kjs Library: object.h Source File (kjs Library)

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# object.h

    00001 // -*- c-basic-offset: 2 -*-
    00002 /*
    00003  *  This file is part of the KDE libraries
    00004  *  Copyright (C) 1999-2001 Harri Porten (porten@kde.org)
    00005  *  Copyright (C) 2001 Peter Kelly (pmk@post.com)
    00006  *  Copyright (C) 2003 Apple Computer, Inc.
    00007  *
    00008  *  This library is free software; you can redistribute it and/or
    00009  *  modify it under the terms of the GNU Library General Public
    00010  *  License as published by the Free Software Foundation; either
    00011  *  version 2 of the License, or (at your option) any later version.
    00012  *
    00013  *  This library is distributed in the hope that it will be useful,
    00014  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
    00015  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    00016  *  Library General Public License for more details.
    00017  *
    00018  *  You should have received a copy of the GNU Library General Public License
    00019  *  along with this library; see the file COPYING.LIB.  If not, write to
    00020  *  the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    00021  *  Boston, MA 02111-1307, USA.
    00022  *
    00023  */
    00024
    00025
    00026 #ifndef _KJS_OBJECT_H_
    00027 #define _KJS_OBJECT_H_
    00028
    00029 // Objects
    00030
    00031 #include "value.h"
    00032 #include "types.h"
    00033 #include "reference_list.h"
    00034 #include "identifier.h"
    00035 #include "property_map.h"
    00036 #include "scope_chain.h"
    00037
    00038 namespace KJS {
    00039
    00040   class ObjectImpPrivate;
    00041   class PropertyMap;
    00042   class HashTable;
    00043   struct HashEntry;
    00044   class ListImp;
    00045
    00046   // ECMA 262-3 8.6.1
    00047   // Attributes (only applicable to the Object type)
    00048   enum Attribute { None       = 0,
    00049                    ReadOnly   = 1 << 1, // property can be only read, not written
    00050                    DontEnum   = 1 << 2, // property doesn't appear in (for .. in ..)
    00051                    DontDelete = 1 << 3, // property can't be deleted
    00052                    Internal   = 1 << 4, // an internal property, set to by pass checks
    00053                    Function   = 1 << 5 }; // property is a function - only used by static hashtables
    00054
    00058   struct ClassInfo {
    00062     const char* className;
    00067     const ClassInfo *parentClass;
    00071     const HashTable *propHashTable;
    00075     void *dummy;
    00076   };
    00077
    00081   class KJS_EXPORT Object : public Value {
    00082   public:
    00083     Object() { }
    00084     explicit Object(ObjectImp *v);
    00085
    00086     ObjectImp *imp() const;
    00087
    00088     const ClassInfo *classInfo() const;
    00089     bool inherits(const ClassInfo *cinfo) const;
    00090
    00100     static Object dynamicCast(const Value &v);
    00101
    00110     Value prototype() const;
    00111
    00119     UString className() const;
    00120
    00133     Value get(ExecState *exec, const Identifier &propertyName) const;
    00134     Value get(ExecState *exec, unsigned propertyName) const;
    00135
    00145     void put(ExecState *exec, const Identifier &propertyName,
    00146          const Value &value, int attr = None);
    00147     void put(ExecState *exec, unsigned propertyName,
    00148          const Value &value, int attr = None);
    00149
    00160     bool canPut(ExecState *exec, const Identifier &propertyName) const;
    00161
    00172     bool hasProperty(ExecState *exec, const Identifier &propertyName) const;
    00173     bool hasProperty(ExecState *exec, unsigned propertyName) const;
    00174
    00186     bool deleteProperty(ExecState *exec, const Identifier &propertyName);
    00187     bool deleteProperty(ExecState *exec, unsigned propertyName);
    00188
    00201     Value defaultValue(ExecState *exec, Type hint) const;
    00202
    00211     bool implementsConstruct() const;
    00212
