root/js/controls.js

// Copyright (c) 2005 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us)
//           (c) 2005 Ivan Krstic (http://blogs.law.harvard.edu/ivan)
// 
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Element.collectTextNodesIgnoreClass = function(element, ignoreclass) {
  var children = $(element).childNodes;
  var text     = "";
  var classtest = new RegExp("^([^ ]+ )*" + ignoreclass+ "( [^ ]+)*$","i");
  
  for (var i = 0; i < children.length; i++) {
    if(children[i].nodeType==3) {
      text+=children[i].nodeValue;
    } else {
      if((!children[i].className.match(classtest)) && children[i].hasChildNodes())
        text += Element.collectTextNodesIgnoreClass(children[i], ignoreclass);
    }
  }
  
  return text;
}

// Autocompleter.Base handles all the autocompletion functionality 
// that's independent of the data source for autocompletion. This
// includes drawing the autocompletion menu, observing keyboard
// and mouse events, and similar.
//
// Specific autocompleters need to provide, at the very least, 
// a getUpdatedChoices function that will be invoked every time
// the text inside the monitored textbox changes. This method 
// should get the text for which to provide autocompletion by
// invoking this.getEntry(), NOT by directly accessing
// this.element.value. This is to allow incremental tokenized
// autocompletion. Specific auto-completion logic (AJAX, etc)
// belongs in getUpdatedChoices.
//
// Tokenized incremental autocompletion is enabled automatically
// when an autocompleter is instantiated with the 'tokens' option
// in the options parameter, e.g.:
// new Ajax.Autocompleter('id','upd', '/url/', { tokens: ',' });
// will incrementally autocomplete with a comma as the token.
// Additionally, ',' in the above example can be replaced with
// a token array, e.g. { tokens: new Array (',', '\n') } which
// enables autocompletion on multiple tokens. This is most 
// useful when one of the tokens is \n (a newline), as it 
// allows smart autocompletion after linebreaks.

var Autocompleter = {}
Autocompleter.Base = function() {};
Autocompleter.Base.prototype = {
  base_initialize: function(element, update, options) {
    this.element     = $(element); 
    this.update      = $(update);  
    this.has_focus   = false; 
    this.changed     = false; 
    this.active      = false; 
    this.index       = 0;     
    this.entry_count = 0;
    this.in_dropdown = false;

    if (this.setOptions)
      this.setOptions(options);
    else
      this.options = {}
     
    this.options.tokens       = this.options.tokens || new Array();
    this.options.frequency    = this.options.frequency || 0.4;
    this.options.min_chars    = this.options.min_chars || 1;
    this.options.onShow       = this.options.onShow || 
    function(element, update){ 
      if(!update.style.position || update.style.position=='absolute') {
        update.style.position = 'absolute';
          var offsets = Position.cumulativeOffset(element);
          update.style.left = offsets[0] + 'px';
          update.style.top  = (offsets[1] + element.offsetHeight) + 'px';
          update.style.width = element.offsetWidth + 'px';
      }
      new Effect.Appear(update,{duration:0.15});
    };
    this.options.onHide = this.options.onHide || 
    function(element, update){ new Effect.Fade(update,{duration:0.15}) };
    
    if(this.options.indicator)
      this.indicator = $(this.options.indicator);

    if (typeof(this.options.tokens) == 'string') 
      this.options.tokens = new Array(this.options.tokens);
       
    this.observer = null;
    
    Element.hide(this.update);
    
    Event.observe(this.element, "blur", this.onBlur.bindAsEventListener(this));
    Event.observe(this.element, "keypress", this.onKeyPress.bindAsEventListener(this));
  },

  show: function() {
    if(this.update.style.display=='none') this.options.onShow(this.element, this.update);
    if(!this.iefix && (navigator.appVersion.indexOf('MSIE')>0) && this.update.style.position=='absolute') {
      new Insertion.After(this.update, 
       '<iframe id="' + this.update.id + '_iefix" '+
       'style="display:none;filter:progid:DXImageTransform.Microsoft.Alpha(opacity=0);" ' +
       'src="javascript:false;" frameborder="0" scrolling="no"></iframe>');
      this.iefix = $(this.update.id+'_iefix');
    }
    if(this.iefix) {
      Position.clone(this.update, this.iefix);
      this.iefix.style.zIndex = 1;
      this.update.style.zIndex = 2;
      Element.show(this.iefix);
    }
  },
  
