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
|
/*
* 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, 2005, 2006, 2008, 2009, 2011 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 "third_party/blink/renderer/core/html/html_embed_element.h"
#include "third_party/blink/renderer/core/css/css_property_names.h"
#include "third_party/blink/renderer/core/dom/attribute.h"
#include "third_party/blink/renderer/core/dom/element_traversal.h"
#include "third_party/blink/renderer/core/dom/node_computed_style.h"
#include "third_party/blink/renderer/core/dom/shadow_root.h"
#include "third_party/blink/renderer/core/frame/local_frame.h"
#include "third_party/blink/renderer/core/frame/local_frame_client.h"
#include "third_party/blink/renderer/core/html/html_image_loader.h"
#include "third_party/blink/renderer/core/html/html_object_element.h"
#include "third_party/blink/renderer/core/html/parser/html_parser_idioms.h"
#include "third_party/blink/renderer/core/html/plugin_document.h"
#include "third_party/blink/renderer/core/html_names.h"
#include "third_party/blink/renderer/core/layout/layout_embedded_content.h"
#include "third_party/blink/renderer/core/layout/layout_embedded_object.h"
namespace blink {
HTMLEmbedElement::HTMLEmbedElement(Document& document,
const CreateElementFlags flags)
: HTMLPlugInElement(html_names::kEmbedTag,
document,
flags,
kShouldPreferPlugInsForImages) {
EnsureUserAgentShadowRoot();
}
const AttrNameToTrustedType& HTMLEmbedElement::GetCheckedAttributeTypes()
const {
DEFINE_STATIC_LOCAL(AttrNameToTrustedType, attribute_map,
({{"src", SpecificTrustedType::kScriptURL}}));
return attribute_map;
}
static inline LayoutEmbeddedContent* FindPartLayoutObject(const Node* n) {
if (!n->GetLayoutObject())
n = Traversal<HTMLObjectElement>::FirstAncestor(*n);
if (n)
return DynamicTo<LayoutEmbeddedContent>(n->GetLayoutObject());
return nullptr;
}
LayoutEmbeddedContent* HTMLEmbedElement::ExistingLayoutEmbeddedContent() const {
return FindPartLayoutObject(this);
}
bool HTMLEmbedElement::IsPresentationAttribute(
const QualifiedName& name) const {
if (name == html_names::kHiddenAttr)
return true;
return HTMLPlugInElement::IsPresentationAttribute(name);
}
void HTMLEmbedElement::CollectStyleForPresentationAttribute(
const QualifiedName& name,
const AtomicString& value,
MutableCSSPropertyValueSet* style) {
if (name == html_names::kHiddenAttr) {
if (EqualIgnoringASCIICase(value, "yes") ||
EqualIgnoringASCIICase(value, "true")) {
AddPropertyToPresentationAttributeStyle(
style, CSSPropertyID::kWidth, 0,
CSSPrimitiveValue::UnitType::kPixels);
AddPropertyToPresentationAttributeStyle(
style, CSSPropertyID::kHeight, 0,
CSSPrimitiveValue::UnitType::kPixels);
}
} else {
HTMLPlugInElement::CollectStyleForPresentationAttribute(name, value, style);
}
}
void HTMLEmbedElement::ParseAttribute(
const AttributeModificationParams& params) {
if (params.name == html_names::kTypeAttr) {
SetServiceType(params.new_value.LowerASCII());
wtf_size_t pos = service_type_.Find(";");
if (pos != kNotFound)
SetServiceType(service_type_.Left(pos));
if (GetLayoutObject()) {
SetNeedsPluginUpdate(true);
SetDisposeView();
GetLayoutObject()->SetNeedsLayoutAndFullPaintInvalidation(
"Embed type changed");
}
} else if (params.name == html_names::kCodeAttr) {
// TODO(schenney): Remove this branch? It's not in the spec and we're not in
// the HTMLAppletElement hierarchy.
