1 /* $Id: search.js,v 1.30 2007-01-16 19:21:05 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
28 var cur_sort = "relevance";
33 function initialize ()
35 facet_list = get_available_facets();
41 function GetXmlHttpObject()
44 if (window.XMLHttpRequest)
46 objXMLHttp=new XMLHttpRequest()
48 else if (window.ActiveXObject)
50 objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP")
55 function SendXmlHttpObject(obj, url, handler)
57 obj.onreadystatechange=handler;
62 function session_started()
64 if (xinitSession.readyState != 4)
66 var xml = xinitSession.responseXML;
67 var sesid = xml.getElementsByTagName("session")[0].childNodes[0].nodeValue;
68 assign_text(document.getElementById("status"), 'Live');
70 setTimeout(ping_session, 50000);
73 function start_session()
75 xinitSession = GetXmlHttpObject();
76 var url="search.pz2?";
77 url += "command=init";
78 xinitSession.onreadystatechange=session_started;
79 xinitSession.open("GET", url);
80 xinitSession.send(null);
83 function ping_session()
87 var url = "search.pz2?command=ping&session=" + session;
88 SendXmlHttpObject(xpingSession = GetXmlHttpObject(), url, session_pinged);
91 function session_pinged()
93 if (xpingSession.readyState != 4)
95 var xml = xpingSession.responseXML;
96 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')
229 function paint_details_tr(name, dn)
232 var dname = displayname(name);
233 var ln = create_element('b', dname);
234 var tln = document.createElement('td');
235 tln.setAttribute('width', 70);
237 var tr = document.createElement('tr');
243 function paint_details(body, xml)
246 //body.appendChild(document.createElement('br'));
247 var nodes = xml.childNodes[0].childNodes;
249 var table = document.createElement('table');
250 table.setAttribute('cellpadding', 2);
253 for (i = 0; i < nodes.length; i++)
255 if (nodes[i].nodeType != 1)
257 var name = nodes[i].nodeName;
258 if (name == 'recid' || name == 'md-title')
260 if (name != lastname)
264 var tr = paint_details_tr(lastname, dn);
265 table.appendChild(tr);
267 dn = document.createElement('td');
271 if (!nodes[i].childNodes[0])
273 var value = nodes[i].childNodes[0].nodeValue;
274 if (dn.childNodes[0])
275 value = '; ' + value;
276 var nv = document.createTextNode(value);
281 var tr = paint_details_tr(lastname, dn);
282 table.appendChild(tr);
284 body.appendChild(table);
285 body.style.display = 'inline';
288 function show_details()
290 if (xfetchDetails.readyState != 4)
292 var xml = xfetchDetails.responseXML;
293 var error = xml.getElementsByTagName("error");
296 var msg = error[0].childNodes[0].nodeValue;
302 // This is some ugly display code. Replace with your own ting o'beauty
304 var idn = xml.getElementsByTagName('recid');
307 var id = idn[0].childNodes[0].nodeValue;
311 var body = document.getElementById('rec_' + id);
314 paint_details(body, xml);
317 function hyperlink_search(field, obj)
319 var term = obj.getAttribute('term');
320 var queryfield = document.getElementById('query');
321 queryfield.value = field + '=' + term;
325 function fetch_details(id)
328 var nodes = document.getElementsByName('listrecord');
330 for (i = 0; i < nodes.length; i++)
332 var dets = nodes[i].getElementsByTagName('div');
334 dets[0].style.display = 'none';
343 var url = "search.pz2?session=" + session +
346 SendXmlHttpObject(xfetchDetails = GetXmlHttpObject(), url, show_details);
349 function show_records()
351 if (xshow.readyState != 4)
354 var xml = xshow.responseXML;
355 var body = document.getElementById("body");
356 var hits = xml.getElementsByTagName("hit");
360 if (!hits[0]) // We should never get here with blocking operations
362 assign_text(body, 'No records yet');
363 searchtimer = setTimeout(check_search, 250);
367 var total = Number(xml.getElementsByTagName('total')[0].childNodes[0].nodeValue);
368 var merged = Number(xml.getElementsByTagName('merged')[0].childNodes[0].nodeValue);
