1 /* $Id: search.js,v 1.38 2007-01-17 17:24:44 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
27 var cur_sort = "relevance";
32 function initialize ()
34 facet_list = get_available_facets();
40 function GetXmlHttpObject()
43 if (window.XMLHttpRequest)
45 objXMLHttp=new XMLHttpRequest()
47 else if (window.ActiveXObject)
49 objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP")
54 function SendXmlHttpObject(obj, url, handler)
56 obj.onreadystatechange=handler;
61 function session_started()
63 if (xinitSession.readyState != 4)
65 var xml = xinitSession.responseXML;
66 var sesid = xml.getElementsByTagName("session")[0].childNodes[0].nodeValue;
67 assign_text(document.getElementById("status"), 'Live');
69 setTimeout(ping_session, 50000);
72 function start_session()
74 xinitSession = GetXmlHttpObject();
75 var url="search.pz2?";
76 url += "command=init";
77 xinitSession.onreadystatechange=session_started;
78 xinitSession.open("GET", url);
79 xinitSession.send(null);
82 function ping_session()
86 var url = "search.pz2?command=ping&session=" + session;
87 SendXmlHttpObject(xpingSession = GetXmlHttpObject(), url, session_pinged);
90 function session_pinged()
92 if (xpingSession.readyState != 4)
94 var xml = xpingSession.responseXML;
95 var error = xml.getElementsByTagName("error");
99 setTimeout(ping_session, 50000);
102 function update_action (new_action) {
103 document.search.action_type.value = new_action;
107 function make_pager (hits, offset, max) {
110 var start_offset = offset - page_window * max;
111 var div_elem = document.createElement('div');
113 div_elem.className = 'pages';
115 if (start_offset < 0) {
119 for (off = start_offset;
120 off < hits && off < (start_offset + 2 * page_window * max);
123 var p = off / max + 1;
124 var page_elem = create_element('a', p);
125 var newline_node = document.createTextNode(' ');
127 if ((offset >= off) && (offset < (off + max))) {
128 page_elem.className = 'select';
131 page_elem.setAttribute('off', off);
132 page_elem.style.cursor = 'pointer';
133 page_elem.onclick = function () {
134 update_offset(this.getAttribute('off'));
137 div_elem.appendChild(page_elem);
138 div_elem.appendChild(newline_node);
145 function update_offset (offset) {
146 clearTimeout(searchtimer);
147 document.search.startrec.value = offset;
148 update_action('page');
155 function create_element (name, cdata) {
156 var elem_node = document.createElement(name);
157 var text_node = document.createTextNode(cdata);
158 elem_node.appendChild(text_node);
164 function clear_cell (cell) {
165 while (cell.hasChildNodes())
166 cell.removeChild(cell.firstChild);
170 function append_text(cell, text) {
171 text_node = document.createTextNode(text);
172 cell.appendChild(text_node);
176 function assign_text (cell, text) {
178 append_text(cell, text);
181 function set_sort_opt(n, opt, str)
183 var txt = document.createTextNode(str);
188 var a = document.createElement('a');
190 a.setAttribute('href', "");
191 a.setAttribute('onclick', "set_sort('" + opt + "'); return false");
196 function set_sort(sort)
198 if (sort && sort != cur_sort)
205 var t = document.getElementById("sortselect");
207 t.appendChild(document.createTextNode("Sort results by: "));
208 set_sort_opt(t, 'relevance', 'Relevance');
209 t.appendChild(document.createTextNode(" or "));
210 set_sort_opt(t, 'title:1', 'Title');
213 function displayname(name)
215 if (name == 'md-author')
217 else if (name == 'md-subject')
219 else if (name == 'md-date')
221 else if (name == 'md-isbn')
223 else if (name == 'md-publisher')
225 else if (name == 'md-url')
231 function hyperlink_field(name)
233 if (name == 'md-author')
235 else if (name == 'md-subject')
237 else if (name == 'md-url')
243 function paint_details_tr(name, dn)
