root/ui/aura/remote_window_tree_host_win.cc

DEFINITIONS

1. SetKeyState
2. SetVirtualKeyStates
3. FillCompositionText
4. HandleOpenFile
5. HandleOpenMultipleFiles
6. HandleSaveFile
7. HandleSelectFolder
8. HandleActivateDesktop
9. HandleMetroExit
10. Instance
11. Create
12. window_size_
13. IsValid
14. SetRemoteWindowHandle
15. Connected
16. Disconnected
17. OnMessageReceived
18. HandleOpenURLOnDesktop
19. HandleActivateDesktop
20. HandleMetroExit
21. HandleOpenFile
22. HandleOpenMultipleFiles
23. HandleSaveFile
24. HandleSelectFolder
25. HandleWindowSizeChanged
26. IsForegroundWindow
27. GetAshWindow
28. GetAcceleratedWidget
29. Show
30. Hide
31. ToggleFullScreen
32. GetBounds
33. SetBounds
34. GetInsets
35. SetInsets
36. GetLocationOnNativeScreen
37. SetCapture
38. ReleaseCapture
39. QueryMouseLocation
40. ConfineCursorToRootWindow
41. UnConfineCursor
42. SetCursorNative
43. MoveCursorToNative
44. OnCursorVisibilityChangedNative
45. PostNativeEvent
46. OnDeviceScaleFactorChanged
47. GetEventProcessor
48. CancelComposition
49. OnTextInputClientUpdated
50. PointFromNativeEvent
51. OnMouseMoved
52. OnMouseButton
53. OnKeyDown
54. OnKeyUp
55. OnChar
56. OnWindowActivated
57. OnEdgeGesture
58. OnTouchDown
59. OnTouchUp
60. OnTouchMoved
61. OnFileSaveAsDone
62. OnFileOpenDone
63. OnMultiFileOpenDone
64. OnSelectFolderDone
65. OnSetCursorPosAck
66. GetRemoteInputMethodPrivate
67. OnImeCandidatePopupChanged
68. OnImeCompositionChanged
69. OnImeTextCommitted
70. OnImeInputSourceChanged
71. DispatchKeyboardMessage
72. SetEventFlags

// 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 "ui/aura/remote_window_tree_host_win.h"

#include <windows.h>

#include <algorithm>

#include "base/message_loop/message_loop.h"
#include "ipc/ipc_message.h"
#include "ipc/ipc_sender.h"
#include "ui/aura/client/aura_constants.h"
#include "ui/aura/client/cursor_client.h"
#include "ui/aura/window_event_dispatcher.h"
#include "ui/aura/window_property.h"
#include "ui/base/cursor/cursor_loader_win.h"
#include "ui/base/ime/composition_text.h"
#include "ui/base/ime/input_method.h"
#include "ui/base/ime/remote_input_method_win.h"
#include "ui/base/ime/text_input_client.h"
#include "ui/base/view_prop.h"
#include "ui/events/event_utils.h"
#include "ui/events/keycodes/keyboard_code_conversion_win.h"
#include "ui/gfx/insets.h"
#include "ui/gfx/win/dpi.h"
#include "ui/metro_viewer/metro_viewer_messages.h"

namespace aura {

namespace {

const char* kWindowTreeHostWinKey = "__AURA_REMOTE_WINDOW_TREE_HOST_WIN__";

// Sets the keystate for the virtual key passed in to down or up.
void SetKeyState(uint8* key_states, bool key_down, uint32 virtual_key_code) {
  DCHECK(key_states);

  if (key_down)
    key_states[virtual_key_code] |= 0x80;
  else
    key_states[virtual_key_code] &= 0x7F;
}

// Sets the keyboard states for the Shift/Control/Alt/Caps lock keys.
void SetVirtualKeyStates(uint32 flags) {
  uint8 keyboard_state[256] = {0};
  ::GetKeyboardState(keyboard_state);