  hide: function() {
    if(this.update.style.display=='') this.options.onHide(this.element, this.update);
    if(this.iefix) Element.hide(this.iefix);
  },
  
  startIndicator: function() {
    if(this.indicator) Element.show(this.indicator);
  },
  
  stopIndicator: function() {
    if(this.indicator) Element.hide(this.indicator);
  },

  onKeyPress: function(event) {
    if(this.active)
      switch(event.keyCode) {
       case Event.KEY_TAB:
       case Event.KEY_RETURN:
         if (this.in_dropdown) this.select_entry();
         Event.stop(event);
       case Event.KEY_ESC:
         this.hide();
         this.active = false;
         return;
       case Event.KEY_LEFT:
       case Event.KEY_RIGHT:
         return;
       case Event.KEY_UP:
         this.mark_previous();
         this.render();
         if(navigator.appVersion.indexOf('AppleWebKit')>0) Event.stop(event);
         return;
       case Event.KEY_DOWN:
         this.mark_next();
         this.render();
         if(navigator.appVersion.indexOf('AppleWebKit')>0) Event.stop(event);
         return;
       default:
         this.in_dropdown = false;
      }
     else 
      if(event.keyCode==Event.KEY_TAB || event.keyCode==Event.KEY_RETURN) 
        return;
    
    this.changed = true;
    this.has_focus = true;
    
    if(this.observer) clearTimeout(this.observer);
      this.observer = 
        setTimeout(this.onObserverEvent.bind(this), this.options.frequency*1000);
  },
  
  onHover: function(event) {
    var element = Event.findElement(event, 'LI');
    if(this.index != element.autocompleteIndex) 
    {
        this.index = element.autocompleteIndex;
        this.render();
    }
    Event.stop(event);
  },
  
  onClick: function(event) {
    var element = Event.findElement(event, 'LI');
    this.index = element.autocompleteIndex;
    this.select_entry();
    Event.stop(event);
  },
  
  onBlur: function(event) {
    // needed to make click events working
    setTimeout(this.hide.bind(this), 250);
    this.has_focus = false;
    this.active = false;     
  }, 
  
  render: function() {
    if(this.entry_count > 0) {
      for (var i = 0; i < this.entry_count; i++)
        this.index==i && this.in_dropdown ? 
          Element.addClassName(this.get_entry(i),"selected") : 
          Element.removeClassName(this.get_entry(i),"selected");
        
      if(this.has_focus) { 
        if(this.get_current_entry().scrollIntoView) 
          this.get_current_entry().scrollIntoView(false);
        
        this.show();
        this.active = true;
      }
    } else this.hide();
  },
  
  mark_previous: function() {
    if(this.index > 0) this.index--
      else this.index = this.entry_count-1;
    this.in_dropdown = true;
  },
  
  mark_next: function() {
    if(this.index < this.entry_count-1) this.index++
      else this.index = 0;
    if (! this.in_dropdown) this.index = 0;
    this.in_dropdown = true;
  },
  
  get_entry: function(index) {
    return this.update.firstChild.childNodes[index];
  },
  
  get_current_entry: function() {
    return this.get_entry(this.index);
  },
  
  select_entry: function() {
    this.active = false;
    value = Element.collectTextNodesIgnoreClass(this.get_current_entry(), 'informal').unescapeHTML();
    this.updateElement(value);
    this.element.focus();
  },

  updateElement: function(value) {
    var last_token_pos = this.findLastToken();
    if (last_token_pos != -1) {
      var new_value = this.element.value.substr(0, last_token_pos + 1);
      var whitespace = this.element.value.substr(last_token_pos + 1).match(/^\s+/);
      if (whitespace)
        new_value += whitespace[0];
      this.element.value = new_value + value;
    } else {
      this.element.value = value;
    } 
  },
  
  updateChoices: function(choices) {
    if(!this.changed && this.has_focus) {
      this.update.innerHTML = choices;
      Element.cleanWhitespace(this.update);
      Element.cleanWhitespace(this.update.firstChild);

      if(this.update.firstChild && this.update.firstChild.childNodes) {
        this.entry_count = 
          this.update.firstChild.childNodes.length;
        for (var i = 0; i < this.entry_count; i++) {
          entry = this.get_entry(i);
          entry.autocompleteIndex = i;
          this.addObservers(entry);
        }
      } else { 
        this.entry_count = 0;
      }
      
