avoid calling -documentView repeatedly for tool tip rects
avoid calling -documentView repeatedly for tool tip rects
ycaihua/skim-app,WoLpH/skim,WoLpH/skim,WoLpH/skim,ycaihua/skim-app,WoLpH/skim,ycaihua/skim-app,ycaihua/skim-app,WoLpH/skim,ycaihua/skim-app