/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* 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/. */ /* Utility code for performing CSS Box Alignment */ #ifndef mozilla_CSSAlignUtils_h #define mozilla_CSSAlignUtils_h #include "mozilla/WritingModes.h" namespace mozilla { class CSSAlignUtils { public: /** * Flags to customize the behavior of AlignJustifySelf: */ enum class AlignJustifyFlags { eNoFlags = 0, // Indicates that we have <overflow-position> = safe. eOverflowSafe = 1 << 0, // Indicates that the container's start side in aAxis is the same // as the child's start side in the child's parallel axis. eSameSide = 1 << 1, // Indicates that AlignJustifySelf() shouldn't expand "auto" margins. // (By default, AlignJustifySelf() *will* expand such margins, to fill the // available space before any alignment is done.) eIgnoreAutoMargins = 1 << 2, }; /** * This computes the aligned offset of a CSS-aligned child within its * alignment container. The returned offset is distance between the * logical "start" edge of the alignment container & the logical "start" edge * of the aligned child (in terms of the alignment container's writing mode). * * @param aAlignment An enumerated value representing a keyword for * "align-self" or "justify-self". The values * NS_STYLE_ALIGN_{AUTO,LEFT,RIGHT} must *not* be * passed here; this method expects the caller to have * already resolved those to 'start', 'end', or 'stretch'. * @param aAxis The container's axis in which we're doing alignment. * @param aBaselineAdjust The amount to offset baseline-aligned children. * @param aCBSize The size of the alignment container, in its aAxis. * @param aRI A ReflowInput for the child. * @param aChildSize The child's LogicalSize (in its own writing mode). */ static nscoord AlignJustifySelf(uint8_t aAlignment, LogicalAxis aAxis, AlignJustifyFlags aFlags, nscoord aBaselineAdjust, nscoord aCBSize, const ReflowInput& aRI, const LogicalSize& aChildSize); }; MOZ_MAKE_ENUM_CLASS_BITWISE_OPERATORS(CSSAlignUtils::AlignJustifyFlags) } // namespace mozilla #endif // mozilla_CSSAlignUtils_h