1: #
2: # The LearningOnline Network with CAPA
3: # image click response style
4: #
5: # $Id: imageresponse.pm,v 1.100 2010/12/19 01:08:11 raeburn Exp $
6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27: # http://www.lon-capa.org/
28: #
29: #FIXME LATER assumes multiple possible submissions but only one is possible
30: #currently
31:
32:
33: =head1 NAME
34:
35: Apache::imageresponse
36:
37: =head1 SYNOPSIS
38:
39: Coordinates the response to clicking an image.
40:
41: This is part of the LearningOnline Network with CAPA project
42: described at http://www.lon-capa.org.
43:
44: =head1 SUBROUTINES
45:
46: =over
47:
48: =item start_imageresponse()
49:
50: =item end_imageresponse()
51:
52: =item start_foilgroup()
53:
54: =item getfoilcounts()
55:
56: =item whichfoils()
57:
58: =item prep_image()
59:
60: =item draw_image()
61:
62: =item displayfoils()
63:
64: =item format_prior_response()
65:
66: =item display_answers()
67:
68: =item clean_up_image()
69:
70: =item gradefoils()
71:
72: =item stringify_submission()
73:
74: =item get_submission()
75:
76: =item end_foilgroup()
77:
78: =item start_conceptgroup()
79:
80: =item end_conceptgroup()
81:
82: =item insert_foil()
83:
84: =item start_foil()
85:
86: =item end_foil()
87:
88: =item start_text()
89:
90: =item end_text()
91:
92: =item start_image()
93:
94: =item end_image()
95:
96: =item start_rectangle()
97:
98: =item grade_rectangle()
99:
100: =item end_rectangle()
101:
102: =item start_polygon()
103:
104: =item grade_polygon()
105:
106: =item end_polygon()
107:
108: =back
109:
110: =cut
111:
112:
113: package Apache::imageresponse;
114: use strict;
115: use Image::Magick();
116: use Apache::randomlylabel();
117: use Apache::londefdef();
118: use Apache::Constants qw(:common :http);
119: use Apache::lonlocal;
120: use Apache::lonnet;
121: use lib '/home/httpd/lib/perl/';
122: use LONCAPA;
123:
124:
125: BEGIN {
126: &Apache::lonxml::register('Apache::imageresponse',('imageresponse'));
127: }
128:
129: sub start_imageresponse {
130: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
131: my $result;
132: #when in a radiobutton response use these
133: &Apache::lonxml::register('Apache::imageresponse',
134: ('foilgroup','foil','text','image','rectangle',
135: 'polygon','conceptgroup'));
136: push (@Apache::lonxml::namespace,'imageresponse');
137: my $id = &Apache::response::start_response($parstack,$safeeval);
138: undef(%Apache::response::foilnames);
139: if ($target eq 'meta') {
140: $result=&Apache::response::meta_package_write('imageresponse');
141: } elsif ($target eq 'analyze') {
142: my $part_id="$Apache::inputtags::part.$id";
143: $Apache::lonhomework::analyze{"$part_id.type"} = 'imageresponse';
144: push (@{ $Apache::lonhomework::analyze{"parts"} },$part_id);
145: push (@{ $Apache::lonhomework::analyze{"$part_id.bubble_lines"} },
146: 1);
147: } elsif ( $target eq 'edit' ) {
148: $result .= &Apache::edit::tag_start($target,$token).
149: &Apache::edit::text_arg('Max Number Of Shown Foils:',
150: 'max',$token,'4').
151: &Apache::edit::end_row().
