1: #
2: # The LearningOnline Network with CAPA
3: # image click response style
4: #
5: # $Id: imageresponse.pm,v 1.104 2012/10/12 12:45:46 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: my $repetition = &Apache::response::repetition();
183: &Apache::lonxml::increment_counter($repetition,
184: "$part_id.$response_id");
185: if ($target eq 'analyze') {
186: &Apache::lonhomework::set_bubble_lines();
187: }
188:
189: }
190: &Apache::response::end_response();
191: return $result;
192: }
193:
194: %Apache::response::foilgroup=();
195: sub start_foilgroup {
196: my ($target) = @_;
197: %Apache::response::foilgroup=();
198: $Apache::imageresponse::conceptgroup=0;
199: &Apache::response::pushrandomnumber(undef,$target);
200: return '';
201: }
202:
203: sub getfoilcounts {
204: my ($parstack,$safeeval)=@_;
205:
206: my $max = &Apache::lonxml::get_param('max',$parstack,$safeeval,'-2');
207: # +1 since instructors will count from 1
208: my $count = $#{ $Apache::response::foilgroup{'names'} }+1;
209: if (&Apache::response::showallfoils()) { $max=$count; }
210: return ($count,$max);
211: }
212:
213: sub whichfoils {
214: my ($max)=@_;
215: my @names;
216: if (ref($Apache::response::foilgroup{'names'}) eq 'ARRAY') {
217: @names = @{ $Apache::response::foilgroup{'names'} };
218: }
219: return if (!@names);
220: my @whichopt;
221: while ((($#whichopt+1) < $max) && ($#names > -1)) {
222: &Apache::lonxml::debug("Have $#whichopt max is $max");
223: my $aopt;
224: if (&Apache::response::showallfoils()) {
225: $aopt=0;
226: } else {
227: $aopt=int(&Math::Random::random_uniform() * ($#names+1));
228: }
229: &Apache::lonxml::debug("From $#names elms, picking $aopt");
230: $aopt=splice(@names,$aopt,1);
231: &Apache::lonxml::debug("Picked $aopt");
232: push(@whichopt,$aopt);
233: }
234: return @whichopt;
235: }
236:
237: sub prep_image {
238: my ($image,$mode,$name)=@_;
239:
240: my ($x,$y)= &get_submission($name);
241: &Apache::lonxml::debug("for $name drawing click at $x and $y");
242: &draw_image($mode,$image,$x,$y,$Apache::response::foilgroup{"$name.area"});
243: }
244:
245: sub draw_image {
246: my ($mode,$image,$x,$y,$areas) = @_;
247:
248: my $id=&Apache::loncommon::get_cgi_id();
249:
250: my (%x,$i);
251: $x{"cgi.$id.BGIMG"}=&escape($image);
252:
253: #draws 2 xs on the image at the clicked location
254: #one in white and then one in red on top of the one in white
255:
256: if (defined($x) && $x =~/\S/
257: && defined($y) && $y =~/\S/
258: && ($mode eq 'submission' || !&Apache::response::show_answer())
259: && $mode ne 'answeronly') {
260: my $length = 6;
261: my $width = 1;
262: my $extrawidth = 2;
263: my $xmin=($x-$length);
264: my $xmax=($x+$length);
265: my $ymin=($y-$length);
266: my $ymax=($y+$length);
267:
268: $x{"cgi.$id.OBJTYPE"}.='LINE:';
269: $i=$x{"cgi.$id.OBJCOUNT"}++;
270: $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymin),($xmax),($ymax),
271: "FFFFFF",($width+$extrawidth)));
272: $x{"cgi.$id.OBJTYPE"}.='LINE:';
273: $i=$x{"cgi.$id.OBJCOUNT"}++;
274: $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymax),($xmax),($ymin),
