(function ($) {
/**
* Attaches the autocomplete behavior to all required fields.
*/
Drupal.behaviors.autocomplete = {
attach: function (context, settings) {
var acdb = [];
$('input.autocomplete', context).once('autocomplete', function () {
var uri = this.value;
if (!acdb[uri]) {
acdb[uri] = new Drupal.ACDB(uri);
}
var $input = $('#' + this.id.substr(0, this.id.length - 13))
.attr('autocomplete', 'OFF')
.attr('aria-autocomplete', 'list');
$($input[0].form).submit(Drupal.autocompleteSubmit);
$input.parent()
.attr('role', 'application')
.append($('<span class="element-invisible" aria-live="assertive" aria-atomic="true"></span>')
.attr('id', $input.attr('id') + '-autocomplete-aria-live')
);
new Drupal.jsAC($input, acdb[uri]);
});
}
};
/**
* Prevents the form from submitting if the suggestions popup is open
* and closes the suggestions popup when doing so.
*/
Drupal.autocompleteSubmit = function () {
return $('#autocomplete').each(function () {
this.owner.hidePopup();
}).length == 0;
};
/**
* An AutoComplete object.
*/
Drupal.jsAC = function ($input, db) {
var ac = this;
this.input = $input[0];
this.ariaLive = $('#' + this.input.id + '-autocomplete-aria-live');
this.db = db;
$input
.keydown(function (event) { return ac.onkeydown(this, event); })
.keyup(function (event) { ac.onkeyup(this, event); })
.blur(function () { ac.hidePopup(); ac.db.cancel(); });
};
/**
* Handler for the "keydown" event.
*/
Drupal.jsAC.prototype.onkeydown = function (input, e) {
if (!e) {
e = window.event;
}
switch (e.keyCode) {
case 40: // down arrow.
this.selectDown();
return false;
case 38: // up arrow.
this.selectUp();
return false;
default: // All other keys.
return true;
}
};
/**
* Handler for the "keyup" event.
*/
Drupal.jsAC.prototype.onkeyup = function (input, e) {
if (!e) {
e = window.event;
}
switch (e.keyCode) {
case 16: // Shift.
case 17: // Ctrl.
case 18: // Alt.
case 20: // Caps lock.
case 33: // Page up.
case 34: // Page down.
case 35: // End.
case 36: // Home.
case 37: // Left arrow.
case 38: // Up arrow.
case 39: // Right arrow.
case 40: // Down arrow.
return true;
case 9: // Tab.
case 13: // Enter.
case 27: // Esc.
this.hidePopup(e.keyCode);
return true;
default: // All other keys.
if (input.value.length > 0 && !input.readOnly) {
this.populatePopup();
}
else {
this.hidePopup(e.keyCode);
}
return true;
}
};
/**
* Puts the currently highlighted suggestion into the autocomplete field.
*/
Drupal.jsAC.prototype.select = function (node) {
this.input.value = $(node).data('autocompleteValue');
$(this.input).trigger('autocompleteSelect', [node]);
};
/**
* Highlights the next suggestion.
*/
Drupal.jsAC.prototype.selectDown = function () {
if (this.selected && this.selected.nextSibling) {
this.highlight(this.selected.nextSibling);
}
else if (this.popup) {
var lis = $('li', this.popup);
if (lis.length > 0) {
this.highlight(lis.get(0));
}
}
};
/**
* Highlights the previous suggestion.
*/
Drupal.jsAC.prototype.selectUp = function () {
if (this.selected && this.selected.previousSibling) {
this.highlight(this.selected.previousSibling);
}
};
/**
* Highlights a suggestion.
*/
Drupal.jsAC.prototype.highlight = function (node) {
if (this.selected) {
$(this.selected).removeClass('selected');
}
$(node).addClass('selected');
this.selected = node;
$(this.ariaLive).html($(this.selected).html());
};
/**
* Unhighlights a suggestion.
*/
Drupal.jsAC.prototype.unhighlight = function (node) {
$(node).removeClass('selected');
this.selected = false;
$(this.ariaLive).empty();
};
/**
* Hides the autocomplete suggestions.