152: &Apache::edit::start_spanning_row();
153: } elsif ( $target eq 'modified' ) {
154: my $constructtag=
155: &Apache::edit::get_new_args($token,$parstack,$safeeval,'max');
156: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
157: }
158: return $result;
159: }
160:
161: sub end_imageresponse {
162: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
163:
164: my $part_id = $Apache::inputtags::part;
165: my $response_id = $Apache::inputtags::response[-1];
166:
167: pop(@Apache::lonxml::namespace);
168: &Apache::lonxml::deregister('Apache::imageresponse',('foilgroup','foil','text','image','rectangle','conceptgroup'));
169:
170: my $result;
171: if ($target eq 'edit') {
172: $result=&Apache::edit::end_table();
173: } elsif ($target eq 'tex'
174: && $Apache::lonhomework::type eq 'exam') {
175: $result=&Apache::inputtags::exam_score_line($target);
176: }
177:
178: undef(%Apache::response::foilnames);
179:
180: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
181: $target eq 'tex' || $target eq 'analyze') {
182: &Apache::lonxml::increment_counter(&Apache::response::repetition(),
183: "$part_id.$response_id");
184: if ($target eq 'analyze') {
185: &Apache::lonhomework::set_bubble_lines();
186: }
187:
188: }
189: &Apache::response::end_response();
190: return $result;
191: }
192:
193: %Apache::response::foilgroup=();
194: sub start_foilgroup {
195: my ($target) = @_;
196: %Apache::response::foilgroup=();
197: $Apache::imageresponse::conceptgroup=0;
198: &Apache::response::pushrandomnumber(undef,$target);
199: return '';
200: }
201:
202: sub getfoilcounts {
203: my ($parstack,$safeeval)=@_;
204:
205: my $max = &Apache::lonxml::get_param('max',$parstack,$safeeval,'-2');
206: # +1 since instructors will count from 1
207: my $count = $#{ $Apache::response::foilgroup{'names'} }+1;
208: if (&Apache::response::showallfoils()) { $max=$count; }
209: return ($count,$max);
210: }
211:
212: sub whichfoils {
213: my ($max)=@_;
214: return if (!defined(@{ $Apache::response::foilgroup{'names'} }));
215: my @names = @{ $Apache::response::foilgroup{'names'} };
216: my @whichopt;
217: while ((($#whichopt+1) < $max) && ($#names > -1)) {
218: &Apache::lonxml::debug("Have $#whichopt max is $max");
219: my $aopt;
220: if (&Apache::response::showallfoils()) {
221: $aopt=0;
222: } else {
223: $aopt=int(&Math::Random::random_uniform() * ($#names+1));
224: }
225: &Apache::lonxml::debug("From $#names elms, picking $aopt");
226: $aopt=splice(@names,$aopt,1);
227: &Apache::lonxml::debug("Picked $aopt");
228: push(@whichopt,$aopt);
229: }
230: return @whichopt;
231: }
232:
233: sub prep_image {
234: my ($image,$mode,$name)=@_;
235:
236: my ($x,$y)= &get_submission($name);
237: &Apache::lonxml::debug("for $name drawing click at $x and $y");
238: &draw_image($mode,$image,$x,$y,$Apache::response::foilgroup{"$name.area"});
239: }
240:
241: sub draw_image {
242: my ($mode,$image,$x,$y,$areas) = @_;
243:
244: my $id=&Apache::loncommon::get_cgi_id();
245:
246: my (%x,$i);
247: $x{"cgi.$id.BGIMG"}=&escape($image);
248:
249: #draws 2 xs on the image at the clicked location
250: #one in white and then one in red on top of the one in white
251:
252: if (defined($x) && $x =~/\S/
253: && defined($y) && $y =~/\S/
254: && ($mode eq 'submission' || !&Apache::response::show_answer())
255: && $mode ne 'answeronly') {
256: my $length = 6;
257: my $width = 1;
258: my $extrawidth = 2;
259: my $xmin=($x-$length);
260: my $xmax=($x+$length);
