1 files changed, 91 insertions, 0 deletions
diff --git a/comm/mailnews/db/gloda/modules/NounFreetag.jsm b/comm/mailnews/db/gloda/modules/NounFreetag.jsm
new file mode 100644
index 0000000000..cb169645f1
--- /dev/null
+++ b/comm/mailnews/db/gloda/modules/NounFreetag.jsm
@@ -0,0 +1,91 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+const EXPORTED_SYMBOLS = ["FreeTag", "FreeTagNoun"];
+
+const { Gloda } = ChromeUtils.import("resource:///modules/gloda/Gloda.jsm");
+
+function FreeTag(aTagName) {
+  this.name = aTagName;
+}
+
+FreeTag.prototype = {
+  toString() {
+    return this.name;
+  },
+};
+
+/**
+ * @namespace Tag noun provider.  Since the tag unique value is stored as a
+ *  parameter, we are an odd case and semantically confused.
+ */
+var FreeTagNoun = {
+  _log: console.createInstance({
+    prefix: "gloda.noun.freetag",
+    maxLogLevel: "Warn",
+    maxLogLevelPref: "gloda.loglevel",
+  }),
+
+  name: "freetag",
+  clazz: FreeTag,
+  allowsArbitraryAttrs: false,
+  usesParameter: true,
+
+  _listeners: [],
+  addListener(aListener) {
+    this._listeners.push(aListener);
+  },
+  removeListener(aListener) {
+    let index = this._listeners.indexOf(aListener);
+    if (index >= 0) {
+      this._listeners.splice(index, 1);
+    }
+  },
+
+  populateKnownFreeTags() {
+    for (let attr of this.objectNounOfAttributes) {
+      let attrDB = attr.dbDef;
+      for (let param in attrDB.parameterBindings) {
+        this.getFreeTag(param);
+      }
+    }
+  },
+
+  knownFreeTags: {},
+  getFreeTag(aTagName) {
+    let tag = this.knownFreeTags[aTagName];
+    if (!tag) {
+      tag = this.knownFreeTags[aTagName] = new FreeTag(aTagName);
+      for (let listener of this._listeners) {
+        listener.onFreeTagAdded(tag);
+      }
+    }
+    return tag;
+  },
+
+  comparator(a, b) {
+    if (a == null) {
+      if (b == null) {
+        return 0;
+      }
+      return 1;
+    } else if (b == null) {
+      return -1;
+    }
+    return a.name.localeCompare(b.name);
+  },
+
+  toParamAndValue(aTag) {
+    return [aTag.name, null];
+  },
+
+  toJSON(aTag) {
+    return aTag.name;
+  },
+  fromJSON(aTagName) {
+    return this.getFreeTag(aTagName);
+  },
+};
+
+Gloda.defineNoun(FreeTagNoun);