/*
- * Copyright (c) 2015 Samsung Electronics Co., Ltd.
+ * Copyright (c) 2021 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-toolkit/internal/text/shaper.h>
// EXTERNAL INCLUDES
-#include <dali/public-api/text-abstraction/script.h>
-#include <dali/public-api/text-abstraction/shaping.h>
-
-// INTERNAL INCLUDES
-#include <dali-toolkit/internal/text/font-run.h>
-#include <dali-toolkit/internal/text/logical-model-impl.h>
-#include <dali-toolkit/internal/text/script-run.h>
-#include <dali-toolkit/internal/text/visual-model-impl.h>
+#include <dali/devel-api/text-abstraction/shaping.h>
namespace Dali
{
-
namespace Toolkit
{
-
namespace Text
{
-
-CharacterIndex min( CharacterIndex index0,
- CharacterIndex index1 )
+CharacterIndex min(CharacterIndex index0,
+ CharacterIndex index1)
{
- return ( index0 < index1 ) ? index0 : index1;
+ return (index0 < index1) ? index0 : index1;
}
-void ShapeText( const Vector<Character>& text,
- const Vector<LineBreakInfo>& lineBreakInfo,
- const Vector<ScriptRun>& scripts,
- const Vector<FontRun>& fonts,
- Vector<GlyphInfo>& glyphs,
- Vector<CharacterIndex>& glyphToCharacterMap,
- Vector<Length>& charactersPerGlyph )
+void ShapeText(const Vector<Character>& text,
+ const Vector<LineBreakInfo>& lineBreakInfo,
+ const Vector<ScriptRun>& scripts,
+ const Vector<FontRun>& fonts,
+ CharacterIndex startCharacterIndex,
+ GlyphIndex startGlyphIndex,
+ Length numberOfCharacters,
+ Vector<GlyphInfo>& glyphs,
+ Vector<CharacterIndex>& glyphToCharacterMap,
+ Vector<Length>& charactersPerGlyph,
+ Vector<GlyphIndex>& newParagraphGlyphs)
{
- const Length numberOfCharacters = text.Count();
-
- if( 0u == numberOfCharacters )
+ if(0u == numberOfCharacters)
{
// Nothing to do if there are no characters.
return;
}
#ifdef DEBUG_ENABLED
- const Length numberOfFontRuns = fonts.Count();
- const Length numberOfScriptRuns = scripts.Count();
+ const Length numberOfFontRuns = fonts.Count();
+ const Length numberOfScriptRuns = scripts.Count();
+ const Length totalNumberOfCharacters = text.Count();
#endif
- DALI_ASSERT_DEBUG( ( 0u != numberOfFontRuns ) &&
- ( numberOfCharacters == fonts[numberOfFontRuns - 1u].characterRun.characterIndex + fonts[numberOfFontRuns - 1u].characterRun.numberOfCharacters ) &&
- "Toolkit::Text::ShapeText. All characters must have a font set." );
+ DALI_ASSERT_DEBUG((0u != numberOfFontRuns) &&
+ (totalNumberOfCharacters == fonts[numberOfFontRuns - 1u].characterRun.characterIndex + fonts[numberOfFontRuns - 1u].characterRun.numberOfCharacters) &&
+ "Toolkit::Text::ShapeText. All characters must have a font set.");
- DALI_ASSERT_DEBUG( ( 0u != numberOfScriptRuns ) &&
- ( numberOfCharacters == scripts[numberOfScriptRuns - 1u].characterRun.characterIndex + scripts[numberOfScriptRuns - 1u].characterRun.numberOfCharacters ) &&
- "Toolkit::Text::ShapeText. All characters must have a script set." );
+ DALI_ASSERT_DEBUG((0u != numberOfScriptRuns) &&
+ (totalNumberOfCharacters == scripts[numberOfScriptRuns - 1u].characterRun.characterIndex + scripts[numberOfScriptRuns - 1u].characterRun.numberOfCharacters) &&
+ "Toolkit::Text::ShapeText. All characters must have a script set.");
// The text needs to be split in chunks of consecutive characters.
// Each chunk must contain characters with the same font id and script set.
