1: # The LearningOnline Network with CAPA
2: # Navigate Maps Handler
3: #
4: # $Id: lonnavdisplay.pm,v 1.13.6.2 2010/10/04 21:46:32 raeburn Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: ###
29:
30: package Apache::lonnavdisplay;
31:
32: use strict;
33: use Apache::Constants qw(:common :http);
34: use Apache::lonmenu();
35: use Apache::loncommon();
36: use Apache::lonnavmaps();
37: use Apache::lonhtmlcommon();
38: use Apache::lonnet;
39: use Apache::lonlocal;
40: use Time::HiRes qw( gettimeofday tv_interval );
41:
42: sub handler {
43: my $r = shift;
44: real_handler($r);
45: }
46:
47: sub real_handler {
48: my $r = shift;
49: #my $t0=[&gettimeofday()];
50: # Handle header-only request
51: if ($r->header_only) {
52: if ($env{'browser.mathml'}) {
53: &Apache::loncommon::content_type($r,'text/xml');
54: } else {
55: &Apache::loncommon::content_type($r,'text/html');
56: }
57: $r->send_http_header;
58: return OK;
59: }
60:
61: # Send header, don't cache this page
62: if ($env{'browser.mathml'}) {
63: &Apache::loncommon::content_type($r,'text/xml');
64: } else {
65: &Apache::loncommon::content_type($r,'text/html');
66: }
67: &Apache::loncommon::no_cache($r);
68:
69: my %toplinkitems=();
70: &Apache::lonnavmaps::add_linkitem(\%toplinkitems,'blank','',
71: "Select Action");
72: if ($ENV{QUERY_STRING} eq 'collapseExternal') {
73: &Apache::lonnet::put('environment',{'remotenavmap' => 'off'});
74: &Apache::lonnet::appenv({'environment.remotenavmap' => 'off'});
75: my $menu=&Apache::lonmenu::reopenmenu();
76: my $navstatus=&Apache::lonmenu::get_nav_status();
77: if ($menu) {
78: $menu=(<<MENU)
79: swmenu=$menu
80: swmenu.clearTimeout(swmenu.menucltim);
81: $navstatus
82: MENU
83: } else {
84: my $nothing = &Apache::lonhtmlcommon::javascript_nothing();
85: my $mainwindow='window.open('.$nothing.',"loncapaclient","",false);';
86: $menu=(<<MENU)
87: swmenu=$mainwindow
88: $navstatus
89: MENU
90: }
91: $r->send_http_header;
92: my $js =<<"ENDSUBM";
93: <script type="text/javascript">
94: function submitthis() {
95: $menu
96: self.close();
97: }
98:
99: </script>
100: ENDSUBM
101: $r->print(&Apache::loncommon::start_page(undef,$js,
102: {'only_body' => 1,
103: 'bgcolor' => '#FFFFFF',
104: 'add_entries' =>
105: {'onload' =>
106: "submitthis()"}}).
107: &Apache::loncommon::end_page());
108:
109: return OK;
110: }
111: if ($ENV{QUERY_STRING} =~ /^launchExternal/) {
112: &Apache::lonnet::put('environment',{'remotenavmap' => 'on'});
113: &Apache::lonnet::appenv({'environment.remotenavmap' => 'on'});
114: my $menu=&Apache::lonmenu::reopenmenu();
115: my $navstatus=&Apache::lonmenu::get_nav_status();
116: if ($menu) {
117: $r->print(<<MENU);
118: <script type="text/javascript">
119: swmenu=$menu
120: swmenu.clearTimeout(swmenu.menucltim);
121: $navstatus
122: </script>
123: MENU
124: }
125: }
126: if ($ENV{QUERY_STRING} eq 'turningOffExternal') {
127: $env{'environment.remotenavmap'}='off';
128: }
129:
130: # Create the nav map
131: my $navmap = Apache::lonnavmaps::navmap->new();
132:
133: if (!defined($navmap)) {
134: my $requrl = $r->uri;
135: $env{'user.error.msg'} = "$requrl:bre:0:0:Course not initialized";
136: $env{'user.reinit'} = 1;
137: return HTTP_NOT_ACCEPTABLE;
138: }
139: $r->send_http_header;
140:
141: # ------------------------------------------------------------ Get query string
142: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['sort','showOnlyHomework','postsymb','register']);
143:
144: # ----------------------------------------------------- Force menu registration
145: my $body_only='';
146: my $js;
147: if ($env{'environment.remotenavmap'} eq 'on') {
148: $js='<script type="text/javascript">
149: function collapse() {
150: this.document.location="/adm/navmaps?collapseExternal";
151: }
152: </script>';
153: $body_only=1;
154: }
155:
156: # Header
157: my $course_type = &Apache::loncommon::course_type();
158: my ($title,$breadcrumb_text,$start_page,$args);
159: if ($course_type eq 'Community') {
160: $title = 'Community Contents';
161: $breadcrumb_text = &mt('Community Contents');
162: } else {
163: $title = 'Course Contents';
164: $breadcrumb_text = &mt('Course Contents');
165: }
166: if ($env{'form.register'}) {
167: $args = {'force_register' => $env{'form.register'},
168: 'only_body' => $body_only};
169: $start_page = &Apache::loncommon::start_page($title,$js,$args);
170: } else {
171: my $brcrum = [{href => '/adm/navmaps',
172: text => $breadcrumb_text,
173: no_mt => 1},
174: ];
175: $args = {'bread_crumbs' => $brcrum,
176: 'only_body' => $body_only};
177: $start_page = &Apache::loncommon::start_page($title,$js,$args);
178: }
179: $r->print($start_page.
