+++ /dev/null
-/*
- * tkStyle.c --
- *
- * This file implements the widget styles and themes support.
- *
- * Copyright (c) 1990-1993 The Regents of the University of California.
- * Copyright (c) 1994-1997 Sun Microsystems, Inc.
- *
- * See the file "license.terms" for information on usage and redistribution of
- * this file, and for a DISCLAIMER OF ALL WARRANTIES.
- */
-
-#include "tkInt.h"
-
-/*
- * The following structure is used to cache widget option specs matching an
- * element's required options defined by Tk_ElementOptionSpecs. It also holds
- * information behind Tk_StyledElement opaque tokens.
- */
-
-typedef struct StyledWidgetSpec {
- struct StyledElement *elementPtr;
- /* Pointer to the element holding this
- * structure. */
- Tk_OptionTable optionTable; /* Option table for the widget class using the
- * element. */
- const Tk_OptionSpec **optionsPtr;
- /* Table of option spec pointers, matching the
- * option list provided during element
- * registration. Malloc'd. */
-} StyledWidgetSpec;
-
-/*
- * Elements are declared using static templates. But static information must
- * be completed by dynamic information only accessible at runtime. For each
- * registered element, an instance of the following structure is stored in
- * each style engine and used to cache information about the widget types
- * (identified by their optionTable) that use the given element.
- */
-
-typedef struct StyledElement {
- struct Tk_ElementSpec *specPtr;
- /* Filled with template provided during
- * registration. NULL means no implementation
- * is available for the current engine. */
- int nbWidgetSpecs; /* Size of the array below. Number of distinct
- * widget classes (actually, distinct option
- * tables) that used the element so far. */
- StyledWidgetSpec *widgetSpecs;
- /* See above for the structure definition.
- * Table grows dynamically as new widgets use
- * the element. Malloc'd. */
-} StyledElement;
-
-/*
- * The following structure holds information behind Tk_StyleEngine opaque
- * tokens.
- */
-
-typedef struct StyleEngine {
- const char *name; /* Name of engine. Points to a hash key. */
- StyledElement *elements; /* Table of widget element descriptors. Each
- * element is indexed by a unique system-wide
- * ID. Table grows dynamically as new elements
- * are registered. Malloc'd. */
- struct StyleEngine *parentPtr;
- /* Parent engine. Engines may be layered to
- * form a fallback chain, terminated by the
- * default system engine. */
-} StyleEngine;
-
-/*
- * Styles are instances of style engines. The following structure holds
- * information behind Tk_Style opaque tokens.
- */
-
-typedef struct Style {
- const char *name; /* Name of style. Points to a hash key. */
- StyleEngine *enginePtr; /* Style engine of which the style is an
- * instance. */
- ClientData clientData; /* Data provided during registration. */
-} Style;
-
-/*
- * Each registered element uses an instance of the following structure.
- */
-
-typedef struct Element {
- const char *name; /* Name of element. Points to a hash key. */
- int id; /* Id of element. */
- int genericId; /* Id of generic element. */
- int created; /* Boolean, whether the element was created
- * explicitly (was registered) or implicitly
- * (by a derived element). */
-} Element;
-
-/*
- * Thread-local data.
- */
-
-typedef struct ThreadSpecificData {
- int nbInit; /* Number of calls to the init proc. */
- Tcl_HashTable engineTable; /* Map a name to a style engine. Keys are
- * strings, values are Tk_StyleEngine
- * pointers. */
- StyleEngine *defaultEnginePtr;
- /* Default, core-defined style engine. Global
- * fallback for all engines. */
- Tcl_HashTable styleTable; /* Map a name to a style. Keys are strings,
- * values are Tk_Style pointers.*/
- int nbElements; /* Size of the below tables. */
- Tcl_HashTable elementTable; /* Map a name to an element Id. Keys are
- * strings, values are integer element IDs. */
- Element *elements; /* Array of Elements. */
-} ThreadSpecificData;
-
-static Tcl_ThreadDataKey dataKey;
-
-/*
- * Forward declarations for functions defined later in this file:
- */
-
-static int CreateElement(const char *name, int create);
-static void DupStyleObjProc(Tcl_Obj *srcObjPtr,
- Tcl_Obj *dupObjPtr);
-static void FreeElement(Element *elementPtr);
-static void FreeStyledElement(StyledElement *elementPtr);
-static void FreeStyleEngine(StyleEngine *enginePtr);
-static void FreeStyleObjProc(Tcl_Obj *objPtr);
-static void FreeWidgetSpec(StyledWidgetSpec *widgetSpecPtr);
-static StyledElement * GetStyledElement(StyleEngine *enginePtr,
- int elementId);
-static StyledWidgetSpec*GetWidgetSpec(StyledElement *elementPtr,
- Tk_OptionTable optionTable);
-static void InitElement(Element *elementPtr, const char *name,
- int id, int genericId, int created);
-static void InitStyle(Style *stylePtr, const char *name,
- StyleEngine *enginePtr, ClientData clientData);
-static void InitStyledElement(StyledElement *elementPtr);
-static void InitStyleEngine(StyleEngine *enginePtr,
- const char *name, StyleEngine *parentPtr);
-static void InitWidgetSpec(StyledWidgetSpec *widgetSpecPtr,
- StyledElement *elementPtr,
- Tk_OptionTable optionTable);
-static int SetStyleFromAny(Tcl_Interp *interp, Tcl_Obj *objPtr);
-
-/*
- * The following structure defines the implementation of the "style" Tcl
- * object, used for drawing. The internalRep.twoPtrValue.ptr1 field of each
- * style object points to the Style structure for the stylefont, or NULL.