369 var start = Number(xml.getElementsByTagName('start')[0].childNodes[0].nodeValue);
370 var num = Number(xml.getElementsByTagName('num')[0].childNodes[0].nodeValue);
371 var clients = Number(xml.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue);
372 var pager = make_pager(merged, start,recstoshow);
373 var break_node1 = document.createElement('br');
374 var break_node2 = document.createElement('br');
375 var record_container = document.createElement('div');
376 var interval = create_element('div', 'Records : ' + (start + 1) +
377 ' to ' + (start + num) + ' of ' +
378 merged + ' (total hits: ' +
381 interval.className = 'results';
382 record_container.className = 'records';
384 body.appendChild(pager);
385 body.appendChild(interval);
386 body.appendChild(break_node1);
387 body.appendChild(break_node2);
388 body.appendChild(record_container);
390 for (i = 0; i < hits.length; i++)
392 var tn = hits[i].getElementsByTagName("md-title");
394 var an = hits[i].getElementsByTagName("md-author");
396 var cn = hits[i].getElementsByTagName("count");
398 var idn = hits[i].getElementsByTagName("recid");
401 title = tn[0].childNodes[0].nodeValue;
405 if (an[0] && an[0].childNodes[0])
406 author = an[0].childNodes[0].nodeValue;
408 count = Number(cn[0].childNodes[0].nodeValue);
409 var id = idn[0].childNodes[0].nodeValue;
411 var record_div = document.createElement('div');
412 record_div.className = 'record';
413 record_div.setAttribute('name', 'listrecord');
415 var record_cell = create_element('a', title);
416 record_cell.setAttribute('href', '#');
417 record_cell.setAttribute('onclick', 'fetch_details(' + id + '); return false');
418 record_div.appendChild(record_cell);
421 record_div.appendChild(document.createTextNode(', by '));
422 var al = create_element('a', author);
423 al.setAttribute('href', '#');
424 al.setAttribute('term', author);
425 al.onclick = function() { hyperlink_search('au', this); return false; };
426 record_div.appendChild(al);
429 record_div.appendChild(document.createTextNode(
430 ' (' + count + ')'));
431 var det_div = document.createElement('div');
433 paint_details(det_div, cur_rec);
435 det_div.style.display = 'none';
436 det_div.setAttribute('id', 'rec_' + id);
437 det_div.setAttribute('name', 'details');
438 record_div.appendChild(det_div);
439 record_container.appendChild(record_div);
446 searchtimer = setTimeout(check_search, 1000);
448 searchtimer = setTimeout(check_search, 2000);
452 termtimer = setTimeout(check_termlist, 500);
455 function check_search()
457 clearTimeout(searchtimer);
458 var url = "search.pz2?" +
460 "&start=" + document.search.startrec.value +
461 "&num=" + recstoshow +
462 "&session=" + session +
463 "&sort=" + cur_sort +
465 xshow = GetXmlHttpObject();
466 xshow.onreadystatechange=show_records;
467 xshow.open("GET", url);
472 function refine_query (obj) {
473 var term = obj.getAttribute('term');
474 var cur_termlist = obj.getAttribute('facet');
475 var query_cell = document.getElementById('query');
477 term = term.replace(/[\(\)]/g, '');
479 if (cur_termlist == 'subject')
480 query_cell.value += ' and su=(' + term + ')';
481 else if (cur_termlist == 'author')
482 query_cell.value += ' and au=(' + term + ')';
489 function show_termlist()
491 if (xtermlist.readyState != 4)
495 var xml = xtermlist.responseXML;
496 var body = facet_list[cur_facet][1];
497 var facet_name = facet_list[cur_facet][0];
498 var hits = xml.getElementsByTagName("term");
500 Number(xml.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue);
504 if (cur_facet >= facet_list.length)
509 termtimer = setTimeout(check_termlist, 500);
515 for (i = 0; i < hits.length; i++)
517 var namen = hits[i].getElementsByTagName("name");
518 var freqn = hits[i].getElementsByTagName("frequency");
520 var term = namen[0].childNodes[0].nodeValue;
521 var freq = freqn[0].childNodes[0].nodeValue;
522 var refine_cell = create_element('a', term + ' (' + freq + ')');
523 refine_cell.setAttribute('href', '#');
