[Vala] libxml-2.0: tree and xpath API bindings

[Ondřej Jirman <megous megous com>]

Here is patch that updates libxml-2.0 bindings to add tree and xpath
API. It requires [Instance(position = n)] patch that I sent yesterday.

        o.j.


Sample code:

using Xml;

namespace test {
        static int main (string[] args) {
                Xml.init();

                /* build doc */
                var d = new Doc();
                var _r = new Node(null, "root");
                weak Ns ns = _r.new_ns("http://localhost/myns.dtd";,
                                       "myns");
                weak Node r = _r;
                d.set_root_element(#_r);

                /* add nodes */
                r.new_child(null, "title", "Hi!");

                weak Node a = r.new_child(null, "attrs_test");
                a.set_prop("t1", "value of t1");
                a.set_ns_prop(ns, "t2", "value of t2 with ns");

                weak Node c = r.new_child(ns, "node_with_child");
                c.new_child(null, "child", "Child text!");

                /* test xmlChar* is freed properly and that string
                   methods can be used */
                xmlstring mem;
                int len;
                d.dump_memory_format(out mem, ref len, true);
                GLib.stdout.printf("len = %d\nstrlen = %d\n\n%s\n", len,
                                   mem.size(), mem);

                /* test default args */
                mem = null;
                d.dump_memory_format(out mem);
                GLib.stdout.printf("\n%s\n", mem);

                /* test save */
                d.save_file("test.xml");
                d.save_file_format("test-formatted.xml", true);

                /* test Instance(position = 2) */
                d.save_file_enc_format("test-formatted-encoded.xml",
                                       "UTF-8", true);

                d.set_compress_mode(1);
                d.save_file_format("test-formatted-encoded.xml.gz");

                /* parse doc */
                var d2 = new Doc.read_text_len(mem, len, null, null,
                                               ParserOption.NOERROR |
                                               ParserOption.NOWARNING |
                                               ParserOption.NONET);
                if (d2 == null)
                        return 1;

                weak Node root = d2.get_root_element();
                for (weak Node iter = root.children; iter != null; 
                     iter = iter.next)
                {
                        GLib.stdout.printf("node %s\n",
                                           iter.get_path());
                }

                /* xpath */

                var ctx = new XPathContext(d2);
                d2.order_elements();
                var o = ctx.eval("//attrs_test");
                if (o != null && o.type == XPathObjectType.NODESET)
                {
                        GLib.stdout.printf("got %d nodes\n",
                                           o.nodeset.length());
                        for (int i = 0; i < o.nodeset.length(); i++)
                                GLib.stdout.printf("  -> %s\n",
                                  o.nodeset.item(i).get_path());
                }

                Xml.cleanup();
                return 0;
        }
}

Attachment: 0001-libxml-2.0.vapi-add-tree-and-xpath-API-bindings.patch
Description: application/mbox

Attachment: test.vala
Description: Text Data