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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* (C) 2000 Stefan Schimanski (1Stein@gmx.de)
* Copyright (C) 2004-2017 Apple Inc. All rights reserved.
* Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
*
* 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 "HTMLObjectElement.h"
#include "Attribute.h"
#include "CSSValueKeywords.h"
#include "CachedImage.h"
#include "DOMFormData.h"
#include "ElementIterator.h"
#include "Frame.h"
#include "FrameLoader.h"
#include "HTMLDocument.h"
#include "HTMLFormElement.h"
#include "HTMLImageLoader.h"
#include "HTMLMetaElement.h"
#include "HTMLNames.h"
#include "HTMLParamElement.h"
#include "HTMLParserIdioms.h"
#include "MIMETypeRegistry.h"
#include "NodeList.h"
#include "Page.h"
#include "PluginViewBase.h"
#include "RenderEmbeddedObject.h"
#include "RenderImage.h"
#include "RenderWidget.h"
#include "Settings.h"
#include "SubframeLoader.h"
#include "Text.h"
#include "Widget.h"
#include <wtf/IsoMallocInlines.h>
#include <wtf/Ref.h>
#include <wtf/RobinHoodHashSet.h>
#if PLATFORM(IOS_FAMILY)
#include "RuntimeApplicationChecks.h"
#endif
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(HTMLObjectElement);
using namespace HTMLNames;
inline HTMLObjectElement::HTMLObjectElement(const QualifiedName& tagName, Document& document, HTMLFormElement* form)
: HTMLPlugInImageElement(tagName, document)
, FormAssociatedElement(form)
{
ASSERT(hasTagName(objectTag));
}
Ref<HTMLObjectElement> HTMLObjectElement::create(const QualifiedName& tagName, Document& document, HTMLFormElement* form)
{
return adoptRef(*new HTMLObjectElement(tagName, document, form));
}
HTMLObjectElement::~HTMLObjectElement()
{
clearForm();
}
int HTMLObjectElement::defaultTabIndex() const
{
return 0;
}
bool HTMLObjectElement::hasPresentationalHintsForAttribute(const QualifiedName& name) const
{
if (name == borderAttr)
return true;
return HTMLPlugInImageElement::hasPresentationalHintsForAttribute(name);
}
void HTMLObjectElement::collectPresentationalHintsForAttribute(const QualifiedName& name, const AtomString& value, MutableStyleProperties& style)
{
if (name == borderAttr)
applyBorderAttributeToStyle(value, style);
else
HTMLPlugInImageElement::collectPresentationalHintsForAttribute(name, value, style);
}
void HTMLObjectElement::parseAttribute(const QualifiedName& name, const AtomString& value)
{
bool invalidateRenderer = false;
if (name == formAttr)
formAttributeChanged();
else if (name == typeAttr) {
m_serviceType = value.string().left(value.find(';')).convertToASCIILowercase();
invalidateRenderer = !hasAttributeWithoutSynchronization(classidAttr);
setNeedsWidgetUpdate(true);
} else if (name == dataAttr) {
m_url = stripLeadingAndTrailingHTMLSpaces(value);
invalidateRenderer = !hasAttributeWithoutSynchronization(classidAttr);
setNeedsWidgetUpdate(true);
updateImageLoaderWithNewURLSoon();
} else if (name == classidAttr) {
invalidateRenderer = true;
setNeedsWidgetUpdate(true);
} else
HTMLPlugInImageElement::parseAttribute(name, value);
if (!invalidateRenderer || !isConnected() || !renderer())
return;
m_useFallbackContent = false;
scheduleUpdateForAfterStyleResolution();
invalidateStyleAndRenderersForSubtree();
}
static void mapDataParamToSrc(Vector<String>& paramNames, Vector<String>& paramValues)
{
// Some plugins don't understand the "data" attribute of the OBJECT tag (i.e. Real and WMP require "src" attribute).
bool foundSrcParam = false;
String dataParamValue;
for (unsigned i = 0; i < paramNames.size(); ++i) {
if (equalLettersIgnoringASCIICase(paramNames[i], "src"))
foundSrcParam = true;
else if (equalLettersIgnoringASCIICase(paramNames[i], "data"))
dataParamValue = paramValues[i];
}
if (!foundSrcParam && !dataParamValue.isNull()) {
paramNames.append("src"_s);
paramValues.append(WTFMove(dataParamValue));
}
}
// FIXME: This function should not deal with url or serviceType!
void HTMLObjectElement::parametersForPlugin(Vector<String>& paramNames, Vector<String>& paramValues, String& url, String& serviceType)
{
HashSet<StringImpl*, ASCIICaseInsensitiveHash> uniqueParamNames;
String urlParameter;
// Scan the PARAM children and store their name/value pairs.
