summaryrefslogtreecommitdiffstats
path: root/src/script/bridge/qscriptclassobject.cpp
blob: b85fa5e8ff2f8a7516ff525807fa12bb19dbb206 (plain)
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
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtScript module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights.  These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "config.h"
#include "qscriptclassobject_p.h"

#include "../api/qscriptengine.h"
#include "../api/qscriptengine_p.h"
#include "../api/qscriptcontext.h"
#include "../api/qscriptcontext_p.h"
#include "../api/qscriptclass.h"
#include "../api/qscriptclasspropertyiterator.h"

#include "Error.h"
#include "PropertyNameArray.h"

Q_DECLARE_METATYPE(QScriptContext*)
Q_DECLARE_METATYPE(QScriptValue)
Q_DECLARE_METATYPE(QScriptValueList)

QT_BEGIN_NAMESPACE

namespace QScript
{

ClassObjectDelegate::ClassObjectDelegate(QScriptClass *scriptClass)
    : m_scriptClass(scriptClass)
{
}

ClassObjectDelegate::~ClassObjectDelegate()
{
}

QScriptClass *ClassObjectDelegate::scriptClass() const
{
    return m_scriptClass;
}

void ClassObjectDelegate::setScriptClass(QScriptClass *scriptClass)
{
    m_scriptClass = scriptClass;
}

QScriptObjectDelegate::Type ClassObjectDelegate::type() const
{
    return ClassObject;
}

bool ClassObjectDelegate::getOwnPropertySlot(QScriptObject* object,
                                             JSC::ExecState *exec,
                                             const JSC::Identifier &propertyName,
                                             JSC::PropertySlot &slot)
{
    // for compatibility with the old back-end, normal JS properties
    // are queried first.
    if (QScriptObjectDelegate::getOwnPropertySlot(object, exec, propertyName, slot))
        return true;

    QScriptEnginePrivate *engine = scriptEngineFromExec(exec);
    QScriptValue scriptObject = engine->scriptValueFromJSCValue(object);
    QScriptString scriptName;
    QScriptStringPrivate scriptName_d(engine, propertyName, QScriptStringPrivate::StackAllocated);
    QScriptStringPrivate::init(scriptName, &scriptName_d);
    uint id = 0;
    QScriptClass::QueryFlags flags = m_scriptClass->queryProperty(
        scriptObject, scriptName, QScriptClass::HandlesReadAccess, &id);
    if (flags & QScriptClass::HandlesReadAccess) {
        QScriptValue value = m_scriptClass->property(scriptObject, scriptName, id);
        slot.setValue(engine->scriptValueToJSCValue(value));
        return true;
    }
    return false;
}

void ClassObjectDelegate::put(QScriptObject* object, JSC::ExecState *exec,
                              const JSC::Identifier &propertyName,
                              JSC::JSValue value, JSC::PutPropertySlot &slot)
{
    QScriptEnginePrivate *engine = scriptEngineFromExec(exec);
    QScriptValue scriptObject = engine->scriptValueFromJSCValue(object);
    QScriptString scriptName;
    QScriptStringPrivate scriptName_d(engine, propertyName, QScriptStringPrivate::StackAllocated);
    QScriptStringPrivate::init(scriptName, &scriptName_d);
    uint id = 0;
    QScriptClass::QueryFlags flags = m_scriptClass->queryProperty(
        scriptObject, scriptName, QScriptClass::HandlesWriteAccess, &id);
    if (flags & QScriptClass::HandlesWriteAccess) {
        m_scriptClass->setProperty(scriptObject, scriptName, id, engine->scriptValueFromJSCValue(value));
        return;
    }
    QScriptObjectDelegate::put(object, exec, propertyName, value, slot);
}

bool ClassObjectDelegate::deleteProperty(QScriptObject* object, JSC::ExecState *exec,
                                         const JSC::Identifier &propertyName,
                                         bool checkDontDelete)
{
    // ### avoid duplication of put()
    QScriptEnginePrivate *engine = scriptEngineFromExec(exec);
    QScriptValue scriptObject = engine->scriptValueFromJSCValue(object);
    QScriptString scriptName;
    QScriptStringPrivate scriptName_d(engine, propertyName, QScriptStringPrivate::StackAllocated);
    QScriptStringPrivate::init(scriptName, &scriptName_d);
    uint id = 0;
    QScriptClass::QueryFlags flags = m_scriptClass->queryProperty(
        scriptObject, scriptName, QScriptClass::HandlesWriteAccess, &id);
    if (flags & QScriptClass::HandlesWriteAccess) {
        if (m_scriptClass->propertyFlags(scriptObject, scriptName, id) & QScriptValue::Undeletable)
            return false;
        m_scriptClass->setProperty(scriptObject, scriptName, id, QScriptValue());
        return true;
    }
    return QScriptObjectDelegate::deleteProperty(object, exec, propertyName, checkDontDelete);
}