- */
-
-static const Tcl_ObjType styleObjType = {
- "style", /* name */
- FreeStyleObjProc, /* freeIntRepProc */
- DupStyleObjProc, /* dupIntRepProc */
- NULL, /* updateStringProc */
- SetStyleFromAny /* setFromAnyProc */
-};
-\f
-/*
- *---------------------------------------------------------------------------
- *
- * TkStylePkgInit --
- *
- * This function is called when an application is created. It initializes
- * all the structures that are used by the style package on a per
- * application basis.
- *
- * Results:
- * Stores data in thread-local storage.
- *
- * Side effects:
- * Memory allocated.
- *
- *---------------------------------------------------------------------------
- */
-
-void
-TkStylePkgInit(
- TkMainInfo *mainPtr) /* The application being created. */
-{
- ThreadSpecificData *tsdPtr =
- Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
-
- if (tsdPtr->nbInit != 0) {
- return;
- }
-
- /*
- * Initialize tables.
- */
-
- Tcl_InitHashTable(&tsdPtr->engineTable, TCL_STRING_KEYS);
- Tcl_InitHashTable(&tsdPtr->styleTable, TCL_STRING_KEYS);
- Tcl_InitHashTable(&tsdPtr->elementTable, TCL_STRING_KEYS);
- tsdPtr->nbElements = 0;
- tsdPtr->elements = NULL;
-
- /*
- * Create the default system engine.
- */
-
- tsdPtr->defaultEnginePtr = (StyleEngine *)
- Tk_RegisterStyleEngine(NULL, NULL);
-
- /*
- * Create the default system style.
- */
-
- Tk_CreateStyle(NULL, (Tk_StyleEngine) tsdPtr->defaultEnginePtr, NULL);
-
- tsdPtr->nbInit++;
-}
-\f
-/*
- *---------------------------------------------------------------------------
- *
- * TkStylePkgFree --
- *
- * This function is called when an application is deleted. It deletes all
- * the structures that were used by the style package for this
- * application.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Memory freed.
- *
- *---------------------------------------------------------------------------
- */
-
-void
-TkStylePkgFree(
- TkMainInfo *mainPtr) /* The application being deleted. */
-{
- ThreadSpecificData *tsdPtr =
- Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
- Tcl_HashSearch search;
- Tcl_HashEntry *entryPtr;
- StyleEngine *enginePtr;
- int i;
-
- tsdPtr->nbInit--;
- if (tsdPtr->nbInit != 0) {
- return;
- }
-
- /*
- * Free styles.
- */
-
- entryPtr = Tcl_FirstHashEntry(&tsdPtr->styleTable, &search);
- while (entryPtr != NULL) {
- ckfree(Tcl_GetHashValue(entryPtr));
- entryPtr = Tcl_NextHashEntry(&search);
- }
- Tcl_DeleteHashTable(&tsdPtr->styleTable);
-
- /*
- * Free engines.
- */
-
- entryPtr = Tcl_FirstHashEntry(&tsdPtr->engineTable, &search);
- while (entryPtr != NULL) {
- enginePtr = Tcl_GetHashValue(entryPtr);
- FreeStyleEngine(enginePtr);
- ckfree(enginePtr);
- entryPtr = Tcl_NextHashEntry(&search);
- }
- Tcl_DeleteHashTable(&tsdPtr->engineTable);
-
- /*
- * Free elements.
- */
-
- for (i = 0; i < tsdPtr->nbElements; i++) {
- FreeElement(tsdPtr->elements+i);
- }
- Tcl_DeleteHashTable(&tsdPtr->elementTable);
- ckfree(tsdPtr->elements);
-}
-\f
-/*
- *---------------------------------------------------------------------------
- *
- * Tk_RegisterStyleEngine --
- *
- * This function is called to register a new style engine. Style engines
- * are stored in thread-local space.
- *
- * Results:
- * The newly allocated engine, or NULL if an engine with the same name
- * exists.
- *
- * Side effects:
- * Memory allocated. Data added to thread-local table.
- *
- *---------------------------------------------------------------------------
- */
-
-Tk_StyleEngine
-Tk_RegisterStyleEngine(
- const char *name, /* Name of the engine to create. NULL or empty
- * means the default system engine. */
- Tk_StyleEngine parent) /* The engine's parent. NULL means the default
- * system engine. */
-{
- ThreadSpecificData *tsdPtr =
- Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
- Tcl_HashEntry *entryPtr;
- int newEntry;
- StyleEngine *enginePtr;
-
- /*
- * Attempt to create a new entry in the engine table.
- */
-
- entryPtr = Tcl_CreateHashEntry(&tsdPtr->engineTable,
- (name != NULL ? name : ""), &newEntry);
- if (!newEntry) {
- /*
- * An engine was already registered by that name.
- */
-
- return NULL;
- }
-
- /*
- * Allocate and intitialize a new engine.
- */
-
- enginePtr = ckalloc(sizeof(StyleEngine));
- InitStyleEngine(enginePtr, Tcl_GetHashKey(&tsdPtr->engineTable, entryPtr),
- (StyleEngine *) parent);
- Tcl_SetHashValue(entryPtr, enginePtr);
-
- return (Tk_StyleEngine) enginePtr;
-}
-\f
-/*
- *---------------------------------------------------------------------------
- *
- * InitStyleEngine --
- *
- * Initialize a newly allocated style engine.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Memory allocated.
