Annotation of loncom/xml/lonxml.pm, revision 1.90
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
1.89 www 12: # 6/2,6/3,6/8,6/9 Gerd Kortemeyer
1.2 sakharuk 13:
1.4 albertel 14: package Apache::lonxml;
1.33 www 15: use vars
1.76 albertel 16: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace);
1.1 sakharuk 17: use strict;
18: use HTML::TokeParser;
1.3 sakharuk 19: use Safe;
1.40 albertel 20: use Safe::Hole;
1.81 ng 21: use Math::Cephes qw(:trigs :hypers :bessels erf erfc);
1.13 albertel 22: use Opcode;
1.72 albertel 23:
24: sub register {
25: my $space;
26: my @taglist;
27: my $temptag;
28: ($space,@taglist) = @_;
29: foreach $temptag (@taglist) {
30: $Apache::lonxml::alltags{$temptag}=$space;
31: }
32: }
33:
1.46 www 34: use Apache::Constants qw(:common);
1.71 www 35: use Apache::lontexconvert;
1.72 albertel 36: use Apache::style;
37: use Apache::run;
38: use Apache::londefdef;
39: use Apache::scripttag;
40: use Apache::edit;
1.79 www 41: use Apache::lonnet;
42: use Apache::File;
43:
1.72 albertel 44: #================================================== Main subroutine: xmlparse
45: #debugging control, to turn on debugging modify the correct handler
46: $Apache::lonxml::debug=0;
47:
48: #path to the directory containing the file currently being processed
49: @pwd=();
50:
51: #these two are used for capturing a subset of the output for later processing,
52: #don't touch them directly use &startredirection and &endredirection
53: @outputstack = ();
54: $redirection = 0;
55:
56: #controls wheter the <import> tag actually does
57: $import = 1;
58: @extlinks=();
59:
60: # meta mode is a bit weird only some output is to be turned off
61: #<output> tag turns metamode off (defined in londefdef.pm)
62: $metamode = 0;
63:
64: # turns on and of run::evaluate actually derefencing var refs
65: $evaluate = 1;
1.7 albertel 66:
1.74 albertel 67: # data structure for eidt mode, determines what tags can go into what other tags
68: %insertlist=();
1.68 www 69:
1.76 albertel 70: #stores the list of active tag namespaces
71: @namespace=();
72:
1.68 www 73: sub xmlbegin {
74: my $output='';
75: if ($ENV{'browser.mathml'}) {
76: $output='<?xml version="1.0"?>'
77: .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
78: .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
79: .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
80: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
81: .'xmlns="http://www.w3.org/TR/REC-html40">';
82: } else {
83: $output='<html>';
84: }
85: return $output;
86: }
87:
88: sub xmlend {
89: return '</html>';
90: }
91:
1.70 www 92: sub fontsettings() {
93: my $headerstring='';
94: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
95: $headerstring.=
96: '<meta Content-Type="text/html; charset=x-mac-roman">';
97: }
98: return $headerstring;
99: }
100:
1.68 www 101: sub registerurl {
1.86 www 102: if ($ENV{'REQUEST_URI'}!~/^\/(res\/)*adm\//) {
1.87 www 103: my $hwkadd='';
104: if ($ENV{'REQUEST_URI'}=~/\.(problem|exam|quiz|assess|survey|form)$/) {
105: if (&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'})) {
106: $hwkadd.=(<<ENDSUBM);
107: menu.switchbutton
108: (7,1,'subm.gif','view sub','missions',
1.88 www 109: 'gocmd("/adm/grades","submission")');
1.87 www 110: ENDSUBM
111: }
112: if (&Apache::lonnet::allowed('mgr',$ENV{'request.course.id'})) {
113: $hwkadd.=(<<ENDGRDS);
114: menu.switchbutton
115: (7,2,'pgrd.gif','problem','grades',
1.88 www 116: 'gocmd("/adm/grades","viewgrades")');
1.87 www 117: ENDGRDS
118: }
119: if (&Apache::lonnet::allowed('opa',$ENV{'request.course.id'})) {
120: $hwkadd.=(<<ENDPARM);
121: menu.switchbutton
122: (7,3,'pparm.gif','problem','parms',
1.88 www 123: 'gocmd("/adm/parmset","set")');
1.87 www 124: ENDPARM
125: }
126: }
