1 /* $Id: search.js,v 1.32 2007-01-16 19:42:20 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");
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')
229 function hyperlink_field(name)
231 if (name == 'md-author')
233 else if (name == 'md-subject')
239 function paint_details_tr(name, dn)
242 var dname = displayname(name);
243 var ln = create_element('b', dname);
244 var tln = document.createElement('td');
245 tln.setAttribute('width', 70);
246 tln.setAttribute('valign', 'top');
248 var tr = document.createElement('tr');
254 function paint_details(body, xml)
256 // This is some ugly display code. Replace with your own ting o'beauty
258 //body.appendChild(document.createElement('br'));
259 var nodes = xml.childNodes[0].childNodes;
261 var table = document.createElement('table');
262 table.setAttribute('cellpadding', 2);
265 for (i = 0; i < nodes.length; i++)
267 if (nodes[i].nodeType != 1)
269 var name = nodes[i].nodeName;
270 if (name == 'recid' || name == 'md-title')
272 if (name != lastname)
276 var tr = paint_details_tr(lastname, dn);
277 table.appendChild(tr);
279 dn = document.createElement('td');
283 if (!nodes[i].childNodes[0])
285 var value = nodes[i].childNodes[0].nodeValue;
286 if (dn.childNodes[0])
287 dn.appendChild(document.createTextNode('; '));
288 var hyl = hyperlink_field(name);
292 nv = create_element('a', value);
293 nv.setAttribute('href', '#');
294 nv.setAttribute('term', value);
295 nv.setAttribute('searchfield', hyl);
296 nv.onclick = function() { hyperlink_search(this); return false; };
299 nv = document.createTextNode(value);
304 var tr = paint_details_tr(lastname, dn);
305 table.appendChild(tr);
307 body.appendChild(table);
308 body.style.display = 'inline';
311 function show_details()
313 if (xfetchDetails.readyState != 4)
315 var xml = xfetchDetails.responseXML;
316 var error = xml.getElementsByTagName("error");
319 var msg = error[0].childNodes[0].nodeValue;
325 var idn = xml.getElementsByTagName('recid');
328 var id = idn[0].childNodes[0].nodeValue;
332 var body = document.getElementById('rec_' + id);
335 paint_details(body, xml);
338 function hyperlink_search(obj)
340 var field = obj.getAttribute('searchfield');
341 var term = obj.getAttribute('term');
342 var queryfield = document.getElementById('query');
343 queryfield.value = field + '=' + term;
347 function fetch_details(id)
350 var nodes = document.getElementsByName('listrecord');
352 for (i = 0; i < nodes.length; i++)
354 var dets = nodes[i].getElementsByTagName('div');
356 dets[0].style.display = 'none';
365 var url = "search.pz2?session=" + session +
368 SendXmlHttpObject(xfetchDetails = GetXmlHttpObject(), url, show_details);
371 function show_records()
373 if (xshow.readyState != 4)
376 var xml = xshow.responseXML;
377 var body = document.getElementById("body");
378 var hits = xml.getElementsByTagName("hit");
382 if (!hits[0]) // We should never get here with blocking operations
384 assign_text(body, 'No records yet');
385 searchtimer = setTimeout(check_search, 250);
389 var total = Number(xml.getElementsByTagName('total')[0].childNodes[0].nodeValue);
390 var merged = Number(xml.getElementsByTagName('merged')[0].childNodes[0].nodeValue);
391 var start = Number(xml.getElementsByTagName('start')[0].childNodes[0].nodeValue);
392 var num = Number(xml.getElementsByTagName('num')[0].childNodes[0].nodeValue);
393 var clients = Number(xml.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue);
394 var pager = make_pager(merged, start,recstoshow);
395 var break_node1 = document.createElement('br');
396 var break_node2 = document.createElement('br');
397 var record_container = document.createElement('div');
398 var interval = create_element('div', 'Records : ' + (start + 1) +
