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/** * Generate the node required for filtering text * @returns {node} Filter control element * @param {object} oSettings dataTables settings object * @memberof DataTable#oApi */ function _fnFeatureHtmlFilter ( oSettings ) { var oPreviousSearch = oSettings.oPreviousSearch; var sSearchStr = oSettings.oLanguage.sSearch; sSearchStr = (sSearchStr.indexOf('_INPUT_') !== -1) ? sSearchStr.replace('_INPUT_', '<input type="text" />') : sSearchStr==="" ? '<input type="text" />' : sSearchStr+' <input type="text" />'; var nFilter = document.createElement( 'div' ); nFilter.className = oSettings.oClasses.sFilter; nFilter.innerHTML = '<label>'+sSearchStr+'</label>'; if ( !oSettings.aanFeatures.f ) { nFilter.id = oSettings.sTableId+'_filter'; } var jqFilter = $('input[type="text"]', nFilter); // Store a reference to the input element, so other input elements could be // added to the filter wrapper if needed (submit button for example) nFilter._DT_Input = jqFilter[0]; jqFilter.val( oPreviousSearch.sSearch.replace('"','"') ); jqFilter.bind( 'keyup.DT', function(e) { /* Update all other filter input elements for the new display */ var n = oSettings.aanFeatures.f; var val = this.value==="" ? "" : this.value; // mental IE8 fix :-( for ( var i=0, iLen=n.length ; i<iLen ; i++ ) { if ( n[i] != $(this).parents('div.dataTables_filter')[0] ) { $(n[i]._DT_Input).val( val ); } } /* Now do the filter */ if ( val != oPreviousSearch.sSearch ) { _fnFilterComplete( oSettings, { "sSearch": val, "bRegex": oPreviousSearch.bRegex, "bSmart": oPreviousSearch.bSmart , "bCaseInsensitive": oPreviousSearch.bCaseInsensitive } ); } } ); jqFilter .attr('aria-controls', oSettings.sTableId) .bind( 'keypress.DT', function(e) { /* Prevent form submission */ if ( e.keyCode == 13 ) { return false; } } ); return nFilter; } /** * Filter the table using both the global filter and column based filtering * @param {object} oSettings dataTables settings object * @param {object} oSearch search information * @param {int} [iForce] force a research of the master array (1) or not (undefined or 0) * @memberof DataTable#oApi */ function _fnFilterComplete ( oSettings, oInput, iForce ) { var oPrevSearch = oSettings.oPreviousSearch; var aoPrevSearch = oSettings.aoPreSearchCols; var fnSaveFilter = function ( oFilter ) { /* Save the filtering values */ oPrevSearch.sSearch = oFilter.sSearch; oPrevSearch.bRegex = oFilter.bRegex; oPrevSearch.bSmart = oFilter.bSmart; oPrevSearch.bCaseInsensitive = oFilter.bCaseInsensitive; }; /* In server-side processing all filtering is done by the server, so no point hanging around here */ if ( !oSettings.oFeatures.bServerSide ) { /* Global filter */ _fnFilter( oSettings, oInput.sSearch, iForce, oInput.bRegex, oInput.bSmart, oInput.bCaseInsensitive ); fnSaveFilter( oInput ); /* Now do the individual column filter */ for ( var i=0 ; i<oSettings.aoPreSearchCols.length ; i++ ) { _fnFilterColumn( oSettings, aoPrevSearch[i].sSearch, i, aoPrevSearch[i].bRegex, aoPrevSearch[i].bSmart, aoPrevSearch[i].bCaseInsensitive ); } /* Custom filtering */ _fnFilterCustom( oSettings ); } else { fnSaveFilter( oInput ); } /* Tell the draw function we have been filtering */ oSettings.bFiltered = true; $(oSettings.oInstance).trigger('filter', oSettings); /* Redraw the table */ oSettings._iDisplayStart = 0; _fnCalculateEnd( oSettings ); _fnDraw( oSettings ); /* Rebuild search array 'offline' */ _fnBuildSearchArray( oSettings, 0 ); } /** * Apply custom filtering functions * @param {object} oSettings dataTables