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DocumentObject.cpp
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DocumentObject.cpp
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/***************************************************************************
* Copyright (c) Jürgen Riegel (juergen.riegel@web.de) *
* *
* This file is part of the FreeCAD CAx development system. *
* *
* 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., 59 Temple Place, *
* Suite 330, Boston, MA 02111-1307, USA *
* *
***************************************************************************/
#include "PreCompiled.h"
#ifndef _PreComp_
#endif
#include <Base/Writer.h>
#include "Document.h"
#include "DocumentObject.h"
#include "DocumentObjectGroup.h"
#include "PropertyLinks.h"
#include "PropertyExpressionEngine.h"
#include "DocumentObjectExtension.h"
#include <App/DocumentObjectPy.h>
#include <boost/signals/connection.hpp>
#include <boost/bind.hpp>
using namespace App;
PROPERTY_SOURCE(App::DocumentObject, App::TransactionalObject)
DocumentObjectExecReturn *DocumentObject::StdReturn = 0;
//===========================================================================
// DocumentObject
//===========================================================================
DocumentObject::DocumentObject(void)
: ExpressionEngine(),_pDoc(0),pcNameInDocument(0)
{
// define Label of type 'Output' to avoid being marked as touched after relabeling
ADD_PROPERTY_TYPE(Label,("Unnamed"),"Base",Prop_Output,"User name of the object (UTF8)");
ADD_PROPERTY_TYPE(ExpressionEngine,(),"Base",Prop_Hidden,"Property expressions");
}
DocumentObject::~DocumentObject(void)
{
if (!PythonObject.is(Py::_None())){
// Remark: The API of Py::Object has been changed to set whether the wrapper owns the passed
// Python object or not. In the constructor we forced the wrapper to own the object so we need
// not to dec'ref the Python object any more.
// But we must still invalidate the Python object because it need not to be
// destructed right now because the interpreter can own several references to it.
Base::PyObjectBase* obj = (Base::PyObjectBase*)PythonObject.ptr();
// Call before decrementing the reference counter, otherwise a heap error can occur
obj->setInvalid();
}
}
namespace App {
class ObjectExecution
{
public:
ObjectExecution(DocumentObject* o) : obj(o)
{ obj->StatusBits.set(3); }
~ObjectExecution()
{ obj->StatusBits.reset(3); }
private:
DocumentObject* obj;
};
}
App::DocumentObjectExecReturn *DocumentObject::recompute(void)
{
// set/unset the execution bit
ObjectExecution exe(this);
return this->execute();
}
DocumentObjectExecReturn *DocumentObject::execute(void)
{
//call all extensions
auto vector = getExtensionsDerivedFromType<App::DocumentObjectExtension>();
for(auto ext : vector) {
if(ext->extensionMustExecute())
ext->extensionExecute();
}
return StdReturn;
}
bool DocumentObject::recomputeFeature()
{
Document* doc = this->getDocument();
if (doc)
doc->recomputeFeature(this);
return isValid();
}
short DocumentObject::mustExecute(void) const
{
if(isTouched())
return 1;
//ask all extensions
auto vector = getExtensionsDerivedFromType<App::DocumentObjectExtension>();
for(auto ext : vector) {
if(ext->extensionMustExecute())
return 1;
}
return 0;
}
const char* DocumentObject::getStatusString(void) const
{
if (isError()) {
const char* text = getDocument()->getErrorDescription(this);
return text ? text : "Error";
}
else if (isTouched())
return "Touched";
else
return "Valid";
}
const char *DocumentObject::getNameInDocument(void) const
{
// Note: It can happen that we query the internal name of an object even if it is not
// part of a document (anymore). This is the case e.g. if we have a reference in Python
// to an object that has been removed from the document. In this case we should rather
// return 0.
