Annotation of loncom/interface/spreadsheet/lonspreadsheet.pm, revision 1.10
1.1 matthew 1: #
1.10 ! matthew 2: # $Id: lonspreadsheet.pm,v 1.9 2003/06/16 13:51:46 www Exp $
1.1 matthew 3: #
4: # Copyright Michigan State University Board of Trustees
5: #
6: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
7: #
8: # LON-CAPA is free software; you can redistribute it and/or modify
9: # it under the terms of the GNU General Public License as published by
10: # the Free Software Foundation; either version 2 of the License, or
11: # (at your option) any later version.
12: #
13: # LON-CAPA is distributed in the hope that it will be useful,
14: # but WITHOUT ANY WARRANTY; without even the implied warranty of
15: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16: # GNU General Public License for more details.
17: #
18: # You should have received a copy of the GNU General Public License
19: # along with LON-CAPA; if not, write to the Free Software
20: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21: #
22: # /home/httpd/html/adm/gpl.txt
23: #
24: # http://www.lon-capa.org/
25: #
26: # The LearningOnline Network with CAPA
27: # Spreadsheet/Grades Display Handler
28: #
29: # POD required stuff:
30:
31: =head1 NAME
32:
33: lonspreadsheet
34:
35: =head1 SYNOPSIS
36:
37: Spreadsheet interface to internal LON-CAPA data
38:
39: =head1 DESCRIPTION
40:
41: Lonspreadsheet provides course coordinators the ability to manage their
42: students grades online. The students are able to view their own grades, but
43: not the grades of their peers. The spreadsheet is highly customizable,
44: offering the ability to use Perl code to manipulate data, as well as many
45: built-in functions.
46:
47: =head2 Functions available to user of lonspreadsheet
48:
49: =over 4
50:
51: =cut
52:
53:
54: package Apache::lonspreadsheet;
55:
56: use strict;
57: use Apache::classcalc();
58: use Apache::studentcalc();
59: use Apache::assesscalc();
60: use Apache::Constants qw(:common :http);
61: use Apache::lonnet;
62: use Apache::lonhtmlcommon;
63: use HTML::Entities();
64:
65: ##
66: ## HTML utility subroutines really should go in lonhtmlcommon
67: ##
68:
69: sub textfield {
70: my ($title,$name,$value)=@_;
71: return "\n<p><b>$title:</b><br>".
72: '<input type=text name="'.$name.'" size=80 value="'.$value.'">';
73: }
74:
75: sub hiddenfield {
76: my ($name,$value)=@_;
77: return '<input type=hidden name="'.$name.'" value="'.$value.'" />'."\n";
78: }
79:
80: sub selectbox {
81: my ($title,$name,$value,%options)=@_;
82: my $selout="\n<p><b>$title:</b><br>".'<select name="'.$name.'">';
83: foreach (sort keys(%options)) {
84: $selout.='<option value="'.$_.'"';
85: if ($_ eq $value) { $selout.=' selected'; }
86: $selout.='>'.$options{$_}.'</option>';
87: }
88: return $selout.'</select>';
89: }
90:
1.5 matthew 91: sub file_dialogs {
92: my ($spreadsheet) = @_;
93: my $bgcolor = "#FFFFFF";
94: my $sheettype = $spreadsheet->{'type'};
95: my $result = '';
96: ##
97: ## Deal with saving the spreadsheet
98: if (exists($ENV{'form.save'}) &&
99: exists($ENV{'form.savefilename'})) {
100: $spreadsheet->filename($ENV{'form.savefilename'});
101: my $save_status = $spreadsheet->save();
102: if ($save_status ne 'ok') {
103: $result .= "An error occurred while saving the spreadsheet".
104: "There error is:".$save_status;
105: return $result;
106: } else {
107: $result .= "Spreadsheet saved as ".$ENV{'form.savefilename'};
108: }
109: } elsif (exists($ENV{'form.newformula'}) &&
110: exists($ENV{'form.cell'}) &&
111: $ENV{'form.cell'} ne '' ) {
112: ##
113: ## Make any requested modifications to the spreadsheet
114: $spreadsheet->modify_cell($ENV{'form.cell'},
115: $ENV{'form.newformula'});
116: $spreadsheet->save_tmp();
117: # output that we are dealing with a temporary file
118: $result .=&hiddenfield('workcopy',$sheettype);
119: $result .='<pre>'.$ENV{'form.cell'}.' = '.
