Annotation of loncom/xml/lonplot.pm, revision 1.129

1.1       matthew     1: # The LearningOnline Network with CAPA
                      2: # Dynamic plot
                      3: #
1.129   ! albertel    4: # $Id: lonplot.pm,v 1.128 2007/08/09 06:25:43 albertel Exp $
1.1       matthew     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: #
1.35      matthew    28: 
1.1       matthew    29: package Apache::lonplot;
1.10      matthew    30: 
1.1       matthew    31: use strict;
1.89      matthew    32: use warnings FATAL=>'all';
                     33: no warnings 'uninitialized';
1.10      matthew    34: use Apache::File;
1.1       matthew    35: use Apache::response;
1.2       matthew    36: use Apache::lonxml;
1.20      matthew    37: use Apache::edit;
1.106     albertel   38: use Apache::lonnet;
1.113     www        39: use LONCAPA;
                     40:  
1.10      matthew    41: 
1.129   ! albertel   42: use vars qw/$weboutputformat $version/;
1.97      matthew    43: 
1.109     foxr       44: 
1.108     foxr       45: 
1.33      harris41   46: BEGIN {
1.97      matthew    47:     &Apache::lonxml::register('Apache::lonplot',('gnuplot'));
                     48:     #
                     49:     # Determine the version of GNUPLOT
                     50:     $weboutputformat = 'gif';
1.129   ! albertel   51:     my $versionstring = `gnuplot --version 2>/dev/null`;
        !            52:     ($version) = ($versionstring =~ /^gnuplot ([\d.]+)/);
        !            53:     if ($version >= 4) {
1.97      matthew    54:         $weboutputformat = 'png';
                     55:     }
1.108     foxr       56:     
                     57: }
                     58: 
1.1       matthew    59: 
1.10      matthew    60: ## 
                     61: ## Description of data structures:
                     62: ##
                     63: ##  %plot       %key    %axis
                     64: ## --------------------------
                     65: ##  height      title   color
                     66: ##  width       box     xmin
                     67: ##  bgcolor     pos     xmax
                     68: ##  fgcolor             ymin
                     69: ##  transparent         ymax
                     70: ##  grid
                     71: ##  border
                     72: ##  font
1.19      matthew    73: ##  align
1.10      matthew    74: ##
                     75: ##  @labels: $labels[$i] = \%label
                     76: ##           %label: text, xpos, ypos, justify
1.14      matthew    77: ##
1.10      matthew    78: ##  @curves: $curves[$i] = \%curve
1.14      matthew    79: ##           %curve: name, linestyle, ( function | data )
1.10      matthew    80: ##
                     81: ##  $curves[$i]->{'data'} = [ [x1,x2,x3,x4],
                     82: ##                            [y1,y2,y3,y4] ]
                     83: ##
1.21      matthew    84: 
                     85: ###################################################################
                     86: ##                                                               ##
                     87: ##        Tests used in checking the validitity of input         ##
                     88: ##                                                               ##
                     89: ###################################################################
1.29      matthew    90: 
1.32      matthew    91: my $max_str_len = 50;    # if a label, title, xlabel, or ylabel text
                     92:                          # is longer than this, it will be truncated.
                     93: 
1.29      matthew    94: my %linestyles = 
                     95:     (
                     96:      lines          => 2,     # Maybe this will be used in the future
                     97:      linespoints    => 2,     # to check on whether or not they have 
                     98:      dots	    => 2,     # supplied enough <data></data> fields
                     99:      points         => 2,     # to use the given line style.  But for
                    100:      steps	    => 2,     # now there are more important things 
                    101:      fsteps	    => 2,     # for me to deal with.