- // A chunk of consecutive characters must not contain a LINE_MUST_BREAK, if there is one a new chunk have to be created.
+ // A chunk of consecutive characters must not contain a LINE_MUST_BREAK, if there is one a new chunk has to be created.
TextAbstraction::Shaping shaping = TextAbstraction::Shaping::Get();
// To shape the text a font and an script is needed.
+
+ // Get the font run containing the startCharacterIndex character.
Vector<FontRun>::ConstIterator fontRunIt = fonts.Begin();
+ for(Vector<FontRun>::ConstIterator endIt = fonts.End(); fontRunIt < endIt; ++fontRunIt)
+ {
+ const FontRun& run = *fontRunIt;
+ if(startCharacterIndex < run.characterRun.characterIndex + run.characterRun.numberOfCharacters)
+ {
+ // Found.
+ break;
+ }
+ }
+
+ // Get the script run containing the startCharacterIndex character.
Vector<ScriptRun>::ConstIterator scriptRunIt = scripts.Begin();
+ for(Vector<ScriptRun>::ConstIterator endIt = scripts.End(); scriptRunIt < endIt; ++scriptRunIt)
+ {
+ const ScriptRun& run = *scriptRunIt;
+ if(startCharacterIndex < run.characterRun.characterIndex + run.characterRun.numberOfCharacters)
+ {
+ // Found.
+ break;
+ }
+ }
// Index to the the next one to be shaped. Is pointing the character after the last one it was shaped.
CharacterIndex previousIndex = 0u;
// There is no way to know the number of glyphs before shaping the text.
// To avoid reallocations it's reserved space for a slightly biger number of glyphs than the number of characters.
- Length numberOfGlyphsReserved = static_cast<Length>( numberOfCharacters * 1.3f );
- glyphs.Resize( numberOfGlyphsReserved );
- glyphToCharacterMap.Resize( numberOfGlyphsReserved );
+ GlyphInfo glyphInfo;
+ glyphInfo.isItalicRequired = false;
+ glyphInfo.isBoldRequired = false;
+
+ const Length currentNumberOfGlyphs = glyphs.Count();
+ const Length numberOfGlyphsReserved = static_cast<Length>(numberOfCharacters * 1.3f);
+ glyphs.Reserve(currentNumberOfGlyphs + numberOfGlyphsReserved);
+ glyphToCharacterMap.Reserve(currentNumberOfGlyphs + numberOfGlyphsReserved);
// The actual number of glyphs.
- Length totalNumberOfGlyphs = 0u;
+ Length totalNumberOfGlyphs = currentNumberOfGlyphs;
+ // The number of new glyphs.
+ Length numberOfNewGlyphs = 0u;
- const Character* textBuffer = text.Begin();
- const LineBreakInfo* lineBreakInfoBuffer = lineBreakInfo.Begin();
- GlyphInfo* glyphsBuffer = glyphs.Begin();
- CharacterIndex* glyphToCharacterMapBuffer = glyphToCharacterMap.Begin();
+ const Character* const textBuffer = text.Begin();
+ const LineBreakInfo* const lineBreakInfoBuffer = lineBreakInfo.Begin();
+ CharacterIndex* glyphToCharacterMapBuffer = glyphToCharacterMap.Begin();
+
+ Length glyphIndex = startGlyphIndex;
// Traverse the characters and shape the text.
- for( previousIndex = 0; previousIndex < numberOfCharacters; )
+ const CharacterIndex lastCharacter = startCharacterIndex + numberOfCharacters;
+ for(previousIndex = startCharacterIndex; previousIndex < lastCharacter;)
{
// Get the font id and the script.
- const FontRun& fontRun = *fontRunIt;
+ const FontRun& fontRun = *fontRunIt;
const ScriptRun& scriptRun = *scriptRunIt;
- currentFontId = fontRun.fontId;
- currentScript = scriptRun.script;
+ currentFontId = fontRun.fontId;
+ currentScript = scriptRun.script;
+ const bool isItalicRequired = fontRun.isItalicRequired;
+ const bool isBoldRequired = fontRun.isBoldRequired;
// Get the min index to the last character of both runs.
