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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/theme_source.h"
#include "base/memory/ref_counted_memory.h"
#include "base/message_loop/message_loop.h"
#include "base/strings/string_number_conversions.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/resources_util.h"
#include "chrome/browser/search/instant_io_context.h"
#include "chrome/browser/themes/theme_properties.h"
#include "chrome/browser/themes/theme_service.h"
#include "chrome/browser/themes/theme_service_factory.h"
#include "chrome/browser/ui/webui/ntp/ntp_resource_cache.h"
#include "chrome/browser/ui/webui/ntp/ntp_resource_cache_factory.h"
#include "chrome/common/url_constants.h"
#include "content/public/browser/browser_thread.h"
#include "net/url_request/url_request.h"
#include "ui/base/layout.h"
#include "ui/base/resource/resource_bundle.h"
#include "ui/webui/web_ui_util.h"
#include "url/gurl.h"
using content::BrowserThread;
namespace {
std::string GetThemePath() {
return std::string(chrome::kChromeUIScheme) +
"://" + std::string(chrome::kChromeUIThemePath) + "/";
}
// use a resource map rather than hard-coded strings.
static const char* kNewTabCSSPath = "css/new_tab_theme.css";
static const char* kNewIncognitoTabCSSPath = "css/incognito_new_tab_theme.css";
} // namespace
////////////////////////////////////////////////////////////////////////////////
// ThemeSource, public:
ThemeSource::ThemeSource(Profile* profile)
: profile_(profile->GetOriginalProfile()) {
NTPResourceCache::WindowType win_type = NTPResourceCache::GetWindowType(
profile_, NULL);
css_bytes_ =
NTPResourceCacheFactory::GetForProfile(profile)->GetNewTabCSS(win_type);
}
ThemeSource::~ThemeSource() {
}
std::string ThemeSource::GetSource() const {
return chrome::kChromeUIThemePath;
}
void ThemeSource::StartDataRequest(
const std::string& path,
int render_process_id,
int render_view_id,
const content::URLDataSource::GotDataCallback& callback) {
// Default scale factor if not specified.
ui::ScaleFactor scale_factor;
std::string uncached_path;
webui::ParsePathAndScale(GURL(GetThemePath() + path),
&uncached_path,
&scale_factor);
if (uncached_path == kNewTabCSSPath ||
uncached_path == kNewIncognitoTabCSSPath) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
callback.Run(css_bytes_.get());
return;
}
int resource_id = ResourcesUtil::GetThemeResourceId(uncached_path);
if (resource_id != -1) {
SendThemeBitmap(callback, resource_id, scale_factor);
return;
}
// We don't have any data to send back.
callback.Run(NULL);
}
std::string ThemeSource::GetMimeType(const std::string& path) const {
std::string uncached_path;
webui::ParsePathAndScale(GURL(GetThemePath() + path), &uncached_path, NULL);
if (uncached_path == kNewTabCSSPath ||
uncached_path == kNewIncognitoTabCSSPath) {
return "text/css";
}
return "image/png";
}
base::MessageLoop* ThemeSource::MessageLoopForRequestPath(
const std::string& path) const {
std::string uncached_path;
webui::ParsePathAndScale(GURL(GetThemePath() + path), &uncached_path, NULL);
if (uncached_path == kNewTabCSSPath ||
uncached_path == kNewIncognitoTabCSSPath) {
// We generated and cached this when we initialized the object. We don't
// have to go back to the UI thread to send the data.
return NULL;
}
// If it's not a themeable image, we don't need to go to the UI thread.
int resource_id = ResourcesUtil::GetThemeResourceId(uncached_path);
if (!ThemeProperties::IsThemeableImage(resource_id))
return NULL;
return content::URLDataSource::MessageLoopForRequestPath(path);
}
bool ThemeSource::ShouldReplaceExistingSource() const {
// We currently get the css_bytes_ in the ThemeSource constructor, so we need
// to recreate the source itself when a theme changes.
return true;
}
bool ThemeSource::ShouldServiceRequest(const net::URLRequest* request) const {
if (request->url().SchemeIs(chrome::kChromeSearchScheme))
return InstantIOContext::ShouldServiceRequest(request);
return URLDataSource::ShouldServiceRequest(request);
}
////////////////////////////////////////////////////////////////////////////////
// ThemeSource, private:
void ThemeSource::SendThemeBitmap(
const content::URLDataSource::GotDataCallback& callback,
int resource_id,
ui::ScaleFactor scale_factor) {
if (ThemeProperties::IsThemeableImage(resource_id)) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
ui::ThemeProvider* tp = ThemeServiceFactory::GetForProfile(profile_);
DCHECK(tp);
scoped_refptr<base::RefCountedMemory> image_data(tp->GetRawData(
resource_id, scale_factor));
callback.Run(image_data.get());
} else {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
const ResourceBundle& rb = ResourceBundle::GetSharedInstance();
callback.Run(rb.LoadDataResourceBytesForScale(resource_id, scale_factor));
}
}
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