Annotation of loncom/xml/lonxml.pm, revision 1.81
1.2 sakharuk 1: # The LearningOnline Network with CAPA
1.3 sakharuk 2: # XML Parser Module
1.2 sakharuk 3: #
1.3 sakharuk 4: # last modified 06/26/00 by Alexander Sakharuk
1.33 www 5: # 11/6 Gerd Kortemeyer
1.45 www 6: # 6/1/1 Gerd Kortemeyer
1.56 albertel 7: # 2/21,3/13 Guy
1.68 www 8: # 3/29,5/4 Gerd Kortemeyer
1.73 harris41 9: # 5/10 Scott Harrison
1.78 www 10: # 5/26 Gerd Kortemeyer
1.80 harris41 11: # 5/27 H. K. Ng
1.2 sakharuk 12:
1.4 albertel 13: package Apache::lonxml;
1.33 www 14: use vars
1.76 albertel 15: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace);
1.1 sakharuk 16: use strict;
17: use HTML::TokeParser;
1.3 sakharuk 18: use Safe;
1.40 albertel 19: use Safe::Hole;
1.81 ! ng 20: use Math::Cephes qw(:trigs :hypers :bessels erf erfc);
1.13 albertel 21: use Opcode;
1.72 albertel 22:
23: sub register {
24: my $space;
25: my @taglist;
26: my $temptag;
27: ($space,@taglist) = @_;
28: foreach $temptag (@taglist) {
29: $Apache::lonxml::alltags{$temptag}=$space;
30: }
31: }
32:
1.46 www 33: use Apache::Constants qw(:common);
1.71 www 34: use Apache::lontexconvert;
1.72 albertel 35: use Apache::style;
36: use Apache::run;
37: use Apache::londefdef;
38: use Apache::scripttag;
39: use Apache::edit;
1.79 www 40: use Apache::lonnet;
41: use Apache::File;
42:
1.72 albertel 43: #================================================== Main subroutine: xmlparse
44: #debugging control, to turn on debugging modify the correct handler
45: $Apache::lonxml::debug=0;
46:
47: #path to the directory containing the file currently being processed
48: @pwd=();
49:
50: #these two are used for capturing a subset of the output for later processing,
51: #don't touch them directly use &startredirection and &endredirection
52: @outputstack = ();
53: $redirection = 0;
54:
55: #controls wheter the <import> tag actually does
56: $import = 1;
57: @extlinks=();
58:
59: # meta mode is a bit weird only some output is to be turned off
60: #<output> tag turns metamode off (defined in londefdef.pm)
61: $metamode = 0;
62:
63: # turns on and of run::evaluate actually derefencing var refs
64: $evaluate = 1;
1.7 albertel 65:
1.74 albertel 66: # data structure for eidt mode, determines what tags can go into what other tags
67: %insertlist=();
1.68 www 68:
1.76 albertel 69: #stores the list of active tag namespaces
70: @namespace=();
71:
1.68 www 72: sub xmlbegin {
73: my $output='';
74: if ($ENV{'browser.mathml'}) {
75: $output='<?xml version="1.0"?>'
76: .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
77: .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
78: .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
79: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
80: .'xmlns="http://www.w3.org/TR/REC-html40">';
81: } else {
82: $output='<html>';
83: }
84: return $output;
85: }
86:
87: sub xmlend {
88: return '</html>';
89: }
90:
1.70 www 91: sub fontsettings() {
92: my $headerstring='';
93: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
94: $headerstring.=
95: '<meta Content-Type="text/html; charset=x-mac-roman">';
96: }
97: return $headerstring;
98: }
99:
1.68 www 100: sub registerurl {
101: return (<<ENDSCRIPT);
102: <script language="JavaScript">
1.71 www 103: // BEGIN LON-CAPA Internal
1.69 www 104: function LONCAPAreg() {
105: if (window.location.pathname!="/res/adm/pages/menu.html") {
