1// Copyright (c) 2011 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "webkit/glue/image_resource_fetcher.h"
6
7#include "base/callback.h"
8#include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
9#include "ui/gfx/size.h"
10#include "webkit/glue/image_decoder.h"
11#include "third_party/skia/include/core/SkBitmap.h"
12
13using WebKit::WebFrame;
14using WebKit::WebURLRequest;
15using WebKit::WebURLResponse;
16
17namespace webkit_glue {
18
19ImageResourceFetcher::ImageResourceFetcher(
20    const GURL& image_url,
21    WebFrame* frame,
22    int id,
23    int image_size,
24    WebURLRequest::TargetType target_type,
25    Callback* callback)
26    : callback_(callback),
27      id_(id),
28      image_url_(image_url),
29      image_size_(image_size) {
30  fetcher_.reset(new ResourceFetcher(
31      image_url, frame, target_type,
32      NewCallback(this, &ImageResourceFetcher::OnURLFetchComplete)));
33}
34
35ImageResourceFetcher::~ImageResourceFetcher() {
36  if (!fetcher_->completed())
37    fetcher_->Cancel();
38}
39
40void ImageResourceFetcher::OnURLFetchComplete(
41    const WebURLResponse& response,
42    const std::string& data) {
43  SkBitmap bitmap;
44  if (!response.isNull() && response.httpStatusCode() == 200) {
45    // Request succeeded, try to convert it to an image.
46    ImageDecoder decoder(gfx::Size(image_size_, image_size_));
47    bitmap = decoder.Decode(
48        reinterpret_cast<const unsigned char*>(data.data()), data.size());
49  } // else case:
50    // If we get here, it means no image from server or couldn't decode the
51    // response as an image. The delegate will see a null image, indicating
52    // that an error occurred.
53
54  // Take care to clear callback_ before running the callback as it may lead to
55  // our destruction.
56  scoped_ptr<Callback> callback;
57  callback.swap(callback_);
58  callback->Run(this, bitmap);
59}
60
61}  // namespace webkit_glue
62