{
void SetLineBreakInfo( const Vector<Character>& text,
+ CharacterIndex startIndex,
+ Length numberOfCharacters,
Vector<LineBreakInfo>& lineBreakInfo )
{
- const Length numberOfCharacters = text.Count();
+ const Length totalNumberOfCharacters = text.Count();
- if( 0u == numberOfCharacters )
+ if( 0u == totalNumberOfCharacters )
{
// Nothing to do if there are no characters.
return;
}
// Retrieve the line break info.
- lineBreakInfo.Resize( numberOfCharacters );
- TextAbstraction::Segmentation::Get().GetLineBreakPositions( text.Begin(),
+ lineBreakInfo.Resize( totalNumberOfCharacters );
+
+ // Whether the current buffer is being updated or is set from scratch.
+ const bool updateCurrentBuffer = numberOfCharacters < totalNumberOfCharacters;
+
+ LineBreakInfo* lineBreakInfoBuffer = NULL;
+ Vector<LineBreakInfo> newLineBreakInfo;
+
+ if( updateCurrentBuffer )
+ {
+ newLineBreakInfo.Resize( numberOfCharacters );
+ lineBreakInfoBuffer = newLineBreakInfo.Begin();
+ }
+ else
+ {
+ lineBreakInfoBuffer = lineBreakInfo.Begin();
+ }
+
+ // Retrieve the line break info.
+ TextAbstraction::Segmentation::Get().GetLineBreakPositions( text.Begin() + startIndex,
numberOfCharacters,
- lineBreakInfo.Begin() );
+ lineBreakInfoBuffer );
+
+ // If the line break info is updated, it needs to be inserted in the model.
+ if( updateCurrentBuffer )
+ {
+ lineBreakInfo.Insert( lineBreakInfo.Begin() + startIndex,
+ newLineBreakInfo.Begin(),
+ newLineBreakInfo.End() );
+ lineBreakInfo.Resize( totalNumberOfCharacters );
+ }
+
#ifdef DEBUG_ENABLED
if( gLogFilter->IsEnabledFor(Debug::Verbose) )
{