1 /* $Id: search.js,v 1.37 2007-01-17 15:31:46 quinn Exp $
2 * ---------------------------------------------------
15 var targetsloaded = false;
21 var session_cells = Array('query', 'startrec', 'action_type');
22 var old_session = session_read();
25 var page_window = 5; // Number of pages prior to and after the current page
28 var cur_sort = "relevance";
33 function initialize ()
35 facet_list = get_available_facets();
41 function GetXmlHttpObject()
44 if (window.XMLHttpRequest)
46 objXMLHttp=new XMLHttpRequest()
48 else if (window.ActiveXObject)
50 objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP")
55 function SendXmlHttpObject(obj, url, handler)
57 obj.onreadystatechange=handler;
62 function session_started()
64 if (xinitSession.readyState != 4)
66 var xml = xinitSession.responseXML;
67 var sesid = xml.getElementsByTagName("session")[0].childNodes[0].nodeValue;
68 assign_text(document.getElementById("status"), 'Live');
70 setTimeout(ping_session, 50000);
73 function start_session()
75 xinitSession = GetXmlHttpObject();
76 var url="search.pz2?";
77 url += "command=init";
78 xinitSession.onreadystatechange=session_started;
79 xinitSession.open("GET", url);
80 xinitSession.send(null);
83 function ping_session()
87 var url = "search.pz2?command=ping&session=" + session;
88 SendXmlHttpObject(xpingSession = GetXmlHttpObject(), url, session_pinged);
91 function session_pinged()
93 if (xpingSession.readyState != 4)
95 var xml = xpingSession.responseXML;
96 var error = xml.getElementsByTagName("error");
100 setTimeout(ping_session, 50000);
103 function update_action (new_action) {
104 document.search.action_type.value = new_action;
108 function make_pager (hits, offset, max) {
111 var start_offset = offset - page_window * max;
112 var div_elem = document.createElement('div');
114 div_elem.className = 'pages';
116 if (start_offset < 0) {
120 for (off = start_offset;
121 off < hits && off < (start_offset + 2 * page_window * max);
124 var p = off / max + 1;
125 var page_elem = create_element('a', p);
126 var newline_node = document.createTextNode(' ');
128 if ((offset >= off) && (offset < (off + max))) {
129 page_elem.className = 'select';
132 page_elem.setAttribute('off', off);
133 page_elem.style.cursor = 'pointer';
134 page_elem.onclick = function () {
135 update_offset(this.getAttribute('off'));
138 div_elem.appendChild(page_elem);
139 div_elem.appendChild(newline_node);
146 function update_offset (offset) {
147 clearTimeout(searchtimer);
148 document.search.startrec.value = offset;
149 update_action('page');
156 function create_element (name, cdata) {
157 var elem_node = document.createElement(name);
158 var text_node = document.createTextNode(cdata);
159 elem_node.appendChild(text_node);
165 function clear_cell (cell) {
166 while (cell.hasChildNodes())
167 cell.removeChild(cell.firstChild);
171 function append_text(cell, text) {
172 text_node = document.createTextNode(text);
173 cell.appendChild(text_node);
177 function assign_text (cell, text) {
179 append_text(cell, text);
182 function set_sort_opt(n, opt, str)
184 var txt = document.createTextNode(str);
189 var a = document.createElement('a');
191 a.setAttribute('href', "");
192 a.setAttribute('onclick', "set_sort('" + opt + "'); return false");
197 function set_sort(sort)
199 if (sort && sort != cur_sort)
206 var t = document.getElementById("sortselect");
208 t.appendChild(document.createTextNode("Sort results by: "));
209 set_sort_opt(t, 'relevance', 'Relevance');
210 t.appendChild(document.createTextNode(" or "));
211 set_sort_opt(t, 'title:1', 'Title');
214 function displayname(name)
216 if (name == 'md-author')
218 else if (name == 'md-subject')
220 else if (name == 'md-date')
222 else if (name == 'md-isbn')
