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

content/renderer/render_widget.h

 // 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.
 
 #ifndef CONTENT_RENDERER_RENDER_WIDGET_H_
 #define CONTENT_RENDERER_RENDER_WIDGET_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <deque>
 #include <map>
 #include <memory>
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/observer_list.h"
 #include "base/time/time.h"
 #include "build/build_config.h"
 #include "content/common/content_export.h"
 #include "content/common/cursors/webcursor.h"
 #include "content/common/input/synthetic_gesture_params.h"
 #include "content/renderer/devtools/render_widget_screen_metrics_emulator_delegate.h"
 #include "content/renderer/gpu/render_widget_compositor_delegate.h"
 #include "content/renderer/input/render_widget_input_handler.h"
 #include "content/renderer/input/render_widget_input_handler_delegate.h"
 #include "content/renderer/message_delivery_policy.h"
+#include "content/renderer/mouse_lock_dispatcher.h"
+#include "content/renderer/render_widget_mouse_lock_dispatcher.h"
 #include "ipc/ipc_listener.h"
 #include "ipc/ipc_sender.h"
 #include "third_party/WebKit/public/platform/WebDisplayMode.h"
 #include "third_party/WebKit/public/platform/WebRect.h"
 #include "third_party/WebKit/public/web/WebCompositionUnderline.h"
 #include "third_party/WebKit/public/web/WebInputEvent.h"
 #include "third_party/WebKit/public/web/WebPopupType.h"
 #include "third_party/WebKit/public/web/WebTextDirection.h"
 #include "third_party/WebKit/public/web/WebTextInputInfo.h"
 #include "third_party/WebKit/public/web/WebTouchAction.h"
@@ skipping 212 matching lines @@
   void resetInputMethod() override;
   void didHandleGestureEvent(const blink::WebGestureEvent& event,
                              bool event_cancelled) override;
   void didOverscroll(const blink::WebFloatSize& overscrollDelta,
                      const blink::WebFloatSize& accumulatedOverscroll,
                      const blink::WebFloatPoint& position,
                      const blink::WebFloatSize& velocity) override;
   void showImeIfNeeded() override;
   void convertViewportToWindow(blink::WebRect* rect) override;
   void convertWindowToViewport(blink::WebFloatRect* rect) override;
+  bool requestPointerLock() override;
+  void requestPointerUnlock() override;
+  bool isPointerLocked() override;
 
   // Override point to obtain that the current input method state and caret
   // position.
   virtual ui::TextInputType GetTextInputType();
   virtual ui::TextInputType WebKitToUiTextInputType(
       blink::WebTextInputType type);
 
 #if defined(OS_ANDROID)
   // Notifies that a tap was not consumed, so showing a UI for the unhandled
   // tap may be needed.
@@ skipping 84 matching lines @@
   // handle composition range and composition character bounds.
   void UpdateCompositionInfo(bool should_update_range);
 
   // Change the device ICC color profile while running a layout test.
   void SetDeviceColorProfileForTesting(const std::vector<char>& color_profile);
   void ResetDeviceColorProfileForTesting();
 
   // Indicates whether this widget has focus.
   bool has_focus() const { return has_focus_; }
 
+  MouseLockDispatcher* mouse_lock_dispatcher() {
+    return mouse_lock_dispatcher_.get();
+  }
+
  protected:
   // Friend RefCounted so that the dtor can be non-public. Using this class
   // without ref-counting is an error.
   friend class base::RefCounted<RenderWidget>;
 
   // For unit tests.
   friend class RenderWidgetTest;
 
   enum ResizeAck {
     SEND_RESIZE_ACK,
@@ skipping 15 matching lines @@
 
   // Creates a WebWidget based on the popup type.
   static blink::WebWidget* CreateWebWidget(RenderWidget* render_widget);
 
   // Initializes this view with the given opener.
   bool Init(int32_t opener_id);
 
   // Called by Init and subclasses to perform initialization.
   bool DoInit(int32_t opener_id,
               blink::WebWidget* web_widget,
-              IPC::SyncMessage* create_widget_message);
+              IPC::SyncMessage* create_widget_message,
+              bool should_add_route);

[scheib, 2016/05/19 00:38:58]

Is this part of the mouse lock move? I didn't follow this part of the change.

[lfg, 2016/05/19 23:54:06]

It's not strictly necessary, but since I've moved the mouse_lock_dispatcher to
RenderWidget, we still need to initialize it during the RenderView
initialization. Instead of adding a new function that does the same as
RenderWidget::DoInit without adding the route, I've just added a parameter here.
I feel this is a bit cleaner.

In the future, we'd like to have RenderView be just a renderer object holding
the state of the page, and not having a RenderViewHost counterpart (so no route
anymore).

 
   // Sets whether this RenderWidget has been swapped out to be displayed by
   // a RenderWidget in a different process.  If so, no new IPC messages will be
   // sent (only ACKs) and the process is free to exit when there are no other
   // active RenderWidgets.
   void SetSwappedOut(bool is_swapped_out);
 
   // Allows the process to exit once the unload handler has finished, if there
   // are no other active RenderWidgets.
   void WasSwappedOut();
@@ skipping 338 matching lines @@
   // are sent to each frame in the list for events such as changing
   // visibility state for example.
   base::ObserverList<RenderFrameImpl> render_frames_;
 
   bool has_host_context_menu_location_;
   gfx::Point host_context_menu_location_;
 
   std::unique_ptr<scheduler::RenderWidgetSchedulingState>
       render_widget_scheduling_state_;
 
+  // Mouse Lock dispatcher attached to this view.
+  std::unique_ptr<RenderWidgetMouseLockDispatcher> mouse_lock_dispatcher_;
+
+  // Wraps the |webwidget_| as a MouseLockDispatcher::LockTarget interface.
+  std::unique_ptr<MouseLockDispatcher::LockTarget> webwidget_mouse_lock_target_;
+
  private:
   // When emulated, this returns original device scale factor.
   float GetOriginalDeviceScaleFactor() const;
 
   // Indicates whether this widget has focus.
   bool has_focus_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidget);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_WIDGET_H_