                    102:      histeps        => 2,
1.34      matthew   103:      errorbars	    => 3,
                    104:      xerrorbars	    => [3,4],
                    105:      yerrorbars	    => [3,4],
1.35      matthew   106:      xyerrorbars    => [4,6],
1.34      matthew   107:      boxes          => 3,
1.110     albertel  108:      filledcurves   => 2,
1.35      matthew   109:      vector	    => 4
1.29      matthew   110:     );		    
                    111: 
1.11      matthew   112: my $int_test       = sub {$_[0]=~s/\s+//g;$_[0]=~/^\d+$/};
1.19      matthew   113: my $real_test      = 
                    114:     sub {$_[0]=~s/\s+//g;$_[0]=~/^[+-]?\d*\.?\d*([eE][+-]\d+)?$/};
1.62      matthew   115: my $pos_real_test  =
                    116:     sub {$_[0]=~s/\s+//g;$_[0]=~/^[+]?\d*\.?\d*([eE][+-]\d+)?$/};
1.79      matthew   117: my $color_test     = sub {$_[0]=~s/\s+//g;$_[0]=~/^x[\da-fA-F]{6}$/};
1.1       matthew   118: my $onoff_test     = sub {$_[0]=~/^(on|off)$/};
1.15      matthew   119: my $key_pos_test   = sub {$_[0]=~/^(top|bottom|right|left|outside|below| )+$/};
1.119     albertel  120: my $sml_test       = sub {$_[0]=~/^(\d+|small|medium|large)$/};
1.29      matthew   121: my $linestyle_test = sub {exists($linestyles{$_[0]})};
1.67      matthew   122: my $words_test     = sub {$_[0]=~s/\s+/ /g;$_[0]=~/^([\w~!\@\#\$\%^&\*\(\)-=_\+\[\]\{\}:\;\'<>,\.\/\?\\]+ ?)+$/};
1.21      matthew   123: 
                    124: ###################################################################
                    125: ##                                                               ##
                    126: ##                      Attribute metadata                       ##
                    127: ##                                                               ##
                    128: ###################################################################
1.47      matthew   129: my @gnuplot_edit_order = 
1.123     albertel  130:     qw/alttag bgcolor fgcolor height width texwidth fontface font texfont
                    131:     transparent grid samples 
                    132:     border align plotcolor plottype gridtype lmargin rmargin
1.115     albertel  133:     tmargin bmargin major_ticscale minor_ticscale boxwidth gridlayer fillstyle
1.110     albertel  134:     pattern solid/;
1.101     matthew   135: 
1.105     matthew   136: my $margin_choices = ['default',0..20];
1.48      matthew   137: 
1.47      matthew   138: my %gnuplot_defaults = 
1.1       matthew   139:     (
1.64      matthew   140:      alttag       => {
                    141: 	 default     => 'dynamically generated plot',
                    142: 	 test        => $words_test,
1.120     albertel  143: 	 description => 'Brief description of the plot',
1.64      matthew   144:       	 edit_type   => 'entry',
                    145: 	 size        => '40'
                    146: 	 },
1.20      matthew   147:      height       => {
1.65      matthew   148: 	 default     => 300,
1.20      matthew   149: 	 test        => $int_test,
1.120     albertel  150: 	 description => 'Height of image (pixels)',
1.38      matthew   151:       	 edit_type   => 'entry',
                    152: 	 size        => '10'
1.20      matthew   153: 	 },
                    154:      width        => {
1.65      matthew   155: 	 default     => 400,
1.20      matthew   156: 	 test        => $int_test,
1.120     albertel  157: 	 description => 'Width of image (pixels)',
1.38      matthew   158: 	 edit_type   => 'entry',
                    159: 	 size        => '10'
1.20      matthew   160: 	 },
                    161:      bgcolor      => {
                    162: 	 default     => 'xffffff',
                    163: 	 test        => $color_test, 
1.120     albertel  164: 	 description => 'Background color of image (xffffff)',
1.38      matthew   165: 	 edit_type   => 'entry',
                    166: 	 size        => '10'
1.20      matthew   167: 	 },
                    168:      fgcolor      => {
                    169: 	 default     => 'x000000',
                    170: 	 test        => $color_test,
1.120     albertel  171: 	 description => 'Foreground color of image (x000000)',
1.38      matthew   172: 	 edit_type   => 'entry',
                    173: 	 size        => '10'
1.20      matthew   174: 	 },
                    175:      transparent  => {
                    176: 	 default     => 'off',
                    177: 	 test        => $onoff_test, 
1.34      matthew   178: 	 description => 'Transparent image',
