Implement pointer lock API for out-of-process iframes.

content/renderer/render_view_mouse_lock_dispatcher.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/renderer/render_view_mouse_lock_dispatcher.h"
-
-#include "content/common/view_messages.h"
-#include "content/renderer/render_view_impl.h"
-#include "third_party/WebKit/public/web/WebFrame.h"
-#include "third_party/WebKit/public/web/WebUserGestureIndicator.h"
-#include "third_party/WebKit/public/web/WebView.h"
-#include "third_party/WebKit/public/web/WebWidget.h"
-
-using blink::WebUserGestureIndicator;
-
-namespace content {
-
-RenderViewMouseLockDispatcher::RenderViewMouseLockDispatcher(
-    RenderViewImpl* render_view_impl)
-    : RenderViewObserver(render_view_impl),
-      render_view_impl_(render_view_impl) {
-}
-
-RenderViewMouseLockDispatcher::~RenderViewMouseLockDispatcher() {
-}
-
-void RenderViewMouseLockDispatcher::SendLockMouseRequest(
-    bool unlocked_by_target) {
-  bool user_gesture = WebUserGestureIndicator::isProcessingUserGesture();
-
-  Send(new ViewHostMsg_LockMouse(routing_id(), user_gesture, unlocked_by_target,
-                                 false));
-}
-
-void RenderViewMouseLockDispatcher::SendUnlockMouseRequest() {
-  Send(new ViewHostMsg_UnlockMouse(routing_id()));
-}
-
-bool RenderViewMouseLockDispatcher::OnMessageReceived(
-    const IPC::Message& message) {
-  bool handled = true;
-  IPC_BEGIN_MESSAGE_MAP(RenderViewMouseLockDispatcher, message)
-    IPC_MESSAGE_HANDLER(ViewMsg_LockMouse_ACK, OnLockMouseACK)
-    IPC_MESSAGE_FORWARD(ViewMsg_MouseLockLost,
-                        static_cast<MouseLockDispatcher*>(this),
-                        MouseLockDispatcher::OnMouseLockLost)
-    IPC_MESSAGE_UNHANDLED(handled = false)
-  IPC_END_MESSAGE_MAP()
-  return handled;
-}
-
-void RenderViewMouseLockDispatcher::OnDestruct() {
-  delete this;
-}
-
-void RenderViewMouseLockDispatcher::OnLockMouseACK(bool succeeded) {
-  // Notify the base class.
-  MouseLockDispatcher::OnLockMouseACK(succeeded);
-
-  // Mouse Lock removes the system cursor and provides all mouse motion as
-  // .movementX/Y values on events all sent to a fixed target. This requires
-  // content to specifically request the mode to be entered.
-  // Mouse Capture is implicitly given for the duration of a drag event, and
-  // sends all mouse events to the initial target of the drag.
-  // If Lock is entered it supercedes any in progress Capture.
-  if (succeeded && render_view_impl_->GetWidget()->webwidget())
-    render_view_impl_->GetWidget()->webwidget()->mouseCaptureLost();
-}
-
-}  // namespace content