webkit/glue/multi_resolution_image_resource_fetcher.cc

   1 // Copyright (c) 2012 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/multi_resolution_image_resource_fetcher.h"
   6
   7 #include "base/bind.h"
   8 #include "base/bind_helpers.h"
   9 #include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
  10 #include "ui/gfx/size.h"
  11 #include "webkit/glue/image_decoder.h"
  12 #include "third_party/skia/include/core/SkBitmap.h"
  13
  14 using WebKit::WebFrame;
  15 using WebKit::WebURLRequest;
  16 using WebKit::WebURLResponse;
  17
  18 namespace webkit_glue {
  19
  20 MultiResolutionImageResourceFetcher::MultiResolutionImageResourceFetcher(
  21     const GURL& image_url,
  22     WebFrame* frame,
  23     int id,
  24     WebURLRequest::TargetType target_type,
  25     const Callback& callback)
  26     : callback_(callback),
  27       id_(id),
  28       image_url_(image_url) {
  29   fetcher_.reset(new ResourceFetcher(
  30       image_url, frame, target_type,
  31       base::Bind(&MultiResolutionImageResourceFetcher::OnURLFetchComplete,
  32                  base::Unretained(this))));
  33 }
  34
  35 MultiResolutionImageResourceFetcher::~MultiResolutionImageResourceFetcher() {
  36   if (!fetcher_->completed())
  37     fetcher_->Cancel();
  38 }
  39
  40 void MultiResolutionImageResourceFetcher::OnURLFetchComplete(
  41     const WebURLResponse& response,
  42     const std::string& data) {
  43   std::vector<SkBitmap> bitmaps;
  44   if (!response.isNull() && response.httpStatusCode() == 200) {
  45     // Request succeeded, try to convert it to an image.
  46     bitmaps = ImageDecoder::DecodeAll(
  47         reinterpret_cast<const unsigned char*>(data.data()), data.size());
  48   } // else case:
  49     // If we get here, it means no image from server or couldn't decode the
  50     // response as an image. The delegate will see an empty vector.
  51
  52   // Take a reference to the callback as running the callback may lead to our
  53   // destruction.
  54   Callback callback = callback_;
  55   callback.Run(this, bitmaps);
  56 }
  57
  58 }  // namespace webkit_glue