1 /* $Id: search.js,v 1.47 2007-02-06 23:22:49 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 elem_node.innerHTML = cdata;
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('id', opt);
191 a.onclick = function() { set_sort(this.getAttribute('id')); 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')
227 else if (name == 'md-title')
229 else if (name == 'md-id')
231 else if (name == 'md-description')
232 return 'Description';
233 else if (name == 'md-lccn')
235 else if (name == 'recid')
237 else if (name == 'location')
243 function hyperlink_field(name)
245 if (name == 'md-author')
247 else if (name == 'md-subject')
249 else if (name == 'md-url')
255 function paint_details_tr(name, dn)
258 var dname = displayname(name);
259 var ln = create_element('b', dname);
260 var tln = document.createElement('td');
264 var tr = document.createElement('tr');
273 var v2 = v1.replace(/\?.*$/, "");
274 var v3 = v2.replace(/http:\/\//, "");
278 function paint_data_elements(target, node)
280 var nodes = node.childNodes;
284 for (i = 0; i < nodes.length; i++)
286 if (nodes[i].nodeType != 1)
288 var name = nodes[i].nodeName;
289 if (name == 'recid' || name == 'md-title')
291 if (name != lastname && lastname != 'location')
295 var tr = paint_details_tr(lastname, dn);
296 target.appendChild(tr);
298 dn = document.createElement('td');
301 if (name == 'location')
303 dn = document.createElement('td');
304 dn.appendChild(paint_subrecord(nodes[i]));
305 target.appendChild(paint_details_tr('Location', dn));
308 if (!nodes[i].childNodes[0])
310 var value = nodes[i].childNodes[0].nodeValue;
311 if (dn.childNodes[0])
312 dn.appendChild(document.createTextNode('; '));
313 var hyl = hyperlink_field(name);
317 nv = create_element('a', cleanurl(value));
321 nv.target = '_blank';
326 nv.setAttribute('term', value);
327 nv.setAttribute('searchfield', hyl);
328 nv.onclick = function() { hyperlink_search(this); return false; };
331 else if (name == 'md-lccn')
333 nv = document.createElement('span');
334 nv.appendChild(document.createTextNode(value + ' '));
335 var link = create_element('a', 'Show title in LoC');
336 link.setAttribute('target', '_blank');
337 link.setAttribute('href', 'http://catalog.loc.gov/cgi-bin/Pwebrecon.cgi?DB=local&CNT=10&CMD=10+records+per+page&CMD=lccn+' + value);
338 nv.appendChild(link);
342 nv = document.createTextNode(value);
345 if (dn && lastname != 'location')
347 var tr = paint_details_tr(lastname, dn);
348 target.appendChild(tr);
352 function paint_subrecord(node)
354 var table = document.createElement('table');
355 var tbody = document.createElement('tbody');
356 var zurl = node.getAttribute('id');
357 var name = node.getAttribute('name');
361 td = create_element('td', name);
363 td = create_element('td', zurl);
364 tr = paint_details_tr('Source', td);
365 tbody.appendChild(tr);
366 paint_data_elements(tbody, node);
367 table.appendChild(tbody);
371 function paint_details(body, xml)
374 var table = document.createElement('table');
375 var tbody = document.createElement('tbody');
376 table.setAttribute('cellpadding', 2);
377 paint_data_elements(tbody, xml.childNodes[0]);
378 table.appendChild(tbody);
379 body.appendChild(table);
380 body.style.display = 'inline';
383 function show_details()
385 if (xfetchDetails.readyState != 4)
387 var xml = xfetchDetails.responseXML;
388 var error = xml.getElementsByTagName("error");
391 var msg = error[0].childNodes[0].nodeValue;
397 var idn = xml.getElementsByTagName('recid');
400 var id = idn[0].childNodes[0].nodeValue;
404 var nodes = document.getElementsByName('listrecord');
406 for (i = 0; i < nodes.length; i++)
408 var dets = nodes[i].getElementsByTagName('div');
410 dets[0].style.display = 'none';
413 var body = document.getElementById('rec_' + id);
416 paint_details(body, xml);
419 function hyperlink_search(obj)
421 var field = obj.getAttribute('searchfield');
422 var term = obj.getAttribute('term');
423 var queryfield = document.getElementById('query');
424 queryfield.value = field + '="' + term + '"';
428 function fetch_details(id)
438 var url = "search.pz2?session=" + session +
441 SendXmlHttpObject(xfetchDetails = GetXmlHttpObject(), url, show_details);
444 function show_records()
446 if (xshow.readyState != 4)
449 var xml = xshow.responseXML;
450 var body = document.getElementById("body");
451 var hits = xml.getElementsByTagName("hit");
