Correctly finds line boundaries in objects with rich text on Windows.

content/browser/accessibility/browser_accessibility.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_ACCESSIBILITY_BROWSER_ACCESSIBILITY_H_
 #define CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 112 matching lines @@
   // platform.
   bool PlatformIsChildOfLeaf() const;
 
   // If this object is exposed to the platform, returns this object. Otherwise,
   // returns the platform leaf under which this object is found.
   BrowserAccessibility* GetClosestPlatformObject() const;
 
   BrowserAccessibility* GetPreviousSibling() const;
   BrowserAccessibility* GetNextSibling() const;
 
+  bool IsPreviousSiblingOnSameLine() const;
+  bool IsNextSiblingOnSameLine() const;
+
   // Returns nullptr if there are no children.
   BrowserAccessibility* PlatformDeepestFirstChild() const;
   // Returns nullptr if there are no children.
   BrowserAccessibility* PlatformDeepestLastChild() const;
 
   // Returns nullptr if there are no children.
   BrowserAccessibility* InternalDeepestFirstChild() const;
   // Returns nullptr if there are no children.
   BrowserAccessibility* InternalDeepestLastChild() const;
 
@@ skipping 10 matching lines @@
   gfx::Rect GetLocalBoundsForRange(int start, int len) const;
 
   // Same as GetLocalBoundsForRange, in screen coordinates. Only valid when
   // the role is WebAXRoleStaticText.
   gfx::Rect GetGlobalBoundsForRange(int start, int len) const;
 
   // This is to handle the cases such as ARIA textbox, where the value should
   // be calculated from the object's inner text.
   virtual base::string16 GetValue() const;
 
-  // Searches in the given text and from the given offset until the start of
-  // the next or previous word is found and returns its position.
+  // Starting at the given character offset, locates the start of the next or
+  // previous line and returns its character offset.
+  int GetLineStartBoundary(int start,
+                           ui::TextBoundaryDirection direction) const;
+
+  // Starting at the given character offset, locates the start of the next or
+  // previous word and returns its character offset.
   // In case there is no word boundary before or after the given offset, it
-  // returns one past the last character, i.e. the text's length.
+  // returns one past the last character.
   // If the given offset is already at the start of a word, returns the start
-  // of the next word if the search is forwards and the given offset if it is
+  // of the next word if the search is forwards, and the given offset if it is
   // backwards.
   // If the start offset is equal to -1 and the search is in the forwards
   // direction, returns the start boundary of the first word.
   // Start offsets that are not in the range -1 to text length are invalid.
-  int GetWordStartBoundary(
-      int start, ui::TextBoundaryDirection direction) const;
+  int GetWordStartBoundary(int start,
+                           ui::TextBoundaryDirection direction) const;
 
   // Returns the deepest descendant that contains the specified point
   // (in global screen coordinates).
   BrowserAccessibility* BrowserAccessibilityForPoint(const gfx::Point& point);
 
   // Marks this object for deletion, releases our reference to it, and
   // nulls out the pointer to the underlying AXNode.  May not delete
   // the object immediately due to reference counting.
   //
   // Reference counting is used on some platforms because the
@@ skipping 176 matching lines @@
   // its nearest scrollable ancestor) to local bounds (which are relative
   // to the top of the web accessibility tree).
   gfx::Rect ElementBoundsToLocalBounds(gfx::Rect bounds) const;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserAccessibility);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_H_