106: menu=window.open("","LONCAPAmenu");
107: menu.currentURL=window.location.pathname;
108: menu.currentStale=0;
109: }
110: }
111:
112: function LONCAPAstale() {
113: if (window.location.pathname!="/res/adm/pages/menu.html") {
114: menu=window.open("","LONCAPAmenu");
115: menu.currentStale=1;
116: }
1.68 www 117: }
1.71 www 118: // END LON-CAPA Internal
1.68 www 119: </script>
120: ENDSCRIPT
1.69 www 121: }
122:
123: sub loadevents() {
124: return 'LONCAPAreg();';
125: }
126:
127: sub unloadevents() {
128: return 'LONCAPAstale();';
1.68 www 129: }
130:
1.48 albertel 131: sub printalltags {
132: my $temp;
133: foreach $temp (sort keys %Apache::lonxml::alltags) {
1.64 albertel 134: &Apache::lonxml::debug("$temp -- $Apache::lonxml::alltags{$temp}");
1.48 albertel 135: }
136: }
1.31 sakharuk 137:
1.3 sakharuk 138: sub xmlparse {
139:
1.18 albertel 140: my ($target,$content_file_string,$safeinit,%style_for_target) = @_;
1.41 albertel 141: if ($target eq 'meta') {
1.59 albertel 142: $Apache::lonxml::redirection = 0;
143: $Apache::lonxml::metamode = 1;
1.72 albertel 144: $Apache::lonxml::evaluate = 1;
1.55 albertel 145: $Apache::lonxml::import = 0;
1.47 albertel 146: } elsif ($target eq 'grade') {
1.55 albertel 147: &startredirection;
1.59 albertel 148: $Apache::lonxml::metamode = 0;
1.72 albertel 149: $Apache::lonxml::evaluate = 1;
1.55 albertel 150: $Apache::lonxml::import = 1;
1.72 albertel 151: } elsif ($target eq 'modified') {
152: $Apache::lonxml::redirection = 0;
153: $Apache::lonxml::metamode = 0;
154: $Apache::lonxml::evaluate = 0;
155: $Apache::lonxml::import = 0;
1.44 albertel 156: } else {
1.72 albertel 157: $Apache::lonxml::redirection = 0;
1.59 albertel 158: $Apache::lonxml::metamode = 0;
1.72 albertel 159: $Apache::lonxml::evaluate = 1;
1.55 albertel 160: $Apache::lonxml::import = 1;
1.32 sakharuk 161: }
1.48 albertel 162: #&printalltags();
1.16 albertel 163: my @pars = ();
1.23 albertel 164: @Apache::lonxml::pwd=();
165: my $pwd=$ENV{'request.filename'};
166: $pwd =~ s:/[^/]*$::;
167: &newparser(\@pars,\$content_file_string,$pwd);
1.3 sakharuk 168: my $currentstring = '';
169: my $finaloutput = '';
170: my $newarg = '';
1.16 albertel 171: my $result;
1.24 sakharuk 172:
1.3 sakharuk 173: my $safeeval = new Safe;
1.40 albertel 174: my $safehole = new Safe::Hole;
1.6 albertel 175: $safeeval->permit("entereval");
1.13 albertel 176: $safeeval->permit(":base_math");
1.77 www 177: $safeeval->permit("sort");
1.19 albertel 178: $safeeval->deny(":base_io");
1.40 albertel 179: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
1.81 ! ng 180:
! 181: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
! 182: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
! 183: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
! 184: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
! 185: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
! 186: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
! 187: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
! 188: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
! 189: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
1.80 harris41 190: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
191: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
192: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
193: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
