Index: chrome/browser/image_loading_tracker.h |
=================================================================== |
--- chrome/browser/image_loading_tracker.h (revision 28272) |
+++ chrome/browser/image_loading_tracker.h (working copy) |
@@ -1,72 +0,0 @@ |
-// Copyright (c) 2009 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_IMAGE_LOADING_TRACKER_H_ |
-#define CHROME_BROWSER_IMAGE_LOADING_TRACKER_H_ |
- |
-#include "base/ref_counted.h" |
- |
-class FilePath; |
-class SkBitmap; |
- |
-// The views need to load their icons asynchronously but might be deleted before |
-// the images have loaded. This class stays alive while the request is in |
-// progress (manages its own lifetime) and keeps track of whether the view still |
-// cares about the icon loading. |
-class ImageLoadingTracker |
- : public base::RefCountedThreadSafe<ImageLoadingTracker> { |
- public: |
- class Observer { |
- public: |
- // Will be called when the image with the given index has loaded. |
- // The |image| is owned by the tracker, so the observer should make a copy |
- // if they need to access it after this call. |
- virtual void OnImageLoaded(SkBitmap* image, size_t index) = 0; |
- }; |
- |
- ImageLoadingTracker(Observer* observer, size_t image_count) |
- : observer_(observer), image_count_(image_count), posted_count_(0) { |
- AddRef(); // We hold on to a reference to ourself to make sure we don't |
- // get deleted until we get a response from image loading (see |
- // ImageLoadingDone). |
- } |
- ~ImageLoadingTracker() {} |
- |
- // If there are remaining images to be loaded, the observing object should |
- // call this method on its destruction, so that the tracker will not attempt |
- // to make any more callbacks to it. |
- void StopTrackingImageLoad() { |
- observer_ = NULL; |
- } |
- |
- // Specify path of image to load. This method must be called a number of |
- // times equal to the |image_count| arugment to the constructor. Calling it |
- // any more or less than that is an error. |
- void PostLoadImageTask(FilePath path); |
- |
- private: |
- class LoadImageTask; |
- |
- // When an image has finished loaded and scaled on the file thread, it is |
- // posted back to this method on the original thread. This method then calls |
- // the observer's OnImageLoaded and deletes the ImageLoadingTracker if it was |
- // the last image in the list. |
- // |image| may be null if the file failed to decode. |
- void OnImageLoaded(SkBitmap* image, size_t index); |
- |
- // The view that is waiting for the image to load. |
- Observer* observer_; |
- |
- // The number of images this ImageTracker should keep track of. This is |
- // decremented as each image finishes loading, and the tracker will delete |
- // itself when it reaches zero. |
- size_t image_count_; |
- |
- // The number of tasks that have been posted so far. |
- size_t posted_count_; |
- |
- DISALLOW_COPY_AND_ASSIGN(ImageLoadingTracker); |
-}; |
- |
-#endif // CHROME_BROWSER_IMAGE_LOADING_TRACKER_H_ |