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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/. */
#ifndef mozilla_CSSPropertyId_h
#define mozilla_CSSPropertyId_h
#include "NonCustomCSSPropertyId.h"
#include "mozilla/Assertions.h"
#include "mozilla/HashFunctions.h"
#include "mozilla/RefPtr.h"
#include "mozilla/ServoBindings.h"
#include "nsAtom.h"
#include "nsCSSProps.h"
#include "nsString.h"
namespace mozilla {
struct CSSPropertyId {
explicit CSSPropertyId(NonCustomCSSPropertyId aProperty) : mId(aProperty) {
MOZ_ASSERT(aProperty != eCSSPropertyExtra_variable,
"Cannot create an CSSPropertyId from only a "
"eCSSPropertyExtra_variable.");
}
private:
explicit CSSPropertyId(RefPtr<nsAtom> aCustomName)
: mId(eCSSPropertyExtra_variable), mCustomName(std::move(aCustomName)) {
MOZ_ASSERT(mCustomName, "Null custom property name");
}
public:
// Callers are expected to pass a custom name atom with the leading "--"
// already stripped. The remaining ident may legally start with "-"
// (or even "--"), so we cannot assert anything about its prefix here.
static CSSPropertyId FromCustomName(RefPtr<nsAtom> aCustomName) {
return CSSPropertyId(aCustomName);
}
static CSSPropertyId FromCustomProperty(const nsACString& aCustomProperty) {
MOZ_ASSERT(StringBeginsWith(aCustomProperty, "--"_ns));
// TODO(zrhoffman, bug 1811897) Add test coverage for removing the `--`
// prefix here.
RefPtr<nsAtom> atom =
NS_Atomize(Substring(aCustomProperty, 2, aCustomProperty.Length() - 2));
return FromCustomName(atom);
}
static CSSPropertyId FromIdOrCustomProperty(
NonCustomCSSPropertyId aId, const nsACString& aCustomProperty) {
if (aId != eCSSPropertyExtra_variable) {
return CSSPropertyId(aId);
}
return FromCustomProperty(aCustomProperty);
}
NonCustomCSSPropertyId mId = eCSSProperty_UNKNOWN;
RefPtr<nsAtom> mCustomName;
bool IsCustom() const { return mId == eCSSPropertyExtra_variable; }
bool operator==(const CSSPropertyId&) const = default;
bool operator!=(const CSSPropertyId&) const = default;
bool IsValid() const {
if (mId == eCSSProperty_UNKNOWN) {
return false;
}
return IsCustom() == !!mCustomName;
}
void ToString(nsACString& aString) const {
if (IsCustom()) {
MOZ_ASSERT(mCustomName, "Custom property should have a name");
// mCustomName does not include the "--" prefix
aString.AssignLiteral("--");
AppendUTF16toUTF8(nsDependentAtomString(mCustomName), aString);
} else {
aString.Assign(nsCSSProps::GetStringValue(mId));
}
}
void ToString(nsAString& aString) const {
if (IsCustom()) {
MOZ_ASSERT(mCustomName, "Custom property should have a name");
// mCustomName does not include the "--" prefix
aString.AssignLiteral("--");
aString.Append(nsDependentAtomString(mCustomName));
} else {
aString.Assign(NS_ConvertUTF8toUTF16(nsCSSProps::GetStringValue(mId)));
}
}
HashNumber Hash() const {
HashNumber hash = mCustomName ? mCustomName->hash() : 0;
return AddToHash(hash, mId);
}
CSSPropertyId ToPhysical(const ComputedStyle& aStyle) const {
if (IsCustom()) {
return *this;
}
return CSSPropertyId{nsCSSProps::Physicalize(mId, aStyle)};
}
};
// MOZ_DBG support for AnimatedPropertyId
inline std::ostream& operator<<(std::ostream& aOut,
const CSSPropertyId& aProperty) {
if (aProperty.IsCustom()) {
return aOut << nsAtomCString(aProperty.mCustomName);
}
return aOut << nsCSSProps::GetStringValue(aProperty.mId);
}
} // namespace mozilla
#endif // mozilla_CSSPropertyId_h
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