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authortoma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2009-11-25 17:56:58 +0000
committertoma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2009-11-25 17:56:58 +0000
commitce599e4f9f94b4eb00c1b5edb85bce5431ab3df2 (patch)
treed3bb9f5d25a2dc09ca81adecf39621d871534297 /kig/misc/object_hierarchy.cc
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Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.
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+// Copyright (C) 2003 Dominique Devriese <devriese@kde.org>
+
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License
+// as published by the Free Software Foundation; either version 2
+// of the License, or (at your option) any later version.
+
+// This program 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 General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+// 02110-1301, USA.
+
+#include "object_hierarchy.h"
+
+#include "../objects/object_holder.h"
+#include "../objects/other_type.h"
+#include "../objects/object_imp.h"
+#include "../objects/object_imp_factory.h"
+#include "../objects/object_type_factory.h"
+#include "../objects/bogus_imp.h"
+#include "../objects/transform_types.h"
+#include "../objects/object_type.h"
+
+#include <kglobal.h>
+#include <qdom.h>
+
+class ObjectHierarchy::Node
+{
+public:
+ enum { ID_PushStack, ID_ApplyType, ID_FetchProp };
+ virtual int id() const = 0;
+
+ virtual ~Node();
+ virtual Node* copy() const = 0;
+
+ virtual void apply( std::vector<const ObjectImp*>& stack, int loc,
+ const KigDocument& ) const = 0;
+
+ virtual void apply( std::vector<ObjectCalcer*>& stack, int loc ) const = 0;
+
+ // this function is used to check whether the final objects depend
+ // on the given objects. The dependsstack contains a set of
+ // booleans telling which parts of the hierarchy certainly depend on
+ // the given objects. In this function, the node should check
+ // whether any of its parents have true set, and if so, set its own
+ // value to true.
+ virtual void checkDependsOnGiven( std::vector<bool>& dependsstack, int loc ) const = 0;
+ // this function is used to check whether the given objects are all
+ // used by one or more of the final objects. The usedstack contains
+ // a set of booleans telling which parts of the hierarchy are
+ // certainly ancestors of the final objects. In this function, the
+ // node should set all of its parents' booleans to true.
+ virtual void checkArgumentsUsed( std::vector<bool>& usedstack ) const = 0;
+};
+
+ObjectHierarchy::Node::~Node()
+{
+}
+
+class PushStackNode
+ : public ObjectHierarchy::Node
+{
+ ObjectImp* mimp;
+public:
+ PushStackNode( ObjectImp* imp ) : mimp( imp ) {}
+ ~PushStackNode();
+
+ const ObjectImp* imp() const { return mimp; }
+
+ int id() const;
+ Node* copy() const;
+ void apply( std::vector<const ObjectImp*>& stack,
+ int loc, const KigDocument& ) const;
+ void apply( std::vector<ObjectCalcer*>& stack, int loc ) const;
+
+ void checkDependsOnGiven( std::vector<bool>& dependsstack, int loc ) const;
+ void checkArgumentsUsed( std::vector<bool>& usedstack ) const;
+};
+
+void PushStackNode::checkArgumentsUsed( std::vector<bool>& ) const
+{
+}
+
+void PushStackNode::apply( std::vector<ObjectCalcer*>& stack, int loc ) const
+{
+ stack[loc] = new ObjectConstCalcer( mimp->copy() );
+}
+
+void PushStackNode::checkDependsOnGiven( std::vector<bool>&, int ) const {
+ // pushstacknode depends on nothing..
