mirror of
https://github.com/YunoHost-Apps/mediawiki_ynh.git
synced 2024-09-03 19:46:05 +02:00
631 lines
22 KiB
JavaScript
631 lines
22 KiB
JavaScript
/**
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* This plugin provides a generic way to add suggestions to a text box.
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*
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* Usage:
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*
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* Set options:
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* $( '#textbox' ).suggestions( { option1: value1, option2: value2 } );
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* $( '#textbox' ).suggestions( option, value );
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* Get option:
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* value = $( '#textbox' ).suggestions( option );
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* Initialize:
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* $( '#textbox' ).suggestions();
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*
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* Options:
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*
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* fetch(query): Callback that should fetch suggestions and set the suggestions property.
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* Executed in the context of the textbox
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* Type: Function
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* cancel: Callback function to call when any pending asynchronous suggestions fetches
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* should be canceled. Executed in the context of the textbox
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* Type: Function
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* special: Set of callbacks for rendering and selecting
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* Type: Object of Functions 'render' and 'select'
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* result: Set of callbacks for rendering and selecting
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* Type: Object of Functions 'render' and 'select'
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* $region: jQuery selection of element to place the suggestions below and match width of
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* Type: jQuery Object, Default: $(this)
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* suggestions: Suggestions to display
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* Type: Array of strings
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* maxRows: Maximum number of suggestions to display at one time
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* Type: Number, Range: 1 - 100, Default: 7
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* delay: Number of ms to wait for the user to stop typing
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* Type: Number, Range: 0 - 1200, Default: 120
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* submitOnClick: Whether to submit the form containing the textbox when a suggestion is clicked
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* Type: Boolean, Default: false
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* maxExpandFactor: Maximum suggestions box width relative to the textbox width. If set
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* to e.g. 2, the suggestions box will never be grown beyond 2 times the width of the textbox.
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* Type: Number, Range: 1 - infinity, Default: 3
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* expandFrom: Which direction to offset the suggestion box from.
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* Values 'start' and 'end' translate to left and right respectively depending on the
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* directionality of the current document, according to $( 'html' ).css( 'direction' ).
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* Type: String, default: 'auto', options: 'left', 'right', 'start', 'end', 'auto'.
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* positionFromLeft: Sets expandFrom=left, for backwards compatibility
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* Type: Boolean, Default: true
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* highlightInput: Whether to hightlight matched portions of the input or not
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* Type: Boolean, Default: false
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*/
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( function ( $ ) {
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$.suggestions = {
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/**
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* Cancel any delayed maybeFetch() call and callback the context so
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* they can cancel any async fetching if they use AJAX or something.
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*/
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cancel: function ( context ) {
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if ( context.data.timerID !== null ) {
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clearTimeout( context.data.timerID );
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}
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if ( $.isFunction( context.config.cancel ) ) {
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context.config.cancel.call( context.data.$textbox );
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}
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},
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/**
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* Restore the text the user originally typed in the textbox, before it
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* was overwritten by highlight(). This restores the value the currently
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* displayed suggestions are based on, rather than the value just before
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* highlight() overwrote it; the former is arguably slightly more sensible.
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*/
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restore: function ( context ) {
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context.data.$textbox.val( context.data.prevText );
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},
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/**
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* Ask the user-specified callback for new suggestions. Any previous delayed
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* call to this function still pending will be canceled. If the value in the
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* textbox is empty or hasn't changed since the last time suggestions were fetched,
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* this function does nothing.
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* @param {Boolean} delayed Whether or not to delay this by the currently configured amount of time
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*/
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update: function ( context, delayed ) {
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// Only fetch if the value in the textbox changed and is not empty, or if the results were hidden
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// if the textbox is empty then clear the result div, but leave other settings intouched
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function maybeFetch() {
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if ( context.data.$textbox.val().length === 0 ) {
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context.data.$container.hide();
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context.data.prevText = '';
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} else if (
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context.data.$textbox.val() !== context.data.prevText ||
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!context.data.$container.is( ':visible' )
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) {
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if ( typeof context.config.fetch === 'function' ) {
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context.data.prevText = context.data.$textbox.val();
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context.config.fetch.call( context.data.$textbox, context.data.$textbox.val() );
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}
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}
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}
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// Cancels any delayed maybeFetch call, and invokes context.config.cancel.
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$.suggestions.cancel( context );
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if ( delayed ) {
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// To avoid many started/aborted requests while typing, we're gonna take a short
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// break before trying to fetch data.
