor[j].vscl = 1;
            cellsOutCursor[j].hoff_n = 0;
            cellsOutCursor[j].voff_n = 0;
            cellsOutCursor[j].hoff_d = 1;
            cellsOutCursor[j].voff_d = 1;
            cellsOutCursor[j].form = TERM_CELL_CHAR;
        }
        cellsOutCursor += nCol;
    }
    while (cellsOutCursor != newCells + nCol * nRow) {
        cellsOutCursor->v.ch.glyph = blank;
        cellsOutCursor->v.ch.attr = blank_attr;
        cellsOutCursor->hscl = 1;
        cellsOutCursor->vscl = 1;
        cellsOutCursor->hoff_n = 0;
        cellsOutCursor->voff_n = 0;
        cellsOutCursor->hoff_d = 1;
        cellsOutCursor->voff_d = 1;
        cellsOutCursor->form = TERM_CELL_CHAR;
        ++cellsOutCursor;
    }

    free(self->cells);
    self->cells = newCells;
    self->_columnCount = nCol;
    self->_rowCount = nRow;
    if (self->_cursorColumn >= nCol || self->_cursorRow >= nRow) {
        self->_cursorColumn = -1;
        self->_cursorRow = -1;
    } else {
        if (self->_cursorColumn + self->_cursorWidth > nCol) {
            self->_cursorWidth = nCol - self->_cursorColumn;
        }
        if (self->_cursorRow + self->_cursorHeight > nRow) {
            self->_cursorHeight = nRow - self->_cursorRow;
        }
    }
}

- (const struct TerminalCell*)getCellAtColumn:(int)icol row:(int)irow
{
    return self->cells + icol + irow * self.columnCount;
}

- (int)scanForTypeMaskInRow:(int)irow mask:(unsigned int)tm col0:(int)icol0
                       col1:(int)icol1
{
    int i = icol0;
    const struct TerminalCell *cellsRow =
        self->cells + irow * self.columnCount;

    while (1) {
        if (i >= icol1) {
            return icol1;
        }
        if ((cellsRow[i].form & tm) != 0) {
            return i;
        }
        ++i;
    }
}

- (void)scanForTypeMaskInBlockAtColumn:(int)icol row:(int)irow width:(int)w
                                height:(int)h mask:(unsigned int)tm
                                cursor:(struct TerminalCellLocation*)pcurs
{
    const struct TerminalCell *cellsRow =
        self->cells + (irow + pcurs->row) * self.columnCount;
    while (1) {
        if (pcurs->col == w) {
            if (pcurs->row >= h - 1) {
                pcurs->row = h;
                return;
            }
            ++pcurs->row;
            pcurs->col = 0;
            cellsRow += self.columnCount;
        }

        if ((cellsRow[icol + pcurs->col].form & tm) != 0) {
            return;
        }

        ++pcurs->col;
    }
}

- (int)scanForPredicateInRow:(int)irow
                   predicate:(TerminalCellPredicate)func
                     desired:(int)rval
                        col0:(int)icol0
                        col1:(int)icol1
{
    int i = icol0;
    const struct TerminalCell *cellsRow =
        self->cells + irow * self.columnCount;

    while (1) {
        if (i >= icol1) {
            return icol1;
        }
        if (func(cellsRow + i) != rval) {
            return i;
        }
        ++i;
    }
}

- (void)setUniformAttributeTextRunAtColumn:(int)icol
                                       row:(int)irow
                                         n:(int)n
                                    glyphs:(const char*)g
                                 attribute:(int)a
{
    [self checkForBigStuffOverwriteAtColumn:icol row:irow width:n height:1];

    struct TerminalCell *cellsRow = self->cells + irow * self.columnCount;
    int i = icol;

    while (i < icol + n) {
#ifdef JP
        if (iskanji(*g)) {
            if (i == n - 1) {
                /*
                 * The second byte of the character is past the end.  Ignore
                 * the character.
                 */
                break;
            }
            cellsRow[i].v.ch.glyph = convert_two_byte_eucjp_to_utf16_native(g);
            cellsRow[i].v.ch.attr = a;
            cellsRow[i].hscl = 2;
            cellsRow[i].vscl = 1;
            cellsRow[i].hoff_n = 0;
            cellsRow[i].voff_n = 0;
            cellsRow[i].hoff_d = 2;
            cellsRow[i].voff_d = 1;
            cellsRow[i].form = TERM_CELL_CHAR;
            ++i;
            cellsRow[i].v.pd.hoff = 1;
            cellsRow[i].v.pd.voff = 0;
            cellsRow[i].hscl = 2;
            cellsRow[i].vscl = 1;
            cellsRow[i].hoff_n = 1;
            cellsRow[i].voff_n = 0;
            cellsRow[i].hoff_d = 2;
            cellsRow[i].voff_d = 1;
            cellsRow[i].form = TERM_CELL_CHAR_PADDING;
            ++i;
            g += 2;
        } else {
            cellsRow[i].v.ch.glyph = *g++;
            cellsRow[i].v.ch.attr = a;
            cellsRow[i].hscl = 1;
            cellsRow[i].vscl = 1;
            cellsRow[i].hoff_n = 0;
            cellsRow[i].voff_n = 0;
            cellsRow[i].hoff_d = 1;
            cellsRow[i].voff_d = 1;
            cellsRow[i].form = TERM_CELL_CHAR;
            ++i;
        }
#else
        cellsRow[i].v.ch.glyph = *g++;
        cellsRow[i].v.ch.attr = a;
        cellsRow[i].hscl = 1;
        cellsRow[i].vscl = 1;
        cellsRow[i].hoff_n = 0;
        cellsRow[i].voff_n = 0;
        cellsRow[i].hoff_d = 1;
        cellsRow[i].voff_d = 1;
        cellsRow[i].form = TERM_CELL_CHAR;
        ++i;
#endif /* JP */
    }
}

- (void)setTileAtColumn:(int)icol
                    row:(int)irow
       foregroundColumn:(char)fgdCol
          foregroundRow:(char)fgdRow
       backgroundColumn:(char)bckCol
          backgroundRow:(char)bckRow
              tileWidth:(int)w
             tileHeight:(int)h
{
    [self checkForBigStuffOverwriteAtColumn:icol row:irow width:w height:h];

    struct TerminalCell *cellsRow = self->cells + irow * self.columnCount;

    cellsRow[icol].v.ti.fgdCol = fgdCol;
    cellsRow[icol].v.ti.fgdRow = fgdRow;
    cellsRow[icol].v.ti.bckCol = bckCol;
    cellsRow[icol].v.ti.bckRow = bckRow;
    cellsRow[icol].hscl = w;
    cellsRow[icol].vscl = h;
    cellsRow[icol].hoff_n = 0;
    cellsRow[icol].voff_n = 0;
    cellsRow[icol].hoff_d = w;
    cellsRow[icol].voff_d = h;
    cellsRow[icol].form = TERM_CELL_TILE;

    int ic;
    for (ic = icol + 1; ic < icol + w; ++ic) {
        cellsRow[ic].v.pd.hoff = ic - icol;
        cellsRow[ic].v.pd.voff = 0;
        cellsRow[ic].hscl = w;
        cellsRow[ic].vscl = h;
        cellsRow[ic].hoff_n = ic - icol;
        cellsRow[ic].voff_n = 0;
        cellsRow[ic].hoff_d = w;
        cellsRow[ic].voff_d = h;
        cellsRow[ic].form = TERM_CELL_TILE_PADDING;
    }
    cellsRow += self.columnCount;
    for (int ir = irow + 1; ir < irow + h; ++ir) {
        for (ic = icol; ic < icol + w; ++ic) {
            cellsRow[ic].v.pd.hoff = ic - icol;
            cellsRow[ic].v.pd.voff = ir - irow;
            cellsRow[ic].hscl = w;
            cellsRow[ic].vscl = h;
            cellsRow[ic].hoff_n = ic - icol;
            cellsRow[ic].voff_n = ir - irow;
            cellsRow[ic].hoff_d = w;
            cellsRow[ic].voff_d = h;
            cellsRow[ic].form = TERM_CELL_TILE_PADDING;
        }
        cellsRow += self.columnCount;
    }
}

- (void)wipeBlockAtColumn:(int)icol row:(int)irow width:(int)w height:(int)h
{
    [self checkForBigStuffOverwriteAtColumn:icol row:irow width:w height:h];
    [self wipeBlockAuxAtColumn:icol row:irow width:w height:h];
}

- (void)wipe
{
    wchar_t blank = [TerminalContents getBlankChar];
    int blank_attr = [TerminalContents getBlankAttribute];
    struct TerminalCell *cellCursor = self->cells +
        self.columnCount * self.rowCount;

    while (cellCursor != self->cells) {
        --cellCursor;
        cellCursor->v.ch.glyph = blank;
        cellCursor->v.ch.attr = blank_attr;
        cellCursor->hscl = 1;
        cellCursor->vscl = 1;
        cellCursor->hoff_n = 0;
        cellCursor->voff_n = 0;
        cellCursor->hoff_d = 1;
        cellCursor->voff_d = 1;
        cellCursor->form = TERM_CELL_CHAR;
    }
}

- (void)wipeTiles
{
    wchar_t blank = [TerminalContents getBlankChar];
    int blank_attr = [TerminalContents getBlankAttribute];
    struct TerminalCell *cellCursor = self->cells +
        self.columnCount * self.rowCount;

    while (cellCursor != self->cells) {
        --cellCursor;
        if ((cellCursor->form &
             (TERM_CELL_TILE | TERM_CELL_TILE_PADDING)) != 0) {
            cellCursor->v.ch.glyph = blank;
            cellCursor->v.ch.attr = blank_attr;
            cellCursor->hscl = 1;
            cellCursor->vscl = 1;
            cellCursor->hoff_n = 0;
            cellCursor->voff_n = 0;
            cellCursor->hoff_d = 1;
            cellCursor->voff_d = 1;
            cellCursor->form = TERM_CELL_CHAR;
        }
    }
}

- (void)wipeBlockAuxAtColumn:(int)icol row:(int)irow width:(int)w
                      height:(int)h
{
    struct TerminalCell *cellsRow = self->cells + irow * self.columnCount;
    wchar_t blank = [TerminalContents getBlankChar];
    int blank_attr = [TerminalContents getBlankAttribute];

    for (int ir = irow; ir < irow + h; ++ir) {
        for (int ic = icol; ic < icol + w; ++ic) {
            cellsRow[ic].v.ch.glyph = blank;
            cellsRow[ic].v.ch.attr = blank_attr;
            cellsRow[ic].hscl = 1;
            cellsRow[ic].vscl = 1;
            cellsRow[ic].hoff_n = 0;
            cellsRow[ic].voff_n = 0;
            cellsRow[ic].hoff_d = 1;
            cellsRow[ic].voff_d = 1;
            cellsRow[ic].form = TERM_CELL_CHAR;
        }
        cellsRow += self.columnCount;
    }
}

- (void) splitBlockAtColumn:(int)icol row:(int)irow n:(int)nsub
                     blocks:(const struct TerminalCellBlock*)b
{
    const struct TerminalCell *pulold = [self getCellAtColumn:icol row:irow];

    for (int isub = 0; isub < nsub; ++isub) {
        struct TerminalCell* cellsRow =
            self->cells + b[isub].ulrow * self.columnCount;

        /*
         * Copy the data from the upper left corner of the big block to
         * the upper left corner of the piece.
         */
        if (b[isub].ulcol != icol || b[isub].ulrow != irow) {
            if (pulold->form == TERM_CELL_CHAR) {
                cellsRow[b[isub].ulcol].v.ch = pulold->v.ch;
                cellsRow[b[isub].ulcol].form = TERM_CELL_CHAR;
            } else {
                cellsRow[b[isub].ulcol].v.ti = pulold->v.ti;
                cellsRow[b[isub].ulcol].form = TERM_CELL_TILE;
            }
        }
        cellsRow[b[isub].ulcol].hscl = b[isub].w;
        cellsRow[b[isub].ulcol].vscl = b[isub].h;

        /*
         * Point the padding elements in the piece to the new upper left
         * corner.
         */
        int ic;
        for (ic = b[isub].ulcol + 1; ic < b[isub].ulcol + b[isub].w; ++ic) {
            cellsRow[ic].v.pd.hoff = ic - b[isub].ulcol;
            cellsRow[ic].v.pd.voff = 0;
            cellsRow[ic].hscl = b[isub].w;
            cellsRow[ic].vscl = b[isub].h;
        }
        cellsRow += self.columnCount;
        for (int ir = b[isub].ulrow + 1;
             ir < b[isub].ulrow + b[isub].h;
             ++ir) {
            for (ic = b[isub].ulcol; ic < b[isub].ulcol + b[isub].w; ++ic) {
                cellsRow[ic].v.pd.hoff = ic - b[isub].ulcol;
                cellsRow[ic].v.pd.voff = ir - b[isub].ulrow;
                cellsRow[ic].hscl = b[isub].w;
                cellsRow[ic].vscl = b[isub].h;
            }
            cellsRow += self.columnCount;
        }
    }
}

- (void)checkForBigStuffOverwriteAtColumn:(int)icol row:(int)irow
                                    width:(int)w height:(int)h
{
    int ire = irow + h, ice = icol + w;

    for (int ir = irow; ir < ire; ++ir) {
        for (int ic = icol; ic < ice; ++ic) {
            const struct TerminalCell *pcell =
                [self getCellAtColumn:ic row:ir];

            if ((pcell->form & (TERM_CELL_CHAR | TERM_CELL_TILE)) != 0 &&
                (pcell->hscl > 1 || pcell->vscl > 1)) {
                /*
                 * Lost chunk including upper left corner.  Split into at most
                 * two new blocks.
                 */
                /*
                 * Tolerate blocks that were clipped by a resize at some point.
                 */
                int wb = (ic + pcell->hscl <= self.columnCount) ?
                    pcell->hscl : self.columnCount - ic;
                int hb = (ir + pcell->vscl <= self.rowCount) ?
                    pcell->vscl : self.rowCount - ir;
                struct TerminalCellBlock blocks[2];
                int nsub = 0, ww, hw;

                if (ice < ic + wb) {
                    /* Have something to the right not overwritten. */
                    blocks[nsub].ulcol = ice;
                    blocks[nsub].ulrow = ir;
                    blocks[nsub].w = ic + wb - ice;
                    blocks[nsub].h = (ire < ir + hb) ? ire - ir : hb;
                    ++nsub;
                    ww = ice - ic;
                } else {
                    ww = wb;
                }
                if (ire < ir + hb) {
                    /* Have something below not overwritten. */
                    blocks[nsub].ulcol = ic;
                    blocks[nsub].ulrow = ire;
                    blocks[nsub].w = wb;
                    blocks[nsub].h = ir + hb - ire;
                    ++nsub;
                    hw = ire - ir;
                } else {
                    hw = hb;
                }
                if (nsub > 0) {
                    [self splitBlockAtColumn:ic row:ir n:nsub blocks:blocks];
                }
                /*
                 * Wipe the part of the block that's destined to be overwritten
                 * so it doesn't receive further consideration in this loop.
                 * For efficiency, would like to have the loop skip over it or
                 * fill it with the desired content, but this is easier to
                 * implement.
                 */
                [self wipeBlockAuxAtColumn:ic row:ir width:ww height:hw];
            } else if ((pcell->form & (TERM_CELL_CHAR_PADDING |
                                       TERM_CELL_TILE_PADDING)) != 0) {
                /*
                 * Lost a chunk that doesn't cover the upper left corner.  In
                 * general will split into up to four new blocks (one above,
                 * one to the left, one to the right, and one below).
                 */
                int pcol = ic - pcell->v.pd.hoff;
                int prow = ir - pcell->v.pd.voff;
                const struct TerminalCell *pcell2 =
                    [self getCellAtColumn:pcol row:prow];

                /*
                 * Tolerate blocks that were clipped by a resize at some point.
                 */
                int wb = (pcol + pcell2->hscl <= self.columnCount) ?
                    pcell2->hscl : self.columnCount - pcol;
                int hb = (prow + pcell2->vscl <= self.rowCount) ?
                    pcell2->vscl : self.rowCount - prow;
                struct TerminalCellBlock blocks[4];
                int nsub = 0, ww, hw;

                if (prow < ir) {
                    /* Have something above not overwritten. */
                    blocks[nsub].ulcol = pcol;
                    blocks[nsub].ulrow = prow;
                    blocks[nsub].w = wb;
                    blocks[nsub].h = ir - prow;
                    ++nsub;
                }
                if (pcol < ic) {
                    /* Have something to the left not overwritten. */
                    blocks[nsub].ulcol = pcol;
                    blocks[nsub].ulrow = ir;
                    blocks[nsub].w = ic - pcol;
                    blocks[nsub].h =
                        (ire < prow + hb) ? ire - ir : prow + hb - ir;
                    ++nsub;
                }
                if (ice < pcol + wb) {
                    /* Have something to the right not overwritten. */
                    blocks[nsub].ulcol = ice;
                    blocks[nsub].ulrow = ir;
                    blocks[nsub].w = pcol + wb - ice;
                    blocks[nsub].h =
                        (ire < prow + hb) ? ire - ir : prow + hb - ir;
                    ++nsub;
                    ww = ice - ic;
                } else {
                    ww = pcol + wb - ic;
                }
                if (ire < prow + hb) {
                    /* Have something below not overwritten. */
                    blocks[nsub].ulcol = pcol;
                    blocks[nsub].ulrow = ire;
                    blocks[nsub].w = wb;
                    blocks[nsub].h = prow + hb - ire;
                    ++nsub;
                    hw = ire - ir;
                } else {
                    hw = prow + hb - ir;
                }

                [self splitBlockAtColumn:pcol row:prow n:nsub blocks:blocks];
                /* Same rationale for wiping as above. */
                [self wipeBlockAuxAtColumn:ic row:ir width:ww height:hw];
            }
        }
    }
}

- (void)setCursorAtColumn:(int)icol row:(int)irow width:(int)w height:(int)h
{
    self->_cursorColumn = icol;
    self->_cursorRow = irow;
    self->_cursorWidth = w;
    self->_cursorHeight = h;
}

- (void)removeCursor
{
    self->_cursorColumn = -1;
    self->_cursorHeight = -1;
    self->_cursorWidth = 1;
    self->_cursorHeight = 1;
}

- (void)assertInvariants
{
    const struct TerminalCell *cellsRow = self->cells;

    /*
     * The comments with the definition for TerminalCell define the
     * relationships of hoff_n, voff_n, hoff_d, voff_d, hscl, and vscl
     * asserted here.
     */
    for (int ir = 0; ir < self.rowCount; ++ir) {
        for (int ic = 0; ic < self.columnCount; ++ic) {
            switch (cellsRow[ic].form) {
            case TERM_CELL_CHAR:
                assert(cellsRow[ic].hscl > 0 && cellsRow[ic].vscl > 0);
                assert(cellsRow[ic].hoff_n < cellsRow[ic].hoff_d &&
                       cellsRow[ic].voff_n < cellsRow[ic].voff_d);
                if (cellsRow[ic].hscl == cellsRow[ic].hoff_d) {
                    assert(cellsRow[ic].hoff_n == 0);
                }
                if (cellsRow[ic].vscl == cellsRow[ic].voff_d) {
                    assert(cellsRow[ic].voff_n == 0);
                }
                /*
                 * Verify that the padding elements have the correct tag
                 * and point back to this cell.
                 */
                if (cellsRow[ic].hscl > 1 || cellsRow[ic].vscl > 1) {
                    const struct TerminalCell *cellsRow2 = cellsRow;

                    for (int ir2 = ir; ir2 < ir + cellsRow[ic].vscl; ++ir2) {
                        for (int ic2 = ic;
                             ic2 < ic + cellsRow[ic].hscl;
                             ++ic2) {
                            if (ir2 == ir && ic2 == ic) {
                                continue;
                            }
                            assert(cellsRow2[ic2].form ==
                                   TERM_CELL_CHAR_PADDING);
                            assert(ic2 - cellsRow2[ic2].v.pd.hoff == ic &&
                                   ir2 - cellsRow2[ic2].v.pd.voff == ir);
                        }
                        cellsRow2 += self.columnCount;
                    }
                }
                break;

            case TERM_CELL_TILE:
                assert(cellsRow[ic].hscl > 0 && cellsRow[ic].vscl > 0);
                assert(cellsRow[ic].hoff_n < cellsRow[ic].hoff_d &&
                       cellsRow[ic].voff_n < cellsRow[ic].voff_d);
                if (cellsRow[ic].hscl == cellsRow[ic].hoff_d) {
                    assert(cellsRow[ic].hoff_n == 0);
                }
                if (cellsRow[ic].vscl == cellsRow[ic].voff_d) {
                    assert(cellsRow[ic].voff_n == 0);
                }
                /*
                 * Verify that the padding elements have the correct tag
                 * and point back to this cell.
                 */
                if (cellsRow[ic].hscl > 1 || cellsRow[ic].vscl > 1) {
                    const struct TerminalCell *cellsRow2 = cellsRow;

                    for (int ir2 = ir; ir2 < ir + cellsRow[ic].vscl; ++ir2) {
                        for (int ic2 = ic;
                             ic2 < ic + cellsRow[ic].hscl;
                             ++ic2) {
                            if (ir2 == ir && ic2 == ic) {
                                continue;
                            }
                            assert(cellsRow2[ic2].form ==
                                   TERM_CELL_TILE_PADDING);
                            assert(ic2 - cellsRow2[ic2].v.pd.hoff == ic &&
                                   ir2 - cellsRow2[ic2].v.pd.voff == ir);
                        }
                        cellsRow2 += self.columnCount;
                    }
                }
                break;

            case TERM_CELL_CHAR_PADDING:
                assert(cellsRow[ic].hscl > 0 && cellsRow[ic].vscl > 0);
                assert(cellsRow[ic].hoff_n < cellsRow[ic].hoff_d &&
                       cellsRow[ic].voff_n < cellsRow[ic].voff_d);
                assert(cellsRow[ic].hoff_n > 0 || cellsRow[ic].voff_n > 0);
                if (cellsRow[ic].hscl == cellsRow[ic].hoff_d) {
                    assert(cellsRow[ic].hoff_n == cellsRow[ic].v.pd.hoff);
                }
                if (cellsRow[ic].vscl == cellsRow[ic].voff_d) {
                    assert(cellsRow[ic].voff_n == cellsRow[ic].v.pd.voff);
                }
                assert(ic >= cellsRow[ic].v.pd.hoff &&
                       ir >= cellsRow[ic].v.pd.voff);
                /*
                 * Verify that it's padding for something that can point
                 * back to it.
                 */
                {
                    const struct TerminalCell *parent =
                        [self getCellAtColumn:(ic - cellsRow[ic].v.pd.hoff)
                              row:(ir - cellsRow[ic].v.pd.voff)];

                    assert(parent->form == TERM_CELL_CHAR);
                    assert(parent->hscl > cellsRow[ic].v.pd.hoff &&
                           parent->vscl > cellsRow[ic].v.pd.voff);
                    assert(parent->hscl == cellsRow[ic].hscl &&
                           parent->vscl == cellsRow[ic].vscl);
                    assert(parent->hoff_d == cellsRow[ic].hoff_d &&
                           parent->voff_d == cellsRow[ic].voff_d);
                }
                break;

            case TERM_CELL_TILE_PADDING:
                assert(cellsRow[ic].hscl > 0 && cellsRow[ic].vscl > 0);
                assert(cellsRow[ic].hoff_n < cellsRow[ic].hoff_d &&
                       cellsRow[ic].voff_n < cellsRow[ic].voff_d);
                assert(cellsRow[ic].hoff_n > 0 || cellsRow[ic].voff_n > 0);
                if (cellsRow[ic].hscl == cellsRow[ic].hoff_d) {
                    assert(cellsRow[ic].hoff_n == cellsRow[ic].v.pd.hoff);
                }
                if (cellsRow[ic].vscl == cellsRow[ic].voff_d) {
                    assert(cellsRow[ic].voff_n == cellsRow[ic].v.pd.voff);
                }
                assert(ic >= cellsRow[ic].v.pd.hoff &&
                       ir >= cellsRow[ic].v.pd.voff);
                /*
                 * Verify that it's padding for something that can point
                 * back to it.
                 */
                {
                    const struct TerminalCell *parent =
                        [self getCellAtColumn:(ic - cellsRow[ic].v.pd.hoff)
                              row:(ir - cellsRow[ic].v.pd.voff)];

                    assert(parent->form == TERM_CELL_TILE);
                    assert(parent->hscl > cellsRow[ic].v.pd.hoff &&
                           parent->vscl > cellsRow[ic].v.pd.voff);
                    assert(parent->hscl == cellsRow[ic].hscl &&
                           parent->vscl == cellsRow[ic].vscl);
                    assert(parent->hoff_d == cellsRow[ic].hoff_d &&
                           parent->voff_d == cellsRow[ic].voff_d);
                }
                break;

            default:
                assert(0);
            }
        }
        cellsRow += self.columnCount;
    }
}

