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287eecf10f
MozReview-Commit-ID: LPdvg66adHQ --HG-- extra : rebase_source : 7dbd171a65d9ba057cce48057b82d3f8c143c590
109 lines
3.9 KiB
C++
109 lines
3.9 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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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#include "mozilla/ShapeUtils.h"
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#include <cstdlib>
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#include "nsCSSRendering.h"
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#include "nsRuleNode.h"
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#include "nsStyleCoord.h"
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#include "nsStyleStruct.h"
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#include "SVGContentUtils.h"
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namespace mozilla {
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nscoord
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ShapeUtils::ComputeShapeRadius(const StyleShapeRadius aType,
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const nscoord aCenter,
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const nscoord aPosMin,
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const nscoord aPosMax)
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{
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nscoord dist1 = std::abs(aPosMin - aCenter);
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nscoord dist2 = std::abs(aPosMax - aCenter);
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nscoord length = 0;
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switch (aType) {
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case StyleShapeRadius::FarthestSide:
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length = dist1 > dist2 ? dist1 : dist2;
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break;
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case StyleShapeRadius::ClosestSide:
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length = dist1 > dist2 ? dist2 : dist1;
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break;
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}
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return length;
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}
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nsPoint
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ShapeUtils::ComputeCircleOrEllipseCenter(StyleBasicShape* const aBasicShape,
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const nsRect& aRefBox)
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{
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nsPoint topLeft, anchor;
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nsSize size(aRefBox.Size());
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nsImageRenderer::ComputeObjectAnchorPoint(aBasicShape->GetPosition(),
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size, size,
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&topLeft, &anchor);
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return nsPoint(anchor.x + aRefBox.x, anchor.y + aRefBox.y);
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}
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nscoord
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ShapeUtils::ComputeCircleRadius(StyleBasicShape* const aBasicShape,
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const nsPoint& aCenter,
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const nsRect& aRefBox)
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{
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const nsTArray<nsStyleCoord>& coords = aBasicShape->Coordinates();
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MOZ_ASSERT(coords.Length() == 1, "wrong number of arguments");
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nscoord r = 0;
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if (coords[0].GetUnit() == eStyleUnit_Enumerated) {
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const auto styleShapeRadius = coords[0].GetEnumValue<StyleShapeRadius>();
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nscoord horizontal =
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ComputeShapeRadius(styleShapeRadius, aCenter.x, aRefBox.x, aRefBox.XMost());
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nscoord vertical =
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ComputeShapeRadius(styleShapeRadius, aCenter.y, aRefBox.y, aRefBox.YMost());
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r = styleShapeRadius == StyleShapeRadius::FarthestSide
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? std::max(horizontal, vertical)
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: std::min(horizontal, vertical);
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} else {
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// We resolve percent <shape-radius> value for circle() as defined here:
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// https://drafts.csswg.org/css-shapes/#funcdef-circle
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double referenceLength =
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SVGContentUtils::ComputeNormalizedHypotenuse(aRefBox.width,
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aRefBox.height);
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r = nsRuleNode::ComputeCoordPercentCalc(coords[0],
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NSToCoordRound(referenceLength));
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}
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return r;
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}
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nsSize
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ShapeUtils::ComputeEllipseRadii(StyleBasicShape* const aBasicShape,
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const nsPoint& aCenter,
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const nsRect& aRefBox)
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{
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const nsTArray<nsStyleCoord>& coords = aBasicShape->Coordinates();
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MOZ_ASSERT(coords.Length() == 2, "wrong number of arguments");
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nsSize radii;
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if (coords[0].GetUnit() == eStyleUnit_Enumerated) {
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const StyleShapeRadius radiusX = coords[0].GetEnumValue<StyleShapeRadius>();
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radii.width = ComputeShapeRadius(radiusX, aCenter.x, aRefBox.x,
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aRefBox.XMost());
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} else {
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radii.width = nsRuleNode::ComputeCoordPercentCalc(coords[0], aRefBox.width);
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}
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if (coords[1].GetUnit() == eStyleUnit_Enumerated) {
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const StyleShapeRadius radiusY = coords[1].GetEnumValue<StyleShapeRadius>();
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radii.height = ComputeShapeRadius(radiusY, aCenter.y, aRefBox.y,
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aRefBox.YMost());
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} else {
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radii.height = nsRuleNode::ComputeCoordPercentCalc(coords[1], aRefBox.height);
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}
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return radii;
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}
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} // namespace mozilla
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