  SetKeyState(keyboard_state, !!(flags & ui::EF_SHIFT_DOWN), VK_SHIFT);
  SetKeyState(keyboard_state, !!(flags & ui::EF_CONTROL_DOWN), VK_CONTROL);
  SetKeyState(keyboard_state, !!(flags & ui::EF_ALT_DOWN), VK_MENU);
  SetKeyState(keyboard_state, !!(flags & ui::EF_CAPS_LOCK_DOWN), VK_CAPITAL);
  SetKeyState(keyboard_state, !!(flags & ui::EF_LEFT_MOUSE_BUTTON), VK_LBUTTON);
  SetKeyState(keyboard_state, !!(flags & ui::EF_RIGHT_MOUSE_BUTTON),
              VK_RBUTTON);
  SetKeyState(keyboard_state, !!(flags & ui::EF_MIDDLE_MOUSE_BUTTON),
              VK_MBUTTON);

  ::SetKeyboardState(keyboard_state);
}

void FillCompositionText(
    const base::string16& text,
    int32 selection_start,
    int32 selection_end,
    const std::vector<metro_viewer::UnderlineInfo>& underlines,
    ui::CompositionText* composition_text) {
  composition_text->Clear();
  composition_text->text = text;
  composition_text->selection.set_start(selection_start);
  composition_text->selection.set_end(selection_end);
  composition_text->underlines.resize(underlines.size());
  for (size_t i = 0; i < underlines.size(); ++i) {
    composition_text->underlines[i].start_offset = underlines[i].start_offset;
    composition_text->underlines[i].end_offset = underlines[i].end_offset;
    composition_text->underlines[i].color = SK_ColorBLACK;
    composition_text->underlines[i].thick = underlines[i].thick;
  }
}

}  // namespace

void HandleOpenFile(const base::string16& title,
                    const base::FilePath& default_path,
                    const base::string16& filter,
                    const OpenFileCompletion& on_success,
                    const FileSelectionCanceled& on_failure) {
  DCHECK(aura::RemoteWindowTreeHostWin::Instance());
  aura::RemoteWindowTreeHostWin::Instance()->HandleOpenFile(title,
                                                            default_path,
                                                            filter,
                                                            on_success,
                                                            on_failure);
}

void HandleOpenMultipleFiles(const base::string16& title,
                             const base::FilePath& default_path,
                             const base::string16& filter,
                             const OpenMultipleFilesCompletion& on_success,
                             const FileSelectionCanceled& on_failure) {
  DCHECK(aura::RemoteWindowTreeHostWin::Instance());
  aura::RemoteWindowTreeHostWin::Instance()->HandleOpenMultipleFiles(
      title,
      default_path,
      filter,
      on_success,
      on_failure);
}

void HandleSaveFile(const base::string16& title,
                    const base::FilePath& default_path,
                    const base::string16& filter,
                    int filter_index,
                    const base::string16& default_extension,
                    const SaveFileCompletion& on_success,
                    const FileSelectionCanceled& on_failure) {
  DCHECK(aura::RemoteWindowTreeHostWin::Instance());
  aura::RemoteWindowTreeHostWin::Instance()->HandleSaveFile(title,
                                                            default_path,
                                                            filter,
                                                            filter_index,
                                                            default_extension,
                                                            on_success,
                                                            on_failure);
}

void HandleSelectFolder(const base::string16& title,
                        const SelectFolderCompletion& on_success,
                        const FileSelectionCanceled& on_failure) {
  DCHECK(aura::RemoteWindowTreeHostWin::Instance());
  aura::RemoteWindowTreeHostWin::Instance()->HandleSelectFolder(title,
                                                                on_success,
                                                                on_failure);
}

void HandleActivateDesktop(const base::FilePath& shortcut,
                           bool ash_exit) {
  DCHECK(aura::RemoteWindowTreeHostWin::Instance());
  aura::RemoteWindowTreeHostWin::Instance()->HandleActivateDesktop(shortcut,
                                                                   ash_exit);
}

void HandleMetroExit() {
  DCHECK(aura::RemoteWindowTreeHostWin::Instance());
  aura::RemoteWindowTreeHostWin::Instance()->HandleMetroExit();
}

RemoteWindowTreeHostWin* g_instance = NULL;

