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/* 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 */
#ifndef mozilla_CSSVariableDeclarations_h
#define mozilla_CSSVariableDeclarations_h
#include "nsDataHashtable.h"
namespace mozilla {
class CSSVariableResolver;
} // namespace mozilla
struct nsRuleData;
namespace mozilla {
class CSSVariableDeclarations
{
public:
CSSVariableDeclarations();
CSSVariableDeclarations(const CSSVariableDeclarations& aOther);
#ifdef DEBUG
~CSSVariableDeclarations();
#endif
CSSVariableDeclarations& operator=(const CSSVariableDeclarations& aOther);
/**
* Returns whether this set of variable declarations includes a variable
* with a given name.
*
* @param aName The variable name (not including any "--" prefix that would
* be part of the custom property name).
*/
bool Has(const nsAString& aName) const;
/**
* Represents the type of a variable value.
*/
enum Type {
eTokenStream, // a stream of CSS tokens (the usual type for variables)
eInitial, // 'initial'
eInherit, // 'inherit'
eUnset // 'unset'
};
/**
* Gets the value of a variable in this set of variable declarations.
*
* @param aName The variable name (not including any "--" prefix that would
* be part of the custom property name).
* @param aType Out parameter into which the type of the variable value will
* be stored.
* @param aValue Out parameter into which the value of the variable will
* be stored. If the variable is 'initial', 'inherit' or 'unset', this will
* be the empty string.
* @return Whether a variable with the given name was found. When false
* is returned, aType and aValue will not be modified.
*/
bool Get(const nsAString& aName, Type& aType, nsString& aValue) const;
/**
* Adds or modifies an existing entry in this set of variable declarations
* to have the value 'initial'.
*
* @param aName The variable name (not including any "--" prefix that would
* be part of the custom property name) whose value is to be set.
*/
void PutInitial(const nsAString& aName);
/**
* Adds or modifies an existing entry in this set of variable declarations
* to have the value 'inherit'.
*
* @param aName The variable name (not including any "--" prefix that would
* be part of the custom property name) whose value is to be set.
*/
void PutInherit(const nsAString& aName);
/**
* Adds or modifies an existing entry in this set of variable declarations
* to have the value 'unset'.
*
* @param aName The variable name (not including any "--" prefix that would
* be part of the custom property name) whose value is to be set.
*/
void PutUnset(const nsAString& aName);
/**
* Adds or modifies an existing entry in this set of variable declarations
* to have a token stream value.
*
* @param aName The variable name (not including any "--" prefix that would
* be part of the custom property name) whose value is to be set.
* @param aTokenStream The CSS token stream.
*/
void PutTokenStream(const nsAString& aName, const nsString& aTokenStream);
/**
* Removes an entry in this set of variable declarations.
*
* @param aName The variable name (not including any "--" prefix that would
* be part of the custom property name) whose entry is to be removed.
*/
void Remove(const nsAString& aName);
/**
* Returns the number of entries in this set of variable declarations.
*/
uint32_t Count() const { return mVariables.Count(); }
/**
* Copies each variable value from this object into aRuleData, unless that
* variable already exists on aRuleData.
*/
void MapRuleInfoInto(nsRuleData* aRuleData);
/**
* Copies the variables from this object into aResolver, marking them as
* specified values.
*/
void AddVariablesToResolver(CSSVariableResolver* aResolver) const;
size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
private:
/**
* Adds all the variable declarations from aOther into this object.
*/
void CopyVariablesFrom(const CSSVariableDeclarations& aOther);
nsDataHashtable<nsStringHashKey, nsString> mVariables;
};
} // namespace mozilla
#endif
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