- *
- *---------------------------------------------------------------------------
- */
-
-static void
-InitStyleEngine(
- StyleEngine *enginePtr, /* Points to an uninitialized engine. */
- const char *name, /* Name of the registered engine. NULL or empty
- * means the default system engine. Usually
- * points to the hash key. */
- StyleEngine *parentPtr) /* The engine's parent. NULL means the default
- * system engine. */
-{
- ThreadSpecificData *tsdPtr =
- Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
- int elementId;
-
- if (name == NULL || *name == '\0') {
- /*
- * This is the default style engine.
- */
-
- enginePtr->parentPtr = NULL;
- } else if (parentPtr == NULL) {
- /*
- * The default style engine is the parent.
- */
-
- enginePtr->parentPtr = tsdPtr->defaultEnginePtr;
- } else {
- enginePtr->parentPtr = parentPtr;
- }
-
- /*
- * Allocate and initialize elements array.
- */
-
- if (tsdPtr->nbElements > 0) {
- enginePtr->elements = ckalloc(
- sizeof(StyledElement) * tsdPtr->nbElements);
- for (elementId = 0; elementId < tsdPtr->nbElements; elementId++) {
- InitStyledElement(enginePtr->elements+elementId);
- }
- } else {
- enginePtr->elements = NULL;
- }
-}
-\f
-/*
- *---------------------------------------------------------------------------
- *
- * FreeStyleEngine --
- *
- * Free an engine and its associated data.
- *
- * Results:
- * None
- *
- * Side effects:
- * Memory freed.
- *
- *---------------------------------------------------------------------------
- */
-
-static void
-FreeStyleEngine(
- StyleEngine *enginePtr) /* The style engine to free. */
-{
- ThreadSpecificData *tsdPtr =
- Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
- int elementId;
-
- /*
- * Free allocated elements.
- */
-
- for (elementId = 0; elementId < tsdPtr->nbElements; elementId++) {
- FreeStyledElement(enginePtr->elements+elementId);
- }
- ckfree(enginePtr->elements);
-}
-\f
-/*
- *---------------------------------------------------------------------------
- *
- * Tk_GetStyleEngine --
- *
- * Retrieve a registered style engine by its name.
- *
- * Results:
- * A pointer to the style engine, or NULL if none found.
- *
- * Side effects:
- * None.
- *
- *---------------------------------------------------------------------------
- */
-
-Tk_StyleEngine
-Tk_GetStyleEngine(
- const char *name) /* Name of the engine to retrieve. NULL or
- * empty means the default system engine. */
-{
- ThreadSpecificData *tsdPtr =
- Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
- Tcl_HashEntry *entryPtr;
-
- if (name == NULL) {
- return (Tk_StyleEngine) tsdPtr->defaultEnginePtr;
- }
-
- entryPtr = Tcl_FindHashEntry(&tsdPtr->engineTable, (name!=NULL?name:""));
- if (!entryPtr) {
- return NULL;
- }
-
- return Tcl_GetHashValue(entryPtr);
-}
-\f
-/*
- *---------------------------------------------------------------------------
- *
- * InitElement --
- *
- * Initialize a newly allocated element.
- *
- * Results:
- * None.
- *
- * Side effects:
- * None.
- *
- *---------------------------------------------------------------------------
- */
-
-static void
-InitElement(
- Element *elementPtr, /* Points to an uninitialized element.*/
- const char *name, /* Name of the registered element. Usually
- * points to the hash key. */
- int id, /* Unique element ID. */
- int genericId, /* ID of generic element. -1 means none. */
- int created) /* Boolean, whether the element was created
- * explicitly (was registered) or implicitly
- * (by a derived element). */
-{
- elementPtr->name = name;
- elementPtr->id = id;
- elementPtr->genericId = genericId;
- elementPtr->created = (created?1:0);
-}
-\f
-/*
- *---------------------------------------------------------------------------
- *
- * FreeElement --
- *
- * Free an element and its associated data.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Memory freed.
- *
- *---------------------------------------------------------------------------
- */
-
-static void
-FreeElement(
- Element *elementPtr) /* The element to free. */
-{
- /* Nothing to do. */
-}
-\f
-/*
- *---------------------------------------------------------------------------
- *
- * InitStyledElement --
- *
- * Initialize a newly allocated styled element.
- *
- * Results:
- * None.
- *
- * Side effects:
- * None.
- *
- *---------------------------------------------------------------------------
- */
-
-static void
-InitStyledElement(
- StyledElement *elementPtr) /* Points to an uninitialized element.*/
-{
- memset(elementPtr, 0, sizeof(StyledElement));
-}
-\f
-/*
- *---------------------------------------------------------------------------
- *
- * FreeStyledElement --
- *
- * Free a styled element and its associated data.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Memory freed.
- *
- *---------------------------------------------------------------------------
- */
-
-static void
-FreeStyledElement(
- StyledElement *elementPtr) /* The styled element to free. */
-{
- int i;
-
- /*
- * Free allocated widget specs.
