Use cached composition bounds for firstRectForCharacterRange

content/browser/renderer_host/render_widget_host_view_mac.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_MAC_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_MAC_H_
 #pragma once
 
 #import <Cocoa/Cocoa.h>
 #include <list>
@@ skipping 313 matching lines @@
   const std::string& selected_text() const { return selected_text_; }
 
   // Call setNeedsDisplay on the cocoa_view_. The IOSurface will be drawn during
   // the next drawRect. Return true if the Ack should be sent, false if it
   // should be deferred until drawRect.
   bool CompositorSwapBuffers(uint64 surface_handle);
   // Ack pending SwapBuffers requests, if any, to unblock the GPU process. Has
   // no effect if there are no pending requests.
   void AckPendingSwapBuffers();
 
+  // Returns true and store first rectangle for character range if the requested
+  // |range| is already cached otherwise return false.
+  bool GetCachedFirstRectForCharacterRange(NSRange range, NSRect* rect,
+                                           NSRange* actual_range);
+
+  // Returns true if there is line break in |range| and store line breaking
+  // point to |line_breaking_point|. The |line_breaking_point| is valid only if
+  // this function returns true.
+  bool GetLineBreakIdx(const std::vector<gfx::Rect>& bounds,
+                       const ui::Range& range,
+                       size_t* line_break_point);
+
+  // Returns composition character boundary rectangle. The |range| is
+  // composition based range. Also store |actual_range| which is corresponding
+  // to actually used range for returned rectangle.
+  gfx::Rect GetFirstRectForCompositionRange(const ui::Range& range,
+                                            ui::Range* actual_range);
+
+  // Converts from given whole character range to composition oriented range. If
+  // the conversion failed, return ui::Range::InvalidRange.
+  ui::Range ConvertCharacterRangeToCompositionRange(
+      const ui::Range& request_range);
+
   // These member variables should be private, but the associated ObjC class
   // needs access to them and can't be made a friend.
 
   // The associated Model.  Can be NULL if Destroy() is called when
   // someone (other than superview) has retained |cocoa_view_|.
   content::RenderWidgetHostImpl* render_widget_host_;
 
   // This is true when we are currently painting and thus should handle extra
   // paint requests by expanding the invalid rect rather than actually painting.
   bool about_to_validate_and_paint_;
@@ skipping 76 matching lines @@
   std::string selected_text_;
 
   // The fullscreen window used for pepper flash.
   scoped_nsobject<NSWindow> pepper_fullscreen_window_;
   scoped_nsobject<FullscreenWindowManager> fullscreen_window_manager_;
 
   // List of pending swaps for deferred acking:
   //   pairs of (route_id, gpu_host_id).
   std::list<std::pair<int32, int32> > pending_swap_buffers_acks_;
 
+  ui::Range composition_range_;
+  std::vector<gfx::Rect> composition_bounds_;
+
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewMac);
 };
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_MAC_H_