Implement Gesture event hit testing/forwarding for OOPIF.

content/browser/renderer_host/render_widget_host_view_aura.cc

 // Copyright (c) 2012 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 "content/browser/renderer_host/render_widget_host_view_aura.h"
 
 #include <set>
 #include <utility>
 
 #include "base/auto_reset.h"
@@ skipping 463 matching lines @@
       cursor_visibility_state_in_renderer_(UNKNOWN),
 #if defined(OS_WIN)
       legacy_render_widget_host_HWND_(NULL),
       legacy_window_destroyed_(false),
 #endif
       has_snapped_to_boundary_(false),
       is_guest_view_hack_(is_guest_view_hack),
       begin_frame_observer_proxy_(this),
       set_focus_on_mouse_down_or_key_event_(false),
       device_scale_factor_(0.0f),
+      disable_input_event_router_for_testing_(false),
       weak_ptr_factory_(this) {
   if (!is_guest_view_hack_)
     host_->SetView(this);
 
   // Let the page-level input event router know about our surface ID
   // namespace for surface-based hit testing.
   if (host_->delegate() && host_->delegate()->GetInputEventRouter()) {
     host_->delegate()->GetInputEventRouter()->AddSurfaceIdNamespaceOwner(
         GetSurfaceIdNamespace(), this);
   }
@@ skipping 368 matching lines @@
   // We should route an event in two cases:
   // 1) Mouse events are routed only if cross-process frames are possible.
   // 2) Touch events are always routed. In the absence of a BrowserPlugin
   //    we expect the routing to always send the event to this view. If
   //    one or more BrowserPlugins are present, then the event may be targeted
   //    to one of them, or this view. This allows GuestViews to have access to
   //    them while still forcing pinch-zoom to be handled by the top-level
   //    frame. TODO(wjmaclean): At present, this doesn't work for OOPIF, but
   //    it should be a simple extension to modify RenderWidgetHostViewChildFrame
   //    in a similar manner to RenderWidgetHostViewGuest.
-  bool result = host_->delegate() && host_->delegate()->GetInputEventRouter();
+  bool result = host_->delegate() && host_->delegate()->GetInputEventRouter() &&
+                !disable_input_event_router_for_testing_;
   if (event->IsMouseEvent())
     result = result && SiteIsolationPolicy::AreCrossProcessFramesPossible();
   return result;
 }
 
 void RenderWidgetHostViewAura::HandleParentBoundsChanged() {
   SnapToPhysicalPixelBoundary();
 #if defined(OS_WIN)
   if (legacy_render_widget_host_HWND_) {
     legacy_render_widget_host_HWND_->SetBounds(
@@ skipping 1370 matching lines @@
     const blink::WebMouseWheelEvent& event) {
   host_->ForwardWheelEvent(event);
 }
 
 void RenderWidgetHostViewAura::ProcessTouchEvent(
     const blink::WebTouchEvent& event,
     const ui::LatencyInfo& latency) {
   host_->ForwardTouchEventWithLatencyInfo(event, latency);
 }
 
+void RenderWidgetHostViewAura::ProcessGestureEvent(
+    const blink::WebGestureEvent& event,
+    const ui::LatencyInfo& latency) {
+  host_->ForwardGestureEventWithLatencyInfo(event, latency);
+}
+
 void RenderWidgetHostViewAura::TransformPointToLocalCoordSpace(
     const gfx::Point& point,
     cc::SurfaceId original_surface,
     gfx::Point* transformed_point) {
   delegated_frame_host_->TransformPointToLocalCoordSpace(
       point, original_surface, transformed_point);
 }
 
 void RenderWidgetHostViewAura::OnScrollEvent(ui::ScrollEvent* event) {
   TRACE_EVENT0("input", "RenderWidgetHostViewAura::OnScrollEvent");
@@ skipping 88 matching lines @@
   if (event->type() == ui::ET_GESTURE_TAP)
     FinishImeCompositionSession();
 
   blink::WebGestureEvent gesture = MakeWebGestureEvent(*event);
   if (event->type() == ui::ET_GESTURE_TAP_DOWN) {
     // Webkit does not stop a fling-scroll on tap-down. So explicitly send an
     // event to stop any in-progress flings.
     blink::WebGestureEvent fling_cancel = gesture;
     fling_cancel.type = blink::WebInputEvent::GestureFlingCancel;
     fling_cancel.sourceDevice = blink::WebGestureDeviceTouchscreen;
-    host_->ForwardGestureEvent(fling_cancel);
+    if (ShouldRouteEvent(event)) {
+      host_->delegate()->GetInputEventRouter()->RouteGestureEvent(
+          this, &fling_cancel, ui::LatencyInfo());
+    } else {
+      host_->ForwardGestureEvent(fling_cancel);
+    }
   }
 
   if (gesture.type != blink::WebInputEvent::Undefined) {
-    host_->ForwardGestureEventWithLatencyInfo(gesture, *event->latency());
+    if (ShouldRouteEvent(event)) {
+      host_->delegate()->GetInputEventRouter()->RouteGestureEvent(
+          this, &gesture, *event->latency());
+    } else {
+      host_->ForwardGestureEventWithLatencyInfo(gesture, *event->latency());
+    }
 
     if (event->type() == ui::ET_GESTURE_SCROLL_BEGIN ||
         event->type() == ui::ET_GESTURE_SCROLL_UPDATE ||
         event->type() == ui::ET_GESTURE_SCROLL_END) {
       RecordAction(base::UserMetricsAction("TouchscreenScroll"));
     } else if (event->type() == ui::ET_SCROLL_FLING_START) {
       RecordAction(base::UserMetricsAction("TouchscreenScrollFling"));
     }
   }
 
@@ skipping 345 matching lines @@
     return false;
   }
 #endif
   return true;
 }
 
 void RenderWidgetHostViewAura::SetSelectionControllerClientForTest(
     scoped_ptr<TouchSelectionControllerClientAura> client) {
   selection_controller_client_.swap(client);
   CreateSelectionController();
+  disable_input_event_router_for_testing_ = true;
 }
 
 void RenderWidgetHostViewAura::InternalSetBounds(const gfx::Rect& rect) {
   SnapToPhysicalPixelBoundary();
   // Don't recursively call SetBounds if this bounds update is the result of
   // a Window::SetBoundsInternal call.
   if (!in_bounds_changed_)
     window_->SetBounds(rect);
   host_->WasResized();
   delegated_frame_host_->WasResized();
@@ skipping 359 matching lines @@
 
 ////////////////////////////////////////////////////////////////////////////////
 // RenderWidgetHostViewBase, public:
 
 // static
 void RenderWidgetHostViewBase::GetDefaultScreenInfo(WebScreenInfo* results) {
   GetScreenInfoForWindow(results, NULL);
 }
 
 }  // namespace content