mirror of
https://github.com/classilla/tenfourfox.git
synced 2024-08-15 02:29:04 +00:00
399 lines
12 KiB
C++
399 lines
12 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/dom/SVGPathElement.h"
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#include <algorithm>
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#include "DOMSVGPathSeg.h"
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#include "DOMSVGPathSegList.h"
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#include "DOMSVGPoint.h"
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#include "gfx2DGlue.h"
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#include "gfxPlatform.h"
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#include "mozilla/dom/SVGPathElementBinding.h"
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#include "mozilla/gfx/2D.h"
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#include "mozilla/RefPtr.h"
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#include "nsCOMPtr.h"
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#include "nsComputedDOMStyle.h"
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#include "nsGkAtoms.h"
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#include "nsStyleConsts.h"
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#include "nsStyleStruct.h"
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#include "SVGContentUtils.h"
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NS_IMPL_NS_NEW_NAMESPACED_SVG_ELEMENT(Path)
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using namespace mozilla::gfx;
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namespace mozilla {
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namespace dom {
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JSObject*
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SVGPathElement::WrapNode(JSContext *aCx, JS::Handle<JSObject*> aGivenProto)
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{
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return SVGPathElementBinding::Wrap(aCx, this, aGivenProto);
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}
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nsSVGElement::NumberInfo SVGPathElement::sNumberInfo =
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{ &nsGkAtoms::pathLength, 0, false };
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//----------------------------------------------------------------------
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// Implementation
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SVGPathElement::SVGPathElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo)
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: SVGPathElementBase(aNodeInfo)
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{
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}
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//----------------------------------------------------------------------
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// memory reporting methods
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size_t
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SVGPathElement::SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
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{
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return SVGPathElementBase::SizeOfExcludingThis(aMallocSizeOf) +
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mD.SizeOfExcludingThis(aMallocSizeOf);
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}
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//----------------------------------------------------------------------
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// nsIDOMNode methods
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NS_IMPL_ELEMENT_CLONE_WITH_INIT(SVGPathElement)
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already_AddRefed<SVGAnimatedNumber>
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SVGPathElement::PathLength()
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{
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return mPathLength.ToDOMAnimatedNumber(this);
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}
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float
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SVGPathElement::GetTotalLength()
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{
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RefPtr<Path> flat = GetOrBuildPathForMeasuring();
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return flat ? flat->ComputeLength() : 0.f;
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}
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already_AddRefed<nsISVGPoint>
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SVGPathElement::GetPointAtLength(float distance, ErrorResult& rv)
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{
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RefPtr<Path> path = GetOrBuildPathForMeasuring();
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if (!path) {
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rv.Throw(NS_ERROR_FAILURE);
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return nullptr;
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}
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float totalLength = path->ComputeLength();
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if (mPathLength.IsExplicitlySet()) {
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float pathLength = mPathLength.GetAnimValue();
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if (pathLength <= 0) {
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rv.Throw(NS_ERROR_FAILURE);
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return nullptr;
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}
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distance *= totalLength / pathLength;
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}
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distance = std::max(0.f, distance);
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distance = std::min(totalLength, distance);
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nsCOMPtr<nsISVGPoint> point =
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new DOMSVGPoint(path->ComputePointAtLength(distance));
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return point.forget();
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}
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uint32_t
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SVGPathElement::GetPathSegAtLength(float distance)
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{
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return mD.GetAnimValue().GetPathSegAtLength(distance);
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}
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already_AddRefed<DOMSVGPathSegClosePath>
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SVGPathElement::CreateSVGPathSegClosePath()
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{
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RefPtr<DOMSVGPathSegClosePath> pathSeg = new DOMSVGPathSegClosePath();