+ return;
+}
+
+int PushStackNode::id() const { return ID_PushStack; }
+
+PushStackNode::~PushStackNode()
+{
+ delete mimp;
+}
+
+ObjectHierarchy::Node* PushStackNode::copy() const
+{
+ return new PushStackNode( mimp->copy() );
+}
+
+void PushStackNode::apply( std::vector<const ObjectImp*>& stack,
+ int loc, const KigDocument& ) const
+{
+ stack[loc] = mimp->copy();
+}
+
+class ApplyTypeNode
+ : public ObjectHierarchy::Node
+{
+ const ObjectType* mtype;
+ std::vector<int> mparents;
+public:
+ ApplyTypeNode( const ObjectType* type, const std::vector<int>& parents )
+ : mtype( type ), mparents( parents ) {}
+ ~ApplyTypeNode();
+ Node* copy() const;
+
+ const ObjectType* type() const { return mtype; }
+ const std::vector<int>& parents() const { return mparents; }
+
+ int id() const;
+ void apply( std::vector<const ObjectImp*>& stack,
+ int loc, const KigDocument& ) const;
+ void apply( std::vector<ObjectCalcer*>& stack, int loc ) const;
+
+ void checkDependsOnGiven( std::vector<bool>& dependsstack, int loc ) const;
+ void checkArgumentsUsed( std::vector<bool>& usedstack ) const;
+};
+
+int ApplyTypeNode::id() const { return ID_ApplyType; }
+
+void ApplyTypeNode::checkArgumentsUsed( std::vector<bool>& usedstack ) const
+{
+ for ( uint i = 0; i < mparents.size(); ++i )
+ {
+ usedstack[mparents[i]] = true;
+ }
+}
+
+void ApplyTypeNode::checkDependsOnGiven( std::vector<bool>& dependsstack, int loc ) const
+{
+ bool result = false;
+ for ( uint i = 0; i < mparents.size(); ++i )
+ if ( dependsstack[mparents[i]] == true ) result = true;
+ dependsstack[loc] = result;
+}
+
+ApplyTypeNode::~ApplyTypeNode()
+{
+}
+
+ObjectHierarchy::Node* ApplyTypeNode::copy() const
+{
+ return new ApplyTypeNode( mtype, mparents );
+}
+
+void ApplyTypeNode::apply( std::vector<ObjectCalcer*>& stack, int loc ) const
+{
+ std::vector<ObjectCalcer*> parents;
+ for ( uint i = 0; i < mparents.size(); ++i )
+ parents.push_back( stack[ mparents[i] ] );
+ stack[loc] = new ObjectTypeCalcer( mtype, parents );
+}
+
+void ApplyTypeNode::apply( std::vector<const ObjectImp*>& stack,
+ int loc, const KigDocument& doc ) const
+{
+ Args args;
+ for ( uint i = 0; i < mparents.size(); ++i )
+ args.push_back( stack[mparents[i]] );
+ args = mtype->sortArgs( args );
+ stack[loc] = mtype->calc( args, doc );
+}
+
+class FetchPropertyNode
+ : public ObjectHierarchy::Node
+{
+ mutable int mpropid;
+ int mparent;
+ const QCString mname;
+public:
+ // propid is a cache of the location of name in the parent's
+ // propertiesInternalNames(), just as it is in PropertyObject. We
+ // don't want to ever save this value, since we cannot guarantee it
+ // remains consistent if we add properties some place..