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context.data.timerID = setTimeout( maybeFetch, context.config.delay );
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} else {
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maybeFetch();
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}
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$.suggestions.special( context );
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},
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special: function ( context ) {
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// Allow custom rendering - but otherwise don't do any rendering
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if ( typeof context.config.special.render === 'function' ) {
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// Wait for the browser to update the value
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setTimeout( function () {
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// Render special
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var $special = context.data.$container.find( '.suggestions-special' );
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context.config.special.render.call( $special, context.data.$textbox.val(), context );
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}, 1 );
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}
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},
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/**
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* Sets the value of a property, and updates the widget accordingly
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* @param property String Name of property
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* @param value Mixed Value to set property with
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*/
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configure: function ( context, property, value ) {
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var newCSS,
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$autoEllipseMe, $result, $results, childrenWidth,
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i, expWidth, matchedText, maxWidth, text;
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// Validate creation using fallback values
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switch( property ) {
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case 'fetch':
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case 'cancel':
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case 'special':
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case 'result':
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case '$region':
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case 'expandFrom':
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context.config[property] = value;
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break;
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case 'suggestions':
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context.config[property] = value;
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// Update suggestions
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if ( context.data !== undefined ) {
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if ( context.data.$textbox.val().length === 0 ) {
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// Hide the div when no suggestion exist
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context.data.$container.hide();
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} else {
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// Rebuild the suggestions list
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context.data.$container.show();
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// Update the size and position of the list
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newCSS = {
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top: context.config.$region.offset().top + context.config.$region.outerHeight(),
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bottom: 'auto',
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width: context.config.$region.outerWidth(),
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height: 'auto'
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};
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// Process expandFrom, after this it is set to left or right.
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context.config.expandFrom = ( function ( expandFrom ) {
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var regionWidth, docWidth, regionCenter, docCenter,
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docDir = $( document.documentElement ).css( 'direction' ),
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$region = context.config.$region;
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// Backwards compatible
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if ( context.config.positionFromLeft ) {
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expandFrom = 'left';
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// Catch invalid values, default to 'auto'
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} else if ( $.inArray( expandFrom, ['left', 'right', 'start', 'end', 'auto'] ) === -1 ) {
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expandFrom = 'auto';
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}
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if ( expandFrom === 'auto' ) {
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if ( $region.data( 'searchsuggest-expand-dir' ) ) {
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// If the markup explicitly contains a direction, use it.
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expandFrom = $region.data( 'searchsuggest-expand-dir' );
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} else {
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regionWidth = $region.outerWidth();
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docWidth = $( document ).width();
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if ( ( regionWidth / docWidth ) > 0.85 ) {
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// If the input size takes up more than 85% of the document horizontally
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// expand the suggestions to the writing direction's native end.
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expandFrom = 'start';
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} else {
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// Calculate the center points of the input and document
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regionCenter = $region.offset().left + regionWidth / 2;
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docCenter = docWidth / 2;
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if ( Math.abs( regionCenter - docCenter ) / docCenter < 0.10 ) {
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// If the input's center is within 10% of the document center
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// use the writing direction's native end.
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expandFrom = 'start';
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} else {
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// Otherwise expand the input from the closest side of the page,
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// towards the side of the page with the most free open space
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expandFrom = regionCenter > docCenter ? 'right' : 'left';
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}
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}
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}
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}
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if ( expandFrom === 'start' ) {
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expandFrom = docDir === 'rtl' ? 'right': 'left';
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} else if ( expandFrom === 'end' ) {
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expandFrom = docDir === 'rtl' ? 'left': 'right';
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}
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return expandFrom;
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}( context.config.expandFrom ) );
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if ( context.config.expandFrom === 'left' ) {
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// Expand from left
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newCSS.left = context.config.$region.offset().left;
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newCSS.right = 'auto';
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} else {
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// Expand from right
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newCSS.left = 'auto';
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newCSS.right = $( document ).width() - ( context.config.$region.offset().left + context.config.$region.outerWidth() );
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}
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context.data.$container.css( newCSS );
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$results = context.data.$container.children( '.suggestions-results' );
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$results.empty();
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expWidth = -1;
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$autoEllipseMe = $( [] );
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matchedText = null;
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for ( i = 0; i < context.config.suggestions.length; i++ ) {
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/*jshint loopfunc:true */
