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 = 0;
  11   },
  12   addLine: function(line, moveUp) {
  13     if((this.data.length == 0) || (line != this.data[0]))
  14       this.data.unshift(line);
  15
  16     if(moveUp) {
  17       this.position = 0;
  18     } else {
  19       this.position = -1;
  20     }
  21
  22     if(this.data.length > this.options.lines)
  23       this.data.pop();
  24   },
  25   upLine: function() {
  26     if(this.data.length == 0)
  27       return null;
  28
  29     if(this.position >= this.data.length)
  30       return null;
  31
  32     this.position = this.position + 1;
  33
  34     return this.data[this.position];
  35   },
  36   downLine: function() {
  37     if(this.position == -1)
  38       return null;
  39
  40     this.position = this.position - 1;
  41
  42     if(this.position == -1)
  43       return null;
  44
  45     return this.data[this.position];
  46   }
  47 });