// FILE HEADER
#include <dali-toolkit/internal/text/bidirectional-support.h>
+// EXTERNAL INCLUDES
+#include <memory.h>
+#include <dali/devel-api/text-abstraction/bidirectional-support.h>
+
namespace Dali
{
namespace Text
{
+namespace
+{
+
+/**
+ * @brief Get the lines of a paragraph.
+ *
+ * @param[in] paragraphInfo The paragraph.
+ * @param[in] lines The lines.
+ * @param[in] lineIndex Index pointing the first line to be checked.
+ * @param[out] firstLine Index to the first line of the paragraph.
+ * @param[out] numberOfLines The number of lines.
+ */
+void GetLines( const BidirectionalParagraphInfoRun& paragraphInfo,
+ const Vector<LineRun>& lines,
+ unsigned int lineIndex,
+ unsigned int& firstLine,
+ unsigned int& numberOfLines )
+{
+ firstLine = lineIndex;
+ numberOfLines = 0u;
+
+ const CharacterIndex lastCharacterIndex = paragraphInfo.characterRun.characterIndex + paragraphInfo.characterRun.numberOfCharacters;
+ bool firstLineFound = false;
+
+ for( Vector<LineRun>::ConstIterator it = lines.Begin() + lineIndex,
+ endIt = lines.End();
+ it != endIt;
+ ++it )
+ {
+ const LineRun& line = *it;
+
+ if( ( line.characterRun.characterIndex + line.characterRun.numberOfCharacters > paragraphInfo.characterRun.characterIndex ) &&
+ ( lastCharacterIndex > line.characterRun.characterIndex ) )
+ {
+ firstLineFound = true;
+ ++numberOfLines;
+ }
+ else if( lastCharacterIndex <= line.characterRun.characterIndex )
+ {
+ // nothing else to do.
+ break;
+ }
+
+ if( !firstLineFound )
+ {
+ ++firstLine;
+ }
+ }
+}
+
+} // namespace
+
void SetBidirectionalInfo( const Vector<Character>& text,
+ const Vector<ScriptRun>& scripts,
const Vector<LineBreakInfo>& lineBreakInfo,
Vector<BidirectionalParagraphInfoRun>& bidirectionalInfo )
{
-}
+ // Traverse the script runs. If there is one with a right to left script, create the bidirectional info for the paragraph containing that script is needed.
+ // From the bidirectional point of view, a paragraph is the piece of text between two LINE_MUST_BREAK.
-void ReplaceBidirectionalInfo( LogicalModel& model,
- CharacterIndex characterIndex,
- Length numberOfCharactersToRemove,
- Length numberOfCharactersToInsert )
-{
+ // Index pointing the first character of the current paragraph.
+ CharacterIndex paragraphCharacterIndex = 0u;
+
+ // Pointer to the text buffer.
+ const Character* textBuffer = text.Begin();
+
+ // Pointer to the line break info buffer.
+ const LineBreakInfo* lineBreakInfoBuffer = lineBreakInfo.Begin();
+
+ // The number of characters.
+ const Length numberOfCharacters = text.Count();
+
+ // Handle to the bidirectional info module in text-abstraction.
+ TextAbstraction::BidirectionalSupport bidirectionalSupport = TextAbstraction::BidirectionalSupport::Get();
+
+ for( Vector<ScriptRun>::ConstIterator it = scripts.Begin(),
+ endIt = scripts.End();
+ it != endIt;
+ ++it )
+ {
+ const ScriptRun& scriptRun = *it;
+ const CharacterIndex lastScriptRunIndex = scriptRun.characterRun.characterIndex + scriptRun.characterRun.numberOfCharacters;
+
+ if( TextAbstraction::IsRightToLeftScript( scriptRun.script ) && // The script is right to left.
+ ( lastScriptRunIndex > paragraphCharacterIndex ) ) // It isn't part of a previous paragraph.
+ {
+ // Find the paragraphs which contains this script run.
+ // Consider:
+ // 1) Different paragraphs may contain this script run.