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return pathSeg.forget();
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}
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already_AddRefed<DOMSVGPathSegMovetoAbs>
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SVGPathElement::CreateSVGPathSegMovetoAbs(float x, float y)
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{
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RefPtr<DOMSVGPathSegMovetoAbs> pathSeg = new DOMSVGPathSegMovetoAbs(x, y);
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return pathSeg.forget();
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}
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already_AddRefed<DOMSVGPathSegMovetoRel>
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SVGPathElement::CreateSVGPathSegMovetoRel(float x, float y)
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{
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RefPtr<DOMSVGPathSegMovetoRel> pathSeg = new DOMSVGPathSegMovetoRel(x, y);
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return pathSeg.forget();
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}
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already_AddRefed<DOMSVGPathSegLinetoAbs>
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SVGPathElement::CreateSVGPathSegLinetoAbs(float x, float y)
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{
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RefPtr<DOMSVGPathSegLinetoAbs> pathSeg = new DOMSVGPathSegLinetoAbs(x, y);
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return pathSeg.forget();
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}
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already_AddRefed<DOMSVGPathSegLinetoRel>
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SVGPathElement::CreateSVGPathSegLinetoRel(float x, float y)
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{
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RefPtr<DOMSVGPathSegLinetoRel> pathSeg = new DOMSVGPathSegLinetoRel(x, y);
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return pathSeg.forget();
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}
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already_AddRefed<DOMSVGPathSegCurvetoCubicAbs>
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SVGPathElement::CreateSVGPathSegCurvetoCubicAbs(float x, float y, float x1, float y1, float x2, float y2)
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{
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// Note that we swap from DOM API argument order to the argument order used
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// in the <path> element's 'd' attribute (i.e. we put the arguments for the
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// end point of the segment last instead of first).
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RefPtr<DOMSVGPathSegCurvetoCubicAbs> pathSeg =
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new DOMSVGPathSegCurvetoCubicAbs(x1, y1, x2, y2, x, y);
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return pathSeg.forget();
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}
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already_AddRefed<DOMSVGPathSegCurvetoCubicRel>
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SVGPathElement::CreateSVGPathSegCurvetoCubicRel(float x, float y, float x1, float y1, float x2, float y2)
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{
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// See comment in CreateSVGPathSegCurvetoCubicAbs
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RefPtr<DOMSVGPathSegCurvetoCubicRel> pathSeg =
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new DOMSVGPathSegCurvetoCubicRel(x1, y1, x2, y2, x, y);
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return pathSeg.forget();
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}
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already_AddRefed<DOMSVGPathSegCurvetoQuadraticAbs>
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SVGPathElement::CreateSVGPathSegCurvetoQuadraticAbs(float x, float y, float x1, float y1)
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{
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// See comment in CreateSVGPathSegCurvetoCubicAbs
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RefPtr<DOMSVGPathSegCurvetoQuadraticAbs> pathSeg =
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new DOMSVGPathSegCurvetoQuadraticAbs(x1, y1, x, y);
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return pathSeg.forget();
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}
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already_AddRefed<DOMSVGPathSegCurvetoQuadraticRel>
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SVGPathElement::CreateSVGPathSegCurvetoQuadraticRel(float x, float y, float x1, float y1)
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{
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// See comment in CreateSVGPathSegCurvetoCubicAbs
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RefPtr<DOMSVGPathSegCurvetoQuadraticRel> pathSeg =
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new DOMSVGPathSegCurvetoQuadraticRel(x1, y1, x, y);
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return pathSeg.forget();
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}
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already_AddRefed<DOMSVGPathSegArcAbs>
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SVGPathElement::CreateSVGPathSegArcAbs(float x, float y, float r1, float r2, float angle, bool largeArcFlag, bool sweepFlag)
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{
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// See comment in CreateSVGPathSegCurvetoCubicAbs
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RefPtr<DOMSVGPathSegArcAbs> pathSeg =
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new DOMSVGPathSegArcAbs(r1, r2, angle, largeArcFlag, sweepFlag, x, y);
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return pathSeg.forget();
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}
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already_AddRefed<DOMSVGPathSegArcRel>
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SVGPathElement::CreateSVGPathSegArcRel(float x, float y, float r1, float r2, float angle, bool largeArcFlag, bool sweepFlag)
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{
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// See comment in CreateSVGPathSegCurvetoCubicAbs
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RefPtr<DOMSVGPathSegArcRel> pathSeg =
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new DOMSVGPathSegArcRel(r1, r2, angle, largeArcFlag, sweepFlag, x, y);
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return pathSeg.forget();
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}
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already_AddRefed<DOMSVGPathSegLinetoHorizontalAbs>
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SVGPathElement::CreateSVGPathSegLinetoHorizontalAbs(float x)
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{
