Open-ILS/xul/staff_client/chrome/content/util/exec.js

   1 dump('entering util/exec.js\n');
   2
   3 if (typeof util == 'undefined') var util = {};
   4 util.exec = function() {
   5         //JSAN.use('util.error'); this.error = new util.error();
   6
   7         return this;
   8 };
   9
  10 util.exec.prototype = {
  11         // This executes a series of functions, but tries to give other events/functions a chance to
  12         // execute between each one.
  13         'chain' : function () {
  14                 var args = [];
  15                 var obj = this;
  16                 for (var i = 0; i < arguments.length; i++) {
  17                         var arg = arguments[i];
  18                         switch(arg.constructor.name) {
  19                                 case 'Function' :
  20                                         args.push( arg );
  21                                 break;
  22                                 case 'Array' :
  23                                         for (var j = 0; j < arg.length; j++) {
  24                                                 if (typeof arg[j] == 'function') args.push( arg[j] );
  25                                         }
  26                                 break;
  27                                 case 'Object' :
  28                                         for (var j in arg) {
  29                                                 if (typeof arg[j] == 'function') args.push( arg[j] );
  30                                         }
  31                                 break;
  32                         }
  33                 }
  34                 if (args.length > 0) setTimeout(
  35                         function() {
  36                                 try {
  37                                         args[0]();
  38                                         if (args.length > 1 ) obj.chain( args.slice(1) );
  39                                 } catch(E) {
  40                                         dump('util.exec.chain error: ' + js2JSON(E) + '\n');
  41                                         var keep_going = false;
  42                                         if (typeof obj.on_error == 'function') {
  43                                                 keep_going = obj.on_error(E);
  44                                         }
  45                                         if (keep_going) {
  46                                                 dump('chain not broken\n');
  47                                                 try {
  48                                                         if (args.length > 1 ) obj.chain( args.slice(1) );
  49
  50                                                 } catch(E) {
  51                                                         dump('another error: ' + js2JSON(E) + '\n');
  52                                                 }
  53                                         } else {
  54                                                 dump('chain broken\n');
  55                                         }
  56                                 }
  57                         }, 0
  58                 );
  59         }
  60 }
  61
  62 dump('exiting util/exec.js\n');