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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */
/* CSS Custom Property assignments for a Declaration at a given priority */
#include "CSSVariableDeclarations.h"
#include "CSSVariableResolver.h"
#include "nsCSSScanner.h"
#include "nsRuleData.h"
// These three special string values are used to represent specified values of
// 'initial', 'inherit' and 'unset'. (Note that none of these are valid
// variable values.)
#define INITIAL_VALUE "!"
#define INHERIT_VALUE ";"
#define UNSET_VALUE ")"
namespace mozilla {
CSSVariableDeclarations::CSSVariableDeclarations()
{
MOZ_COUNT_CTOR(CSSVariableDeclarations);
}
CSSVariableDeclarations::CSSVariableDeclarations(const CSSVariableDeclarations& aOther)
{
MOZ_COUNT_CTOR(CSSVariableDeclarations);
CopyVariablesFrom(aOther);
}
#ifdef DEBUG
CSSVariableDeclarations::~CSSVariableDeclarations()
{
MOZ_COUNT_DTOR(CSSVariableDeclarations);
}
#endif
CSSVariableDeclarations&
CSSVariableDeclarations::operator=(const CSSVariableDeclarations& aOther)
{
if (this == &aOther) {
return *this;
}
mVariables.Clear();
CopyVariablesFrom(aOther);
return *this;
}
void
CSSVariableDeclarations::CopyVariablesFrom(const CSSVariableDeclarations& aOther)
{
for (auto iter = aOther.mVariables.ConstIter(); !iter.Done(); iter.Next()) {
mVariables.Put(iter.Key(), iter.UserData());
}
}
bool
CSSVariableDeclarations::Has(const nsAString& aName) const
{
nsString value;
return mVariables.Get(aName, &value);
}
bool
CSSVariableDeclarations::Get(const nsAString& aName,
Type& aType,
nsString& aTokenStream) const
{
nsString value;
if (!mVariables.Get(aName, &value)) {
return false;
}
if (value.EqualsLiteral(INITIAL_VALUE)) {
aType = eInitial;
aTokenStream.Truncate();
} else if (value.EqualsLiteral(INHERIT_VALUE)) {
aType = eInitial;
aTokenStream.Truncate();
} else if (value.EqualsLiteral(UNSET_VALUE)) {
aType = eUnset;
aTokenStream.Truncate();
} else {
aType = eTokenStream;
aTokenStream = value;
}
return true;
}
void
CSSVariableDeclarations::PutTokenStream(const nsAString& aName,
const nsString& aTokenStream)
{
MOZ_ASSERT(!aTokenStream.EqualsLiteral(INITIAL_VALUE) &&
!aTokenStream.EqualsLiteral(INHERIT_VALUE) &&
!aTokenStream.EqualsLiteral(UNSET_VALUE));
mVariables.Put(aName, aTokenStream);
}
void
CSSVariableDeclarations::PutInitial(const nsAString& aName)
{
mVariables.Put(aName, NS_LITERAL_STRING(INITIAL_VALUE));
}
void
CSSVariableDeclarations::PutInherit(const nsAString& aName)
{
mVariables.Put(aName, NS_LITERAL_STRING(INHERIT_VALUE));
}
void
CSSVariableDeclarations::PutUnset(const nsAString& aName)
{
mVariables.Put(aName, NS_LITERAL_STRING(UNSET_VALUE));
}
void
CSSVariableDeclarations::Remove(const nsAString& aName)
{
mVariables.Remove(aName);
}
void
CSSVariableDeclarations::MapRuleInfoInto(nsRuleData* aRuleData)
{
if (!(aRuleData->mSIDs & NS_STYLE_INHERIT_BIT(Variables))) {
return;
}
if (!aRuleData->mVariables) {
aRuleData->mVariables = new CSSVariableDeclarations(*this);
} else {
for (auto iter = mVariables.Iter(); !iter.Done(); iter.Next()) {
nsDataHashtable<nsStringHashKey, nsString>& variables =
aRuleData->mVariables->mVariables;
const nsAString& aName = iter.Key();
if (!variables.Contains(aName)) {
variables.Put(aName, iter.UserData());
}
}
}
}
void
CSSVariableDeclarations::AddVariablesToResolver(
CSSVariableResolver* aResolver) const
{
for (auto iter = mVariables.ConstIter(); !iter.Done(); iter.Next()) {
const nsAString& name = iter.Key();
nsString value = iter.UserData();
if (value.EqualsLiteral(INITIAL_VALUE)) {
// Values of 'initial' are treated the same as an invalid value in the
// variable resolver.
aResolver->Put(name, EmptyString(),
eCSSTokenSerialization_Nothing,
eCSSTokenSerialization_Nothing,
false);
} else if (value.EqualsLiteral(INHERIT_VALUE) ||
value.EqualsLiteral(UNSET_VALUE)) {
// Values of 'inherit' and 'unset' don't need any handling, since it means
// we just need to keep whatever value is currently in the resolver. This
// is because the specified variable declarations already have only the
// winning declaration for the variable and no longer have any of the
// others.
} else {
// At this point, we don't know what token types are at the start and end
// of the specified variable value. These will be determined later during
// the resolving process.
aResolver->Put(name, value,
eCSSTokenSerialization_Nothing,
eCSSTokenSerialization_Nothing,
false);
}
}
}
size_t
CSSVariableDeclarations::SizeOfIncludingThis(
mozilla::MallocSizeOf aMallocSizeOf) const
{
size_t n = aMallocSizeOf(this);
n += mVariables.ShallowSizeOfExcludingThis(aMallocSizeOf);
for (auto iter = mVariables.ConstIter(); !iter.Done(); iter.Next()) {
n += iter.Key().SizeOfExcludingThisIfUnshared(aMallocSizeOf);
n += iter.Data().SizeOfExcludingThisIfUnshared(aMallocSizeOf);
}
return n;
}
} // namespace mozilla
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