RemoteWindowTreeHostWin* RemoteWindowTreeHostWin::Instance() {
  if (g_instance)
    return g_instance;
  return Create(gfx::Rect());
}

RemoteWindowTreeHostWin* RemoteWindowTreeHostWin::Create(
    const gfx::Rect& bounds) {
  g_instance = g_instance ? g_instance : new RemoteWindowTreeHostWin(bounds);
  return g_instance;
}

RemoteWindowTreeHostWin::RemoteWindowTreeHostWin(const gfx::Rect& bounds)
    : remote_window_(NULL),
      host_(NULL),
      ignore_mouse_moves_until_set_cursor_ack_(false),
      event_flags_(0),
      window_size_(aura::WindowTreeHost::GetNativeScreenSize()) {
  prop_.reset(new ui::ViewProp(NULL, kWindowTreeHostWinKey, this));
  CreateCompositor(GetAcceleratedWidget());
}

RemoteWindowTreeHostWin::~RemoteWindowTreeHostWin() {
  DestroyCompositor();
  DestroyDispatcher();
  g_instance = NULL;
}

// static
bool RemoteWindowTreeHostWin::IsValid() {
  return Instance()->remote_window_ != NULL;
}

void RemoteWindowTreeHostWin::SetRemoteWindowHandle(HWND remote_window) {
  remote_window_ = remote_window;
  // Do not create compositor here, but in Connected() below.
  // See http://crbug.com/330179 and http://crbug.com/334380.
}

void RemoteWindowTreeHostWin::Connected(IPC::Sender* host) {
  CHECK(host_ == NULL);
  DCHECK(remote_window_);
  host_ = host;
  // Recreate the compositor for the target surface represented by the
  // remote_window HWND.
  CreateCompositor(remote_window_);
  InitCompositor();
}

void RemoteWindowTreeHostWin::Disconnected() {
  // Don't CHECK here, Disconnected is called on a channel error which can
  // happen before we're successfully Connected.
  if (!host_)
    return;
  ui::RemoteInputMethodPrivateWin* remote_input_method_private =
      GetRemoteInputMethodPrivate();
  if (remote_input_method_private)
    remote_input_method_private->SetRemoteDelegate(NULL);
  host_ = NULL;
  remote_window_ = NULL;
}

bool RemoteWindowTreeHostWin::OnMessageReceived(const IPC::Message& message) {
  bool handled = true;
  IPC_BEGIN_MESSAGE_MAP(RemoteWindowTreeHostWin, message)
    IPC_MESSAGE_HANDLER(MetroViewerHostMsg_MouseMoved, OnMouseMoved)
    IPC_MESSAGE_HANDLER(MetroViewerHostMsg_MouseButton, OnMouseButton)
    IPC_MESSAGE_HANDLER(MetroViewerHostMsg_KeyDown, OnKeyDown)
    IPC_MESSAGE_HANDLER(MetroViewerHostMsg_KeyUp, OnKeyUp)
    IPC_MESSAGE_HANDLER(MetroViewerHostMsg_Character, OnChar)
    IPC_MESSAGE_HANDLER(MetroViewerHostMsg_WindowActivated,
                        OnWindowActivated)
    IPC_MESSAGE_HANDLER(MetroViewerHostMsg_EdgeGesture, OnEdgeGesture)
    IPC_MESSAGE_HANDLER(MetroViewerHostMsg_TouchDown,
                        OnTouchDown)
    IPC_MESSAGE_HANDLER(MetroViewerHostMsg_TouchUp,
                        OnTouchUp)
    IPC_MESSAGE_HANDLER(MetroViewerHostMsg_TouchMoved,
                        OnTouchMoved)
    IPC_MESSAGE_HANDLER(MetroViewerHostMsg_FileSaveAsDone,
                        OnFileSaveAsDone)
    IPC_MESSAGE_HANDLER(MetroViewerHostMsg_FileOpenDone,
                        OnFileOpenDone)
    IPC_MESSAGE_HANDLER(MetroViewerHostMsg_MultiFileOpenDone,
                        OnMultiFileOpenDone)
    IPC_MESSAGE_HANDLER(MetroViewerHostMsg_SelectFolderDone,
                        OnSelectFolderDone)
    IPC_MESSAGE_HANDLER(MetroViewerHostMsg_SetCursorPosAck,
                        OnSetCursorPosAck)
    IPC_MESSAGE_HANDLER(MetroViewerHostMsg_ImeCandidatePopupChanged,
                        OnImeCandidatePopupChanged)
    IPC_MESSAGE_HANDLER(MetroViewerHostMsg_ImeCompositionChanged,
                        OnImeCompositionChanged)
    IPC_MESSAGE_HANDLER(MetroViewerHostMsg_ImeTextCommitted,
                        OnImeTextCommitted)
    IPC_MESSAGE_HANDLER(MetroViewerHostMsg_ImeInputSourceChanged,
                        OnImeInputSourceChanged)
    IPC_MESSAGE_UNHANDLED(handled = false)
  IPC_END_MESSAGE_MAP()
  return handled;
}