1.45      matthew   179: 	 edit_type   => 'onoff'
1.20      matthew   180: 	 },
                    181:      grid         => {
1.65      matthew   182: 	 default     => 'on',
1.20      matthew   183: 	 test        => $onoff_test, 
1.34      matthew   184: 	 description => 'Display grid',
1.45      matthew   185: 	 edit_type   => 'onoff'
1.20      matthew   186: 	 },
1.110     albertel  187:      gridlayer    => {
                    188: 	 default     => 'off',
                    189: 	 test        => $onoff_test, 
                    190: 	 description => 'Display grid front layer over filled boxes or filled curves',
                    191: 	 edit_type   => 'onoff'
                    192: 	 },
                    193:      box_border   => {
                    194: 	 default     => 'noborder',
                    195: 	 test        => sub {$_[0]=~/^(noborder|border)$/},
                    196: 	 description => 'Draw border for boxes',
                    197: 	 edit_type   => 'choice',
                    198: 	 choices     => ['border','noborder']
                    199: 	 },
1.20      matthew   200:      border       => {
                    201: 	 default     => 'on',
                    202: 	 test        => $onoff_test, 
1.34      matthew   203: 	 description => 'Draw border around plot',
1.45      matthew   204: 	 edit_type   => 'onoff'
1.20      matthew   205: 	 },
                    206:      font         => {
1.119     albertel  207: 	 default     => '9',
1.20      matthew   208: 	 test        => $sml_test,
1.125     albertel  209: 	 description => 'Font size to use in web output (pts)',
1.20      matthew   210: 	 edit_type   => 'choice',
1.126     albertel  211: 	 choices     => [['5','5 (small)'],'6','7','8',['9','9 (medium)'],'10',['11','11 (large)'],'12','15']
1.20      matthew   212: 	 },
1.120     albertel  213:      fontface     => {
                    214:         default     => 'sans-serif',
                    215:         test        => sub {$_[0]=~/^(sans-serif|serif|classic)$/},
                    216:         description => 'Type of font to use',
                    217:         edit_type   => 'choice',
                    218:         choices     => ['sans-serif','serif', 'classic']
                    219:         },
1.110     albertel  220:      samples      => {
1.77      matthew   221: 	 default     => '100',
                    222: 	 test        => $int_test,
                    223: 	 description => 'Number of samples for non-data plots',
                    224: 	 edit_type   => 'choice',
                    225: 	 choices     => ['100','200','500','1000','2000','5000']
                    226: 	 },
1.20      matthew   227:      align        => {
1.116     albertel  228: 	 default     => 'middle',
                    229: 	 test        => sub {$_[0]=~/^(left|right|middle|center)$/},
1.120     albertel  230: 	 description => 'Alignment for image in HTML',
1.20      matthew   231: 	 edit_type   => 'choice',
1.116     albertel  232: 	 choices     => ['left','right','middle']
1.82      matthew   233: 	 },
                    234:      texwidth     => {
                    235:          default     => '93',
                    236:          test        => $int_test,
                    237:          description => 'Width of plot when printed (mm)',
                    238:          edit_type   => 'entry',
                    239:          size        => '5'
                    240:          },
1.110     albertel  241:      texfont      => {
1.92      matthew   242:          default     => '22',
                    243:          test        => $int_test,
                    244:          description => 'Font size to use in TeX output (pts):',
                    245:          edit_type   => 'choice',
1.96      matthew   246:          choices     => [qw/8 10 12 14 16 18 20 22 24 26 28 30 32 34 36/],
1.92      matthew   247:          },
1.110     albertel  248:      plotcolor    => {
1.105     matthew   249:          default     => 'monochrome',
                    250:          test        => sub {$_[0]=~/^(monochrome|color|colour)$/},
                    251:          description => 'Color setting for printing:',
                    252:          edit_type   => 'choice',
                    253:          choices     => [qw/monochrome color colour/],
                    254:          },
1.110     albertel  255:      pattern      => {
                    256: 	 default     => '',
                    257: 	 test        => $int_test,
