1 /* $Id: search.js,v 1.29 2007-01-16 18:19:50 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 var msg = error[0].childNodes[0].nodeValue;
104 setTimeout(ping_session, 50000);
107 function update_action (new_action) {
108 document.search.action_type.value = new_action;
112 function make_pager (hits, offset, max) {
115 var start_offset = offset - page_window * max;
116 var div_elem = document.createElement('div');
118 div_elem.className = 'pages';
120 if (start_offset < 0) {
124 for (off = start_offset;
125 off < hits && off < (start_offset + 2 * page_window * max);
128 var p = off / max + 1;
129 var page_elem = create_element('a', p);
130 var newline_node = document.createTextNode(' ');
132 if ((offset >= off) && (offset < (off + max))) {
133 page_elem.className = 'select';
136 page_elem.setAttribute('off', off);
137 page_elem.style.cursor = 'pointer';
138 page_elem.onclick = function () {
139 update_offset(this.getAttribute('off'));
142 div_elem.appendChild(page_elem);
143 div_elem.appendChild(newline_node);
150 function update_offset (offset) {
151 clearTimeout(searchtimer);
152 document.search.startrec.value = offset;
153 update_action('page');
160 function create_element (name, cdata) {
161 var elem_node = document.createElement(name);
162 var text_node = document.createTextNode(cdata);
163 elem_node.appendChild(text_node);
169 function clear_cell (cell) {
170 while (cell.hasChildNodes())
171 cell.removeChild(cell.firstChild);
175 function append_text(cell, text) {
176 text_node = document.createTextNode(text);
177 cell.appendChild(text_node);
181 function assign_text (cell, text) {
183 append_text(cell, text);
186 function set_sort_opt(n, opt, str)
188 var txt = document.createTextNode(str);
193 var a = document.createElement('a');
195 a.setAttribute('href', "");
196 a.setAttribute('onclick', "set_sort('" + opt + "'); return false");
201 function set_sort(sort)
203 if (sort && sort != cur_sort)
210 var t = document.getElementById("sortselect");
212 t.appendChild(document.createTextNode("Sort results by: "));
213 set_sort_opt(t, 'relevance', 'Relevance');
214 t.appendChild(document.createTextNode(" or "));
215 set_sort_opt(t, 'title:1', 'Title');
218 function displayname(name)
220 if (name == 'md-author')
222 else if (name == 'md-subject')
224 else if (name == 'md-date')
226 else if (name == 'md-isbn')
228 else if (name == 'md-publisher')
234 function paint_details(body, xml)
237 //body.appendChild(document.createElement('br'));
238 var nodes = xml.childNodes[0].childNodes;
240 var table = document.createElement('table');
241 table.setAttribute('cellpadding', 2);
242 for (i = 0; i < nodes.length; i++)
244 if (nodes[i].nodeType != 1)
246 var name = nodes[i].nodeName;
247 if (name == 'recid' || name == 'md-title')
249 name = displayname(name);
250 if (!nodes[i].childNodes[0])
252 var value = nodes[i].childNodes[0].nodeValue;
253 var lbl = create_element('b', name );
254 var lbln = document.createElement('td');
255 lbln.setAttribute('width', 70);
256 lbln.appendChild(lbl);
257 var val = create_element('td', value);
258 var tr = document.createElement('tr');
259 tr.appendChild(lbln);
261 table.appendChild(tr);
263 body.appendChild(table);
264 body.style.display = 'inline';
267 function show_details()
269 if (xfetchDetails.readyState != 4)
271 var xml = xfetchDetails.responseXML;
272 var error = xml.getElementsByTagName("error");
275 var msg = error[0].childNodes[0].nodeValue;
281 // This is some ugly display code. Replace with your own ting o'beauty
283 var idn = xml.getElementsByTagName('recid');
286 var id = idn[0].childNodes[0].nodeValue;
290 var body = document.getElementById('rec_' + id);
293 paint_details(body, xml);
296 function hyperlink_search(field, obj)
298 var term = obj.getAttribute('term');
299 var queryfield = document.getElementById('query');
300 queryfield.value = field + '=' + term;
304 function fetch_details(id)
307 var nodes = document.getElementsByName('listrecord');
309 for (i = 0; i < nodes.length; i++)
311 var dets = nodes[i].getElementsByTagName('div');
313 dets[0].style.display = 'none';
322 var url = "search.pz2?session=" + session +
325 SendXmlHttpObject(xfetchDetails = GetXmlHttpObject(), url, show_details);