1.86 www 127: return (<<ENDREGTHIS);
1.87 www 128:
1.68 www 129: <script language="JavaScript">
1.71 www 130: // BEGIN LON-CAPA Internal
1.86 www 131:
1.69 www 132: function LONCAPAreg() {
133: menu=window.open("","LONCAPAmenu");
1.86 www 134: menu.clearTimeout(menu.menucltim);
1.69 www 135: menu.currentURL=window.location.pathname;
136: menu.currentStale=0;
1.85 www 137: menu.clearbut(3,1);
138: menu.switchbutton
139: (8,1,'eval.gif','evaluate','this','gopost("/adm/evaluate",currentURL)');
140: menu.switchbutton
141: (8,2,'fdbk.gif','feedback','on this','gopost("/adm/feedback",currentURL)');
142: menu.switchbutton
143: (8,3,'prt.gif','prepare','printout','gopost("/adm/printout",currentURL)');
144: menu.switchbutton
145: (2,1,'back.gif','backward','','gopost("/adm/flip","back:"+currentURL)');
146: menu.switchbutton
147: (2,3,'forw.gif','forward','','gopost("/adm/flip","forward:"+currentURL)');
1.87 www 148: $hwkadd
1.69 www 149: }
1.86 www 150:
1.69 www 151: function LONCAPAstale() {
1.86 www 152: menu=window.open("","LONCAPAmenu");
153: menu.currentStale=1;
154: menu.switchbutton
155: (3,1,'reload.gif','return','location','go(currentURL)');
1.90 ! www 156: menu.clearbut(7,1);
! 157: menu.clearbut(7,2);
! 158: menu.clearbut(7,3);
1.86 www 159: menu.menucltim=menu.setTimeout(
1.90 ! www 160: 'clearbut(2,1);clearbut(2,3);clearbut(8,1);clearbut(8,2);clearbut(8,3);',
1.86 www 161: 2000);
162:
1.87 www 163: }
1.86 www 164:
165: // END LON-CAPA Internal
166: </script>
167: ENDREGTHIS
168:
169: } else {
170: return (<<ENDDONOTREGTHIS);
171:
172: <script language="JavaScript">
173: // BEGIN LON-CAPA Internal
174:
175: function LONCAPAreg() {
1.69 www 176: menu=window.open("","LONCAPAmenu");
177: menu.currentStale=1;
1.85 www 178: menu.clearbut(2,1);
179: menu.clearbut(2,3);
180: menu.clearbut(8,1);
181: menu.clearbut(8,2);
182: menu.clearbut(8,3);
1.86 www 183: if (menu.currentURL) {
184: menu.switchbutton
185: (3,1,'reload.gif','return','location','go(currentURL)');
186: } else {
187: menu.clearbut(3,1);
188: }
189: }
190:
191: function LONCAPAstale() {
1.68 www 192: }
1.86 www 193:
1.71 www 194: // END LON-CAPA Internal
1.68 www 195: </script>
1.86 www 196: ENDDONOTREGTHIS
197:
198: }
1.69 www 199: }
200:
201: sub loadevents() {
202: return 'LONCAPAreg();';
203: }
204:
205: sub unloadevents() {
206: return 'LONCAPAstale();';
1.68 www 207: }
208:
1.48 albertel 209: sub printalltags {
210: my $temp;
211: foreach $temp (sort keys %Apache::lonxml::alltags) {
1.64 albertel 212: &Apache::lonxml::debug("$temp -- $Apache::lonxml::alltags{$temp}");
1.48 albertel 213: }
214: }
1.31 sakharuk 215:
1.3 sakharuk 216: sub xmlparse {
217:
1.18 albertel 218: my ($target,$content_file_string,$safeinit,%style_for_target) = @_;
1.41 albertel 219: if ($target eq 'meta') {
1.59 albertel 220: $Apache::lonxml::redirection = 0;
221: $Apache::lonxml::metamode = 1;
1.72 albertel 222: $Apache::lonxml::evaluate = 1;
1.55 albertel 223: $Apache::lonxml::import = 0;
1.47 albertel 224: } elsif ($target eq 'grade') {
1.55 albertel 225: &startredirection;
1.59 albertel 226: $Apache::lonxml::metamode = 0;
1.72 albertel 227: $Apache::lonxml::evaluate = 1;
1.55 albertel 228: $Apache::lonxml::import = 1;
1.72 albertel 229: } elsif ($target eq 'modified') {
230: $Apache::lonxml::redirection = 0;
231: $Apache::lonxml::metamode = 0;
232: $Apache::lonxml::evaluate = 0;
233: $Apache::lonxml::import = 0;
1.44 albertel 234: } else {
1.72 albertel 235: $Apache::lonxml::redirection = 0;
1.59 albertel 236: $Apache::lonxml::metamode = 0;
1.72 albertel 237: $Apache::lonxml::evaluate = 1;
1.55 albertel 238: $Apache::lonxml::import = 1;
1.32 sakharuk 239: }
1.48 albertel 240: #&printalltags();
1.16 albertel 241: my @pars = ();
1.23 albertel 242: @Apache::lonxml::pwd=();
