Cross-process iframe accessibility.

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 <map>
 #include <utility>
 #include <vector>
@@ skipping 13 matching lines @@
 namespace content {
 class BrowserAccessibilityManager;
 #if defined(OS_WIN)
 class BrowserAccessibilityWin;
 #endif
 
 ////////////////////////////////////////////////////////////////////////////////
 //
 // BrowserAccessibility
 //
-// Class implementing the cross platform interface for the Browser-Renderer
-// communication of accessibility information, providing accessibility
-// to be used by screen readers and other assistive technology (AT).
+// A BrowserAccessibility object represents one node in the accessibility
+// tree on the browser side. It exactly corresponds to one WebAXObject from
+// Blink. It's owned by a BrowserAccessibilityManager.
 //
-// An implementation for each platform handles platform specific accessibility
-// APIs.
+// There are subclasses of BrowserAccessibility for each platform where
+// we implement native accessibility APIs. This base class is used occasionally
+// for tests.
 //
 ////////////////////////////////////////////////////////////////////////////////
 class CONTENT_EXPORT BrowserAccessibility {
  public:
   // Creates a platform specific BrowserAccessibility. Ownership passes to the
   // caller.
   static BrowserAccessibility* Create();
 
   virtual ~BrowserAccessibility();
 
@@ skipping 188 matching lines @@
 
   // Returns true if the bit corresponding to the given state enum is 1.
   bool HasState(ui::AXState state_enum) const;
 
   // Returns true if this node is an editable text field of any kind.
   bool IsEditableText() const;
 
   // Append the text from this node and its children.
   std::string GetTextRecursive() const;
 
+  // Identifies the given frame tree node id as the only child of this node,
+  // so any call to PlatformChildCount/PlatformGetChild will use
+  // BrowserAccessibilityDelegate::AccessibilityGetChildFrame to retrieve
+  // the BrowserAccessibilityManager of the child frame and return its root
+  // node as this node's child.
+  void SetChildFrameTreeNodeId(int64 child_frame_tree_node_id);
+
+  int64 child_frame_tree_node_id() const { return child_frame_tree_node_id_; }
+
  protected:
   BrowserAccessibility();
 
   // The manager of this tree of accessibility objects.
   BrowserAccessibilityManager* manager_;
 
   // The underlying node.
   ui::AXNode* node_;
 
  private:
   // Return the sum of the lengths of all static text descendants,
   // including this object if it's static text.
   int GetStaticTextLenRecursive() const;
 
   std::string name_;
   std::string value_;
 
- private:
+  // If nonzero, the frame tree node id of the child frame of this node.
+  int64 child_frame_tree_node_id_;
+
   DISALLOW_COPY_AND_ASSIGN(BrowserAccessibility);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_H_