      this.stopIndicator();
      
      this.index = 0;
      this.render();
    }
  },

  addObservers: function(element) {
    Event.observe(element, "mouseover", this.onHover.bindAsEventListener(this));
    Event.observe(element, "click", this.onClick.bindAsEventListener(this));
  },

  onObserverEvent: function() {
    this.changed = false;   
    if(this.getEntry().length>=this.options.min_chars) {
      this.startIndicator();
      this.getUpdatedChoices();
    } else {
      this.active = false;
      this.hide();
    }
  },

  getEntry: function() {
    var token_pos = this.findLastToken();
    if (token_pos != -1)
      var ret = this.element.value.substr(token_pos + 1).replace(/^\s+/,'').replace(/\s+$/,'');
    else
      var ret = this.element.value;
    
    return /\n/.test(ret) ? '' : ret;
  },

  findLastToken: function() {
    var last_token_pos = -1;

    for (var i=0; i<this.options.tokens.length; i++) {
      var this_token_pos = this.element.value.lastIndexOf(this.options.tokens[i]);
      if (this_token_pos > last_token_pos)
        last_token_pos = this_token_pos;
    }
    return last_token_pos;
  }
}

Ajax.Autocompleter = Class.create();
Ajax.Autocompleter.prototype = Object.extend(new Autocompleter.Base(), 
Object.extend(new Ajax.Base(), {
  initialize: function(element, update, url, options) {
          this.base_initialize(element, update, options);
    this.options.asynchronous  = true;
    this.options.onComplete    = this.onComplete.bind(this)
    this.options.method        = 'post';
    this.options.defaultParams = this.options.parameters || null;
    this.url                   = url;
  },
  
  getUpdatedChoices: function() {
    entry = encodeURIComponent(this.element.name) + '=' + 
      encodeURIComponent(this.getEntry());
      
    this.options.parameters = this.options.callback ?
      this.options.callback(this.element, entry) : entry;
        
    if(this.options.defaultParams) 
      this.options.parameters += '&' + this.options.defaultParams;
    
    new Ajax.Request(this.url, this.options);
  },
  
  onComplete: function(request) {
    this.updateChoices(request.responseText);
  }

}));

// The local array autocompleter. Used when you'd prefer to
// inject an array of autocompletion options into the page, rather
// than sending out Ajax queries, which can be quite slow sometimes.
//
// The constructor takes four parameters. The first two are, as usual,
// the id of the monitored textbox, and id of the autocompletion menu.
// The third is the array you want to autocomplete from, and the fourth
// is the options block.
//
// Extra local autocompletion options:
// - choices - How many autocompletion choices to offer
//
// - partial_search - If false, the autocompleter will match entered
//                    text only at the beginning of strings in the 
//                    autocomplete array. Defaults to true, which will
//                    match text at the beginning of any *word* in the
//                    strings in the autocomplete array. If you want to
//                    search anywhere in the string, additionally set
//                    the option full_search to true (default: off).
//
// - full_search - Search anywhere in autocomplete array strings.
//
// - partial_chars - How many characters to enter before triggering
//                   a partial match (unlike min_chars, which defines
//                   how many characters are required to do any match
//                   at all). Defaults to 2.
//
// - ignore_case - Whether to ignore case when autocompleting.
//                 Defaults to true.
//
// It's possible to pass in a custom function as the 'selector' 
// option, if you prefer to write your own autocompletion logic.
// In that case, the other options above will not apply unless
// you support them.

Autocompleter.Local = Class.create();
Autocompleter.Local.prototype = Object.extend(new Autocompleter.Base(), {
  initialize: function(element, update, array, options) {
    this.base_initialize(element, update, options);
    this.options.array = array;
  },

  getUpdatedChoices: function() {
    this.updateChoices(this.options.selector(this));
  },

  setOptions: function(options) {
    this.options = Object.extend({
      choices: 10,
      partial_search: true,
      partial_chars: 2,
      ignore_case: true,
      full_search: false,
      selector: function(instance) {
        var ret       = new Array(); // Beginning matches
        var partial   = new Array(); // Inside matches
        var entry     = instance.getEntry();
        var count     = 0;
        
        for (var i = 0; i < instance.options.array.length &&  
            ret.length < instance.options.choices ; i++) { 
          var elem = instance.options.array[i];
          var found_pos = instance.options.ignore_case ? 
            elem.toLowerCase().indexOf(entry.toLowerCase()) : 
            elem.indexOf(entry);