194: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
195: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
196: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
197: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
198: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
199: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
200:
1.19 albertel 201: #need to inspect this class of ops
202: # $safeeval->deny(":base_orig");
1.21 albertel 203: $safeinit .= ';$external::target='.$target.';';
1.26 albertel 204: $safeinit .= ';$external::randomseed='.&Apache::lonnet::rndseed().';';
1.21 albertel 205: &Apache::run::run($safeinit,$safeeval);
1.3 sakharuk 206: #-------------------- Redefinition of the target in the case of compound target
207:
208: ($target, my @tenta) = split('&&',$target);
209:
210: my @stack = ();
211: my @parstack = ();
1.17 albertel 212: &initdepth;
1.3 sakharuk 213: my $token;
1.16 albertel 214: while ( $#pars > -1 ) {
215: while ($token = $pars[$#pars]->get_token) {
1.57 albertel 216: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
1.61 albertel 217: if ($metamode<1) { $result=$token->[1]; }
1.57 albertel 218: } elsif ($token->[0] eq 'PI') {
1.61 albertel 219: if ($metamode<1) { $result=$token->[2]; }
1.16 albertel 220: } elsif ($token->[0] eq 'S') {
221: # add tag to stack
222: push (@stack,$token->[1]);
223: # add parameters list to another stack
224: push (@parstack,&parstring($token));
1.19 albertel 225: &increasedepth($token);
1.16 albertel 226: if (exists $style_for_target{$token->[1]}) {
1.61 albertel 227: if ($Apache::lonxml::redirection) {
1.55 albertel 228: $Apache::lonxml::outputstack['-1'] .=
229: &recurse($style_for_target{$token->[1]},$target,$safeeval,
230: \%style_for_target,@parstack);
1.41 albertel 231: } else {
1.55 albertel 232: $finaloutput .= &recurse($style_for_target{$token->[1]},$target,
233: $safeeval,\%style_for_target,@parstack);
1.41 albertel 234: }
1.16 albertel 235: } else {
1.17 albertel 236: $result = &callsub("start_$token->[1]", $target, $token,\@parstack,
1.41 albertel 237: \@pars, $safeeval, \%style_for_target);
1.16 albertel 238: }
239: } elsif ($token->[0] eq 'E') {
240: #clear out any tags that didn't end
1.55 albertel 241: while ($token->[1] ne $stack[$#stack] && ($#stack > -1)) {
242: &Apache::lonxml::warning("Unbalanced tags in resource $stack['-1']");
1.43 albertel 243: pop @stack;pop @parstack;&decreasedepth($token);
244: }
1.16 albertel 245:
246: if (exists $style_for_target{'/'."$token->[1]"}) {
1.61 albertel 247: if ($Apache::lonxml::redirection) {
1.55 albertel 248: $Apache::lonxml::outputstack['-1'] .=
249: &recurse($style_for_target{'/'."$token->[1]"},
250: $target,$safeeval,\%style_for_target,@parstack);
251: } else {
252: $finaloutput .= &recurse($style_for_target{'/'."$token->[1]"},
253: $target,$safeeval,\%style_for_target,
254: @parstack);
255: }
1.59 albertel 256:
1.16 albertel 257: } else {
1.17 albertel 258: $result = &callsub("end_$token->[1]", $target, $token, \@parstack,
1.55 albertel 259: \@pars,$safeeval, \%style_for_target);
1.13 albertel 260: }
1.57 albertel 261: } else {
262: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
1.16 albertel 263: }
1.55 albertel 264: #evaluate variable refs in result
1.25 sakharuk 265: if ($result ne "") {
1.24 sakharuk 266: if ( $#parstack > -1 ) {
1.55 albertel 267: if ($Apache::lonxml::redirection) {
