Source/core/css/CSSVariablesMap.cpp

/*
 * Copyright (C) 2013 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 * 2.  Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
 *     its contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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 */

#include "config.h"
#include "core/css/CSSVariablesMap.h"

#include "bindings/v8/ExceptionState.h"
#include "core/css/CSSStyleDeclaration.h"

namespace WebCore {

unsigned CSSVariablesMap::size() const
{
    if (m_styleDeclaration)
        return m_styleDeclaration->variableCount();
    return 0;
}

String CSSVariablesMap::get(const AtomicString& name) const
{
    if (m_styleDeclaration)
        return m_styleDeclaration->variableValue(name);
    return String();
}

bool CSSVariablesMap::has(const AtomicString& name) const
{
    if (m_styleDeclaration)
        return !get(name).isEmpty();
    return false;
}

void CSSVariablesMap::set(const AtomicString& name, const String& value, ExceptionState& es)
{
    if (!m_styleDeclaration)
        return;
    if (m_styleDeclaration->setVariableValue(name, value, es)) {
        Iterators::iterator end = m_activeIterators.end();
        for (Iterators::iterator it = m_activeIterators.begin(); it != end; ++it)
            (*it)->addedVariable(name);
    }
}

bool CSSVariablesMap::remove(const AtomicString& name)
{
    if (!m_styleDeclaration)
        return false;
    if (m_styleDeclaration->removeVariable(name)) {
        Iterators::iterator end = m_activeIterators.end();
        for (Iterators::iterator it = m_activeIterators.begin(); it != end; ++it)
            (*it)->removedVariable(name);
        return true;
    }
    return false;
}

void CSSVariablesMap::clear(ExceptionState& es)
{
    if (!m_styleDeclaration)
        return;
    if (m_styleDeclaration->clearVariables(es)) {
        Iterators::iterator end = m_activeIterators.end();
        for (Iterators::iterator it = m_activeIterators.begin(); it != end; ++it)
            (*it)->clearedVariables();
    }
}

void CSSVariablesMap::forEach(PassRefPtr<CSSVariablesMapForEachCallback> callback, ScriptValue& thisArg) const
{
    forEach(callback, &thisArg);
}

void CSSVariablesMap::forEach(PassRefPtr<CSSVariablesMapForEachCallback> callback) const
{
    forEach(callback, 0);
}

void CSSVariablesMap::forEach(PassRefPtr<CSSVariablesMapForEachCallback> callback, ScriptValue* thisArg) const
{
    if (!m_styleDeclaration)
        return;
    RefPtr<CSSVariablesIterator> iterator = m_styleDeclaration->variablesIterator();
    m_activeIterators.append(iterator.get());
    while (!iterator->atEnd()) {
        String name = iterator->name();
        String value = iterator->value();
        if (thisArg)
            callback->handleItem(*thisArg, value, name, const_cast<CSSVariablesMap*>(this));
        else
            callback->handleItem(value, name, const_cast<CSSVariablesMap*>(this));
        iterator->advance();
    }
    ASSERT(m_activeIterators.last() == iterator.get());
    m_activeIterators.removeLast();
}

} // namespace WebCore