1 /* $Id: search.js,v 1.48 2007-02-08 02:08:47 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);
341 else if (name == 'md-isbn')
343 nv = document.createElement('span');
344 nv.appendChild(document.createTextNode(value + ' '));
345 var link = create_element('a', 'search OpenWorldCat');
346 link.setAttribute('target', '_blank');
347 link.setAttribute('href', 'http://www.worldcat.org/search?q=isbn%3A' + value);
348 nv.appendChild(link);
351 nv = document.createTextNode(value);
354 if (dn && lastname != 'location')
356 var tr = paint_details_tr(lastname, dn);
357 target.appendChild(tr);
361 function paint_subrecord(node)
363 var table = document.createElement('table');
364 var tbody = document.createElement('tbody');
365 var zurl = node.getAttribute('id');
366 var name = node.getAttribute('name');
370 td = create_element('td', name);
372 td = create_element('td', zurl);
373 tr = paint_details_tr('Source', td);
374 tbody.appendChild(tr);
375 paint_data_elements(tbody, node);
376 table.appendChild(tbody);
380 function paint_details(body, xml)
383 var table = document.createElement('table');
384 var tbody = document.createElement('tbody');
385 table.setAttribute('cellpadding', 2);
386 paint_data_elements(tbody, xml.childNodes[0]);
387 table.appendChild(tbody);
388 body.appendChild(table);
389 body.style.display = 'inline';
392 function show_details()
394 if (xfetchDetails.readyState != 4)
396 var xml = xfetchDetails.responseXML;
397 var error = xml.getElementsByTagName("error");
400 var msg = error[0].childNodes[0].nodeValue;
406 var idn = xml.getElementsByTagName('recid');
409 var id = idn[0].childNodes[0].nodeValue;
413 var nodes = document.getElementsByName('listrecord');
415 for (i = 0; i < nodes.length; i++)
417 var dets = nodes[i].getElementsByTagName('div');
419 dets[0].style.display = 'none';
422 var body = document.getElementById('rec_' + id);
425 paint_details(body, xml);
428 function hyperlink_search(obj)
430 var field = obj.getAttribute('searchfield');
431 var term = obj.getAttribute('term');
432 var queryfield = document.getElementById('query');
433 queryfield.value = field + '="' + term + '"';
437 function fetch_details(id)
447 var url = "search.pz2?session=" + session +
450 SendXmlHttpObject(xfetchDetails = GetXmlHttpObject(), url, show_details);
453 function show_records()
455 if (xshow.readyState != 4)
458 var xml = xshow.responseXML;
459 var body = document.getElementById("body");
460 var hits = xml.getElementsByTagName("hit");
464 if (!hits[0]) // We should never get here with blocking operations
466 assign_text(body, 'No records yet');
467 searchtimer = setTimeout(check_search, 250);
471 var total = Number(xml.getElementsByTagName('total')[0].childNodes[0].nodeValue);
472 var merged = Number(xml.getElementsByTagName('merged')[0].childNodes[0].nodeValue);
473 var start = Number(xml.getElementsByTagName('start')[0].childNodes[0].nodeValue);
474 var num = Number(xml.getElementsByTagName('num')[0].childNodes[0].nodeValue);
475 var clients = Number(xml.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue);
476 var pager = make_pager(merged, start,recstoshow);
477 var break_node1 = document.createElement('br');
478 var break_node2 = document.createElement('br');
479 var record_container = document.createElement('div');
480 var interval = create_element('div', 'Records : ' + (start + 1) +
481 ' to ' + (start + num) + ' of ' +
482 merged + ' (total hits: ' +
485 interval.className = 'results';
486 record_container.className = 'records';
488 body.appendChild(pager);
489 body.appendChild(interval);
490 body.appendChild(break_node1);
491 body.appendChild(break_node2);
492 body.appendChild(record_container);
494 for (i = 0; i < hits.length; i++)
496 var tn = hits[i].getElementsByTagName("md-title");