180: '<script type="text/javascript">window.focus();</script>');
181:
182: $r->rflush();
183:
184: # Check that it's defined
185: if (!($navmap->courseMapDefined())) {
186: $r->print(&Apache::loncommon::help_open_menu('Navigation Screen','Navigation_Screen',undef,'RAT'));
187: $r->print('<span class="LC_error">'.&mt('Coursemap undefined.').
188: '</span>' .
189: &Apache::loncommon::end_page());
190: return OK;
191: }
192:
193: # See if there's only one map in the top-level, if we don't
194: # already have a filter... if so, automatically display it
195: # (older code; should use retrieveResources)
196: if ($ENV{QUERY_STRING} !~ /filter/) {
197: my $iterator = $navmap->getIterator(undef, undef, undef, 0);
198: my $curRes;
199: my $sequenceCount = 0;
200: my $sequenceId;
201: while ($curRes = $iterator->next()) {
202: if (ref($curRes) && $curRes->is_sequence()) {
203: $sequenceCount++;
204: $sequenceId = $curRes->map_pc();
205: }
206: }
207:
208: if ($sequenceCount == 1) {
209: # The automatic iterator creation in the render call
210: # will pick this up. We know the condition because
211: # the defined($env{'form.filter'}) also ensures this
212: # is a fresh call.
213: $env{'form.filter'} = "$sequenceId";
214: }
215: }
216:
217: if ($ENV{QUERY_STRING} eq 'launchExternal') {
218: $r->print('
219: <form name="returnwin" action="/adm/flip?postdata=navlaunch%3a"
220: method="post" target="loncapaclient">
221: </form>');
222: $r->print('
223: <script type="text/javascript">
224: this.document.returnwin.submit();
225: </script>');
226: }
227:
228: if ($env{'environment.remotenavmap'} ne 'on') {
229: $r->print(&launch_win('link','yes',\%toplinkitems));
230: }
231: if ($env{'environment.remotenavmap'} eq 'on') {
232: &Apache::lonnavmaps::add_linkitem(\%toplinkitems,'closenav',
233: 'collapse()',
234: "Close navigation window");
235: }
236:
237:
238: # Check to see if the student is jumping to next open, do-able problem
239: if ($ENV{QUERY_STRING} =~ /^jumpToFirstHomework/) {
240: # Find the next homework problem that they can do.
241: my $iterator = $navmap->getIterator(undef, undef, undef, 1);
242: my $curRes;
243: my $foundDoableProblem = 0;
244: my $minimumduedate;
245: my $now = time();
246:
247: while ($curRes = $iterator->next()) {
248: if (ref($curRes) && $curRes->is_problem()) {
249: my $status = $curRes->status();
250: my $thisduedate=$curRes->duedate();
251: if ($thisduedate > $now
252: && $curRes->completable()) {
253:
254: $foundDoableProblem = 1;
255:
256: if (!defined($minimumduedate)
257: || $thisduedate<$minimumduedate) {
258: # Pop open all previous maps
259: my $stack = $iterator->getStack();
260: pop @$stack; # last resource in the stack is the problem
261: # itself, which we don't need in the map stack
262: my @mapPcs = map {$_->map_pc()} @$stack;
263: $env{'form.filter'} = join(',', @mapPcs);
264:
265: # Mark as both "here" and "jump"
266: $env{'form.postsymb'} = $curRes->symb();
267: $minimumduedate=$thisduedate;
268: }
269: }
270: }
271: }
272:
273: # If we found no problems, print a note to that effect.
274: if (!$foundDoableProblem) {
275: $r->print("<span class=\"LC_info\">"
276: .&mt("All homework assignments have been completed.")
277: ."</span>");
278: }
279: } else {
280: my $link = 'navmaps?jumpToFirstHomework';
281: if ($env{'form.register'}) {
282: $link .= '&register='.$env{'form.register'};
283: }
284: &Apache::lonnavmaps::add_linkitem(\%toplinkitems,'firsthomework',
285: 'location.href="'.$link.'"',
286: "Show my first due problem");
287: }
288:
289: my $suppressEmptySequences = 0;
290: my $filterFunc = undef;
291: my $resource_no_folder_link = 0;
292:
293: # Display only due homework.
