js/irc/commandhistory.js

   1 var CommandHistory = new Class({
   2   Implements: [Options],
   3   options: {
   4     lines: 20
   5   },
   6   initialize: function(options) {
   7     this.setOptions(options);
   8
   9     this.data = [];
  10     this.position = -1;
  11   },
  12   addLine: function(line) {
  13     this.data.unshift(line);
  14     this.position = -1;
  15
  16     if(this.data.length > this.options.lines)
  17       this.data.pop();
  18   },
  19   prevLine: function() {
  20     if(this.position == 0)
  21       return null;
  22     this.position = this.position - 1;
  23
  24     return this.data[this.position];
  25   },
  26   nextLine: function() {
  27     if(this.position >= this.data.length)
  28       return null;
  29     this.position = this.position + 1;
  30
  31     return this.data[this.position];
  32   }
  33 });