120: $ENV{'form.newformula'}."</pre>\n";
121: }
122: ##
123: ## Editing code
124: $result .=&hiddenfield('cell','').
125: &hiddenfield('newformula','');
126: ##
127: ## Create the save and load dialogs
128: my $filename = $spreadsheet->filename();
1.10 ! matthew 129: my $truefilename = $filename;
! 130: if ($spreadsheet->is_default()) {
! 131: $filename = 'Default';
! 132: }
1.5 matthew 133: my $save_dialog = '<nobr>'.
134: '<input type="submit" name="save" value="Save as" /> '.
135: '<input type="text" name="savefilename" size="30" value="'.
1.10 ! matthew 136: $truefilename.'" />'.
1.5 matthew 137: '</nobr>';
138: my $makedefault_dialog = '<input type="submit" name="makedefault" '.
139: 'value="Make This Sheet the Default"/>';
140: #
141: my $link = '<a href="javascript:openbrowser'.
1.9 www 142: "('sheet','loadfilename','spreadsheet')\">Select Spreadsheet File</a>";
1.5 matthew 143: my $load_dialog = <<END;
144: <table bgcolor="$bgcolor">
145: <tr><td><input type="submit" name="load" value="Load" /></td>
146: <td><nobr>
1.10 ! matthew 147: <input type="text" name="loadfilename" size="20" value="$filename" />
1.5 matthew 148: $link</nobr>
149: </td></tr>
150: <tr><td> </td><td>
151: <select name="fileselect" onchange="document.sheet.loadfilename.value=document.sheet.fileselect.value" >
152: END
1.7 matthew 153: my $default_filename_set = 0;
1.5 matthew 154: foreach my $sheetfilename ($spreadsheet->othersheets()) {
155: $load_dialog .= ' <option name="'.$sheetfilename.'"';
156: if ($filename eq $sheetfilename) {
157: $load_dialog .= ' selected';
1.7 matthew 158: $default_filename_set = 1;
1.5 matthew 159: }
160: $load_dialog .= '>'.$sheetfilename."</option>\n";
161: }
162: $load_dialog .= "</td><td> </td></tr>\n</table>\n";
163: #
164: $result .=<<END;
165: <!-- load / save dialogs -->
166: <table cellspacing="2">
167: <tr>
168: <td>$load_dialog</td>
169: <td>
170: <table bgcolor="$bgcolor">
171: <tr><td>$save_dialog</td></tr>
172: <tr><td align="center">$makedefault_dialog</td></tr>
173: </table>
174: </td>
175: </tr>
176: </table>
177: END
178: return $result;
179: }
180:
1.1 matthew 181: sub handler {
182: my $r=shift;
183: #
184: # Overload checking
185: #
186: # Check this server
187: my $loaderror=&Apache::lonnet::overloaderror($r);
188: if ($loaderror) { return $loaderror; }
189: # Check the course homeserver
190: $loaderror= &Apache::lonnet::overloaderror($r,
191: $ENV{'course.'.$ENV{'request.course.id'}.'.home'});
1.4 matthew 192: # if ($loaderror) { return $loaderror; }
1.1 matthew 193: #
194: # HTML Header
195: #
196: if ($r->header_only) {
197: $r->content_type('text/html');
198: $r->send_http_header;
199: return OK;
200: }
201: #
202: # Roles Checking
203: #
204: # Needs to be in a course
205: if (! $ENV{'request.course.fn'}) {
206: # Not in a course, or not allowed to modify parms
207: $ENV{'user.error.msg'}=
208: $r->uri.":opa:0:0:Cannot modify spreadsheet";
209: return HTTP_NOT_ACCEPTABLE;
210: }
211: #
212: # Get query string for limited number of parameters
213: #
214: &Apache::loncommon::get_unprocessed_cgi
215: ($ENV{'QUERY_STRING'},['sname','sdomain','usymb','filename']);
216: #
217: # Deal with restricted student permissions
218: #
219: if ($ENV{'request.role'} =~ /^st\./) {
220: delete $ENV{'form.cell'} if (exists($ENV{'form.cell'}));
221: delete $ENV{'form.newformula'} if (exists($ENV{'form.newformula'}));
222: }
223: #
224: # Determine basic information about the spreadsheet
225: my ($sheettype) = ($r->uri=~/\/(\w+)$/);
226: #
227: my $symb = undef;
228: $symb = $ENV{'form.usymb'} if (exists($ENV{'form.usymb'}));
229: my $name = $ENV{'user.name'};
230: my $domain = $ENV{'user.domain'};
231: if (exists($ENV{'form.sname'})) {
232: $name = $ENV{'form.sname'};
233: $domain = $ENV{'form.sdomain'};
234: }
235: #
236: # Open page, try to prevent browser cache.
