Rework ash::CursorManager into a corewm object, to share code with desktop.

ash/wm/cursor_manager.cc

 // 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 "ash/wm/cursor_manager.h"
 
 #include "ash/shell.h"
 #include "ash/wm/image_cursors.h"
 #include "base/logging.h"
 #include "ui/aura/env.h"
@@ skipping 26 matching lines @@
   ash::Shell::RootWindowList root_windows =
       ash::Shell::GetInstance()->GetAllRootWindows();
   for (ash::Shell::RootWindowList::iterator iter = root_windows.begin();
        iter != root_windows.end(); ++iter)
     (*iter)->OnMouseEventsEnableStateChanged(enabled);
 }
 
 }  // namespace
 
 namespace ash {
-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),
-        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.
-  }
-
-  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_;
-  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()
-    : cursor_lock_count_(0),
-      current_state_(new internal::CursorState),
-      state_on_unlock_(new internal::CursorState),
-      image_cursors_(new ImageCursors) {
+    : image_cursors_(new ImageCursors) {
 }
 
 CursorManager::~CursorManager() {
 }
 
-void CursorManager::SetCursor(gfx::NativeCursor cursor) {
-  state_on_unlock_->set_cursor(cursor);
-  if (cursor_lock_count_ == 0 &&
-      GetCurrentCursor() != state_on_unlock_->cursor()) {
-    SetCursorInternal(state_on_unlock_->cursor());
-  }
-}
-
-void CursorManager::ShowCursor() {
-  state_on_unlock_->SetVisible(true);
-  if (cursor_lock_count_ == 0 &&
-      IsCursorVisible() != state_on_unlock_->visible()) {
-    SetCursorVisibility(state_on_unlock_->visible());
-  }
-}
-
-void CursorManager::HideCursor() {
-  state_on_unlock_->SetVisible(false);
-  if (cursor_lock_count_ == 0 &&
-      IsCursorVisible() != state_on_unlock_->visible()) {
-    SetCursorVisibility(state_on_unlock_->visible());
-  }
-}
-
-bool CursorManager::IsCursorVisible() const {
-  return current_state_->visible();
-}
-
-void CursorManager::EnableMouseEvents() {
-  state_on_unlock_->SetMouseEventsEnabled(true);
-  if (cursor_lock_count_ == 0 &&
-      IsMouseEventsEnabled() != state_on_unlock_->mouse_events_enabled()) {
-    SetMouseEventsEnabled(state_on_unlock_->mouse_events_enabled());
-  }
-}
-
-void CursorManager::DisableMouseEvents() {
-  state_on_unlock_->SetMouseEventsEnabled(false);
-  if (cursor_lock_count_ == 0 &&
-      IsMouseEventsEnabled() != state_on_unlock_->mouse_events_enabled()) {
-    SetMouseEventsEnabled(state_on_unlock_->mouse_events_enabled());
-  }
-}
-
-bool CursorManager::IsMouseEventsEnabled() const {
-  return current_state_->mouse_events_enabled();
-}
-
 void CursorManager::SetDeviceScaleFactor(float device_scale_factor) {
   if (image_cursors_->SetDeviceScaleFactor(device_scale_factor))
     SetCursorInternal(GetCurrentCursor());
 }
 
-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 (GetCurrentCursor() != state_on_unlock_->cursor())
-    SetCursorInternal(state_on_unlock_->cursor());
-  if (IsMouseEventsEnabled() != state_on_unlock_->mouse_events_enabled())
-    SetMouseEventsEnabled(state_on_unlock_->mouse_events_enabled());
-  if (IsCursorVisible() != state_on_unlock_->visible())
-    SetCursorVisibility(state_on_unlock_->visible());
-}
-
 void CursorManager::SetCursorInternal(gfx::NativeCursor cursor) {
   gfx::NativeCursor new_cursor = cursor;
   image_cursors_->SetPlatformCursor(&new_cursor);
   new_cursor.set_device_scale_factor(image_cursors_->GetDeviceScaleFactor());
-  current_state_->set_cursor(new_cursor);
+
+  CursorController::SetCursorInternal(new_cursor);
 
   if (IsCursorVisible())
     SetCursorOnAllRootWindows(GetCurrentCursor());
 }
 
 void CursorManager::SetCursorVisibility(bool visible) {
-  current_state_->SetVisible(visible);
+  CursorController::SetCursorVisibility(visible);
 
   if (visible) {
     SetCursorInternal(GetCurrentCursor());
   } else {
     gfx::NativeCursor invisible_cursor(ui::kCursorNone);
     image_cursors_->SetPlatformCursor(&invisible_cursor);
     SetCursorOnAllRootWindows(invisible_cursor);
   }
 
   NotifyCursorVisibilityChange(visible);
 }
 
 void CursorManager::SetMouseEventsEnabled(bool enabled) {
-  current_state_->SetMouseEventsEnabled(enabled);
+  CursorController::SetMouseEventsEnabled(enabled);
 
   if (enabled) {
     aura::Env::GetInstance()->set_last_mouse_location(
         disabled_cursor_location_);
   } else {
     disabled_cursor_location_ = aura::Env::GetInstance()->last_mouse_location();
     aura::Env::GetInstance()->set_last_mouse_location(
         gfx::Point(kDisabledCursorLocationX, kDisabledCursorLocationY));
   }
 
-  SetCursorVisibility(current_state_->visible());
+  SetCursorVisibility(IsCursorVisible());
   NotifyMouseEventsEnableStateChange(enabled);
 }
 
-gfx::NativeCursor CursorManager::GetCurrentCursor() const {
-  return current_state_->cursor();
-}
-
 }  // namespace ash