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RefPtr<DOMSVGPathSegLinetoHorizontalAbs> pathSeg =
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new DOMSVGPathSegLinetoHorizontalAbs(x);
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return pathSeg.forget();
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}
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already_AddRefed<DOMSVGPathSegLinetoHorizontalRel>
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SVGPathElement::CreateSVGPathSegLinetoHorizontalRel(float x)
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{
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RefPtr<DOMSVGPathSegLinetoHorizontalRel> pathSeg =
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new DOMSVGPathSegLinetoHorizontalRel(x);
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return pathSeg.forget();
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}
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already_AddRefed<DOMSVGPathSegLinetoVerticalAbs>
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SVGPathElement::CreateSVGPathSegLinetoVerticalAbs(float y)
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{
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RefPtr<DOMSVGPathSegLinetoVerticalAbs> pathSeg =
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new DOMSVGPathSegLinetoVerticalAbs(y);
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return pathSeg.forget();
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}
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already_AddRefed<DOMSVGPathSegLinetoVerticalRel>
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SVGPathElement::CreateSVGPathSegLinetoVerticalRel(float y)
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{
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RefPtr<DOMSVGPathSegLinetoVerticalRel> pathSeg =
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new DOMSVGPathSegLinetoVerticalRel(y);
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return pathSeg.forget();
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}
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already_AddRefed<DOMSVGPathSegCurvetoCubicSmoothAbs>
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SVGPathElement::CreateSVGPathSegCurvetoCubicSmoothAbs(float x, float y, float x2, float y2)
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{
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// See comment in CreateSVGPathSegCurvetoCubicAbs
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RefPtr<DOMSVGPathSegCurvetoCubicSmoothAbs> pathSeg =
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new DOMSVGPathSegCurvetoCubicSmoothAbs(x2, y2, x, y);
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return pathSeg.forget();
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}
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already_AddRefed<DOMSVGPathSegCurvetoCubicSmoothRel>
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SVGPathElement::CreateSVGPathSegCurvetoCubicSmoothRel(float x, float y, float x2, float y2)
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{
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// See comment in CreateSVGPathSegCurvetoCubicAbs
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RefPtr<DOMSVGPathSegCurvetoCubicSmoothRel> pathSeg =
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new DOMSVGPathSegCurvetoCubicSmoothRel(x2, y2, x, y);
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return pathSeg.forget();
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}
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already_AddRefed<DOMSVGPathSegCurvetoQuadraticSmoothAbs>
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SVGPathElement::CreateSVGPathSegCurvetoQuadraticSmoothAbs(float x, float y)
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{
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RefPtr<DOMSVGPathSegCurvetoQuadraticSmoothAbs> pathSeg =
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new DOMSVGPathSegCurvetoQuadraticSmoothAbs(x, y);
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return pathSeg.forget();
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}
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already_AddRefed<DOMSVGPathSegCurvetoQuadraticSmoothRel>
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SVGPathElement::CreateSVGPathSegCurvetoQuadraticSmoothRel(float x, float y)
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{
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RefPtr<DOMSVGPathSegCurvetoQuadraticSmoothRel> pathSeg =
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new DOMSVGPathSegCurvetoQuadraticSmoothRel(x, y);
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return pathSeg.forget();
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}
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already_AddRefed<DOMSVGPathSegList>
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SVGPathElement::PathSegList()
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{
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return DOMSVGPathSegList::GetDOMWrapper(mD.GetBaseValKey(), this, false);
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}
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already_AddRefed<DOMSVGPathSegList>
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SVGPathElement::AnimatedPathSegList()
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{
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return DOMSVGPathSegList::GetDOMWrapper(mD.GetAnimValKey(), this, true);
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}
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//----------------------------------------------------------------------
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// nsSVGElement methods
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/* virtual */ bool
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SVGPathElement::HasValidDimensions() const
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{
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return !mD.GetAnimValue().IsEmpty();
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}
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nsSVGElement::NumberAttributesInfo
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SVGPathElement::GetNumberInfo()
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{
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return NumberAttributesInfo(&mPathLength, &sNumberInfo, 1);
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}
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//----------------------------------------------------------------------
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// nsIContent methods
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NS_IMETHODIMP_(bool)
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SVGPathElement::IsAttributeMapped(const nsIAtom* name) const
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{
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static const MappedAttributeEntry* const map[] = {
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sMarkersMap
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};
