#include "config.h"
#include "Element.h"
#include "cssstyleselector.h"
#include "Document.h"
#include "ExceptionCode.h"
#include "Frame.h"
#include "HTMLNames.h"
#include "NamedAttrMap.h"
#include "RenderBlock.h"
#include "SelectionController.h"
#include "TextStream.h"
#include "WKContentObservation.h"
namespace WebCore {
using namespace HTMLNames;
Element::Element(const QualifiedName& qName, Document *doc)
: ContainerNode(doc)
, m_updateFocusAppearanceTimer(this, &Element::updateFocusAppearanceTimerFired)
, m_needsFocusAppearanceUpdate(false)
, m_tagName(qName)
{
}
Element::~Element()
{
if (namedAttrMap)
namedAttrMap->detachFromElement();
}
PassRefPtr<Node> Element::cloneNode(bool deep)
{
ExceptionCode ec = 0;
RefPtr<Element> clone = document()->createElementNS(namespaceURI(), nodeName(), ec);
assert(!ec);
if (namedAttrMap)
*clone->attributes() = *namedAttrMap;
clone->copyNonAttributeProperties(this);
if (deep)
cloneChildNodes(clone.get());
return clone.release();
}
void Element::removeAttribute(const QualifiedName& name, ExceptionCode& ec)
{
if (namedAttrMap) {
namedAttrMap->removeNamedItem(name, ec);
if (ec == NOT_FOUND_ERR)
ec = 0;
}
}
void Element::setAttribute(const QualifiedName& name, const String &value)
{
ExceptionCode ec = 0;
setAttribute(name, value.impl(), ec);
}
NamedAttrMap *Element::attributes() const
{
return attributes(false);
}
NamedAttrMap* Element::attributes(bool readonly) const
{
updateStyleAttributeIfNeeded();
if (!readonly && !namedAttrMap)
createAttributeMap();
return namedAttrMap.get();
}
Node::NodeType Element::nodeType() const
{
return ELEMENT_NODE;
}
const AtomicStringList* Element::getClassList() const
{
return 0;
}
const AtomicString& Element::getIDAttribute() const
{
return namedAttrMap ? namedAttrMap->id() : nullAtom;
}
bool Element::hasAttribute(const QualifiedName& name) const
{
return hasAttributeNS(name.namespaceURI(), name.localName());
}
const AtomicString& Element::getAttribute(const QualifiedName& name) const
{
if (name == styleAttr)
updateStyleAttributeIfNeeded();
if (namedAttrMap)
if (Attribute* a = namedAttrMap->getAttributeItem(name))
return a->value();
return nullAtom;
}
void Element::scrollIntoView(bool alignToTop)
{
document()->updateLayoutIgnorePendingStylesheets();
IntRect bounds = getRect();
if (renderer()) {
if (alignToTop)
renderer()->enclosingLayer()->scrollRectToVisible(bounds, RenderLayer::gAlignToEdgeIfNeeded, RenderLayer::gAlignTopAlways);
else
renderer()->enclosingLayer()->scrollRectToVisible(bounds, RenderLayer::gAlignToEdgeIfNeeded, RenderLayer::gAlignBottomAlways);
}
}
void Element::scrollIntoViewIfNeeded(bool centerIfNeeded)
{
document()->updateLayoutIgnorePendingStylesheets();
IntRect bounds = getRect();
if (renderer()) {
if (centerIfNeeded)
renderer()->enclosingLayer()->scrollRectToVisible(bounds, RenderLayer::gAlignCenterIfNeeded, RenderLayer::gAlignCenterIfNeeded);
else
renderer()->enclosingLayer()->scrollRectToVisible(bounds, RenderLayer::gAlignToEdgeIfNeeded, RenderLayer::gAlignToEdgeIfNeeded);
}
}
void Element::scrollByUnits(int units, ScrollGranularity granularity)
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderObject *rend = renderer()) {
if (rend->hasOverflowClip()) {
ScrollDirection direction = ScrollDown;
if (units < 0) {
direction = ScrollUp;
units = -units;
}
rend->layer()->scroll(direction, granularity, units);
}
}
}
void Element::scrollByLines(int lines)
{
scrollByUnits(lines, ScrollByLine);
}
void Element::scrollByPages(int pages)
{
scrollByUnits(pages, ScrollByPage);
}
int Element::offsetLeft()
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderObject* rend = renderer())
return rend->offsetLeft();
return 0;
}
int Element::offsetTop()
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderObject* rend = renderer())
return rend->offsetTop();
return 0;
}
int Element::offsetWidth()
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderObject* rend = renderer())
return rend->offsetWidth();
return 0;
}
int Element::offsetHeight()
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderObject* rend = renderer())
