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
13 using WebKit::WebFrame;
14 using WebKit::WebURLRequest;
15 using WebKit::WebURLResponse;
16
17 namespace webkit_glue {
18
ImageResourceFetcher(const GURL & image_url,WebFrame * frame,int id,int image_size,WebURLRequest::TargetType target_type,Callback * callback)19 ImageResourceFetcher::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
~ImageResourceFetcher()35 ImageResourceFetcher::~ImageResourceFetcher() {
36 if (!fetcher_->completed())
37 fetcher_->Cancel();
38 }
39
OnURLFetchComplete(const WebURLResponse & response,const std::string & data)40 void 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