1 /* $Id: search.js,v 1.44 2007-01-20 20:11:36 sondberg 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();
39 function GetXmlHttpObject()
42 if (window.XMLHttpRequest)
44 objXMLHttp=new XMLHttpRequest()
46 else if (window.ActiveXObject)
48 objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP")
53 function SendXmlHttpObject(obj, url, handler)
55 obj.onreadystatechange=handler;
60 function session_started()
62 if (xinitSession.readyState != 4)
64 var xml = xinitSession.responseXML;
65 var sesid = xml.getElementsByTagName("session")[0].childNodes[0].nodeValue;
66 assign_text(document.getElementById("status"), 'Live');
68 setTimeout(ping_session, 50000);
71 function start_session()
73 xinitSession = GetXmlHttpObject();
74 var url="search.pz2?";
75 url += "command=init";
76 xinitSession.onreadystatechange=session_started;
77 xinitSession.open("GET", url);
78 xinitSession.send(null);
81 function ping_session()
85 var url = "search.pz2?command=ping&session=" + session;
86 SendXmlHttpObject(xpingSession = GetXmlHttpObject(), url, session_pinged);
89 function session_pinged()
91 if (xpingSession.readyState != 4)
93 var xml = xpingSession.responseXML;
94 var error = xml.getElementsByTagName("error");
98 setTimeout(ping_session, 50000);
101 function update_action (new_action) {
102 document.search.action_type.value = new_action;
106 function make_pager (hits, offset, max) {
109 var start_offset = offset - page_window * max;
110 var div_elem = document.createElement('div');
112 div_elem.className = 'pages';
114 if (start_offset < 0) {
118 for (off = start_offset;
119 off < hits && off < (start_offset + 2 * page_window * max);
122 var p = off / max + 1;
123 var page_elem = create_element('a', p);
124 var newline_node = document.createTextNode(' ');
126 if ((offset >= off) && (offset < (off + max))) {
127 page_elem.className = 'select';
130 page_elem.setAttribute('off', off);
131 page_elem.style.cursor = 'pointer';
132 page_elem.onclick = function () {
133 update_offset(this.getAttribute('off'));
136 div_elem.appendChild(page_elem);
137 div_elem.appendChild(newline_node);
144 function update_offset (offset) {
145 clearTimeout(searchtimer);
146 document.search.startrec.value = offset;
147 update_action('page');
154 function create_element (name, cdata) {
155 var elem_node = document.createElement(name);
156 var text_node = document.createTextNode(cdata);
157 elem_node.appendChild(text_node);
163 function clear_cell (cell) {
164 while (cell.hasChildNodes())
165 cell.removeChild(cell.firstChild);
169 function append_text(cell, text) {
170 text_node = document.createTextNode(text);
171 cell.appendChild(text_node);
175 function assign_text (cell, text) {
177 append_text(cell, text);
180 function set_sort_opt(n, opt, str)
182 var txt = document.createTextNode(str);
187 var a = document.createElement('a');
189 a.setAttribute('href', "");
190 a.setAttribute('onclick', "set_sort('" + opt + "'); return false");
195 function set_sort(sort)
197 if (sort && sort != cur_sort)
204 var t = document.getElementById("sortselect");
206 t.appendChild(document.createTextNode("Sort results by: "));
207 set_sort_opt(t, 'relevance', 'Relevance');
208 t.appendChild(document.createTextNode(" or "));
209 set_sort_opt(t, 'title:1', 'Title');
212 function displayname(name)
214 if (name == 'md-author')
216 else if (name == 'md-subject')
218 else if (name == 'md-date')
220 else if (name == 'md-isbn')
222 else if (name == 'md-publisher')
224 else if (name == 'md-url')
226 else if (name == 'md-title')
228 else if (name == 'md-id')
230 else if (name == 'md-lccn')
232 else if (name == 'recid')
234 else if (name == 'location')
240 function hyperlink_field(name)
242 if (name == 'md-author')
244 else if (name == 'md-subject')
246 else if (name == 'md-url')
252 function paint_details_tr(name, dn)
255 var dname = displayname(name);
256 var ln = create_element('b', dname);
257 var tln = document.createElement('td');
258 tln.setAttribute('width', 90);
