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// 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.
#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_IMAGE_DOWNLOADER_IMAGE_DOWNLOADER_IMPL_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_IMAGE_DOWNLOADER_IMAGE_DOWNLOADER_IMPL_H_
#include "mojo/public/cpp/bindings/receiver.h"
#include "third_party/blink/public/mojom/image_downloader/image_downloader.mojom-blink.h"
#include "third_party/blink/renderer/core/execution_context/context_lifecycle_observer.h"
#include "third_party/blink/renderer/platform/supplementable.h"
namespace blink {
class KURL;
class LocalFrame;
class MultiResolutionImageResourceFetcher;
class WebString;
struct WebSize;
class ImageDownloaderImpl final : public GarbageCollected<ImageDownloaderImpl>,
public Supplement<LocalFrame>,
public ContextLifecycleObserver,
public mojom::blink::ImageDownloader {
USING_PRE_FINALIZER(ImageDownloaderImpl, Dispose);
USING_GARBAGE_COLLECTED_MIXIN(ImageDownloaderImpl);
public:
static const char kSupplementName[];
explicit ImageDownloaderImpl(LocalFrame&);
~ImageDownloaderImpl() override;
using DownloadCallback =
base::OnceCallback<void(int32_t, const WTF::Vector<SkBitmap>&)>;
static ImageDownloaderImpl* From(LocalFrame&);
static void ProvideTo(LocalFrame&);
void Trace(Visitor*) override;
// OverContextLifecycleObserver overrides.
void ContextDestroyed(ExecutionContext*) override;
private:
// ImageDownloader implementation. Request to asynchronously download an
// image. When done, |callback| will be called.
void DownloadImage(const KURL& url,
bool is_favicon,
uint32_t preferred_size,
uint32_t max_bitmap_size,
bool bypass_cache,
DownloadImageCallback callback) override;
// Called when downloading finishes. All frames in |images| whose size <=
// |max_image_size| will be returned through |callback|. If all of the frames
// are larger than |max_image_size|, the smallest frame is resized to
// |max_image_size| and is the only result. |max_image_size| == 0 is
// interpreted as no max image size.
void DidDownloadImage(uint32_t max_bitmap_size,
DownloadImageCallback callback,
int32_t http_status_code,
const WTF::Vector<SkBitmap>& images);
void CreateMojoService(
mojo::PendingReceiver<mojom::blink::ImageDownloader> receiver);
// USING_PRE_FINALIZER interface.
// Called before the object gets garbage collected.
void Dispose();
// Requests to fetch an image. When done, the image downloader is notified by
// way of DidFetchImage. If the image is a favicon, cookies will not be sent
// nor accepted during download. If the image has multiple frames, all frames
// are returned.
void FetchImage(const KURL& image_url,
bool is_favicon,
const WebSize& preferred_size,
bool bypass_cache,
DownloadCallback callback);
// This callback is triggered when FetchImage completes, either
// successfully or with a failure. See FetchImage for more
// details.
void DidFetchImage(DownloadCallback callback,
const WebSize& preferred_size,
MultiResolutionImageResourceFetcher* fetcher,
const std::string& image_data,
const WebString& mime_type);
typedef WTF::Vector<std::unique_ptr<MultiResolutionImageResourceFetcher>>
ImageResourceFetcherList;
// ImageResourceFetchers schedule via FetchImage.
ImageResourceFetcherList image_fetchers_;
mojo::Receiver<mojom::blink::ImageDownloader> receiver_{this};
DISALLOW_COPY_AND_ASSIGN(ImageDownloaderImpl);
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_IMAGE_DOWNLOADER_IMAGE_DOWNLOADER_IMPL_H_
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