C++ XMLReader::readElement方法代码示例

void PropertyLinkSubList::Restore(Base::XMLReader &reader)
{
    // read my element
    reader.readElement("LinkSubList");
    // get the value of my attribute
    int count = reader.getAttributeAsInteger("count");

    std::vector<DocumentObject*> values;
    values.reserve(count);
    std::vector<std::string> SubNames;
    SubNames.reserve(count);
    for (int i = 0; i < count; i++) {
        reader.readElement("Link");
        std::string name = reader.getAttribute("obj");
        // In order to do copy/paste it must be allowed to have defined some
        // referenced objects in XML which do not exist anymore in the new
        // document. Thus, we should silently ignore this.
        // Property not in an object!
        DocumentObject* father = static_cast<DocumentObject*>(getContainer());
        App::Document* document = father->getDocument();
        DocumentObject* child = document ? document->getObject(name.c_str()) : 0;
        if (child)
            values.push_back(child);
        else if (reader.isVerbose())
            Base::Console().Warning("Lost link to '%s' while loading, maybe "
                                    "an object was not loaded correctly\n",name.c_str());
        std::string subName = reader.getAttribute("sub");
        SubNames.push_back(subName);
    }

    reader.readEndElement("LinkSubList");

    // assignment
    setValues(values,SubNames);
}

void PropertyRowHeights::Restore(Base::XMLReader &reader)
{
    int Cnt;

    // Row info
    reader.readElement("RowInfo");
    Cnt = reader.hasAttribute("Count") ? reader.getAttributeAsInteger("Count") : 0;
    for (int i = 0; i < Cnt; i++) {
        reader.readElement("Row");
        const char* name = reader.hasAttribute("name") ? reader.getAttribute("name") : 0;
        const char * height = reader.hasAttribute("height") ? reader.getAttribute("height") : 0;

        try {
            if (name && height) {
                int row = App::decodeRow(name);
                int rowHeight = atoi(height);

                setValue(row, rowHeight);
            }
        }
        catch (...) {
            // Something is wrong, skip this row
        }
    }
    reader.readEndElement("RowInfo");
}

void Chamfer::Restore(Base::XMLReader &reader)
{
    reader.readElement("Properties");
    int Cnt = reader.getAttributeAsInteger("Count");

    for (int i=0 ;i<Cnt ;i++) {
        reader.readElement("Property");
        const char* PropName = reader.getAttribute("name");
        const char* TypeName = reader.getAttribute("type");
        App::Property* prop = getPropertyByName(PropName);

        try {
            if (prop && strcmp(prop->getTypeId().getName(), TypeName) == 0) {
                prop->Restore(reader);
            }
            else if (prop && strcmp(TypeName,"App::PropertyFloatConstraint") == 0 &&
                     strcmp(prop->getTypeId().getName(), "App::PropertyQuantityConstraint") == 0) {
                App::PropertyFloatConstraint p;
                p.Restore(reader);
                static_cast<App::PropertyQuantityConstraint*>(prop)->setValue(p.getValue());
            }
        }
        catch (const Base::XMLParseException&) {
            throw; // re-throw
        }
        catch (const Base::Exception &e) {
            Base::Console().Error("%s\n", e.what());
        }
        catch (const std::exception &e) {
            Base::Console().Error("%s\n", e.what());
        }
        reader.readEndElement("Property");
    }
    reader.readEndElement("Properties");
}

void DynamicProperty::Restore(Base::XMLReader &reader)
{
    reader.readElement("Properties");
    int Cnt = reader.getAttributeAsInteger("Count");

