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-rw-r--r--ChangeLog6
-rw-r--r--macosx/tkMacOSXFont.c123
2 files changed, 81 insertions, 48 deletions
diff --git a/ChangeLog b/ChangeLog
index de5ce11..16456cd 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2004-11-12 Daniel Steffen <das@users.sourceforge.net>
+
+ * macosx/tkMacOSXFont.c (Tk_MeasureChars,Tk_DrawChars,etc): Make
+ sure that the lastSubFontPtr remains valid even when the subfont
+ array is reallocated. [Bug 618872]
+
2004-11-11 Daniel Steffen <das@users.sourceforge.net>
* generic/tkMain.c:
diff --git a/macosx/tkMacOSXFont.c b/macosx/tkMacOSXFont.c
index 875e1a3..ae3a6cc 100644
--- a/macosx/tkMacOSXFont.c
+++ b/macosx/tkMacOSXFont.c
@@ -11,7 +11,7 @@
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
- * RCS: @(#) $Id: tkMacOSXFont.c,v 1.3.2.1 2004/02/16 00:42:34 wolfsuit Exp $
+ * RCS: @(#) $Id: tkMacOSXFont.c,v 1.3.2.2 2004/11/12 09:03:40 das Exp $
*/
#include <Carbon/Carbon.h>
@@ -235,9 +235,9 @@ static GWorldPtr gWorld = NULL;
*/
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 SubFont * CanUseFallback(MacFont *fontPtr, CONST char *fallbackName, int ch, SubFont **fixSubFontPtrPtr);
+static SubFont * CanUseFallbackWithAliases(MacFont *fontPtr, CONST char *faceName, int ch, Tcl_DString *nameTriedPtr, SubFont **fixSubFontPtrPtr);
+static SubFont * FindSubFontForChar(MacFont *fontPtr, int ch, SubFont **fixSubFontPtrPtr);
static void FontMapInsert(SubFont *subFontPtr, int ch);
static void FontMapLoadPage(SubFont *subFontPtr, int row);
static int FontMapLookup(SubFont *subFontPtr, int ch);
@@ -670,7 +670,7 @@ Tk_MeasureChars(
* terminating character. */
{
MacFont *fontPtr;
- FontFamily *lastFamilyPtr;
+ SubFont *thisSubFontPtr, *lastSubFontPtr;
CGrafPtr saveWorld;
GDHandle saveDevice;
int curX, curByte;
@@ -695,7 +695,7 @@ Tk_MeasureChars(
TextSize(fontPtr->size);
TextFace(fontPtr->style);
- lastFamilyPtr = fontPtr->subFontArray[0].familyPtr;
+ lastSubFontPtr = &fontPtr->subFontArray[0];
if (numBytes == 0) {
curX = 0;
@@ -703,7 +703,7 @@ Tk_MeasureChars(
} else if (maxLength < 0) {
CONST char *p, *end, *next;
Tcl_UniChar ch;
- FontFamily *thisFamilyPtr;
+ FontFamily *familyPtr;
Tcl_DString runString;
/*
@@ -718,21 +718,23 @@ Tk_MeasureChars(
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,
+ thisSubFontPtr = FindSubFontForChar(fontPtr, ch, &lastSubFontPtr);
+ if (thisSubFontPtr != lastSubFontPtr) {
+ familyPtr = lastSubFontPtr->familyPtr;
+ TextFont(familyPtr->faceNum);
+ Tcl_UtfToExternalDString(familyPtr->encoding, source,
p - source, &runString);
curX += TextWidth(Tcl_DStringValue(&runString), 0,
Tcl_DStringLength(&runString));
Tcl_DStringFree(&runString);
- lastFamilyPtr = thisFamilyPtr;
+ lastSubFontPtr = thisSubFontPtr;
source = p;
}
p = next;
}
- TextFont(lastFamilyPtr->faceNum);
- Tcl_UtfToExternalDString(lastFamilyPtr->encoding, source, p - source,
+ familyPtr = lastSubFontPtr->familyPtr;
+ TextFont(familyPtr->faceNum);
