AspectRatio.cpp (1418B)
1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ 2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */ 3 /* This Source Code Form is subject to the terms of the Mozilla Public 4 * License, v. 2.0. If a copy of the MPL was not distributed with this 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 6 7 #include "AspectRatio.h" 8 9 #include "mozilla/WritingModes.h" 10 11 namespace mozilla { 12 13 nscoord AspectRatio::ComputeRatioDependentSize( 14 LogicalAxis aRatioDependentAxis, const WritingMode& aWM, 15 nscoord aRatioDeterminingSize, 16 const LogicalSize& aContentBoxSizeToBoxSizingAdjust) const { 17 MOZ_ASSERT(*this, 18 "Infinite or zero ratio may have undefined behavior when " 19 "computing the size"); 20 const LogicalSize& boxSizingAdjust = mUseBoxSizing == UseBoxSizing::No 21 ? LogicalSize(aWM) 22 : aContentBoxSizeToBoxSizingAdjust; 23 return aRatioDependentAxis == LogicalAxis::Inline 24 ? ConvertToWritingMode(aWM).ApplyTo(aRatioDeterminingSize + 25 boxSizingAdjust.BSize(aWM)) - 26 boxSizingAdjust.ISize(aWM) 27 : ConvertToWritingMode(aWM).Inverted().ApplyTo( 28 aRatioDeterminingSize + boxSizingAdjust.ISize(aWM)) - 29 boxSizingAdjust.BSize(aWM); 30 } 31 32 } // namespace mozilla