243: my $pwd=$ENV{'request.filename'};
244: $pwd =~ s:/[^/]*$::;
245: &newparser(\@pars,\$content_file_string,$pwd);
1.3 sakharuk 246: my $currentstring = '';
247: my $finaloutput = '';
248: my $newarg = '';
1.16 albertel 249: my $result;
1.24 sakharuk 250:
1.3 sakharuk 251: my $safeeval = new Safe;
1.40 albertel 252: my $safehole = new Safe::Hole;
1.82 ng 253: &init_safespace($target,$safeeval,$safehole,$safeinit);
1.3 sakharuk 254: #-------------------- Redefinition of the target in the case of compound target
255:
256: ($target, my @tenta) = split('&&',$target);
257:
258: my @stack = ();
259: my @parstack = ();
1.17 albertel 260: &initdepth;
1.3 sakharuk 261: my $token;
1.16 albertel 262: while ( $#pars > -1 ) {
263: while ($token = $pars[$#pars]->get_token) {
1.57 albertel 264: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
1.61 albertel 265: if ($metamode<1) { $result=$token->[1]; }
1.57 albertel 266: } elsif ($token->[0] eq 'PI') {
1.61 albertel 267: if ($metamode<1) { $result=$token->[2]; }
1.16 albertel 268: } elsif ($token->[0] eq 'S') {
269: # add tag to stack
270: push (@stack,$token->[1]);
271: # add parameters list to another stack
272: push (@parstack,&parstring($token));
1.19 albertel 273: &increasedepth($token);
1.16 albertel 274: if (exists $style_for_target{$token->[1]}) {
1.61 albertel 275: if ($Apache::lonxml::redirection) {
1.55 albertel 276: $Apache::lonxml::outputstack['-1'] .=
277: &recurse($style_for_target{$token->[1]},$target,$safeeval,
278: \%style_for_target,@parstack);
1.41 albertel 279: } else {
1.55 albertel 280: $finaloutput .= &recurse($style_for_target{$token->[1]},$target,
281: $safeeval,\%style_for_target,@parstack);
1.41 albertel 282: }
1.16 albertel 283: } else {
1.84 albertel 284: $result = &callsub("start_$token->[1]", $target, $token, \@stack,
285: \@parstack, \@pars, $safeeval, \%style_for_target);
1.16 albertel 286: }
287: } elsif ($token->[0] eq 'E') {
288: #clear out any tags that didn't end
1.55 albertel 289: while ($token->[1] ne $stack[$#stack] && ($#stack > -1)) {
290: &Apache::lonxml::warning("Unbalanced tags in resource $stack['-1']");
1.43 albertel 291: pop @stack;pop @parstack;&decreasedepth($token);
292: }
1.16 albertel 293:
294: if (exists $style_for_target{'/'."$token->[1]"}) {
1.61 albertel 295: if ($Apache::lonxml::redirection) {
1.55 albertel 296: $Apache::lonxml::outputstack['-1'] .=
297: &recurse($style_for_target{'/'."$token->[1]"},
298: $target,$safeeval,\%style_for_target,@parstack);
299: } else {
300: $finaloutput .= &recurse($style_for_target{'/'."$token->[1]"},
301: $target,$safeeval,\%style_for_target,
302: @parstack);
303: }
1.59 albertel 304:
1.16 albertel 305: } else {
1.84 albertel 306: $result = &callsub("end_$token->[1]", $target, $token, \@stack,
307: \@parstack, \@pars,$safeeval, \%style_for_target);
1.13 albertel 308: }
1.57 albertel 309: } else {
310: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
1.16 albertel 311: }
1.55 albertel 312: #evaluate variable refs in result
1.25 sakharuk 313: if ($result ne "") {
1.24 sakharuk 314: if ( $#parstack > -1 ) {
1.55 albertel 315: if ($Apache::lonxml::redirection) {
316: $Apache::lonxml::outputstack['-1'] .=
317: &Apache::run::evaluate($result,$safeeval,$parstack[$#parstack]);
318: } else {
319: $finaloutput .= &Apache::run::evaluate($result,$safeeval,
320: $parstack[$#parstack]);
321: }
1.16 albertel 322: } else {
323: $finaloutput .= &Apache::run::evaluate($result,$safeeval,'');
1.13 albertel 324: }
1.16 albertel 325: $result = '';
1.55 albertel 326: }
327: if ($token->[0] eq 'E') {
328: pop @stack;pop @parstack;&decreasedepth($token);
1.2 sakharuk 329: }
1.5 albertel 330: }
1.16 albertel 331: pop @pars;
1.23 albertel 332: pop @Apache::lonxml::pwd;
1.3 sakharuk 333: }