+ Tcl_UtfToExternalDString(familyPtr->encoding, source, p - source,
&runString);
curX += TextWidth(Tcl_DStringValue(&runString), 0,
Tcl_DStringLength(&runString));
@@ -741,7 +743,6 @@ Tk_MeasureChars(
} else {
CONST char *p, *end, *next, *sourceOrig;
int widthLeft;
- FontFamily *thisFamilyPtr;
Tcl_UniChar ch;
CONST char *rest = NULL;
@@ -758,24 +759,24 @@ Tk_MeasureChars(
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;
+ thisSubFontPtr = FindSubFontForChar(fontPtr, ch, &lastSubFontPtr);
+ if (thisSubFontPtr != lastSubFontPtr) {
+ if (p > source) {
+ rest = BreakLine(lastSubFontPtr->familyPtr, flags, source,
+ p - source, &widthLeft);
+ flags &= ~TK_AT_LEAST_ONE;
+ if (rest != NULL) {
+ p = source;
+ break;
+ }
+ }
+ lastSubFontPtr = thisSubFontPtr;
source = p;
}
}
if (p > source) {
- rest = BreakLine(lastFamilyPtr, flags, source, p - source,
+ rest = BreakLine(lastSubFontPtr->familyPtr, flags, source, p - source,
&widthLeft);
}
@@ -1079,7 +1080,8 @@ MultiFontDrawText(
int x, int y) /* Coordinates at which to place origin *
* of string when drawing. */
{
- FontFamily *lastFamilyPtr, *thisFamilyPtr = NULL;
+ SubFont *thisSubFontPtr, *lastSubFontPtr;
+ FontFamily *familyPtr;
Tcl_DString runString;
CONST char *p, *end, *next;
Tcl_UniChar ch;
@@ -1087,16 +1089,17 @@ MultiFontDrawText(
TextSize(fontPtr->size);
TextFace(fontPtr->style);
- lastFamilyPtr = fontPtr->subFontArray[0].familyPtr;
+ lastSubFontPtr = &fontPtr->subFontArray[0];
end = source + numBytes;
for (p = source; p < end; ) {
next = p + Tcl_UtfToUniChar(p, &ch);
- thisFamilyPtr = FindSubFontForChar(fontPtr, ch)->familyPtr;
- if (thisFamilyPtr != lastFamilyPtr) {
+ thisSubFontPtr = FindSubFontForChar(fontPtr, ch, &lastSubFontPtr);
+ if (thisSubFontPtr != lastSubFontPtr) {
if (p > source) {
- TextFont(lastFamilyPtr->faceNum);
- Tcl_UtfToExternalDString(lastFamilyPtr->encoding, source,
+ familyPtr = lastSubFontPtr->familyPtr;
+ TextFont(familyPtr->faceNum);
+ Tcl_UtfToExternalDString(familyPtr->encoding, source,
p - source, &runString);
MoveTo((short) x, (short) y);
DrawText(Tcl_DStringValue(&runString), 0,
@@ -1106,13 +1109,14 @@ MultiFontDrawText(
Tcl_DStringFree(&runString);
source = p;
}
- lastFamilyPtr = thisFamilyPtr;
+ lastSubFontPtr = thisSubFontPtr;
}
p = next;
}
if (p > source) {
- TextFont(thisFamilyPtr->faceNum);
- Tcl_UtfToExternalDString(lastFamilyPtr->encoding, source,
+ familyPtr = lastSubFontPtr->familyPtr;
+ TextFont(familyPtr->faceNum);
+ Tcl_UtfToExternalDString(familyPtr->encoding, source,
p - source, &runString);
MoveTo((short) x, (short) y);
DrawText(Tcl_DStringValue(&runString), 0,
@@ -1488,7 +1492,9 @@ FreeFontFamily(
* Side effects:
* The contents of fontPtr are modified to cache the results
* of the lookup and remember any SubFonts that were dynamically
- * loaded.
+ * loaded. The table of SubFonts might be extended, and if a non-NULL
+ * reference to a subfont pointer is available, it is updated if it
+ * previously pointed into the old subfont table.
