diff options
Diffstat (limited to 'mac/tkMacFont.c')
| -rw-r--r-- | mac/tkMacFont.c | 2150 |
1 files changed, 0 insertions, 2150 deletions
diff --git a/mac/tkMacFont.c b/mac/tkMacFont.c deleted file mode 100644 index 2cf270b..0000000 --- a/mac/tkMacFont.c +++ /dev/null @@ -1,2150 +0,0 @@ -/* - * tkMacFont.c -- - * - * Contains the Macintosh implementation of the platform-independant - * font package interface. - * - * Copyright (c) 1990-1994 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 <Windows.h> -#include <Strings.h> -#include <Fonts.h> -#include <Script.h> -#include <Resources.h> -#include <TextUtils.h> - -#include "tkMacInt.h" -#include "tkFont.h" - -/* - * For doing things with Mac strings and Fixed numbers. This probably should move - * the mac header file. - */ - -#ifndef StrLength -#define StrLength(s) (*((unsigned char *) (s))) -#endif -#ifndef StrBody -#define StrBody(s) ((char *) (s) + 1) -#endif -#define pstrcmp(s1, s2) RelString((s1), (s2), 1, 1) -#define pstrcasecmp(s1, s2) RelString((s1), (s2), 0, 1) - -#ifndef Fixed2Int -#define Fixed2Int(f) ((f) >> 16) -#define Int2Fixed(i) ((i) << 16) -#endif - -/* - * The preferred font encodings. - */ - -static CONST char *encodingList[] = { - "macRoman", "macJapan", NULL -}; - -/* - * The following structures are used to map the script/language codes of a - * font to the name that should be passed to Tcl_GetTextEncoding() to obtain - * the encoding for that font. The set of numeric constants is fixed and - * defined by Apple. - */ - -static TkStateMap scriptMap[] = { - {smRoman, "macRoman"}, - {smJapanese, "macJapan"}, - {smTradChinese, "macChinese"}, - {smKorean, "macKorean"}, - {smArabic, "macArabic"}, - {smHebrew, "macHebrew"}, - {smGreek, "macGreek"}, - {smCyrillic, "macCyrillic"}, - {smRSymbol, "macRSymbol"}, - {smDevanagari, "macDevanagari"}, - {smGurmukhi, "macGurmukhi"}, - {smGujarati, "macGujarati"}, - {smOriya, "macOriya"}, - {smBengali, "macBengali"}, - {smTamil, "macTamil"}, - {smTelugu, "macTelugu"}, - {smKannada, "macKannada"}, - {smMalayalam, "macMalayalam"}, - {smSinhalese, "macSinhalese"}, - {smBurmese, "macBurmese"}, - {smKhmer, "macKhmer"}, - {smThai, "macThailand"}, - {smLaotian, "macLaos"}, - {smGeorgian, "macGeorgia"}, - {smArmenian, "macArmenia"}, - {smSimpChinese, "macSimpChinese"}, - {smTibetan, "macTIbet"}, - {smMongolian, "macMongolia"}, - {smGeez, "macEthiopia"}, - {smEastEurRoman, "macCentEuro"}, - {smVietnamese, "macVietnam"}, - {smExtArabic, "macSindhi"}, - {NULL, NULL} -}; - -static TkStateMap romanMap[] = { - {langCroatian, "macCroatian"}, - {langSlovenian, "macCroatian"}, - {langIcelandic, "macIceland"}, - {langRomanian, "macRomania"}, - {langTurkish, "macTurkish"}, - {langGreek, "macGreek"}, - {NULL, NULL} -}; - -static TkStateMap cyrillicMap[] = { - {langUkrainian, "macUkraine"}, - {langBulgarian, "macBulgaria"}, - {NULL, NULL} -}; - -/* - * The following structure represents a font family. It is assumed that - * all screen fonts constructed from the same "font family" share certain - * properties; all screen fonts with the same "font family" point to a - * shared instance of this structure. The most important shared property - * is the character existence metrics, used to determine if a screen font - * can display a given Unicode character. - * - * Under Macintosh, a "font family" is uniquely identified by its face number. - */ - - -#define FONTMAP_SHIFT 10 - -#define FONTMAP_PAGES (1 << (sizeof(Tcl_UniChar) * 8 - FONTMAP_SHIFT)) -#define FONTMAP_BITSPERPAGE (1 << FONTMAP_SHIFT) - -typedef struct FontFamily { - struct FontFamily *nextPtr; /* Next in list of all known font families. */ - int refCount; /* How many SubFonts are referring to this - * FontFamily. When the refCount drops to - * zero, this FontFamily may be freed. */ - /* - * Key. - */ - - short faceNum; /* Unique face number key for this FontFamily. */ - - /* - * Derived properties. - */ - - Tcl_Encoding encoding; /* Encoding for this font family. */ - int isSymbolFont; /* Non-zero if this is a symbol family. */ - int isMultiByteFont; /* Non-zero if this is a multi-byte family. */ - char typeTable[256]; /* Table that identfies all lead bytes for a - * multi-byte family, used when measuring chars. - * If a byte is a lead byte, the value at the - * corresponding position in the typeTable is 1, - * otherwise 0. If this is a single-byte font, - * all entries are 0. */ - char *fontMap[FONTMAP_PAGES]; - /* Two-level sparse table used to determine - * quickly if the specified character exists. - * As characters are encountered, more pages - * in this table are dynamically added. The - * contents of each page is a bitmask - * consisting of FONTMAP_BITSPERPAGE bits, - * representing whether this font can be used - * to display the given character at the - * corresponding bit position. The high bits - * of the character are used to pick which - * page of the table is used. */ -} FontFamily; - -/* - * The following structure encapsulates an individual screen font. A font - * object is made up of however many SubFonts are necessary to display a - * stream of multilingual characters. - */ - -typedef struct SubFont { - char **fontMap; /* Pointer to font map from the FontFamily, - * cached here to save a dereference. */ - FontFamily *familyPtr; /* The FontFamily for this SubFont. */ -} SubFont; - -/* - * The following structure represents Macintosh's implementation of a font - * object. - */ - -#define SUBFONT_SPACE 3 - -typedef struct MacFont { - TkFont font; /* Stuff used by generic font package. Must - * be first in structure. */ - SubFont staticSubFonts[SUBFONT_SPACE]; - /* Builtin space for a limited number of - * SubFonts. */ - int numSubFonts; /* Length of following array. */ - SubFont *subFontArray; /* Array of SubFonts that have been loaded - * in order to draw/measure all the characters - * encountered by this font so far. All fonts - * start off with one SubFont initialized by - * AllocFont() from the original set of font - * attributes. Usually points to - * staticSubFonts, but may point to malloced - * space if there are lots of SubFonts. */ - - short size; /* Font size in pixels, constructed from - * font attributes. */ - short style; /* Style bits, constructed from font - * attributes. */ -} MacFont; - -/* - * The following structure is used to map between the UTF-8 name for a font and - * the name that the Macintosh uses to refer to the font, in order to determine - * if a font exists. The Macintosh names for fonts are stored in the encoding - * of the font itself. - */ - -typedef struct FontNameMap { - Tk_Uid utfName; /* The name of the font in UTF-8. */ - StringPtr nativeName; /* The name of the font in the font's encoding. */ - short faceNum; /* Unique face number for this font. */ -} FontNameMap; - -/* - * The list of font families that are currently loaded. As screen fonts - * are loaded, this list grows to hold information about what characters - * exist in each font family. - */ - -static FontFamily *fontFamilyList = NULL; - -/* - * Information cached about the system at startup time. - */ - -static FontNameMap *gFontNameMap = NULL; -static GWorldPtr gWorld = NULL; - -/* - * Procedures used only in this file. - */ - -static FontFamily * AllocFontFamily(CONST MacFont *fontPtr, int family); -static SubFont * CanUseFallback(MacFont *fontPtr, - CONST char *fallbackName, int ch); -static SubFont * CanUseFallbackWithAliases(MacFont *fontPtr, - CONST char *faceName, int ch, Tcl_DString *nameTriedPtr); -static SubFont * FindSubFontForChar(MacFont *fontPtr, int ch); -static void FontMapInsert(SubFont *subFontPtr, int ch); -static void FontMapLoadPage(SubFont *subFontPtr, int row); -static int FontMapLookup(SubFont *subFontPtr, int ch); -static void FreeFontFamily(FontFamily *familyPtr); -static void InitFont(Tk_Window tkwin, int family, int size, - int style, MacFont *fontPtr); -static void InitSubFont(CONST MacFont *fontPtr, int family, - SubFont *subFontPtr); -static void MultiFontDrawText(MacFont *fontPtr, - CONST char *source, int numBytes, int x, int y); -static void ReleaseFont(MacFont *fontPtr); -static void ReleaseSubFont(SubFont *subFontPtr); -static int SeenName(CONST char *name, Tcl_DString *dsPtr); - -static CONST char * BreakLine(FontFamily *familyPtr, int flags, - CONST char *source, int numBytes, int *widthPtr); -static int GetFamilyNum(CONST char *faceName, short *familyPtr); -static int GetFamilyOrAliasNum(CONST char *faceName, - short *familyPtr); -static Tcl_Encoding GetFontEncoding(int faceNum, int allowSymbol, - int *isSymbolPtr); -static Tk_Uid GetUtfFaceName(StringPtr faceNameStr); - - -/* - *------------------------------------------------------------------------- - * - * TkpFontPkgInit -- - * - * This procedure is called when an application is created. It - * initializes all the structures that are used by the - * platform-dependant code on a per application basis. - * - * Results: - * None. - * - * Side effects: - * See comments below. - * - *------------------------------------------------------------------------- - */ - -void -TkpFontPkgInit(mainPtr) - TkMainInfo *mainPtr; /* The application being created. */ -{ - MenuHandle fontMenu; - FontNameMap *tmpFontNameMap, *newFontNameMap, *mapPtr; - int i, j, numFonts, fontMapOffset, isSymbol; - Str255 nativeName; - Tcl_DString ds; - Tcl_Encoding encoding; - Tcl_Encoding *encodings; - - if (gWorld == NULL) { - /* - * Do the following one time only. - */ - - Rect rect = {0, 0, 1, 1}; - - SetFractEnable(0); - - /* - * Used for saving and restoring state while drawing and measuring. - */ - - if (NewGWorld(&gWorld, 0, &rect, NULL, NULL, 0) != noErr) { - panic("TkpFontPkgInit: NewGWorld failed"); - } - - /* - * The name of each font is stored in the encoding of that font. - * How would we translate a name from UTF-8 into the native encoding - * of the font unless we knew the encoding of that font? We can't. - * So, precompute the UTF-8 and native names of all fonts on the - * system. The when the user asks for font by its UTF-8 name, we - * lookup the name in that table and really ask for the font by its - * native name. Any unknown UTF-8 names will be mapped to the system - * font. - */ - - fontMenu = NewMenu('FT', "\px"); - AppendResMenu(fontMenu, 'FONT'); - - numFonts = CountMItems(fontMenu); - tmpFontNameMap = (FontNameMap *) ckalloc(sizeof(FontNameMap) * numFonts); - encodings = (Tcl_Encoding *) ckalloc(sizeof(Tcl_Encoding) * numFonts); - - mapPtr = tmpFontNameMap; - for (i = 0; i < numFonts; i++) { - GetMenuItemText(fontMenu, i + 1, nativeName); - GetFNum(nativeName, &mapPtr->faceNum); - encodings[i] = GetFontEncoding(mapPtr->faceNum, 0, &isSymbol); - Tcl_ExternalToUtfDString(encodings[i], StrBody(nativeName), - StrLength(nativeName), &ds); - mapPtr->utfName = Tk_GetUid(Tcl_DStringValue(&ds)); - mapPtr->nativeName = (StringPtr) ckalloc(StrLength(nativeName) + 1); - memcpy(mapPtr->nativeName, nativeName, StrLength(nativeName) + 1); - Tcl_DStringFree(&ds); - mapPtr++; - } - DisposeMenu(fontMenu); - - /* - * Reorder FontNameMap so fonts with the preferred encodings are at - * the front of the list. The relative order of fonts that all have - * the same encoding is preserved. Fonts with unknown encodings get - * stuck at the end. - */ - - newFontNameMap = (FontNameMap *) ckalloc(sizeof(FontNameMap) * (numFonts + 1)); - fontMapOffset = 0; - for (i = 0; encodingList[i] != NULL; i++) { - encoding = Tcl_GetEncoding(NULL, encodingList[i]); - if (encoding == NULL) { - continue; - } - for (j = 0; j < numFonts; j++) { - if (encodings[j] == encoding) { - newFontNameMap[fontMapOffset] = tmpFontNameMap[j]; - fontMapOffset++; - Tcl_FreeEncoding(encodings[j]); - tmpFontNameMap[j].utfName = NULL; - } - } - Tcl_FreeEncoding(encoding); - } - for (i = 0; i < numFonts; i++) { - if (tmpFontNameMap[i].utfName != NULL) { - newFontNameMap[fontMapOffset] = tmpFontNameMap[i]; - fontMapOffset++; - Tcl_FreeEncoding(encodings[i]); - } - } - if (fontMapOffset != numFonts) { - panic("TkpFontPkgInit: unexpected number of fonts"); - } - - mapPtr = &newFontNameMap[numFonts]; - mapPtr->utfName = NULL; - mapPtr->nativeName = NULL; - mapPtr->faceNum = 0; - - ckfree((char *) tmpFontNameMap); - ckfree((char *) encodings); - - gFontNameMap = newFontNameMap; - } -} - -/* - *--------------------------------------------------------------------------- - * - * TkpGetNativeFont -- - * - * Map a platform-specific native font name to a TkFont. - * - * Results: - * The return value is a pointer to a TkFont that represents the - * native font. If a native font by the given name could not be - * found, the return value is NULL. - * - * Every call to this procedure returns a new TkFont structure, - * even if the name has already been seen before. The caller should - * call TkpDeleteFont() when the font is no longer needed. - * - * The caller is responsible for initializing the memory associated - * with the generic TkFont when this function returns and releasing - * the contents of the generics TkFont before calling TkpDeleteFont(). - * - * Side effects: - * None. - * - *--------------------------------------------------------------------------- - */ - -TkFont * -TkpGetNativeFont( - Tk_Window tkwin, /* For display where font will be used. */ - CONST char *name) /* Platform-specific font name. */ -{ - short family; - MacFont *fontPtr; - - if (strcmp(name, "system") == 0) { - family = GetSysFont(); - } else if (strcmp(name, "application") == 0) { - family = GetAppFont(); - } else { - return NULL; - } - - fontPtr = (MacFont *) ckalloc(sizeof(MacFont)); - InitFont(tkwin, family, 0, 0, fontPtr); - - return (TkFont *) fontPtr; -} - -/* - *--------------------------------------------------------------------------- - * - * TkpGetFontFromAttributes -- - * - * Given a desired set of attributes for a font, find a font with - * the closest matching attributes. - * - * Results: - * The return value is a pointer to a TkFont that represents the - * font with the desired attributes. If a font with the desired - * attributes could not be constructed, some other font will be - * substituted automatically. - * - * Every call to this procedure returns a new TkFont structure, - * even if the specified attributes have already been seen before. - * The caller should call TkpDeleteFont() to free the platform- - * specific data when the font is no longer needed. - * - * The caller is responsible for initializing the memory associated - * with the generic TkFont when this function returns and releasing - * the contents of the generic TkFont before calling TkpDeleteFont(). - * - * Side effects: - * None. - * - *--------------------------------------------------------------------------- - */ -TkFont * -TkpGetFontFromAttributes( - TkFont *tkFontPtr, /* If non-NULL, store the information in - * this existing TkFont structure, rather than - * allocating a new structure to hold the - * font; the existing contents of the font - * will be released. If NULL, a new TkFont - * structure is allocated. */ - Tk_Window tkwin, /* For display where font will be used. */ - CONST TkFontAttributes *faPtr) - /* Set of attributes to match. */ -{ - short faceNum, style; - int i, j; - CONST char *faceName; - char *fallback; - char ***fallbacks; - MacFont *fontPtr; - - /* - * Algorithm