328 function show_records()
330 if (xshow.readyState != 4)
333 var xml = xshow.responseXML;
334 var body = document.getElementById("body");
335 var hits = xml.getElementsByTagName("hit");
339 if (!hits[0]) // We should never get here with blocking operations
341 assign_text(body, 'No records yet');
342 searchtimer = setTimeout(check_search, 250);
346 var total = Number(xml.getElementsByTagName('total')[0].childNodes[0].nodeValue);
347 var merged = Number(xml.getElementsByTagName('merged')[0].childNodes[0].nodeValue);
348 var start = Number(xml.getElementsByTagName('start')[0].childNodes[0].nodeValue);
349 var num = Number(xml.getElementsByTagName('num')[0].childNodes[0].nodeValue);
350 var clients = Number(xml.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue);
351 var pager = make_pager(merged, start,recstoshow);
352 var break_node1 = document.createElement('br');
353 var break_node2 = document.createElement('br');
354 var record_container = document.createElement('div');
355 var interval = create_element('div', 'Records : ' + (start + 1) +
356 ' to ' + (start + num) + ' of ' +
357 merged + ' (total hits: ' +
360 interval.className = 'results';
361 record_container.className = 'records';
363 body.appendChild(pager);
364 body.appendChild(interval);
365 body.appendChild(break_node1);
366 body.appendChild(break_node2);
367 body.appendChild(record_container);
369 for (i = 0; i < hits.length; i++)
371 var tn = hits[i].getElementsByTagName("md-title");
373 var an = hits[i].getElementsByTagName("md-author");
375 var cn = hits[i].getElementsByTagName("count");
377 var idn = hits[i].getElementsByTagName("recid");
380 title = tn[0].childNodes[0].nodeValue;
384 if (an[0] && an[0].childNodes[0])
385 author = an[0].childNodes[0].nodeValue;
387 count = Number(cn[0].childNodes[0].nodeValue);
388 var id = idn[0].childNodes[0].nodeValue;
390 var record_div = document.createElement('div');
391 record_div.className = 'record';
392 record_div.setAttribute('name', 'listrecord');
394 var record_cell = create_element('a', title);
395 record_cell.setAttribute('href', '#');
396 record_cell.setAttribute('onclick', 'fetch_details(' + id + '); return false');
397 record_div.appendChild(record_cell);
400 record_div.appendChild(document.createTextNode(', by '));
401 var al = create_element('a', author);
402 al.setAttribute('href', '#');
403 al.setAttribute('term', author);
404 al.onclick = function() { hyperlink_search('au', this); return false; };
405 record_div.appendChild(al);
408 record_div.appendChild(document.createTextNode(
409 ' (' + count + ')'));
410 var det_div = document.createElement('div');
412 paint_details(det_div, cur_rec);
414 det_div.style.display = 'none';
415 det_div.setAttribute('id', 'rec_' + id);
416 det_div.setAttribute('name', 'details');
417 record_div.appendChild(det_div);
418 record_container.appendChild(record_div);
425 searchtimer = setTimeout(check_search, 1000);
427 searchtimer = setTimeout(check_search, 2000);
431 termtimer = setTimeout(check_termlist, 500);
434 function check_search()
436 clearTimeout(searchtimer);
437 var url = "search.pz2?" +
439 "&start=" + document.search.startrec.value +
440 "&num=" + recstoshow +
441 "&session=" + session +
442 "&sort=" + cur_sort +
444 xshow = GetXmlHttpObject();
445 xshow.onreadystatechange=show_records;
446 xshow.open("GET", url);
451 function refine_query (obj) {
452 var term = obj.getAttribute('term');
453 var cur_termlist = obj.getAttribute('facet');
454 var query_cell = document.getElementById('query');
456 term = term.replace(/[\(\)]/g, '');
458 if (cur_termlist == 'subject')
459 query_cell.value += ' and su=(' + term + ')';
460 else if (cur_termlist == 'author')
461 query_cell.value += ' and au=(' + term + ')';
468 function show_termlist()
470 if (xtermlist.readyState != 4)
474 var xml = xtermlist.responseXML;
475 var body = facet_list[cur_facet][1];
476 var facet_name = facet_list[cur_facet][0];
477 var hits = xml.getElementsByTagName("term");
479 Number(xml.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue);
483 if (cur_facet >= facet_list.length)
488 termtimer = setTimeout(check_termlist, 500);
494 for (i = 0; i < hits.length; i++)
496 var namen = hits[i].getElementsByTagName("name");