bool ClassObjectDelegate::getPropertyAttributes(const QScriptObject* object, JSC::ExecState *exec,
                                                const JSC::Identifier &propertyName,
                                                unsigned &attribs) const
{
    QScriptEnginePrivate *engine = scriptEngineFromExec(exec);
    QScriptValue scriptObject = engine->scriptValueFromJSCValue(object);
    QScriptString scriptName;
    QScriptStringPrivate scriptName_d(engine, propertyName, QScriptStringPrivate::StackAllocated);
    QScriptStringPrivate::init(scriptName, &scriptName_d);
    uint id = 0;
    QScriptClass::QueryFlags flags = m_scriptClass->queryProperty(
        scriptObject, scriptName, QScriptClass::HandlesReadAccess, &id);
    if (flags & QScriptClass::HandlesReadAccess) {
        QScriptValue::PropertyFlags flags = m_scriptClass->propertyFlags(scriptObject, scriptName, id);
        attribs = 0;
        if (flags & QScriptValue::ReadOnly)
            attribs |= JSC::ReadOnly;
        if (flags & QScriptValue::SkipInEnumeration)
            attribs |= JSC::DontEnum;
        if (flags & QScriptValue::Undeletable)
            attribs |= JSC::DontDelete;
        if (flags & QScriptValue::PropertyGetter)
            attribs |= JSC::Getter;
        if (flags & QScriptValue::PropertySetter)
            attribs |= JSC::Setter;
        attribs |= flags & QScriptValue::UserRange;
        return true;
    }
    return QScriptObjectDelegate::getPropertyAttributes(object, exec, propertyName, attribs);
}

void ClassObjectDelegate::getPropertyNames(QScriptObject* object, JSC::ExecState *exec,
                                           JSC::PropertyNameArray &propertyNames,
                                           unsigned listedAttributes)
{
    QScriptEnginePrivate *engine = scriptEngineFromExec(exec);
    QScriptValue scriptObject = engine->scriptValueFromJSCValue(object);
    QScriptClassPropertyIterator *it = m_scriptClass->newIterator(scriptObject);
    if (it != 0) {
        while (it->hasNext()) {
            it->next();
            QString name = it->name().toString();
            propertyNames.add(JSC::Identifier(exec, name));
        }
        delete it;
    }
    QScriptObjectDelegate::getPropertyNames(object, exec, propertyNames, listedAttributes);
}

JSC::CallType ClassObjectDelegate::getCallData(QScriptObject*, JSC::CallData &callData)
{
    if (!m_scriptClass->supportsExtension(QScriptClass::Callable))
        return JSC::CallTypeNone;
    callData.native.function = call;
    return JSC::CallTypeHost;
}

JSC::JSValue JSC_HOST_CALL ClassObjectDelegate::call(JSC::ExecState *exec, JSC::JSObject *callee,
                                             JSC::JSValue thisValue, const JSC::ArgList &args)
{
    if (!callee->isObject(&QScriptObject::info))
        return JSC::throwError(exec, JSC::TypeError, "callee is not a ClassObject object");
    QScriptObject *obj = static_cast<QScriptObject*>(callee);
    QScriptObjectDelegate *delegate = obj->delegate();
    if (!delegate || (delegate->type() != QScriptObjectDelegate::ClassObject))
        return JSC::throwError(exec, JSC::TypeError, "callee is not a ClassObject object");

    QScriptClass *scriptClass = static_cast<ClassObjectDelegate*>(delegate)->scriptClass();
    QScriptEnginePrivate *eng_p = scriptEngineFromExec(exec);

    JSC::ExecState *oldFrame = eng_p->currentFrame;
    eng_p->pushContext(exec, thisValue, args, callee);
    QScriptContext *ctx = eng_p->contextForFrame(eng_p->currentFrame);
    QScriptValue scriptObject = eng_p->scriptValueFromJSCValue(obj);
    QVariant result = scriptClass->extension(QScriptClass::Callable, qVariantFromValue(ctx));
    eng_p->popContext();
    eng_p->currentFrame = oldFrame;
    return eng_p->jscValueFromVariant(result);
}

JSC::ConstructType ClassObjectDelegate::getConstructData(QScriptObject*, JSC::ConstructData &constructData)
{
    if (!m_scriptClass->supportsExtension(QScriptClass::Callable))
        return JSC::ConstructTypeNone;
    constructData.native.function = construct;
    return JSC::ConstructTypeHost;
}

JSC::JSObject* ClassObjectDelegate::construct(JSC::ExecState *exec, JSC::JSObject *callee,
                                              const JSC::ArgList &args)
{
    Q_ASSERT(callee->isObject(&QScriptObject::info));
    QScriptObject *obj = static_cast<QScriptObject*>(callee);
    QScriptObjectDelegate *delegate = obj->delegate();
    QScriptClass *scriptClass = static_cast<ClassObjectDelegate*>(delegate)->scriptClass();

    QScriptEnginePrivate *eng_p = scriptEngineFromExec(exec);
    //JSC::ExecState *oldFrame = eng_p->currentFrame;
    eng_p->pushContext(exec, JSC::JSValue(), args, callee, true);
    QScriptContext *ctx = eng_p->contextForFrame(eng_p->currentFrame);

    QScriptValue defaultObject = ctx->thisObject();
    QScriptValue result = qvariant_cast<QScriptValue>(scriptClass->extension(QScriptClass::Callable, qVariantFromValue(ctx)));
    if (!result.isObject())
        result = defaultObject;
    return JSC::asObject(eng_p->scriptValueToJSCValue(result));
}

bool ClassObjectDelegate::hasInstance(QScriptObject* object, JSC::ExecState *exec,
                                      JSC::JSValue value, JSC::JSValue proto)
{
    if (!scriptClass()->supportsExtension(QScriptClass::HasInstance))
        return QScriptObjectDelegate::hasInstance(object, exec, value, proto);
    QScriptValueList args;
    QScriptEnginePrivate *eng_p = scriptEngineFromExec(exec);
    args << eng_p->scriptValueFromJSCValue(object) << eng_p->scriptValueFromJSCValue(value);
    QVariant result = scriptClass()->extension(QScriptClass::HasInstance, qVariantFromValue(args));
    return result.toBool();
}

} // namespace QScript

QT_END_NAMESPACE