/*
- * Copyright (c) 2015 Samsung Electronics Co., Ltd.
+ * Copyright (c) 2017 Samsung Electronics Co., Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
#include <dali/devel-api/text-abstraction/font-client.h>
// INTERNAL INCLUDES
-#include <dali-toolkit/internal/text/layouts/layout-parameters.h>
#include <dali-toolkit/internal/text/bidirectional-line-info-run.h>
+#include <dali-toolkit/internal/text/cursor-helper-functions.h>
+#include <dali-toolkit/internal/text/glyph-metrics-helper.h>
+#include <dali-toolkit/internal/text/layouts/layout-parameters.h>
namespace Dali
{
namespace Text
{
+namespace Layout
+{
+
namespace
{
const float MAX_FLOAT = std::numeric_limits<float>::max();
const bool RTL = true;
const float CURSOR_WIDTH = 1.f;
+const float LINE_SPACING= 0.f;
} //namespace
extraWidth( 0.f ),
wsLengthEndOfLine( 0.f ),
ascender( 0.f ),
- descender( MAX_FLOAT )
+ descender( MAX_FLOAT ),
+ lineSpacing( 0.f )
{}
~LineLayout()
float wsLengthEndOfLine; ///< The length of the white spaces at the end of the line.
float ascender; ///< The maximum ascender of all fonts in the line.
float descender; ///< The minimum descender of all fonts in the line.
+ float lineSpacing; ///< The line spacing
};
-struct LayoutEngine::Impl
+struct Engine::Impl
{
Impl()
- : mLayout( LayoutEngine::SINGLE_LINE_BOX ),
- mHorizontalAlignment( LayoutEngine::HORIZONTAL_ALIGN_BEGIN ),
- mVerticalAlignment( LayoutEngine::VERTICAL_ALIGN_TOP ),
+ : mLayout( Layout::Engine::SINGLE_LINE_BOX ),
mCursorWidth( CURSOR_WIDTH ),
- mEllipsisEnabled( false )
+ mDefaultLineSpacing( LINE_SPACING ),
+ mPreviousCharacterExtraWidth( 0.0f )
{
}
{
lineLayout.descender = fontMetrics.descender;
}
+
+ // set the line spacing
+ lineLayout.lineSpacing = mDefaultLineSpacing;
}
/**
* @param[in,out] paragraphDirection in: the current paragraph's direction, out: the next paragraph's direction. Is set after a must break.
* @param[in] completelyFill Whether to completely fill the line ( even if the last word exceeds the boundaries ).
*/
- void GetLineLayoutForBox( const LayoutParameters& parameters,
+ void GetLineLayoutForBox( const Parameters& parameters,
LineLayout& lineLayout,
CharacterDirection& paragraphDirection,
bool completelyFill )
LineLayout tmpLineLayout;
const bool isMultiline = mLayout == MULTI_LINE_BOX;
- const GlyphIndex lastGlyphIndex = parameters.totalNumberOfGlyphs - 1u;
+ const bool isWordLaidOut = parameters.lineWrapMode == Text::LineWrap::WORD;
+
+ // The last glyph to be laid-out.
+ const GlyphIndex lastGlyphOfParagraphPlusOne = parameters.startGlyphIndex + parameters.numberOfGlyphs;
// If the first glyph has a negative bearing its absolute value needs to be added to the line length.
// In the case the line starts with a right to left character, if the width is longer than the advance,
// the difference needs to be added to the line length.
- const GlyphInfo& glyphInfo = *( parameters.glyphsBuffer + lineLayout.glyphIndex );
+
+ // Check whether the first glyph comes from a character that is shaped in multiple glyphs.
+ const Length numberOfGLyphsInGroup = GetNumberOfGlyphsOfGroup( lineLayout.glyphIndex,
+ lastGlyphOfParagraphPlusOne,
+ parameters.charactersPerGlyphBuffer );
+
+ GlyphMetrics glyphMetrics;
+ GetGlyphsMetrics( lineLayout.glyphIndex,
+ numberOfGLyphsInGroup,
+ glyphMetrics,
+ parameters.glyphsBuffer,
+ mMetrics );
// Set the direction of the first character of the line.
