Annotation of rat/lonpage.pm, revision 1.53
1.1 www 1: # The LearningOnline Network with CAPA
2: # Page Handler
3: #
1.53 ! www 4: # $Id: lonpage.pm,v 1.52 2003/07/19 13:11:41 ng Exp $
1.29 www 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: #
1.1 www 28: # (TeX Content Handler
29: #
1.30 harris41 30: # YEAR=2000
1.1 www 31: # 05/29/00,05/30 Gerd Kortemeyer)
1.10 www 32: # 08/30,08/31,09/06,09/14,09/15,09/16,09/19,09/20,09/21,09/23,
1.24 www 33: # 10/02,10/10,10/14,10/16,10/18,10/19,10/31,11/6,11/14,11/16,
1.30 harris41 34: # YEAR=2001
1.27 www 35: # 08/13/01,08/30,10/1 Gerd Kortemeyer
1.33 www 36: # YEAR=2002
37: # 03/19 Gerd Kortemeyer
1.30 harris41 38: #
39: ###
1.1 www 40:
41: package Apache::lonpage;
42:
43: use strict;
44: use Apache::Constants qw(:common :http);
45: use Apache::lonnet();
1.30 harris41 46: use Apache::loncommon();
1.21 www 47: use Apache::lonxml();
1.49 www 48: use Apache::lonmenu;
1.6 www 49: use HTML::TokeParser;
1.1 www 50: use GDBM_File;
1.39 www 51: use Apache::lonsequence;
1.1 www 52:
1.2 www 53: # -------------------------------------------------------------- Module Globals
54: my %hash;
55: my @rows;
1.6 www 56:
57: # ------------------------------------------------------------------ Euclid gcd
58:
59: sub euclid {
60: my ($e,$f)=@_;
61: my $a; my $b; my $r;
62: if ($e>$f) { $b=$e; $r=$f; } else { $r=$e; $b=$f; }
63: while ($r!=0) {
64: $a=$b; $b=$r;
65: $r=$a%$b;
66: }
67: return $b;
68: }
1.2 www 69:
70: # ------------------------------------------------------------ Build page table
71:
72: sub tracetable {
73: my ($sofar,$rid,$beenhere)=@_;
74: my $further=$sofar;
75: unless ($beenhere=~/\&$rid\&/) {
76: $beenhere.=$rid.'&';
77:
78: if (defined($hash{'is_map_'.$rid})) {
79: if ((defined($hash{'map_start_'.$hash{'src_'.$rid}})) &&
80: (defined($hash{'map_finish_'.$hash{'src_'.$rid}}))) {
1.4 www 81: my $frid=$hash{'map_finish_'.$hash{'src_'.$rid}};
82: $sofar=
1.2 www 83: &tracetable($sofar,$hash{'map_start_'.$hash{'src_'.$rid}},
1.3 www 84: '&'.$frid.'&');
1.4 www 85: $sofar++;
86: if ($hash{'src_'.$frid}) {
1.3 www 87: my $brepriv=&Apache::lonnet::allowed('bre',$hash{'src_'.$frid});
88: if (($brepriv eq '2') || ($brepriv eq 'F')) {
89: if (defined($rows[$sofar])) {
90: $rows[$sofar].='&'.$frid;
91: } else {
92: $rows[$sofar]=$frid;
93: }
94: }
1.4 www 95: }
1.2 www 96: }
97: } else {
1.4 www 98: $sofar++;
99: if ($hash{'src_'.$rid}) {
1.3 www 100: my $brepriv=&Apache::lonnet::allowed('bre',$hash{'src_'.$rid});
101: if (($brepriv eq '2') || ($brepriv eq 'F')) {
102: if (defined($rows[$sofar])) {
1.2 www 103: $rows[$sofar].='&'.$rid;
1.3 www 104: } else {
1.2 www 105: $rows[$sofar]=$rid;
1.3 www 106: }
107: }
1.4 www 108: }
1.2 www 109: }
110:
111: if (defined($hash{'to_'.$rid})) {
1.11 www 112: my $mincond=1;
113: my $next='';
1.30 harris41 114: foreach (split(/\,/,$hash{'to_'.$rid})) {
1.11 www 115: my $thiscond=
116: &Apache::lonnet::directcondval($hash{'condid_'.$hash{'undercond_'.$_}});
117: if ($thiscond>=$mincond) {
118: if ($next) {
119: $next.=','.$_.':'.$thiscond;
120: } else {
121: $next=$_.':'.$thiscond;
122: }
123: if ($thiscond>$mincond) { $mincond=$thiscond; }
124: }
1.30 harris41 125: }
126: foreach (split(/\,/,$next)) {
1.11 www 127: my ($linkid,$condval)=split(/\:/,$_);
