Author: hdu
Date: Fri Dec 20 16:25:18 2013
New Revision: 1552720
URL: http://svn.apache.org/r1552720
Log:
#i123895# improve text justification for CoreText layouts
Justification of text containing whitespaces is problematic because
- Writer goes crazy with its HalfSpace magic in SwFntObj::DrawText()
- LayoutEngine handles spaces specially (in particular at the text start or end)
The change here improves the important space-at-text-end scenario considerably
by adjusting to Writer's text-end assumptions and by relieving the LayoutEngine
by stripping out trailing spaces before requesting the text justification.
Modified:
openoffice/branches/rejuvenate01/main/vcl/aqua/source/gdi/ctlayout.cxx
Modified: openoffice/branches/rejuvenate01/main/vcl/aqua/source/gdi/ctlayout.cxx
URL:
http://svn.apache.org/viewvc/openoffice/branches/rejuvenate01/main/vcl/aqua/source/gdi/ctlayout.cxx?rev=1552720&r1=1552719&r2=1552720&view=diff
==============================================================================
--- openoffice/branches/rejuvenate01/main/vcl/aqua/source/gdi/ctlayout.cxx
(original)
+++ openoffice/branches/rejuvenate01/main/vcl/aqua/source/gdi/ctlayout.cxx Fri
Dec 20 16:25:18 2013
@@ -152,7 +152,6 @@ void CTLayout::AdjustLayout( ImplLayoutA
const int nTrailingSpaceWidth = rint( mfFontScale *
mfTrailingSpaceWidth );
int nOrigWidth = GetTextWidth();
- nOrigWidth -= nTrailingSpaceWidth;
int nPixelWidth = rArgs.mnLayoutWidth;
if( nPixelWidth )
{
@@ -181,6 +180,29 @@ void CTLayout::AdjustLayout( ImplLayoutA
if( (nOrigWidth >= nPixelWidth-1) && (nOrigWidth <= nPixelWidth+1) )
return;
+ // if the text to be justified has whitespace in it then
+ // - Writer goes crazy with its HalfSpace magic
+ // - LayoutEngine handles spaces specially (in particular at the text
start or end)
+ if( mnTrailingSpaces ) {
+ // adjust for Writer's SwFntObj::DrawText() Halfspace magic at
the text end
+ std::vector<sal_Int32> aOrigDXAry;
+ aOrigDXAry.resize( mnCharCount);
+ FillDXArray( &aOrigDXAry[0] );
+ int nLastCharSpace = rArgs.mpDXArray[
mnCharCount-1-mnTrailingSpaces ]
+ - aOrigDXAry[ mnCharCount-1-mnTrailingSpaces ];
+ nPixelWidth -= nLastCharSpace;
+ if( nPixelWidth < 0 )
+ return;
+ // recreate the CoreText line layout without trailing spaces
+ CFRelease( mpCTLine );
+ CFStringRef aCFText = CFStringCreateWithCharactersNoCopy( NULL,
rArgs.mpStr + mnMinCharPos,
+ mnCharCount - mnTrailingSpaces, kCFAllocatorNull );
+ CFAttributedStringRef pAttrStr = CFAttributedStringCreate(
NULL, aCFText, mpTextStyle->GetStyleDict() );
+ mpCTLine = CTLineCreateWithAttributedString( pAttrStr );
+ CFRelease( aCFText);
+ CFRelease( pAttrStr );
+ }
+
CTLineRef pNewCTLine = rCT.LineCreateJustifiedLine( mpCTLine, 1.0,
nPixelWidth / mfFontScale );
if( !pNewCTLine ) { // CTLineCreateJustifiedLine can and does fail
// handle failure by keeping the unjustified layout
@@ -344,12 +366,10 @@ long CTLayout::GetTextWidth() const
if( (mnCharCount <= 0) || !mpCTLine )
return 0;
- if( mfCachedWidth < 0.0 ) {
- mfCachedWidth = CTLineGetTypographicBounds( mpCTLine, NULL,
NULL, NULL);
- mfTrailingSpaceWidth = CTLineGetTrailingWhitespaceWidth(
mpCTLine);
- }
+ if( mfCachedWidth < 0.0 )
+ mfCachedWidth = CTLineGetTypographicBounds( mpCTLine, NULL,
NULL, NULL );
- const long nScaledWidth = lrint( mfFontScale * (mfCachedWidth +
mfTrailingSpaceWidth));
+ const long nScaledWidth = lrint( mfFontScale * mfCachedWidth );
return nScaledWidth;
}
@@ -361,9 +381,6 @@ long CTLayout::FillDXArray( sal_Int32* p
if( !pDXArray )
return GetTextWidth();
- // check assumptions
- DBG_ASSERT( mfTrailingSpaceWidth==0.0, "CTLayout::FillDXArray() with
fTSW!=0" );
-
long nPixWidth = GetTextWidth();
if( pDXArray ) {
// initialize the result array
