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
|
// -*- c++ -*-
/*
* Copyright (C) 2001-2004, Richard J. Moore <[email protected]>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef KJSEMBEDJSPROXY_H
#define KJSEMBEDJSPROXY_H
#include <kjs/object.h>
#include "global.h"
namespace KJSEmbed {
class JSObjectProxy;
class JSValueProxy;
class JSOpaqueProxy;
/**
* Base class for all proxy objects.
*
* @version $Id$
* @author Richard Moore, [email protected]
*/
class KJSEMBED_EXPORT JSProxy : public KJS::ObjectImp
{
public:
/** Identifiers for the various types of proxy. */
enum ProxyType {
UnknownProxy,
ObjectProxy,
ValueProxy,
OpaqueProxy,
BuiltinProxy
};
/** Identifies the owner of the currently wrapped pointer */
enum Owner { Native, /** This is a C++ pointer and it will not be deleted by the garbage collector */
JavaScript /** This pointer is owned by Javascript and it will be deleted by the garbage collector */
};
/**
* Structure to store information about a method.
*/
struct MethodTable {
int id;
const char *name;
};
/**
* Adds a @ref MethodTable of methods to an object.
* Note: The method table MUST end in a {0,0} entry.
*/
template< class T >
static void addMethods( KJS::ExecState *exec, MethodTable *table, KJS::Object &object )
{
int idx = 0;
if( !table[idx].name ) return; // check for empty list
do {
T *meth = new T( exec, table[idx].id );
object.put( exec , table[idx].name, KJS::Object(meth), KJS::Function );
++idx;
} while( table[idx].name );
}
/**
* Structure to store information about enums.
*/
struct EnumTable {
const char *id;
int val;
};
/**
* Adds a @ref EnumTable of static values to an object.
* Note: The method table MUST end in a {0,0} entry.
*/
static void addEnums( KJS::ExecState *exec, EnumTable *table, KJS::Object &object );
/**
* Checks to see if an object is a desired type.
* @param object - the object you want to test.
* @param prxyType - the type of prxy you want.
* @param classname - the name of the class you want.
* @returns if the two above conditions are met.
*/
static bool checkType( const KJS::Object &object, ProxyType prxyType, const TQString &classname);
JSProxy( int type );
virtual ~JSProxy();
/** Returns the string value of the class name **/
virtual TQString typeName() const = 0;
/** Returns true iff the content of this proxy inherits the specified base-class. */
virtual bool inherits( const char *clazz ) = 0;
/** Returns the type of the proxy. */
int proxyType() const { return proxytype; }
/** Returns true iff this is a JSObjectProxy. */
bool isObjectProxy() const { return proxytype == ObjectProxy; }
/** Returns true iff this is a JSValueProxy. */
bool isValueProxy() const { return proxytype == ValueProxy; }
/** Returns true iff this is a JSOpaqueProxy. */
bool isOpaqueProxy() const { return proxytype == OpaqueProxy; }
/** Returns this object as a JSObjectProxy or 0 if the type is wrong. */
JSObjectProxy *toObjectProxy();
/** Returns this object as a JSValueProxy or 0 if the type is wrong. */
JSValueProxy *toValueProxy();
/** Returns this object as a JSOpaqueProxy or 0 if the type is wrong. */
JSOpaqueProxy *toOpaqueProxy();
/**
* Converts the specified ValueImp to a JSProxy if possible, if the
* ValueImp is not a JSProxy then 0 is returned.
*/
static JSProxy *toProxy( KJS::ValueImp *imp );
/**
* Converts the specified ValueImp to a JSObjectProxy if possible, if the
* ValueImp is not a JSObjectProxy then 0 is returned.
*/
static JSObjectProxy *toObjectProxy( KJS::ValueImp *imp );
/**
* Converts the specified ValueImp to a JSValueProxy if possible, if the
* ValueImp is not a JSValueProxy then 0 is returned.
*/
static JSValueProxy *toValueProxy( KJS::ValueImp *imp );
/**
* Converts the specified ValueImp to a JSOpaqueProxy if possible, if the
* ValueImp is not a JSOpaqueProxy then 0 is returned.
*/
static JSOpaqueProxy *toOpaqueProxy( KJS::ValueImp *imp );
/**
* Transfers ownership of the contained pointer to C++ or Javascript.
* JavaScript - Javascript GC will delete the pointer
* Native - Javascript will not delete the pointer, but just the proxy.
*/
void setOwner( Owner state = Native );
/**
* Returns the current ownership.
*/
Owner owner() const;
protected:
/**
* Who really owns the current pointer
*/
Owner ownership;
private:
int proxytype;
class JSProxyPrivate *d;
};
} // namespace KJSEmbed
#endif // KJSEMBEDJSPROXYIMP_H
// Local Variables:
// c-basic-offset: 4
// End:
|
