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tdf#55361 adjust leftmost position for RTL text while animation.

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Set the leftmost position correctly based on logical advancement
values of XTextLayout to render the substring of a RTL text.

Change-Id: Ib65b433105274f6ebfd251e92d831f1b28516294
Reviewed-on: https://gerrit.libreoffice.org/61459
Tested-by: Jenkins
Reviewed-by: Mark Hung <marklh9@gmail.com>
This commit is contained in:
Mark Hung
2018-10-09 01:28:19 +02:00
parent 7645bd0adf
commit 800c60524d
1 changed files with 30 additions and 9 deletions
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cppcanvas/source/mtfrenderer/textaction.cxx
+30 -9
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@@ -229,6 +229,7 @@ namespace cppcanvas
*/
void initArrayAction( rendering::RenderState& o_rRenderState,
uno::Reference< rendering::XTextLayout >& o_rTextLayout,
double& nLayoutWidth,
const ::basegfx::B2DPoint& rStartPoint,
const OUString& rText,
sal_Int32 nStartPos,
@@ -260,6 +261,9 @@ namespace cppcanvas
"::cppcanvas::internal::initArrayAction(): Invalid font" );
o_rTextLayout->applyLogicalAdvancements( rOffsets );
const double* pOffsets(rOffsets.getConstArray());
nLayoutWidth = *std::max_element(pOffsets, pOffsets + rOffsets.getLength());
}
double getLineWidth( ::VirtualDevice const & rVDev,
@@ -280,6 +284,7 @@ namespace cppcanvas
double& o_rMinPos,
double& o_rMaxPos,
const uno::Reference< rendering::XTextLayout >& rOrigTextLayout,
double nLayoutWidth,
const ::cppcanvas::internal::Action::Subset& rSubset )
{
ENSURE_OR_THROW( rSubset.mnSubsetEnd > rSubset.mnSubsetBegin,
@@ -291,12 +296,6 @@ namespace cppcanvas
ENSURE_OR_THROW( aOrigOffsets.getLength() >= rSubset.mnSubsetEnd,
"::cppcanvas::internal::calcSubsetOffsets(): invalid subset range range" );
// TODO(F3): It currently seems that for RTL text, the
// DX offsets are nevertheless increasing in logical
// text order (I'd expect they are decreasing,
// mimicking the fact that the text is output
// right-to-left). This breaks text effects for ALL
// RTL languages.
// determine leftmost position in given subset range -
// as the DX array contains the output positions
@@ -317,6 +316,16 @@ namespace cppcanvas
0 : rSubset.mnSubsetBegin-1),
pOffsets + rSubset.mnSubsetEnd )) );
// Logical advancements always increase in logical text order.
// For RTL text, nMaxPos is the distance from the right edge to
// the leftmost position in the subset, so we have to convert
// it to the offset from the origin (i.e. left edge ).
// LTR: |---- min --->|---- max --->| |
// RTL: | |<--- max ----|<--- min ---|
// |<- nOffset ->| |
const double nOffset = rOrigTextLayout->getMainTextDirection()
? nLayoutWidth - nMaxPos : nMinPos;
// adapt render state, to move text output to given offset
@@ -326,18 +335,18 @@ namespace cppcanvas
// with the output offset. Neglected for now, as it
// does not matter for drawing layer output
if( rSubset.mnSubsetBegin > 0 )
if (nOffset > 0.0)
{
::basegfx::B2DHomMatrix aTranslation;
if( rOrigTextLayout->getFont()->getFontRequest().FontDescription.IsVertical == css::util::TriState_YES )
{
// vertical text -> offset in y direction
aTranslation.translate( 0.0, nMinPos );
aTranslation.translate(0.0, nOffset);
}
else
{
// horizontal text -> offset in x direction
aTranslation.translate( nMinPos, 0.0 );
aTranslation.translate(nOffset, 0.0);
}
::canvas::tools::appendToRenderState( io_rRenderState,
@@ -415,6 +424,7 @@ namespace cppcanvas
Subset to prepare
*/
void createSubsetLayout( uno::Reference< rendering::XTextLayout >& io_rTextLayout,
double nLayoutWidth,
rendering::RenderState& io_rRenderState,
double& o_rMinPos,
double& o_rMaxPos,
@@ -453,6 +463,7 @@ namespace cppcanvas
o_rMinPos,
o_rMaxPos,
io_rTextLayout,
nLayoutWidth,
rSubset ) );
}
@@ -1069,6 +1080,7 @@ namespace cppcanvas
uno::Reference< rendering::XTextLayout > mxTextLayout;
const CanvasSharedPtr mpCanvas;
rendering::RenderState maState;
double mnLayoutWidth;
};
TextArrayAction::TextArrayAction( const ::basegfx::B2DPoint& rStartPoint,
@@ -1084,6 +1096,7 @@ namespace cppcanvas
{
initArrayAction( maState,
mxTextLayout,
mnLayoutWidth,
rStartPoint,
rString,
nStartPos,
@@ -1107,6 +1120,7 @@ namespace cppcanvas
{
initArrayAction( maState,
mxTextLayout,
mnLayoutWidth,
rStartPoint,
rString,
nStartPos,
@@ -1143,6 +1157,7 @@ namespace cppcanvas
double nDummy0, nDummy1;
createSubsetLayout( xTextLayout,
mnLayoutWidth,
aLocalState,
nDummy0,
nDummy1,
@@ -1181,6 +1196,7 @@ namespace cppcanvas
double nDummy0, nDummy1;
createSubsetLayout( xTextLayout,
mnLayoutWidth,
aLocalState,
nDummy0,
nDummy1,
@@ -1274,6 +1290,7 @@ namespace cppcanvas
const ::basegfx::B2DSize maShadowOffset;
const ::Color maShadowColor;
const ::Color maTextFillColor;
double mnLayoutWidth;
};
EffectTextArrayAction::EffectTextArrayAction( const ::basegfx::B2DPoint& rStartPoint,
@@ -1309,6 +1326,7 @@ namespace cppcanvas
initArrayAction( maState,
mxTextLayout,
mnLayoutWidth,
rStartPoint,
rText,
nStartPos,
@@ -1352,6 +1370,7 @@ namespace cppcanvas
initArrayAction( maState,
mxTextLayout,
mnLayoutWidth,
rStartPoint,
rText,
nStartPos,
@@ -1484,6 +1503,7 @@ namespace cppcanvas
double nMaxPos(aTextBounds.X2 - aTextBounds.X1);
createSubsetLayout( xTextLayout,
mnLayoutWidth,
aLocalState,
nMinPos,
nMaxPos,
@@ -1555,6 +1575,7 @@ namespace cppcanvas
double nMaxPos(aTextBounds.X2 - aTextBounds.X1);
createSubsetLayout( xTextLayout,
mnLayoutWidth,
aLocalState,
nMinPos,
nMaxPos,