content/test/accessibility_browser_test_utils.cc

   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 #include "content/test/accessibility_browser_test_utils.h"
   6
   7 #include "base/bind.h"
   8 #include "base/logging.h"
   9 #include "base/strings/string_util.h"
  10 #include "base/strings/utf_string_conversions.h"
  11 #include "content/browser/renderer_host/render_view_host_impl.h"
  12 #include "content/port/browser/render_widget_host_view_port.h"
  13 #include "content/public/browser/web_contents.h"
  14 #include "content/public/common/url_constants.h"
  15 #include "content/public/test/test_utils.h"
  16 #include "content/shell/browser/shell.h"
  17 #include "ui/accessibility/ax_node.h"
  18
  19 namespace content {
  20
  21 AccessibilityNotificationWaiter::AccessibilityNotificationWaiter(
  22     Shell* shell,
  23     AccessibilityMode accessibility_mode,
  24     ui::AXEvent event_type)
  25     : shell_(shell),
  26       event_to_wait_for_(event_type),
  27       loop_runner_(new MessageLoopRunner()),
  28       weak_factory_(this) {
  29   WebContents* web_contents = shell_->web_contents();
  30   view_host_ = static_cast<RenderViewHostImpl*>(
  31       web_contents->GetRenderViewHost());
  32   view_host_->SetAccessibilityCallbackForTesting(
  33       base::Bind(&AccessibilityNotificationWaiter::OnAccessibilityEvent,
  34                  weak_factory_.GetWeakPtr()));
  35   view_host_->SetAccessibilityMode(accessibility_mode);
  36 }
  37
  38 AccessibilityNotificationWaiter::~AccessibilityNotificationWaiter() {
  39 }
  40
  41 void AccessibilityNotificationWaiter::WaitForNotification() {
  42   loop_runner_->Run();
  43 }
  44
  45 const ui::AXTree& AccessibilityNotificationWaiter::GetAXTree() const {
  46   return view_host_->ax_tree_for_testing();
  47 }
  48
  49 void AccessibilityNotificationWaiter::OnAccessibilityEvent(
  50     ui::AXEvent event_type) {
  51   if (!IsAboutBlank() && event_to_wait_for_ == event_type)
  52     loop_runner_->Quit();
  53 }
  54
  55 bool AccessibilityNotificationWaiter::IsAboutBlank() {
  56   // Skip any accessibility notifications related to "about:blank",
  57   // to avoid a possible race condition between the test beginning
  58   // listening for accessibility events and "about:blank" loading.
  59   const ui::AXNodeData& root = GetAXTree().GetRoot()->data();
  60   for (size_t i = 0; i < root.string_attributes.size(); ++i) {
  61     if (root.string_attributes[i].first != ui::AX_ATTR_DOC_URL)
  62       continue;
  63     const std::string& doc_url = root.string_attributes[i].second;
  64     return doc_url == kAboutBlankURL;
  65   }
  66   return false;
  67 }
  68
  69 }  // namespace content