/* * tkConfig.c -- * * This file contains functions that manage configuration options for * widgets and other things. * * Copyright (c) 1997-1998 Sun Microsystems, Inc. * * See the file "license.terms" for information on usage and redistribution of * this file, and for a DISCLAIMER OF ALL WARRANTIES. */ /* * Temporary flag for working on new config package. */ #if 0 /* * used only for removing the old config code */ #define __NO_OLD_CONFIG #endif #include "tkInt.h" #include "tkFont.h" /* * The following definition keeps track of all of * the option tables that have been created for a thread. */ typedef struct ThreadSpecificData { int initialized; /* 0 means table below needs initializing. */ Tcl_HashTable hashTable; } ThreadSpecificData; static Tcl_ThreadDataKey dataKey; /* * The following two structures are used along with Tk_OptionSpec structures * to manage configuration options. Tk_OptionSpec is static templates that are * compiled into the code of a widget or other object manager. However, to * look up options efficiently we need to supplement the static information * with additional dynamic information, and this dynamic information may be * different for each application. Thus we create structures of the following * two types to hold all of the dynamic information; this is done by * Tk_CreateOptionTable. * * One of the following structures corresponds to each Tk_OptionSpec. These * structures exist as arrays inside TkOptionTable structures. */ typedef struct TkOption { const Tk_OptionSpec *specPtr; /* The original spec from the template passed * to Tk_CreateOptionTable.*/ Tk_Uid dbNameUID; /* The Uid form of the option database * name. */ Tk_Uid dbClassUID; /* The Uid form of the option database class * name. */ Tcl_Obj *defaultPtr; /* Default value for this option. */ union { Tcl_Obj *monoColorPtr; /* For color and border options, this is an * alternate default value to use on * monochrome displays. */ struct TkOption *synonymPtr; /* For synonym options, this points to the * master entry. */ const struct Tk_ObjCustomOption *custom; /* For TK_OPTION_CUSTOM. */ } extra; int flags; /* Miscellaneous flag values; see below for * definitions. */ } Option; /* * Flag bits defined for Option structures: * * OPTION_NEEDS_FREEING - 1 means that FreeResources must be invoked to * free resources associated with the option when * it is no longer needed. */ #define OPTION_NEEDS_FREEING 1 /* * One of the following exists for each Tk_OptionSpec array that has been * passed to Tk_CreateOptionTable. */ typedef struct OptionTable { size_t refCount; /* Counts the number of uses of this table * (the number of times Tk_CreateOptionTable * has returned it). This can be greater than * 1 if it is shared along several option * table chains, or if the same table is used * for multiple purposes. */ Tcl_HashEntry *hashEntryPtr;/* Hash table entry that refers to this table; * used to delete the entry. */ struct OptionTable *nextPtr;/* If templatePtr was part of a chain of * templates, this points to the table * corresponding to the next template in the * chain. */ size_t numOptions; /* The number of items in the options array * below. */ Option options[1]; /* Information about the individual options in * the table. This must be the last field in * the structure: the actual size of the array * will be numOptions, not 1. */ } OptionTable; /* * Forward declarations for functions defined later in this file: */ static int DoObjConfig(Tcl_Interp *interp, char *recordPtr, Option *optionPtr, Tcl_Obj *valuePtr, Tk_Window tkwin, Tk_SavedOption *savePtr); static void FreeResources(Option *optionPtr, Tcl_Obj *objPtr, char *internalPtr, Tk_Window tkwin); static Tcl_Obj * GetConfigList(char *recordPtr, Option *optionPtr, Tk_Window tkwin); static Tcl_Obj * GetObjectForOption(char *recordPtr, Option *optionPtr, Tk_Window tkwin); static Option * GetOption(const char *name, OptionTable *tablePtr); static Option * GetOptionFromObj(Tcl_Interp *interp, Tcl_Obj *objPtr, OptionTable *tablePtr); static int ObjectIsEmpty(Tcl_Obj *objPtr); static void FreeOptionInternalRep(Tcl_Obj *objPtr); static void DupOptionInternalRep(Tcl_Obj *, Tcl_Obj *); /* * The structure below defines an object type that is used to cache the result * of looking up an option name. If an object has this type, then its * internalPtr1 field points to the OptionTable in which it was looked up, and * the internalPtr2 field points to the entry that matched. */ static const Tcl_ObjType optionObjType = { "option", /* name */ FreeOptionInternalRep, /* freeIntRepProc */ DupOptionInternalRep, /* dupIntRepProc */ NULL, /* updateStringProc */ NULL /* setFromAnyProc */ }; /* *-------------------------------------------------------------- * * Tk_CreateOptionTable -- * * Given a template for configuration options, this function creates a * table that may be used to look up options efficiently. * * Results: * Returns a token to a structure that can be passed to functions such as * Tk_InitOptions, Tk_SetOptions, and Tk_FreeConfigOptions. * * Side effects: * Storage is allocated. * *-------------------------------------------------------------- */ Tk_OptionTable Tk_CreateOptionTable( Tcl_Interp *interp, /* Interpreter associated with the application * in which this table will be used. */ const Tk_OptionSpec *templatePtr) /* Static information about the configuration * options. */ { Tcl_HashEntry *hashEntryPtr; int newEntry; OptionTable *tablePtr; const Tk_OptionSpec *specPtr, *specPtr2; Option *optionPtr; size_t numOptions, i; ThreadSpecificData *tsdPtr = Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData)); /* * We use an TSD in the thread to keep a hash table of * all the option tables we've created for this application. This is * used for allowing us to share the tables (e.g. in several chains). * The code below finds the hash table or creates a new one if it * doesn't already exist. */ if (!tsdPtr->initialized) { Tcl_InitHashTable(&tsdPtr->hashTable, TCL_ONE_WORD_KEYS); tsdPtr->initialized = 1; } /* * See if a table has already been created for this template. If so, just * reuse the existing table. */ hashEntryPtr = Tcl_CreateHashEntry(&tsdPtr->hashTable, (char *) templatePtr, &newEntry); if (!newEntry) { tablePtr = Tcl_GetHashValue(hashEntryPtr); tablePtr->refCount++; return (Tk_OptionTable) tablePtr; } /* * Count the number of options in the template, then create the table * structure. */ numOptions = 0; for (specPtr = templatePtr; specPtr->type != TK_OPTION_END; specPtr++) { numOptions++; } tablePtr = ckalloc(sizeof(OptionTable) + (numOptions * sizeof(Option))); tablePtr->refCount = 1; tablePtr->hashEntryPtr = hashEntryPtr; tablePtr->nextPtr = NULL; tablePtr->numOptions = numOptions; /* * Initialize all of the Option structures in the table. */ for (specPtr = templatePtr, optionPtr = tablePtr->options; specPtr->type != TK_OPTION_END; specPtr++, optionPtr++) { optionPtr->specPtr = specPtr; optionPtr->dbNameUID = NULL; optionPtr->dbClassUID = NULL; optionPtr->defaultPtr = NULL; optionPtr->extra.monoColorPtr = NULL; optionPtr->flags = 0; if (specPtr->type == TK_OPTION_SYNONYM) { /* * This is a synonym option; find the master option that it refers * to and create a pointer from the synonym to the master. */ for (specPtr2 = templatePtr, i = 0; ; specPtr2++, i++) { if (specPtr2->type == TK_OPTION_END) { Tcl_Panic("Tk_CreateOptionTable couldn't find synonym"); } if (strcmp(specPtr2->optionName, (char *) specPtr->clientData) == 0) { optionPtr->extra.synonymPtr = tablePtr->options + i; break; } } } else { if (specPtr->dbName != NULL) { optionPtr->dbNameUID = Tk_GetUid(specPtr->dbName); } if (specPtr->dbClass != NULL) { optionPtr->dbClassUID = Tk_GetUid(specPtr->dbClass); } if (specPtr->defValue != NULL) { optionPtr->defaultPtr = Tcl_NewStringObj(specPtr->defValue,-1); Tcl_IncrRefCount(optionPtr->defaultPtr); } if (((specPtr->type == TK_OPTION_COLOR) || (specPtr->type == TK_OPTION_BORDER)) && (specPtr->clientData != NULL)) { optionPtr->extra.monoColorPtr = Tcl_NewStringObj(specPtr->clientData, -1); Tcl_IncrRefCount(optionPtr->extra.monoColorPtr); } if (specPtr->type == TK_OPTION_CUSTOM) { /* * Get the custom parsing, etc., functions. */ optionPtr->extra.custom = specPtr->clientData; } } if (((specPtr->type == TK_OPTION_STRING) && (specPtr->internalOffset >= 0)) || (specPtr->type == TK_OPTION_COLOR) || (specPtr->type == TK_OPTION_FONT) || (specPtr->type == TK_OPTION_BITMAP) || (specPtr->type == TK_OPTION_BORDER) || (specPtr->type == TK_OPTION_CURSOR) || (specPtr->type == TK_OPTION_CUSTOM)) { optionPtr->flags |= OPTION_NEEDS_FREEING; } } tablePtr->hashEntryPtr = hashEntryPtr; Tcl_SetHashValue(hashEntryPtr, tablePtr); /* * Finally, check to see if this template chains to another template with * additional options. If so, call ourselves recursively to create the * next table(s). */ if (specPtr->clientData != NULL) { tablePtr->nextPtr = (OptionTable *) Tk_CreateOptionTable(interp, specPtr->clientData); } return (Tk_OptionTable) tablePtr; } /* *---------------------------------------------------------------------- * * Tk_DeleteOptionTable -- * * Called to release resources used by an option table when the table is * no longer needed. * * Results: * None. * * Side effects: * The option table and associated resources (such as additional option * tables chained off it) are destroyed. * *---------------------------------------------------------------------- */ void Tk_DeleteOptionTable( Tk_OptionTable optionTable) /* The option table to delete. */ { OptionTable *tablePtr = (OptionTable *) optionTable; Option *optionPtr; size_t count; if (tablePtr->refCount-- > 1) { return; } if (tablePtr->nextPtr != NULL) { Tk_DeleteOptionTable((Tk_OptionTable) tablePtr->nextPtr); } for (count = tablePtr->numOptions, optionPtr = tablePtr->options; count > 0; count--, optionPtr++) { if (optionPtr->defaultPtr != NULL) { Tcl_DecrRefCount(optionPtr->defaultPtr); } if (((optionPtr->specPtr->type == TK_OPTION_COLOR) || (optionPtr->specPtr->type == TK_OPTION_BORDER)) && (optionPtr->extra.monoColorPtr != NULL)) { Tcl_DecrRefCount(optionPtr->extra.monoColorPtr); } } Tcl_DeleteHashEntry(tablePtr->hashEntryPtr); ckfree(tablePtr); } /* *-------------------------------------------------------------- * * Tk_InitOptions -- * * This function is invoked when an object such as a widget is created. * It supplies an initial value for each configuration option (the value * may come from the option database, a system default, or the default in * the option table). * * Results: * The return value is TCL_OK if the function completed successfully, and * TCL_ERROR if one of the initial values was bogus. If an error occurs * and interp isn't NULL, then an error message will be left in its * result. * * Side effects: * Fields of recordPtr are filled in with initial values. * *-------------------------------------------------------------- */ int Tk_InitOptions( Tcl_Interp *interp, /* Interpreter for error reporting. NULL means * don't leave an error message. */ char *recordPtr, /* Pointer to the record to configure. Note: * the caller should have properly initialized * the record with NULL pointers for each * option value. */ Tk_OptionTable optionTable, /* The token which matches the config specs * for the widget in question. */ Tk_Window tkwin) /* Certain options types (such as * TK_OPTION_COLOR) need fields out of the * window they are used in to be able to * calculate their values. Not needed unless * one of these options is in the configSpecs * record. */ { OptionTable *tablePtr = (OptionTable *) optionTable; Option *optionPtr; int count; Tk_Uid value; Tcl_Obj *valuePtr; enum { OPTION_DATABASE, SYSTEM_DEFAULT, TABLE_DEFAULT } source; /* * If this table chains to other tables, handle their initialization * first. That way, if both tables refer to the same field of the record, * the value in the first table will win. */ if (tablePtr->nextPtr != NULL) { if (Tk_InitOptions(interp, recordPtr, (Tk_OptionTable) tablePtr->nextPtr, tkwin) != TCL_OK) { return TCL_ERROR; } } /* * Iterate over all of the options in the table, initializing each in * turn. */ for (optionPtr = tablePtr->options, count = tablePtr->numOptions; count > 0; optionPtr++, count--) { /* * If we specify TK_OPTION_DONT_SET_DEFAULT, then the user has * processed and set a default for this already. */ if ((optionPtr->specPtr->type == TK_OPTION_SYNONYM) || (optionPtr->specPtr->flags & TK_OPTION_DONT_SET_DEFAULT)) { continue; } source = TABLE_DEFAULT; /* * We look in three places for the initial value, using the first * non-NULL value that we find. First, check the option database. */ valuePtr = NULL; if (optionPtr->dbNameUID != NULL) { value = Tk_GetOption(tkwin, optionPtr->dbNameUID, optionPtr->dbClassUID); if (value != NULL) { valuePtr = Tcl_NewStringObj(value, -1); source = OPTION_DATABASE; } } /* * Second, check for a system-specific default value. */ if ((valuePtr == NULL) && (optionPtr->dbNameUID != NULL)) { valuePtr = TkpGetSystemDefault(tkwin, optionPtr->dbNameUID, optionPtr->dbClassUID); if (valuePtr != NULL) { source = SYSTEM_DEFAULT; } } /* * Third and last, use the default value supplied by the option table. * In the case of color objects, we pick one of two values depending * on whether the screen is mono or color. */ if (valuePtr == NULL) { if ((tkwin != NULL) && ((optionPtr->specPtr->type == TK_OPTION_COLOR) || (optionPtr->specPtr->type == TK_OPTION_BORDER)) && (Tk_Depth(tkwin) <= 1) && (optionPtr->extra.monoColorPtr != NULL)) { valuePtr = optionPtr->extra.monoColorPtr; } else { valuePtr = optionPtr->defaultPtr; } } if (valuePtr == NULL) { continue; } /* * Bump the reference count on valuePtr, so that it is strongly * referenced here, and will be properly free'd when finished, * regardless of what DoObjConfig does. */ Tcl_IncrRefCount(valuePtr); if (DoObjConfig(interp, recordPtr, optionPtr, valuePtr, tkwin, NULL) != TCL_OK) { if (interp != NULL) { char msg[200]; switch (source) { case OPTION_DATABASE: sprintf(msg, "\n (database entry for \"%.50s\")", optionPtr->specPtr->optionName); break; case SYSTEM_DEFAULT: sprintf(msg, "\n (system default for \"%.50s\")", optionPtr->specPtr->optionName); break; case TABLE_DEFAULT: sprintf(msg, "\n (default value for \"%.50s\")", optionPtr->specPtr->optionName); } if (tkwin != NULL) { sprintf(msg + strlen(msg) - 1, " in widget \"%.50s\")", Tk_PathName(tkwin)); } Tcl_AddErrorInfo(interp, msg); } Tcl_DecrRefCount(valuePtr); return TCL_ERROR; } Tcl_DecrRefCount(valuePtr); } return TCL_OK; } /* *-------------------------------------------------------------- * * DoObjConfig -- * * This function applies a new value for a configuration option to the * record being configured. * * Results: * The return value is TCL_OK if the function completed successfully. If * an error occurred then TCL_ERROR is returned and an error message is * left in interp's result, if interp isn't NULL. In addition, if * oldValuePtrPtr isn't NULL then it *oldValuePtrPtr is filled in with a * pointer to the option's old value. * * Side effects: * RecordPtr gets modified to hold the new value in the form of a * Tcl_Obj, an internal representation, or both. The old value is freed * if oldValuePtrPtr is NULL. * *-------------------------------------------------------------- */ static int DoObjConfig( Tcl_Interp *interp, /* Interpreter for error reporting. If NULL, * then no message is left if an error * occurs. */ char *recordPtr, /* The record to modify to hold the new option * value. */ Option *optionPtr, /* Pointer to information about the option. */ Tcl_Obj *valuePtr, /* New value for option. */ Tk_Window tkwin, /* Window in which option will be used (needed * to allocate resources for some options). * May be NULL if the option doesn't require * window-related resources. */ Tk_SavedOption *savedOptionPtr) /* If NULL, the old value for the option will * be freed. If non-NULL, the old value will * be stored here, and it becomes the property * of the caller (the caller must eventually * free the old value). */ { Tcl_Obj **slotPtrPtr, *oldPtr; char *internalPtr; /* Points to location in record where internal * representation of value should be stored, * or NULL. */ char *oldInternalPtr; /* Points to location in which to save old * internal representation of value. */ Tk_SavedOption internal; /* Used to save the old internal * representation of the value if * savedOptionPtr is NULL. */ const Tk_OptionSpec *specPtr; int nullOK; /* * Save the old object form for the value, if there is one. */ specPtr = optionPtr->specPtr; if (specPtr->objOffset >= 0) { slotPtrPtr = (Tcl_Obj **) (recordPtr + specPtr->objOffset); oldPtr = *slotPtrPtr; } else { slotPtrPtr = NULL; oldPtr = NULL; } /* * Apply the new value in a type-specific way. Also remember the old * object and internal forms, if they exist. */ if (specPtr->internalOffset >= 0) { internalPtr = recordPtr + specPtr->internalOffset; } else { internalPtr = NULL; } if (savedOptionPtr != NULL) { savedOptionPtr->optionPtr = optionPtr; savedOptionPtr->valuePtr = oldPtr; oldInternalPtr = (char *) &savedOptionPtr->internalForm; } else { oldInternalPtr = (char *) &internal.internalForm; } nullOK = (optionPtr->specPtr->flags & TK_OPTION_NULL_OK); switch (optionPtr->specPtr->type) { case TK_OPTION_BOOLEAN: { int newBool; if (Tcl_GetBooleanFromObj(interp, valuePtr, &newBool) != TCL_OK) { return TCL_ERROR; } if (internalPtr != NULL) { *((int *) oldInternalPtr) = *((int *) internalPtr); *((int *) internalPtr) = newBool; } break; } case TK_OPTION_INT: { int newInt; if (Tcl_GetIntFromObj(interp, valuePtr, &newInt) != TCL_OK) { return TCL_ERROR; } if (internalPtr != NULL) { *((int *) oldInternalPtr) = *((int *) internalPtr); *((int *) internalPtr) = newInt; } break; } case TK_OPTION_DOUBLE: { double newDbl; if (nullOK && ObjectIsEmpty(valuePtr)) { valuePtr = NULL; newDbl = 0; } else { if (Tcl_GetDoubleFromObj(interp, valuePtr, &newDbl) != TCL_OK) { return TCL_ERROR; } } if (internalPtr != NULL) { *((double *) oldInternalPtr) = *((double *) internalPtr); *((double *) internalPtr) = newDbl; } break; } case TK_OPTION_STRING: { char *newStr; const char *value; int length; if (nullOK && ObjectIsEmpty(valuePtr)) { valuePtr = NULL; } if (internalPtr != NULL) { if (valuePtr != NULL) { value = Tcl_GetStringFromObj(valuePtr, &length); newStr = ckalloc(length + 1); strcpy(newStr, value); } else { newStr = NULL; } *((char **) oldInternalPtr) = *((char **) internalPtr); *((char **) internalPtr) = newStr; } break; } case TK_OPTION_STRING_TABLE: { int newValue; if (Tcl_GetIndexFromObjStruct(interp, valuePtr, optionPtr->specPtr->clientData, sizeof(char *), optionPtr->specPtr->optionName+1, 0, &newValue) != TCL_OK) { return TCL_ERROR; } if (internalPtr != NULL) { *((int *) oldInternalPtr) = *((int *) internalPtr); *((int *) internalPtr) = newValue; } break; } case TK_OPTION_COLOR: { XColor *newPtr; if (nullOK && ObjectIsEmpty(valuePtr)) { valuePtr = NULL; newPtr = NULL; } else { newPtr = Tk_AllocColorFromObj(interp, tkwin, valuePtr); if (newPtr == NULL) { return TCL_ERROR; } } if (internalPtr != NULL) { *((XColor **) oldInternalPtr) = *((XColor **) internalPtr); *((XColor **) internalPtr) = newPtr; } break; } case TK_OPTION_FONT: { Tk_Font newFont; if (nullOK && ObjectIsEmpty(valuePtr)) { valuePtr = NULL; newFont = NULL; } else { newFont = Tk_AllocFontFromObj(interp, tkwin, valuePtr); if (newFont == NULL) { return TCL_ERROR; } } if (internalPtr != NULL) { *((Tk_Font *) oldInternalPtr) = *((Tk_Font *) internalPtr); *((Tk_Font *) internalPtr) = newFont; } break; } case TK_OPTION_STYLE: { Tk_Style newStyle; if (nullOK && ObjectIsEmpty(valuePtr)) { valuePtr = NULL; newStyle = NULL; } else { newStyle = Tk_AllocStyleFromObj(interp, valuePtr); if (newStyle == NULL) { return TCL_ERROR; } } if (internalPtr != NULL) { *((Tk_Style *) oldInternalPtr) = *((Tk_Style *) internalPtr); *((Tk_Style *) internalPtr) = newStyle; } break; } case TK_OPTION_BITMAP: { Pixmap newBitmap; if (nullOK && ObjectIsEmpty(valuePtr)) { valuePtr = NULL; newBitmap = None; } else { newBitmap = Tk_AllocBitmapFromObj(interp, tkwin, valuePtr); if (newBitmap == None) { return TCL_ERROR; } } if (internalPtr != NULL) { *((Pixmap *) oldInternalPtr) = *((Pixmap *) internalPtr); *((Pixmap *) internalPtr) = newBitmap; } break; } case TK_OPTION_BORDER: { Tk_3DBorder newBorder; if (nullOK && ObjectIsEmpty(valuePtr)) { valuePtr = NULL; newBorder = NULL; } else { newBorder = Tk_Alloc3DBorderFromObj(interp, tkwin, valuePtr); if (newBorder == NULL) { return TCL_ERROR; } } if (internalPtr != NULL) { *((Tk_3DBorder *) oldInternalPtr) = *((Tk_3DBorder *) internalPtr); *((Tk_3DBorder *) internalPtr) = newBorder; } break; } case TK_OPTION_RELIEF: { int newRelief; if (nullOK && ObjectIsEmpty(valuePtr)) { valuePtr = NULL; newRelief = TK_RELIEF_NULL; } else { if (Tk_GetReliefFromObj(interp, valuePtr, &newRelief) != TCL_OK) { return