275: "FFFFFF",($width+$extrawidth)));
276: $x{"cgi.$id.OBJTYPE"}.='LINE:';
277: $i=$x{"cgi.$id.OBJCOUNT"}++;
278: $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymin),($xmax),($ymax),
279: "FF0000",($width)));
280: $x{"cgi.$id.OBJTYPE"}.='LINE:';
281: $i=$x{"cgi.$id.OBJCOUNT"}++;
282: $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymax),($xmax),($ymin),
283: "FF0000",($width)));
284: }
285: if ($mode eq 'answer' || $mode eq 'answeronly') {
286: my $width = 1;
287: my $extrawidth = 2;
288: foreach my $area (@{ $areas }) {
289: if ($area=~/^rectangle:/) {
290: $x{"cgi.$id.OBJTYPE"}.='RECTANGLE:';
291: $i=$x{"cgi.$id.OBJCOUNT"}++;
292: my ($x1,$y1,$x2,$y2)=
293: ($area=~m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/);
294: $x{"cgi.$id.OBJ$i"}=join(':',($x1,$y1,$x2,$y2,"FFFFFF",
295: ($width+$extrawidth)));
296: $x{"cgi.$id.OBJTYPE"}.='RECTANGLE:';
297: $i=$x{"cgi.$id.OBJCOUNT"}++;
298: $x{"cgi.$id.OBJ$i"}=join(':',($x1,$y1,$x2,$y2,"00FF00",$width));
299: } elsif ($area=~/^polygon:(.*)/) {
300: $x{"cgi.$id.OBJTYPE"}.='POLYGON:';
301: $i=$x{"cgi.$id.OBJCOUNT"}++;
302: $x{"cgi.$id.OBJ$i"}=join(':',("FFFFFF",($width+$extrawidth)));
303: $x{"cgi.$id.OBJEXTRA$i"}=$1;
304: $x{"cgi.$id.OBJTYPE"}.='POLYGON:';
305: $i=$x{"cgi.$id.OBJCOUNT"}++;
306: $x{"cgi.$id.OBJ$i"}=join(':',("00FF00",$width));
307: $x{"cgi.$id.OBJEXTRA$i"}=$1;
308: }
309: }
310: }
311: &Apache::lonnet::appenv(\%x);
312: return $id;
313: }
314:
315: sub displayfoils {
316: my ($target,@whichopt) = @_;
317: my $result ='';
318: my $temp=1;
319: my @images;
320: foreach my $name (@whichopt) {
321: $result.=$Apache::response::foilgroup{"$name.text"};
322: &Apache::lonxml::debug("Text is $result");
323: if ($target eq 'tex') {$result.="\\vskip 0 mm \n";} else {$result.="<br />\n";}
324: my $image=$Apache::response::foilgroup{"$name.image"};
325: &Apache::lonxml::debug("image is $image");
326: if ( ($target eq 'web' || $target eq 'answer')
327: && $image !~ /^https?\:/ ) {
328: $image=&clean_up_image($image);
329: }
330: push(@images,$image);
331: &Apache::lonxml::debug("image is $image");
332: if ( &Apache::response::show_answer() ) {
333: if ($target eq 'tex') {
334: $result.=$Apache::response::foilgroup{"$name.image"}."\\vskip 0 mm \n";
335: } else {
336: my $token=&prep_image($image,'answer',$name);
337: $result.="<img src=\"/adm/randomlabel.png?token=$token\" /><br />\n";
338: }
339: } else {
340: if ($target eq 'tex') {
341: $result.=$Apache::response::foilgroup{"$name.image"}."\\vskip 0 mm \n";
342: } else {
343: my $respid=$Apache::inputtags::response['-1'];
344: my $token=&prep_image($image,'submission',$name);
345: my $input_id = "HWVAL_$respid:$temp";
346: my $id = $env{'form.request.prefix'}.$input_id;
347: $result.='<img onclick="image_response_click(\''.$id.'\',event);"
348: src="/adm/randomlabel.png?token='.$token.'"
349: id="'.$id.'_imageresponse"
350: />'.
351: '<br />'.
352: '<input type="hidden" name="'.$input_id.'_token" value="'.$token.'" />'.
353: '<input type="hidden" name="'.$input_id.'" value="'.
