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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* (C) 2001 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2003, 2010 Apple Inc. All rights reserved.
*
* 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 "HTMLTitleElement.h"
#include "Document.h"
#include "HTMLNames.h"
#include "NodeRenderStyle.h"
#include "RenderStyle.h"
#include "StyleInheritedData.h"
#include "StyleResolver.h"
#include "Text.h"
#include "TextNodeTraversal.h"
#include <wtf/Ref.h>
#include <wtf/text/StringBuilder.h>
namespace WebCore {
using namespace HTMLNames;
inline HTMLTitleElement::HTMLTitleElement(const QualifiedName& tagName, Document& document)
: HTMLElement(tagName, document)
{
ASSERT(hasTagName(titleTag));
}
Ref<HTMLTitleElement> HTMLTitleElement::create(const QualifiedName& tagName, Document& document)
{
return adoptRef(*new HTMLTitleElement(tagName, document));
}
Node::InsertionNotificationRequest HTMLTitleElement::insertedInto(ContainerNode& insertionPoint)
{
HTMLElement::insertedInto(insertionPoint);
if (inDocument() && !isInShadowTree())
document().titleElementAdded(*this);
return InsertionDone;
}
void HTMLTitleElement::removedFrom(ContainerNode& insertionPoint)
{
HTMLElement::removedFrom(insertionPoint);
if (insertionPoint.inDocument() && !insertionPoint.isInShadowTree())
document().titleElementRemoved(*this);
}
void HTMLTitleElement::childrenChanged(const ChildChange& change)
{
HTMLElement::childrenChanged(change);
m_title = computedTextWithDirection();
document().titleElementTextChanged(*this);
}
String HTMLTitleElement::text() const
{
return TextNodeTraversal::contentsAsString(*this);
}
StringWithDirection HTMLTitleElement::computedTextWithDirection()
{
TextDirection direction = LTR;
if (RenderStyle* computedStyle = this->computedStyle())
direction = computedStyle->direction();
else {
auto style = resolveStyle(parentElement() ? parentElement()->renderStyle() : nullptr);
direction = style.get().direction();
}
return StringWithDirection(text(), direction);
}
void HTMLTitleElement::setText(const String& value)
{
Ref<HTMLTitleElement> protectFromMutationEvents(*this);
if (!value.isEmpty() && hasOneChild() && is<Text>(*firstChild())) {
downcast<Text>(*firstChild()).setData(value);
return;
}
// We make a copy here because entity of "value" argument can be Document::m_title,
// which goes empty during removeChildren() invocation below,
// which causes HTMLTitleElement::childrenChanged(), which ends up Document::setTitle().
String valueCopy(value);
if (hasChildNodes())
removeChildren();
if (!valueCopy.isEmpty())
appendChild(document().createTextNode(valueCopy), IGNORE_EXCEPTION);
}
}
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