+void Controller::Impl::CalculateTextUpdateIndices( Length& numberOfCharacters )
+{
+ mTextUpdateInfo.mParagraphCharacterIndex = 0u;
+ mTextUpdateInfo.mStartGlyphIndex = 0u;
+ mTextUpdateInfo.mStartLineIndex = 0u;
+ numberOfCharacters = 0u;
+
+ const Length numberOfParagraphs = mLogicalModel->mParagraphInfo.Count();
+ if( 0u == numberOfParagraphs )
+ {
+ mTextUpdateInfo.mParagraphCharacterIndex = 0u;
+ numberOfCharacters = 0u;
+
+ mTextUpdateInfo.mRequestedNumberOfCharacters = mTextUpdateInfo.mNumberOfCharactersToAdd - mTextUpdateInfo.mNumberOfCharactersToRemove;
+
+ // Nothing else to do if there are no paragraphs.
+ return;
+ }
+
+ // Find the paragraphs to be updated.
+ Vector<ParagraphRunIndex> paragraphsToBeUpdated;
+ if( mTextUpdateInfo.mCharacterIndex >= mTextUpdateInfo.mPreviousNumberOfCharacters )
+ {
+ // Text is being added at the end of the current text.
+ if( mTextUpdateInfo.mIsLastCharacterNewParagraph )
+ {
+ // Text is being added in a new paragraph after the last character of the text.
+ mTextUpdateInfo.mParagraphCharacterIndex = mTextUpdateInfo.mPreviousNumberOfCharacters;
+ numberOfCharacters = 0u;
+ mTextUpdateInfo.mRequestedNumberOfCharacters = mTextUpdateInfo.mNumberOfCharactersToAdd - mTextUpdateInfo.mNumberOfCharactersToRemove;
+
+ mTextUpdateInfo.mStartGlyphIndex = mVisualModel->mGlyphs.Count();
+ mTextUpdateInfo.mStartLineIndex = mVisualModel->mLines.Count() - 1u;
+
+ // Nothing else to do;
+ return;
+ }
+
+ paragraphsToBeUpdated.PushBack( numberOfParagraphs - 1u );
+ }
+ else
+ {
+ Length numberOfCharactersToUpdate = 0u;
+ if( mTextUpdateInfo.mFullRelayoutNeeded )
+ {
+ numberOfCharactersToUpdate = mTextUpdateInfo.mPreviousNumberOfCharacters;
+ }
+ else
+ {
+ numberOfCharactersToUpdate = ( mTextUpdateInfo.mNumberOfCharactersToRemove > 0u ) ? mTextUpdateInfo.mNumberOfCharactersToRemove : 1u;
+ }
+ mLogicalModel->FindParagraphs( mTextUpdateInfo.mCharacterIndex,
+ numberOfCharactersToUpdate,
+ paragraphsToBeUpdated );
+ }
+
+ if( 0u != paragraphsToBeUpdated.Count() )
+ {
+ const ParagraphRunIndex firstParagraphIndex = *( paragraphsToBeUpdated.Begin() );
+ const ParagraphRun& firstParagraph = *( mLogicalModel->mParagraphInfo.Begin() + firstParagraphIndex );
+ mTextUpdateInfo.mParagraphCharacterIndex = firstParagraph.characterRun.characterIndex;
+
+ ParagraphRunIndex lastParagraphIndex = *( paragraphsToBeUpdated.End() - 1u );
+ const ParagraphRun& lastParagraph = *( mLogicalModel->mParagraphInfo.Begin() + lastParagraphIndex );
+
+ if( ( mTextUpdateInfo.mNumberOfCharactersToRemove > 0u ) && // Some character are removed.
+ ( lastParagraphIndex < numberOfParagraphs - 1u ) && // There is a next paragraph.
+ ( ( lastParagraph.characterRun.characterIndex + lastParagraph.characterRun.numberOfCharacters ) == // The last removed character is the new paragraph character.