268: $Apache::lonxml::outputstack['-1'] .=
269: &Apache::run::evaluate($result,$safeeval,$parstack[$#parstack]);
270: } else {
271: $finaloutput .= &Apache::run::evaluate($result,$safeeval,
272: $parstack[$#parstack]);
273: }
1.16 albertel 274: } else {
275: $finaloutput .= &Apache::run::evaluate($result,$safeeval,'');
1.13 albertel 276: }
1.16 albertel 277: $result = '';
1.55 albertel 278: }
279: if ($token->[0] eq 'E') {
280: pop @stack;pop @parstack;&decreasedepth($token);
1.2 sakharuk 281: }
1.5 albertel 282: }
1.16 albertel 283: pop @pars;
1.23 albertel 284: pop @Apache::lonxml::pwd;
1.3 sakharuk 285: }
1.24 sakharuk 286:
1.59 albertel 287: # if ($target eq 'meta') {
288: # $finaloutput.=&endredirection;
289: # }
1.67 www 290:
291: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
292: $finaloutput=&afterburn($finaloutput);
293: }
294:
1.3 sakharuk 295: return $finaloutput;
1.15 albertel 296: }
297:
1.67 www 298:
1.15 albertel 299: sub recurse {
300:
301: my @innerstack = ();
302: my @innerparstack = ();
303: my ($newarg,$target,$safeeval,$style_for_target,@parstack) = @_;
1.16 albertel 304: my @pat = ();
1.23 albertel 305: &newparser(\@pat,\$newarg);
1.15 albertel 306: my $tokenpat;
307: my $partstring = '';
308: my $output='';
1.16 albertel 309: my $decls='';
310: while ( $#pat > -1 ) {
311: while ($tokenpat = $pat[$#pat]->get_token) {
1.57 albertel 312: if (($tokenpat->[0] eq 'T') || ($tokenpat->[0] eq 'C') || ($tokenpat->[0] eq 'D') ) {
1.61 albertel 313: if ($metamode<1) { $partstring=$tokenpat->[1]; }
1.57 albertel 314: } elsif ($tokenpat->[0] eq 'PI') {
1.61 albertel 315: if ($metamode<1) { $partstring=$tokenpat->[2]; }
1.16 albertel 316: } elsif ($tokenpat->[0] eq 'S') {
317: push (@innerstack,$tokenpat->[1]);
318: push (@innerparstack,&parstring($tokenpat));
1.19 albertel 319: &increasedepth($tokenpat);
1.16 albertel 320: $partstring = &callsub("start_$tokenpat->[1]",
321: $target, $tokenpat, \@innerparstack,
322: \@pat, $safeeval, $style_for_target);
323: } elsif ($tokenpat->[0] eq 'E') {
324: #clear out any tags that didn't end
325: while ($tokenpat->[1] ne $innerstack[$#innerstack]
1.43 albertel 326: && ($#innerstack > -1)) {
1.49 albertel 327: &Apache::lonxml::warning("Unbalanced tags in resource $innerstack['-1']");
1.43 albertel 328: pop @innerstack;pop @innerparstack;&decreasedepth($tokenpat);
329: }
1.16 albertel 330: $partstring = &callsub("end_$tokenpat->[1]",
331: $target, $tokenpat, \@innerparstack,
332: \@pat, $safeeval, $style_for_target);
1.57 albertel 333: } else {
334: &Apache::lonxml::error("Unknown token event :$tokenpat->[0]:$tokenpat->[1]:");
1.16 albertel 335: }
336: #pass both the variable to the style tag, and the tag we
337: #are processing inside the <definedtag>
338: if ( $partstring ne "" ) {
339: if ( $#parstack > -1 ) {
340: if ( $#innerparstack > -1 ) {
341: $decls= $parstack[$#parstack].$innerparstack[$#innerparstack];
342: } else {
343: $decls= $parstack[$#parstack];
344: }
345: } else {
346: if ( $#innerparstack > -1 ) {
347: $decls=$innerparstack[$#innerparstack];
348: } else {
349: $decls='';
350: }
351: }
352: $output .= &Apache::run::evaluate($partstring,$safeeval,$decls);
353: $partstring = '';
354: }
1.17 albertel 355: if ($tokenpat->[0] eq 'E') { pop @innerstack;pop @innerparstack;
1.19 albertel 356: &decreasedepth($tokenpat);}
1.15 albertel 357: }
1.16 albertel 358: pop @pat;
