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[mediawiki.git] / resources / src / mediawiki / mediawiki.searchSuggest.js

/*!
 * Add search suggestions to the search form.
 */
( function ( mw, $ ) {
        $( function () {
                var api, map, resultRenderCache, searchboxesSelectors,
                        // Region where the suggestions box will appear directly below
                        // (using the same width). Can be a container element or the input
                        // itself, depending on what suits best in the environment.
                        // For Vector the suggestion box should align with the simpleSearch
                        // container's borders, in other skins it should align with the input
                        // element (not the search form, as that would leave the buttons
                        // vertically between the input and the suggestions).
                        $searchRegion = $( '#simpleSearch, #searchInput' ).first(),
                        $searchInput = $( '#searchInput' );

                // Compatibility map
                map = {
                        // SimpleSearch is broken in Opera < 9.6
                        opera: [['>=', 9.6]],
                        // Older Konquerors are unable to position the suggestions correctly (bug 50805)
                        konqueror: [['>=', '4.11']],
                        docomo: false,
                        blackberry: false,
                        // Support for iOS 6 or higher. It has not been tested on iOS 5 or lower
                        ipod: [['>=', 6]],
                        iphone: [['>=', 6]]
                };

                if ( !$.client.test( map ) ) {
                        return;
                }

                // Compute form data for search suggestions functionality.
                function computeResultRenderCache( context ) {
                        var $form, baseHref, linkParams;

                        // Compute common parameters for links' hrefs
                        $form = context.config.$region.closest( 'form' );

                        baseHref = $form.attr( 'action' );
                        baseHref += baseHref.indexOf( '?' ) > -1 ? '&' : '?';

                        linkParams = $form.serializeObject();

                        return {
                                textParam: context.data.$textbox.attr( 'name' ),
                                linkParams: linkParams,
                                baseHref: baseHref
                        };
                }

                // The function used to render the suggestions.
                function renderFunction( text, context ) {
                        if ( !resultRenderCache ) {
                                resultRenderCache = computeResultRenderCache( context );
                        }

                        // linkParams object is modified and reused
                        resultRenderCache.linkParams[ resultRenderCache.textParam ] = text;

                        // this is the container <div>, jQueryfied
                        this.text( text )
                                .wrap(
                                        $( '<a>' )
                                                .attr( 'href', resultRenderCache.baseHref + $.param( resultRenderCache.linkParams ) )
                                                .attr( 'title', text )
                                                .addClass( 'mw-searchSuggest-link' )
                                );
                }

                function specialRenderFunction( query, context ) {
                        var $el = this;

                        if ( !resultRenderCache ) {
                                resultRenderCache = computeResultRenderCache( context );
                        }

                        // linkParams object is modified and reused
                        resultRenderCache.linkParams[ resultRenderCache.textParam ] = query;

                        if ( $el.children().length === 0 ) {
                                $el
                                        .append(
                                                $( '<div>' )
                                                        .addClass( 'special-label' )
                                                        .text( mw.msg( 'searchsuggest-containing' ) ),
                                                $( '<div>' )
                                                        .addClass( 'special-query' )
                                                        .text( query )
                                        )
                                        .show();
                        } else {
                                $el.find( '.special-query' )
                                        .text( query );
                        }

                        if ( $el.parent().hasClass( 'mw-searchSuggest-link' ) ) {
                                $el.parent().attr( 'href', resultRenderCache.baseHref + $.param( resultRenderCache.linkParams ) + '&fulltext=1' );
                        } else {
                                $el.wrap(
                                        $( '<a>' )
                                                .attr( 'href', resultRenderCache.baseHref + $.param( resultRenderCache.linkParams ) + '&fulltext=1' )
                                                .addClass( 'mw-searchSuggest-link' )
                                );
                        }
                }

                // Generic suggestions functionality for all search boxes
                searchboxesSelectors = [
                        // Primary searchbox on every page in standard skins
                        '#searchInput',
                        // Special:Search
                        '#powerSearchText',
                        '#searchText',
                        // Generic selector for skins with multiple searchboxes (used by CologneBlue)
                        // and for MediaWiki itself (special pages with page title inputs)
                        '.mw-searchInput'
                ];
                $( searchboxesSelectors.join( ', ' ) )
                        .suggestions( {
                                fetch: function ( query, response ) {
                                        var node = this[0];

                                        api = api || new mw.Api();

                                        $.data( node, 'request', api.get( {
                                                action: 'opensearch',
                                                search: query,
                                                namespace: 0,
                                                suggest: ''
                                        } ).done( function ( data ) {
                                                response( data[ 1 ] );
                                        } ) );
                                },
                                cancel: function () {
                                        var node = this[0],
                                                request = $.data( node, 'request' );

                                        if ( request ) {
                                                request.abort();
                                                $.removeData( node, 'request' );
                                        }
                                },
                                result: {
                                        render: renderFunction,
                                        select: function () {
                                                // allow the form to be submitted
                                                return true;
                                        }
                                },
                                cache: true,
                                highlightInput: true
                        } )
                        .bind( 'paste cut drop', function () {
                                // make sure paste and cut events from the mouse and drag&drop events
                                // trigger the keypress handler and cause the suggestions to update
                                $( this ).trigger( 'keypress' );
                        } )
                        // In most skins (at least Monobook and Vector), the font-size is messed up in <body>.
                        // (they use 2 elements to get a sane font-height). So, instead of making exceptions for
                        // each skin or adding more stylesheets, just copy it from the active element so auto-fit.
                        .each( function () {
                                var $this = $( this );
                                $this
                                        .data( 'suggestions-context' )
                                        .data.$container
                                                .css( 'fontSize', $this.css( 'fontSize' ) );
                        } );

                // Ensure that the thing is actually present!
                if ( $searchRegion.length === 0 ) {
                        // Don't try to set anything up if simpleSearch is disabled sitewide.
                        // The loader code loads us if the option is present, even if we're
                        // not actually enabled (anymore).
                        return;
                }

                // Special suggestions functionality for skin-provided search box
                $searchInput.suggestions( {
                        special: {
                                render: specialRenderFunction,
                                select: function ( $input ) {
                                        $input.closest( 'form' )
                                                .append( $( '<input type="hidden" name="fulltext" value="1"/>' ) );
                                        return true; // allow the form to be submitted
                                }
                        },
                        $region: $searchRegion
                } );

                // If the form includes any fallback fulltext search buttons, remove them
                $searchInput.closest( 'form' ).find( '.mw-fallbackSearchButton' ).remove();
        } );

}( mediaWiki, jQuery ) );