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116 lines
3.8 KiB
C
116 lines
3.8 KiB
C
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/* vim: set shiftwidth=2 tabstop=8 autoindent cindent expandtab: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* CSS Custom Property assignments for a Declaration at a given priority */
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#ifndef mozilla_CSSVariableDeclarations_h
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#define mozilla_CSSVariableDeclarations_h
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#include "nsDataHashtable.h"
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namespace mozilla {
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class CSSVariableDeclarations
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{
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public:
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CSSVariableDeclarations();
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CSSVariableDeclarations(const CSSVariableDeclarations& aOther);
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#ifdef DEBUG
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~CSSVariableDeclarations();
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#endif
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CSSVariableDeclarations& operator=(const CSSVariableDeclarations& aOther);
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/**
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* Returns whether this set of variable declarations includes a variable
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* with a given name.
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*
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* @param aName The variable name (not including any "var-" prefix that would
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* be part of the custom property name).
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*/
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bool Has(const nsAString& aName) const;
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/**
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* Represents the type of a variable value.
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*/
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enum Type {
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eTokenStream, // a stream of CSS tokens (the usual type for variables)
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eInitial, // 'initial'
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eInherit // 'inherit'
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};
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/**
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* Gets the value of a variable in this set of variable declarations.
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*
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* @param aName The variable name (not including any "var-" prefix that would
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* be part of the custom property name).
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* @param aType Out parameter into which the type of the variable value will
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* be stored.
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* @param aValue Out parameter into which the value of the variable will
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* be stored. If the variable is 'initial' or 'inherit', this will be
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* the empty string.
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* @return Whether a variable with the given name was found. When false
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* is returned, aType and aValue will not be modified.
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*/
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bool Get(const nsAString& aName, Type& aType, nsString& aValue) const;
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/**
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* Adds or modifies an existing entry in this set of variable declarations
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* to have the value 'initial'.
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*
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* @param aName The variable name (not including any "var-" prefix that would
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* be part of the custom property name) whose value is to be set.
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*/
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void PutInitial(const nsAString& aName);
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/**
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* Adds or modifies an existing entry in this set of variable declarations
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* to have the value 'inherit'.
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*
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* @param aName The variable name (not including any "var-" prefix that would
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* be part of the custom property name) whose value is to be set.
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*/
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void PutInherit(const nsAString& aName);
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/**
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* Adds or modifies an existing entry in this set of variable declarations
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* to have a token stream value.
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*
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* @param aName The variable name (not including any "var-" prefix that would
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* be part of the custom property name) whose value is to be set.
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* @param aTokenStream The CSS token stream.
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*/
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void PutTokenStream(const nsAString& aName, const nsString& aTokenStream);
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/**
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* Removes an entry in this set of variable declarations.
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*
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* @param aName The variable name (not including any "var-" prefix that would
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* be part of the custom property name) whose entry is to be removed.
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*/
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void Remove(const nsAString& aName);
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/**
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* Returns the number of entries in this set of variable declarations.
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*/
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uint32_t Count() const { return mVariables.Count(); }
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size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
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private:
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/**
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* Adds all the variable declarations from aOther into this object.
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*/
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void CopyVariablesFrom(const CSSVariableDeclarations& aOther);
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static PLDHashOperator EnumerateVariableForCopy(const nsAString& aName,
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nsString aValue,
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void* aData);
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nsDataHashtable<nsStringHashKey, nsString> mVariables;
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};
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} // namespace mozilla
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#endif
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