to get the closest font to the one requested. - * - * try fontname - * try all aliases for fontname - * foreach fallback for fontname - * try the fallback - * try all aliases for the fallback - */ - - faceNum = 0; - faceName = faPtr->family; - if (faceName != NULL) { - if (GetFamilyOrAliasNum(faceName, &faceNum) != 0) { - goto found; - } - fallbacks = TkFontGetFallbacks(); - for (i = 0; fallbacks[i] != NULL; i++) { - for (j = 0; (fallback = fallbacks[i][j]) != NULL; j++) { - if (strcasecmp(faceName, fallback) == 0) { - for (j = 0; (fallback = fallbacks[i][j]) != NULL; j++) { - if (GetFamilyOrAliasNum(fallback, &faceNum)) { - goto found; - } - } - } - break; - } - } - } - - found: - style = 0; - if (faPtr->weight != TK_FW_NORMAL) { - style |= bold; - } - if (faPtr->slant != TK_FS_ROMAN) { - style |= italic; - } - if (faPtr->underline) { - style |= underline; - } - if (tkFontPtr == NULL) { - fontPtr = (MacFont *) ckalloc(sizeof(MacFont)); - } else { - fontPtr = (MacFont *) tkFontPtr; - ReleaseFont(fontPtr); - } - InitFont(tkwin, faceNum, faPtr->size, style, fontPtr); - - return (TkFont *) fontPtr; -} - -/* - *--------------------------------------------------------------------------- - * - * TkpDeleteFont -- - * - * Called to release a font allocated by TkpGetNativeFont() or - * TkpGetFontFromAttributes(). The caller should have already - * released the fields of the TkFont that are used exclusively by - * the generic TkFont code. - * - * Results: - * None. - * - * Side effects: - * TkFont is deallocated. - * - *--------------------------------------------------------------------------- - */ - -void -TkpDeleteFont( - TkFont *tkFontPtr) /* Token of font to be deleted. */ -{ - MacFont *fontPtr; - - fontPtr = (MacFont *) tkFontPtr; - ReleaseFont(fontPtr); -} - -/* - *--------------------------------------------------------------------------- - * - * TkpGetFontFamilies -- - * - * Return information about the font families that are available - * on the display of the given window. - * - * Results: - * Modifies interp's result object to hold a list of all the available - * font families. - * - * Side effects: - * None. - * - *--------------------------------------------------------------------------- - */ - -void -TkpGetFontFamilies( - Tcl_Interp *interp, /* Interp to hold result. */ - Tk_Window tkwin) /* For display to query. */ -{ - FontNameMap *mapPtr; - Tcl_Obj *resultPtr, *strPtr; - - resultPtr = Tcl_GetObjResult(interp); - for (mapPtr = gFontNameMap; mapPtr->utfName != NULL; mapPtr++) { - strPtr = Tcl_NewStringObj(mapPtr->utfName, -1); - Tcl_ListObjAppendElement(NULL, resultPtr, strPtr); - } -} - -/* - *------------------------------------------------------------------------- - * - * TkpGetSubFonts -- - * - * A function used by the testing package for querying the actual - * screen fonts that make up a font object. - * - * Results: - * Modifies interp's result object to hold a list containing the - * names of the screen fonts that make up the given font object. - * - * Side effects: - * None. - * - *------------------------------------------------------------------------- - */ - -void -TkpGetSubFonts(interp, tkfont) - Tcl_Interp *interp; /* Interp to hold result. */ - Tk_Font tkfont; /* Font object to query. */ -{ - int i; - Tcl_Obj *resultPtr, *strPtr; - MacFont *fontPtr; - FontFamily *familyPtr; - Str255 nativeName; - - resultPtr = Tcl_GetObjResult(interp); - fontPtr = (MacFont *) tkfont; - for (i = 0; i < fontPtr->numSubFonts; i++) { - familyPtr = fontPtr->subFontArray[i].familyPtr; - GetFontName(familyPtr->faceNum, nativeName); - strPtr = Tcl_NewStringObj(GetUtfFaceName(nativeName), -1); - Tcl_ListObjAppendElement(NULL, resultPtr, strPtr); - } -} - -/* - *--------------------------------------------------------------------------- - * - * Tk_MeasureChars -- - * - * Determine the number of characters from the string that will fit - * in the given horizontal span. The measurement is done under the - * assumption that Tk_DrawChars() will be used to actually display - * the characters. - * - * Results: - * The return value is the number of bytes from source that - * fit into the span that extends from 0 to maxLength. *lengthPtr is - * filled with the x-coordinate of the right edge of the last - * character that did fit. - * - * Side effects: - * None. - * - *--------------------------------------------------------------------------- - */ - -int -Tk_MeasureChars( - Tk_Font tkfont, /* Font in which characters will be drawn. */ - CONST char *source, /* UTF-8 string to be displayed. Need not be - * '\0' terminated. */ - int numBytes, /* Maximum number of bytes to consider - * from source string. */ - int maxLength, /* If >= 0, maxLength specifies the longest - * permissible line length; don't consider any - * character that would cross this - * x-position. If < 0, then line length is - * unbounded and the flags argument is - * ignored. */ - int flags, /* Various flag bits OR-ed together: - * TK_PARTIAL_OK means include the last char - * which only partially fit on this line. - * TK_WHOLE_WORDS means stop on a word - * boundary, if possible. - * TK_AT_LEAST_ONE means return at least one - * character even if no characters fit. */ - int *lengthPtr) /* Filled with x-location just after the - * terminating character. */ -{ - MacFont *fontPtr; - FontFamily *lastFamilyPtr; - CGrafPtr saveWorld; - GDHandle saveDevice; - int curX, curByte; - - /* - * According to "Inside Macintosh: Text", the Macintosh may - * automatically substitute - * ligatures or context-sensitive presentation forms when - * measuring/displaying text within a font run. We cannot safely - * measure individual characters and add up the widths w/o errors. - * However, if we convert a range of text from UTF-8 to, say, - * Shift-JIS, and get the offset into the Shift-JIS string as to - * where a word or line break would occur, then can we map that - * number back to UTF-8? - */ - - fontPtr = (MacFont *) tkfont; - - GetGWorld(&saveWorld, &saveDevice); - SetGWorld(gWorld, NULL); - - TextSize(fontPtr->size); - TextFace(fontPtr->style); - - lastFamilyPtr = fontPtr->subFontArray[0].familyPtr; - - if (numBytes == 0) { - curX = 0; - curByte = 0; - } else if (maxLength < 0) { - CONST char *p, *end, *next; - Tcl_UniChar ch; - FontFamily *thisFamilyPtr; - Tcl_DString runString; - - /* - * A three step process: - * 1. Find a contiguous range of characters that can all be - * represented by a single screen font. - * 2. Convert those chars to the encoding of that font. - * 3. Measure converted chars. - */ - - curX = 0; - end = source + numBytes; - for (p = source; p < end; ) { - next = p + Tcl_UtfToUniChar(p, &ch); - thisFamilyPtr = FindSubFontForChar(fontPtr, ch)->familyPtr; - if (thisFamilyPtr != lastFamilyPtr) { - TextFont(lastFamilyPtr->faceNum); - Tcl_UtfToExternalDString(lastFamilyPtr->encoding, source, - p - source, &runString); - curX += TextWidth(Tcl_DStringValue(&runString), 0, - Tcl_DStringLength(&runString)); - Tcl_DStringFree(&runString); - lastFamilyPtr = thisFamilyPtr; - source = p; - } - p = next; - } - TextFont(lastFamilyPtr->faceNum); - Tcl_UtfToExternalDString(lastFamilyPtr->encoding, source, p - source, - &runString); - curX += TextWidth(Tcl_DStringValue(&runString), 0, - Tcl_DStringLength(&runString)); - Tcl_DStringFree(&runString); - curByte = numBytes; - } else { - CONST char *p, *end, *next, *sourceOrig; - int widthLeft; - FontFamily *thisFamilyPtr; - Tcl_UniChar ch; - CONST char *rest; - - /* - * How many chars will fit in the space allotted? - */ - - if (maxLength > 32767) { - maxLength = 32767; - } - - widthLeft = maxLength; - sourceOrig = source; - end = source + numBytes; - for (p = source; p < end; p = next) { - next = p + Tcl_UtfToUniChar(p, &ch); - thisFamilyPtr = FindSubFontForChar(fontPtr, ch)->familyPtr; - if (thisFamilyPtr != lastFamilyPtr) { - if (p > source) { - rest = BreakLine(lastFamilyPtr, flags, source, - p - source, &widthLeft); - flags &= ~TK_AT_LEAST_ONE; - if (rest != NULL) { - p = source; - break; - } - } - lastFamilyPtr = thisFamilyPtr; - source = p; - } - } - - if (p > source) { - rest = BreakLine(lastFamilyPtr, flags, source, p - source, - &widthLeft); - } - - if (rest == NULL) { - curByte = numBytes; - } else { - curByte = rest - sourceOrig; - } - curX = maxLength - widthLeft; - } - - SetGWorld(saveWorld, saveDevice); - - *lengthPtr = curX; - return curByte; -} - -/* - *--------------------------------------------------------------------------- - * - * BreakLine -- - * - * Determine where the given line of text should be broken so that it - * fits in the specified range. Before calling this function, the - * font values and graphics port must be set. - * - * Results: - * The return value is NULL if the specified range is larger that the - * space the text needs, and *widthLeftPtr is filled with how much - * space is left in the range after measuring the whole text buffer. - * Otherwise, the return value is a pointer into the text buffer that - * indicates where the line should be broken (up to, but not including - * that character), and *widthLeftPtr is filled with how much space is - * left in the range after measuring up to that character. - * - * Side effects: - * None. - * - *--------------------------------------------------------------------------- - */ - -static CONST char * -BreakLine( - FontFamily *familyPtr, /* FontFamily that describes the font values - * that are already selected into the graphics - * port. */ - int flags, /* Various flag bits OR-ed together: - * TK_PARTIAL_OK means include the last char - * which only partially fit on this line. - * TK_WHOLE_WORDS means stop on a word - * boundary, if possible. - * TK_AT_LEAST_ONE means return at least one - * character even if no characters fit. */ - CONST char *source, /* UTF-8 string to be displayed. Need not be - * '\0' terminated. */ - int numBytes, /* Maximum number of bytes to consider - * from source string. */ - int *widthLeftPtr) /* On input, specifies size of range into - * which characters from source buffer should - * be fit. On output, filled with how much - * space is left after fitting as many - * characters as possible into the range. - * Result may be negative if TK_AT_LEAST_ONE - * was specified in the flags argument. */ -{ - Fixed pixelWidth, widthLeft; - StyledLineBreakCode breakCode; - Tcl_DString runString; - long textOffset; - Boolean leadingEdge; - Point point; - int charOffset, thisCharWasDoubleByte; - char *p, *end, *typeTable; - - TextFont(familyPtr->faceNum); - Tcl_UtfToExternalDString(familyPtr->encoding, source, numBytes, - &runString); - pixelWidth = Int2Fixed(*widthLeftPtr) + 1; - if (flags & TK_WHOLE_WORDS) { - textOffset = (flags & TK_AT_LEAST_ONE); - widthLeft = pixelWidth; - breakCode = StyledLineBreak(Tcl_DStringValue(&runString), - Tcl_DStringLength(&runString), 0, Tcl_DStringLength(&runString), - 0, &widthLeft, &textOffset); - if (breakCode != smBreakOverflow) { - /* - * StyledLineBreak includes all the space characters at the end of - * line that we want to suppress. - */ - - textOffset = VisibleLength(Tcl_DStringValue(&runString), textOffset); - goto getoffset; - } - } else { - point.v = 1; - point.h = 1; - textOffset = PixelToChar(Tcl_DStringValue(&runString), - Tcl_DStringLength(&runString), 0, pixelWidth, &leadingEdge, - &widthLeft, smOnlyStyleRun, point, point); - if (Fixed2Int(widthLeft) < 0) { - goto getoffset; - } - } - *widthLeftPtr = Fixed2Int(widthLeft); - Tcl_DStringFree(&runString); - return NULL; - - /* - * The conversion routine that converts UTF-8 to the target encoding - * must map one UTF-8 character to exactly one encoding-specific - * character, so that the following algorithm works: - * - * 1. Get byte offset of where line should be broken. - * 2. Get char offset corresponding to that byte offset. - * 3. Map that char offset to byte offset in UTF-8 string. - */ - - getoffset: - thisCharWasDoubleByte = 0; - if (familyPtr->isMultiByteFont == 0) { - charOffset = textOffset; - } else { - charOffset = 0; - typeTable = familyPtr->typeTable; - - p = Tcl_DStringValue(&runString); - end = p + textOffset; - thisCharWasDoubleByte = typeTable[*((unsigned char *) p)]; - for ( ; p < end; p++) { - thisCharWasDoubleByte = typeTable[*((unsigned char *) p)]; - p += thisCharWasDoubleByte; - charOffset++; - } - } - - if ((flags & TK_WHOLE_WORDS) == 0) { - if ((flags & TK_PARTIAL_OK) && (leadingEdge != 0)) { - textOffset += thisCharWasDoubleByte; - textOffset++; - charOffset++; - } else if (((flags & TK_PARTIAL_OK) == 0) && (leadingEdge == 0)) { - textOffset -= thisCharWasDoubleByte; - textOffset--; - charOffset--; - } - } - if ((textOffset == 0) && (Tcl_DStringLength(&runString) > 0) - && (flags & TK_AT_LEAST_ONE)) { - p = Tcl_DStringValue(&runString); - textOffset += familyPtr->typeTable[*((unsigned char *) p)]; - textOffset++; - charOffset++; - } - *widthLeftPtr = Fixed2Int(pixelWidth) - - TextWidth(Tcl_DStringValue(&runString), 0, textOffset); - Tcl_DStringFree(&runString); - return Tcl_UtfAtIndex(source, charOffset); -} - -/* - *--------------------------------------------------------------------------- - * - * Tk_DrawChars -- - * - * Draw a string of characters on the screen. - * - * Results: - * None. - * - * Side effects: - * Information gets drawn on the screen. - * - *--------------------------------------------------------------------------- - */ - -void -Tk_DrawChars( - Display *display, /* Display on which to draw. */ - Drawable drawable, /* Window or pixmap in which to draw. */ - GC gc, /* Graphics context for drawing characters. */ - Tk_Font tkfont, /* Font in which characters will be drawn; - * must be the same as font used in GC. */ - CONST char *source, /* UTF-8 string to be displayed. Need not be - * '\0' terminated. All Tk meta-characters - * (tabs, control characters, and newlines) - * should be stripped out of the string that - * is passed to this function. If they are - * not stripped out, they will be displayed as - * regular printing characters. */ - int numBytes, /* Number of bytes in string. */ - int x, int y) /* Coordinates at which to place origin of - * string when drawing. */ -{ - MacFont *fontPtr; - MacDrawable *macWin; - RGBColor macColor, origColor; - GWorldPtr destPort; - CGrafPtr saveWorld; - GDHandle saveDevice; - short txFont, txFace, txSize; - BitMapPtr stippleMap; - - fontPtr = (MacFont *) tkfont; - macWin = (MacDrawable *) drawable; - - destPort = TkMacGetDrawablePort(drawable); - GetGWorld(&saveWorld, &saveDevice); - SetGWorld(destPort, NULL); - - TkMacSetUpClippingRgn(drawable); - TkMacSetUpGraphicsPort(gc); - - txFont = tcl_macQdPtr->thePort->txFont; - txFace = tcl_macQdPtr->thePort->txFace; - txSize = tcl_macQdPtr->thePort->txSize; - GetForeColor(&origColor); - - if ((gc->fill_style == FillStippled - || gc->fill_style == FillOpaqueStippled) - && gc->stipple != None) { - Pixmap pixmap; - GWorldPtr bufferPort; - - stippleMap = TkMacMakeStippleMap(drawable, gc->stipple); - - pixmap = Tk_GetPixmap(display, drawable, - stippleMap->bounds.right, stippleMap->bounds.bottom, 0); - - bufferPort = TkMacGetDrawablePort(pixmap); - SetGWorld(bufferPort, NULL); - - if (TkSetMacColor(gc->foreground, &macColor) == true) { - RGBForeColor(&macColor); - } - ShowPen(); - FillRect(&stippleMap->bounds, &tcl_macQdPtr->white); - MultiFontDrawText(fontPtr, source, numBytes, 