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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 "SVGAnimatedPathSegList.h"
#include <utility>
#include "SVGPathSegListSMILType.h"
#include "mozilla/SMILValue.h"
#include "mozilla/StaticPrefs_dom.h"
#include "mozilla/dom/SVGElement.h"
#include "mozilla/dom/SVGPathElementBinding.h"
#include "mozilla/dom/SVGPathSegment.h"
using namespace mozilla::dom;
// See the comments in this file's header!
namespace mozilla {
nsresult SVGAnimatedPathSegList::SetBaseValueString(const nsAString& aValue) {
// We don't need to call DidChange* here - we're only called by
// SVGElement::ParseAttribute under Element::SetAttr,
// which takes care of notifying.
return mBaseVal.SetValueFromString(NS_ConvertUTF16toUTF8(aValue));
}
class MOZ_STACK_CLASS SVGPathSegmentInitWrapper final {
public:
explicit SVGPathSegmentInitWrapper(const SVGPathSegmentInit& aSVGPathSegment)
: mInit(aSVGPathSegment) {}
bool IsMove() const {
return mInit.mType.EqualsLiteral("M") || mInit.mType.EqualsLiteral("m");
}
bool IsArc() const {
return mInit.mType.EqualsLiteral("A") || mInit.mType.EqualsLiteral("a");
}
bool IsValid() const {
if (mInit.mType.Length() != 1) {
return false;
}
auto expectedArgCount = ArgCountForType(mInit.mType.First());
if (expectedArgCount < 0 ||
mInit.mValues.Length() != uint32_t(expectedArgCount)) {
return false;
}
if (IsArc() &&
!(IsValidFlag(mInit.mValues[3]) && IsValidFlag(mInit.mValues[4]))) {
return false;
}
return true;
}
StylePathCommand ToStylePathCommand() const {
MOZ_ASSERT(IsValid(), "Trying to convert invalid SVGPathSegment");
switch (mInit.mType.First()) {
case 'M':
return StylePathCommand::Move(StyleByTo::To,
{mInit.mValues[0], mInit.mValues[1]});
case 'm':
return StylePathCommand::Move(StyleByTo::By,
{mInit.mValues[0], mInit.mValues[1]});
case 'L':
return StylePathCommand::Line(StyleByTo::To,
{mInit.mValues[0], mInit.mValues[1]});
case 'l':
return StylePathCommand::Line(StyleByTo::By,
{mInit.mValues[0], mInit.mValues[1]});
case 'C':
return StylePathCommand::CubicCurve(
StyleByTo::To, {mInit.mValues[4], mInit.mValues[5]},
{mInit.mValues[0], mInit.mValues[1]},
{mInit.mValues[2], mInit.mValues[3]});
case 'c':
return StylePathCommand::CubicCurve(
StyleByTo::By, {mInit.mValues[4], mInit.mValues[5]},
{mInit.mValues[0], mInit.mValues[1]},
{mInit.mValues[2], mInit.mValues[3]});
case 'Q':
return StylePathCommand::QuadCurve(
StyleByTo::To, {mInit.mValues[2], mInit.mValues[3]},
{mInit.mValues[0], mInit.mValues[1]});
case 'q':
return StylePathCommand::QuadCurve(
StyleByTo::By, {mInit.mValues[2], mInit.mValues[3]},
{mInit.mValues[0], mInit.mValues[1]});
case 'A':
return StylePathCommand::Arc(
StyleByTo::To, {mInit.mValues[5], mInit.mValues[6]},
{mInit.mValues[0], mInit.mValues[1]},
mInit.mValues[4] ? StyleArcSweep::Cw : StyleArcSweep::Ccw,
mInit.mValues[3] ? StyleArcSize::Large : StyleArcSize::Small,
mInit.mValues[2]);
case 'a':
return StylePathCommand::Arc(
StyleByTo::By, {mInit.mValues[5], mInit.mValues[6]},
{mInit.mValues[0], mInit.mValues[1]},
mInit.mValues[4] ? StyleArcSweep::Cw : StyleArcSweep::Ccw,
mInit.mValues[3] ? StyleArcSize::Large : StyleArcSize::Small,
mInit.mValues[2]);
case 'H':
return StylePathCommand::HLine(StyleByTo::To, mInit.mValues[0]);
case 'h':
return StylePathCommand::HLine(StyleByTo::By, mInit.mValues[0]);
case 'V':
return StylePathCommand::VLine(StyleByTo::To, mInit.mValues[0]);
case 'v':
return StylePathCommand::VLine(StyleByTo::By, mInit.mValues[0]);
case 'S':
return StylePathCommand::SmoothCubic(
StyleByTo::To, {mInit.mValues[2], mInit.mValues[3]},
{mInit.mValues[0], mInit.mValues[1]});
case 's':
return StylePathCommand::SmoothCubic(
StyleByTo::By, {mInit.mValues[2], mInit.mValues[3]},
{mInit.mValues[0], mInit.mValues[1]});
case 'T':
return StylePathCommand::SmoothQuad(
StyleByTo::To, {mInit.mValues[0], mInit.mValues[1]});
case 't':
return StylePathCommand::SmoothQuad(
StyleByTo::By, {mInit.mValues[0], mInit.mValues[1]});