*/
Drupal.jsAC.prototype.hidePopup = function (keycode) {
// Select item if the right key or mousebutton was pressed.
if (this.selected && ((keycode && keycode != 46 && keycode != 8 && keycode != 27) || !keycode)) {
this.select(this.selected);
}
// Hide popup.
var popup = this.popup;
if (popup) {
this.popup = null;
$(popup).fadeOut('fast', function () { $(popup).remove(); });
}
this.selected = false;
$(this.ariaLive).empty();
};
/**
* Positions the suggestions popup and starts a search.
*/
Drupal.jsAC.prototype.populatePopup = function () {
var $input = $(this.input);
var position = $input.position();
// Show popup.
if (this.popup) {
$(this.popup).remove();
}
this.selected = false;
this.popup = $('<div id="autocomplete"></div>')[0];
this.popup.owner = this;
$(this.popup).css({
top: parseInt(position.top + this.input.offsetHeight, 10) + 'px',
left: parseInt(position.left, 10) + 'px',
width: $input.innerWidth() + 'px',
display: 'none'
});
$input.before(this.popup);
// Do search.
this.db.owner = this;
this.db.search(this.input.value);
};
/**
* Fills the suggestion popup with any matches received.
*/
Drupal.jsAC.prototype.found = function (matches) {
// If no value in the textfield, do not show the popup.
if (!this.input.value.length) {
return false;
}
// Prepare matches.
var ul = $('<ul></ul>');
var ac = this;
for (key in matches) {
$('<li></li>')
.html($('<div></div>').html(matches[key]))
.mousedown(function () { ac.hidePopup(this); })
.mouseover(function () { ac.highlight(this); })
.mouseout(function () { ac.unhighlight(this); })
.data('autocompleteValue', key)
.appendTo(ul);
}
// Show popup with matches, if any.
if (this.popup) {
if (ul.children().length) {
$(this.popup).empty().append(ul).show();
$(this.ariaLive).html(Drupal.t('Autocomplete popup'));
}
else {
$(this.popup).css({ visibility: 'hidden' });
this.hidePopup();
}
}
};
Drupal.jsAC.prototype.setStatus = function (status) {
switch (status) {
case 'begin':
$(this.input).addClass('throbbing');
$(this.ariaLive).html(Drupal.t('Searching for matches...'));
break;
case 'cancel':
case 'error':
case 'found':
$(this.input).removeClass('throbbing');
break;
}
};
/**
* An AutoComplete DataBase object.
*/
Drupal.ACDB = function (uri) {
this.uri = uri;
this.delay = 300;
this.cache = {};
};
/**
* Performs a cached and delayed search.
*/
Drupal.ACDB.prototype.search = function (searchString) {
var db = this;
this.searchString = searchString;
// See if this string needs to be searched for anyway. The pattern ../ is
// stripped since it may be misinterpreted by the browser.
searchString = searchString.replace(/^\s+|\.{2,}\/|\s+$/g, '');
// Skip empty search strings, or search strings ending with a comma, since
// that is the separator between search terms.
if (searchString.length <= 0 ||
searchString.charAt(searchString.length - 1) == ',') {
return;
}
// See if this key has been searched for before.
if (this.cache[searchString]) {
return this.owner.found(this.cache[searchString]);
}
// Initiate delayed search.
if (this.timer) {
clearTimeout(this.timer);
}
this.timer = setTimeout(function () {
db.owner.setStatus('begin');
// Ajax GET request for autocompletion. We use Drupal.encodePath instead of
// encodeURIComponent to allow autocomplete search terms to contain slashes.
$.ajax({
type: 'GET',
url: Drupal.sanitizeAjaxUrl(db.uri + '/' + Drupal.encodePath(searchString)),
dataType: 'json',
jsonp: false,
success: function (matches) {
if (typeof matches.status == 'undefined' || matches.status != 0) {
db.cache[searchString] = matches;
// Verify if these are still the matches the user wants to see.
if (db.searchString == searchString) {
db.owner.found(matches);
}
db.owner.setStatus('found');
}
},
error: function (xmlhttp) {
Drupal.displayAjaxError(Drupal.ajaxError(xmlhttp, db.uri));
}
});
}, this.delay);
};
/**
* Cancels the current autocomplete request.
*/
Drupal.ACDB.prototype.cancel = function () {
if (this.owner) this.owner.setStatus('cancel');
if (this.timer) clearTimeout(this.timer);
this.searchString = '';
};
})(jQuery);