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text = context.config.suggestions[i];
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$result = $( '<div>' )
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.addClass( 'suggestions-result' )
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.attr( 'rel', i )
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.data( 'text', context.config.suggestions[i] )
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.mousemove( function () {
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context.data.selectedWithMouse = true;
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$.suggestions.highlight(
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context,
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$(this).closest( '.suggestions-results .suggestions-result' ),
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false
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);
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} )
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.appendTo( $results );
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// Allow custom rendering
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if ( typeof context.config.result.render === 'function' ) {
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context.config.result.render.call( $result, context.config.suggestions[i], context );
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} else {
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// Add <span> with text
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$result.append( $( '<span>' )
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.css( 'whiteSpace', 'nowrap' )
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.text( text )
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);
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}
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if ( context.config.highlightInput ) {
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matchedText = context.data.prevText;
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}
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// Widen results box if needed
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// New width is only calculated here, applied later
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childrenWidth = $result.children().outerWidth();
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if ( childrenWidth > $result.width() && childrenWidth > expWidth ) {
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// factor in any padding, margin, or border space on the parent
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expWidth = childrenWidth + ( context.data.$container.width() - $result.width() );
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}
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$autoEllipseMe = $autoEllipseMe.add( $result );
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}
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// Apply new width for results box, if any
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if ( expWidth > context.data.$container.width() ) {
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maxWidth = context.config.maxExpandFactor*context.data.$textbox.width();
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context.data.$container.width( Math.min( expWidth, maxWidth ) );
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}
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// autoEllipse the results. Has to be done after changing the width
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$autoEllipseMe.autoEllipsis( {
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hasSpan: true,
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tooltip: true,
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matchText: matchedText
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} );
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}
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}
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break;
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case 'maxRows':
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context.config[property] = Math.max( 1, Math.min( 100, value ) );
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break;
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case 'delay':
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context.config[property] = Math.max( 0, Math.min( 1200, value ) );
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break;
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case 'maxExpandFactor':
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context.config[property] = Math.max( 1, value );
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break;
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case 'submitOnClick':
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case 'positionFromLeft':
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case 'highlightInput':
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context.config[property] = value ? true : false;
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break;
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}
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},
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/**
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* Highlight a result in the results table
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* @param result <tr> to highlight: jQuery object, or 'prev' or 'next'
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* @param updateTextbox If true, put the suggestion in the textbox
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*/
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highlight: function ( context, result, updateTextbox ) {
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var selected = context.data.$container.find( '.suggestions-result-current' );
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if ( !result.get || selected.get( 0 ) !== result.get( 0 ) ) {
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if ( result === 'prev' ) {
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if( selected.hasClass( 'suggestions-special' ) ) {
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result = context.data.$container.find( '.suggestions-result:last' );
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} else {
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result = selected.prev();
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if ( !( result.length && result.hasClass( 'suggestions-result' ) ) ) {
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// there is something in the DOM between selected element and the wrapper, bypass it
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result = selected.parents( '.suggestions-results > *' ).prev().find( '.suggestions-result' ).eq(0);
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}
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if ( selected.length === 0 ) {
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// we are at the beginning, so lets jump to the last item
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if ( context.data.$container.find( '.suggestions-special' ).html() !== '' ) {
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result = context.data.$container.find( '.suggestions-special' );
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} else {
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result = context.data.$container.find( '.suggestions-results .suggestions-result:last' );
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}
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}
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}
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} else if ( result === 'next' ) {
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if ( selected.length === 0 ) {
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// No item selected, go to the first one
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result = context.data.$container.find( '.suggestions-results .suggestions-result:first' );
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if ( result.length === 0 && context.data.$container.find( '.suggestions-special' ).html() !== '' ) {
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// No suggestion exists, go to the special one directly
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result = context.data.$container.find( '.suggestions-special' );
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}
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} else {
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result = selected.next();
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if ( !( result.length && result.hasClass( 'suggestions-result' ) ) ) {
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// there is something in the DOM between selected element and the wrapper, bypass it
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result = selected.parents( '.suggestions-results > *' ).next().find( '.suggestions-result' ).eq(0);
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}
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if ( selected.hasClass( 'suggestions-special' ) ) {
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result = $( [] );
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} else if (
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result.length === 0 &&
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context.data.$container.find( '.suggestions-special' ).html() !== ''
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) {
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// We were at the last item, jump to the specials!