1.23 albertel 359: pop @Apache::lonxml::pwd;
1.15 albertel 360: }
361: return $output;
1.7 albertel 362: }
363:
364: sub callsub {
1.14 albertel 365: my ($sub,$target,$token,$parstack,$parser,$safeeval,$style)=@_;
1.7 albertel 366: my $currentstring='';
1.72 albertel 367: my $nodefault;
1.7 albertel 368: {
1.59 albertel 369: my $sub1;
1.7 albertel 370: no strict 'refs';
1.59 albertel 371: if ($target eq 'edit' && $token->[0] eq 'S') {
372: $currentstring = &Apache::edit::tag_start($target,$token,$parstack,$parser,
373: $safeeval,$style);
374: }
1.68 www 375: my $tag=$token->[1];
376: my $space=$Apache::lonxml::alltags{$tag};
377: if (!$space) {
378: $tag=~tr/A-Z/a-z/;
379: $sub=~tr/A-Z/a-z/;
380: $space=$Apache::lonxml::alltags{$tag}
381: }
382: if ($space) {
1.72 albertel 383: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode<br />\n");
1.24 sakharuk 384: $sub1="$space\:\:$sub";
1.17 albertel 385: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
1.72 albertel 386: ($currentstring,$nodefault) = &$sub1($target,$token,$parstack,$parser,
387: $safeeval,$style);
1.7 albertel 388: } else {
1.72 albertel 389: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode<br />\n");
1.62 sakharuk 390: if ($metamode <1) {
391: if (defined($token->[4]) && ($metamode < 1)) {
1.72 albertel 392: $currentstring = $token->[4];
1.62 sakharuk 393: } else {
1.72 albertel 394: $currentstring = $token->[2];
1.62 sakharuk 395: }
1.7 albertel 396: }
1.59 albertel 397: }
1.72 albertel 398: &Apache::lonxml::debug("nodefalt:$nodefault:");
399: if ($currentstring eq '' && $nodefault eq '') {
400: if ($target eq 'edit') {
1.74 albertel 401: &Apache::lonxml::debug("doing default edit for $token->[1]");
1.72 albertel 402: if ($token->[0] eq 'S') {
1.74 albertel 403: $currentstring = &Apache::edit::tag_start($target,$token);
1.72 albertel 404: } elsif ($token->[0] eq 'E') {
1.74 albertel 405: $currentstring = &Apache::edit::tag_end($target,$token);
1.72 albertel 406: }
407: } elsif ($target eq 'modified') {
408: if ($token->[0] eq 'S') {
409: $currentstring = $token->[4];
1.76 albertel 410: $currentstring.=&Apache::edit::handle_insert();
1.72 albertel 411: } else {
412: $currentstring = $token->[2];
413: }
414: }
1.7 albertel 415: }
416: use strict 'refs';
417: }
418: return $currentstring;
1.17 albertel 419: }
420:
1.55 albertel 421: sub startredirection {
422: $Apache::lonxml::redirection++;
423: push (@Apache::lonxml::outputstack, '');
424: }
425:
426: sub endredirection {
427: if (!$Apache::lonxml::redirection) {
1.72 albertel 428: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
1.55 albertel 429: return '';
430: }
431: $Apache::lonxml::redirection--;
432: pop @Apache::lonxml::outputstack;
433: }
434:
1.17 albertel 435: sub initdepth {
436: @Apache::lonxml::depthcounter=();
437: $Apache::lonxml::depth=-1;
438: $Apache::lonxml::olddepth=-1;
439: }
440:
441: sub increasedepth {
1.19 albertel 442: my ($token) = @_;
1.17 albertel 443: $Apache::lonxml::depth++;
444: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
445: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
446: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
447: }
1.42 albertel 448: my $curdepth=join('_',@Apache::lonxml::depthcounter);
1.64 albertel 449: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
1.54 albertel 450: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
