зеркало из https://github.com/mozilla/gecko-dev.git
61 строка
1.7 KiB
C++
61 строка
1.7 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef GFX_DIRECTIONUTILS_H
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#define GFX_DIRECTIONUTILS_H
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#include "LayersTypes.h" // for ScrollDirection
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#include "Units.h" // for Coord, Point, and Rect types
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namespace mozilla {
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namespace layers {
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template <typename PointOrRect>
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CoordOf<PointOrRect> GetAxisStart(ScrollDirection aDir, const PointOrRect& aValue) {
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if (aDir == ScrollDirection::HORIZONTAL) {
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return aValue.x;
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} else {
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return aValue.y;
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}
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}
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template <typename Rect>
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CoordOf<Rect> GetAxisEnd(ScrollDirection aDir, const Rect& aValue) {
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if (aDir == ScrollDirection::HORIZONTAL) {
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return aValue.x + aValue.width;
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} else {
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return aValue.y + aValue.height;
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}
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}
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template <typename Rect>
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CoordOf<Rect> GetAxisLength(ScrollDirection aDir, const Rect& aValue) {
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if (aDir == ScrollDirection::HORIZONTAL) {
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return aValue.width;
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} else {
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return aValue.height;
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}
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}
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template <typename FromUnits, typename ToUnits>
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float GetAxisScale(ScrollDirection aDir, const gfx::ScaleFactors2D<FromUnits, ToUnits>& aValue) {
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if (aDir == ScrollDirection::HORIZONTAL) {
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return aValue.xScale;
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} else {
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return aValue.yScale;
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}
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}
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inline ScrollDirection GetPerpendicularDirection(ScrollDirection aDir) {
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return aDir == ScrollDirection::HORIZONTAL
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? ScrollDirection::VERTICAL
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: ScrollDirection::HORIZONTAL;
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}
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} // namespace layers
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} // namespace mozilla
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#endif /* GFX_DIRECTIONUTILS_H */
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