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329
drupal7/web/misc/autocomplete.js
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329
drupal7/web/misc/autocomplete.js
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(function ($) {
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/**
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* Attaches the autocomplete behavior to all required fields.
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*/
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Drupal.behaviors.autocomplete = {
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attach: function (context, settings) {
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var acdb = [];
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$('input.autocomplete', context).once('autocomplete', function () {
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var uri = this.value;
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if (!acdb[uri]) {
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acdb[uri] = new Drupal.ACDB(uri);
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}
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var $input = $('#' + this.id.substr(0, this.id.length - 13))
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.attr('autocomplete', 'OFF')
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.attr('aria-autocomplete', 'list');
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$($input[0].form).submit(Drupal.autocompleteSubmit);
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$input.parent()
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.attr('role', 'application')
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.append($('<span class="element-invisible" aria-live="assertive" aria-atomic="true"></span>')
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.attr('id', $input.attr('id') + '-autocomplete-aria-live')
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);
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new Drupal.jsAC($input, acdb[uri]);
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});
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}
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};
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/**
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* Prevents the form from submitting if the suggestions popup is open
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* and closes the suggestions popup when doing so.
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*/
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Drupal.autocompleteSubmit = function () {
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return $('#autocomplete').each(function () {
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this.owner.hidePopup();
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}).length == 0;
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};
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/**
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* An AutoComplete object.
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*/
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Drupal.jsAC = function ($input, db) {
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var ac = this;
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this.input = $input[0];
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this.ariaLive = $('#' + this.input.id + '-autocomplete-aria-live');
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this.db = db;
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$input
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.keydown(function (event) { return ac.onkeydown(this, event); })
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.keyup(function (event) { ac.onkeyup(this, event); })
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.blur(function () { ac.hidePopup(); ac.db.cancel(); });
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};
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/**
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* Handler for the "keydown" event.
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*/
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Drupal.jsAC.prototype.onkeydown = function (input, e) {
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if (!e) {
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e = window.event;
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}
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switch (e.keyCode) {
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case 40: // down arrow.
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this.selectDown();
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return false;
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case 38: // up arrow.
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this.selectUp();
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return false;
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default: // All other keys.
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return true;
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}
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};
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/**
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* Handler for the "keyup" event.
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*/
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Drupal.jsAC.prototype.onkeyup = function (input, e) {
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if (!e) {
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e = window.event;
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}
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switch (e.keyCode) {
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case 16: // Shift.
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case 17: // Ctrl.
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case 18: // Alt.
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case 20: // Caps lock.
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case 33: // Page up.
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case 34: // Page down.
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case 35: // End.
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case 36: // Home.
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case 37: // Left arrow.
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case 38: // Up arrow.
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case 39: // Right arrow.
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case 40: // Down arrow.
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return true;
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case 9: // Tab.
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case 13: // Enter.
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case 27: // Esc.
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this.hidePopup(e.keyCode);
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return true;
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default: // All other keys.
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if (input.value.length > 0 && !input.readOnly) {
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this.populatePopup();
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}
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else {
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this.hidePopup(e.keyCode);
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}
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return true;
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}
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};
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/**
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* Puts the currently highlighted suggestion into the autocomplete field.
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*/
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Drupal.jsAC.prototype.select = function (node) {
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this.input.value = $(node).data('autocompleteValue');
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$(this.input).trigger('autocompleteSelect', [node]);
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};
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/**
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* Highlights the next suggestion.
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*/
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Drupal.jsAC.prototype.selectDown = function () {
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if (this.selected && this.selected.nextSibling) {
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this.highlight(this.selected.nextSibling);
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}
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else if (this.popup) {
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var lis = $('li', this.popup);
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if (lis.length > 0) {
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this.highlight(lis.get(0));
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}
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}
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};
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/**
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* Highlights the previous suggestion.
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*/
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Drupal.jsAC.prototype.selectUp = function () {
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if (this.selected && this.selected.previousSibling) {
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this.highlight(this.selected.previousSibling);
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}
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};
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/**
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* Highlights a suggestion.
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*/
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Drupal.jsAC.prototype.highlight = function (node) {
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if (this.selected) {
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$(this.selected).removeClass('selected');
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}
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$(node).addClass('selected');
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this.selected = node;
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$(this.ariaLive).html($(this.selected).html());
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};
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/**
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* Unhighlights a suggestion.
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*/
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Drupal.jsAC.prototype.unhighlight = function (node) {
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$(node).removeClass('selected');
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this.selected = false;
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$(this.ariaLive).empty();
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};
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/**
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* Hides the autocomplete suggestions.
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*/
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Drupal.jsAC.prototype.hidePopup = function (keycode) {
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// Select item if the right key or mousebutton was pressed.