261: my $ymin=($y-$length);
262: my $ymax=($y+$length);
263:
264: $x{"cgi.$id.OBJTYPE"}.='LINE:';
265: $i=$x{"cgi.$id.OBJCOUNT"}++;
266: $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymin),($xmax),($ymax),
267: "FFFFFF",($width+$extrawidth)));
268: $x{"cgi.$id.OBJTYPE"}.='LINE:';
269: $i=$x{"cgi.$id.OBJCOUNT"}++;
270: $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymax),($xmax),($ymin),
271: "FFFFFF",($width+$extrawidth)));
272: $x{"cgi.$id.OBJTYPE"}.='LINE:';
273: $i=$x{"cgi.$id.OBJCOUNT"}++;
274: $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymin),($xmax),($ymax),
275: "FF0000",($width)));
276: $x{"cgi.$id.OBJTYPE"}.='LINE:';
277: $i=$x{"cgi.$id.OBJCOUNT"}++;
278: $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymax),($xmax),($ymin),
279: "FF0000",($width)));
280: }
281: if ($mode eq 'answer' || $mode eq 'answeronly') {
282: my $width = 1;
283: my $extrawidth = 2;
284: foreach my $area (@{ $areas }) {
285: if ($area=~/^rectangle:/) {
286: $x{"cgi.$id.OBJTYPE"}.='RECTANGLE:';
287: $i=$x{"cgi.$id.OBJCOUNT"}++;
288: my ($x1,$y1,$x2,$y2)=
289: ($area=~m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/);
290: $x{"cgi.$id.OBJ$i"}=join(':',($x1,$y1,$x2,$y2,"FFFFFF",
291: ($width+$extrawidth)));
292: $x{"cgi.$id.OBJTYPE"}.='RECTANGLE:';
293: $i=$x{"cgi.$id.OBJCOUNT"}++;
294: $x{"cgi.$id.OBJ$i"}=join(':',($x1,$y1,$x2,$y2,"00FF00",$width));
295: } elsif ($area=~/^polygon:(.*)/) {
296: $x{"cgi.$id.OBJTYPE"}.='POLYGON:';
297: $i=$x{"cgi.$id.OBJCOUNT"}++;
298: $x{"cgi.$id.OBJ$i"}=join(':',("FFFFFF",($width+$extrawidth)));
299: $x{"cgi.$id.OBJEXTRA$i"}=$1;
300: $x{"cgi.$id.OBJTYPE"}.='POLYGON:';
301: $i=$x{"cgi.$id.OBJCOUNT"}++;
302: $x{"cgi.$id.OBJ$i"}=join(':',("00FF00",$width));
303: $x{"cgi.$id.OBJEXTRA$i"}=$1;
304: }
305: }
306: }
307: &Apache::lonnet::appenv(\%x);
308: return $id;
309: }
310:
311: sub displayfoils {
312: my ($target,@whichopt) = @_;
313: my $result ='';
314: my $temp=1;
315: my @images;
316: foreach my $name (@whichopt) {
317: $result.=$Apache::response::foilgroup{"$name.text"};
318: &Apache::lonxml::debug("Text is $result");
319: if ($target eq 'tex') {$result.="\\vskip 0 mm \n";} else {$result.="<br />\n";}
320: my $image=$Apache::response::foilgroup{"$name.image"};
321: &Apache::lonxml::debug("image is $image");
322: if ( ($target eq 'web' || $target eq 'answer')
323: && $image !~ /^https?\:/ ) {
324: $image=&clean_up_image($image);
325: }
326: push(@images,$image);
327: &Apache::lonxml::debug("image is $image");
328: if ( &Apache::response::show_answer() ) {
329: if ($target eq 'tex') {
330: $result.=$Apache::response::foilgroup{"$name.image"}."\\vskip 0 mm \n";
331: } else {
332: my $token=&prep_image($image,'answer',$name);
333: $result.="<img src=\"/adm/randomlabel.png?token=$token\" /><br />\n";
334: }
335: } else {
336: if ($target eq 'tex') {
337: $result.=$Apache::response::foilgroup{"$name.image"}."\\vskip 0 mm \n";
338: } else {
339: my $respid=$Apache::inputtags::response['-1'];
340: my $token=&prep_image($image,'submission',$name);
341: my $input_id = "HWVAL_$respid:$temp";
342: my $id = $env{'form.request.prefix'}.$input_id;
343: $result.='<img onclick="image_response_click(\''.$id.'\',event);"
344: src="/adm/randomlabel.png?token='.$token.'"
345: id="'.$id.'_imageresponse"
346: />'.
347: '<br />'.
348: '<input type="hidden" name="'.$input_id.'_token" value="'.$token.'" />'.
349: '<input type="hidden" name="'.$input_id.'" value="'.