void RemoteWindowTreeHostWin::HandleOpenURLOnDesktop(
    const base::FilePath& shortcut,
    const base::string16& url) {
  if (!host_)
    return;
  host_->Send(new MetroViewerHostMsg_OpenURLOnDesktop(shortcut, url));
}

void RemoteWindowTreeHostWin::HandleActivateDesktop(
    const base::FilePath& shortcut,
    bool ash_exit) {
  if (!host_)
    return;
  host_->Send(new MetroViewerHostMsg_ActivateDesktop(shortcut, ash_exit));
}

void RemoteWindowTreeHostWin::HandleMetroExit() {
  if (!host_)
    return;
  host_->Send(new MetroViewerHostMsg_MetroExit());
}

void RemoteWindowTreeHostWin::HandleOpenFile(
    const base::string16& title,
    const base::FilePath& default_path,
    const base::string16& filter,
    const OpenFileCompletion& on_success,
    const FileSelectionCanceled& on_failure) {
  if (!host_)
    return;

  // Can only have one of these operations in flight.
  DCHECK(file_open_completion_callback_.is_null());
  DCHECK(failure_callback_.is_null());

  file_open_completion_callback_ = on_success;
  failure_callback_ = on_failure;

  host_->Send(new MetroViewerHostMsg_DisplayFileOpen(title,
                                                     filter,
                                                     default_path,
                                                     false));
}

void RemoteWindowTreeHostWin::HandleOpenMultipleFiles(
    const base::string16& title,
    const base::FilePath& default_path,
    const base::string16& filter,
    const OpenMultipleFilesCompletion& on_success,
    const FileSelectionCanceled& on_failure) {
  if (!host_)
    return;

  // Can only have one of these operations in flight.
  DCHECK(multi_file_open_completion_callback_.is_null());
  DCHECK(failure_callback_.is_null());
  multi_file_open_completion_callback_ = on_success;
  failure_callback_ = on_failure;

  host_->Send(new MetroViewerHostMsg_DisplayFileOpen(title,
                                                     filter,
                                                     default_path,
                                                     true));
}

void RemoteWindowTreeHostWin::HandleSaveFile(
    const base::string16& title,
    const base::FilePath& default_path,
    const base::string16& filter,
    int filter_index,
    const base::string16& default_extension,
    const SaveFileCompletion& on_success,
    const FileSelectionCanceled& on_failure) {
  if (!host_)
    return;

  MetroViewerHostMsg_SaveAsDialogParams params;
  params.title = title;
  params.default_extension = default_extension;
  params.filter = filter;
  params.filter_index = filter_index;
  params.suggested_name = default_path;

  // Can only have one of these operations in flight.
  DCHECK(file_saveas_completion_callback_.is_null());
  DCHECK(failure_callback_.is_null());
  file_saveas_completion_callback_ = on_success;
  failure_callback_ = on_failure;

  host_->Send(new MetroViewerHostMsg_DisplayFileSaveAs(params));
}

void RemoteWindowTreeHostWin::HandleSelectFolder(
    const base::string16& title,
    const SelectFolderCompletion& on_success,
    const FileSelectionCanceled& on_failure) {
  if (!host_)
    return;