+ FetchPropertyNode( const int parent, const QCString& name, const int propid = -1 )
+ : mpropid( propid ), mparent( parent ), mname( name ) {}
+ ~FetchPropertyNode();
+ Node* copy() const;
+
+ void checkDependsOnGiven( std::vector<bool>& dependsstack, int loc ) const;
+ void checkArgumentsUsed( std::vector<bool>& usedstack ) const;
+ int parent() const { return mparent; }
+ const QCString& propinternalname() const { return mname; }
+
+ int id() const;
+ void apply( std::vector<const ObjectImp*>& stack,
+ int loc, const KigDocument& ) const;
+ void apply( std::vector<ObjectCalcer*>& stack, int loc ) const;
+};
+
+FetchPropertyNode::~FetchPropertyNode()
+{
+}
+
+void FetchPropertyNode::checkArgumentsUsed( std::vector<bool>& usedstack ) const
+{
+ usedstack[mparent] = true;
+}
+
+void FetchPropertyNode::checkDependsOnGiven( std::vector<bool>& dependsstack, int loc ) const
+{
+ dependsstack[loc] = dependsstack[mparent];
+}
+
+ObjectHierarchy::Node* FetchPropertyNode::copy() const
+{
+ return new FetchPropertyNode( mparent, mname, mpropid );
+}
+
+int FetchPropertyNode::id() const
+{
+ return ID_FetchProp;
+}
+
+void FetchPropertyNode::apply( std::vector<const ObjectImp*>& stack,
+ int loc, const KigDocument& d ) const
+{
+ assert( stack[mparent] );
+ if ( mpropid == -1 ) mpropid = stack[mparent]->propertiesInternalNames().findIndex( mname );
+ if ( mpropid != -1 )
+ stack[loc] = stack[mparent]->property( mpropid, d );
+ else
+ stack[loc] = new InvalidImp();
+}
+
+void FetchPropertyNode::apply( std::vector<ObjectCalcer*>& stack, int loc ) const
+{
+ if ( mpropid == -1 )
+ mpropid = stack[mparent]->imp()->propertiesInternalNames().findIndex( mname );
+ assert( mpropid != -1 );
+ stack[loc] = new ObjectPropertyCalcer( stack[mparent], mpropid );
+}
+
+std::vector<ObjectImp*> ObjectHierarchy::calc( const Args& a, const KigDocument& doc ) const
+{
+ assert( a.size() == mnumberofargs );
+ for ( uint i = 0; i < a.size(); ++i )
+ assert( a[i]->inherits( margrequirements[i] ) );
+
+ std::vector<const ObjectImp*> stack;
+ stack.resize( mnodes.size() + mnumberofargs, 0 );
+ std::copy( a.begin(), a.end(), stack.begin() );
+ for( uint i = 0; i < mnodes.size(); ++i )
+ {
+ mnodes[i]->apply( stack, mnumberofargs + i, doc );
+ };
+ for ( uint i = mnumberofargs; i < stack.size() - mnumberofresults; ++i )
+ delete stack[i];
+ if ( stack.size() < mnumberofargs + mnumberofresults )
+ {
+ std::vector<ObjectImp*> ret;
+ ret.push_back( new InvalidImp );
+ return ret;
+ }
+ else
+ {
+ std::vector<ObjectImp*> ret;
+ for ( uint i = stack.size() - mnumberofresults; i < stack.size(); ++i )
+ ret.push_back( const_cast<ObjectImp*>( stack[i] ) );
+ return ret;
+ };
+}
+
+int ObjectHierarchy::visit( const ObjectCalcer* o, std::map<const ObjectCalcer*, int>& seenmap,
+ bool needed, bool neededatend )
+{
+ using namespace std;
+
+ std::map<const ObjectCalcer*, int>::iterator smi = seenmap.find( o );
+ if ( smi != seenmap.end() )
+ {
+ if ( neededatend )
+ {
+ // neededatend means that this object is one of the resultant
+ // objects. Therefore, its node has to appear at the end,
+ // because that's where we expect it.. We therefore copy it
+ // there using CopyObjectType..
+ int ret = mnumberofargs + mnodes.size();
+ std::vector<int> parents;
+ parents.push_back( smi->second );
+ mnodes.push_back( new ApplyTypeNode( CopyObjectType::instance(), parents ) );
+ return ret;
+ }
+ else return smi->second;
+ }
+
+ std::vector<ObjectCalcer*> p( o->parents() );
+ // we check if o descends from the given objects..
+ bool descendsfromgiven = false;
+ std::vector<int> parents;
+ parents.resize( p.size(), -1 );
+ for ( uint i = 0; i < p.size(); ++i )
+ {
+ int v = visit( p[i], seenmap, false );
+ parents[i] = v;
+ descendsfromgiven |= (v != -1);
+ };
+
+ if ( ! descendsfromgiven && ! ( needed && o->imp()->isCache() ) )
+ {
+ if ( needed )
+ {
+ assert( ! o->imp()->isCache() );
+ // o is an object that does not depend on the given objects, but
+ // is needed by other objects, so we just have to just save its
+ // current value here.
