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// Copyright 2015 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/large_icon_source.h"
#include <vector>
#include "base/memory/ref_counted_memory.h"
#include "chrome/browser/search/instant_io_context.h"
#include "chrome/common/url_constants.h"
#include "components/favicon/core/fallback_icon_service.h"
#include "components/favicon/core/large_icon_service.h"
#include "components/favicon_base/fallback_icon_style.h"
#include "components/favicon_base/favicon_types.h"
#include "components/favicon_base/large_icon_url_parser.h"
#include "net/url_request/url_request.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "ui/gfx/codec/png_codec.h"
namespace {
const int kMaxLargeIconSize = 192; // Arbitrary bound to safeguard endpoint.
} // namespace
LargeIconSource::LargeIconSource(
favicon::FallbackIconService* fallback_icon_service,
favicon::LargeIconService* large_icon_service)
: fallback_icon_service_(fallback_icon_service),
large_icon_service_(large_icon_service) {
}
LargeIconSource::~LargeIconSource() {
}
std::string LargeIconSource::GetSource() const {
return chrome::kChromeUILargeIconHost;
}
void LargeIconSource::StartDataRequest(
const std::string& path,
int render_process_id,
int render_frame_id,
const content::URLDataSource::GotDataCallback& callback) {
if (!large_icon_service_) {
SendNotFoundResponse(callback);
return;
}
LargeIconUrlParser parser;
bool success = parser.Parse(path);
if (!success ||
parser.size_in_pixels() <= 0 ||
parser.size_in_pixels() > kMaxLargeIconSize) {
SendNotFoundResponse(callback);
return;
}
GURL url(parser.url_string());
if (!url.is_valid()) {
SendNotFoundResponse(callback);
return;
}
// TODO(beaudoin): Potentially allow icon to be scaled up.
large_icon_service_->GetLargeIconOrFallbackStyle(
url,
parser.size_in_pixels(), // Reducing this will enable scale up.
parser.size_in_pixels(),
base::Bind(&LargeIconSource::OnLargeIconDataAvailable,
base::Unretained(this), callback, url,
parser.size_in_pixels()),
&cancelable_task_tracker_);
}
std::string LargeIconSource::GetMimeType(const std::string&) const {
// We need to explicitly return a mime type, otherwise if the user tries to
// drag the image they get no extension.
return "image/png";
}
bool LargeIconSource::ShouldReplaceExistingSource() const {
// Leave the existing DataSource in place, otherwise we'll drop any pending
// requests on the floor.
return false;
}
bool LargeIconSource::ShouldServiceRequest(
const net::URLRequest* request) const {
if (request->url().SchemeIs(chrome::kChromeSearchScheme))
return InstantIOContext::ShouldServiceRequest(request);
return URLDataSource::ShouldServiceRequest(request);
}
void LargeIconSource::OnLargeIconDataAvailable(
const content::URLDataSource::GotDataCallback& callback,
const GURL& url,
int size,
const favicon_base::LargeIconResult& result) {
if (result.bitmap.is_valid()) {
callback.Run(result.bitmap.bitmap_data.get());
return;
}
// Bitmap is invalid, use the fallback if service is available.
if (!fallback_icon_service_ || !result.fallback_icon_style) {
SendNotFoundResponse(callback);
return;
}
#if defined(OS_ANDROID)
// RenderFallbackIconBitmap() cannot draw fallback icons on Android. See
// crbug.com/580922 for details. Return a 1x1 bitmap so that JavaScript can
// detect that it needs to generate a fallback icon.
SkBitmap bitmap;
bitmap.allocN32Pixels(1, 1);
bitmap.eraseColor(result.fallback_icon_style->background_color);
std::vector<unsigned char> bitmap_data;
if (!gfx::PNGCodec::EncodeBGRASkBitmap(bitmap, false, &bitmap_data))
bitmap_data.clear();
#else
std::vector<unsigned char> bitmap_data =
fallback_icon_service_->RenderFallbackIconBitmap(
url, size, *result.fallback_icon_style);
#endif
callback.Run(base::RefCountedBytes::TakeVector(&bitmap_data));
}
void LargeIconSource::SendNotFoundResponse(
const content::URLDataSource::GotDataCallback& callback) {
callback.Run(nullptr);
}
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