  // Can only have one of these operations in flight.
  DCHECK(select_folder_completion_callback_.is_null());
  DCHECK(failure_callback_.is_null());
  select_folder_completion_callback_ = on_success;
  failure_callback_ = on_failure;

  host_->Send(new MetroViewerHostMsg_DisplaySelectFolder(title));
}

void RemoteWindowTreeHostWin::HandleWindowSizeChanged(uint32 width,
                                                      uint32 height) {
  SetBounds(gfx::Rect(0, 0, width, height));
}

bool RemoteWindowTreeHostWin::IsForegroundWindow() {
  return ::GetForegroundWindow() == remote_window_;
}

Window* RemoteWindowTreeHostWin::GetAshWindow() {
  return window();
}

gfx::AcceleratedWidget RemoteWindowTreeHostWin::GetAcceleratedWidget() {
  if (remote_window_)
    return remote_window_;
  // Getting here should only happen for ash_unittests.exe and related code.
  return ::GetDesktopWindow();
}

void RemoteWindowTreeHostWin::Show() {
  ui::RemoteInputMethodPrivateWin* remote_input_method_private =
      GetRemoteInputMethodPrivate();
  if (remote_input_method_private)
    remote_input_method_private->SetRemoteDelegate(this);
}

void RemoteWindowTreeHostWin::Hide() {
  NOTIMPLEMENTED();
}

void RemoteWindowTreeHostWin::ToggleFullScreen() {
}

gfx::Rect RemoteWindowTreeHostWin::GetBounds() const {
  return gfx::Rect(window_size_);
}

void RemoteWindowTreeHostWin::SetBounds(const gfx::Rect& bounds) {
  window_size_ = bounds.size();
  OnHostResized(bounds.size());
}

gfx::Insets RemoteWindowTreeHostWin::GetInsets() const {
  return gfx::Insets();
}

void RemoteWindowTreeHostWin::SetInsets(const gfx::Insets& insets) {
}

gfx::Point RemoteWindowTreeHostWin::GetLocationOnNativeScreen() const {
  return gfx::Point(0, 0);
}

void RemoteWindowTreeHostWin::SetCapture() {
}

void RemoteWindowTreeHostWin::ReleaseCapture() {
}

bool RemoteWindowTreeHostWin::QueryMouseLocation(gfx::Point* location_return) {
  aura::client::CursorClient* cursor_client =
      aura::client::GetCursorClient(window());
  if (cursor_client && !cursor_client->IsMouseEventsEnabled()) {
    *location_return = gfx::Point(0, 0);
    return false;
  }
  POINT pt;
  GetCursorPos(&pt);
  *location_return =
      gfx::Point(static_cast<int>(pt.x), static_cast<int>(pt.y));
  return true;
}

bool RemoteWindowTreeHostWin::ConfineCursorToRootWindow() {
  return true;
}

void RemoteWindowTreeHostWin::UnConfineCursor() {
}

void RemoteWindowTreeHostWin::SetCursorNative(gfx::NativeCursor native_cursor) {
  if (!host_)
    return;
  host_->Send(
    new MetroViewerHostMsg_SetCursor(uint64(native_cursor.platform())));
}

void RemoteWindowTreeHostWin::MoveCursorToNative(const gfx::Point& location) {
  VLOG(1) << "In MoveCursorTo: " << location.x() << ", " << location.y();
  if (!host_)
    return;

  // This function can be called in cases like when the mouse cursor is
  // restricted within a viewport (For e.g. LockCursor) which assumes that
  // subsequent mouse moves would be received starting with the new cursor
  // coordinates. This is a challenge for Windows ASH for the reasons
  // outlined below.
  // Other cases which don't expect this behavior should continue to work
  // without issues.

