content/renderer/render_view_mouse_lock_dispatcher.cc

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