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

ash/wm/ash_native_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/ash_native_cursor_manager.h"
+
+#include "ash/shell.h"
+#include "ash/wm/image_cursors.h"
+#include "base/logging.h"
+#include "ui/aura/env.h"
+#include "ui/aura/root_window.h"
+#include "ui/base/cursor/cursor.h"
+
+namespace  {
+
+// The coordinate of the cursor used when the mouse events are disabled.
+const int kDisabledCursorLocationX = -10000;
+const int kDisabledCursorLocationY = -10000;
+
+void SetCursorOnAllRootWindows(gfx::NativeCursor cursor) {
+  ash::Shell::RootWindowList root_windows =
+      ash::Shell::GetInstance()->GetAllRootWindows();
+  for (ash::Shell::RootWindowList::iterator iter = root_windows.begin();
+       iter != root_windows.end(); ++iter)
+    (*iter)->SetCursor(cursor);
+}
+
+void NotifyCursorVisibilityChange(bool visible) {
+  ash::Shell::RootWindowList root_windows =
+      ash::Shell::GetInstance()->GetAllRootWindows();
+  for (ash::Shell::RootWindowList::iterator iter = root_windows.begin();
+       iter != root_windows.end(); ++iter)
+    (*iter)->OnCursorVisibilityChanged(visible);
+}
+
+void NotifyMouseEventsEnableStateChange(bool enabled) {
+  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 {
+
+AshNativeCursorManager::AshNativeCursorManager()
+    : image_cursors_(new ImageCursors) {
+}
+
+AshNativeCursorManager::~AshNativeCursorManager() {
+}
+
+void AshNativeCursorManager::SetDeviceScaleFactor(
+    float device_scale_factor,
+    views::corewm::NativeCursorManagerDelegate* delegate) {
+  if (image_cursors_->SetDeviceScaleFactor(device_scale_factor))
+    SetCursor(delegate->GetCurrentCursor(), delegate);
+}
+
+void AshNativeCursorManager::SetCursor(
+    gfx::NativeCursor cursor,
+    views::corewm::NativeCursorManagerDelegate* delegate) {
+  gfx::NativeCursor new_cursor = cursor;
+  image_cursors_->SetPlatformCursor(&new_cursor);
+  new_cursor.set_device_scale_factor(image_cursors_->GetDeviceScaleFactor());
+
+  delegate->CommitCursor(new_cursor);
+
+  if (delegate->GetCurrentVisibility())
+    SetCursorOnAllRootWindows(new_cursor);
+}
+
+void AshNativeCursorManager::SetVisibility(
+    bool visible,
+    views::corewm::NativeCursorManagerDelegate* delegate) {
+  delegate->CommitVisibility(visible);
+
+  if (visible) {
+    SetCursor(delegate->GetCurrentCursor(), delegate);
+  } else {
+    gfx::NativeCursor invisible_cursor(ui::kCursorNone);
+    image_cursors_->SetPlatformCursor(&invisible_cursor);
+    SetCursorOnAllRootWindows(invisible_cursor);
+  }
+
+  NotifyCursorVisibilityChange(visible);
+}
+
+void AshNativeCursorManager::SetMouseEventsEnabled(
+    bool enabled,
+    views::corewm::NativeCursorManagerDelegate* delegate) {
+  delegate->CommitMouseEventsEnabled(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));
+  }
+
+  SetVisibility(delegate->GetCurrentVisibility(), delegate);
+  NotifyMouseEventsEnableStateChange(enabled);
+}
+
+}  // namespace ash