- CharacterIndex currentIndex = min( fontRun.characterRun.characterIndex + fontRun.characterRun.numberOfCharacters,
- scriptRun.characterRun.characterIndex + scriptRun.characterRun.numberOfCharacters );
+ CharacterIndex currentIndex = min(fontRun.characterRun.characterIndex + fontRun.characterRun.numberOfCharacters,
+ scriptRun.characterRun.characterIndex + scriptRun.characterRun.numberOfCharacters);
// Check if there is a line must break.
bool mustBreak = false;
- for( CharacterIndex index = previousIndex; index < currentIndex; ++index )
+
+ // Check if the current index is a new paragraph character.
+ // A new paragraph character is going to be shaped in order to not to mess the conversion tables.
+ // However, the metrics need to be changed in order to not to draw a square.
+ bool isNewParagraph = false;
+
+ for(CharacterIndex index = previousIndex; index < currentIndex; ++index)
{
- mustBreak = TextAbstraction::LINE_MUST_BREAK == *( lineBreakInfoBuffer + index );
- if( mustBreak )
+ mustBreak = TextAbstraction::LINE_MUST_BREAK == *(lineBreakInfoBuffer + index);
+ if(mustBreak)
{
- currentIndex = index;
+ isNewParagraph = TextAbstraction::IsNewParagraph(*(textBuffer + index));
+ currentIndex = index + 1u;
break;
}
}
- // Check if the current index is a white space. Do not want to shape a \n.
- // The last character is always a must-break even if it's not a \n.
- Length numberOfCharactersToShape = currentIndex - previousIndex;
- if( mustBreak && !TextAbstraction::IsWhiteSpace( *( textBuffer + currentIndex ) ) )
- {
- ++numberOfCharactersToShape;
- }
-
// Shape the text for the current chunk.
- const Length numberOfGlyphs = shaping.Shape( textBuffer + previousIndex,
- numberOfCharactersToShape,
- currentFontId,
- currentScript );
+ const Length numberOfGlyphs = shaping.Shape(textBuffer + previousIndex,
+ (currentIndex - previousIndex), // The number of characters to shape.
+ currentFontId,
+ currentScript);
- const Length glyphIndex = totalNumberOfGlyphs;
- totalNumberOfGlyphs += numberOfGlyphs;
+ // Retrieve the glyphs and the glyph to character conversion map.
+ Vector<GlyphInfo> tmpGlyphs;
+ Vector<CharacterIndex> tmpGlyphToCharacterMap;
- if( totalNumberOfGlyphs > numberOfGlyphsReserved )
- {
- // Resize the vectors to get enough space.
- numberOfGlyphsReserved = static_cast<Length>( totalNumberOfGlyphs * 1.3f );
- glyphs.Resize( numberOfGlyphsReserved );
- glyphToCharacterMap.Resize( numberOfGlyphsReserved );
-
- // Iterators are not valid anymore, set them again.
- glyphsBuffer = glyphs.Begin();
- glyphToCharacterMapBuffer = glyphToCharacterMap.Begin();
- }
+ GlyphInfo glyphInfo;
+ glyphInfo.isItalicRequired = isItalicRequired;
+ glyphInfo.isBoldRequired = isBoldRequired;
- // Retrieve the glyphs and the glyph to character conversion map.
- shaping.GetGlyphs( glyphsBuffer + glyphIndex,
- glyphToCharacterMapBuffer + glyphIndex );
+ tmpGlyphs.Resize(numberOfGlyphs, glyphInfo);
+ tmpGlyphToCharacterMap.Resize(numberOfGlyphs);
+ shaping.GetGlyphs(tmpGlyphs.Begin(),
+ tmpGlyphToCharacterMap.Begin());
- // Update indices.
- if( 0u != glyphIndex )
+ // Update the new indices of the glyph to character map.
