ui/aura/remote_window_tree_host_win.h

   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 #ifndef UI_AURA_REMOTE_WINDOW_TREE_HOST_WIN_H_
   6 #define UI_AURA_REMOTE_WINDOW_TREE_HOST_WIN_H_
   7
   8 #include <vector>
   9
  10 #include "base/compiler_specific.h"
  11 #include "base/strings/string16.h"
  12 #include "ui/aura/window_tree_host.h"
  13 #include "ui/base/ime/remote_input_method_delegate_win.h"
  14 #include "ui/events/event.h"
  15 #include "ui/events/event_constants.h"
  16 #include "ui/events/event_source.h"
  17 #include "ui/gfx/native_widget_types.h"
  18 #include "ui/metro_viewer/ime_types.h"
  19
  20 struct MetroViewerHostMsg_MouseButtonParams;
  21
  22 namespace base {
  23 class FilePath;
  24 }
  25
  26 namespace ui {
  27 class RemoteInputMethodPrivateWin;
  28 class ViewProp;
  29 }
  30
  31 namespace IPC {
  32 class Message;
  33 class Sender;
  34 }
  35
  36 namespace aura {
  37
  38 // WindowTreeHost implementaton that receives events from a different
  39 // process. In the case of Windows this is the Windows 8 (aka Metro)
  40 // frontend process, which forwards input events to this class.
  41 class AURA_EXPORT RemoteWindowTreeHostWin
  42     : public WindowTreeHost,
  43       public ui::EventSource,
  44       public ui::internal::RemoteInputMethodDelegateWin {
  45  public:
  46   // Returns the current RemoteWindowTreeHostWin. This does *not* create a
  47   // RemoteWindowTreeHostWin.
  48   static RemoteWindowTreeHostWin* Instance();
  49
  50   // Returns true if there is a RemoteWindowTreeHostWin and it has a valid
  51   // HWND. A return value of false typically indicates we're not in metro mode.
  52   static bool IsValid();
  53
  54   // Sets the handle to the remote window. The |remote_window| is the actual
  55   // window owned by the viewer process. Call this before Connected() for some
  56   // customers like input method initialization which needs the handle.
  57   void SetRemoteWindowHandle(HWND remote_window);
  58   HWND remote_window() { return remote_window_; }
  59
  60   // The |host| can be used when we need to send a message to it.
  61   void Connected(IPC::Sender* host);
  62   // Called when the remote process has closed its IPC connection.
  63   void Disconnected();
  64
  65   // Called when we have a message from the remote process.
  66   bool OnMessageReceived(const IPC::Message& message);
  67
  68   void HandleOpenURLOnDesktop(const base::FilePath& shortcut,
  69                               const base::string16& url);
  70
  71   void HandleWindowSizeChanged(uint32 width, uint32 height);
  72
  73   // Returns the active ASH root window.
  74   Window* GetAshWindow();
  75
  76   // Returns true if the remote window is the foreground window according to the
  77   // OS.
