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/browser/renderer_host/render_widget_host_view_base.h"
  13 #include "content/common/view_message_enums.h"
  14 #include "content/public/browser/web_contents.h"
  15 #include "content/public/common/url_constants.h"
  16 #include "content/public/test/test_utils.h"
  17 #include "content/shell/browser/shell.h"
  18 #include "ui/accessibility/ax_node.h"
  19
  20 namespace content {
  21
  22 AccessibilityNotificationWaiter::AccessibilityNotificationWaiter(Shell* shell)
  23     : shell_(shell),
  24       event_to_wait_for_(ui::AX_EVENT_NONE),
  25       loop_runner_(new MessageLoopRunner()),
  26       weak_factory_(this),
  27       event_target_id_(0) {
  28   WebContents* web_contents = shell_->web_contents();
  29   view_host_ = static_cast<RenderViewHostImpl*>(
  30       web_contents->GetRenderViewHost());
  31   view_host_->SetAccessibilityCallbackForTesting(
  32       base::Bind(&AccessibilityNotificationWaiter::OnAccessibilityEvent,
  33                  weak_factory_.GetWeakPtr()));
  34 }
  35
  36 AccessibilityNotificationWaiter::AccessibilityNotificationWaiter(
  37     Shell* shell,
  38     AccessibilityMode accessibility_mode,
  39     ui::AXEvent event_type)
  40     : shell_(shell),
  41       event_to_wait_for_(event_type),
  42       loop_runner_(new MessageLoopRunner()),
  43       weak_factory_(this),
  44       event_target_id_(0) {
  45   WebContents* web_contents = shell_->web_contents();
  46   view_host_ = static_cast<RenderViewHostImpl*>(
  47       web_contents->GetRenderViewHost());
  48   view_host_->SetAccessibilityCallbackForTesting(
  49       base::Bind(&AccessibilityNotificationWaiter::OnAccessibilityEvent,
  50                  weak_factory_.GetWeakPtr()));
  51   view_host_->AddAccessibilityMode(accessibility_mode);
  52 }
  53
  54 AccessibilityNotificationWaiter::~AccessibilityNotificationWaiter() {
  55 }
  56
  57 void AccessibilityNotificationWaiter::WaitForNotification() {
  58   loop_runner_->Run();
  59 }
  60
  61 const ui::AXTree& AccessibilityNotificationWaiter::GetAXTree() const {
  62   return view_host_->ax_tree_for_testing();
  63 }
  64
  65 void AccessibilityNotificationWaiter::OnAccessibilityEvent(
  66     ui::AXEvent event_type, int event_target_id) {
  67   if (!IsAboutBlank() && (event_to_wait_for_ == ui::AX_EVENT_NONE ||
  68                           event_to_wait_for_ == event_type)) {
  69     event_target_id_ = event_target_id;
  70     loop_runner_->Quit();
  71   }
  72 }
  73
  74 bool AccessibilityNotificationWaiter::IsAboutBlank() {
  75   // Skip any accessibility notifications related to "about:blank",
  76   // to avoid a possible race condition between the test beginning
  77   // listening for accessibility events and "about:blank" loading.
  78   const ui::AXNodeData& root = GetAXTree().GetRoot()->data();
  79   for (size_t i = 0; i < root.string_attributes.size(); ++i) {
  80     if (root.string_attributes[i].first != ui::AX_ATTR_DOC_URL)
  81       continue;
  82     const std::string& doc_url = root.string_attributes[i].second;
  83     return doc_url == kAboutBlankURL;
  84   }
  85   return false;
  86 }
  87
  88 }  // namespace content