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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/. */
#include "AspectRatio.h"
#include "mozilla/WritingModes.h"
namespace mozilla {
nscoord AspectRatio::ComputeRatioDependentSize(
LogicalAxis aRatioDependentAxis, const WritingMode& aWM,
nscoord aRatioDeterminingSize,
const LogicalSize& aContentBoxSizeToBoxSizingAdjust) const {
MOZ_ASSERT(*this,
"Infinite or zero ratio may have undefined behavior when "
"computing the size");
const LogicalSize& boxSizingAdjust = mUseBoxSizing == UseBoxSizing::No
? LogicalSize(aWM)
: aContentBoxSizeToBoxSizingAdjust;
return aRatioDependentAxis == LogicalAxis::eLogicalAxisInline
? ConvertToWritingMode(aWM).ApplyTo(aRatioDeterminingSize +
boxSizingAdjust.BSize(aWM)) -
boxSizingAdjust.ISize(aWM)
: ConvertToWritingMode(aWM).Inverted().ApplyTo(
aRatioDeterminingSize + boxSizingAdjust.ISize(aWM)) -
boxSizingAdjust.BSize(aWM);
}
} // namespace mozilla