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[coretext] Attempt to fix jumping lines

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No more jumping and spaces between text runs are not eaten, but text
selection is still broken, as well as editing.

Change-Id: Ic9d2a6df0add20b63d6edf0ddf84b7d6f8de0983
This commit is contained in:
Khaled Hosny
2013-05-11 21:04:45 +02:00
parent b9d460f18b
commit c049df6fdd
1 changed files with 31 additions and 33 deletions
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64
vcl/coretext/salcoretextlayout.cxx
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@@ -308,34 +308,37 @@ void CoreTextLayout::DropGlyph( int /*nStart*/ )
long CoreTextLayout::FillDXArray( sal_Int32* pDXArray ) const
{
// Short circuit requests which don't need full details
if( !pDXArray ) {
return GetTextWidth();
if (pDXArray)
{
for (int i = 0; i < mnCharCount; i++)
pDXArray[i] = 0;
CFArrayRef runs = CTLineGetGlyphRuns(mpLine);
const CFIndex nRuns = CFArrayGetCount(runs);
for (CFIndex runIndex = 0; runIndex < nRuns; runIndex++)
{
CTRunRef run = (CTRunRef)CFArrayGetValueAtIndex(runs, runIndex);
if (!run)
continue;
const CFIndex runGlyphCount = CTRunGetGlyphCount(run);
if (runGlyphCount)
{
CFIndex runStringIndices[runGlyphCount];
CGSize runGlyphAdvances[runGlyphCount];
CTRunGetStringIndices(run, CFRangeMake(0, 0), runStringIndices);
CTRunGetAdvances(run, CFRangeMake(0, 0), runGlyphAdvances);
for (int i = 0; i < runGlyphCount; i++)
{
const CFIndex charIndex = runStringIndices[i];
pDXArray[charIndex] += runGlyphAdvances[i].width;
}
}
}
}
// Distribute the widths among the string elements
long width = 0;
float scale = mpStyle->GetFontStretchFactor();
CGFloat accumulatedWidth = 0;
std::ostringstream DXArrayInfo;
for( int i = 0; i < mnCharCount; ++i ) {
// Convert and adjust for accumulated rounding errors
accumulatedWidth += mpCharWidths[ i ];
const long old_width = width;
width = round_to_long( accumulatedWidth * scale );
pDXArray[i] = width - old_width;
#ifdef SAL_LOG_INFO
if ( i < 7 )
DXArrayInfo << " " << pDXArray[i];
else if ( i == 7 )
DXArrayInfo << "...";
#endif
}
SAL_INFO( "vcl.coretext.layout", "FillDXArray(" << this << "):" << DXArrayInfo.str() << ", result=" << width );
return width;
return GetTextWidth();
}
bool CoreTextLayout::GetBoundRect( SalGraphics& rGraphics, Rectangle& rVCLRect ) const
@@ -508,13 +511,8 @@ int CoreTextLayout::GetTextBreak( long nMaxWidth, long nCharExtra, int nFactor )
long CoreTextLayout::GetTextWidth() const
{
CGContextRef context = mpGraphics->GetContext();
if (!context) {
SAL_INFO( "vcl.coretext.layout", "GetTextWidth(): no context!?");
return 0;
}
CGRect bound_rect = CTLineGetImageBounds(mpLine, context);
long w = round_to_long((bound_rect.size.width + CTLineGetTrailingWhitespaceWidth(mpLine)) * mpStyle->GetFontStretchFactor());
double width = CTLineGetTypographicBounds(mpLine, NULL, NULL, NULL);
long w = round_to_long(width + CTLineGetTrailingWhitespaceWidth(mpLine));
SAL_INFO( "vcl.coretext.layout", "GetTextWidth(" << this << ") returning " << w );