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 "EventListener.h"
37#include "JSNode.h"
38#include "Frame.h"
39#include <runtime/JSLock.h>
40
41using namespace JSC;
42
43namespace WebCore {
44
45static const String& eventParameterName(bool isSVGEvent)
46{
47    DEFINE_STATIC_LOCAL(const String, eventString, ("event"));
48    DEFINE_STATIC_LOCAL(const String, evtString, ("evt"));
49    return isSVGEvent ? evtString : eventString;
50}
51
52PassRefPtr<JSLazyEventListener> createAttributeEventListener(Node* node, Attribute* attr)
53{
54    ASSERT(node);
55    ASSERT(attr);
56    if (attr->isNull())
57        return 0;
58
59    int lineNumber = 1;
60    String sourceURL;
61
62    // FIXME: We should be able to provide accurate source information for frameless documents, too (e.g. for importing nodes from XMLHttpRequest.responseXML).
63    if (Frame* frame = node->document()->frame()) {
64        ScriptController* scriptController = frame->script();
65        if (!scriptController->canExecuteScripts(AboutToExecuteScript))
66            return 0;
67
68        lineNumber = scriptController->eventHandlerLineNumber();
69        sourceURL = node->document()->url().string();
70    }
71
72    return JSLazyEventListener::create(attr->localName().string(), eventParameterName(node->isSVGElement()), attr->value(), node, sourceURL, lineNumber, 0, mainThreadNormalWorld());
73}
74
75PassRefPtr<JSLazyEventListener> createAttributeEventListener(Frame* frame, Attribute* attr)
76{
77    if (!frame)
78        return 0;
79
80    ASSERT(attr);
81    if (attr->isNull())
82        return 0;
83
84    int lineNumber = 1;
85    String sourceURL;
86
87    ScriptController* scriptController = frame->script();
88    if (!scriptController->canExecuteScripts(AboutToExecuteScript))
89        return 0;
90
91    lineNumber = scriptController->eventHandlerLineNumber();
92    sourceURL = frame->document()->url().string();
93    JSObject* wrapper = toJSDOMWindow(frame, mainThreadNormalWorld());
94    return JSLazyEventListener::create(attr->localName().string(), eventParameterName(frame->document()->isSVGDocument()), attr->value(), 0, sourceURL, lineNumber, wrapper, mainThreadNormalWorld());
95}
96
97String eventListenerHandlerBody(Document* document, EventListener* eventListener)
98{
99    const JSEventListener* jsListener = JSEventListener::cast(eventListener);
100    if (!jsListener)
101        return "";
102    JSC::JSObject* jsFunction = jsListener->jsFunction(document);
103    if (!jsFunction)
104        return "";
105    return ustringToString(jsFunction->toString(scriptStateFromNode(jsListener->isolatedWorld(), document)));
106}
107
108bool eventListenerHandlerLocation(Document*, EventListener*, String&, int&)
109{
110    // FIXME: Add support for getting function location.
111    return false;
112}
113
114} // namespace WebCore
115