*
*-------------------------------------------------------------------------
*/
@@ -1497,7 +1503,9 @@ static SubFont *
FindSubFontForChar(
MacFont *fontPtr, /* The font object with which the character
* will be displayed. */
- int ch) /* The Unicode character to be displayed. */
+ int ch, /* The Unicode character to be displayed. */
+ SubFont **fixSubFontPtrPtr) /* Subfont reference to fix up if we
+ * reallocate our subfont table. */
{
int i, j, k;
CONST char *fallbackName;
@@ -1561,7 +1569,7 @@ FindSubFontForChar(
for (j = 0; fontFallbacks[i][j] != NULL; j++) {
fallbackName = fontFallbacks[i][j];
subFontPtr = CanUseFallbackWithAliases(fontPtr, fallbackName,
- ch, &faceNames);
+ ch, &faceNames, fixSubFontPtrPtr);
if (subFontPtr != NULL) {
goto end;
}
@@ -1576,7 +1584,7 @@ FindSubFontForChar(
for (i = 0; anyFallbacks[i] != NULL; i++) {
fallbackName = anyFallbacks[i];
subFontPtr = CanUseFallbackWithAliases(fontPtr, fallbackName, ch,
- &faceNames);
+ &faceNames, fixSubFontPtrPtr);
if (subFontPtr != NULL) {
goto end;
}
@@ -1590,7 +1598,8 @@ FindSubFontForChar(
for (mapPtr = gFontNameMap; mapPtr->utfName != NULL; mapPtr++) {
fallbackName = mapPtr->utfName;
if (SeenName(fallbackName, &faceNames) == 0) {
- subFontPtr = CanUseFallback(fontPtr, fallbackName, ch);
+ subFontPtr = CanUseFallback(fontPtr, fallbackName, ch,
+ fixSubFontPtrPtr);
if (subFontPtr != NULL) {
goto end;
}
@@ -1832,7 +1841,9 @@ FontMapLoadPage(
* 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.
+ * be tried again. The table of SubFonts might be extended, and if
+ * a non-NULL reference to a subfont pointer is available, it is
+ * updated if it previously pointed into the old subfont table.
*
*---------------------------------------------------------------------------
*/
@@ -1844,17 +1855,19 @@ CanUseFallbackWithAliases(
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
+ 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 **fixSubFontPtrPtr) /* Subfont reference to fix up if we
+ * reallocate our subfont table. */
{
SubFont *subFontPtr;
char **aliases;
int i;
if (SeenName(faceName, nameTriedPtr) == 0) {
- subFontPtr = CanUseFallback(fontPtr, faceName, ch);
+ subFontPtr = CanUseFallback(fontPtr, faceName, ch, fixSubFontPtrPtr);
if (subFontPtr != NULL) {
return subFontPtr;
}
@@ -1863,7 +1876,8 @@ CanUseFallbackWithAliases(
if (aliases != NULL) {
for (i = 0; aliases[i] != NULL; i++) {
if (SeenName(aliases[i], nameTriedPtr) == 0) {
- subFontPtr = CanUseFallback(fontPtr, aliases[i], ch);
+ subFontPtr = CanUseFallback(fontPtr, aliases[i], ch,
+ fixSubFontPtrPtr);
if (subFontPtr != NULL) {
return subFontPtr;
}
@@ -1932,7 +1946,10 @@ SeenName(
*
* Side effects:
* The font object's subFontArray is updated to contain a reference
- * to the newly allocated SubFont.
+ * to the newly allocated SubFont. The table of SubFonts might be
+ * extended, and if a non-NULL reference to a subfont pointer is
+ * available, it is updated if it previously pointed into the old
+ * subfont table.
*
*-------------------------------------------------------------------------
*/
@@ -1942,8 +1959,10 @@ 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
+ int ch, /* The Unicode character that the new
* screen font must be able to display. */
+ SubFont **fixSubFontPtrPtr) /* Subfont reference to fix up if we
+ * reallocate our subfont table. */
{
int i;
SubFont subFont;
@@ -1980,6 +1999,14 @@ CanUseFallback(
* (fontPtr->numSubFonts + 1));
memcpy((char *) newPtr, fontPtr->subFontArray,
fontPtr->numSubFonts * sizeof(SubFont));
+ if (fixSubFontPtrPtr != NULL) {
+ /*
+ * Fix up the variable pointed to by fixSubFontPtrPtr so it
+ * still points into the live array. [Bug 618872]
+ */
+ *fixSubFontPtrPtr =
+ newPtr + (*fixSubFontPtrPtr - fontPtr->subFontArray);
+ }
if (fontPtr->subFontArray != fontPtr->staticSubFonts) {
ckfree((char *) fontPtr->subFontArray);
}
generated by cgit v0.12 at 2024-11-27 15:53:12 (GMT)