// ---------------------------------------------------------------------------- // Zoom Search Engine 2.0 (25/8/2003) // // This file (search.js) is the JavaScript search front-end for client side // searches using index files created by the Zoom Search Engine Indexer. // // email: zoom@wrensoft.com // www: http://www.wrensoft.com // // Copyright (C) Wrensoft 2000-2003 // // This script performs client-side searching with the index data file // (zoom_index.js) generated by the Zoom Search Engine Indexer. It allows you // to run searches on mediums such as CD-ROMs, or other local data, where a // web server is not available. // // We recommend against using client-side searches for online websites because // it requires the entire index data file to be downloaded onto the user's // local machine. This can be very slow for large websites, and our server-side // search scripts (search.php and search.asp) are far better suited for this. // However, JavaScript is still an option for smaller websites in a limited // hosting situation (eg: no php or asp) // ---------------------------------------------------------------------------- // ---------------------------------------------------------------------------- // Settings (change if necessary) // ---------------------------------------------------------------------------- // Highlight matched words in results var Highlighting = 0; // 0 = off, 1 = on var HighlightColor = "#FFFF40"; // Highlight colour // The options available in the dropdown menu for number of results // per page var PerPageOptions = new Array(10, 20, 50, 100); var FormFormat = 0; //0 = No search form (note that you must pass parameters to // the script directly from elsewhere on your website). //1 = Basic search form //2 = Advanced search form (with options) var OutputStyle = 1; //0 = Basic Style, Page Title, Score and URL //1 = Descriptive Style, Match number, Page Title, // Page description, Score and URL var ZoomInfo = 1; //0 = Don't display Zoom info line at bottom of search //1 = Display Zoom info line at bottom of search var WordSplit = 1; //0 = Only split input search phrase into words when a // Space character is found //1 = Split input search phrase at Space ' ', // UnderScore '_' , Dash '-' and Plus '+' characters // ---------------------------------------------------------------------------- // Helper Functions // ---------------------------------------------------------------------------- // This function will return the value of a GET parameter function getParam(paramName) { paramStr = document.location.search; if (paramStr == "") return ""; // remove '?' in front of paramStr if (paramStr.charAt(0) == "?") paramStr = paramStr.substring(1, paramStr.length); arg = (paramStr.split("&")); for (i=0; i < arg.length; i++) { arg_values = arg[i].split("=") if (unescape(arg_values[0]) == paramName) { return unescape(arg_values[1]); } } return; } // Compares the two values, used for sorting output results // Results that match all search terms are put first, highest score function SortCompare (a, b) { if (a[2] < b[2]) return 1; else if (a[2] > b[2]) return -1; else if (a[1] < b[1]) return 1; else if (a[1] > b[1]) return -1; else return 0; } function pattern2regexp(pattern) { pattern = pattern.replace(/\*/g, ".*"); pattern = pattern.replace(/\?/g, ".?"); return "^" + pattern + "$"; } function HighlightDescription(line) { res = line; for (i = 0; i < matchwords_num; i++) { // replace with marker text, assumes [;:] and [:;] is not the search text... res = res.replace(new RegExp("\\b("+matchwords[i]+")\\b", "gi"), "[;:]$1[:;]"); } // replace the marker text with the html text // this is to avoid finding previous 'ed text. res = res.replace(/\[;:\]/g, ""); res = res.replace(/\[:;\]/g, ""); return res; } // ---------------------------------------------------------------------------- // Parameters initialisation (globals) // ---------------------------------------------------------------------------- var query = getParam("zoom_query"); query = query.replace(/\+/g, " "); // replace the '+' with spaces var per_page = parseInt(getParam("zoom_per_page")); if (isNaN(per_page)) per_page = 10; var page = parseInt(getParam("zoom_page")); if (isNaN(page)) page = 1; var andq = parseInt(getParam("zoom_and")); if (isNaN(andq)) andq = 0; var searchWords = new Array(); var data = new Array(); var output = new Array(); if (Highlighting == 1) { var matchwords = new Array(); var matchwords_num = 0; } // ---------------------------------------------------------------------------- // Main search function starts here // ---------------------------------------------------------------------------- function ZoomSearch() { // Display the form if (FormFormat > 0) { document.writeln("
"); document.writeln(""); document.writeln(""); if (FormFormat == 2) { document.writeln("Results per page:"); document.writeln("

"); document.writeln("Match: "); if (andq == 0) { document.writeln("any search words"); document.writeln("all search words"); } else { document.writeln("any search words"); document.writeln("all search words"); } document.writeln(""); } document.writeln("
"); } // give up early if no search words provided if (query.length == 0) { //document.writeln("No search query entered.
"); if (ZoomInfo == 1) document.writeln(); return; } if (WordSplit == 1) query = query.replace(/[+-_]/g, " "); // replace '+', '-', '_' with spaces. // split search phrase into words searchWords = query.split(" "); // split by spaces. document.writeln("Search Results for \"" + query + "\"

