blob: 52e2b1863c9fb5f0ab5e23ec6bf80d72c181ac68 [file] [log] [blame]
// Copyright 2013 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.
#include "base/memory/weak_ptr.h"
#include "content/common/accessibility_mode_enums.h"
#include "ui/accessibility/ax_node_data.h"
#include "ui/accessibility/ax_tree.h"
namespace content {
class MessageLoopRunner;
class RenderFrameHostImpl;
class Shell;
// Create an instance of this class *before* doing any operation that
// might generate an accessibility event (like a page navigation or
// clicking on a button). Then call WaitForNotification
// afterwards to block until the specified accessibility notification has been
// received.
class AccessibilityNotificationWaiter {
explicit AccessibilityNotificationWaiter(Shell* shell);
Shell* shell,
AccessibilityMode accessibility_mode,
ui::AXEvent event);
RenderFrameHostImpl* frame_host,
ui::AXEvent event);
// Blocks until the specific accessibility notification registered in
// AccessibilityNotificationWaiter is received. Ignores notifications for
// "about:blank".
void WaitForNotification();
// After WaitForNotification has returned, this will retrieve
// the tree of accessibility nodes received from the renderer process.
const ui::AXTree& GetAXTree() const;
// After WaitForNotification returns, use this to retrieve the id of the
// node that was the target of the event.
int event_target_id() { return event_target_id_; }
// Callback from RenderViewHostImpl.
void OnAccessibilityEvent(ui::AXEvent event, int event_target_id);
// Helper function to determine if the accessibility tree in
// GetAXTree() is about the page with the url "about:blank".
bool IsAboutBlank();
RenderFrameHostImpl* frame_host_;
ui::AXEvent event_to_wait_for_;
scoped_refptr<MessageLoopRunner> loop_runner_;
int event_target_id_;
base::WeakPtrFactory<AccessibilityNotificationWaiter> weak_factory_;
} // namespace content