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	// 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	this.in_dropdown = false;
77
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	if (this.in_dropdown) this.select_entry();
150	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	default:
169	this.in_dropdown = false;
170	}
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	this.index==i && this.in_dropdown ?
211	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	this.in_dropdown = true;
228	},
229
230	mark_next: function() {
231	if(this.index < this.entry_count-1) this.index++
232	else this.index = 0;
233	if (! this.in_dropdown) this.index = 0;
234	this.in_dropdown = true;
235	},
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	});