          while (found_pos != -1) {
            if (found_pos == 0 && elem.length != entry.length) { 
              ret.push("<li><strong>" + elem.substr(0, entry.length) + "</strong>" + 
                elem.substr(entry.length) + "</li>");
              break;
            } else if (entry.length >= instance.options.partial_chars && 
              instance.options.partial_search && found_pos != -1) {
              if (instance.options.full_search || /\s/.test(elem.substr(found_pos-1,1))) {
                partial.push("<li>" + elem.substr(0, found_pos) + "<strong>" +
                  elem.substr(found_pos, entry.length) + "</strong>" + elem.substr(
                  found_pos + entry.length) + "</li>");
                break;
              }
            }

            found_pos = instance.options.ignore_case ? 
              elem.toLowerCase().indexOf(entry.toLowerCase(), found_pos + 1) : 
              elem.indexOf(entry, found_pos + 1);

          }
        }
        if (partial.length)
          ret = ret.concat(partial.slice(0, instance.options.choices - ret.length))
        return "<ul>" + ret.join('') + "</ul>";
      }
    }, options || {});
  }
});
1	dpavlin	83	// Copyright (c) 2005 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us)
2			// (c) 2005 Ivan Krstic (http://blogs.law.harvard.edu/ivan)
3			//
4			// Permission is hereby granted, free of charge, to any person obtaining
5			// a copy of this software and associated documentation files (the
6			// "Software"), to deal in the Software without restriction, including
7			// without limitation the rights to use, copy, modify, merge, publish,
8			// distribute, sublicense, and/or sell copies of the Software, and to
9			// permit persons to whom the Software is furnished to do so, subject to
10			// the following conditions:
11			//
12			// The above copyright notice and this permission notice shall be
13			// included in all copies or substantial portions of the Software.
14			//
15			// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16			// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17			// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18			// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
19			// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
20			// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
21			// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
22
23			Element.collectTextNodesIgnoreClass = function(element, ignoreclass) {
24			var children = $(element).childNodes;
25			var text = "";
26			var classtest = new RegExp("^([^ ]+ )" + ignoreclass+ "( [^ ]+)$","i");
27
28			for (var i = 0; i < children.length; i++) {
29			if(children[i].nodeType==3) {
30			text+=children[i].nodeValue;
31			} else {
32			if((!children[i].className.match(classtest)) && children[i].hasChildNodes())
33			text += Element.collectTextNodesIgnoreClass(children[i], ignoreclass);
34			}
35			}
36
37			return text;
38			}
39
40			// Autocompleter.Base handles all the autocompletion functionality
41			// that's independent of the data source for autocompletion. This
42			// includes drawing the autocompletion menu, observing keyboard
43			// and mouse events, and similar.
44			//
45			// Specific autocompleters need to provide, at the very least,
46			// a getUpdatedChoices function that will be invoked every time
47			// the text inside the monitored textbox changes. This method
48			// should get the text for which to provide autocompletion by
49			// invoking this.getEntry(), NOT by directly accessing
50			// this.element.value. This is to allow incremental tokenized
51			// autocompletion. Specific auto-completion logic (AJAX, etc)
52			// belongs in getUpdatedChoices.
53			//
54			// Tokenized incremental autocompletion is enabled automatically
55			// when an autocompleter is instantiated with the 'tokens' option
56			// in the options parameter, e.g.:
57			// new Ajax.Autocompleter('id','upd', '/url/', { tokens: ',' });
58			// will incrementally autocomplete with a comma as the token.
59			// Additionally, ',' in the above example can be replaced with
60			// a token array, e.g. { tokens: new Array (',', '\n') } which
61			// enables autocompletion on multiple tokens. This is most
62			// useful when one of the tokens is \n (a newline), as it
63			// allows smart autocompletion after linebreaks.
64