// Get the URL and type from the params if we don't already have them.
for (auto& param : childrenOfType<HTMLParamElement>(*this)) {
String name = param.name();
if (name.isEmpty())
continue;
uniqueParamNames.add(name.impl());
paramNames.append(param.name());
paramValues.append(param.value());
// FIXME: url adjustment does not belong in this function.
if (url.isEmpty() && urlParameter.isEmpty() && (equalLettersIgnoringASCIICase(name, "src") || equalLettersIgnoringASCIICase(name, "movie") || equalLettersIgnoringASCIICase(name, "code") || equalLettersIgnoringASCIICase(name, "url")))
urlParameter = stripLeadingAndTrailingHTMLSpaces(param.value());
// FIXME: serviceType calculation does not belong in this function.
if (serviceType.isEmpty() && equalLettersIgnoringASCIICase(name, "type")) {
serviceType = param.value();
size_t pos = serviceType.find(';');
if (pos != notFound)
serviceType = serviceType.left(pos);
}
}
// When OBJECT is used for an applet via Sun's Java plugin, the CODEBASE attribute in the tag
// points to the Java plugin itself (an ActiveX component) while the actual applet CODEBASE is
// in a PARAM tag. See <http://java.sun.com/products/plugin/1.2/docs/tags.html>. This means
// we have to explicitly suppress the tag's CODEBASE attribute if there is none in a PARAM,
// else our Java plugin will misinterpret it. [4004531]
String codebase;
if (MIMETypeRegistry::isJavaAppletMIMEType(serviceType)) {
codebase = "codebase";
uniqueParamNames.add(codebase.impl()); // pretend we found it in a PARAM already
}
// Turn the attributes of the <object> element into arrays, but don't override <param> values.
if (hasAttributes()) {
for (const Attribute& attribute : attributesIterator()) {
const AtomString& name = attribute.name().localName();
if (!uniqueParamNames.contains(name.impl())) {
paramNames.append(name.string());
paramValues.append(attribute.value().string());
}
}
}
mapDataParamToSrc(paramNames, paramValues);
// HTML5 says that an object resource's URL is specified by the object's data
// attribute, not by a param element. However, for compatibility, allow the
// resource's URL to be given by a param named "src", "movie", "code" or "url"
// if we know that resource points to a plug-in.
if (url.isEmpty() && !urlParameter.isEmpty()) {
auto& loader = document().frame()->loader().subframeLoader();
if (loader.resourceWillUsePlugin(urlParameter, serviceType))
url = urlParameter;
}
}
bool HTMLObjectElement::hasFallbackContent() const
{
for (RefPtr<Node> child = firstChild(); child; child = child->nextSibling()) {
// Ignore whitespace-only text, and <param> tags, any other content is fallback content.
if (is<Text>(*child)) {
if (!downcast<Text>(*child).data().isAllSpecialCharacters<isHTMLSpace>())
return true;
} else if (!is<HTMLParamElement>(*child))
return true;
}
return false;
}
bool HTMLObjectElement::hasValidClassId()
{
if (MIMETypeRegistry::isJavaAppletMIMEType(serviceType()) && protocolIs(attributeWithoutSynchronization(classidAttr), "java"))
return true;
// HTML5 says that fallback content should be rendered if a non-empty
// classid is specified for which the UA can't find a suitable plug-in.
return attributeWithoutSynchronization(classidAttr).isEmpty();
}
// FIXME: This should be unified with HTMLEmbedElement::updateWidget and
// moved down into HTMLPluginImageElement.cpp
void HTMLObjectElement::updateWidget(CreatePlugins createPlugins)
{
ASSERT(!renderEmbeddedObject()->isPluginUnavailable());
ASSERT(needsWidgetUpdate());
// FIXME: This should ASSERT isFinishedParsingChildren() instead.