+ Node* node = new PushStackNode( o->imp()->copy() );
+ mnodes.push_back( node );
+ int ret = mnodes.size() + mnumberofargs - 1;
+ seenmap[o] = ret;
+ return ret;
+ }
+ else
+ return -1;
+ };
+
+ return storeObject( o, p, parents, seenmap );
+}
+
+ObjectHierarchy::~ObjectHierarchy()
+{
+ for ( uint i = 0; i < mnodes.size(); ++i ) delete mnodes[i];
+}
+
+ObjectHierarchy::ObjectHierarchy( const ObjectHierarchy& h )
+ : mnumberofargs( h.mnumberofargs ), mnumberofresults( h.mnumberofresults ),
+ margrequirements( h.margrequirements ), musetexts( h.musetexts ),
+ mselectstatements( h.mselectstatements )
+{
+ mnodes.reserve( h.mnodes.size() );
+ for ( uint i = 0; i < h.mnodes.size(); ++i )
+ mnodes.push_back( h.mnodes[i]->copy() );
+}
+
+ObjectHierarchy ObjectHierarchy::withFixedArgs( const Args& a ) const
+{
+ assert( a.size() <= mnumberofargs );
+ ObjectHierarchy ret( *this );
+
+ ret.mnumberofargs -= a.size();
+ ret.margrequirements.resize( ret.mnumberofargs );
+
+ std::vector<Node*> newnodes( mnodes.size() + a.size() );
+ std::vector<Node*>::iterator newnodesiter = newnodes.begin();
+ for ( uint i = 0; i < a.size(); ++i )
+ {
+ assert( ! a[i]->isCache() );
+ *newnodesiter++ = new PushStackNode( a[i]->copy() );
+ };
+ std::copy( ret.mnodes.begin(), ret.mnodes.end(), newnodesiter );
+ ret.mnodes = newnodes;
+
+ return ret;
+}
+
+void ObjectHierarchy::init( const std::vector<ObjectCalcer*>& from, const std::vector<ObjectCalcer*>& to )
+{
+ mnumberofargs = from.size();
+ mnumberofresults = to.size();
+ margrequirements.resize( from.size(), ObjectImp::stype() );
+ musetexts.resize( margrequirements.size(), "" );
+ std::map<const ObjectCalcer*, int> seenmap;
+ for ( uint i = 0; i < from.size(); ++i )
+ seenmap[from[i]] = i;
+ for ( std::vector<ObjectCalcer*>::const_iterator i = to.begin(); i != to.end(); ++i )
+ {
+ std::vector<ObjectCalcer*> parents = (*i)->parents();
+ for ( std::vector<ObjectCalcer*>::const_iterator j = parents.begin();
+ j != parents.end(); ++j )
+ visit( *j, seenmap, true );
+ }
+ for ( std::vector<ObjectCalcer*>::const_iterator i = to.begin(); i != to.end(); ++i )
+ visit( *i, seenmap, true, true );
+
+ mselectstatements.resize( margrequirements.size(), "" );
+}
+
+ObjectHierarchy::ObjectHierarchy( const std::vector<ObjectCalcer*>& from, const ObjectCalcer* to )
+{
+ std::vector<ObjectCalcer*> tov;
+ tov.push_back( const_cast<ObjectCalcer*>( to ) );
+ init( from, tov );
+}
+
+ObjectHierarchy::ObjectHierarchy( const std::vector<ObjectCalcer*>& from, const std::vector<ObjectCalcer*>& to )
+{
+ init( from, to );
+}
+
+void ObjectHierarchy::serialize( QDomElement& parent, QDomDocument& doc ) const
+{
+ int id = 1;
+ for ( uint i = 0; i < mnumberofargs; ++i )
+ {
+ QDomElement e = doc.createElement( "input" );
+ e.setAttribute( "id", id++ );
+ e.setAttribute( "requirement", margrequirements[i]->internalName() );
+ // we don't save these atm, since the user can't define them.
