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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/fallback_icon_source.h"
#include <vector>
#include "base/memory/ref_counted_memory.h"
#include "chrome/browser/search/instant_io_context.h"
#include "chrome/common/favicon/fallback_icon_url_parser.h"
#include "chrome/common/url_constants.h"
#include "components/favicon/core/fallback_icon_service.h"
#include "components/keyed_service/core/service_access_type.h"
#include "net/url_request/url_request.h"
#include "ui/gfx/favicon_size.h"
#include "url/gurl.h"
FallbackIconSource::FallbackIconSource(
favicon::FallbackIconService* fallback_icon_service)
: fallback_icon_service_(fallback_icon_service) {
}
FallbackIconSource::~FallbackIconSource() {
}
std::string FallbackIconSource::GetSource() const {
return chrome::kChromeUIFallbackIconHost;
}
void FallbackIconSource::StartDataRequest(
const std::string& path,
int render_process_id,
int render_frame_id,
const content::URLDataSource::GotDataCallback& callback) {
chrome::ParsedFallbackIconPath parsed;
bool success = parsed.Parse(path);
if (!success) {
SendDefaultResponse(callback);
return;
}
GURL url(parsed.url_string());
if (url.is_empty() || !url.is_valid()) {
SendDefaultResponse(callback);
return;
}
SendFallbackIconHelper(
url, parsed.size_in_pixels(), parsed.style(), callback);
}
std::string FallbackIconSource::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 FallbackIconSource::ShouldReplaceExistingSource() const {
// Leave the existing DataSource in place, otherwise we'll drop any pending
// requests on the floor.
return false;
}
bool FallbackIconSource::ShouldServiceRequest(
const net::URLRequest* request) const {
if (request->url().SchemeIs(chrome::kChromeSearchScheme))
return InstantIOContext::ShouldServiceRequest(request);
return URLDataSource::ShouldServiceRequest(request);
}
void FallbackIconSource::SendFallbackIconHelper(
const GURL& url,
int size_in_pixels,
const favicon_base::FallbackIconStyle& style,
const content::URLDataSource::GotDataCallback& callback) {
if (!fallback_icon_service_) { // Can be null for tests.
callback.Run(nullptr); // Trigger "Not Found" response.
return;
}
std::vector<unsigned char> bitmap_data =
fallback_icon_service_->RenderFallbackIconBitmap(
url, size_in_pixels, style);
callback.Run(base::RefCountedBytes::TakeVector(&bitmap_data));
}
void FallbackIconSource::SendDefaultResponse(
const content::URLDataSource::GotDataCallback& callback) {
favicon_base::FallbackIconStyle default_style;
SendFallbackIconHelper(GURL(), gfx::kFaviconSize, default_style, callback);
}
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