bug 70623: Mail/News account settings need to honor locked prefs

r=racham, sr=alecf

mailnews/base/prefs/resources/content/am-prefs.js

@@ -0,0 +1,103 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * The contents of this file are subject to the Netscape Public
+ * License Version 1.1 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.mozilla.org/NPL/
+ *
+ * Software distributed under the License is distributed on an "AS
+ * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+ * implied. See the License for the specific language governing
+ * rights and limitations under the License.
+ *
+ * The Original Code is Mozilla Communicator client code, released
+ * March 31, 1998.
+ *
+ * The Initial Developer of the Original Code is Netscape
+ * Communications Corporation. Portions created by Netscape are
+ * Copyright (C) 1998-1999 Netscape Communications Corporation. All
+ * Rights Reserved.
+ */
+
+
+/* functions for disabling front end elements when the appropriate
+   back-end preference is locked. */
+
+
+var nsPrefBranch = null;
+
+// Prefs in mailnews require dynamic portions to indicate 
+// which of multiple servers or identies.  This function
+// takes a string and a xul element.
+//  The string is a prefstring with a token %tokenname%.
+//  The xul element has an attribute of name |tokenname|
+//  whose value is substituted into the string and returned
+//  by the function.
+//  Any tokens which do not have associated attribute value
+//  are not substituted, and left in the string as-is.
+function substPrefTokens(aStr, element)
+{
+  var tokenpat = /%(\w+)%/;
+  var token;
+  var newprefstr = "";
+
+  var prefPartsArray = aStr.split(".");
+  /* here's a little loop that goes through
+     each part of the string separated by a dot, and
+     if any parts are of the form %string%, it will replace
+     them with the value of the attribute of that name from
+     the xul object */
+  for (var i=0; i< prefPartsArray.length; i++) {
+    token = prefPartsArray[i].match(tokenpat);
+    if (token) { /* we've got a %% match */
+      if (token[1]) {
+        if (element[token[1]]) {
+          newprefstr += element[token[1]] + "."; // here's where we get the info
+        } else { /* all we got was this stinkin % */
+          newprefstr += prefPartsArray[i] + ".";
+        }
+      }
+    } else /* if (token) */ {
+      newprefstr += prefPartsArray[i] + ".";
+    }
+  }
+  newprefstr = newprefstr.slice(0,-1); // remove the last char, a dot
+  if (newprefstr.length <=0 )
+    newprefstr = null;
+
+  return newprefstr;
+}
+
+// A simple function which given a xul element with
+// the pref related attributes (pref, preftype, prefstring)
+// return if the prefstring specified in that element is
+// locked (true/false).
+// If it does not have a valid prefstring, a false is returned.
+function getAccountValueIsLocked(element)
+{
+  var prefstr = "";
+  var preftype;
+  var prefval;
+
+  if (!nsPrefBranch) {
+    var prefService = Components.classes["@mozilla.org/preferences-service;1"];
+    prefService = prefService.getService();
+    prefService = prefService.QueryInterface(Components.interfaces.nsIPrefService);
+
+    nsPrefBranch = prefService.getBranch(null);
+  }
+
+
+  if (element.getAttribute("pref") == "true" ) {
+    preftype    = element.getAttribute("preftype");
+    prefstring  = element.getAttribute("prefstring");
+    prefstr = substPrefTokens(prefstring, element);
+    // see if the prefstring is locked
+    if (prefstr) {
+      var bLocked=nsPrefBranch.prefIsLocked(prefstr);
+return true;
+      return bLocked;
+    }
+  }
+  return false;
+}
+