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tdegraphics/ksvg/ecma/ksvg_lookup.h

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/*
Copyright (C) 2002-2003 KSVG Team
This file is part of the KDE project
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 KSVG_LOOKUP_H
#define KSVG_LOOKUP_H
#include <kjs/object.h>
#include <kjs/lookup.h>
#include <kjs/interpreter.h> // for ExecState
#include "ksvg_bridge.h"
#include "ksvg_scriptinterpreter.h"
#define KSVG_GET_COMMON \
public: \
\
/* The standard hasProperty call, auto-generated. Looks in hashtable, forwards to parents. */ \
bool hasProperty(KJS::ExecState *exec, const KJS::Identifier &propertyName) const; \
\
/* get() method, called by KSVGBridge::get */ \
KJS::Value get(KJS::ExecState *exec, const KJS::Identifier &propertyName, const KJS::ObjectImp* bridge) const; \
\
/* Called by lookupGet(). Auto-generated. Forwards to the parent which has the given property. */ \
KJS::Value getInParents(KJS::ExecState *exec, const KJS::Identifier &propertyName, const KJS::ObjectImp* bridge) const; \
\
KJS::Object prototype(KJS::ExecState *exec) const;\
\
static const KJS::ClassInfo s_classInfo; \
\
static const struct KJS::HashTable s_hashTable; \
\
int m_attrFlags;
// For classes with properties to read, and a hashtable.
#define KSVG_GET \
KSVG_GET_COMMON \
KJS::Value cache(KJS::ExecState *exec) const;
// Same thing, for base classes (kalyptus helps finding them)
// The difference is that cache() is virtual
#define KSVG_BASECLASS_GET \
KSVG_GET_COMMON \
virtual KJS::Value cache(KJS::ExecState *exec) const;
// For classes without properties, but with a parent class to forward to
#define KSVG_FORWARDGET \
public: \
\
bool hasProperty(KJS::ExecState *exec, const KJS::Identifier &propertyName) const; \
\
/* will have the code for getInParents */ \
KJS::Value get(KJS::ExecState *exec, const KJS::Identifier &propertyName, const KJS::ObjectImp* bridge) const; \
\
KJS::Object prototype(KJS::ExecState *exec) const;\
\
static const KJS::ClassInfo s_classInfo; \
\
KJS::Value cache(KJS::ExecState *exec) const;
// For read-write classes only, i.e. those which support put()
#define KSVG_PUT \
\
/* put() method, called by KSVGBridge::put */ \
bool put(KJS::ExecState *exec, const KJS::Identifier &propertyName, const KJS::Value &value, int attr); \
\
/* Called by lookupPut. Auto-generated. Looks in hashtable, forwards to parents. */ \
bool putInParents(KJS::ExecState *exec, const KJS::Identifier &propertyName, const KJS::Value &value, int attr);
// For classes which inherit a read-write class, but have no readwrite property themselves
#define KSVG_FORWARDPUT \
\
/* put() method, called by KSVGBridge::put */ \
bool put(KJS::ExecState *exec, const KJS::Identifier &propertyName, const KJS::Value &value, int attr);
// For classes which need to be accessable with getElementById -> elements
#define KSVG_NO_TAG_BRIDGE \
public: \
KJS::ObjectImp *bridge(KJS::ExecState *) const { return 0; }
#define KSVG_BRIDGE \
public: \
KJS::ObjectImp *bridge(KJS::ExecState *) const; \
virtual DOM::DOMString tagName() const { return s_tagName; } \
static const DOM::DOMString s_tagName;
// Fast setting of default values, if the token is known
// Note: this is actually misnamed it should be KSVG_SET_DEFAULT_ATTRIBUTE
#define KSVG_SET_ALT_ATTRIBUTE(Token, Name) putValueProperty(ownerDoc()->ecmaEngine()->globalExec(), Token, String(Name), Internal);
// Check if attribute has not been parsed, if the token is known
#define KSVG_TOKEN_NOT_PARSED_ELEMENT(Token, Element) (~Element->m_attrFlags & (1 << Token))
#define KSVG_TOKEN_NOT_PARSED(Token) KSVG_TOKEN_NOT_PARSED_ELEMENT(Token, this)
// Checks if the interpreter is in attribute "getting" mode
#define KSVG_CHECK_ATTRIBUTE bool attributeMode = static_cast<KSVGScriptInterpreter *>(exec->interpreter())->attributeGetMode();
// Sets the class specific flags to a ZERO value
#define KSVG_EMPTY_FLAGS m_attrFlags = 0;
// to be used in generatedata.cpp
// GET p1=exec, p2=propertyName, p3=bridge
// PUT p1=exec, p2=propertyName, p3=value, p4=attr
#define GET_METHOD_ARGS KJS::ExecState *p1, const KJS::Identifier &p2, const KJS::ObjectImp *p3
#define PUT_METHOD_ARGS KJS::ExecState *p1, const KJS::Identifier &p2, const KJS::Value &p3, int p4
namespace KSVG
{
/**
* Helper method for property lookups
*
* This method does it all (looking in the hashtable, checking for function
* overrides, creating the function or retrieving from cache, calling
* getValueProperty in case of a non-function property, forwarding to parent[s] if
* unknown property).
