metamaps--metamaps/app/assets/javascripts/autocomplete-rails-uncompressed.js
2012-12-16 15:00:43 -05:00

130 lines
4.5 KiB
JavaScript

/*
* Unobtrusive autocomplete
*
* To use it, you just have to include the HTML attribute autocomplete
* with the autocomplete URL as the value
*
* Example:
* <input type="text" data-autocomplete="/url/to/autocomplete">
*
* Optionally, you can use a jQuery selector to specify a field that can
* be updated with the element id whenever you find a matching value
*
* Example:
* <input type="text" data-autocomplete="/url/to/autocomplete" data-id-element="#id_field">
*/
(function(jQuery)
{
var self = null;
jQuery.fn.railsAutocomplete = function() {
return this.live('focus',function() {
if (!this.railsAutoCompleter) {
this.railsAutoCompleter = new jQuery.railsAutocomplete(this);
}
});
};
jQuery.railsAutocomplete = function (e) {
_e = e;
this.init(_e);
};
jQuery.railsAutocomplete.fn = jQuery.railsAutocomplete.prototype = {
railsAutocomplete: '0.0.1'
};
jQuery.railsAutocomplete.fn.extend = jQuery.railsAutocomplete.extend = jQuery.extend;
jQuery.railsAutocomplete.fn.extend({
init: function(e) {
e.delimiter = jQuery(e).attr('data-delimiter') || null;
function split( val ) {
return val.split( e.delimiter );
}
function extractLast( term ) {
return split( term ).pop().replace(/^\s+/,"");
}
jQuery(e).autocomplete({
source: function( request, response ) {
jQuery.getJSON( jQuery(e).attr('data-autocomplete'), {
term: extractLast( request.term )
}, function() {
if(arguments[0].length == 0) {
arguments[0] = []
//arguments[0][0] = { id: "", label: "no existing match" }
}
jQuery(arguments[0]).each(function(i, el) {
var obj = {};
obj[el.id] = el;
jQuery(e).data(obj);
});
response.apply(null, arguments);
});
},
change: function( event, ui ) {
if(jQuery(jQuery(this).attr('data-id-element')).val() == "") {
return;
}
jQuery(jQuery(this).attr('data-id-element')).val(ui.item ? ui.item.id : "");
var update_elements = jQuery.parseJSON(jQuery(this).attr("data-update-elements"));
var data = ui.item ? jQuery(this).data(ui.item.id.toString()) : {};
if(update_elements && jQuery(update_elements['id']).val() == "") {
return;
}
for (var key in update_elements) {
jQuery(update_elements[key]).val(ui.item ? data[key] : "");
}
},
search: function() {
// custom minLength
var term = extractLast( this.value );
if ( term.length < 2 ) {
return false;
}
},
focus: function() {
// prevent value inserted on focus
return false;
},
select: function( event, ui ) {
var terms = split( this.value );
// remove the current input
terms.pop();
// add the selected item
terms.push( ui.item.value );
// add placeholder to get the comma-and-space at the end
if (e.delimiter != null) {
terms.push( "" );
this.value = terms.join( e.delimiter );
} else {
this.value = terms.join("");
if (jQuery(this).attr('data-id-element')) {
jQuery(jQuery(this).attr('data-id-element')).val(ui.item.id);
}
if (jQuery(this).attr('data-update-elements')) {
var data = jQuery(this).data(ui.item.id.toString());
var update_elements = jQuery.parseJSON(jQuery(this).attr("data-update-elements"));
for (var key in update_elements) {
jQuery(update_elements[key]).val(data[key]);
}
}
}
var remember_string = this.value;
jQuery(this).bind('keyup.clearId', function(){
if(jQuery(this).val().trim() != remember_string.trim()){
jQuery(jQuery(this).attr('data-id-element')).val("");
jQuery(this).unbind('keyup.clearId');
}
});
jQuery(e).trigger('railsAutocomplete.select', ui);
return false;
}
});
}
});
jQuery(document).ready(function(){
jQuery('input[data-autocomplete]').railsAutocomplete();
});
})(jQuery);