128: if ($condval>=$mincond) {
129: my $now=&tracetable($sofar,$hash{'goesto_'.$linkid},$beenhere);
130: if ($now>$further) { $further=$now; }
131: }
1.30 harris41 132: }
1.11 www 133:
1.2 www 134: }
135: }
136: return $further;
137: }
138:
1.1 www 139: # ================================================================ Main Handler
140:
141: sub handler {
142: my $r=shift;
143:
1.3 www 144: # ------------------------------------------- Set document type for header only
1.1 www 145:
1.3 www 146: if ($r->header_only) {
147: if ($ENV{'browser.mathml'}) {
1.53 ! www 148: &Apache::loncommon::content_type($r,'text/xml');
1.3 www 149: } else {
1.53 ! www 150: &Apache::loncommon::content_type($r,'text/html');
1.3 www 151: }
152: $r->send_http_header;
153: return OK;
154: }
1.43 sakharuk 155:
1.39 www 156: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
157: ['forceselect','launch']);
1.43 sakharuk 158: my $number_of_columns = 1;
1.37 sakharuk 159: my $requrl=$r->uri;
160: my $target = $ENV{'form.grade_target'};
1.1 www 161: # ----------------------------------------------------------------- Tie db file
1.39 www 162: if (($ENV{'request.course.fn'}) && (!$ENV{'form.forceselect'})) {
1.1 www 163: my $fn=$ENV{'request.course.fn'};
164: if (-e "$fn.db") {
1.44 albertel 165: if (tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER(),0640)) {
1.1 www 166: # ------------------------------------------------------------------- Hash tied
167: my $firstres=$hash{'map_start_'.$requrl};
168: my $lastres=$hash{'map_finish_'.$requrl};
169: if (($firstres) && ($lastres)) {
170: # ----------------------------------------------------------------- Render page
171:
1.3 www 172: @rows=();
1.2 www 173:
1.45 www 174: &tracetable(0,$firstres,'&');
1.2 www 175:
1.9 www 176: # ------------------------------------------------------------ Add to symb list
177:
1.2 www 178: my $i;
1.9 www 179: my %symbhash=();
180: for ($i=0;$i<=$#rows;$i++) {
181: if ($rows[$i]) {
182: my @colcont=split(/\&/,$rows[$i]);
1.30 harris41 183: foreach (@colcont) {
1.9 www 184: $symbhash{$hash{'src_'.$_}}='';
1.30 harris41 185: }
1.9 www 186: }
187: }
188: &Apache::lonnet::symblist($requrl,%symbhash);
189:
190: # ------------------------------------------------------------------ Page parms
191:
1.4 www 192: my $j;
1.6 www 193: my $lcm=1;
194: my $contents=0;
1.7 www 195: my $nforms=0;
1.6 www 196:
197: my %ssibody=();
198: my %ssibgcolor=();
199: my %ssitext=();
200: my %ssilink=();
201: my %ssivlink=();
202: my %ssialink=();
1.14 www 203:
204: my %metalink=();
205:
1.6 www 206: my %cellemb=();
1.3 www 207:
1.7 www 208: my $allscript='';
209: my $allmeta='';
210:
211: my $isxml=0;
212: my $xmlheader='';
213: my $xmlbody='';
214:
1.3 www 215: # --------------------------------------------- Get SSI output, post parameters
216:
1.2 www 217: for ($i=0;$i<=$#rows;$i++) {
1.4 www 218: if ($rows[$i]) {
1.6 www 219: $contents++;
1.3 www 220: my @colcont=split(/\&/,$rows[$i]);
1.6 www 221: $lcm*=($#colcont+1)/euclid($lcm,($#colcont+1));
1.30 harris41 222: foreach (@colcont) {
1.3 www 223: my $src=$hash{'src_'.$_};
1.5 www 224: $src=~/\.(\w+)$/;
1.14 www 225: $metalink{$_}=$src.'.meta';
1.30 harris41 226: $cellemb{$_}=Apache::loncommon::fileembstyle($1);
1.3 www 227: if ($cellemb{$_} eq 'ssi') {
