mash: Move ShelfWindowWatcher[ItemDelegate] to ash/common.

ash/shelf/shelf_window_watcher.cc

-// Copyright 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 "ash/shelf/shelf_window_watcher.h"
-
-#include <memory>
-#include <utility>
-
-#include "ash/common/shelf/shelf_constants.h"
-#include "ash/common/shelf/shelf_model.h"
-#include "ash/common/shell_window_ids.h"
-#include "ash/common/wm/window_state.h"
-#include "ash/common/wm_shell.h"
-#include "ash/common/wm_window.h"
-#include "ash/common/wm_window_property.h"
-#include "ash/shelf/shelf_window_watcher_item_delegate.h"
-#include "ui/base/resource/resource_bundle.h"
-#include "ui/display/display.h"
-#include "ui/display/screen.h"
-#include "ui/gfx/image/image_skia.h"
-
-namespace ash {
-namespace {
-
-// Sets ShelfItem property by using the value of |details|.
-void SetShelfItemDetailsForShelfItem(ash::ShelfItem* item,
-                                     const ash::ShelfItemDetails& details) {
-  item->type = details.type;
-  if (details.image_resource_id != ash::kInvalidImageResourceID) {
-    ResourceBundle& rb = ResourceBundle::GetSharedInstance();
-    item->image = *rb.GetImageSkiaNamed(details.image_resource_id);
-  }
-}
-
-// Returns true if |window| has a ShelfItem added by ShelfWindowWatcher.
-bool HasShelfItemForWindow(WmWindow* window) {
-  return window->GetShelfItemDetails() &&
-         window->GetIntProperty(WmWindowProperty::SHELF_ID) != kInvalidShelfID;
-}
-
-}  // namespace
-
-ShelfWindowWatcher::ContainerWindowObserver::ContainerWindowObserver(
-    ShelfWindowWatcher* window_watcher)
-    : window_watcher_(window_watcher) {}
-
-ShelfWindowWatcher::ContainerWindowObserver::~ContainerWindowObserver() {}
-
-void ShelfWindowWatcher::ContainerWindowObserver::OnWindowTreeChanged(
-    WmWindow* window,
-    const TreeChangeParams& params) {
-  if (!params.old_parent && params.new_parent &&
-      params.new_parent->GetShellWindowId() ==
-          kShellWindowId_DefaultContainer) {
-    // A new window was created in the default container.
-    window_watcher_->OnUserWindowAdded(params.target);
-  }
-}
-
-void ShelfWindowWatcher::ContainerWindowObserver::OnWindowDestroying(
-    WmWindow* window) {
-  window_watcher_->OnContainerWindowDestroying(window);
-}
-
-////////////////////////////////////////////////////////////////////////////////
-
-ShelfWindowWatcher::UserWindowObserver::UserWindowObserver(
-    ShelfWindowWatcher* window_watcher)
-    : window_watcher_(window_watcher) {}
-
-ShelfWindowWatcher::UserWindowObserver::~UserWindowObserver() {}
-
-void ShelfWindowWatcher::UserWindowObserver::OnWindowPropertyChanged(
-    WmWindow* window,
-    WmWindowProperty property) {
-  if (property == WmWindowProperty::SHELF_ITEM_DETAILS)
-    window_watcher_->OnUserWindowShelfItemDetailsChanged(window);
-}
-
-void ShelfWindowWatcher::UserWindowObserver::OnWindowDestroying(
-    WmWindow* window) {
-  window_watcher_->OnUserWindowDestroying(window);
-}
-
-////////////////////////////////////////////////////////////////////////////////
-
-ShelfWindowWatcher::ShelfWindowWatcher(ShelfModel* model)
-    : model_(model),
-      container_window_observer_(this),
-      user_window_observer_(this),
-      observed_container_windows_(&container_window_observer_),
-      observed_user_windows_(&user_window_observer_) {
-  WmShell::Get()->AddActivationObserver(this);
-  for (WmWindow* root : WmShell::Get()->GetAllRootWindows()) {
-    observed_container_windows_.Add(
-        root->GetChildByShellWindowId(kShellWindowId_DefaultContainer));
-  }
-
-  display::Screen::GetScreen()->AddObserver(this);
-}
-
-ShelfWindowWatcher::~ShelfWindowWatcher() {
-  display::Screen::GetScreen()->RemoveObserver(this);
-  WmShell::Get()->RemoveActivationObserver(this);
-}
-
-void ShelfWindowWatcher::AddShelfItem(WmWindow* window) {
-  const ShelfItemDetails* item_details = window->GetShelfItemDetails();
-  ShelfItem item;
-  ShelfID id = model_->next_id();
-  item.status = window->IsActive() ? STATUS_ACTIVE : STATUS_RUNNING;
