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The Tor Browser
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SVGAnimatedString.cpp (3846B)

      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 "SVGAnimatedString.h"
      8 
      9 #include <utility>
     10 
     11 #include "SMILStringType.h"
     12 #include "SVGAttrTearoffTable.h"
     13 #include "mozilla/SMILValue.h"
     14 #include "mozilla/dom/TrustedTypeUtils.h"
     15 #include "mozilla/dom/TrustedTypesConstants.h"
     16 
     17 using namespace mozilla::dom;
     18 
     19 namespace mozilla {
     20 
     21 /* Implementation */
     22 
     23 void SVGAnimatedString::SetBaseValue(const nsAString& aValue,
     24                                     SVGElement* aSVGElement, bool aDoSetAttr) {
     25  NS_ASSERTION(aSVGElement, "Null element passed to SetBaseValue");
     26 
     27  mIsBaseSet = true;
     28  if (aDoSetAttr) {
     29    aSVGElement->SetStringBaseValue(mAttrEnum, aValue);
     30  }
     31  if (mAnimVal) {
     32    aSVGElement->AnimationNeedsResample();
     33  }
     34 
     35  aSVGElement->DidChangeString(mAttrEnum);
     36 }
     37 
     38 void SVGAnimatedString::GetAnimValue(nsAString& aResult,
     39                                     const SVGElement* aSVGElement) const {
     40  if (mAnimVal) {
     41    aResult = *mAnimVal;
     42    return;
     43  }
     44 
     45  aSVGElement->GetStringBaseValue(mAttrEnum, aResult);
     46 }
     47 
     48 void SVGAnimatedString::SetAnimValue(const nsAString& aValue,
     49                                     SVGElement* aSVGElement) {
     50  if (aSVGElement->IsStringAnimatable(mAttrEnum)) {
     51    if (mAnimVal && mAnimVal->Equals(aValue)) {
     52      return;
     53    }
     54    if (!mAnimVal) {
     55      mAnimVal = MakeUnique<nsString>();
     56    }
     57    *mAnimVal = aValue;
     58    aSVGElement->DidAnimateString(mAttrEnum);
     59  }
     60 }
     61 
     62 UniquePtr<SMILAttr> SVGAnimatedString::ToSMILAttr(SVGElement* aSVGElement) {
     63  return MakeUnique<SMILString>(this, aSVGElement);
     64 }
     65 
     66 nsresult SVGAnimatedString::SMILString::ValueFromString(
     67    const nsAString& aStr, const dom::SVGAnimationElement* /*aSrcElement*/,
     68    SMILValue& aValue, bool& aPreventCachingOfSandwich) const {
     69  SMILValue val(SMILStringType::Singleton());
     70 
     71  *static_cast<nsAString*>(val.mU.mPtr) = aStr;
     72  aValue = std::move(val);
     73  return NS_OK;
     74 }
     75 
     76 SMILValue SVGAnimatedString::SMILString::GetBaseValue() const {
     77  SMILValue val(SMILStringType::Singleton());
     78  mSVGElement->GetStringBaseValue(mVal->mAttrEnum,
     79                                  *static_cast<nsAString*>(val.mU.mPtr));
     80  return val;
     81 }
     82 
     83 void SVGAnimatedString::SMILString::ClearAnimValue() {
     84  if (mVal->mAnimVal) {
     85    mVal->mAnimVal = nullptr;
     86    mSVGElement->DidAnimateString(mVal->mAttrEnum);
     87  }
     88 }
     89 
     90 nsresult SVGAnimatedString::SMILString::SetAnimValue(const SMILValue& aValue) {
     91  NS_ASSERTION(aValue.mType == SMILStringType::Singleton(),
     92               "Unexpected type to assign animated value");
     93  if (aValue.mType == SMILStringType::Singleton()) {
     94    mVal->SetAnimValue(*static_cast<nsAString*>(aValue.mU.mPtr), mSVGElement);
     95  }
     96  return NS_OK;
     97 }
     98 
     99 void SVGAnimatedScriptHrefString::SetBaseValue(
    100    const TrustedScriptURLOrString& aValue, SVGElement* aSVGElement,
    101    bool aDoSetAttr, nsIPrincipal* aSubjectPrincipal, ErrorResult& aRv) {
    102  // https://svgwg.org/svg2-draft/single-page.html#types-InterfaceSVGAnimatedString
    103  // See https://github.com/w3c/svgwg/pull/934
    104  MOZ_ASSERT(aSVGElement->IsSVGElement(nsGkAtoms::script));
    105  nsCOMPtr<SVGElement> svgElement = aSVGElement;
    106  constexpr nsLiteralString sink = u"SVGScriptElement href"_ns;
    107  Maybe<nsAutoString> compliantStringHolder;
    108  const nsAString* compliantString =
    109      TrustedTypeUtils::GetTrustedTypesCompliantString(
    110          aValue, sink, kTrustedTypesOnlySinkGroup, *svgElement,
    111          aSubjectPrincipal, compliantStringHolder, aRv);
    112  if (aRv.Failed()) {
    113    return;
    114  }
    115  SVGAnimatedString::SetBaseValue(*compliantString, aSVGElement, aDoSetAttr);
    116 }
    117 
    118 }  // namespace mozilla