228: # --------------------------------------------------------- This is an SSI cell
1.5 www 229: my $prefix=$_.'_';
230: my %posthash=('request.prefix' => $prefix);
1.8 www 231: if (($ENV{'form.'.$prefix.'submit'})
1.7 www 232: || ($ENV{'form.all_submit'})) {
1.30 harris41 233: foreach (keys %ENV) {
1.5 www 234: if ($_=~/^form.$prefix/) {
235: my $name=$_;
236: $name=~s/^form.$prefix//;
237: $posthash{$name}=$ENV{$_};
238: }
1.30 harris41 239: }
1.7 www 240: }
1.5 www 241: my $output=Apache::lonnet::ssi($src,%posthash);
1.50 www 242: $output=~
243: s/\/\/ BEGIN LON\-CAPA Internal.+\/\/ END LON\-CAPA Internal\s//gs;
1.46 sakharuk 244: if ($target eq 'tex') {
245: $output =~ s/^([^&]+)\\begin{document}//;
246: $output =~ s/\\end{document}//;
247: $output = '\parbox{\minipagewidth}{ '.$output.' }';
248: #some additional cleanup necessary for LateX (due to limitations of table environment
249: $output =~ s/(\\vskip\s*\d+mm)\s*(\\\\)+/$1/g;
250: }
1.6 www 251: my $parser=HTML::TokeParser->new(\$output);
252: my $token;
1.12 www 253: my $thisdir=$src;
1.6 www 254: my $bodydef=0;
1.7 www 255: my $thisxml=0;
1.12 www 256: my @rlinks=();
1.7 www 257: if ($output=~/\?xml/) {
258: $isxml=1;
259: $thisxml=1;
260: $output=~
261: /((?:\<(?:\?xml|\!DOC|html)[^\>]*(?:\>|\>\]\>)\s*)+)\<body[^\>]*\>/si;
262: $xmlheader=$1;
263: }
1.12 www 264: while ($token=$parser->get_token) {
265: if ($token->[0] eq 'S') {
266: if ($token->[1] eq 'a') {
267: if ($token->[2]->{'href'}) {
268: $rlinks[$#rlinks+1]=
269: $token->[2]->{'href'};
270: }
271: } elsif ($token->[1] eq 'img') {
272: $rlinks[$#rlinks+1]=
273: $token->[2]->{'src'};
274: } elsif ($token->[1] eq 'embed') {
275: $rlinks[$#rlinks+1]=
276: $token->[2]->{'src'};
277: } elsif ($token->[1] eq 'base') {
278: $thisdir=$token->[2]->{'href'};
279: } elsif ($token->[1] eq 'body') {
1.7 www 280: $bodydef=1;
281: $ssibgcolor{$_}=$token->[2]->{'bgcolor'};
282: $ssitext{$_}=$token->[2]->{'text'};
283: $ssilink{$_}=$token->[2]->{'link'};
284: $ssivlink{$_}=$token->[2]->{'vlink'};
285: $ssialink{$_}=$token->[2]->{'alink'};
286: if ($thisxml) {
287: $xmlbody=$token->[4];
288: }
1.12 www 289: } elsif ($token->[1] eq 'meta') {
1.28 albertel 290: if ($token->[4] !~ m:/>$:) {
1.7 www 291: $allmeta.="\n".$token->[4].'</meta>';
1.28 albertel 292: } else {
293: $allmeta.="\n".$token->[4];
294: }
1.12 www 295: } elsif (($token->[1] eq 'script') &&
296: ($bodydef==0)) {
1.7 www 297: $allscript.="\n\n"
298: .$parser->get_text('/script');
1.6 www 299: }
1.12 www 300: }
301: }
1.6 www 302: if ($output=~/\<body[^\>]*\>(.*)/si) {
303: $output=$1;
304: }
305: $output=~s/\<\/body\>.*//si;
1.7 www 306: if ($output=~/\<form/si) {
307: $nforms++;
308: $output=~s/\<form[^\>]*\>//gsi;
309: $output=~s/\<\/form[^\>]*\>//gsi;
1.17 www 310: $output=~
1.18 www 311: s/\<((?:input|select|button|textarea)[^\>]+)name\s*\=\s*[\'\"]*([\w\.\:]+)[\'\"]*([^\>]*)\>/\<$1 name="$prefix$2" $3\>/gsi;
1.7 www 312: }
1.12 www 313: $thisdir=~s/\/[^\/]*$//;
1.30 harris41 314: foreach (@rlinks) {
1.12 www 315: unless (($_=~/^http:\/\//i) ||
1.31 albertel 316: ($_=~/^\//) ||
317: ($_=~/^javascript:/i) ||
318: ($_=~/^mailto:/i) ||
319: ($_=~/^\#/)) {
1.12 www 320: my $newlocation=
321: &Apache::lonnet::hreflocation($thisdir,$_);