1.17 albertel 451: }
452:
453: sub decreasedepth {
1.19 albertel 454: my ($token) = @_;
1.17 albertel 455: $Apache::lonxml::depth--;
1.36 albertel 456: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
457: $#Apache::lonxml::depthcounter--;
458: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
459: }
1.43 albertel 460: if ( $Apache::lonxml::depth < -1) {
1.49 albertel 461: &Apache::lonxml::warning("Unbalanced tags in resource");
1.43 albertel 462: $Apache::lonxml::depth='-1';
463: }
1.42 albertel 464: my $curdepth=join('_',@Apache::lonxml::depthcounter);
1.64 albertel 465: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
1.54 albertel 466: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
1.1 sakharuk 467: }
1.19 albertel 468:
469: sub get_all_text {
470:
471: my($tag,$pars)= @_;
472: my $depth=0;
473: my $token;
474: my $result='';
1.57 albertel 475: if ( $tag =~ m:^/: ) {
476: my $tag=substr($tag,1);
477: # &Apache::lonxml::debug("have:$tag:");
478: while (($depth >=0) && ($token = $pars->get_token)) {
479: # &Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]");
480: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
481: $result.=$token->[1];
482: } elsif ($token->[0] eq 'PI') {
483: $result.=$token->[2];
484: } elsif ($token->[0] eq 'S') {
485: if ($token->[1] eq $tag) { $depth++; }
486: $result.=$token->[4];
487: } elsif ($token->[0] eq 'E') {
488: if ( $token->[1] eq $tag) { $depth--; }
489: #skip sending back the last end tag
490: if ($depth > -1) { $result.=$token->[2]; } else {
491: $pars->unget_token($token);
492: }
493: }
494: }
495: } else {
496: while ($token = $pars->get_token) {
497: # &Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
498: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
499: $result.=$token->[1];
500: } elsif ($token->[0] eq 'PI') {
501: $result.=$token->[2];
502: } elsif ($token->[0] eq 'S') {
503: if ( $token->[1] eq $tag) {
504: $pars->unget_token($token); last;
505: } else {
506: $result.=$token->[4];
507: }
508: } elsif ($token->[0] eq 'E') {
509: $result.=$token->[2];
1.36 albertel 510: }
1.19 albertel 511: }
512: }
1.49 albertel 513: # &Apache::lonxml::debug("Exit:$result:");
1.19 albertel 514: return $result
515: }
516:
1.23 albertel 517: sub newparser {
518: my ($parser,$contentref,$dir) = @_;
519: push (@$parser,HTML::TokeParser->new($contentref));
1.56 albertel 520: $$parser['-1']->xml_mode('1');
1.23 albertel 521: if ( $dir eq '' ) {
522: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
523: } else {
524: push (@Apache::lonxml::pwd, $dir);
525: }
526: # &Apache::lonxml::debug("pwd:$#Apache::lonxml::pwd");
527: # &Apache::lonxml::debug("pwd:$Apache::lonxml::pwd[$#Apache::lonxml::pwd]");
528: }
1.1 sakharuk 529:
1.8 albertel 530: sub parstring {
531: my ($token) = @_;
532: my $temp='';
1.20 albertel 533: map {
1.35 www 534: unless ($_=~/\W/) {
1.42 albertel 535: my $val=$token->[2]->{$_};
1.53 albertel 536: $val =~ s/([\%\@\\])/\\$1/g;
1.51 albertel 537: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1.42 albertel 538: $temp .= "my \$$_=\"$val\";"
1.20 albertel 539: }
540: } @{$token->[3]};
1.8 albertel 541: return $temp;
542: }
1.22 albertel 543:
1.34 www 544: sub writeallows {
545: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
546: my $thisdir=$thisurl;
547: $thisdir=~s/\/[^\/]+$//;
548: my %httpref=();
549: map {
550: $httpref{'httpref.'.