354: join(':',&get_submission($name)).'" />';
355: }
356: }
357: $temp++;
358: }
359: if ($target eq 'web') {
360: &get_prior_options(\@images,\@whichopt);
361: }
362: return $result;
363: }
364:
365: sub get_prior_options {
366: my ($currimages,$curropt) = @_;
367: return unless((ref($curropt) eq 'ARRAY') &&
368: (ref($currimages) eq 'ARRAY'));
369: my $part = $Apache::inputtags::part;
370: my $respid = $Apache::inputtags::response[-1];
371: foreach my $i (1..$Apache::lonhomework::history{'version'}) {
372: my $partprefix = "$i:resource.$part";
373: my $sub_key = "$partprefix.$respid.submission";
374: next if (!exists($Apache::lonhomework::history{$sub_key}));
375: my $type_key = "$partprefix.type";
376: my @whichopt = ();
377: my @images = ();
378: if ($Apache::lonhomework::history{$type_key} eq 'randomizetry') {
379: my $order_key = "$partprefix.$respid.foilorder";
380: @whichopt = &Apache::lonnet::str2array($Apache::lonhomework::history{$order_key});
381: if (@whichopt > 0) {
382: foreach my $name (@whichopt) {
383: my $image=$Apache::response::foilgroup{"$name.image"};
384: if ($image !~ /^https?\:/ ) {
385: $image=&clean_up_image($image);
386: }
387: push(@images,$image);
388: }
389: }
390: } else {
391: @whichopt = @{$curropt};
392: @images = @{$currimages};
393: }
394: my $submission = $Apache::lonhomework::history{$sub_key};
395: my $output = &format_prior_response('grade',$submission,
396: [\@images,\@whichopt]);
397: if (defined($output)) {
398: $Apache::inputtags::submission_display{$sub_key} = $output;
399: }
400: }
401: }
402:
403: sub format_prior_response {
404: my ($mode,$answer,$other_data) = @_;
405:
406: my $result;
407:
408: # make a copy of the data in the refs
409: my @images = @{ $other_data->[0] };
410: my @foils = @{ $other_data->[1] };
411: foreach my $name (@foils) {
412: my $image = pop(@images);
413: my ($x,$y) = &get_submission($name,$answer);
414: my $token = &draw_image('submission',$image,$x,$y);
415: $result .=
416: '<img class="LC_prior_image"
417: src="/adm/randomlabel.png?token='.$token.'" /><br />';
418: }
419: return $result;
420: }
421:
422: sub display_answers {
423: my ($target,$whichopt)=@_;
424:
425: my $result=&Apache::response::answer_header('imageresponse');
426: foreach my $name (@$whichopt) {
427: my $image=$Apache::response::foilgroup{"$name.image"};
428: &Apache::lonxml::debug("image is $image");
429: if ( ($target eq 'web' || $target eq 'answer')
430: && $image !~ /^https?\:/ ) {
431: $image = &clean_up_image($image);
432: }
433: my $token=&prep_image($image,'answeronly',$name);
434:
435: $result.=&Apache::response::answer_part('imageresponse',"<img src=\"/adm/randomlabel.png?token=$token\" /><br />\n");
436: }
437: $result.=&Apache::response::answer_footer('imageresponse');
438: return $result;
439: }
440:
441: sub clean_up_image {
442: my ($image)=@_;
443: if ($image =~ /\s*<img\s*/) {
444: ($image) = ($image =~ /src\s*=\s*[\"\']([^\"\']+)[\"\']/i);
445: if ($image !~ /^https?\:/) {
446: $image=&Apache::lonnet::hreflocation('',$image);
447: }
448: if (!$image) {
449: $image='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';
450: }
451: } else {
452: $image=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$image);
453: &Apache::lonxml::debug("repcopying: $image");
454: if (&Apache::lonnet::repcopy($image) ne 'ok') {
455: $image='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';
456: }
457: }
458: return $image;
459: }
460:
461: sub gradefoils {
462: my (@whichopt) = @_;
463:
464: my $partid = $Apache::inputtags::part;
465: my $id = $Apache::inputtags::response['-1'];
466:
467: if ($Apache::lonhomework::type eq 'exam') {
468: &Apache::response::scored_response($partid,$id);
469: return;
470: }
471:
472: my @results;
473: my $temp=1;
474: my %response;
475: foreach my $name (@whichopt) {
476: my ($x,$y) = split(':',$env{"form.HWVAL_$id:$temp"});
477: $response{$name} = $env{"form.HWVAL_$id:$temp"};
478: &Apache::lonxml::debug("Got a x of $x and a y of $y for $name");
479: my @areas;
480: if (ref($Apache::response::foilgroup{"$name.area"}) eq 'ARRAY') {