350: join(':',&get_submission($name)).'" />';
351: }
352: }
353: $temp++;
354: }
355: if ($target eq 'web') {
356: &get_prior_options(\@images,\@whichopt);
357: }
358: return $result;
359: }
360:
361: sub get_prior_options {
362: my ($currimages,$curropt) = @_;
363: return unless((ref($curropt) eq 'ARRAY') &&
364: (ref($currimages) eq 'ARRAY'));
365: my $part = $Apache::inputtags::part;
366: my $respid = $Apache::inputtags::response[-1];
367: foreach my $i (1..$Apache::lonhomework::history{'version'}) {
368: my $partprefix = "$i:resource.$part";
369: my $sub_key = "$partprefix.$respid.submission";
370: next if (!exists($Apache::lonhomework::history{$sub_key}));
371: my $type_key = "$partprefix.type";
372: my @whichopt = ();
373: my @images = ();
374: if ($Apache::lonhomework::history{$type_key} eq 'randomizetry') {
375: my $order_key = "$partprefix.$respid.foilorder";
376: @whichopt = &Apache::lonnet::str2array($Apache::lonhomework::history{$order_key});
377: if (@whichopt > 0) {
378: foreach my $name (@whichopt) {
379: my $image=$Apache::response::foilgroup{"$name.image"};
380: if ($image !~ /^https?\:/ ) {
381: $image=&clean_up_image($image);
382: }
383: push(@images,$image);
384: }
385: }
386: } else {
387: @whichopt = @{$curropt};
388: @images = @{$currimages};
389: }
390: my $submission = $Apache::lonhomework::history{$sub_key};
391: my $output = &format_prior_response('grade',$submission,
392: [\@images,\@whichopt]);
393: if (defined($output)) {
394: $Apache::inputtags::submission_display{$sub_key} = $output;
395: }
396: }
397: }
398:
399: sub format_prior_response {
400: my ($mode,$answer,$other_data) = @_;
401:
402: my $result;
403:
404: # make a copy of the data in the refs
405: my @images = @{ $other_data->[0] };
406: my @foils = @{ $other_data->[1] };
407: foreach my $name (@foils) {
408: my $image = pop(@images);
409: my ($x,$y) = &get_submission($name,$answer);
410: my $token = &draw_image('submission',$image,$x,$y);
411: $result .=
412: '<img class="LC_prior_image"
413: src="/adm/randomlabel.png?token='.$token.'" /><br />';
414: }
415: return $result;
416: }
417:
418: sub display_answers {
419: my ($target,$whichopt)=@_;
420:
421: my $result=&Apache::response::answer_header('imageresponse');
422: foreach my $name (@$whichopt) {
423: my $image=$Apache::response::foilgroup{"$name.image"};
424: &Apache::lonxml::debug("image is $image");
425: if ( ($target eq 'web' || $target eq 'answer')
426: && $image !~ /^https?\:/ ) {
427: $image = &clean_up_image($image);
428: }
429: my $token=&prep_image($image,'answeronly',$name);
430:
431: $result.=&Apache::response::answer_part('imageresponse',"<img src=\"/adm/randomlabel.png?token=$token\" /><br />\n");
432: }
433: $result.=&Apache::response::answer_footer('imageresponse');
434: return $result;
435: }
436:
437: sub clean_up_image {
438: my ($image)=@_;
439: if ($image =~ /\s*<img\s*/) {
440: ($image) = ($image =~ /src\s*=\s*[\"\']([^\"\']+)[\"\']/i);
441: if ($image !~ /^https?\:/) {
442: $image=&Apache::lonnet::hreflocation('',$image);
443: }
444: if (!$image) {
445: $image='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';
446: }
447: } else {
448: $image=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$image);
449: &Apache::lonxml::debug("repcopying: $image");
450: if (&Apache::lonnet::repcopy($image) ne 'ok') {
451: $image='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';
452: }
453: }
454: return $image;
455: }
456:
457: sub gradefoils {
458: my (@whichopt) = @_;
459:
460: my $partid = $Apache::inputtags::part;
461: my $id = $Apache::inputtags::response['-1'];
462:
463: if ($Apache::lonhomework::type eq 'exam') {
464: &Apache::response::scored_response($partid,$id);
465: return;
466: }
467:
468: my @results;
469: my $temp=1;
470: my %response;
471: foreach my $name (@whichopt) {
472: my ($x,$y) = split(':',$env{"form.HWVAL_$id:$temp"});
473: $response{$name} = $env{"form.HWVAL_$id:$temp"};
474: &Apache::lonxml::debug("Got a x of $x and a y of $y for $name");
475: if (defined($x) && defined($y) &&