1.120     albertel  258: 	 description => 'Pattern value for boxes:',
1.110     albertel  259: 	 edit_type   => 'choice',
                    260:          choices     => [0,1,2,3,4,5,6]
                    261:          },
                    262:      solid        => {
                    263:          default     => 0,
                    264:          test        => $real_test,
                    265:          description => 'The density of fill style for boxes',
                    266:          edit_type   => 'entry',
                    267:          size        => '5'
                    268:          },
                    269:      fillstyle    => {
                    270: 	 default     => 'empty',
                    271: 	 test        => sub {$_[0]=~/^(empty|solid|pattern)$/},
                    272: 	 description => 'Filled style for boxes:',
                    273: 	 edit_type   => 'choice',
                    274:          choices     => ['empty','solid','pattern']
                    275:          },
                    276:      plottype     => {
1.87      matthew   277: 	 default     => 'Cartesian',
                    278: 	 test        => sub {$_[0]=~/^(Polar|Cartesian)$/},
                    279: 	 description => 'Plot type:',
                    280: 	 edit_type   => 'choice',
1.94      matthew   281:          choices     => ['Cartesian','Polar']
1.87      matthew   282:          },
1.115     albertel  283:      gridtype     => {
                    284: 	 default     => 'Cartesian',
1.118     albertel  285: 	 test        => sub {$_[0]=~/^(Polar|Cartesian|Linear-Log|Log-Linear|Log-Log)$/},
1.115     albertel  286: 	 description => 'Grid type:',
                    287: 	 edit_type   => 'choice',
1.118     albertel  288:          choices     => ['Cartesian','Polar','Linear-Log','Log-Linear','Log-Log']
1.115     albertel  289:          },
1.110     albertel  290:      lmargin      => {
1.101     matthew   291: 	 default     => 'default',
                    292: 	 test        => sub {$_[0]=~/^(default|\d+)$/},
                    293: 	 description => 'Left margin width (pts):',
                    294: 	 edit_type   => 'choice',
                    295:          choices     => $margin_choices,
                    296:          },
1.110     albertel  297:      rmargin      => {
1.101     matthew   298: 	 default     => 'default',
                    299: 	 test        => sub {$_[0]=~/^(default|\d+)$/},
                    300: 	 description => 'Right margin width (pts):',
                    301: 	 edit_type   => 'choice',
                    302:          choices     => $margin_choices,
                    303:          },
1.110     albertel  304:      tmargin      => {
1.101     matthew   305: 	 default     => 'default',
                    306: 	 test        => sub {$_[0]=~/^(default|\d+)$/},
                    307: 	 description => 'Top margin width (pts):',
                    308: 	 edit_type   => 'choice',
                    309:          choices     => $margin_choices,
                    310:          },
1.110     albertel  311:      bmargin      => {
1.101     matthew   312: 	 default     => 'default',
                    313: 	 test        => sub {$_[0]=~/^(default|\d+)$/},
1.104     www       314: 	 description => 'Bottom margin width (pts):',
1.101     matthew   315: 	 edit_type   => 'choice',
                    316:          choices     => $margin_choices,
                    317:          },
1.110     albertel  318:      boxwidth     => {
                    319: 	 default     => '',
                    320: 	 test        => $real_test, 
1.120     albertel  321: 	 description => 'Width of boxes, default is auto',
1.110     albertel  322: 	 edit_type   => 'entry',
                    323:          size        => '5'
                    324:          },
1.101     matthew   325:      major_ticscale  => {
                    326:          default     => '1',
                    327:          test        => $real_test,
                    328:          description => 'Size of major tic marks (plot coordinates)',
                    329:          edit_type   => 'entry',
                    330:          size        => '5'
                    331:          },
                    332:      minor_ticscale  => {
                    333:          default     => '0.5',
                    334:          test        => $real_test,
                    335:          description => 'Size of minor tic mark (plot coordinates)',
