htmlbrelement.cpp

linux下开源浏览器WebKit的源码,市面上的很多商用浏览器都是移植自WebKit

/**
 * Copyright (C) 1999 Lars Knoll ([e-mail])
 *           (C) 1999 Antti Koivisto ([e-mail])
 *           (C) 2000 Simon Hausmann <[e-mail]>
 * Copyright (C) 2003, 2006 Apple Computer, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */
#include "config.h"
#include "HTMLBRElement.h"

#include "CSSPropertyNames.h"
#include "HTMLNames.h"
#include "RenderBR.h"

namespace WebCore {

using namespace HTMLNames;

HTMLBRElement::HTMLBRElement(const QualifiedName& tagName, Document *doc)
    : HTMLElement(tagName, doc)
{
    ASSERT(hasTagName(brTag));
}

HTMLBRElement::~HTMLBRElement()
{
}

bool HTMLBRElement::mapToEntry(const QualifiedName& attrName, MappedAttributeEntry& result) const
{
    if (attrName == clearAttr) {
        result = eUniversal;
        return false;
    }
    
    return HTMLElement::mapToEntry(attrName, result);
}

void HTMLBRElement::parseMappedAttribute(MappedAttribute *attr)
{
    if (attr->name() == clearAttr) {
        // If the string is empty, then don't add the clear property. 
        // <br clear> and <br clear=""> are just treated like <br> by Gecko, Mac IE, etc. -dwh
        const AtomicString& str = attr->value();
        if (!str.isEmpty()) {
            if (equalIgnoringCase(str, "all"))
                addCSSProperty(attr, CSSPropertyClear, "both");
            else
                addCSSProperty(attr, CSSPropertyClear, str);
        }
    } else
        HTMLElement::parseMappedAttribute(attr);
}

RenderObject* HTMLBRElement::createRenderer(RenderArena* arena, RenderStyle* style)
{
     if (style->contentData())
        return RenderObject::createObject(this, style);

     return new (arena) RenderBR(this);
}

String HTMLBRElement::clear() const
{
    return getAttribute(clearAttr);
}

void HTMLBRElement::setClear(const String &value)
{
    setAttribute(clearAttr, value);
}

}