1/*
2 * Copyright (C) 2008 Apple 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
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "JSJavaScriptCallFrame.h"
28
29#if ENABLE(JAVASCRIPT_DEBUGGER)
30
31#include "JavaScriptCallFrame.h"
32#include <runtime/ArrayPrototype.h>
33#include <runtime/Error.h>
34
35using namespace JSC;
36
37namespace WebCore {
38
39JSValue JSJavaScriptCallFrame::evaluate(ExecState* exec)
40{
41    JSValue exception;
42    JSValue result = impl()->evaluate(exec->argument(0).toString(exec), exception);
43
44    if (exception)
45        throwError(exec, exception);
46
47    return result;
48}
49
50JSValue JSJavaScriptCallFrame::thisObject(ExecState*) const
51{
52    return impl()->thisObject() ? JSValue(impl()->thisObject()) : jsNull();
53}
54
55JSValue JSJavaScriptCallFrame::type(ExecState* exec) const
56{
57    switch (impl()->type()) {
58        case DebuggerCallFrame::FunctionType:
59            return jsString(exec, UString("function"));
60        case DebuggerCallFrame::ProgramType:
61            return jsString(exec, UString("program"));
62    }
63
64    ASSERT_NOT_REACHED();
65    return jsNull();
66}
67
68JSValue JSJavaScriptCallFrame::scopeChain(ExecState* exec) const
69{
70    if (!impl()->scopeChain())
71        return jsNull();
72
73    ScopeChainNode* scopeChain = impl()->scopeChain();
74    ScopeChainIterator iter = scopeChain->begin();
75    ScopeChainIterator end = scopeChain->end();
76
77    // we must always have something in the scope chain
78    ASSERT(iter != end);
79
80    MarkedArgumentBuffer list;
81    do {
82        list.append(iter->get());
83        ++iter;
84    } while (iter != end);
85
86    return constructArray(exec, list);
87}
88
89JSValue JSJavaScriptCallFrame::scopeType(ExecState* exec)
90{
91    if (!impl()->scopeChain())
92        return jsUndefined();
93
94    if (!exec->argument(0).isInt32())
95        return jsUndefined();
96    int index = exec->argument(0).asInt32();
97
98    ScopeChainNode* scopeChain = impl()->scopeChain();
99    ScopeChainIterator end = scopeChain->end();
100
101    bool foundLocalScope = false;
102    for (ScopeChainIterator iter = scopeChain->begin(); iter != end; ++iter) {
103        JSObject* scope = iter->get();
104        if (scope->isActivationObject()) {
105            if (!foundLocalScope) {
106                // First activation object is local scope, each successive activation object is closure.
107                if (!index)
108                    return jsJavaScriptCallFrameLOCAL_SCOPE(exec, JSValue(), Identifier());
109                foundLocalScope = true;
110            } else if (!index)
111                return jsJavaScriptCallFrameCLOSURE_SCOPE(exec, JSValue(), Identifier());
112        }
113
114        if (!index) {
115            // Last in the chain is global scope.
116            if (++iter == end)
117                return jsJavaScriptCallFrameGLOBAL_SCOPE(exec, JSValue(), Identifier());
118            return jsJavaScriptCallFrameWITH_SCOPE(exec, JSValue(), Identifier());
119        }
120
121        --index;
122    }
123    return jsUndefined();
124}
125
126} // namespace WebCore
127
128#endif // ENABLE(JAVASCRIPT_DEBUGGER)
129