455 if (!hits[0]) // We should never get here with blocking operations
457 assign_text(body, 'No records yet');
458 searchtimer = setTimeout(check_search, 250);
462 var total = Number(xml.getElementsByTagName('total')[0].childNodes[0].nodeValue);
463 var merged = Number(xml.getElementsByTagName('merged')[0].childNodes[0].nodeValue);
464 var start = Number(xml.getElementsByTagName('start')[0].childNodes[0].nodeValue);
465 var num = Number(xml.getElementsByTagName('num')[0].childNodes[0].nodeValue);
466 var clients = Number(xml.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue);
467 var pager = make_pager(merged, start,recstoshow);
468 var break_node1 = document.createElement('br');
469 var break_node2 = document.createElement('br');
470 var record_container = document.createElement('div');
471 var interval = create_element('div', 'Records : ' + (start + 1) +
472 ' to ' + (start + num) + ' of ' +
473 merged + ' (total hits: ' +
476 interval.className = 'results';
477 record_container.className = 'records';
479 body.appendChild(pager);
480 body.appendChild(interval);
481 body.appendChild(break_node1);
482 body.appendChild(break_node2);
483 body.appendChild(record_container);
485 for (i = 0; i < hits.length; i++)
487 var tn = hits[i].getElementsByTagName("md-title");
489 var an = hits[i].getElementsByTagName("md-author");
491 var cn = hits[i].getElementsByTagName("count");
493 var idn = hits[i].getElementsByTagName("recid");
495 if (tn[0] && tn[0].childNodes[0]) {
496 title = tn[0].childNodes[0].nodeValue;
500 if (an[0] && an[0].childNodes[0])
501 author = an[0].childNodes[0].nodeValue;
503 count = Number(cn[0].childNodes[0].nodeValue);
504 var id = idn[0].childNodes[0].nodeValue;
506 var record_div = document.createElement('div');
507 record_div.className = 'record';
508 record_div.setAttribute('name', 'listrecord');
510 var record_cell = create_element('a', title);
511 record_cell.setAttribute('href', '#' + id);
512 record_cell.setAttribute('id', id);
513 //record_cell.onclick = function() { fetch_details(this.getAttribute('id')); return false; }
514 record_cell.onclick = function() { fetch_details(this.getAttribute('id')); return false; };
515 record_div.appendChild(record_cell);
518 record_div.appendChild(document.createTextNode(', by '));
519 var al = create_element('a', author);
520 al.setAttribute('href', '#');
521 al.setAttribute('term', author);
522 al.setAttribute('searchfield', 'au');
523 al.onclick = function() { hyperlink_search(this); return false; };
524 record_div.appendChild(al);
527 record_div.appendChild(document.createTextNode(
528 ' (' + count + ')'));
529 var det_div = document.createElement('div');
531 paint_details(det_div, cur_rec);
533 det_div.style.display = 'none';
534 det_div.setAttribute('id', 'rec_' + id);
535 det_div.setAttribute('name', 'details');
536 record_div.appendChild(det_div);
537 record_container.appendChild(record_div);
544 searchtimer = setTimeout(check_search, 1000);
546 searchtimer = setTimeout(check_search, 2000);
550 termtimer = setTimeout(check_termlist, 500);
553 function check_search()
555 clearTimeout(searchtimer);
556 var url = "search.pz2?" +
558 "&start=" + document.search.startrec.value +
559 "&num=" + recstoshow +
560 "&session=" + session +
561 "&sort=" + cur_sort +
563 xshow = GetXmlHttpObject();
564 xshow.onreadystatechange=show_records;
565 xshow.open("GET", url);
570 function refine_query (obj) {
571 var term = obj.getAttribute('term');
572 var cur_termlist = obj.getAttribute('facet');
573 var query_cell = document.getElementById('query');
575 term = term.replace(/[\(\)]/g, '');
577 if (cur_termlist == 'subject')
578 query_cell.value += ' and su="' + term + '"';
579 else if (cur_termlist == 'author')
580 query_cell.value += ' and au="' + term + '"';
581 else if (cur_termlist == 'date')
582 query_cell.value += ' and date="' + term + '"';
587 function clear_termlists()
590 for (i = 0; i < facet_list.length; i++)
591 clear_cell(facet_list[i][1]);
594 function show_termlists()
596 if (xtermlist.readyState != 4)
600 var xml = xtermlist.responseXML;
602 Number(xml.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue);
603 var lists = xml.getElementsByTagName("list");
605 for (i = 0; i < lists.length; i++)
607 var listname = lists[i].getAttribute('name');
608 var body = document.getElementById('facet_' + listname + '_terms');
609 if (body.style.display == 'none')
