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This was mistakenly removed in [44537]. See #38922. Built from https://develop.svn.wordpress.org/trunk@44538 git-svn-id: http://core.svn.wordpress.org/trunk@44369 1a063a9b-81f0-0310-95a4-ce76da25c4cd
188 lines
5.1 KiB
JavaScript
188 lines
5.1 KiB
JavaScript
/**
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* Default settings for jQuery UI Autocomplete for use with non-hierarchical taxonomies.
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*
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* @output wp-admin/js/tags-suggest.js
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*/
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( function( $ ) {
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if ( typeof window.tagsSuggestL10n === 'undefined' || typeof window.uiAutocompleteL10n === 'undefined' ) {
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return;
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}
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var tempID = 0;
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var separator = window.tagsSuggestL10n.tagDelimiter || ',';
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function split( val ) {
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return val.split( new RegExp( separator + '\\s*' ) );
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}
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function getLast( term ) {
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return split( term ).pop();
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}
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/**
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* Add UI Autocomplete to an input or textarea element with presets for use
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* with non-hierarchical taxonomies.
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*
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* Example: `$( element ).wpTagsSuggest( options )`.
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*
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* The taxonomy can be passed in a `data-wp-taxonomy` attribute on the element or
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* can be in `options.taxonomy`.
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*
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* @since 4.7.0
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*
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* @param {object} options Options that are passed to UI Autocomplete. Can be used to override the default settings.
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* @returns {object} jQuery instance.
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*/
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$.fn.wpTagsSuggest = function( options ) {
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var cache;
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var last;
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var $element = $( this );
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options = options || {};
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var taxonomy = options.taxonomy || $element.attr( 'data-wp-taxonomy' ) || 'post_tag';
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delete( options.taxonomy );
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options = $.extend( {
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source: function( request, response ) {
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var term;
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if ( last === request.term ) {
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response( cache );
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return;
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}
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term = getLast( request.term );
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$.get( window.ajaxurl, {
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action: 'ajax-tag-search',
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tax: taxonomy,
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q: term
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} ).always( function() {
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$element.removeClass( 'ui-autocomplete-loading' ); // UI fails to remove this sometimes?
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} ).done( function( data ) {
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var tagName;
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var tags = [];
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if ( data ) {
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data = data.split( '\n' );
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for ( tagName in data ) {
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var id = ++tempID;
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tags.push({
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id: id,
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name: data[tagName]
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});
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}
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cache = tags;
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response( tags );
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} else {
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response( tags );
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}
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} );
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last = request.term;
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},
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focus: function( event, ui ) {
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$element.attr( 'aria-activedescendant', 'wp-tags-autocomplete-' + ui.item.id );
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// Don't empty the input field when using the arrow keys to
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// highlight items. See api.jqueryui.com/autocomplete/#event-focus
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event.preventDefault();
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},
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select: function( event, ui ) {
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var tags = split( $element.val() );
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// Remove the last user input.
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tags.pop();
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// Append the new tag and an empty element to get one more separator at the end.
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tags.push( ui.item.name, '' );
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$element.val( tags.join( separator + ' ' ) );
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if ( $.ui.keyCode.TAB === event.keyCode ) {
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// Audible confirmation message when a tag has been selected.
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window.wp.a11y.speak( window.tagsSuggestL10n.termSelected, 'assertive' );
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event.preventDefault();
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} else if ( $.ui.keyCode.ENTER === event.keyCode ) {
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// Do not close Quick Edit / Bulk Edit
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event.preventDefault();
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event.stopPropagation();
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}
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return false;
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},
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open: function() {
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$element.attr( 'aria-expanded', 'true' );
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},
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close: function() {
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$element.attr( 'aria-expanded', 'false' );
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},
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minLength: 2,
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position: {
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my: 'left top+2',
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at: 'left bottom',
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collision: 'none'
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},
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messages: {
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noResults: window.uiAutocompleteL10n.noResults,
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results: function( number ) {
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if ( number > 1 ) {
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return window.uiAutocompleteL10n.manyResults.replace( '%d', number );
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}
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return window.uiAutocompleteL10n.oneResult;
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}
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}
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}, options );
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$element.on( 'keydown', function() {
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$element.removeAttr( 'aria-activedescendant' );
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} )
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.autocomplete( options )
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.autocomplete( 'instance' )._renderItem = function( ul, item ) {
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return $( '<li role="option" id="wp-tags-autocomplete-' + item.id + '">' )
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.text( item.name )
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.appendTo( ul );
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};
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$element.attr( {
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'role': 'combobox',
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'aria-autocomplete': 'list',
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'aria-expanded': 'false',
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'aria-owns': $element.autocomplete( 'widget' ).attr( 'id' )
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} )
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.on( 'focus', function() {
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var inputValue = split( $element.val() ).pop();
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// Don't trigger a search if the field is empty.
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// Also, avoids screen readers announce `No search results`.
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if ( inputValue ) {
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$element.autocomplete( 'search' );
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}
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} )
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// Returns a jQuery object containing the menu element.
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.autocomplete( 'widget' )
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.addClass( 'wp-tags-autocomplete' )
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.attr( 'role', 'listbox' )
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.removeAttr( 'tabindex' ) // Remove the `tabindex=0` attribute added by jQuery UI.
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// Looks like Safari and VoiceOver need an `aria-selected` attribute. See ticket #33301.
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// The `menufocus` and `menublur` events are the same events used to add and remove
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// the `ui-state-focus` CSS class on the menu items. See jQuery UI Menu Widget.
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.on( 'menufocus', function( event, ui ) {
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ui.item.attr( 'aria-selected', 'true' );
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})
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.on( 'menublur', function() {
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// The `menublur` event returns an object where the item is `null`
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// so we need to find the active item with other means.
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$( this ).find( '[aria-selected="true"]' ).removeAttr( 'aria-selected' );
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});
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return this;
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};
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}( jQuery ) );
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