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diff -pruN -x '.moz*' -x .deps -x 'thunderbird*' -x '*.mk' -x 'config*' -x dist -x build -x toolkit -x '*o' -x '*a' -x '*html' -x 'firefox*' mozilla.orig/layout/generic/nsTextFrame.cpp mozilla/layout/generic/nsTextFrame.cpp
--- mozilla.orig/layout/generic/nsTextFrame.cpp 2006-12-20 12:15:38.000000000 +0900
+++ mozilla/layout/generic/nsTextFrame.cpp 2006-12-20 21:29:39.000000000 +0900
@@ -2973,15 +2973,16 @@ nsTextFrame::RenderString(nsIRenderingCo
nsIFontMetrics* lastFont = aTextStyle.mLastFont;
PRInt32 pendingCount;
- PRUnichar* runStart = bp;
+ PRUnichar* runStart = bp, *top = aBuffer;
nscoord charWidth, width = 0;
PRInt32 countSoFar = 0;
+ PRUint32 offset;
// Save the color we want to use for the text, since calls to
// PaintTextDecorations in this method will call SetColor() on the rendering
// context.
nscolor textColor;
aRenderingContext.GetColor(textColor);
- for (; --aLength >= 0; aBuffer++) {
+ for (offset = 0; offset < aLength; aBuffer++, offset++) {
nsIFontMetrics* nextFont;
nscoord glyphWidth = 0;
PRUnichar ch = *aBuffer;
@@ -3038,7 +3039,7 @@ nsTextFrame::RenderString(nsIRenderingCo
else if (ch == ' ') {
glyphWidth += aTextStyle.mSpaceWidth + aTextStyle.mWordSpacing + aTextStyle.mLetterSpacing;
}
- else if (IS_HIGH_SURROGATE(ch) && aLength > 0 &&
+ else if (IS_HIGH_SURROGATE(ch) && (offset + 1) < aLength &&
IS_LOW_SURROGATE(*(aBuffer+1))) {
// special handling for surrogate pair
@@ -3046,7 +3047,7 @@ nsTextFrame::RenderString(nsIRenderingCo
glyphWidth += charWidth + aTextStyle.mLetterSpacing;
// copy the surrogate low
*bp++ = ch;
- --aLength;
+ offset++;
aBuffer++;
ch = *aBuffer;
// put the width into the space buffer
@@ -3058,10 +3059,10 @@ nsTextFrame::RenderString(nsIRenderingCo
glyphWidth = 0;
}
else {
- aRenderingContext.GetWidth(ch, charWidth);
+ aRenderingContext.GetRangeWidth(top, aLength, offset, offset + 1, (PRUint32&)charWidth);
glyphWidth += charWidth + aTextStyle.mLetterSpacing;
}
- if (justifying && (!isEndOfLine || aLength > 0)
+ if (justifying && (!isEndOfLine || (offset + 1) < aLength)
&& IsJustifiableCharacter(ch, isCJ)) {
glyphWidth += aTextStyle.mExtraSpacePerJustifiableCharacter;
if ((PRUint32)--aTextStyle.mNumJustifiableCharacterToRender
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