  78   bool IsForegroundWindow();
  79
  80  protected:
  81   RemoteWindowTreeHostWin();
  82   ~RemoteWindowTreeHostWin() override;
  83
  84  private:
  85   // IPC message handing methods:
  86   void OnMouseMoved(int32 x, int32 y, int32 flags);
  87   void OnMouseButton(const MetroViewerHostMsg_MouseButtonParams& params);
  88   void OnKeyDown(uint32 vkey,
  89                  uint32 repeat_count,
  90                  uint32 scan_code,
  91                  uint32 flags);
  92   void OnKeyUp(uint32 vkey,
  93                uint32 repeat_count,
  94                uint32 scan_code,
  95                uint32 flags);
  96   void OnChar(uint32 key_code,
  97               uint32 repeat_count,
  98               uint32 scan_code,
  99               uint32 flags);
 100   void OnWindowActivated(bool repaint);
 101   void OnEdgeGesture();
 102   void OnTouchDown(int32 x, int32 y, uint64 timestamp, uint32 pointer_id);
 103   void OnTouchUp(int32 x, int32 y, uint64 timestamp, uint32 pointer_id);
 104   void OnTouchMoved(int32 x, int32 y, uint64 timestamp, uint32 pointer_id);
 105   void OnSetCursorPosAck();
 106
 107   // For Input Method support:
 108   ui::RemoteInputMethodPrivateWin* GetRemoteInputMethodPrivate();
 109   void OnImeCandidatePopupChanged(bool visible);
 110   void OnImeCompositionChanged(
 111       const base::string16& text,
 112       int32 selection_start,
 113       int32 selection_end,
 114       const std::vector<metro_viewer::UnderlineInfo>& underlines);
 115   void OnImeTextCommitted(const base::string16& text);
 116   void OnImeInputSourceChanged(uint16 language_id, bool is_ime);
 117
 118   // WindowTreeHost overrides:
 119   ui::EventSource* GetEventSource() override;
 120   gfx::AcceleratedWidget GetAcceleratedWidget() override;
 121   void Show() override;
 122   void Hide() override;
 123   gfx::Rect GetBounds() const override;
 124   void SetBounds(const gfx::Rect& bounds) override;
 125   gfx::Point GetLocationOnNativeScreen() const override;
 126   void SetCapture() override;
 127   void ReleaseCapture() override;
 128   void SetCursorNative(gfx::NativeCursor cursor) override;
 129   void MoveCursorToNative(const gfx::Point& location) override;
 130   void OnCursorVisibilityChangedNative(bool show) override;
 131
 132   // ui::EventSource:
 133   ui::EventProcessor* GetEventProcessor() override;
 134
 135   // ui::internal::RemoteInputMethodDelegateWin overrides:
 136   void CancelComposition() override;
 137   void OnTextInputClientUpdated(
 138       const std::vector<int32>& input_scopes,
 139       const std::vector<gfx::Rect>& composition_character_bounds) override;
 140
 141   // Helper function to dispatch a keyboard message to the desired target.
 142   // The default target is the WindowEventDispatcher. For nested message loop
 143   // invocations we post a synthetic keyboard message directly into the message
 144   // loop. The dispatcher for the nested loop would then decide how this
 145   // message is routed.
 146   void DispatchKeyboardMessage(ui::EventType type,
 147                                uint32 vkey,
 148                                uint32 repeat_count,
 149                                uint32 scan_code,
 150                                uint32 flags,
 151                                bool is_character);
 152
 153   // Sets the event flags. |flags| is a bitmask of EventFlags. If there is a
 154   // change the system virtual key state is updated as well. This way if chrome
 155   // queries for key state it matches that of event being dispatched.
 156   void SetEventFlags(uint32 flags);
 157
 158   uint32 mouse_event_flags() const {
 159     return event_flags_ & (ui::EF_LEFT_MOUSE_BUTTON |
 160                            ui::EF_MIDDLE_MOUSE_BUTTON |
 161                            ui::EF_RIGHT_MOUSE_BUTTON);
 162   }
 163
 164   uint32 key_event_flags() const {
 165     return event_flags_ & (ui::EF_SHIFT_DOWN | ui::EF_CONTROL_DOWN |
 166                            ui::EF_ALT_DOWN | ui::EF_CAPS_LOCK_DOWN);
 167   }
 168
 169   HWND remote_window_;
 170   IPC::Sender* host_;
 171   scoped_ptr<ui::ViewProp> prop_;
 172
 173   // Incremented if we need to ignore mouse messages until the SetCursorPos
 174   // operation is acked by the viewer.
 175   int ignore_mouse_moves_until_set_cursor_ack_;
 176
 177   // Tracking last click event for synthetically generated mouse events.
 178   scoped_ptr<ui::MouseEvent> last_mouse_click_event_;
 179
 180   // State of the keyboard/mouse at the time of the last input event. See
 181   // description of SetEventFlags().
 182   uint32 event_flags_;
 183
 184   // Current size of this root window.
 185   gfx::Size window_size_;
 186
 187   DISALLOW_COPY_AND_ASSIGN(RemoteWindowTreeHostWin);
 188 };
 189
 190 }  // namespace aura
 191
 192 #endif  // UI_AURA_REMOTE_WINDOW_TREE_HOST_WIN_H_