Review request - fix issue 6103 and 13217 -- mirror download item in download shelf

views/view.h

 // Copyright (c) 2006-2008 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 VIEWS_VIEW_H_
 #define VIEWS_VIEW_H_
 
 #include "build/build_config.h"
 
 #include <algorithm>
@@ skipping 328 matching lines @@
   // Following are a few examples of the values returned by this function for
   // a View with the bounds {0, 0, 100, 100} and a right-to-left layout:
   //
   // MirroredXCoordinateInsideView(0) -> 100
   // MirroredXCoordinateInsideView(20) -> 80
   // MirroredXCoordinateInsideView(99) -> 1
   int MirroredXCoordinateInsideView(int x) const {
     return UILayoutIsRightToLeft() ? width() - x : x;
   }
 
+  // Given a X coordinate and a width inside the View, this function returns
+  // the mirrored X coordinate if the View's UI layout is right-to-left. If the
+  // layout is left-to-right, the same X coordinate is returned.
+  //
+  // Following are a few examples of the values returned by this function for
+  // a View with the bounds {0, 0, 100, 100} and a right-to-left layout:
+  //
+  // MirroredXCoordinateInsideView(0, 10) -> 90
+  // MirroredXCoordinateInsideView(20, 20) -> 60
+  int MirroredXWithWidthInsideView(int x, int w) const {
+    return UILayoutIsRightToLeft() ? width() - x - w : x;
+  }
+
   // Painting functions
 
   // Mark the specified rectangle as dirty (needing repaint). If |urgent| is
   // true, the view will be repainted when the current event processing is
   // done. Otherwise, painting will take place as soon as possible.
   virtual void SchedulePaint(const gfx::Rect& r, bool urgent);
 
   // Mark the entire View's bounds as dirty. Painting will occur as soon as
   // possible.
   virtual void SchedulePaint();
@@ skipping 844 matching lines @@
   // is going to be flipped horizontally (using the appropriate transform) on
   // right-to-left locales for this View.
   bool flip_canvas_on_paint_for_rtl_ui_;
 
   DISALLOW_COPY_AND_ASSIGN(View);
 };
 
 }  // namespace views
 
 #endif  // VIEWS_VIEW_H_