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if (this.selected && ((keycode && keycode != 46 && keycode != 8 && keycode != 27) || !keycode)) {
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this.select(this.selected);
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}
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// Hide popup.
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var popup = this.popup;
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if (popup) {
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this.popup = null;
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$(popup).fadeOut('fast', function () { $(popup).remove(); });
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}
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this.selected = false;
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$(this.ariaLive).empty();
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};
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/**
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* Positions the suggestions popup and starts a search.
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*/
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Drupal.jsAC.prototype.populatePopup = function () {
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var $input = $(this.input);
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var position = $input.position();
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// Show popup.
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if (this.popup) {
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$(this.popup).remove();
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}
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this.selected = false;
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this.popup = $('<div id="autocomplete"></div>')[0];
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this.popup.owner = this;
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$(this.popup).css({
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top: parseInt(position.top + this.input.offsetHeight, 10) + 'px',
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left: parseInt(position.left, 10) + 'px',
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width: $input.innerWidth() + 'px',
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display: 'none'
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});
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$input.before(this.popup);
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// Do search.
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this.db.owner = this;
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this.db.search(this.input.value);
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};
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/**
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* Fills the suggestion popup with any matches received.
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*/
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Drupal.jsAC.prototype.found = function (matches) {
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// If no value in the textfield, do not show the popup.
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if (!this.input.value.length) {
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return false;
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}
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// Prepare matches.
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var ul = $('<ul></ul>');
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var ac = this;
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for (key in matches) {
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$('<li></li>')
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.html($('<div></div>').html(matches[key]))
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.mousedown(function () { ac.hidePopup(this); })
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.mouseover(function () { ac.highlight(this); })
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.mouseout(function () { ac.unhighlight(this); })
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.data('autocompleteValue', key)
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.appendTo(ul);
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}
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// Show popup with matches, if any.
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if (this.popup) {
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if (ul.children().length) {
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$(this.popup).empty().append(ul).show();
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$(this.ariaLive).html(Drupal.t('Autocomplete popup'));
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}
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else {
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$(this.popup).css({ visibility: 'hidden' });
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this.hidePopup();
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}
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}
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};
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Drupal.jsAC.prototype.setStatus = function (status) {
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switch (status) {
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case 'begin':
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$(this.input).addClass('throbbing');
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$(this.ariaLive).html(Drupal.t('Searching for matches...'));
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break;
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case 'cancel':
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case 'error':
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case 'found':
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$(this.input).removeClass('throbbing');
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break;
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}
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};
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/**
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* An AutoComplete DataBase object.
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*/
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Drupal.ACDB = function (uri) {
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this.uri = uri;
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this.delay = 300;
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this.cache = {};
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};
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/**
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* Performs a cached and delayed search.
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*/
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Drupal.ACDB.prototype.search = function (searchString) {
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var db = this;
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this.searchString = searchString;
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// See if this string needs to be searched for anyway. The pattern ../ is
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// stripped since it may be misinterpreted by the browser.
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searchString = searchString.replace(/^\s+|\.{2,}\/|\s+$/g, '');
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// Skip empty search strings, or search strings ending with a comma, since
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// that is the separator between search terms.
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if (searchString.length <= 0 ||
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searchString.charAt(searchString.length - 1) == ',') {
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return;
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}
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// See if this key has been searched for before.
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if (this.cache[searchString]) {
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return this.owner.found(this.cache[searchString]);
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}
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// Initiate delayed search.
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if (this.timer) {
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clearTimeout(this.timer);
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}
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this.timer = setTimeout(function () {
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db.owner.setStatus('begin');
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// Ajax GET request for autocompletion. We use Drupal.encodePath instead of
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// encodeURIComponent to allow autocomplete search terms to contain slashes.
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$.ajax({
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type: 'GET',
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url: Drupal.sanitizeAjaxUrl(db.uri + '/' + Drupal.encodePath(searchString)),
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dataType: 'json',
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jsonp: false,
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success: function (matches) {
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if (typeof matches.status == 'undefined' || matches.status != 0) {
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db.cache[searchString] = matches;
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// Verify if these are still the matches the user wants to see.
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if (db.searchString == searchString) {
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db.owner.found(matches);
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}
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db.owner.setStatus('found');
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}
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},
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error: function (xmlhttp) {
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Drupal.displayAjaxError(Drupal.ajaxError(xmlhttp, db.uri));
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}
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});
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}, this.delay);
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};
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/**
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* Cancels the current autocomplete request.
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*/
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Drupal.ACDB.prototype.cancel = function () {
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if (this.owner) this.owner.setStatus('cancel');
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if (this.timer) clearTimeout(this.timer);
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this.searchString = '';
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};
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})(jQuery);
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