lineLayout.characterIndex = *( parameters.glyphsToCharactersBuffer + lineLayout.glyphIndex );
const CharacterDirection firstCharacterDirection = ( NULL == parameters.characterDirectionBuffer ) ? false : *( parameters.characterDirectionBuffer + lineLayout.characterIndex );
CharacterDirection previousCharacterDirection = firstCharacterDirection;
- const float extraWidth = glyphInfo.xBearing + glyphInfo.width - glyphInfo.advance;
+ const float extraWidth = glyphMetrics.xBearing + glyphMetrics.width - glyphMetrics.advance;
float tmpExtraWidth = ( 0.f < extraWidth ) ? extraWidth : 0.f;
- float tmpExtraBearing = ( 0.f > glyphInfo.xBearing ) ? -glyphInfo.xBearing : 0.f;
+ float tmpExtraBearing = ( 0.f > glyphMetrics.xBearing ) ? -glyphMetrics.xBearing : 0.f;
tmpLineLayout.length += mCursorWidth; // Added to give some space to the cursor.
// Calculate the line height if there is no characters.
- FontId lastFontId = glyphInfo.fontId;
+ FontId lastFontId = glyphMetrics.fontId;
UpdateLineHeight( lastFontId, tmpLineLayout );
bool oneWordLaidOut = false;
- const GlyphIndex lastGlyphPlusOne = parameters.startGlyphIndex + parameters.numberOfGlyphs;
for( GlyphIndex glyphIndex = lineLayout.glyphIndex;
- glyphIndex < lastGlyphPlusOne;
- ++glyphIndex )
+ glyphIndex < lastGlyphOfParagraphPlusOne; )
{
DALI_LOG_INFO( gLogFilter, Debug::Verbose, " glyph index : %d\n", glyphIndex );
- const bool isLastGlyph = glyphIndex == lastGlyphIndex;
- // Get the glyph info.
- const GlyphInfo& glyphInfo = *( parameters.glyphsBuffer + glyphIndex );
+ // Check whether this glyph comes from a character that is shaped in multiple glyphs.
+ const Length numberOfGLyphsInGroup = GetNumberOfGlyphsOfGroup( glyphIndex,
+ lastGlyphOfParagraphPlusOne,
+ parameters.charactersPerGlyphBuffer );
+
+ GlyphMetrics glyphMetrics;
+ GetGlyphsMetrics( glyphIndex,
+ numberOfGLyphsInGroup,
+ glyphMetrics,
+ parameters.glyphsBuffer,
+ mMetrics );
+
+ const bool isLastGlyph = glyphIndex + numberOfGLyphsInGroup == parameters.totalNumberOfGlyphs;
// Check if the font of the current glyph is the same of the previous one.
// If it's different the ascender and descender need to be updated.
- if( lastFontId != glyphInfo.fontId )
+ if( lastFontId != glyphMetrics.fontId )
{
- UpdateLineHeight( glyphInfo.fontId, tmpLineLayout );
- lastFontId = glyphInfo.fontId;
+ UpdateLineHeight( glyphMetrics.fontId, tmpLineLayout );
+ lastFontId = glyphMetrics.fontId;
}
// Get the character indices for the current glyph. The last character index is needed
// because there are glyphs formed by more than one character but their break info is
// given only for the last character.
- const Length charactersPerGlyph = *( parameters.charactersPerGlyphBuffer + glyphIndex );
+ const Length charactersPerGlyph = *( parameters.charactersPerGlyphBuffer + glyphIndex + numberOfGLyphsInGroup - 1u );
+ const bool hasCharacters = charactersPerGlyph > 0u;
const CharacterIndex characterFirstIndex = *( parameters.glyphsToCharactersBuffer + glyphIndex );
- const CharacterIndex characterLastIndex = characterFirstIndex + ( ( 1u > charactersPerGlyph ) ? 0u : charactersPerGlyph - 1u );
+ const CharacterIndex characterLastIndex = characterFirstIndex + ( hasCharacters ? charactersPerGlyph - 1u : 0u );
// Get the line break info for the current character.
- const LineBreakInfo lineBreakInfo = *( parameters.lineBreakInfoBuffer + characterLastIndex );
-
- // Get the word break info for the current character.
- const WordBreakInfo wordBreakInfo = *( parameters.wordBreakInfoBuffer + characterLastIndex );
+ const LineBreakInfo lineBreakInfo = hasCharacters ? *( parameters.lineBreakInfoBuffer + characterLastIndex ) : TextAbstraction::LINE_NO_BREAK;
// Increase the number of characters.
tmpLineLayout.numberOfCharacters += charactersPerGlyph;
// Increase the number of glyphs.