0, 0); - - SetGWorld(destPort, NULL); - CopyDeepMask(&((GrafPtr) bufferPort)->portBits, stippleMap, - &((GrafPtr) destPort)->portBits, &stippleMap->bounds, - &stippleMap->bounds, &((GrafPtr) destPort)->portRect, - srcOr, NULL); - - /* TODO: this doesn't work quite right - it does a blend. you can't - * draw white text when you have a stipple. - */ - - Tk_FreePixmap(display, pixmap); - ckfree(stippleMap->baseAddr); - ckfree((char *)stippleMap); - } else { - if (TkSetMacColor(gc->foreground, &macColor) == true) { - RGBForeColor(&macColor); - } - ShowPen(); - MultiFontDrawText(fontPtr, source, numBytes, macWin->xOff + x, - macWin->yOff + y); - } - - TextFont(txFont); - TextSize(txSize); - TextFace(txFace); - RGBForeColor(&origColor); - SetGWorld(saveWorld, saveDevice); -} - -/* - *------------------------------------------------------------------------- - * - * MultiFontDrawText -- - * - * Helper function for Tk_DrawChars. Draws characters, using the - * various screen fonts in fontPtr to draw multilingual characters. - * Note: No bidirectional support. - * - * Results: - * None. - * - * Side effects: - * Information gets drawn on the screen. - * Contents of fontPtr may be modified if more subfonts were loaded - * in order to draw all the multilingual characters in the given - * string. - * - *------------------------------------------------------------------------- - */ - -static void -MultiFontDrawText( - MacFont *fontPtr, /* Contains set of fonts to use when drawing - * following string. */ - CONST char *source, /* Potentially multilingual UTF-8 string. */ - int numBytes, /* Length of string in bytes. */ - int x, int y) /* Coordinates at which to place origin * - * of string when drawing. */ -{ - FontFamily *lastFamilyPtr, *thisFamilyPtr; - Tcl_DString runString; - CONST char *p, *end, *next; - Tcl_UniChar ch; - - TextSize(fontPtr->size); - TextFace(fontPtr->style); - - lastFamilyPtr = fontPtr->subFontArray[0].familyPtr; - - end = source + numBytes; - for (p = source; p < end; ) { - next = p + Tcl_UtfToUniChar(p, &ch); - thisFamilyPtr = FindSubFontForChar(fontPtr, ch)->familyPtr; - if (thisFamilyPtr != lastFamilyPtr) { - if (p > source) { - TextFont(lastFamilyPtr->faceNum); - Tcl_UtfToExternalDString(lastFamilyPtr->encoding, source, - p - source, &runString); - MoveTo((short) x, (short) y); - DrawText(Tcl_DStringValue(&runString), 0, - Tcl_DStringLength(&runString)); - x += TextWidth(Tcl_DStringValue(&runString), 0, - Tcl_DStringLength(&runString)); - Tcl_DStringFree(&runString); - source = p; - } - lastFamilyPtr = thisFamilyPtr; - } - p = next; - } - if (p > source) { - TextFont(thisFamilyPtr->faceNum); - Tcl_UtfToExternalDString(lastFamilyPtr->encoding, source, - p - source, &runString); - MoveTo((short) x, (short) y); - DrawText(Tcl_DStringValue(&runString), 0, - Tcl_DStringLength(&runString)); - Tcl_DStringFree(&runString); - } -} - -/* - *--------------------------------------------------------------------------- - * - * TkMacIsCharacterMissing -- - * - * Given a tkFont and a character determines whether the character has - * a glyph defined in the font or not. Note that this is potentially - * not compatible with Mac OS 8 as it looks at the font handle - * structure directly. Looks into the character array of the font - * handle to determine whether the glyph is defined or not. - * - * Results: - * Returns a 1 if the character is missing, a 0 if it is not. - * - * Side effects: - * None. - * - *--------------------------------------------------------------------------- - */ - -int -TkMacIsCharacterMissing( - Tk_Font tkfont, /* The font we are looking in. */ - unsigned int searchChar) /* The character we are looking for. */ -{ - MacFont *fontPtr = (MacFont *) tkfont; - FMInput fm; - FontRec **fontRecHandle; - - fm.family = fontPtr->subFontArray[0].familyPtr->faceNum; - fm.size = fontPtr->size; - fm.face = fontPtr->style; - fm.needBits = 0; - fm.device = 0; - fm.numer.h = fm.numer.v = fm.denom.h = fm.denom.v = 1; - -#if !defined(UNIVERSAL_INTERFACES_VERSION) || (UNIVERSAL_INTERFACES_VERSION < 0x0300) - fontRecHandle = (FontRec **) FMSwapFont(&fm)->fontResult; -#else - fontRecHandle = (FontRec **) FMSwapFont(&fm)->fontHandle; -#endif - return *(short *) ((long) &(*fontRecHandle)->owTLoc - + ((long)((*fontRecHandle)->owTLoc + searchChar - - (*fontRecHandle)->firstChar) * sizeof(short))) == -1; -} - -/* - *--------------------------------------------------------------------------- - * - * InitFont -- - * - * Helper for TkpGetNativeFont() and TkpGetFontFromAttributes(). - * Initializes the memory for a MacFont that wraps the platform-specific - * data. - * - * The caller is responsible for initializing the fields of the - * TkFont that are used exclusively by the generic TkFont code, and - * for releasing those fields before calling TkpDeleteFont(). - * - * Results: - * Fills the MacFont structure. - * - * Side effects: - * Memory allocated. - * - *--------------------------------------------------------------------------- - */ - -static void -InitFont( - Tk_Window tkwin, /* For display where font will be used. */ - int faceNum, /* Macintosh font number. */ - int size, /* Point size for Macintosh font. */ - int style, /* Macintosh style bits. */ - MacFont *fontPtr) /* Filled with information constructed from - * the above arguments. */ -{ - Str255 nativeName; - FontInfo fi; - TkFontAttributes *faPtr; - TkFontMetrics *fmPtr; - CGrafPtr saveWorld; - GDHandle saveDevice; - short pixels; - - if (size == 0) { - size = -GetDefFontSize(); - } - pixels = (short) TkFontGetPixels(tkwin, size); - - GetGWorld(&saveWorld, &saveDevice); - SetGWorld(gWorld, NULL); - TextFont(faceNum); - TextSize(pixels); - TextFace(style); - - GetFontInfo(&fi); - GetFontName(faceNum, nativeName); - - fontPtr->font.fid = (Font) fontPtr; - - faPtr = &fontPtr->font.fa; - faPtr->family = GetUtfFaceName(nativeName); - faPtr->size = TkFontGetPoints(tkwin, size); - faPtr->weight = (style & bold) ? TK_FW_BOLD : TK_FW_NORMAL; - faPtr->slant = (style & italic) ? TK_FS_ITALIC : TK_FS_ROMAN; - faPtr->underline = ((style & underline) != 0); - faPtr->overstrike = 0; - - fmPtr = &fontPtr->font.fm; - fmPtr->ascent = fi.ascent; - fmPtr->descent = fi.descent; - fmPtr->maxWidth = fi.widMax; - fmPtr->fixed = (CharWidth('i') == CharWidth('w')); - - fontPtr->size = pixels; - fontPtr->style = (short) style; - - fontPtr->numSubFonts = 1; - fontPtr->subFontArray = fontPtr->staticSubFonts; - InitSubFont(fontPtr, faceNum, &fontPtr->subFontArray[0]); - - SetGWorld(saveWorld, saveDevice); -} - -/* - *------------------------------------------------------------------------- - * - * ReleaseFont -- - * - * Called to release the Macintosh-specific contents of a TkFont. - * The caller is responsible for freeing the memory used by the - * font itself. - * - * Results: - * None. - * - * Side effects: - * Memory is freed. - * - *--------------------------------------------------------------------------- - */ - -static void -ReleaseFont( - MacFont *fontPtr) /* The font to delete. */ -{ - int i; - - for (i = 0; i < fontPtr->numSubFonts; i++) { - ReleaseSubFont(&fontPtr->subFontArray[i]); - } - if (fontPtr->subFontArray != fontPtr->staticSubFonts) { - ckfree((char *) fontPtr->subFontArray); - } -} - -/* - *------------------------------------------------------------------------- - * - * InitSubFont -- - * - * Wrap a screen font and load the FontFamily that represents - * it. Used to prepare a SubFont so that characters can be mapped - * from UTF-8 to the charset of the font. - * - * Results: - * The