65			var Autocompleter = {}
66			Autocompleter.Base = function() {};
67			Autocompleter.Base.prototype = {
68			base_initialize: function(element, update, options) {
69			this.element = $(element);
70			this.update = $(update);
71			this.has_focus = false;
72			this.changed = false;
73			this.active = false;
74			this.index = 0;
75			this.entry_count = 0;
76	dpavlin	105	this.in_dropdown = false;
77	dpavlin	83
78			if (this.setOptions)
79			this.setOptions(options);
80			else
81			this.options = {}
82
83			this.options.tokens = this.options.tokens \|\| new Array();
84			this.options.frequency = this.options.frequency \|\| 0.4;
85			this.options.min_chars = this.options.min_chars \|\| 1;
86			this.options.onShow = this.options.onShow \|\|
87			function(element, update){
88			if(!update.style.position \|\| update.style.position=='absolute') {
89			update.style.position = 'absolute';
90			var offsets = Position.cumulativeOffset(element);
91			update.style.left = offsets[0] + 'px';
92			update.style.top = (offsets[1] + element.offsetHeight) + 'px';
93			update.style.width = element.offsetWidth + 'px';
94			}
95			new Effect.Appear(update,{duration:0.15});
96			};
97			this.options.onHide = this.options.onHide \|\|
98			function(element, update){ new Effect.Fade(update,{duration:0.15}) };
99
100			if(this.options.indicator)
101			this.indicator = $(this.options.indicator);
102
103			if (typeof(this.options.tokens) == 'string')
104			this.options.tokens = new Array(this.options.tokens);
105
106			this.observer = null;
107
108			Element.hide(this.update);
109
110			Event.observe(this.element, "blur", this.onBlur.bindAsEventListener(this));
111			Event.observe(this.element, "keypress", this.onKeyPress.bindAsEventListener(this));
112			},
113
114			show: function() {
115			if(this.update.style.display=='none') this.options.onShow(this.element, this.update);
116			if(!this.iefix && (navigator.appVersion.indexOf('MSIE')>0) && this.update.style.position=='absolute') {
117			new Insertion.After(this.update,
118			'<iframe id="' + this.update.id + '_iefix" '+
119			'style="display:none;filter:progid:DXImageTransform.Microsoft.Alpha(opacity=0);" ' +
120			'src="javascript:false;" frameborder="0" scrolling="no"></iframe>');
121			this.iefix = $(this.update.id+'_iefix');
122			}
123			if(this.iefix) {
124			Position.clone(this.update, this.iefix);
125			this.iefix.style.zIndex = 1;
126			this.update.style.zIndex = 2;
127			Element.show(this.iefix);
128			}
129			},
130
131			hide: function() {
132			if(this.update.style.display=='') this.options.onHide(this.element, this.update);
133			if(this.iefix) Element.hide(this.iefix);
134			},
135
136			startIndicator: function() {
137			if(this.indicator) Element.show(this.indicator);
138			},
139
140			stopIndicator: function() {
141			if(this.indicator) Element.hide(this.indicator);
142			},
143
144			onKeyPress: function(event) {
145			if(this.active)
146			switch(event.keyCode) {
147			case Event.KEY_TAB:
148			case Event.KEY_RETURN:
149	dpavlin	105	if (this.in_dropdown) this.select_entry();
150	dpavlin	83	Event.stop(event);
151			case Event.KEY_ESC:
152			this.hide();
153			this.active = false;
154			return;
155			case Event.KEY_LEFT:
156			case Event.KEY_RIGHT:
157			return;
158			case Event.KEY_UP:
159			this.mark_previous();
160			this.render();
161			if(navigator.appVersion.indexOf('AppleWebKit')>0) Event.stop(event);
162			return;
163			case Event.KEY_DOWN:
164			this.mark_next();
165			this.render();
166			if(navigator.appVersion.indexOf('AppleWebKit')>0) Event.stop(event);
167			return;
168	dpavlin	105	default:
169			this.in_dropdown = false;
170	dpavlin	83	}
171			else
172			if(event.keyCode==Event.KEY_TAB \|\| event.keyCode==Event.KEY_RETURN)
173			return;
174
175			this.changed = true;
176			this.has_focus = true;
177
178			if(this.observer) clearTimeout(this.observer);
179			this.observer =
180			setTimeout(this.onObserverEvent.bind(this), this.options.frequency*1000);
181			},
182
183			onHover: function(event) {
184			var element = Event.findElement(event, 'LI');
185			if(this.index != element.autocompleteIndex)
186			{
187			this.index = element.autocompleteIndex;
188			this.render();
189			}
190			Event.stop(event);
191			},
192
193			onClick: function(event) {
194			var element = Event.findElement(event, 'LI');
195			this.index = element.autocompleteIndex;