//assert(pcNameInDocument);
if (!pcNameInDocument) return 0;
return pcNameInDocument->c_str();
}
bool DocumentObject::isAttachedToDocument() const
{
return (pcNameInDocument != 0);
}
const char* DocumentObject::detachFromDocument()
{
const std::string* name = pcNameInDocument;
pcNameInDocument = 0;
return name ? name->c_str() : 0;
}
std::vector<DocumentObject*> DocumentObject::getOutList(void) const
{
std::vector<Property*> List;
std::vector<DocumentObject*> ret;
getPropertyList(List);
for (std::vector<Property*>::const_iterator It = List.begin();It != List.end(); ++It) {
if ((*It)->isDerivedFrom(PropertyLinkList::getClassTypeId())) {
const std::vector<DocumentObject*> &OutList = static_cast<PropertyLinkList*>(*It)->getValues();
for (std::vector<DocumentObject*>::const_iterator It2 = OutList.begin();It2 != OutList.end(); ++It2) {
if (*It2)
ret.push_back(*It2);
}
}
else if ((*It)->isDerivedFrom(PropertyLinkSubList::getClassTypeId())) {
const std::vector<DocumentObject*> &OutList = static_cast<PropertyLinkSubList*>(*It)->getValues();
for (std::vector<DocumentObject*>::const_iterator It2 = OutList.begin();It2 != OutList.end(); ++It2) {
if (*It2)
ret.push_back(*It2);
}
}
else if ((*It)->isDerivedFrom(PropertyLink::getClassTypeId())) {
if (static_cast<PropertyLink*>(*It)->getValue())
ret.push_back(static_cast<PropertyLink*>(*It)->getValue());
}
else if ((*It)->isDerivedFrom(PropertyLinkSub::getClassTypeId())) {
if (static_cast<PropertyLinkSub*>(*It)->getValue())
ret.push_back(static_cast<PropertyLinkSub*>(*It)->getValue());
}
}
// Get document objects that this document object relies on
ExpressionEngine.getDocumentObjectDeps(ret);
return ret;
}
std::vector<App::DocumentObject*> DocumentObject::getInList(void) const
{
if (_pDoc)
return _pDoc->getInList(this);
else
return std::vector<App::DocumentObject*>();
}
DocumentObjectGroup* DocumentObject::getGroup() const
{
return dynamic_cast<DocumentObjectGroup*>(GroupExtension::getGroupOfObject(this));
}
bool DocumentObject::testIfLinkDAGCompatible(DocumentObject *linkTo) const
{
std::vector<App::DocumentObject*> linkTo_in_vector;
linkTo_in_vector.push_back(linkTo);
return this->testIfLinkDAGCompatible(linkTo_in_vector);
}
bool DocumentObject::testIfLinkDAGCompatible(const std::vector<DocumentObject *> &linksTo) const
{
Document* doc = this->getDocument();
if (!doc)
throw Base::Exception("DocumentObject::testIfLinkIsDAG: object is not in any document.");
std::vector<App::DocumentObject*> deplist = doc->getDependencyList(linksTo);
if( std::find(deplist.begin(),deplist.end(),this) != deplist.end() )
//found this in dependency list
return false;
else
return true;
}
bool DocumentObject::testIfLinkDAGCompatible(PropertyLinkSubList &linksTo) const
{
const std::vector<App::DocumentObject*> &linksTo_in_vector = linksTo.getValues();
return this->testIfLinkDAGCompatible(linksTo_in_vector);
}
bool DocumentObject::testIfLinkDAGCompatible(PropertyLinkSub &linkTo) const
{
std::vector<App::DocumentObject*> linkTo_in_vector;
linkTo_in_vector.reserve(1);
linkTo_in_vector.push_back(linkTo.getValue());
return this->testIfLinkDAGCompatible(linkTo_in_vector);
}
void DocumentObject::onLostLinkToObject(DocumentObject*)
{
}
App::Document *DocumentObject::getDocument(void) const
{
return _pDoc;
}
void DocumentObject::setDocument(App::Document* doc)
{
_pDoc=doc;
onSettingDocument();
}
void DocumentObject::onBeforeChange(const Property* prop)
{
// Store current name in oldLabel, to be able to easily retrieve old name of document object later
// when renaming expressions.