476: defined(@{ $Apache::response::foilgroup{"$name.area"} })) {
477: my @areas = @{ $Apache::response::foilgroup{"$name.area"} };
478: my $grade="INCORRECT";
479: foreach my $area (@areas) {
480: &Apache::lonxml::debug("Area is $area for $name");
481: $area =~ m/([a-z]*):/;
482: &Apache::lonxml::debug("Area of type $1");
483: if ($1 eq 'rectangle') {
484: $grade=&grade_rectangle($area,$x,$y);
485: } elsif ($1 eq 'polygon') {
486: $grade=&grade_polygon($area,$x,$y);
487: } else {
488: &Apache::lonxml::error(&mt('Unknown area style [_1]',$area));
489: }
490: &Apache::lonxml::debug("Area said $grade");
491: if ($grade eq 'APPROX_ANS') { last; }
492: }
493: &Apache::lonxml::debug("Foil was $grade");
494: push(@results, $grade)
495: } else {
496: push(@results, 'MISSING_ANSWER')
497: }
498: $temp++;
499: }
500: if ($Apache::lonhomework::type eq 'randomizetry') {
501: $Apache::lonhomework::results{"resource.$partid.$id.foilorder"} = &Apache::lonnet::array2str(@whichopt);
502: }
503: my ($result) = &Apache::inputtags::finalizeawards(\@results,[]);
504: &Apache::lonxml::debug("Question is $result");
505:
506: my $part=$Apache::inputtags::part;
507: my %previous=
508: &Apache::response::check_for_previous(&stringify_submission(\%response),
509: $part,$id);
510: if ($result) {
511: if ($Apache::lonhomework::type eq 'survey') {
512: $result='SUBMITTED';
513: } elsif ($Apache::lonhomework::type eq 'surveycred') {
514: $result='SUBMITTED_CREDIT';
515: } elsif ($Apache::lonhomework::type eq 'anonsurvey') {
516: $result='ANONYMOUS';
517: } elsif ($Apache::lonhomework::type eq 'anonsurveycred') {
518: $result='ANONYMOUS_CREDIT';
519: }
520: }
521:
522: &Apache::response::handle_previous(\%previous,$result);
523: $Apache::lonhomework::results{"resource.$part.$id.submission"}=
524: &stringify_submission(\%response);
525: $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=$result;
526: return;
527: }
528:
529: sub stringify_submission {
530: my ($response) = @_;
531: return &Apache::lonnet::hash2str(%{ $response });
532: }
533:
534: sub get_submission {
535: my ($name,$string) = @_;
536:
537: if (!defined($string)) {
538: my $part=$Apache::inputtags::part;
539: my $respid=$Apache::inputtags::response['-1'];
540: $string =
541: $Apache::lonhomework::history{"resource.$part.$respid.submission"};
542: }
543:
544: if ($string !~ /=/) {
545: return split(':',$string);
546: } else {
547: my %response = &Apache::lonnet::str2hash($string);
548: return split(':',$response{$name});
549: }
550: }
551:
552: sub end_foilgroup {
553: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
554: my $result='';
555: my @whichopt;
556:
557: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
558: $target eq 'analyze' || $target eq 'answer') {
559:
560: my ($count,$max) = &getfoilcounts($parstack,$safeeval);
561: if ($count>$max) { $count=$max }
562: &Apache::lonxml::debug("Count is $count from $max");
563:
564: @whichopt = &whichfoils($max);
565:
566: if ($target eq 'web' || $target eq 'tex') {
567: $result=&displayfoils($target,@whichopt);
568: if ($Apache::lonhomework::type eq 'randomizetry') {
569: if ($target eq 'web') {
570: &get_prior_options($target,@whichopt);
571: }
572: }
573: $Apache::lonxml::post_evaluate=0;
574: } elsif ($target eq 'grade') {
575: if ( defined $env{'form.submitted'}) { &gradefoils(@whichopt); }
576: } elsif ( $target eq 'analyze') {
577: &Apache::response::analyze_store_foilgroup(\@whichopt,
578: ['text','image','area']);
579: } elsif ($target eq 'answer'
580: && $env{'form.answer_output_mode'} ne 'tex') {
581: $result=&display_answers($target,\@whichopt);
582: }
583:
584: } elsif ($target eq 'edit') {
585: $result=&Apache::edit::end_table();
586: }
587: &Apache::response::poprandomnumber();
588: return $result;
589: }
590:
591: sub start_conceptgroup {
592: $Apache::imageresponse::conceptgroup=1;
593: %Apache::response::conceptgroup=();
594: return '';
595: }
596:
597: sub end_conceptgroup {
598: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
599: $Apache::imageresponse::conceptgroup=0;
600: my $result;