196			this.select_entry();
197			Event.stop(event);
198			},
199
200			onBlur: function(event) {
201			// needed to make click events working
202			setTimeout(this.hide.bind(this), 250);
203			this.has_focus = false;
204			this.active = false;
205			},
206
207			render: function() {
208			if(this.entry_count > 0) {
209			for (var i = 0; i < this.entry_count; i++)
210	dpavlin	105	this.index==i && this.in_dropdown ?
211	dpavlin	83	Element.addClassName(this.get_entry(i),"selected") :
212			Element.removeClassName(this.get_entry(i),"selected");
213
214			if(this.has_focus) {
215			if(this.get_current_entry().scrollIntoView)
216			this.get_current_entry().scrollIntoView(false);
217
218			this.show();
219			this.active = true;
220			}
221			} else this.hide();
222			},
223
224			mark_previous: function() {
225			if(this.index > 0) this.index--
226			else this.index = this.entry_count-1;
227	dpavlin	105	this.in_dropdown = true;
228	dpavlin	83	},
229
230			mark_next: function() {
231			if(this.index < this.entry_count-1) this.index++
232			else this.index = 0;
233	dpavlin	105	if (! this.in_dropdown) this.index = 0;
234			this.in_dropdown = true;
235	dpavlin	83	},
236
237			get_entry: function(index) {
238			return this.update.firstChild.childNodes[index];
239			},
240
241			get_current_entry: function() {
242			return this.get_entry(this.index);
243			},
244
245			select_entry: function() {
246			this.active = false;
247			value = Element.collectTextNodesIgnoreClass(this.get_current_entry(), 'informal').unescapeHTML();
248			this.updateElement(value);
249			this.element.focus();
250			},
251
252			updateElement: function(value) {
253			var last_token_pos = this.findLastToken();
254			if (last_token_pos != -1) {
255			var new_value = this.element.value.substr(0, last_token_pos + 1);
256			var whitespace = this.element.value.substr(last_token_pos + 1).match(/^\s+/);
257			if (whitespace)
258			new_value += whitespace[0];
259			this.element.value = new_value + value;
260			} else {
261			this.element.value = value;
262			}
263			},
264
265			updateChoices: function(choices) {
266			if(!this.changed && this.has_focus) {
267			this.update.innerHTML = choices;
268			Element.cleanWhitespace(this.update);
269			Element.cleanWhitespace(this.update.firstChild);
270
271			if(this.update.firstChild && this.update.firstChild.childNodes) {
272			this.entry_count =
273			this.update.firstChild.childNodes.length;
274			for (var i = 0; i < this.entry_count; i++) {
275			entry = this.get_entry(i);
276			entry.autocompleteIndex = i;
277			this.addObservers(entry);
278			}
279			} else {
280			this.entry_count = 0;
281			}
282
283			this.stopIndicator();
284
285			this.index = 0;
286			this.render();
287			}
288			},
289
290			addObservers: function(element) {
291			Event.observe(element, "mouseover", this.onHover.bindAsEventListener(this));
292			Event.observe(element, "click", this.onClick.bindAsEventListener(this));
293			},
294
295			onObserverEvent: function() {
296			this.changed = false;
297			if(this.getEntry().length>=this.options.min_chars) {
298			this.startIndicator();
299			this.getUpdatedChoices();
300			} else {
301			this.active = false;
302			this.hide();
303			}
304			},
305
306			getEntry: function() {
307			var token_pos = this.findLastToken();
308			if (token_pos != -1)
309			var ret = this.element.value.substr(token_pos + 1).replace(/^\s+/,'').replace(/\s+$/,'');
310			else
311			var ret = this.element.value;
312
313			return /\n/.test(ret) ? '' : ret;
314			},
315
316			findLastToken: function() {
317			var last_token_pos = -1;
318
319			for (var i=0; i<this.options.tokens.length; i++) {
320			var this_token_pos = this.element.value.lastIndexOf(this.options.tokens[i]);
321			if (this_token_pos > last_token_pos)
322			last_token_pos = this_token_pos;
323			}
324			return last_token_pos;
325			}
326			}
327
328			Ajax.Autocompleter = Class.create();
329			Ajax.Autocompleter.prototype = Object.extend(new Autocompleter.Base(),
330			Object.extend(new Ajax.Base(), {
331			initialize: function(element, update, url, options) {
332			this.base_initialize(element, update, options);
333			this.options.asynchronous = true;
334			this.options.onComplete = this.onComplete.bind(this)
335			this.options.method = 'post';
336			this.options.defaultParams = this.options.parameters \|\| null;
337			this.url = url;