- */
-
- for (i = 0; i < elementPtr->nbWidgetSpecs; i++) {
- FreeWidgetSpec(elementPtr->widgetSpecs+i);
- }
- ckfree(elementPtr->widgetSpecs);
-}
-\f
-/*
- *---------------------------------------------------------------------------
- *
- * CreateElement --
- *
- * Find an existing or create a new element.
- *
- * Results:
- * The unique ID for the created or found element.
- *
- * Side effects:
- * Memory allocated.
- *
- *---------------------------------------------------------------------------
- */
-
-static int
-CreateElement(
- const char *name, /* Name of the element. */
- int create) /* Boolean, whether the element is being
- * created explicitly (being registered) or
- * implicitly (by a derived element). */
-{
- ThreadSpecificData *tsdPtr =
- Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
- Tcl_HashEntry *entryPtr, *engineEntryPtr;
- Tcl_HashSearch search;
- int newEntry, elementId, genericId = -1;
- char *dot;
- StyleEngine *enginePtr;
-
- /*
- * Find or create the element.
- */
-
- entryPtr = Tcl_CreateHashEntry(&tsdPtr->elementTable, name, &newEntry);
- if (!newEntry) {
- elementId = PTR2INT(Tcl_GetHashValue(entryPtr));
- if (create) {
- tsdPtr->elements[elementId].created = 1;
- }
- return elementId;
- }
-
- /*
- * The element didn't exist. If it's a derived element, find or create its
- * generic element ID.
- */
-
- dot = strchr(name, '.');
- if (dot) {
- genericId = CreateElement(dot+1, 0);
- }
-
- elementId = tsdPtr->nbElements++;
- Tcl_SetHashValue(entryPtr, INT2PTR(elementId));
-
- /*
- * Reallocate element table.
- */
-
- tsdPtr->elements = ckrealloc(tsdPtr->elements,
- sizeof(Element) * tsdPtr->nbElements);
- InitElement(tsdPtr->elements+elementId,
- Tcl_GetHashKey(&tsdPtr->elementTable, entryPtr), elementId,
- genericId, create);
-
- /*
- * Reallocate style engines' element table.
- */
-
- engineEntryPtr = Tcl_FirstHashEntry(&tsdPtr->engineTable, &search);
- while (engineEntryPtr != NULL) {
- enginePtr = Tcl_GetHashValue(engineEntryPtr);
-
- enginePtr->elements = ckrealloc(enginePtr->elements,
- sizeof(StyledElement) * tsdPtr->nbElements);
- InitStyledElement(enginePtr->elements+elementId);
-
- engineEntryPtr = Tcl_NextHashEntry(&search);
- }
-
- return elementId;
-}
-\f
-/*
- *---------------------------------------------------------------------------
- *
- * Tk_GetElementId --
- *
- * Find an existing element.
- *
- * Results:
- * The unique ID for the found element, or -1 if not found.
- *
- * Side effects:
- * Generic elements may be created.
- *
- *---------------------------------------------------------------------------
- */
-
-int
-Tk_GetElementId(
- const char *name) /* Name of the element. */
-{
- ThreadSpecificData *tsdPtr =
- Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
- Tcl_HashEntry *entryPtr;
- int genericId = -1;
- char *dot;
-
- /*
- * Find the element Id.
- */
-
- entryPtr = Tcl_FindHashEntry(&tsdPtr->elementTable, name);
- if (entryPtr) {
- return PTR2INT(Tcl_GetHashValue(entryPtr));
- }
-
- /*
- * Element not found. If the given name was derived, then first search for
- * the generic element. If found, create the new derived element.
- */
-
- dot = strchr(name, '.');
- if (!dot) {
- return -1;
- }
- genericId = Tk_GetElementId(dot+1);
- if (genericId == -1) {
- return -1;
- }
- if (!tsdPtr->elements[genericId].created) {
- /*
- * The generic element was created implicitly and thus has no real
- * existence.
- */
-
- return -1;
- } else {
- /*
- * The generic element was created explicitly. Create the derived
- * element.
- */
-
- return CreateElement(name, 1);
- }
-}
-\f
-/*
- *---------------------------------------------------------------------------
- *
- * Tk_RegisterStyledElement --
- *
- * Register an implementation of a new or existing element for the given
- * style engine.
- *
- * Results:
- * The unique ID for the created or found element.
- *
- * Side effects:
- * Elements may be created. Memory allocated.
- *
- *---------------------------------------------------------------------------
- */
-
-int
-Tk_RegisterStyledElement(
- Tk_StyleEngine engine, /* Style engine providing the
- * implementation. */
- Tk_ElementSpec *templatePtr)/* Static template information about the
- * element. */
-{
- int elementId;
- StyledElement *elementPtr;
- Tk_ElementSpec *specPtr;
- int nbOptions;
- register Tk_ElementOptionSpec *srcOptions, *dstOptions;
-
- if (templatePtr->version != TK_STYLE_VERSION_1) {
- /*
- * Version mismatch. Do nothing.
- */
-
- return -1;
- }
-
- if (engine == NULL) {
- engine = Tk_GetStyleEngine(NULL);
- }
-
- /*
- * Register the element, allocating storage in the various engines if
- * necessary.
- */
-
- elementId = CreateElement(templatePtr->name, 1);
-
- /*
- * Initialize the styled element.