TCL_ERROR; } } if (internalPtr != NULL) { *((int *) oldInternalPtr) = *((int *) internalPtr); *((int *) internalPtr) = newRelief; } break; } case TK_OPTION_CURSOR: { Tk_Cursor newCursor; if (nullOK && ObjectIsEmpty(valuePtr)) { newCursor = None; valuePtr = NULL; } else { newCursor = Tk_AllocCursorFromObj(interp, tkwin, valuePtr); if (newCursor == None) { return TCL_ERROR; } } if (internalPtr != NULL) { *((Tk_Cursor *) oldInternalPtr) = *((Tk_Cursor *) internalPtr); *((Tk_Cursor *) internalPtr) = newCursor; } Tk_DefineCursor(tkwin, newCursor); break; } case TK_OPTION_JUSTIFY: { Tk_Justify newJustify; if (Tk_GetJustifyFromObj(interp, valuePtr, &newJustify) != TCL_OK) { return TCL_ERROR; } if (internalPtr != NULL) { *((Tk_Justify *) oldInternalPtr) = *((Tk_Justify *) internalPtr); *((Tk_Justify *) internalPtr) = newJustify; } break; } case TK_OPTION_ANCHOR: { Tk_Anchor newAnchor; if (Tk_GetAnchorFromObj(interp, valuePtr, &newAnchor) != TCL_OK) { return TCL_ERROR; } if (internalPtr != NULL) { *((Tk_Anchor *) oldInternalPtr) = *((Tk_Anchor *) internalPtr); *((Tk_Anchor *) internalPtr) = newAnchor; } break; } case TK_OPTION_PIXELS: { int newPixels; if (nullOK && ObjectIsEmpty(valuePtr)) { valuePtr = NULL; newPixels = 0; } else { if (Tk_GetPixelsFromObj(interp, tkwin, valuePtr, &newPixels) != TCL_OK) { return TCL_ERROR; } } if (internalPtr != NULL) { *((int *) oldInternalPtr) = *((int *) internalPtr); *((int *) internalPtr) = newPixels; } break; } case TK_OPTION_WINDOW: { Tk_Window newWin; if (nullOK && ObjectIsEmpty(valuePtr)) { valuePtr = NULL; newWin = None; } else { if (TkGetWindowFromObj(interp, tkwin, valuePtr, &newWin) != TCL_OK) { return TCL_ERROR; } } if (internalPtr != NULL) { *((Tk_Window *) oldInternalPtr) = *((Tk_Window *) internalPtr); *((Tk_Window *) internalPtr) = newWin; } break; } case TK_OPTION_CUSTOM: { const Tk_ObjCustomOption *custom = optionPtr->extra.custom; if (custom->setProc(custom->clientData, interp, tkwin, &valuePtr, recordPtr, optionPtr->specPtr->internalOffset, (char *)oldInternalPtr, optionPtr->specPtr->flags) != TCL_OK) { return TCL_ERROR; } break; } default: Tcl_SetObjResult(interp, Tcl_ObjPrintf( "bad config table: unknown type %d", optionPtr->specPtr->type)); Tcl_SetErrorCode(interp, "TK", "BAD_CONFIG", NULL); return TCL_ERROR; } /* * Release resources associated with the old value, if we're not returning * it to the caller, then install the new object value into the record. */ if (savedOptionPtr == NULL) { if (optionPtr->flags & OPTION_NEEDS_FREEING) { FreeResources(optionPtr, oldPtr, oldInternalPtr, tkwin); } if (oldPtr != NULL) { Tcl_DecrRefCount(oldPtr); } } if (slotPtrPtr != NULL) { *slotPtrPtr = valuePtr; if (valuePtr != NULL) { Tcl_IncrRefCount(valuePtr); } } return TCL_OK; } /* *---------------------------------------------------------------------- * * ObjectIsEmpty -- * * This function tests whether the string value of an object is empty. * * Results: * The return value is 1 if the string value of objPtr has length zero, * and 0 otherwise. * * Side effects: * None. * *---------------------------------------------------------------------- */ static int ObjectIsEmpty( Tcl_Obj *objPtr) /* Object to test. May be NULL. */ { int length; if (objPtr == NULL) { return 1; } if (objPtr->bytes != NULL) { return (objPtr->length == 0); } (void)Tcl_GetStringFromObj(objPtr, &length); return (length == 0); } /* *---------------------------------------------------------------------- * * GetOption -- * * This function searches through a chained option table to find the * entry for a particular option name. * * Results: * The return value is a pointer to the matching entry, or NULL if no * matching entry could be found. Note: if the matching entry is a * synonym then this function returns a pointer to the synonym entry, * *not* the "real" entry that the synonym refers to. * * Side effects: * None. * *---------------------------------------------------------------------- */ static Option * GetOption( const char *name, /* String balue to be looked up in the option * table. */ OptionTable *tablePtr) /* Table in which to look up name. */ { Option *bestPtr, *optionPtr; OptionTable *tablePtr2; const char *p1, *p2; size_t count; /* * Search through all of the option tables in the chain to find the best * match. Some tricky aspects: * * 1. We have to accept unique abbreviations. * 2. The same name could appear in different tables in the chain. If this * happens, we use the entry from the first table. We have to be * careful to distinguish this case from an ambiguous abbreviation. */ bestPtr = NULL; for (tablePtr2 = tablePtr; tablePtr2 != NULL; tablePtr2 = tablePtr2->nextPtr) { for (optionPtr = tablePtr2->options, count = tablePtr2->numOptions; count > 0; optionPtr++, count--) { for (p1 = name, p2 = optionPtr->specPtr->optionName; *p1 == *p2; p1++, p2++) { if (*p1 == 0) { /* * This is an exact match. We're done. */ return optionPtr; } } if (*p1 == 0) { /* * The name is an abbreviation for this option. Keep to make * sure that the abbreviation only matches one option name. * If we've already found a match in the past, then it is an * error unless the full names for the two options are * identical; in this case, the first option overrides the * second. */ if (bestPtr == NULL) { bestPtr = optionPtr; } else if (strcmp(bestPtr->specPtr->optionName, optionPtr->specPtr->optionName) != 0) { return NULL; } } } } /* * Return whatever we have found, which could be NULL if nothing * matched. The multiple-matching case is handled above. */ return bestPtr; } /* *---------------------------------------------------------------------- * * GetOptionFromObj -- * * This function searches through a chained option table to find the * entry for a particular option name. * * Results: * The return value is a pointer to the matching entry, or NULL if no * matching entry could be found. If NULL is returned and interp is not * NULL than an error message is left in its result. Note: if the * matching entry is a synonym then this function returns a pointer to * the synonym entry, *not* the "real" entry that the synonym refers to. * * Side effects: * Information about the matching entry is cached in the object * containing the name, so that future lookups can proceed more quickly. * *---------------------------------------------------------------------- */ static Option * GetOptionFromObj( Tcl_Interp *interp, /* Used only for error reporting; if NULL no * message is left after an error. */ Tcl_Obj *objPtr, /* Object whose string value is to be looked * up in the option table. */ OptionTable *tablePtr) /* Table in which to look up objPtr. */ { Option *bestPtr; const char *name; /* * First, check to see if the object already has the answer cached. */ if (objPtr->typePtr == &optionObjType) { if (objPtr->internalRep.twoPtrValue.ptr1 == (void *) tablePtr) { return (Option *) objPtr->internalRep.twoPtrValue.ptr2; } } /* * The