Annotation of loncom/homework/drawimage.pm, revision 1.12

1.1       albertel    1: # The LearningOnline Network with CAPA
                      2: # programatic image drawing
                      3: #
1.12    ! raeburn     4: # $Id: drawimage.pm,v 1.11 2024/04/05 02:31:23 raeburn Exp $
1.1       albertel    5: #
                      6: # Copyright Michigan State University Board of Trustees
                      7: #
                      8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                      9: #
                     10: # LON-CAPA is free software; you can redistribute it and/or modify
                     11: # it under the terms of the GNU General Public License as published by
                     12: # the Free Software Foundation; either version 2 of the License, or
                     13: # (at your option) any later version.
                     14: #
                     15: # LON-CAPA is distributed in the hope that it will be useful,
                     16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     18: # GNU General Public License for more details.
                     19: #
                     20: # You should have received a copy of the GNU General Public License
                     21: # along with LON-CAPA; if not, write to the Free Software
                     22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     23: #
                     24: # /home/httpd/html/adm/gpl.txt
                     25: #
                     26: # http://www.lon-capa.org/
                     27: #
                     28: 
                     29: package Apache::drawimage;
                     30: use strict;
                     31: use Apache::loncommon;
1.12    ! raeburn    32: use Apache::lonnet;
        !            33: use Apache::lonxml;
1.9       www        34: use lib '/home/httpd/lib/perl/';
1.12    ! raeburn    35: use Time::HiRes qw(gettimeofday);
1.9       www        36: use LONCAPA;
                     37:  
1.1       albertel   38: 
                     39: my %args;
                     40: my $cgi_id;
1.7       albertel   41: my @cgi_ids;
1.1       albertel   42: BEGIN {
                     43:     &Apache::lonxml::register('Apache::drawimage',('drawimage'));
                     44: }
                     45: 
                     46: sub start_drawimage {
                     47:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.7       albertel   48:     &Apache::lonxml::register('Apache::drawimage',('text','line','rectangle','arc','fill','polygon','image'));
1.1       albertel   49:     if ($target eq 'web' || $target eq 'tex') {
1.7       albertel   50: 	my $new_id=&Apache::loncommon::get_cgi_id();
                     51: 	if ($cgi_id) { push(@cgi_ids,$cgi_id); } else { undef(%args); }
                     52: 	$cgi_id=$new_id;
1.1       albertel   53:     }
1.7       albertel   54:     return '';
1.1       albertel   55: }
                     56: 
                     57: sub end_drawimage {
                     58:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                     59:     my $result;
1.12    ! raeburn    60:     # need to call rand everytime start_script would evaluate, as the
        !            61:     # safe space rand number generator and the global rand generator
        !            62:     # are not separate
        !            63:     my $randnumber;
        !            64:     if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
        !            65:         $target eq 'answer') {
        !            66:         $randnumber=int(rand(1000));
        !            67:     }
1.1       albertel   68:     if ($target eq 'web' || $target eq 'tex') {
1.7       albertel   69: 	my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval);
                     70: 	my $height =&Apache::lonxml::get_param('height',$parstack,$safeeval);
                     71: 	my $bgcolor =&Apache::lonxml::get_param('bgcolor',$parstack,$safeeval);
                     72: 	if (!$width) { $width=300; }
                     73: 	if (!$height) { $height=300; }
1.12    ! raeburn    74:         $args{"cgi.$cgi_id.BGCOLOR"}=join(':',($bgcolor));
        !            75:         if ($target eq 'tex') {
        !            76:             my $texwidth=&Apache::lonxml::get_param('texwidth',$parstack,$safeeval,undef,1);
        !            77:             if (!$texwidth) { $texwidth='90'; }
        !            78:             $args{"cgi.$cgi_id.SIZE"}=join(':',($width,$height,$texwidth));
        !            79:             my $tmpdir = LONCAPA::tempdir(); # Where temporary files live:
        !            80:             ## Determine filename
        !            81:             my ($seconds, $microseconds) = gettimeofday;
        !            82:             my $filename = $env{'user.name'}.'_'.$env{'user.domain'}.
        !            83:                            '_'.$seconds.'_'.$microseconds.'_'.$$.$randnumber.'_drawimage.eps';
        !            84:             $args{"cgi.$cgi_id.EPSFILE"} = $env{'user.name'}.'_'.$env{'user.domain'}.