return rend->offsetHeight();
return 0;
}
Element* Element::offsetParent()
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderObject* rend = renderer())
if (RenderObject* offsetParent = rend->offsetParent())
return static_cast<Element*>(offsetParent->element());
return 0;
}
int Element::clientWidth()
{
document()->updateLayoutIgnorePendingStylesheets();
if (!document()->inCompatMode() && document()->documentElement() == this)
return document()->frame()->view()->visibleWidth();
if (RenderObject* rend = renderer())
return rend->clientWidth();
return 0;
}
int Element::clientHeight()
{
document()->updateLayoutIgnorePendingStylesheets();
if (!document()->inCompatMode() && document()->documentElement() == this)
return document()->frame()->view()->visibleHeight();
if (RenderObject* rend = renderer())
return rend->clientHeight();
return 0;
}
int Element::scrollLeft()
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderObject* rend = renderer())
return rend->scrollLeft();
return 0;
}
int Element::scrollTop()
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderObject* rend = renderer())
return rend->scrollTop();
return 0;
}
void Element::setScrollLeft(int newLeft)
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderObject *rend = renderer())
rend->setScrollLeft(newLeft);
}
void Element::setScrollTop(int newTop)
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderObject *rend = renderer())
rend->setScrollTop(newTop);
}
int Element::scrollWidth()
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderObject* rend = renderer())
return rend->scrollWidth();
return 0;
}
int Element::scrollHeight()
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderObject* rend = renderer())
return rend->scrollHeight();
return 0;
}
static inline bool inHTMLDocument(const Element* e)
{
return e && e->document()->isHTMLDocument();
}
const AtomicString& Element::getAttribute(const String& name) const
{
String localName = inHTMLDocument(this) ? name.lower() : name;
if (localName == styleAttr.localName())
updateStyleAttributeIfNeeded();
if (namedAttrMap)
if (Attribute* a = namedAttrMap->getAttributeItem(localName))
return a->value();
return nullAtom;
}
const AtomicString& Element::getAttributeNS(const String& namespaceURI, const String& localName) const
{
return getAttribute(QualifiedName(nullAtom, localName.impl(), namespaceURI.impl()));
}
void Element::setAttribute(const String& name, const String& value, ExceptionCode& ec)
{
if (!Document::isValidName(name)) {
ec = INVALID_CHARACTER_ERR;
return;
}
Attribute* old = attributes(false)->getAttributeItem(name);
if (namedAttrMap->isReadOnlyNode()) {
ec = NO_MODIFICATION_ALLOWED_ERR;
return;
}
if (inDocument())
document()->incDOMTreeVersion();
String localName = inHTMLDocument(this) ? name.lower() : name;
if (localName == idAttr.localName())
updateId(old ? old->value() : nullAtom, value);
if (old && value.isNull())
namedAttrMap->removeAttribute(old->name());
else if (!old && !value.isNull())
namedAttrMap->addAttribute(createAttribute(QualifiedName(nullAtom, localName.impl(), nullAtom), value.impl()));
else if (old && !value.isNull()) {
old->setValue(value);
attributeChanged(old);
}
}
void Element::setAttribute(const QualifiedName& name, StringImpl* value, ExceptionCode& ec)
{
if (inDocument())
document()->incDOMTreeVersion();
Attribute* old = attributes(false)->getAttributeItem(name);
if (namedAttrMap->isReadOnlyNode()) {
ec = NO_MODIFICATION_ALLOWED_ERR;
return;
}
if (name == idAttr)
updateId(old ? old->value() : nullAtom, value);
if (old && !value)
namedAttrMap->removeAttribute(name);
else if (!old && value)
namedAttrMap->addAttribute(createAttribute(name, value));
else if (old && value) {
old->setValue(value);
attributeChanged(old);
}
}
Attribute* Element::createAttribute(const QualifiedName& name, StringImpl* value)
{
return new Attribute(name, value);
}
void Element::setAttributeMap(NamedAttrMap* list)
{
if (inDocument())
document()->incDOMTreeVersion();