224 else if (name == 'md-publisher')
226 else if (name == 'md-url')
232 function hyperlink_field(name)
234 if (name == 'md-author')
236 else if (name == 'md-subject')
238 else if (name == 'md-url')
244 function paint_details_tr(name, dn)
247 var dname = displayname(name);
248 var ln = create_element('b', dname);
249 var tln = document.createElement('td');
250 tln.setAttribute('width', 70);
251 tln.setAttribute('valign', 'top');
253 var tr = document.createElement('tr');
259 function paint_details(body, xml)
261 // This is some ugly display code. Replace with your own ting o'beauty
263 //body.appendChild(document.createElement('br'));
264 var nodes = xml.childNodes[0].childNodes;
266 var table = document.createElement('table');
267 table.setAttribute('cellpadding', 2);
270 for (i = 0; i < nodes.length; i++)
272 if (nodes[i].nodeType != 1)
274 var name = nodes[i].nodeName;
275 if (name == 'recid' || name == 'md-title')
277 if (name != lastname)
281 var tr = paint_details_tr(lastname, dn);
282 table.appendChild(tr);
284 dn = document.createElement('td');
288 if (!nodes[i].childNodes[0])
290 var value = nodes[i].childNodes[0].nodeValue;
291 if (dn.childNodes[0])
292 dn.appendChild(document.createTextNode('; '));
293 var hyl = hyperlink_field(name);
297 nv = create_element('a', value);
300 nv.setAttribute('href', value);
301 nv.setAttribute('target', '_blank');
305 nv.setAttribute('href', '#');
306 nv.setAttribute('term', value);
307 nv.setAttribute('searchfield', hyl);
308 nv.onclick = function() { hyperlink_search(this); return false; };
312 nv = document.createTextNode(value);
317 var tr = paint_details_tr(lastname, dn);
318 table.appendChild(tr);
320 body.appendChild(table);
321 body.style.display = 'inline';
324 function show_details()
326 if (xfetchDetails.readyState != 4)
328 var xml = xfetchDetails.responseXML;
329 var error = xml.getElementsByTagName("error");
332 var msg = error[0].childNodes[0].nodeValue;
338 var idn = xml.getElementsByTagName('recid');
341 var id = idn[0].childNodes[0].nodeValue;
345 var nodes = document.getElementsByName('listrecord');
347 for (i = 0; i < nodes.length; i++)
349 var dets = nodes[i].getElementsByTagName('div');
351 dets[0].style.display = 'none';
354 var body = document.getElementById('rec_' + id);
357 paint_details(body, xml);
360 function hyperlink_search(obj)
362 var field = obj.getAttribute('searchfield');
363 var term = obj.getAttribute('term');
364 var queryfield = document.getElementById('query');
365 queryfield.value = field + '=' + term;
369 function fetch_details(id)
379 var url = "search.pz2?session=" + session +
382 SendXmlHttpObject(xfetchDetails = GetXmlHttpObject(), url, show_details);
385 function show_records()
387 if (xshow.readyState != 4)
390 var xml = xshow.responseXML;
391 var body = document.getElementById("body");
392 var hits = xml.getElementsByTagName("hit");
396 if (!hits[0]) // We should never get here with blocking operations
398 assign_text(body, 'No records yet');
399 searchtimer = setTimeout(check_search, 250);
403 var total = Number(xml.getElementsByTagName('total')[0].childNodes[0].nodeValue);
404 var merged = Number(xml.getElementsByTagName('merged')[0].childNodes[0].nodeValue);
405 var start = Number(xml.getElementsByTagName('start')[0].childNodes[0].nodeValue);
406 var num = Number(xml.getElementsByTagName('num')[0].childNodes[0].nodeValue);
407 var clients = Number(xml.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue);
408 var pager = make_pager(merged, start,recstoshow);
409 var break_node1 = document.createElement('br');
410 var break_node2 = document.createElement('br');
411 var record_container = document.createElement('div');
412 var interval = create_element('div', 'Records : ' + (start + 1) +