answer isn't cached. */ name = Tcl_GetString(objPtr); bestPtr = GetOption(name, tablePtr); if (bestPtr == NULL) { goto error; } if ((objPtr->typePtr != NULL) && (objPtr->typePtr->freeIntRepProc != NULL)) { objPtr->typePtr->freeIntRepProc(objPtr); } objPtr->internalRep.twoPtrValue.ptr1 = (void *) tablePtr; objPtr->internalRep.twoPtrValue.ptr2 = (void *) bestPtr; objPtr->typePtr = &optionObjType; tablePtr->refCount++; return bestPtr; error: if (interp != NULL) { Tcl_SetObjResult(interp, Tcl_ObjPrintf( "unknown option \"%s\"", name)); Tcl_SetErrorCode(interp, "TK", "LOOKUP", "OPTION", name, NULL); } return NULL; } /* *---------------------------------------------------------------------- * * TkGetOptionSpec -- * * This function searches through a chained option table to find the * option spec for a particular option name. * * Results: * The return value is a pointer to the option spec of the matching * entry, or NULL if no matching entry could be found. Note: if the * matching entry is a synonym then this function returns a pointer to * the option spec of the synonym entry, *not* the "real" entry that the * synonym refers to. Note: this call is primarily used by the style * management code (tkStyle.c) to look up an element's option spec into a * widget's option table. * * Side effects: * None. * *---------------------------------------------------------------------- */ const Tk_OptionSpec * TkGetOptionSpec( const char *name, /* String value to be looked up. */ Tk_OptionTable optionTable) /* Table in which to look up name. */ { Option *optionPtr; optionPtr = GetOption(name, (OptionTable *) optionTable); if (optionPtr == NULL) { return NULL; } return optionPtr->specPtr; } /* *---------------------------------------------------------------------- * * FreeOptionInternalRep -- * * Part of the option Tcl object type implementation. Frees the storage * associated with a option object's internal representation unless it * is still in use. * * Results: * None. * * Side effects: * The option object's internal rep is marked invalid and its memory * gets freed unless it is still in use somewhere. In that case the * cleanup is delayed until the last reference goes away. * *---------------------------------------------------------------------- */ static void FreeOptionInternalRep( register Tcl_Obj *objPtr) /* Object whose internal rep to free. */ { register Tk_OptionTable tablePtr = (Tk_OptionTable) objPtr->internalRep.twoPtrValue.ptr1; Tk_DeleteOptionTable(tablePtr); objPtr->typePtr = NULL; objPtr->internalRep.twoPtrValue.ptr1 = NULL; objPtr->internalRep.twoPtrValue.ptr2 = NULL; } /* *--------------------------------------------------------------------------- * * DupOptionInternalRep -- * * When a cached option object is duplicated, this is called to update the * internal reps. * *--------------------------------------------------------------------------- */ static void DupOptionInternalRep( Tcl_Obj *srcObjPtr, /* The object we are copying from. */ Tcl_Obj *dupObjPtr) /* The object we are copying to. */ { register OptionTable *tablePtr = (OptionTable *) srcObjPtr->internalRep.twoPtrValue.ptr1; tablePtr->refCount++; dupObjPtr->typePtr = srcObjPtr->typePtr; dupObjPtr->internalRep = srcObjPtr->internalRep; } /* *-------------------------------------------------------------- * * Tk_SetOptions -- * * Process one or more name-value pairs for configuration options and * fill in fields of a record with new values. * * Results: * If all goes well then TCL_OK is returned and the old values of any * modified objects are saved in *savePtr, if it isn't NULL (the caller * must eventually call Tk_RestoreSavedOptions or Tk_FreeSavedOptions to * free the contents of *savePtr). In addition, if maskPtr isn't NULL * then *maskPtr is filled in with the OR of the typeMask bits from all * modified options. If an error occurs then TCL_ERROR is returned and a * message is left in interp's result unless interp is NULL; nothing is * saved in *savePtr or *maskPtr in this case. * * Side effects: * The fields of recordPtr get filled in with object pointers from * objc/objv. Old information in widgRec's fields gets recycled. * Information may be left at *savePtr. * *-------------------------------------------------------------- */ int Tk_SetOptions( Tcl_Interp *interp, /* Interpreter for error reporting. If NULL, * then no error message is returned.*/ char *recordPtr, /* The record to configure. */ Tk_OptionTable optionTable, /* Describes valid options. */ int objc, /* The number of elements in objv. */ Tcl_Obj *const objv[], /* Contains one or more name-value pairs. */ Tk_Window tkwin, /* Window associated with the thing being * configured; needed for some options (such * as colors). */ Tk_SavedOptions *savePtr, /* If non-NULL, the old values of modified * options are saved here so that they can be * restored after an error. */ int *maskPtr) /* It non-NULL, this word is modified on a * successful return to hold the bit-wise OR * of the typeMask fields of all options that * were modified by this call. Used by the * caller to figure out which options actually * changed. */ { OptionTable *tablePtr = (OptionTable *) optionTable; Option *optionPtr; Tk_SavedOptions *lastSavePtr, *newSavePtr; int mask; if (savePtr != NULL) { savePtr->recordPtr = recordPtr; savePtr->tkwin = tkwin; savePtr->numItems = 0; savePtr->nextPtr = NULL; } lastSavePtr = savePtr; /* * Scan through all of the arguments, processing those that match entries * in the option table. */ mask = 0; for ( ; objc > 0; objc -= 2, objv += 2) { optionPtr = GetOptionFromObj(interp, objv[0], tablePtr); if (optionPtr == NULL) { goto error; } if (optionPtr->specPtr->type == TK_OPTION_SYNONYM) { optionPtr = optionPtr->extra.synonymPtr; } if (objc < 2) { if (interp != NULL) { Tcl_SetObjResult(interp, Tcl_ObjPrintf( "value for \"%s\" missing", Tcl_GetString(*objv))); Tcl_SetErrorCode(interp, "TK", "VALUE_MISSING", NULL); goto error; } } if ((savePtr != NULL) && (lastSavePtr->numItems >= TK_NUM_SAVED_OPTIONS)) { /* * We've run out of space for saving old option values. Allocate * more space. */ newSavePtr = ckalloc(sizeof(Tk_SavedOptions)); newSavePtr->recordPtr = recordPtr; newSavePtr->tkwin = tkwin; newSavePtr->numItems = 0; newSavePtr->nextPtr = NULL; lastSavePtr->nextPtr = newSavePtr; lastSavePtr = newSavePtr; } if (DoObjConfig(interp, recordPtr, optionPtr, objv[1], tkwin, (savePtr != NULL) ? &lastSavePtr->items[lastSavePtr->numItems] : NULL) != TCL_OK) { Tcl_AppendObjToErrorInfo(interp, Tcl_ObjPrintf( "\n (processing \"%.40s\" option)", Tcl_GetString(*objv))); goto error; } if (savePtr != NULL) { lastSavePtr->numItems++; } mask |= optionPtr->specPtr->typeMask; } if (maskPtr != NULL) { *maskPtr = mask; } return TCL_OK; error: if (savePtr != NULL) { Tk_RestoreSavedOptions(savePtr); } return TCL_ERROR; } /* *---------------------------------------------------------------------- * * Tk_RestoreSavedOptions -- * * This function