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// Copyright (c) 2012 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/bind.h"
#include "base/bind_helpers.h"
#include "base/strings/string_split.h"
#include "base/strings/string_util.h"
#include "base/strings/stringprintf.h"
#include "base/values.h"
#include "chrome/browser/extensions/extension_icon_manager.h"
#include "chrome/browser/favicon/favicon_service.h"
#include "chrome/browser/favicon/favicon_service_factory.h"
#include "chrome/browser/history/top_sites.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/common/url_constants.h"
#include "content/public/browser/web_ui.h"
#include "extensions/browser/extension_registry.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/gfx/codec/png_codec.h"
#include "ui/gfx/color_analysis.h"
#include "ui/gfx/favicon_size.h"
namespace {
base::StringValue* SkColorToCss(SkColor color) {
return new base::StringValue(base::StringPrintf("rgb(%d, %d, %d)",
SkColorGetR(color),
SkColorGetG(color),
SkColorGetB(color)));
}
base::StringValue* GetDominantColorCssString(
scoped_refptr<base::RefCountedMemory> png) {
color_utils::GridSampler sampler;
SkColor color = color_utils::CalculateKMeanColorOfPNG(png);
return SkColorToCss(color);
}
} // namespace
// Thin inheritance-dependent trampoline to forward notification of app
// icon loads to the FaviconWebUIHandler. Base class does caching of icons.
class ExtensionIconColorManager : public ExtensionIconManager {
public:
explicit ExtensionIconColorManager(FaviconWebUIHandler* handler)
: ExtensionIconManager(),
handler_(handler) {}
~ExtensionIconColorManager() override {}
void OnImageLoaded(const std::string& extension_id,
const gfx::Image& image) override {
ExtensionIconManager::OnImageLoaded(extension_id, image);
handler_->NotifyAppIconReady(extension_id);
}
private:
FaviconWebUIHandler* handler_;
};
FaviconWebUIHandler::FaviconWebUIHandler()
: id_(0),
app_icon_color_manager_(new ExtensionIconColorManager(this)) {
}
FaviconWebUIHandler::~FaviconWebUIHandler() {
}
void FaviconWebUIHandler::RegisterMessages() {
web_ui()->RegisterMessageCallback("getFaviconDominantColor",
base::Bind(&FaviconWebUIHandler::HandleGetFaviconDominantColor,
base::Unretained(this)));
web_ui()->RegisterMessageCallback("getAppIconDominantColor",
base::Bind(&FaviconWebUIHandler::HandleGetAppIconDominantColor,
base::Unretained(this)));
}
void FaviconWebUIHandler::HandleGetFaviconDominantColor(
const base::ListValue* args) {
std::string path;
CHECK(args->GetString(0, &path));
std::string prefix = "chrome://favicon/size/";
DCHECK(StartsWithASCII(path, prefix, false)) << "path is " << path;
size_t slash = path.find("/", prefix.length());
path = path.substr(slash + 1);
std::string dom_id;
CHECK(args->GetString(1, &dom_id));
FaviconService* favicon_service = FaviconServiceFactory::GetForProfile(
Profile::FromWebUI(web_ui()), Profile::EXPLICIT_ACCESS);
if (!favicon_service || path.empty())
return;
GURL url(path);
// Intercept requests for prepopulated pages.
for (size_t i = 0; i < history::kPrepopulatedPagesCount; i++) {
if (url.spec() ==
l10n_util::GetStringUTF8(history::kPrepopulatedPages[i].url_id)) {
base::StringValue dom_id_value(dom_id);
scoped_ptr<base::StringValue> color(
SkColorToCss(history::kPrepopulatedPages[i].color));
web_ui()->CallJavascriptFunction("ntp.setFaviconDominantColor",
dom_id_value, *color);
return;
}
}
dom_id_map_[id_] = dom_id;
favicon_service->GetRawFaviconForPageURL(
url,
favicon_base::FAVICON,
gfx::kFaviconSize,
base::Bind(&FaviconWebUIHandler::OnFaviconDataAvailable,
base::Unretained(this),
id_++),
&cancelable_task_tracker_);
}
void FaviconWebUIHandler::OnFaviconDataAvailable(
int id,
const favicon_base::FaviconRawBitmapResult& bitmap_result) {
scoped_ptr<base::StringValue> color_value;
if (bitmap_result.is_valid())
color_value.reset(GetDominantColorCssString(bitmap_result.bitmap_data));
else
color_value.reset(new base::StringValue("#919191"));
base::StringValue dom_id(dom_id_map_[id]);
web_ui()->CallJavascriptFunction("ntp.setFaviconDominantColor",
dom_id, *color_value);
dom_id_map_.erase(id);
}
void FaviconWebUIHandler::HandleGetAppIconDominantColor(
const base::ListValue* args) {
std::string extension_id;
CHECK(args->GetString(0, &extension_id));
Profile* profile = Profile::FromWebUI(web_ui());
extensions::ExtensionRegistry* extension_registry =
extensions::ExtensionRegistry::Get(profile);
const extensions::Extension* extension =
extension_registry->enabled_extensions().GetByID(extension_id);
if (!extension)
return;
app_icon_color_manager_->LoadIcon(profile, extension);
}
void FaviconWebUIHandler::NotifyAppIconReady(const std::string& extension_id) {
const SkBitmap& bitmap = app_icon_color_manager_->GetIcon(extension_id);
// TODO(estade): would be nice to avoid a round trip through png encoding.
std::vector<unsigned char> bits;
if (!gfx::PNGCodec::EncodeBGRASkBitmap(bitmap, true, &bits))
return;
scoped_refptr<base::RefCountedStaticMemory> bits_mem(
new base::RefCountedStaticMemory(&bits.front(), bits.size()));
scoped_ptr<base::StringValue> color_value(
GetDominantColorCssString(bits_mem));
base::StringValue id(extension_id);
web_ui()->CallJavascriptFunction(
"ntp.setFaviconDominantColor", id, *color_value);
}
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