259 tln.setAttribute('valign', 'top');
261 var tr = document.createElement('tr');
267 function paint_data_elements(target, node)
269 var nodes = node.childNodes;
273 for (i = 0; i < nodes.length; i++)
275 if (nodes[i].nodeType != 1)
277 var name = nodes[i].nodeName;
278 if (name == 'recid' || name == 'md-title')
280 if (name != lastname && lastname != 'location')
284 var tr = paint_details_tr(lastname, dn);
285 target.appendChild(tr);
287 dn = document.createElement('td');
290 if (name == 'location')
292 target.appendChild(paint_details_tr('Location', paint_subrecord(nodes[i])));
295 if (!nodes[i].childNodes[0])
297 var value = nodes[i].childNodes[0].nodeValue;
298 if (dn.childNodes[0])
299 dn.appendChild(document.createTextNode('; '));
300 var hyl = hyperlink_field(name);
304 nv = create_element('a', value);
307 nv.setAttribute('href', value);
308 nv.setAttribute('target', '_blank');
312 nv.setAttribute('href', '#');
313 nv.setAttribute('term', value);
314 nv.setAttribute('searchfield', hyl);
315 nv.onclick = function() { hyperlink_search(this); return false; };
318 else if (name == 'md-lccn')
320 nv = document.createElement('span');
321 nv.appendChild(document.createTextNode(value + ' '));
322 var link = create_element('a', 'Show title in LoC');
323 link.setAttribute('target', '_blank');
324 link.setAttribute('href', 'http://catalog.loc.gov/cgi-bin/Pwebrecon.cgi?DB=local&CNT=10&CMD=10+records+per+page&CMD=lccn+' + value);
325 nv.appendChild(link);
329 nv = document.createTextNode(value);
332 if (dn && lastname != 'location')
334 var tr = paint_details_tr(lastname, dn);
335 target.appendChild(tr);
339 function paint_subrecord(node)
341 var table = document.createElement('table');
342 var zurl = node.getAttribute('id');
343 var name = node.getAttribute('name');
346 tr = paint_details_tr('Source', document.createTextNode(name));
348 tr = paint_details_tr('Source', document.createTextNode(zurl));
349 table.appendChild(tr);
350 paint_data_elements(table, node);
354 function paint_details(body, xml)
357 var table = document.createElement('table');
358 table.setAttribute('cellpadding', 2);
359 paint_data_elements(table, xml.childNodes[0]);
360 body.appendChild(table);
361 body.style.display = 'inline';
364 function show_details()
366 if (xfetchDetails.readyState != 4)
368 var xml = xfetchDetails.responseXML;
369 var error = xml.getElementsByTagName("error");
372 var msg = error[0].childNodes[0].nodeValue;
378 var idn = xml.getElementsByTagName('recid');
381 var id = idn[0].childNodes[0].nodeValue;
385 var nodes = document.getElementsByName('listrecord');
387 for (i = 0; i < nodes.length; i++)
389 var dets = nodes[i].getElementsByTagName('div');
391 dets[0].style.display = 'none';
394 var body = document.getElementById('rec_' + id);
397 paint_details(body, xml);
400 function hyperlink_search(obj)
402 var field = obj.getAttribute('searchfield');
403 var term = obj.getAttribute('term');
404 var queryfield = document.getElementById('query');
405 queryfield.value = field + '=' + term;
409 function fetch_details(id)
419 var url = "search.pz2?session=" + session +
422 SendXmlHttpObject(xfetchDetails = GetXmlHttpObject(), url, show_details);
425 function show_records()
427 if (xshow.readyState != 4)
430 var xml = xshow.responseXML;
431 var body = document.getElementById("body");
432 var hits = xml.getElementsByTagName("hit");
436 if (!hits[0]) // We should never get here with blocking operations
438 assign_text(body, 'No records yet');
439 searchtimer = setTimeout(check_search, 250);
443 var total = Number(xml.getElementsByTagName('total')[0].childNodes[0].nodeValue);
444 var merged = Number(xml.getElementsByTagName('merged')[0].childNodes[0].nodeValue);
445 var start = Number(xml.getElementsByTagName('start')[0].childNodes[0].nodeValue);
446 var num = Number(xml.getElementsByTagName('num')[0].childNodes[0].nodeValue);
447 var clients = Number(xml.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue);
