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