1 files changed, 80 insertions, 0 deletions
diff --git a/vala-xmpp/src/core/namespace_state.vala b/vala-xmpp/src/core/namespace_state.vala
new file mode 100644
index 00000000..e71607fa
--- /dev/null
+++ b/vala-xmpp/src/core/namespace_state.vala
@@ -0,0 +1,80 @@
+using Gee;
+
+namespace Xmpp.Core {
+public class NamespaceState {
+    private HashMap<string, string> uri_to_name = new HashMap<string, string> ();
+    private HashMap<string, string> name_to_uri = new HashMap<string, string> ();
+    public string current_ns_uri;
+
+    public NamespaceState () {
+        add_assoc(XMLNS_URI, "xmlns");
+        add_assoc("http://www.w3.org/XML/1998/namespace", "xml");
+        current_ns_uri = "http://www.w3.org/XML/1998/namespace";
+    }
+
+    public NamespaceState.for_stanza () {
+        this();
+        add_assoc("http://etherx.jabber.org/streams", "stream");
+        current_ns_uri = "jabber:client";
+    }
+
+    public NamespaceState.copy (NamespaceState old) {
+        foreach (string key in old.uri_to_name.keys) {
+            add_assoc(key, old.uri_to_name[key]);
+        }
+        set_current(old.current_ns_uri);
+    }
+
+    public NamespaceState.with_assoc (NamespaceState old, string ns_uri, string name) {
+        this.copy(old);
+        add_assoc(ns_uri, name);
+    }
+
+    public NamespaceState.with_current (NamespaceState old, string current_ns_uri) {
+        this.copy(old);
+        set_current(current_ns_uri);
+    }
+
+    public void add_assoc (string ns_uri, string name) {
+        name_to_uri[name] = ns_uri;
+        uri_to_name[ns_uri] = name;
+    }
+
+    public void set_current (string current_ns_uri) {
+        this.current_ns_uri = current_ns_uri;
+    }
+
+    public string find_name (string ns_uri) throws XmlError {
+        if (uri_to_name.has_key(ns_uri)) {
+            return uri_to_name[ns_uri];
+        }
+        throw new XmlError.NS_DICT_ERROR(@"NS URI $ns_uri not found.");
+    }
+
+    public string find_uri (string name) throws XmlError {
+        if (name_to_uri.has_key(name)) {
+            return name_to_uri[name];
+        }
+        throw new XmlError.NS_DICT_ERROR(@"NS name $name not found.");
+    }
+
+    public NamespaceState clone() {
+        return new NamespaceState.copy(this);
+    }
+
+    public string to_string () {
+        StringBuilder sb = new StringBuilder ();
+        sb.append ("NamespaceState{");
+        foreach (string key in uri_to_name.keys) {
+            sb.append(key);
+            sb.append_c('=');
+            sb.append(uri_to_name[key]);
+            sb.append_c(',');
+        }
+        sb.append("current=");
+        sb.append(current_ns_uri);
+        sb.append_c('}');
+        return sb.str;
+    }
+}
+}
+\ No newline at end of file