+ if(0u != totalNumberOfGlyphs)
{
- for( Length index = glyphIndex; index < glyphIndex + numberOfGlyphs; ++index )
+ for(Vector<CharacterIndex>::Iterator it = tmpGlyphToCharacterMap.Begin(),
+ endIt = tmpGlyphToCharacterMap.End();
+ it != endIt;
+ ++it)
{
- CharacterIndex& characterIndex = *( glyphToCharacterMapBuffer + index );
- characterIndex += previousIndex;
+ *it += previousIndex;
}
}
+ totalNumberOfGlyphs += numberOfGlyphs;
+ numberOfNewGlyphs += numberOfGlyphs;
+
+ glyphs.Insert(glyphs.Begin() + glyphIndex, tmpGlyphs.Begin(), tmpGlyphs.End());
+ glyphToCharacterMap.Insert(glyphToCharacterMap.Begin() + glyphIndex, tmpGlyphToCharacterMap.Begin(), tmpGlyphToCharacterMap.End());
+ glyphIndex += numberOfGlyphs;
+
+ // Set the buffer pointers again.
+ glyphToCharacterMapBuffer = glyphToCharacterMap.Begin();
+
+ if(isNewParagraph)
+ {
+ // Add the index of the new paragraph glyph to a vector.
+ // Their metrics will be updated in a following step.
+ newParagraphGlyphs.PushBack(glyphIndex - 1u);
+ }
+
// Update the iterators to get the next font or script run.
- if( currentIndex == fontRun.characterRun.characterIndex + fontRun.characterRun.numberOfCharacters )
+ if(currentIndex == fontRun.characterRun.characterIndex + fontRun.characterRun.numberOfCharacters)
{
++fontRunIt;
}
- if( currentIndex == scriptRun.characterRun.characterIndex + scriptRun.characterRun.numberOfCharacters )
+ if(currentIndex == scriptRun.characterRun.characterIndex + scriptRun.characterRun.numberOfCharacters)
{
++scriptRunIt;
}
- // Update the previous index. Jumps the \n if needed.
- previousIndex = mustBreak ? currentIndex + 1u : currentIndex;
+ // Update the previous index.
+ previousIndex = currentIndex;
+ }
+
+ // Update indices.
+ for(Length index = startGlyphIndex + numberOfNewGlyphs; index < totalNumberOfGlyphs; ++index)
+ {
+ CharacterIndex& characterIndex = *(glyphToCharacterMapBuffer + index);
+ characterIndex += numberOfCharacters;
}
// Add the number of characters per glyph.
- charactersPerGlyph.Reserve( totalNumberOfGlyphs );
- previousIndex = 0u;
- for( Length index = 1u; index < totalNumberOfGlyphs; ++index )
+ charactersPerGlyph.Reserve(totalNumberOfGlyphs);
+ Length* charactersPerGlyphBuffer = charactersPerGlyph.Begin();
+
+ const GlyphIndex lastGlyph = startGlyphIndex + numberOfNewGlyphs;
+ previousIndex = startCharacterIndex;
+ for(Length index = startGlyphIndex + 1u; index < lastGlyph; ++index)
{
- const CharacterIndex characterIndex = *( glyphToCharacterMapBuffer + index );
+ const CharacterIndex characterIndex = *(glyphToCharacterMapBuffer + index);
- charactersPerGlyph.PushBack( characterIndex - previousIndex );
+ charactersPerGlyph.Insert(charactersPerGlyphBuffer + index - 1u, characterIndex - previousIndex);
previousIndex = characterIndex;
}
-
- charactersPerGlyph.PushBack( numberOfCharacters - previousIndex );
+ charactersPerGlyph.Insert(charactersPerGlyphBuffer + lastGlyph - 1u, numberOfCharacters + startCharacterIndex - previousIndex);
// Resize the vectors to set the right number of items.
- glyphs.Resize( totalNumberOfGlyphs );
- glyphToCharacterMap.Resize( totalNumberOfGlyphs );
-}
-
-void ShapeText( const LogicalModel& logicalModel,
- VisualModel& visualModel,
- CharacterIndex characterIndex,
- Length numberOfCharactersToRemove,
- Length numberOfCharactersToInsert )
-{
+ glyphs.Resize(totalNumberOfGlyphs);
+ glyphToCharacterMap.Resize(totalNumberOfGlyphs);
}
} // namespace Text
projects / platform / core / uifw / dali-toolkit.git / blobdiff