1 files changed, 92 insertions, 0 deletions
diff --git a/src/empathy-chat.js b/src/empathy-chat.js
new file mode 100644
index 000000000..236049959
--- /dev/null
+++ b/src/empathy-chat.js
@@ -0,0 +1,92 @@
+/*
+ * Copyright (C) 2012 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Author: Debarshi Ray <debarshir@src.gnome.org>
+ */
+
+
+var chat = document.getElementById("Chat");
+
+
+function createHTMLNode(html) {
+  var range = document.createRange();
+  range.selectNode(chat);
+  return range.createContextualFragment(html);
+}
+
+
+function getContentsNode(node) {
+  var post = node.getElementsByClassName("post")[0];
+  return post.getElementsByClassName("post-contents")[0];
+}
+
+
+// Remove all but the last #insert
+function removeInsertNodes(node) {
+  var inserts = node.querySelectorAll("#insert");
+  if (inserts.length < 2)
+    return;
+
+  for (var i = 0; i < inserts.length - 1; i++) {
+    var insert = inserts[i];
+    insert.parentNode.removeChild(insert);
+  }
+}
+
+
+// Remove all but the first #prepend
+function removePrependNodes(node) {
+  var pres = node.querySelectorAll("#prepend");
+  if (pres.length < 2)
+    return;
+
+  for (var i = 1; i < pres.length; i++) {
+    var pre = pres[i];
+    pre.parentNode.removeChild(pre);
+  }
+}
+
+
+function prepend(html) {
+  var node = createHTMLNode(html);
+  chat.insertBefore(node, chat.firstChild);
+
+  // The lastChild should retain the #insert
+  if (chat.children.length == 1)
+    return;
+
+  removeInsertNodes(chat);
+  removePrependNodes(chat);
+}
+
+
+function prependPrev(html) {
+  var pre = chat.firstChild.querySelector("#prepend");
+
+  // For themes that don't support #prepend
+  if (!pre) {
+    prepend(html);
+    return;
+  }
+
+  var contents = pre.parentNode;
+  var node = createHTMLNode(html);
+
+  // Skip both the #prepend and #insert
+  for (var i = node.childNodes.length - 2; i > 0; i--)
+    contents.insertBefore(node.childNodes[i], pre.nextSibling);
+}