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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* (C) 2000 Simon Hausmann (hausmann@kde.org)
* (C) 2001 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2004-2017 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 "HTMLBodyElement.h"
#include "CSSImageValue.h"
#include "CSSParser.h"
#include "CSSValueKeywords.h"
#include "DOMWindow.h"
#include "DOMWrapperWorld.h"
#include "EventNames.h"
#include "Frame.h"
#include "FrameView.h"
#include "HTMLFrameElement.h"
#include "HTMLIFrameElement.h"
#include "HTMLNames.h"
#include "HTMLParserIdioms.h"
#include "StyleProperties.h"
#include <wtf/IsoMallocInlines.h>
#include <wtf/NeverDestroyed.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(HTMLBodyElement);
using namespace HTMLNames;
HTMLBodyElement::HTMLBodyElement(const QualifiedName& tagName, Document& document)
: HTMLElement(tagName, document)
{
ASSERT(hasTagName(bodyTag));
}
bool HTMLBodyElement::isFirstBodyElementOfDocument() const
{
// By spec http://dev.w3.org/csswg/cssom-view/#the-html-body-element
// "The HTML body element is the first body HTML element child of the root HTML element html."
return document().body() == this;
}
Ref<HTMLBodyElement> HTMLBodyElement::create(Document& document)
{
return adoptRef(*new HTMLBodyElement(bodyTag, document));
}
Ref<HTMLBodyElement> HTMLBodyElement::create(const QualifiedName& tagName, Document& document)
{
return adoptRef(*new HTMLBodyElement(tagName, document));
}
HTMLBodyElement::~HTMLBodyElement() = default;
bool HTMLBodyElement::isPresentationAttribute(const QualifiedName& name) const
{
if (name == backgroundAttr || name == marginwidthAttr || name == leftmarginAttr || name == marginheightAttr || name == topmarginAttr || name == bgcolorAttr || name == textAttr || name == bgpropertiesAttr)
return true;
return HTMLElement::isPresentationAttribute(name);
}
void HTMLBodyElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomicString& value, MutableStyleProperties& style)
{
if (name == backgroundAttr) {
String url = stripLeadingAndTrailingHTMLSpaces(value);
if (!url.isEmpty()) {
auto imageValue = CSSImageValue::create(document().completeURL(url));
imageValue.get().setInitiator(localName());
style.setProperty(CSSProperty(CSSPropertyBackgroundImage, WTFMove(imageValue)));
}
} else if (name == marginwidthAttr || name == leftmarginAttr) {
addHTMLLengthToStyle(style, CSSPropertyMarginRight, value);
addHTMLLengthToStyle(style, CSSPropertyMarginLeft, value);
} else if (name == marginheightAttr || name == topmarginAttr) {
addHTMLLengthToStyle(style, CSSPropertyMarginBottom, value);
addHTMLLengthToStyle(style, CSSPropertyMarginTop, value);
} else if (name == bgcolorAttr) {
addHTMLColorToStyle(style, CSSPropertyBackgroundColor, value);
} else if (name == textAttr) {
addHTMLColorToStyle(style, CSSPropertyColor, value);
} else if (name == bgpropertiesAttr) {
if (equalLettersIgnoringASCIICase(value, "fixed"))
addPropertyToPresentationAttributeStyle(style, CSSPropertyBackgroundAttachment, CSSValueFixed);
} else
HTMLElement::collectStyleForPresentationAttribute(name, value, style);
}
HTMLElement::EventHandlerNameMap HTMLBodyElement::createWindowEventHandlerNameMap()
{
static const QualifiedName* const table[] = {
&onbeforeunloadAttr.get(),
&onblurAttr.get(),
&onerrorAttr.get(),
&onfocusAttr.get(),
&onfocusinAttr.get(),
&onfocusoutAttr.get(),
&onhashchangeAttr.get(),
&onlanguagechangeAttr.get(),
&onloadAttr.get(),
&onmessageAttr.get(),
&onofflineAttr.get(),
&ononlineAttr.get(),
&onorientationchangeAttr.get(),
&onpagehideAttr.get(),
&onpageshowAttr.get(),
&onpopstateAttr.get(),
&onresizeAttr.get(),