undoes the effect of a previous call to Tk_SetOptions by * restoring all of the options to their value before the call to * Tk_SetOptions. * * Results: * None. * * Side effects: * The configutation record is restored and all the information stored in * savePtr is freed. * *---------------------------------------------------------------------- */ void Tk_RestoreSavedOptions( Tk_SavedOptions *savePtr) /* Holds saved option information; must have * been passed to Tk_SetOptions. */ { int i; Option *optionPtr; Tcl_Obj *newPtr; /* New object value of option, which we * replace with old value and free. Taken from * record. */ char *internalPtr; /* Points to internal value of option in * record. */ const Tk_OptionSpec *specPtr; /* * Be sure to restore the options in the opposite order they were set. * This is important because it's possible that the same option name was * used twice in a single call to Tk_SetOptions. */ if (savePtr->nextPtr != NULL) { Tk_RestoreSavedOptions(savePtr->nextPtr); ckfree(savePtr->nextPtr); savePtr->nextPtr = NULL; } for (i = savePtr->numItems - 1; i >= 0; i--) { optionPtr = savePtr->items[i].optionPtr; specPtr = optionPtr->specPtr; /* * First free the new value of the option, which is currently in the * record. */ if (specPtr->objOffset >= 0) { newPtr = *((Tcl_Obj **) (savePtr->recordPtr + specPtr->objOffset)); } else { newPtr = NULL; } if (specPtr->internalOffset >= 0) { internalPtr = savePtr->recordPtr + specPtr->internalOffset; } else { internalPtr = NULL; } if (optionPtr->flags & OPTION_NEEDS_FREEING) { FreeResources(optionPtr, newPtr, internalPtr, savePtr->tkwin); } if (newPtr != NULL) { Tcl_DecrRefCount(newPtr); } /* * Now restore the old value of the option. */ if (specPtr->objOffset >= 0) { *((Tcl_Obj **) (savePtr->recordPtr + specPtr->objOffset)) = savePtr->items[i].valuePtr; } if (specPtr->internalOffset >= 0) { register char *ptr = (char *) &savePtr->items[i].internalForm; CLANG_ASSERT(internalPtr); switch (specPtr->type) { case TK_OPTION_BOOLEAN: *((int *) internalPtr) = *((int *) ptr); break; case TK_OPTION_INT: *((int *) internalPtr) = *((int *) ptr); break; case TK_OPTION_DOUBLE: *((double *) internalPtr) = *((double *) ptr); break; case TK_OPTION_STRING: *((char **) internalPtr) = *((char **) ptr); break; case TK_OPTION_STRING_TABLE: *((int *) internalPtr) = *((int *) ptr); break; case TK_OPTION_COLOR: *((XColor **) internalPtr) = *((XColor **) ptr); break; case TK_OPTION_FONT: *((Tk_Font *) internalPtr) = *((Tk_Font *) ptr); break; case TK_OPTION_STYLE: *((Tk_Style *) internalPtr) = *((Tk_Style *) ptr); break; case TK_OPTION_BITMAP: *((Pixmap *) internalPtr) = *((Pixmap *) ptr); break; case TK_OPTION_BORDER: *((Tk_3DBorder *) internalPtr) = *((Tk_3DBorder *) ptr); break; case TK_OPTION_RELIEF: *((int *) internalPtr) = *((int *) ptr); break; case TK_OPTION_CURSOR: *((Tk_Cursor *) internalPtr) = *((Tk_Cursor *) ptr); Tk_DefineCursor(savePtr->tkwin, *((Tk_Cursor *) internalPtr)); break; case TK_OPTION_JUSTIFY: *((Tk_Justify *) internalPtr) = *((Tk_Justify *) ptr); break; case TK_OPTION_ANCHOR: *((Tk_Anchor *) internalPtr) = *((Tk_Anchor *) ptr); break; case TK_OPTION_PIXELS: *((int *) internalPtr) = *((int *) ptr); break; case TK_OPTION_WINDOW: *((Tk_Window *) internalPtr) = *((Tk_Window *) ptr); break; case TK_OPTION_CUSTOM: { const Tk_ObjCustomOption *custom = optionPtr->extra.custom; if (custom->restoreProc != NULL) { custom->restoreProc(custom->clientData, savePtr->tkwin, internalPtr, ptr); } break; } default: Tcl_Panic("bad option type in Tk_RestoreSavedOptions"); } } } savePtr->numItems = 0; } /* *-------------------------------------------------------------- * * Tk_FreeSavedOptions -- * * Free all of the saved configuration option values from a previous call * to Tk_SetOptions. * * Results: * None. * * Side effects: * Storage and system resources are freed. * *-------------------------------------------------------------- */ void Tk_FreeSavedOptions( Tk_SavedOptions *savePtr) /* Contains options saved in a previous call * to Tk_SetOptions. */ { int count; Tk_SavedOption *savedOptionPtr; if (savePtr->nextPtr != NULL) { Tk_FreeSavedOptions(savePtr->nextPtr); ckfree(savePtr->nextPtr); } for (count = savePtr->numItems, savedOptionPtr = &savePtr->items[savePtr->numItems-1]; count > 0; count--, savedOptionPtr--) { if (savedOptionPtr->optionPtr->flags & OPTION_NEEDS_FREEING) { FreeResources(savedOptionPtr->optionPtr, savedOptionPtr->valuePtr, (char *) &savedOptionPtr->internalForm, savePtr->tkwin); } if (savedOptionPtr->valuePtr != NULL) { Tcl_DecrRefCount(savedOptionPtr->valuePtr); } } } /* *---------------------------------------------------------------------- * * Tk_FreeConfigOptions -- * * Free all resources associated with configuration options. * * Results: * None. * * Side effects: * All of the Tcl_Obj's in recordPtr that are controlled by configuration * options in optionTable are freed. * *---------------------------------------------------------------------- */ /* ARGSUSED */ void Tk_FreeConfigOptions( char *recordPtr, /* Record whose fields contain current values * for options. */ Tk_OptionTable optionTable, /* Describes legal options. */ Tk_Window tkwin) /* Window associated with recordPtr; needed * for freeing some options. */ { OptionTable *tablePtr; Option *optionPtr; size_t count; Tcl_Obj **oldPtrPtr, *oldPtr; char *oldInternalPtr; const Tk_OptionSpec *specPtr; for (tablePtr = (OptionTable *) optionTable; tablePtr != NULL; tablePtr = tablePtr->nextPtr) { for (optionPtr = tablePtr->options, count = tablePtr->numOptions; count > 0; optionPtr++, count--) { specPtr = optionPtr->specPtr; if (specPtr->type == TK_OPTION_SYNONYM) { continue; } if (specPtr->objOffset >= 0) { oldPtrPtr = (Tcl_Obj **) (recordPtr + specPtr->objOffset); oldPtr = *oldPtrPtr; *oldPtrPtr = NULL; } else { oldPtr = NULL; } if (specPtr->internalOffset >= 0) { oldInternalPtr = recordPtr + specPtr->internalOffset; } else { oldInternalPtr = NULL; } if (optionPtr->flags & OPTION_NEEDS_FREEING) { FreeResources(optionPtr, oldPtr, oldInternalPtr, tkwin); } if (oldPtr != NULL) { Tcl_DecrRefCount(oldPtr); } } } } /* *---------------------------------------------------------------------- * * FreeResources -- * * Free system resources associated with a configuration option, such as * colors or fonts. * * Results: * None. * * Side effects: * Any system resources associated with objPtr are released. However, * objPtr itself is not freed. * *---------------------------------------------------------------------- */ static void FreeResources( Option *optionPtr, /* Description of the configuration option. */ Tcl_Obj *objPtr, /* The current value of the option, specified * as an object. */ char *internalPtr, /* A pointer to an internal representation for * the option's value, such as an int or * (XColor *). Only valid if * optionPtr->specPtr->internalOffset >= 0. */ Tk_Window tkwin) /* The window in which this option is used. */ { int