399 ' to ' + (start + num) + ' of ' +
400 merged + ' (total hits: ' +
403 interval.className = 'results';
404 record_container.className = 'records';
406 body.appendChild(pager);
407 body.appendChild(interval);
408 body.appendChild(break_node1);
409 body.appendChild(break_node2);
410 body.appendChild(record_container);
412 for (i = 0; i < hits.length; i++)
414 var tn = hits[i].getElementsByTagName("md-title");
416 var an = hits[i].getElementsByTagName("md-author");
418 var cn = hits[i].getElementsByTagName("count");
420 var idn = hits[i].getElementsByTagName("recid");
423 title = tn[0].childNodes[0].nodeValue;
427 if (an[0] && an[0].childNodes[0])
428 author = an[0].childNodes[0].nodeValue;
430 count = Number(cn[0].childNodes[0].nodeValue);
431 var id = idn[0].childNodes[0].nodeValue;
433 var record_div = document.createElement('div');
434 record_div.className = 'record';
435 record_div.setAttribute('name', 'listrecord');
437 var record_cell = create_element('a', title);
438 record_cell.setAttribute('href', '#');
439 record_cell.setAttribute('onclick', 'fetch_details(' + id + '); return false');
440 record_div.appendChild(record_cell);
443 record_div.appendChild(document.createTextNode(', by '));
444 var al = create_element('a', author);
445 al.setAttribute('href', '#');
446 al.setAttribute('term', author);
447 al.setAttribute('searchfield', 'au');
448 al.onclick = function() { hyperlink_search(this); return false; };
449 record_div.appendChild(al);
452 record_div.appendChild(document.createTextNode(
453 ' (' + count + ')'));
454 var det_div = document.createElement('div');
456 paint_details(det_div, cur_rec);
458 det_div.style.display = 'none';
459 det_div.setAttribute('id', 'rec_' + id);
460 det_div.setAttribute('name', 'details');
461 record_div.appendChild(det_div);
462 record_container.appendChild(record_div);
469 searchtimer = setTimeout(check_search, 1000);
471 searchtimer = setTimeout(check_search, 2000);
475 termtimer = setTimeout(check_termlist, 500);
478 function check_search()
480 clearTimeout(searchtimer);
481 var url = "search.pz2?" +
483 "&start=" + document.search.startrec.value +
484 "&num=" + recstoshow +
485 "&session=" + session +
486 "&sort=" + cur_sort +
488 xshow = GetXmlHttpObject();
489 xshow.onreadystatechange=show_records;
490 xshow.open("GET", url);
495 function refine_query (obj) {
496 var term = obj.getAttribute('term');
497 var cur_termlist = obj.getAttribute('facet');
498 var query_cell = document.getElementById('query');
500 term = term.replace(/[\(\)]/g, '');
502 if (cur_termlist == 'subject')
503 query_cell.value += ' and su=(' + term + ')';
504 else if (cur_termlist == 'author')
505 query_cell.value += ' and au=(' + term + ')';
512 function show_termlist()
514 if (xtermlist.readyState != 4)
518 var xml = xtermlist.responseXML;
519 var body = facet_list[cur_facet][1];
520 var facet_name = facet_list[cur_facet][0];
521 var hits = xml.getElementsByTagName("term");
523 Number(xml.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue);
527 if (cur_facet >= facet_list.length)
532 termtimer = setTimeout(check_termlist, 500);
538 for (i = 0; i < hits.length; i++)
540 var namen = hits[i].getElementsByTagName("name");
541 var freqn = hits[i].getElementsByTagName("frequency");
543 var term = namen[0].childNodes[0].nodeValue;
544 var freq = freqn[0].childNodes[0].nodeValue;
545 var refine_cell = create_element('a', term + ' (' + freq + ')');
546 refine_cell.setAttribute('href', '#');
547 refine_cell.setAttribute('term', term);
548 refine_cell.setAttribute('facet', facet_name);
549 refine_cell.onclick = function () {
553 body.appendChild(refine_cell);
557 termtimer = setTimeout(check_termlist, 1000);
