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// Copyright 2014 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 <map>
#include <memory>
#include <set>
#include <vector>
#include "base/callback.h"
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "chrome/browser/installable/installable_metrics.h"
#include "chrome/common/web_application_info.h"
#include "content/public/browser/notification_observer.h"
#include "content/public/browser/notification_registrar.h"
#include "content/public/common/manifest.h"
class ExtensionService;
class FaviconDownloader;
struct InstallableData;
class InstallableManager;
class Profile;
class SkBitmap;
namespace content {
class BrowserContext;
class WebContents;
namespace extensions {
class CrxInstaller;
class Extension;
// A helper class for creating bookmark apps from a WebContents.
class BookmarkAppHelper : public content::NotificationObserver {
struct BitmapAndSource {
BitmapAndSource(const GURL& source_url_p, const SkBitmap& bitmap_p);
GURL source_url;
SkBitmap bitmap;
typedef base::Callback<void(const Extension*, const WebApplicationInfo&)>
// This helper class will create a bookmark app out of |web_app_info| and
// install it to |service|. Icons will be downloaded from the URLs in
// |web_app_info.icons| using |contents| if |contents| is not NULL.
// All existing icons from WebApplicationInfo will also be used. The user
// will then be prompted to edit the creation information via a bubble and
// will have a chance to cancel the operation.
// |install_source| indicates how the installation was triggered.
BookmarkAppHelper(Profile* profile,
WebApplicationInfo web_app_info,
content::WebContents* contents,
WebappInstallSource install_source);
~BookmarkAppHelper() override;
// Update the given WebApplicationInfo with information from the manifest.
static void UpdateWebAppInfoFromManifest(const content::Manifest& manifest,
WebApplicationInfo* web_app_info);
// This finds the closest not-smaller bitmap in |bitmaps| for each size in
// |sizes| and resizes it to that size. This returns a map of sizes to bitmaps
// which contains only bitmaps of a size in |sizes| and at most one bitmap of
// each size.
static std::map<int, BitmapAndSource> ConstrainBitmapsToSizes(
const std::vector<BitmapAndSource>& bitmaps,
const std::set<int>& sizes);
// Adds a square container icon of |output_size| and 2 * |output_size| pixels
// to |bitmaps| by drawing the given |letter| into a rounded background of
// |color|. For each size, if an icon of the requested size already exists in
// |bitmaps|, nothing will happen.
static void GenerateIcon(std::map<int, BitmapAndSource>* bitmaps,
int output_size,
SkColor color,
char letter);
// Returns true if a bookmark or hosted app from a given URL is already
// installed and enabled.
static bool BookmarkOrHostedAppInstalled(
content::BrowserContext* browser_context, const GURL& url);
// Resize icons to the accepted sizes, and generate any that are missing. Does
// not update |web_app_info| except to update |generated_icon_color|.
static std::map<int, BitmapAndSource> ResizeIconsAndGenerateMissing(
std::vector<BitmapAndSource> icons,
std::set<int> sizes_to_generate,
WebApplicationInfo* web_app_info);
// It is important that the linked app information in any extension that
// gets created from sync matches the linked app information that came from
// sync. If there are any changes, they will be synced back to other devices
// and could potentially create a never ending sync cycle.
// This function updates |web_app_info| with the image data of any icon from
// |bitmap_map| that has a URL and size matching that in |web_app_info|, as
// well as adding any new images from |bitmap_map| that have no URL.
static void UpdateWebAppIconsWithoutChangingLinks(
std::map<int, BookmarkAppHelper::BitmapAndSource> bitmap_map,
WebApplicationInfo* web_app_info);
// Begins the asynchronous bookmark app creation.
void Create(const CreateBookmarkAppCallback& callback);
// Protected methods for testing.
// Called by the InstallableManager when the installability check is
// completed.
void OnDidPerformInstallableCheck(const InstallableData& data);
// Performs post icon download tasks including installing the bookmark app.
virtual void OnIconsDownloaded(
bool success,
const std::map<GURL, std::vector<SkBitmap>>& bitmaps);
// Downloads icons from the given WebApplicationInfo using the given
// WebContents.
std::unique_ptr<FaviconDownloader> favicon_downloader_;
enum Installable {
// Called after the bubble has been shown, and the user has either accepted or
// the dialog was dismissed.
void OnBubbleCompleted(bool user_accepted,
const WebApplicationInfo& web_app_info);
// Called when the installation of the app is complete to perform the final
// installation steps.
void FinishInstallation(const Extension* extension);
// Overridden from content::NotificationObserver:
void Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) override;
// The profile that the bookmark app is being added to.
Profile* profile_;
// The web contents that the bookmark app is being created for.
content::WebContents* contents_;
// The WebApplicationInfo that the bookmark app is being created for.
WebApplicationInfo web_app_info_;
// Called on app creation or failure.
CreateBookmarkAppCallback callback_;
// Used to install the created bookmark app.
scoped_refptr<extensions::CrxInstaller> crx_installer_;
content::NotificationRegistrar registrar_;
InstallableManager* installable_manager_;
Installable installable_ = INSTALLABLE_UNKNOWN;
// The mechanism via which the app creation was triggered.
WebappInstallSource install_source_;
// With fast tab unloading enabled, shutting down can cause BookmarkAppHelper
// to be destroyed before the bookmark creation bubble. Use weak pointers to
// prevent a heap-use-after free in this instance (
base::WeakPtrFactory<BookmarkAppHelper> weak_factory_;
// Creates or updates a bookmark app from the given |web_app_info|. Icons will
// be downloaded from the icon URLs provided in |web_app_info|.
void CreateOrUpdateBookmarkApp(ExtensionService* service,
WebApplicationInfo* web_app_info);
// Returns whether the given |url| is a valid bookmark app url.
bool IsValidBookmarkAppUrl(const GURL& url);
} // namespace extensions