if (!isFinishedParsingChildren()) {
setNeedsWidgetUpdate(false);
return;
}
// FIXME: I'm not sure it's ever possible to get into updateWidget during a
// removal, but just in case we should avoid loading the frame to prevent
// security bugs.
if (!SubframeLoadingDisabler::canLoadFrame(*this)) {
setNeedsWidgetUpdate(false);
return;
}
String url = this->url();
String serviceType = this->serviceType();
// FIXME: These should be joined into a PluginParameters class.
Vector<String> paramNames;
Vector<String> paramValues;
parametersForPlugin(paramNames, paramValues, url, serviceType);
// Note: url is modified above by parametersForPlugin.
if (!canLoadURL(url)) {
setNeedsWidgetUpdate(false);
return;
}
// FIXME: It's unfortunate that we have this special case here.
// See http://trac.webkit.org/changeset/25128 and the plugins/netscape-plugin-setwindow-size.html test.
if (createPlugins == CreatePlugins::No && wouldLoadAsPlugIn(url, serviceType))
return;
setNeedsWidgetUpdate(false);
Ref<HTMLObjectElement> protectedThis(*this); // beforeload and plugin loading can make arbitrary DOM mutations.
bool beforeLoadAllowedLoad = guardedDispatchBeforeLoadEvent(url);
if (!renderer()) // Do not load the plugin if beforeload removed this element or its renderer.
return;
// Dispatching a beforeLoad event could have executed code that changed the document.
// Make sure the URL is still safe to load.
bool success = beforeLoadAllowedLoad && hasValidClassId() && canLoadURL(url);
if (success)
success = requestObject(url, serviceType, paramNames, paramValues);
if (!success && hasFallbackContent())
renderFallbackContent();
}
Node::InsertedIntoAncestorResult HTMLObjectElement::insertedIntoAncestor(InsertionType insertionType, ContainerNode& parentOfInsertedTree)
{
HTMLPlugInImageElement::insertedIntoAncestor(insertionType, parentOfInsertedTree);
FormAssociatedElement::insertedIntoAncestor(insertionType, parentOfInsertedTree);
return InsertedIntoAncestorResult::NeedsPostInsertionCallback;
}
void HTMLObjectElement::didFinishInsertingNode()
{
resetFormOwner();
}
void HTMLObjectElement::removedFromAncestor(RemovalType removalType, ContainerNode& oldParentOfRemovedTree)
{
HTMLPlugInImageElement::removedFromAncestor(removalType, oldParentOfRemovedTree);
FormAssociatedElement::removedFromAncestor(removalType, oldParentOfRemovedTree);
}
void HTMLObjectElement::childrenChanged(const ChildChange& change)
{
updateExposedState();
if (isConnected() && !m_useFallbackContent) {
setNeedsWidgetUpdate(true);
scheduleUpdateForAfterStyleResolution();
invalidateStyleForSubtree();
}
HTMLPlugInImageElement::childrenChanged(change);
}
bool HTMLObjectElement::isURLAttribute(const Attribute& attribute) const
{
return attribute.name() == dataAttr || attribute.name() == codebaseAttr || HTMLPlugInImageElement::isURLAttribute(attribute);
}
const AtomString& HTMLObjectElement::imageSourceURL() const
{
return attributeWithoutSynchronization(dataAttr);
}
void HTMLObjectElement::renderFallbackContent()
{
if (m_useFallbackContent)
return;
if (!isConnected())
return;
scheduleUpdateForAfterStyleResolution();
invalidateStyleAndRenderersForSubtree();
// Before we give up and use fallback content, check to see if this is a MIME type issue.
auto* loader = imageLoader();
if (loader && loader->image() && loader->image()->status() != CachedResource::LoadError) {
m_serviceType = loader->image()->response().mimeType();
if (!isImageType()) {
// If we don't think we have an image type anymore, then clear the image from the loader.