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result = context.data.$container.find( '.suggestions-special' );
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}
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}
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}
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selected.removeClass( 'suggestions-result-current' );
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result.addClass( 'suggestions-result-current' );
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}
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if ( updateTextbox ) {
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if ( result.length === 0 || result.is( '.suggestions-special' ) ) {
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$.suggestions.restore( context );
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} else {
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context.data.$textbox.val( result.data( 'text' ) );
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// .val() doesn't call any event handlers, so
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// let the world know what happened
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context.data.$textbox.change();
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}
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context.data.$textbox.trigger( 'change' );
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}
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},
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/**
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* Respond to keypress event
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* @param key Integer Code of key pressed
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*/
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keypress: function ( e, context, key ) {
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var selected,
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wasVisible = context.data.$container.is( ':visible' ),
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preventDefault = false;
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switch ( key ) {
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// Arrow down
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case 40:
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if ( wasVisible ) {
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$.suggestions.highlight( context, 'next', true );
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context.data.selectedWithMouse = false;
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} else {
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$.suggestions.update( context, false );
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}
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preventDefault = true;
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break;
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// Arrow up
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case 38:
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if ( wasVisible ) {
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$.suggestions.highlight( context, 'prev', true );
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context.data.selectedWithMouse = false;
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}
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preventDefault = wasVisible;
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break;
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// Escape
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case 27:
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context.data.$container.hide();
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$.suggestions.restore( context );
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$.suggestions.cancel( context );
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context.data.$textbox.trigger( 'change' );
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preventDefault = wasVisible;
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break;
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// Enter
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case 13:
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context.data.$container.hide();
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preventDefault = wasVisible;
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selected = context.data.$container.find( '.suggestions-result-current' );
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if ( selected.length === 0 || context.data.selectedWithMouse ) {
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// if nothing is selected OR if something was selected with the mouse,
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// cancel any current requests and submit the form
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$.suggestions.cancel( context );
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context.config.$region.closest( 'form' ).submit();
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} else if ( selected.is( '.suggestions-special' ) ) {
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if ( typeof context.config.special.select === 'function' ) {
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context.config.special.select.call( selected, context.data.$textbox );
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}
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} else {
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if ( typeof context.config.result.select === 'function' ) {
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$.suggestions.highlight( context, selected, true );
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context.config.result.select.call( selected, context.data.$textbox );
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} else {
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$.suggestions.highlight( context, selected, true );
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}
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}
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break;
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default:
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$.suggestions.update( context, true );
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break;
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}
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if ( preventDefault ) {
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e.preventDefault();
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e.stopImmediatePropagation();
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}
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}
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};
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$.fn.suggestions = function () {
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// Multi-context fields
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var returnValue,
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args = arguments;
|
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$(this).each( function () {
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var context, key;
|
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|
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/* Construction / Loading */
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context = $(this).data( 'suggestions-context' );
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if ( context === undefined || context === null ) {
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context = {
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config: {
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fetch: function () {},
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cancel: function () {},
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special: {},
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result: {},
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$region: $(this),
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suggestions: [],
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maxRows: 7,
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delay: 120,
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submitOnClick: false,
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maxExpandFactor: 3,
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expandFrom: 'auto',
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highlightInput: false
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}
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};
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}
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|
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/* API */
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// Handle various calling styles
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if ( args.length > 0 ) {
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if ( typeof args[0] === 'object' ) {
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// Apply set of properties
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for ( key in args[0] ) {
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$.suggestions.configure( context, key, args[0][key] );
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}
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} else if ( typeof args[0] === 'string' ) {
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if ( args.length > 1 ) {
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// Set property values
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$.suggestions.configure( context, args[0], args[1] );
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} else if ( returnValue === null || returnValue === undefined ) {
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// Get property values, but don't give access to internal data - returns only the first
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returnValue = ( args[0] in context.config ? undefined : context.config[args[0]] );
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}
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}
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}
|
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|
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/* Initialization */
|
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if ( context.data === undefined ) {
|
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context.data = {
|
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// ID of running timer
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timerID: null,
|
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|
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// Text in textbox when suggestions were last fetched
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prevText: null,
|
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|
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// Number of results visible without scrolling
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visibleResults: 0,
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|
|
// Suggestion the last mousedown event occured on
|
|
mouseDownOn: $( [] ),
|
|
$textbox: $(this),
|
|
selectedWithMouse: false
|
|
};
|
|
|
|
context.data.$container = $( '<div>' )
|
|
.css( 'display', 'none' )
|
|
.addClass( 'suggestions' )
|
|
.append(
|
|
$( '<div>' ).addClass( 'suggestions-results' )
|
|
// Can't use click() because the container div is hidden when the
|
|
// textbox loses focus. Instead, listen for a mousedown followed
|
|
// by a mouseup on the same div.