Attribute *oldId = namedAttrMap ? namedAttrMap->getAttributeItem(idAttr) : 0;
Attribute *newId = list ? list->getAttributeItem(idAttr) : 0;
if (oldId || newId)
updateId(oldId ? oldId->value() : nullAtom, newId ? newId->value() : nullAtom);
if (namedAttrMap)
namedAttrMap->element = 0;
namedAttrMap = list;
if (namedAttrMap) {
namedAttrMap->element = this;
unsigned len = namedAttrMap->length();
for (unsigned i = 0; i < len; i++)
attributeChanged(namedAttrMap->attrs[i]);
}
}
bool Element::hasAttributes() const
{
updateStyleAttributeIfNeeded();
return namedAttrMap && namedAttrMap->length() > 0;
}
String Element::nodeName() const
{
return m_tagName.toString();
}
String Element::nodeNamePreservingCase() const
{
return m_tagName.toString();
}
void Element::setPrefix(const AtomicString &_prefix, ExceptionCode& ec)
{
checkSetPrefix(_prefix, ec);
if (ec)
return;
m_tagName.setPrefix(_prefix);
}
Node* Element::insertAdjacentElement(const String& where, Node* newChild, int& exception)
{
if (!newChild) {
exception = TYPE_MISMATCH_ERR;
return 0;
}
if (equalIgnoringCase(where, "beforeBegin")) {
if (Node* p = parent())
return p->insertBefore(newChild, this, exception) ? newChild : 0;
} else if (equalIgnoringCase(where, "afterBegin")) {
return insertBefore(newChild, firstChild(), exception) ? newChild : 0;
} else if (equalIgnoringCase(where, "beforeEnd")) {
return appendChild(newChild, exception) ? newChild : 0;
} else if (equalIgnoringCase(where, "afterEnd")) {
if (Node* p = parent())
return p->insertBefore(newChild, nextSibling(), exception) ? newChild : 0;
} else {
exception = NOT_SUPPORTED_ERR;
}
return 0;
}
bool Element::contains(const Element* element) const
{
if (!element)
return false;
return this == element || element->isAncestor(this);
}
void Element::createAttributeMap() const
{
namedAttrMap = new NamedAttrMap(const_cast<Element*>(this));
}
bool Element::isURLAttribute(Attribute *attr) const
{
return false;
}
RenderStyle *Element::styleForRenderer(RenderObject *parentRenderer)
{
return document()->styleSelector()->styleForElement(this);
}
RenderObject *Element::createRenderer(RenderArena *arena, RenderStyle *style)
{
if (document()->documentElement() == this && style->display() == NONE) {
RenderBlock* result = new (arena) RenderBlock(this);
if (result) result->setStyle(style);
return result;
}
return RenderObject::createObject(this, style);
}
void Element::insertedIntoDocument()
{
ContainerNode::insertedIntoDocument();
if (hasID()) {
NamedAttrMap* attrs = attributes(true);
if (attrs) {
Attribute* idItem = attrs->getAttributeItem(idAttr);
if (idItem && !idItem->isNull())
updateId(nullAtom, idItem->value());
}
}
}
void Element::removedFromDocument()
{
if (hasID()) {
NamedAttrMap* attrs = attributes(true);
if (attrs) {
Attribute* idItem = attrs->getAttributeItem(idAttr);
if (idItem && !idItem->isNull())
updateId(idItem->value(), nullAtom);
}
}
ContainerNode::removedFromDocument();
}
void Element::attach()
{
#if SPEED_DEBUG < 1
createRendererIfNeeded();
#endif
ContainerNode::attach();
if (needsFocusAppearanceUpdate() && !m_updateFocusAppearanceTimer.isActive() && document()->focusNode() == this)
m_updateFocusAppearanceTimer.startOneShot(0);
}
void Element::detach()
{
stopUpdateFocusAppearanceTimer();
ContainerNode::detach();
}
EVisibility Element::implicitVisibility()
{
RenderStyle * style;
if (!renderer() || !(style = renderer()->style()))
return VISIBLE;
Length width(style->width()),
height(style->height());
if (width.isFixed() && width.value() <= 0 || height.isFixed() && height.value() <= 0)
return HIDDEN;
Length top(style->top()),
left(style->left());
if (left.isFixed() && width.isFixed() && -left.value() >= width.value())
return HIDDEN;
if (top.isFixed() && height.isFixed() && -top.value() >= height.value())
return HIDDEN;
return VISIBLE;
}
void Element::recalcStyle(StyleChange change)
{
RenderStyle* _style = renderStyle();
bool hasParentStyle = parentNode() ? parentNode()->renderStyle() : false;
EDisplay previousDisplay = _style ? _style->display() : NONE;
EVisibility previousVisibility = _style ? _style->visibility() : HIDDEN;
