Reland of move remote tree host and some related input and metro_driver code

ui/aura/remote_window_tree_host_win.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 UI_AURA_REMOTE_WINDOW_TREE_HOST_WIN_H_
-#define UI_AURA_REMOTE_WINDOW_TREE_HOST_WIN_H_
-
-#include <stdint.h>
-
-#include <vector>
-
-#include "base/compiler_specific.h"
-#include "base/macros.h"
-#include "base/strings/string16.h"
-#include "ui/aura/window_tree_host.h"
-#include "ui/base/ime/remote_input_method_delegate_win.h"
-#include "ui/events/event.h"
-#include "ui/events/event_constants.h"
-#include "ui/events/event_source.h"
-#include "ui/gfx/native_widget_types.h"
-#include "ui/metro_viewer/ime_types.h"
-
-struct MetroViewerHostMsg_MouseButtonParams;
-
-namespace base {
-class FilePath;
-}
-
-namespace ui {
-class RemoteInputMethodPrivateWin;
-class ViewProp;
-}
-
-namespace IPC {
-class Message;
-class Sender;
-}
-
-namespace aura {
-
-// WindowTreeHost implementaton that receives events from a different
-// process. In the case of Windows this is the Windows 8 (aka Metro)
-// frontend process, which forwards input events to this class.
-class AURA_EXPORT RemoteWindowTreeHostWin
-    : public WindowTreeHost,
-      public ui::internal::RemoteInputMethodDelegateWin {
- public:
-  // Returns the current RemoteWindowTreeHostWin. This does *not* create a
-  // RemoteWindowTreeHostWin.
-  static RemoteWindowTreeHostWin* Instance();
-
-  // Returns true if there is a RemoteWindowTreeHostWin and it has a valid
-  // HWND. A return value of false typically indicates we're not in metro mode.
-  static bool IsValid();
-
-  // Sets the handle to the remote window. The |remote_window| is the actual
-  // window owned by the viewer process. Call this before Connected() for some
-  // customers like input method initialization which needs the handle.
-  void SetRemoteWindowHandle(HWND remote_window);
-  HWND remote_window() { return remote_window_; }
-
-  // The |host| can be used when we need to send a message to it.
-  void Connected(IPC::Sender* host);
-  // Called when the remote process has closed its IPC connection.
-  void Disconnected();
-
-  // Called when we have a message from the remote process.
-  bool OnMessageReceived(const IPC::Message& message);
-
-  void HandleOpenURLOnDesktop(const base::FilePath& shortcut,
-                              const base::string16& url);
-
-  void HandleWindowSizeChanged(uint32_t width, uint32_t height);
-
-  // Returns the active ASH root window.
-  Window* GetAshWindow();
-
-  // Returns true if the remote window is the foreground window according to the
-  // OS.
