Retry r88137:

chrome/browser/ui/webui/ntp/favicon_webui_handler.cc

+// Copyright (c) 2011 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/webui/ntp/favicon_webui_handler.h"
+
+#include "base/callback.h"
+#include "base/string_util.h"
+#include "base/values.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/common/url_constants.h"
+#include "grit/app_resources.h"
+#include "third_party/skia/include/core/SkBitmap.h"
+#include "ui/gfx/codec/png_codec.h"
+#include "ui/gfx/color_analysis.h"
+
+FaviconWebUIHandler::FaviconWebUIHandler() {
+}
+
+FaviconWebUIHandler::~FaviconWebUIHandler() {
+}
+
+void FaviconWebUIHandler::RegisterMessages() {
+  web_ui_->RegisterMessageCallback("getFaviconDominantColor",
+      NewCallback(this, &FaviconWebUIHandler::HandleGetFaviconDominantColor));
+}
+
+void FaviconWebUIHandler::HandleGetFaviconDominantColor(const ListValue* args) {
+  std::string path;
+  CHECK(args->GetString(0, &path));
+  DCHECK(StartsWithASCII(path, "chrome://favicon/", false)) << "path is "
+                                                            << path;
+  path = path.substr(arraysize("chrome://favicon/") - 1);
+
+  double id;
+  CHECK(args->GetDouble(1, &id));
+
+  FaviconService* favicon_service =
+      web_ui_->GetProfile()->GetFaviconService(Profile::EXPLICIT_ACCESS);
+  if (!favicon_service || path.empty())
+    return;
+
+  FaviconService::Handle handle = favicon_service->GetFaviconForURL(
+      GURL(path),
+      history::FAVICON,
+      &consumer_,
+      NewCallback(this, &FaviconWebUIHandler::OnFaviconDataAvailable));
+  consumer_.SetClientData(favicon_service, handle, static_cast<int>(id));
+}
+
+void FaviconWebUIHandler::OnFaviconDataAvailable(
+    FaviconService::Handle request_handle,
+    history::FaviconData favicon) {
+  FaviconService* favicon_service =
+      web_ui_->GetProfile()->GetFaviconService(Profile::EXPLICIT_ACCESS);
+  int id = consumer_.GetClientData(favicon_service, request_handle);
+
+  if (favicon.is_valid()) {
+    // TODO(estade): cache the response
+    FundamentalValue id_value(id);
+
+    color_utils::GridSampler sampler;
+    SkColor color =
+        color_utils::CalculateKMeanColorOfPNG(favicon.image_data, 100, 665,
+                                              sampler);
+    std::string css_color = base::StringPrintf("rgb(%d, %d, %d)",
+                                               SkColorGetR(color),
+                                               SkColorGetG(color),
+                                               SkColorGetB(color));
+    StringValue color_value(css_color);
+    web_ui_->CallJavascriptFunction("ntp4.setFaviconDominantColor",
+                                    id_value, color_value);
+  }
+}