- */
-
- elementPtr = ((StyleEngine *) engine)->elements+elementId;
-
- specPtr = ckalloc(sizeof(Tk_ElementSpec));
- specPtr->version = templatePtr->version;
- specPtr->name = ckalloc(strlen(templatePtr->name)+1);
- strcpy(specPtr->name, templatePtr->name);
- nbOptions = 0;
- for (nbOptions = 0, srcOptions = templatePtr->options;
- srcOptions->name != NULL; nbOptions++, srcOptions++) {
- /* empty body */
- }
- specPtr->options =
- ckalloc(sizeof(Tk_ElementOptionSpec) * (nbOptions+1));
- for (srcOptions = templatePtr->options, dstOptions = specPtr->options;
- /* End condition within loop */; srcOptions++, dstOptions++) {
- if (srcOptions->name == NULL) {
- dstOptions->name = NULL;
- break;
- }
-
- dstOptions->name = ckalloc(strlen(srcOptions->name)+1);
- strcpy(dstOptions->name, srcOptions->name);
- dstOptions->type = srcOptions->type;
- }
- specPtr->getSize = templatePtr->getSize;
- specPtr->getBox = templatePtr->getBox;
- specPtr->getBorderWidth = templatePtr->getBorderWidth;
- specPtr->draw = templatePtr->draw;
-
- elementPtr->specPtr = specPtr;
- elementPtr->nbWidgetSpecs = 0;
- elementPtr->widgetSpecs = NULL;
-
- return elementId;
-}
-\f
-/*
- *---------------------------------------------------------------------------
- *
- * GetStyledElement --
- *
- * Get a registered implementation of an existing element for the given
- * style engine.
- *
- * Results:
- * The styled element descriptor, or NULL if not found.
- *
- * Side effects:
- * None.
- *
- *---------------------------------------------------------------------------
- */
-
-static StyledElement *
-GetStyledElement(
- StyleEngine *enginePtr, /* Style engine providing the implementation.
- * NULL means the default system engine. */
- int elementId) /* Unique element ID */
-{
- StyledElement *elementPtr;
- ThreadSpecificData *tsdPtr =
- Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
- StyleEngine *enginePtr2;
-
- if (enginePtr == NULL) {
- enginePtr = tsdPtr->defaultEnginePtr;
- }
-
- while (elementId >= 0 && elementId < tsdPtr->nbElements) {
- /*
- * Look for an implemented element through the engine chain.
- */
-
- enginePtr2 = enginePtr;
- do {
- elementPtr = enginePtr2->elements+elementId;
- if (elementPtr->specPtr != NULL) {
- return elementPtr;
- }
- enginePtr2 = enginePtr2->parentPtr;
- } while (enginePtr2 != NULL);
-
- /*
- * None found, try with the generic element.
- */
-
- elementId = tsdPtr->elements[elementId].genericId;
- }
-
- /*
- * No matching element found.
- */
-
- return NULL;
-}
-\f
-/*
- *---------------------------------------------------------------------------
- *
- * InitWidgetSpec --
- *
- * Initialize a newly allocated widget spec.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Memory allocated.
- *
- *---------------------------------------------------------------------------
- */
-
-static void
-InitWidgetSpec(
- StyledWidgetSpec *widgetSpecPtr,
- /* Points to an uninitialized widget spec. */
- StyledElement *elementPtr, /* Styled element descriptor. */
- Tk_OptionTable optionTable) /* The widget's option table. */
-{
- int i, nbOptions;
- Tk_ElementOptionSpec *elementOptionPtr;
- const Tk_OptionSpec *widgetOptionPtr;
-
- widgetSpecPtr->elementPtr = elementPtr;
- widgetSpecPtr->optionTable = optionTable;
-
- /*
- * Count the number of options.
- */
-
- for (nbOptions = 0, elementOptionPtr = elementPtr->specPtr->options;
- elementOptionPtr->name != NULL; nbOptions++, elementOptionPtr++) {
- /* empty body */
- }
-
- /*
- * Build the widget option list.
- */
-
- widgetSpecPtr->optionsPtr =
- ckalloc(sizeof(Tk_OptionSpec *) * nbOptions);
- for (i = 0, elementOptionPtr = elementPtr->specPtr->options;
- i < nbOptions; i++, elementOptionPtr++) {
- widgetOptionPtr = TkGetOptionSpec(elementOptionPtr->name, optionTable);
-
- /*
- * Check that the widget option type is compatible with one of the
- * element's required types.
- */
-
- if (elementOptionPtr->type == TK_OPTION_END
- || elementOptionPtr->type == widgetOptionPtr->type) {
- widgetSpecPtr->optionsPtr[i] = widgetOptionPtr;
- } else {
- widgetSpecPtr->optionsPtr[i] = NULL;
- }
- }
-}
-\f
-/*
- *---------------------------------------------------------------------------
- *
- * FreeWidgetSpec --
- *
- * Free a widget spec and its associated data.
- *
- * Results:
- * None
- *
- * Side effects:
- * Memory freed.
- *
- *---------------------------------------------------------------------------
- */
-
-static void
-FreeWidgetSpec(
- StyledWidgetSpec *widgetSpecPtr)
- /* The widget spec to free. */
-{
- ckfree(widgetSpecPtr->optionsPtr);
-}
-\f
-/*
- *---------------------------------------------------------------------------
- *
- * GetWidgetSpec --
- *
- * Return a new or existing widget spec for the given element and widget
- * type (identified by its option table).
- *
- * Results:
- * A pointer to the matching widget spec.
- *
- * Side effects:
- * Memory may be allocated.