|
|
.mousedown( function ( e ) {
|
|
context.data.mouseDownOn = $( e.target ).closest( '.suggestions-results .suggestions-result' );
|
|
} )
|
|
.mouseup( function ( e ) {
|
|
var $result = $( e.target ).closest( '.suggestions-results .suggestions-result' ),
|
|
$other = context.data.mouseDownOn;
|
|
|
|
context.data.mouseDownOn = $( [] );
|
|
if ( $result.get( 0 ) !== $other.get( 0 ) ) {
|
|
return;
|
|
}
|
|
// do not interfere with non-left clicks or if modifier keys are pressed (e.g. ctrl-click)
|
|
if ( !( e.which !== 1 || e.altKey || e.ctrlKey || e.shiftKey || e.metaKey ) ) {
|
|
$.suggestions.highlight( context, $result, true );
|
|
context.data.$container.hide();
|
|
if ( typeof context.config.result.select === 'function' ) {
|
|
context.config.result.select.call( $result, context.data.$textbox );
|
|
}
|
|
}
|
|
// but still restore focus to the textbox, so that the suggestions will be hidden properly
|
|
context.data.$textbox.focus();
|
|
} )
|
|
)
|
|
.append(
|
|
$( '<div>' ).addClass( 'suggestions-special' )
|
|
// Can't use click() because the container div is hidden when the
|
|
// textbox loses focus. Instead, listen for a mousedown followed
|
|
// by a mouseup on the same div.
|
|
.mousedown( function ( e ) {
|
|
context.data.mouseDownOn = $( e.target ).closest( '.suggestions-special' );
|
|
} )
|
|
.mouseup( function ( e ) {
|
|
var $special = $( e.target ).closest( '.suggestions-special' ),
|
|
$other = context.data.mouseDownOn;
|
|
|
|
context.data.mouseDownOn = $( [] );
|
|
if ( $special.get( 0 ) !== $other.get( 0 ) ) {
|
|
return;
|
|
}
|
|
// do not interfere with non-left clicks or if modifier keys are pressed (e.g. ctrl-click)
|
|
if ( !( e.which !== 1 || e.altKey || e.ctrlKey || e.shiftKey || e.metaKey ) ) {
|
|
context.data.$container.hide();
|
|
if ( typeof context.config.special.select === 'function' ) {
|
|
context.config.special.select.call( $special, context.data.$textbox );
|
|
}
|
|
}
|
|
// but still restore focus to the textbox, so that the suggestions will be hidden properly
|
|
context.data.$textbox.focus();
|
|
} )
|
|
.mousemove( function ( e ) {
|
|
context.data.selectedWithMouse = true;
|
|
$.suggestions.highlight(
|
|
context, $( e.target ).closest( '.suggestions-special' ), false
|
|
);
|
|
} )
|
|
)
|
|
.appendTo( $( 'body' ) );
|
|
|
|
$(this)
|
|
// Stop browser autocomplete from interfering
|
|
.attr( 'autocomplete', 'off')
|
|
.keydown( function ( e ) {
|
|
// Store key pressed to handle later
|
|
context.data.keypressed = e.which;
|
|
context.data.keypressedCount = 0;
|
|
|
|
switch ( context.data.keypressed ) {
|
|
// This preventDefault logic is duplicated from
|
|
// $.suggestions.keypress(), which sucks
|
|
// Arrow down
|
|
case 40:
|
|
e.preventDefault();
|
|
e.stopImmediatePropagation();
|
|
break;
|
|
// Arrow up, Escape and Enter
|
|
case 38:
|
|
case 27:
|
|
case 13:
|
|
if ( context.data.$container.is( ':visible' ) ) {
|
|
e.preventDefault();
|
|
e.stopImmediatePropagation();
|
|
}
|
|
}
|
|
} )
|
|
.keypress( function ( e ) {
|
|
context.data.keypressedCount++;
|
|
$.suggestions.keypress( e, context, context.data.keypressed );
|
|
} )
|
|
.keyup( function ( e ) {
|
|
// Some browsers won't throw keypress() for arrow keys. If we got a keydown and a keyup without a
|
|
// keypress in between, solve it
|
|
if ( context.data.keypressedCount === 0 ) {
|
|
$.suggestions.keypress( e, context, context.data.keypressed );
|
|
}
|
|
} )
|
|
.blur( function () {
|
|
// When losing focus because of a mousedown
|
|
// on a suggestion, don't hide the suggestions
|
|
if ( context.data.mouseDownOn.length > 0 ) {
|
|
return;
|
|
}
|
|
context.data.$container.hide();
|
|
$.suggestions.cancel( context );
|
|
} );
|
|
}
|
|
|
|
// Store the context for next time
|
|
$(this).data( 'suggestions-context', context );
|
|
} );
|
|
return returnValue !== undefined ? returnValue : $(this);
|
|
};
|
|
|
|
}( jQuery ) );
|