                    336:          edit_type   => 'entry',
                    337:          size        => '5'
                    338:          },
1.1       matthew   339:      );
                    340: 
                    341: my %key_defaults = 
                    342:     (
1.20      matthew   343:      title => { 
                    344: 	 default => '',
                    345: 	 test => $words_test,
                    346: 	 description => 'Title of key',
1.38      matthew   347: 	 edit_type   => 'entry',
                    348: 	 size        => '40'
1.20      matthew   349: 	 },
                    350:      box   => { 
                    351: 	 default => 'off',
                    352: 	 test => $onoff_test,
                    353: 	 description => 'Draw a box around the key?',
1.45      matthew   354: 	 edit_type   => 'onoff'
1.20      matthew   355: 	 },
                    356:      pos   => { 
                    357: 	 default => 'top right', 
                    358: 	 test => $key_pos_test, 
1.120     albertel  359: 	 description => 'Position of the key on the plot',
1.20      matthew   360: 	 edit_type   => 'choice',
                    361: 	 choices     => ['top left','top right','bottom left','bottom right',
                    362: 			 'outside','below']
                    363: 	 }
1.1       matthew   364:      );
                    365: 
                    366: my %label_defaults = 
                    367:     (
1.20      matthew   368:      xpos    => {
                    369: 	 default => 0,
                    370: 	 test => $real_test,
1.120     albertel  371: 	 description => 'X position of label (graph coordinates)',
1.38      matthew   372: 	 edit_type   => 'entry',
                    373: 	 size        => '10'
1.20      matthew   374: 	 },
                    375:      ypos    => {
                    376: 	 default => 0, 
                    377: 	 test => $real_test,
1.120     albertel  378: 	 description => 'Y position of label (graph coordinates)',
1.38      matthew   379: 	 edit_type   => 'entry',
                    380: 	 size        => '10'
1.20      matthew   381: 	 },
                    382:      justify => {
                    383: 	 default => 'left',    
                    384: 	 test => sub {$_[0]=~/^(left|right|center)$/},
                    385: 	 description => 'justification of the label text on the plot',
                    386: 	 edit_type   => 'choice',
                    387: 	 choices     => ['left','right','center']
                    388:      }
1.1       matthew   389:      );
                    390: 
1.89      matthew   391: my @tic_edit_order = ('location','mirror','start','increment','end',
                    392:                       'minorfreq');
1.45      matthew   393: my %tic_defaults =
                    394:     (
                    395:      location => {
                    396: 	 default => 'border', 
                    397: 	 test => sub {$_[0]=~/^(border|axis)$/},
1.90      matthew   398: 	 description => 'Location of major tic marks',
1.45      matthew   399: 	 edit_type   => 'choice',
                    400: 	 choices     => ['border','axis']
                    401: 	 },
                    402:      mirror => {
                    403: 	 default => 'on', 
                    404: 	 test => $onoff_test,
1.120     albertel  405: 	 description => 'Mirror tics on opposite axis?',
1.45      matthew   406: 	 edit_type   => 'onoff'
                    407: 	 },
                    408:      start => {
                    409: 	 default => '-10.0',
                    410: 	 test => $real_test,
1.90      matthew   411: 	 description => 'Start major tics at',
1.45      matthew   412: 	 edit_type   => 'entry',
                    413: 	 size        => '10'
                    414: 	 },
                    415:      increment => {
                    416: 	 default => '1.0',
                    417: 	 test => $real_test,
1.90      matthew   418: 	 description => 'Place a major tic every',
1.45      matthew   419: 	 edit_type   => 'entry',
                    420: 	 size        => '10'
                    421: 	 },
                    422:      end => {
                    423: 	 default => ' 10.0',
                    424: 	 test => $real_test,
1.90      matthew   425: 	 description => 'Stop major tics at ',
1.45      matthew   426: 	 edit_type   => 'entry',
                    427: 	 size        => '10'
                    428: 	 },
1.89      matthew   429:      minorfreq => {