- tmpLineLayout.numberOfGlyphs++;
+ tmpLineLayout.numberOfGlyphs += numberOfGLyphsInGroup;
// Check whether is a white space.
const Character character = *( parameters.textBuffer + characterFirstIndex );
if( isWhiteSpace )
{
// Add the length to the length of white spaces at the end of the line.
- tmpLineLayout.wsLengthEndOfLine += glyphInfo.advance; // The advance is used as the width is always zero for the white spaces.
+ tmpLineLayout.wsLengthEndOfLine += glyphMetrics.advance; // The advance is used as the width is always zero for the white spaces.
}
else
{
// Add as well any previous white space length.
- tmpLineLayout.length += tmpLineLayout.wsLengthEndOfLine + glyphInfo.advance;
+ tmpLineLayout.length += tmpLineLayout.wsLengthEndOfLine + glyphMetrics.advance;
// An extra space may be added to the line for the first and last glyph of the line.
// If the bearing of the first glyph is negative, its positive value needs to be added.
// | Rll|
//
- tmpExtraBearing = ( 0.f > glyphInfo.xBearing ) ? -glyphInfo.xBearing : 0.f;
+ tmpExtraBearing = ( 0.f > glyphMetrics.xBearing ) ? -glyphMetrics.xBearing : 0.f;
}
else // LTR
{
// |rrL |
//
- const float extraWidth = glyphInfo.xBearing + glyphInfo.width - glyphInfo.advance;
+ const float extraWidth = glyphMetrics.xBearing + glyphMetrics.width - glyphMetrics.advance;
tmpExtraWidth = ( 0.f < extraWidth ) ? extraWidth : 0.f;
+ tmpExtraWidth = std::max( mPreviousCharacterExtraWidth - glyphMetrics.advance, tmpExtraWidth );
}
}
else
// -->
// |lllR |
- const float extraWidth = glyphInfo.xBearing + glyphInfo.width - glyphInfo.advance;
+ const float extraWidth = glyphMetrics.xBearing + glyphMetrics.width - glyphMetrics.advance;
tmpExtraWidth = ( 0.f < extraWidth ) ? extraWidth : 0.f;
+ tmpExtraWidth = std::max( mPreviousCharacterExtraWidth - glyphMetrics.advance, tmpExtraWidth );
}
else // LTR
{
// <--
// | Lrrrr|
- tmpExtraBearing = ( 0.f > glyphInfo.xBearing ) ? -glyphInfo.xBearing : 0.f;
+ tmpExtraBearing = ( 0.f > glyphMetrics.xBearing ) ? -glyphMetrics.xBearing : 0.f;
}
}
else if( characterDirection == firstCharacterDirection )
// |llllllrr|
// |Rr |
- tmpExtraBearing = ( 0.f > glyphInfo.xBearing ) ? -glyphInfo.xBearing : 0.f;
+ tmpExtraBearing = ( 0.f > glyphMetrics.xBearing ) ? -glyphMetrics.xBearing : 0.f;
}
else // LTR
{
// |llllrrrr|
// | llL|
- const float extraWidth = glyphInfo.xBearing + glyphInfo.width - glyphInfo.advance;
+ const float extraWidth = glyphMetrics.xBearing + glyphMetrics.width - glyphMetrics.advance;
tmpExtraWidth = ( 0.f < extraWidth ) ? extraWidth : 0.f;
+ tmpExtraWidth = std::max( mPreviousCharacterExtraWidth - glyphMetrics.advance, tmpExtraWidth );
}
}
}
tmpLineLayout.wsLengthEndOfLine = 0.f;
}
+ // If calculation is end but wsLengthEndOfLine is exist, it means end of text is space.
+ // Merge remained length.
+ if ( !parameters.ignoreSpaceAfterText && glyphIndex == lastGlyphOfParagraphPlusOne-1 && tmpLineLayout.wsLengthEndOfLine > 0 )
+ {
+ tmpLineLayout.length += tmpLineLayout.wsLengthEndOfLine;
+ tmpLineLayout.wsLengthEndOfLine = 0u;
+ }
+
+ // Save the current extra width to compare with the next one
+ mPreviousCharacterExtraWidth = tmpExtraWidth;
+
// Check if the accumulated length fits in the width of the box.