+ // ------||------------------- rtl sr ------------------------||-------------------
+ // --||----- p -----||------------------ p -------------||-------- p ------||------
+ //
+ // 2) The paragraph which contains this script run may contain other right to left script runs.
+ // -----||--- rtl sr ---||---- ltr sr ----||---------- rtl sr -----------||--------
+ // -----||---------------------------------- p -----------------------------------|
+
+ while( lastScriptRunIndex > paragraphCharacterIndex )
+ {
+ // There is a paragraph which contains the current script.
+
+ Length index = paragraphCharacterIndex;
+ while( ( index < numberOfCharacters ) && ( paragraphCharacterIndex < lastScriptRunIndex ) )
+ {
+ if( TextAbstraction::LINE_MUST_BREAK == *( lineBreakInfoBuffer + index ) )
+ {
+ if( index >= scriptRun.characterRun.characterIndex )
+ {
+ // The Bidirectional run must have the same number of characters than the paragraph.
+ BidirectionalParagraphInfoRun bidirectionalRun;
+ bidirectionalRun.characterRun.characterIndex = paragraphCharacterIndex;
+ bidirectionalRun.characterRun.numberOfCharacters = ( index - paragraphCharacterIndex ) + 1u; // The must break character is part of the paragrah.
+
+ // Create the bidirectional info for the whole paragraph and store the index to the table with this info in the run.
+ bidirectionalRun.bidirectionalInfoIndex = bidirectionalSupport.CreateInfo( textBuffer + bidirectionalRun.characterRun.characterIndex,
+ bidirectionalRun.characterRun.numberOfCharacters );
+
+ bidirectionalInfo.PushBack( bidirectionalRun );
+ }
+
+ // Update the character index of the next paragraph.
+ paragraphCharacterIndex = index + 1u;
+ }
+ ++index;
+ }
+
+ // The last character is always a must-break, so there is no need to check if there is characters left.
+ }
+ }
+ }
}
void ReorderLines( const Vector<BidirectionalParagraphInfoRun>& bidirectionalInfo,
- const Vector<CharacterRun>& lineRuns,
+ Vector<LineRun>& lineRuns,
Vector<BidirectionalLineInfoRun>& lineInfoRuns )
{
+ // Handle to the bidirectional info module in text-abstraction.
+ TextAbstraction::BidirectionalSupport bidirectionalSupport = TextAbstraction::BidirectionalSupport::Get();
+
+ // Keep an index to the first line to be checked if it's contained inside the paragraph.
+ // Avoids check the lines from the beginning for each paragraph.
+ unsigned int lineIndex = 0u;
+
+ for( Vector<BidirectionalParagraphInfoRun>::ConstIterator it = bidirectionalInfo.Begin(),
+ endIt = bidirectionalInfo.End();
+ it != endIt;
+ ++it )
+ {
+ const BidirectionalParagraphInfoRun& paragraphInfo = *it;
+ const CharacterDirection direction = bidirectionalSupport.GetParagraphDirection( paragraphInfo.bidirectionalInfoIndex );
+
+ // Get the lines for this paragraph.
+ unsigned int firstLine = 0u;
+ unsigned int numberOfLines = 0u;
+
+ // Get an index to the first line and the number of lines of the current paragraph.
+ GetLines( paragraphInfo,
+ lineRuns,
+ lineIndex,
+ firstLine,
+ numberOfLines );
+
+ lineIndex = firstLine + numberOfLines;
+
+ // Traverse the lines and reorder them
+ for( Vector<LineRun>::Iterator lineIt = lineRuns.Begin() + firstLine,
+ endLineIt = lineRuns.Begin() + firstLine + numberOfLines;
+ lineIt != endLineIt;
+ ++lineIt )
+ {
+ LineRun& line = *lineIt;
+
+ // Sets the paragraph's direction.
+ line.direction = direction;
+
+ // Creates a bidirectional info for the line run.