-  SetShelfItemDetailsForShelfItem(&item, *item_details);
-  window->SetIntProperty(WmWindowProperty::SHELF_ID, id);
-  std::unique_ptr<ShelfItemDelegate> item_delegate(
-      new ShelfWindowWatcherItemDelegate(window));
-  model_->SetShelfItemDelegate(id, std::move(item_delegate));
-  model_->Add(item);
-}
-
-void ShelfWindowWatcher::RemoveShelfItem(WmWindow* window) {
-  int shelf_id = window->GetIntProperty(WmWindowProperty::SHELF_ID);
-  DCHECK_NE(shelf_id, kInvalidShelfID);
-  int index = model_->ItemIndexByID(shelf_id);
-  DCHECK_GE(index, 0);
-  model_->RemoveItemAt(index);
-  window->SetIntProperty(WmWindowProperty::SHELF_ID, kInvalidShelfID);
-}
-
-void ShelfWindowWatcher::OnContainerWindowDestroying(WmWindow* container) {
-  observed_container_windows_.Remove(container);
-}
-
-void ShelfWindowWatcher::UpdateShelfItemStatus(WmWindow* window,
-                                               bool is_active) {
-  int index = GetShelfItemIndexForWindow(window);
-  DCHECK_GE(index, 0);
-
-  ShelfItem item = model_->items()[index];
-  item.status = is_active ? STATUS_ACTIVE : STATUS_RUNNING;
-  model_->Set(index, item);
-}
-
-int ShelfWindowWatcher::GetShelfItemIndexForWindow(WmWindow* window) const {
-  return model_->ItemIndexByID(
-      window->GetIntProperty(WmWindowProperty::SHELF_ID));
-}
-
-void ShelfWindowWatcher::OnUserWindowAdded(WmWindow* window) {
-  // The window may already be tracked from when it was added to a different
-  // display or because an existing window added ShelfItemDetails to itself.
-  if (observed_user_windows_.IsObserving(window))
-    return;
-
-  observed_user_windows_.Add(window);
-
-  // Add ShelfItem if |window| already has a ShelfItemDetails when it is
-  // created.
-  if (window->GetShelfItemDetails() &&
-      window->GetIntProperty(WmWindowProperty::SHELF_ID) == kInvalidShelfID) {
-    AddShelfItem(window);
-  }
-}
-
-void ShelfWindowWatcher::OnUserWindowDestroying(WmWindow* window) {
-  if (observed_user_windows_.IsObserving(window))
-    observed_user_windows_.Remove(window);
-
-  if (HasShelfItemForWindow(window))
-    RemoveShelfItem(window);
-}
-
-void ShelfWindowWatcher::OnUserWindowShelfItemDetailsChanged(WmWindow* window) {
-  if (!window->GetShelfItemDetails()) {
-    // Removes ShelfItem for |window| when it has a ShelfItem.
-    if (window->GetIntProperty(WmWindowProperty::SHELF_ID) != kInvalidShelfID)
-      RemoveShelfItem(window);
-    return;
-  }
-
-  // When ShelfItemDetails is changed, update ShelfItem.
-  if (HasShelfItemForWindow(window)) {
-    int index = GetShelfItemIndexForWindow(window);
-    DCHECK_GE(index, 0);
-    ShelfItem item = model_->items()[index];
-    const ShelfItemDetails* details = window->GetShelfItemDetails();
-    SetShelfItemDetailsForShelfItem(&item, *details);
-    model_->Set(index, item);
-    return;
-  }
-
-  // Creates a new ShelfItem for |window|.
-  AddShelfItem(window);
-}
-
-void ShelfWindowWatcher::OnWindowActivated(WmWindow* gained_active,
-                                           WmWindow* lost_active) {
-  if (gained_active && HasShelfItemForWindow(gained_active))
-    UpdateShelfItemStatus(gained_active, true);
-  if (lost_active && HasShelfItemForWindow(lost_active))
-    UpdateShelfItemStatus(lost_active, false);
-}
-
-void ShelfWindowWatcher::OnDisplayAdded(const display::Display& new_display) {
-  WmWindow* root = WmShell::Get()->GetRootWindowForDisplayId(new_display.id());
-
-  // When the primary root window's display get removed, the existing root
-  // window is taken over by the new display and the observer is already set.
-  WmWindow* container =
-      root->GetChildByShellWindowId(kShellWindowId_DefaultContainer);
-  if (!observed_container_windows_.IsObserving(container))
-    observed_container_windows_.Add(container);
-}
-
-void ShelfWindowWatcher::OnDisplayRemoved(const display::Display& old_display) {
-}
-
-void ShelfWindowWatcher::OnDisplayMetricsChanged(const display::Display&,
-                                                 uint32_t) {}
-
-}  // namespace ash