+ ( mTextUpdateInfo.mCharacterIndex + mTextUpdateInfo.mNumberOfCharactersToRemove ) ) )
+ {
+ // The new paragraph character of the last updated paragraph has been removed so is going to be merged with the next one.
+ const ParagraphRun& lastParagraph = *( mLogicalModel->mParagraphInfo.Begin() + lastParagraphIndex + 1u );
+
+ numberOfCharacters = lastParagraph.characterRun.characterIndex + lastParagraph.characterRun.numberOfCharacters - mTextUpdateInfo.mParagraphCharacterIndex;
+ }
+ else
+ {
+ numberOfCharacters = lastParagraph.characterRun.characterIndex + lastParagraph.characterRun.numberOfCharacters - mTextUpdateInfo.mParagraphCharacterIndex;
+ }
+ }
+
+ mTextUpdateInfo.mRequestedNumberOfCharacters = numberOfCharacters + mTextUpdateInfo.mNumberOfCharactersToAdd - mTextUpdateInfo.mNumberOfCharactersToRemove;
+ mTextUpdateInfo.mStartGlyphIndex = *( mVisualModel->mCharactersToGlyph.Begin() + mTextUpdateInfo.mParagraphCharacterIndex );
+}
+
+void Controller::Impl::ClearFullModelData( OperationsMask operations )
+{
+ if( NO_OPERATION != ( GET_LINE_BREAKS & operations ) )
+ {
+ mLogicalModel->mLineBreakInfo.Clear();
+ mLogicalModel->mParagraphInfo.Clear();
+ }
+
+ if( NO_OPERATION != ( GET_WORD_BREAKS & operations ) )
+ {
+ mLogicalModel->mLineBreakInfo.Clear();
+ }
+
+ if( NO_OPERATION != ( GET_SCRIPTS & operations ) )
+ {
+ mLogicalModel->mScriptRuns.Clear();
+ }
+
+ if( NO_OPERATION != ( VALIDATE_FONTS & operations ) )
+ {
+ mLogicalModel->mFontRuns.Clear();
+ }
+
+ if( 0u != mLogicalModel->mBidirectionalParagraphInfo.Count() )
+ {
+ if( NO_OPERATION != ( BIDI_INFO & operations ) )
+ {
+ mLogicalModel->mBidirectionalParagraphInfo.Clear();
+ mLogicalModel->mCharacterDirections.Clear();
+ }
+
+ if( NO_OPERATION != ( REORDER & operations ) )
+ {
+ // Free the allocated memory used to store the conversion table in the bidirectional line info run.
+ for( Vector<BidirectionalLineInfoRun>::Iterator it = mLogicalModel->mBidirectionalLineInfo.Begin(),
+ endIt = mLogicalModel->mBidirectionalLineInfo.End();
+ it != endIt;
+ ++it )
+ {
+ BidirectionalLineInfoRun& bidiLineInfo = *it;
+
+ free( bidiLineInfo.visualToLogicalMap );
+ bidiLineInfo.visualToLogicalMap = NULL;
+ }
+ mLogicalModel->mBidirectionalLineInfo.Clear();
+ }
+ }
+
+ if( NO_OPERATION != ( SHAPE_TEXT & operations ) )
+ {
+ mVisualModel->mGlyphs.Clear();
+ mVisualModel->mGlyphsToCharacters.Clear();
+ mVisualModel->mCharactersToGlyph.Clear();
+ mVisualModel->mCharactersPerGlyph.Clear();
+ mVisualModel->mGlyphsPerCharacter.Clear();
+ mVisualModel->mGlyphPositions.Clear();
+ }
+
+ if( NO_OPERATION != ( LAYOUT & operations ) )
+ {
+ mVisualModel->mLines.Clear();
+ }
+
+ if( NO_OPERATION != ( COLOR & operations ) )
+ {
+ mVisualModel->mColorIndices.Clear();
+ }
+}
+
+void Controller::Impl::ClearCharacterModelData( CharacterIndex startIndex, CharacterIndex endIndex, OperationsMask operations )
+{
+ const CharacterIndex endIndexPlusOne = endIndex + 1u;
+
+ if( NO_OPERATION != ( GET_LINE_BREAKS & operations ) )
+ {
+ // Clear the line break info.
