1 /* $Id: search.js,v 1.40 2007-01-18 16:31:05 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')
227 else if (name == 'md-title')
229 else if (name == 'md-id')
231 else if (name == 'recid')
233 else if (name == 'location')
239 function hyperlink_field(name)
241 if (name == 'md-author')
243 else if (name == 'md-subject')
245 else if (name == 'md-url')
251 function paint_details_tr(name, dn)
254 var dname = displayname(name);
255 var ln = create_element('b', dname);
256 var tln = document.createElement('td');
257 tln.setAttribute('width', 90);
258 tln.setAttribute('valign', 'top');
260 var tr = document.createElement('tr');
266 function paint_data_elements(target, node)
268 var nodes = node.childNodes;
272 for (i = 0; i < nodes.length; i++)
274 if (nodes[i].nodeType != 1)
276 var name = nodes[i].nodeName;
277 if (name == 'recid' || name == 'md-title')
279 if (name != lastname && lastname != 'location')
283 var tr = paint_details_tr(lastname, dn);
284 target.appendChild(tr);
286 dn = document.createElement('td');
289 if (name == 'location')
291 target.appendChild(paint_details_tr('Location', paint_subrecord(nodes[i])));
294 if (!nodes[i].childNodes[0])
296 var value = nodes[i].childNodes[0].nodeValue;
297 if (dn.childNodes[0])
298 dn.appendChild(document.createTextNode('; '));
299 var hyl = hyperlink_field(name);
303 nv = create_element('a', value);
306 nv.setAttribute('href', value);
307 nv.setAttribute('target', '_blank');
311 nv.setAttribute('href', '#');
312 nv.setAttribute('term', value);
313 nv.setAttribute('searchfield', hyl);
314 nv.onclick = function() { hyperlink_search(this); return false; };
318 nv = document.createTextNode(value);
321 if (dn && lastname != 'location')
323 var tr = paint_details_tr(lastname, dn);
324 target.appendChild(tr);
328 function paint_subrecord(node)
330 var table = document.createElement('table');
331 var zurl = node.getAttribute('id');
332 var tr = paint_details_tr('Source', document.createTextNode(zurl));
333 table.appendChild(tr);
334 paint_data_elements(table, node);
338 function paint_details(body, xml)
341 var table = document.createElement('table');
342 table.setAttribute('cellpadding', 2);
343 paint_data_elements(table, xml.childNodes[0]);
344 body.appendChild(table);
345 body.style.display = 'inline';
348 function show_details()
350 if (xfetchDetails.readyState != 4)
352 var xml = xfetchDetails.responseXML;
353 var error = xml.getElementsByTagName("error");
356 var msg = error[0].childNodes[0].nodeValue;
362 var idn = xml.getElementsByTagName('recid');
365 var id = idn[0].childNodes[0].nodeValue;
369 var nodes = document.getElementsByName('listrecord');
371 for (i = 0; i < nodes.length; i++)
373 var dets = nodes[i].getElementsByTagName('div');
375 dets[0].style.display = 'none';
378 var body = document.getElementById('rec_' + id);
381 paint_details(body, xml);
384 function hyperlink_search(obj)
386 var field = obj.getAttribute('searchfield');
387 var term = obj.getAttribute('term');
388 var queryfield = document.getElementById('query');
389 queryfield.value = field + '=' + term;
393 function fetch_details(id)
403 var url = "search.pz2?session=" + session +
406 SendXmlHttpObject(xfetchDetails = GetXmlHttpObject(), url, show_details);
409 function show_records()
411 if (xshow.readyState != 4)
414 var xml = xshow.responseXML;
415 var body = document.getElementById("body");
416 var hits = xml.getElementsByTagName("hit");
420 if (!hits[0]) // We should never get here with blocking operations
422 assign_text(body, 'No records yet');
423 searchtimer = setTimeout(check_search, 250);
427 var total = Number(xml.getElementsByTagName('total')[0].childNodes[0].nodeValue);
428 var merged = Number(xml.getElementsByTagName('merged')[0].childNodes[0].nodeValue);
429 var start = Number(xml.getElementsByTagName('start')[0].childNodes[0].nodeValue);
430 var num = Number(xml.getElementsByTagName('num')[0].childNodes[0].nodeValue);
431 var clients = Number(xml.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue);