settings object * @memberof DataTable#oApi */ function _fnFilterCustom( oSettings ) { var afnFilters = DataTable.ext.afnFiltering; var aiFilterColumns = _fnGetColumns( oSettings, 'bSearchable' ); for ( var i=0, iLen=afnFilters.length ; i<iLen ; i++ ) { var iCorrector = 0; for ( var j=0, jLen=oSettings.aiDisplay.length ; j<jLen ; j++ ) { var iDisIndex = oSettings.aiDisplay[j-iCorrector]; var bTest = afnFilters[i]( oSettings, _fnGetRowData( oSettings, iDisIndex, 'filter', aiFilterColumns ), iDisIndex ); /* Check if we should use this row based on the filtering function */ if ( !bTest ) { oSettings.aiDisplay.splice( j-iCorrector, 1 ); iCorrector++; } } } } /** * Filter the table on a per-column basis * @param {object} oSettings dataTables settings object * @param {string} sInput string to filter on * @param {int} iColumn column to filter * @param {bool} bRegex treat search string as a regular expression or not * @param {bool} bSmart use smart filtering or not * @param {bool} bCaseInsensitive Do case insenstive matching or not * @memberof DataTable#oApi */ function _fnFilterColumn ( oSettings, sInput, iColumn, bRegex, bSmart, bCaseInsensitive ) { if ( sInput === "" ) { return; } var iIndexCorrector = 0; var rpSearch = _fnFilterCreateSearch( sInput, bRegex, bSmart, bCaseInsensitive ); for ( var i=oSettings.aiDisplay.length-1 ; i>=0 ; i-- ) { var sData = _fnDataToSearch( _fnGetCellData( oSettings, oSettings.aiDisplay[i], iColumn, 'filter' ), oSettings.aoColumns[iColumn].sType ); if ( ! rpSearch.test( sData ) ) { oSettings.aiDisplay.splice( i, 1 ); iIndexCorrector++; } } } /** * Filter the data table based on user input and draw the table * @param {object} oSettings dataTables settings object * @param {string} sInput string to filter on * @param {int} iForce optional - force a research of the master array (1) or not (undefined or 0) * @param {bool} bRegex treat as a regular expression or not * @param {bool} bSmart perform smart filtering or not * @param {bool} bCaseInsensitive Do case insenstive matching or not * @memberof DataTable#oApi */ function _fnFilter( oSettings, sInput, iForce, bRegex, bSmart, bCaseInsensitive ) { var i; var rpSearch = _fnFilterCreateSearch( sInput, bRegex, bSmart, bCaseInsensitive ); var oPrevSearch = oSettings.oPreviousSearch; /* Check if we are forcing or not - optional parameter */ if ( !iForce ) { iForce = 0; } /* Need to take account of custom filtering functions - always filter */ if ( DataTable.ext.afnFiltering.length !== 0 ) { iForce = 1; } /* * If the input is blank - we want the full data set */ if ( sInput.length <= 0 ) { oSettings.aiDisplay.splice( 0, oSettings.aiDisplay.length); oSettings.aiDisplay = oSettings.aiDisplayMaster.slice(); } else { /* * We are starting a new search or the new search string is smaller * then the old one (i.e. delete). Search from the master array */ if ( oSettings.aiDisplay.length == oSettings.aiDisplayMaster.length || oPrevSearch.sSearch.length > sInput.length || iForce == 1 || sInput.indexOf(oPrevSearch.sSearch) !