1/*
2    Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
3
4    This library is free software; you can redistribute it and/or
5    modify it under the terms of the GNU Library General Public
6    License as published by the Free Software Foundation; either
7    version 2 of the License, or (at your option) any later version.
8
9    This library is distributed in the hope that it will be useful,
10    but WITHOUT ANY WARRANTY; without even the implied warranty of
11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12    Library General Public License for more details.
13
14    You should have received a copy of the GNU Library General Public License
15    along with this library; see the file COPYING.LIB.  If not, write to
16    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17    Boston, MA 02110-1301, USA.
18*/
19
20// Contains the necessary helper structures to make possible expose
21// C/C++ functions to JavaScript environment.
22
23#include "config.h"
24
25#include "qscriptfunction_p.h"
26
27static void qt_NativeFunction_finalize(JSObjectRef object)
28{
29    void* priv = JSObjectGetPrivate(object);
30    delete reinterpret_cast<QNativeFunctionData*>(priv);
31}
32
33static JSValueRef qt_NativeFunction_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef thisObject, size_t argumentCount, const JSValueRef arguments[], JSValueRef* exception)
34{
35    QNativeFunctionData* data = reinterpret_cast<QNativeFunctionData*>(JSObjectGetPrivate(object));
36
37    // TODO: build a QScriptContext and use it in the native call.
38    QScriptContext* scriptContext = 0;
39    Q_UNUSED(context);
40    Q_UNUSED(thisObject);
41    Q_UNUSED(argumentCount);
42    Q_UNUSED(arguments);
43    Q_UNUSED(exception);
44
45    QScriptEnginePrivate* engine = data->engine;
46    QScriptValuePrivate* result = QScriptValuePrivate::get(data->fun(scriptContext, QScriptEnginePrivate::get(engine)));
47    if (!result->isValid()) {
48        qWarning("Invalid value returned from native function, returning undefined value instead.");
49        return engine->makeJSValue(QScriptValue::UndefinedValue);
50    }
51
52    // Make sure that the result will be assigned to the correct engine.
53    if (!result->engine()) {
54        Q_ASSERT(result->isValid());
55        result->assignEngine(engine);
56    } else if (result->engine() != engine) {
57        qWarning("Value from different engine returned from native function, returning undefined value instead.");
58        return engine->makeJSValue(QScriptValue::UndefinedValue);
59    }
60
61    return *result;
62}
63
64JSClassDefinition qt_NativeFunctionClass = {
65    0,                                     // version
66    kJSClassAttributeNoAutomaticPrototype, // attributes
67
68    "",                         // className
69    0,                          // parentClass
70
71    0,                          // staticValues
72    0,                          // staticFunctions
73
74    0,                                // initialize
75    qt_NativeFunction_finalize,       // finalize
76    0,                                // hasProperty
77    0,                                // getProperty
78    0,                                // setProperty
79    0,                                // deleteProperty
80    0,                                // getPropertyNames
81    qt_NativeFunction_callAsFunction, // callAsFunction
82    0,                                // callAsConstructor
83    0,                                // hasInstance
84    0                                 // convertToType
85};
86
87static void qt_NativeFunctionWithArg_finalize(JSObjectRef object)
88{
89    void* priv = JSObjectGetPrivate(object);
90    delete reinterpret_cast<QNativeFunctionWithArgData*>(priv);
91}
92
93static JSValueRef qt_NativeFunctionWithArg_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef thisObject, size_t argumentCount, const JSValueRef arguments[], JSValueRef* exception)
94{
95    QNativeFunctionWithArgData* data = reinterpret_cast<QNativeFunctionWithArgData*>(JSObjectGetPrivate(object));
96
97    // TODO: build a QScriptContext and use it in the native call.
98    QScriptContext* scriptContext = 0;
99    Q_UNUSED(context);
100    Q_UNUSED(thisObject);
101    Q_UNUSED(argumentCount);
102    Q_UNUSED(arguments);
103    Q_UNUSED(exception);
104
105    QScriptEnginePrivate* engine = data->engine;
106    QScriptValuePrivate* result = QScriptValuePrivate::get(data->fun(scriptContext, QScriptEnginePrivate::get(engine), data->arg));
107    if (!result->isValid()) {
108        qWarning("Invalid value returned from native function, returning undefined value instead.");
109        return engine->makeJSValue(QScriptValue::UndefinedValue);
110    }
111
112    // Make sure that the result will be assigned to the correct engine.
113    if (!result->engine()) {
114        Q_ASSERT(result->isValid());
115        result->assignEngine(engine);
116    } else if (result->engine() != engine) {
117        qWarning("Value from different engine returned from native function, returning undefined value instead.");
118        return engine->makeJSValue(QScriptValue::UndefinedValue);
119    }
120
121    return *result;
122}
123
124JSClassDefinition qt_NativeFunctionWithArgClass = {
125    0,                                     // version
126    kJSClassAttributeNoAutomaticPrototype, // attributes
127
128    "",                         // className
129    0,                          // parentClass
130
131    0,                          // staticValues
132    0,                          // staticFunctions
133
134    0,                                       // initialize
135    qt_NativeFunctionWithArg_finalize,       // finalize
136    0,                                       // hasProperty
137    0,                                       // getProperty
138    0,                                       // setProperty
139    0,                                       // deleteProperty
140    0,                                       // getPropertyNames
141    qt_NativeFunctionWithArg_callAsFunction, // callAsFunction
142    0,                                       // callAsConstructor
143    0,                                       // hasInstance
144    0                                        // convertToType
145};
146