551: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl; } @extlinks;
552: &Apache::lonnet::appenv(%httpref);
553: }
554:
1.66 www 555: #
556: # Afterburner handles anchors, highlights and links
557: #
558: sub afterburn {
559: my $result=shift;
560: map {
561: my ($name, $value) = split(/=/,$_);
562: $value =~ tr/+/ /;
563: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
564: if (($name eq 'highlight')||($name eq 'anchor')||($name eq 'link')) {
565: unless ($ENV{'form.'.$name}) {
566: $ENV{'form.'.$name}=$value;
567: }
568: }
569: } (split(/&/,$ENV{'QUERY_STRING'}));
570: if ($ENV{'form.highlight'}) {
571: map {
572: my $anchorname=$_;
573: my $matchthis=$anchorname;
574: $matchthis=~s/\_+/\\s\+/g;
575: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
576: } split(/\,/,$ENV{'form.highlight'});
577: }
578: if ($ENV{'form.link'}) {
579: map {
580: my ($anchorname,$linkurl)=split(/\>/,$_);
581: my $matchthis=$anchorname;
582: $matchthis=~s/\_+/\\s\+/g;
583: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
584: } split(/\,/,$ENV{'form.link'});
585: }
586: if ($ENV{'form.anchor'}) {
587: my $anchorname=$ENV{'form.anchor'};
588: my $matchthis=$anchorname;
589: $matchthis=~s/\_+/\\s\+/g;
590: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
591: $result.=(<<"ENDSCRIPT");
592: <script>
593: document.location.hash='$anchorname';
594: </script>
595: ENDSCRIPT
596: }
597: return $result;
598: }
599:
1.79 www 600: sub storefile {
601: my ($file,$contents)=@_;
602: if (my $fh=Apache::File->new('>'.$file)) {
603: print $fh $contents;
604: $fh->close();
605: }
606: }
607:
1.78 www 608: sub inserteditinfo {
609: my ($result,$filecontents)=@_;
610: unless ($filecontents) {
611: $filecontents=(<<SIMPLECONTENT);
612: <html>
613: <head>
614: <title>
615: Title of Document Goes Here
616: </title>
617: </head>
618: <body bgcolor="#FFFFFF">
619:
620: Body of Document Goes Here
621:
622: </body>
623: </html>
624: SIMPLECONTENT
625: }
626: my $editheader='<a href="#editsection">Edit below</a><hr />';
627: my $editfooter=(<<ENDFOOTER);
628: <hr />
629: <a name="editsection" />
630: <form method="post">
631: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
632: <br />
633: <input type="submit" name="savethisfile" value="Save this file" />
634: </form>
635: ENDFOOTER
636: $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
637: $result=~s/(\<\/body\>)/$editfooter/is;
638: return $result;
639: }
640:
1.24 sakharuk 641: sub handler {
642: my $request=shift;
1.68 www 643:
1.64 albertel 644: my $target='web';
1.68 www 645:
1.65 albertel 646: $Apache::lonxml::debug=0;
1.68 www 647:
1.25 sakharuk 648: if ($ENV{'browser.mathml'}) {
1.27 albertel 649: $request->content_type('text/xml');
650: } else {
651: $request->content_type('text/html');
1.25 sakharuk 652: }
1.64 albertel 653:
1.27 albertel 654: $request->send_http_header;
1.64 albertel 655:
1.45 www 656: return OK if $request->header_only;
1.27 albertel 657:
1.79 www 658:
659: my $file=&Apache::lonnet::filelocation("",$request->uri);
1.78 www 660: #
661: # Edit action? Save file.