== 0 ) { /* Nuke the old display array - we are going to rebuild it */ oSettings.aiDisplay.splice( 0, oSettings.aiDisplay.length); /* Force a rebuild of the search array */ _fnBuildSearchArray( oSettings, 1 ); /* Search through all records to populate the search array * The the oSettings.aiDisplayMaster and asDataSearch arrays have 1 to 1 * mapping */ for ( i=0 ; i<oSettings.aiDisplayMaster.length ; i++ ) { if ( rpSearch.test(oSettings.asDataSearch[i]) ) { oSettings.aiDisplay.push( oSettings.aiDisplayMaster[i] ); } } } else { /* Using old search array - refine it - do it this way for speed * Don't have to search the whole master array again */ var iIndexCorrector = 0; /* Search the current results */ for ( i=0 ; i<oSettings.asDataSearch.length ; i++ ) { if ( ! rpSearch.test(oSettings.asDataSearch[i]) ) { oSettings.aiDisplay.splice( i-iIndexCorrector, 1 ); iIndexCorrector++; } } } } } /** * Create an array which can be quickly search through * @param {object} oSettings dataTables settings object * @param {int} iMaster use the master data array - optional * @memberof DataTable#oApi */ function _fnBuildSearchArray ( oSettings, iMaster ) { if ( !oSettings.oFeatures.bServerSide ) { /* Clear out the old data */ oSettings.asDataSearch = []; var aiFilterColumns = _fnGetColumns( oSettings, 'bSearchable' ); var aiIndex = (iMaster===1) ? oSettings.aiDisplayMaster : oSettings.aiDisplay; for ( var i=0, iLen=aiIndex.length ; i<iLen ; i++ ) { oSettings.asDataSearch[i] = _fnBuildSearchRow( oSettings, _fnGetRowData( oSettings, aiIndex[i], 'filter', aiFilterColumns ) ); } } } /** * Create a searchable string from a single data row * @param {object} oSettings dataTables settings object * @param {array} aData Row data array to use for the data to search * @memberof DataTable#oApi */ function _fnBuildSearchRow( oSettings, aData ) { var sSearch = aData.join(' '); /* If it looks like there is an HTML entity in the string, attempt to decode it */ if ( sSearch.indexOf('&') !== -1 ) { sSearch = $('<div>').html(sSearch).text(); } // Strip newline characters return sSearch.replace( /[\n\r]/g, " " ); } /** * Build a regular expression object suitable for searching a table * @param {string} sSearch string to search for * @param {bool} bRegex treat as a regular expression or not * @param {bool} bSmart perform smart filtering or not * @param {bool} bCaseInsensitive Do case insensitive matching or not * @returns {RegExp} constructed object * @memberof DataTable#oApi */ function _fnFilterCreateSearch( sSearch, bRegex, bSmart, bCaseInsensitive ) { var asSearch, sRegExpString; if ( bSmart ) { /* Generate the regular expression to use. Something along the lines of: * ^(?=.*?\bone\b)(?=.*?\btwo\b)(?=.*?\bthree\b).*$ */ asSearch = bRegex ? sSearch.split( ' ' ) : _fnEscapeRegex( sSearch ).split( ' ' ); sRegExpString = '^(?=.*?'+asSearch.join( ')(?=.*?' )+').*$'; return new RegExp( sRegExpString, bCaseInsensitive ? "i" : "" ); } else { sSearch = bRegex ? sSearch : _fnEscapeRegex( sSearch ); return new RegExp( sSearch, bCaseInsensitive ? "i" : "" ); } } /** * Convert raw data into something that the user can search on * @param {string} sData data to be modified * @param {string} sType data type * @returns {string} search string * @memberof DataTable#oApi */ function _fnDataToSearch ( sData, sType ) { if ( typeof DataTable.ext.ofnSearch[sType] === "function" ) { return DataTable.ext.ofnSearch[sType]( sData ); } else if ( sData === null ) { return ''; } else if ( sType == "html" ) { return sData.replace(/[\r\n]/g," ").replace( /<.*?>/g, "" ); } else if ( typeof sData === "string" ) { return sData.replace(/[\r\n]/g," "); } return sData; } /** * scape a string such that it can be used in a regular expression * @param {string} sVal string to escape * @returns {string} escaped string * @memberof DataTable#oApi */ function _fnEscapeRegex ( sVal ) { var acEscape = [ '/', '.', '*', '+', '?', '|', '(', ')', '[', ']', '{', '}', '\\', '$', '^', '-' ]; var reReplace = new RegExp( '(\\' + acEscape.join('|\\') + ')', 'g' ); return sVal.replace(reReplace, '\\$1'); }