+ BidirectionalLineInfoRun lineInfoRun;
+ lineInfoRun.characterRun.characterIndex = line.characterRun.characterIndex;
+ lineInfoRun.characterRun.numberOfCharacters = line.characterRun.numberOfCharacters;
+ lineInfoRun.direction = direction;
+
+ // Allocate space for the conversion maps.
+ // The memory is freed after the visual to logical to visual conversion tables are built in the logical model.
+ lineInfoRun.visualToLogicalMap = reinterpret_cast<CharacterIndex*>( malloc( line.characterRun.numberOfCharacters * sizeof( CharacterIndex ) ) );
+
+ if( NULL != lineInfoRun.visualToLogicalMap )
+ {
+ // Reorders the line.
+ bidirectionalSupport.Reorder( paragraphInfo.bidirectionalInfoIndex,
+ line.characterRun.characterIndex - paragraphInfo.characterRun.characterIndex,
+ line.characterRun.numberOfCharacters,
+ lineInfoRun.visualToLogicalMap );
+ }
+
+ // Push the run into the vector.
+ lineInfoRuns.PushBack( lineInfoRun );
+ }
+ }
+}
+
+bool GetMirroredText( const Vector<Character>& text,
+ Vector<Character>& mirroredText,
+ const Vector<BidirectionalParagraphInfoRun>& bidirectionalInfo )
+{
+ bool hasTextMirrored = false;
+
+ // Handle to the bidirectional info module in text-abstraction.
+ TextAbstraction::BidirectionalSupport bidirectionalSupport = TextAbstraction::BidirectionalSupport::Get();
+
+ mirroredText = text;
+
+ Character* mirroredTextBuffer = mirroredText.Begin();
+
+ // Traverse the paragraphs and mirror the right to left ones.
+ for( Vector<BidirectionalParagraphInfoRun>::ConstIterator it = bidirectionalInfo.Begin(),
+ endIt = bidirectionalInfo.End();
+ it != endIt;
+ ++it )
+ {
+ const BidirectionalParagraphInfoRun& run = *it;
+
+ const bool tmpMirrored = bidirectionalSupport.GetMirroredText( mirroredTextBuffer + run.characterRun.characterIndex,
+ run.characterRun.numberOfCharacters );
+
+ hasTextMirrored = hasTextMirrored || tmpMirrored;
+ }
+
+ return hasTextMirrored;
}
-void ReorderLines( LogicalModel& logicalModel,
- const VisualModel& visualModel,
- CharacterIndex characterIndex,
- Length numberOfCharactersToRemove,
- Length numberOfCharactersToInsert )
+void GetCharactersDirection( const Vector<BidirectionalParagraphInfoRun>& bidirectionalInfo,
+ Vector<CharacterDirection>& directions )
{
+ // Handle to the bidirectional info module in text-abstraction.
+ TextAbstraction::BidirectionalSupport bidirectionalSupport = TextAbstraction::BidirectionalSupport::Get();
+
+ CharacterIndex index = 0u;
+ CharacterDirection* directionsBuffer = directions.Begin();
+ for( Vector<BidirectionalParagraphInfoRun>::ConstIterator it = bidirectionalInfo.Begin(),
+ endIt = bidirectionalInfo.End();
+ it != endIt;
+ ++it )
+ {
+ const BidirectionalParagraphInfoRun& paragraph = *it;
+
+ // Fills with left to right those paragraphs without right to left characters.
+ memset( directionsBuffer + index, false, ( paragraph.characterRun.characterIndex - index ) * sizeof( bool ) );
+ index += paragraph.characterRun.numberOfCharacters;
+
+ bidirectionalSupport.GetCharactersDirection( paragraph.bidirectionalInfoIndex,
+ directionsBuffer + paragraph.characterRun.characterIndex,
+ paragraph.characterRun.numberOfCharacters );
+ }
+
+ // Fills with left to right those paragraphs without right to left characters.
+ memset( directionsBuffer + index, false, ( directions.Count() - index ) * sizeof( bool ) );
}
} // namespace Text
projects / platform / core / uifw / dali-toolkit.git / blobdiff