    for (int i=0 ;i<Cnt ;i++) {
        reader.readElement("Property");
        const char* PropName = reader.getAttribute("name");
        const char* TypeName = reader.getAttribute("type");
        Property* prop = getPropertyByName(PropName);
        try {
            if (!prop) {
                short attribute = 0;
                bool readonly = false, hidden = false;
                const char *group=0, *doc=0, *attr=0, *ro=0, *hide=0;
                if (reader.hasAttribute("group"))
                    group = reader.getAttribute("group");
                if (reader.hasAttribute("doc"))
                    doc = reader.getAttribute("doc");
                if (reader.hasAttribute("attr")) {
                    attr = reader.getAttribute("attr");
                    if (attr) attribute = attr[0]-48;
                }
                if (reader.hasAttribute("ro")) {
                    ro = reader.getAttribute("ro");
                    if (ro) readonly = (ro[0]-48) != 0;
                }
                if (reader.hasAttribute("hide")) {
                    hide = reader.getAttribute("hide");
                    if (hide) hidden = (hide[0]-48) != 0;
                }
                prop = addDynamicProperty(TypeName, PropName, group, doc, attribute, readonly, hidden);
            }
        }
        catch(const Base::Exception& e) {
            // only handle this exception type
            Base::Console().Warning(e.what());
        }

        //NOTE: We must also check the type of the current property because a subclass of
        //PropertyContainer might change the type of a property but not its name. In this
        //case we would force to read-in a wrong property type and the behaviour would be
        //undefined.

        // Don't read transient properties
        if (!(getPropertyType(prop) & Prop_Transient)) {
            if (prop && strcmp(prop->getTypeId().getName(), TypeName) == 0)
                prop->Restore(reader);
            else if (prop)
                Base::Console().Warning("%s: Overread data for property %s of type %s, expected type is %s\n",
                    pc->getTypeId().getName(), prop->getName(), prop->getTypeId().getName(), TypeName);
            else
                Base::Console().Warning("%s: No property found with name %s and type %s\n",
                    pc->getTypeId().getName(), PropName, TypeName);
        }
        reader.readEndElement("Property");
    }

    reader.readEndElement("Properties");
}

void PropertyColumnWidths::Restore(Base::XMLReader &reader)
{
    int Cnt;

    // Column info
    reader.readElement("ColumnInfo");
    Cnt = reader.hasAttribute("Count") ? reader.getAttributeAsInteger("Count") : 0;
    for (int i = 0; i < Cnt; i++) {
        reader.readElement("Column");
        const char* name = reader.hasAttribute("name") ? reader.getAttribute("name") : 0;
        const char * width = reader.hasAttribute("width") ? reader.getAttribute("width") : 0;

        try {
            if (name && width) {
                int col = App::decodeColumn(name);
                int colWidth = atoi(width);

                setValue(col, colWidth);
            }
        }
        catch (...) {
            // Something is wrong, skip this column
        }

    }
    reader.readEndElement("ColumnInfo");
}

void Part2DObject::Restore(Base::XMLReader &reader)
{
    //override generic restoration to convert Support property from PropertyLinkSub to PropertyLinkSubList

    reader.readElement("Properties");
    int Cnt = reader.getAttributeAsInteger("Count");

    for (int i=0 ;i<Cnt ;i++) {
        reader.readElement("Property");
        const char* PropName = reader.getAttribute("name");
        const char* TypeName = reader.getAttribute("type");
        App::Property* prop = getPropertyByName(PropName);
        // NOTE: We must also check the type of the current property because a
        // subclass of PropertyContainer might change the type of a property but
        // not its name. In this case we would force to read-in a wrong property
        // type and the behaviour would be undefined.
        try {
            if(prop){
                if (strcmp(prop->getTypeId().getName(), TypeName) == 0){
                    prop->Restore(reader);
                } else if (prop->isDerivedFrom(App::PropertyLinkSubList::getClassTypeId())){
                    //reading legacy Support - when the Support could only be a single flat face.
                    App::PropertyLinkSub tmp;
                    if (0 == strcmp(tmp.getTypeId().getName(),TypeName)) {
                        tmp.setContainer(this);
                        tmp.Restore(reader);
                        static_cast<App::PropertyLinkSubList*>(prop)->setValue(tmp.getValue(), tmp.getSubValues());
                    }
                    this->MapMode.setValue(Attacher::mmFlatFace);
                }
            }
        }
        catch (const Base::XMLParseException&) {
            throw; // re-throw
        }
        catch (const Base::Exception &e) {
            Base::Console().Error("%s\n", e.what());
        }
        catch (const std::exception &e) {
            Base::Console().Error("%s\n", e.what());
        }
        catch (const char* e) {
            Base::Console().Error("%s\n", e);
        }
#ifndef FC_DEBUG
        catch (...) {
            Base::Console().Error("PropertyContainer::Restore: Unknown C++ exception thrown");
        }
#endif

