It is time.

ui/wm/core/cursor_manager.cc

-// Copyright (c) 2013 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/wm/core/cursor_manager.h"
-
-#include "base/logging.h"
-#include "ui/aura/client/cursor_client_observer.h"
-#include "ui/wm/core/native_cursor_manager.h"
-#include "ui/wm/core/native_cursor_manager_delegate.h"
-
-namespace wm {
-
-namespace internal {
-
-// Represents the cursor state which is composed of cursor type, visibility, and
-// mouse events enable state. When mouse events are disabled, the cursor is
-// always invisible.
-class CursorState {
- public:
-  CursorState()
-      : cursor_(ui::kCursorNone),
-        visible_(true),
-        cursor_set_(ui::CURSOR_SET_NORMAL),
-        mouse_events_enabled_(true),
-        visible_on_mouse_events_enabled_(true) {
-  }
-
-  gfx::NativeCursor cursor() const { return cursor_; }
-  void set_cursor(gfx::NativeCursor cursor) { cursor_ = cursor; }
-
-  bool visible() const { return visible_; }
-  void SetVisible(bool visible) {
-    if (mouse_events_enabled_)
-      visible_ = visible;
-    // Ignores the call when mouse events disabled.
-  }
-
-  ui::CursorSetType cursor_set() const { return cursor_set_; }
-  void set_cursor_set(ui::CursorSetType cursor_set) {
-    cursor_set_ = cursor_set;
-  }
-
-  bool mouse_events_enabled() const { return mouse_events_enabled_; }
-  void SetMouseEventsEnabled(bool enabled) {
-    if (mouse_events_enabled_ == enabled)
-      return;
-    mouse_events_enabled_ = enabled;
-
-    // Restores the visibility when mouse events are enabled.
-    if (enabled) {
-      visible_ = visible_on_mouse_events_enabled_;
-    } else {
-      visible_on_mouse_events_enabled_ = visible_;
-      visible_ = false;
-    }
-  }
-
- private:
-  gfx::NativeCursor cursor_;
-  bool visible_;
-  ui::CursorSetType cursor_set_;
-  bool mouse_events_enabled_;
-
-  // The visibility to set when mouse events are enabled.
-  bool visible_on_mouse_events_enabled_;
-
-  DISALLOW_COPY_AND_ASSIGN(CursorState);
-};
-
-}  // namespace internal
-
-CursorManager::CursorManager(scoped_ptr<NativeCursorManager> delegate)
-    : delegate_(delegate.Pass()),
-      cursor_lock_count_(0),
-      current_state_(new internal::CursorState),
-      state_on_unlock_(new internal::CursorState) {
-}
-
-CursorManager::~CursorManager() {
-}
-
-void CursorManager::SetCursor(gfx::NativeCursor cursor) {
-  state_on_unlock_->set_cursor(cursor);
-  if (cursor_lock_count_ == 0 &&
-      GetCursor() != state_on_unlock_->cursor()) {
-    delegate_->SetCursor(state_on_unlock_->cursor(), this);
-  }
-}
-
-gfx::NativeCursor CursorManager::GetCursor() const {
-  return current_state_->cursor();
-}
-
-void CursorManager::ShowCursor() {
-  state_on_unlock_->SetVisible(true);
-  if (cursor_lock_count_ == 0 &&
-      IsCursorVisible() != state_on_unlock_->visible()) {
-    delegate_->SetVisibility(state_on_unlock_->visible(), this);
-    FOR_EACH_OBSERVER(aura::client::CursorClientObserver, observers_,
-                      OnCursorVisibilityChanged(true));
-  }
-}
-
-void CursorManager::HideCursor() {
-  state_on_unlock_->SetVisible(false);
-  if (cursor_lock_count_ == 0 &&
-      IsCursorVisible() != state_on_unlock_->visible()) {
-    delegate_->SetVisibility(state_on_unlock_->visible(), this);