- if( ( completelyFill || isMultiline ) && !isWhiteSpace &&
+ if( ( completelyFill || isMultiline ) && !(parameters.ignoreSpaceAfterText && isWhiteSpace) &&
( tmpExtraBearing + lineLayout.length + lineLayout.wsLengthEndOfLine + tmpLineLayout.length + tmpExtraWidth > parameters.boundingBox.width ) )
{
// Current word does not fit in the box's width.
if( tmpLineLayout.numberOfGlyphs > 0u )
{
tmpLineLayout.numberOfCharacters -= charactersPerGlyph;
- --tmpLineLayout.numberOfGlyphs;
+ tmpLineLayout.numberOfGlyphs -= numberOfGLyphsInGroup;
tmpLineLayout.length = previousTmpLineLength;
tmpExtraBearing = previousTmpExtraBearing;
tmpExtraWidth = previousTmpExtraWidth;
DALI_LOG_INFO( gLogFilter, Debug::Verbose, " Must break\n" );
DALI_LOG_INFO( gLogFilter, Debug::Verbose, "<--GetLineLayoutForBox\n" );
+
return;
}
if( isMultiline &&
- ( TextAbstraction::WORD_BREAK == wordBreakInfo ) )
+ ( TextAbstraction::LINE_ALLOW_BREAK == lineBreakInfo ) )
{
- oneWordLaidOut = true;
+ oneWordLaidOut = isWordLaidOut;
DALI_LOG_INFO( gLogFilter, Debug::Verbose, " One word laid-out\n" );
// Current glyph is the last one of the current word.
}
previousCharacterDirection = characterDirection;
+ glyphIndex += numberOfGLyphsInGroup;
}
lineLayout.extraBearing = tmpExtraBearing;
DALI_LOG_INFO( gLogFilter, Debug::Verbose, "<--GetLineLayoutForBox\n" );
}
- /**
- * @brief Calculates the vertical offset to add to the new laid-out glyphs.
- *
- * @pre @p lineIndex must be between 0 and the number of lines (both inclusive).
- *
- * @param[in] lines The previously laid-out lines.
- * @param[in] lineIndex Index to the line where the new laid-out lines are inserted.
- *
- * @return The vertical offset of the lines starting from the beginning to the line @p lineIndex.
- */
- float SetParagraphOffset( const Vector<LineRun>& lines,
- LineIndex lineIndex )
- {
- float offset = 0.f;
-
- for( Vector<LineRun>::ConstIterator it = lines.Begin(),
- endIt = lines.Begin() + lineIndex;
- it != endIt;
- ++it )
- {
- const LineRun& line = *it;
-
- offset += line.ascender + -line.descender;
- }
-
- return offset;
- }
-
void SetGlyphPositions( const GlyphInfo* const glyphsBuffer,
Length numberOfGlyphs,
+ float outlineWidth,
Vector2* glyphPositionsBuffer )
{
// Traverse the glyphs and set the positions.
// so the penX position needs to be moved to the right.
const GlyphInfo& glyph = *glyphsBuffer;
- float penX = ( 0.f > glyph.xBearing ) ? -glyph.xBearing : 0.f;
+ float penX = ( 0.f > glyph.xBearing ) ? -glyph.xBearing + outlineWidth : outlineWidth;
+
for( GlyphIndex i = 0u; i < numberOfGlyphs; ++i )
{
* @param[in,out] numberOfLines The number of laid-out lines.
* @param[in] penY The vertical layout position.
* @param[in] currentParagraphDirection The current paragraph's direction.
+ * @param[in,out] isAutoScrollEnabled If the isAutoScrollEnabled is true and the height of the text exceeds the boundaries of the control the text is elided and the isAutoScrollEnabled is set to false to disable the autoscroll
*
* return Whether the line is ellipsized.