                    430: 	 default => '0',
                    431: 	 test => $int_test,
1.98      matthew   432: 	 description => 'Number of minor tics per major tic mark',
1.89      matthew   433: 	 edit_type   => 'entry',
                    434: 	 size        => '10'
                    435: 	 },         
1.45      matthew   436:      );
                    437: 
1.65      matthew   438: my @axis_edit_order = ('color','xmin','xmax','ymin','ymax');
1.1       matthew   439: my %axis_defaults = 
                    440:     (
1.28      matthew   441:      color   => {
1.20      matthew   442: 	 default => 'x000000', 
                    443: 	 test => $color_test,
1.120     albertel  444: 	 description => 'Color of grid lines (x000000)',
1.38      matthew   445: 	 edit_type   => 'entry',
                    446: 	 size        => '10'
1.20      matthew   447: 	 },
                    448:      xmin      => {
                    449: 	 default => '-10.0',
                    450: 	 test => $real_test,
1.120     albertel  451: 	 description => 'Minimum x-value shown in plot',
1.38      matthew   452: 	 edit_type   => 'entry',
                    453: 	 size        => '10'
1.20      matthew   454: 	 },
                    455:      xmax      => {
                    456: 	 default => ' 10.0',
                    457: 	 test => $real_test,
1.120     albertel  458: 	 description => 'Maximum x-value shown in plot',	 
1.38      matthew   459: 	 edit_type   => 'entry',
                    460: 	 size        => '10'
1.20      matthew   461: 	 },
                    462:      ymin      => {
                    463: 	 default => '-10.0',
                    464: 	 test => $real_test,
1.120     albertel  465: 	 description => 'Minimum y-value shown in plot',	 
1.38      matthew   466: 	 edit_type   => 'entry',
                    467: 	 size        => '10'
1.20      matthew   468: 	 },
                    469:      ymax      => {
                    470: 	 default => ' 10.0',
                    471: 	 test => $real_test,
1.120     albertel  472: 	 description => 'Maximum y-value shown in plot',	 
1.38      matthew   473: 	 edit_type   => 'entry',
                    474: 	 size        => '10'
1.20      matthew   475: 	 }
1.1       matthew   476:      );
                    477: 
1.119     albertel  478: my @curve_edit_order = ('color','name','linestyle','linewidth','pointtype','pointsize','limit');
1.60      matthew   479: 
1.1       matthew   480: my %curve_defaults = 
                    481:     (
1.20      matthew   482:      color     => {
                    483: 	 default => 'x000000',
                    484: 	 test => $color_test,
1.120     albertel  485: 	 description => 'Color of curve (x000000)',
1.38      matthew   486: 	 edit_type   => 'entry',
                    487: 	 size        => '10'
1.20      matthew   488: 	 },
                    489:      name      => {
                    490: 	 default => '',
                    491: 	 test => $words_test,
1.120     albertel  492: 	 description => 'Name of curve to appear in key',
1.38      matthew   493: 	 edit_type   => 'entry',
                    494: 	 size        => '20'
1.20      matthew   495: 	 },
                    496:      linestyle => {
                    497: 	 default => 'lines',
                    498: 	 test => $linestyle_test,
1.35      matthew   499: 	 description => 'Line style',
1.20      matthew   500: 	 edit_type   => 'choice',
1.38      matthew   501: 	 choices     => [keys(%linestyles)]
1.60      matthew   502: 	 },
1.119     albertel  503:      linewidth => {
1.126     albertel  504:          default     => 2,
1.119     albertel  505:          test        => $int_test,
                    506:          description => 'Line width (may not apply to all line styles)',
                    507:          edit_type   => 'choice',
                    508:          choices     => [1,2,3,4,5,6,7,8,9,10]
                    509:          },
1.60      matthew   510:      pointsize => {
                    511:          default     => 1,
1.62      matthew   512:          test        => $pos_real_test,
1.120     albertel  513:          description => 'Point size (may not apply to all line styles)',
1.62      matthew   514:          edit_type   => 'entry',
                    515:          size        => '5'
                    516:          },
                    517:      pointtype => {
                    518:          default     => 1,
1.60      matthew   519:          test        => $int_test,