SetUrl(StripLeadingAndTrailingHTMLSpaces(params.new_value));
SetDisposeView();
} else if (params.name == html_names::kSrcAttr) {
SetUrl(StripLeadingAndTrailingHTMLSpaces(params.new_value));
if (GetLayoutObject() && IsImageType()) {
SetDisposeView();
if (!image_loader_)
image_loader_ = MakeGarbageCollected<HTMLImageLoader>(this);
image_loader_->UpdateFromElement(ImageLoader::kUpdateIgnorePreviousError);
} else if (GetLayoutObject()) {
// Check if this Embed can transition from potentially-active to active
if (FastHasAttribute(html_names::kTypeAttr)) {
SetNeedsPluginUpdate(true);
ReattachOnPluginChangeIfNeeded();
} else {
UseCounter::Count(GetDocument(),
WebFeature::kEmbedElementWithoutTypeSrcChanged);
}
}
} else {
HTMLPlugInElement::ParseAttribute(params);
}
}
void HTMLEmbedElement::ParametersForPlugin(PluginParameters& plugin_params) {
AttributeCollection attributes = Attributes();
for (const Attribute& attribute : attributes)
plugin_params.AppendAttribute(attribute);
}
// FIXME: This should be unified with HTMLObjectElement::UpdatePlugin and
// moved down into html_plugin_element.cc
void HTMLEmbedElement::UpdatePluginInternal() {
DCHECK(!GetLayoutEmbeddedObject()->ShowsUnavailablePluginIndicator());
DCHECK(NeedsPluginUpdate());
SetNeedsPluginUpdate(false);
if (url_.IsEmpty() && service_type_.IsEmpty())
return;
// Note these pass url_ and service_type_ to allow better code sharing with
// <object> which modifies url and serviceType before calling these.
if (!AllowedToLoadFrameURL(url_))
return;
PluginParameters plugin_params;
ParametersForPlugin(plugin_params);
// FIXME: Can we not have GetLayoutObject() here now that beforeload events
// are gone?
if (!GetLayoutObject())
return;
// Overwrites the URL and MIME type of a Flash embed to use an HTML5 embed.
KURL overriden_url =
GetDocument().GetFrame()->Client()->OverrideFlashEmbedWithHTML(
GetDocument().CompleteURL(url_));
if (!overriden_url.IsEmpty()) {
url_ = overriden_url.GetString();
SetServiceType("text/html");
}
RequestObject(plugin_params);
}
bool HTMLEmbedElement::LayoutObjectIsNeeded(const ComputedStyle& style) const {
if (IsImageType())
return HTMLPlugInElement::LayoutObjectIsNeeded(style);
// https://html.spec.whatwg.org/C/#the-embed-element
// While any of the following conditions are occurring, any plugin
// instantiated for the element must be removed, and the embed element
// represents nothing:
// * The element has neither a src attribute nor a type attribute.
if (!FastHasAttribute(html_names::kSrcAttr) &&
!FastHasAttribute(html_names::kTypeAttr))
return false;
// * The element has a media element ancestor.
// -> It's realized by LayoutMedia::isChildAllowed.
// * The element has an ancestor object element that is not showing its
// fallback content.
ContainerNode* p = parentNode();
if (auto* object = DynamicTo<HTMLObjectElement>(p)) {
if (!object->WillUseFallbackContentAtLayout() &&
!object->UseFallbackContent()) {
return false;
}
}
return HTMLPlugInElement::LayoutObjectIsNeeded(style);
}
bool HTMLEmbedElement::IsURLAttribute(const Attribute& attribute) const {
return attribute.GetName() == html_names::kSrcAttr ||
HTMLPlugInElement::IsURLAttribute(attribute);
}
const QualifiedName& HTMLEmbedElement::SubResourceAttributeName() const {
return html_names::kSrcAttr;
}
bool HTMLEmbedElement::IsInteractiveContent() const {
return true;
}
bool HTMLEmbedElement::IsExposed() const {
// http://www.whatwg.org/specs/web-apps/current-work/#exposed
for (HTMLObjectElement* object =
Traversal<HTMLObjectElement>::FirstAncestor(*this);
object; object = Traversal<HTMLObjectElement>::FirstAncestor(*object)) {
if (object->IsExposed())
return false;
}
return true;
}
} // namespace blink
|
