C++ Element::node_begin方法代码示例

static void showElement(Xml::Element elt, const String& indent="") {
    cout << indent << "ELEMENT WITH TAG '" << elt.getElementTag() << "':\n";

    // Show attributes
    Xml::attribute_iterator ap = elt.attribute_begin();
    for (; ap != elt.attribute_end(); ++ap)
        cout << indent << "  ATTR '" << ap->getName() << "'='" 
             << ap->getValue() << "'\n";

    // Show all contents
    Xml::node_iterator p = elt.node_begin();
    for (; p != elt.node_end(); ++p) {
        cout << indent << p->getNodeTypeAsString() << endl;
        if (p->getNodeType() == Xml::ElementNode)
            showElement(Xml::Element::getAs(*p), indent + "  ");
    }
    cout << indent << "END OF ELEMENT.\n";
}

void testXmlFromScratch() {
    Xml::Document scratch;
    scratch.setRootTag("MyDoc");
    cout << scratch;

    Xml::Comment c("This is a comment.");
    Xml::Unknown u("!GODONLY knows what this is!!");
    Xml::Text t("This is some\ntext on two lines with trailing blanks   ");
    Xml::Element e("elementTag");

    // We're never going to use this one so its heap space will
    // leak if we don't explicitly call clearOrphan().
    Xml::Element neverMind("neverMind");

    cout << "initially e='" << e.getValue() << "'" << endl;
    e.updValue() += "AVALUE:";
    cout << "then e='" << e.getValue() << "'" << endl;

    e.setAttributeValue("attr1", String(Vec2(9,-9)));

    cout << "attr1 is " << e.getRequiredAttributeValueAs<Vec2>("attr1") << endl;

    cout << "isOrphan? " << String(c.isOrphan()) << ":" << c;
    cout << "isOrphan? " << String(u.isOrphan()) << ":" << u;
    cout << "isOrphan? " << String(t.isOrphan()) << ":" << t;
    cout << "isOrphan? " << String(e.isOrphan()) << ":" << e;

    e.setValue("this is the only value");
    e.updValue() += " (but then I added this)";
    cout << "e value=" << e.getValue() << endl;
    cout << "e = " << e << endl;
    e.setValue("9 10 -3.2e-4");
    cout << "e value=" << e.getValueAs< Array_<float> >() << endl;
    cout << "e = " << e << endl;

    scratch.insertTopLevelNodeAfter(scratch.node_begin(), c);
    cout << "isOrphan? " << String(c.isOrphan()) << ":" << c;
    cout << scratch;

    scratch.insertTopLevelNodeBefore(scratch.node_begin(Xml::ElementNode), u);
    cout << "isOrphan? " << String(u.isOrphan()) << ":" << u;
    cout << scratch;

    scratch.insertTopLevelNodeBefore(scratch.node_begin(), 
        Xml::Comment("This should be at the top of the file, except declaration."));
    cout << scratch;

    Xml::Document scratch2;
    scratch2 = scratch; // deep copy

    scratch.eraseTopLevelNode(scratch.node_begin());
    cout << "First node gone (scratch)?\n" << scratch;
    cout << "First node still there (scratch2)?\n" << scratch2;

    Xml::Element e2("anotherElt", Vec3(.1,.2,.3));
    cout << e2;
    e.insertNodeAfter(e.element_end(), e2);
    cout << "now owns anotherElt:\n" << e;

    Xml::Element root = scratch.getRootElement();
    root.insertNodeAfter(root.node_begin(), e);
    cout << scratch;

    scratch.setIndentString("..");
    cout << scratch;

    Xml::Element ecopy = e.clone();
    ecopy.setElementTag("elementTagCopy");
    cout << "COPY of e: " << ecopy;

    //scratch.writeToFile("scratch.xml");

    e.eraseNode(e.element_begin("anotherElt"));
    cout << "in-place removal of anotherElt from e: " << scratch;
    cout << "COPY of e: " << ecopy;

    root.insertNodeAfter(root.element_begin("elementTag"), ecopy);
    cout << "After copy insert, scratch=" << scratch;