*/
- bool EllipsisLine( const LayoutParameters& layoutParameters,
+ bool EllipsisLine( const Parameters& layoutParameters,
const LineLayout& layout,
Size& layoutSize,
LineRun* linesBuffer,
Vector2* glyphPositionsBuffer,
Length& numberOfLines,
float penY,
- CharacterDirection currentParagraphDirection )
+ CharacterDirection currentParagraphDirection,
+ bool& isAutoScrollEnabled )
{
- const bool ellipsis = ( ( penY - layout.descender > layoutParameters.boundingBox.height ) ||
- ( ( mLayout == SINGLE_LINE_BOX ) &&
- ( layout.extraBearing + layout.length + layout.extraWidth > layoutParameters.boundingBox.width ) ) );
+ const bool ellipsis = isAutoScrollEnabled ? ( penY - layout.descender > layoutParameters.boundingBox.height ) :
+ ( ( penY - layout.descender > layoutParameters.boundingBox.height ) ||
+ ( ( mLayout == SINGLE_LINE_BOX ) &&
+ ( layout.extraBearing + layout.length + layout.extraWidth > layoutParameters.boundingBox.width ) ) );
if( ellipsis )
{
+ isAutoScrollEnabled = false;
// Do not layout more lines if ellipsis is enabled.
// The last line needs to be completely filled with characters.
// Get the last line and layout it again with the 'completelyFill' flag to true.
lineRun = linesBuffer + ( numberOfLines - 1u );
- penY -= layout.ascender - lineRun->descender;
+ penY -= layout.ascender - lineRun->descender + lineRun->lineSpacing;
ellipsisLayout.glyphIndex = lineRun->glyphRun.glyphIndex;
}
lineRun->ellipsis = true;
layoutSize.width = layoutParameters.boundingBox.width;
- layoutSize.height += ( lineRun->ascender + -lineRun->descender );
+ if( layoutSize.height < Math::MACHINE_EPSILON_1000 )
+ {
+ layoutSize.height += ( lineRun->ascender + -lineRun->descender ) + lineRun->lineSpacing;
+ }
SetGlyphPositions( layoutParameters.glyphsBuffer + lineRun->glyphRun.glyphIndex,
ellipsisLayout.numberOfGlyphs,
+ layoutParameters.outlineWidth,
glyphPositionsBuffer + lineRun->glyphRun.glyphIndex - layoutParameters.startGlyphIndex );
}
* @param[in,out] numberOfLines The number of laid-out lines.
* @param[in] isLastLine Whether the laid-out line is the last one.
*/
- void UpdateTextLayout( const LayoutParameters& layoutParameters,
+ void UpdateTextLayout( const Parameters& layoutParameters,
const LineLayout& layout,
Size& layoutSize,
LineRun* linesBuffer,
lineRun.glyphRun.numberOfGlyphs = layout.numberOfGlyphs;
lineRun.characterRun.characterIndex = layout.characterIndex;
lineRun.characterRun.numberOfCharacters = layout.numberOfCharacters;
+ lineRun.lineSpacing = mDefaultLineSpacing;
+
if( isLastLine && !layoutParameters.isLastNewParagraph )
{
const float width = layout.extraBearing + layout.length + layout.extraWidth + layout.wsLengthEndOfLine;
layoutSize.width = lineRun.width;
}
- layoutSize.height += ( lineRun.ascender + -lineRun.descender );
+ layoutSize.height += ( lineRun.ascender + -lineRun.descender ) + lineRun.lineSpacing;
}
/**
* @param[in,out] linesBuffer Pointer to the line's buffer.
* @param[in,out] numberOfLines The number of laid-out lines.
*/
- void UpdateTextLayout( const LayoutParameters& layoutParameters,
+ void UpdateTextLayout( const Parameters& layoutParameters,
CharacterIndex characterIndex,
GlyphIndex glyphIndex,
Size& layoutSize,
lineRun.alignmentOffset = 0.f;
lineRun.direction = !RTL;
lineRun.ellipsis = false;
+ lineRun.lineSpacing = mDefaultLineSpacing;
- layoutSize.height += ( lineRun.ascender + -lineRun.descender );
+ layoutSize.height += ( lineRun.ascender + -lineRun.descender ) + lineRun.lineSpacing;
}
/**
layoutSize.width = line.width;
}
- layoutSize.height += ( line.ascender + -line.descender );
+ layoutSize.height += ( line.ascender + -line.descender ) + line.lineSpacing;
}
}
* @param[in] characterOffset The offset to be added to the runs of characters.
* @param[in] glyphOffset The offset to be added to the runs of glyphs.