+ (wchar_t)getBlankChar
{
    return L' ';
}

+ (int)getBlankAttribute
{
    return 0;
}

@end

/**
 * TerminalChanges is used to track changes made via the text_hook, pict_hook,
 * wipe_hook, curs_hook, and bigcurs_hook callbacks on the terminal since the
 * last call to xtra_hook for TERM_XTRA_FRESH.  The locations marked as changed
 * can then be used to make bounding rectangles for the regions that need to
 * be redisplayed.
 */
@interface TerminalChanges : NSObject {
    int* colBounds;
    /*
     * Outside of firstChangedRow, lastChangedRow and what's in colBounds, the
     * contents of this are handled lazily.
     */
    BOOL* marks;
}

/**
 * Initialize with zero columns and zero rows.
 */
- (id)init;

/**
 * Initialize with nCol columns and nRow rows.  No changes will be marked.
 */
- (id)initWithColumns:(int)nCol rows:(int)nRow NS_DESIGNATED_INITIALIZER;

/**
 * Resize to be nCol by nRow.  Current contents still within the new bounds
 * are preserved.  Added areas are marked as unchanged.
 */
- (void)resizeWithColumns:(int)nCol rows:(int)nRow;

/**
 * Clears all marked changes.
 */
- (void)clear;

- (BOOL)isChangedAtColumn:(int)icol row:(int)irow;

/**
 * Scans the row, irow, starting at the column, icol0, and stopping before the
 * column, icol1.  Returns the column index for the first cell that is
 * changed.  The returned index will be equal to icol1 if all of the cells in
 * the range are unchanged.
 */
- (int)scanForChangedInRow:(int)irow col0:(int)icol0 col1:(int)icol1;

/**
 * Scans the row, irow, starting at the column, icol0, and stopping before the
 * column, icol1.  returns the column index for the first cell that has not
 * changed.  The returned index will be equal to icol1 if all of the cells in
 * the range have changed.
 */
- (int)scanForUnchangedInRow:(int)irow col0:(int)icol0 col1:(int)icol1;

- (void)markChangedAtColumn:(int)icol row:(int)irow;

- (void)markChangedRangeAtColumn:(int)icol row:(int)irow width:(int)w;

/**
 * Marks the block as changed who's upper left hand corner is at (icol, irow).
 */
- (void)markChangedBlockAtColumn:(int)icol
                             row:(int)irow
                           width:(int)w
                          height:(int)h;

/**
 * Returns the index of the first changed column in the given row.  That index
 * will be equal to the number of columns if there are no changes in the row.
 */
- (int)getFirstChangedColumnInRow:(int)irow;

/**
 * Returns the index of the last changed column in the given row.  That index
 * will be equal to -1 if there are no changes in the row.
 */
- (int)getLastChangedColumnInRow:(int)irow;

/**
 * Is the number of columns.
 */
@property (readonly) int columnCount;

/**
 * Is the number of rows.
 */
@property (readonly) int rowCount;

/**
 * Is the index of the first row with changes.  Will be equal to the number
 * of rows if there are no changes.
 */
@property (readonly) int firstChangedRow;

/**
 * Is the index of the last row with changes.  Will be equal to -1 if there
 * are no changes.
 */
@property (readonly) int lastChangedRow;

@end

@implementation TerminalChanges

- (id)init
{
    return [self initWithColumns:0 rows:0];
}

- (id)initWithColumns:(int)nCol rows:(int)nRow
{
    if (self = [super init]) {
        self->colBounds = malloc(2 * nRow * sizeof(int));
        self->marks = malloc(nCol * nRow * sizeof(BOOL));
        self->_columnCount = nCol;
        self->_rowCount = nRow;
        [self clear];
    }
    return self;
}

- (void)dealloc
{
    if (self->marks != 0) {
        free(self->marks);
        self->marks = 0;
    }
    if (self->colBounds != 0) {
        free(self->colBounds);
        self->colBounds = 0;
    }
}

- (void)resizeWithColumns:(int)nCol rows:(int)nRow
{
    int* newColBounds = malloc(2 * nRow * sizeof(int));
    BOOL* newMarks = malloc(nCol * nRow * sizeof(BOOL));
    int nRowCommon = (nRow < self.rowCount) ? nRow : self.rowCount;

    if (self.firstChangedRow <= self.lastChangedRow &&
        self.firstChangedRow < nRowCommon) {
        BOOL* marksOutCursor = newMarks + self.firstChangedRow * nCol;
        const BOOL* marksInCursor =
            self->marks + self.firstChangedRow * self.columnCount;
        int nColCommon = (nCol < self.columnCount) ? nCol : self.columnCount;

        if (self.lastChangedRow >= nRowCommon) {
            self->_lastChangedRow = nRowCommon - 1;
        }
        for (int i = self.firstChangedRow; i <= self.lastChangedRow; ++i) {
            if (self->colBounds[i + i] < nColCommon) {
                newColBounds[i + i] = self->colBounds[i + i];
                newColBounds[i + i + 1] =
                    (self->colBounds[i + i + 1] < nColCommon) ?
                    self->colBounds[i + i + 1] : nColCommon - 1;
                (void) memcpy(
                    marksOutCursor + self->colBounds[i + i],
                    marksInCursor + self->colBounds[i + i],
                    (newColBounds[i + i + 1] - newColBounds[i + i] + 1) *
                        sizeof(BOOL));
                marksInCursor += self.columnCount;
                marksOutCursor += nCol;
            } else {
                self->colBounds[i + i] = nCol;
                self->colBounds[i + i + 1] = -1;
            }
        }
    } else {
        self->_firstChangedRow = nRow;
        self->_lastChangedRow = -1;
    }

    free(self->colBounds);
    self->colBounds = newColBounds;
    free(self->marks);
    self->marks = newMarks;
    self->_columnCount = nCol;
    self->_rowCount = nRow;
}

- (void)clear
{
    self->_firstChangedRow = self.rowCount;
    self->_lastChangedRow = -1;
}

- (BOOL)isChangedAtColumn:(int)icol row:(int)irow
{
    if (irow < self.firstChangedRow || irow > self.lastChangedRow) {
        return NO;
    }
    if (icol < self->colBounds[irow + irow] ||
        icol > self->colBounds[irow + irow + 1]) {
        return NO;
    }
    return self->marks[icol + irow * self.columnCount];
}

- (int)scanForChangedInRow:(int)irow col0:(int)icol0 col1:(int)icol1
{
    if (irow < self.firstChangedRow || irow > self.lastChangedRow ||
        icol0 > self->colBounds[irow + irow + 1]) {
        return icol1;
    }

    int i = (icol0 > self->colBounds[irow + irow]) ?
        icol0 : self->colBounds[irow + irow];
    int i1 = (icol1 <= self->colBounds[irow + irow + 1]) ?
        icol1 : self->colBounds[irow + irow + 1] + 1;
    const BOOL* marksCursor = self->marks + irow * self.columnCount;
    while (1) {
        if (i >= i1) {
            return icol1;
        }
        if (marksCursor[i]) {
            return i;
        }
        ++i;
    }
}

- (int)scanForUnchangedInRow:(int)irow col0:(int)icol0 col1:(int)icol1
{
    if (irow < self.firstChangedRow || irow > self.lastChangedRow ||
        icol0 < self->colBounds[irow + irow] ||
        icol0 > self->colBounds[irow + irow + 1]) {
        return icol0;
    }

    int i = icol0;
    int i1 = (icol1 <= self->colBounds[irow + irow + 1]) ?
        icol1 : self->colBounds[irow + irow + 1] + 1;
    const BOOL* marksCursor = self->marks + irow * self.columnCount;
    while (1) {
        if (i >= i1 || ! marksCursor[i]) {
            return i;
        }
        ++i;
    }
}

- (void)markChangedAtColumn:(int)icol row:(int)irow
{
    [self markChangedBlockAtColumn:icol row:irow width:1 height:1];
}

- (void)markChangedRangeAtColumn:(int)icol row:(int)irow width:(int)w
{
    [self markChangedBlockAtColumn:icol row:irow width:w height:1];
}

- (void)markChangedBlockAtColumn:(int)icol
                             row:(int)irow
                           width:(int)w
                          height:(int)h
{
    if (irow + h <= self.firstChangedRow) {
        /* All prior marked regions are on rows after the requested block. */
        if (self.firstChangedRow > self.lastChangedRow) {
            self->_lastChangedRow = irow + h - 1;
        } else {
            for (int i = irow + h; i < self.firstChangedRow; ++i) {
                self->colBounds[i + i] = self.columnCount;
                self->colBounds[i + i + 1] = -1;
            }
        }
        self->_firstChangedRow = irow;

        BOOL* marksCursor = self->marks + irow * self.columnCount;
        for (int i = irow; i < irow + h; ++i) {
            self->colBounds[i + i] = icol;
            self->colBounds[i + i + 1] = icol + w - 1;
            for (int j = icol; j < icol + w; ++j) {
                marksCursor[j] = YES;
            }
            marksCursor += self.columnCount;
        }
    } else if (irow > self.lastChangedRow) {
        /* All prior marked regions are on rows before the requested block. */
        int i;

        for (i = self.lastChangedRow + 1; i < irow; ++i) {
            self->colBounds[i + i] = self.columnCount;
            self->colBounds[i + i + 1] = -1;
        }
        self->_lastChangedRow = irow + h - 1;

        BOOL* marksCursor = self->marks + irow * self.columnCount;
        for (i = irow; i < irow + h; ++i) {
            self->colBounds[i + i] = icol;
            self->colBounds[i + i + 1] = icol + w - 1;
            for (int j = icol; j < icol + w; ++j) {
                marksCursor[j] = YES;
            }
            marksCursor += self.columnCount;
        }
    } else {
        /*
         * There's overlap between the rows of the requested block and prior
         * marked regions.
         */
        BOOL* marksCursor = self->marks + irow * self.columnCount;
        int irow0, h0;

        if (irow < self.firstChangedRow) {
            /* Handle any leading rows where there's no overlap. */
            for (int i = irow; i < self.firstChangedRow; ++i) {
                self->colBounds[i + i] = icol;
                self->colBounds[i + i + 1] = icol + w - 1;
                for (int j = icol; j < icol + w; ++j) {
                    marksCursor[j] = YES;
                }
                marksCursor += self.columnCount;
            }
            irow0 = self.firstChangedRow;
            h0 = irow + h - self.firstChangedRow;
            self->_firstChangedRow = irow;
        } else {
            irow0 = irow;
            h0 = h;
        }

        /* Handle potentially overlapping rows */
        if (irow0 + h0 > self.lastChangedRow + 1) {
            h0 = self.lastChangedRow + 1 - irow0;
            self->_lastChangedRow = irow + h - 1;
        }

        int i;
        for (i = irow0; i < irow0 + h0; ++i) {
            if (icol + w <= self->colBounds[i + i]) {
                int j;

                for (j = icol; j < icol + w; ++j) {
                    marksCursor[j] = YES;
                }
                if (self->colBounds[i + i] > self->colBounds[i + i + 1]) {
                    self->colBounds[i + i + 1] = icol + w - 1;
                } else {
                    for (j = icol + w; j < self->colBounds[i + i]; ++j) {
                        marksCursor[j] = NO;
                    }
                }
                self->colBounds[i + i] = icol;
            } else if (icol > self->colBounds[i + i + 1]) {
                int j;

                for (j = self->colBounds[i + i + 1] + 1; j < icol; ++j) {
                    marksCursor[j] = NO;
                }
                for (j = icol; j < icol + w; ++j) {
                    marksCursor[j] = YES;
                }
                self->colBounds[i + i + 1] = icol + w - 1;
            } else {
                if (icol < self->colBounds[i + i]) {
                    self->colBounds[i + i] = icol;
                }
                if (icol + w > self->colBounds[i + i + 1]) {
                    self->colBounds[i + i + 1] = icol + w - 1;
                }
                for (int j = icol; j < icol + w; ++j) {
                    marksCursor[j] = YES;
                }
            }
            marksCursor += self.columnCount;
        }

        /* Handle any trailing rows where there's no overlap. */
        for (i = irow0 + h0; i < irow + h; ++i) {
            self->colBounds[i + i] = icol;
            self->colBounds[i + i + 1] = icol + w - 1;
            for (int j = icol; j < icol + w; ++j) {
                marksCursor[j] = YES;
            }
            marksCursor += self.columnCount;
        }
    }
}

- (int)getFirstChangedColumnInRow:(int)irow
{
    if (irow < self.firstChangedRow || irow > self.lastChangedRow) {
        return self.columnCount;
    }
    return self->colBounds[irow + irow];
}

- (int)getLastChangedColumnInRow:(int)irow
{
    if (irow < self.firstChangedRow || irow > self.lastChangedRow) {
        return -1;
    }
    return self->colBounds[irow + irow + 1];
}

@end


/**
 * Draws one tile as a helper function for AngbandContext's drawRect.
 */
static void draw_image_tile(
    NSGraphicsContext* nsContext,
    CGContextRef cgContext,
    CGImageRef image,
    NSRect srcRect,
    NSRect dstRect,
    NSCompositingOperation op)
{
    /* Flip the source rect since the source image is flipped */
    CGAffineTransform flip = CGAffineTransformIdentity;
    flip = CGAffineTransformTranslate(flip, 0.0, CGImageGetHeight(image));
    flip = CGAffineTransformScale(flip, 1.0, -1.0);
    CGRect flippedSourceRect =
        CGRectApplyAffineTransform(NSRectToCGRect(srcRect), flip);

    /*
     * When we use high-quality resampling to draw a tile, pixels from outside
     * the tile may bleed in, causing graphics artifacts. Work around that.
     */
    CGImageRef subimage =
        CGImageCreateWithImageInRect(image, flippedSourceRect);
    [nsContext setCompositingOperation:op];
    CGContextDrawImage(cgContext, NSRectToCGRect(dstRect), subimage);
    CGImageRelease(subimage);
}


/*
 * The max number of glyphs we support.  Currently this only affects
 * updateGlyphInfo() for the calculation of the tile size, fontAscender,
 * fontDescender, nColPre, and nColPost.  The rendering in drawWChar() will
 * work for a glyph not in updateGlyphInfo()'s set, and that is used for
 * rendering Japanese characters, though there may be clipping or clearing
 * artifacts because it wasn't included in updateGlyphInfo()'s calculations.
 */
#define GLYPH_COUNT 256

/*
 * An AngbandContext represents a logical Term (i.e. what Angband thinks is
 * a window).
 */
@interface AngbandContext : NSObject <NSWindowDelegate>
{
@public

    /* The Angband term */
    term *terminal;

@private
    /* Is the last time we drew, so we can throttle drawing. */
    CFAbsoluteTime lastRefreshTime;

    /* Flags whether or not a fullscreen transition is in progress. */
    BOOL inFullscreenTransition;

    /* Our view */
    AngbandView *angbandView;
}

/* Column and row counts, by default 80 x 24 */
@property (readonly) int cols;
@property (readonly) int rows;

/* The size of the border between the window edge and the contents */
@property (readonly) NSSize borderSize;

/* The font of this context */
@property NSFont *angbandViewFont;

/* The size of one tile */
@property (readonly) NSSize tileSize;

/* Font's ascender and descender */
@property (readonly) CGFloat fontAscender;
@property (readonly) CGFloat fontDescender;

/*
 * These are the number of columns before or after, respectively, a text
 * change that may need to be redrawn.
 */
@property (readonly) int nColPre;
@property (readonly) int nColPost;

/* If this context owns a window, here it is. */
@property NSWindow *primaryWindow;

/* Holds our version of the contents of the terminal. */
@property TerminalContents *contents;

/*
 * Marks which locations have been changed by the text_hook, pict_hook,
 * wipe_hook, curs_hook, and bigcurs_hhok callbacks on the terminal since
 * the last call to xtra_hook with TERM_XTRA_FRESH.
 */
@property TerminalChanges *changes;

@property (nonatomic, assign) BOOL hasSubwindowFlags;
@property (nonatomic, assign) BOOL windowVisibilityChecked;

- (void)resizeWithColumns:(int)nCol rows:(int)nRow;

/**
 * Based on what has been marked as changed, inform AppKit of the bounding
 * rectangles for the changed areas.
 */
- (void)computeInvalidRects;

- (void)drawRect:(NSRect)rect inView:(NSView *)view;

/* Called at initialization to set the term */
- (void)setTerm:(term *)t;

/* Called when the context is going down. */
- (void)dispose;

/*
 * Return the rect in view coordinates for the block of cells whose upper
 * left corner is (x,y).
 */
- (NSRect)viewRectForCellBlockAtX:(int)x y:(int)y width:(int)w height:(int)h;

/* Draw the given wide character into the given tile rect. */
- (void)drawWChar:(wchar_t)wchar inRect:(NSRect)tile screenFont:(NSFont*)font
          context:(CGContextRef)ctx;

/*
 * Returns the primary window for this angband context, creating it if
 * necessary
 */
- (NSWindow *)makePrimaryWindow;

/* Handle becoming the main window */
- (void)windowDidBecomeMain:(NSNotification *)notification;

/* Return whether the context's primary window is ordered in or not */
- (BOOL)isOrderedIn;

/*
 * Return whether the context's primary window is the main window.
 * Since the terminals other than terminal 0 are configured as panels in
 * Hengband, this will only be true for terminal 0.
 */
- (BOOL)isMainWindow;

/*
 * Return whether the context's primary window is the destination for key
 * input.
 */
- (BOOL)isKeyWindow;

/* Invalidate the whole image */
- (void)setNeedsDisplay:(BOOL)val;

/* Invalidate part of the image, with the rect expressed in view coordinates */
- (void)setNeedsDisplayInRect:(NSRect)rect;

/* Display (flush) our Angband views */
- (void)displayIfNeeded;

/*
 * Resize context to size of contentRect, and optionally save size to
 * defaults
 */
- (void)resizeTerminalWithContentRect: (NSRect)contentRect saveToDefaults: (BOOL)saveToDefaults;

/*
 * Change the minimum size and size increments for the window associated with
 * the context.  termIdx is the index for the terminal:  pass it so this
 * function can be used when self->terminal has not yet been set.
 */
- (void)constrainWindowSize:(int)termIdx;

- (void)saveWindowVisibleToDefaults: (BOOL)windowVisible;
- (BOOL)windowVisibleUsingDefaults;

/* Class methods */
/**
 * Gets the default font for all contexts.  Currently not declaring this as
 * a class property for compatibility with versions of Xcode prior to 8.
 */
+ (NSFont*)defaultFont;
/**
 * Sets the default font for all contexts.
 */
+ (void)setDefaultFont:(NSFont*)font;

/* Internal methods */
/* Set the title for the primary window. */
- (void)setDefaultTitle:(int)termIdx;

@end

/**
 * Generate a mask for the subwindow flags. The mask is just a safety check to
 * make sure that our windows show and hide as expected.  This function allows
 * for future changes to the set of flags without needed to update it here
 * (unless the underlying types change).
 */
u32b AngbandMaskForValidSubwindowFlags(void)
{
    int windowFlagBits = sizeof(*(window_flag)) * CHAR_BIT;
    int maxBits = MIN( 16, windowFlagBits );
    u32b mask = 0;

    for( int i = 0; i < maxBits; i++ )
    {
        if( window_flag_desc[i] != NULL )
        {
            mask |= (1 << i);
        }
    }

    return mask;
}

/**
 * Check for changes in the subwindow flags and update window visibility.
 * This seems to be called for every user event, so we don't
 * want to do any unnecessary hiding or showing of windows.
 */
static void AngbandUpdateWindowVisibility(void)
{
    /*
     * Because this function is called frequently, we'll make the mask static.
     * It doesn't change between calls, as the flags themselves are hardcoded
     */
    static u32b validWindowFlagsMask = 0;

    if( validWindowFlagsMask == 0 )
    {
        validWindowFlagsMask = AngbandMaskForValidSubwindowFlags();
    }

