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
|
/*
* 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 "ElementInlines.h"
#include "Frame.h"
#include "HTMLNames.h"
#include "HTMLParserIdioms.h"
#include "LazyLoadFrameObserver.h"
#include "RenderIFrame.h"
#include "ScriptController.h"
#include "ScriptableDocumentParser.h"
#include "Settings.h"
#include <wtf/IsoMallocInlines.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(HTMLIFrameElement);
using namespace HTMLNames;
inline HTMLIFrameElement::HTMLIFrameElement(const QualifiedName& tagName, Document& document)
: HTMLFrameElementBase(tagName, document)
{
ASSERT(hasTagName(iframeTag));
}
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 = makeUnique<DOMTokenList>(*this, sandboxAttr, [](Document&, StringView token) {
return SecurityContext::isSupportedSandboxPolicy(token);
});
}
return *m_sandbox;
}
bool HTMLIFrameElement::hasPresentationalHintsForAttribute(const QualifiedName& name) const
{
if (name == widthAttr || name == heightAttr || name == frameborderAttr)
return true;
return HTMLFrameElementBase::hasPresentationalHintsForAttribute(name);
}
void HTMLIFrameElement::collectPresentationalHintsForAttribute(const QualifiedName& name, const AtomString& value, MutableStyleProperties& style)
{
if (name == widthAttr)
addHTMLLengthToStyle(style, CSSPropertyWidth, value);
else if (name == heightAttr)
addHTMLLengthToStyle(style, CSSPropertyHeight, value);
else if (name == alignAttr)
applyAlignmentAttributeToStyle(value, style);
else if (name == 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);
}
} else
HTMLFrameElementBase::collectPresentationalHintsForAttribute(name, value, style);
}
void HTMLIFrameElement::parseAttribute(const QualifiedName& name, const AtomString& value)
{
if (name == sandboxAttr) {
if (m_sandbox)
m_sandbox->associatedAttributeValueChanged(value);
String invalidTokens;
setSandboxFlags(value.isNull() ? SandboxNone : SecurityContext::parseSandboxPolicy(value, invalidTokens));
if (!invalidTokens.isNull())
document().addConsoleMessage(MessageSource::Other, MessageLevel::Error, "Error while parsing the 'sandbox' attribute: " + invalidTokens);
} else if (name == allowAttr || name == allowfullscreenAttr || name == webkitallowfullscreenAttr) {
m_featurePolicy = std::nullopt;
} else if (name == 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(value, "lazy"_s)) {
m_lazyLoadFrameObserver->unobserve();
loadDeferredFrame();
}
} else
HTMLFrameElementBase::parseAttribute(name, value);
}
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();
if (document().settings().referrerPolicyAttributeEnabled())
return parseReferrerPolicy(attributeWithoutSynchronization(referrerpolicyAttr), ReferrerPolicySource::ReferrerPolicyAttribute).value_or(ReferrerPolicy::EmptyString);
return ReferrerPolicy::EmptyString;
}
const FeaturePolicy& HTMLIFrameElement::featurePolicy() const
{
if (!m_featurePolicy)
m_featurePolicy = FeaturePolicy::parse(document(), *this, attributeWithoutSynchronization(allowAttr));
return *m_featurePolicy;
}
const AtomString& HTMLIFrameElement::loadingForBindings() const
{
return equalLettersIgnoringASCIICase(attributeWithoutSynchronization(HTMLNames::loadingAttr), "lazy"_s) ? lazyAtom() : eagerAtom();
}
void HTMLIFrameElement::setLoadingForBindings(const AtomString& value)
{
setAttributeWithoutSynchronization(loadingAttr, value);
}
static bool isFrameLazyLoadable(const Document& document, const AtomString& loadingAttributeValue)
{
if (!document.frame() || !document.frame()->script().canExecuteScripts(NotAboutToExecuteScript))
return false;
return equalLettersIgnoringASCIICase(loadingAttributeValue, "lazy"_s);
}
bool HTMLIFrameElement::shouldLoadFrameLazily()
{
if (!m_lazyLoadFrameObserver && document().settings().lazyIframeLoadingEnabled()) {
if (isFrameLazyLoadable(document(), attributeWithoutSynchronization(HTMLNames::loadingAttr))) {
auto currentReferrerPolicy = referrerPolicy();
URL completeURL = document().completeURL(frameURL());
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;
}
}
|