498 var an = hits[i].getElementsByTagName("md-author");
500 var cn = hits[i].getElementsByTagName("count");
502 var idn = hits[i].getElementsByTagName("recid");
504 if (tn[0] && tn[0].childNodes[0]) {
505 title = tn[0].childNodes[0].nodeValue;
509 if (an[0] && an[0].childNodes[0])
510 author = an[0].childNodes[0].nodeValue;
512 count = Number(cn[0].childNodes[0].nodeValue);
513 var id = idn[0].childNodes[0].nodeValue;
515 var record_div = document.createElement('div');
516 record_div.className = 'record';
517 record_div.setAttribute('name', 'listrecord');
519 var record_cell = create_element('a', title);
520 record_cell.setAttribute('href', '#' + id);
521 record_cell.setAttribute('id', id);
522 //record_cell.onclick = function() { fetch_details(this.getAttribute('id')); return false; }
523 record_cell.onclick = function() { fetch_details(this.getAttribute('id')); return false; };
524 record_div.appendChild(record_cell);
527 record_div.appendChild(document.createTextNode(', by '));
528 var al = create_element('a', author);
529 al.setAttribute('href', '#');
530 al.setAttribute('term', author);
531 al.setAttribute('searchfield', 'au');
532 al.onclick = function() { hyperlink_search(this); return false; };
533 record_div.appendChild(al);
536 record_div.appendChild(document.createTextNode(
537 ' (' + count + ')'));
538 var det_div = document.createElement('div');
540 paint_details(det_div, cur_rec);
542 det_div.style.display = 'none';
543 det_div.setAttribute('id', 'rec_' + id);
544 det_div.setAttribute('name', 'details');
545 record_div.appendChild(det_div);
546 record_container.appendChild(record_div);
553 searchtimer = setTimeout(check_search, 1000);
555 searchtimer = setTimeout(check_search, 2000);
559 termtimer = setTimeout(check_termlist, 500);
562 function check_search()
564 clearTimeout(searchtimer);
565 var url = "search.pz2?" +
567 "&start=" + document.search.startrec.value +
568 "&num=" + recstoshow +
569 "&session=" + session +
570 "&sort=" + cur_sort +
572 xshow = GetXmlHttpObject();
573 xshow.onreadystatechange=show_records;
574 xshow.open("GET", url);
579 function refine_query (obj) {
580 var term = obj.getAttribute('term');
581 var cur_termlist = obj.getAttribute('facet');
582 var query_cell = document.getElementById('query');
584 term = term.replace(/[\(\)]/g, '');
586 if (cur_termlist == 'subject')
587 query_cell.value += ' and su="' + term + '"';
588 else if (cur_termlist == 'author')
589 query_cell.value += ' and au="' + term + '"';
590 else if (cur_termlist == 'date')
591 query_cell.value += ' and date="' + term + '"';
596 function clear_termlists()
599 for (i = 0; i < facet_list.length; i++)
600 clear_cell(facet_list[i][1]);
603 function show_termlists()
605 if (xtermlist.readyState != 4)
609 var xml = xtermlist.responseXML;
611 Number(xml.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue);
612 var lists = xml.getElementsByTagName("list");
614 for (i = 0; i < lists.length; i++)
616 var listname = lists[i].getAttribute('name');
617 var body = document.getElementById('facet_' + listname + '_terms');
618 if (body.style.display == 'none')
621 var terms = lists[i].getElementsByTagName('term');
623 for (t = 0; t < terms.length; t++)
625 var namen = terms[t].getElementsByTagName("name");
626 var freqn = terms[t].getElementsByTagName("frequency");
628 var term = namen[0].childNodes[0].nodeValue;
629 var freq = freqn[0].childNodes[0].nodeValue;
630 var refine_cell = create_element('a', term + ' (' + freq + ')');
631 refine_cell.setAttribute('href', '#');
632 refine_cell.setAttribute('term', term);
633 refine_cell.setAttribute('facet', listname);
634 refine_cell.onclick = function () {
638 body.appendChild(refine_cell);
642 termtimer = setTimeout(check_termlist, 1000);