    /*
     * Loop through all of the subwindows and see if there is a change in the
     * flags. If so, show or hide the corresponding window. We don't care about
     * the flags themselves; we just want to know if any are set.
     */
    for( int i = 1; i < ANGBAND_TERM_MAX; i++ )
    {
        AngbandContext *angbandContext =
            (__bridge AngbandContext*) (angband_term[i]->data);

        if( angbandContext == nil )
        {
            continue;
        }

        /*
         * This horrible mess of flags is so that we can try to maintain some
         * user visibility preference. This should allow the user a window and
         * have it stay closed between application launches. However, this
         * means that when a subwindow is turned on, it will no longer appear
         * automatically. Angband has no concept of user control over window
         * visibility, other than the subwindow flags.
         */
        if( !angbandContext.windowVisibilityChecked )
        {
            if( [angbandContext windowVisibleUsingDefaults] )
            {
                [angbandContext.primaryWindow orderFront: nil];
                angbandContext.windowVisibilityChecked = YES;
            }
            else
            {
                [angbandContext.primaryWindow close];
                angbandContext.windowVisibilityChecked = NO;
            }
        }
        else
        {
            BOOL termHasSubwindowFlags = ((window_flag[i] & validWindowFlagsMask) > 0);

            if( angbandContext.hasSubwindowFlags && !termHasSubwindowFlags )
            {
                [angbandContext.primaryWindow close];
                angbandContext.hasSubwindowFlags = NO;
                [angbandContext saveWindowVisibleToDefaults: NO];
            }
            else if( !angbandContext.hasSubwindowFlags && termHasSubwindowFlags )
            {
                [angbandContext.primaryWindow orderFront: nil];
                angbandContext.hasSubwindowFlags = YES;
                [angbandContext saveWindowVisibleToDefaults: YES];
            }
        }
    }

    /* Make the main window key so that user events go to the right spot */
    AngbandContext *mainWindow =
        (__bridge AngbandContext*) (angband_term[0]->data);
    [mainWindow.primaryWindow makeKeyAndOrderFront: nil];
}

/**
 * ------------------------------------------------------------------------
 * Graphics support
 * ------------------------------------------------------------------------ */

/**
 * The tile image
 */
static CGImageRef pict_image;

/**
 * Numbers of rows and columns in a tileset,
 * calculated by the PICT/PNG loading code
 */
static int pict_cols = 0;
static int pict_rows = 0;

/**
 * Requested graphics mode (as a grafID).
 * The current mode is stored in current_graphics_mode.
 */
static int graf_mode_req = 0;

/**
 * Helper function to check the various ways that graphics can be enabled,
 * guarding against NULL
 */
static BOOL graphics_are_enabled(void)
{
    return current_graphics_mode
        && current_graphics_mode->grafID != GRAPHICS_NONE;
}

/**
 * Like graphics_are_enabled(), but test the requested graphics mode.
 */
static BOOL graphics_will_be_enabled(void)
{
    if (graf_mode_req == GRAPHICS_NONE) {
        return NO;
    }

    graphics_mode *new_mode = get_graphics_mode(graf_mode_req);
    return new_mode && new_mode->grafID != GRAPHICS_NONE;
}

/**
 * Hack -- game in progress
 */
static Boolean game_in_progress = FALSE;


#pragma mark Prototypes
static BOOL redraw_for_tiles_or_term0_font(void);
static void wakeup_event_loop(void);
static void hook_plog(const char *str);
static void hook_quit(const char * str);
static NSString* get_lib_directory(void);
static NSString* get_doc_directory(void);
static NSString* AngbandCorrectedDirectoryPath(NSString *originalPath);
static void prepare_paths_and_directories(void);
static void load_prefs(void);
static void init_windows(void);
static void handle_open_when_ready(void);
static void play_sound(int event);
static BOOL check_events(int wait);
static BOOL send_event(NSEvent *event);
static void set_color_for_index(int idx);
static void record_current_savefile(void);

/**
 * Available values for 'wait'
 */
#define CHECK_EVENTS_DRAIN -1
#define CHECK_EVENTS_NO_WAIT    0
#define CHECK_EVENTS_WAIT 1


/**
 * Note when "open"/"new" become valid
 */
static bool initialized = FALSE;

/* Methods for getting the appropriate NSUserDefaults */
@interface NSUserDefaults (AngbandDefaults)
+ (NSUserDefaults *)angbandDefaults;
@end

@implementation NSUserDefaults (AngbandDefaults)
+ (NSUserDefaults *)angbandDefaults
{
    return [NSUserDefaults standardUserDefaults];
}
@end

/*
 * Methods for pulling images out of the Angband bundle (which may be separate
 * from the current bundle in the case of a screensaver
 */
@interface NSImage (AngbandImages)
+ (NSImage *)angbandImage:(NSString *)name;
@end

/* The NSView subclass that draws our Angband image */
@interface AngbandView : NSView {
@private
    NSBitmapImageRep *cacheForResize;
    NSRect cacheBounds;
}

@property (nonatomic, weak) AngbandContext *angbandContext;

@end

@implementation NSImage (AngbandImages)

/*
 * Returns an image in the resource directoy of the bundle containing the
 * Angband view class.
 */
+ (NSImage *)angbandImage:(NSString *)name
{
    NSBundle *bundle = [NSBundle bundleForClass:[AngbandView class]];
    NSString *path = [bundle pathForImageResource:name];
    return (path) ? [[NSImage alloc] initByReferencingFile:path] : nil;
}

@end


@implementation AngbandContext

- (NSSize)baseSize
{
    /*
     * We round the base size down. If we round it up, I believe we may end up
     * with pixels that nobody "owns" that may accumulate garbage. In general
     * rounding down is harmless, because any lost pixels may be sopped up by
     * the border.
     */
    return NSMakeSize(
        floor(self.cols * self.tileSize.width + 2 * self.borderSize.width),
        floor(self.rows * self.tileSize.height + 2 * self.borderSize.height));
}

/* qsort-compatible compare function for CGSizes */
static int compare_advances(const void *ap, const void *bp)
{
    const CGSize *a = ap, *b = bp;
    return (a->width > b->width) - (a->width < b->width);
}

/**
 * Precompute certain metrics (tileSize, fontAscender, fontDescender, nColPre,
 * and nColPost) for the current font.
 */
- (void)updateGlyphInfo
{
    NSFont *screenFont = [self.angbandViewFont screenFont];

    /* Generate a string containing each MacRoman character */
    /*
     * Here and below, dynamically allocate working arrays rather than put them
     * on the stack in case limited stack space is an issue.
     */
    unsigned char *latinString = malloc(GLYPH_COUNT);
    if (latinString == 0) {
        NSException *exc = [NSException exceptionWithName:@"OutOfMemory"
                                        reason:@"latinString in updateGlyphInfo"
                                        userInfo:nil];
        @throw exc;
    }
    size_t i;
    for (i=0; i < GLYPH_COUNT; i++) latinString[i] = (unsigned char)i;

    /* Turn that into unichar. Angband uses ISO Latin 1. */
    NSString *allCharsString = [[NSString alloc] initWithBytes:latinString
        length:GLYPH_COUNT encoding:NSISOLatin1StringEncoding];
    unichar *unicharString = malloc(GLYPH_COUNT * sizeof(unichar));
    if (unicharString == 0) {
        free(latinString);
        NSException *exc = [NSException exceptionWithName:@"OutOfMemory"
                                        reason:@"unicharString in updateGlyphInfo"
                                        userInfo:nil];
        @throw exc;
    }
    unicharString[0] = 0;
    [allCharsString getCharacters:unicharString range:NSMakeRange(0, MIN(GLYPH_COUNT, [allCharsString length]))];
    allCharsString = nil;
    free(latinString);

    /* Get glyphs */
    CGGlyph *glyphArray = calloc(GLYPH_COUNT, sizeof(CGGlyph));
    if (glyphArray == 0) {
        free(unicharString);
        NSException *exc = [NSException exceptionWithName:@"OutOfMemory"
                                        reason:@"glyphArray in updateGlyphInfo"
                                        userInfo:nil];
        @throw exc;
    }
    CTFontGetGlyphsForCharacters((CTFontRef)screenFont, unicharString,
                                 glyphArray, GLYPH_COUNT);
    free(unicharString);

    /* Get advances. Record the max advance. */
    CGSize *advances = malloc(GLYPH_COUNT * sizeof(CGSize));
    if (advances == 0) {
        free(glyphArray);
        NSException *exc = [NSException exceptionWithName:@"OutOfMemory"
                                        reason:@"advances in updateGlyphInfo"
                                        userInfo:nil];
        @throw exc;
    }
    CTFontGetAdvancesForGlyphs(
        (CTFontRef)screenFont, kCTFontHorizontalOrientation, glyphArray,
        advances, GLYPH_COUNT);
    CGFloat *glyphWidths = malloc(GLYPH_COUNT * sizeof(CGFloat));
    if (glyphWidths == 0) {
        free(glyphArray);
        free(advances);
        NSException *exc = [NSException exceptionWithName:@"OutOfMemory"
                                        reason:@"glyphWidths in updateGlyphInfo"
                                        userInfo:nil];
        @throw exc;
    }
    for (i=0; i < GLYPH_COUNT; i++) {
        glyphWidths[i] = advances[i].width;
    }

    /*
     * For good non-mono-font support, use the median advance. Start by sorting
     * all advances.
     */
    qsort(advances, GLYPH_COUNT, sizeof *advances, compare_advances);

    /* Skip over any initially empty run */
    size_t startIdx;
    for (startIdx = 0; startIdx < GLYPH_COUNT; startIdx++)
    {
        if (advances[startIdx].width > 0) break;
    }

    /* Pick the center to find the median */
    CGFloat medianAdvance = 0;
    /* In case we have all zero advances for some reason */
    if (startIdx < GLYPH_COUNT)
    {
        medianAdvance = advances[(startIdx + GLYPH_COUNT)/2].width;
    }

    free(advances);

    /*
     * Record the ascender and descender.  Some fonts, for instance DIN
     * Condensed and Rockwell in 10.14, the ascent on '@' exceeds that
     * reported by [screenFont ascender].  Get the overall bounding box
     * for the glyphs and use that instead of the ascender and descender
     * values if the bounding box result extends farther from the baseline.
     */
    CGRect bounds = CTFontGetBoundingRectsForGlyphs(
        (CTFontRef) screenFont, kCTFontHorizontalOrientation, glyphArray,
        NULL, GLYPH_COUNT);
    self->_fontAscender = [screenFont ascender];
    if (self->_fontAscender < bounds.origin.y + bounds.size.height) {
        self->_fontAscender = bounds.origin.y + bounds.size.height;
    }
    self->_fontDescender = [screenFont descender];
    if (self->_fontDescender > bounds.origin.y) {
        self->_fontDescender = bounds.origin.y;
    }

    /*
     * Record the tile size.  Round both values up to have tile boundaries
     * match pixel boundaries.
     */
    self->_tileSize.width = ceil(medianAdvance);
    self->_tileSize.height = ceil(self.fontAscender - self.fontDescender);

    /*
     * Determine whether neighboring columns need to be redrawn when a
     * character changes.
     */
    CGRect *boxes = malloc(GLYPH_COUNT * sizeof(CGRect));
    if (boxes == 0) {
        free(glyphWidths);
        free(glyphArray);
        NSException *exc = [NSException exceptionWithName:@"OutOfMemory"
                                        reason:@"boxes in updateGlyphInfo"
                                        userInfo:nil];
        @throw exc;
    }
    CGFloat beyond_right = 0.;
    CGFloat beyond_left = 0.;
    CTFontGetBoundingRectsForGlyphs(
        (CTFontRef)screenFont,
        kCTFontHorizontalOrientation,
        glyphArray,
        boxes,
        GLYPH_COUNT);
    for (i = 0; i < GLYPH_COUNT; i++) {
        /* Account for the compression and offset used by drawWChar(). */
        CGFloat compression, offset;
        CGFloat v;

        if (glyphWidths[i] <= self.tileSize.width) {
            compression = 1.;
            offset = 0.5 * (self.tileSize.width - glyphWidths[i]);
        } else {
            compression = self.tileSize.width / glyphWidths[i];
            offset = 0.;
        }
        v = (offset + boxes[i].origin.x) * compression;
        if (beyond_left > v) {
            beyond_left = v;
        }
        v = (offset + boxes[i].origin.x + boxes[i].size.width) * compression;
        if (beyond_right < v) {
            beyond_right = v;
        }
    }
    free(boxes);
    self->_nColPre = ceil(-beyond_left / self.tileSize.width);
    if (beyond_right > self.tileSize.width) {
        self->_nColPost =
            ceil((beyond_right - self.tileSize.width) / self.tileSize.width);
    } else {
        self->_nColPost = 0;
    }

    free(glyphWidths);
    free(glyphArray);
}


- (void)requestRedraw
{
    if (! self->terminal) return;
    
    term *old = Term;
    
    /* Activate the term */
    Term_activate(self->terminal);
    
    /* Redraw the contents */
    Term_redraw();
    
    /* Flush the output */
    Term_fresh();
    
    /* Restore the old term */
    Term_activate(old);
}

- (void)setTerm:(term *)t
{
    self->terminal = t;
}

/**
 * If we're trying to limit ourselves to a certain number of frames per second,
 * then compute how long it's been since we last drew, and then wait until the
 * next frame has passed. */
- (void)throttle
{
    if (frames_per_second > 0)
    {
        CFAbsoluteTime now = CFAbsoluteTimeGetCurrent();
        CFTimeInterval timeSinceLastRefresh = now - self->lastRefreshTime;
        CFTimeInterval timeUntilNextRefresh = (1. / (double)frames_per_second) - timeSinceLastRefresh;
        
        if (timeUntilNextRefresh > 0)
        {
            usleep((unsigned long)(timeUntilNextRefresh * 1000000.));
        }
    }
    self->lastRefreshTime = CFAbsoluteTimeGetCurrent();
}

- (void)drawWChar:(wchar_t)wchar inRect:(NSRect)tile screenFont:(NSFont*)font
          context:(CGContextRef)ctx
{
    CGFloat tileOffsetY = self.fontAscender;
    CGFloat tileOffsetX = 0.0;
    UniChar unicharString[2] = {(UniChar)wchar, 0};

    /* Get glyph and advance */
    CGGlyph thisGlyphArray[1] = { 0 };
    CGSize advances[1] = { { 0, 0 } };
    CTFontGetGlyphsForCharacters(
        (CTFontRef)font, unicharString, thisGlyphArray, 1);
    CGGlyph glyph = thisGlyphArray[0];
    CTFontGetAdvancesForGlyphs(
        (CTFontRef)font, kCTFontHorizontalOrientation, thisGlyphArray,
        advances, 1);
    CGSize advance = advances[0];

    /*
     * If our font is not monospaced, our tile width is deliberately not big
     * enough for every character. In that event, if our glyph is too wide, we
     * need to compress it horizontally. Compute the compression ratio.
     * 1.0 means no compression.
     */
    double compressionRatio;
    if (advance.width <= NSWidth(tile))
    {
        /* Our glyph fits, so we can just draw it, possibly with an offset */
        compressionRatio = 1.0;
        tileOffsetX = (NSWidth(tile) - advance.width)/2;
    }
    else
    {
        /* Our glyph doesn't fit, so we'll have to compress it */
        compressionRatio = NSWidth(tile) / advance.width;
        tileOffsetX = 0;
    }

    /* Now draw it */
    CGAffineTransform textMatrix = CGContextGetTextMatrix(ctx);
    CGFloat savedA = textMatrix.a;

    /* Set the position */
    textMatrix.tx = tile.origin.x + tileOffsetX;
    textMatrix.ty = tile.origin.y + tileOffsetY;

    /* Maybe squish it horizontally. */
    if (compressionRatio != 1.)
    {
        textMatrix.a *= compressionRatio;
    }

    CGContextSetTextMatrix(ctx, textMatrix);
    CGContextShowGlyphsAtPositions(ctx, &glyph, &CGPointZero, 1);

    /* Restore the text matrix if we messed with the compression ratio */
    if (compressionRatio != 1.)
    {
        textMatrix.a = savedA;
    }

    CGContextSetTextMatrix(ctx, textMatrix);
}

- (NSRect)viewRectForCellBlockAtX:(int)x y:(int)y width:(int)w height:(int)h
{
    return NSMakeRect(
        x * self.tileSize.width + self.borderSize.width,
        y * self.tileSize.height + self.borderSize.height,
        w * self.tileSize.width, h * self.tileSize.height);
}

- (void)setSelectionFont:(NSFont*)font adjustTerminal: (BOOL)adjustTerminal
{
    /* Record the new font */
    self.angbandViewFont = font;

    /* Update our glyph info */
    [self updateGlyphInfo];

    if( adjustTerminal )
    {
        /*
         * Adjust terminal to fit window with new font; save the new columns
         * and rows since they could be changed
         */
        NSRect contentRect =
            [self.primaryWindow
                 contentRectForFrameRect: [self.primaryWindow frame]];

        [self constrainWindowSize:[self terminalIndex]];
        NSSize size = self.primaryWindow.contentMinSize;
        BOOL windowNeedsResizing = NO;
        if (contentRect.size.width < size.width) {
            contentRect.size.width = size.width;
            windowNeedsResizing = YES;
        }
        if (contentRect.size.height < size.height) {
            contentRect.size.height = size.height;
            windowNeedsResizing = YES;
        }
        if (windowNeedsResizing) {
            size.width = contentRect.size.width;
            size.height = contentRect.size.height;
            [self.primaryWindow setContentSize:size];
        }
        [self resizeTerminalWithContentRect: contentRect saveToDefaults: YES];
    }
}

- (id)init
{
    if ((self = [super init]))
    {
        /* Default rows and cols */
        self->_cols = 80;
        self->_rows = 24;

        /* Default border size */
        self->_borderSize = NSMakeSize(2, 2);

        self->_nColPre = 0;
        self->_nColPost = 0;

        self->_contents =
            [[TerminalContents alloc] initWithColumns:self->_cols
                                      rows:self->_rows];
        self->_changes =
            [[TerminalChanges alloc] initWithColumns:self->_cols
                                     rows:self->_rows];
        self->lastRefreshTime = CFAbsoluteTimeGetCurrent();
        self->inFullscreenTransition = NO;

        self->_windowVisibilityChecked = NO;
    }
    return self;
}

/**
 * Destroy all the receiver's stuff. This is intended to be callable more than
 * once.
 */
- (void)dispose
{
    self->terminal = NULL;

    /* Disassociate ourselves from our view. */
    [self->angbandView setAngbandContext:nil];
    self->angbandView = nil;

    /* Font */
    self.angbandViewFont = nil;

    /* Window */
    [self.primaryWindow setDelegate:nil];
    [self.primaryWindow close];
    self.primaryWindow = nil;

    /* Contents and pending changes */
    self.contents = nil;
    self.changes = nil;
}

/* Usual Cocoa fare */
- (void)dealloc
{
    [self dispose];
}

- (void)resizeWithColumns:(int)nCol rows:(int)nRow
{
    [self.contents resizeWithColumns:nCol rows:nRow];
    [self.changes resizeWithColumns:nCol rows:nRow];
    self->_cols = nCol;
    self->_rows = nRow;
}

/**
 * For defaultFont and setDefaultFont.
 */
static __strong NSFont* gDefaultFont = nil;

+ (NSFont*)defaultFont
{
    return gDefaultFont;
}

+ (void)setDefaultFont:(NSFont*)font
{
    gDefaultFont = font;
}

- (void)setDefaultTitle:(int)termIdx
{
    NSMutableString *title =
        [NSMutableString stringWithCString:angband_term_name[termIdx]
#ifdef JP
                         encoding:NSJapaneseEUCStringEncoding
#else
                         encoding:NSMacOSRomanStringEncoding
#endif
        ];
    [title appendFormat:@" %dx%d", self.cols, self.rows];
    [[self makePrimaryWindow] setTitle:title];
}

- (NSWindow *)makePrimaryWindow
{
    if (! self.primaryWindow)
    {
        /*
         * This has to be done after the font is set, which it already is in
         * term_init_cocoa()
         */
        NSSize sz = self.baseSize;
        NSRect contentRect = NSMakeRect( 0.0, 0.0, sz.width, sz.height );

        NSUInteger styleMask = NSTitledWindowMask | NSResizableWindowMask | NSMiniaturizableWindowMask;

        /*
         * Make every window other than the main window closable, also create
         * them as utility panels to get the thinner title bar and other
         * attributes that already match up with how those windows are used.
         */
        if ((__bridge AngbandContext*) (angband_term[0]->data) != self)
        {
            NSPanel *panel =
                [[NSPanel alloc] initWithContentRect:contentRect
                                 styleMask:(styleMask | NSClosableWindowMask |
                                            NSUtilityWindowMask)
                                 backing:NSBackingStoreBuffered defer:YES];

            panel.floatingPanel = NO;
            self.primaryWindow = panel;
        } else {
            self.primaryWindow =
                [[NSWindow alloc] initWithContentRect:contentRect
                                  styleMask:styleMask
                                  backing:NSBackingStoreBuffered defer:YES];
        }

        /* Not to be released when closed */
        [self.primaryWindow setReleasedWhenClosed:NO];
        [self.primaryWindow setExcludedFromWindowsMenu: YES]; /* we're using custom window menu handling */

        /* Make the view */
        self->angbandView = [[AngbandView alloc] initWithFrame:contentRect];
        [angbandView setAngbandContext:self];
        [angbandView setNeedsDisplay:YES];
        [self.primaryWindow setContentView:angbandView];

        /* We are its delegate */
        [self.primaryWindow setDelegate:self];
    }
    return self.primaryWindow;
}


- (void)computeInvalidRects
{
    for (int irow = self.changes.firstChangedRow;
         irow <= self.changes.lastChangedRow;
         ++irow) {
        int icol = [self.changes scanForChangedInRow:irow
                        col0:0 col1:self.cols];

        while (icol < self.cols) {
            /* Find the end of the changed region. */
            int jcol =
                [self.changes scanForUnchangedInRow:irow col0:(icol + 1)
                     col1:self.cols];