481: @areas = @{ $Apache::response::foilgroup{"$name.area"} };
482: }
483: if (defined($x) && defined($y) && @areas) {
484: my $grade="INCORRECT";
485: foreach my $area (@areas) {
486: &Apache::lonxml::debug("Area is $area for $name");
487: $area =~ m/([a-z]*):/;
488: &Apache::lonxml::debug("Area of type $1");
489: if ($1 eq 'rectangle') {
490: $grade=&grade_rectangle($area,$x,$y);
491: } elsif ($1 eq 'polygon') {
492: $grade=&grade_polygon($area,$x,$y);
493: } else {
494: &Apache::lonxml::error(&mt('Unknown area style [_1]',$area));
495: }
496: &Apache::lonxml::debug("Area said $grade");
497: if ($grade eq 'APPROX_ANS') { last; }
498: }
499: &Apache::lonxml::debug("Foil was $grade");
500: push(@results, $grade)
501: } else {
502: push(@results, 'MISSING_ANSWER')
503: }
504: $temp++;
505: }
506: if ($Apache::lonhomework::type eq 'randomizetry') {
507: $Apache::lonhomework::results{"resource.$partid.$id.foilorder"} = &Apache::lonnet::array2str(@whichopt);
508: }
509: my ($result) = &Apache::inputtags::finalizeawards(\@results,[]);
510: &Apache::lonxml::debug("Question is $result");
511:
512: my $part=$Apache::inputtags::part;
513: my %previous=
514: &Apache::response::check_for_previous(&stringify_submission(\%response),
515: $part,$id);
516: if ($result) {
517: if ($Apache::lonhomework::type eq 'survey') {
518: $result='SUBMITTED';
519: } elsif ($Apache::lonhomework::type eq 'surveycred') {
520: $result='SUBMITTED_CREDIT';
521: } elsif ($Apache::lonhomework::type eq 'anonsurvey') {
522: $result='ANONYMOUS';
523: } elsif ($Apache::lonhomework::type eq 'anonsurveycred') {
524: $result='ANONYMOUS_CREDIT';
525: }
526: }
527:
528: &Apache::response::handle_previous(\%previous,$result);
529: $Apache::lonhomework::results{"resource.$part.$id.submission"}=
530: &stringify_submission(\%response);
531: $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=$result;
532: return;
533: }
534:
535: sub stringify_submission {
536: my ($response) = @_;
537: return &Apache::lonnet::hash2str(%{ $response });
538: }
539:
540: sub get_submission {
541: my ($name,$string) = @_;
542:
543: if (!defined($string)) {
544: my $part=$Apache::inputtags::part;
545: my $respid=$Apache::inputtags::response['-1'];
546: $string =
547: $Apache::lonhomework::history{"resource.$part.$respid.submission"};
548: }
549:
550: if ($string !~ /=/) {
551: return split(':',$string);
552: } else {
553: my %response = &Apache::lonnet::str2hash($string);
554: return split(':',$response{$name});
555: }
556: }
557:
558: sub end_foilgroup {
559: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
560: my $result='';
561: my @whichopt;
562:
563: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
564: $target eq 'analyze' || $target eq 'answer') {
565:
566: my ($count,$max) = &getfoilcounts($parstack,$safeeval);
567: if ($count>$max) { $count=$max }
568: &Apache::lonxml::debug("Count is $count from $max");
569:
570: @whichopt = &whichfoils($max);
571:
572: if ($target eq 'web' || $target eq 'tex') {
573: $result=&displayfoils($target,@whichopt);
574: if ($Apache::lonhomework::type eq 'randomizetry') {
575: if ($target eq 'web') {
576: &get_prior_options($target,@whichopt);
577: }
578: }
579: $Apache::lonxml::post_evaluate=0;
580: } elsif ($target eq 'grade') {
581: if ( defined $env{'form.submitted'}) { &gradefoils(@whichopt); }
582: } elsif ( $target eq 'analyze') {
583: &Apache::response::analyze_store_foilgroup(\@whichopt,
584: ['text','image','area']);
585: } elsif ($target eq 'answer'
586: && $env{'form.answer_output_mode'} ne 'tex') {
587: $result=&display_answers($target,\@whichopt);
588: }
589:
590: } elsif ($target eq 'edit') {
591: $result=&Apache::edit::end_table();
592: }
593: &Apache::response::poprandomnumber();
594: return $result;
595: }
596:
597: sub start_conceptgroup {
598: $Apache::imageresponse::conceptgroup=1;
599: %Apache::response::conceptgroup=();
600: return '';
601: }
602:
603: sub end_conceptgroup {
604: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
605: $Apache::imageresponse::conceptgroup=0;
606: my $result;