432 var pager = make_pager(merged, start,recstoshow);
433 var break_node1 = document.createElement('br');
434 var break_node2 = document.createElement('br');
435 var record_container = document.createElement('div');
436 var interval = create_element('div', 'Records : ' + (start + 1) +
437 ' to ' + (start + num) + ' of ' +
438 merged + ' (total hits: ' +
441 interval.className = 'results';
442 record_container.className = 'records';
444 body.appendChild(pager);
445 body.appendChild(interval);
446 body.appendChild(break_node1);
447 body.appendChild(break_node2);
448 body.appendChild(record_container);
450 for (i = 0; i < hits.length; i++)
452 var tn = hits[i].getElementsByTagName("md-title");
454 var an = hits[i].getElementsByTagName("md-author");
456 var cn = hits[i].getElementsByTagName("count");
458 var idn = hits[i].getElementsByTagName("recid");
461 title = tn[0].childNodes[0].nodeValue;
465 if (an[0] && an[0].childNodes[0])
466 author = an[0].childNodes[0].nodeValue;
468 count = Number(cn[0].childNodes[0].nodeValue);
469 var id = idn[0].childNodes[0].nodeValue;
471 var record_div = document.createElement('div');
472 record_div.className = 'record';
473 record_div.setAttribute('name', 'listrecord');
475 var record_cell = create_element('a', title);
476 record_cell.setAttribute('href', '#' + id);
477 record_cell.setAttribute('onclick', 'fetch_details(' + id + '); return false');
478 record_div.appendChild(record_cell);
481 record_div.appendChild(document.createTextNode(', by '));
482 var al = create_element('a', author);
483 al.setAttribute('href', '#');
484 al.setAttribute('term', author);
485 al.setAttribute('searchfield', 'au');
486 al.onclick = function() { hyperlink_search(this); return false; };
487 record_div.appendChild(al);
490 record_div.appendChild(document.createTextNode(
491 ' (' + count + ')'));
492 var det_div = document.createElement('div');
494 paint_details(det_div, cur_rec);
496 det_div.style.display = 'none';
497 det_div.setAttribute('id', 'rec_' + id);
498 det_div.setAttribute('name', 'details');
499 record_div.appendChild(det_div);
500 record_container.appendChild(record_div);
507 searchtimer = setTimeout(check_search, 1000);
509 searchtimer = setTimeout(check_search, 2000);
513 termtimer = setTimeout(check_termlist, 500);
516 function check_search()
518 clearTimeout(searchtimer);
519 var url = "search.pz2?" +
521 "&start=" + document.search.startrec.value +
522 "&num=" + recstoshow +
523 "&session=" + session +
524 "&sort=" + cur_sort +
526 xshow = GetXmlHttpObject();
527 xshow.onreadystatechange=show_records;
528 xshow.open("GET", url);
533 function refine_query (obj) {
534 var term = obj.getAttribute('term');
535 var cur_termlist = obj.getAttribute('facet');
536 var query_cell = document.getElementById('query');
538 term = term.replace(/[\(\)]/g, '');
540 if (cur_termlist == 'subject')
541 query_cell.value += ' and su=(' + term + ')';
542 else if (cur_termlist == 'author')
543 query_cell.value += ' and au=(' + term + ')';
544 else if (cur_termlist == 'date')
545 query_cell.value += ' and date=' + term;
550 function clear_termlists()
553 for (i = 0; i < facet_list.length; i++)
554 clear_cell(facet_list[i][1]);
557 function show_termlists()
559 if (xtermlist.readyState != 4)
563 var xml = xtermlist.responseXML;
565 Number(xml.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue);
566 var lists = xml.getElementsByTagName("list");
568 for (i = 0; i < lists.length; i++)
570 var listname = lists[i].getAttribute('name');
571 var body = document.getElementById('facet_' + listname + '_terms');
572 if (body.style.display == 'none')
575 var terms = lists[i].getElementsByTagName('term');
577 for (t = 0; t < terms.length; t++)
579 var namen = terms[t].getElementsByTagName("name");
580 var freqn = terms[t].getElementsByTagName("frequency");
582 var term = namen[0].childNodes[0].nodeValue;
583 var freq = freqn[0].childNodes[0].nodeValue;
584 var refine_cell = create_element('a', term + ' (' + freq + ')');