internalFormExists; /* * If there exists an internal form for the value, use it to free * resources (also zero out the internal form). If there is no internal * form, then use the object form. */ internalFormExists = optionPtr->specPtr->internalOffset >= 0; switch (optionPtr->specPtr->type) { case TK_OPTION_STRING: if (internalFormExists) { if (*((char **) internalPtr) != NULL) { ckfree(*((char **) internalPtr)); *((char **) internalPtr) = NULL; } } break; case TK_OPTION_COLOR: if (internalFormExists) { if (*((XColor **) internalPtr) != NULL) { Tk_FreeColor(*((XColor **) internalPtr)); *((XColor **) internalPtr) = NULL; } } else if (objPtr != NULL) { Tk_FreeColorFromObj(tkwin, objPtr); } break; case TK_OPTION_FONT: if (internalFormExists) { Tk_FreeFont(*((Tk_Font *) internalPtr)); *((Tk_Font *) internalPtr) = NULL; } else if (objPtr != NULL) { Tk_FreeFontFromObj(tkwin, objPtr); } break; case TK_OPTION_STYLE: if (internalFormExists) { Tk_FreeStyle(*((Tk_Style *) internalPtr)); *((Tk_Style *) internalPtr) = NULL; } else if (objPtr != NULL) { Tk_FreeStyleFromObj(objPtr); } break; case TK_OPTION_BITMAP: if (internalFormExists) { if (*((Pixmap *) internalPtr) != None) { Tk_FreeBitmap(Tk_Display(tkwin), *((Pixmap *) internalPtr)); *((Pixmap *) internalPtr) = None; } } else if (objPtr != NULL) { Tk_FreeBitmapFromObj(tkwin, objPtr); } break; case TK_OPTION_BORDER: if (internalFormExists) { if (*((Tk_3DBorder *) internalPtr) != NULL) { Tk_Free3DBorder(*((Tk_3DBorder *) internalPtr)); *((Tk_3DBorder *) internalPtr) = NULL; } } else if (objPtr != NULL) { Tk_Free3DBorderFromObj(tkwin, objPtr); } break; case TK_OPTION_CURSOR: if (internalFormExists) { if (*((Tk_Cursor *) internalPtr) != None) { Tk_FreeCursor(Tk_Display(tkwin), *((Tk_Cursor *) internalPtr)); *((Tk_Cursor *) internalPtr) = None; } } else if (objPtr != NULL) { Tk_FreeCursorFromObj(tkwin, objPtr); } break; case TK_OPTION_CUSTOM: { const Tk_ObjCustomOption *custom = optionPtr->extra.custom; if (internalFormExists && custom->freeProc != NULL) { custom->freeProc(custom->clientData, tkwin, internalPtr); } break; } default: break; } } /* *-------------------------------------------------------------- * * Tk_GetOptionInfo -- * * Returns a list object containing complete information about either a * single option or all the configuration options in a table. * * Results: * This function normally returns a pointer to an object. If namePtr * isn't NULL, then the result object is a list with five elements: the * option's name, its database name, database class, default value, and * current value. If the option is a synonym then the list will contain * only two values: the option name and the name of the option it refers * to. If namePtr is NULL, then information is returned for every option * in the option table: the result will have one sub-list (in the form * described above) for each option in the table. If an error occurs * (e.g. because namePtr isn't valid) then NULL is returned and an error * message will be left in interp's result unless interp is NULL. * * Side effects: * None. * *-------------------------------------------------------------- */ Tcl_Obj * Tk_GetOptionInfo( Tcl_Interp *interp, /* Interpreter for error reporting. If NULL, * then no error message is created. */ char *recordPtr, /* Record whose fields contain current values * for options. */ Tk_OptionTable optionTable, /* Describes all the legal options. */ Tcl_Obj *namePtr, /* If non-NULL, the string value selects a * single option whose info is to be returned. * Otherwise info is returned for all options * in optionTable. */ Tk_Window tkwin) /* Window associated with recordPtr; needed to * compute correct default value for some * options. */ { Tcl_Obj *resultPtr; OptionTable *tablePtr = (OptionTable *) optionTable; Option *optionPtr; size_t count; /* * If information is only wanted for a single configuration spec, then * handle that one spec specially. */ if (namePtr != NULL) { optionPtr = GetOptionFromObj(interp, namePtr, tablePtr); if (optionPtr == NULL) { return NULL; } if (optionPtr->specPtr->type == TK_OPTION_SYNONYM) { optionPtr = optionPtr->extra.synonymPtr; } return GetConfigList(recordPtr, optionPtr, tkwin); } /* * Loop through all the specs, creating a big list with all their * information. */ resultPtr = Tcl_NewListObj(0, NULL); for (; tablePtr != NULL; tablePtr = tablePtr->nextPtr) { for (optionPtr = tablePtr->options, count = tablePtr->numOptions; count > 0; optionPtr++, count--) { Tcl_ListObjAppendElement(interp, resultPtr, GetConfigList(recordPtr, optionPtr, tkwin)); } } return resultPtr; } /* *-------------------------------------------------------------- * * GetConfigList -- * * Create a valid Tcl list holding the configuration information for a * single configuration option. * * Results: * A Tcl list, dynamically allocated. The caller is expected to arrange * for this list to be freed eventually. * * Side effects: * Memory is allocated. * *-------------------------------------------------------------- */ static Tcl_Obj * GetConfigList( char *recordPtr, /* Pointer to record holding current values of * configuration options. */ Option *optionPtr, /* Pointer to information describing a * particular option. */ Tk_Window tkwin) /* Window corresponding to recordPtr. */ { Tcl_Obj *listPtr, *elementPtr; listPtr = Tcl_NewListObj(0, NULL); Tcl_ListObjAppendElement(NULL, listPtr, Tcl_NewStringObj(optionPtr->specPtr->optionName, -1)); if (optionPtr->specPtr->type == TK_OPTION_SYNONYM) { elementPtr = Tcl_NewStringObj( optionPtr->extra.synonymPtr->specPtr->optionName, -1); Tcl_ListObjAppendElement(NULL, listPtr, elementPtr); } else { if (optionPtr->dbNameUID == NULL) { elementPtr = Tcl_NewObj(); } else { elementPtr = Tcl_NewStringObj(optionPtr->dbNameUID, -1); } Tcl_ListObjAppendElement(NULL, listPtr, elementPtr); if (optionPtr->dbClassUID == NULL) { elementPtr = Tcl_NewObj(); } else { elementPtr = Tcl_NewStringObj(optionPtr->dbClassUID, -1); } Tcl_ListObjAppendElement(NULL, listPtr, elementPtr); if ((tkwin != NULL) && ((optionPtr->specPtr->type == TK_OPTION_COLOR) || (optionPtr->specPtr->type == TK_OPTION_BORDER)) && (Tk_Depth(tkwin) <= 1) && (optionPtr->extra.monoColorPtr != NULL)) { elementPtr = optionPtr->extra.monoColorPtr; } else if (optionPtr->defaultPtr != NULL) { elementPtr = optionPtr->defaultPtr; } else { elementPtr = Tcl_NewObj(); } Tcl_ListObjAppendElement(NULL, listPtr, elementPtr); if (optionPtr->specPtr->objOffset >= 0) { elementPtr = *((Tcl_Obj **) (recordPtr + optionPtr->specPtr->objOffset)); if (elementPtr == NULL) { elementPtr = Tcl_NewObj(); } } else { elementPtr = GetObjectForOption(recordPtr, optionPtr, tkwin); } Tcl_ListObjAppendElement(NULL, listPtr, elementPtr); } return listPtr; } /* *---------------------------------------------------------------------- * * GetObjectForOption -- * * This function is called to create an object that contains the value * for an option. It is invoked by