607: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
608: $target eq 'analyze') {
609: &Apache::response::pick_foil_for_concept($target,
610: ['area','text','image'],
611: \%Apache::hint::image,
612: $parstack,$safeeval);
613: } elsif ($target eq 'edit') {
614: $result=&Apache::edit::end_table();
615: }
616: return $result;
617: }
618:
619: sub insert_foil {
620: return '
621: <foil>
622: <image></image>
623: <text></text>
624: <rectangle></rectangle>
625: </foil>
626: ';
627: }
628:
629: $Apache::imageresponse::curname='';
630: sub start_foil {
631: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
632: my $result;
633: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
634: $target eq 'analyze' || $target eq 'answer') {
635: my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
636: if ($name eq "") {
637: &Apache::lonxml::warning(&mt('Foils without names exist. This can cause problems to malfunction.'));
638: $name=$Apache::lonxml::curdepth;
639: }
640: if (defined($Apache::response::foilnames{$name})) {
641: &Apache::lonxml::error(&mt("Foil name [_1] appears more than once. Foil names need to be unique."
642: ,'<b><tt>'.$name.'</tt></b>'));
643: }
644: $Apache::response::foilnames{$name}++;
645: if ( $Apache::imageresponse::conceptgroup
646: && !&Apache::response::showallfoils()
647: ) {
648: push(@{ $Apache::response::conceptgroup{'names'} }, $name);
649: } else {
650: push(@{ $Apache::response::foilgroup{'names'} }, $name);
651: }
652: $Apache::imageresponse::curname=$name;
653: } elsif ($target eq 'edit') {
654: $result = &Apache::edit::tag_start($target,$token);
655: $result .= &Apache::edit::text_arg('Name:','name',$token);
656: $result .= &Apache::edit::end_row().
657: &Apache::edit::start_spanning_row();
658: } elsif ($target eq 'modified') {
659: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
660: $safeeval,'name');
661: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
662: }
663: return $result;;
664: }
665:
666: sub end_foil {
667: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
668: my $result;
669: if ($target eq 'edit') {
670: $result=&Apache::edit::end_table();
671: }
672: return $result;
673: }
674:
675: sub start_text {
676: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
677: my $result='';
678: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze'
679: || $target eq 'answer') {
680: &Apache::lonxml::startredirection;
681: } elsif ($target eq 'edit') {
682: my $descr=&Apache::lonxml::get_all_text('/text',$parser,$style);
683: $result=&Apache::edit::tag_start($target,$token,'Task Description').
684: &Apache::edit::editfield($token->[1],$descr,'Text',60,2).
685: &Apache::edit::end_row();
686: } elsif ($target eq "modified") {
687: $result=$token->[4].&Apache::edit::modifiedfield('/text',$parser);
688: }
689: return $result;
690: }
691:
692: sub end_text {
693: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
694: my $result;
695: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze'
696: || $target eq 'answer') {
697: my $name = $Apache::imageresponse::curname;
698: if ( $Apache::imageresponse::conceptgroup
699: && !&Apache::response::showallfoils()
700: ) {
701: $Apache::response::conceptgroup{"$name.text"} = &Apache::lonxml::endredirection;
702: } else {
703: $Apache::response::foilgroup{"$name.text"} = &Apache::lonxml::endredirection;
704: }
705: } elsif ($target eq 'edit') {
706: $result=&Apache::edit::end_table();
707: }
708: return $result;
709: }
710:
711: sub start_image {
712: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
713: my $result='';
714: my $only = join(',',&Apache::loncommon::filecategorytypes('Pictures'));
715: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze'
716: || $target eq 'answer') {
717: &Apache::lonxml::startredirection;
718: } elsif ($target eq 'edit') {
719: my $bgimg=&Apache::lonxml::get_all_text('/image',$parser,$style);
720: $Apache::edit::bgimgsrc=$bgimg;
721: $Apache::edit::bgimgsrcdepth=$Apache::lonxml::curdepth;
722:
723: $result=&Apache::edit::tag_start($target,$token,'Clickable Image').
