1 /* $Id: search.js,v 1.42 2007-01-18 18:11:19 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 name = node.getAttribute('name');
335 tr = paint_details_tr('Source', document.createTextNode(name));
337 tr = paint_details_tr('Source', document.createTextNode(zurl));
338 table.appendChild(tr);
339 paint_data_elements(table, node);
343 function paint_details(body, xml)
346 var table = document.createElement('table');
347 table.setAttribute('cellpadding', 2);
348 paint_data_elements(table, xml.childNodes[0]);
349 body.appendChild(table);
350 body.style.display = 'inline';
353 function show_details()
355 if (xfetchDetails.readyState != 4)
357 var xml = xfetchDetails.responseXML;
358 var error = xml.getElementsByTagName("error");
361 var msg = error[0].childNodes[0].nodeValue;
367 var idn = xml.getElementsByTagName('recid');
370 var id = idn[0].childNodes[0].nodeValue;
374 var nodes = document.getElementsByName('listrecord');
376 for (i = 0; i < nodes.length; i++)
378 var dets = nodes[i].getElementsByTagName('div');
380 dets[0].style.display = 'none';
383 var body = document.getElementById('rec_' + id);
386 paint_details(body, xml);
389 function hyperlink_search(obj)
391 var field = obj.getAttribute('searchfield');
392 var term = obj.getAttribute('term');
393 var queryfield = document.getElementById('query');
394 queryfield.value = field + '=' + term;
398 function fetch_details(id)
408 var url = "search.pz2?session=" + session +
411 SendXmlHttpObject(xfetchDetails = GetXmlHttpObject(), url, show_details);
414 function show_records()
416 if (xshow.readyState != 4)
419 var xml = xshow.responseXML;
420 var body = document.getElementById("body");
421 var hits = xml.getElementsByTagName("hit");
425 if (!hits[0]) // We should never get here with blocking operations
427 assign_text(body, 'No records yet');
428 searchtimer = setTimeout(check_search, 250);
432 var total = Number(xml.getElementsByTagName('total')[0].childNodes[0].nodeValue);
433 var merged = Number(xml.getElementsByTagName('merged')[0].childNodes[0].nodeValue);
434 var start = Number(xml.getElementsByTagName('start')[0].childNodes[0].nodeValue);
435 var num = Number(xml.getElementsByTagName('num')[0].childNodes[0].nodeValue);
436 var clients = Number(xml.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue);
437 var pager = make_pager(merged, start,recstoshow);
438 var break_node1 = document.createElement('br');
439 var break_node2 = document.createElement('br');
440 var record_container = document.createElement('div');
441 var interval = create_element('div', 'Records : ' + (start + 1) +
442 ' to ' + (start + num) + ' of ' +
443 merged + ' (total hits: ' +
446 interval.className = 'results';
447 record_container.className = 'records';
449 body.appendChild(pager);
450 body.appendChild(interval);
451 body.appendChild(break_node1);
452 body.appendChild(break_node2);
453 body.appendChild(record_container);
455 for (i = 0; i < hits.length; i++)
457 var tn = hits[i].getElementsByTagName("md-title");
459 var an = hits[i].getElementsByTagName("md-author");
461 var cn = hits[i].getElementsByTagName("count");
463 var idn = hits[i].getElementsByTagName("recid");
466 title = tn[0].childNodes[0].nodeValue;
470 if (an[0] && an[0].childNodes[0])
471 author = an[0].childNodes[0].nodeValue;
473 count = Number(cn[0].childNodes[0].nodeValue);
474 var id = idn[0].childNodes[0].nodeValue;
476 var record_div = document.createElement('div');
477 record_div.className = 'record';
478 record_div.setAttribute('name', 'listrecord');
480 var record_cell = create_element('a', title);
481 record_cell.setAttribute('href', '#' + id);
482 record_cell.setAttribute('onclick', 'fetch_details(' + id + '); return false');
483 record_div.appendChild(record_cell);
486 record_div.appendChild(document.createTextNode(', by '));
487 var al = create_element('a', author);
488 al.setAttribute('href', '#');
489 al.setAttribute('term', author);
490 al.setAttribute('searchfield', 'au');
491 al.onclick = function() { hyperlink_search(this); return false; };
492 record_div.appendChild(al);
495 record_div.appendChild(document.createTextNode(
496 ' (' + count + ')'));
497 var det_div = document.createElement('div');
499 paint_details(det_div, cur_rec);
501 det_div.style.display = 'none';
502 det_div.setAttribute('id', 'rec_' + id);
503 det_div.setAttribute('name', 'details');
504 record_div.appendChild(det_div);
505 record_container.appendChild(record_div);
512 searchtimer = setTimeout(check_search, 1000);
514 searchtimer = setTimeout(check_search, 2000);
518 termtimer = setTimeout(check_termlist, 500);
521 function check_search()
523 clearTimeout(searchtimer);
524 var url = "search.pz2?" +
526 "&start=" + document.search.startrec.value +
527 "&num=" + recstoshow +
528 "&session=" + session +
529 "&sort=" + cur_sort +
531 xshow = GetXmlHttpObject();
532 xshow.onreadystatechange=show_records;
533 xshow.open("GET", url);
538 function refine_query (obj) {
539 var term = obj.getAttribute('term');
540 var cur_termlist = obj.getAttribute('facet');
541 var query_cell = document.getElementById('query');
543 term = term.replace(/[\(\)]/g, '');
