browser_theme_pack.h | Explore in Territory

// 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_THEMES_BROWSER_THEME_PACK_H_
#define CHROME_BROWSER_THEMES_BROWSER_THEME_PACK_H_

#include <stdint.h>

#include <map>
#include <memory>
#include <string>
#include <string_view>
#include <vector>

#include "base/containers/flat_map.h"
#include "base/memory/raw_ptr.h"
#include "base/task/sequenced_task_runner_helpers.h"
#include "base/values.h"
#include "chrome/browser/themes/custom_theme_supplier.h"
#include "chrome/common/themes/autogenerated_theme_util.h"
#include "extensions/common/extension.h"
#include "third_party/skia/include/core/SkColor.h"
#include "ui/base/resource/resource_scale_factor.h"
#include "ui/gfx/color_utils.h"

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

namespace gfx {
class Image;
}

namespace ui {
class ColorProvider;
class DataPack;
}

// An optimized representation of a theme, backed by a mmapped DataPack.
//
// The idea is to pre-process all images (tinting, compositing, etc) at theme
// install time, save all the PNG-ified data into an mmappable file so we don't
// suffer multiple file system access times, therefore solving two of the
// problems with the previous implementation.
//
// A note on const-ness. All public, non-static methods are const.  We do this
// because once we've constructed a BrowserThemePack through the
// BuildFromExtension() interface, we WriteToDisk() on a thread other than the
// UI thread that consumes a BrowserThemePack. There is no locking; thread
// safety between the writing thread and the UI thread is ensured by having the
// data be immutable.
//
// BrowserThemePacks are always deleted on a sequence with I/O allowed because
// in the common case, they are backed by mmapped data and the unmmapping
// operation will trip our IO on the UI thread detector.
// See CustomThemeSupplier constructor more more details.
class BrowserThemePack : public CustomThemeSupplier { … };

#endif  // CHROME_BROWSER_THEMES_BROWSER_THEME_PACK_H_
chromium/chrome/browser/themes/browser_theme_pack.h