        !            85:                                            '_'.$seconds.'_'.$microseconds.'_'.$$.$randnumber.
        !            86:                                            '_drawimage.eps';
        !            87:             $result = "%DYNAMICIMAGE:$width:$height:$texwidth\n";
        !            88:             $result .= '\graphicspath{{'.$tmpdir.'}}'."\n";
        !            89:             $result .= '\includegraphics[width='.$texwidth.' mm]{'.$filename.'}';
        !            90:             &Apache::lonxml::register_ssi('/adm/randomlabel.png?token='.$cgi_id);
        !            91:         } else {
        !            92: 	    $args{"cgi.$cgi_id.SIZE"}=join(':',($width,$height));
        !            93: 	    $result.="<img width='$width' height='$height'
1.1       albertel   94:                            src='/adm/randomlabel.png?token=$cgi_id' />\n";
1.12    ! raeburn    95:         }
1.10      raeburn    96: 	&Apache::lonnet::appenv(\%args);
1.7       albertel   97: 	if (@cgi_ids) {
                     98: 	    $cgi_id=pop(@cgi_ids);
                     99: 	} else {
                    100: 	    undef($cgi_id);
1.1       albertel  101: 	}
1.7       albertel  102:     } elsif ($target eq 'edit') {
                    103:     } elsif ($target eq 'modified') {
1.1       albertel  104:     }
1.7       albertel  105:     
                    106:     &Apache::lonxml::register('Apache::drawimage',
                    107: 			      ('text','line','rectangle','arc','fill',
                    108: 			       'polygon'));
1.4       matthew   109:     return $result;
                    110: }
                    111: 
1.5       albertel  112: sub start_text {
1.4       matthew   113:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    114:     my $result;
                    115:     if ($target eq 'web' || $target eq 'tex') {
1.6       albertel  116: 	&Apache::lonxml::startredirection();
                    117:     }
                    118:     return $result;
                    119: }
                    120: 
                    121: sub end_text {
                    122:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    123:     my $result;
                    124:     if ($target eq 'web' || $target eq 'tex') {
1.4       matthew   125:         my $x     = &Apache::lonxml::get_param('x',$parstack,$safeeval);
                    126:         my $y     = &Apache::lonxml::get_param('y',$parstack,$safeeval);
                    127:         my $font  = &Apache::lonxml::get_param('font',$parstack,$safeeval);
                    128:         my $color = &Apache::lonxml::get_param('color',$parstack,$safeeval);
1.5       albertel  129:         my $direction = &Apache::lonxml::get_param('direction',$parstack,$safeeval);
1.11      raeburn   130:         my $rotation = &Apache::lonxml::get_param('rotation',$parstack,$safeeval);
1.6       albertel  131: 	my $text  = &Apache::lonxml::endredirection();
1.9       www       132:         $text = &escape($text);
1.4       matthew   133:         $args{"cgi.$cgi_id.OBJTYPE"}.='LABEL:';
                    134: 	my $i=$args{"cgi.$cgi_id.OBJCOUNT"}++;
1.11      raeburn   135: 	$args{"cgi.$cgi_id.OBJ$i"}=join(':',($x,$y,$text,$font,$color,$direction,$rotation));
1.4       matthew   136:     }
1.1       albertel  137:     return $result;
                    138: }
                    139: 
                    140: sub start_line {
                    141:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    142:     my $result;
                    143:     if ($target eq 'web' || $target eq 'tex') {
                    144: 	my $x1 = &Apache::lonxml::get_param('x1',$parstack,$safeeval);
                    145: 	my $y1 = &Apache::lonxml::get_param('y1',$parstack,$safeeval);
                    146: 	my $x2 = &Apache::lonxml::get_param('x2',$parstack,$safeeval);
                    147: 	my $y2 = &Apache::lonxml::get_param('y2',$parstack,$safeeval);
                    148: 	my $color = &Apache::lonxml::get_param('color',$parstack,$safeeval);
                    149: 	my $thickness = &Apache::lonxml::get_param('thickness',$parstack,$safeeval);
1.3       albertel  150: 	my $i=$args{"cgi.$cgi_id.OBJCOUNT"}++;
1.1       albertel  151: 	$args{"cgi.$cgi_id.OBJ$i"}=join(':',($x1,$y1,$x2,$y2,$color,$thickness));
                    152: 	$args{"cgi.$cgi_id.OBJTYPE"}.='LINE:';
                    153:     }
                    154:     return $result;
                    155: }
                    156: 
                    157: sub end_line {
                    158:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    159:     my $result;