EVisibility previousImplicitVisibility = WKObservingContentChanges() && WKContentChange() != WKContentVisibilityChange ? implicitVisibility() : VISIBLE;
if (hasParentStyle && (change >= Inherit || changed())) {
RenderStyle *newStyle = document()->styleSelector()->styleForElement(this);
StyleChange ch = diff(_style, newStyle);
if (ch == Detach) {
if (attached())
detach();
attach();
setChanged(false);
setHasChangedChild(false);
newStyle->deref(document()->renderArena());
goto diff;
}
else if (ch != NoChange) {
if (newStyle)
setRenderStyle(newStyle);
}
else if (changed() && newStyle && (document()->usesSiblingRules() || document()->usesDescendantRules())) {
if (renderer())
renderer()->setStyleInternal(newStyle);
else
setRenderStyle(newStyle);
}
newStyle->deref(document()->renderArena());
if (change != Force) {
if (document()->usesDescendantRules())
change = Force;
else
change = ch;
}
}
for (Node *n = fastFirstChild(); n; n = n->nextSibling()) {
if (change >= Inherit || n->isTextNode() || n->hasChangedChild() || n->changed())
n->recalcStyle(change);
}
setChanged(false);
setHasChangedChild(false);
diff:
if (WKObservingContentChanges() &&
renderStyle() &&
(previousDisplay == NONE && renderStyle()->display() != NONE ||
previousVisibility == HIDDEN && renderStyle()->visibility() != HIDDEN ||
previousImplicitVisibility == HIDDEN && implicitVisibility() == VISIBLE))
WKSetObservedContentChange(WKContentVisibilityChange);
}
bool Element::childTypeAllowed(NodeType type)
{
switch (type) {
case ELEMENT_NODE:
case TEXT_NODE:
case COMMENT_NODE:
case PROCESSING_INSTRUCTION_NODE:
case CDATA_SECTION_NODE:
case ENTITY_REFERENCE_NODE:
return true;
break;
default:
return false;
}
}
void Element::dispatchAttrRemovalEvent(Attribute*)
{
assert(!eventDispatchForbidden());
#if 0
if (!document()->hasListenerType(Document::DOMATTRMODIFIED_LISTENER))
return;
ExceptionCode ec = 0;
dispatchEvent(new MutationEvent(DOMAttrModifiedEvent, true, false, attr, attr->value(),
attr->value(), document()->attrName(attr->id()), MutationEvent::REMOVAL), ec);
#endif
}
void Element::dispatchAttrAdditionEvent(Attribute *attr)
{
assert(!eventDispatchForbidden());
#if 0
if (!document()->hasListenerType(Document::DOMATTRMODIFIED_LISTENER))
return;
ExceptionCode ec = 0;
dispatchEvent(new MutationEvent(DOMAttrModifiedEvent, true, false, attr, attr->value(),
attr->value(),document()->attrName(attr->id()), MutationEvent::ADDITION), ec);
#endif
}
String Element::openTagStartToString() const
{
String result = "<" + nodeName();
NamedAttrMap *attrMap = attributes(true);
if (attrMap) {
unsigned numAttrs = attrMap->length();
for (unsigned i = 0; i < numAttrs; i++) {
result += " ";
Attribute *attribute = attrMap->attributeItem(i);
result += attribute->name().toString();
if (!attribute->value().isNull()) {
result += "=\"";
result += attribute->value();
result += "\"";
}
}
}
return result;
}
String Element::toString() const
{
String result = openTagStartToString();
if (hasChildNodes()) {
result += ">";
for (Node *child = firstChild(); child != NULL; child = child->nextSibling()) {
result += child->toString();
}
result += "</";
result += nodeName();
result += ">";
} else {
result += " />";
}
return result;
}
void Element::updateId(const AtomicString& oldId, const AtomicString& newId)
{
if (!inDocument())
return;
if (oldId == newId)
return;
Document* doc = document();
if (!oldId.isEmpty())
doc->removeElementById(oldId, this);
if (!newId.isEmpty())
doc->addElementById(newId, this);
}
#ifndef NDEBUG
void Element::dump(TextStream *stream, DeprecatedString ind) const
{
updateStyleAttributeIfNeeded();
if (namedAttrMap) {
for (unsigned i = 0; i < namedAttrMap->length(); i++) {
Attribute *attr = namedAttrMap->attributeItem(i);
*stream << " " << attr->name().localName().deprecatedString().ascii()
<< "=\"" << attr->value().deprecatedString().ascii() << "\"";
}
}
ContainerNode::dump(stream,ind);
}
#endif
#ifndef NDEBUG
void Element::formatForDebugger(char *buffer, unsigned length) const
{
String result;
String s;
