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CSSMathSum.cpp (3220B)

      1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* vim:set ts=2 sw=2 sts=2 et cindent: */
      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 "mozilla/dom/CSSMathSum.h"
      8 
      9 #include "mozilla/AlreadyAddRefed.h"
     10 #include "mozilla/ErrorResult.h"
     11 #include "mozilla/dom/BindingDeclarations.h"
     12 #include "mozilla/dom/CSSMathSumBinding.h"
     13 #include "mozilla/dom/CSSNumericArray.h"
     14 #include "mozilla/dom/CSSNumericValueBinding.h"
     15 #include "mozilla/dom/CSSUnitValue.h"
     16 #include "nsString.h"
     17 
     18 namespace mozilla::dom {
     19 
     20 CSSMathSum::CSSMathSum(nsCOMPtr<nsISupports> aParent,
     21                       RefPtr<CSSNumericArray> aValues)
     22    : CSSMathValue(std::move(aParent), ValueType::MathSum),
     23      mValues(std::move(aValues)) {}
     24 
     25 NS_IMPL_ISUPPORTS_CYCLE_COLLECTION_INHERITED_0(CSSMathSum, CSSMathValue)
     26 NS_IMPL_CYCLE_COLLECTION_INHERITED(CSSMathSum, CSSMathValue, mValues)
     27 
     28 JSObject* CSSMathSum::WrapObject(JSContext* aCx,
     29                                 JS::Handle<JSObject*> aGivenProto) {
     30  return CSSMathSum_Binding::Wrap(aCx, this, aGivenProto);
     31 }
     32 
     33 // start of CSSMathSum Web IDL implementation
     34 
     35 // https://www.w3.org/TR/css-typed-om-1/#dom-cssmathsum-cssmathsum
     36 //
     37 // static
     38 already_AddRefed<CSSMathSum> CSSMathSum::Constructor(
     39    const GlobalObject& aGlobal, const Sequence<OwningCSSNumberish>& aArgs,
     40    ErrorResult& aRv) {
     41  nsCOMPtr<nsISupports> global = aGlobal.GetAsSupports();
     42 
     43  // Step 1.
     44 
     45  nsTArray<RefPtr<CSSNumericValue>> values;
     46 
     47  for (const OwningCSSNumberish& arg : aArgs) {
     48    RefPtr<CSSNumericValue> value;
     49 
     50    if (arg.IsDouble()) {
     51      value = MakeRefPtr<CSSUnitValue>(global, arg.GetAsDouble(), "number"_ns);
     52    } else {
     53      MOZ_ASSERT(arg.IsCSSNumericValue());
     54 
     55      value = arg.GetAsCSSNumericValue();
     56    }
     57 
     58    values.AppendElement(std::move(value));
     59  }
     60 
     61  // Step 2.
     62 
     63  if (values.IsEmpty()) {
     64    aRv.ThrowSyntaxError("Arguments can't be empty");
     65    return nullptr;
     66  }
     67 
     68  // XXX Step 3 is not yet implemented!
     69 
     70  // Step 4.
     71 
     72  auto array = MakeRefPtr<CSSNumericArray>(global, std::move(values));
     73 
     74  return MakeAndAddRef<CSSMathSum>(global, std::move(array));
     75 }
     76 
     77 CSSNumericArray* CSSMathSum::Values() const { return mValues; }
     78 
     79 // end of CSSMathSum Web IDL implementation
     80 
     81 void CSSMathSum::ToCssTextWithProperty(const CSSPropertyId& aPropertyId,
     82                                       nsACString& aDest) const {
     83  aDest.Append("calc("_ns);
     84 
     85  bool written = false;
     86 
     87  for (uint32_t index = 0; index < mValues->Length(); index++) {
     88    bool found;
     89    CSSNumericValue* value = mValues->IndexedGetter(index, found);
     90    MOZ_ASSERT(found);
     91 
     92    if (value->IsCSSUnitValue()) {
     93      CSSUnitValue& unitValue = value->GetAsCSSUnitValue();
     94 
     95      if (written) {
     96        aDest.Append(" + "_ns);
     97      }
     98 
     99      unitValue.ToCssTextWithProperty(aPropertyId, aDest);
    100      written = true;
    101    }
    102  }
    103 
    104  aDest.Append(")"_ns);
    105 }
    106 
    107 CSSMathSum& CSSStyleValue::GetAsCSSMathSum() {
    108  MOZ_DIAGNOSTIC_ASSERT(mValueType == ValueType::MathSum);
    109 
    110  return *static_cast<CSSMathSum*>(this);
    111 }
    112 
    113 }  // namespace mozilla::dom