"); numwords = searchWords.length; kw_ptr = 0; outputline = 0; usewildcards = 0; ipage = 0; for (sw = 0; sw < numwords; sw++) { re = new RegExp(pattern2regexp(searchWords[sw]), "gi"); for (kw_ptr = 0; kw_ptr < keywords.length; kw_ptr++) { data = keywords[kw_ptr].split(","); //match_result = searchWords[sw] == data[0]; match_result = data[0].search(re); if (match_result != -1) { // keyword found, include it in the output list if (Highlighting == 1) { // Add to matched words list // Check if its already in the list for (i = 0; i < matchwords.length && matchwords[i] != data[0]; i++); if (i == matchwords.length) // not in list matchwords_num = matchwords.push(data[0]); } for (kw = 1; kw < data.length; kw += 2) { // check if page is already in output list pageexists = 0; ipage = data[kw]; for (ol = 0; ol < outputline; ol++) { if (output[ol][0] == ipage) { // page is already in output list so add to count and extra if (output[ol][1] > 10000) { // take it easy if its too big (to prevent huge scores) output[ol][1] += 1; } else { output[ol][1] += parseInt(data[kw+1]); // add in score output[ol][1] *= 2; // double score as we have two words matching } output[ol][2] += 1; // increase word match count pageexists = 1; } } if (pageexists == 0) { // new page to add to list // create 3 fields for each output output[outputline] = new Array(0,0,0); // now fill in the values for each field output[outputline][0] = ipage; // page index output[outputline][1] = parseInt(data[kw+1]); // score output[outputline][2] = 1; // single word match only outputline++; } } // if (useWildCards == 0) //break; // this search word was found, so skip to next } // return to start of keywords list... } } // Get number of pages matched matches = outputline; // Sort results in order of score, use "SortCompare" function if (matches > 1) output.sort(SortCompare); // Count number of output lines that match ALL search terms oline = 0; fullmatches = 0; if (numwords > 1) { while ((oline < matches)) { if (output[oline][2] == numwords) { fullmatches++; } oline++; } if (andq == 1) matches = fullmatches; } //Display search result information document.writeln(""); if (matches == 1) document.writeln("1 result found.
"); else if (matches == 0) document.writeln("No results found.
"); else if (numwords > 1 && andq == 0) { //OR SomeTermMatches = matches - fullmatches; document.writeln("" + fullmatches + " pages found containing all search terms.
"); if (SomeTermMatches > 0) document.writeln("" + SomeTermMatches + " pages found containing some search terms."); document.writeln(""); } else if (numwords > 1 && andq == 1) //AND document.writeln("" + fullmatches + " pages found containing all search terms.
"); else document.writeln("" + matches + " results found.
"); document.writeln("\n"); // number of pages of results num_pages = Math.ceil(matches / per_page); if (num_pages > 1) document.writeln("
" + num_pages + " pages of results.
\n"); // determine current line of result from the output array if (page == 1) { arrayline = 0; out_counter = 0; outStartsAt = 0; } else { //arrayline = ((page - 1) * per_page); arrayline = 0; out_counter = 0; outStartsAt = ((page - 1) * per_page); } // the last result to show on this page result_limit = outStartsAt + per_page; // display the results while (arrayline < matches && arrayline < result_limit) { if ((andq == 1) && (numwords > 1) && (output[arrayline][2] < numwords)) { arrayline++; continue; } out_counter++; if (out_counter <= outStartsAt) { arrayline++; continue; } ipage = output[arrayline][0]; score = output[arrayline][1]; if (OutputStyle == 0) { // basic style document.writeln("

Page: " + titles[ipage] + "
\n"); document.writeln("Score: " + score + "  URL:" + urls[ipage] + "

\n"); } else { // descriptive style document.writeln("

" + (out_counter) + ". " + titles[ipage] + "
"); if (Highlighting == 1) document.writeln(HighlightDescription(descriptions[ipage])); else document.writeln("" + descriptions[ipage] + ""); document.writeln("...
\n"); document.writeln("Terms matched: " + output[arrayline][2] + " Frequency: " + score + "  URL: " + urls[ipage] + "

\n"); } arrayline++; } // Show links to other result pages if (num_pages > 1) { document.writeln("

Result Pages: "); if (page > 1) document.writeln("<< Previous "); for (i = 1; i <= num_pages; i++) { if (i == page) { document.writeln(""+page + ""); } else { document.writeln("" + i + " "); } } if (page != num_pages) document.writeln("Next >> "); } document.writeln("

"); if (ZoomInfo == 1) document.writeln(); }