561 function check_termlist()
563 var facet_name = facet_list[cur_facet][0];
564 var url = "search.pz2?" +
566 "&session=" + session +
567 "&name=" + facet_name;
568 xtermlist = GetXmlHttpObject();
569 xtermlist.onreadystatechange=show_termlist;
570 xtermlist.open("GET", url);
571 xtermlist.send(null);
576 if (xstat.readyState != 4)
579 var xml = xstat.responseXML;
580 var body = document.getElementById("stat");
581 var nodes = xml.childNodes[0].childNodes;
583 Number(xml.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue);
586 stattimer = setTimeout(check_stat, 500);
590 assign_text(body, '(');
591 for (i = 0; i < nodes.length; i++)
593 if (nodes[i].nodeType != 1)
595 var value = nodes[i].childNodes[0].nodeValue;
598 var name = nodes[i].nodeName;
599 append_text(body, ' ' + name + '=' + value);
602 append_text(body, ')');
604 stattimer = setTimeout(check_stat, 2000);
608 function check_stat()
610 var url = "search.pz2?" +
612 "&session=" + session;
613 xstat = GetXmlHttpObject();
614 xstat.onreadystatechange=show_stat;
615 xstat.open("GET", url);
619 function search_started()
621 if (xsearch.readyState != 4)
623 var xml = xsearch.responseXML;
624 var error = xml.getElementsByTagName("error");
627 var msg = error[0].childNodes[0].nodeValue;
632 stattimer = setTimeout(check_stat, 1000);
635 function start_search()
637 clearTimeout(termtimer);
639 clearTimeout(searchtimer);
641 clearTimeout(stattimer);
643 clearTimeout(showtimer);
646 var query = escape(document.getElementById('query').value);
647 var url = "search.pz2?" +
649 "&session=" + session +
651 xsearch = GetXmlHttpObject();
652 xsearch.onreadystatechange=search_started;
653 xsearch.open("GET", url);
655 clear_cell(document.getElementById("body"));
658 document.search.startrec.value = 0;
661 function session_encode ()
666 for (i = 0; i < session_cells.length; i++)
668 var name = session_cells[i];
669 var value = escape(document.getElementById(name).value);
670 session += '&' + name + '=' + value;
677 function session_restore (session)
679 var fields = session.split(/&/);
682 for (i = 1; i < fields.length; i++)
684 var pair = fields[i].split(/=/);
685 var key = pair.shift();
686 var value = pair.join('=');
687 var cell = document.getElementById(key);
695 function session_read ()
697 var ses = window.location.hash.replace(/^#/, '');
702 function session_store (new_value)
704 window.location.hash = '#' + new_value;
708 function update_history ()
710 var session = session_encode();
711 session_store(session);
712 old_session = session;
716 function session_check ()
718 var session = session_read();
719 var action = document.search.action_type.value;
721 clearInterval(url_surveillence);
723 if ( session != unescape(old_session) )
725 session_restore(session);
727 if (action == 'search') {
729 } else if (action == 'page') {
732 alert('Unregocnized action_type: ' + action);
737 url_surveillence = setInterval(session_check, 200);
741 function get_available_facets () {
742 var facet_container = document.getElementById('termlists');
743 var facet_cells = facet_container.childNodes;
744 var facets = Array();
747 for (i = 0; i < facet_cells.length; i++) {
748 var cell = facet_cells.item(i);
750 if (cell.className == 'facet') {
751 var facet_name = cell.id.replace(/^facet_([^_]+)_terms$/, "$1");
752 facets.push(Array(facet_name, cell));
760 function get_facet_container (obj) {
761 return document.getElementById(obj.id + '_terms');
765 function toggle_facet (obj) {
766 var container = get_facet_container(obj);
768 if (obj.className == 'selected') {
769 obj.className = 'unselected';
770 container.style.display = 'inline';
772 obj.className = 'selected';
773 container.style.display = 'none';