448 var pager = make_pager(merged, start,recstoshow);
449 var break_node1 = document.createElement('br');
450 var break_node2 = document.createElement('br');
451 var record_container = document.createElement('div');
452 var interval = create_element('div', 'Records : ' + (start + 1) +
453 ' to ' + (start + num) + ' of ' +
454 merged + ' (total hits: ' +
457 interval.className = 'results';
458 record_container.className = 'records';
460 body.appendChild(pager);
461 body.appendChild(interval);
462 body.appendChild(break_node1);
463 body.appendChild(break_node2);
464 body.appendChild(record_container);
466 for (i = 0; i < hits.length; i++)
468 var tn = hits[i].getElementsByTagName("md-title");
470 var an = hits[i].getElementsByTagName("md-author");
472 var cn = hits[i].getElementsByTagName("count");
474 var idn = hits[i].getElementsByTagName("recid");
477 title = tn[0].childNodes[0].nodeValue;
481 if (an[0] && an[0].childNodes[0])
482 author = an[0].childNodes[0].nodeValue;
484 count = Number(cn[0].childNodes[0].nodeValue);
485 var id = idn[0].childNodes[0].nodeValue;
487 var record_div = document.createElement('div');
488 record_div.className = 'record';
489 record_div.setAttribute('name', 'listrecord');
491 var record_cell = create_element('a', title);
492 record_cell.setAttribute('href', '#' + id);
493 record_cell.setAttribute('onclick', 'fetch_details(' + id + '); return false');
494 record_div.appendChild(record_cell);
497 record_div.appendChild(document.createTextNode(', by '));
498 var al = create_element('a', author);
499 al.setAttribute('href', '#');
500 al.setAttribute('term', author);
501 al.setAttribute('searchfield', 'au');
502 al.onclick = function() { hyperlink_search(this); return false; };
503 record_div.appendChild(al);
506 record_div.appendChild(document.createTextNode(
507 ' (' + count + ')'));
508 var det_div = document.createElement('div');
510 paint_details(det_div, cur_rec);
512 det_div.style.display = 'none';
513 det_div.setAttribute('id', 'rec_' + id);
514 det_div.setAttribute('name', 'details');
515 record_div.appendChild(det_div);
516 record_container.appendChild(record_div);
523 searchtimer = setTimeout(check_search, 1000);
525 searchtimer = setTimeout(check_search, 2000);
529 termtimer = setTimeout(check_termlist, 500);
532 function check_search()
534 clearTimeout(searchtimer);
535 var url = "search.pz2?" +
537 "&start=" + document.search.startrec.value +
538 "&num=" + recstoshow +
539 "&session=" + session +
540 "&sort=" + cur_sort +
542 xshow = GetXmlHttpObject();
543 xshow.onreadystatechange=show_records;
544 xshow.open("GET", url);
549 function refine_query (obj) {
550 var term = obj.getAttribute('term');
551 var cur_termlist = obj.getAttribute('facet');
552 var query_cell = document.getElementById('query');
554 term = term.replace(/[\(\)]/g, '');
556 if (cur_termlist == 'subject')
557 query_cell.value += ' and su=' + term;
558 else if (cur_termlist == 'author')
559 query_cell.value += ' and au=' + term;
560 else if (cur_termlist == 'date')
561 query_cell.value += ' and date=' + term;
566 function clear_termlists()
569 for (i = 0; i < facet_list.length; i++)
570 clear_cell(facet_list[i][1]);
573 function show_termlists()
575 if (xtermlist.readyState != 4)
579 var xml = xtermlist.responseXML;
581 Number(xml.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue);
582 var lists = xml.getElementsByTagName("list");
584 for (i = 0; i < lists.length; i++)
586 var listname = lists[i].getAttribute('name');
587 var body = document.getElementById('facet_' + listname + '_terms');
588 if (body.style.display == 'none')
591 var terms = lists[i].getElementsByTagName('term');
593 for (t = 0; t < terms.length; t++)
595 var namen = terms[t].getElementsByTagName("name");
596 var freqn = terms[t].getElementsByTagName("frequency");
598 var term = namen[0].childNodes[0].nodeValue;
599 var freq = freqn[0].childNodes[0].nodeValue;
600 var refine_cell = create_element('a', term + ' (' + freq + ')');
601 refine_cell.setAttribute('href', '#');