601: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
602: $target eq 'analyze') {
603: &Apache::response::pick_foil_for_concept($target,
604: ['area','text','image'],
605: \%Apache::hint::image,
606: $parstack,$safeeval);
607: } elsif ($target eq 'edit') {
608: $result=&Apache::edit::end_table();
609: }
610: return $result;
611: }
612:
613: sub insert_foil {
614: return '
615: <foil>
616: <image></image>
617: <text></text>
618: <rectangle></rectangle>
619: </foil>
620: ';
621: }
622:
623: $Apache::imageresponse::curname='';
624: sub start_foil {
625: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
626: my $result;
627: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
628: $target eq 'analyze' || $target eq 'answer') {
629: my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
630: if ($name eq "") {
631: &Apache::lonxml::warning(&mt('Foils without names exist. This can cause problems to malfunction.'));
632: $name=$Apache::lonxml::curdepth;
633: }
634: if (defined($Apache::response::foilnames{$name})) {
635: &Apache::lonxml::error(&mt("Foil name [_1] appears more than once. Foil names need to be unique."
636: ,'<b><tt>'.$name.'</tt></b>'));
637: }
638: $Apache::response::foilnames{$name}++;
639: if ( $Apache::imageresponse::conceptgroup
640: && !&Apache::response::showallfoils()
641: ) {
642: push(@{ $Apache::response::conceptgroup{'names'} }, $name);
643: } else {
644: push(@{ $Apache::response::foilgroup{'names'} }, $name);
645: }
646: $Apache::imageresponse::curname=$name;
647: } elsif ($target eq 'edit') {
648: $result = &Apache::edit::tag_start($target,$token);
649: $result .= &Apache::edit::text_arg('Name:','name',$token);
650: $result .= &Apache::edit::end_row().
651: &Apache::edit::start_spanning_row();
652: } elsif ($target eq 'modified') {
653: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
654: $safeeval,'name');
655: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
656: }
657: return $result;;
658: }
659:
660: sub end_foil {
661: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
662: my $result;
663: if ($target eq 'edit') {
664: $result=&Apache::edit::end_table();
665: }
666: return $result;
667: }
668:
669: sub start_text {
670: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
671: my $result='';
672: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze'
673: || $target eq 'answer') {
674: &Apache::lonxml::startredirection;
675: } elsif ($target eq 'edit') {
676: my $descr=&Apache::lonxml::get_all_text('/text',$parser,$style);
677: $result=&Apache::edit::tag_start($target,$token,'Task Description').
678: &Apache::edit::editfield($token->[1],$descr,'Text',60,2).
679: &Apache::edit::end_row();
680: } elsif ($target eq "modified") {
681: $result=$token->[4].&Apache::edit::modifiedfield('/text',$parser);
682: }
683: return $result;
684: }
685:
686: sub end_text {
687: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
688: my $result;
689: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze'
690: || $target eq 'answer') {
691: my $name = $Apache::imageresponse::curname;
692: if ( $Apache::imageresponse::conceptgroup
693: && !&Apache::response::showallfoils()
694: ) {
695: $Apache::response::conceptgroup{"$name.text"} = &Apache::lonxml::endredirection;
696: } else {
697: $Apache::response::foilgroup{"$name.text"} = &Apache::lonxml::endredirection;
698: }
699: } elsif ($target eq 'edit') {
700: $result=&Apache::edit::end_table();
701: }
702: return $result;
703: }
704:
705: sub start_image {
706: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
707: my $result='';
708: my $only = join(',',&Apache::loncommon::filecategorytypes('Pictures'));
709: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze'
710: || $target eq 'answer') {
711: &Apache::lonxml::startredirection;
712: } elsif ($target eq 'edit') {
713: my $bgimg=&Apache::lonxml::get_all_text('/image',$parser,$style);
714: $Apache::edit::bgimgsrc=$bgimg;
715: $Apache::edit::bgimgsrcdepth=$Apache::lonxml::curdepth;
716:
717: $result=&Apache::edit::tag_start($target,$token,'Clickable Image').