subFontPtr is filled with information about the font. - * - * Side effects: - * None. - * - *------------------------------------------------------------------------- - */ - -static void -InitSubFont( - CONST MacFont *fontPtr, /* Font object in which the SubFont will be - * used. */ - int faceNum, /* The font number. */ - SubFont *subFontPtr) /* Filled with SubFont constructed from - * above attributes. */ -{ - subFontPtr->familyPtr = AllocFontFamily(fontPtr, faceNum); - subFontPtr->fontMap = subFontPtr->familyPtr->fontMap; -} - -/* - *------------------------------------------------------------------------- - * - * ReleaseSubFont -- - * - * Called to release the contents of a SubFont. The caller is - * responsible for freeing the memory used by the SubFont itself. - * - * Results: - * None. - * - * Side effects: - * Memory and resources are freed. - * - *--------------------------------------------------------------------------- - */ - -static void -ReleaseSubFont( - SubFont *subFontPtr) /* The SubFont to delete. */ -{ - FreeFontFamily(subFontPtr->familyPtr); -} - -/* - *------------------------------------------------------------------------- - * - * AllocFontFamily -- - * - * Find the FontFamily structure associated with the given font - * family. The information should be stored by the caller in a - * SubFont and used when determining if that SubFont supports a - * character. - * - * Results: - * A pointer to a FontFamily. The reference count in the FontFamily - * is automatically incremented. When the SubFont is released, the - * reference count is decremented. When no SubFont is using this - * FontFamily, it may be deleted. - * - * Side effects: - * A new FontFamily structure will be allocated if this font family - * has not been seen. - * - *------------------------------------------------------------------------- - */ - -static FontFamily * -AllocFontFamily( - CONST MacFont *fontPtr, /* Font object in which the FontFamily will - * be used. */ - int faceNum) /* The font number. */ -{ - FontFamily *familyPtr; - int i; - - familyPtr = fontFamilyList; - for (; familyPtr != NULL; familyPtr = familyPtr->nextPtr) { - if (familyPtr->faceNum == faceNum) { - familyPtr->refCount++; - return familyPtr; - } - } - - familyPtr = (FontFamily *) ckalloc(sizeof(FontFamily)); - memset(familyPtr, 0, sizeof(FontFamily)); - familyPtr->nextPtr = fontFamilyList; - fontFamilyList = familyPtr; - - /* - * Set key for this FontFamily. - */ - - familyPtr->faceNum = faceNum; - - /* - * An initial refCount of 2 means that FontFamily information will - * persist even when the SubFont that loaded the FontFamily is released. - * Change it to 1 to cause FontFamilies to be unloaded when not in use. - */ - - familyPtr->refCount = 2; - familyPtr->encoding = GetFontEncoding(faceNum, 1, &familyPtr->isSymbolFont); - familyPtr->isMultiByteFont = 0; - FillParseTable(familyPtr->typeTable, FontToScript(faceNum)); - for (i = 0; i < 256; i++) { - if (familyPtr->typeTable[i] != 0) { - familyPtr->isMultiByteFont = 1; - break; - } - } - return familyPtr; -} - -/* - *------------------------------------------------------------------------- - * - * FreeFontFamily -- - * - * Called to free a FontFamily when the SubFont is finished using it. - * Frees the contents of the FontFamily and the memory used by the - * FontFamily itself. - * - * Results: - * None. - * - * Side effects: - * None. - * - *------------------------------------------------------------------------- - */ - -static void -FreeFontFamily( - FontFamily *familyPtr) /* The FontFamily to delete. */ -{ - FontFamily **familyPtrPtr; - int i; - - if (familyPtr == NULL) { - return; - } - familyPtr->refCount--; - if (familyPtr->refCount > 0) { - return; - } - Tcl_FreeEncoding(familyPtr->encoding); - for (i = 0; i < FONTMAP_PAGES; i++) { - if (familyPtr->fontMap[i] != NULL) { - ckfree((char *) familyPtr->fontMap[i]); - } - } - - /* - * Delete from list. - */ - - for (familyPtrPtr = &fontFamilyList; ; ) { - if (*familyPtrPtr == familyPtr) { - *familyPtrPtr = familyPtr->nextPtr; - break; - } - familyPtrPtr = &(*familyPtrPtr)->nextPtr; - } - - ckfree((char *) familyPtr); -} - -/* - *------------------------------------------------------------------------- - * - * FindSubFontForChar -- - * - * Determine which physical screen font is necessary to use to - * display the given character. If the font object does not have - * a screen font that can display the character, another screen font - * may be loaded into the font object, following a set of preferred - * fallback rules. - * - * Results: - * The return value is the SubFont to use to display the given - * character. - * - * Side effects: - * The contents of fontPtr are modified to cache the results - * of the lookup and remember any SubFonts that were dynamically - * loaded. - * - *------------------------------------------------------------------------- - */ - -static SubFont * -FindSubFontForChar( - MacFont *fontPtr, /* The font object with which the character - * will be displayed. */ - int ch) /* The Unicode character to be displayed. */ -{ - int i, j, k; - CONST char *fallbackName; - char **aliases; - SubFont *subFontPtr; - FontNameMap *mapPtr; - Tcl_DString faceNames; - char ***fontFallbacks; - char **anyFallbacks; - - if (FontMapLookup(&fontPtr->subFontArray[0], ch)) { - return &fontPtr->subFontArray[0]; - } - - for (i = 1; i < fontPtr->numSubFonts; i++) { - if (FontMapLookup(&fontPtr->subFontArray[i], ch)) { - return &fontPtr->subFontArray[i]; - } - } - - /* - * Keep track of all face names that we check, so we don't check some - * name multiple times if it can be reached by multiple paths. - */ - - Tcl_DStringInit(&faceNames); - - aliases = TkFontGetAliasList(fontPtr->font.fa.family); - - subFontPtr = NULL; - fontFallbacks = TkFontGetFallbacks(); - for (i = 0; fontFallbacks[i] != NULL; i++) { - for (j = 0; fontFallbacks[i][j] != NULL; j++) { - fallbackName = fontFallbacks[i][j]; - if (strcasecmp(fallbackName, fontPtr->font.fa.family) == 0) { - /* - * If the base font has a fallback... - */ - - goto tryfallbacks; - } else if (aliases != NULL) { - /* - * Or if an alias for the base font has a fallback... - */ - - for (k = 0; aliases[k] != NULL; k++) { - if (strcasecmp(aliases[k], fallbackName) == 0) { - goto tryfallbacks; - } - } - } - } - continue; - - /* - * ...then see if we can use one of the fallbacks, or an - * alias for one of the fallbacks. - */ - - tryfallbacks: - for (j = 0; fontFallbacks[i][j] != NULL; j++) { - fallbackName = fontFallbacks[i][j]; - subFontPtr = CanUseFallbackWithAliases(fontPtr, fallbackName, - ch, &faceNames); - if (subFontPtr != NULL) { - goto end; - } - } - } - - /* - * See if we can use something from the global fallback list. - */ - - anyFallbacks = TkFontGetGlobalClass(); - for (i = 0; anyFallbacks[i] != NULL; i++) { - fallbackName = anyFallbacks[i]; - subFontPtr = CanUseFallbackWithAliases(fontPtr, fallbackName, ch, - &faceNames); - if (subFontPtr != NULL) { - goto end; - } - } - - /* - * Try all face names available in the whole system until we - * find one that can be used. - */ - - for (mapPtr = gFontNameMap; mapPtr->utfName != NULL; mapPtr++) { - fallbackName = mapPtr->utfName; - if (SeenName(fallbackName, &faceNames) == 0) { - subFontPtr = CanUseFallback(fontPtr, fallbackName, ch); - if (subFontPtr != NULL) { - goto end; - } - } - } - - end: - Tcl_DStringFree(&faceNames); - - if (subFontPtr == NULL) { - /* - * No font can display this character. We will use the base font - * and have it display the "unknown" character. - */ - - subFontPtr = &fontPtr->subFontArray[0]; - FontMapInsert(subFontPtr, ch); - } - return