// EXTERNAL INCLUDES
#include <limits>
#include <dali/public-api/math/vector2.h>
-#include <dali/public-api/text-abstraction/font-client.h>
+#include <dali/devel-api/text-abstraction/font-client.h>
#include <dali/integration-api/debug.h>
// INTERNAL INCLUDES
Impl()
: mLayout( LayoutEngine::SINGLE_LINE_BOX ),
mHorizontalAlignment( LayoutEngine::HORIZONTAL_ALIGN_BEGIN ),
- mVerticalAlignment( LayoutEngine::VERTICAL_ALIGN_TOP )
+ mVerticalAlignment( LayoutEngine::VERTICAL_ALIGN_TOP ),
+ mEllipsisEnabled( false )
{
mFontClient = TextAbstraction::FontClient::Get();
}
/**
* Retrieves the line layout for a given box width.
+ *
+ * @param[in] parameters The layout parameters.
+ * @param[out] lineLayout The line layout.
+ * @param[in] completelyFill Whether to completely fill the line ( even if the last word exceeds the boundaries ).
*/
void GetLineLayoutForBox( const LayoutParameters& parameters,
- LineLayout& lineLayout )
+ LineLayout& lineLayout,
+ bool completelyFill )
{
DALI_LOG_INFO( gLogFilter, Debug::Verbose, "-->GetLineLayoutForBox\n" );
DALI_LOG_INFO( gLogFilter, Debug::Verbose, " initial glyph index : %d\n", lineLayout.glyphIndex );
}
// Check if the accumulated length fits in the width of the box.
- if( isMultiline && !isWhiteSpace &&
+ if( ( completelyFill || isMultiline ) && !isWhiteSpace &&
( lineLayout.length + lineLayout.wsLengthEndOfLine + tmpLineLayout.length + tmpLineLayout.widthAdvanceDiff > boundingBoxWidth ) )
{
// Current word does not fit in the box's width.
- if( !oneWordLaidOut )
+ if( !oneWordLaidOut || completelyFill )
{
DALI_LOG_INFO( gLogFilter, Debug::Verbose, " Break the word by character\n" );
// The word's with doesn't fit in the control's with. It needs to be split by character.
- if( tmpLineLayout.numberOfGlyphs > 1u )
+ if( tmpLineLayout.numberOfGlyphs > 0u )
{
tmpLineLayout.numberOfCharacters -= charactersPerGlyph;
--tmpLineLayout.numberOfGlyphs;
DALI_LOG_INFO( gLogFilter, Debug::Verbose, "<--GetLineLayoutForBox\n" );
}
+ void SetGlyphPositions( const GlyphInfo* const glyphsBuffer,
+ Length numberOfGlyphs,
+ float penY,
+ Vector2* glyphPositionsBuffer )
+ {
+ // Traverse the glyphs and set the positions.
+
+ // Check if the x bearing of the first character is negative.
+ // If it has a negative x bearing, it will exceed the boundaries of the actor,
+ // so the penX position needs to be moved to the right.