+ // we only load them from builtin macro's.
+// QDomElement ut = doc.createElement( "UseText" );
+// ut.appendChild( doc.createTextNode( QString::fromLatin1(musetexts[i].c_str() ) ) );
+// e.appendChild( ut );
+// QDomElement ss = doc.createElement( "SelectStatement" );
+// ss.appendChild( doc.createTextNode( QString::fromLatin1(mselectstatements[i].c_str() ) ) );
+// e.appendChild( ss );
+ parent.appendChild( e );
+ }
+
+ for ( uint i = 0; i < mnodes.size(); ++i )
+ {
+ bool result = mnodes.size() - ( id - mnumberofargs - 1 ) <= mnumberofresults;
+ QDomElement e = doc.createElement( result ? "result" : "intermediate" );
+ e.setAttribute( "id", id++ );
+
+ if ( mnodes[i]->id() == Node::ID_ApplyType )
+ {
+ const ApplyTypeNode* node = static_cast<const ApplyTypeNode*>( mnodes[i] );
+ e.setAttribute( "action", "calc" );
+ e.setAttribute( "type", QString::fromLatin1( node->type()->fullName() ) );
+ for ( uint i = 0; i < node->parents().size(); ++i )
+ {
+ int parent = node->parents()[i] + 1;
+ QDomElement arge = doc.createElement( "arg" );
+ arge.appendChild( doc.createTextNode( QString::number( parent ) ) );
+ e.appendChild( arge );
+ };
+ }
+ else if ( mnodes[i]->id() == Node::ID_FetchProp )
+ {
+ const FetchPropertyNode* node = static_cast<const FetchPropertyNode*>( mnodes[i] );
+ e.setAttribute( "action", "fetch-property" );
+ e.setAttribute( "property", node->propinternalname() );
+ QDomElement arge = doc.createElement( "arg" );
+ arge.appendChild( doc.createTextNode( QString::number( node->parent() + 1 ) ) );
+ e.appendChild( arge );
+ }
+ else
+ {
+ assert( mnodes[i]->id() == ObjectHierarchy::Node::ID_PushStack );
+ const PushStackNode* node = static_cast<const PushStackNode*>( mnodes[i] );
+ e.setAttribute( "action", "push" );
+ QString type = ObjectImpFactory::instance()->serialize( *node->imp(), e, doc );
+ e.setAttribute( "type", type );
+ };
+
+ parent.appendChild( e );
+ };
+}
+
+ObjectHierarchy::ObjectHierarchy()
+ : mnumberofargs( 0 ), mnumberofresults( 0 )
+{
+}
+
+ObjectHierarchy* ObjectHierarchy::buildSafeObjectHierarchy( const QDomElement& parent, QString& error )
+{
+#define KIG_GENERIC_PARSE_ERROR \
+ { \
+ error = i18n( "An error was encountered at line %1 in file %2." ) \
+ .arg( __LINE__ ).arg( __FILE__ ); \
+ return 0; \
+ }
+
+ ObjectHierarchy* obhi = new ObjectHierarchy();
+
+ bool ok = true;
+ QString tmp;
+ QDomElement e = parent.firstChild().toElement();
+ for (; !e.isNull(); e = e.nextSibling().toElement() )
+ {
+ if ( e.tagName() != "input" ) break;
+
+ tmp = e.attribute( "id" );
+ uint id = tmp.toInt( &ok );
+ if ( !ok ) KIG_GENERIC_PARSE_ERROR;
+
+ obhi->mnumberofargs = kMax( id, obhi->mnumberofargs );
+
+ tmp = e.attribute( "requirement" );
+ const ObjectImpType* req = ObjectImpType::typeFromInternalName( tmp.latin1() );
+ if ( req == 0 ) req = ObjectImp::stype(); // sucks, i know..
