ext2ed/win.c

   1 /*
   2
   3 /usr/src/ext2ed/win.c
   4
   5 A part of the extended file system 2 disk editor.
   6
   7 --------------------------------------------------------
   8 Window management - Interfacing with the ncurses library
   9 --------------------------------------------------------
  10
  11 First written on: April 17 1995
  12 Modified on : April 05 2001 Christian.Bac@int-evry.fr
  13 it looks like readline does not like that initscr decides to set the tty to
  14 noecho.
  15
  16 Copyright (C) 1995 Gadi Oxman
  17
  18 */
  19
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23 #include <termios.h>
  24 #include <unistd.h>
  25
  26 #include "ext2ed.h"
  27
  28 struct struct_pad_info show_pad_info;
  29 WINDOW *title_win,*show_win,*command_win,*show_pad;
  30
  31 /* to remember configuration after initscr
  32  * and modify it
  33  */
  34 struct termios termioInit, termioCurrent;
  35
  36 void init_windows (void)
  37
  38 {
  39         char title_string [80];
  40
  41         initscr ();
  42         tcgetattr(0,&termioInit); /* save initial config */
  43         termioCurrent = termioInit;
  44         termioCurrent.c_lflag |= ECHO; /* set echo on */
  45         tcsetattr(0,TCSANOW,&termioCurrent);
  46
  47         if (LINES<TITLE_WIN_LINES+SHOW_WIN_LINES+COMMAND_WIN_LINES+3) {
  48                 printf ("Sorry, your terminal screen is too small\n");
  49                 printf ("Error - Can not initialize windows\n");
  50                 exit (1);
  51         }
  52
  53         title_win=newwin (TITLE_WIN_LINES,COLS,0,0);
  54         show_win=newwin (SHOW_WIN_LINES,COLS,TITLE_WIN_LINES,0);
  55         show_pad=newpad (SHOW_PAD_LINES,SHOW_PAD_COLS);
  56         command_win=newwin (COMMAND_WIN_LINES,COLS,LINES-COMMAND_WIN_LINES,0);
  57
  58         if (title_win==NULL || show_win==NULL || show_pad==NULL || command_win==NULL) {
  59                 printf ("Error - Not enough memory - Can not initialize windows\n");exit (1);
  60         }
  61
  62         box (title_win,0,0);
  63         sprintf (title_string,"EXT2ED - Extended-2 File System editor ver %d.%d (%s)",version_major,version_minor,revision_date);
  64         wmove (title_win,TITLE_WIN_LINES/2,(COLS-strlen (title_string))/2);
  65         wprintw (title_win,title_string);
  66
  67 #ifdef  OLD_NCURSES
  68         wattrset (show_win,A_NORMAL);werase (show_win);
  69 #else
  70         wbkgdset (show_win,A_REVERSE);werase (show_win);
  71 #endif
  72         show_pad_info.line=0;show_pad_info.col=0;
  73         show_pad_info.display_lines=LINES-TITLE_WIN_LINES-SHOW_WIN_LINES-COMMAND_WIN_LINES-2;
  74         show_pad_info.display_cols=COLS;
  75         show_pad_info.max_line=show_pad_info.display_lines-1;show_pad_info.max_col=show_pad_info.display_cols-1;
  76         show_pad_info.disable_output=0;
  77
  78         scrollok (command_win,TRUE);
  79
  80         refresh_title_win ();refresh_show_win ();refresh_show_pad ();refresh_command_win ();
  81 }
  82
  83 void refresh_title_win (void)
  84
  85 {
  86         wrefresh (title_win);
  87 }
  88
  89 void refresh_show_win (void)
  90
  91 {
  92         int current_page,total_pages;
  93
  94         current_page=show_pad_info.line/show_pad_info.display_lines+1;
  95         if (show_pad_info.line%show_pad_info.display_lines)
  96                 current_page++;
  97         total_pages=show_pad_info.max_line/show_pad_info.display_lines+1;
  98
  99         wmove (show_win,2,COLS-18);
 100         wprintw (show_win,"Page %d of %d\n",current_page,total_pages);
 101
 102         wmove (show_win,2,COLS-18);
 103         wrefresh (show_win);
 104 }
 105
 106
 107 void refresh_show_pad (void)
 108
 109 {
 110         int left,top,right,bottom,i;
 111
 112         if (show_pad_info.disable_output)
 113                 return;
 114
 115         if (show_pad_info.max_line < show_pad_info.display_lines-1) {
 116                 for (i=show_pad_info.max_line+1;i<show_pad_info.display_lines;i++) {
 117                         wmove (show_pad,i,0);wprintw (show_pad,"\n");
 118                 }
 119         }
 120         left=0;right=show_pad_info.display_cols-1;
 121         top=TITLE_WIN_LINES+SHOW_WIN_LINES+1;bottom=top+show_pad_info.display_lines-1;
 122
 123         if (show_pad_info.line > show_pad_info.max_line-show_pad_info.display_lines+1)
 124                 show_pad_info.line=show_pad_info.max_line-show_pad_info.display_lines+1;
 125
 126         if (show_pad_info.line < 0)
 127                 show_pad_info.line=0;
 128
 129 #ifdef OLD_NCURSES
 130         prefresh (show_pad,show_pad_info.line,show_pad_info.col,top,left,show_pad_info.display_lines-1,show_pad_info.display_cols-1);
 131 #else
 132         prefresh (show_pad,show_pad_info.line,show_pad_info.col,top,left,top+show_pad_info.display_lines-1,left+show_pad_info.display_cols-1);
 133 #endif
 134 }
 135
 136 void refresh_command_win (void)
 137
 138 {
 139         wrefresh (command_win);
 140 }
 141
 142 void close_windows (void)
 143
 144 {
 145 //      echo ();
 146         tcsetattr(0,TCSANOW,&termioInit);
 147
 148         delwin (title_win);
 149         delwin (command_win);
 150         delwin (show_win);
 151         delwin (show_pad);
 152
 153         endwin ();
 154 }
 155
 156 void show_info (void)
 157
 158 {
 159         int block_num,block_offset;
 160
 161         block_num=device_offset/file_system_info.block_size;
 162         block_offset=device_offset%file_system_info.block_size;
 163
 164         wmove (show_win,0,0);
 165         wprintw (show_win,"Offset %-3ld in block %ld. ",block_offset,block_num);
 166         if (current_type != NULL)
 167                 wprintw (show_win,"Type: %s\n",current_type->name);
 168         else
 169                 wprintw (show_win,"Type: %s\n","none");
 170
 171         refresh_show_win ();
 172 }
 173
 174
 175 void redraw_all (void)
 176
 177 {
 178         close_windows ();
 179         init_windows ();
 180
 181         wmove (command_win,0,0);
 182         mvcur (-1,-1,LINES-COMMAND_WIN_LINES,0);
 183
 184 }