&onscrollAttr.get(),
&onstorageAttr.get(),
&onunloadAttr.get(),
&onwebkitmouseforcechangedAttr.get(),
&onwebkitmouseforcedownAttr.get(),
&onwebkitmouseforceupAttr.get(),
&onwebkitmouseforcewillbeginAttr.get(),
&onwebkitwillrevealbottomAttr.get(),
&onwebkitwillrevealleftAttr.get(),
&onwebkitwillrevealrightAttr.get(),
&onwebkitwillrevealtopAttr.get(),
};
EventHandlerNameMap map;
populateEventHandlerNameMap(map, table);
return map;
}
const AtomicString& HTMLBodyElement::eventNameForWindowEventHandlerAttribute(const QualifiedName& attributeName)
{
static NeverDestroyed<EventHandlerNameMap> map = createWindowEventHandlerNameMap();
return eventNameForEventHandlerAttribute(attributeName, map.get());
}
void HTMLBodyElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
{
if (name == vlinkAttr || name == alinkAttr || name == linkAttr) {
if (value.isNull()) {
if (name == linkAttr)
document().resetLinkColor();
else if (name == vlinkAttr)
document().resetVisitedLinkColor();
else
document().resetActiveLinkColor();
} else {
Color color = CSSParser::parseColor(value, !document().inQuirksMode());
if (color.isValid()) {
if (name == linkAttr)
document().setLinkColor(color);
else if (name == vlinkAttr)
document().setVisitedLinkColor(color);
else
document().setActiveLinkColor(color);
}
}
invalidateStyleForSubtree();
return;
}
if (name == onselectionchangeAttr) {
document().setAttributeEventListener(eventNames().selectionchangeEvent, name, value, mainThreadNormalWorld());
return;
}
auto& eventName = eventNameForWindowEventHandlerAttribute(name);
if (!eventName.isNull()) {
document().setWindowAttributeEventListener(eventName, name, value, mainThreadNormalWorld());
return;
}
HTMLElement::parseAttribute(name, value);
}
Node::InsertedIntoAncestorResult HTMLBodyElement::insertedIntoAncestor(InsertionType insertionType, ContainerNode& parentOfInsertedTree)
{
HTMLElement::insertedIntoAncestor(insertionType, parentOfInsertedTree);
if (!insertionType.connectedToDocument)
return InsertedIntoAncestorResult::Done;
// FIXME: It's surprising this is web compatible since it means a marginwidth and marginheight attribute can
// magically appear on the <body> of all documents embedded through <iframe> or <frame>.
// FIXME: Perhaps this code should be in attach() instead of here.
auto ownerElement = makeRefPtr(document().ownerElement());
if (!is<HTMLFrameElementBase>(ownerElement))
return InsertedIntoAncestorResult::Done;
return InsertedIntoAncestorResult::NeedsPostInsertionCallback;
}
void HTMLBodyElement::didFinishInsertingNode()
{
auto ownerElement = makeRefPtr(document().ownerElement());
RELEASE_ASSERT(is<HTMLFrameElementBase>(ownerElement));
auto& ownerFrameElement = downcast<HTMLFrameElementBase>(*ownerElement);
// Read values from the owner before setting any attributes, since setting an attribute can run arbitrary
// JavaScript, which might delete the owner element.
int marginWidth = ownerFrameElement.marginWidth();
int marginHeight = ownerFrameElement.marginHeight();
if (marginWidth != -1)
setIntegralAttribute(marginwidthAttr, marginWidth);
if (marginHeight != -1)
setIntegralAttribute(marginheightAttr, marginHeight);
}
bool HTMLBodyElement::isURLAttribute(const Attribute& attribute) const
{
return attribute.name() == backgroundAttr || HTMLElement::isURLAttribute(attribute);
}
bool HTMLBodyElement::supportsFocus() const
{
return hasEditableStyle() || HTMLElement::supportsFocus();
}
static int adjustForZoom(int value, const Frame& frame)
{
double zoomFactor = frame.pageZoomFactor() * frame.frameScaleFactor();
if (zoomFactor == 1)
return value;
// Needed because of truncation (rather than rounding) when scaling up.