+ obhi->margrequirements.resize( obhi->mnumberofargs, ObjectImp::stype() );
+ obhi->musetexts.resize( obhi->mnumberofargs, "" );
+ obhi->mselectstatements.resize( obhi->mnumberofargs, "" );
+ obhi->margrequirements[id - 1] = req;
+ obhi->musetexts[id - 1] = req->selectStatement();
+ QDomElement esub = e.firstChild().toElement();
+ for ( ; !esub.isNull(); esub = esub.nextSibling().toElement() )
+ {
+ if ( esub.tagName() == "UseText" )
+ {
+ obhi->musetexts[id - 1] = esub.text().latin1();
+ }
+ else if ( esub.tagName() == "SelectStatement" )
+ {
+ obhi->mselectstatements[id - 1] = esub.text().latin1();
+ }
+ else
+ {
+ // broken file ? ignore...
+ }
+ }
+ }
+ for (; !e.isNull(); e = e.nextSibling().toElement() )
+ {
+ bool result = e.tagName() == "result";
+ if ( result ) ++obhi->mnumberofresults;
+
+ tmp = e.attribute( "id" );
+ int id = tmp.toInt( &ok );
+ if ( !ok ) KIG_GENERIC_PARSE_ERROR;
+
+ tmp = e.attribute( "action" );
+ Node* newnode = 0;
+ if ( tmp == "calc" )
+ {
+ // ApplyTypeNode
+ QCString typen = e.attribute( "type" ).latin1();
+ const ObjectType* type = ObjectTypeFactory::instance()->find( typen );
+ if ( ! type )
+ {
+ error = i18n( "This Kig file uses an object of type \"%1\", "
+ "which this Kig version does not support."
+ "Perhaps you have compiled Kig without support "
+ "for this object type,"
+ "or perhaps you are using an older Kig version." ).arg( typen );
+ return 0;
+ }
+
+ std::vector<int> parents;
+ for ( QDomNode p = e.firstChild(); !p.isNull(); p = p.nextSibling() )
+ {
+ QDomElement q = p.toElement();
+ if ( q.isNull() ) KIG_GENERIC_PARSE_ERROR; // see above
+ if ( q.tagName() != "arg" ) KIG_GENERIC_PARSE_ERROR;
+ int pid = q.text().toInt(&ok );
+ if ( !ok ) KIG_GENERIC_PARSE_ERROR;
+ parents.push_back( pid - 1 );
+ };
+ newnode = new ApplyTypeNode( type, parents );
+ }
+ else if ( tmp == "fetch-property" )
+ {
+ // FetchPropertyNode
+ QCString propname = e.attribute( "property" ).latin1();
+ QDomElement arge = e.firstChild().toElement();
+ int parent = arge.text().toInt( &ok );
+ if ( !ok ) KIG_GENERIC_PARSE_ERROR;
+ newnode = new FetchPropertyNode( parent - 1, propname );
+ }
+ else
+ {
+ // PushStackNode
+ if ( e.attribute( "action" ) != "push" ) KIG_GENERIC_PARSE_ERROR;
+ QString typen = e.attribute( "type" );
+ if ( typen.isNull() ) KIG_GENERIC_PARSE_ERROR;
+ ObjectImp* imp = ObjectImpFactory::instance()->deserialize( typen, e, error );
+ if ( ( ! imp ) && !error.isEmpty() ) return 0;
+ newnode = new PushStackNode( imp );
+ };
+ obhi->mnodes.resize( kMax( size_t(id - obhi->mnumberofargs), obhi->mnodes.size() ) );
+ obhi->mnodes[id - obhi->mnumberofargs - 1] = newnode;
+ };
+
+ // if we are here, all went fine
+ return obhi;
+}
+
+ArgsParser ObjectHierarchy::argParser() const
+{
+ std::vector<ArgsParser::spec> specs;
+ for ( uint i = 0; i < margrequirements.size(); ++i )
+ {
+ const ObjectImpType* req = margrequirements[i];
+ ArgsParser::spec spec;
+ spec.type = req;
+ spec.usetext = musetexts[i];
+ spec.selectstat = mselectstatements[i];