        reader.readEndElement("Property");
    }
    reader.readEndElement("Properties");
}

void Primitive::Restore(Base::XMLReader &reader)
{
    reader.readElement("Properties");
    int Cnt = reader.getAttributeAsInteger("Count");

    for (int i=0 ;i<Cnt ;i++) {
        reader.readElement("Property");
        const char* PropName = reader.getAttribute("name");
        const char* TypeName = reader.getAttribute("type");
        App::Property* prop = getPropertyByName(PropName);
        // For #0001652 the property types of many primitive features have changed
        // from PropertyFloat or PropertyFloatConstraint to a more meaningful type.
        // In order to load older project files there must be checked in case the
        // types don't match if both inherit from PropertyFloat because all derived
        // classes do not re-implement the Save/Restore methods.
        try {
            if (prop && strcmp(prop->getTypeId().getName(), TypeName) == 0) {
                prop->Restore(reader);
            }
            else if (prop) {
                Base::Type inputType = Base::Type::fromName(TypeName);
                if (prop->getTypeId().isDerivedFrom(App::PropertyFloat::getClassTypeId()) &&
                    inputType.isDerivedFrom(App::PropertyFloat::getClassTypeId())) {
                    // Do not directly call the property's Restore method in case the implmentation
                    // has changed. So, create a temporary PropertyFloat object and assign the value.
                    App::PropertyFloat floatProp;
                    floatProp.Restore(reader);
                    static_cast<App::PropertyFloat*>(prop)->setValue(floatProp.getValue());
                }
            }
        }
        catch (const Base::XMLParseException&) {
            throw; // re-throw
        }
        catch (const Base::Exception &e) {
            Base::Console().Error("%s\n", e.what());
        }
        catch (const std::exception &e) {
            Base::Console().Error("%s\n", e.what());
        }
        catch (const char* e) {
            Base::Console().Error("%s\n", e);
        }
#ifndef FC_DEBUG
        catch (...) {
            Base::Console().Error("Primitive::Restore: Unknown C++ exception thrown");
        }
#endif

        reader.readEndElement("Property");
    }
    reader.readEndElement("Properties");
}

void Transformed::Restore(Base::XMLReader &reader)
{
    reader.readElement("Properties");
    int Cnt = reader.getAttributeAsInteger("Count");

    for (int i=0 ;i<Cnt ;i++) {
        reader.readElement("Property");
        const char* PropName = reader.getAttribute("name");
        const char* TypeName = reader.getAttribute("type");
        App::Property* prop = getPropertyByName(PropName);

        // The property 'Angle' of PolarPattern has changed from PropertyFloat
        // to PropertyAngle and the property 'Length' has changed to PropertyLength.
        try {
            if (prop && strcmp(prop->getTypeId().getName(), TypeName) == 0) {
                prop->Restore(reader);
            }
            else if (prop) {
                Base::Type inputType = Base::Type::fromName(TypeName);
                if (prop->getTypeId().isDerivedFrom(App::PropertyFloat::getClassTypeId()) &&
                    inputType.isDerivedFrom(App::PropertyFloat::getClassTypeId())) {
                    // Do not directly call the property's Restore method in case the implmentation
                    // has changed. So, create a temporary PropertyFloat object and assign the value.
                    App::PropertyFloat floatProp;
                    floatProp.Restore(reader);
                    static_cast<App::PropertyFloat*>(prop)->setValue(floatProp.getValue());
                }
            }
        }
        catch (const Base::XMLParseException&) {
            throw; // re-throw
        }
        catch (const Base::Exception &e) {
            Base::Console().Error("%s\n", e.what());
        }
        catch (const std::exception &e) {
            Base::Console().Error("%s\n", e.what());
        }
        catch (const char* e) {
            Base::Console().Error("%s\n", e);
        }
#ifndef FC_DEBUG
        catch (...) {
            Base::Console().Error("Primitive::Restore: Unknown C++ exception thrown");
        }
#endif

        reader.readEndElement("Property");
    }
    reader.readEndElement("Properties");
}

void PropertyMeshKernel::Restore(Base::XMLReader &reader)
{
    reader.readElement("Mesh");
    std::string file (reader.getAttribute("file") );
    
    if (file.empty()) {
        // read XML
        MeshCore::MeshKernel kernel;
        MeshCore::MeshInput restorer(kernel);
        restorer.LoadXML(reader);