413 ' to ' + (start + num) + ' of ' +
414 merged + ' (total hits: ' +
417 interval.className = 'results';
418 record_container.className = 'records';
420 body.appendChild(pager);
421 body.appendChild(interval);
422 body.appendChild(break_node1);
423 body.appendChild(break_node2);
424 body.appendChild(record_container);
426 for (i = 0; i < hits.length; i++)
428 var tn = hits[i].getElementsByTagName("md-title");
430 var an = hits[i].getElementsByTagName("md-author");
432 var cn = hits[i].getElementsByTagName("count");
434 var idn = hits[i].getElementsByTagName("recid");
437 title = tn[0].childNodes[0].nodeValue;
441 if (an[0] && an[0].childNodes[0])
442 author = an[0].childNodes[0].nodeValue;
444 count = Number(cn[0].childNodes[0].nodeValue);
445 var id = idn[0].childNodes[0].nodeValue;
447 var record_div = document.createElement('div');
448 record_div.className = 'record';
449 record_div.setAttribute('name', 'listrecord');
451 var record_cell = create_element('a', title);
452 record_cell.setAttribute('href', '#' + id);
453 record_cell.setAttribute('onclick', 'fetch_details(' + id + '); return false');
454 record_div.appendChild(record_cell);
457 record_div.appendChild(document.createTextNode(', by '));
458 var al = create_element('a', author);
459 al.setAttribute('href', '#');
460 al.setAttribute('term', author);
461 al.setAttribute('searchfield', 'au');
462 al.onclick = function() { hyperlink_search(this); return false; };
463 record_div.appendChild(al);
466 record_div.appendChild(document.createTextNode(
467 ' (' + count + ')'));
468 var det_div = document.createElement('div');
470 paint_details(det_div, cur_rec);
472 det_div.style.display = 'none';
473 det_div.setAttribute('id', 'rec_' + id);
474 det_div.setAttribute('name', 'details');
475 record_div.appendChild(det_div);
476 record_container.appendChild(record_div);
483 searchtimer = setTimeout(check_search, 1000);
485 searchtimer = setTimeout(check_search, 2000);
489 termtimer = setTimeout(check_termlist, 500);
492 function check_search()
494 clearTimeout(searchtimer);
495 var url = "search.pz2?" +
497 "&start=" + document.search.startrec.value +
498 "&num=" + recstoshow +
499 "&session=" + session +
500 "&sort=" + cur_sort +
502 xshow = GetXmlHttpObject();
503 xshow.onreadystatechange=show_records;
504 xshow.open("GET", url);
509 function refine_query (obj) {
510 var term = obj.getAttribute('term');
511 var cur_termlist = obj.getAttribute('facet');
512 var query_cell = document.getElementById('query');
514 term = term.replace(/[\(\)]/g, '');
516 if (cur_termlist == 'subject')
517 query_cell.value += ' and su=(' + term + ')';
518 else if (cur_termlist == 'author')
519 query_cell.value += ' and au=(' + term + ')';
520 else if (cur_termlist == 'date')
521 query_cell.value += ' and date=' + term;
528 function show_termlist()
530 if (xtermlist.readyState != 4)
534 var xml = xtermlist.responseXML;
535 var body = facet_list[cur_facet][1];
536 var facet_name = facet_list[cur_facet][0];
537 var hits = xml.getElementsByTagName("term");
539 Number(xml.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue);
543 if (cur_facet >= facet_list.length)
548 termtimer = setTimeout(check_termlist, 500);
554 for (i = 0; i < hits.length; i++)
556 var namen = hits[i].getElementsByTagName("name");
557 var freqn = hits[i].getElementsByTagName("frequency");
559 var term = namen[0].childNodes[0].nodeValue;
560 var freq = freqn[0].childNodes[0].nodeValue;
561 var refine_cell = create_element('a', term + ' (' + freq + ')');
562 refine_cell.setAttribute('href', '#');
563 refine_cell.setAttribute('term', term);
564 refine_cell.setAttribute('facet', facet_name);
565 refine_cell.onclick = function () {
569 body.appendChild(refine_cell);