            /*
             * If the last column is a character, extend the region drawn
             * because characters can exceed the horizontal bounds of the cell
             * and those parts will need to be cleared.  Don't extend into a
             * tile because the clipping is set while drawing to never
             * extend text into a tile.  For a big character that's been
             * partially overwritten, allow what comes after the point
             * where the overwrite occurred to influence the stuff before
             * but not vice versa.  If extending the region reaches another
             * changed block, find the end of that block and repeat the
             * process.
             */
            /*
             * A value of zero means checking for a character immediately
             * prior to the column, isrch.  A value of one means checking for
             * something past the end that could either influence the changed
             * region (within nColPre of it and no intervening tile) or be
             * influenced by it (within nColPost of it and no intervening
             * tile or partially overwritten big character).  A value of two
             * means checking for something past the end which is both changed
             * and could affect the part of the unchanged region that has to
             * be redrawn because it is affected by the prior changed region
             * Values of three and four are like one and two, respectively,
             * but indicate that a partially overwritten big character was
             * found.
             */
            int stage = 0;
            int isrch = jcol;
            int irng0 = jcol;
            int irng1 = jcol;
            while (1) {
                if (stage == 0) {
                    const struct TerminalCell *pcell =
                        [self.contents getCellAtColumn:(isrch - 1) row:irow];
                    if ((pcell->form &
                         (TERM_CELL_TILE | TERM_CELL_TILE_PADDING)) != 0) {
                        break;
                    } else {
                        irng0 = isrch + self.nColPre;
                        if (irng0 > self.cols) {
                            irng0 = self.cols;
                        }
                        irng1 = isrch + self.nColPost;
                        if (irng1 > self.cols) {
                            irng1 = self.cols;
                        }
                        if (isrch < irng0 || isrch < irng1) {
                            stage = isPartiallyOverwrittenBigChar(pcell) ?
                                3 : 1;
                        } else {
                            break;
                        }
                    }
                }

                if (stage == 1) {
                    const struct TerminalCell *pcell =
                        [self.contents getCellAtColumn:isrch row:irow];

                    if ((pcell->form &
                         (TERM_CELL_TILE | TERM_CELL_TILE_PADDING)) != 0) {
                        /*
                         * Check if still in the region that could be
                         * influenced by the changed region.  If so,
                         * everything up to the tile will be redrawn anyways
                         * so combine the regions if the tile has changed
                         * as well.  Otherwise, terminate the search since
                         * the tile doesn't allow influence to propagate
                         * through it and don't want to affect what's in the
                         * tile.
                         */
                        if (isrch < irng1) {
                            if ([self.changes isChangedAtColumn:isrch
                                     row:irow]) {
                                jcol = [self.changes scanForUnchangedInRow:irow
                                            col0:(isrch + 1) col1:self.cols];
                                if (jcol < self.cols) {
                                    stage = 0;
                                    isrch = jcol;
                                    continue;
                                }
                            }
                        }
                        break;
                    } else {
                        /*
                         * With a changed character, combine the regions (if
                         * still in the region affected by the changed region
                         * am going to redraw everything up to this new region
                         * anyway; if only in the region that can affect the
                         * changed region, this changed text could influence
                         * the current changed region).
                         */
                        if ([self.changes isChangedAtColumn:isrch row:irow]) {
                            jcol = [self.changes scanForUnchangedInRow:irow
                                        col0:(isrch + 1) col1:self.cols];
                            if (jcol < self.cols) {
                                stage = 0;
                                isrch = jcol;
                                continue;
                            }
                            break;
                        }

                        if (isrch < irng1) {
                            /*
                             * Can be affected by the changed region so
                             * has to be redrawn.
                             */
                            ++jcol;
                        }
                        ++isrch;
                        if (isrch >= irng1) {
                            irng0 = jcol + self.nColPre;
                            if (irng0 > self.cols) {
                                irng0 = self.cols;
                            }
                            if (isrch >= irng0) {
                                break;
                            }
                            stage = isPartiallyOverwrittenBigChar(pcell) ?
                                4 : 2;
                        } else if (isPartiallyOverwrittenBigChar(pcell)) {
                            stage = 3;
                        }
                    }
                }

                if (stage == 2) {
                    /*
                     * Looking for a later changed region that could influence
                     * the region that has to be redrawn.  The region that has
                     * to be redrawn ends just before jcol.
                     */
                    const struct TerminalCell *pcell =
                        [self.contents getCellAtColumn:isrch row:irow];

                    if ((pcell->form &
                         (TERM_CELL_TILE | TERM_CELL_TILE_PADDING)) != 0) {
                        /* Can not spread influence through a tile. */
                        break;
                    }
                    if ([self.changes isChangedAtColumn:isrch row:irow]) {
                        /*
                         * Found one.  Combine with the one ending just before
                         * jcol.
                         */
                        jcol = [self.changes scanForUnchangedInRow:irow
                                    col0:(isrch + 1) col1:self.cols];
                        if (jcol < self.cols) {
                            stage = 0;
                            isrch = jcol;
                            continue;
                        }
                        break;
                    }

                    ++isrch;
                    if (isrch >= irng0) {
                        break;
                    }
                    if (isPartiallyOverwrittenBigChar(pcell)) {
                        stage = 4;
                    }
                }

                if (stage == 3) {
                    const struct TerminalCell *pcell =
                        [self.contents getCellAtColumn:isrch row:irow];

                    /*
                     * Have encountered a partially overwritten big character
                     * but still may be in the region that could be influenced
                     * by the changed region.  That influence can not extend
                     * past the past the padding for the partially overwritten
                     * character.
                     */
                    if ((pcell->form & (TERM_CELL_CHAR | TERM_CELL_TILE |
                                        TERM_CELL_TILE_PADDING)) != 0) {
                        if (isrch < irng1) {
                            /*
                             * Still can be affected by the changed region
                             * so everything up to isrch will be redrawn
                             * anyways.  If this location has changed,
                             * merge the changed regions.
                             */
                            if ([self.changes isChangedAtColumn:isrch
                                     row:irow]) {
                                jcol = [self.changes scanForUnchangedInRow:irow
                                            col0:(isrch + 1) col1:self.cols];
                                if (jcol < self.cols) {
                                    stage = 0;
                                    isrch = jcol;
                                    continue;
                                }
                                break;
                            }
                        }
                        if ((pcell->form &
                             (TERM_CELL_TILE | TERM_CELL_TILE_PADDING)) != 0) {
                            /*
                             * It's a tile.  That blocks influence in either
                             * direction.
                             */
                            break;
                        }

                        /*
                         * The partially overwritten big character was
                         * overwritten by a character.  Check to see if it
                         * can either influence the unchanged region that
                         * has to redrawn or the changed region prior to
                         * that.
                         */
                        if (isrch >= irng0) {
                            break;
                        }
                        stage = 4;
                    } else {
                        if (isrch < irng1) {
                            /*
                             * Can be affected by the changed region so has to
                             * be redrawn.
                             */
                            ++jcol;
                        }
                        ++isrch;
                        if (isrch >= irng1) {
                            irng0 = jcol + self.nColPre;
                            if (irng0 > self.cols) {
                                irng0 = self.cols;
                            }
                            if (isrch >= irng0) {
                                break;
                            }
                            stage = 4;
                        }
                    }
                }

                if (stage == 4) {
                    /*
                     * Have already encountered a partially overwritten big
                     * character.  Looking for a later changed region that
                     * could influence the region that has to be redrawn
                     * The region that has to be redrawn ends just before jcol.
                     */
                    const struct TerminalCell *pcell =
                        [self.contents getCellAtColumn:isrch row:irow];

                    if ((pcell->form &
                         (TERM_CELL_TILE | TERM_CELL_TILE_PADDING)) != 0) {
                        /* Can not spread influence through a tile. */
                        break;
                    }
                    if (pcell->form == TERM_CELL_CHAR) {
                        if ([self.changes isChangedAtColumn:isrch row:irow]) {
                            /*
                             * Found a changed region.  Combine with the one
                             * ending just before jcol.
                             */
                            jcol = [self.changes scanForUnchangedInRow:irow
                                        col0:(isrch + 1) col1:self.cols];
                            if (jcol < self.cols) {
                                stage = 0;
                                isrch = jcol;
                                continue;
                            }
                            break;
                        }
                    }
                    ++isrch;
                    if (isrch >= irng0) {
                        break;
                    }
                }
            }

            /*
             * Check to see if there's characters before the changed region
             * that would have to be redrawn because it's influenced by the
             * changed region.  Do not have to check for merging with a prior
             * region because of the screening already done.
             */
            if (self.nColPre > 0 &&
                ([self.contents getCellAtColumn:icol row:irow]->form &
                 (TERM_CELL_CHAR | TERM_CELL_CHAR_PADDING)) != 0) {
                int irng = icol - self.nColPre;

                if (irng < 0) {
                    irng = 0;
                }
                while (icol > irng &&
                       ([self.contents getCellAtColumn:(icol - 1)
                             row:irow]->form &
                        (TERM_CELL_CHAR | TERM_CELL_CHAR_PADDING)) != 0) {
                    --icol;
                }
            }

            NSRect r = [self viewRectForCellBlockAtX:icol y:irow
                             width:(jcol - icol) height:1];
            [self setNeedsDisplayInRect:r];

            icol = [self.changes scanForChangedInRow:irow col0:jcol
                        col1:self.cols];
        }
    }
}


#pragma mark View/Window Passthrough

/*
 * This is a qsort-compatible compare function for NSRect, to get them in
 * ascending order by y origin.
 */
static int compare_nsrect_yorigin_greater(const void *ap, const void *bp)
{
    const NSRect *arp = ap;
    const NSRect *brp = bp;
    return (arp->origin.y > brp->origin.y) - (arp->origin.y < brp->origin.y);
}

/**
 * This is a helper function for drawRect.
 */
- (void)renderTileRunInRow:(int)irow col0:(int)icol0 col1:(int)icol1
                     nsctx:(NSGraphicsContext*)nsctx ctx:(CGContextRef)ctx
                 grafWidth:(int)graf_width grafHeight:(int)graf_height
               overdrawRow:(int)overdraw_row overdrawMax:(int)overdraw_max
{
    /* Save the compositing mode since it is modified below. */
    NSCompositingOperation op = nsctx.compositingOperation;

    while (icol0 < icol1) {
        const struct TerminalCell *pcell =
            [self.contents getCellAtColumn:icol0 row:irow];
        NSRect destinationRect =
            [self viewRectForCellBlockAtX:icol0 y:irow
                  width:pcell->hscl height:pcell->vscl];
        NSRect fgdRect = NSMakeRect(
            graf_width * (pcell->v.ti.fgdCol +
                          pcell->hoff_n / (1.0 * pcell->hoff_d)),
            graf_height * (pcell->v.ti.fgdRow +
                           pcell->voff_n / (1.0 * pcell->voff_d)),
            graf_width * pcell->hscl / (1.0 * pcell->hoff_d),
            graf_height * pcell->vscl / (1.0 * pcell->voff_d));
        NSRect bckRect = NSMakeRect(
            graf_width * (pcell->v.ti.bckCol +
                          pcell->hoff_n / (1.0 * pcell->hoff_d)),
            graf_height * (pcell->v.ti.bckRow +
                           pcell->voff_n / (1.0 * pcell->voff_d)),
            graf_width * pcell->hscl / (1.0 * pcell->hoff_d),
            graf_height * pcell->vscl / (1.0 * pcell->voff_d));
        int dbl_height_bck = overdraw_row && (irow > 2) &&
            (pcell->v.ti.bckRow >= overdraw_row &&
             pcell->v.ti.bckRow <= overdraw_max);
        int dbl_height_fgd = overdraw_row && (irow > 2) &&
            (pcell->v.ti.fgdRow >= overdraw_row) &&
            (pcell->v.ti.fgdRow <= overdraw_max);
        int aligned_row = 0, aligned_col = 0;
        int is_first_piece = 0, simple_upper = 0;

        /* Initialize stuff for handling a double-height tile. */
        if (dbl_height_bck || dbl_height_fgd) {
            if (self->terminal == angband_term[0]) {
                aligned_col = ((icol0 - COL_MAP) / pcell->hoff_d) *
                    pcell->hoff_d + COL_MAP;
            } else {
                aligned_col = (icol0 / pcell->hoff_d) * pcell->hoff_d;
            }
            aligned_row = ((irow - ROW_MAP) / pcell->voff_d) *
                pcell->voff_d + ROW_MAP;

            /*
             * If the lower half has been broken into multiple pieces, only
             * do the work of rendering whatever is necessary for the upper
             * half when drawing the first piece (the one closest to the
             * upper left corner).
             */
            struct TerminalCellLocation curs = { 0, 0 };

            [self.contents scanForTypeMaskInBlockAtColumn:aligned_col
                 row:aligned_row width:pcell->hoff_d height:pcell->voff_d
                 mask:TERM_CELL_TILE cursor:&curs];
            if (curs.col + aligned_col == icol0 &&
                curs.row + aligned_row == irow) {
                is_first_piece = 1;

                /*
                 * Hack:  lookup the previous row to determine how much of the
                 * tile there is shown to apply it the upper half of the
                 * double-height tile.  That will do the right thing if there
                 * is a menu displayed in that row but isn't right if there's
                 * an object/creature/feature there that doesn't have a
                 * mapping to the tile set and is rendered with a character.
                 */
                curs.col = 0;
                curs.row = 0;
                [self.contents scanForTypeMaskInBlockAtColumn:aligned_col
                     row:(aligned_row - pcell->voff_d) width:pcell->hoff_d
                     height:pcell->voff_d mask:TERM_CELL_TILE cursor:&curs];
                if (curs.col == 0 && curs.row == 0) {
                    const struct TerminalCell *pcell2 =
                        [self.contents
                             getCellAtColumn:(aligned_col + curs.col)
                             row:(aligned_row + curs.row - pcell->voff_d)];

                    if (pcell2->hscl == pcell2->hoff_d &&
                        pcell2->vscl == pcell2->voff_d) {
                        /*
                         * The tile in the previous row hasn't been clipped
                         * or partially overwritten.  Use a streamlined
                         * rendering procedure.
                         */
                        simple_upper = 1;
                    }
                }
            }
        }

        /*
         * Draw the background.  For a double-height tile, this is only the
         * the lower half.
         */
        draw_image_tile(
            nsctx, ctx, pict_image, bckRect, destinationRect, NSCompositeCopy);
        if (dbl_height_bck && is_first_piece) {
            /* Combine upper half with previously drawn row. */
            if (simple_upper) {
                const struct TerminalCell *pcell2 =
                    [self.contents getCellAtColumn:aligned_col
                         row:(aligned_row - pcell->voff_d)];
                NSRect drect2 =
                    [self viewRectForCellBlockAtX:aligned_col
                          y:(aligned_row - pcell->voff_d)
                          width:pcell2->hscl height:pcell2->vscl];
                NSRect brect2 = NSMakeRect(
                    graf_width * pcell->v.ti.bckCol,
                    graf_height * (pcell->v.ti.bckRow - 1),
                    graf_width, graf_height);

                draw_image_tile(nsctx, ctx, pict_image, brect2, drect2,
                                NSCompositeSourceOver);
            } else {
                struct TerminalCellLocation curs = { 0, 0 };

                [self.contents scanForTypeMaskInBlockAtColumn:aligned_col
                     row:(aligned_row - pcell->voff_d) width:pcell->hoff_d
                     height:pcell->voff_d mask:TERM_CELL_TILE
                     cursor:&curs];
                while (curs.col < pcell->hoff_d &&
                       curs.row < pcell->voff_d) {
                    const struct TerminalCell *pcell2 =
                        [self.contents getCellAtColumn:(aligned_col + curs.col)
                             row:(aligned_row + curs.row - pcell->voff_d)];
                    NSRect drect2 =
                        [self viewRectForCellBlockAtX:(aligned_col + curs.col)
                              y:(aligned_row + curs.row - pcell->voff_d)
                              width:pcell2->hscl height:pcell2->vscl];
                    /*
                     * Column and row in the tile set are from the
                     * double-height tile at *pcell, but the offsets within
                     * that and size are from what's visible for *pcell2.
                     */
                    NSRect brect2 = NSMakeRect(
                        graf_width * (pcell->v.ti.bckCol +
                                      pcell2->hoff_n / (1.0 * pcell2->hoff_d)),
                        graf_height * (pcell->v.ti.bckRow - 1 +
                                       pcell2->voff_n /
                                       (1.0 * pcell2->voff_d)),
                        graf_width * pcell2->hscl / (1.0 * pcell2->hoff_d),
                        graf_height * pcell2->vscl / (1.0 * pcell2->voff_d));

                    draw_image_tile(nsctx, ctx, pict_image, brect2, drect2,
                                    NSCompositeSourceOver);
                    curs.col += pcell2->hscl;
                    [self.contents
                         scanForTypeMaskInBlockAtColumn:aligned_col
                         row:(aligned_row - pcell->voff_d)
                         width:pcell->hoff_d height:pcell->voff_d
                         mask:TERM_CELL_TILE cursor:&curs];
                }
            }
        }

        /* Skip drawing the foreground if it is the same as the background. */
        if (fgdRect.origin.x != bckRect.origin.x ||
            fgdRect.origin.y != bckRect.origin.y) {
            if (is_first_piece && dbl_height_fgd) {
                if (simple_upper) {
                    if (pcell->hoff_n == 0 && pcell->voff_n == 0 &&
                        pcell->hscl == pcell->hoff_d) {
                        /*
                         * Render upper and lower parts as one since they
                         * are contiguous.
                         */
                        fgdRect.origin.y -= graf_height;
                        fgdRect.size.height += graf_height;
                        destinationRect.origin.y -=
                            destinationRect.size.height;
                        destinationRect.size.height +=
                            destinationRect.size.height;
                    } else {
                        /* Not contiguous.  Render the upper half. */
                        NSRect drect2 =
                            [self viewRectForCellBlockAtX:aligned_col
                                  y:(aligned_row - pcell->voff_d)
                                  width:pcell->hoff_d height:pcell->voff_d];
                        NSRect frect2 = NSMakeRect(
                            graf_width * pcell->v.ti.fgdCol,
                            graf_height * (pcell->v.ti.fgdRow - 1),
                            graf_width, graf_height);

                        draw_image_tile(
                            nsctx, ctx, pict_image, frect2, drect2,
                            NSCompositeSourceOver);
                    }
                } else {
                    /* Render the upper half pieces. */
                    struct TerminalCellLocation curs = { 0, 0 };

                    while (1) {
                        [self.contents
                             scanForTypeMaskInBlockAtColumn:aligned_col
                             row:(aligned_row - pcell->voff_d)
                             width:pcell->hoff_d height:pcell->voff_d
                             mask:TERM_CELL_TILE cursor:&curs];

                        if (curs.col >= pcell->hoff_d ||
                            curs.row >= pcell->voff_d) {
                            break;
                        }

                        const struct TerminalCell *pcell2 =
                            [self.contents
                                 getCellAtColumn:(aligned_col + curs.col)
                                 row:(aligned_row + curs.row - pcell->voff_d)];
                        NSRect drect2 =
                            [self viewRectForCellBlockAtX:(aligned_col + curs.col)
                                  y:(aligned_row + curs.row - pcell->voff_d)
                                  width:pcell2->hscl height:pcell2->vscl];
                        NSRect frect2 = NSMakeRect(
                            graf_width * (pcell->v.ti.fgdCol +
                                          pcell2->hoff_n /
                                          (1.0 * pcell2->hoff_d)),
                            graf_height * (pcell->v.ti.fgdRow - 1 +
                                           pcell2->voff_n /
                                           (1.0 * pcell2->voff_d)),
                            graf_width * pcell2->hscl / (1.0 * pcell2->hoff_d),
                            graf_height * pcell2->vscl /
                                (1.0 * pcell2->voff_d));

                        draw_image_tile(nsctx, ctx, pict_image, frect2, drect2,
                                        NSCompositeSourceOver);
                        curs.col += pcell2->hscl;
                    }
                }
            }
            /*
             * Render the foreground (if a double height tile and the bottom
             * part is contiguous with the upper part this also render the
             * upper part.
             */
            draw_image_tile(
                nsctx, ctx, pict_image, fgdRect, destinationRect,
                NSCompositeSourceOver);
        }
        icol0 = [self.contents scanForTypeMaskInRow:irow mask:TERM_CELL_TILE
                     col0:(icol0+pcell->hscl) col1:icol1];
    }

    /* Restore the compositing mode. */
    nsctx.compositingOperation = op;
}

/**
 * This is what our views call to get us to draw to the window
 */
- (void)drawRect:(NSRect)rect inView:(NSView *)view
{
    /*
     * Take this opportunity to throttle so we don't flush faster than desired.
     */
    [self throttle];

    CGFloat bottomY =
        self.borderSize.height + self.tileSize.height * self.rows;
    CGFloat rightX =
        self.borderSize.width + self.tileSize.width * self.cols;

    const NSRect *invalidRects;
    NSInteger invalidCount;
    [view getRectsBeingDrawn:&invalidRects count:&invalidCount];

    /*
     * If the non-border areas need rendering, set some things up so they can
     * be reused for each invalid rectangle.
     */
    NSGraphicsContext *nsctx = nil;
    CGContextRef ctx = 0;
    NSFont* screenFont = nil;
    int graf_width = 0, graf_height = 0;
    int overdraw_row = 0, overdraw_max = 0;
    wchar_t blank = 0;
    if (rect.origin.x < rightX &&
        rect.origin.x + rect.size.width > self.borderSize.width &&
        rect.origin.y < bottomY &&
        rect.origin.y + rect.size.height > self.borderSize.height) {
        nsctx = [NSGraphicsContext currentContext];
        ctx = [nsctx graphicsPort];
        screenFont = [self.angbandViewFont screenFont];
        [screenFont set];
        blank = [TerminalContents getBlankChar];
        if (use_graphics) {
            graf_width = current_graphics_mode->cell_width;
            graf_height = current_graphics_mode->cell_height;
            overdraw_row = current_graphics_mode->overdrawRow;
            overdraw_max = current_graphics_mode->overdrawMax;
        }
    }

    /*
     * With double height tiles, need to have rendered prior rows (i.e.
     * smaller y) before the current one.  Since the invalid rectanges are
     * processed in order, ensure that by sorting the invalid rectangles in
     * increasing order of y origin (AppKit guarantees the invalid rectanges
     * are non-overlapping).
     */
    NSRect* sortedRects = 0;
    const NSRect* workingRects;
    if (overdraw_row && invalidCount > 1) {
        sortedRects = malloc(invalidCount * sizeof(NSRect));
        if (sortedRects == 0) {
            NSException *exc = [NSException exceptionWithName:@"OutOfMemory"
                                            reason:@"sorted rects in drawRect"
                                            userInfo:nil];
            @throw exc;
        }
        (void) memcpy(
            sortedRects, invalidRects, invalidCount * sizeof(NSRect));
        qsort(sortedRects, invalidCount, sizeof(NSRect),
              compare_nsrect_yorigin_greater);
        workingRects = sortedRects;
    } else {
        workingRects = invalidRects;
    }