1.24 sakharuk 334:
1.59 albertel 335: # if ($target eq 'meta') {
336: # $finaloutput.=&endredirection;
337: # }
1.67 www 338:
339: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
340: $finaloutput=&afterburn($finaloutput);
341: }
342:
1.3 sakharuk 343: return $finaloutput;
1.15 albertel 344: }
345:
1.67 www 346:
1.15 albertel 347: sub recurse {
348:
349: my @innerstack = ();
350: my @innerparstack = ();
351: my ($newarg,$target,$safeeval,$style_for_target,@parstack) = @_;
1.16 albertel 352: my @pat = ();
1.23 albertel 353: &newparser(\@pat,\$newarg);
1.15 albertel 354: my $tokenpat;
355: my $partstring = '';
356: my $output='';
1.16 albertel 357: my $decls='';
358: while ( $#pat > -1 ) {
359: while ($tokenpat = $pat[$#pat]->get_token) {
1.57 albertel 360: if (($tokenpat->[0] eq 'T') || ($tokenpat->[0] eq 'C') || ($tokenpat->[0] eq 'D') ) {
1.61 albertel 361: if ($metamode<1) { $partstring=$tokenpat->[1]; }
1.57 albertel 362: } elsif ($tokenpat->[0] eq 'PI') {
1.61 albertel 363: if ($metamode<1) { $partstring=$tokenpat->[2]; }
1.16 albertel 364: } elsif ($tokenpat->[0] eq 'S') {
365: push (@innerstack,$tokenpat->[1]);
366: push (@innerparstack,&parstring($tokenpat));
1.19 albertel 367: &increasedepth($tokenpat);
1.84 albertel 368: $partstring = &callsub("start_$tokenpat->[1]", $target, $tokenpat,
369: \@innerstack, \@innerparstack, \@pat,
370: $safeeval, $style_for_target);
1.16 albertel 371: } elsif ($tokenpat->[0] eq 'E') {
372: #clear out any tags that didn't end
373: while ($tokenpat->[1] ne $innerstack[$#innerstack]
1.43 albertel 374: && ($#innerstack > -1)) {
1.49 albertel 375: &Apache::lonxml::warning("Unbalanced tags in resource $innerstack['-1']");
1.43 albertel 376: pop @innerstack;pop @innerparstack;&decreasedepth($tokenpat);
377: }
1.84 albertel 378: $partstring = &callsub("end_$tokenpat->[1]", $target, $tokenpat,
379: \@innerstack, \@innerparstack, \@pat,
380: $safeeval, $style_for_target);
1.57 albertel 381: } else {
382: &Apache::lonxml::error("Unknown token event :$tokenpat->[0]:$tokenpat->[1]:");
1.16 albertel 383: }
384: #pass both the variable to the style tag, and the tag we
385: #are processing inside the <definedtag>
386: if ( $partstring ne "" ) {
387: if ( $#parstack > -1 ) {
388: if ( $#innerparstack > -1 ) {
389: $decls= $parstack[$#parstack].$innerparstack[$#innerparstack];
390: } else {
391: $decls= $parstack[$#parstack];
392: }
393: } else {
394: if ( $#innerparstack > -1 ) {
395: $decls=$innerparstack[$#innerparstack];
396: } else {
397: $decls='';
398: }
399: }
400: $output .= &Apache::run::evaluate($partstring,$safeeval,$decls);
401: $partstring = '';
402: }
1.17 albertel 403: if ($tokenpat->[0] eq 'E') { pop @innerstack;pop @innerparstack;
1.19 albertel 404: &decreasedepth($tokenpat);}
1.15 albertel 405: }
1.16 albertel 406: pop @pat;
1.23 albertel 407: pop @Apache::lonxml::pwd;
1.15 albertel 408: }
409: return $output;
1.7 albertel 410: }
411:
412: sub callsub {
1.84 albertel 413: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.7 albertel 414: my $currentstring='';
1.72 albertel 415: my $nodefault;
1.7 albertel 416: {
1.59 albertel 417: my $sub1;
1.7 albertel 418: no strict 'refs';
1.59 albertel 419: if ($target eq 'edit' && $token->[0] eq 'S') {
1.84 albertel 420: $currentstring = &Apache::edit::tag_start($target,$token,$tagstack,
421: $parstack,$parser,
1.59 albertel 422: $safeeval,$style);
423: }
1.68 www 424: my $tag=$token->[1];
425: my $space=$Apache::lonxml::alltags{$tag};
426: if (!$space) {
427: $tag=~tr/A-Z/a-z/;
428: $sub=~tr/A-Z/a-z/;
429: $space=$Apache::lonxml::alltags{$tag}
430: }
431: if ($space) {
1.72 albertel 432: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode<br />\n");
1.24 sakharuk 433: $sub1="$space\:\:$sub";