585 refine_cell.setAttribute('href', '#');
586 refine_cell.setAttribute('term', term);
587 refine_cell.setAttribute('facet', listname);
588 refine_cell.onclick = function () {
592 body.appendChild(refine_cell);
596 termtimer = setTimeout(check_termlist, 1000);
599 function check_termlist()
601 var facet_names = '';
603 for (i = 0; i < facet_list.length; i++)
604 if (facet_list[i][1].style.display != 'none')
608 facet_names += facet_list[i][0];
610 var url = "search.pz2?" +
612 "&session=" + session +
613 "&name=" + facet_names +
615 SendXmlHttpObject(xtermlist = GetXmlHttpObject(), url, show_termlists);
620 if (xstat.readyState != 4)
623 var xml = xstat.responseXML;
624 var body = document.getElementById("stat");
625 var nodes = xml.childNodes[0].childNodes;
627 Number(xml.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue);
630 stattimer = setTimeout(check_stat, 500);
634 assign_text(body, '(');
635 for (i = 0; i < nodes.length; i++)
637 if (nodes[i].nodeType != 1)
639 var value = nodes[i].childNodes[0].nodeValue;
642 var name = nodes[i].nodeName;
643 append_text(body, ' ' + name + '=' + value);
646 append_text(body, ')');
648 stattimer = setTimeout(check_stat, 2000);
652 function check_stat()
654 var url = "search.pz2?" +
656 "&session=" + session;
657 xstat = GetXmlHttpObject();
658 xstat.onreadystatechange=show_stat;
659 xstat.open("GET", url);
663 function search_started()
665 if (xsearch.readyState != 4)
667 var xml = xsearch.responseXML;
668 var error = xml.getElementsByTagName("error");
671 var msg = error[0].childNodes[0].nodeValue;
676 stattimer = setTimeout(check_stat, 1000);
679 function start_search()
681 clearTimeout(termtimer);
683 clearTimeout(searchtimer);
685 clearTimeout(stattimer);
687 clearTimeout(showtimer);
691 var query = escape(document.getElementById('query').value);
692 var url = "search.pz2?" +
694 "&session=" + session +
696 xsearch = GetXmlHttpObject();
697 xsearch.onreadystatechange=search_started;
698 xsearch.open("GET", url);
700 clear_cell(document.getElementById("body"));
703 document.search.startrec.value = 0;
706 function session_encode ()
711 for (i = 0; i < session_cells.length; i++)
713 var name = session_cells[i];
714 var value = escape(document.getElementById(name).value);
715 session += '&' + name + '=' + value;
722 function session_restore (session)
724 var fields = session.split(/&/);
727 for (i = 1; i < fields.length; i++)
729 var pair = fields[i].split(/=/);
730 var key = pair.shift();
731 var value = pair.join('=');
732 var cell = document.getElementById(key);
740 function session_read ()
742 var ses = window.location.hash.replace(/^#/, '');
747 function session_store (new_value)
749 window.location.hash = '#' + new_value;
753 function update_history ()
755 var session = session_encode();
756 session_store(session);
757 old_session = session;
761 function session_check ()
763 var session = session_read();
764 var action = document.search.action_type.value;
766 clearInterval(url_surveillence);
768 if ( session != unescape(old_session) )
770 session_restore(session);
772 if (action == 'search') {
774 } else if (action == 'page') {
777 alert('Unregocnized action_type: ' + action);
782 url_surveillence = setInterval(session_check, 200);
786 function get_available_facets () {
787 var facet_container = document.getElementById('termlists');
788 var facet_cells = facet_container.childNodes;
789 var facets = Array();
792 for (i = 0; i < facet_cells.length; i++) {
793 var cell = facet_cells.item(i);
795 if (cell.className == 'facet') {
796 var facet_name = cell.id.replace(/^facet_([^_]+)_terms$/, "$1");
797 facets.push(Array(facet_name, cell));
805 function get_facet_container (obj) {
806 return document.getElementById(obj.id + '_terms');
810 function toggle_facet (obj) {
811 var container = get_facet_container(obj);
813 if (obj.className == 'selected') {
814 obj.className = 'unselected';
815 container.style.display = 'inline';
818 obj.className = 'selected';
819 container.style.display = 'none';