  // The mouse events are received by the viewer process and sent to the
  // browser. If we invoke the SetCursor API here we continue to receive
  // mouse messages from the viewer which were posted before the SetCursor
  // API executes which messes up the state in the browser. To workaround
  // this we invoke the SetCursor API in the viewer process and ignore
  // mouse messages until we received an ACK from the viewer indicating that
  // the SetCursor operation completed.
  ignore_mouse_moves_until_set_cursor_ack_ = true;
  VLOG(1) << "In MoveCursorTo. Sending IPC";
  host_->Send(new MetroViewerHostMsg_SetCursorPos(location.x(), location.y()));
}

void RemoteWindowTreeHostWin::OnCursorVisibilityChangedNative(bool show) {
  NOTIMPLEMENTED();
}

void RemoteWindowTreeHostWin::PostNativeEvent(
    const base::NativeEvent& native_event) {
}

void RemoteWindowTreeHostWin::OnDeviceScaleFactorChanged(
    float device_scale_factor) {
  NOTIMPLEMENTED();
}

ui::EventProcessor* RemoteWindowTreeHostWin::GetEventProcessor() {
  return dispatcher();
}

void RemoteWindowTreeHostWin::CancelComposition() {
  if (!host_)
    return;
  host_->Send(new MetroViewerHostMsg_ImeCancelComposition);
}

void RemoteWindowTreeHostWin::OnTextInputClientUpdated(
    const std::vector<int32>& input_scopes,
    const std::vector<gfx::Rect>& composition_character_bounds) {
  if (!host_)
    return;
  std::vector<metro_viewer::CharacterBounds> character_bounds;
  for (size_t i = 0; i < composition_character_bounds.size(); ++i) {
    const gfx::Rect& rect = composition_character_bounds[i];
    metro_viewer::CharacterBounds bounds;
    bounds.left = rect.x();
    bounds.top = rect.y();
    bounds.right = rect.right();
    bounds.bottom = rect.bottom();
    character_bounds.push_back(bounds);
  }
  host_->Send(new MetroViewerHostMsg_ImeTextInputClientUpdated(
      input_scopes, character_bounds));
}

gfx::Point PointFromNativeEvent(int32 x, int32 y) {
  static float scale_factor = gfx::GetModernUIScale();
  gfx::Point result( x * scale_factor, y * scale_factor);
  return result;
}

void RemoteWindowTreeHostWin::OnMouseMoved(int32 x, int32 y, int32 flags) {
  if (ignore_mouse_moves_until_set_cursor_ack_)
    return;

  gfx::Point location = PointFromNativeEvent(x, y);
  ui::MouseEvent event(ui::ET_MOUSE_MOVED, location, location, flags, 0);
  SendEventToProcessor(&event);
}

void RemoteWindowTreeHostWin::OnMouseButton(
    const MetroViewerHostMsg_MouseButtonParams& params) {
  gfx::Point location = PointFromNativeEvent(params.x, params.y);
  ui::MouseEvent mouse_event(params.event_type, location, location,
                             static_cast<int>(params.flags),
                             static_cast<int>(params.changed_button));

  SetEventFlags(params.flags | key_event_flags());
  if (params.event_type == ui::ET_MOUSEWHEEL) {
    int x_offset = params.is_horizontal_wheel ? params.extra : 0;
    int y_offset = !params.is_horizontal_wheel ? params.extra : 0;
    ui::MouseWheelEvent wheel_event(mouse_event, x_offset, y_offset);
    SendEventToProcessor(&wheel_event);
  } else if (params.event_type == ui::ET_MOUSE_PRESSED) {
    // TODO(shrikant): Ideally modify code in event.cc by adding automatic
    // tracking of double clicks in synthetic MouseEvent constructor code.
    // Non-synthetic MouseEvent constructor code does automatically track
    // this. Need to use some caution while modifying synthetic constructor
    // as many tests and other code paths depend on it and apparently
    // specifically depend on non implicit tracking of previous mouse event.
    if (last_mouse_click_event_ &&
        ui::MouseEvent::IsRepeatedClickEvent(mouse_event,
                                             *last_mouse_click_event_)) {
      mouse_event.SetClickCount(2);
    } else {
      mouse_event.SetClickCount(1);
    }
    last_mouse_click_event_ .reset(new ui::MouseEvent(mouse_event));
    SendEventToProcessor(&mouse_event);
  } else {
    SendEventToProcessor(&mouse_event);
  }
}

