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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/favicon_source.h"
#include <cmath>
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/strings/string_number_conversions.h"
#include "chrome/browser/favicon/favicon_service_factory.h"
#include "chrome/browser/history/top_sites.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/search/instant_io_context.h"
#include "chrome/browser/sync/open_tabs_ui_delegate.h"
#include "chrome/browser/sync/profile_sync_service.h"
#include "chrome/browser/sync/profile_sync_service_factory.h"
#include "chrome/common/favicon/favicon_url_parser.h"
#include "chrome/common/url_constants.h"
#include "chrome/grit/locale_settings.h"
#include "net/url_request/url_request.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/base/layout.h"
#include "ui/base/resource/resource_bundle.h"
#include "ui/base/webui/web_ui_util.h"
#include "ui/resources/grit/ui_resources.h"
FaviconSource::IconRequest::IconRequest()
: size_in_dip(gfx::kFaviconSize), device_scale_factor(1.0f) {
}
FaviconSource::IconRequest::IconRequest(
const content::URLDataSource::GotDataCallback& cb,
const GURL& path,
int size,
float scale)
: callback(cb),
request_path(path),
size_in_dip(size),
device_scale_factor(scale) {
}
FaviconSource::IconRequest::~IconRequest() {
}
FaviconSource::FaviconSource(Profile* profile, IconType type)
: profile_(profile->GetOriginalProfile()),
icon_types_(type == FAVICON ? favicon_base::FAVICON
: favicon_base::TOUCH_PRECOMPOSED_ICON |
favicon_base::TOUCH_ICON |
favicon_base::FAVICON) {}
FaviconSource::~FaviconSource() {
}
std::string FaviconSource::GetSource() const {
return icon_types_ == favicon_base::FAVICON ? chrome::kChromeUIFaviconHost
: chrome::kChromeUITouchIconHost;
}
void FaviconSource::StartDataRequest(
const std::string& path,
int render_process_id,
int render_frame_id,
const content::URLDataSource::GotDataCallback& callback) {
FaviconService* favicon_service =
FaviconServiceFactory::GetForProfile(profile_, Profile::EXPLICIT_ACCESS);
if (!favicon_service) {
SendDefaultResponse(callback);
return;
}
chrome::ParsedFaviconPath parsed;
bool success = chrome::ParseFaviconPath(path, icon_types_, &parsed);
if (!success) {
SendDefaultResponse(callback);
return;
}
GURL url(parsed.url);
int desired_size_in_pixel =
std::ceil(parsed.size_in_dip * parsed.device_scale_factor);
if (parsed.is_icon_url) {
// TODO(michaelbai): Change GetRawFavicon to support combination of
// IconType.
favicon_service->GetRawFavicon(
url,
favicon_base::FAVICON,
desired_size_in_pixel,
base::Bind(
&FaviconSource::OnFaviconDataAvailable,
base::Unretained(this),
IconRequest(
callback, url, parsed.size_in_dip, parsed.device_scale_factor)),
&cancelable_task_tracker_);
} else {
// Intercept requests for prepopulated pages.
for (int i = 0; i < history::kPrepopulatedPagesCount; i++) {
if (url.spec() ==
l10n_util::GetStringUTF8(history::kPrepopulatedPages[i].url_id)) {
ui::ScaleFactor resource_scale_factor =
ui::GetSupportedScaleFactor(parsed.device_scale_factor);
callback.Run(
ResourceBundle::GetSharedInstance().LoadDataResourceBytesForScale(
history::kPrepopulatedPages[i].favicon_id,
resource_scale_factor));
return;
}
}
favicon_service->GetRawFaviconForPageURL(
url,
icon_types_,
desired_size_in_pixel,
base::Bind(
&FaviconSource::OnFaviconDataAvailable,
base::Unretained(this),
IconRequest(
callback, url, parsed.size_in_dip, parsed.device_scale_factor)),
&cancelable_task_tracker_);
}
}
std::string FaviconSource::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 FaviconSource::ShouldReplaceExistingSource() const {
// Leave the existing DataSource in place, otherwise we'll drop any pending
// requests on the floor.
return false;
}
bool FaviconSource::ShouldServiceRequest(const net::URLRequest* request) const {
if (request->url().SchemeIs(chrome::kChromeSearchScheme))
return InstantIOContext::ShouldServiceRequest(request);
return URLDataSource::ShouldServiceRequest(request);
}
bool FaviconSource::HandleMissingResource(const IconRequest& request) {
// If the favicon is not available, try to use the synced favicon.
ProfileSyncService* sync_service =
ProfileSyncServiceFactory::GetInstance()->GetForProfile(profile_);
browser_sync::OpenTabsUIDelegate* open_tabs = sync_service ?
sync_service->GetOpenTabsUIDelegate() : NULL;
scoped_refptr<base::RefCountedMemory> response;
if (open_tabs &&
open_tabs->GetSyncedFaviconForPageURL(request.request_path.spec(),
&response)) {
request.callback.Run(response.get());
return true;
}
return false;
}
void FaviconSource::OnFaviconDataAvailable(
const IconRequest& request,
const favicon_base::FaviconRawBitmapResult& bitmap_result) {
if (bitmap_result.is_valid()) {
// Forward the data along to the networking system.
request.callback.Run(bitmap_result.bitmap_data.get());
} else if (!HandleMissingResource(request)) {
SendDefaultResponse(request);
}
}
void FaviconSource::SendDefaultResponse(
const content::URLDataSource::GotDataCallback& callback) {
SendDefaultResponse(IconRequest(callback, GURL(), 16, 1.0f));
}
void FaviconSource::SendDefaultResponse(const IconRequest& icon_request) {
int favicon_index;
int resource_id;
switch (icon_request.size_in_dip) {
case 64:
favicon_index = SIZE_64;
resource_id = IDR_DEFAULT_FAVICON_64;
break;
case 32:
favicon_index = SIZE_32;
resource_id = IDR_DEFAULT_FAVICON_32;
break;
default:
favicon_index = SIZE_16;
resource_id = IDR_DEFAULT_FAVICON;
break;
}
base::RefCountedMemory* default_favicon =
default_favicons_[favicon_index].get();
if (!default_favicon) {
ui::ScaleFactor resource_scale_factor =
ui::GetSupportedScaleFactor(icon_request.device_scale_factor);
default_favicon =
ResourceBundle::GetSharedInstance().LoadDataResourceBytesForScale(
resource_id, resource_scale_factor);
default_favicons_[favicon_index] = default_favicon;
}
icon_request.callback.Run(default_favicon);
}
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