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// Copyright 2021 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/app_list/model/app_icon_load_helper.h"
#include <algorithm>
#include <utility>
#include "ash/app_list/model/folder_image.h"
#include "base/check.h"
#include "base/memory/raw_ptr.h"
namespace ash {
// AppIconLoadHelper::AppItemHelper
class AppIconLoadHelper::AppItemHelper : public AppListItemObserver {
public:
AppItemHelper(AppListItem* app_item, IconLoadCallback icon_load_callback);
AppItemHelper(const AppItemHelper&) = delete;
AppItemHelper& operator=(const AppItemHelper&) = delete;
~AppItemHelper() override;
// AppListItemObserver:
void ItemIconVersionChanged() override;
void ItemBeingDestroyed() override;
const AppListItem* app_item() const { return app_item_; }
private:
raw_ptr<AppListItem> app_item_ = nullptr;
IconLoadCallback icon_load_callback_;
base::ScopedObservation<AppListItem, AppListItemObserver>
app_item_observeration_{this};
};
AppIconLoadHelper::AppItemHelper::AppItemHelper(
AppListItem* app_item,
IconLoadCallback icon_load_callback)
: app_item_(app_item), icon_load_callback_(std::move(icon_load_callback)) {
DCHECK(!icon_load_callback_.is_null());
app_item_observeration_.Observe(app_item_.get());
if (app_item_->GetDefaultIcon().isNull())
icon_load_callback_.Run(app_item_->id());
}
AppIconLoadHelper::AppItemHelper::~AppItemHelper() = default;
void AppIconLoadHelper::AppItemHelper::ItemIconVersionChanged() {
icon_load_callback_.Run(app_item_->id());
}
void AppIconLoadHelper::AppItemHelper::ItemBeingDestroyed() {
app_item_ = nullptr;
app_item_observeration_.Reset();
}
// AppIconLoadHelper::AppItemListHelper
class AppIconLoadHelper::AppItemListHelper : public AppListItemListObserver {
public:
AppItemListHelper(AppListItemList* list, IconLoadCallback icon_load_callback);
AppItemListHelper(const AppItemListHelper&) = delete;
AppItemListHelper& operator=(const AppItemListHelper&) = delete;
~AppItemListHelper() override;
// AppListItemListObserver:
void OnListItemAdded(size_t index, AppListItem* item) override;
void OnListItemRemoved(size_t index, AppListItem* item) override;
void OnListItemMoved(size_t from_index,
size_t to_index,
AppListItem* item) override;
private:
using AppItemHelper = AppIconLoadHelper::AppItemHelper;
void UpdateHelper();
const raw_ptr<AppListItemList> list_;
IconLoadCallback icon_load_callback_;
base::ScopedObservation<AppListItemList, AppListItemListObserver>
list_observeration_{this};
std::vector<std::unique_ptr<AppItemHelper>> icon_helpers_;
};
AppIconLoadHelper::AppItemListHelper::AppItemListHelper(
AppListItemList* list,
IconLoadCallback icon_load_callback)
: list_(list), icon_load_callback_(std::move(icon_load_callback)) {
DCHECK(!icon_load_callback_.is_null());
list_observeration_.Observe(list_.get());
UpdateHelper();
}
AppIconLoadHelper::AppItemListHelper::~AppItemListHelper() = default;
void AppIconLoadHelper::AppItemListHelper::OnListItemAdded(size_t index,
AppListItem* item) {
if (index < FolderImage::kNumFolderTopItems)
UpdateHelper();
}
void AppIconLoadHelper::AppItemListHelper::OnListItemRemoved(
size_t index,
AppListItem* item) {
if (index < FolderImage::kNumFolderTopItems)
UpdateHelper();
}
void AppIconLoadHelper::AppItemListHelper::OnListItemMoved(size_t from_index,
size_t to_index,
AppListItem* item) {
if (from_index < FolderImage::kNumFolderTopItems ||
to_index < FolderImage::kNumFolderTopItems) {
UpdateHelper();
}
}
void AppIconLoadHelper::AppItemListHelper::UpdateHelper() {
icon_helpers_.clear();
const size_t count =
std::min(FolderImage::kNumFolderTopItems, list_->item_count());
for (size_t i = 0; i < count; ++i) {
AppListItem* app_item = list_->item_at(i);
icon_helpers_.emplace_back(
std::make_unique<AppItemHelper>(app_item, icon_load_callback_));
}
}
// AppIconLoadHelper
AppIconLoadHelper::AppIconLoadHelper(AppListItem* app_item,
IconLoadCallback icon_load_callback)
: item_helper_(
std::make_unique<AppItemHelper>(app_item,
std::move(icon_load_callback))) {}
AppIconLoadHelper::AppIconLoadHelper(AppListItemList* list,
IconLoadCallback icon_load_callback)
: list_helper_(
std::make_unique<AppItemListHelper>(list,
std::move(icon_load_callback))) {}
AppIconLoadHelper::~AppIconLoadHelper() = default;
} // namespace ash
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