layout/generic/ColumnUtils.h
author Dragana Damjanovic <dd.mozilla@gmail.com>
Thu, 06 May 2021 18:10:45 +0000
changeset 578757 c9980e971a31b2bd47783dc4a9a26fca4a4c57d6
parent 480516 e0af0c6328746dd6eefa01c51c502ef583c99953
permissions -rw-r--r--
Bug 1708678 - Adapt code to neqo 0.4.24 r=necko-reviewers,valentin Differential Revision: https://phabricator.services.mozilla.com/D114011

/* -*- 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/. */

/* A namespace class for static muti-column utilities. */

#ifndef mozilla_ColumnUtils_h
#define mozilla_ColumnUtils_h

#include "nsCoord.h"
#include "nsStyleConsts.h"

class nsContainerFrame;

namespace mozilla {

// ColumnUtils is a namespace class containing utility functions used by
// multi-column containers like ColumnSetWrapperFrame and nsColumnSetFrame.
//
class ColumnUtils final {
 public:
  // Compute used value of 'column-gap' for aFrame.
  static nscoord GetColumnGap(const nsContainerFrame* aFrame,
                              nscoord aPercentageBasis);

  // Clamp used column width to a minimum of 1px.
  static nscoord ClampUsedColumnWidth(const Length& aColumnWidth);

  // Compute the intrinsic inline-size of a column container, given a non-zero
  // column-count, column gap, and column box's inline-size.
  static nscoord IntrinsicISize(uint32_t aColCount, nscoord aColGap,
                                nscoord aColISize);
};

}  // namespace mozilla

#endif  // mozilla_ColumnUtils_h