if (prop == &Label)
oldLabel = Label.getStrValue();
if (_pDoc)
onBeforeChangeProperty(_pDoc, prop);
}
/// get called by the container when a Property was changed
void DocumentObject::onChanged(const Property* prop)
{
if (_pDoc)
_pDoc->onChangedProperty(this,prop);
if (prop == &Label && _pDoc && oldLabel != Label.getStrValue())
_pDoc->signalRelabelObject(*this);
if (prop->getType() & Prop_Output)
return;
// set object touched
StatusBits.set(0);
}
PyObject *DocumentObject::getPyObject(void)
{
if (PythonObject.is(Py::_None())) {
// ref counter is set to 1
PythonObject = Py::Object(new DocumentObjectPy(this),true);
}
return Py::new_reference_to(PythonObject);
}
std::vector<PyObject *> DocumentObject::getPySubObjects(const std::vector<std::string>&) const
{
// default implementation returns nothing
return std::vector<PyObject *>();
}
void DocumentObject::touch(void)
{
StatusBits.set(0);
}
/**
* @brief Check whether the document object is touched or not.
* @return true if document object is touched, false if not.
*/
bool DocumentObject::isTouched() const
{
return ExpressionEngine.isTouched() || StatusBits.test(0);
}
void DocumentObject::Save (Base::Writer &writer) const
{
writer.ObjectName = this->getNameInDocument();
App::PropertyContainer::Save(writer);
}
/**
* @brief Associate the expression \expr with the object identifier \a path in this document object.
* @param path Target object identifier for the result of the expression
* @param expr Expression tree
* @param comment Optional comment describing the expression
*/
void DocumentObject::setExpression(const ObjectIdentifier &path, boost::shared_ptr<Expression> expr, const char * comment)
{
ExpressionEngine.setValue(path, expr, comment);
connectRelabelSignals();
}
/**
* @brief Get expression information associated with \a path.
* @param path Object identifier
* @return Expression info, containing expression and optional comment.
*/
const PropertyExpressionEngine::ExpressionInfo DocumentObject::getExpression(const ObjectIdentifier &path) const
{
boost::any value = ExpressionEngine.getPathValue(path);
if (value.type() == typeid(PropertyExpressionEngine::ExpressionInfo))
return boost::any_cast<PropertyExpressionEngine::ExpressionInfo>(value);
else
return PropertyExpressionEngine::ExpressionInfo();
}
/**
* @brief Invoke ExpressionEngine's renameObjectIdentifier, to possibly rewrite expressions using
* the \a paths map with current and new identifiers.
*
* @param paths
*/
void DocumentObject::renameObjectIdentifiers(const std::map<ObjectIdentifier, ObjectIdentifier> &paths)
{
ExpressionEngine.renameObjectIdentifiers(paths);
}
/**
* @brief Helper function that sets up a signal to track document object renames.
*/
void DocumentObject::connectRelabelSignals()
{
// Only keep signal if the ExpressionEngine has at least one expression
if (ExpressionEngine.numExpressions() > 0) {
// Not already connected?
if (!onRelabledObjectConnection.connected())
onRelabledObjectConnection = getDocument()->signalRelabelObject.connect(boost::bind(&PropertyExpressionEngine::slotObjectRenamed, &ExpressionEngine, _1));
// Connect to signalDeletedObject, to properly track deletion of other objects that might be referenced in an expression
if (!onDeletedObjectConnection.connected())
onDeletedObjectConnection = getDocument()->signalDeletedObject.connect(boost::bind(&PropertyExpressionEngine::slotObjectDeleted, &ExpressionEngine, _1));
try {
// Crude method to resolve all expression dependencies
ExpressionEngine.execute();
}
catch (...) {
// Ignore any error
}
}
else {
// Disconnect signals; nothing to track now
onRelabledObjectConnection.disconnect();
onRelabledDocumentConnection.disconnect();
onDeletedObjectConnection.disconnect();
}
}
void DocumentObject::onSettingDocument()
{
//call all extensions
auto vector = getExtensionsDerivedFromType<App::DocumentObjectExtension>();
for(auto ext : vector)
ext->onExtendedSettingDocument();
}
void DocumentObject::setupObject()
{
//call all extensions
auto vector = getExtensionsDerivedFromType<App::DocumentObjectExtension>();
for(auto ext : vector)
ext->onExtendedSetupObject();
}
void DocumentObject::unsetupObject()
{
//call all extensions
auto vector = getExtensionsDerivedFromType<App::DocumentObjectExtension>();
for(auto ext : vector)
ext->onExtendedUnsetupObject();
}