1.17 albertel 434: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
1.84 albertel 435: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
436: $parstack,$parser,$safeeval,
437: $style);
1.7 albertel 438: } else {
1.72 albertel 439: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode<br />\n");
1.62 sakharuk 440: if ($metamode <1) {
441: if (defined($token->[4]) && ($metamode < 1)) {
1.72 albertel 442: $currentstring = $token->[4];
1.62 sakharuk 443: } else {
1.72 albertel 444: $currentstring = $token->[2];
1.62 sakharuk 445: }
1.7 albertel 446: }
1.59 albertel 447: }
1.83 albertel 448: # &Apache::lonxml::debug("nodefalt:$nodefault:");
1.72 albertel 449: if ($currentstring eq '' && $nodefault eq '') {
450: if ($target eq 'edit') {
1.74 albertel 451: &Apache::lonxml::debug("doing default edit for $token->[1]");
1.72 albertel 452: if ($token->[0] eq 'S') {
1.74 albertel 453: $currentstring = &Apache::edit::tag_start($target,$token);
1.72 albertel 454: } elsif ($token->[0] eq 'E') {
1.74 albertel 455: $currentstring = &Apache::edit::tag_end($target,$token);
1.72 albertel 456: }
457: } elsif ($target eq 'modified') {
458: if ($token->[0] eq 'S') {
459: $currentstring = $token->[4];
1.76 albertel 460: $currentstring.=&Apache::edit::handle_insert();
1.72 albertel 461: } else {
462: $currentstring = $token->[2];
463: }
464: }
1.7 albertel 465: }
466: use strict 'refs';
467: }
468: return $currentstring;
1.82 ng 469: }
470:
471: sub init_safespace {
472: my ($target,$safeeval,$safehole,$safeinit) = @_;
473: $safeeval->permit("entereval");
474: $safeeval->permit(":base_math");
475: $safeeval->permit("sort");
476: $safeeval->deny(":base_io");
477: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
478:
479: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
480: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
481: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
482: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
483: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
484: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
485: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
486: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
487: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
488: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
489: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
490: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
491: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
492: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
493: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
494: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
495: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
496: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
497: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
498:
499: #need to inspect this class of ops
500: # $safeeval->deny(":base_orig");
501: $safeinit .= ';$external::target='.$target.';';
502: $safeinit .= ';$external::randomseed='.&Apache::lonnet::rndseed().';';
503: &Apache::run::run($safeinit,$safeeval);
1.17 albertel 504: }
505:
1.55 albertel 506: sub startredirection {
507: $Apache::lonxml::redirection++;
508: push (@Apache::lonxml::outputstack, '');
509: }
510:
511: sub endredirection {
512: if (!$Apache::lonxml::redirection) {
1.72 albertel 513: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
1.55 albertel 514: return '';
515: }
516: $Apache::lonxml::redirection--;
517: pop @Apache::lonxml::outputstack;
518: }
519:
1.17 albertel 520: sub initdepth {
521: @Apache::lonxml::depthcounter=();
522: $Apache::lonxml::depth=-1;
523: $Apache::lonxml::olddepth=-1;
524: }
525:
526: sub increasedepth {
1.19 albertel 527: my ($token) = @_;
1.17 albertel 528: $Apache::lonxml::depth++;