    /*
     * Use -2 for unknown.  Use -1 for Cocoa's blackColor.  All others are the
     * Angband color index.
     */
    int alast = -2;
    int redrawCursor = 0;

    for (NSInteger irect = 0; irect < invalidCount; ++irect) {
        NSRect modRect, clearRect;
        CGFloat edge;
        int iRowFirst, iRowLast;
        int iColFirst, iColLast;

        /* Handle the top border. */
        if (workingRects[irect].origin.y < self.borderSize.height) {
            edge =
                workingRects[irect].origin.y + workingRects[irect].size.height;
            if (edge <= self.borderSize.height) {
                if (alast != -1) {
                    [[NSColor blackColor] set];
                    alast = -1;
                }
                NSRectFill(workingRects[irect]);
                continue;
            }
            clearRect = workingRects[irect];
            clearRect.size.height =
                self.borderSize.height - workingRects[irect].origin.y;
            if (alast != -1) {
                [[NSColor blackColor] set];
                alast = -1;
            }
            NSRectFill(clearRect);
            modRect.origin.x = workingRects[irect].origin.x;
            modRect.origin.y = self.borderSize.height;
            modRect.size.width = workingRects[irect].size.width;
            modRect.size.height = edge - self.borderSize.height;
        } else {
            modRect = workingRects[irect];
        }

        /* Handle the left border. */
        if (modRect.origin.x < self.borderSize.width) {
            edge = modRect.origin.x + modRect.size.width;
            if (edge <= self.borderSize.width) {
                if (alast != -1) {
                    alast = -1;
                    [[NSColor blackColor] set];
                }
                NSRectFill(modRect);
                continue;
            }
            clearRect = modRect;
            clearRect.size.width = self.borderSize.width - clearRect.origin.x;
            if (alast != -1) {
                alast = -1;
                [[NSColor blackColor] set];
            }
            NSRectFill(clearRect);
            modRect.origin.x = self.borderSize.width;
            modRect.size.width = edge - self.borderSize.width;
        }

        iRowFirst = floor((modRect.origin.y - self.borderSize.height) /
                          self.tileSize.height);
        iColFirst = floor((modRect.origin.x - self.borderSize.width) /
                          self.tileSize.width);
        edge = modRect.origin.y + modRect.size.height;
        if (edge <= bottomY) {
            iRowLast =
                ceil((edge - self.borderSize.height) / self.tileSize.height);
        } else {
            iRowLast = self.rows;
        }
        edge = modRect.origin.x + modRect.size.width;
        if (edge <= rightX) {
            iColLast =
                ceil((edge - self.borderSize.width) / self.tileSize.width);
        } else {
            iColLast = self.cols;
        }

        if (self.contents.cursorColumn != -1 &&
            self.contents.cursorRow != -1 &&
            self.contents.cursorColumn + self.contents.cursorWidth - 1 >=
            iColFirst &&
            self.contents.cursorColumn < iColLast &&
            self.contents.cursorRow + self.contents.cursorHeight - 1 >=
            iRowFirst &&
            self.contents.cursorRow < iRowLast) {
            redrawCursor = 1;
        }

        for (int irow = iRowFirst; irow < iRowLast; ++irow) {
            int icol =
                [self.contents scanForTypeMaskInRow:irow
                     mask:(TERM_CELL_CHAR | TERM_CELL_TILE)
                     col0:iColFirst col1:iColLast];

            while (1) {
                if (icol >= iColLast) {
                    break;
                }

                if ([self.contents getCellAtColumn:icol row:irow]->form ==
                    TERM_CELL_TILE) {
                    /*
                     * It is a tile.  Identify how far the run of tiles goes.
                     */
                    int jcol = [self.contents scanForPredicateInRow:irow
                                    predicate:isTileTop desired:1
                                    col0:(icol + 1) col1:iColLast];

                    [self renderTileRunInRow:irow col0:icol col1:jcol
                          nsctx:nsctx ctx:ctx
                          grafWidth:graf_width grafHeight:graf_height
                          overdrawRow:overdraw_row overdrawMax:overdraw_max];
                    icol = jcol;
                } else {
                    /*
                     * It is a character.  Identify how far the run of
                     * characters goes.
                     */
                    int jcol = [self.contents scanForPredicateInRow:irow
                                    predicate:isCharNoPartial desired:1
                                    col0:(icol + 1) col1:iColLast];
                    int jcol2;

                    if (jcol < iColLast &&
                        isPartiallyOverwrittenBigChar(
                            [self.contents getCellAtColumn:jcol row:irow])) {
                        jcol2 = [self.contents scanForTypeMaskInRow:irow
                                     mask:~TERM_CELL_CHAR_PADDING
                                     col0:(jcol + 1) col1:iColLast];
                    } else {
                        jcol2 = jcol;
                    }

                    /*
                     * Set up clipping rectangle for text.  Save the
                     * graphics context so the clipping rectangle can be
                     * forgotten.  Use CGContextBeginPath to clear the current
                     * path so it does not affect clipping.  Do not call
                     * CGContextSetTextDrawingMode() to include clipping since
                     * that does not appear to necessary on 10.14 and is
                     * actually detrimental:  when displaying more than one
                     * character, only the first is visible.
                     */
                    CGContextSaveGState(ctx);
                    CGContextBeginPath(ctx);
                    NSRect r = [self viewRectForCellBlockAtX:icol y:irow
                                     width:(jcol2 - icol) height:1];
                    CGContextClipToRect(ctx, r);

                    /*
                     * See if the region to be rendered needs to be expanded:
                     * adjacent text that could influence what's in the clipped
                     * region.
                     */
                    int isrch = icol;
                    int irng = icol - self.nColPost;
                    if (irng < 1) {
                        irng = 1;
                    }

                    while (1) {
                        if (isrch <= irng) {
                            break;
                        }

                        const struct TerminalCell *pcell2 =
                            [self.contents getCellAtColumn:(isrch - 1)
                                 row:irow];
                        if (pcell2->form == TERM_CELL_CHAR) {
                            --isrch;
                            if (pcell2->v.ch.glyph != blank) {
                                icol = isrch;
                            }
                        } else if (pcell2->form == TERM_CELL_CHAR_PADDING) {
                            /*
                             * Only extend the rendering if this is padding
                             * for a character that hasn't been partially
                             * overwritten.
                             */
                            if (! isPartiallyOverwrittenBigChar(pcell2)) {
                                if (isrch - pcell2->v.pd.hoff >= 0) {
                                    const struct TerminalCell* pcell3 =
                                        [self.contents
                                             getCellAtColumn:(isrch - pcell2->v.pd.hoff)
                                             row:irow];

                                    if (pcell3->v.ch.glyph != blank) {
                                        icol = isrch - pcell2->v.pd.hoff;
                                        isrch = icol - 1;
                                    } else {
                                        isrch = isrch - pcell2->v.pd.hoff - 1;
                                    }
                                } else {
                                    /* Should not happen, corrupt offset. */
                                    --isrch;
                                }
                            } else {
                                break;
                            }
                        } else {
                            /*
                             * Tiles or tile padding block anything before
                             * them from rendering after them.
                             */
                            break;
                        }
                    }

                    isrch = jcol2;
                    irng = jcol2 + self.nColPre;
                    if (irng > self.cols) {
                        irng = self.cols;
                    }
                    while (1) {
                        if (isrch >= irng) {
                            break;
                        }

                        const struct TerminalCell *pcell2 =
                            [self.contents getCellAtColumn:isrch row:irow];
                        if (pcell2->form == TERM_CELL_CHAR) {
                            if (pcell2->v.ch.glyph != blank) {
                                jcol2 = isrch;
                            }
                            ++isrch;
                        } else if (pcell2->form == TERM_CELL_CHAR_PADDING) {
                            ++isrch;
                        } else {
                            break;
                        }
                    }

                    /* Render text. */
                    /* Clear where rendering will be done. */
                    if (alast != -1) {
                        [[NSColor blackColor] set];
                        alast = -1;
                    }
                    r = [self viewRectForCellBlockAtX:icol y:irow
                              width:(jcol - icol) height:1];
                    NSRectFill(r);

                    while (icol < jcol) {
                        const struct TerminalCell *pcell =
                            [self.contents getCellAtColumn:icol row:irow];

                        /*
                         * For blanks, clearing was all that was necessary.
                         * Don't redraw them.
                         */
                        if (pcell->v.ch.glyph != blank) {
                            int a = pcell->v.ch.attr % MAX_COLORS;

                            if (alast != a) {
                                alast = a;
                                set_color_for_index(a);
                            }
                            r = [self viewRectForCellBlockAtX:icol
                                      y:irow width:pcell->hscl
                                      height:1];
                            [self drawWChar:pcell->v.ch.glyph inRect:r
                                  screenFont:screenFont context:ctx];
                        }
                        icol += pcell->hscl;
                    }

                    /*
                     * Forget the clipping rectangle.  As a side effect, lose
                     * the color.
                     */
                    CGContextRestoreGState(ctx);
                    alast = -2;
                }
                icol =
                    [self.contents scanForTypeMaskInRow:irow
                         mask:(TERM_CELL_CHAR | TERM_CELL_TILE)
                         col0:icol col1:iColLast];
            }
        }

        /* Handle the right border. */
        edge = modRect.origin.x + modRect.size.width;
        if (edge > rightX) {
            if (modRect.origin.x >= rightX) {
                if (alast != -1) {
                    alast = -1;
                    [[NSColor blackColor] set];
                }
                NSRectFill(modRect);
                continue;
            }
            clearRect = modRect;
            clearRect.origin.x = rightX;
            clearRect.size.width = edge - rightX;
            if (alast != -1) {
                alast = -1;
                [[NSColor blackColor] set];
            }
            NSRectFill(clearRect);
            modRect.size.width = edge - modRect.origin.x;
        }

        /* Handle the bottom border. */
        edge = modRect.origin.y + modRect.size.height;
        if (edge > bottomY) {
            if (modRect.origin.y < bottomY) {
                modRect.origin.y = bottomY;
                modRect.size.height = edge - bottomY;
            }
            if (alast != -1) {
                alast = -1;
                [[NSColor blackColor] set];
            }
            NSRectFill(modRect);
        }
    }

    if (redrawCursor) {
        NSRect r = [self viewRectForCellBlockAtX:self.contents.cursorColumn
                         y:self.contents.cursorRow
                         width:self.contents.cursorWidth
                         height:self.contents.cursorHeight];
        [[NSColor yellowColor] set];
        NSFrameRectWithWidth(r, 1);
    }

    free(sortedRects);
}

- (BOOL)isOrderedIn
{
    return [[self->angbandView window] isVisible];
}

- (BOOL)isMainWindow
{
    return [[self->angbandView window] isMainWindow];
}

- (BOOL)isKeyWindow
{
    return [[self->angbandView window] isKeyWindow];
}

- (void)setNeedsDisplay:(BOOL)val
{
    [self->angbandView setNeedsDisplay:val];
}

- (void)setNeedsDisplayInRect:(NSRect)rect
{
    [self->angbandView setNeedsDisplayInRect:rect];
}

- (void)displayIfNeeded
{
    [self->angbandView displayIfNeeded];
}

- (int)terminalIndex
{
        int termIndex = 0;

        for( termIndex = 0; termIndex < ANGBAND_TERM_MAX; termIndex++ )
        {
                if( angband_term[termIndex] == self->terminal )
                {
                        break;
                }
        }

        return termIndex;
}

- (void)resizeTerminalWithContentRect: (NSRect)contentRect saveToDefaults: (BOOL)saveToDefaults
{
    CGFloat newRows = floor(
        (contentRect.size.height - (self.borderSize.height * 2.0)) /
        self.tileSize.height);
    CGFloat newColumns = floor(
        (contentRect.size.width - (self.borderSize.width * 2.0)) /
        self.tileSize.width);

    if (newRows < 1 || newColumns < 1) return;
    [self resizeWithColumns:newColumns rows:newRows];

    int termIndex = [self terminalIndex];
    [self setDefaultTitle:termIndex];

    if( saveToDefaults )
    {
        NSArray *terminals = [[NSUserDefaults standardUserDefaults] valueForKey: AngbandTerminalsDefaultsKey];

        if( termIndex < (int)[terminals count] )
        {
            NSMutableDictionary *mutableTerm = [[NSMutableDictionary alloc] initWithDictionary: [terminals objectAtIndex: termIndex]];
            [mutableTerm setValue: [NSNumber numberWithInteger: self.cols]
                         forKey: AngbandTerminalColumnsDefaultsKey];
            [mutableTerm setValue: [NSNumber numberWithInteger: self.rows]
                         forKey: AngbandTerminalRowsDefaultsKey];

            NSMutableArray *mutableTerminals = [[NSMutableArray alloc] initWithArray: terminals];
            [mutableTerminals replaceObjectAtIndex: termIndex withObject: mutableTerm];

            [[NSUserDefaults standardUserDefaults] setValue: mutableTerminals forKey: AngbandTerminalsDefaultsKey];
        }
    }

    term *old = Term;
    Term_activate( self->terminal );
    Term_resize( self.cols, self.rows );
    Term_redraw();
    Term_activate( old );
}

- (void)constrainWindowSize:(int)termIdx
{
    NSSize minsize;

    if (termIdx == 0) {
        minsize.width = 80;
        minsize.height = 24;
    } else {
        minsize.width = 1;
        minsize.height = 1;
    }
    minsize.width =
        minsize.width * self.tileSize.width + self.borderSize.width * 2.0;
    minsize.height =
        minsize.height * self.tileSize.height + self.borderSize.height * 2.0;
    [[self makePrimaryWindow] setContentMinSize:minsize];
    self.primaryWindow.contentResizeIncrements = self.tileSize;
}

- (void)saveWindowVisibleToDefaults: (BOOL)windowVisible
{
        int termIndex = [self terminalIndex];
        BOOL safeVisibility = (termIndex == 0) ? YES : windowVisible; /* Ensure main term doesn't go away because of these defaults */
        NSArray *terminals = [[NSUserDefaults standardUserDefaults] valueForKey: AngbandTerminalsDefaultsKey];

        if( termIndex < (int)[terminals count] )
        {
                NSMutableDictionary *mutableTerm = [[NSMutableDictionary alloc] initWithDictionary: [terminals objectAtIndex: termIndex]];
                [mutableTerm setValue: [NSNumber numberWithBool: safeVisibility] forKey: AngbandTerminalVisibleDefaultsKey];

                NSMutableArray *mutableTerminals = [[NSMutableArray alloc] initWithArray: terminals];
                [mutableTerminals replaceObjectAtIndex: termIndex withObject: mutableTerm];

                [[NSUserDefaults standardUserDefaults] setValue: mutableTerminals forKey: AngbandTerminalsDefaultsKey];
        }
}

- (BOOL)windowVisibleUsingDefaults
{
        int termIndex = [self terminalIndex];

        if( termIndex == 0 )
        {
                return YES;
        }

        NSArray *terminals = [[NSUserDefaults standardUserDefaults] valueForKey: AngbandTerminalsDefaultsKey];
        BOOL visible = NO;

        if( termIndex < (int)[terminals count] )
        {
                NSDictionary *term = [terminals objectAtIndex: termIndex];
                NSNumber *visibleValue = [term valueForKey: AngbandTerminalVisibleDefaultsKey];

                if( visibleValue != nil )
                {
                        visible = [visibleValue boolValue];
                }
        }

        return visible;
}

#pragma mark -
#pragma mark NSWindowDelegate Methods

/*- (void)windowWillStartLiveResize: (NSNotification *)notification
{ 
}*/ 

- (void)windowDidEndLiveResize: (NSNotification *)notification
{
    NSWindow *window = [notification object];
    NSRect contentRect = [window contentRectForFrameRect: [window frame]];
    [self resizeTerminalWithContentRect: contentRect saveToDefaults: !(self->inFullscreenTransition)];
}

/*- (NSSize)windowWillResize: (NSWindow *)sender toSize: (NSSize)frameSize
{
} */

- (void)windowWillEnterFullScreen: (NSNotification *)notification
{
    self->inFullscreenTransition = YES;
}

- (void)windowDidEnterFullScreen: (NSNotification *)notification
{
    NSWindow *window = [notification object];
    NSRect contentRect = [window contentRectForFrameRect: [window frame]];
    self->inFullscreenTransition = NO;
    [self resizeTerminalWithContentRect: contentRect saveToDefaults: NO];
}

- (void)windowWillExitFullScreen: (NSNotification *)notification
{
    self->inFullscreenTransition = YES;
}

- (void)windowDidExitFullScreen: (NSNotification *)notification
{
    NSWindow *window = [notification object];
    NSRect contentRect = [window contentRectForFrameRect: [window frame]];
    self->inFullscreenTransition = NO;
    [self resizeTerminalWithContentRect: contentRect saveToDefaults: NO];
}

- (void)windowDidBecomeMain:(NSNotification *)notification
{
    NSWindow *window = [notification object];

    if( window != self.primaryWindow )
    {
        return;
    }

    int termIndex = [self terminalIndex];
    NSMenuItem *item = [[[NSApplication sharedApplication] windowsMenu] itemWithTag: AngbandWindowMenuItemTagBase + termIndex];
    [item setState: NSOnState];

    if( [[NSFontPanel sharedFontPanel] isVisible] )
    {
        [[NSFontPanel sharedFontPanel] setPanelFont:self.angbandViewFont
                                       isMultiple: NO];
    }
}

- (void)windowDidResignMain: (NSNotification *)notification
{
    NSWindow *window = [notification object];

    if( window != self.primaryWindow )
    {
        return;
    }

    int termIndex = [self terminalIndex];
    NSMenuItem *item = [[[NSApplication sharedApplication] windowsMenu] itemWithTag: AngbandWindowMenuItemTagBase + termIndex];
    [item setState: NSOffState];
}

- (void)windowWillClose: (NSNotification *)notification
{
    /*
     * If closing only because the application is terminating, don't update
     * the visible state for when the application is relaunched.
     */
    if (! quit_when_ready) {
        [self saveWindowVisibleToDefaults: NO];
    }
}

@end


@implementation AngbandView

- (BOOL)isOpaque
{
    return YES;
}

- (BOOL)isFlipped
{
    return YES;
}

- (void)drawRect:(NSRect)rect
{
    if ([self inLiveResize]) {
        /*
         * Always anchor the cached area to the upper left corner of the view.
         * Any parts on the right or bottom that can't be drawn from the cached
         * area are simply cleared.  Will fill them with appropriate content
         * when resizing is done.
         */
        const NSRect *rects;
        NSInteger count;

        [self getRectsBeingDrawn:&rects count:&count];
        if (count > 0) {
            NSRect viewRect = [self visibleRect];

            [[NSColor blackColor] set];
            while (count-- > 0) {
                CGFloat drawTop = rects[count].origin.y - viewRect.origin.y;
                CGFloat drawBottom = drawTop + rects[count].size.height;
                CGFloat drawLeft = rects[count].origin.x - viewRect.origin.x;
                CGFloat drawRight = drawLeft + rects[count].size.width;
                /*
                 * modRect and clrRect, like rects[count], are in the view
                 * coordinates with y flipped.  cacheRect is in the bitmap
                 * coordinates and y is not flipped.
                 */
                NSRect modRect, clrRect, cacheRect;

                /*
                 * Clip by bottom edge of cached area.  Clear what's below
                 * that.
                 */
                if (drawTop >= self->cacheBounds.size.height) {
                    NSRectFill(rects[count]);
                    continue;
                }
                modRect.origin.x = rects[count].origin.x;
                modRect.origin.y = rects[count].origin.y;
                modRect.size.width = rects[count].size.width;
                cacheRect.origin.y = drawTop;
                if (drawBottom > self->cacheBounds.size.height) {
                    CGFloat excess =
                        drawBottom - self->cacheBounds.size.height;

                    modRect.size.height = rects[count].size.height - excess;
                    cacheRect.origin.y = 0;
                    clrRect.origin.x = modRect.origin.x;
                    clrRect.origin.y = modRect.origin.y + modRect.size.height;
                    clrRect.size.width = modRect.size.width;
                    clrRect.size.height = excess;
                    NSRectFill(clrRect);
                } else {
                    modRect.size.height = rects[count].size.height;
                    cacheRect.origin.y = self->cacheBounds.size.height -
                        rects[count].size.height;
                }
                cacheRect.size.height = modRect.size.height;

                /*
                 * Clip by right edge of cached area.  Clear what's to the
                 * right of that and copy the remainder from the cache.
                 */
                if (drawLeft >= self->cacheBounds.size.width) {
                    NSRectFill(modRect);
                    continue;
                }
                cacheRect.origin.x = drawLeft;
                if (drawRight > self->cacheBounds.size.width) {
                    CGFloat excess = drawRight - self->cacheBounds.size.width;

                    modRect.size.width -= excess;
                    cacheRect.size.width =
                        self->cacheBounds.size.width - drawLeft;
                    clrRect.origin.x = modRect.origin.x + modRect.size.width;
                    clrRect.origin.y = modRect.origin.y;
                    clrRect.size.width = excess;
                    clrRect.size.height = modRect.size.height;
                    NSRectFill(clrRect);
                } else {
                    cacheRect.size.width = drawRight - drawLeft;
                }
                [self->cacheForResize drawInRect:modRect fromRect:cacheRect
                     operation:NSCompositeCopy fraction:1.0
                     respectFlipped:YES hints:nil];
            }
        }
    } else if (! self.angbandContext) {
        /* Draw bright orange, 'cause this ain't right */
        [[NSColor orangeColor] set];
        NSRectFill([self bounds]);
    } else {
        /* Tell the Angband context to draw into us */
        [self.angbandContext drawRect:rect inView:self];
    }
}

/**
 * Override NSView's method to set up a cache that's used in drawRect to
 * handle drawing during a resize.
 */
- (void)viewWillStartLiveResize
{
    [super viewWillStartLiveResize];
    self->cacheBounds = [self visibleRect];
    self->cacheForResize =
        [self bitmapImageRepForCachingDisplayInRect:self->cacheBounds];
    if (self->cacheForResize != nil) {
        [self cacheDisplayInRect:self->cacheBounds
              toBitmapImageRep:self->cacheForResize];
    } else {
        self->cacheBounds.size.width = 0.;
        self->cacheBounds.size.height = 0.;
    }
}

/**
 * Override NSView's method to release the cache set up in
 * viewWillStartLiveResize.
 */
- (void)viewDidEndLiveResize
{
    [super viewDidEndLiveResize];
    self->cacheForResize = nil;
    [self setNeedsDisplay:YES];
}

@end

/**
 * Delay handling of double-clicked savefiles
 */
Boolean open_when_ready = FALSE;



