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// Copyright 2013 The Chromium Authors
// 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/public/cpp/shelf_model.h"
#include "ash/public/cpp/shell_window_ids.h"
#include "ash/public/cpp/window_properties.h"
#include "ash/shelf/shelf_window_watcher_item_delegate.h"
#include "ash/shell.h"
#include "ash/wm/desks/desks_util.h"
#include "ash/wm/window_util.h"
#include "base/strings/string_util.h"
#include "ui/aura/client/aura_constants.h"
#include "ui/base/resource/resource_bundle.h"
#include "ui/display/types/display_constants.h"
#include "ui/resources/grit/ui_resources.h"
#include "ui/wm/public/activation_client.h"
namespace ash {
namespace {
// Returns the window's shelf item type property value.
ShelfItemType GetShelfItemType(aura::Window* window) {
return static_cast<ShelfItemType>(window->GetProperty(kShelfItemTypeKey));
}
// Returns the window's shelf id property value.
ShelfID GetShelfID(aura::Window* window) {
return ShelfID::Deserialize(window->GetProperty(kShelfIDKey));
}
// Update the ShelfItem from relevant window properties.
void UpdateShelfItemForWindow(ShelfItem* item, aura::Window* window) {
DCHECK(item->id.IsNull() || item->id == GetShelfID(window));
item->id = GetShelfID(window);
item->type = GetShelfItemType(window);
item->title = window->GetTitle();
// Active windows don't draw attention because the user is looking at them.
if (window->GetProperty(aura::client::kDrawAttentionKey) &&
!wm::IsActiveWindow(window)) {
item->status = STATUS_ATTENTION;
} else {
item->status = STATUS_RUNNING;
}
// Prefer app icons over window icons, they're typically larger.
gfx::ImageSkia* image = window->GetProperty(aura::client::kAppIconKey);
if (!image || image->isNull())
image = window->GetProperty(aura::client::kWindowIconKey);
if (!image || image->isNull()) {
ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
item->image = rb.GetImageNamed(IDR_DEFAULT_FAVICON_32).AsImageSkia();
} else {
item->image = *image;
}
}
} // namespace
ShelfWindowWatcher::ContainerWindowObserver::ContainerWindowObserver(
ShelfWindowWatcher* window_watcher)
: window_watcher_(window_watcher) {}
ShelfWindowWatcher::ContainerWindowObserver::~ContainerWindowObserver() =
default;
void ShelfWindowWatcher::ContainerWindowObserver::OnWindowAdded(
aura::Window* new_window) {
DCHECK(new_window);
DCHECK(new_window->parent());
DCHECK(desks_util::IsDeskContainer(new_window->parent()));
window_watcher_->OnUserWindowAdded(new_window);
}
void ShelfWindowWatcher::ContainerWindowObserver::OnWindowDestroying(
aura::Window* window) {
window_watcher_->OnContainerWindowDestroying(window);
}
////////////////////////////////////////////////////////////////////////////////
ShelfWindowWatcher::UserWindowObserver::UserWindowObserver(
ShelfWindowWatcher* window_watcher)
: window_watcher_(window_watcher) {}
ShelfWindowWatcher::UserWindowObserver::~UserWindowObserver() = default;
void ShelfWindowWatcher::UserWindowObserver::OnWindowPropertyChanged(
aura::Window* window,
const void* key,
intptr_t old) {
if (key == kShelfIDKey && window == window_util::GetActiveWindow()) {
window_watcher_->model_->SetActiveShelfID(
ShelfID::Deserialize(window->GetProperty(kShelfIDKey)));
}
if (key == aura::client::kAppIconKey || key == aura::client::kWindowIconKey ||
key == aura::client::kDrawAttentionKey || key == kShelfItemTypeKey ||
key == kShelfIDKey) {
window_watcher_->OnUserWindowPropertyChanged(window);
}
}
void ShelfWindowWatcher::UserWindowObserver::OnWindowDestroying(
aura::Window* window) {
window_watcher_->OnUserWindowDestroying(window);
}
void ShelfWindowWatcher::UserWindowObserver::OnWindowVisibilityChanged(
aura::Window* window,
bool visible) {
// This is also called for descendants; check that the window is observed.
