[DevTools] Touch emulation in content.

content/browser/renderer_host/render_widget_host_impl.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_impl.h"
 
 #include <math.h>
 #include <set>
 #include <utility>
 
@@ skipping 20 matching lines @@
 #include "content/browser/gpu/gpu_process_host_ui_shim.h"
 #include "content/browser/gpu/gpu_surface_tracker.h"
 #include "content/browser/renderer_host/backing_store.h"
 #include "content/browser/renderer_host/backing_store_manager.h"
 #include "content/browser/renderer_host/dip_util.h"
 #include "content/browser/renderer_host/input/input_router_impl.h"
 #include "content/browser/renderer_host/input/synthetic_gesture.h"
 #include "content/browser/renderer_host/input/synthetic_gesture_controller.h"
 #include "content/browser/renderer_host/input/synthetic_gesture_target.h"
 #include "content/browser/renderer_host/input/timeout_monitor.h"
+#include "content/browser/renderer_host/input/touch_emulator.h"
 #include "content/browser/renderer_host/overscroll_controller.h"
 #include "content/browser/renderer_host/render_process_host_impl.h"
 #include "content/browser/renderer_host/render_view_host_impl.h"
 #include "content/browser/renderer_host/render_widget_helper.h"
 #include "content/browser/renderer_host/render_widget_host_delegate.h"
 #include "content/common/accessibility_messages.h"
 #include "content/common/content_constants_internal.h"
 #include "content/common/cursors/webcursor.h"
 #include "content/common/gpu/gpu_messages.h"
 #include "content/common/input_messages.h"
@@ skipping 181 matching lines @@
   // If we're initially visible, tell the process host that we're alive.
   // Otherwise we'll notify the process host when we are first shown.
   if (!hidden)
     process_->WidgetRestored();
 
   accessibility_mode_ =
       BrowserAccessibilityStateImpl::GetInstance()->accessibility_mode();
 
   input_router_.reset(new InputRouterImpl(process_, this, this, routing_id_));
 
+  touch_emulator_.reset();
+
 #if defined(USE_AURA)
   bool overscroll_enabled = CommandLine::ForCurrentProcess()->
       GetSwitchValueASCII(switches::kOverscrollHistoryNavigation) != "0";
   SetOverscrollControllerEnabled(overscroll_enabled);
 #endif
 
   if (GetProcess()->IsGuest() || !CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kDisableHangMonitor)) {
     hang_monitor_timeout_.reset(new TimeoutMonitor(
         base::Bind(&RenderWidgetHostImpl::RendererIsUnresponsive,
@@ skipping 220 matching lines @@
     IPC_MESSAGE_HANDLER(ViewHostMsg_SetTooltipText, OnSetTooltipText)
     IPC_MESSAGE_HANDLER_GENERIC(ViewHostMsg_SwapCompositorFrame,
                                 msg_is_ok = OnSwapCompositorFrame(msg))
     IPC_MESSAGE_HANDLER(ViewHostMsg_DidOverscroll, OnOverscrolled)
     IPC_MESSAGE_HANDLER(ViewHostMsg_DidStopFlinging, OnFlingingStopped)
     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateRect, OnUpdateRect)
     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateIsDelayed, OnUpdateIsDelayed)
     IPC_MESSAGE_HANDLER(ViewHostMsg_Focus, OnFocus)
     IPC_MESSAGE_HANDLER(ViewHostMsg_Blur, OnBlur)
     IPC_MESSAGE_HANDLER(ViewHostMsg_SetCursor, OnSetCursor)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_SetTouchEventEmulationEnabled,
+                        OnSetTouchEventEmulationEnabled)
     IPC_MESSAGE_HANDLER(ViewHostMsg_TextInputTypeChanged,
                         OnTextInputTypeChanged)
     IPC_MESSAGE_HANDLER(ViewHostMsg_ImeCancelComposition,
                         OnImeCancelComposition)
     IPC_MESSAGE_HANDLER(ViewHostMsg_DidActivateAcceleratedCompositing,
                         OnDidActivateAcceleratedCompositing)
     IPC_MESSAGE_HANDLER(ViewHostMsg_LockMouse, OnLockMouse)
     IPC_MESSAGE_HANDLER(ViewHostMsg_UnlockMouse, OnUnlockMouse)
     IPC_MESSAGE_HANDLER(ViewHostMsg_ShowDisambiguationPopup,
                         OnShowDisambiguationPopup)
@@ skipping 178 matching lines @@
   // If there is a pending mouse lock request, we don't want to reject it at
   // this point. The user can switch focus back to this view and approve the
   // request later.
   if (IsMouseLocked())
     view_->UnlockMouse();
 