-    FOR_EACH_OBSERVER(aura::client::CursorClientObserver, observers_,
-                      OnCursorVisibilityChanged(false));
-  }
-}
-
-bool CursorManager::IsCursorVisible() const {
-  return current_state_->visible();
-}
-
-void CursorManager::SetCursorSet(ui::CursorSetType cursor_set) {
-  state_on_unlock_->set_cursor_set(cursor_set);
-  if (GetCursorSet() != state_on_unlock_->cursor_set())
-    delegate_->SetCursorSet(state_on_unlock_->cursor_set(), this);
-}
-
-ui::CursorSetType CursorManager::GetCursorSet() const {
-  return current_state_->cursor_set();
-}
-
-void CursorManager::EnableMouseEvents() {
-  state_on_unlock_->SetMouseEventsEnabled(true);
-  if (cursor_lock_count_ == 0 &&
-      IsMouseEventsEnabled() != state_on_unlock_->mouse_events_enabled()) {
-    delegate_->SetMouseEventsEnabled(state_on_unlock_->mouse_events_enabled(),
-                                     this);
-  }
-}
-
-void CursorManager::DisableMouseEvents() {
-  state_on_unlock_->SetMouseEventsEnabled(false);
-  if (cursor_lock_count_ == 0 &&
-      IsMouseEventsEnabled() != state_on_unlock_->mouse_events_enabled()) {
-    delegate_->SetMouseEventsEnabled(state_on_unlock_->mouse_events_enabled(),
-                                     this);
-  }
-}
-
-bool CursorManager::IsMouseEventsEnabled() const {
-  return current_state_->mouse_events_enabled();
-}
-
-void CursorManager::SetDisplay(const gfx::Display& display) {
-  delegate_->SetDisplay(display, this);
-}
-
-void CursorManager::LockCursor() {
-  cursor_lock_count_++;
-}
-
-void CursorManager::UnlockCursor() {
-  cursor_lock_count_--;
-  DCHECK_GE(cursor_lock_count_, 0);
-  if (cursor_lock_count_ > 0)
-    return;
-
-  if (GetCursor() != state_on_unlock_->cursor()) {
-    delegate_->SetCursor(state_on_unlock_->cursor(), this);
-  }
-  if (IsMouseEventsEnabled() != state_on_unlock_->mouse_events_enabled()) {
-    delegate_->SetMouseEventsEnabled(state_on_unlock_->mouse_events_enabled(),
-                                     this);
-  }
-  if (IsCursorVisible() != state_on_unlock_->visible()) {
-    delegate_->SetVisibility(state_on_unlock_->visible(),
-                             this);
-  }
-}
-
-bool CursorManager::IsCursorLocked() const {
-  return cursor_lock_count_ > 0;
-}
-
-void CursorManager::AddObserver(
-    aura::client::CursorClientObserver* observer) {
-  observers_.AddObserver(observer);
-}
-
-void CursorManager::RemoveObserver(
-    aura::client::CursorClientObserver* observer) {
-  observers_.RemoveObserver(observer);
-}
-
-bool CursorManager::ShouldHideCursorOnKeyEvent(
-    const ui::KeyEvent& event) const {
-  return false;
-}
-
-void CursorManager::CommitCursor(gfx::NativeCursor cursor) {
-  current_state_->set_cursor(cursor);
-}
-
-void CursorManager::CommitVisibility(bool visible) {
-  // TODO(tdanderson): Find a better place for this so we don't
-  // notify the observers more than is necessary.
-  FOR_EACH_OBSERVER(aura::client::CursorClientObserver, observers_,
-                    OnCursorVisibilityChanged(visible));
-  current_state_->SetVisible(visible);
-}
-
-void CursorManager::CommitCursorSet(ui::CursorSetType cursor_set) {
-  current_state_->set_cursor_set(cursor_set);
-}
-
-void CursorManager::CommitMouseEventsEnabled(bool enabled) {
-  current_state_->SetMouseEventsEnabled(enabled);
-}
-
-}  // namespace wm