+ LineBreakInfo* lineBreakInfoBuffer = mLogicalModel->mLineBreakInfo.Begin();
+
+ mLogicalModel->mLineBreakInfo.Erase( lineBreakInfoBuffer + startIndex,
+ lineBreakInfoBuffer + endIndexPlusOne );
+
+ // Clear the paragraphs.
+ ClearCharacterRuns( startIndex,
+ endIndex,
+ mLogicalModel->mParagraphInfo );
+ }
+
+ if( NO_OPERATION != ( GET_WORD_BREAKS & operations ) )
+ {
+ // Clear the word break info.
+ WordBreakInfo* wordBreakInfoBuffer = mLogicalModel->mWordBreakInfo.Begin();
+
+ mLogicalModel->mWordBreakInfo.Erase( wordBreakInfoBuffer + startIndex,
+ wordBreakInfoBuffer + endIndexPlusOne );
+ }
+
+ if( NO_OPERATION != ( GET_SCRIPTS & operations ) )
+ {
+ // Clear the scripts.
+ ClearCharacterRuns( startIndex,
+ endIndex,
+ mLogicalModel->mScriptRuns );
+ }
+
+ if( NO_OPERATION != ( VALIDATE_FONTS & operations ) )
+ {
+ // Clear the fonts.
+ ClearCharacterRuns( startIndex,
+ endIndex,
+ mLogicalModel->mFontRuns );
+ }
+
+ if( 0u != mLogicalModel->mBidirectionalParagraphInfo.Count() )
+ {
+ if( NO_OPERATION != ( BIDI_INFO & operations ) )
+ {
+ // Clear the bidirectional paragraph info.
+ ClearCharacterRuns( startIndex,
+ endIndex,
+ mLogicalModel->mBidirectionalParagraphInfo );
+
+ // Clear the character's directions.
+ CharacterDirection* characterDirectionsBuffer = mLogicalModel->mCharacterDirections.Begin();
+
+ mLogicalModel->mCharacterDirections.Erase( characterDirectionsBuffer + startIndex,
+ characterDirectionsBuffer + endIndexPlusOne );
+ }
+
+ if( NO_OPERATION != ( REORDER & operations ) )
+ {
+ uint32_t startRemoveIndex = mLogicalModel->mBidirectionalLineInfo.Count();
+ uint32_t endRemoveIndex = startRemoveIndex;
+ ClearCharacterRuns( startIndex,
+ endIndex,
+ mLogicalModel->mBidirectionalLineInfo,
+ startRemoveIndex,
+ endRemoveIndex );
+
+ BidirectionalLineInfoRun* bidirectionalLineInfoBuffer = mLogicalModel->mBidirectionalLineInfo.Begin();
+
+ // Free the allocated memory used to store the conversion table in the bidirectional line info run.
+ for( Vector<BidirectionalLineInfoRun>::Iterator it = bidirectionalLineInfoBuffer + startRemoveIndex,
+ endIt = bidirectionalLineInfoBuffer + endRemoveIndex;
+ it != endIt;
+ ++it )
+ {
+ BidirectionalLineInfoRun& bidiLineInfo = *it;
+
+ free( bidiLineInfo.visualToLogicalMap );
+ bidiLineInfo.visualToLogicalMap = NULL;
+ }
+
+ mLogicalModel->mBidirectionalLineInfo.Erase( bidirectionalLineInfoBuffer + startRemoveIndex,
+ bidirectionalLineInfoBuffer + endRemoveIndex );
+ }
+ }
+}
+
+void Controller::Impl::ClearGlyphModelData( CharacterIndex startIndex, CharacterIndex endIndex, OperationsMask operations )