529: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
530: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
531: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
532: }
1.42 albertel 533: my $curdepth=join('_',@Apache::lonxml::depthcounter);
1.64 albertel 534: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
1.54 albertel 535: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
1.17 albertel 536: }
537:
538: sub decreasedepth {
1.19 albertel 539: my ($token) = @_;
1.17 albertel 540: $Apache::lonxml::depth--;
1.36 albertel 541: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
542: $#Apache::lonxml::depthcounter--;
543: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
544: }
1.43 albertel 545: if ( $Apache::lonxml::depth < -1) {
1.49 albertel 546: &Apache::lonxml::warning("Unbalanced tags in resource");
1.43 albertel 547: $Apache::lonxml::depth='-1';
548: }
1.42 albertel 549: my $curdepth=join('_',@Apache::lonxml::depthcounter);
1.64 albertel 550: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
1.54 albertel 551: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
1.1 sakharuk 552: }
1.19 albertel 553:
554: sub get_all_text {
555:
556: my($tag,$pars)= @_;
557: my $depth=0;
558: my $token;
559: my $result='';
1.57 albertel 560: if ( $tag =~ m:^/: ) {
561: my $tag=substr($tag,1);
562: # &Apache::lonxml::debug("have:$tag:");
563: while (($depth >=0) && ($token = $pars->get_token)) {
564: # &Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]");
565: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
566: $result.=$token->[1];
567: } elsif ($token->[0] eq 'PI') {
568: $result.=$token->[2];
569: } elsif ($token->[0] eq 'S') {
570: if ($token->[1] eq $tag) { $depth++; }
571: $result.=$token->[4];
572: } elsif ($token->[0] eq 'E') {
573: if ( $token->[1] eq $tag) { $depth--; }
574: #skip sending back the last end tag
575: if ($depth > -1) { $result.=$token->[2]; } else {
576: $pars->unget_token($token);
577: }
578: }
579: }
580: } else {
581: while ($token = $pars->get_token) {
582: # &Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
583: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
584: $result.=$token->[1];
585: } elsif ($token->[0] eq 'PI') {
586: $result.=$token->[2];
587: } elsif ($token->[0] eq 'S') {
588: if ( $token->[1] eq $tag) {
589: $pars->unget_token($token); last;
590: } else {
591: $result.=$token->[4];
592: }
593: } elsif ($token->[0] eq 'E') {
594: $result.=$token->[2];
1.36 albertel 595: }
1.19 albertel 596: }
597: }
1.49 albertel 598: # &Apache::lonxml::debug("Exit:$result:");
1.19 albertel 599: return $result
600: }
601:
1.23 albertel 602: sub newparser {
603: my ($parser,$contentref,$dir) = @_;
604: push (@$parser,HTML::TokeParser->new($contentref));
1.56 albertel 605: $$parser['-1']->xml_mode('1');
1.23 albertel 606: if ( $dir eq '' ) {
607: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
608: } else {
609: push (@Apache::lonxml::pwd, $dir);
610: }
611: # &Apache::lonxml::debug("pwd:$#Apache::lonxml::pwd");
612: # &Apache::lonxml::debug("pwd:$Apache::lonxml::pwd[$#Apache::lonxml::pwd]");
613: }
1.1 sakharuk 614:
1.8 albertel 615: sub parstring {
616: my ($token) = @_;
617: my $temp='';
1.20 albertel 618: map {
1.35 www 619: unless ($_=~/\W/) {
1.42 albertel 620: my $val=$token->[2]->{$_};
1.53 albertel 621: $val =~ s/([\%\@\\])/\\$1/g;
1.51 albertel 622: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1.42 albertel 623: $temp .= "my \$$_=\"$val\";"
1.20 albertel 624: }
625: } @{$token->[3]};
1.8 albertel 626: return $temp;
627: }
1.22 albertel 628:
1.34 www 629: sub writeallows {
630: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
631: my $thisdir=$thisurl;
632: $thisdir=~s/\/[^\/]+$//;
633: my %httpref=();
634: map {
635: $httpref{'httpref.'.