}
return StylePathCommand::Close();
}
private:
static bool IsValidFlag(float aFlag) {
return aFlag == 0.0f || aFlag == 1.0f;
}
static int32_t ArgCountForType(char aType) {
switch (ToLowerCase(aType)) {
case 'z':
return 0;
case 'm':
case 'l':
return 2;
case 'c':
return 6;
case 'q':
return 4;
case 'a':
return 7;
case 'h':
case 'v':
return 1;
case 's':
return 4;
case 't':
return 2;
}
return -1;
}
const SVGPathSegmentInit& mInit;
};
void SVGAnimatedPathSegList::SetBaseValueFromPathSegments(
const Sequence<SVGPathSegmentInit>& aValues) {
AutoTArray<StylePathCommand, 10> pathData;
if (!aValues.IsEmpty() && SVGPathSegmentInitWrapper(aValues[0]).IsMove()) {
for (const auto& value : aValues) {
SVGPathSegmentInitWrapper seg(value);
if (!seg.IsValid()) {
break;
}
pathData.AppendElement(seg.ToStylePathCommand());
}
}
if (pathData.IsEmpty()) {
mBaseVal.Clear();
return;
}
Servo_CreatePathDataFromCommands(&pathData, &mBaseVal.RawData());
}
void SVGAnimatedPathSegList::ClearBaseValue() {
mBaseVal.Clear();
// Caller notifies
}
nsresult SVGAnimatedPathSegList::SetAnimValue(const SVGPathData& aNewAnimValue,
SVGElement* aElement) {
// Note that a new animation may totally change the number of items in the
// animVal list, either replacing what was essentially a mirror of the
// baseVal list, or else replacing and overriding an existing animation.
// Unfortunately it is not possible for us to reliably distinguish between
// calls to this method that are setting a new sample for an existing
// animation, and calls that are setting the first sample of an animation
// that will override an existing animation.
if (!mAnimVal) {
mAnimVal = MakeUnique<SVGPathData>();
}
*mAnimVal = aNewAnimValue;
aElement->DidAnimatePathSegList();
return NS_OK;
}
void SVGAnimatedPathSegList::ClearAnimValue(SVGElement* aElement) {
mAnimVal = nullptr;
aElement->DidAnimatePathSegList();
}
bool SVGAnimatedPathSegList::IsRendered() const {
return mAnimVal ? !mAnimVal->IsEmpty() : !mBaseVal.IsEmpty();
}
UniquePtr<SMILAttr> SVGAnimatedPathSegList::ToSMILAttr(SVGElement* aElement) {
return MakeUnique<SMILAnimatedPathSegList>(this, aElement);
}
nsresult SVGAnimatedPathSegList::SMILAnimatedPathSegList::ValueFromString(
const nsAString& aStr, const dom::SVGAnimationElement* /*aSrcElement*/,
SMILValue& aValue, bool& aPreventCachingOfSandwich) const {
SMILValue val(SVGPathSegListSMILType::Singleton());
SVGPathDataAndInfo* list = static_cast<SVGPathDataAndInfo*>(val.mU.mPtr);
nsresult rv = list->SetValueFromString(NS_ConvertUTF16toUTF8(aStr));
if (NS_SUCCEEDED(rv)) {
list->SetElement(mElement);
aValue = std::move(val);
}
return rv;
}
SMILValue SVGAnimatedPathSegList::SMILAnimatedPathSegList::GetBaseValue()
const {
// To benefit from Return Value Optimization and avoid copy constructor calls
// due to our use of return-by-value, we must return the exact same object
// from ALL return points. This function must only return THIS variable:
SMILValue tmp(SVGPathSegListSMILType::Singleton());
auto* list = static_cast<SVGPathDataAndInfo*>(tmp.mU.mPtr);
list->CopyFrom(mVal->mBaseVal);
list->SetElement(mElement);
return tmp;
}
nsresult SVGAnimatedPathSegList::SMILAnimatedPathSegList::SetAnimValue(
const SMILValue& aValue) {
NS_ASSERTION(aValue.mType == SVGPathSegListSMILType::Singleton(),
"Unexpected type to assign animated value");
if (aValue.mType == SVGPathSegListSMILType::Singleton()) {
mVal->SetAnimValue(*static_cast<SVGPathDataAndInfo*>(aValue.mU.mPtr),
mElement);
}
return NS_OK;
}
void SVGAnimatedPathSegList::SMILAnimatedPathSegList::ClearAnimValue() {
if (mVal->mAnimVal) {
mVal->ClearAnimValue(mElement);
}
}
size_t SVGAnimatedPathSegList::SizeOfExcludingThis(
MallocSizeOf aMallocSizeOf) const {
size_t total = mBaseVal.SizeOfExcludingThis(aMallocSizeOf);
if (mAnimVal) {
mAnimVal->SizeOfIncludingThis(aMallocSizeOf);
}
return total;
}
} // namespace mozilla
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