• Skip to content
  • Skip to link menu
KDE 4.2 API Reference
  • KDE API Reference
  • kdelibs
  • Sitemap
  • Contact Us
 

kjsembed

value_binding.h

Go to the documentation of this file.
00001 /* This file is part of the KDE libraries
00002     Copyright (C) 2005, 2006 Ian Reinhart Geiser <geiseri@kde.org>
00003     Copyright (C) 2005, 2006 Matt Broadstone <mbroadst@gmail.com>
00004     Copyright (C) 2005, 2006 Richard J. Moore <rich@kde.org>
00005     Copyright (C) 2005, 2006 Erik L. Bunce <kde@bunce.us>
00006 
00007     This library is free software; you can redistribute it and/or
00008     modify it under the terms of the GNU Library General Public
00009     License as published by the Free Software Foundation; either
00010     version 2 of the License, or (at your option) any later version.
00011 
00012     This library is distributed in the hope that it will be useful,
00013     but WITHOUT ANY WARRANTY; without even the implied warranty of
00014     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00015     Library General Public License for more details.
00016 
00017     You should have received a copy of the GNU Library General Public License
00018     along with this library; see the file COPYING.LIB.  If not, write to
00019     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00020     Boston, MA 02110-1301, USA.
00021 */
00022 
00023 
00024 #ifndef VALUE_BINDING_H
00025 #define VALUE_BINDING_H
00026 
00027 #include <kjs/object.h>
00028 #include <kjs/interpreter.h>
00029 
00030 #include "static_binding.h"
00031 #include "pointer.h"
00032 
00039 #define START_VALUE_METHOD( METHODNAME, TYPE) \
00040 KJS::JSValue *METHODNAME( KJS::ExecState *exec, KJS::JSObject *self, const KJS::List &args ) \
00041 { \
00042         Q_UNUSED(exec);\
00043         Q_UNUSED(self);\
00044         Q_UNUSED(args);\
00045         KJS::JSValue *result = KJS::jsNull(); \
00046         KJSEmbed::ValueBinding *imp = KJSEmbed::extractBindingImp<KJSEmbed::ValueBinding>(exec, self ); \
00047         if( imp ) \
00048         { \
00049                 TYPE value = imp->value<TYPE>();
00050 
00053 #define END_VALUE_METHOD \
00054                 imp->setValue(value); \
00055         } \
00056         else { \
00057             KJS::throwError(exec, KJS::GeneralError, "Problem in ValueBinding here");\
00058         }\
00059         return result; \
00060 }
00061 
00062 #define KJSO_VALUE_SIMPLE_BINDING_CTOR( NAME, JSNAME, TYPE, BASENAME )        \
00063     NAME::NAME(KJS::ExecState *exec, const char* typeName ) \
00064       : BASENAME( exec, typeName )                    \
00065     { \
00066       StaticBinding::publish( exec, this, NAME::methods() ); \
00067     } \
00068     NAME::NAME(KJS::ExecState *exec, const TYPE & value) \
00069       : BASENAME( exec, #JSNAME , value )                    \
00070     { \
00071       StaticBinding::publish( exec, this, NAME::methods() ); \
00072     }
00073 
00074 #define KJSO_VALUE_DERIVED_BINDING_CTOR( NAME, JSNAME, TYPE, BASENAME )  \
00075     NAME::NAME(KJS::ExecState *exec, const char* typeName ) \
00076       : BASENAME( exec, typeName )                    \
00077     { \
00078       StaticBinding::publish( exec, this, NAME::methods() ); \
00079     } \
00080     NAME::NAME(KJS::ExecState *exec, const TYPE & value)                \
00081     : BASENAME( exec, #JSNAME )                                         \
00082     {                                                                   \
00083         setValue(value);                                                \
00084         StaticBinding::publish( exec, this, NAME::methods() );          \
00085     }
00086 
00087 
00088 namespace KJSEmbed
00089 {
00093     class ValueFactory
00094     {
00095         public:
00096             static const Method ValueMethods[];
00097             static const Method *methods();
00098     };
00099 
00103     class ValueBinding : public ProxyBinding
00104     {
00105         public:
00106             template <typename T>
00107             ValueBinding( KJS::ExecState *exec, const char *typeName, T val )
00108                 : ProxyBinding( exec ),
00109                   m_name(typeName)
00110             {
00111                 m_value = new Value<T>(val);
00112                 StaticBinding::publish( exec, this, ValueFactory::methods() );
00113             }