*/
- void UpdateLineIndexOffsets( const LayoutParameters& layoutParameters,
+ void UpdateLineIndexOffsets( const Parameters& layoutParameters,
Vector<LineRun>& lines,
Length characterOffset,
Length glyphOffset )
}
}
- bool LayoutText( const LayoutParameters& layoutParameters,
+ bool LayoutText( const Parameters& layoutParameters,
Vector<Vector2>& glyphPositions,
Vector<LineRun>& lines,
- Size& layoutSize )
+ Size& layoutSize,
+ bool elideTextEnabled,
+ bool& isAutoScrollEnabled )
{
DALI_LOG_INFO( gLogFilter, Debug::Verbose, "-->LayoutText\n" );
DALI_LOG_INFO( gLogFilter, Debug::Verbose, " box size %f, %f\n", layoutParameters.boundingBox.width, layoutParameters.boundingBox.height );
{
// Need to add a new line with no characters but with height to increase the layoutSize.height
LineRun newLine;
+ Initialize( newLine );
lines.PushBack( newLine );
UpdateTextLayout( layoutParameters,
}
}
+ // Calculates the layout size.
+ UpdateLayoutSize( lines,
+ layoutSize );
+
// Nothing else do if there are no glyphs to layout.
return false;
}
Vector<LineRun> newLines;
// Estimate the number of lines.
- Length linesCapacity = layoutParameters.estimatedNumberOfLines;
+ Length linesCapacity = std::max( 1u, layoutParameters.estimatedNumberOfLines );
Length numberOfLines = 0u;
if( updateCurrentBuffer )
linesBuffer = lines.Begin();
}
- float penY = SetParagraphOffset( lines,
- layoutParameters.startLineIndex );
+ float penY = CalculateLineOffset( lines,
+ layoutParameters.startLineIndex );
for( GlyphIndex index = layoutParameters.startGlyphIndex; index < lastGlyphPlusOne; )
{
DALI_LOG_INFO( gLogFilter, Debug::Verbose, " pen y %f\n", penY );
bool ellipsis = false;
- if( mEllipsisEnabled )
+ if( elideTextEnabled )
{
// Does the ellipsis of the last line.
ellipsis = EllipsisLine( layoutParameters,
glyphPositionsBuffer,
numberOfLines,
penY,
- currentParagraphDirection );
+ currentParagraphDirection,
+ isAutoScrollEnabled );
}
if( ellipsis )
// Sets the positions of the glyphs.
SetGlyphPositions( layoutParameters.glyphsBuffer + index,
layout.numberOfGlyphs,
+ layoutParameters.outlineWidth,
glyphPositionsBuffer + index - layoutParameters.startGlyphIndex );
// Updates the vertical pen's position.
- penY += -layout.descender;
+ penY += -layout.descender + layout.lineSpacing + mDefaultLineSpacing;
// Increase the glyph index.
index = nextIndex;
return true;
}
- void ReLayoutRightToLeftLines( const LayoutParameters& layoutParameters,
+ void ReLayoutRightToLeftLines( const Parameters& layoutParameters,
CharacterIndex startIndex,
Length numberOfCharacters,
Vector<Vector2>& glyphPositions )
const CharacterIndex characterVisualIndex = bidiLine.characterRun.characterIndex + *bidiLine.visualToLogicalMap;
const GlyphInfo& glyph = *( layoutParameters.glyphsBuffer + *( layoutParameters.charactersToGlyphsBuffer + characterVisualIndex ) );
- float penX = ( 0.f > glyph.xBearing ) ? -glyph.xBearing : 0.f;
+ float penX = ( 0.f > glyph.xBearing ) ? -glyph.xBearing - layoutParameters.outlineWidth : -layoutParameters.outlineWidth;
Vector2* glyphPositionsBuffer = glyphPositions.Begin();
void Align( const Size& size,
CharacterIndex startIndex,
Length numberOfCharacters,
- Vector<LineRun>& lines )
+ Text::HorizontalAlignment::Type horizontalAlignment,
+ Vector<LineRun>& lines,
+ float& alignmentOffset,
+ Dali::LayoutDirection::Type layoutDirection,
+ bool matchSystemLanguageDirection )
{
const CharacterIndex lastCharacterPlusOne = startIndex + numberOfCharacters;
+ alignmentOffset = MAX_FLOAT;
// Traverse all lines and align the glyphs.
for( Vector<LineRun>::Iterator it = lines.Begin(), endIt = lines.End();
it != endIt;
// Calculate the line's alignment offset accordingly with the align option,
// the box width, line length, and the paragraph's direction.
CalculateHorizontalAlignment( size.width,
- line );
+ horizontalAlignment,
+ line,
+ layoutDirection,
+ matchSystemLanguageDirection );
+
+ // Updates the alignment offset.
