1/*
2 * Copyright (C) 2010 Google Inc. All rights reserved.
3 * Copyright (C) 2013 Apple Inc. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met:
8 *
9 *     * Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *     * Redistributions in binary form must reproduce the above
12 * copyright notice, this list of conditions and the following disclaimer
13 * in the documentation and/or other materials provided with the
14 * distribution.
15 *     * Neither the name of Google Inc. nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include "config.h"
33
34#include "JSErrorHandler.h"
35
36#include "Document.h"
37#include "ErrorEvent.h"
38#include "Event.h"
39#include "EventNames.h"
40#include "JSEvent.h"
41#include "JSMainThreadExecState.h"
42#include <runtime/JSLock.h>
43#include <runtime/VMEntryScope.h>
44#include <wtf/Ref.h>
45
46using namespace JSC;
47
48namespace WebCore {
49
50JSErrorHandler::JSErrorHandler(JSObject* function, JSObject* wrapper, bool isAttribute, DOMWrapperWorld& world)
51    : JSEventListener(function, wrapper, isAttribute, world)
52{
53}
54
55JSErrorHandler::~JSErrorHandler()
56{
57}
58
59void JSErrorHandler::handleEvent(ScriptExecutionContext* scriptExecutionContext, Event* event)
60{
61
62    if (event->eventInterface() != ErrorEventInterfaceType)
63        return JSEventListener::handleEvent(scriptExecutionContext, event);
64
65    ASSERT(scriptExecutionContext);
66    if (!scriptExecutionContext)
67        return;
68
69    ErrorEvent* errorEvent = toErrorEvent(event);
70
71    JSLockHolder lock(scriptExecutionContext->vm());
72
73    JSObject* jsFunction = this->jsFunction(scriptExecutionContext);
74    if (!jsFunction)
75        return;
76
77    JSDOMGlobalObject* globalObject = toJSDOMGlobalObject(scriptExecutionContext, isolatedWorld());
78    if (!globalObject)
79        return;
80
81    ExecState* exec = globalObject->globalExec();
82
83    CallData callData;
84    CallType callType = jsFunction->methodTable()->getCallData(jsFunction, callData);
85
86    if (callType != CallTypeNone) {
87        Ref<JSErrorHandler> protectedctor(*this);
88
89        Event* savedEvent = globalObject->currentEvent();
90        globalObject->setCurrentEvent(event);
91
92        MarkedArgumentBuffer args;
93        args.append(jsStringWithCache(exec, errorEvent->message()));
94        args.append(jsStringWithCache(exec, errorEvent->filename()));
95        args.append(jsNumber(errorEvent->lineno()));
96        args.append(jsNumber(errorEvent->colno()));
97
98        VM& vm = globalObject->vm();
99        VMEntryScope entryScope(vm, vm.entryScope ? vm.entryScope->globalObject() : globalObject);
100
101        JSValue exception;
102        JSValue returnValue = scriptExecutionContext->isDocument()
103            ? JSMainThreadExecState::call(exec, jsFunction, callType, callData, globalObject, args, &exception)
104            : JSC::call(exec, jsFunction, callType, callData, globalObject, args, &exception);
105
106        globalObject->setCurrentEvent(savedEvent);
107
108        if (exception)
109            reportException(exec, exception);
110        else {
111            if (returnValue.isTrue())
112                event->preventDefault();
113        }
114    }
115}
116
117} // namespace WebCore
118