*
* Template arguments:
* @param FuncImp the class which implements this object's functions
* @param ThisImp the class of "this". It must implement the getValueProperty(exec,token) method,
* for non-function properties, and the getInParents() method (auto-generated).
*
* Method arguments:
* @param exec execution state, as usual
* @param propertyName the property we're looking for
* @param table the static hashtable for this class
* @param thisObj "this"
*/
template<class FuncImp, class ThisImp>
inline KJS::Value lookupGet(KJS::ExecState *exec,
const KJS::Identifier &propertyName,
const KJS::HashTable *table,
const ThisImp *thisObj, // the 'impl' object
const KJS::ObjectImp *bridge)
{
const KJS::HashEntry *entry = KJS::Lookup::findEntry(table, propertyName);
if(!entry) // not found, forward to parents
return thisObj->getInParents(exec, propertyName, bridge);
if(entry->attr & KJS::Function)
return KJS::lookupOrCreateFunction<FuncImp>(exec, propertyName,
const_cast<KJS::ObjectImp *>(bridge),
entry->value, entry->params, entry->attr);
return thisObj->getValueProperty(exec, entry->value);
}
/**
* Simplified version of lookupGet in case there are no functions, only "values".
* Using this instead of lookupGet removes the need for a FuncImp class.
*/
template <class ThisImp>
inline KJS::Value lookupGetValue(KJS::ExecState *exec,
const KJS::Identifier &propertyName,
const KJS::HashTable *table,
const ThisImp *thisObj, // the 'impl' object
const KJS::ObjectImp *bridge)
{
const KJS::HashEntry *entry = KJS::Lookup::findEntry(table, propertyName);
if(!entry) // not found, forward to parents
return thisObj->getInParents(exec, propertyName, bridge);
if(entry->attr & KJS::Function)
kdError(26004) << "Function bit set! Shouldn't happen in lookupGetValue! propertyName was " << propertyName.qstring() << endl;
return thisObj->getValueProperty(exec, entry->value);
}
/**
* This one is for "put".
* Lookup hash entry for property to be set, and set the value.
* The "this" class must implement putValueProperty.
* If it returns false, put() will return false, and KSVGRequest will set a dynamic property in ObjectImp
*/
template <class ThisImp>
inline bool lookupPut(KJS::ExecState *exec,
const KJS::Identifier &propertyName,
const KJS::Value &value,
int attr,
const KJS::HashTable *table,
ThisImp *thisObj)
{
const KJS::HashEntry *entry = KJS::Lookup::findEntry(table, propertyName);
if(!entry) // not found, forward to parents
return thisObj->putInParents(exec, propertyName, value, attr);
else if(entry->attr & KJS::Function) // Function: put as override property
return false;
else if(entry->attr & KJS::ReadOnly && !(attr & KJS::Internal)) // readonly! Can't put!