1.120     albertel  520:          description => 'Point type (may not apply to all line styles)',
1.60      matthew   521:          edit_type   => 'choice',
1.62      matthew   522:          choices     => [0,1,2,3,4,5,6]
1.110     albertel  523:          },
                    524:      limit     => {
                    525:          default     => 'closed',
                    526: 	 test        => sub {$_[0]=~/^(closed|x1|x2|y1|y2)$/},
1.120     albertel  527:          description => 'Point to fill -- for filledcurves',
1.110     albertel  528:          edit_type   => 'choice',
                    529:          choices     => ['closed','x1','x2','y1','y2']
                    530:          },
1.1       matthew   531:      );
                    532: 
1.21      matthew   533: ###################################################################
                    534: ##                                                               ##
                    535: ##                    parsing and edit rendering                 ##
                    536: ##                                                               ##
                    537: ###################################################################
1.107     foxr      538: 
                    539: undef %Apache::lonplot::plot;
                    540: my (%key,%axis,$title,$xlabel,$ylabel,@labels,@curves,%xtics,%ytics);
1.1       matthew   541: 
1.47      matthew   542: sub start_gnuplot {
1.107     foxr      543:     undef(%Apache::lonplot::plot);   undef(%key);    undef(%axis);
1.89      matthew   544:     undef($title);  undef($xlabel); undef($ylabel);
                    545:     undef(@labels); undef(@curves);
                    546:     undef(%xtics);  undef(%ytics);
1.6       matthew   547:     #
1.1       matthew   548:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    549:     my $result='';
1.25      matthew   550:     &Apache::lonxml::register('Apache::lonplot',
1.45      matthew   551: 	     ('title','xlabel','ylabel','key','axis','label','curve',
                    552: 	      'xtics','ytics'));
1.29      matthew   553:     push (@Apache::lonxml::namespace,'lonplot');
1.51      matthew   554:     if ($target eq 'web' || $target eq 'tex') {
1.107     foxr      555: 	&get_attributes(\%Apache::lonplot::plot,\%gnuplot_defaults,$parstack,$safeeval,
1.17      matthew   556: 			$tagstack->[-1]);
1.20      matthew   557:     } elsif ($target eq 'edit') {
1.47      matthew   558: 	$result .= &Apache::edit::tag_start($target,$token,'GnuPlot');
                    559: 	$result .= &edit_attributes($target,$token,\%gnuplot_defaults,
1.116     albertel  560: 				    \@gnuplot_edit_order)
                    561: 	    .&Apache::edit::end_row()
                    562: 	    .&Apache::edit::start_spanning_row();
1.20      matthew   563:     } elsif ($target eq 'modified') {
                    564: 	my $constructtag=&Apache::edit::get_new_args
1.47      matthew   565: 	    ($token,$parstack,$safeeval,keys(%gnuplot_defaults));
1.20      matthew   566: 	if ($constructtag) {
                    567: 	    $result = &Apache::edit::rebuild_tag($token);
                    568: 	}
1.4       matthew   569:     }
1.21      matthew   570:     return $result;
1.1       matthew   571: }
                    572: 
1.47      matthew   573: sub end_gnuplot {
1.1       matthew   574:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    575:     pop @Apache::lonxml::namespace;
1.4       matthew   576:     &Apache::lonxml::deregister('Apache::lonplot',
                    577: 	('title','xlabel','ylabel','key','axis','label','curve'));
                    578:     my $result = '';
1.56      albertel  579:     my $randnumber;
                    580:     # need to call rand everytime start_script would evaluate, as the
                    581:     # safe space rand number generator and the global rand generator 
1.95      www       582:     # are not separate
1.56      albertel  583:     if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
                    584: 	$target eq 'answer') {
                    585:       $randnumber=int(rand(1000));
                    586:     }
1.51      matthew   587:     if ($target eq 'web' || $target eq 'tex') {
1.21      matthew   588: 	&check_inputs(); # Make sure we have all the data we need
1.13      matthew   589: 	##
                    590: 	## Determine filename
1.4       matthew   591: 	my $tmpdir = '/home/httpd/perl/tmp/';
1.106     albertel  592: 	my $filename = $env{'user.name'}.'_'.$env{'user.domain'}.