636: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl; } @extlinks;
637: &Apache::lonnet::appenv(%httpref);
638: }
639:
1.66 www 640: #
641: # Afterburner handles anchors, highlights and links
642: #
643: sub afterburn {
644: my $result=shift;
645: map {
646: my ($name, $value) = split(/=/,$_);
647: $value =~ tr/+/ /;
648: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
649: if (($name eq 'highlight')||($name eq 'anchor')||($name eq 'link')) {
650: unless ($ENV{'form.'.$name}) {
651: $ENV{'form.'.$name}=$value;
652: }
653: }
654: } (split(/&/,$ENV{'QUERY_STRING'}));
655: if ($ENV{'form.highlight'}) {
656: map {
657: my $anchorname=$_;
658: my $matchthis=$anchorname;
659: $matchthis=~s/\_+/\\s\+/g;
660: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
661: } split(/\,/,$ENV{'form.highlight'});
662: }
663: if ($ENV{'form.link'}) {
664: map {
665: my ($anchorname,$linkurl)=split(/\>/,$_);
666: my $matchthis=$anchorname;
667: $matchthis=~s/\_+/\\s\+/g;
668: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
669: } split(/\,/,$ENV{'form.link'});
670: }
671: if ($ENV{'form.anchor'}) {
672: my $anchorname=$ENV{'form.anchor'};
673: my $matchthis=$anchorname;
674: $matchthis=~s/\_+/\\s\+/g;
675: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
676: $result.=(<<"ENDSCRIPT");
677: <script>
678: document.location.hash='$anchorname';
679: </script>
680: ENDSCRIPT
681: }
682: return $result;
683: }
684:
1.79 www 685: sub storefile {
686: my ($file,$contents)=@_;
687: if (my $fh=Apache::File->new('>'.$file)) {
688: print $fh $contents;
689: $fh->close();
690: }
691: }
692:
1.78 www 693: sub inserteditinfo {
694: my ($result,$filecontents)=@_;
695: unless ($filecontents) {
696: $filecontents=(<<SIMPLECONTENT);
697: <html>
698: <head>
699: <title>
700: Title of Document Goes Here
701: </title>
702: </head>
703: <body bgcolor="#FFFFFF">
704:
705: Body of Document Goes Here
706:
707: </body>
708: </html>
709: SIMPLECONTENT
710: }
711: my $editheader='<a href="#editsection">Edit below</a><hr />';
712: my $editfooter=(<<ENDFOOTER);
713: <hr />
714: <a name="editsection" />
715: <form method="post">
716: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
717: <br />
718: <input type="submit" name="savethisfile" value="Save this file" />
719: </form>
720: ENDFOOTER
721: $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
722: $result=~s/(\<\/body\>)/$editfooter/is;
723: return $result;
724: }
725:
1.24 sakharuk 726: sub handler {
727: my $request=shift;
1.68 www 728:
1.64 albertel 729: my $target='web';
1.68 www 730:
1.65 albertel 731: $Apache::lonxml::debug=0;
1.68 www 732:
1.25 sakharuk 733: if ($ENV{'browser.mathml'}) {
1.27 albertel 734: $request->content_type('text/xml');
735: } else {
736: $request->content_type('text/html');
1.25 sakharuk 737: }
1.64 albertel 738:
1.27 albertel 739: $request->send_http_header;
1.64 albertel 740:
1.45 www 741: return OK if $request->header_only;
1.27 albertel 742:
1.79 www 743:
744: my $file=&Apache::lonnet::filelocation("",$request->uri);
1.78 www 745: #
746: # Edit action? Save file.
