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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at */
/* values to identify particular subtrees of native anonymous content */
#ifndef mozilla_AnonymousContentKey_h
#define mozilla_AnonymousContentKey_h
#include "mozilla/TypedEnumBits.h"
#include <stdint.h>
#include "X11UndefineNone.h"
namespace mozilla {
// clang-format off
// We currently use cached anonymous content styles only for scrollbar parts,
// and we can fit the type of scrollbar part element along with its different
// options (such as orientation, and other attribute values that can affect
// styling) into a uint8_t.
// The lower three bits hold a Type_* value identifying the type of
// element, and the remaining bits store Flag_* values.
// A value of 0 is used to represent an anonymous content subtree that we don't
// cache styles for.
enum class AnonymousContentKey : uint8_t {
None = 0x00,
// all
Type_ScrollCorner = 0x01,
Type_Scrollbar = 0x02,
Type_ScrollbarButton = 0x03,
Type_Slider = 0x04,
// scrollbar, scrollbarbutton, slider
Flag_Vertical = 0x08,
// scrollbarbutton
Flag_ScrollbarButton_Down = 0x10,
Flag_ScrollbarButton_Bottom = 0x20,
Flag_ScrollbarButton_Decrement = 0x40,
// clang-format on
} // namespace mozilla
#endif // mozilla_AnonymousContentKey_h