322: $output=~s/(\"|\'|\=\s*)$_(\"|\'|\s|\>)/$1$newlocation$2/;
323: }
1.30 harris41 324: }
1.24 www 325: # -------------------------------------------------- Deal with Applet codebases
326: $output=~s/(\<applet[^\>]+)(codebase\=[^\S\>]+)*([^\>]*)\>/$1.($2?$2:' codebase="'.$thisdir.'"').$3.'>'/gei;
1.5 www 327: $ssibody{$_}=$output;
1.3 www 328: # ---------------------------------------------------------------- End SSI cell
329: }
1.30 harris41 330: }
1.4 www 331: }
1.2 www 332: }
1.6 www 333: unless ($contents) {
1.53 ! www 334: &Apache::loncommon::content_type($r,'text/html');
1.3 www 335: $r->send_http_header;
1.53 ! www 336: $r->print('<html><body>'.&mt('Empty page').'.</body></html>');
1.3 www 337: } else {
338: # ------------------------------------------------------------------ Build page
1.7 www 339:
340: # ---------------------------------------------------------------- Send headers
1.37 sakharuk 341: unless ($target eq 'tex') {
342: if ($isxml) {
1.53 ! www 343: &Apache::loncommon::content_type($r,'text/xml');
1.37 sakharuk 344: $r->send_http_header;
345: $r->print($xmlheader);
346: } else {
1.53 ! www 347: &Apache::loncommon::content_type($r,'text/html');
1.37 sakharuk 348: $r->send_http_header;
349: $r->print('<html>');
350: }
1.7 www 351: # ------------------------------------------------------------------------ Head
1.37 sakharuk 352: $r->print("\n<head>\n".$allmeta);
353: if ($allscript) {
354: $r->print("\n<script language='JavaScript'>\n".
355: $allscript."\n</script>\n");
356: }
1.49 www 357: $r->print(&Apache::lonmenu::registerurl(1,undef));
1.37 sakharuk 358: $r->print("\n</head>\n");
1.7 www 359: # ------------------------------------------------------------------ Start body
1.37 sakharuk 360: if ($isxml) {
361: $r->print($xmlbody);
362: } else {
1.51 www 363: $r->print(
364: '<body bgcolor="#FFFFFF" onLoad="'.&Apache::lonmenu::loadevents.
365: '" onUnload="'.&Apache::lonmenu::unloadevents.'">'.
366: &Apache::lonmenu::menubuttons(undef,$target,1)
367: );
1.37 sakharuk 368: }
1.7 www 369: # ------------------------------------------------------------------ Start form
1.37 sakharuk 370: if ($nforms) {
371: $r->print('<form method="post" action="'.
372: $requrl.'">');
1.40 sakharuk 373: }
374: } else {
1.47 sakharuk 375: $r->print('\documentclass{article}
1.40 sakharuk 376: \newcommand{\keephidden}[1]{}
377: \usepackage[dvips]{graphicx}
378: \usepackage{epsfig}
379: \usepackage{calc}
1.42 sakharuk 380: \usepackage{longtable}
1.40 sakharuk 381: \begin{document}');
382: }
1.7 www 383: # ----------------------------------------------------------------- Start table
1.40 sakharuk 384: if ($target eq 'tex') {
1.42 sakharuk 385: $r->print('\begin{longtable}INSERTTHEHEADOFLONGTABLE\endfirsthead\endhead ');
1.43 sakharuk 386: if ($number_of_columns le $lcm) {$number_of_columns=$lcm;};
1.40 sakharuk 387: } else {
1.37 sakharuk 388: $r->print('<table cols="'.$lcm.'" border="0">');
389: }
1.5 www 390: for ($i=0;$i<=$#rows;$i++) {
391: if ($rows[$i]) {
1.37 sakharuk 392: unless ($target eq 'tex') {
393: $r->print("\n<tr>");
394: }
1.4 www 395: my @colcont=split(/\&/,$rows[$i]);
1.6 www 396: my $avespan=$lcm/($#colcont+1);
397: for ($j=0;$j<=$#colcont;$j++) {
398: my $rid=$colcont[$j];
1.23 www 399: my $metainfo='<a href="'.