void RemoteWindowTreeHostWin::OnKeyDown(uint32 vkey,
                                        uint32 repeat_count,
                                        uint32 scan_code,
                                        uint32 flags) {
  DispatchKeyboardMessage(ui::ET_KEY_PRESSED, vkey, repeat_count, scan_code,
                          flags, false);
}

void RemoteWindowTreeHostWin::OnKeyUp(uint32 vkey,
                                      uint32 repeat_count,
                                      uint32 scan_code,
                                      uint32 flags) {
  DispatchKeyboardMessage(ui::ET_KEY_RELEASED, vkey, repeat_count, scan_code,
                          flags, false);
}

void RemoteWindowTreeHostWin::OnChar(uint32 key_code,
                                     uint32 repeat_count,
                                     uint32 scan_code,
                                     uint32 flags) {
  DispatchKeyboardMessage(ui::ET_KEY_PRESSED, key_code, repeat_count,
                          scan_code, flags, true);
}

void RemoteWindowTreeHostWin::OnWindowActivated() {
  OnHostActivated();
}

void RemoteWindowTreeHostWin::OnEdgeGesture() {
  ui::GestureEvent event(
      ui::ET_GESTURE_WIN8_EDGE_SWIPE,
      0,
      0,
      0,
      ui::EventTimeForNow(),
      ui::GestureEventDetails(ui::ET_GESTURE_WIN8_EDGE_SWIPE, 0, 0),
      0);
  SendEventToProcessor(&event);
}

void RemoteWindowTreeHostWin::OnTouchDown(int32 x,
                                          int32 y,
                                          uint64 timestamp,
                                          uint32 pointer_id) {
  gfx::Point location = PointFromNativeEvent(x, y);
  ui::TouchEvent event(ui::ET_TOUCH_PRESSED,
                       location,
                       pointer_id,
                       base::TimeDelta::FromMicroseconds(timestamp));
  SendEventToProcessor(&event);
}

void RemoteWindowTreeHostWin::OnTouchUp(int32 x,
                                        int32 y,
                                        uint64 timestamp,
                                        uint32 pointer_id) {
  gfx::Point location = PointFromNativeEvent(x, y);
  ui::TouchEvent event(ui::ET_TOUCH_RELEASED,
                       location,
                       pointer_id,
                       base::TimeDelta::FromMicroseconds(timestamp));
  SendEventToProcessor(&event);
}

void RemoteWindowTreeHostWin::OnTouchMoved(int32 x,
                                           int32 y,
                                           uint64 timestamp,
                                           uint32 pointer_id) {
  gfx::Point location = PointFromNativeEvent(x, y);
  ui::TouchEvent event(ui::ET_TOUCH_MOVED,
                       location,
                       pointer_id,
                       base::TimeDelta::FromMicroseconds(timestamp));
  SendEventToProcessor(&event);
}

void RemoteWindowTreeHostWin::OnFileSaveAsDone(bool success,
                                               const base::FilePath& filename,
                                               int filter_index) {
  if (success)
    file_saveas_completion_callback_.Run(filename, filter_index, NULL);
  else
    failure_callback_.Run(NULL);
  file_saveas_completion_callback_.Reset();
  failure_callback_.Reset();
}


void RemoteWindowTreeHostWin::OnFileOpenDone(bool success,
                                             const base::FilePath& filename) {
  if (success)
    file_open_completion_callback_.Run(base::FilePath(filename), 0, NULL);
  else
    failure_callback_.Run(NULL);
  file_open_completion_callback_.Reset();
  failure_callback_.Reset();
}

void RemoteWindowTreeHostWin::OnMultiFileOpenDone(
    bool success,
    const std::vector<base::FilePath>& files) {
  if (success)
    multi_file_open_completion_callback_.Run(files, NULL);
  else
    failure_callback_.Run(NULL);
  multi_file_open_completion_callback_.Reset();
  failure_callback_.Reset();
}

