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 namespace content {
  14
  15 RenderViewMouseLockDispatcher::RenderViewMouseLockDispatcher(
  16     RenderViewImpl* render_view_impl)
  17     : RenderViewObserver(render_view_impl),
  18       render_view_impl_(render_view_impl) {
  19 }
  20
  21 RenderViewMouseLockDispatcher::~RenderViewMouseLockDispatcher() {
  22 }
  23
  24 void RenderViewMouseLockDispatcher::SendLockMouseRequest(
  25     bool unlocked_by_target) {
  26   bool user_gesture =
  27       render_view_impl_->webview() &&
  28       render_view_impl_->webview()->mainFrame() &&
  29       render_view_impl_->webview()->mainFrame()->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, OnMsgLockMouseACK)
  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::OnMsgLockMouseACK(bool succeeded) {
  53   // Notify the base class.
  54   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