612 var terms = lists[i].getElementsByTagName('term');
614 for (t = 0; t < terms.length; t++)
616 var namen = terms[t].getElementsByTagName("name");
617 var freqn = terms[t].getElementsByTagName("frequency");
619 var term = namen[0].childNodes[0].nodeValue;
620 var freq = freqn[0].childNodes[0].nodeValue;
621 var refine_cell = create_element('a', term + ' (' + freq + ')');
622 refine_cell.setAttribute('href', '#');
623 refine_cell.setAttribute('term', term);
624 refine_cell.setAttribute('facet', listname);
625 refine_cell.onclick = function () {
629 body.appendChild(refine_cell);
633 termtimer = setTimeout(check_termlist, 1000);
636 function check_termlist()
638 var facet_names = '';
640 for (i = 0; i < facet_list.length; i++)
641 if (facet_list[i][1].style.display != 'none')
645 facet_names += facet_list[i][0];
647 var url = "search.pz2?" +
649 "&session=" + session +
650 "&name=" + facet_names +
652 SendXmlHttpObject(xtermlist = GetXmlHttpObject(), url, show_termlists);
657 if (xstat.readyState != 4)
660 var xml = xstat.responseXML;
661 var body = document.getElementById("stat");
662 var nodes = xml.childNodes[0].childNodes;
664 Number(xml.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue);
667 stattimer = setTimeout(check_stat, 500);
671 assign_text(body, '(');
672 for (i = 0; i < nodes.length; i++)
674 if (nodes[i].nodeType != 1)
676 var value = nodes[i].childNodes[0].nodeValue;
679 var name = nodes[i].nodeName;
680 append_text(body, ' ' + name + '=' + value);
683 append_text(body, ')');
685 stattimer = setTimeout(check_stat, 2000);
689 function check_stat()
691 var url = "search.pz2?" +
693 "&session=" + session;
694 xstat = GetXmlHttpObject();
695 xstat.onreadystatechange=show_stat;
696 xstat.open("GET", url);
700 function search_started()
702 if (xsearch.readyState != 4)
704 var xml = xsearch.responseXML;
705 var error = xml.getElementsByTagName("error");
708 var msg = error[0].childNodes[0].nodeValue;
713 stattimer = setTimeout(check_stat, 1000);
716 function start_search()
718 clearTimeout(termtimer);
720 clearTimeout(searchtimer);
722 clearTimeout(stattimer);
724 clearTimeout(showtimer);
728 var query = escape(document.getElementById('query').value);
729 var url = "search.pz2?" +
731 "&session=" + session +
733 xsearch = GetXmlHttpObject();
734 xsearch.onreadystatechange=search_started;
735 xsearch.open("GET", url);
737 clear_cell(document.getElementById("body"));
740 document.search.startrec.value = 0;
743 function session_encode ()
748 for (i = 0; i < session_cells.length; i++)
750 var name = session_cells[i];
751 var value = escape(document.getElementById(name).value);
752 session += '&' + name + '=' + value;
759 function session_restore (session)
761 var fields = session.split(/&/);
764 for (i = 1; i < fields.length; i++)
766 var pair = fields[i].split(/=/);
767 var key = pair.shift();
768 var value = pair.join('=');
769 var cell = document.getElementById(key);
777 function session_read ()
779 var ses = window.location.hash.replace(/^#/, '');
784 function session_store (new_value)
786 window.location.hash = '#' + new_value;
790 function update_history ()
792 var session = session_encode();
793 session_store(session);
794 old_session = session;
798 function session_check ()
800 var session = session_read();
801 var action = document.search.action_type.value;
803 clearInterval(url_surveillence);
805 if ( session != unescape(old_session) )
807 session_restore(session);
809 if (action == 'search') {
811 } else if (action == 'page') {
814 alert('Unregocnized action_type: ' + action);
819 url_surveillence = setInterval(session_check, 200);
823 function get_available_facets () {
824 var facet_container = document.getElementById('termlists');
825 var facet_cells = facet_container.childNodes;
826 var facets = Array();
829 for (i = 0; i < facet_cells.length; i++) {
830 var cell = facet_cells.item(i);
832 if (cell.className == 'facet') {
833 var facet_name = cell.id.replace(/^facet_([^_]+)_terms$/, "$1");
834 facets.push(Array(facet_name, cell));
842 function get_facet_container (obj) {
843 return document.getElementById(obj.id + '_terms');
847 function toggle_facet (obj) {
848 var container = get_facet_container(obj);
850 if (obj.className == 'selected') {
851 obj.className = 'unselected';
852 container.style.display = 'inline';
855 obj.className = 'selected';
856 container.style.display = 'none';