void RemoteWindowTreeHostWin::OnSelectFolderDone(
    bool success,
    const base::FilePath& folder) {
  if (success)
    select_folder_completion_callback_.Run(base::FilePath(folder), 0, NULL);
  else
    failure_callback_.Run(NULL);
  select_folder_completion_callback_.Reset();
  failure_callback_.Reset();
}

void RemoteWindowTreeHostWin::OnSetCursorPosAck() {
  DCHECK(ignore_mouse_moves_until_set_cursor_ack_);
  ignore_mouse_moves_until_set_cursor_ack_ = false;
}

ui::RemoteInputMethodPrivateWin*
RemoteWindowTreeHostWin::GetRemoteInputMethodPrivate() {
  ui::InputMethod* input_method = GetAshWindow()->GetProperty(
      aura::client::kRootWindowInputMethodKey);
  return ui::RemoteInputMethodPrivateWin::Get(input_method);
}

void RemoteWindowTreeHostWin::OnImeCandidatePopupChanged(bool visible) {
  ui::RemoteInputMethodPrivateWin* remote_input_method_private =
      GetRemoteInputMethodPrivate();
  if (!remote_input_method_private)
    return;
  remote_input_method_private->OnCandidatePopupChanged(visible);
}

void RemoteWindowTreeHostWin::OnImeCompositionChanged(
    const base::string16& text,
    int32 selection_start,
    int32 selection_end,
    const std::vector<metro_viewer::UnderlineInfo>& underlines) {
  ui::RemoteInputMethodPrivateWin* remote_input_method_private =
      GetRemoteInputMethodPrivate();
  if (!remote_input_method_private)
    return;
  ui::CompositionText composition_text;
  FillCompositionText(
      text, selection_start, selection_end, underlines, &composition_text);
  remote_input_method_private->OnCompositionChanged(composition_text);
}

void RemoteWindowTreeHostWin::OnImeTextCommitted(const base::string16& text) {
  ui::RemoteInputMethodPrivateWin* remote_input_method_private =
      GetRemoteInputMethodPrivate();
  if (!remote_input_method_private)
    return;
  remote_input_method_private->OnTextCommitted(text);
}

void RemoteWindowTreeHostWin::OnImeInputSourceChanged(uint16 language_id,
                                                      bool is_ime) {
  ui::RemoteInputMethodPrivateWin* remote_input_method_private =
      GetRemoteInputMethodPrivate();
  if (!remote_input_method_private)
    return;
  remote_input_method_private->OnInputSourceChanged(language_id, is_ime);
}

void RemoteWindowTreeHostWin::DispatchKeyboardMessage(ui::EventType type,
                                                      uint32 vkey,
                                                      uint32 repeat_count,
                                                      uint32 scan_code,
                                                      uint32 flags,
                                                      bool is_character) {
  SetEventFlags(flags | mouse_event_flags());
  if (base::MessageLoop::current()->IsNested()) {
    int index = (flags & ui::EF_ALT_DOWN) ? 1 : 0;
    const int char_message[] = {WM_CHAR, WM_SYSCHAR};
    const int keydown_message[] = {WM_KEYDOWN, WM_SYSKEYDOWN};
    const int keyup_message[] = {WM_KEYUP, WM_SYSKEYUP};
    uint32 message = is_character
                         ? char_message[index]
                         : (type == ui::ET_KEY_PRESSED ? keydown_message[index]
                                                       : keyup_message[index]);
    ::PostThreadMessage(::GetCurrentThreadId(),
                        message,
                        vkey,
                        repeat_count | scan_code >> 15);
  } else {
    ui::KeyEvent event(type,
                       ui::KeyboardCodeForWindowsKeyCode(vkey),
                       flags,
                       is_character);
    SendEventToProcessor(&event);
  }
}

void RemoteWindowTreeHostWin::SetEventFlags(uint32 flags) {
  if (flags == event_flags_)
    return;
  event_flags_ = flags;
  SetVirtualKeyStates(event_flags_);
}

}  // namespace aura