s = nodeName();
if (s.length() > 0) {
result += s;
}
s = getAttribute(idAttr);
if (s.length() > 0) {
if (result.length() > 0)
result += "; ";
result += "id=";
result += s;
}
s = getAttribute(classAttr);
if (s.length() > 0) {
if (result.length() > 0)
result += "; ";
result += "class=";
result += s;
}
strncpy(buffer, result.deprecatedString().latin1(), length - 1);
}
#endif
PassRefPtr<Attr> Element::setAttributeNode(Attr *attr, ExceptionCode& ec)
{
ASSERT(attr);
return static_pointer_cast<Attr>(attributes(false)->setNamedItem(attr, ec));
}
PassRefPtr<Attr> Element::removeAttributeNode(Attr *attr, ExceptionCode& ec)
{
if (!attr || attr->ownerElement() != this) {
ec = NOT_FOUND_ERR;
return 0;
}
if (document() != attr->document()) {
ec = WRONG_DOCUMENT_ERR;
return 0;
}
NamedAttrMap *attrs = attributes(true);
if (!attrs)
return 0;
return static_pointer_cast<Attr>(attrs->removeNamedItem(attr->qualifiedName(), ec));
}
void Element::setAttributeNS(const String& namespaceURI, const String& qualifiedName, const String& value, ExceptionCode& ec)
{
String prefix, localName;
if (!Document::parseQualifiedName(qualifiedName, prefix, localName)) {
ec = INVALID_CHARACTER_ERR;
return;
}
setAttribute(QualifiedName(prefix.impl(), localName.impl(), namespaceURI.impl()), value.impl(), ec);
}
void Element::removeAttribute(const String& name, ExceptionCode& ec)
{
String localName = inHTMLDocument(this) ? name.lower() : name;
if (namedAttrMap) {
namedAttrMap->removeNamedItem(localName, ec);
if (ec == NOT_FOUND_ERR)
ec = 0;
}
}
void Element::removeAttributeNS(const String& namespaceURI, const String& localName, ExceptionCode& ec)
{
removeAttribute(QualifiedName(nullAtom, localName.impl(), namespaceURI.impl()), ec);
}
PassRefPtr<Attr> Element::getAttributeNode(const String& name)
{
NamedAttrMap *attrs = attributes(true);
if (!attrs)
return 0;
String localName = inHTMLDocument(this) ? name.lower() : name;
return static_pointer_cast<Attr>(attrs->getNamedItem(localName));
}
PassRefPtr<Attr> Element::getAttributeNodeNS(const String& namespaceURI, const String& localName)
{
NamedAttrMap *attrs = attributes(true);
if (!attrs)
return 0;
return static_pointer_cast<Attr>(attrs->getNamedItem(QualifiedName(nullAtom, localName.impl(), namespaceURI.impl())));
}
bool Element::hasAttribute(const String& name) const
{
NamedAttrMap *attrs = attributes(true);
if (!attrs)
return false;
String localName = inHTMLDocument(this) ? name.lower() : name;
return attrs->getAttributeItem(localName);
}
bool Element::hasAttributeNS(const String& namespaceURI, const String& localName) const
{
NamedAttrMap *attrs = attributes(true);
if (!attrs)
return false;
return attrs->getAttributeItem(QualifiedName(nullAtom, localName.impl(), namespaceURI.impl()));
}
CSSStyleDeclaration *Element::style()
{
return 0;
}
void Element::focus()
{
Document* doc = document();
doc->updateLayout();
if (!supportsFocus())
return;
doc->setFocusNode(this);
if (!isFocusable()) {
setNeedsFocusAppearanceUpdate(true);
return;
}
updateFocusAppearance();
}
void Element::updateFocusAppearance()
{
if (this == rootEditableElement()) {
Frame* frame = document()->frame();
if (!frame)
return;
Selection s = hasTagName(htmlTag) || hasTagName(bodyTag) ? Selection(Position(this, 0), DOWNSTREAM) : Selection::selectionFromContentsOfNode(this);
SelectionController sc(s);
if (frame->shouldChangeSelection(sc)) {
frame->setSelection(sc);
frame->revealSelection();
}
} else if (renderer() && !renderer()->isWidget())
renderer()->enclosingLayer()->scrollRectToVisible(getRect());
}
void Element::updateFocusAppearanceTimerFired(Timer<Element>*)
{
stopUpdateFocusAppearanceTimer();
Document* doc = document();
doc->updateLayout();
if (isFocusable())
updateFocusAppearance();
}
void Element::blur()
{
stopUpdateFocusAppearanceTimer();
Document* doc = document();
if (doc->focusNode() == this)
doc->setFocusNode(0);
}
void Element::stopUpdateFocusAppearanceTimer()
{
if (m_updateFocusAppearanceTimer.isActive()) {
m_updateFocusAppearanceTimer.stop();
setNeedsFocusAppearanceUpdate(false);
}
}
}