1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259
|
/*
* 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) 2004-2019 Apple Inc. All rights reserved.
* Copyright (C) 2009 Ericsson AB. 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 "HTMLIFrameElement.h"
#include "CSSPropertyNames.h"
#include "CommonAtomStrings.h"
#include "DOMTokenList.h"
#include "Document.h"
#include "DocumentInlines.h"
#include "ElementInlines.h"
#include "HTMLNames.h"
#include "HTMLParserIdioms.h"
#include "LazyLoadFrameObserver.h"
#include "LocalFrame.h"
#include "NodeName.h"
#include "Quirks.h"
#include "RenderIFrame.h"
#include "ScriptController.h"
#include "ScriptableDocumentParser.h"
#include "Settings.h"
#include "TrustedType.h"
#include <wtf/TZoneMallocInlines.h>
#include <wtf/text/MakeString.h>
namespace WebCore {
WTF_MAKE_TZONE_OR_ISO_ALLOCATED_IMPL(HTMLIFrameElement);
using namespace HTMLNames;
inline HTMLIFrameElement::HTMLIFrameElement(const QualifiedName& tagName, Document& document)
: HTMLFrameElementBase(tagName, document)
{
ASSERT(hasTagName(iframeTag));
#if ENABLE(CONTENT_EXTENSIONS)
if (document.settings().iFrameResourceMonitoringEnabled())
setInitiatorSourceURL(document.currentSourceURL());
#endif
}
HTMLIFrameElement::~HTMLIFrameElement() = default;
Ref<HTMLIFrameElement> HTMLIFrameElement::create(const QualifiedName& tagName, Document& document)
{
return adoptRef(*new HTMLIFrameElement(tagName, document));
}
int HTMLIFrameElement::defaultTabIndex() const
{
return 0;
}
DOMTokenList& HTMLIFrameElement::sandbox()
{
if (!m_sandbox) {
m_sandbox = makeUniqueWithoutRefCountedCheck<DOMTokenList>(*this, sandboxAttr, [](Document&, StringView token) {
return SecurityContext::isSupportedSandboxPolicy(token);
});
}
return *m_sandbox;
}
bool HTMLIFrameElement::hasPresentationalHintsForAttribute(const QualifiedName& name) const
{
switch (name.nodeName()) {
case AttributeNames::widthAttr:
case AttributeNames::heightAttr:
case AttributeNames::frameborderAttr:
return true;
default:
break;
}
return HTMLFrameElementBase::hasPresentationalHintsForAttribute(name);
}
void HTMLIFrameElement::collectPresentationalHintsForAttribute(const QualifiedName& name, const AtomString& value, MutableStyleProperties& style)
{
switch (name.nodeName()) {
case AttributeNames::widthAttr:
addHTMLLengthToStyle(style, CSSPropertyWidth, value);
break;
case AttributeNames::heightAttr:
addHTMLLengthToStyle(style, CSSPropertyHeight, value);
break;
case AttributeNames::alignAttr:
applyAlignmentAttributeToStyle(value, style);
break;
case AttributeNames::frameborderAttr:
// Frame border doesn't really match the HTML4 spec definition for iframes. It simply adds
// a presentational hint that the border should be off if set to zero.
if (!parseHTMLInteger(value).value_or(0)) {
// Add a rule that nulls out our border width.
addPropertyToPresentationalHintStyle(style, CSSPropertyBorderWidth, 0, CSSUnitType::CSS_PX);
}
break;
default:
HTMLFrameElementBase::collectPresentationalHintsForAttribute(name, value, style);
break;
}
}
void HTMLIFrameElement::attributeChanged(const QualifiedName& name, const AtomString& oldValue, const AtomString& newValue, AttributeModificationReason attributeModificationReason)
{
switch (name.nodeName()) {
case AttributeNames::sandboxAttr: {
if (m_sandbox)
m_sandbox->associatedAttributeValueChanged();
String invalidTokens;
setSandboxFlags(newValue.isNull() ? SandboxFlags { } : SecurityContext::parseSandboxPolicy(newValue, invalidTokens));
if (!invalidTokens.isNull())
document().addConsoleMessage(MessageSource::Other, MessageLevel::Error, makeString("Error while parsing the 'sandbox' attribute: "_s, invalidTokens));
break;
}
case AttributeNames::allowAttr:
case AttributeNames::allowfullscreenAttr:
case AttributeNames::webkitallowfullscreenAttr:
break;
case AttributeNames::loadingAttr:
// Allow loading=eager to load the frame immediately if the lazy load was started, but
// do not allow the reverse situation since the eager load is already started.