/**
 * ------------------------------------------------------------------------
 * Some generic functions
 * ------------------------------------------------------------------------ */

/**
 * Sets an Angband color at a given index
 */
static void set_color_for_index(int idx)
{
    u16b rv, gv, bv;
    
    /* Extract the R,G,B data */
    rv = angband_color_table[idx][1];
    gv = angband_color_table[idx][2];
    bv = angband_color_table[idx][3];
    
    CGContextSetRGBFillColor([[NSGraphicsContext currentContext] graphicsPort], rv/255., gv/255., bv/255., 1.);
}

/**
 * Remember the current character in UserDefaults so we can select it by
 * default next time.
 */
static void record_current_savefile(void)
{
    NSString *savefileString = [[NSString stringWithCString:savefile encoding:NSMacOSRomanStringEncoding] lastPathComponent];
    if (savefileString)
    {
        NSUserDefaults *angbandDefs = [NSUserDefaults angbandDefaults];
        [angbandDefs setObject:savefileString forKey:@"SaveFile"];
    }
}


#ifdef JP
/**
 * Convert a two-byte EUC-JP encoded character (both *cp and (*cp + 1) are in
 * the range, 0xA1-0xFE, or *cp is 0x8E) to a utf16 value in the native byte
 * ordering.
 */
static wchar_t convert_two_byte_eucjp_to_utf16_native(const char *cp)
{
    NSString* str = [[NSString alloc] initWithBytes:cp length:2
                                      encoding:NSJapaneseEUCStringEncoding];
    wchar_t result = [str characterAtIndex:0];
    str = nil;
    return result;
}
#endif /* JP */


/**
 * ------------------------------------------------------------------------
 * Support for the "z-term.c" package
 * ------------------------------------------------------------------------ */


/**
 * Initialize a new Term
 */
static void Term_init_cocoa(term *t)
{
    @autoreleasepool {
        AngbandContext *context = [[AngbandContext alloc] init];

        /* Give the term ownership of the context */
        t->data = (void *)CFBridgingRetain(context);

        /* Handle graphics */
        t->higher_pict = !! use_graphics;
        t->always_pict = FALSE;

        NSDisableScreenUpdates();

        /*
         * Figure out the frame autosave name based on the index of this term
         */
        NSString *autosaveName = nil;
        int termIdx;
        for (termIdx = 0; termIdx < ANGBAND_TERM_MAX; termIdx++)
        {
            if (angband_term[termIdx] == t)
            {
                autosaveName =
                    [NSString stringWithFormat:@"AngbandTerm-%d", termIdx];
                break;
            }
        }

        /* Set its font. */
        NSString *fontName =
            [[NSUserDefaults angbandDefaults]
                stringForKey:[NSString stringWithFormat:@"FontName-%d", termIdx]];
        if (! fontName) fontName = [[AngbandContext defaultFont] fontName];

        /*
         * Use a smaller default font for the other windows, but only if the
         * font hasn't been explicitly set.
         */
        float fontSize =
            (termIdx > 0) ? 10.0 : [[AngbandContext defaultFont] pointSize];
        NSNumber *fontSizeNumber =
            [[NSUserDefaults angbandDefaults]
                valueForKey: [NSString stringWithFormat: @"FontSize-%d", termIdx]];

        if( fontSizeNumber != nil )
        {
            fontSize = [fontSizeNumber floatValue];
        }

        [context setSelectionFont:[NSFont fontWithName:fontName size:fontSize]
                 adjustTerminal: NO];

        NSArray *terminalDefaults =
            [[NSUserDefaults standardUserDefaults]
                valueForKey: AngbandTerminalsDefaultsKey];
        NSInteger rows = 24;
        NSInteger columns = 80;

        if( termIdx < (int)[terminalDefaults count] )
        {
            NSDictionary *term = [terminalDefaults objectAtIndex: termIdx];
            NSInteger defaultRows =
                [[term valueForKey: AngbandTerminalRowsDefaultsKey]
                    integerValue];
            NSInteger defaultColumns =
                [[term valueForKey: AngbandTerminalColumnsDefaultsKey]
                    integerValue];

            if (defaultRows > 0) rows = defaultRows;
            if (defaultColumns > 0) columns = defaultColumns;
        }

        [context resizeWithColumns:columns rows:rows];

        /* Get the window */
        NSWindow *window = [context makePrimaryWindow];

        /* Set its title and, for auxiliary terms, tentative size */
        [context setDefaultTitle:termIdx];
        [context constrainWindowSize:termIdx];

        /*
         * If this is the first term, and we support full screen (Mac OS X Lion
         * or later), then allow it to go full screen (sweet). Allow other
         * terms to be FullScreenAuxilliary, so they can at least show up.
         * Unfortunately in Lion they don't get brought to the full screen
         * space; but they would only make sense on multiple displays anyways
         * so it's not a big loss.
         */
        if ([window respondsToSelector:@selector(toggleFullScreen:)])
        {
            NSWindowCollectionBehavior behavior = [window collectionBehavior];
            behavior |=
                (termIdx == 0 ?
                 NSWindowCollectionBehaviorFullScreenPrimary :
                 NSWindowCollectionBehaviorFullScreenAuxiliary);
            [window setCollectionBehavior:behavior];
        }

        /* No Resume support yet, though it would not be hard to add */
        if ([window respondsToSelector:@selector(setRestorable:)])
        {
            [window setRestorable:NO];
        }

        /* default window placement */ {
            static NSRect overallBoundingRect;

            if( termIdx == 0 )
            {
                /*
                 * This is a bit of a trick to allow us to display multiple
                 * windows in the "standard default" window position in OS X:
                 * the upper center of the screen.  The term sizes set in
                 * load_prefs() are based on a 5-wide by 3-high grid, with the
                 * main term being 4/5 wide by 2/3 high (hence the scaling to
                 * find what the containing rect would be).
                 */
                NSRect originalMainTermFrame = [window frame];
                NSRect scaledFrame = originalMainTermFrame;
                scaledFrame.size.width *= 5.0 / 4.0;
                scaledFrame.size.height *= 3.0 / 2.0;
                scaledFrame.size.width += 1.0; /* spacing between window columns */
                scaledFrame.size.height += 1.0; /* spacing between window rows */
                [window setFrame: scaledFrame  display: NO];
                [window center];
                overallBoundingRect = [window frame];
                [window setFrame: originalMainTermFrame display: NO];
            }

            static NSRect mainTermBaseRect;
            NSRect windowFrame = [window frame];

            if( termIdx == 0 )
            {
                /*
                 * The height and width adjustments were determined
                 * experimentally, so that the rest of the windows line up
                 * nicely without overlapping.
                 */
                windowFrame.size.width += 7.0;
                windowFrame.size.height += 9.0;
                windowFrame.origin.x = NSMinX( overallBoundingRect );
                windowFrame.origin.y =
                    NSMaxY( overallBoundingRect ) - NSHeight( windowFrame );
                mainTermBaseRect = windowFrame;
            }
            else if( termIdx == 1 )
            {
                windowFrame.origin.x = NSMinX( mainTermBaseRect );
                windowFrame.origin.y =
                    NSMinY( mainTermBaseRect ) - NSHeight( windowFrame ) - 1.0;
            }
            else if( termIdx == 2 )
            {
                windowFrame.origin.x = NSMaxX( mainTermBaseRect ) + 1.0;
                windowFrame.origin.y =
                    NSMaxY( mainTermBaseRect ) - NSHeight( windowFrame );
            }
            else if( termIdx == 3 )
            {
                windowFrame.origin.x = NSMaxX( mainTermBaseRect ) + 1.0;
                windowFrame.origin.y =
                    NSMinY( mainTermBaseRect ) - NSHeight( windowFrame ) - 1.0;
            }
            else if( termIdx == 4 )
            {
                windowFrame.origin.x = NSMaxX( mainTermBaseRect ) + 1.0;
                windowFrame.origin.y = NSMinY( mainTermBaseRect );
            }
            else if( termIdx == 5 )
            {
                windowFrame.origin.x =
                    NSMinX( mainTermBaseRect ) + NSWidth( windowFrame ) + 1.0;
                windowFrame.origin.y =
                    NSMinY( mainTermBaseRect ) - NSHeight( windowFrame ) - 1.0;
            }

            [window setFrame: windowFrame display: NO];
        }

        /*
         * Override the default frame above if the user has adjusted windows in
         * the past
         */
        if (autosaveName) [window setFrameAutosaveName:autosaveName];

        /*
         * Tell it about its term. Do this after we've sized it so that the
         * sizing doesn't trigger redrawing and such.
         */
        [context setTerm:t];

        /*
         * Only order front if it's the first term. Other terms will be ordered
         * front from AngbandUpdateWindowVisibility(). This is to work around a
         * problem where Angband aggressively tells us to initialize terms that
         * don't do anything!
         */
        if (t == angband_term[0])
            [context.primaryWindow makeKeyAndOrderFront: nil];

        NSEnableScreenUpdates();

        /* Set "mapped" flag */
        t->mapped_flag = true;
    }
}



/**
 * Nuke an old Term
 */
static void Term_nuke_cocoa(term *t)
{
    @autoreleasepool {
        AngbandContext *context = (__bridge AngbandContext*) (t->data);
        if (context)
        {
            /* Tell the context to get rid of its windows, etc. */
            [context dispose];

            /* Balance our CFBridgingRetain from when we created it */
            CFRelease(t->data);

            /* Done with it */
            t->data = NULL;
        }
    }
}

/**
 * Returns the CGImageRef corresponding to an image with the given path.
 * Transfers ownership to the caller.
 */
static CGImageRef create_angband_image(NSString *path)
{
    CGImageRef decodedImage = NULL, result = NULL;
    
    /* Try using ImageIO to load the image */
    if (path)
    {
        NSURL *url = [[NSURL alloc] initFileURLWithPath:path isDirectory:NO];
        if (url)
        {
            NSDictionary *options = [[NSDictionary alloc] initWithObjectsAndKeys:(id)kCFBooleanTrue, kCGImageSourceShouldCache, nil];
            CGImageSourceRef source = CGImageSourceCreateWithURL((CFURLRef)url, (CFDictionaryRef)options);
            if (source)
            {
                /*
                 * We really want the largest image, but in practice there's
                 * only going to be one
                 */
                decodedImage = CGImageSourceCreateImageAtIndex(source, 0, (CFDictionaryRef)options);
                CFRelease(source);
            }
        }
    }
    
    /*
     * Draw the sucker to defeat ImageIO's weird desire to cache and decode on
     * demand. Our images aren't that big!
     */
    if (decodedImage)
    {
        size_t width = CGImageGetWidth(decodedImage), height = CGImageGetHeight(decodedImage);
        
        /* Compute our own bitmap info */
        CGBitmapInfo imageBitmapInfo = CGImageGetBitmapInfo(decodedImage);
        CGBitmapInfo contextBitmapInfo = kCGBitmapByteOrderDefault;
        
        switch (imageBitmapInfo & kCGBitmapAlphaInfoMask) {
            case kCGImageAlphaNone:
            case kCGImageAlphaNoneSkipLast:
            case kCGImageAlphaNoneSkipFirst:
                /* No alpha */
                contextBitmapInfo |= kCGImageAlphaNone;
                break;
            default:
                /* Some alpha, use premultiplied last which is most efficient. */
                contextBitmapInfo |= kCGImageAlphaPremultipliedLast;
                break;
        }

        /* Draw the source image flipped, since the view is flipped */
        CGContextRef ctx = CGBitmapContextCreate(NULL, width, height, CGImageGetBitsPerComponent(decodedImage), CGImageGetBytesPerRow(decodedImage), CGImageGetColorSpace(decodedImage), contextBitmapInfo);
        if (ctx) {
            CGContextSetBlendMode(ctx, kCGBlendModeCopy);
            CGContextTranslateCTM(ctx, 0.0, height);
            CGContextScaleCTM(ctx, 1.0, -1.0);
            CGContextDrawImage(
                ctx, CGRectMake(0, 0, width, height), decodedImage);
            result = CGBitmapContextCreateImage(ctx);
            CFRelease(ctx);
        }

        CGImageRelease(decodedImage);
    }
    return result;
}

/**
 * React to changes
 */
static errr Term_xtra_cocoa_react(void)
{
    /* Don't actually switch graphics until the game is running */
    if (!initialized || !game_in_progress) return (-1);

    @autoreleasepool {
        /* Handle graphics */
        int expected_graf_mode = (current_graphics_mode) ?
            current_graphics_mode->grafID : GRAPHICS_NONE;
        if (graf_mode_req != expected_graf_mode)
        {
            graphics_mode *new_mode;
            if (graf_mode_req != GRAPHICS_NONE) {
                new_mode = get_graphics_mode(graf_mode_req);
            } else {
                new_mode = NULL;
            }

            /* Get rid of the old image. CGImageRelease is NULL-safe. */
            CGImageRelease(pict_image);
            pict_image = NULL;

            /* Try creating the image if we want one */
            if (new_mode != NULL)
            {
                NSString *img_path =
                    [NSString stringWithFormat:@"%s/%s", new_mode->path, new_mode->file];
                pict_image = create_angband_image(img_path);

                /* If we failed to create the image, revert to ASCII. */
                if (! pict_image) {
                    new_mode = NULL;
                    if (use_bigtile) {
                        arg_bigtile = FALSE;
                    }
                    [[NSUserDefaults angbandDefaults]
                        setInteger:GRAPHICS_NONE
                        forKey:AngbandGraphicsDefaultsKey];

                    NSString *msg = NSLocalizedStringWithDefaultValue(
                        @"Error.TileSetLoadFailed",
                        AngbandMessageCatalog,
                        [NSBundle mainBundle],
                        @"Failed to Load Tile Set",
                        @"Alert text for failed tile set load");
                    NSString *info = NSLocalizedStringWithDefaultValue(
                        @"Error.TileSetRevertToASCII",
                        AngbandMessageCatalog,
                        [NSBundle mainBundle],
                        @"Could not load the tile set.  Switched back to ASCII.",
                        @"Alert informative message for failed tile set load");
                    NSAlert *alert = [[NSAlert alloc] init];
                    alert.messageText = msg;
                    alert.informativeText = info;
                    [alert runModal];
                }
            }

            if (graphics_are_enabled()) {
                /*
                 * The contents stored in the AngbandContext may have
                 * references to the old tile set.  Out of an abundance
                 * of caution, clear those references in case there's an
                 * attempt to redraw the contents before the core has the
                 * chance to update it via the text_hook, pict_hook, and
                 * wipe_hook.
                 */
                for (int iterm = 0; iterm < ANGBAND_TERM_MAX; ++iterm) {
                    AngbandContext* aContext =
                        (__bridge AngbandContext*) (angband_term[iterm]->data);

                    [aContext.contents wipeTiles];
                }
            }

            /* Record what we did */
            use_graphics = new_mode ? new_mode->grafID : 0;
            ANGBAND_GRAF = (new_mode ? new_mode->graf : "ascii");
            current_graphics_mode = new_mode;

            /* Enable or disable higher picts.  */
            for (int iterm = 0; iterm < ANGBAND_TERM_MAX; ++iterm) {
                if (angband_term[iterm]) {
                    angband_term[iterm]->higher_pict = !! use_graphics;
                }
            }

            if (pict_image && current_graphics_mode)
            {
                /*
                 * Compute the row and column count via the image height and
                 * width.
                 */
                pict_rows = (int)(CGImageGetHeight(pict_image) /
                                  current_graphics_mode->cell_height);
                pict_cols = (int)(CGImageGetWidth(pict_image) /
                                  current_graphics_mode->cell_width);
            }
            else
            {
                pict_rows = 0;
                pict_cols = 0;
            }

            /* Reset visuals */
            if (arg_bigtile == use_bigtile && character_generated)
            {
                reset_visuals();
            }
        }

        if (arg_bigtile != use_bigtile) {
            if (character_generated)
            {
                /* Reset visuals */
                reset_visuals();
            }

            Term_activate(angband_term[0]);
            Term_resize(angband_term[0]->wid, angband_term[0]->hgt);
        }
    }

    /* Success */
    return (0);
}


/**
 * Do a "special thing"
 */
static errr Term_xtra_cocoa(int n, int v)
{
    errr result = 0;
    @autoreleasepool {
        AngbandContext* angbandContext =
            (__bridge AngbandContext*) (Term->data);

        /* Analyze */
        switch (n) {
            /* Make a noise */
        case TERM_XTRA_NOISE:
            NSBeep();
            break;

            /*  Make a sound */
        case TERM_XTRA_SOUND:
            play_sound(v);
            break;

            /* Process random events */
        case TERM_XTRA_BORED:
            /*
             * Show or hide cocoa windows based on the subwindow flags set by
             * the user.
             */
            AngbandUpdateWindowVisibility();
            /* Process an event */
            (void)check_events(CHECK_EVENTS_NO_WAIT);
            break;

            /* Process pending events */
        case TERM_XTRA_EVENT:
            /* Process an event */
            (void)check_events(v);
            break;

            /* Flush all pending events (if any) */
        case TERM_XTRA_FLUSH:
            /* Hack -- flush all events */
            while (check_events(CHECK_EVENTS_DRAIN)) /* loop */;

            break;

            /* Hack -- Change the "soft level" */
        case TERM_XTRA_LEVEL:
            /*
             * Here we could activate (if requested), but I don't think
             * Angband should be telling us our window order (the user
             * should decide that), so do nothing.
             */
            break;

            /* Clear the screen */
        case TERM_XTRA_CLEAR:
            [angbandContext.contents wipe];
            [angbandContext setNeedsDisplay:YES];
            break;

            /* React to changes */
        case TERM_XTRA_REACT:
            result = Term_xtra_cocoa_react();
            break;

            /* Delay (milliseconds) */
        case TERM_XTRA_DELAY:
            /* If needed */
            if (v > 0) {
                double seconds = v / 1000.;
                NSDate* date = [NSDate dateWithTimeIntervalSinceNow:seconds];
                do {
                    NSEvent* event;
                    do {
                        event = [NSApp nextEventMatchingMask:-1
                                       untilDate:date
                                       inMode:NSDefaultRunLoopMode
                                       dequeue:YES];
                        if (event) send_event(event);
                    } while (event);
                } while ([date timeIntervalSinceNow] >= 0);
            }
            break;

            /* Draw the pending changes. */
        case TERM_XTRA_FRESH:
            {
                /*
                 * Check the cursor visibility since the core will tell us
                 * explicitly to draw it, but tells us implicitly to forget it
                 * by simply telling us to redraw a location.
                 */
                int isVisible = 0;

                Term_get_cursor(&isVisible);
                if (! isVisible) {
                    [angbandContext.contents removeCursor];
                }
                [angbandContext computeInvalidRects];
                [angbandContext.changes clear];
            }
            break;

        default:
            /* Oops */
            result = 1;
            break;
        }
    }

    return result;
}

static errr Term_curs_cocoa(TERM_LEN x, TERM_LEN y)
{
    AngbandContext *angbandContext = (__bridge AngbandContext*) (Term->data);

    [angbandContext.contents setCursorAtColumn:x row:y width:1 height:1];
    /*
     * Unfortunately, this (and the same logic in Term_bigcurs_cocoa) will
     * also trigger what's under the cursor to be redrawn as well, even if
     * it has not changed.  In the current drawing implementation, that
     * inefficiency seems unavoidable.
     */
    [angbandContext.changes markChangedAtColumn:x row:y];

    /* Success */
    return 0;
}

/**
 * Draw a cursor that's two tiles wide.  For Japanese, that's used when
 * the cursor points at a kanji character, irregardless of whether operating
 * in big tile mode.
 */
static errr Term_bigcurs_cocoa(TERM_LEN x, TERM_LEN y)
{
    AngbandContext *angbandContext = (__bridge AngbandContext*) (Term->data);

    [angbandContext.contents setCursorAtColumn:x row:y width:2 height:1];
    [angbandContext.changes markChangedBlockAtColumn:x row:y width:2 height:1];

    /* Success */
    return 0;
}

/**
 * Low level graphics (Assumes valid input)
 *
 * Erase "n" characters starting at (x,y)
 */
static errr Term_wipe_cocoa(TERM_LEN x, TERM_LEN y, int n)
{
    AngbandContext *angbandContext = (__bridge AngbandContext*) (Term->data);

    [angbandContext.contents wipeBlockAtColumn:x row:y width:n height:1];
    [angbandContext.changes markChangedRangeAtColumn:x row:y width:n];

    /* Success */
    return 0;
}

static errr Term_pict_cocoa(TERM_LEN x, TERM_LEN y, int n,
                            TERM_COLOR *ap, concptr cp,
                            const TERM_COLOR *tap, concptr tcp)
{
    /* Paranoia: Bail if graphics aren't enabled */
    if (! graphics_are_enabled()) return -1;

    AngbandContext* angbandContext = (__bridge AngbandContext*) (Term->data);
    int step = (use_bigtile) ? 2 : 1;

    int alphablend;
    if (use_graphics) {
        CGImageAlphaInfo ainfo = CGImageGetAlphaInfo(pict_image);

        alphablend = (ainfo & (kCGImageAlphaPremultipliedFirst |
                               kCGImageAlphaPremultipliedLast)) ? 1 : 0;
    } else {
        alphablend = 0;
    }

    for (int i = x; i < x + n * step; i += step) {
        TERM_COLOR a = *ap;
        char c = *cp;
        TERM_COLOR ta = *tap;
        char tc = *tcp;

        ap += step;
        cp += step;
        tap += step;
        tcp += step;
        if (use_graphics && (a & 0x80) && (c & 0x80)) {
            char fgdRow = ((byte)a & 0x7F) % pict_rows;
            char fgdCol = ((byte)c & 0x7F) % pict_cols;
            char bckRow, bckCol;

            if (alphablend) {
                bckRow = ((byte)ta & 0x7F) % pict_rows;
                bckCol = ((byte)tc & 0x7F) % pict_cols;
            } else {
                /*
                 * Not blending so make the background the same as the
                 * the foreground.
                 */
                bckRow = fgdRow;
                bckCol = fgdCol;
            }
            [angbandContext.contents setTileAtColumn:i row:y
                           foregroundColumn:fgdCol
                           foregroundRow:fgdRow
                           backgroundColumn:bckCol
                           backgroundRow:bckRow
                           tileWidth:step
                           tileHeight:1];
            [angbandContext.changes markChangedBlockAtColumn:i row:y
                           width:step height:1];
        }
    }