+ specs.push_back( spec );
+ };
+ return ArgsParser( specs );
+}
+
+std::vector<ObjectCalcer*> ObjectHierarchy::buildObjects( const std::vector<ObjectCalcer*>& os, const KigDocument& doc ) const
+{
+ assert( os.size() == mnumberofargs );
+ for ( uint i = 0; i < os.size(); ++i )
+ assert( os[i]->imp()->inherits( margrequirements[i] ) );
+
+ std::vector<ObjectCalcer*> stack;
+ stack.resize( mnodes.size() + mnumberofargs, 0 );
+ std::copy( os.begin(), os.end(), stack.begin() );
+
+ for( uint i = 0; i < mnodes.size(); ++i )
+ {
+ mnodes[i]->apply( stack, mnumberofargs + i );
+ stack[mnumberofargs + i]->calc( doc );
+ };
+
+ std::vector<ObjectCalcer*> ret( stack.end() - mnumberofresults, stack.end() );
+
+ return ret;
+}
+
+const ObjectImpType* ObjectHierarchy::idOfLastResult() const
+{
+ const Node* n = mnodes.back();
+ if ( n->id() == Node::ID_PushStack )
+ return static_cast<const PushStackNode*>( n )->imp()->type();
+ else if ( n->id() == Node::ID_FetchProp )
+ return ObjectImp::stype();
+ else
+ return static_cast<const ApplyTypeNode*>( n )->type()->resultId();
+}
+
+ObjectHierarchy ObjectHierarchy::transformFinalObject( const Transformation& t ) const
+{
+ assert( mnumberofresults == 1 );
+ ObjectHierarchy ret( *this );
+ ret.mnodes.push_back( new PushStackNode( new TransformationImp( t ) ) );
+
+ std::vector<int> parents;
+ parents.push_back( ret.mnodes.size() - 1);
+ parents.push_back( ret.mnodes.size() );
+ const ObjectType* type = ApplyTransformationObjectType::instance();
+ ret.mnodes.push_back( new ApplyTypeNode( type, parents ) );
+ return ret;
+}
+
+bool operator==( const ObjectHierarchy& lhs, const ObjectHierarchy& rhs )
+{
+ if ( ! ( lhs.mnumberofargs == rhs.mnumberofargs &&
+ lhs.mnumberofresults == rhs.mnumberofresults &&
+ lhs.margrequirements == rhs.margrequirements &&
+ lhs.mnodes.size() == rhs.mnodes.size() ) )
+ return false;
+
+ // this isn't entirely correct, but it will do, because we don't
+ // really want to know whether the hierarchies are different, but
+ // whether rhs has changed with regard to lhs..
+ for ( uint i = 0; i < lhs.mnodes.size(); ++i )
+ if ( lhs.mnodes[i] != lhs.mnodes[i] )
+ return false;
+
+ return true;
+}
+
+bool ObjectHierarchy::resultDoesNotDependOnGiven() const
+{
+ std::vector<bool> dependsstack( mnodes.size() + mnumberofargs, false );
+
+ for ( uint i = 0; i < mnumberofargs; ++i )
+ dependsstack[i] = true;
+ for ( uint i = 0; i < mnodes.size(); ++i )
+ mnodes[i]->checkDependsOnGiven( dependsstack, i + mnumberofargs );
+ for ( uint i = dependsstack.size() - mnumberofresults; i < dependsstack.size(); ++i )
+ if ( !dependsstack[i] )
+ return true;
+ return false;
+}
+
+// returns the "minimum" of a and b ( in the partially ordered set of
+// ObjectImpType's, using the inherits member function as comparison,
+// if you for some reason like this sort of non-sense ;) ). This
+// basically means: return the type that inherits the other type,
+// because if another type inherits the lowermost type, then it will
+// also inherit the other..
