Fix touch accessibility events in WebViews and iframes

chrome/browser/apps/guest_view/web_view_browsertest.cc

 // 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 <queue>
 #include <set>
 #include <utility>
 
 #include "base/callback_helpers.h"
 #include "base/files/file_util.h"
@@ skipping 27 matching lines @@
 #include "chrome/browser/task_management/task_manager_browsertest_util.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_dialogs.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "components/content_settings/core/browser/host_content_settings_map.h"
 #include "components/guest_view/browser/guest_view_manager.h"
 #include "components/guest_view/browser/guest_view_manager_delegate.h"
 #include "components/guest_view/browser/guest_view_manager_factory.h"
 #include "components/guest_view/browser/test_guest_view_manager.h"
+#include "content/public/browser/ax_event_notification_details.h"
 #include "content/public/browser/gpu_data_manager.h"
 #include "content/public/browser/interstitial_page.h"
 #include "content/public/browser/interstitial_page_delegate.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_widget_host.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/browser/web_contents_delegate.h"
 #include "content/public/common/browser_plugin_guest_mode.h"
 #include "content/public/common/child_process_host.h"
@@ skipping 3047 matching lines @@
     content::WaitForAccessibilityFocusChange();
   }
 
   // Ensure that we hit the button inside the guest frame labeled
   // "Guest button".
   ui::AXNodeData node_data =
       content::GetFocusedAccessibilityNodeInfo(web_contents);
   EXPECT_EQ("Guest button", node_data.GetStringAttribute(ui::AX_ATTR_NAME));
 }
 
+class WebContentsAccessibilityEventWatcher
+    : public content::WebContentsObserver {
+ public:
+  WebContentsAccessibilityEventWatcher(
+      content::WebContents* web_contents,
+      ui::AXEvent event)
+      : content::WebContentsObserver(web_contents),
+        event_(event),
+        count_(0) {}
+  ~WebContentsAccessibilityEventWatcher() override {}
+
+  void Wait() {
+    if (count_ == 0) {
+      loop_runner_ = new content::MessageLoopRunner();
+      loop_runner_->Run();
+    }
+  }
+
+  void AccessibilityEventReceived(
+      const std::vector<content::AXEventNotificationDetails>& details_vector)
+          override {
+    for (auto& details : details_vector) {
+      if (details.event_type == event_ && details.update.nodes.size() > 0) {
+        count_++;
+        node_data_ = details.update.nodes[0];
+        loop_runner_->Quit();
+      }
+    }
+  }
+
+  size_t count() const { return count_; }
+
+  const ui::AXNodeData& node_data() const { return node_data_; }
+
+ private:
+  scoped_refptr<content::MessageLoopRunner> loop_runner_;
+  ui::AXEvent event_;
+  ui::AXNodeData node_data_;
+  size_t count_;
+};
+
+IN_PROC_BROWSER_TEST_P(WebViewAccessibilityTest, TouchAccessibility) {
+  LoadAppWithGuest("web_view/touch_accessibility");
+  content::WebContents* web_contents = GetFirstAppWindowWebContents();
+  content::EnableAccessibilityForWebContents(web_contents);
+  content::WebContents* guest_web_contents = GetGuestWebContents();
+  content::EnableAccessibilityForWebContents(guest_web_contents);
+
+  // Listen for accessibility events on both WebContents.
+  WebContentsAccessibilityEventWatcher main_event_watcher(
+      web_contents, ui::AX_EVENT_HOVER);
+  WebContentsAccessibilityEventWatcher guest_event_watcher(
+      guest_web_contents, ui::AX_EVENT_HOVER);
+
+  // Send an accessibility touch event to the main WebContents, but
+  // positioned on top of the button inside the inner WebView.
+  blink::WebMouseEvent accessibility_touch_event;
+  accessibility_touch_event.type = blink::WebInputEvent::MouseMove;
+  accessibility_touch_event.x = 95;
+  accessibility_touch_event.y = 55;
+  accessibility_touch_event.modifiers =
+      blink::WebInputEvent::IsTouchAccessibility;
+  web_contents->GetRenderViewHost()->GetWidget()->ForwardMouseEvent(
+      accessibility_touch_event);
+
+  // Ensure that we got just a single hover event on the guest WebContents,
+  // and that it was fired on a button.
+  guest_event_watcher.Wait();
+  ui::AXNodeData hit_node = guest_event_watcher.node_data();
+  EXPECT_EQ(1U, guest_event_watcher.count());
+  EXPECT_EQ(ui::AX_ROLE_BUTTON, hit_node.role);
+  EXPECT_EQ(0U, main_event_watcher.count());
+}
+
 class WebViewGuestScrollTest
     : public WebViewTestBase,
       public testing::WithParamInterface<testing::tuple<bool, bool>> {
  protected:
   WebViewGuestScrollTest() {}
   ~WebViewGuestScrollTest() {}
 
   void SetUpCommandLine(base::CommandLine* command_line) override {
     WebViewTestBase::SetUpCommandLine(command_line);
 
@@ skipping 303 matching lines @@
   gfx::Point embedder_origin =
       GetEmbedderWebContents()->GetContainerBounds().origin();
   guest_rect.Offset(-embedder_origin.x(), -embedder_origin.y());
 
   // Generate and send synthetic touch event.
   content::SimulateTouchPressAt(GetEmbedderWebContents(),
                                 guest_rect.CenterPoint());
   EXPECT_TRUE(aura_webview->HasFocus());
 }
 #endif