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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 http://mozilla.org/MPL/2.0/.
*/
// IWYU pragma: private, include "nsDisplayList.h"
/**
* It's useful to be able to dynamically check the type of certain items.
* Every subclass of nsDisplayItem must have a new type added here for the
* purposes of easy comparison and matching of items in different display lists.
*/
#ifndef NSDISPLAYITEMTYPES_H_
#define NSDISPLAYITEMTYPES_H_
enum class DisplayItemType : uint8_t {
TYPE_ZERO = 0, /** Spacer so that the first item starts at 1 */
#define DECLARE_DISPLAY_ITEM_TYPE(name, flags) TYPE_##name,
#include "nsDisplayItemTypesList.h"
#undef DECLARE_DISPLAY_ITEM_TYPE
TYPE_MAX
};
enum {
// Number of bits needed to represent all types
TYPE_BITS = 8
};
enum DisplayItemFlags {
TYPE_RENDERS_NO_IMAGES = 1 << 0,
TYPE_IS_CONTENTFUL = 1 << 1,
TYPE_IS_CONTAINER = 1 << 2
};
inline const char* DisplayItemTypeName(DisplayItemType aType) {
switch (aType) {
#define DECLARE_DISPLAY_ITEM_TYPE(name, flags) \
case DisplayItemType::TYPE_##name: \
return #name;
#include "nsDisplayItemTypesList.h"
#undef DECLARE_DISPLAY_ITEM_TYPE
default:
return "TYPE_UNKNOWN";
}
}
inline uint8_t GetDisplayItemFlagsForType(DisplayItemType aType) {
static const uint8_t flags[static_cast<uint32_t>(DisplayItemType::TYPE_MAX)] =
{0
#define DECLARE_DISPLAY_ITEM_TYPE(name, flags) , flags
#include "nsDisplayItemTypesList.h"
#undef DECLARE_DISPLAY_ITEM_TYPE
};
return flags[static_cast<uint32_t>(aType)];
}
inline DisplayItemType GetDisplayItemTypeFromKey(uint32_t aDisplayItemKey) {
static const uint32_t typeMask = (1 << TYPE_BITS) - 1;
DisplayItemType type =
static_cast<DisplayItemType>(aDisplayItemKey & typeMask);
NS_ASSERTION(
type >= DisplayItemType::TYPE_ZERO && type < DisplayItemType::TYPE_MAX,
"Invalid display item type!");
return type;
}
#endif /*NSDISPLAYITEMTYPES_H_*/
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