400: $metalink{$rid}.'" target="LONcatInfo">'.
401: '<img src="/adm/lonMisc/cat_button.gif" border=0>'.
1.34 www 402: '</img></a><a href="/adm/evaluate?postdata='.
1.35 www 403: &Apache::lonnet::escape(&Apache::lonnet::declutter($hash{'src_'.$rid}))
404: .'" target="LONcatInfo">'.
1.33 www 405: '<img src="/adm/lonMisc/eval_button.gif" border=0>'.
406: '</img></a>';
1.27 www 407: if (
408: ($hash{'src_'.$rid}=~/\.(problem|exam|quiz|assess|survey|form)$/) &&
409: (&Apache::lonnet::allowed('mgr',$ENV{'request.course.id'}))) {
410: my ($mapid,$resid)=split(/\./,$rid);
411: my $symb=
412: &Apache::lonnet::declutter($hash{'map_id_'.$mapid}).
413: '___'.$resid.'___'.
414: &Apache::lonnet::declutter($hash{'src_'.$rid});
415: $metainfo.=
1.36 www 416: '<a href="/adm/grades?symb='.&Apache::lonnet::escape($symb).
1.52 ng 417: # '&command=submission" target="LONcatInfo">'.
418: '&command=submission">'.
1.27 www 419: '<img src="/adm/lonMisc/subm_button.gif" border=0>'.
420: '</img></a>'.
1.36 www 421: '<a href="/adm/grades?symb='.&Apache::lonnet::escape($symb).
1.52 ng 422: # '&command=gradingmenu" target="LONcatInfo">'.
423: '&command=gradingmenu">'.
1.27 www 424: '<img src="/adm/lonMisc/pgrd_button.gif" border=0>'.
425: '</img></a>'.
1.36 www 426: '<a href="/adm/parmset?symb='.&Apache::lonnet::escape($symb).
1.52 ng 427: # '" target="LONcatInfo">'.
428: '" >'.
1.27 www 429: '<img src="/adm/lonMisc/pprm_button.gif" border=0>'.
430: '</img></a>';
431: }
432: $metainfo.='<br></br>';
1.37 sakharuk 433: unless ($target eq 'tex') {
434: $r->print('<td colspan="'.$avespan.'"');
435: }
1.6 www 436: if ($cellemb{$rid} eq 'ssi') {
1.37 sakharuk 437: unless ($target eq 'tex') {
438: if ($ssibgcolor{$rid}) {
439: $r->print(' bgcolor="'.
440: $ssibgcolor{$rid}.'"');
441: }
442: $r->print('>'.$metainfo.'<font');
443:
444: if ($ssitext{$rid}) {
445: $r->print(' text="'.$ssitext{$rid}.'"');
446: }
447: if ($ssilink{$rid}) {
448: $r->print(' link="'.$ssilink{$rid}.'"');
449: }
450: if ($ssitext{$rid}) {
451: $r->print(' vlink="'.$ssivlink{$rid}.'"');
452: }
453: if ($ssialink{$rid}) {
454: $r->print(' alink="'.$ssialink{$rid}.'"');
455: }
456: $r->print('>');
457: }
458: $r->print($ssibody{$rid});
459: unless ($target eq 'tex') {
460: $r->print('</font>');
1.41 www 461: }
462: if ($ENV{'course.'.
463: $ENV{'request.course.id'}.
464: '.pageseparators'} eq 'yes') {
465: unless($target eq 'tex') {
466: $r->print('<hr />');
467: } else {
468: $r->print('\hline');
469: }
1.37 sakharuk 470: }
471: } elsif ($cellemb{$rid} eq 'img') {
1.14 www 472: $r->print('>'.$metainfo.'<img src="'.
1.7 www 473: $hash{'src_'.$rid}.'"></img>');
1.13 www 474: } elsif ($cellemb{$rid} eq 'emb') {
1.14 www 475: $r->print('>'.$metainfo.'<embed src="'.