loader->clearImage();
return;
}
}
m_useFallbackContent = true;
}
static inline bool preventsParentObjectFromExposure(const Element& child)
{
static NeverDestroyed mostKnownTags = [] {
MemoryCompactLookupOnlyRobinHoodHashSet<QualifiedName> set;
auto* tags = HTMLNames::getHTMLTags();
set.reserveInitialCapacity(HTMLNames::HTMLTagsCount);
for (size_t i = 0; i < HTMLNames::HTMLTagsCount; i++) {
auto& tag = *tags[i];
// Only the param element was explicitly mentioned in the HTML specification rule
// we were trying to implement, but these are other known HTML elements that we
// have decided, over the years, to treat as children that do not prevent object
// names from being exposed.
if (tag == bgsoundTag
|| tag == commandTag
|| tag == detailsTag
|| tag == figcaptionTag
|| tag == figureTag
|| tag == paramTag
|| tag == summaryTag
|| tag == trackTag)
continue;
set.add(tag);
}
return set;
}();
return mostKnownTags.get().contains(child.tagQName());
}
static inline bool preventsParentObjectFromExposure(const Node& child)
{
if (is<Element>(child))
return preventsParentObjectFromExposure(downcast<Element>(child));
if (is<Text>(child))
return !downcast<Text>(child).data().isAllSpecialCharacters<isHTMLSpace>();
return true;
}
static inline bool shouldBeExposed(const HTMLObjectElement& element)
{
// FIXME: This should be redone to use the concept of an exposed object element,
// as documented in the HTML specification section describing DOM tree accessors.
// The rule we try to implement here, from older HTML specifications, is "object elements
// with no children other than param elements, unknown elements and whitespace can be found
// by name in a document, and other object elements cannot".
for (RefPtr child = element.firstChild(); child; child = child->nextSibling()) {
if (preventsParentObjectFromExposure(*child))
return false;
}
return true;
}
void HTMLObjectElement::updateExposedState()
{
bool wasExposed = std::exchange(m_isExposed, shouldBeExposed(*this));
if (m_isExposed != wasExposed && isConnected() && !isInShadowTree() && is<HTMLDocument>(document())) {
auto& document = downcast<HTMLDocument>(this->document());
auto& id = getIdAttribute();
if (!id.isEmpty()) {
if (m_isExposed)
document.addDocumentNamedItem(*id.impl(), *this);
else
document.removeDocumentNamedItem(*id.impl(), *this);
}
auto& name = getNameAttribute();
if (!name.isEmpty() && id != name) {
if (m_isExposed)
document.addDocumentNamedItem(*name.impl(), *this);
else
document.removeDocumentNamedItem(*name.impl(), *this);
}
}
}
bool HTMLObjectElement::containsJavaApplet() const
{
if (MIMETypeRegistry::isJavaAppletMIMEType(attributeWithoutSynchronization(typeAttr)))
return true;
for (auto& child : childrenOfType<Element>(*this)) {
if (child.hasTagName(paramTag) && equalLettersIgnoringASCIICase(child.getNameAttribute(), "type")
&& MIMETypeRegistry::isJavaAppletMIMEType(child.attributeWithoutSynchronization(valueAttr).string()))
return true;
if (child.hasTagName(objectTag) && downcast<HTMLObjectElement>(child).containsJavaApplet())
return true;
if (child.hasTagName(appletTag))
return true;
}
return false;
}
void HTMLObjectElement::addSubresourceAttributeURLs(ListHashSet<URL>& urls) const
{
HTMLPlugInImageElement::addSubresourceAttributeURLs(urls);
addSubresourceURL(urls, document().completeURL(attributeWithoutSynchronization(dataAttr)));
}
void HTMLObjectElement::didMoveToNewDocument(Document& oldDocument, Document& newDocument)
{
FormAssociatedElement::didMoveToNewDocument(oldDocument);
HTMLPlugInImageElement::didMoveToNewDocument(oldDocument, newDocument);
}
bool HTMLObjectElement::canContainRangeEndPoint() const
{
// Call through to HTMLElement because HTMLPlugInElement::canContainRangeEndPoint
// returns false unconditionally. An object element using fallback content is
// treated like a generic HTML element.
return m_useFallbackContent && HTMLElement::canContainRangeEndPoint();
}
}