app_list: Add web store search.

chrome/browser/ui/app_list/search/webstore_result_icon_source.cc

Index: chrome/browser/ui/app_list/search/webstore_result_icon_source.cc
diff --git a/chrome/browser/ui/app_list/search/webstore_result_icon_source.cc b/chrome/browser/ui/app_list/search/webstore_result_icon_source.cc
new file mode 100644
index 0000000000000000000000000000000000000000..66b3a70656b28341345ecadde1b5ea79ee525049
--- /dev/null
+++ b/chrome/browser/ui/app_list/search/webstore_result_icon_source.cc
@@ -0,0 +1,110 @@
+// Copyright 2013 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.
+
+#include "chrome/browser/ui/app_list/search/webstore_result_icon_source.h"
+
+#include <string>
+
+#include "content/public/browser/browser_thread.h"
+#include "grit/theme_resources.h"
+#include "net/base/load_flags.h"
+#include "net/url_request/url_fetcher.h"
+#include "net/url_request/url_request_status.h"
+#include "ui/base/resource/resource_bundle.h"
+#include "ui/gfx/canvas.h"
+#include "ui/gfx/image/image_skia_operations.h"
+
+using content::BrowserThread;
+
+namespace app_list {
+
+WebstoreResultIconSource::WebstoreResultIconSource(
+    const IconLoadedCallback& icon_loaded_callback,
+    net::URLRequestContextGetter* context_getter,
+    const GURL& icon_url,
+    int icon_size)
+    : icon_loaded_callback_(icon_loaded_callback),
+      context_getter_(context_getter),
+      icon_url_(icon_url),
+      icon_size_(icon_size),
+      icon_fetch_attempted_(false) {
+  DCHECK(!icon_loaded_callback_.is_null());
+}
+
+WebstoreResultIconSource::~WebstoreResultIconSource() {
+  if (image_decoder_.get())
+    image_decoder_->set_delegate(NULL);
+}
+
+void WebstoreResultIconSource::StartIconFetch() {
+  icon_fetch_attempted_ = true;
+
+  icon_fetcher_.reset(
+      net::URLFetcher::Create(icon_url_, net::URLFetcher::GET, this));
+  icon_fetcher_->SetRequestContext(context_getter_);
+  icon_fetcher_->SetLoadFlags(net::LOAD_DO_NOT_SAVE_COOKIES);
+  icon_fetcher_->Start();
+}
+
+gfx::ImageSkiaRep WebstoreResultIconSource::CreateBadgedIcon(
+    ui::ScaleFactor scale_factor) {
+  gfx::Canvas canvas(gfx::Size(icon_size_, icon_size_), scale_factor, false);
+
+  canvas.DrawImageInt(icon_, 0, 0);
+
+  const gfx::ImageSkia& badge = *ui::ResourceBundle::GetSharedInstance().
+       GetImageSkiaNamed(IDR_WEBSTORE_ICON_16);
+  canvas.DrawImageInt(
+      badge, icon_.width() - badge.width(), icon_.height() - badge.height());
+
+  return canvas.ExtractImageRep();
+}
+
+gfx::ImageSkiaRep WebstoreResultIconSource::GetImageForScale(
+    ui::ScaleFactor scale_factor) {
+  if (!icon_fetch_attempted_)
+    StartIconFetch();
+
+  if (!icon_.isNull())
+    return CreateBadgedIcon(scale_factor);
+
+  return ui::ResourceBundle::GetSharedInstance()
+      .GetImageSkiaNamed(IDR_WEBSTORE_ICON_32)->GetRepresentation(scale_factor);
+}
+
+void WebstoreResultIconSource::OnURLFetchComplete(
+    const net::URLFetcher* source) {
+  CHECK_EQ(icon_fetcher_.get(), source);
+
+  scoped_ptr<net::URLFetcher> fetcher(icon_fetcher_.Pass());
+
+  if (!fetcher->GetStatus().is_success() ||
+      fetcher->GetResponseCode() != 200) {
+    return;
+  }
+
+  std::string unsafe_icon_data;

[James Cook, 2013/05/20 14:39:34]

It's nice that you label unsafe data this way.

+  fetcher->GetResponseAsString(&unsafe_icon_data);
+
+  image_decoder_ =
+      new ImageDecoder(this, unsafe_icon_data, ImageDecoder::DEFAULT_CODEC);
+  image_decoder_->Start(
+      BrowserThread::GetMessageLoopProxyForThread(BrowserThread::UI));
+}
+
+void WebstoreResultIconSource::OnImageDecoded(const ImageDecoder* decoder,
+                                              const SkBitmap& decoded_image) {
+  icon_ = gfx::ImageSkiaOperations::CreateResizedImage(
+      gfx::ImageSkia::CreateFrom1xBitmap(decoded_image),
+      skia::ImageOperations::RESIZE_BEST,
+      gfx::Size(icon_size_, icon_size_));
+  icon_loaded_callback_.Run();
+}
+
+void WebstoreResultIconSource::OnDecodeImageFailed(
+    const ImageDecoder* decoder) {
+  // Failed to decode image. Do nothing and just use web store icon.
+}
+
+}  // namespace app_list