524 refine_cell.setAttribute('term', term);
525 refine_cell.setAttribute('facet', facet_name);
526 refine_cell.onclick = function () {
530 body.appendChild(refine_cell);
534 termtimer = setTimeout(check_termlist, 1000);
538 function check_termlist()
540 var facet_name = facet_list[cur_facet][0];
541 var url = "search.pz2?" +
543 "&session=" + session +
544 "&name=" + facet_name;
545 xtermlist = GetXmlHttpObject();
546 xtermlist.onreadystatechange=show_termlist;
547 xtermlist.open("GET", url);
548 xtermlist.send(null);
553 if (xstat.readyState != 4)
556 var xml = xstat.responseXML;
557 var body = document.getElementById("stat");
558 var nodes = xml.childNodes[0].childNodes;
560 Number(xml.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue);
563 stattimer = setTimeout(check_stat, 500);
567 assign_text(body, '(');
568 for (i = 0; i < nodes.length; i++)
570 if (nodes[i].nodeType != 1)
572 var value = nodes[i].childNodes[0].nodeValue;
575 var name = nodes[i].nodeName;
576 append_text(body, ' ' + name + '=' + value);
579 append_text(body, ')');
581 stattimer = setTimeout(check_stat, 2000);
585 function check_stat()
587 var url = "search.pz2?" +
589 "&session=" + session;
590 xstat = GetXmlHttpObject();
591 xstat.onreadystatechange=show_stat;
592 xstat.open("GET", url);
596 function search_started()
598 if (xsearch.readyState != 4)
600 var xml = xsearch.responseXML;
601 var error = xml.getElementsByTagName("error");
604 var msg = error[0].childNodes[0].nodeValue;
609 stattimer = setTimeout(check_stat, 1000);
612 function start_search()
614 clearTimeout(termtimer);
616 clearTimeout(searchtimer);
618 clearTimeout(stattimer);
620 clearTimeout(showtimer);
623 var query = escape(document.getElementById('query').value);
624 var url = "search.pz2?" +
626 "&session=" + session +
628 xsearch = GetXmlHttpObject();
629 xsearch.onreadystatechange=search_started;
630 xsearch.open("GET", url);
632 clear_cell(document.getElementById("body"));
635 document.search.startrec.value = 0;
638 function session_encode ()
643 for (i = 0; i < session_cells.length; i++)
645 var name = session_cells[i];
646 var value = escape(document.getElementById(name).value);
647 session += '&' + name + '=' + value;
654 function session_restore (session)
656 var fields = session.split(/&/);
659 for (i = 1; i < fields.length; i++)
661 var pair = fields[i].split(/=/);
662 var key = pair.shift();
663 var value = pair.join('=');
664 var cell = document.getElementById(key);
672 function session_read ()
674 var ses = window.location.hash.replace(/^#/, '');
679 function session_store (new_value)
681 window.location.hash = '#' + new_value;
685 function update_history ()
687 var session = session_encode();
688 session_store(session);
689 old_session = session;
693 function session_check ()
695 var session = session_read();
696 var action = document.search.action_type.value;
698 clearInterval(url_surveillence);
700 if ( session != unescape(old_session) )
702 session_restore(session);
704 if (action == 'search') {
706 } else if (action == 'page') {
709 alert('Unregocnized action_type: ' + action);
714 url_surveillence = setInterval(session_check, 200);
718 function get_available_facets () {
719 var facet_container = document.getElementById('termlists');
720 var facet_cells = facet_container.childNodes;
721 var facets = Array();
724 for (i = 0; i < facet_cells.length; i++) {
725 var cell = facet_cells.item(i);
727 if (cell.className == 'facet') {
728 var facet_name = cell.id.replace(/^facet_([^_]+)_terms$/, "$1");
729 facets.push(Array(facet_name, cell));
737 function get_facet_container (obj) {
738 return document.getElementById(obj.id + '_terms');
742 function toggle_facet (obj) {
743 var container = get_facet_container(obj);
745 if (obj.className == 'selected') {
746 obj.className = 'unselected';
747 container.style.display = 'inline';
749 obj.className = 'selected';
750 container.style.display = 'none';