718: &Apache::edit::editline($token->[1],$bgimg,'Image Source File',40);
719: $result.=&Apache::edit::browse(undef,'textnode',undef,$only).' ';
720: $result.=&Apache::edit::search(undef,'textnode').
721: &Apache::edit::end_row();
722: } elsif ($target eq "modified") {
723: $result=$token->[4].&Apache::edit::modifiedfield('/image',$parser);
724: }
725: return $result;
726: }
727:
728: sub end_image {
729: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
730: my $result;
731: my $name = $Apache::imageresponse::curname;
732: if ($target eq 'web' || $target eq 'answer') {
733: my $image = &Apache::lonxml::endredirection();
734: &Apache::lonxml::debug("original image is $image");
735: if ( $Apache::imageresponse::conceptgroup
736: && !&Apache::response::showallfoils()
737: ) {
738: $Apache::response::conceptgroup{"$name.image"} = $image;
739: } else {
740: $Apache::response::foilgroup{"$name.image"} = $image;
741: }
742: } elsif ($target eq 'analyze') {
743: my $image = &Apache::lonxml::endredirection();
744: if ( $Apache::imageresponse::conceptgroup
745: && !&Apache::response::showallfoils()
746: ) {
747: $Apache::response::conceptgroup{"$name.image"} = $image;
748: } else {
749: $Apache::response::foilgroup{"$name.image"} = $image;
750: }
751: } elsif ($target eq 'edit') {
752: $result=&Apache::edit::end_table();
753: } elsif ($target eq 'tex') {
754: my $src = &Apache::lonxml::endredirection();
755:
756: # There may be all sorts of whitespace on fore and aft:
757:
758: $src =~ s/\s+$//s;
759: $src =~ s/^\s+//s;
760:
761: #
762: # Gnuplot e.g. just generates the latex to put inplace.
763: #
764: my $graphinclude;
765: if ($src =~ /^%DYNAMICIMAGE/) {
766: # This is needed because the newline is not always passed -> tex.
767: # At present we don't care about the sizing info.
768:
769: my ($commentline, $restofstuff) = split(/\n/, $src);
770: $graphinclude = $src;
771: $graphinclude =~ s/^$commentline//;
772: } elsif (!($src =~ /\\/)) {
773: my ($path,$file) = &Apache::londefdef::get_eps_image($src);
774: my ($height_param,$width_param)=
775: &Apache::londefdef::image_size($src,0.3,$parstack,$safeeval);
776: $graphinclude = '\graphicspath{{'.$path.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'}';
777: } else {
778: $graphinclude = $src; # Already fully formed.
779: }
780: $Apache::response::foilgroup{"$name.image"} ='\vskip 0 mm \noindent '.$graphinclude;
781: }
782: return $result;
783: }
784:
785: sub start_rectangle {
786: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
787: my $result='';
788: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
789: $target eq 'analyze' || $target eq 'answer') {
790: &Apache::lonxml::startredirection;
791: } elsif ($target eq 'edit') {
792: my $coords=&Apache::lonxml::get_all_text('/rectangle',$parser,$style);
793: $result=&Apache::edit::tag_start($target,$token,'Rectangle').
794: &Apache::edit::editline($token->[1],$coords,'Coordinate Pairs',40).
795: &Apache::edit::entercoord(undef,'textnode',undef,undef,'box').