GetConfigList and Tk_GetOptionValue * when only the internal form of an option is stored in the record. * * Results: * The return value is a pointer to a Tcl object. The caller must call * Tcl_IncrRefCount on this object to preserve it. * * Side effects: * None. * *---------------------------------------------------------------------- */ static Tcl_Obj * GetObjectForOption( char *recordPtr, /* Pointer to record holding current values of * configuration options. */ Option *optionPtr, /* Pointer to information describing an option * whose internal value is stored in * *recordPtr. */ Tk_Window tkwin) /* Window corresponding to recordPtr. */ { Tcl_Obj *objPtr; char *internalPtr; /* Points to internal value of option in * record. */ internalPtr = recordPtr + optionPtr->specPtr->internalOffset; objPtr = NULL; switch (optionPtr->specPtr->type) { case TK_OPTION_BOOLEAN: objPtr = Tcl_NewIntObj(*((int *) internalPtr)); break; case TK_OPTION_INT: objPtr = Tcl_NewIntObj(*((int *) internalPtr)); break; case TK_OPTION_DOUBLE: objPtr = Tcl_NewDoubleObj(*((double *) internalPtr)); break; case TK_OPTION_STRING: objPtr = Tcl_NewStringObj(*((char **) internalPtr), -1); break; case TK_OPTION_STRING_TABLE: objPtr = Tcl_NewStringObj(((char **) optionPtr->specPtr->clientData)[ *((int *) internalPtr)], -1); break; case TK_OPTION_COLOR: { XColor *colorPtr = *((XColor **) internalPtr); if (colorPtr != NULL) { objPtr = Tcl_NewStringObj(Tk_NameOfColor(colorPtr), -1); } break; } case TK_OPTION_FONT: { Tk_Font tkfont = *((Tk_Font *) internalPtr); if (tkfont != NULL) { objPtr = Tcl_NewStringObj(Tk_NameOfFont(tkfont), -1); } break; } case TK_OPTION_STYLE: { Tk_Style style = *((Tk_Style *) internalPtr); if (style != NULL) { objPtr = Tcl_NewStringObj(Tk_NameOfStyle(style), -1); } break; } case TK_OPTION_BITMAP: { Pixmap pixmap = *((Pixmap *) internalPtr); if (pixmap != None) { objPtr = Tcl_NewStringObj( Tk_NameOfBitmap(Tk_Display(tkwin), pixmap), -1); } break; } case TK_OPTION_BORDER: { Tk_3DBorder border = *((Tk_3DBorder *) internalPtr); if (border != NULL) { objPtr = Tcl_NewStringObj(Tk_NameOf3DBorder(border), -1); } break; } case TK_OPTION_RELIEF: objPtr = Tcl_NewStringObj(Tk_NameOfRelief(*((int *) internalPtr)), -1); break; case TK_OPTION_CURSOR: { Tk_Cursor cursor = *((Tk_Cursor *) internalPtr); if (cursor != None) { objPtr = Tcl_NewStringObj( Tk_NameOfCursor(Tk_Display(tkwin), cursor), -1); } break; } case TK_OPTION_JUSTIFY: objPtr = Tcl_NewStringObj(Tk_NameOfJustify( *((Tk_Justify *) internalPtr)), -1); break; case TK_OPTION_ANCHOR: objPtr = Tcl_NewStringObj(Tk_NameOfAnchor( *((Tk_Anchor *) internalPtr)), -1); break; case TK_OPTION_PIXELS: objPtr = Tcl_NewIntObj(*((int *) internalPtr)); break; case TK_OPTION_WINDOW: { Tk_Window tkwin = *((Tk_Window *) internalPtr); if (tkwin != NULL) { objPtr = Tcl_NewStringObj(Tk_PathName(tkwin), -1); } break; } case TK_OPTION_CUSTOM: { const Tk_ObjCustomOption *custom = optionPtr->extra.custom; objPtr = custom->getProc(custom->clientData, tkwin, recordPtr, optionPtr->specPtr->internalOffset); break; } default: Tcl_Panic("bad option type in GetObjectForOption"); } if (objPtr == NULL) { objPtr = Tcl_NewObj(); } return objPtr; } /* *---------------------------------------------------------------------- * * Tk_GetOptionValue -- * * This function returns the current value of a configuration option. * * Results: * The return value is the object holding the current value of the option * given by namePtr. If no such option exists, then the return value is * NULL and an error message is left in interp's result (if interp isn't * NULL). * * Side effects: * None. * *---------------------------------------------------------------------- */ Tcl_Obj * Tk_GetOptionValue( Tcl_Interp *interp, /* Interpreter for error reporting. If NULL * then no messages are provided for * errors. */ char *recordPtr, /* Record whose fields contain current values * for options. */ Tk_OptionTable optionTable, /* Describes legal options. */ Tcl_Obj *namePtr, /* Gives the command-line name for the option * whose value is to be returned. */ Tk_Window tkwin) /* Window corresponding to recordPtr. */ { OptionTable *tablePtr = (OptionTable *) optionTable; Option *optionPtr; Tcl_Obj *resultPtr; optionPtr = GetOptionFromObj(interp, namePtr, tablePtr); if (optionPtr == NULL) { return NULL; } if (optionPtr->specPtr->type == TK_OPTION_SYNONYM) { optionPtr = optionPtr->extra.synonymPtr; } if (optionPtr->specPtr->objOffset >= 0) { resultPtr = *((Tcl_Obj **) (recordPtr+optionPtr->specPtr->objOffset)); if (resultPtr == NULL) { /* * This option has a null value and is represented by a null * object pointer. We can't return the null pointer, since that * would indicate an error. Instead, return a new empty object. */ resultPtr = Tcl_NewObj(); } } else { resultPtr = GetObjectForOption(recordPtr, optionPtr, tkwin); } return resultPtr; } /* *---------------------------------------------------------------------- * * TkDebugConfig -- * * This is a debugging function that returns information about one of the * configuration tables that currently exists for an interpreter. * * Results: * If the specified table exists in the given interpreter, then a list is * returned describing the table and any other tables that it chains to: * for each table there will be three list elements giving the reference * count for the table, the number of elements in the table, and the * command-line name for the first option in the table. If the table * doesn't exist in the interpreter then an empty object is returned. * The reference count for the returned object is 0. * * Side effects: * None. * *---------------------------------------------------------------------- */ Tcl_Obj * TkDebugConfig( Tcl_Interp *interp, /* Interpreter in which the table is * defined. */ Tk_OptionTable table) /* Table about which information is to be * returned. May not necessarily exist in the * interpreter anymore. */ { OptionTable *tablePtr = (OptionTable *) table; Tcl_HashEntry *hashEntryPtr; Tcl_HashSearch search; Tcl_Obj *objPtr; ThreadSpecificData *tsdPtr = Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData)); objPtr = Tcl_NewObj(); if (!tablePtr || !tsdPtr->initialized) { return objPtr; } /* * Scan all the tables for this interpreter to make sure that the one we * want still is valid. */ for (hashEntryPtr = Tcl_FirstHashEntry(&tsdPtr->hashTable, &search); hashEntryPtr != NULL; hashEntryPtr = Tcl_NextHashEntry(&search)) { if (tablePtr == (OptionTable *) Tcl_GetHashValue(hashEntryPtr)) { for ( ; tablePtr != NULL; tablePtr = tablePtr->nextPtr) { Tcl_ListObjAppendElement(NULL, objPtr, Tcl_NewWideIntObj(tablePtr->refCount)); Tcl_ListObjAppendElement(NULL, objPtr, Tcl_NewWideIntObj(tablePtr->numOptions)); Tcl_ListObjAppendElement(NULL, objPtr, Tcl_NewStringObj( tablePtr->options[0].specPtr->optionName, -1)); } break; } } return objPtr; } /* * Local Variables: * mode: c * c-basic-offset: 4 * fill-column: 78 * End: */