+ float penX = 0.f;
+
+ const GlyphInfo& glyph = *glyphsBuffer;
+ if( 0.f > glyph.xBearing )
+ {
+ penX = -glyph.xBearing;
+ }
+
+ for( GlyphIndex i = 0u; i < numberOfGlyphs; ++i )
+ {
+ const GlyphInfo& glyph = *( glyphsBuffer + i );
+ Vector2& position = *( glyphPositionsBuffer + i );
+
+ position.x = penX + glyph.xBearing;
+ position.y = penY - glyph.yBearing;
+
+ penX += glyph.advance;
+ }
+ }
+
bool LayoutText( const LayoutParameters& layoutParameters,
Vector<Vector2>& glyphPositions,
Vector<LineRun>& lines,
Size& actualSize )
{
DALI_LOG_INFO( gLogFilter, Debug::Verbose, "-->LayoutText\n" );
- Vector2* glyphPositionsBuffer = glyphPositions.Begin();
+ DALI_LOG_INFO( gLogFilter, Debug::Verbose, " box size %f, %f\n", layoutParameters.boundingBox.width, layoutParameters.boundingBox.height );
float penY = 0.f;
for( GlyphIndex index = 0u; index < layoutParameters.totalNumberOfGlyphs; )
LineLayout layout;
layout.glyphIndex = index;
GetLineLayoutForBox( layoutParameters,
- layout );
+ layout,
+ false );
DALI_LOG_INFO( gLogFilter, Debug::Verbose, " glyph index %d\n", layout.glyphIndex );
DALI_LOG_INFO( gLogFilter, Debug::Verbose, " character index %d\n", layout.characterIndex );
return false;
}
- LineRun lineRun;
- lineRun.glyphIndex = index;
- lineRun.numberOfGlyphs = layout.numberOfGlyphs;
- lineRun.characterRun.characterIndex = layout.characterIndex;
- lineRun.characterRun.numberOfCharacters = layout.numberOfCharacters;
- lineRun.width = layout.length + layout.widthAdvanceDiff;
- lineRun.ascender = layout.ascender;
- lineRun.descender = layout.descender;
- lineRun.extraLength = layout.wsLengthEndOfLine > 0.f ? layout.wsLengthEndOfLine - layout.widthAdvanceDiff : 0.f;
- lineRun.direction = false;
-
- lines.PushBack( lineRun );
-
- // Update the actual size.
- if( lineRun.width > actualSize.width )
+ // Set the line position. Discard if ellipsis is enabled and the position exceeds the boundaries
+ // of the box.
+ penY += layout.ascender;
+
+ DALI_LOG_INFO( gLogFilter, Debug::Verbose, " pen y %f\n", penY );
+ if( mEllipsisEnabled &&
+ ( ( penY - layout.descender > layoutParameters.boundingBox.height ) ||
+ ( ( mLayout == SINGLE_LINE_BOX ) &&
+ ( layout.length + layout.widthAdvanceDiff > layoutParameters.boundingBox.width ) ) ) )
{
- actualSize.width = lineRun.width;
- }
+ // Do not layout more lines if ellipsis is enabled.
- actualSize.height += ( lineRun.ascender + -lineRun.descender );
+ // The last line needs to be completely filled with characters.
+ // Part of a word may be used.
- // Traverse the glyphs and set the positions.
+ const Length numberOfLines = lines.Count();
- penY += layout.ascender;
+ LineRun lineRun;
+ LineLayout ellipsisLayout;
+ if( 0u != numberOfLines )
+ {
+ // Get the last line and layout it again with the 'completelyFill' flag to true.
+ lineRun = *( lines.Begin() + ( numberOfLines - 1u ) );
- // Check if the x bearing of the first character is negative.
- // If it has a negative x bearing, it will exceed the boundaries of the actor,
- // so the penX position needs to be moved to the right.
- float penX = 0.f;
+ penY -= layout.ascender - lineRun.descender;
- const GlyphInfo& glyph = *( layoutParameters.glyphsBuffer + index );
- if( 0.f > glyph.xBearing )
- {
- penX = -glyph.xBearing;
- }
+ ellipsisLayout.glyphIndex = lineRun.glyphIndex;
+ }
+ else
+ {
+ lineRun.glyphIndex = 0u;
+ ellipsisLayout.glyphIndex = 0u;
+ }
- for( GlyphIndex i = index; i < index + layout.numberOfGlyphs; ++i )
- {
- const GlyphInfo& glyph = *( layoutParameters.glyphsBuffer + i );
- Vector2& position = *( glyphPositionsBuffer + i );
+ GetLineLayoutForBox( layoutParameters,
+ ellipsisLayout,
+ true );
+
+ lineRun.numberOfGlyphs = ellipsisLayout.numberOfGlyphs;
+ lineRun.characterRun.characterIndex = ellipsisLayout.characterIndex;
+ lineRun.characterRun.numberOfCharacters = ellipsisLayout.numberOfCharacters;
+ lineRun.width = layoutParameters.boundingBox.width;
+ lineRun.ascender = ellipsisLayout.ascender;
+ lineRun.descender = ellipsisLayout.descender;
+ lineRun.extraLength = ellipsisLayout.wsLengthEndOfLine > 0.f ? ellipsisLayout.wsLengthEndOfLine - ellipsisLayout.widthAdvanceDiff : 0.f;
+ lineRun.ellipsis = true;
- position.x = penX + glyph.xBearing;
- position.y = penY - glyph.yBearing;
+ actualSize.width = layoutParameters.boundingBox.width;
+ actualSize.height += ( lineRun.ascender + -lineRun.descender );
- penX += glyph.advance;
+ SetGlyphPositions( layoutParameters.glyphsBuffer + lineRun.glyphIndex,
+ ellipsisLayout.numberOfGlyphs,
+ penY,
+ glyphPositions.Begin() + lineRun.glyphIndex );
+
+ if( 0u != numberOfLines )
+ {
+ // Set the last line with the ellipsis layout.
