1 // Copyright 2013 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 #ifndef CONTENT_TEST_ACCESSIBILITY_BROWSER_TEST_UTILS_H_ 6 #define CONTENT_TEST_ACCESSIBILITY_BROWSER_TEST_UTILS_H_ 7 8 #include "base/memory/weak_ptr.h" 9 #include "content/common/accessibility_node_data.h" 10 #include "content/common/accessibility_notification.h" 11 #include "content/common/view_message_enums.h" 12 13 namespace content { 14 15 class MessageLoopRunner; 16 class RenderViewHostImpl; 17 class Shell; 18 19 // Create an instance of this class *before* doing any operation that 20 // might generate an accessibility event (like a page navigation or 21 // clicking on a button). Then call WaitForNotification 22 // afterwards to block until the specified accessibility notification has been 23 // received. 24 class AccessibilityNotificationWaiter { 25 public: 26 AccessibilityNotificationWaiter( 27 Shell* shell, 28 AccessibilityMode accessibility_mode, 29 AccessibilityNotification notification); 30 ~AccessibilityNotificationWaiter(); 31 32 // Blocks until the specific accessibility notification registered in 33 // AccessibilityNotificationWaiter is received. Ignores notifications for 34 // "about:blank". 35 void WaitForNotification(); 36 37 // After WaitForNotification has returned, this will retrieve 38 // the tree of accessibility nodes received from the renderer process. 39 const AccessibilityNodeDataTreeNode& GetAccessibilityNodeDataTree() const; 40 41 private: 42 // Callback from RenderViewHostImpl. 43 void OnAccessibilityNotification(AccessibilityNotification notification); 44 45 // Helper function to determine if the accessibility tree in 46 // GetAccessibilityNodeDataTree() is about the page with the url 47 // "about:blank". 48 bool IsAboutBlank(); 49 50 Shell* shell_; 51 RenderViewHostImpl* view_host_; 52 AccessibilityNotification notification_to_wait_for_; 53 scoped_refptr<MessageLoopRunner> loop_runner_; 54 base::WeakPtrFactory<AccessibilityNotificationWaiter> weak_factory_; 55 56 DISALLOW_COPY_AND_ASSIGN(AccessibilityNotificationWaiter); 57 }; 58 59 } // namespace content 60 61 #endif // CONTENT_TEST_ACCESSIBILITY_BROWSER_TEST_UTILS_H_ 62