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// Copyright 2017 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.
#ifndef CHROME_BROWSER_EXTENSIONS_CHROME_APP_ICON_SERVICE_H_
#define CHROME_BROWSER_EXTENSIONS_CHROME_APP_ICON_SERVICE_H_
#include <map>
#include <memory>
#include <set>
#include "base/callback.h"
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "base/scoped_observer.h"
#include "components/keyed_service/core/keyed_service.h"
#include "extensions/browser/extension_registry_observer.h"
#if defined(OS_CHROMEOS)
#include "chrome/browser/ui/ash/launcher/launcher_extension_app_updater.h"
#endif
namespace content {
class BrowserContext;
}
namespace gfx {
class ImageSkia;
class Size;
} // namespace gfx
namespace extensions {
class ChromeAppIcon;
class ChromeAppIconDelegate;
// Factory for ChromeAppIcon. Each created icon is tracked by this service.
// Once some condition that affects how extension app icon should look is
// changed then corresponded app icons are automatically updated. This service
// is bound to content::BrowserContext.
// Usage: ChromeAppIconService::Get(context)->CreateIcon().
class ChromeAppIconService : public KeyedService,
#if defined(OS_CHROMEOS)
public LauncherAppUpdater::Delegate,
#endif
public ExtensionRegistryObserver {
public:
using ResizeFunction =
base::RepeatingCallback<void(const gfx::Size&, gfx::ImageSkia*)>;
explicit ChromeAppIconService(content::BrowserContext* context);
~ChromeAppIconService() override;
// Convenience function to get the ChromeAppIconService for a
// BrowserContext.
static ChromeAppIconService* Get(content::BrowserContext* context);
// Creates extension app icon for requested app and size. Icon updates are
// dispatched via |delegate|.
// |resize_function| overrides icon resizing behavior if non-null. Otherwise
// IconLoader with perform the resizing. In both cases |resource_size_in_dip|
// is used to pick the correct icon representation from resources.
std::unique_ptr<ChromeAppIcon> CreateIcon(
ChromeAppIconDelegate* delegate,
const std::string& app_id,
int resource_size_in_dip,
const ResizeFunction& resize_function);
std::unique_ptr<ChromeAppIcon> CreateIcon(ChromeAppIconDelegate* delegate,
const std::string& app_id,
int resource_size_in_dip);
// KeyedService:
void Shutdown() override;
private:
class Updater;
// System may have multiple icons for the same app id with different
// dimensions. For example icon in shelf and app launcher.
using IconMap = std::map<std::string, std::set<ChromeAppIcon*>>;
// Called from ChromeAppIcon DTOR.
void OnIconDestroyed(ChromeAppIcon* icon);
// Called from Updater when corresponded app icons need to be updated.
void OnAppUpdated(const std::string& app_id);
// ExtensionRegistryObserver:
void OnExtensionLoaded(content::BrowserContext* browser_context,
const Extension* extension) override;
void OnExtensionUnloaded(content::BrowserContext* browser_context,
const Extension* extension,
UnloadedExtensionReason reason) override;
#if defined(OS_CHROMEOS)
// LauncherAppUpdater::Delegate:
void OnAppUpdated(content::BrowserContext* browser_context,
const std::string& app_id) override;
#endif
// Unowned pointer.
content::BrowserContext* context_;
#if defined(OS_CHROMEOS)
// On Chrome OS this handles Chrome app life-cycle events that may change how
// extension based app icon looks like.
std::unique_ptr<LauncherExtensionAppUpdater> app_updater_;
#endif
// Deletes the icon set for |app_id| from the map if it is empty.
void MaybeCleanupIconSet(const std::string& app_id);
IconMap icon_map_;
ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver> observer_;
base::WeakPtrFactory<ChromeAppIconService> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(ChromeAppIconService);
};
} // namespace extensions
#endif // CHROME_BROWSER_EXTENSIONS_CHROME_APP_ICON_SERVICE_H_
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