   // If there is a pending overscroll, then that should be cancelled.
   if (overscroll_controller_)
     overscroll_controller_->Cancel();
 
+  if (touch_emulator_)
+    touch_emulator_->CancelTouch();
+
   Send(new InputMsg_SetFocus(routing_id_, false));
 }
 
 void RenderWidgetHostImpl::LostCapture() {
+  if (touch_emulator_)
+    touch_emulator_->CancelTouch();
+
   Send(new InputMsg_MouseCaptureLost(routing_id_));
 }
 
 void RenderWidgetHostImpl::SetActive(bool active) {
   Send(new ViewMsg_SetActive(routing_id_, active));
 }
 
 void RenderWidgetHostImpl::LostMouseLock() {
   Send(new ViewMsg_MouseLockLost(routing_id_));
 }
@@ skipping 283 matching lines @@
       CreateRWHLatencyInfoIfNotExist(&ui_latency, mouse_event.type);
 
   for (size_t i = 0; i < mouse_event_callbacks_.size(); ++i) {
     if (mouse_event_callbacks_[i].Run(mouse_event))
       return;
   }
 
   if (IgnoreInputEvents())
     return;
 
+  if (touch_emulator_ && touch_emulator_->HandleMouseEvent(mouse_event))
+    return;
+
   input_router_->SendMouseEvent(MouseEventWithLatencyInfo(mouse_event,
                                                           latency_info));
 }
 
 void RenderWidgetHostImpl::OnPointerEventActivate() {
 }
 
 void RenderWidgetHostImpl::ForwardWheelEvent(
     const WebMouseWheelEvent& wheel_event) {
   ForwardWheelEventWithLatencyInfo(wheel_event, ui::LatencyInfo());
 }
 
 void RenderWidgetHostImpl::ForwardWheelEventWithLatencyInfo(
       const blink::WebMouseWheelEvent& wheel_event,
       const ui::LatencyInfo& ui_latency) {
   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardWheelEvent");
 
   ui::LatencyInfo latency_info =
       CreateRWHLatencyInfoIfNotExist(&ui_latency, wheel_event.type);
 
   if (IgnoreInputEvents())
     return;
 
+  if (touch_emulator_ && touch_emulator_->HandleMouseWheelEvent(wheel_event))
+    return;
+
   input_router_->SendWheelEvent(MouseWheelEventWithLatencyInfo(wheel_event,
                                                                latency_info));
 }
 
 void RenderWidgetHostImpl::ForwardGestureEvent(
     const blink::WebGestureEvent& gesture_event) {
   ForwardGestureEventWithLatencyInfo(gesture_event, ui::LatencyInfo());
 }
 
 void RenderWidgetHostImpl::ForwardGestureEventWithLatencyInfo(
@@ skipping 29 matching lines @@
           original_component.sequence_number,
           original_component.event_time,
           original_component.event_count);
     }
   }
 
   GestureEventWithLatencyInfo gesture_with_latency(gesture_event, latency_info);
   input_router_->SendGestureEvent(gesture_with_latency);
 }
 
+void RenderWidgetHostImpl::ForwardTouchEvent(
+      const blink::WebTouchEvent& touch_event) {
+  ForwardTouchEventWithLatencyInfo(touch_event, ui::LatencyInfo());
+}
+
 void RenderWidgetHostImpl::ForwardTouchEventWithLatencyInfo(
       const blink::WebTouchEvent& touch_event,
       const ui::LatencyInfo& ui_latency) {
   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardTouchEvent");
 
   // Always forward TouchEvents for touch stream consistency. They will be
   // ignored if appropriate in FilterInputEvent().
 
   ui::LatencyInfo latency_info =
       CreateRWHLatencyInfoIfNotExist(&ui_latency, touch_event.type);
@@ skipping 55 matching lines @@
 
     // Tab switching/closing accelerators aren't sent to the renderer to avoid
     // a hung/malicious renderer from interfering.
     if (delegate_->PreHandleKeyboardEvent(key_event, &is_shortcut))
       return;
 
     if (key_event.type == WebKeyboardEvent::RawKeyDown)
       suppress_next_char_events_ = false;
   }
 