662: #
663: unless ($ENV{'request.state'} eq 'published') {
664: if ($ENV{'form.savethisfile'}) {
1.79 www 665: &storefile($file,$ENV{'form.filecont'});
1.78 www 666: }
667: }
1.24 sakharuk 668: my %mystyle;
1.50 albertel 669: my $result = '';
670: my $filecontents=&Apache::lonnet::getfile($file);
671: if ($filecontents == -1) {
1.78 www 672: $result=(<<ENDNOTFOUND);
673: <html>
674: <head>
675: <title>File not found</title>
676: </head>
677: <body bgcolor="#FFFFFF">
678: <b>File not found: $file</b>
679: </body>
680: </html>
681: ENDNOTFOUND
1.50 albertel 682: $filecontents='';
683: } else {
684: $result = &Apache::lonxml::xmlparse($target,$filecontents,'',%mystyle);
1.78 www 685: }
686:
687: #
688: # Edit action? Insert editing commands
689: #
690: unless ($ENV{'request.state'} eq 'published') {
691: $result=&inserteditinfo($result,$filecontents);
1.66 www 692: }
1.50 albertel 693:
1.67 www 694: $request->print($result);
1.64 albertel 695:
1.34 www 696: writeallows($request->uri);
1.45 www 697: return OK;
1.24 sakharuk 698: }
699:
1.22 albertel 700: sub debug {
701: if ($Apache::lonxml::debug eq 1) {
1.54 albertel 702: print "DEBUG:".$_[0]."<br />\n";
1.22 albertel 703: }
704: }
1.49 albertel 705:
1.22 albertel 706: sub error {
1.74 albertel 707: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1.55 albertel 708: print "<b>ERROR:</b>".$_[0]."<br />\n";
1.52 albertel 709: } else {
710: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
711: #notify author
712: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},$_[0]);
713: #notify course
714: if ( $ENV{'request.course.id'} ) {
715: my $users=$ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'};
716: foreach my $user (split /\,/, $users) {
717: ($user,my $domain) = split /:/, $user;
1.54 albertel 718: &Apache::lonmsg::user_normal_msg($user,$domain,"Error in $ENV{'request.filename'}",$_[0]);
1.52 albertel 719: }
720: }
1.74 albertel 721:
1.52 albertel 722: #FIXME probably shouldn't have me get everything forever.
1.54 albertel 723: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",$_[0]);
1.74 albertel 724: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1.52 albertel 725: }
1.22 albertel 726: }
1.49 albertel 727:
1.22 albertel 728: sub warning {
1.73 harris41 729: if ($ENV{'request.state'} eq 'construct') {
1.55 albertel 730: print "<b>W</b>ARNING<b>:</b>".$_[0]."<br />\n";
1.73 harris41 731: }
1.22 albertel 732: }
733:
1.74 albertel 734: sub register_insert {
1.75 albertel 735: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1.74 albertel 736: my $i;
1.76 albertel 737: my $tagnum=0;
1.74 albertel 738: my @order;
739: for ($i=0;$i < $#data; $i++) {
740: my $line = $data[$i];
741: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
742: if ( $line =~ /TABLE/ ) { last; }
743: my ($tag,$descrip,$function,$show) = split(/,/, $line);
1.76 albertel 744: $insertlist{"$tagnum.tag"} = $tag;
745: $insertlist{"$tagnum.description"} = $descrip;
746: $insertlist{"$tagnum.function"} = $function;
747: $insertlist{"$tagnum.show"}= $show;
748: $tagnum++;
1.74 albertel 749: }
1.76 albertel 750: $i++; #skipping TABLE line
751: $tagnum = 0;
1.74 albertel 752: for (;$i < $#data;$i++) {
753: my $line = $data[$i];
1.76 albertel 754: my ($mnemonic,@which) = split(/ +/,$line);
755: my $tag = $insertlist{"$tagnum.tag"};
1.74 albertel 756: for (my $j=0;$j <$#which;$j++) {
757: if ( $which[$j] eq 'Y' ) {
1.76 albertel 758: if ($insertlist{"$j.show"} ne 'no') {
759: push(@{ $insertlist{"$tag.which"} },$j);
760: }
1.74 albertel 761: }
762: }
1.76 albertel 763: $tagnum++;
1.74 albertel 764: }
765: }
1.1 sakharuk 766: 1;
767: __END__
1.68 www 768:
769:
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