+ *( lines.Begin() + ( numberOfLines - 1u ) ) = lineRun;
+ }
+ else
+ {
+ // Push the line.
+ lines.PushBack( lineRun );
+ }
+
+ break;
}
+ else
+ {
+ LineRun lineRun;
+ lineRun.glyphIndex = index;
+ lineRun.numberOfGlyphs = layout.numberOfGlyphs;
+ lineRun.characterRun.characterIndex = layout.characterIndex;
+ lineRun.characterRun.numberOfCharacters = layout.numberOfCharacters;
+ lineRun.width = layout.length + layout.widthAdvanceDiff;
+ lineRun.ascender = layout.ascender;
+ lineRun.descender = layout.descender;
+ lineRun.extraLength = layout.wsLengthEndOfLine > 0.f ? layout.wsLengthEndOfLine - layout.widthAdvanceDiff : 0.f;
+ lineRun.direction = false;
+ lineRun.ellipsis = false;
+
+ lines.PushBack( lineRun );
+
+ // Update the actual size.
+ if( lineRun.width > actualSize.width )
+ {
+ actualSize.width = lineRun.width;
+ }
+
+ actualSize.height += ( lineRun.ascender + -lineRun.descender );
- penY += -layout.descender;
+ SetGlyphPositions( layoutParameters.glyphsBuffer + index,
+ layout.numberOfGlyphs,
+ penY,
+ glyphPositions.Begin() + index );
- // Increase the glyph index.
- index += layout.numberOfGlyphs;
+ penY += -layout.descender;
+
+ // Increase the glyph index.
+ index += layout.numberOfGlyphs;
+ }
}
DALI_LOG_INFO( gLogFilter, Debug::Verbose, "<--LayoutText\n\n" );
+
return true;
}
}
}
- void Align( const LayoutParameters& layoutParameters,
- const Size& layoutSize,
- const Vector<LineRun>& lines,
- Vector<Vector2>& glyphPositions )
+ void Align( const Size& layoutSize,
+ Vector<LineRun>& lines )
{
- Vector2* glyphPositionsBuffer = glyphPositions.Begin();
-
// Traverse all lines and align the glyphs.
- // LayoutParameters contains bidirectional info for those lines with
- // right to left text, this info includes the paragraph's direction.
- LineIndex bidiLineIndex = 0u;
- for( Vector<LineRun>::ConstIterator it = lines.Begin(), endIt = lines.End();
+ for( Vector<LineRun>::Iterator it = lines.Begin(), endIt = lines.End();
it != endIt;
++it )
{
- const LineRun& line = *it;
-
- // 1) Get the paragrap's direction.
- bool paragraphDirection = false;
-
- // Check if there is any right to left line.
- if( ( NULL != layoutParameters.lineBidirectionalInfoRunsBuffer ) &&
- ( bidiLineIndex < layoutParameters.numberOfBidirectionalInfoRuns ) )
- {
- const BidirectionalLineInfoRun* bidiLine = layoutParameters.lineBidirectionalInfoRunsBuffer + bidiLineIndex;
-
- // Get the right to left line that match with current line.
