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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* 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 "mozilla/dom/CSSUnitValue.h"
#include "mozilla/AlreadyAddRefed.h"
#include "mozilla/CSSPropertyId.h"
#include "mozilla/ErrorResult.h"
#include "mozilla/RefPtr.h"
#include "mozilla/ServoStyleConsts.h"
#include "mozilla/dom/BindingDeclarations.h"
#include "mozilla/dom/CSSUnitValueBinding.h"
namespace mozilla::dom {
CSSUnitValue::CSSUnitValue(nsCOMPtr<nsISupports> aParent, double aValue,
const nsACString& aUnit)
: CSSNumericValue(std::move(aParent), NumericValueType::UnitValue),
mValue(aValue),
mUnit(aUnit) {}
// static
RefPtr<CSSUnitValue> CSSUnitValue::Create(nsCOMPtr<nsISupports> aParent,
const StyleUnitValue& aUnitValue) {
return MakeRefPtr<CSSUnitValue>(aParent, aUnitValue.value, aUnitValue.unit);
}
JSObject* CSSUnitValue::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return CSSUnitValue_Binding::Wrap(aCx, this, aGivenProto);
}
// start of CSSUnitValue Web IDL implementation
// https://drafts.css-houdini.org/css-typed-om-1/#dom-cssunitvalue-cssunitvalue
//
// static
already_AddRefed<CSSUnitValue> CSSUnitValue::Constructor(
const GlobalObject& aGlobal, double aValue, const nsACString& aUnit,
ErrorResult& aRv) {
// XXX Units should be normalized to lowercase. The Typed OM spec doesn’t
// state this explicitly, but WPT requires lowercase normalization and it
// can also be deduced from the CSS Values spec. Besides fixing it here,
// a spec issue may be needed to clarify this.
// Step 1.
// XXX A type should be created from unit and if that fails, the failure
// should be propagated here
// Step 2.
return MakeAndAddRef<CSSUnitValue>(aGlobal.GetAsSupports(), aValue, aUnit);
}
double CSSUnitValue::Value() const { return mValue; }
void CSSUnitValue::SetValue(double aArg) { mValue = aArg; }
void CSSUnitValue::GetUnit(nsCString& aRetVal) const { aRetVal = mUnit; }
// end of CSSUnitValue Web IDL implementation
void CSSUnitValue::ToCssTextWithProperty(const CSSPropertyId& aPropertyId,
nsACString& aDest) const {
// XXX See:
// https://drafts.css-houdini.org/css-typed-om-1/#create-an-internal-representation
//
// The current |isValueOutOfRange| check implements only a minimal subset of
// the algorithm step that wraps out-of-range numeric values (e.g. negative
// perspective) in a calc() expression to keep them representable.
//
// This is a temporary solution until a more robust mechanism is added for
// handling range checks and value wrapping. The long-term plan is to move
// this logic to a dedicated FromTyped trait or similar infrastructure that
// can validate and construct internal representations in a property-aware
// and fully spec-compliant manner. See bug 2005142
const bool isValueOutOfRange = [](NonCustomCSSPropertyId aId, double aValue) {
switch (aId) {
case eCSSProperty_font_stretch:
case eCSSProperty_column_width:
case eCSSProperty_flex_basis:
case eCSSProperty_font_size:
case eCSSProperty_perspective:
case eCSSProperty_max_block_size:
case eCSSProperty_max_height:
case eCSSProperty_max_inline_size:
case eCSSProperty_max_width:
case eCSSProperty_block_size:
case eCSSProperty_height:
case eCSSProperty_inline_size:
case eCSSProperty_min_block_size:
case eCSSProperty_min_height:
case eCSSProperty_min_inline_size:
case eCSSProperty_min_width:
case eCSSProperty_width:
case eCSSProperty_border_block_end_width:
case eCSSProperty_border_block_start_width:
case eCSSProperty_border_bottom_width:
case eCSSProperty_border_inline_end_width:
case eCSSProperty_border_inline_start_width:
case eCSSProperty_border_left_width:
case eCSSProperty_border_right_width:
case eCSSProperty_border_top_width:
case eCSSProperty_outline_width:
case eCSSProperty_padding_block_end:
case eCSSProperty_padding_block_start:
case eCSSProperty_padding_bottom:
case eCSSProperty_padding_inline_end:
case eCSSProperty_padding_inline_start:
case eCSSProperty_padding_left:
case eCSSProperty_padding_right:
case eCSSProperty_padding_top:
case eCSSProperty_r:
case eCSSProperty_shape_margin:
case eCSSProperty_rx:
case eCSSProperty_ry:
case eCSSProperty_scroll_padding_block_end:
case eCSSProperty_scroll_padding_block_start:
case eCSSProperty_scroll_padding_bottom:
case eCSSProperty_scroll_padding_inline_end:
case eCSSProperty_scroll_padding_inline_start:
case eCSSProperty_scroll_padding_left:
case eCSSProperty_scroll_padding_right:
case eCSSProperty_scroll_padding_top:
return aValue < 0;
default:
return false;
}
}(aPropertyId.mId, mValue);
if (isValueOutOfRange) {
aDest.Append("calc("_ns);
}
aDest.AppendFloat(mValue);
if (mUnit.Equals("percent"_ns)) {
aDest.Append("%"_ns);
} else if (!mUnit.Equals("number"_ns)) {
aDest.Append(mUnit);
}
if (isValueOutOfRange) {
aDest.Append(")"_ns);
}
}
StyleUnitValue CSSUnitValue::ToStyleUnitValue() const {
return StyleUnitValue(mValue, StyleCssString(mUnit));
}
const CSSUnitValue& CSSNumericValue::GetAsCSSUnitValue() const {
MOZ_DIAGNOSTIC_ASSERT(mNumericValueType == NumericValueType::UnitValue);
return *static_cast<const CSSUnitValue*>(this);
}
CSSUnitValue& CSSNumericValue::GetAsCSSUnitValue() {
MOZ_DIAGNOSTIC_ASSERT(mNumericValueType == NumericValueType::UnitValue);
return *static_cast<CSSUnitValue*>(this);
}
} // namespace mozilla::dom
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