246 var dname = displayname(name);
247 var ln = create_element('b', dname);
248 var tln = document.createElement('td');
249 tln.setAttribute('width', 70);
250 tln.setAttribute('valign', 'top');
252 var tr = document.createElement('tr');
258 function paint_details(body, xml)
260 // This is some ugly display code. Replace with your own ting o'beauty
262 //body.appendChild(document.createElement('br'));
263 var nodes = xml.childNodes[0].childNodes;
265 var table = document.createElement('table');
266 table.setAttribute('cellpadding', 2);
269 for (i = 0; i < nodes.length; i++)
271 if (nodes[i].nodeType != 1)
273 var name = nodes[i].nodeName;
274 if (name == 'recid' || name == 'md-title')
276 if (name != lastname)
280 var tr = paint_details_tr(lastname, dn);
281 table.appendChild(tr);
283 dn = document.createElement('td');
287 if (!nodes[i].childNodes[0])
289 var value = nodes[i].childNodes[0].nodeValue;
290 if (dn.childNodes[0])
291 dn.appendChild(document.createTextNode('; '));
292 var hyl = hyperlink_field(name);
296 nv = create_element('a', value);
299 nv.setAttribute('href', value);
300 nv.setAttribute('target', '_blank');
304 nv.setAttribute('href', '#');
305 nv.setAttribute('term', value);
306 nv.setAttribute('searchfield', hyl);
307 nv.onclick = function() { hyperlink_search(this); return false; };
311 nv = document.createTextNode(value);
316 var tr = paint_details_tr(lastname, dn);
317 table.appendChild(tr);
319 body.appendChild(table);
320 body.style.display = 'inline';
323 function show_details()
325 if (xfetchDetails.readyState != 4)
327 var xml = xfetchDetails.responseXML;
328 var error = xml.getElementsByTagName("error");
331 var msg = error[0].childNodes[0].nodeValue;
337 var idn = xml.getElementsByTagName('recid');
340 var id = idn[0].childNodes[0].nodeValue;
344 var nodes = document.getElementsByName('listrecord');
346 for (i = 0; i < nodes.length; i++)
348 var dets = nodes[i].getElementsByTagName('div');
350 dets[0].style.display = 'none';
353 var body = document.getElementById('rec_' + id);
356 paint_details(body, xml);
359 function hyperlink_search(obj)
361 var field = obj.getAttribute('searchfield');
362 var term = obj.getAttribute('term');
363 var queryfield = document.getElementById('query');
364 queryfield.value = field + '=' + term;
368 function fetch_details(id)
378 var url = "search.pz2?session=" + session +
381 SendXmlHttpObject(xfetchDetails = GetXmlHttpObject(), url, show_details);
384 function show_records()
386 if (xshow.readyState != 4)
389 var xml = xshow.responseXML;
390 var body = document.getElementById("body");
391 var hits = xml.getElementsByTagName("hit");
395 if (!hits[0]) // We should never get here with blocking operations
397 assign_text(body, 'No records yet');
398 searchtimer = setTimeout(check_search, 250);
402 var total = Number(xml.getElementsByTagName('total')[0].childNodes[0].nodeValue);
403 var merged = Number(xml.getElementsByTagName('merged')[0].childNodes[0].nodeValue);
404 var start = Number(xml.getElementsByTagName('start')[0].childNodes[0].nodeValue);
405 var num = Number(xml.getElementsByTagName('num')[0].childNodes[0].nodeValue);
406 var clients = Number(xml.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue);
407 var pager = make_pager(merged, start,recstoshow);
408 var break_node1 = document.createElement('br');
409 var break_node2 = document.createElement('br');
410 var record_container = document.createElement('div');
411 var interval = create_element('div', 'Records : ' + (start + 1) +
412 ' to ' + (start + num) + ' of ' +
413 merged + ' (total hits: ' +
416 interval.className = 'results';
417 record_container.className = 'records';
419 body.appendChild(pager);
420 body.appendChild(interval);