573 termtimer = setTimeout(check_termlist, 1000);
577 function check_termlist()
579 var facet_name = facet_list[cur_facet][0];
580 var url = "search.pz2?" +
582 "&session=" + session +
583 "&name=" + facet_name +
585 xtermlist = GetXmlHttpObject();
586 xtermlist.onreadystatechange=show_termlist;
587 xtermlist.open("GET", url);
588 xtermlist.send(null);
593 if (xstat.readyState != 4)
596 var xml = xstat.responseXML;
597 var body = document.getElementById("stat");
598 var nodes = xml.childNodes[0].childNodes;
600 Number(xml.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue);
603 stattimer = setTimeout(check_stat, 500);
607 assign_text(body, '(');
608 for (i = 0; i < nodes.length; i++)
610 if (nodes[i].nodeType != 1)
612 var value = nodes[i].childNodes[0].nodeValue;
615 var name = nodes[i].nodeName;
616 append_text(body, ' ' + name + '=' + value);
619 append_text(body, ')');
621 stattimer = setTimeout(check_stat, 2000);
625 function check_stat()
627 var url = "search.pz2?" +
629 "&session=" + session;
630 xstat = GetXmlHttpObject();
631 xstat.onreadystatechange=show_stat;
632 xstat.open("GET", url);
636 function search_started()
638 if (xsearch.readyState != 4)
640 var xml = xsearch.responseXML;
641 var error = xml.getElementsByTagName("error");
644 var msg = error[0].childNodes[0].nodeValue;
649 stattimer = setTimeout(check_stat, 1000);
652 function start_search()
654 clearTimeout(termtimer);
656 clearTimeout(searchtimer);
658 clearTimeout(stattimer);
660 clearTimeout(showtimer);
663 var query = escape(document.getElementById('query').value);
664 var url = "search.pz2?" +
666 "&session=" + session +
668 xsearch = GetXmlHttpObject();
669 xsearch.onreadystatechange=search_started;
670 xsearch.open("GET", url);
672 clear_cell(document.getElementById("body"));
675 document.search.startrec.value = 0;
678 function session_encode ()
683 for (i = 0; i < session_cells.length; i++)
685 var name = session_cells[i];
686 var value = escape(document.getElementById(name).value);
687 session += '&' + name + '=' + value;
694 function session_restore (session)
696 var fields = session.split(/&/);
699 for (i = 1; i < fields.length; i++)
701 var pair = fields[i].split(/=/);
702 var key = pair.shift();
703 var value = pair.join('=');
704 var cell = document.getElementById(key);
712 function session_read ()
714 var ses = window.location.hash.replace(/^#/, '');
719 function session_store (new_value)
721 window.location.hash = '#' + new_value;
725 function update_history ()
727 var session = session_encode();
728 session_store(session);
729 old_session = session;
733 function session_check ()
735 var session = session_read();
736 var action = document.search.action_type.value;
738 clearInterval(url_surveillence);
740 if ( session != unescape(old_session) )
742 session_restore(session);
744 if (action == 'search') {
746 } else if (action == 'page') {
749 alert('Unregocnized action_type: ' + action);
754 url_surveillence = setInterval(session_check, 200);
758 function get_available_facets () {
759 var facet_container = document.getElementById('termlists');
760 var facet_cells = facet_container.childNodes;
761 var facets = Array();
764 for (i = 0; i < facet_cells.length; i++) {
765 var cell = facet_cells.item(i);
767 if (cell.className == 'facet') {
768 var facet_name = cell.id.replace(/^facet_([^_]+)_terms$/, "$1");
769 facets.push(Array(facet_name, cell));
777 function get_facet_container (obj) {
778 return document.getElementById(obj.id + '_terms');
782 function toggle_facet (obj) {
783 var container = get_facet_container(obj);
785 if (obj.className == 'selected') {
786 obj.className = 'unselected';
787 container.style.display = 'inline';
789 obj.className = 'selected';
790 container.style.display = 'none';