layout/generic/CSSOrderAwareFrameIterator.cpp
author Daniel Holbert <dholbert@cs.stanford.edu>
Wed, 05 Apr 2017 19:31:47 -0700
changeset 351531 f6cc0dd3e7b8d90d0b1d29d5835a1bc4075211e4
parent 351530 947d5e737c2d05f038f01ddc2f02a01289db7ba8
child 448947 6f3709b3878117466168c40affa7bca0b60cf75b
permissions -rw-r--r--
Bug 812687 part 4: Add an optional parameter which can make CSSOrderAwareFrameIterator use the legacy "box-ordinal-group" property. r=mats This patch just adds an optional codepath that isn't taken yet, so it shouldn't affect our behavior. (The next patch in the series will make use of this new codepath.) Note: the large code-comment that this patch adds is taken mostly-verbatim from some nsFlexContainerFrame.cpp code. (The original copy will be removed by the next patch in this series, when we switch to take advantage of this new mechanism.) MozReview-Commit-ID: 9pkJ346rrXg

/* -*- 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/. */

/* Iterator class for frame lists that respect CSS "order" during layout */

#include "CSSOrderAwareFrameIterator.h"

namespace mozilla {

template<>
bool
CSSOrderAwareFrameIterator::CSSOrderComparator(nsIFrame* const& a,
                                               nsIFrame* const& b)
{ return a->StylePosition()->mOrder < b->StylePosition()->mOrder; }

template<>
bool
CSSOrderAwareFrameIterator::CSSBoxOrdinalGroupComparator(nsIFrame* const& a,
                                                         nsIFrame* const& b)
{ return a->StyleXUL()->mBoxOrdinal < b->StyleXUL()->mBoxOrdinal; }

template<>
bool
CSSOrderAwareFrameIterator::IsForward() const { return true; }

template<>
nsFrameList::iterator
CSSOrderAwareFrameIterator::begin(const nsFrameList& aList)
{ return aList.begin(); }

template<>
nsFrameList::iterator CSSOrderAwareFrameIterator::end(const nsFrameList& aList)
{ return aList.end(); }

template<>
bool
ReverseCSSOrderAwareFrameIterator::CSSOrderComparator(nsIFrame* const& a,
                                                      nsIFrame* const& b)
{ return a->StylePosition()->mOrder > b->StylePosition()->mOrder; }

template<>
bool
ReverseCSSOrderAwareFrameIterator::CSSBoxOrdinalGroupComparator(nsIFrame* const& a,
                                                                nsIFrame* const& b)
{ return a->StyleXUL()->mBoxOrdinal > b->StyleXUL()->mBoxOrdinal; }

template<>
bool
ReverseCSSOrderAwareFrameIterator::IsForward() const
{ return false; }

template<>
nsFrameList::reverse_iterator
ReverseCSSOrderAwareFrameIterator::begin(const nsFrameList& aList)
{ return aList.rbegin(); }

template<>
nsFrameList::reverse_iterator
ReverseCSSOrderAwareFrameIterator::end(const nsFrameList& aList)
{ return aList.rend(); }

} // namespace mozilla