    00238     Object construct(ExecState *exec, const List &args);
    00239
    00248     bool implementsCall() const;
    00249
    00250
    00268     Value call(ExecState *exec, Object &thisObj, const List &args);
    00269
    00278     bool implementsHasInstance() const;
    00279
    00289     Boolean hasInstance(ExecState *exec, const Value &value);
    00290
    00316     const ScopeChain &scope() const;
    00317     void setScope(const ScopeChain &s);
    00318
    00335     ReferenceList propList(ExecState *exec, bool recursive = true);
    00336
    00345     Value internalValue() const;
    00346
    00354     void setInternalValue(const Value &v);
    00355   };
    00356
    00357   inline Object Value::toObject(ExecState *exec) const { return rep->dispatchToObject(exec); }
    00358
    00359   class KJS_EXPORT ObjectImp : public ValueImp {
    00360     friend class ObjectProtoFuncImp;
    00361   public:
    00367     ObjectImp(const Object &proto);
    00368     ObjectImp(ObjectImp *proto);
    00369
    00375     ObjectImp();
    00376
    00377     virtual ~ObjectImp();
    00378
    00379     virtual void mark();
    00380
    00381     Type type() const;
    00382
    00420     virtual const ClassInfo *classInfo() const;
    00421
    00448     bool inherits(const ClassInfo *cinfo) const;
    00449
    00450     // internal properties (ECMA 262-3 8.6.2)
    00451
    00458     Value prototype() const;
    00459     void setPrototype(const Value &proto);
    00460
    00472     virtual UString className() const;
    00473
    00480     // [[Get]] - must be implemented by all Objects
    00481     virtual Value get(ExecState *exec, const Identifier &propertyName) const;
    00482     virtual Value getPropertyByIndex(ExecState *exec,
    00483                      unsigned propertyName) const;
    00484
    00491     virtual void put(ExecState *exec, const Identifier &propertyName,
    00492              const Value &value, int attr = None);
    00493     virtual void putPropertyByIndex(ExecState *exec, unsigned propertyName,
    00494                     const Value &value, int attr = None);
    00495
    00502     virtual bool canPut(ExecState *exec, const Identifier &propertyName) const;
    00503
    00510     virtual bool hasProperty(ExecState *exec,
    00511                  const Identifier &propertyName) const;
    00512     virtual bool hasPropertyByIndex(ExecState *exec, unsigned propertyName) const;
    00513
    00520     virtual bool deleteProperty(ExecState *exec,
    00521                 const Identifier &propertyName);
    00522     virtual bool deletePropertyByIndex(ExecState *exec, unsigned propertyName);
    00523
    00529     void deleteAllProperties(ExecState *);
    00530
    00537     virtual Value defaultValue(ExecState *exec, Type hint) const;
    00538
    00539     virtual bool implementsConstruct() const;
    00545     virtual Object construct(ExecState *exec, const List &args);
    00546
    00547     virtual bool implementsCall() const;
    00553     virtual Value call(ExecState *exec, Object &thisObj,
    00554                        const List &args);
    00555
    00556     virtual bool implementsHasInstance() const;
    00562     virtual Boolean hasInstance(ExecState *exec, const Value &value);
    00563
    00569     const ScopeChain &scope() const { return _scope; }
    00570     void setScope(const ScopeChain &s) { _scope = s; }
    00571
    00572     virtual ReferenceList propList(ExecState *exec, bool recursive = true);
    00573
    00574     Value internalValue() const;
    00575     void setInternalValue(const Value &v);
    00576     void setInternalValue(ValueImp *v);
    00577
    00578     Value toPrimitive(ExecState *exec,
    00579                       Type preferredType = UnspecifiedType) const;
    00580     bool toBoolean(ExecState *exec) const;
    00581     double toNumber(ExecState *exec) const;
    00582     UString toString(ExecState *exec) const;
    00583     Object toObject(ExecState *exec) const;
    00584
    00585     // This get method only looks at the property map.
    00586     // A bit like hasProperty(recursive=false), this doesn't go to the prototype.