if (m_lazyLoadFrameObserver && !equalLettersIgnoringASCIICase(newValue, "lazy"_s)) {
m_lazyLoadFrameObserver->unobserve();
loadDeferredFrame();
}
break;
case AttributeNames::srcdocAttr:
case AttributeNames::srcAttr:
FALLTHROUGH;
default:
HTMLFrameElementBase::attributeChanged(name, oldValue, newValue, attributeModificationReason);
break;
}
}
bool HTMLIFrameElement::rendererIsNeeded(const RenderStyle& style)
{
return style.display() != DisplayType::None && canLoad();
}
RenderPtr<RenderElement> HTMLIFrameElement::createElementRenderer(RenderStyle&& style, const RenderTreePosition&)
{
return createRenderer<RenderIFrame>(*this, WTFMove(style));
}
void HTMLIFrameElement::setReferrerPolicyForBindings(const AtomString& value)
{
setAttributeWithoutSynchronization(referrerpolicyAttr, value);
}
String HTMLIFrameElement::referrerPolicyForBindings() const
{
return referrerPolicyToString(referrerPolicy());
}
ReferrerPolicy HTMLIFrameElement::referrerPolicy() const
{
if (m_lazyLoadFrameObserver)
return m_lazyLoadFrameObserver->referrerPolicy();
return parseReferrerPolicy(attributeWithoutSynchronization(referrerpolicyAttr), ReferrerPolicySource::ReferrerPolicyAttribute).value_or(ReferrerPolicy::EmptyString);
}
const AtomString& HTMLIFrameElement::loading() const
{
return equalLettersIgnoringASCIICase(attributeWithoutSynchronization(HTMLNames::loadingAttr), "lazy"_s) ? lazyAtom() : eagerAtom();
}
void HTMLIFrameElement::setLoading(const AtomString& value)
{
setAttributeWithoutSynchronization(loadingAttr, value);
}
String HTMLIFrameElement::srcdoc() const
{
return attributeWithoutSynchronization(srcdocAttr);
}
ExceptionOr<void> HTMLIFrameElement::setSrcdoc(std::variant<RefPtr<TrustedHTML>, String>&& value)
{
auto stringValueHolder = trustedTypeCompliantString(*document().scriptExecutionContext(), WTFMove(value), "HTMLIFrameElement srcdoc"_s);
if (stringValueHolder.hasException())
return stringValueHolder.releaseException();
setAttributeWithoutSynchronization(srcdocAttr, AtomString { stringValueHolder.releaseReturnValue() });
return { };
}
static bool isFrameLazyLoadable(const Document& document, const URL& url, const AtomString& loadingAttributeValue)
{
if (!url.isValid() || url.isAboutBlank())
return false;
if (!document.frame() || !document.frame()->script().canExecuteScripts(ReasonForCallingCanExecuteScripts::NotAboutToExecuteScript))
return false;
return equalLettersIgnoringASCIICase(loadingAttributeValue, "lazy"_s);
}
bool HTMLIFrameElement::shouldLoadFrameLazily()
{
if (!m_lazyLoadFrameObserver && document().settings().lazyIframeLoadingEnabled() && !document().quirks().shouldDisableLazyIframeLoadingQuirk()) {
URL completeURL = document().completeURL(frameURL());
if (isFrameLazyLoadable(document(), completeURL, attributeWithoutSynchronization(HTMLNames::loadingAttr))) {
auto currentReferrerPolicy = referrerPolicy();
lazyLoadFrameObserver().observe(AtomString { completeURL.string() }, currentReferrerPolicy);
return true;
}
}
return false;
}
bool HTMLIFrameElement::isLazyLoadObserverActive() const
{
return !!m_lazyLoadFrameObserver;
}
void HTMLIFrameElement::loadDeferredFrame()
{
AtomString currentURL = frameURL();
setFrameURL(m_lazyLoadFrameObserver->frameURL());
if (isConnected())
openURL();
setFrameURL(currentURL);
m_lazyLoadFrameObserver = nullptr;
}
LazyLoadFrameObserver& HTMLIFrameElement::lazyLoadFrameObserver()
{
if (!m_lazyLoadFrameObserver)
m_lazyLoadFrameObserver = makeUnique<LazyLoadFrameObserver>(*this);
return *m_lazyLoadFrameObserver;
}
}
|