{
#ifdef KJS_VERBOSE
kdWarning(26004) <<" Attempt to change value of readonly property '" << propertyName.qstring() << "'" << endl;
#endif
return true; // "we did it" -> don't put override property
}
else
{
if(static_cast<KSVGScriptInterpreter *>(exec->interpreter())->attributeSetMode())
thisObj->m_attrFlags |= (1 << entry->value);
thisObj->putValueProperty(exec, entry->value, value, attr);
return true;
}
}
}
// Same as kjs' DEFINE_PROTOTYPE, but with a pointer to the hashtable too, and no ClassName here
// The ClassProto ctor(exec) must be public, so we can use KJS::cacheGlobalObject... (Niko)
#define KSVG_DEFINE_PROTOTYPE(ClassProto) \
namespace KSVG { \
class ClassProto : public KJS::ObjectImp { \
public: \
static KJS::Object self(KJS::ExecState *exec); \
ClassProto( KJS::ExecState *exec ) \
: KJS::ObjectImp( exec->interpreter()->builtinObjectPrototype() ) {} \
virtual const KJS::ClassInfo *classInfo() const { return &info; } \
static const KJS::ClassInfo info; \
KJS::Value get(KJS::ExecState *exec, const KJS::Identifier &propertyName) const; \
bool hasProperty(KJS::ExecState *exec, const KJS::Identifier &propertyName) const; \
\
static const struct KJS::HashTable s_hashTable; \
}; \
}
// same as IMPLEMENT_PROTOTYPE but in the KSVG namespace, and with ClassName here
// so that KSVG_DEFINE_PROTOTYPE can be put in a header file ('info' defined here)
#define KSVG_IMPLEMENT_PROTOTYPE(ClassName,ClassProto,ClassFunc) \
KJS::Value KSVG::ClassProto::get(KJS::ExecState *exec, const KJS::Identifier &propertyName) const \
{ \
return lookupGetFunction<ClassFunc,KJS::ObjectImp>(exec, propertyName, &s_hashTable, this ); \
} \
bool KSVG::ClassProto::hasProperty(KJS::ExecState *exec, const KJS::Identifier &propertyName) const \
{ /*stupid but we need this to have a common macro for the declaration*/ \
return KJS::ObjectImp::hasProperty(exec, propertyName); \
} \
KJS::Object KSVG::ClassProto::self(KJS::ExecState *exec) \
{ \
return KJS::cacheGlobalObject<ClassProto>( exec, "[[" ClassName ".prototype]]" ); \
} \
const KJS::ClassInfo ClassProto::info = { ClassName, 0, &s_hashTable, 0 }; \
// same as KSVG_IMPLEMENT_PROTOTYPE but with a parent class to forward calls to
// Not used within KSVG up to now - each class does a self proto lookup in generateddata.cpp
#define KSVG_IMPLEMENT_PROTOTYPE_WITH_PARENT(ClassName,ClassProto,ClassFunc,ParentProto) \
KJS::Value KSVG::ClassProto::get(KJS::ExecState *exec, const KJS::Identifier &propertyName) const \
{ \
KJS::Value val = lookupGetFunction<ClassFunc,KJS::ObjectImp>(exec, propertyName, &s_hashTable, this ); \
if ( val.type() != UndefinedType ) return val; \
/* Not found -> forward request to "parent" prototype */ \
return ParentProto::self(exec).get( exec, propertyName ); \
} \
bool KSVG::ClassProto::hasProperty(KJS::ExecState *exec, const KJS::Identifier &propertyName) const \
{ \
if (KJS::ObjectImp::hasProperty(exec, propertyName)) \
return true; \
return ParentProto::self(exec).hasProperty(exec, propertyName); \
} \
KJS::Object KSVG::ClassProto::self(KJS::ExecState *exec) \
{ \
return KJS::cacheGlobalObject<ClassProto>( exec, "[[" ClassName ".prototype]]" ); \
} \
const KJS::ClassInfo ClassProto::info = { ClassName, 0, &s_hashTable, 0 }; \
#define KSVG_IMPLEMENT_PROTOFUNC(ClassFunc,Class) \
namespace KSVG { \
class ClassFunc : public KJS::ObjectImp { \
public: \
ClassFunc(KJS::ExecState *exec, int i, int len) \
: KJS::ObjectImp( /*proto? */ ), id(i) { \
KJS::Value protect(this); \
put(exec,"length",KJS::Number(len),KJS::DontDelete|KJS::ReadOnly|KJS::DontEnum); \
} \
/** Used by call() to check the type of thisObj. Generated code */ \
Class * cast(const KJS::ObjectImp* bridge) const; \
\
virtual bool implementsCall() const { return true; } \
/** You need to implement that one */ \
virtual KJS::Value call(KJS::ExecState *exec, KJS::Object &thisObj, const KJS::List &args); \
private: \
int id; \
}; \
}
// To be used when casting the type of an argument
#define KSVG_CHECK(ClassName, theObj) \
ClassName* obj = cast(static_cast<KJS::ObjectImp*>(theObj.imp())); \
if (!obj) { \
kdDebug(26004) << k_funcinfo << " Wrong object type: expected " << ClassName::s_classInfo.className << " got " << thisObj.classInfo()->className << endl; \
Object err = Error::create(exec,TypeError); \
exec->setException(err); \
return err; \
}
// To be used in all call() implementations!
// Can't use if (!thisObj.inherits(&ClassName::s_classInfo) since we don't
// use the (single-parent) inheritance of ClassInfo...
#define KSVG_CHECK_THIS(ClassName) KSVG_CHECK(ClassName, thisObj)
#endif