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// 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/ui_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/size/32/", false)) <<
"path is " << path;
path = path.substr(arraysize("chrome://favicon/size/32/") - 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);
FundamentalValue id_value(id);
scoped_ptr<StringValue> color_value;
if (favicon.is_valid()) {
// TODO(estade): cache the response
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));
color_value.reset(new StringValue(css_color));
} else {
color_value.reset(new StringValue("#919191"));
}
web_ui_->CallJavascriptFunction("ntp4.setFaviconDominantColor",
id_value, *color_value);
}
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