724: &Apache::edit::editline($token->[1],$bgimg,'Image Source File',40);
725: $result.=&Apache::edit::browse(undef,'textnode',undef,$only).' ';
726: $result.=&Apache::edit::search(undef,'textnode').
727: &Apache::edit::end_row();
728: } elsif ($target eq "modified") {
729: $result=$token->[4].&Apache::edit::modifiedfield('/image',$parser);
730: }
731: return $result;
732: }
733:
734: sub end_image {
735: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
736: my $result;
737: my $name = $Apache::imageresponse::curname;
738: if ($target eq 'web' || $target eq 'answer') {
739: my $image = &Apache::lonxml::endredirection();
740: &Apache::lonxml::debug("original image is $image");
741: if ( $Apache::imageresponse::conceptgroup
742: && !&Apache::response::showallfoils()
743: ) {
744: $Apache::response::conceptgroup{"$name.image"} = $image;
745: } else {
746: $Apache::response::foilgroup{"$name.image"} = $image;
747: }
748: } elsif ($target eq 'analyze') {
749: my $image = &Apache::lonxml::endredirection();
750: if ( $Apache::imageresponse::conceptgroup
751: && !&Apache::response::showallfoils()
752: ) {
753: $Apache::response::conceptgroup{"$name.image"} = $image;
754: } else {
755: $Apache::response::foilgroup{"$name.image"} = $image;
756: }
757: } elsif ($target eq 'edit') {
758: $result=&Apache::edit::end_table();
759: } elsif ($target eq 'tex') {
760: my $src = &Apache::lonxml::endredirection();
761:
762: # There may be all sorts of whitespace on fore and aft:
763:
764: $src =~ s/\s+$//s;
765: $src =~ s/^\s+//s;
766:
767: #
768: # Gnuplot e.g. just generates the latex to put inplace.
769: #
770: my $graphinclude;
771: if ($src =~ /^%DYNAMICIMAGE/) {
772: # This is needed because the newline is not always passed -> tex.
773: # At present we don't care about the sizing info.
774:
775: my ($commentline, $restofstuff) = split(/\n/, $src);
776: $graphinclude = $src;
777: $graphinclude =~ s/^$commentline//;
778: } elsif (!($src =~ /\\/)) {
779: my ($path,$file) = &Apache::londefdef::get_eps_image($src);
780: my ($height_param,$width_param)=
781: &Apache::londefdef::image_size($src,0.3,$parstack,$safeeval);
782: $graphinclude = '\graphicspath{{'.$path.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'}';
783: } else {
784: $graphinclude = $src; # Already fully formed.
785: }
786: $Apache::response::foilgroup{"$name.image"} ='\vskip 0 mm \noindent '.$graphinclude;
787: }
788: return $result;
789: }
790:
791: sub start_rectangle {
792: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
793: my $result='';
794: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
795: $target eq 'analyze' || $target eq 'answer') {
796: &Apache::lonxml::startredirection;
797: } elsif ($target eq 'edit') {
798: my $coords=&Apache::lonxml::get_all_text('/rectangle',$parser,$style);
799: $result=&Apache::edit::tag_start($target,$token,'Rectangle').
800: &Apache::edit::editline($token->[1],$coords,'Coordinate Pairs',40).
801: &Apache::edit::entercoord(undef,'textnode',undef,undef,'box').