if (window_watcher_->observed_user_windows_.IsObservingSource(window))
window_watcher_->OnUserWindowPropertyChanged(window);
}
void ShelfWindowWatcher::UserWindowObserver::OnWindowTitleChanged(
aura::Window* window) {
window_watcher_->OnUserWindowPropertyChanged(window);
}
////////////////////////////////////////////////////////////////////////////////
ShelfWindowWatcher::ShelfWindowWatcher(ShelfModel* model)
: model_(model),
observed_container_windows_(&container_window_observer_),
observed_user_windows_(&user_window_observer_) {
Shell::Get()->activation_client()->AddObserver(this);
Shell::Get()->AddShellObserver(this);
for (aura::Window* window : Shell::GetAllRootWindows())
OnRootWindowAdded(window);
}
ShelfWindowWatcher::~ShelfWindowWatcher() {
Shell::Get()->RemoveShellObserver(this);
Shell::Get()->activation_client()->RemoveObserver(this);
}
void ShelfWindowWatcher::AddShelfItem(aura::Window* window) {
user_windows_with_items_.insert(window);
ShelfItem item;
UpdateShelfItemForWindow(&item, window);
model_->AddAt(
model_->item_count(), item,
std::make_unique<ShelfWindowWatcherItemDelegate>(item.id, window));
}
void ShelfWindowWatcher::RemoveShelfItem(aura::Window* window) {
user_windows_with_items_.erase(window);
const ShelfID shelf_id = GetShelfID(window);
DCHECK(!shelf_id.IsNull());
const int index = model_->ItemIndexByID(shelf_id);
DCHECK_GE(index, 0);
model_->RemoveItemAt(index);
}
void ShelfWindowWatcher::OnContainerWindowDestroying(aura::Window* container) {
observed_container_windows_.RemoveObservation(container);
}
void ShelfWindowWatcher::OnUserWindowAdded(aura::Window* window) {
// The window may already be tracked from a prior display or parent container.
if (observed_user_windows_.IsObservingSource(window))
return;
observed_user_windows_.AddObservation(window);
// Add, update, or remove a ShelfItem for |window|, as needed.
OnUserWindowPropertyChanged(window);
}
void ShelfWindowWatcher::OnUserWindowDestroying(aura::Window* window) {
if (observed_user_windows_.IsObservingSource(window))
observed_user_windows_.RemoveObservation(window);
if (user_windows_with_items_.count(window) > 0)
RemoveShelfItem(window);
DCHECK_EQ(0u, user_windows_with_items_.count(window));
}
void ShelfWindowWatcher::OnUserWindowPropertyChanged(aura::Window* window) {
// ShelfWindowWatcher only handles dialogs for now, all other shelf item
// types are handled by ChromeShelfController.
const ShelfItemType item_type = GetShelfItemType(window);
if (item_type != TYPE_DIALOG || GetShelfID(window).IsNull()) {
// Remove |window|'s ShelfItem if it was added by ShelfWindowWatcher.
if (user_windows_with_items_.count(window) > 0)
RemoveShelfItem(window);
return;
}
// Update an existing ShelfWindowWatcher item when a window property changes.
int index = model_->ItemIndexByID(GetShelfID(window));
if (index >= 0 && user_windows_with_items_.count(window) > 0) {
ShelfItem item = model_->items()[index];
UpdateShelfItemForWindow(&item, window);
model_->Set(index, item);
return;
}
// Create a new item for |window|, if it is visible.
if (index < 0 && window->IsVisible())
AddShelfItem(window);
}
void ShelfWindowWatcher::OnWindowActivated(ActivationReason reason,
aura::Window* gained_active,
aura::Window* lost_active) {
if (gained_active && user_windows_with_items_.count(gained_active) > 0)
OnUserWindowPropertyChanged(gained_active);
if (lost_active && user_windows_with_items_.count(lost_active) > 0)
OnUserWindowPropertyChanged(lost_active);
model_->SetActiveShelfID(gained_active ? GetShelfID(gained_active)
: ShelfID());
}
void ShelfWindowWatcher::OnRootWindowAdded(aura::Window* root_window) {
for (aura::Window* container : desks_util::GetDesksContainers(root_window)) {
for (aura::Window* window : container->children())
OnUserWindowAdded(window);
observed_container_windows_.AddObservation(container);
}
}
} // namespace ash
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