1 /*
2 * Copyright (C) 2009 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 * * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "config.h"
32 #include "ScriptEventListener.h"
33
34 #include "Attribute.h"
35 #include "Document.h"
36 #include "JSNode.h"
37 #include "Frame.h"
38 #include "XSSAuditor.h"
39
40 #include <runtime/JSLock.h>
41
42 using namespace JSC;
43
44 namespace WebCore {
45
eventParameterName(bool isSVGEvent)46 static const String& eventParameterName(bool isSVGEvent)
47 {
48 DEFINE_STATIC_LOCAL(const String, eventString, ("event"));
49 DEFINE_STATIC_LOCAL(const String, evtString, ("evt"));
50 return isSVGEvent ? evtString : eventString;
51 }
52
createAttributeEventListener(Node * node,Attribute * attr)53 PassRefPtr<JSLazyEventListener> createAttributeEventListener(Node* node, Attribute* attr)
54 {
55 ASSERT(node);
56
57 Frame* frame = node->document()->frame();
58 if (!frame)
59 return 0;
60
61 ScriptController* scriptController = frame->script();
62 if (!scriptController->isEnabled())
63 return 0;
64
65 if (!scriptController->xssAuditor()->canCreateInlineEventListener(attr->localName().string(), attr->value())) {
66 // This script is not safe to execute.
67 return 0;
68 }
69
70 JSDOMWindow* globalObject = scriptController->globalObject();
71
72 // Ensure that 'node' has a JavaScript wrapper to mark the event listener we're creating.
73 {
74 JSLock lock(SilenceAssertionsOnly);
75 // FIXME: Should pass the global object associated with the node
76 toJS(globalObject->globalExec(), globalObject, node);
77 }
78
79 return JSLazyEventListener::create(attr->localName().string(), eventParameterName(node->isSVGElement()), attr->value(), globalObject, node, scriptController->eventHandlerLineNumber());
80 }
81
createAttributeEventListener(Frame * frame,Attribute * attr)82 PassRefPtr<JSLazyEventListener> createAttributeEventListener(Frame* frame, Attribute* attr)
83 {
84 if (!frame)
85 return 0;
86
87 ScriptController* scriptController = frame->script();
88 if (!scriptController->isEnabled())
89 return 0;
90
91 if (!scriptController->xssAuditor()->canCreateInlineEventListener(attr->localName().string(), attr->value())) {
92 // This script is not safe to execute.
93 return 0;
94 }
95
96 // 'globalObject' is the JavaScript wrapper that will mark the event listener we're creating.
97 JSDOMWindow* globalObject = scriptController->globalObject();
98
99 return JSLazyEventListener::create(attr->localName().string(), eventParameterName(frame->document()->isSVGDocument()), attr->value(), globalObject, 0, scriptController->eventHandlerLineNumber());
100 }
101
102 } // namespace WebCore
103