1.13 www 476: $hash{'src_'.$rid}.'"></embed>');
477: }
1.37 sakharuk 478: unless ($target eq 'tex') {
479: $r->print('</td>');
1.40 sakharuk 480: } else {
1.43 sakharuk 481: for (my $incol=1;$incol<=$avespan;$incol++) {
482: $r->print(' & ');
483: }
1.37 sakharuk 484: }
1.4 www 485: }
1.37 sakharuk 486: unless ($target eq 'tex') {
487: $r->print('</tr>');
1.40 sakharuk 488: } else {
1.42 sakharuk 489: $r->print('REMOVETHEHEADOFLONGTABLE\\\\');
1.37 sakharuk 490: }
1.5 www 491: }
1.4 www 492: }
1.37 sakharuk 493: unless ($target eq 'tex') {
494: $r->print("\n</table>");
1.40 sakharuk 495: } else {
1.47 sakharuk 496: $r->print('\end{longtable}\strut');
1.37 sakharuk 497: }
1.7 www 498: # ---------------------------------------------------------------- Submit, etc.
499: if ($nforms) {
500: $r->print(
501: '<input name="all_submit" value="Submit All" type="'.
502: (($nforms>1)?'submit':'hidden').'"></input></form>');
503: }
1.40 sakharuk 504: unless ($target eq 'tex') {
505: $r->print('</body>'.&Apache::lonxml::xmlend());
506: } else {
507: $r->print('\end{document}'.$number_of_columns);
508: }
1.3 www 509: # -------------------------------------------------------------------- End page
510: }
1.1 www 511: # ------------------------------------------------------------- End render page
512: } else {
1.3 www 513: $r->content_type('text/html');
514: $r->send_http_header;
1.39 www 515: &Apache::lonsequence::viewmap($r,$requrl);
1.1 www 516: }
517: # ------------------------------------------------------------------ Untie hash
518: unless (untie(%hash)) {
519: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
520: "Could not untie coursemap $fn (browse).</font>");
521: }
522: # -------------------------------------------------------------------- All done
523: return OK;
524: # ----------------------------------------------- Errors, hash could no be tied
525: }
526: }
527: }
1.39 www 528: $r->content_type('text/html');
529: $r->send_http_header;
530: &Apache::lonsequence::viewmap($r,$requrl);
531: return OK;
1.1 www 532: }
533:
534: 1;
535: __END__
536:
1.30 harris41 537: =head1 NAME
538:
539: Apache::lonpage - Page Handler
540:
541: =head1 SYNOPSIS
542:
543: Invoked by /etc/httpd/conf/srm.conf:
544:
545: <LocationMatch "^/res/.*\.page$>
546: SetHandler perl-script
547: PerlHandler Apache::lonpage
548: </LocationMatch>
549:
550: =head1 INTRODUCTION
551:
552: This module renders a .page resource.
553:
554: This is part of the LearningOnline Network with CAPA project
555: described at http://www.lon-capa.org.
556:
557: =head1 HANDLER SUBROUTINE
558:
559: This routine is called by Apache and mod_perl.
560:
561: =over 4
562:
563: =item *
564:
565: set document type for header only
566:
567: =item *
568:
569: tie db file
570:
571: =item *
572:
573: render page
574:
575: =item *
576:
577: add to symb list
578:
579: =item *
580:
581: page parms
582:
583: =item *
584:
585: Get SSI output, post parameters
586:
587: =item *
588:
589: SSI cell rendering
590:
591: =item *
592:
593: Deal with Applet codebases
594:
595: =item *
596:
597: Build page
598:
599: =item *
600:
601: send headers
602:
603: =item *
604:
605: start body
606:
607: =item *
608:
609: start form
610:
611: =item *
612:
613: start table
614:
615: =item *
616:
617: submit element, etc, render page, untie hash
618:
619: =back
620:
621: =head1 OTHER SUBROUTINES
622:
623: =over 4
624:
625: =item *
626:
627: euclid() : Euclid's method for determining the greatest common denominator.
628:
629: =item *
630:
631: tracetable() : Build page table.
1.1 www 632:
1.30 harris41 633: =back
1.1 www 634:
1.30 harris41 635: =cut
1.1 www 636:
637:
638:
639:
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