- *
- *---------------------------------------------------------------------------
- */
-
-static StyledWidgetSpec *
-GetWidgetSpec(
- StyledElement *elementPtr, /* Styled element descriptor. */
- Tk_OptionTable optionTable) /* The widget's option table. */
-{
- StyledWidgetSpec *widgetSpecPtr;
- int i;
-
- /*
- * Try to find an existing widget spec.
- */
-
- for (i = 0; i < elementPtr->nbWidgetSpecs; i++) {
- widgetSpecPtr = elementPtr->widgetSpecs+i;
- if (widgetSpecPtr->optionTable == optionTable) {
- return widgetSpecPtr;
- }
- }
-
- /*
- * Create and initialize a new widget spec.
- */
-
- i = elementPtr->nbWidgetSpecs++;
- elementPtr->widgetSpecs = ckrealloc(elementPtr->widgetSpecs,
- sizeof(StyledWidgetSpec) * elementPtr->nbWidgetSpecs);
- widgetSpecPtr = elementPtr->widgetSpecs+i;
- InitWidgetSpec(widgetSpecPtr, elementPtr, optionTable);
-
- return widgetSpecPtr;
-}
-\f
-/*
- *---------------------------------------------------------------------------
- *
- * Tk_GetStyledElement --
- *
- * This function returns a styled instance of the given element.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Cached data may be allocated or updated.
- *
- *---------------------------------------------------------------------------
- */
-
-Tk_StyledElement
-Tk_GetStyledElement(
- Tk_Style style, /* The widget style. */
- int elementId, /* Unique element ID. */
- Tk_OptionTable optionTable) /* Option table for the widget. */
-{
- Style *stylePtr = (Style *) style;
- StyledElement *elementPtr;
-
- /*
- * Get an element implementation and call corresponding hook.
- */
-
- elementPtr = GetStyledElement((stylePtr?stylePtr->enginePtr:NULL),
- elementId);
- if (!elementPtr) {
- return NULL;
- }
-
- return (Tk_StyledElement) GetWidgetSpec(elementPtr, optionTable);
-}
-\f
-/*
- *---------------------------------------------------------------------------
- *
- * Tk_GetElementSize --
- *
- * This function computes the size of the given widget element according
- * to its style.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Cached data may be allocated or updated.
- *
- *---------------------------------------------------------------------------
- */
-
-void
-Tk_GetElementSize(
- Tk_Style style, /* The widget style. */
- Tk_StyledElement element, /* The styled element, previously returned by
- * Tk_GetStyledElement. */
- char *recordPtr, /* The widget record. */
- Tk_Window tkwin, /* The widget window. */
- int width, int height, /* Requested size. */
- int inner, /* If TRUE, compute the outer size according
- * to the requested minimum inner size. If
- * FALSE, compute the inner size according to
- * the requested maximum outer size. */
- int *widthPtr, int *heightPtr)
- /* Returned size. */
-{
- Style *stylePtr = (Style *) style;
- StyledWidgetSpec *widgetSpecPtr = (StyledWidgetSpec *) element;
-
- widgetSpecPtr->elementPtr->specPtr->getSize(stylePtr->clientData,
- recordPtr, widgetSpecPtr->optionsPtr, tkwin, width, height, inner,
- widthPtr, heightPtr);
-}
-\f
-/*
- *---------------------------------------------------------------------------
- *
- * Tk_GetElementBox --
- *
- * This function computes the bounding or inscribed box coordinates of
- * the given widget element according to its style and within the given
- * limits.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Cached data may be allocated or updated.
- *
- *---------------------------------------------------------------------------
- */
-
-void
-Tk_GetElementBox(
- Tk_Style style, /* The widget style. */
- Tk_StyledElement element, /* The styled element, previously returned by
- * Tk_GetStyledElement. */
- char *recordPtr, /* The widget record. */
- Tk_Window tkwin, /* The widget window. */
- int x, int y, /* Top left corner of available area. */
- int width, int height, /* Size of available area. */
- int inner, /* Boolean. If TRUE, compute the bounding box
- * according to the requested inscribed box
- * size. If FALSE, compute the inscribed box
- * according to the requested bounding box. */
- int *xPtr, int *yPtr, /* Returned top left corner. */
- int *widthPtr, int *heightPtr)
- /* Returned size. */
-{
- Style *stylePtr = (Style *) style;
- StyledWidgetSpec *widgetSpecPtr = (StyledWidgetSpec *) element;
-
- widgetSpecPtr->elementPtr->specPtr->getBox(stylePtr->clientData,
- recordPtr, widgetSpecPtr->optionsPtr, tkwin, x, y, width, height,
- inner, xPtr, yPtr, widthPtr, heightPtr);
-}
-\f
-/*
- *---------------------------------------------------------------------------
- *
- * Tk_GetElementBorderWidth --
- *
- * This function computes the border widthof the given widget element
- * according to its style and within the given limits.
- *
- * Results:
- * Border width in pixels. This value is uniform for all four sides.
- *
- * Side effects:
- * Cached data may be allocated or updated.