subFontPtr; -} - -/* - *------------------------------------------------------------------------- - * - * FontMapLookup -- - * - * See if the screen font can display the given character. - * - * Results: - * The return value is 0 if the screen font cannot display the - * character, non-zero otherwise. - * - * Side effects: - * New pages are added to the font mapping cache whenever the - * character belongs to a page that hasn't been seen before. - * When a page is loaded, information about all the characters on - * that page is stored, not just for the single character in - * question. - * - *------------------------------------------------------------------------- - */ - -static int -FontMapLookup( - SubFont *subFontPtr, /* Contains font mapping cache to be queried - * and possibly updated. */ - int ch) /* Character to be tested. */ -{ - int row, bitOffset; - - row = ch >> FONTMAP_SHIFT; - if (subFontPtr->fontMap[row] == NULL) { - FontMapLoadPage(subFontPtr, row); - } - bitOffset = ch & (FONTMAP_BITSPERPAGE - 1); - return (subFontPtr->fontMap[row][bitOffset >> 3] >> (bitOffset & 7)) & 1; -} - -/* - *------------------------------------------------------------------------- - * - * FontMapInsert -- - * - * Tell the font mapping cache that the given screen font should be - * used to display the specified character. This is called when no - * font on the system can be be found that can display that - * character; we lie to the font and tell it that it can display - * the character, otherwise we would end up re-searching the entire - * fallback hierarchy every time that character was seen. - * - * Results: - * None. - * - * Side effects: - * New pages are added to the font mapping cache whenever the - * character belongs to a page that hasn't been seen before. - * When a page is loaded, information about all the characters on - * that page is stored, not just for the single character in - * question. - * - *------------------------------------------------------------------------- - */ - -static void -FontMapInsert( - SubFont *subFontPtr, /* Contains font mapping cache to be - * updated. */ - int ch) /* Character to be added to cache. */ -{ - int row, bitOffset; - - row = ch >> FONTMAP_SHIFT; - if (subFontPtr->fontMap[row] == NULL) { - FontMapLoadPage(subFontPtr, row); - } - bitOffset = ch & (FONTMAP_BITSPERPAGE - 1); - subFontPtr->fontMap[row][bitOffset >> 3] |= 1 << (bitOffset & 7); -} - -/* - *------------------------------------------------------------------------- - * - * FontMapLoadPage -- - * - * Load information about all the characters on a given page. - * This information consists of one bit per character that indicates - * whether the associated HFONT can (1) or cannot (0) display the - * characters on the page. - * - * Results: - * None. - * - * Side effects: - * Mempry allocated. - * - *------------------------------------------------------------------------- - */ -static void -FontMapLoadPage( - SubFont *subFontPtr, /* Contains font mapping cache to be - * updated. */ - int row) /* Index of the page to be loaded into - * the cache. */ -{ - FMInput fm; - FontRec *fontRecPtr; - short *widths; - int i, end, bitOffset, isMultiByteFont; - char src[TCL_UTF_MAX]; - unsigned char buf[16]; - int srcRead, dstWrote; - Tcl_Encoding encoding; - Handle fHandle; - short theID; - ResType theType; - Str255 theName; - - subFontPtr->fontMap[row] = (char *) ckalloc(FONTMAP_BITSPERPAGE / 8); - memset(subFontPtr->fontMap[row], 0, FONTMAP_BITSPERPAGE / 8); - - encoding = subFontPtr->familyPtr->encoding; - - fm.family = subFontPtr->familyPtr->faceNum; - fm.size = 12; - fm.face = 0; - fm.needBits = 0; - fm.device = 0; - fm.numer.h = 1; - fm.numer.v = 1; - fm.denom.h = 1; - fm.denom.v = 1; - -#if !defined(UNIVERSAL_INTERFACES_VERSION) || (UNIVERSAL_INTERFACES_VERSION < 0x0300) - fHandle = FMSwapFont(&fm)->fontHandle; -#else - fHandle = FMSwapFont(&fm)->fontHandle; -#endif - GetResInfo(fHandle, &theID, &theType, theName); - isMultiByteFont = subFontPtr->familyPtr->isMultiByteFont; - if( theType=='sfnt' ) { - /* - * Found an outline font which has very complex font record. - * Let's just assume *ALL* the characters are allowed. - */ - - end = (row + 1) << FONTMAP_SHIFT; - for (i = row << FONTMAP_SHIFT; i < end; i++) { - if (Tcl_UtfToExternal(NULL, encoding, src, Tcl_UniCharToUtf(i, - src), - TCL_ENCODING_STOPONERROR, NULL, (char *) buf, - sizeof(buf), - &srcRead, &dstWrote, NULL) == TCL_OK) { - bitOffset = i & (FONTMAP_BITSPERPAGE - 1); - subFontPtr->fontMap[row][bitOffset >> 3] |= 1 - << (bitOffset & 7); - } - } - } else { - /* - * Found an old bitmap font which has a well-defined record. - * We can check the width table to see which characters exist. - */ - - fontRecPtr = *((FontRec **) fHandle ); - widths = (short *) ((long) &fontRecPtr->owTLoc - + ((long) (fontRecPtr->owTLoc - fontRecPtr->firstChar) - * sizeof(short))); - - end = (row + 1) << FONTMAP_SHIFT; - for (i = row << FONTMAP_SHIFT; i < end; i++) { - if (Tcl_UtfToExternal(NULL, encoding, src, - Tcl_UniCharToUtf(i, src), - TCL_ENCODING_STOPONERROR, NULL, (char *) buf, sizeof(buf), - &srcRead, &dstWrote, NULL) == TCL_OK) { - - if (((isMultiByteFont != 0) && (buf[0] > 31)) - || (widths[buf[0]] != -1)) { - if ((buf[0] == 0x11) && (widths[0x12] == -1)) { - continue; - } - - /* - * Mac's char existence metrics are only for one-byte - * characters. If we have a double-byte char, just - * assume that the font supports that char if the font's - * encoding supports that char. - */ - - bitOffset = i & (FONTMAP_BITSPERPAGE - 1); - subFontPtr->fontMap[row][bitOffset >> 3] |= 1 - << (bitOffset & 7); - } - } - } - } -} - -/* - *--------------------------------------------------------------------------- - * - * CanUseFallbackWithAliases -- - * - * Helper function for FindSubFontForChar. Determine if the - * specified face name (or an alias of the specified face name) - * can be used to construct a screen font that can display the - * given character. - * - * Results: - * See CanUseFallback(). - * - * Side effects: - * If the name and/or one of its aliases was rejected, the - * rejected string is recorded in nameTriedPtr so that it won't - * be tried again. - * - *--------------------------------------------------------------------------- - */ - -static SubFont * -CanUseFallbackWithAliases( - MacFont *fontPtr, /* The font object that will own the new - * screen font. */ - CONST char *faceName, /* Desired face name for new screen font. */ - int ch, /* The Unicode character that the new - * screen font must be able to display. */ - Tcl_DString *nameTriedPtr) /* Records face names that have already - * been tried. It is possible for the same - * face name to be queried multiple times when - * trying to find a suitable screen font. */ -{ - SubFont *subFontPtr; - char **aliases; - int i; - - if (SeenName(faceName, nameTriedPtr) == 0) { - subFontPtr = CanUseFallback(fontPtr, faceName, ch); - if (subFontPtr != NULL) { - return subFontPtr; - } - } - aliases = TkFontGetAliasList(faceName); - if (aliases != NULL) { - for (i = 0; aliases[i] != NULL; i++) { - if (SeenName(aliases[i], nameTriedPtr) == 0) { - subFontPtr = CanUseFallback(fontPtr, aliases[i], ch); - if (subFontPtr != NULL) { - return subFontPtr; - } - } - } - } - return NULL; -} - -/* - *--------------------------------------------------------------------------- - * - * SeenName -- - * - * Used to determine we have already tried and rejected the given - * face name when looking for a screen font that can support some - * Unicode character. - * - * Results: - * The return value is 0 if this face name has not already been