        // avoid to duplicate the mesh in memory
        MeshCore::MeshPointArray points;
        MeshCore::MeshFacetArray facets;
        kernel.Adopt(points, facets);

        aboutToSetValue();
        _meshObject->getKernel().Adopt(points, facets);
        hasSetValue();
    } 
    else {
        // initate a file read
        reader.addFile(file.c_str(),this);
    }
}

void PropertyFloat::Restore(Base::XMLReader &reader)
{
    // read my Element
    reader.readElement("Float");
    // get the value of my Attribute
    setValue((float)reader.getAttributeAsFloat("value"));
}

void PropertyFileIncluded::Restore(Base::XMLReader &reader)
{
    reader.readElement("FileIncluded");
    if (reader.hasAttribute("file")) {
        string file (reader.getAttribute("file") );
        if (!file.empty()) {
            // initate a file read
            reader.addFile(file.c_str(),this);
            // is in the document transient path
            aboutToSetValue();
            _cValue = getDocTransientPath() + "/" + file;
            _BaseFileName = file;
            hasSetValue();
        }
    }
    // section is XML stream
    else if (reader.hasAttribute("data")) {
        string file (reader.getAttribute("data") );
        if (!file.empty()) {
            // is in the document transient path
            aboutToSetValue();
            _cValue = getDocTransientPath() + "/" + file;
            reader.readBinFile(_cValue.c_str());
            reader.readEndElement("FileIncluded");
            _BaseFileName = file;
            hasSetValue();
        }
    }
}

void PropertyConstraintList::Restore(Base::XMLReader &reader)
{
    // read my element
    reader.readElement("ConstraintList");
    // get the value of my attribute
    int count = reader.getAttributeAsInteger("count");

    std::vector<Constraint*> values;
    values.reserve(count);
    for (int i = 0; i < count; i++) {
        Constraint *newC = new Constraint();
        newC->Restore(reader);
        // To keep upward compatibility ignore unknown constraint types
        if (newC->Type < Sketcher::NumConstraintTypes) {
            values.push_back(newC);
        }
        else {
            // reading a new constraint type which this version cannot handle
            delete newC;
        }
    }

    reader.readEndElement("ConstraintList");

    // assignment
    setValues(values);
    for (Constraint* it : values)
        delete it;
}

void PropertyExpressionEngine::Restore(Base::XMLReader &reader)
{
    reader.readElement("ExpressionEngine");

    int count = reader.getAttributeAsFloat("count");

    for (int i = 0; i < count; ++i) {
        DocumentObject * docObj = freecad_dynamic_cast<DocumentObject>(getContainer());

        reader.readElement("Expression");
        ObjectIdentifier path = ObjectIdentifier::parse(docObj, reader.getAttribute("path"));
        boost::shared_ptr<Expression> expression(ExpressionParser::parse(docObj, reader.getAttribute("expression")));
        const char * comment = reader.hasAttribute("comment") ? reader.getAttribute("comment") : 0;

        setValue(path, expression, comment);
    }

    reader.readEndElement("ExpressionEngine");
}

void PropertyGreyValueList::Restore(Base::XMLReader &reader)
{
    reader.readElement("FloatList");
    string file (reader.getAttribute("file") );

    if (!file.empty()) {
        // initate a file read
        reader.addFile(file.c_str(),this);
    }
}

void PropertyFilletEdges::Restore(Base::XMLReader &reader)
{
    reader.readElement("FilletEdges");
    std::string file (reader.getAttribute("file") );

    if (!file.empty()) {
        // initate a file read
        reader.addFile(file.c_str(),this);
    }
}