                    160:     return $result;
                    161: }
                    162: 
                    163: sub start_rectangle {
                    164:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    165:     my $result;
                    166:     if ($target eq 'web' || $target eq 'tex') {
                    167: 	my $x1 = &Apache::lonxml::get_param('x1',$parstack,$safeeval);
                    168: 	my $y1 = &Apache::lonxml::get_param('y1',$parstack,$safeeval);
                    169: 	my $x2 = &Apache::lonxml::get_param('x2',$parstack,$safeeval);
                    170: 	my $y2 = &Apache::lonxml::get_param('y2',$parstack,$safeeval);
                    171: 	my $color = &Apache::lonxml::get_param('color',$parstack,$safeeval);
                    172: 	my $thickness = &Apache::lonxml::get_param('thickness',$parstack,
                    173: 						   $safeeval);
                    174: 	my $filled = &Apache::lonxml::get_param('filled',$parstack,
                    175: 						$safeeval);
1.3       albertel  176: 	my $i=$args{"cgi.$cgi_id.OBJCOUNT"}++;
1.1       albertel  177: 	$args{"cgi.$cgi_id.OBJ$i"}=
                    178: 	    join(':',($x1,$y1,$x2,$y2,$color,$thickness,$filled));
                    179: 	$args{"cgi.$cgi_id.OBJTYPE"}.='RECTANGLE:';
                    180:     }
                    181:     return $result;
                    182: }
                    183: 
                    184: sub end_rectangle {
                    185:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    186:     my $result;
                    187:     return $result;
                    188: }
                    189: 
                    190: sub start_arc {
                    191:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    192:     my $result;
                    193:     if ($target eq 'web' || $target eq 'tex') {
                    194: 	my $x = &Apache::lonxml::get_param('x',$parstack,$safeeval);
                    195: 	my $y = &Apache::lonxml::get_param('y',$parstack,$safeeval);
                    196: 	my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval);
                    197: 	my $height = &Apache::lonxml::get_param('height',$parstack,$safeeval);
                    198: 	my $start = &Apache::lonxml::get_param('start',$parstack,$safeeval);
                    199: 	my $end = &Apache::lonxml::get_param('end',$parstack,$safeeval);
                    200: 	my $color = &Apache::lonxml::get_param('color',$parstack,$safeeval);
                    201: 	my $thickness = &Apache::lonxml::get_param('thickness',$parstack,$safeeval);
                    202: 	my $filled = &Apache::lonxml::get_param('filled',$parstack,$safeeval);
1.3       albertel  203: 	my $i=$args{"cgi.$cgi_id.OBJCOUNT"}++;
1.1       albertel  204: 	$args{"cgi.$cgi_id.OBJ$i"}=
                    205: 	    join(':',($x,$y,$width,$height,$start,$end,$color,$thickness,
                    206: 		      $filled));
                    207: 	$args{"cgi.$cgi_id.OBJTYPE"}.='ARC:';
                    208:     }
                    209:     return $result;
                    210: }
                    211: 
                    212: sub end_arc {
                    213:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    214:     my $result;
                    215:     return $result;
                    216: }
                    217: 
1.2       albertel  218: sub start_fill {
1.1       albertel  219:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    220:     my $result;
                    221:     if ($target eq 'web' || $target eq 'tex') {
                    222: 	my $x = &Apache::lonxml::get_param('x',$parstack,$safeeval);
                    223: 	my $y = &Apache::lonxml::get_param('y',$parstack,$safeeval);
                    224: 	my $color = &Apache::lonxml::get_param('color',$parstack,$safeeval);
1.3       albertel  225: 	my $i=$args{"cgi.$cgi_id.OBJCOUNT"}++;
1.1       albertel  226: 	$args{"cgi.$cgi_id.OBJ$i"}=join(':',($x,$y,$color));
                    227: 	$args{"cgi.$cgi_id.OBJTYPE"}.='FILL:';
                    228:     }
                    229:     return $result;
                    230: }
                    231: 
1.2       albertel  232: sub end_fill {
1.1       albertel  233:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    234:     my $result;
                    235:     return $result;
                    236: }
                    237: 
1.7       albertel  238: my @polygon;
                    239: sub start_polygon {
                    240:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    241:     my $result;