    Xml::Node extract = root.removeNode(root.element_begin("elementTagCopy"));
    cout << "Extracted copy: " << extract << endl;
    cout << "Now scratch=" << scratch << endl;
    cout << "Duplicate scratch=" << Xml::Document(scratch) << endl;

    neverMind.clearOrphan();
}

void testXmlFromString() {
    Xml::Document fromString;
    fromString.readFromString(xmlJustAComment);
    cout << "Just a comment: '" << fromString << "'\n";

    fromString.readFromString(xmlPlainTextFile);
    cout << "Plain text file: '" << fromString << "'\n";

    // Note that the "condense white space" setting is global, not 
    // document-specific.
    Xml::Document preserveWhite;
    Xml::Document::setXmlCondenseWhiteSpace(false);
    SimTK_TEST(!Xml::Document::isXmlWhiteSpaceCondensed());
    preserveWhite.readFromString(xmlPlainTextFile);
    cout << "Plain text file with white space preserved (raw): " 
         << preserveWhite.getRootElement().getValue() << "\n";
    cout << "... (formatted with condense=false): " 
         << preserveWhite << "\n";    
    Xml::Document::setXmlCondenseWhiteSpace(true);
    cout << "... (formatted with condense=true): " 
         << preserveWhite << "\n";    

    SimTK_TEST_MUST_THROW(fromString.readFromString(xmlEmpty));
    SimTK_TEST_MUST_THROW(fromString.readFromString(xmlUnclosedComment));

    fromString.readFromString(String(xmlPainting));
    cout << "Painting: '" << fromString << "'\n";

    cout << "Doc type is: " << fromString.getRootTag() << endl;
    cout << "  version: " << fromString.getXmlVersion() << endl;
    cout << "  encoding: " << fromString.getXmlEncoding() << endl;
    cout << "  standalone: " 
         << String(fromString.getXmlIsStandalone() ? "yes" : "no") << endl;

    cout << "All nodes in doc:\n";
    Xml::node_iterator np = fromString.node_begin();
    for (; np != fromString.node_end(); ++np)
        cout << "  " << np->getNodeTypeAsString() << endl;


    Xml::Element root = fromString.getRootElement();

    cout << "hasNode()=" << root.hasNode() << endl;
    cout << "hasNode(Comment)=" << root.hasNode(Xml::CommentNode) << endl;
    cout << "hasNode(Unknown)=" << root.hasNode(Xml::UnknownNode) << endl;

    showElement(root);

    Xml::node_iterator p = root.node_begin(Xml::NoJunkNodes);
    for (; p != root.node_end(); ++p)
        cout << p->getNodeTypeAsString() << endl;

    cout << "Caption elements:\n";
    Xml::element_iterator ep(root.element_begin("caption"));
    for (; ep != root.element_end(); ++ep)
        cout << ep->getNodeTypeAsString() << ": <" << ep->getElementTag() 
             << ">" << endl;

    cout << "All elements:\n";
    Array_<Xml::Element> all = root.getAllElements();
    for (unsigned i=0; i < all.size(); ++i)
        cout << "<" << all[i].getElementTag() << ">" << endl;


    Array_<Xml::Node> allNodes(root.node_begin(Xml::NoJunkNodes), 
                               root.node_end());
    for (unsigned i=0; i < allNodes.size(); ++i)
        cout << "Node " << allNodes[i].getNodeTypeAsString() << endl;

    String prettyString, compactString;
    fromString.writeToString(prettyString);
    cout << "String pretty: " << prettyString.size() 
         << "\n'" << prettyString << "'\n";

    fromString.writeToString(compactString, true); // compact
    cout << "String compact: " << compactString.size() 
         << "\n'" << compactString << "'\n";

    SimTK_TEST(compactString.size() < prettyString.size());

    cout << "painting.allNode=" << root.getRequiredElement("painting")
                                        .getAllNodes() << endl;
    cout << "painting.img.allAttr=" << 
        root.getRequiredElement("painting").getRequiredElement("img")
        .getAllAttributes() << endl;
    //fromString.writeToFile("TestXml.xml");

    //Xml ex("TestXml.xml");
    //cout << "Document tag: " << ex.getDocumentTag() << endl;
    //for (Xml::nodu;e_iterator xp=ex.node_begin(); xp != ex.node_end(); ++xp)
    //    cout << "Node type: " << xp->getNodeTypeAsString() << endl;

    //PolygonalMesh mesh;
    //mesh.loadVtpFile("arm_r_humerus.vtp");
    //cout << "num vertices=" << mesh.getNumVertices() << " faces="
    //    << mesh.getNumFaces() << endl;
}