    /* Success */
    return (0);
}

/**
 * Low level graphics.  Assumes valid input.
 *
 * Draw several ("n") chars, with an attr, at a given location.
 */
static errr Term_text_cocoa(
    TERM_LEN x, TERM_LEN y, int n, TERM_COLOR a, concptr cp)
{
    AngbandContext* angbandContext = (__bridge AngbandContext*) (Term->data);

    [angbandContext.contents setUniformAttributeTextRunAtColumn:x
                   row:y n:n glyphs:cp attribute:a];
    [angbandContext.changes markChangedRangeAtColumn:x row:y width:n];

    /* Success */
    return 0;
}

#if 0
/*
 * From the Linux mbstowcs(3) man page:
 * If dest is NULL, n is ignored, and the conversion proceeds as above,
 * except that the converted wide characters are not written out to
 * memory, and that no length limit exists.
 */
static size_t Term_mbcs_cocoa(wchar_t *dest, const char *src, int n)
{
    int i;
    int count = 0;

    /*
     * Unicode code point to UTF-8
     * 0x0000-0x007f:    0xxxxxxx
     * 0x0080-0x07ff:    110xxxxx 10xxxxxx
     * 0x0800-0xffff:    1110xxxx 10xxxxxx 10xxxxxx
     * 0x10000-0x1fffff: 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
     * Note that UTF-16 limits Unicode to 0x10ffff. This code is not
     * endian-agnostic.
     */
    for (i = 0; i < n || dest == NULL; i++) {
        if ((src[i] & 0x80) == 0) {
            if (dest != NULL) dest[count] = src[i];
            if (src[i] == 0) break;
        } else if ((src[i] & 0xe0) == 0xc0) {
            if (dest != NULL) dest[count] =
                            (((unsigned char)src[i] & 0x1f) << 6)|
                            ((unsigned char)src[i+1] & 0x3f);
            i++;
        } else if ((src[i] & 0xf0) == 0xe0) {
            if (dest != NULL) dest[count] =
                            (((unsigned char)src[i] & 0x0f) << 12) |
                            (((unsigned char)src[i+1] & 0x3f) << 6) |
                            ((unsigned char)src[i+2] & 0x3f);
            i += 2;
        } else if ((src[i] & 0xf8) == 0xf0) {
            if (dest != NULL) dest[count] =
                            (((unsigned char)src[i] & 0x0f) << 18) |
                            (((unsigned char)src[i+1] & 0x3f) << 12) |
                            (((unsigned char)src[i+2] & 0x3f) << 6) |
                            ((unsigned char)src[i+3] & 0x3f);
            i += 3;
        } else {
            /* Found an invalid multibyte sequence */
            return (size_t)-1;
        }
        count++;
    }
    return count;
}
#endif

/**
 * Handle redrawing for a change to the tile set, tile scaling, or main window
 * font.  Returns YES if the redrawing was initiated.  Otherwise returns NO.
 */
static BOOL redraw_for_tiles_or_term0_font(void)
{
    /*
     * In Angband 4.2, do_cmd_redraw() will always clear, but only provides
     * something to replace the erased content if a character has been
     * generated.  In Hengband, do_cmd_redraw() isn't safe to call unless a
     * character has been generated.  Therefore, only call it if a character
     * has been generated.
     */
    if (character_generated) {
        do_cmd_redraw();
        wakeup_event_loop();
        return YES;
    }
    return NO;
}

/**
 * Post a nonsense event so that our event loop wakes up
 */
static void wakeup_event_loop(void)
{
    /* Big hack - send a nonsense event to make us update */
    NSEvent *event = [NSEvent otherEventWithType:NSApplicationDefined location:NSZeroPoint modifierFlags:0 timestamp:0 windowNumber:0 context:NULL subtype:AngbandEventWakeup data1:0 data2:0];
    [NSApp postEvent:event atStart:NO];
}


/**
 * Handle the "open_when_ready" flag
 */
static void handle_open_when_ready(void)
{
    /* Check the flag XXX XXX XXX make a function for this */
    if (open_when_ready && initialized && !game_in_progress)
    {
        /* Forget */
        open_when_ready = FALSE;
        
        /* Game is in progress */
        game_in_progress = TRUE;
        
        /* Wait for a keypress */
        pause_line(Term->hgt - 1);
    }
}


/**
 * Handle quit_when_ready, by Peter Ammon,
 * slightly modified to check inkey_flag.
 */
static void quit_calmly(void)
{
    /* Quit immediately if game's not started */
    if (!game_in_progress || !character_generated) quit(NULL);

    /* Save the game and Quit (if it's safe) */
    if (inkey_flag)
    {
        /* Hack -- Forget messages and term */
        msg_flag = FALSE;
        Term->mapped_flag = FALSE;

        /* Save the game */
        do_cmd_save_game(FALSE);
        record_current_savefile();

        /* Quit */
        quit(NULL);
    }

    /* Wait until inkey_flag is set */
}



/**
 * Returns YES if we contain an AngbandView (and hence should direct our events
 * to Angband)
 */
static BOOL contains_angband_view(NSView *view)
{
    if ([view isKindOfClass:[AngbandView class]]) return YES;
    for (NSView *subview in [view subviews]) {
        if (contains_angband_view(subview)) return YES;
    }
    return NO;
}


/**
 * Queue mouse presses if they occur in the map section of the main window.
 */
static void AngbandHandleEventMouseDown( NSEvent *event )
{
#if 0
        AngbandContext *angbandContext = [[[event window] contentView] angbandContext];
        AngbandContext *mainAngbandContext =
            (__bridge AngbandContext*) (angband_term[0]->data);

        if (mainAngbandContext.primaryWindow &&
            [[event window] windowNumber] ==
            [mainAngbandContext.primaryWindow windowNumber])
        {
                int cols, rows, x, y;
                Term_get_size(&cols, &rows);
                NSSize tileSize = angbandContext.tileSize;
                NSSize border = angbandContext.borderSize;
                NSPoint windowPoint = [event locationInWindow];

                /*
                 * Adjust for border; add border height because window origin
                 * is at bottom
                 */
                windowPoint = NSMakePoint( windowPoint.x - border.width, windowPoint.y + border.height );

                NSPoint p = [[[event window] contentView] convertPoint: windowPoint fromView: nil];
                x = floor( p.x / tileSize.width );
                y = floor( p.y / tileSize.height );

                /*
                 * Being safe about this, since xcode doesn't seem to like the
                 * bool_hack stuff
                 */
                BOOL displayingMapInterface = ((int)inkey_flag != 0);

                /* Sidebar plus border == thirteen characters; top row is reserved. */
                /* Coordinates run from (0,0) to (cols-1, rows-1). */
                BOOL mouseInMapSection = (x > 13 && x <= cols - 1 && y > 0  && y <= rows - 2);

                /*
                 * If we are displaying a menu, allow clicks anywhere within
                 * the terminal bounds; if we are displaying the main game
                 * interface, only allow clicks in the map section
                 */
                if ((!displayingMapInterface && x >= 0 && x < cols &&
                     y >= 0 && y < rows) ||
                     (displayingMapInterface && mouseInMapSection))
                {
                        /*
                         * [event buttonNumber] will return 0 for left click,
                         * 1 for right click, but this is safer
                         */
                        int button = ([event type] == NSLeftMouseDown) ? 1 : 2;

#ifdef KC_MOD_ALT
                        NSUInteger eventModifiers = [event modifierFlags];
                        byte angbandModifiers = 0;
                        angbandModifiers |= (eventModifiers & NSShiftKeyMask) ? KC_MOD_SHIFT : 0;
                        angbandModifiers |= (eventModifiers & NSControlKeyMask) ? KC_MOD_CONTROL : 0;
                        angbandModifiers |= (eventModifiers & NSAlternateKeyMask) ? KC_MOD_ALT : 0;
                        button |= (angbandModifiers & 0x0F) << 4; /* encode modifiers in the button number (see Term_mousepress()) */
#endif

                        Term_mousepress(x, y, button);
                }
        }
#endif

        /* Pass click through to permit focus change, resize, etc. */
        [NSApp sendEvent:event];
}



/**
 * Encodes an NSEvent Angband-style, or forwards it along.  Returns YES if the
 * event was sent to Angband, NO if Cocoa (or nothing) handled it
 */
static BOOL send_event(NSEvent *event)
{

    /* If the receiving window is not an Angband window, then do nothing */
    if (! contains_angband_view([[event window] contentView]))
    {
        [NSApp sendEvent:event];
        return NO;
    }

    /* Analyze the event */
    switch ([event type])
    {
        case NSKeyDown:
        {
            /* Try performing a key equivalent */
            if ([[NSApp mainMenu] performKeyEquivalent:event]) break;
            
            unsigned modifiers = [event modifierFlags];
            
            /* Send all NSCommandKeyMasks through */
            if (modifiers & NSCommandKeyMask)
            {
                [NSApp sendEvent:event];
                break;
            }
            
            if (! [[event characters] length]) break;
            
            
            /* Extract some modifiers */
            int mc = !! (modifiers & NSControlKeyMask);
            int ms = !! (modifiers & NSShiftKeyMask);
            int mo = !! (modifiers & NSAlternateKeyMask);
            int kp = !! (modifiers & NSNumericPadKeyMask);
            
            
            /* Get the Angband char corresponding to this unichar */
            unichar c = [[event characters] characterAtIndex:0];
            char ch;
            /*
             * Have anything from the numeric keypad generate a macro
             * trigger so that shift or control modifiers can be passed.
             */
            if (c <= 0x7F && !kp)
            {
                ch = (char) c;
            }
            else {
                /*
                 * The rest of Hengband uses Angband 2.7's or so key handling:
                 * so for the rest do something like the encoding that
                 * main-win.c does:  send a macro trigger with the Unicode
                 * value encoded into printable ASCII characters.
                 */
                ch = '\0';
            }
            
            /* override special keys */
            switch([event keyCode]) {
                case kVK_Return: ch = '\r'; break;
                case kVK_Escape: ch = 27; break;
                case kVK_Tab: ch = '\t'; break;
                case kVK_Delete: ch = '\b'; break;
                case kVK_ANSI_KeypadEnter: ch = '\r'; kp = TRUE; break;
            }

            /* Hide the mouse pointer */
            [NSCursor setHiddenUntilMouseMoves:YES];
            
            /* Enqueue it */
            if (ch != '\0')
            {
                Term_keypress(ch);
            }
            else
            {
                /*
                 * Could use the hexsym global but some characters overlap with
                 * those used to indicate modifiers.
                 */
                const char encoded[16] = {
                    '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b',
                    'c', 'd', 'e', 'f'
                };

                /* Begin the macro trigger. */
                Term_keypress(31);

                /* Send the modifiers. */
                if (mc) Term_keypress('C');
                if (ms) Term_keypress('S');
                if (mo) Term_keypress('O');
                if (kp) Term_keypress('K');

                do {
                    Term_keypress(encoded[c & 0xF]);
                    c >>= 4;
                } while (c > 0);

                /* End the macro trigger. */
                Term_keypress(13);
            }
            
            break;
        }
            
        case NSLeftMouseDown:
                case NSRightMouseDown:
                        AngbandHandleEventMouseDown(event);
            break;

        case NSApplicationDefined:
        {
            if ([event subtype] == AngbandEventWakeup)
            {
                return YES;
            }
            break;
        }
            
        default:
            [NSApp sendEvent:event];
            return YES;
    }
    return YES;
}

/**
 * Check for Events, return TRUE if we process any
 */
static BOOL check_events(int wait)
{
    BOOL result = YES;

    @autoreleasepool {
        /* Handles the quit_when_ready flag */
        if (quit_when_ready) quit_calmly();

        NSDate* endDate;
        if (wait == CHECK_EVENTS_WAIT) endDate = [NSDate distantFuture];
        else endDate = [NSDate distantPast];

        NSEvent* event;
        for (;;) {
            if (quit_when_ready)
            {
                /* send escape events until we quit */
                Term_keypress(0x1B);
                result = NO;
                break;
            }
            else {
                event = [NSApp nextEventMatchingMask:-1 untilDate:endDate
                               inMode:NSDefaultRunLoopMode dequeue:YES];
                if (! event) {
                    result = NO;
                    break;
                }
                if (send_event(event)) break;
            }
        }
    }

    return result;
}

/**
 * Hook to tell the user something important
 */
static void hook_plog(const char * str)
{
    if (str)
    {
        NSString *msg = NSLocalizedStringWithDefaultValue(
            @"Warning", AngbandMessageCatalog, [NSBundle mainBundle],
            @"Warning", @"Alert text for generic warning");
        NSString *info = [NSString stringWithCString:str
#ifdef JP
                                   encoding:NSJapaneseEUCStringEncoding
#else
                                   encoding:NSMacOSRomanStringEncoding
#endif
        ];
        NSAlert *alert = [[NSAlert alloc] init];

        alert.messageText = msg;
        alert.informativeText = info;
        [alert runModal];
    }
}


/**
 * Hook to tell the user something, and then quit
 */
static void hook_quit(const char * str)
{
    for (int i = ANGBAND_TERM_MAX - 1; i >= 0; --i) {
        if (angband_term[i]) {
            term_nuke(angband_term[i]);
        }
    }
    [AngbandSoundCatalog clearSharedSounds];
    [AngbandContext setDefaultFont:nil];
    plog(str);
    exit(0);
}

/**
 * Return the path for Angband's lib directory and bail if it isn't found. The
 * lib directory should be in the bundle's resources directory, since it's
 * copied when built.
 */
static NSString* get_lib_directory(void)
{
    NSString *bundleLibPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent: AngbandDirectoryNameLib];
    BOOL isDirectory = NO;
    BOOL libExists = [[NSFileManager defaultManager] fileExistsAtPath: bundleLibPath isDirectory: &isDirectory];

    if( !libExists || !isDirectory )
    {
        NSLog( @"%@: can't find %@/ in bundle: isDirectory: %d libExists: %d", @VERSION_NAME, AngbandDirectoryNameLib, isDirectory, libExists );

        NSString *msg = NSLocalizedStringWithDefaultValue(
            @"Error.MissingResources",
            AngbandMessageCatalog,
            [NSBundle mainBundle],
            @"Missing Resources",
            @"Alert text for missing resources");
        NSString *info = NSLocalizedStringWithDefaultValue(
            @"Error.MissingAngbandLib",
            AngbandMessageCatalog,
            [NSBundle mainBundle],
            @"Hengband was unable to find required resources and must quit. Please report a bug on the Angband forums.",
            @"Alert informative message for missing Angband lib/ folder");
        NSString *quit_label = NSLocalizedStringWithDefaultValue(
            @"Label.Quit", AngbandMessageCatalog, [NSBundle mainBundle],
            @"Quit", @"Quit");
        NSAlert *alert = [[NSAlert alloc] init];
        /*
         * Note that NSCriticalAlertStyle was deprecated in 10.10.  The
         * replacement is NSAlertStyleCritical.
         */
        alert.alertStyle = NSCriticalAlertStyle;
        alert.messageText = msg;
        alert.informativeText = info;
        [alert addButtonWithTitle:quit_label];
        [alert runModal];
        exit(0);
    }

    return bundleLibPath;
}

/**
 * Return the path for the directory where Angband should look for its standard
 * user file tree.
 */
static NSString* get_doc_directory(void)
{
        NSString *documents = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];

#if defined(SAFE_DIRECTORY)
        NSString *versionedDirectory = [NSString stringWithFormat: @"%@-%s", AngbandDirectoryNameBase, VERSION_STRING];
        return [documents stringByAppendingPathComponent: versionedDirectory];
#else
        return [documents stringByAppendingPathComponent: AngbandDirectoryNameBase];
#endif
}

/**
 * Adjust directory paths as needed to correct for any differences needed by
 * Angband.  init_file_paths() currently requires that all paths provided have
 * a trailing slash and all other platforms honor this.
 *
 * \param originalPath The directory path to adjust.
 * \return A path suitable for Angband or nil if an error occurred.
 */
static NSString* AngbandCorrectedDirectoryPath(NSString *originalPath)
{
        if ([originalPath length] == 0) {
                return nil;
        }

        if (![originalPath hasSuffix: @"/"]) {
                return [originalPath stringByAppendingString: @"/"];
        }

        return originalPath;
}

/**
 * Give Angband the base paths that should be used for the various directories
 * it needs. It will create any needed directories.
 */
static void prepare_paths_and_directories(void)
{
        char libpath[PATH_MAX + 1] = "\0";
        NSString *libDirectoryPath =
            AngbandCorrectedDirectoryPath(get_lib_directory());
        [libDirectoryPath getFileSystemRepresentation: libpath maxLength: sizeof(libpath)];

        char basepath[PATH_MAX + 1] = "\0";
        NSString *angbandDocumentsPath =
            AngbandCorrectedDirectoryPath(get_doc_directory());
        [angbandDocumentsPath getFileSystemRepresentation: basepath maxLength: sizeof(basepath)];

        init_file_paths(libpath, basepath);
        create_needed_dirs();
}

/**
 * Create and initialize Angband terminal number "i".
 */
static term *term_data_link(int i)
{
    NSArray *terminalDefaults = [[NSUserDefaults standardUserDefaults]
                                    valueForKey: AngbandTerminalsDefaultsKey];
    NSInteger rows = 24;
    NSInteger columns = 80;

    if (i < (int)[terminalDefaults count]) {
        NSDictionary *term = [terminalDefaults objectAtIndex:i];
        rows = [[term valueForKey: AngbandTerminalRowsDefaultsKey]
                   integerValue];
        columns = [[term valueForKey: AngbandTerminalColumnsDefaultsKey]
                      integerValue];
    }

    /* Allocate */
    term *newterm = ZNEW(term);

    /* Initialize the term */
    term_init(newterm, columns, rows, 256 /* keypresses, for some reason? */);

    /* Use a "software" cursor */
    newterm->soft_cursor = TRUE;

    /* Disable the per-row flush notifications since they are not used. */
    newterm->never_frosh = TRUE;

    /*
     * Differentiate between BS/^h, Tab/^i, ... so ^h and ^j work under the
     * roguelike command set.
     */
    /* newterm->complex_input = TRUE; */

    /* Erase with "white space" */
    newterm->attr_blank = TERM_WHITE;
    newterm->char_blank = ' ';

    /* Prepare the init/nuke hooks */
    newterm->init_hook = Term_init_cocoa;
    newterm->nuke_hook = Term_nuke_cocoa;

    /* Prepare the function hooks */
    newterm->xtra_hook = Term_xtra_cocoa;
    newterm->wipe_hook = Term_wipe_cocoa;
    newterm->curs_hook = Term_curs_cocoa;
    newterm->bigcurs_hook = Term_bigcurs_cocoa;
    newterm->text_hook = Term_text_cocoa;
    newterm->pict_hook = Term_pict_cocoa;
    /* newterm->mbcs_hook = Term_mbcs_cocoa; */

    /* Global pointer */
    angband_term[i] = newterm;

    return newterm;
}

/**
 * Load preferences from preferences file for current host+current user+
 * current application.
 */
static void load_prefs(void)
{
    NSUserDefaults *defs = [NSUserDefaults angbandDefaults];

    /* Make some default defaults */
    NSMutableArray *defaultTerms = [[NSMutableArray alloc] init];

    /*
     * The following default rows/cols were determined experimentally by first
     * finding the ideal window/font size combinations. But because of awful
     * temporal coupling in Term_init_cocoa(), it's impossible to set up the
     * defaults there, so we do it this way.
     */
    for (NSUInteger i = 0; i < ANGBAND_TERM_MAX; i++) {
        int columns, rows;
        BOOL visible = YES;

        switch (i) {
        case 0:
            columns = 129;
            rows = 32;
            break;
        case 1:
            columns = 84;
            rows = 20;
            break;
        case 2:
            columns = 42;
            rows = 24;
            break;
        case 3:
            columns = 42;
            rows = 20;
            break;
        case 4:
            columns = 42;
            rows = 16;
            break;
        case 5:
            columns = 84;
            rows = 20;
            break;
        default:
            columns = 80;
            rows = 24;
            visible = NO;
            break;
        }

        NSDictionary *standardTerm =
            [NSDictionary dictionaryWithObjectsAndKeys:
                          [NSNumber numberWithInt: rows], AngbandTerminalRowsDefaultsKey,
                          [NSNumber numberWithInt: columns], AngbandTerminalColumnsDefaultsKey,
                          [NSNumber numberWithBool: visible], AngbandTerminalVisibleDefaultsKey,
                          nil];
        [defaultTerms addObject: standardTerm];
    }

    NSDictionary *defaults = [[NSDictionary alloc] initWithObjectsAndKeys:
#ifdef JP
                              @"Osaka", @"FontName",
#else
                              @"Menlo", @"FontName",
#endif
                              [NSNumber numberWithFloat:13.f], @"FontSize",
                              [NSNumber numberWithInt:60], AngbandFrameRateDefaultsKey,
                              [NSNumber numberWithBool:YES], AngbandSoundDefaultsKey,
                              [NSNumber numberWithInt:GRAPHICS_NONE], AngbandGraphicsDefaultsKey,
                              [NSNumber numberWithBool:YES], AngbandBigTileDefaultsKey,
                              defaultTerms, AngbandTerminalsDefaultsKey,
                              nil];
    [defs registerDefaults:defaults];

    /* Preferred graphics mode */
    graf_mode_req = [defs integerForKey:AngbandGraphicsDefaultsKey];
    if (graphics_will_be_enabled() &&
        [defs boolForKey:AngbandBigTileDefaultsKey] == YES) {
        use_bigtile = TRUE;
        arg_bigtile = TRUE;
    } else {
        use_bigtile = FALSE;
        arg_bigtile = FALSE;
    }

    /* Use sounds; set the Angband global */
    if ([defs boolForKey:AngbandSoundDefaultsKey] == YES) {
        use_sound = TRUE;
        [AngbandSoundCatalog sharedSounds].enabled = YES;
    } else {
        use_sound = FALSE;
        [AngbandSoundCatalog sharedSounds].enabled = NO;
    }

    /* fps */
    frames_per_second = [defs integerForKey:AngbandFrameRateDefaultsKey];

    /* Font */
    [AngbandContext
        setDefaultFont:[NSFont fontWithName:[defs valueForKey:@"FontName-0"]
                               size:[defs floatForKey:@"FontSize-0"]]];
    if (! [AngbandContext defaultFont])
        [AngbandContext
            setDefaultFont:[NSFont fontWithName:@"Menlo" size:13.]];
}

/**
 * Play sound effects asynchronously.  Select a sound from any available
 * for the required event, and bridge to Cocoa to play it.
 */
static void play_sound(int event)
{
    [[AngbandSoundCatalog sharedSounds] playSound:event];
}