+ alignmentOffset = std::min( alignmentOffset, line.alignmentOffset );
}
}
void CalculateHorizontalAlignment( float boxWidth,
- LineRun& line )
+ HorizontalAlignment::Type horizontalAlignment,
+ LineRun& line,
+ Dali::LayoutDirection::Type layoutDirection,
+ bool matchSystemLanguageDirection )
{
line.alignmentOffset = 0.f;
- const bool isRTL = RTL == line.direction;
+ const bool isLineRTL = RTL == line.direction;
+ // Whether to swap the alignment.
+ // Swap if the line is RTL and is not required to match the direction of the system's language or if it's required to match the direction of the system's language and it's RTL.
+ bool isLayoutRTL = isLineRTL;
float lineLength = line.width;
- HorizontalAlignment alignment = mHorizontalAlignment;
- if( isRTL )
+ // match align for system language direction
+ if( matchSystemLanguageDirection )
{
// Swap the alignment type if the line is right to left.
- switch( alignment )
- {
- case HORIZONTAL_ALIGN_BEGIN:
- {
- alignment = HORIZONTAL_ALIGN_END;
- break;
- }
- case HORIZONTAL_ALIGN_CENTER:
- {
- // Nothing to do.
- break;
- }
- case HORIZONTAL_ALIGN_END:
- {
- alignment = HORIZONTAL_ALIGN_BEGIN;
- break;
- }
- }
+ isLayoutRTL = layoutDirection == LayoutDirection::RIGHT_TO_LEFT;
}
-
// Calculate the horizontal line offset.
- switch( alignment )
+ switch( horizontalAlignment )
{
- case HORIZONTAL_ALIGN_BEGIN:
+ case HorizontalAlignment::BEGIN:
{
- line.alignmentOffset = 0.f;
+ if( isLayoutRTL )
+ {
+ if( isLineRTL )
+ {
+ lineLength += line.extraLength;
+ }
- if( isRTL )
+ line.alignmentOffset = boxWidth - lineLength;
+ }
+ else
{
- // 'Remove' the white spaces at the end of the line (which are at the beginning in visual order)
- line.alignmentOffset -= line.extraLength;
+ line.alignmentOffset = 0.f;
+
+ if( isLineRTL )
+ {
+ // 'Remove' the white spaces at the end of the line (which are at the beginning in visual order)
+ line.alignmentOffset -= line.extraLength;
+ }
}
break;
}
- case HORIZONTAL_ALIGN_CENTER:
+ case HorizontalAlignment::CENTER:
{
line.alignmentOffset = 0.5f * ( boxWidth - lineLength );
- if( isRTL )
+ if( isLineRTL )
{
line.alignmentOffset -= line.extraLength;
}
line.alignmentOffset = floorf( line.alignmentOffset ); // try to avoid pixel alignment.
break;
}
- case HORIZONTAL_ALIGN_END:
+ case HorizontalAlignment::END:
{
- if( isRTL )
+ if( isLayoutRTL )
{
- lineLength += line.extraLength;
+ line.alignmentOffset = 0.f;
+
+ if( isLineRTL )
+ {
+ // 'Remove' the white spaces at the end of the line (which are at the beginning in visual order)
+ line.alignmentOffset -= line.extraLength;
+ }
}
+ else
+ {
+ if( isLineRTL )
+ {
+ lineLength += line.extraLength;
+ }
- line.alignmentOffset = boxWidth - lineLength;
+ line.alignmentOffset = boxWidth - lineLength;
+ }
break;
}
}
}
- LayoutEngine::Layout mLayout;
- LayoutEngine::HorizontalAlignment mHorizontalAlignment;
- LayoutEngine::VerticalAlignment mVerticalAlignment;
+ void Initialize( LineRun& line )
+ {
+ line.glyphRun.glyphIndex = 0u;
+ line.glyphRun.numberOfGlyphs = 0u;
+ line.characterRun.characterIndex = 0u;
+ line.characterRun.numberOfCharacters = 0u;
+ line.width = 0.f;
+ line.ascender = 0.f;
+ line.descender = 0.f;
+ line.extraLength = 0.f;
+ line.alignmentOffset = 0.f;
+ line.direction = !RTL;
+ line.ellipsis = false;
+ line.lineSpacing = mDefaultLineSpacing;
+ }
+