- *
- *---------------------------------------------------------------------------
- */
-
-int
-Tk_GetElementBorderWidth(
- Tk_Style style, /* The widget style. */
- Tk_StyledElement element, /* The styled element, previously returned by
- * Tk_GetStyledElement. */
- char *recordPtr, /* The widget record. */
- Tk_Window tkwin) /* The widget window. */
-{
- Style *stylePtr = (Style *) style;
- StyledWidgetSpec *widgetSpecPtr = (StyledWidgetSpec *) element;
-
- return widgetSpecPtr->elementPtr->specPtr->getBorderWidth(
- stylePtr->clientData, recordPtr, widgetSpecPtr->optionsPtr, tkwin);
-}
-\f
-/*
- *---------------------------------------------------------------------------
- *
- * Tk_DrawElement --
- *
- * This function draw the given widget element in a given drawable area.
- *
- * Results:
- * None
- *
- * Side effects:
- * Cached data may be allocated or updated.
- *
- *---------------------------------------------------------------------------
- */
-
-void
-Tk_DrawElement(
- Tk_Style style, /* The widget style. */
- Tk_StyledElement element, /* The styled element, previously returned by
- * Tk_GetStyledElement. */
- char *recordPtr, /* The widget record. */
- Tk_Window tkwin, /* The widget window. */
- Drawable d, /* Where to draw element. */
- int x, int y, /* Top left corner of element. */
- int width, int height, /* Size of element. */
- int state) /* Drawing state flags. */
-{
- Style *stylePtr = (Style *) style;
- StyledWidgetSpec *widgetSpecPtr = (StyledWidgetSpec *) element;
-
- widgetSpecPtr->elementPtr->specPtr->draw(stylePtr->clientData,
- recordPtr, widgetSpecPtr->optionsPtr, tkwin, d, x, y, width,
- height, state);
-}
-\f
-/*
- *---------------------------------------------------------------------------
- *
- * Tk_CreateStyle --
- *
- * This function is called to create a new style as an instance of the
- * given engine. Styles are stored in thread-local space.
- *
- * Results:
- * The newly allocated style, or NULL if the style already exists.
- *
- * Side effects:
- * Memory allocated. Data added to thread-local table.
- *
- *---------------------------------------------------------------------------
- */
-
-Tk_Style
-Tk_CreateStyle(
- const char *name, /* Name of the style to create. NULL or empty
- * means the default system style. */
- Tk_StyleEngine engine, /* The style engine. */
- ClientData clientData) /* Private data passed as is to engine code. */
-{
- ThreadSpecificData *tsdPtr =
- Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
- Tcl_HashEntry *entryPtr;
- int newEntry;
- Style *stylePtr;
-
- /*
- * Attempt to create a new entry in the style table.
- */
-
- entryPtr = Tcl_CreateHashEntry(&tsdPtr->styleTable, (name?name:""),
- &newEntry);
- if (!newEntry) {
- /*
- * A style was already registered by that name.
- */
-
- return NULL;
- }
-
- /*
- * Allocate and intitialize a new style.
- */
-
- stylePtr = ckalloc(sizeof(Style));
- InitStyle(stylePtr, Tcl_GetHashKey(&tsdPtr->styleTable, entryPtr),
- (engine!=NULL ? (StyleEngine*) engine : tsdPtr->defaultEnginePtr),
- clientData);
- Tcl_SetHashValue(entryPtr, stylePtr);
-
- return (Tk_Style) stylePtr;
-}
-\f
-/*
- *---------------------------------------------------------------------------
- *
- * Tk_NameOfStyle --
- *
- * Given a style, return its registered name.
- *
- * Results:
- * The return value is the name that was passed to Tk_CreateStyle() to
- * create the style. The storage for the returned string is private (it
- * points to the corresponding hash key) The caller should not modify
- * this string.
- *
- * Side effects:
- * None.
- *
- *---------------------------------------------------------------------------
- */
-
-const char *
-Tk_NameOfStyle(
- Tk_Style style) /* Style whose name is desired. */
-{
- Style *stylePtr = (Style *) style;
-
- return stylePtr->name;
-}
-\f
-/*
- *---------------------------------------------------------------------------
- *
- * InitStyle --
- *
- * Initialize a newly allocated style.
- *
- * Results:
- * None.
- *
- * Side effects:
- * None.
- *
- *---------------------------------------------------------------------------
- */
-
-static void
-InitStyle(
- Style *stylePtr, /* Points to an uninitialized style. */
- const char *name, /* Name of the registered style. NULL or empty
- * means the default system style. Usually
- * points to the hash key. */
- StyleEngine *enginePtr, /* The style engine. */
- ClientData clientData) /* Private data passed as is to engine code. */
-{
- stylePtr->name = name;
- stylePtr->enginePtr = enginePtr;
- stylePtr->clientData = clientData;
-}
-\f
-/*
- *---------------------------------------------------------------------------
- *
- * Tk_GetStyle --
- *
- * Retrieve a registered style by its name.
- *
- * Results:
- * A pointer to the style engine, or NULL if none found. In the latter
- * case and if the interp is not NULL, an error message is left in the
- * interp's result.
- *
- * Side effects:
- * None.
- *
- *---------------------------------------------------------------------------
- */
-
-Tk_Style
-Tk_GetStyle(
- Tcl_Interp *interp, /* Interp for error return. */
- const char *name) /* Name of the style to retrieve. NULL or empty
- * means the default system style. */
-{
- ThreadSpecificData *tsdPtr =
- Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
- Tcl_HashEntry *entryPtr;
- Style *stylePtr;
-
- /*
- * Search for a corresponding entry in the style table.