seen, - * non-zero otherwise. - * - * Side effects: - * None. - * - *--------------------------------------------------------------------------- - */ - -static int -SeenName( - CONST char *name, /* The name to check. */ - Tcl_DString *dsPtr) /* Contains names that have already been - * seen. */ -{ - CONST char *seen, *end; - - seen = Tcl_DStringValue(dsPtr); - end = seen + Tcl_DStringLength(dsPtr); - while (seen < end) { - if (strcasecmp(seen, name) == 0) { - return 1; - } - seen += strlen(seen) + 1; - } - Tcl_DStringAppend(dsPtr, (char *) name, (int) (strlen(name) + 1)); - return 0; -} - -/* - *------------------------------------------------------------------------- - * - * CanUseFallback -- - * - * If the specified physical screen font has not already been loaded - * into the font object, determine if the specified physical screen - * font can display the given character. - * - * Results: - * The return value is a pointer to a newly allocated SubFont, owned - * by the font object. This SubFont can be used to display the given - * character. The SubFont represents the screen font with the base set - * of font attributes from the font object, but using the specified - * font name. NULL is returned if the font object already holds - * a reference to the specified physical font or if the specified - * physical font cannot display the given character. - * - * Side effects: - * The font object's subFontArray is updated to contain a reference - * to the newly allocated SubFont. - * - *------------------------------------------------------------------------- - */ - -static SubFont * -CanUseFallback( - MacFont *fontPtr, /* The font object that will own the new - * screen font. */ - CONST char *faceName, /* Desired face name for new screen font. */ - int ch) /* The Unicode character that the new - * screen font must be able to display. */ -{ - int i; - SubFont subFont; - short faceNum; - - if (GetFamilyNum(faceName, &faceNum) == 0) { - return NULL; - } - - /* - * Skip all fonts we've already used. - */ - - for (i = 0; i < fontPtr->numSubFonts; i++) { - if (faceNum == fontPtr->subFontArray[i].familyPtr->faceNum) { - return NULL; - } - } - - /* - * Load this font and see if it has the desired character. - */ - - InitSubFont(fontPtr, faceNum, &subFont); - if (((ch < 256) && (subFont.familyPtr->isSymbolFont)) - || (FontMapLookup(&subFont, ch) == 0)) { - ReleaseSubFont(&subFont); - return NULL; - } - - if (fontPtr->numSubFonts >= SUBFONT_SPACE) { - SubFont *newPtr; - - newPtr = (SubFont *) ckalloc(sizeof(SubFont) - * (fontPtr->numSubFonts + 1)); - memcpy((char *) newPtr, fontPtr->subFontArray, - fontPtr->numSubFonts * sizeof(SubFont)); - if (fontPtr->subFontArray != fontPtr->staticSubFonts) { - ckfree((char *) fontPtr->subFontArray); - } - fontPtr->subFontArray = newPtr; - } - fontPtr->subFontArray[fontPtr->numSubFonts] = subFont; - fontPtr->numSubFonts++; - return &fontPtr->subFontArray[fontPtr->numSubFonts - 1]; -} - -/* - *------------------------------------------------------------------------- - * - * GetFamilyNum -- - * - * Determines if any physical screen font exists on the system with - * the given family name. If the family exists, then it should be - * possible to construct some physical screen font with that family - * name. - * - * Results: - * The return value is 0 if the specified font family does not exist, - * non-zero otherwise. *faceNumPtr is filled with the unique face - * number that identifies the screen font, or 0 if the font family - * did not exist. - * - * Side effects: - * None. - * - *------------------------------------------------------------------------- - */ - -static int -GetFamilyNum( - CONST char *faceName, /* UTF-8 name of font family to query. */ - short *faceNumPtr) /* Filled with font number for above family. */ -{ - FontNameMap *mapPtr; - - if (faceName != NULL) { - for (mapPtr = gFontNameMap; mapPtr->utfName != NULL; mapPtr++) { - if (strcasecmp(faceName, mapPtr->utfName) == 0) { - *faceNumPtr = mapPtr->faceNum; - return 1; - } - } - } - *faceNumPtr = 0; - return 0; -} - -static int -GetFamilyOrAliasNum( - CONST char *faceName, /* UTF-8 name of font family to query. */ - short *faceNumPtr) /* Filled with font number for above family. */ -{ - char **aliases; - int i; - - if (GetFamilyNum(faceName, faceNumPtr) != 0) { - return 1; - } - aliases = TkFontGetAliasList(faceName); - if (aliases != NULL) { - for (i = 0; aliases[i] != NULL; i++) { - if (GetFamilyNum(aliases[i], faceNumPtr) != 0) { - return 1; - } - } - } - return 0; -} - -/* - *------------------------------------------------------------------------- - * - * GetUtfFaceName -- - * - * Given the native name for a Macintosh font (in which the name of - * the font is in the encoding of the font itself), return the UTF-8 - * name that corresponds to that font. The specified font name must - * refer to a font that actually exists on the machine. - * - * This function is used to obtain the UTF-8 name when querying the - * properties of a Macintosh font object. - * - * Results: - * The return value is a pointer to the UTF-8 of the specified font. - * - * Side effects: - * None. - * - *------------------------------------------------------------------------ - */ - -static Tk_Uid -GetUtfFaceName( - StringPtr nativeName) /* Pascal name for font in native encoding. */ -{ - FontNameMap *mapPtr; - - for (mapPtr = gFontNameMap; mapPtr->utfName != NULL; mapPtr++) { - if (pstrcmp(nativeName, mapPtr->nativeName) == 0) { - return mapPtr->utfName; - } - } - panic("GetUtfFaceName: unexpected nativeName"); - return NULL; -} - -/* - *------------------------------------------------------------------------ - * - * GetFontEncoding -- - * - * Return a string that can be passed to Tcl_GetTextEncoding() and - * used to convert bytes from UTF-8 into the encoding of the - * specified font. - * - * The desired encoding to use to convert the name of a symbolic - * font into UTF-8 is macRoman, while the desired encoding to use - * to convert bytes in a symbolic font to UTF-8 is the corresponding - * symbolic encoding. Due to this dual interpretatation of symbolic - * fonts, the caller can specify what type of encoding to return - * should the specified font be symbolic. - * - * Results: - * The return value is a string that specifies the font's encoding. - * If the font's encoding could not be identified, NULL is returned. - * - * Side effects: - * None. - * - *------------------------------------------------------------------------ - */ - -static Tcl_Encoding -GetFontEncoding( - int faceNum, /* Macintosh font number. */ - int allowSymbol, /* If non-zero, then the encoding string - * for symbol fonts will be the corresponding - * symbol encoding. Otherwise, the encoding - * string for symbol fonts will be - * "macRoman". */ - int *isSymbolPtr) /* Filled with non-zero if this font is a - * symbol font, 0 otherwise. */ -{ - Str255 faceName; - int script, lang; - char *name; - - if (allowSymbol != 0) { - GetFontName(faceNum, faceName); - if (pstrcasecmp(faceName, "\psymbol") == 0) { - *isSymbolPtr = 1; - return Tcl_GetEncoding(NULL, "symbol"); - } - if (pstrcasecmp(faceName, "\pzapf dingbats") == 0) { - *isSymbolPtr = 1; - return Tcl_GetEncoding(NULL, "macDingbats"); - } - } - - *isSymbolPtr = 0; - - script = FontToScript(faceNum); - lang = GetScriptVariable(script, smScriptLang); - name = NULL; - if (script == smRoman) { - name = TkFindStateString(romanMap, lang); - } else if (script == smCyrillic) { - name = TkFindStateString(cyrillicMap, lang); - } - if (name == NULL) { - name = TkFindStateString(scriptMap, script); - } - return Tcl_GetEncoding(NULL, name); -} |