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return FindAttributeDependence(name, map) ||
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SVGPathElementBase::IsAttributeMapped(name);
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}
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already_AddRefed<Path>
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SVGPathElement::GetOrBuildPathForMeasuring()
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{
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return mD.GetAnimValue().BuildPathForMeasuring();
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}
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//----------------------------------------------------------------------
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// nsSVGPathGeometryElement methods
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bool
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SVGPathElement::AttributeDefinesGeometry(const nsIAtom *aName)
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{
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return aName == nsGkAtoms::d ||
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aName == nsGkAtoms::pathLength;
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}
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bool
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SVGPathElement::IsMarkable()
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{
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return true;
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}
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void
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SVGPathElement::GetMarkPoints(nsTArray<nsSVGMark> *aMarks)
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{
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mD.GetAnimValue().GetMarkerPositioningData(aMarks);
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}
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float
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SVGPathElement::GetPathLengthScale(PathLengthScaleForType aFor)
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{
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MOZ_ASSERT(aFor == eForTextPath || aFor == eForStroking,
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"Unknown enum");
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if (mPathLength.IsExplicitlySet()) {
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float authorsPathLengthEstimate = mPathLength.GetAnimValue();
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if (authorsPathLengthEstimate > 0) {
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RefPtr<Path> path = GetOrBuildPathForMeasuring();
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if (!path) {
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// The path is empty or invalid so its length must be zero and
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// we know that 0 / authorsPathLengthEstimate = 0.
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return 0.0;
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}
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if (aFor == eForTextPath) {
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// For textPath, a transform on the referenced path affects the
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// textPath layout, so when calculating the actual path length
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// we need to take that into account.
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gfxMatrix matrix = PrependLocalTransformsTo(gfxMatrix());
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if (!matrix.IsIdentity()) {
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RefPtr<PathBuilder> builder =
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path->TransformedCopyToBuilder(ToMatrix(matrix));
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path = builder->Finish();
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}
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}
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return path->ComputeLength() / authorsPathLengthEstimate;
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}
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}
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return 1.0;
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}
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already_AddRefed<Path>
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SVGPathElement::BuildPath(PathBuilder* aBuilder)
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{
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// The Moz2D PathBuilder that our SVGPathData will be using only cares about
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// the fill rule. However, in order to fulfill the requirements of the SVG
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// spec regarding zero length sub-paths when square line caps are in use,
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// SVGPathData needs to know our stroke-linecap style and, if "square", then
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// also our stroke width. See the comment for
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// ApproximateZeroLengthSubpathSquareCaps for more info.
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uint8_t strokeLineCap = NS_STYLE_STROKE_LINECAP_BUTT;
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Float strokeWidth = 0;
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RefPtr<nsStyleContext> styleContext =
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nsComputedDOMStyle::GetStyleContextForElementNoFlush(this, nullptr, nullptr);
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if (styleContext) {
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const nsStyleSVG* style = styleContext->StyleSVG();
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// Note: the path that we return may be used for hit-testing, and SVG
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// exposes hit-testing of strokes that are not actually painted. For that
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// reason we do not check for eStyleSVGPaintType_None or check the stroke
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// opacity here.
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if (style->mStrokeLinecap != NS_STYLE_STROKE_LINECAP_BUTT) {
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strokeLineCap = style->mStrokeLinecap;
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strokeWidth = SVGContentUtils::GetStrokeWidth(this, styleContext, nullptr);
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}
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}
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return mD.GetAnimValue().BuildPath(aBuilder, strokeLineCap, strokeWidth);
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}
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} // namespace dom
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} // namespace mozilla
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