// Copyright (c) 2005 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us)
//
// 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;
}
Ajax.Autocompleter = Class.create();
Ajax.Autocompleter.prototype = (new Ajax.Base()).extend({
initialize: function(element, update, url, 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.url = url;
this.setOptions(options);
this.options.asynchronous = true;
this.options.onComplete = this.onComplete.bind(this)
this.options.frequency = this.options.frequency || 0.4;
this.options.min_chars = this.options.min_chars || 1;
this.options.method = 'post';
if(this.options.indicator)
this.indicator = $(this.options.indicator);
this.observer = null;
Event.observe(this.element, "keypress", this.onKeyPress.bindAsEventListener(this));
Event.observe(document, "click", this.onBlur.bindAsEventListener(this));
},
show: function() {
Element.show(this.update);
if(!this.iefix && (navigator.appVersion.indexOf('MSIE')>0)) {
new Insertion.Before(this.update,
'<iframe id="' + this.update.id + '_iefix" style="display:none;" src="javascript:false;" frameborder="0" scrolling="no"></iframe>');
this.iefix = $(this.update.id+'_iefix');
this.iefix.style.position = 'absolute';
this.iefix.style.zIndex = 1;
this.update.style.zIndex = 2;
}
if(this.iefix) {
Position.clone(this.update, this.iefix);
Element.show(this.iefix);
}
},
hide: function() {
if(this.iefix) Element.hide(this.iefix);
Element.hide(this.update);
},
startIndicator: function() {
if(this.indicator) Element.show(this.indicator);
},
stopIndicator: function() {
if(this.indicator) Element.hide(this.indicator);
},
onObserverEvent: function() {
this.changed = false;
if(this.element.value.length>=this.options.min_chars) {
this.startIndicator();
this.options.parameters = this.options.callback ?
this.options.callback(this.element, Form.Element.getValue(this.element)) :
Form.Element.getValue(this.element);
new Ajax.Request(this.url, this.options);
} else {
this.active = false;
this.hide();
}
},
onComplete: function(request) {
if(!this.changed) {
this.update.innerHTML = request.responseText;
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;
Event.observe(entry, "mouseover", this.onHover.bindAsEventListener(this));
Event.observe(entry, "click", this.onClick.bindAsEventListener(this));
}
} else {
this.entry_count = 0;
}
this.stopIndicator();
this.index = 0;
this.render();
}
},
onKeyPress: function(event) {
if(this.active)
switch(event.keyCode) {
case Event.KEY_TAB:
case Event.KEY_RETURN:
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;
}
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) {
element = Event.findElement(event, 'LI');
if(this.index != element.autocompleteIndex)
{
this.index = element.autocompleteIndex;
this.render();
}
},
onClick: function(event) {
element = Event.findElement(event, 'LI');
this.index = element.autocompleteIndex;
this.select_entry();
},
onBlur: function(event) {
element = Event.element(event);
if(element==this.update) return;
while(element.parentNode)
{ element = element.parentNode; if(element==this.update) return; }
this.hide();
this.active = false;
},
render: function() {
if(this.entry_count > 0) {
for (var i = 0; i < this.entry_count; i++)
this.index==i ?
Element.Class.add(this.get_entry(i),"selected") :
Element.Class.remove(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;
},
mark_next: function() {
if(this.index < this.entry_count-1) this.index++
else this.index = 0;
},
get_entry: function(index) {
return this.update.firstChild.childNodes[index];
},
get_current_entry: function() {
return this.get_entry(this.index);
},
select_entry: function() {
this.hide();
this.active = false;
value = Element.collectTextNodesIgnoreClass(this.get_current_entry(), 'informal').unescapeHTML();
this.element.value = value;
this.element.focus();
}
});
