+void LogicalModel::ClearFontDescriptionRuns()
+{
+ FreeFontFamilyNames(mFontDescriptionRuns);
+}
+
+void LogicalModel::CreateParagraphInfo(CharacterIndex startIndex,
+ Length numberOfCharacters)
+{
+ const Length totalNumberOfCharacters = mLineBreakInfo.Count();
+
+ // Count the number of LINE_MUST_BREAK to reserve some space for the vector of paragraph's info.
+ Vector<CharacterIndex> paragraphs;
+ paragraphs.Reserve(numberOfCharacters);
+ const TextAbstraction::LineBreakInfo* lineBreakInfoBuffer = mLineBreakInfo.Begin();
+ const CharacterIndex lastCharacterIndexPlusOne = startIndex + numberOfCharacters;
+ for(Length index = startIndex; index < lastCharacterIndexPlusOne; ++index)
+ {
+ if(TextAbstraction::LINE_MUST_BREAK == *(lineBreakInfoBuffer + index))
+ {
+ paragraphs.PushBack(index);
+ }
+ }
+
+ // Whether the current paragraphs are updated or set from scratch.
+ const bool updateCurrentParagraphs = numberOfCharacters < totalNumberOfCharacters;
+
+ // Reserve space for current paragraphs plus new ones.
+ const Length numberOfNewParagraphs = paragraphs.Count();
+ const Length totalNumberOfParagraphs = mParagraphInfo.Count() + numberOfNewParagraphs;
+ mParagraphInfo.Resize(totalNumberOfParagraphs);
+
+ ParagraphRun* paragraphInfoBuffer = NULL;
+ Vector<ParagraphRun> newParagraphs;
+
+ if(updateCurrentParagraphs)
+ {
+ newParagraphs.Resize(numberOfNewParagraphs);
+ paragraphInfoBuffer = newParagraphs.Begin();
+ }
+ else
+ {
+ paragraphInfoBuffer = mParagraphInfo.Begin();
+ }
+
+ // Find where to insert the new paragraphs.
+ ParagraphRunIndex paragraphIndex = 0u;
+ CharacterIndex firstIndex = startIndex;
+
+ if(updateCurrentParagraphs)
+ {
+ for(Vector<ParagraphRun>::ConstIterator it = mParagraphInfo.Begin(),
+ endIt = mParagraphInfo.Begin() + totalNumberOfParagraphs - numberOfNewParagraphs;
+ it != endIt;
+ ++it)
+ {
+ const ParagraphRun& paragraph(*it);
+
+ if(startIndex < paragraph.characterRun.characterIndex + paragraph.characterRun.numberOfCharacters)