chrome/browser/accessibility/browser_accessibility_mac.mm

   1 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #import <Cocoa/Cocoa.h>
   6
   7 #import "chrome/browser/accessibility/browser_accessibility_mac.h"
   8
   9 #import "chrome/browser/accessibility/browser_accessibility_cocoa.h"
  10 #import "chrome/browser/accessibility/browser_accessibility_delegate_mac.h"
  11 #include "chrome/browser/accessibility/browser_accessibility_manager.h"
  12 #import "chrome/browser/renderer_host/render_widget_host_view_mac.h"
  13
  14
  15 // Static.
  16 BrowserAccessibility* BrowserAccessibility::Create() {
  17   return new BrowserAccessibilityMac();
  18 }
  19
  20 BrowserAccessibilityMac::BrowserAccessibilityMac()
  21     : browser_accessibility_cocoa_(NULL) {
  22 }
  23
  24 void BrowserAccessibilityMac::Initialize() {
  25   if (browser_accessibility_cocoa_)
  26     return;
  27
  28   // We take ownership of the cocoa obj here.
  29   browser_accessibility_cocoa_ = [[BrowserAccessibilityCocoa alloc]
  30       initWithObject:this
  31       delegate:(RenderWidgetHostViewCocoa*)manager_->GetParentView()];
  32 }
  33
  34 void BrowserAccessibilityMac::ReleaseReference() {
  35   if (browser_accessibility_cocoa_) {
  36     BrowserAccessibilityCocoa* temp = browser_accessibility_cocoa_;
  37     browser_accessibility_cocoa_ = nil;
  38     // Relinquish ownership of the cocoa obj.
  39     [temp release];
  40     // At this point, other processes may have a reference to
  41     // the cocoa object. When the retain count hits zero, it will
  42     // destroy us in dealloc.
  43     // For that reason, do *not* make any more calls here after
  44     // as we might have been deleted.
  45   }
  46 }
  47
  48 BrowserAccessibilityCocoa* BrowserAccessibility::toBrowserAccessibilityCocoa() {
  49   return static_cast<BrowserAccessibilityMac*>(this)->
  50       native_view();
  51 }