HTMLTitleElement.cpp [plain text]
#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().setTitleElement(m_title, this);
return InsertionDone;
}
void HTMLTitleElement::removedFrom(ContainerNode& insertionPoint)
{
HTMLElement::removedFrom(insertionPoint);
if (insertionPoint.inDocument() && !insertionPoint.isInShadowTree())
document().removeTitle(this);
}
void HTMLTitleElement::childrenChanged(const ChildChange& change)
{
HTMLElement::childrenChanged(change);
m_title = textWithDirection();
if (inDocument()) {
if (!isInShadowTree())
document().setTitleElement(m_title, this);
else
document().removeTitle(this);
}
}
String HTMLTitleElement::text() const
{
return TextNodeTraversal::contentsAsString(*this);
}
StringWithDirection HTMLTitleElement::textWithDirection()
{
TextDirection direction = LTR;
if (RenderStyle* computedStyle = this->computedStyle())
direction = computedStyle->direction();
else {
Ref<RenderStyle> style(document().ensureStyleResolver().styleForElement(this, 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, IGNORE_EXCEPTION);
return;
}
String valueCopy(value);
if (hasChildNodes())
removeChildren();
if (!valueCopy.isEmpty())
appendChild(document().createTextNode(valueCopy), IGNORE_EXCEPTION);
}
}