+ Type mLayout;
float mCursorWidth;
+ float mDefaultLineSpacing;
+ float mPreviousCharacterExtraWidth;
IntrusivePtr<Metrics> mMetrics;
-
- bool mEllipsisEnabled:1;
};
-LayoutEngine::LayoutEngine()
+Engine::Engine()
: mImpl( NULL )
{
- mImpl = new LayoutEngine::Impl();
+ mImpl = new Engine::Impl();
}
-LayoutEngine::~LayoutEngine()
+Engine::~Engine()
{
delete mImpl;
}
-void LayoutEngine::SetMetrics( MetricsPtr& metrics )
+void Engine::SetMetrics( MetricsPtr& metrics )
{
mImpl->mMetrics = metrics;
}
-void LayoutEngine::SetLayout( Layout layout )
+void Engine::SetLayout( Type layout )
{
mImpl->mLayout = layout;
}
-LayoutEngine::Layout LayoutEngine::GetLayout() const
+Engine::Type Engine::GetLayout() const
{
+ DALI_LOG_INFO( gLogFilter, Debug::Verbose, "GetLayout[%d]\n", mImpl->mLayout);
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;
-}
-
-LayoutEngine::HorizontalAlignment LayoutEngine::GetHorizontalAlignment() const
-{
- return mImpl->mHorizontalAlignment;
-}
-
-void LayoutEngine::SetVerticalAlignment( VerticalAlignment alignment )
-{
- mImpl->mVerticalAlignment = alignment;
-}
-
-LayoutEngine::VerticalAlignment LayoutEngine::GetVerticalAlignment() const
-{
- return mImpl->mVerticalAlignment;
-}
-
-void LayoutEngine::SetCursorWidth( int width )
+void Engine::SetCursorWidth( int width )
{
mImpl->mCursorWidth = static_cast<float>( width );
}
-int LayoutEngine::GetCursorWidth() const
+int Engine::GetCursorWidth() const
{
return static_cast<int>( mImpl->mCursorWidth );
}
-bool LayoutEngine::LayoutText( const LayoutParameters& layoutParameters,
- Vector<Vector2>& glyphPositions,
- Vector<LineRun>& lines,
- Size& layoutSize )
+bool Engine::LayoutText( const Parameters& layoutParameters,
+ Vector<Vector2>& glyphPositions,
+ Vector<LineRun>& lines,
+ Size& layoutSize,
+ bool elideTextEnabled,
+ bool& isAutoScrollEnabled )
{
return mImpl->LayoutText( layoutParameters,
glyphPositions,
lines,
- layoutSize );
+ layoutSize,
+ elideTextEnabled,
+ isAutoScrollEnabled );
}
-void LayoutEngine::ReLayoutRightToLeftLines( const LayoutParameters& layoutParameters,
- CharacterIndex startIndex,
- Length numberOfCharacters,
- Vector<Vector2>& glyphPositions )
+void Engine::ReLayoutRightToLeftLines( const Parameters& layoutParameters,
+ CharacterIndex startIndex,
+ Length numberOfCharacters,
+ Vector<Vector2>& glyphPositions )
{
mImpl->ReLayoutRightToLeftLines( layoutParameters,
startIndex,
glyphPositions );
}
-void LayoutEngine::Align( const Size& size,
- CharacterIndex startIndex,
- Length numberOfCharacters,
- Vector<LineRun>& lines )
+void Engine::Align( const Size& size,
+ CharacterIndex startIndex,
+ Length numberOfCharacters,
+ Text::HorizontalAlignment::Type horizontalAlignment,
+ Vector<LineRun>& lines,
+ float& alignmentOffset,
+ Dali::LayoutDirection::Type layoutDirection,
+ bool matchSystemLanguageDirection )
{
mImpl->Align( size,
startIndex,
numberOfCharacters,
- lines );
+ horizontalAlignment,
+ lines,
+ alignmentOffset,
+ layoutDirection,
+ matchSystemLanguageDirection );
+}
+
+void Engine::SetDefaultLineSpacing( float lineSpacing )
+{
+ mImpl->mDefaultLineSpacing = lineSpacing;
+}
+
+float Engine::GetDefaultLineSpacing() const
+{
+ return mImpl->mDefaultLineSpacing;
}
+} // namespace Layout
+
} // namespace Text
} // namespace Toolkit
projects / platform / core / uifw / dali-toolkit.git / blobdiff