545 if (cur_termlist == 'subject')
546 query_cell.value += ' and su=' + term;
547 else if (cur_termlist == 'author')
548 query_cell.value += ' and au=' + term;
549 else if (cur_termlist == 'date')
550 query_cell.value += ' and date=' + term;
555 function clear_termlists()
558 for (i = 0; i < facet_list.length; i++)
559 clear_cell(facet_list[i][1]);
562 function show_termlists()
564 if (xtermlist.readyState != 4)
568 var xml = xtermlist.responseXML;
570 Number(xml.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue);
571 var lists = xml.getElementsByTagName("list");
573 for (i = 0; i < lists.length; i++)
575 var listname = lists[i].getAttribute('name');
576 var body = document.getElementById('facet_' + listname + '_terms');
577 if (body.style.display == 'none')
580 var terms = lists[i].getElementsByTagName('term');
582 for (t = 0; t < terms.length; t++)
584 var namen = terms[t].getElementsByTagName("name");
585 var freqn = terms[t].getElementsByTagName("frequency");
587 var term = namen[0].childNodes[0].nodeValue;
588 var freq = freqn[0].childNodes[0].nodeValue;
589 var refine_cell = create_element('a', term + ' (' + freq + ')');
590 refine_cell.setAttribute('href', '#');
591 refine_cell.setAttribute('term', term);
592 refine_cell.setAttribute('facet', listname);
593 refine_cell.onclick = function () {
597 body.appendChild(refine_cell);
601 termtimer = setTimeout(check_termlist, 1000);
604 function check_termlist()
606 var facet_names = '';
608 for (i = 0; i < facet_list.length; i++)
609 if (facet_list[i][1].style.display != 'none')
613 facet_names += facet_list[i][0];
615 var url = "search.pz2?" +
617 "&session=" + session +
618 "&name=" + facet_names +
620 SendXmlHttpObject(xtermlist = GetXmlHttpObject(), url, show_termlists);
625 if (xstat.readyState != 4)
628 var xml = xstat.responseXML;
629 var body = document.getElementById("stat");
630 var nodes = xml.childNodes[0].childNodes;
632 Number(xml.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue);
635 stattimer = setTimeout(check_stat, 500);
639 assign_text(body, '(');
640 for (i = 0; i < nodes.length; i++)
642 if (nodes[i].nodeType != 1)
644 var value = nodes[i].childNodes[0].nodeValue;
647 var name = nodes[i].nodeName;
648 append_text(body, ' ' + name + '=' + value);
651 append_text(body, ')');
653 stattimer = setTimeout(check_stat, 2000);
657 function check_stat()
659 var url = "search.pz2?" +
661 "&session=" + session;
662 xstat = GetXmlHttpObject();
663 xstat.onreadystatechange=show_stat;
664 xstat.open("GET", url);
668 function search_started()
670 if (xsearch.readyState != 4)
672 var xml = xsearch.responseXML;
673 var error = xml.getElementsByTagName("error");
676 var msg = error[0].childNodes[0].nodeValue;
681 stattimer = setTimeout(check_stat, 1000);
684 function start_search()
686 clearTimeout(termtimer);
688 clearTimeout(searchtimer);
690 clearTimeout(stattimer);
692 clearTimeout(showtimer);
696 var query = escape(document.getElementById('query').value);
697 var url = "search.pz2?" +
699 "&session=" + session +
701 xsearch = GetXmlHttpObject();
702 xsearch.onreadystatechange=search_started;
703 xsearch.open("GET", url);
705 clear_cell(document.getElementById("body"));
708 document.search.startrec.value = 0;
711 function session_encode ()
716 for (i = 0; i < session_cells.length; i++)
718 var name = session_cells[i];
719 var value = escape(document.getElementById(name).value);
720 session += '&' + name + '=' + value;
727 function session_restore (session)
729 var fields = session.split(/&/);
732 for (i = 1; i < fields.length; i++)
734 var pair = fields[i].split(/=/);
735 var key = pair.shift();
736 var value = pair.join('=');
737 var cell = document.getElementById(key);
745 function session_read ()
747 var ses = window.location.hash.replace(/^#/, '');
752 function session_store (new_value)
754 window.location.hash = '#' + new_value;
758 function update_history ()
760 var session = session_encode();
761 session_store(session);
762 old_session = session;
766 function session_check ()
768 var session = session_read();
769 var action = document.search.action_type.value;
771 clearInterval(url_surveillence);
773 if ( session != unescape(old_session) )
775 session_restore(session);
777 if (action == 'search') {
779 } else if (action == 'page') {
782 alert('Unregocnized action_type: ' + action);
787 url_surveillence = setInterval(session_check, 200);
791 function get_available_facets () {
792 var facet_container = document.getElementById('termlists');
793 var facet_cells = facet_container.childNodes;
794 var facets = Array();
797 for (i = 0; i < facet_cells.length; i++) {
798 var cell = facet_cells.item(i);
800 if (cell.className == 'facet') {
801 var facet_name = cell.id.replace(/^facet_([^_]+)_terms$/, "$1");
802 facets.push(Array(facet_name, cell));
810 function get_facet_container (obj) {
811 return document.getElementById(obj.id + '_terms');
815 function toggle_facet (obj) {
816 var container = get_facet_container(obj);
818 if (obj.className == 'selected') {
819 obj.className = 'unselected';
820 container.style.display = 'inline';
823 obj.className = 'selected';
824 container.style.display = 'none';