294: my $showOnlyHomework = 0;
295: if ($env{'form.showOnlyHomework'} eq "1") {
296: $showOnlyHomework = 1;
297: $suppressEmptySequences = 1;
298: $filterFunc = sub { my $res = shift;
299: return $res->completable() || $res->is_map();
300: };
301: my $link = 'navmaps?sort='.$env{'form.sort'};
302: if ($env{'form.register'}) {
303: $link .= '&register='.$env{'form.register'};
304: }
305: &Apache::lonnavmaps::add_linkitem(\%toplinkitems,'everything',
306: 'location.href="'.$link.'"',
307: "Show everything");
308: $r->print("<span class=\"LC_info\">".&mt("Uncompleted Problems")."</span>");
309: $env{'form.filter'} = '';
310: $env{'form.condition'} = 1;
311: $resource_no_folder_link = 1;
312: } else {
313: my $link = 'navmaps?sort='.$env{'form.sort'}.'&showOnlyHomework=1';
314: if ($env{'form.register'}) {
315: $link .= '&register='.$env{'form.register'};
316: }
317: &Apache::lonnavmaps::add_linkitem(\%toplinkitems,'uncompleted',
318: 'location.href="'.$link.'"',
319: "Show only uncompleted problems");
320: }
321:
322: my %selected=($env{'form.sort'} => ' selected="selected"');
323: my $sort_html=('<form name="sortForm" action="">
324: <span class="LC_nobreak">
325: <input type="hidden" name="showOnlyHomework" value="'.$env{'form.showOnlyHomework'}.'" />
326: '.&mt('Sort by:').'
327: <select name="sort" onchange="document.sortForm.submit()">
328: <option value="default"'.$selected{'default'}.'>'.&mt('Default').'</option>
329: <option value="title"'.$selected{'title'}.'>'.&mt('Title').'</option>
330: <option value="duedate"'.$selected{'duedate'}.'>'.&mt('Duedate').'</option>
331: <option value="discussion"'.$selected{'discussion'}.'>'.&mt('Has New Discussion').'</option>
332: </select>
333: <input type="hidden" name="register" value="'.$env{'form.register'}.'" />
334: </span>
335: </form>');
336: # renderer call
337: my $renderArgs = { 'cols' => [0,1,2,3],
338: 'sort' => $env{'form.sort'},
339: 'url' => '/adm/navmaps',
340: 'navmap' => $navmap,
341: 'suppressNavmap' => 1,
342: 'suppressEmptySequences' => $suppressEmptySequences,
343: 'filterFunc' => $filterFunc,
344: 'resource_no_folder_link' => $resource_no_folder_link,
345: 'sort_html'=> $sort_html,
346: 'r' => $r,
347: 'caller' => 'navmapsdisplay',
348: 'linkitems' => \%toplinkitems};
349: my $render = &Apache::lonnavmaps::render($renderArgs);
350:
351: # If no resources were printed, print a reassuring message so the
352: # user knows there was no error.
353: if ($renderArgs->{'counter'} == 0) {
354: if ($showOnlyHomework) {
355: $r->print("<p><span class=\"LC_info\">".&mt("All homework is currently completed.")."</span></p>");
356: } else { # both jumpToFirstHomework and normal use the same: course must be empty
357: $r->print("<p><span class=\"LC_info\">".&mt("This course is empty.")."</span></p>");
358: }
359: }
360: #my $td=&tv_interval($t0);
361: #$r->print("<br />$td");
362:
363: $r->print(&Apache::loncommon::end_page());
364: $r->rflush();
365:
366: return OK;
367: }
368:
369: sub launch_win {
370: my ($mode,$script,$toplinkitems,$firsttime)=@_;
371: my $result;
372: if ($script ne 'no') {
373: $result.='<script type="text/javascript">';
374: }
375: if ($firsttime) {
376: $result.='function launch_navmapwin() {
377: newWindow=open(\'/adm/navmaps?launchExternalRoles\',\'loncapanav\',\'width=400,height=600,scrollbars=1\');
378: }';
379: } else {
380: $result.='function launch_navmapwin() {
381: newWindow=open(\'/adm/navmaps?launchExternal\',\'loncapanav\',\'width=400,height=600,scrollbars=1\');
382: }';
383: }
384: if ($mode eq 'now') {
385: $result.="\nlaunch_navmapwin();\n";
386: }
387: if ($script ne 'no') {
388: $result.='</script>';
389: }
390: if ($mode eq 'link') {
391: &Apache::lonnavmaps::add_linkitem($toplinkitems,'launchnav',
392: 'launch_navmapwin()',
393: "Launch navigation window");
394: }
395: return $result;
396: }
397:
398: 1;
399: __END__
400:
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