Add initial GTK web accessibility framework (third attempt).

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_
 #pragma once
 
 #include <map>
 #include <utility>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "build/build_config.h"
 #include "content/common/content_export.h"
 #include "webkit/glue/webaccessibility.h"
 
 class BrowserAccessibilityManager;
 #if defined(OS_MACOSX) && __OBJC__
 @class BrowserAccessibilityCocoa;
 #elif defined(OS_WIN)
 class BrowserAccessibilityWin;
+#elif defined(TOOLKIT_GTK)
+class BrowserAccessibilityGtk;
 #endif
 
 using webkit_glue::WebAccessibility;
 typedef std::map<WebAccessibility::BoolAttribute, bool> BoolAttrMap;
 typedef std::map<WebAccessibility::FloatAttribute, float> FloatAttrMap;
 typedef std::map<WebAccessibility::IntAttribute, int> IntAttrMap;
 typedef std::map<WebAccessibility::StringAttribute, string16> StringAttrMap;
 
 ////////////////////////////////////////////////////////////////////////////////
 //
@@ skipping 18 matching lines @@
   // Detach all descendants of this subtree and push all of the node pointers,
   // including this node, onto the end of |nodes|.
   virtual void DetachTree(std::vector<BrowserAccessibility*>* nodes);
 
   // Perform platform specific initialization. This can be called multiple times
   // during the lifetime of this instance after the members of this base object
   // have been reset with new values from the renderer process.
   // Child dependent initialization can be done here.
   virtual void PostInitialize() {}
 
+  // Returns true if this is a native platform-specific object, vs a
+  // cross-platform generic object.
+  virtual bool IsNative() const;
+
   // Initialize this object, reading attributes from |src|. Does not
   // recurse into children of |src| and build the whole subtree.
   void PreInitialize(BrowserAccessibilityManager* manager,
       BrowserAccessibility* parent,
       int32 child_id,
       int32 index_in_parent,
       const WebAccessibility& src);
 
   // Add a child of this object.
   void AddChild(BrowserAccessibility* child);
@@ skipping 110 matching lines @@
   const string16& name() const { return name_; }
   int32 renderer_id() const { return renderer_id_; }
   int32 role() const { return role_; }
   const string16& role_name() const { return role_name_; }
   int32 state() const { return state_; }
   const string16& value() const { return value_; }
   bool instance_active() const { return instance_active_; }
   int32 ref_count() const { return ref_count_; }
 
 #if defined(OS_MACOSX) && __OBJC__
-  BrowserAccessibilityCocoa* toBrowserAccessibilityCocoa();
+  BrowserAccessibilityCocoa* ToBrowserAccessibilityCocoa();
 #elif defined(OS_WIN)
-  BrowserAccessibilityWin* toBrowserAccessibilityWin();
+  BrowserAccessibilityWin* ToBrowserAccessibilityWin();
+#elif defined(TOOLKIT_GTK)
+  BrowserAccessibilityGtk* ToBrowserAccessibilityGtk();
 #endif
 
   // Retrieve the value of a bool attribute from the bool attribute
   // map and returns true if found.
   bool GetBoolAttribute(WebAccessibility::BoolAttribute attr, bool* value)
       const;
 
   // Retrieve the value of a float attribute from the float attribute
   // map and returns true if found.
   bool GetFloatAttribute(WebAccessibility::FloatAttribute attr, float* value)
@@ skipping 91 matching lines @@
   // tree, a client may still be holding onto a pointer to this object, so
   // we mark it as inactive so that calls to any of this object's methods
   // immediately return failure.
   bool instance_active_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(BrowserAccessibility);
 };
 
 #endif  // CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_H_