237: #
238: $r->content_type('text/html');
239: $r->header_out('Cache-control','no-cache');
240: $r->header_out('Pragma','no-cache');
241: $r->send_http_header;
1.3 matthew 242: ##
243: ## Check permissions
244: my $allowed_to_edit = &Apache::lonnet::allowed('mgr',
245: $ENV{'request.course.id'});
246: my $allowed_to_view = &Apache::lonnet::allowed('vgr',
247: $ENV{'request.course.id'});
1.5 matthew 248:
1.1 matthew 249: #
1.3 matthew 250: # Only those able to view others grades will be allowed to continue
251: # if they are not requesting their own.
1.1 matthew 252: if (($sheettype eq 'classcalc') ||
253: ($name ne $ENV{'user.name'} ) ||
254: ($domain ne $ENV{'user.domain'})) {
1.3 matthew 255: if (! $allowed_to_view) {
1.1 matthew 256: $r->print('<h1>Access Permission Denied</h1>'.
257: '</form></body></html>');
258: return OK;
259: }
260: }
261: #
262: # Header....
263: #
264: $r->print('<html><head><title>LON-CAPA Spreadsheet</title>');
265: my $nothing = &Apache::lonhtmlcommon::javascript_nothing();
266: ##
267: ## Spit out the javascript required for editing
268: ##
1.5 matthew 269: if ($allowed_to_edit) {
270: my $extra_javascript =
271: &Apache::loncommon::browser_and_searcher_javascript();
1.1 matthew 272: $r->print(<<ENDSCRIPT);
273: <script language="JavaScript">
274:
1.5 matthew 275: $extra_javascript
276:
1.1 matthew 277: var editwin;
278:
279: function celledit(cellname,cellformula) {
280: var edit_text = '';
281: // cellformula may contain less-than and greater-than symbols, so
282: // we need to escape them?
283: edit_text +='<html><head><title>Cell Edit Window</title></head><body>';
284: edit_text += '<form name="editwinform">';
285: edit_text += '<center><h3>Cell '+cellname+'</h3>';
286: edit_text += '<textarea name="newformula" cols="40" rows="6"';
287: edit_text += ' wrap="off" >'+cellformula+'</textarea>';
288: edit_text += '</br>';
289: edit_text += '<input type="button" name="accept" value="Accept"';
290: edit_text += ' onClick=\\\'javascript:';
291: edit_text += 'opener.document.sheet.cell.value=';
292: edit_text += '"'+cellname+'";';
293: edit_text += 'opener.document.sheet.newformula.value=';
294: edit_text += 'document.editwinform.newformula.value;';
295: edit_text += 'opener.document.sheet.submit();';
296: edit_text += 'self.close()\\\' />';
297: edit_text += ' ';
298: edit_text += '<input type="button" name="abort" ';
299: edit_text += 'value="Discard Changes"';
300: edit_text += ' onClick="javascript:self.close()" />';
301: edit_text += '</center></body></html>';
302:
303: if (editwin != null && !(editwin.closed) ) {
304: editwin.close();
305: }
306:
307: editwin = window.open($nothing,'CellEditWin','height=200,width=350,scrollbars=no,resizeable=yes,alwaysRaised=yes,dependent=yes',true);
308: editwin.document.write(edit_text);
309: }
310: </script>
311: ENDSCRIPT
312: }
313: $r->print('</head>'.&Apache::loncommon::bodytag('Grades Spreadsheet').