+const ObjectImpType* lowermost( const ObjectImpType* a, const ObjectImpType* b )
+{
+ if ( a->inherits( b ) ) return a;
+ assert( b->inherits( a ) );
+ return b;
+}
+
+// this function is part of the visit procedure really. It is
+// factored out, because it recurses for cache ObjectImp's. What this
+// does is, it makes sure that object o is calcable, by putting
+// appropriate Node's in mnodes.. po is o->parents() and pl contains
+// the location of objects that are already in mnodes and -1
+// otherwise.. -1 means we have to store their ObjectImp, unless
+// they're cache ObjectImp's etc.
+int ObjectHierarchy::storeObject( const ObjectCalcer* o, const std::vector<ObjectCalcer*>& po, std::vector<int>& pl,
+ std::map<const ObjectCalcer*, int>& seenmap )
+{
+ for ( uint i = 0; i < po.size(); ++i )
+ {
+ if ( pl[i] == -1 )
+ {
+ // we can't store cache ObjectImp's..
+ if ( po[i]->imp()->isCache() )
+ {
+ pl[i] = visit( po[i], seenmap, true, false );
+ }
+ else
+ {
+ Node* argnode = new PushStackNode( po[i]->imp()->copy() );
+ mnodes.push_back( argnode );
+ int argloc = mnumberofargs + mnodes.size() - 1;
+ seenmap[po[i]] = argloc;
+ pl[i] = argloc;
+ };
+ }
+ else if ( (uint) pl[i] < mnumberofargs )
+ {
+ ObjectCalcer* parent = o->parents()[i];
+ std::vector<ObjectCalcer*> opl = o->parents();
+
+ margrequirements[pl[i]] =
+ lowermost( margrequirements[pl[i]],
+ o->impRequirement( parent, opl ) );
+ musetexts[pl[i]] = margrequirements[pl[i]]->selectStatement();
+ };
+ };
+ if ( dynamic_cast<const ObjectTypeCalcer*>( o ) )
+ mnodes.push_back( new ApplyTypeNode( static_cast<const ObjectTypeCalcer*>( o )->type(), pl ) );
+ else if ( dynamic_cast<const ObjectPropertyCalcer*>( o ) )
+ {
+ assert( pl.size() == 1 );
+ int parent = pl.front();
+ ObjectCalcer* op = po.front();
+ assert( op );
+ uint propid = static_cast<const ObjectPropertyCalcer*>( o )->propId();
+ assert( propid < op->imp()->propertiesInternalNames().size() );
+ mnodes.push_back( new FetchPropertyNode( parent, op->imp()->propertiesInternalNames()[propid], propid ) );
+ }
+ else
+ assert( false );
+ seenmap[o] = mnumberofargs + mnodes.size() - 1;
+ return mnumberofargs + mnodes.size() - 1;
+}
+
+ObjectHierarchy::ObjectHierarchy( const ObjectCalcer* from, const ObjectCalcer* to )
+{
+ std::vector<ObjectCalcer*> fromv;
+ fromv.push_back( const_cast<ObjectCalcer*>( from ) );
+ std::vector<ObjectCalcer*> tov;
+ tov.push_back( const_cast<ObjectCalcer*>( to ) );
+ init( fromv, tov );
+}
+
+bool ObjectHierarchy::allGivenObjectsUsed() const
+{
+ std::vector<bool> usedstack( mnodes.size() + mnumberofargs, false );
+ for ( uint i = mnodes.size() - mnumberofresults; i < mnodes.size(); ++i )
+ usedstack[i + mnumberofargs] = true;
+ for ( int i = mnodes.size() - 1; i >= 0; --i )
+ if ( usedstack[i + mnumberofargs] )
+ mnodes[i]->checkArgumentsUsed( usedstack );
+ for ( uint i = 0; i < mnumberofargs; ++i )
+ if ( ! usedstack[i] ) return false;
+ return true;
+}
+