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      1 // Copyright (c) 2012 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/renderer/render_view_mouse_lock_dispatcher.h"
      6 
      7 #include "content/common/view_messages.h"
      8 #include "content/renderer/render_view_impl.h"
      9 #include "third_party/WebKit/public/web/WebFrame.h"
     10 #include "third_party/WebKit/public/web/WebUserGestureIndicator.h"
     11 #include "third_party/WebKit/public/web/WebView.h"
     12 #include "third_party/WebKit/public/web/WebWidget.h"
     13 
     14 using blink::WebUserGestureIndicator;
     15 
     16 namespace content {
     17 
     18 RenderViewMouseLockDispatcher::RenderViewMouseLockDispatcher(
     19     RenderViewImpl* render_view_impl)
     20     : RenderViewObserver(render_view_impl),
     21       render_view_impl_(render_view_impl) {
     22 }
     23 
     24 RenderViewMouseLockDispatcher::~RenderViewMouseLockDispatcher() {
     25 }
     26 
     27 void RenderViewMouseLockDispatcher::SendLockMouseRequest(
     28     bool unlocked_by_target) {
     29   bool user_gesture = WebUserGestureIndicator::isProcessingUserGesture();
     30 
     31   Send(new ViewHostMsg_LockMouse(routing_id(), user_gesture, unlocked_by_target,
     32                                  false));
     33 }
     34 
     35 void RenderViewMouseLockDispatcher::SendUnlockMouseRequest() {
     36   Send(new ViewHostMsg_UnlockMouse(routing_id()));
     37 }
     38 
     39 bool RenderViewMouseLockDispatcher::OnMessageReceived(
     40     const IPC::Message& message) {
     41   bool handled = true;
     42   IPC_BEGIN_MESSAGE_MAP(RenderViewMouseLockDispatcher, message)
     43     IPC_MESSAGE_HANDLER(ViewMsg_LockMouse_ACK, OnLockMouseACK)
     44     IPC_MESSAGE_FORWARD(ViewMsg_MouseLockLost,
     45                         static_cast<MouseLockDispatcher*>(this),
     46                         MouseLockDispatcher::OnMouseLockLost)
     47     IPC_MESSAGE_UNHANDLED(handled = false)
     48   IPC_END_MESSAGE_MAP()
     49   return handled;
     50 }
     51 
     52 void RenderViewMouseLockDispatcher::OnLockMouseACK(bool succeeded) {
     53   // Notify the base class.
     54   MouseLockDispatcher::OnLockMouseACK(succeeded);
     55 
     56   // Mouse Lock removes the system cursor and provides all mouse motion as
     57   // .movementX/Y values on events all sent to a fixed target. This requires
     58   // content to specifically request the mode to be entered.
     59   // Mouse Capture is implicitly given for the duration of a drag event, and
     60   // sends all mouse events to the initial target of the drag.
     61   // If Lock is entered it supercedes any in progress Capture.
     62   if (succeeded && render_view_impl_->webwidget())
     63     render_view_impl_->webwidget()->mouseCaptureLost();
     64 }
     65 
     66 }  // namespace content
     67