00114             ValueBinding( KJS::ExecState *exec, const char *typeName);
00115             virtual ~ValueBinding();
00116 
00117             KJS::UString toString(KJS::ExecState *exec) const;
00118             KJS::UString className() const { return m_name; }
00119 
00123             template< typename T>
00124             T value() const
00125             {
00126                 const T *ptr = reinterpret_cast<const T*>(m_value->voidStar());
00127                 if( ptr )
00128                     return *ptr;
00129                 else
00130                     return T();
00131             }
00132 
00136             template< typename T>
00137             void setValue( const T &val )
00138             {
00139                 delete m_value;
00140                 m_value = new Value<T>(val);
00141             }
00142 
00143             template< typename T>
00144             static T castValue( ValueBinding *imp)
00145             {
00146                 const T *ptr = reinterpret_cast<const T*>( imp->m_value->voidStar() );
00147                 if( ptr )
00148                     return *ptr;
00149                 else
00150                     return T();
00151             }
00152             static const KJS::ClassInfo info;
00153 
00154         private:
00155             virtual const KJS::ClassInfo* classInfo() const { return &info; }
00156 
00157             PointerBase *m_value;
00158             const char *m_name;
00159 
00160     };
00161 
00166     template< typename T>
00167     T extractValue( KJS::ExecState *exec, KJS::JSValue *arg, const T &defaultValue )
00168     {
00169         if( arg )
00170         {
00171             KJSEmbed::ValueBinding *imp =
00172                     KJSEmbed::extractBindingImp<KJSEmbed::ValueBinding>(exec, arg );
00173             if( imp )
00174                 return ValueBinding::castValue<T>( imp );
00175         }
00176         return defaultValue;
00177     }
00178 
00183     template< typename T>
00184     T extractValue( KJS::ExecState *exec, const KJS::List &args, int idx, const T &defaultValue = T())
00185     {
00186         if( args.size() > idx )
00187         {
00188             return extractValue<T>( exec, args[idx], defaultValue );
00189         }
00190         else
00191             return defaultValue;
00192     }
00193 
00194     template< typename T>
00195     KJS::JSValue *createValue(KJS::ExecState *exec, const KJS::UString &className, const T &value)
00196     {
00197         KJS::JSObject *parent = exec->dynamicInterpreter()->globalObject();
00198         KJS::JSObject *returnValue = StaticConstructor::construct( exec, parent, className );
00199         if( returnValue )
00200         {
00201             // If its a value type setValue
00202             KJSEmbed::ValueBinding *imp =
00203                     extractBindingImp<KJSEmbed::ValueBinding>(exec, returnValue );
00204             if( imp )
00205                 imp->setValue( value );
00206             else
00207             {
00208                 KJS::throwError(exec, KJS::TypeError, toUString(QString("Created failed to cast to %1 failed").arg(toQString(className))));
00209                 return KJS::jsNull();
00210             }
00211         }
00212         else
00213         {
00214             KJS::throwError(exec, KJS::TypeError, toUString(QString("Could not construct a %1").arg(toQString(className) )));
00215             return KJS::jsNull();
00216         }
00217         return returnValue;
00218     }
00219 }
00220 
00221 #endif
00222 
00223 //kate: indent-spaces on; indent-width 4; replace-tabs on; indent-mode cstyle;

kjsembed

Skip menu "kjsembed"
  • Main Page
  • Namespace List
  • Class Hierarchy
  • Alphabetical List
  • Class List
  • File List
  • Namespace Members
  • Class Members

kdelibs

Skip menu "kdelibs"
  • DNSSD
  • Interfaces
  •   KHexEdit
  •   KMediaPlayer
  •   KSpeech
  •   KTextEditor
  • Kate
  • kconf_update
  • KDE3Support
  •   KUnitTest
  • KDECore
  • KDED
  • KDEsu
  • KDEUI
  • KDocTools
  • KFile
  • KHTML
  • KImgIO
  • KInit
  • kio
  • KIOSlave
  • KJS
  •   KJS-API
  •   WTF
  • kjsembed
  • KNewStuff
  • KParts
  • Kross
  • KUtils
  • Nepomuk
  • Plasma
  • Solid
  • Sonnet
  • ThreadWeaver
Generated for kdelibs by doxygen 1.5.7
This website is maintained by Adriaan de Groot and Allen Winter.
KDE® and the K Desktop Environment® logo are registered trademarks of KDE e.V. | Legal