modules/client-redirect.jsx

   1 /**
   2  * (C) Copyright 2012 John J. Foerch
   3  *
   4  * Use, modification, and distribution are subject to the terms specified in the
   5  * COPYING file.
   6 **/
   7
   8 var redirects = {};
   9
  10 function define_client_redirect (name) {
  11     var transforms = Array.prototype.slice.call(arguments, 1);
  12     function transform (location) {
  13         for (var i = 0, n = transforms.length; i < n; ++i) {
  14             if (transforms[i] instanceof RegExp) {
  15                 if (location instanceof Ci.nsIURI)
  16                     var lstr = location.spec;
  17                 else
  18                     lstr = location;
  19                 location = transforms[i].exec(lstr);
  20             } else
  21                 location = transforms[i](location);
  22             if (location == null)
  23                 return null;
  24         }
  25         return location;
  26     }
  27     redirects[name] = transform;
  28 }
  29
  30 function do_client_redirect (buffer, request, location) {
  31     try {
  32         location = location.QueryInterface(Ci.nsIURL);
  33         for (let [name, handler] in Iterator(redirects)) {
  34             var redirect = handler(location);
  35             if (redirect) {
  36                 var history = buffer.web_navigation.sessionHistory;
  37                 var entry = history.getEntryAtIndex(history.index, false);
  38                 if (history.index > 0) {
  39                     if (entry.URI.spec == location.spec)
  40                         history.getEntryAtIndex(history.index - 1, true);
  41                 } else if (entry.URI.spec == location.spec)
  42                     history.PurgeHistory(1);
  43                 buffer.load(redirect);
  44                 return;
  45             }
  46         }
  47     } catch (e) {}
  48 }
  49
  50 add_hook('content_buffer_location_change_hook', do_client_redirect);
  51
  52 conkeror.define_client_redirect = define_client_redirect;
  53
  54 provide("client-redirect");