602 refine_cell.setAttribute('term', term);
603 refine_cell.setAttribute('facet', listname);
604 refine_cell.onclick = function () {
608 body.appendChild(refine_cell);
612 termtimer = setTimeout(check_termlist, 1000);
615 function check_termlist()
617 var facet_names = '';
619 for (i = 0; i < facet_list.length; i++)
620 if (facet_list[i][1].style.display != 'none')
624 facet_names += facet_list[i][0];
626 var url = "search.pz2?" +
628 "&session=" + session +
629 "&name=" + facet_names +
631 SendXmlHttpObject(xtermlist = GetXmlHttpObject(), url, show_termlists);
636 if (xstat.readyState != 4)
639 var xml = xstat.responseXML;
640 var body = document.getElementById("stat");
641 var nodes = xml.childNodes[0].childNodes;
643 Number(xml.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue);
646 stattimer = setTimeout(check_stat, 500);
650 assign_text(body, '(');
651 for (i = 0; i < nodes.length; i++)
653 if (nodes[i].nodeType != 1)
655 var value = nodes[i].childNodes[0].nodeValue;
658 var name = nodes[i].nodeName;
659 append_text(body, ' ' + name + '=' + value);
662 append_text(body, ')');
664 stattimer = setTimeout(check_stat, 2000);
668 function check_stat()
670 var url = "search.pz2?" +
672 "&session=" + session;
673 xstat = GetXmlHttpObject();
674 xstat.onreadystatechange=show_stat;
675 xstat.open("GET", url);
679 function search_started()
681 if (xsearch.readyState != 4)
683 var xml = xsearch.responseXML;
684 var error = xml.getElementsByTagName("error");
687 var msg = error[0].childNodes[0].nodeValue;
692 stattimer = setTimeout(check_stat, 1000);
695 function start_search()
697 clearTimeout(termtimer);
699 clearTimeout(searchtimer);
701 clearTimeout(stattimer);
703 clearTimeout(showtimer);
707 var query = escape(document.getElementById('query').value);
708 var url = "search.pz2?" +
710 "&session=" + session +
712 xsearch = GetXmlHttpObject();
713 xsearch.onreadystatechange=search_started;
714 xsearch.open("GET", url);
716 clear_cell(document.getElementById("body"));
719 document.search.startrec.value = 0;
722 function session_encode ()
727 for (i = 0; i < session_cells.length; i++)
729 var name = session_cells[i];
730 var value = escape(document.getElementById(name).value);
731 session += '&' + name + '=' + value;
738 function session_restore (session)
740 var fields = session.split(/&/);
743 for (i = 1; i < fields.length; i++)
745 var pair = fields[i].split(/=/);
746 var key = pair.shift();
747 var value = pair.join('=');
748 var cell = document.getElementById(key);
756 function session_read ()
758 var ses = window.location.hash.replace(/^#/, '');
763 function session_store (new_value)
765 window.location.hash = '#' + new_value;
769 function update_history ()
771 var session = session_encode();
772 session_store(session);
773 old_session = session;
777 function session_check ()
779 var session = session_read();
780 var action = document.search.action_type.value;
782 clearInterval(url_surveillence);
784 if ( session != unescape(old_session) )
786 session_restore(session);
788 if (action == 'search') {
790 } else if (action == 'page') {
793 alert('Unregocnized action_type: ' + action);
798 url_surveillence = setInterval(session_check, 200);
802 function get_available_facets () {
803 var facet_container = document.getElementById('termlists');
804 var facet_cells = facet_container.childNodes;
805 var facets = Array();
808 for (i = 0; i < facet_cells.length; i++) {
809 var cell = facet_cells.item(i);
811 if (cell.className == 'facet') {
812 var facet_name = cell.id.replace(/^facet_([^_]+)_terms$/, "$1");
813 facets.push(Array(facet_name, cell));
821 function get_facet_container (obj) {
822 return document.getElementById(obj.id + '_terms');
826 function toggle_facet (obj) {
827 var container = get_facet_container(obj);
829 if (obj.className == 'selected') {
830 obj.className = 'unselected';
831 container.style.display = 'inline';
834 obj.className = 'selected';
835 container.style.display = 'none';