Fetch notification action icons and pass them through in resources.

content/child/notifications/pending_notifications_tracker.cc

 // Copyright 2015 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 "content/child/notifications/pending_notifications_tracker.h"
 
 #include "base/bind.h"
-#include "base/location.h"
-#include "base/thread_task_runner_handle.h"
-#include "content/child/notifications/notification_image_loader.h"
+#include "base/bind_helpers.h"
+#include "base/callback.h"
+#include "base/memory/scoped_ptr.h"
+#include "content/child/notifications/pending_notification.h"
 #include "content/public/common/notification_resources.h"
-#include "third_party/WebKit/public/platform/modules/notifications/WebNotificationData.h"
-#include "third_party/skia/include/core/SkBitmap.h"
 
 namespace content {
 
-// Stores the information associated with a pending notification.
-struct PendingNotificationsTracker::PendingNotification {
-  PendingNotification(
-      const scoped_refptr<NotificationImageLoader>& image_loader,
-      const NotificationResourcesFetchedCallback& callback)
-      : image_loader(image_loader), callback(callback) {}
-
-  scoped_refptr<NotificationImageLoader> image_loader;
-  NotificationResourcesFetchedCallback callback;
-};
-
 PendingNotificationsTracker::PendingNotificationsTracker(
-    scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner)
-    : main_thread_task_runner_(main_thread_task_runner), weak_factory_(this) {}
+    const scoped_refptr<base::SingleThreadTaskRunner>& main_task_runner)
+    : next_notification_id_(0), main_task_runner_(main_task_runner) {}
 
 PendingNotificationsTracker::~PendingNotificationsTracker() {}
 
-void PendingNotificationsTracker::FetchPageNotificationResources(
+void PendingNotificationsTracker::FetchResources(
     const blink::WebNotificationData& notification_data,
     blink::WebNotificationDelegate* delegate,
-    const NotificationResourcesFetchedCallback& callback) {
-  delegate_to_pending_id_map_[delegate] = FetchNotificationResources(
-      notification_data, callback,
-      new NotificationImageLoader(
-          base::Bind(&PendingNotificationsTracker::DidFetchPageNotification,
-                     weak_factory_.GetWeakPtr(), delegate),
-          base::ThreadTaskRunnerHandle::Get()));
+    const ResourcesCallback& resources_callback) {
+  int32_t notification_id = next_notification_id_++;
+
+  if (delegate)
+    delegate_to_pending_id_map_[delegate] = notification_id;
+
+  base::Closure fetches_finished_callback = base::Bind(
+      &PendingNotificationsTracker::FetchesFinished,
+      base::Unretained(this) /* The pending notifications are owned by this. */,
+      delegate, notification_id, resources_callback);
+
+  scoped_ptr<PendingNotification> pending_notification(
+      new PendingNotification(main_task_runner_));
+  pending_notification->FetchResources(notification_data,
+                                       fetches_finished_callback);
+
+  pending_notifications_.AddWithID(pending_notification.release(),
+                                   notification_id);
 }
 
-void PendingNotificationsTracker::FetchPersistentNotificationResources(
-    const blink::WebNotificationData& notification_data,
-    const NotificationResourcesFetchedCallback& callback) {
-  FetchNotificationResources(
-      notification_data, callback,
-      new NotificationImageLoader(
-          base::Bind(
-              &PendingNotificationsTracker::DidFetchPersistentNotification,
-              weak_factory_.GetWeakPtr()),
-          base::ThreadTaskRunnerHandle::Get()));
-}
+bool PendingNotificationsTracker::CancelResourceFetches(
+    blink::WebNotificationDelegate* delegate) {
+  DCHECK(delegate);
 
-bool PendingNotificationsTracker::CancelPageNotificationFetches(
-    blink::WebNotificationDelegate* delegate) {
   auto iter = delegate_to_pending_id_map_.find(delegate);
   if (iter == delegate_to_pending_id_map_.end())
     return false;
 
   pending_notifications_.Remove(iter->second);
   delegate_to_pending_id_map_.erase(iter);
 
   return true;
 }
 
-void PendingNotificationsTracker::DidFetchPageNotification(
+void PendingNotificationsTracker::FetchesFinished(
     blink::WebNotificationDelegate* delegate,
-    int notification_id,
-    const SkBitmap& icon) {
+    int32_t notification_id,
+    const ResourcesCallback& resources_callback) {
   PendingNotification* pending_notification =
       pending_notifications_.Lookup(notification_id);
   DCHECK(pending_notification);
 
-  NotificationResources notification_resources;
-  notification_resources.notification_icon = icon;
-  pending_notification->callback.Run(notification_resources);
+  resources_callback.Run(pending_notification->GetResources());
 
-  delegate_to_pending_id_map_.erase(delegate);
+  if (delegate)
+    delegate_to_pending_id_map_.erase(delegate);
   pending_notifications_.Remove(notification_id);
 }
 
-void PendingNotificationsTracker::DidFetchPersistentNotification(
-    int notification_id, const SkBitmap& icon) {
-  PendingNotification* pending_notification =
-      pending_notifications_.Lookup(notification_id);
-  DCHECK(pending_notification);
-
-  NotificationResources notification_resources;
-  notification_resources.notification_icon = icon;
-  pending_notification->callback.Run(notification_resources);
-
-  pending_notifications_.Remove(notification_id);
-}
-
-int PendingNotificationsTracker::FetchNotificationResources(
-    const blink::WebNotificationData& notification_data,
-    const NotificationResourcesFetchedCallback& callback,
-    const scoped_refptr<NotificationImageLoader>& image_loader) {
-  int notification_id = pending_notifications_.Add(
-      new PendingNotification(image_loader, callback));
-
-  main_thread_task_runner_->PostTask(
-      FROM_HERE,
-      base::Bind(&NotificationImageLoader::StartOnMainThread, image_loader,
-                 notification_id, GURL(notification_data.icon)));
-
-  return notification_id;
-}
-
 }  // namespace content