if (zoomFactor > 1)
value++;
return static_cast<int>(value / zoomFactor);
}
int HTMLBodyElement::scrollLeft()
{
if (isFirstBodyElementOfDocument()) {
document().updateLayoutIgnorePendingStylesheets();
RefPtr<Frame> frame = document().frame();
if (!frame)
return 0;
RefPtr<FrameView> view = frame->view();
if (!view)
return 0;
return adjustForZoom(view->contentsScrollPosition().x(), *frame);
}
return HTMLElement::scrollLeft();
}
void HTMLBodyElement::setScrollLeft(int scrollLeft)
{
if (isFirstBodyElementOfDocument()) {
document().updateLayoutIgnorePendingStylesheets();
RefPtr<Frame> frame = document().frame();
if (!frame)
return;
RefPtr<FrameView> view = frame->view();
if (!view)
return;
view->setScrollPosition(IntPoint(static_cast<int>(scrollLeft * frame->pageZoomFactor() * frame->frameScaleFactor()), view->scrollY()));
}
HTMLElement::setScrollLeft(scrollLeft);
}
int HTMLBodyElement::scrollTop()
{
if (isFirstBodyElementOfDocument()) {
document().updateLayoutIgnorePendingStylesheets();
RefPtr<Frame> frame = document().frame();
if (!frame)
return 0;
RefPtr<FrameView> view = frame->view();
if (!view)
return 0;
return adjustForZoom(view->contentsScrollPosition().y(), *frame);
}
return HTMLElement::scrollTop();
}
void HTMLBodyElement::setScrollTop(int scrollTop)
{
if (isFirstBodyElementOfDocument()) {
document().updateLayoutIgnorePendingStylesheets();
RefPtr<Frame> frame = document().frame();
if (!frame)
return;
RefPtr<FrameView> view = frame->view();
if (!view)
return;
view->setScrollPosition(IntPoint(view->scrollX(), static_cast<int>(scrollTop * frame->pageZoomFactor() * frame->frameScaleFactor())));
}
return HTMLElement::setScrollTop(scrollTop);
}
void HTMLBodyElement::scrollTo(const ScrollToOptions& options, ScrollClamping clamping)
{
if (isFirstBodyElementOfDocument()) {
// If the element is the HTML body element, document is in quirks mode, and the element is not potentially scrollable,
// invoke scroll() on window with options as the only argument, and terminate these steps.
// Note that WebKit always uses quirks mode document scrolling behavior. See Document::scrollingElement().
// FIXME: Scrolling an independently scrollable body is broken: webkit.org/b/161612.
auto window = makeRefPtr(document().domWindow());
if (!window)
return;
window->scrollTo(options);
return;
}
return HTMLElement::scrollTo(options, clamping);
}
int HTMLBodyElement::scrollHeight()
{
if (isFirstBodyElementOfDocument()) {
// Update the document's layout.
document().updateLayoutIgnorePendingStylesheets();
RefPtr<Frame> frame = document().frame();
if (!frame)
return 0;
RefPtr<FrameView> view = frame->view();
if (!view)
return 0;
return adjustForZoom(view->contentsHeight(), *frame);
}
return HTMLElement::scrollHeight();
}
int HTMLBodyElement::scrollWidth()
{
if (isFirstBodyElementOfDocument()) {
// Update the document's layout.
document().updateLayoutIgnorePendingStylesheets();
RefPtr<Frame> frame = document().frame();
if (!frame)
return 0;
RefPtr<FrameView> view = frame->view();
if (!view)
return 0;
return adjustForZoom(view->contentsWidth(), *frame);
}
return HTMLElement::scrollWidth();
}
void HTMLBodyElement::addSubresourceAttributeURLs(ListHashSet<URL>& urls) const
{
HTMLElement::addSubresourceAttributeURLs(urls);
addSubresourceURL(urls, document().completeURL(attributeWithoutSynchronization(backgroundAttr)));
}
} // namespace WebCore