314: '<form action="'.$r->uri.'" name="sheet" method="post">');
315: $r->print(&hiddenfield('sname' ,$ENV{'form.sname'}).
316: &hiddenfield('sdomain',$ENV{'form.sdomain'}).
1.6 matthew 317: &hiddenfield('usymb' ,$ENV{'form.usymb'}));
1.1 matthew 318: $r->rflush();
319: ##
320: ## Determine the filename to use
321: my $filename = undef;
1.3 matthew 322: if ($allowed_to_edit) {
1.1 matthew 323: $filename = $ENV{'form.filename'} if (exists($ENV{'form.filename'}));
324: #
325: if (exists($ENV{'form.load'}) && exists($ENV{'form.loadfilename'})) {
326: $filename = $ENV{'form.loadfilename'};
1.7 matthew 327: $ENV{'form.workcopy'} = 'no';
1.1 matthew 328: }
329: }
330: ##
331: ## Make the spreadsheet
332: &Apache::Spreadsheet::initialize_spreadsheet_package();
333: my $spreadsheet = undef;
334: if ($sheettype eq 'classcalc') {
335: $spreadsheet = Apache::classcalc->new($name,$domain,$filename,undef);
336: } elsif ($sheettype eq 'studentcalc') {
337: $spreadsheet = Apache::studentcalc->new($name,$domain,$filename,undef);
1.2 matthew 338: } elsif ($sheettype eq 'assesscalc' &&
339: defined($symb) &&
1.3 matthew 340: $allowed_to_edit) {
1.1 matthew 341: $spreadsheet = Apache::assesscalc->new($name,$domain,$filename,$symb);
342: } else {
1.2 matthew 343: return HTTP_NOT_ACCEPTABLE;
344: }
345: if (! defined($spreadsheet)) {
346: # error error - run in circles, scream and shout
1.1 matthew 347: return;
348: }
1.8 matthew 349: $spreadsheet->initialize();
1.5 matthew 350: #
351: # Output selector
1.1 matthew 352: ##
353: ## Editing/loading/saving
1.3 matthew 354: if ($allowed_to_edit) {
1.10 ! matthew 355: if ($ENV{'form.makedefault'}) {
! 356: $spreadsheet->make_default();
! 357: }
1.5 matthew 358: $r->print('<table><tr><td>'.$spreadsheet->html_header().'</td>'.
359: '<td valign="bottom">'.
360: &file_dialogs($spreadsheet)."</td></tr></table>\n");
1.1 matthew 361: $r->rflush();
1.5 matthew 362: } else {
363: $r->print('<table><tr><td>'.$spreadsheet->html_header().
364: "</td></tr></table>\n");
1.1 matthew 365: }
366: #
1.10 ! matthew 367: if (! exists($ENV{'form.not_first_run'}) && $sheettype eq 'classcalc') {
! 368: $r->print('<input type="submit" value="Generate Spreadsheet" /><br />');
! 369: }
! 370: #
1.1 matthew 371: # Keep track of the filename
372: $r->print(&hiddenfield('filename',$filename));
373: #
1.5 matthew 374: # Keep track of the number of times we have been called, sort of.
375: $r->print(&hiddenfield('not_first_run','whatever'));
376: #
377: if (exists($ENV{'form.not_first_run'}) || $sheettype ne 'classcalc') {
378: $r->print($spreadsheet->get_html_title());
379: if ($allowed_to_view || $allowed_to_edit) {
380: $r->print($spreadsheet->parent_link());
381: }
382: $spreadsheet->display($r);
1.1 matthew 383: }
384: $r->print('</form></body></html>');
385: return OK;
386: }
387:
388: 1;
389:
390: __END__
391:
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