497 var freqn = hits[i].getElementsByTagName("frequency");
499 var term = namen[0].childNodes[0].nodeValue;
500 var freq = freqn[0].childNodes[0].nodeValue;
501 var refine_cell = create_element('a', term + ' (' + freq + ')');
502 refine_cell.setAttribute('href', '#');
503 refine_cell.setAttribute('term', term);
504 refine_cell.setAttribute('facet', facet_name);
505 refine_cell.onclick = function () {
509 body.appendChild(refine_cell);
513 termtimer = setTimeout(check_termlist, 1000);
517 function check_termlist()
519 var facet_name = facet_list[cur_facet][0];
520 var url = "search.pz2?" +
522 "&session=" + session +
523 "&name=" + facet_name;
524 xtermlist = GetXmlHttpObject();
525 xtermlist.onreadystatechange=show_termlist;
526 xtermlist.open("GET", url);
527 xtermlist.send(null);
532 if (xstat.readyState != 4)
535 var xml = xstat.responseXML;
536 var body = document.getElementById("stat");
537 var nodes = xml.childNodes[0].childNodes;
539 Number(xml.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue);
542 stattimer = setTimeout(check_stat, 500);
546 assign_text(body, '(');
547 for (i = 0; i < nodes.length; i++)
549 if (nodes[i].nodeType != 1)
551 var value = nodes[i].childNodes[0].nodeValue;
554 var name = nodes[i].nodeName;
555 append_text(body, ' ' + name + '=' + value);
558 append_text(body, ')');
560 stattimer = setTimeout(check_stat, 2000);
564 function check_stat()
566 var url = "search.pz2?" +
568 "&session=" + session;
569 xstat = GetXmlHttpObject();
570 xstat.onreadystatechange=show_stat;
571 xstat.open("GET", url);
575 function search_started()
577 if (xsearch.readyState != 4)
579 var xml = xsearch.responseXML;
580 var error = xml.getElementsByTagName("error");
583 var msg = error[0].childNodes[0].nodeValue;
588 stattimer = setTimeout(check_stat, 1000);
591 function start_search()
593 clearTimeout(termtimer);
595 clearTimeout(searchtimer);
597 clearTimeout(stattimer);
599 clearTimeout(showtimer);
602 var query = escape(document.getElementById('query').value);
603 var url = "search.pz2?" +
605 "&session=" + session +
607 xsearch = GetXmlHttpObject();
608 xsearch.onreadystatechange=search_started;
609 xsearch.open("GET", url);
611 clear_cell(document.getElementById("body"));
614 document.search.startrec.value = 0;
617 function session_encode ()
622 for (i = 0; i < session_cells.length; i++)
624 var name = session_cells[i];
625 var value = escape(document.getElementById(name).value);
626 session += '&' + name + '=' + value;
633 function session_restore (session)
635 var fields = session.split(/&/);
638 for (i = 1; i < fields.length; i++)
640 var pair = fields[i].split(/=/);
641 var key = pair.shift();
642 var value = pair.join('=');
643 var cell = document.getElementById(key);
651 function session_read ()
653 var ses = window.location.hash.replace(/^#/, '');
658 function session_store (new_value)
660 window.location.hash = '#' + new_value;
664 function update_history ()
666 var session = session_encode();
667 session_store(session);
668 old_session = session;
672 function session_check ()
674 var session = session_read();
675 var action = document.search.action_type.value;
677 clearInterval(url_surveillence);
679 if ( session != unescape(old_session) )
681 session_restore(session);
683 if (action == 'search') {
685 } else if (action == 'page') {
688 alert('Unregocnized action_type: ' + action);
693 url_surveillence = setInterval(session_check, 200);
697 function get_available_facets () {
698 var facet_container = document.getElementById('termlists');
699 var facet_cells = facet_container.childNodes;
700 var facets = Array();
703 for (i = 0; i < facet_cells.length; i++) {
704 var cell = facet_cells.item(i);
706 if (cell.className == 'facet') {
707 var facet_name = cell.id.replace(/^facet_([^_]+)_terms$/, "$1");
708 facets.push(Array(facet_name, cell));
716 function get_facet_container (obj) {
717 return document.getElementById(obj.id + '_terms');
721 function toggle_facet (obj) {
722 var container = get_facet_container(obj);
724 if (obj.className == 'selected') {
725 obj.className = 'unselected';
726 container.style.display = 'inline';
728 obj.className = 'selected';
729 container.style.display = 'none';