1 files changed, 142 insertions, 0 deletions
diff --git a/comm/mailnews/base/prefs/content/am-prefs.js b/comm/mailnews/base/prefs/content/am-prefs.js
new file mode 100644
index 0000000000..cff09a5d93
--- /dev/null
+++ b/comm/mailnews/base/prefs/content/am-prefs.js
@@ -0,0 +1,142 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * 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/. */
+
+/* functions for disabling front end elements when the appropriate
+   back-end preference is locked. */
+
+/**
+ * Prefs in MailNews require dynamic portions to indicate
+ * which of multiple servers or identities. This function
+ * takes a string and a xul element.
+ *
+ * @param {string} aStr - The string is a prefstring with a token %tokenname%.
+ * @param {Element} aElement - The 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, aElement) {
+  let tokenpat = /%(\w+)%/;
+  let token;
+  let newprefstr = "";
+
+  let 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 (let i = 0; i < prefPartsArray.length; i++) {
+    token = prefPartsArray[i].match(tokenpat);
+    if (token) {
+      // We've got a %% match.
+      if (token[1]) {
+        if (aElement[token[1]]) {
+          newprefstr += aElement[token[1]] + "."; // here's where we get the info
+        } else {
+          // All we got was this stinkin %.
+          newprefstr += prefPartsArray[i] + ".";
+        }
+      }
+    } else {
+      // token is falsy.
+      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 to check if a pref in an element is locked.
+ *
+ * @param {Element} aElement - An element with the pref related attributes
+ *   (pref, preftype, prefstring)
+ * @returns {boolean} whether the prefstring specified in that element is
+ *   locked (true/false). If it does not have a valid prefstring, a false is
+ *   returned.
+ */
+function getAccountValueIsLocked(aElement) {
+  let prefstring = aElement.getAttribute("prefstring");
+  if (prefstring) {
+    let prefstr = substPrefTokens(prefstring, aElement);
+    // see if the prefstring is locked
+    if (prefstr) {
+      return Services.prefs.prefIsLocked(prefstr);
+    }
+  }
+  return false;
+}
+
+/**
+ * Enables/disables element (slave) according to the checked state
+ * of another elements (masters).
+ *
+ * @param {string} aChangeElementId - Slave element which should be enabled
+ *   if all the checkElementIDs are checked. Otherwise it gets disabled.
+ * @param {string[]} aCheckElementIds - An array of IDs of the master elements.
+ *
+ * @see bug 728681 for the pattern on how this is used.
+ */
+function onCheckItem(aChangeElementId, aCheckElementIds) {
+  let elementToControl = document.getElementById(aChangeElementId);
+  let disabled = false;
+
+  for (let notifyId of aCheckElementIds) {
+    let notifyElement = document.getElementById(notifyId);
+    let notifyElementState = null;
+    if ("checked" in notifyElement) {
+      notifyElementState = notifyElement.checked;
+    } else if ("selected" in notifyElement) {
+      notifyElementState = notifyElement.selected;
+    } else {
+      console.error("Unknown type of control element: " + notifyElement.id);
+    }
+
+    if (!notifyElementState) {
+      disabled = true;
+      break;
+    }
+  }
+
+  if (!disabled && getAccountValueIsLocked(elementToControl)) {
+    disabled = true;
+  }
+
+  elementToControl.disabled = disabled;
+}
+
+/**
+ * Hides and shows elements relevant for the given server type.
+ *
+ * @param {string} serverType - Name of the server type for which to show/hide elements.
+ */
+function hideShowControls(serverType) {
+  let controls = document.querySelectorAll("[hidefor]");
+  for (let controlNo = 0; controlNo < controls.length; controlNo++) {
+    let control = controls[controlNo];
+    let hideFor = control.getAttribute("hidefor");
+
+    // Hide unsupported server types using hideFor="servertype1,servertype2".
+    let hide = false;
+    let hideForTokens = hideFor.split(",");
+    for (let tokenNo = 0; tokenNo < hideForTokens.length; tokenNo++) {
+      if (hideForTokens[tokenNo] == serverType) {
+        hide = true;
+        break;
+      }
+    }
+
+    if (hide) {
+      control.setAttribute("hidden", "true");
+    } else {
+      control.removeAttribute("hidden");
+    }
+  }
+}