gecko-dev/layout/base/LayoutConstants.h

32 строки
1.1 KiB
C

/* -*- 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/. */
/* constants used throughout the Layout module */
#ifndef LayoutConstants_h___
#define LayoutConstants_h___
#include "nsSize.h" // for NS_MAXSIZE
/**
* Constant used to indicate an unconstrained size.
*
* NOTE: The constants defined in this file are semantically used as symbolic
* values, so user should not depend on the underlying numeric values. If
* new specific use cases arise, define a new constant here.
*/
#define NS_UNCONSTRAINEDSIZE NS_MAXSIZE
// NS_AUTOOFFSET is assumed to have the same value as NS_UNCONSTRAINEDSIZE.
#define NS_AUTOOFFSET NS_UNCONSTRAINEDSIZE
// +1 is to avoid clamped huge margin values being processed as auto margins
#define NS_AUTOMARGIN (NS_UNCONSTRAINEDSIZE + 1)
#define NS_INTRINSIC_ISIZE_UNKNOWN nscoord_MIN
#endif // LayoutConstants_h___