/**
 * Allocate the primary Angband terminal and activate it.  Allocate the other
 * Angband terminals.
 */
static void init_windows(void)
{
    /* Create the primary window */
    term *primary = term_data_link(0);

    /* Prepare to create any additional windows */
    for (int i = 1; i < ANGBAND_TERM_MAX; i++) {
        term_data_link(i);
    }

    /* Activate the primary term */
    Term_activate(primary);
}

/**
 * ------------------------------------------------------------------------
 * Main program
 * ------------------------------------------------------------------------ */

@implementation AngbandAppDelegate

@synthesize graphicsMenu=_graphicsMenu;
@synthesize commandMenu=_commandMenu;
@synthesize commandMenuTagMap=_commandMenuTagMap;

- (IBAction)newGame:sender
{
    /* Game is in progress */
    game_in_progress = TRUE;
    new_game = TRUE;
}

- (IBAction)editFont:sender
{
    NSFontPanel *panel = [NSFontPanel sharedFontPanel];
    NSFont *termFont = [AngbandContext defaultFont];

    int i;
    for (i=0; i < ANGBAND_TERM_MAX; i++) {
        AngbandContext *context =
            (__bridge AngbandContext*) (angband_term[i]->data);
        if ([context isKeyWindow]) {
            termFont = [context angbandViewFont];
            break;
        }
    }

    [panel setPanelFont:termFont isMultiple:NO];
    [panel orderFront:self];
}

/**
 * Implement NSObject's changeFont() method to receive a notification about the
 * changed font.  Note that, as of 10.14, changeFont() is deprecated in
 * NSObject - it will be removed at some point and the application delegate
 * will have to be declared as implementing the NSFontChanging protocol.
 */
- (void)changeFont:(id)sender
{
    int mainTerm;
    for (mainTerm=0; mainTerm < ANGBAND_TERM_MAX; mainTerm++) {
        AngbandContext *context =
            (__bridge AngbandContext*) (angband_term[mainTerm]->data);
        if ([context isKeyWindow]) {
            break;
        }
    }

    /* Bug #1709: Only change font for angband windows */
    if (mainTerm == ANGBAND_TERM_MAX) return;

    NSFont *oldFont = [AngbandContext defaultFont];
    NSFont *newFont = [sender convertFont:oldFont];
    if (! newFont) return; /*paranoia */

    /* Store as the default font if we changed the first term */
    if (mainTerm == 0) {
        [AngbandContext setDefaultFont:newFont];
    }

    /* Record it in the preferences */
    NSUserDefaults *defs = [NSUserDefaults angbandDefaults];
    [defs setValue:[newFont fontName] 
        forKey:[NSString stringWithFormat:@"FontName-%d", mainTerm]];
    [defs setFloat:[newFont pointSize]
        forKey:[NSString stringWithFormat:@"FontSize-%d", mainTerm]];

    NSDisableScreenUpdates();

    /* Update window */
    AngbandContext *angbandContext =
        (__bridge AngbandContext*) (angband_term[mainTerm]->data);
    [(id)angbandContext setSelectionFont:newFont adjustTerminal: YES];

    NSEnableScreenUpdates();

    if (mainTerm != 0 || ! redraw_for_tiles_or_term0_font()) {
        [(id)angbandContext requestRedraw];
    }
}

- (IBAction)openGame:sender
{
    @autoreleasepool {
        BOOL selectedSomething = NO;
        int panelResult;

        /* Get where we think the save files are */
        NSURL *startingDirectoryURL =
            [NSURL fileURLWithPath:[NSString stringWithCString:ANGBAND_DIR_SAVE encoding:NSASCIIStringEncoding]
                   isDirectory:YES];

        /* Set up an open panel */
        NSOpenPanel* panel = [NSOpenPanel openPanel];
        [panel setCanChooseFiles:YES];
        [panel setCanChooseDirectories:NO];
        [panel setResolvesAliases:YES];
        [panel setAllowsMultipleSelection:NO];
        [panel setTreatsFilePackagesAsDirectories:YES];
        [panel setDirectoryURL:startingDirectoryURL];

        /* Run it */
        panelResult = [panel runModal];
        if (panelResult == NSOKButton)
        {
            NSArray* fileURLs = [panel URLs];
            if ([fileURLs count] > 0 && [[fileURLs objectAtIndex:0] isFileURL])
            {
                NSURL* savefileURL = (NSURL *)[fileURLs objectAtIndex:0];
                /*
                 * The path property doesn't do the right thing except for
                 * URLs with the file scheme. We had
                 * getFileSystemRepresentation here before, but that wasn't
                 * introduced until OS X 10.9.
                 */
                selectedSomething = [[savefileURL path]
                                        getCString:savefile
                                        maxLength:sizeof savefile
                                        encoding:NSMacOSRomanStringEncoding];
            }
        }

        if (selectedSomething)
        {
            /* Remember this so we can select it by default next time */
            record_current_savefile();

            /* Game is in progress */
            game_in_progress = TRUE;
        }
    }
}

- (IBAction)saveGame:sender
{
    /* Hack -- Forget messages */
    msg_flag = FALSE;
    
    /* Save the game */
    do_cmd_save_game(FALSE);
    
    /*
     * Record the current save file so we can select it by default next time.
     * It's a little sketchy that this only happens when we save through the
     * menu; ideally game-triggered saves would trigger it too.
     */
    record_current_savefile();
}

/**
 * Entry point for initializing Angband
 */
- (void)beginGame
{
    @autoreleasepool {
        /* Hooks in some "z-util.c" hooks */
        plog_aux = hook_plog;
        quit_aux = hook_quit;

        /* Initialize file paths */
        prepare_paths_and_directories();

        /* Note the "system" */
        ANGBAND_SYS = "coc";

        /* Load possible graphics modes */
        init_graphics_modes();

        /* Load preferences */
        load_prefs();

        /* Prepare the windows */
        init_windows();

        /* Set up game event handlers */
        /* init_display(); */

        /* Register the sound hook */
        /* sound_hook = play_sound; */

        /* Initialize some save file stuff */
        player_euid = geteuid();
        player_egid = getegid();

        /* Initialise game */
        init_angband();

        /* We are now initialized */
        initialized = TRUE;

        /* Handle "open_when_ready" */
        handle_open_when_ready();

        /* Handle pending events (most notably update) and flush input */
        Term_flush();

        /*
         * Prompt the user; assume the splash screen is 80 x 23 and position
         * relative to that rather than center based on the full size of the
         * window.
         */
        int message_row = 23;
        Term_erase(0, message_row, 255);
        put_str(
#ifdef JP
            "['ファイル' メニューから '新規' または '開く' を選択します]",
            message_row, (80 - 59) / 2
#else
            "[Choose 'New' or 'Open' from the 'File' menu]",
            message_row, (80 - 45) / 2
#endif
        );
        Term_fresh();
    }

    while (!game_in_progress) {
        @autoreleasepool {
            NSEvent *event = [NSApp nextEventMatchingMask:NSAnyEventMask untilDate:[NSDate distantFuture] inMode:NSDefaultRunLoopMode dequeue:YES];
            if (event) [NSApp sendEvent:event];
        }
    }

    /*
     * Play a game -- "new_game" is set by "new", "open" or the open document
     * even handler as appropriate
     */
    Term_fresh();
    play_game(new_game);

    quit(NULL);
}

/**
 * Implement NSObject's validateMenuItem() method to override enabling or
 * disabling a menu item.  Note that, as of 10.14, validateMenuItem() is
 * deprecated in NSObject - it will be removed at some point and the
 * application delegate will have to be declared as implementing the
 * NSMenuItemValidation protocol.
 */
- (BOOL)validateMenuItem:(NSMenuItem *)menuItem
{
    SEL sel = [menuItem action];
    NSInteger tag = [menuItem tag];

    if( tag >= AngbandWindowMenuItemTagBase && tag < AngbandWindowMenuItemTagBase + ANGBAND_TERM_MAX )
    {
        if( tag == AngbandWindowMenuItemTagBase )
        {
            /* The main window should always be available and visible */
            return YES;
        }
        else
        {
            /*
             * Another window is only usable after Term_init_cocoa() has
             * been called for it.  For Angband, if window_flag[i] is nonzero
             * then that has happened for window i.  For Hengband, that is
             * not the case so also test angband_term[i]->data.
             */
            NSInteger subwindowNumber = tag - AngbandWindowMenuItemTagBase;
            return (angband_term[subwindowNumber]->data != 0
                    && window_flag[subwindowNumber] > 0);
        }

        return NO;
    }

    if (sel == @selector(newGame:))
    {
        return ! game_in_progress;
    }
    else if (sel == @selector(editFont:))
    {
        return YES;
    }
    else if (sel == @selector(openGame:))
    {
        return ! game_in_progress;
    }
    else if (sel == @selector(setRefreshRate:) &&
             [[menuItem parentItem] tag] == 150)
    {
        NSInteger fps = [[NSUserDefaults standardUserDefaults] integerForKey:AngbandFrameRateDefaultsKey];
        [menuItem setState: ([menuItem tag] == fps)];
        return YES;
    }
    else if( sel == @selector(setGraphicsMode:) )
    {
        NSInteger requestedGraphicsMode = [[NSUserDefaults standardUserDefaults] integerForKey:AngbandGraphicsDefaultsKey];
        [menuItem setState: (tag == requestedGraphicsMode)];
        return YES;
    }
    else if( sel == @selector(toggleSound:) )
    {
        BOOL is_on = [[NSUserDefaults standardUserDefaults]
                         boolForKey:AngbandSoundDefaultsKey];

        [menuItem setState: ((is_on) ? NSOnState : NSOffState)];
        return YES;
    }
    else if (sel == @selector(toggleWideTiles:)) {
        BOOL is_on = [[NSUserDefaults standardUserDefaults]
                         boolForKey:AngbandBigTileDefaultsKey];

        [menuItem setState: ((is_on) ? NSOnState : NSOffState)];
        return YES;
    }
    else if( sel == @selector(sendAngbandCommand:) ||
             sel == @selector(saveGame:) )
    {
        /*
         * we only want to be able to send commands during an active game
         * after the birth screens
         */
        return !!game_in_progress && character_generated;
    }
    else return YES;
}


- (IBAction)setRefreshRate:(NSMenuItem *)menuItem
{
    frames_per_second = [menuItem tag];
    [[NSUserDefaults angbandDefaults] setInteger:frames_per_second forKey:AngbandFrameRateDefaultsKey];
}

- (void)setGraphicsMode:(NSMenuItem *)sender
{
    /* We stashed the graphics mode ID in the menu item's tag */
    graf_mode_req = [sender tag];

    /* Stash it in UserDefaults */
    [[NSUserDefaults angbandDefaults] setInteger:graf_mode_req forKey:AngbandGraphicsDefaultsKey];

    if (! graphics_will_be_enabled()) {
        if (use_bigtile) {
            arg_bigtile = FALSE;
        }
    } else if ([[NSUserDefaults angbandDefaults] boolForKey:AngbandBigTileDefaultsKey] == YES &&
               ! use_bigtile) {
        arg_bigtile = TRUE;
    }

    if (arg_bigtile != use_bigtile) {
        Term_activate(angband_term[0]);
        Term_resize(angband_term[0]->wid, angband_term[0]->hgt);
    }
    redraw_for_tiles_or_term0_font();
}

- (void)selectWindow: (id)sender
{
    NSInteger subwindowNumber =
        [(NSMenuItem *)sender tag] - AngbandWindowMenuItemTagBase;
    AngbandContext *context =
        (__bridge AngbandContext*) (angband_term[subwindowNumber]->data);
    [context.primaryWindow makeKeyAndOrderFront: self];
    [context saveWindowVisibleToDefaults: YES];
}

- (IBAction) toggleSound: (NSMenuItem *) sender
{
    BOOL is_on = (sender.state == NSOnState);

    /* Toggle the state and update the Angband global and preferences. */
    if (is_on) {
        sender.state = NSOffState;
        use_sound = FALSE;
        [AngbandSoundCatalog sharedSounds].enabled = NO;
    } else {
        sender.state = NSOnState;
        use_sound = TRUE;
        [AngbandSoundCatalog sharedSounds].enabled = YES;
    }
    [[NSUserDefaults angbandDefaults] setBool:(! is_on)
                                      forKey:AngbandSoundDefaultsKey];
}

- (IBAction)toggleWideTiles:(NSMenuItem *) sender
{
    BOOL is_on = (sender.state == NSOnState);

    /* Toggle the state and update the Angband globals and preferences. */
    sender.state = (is_on) ? NSOffState : NSOnState;
    [[NSUserDefaults angbandDefaults] setBool:(! is_on)
                                      forKey:AngbandBigTileDefaultsKey];
    if (graphics_are_enabled()) {
        arg_bigtile = (is_on) ? FALSE : TRUE;
        if (arg_bigtile != use_bigtile) {
            Term_activate(angband_term[0]);
            Term_resize(angband_term[0]->wid, angband_term[0]->hgt);
            redraw_for_tiles_or_term0_font();
        }
    }
}

- (void)prepareWindowsMenu
{
    @autoreleasepool {
        /*
         * Get the window menu with default items and add a separator and
         * item for the main window.
         */
        NSMenu *windowsMenu = [[NSApplication sharedApplication] windowsMenu];
        [windowsMenu addItem: [NSMenuItem separatorItem]];

        NSString *title1 = [NSString stringWithCString:angband_term_name[0]
#ifdef JP
                                     encoding:NSJapaneseEUCStringEncoding
#else
                                     encoding:NSMacOSRomanStringEncoding
#endif
        ];
        NSMenuItem *angbandItem = [[NSMenuItem alloc] initWithTitle:title1 action: @selector(selectWindow:) keyEquivalent: @"0"];
        [angbandItem setTarget: self];
        [angbandItem setTag: AngbandWindowMenuItemTagBase];
        [windowsMenu addItem: angbandItem];

        /* Add items for the additional term windows */
        for( NSInteger i = 1; i < ANGBAND_TERM_MAX; i++ )
        {
            NSString *title = [NSString stringWithCString:angband_term_name[i]
#ifdef JP
                                        encoding:NSJapaneseEUCStringEncoding
#else
                                        encoding:NSMacOSRomanStringEncoding
#endif
            ];
            NSString *keyEquivalent =
                [NSString stringWithFormat: @"%ld", (long)i];
            NSMenuItem *windowItem =
                [[NSMenuItem alloc] initWithTitle: title
                                    action: @selector(selectWindow:)
                                    keyEquivalent: keyEquivalent];
            [windowItem setTarget: self];
            [windowItem setTag: AngbandWindowMenuItemTagBase + i];
            [windowsMenu addItem: windowItem];
        }
    }
}

/**
 * Send a command to Angband via a menu item. This places the appropriate key
 * down events into the queue so that it seems like the user pressed them
 * (instead of trying to use the term directly).
 */
- (void)sendAngbandCommand: (id)sender
{
    NSMenuItem *menuItem = (NSMenuItem *)sender;
    NSString *command = [self.commandMenuTagMap objectForKey: [NSNumber numberWithInteger: [menuItem tag]]];
    AngbandContext* context =
        (__bridge AngbandContext*) (angband_term[0]->data);
    NSInteger windowNumber = [context.primaryWindow windowNumber];

    /* Send a \ to bypass keymaps */
    NSEvent *escape = [NSEvent keyEventWithType: NSKeyDown
                                       location: NSZeroPoint
                                  modifierFlags: 0
                                      timestamp: 0.0
                                   windowNumber: windowNumber
                                        context: nil
                                     characters: @"\\"
                    charactersIgnoringModifiers: @"\\"
                                      isARepeat: NO
                                        keyCode: 0];
    [[NSApplication sharedApplication] postEvent: escape atStart: NO];

    /* Send the actual command (from the original command set) */
    NSEvent *keyDown = [NSEvent keyEventWithType: NSKeyDown
                                        location: NSZeroPoint
                                   modifierFlags: 0
                                       timestamp: 0.0
                                    windowNumber: windowNumber
                                         context: nil
                                      characters: command
                     charactersIgnoringModifiers: command
                                       isARepeat: NO
                                         keyCode: 0];
    [[NSApplication sharedApplication] postEvent: keyDown atStart: NO];
}

/**
 * Set up the command menu dynamically, based on CommandMenu.plist.
 */
- (void)prepareCommandMenu
{
    @autoreleasepool {
        NSString *commandMenuPath =
            [[NSBundle mainBundle] pathForResource: @"CommandMenu"
                                   ofType: @"plist"];
        NSArray *commandMenuItems =
            [[NSArray alloc] initWithContentsOfFile: commandMenuPath];
        NSMutableDictionary *angbandCommands =
            [[NSMutableDictionary alloc] init];
        NSString *tblname = @"CommandMenu";
        NSInteger tagOffset = 0;

        for( NSDictionary *item in commandMenuItems )
        {
            BOOL useShiftModifier =
                [[item valueForKey: @"ShiftModifier"] boolValue];
            BOOL useOptionModifier =
                [[item valueForKey: @"OptionModifier"] boolValue];
            NSUInteger keyModifiers = NSCommandKeyMask;
            keyModifiers |= (useShiftModifier) ? NSShiftKeyMask : 0;
            keyModifiers |= (useOptionModifier) ? NSAlternateKeyMask : 0;

            NSString *lookup = [item valueForKey: @"Title"];
            NSString *title = NSLocalizedStringWithDefaultValue(
                lookup, tblname, [NSBundle mainBundle], lookup, @"");
            NSString *key = [item valueForKey: @"KeyEquivalent"];
            NSMenuItem *menuItem =
                [[NSMenuItem alloc] initWithTitle: title
                                    action: @selector(sendAngbandCommand:)
                                    keyEquivalent: key];
            [menuItem setTarget: self];
            [menuItem setKeyEquivalentModifierMask: keyModifiers];
            [menuItem setTag: AngbandCommandMenuItemTagBase + tagOffset];
            [self.commandMenu addItem: menuItem];

            NSString *angbandCommand = [item valueForKey: @"AngbandCommand"];
            [angbandCommands setObject: angbandCommand
                             forKey: [NSNumber numberWithInteger: [menuItem tag]]];
            tagOffset++;
        }

        self.commandMenuTagMap = [[NSDictionary alloc]
                                     initWithDictionary: angbandCommands];
    }
}

- (void)awakeFromNib
{
    [super awakeFromNib];

    [self prepareWindowsMenu];
    [self prepareCommandMenu];
}

- (void)applicationDidFinishLaunching:sender
{
    [self beginGame];
    
    /*
     * Once beginGame finished, the game is over - that's how Angband works,
     * and we should quit
     */
    game_is_finished = TRUE;
    [NSApp terminate:self];
}

- (NSApplicationTerminateReply)applicationShouldTerminate:(NSApplication *)sender
{
    if (p_ptr->playing == FALSE || game_is_finished == TRUE)
    {
        quit_when_ready = true;
        return NSTerminateNow;
    }
    else if (! inkey_flag)
    {
        /* For compatibility with other ports, do not quit in this case */
        return NSTerminateCancel;
    }
    else
    {
        /* Stop playing */
        /* player->upkeep->playing = FALSE; */

        /*
         * Post an escape event so that we can return from our get-key-event
         * function
         */
        wakeup_event_loop();
        quit_when_ready = true;
        /*
         * Must return Cancel, not Later, because we need to get out of the
         * run loop and back to Angband's loop
         */
        return NSTerminateCancel;
    }
}

/**
 * Dynamically build the Graphics menu
 */
- (void)menuNeedsUpdate:(NSMenu *)menu {
    
    /* Only the graphics menu is dynamic */
    if (! [menu isEqual:self.graphicsMenu])
        return;
    
    /*
     * If it's non-empty, then we've already built it. Currently graphics modes
     * won't change once created; if they ever can we can remove this check.
     * Note that the check mark does change, but that's handled in
     * validateMenuItem: instead of menuNeedsUpdate:
     */
    if ([menu numberOfItems] > 0)
        return;
    
    /* This is the action for all these menu items */
    SEL action = @selector(setGraphicsMode:);
    
    /* Add an initial Classic ASCII menu item */
    NSString *tblname = @"GraphicsMenu";
    NSString *key = @"Classic ASCII";
    NSString *title = NSLocalizedStringWithDefaultValue(
        key, tblname, [NSBundle mainBundle], key, @"");
    NSMenuItem *classicItem = [menu addItemWithTitle:title action:action keyEquivalent:@""];
    [classicItem setTag:GRAPHICS_NONE];
    
    /* Walk through the list of graphics modes */
    if (graphics_modes) {
        NSInteger i;

        for (i=0; graphics_modes[i].pNext; i++)
        {
            const graphics_mode *graf = &graphics_modes[i];

            if (graf->grafID == GRAPHICS_NONE) {
                continue;
            }
            /* Make the title. NSMenuItem throws on a nil title, so ensure it's
                   * not nil. */
            key = [[NSString alloc] initWithUTF8String:graf->menuname];
            title = NSLocalizedStringWithDefaultValue(
                key, tblname, [NSBundle mainBundle], key, @"");

            /* Make the item */
            NSMenuItem *item = [menu addItemWithTitle:title action:action keyEquivalent:@""];
            [item setTag:graf->grafID];
        }
    }
}

/**
 * Delegate method that gets called if we're asked to open a file.
 */
- (void)application:(NSApplication *)sender openFiles:(NSArray *)filenames
{
    /* Can't open a file once we've started */
    if (game_in_progress) {
        [[NSApplication sharedApplication]
            replyToOpenOrPrint:NSApplicationDelegateReplyFailure];
        return;
    }

    /* We can only open one file. Use the last one. */
    NSString *file = [filenames lastObject];
    if (! file) {
        [[NSApplication sharedApplication]
            replyToOpenOrPrint:NSApplicationDelegateReplyFailure];
        return;
    }

    /* Put it in savefile */
    if (! [file getFileSystemRepresentation:savefile maxLength:sizeof savefile]) {
        [[NSApplication sharedApplication]
            replyToOpenOrPrint:NSApplicationDelegateReplyFailure];
        return;
    }

    game_in_progress = TRUE;

    /*
     * Wake us up in case this arrives while we're sitting at the Welcome
     * screen!
     */
    wakeup_event_loop();

    [[NSApplication sharedApplication]
        replyToOpenOrPrint:NSApplicationDelegateReplySuccess];
}

@end

int main(int argc, char* argv[])
{
    NSApplicationMain(argc, (void*)argv);
    return (0);
}

#endif /* MACINTOSH || MACH_O_COCOA */