421 body.appendChild(break_node1);
422 body.appendChild(break_node2);
423 body.appendChild(record_container);
425 for (i = 0; i < hits.length; i++)
427 var tn = hits[i].getElementsByTagName("md-title");
429 var an = hits[i].getElementsByTagName("md-author");
431 var cn = hits[i].getElementsByTagName("count");
433 var idn = hits[i].getElementsByTagName("recid");
436 title = tn[0].childNodes[0].nodeValue;
440 if (an[0] && an[0].childNodes[0])
441 author = an[0].childNodes[0].nodeValue;
443 count = Number(cn[0].childNodes[0].nodeValue);
444 var id = idn[0].childNodes[0].nodeValue;
446 var record_div = document.createElement('div');
447 record_div.className = 'record';
448 record_div.setAttribute('name', 'listrecord');
450 var record_cell = create_element('a', title);
451 record_cell.setAttribute('href', '#' + id);
452 record_cell.setAttribute('onclick', 'fetch_details(' + id + '); return false');
453 record_div.appendChild(record_cell);
456 record_div.appendChild(document.createTextNode(', by '));
457 var al = create_element('a', author);
458 al.setAttribute('href', '#');
459 al.setAttribute('term', author);
460 al.setAttribute('searchfield', 'au');
461 al.onclick = function() { hyperlink_search(this); return false; };
462 record_div.appendChild(al);
465 record_div.appendChild(document.createTextNode(
466 ' (' + count + ')'));
467 var det_div = document.createElement('div');
469 paint_details(det_div, cur_rec);
471 det_div.style.display = 'none';
472 det_div.setAttribute('id', 'rec_' + id);
473 det_div.setAttribute('name', 'details');
474 record_div.appendChild(det_div);
475 record_container.appendChild(record_div);
482 searchtimer = setTimeout(check_search, 1000);
484 searchtimer = setTimeout(check_search, 2000);
488 termtimer = setTimeout(check_termlist, 500);
491 function check_search()
493 clearTimeout(searchtimer);
494 var url = "search.pz2?" +
496 "&start=" + document.search.startrec.value +
497 "&num=" + recstoshow +
498 "&session=" + session +
499 "&sort=" + cur_sort +
501 xshow = GetXmlHttpObject();
502 xshow.onreadystatechange=show_records;
503 xshow.open("GET", url);
508 function refine_query (obj) {
509 var term = obj.getAttribute('term');
510 var cur_termlist = obj.getAttribute('facet');
511 var query_cell = document.getElementById('query');
513 term = term.replace(/[\(\)]/g, '');
515 if (cur_termlist == 'subject')
516 query_cell.value += ' and su=(' + term + ')';
517 else if (cur_termlist == 'author')
518 query_cell.value += ' and au=(' + term + ')';
519 else if (cur_termlist == 'date')
520 query_cell.value += ' and date=' + term;
525 function clear_termlists()
528 for (i = 0; i < facet_list.length; i++)
529 clear_cell(facet_list[i][1]);
532 function show_termlists()
534 if (xtermlist.readyState != 4)
538 var xml = xtermlist.responseXML;
540 Number(xml.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue);
541 var lists = xml.getElementsByTagName("list");
543 for (i = 0; i < lists.length; i++)
545 var listname = lists[i].getAttribute('name');
546 var body = document.getElementById('facet_' + listname + '_terms');
547 if (body.style.display == 'none')
550 var terms = lists[i].getElementsByTagName('term');
552 for (t = 0; t < terms.length; t++)
554 var namen = terms[t].getElementsByTagName("name");
555 var freqn = terms[t].getElementsByTagName("frequency");
557 var term = namen[0].childNodes[0].nodeValue;
558 var freq = freqn[0].childNodes[0].nodeValue;
559 var refine_cell = create_element('a', term + ' (' + freq + ')');
560 refine_cell.setAttribute('href', '#');
561 refine_cell.setAttribute('term', term);
562 refine_cell.setAttribute('facet', listname);
563 refine_cell.onclick = function () {
567 body.appendChild(refine_cell);
571 termtimer = setTimeout(check_termlist, 1000);