802: &Apache::edit::end_row();
803: } elsif ($target eq "modified") {
804: &Apache::edit::deletecoorddata();
805: $result=$token->[4].&Apache::edit::modifiedfield('/rectangle',$parser);
806: }
807: return $result;
808: }
809:
810: sub grade_rectangle {
811: my ($spec,$x,$y) = @_;
812: &Apache::lonxml::debug("Spec is $spec");
813: my ($x1,$y1,$x2,$y2)=($spec=~m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/);
814: &Apache::lonxml::debug("Point $x1,$y1,$x2,$y2");
815: if ($x1 > $x2) { my $temp=$x1;$x1=$x2;$x2=$temp; }
816: if ($y1 > $y2) { my $temp=$y1;$y1=$y2;$y2=$temp; }
817: if (($x >= $x1) && ($x <= $x2) && ($y >= $y1) && ($y <= $y2)) {
818: return 'APPROX_ANS';
819: }
820: return 'INCORRECT';
821: }
822:
823: sub end_rectangle {
824: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
825: my $result;
826: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
827: $target eq 'analyze' || $target eq 'answer') {
828: my $name = $Apache::imageresponse::curname;
829: my $area = &Apache::lonxml::endredirection;
830: $area=~s/\s//g;
831: &Apache::lonxml::debug("out is $area for $name");
832: if ( $Apache::imageresponse::conceptgroup
833: && !&Apache::response::showallfoils()
834: ) {
835: push @{ $Apache::response::conceptgroup{"$name.area"} },"rectangle:$area";
836: } else {
837: push @{ $Apache::response::foilgroup{"$name.area"} },"rectangle:$area";
838: }
839: } elsif ($target eq 'edit') {
840: $result=&Apache::edit::end_table();
841: }
842: return $result;
843: }
844:
845: sub start_polygon {
846: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
847: my $result='';
848: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
849: $target eq 'analyze' || $target eq 'answer') {
850: &Apache::lonxml::startredirection;
851: } elsif ($target eq 'edit') {
852: my $coords=&Apache::lonxml::get_all_text('/polygon',$parser,$style);
853: $result=&Apache::edit::tag_start($target,$token,'Polygon').
854: &Apache::edit::editline($token->[1],$coords,'Coordinate list',40).
855: &Apache::edit::entercoord(undef,'textnode',undef,undef,'polygon').
856: &Apache::edit::end_row();
857: } elsif ($target eq "modified") {
858: $result=$token->[4].&Apache::edit::modifiedfield('/polygon',$parser);
859: }
860: return $result;
861: }
862:
863: sub grade_polygon {
864: my ($spec,$x,$y) = @_;
865: &Apache::lonxml::debug("Spec is $spec");
866: $spec=~s/^polygon://;
867: my @polygon;
868: foreach my $coord (split('-',$spec)) {
869: my ($x,$y)=($coord=~m/\(([0-9]+),([0-9]+)\)/);
870: &Apache::lonxml::debug("x $x y $y");
871: push @polygon, {'x'=>$x,'y'=>$y};
872: }
873: #make end point start point
874: push @polygon, $polygon[0];
875: # cribbed from
876: # http://geometryalgorithms.com/Archive/algorithm_0103/algorithm_0103.htm
877: my $crossing = 0; # the crossing number counter
878:
879: # loop through all edges of the polygon
880: for (my $i=0; $i<$#polygon; $i++) { # edge from V[i] to V[i+1]
881: if ((($polygon[$i]->{'y'} <= $y)
882: && ($polygon[$i+1]->{'y'} > $y)) # an upward crossing
883: ||
884: (($polygon[$i]->{'y'} > $y)
885: && ($polygon[$i+1]->{'y'} <= $y))) { # a downward crossing
886: # compute the actual edge-ray intersect x-coordinate
887: my $vt = ($y - $polygon[$i]->{'y'})
888: / ($polygon[$i+1]->{'y'} - $polygon[$i]->{'y'});
889: if ($x < $polygon[$i]->{'x'} + $vt *
890: ($polygon[$i+1]->{'x'} - $polygon[$i]->{'x'})) { # x<intersect
891: $crossing++; # a valid crossing of y=P.y right of P.x
892: }
893: }
894: }
895:
896: # 0 if even (out), and 1 if odd (in)
897: if ($crossing%2) {
898: return 'APPROX_ANS';
899: } else {
900: return 'INCORRECT';
901: }
902: }
903:
904: sub end_polygon {
905: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
906: my $result;
907: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
908: $target eq 'analyze' || $target eq 'answer') {
909: my $name = $Apache::imageresponse::curname;
910: my $area = &Apache::lonxml::endredirection;
911: $area=~s/\s*//g;
912: &Apache::lonxml::debug("out is $area for $name");
913: if ( $Apache::imageresponse::conceptgroup
914: && !&Apache::response::showallfoils()
915: ) {
916: push @{ $Apache::response::conceptgroup{"$name.area"} },"polygon:$area";
917: } else {
918: push @{ $Apache::response::foilgroup{"$name.area"} },"polygon:$area";
919: }
920: } elsif ($target eq 'edit') {
921: $result=&Apache::edit::end_table();
922: }
923: return $result;
924: }
925: 1;
926: __END__
927:
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