-  bool IsForegroundWindow();
-
- protected:
-  RemoteWindowTreeHostWin();
-  ~RemoteWindowTreeHostWin() override;
-
- private:
-  // IPC message handing methods:
-  void OnMouseMoved(int32_t x, int32_t y, int32_t flags);
-  void OnMouseButton(const MetroViewerHostMsg_MouseButtonParams& params);
-  void OnKeyDown(uint32_t vkey,
-                 uint32_t repeat_count,
-                 uint32_t scan_code,
-                 uint32_t flags);
-  void OnKeyUp(uint32_t vkey,
-               uint32_t repeat_count,
-               uint32_t scan_code,
-               uint32_t flags);
-  void OnChar(uint32_t key_code,
-              uint32_t repeat_count,
-              uint32_t scan_code,
-              uint32_t flags);
-  void OnWindowActivated(bool repaint);
-  void OnEdgeGesture();
-  void OnTouchDown(int32_t x,
-                   int32_t y,
-                   uint64_t timestamp,
-                   uint32_t pointer_id);
-  void OnTouchUp(int32_t x, int32_t y, uint64_t timestamp, uint32_t pointer_id);
-  void OnTouchMoved(int32_t x,
-                    int32_t y,
-                    uint64_t timestamp,
-                    uint32_t pointer_id);
-  void OnSetCursorPosAck();
-
-  // For Input Method support:
-  ui::RemoteInputMethodPrivateWin* GetRemoteInputMethodPrivate();
-  void OnImeCandidatePopupChanged(bool visible);
-  void OnImeCompositionChanged(
-      const base::string16& text,
-      int32_t selection_start,
-      int32_t selection_end,
-      const std::vector<metro_viewer::UnderlineInfo>& underlines);
-  void OnImeTextCommitted(const base::string16& text);
-  void OnImeInputSourceChanged(uint16_t language_id, bool is_ime);
-
-  // WindowTreeHost overrides:
-  ui::EventSource* GetEventSource() override;
-  gfx::AcceleratedWidget GetAcceleratedWidget() override;
-  void ShowImpl() override;
-  void HideImpl() override;
-  gfx::Rect GetBounds() const override;
-  void SetBounds(const gfx::Rect& bounds) override;
-  gfx::Point GetLocationOnNativeScreen() const override;
-  void SetCapture() override;
-  void ReleaseCapture() override;
-  void SetCursorNative(gfx::NativeCursor cursor) override;
-  void MoveCursorToNative(const gfx::Point& location) override;
-  void OnCursorVisibilityChangedNative(bool show) override;
-
-  // ui::internal::RemoteInputMethodDelegateWin overrides:
-  void CancelComposition() override;
-  void OnTextInputClientUpdated(
-      const std::vector<int32_t>& input_scopes,
-      const std::vector<gfx::Rect>& composition_character_bounds) override;
-
-  // Helper function to dispatch a keyboard message to the desired target.
-  // The default target is the WindowEventDispatcher. For nested message loop
-  // invocations we post a synthetic keyboard message directly into the message
-  // loop. The dispatcher for the nested loop would then decide how this
-  // message is routed.
-  void DispatchKeyboardMessage(ui::EventType type,
-                               uint32_t vkey,
-                               uint32_t repeat_count,
-                               uint32_t scan_code,
-                               uint32_t flags,
-                               bool is_character);
-
-  // Sets the event flags. |flags| is a bitmask of EventFlags. If there is a
-  // change the system virtual key state is updated as well. This way if chrome
-  // queries for key state it matches that of event being dispatched.
-  void SetEventFlags(uint32_t flags);
-
-  uint32_t mouse_event_flags() const {
-    return event_flags_ & (ui::EF_LEFT_MOUSE_BUTTON |
-                           ui::EF_MIDDLE_MOUSE_BUTTON |
-                           ui::EF_RIGHT_MOUSE_BUTTON);
-  }
-
-  uint32_t key_event_flags() const {
-    return event_flags_ & (ui::EF_SHIFT_DOWN | ui::EF_CONTROL_DOWN |
-                           ui::EF_ALT_DOWN | ui::EF_CAPS_LOCK_ON);
-  }
-
-  HWND remote_window_;
-  IPC::Sender* host_;
-  scoped_ptr<ui::ViewProp> prop_;
-
-  // Incremented if we need to ignore mouse messages until the SetCursorPos
-  // operation is acked by the viewer.
-  int ignore_mouse_moves_until_set_cursor_ack_;
-
-  // Tracking last click event for synthetically generated mouse events.
-  scoped_ptr<ui::MouseEvent> last_mouse_click_event_;
-
-  // State of the keyboard/mouse at the time of the last input event. See
-  // description of SetEventFlags().
-  uint32_t event_flags_;
-
-  // Current size of this root window.
-  gfx::Size window_size_;
-
-  DISALLOW_COPY_AND_ASSIGN(RemoteWindowTreeHostWin);
-};
-
-}  // namespace aura
-
-#endif  // UI_AURA_REMOTE_WINDOW_TREE_HOST_WIN_H_