574 function check_termlist()
576 var facet_names = '';
578 for (i = 0; i < facet_list.length; i++)
579 if (facet_list[i][1].style.display != 'none')
583 facet_names += facet_list[i][0];
585 var url = "search.pz2?" +
587 "&session=" + session +
588 "&name=" + facet_names +
590 SendXmlHttpObject(xtermlist = GetXmlHttpObject(), url, show_termlists);
595 if (xstat.readyState != 4)
598 var xml = xstat.responseXML;
599 var body = document.getElementById("stat");
600 var nodes = xml.childNodes[0].childNodes;
602 Number(xml.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue);
605 stattimer = setTimeout(check_stat, 500);
609 assign_text(body, '(');
610 for (i = 0; i < nodes.length; i++)
612 if (nodes[i].nodeType != 1)
614 var value = nodes[i].childNodes[0].nodeValue;
617 var name = nodes[i].nodeName;
618 append_text(body, ' ' + name + '=' + value);
621 append_text(body, ')');
623 stattimer = setTimeout(check_stat, 2000);
627 function check_stat()
629 var url = "search.pz2?" +
631 "&session=" + session;
632 xstat = GetXmlHttpObject();
633 xstat.onreadystatechange=show_stat;
634 xstat.open("GET", url);
638 function search_started()
640 if (xsearch.readyState != 4)
642 var xml = xsearch.responseXML;
643 var error = xml.getElementsByTagName("error");
646 var msg = error[0].childNodes[0].nodeValue;
651 stattimer = setTimeout(check_stat, 1000);
654 function start_search()
656 clearTimeout(termtimer);
658 clearTimeout(searchtimer);
660 clearTimeout(stattimer);
662 clearTimeout(showtimer);
666 var query = escape(document.getElementById('query').value);
667 var url = "search.pz2?" +
669 "&session=" + session +
671 xsearch = GetXmlHttpObject();
672 xsearch.onreadystatechange=search_started;
673 xsearch.open("GET", url);
675 clear_cell(document.getElementById("body"));
678 document.search.startrec.value = 0;
681 function session_encode ()
686 for (i = 0; i < session_cells.length; i++)
688 var name = session_cells[i];
689 var value = escape(document.getElementById(name).value);
690 session += '&' + name + '=' + value;
697 function session_restore (session)
699 var fields = session.split(/&/);
702 for (i = 1; i < fields.length; i++)
704 var pair = fields[i].split(/=/);
705 var key = pair.shift();
706 var value = pair.join('=');
707 var cell = document.getElementById(key);
715 function session_read ()
717 var ses = window.location.hash.replace(/^#/, '');
722 function session_store (new_value)
724 window.location.hash = '#' + new_value;
728 function update_history ()
730 var session = session_encode();
731 session_store(session);
732 old_session = session;
736 function session_check ()
738 var session = session_read();
739 var action = document.search.action_type.value;
741 clearInterval(url_surveillence);
743 if ( session != unescape(old_session) )
745 session_restore(session);
747 if (action == 'search') {
749 } else if (action == 'page') {
752 alert('Unregocnized action_type: ' + action);
757 url_surveillence = setInterval(session_check, 200);
761 function get_available_facets () {
762 var facet_container = document.getElementById('termlists');
763 var facet_cells = facet_container.childNodes;
764 var facets = Array();
767 for (i = 0; i < facet_cells.length; i++) {
768 var cell = facet_cells.item(i);
770 if (cell.className == 'facet') {
771 var facet_name = cell.id.replace(/^facet_([^_]+)_terms$/, "$1");
772 facets.push(Array(facet_name, cell));
780 function get_facet_container (obj) {
781 return document.getElementById(obj.id + '_terms');
785 function toggle_facet (obj) {
786 var container = get_facet_container(obj);
788 if (obj.className == 'selected') {
789 obj.className = 'unselected';
790 container.style.display = 'inline';
793 obj.className = 'selected';
794 container.style.display = 'none';