- while( ( line.characterRun.characterIndex > bidiLine->characterRun.characterIndex ) &&
- ( bidiLineIndex < layoutParameters.numberOfBidirectionalInfoRuns ) )
- {
- ++bidiLineIndex;
- bidiLine = layoutParameters.lineBidirectionalInfoRunsBuffer + bidiLineIndex;
- }
-
- if( line.characterRun.characterIndex == bidiLine->characterRun.characterIndex )
- {
- paragraphDirection = bidiLine->direction;
- }
- }
-
- // 2) Calculate the alignment offset accordingly with the align option,
- // the box width, line length, and the paragraphs direction.
- float alignOffset = CalculateHorizontalAlignment( layoutSize.width,
- line.width,
- line.extraLength,
- paragraphDirection );
-
- // 3) Traverse all glyphs and update the 'x' position.
- for( GlyphIndex index = line.glyphIndex,
- endIndex = line.glyphIndex + line.numberOfGlyphs;
- index < endIndex;
- ++index )
- {
- Vector2& position = *( glyphPositionsBuffer + index );
-
- position.x += alignOffset;
- }
+ LineRun& line = *it;
+ const bool isLastLine = lines.End() == it + 1u;
+
+ // Calculate the alignment offset accordingly with the align option,
+ // the box width, line length, and the paragraphs direction.
+ CalculateHorizontalAlignment( layoutSize.width,
+ line,
+ isLastLine );
}
}
- float CalculateHorizontalAlignment( float boxWidth,
- float lineLength,
- float extraLength,
- bool paragraphDirection )
+ void CalculateHorizontalAlignment( float boxWidth,
+ LineRun& line,
+ bool isLastLine )
{
- float offset = 0.f;
+ line.alignmentOffset = 0.f;
+ const bool isRTL = RTL == line.direction;
+ float lineLength = line.width;
HorizontalAlignment alignment = mHorizontalAlignment;
- if( paragraphDirection &&
+ if( isRTL &&
( HORIZONTAL_ALIGN_CENTER != alignment ) )
{
if( HORIZONTAL_ALIGN_BEGIN == alignment )
{
case HORIZONTAL_ALIGN_BEGIN:
{
- offset = 0.f;
+ line.alignmentOffset = 0.f;
break;
}
case HORIZONTAL_ALIGN_CENTER:
{
- offset = 0.5f * ( boxWidth - lineLength );
- const int intOffset = static_cast<int>( offset ); // try to avoid pixel alignment.
- offset = static_cast<float>( intOffset );
+ line.alignmentOffset = floorf( 0.5f * ( boxWidth - lineLength ) ); // try to avoid pixel alignment.
break;
}
case HORIZONTAL_ALIGN_END:
{
- offset = boxWidth - lineLength;
+ line.alignmentOffset = boxWidth - lineLength;
break;
}
}
- if( paragraphDirection )
+ if( isRTL )
{
- offset -= extraLength;
+ line.alignmentOffset -= line.extraLength;
}
-
- return offset;
}
LayoutEngine::Layout mLayout;
LayoutEngine::VerticalAlignment mVerticalAlignment;
TextAbstraction::FontClient mFontClient;
+
+ bool mEllipsisEnabled:1;
};
LayoutEngine::LayoutEngine()
return mImpl->mLayout;
}
+void LayoutEngine::SetTextEllipsisEnabled( bool enabled )
+{
+ mImpl->mEllipsisEnabled = enabled;
+}
+
+bool LayoutEngine::GetTextEllipsisEnabled() const
+{
+ return mImpl->mEllipsisEnabled;
+}
+
void LayoutEngine::SetHorizontalAlignment( HorizontalAlignment alignment )
{
mImpl->mHorizontalAlignment = alignment;
glyphPositions );
}
-void LayoutEngine::Align( const LayoutParameters& layoutParameters,
- const Size& layoutSize,
- const Vector<LineRun>& lines,
- Vector<Vector2>& glyphPositions )
+void LayoutEngine::Align( const Size& layoutSize,
+ Vector<LineRun>& lines )
{
- mImpl->Align( layoutParameters,
- layoutSize,
- lines,
- glyphPositions );
+ mImpl->Align( layoutSize,
+ lines );
}
} // namespace Text
projects / platform / core / uifw / dali-toolkit.git / blobdiff