338			},
339
340			getUpdatedChoices: function() {
341			entry = encodeURIComponent(this.element.name) + '=' +
342			encodeURIComponent(this.getEntry());
343
344			this.options.parameters = this.options.callback ?
345			this.options.callback(this.element, entry) : entry;
346
347			if(this.options.defaultParams)
348			this.options.parameters += '&' + this.options.defaultParams;
349
350			new Ajax.Request(this.url, this.options);
351			},
352
353			onComplete: function(request) {
354			this.updateChoices(request.responseText);
355			}
356
357			}));
358
359			// The local array autocompleter. Used when you'd prefer to
360			// inject an array of autocompletion options into the page, rather
361			// than sending out Ajax queries, which can be quite slow sometimes.
362			//
363			// The constructor takes four parameters. The first two are, as usual,
364			// the id of the monitored textbox, and id of the autocompletion menu.
365			// The third is the array you want to autocomplete from, and the fourth
366			// is the options block.
367			//
368			// Extra local autocompletion options:
369			// - choices - How many autocompletion choices to offer
370			//
371			// - partial_search - If false, the autocompleter will match entered
372			// text only at the beginning of strings in the
373			// autocomplete array. Defaults to true, which will
374			// match text at the beginning of any word in the
375			// strings in the autocomplete array. If you want to
376			// search anywhere in the string, additionally set
377			// the option full_search to true (default: off).
378			//
379			// - full_search - Search anywhere in autocomplete array strings.
380			//
381			// - partial_chars - How many characters to enter before triggering
382			// a partial match (unlike min_chars, which defines
383			// how many characters are required to do any match
384			// at all). Defaults to 2.
385			//
386			// - ignore_case - Whether to ignore case when autocompleting.
387			// Defaults to true.
388			//
389			// It's possible to pass in a custom function as the 'selector'
390			// option, if you prefer to write your own autocompletion logic.
391			// In that case, the other options above will not apply unless
392			// you support them.
393
394			Autocompleter.Local = Class.create();
395			Autocompleter.Local.prototype = Object.extend(new Autocompleter.Base(), {
396			initialize: function(element, update, array, options) {
397			this.base_initialize(element, update, options);
398			this.options.array = array;
399			},
400
401			getUpdatedChoices: function() {
402			this.updateChoices(this.options.selector(this));
403			},
404
405			setOptions: function(options) {
406			this.options = Object.extend({
407			choices: 10,
408			partial_search: true,
409			partial_chars: 2,
410			ignore_case: true,
411			full_search: false,
412			selector: function(instance) {
413			var ret = new Array(); // Beginning matches
414			var partial = new Array(); // Inside matches
415			var entry = instance.getEntry();
416			var count = 0;
417
418			for (var i = 0; i < instance.options.array.length &&
419			ret.length < instance.options.choices ; i++) {
420			var elem = instance.options.array[i];
421			var found_pos = instance.options.ignore_case ?
422			elem.toLowerCase().indexOf(entry.toLowerCase()) :
423			elem.indexOf(entry);
424
425			while (found_pos != -1) {
426			if (found_pos == 0 && elem.length != entry.length) {
427			ret.push("<li><strong>" + elem.substr(0, entry.length) + "</strong>" +
428			elem.substr(entry.length) + "</li>");
429			break;
430			} else if (entry.length >= instance.options.partial_chars &&
431			instance.options.partial_search && found_pos != -1) {
432			if (instance.options.full_search \|\| /\s/.test(elem.substr(found_pos-1,1))) {
433			partial.push("<li>" + elem.substr(0, found_pos) + "<strong>" +
434			elem.substr(found_pos, entry.length) + "</strong>" + elem.substr(
435			found_pos + entry.length) + "</li>");
436			break;
437			}
438			}
439
440			found_pos = instance.options.ignore_case ?
441			elem.toLowerCase().indexOf(entry.toLowerCase(), found_pos + 1) :
442			elem.indexOf(entry, found_pos + 1);
443
444			}
445			}
446			if (partial.length)
447			ret = ret.concat(partial.slice(0, instance.options.choices - ret.length))
448			return "<ul>" + ret.join('') + "</ul>";
449			}
450			}, options \|\| {});
451			}
452			});