- */
-
- entryPtr = Tcl_FindHashEntry(&tsdPtr->styleTable, (name!=NULL?name:""));
- if (entryPtr == NULL) {
- if (interp != NULL) {
- Tcl_SetObjResult(interp, Tcl_ObjPrintf(
- "style \"%s\" doesn't exist", name));
- Tcl_SetErrorCode(interp, "TK", "LOOKUP", "STYLE", name, NULL);
- }
- return (Tk_Style) NULL;
- }
- stylePtr = Tcl_GetHashValue(entryPtr);
-
- return (Tk_Style) stylePtr;
-}
-\f
-/*
- *---------------------------------------------------------------------------
- *
- * Tk_FreeStyle --
- *
- * No-op. Present only for stubs compatibility.
- *
- *---------------------------------------------------------------------------
- */
-
-void
-Tk_FreeStyle(
- Tk_Style style)
-{
-}
-\f
-/*
- *---------------------------------------------------------------------------
- *
- * Tk_AllocStyleFromObj --
- *
- * Map the string name of a style to a corresponding Tk_Style. The style
- * must have already been created by Tk_CreateStyle.
- *
- * Results:
- * The return value is a token for the style that matches objPtr, or NULL
- * if none found. If NULL is returned, an error message will be left in
- * interp's result object.
- *
- *---------------------------------------------------------------------------
- */
-
-Tk_Style
-Tk_AllocStyleFromObj(
- Tcl_Interp *interp, /* Interp for error return. */
- Tcl_Obj *objPtr) /* Object containing name of the style to
- * retrieve. */
-{
- Style *stylePtr;
-
- if (objPtr->typePtr != &styleObjType) {
- SetStyleFromAny(interp, objPtr);
- }
- stylePtr = objPtr->internalRep.twoPtrValue.ptr1;
-
- return (Tk_Style) stylePtr;
-}
-\f
-/*
- *----------------------------------------------------------------------
- *
- * Tk_GetStyleFromObj --
- *
- * Find the style that corresponds to a given object. The style must have
- * already been created by Tk_CreateStyle.
- *
- * Results:
- * The return value is a token for the style that matches objPtr, or NULL
- * if none found.
- *
- * Side effects:
- * If the object is not already a style ref, the conversion will free any
- * old internal representation.
- *
- *----------------------------------------------------------------------
- */
-
-Tk_Style
-Tk_GetStyleFromObj(
- Tcl_Obj *objPtr) /* The object from which to get the style. */
-{
- if (objPtr->typePtr != &styleObjType) {
- SetStyleFromAny(NULL, objPtr);
- }
-
- return objPtr->internalRep.twoPtrValue.ptr1;
-}
-\f
-/*
- *---------------------------------------------------------------------------
- *
- * Tk_FreeStyleFromObj --
- *
- * No-op. Present only for stubs compatibility.
- *
- *---------------------------------------------------------------------------
- */
-void
-Tk_FreeStyleFromObj(
- Tcl_Obj *objPtr)
-{
-}
-\f
-/*
- *----------------------------------------------------------------------
- *
- * SetStyleFromAny --
- *
- * Convert the internal representation of a Tcl object to the style
- * internal form.
- *
- * Results:
- * Always returns TCL_OK. If an error occurs is returned (e.g. the style
- * doesn't exist), an error message will be left in interp's result.
- *
- * Side effects:
- * The object is left with its typePtr pointing to styleObjType.
- *
- *----------------------------------------------------------------------
- */
-
-static int
-SetStyleFromAny(
- Tcl_Interp *interp, /* Used for error reporting if not NULL. */
- Tcl_Obj *objPtr) /* The object to convert. */
-{
- const Tcl_ObjType *typePtr;
- const char *name;
-
- /*
- * Free the old internalRep before setting the new one.
- */
-
- name = Tcl_GetString(objPtr);
- typePtr = objPtr->typePtr;
- if ((typePtr != NULL) && (typePtr->freeIntRepProc != NULL)) {
- typePtr->freeIntRepProc(objPtr);
- }
-
- objPtr->typePtr = &styleObjType;
- objPtr->internalRep.twoPtrValue.ptr1 = Tk_GetStyle(interp, name);
-
- return TCL_OK;
-}
-\f
-/*
- *---------------------------------------------------------------------------
- *
- * FreeStyleObjProc --
- *
- * This proc is called to release an object reference to a style. Called
- * when the object's internal rep is released.
- *
- * Results:
- * None.
- *
- *---------------------------------------------------------------------------
- */
-
-static void
-FreeStyleObjProc(
- Tcl_Obj *objPtr) /* The object we are releasing. */
-{
- objPtr->internalRep.twoPtrValue.ptr1 = NULL;
- objPtr->typePtr = NULL;
-}
-\f
-/*
- *---------------------------------------------------------------------------
- *
- * DupStyleObjProc --
- *
- * When a cached style object is duplicated, this is called to update the
- * internal reps.
- *
- *---------------------------------------------------------------------------
- */
-
-static void
-DupStyleObjProc(
- Tcl_Obj *srcObjPtr, /* The object we are copying from. */
- Tcl_Obj *dupObjPtr) /* The object we are copying to. */
-{
- dupObjPtr->typePtr = srcObjPtr->typePtr;
- dupObjPtr->internalRep.twoPtrValue.ptr1 =
- srcObjPtr->internalRep.twoPtrValue.ptr1;
-}
-\f
-/*
- * Local Variables:
- * mode: c
- * c-basic-offset: 4
- * fill-column: 78
- * End:
- */
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