796: &Apache::edit::end_row();
797: } elsif ($target eq "modified") {
798: &Apache::edit::deletecoorddata();
799: $result=$token->[4].&Apache::edit::modifiedfield('/rectangle',$parser);
800: }
801: return $result;
802: }
803:
804: sub grade_rectangle {
805: my ($spec,$x,$y) = @_;
806: &Apache::lonxml::debug("Spec is $spec");
807: my ($x1,$y1,$x2,$y2)=($spec=~m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/);
808: &Apache::lonxml::debug("Point $x1,$y1,$x2,$y2");
809: if ($x1 > $x2) { my $temp=$x1;$x1=$x2;$x2=$temp; }
810: if ($y1 > $y2) { my $temp=$y1;$y1=$y2;$y2=$temp; }
811: if (($x >= $x1) && ($x <= $x2) && ($y >= $y1) && ($y <= $y2)) {
812: return 'APPROX_ANS';
813: }
814: return 'INCORRECT';
815: }
816:
817: sub end_rectangle {
818: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
819: my $result;
820: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
821: $target eq 'analyze' || $target eq 'answer') {
822: my $name = $Apache::imageresponse::curname;
823: my $area = &Apache::lonxml::endredirection;
824: $area=~s/\s//g;
825: &Apache::lonxml::debug("out is $area for $name");
826: if ( $Apache::imageresponse::conceptgroup
827: && !&Apache::response::showallfoils()
828: ) {
829: push @{ $Apache::response::conceptgroup{"$name.area"} },"rectangle:$area";
830: } else {
831: push @{ $Apache::response::foilgroup{"$name.area"} },"rectangle:$area";
832: }
833: } elsif ($target eq 'edit') {
834: $result=&Apache::edit::end_table();
835: }
836: return $result;
837: }
838:
839: sub start_polygon {
840: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
841: my $result='';
842: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
843: $target eq 'analyze' || $target eq 'answer') {
844: &Apache::lonxml::startredirection;
845: } elsif ($target eq 'edit') {
846: my $coords=&Apache::lonxml::get_all_text('/polygon',$parser,$style);
847: $result=&Apache::edit::tag_start($target,$token,'Polygon').
848: &Apache::edit::editline($token->[1],$coords,'Coordinate list',40).
849: &Apache::edit::entercoord(undef,'textnode',undef,undef,'polygon').
850: &Apache::edit::end_row();
851: } elsif ($target eq "modified") {
852: $result=$token->[4].&Apache::edit::modifiedfield('/polygon',$parser);
853: }
854: return $result;
855: }
856:
857: sub grade_polygon {
858: my ($spec,$x,$y) = @_;
859: &Apache::lonxml::debug("Spec is $spec");
860: $spec=~s/^polygon://;
861: my @polygon;
862: foreach my $coord (split('-',$spec)) {
863: my ($x,$y)=($coord=~m/\(([0-9]+),([0-9]+)\)/);
864: &Apache::lonxml::debug("x $x y $y");
865: push @polygon, {'x'=>$x,'y'=>$y};
866: }
867: #make end point start point
868: push @polygon, $polygon[0];
869: # cribbed from
870: # http://geometryalgorithms.com/Archive/algorithm_0103/algorithm_0103.htm
871: my $crossing = 0; # the crossing number counter
872:
873: # loop through all edges of the polygon
874: for (my $i=0; $i<$#polygon; $i++) { # edge from V[i] to V[i+1]
875: if ((($polygon[$i]->{'y'} <= $y)
876: && ($polygon[$i+1]->{'y'} > $y)) # an upward crossing
877: ||
878: (($polygon[$i]->{'y'} > $y)
879: && ($polygon[$i+1]->{'y'} <= $y))) { # a downward crossing
880: # compute the actual edge-ray intersect x-coordinate
881: my $vt = ($y - $polygon[$i]->{'y'})
882: / ($polygon[$i+1]->{'y'} - $polygon[$i]->{'y'});
883: if ($x < $polygon[$i]->{'x'} + $vt *
884: ($polygon[$i+1]->{'x'} - $polygon[$i]->{'x'})) { # x<intersect
885: $crossing++; # a valid crossing of y=P.y right of P.x
886: }
887: }
888: }
889:
890: # 0 if even (out), and 1 if odd (in)
891: if ($crossing%2) {
892: return 'APPROX_ANS';
893: } else {
894: return 'INCORRECT';
895: }
896: }
897:
898: sub end_polygon {
899: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
900: my $result;
901: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
902: $target eq 'analyze' || $target eq 'answer') {
903: my $name = $Apache::imageresponse::curname;
904: my $area = &Apache::lonxml::endredirection;
905: $area=~s/\s*//g;
906: &Apache::lonxml::debug("out is $area for $name");
907: if ( $Apache::imageresponse::conceptgroup
908: && !&Apache::response::showallfoils()
909: ) {
910: push @{ $Apache::response::conceptgroup{"$name.area"} },"polygon:$area";
911: } else {
912: push @{ $Apache::response::foilgroup{"$name.area"} },"polygon:$area";
913: }
914: } elsif ($target eq 'edit') {
915: $result=&Apache::edit::end_table();
916: }
917: return $result;
918: }
919: 1;
920: __END__
921:
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