+  if (touch_emulator_ && touch_emulator_->HandleKeyboardEvent(key_event))
+    return;
+
   input_router_->SendKeyboardEvent(
       key_event,
       CreateRWHLatencyInfoIfNotExist(NULL, key_event.type),
       is_shortcut);
 }
 
 void RenderWidgetHostImpl::QueueSyntheticGesture(
     scoped_ptr<SyntheticGesture> synthetic_gesture,
     const base::Callback<void(SyntheticGesture::Result)>& on_complete) {
   if (!synthetic_gesture_controller_ && view_) {
     synthetic_gesture_controller_.reset(
         new SyntheticGestureController(
             view_->CreateSyntheticGestureTarget().Pass()));
   }
   if (synthetic_gesture_controller_) {
     synthetic_gesture_controller_->QueueSyntheticGesture(
         synthetic_gesture.Pass(), on_complete);
   }
 }
 
+void RenderWidgetHostImpl::SetCursor(const WebCursor& cursor) {
+  if (!view_)
+    return;
+  view_->UpdateCursor(cursor);
+}
+
 void RenderWidgetHostImpl::SendCursorVisibilityState(bool is_visible) {
   Send(new InputMsg_CursorVisibilityChange(GetRoutingID(), is_visible));
 }
 
 int64 RenderWidgetHostImpl::GetLatencyComponentId() {
   return GetRoutingID() | (static_cast<int64>(GetProcess()->GetID()) << 32);
 }
 
 // static
 void RenderWidgetHostImpl::DisableResizeAckCheckForTesting() {
@@ skipping 644 matching lines @@
   GetProcess()->ReceivedBadMessage();
 }
 
 void RenderWidgetHostImpl::OnBlur() {
   // Only RenderViewHost can deal with that message.
   RecordAction(base::UserMetricsAction("BadMessageTerminate_RWH5"));
   GetProcess()->ReceivedBadMessage();
 }
 
 void RenderWidgetHostImpl::OnSetCursor(const WebCursor& cursor) {
-  if (!view_) {
-    return;
+  SetCursor(cursor);
+}
+
+void RenderWidgetHostImpl::OnSetTouchEventEmulationEnabled(
+    bool enabled, bool allow_pinch) {
+  if (enabled) {
+    if (!touch_emulator_)
+      touch_emulator_.reset(new TouchEmulator(this));
+    touch_emulator_->Enable(allow_pinch);
+  } else {
+    if (touch_emulator_)
+      touch_emulator_->Disable();
   }
-  view_->UpdateCursor(cursor);
 }
 
 void RenderWidgetHostImpl::OnTextInputTypeChanged(
     ui::TextInputType type,
     ui::TextInputMode input_mode,
     bool can_compose_inline) {
   if (view_)
     view_->TextInputTypeChanged(type, input_mode, can_compose_inline);
 }
 
@@ skipping 317 matching lines @@
   TouchEventWithLatencyInfo touch_event = event;
   touch_event.latency.AddLatencyNumber(
       ui::INPUT_EVENT_LATENCY_ACKED_TOUCH_COMPONENT, 0, 0);
   // TouchEvent latency ends at ack if it didn't cause any rendering.
   if (!touch_event.latency.FindLatency(
           ui::INPUT_EVENT_LATENCY_RENDERING_SCHEDULED_COMPONENT, 0, NULL)) {
     touch_event.latency.AddLatencyNumber(
         ui::INPUT_EVENT_LATENCY_TERMINATED_TOUCH_COMPONENT, 0, 0);
   }
   ComputeTouchLatency(touch_event.latency);
+
+  if (touch_emulator_ && touch_emulator_->HandleTouchEventAck(ack_result))
+    return;
+
   if (view_)
     view_->ProcessAckedTouchEvent(touch_event, ack_result);
 }
 
 void RenderWidgetHostImpl::OnUnexpectedEventAck(UnexpectedEventAckType type) {
   if (type == BAD_ACK_MESSAGE) {
     RecordAction(base::UserMetricsAction("BadMessageTerminate_RWH2"));
     process_->ReceivedBadMessage();
   } else if (type == UNEXPECTED_EVENT_TYPE) {
     suppress_next_char_events_ = false;
@@ skipping 377 matching lines @@
   }
 }
 
 SkBitmap::Config RenderWidgetHostImpl::PreferredReadbackFormat() {
   if (view_)
     return view_->PreferredReadbackFormat();
   return SkBitmap::kARGB_8888_Config;
 }
 
 }  // namespace content