chromium/chrome/browser/ui/webui/ntp/ntp_resource_cache.h

// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CHROME_BROWSER_UI_WEBUI_NTP_NTP_RESOURCE_CACHE_H_
#define CHROME_BROWSER_UI_WEBUI_NTP_NTP_RESOURCE_CACHE_H_

#include <memory>
#include <string>

#include "base/memory/raw_ptr.h"
#include "base/memory/ref_counted.h"
#include "base/memory/ref_counted_memory.h"
#include "base/scoped_observation.h"
#include "chrome/browser/themes/theme_service_observer.h"
#include "components/keyed_service/core/keyed_service.h"
#include "components/prefs/pref_change_registrar.h"
#include "content/public/browser/web_contents.h"
#include "ui/native_theme/native_theme.h"
#include "ui/native_theme/native_theme_observer.h"

class Profile;

namespace base {
class RefCountedMemory;
class Value;
}  // namespace base

namespace policy {
class PolicyChangeRegistrar;
}

namespace ui {
class ColorProvider;
class ThemeProvider;
}

SkColor GetThemeColor(const ui::NativeTheme* native_theme,
                      const ui::ColorProvider& cp,
                      int id);
std::string GetNewTabBackgroundPositionCSS(
    const ui::ThemeProvider& theme_provider);
std::string GetNewTabBackgroundTilingCSS(
    const ui::ThemeProvider& theme_provider);

// This class keeps a cache of NTP resources (HTML and CSS) so we don't have to
// regenerate them all the time.
// Note: This is only used for incognito and guest mode NTPs (NewTabUI), as well
// as for (non-incognito) app launcher pages (AppLauncherPageUI).
class NTPResourceCache : public ThemeServiceObserver,
                         public KeyedService,
                         public ui::NativeThemeObserver { … };

#endif  // CHROME_BROWSER_UI_WEBUI_NTP_NTP_RESOURCE_CACHE_H_