645 function check_termlist()
647 var facet_names = '';
649 for (i = 0; i < facet_list.length; i++)
650 if (facet_list[i][1].style.display != 'none')
654 facet_names += facet_list[i][0];
656 var url = "search.pz2?" +
658 "&session=" + session +
659 "&name=" + facet_names +
661 SendXmlHttpObject(xtermlist = GetXmlHttpObject(), url, show_termlists);
666 if (xstat.readyState != 4)
669 var xml = xstat.responseXML;
670 var body = document.getElementById("stat");
671 var nodes = xml.childNodes[0].childNodes;
673 Number(xml.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue);
676 stattimer = setTimeout(check_stat, 500);
680 assign_text(body, '(');
681 for (i = 0; i < nodes.length; i++)
683 if (nodes[i].nodeType != 1)
685 var value = nodes[i].childNodes[0].nodeValue;
688 var name = nodes[i].nodeName;
689 append_text(body, ' ' + name + '=' + value);
692 append_text(body, ')');
694 stattimer = setTimeout(check_stat, 2000);
698 function check_stat()
700 var url = "search.pz2?" +
702 "&session=" + session;
703 xstat = GetXmlHttpObject();
704 xstat.onreadystatechange=show_stat;
705 xstat.open("GET", url);
709 function search_started()
711 if (xsearch.readyState != 4)
713 var xml = xsearch.responseXML;
714 var error = xml.getElementsByTagName("error");
717 var msg = error[0].childNodes[0].nodeValue;
722 stattimer = setTimeout(check_stat, 1000);
725 function start_search()
727 clearTimeout(termtimer);
729 clearTimeout(searchtimer);
731 clearTimeout(stattimer);
733 clearTimeout(showtimer);
737 var query = escape(document.getElementById('query').value);
738 var url = "search.pz2?" +
740 "&session=" + session +
742 xsearch = GetXmlHttpObject();
743 xsearch.onreadystatechange=search_started;
744 xsearch.open("GET", url);
746 clear_cell(document.getElementById("body"));
749 document.search.startrec.value = 0;
752 function session_encode ()
757 for (i = 0; i < session_cells.length; i++)
759 var name = session_cells[i];
760 var value = escape(document.getElementById(name).value);
761 session += '&' + name + '=' + value;
768 function session_restore (session)
770 var fields = session.split(/&/);
773 for (i = 1; i < fields.length; i++)
775 var pair = fields[i].split(/=/);
776 var key = pair.shift();
777 var value = pair.join('=');
778 var cell = document.getElementById(key);
786 function session_read ()
788 var ses = window.location.hash.replace(/^#/, '');
793 function session_store (new_value)
795 window.location.hash = '#' + new_value;
799 function update_history ()
801 var session = session_encode();
802 session_store(session);
803 old_session = session;
807 function session_check ()
809 var session = session_read();
810 var action = document.search.action_type.value;
812 clearInterval(url_surveillence);
814 if ( session != unescape(old_session) )
816 session_restore(session);
818 if (action == 'search') {
820 } else if (action == 'page') {
823 alert('Unregocnized action_type: ' + action);
828 url_surveillence = setInterval(session_check, 200);
832 function get_available_facets () {
833 var facet_container = document.getElementById('termlists');
834 var facet_cells = facet_container.childNodes;
835 var facets = Array();
838 for (i = 0; i < facet_cells.length; i++) {
839 var cell = facet_cells.item(i);
841 if (cell.className == 'facet') {
842 var facet_name = cell.id.replace(/^facet_([^_]+)_terms$/, "$1");
843 facets.push(Array(facet_name, cell));
851 function get_facet_container (obj) {
852 return document.getElementById(obj.id + '_terms');
856 function toggle_facet (obj) {
857 var container = get_facet_container(obj);
859 if (obj.className == 'selected') {
860 obj.className = 'unselected';
861 container.style.display = 'inline';
864 obj.className = 'selected';
865 container.style.display = 'none';