                    242:     &Apache::lonxml::register('Apache::drawimage',('point'));
                    243:     if ($target eq 'web') {
                    244: 	undef(@polygon);
                    245:     }
                    246:     return $result;
                    247: }
                    248: 
                    249: sub end_polygon {
                    250:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    251:     my $result;    
                    252:     if ($target eq 'web') {
                    253: 	my $color=&Apache::lonxml::get_param('color',$parstack,$safeeval);
                    254: 	my $filled=&Apache::lonxml::get_param('filled',$parstack,$safeeval);
                    255: 	my $open=&Apache::lonxml::get_param('open',$parstack,$safeeval);
                    256: 	my $thickness = &Apache::lonxml::get_param('thickness',$parstack,
                    257: 						   $safeeval);
                    258: 	my $i=$args{"cgi.$cgi_id.OBJCOUNT"}++;
                    259: 	$args{"cgi.$cgi_id.OBJTYPE"}.='POLYGON:';
                    260: 	$args{"cgi.$cgi_id.OBJ$i"}=join(':',($color,$thickness,$open,$filled));
                    261: 	$args{"cgi.$cgi_id.OBJEXTRA$i"}=join('-',@polygon);
                    262:     }
                    263:     &Apache::lonxml::deregister('Apache::drawimage',('point'));
                    264:     return $result;
                    265: }
                    266: 
                    267: sub start_point {
                    268:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    269:     my $result;
                    270:     if ($target eq 'web') {
                    271: 	my $x = &Apache::lonxml::get_param('x',$parstack,$safeeval);
                    272:         my $y = &Apache::lonxml::get_param('y',$parstack,$safeeval);
                    273: 	push (@polygon,"($x,$y)");
                    274:     }
                    275:     return $result;
                    276: }
                    277: 
                    278: sub end_point {
                    279:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    280:     my $result;
                    281:     return $result;
                    282: }
                    283: 
                    284: sub start_image {
                    285:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    286:     my $result;
                    287:     if ($target eq 'web' || $target eq 'tex') {
                    288: 	&Apache::lonxml::startredirection();
                    289:     }
                    290:     return $result;
                    291: }
1.1       albertel  292: 
1.7       albertel  293: sub end_image {
                    294:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    295:     my $result;
                    296:     if ($target eq 'web' || $target eq 'tex') {
                    297: 	my $bgimg=&Apache::lonxml::endredirection();
                    298: 	my $x = &Apache::lonxml::get_param('x',$parstack,$safeeval);
                    299:         my $y = &Apache::lonxml::get_param('y',$parstack,$safeeval);
                    300: 	my $clipx = &Apache::lonxml::get_param('clipx',$parstack,$safeeval);
                    301:         my $clipy = &Apache::lonxml::get_param('clipy',$parstack,$safeeval);
                    302: 	my $clipwidth = 
                    303: 	    &Apache::lonxml::get_param('clipwidth',$parstack,$safeeval);
                    304:         my $clipheight = 
                    305: 	    &Apache::lonxml::get_param('clipheight',$parstack,$safeeval);
                    306: 	my $scaledwidth = 
                    307: 	    &Apache::lonxml::get_param('scaledwidth',$parstack,$safeeval);
                    308:         my $scaledheight = 
                    309: 	    &Apache::lonxml::get_param('scaledheight',$parstack,$safeeval);
                    310: 	my $transparent = 
                    311: 	    &Apache::lonxml::get_param('transparent',$parstack,$safeeval);
                    312: 	$bgimg=&Apache::imageresponse::clean_up_image($bgimg);
                    313: 	my $i=$args{"cgi.$cgi_id.OBJCOUNT"}++;
                    314: 	$args{"cgi.$cgi_id.OBJTYPE"}.='IMAGE:';
                    315: 	$args{"cgi.$cgi_id.OBJ$i"} = 
1.9       www       316: 	    join(':',($x,$y,&escape($bgimg),$transparent,
1.7       albertel  317: 		      $clipx,$clipy,$scaledwidth,$scaledheight,$clipwidth,$clipheight));
                    318:     }
                    319:     return $result;
                    320: }
1.1       albertel  321: 1;
                    322: __END__

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