    00587     // This is used e.g. by lookupOrCreateFunction (to cache a function, we don't want
    00588     // to look up in the prototype, it might already exist there)
    00589     ValueImp *getDirect(const Identifier& propertyName) const
    00590         { return _prop.get(propertyName); }
    00591     void putDirect(const Identifier &propertyName, ValueImp *value, int attr = 0);
    00592     void putDirect(const Identifier &propertyName, int value, int attr = 0);
    00593
    00598     void setFunctionName(const Identifier &propertyName);
    00599
    00600   protected:
    00601     PropertyMap _prop;
    00602   private:
    00603     const HashEntry* findPropertyHashEntry( const Identifier& propertyName ) const;
    00604     ObjectImpPrivate *_od;
    00605     ValueImp *_proto;
    00606     ValueImp *_internalValue;
    00607     ScopeChain _scope;
    00608   };
    00609
    00614   enum ErrorType { GeneralError   = 0,
    00615                    EvalError      = 1,
    00616                    RangeError     = 2,
    00617                    ReferenceError = 3,
    00618                    SyntaxError    = 4,
    00619                    TypeError      = 5,
    00620                    URIError       = 6};
    00621
    00625   class KJS_EXPORT Error {
    00626   public:
    00636     static Object create(ExecState *exec, ErrorType errtype = GeneralError,
    00637                          const char *message = 0, int lineno = -1,
    00638                          int sourceId = -1);
    00639
    00643     static const char * const * const errorNames;
    00644   };
    00645
    00646   inline Object::Object(ObjectImp *v) : Value(v) { }
    00647
    00648   inline ObjectImp *Object::imp() const { return static_cast<ObjectImp*>(rep); }
    00649
    00650   inline const ClassInfo *Object::classInfo() const
    00651     { return imp()->classInfo(); }
    00652
    00653   inline bool Object::inherits(const ClassInfo *cinfo) const
    00654     { return imp()->inherits(cinfo); }
    00655
    00656   inline Value Object::prototype() const
    00657     { return Value(imp()->prototype()); }
    00658
    00659   inline UString Object::className() const
    00660     { return imp()->className(); }
    00661
    00662   inline Value Object::get(ExecState *exec, const Identifier &propertyName) const
    00663     { return imp()->get(exec,propertyName); }
    00664
    00665   inline Value Object::get(ExecState *exec, unsigned propertyName) const
    00666     { return imp()->getPropertyByIndex(exec, propertyName); }
    00667
    00668   inline void Object::put(ExecState *exec, const Identifier &propertyName, const Value &value, int attr)
    00669     { imp()->put(exec,propertyName,value,attr); }
    00670
    00671   inline void Object::put(ExecState *exec, unsigned propertyName, const Value &value, int attr)
    00672     { imp()->putPropertyByIndex(exec, propertyName, value, attr); }
    00673
    00674   inline bool Object::canPut(ExecState *exec, const Identifier &propertyName) const
    00675     { return imp()->canPut(exec,propertyName); }
    00676
    00677   inline bool Object::hasProperty(ExecState *exec, const Identifier &propertyName) const
    00678     { return imp()->hasProperty(exec, propertyName); }
    00679
    00680   inline bool Object::hasProperty(ExecState *exec, unsigned propertyName) const
    00681     { return imp()->hasPropertyByIndex(exec, propertyName); }
    00682
    00683   inline bool Object::deleteProperty(ExecState *exec, const Identifier &propertyName)
    00684     { return imp()->deleteProperty(exec,propertyName); }
    00685
    00686   inline bool Object::deleteProperty(ExecState *exec, unsigned propertyName)
    00687     { return imp()->deletePropertyByIndex(exec, propertyName); }
    00688
    00689   inline Value Object::defaultValue(ExecState *exec, Type hint) const
    00690     { return imp()->defaultValue(exec,hint); }
    00691
    00692   inline bool Object::implementsConstruct() const
    00693     { return imp()->implementsConstruct(); }
    00694
    00695   inline Object Object::construct(ExecState *exec, const List &args)
    00696     { return imp()->construct(exec,args); }
    00697
    00698   inline bool Object::implementsCall() const
    00699     { return imp()->implementsCall(); }
    00700
    00701   inline bool Object::implementsHasInstance() const
    00702     { return imp()->implementsHasInstance(); }
    00703
    00704   inline Boolean Object::hasInstance(ExecState *exec, const Value &value)
    00705     { return imp()->hasInstance(exec,value); }
    00706
    00707   inline const ScopeChain &Object::scope() const
    00708     { return imp()->scope(); }
    00709
    00710   inline void Object::setScope(const ScopeChain &s)
    00711     { imp()->setScope(s); }
    00712
    00713   inline ReferenceList Object::propList(ExecState *exec, bool recursive)
    00714     { return imp()->propList(exec,recursive); }
    00715
    00716   inline Value Object::internalValue() const
    00717     { return imp()->internalValue(); }
    00718
    00719   inline void Object::setInternalValue(const Value &v)
    00720     { imp()->setInternalValue(v); }
    00721
    00722 } // namespace
    00723
    00724 #endif // _KJS_OBJECT_H_

This file is part of the documentation for kjs Library Version 3.4.1.
Documentation copyright © 1996-2004 the KDE developers.
Generated on Sat Jun 11 20:23:07 2005 by doxygen 1.4.1 written by Dimitri van Heesch, © 1997-2003