747: #
748: unless ($ENV{'request.state'} eq 'published') {
749: if ($ENV{'form.savethisfile'}) {
1.79 www 750: &storefile($file,$ENV{'form.filecont'});
1.78 www 751: }
752: }
1.24 sakharuk 753: my %mystyle;
1.50 albertel 754: my $result = '';
755: my $filecontents=&Apache::lonnet::getfile($file);
756: if ($filecontents == -1) {
1.78 www 757: $result=(<<ENDNOTFOUND);
758: <html>
759: <head>
760: <title>File not found</title>
761: </head>
762: <body bgcolor="#FFFFFF">
763: <b>File not found: $file</b>
764: </body>
765: </html>
766: ENDNOTFOUND
1.50 albertel 767: $filecontents='';
768: } else {
769: $result = &Apache::lonxml::xmlparse($target,$filecontents,'',%mystyle);
1.78 www 770: }
771:
772: #
773: # Edit action? Insert editing commands
774: #
775: unless ($ENV{'request.state'} eq 'published') {
776: $result=&inserteditinfo($result,$filecontents);
1.66 www 777: }
1.50 albertel 778:
1.67 www 779: $request->print($result);
1.64 albertel 780:
1.34 www 781: writeallows($request->uri);
1.45 www 782: return OK;
1.24 sakharuk 783: }
784:
1.22 albertel 785: sub debug {
786: if ($Apache::lonxml::debug eq 1) {
1.54 albertel 787: print "DEBUG:".$_[0]."<br />\n";
1.22 albertel 788: }
789: }
1.49 albertel 790:
1.22 albertel 791: sub error {
1.74 albertel 792: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1.55 albertel 793: print "<b>ERROR:</b>".$_[0]."<br />\n";
1.52 albertel 794: } else {
795: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
796: #notify author
797: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},$_[0]);
798: #notify course
799: if ( $ENV{'request.course.id'} ) {
800: my $users=$ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'};
801: foreach my $user (split /\,/, $users) {
802: ($user,my $domain) = split /:/, $user;
1.54 albertel 803: &Apache::lonmsg::user_normal_msg($user,$domain,"Error in $ENV{'request.filename'}",$_[0]);
1.52 albertel 804: }
805: }
1.74 albertel 806:
1.52 albertel 807: #FIXME probably shouldn't have me get everything forever.
1.54 albertel 808: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",$_[0]);
1.74 albertel 809: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1.52 albertel 810: }
1.22 albertel 811: }
1.49 albertel 812:
1.22 albertel 813: sub warning {
1.73 harris41 814: if ($ENV{'request.state'} eq 'construct') {
1.55 albertel 815: print "<b>W</b>ARNING<b>:</b>".$_[0]."<br />\n";
1.73 harris41 816: }
1.83 albertel 817: }
818:
819: sub get_param {
820: my ($param,$parstack,$safeeval,$context) = @_;
821: if ( ! $context ) { $context = -1; }
822: my $args ='';
823: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
824: return &Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1.22 albertel 825: }
826:
1.74 albertel 827: sub register_insert {
1.75 albertel 828: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1.74 albertel 829: my $i;
1.76 albertel 830: my $tagnum=0;
1.74 albertel 831: my @order;
832: for ($i=0;$i < $#data; $i++) {
833: my $line = $data[$i];
834: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
835: if ( $line =~ /TABLE/ ) { last; }
836: my ($tag,$descrip,$function,$show) = split(/,/, $line);
1.76 albertel 837: $insertlist{"$tagnum.tag"} = $tag;
838: $insertlist{"$tagnum.description"} = $descrip;
839: $insertlist{"$tagnum.function"} = $function;
840: $insertlist{"$tagnum.show"}= $show;
841: $tagnum++;
1.74 albertel 842: }
1.76 albertel 843: $i++; #skipping TABLE line
844: $tagnum = 0;
1.74 albertel 845: for (;$i < $#data;$i++) {
846: my $line = $data[$i];
1.76 albertel 847: my ($mnemonic,@which) = split(/ +/,$line);
848: my $tag = $insertlist{"$tagnum.tag"};
1.74 albertel 849: for (my $j=0;$j <$#which;$j++) {
850: if ( $which[$j] eq 'Y' ) {
1.76 albertel 851: if ($insertlist{"$j.show"} ne 'no') {
852: push(@{ $insertlist{"$tag.which"} },$j);
853: }
1.74 albertel 854: }
855: }
1.76 albertel 856: $tagnum++;
1.74 albertel 857: }
858: }
1.1 sakharuk 859: 1;
860: __END__
1.68 www 861:
862:
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