1.69      matthew   593: 	    '_'.time.'_'.$$.$randnumber.'_plot';
1.4       matthew   594: 	## Write the plot description to the file
1.51      matthew   595: 	&write_gnuplot_file($tmpdir,$filename,$target);
1.113     www       596: 	$filename = &escape($filename);
1.4       matthew   597: 	## return image tag for the plot
1.51      matthew   598: 	if ($target eq 'web') {
                    599: 	    $result .= <<"ENDIMAGE";
1.114     albertel  600: <img src    = "/cgi-bin/plot.$weboutputformat?file=$filename.data" 
1.107     foxr      601:      width  = "$Apache::lonplot::plot{'width'}"
                    602:      height = "$Apache::lonplot::plot{'height'}"
                    603:      align  = "$Apache::lonplot::plot{'align'}"
                    604:      alt    = "$Apache::lonplot::plot{'alttag'}" />
1.12      matthew   605: ENDIMAGE
1.51      matthew   606:         } elsif ($target eq 'tex') {
1.107     foxr      607: 	    &Apache::lonxml::debug(" gnuplot wid = $Apache::lonplot::plot{'width'}");
                    608: 	    &Apache::lonxml::debug(" gnuplot ht  = $Apache::lonplot::plot{'height'}");
1.91      albertel  609: 	    #might be inside the safe space, register the URL for later
                    610: 	    &Apache::lonxml::register_ssi("/cgi-bin/plot.gif?file=$filename.data&output=eps");
1.111     albertel  611: 	    $result  = "%DYNAMICIMAGE:$Apache::lonplot::plot{'width'}:$Apache::lonplot::plot{'height'}:$Apache::lonplot::plot{'texwidth'}\n";
1.109     foxr      612: 	    $result .= '\graphicspath{{/home/httpd/perl/tmp/}}'."\n";
1.113     www       613: 	    $result .= '\includegraphics[width='.$Apache::lonplot::plot{'texwidth'}.' mm]{'.&unescape($filename).'.eps}';
1.51      matthew   614: 	}
1.20      matthew   615:     } elsif ($target eq 'edit') {
1.21      matthew   616: 	$result.=&Apache::edit::tag_end($target,$token);
1.4       matthew   617:     }
1.1       matthew   618:     return $result;
                    619: }
1.2       matthew   620: 
1.45      matthew   621: 
                    622: ##--------------------------------------------------------------- xtics
                    623: sub start_xtics {
                    624:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    625:     my $result='';
1.51      matthew   626:     if ($target eq 'web' || $target eq 'tex') {
1.45      matthew   627: 	&get_attributes(\%xtics,\%tic_defaults,$parstack,$safeeval,
                    628: 		    $tagstack->[-1]);
                    629:     } elsif ($target eq 'edit') {
                    630: 	$result .= &Apache::edit::tag_start($target,$token,'xtics');
                    631: 	$result .= &edit_attributes($target,$token,\%tic_defaults,
                    632: 				    \@tic_edit_order);
                    633:     } elsif ($target eq 'modified') {
                    634: 	my $constructtag=&Apache::edit::get_new_args
                    635: 	    ($token,$parstack,$safeeval,keys(%tic_defaults));
                    636: 	if ($constructtag) {
                    637: 	    $result = &Apache::edit::rebuild_tag($token);
                    638: 	}
                    639:     }
                    640:     return $result;
                    641: }
                    642: 
                    643: sub end_xtics {
                    644:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    645:     my $result = '';
1.51      matthew   646:     if ($target eq 'web' || $target eq 'tex') {
1.45      matthew   647:     } elsif ($target eq 'edit') {
                    648: 	$result.=&Apache::edit::tag_end($target,$token);
                    649:     }
                    650:     return $result;
                    651: }
                    652: 
                    653: ##--------------------------------------------------------------- ytics
                    654: sub start_ytics {
                    655:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    656:     my $result='';
1.51      matthew   657:     if ($target eq 'web' || $target eq 'tex') {
1.45      matthew   658: 	&get_attributes(\%ytics,\%tic_defaults,$parstack,$safeeval,
                    659: 		    $tagstack->[-1]);
                    660:     } elsif ($target eq 'edit') {
                    661: 	$result .= &Apache::edit::tag_start($target,$token,'ytics');
                    662: 	$result .= &edit_attributes($target,$token,\%tic_defaults,
                    663: 				    \@tic_edit_order);
                    664:     } elsif ($target eq 'modified') {
                    665: 	my $constructtag=&Apache::edit::get_new_args
                    666: 	    ($token,$parstack,$safeeval,keys(%tic_defaults));
                    667: 	if ($constructtag) {
                    668: 	    $result = &Apache::edit::rebuild_tag($token);
                    669: 	}
                    670:     }
                    671:     return $result;
                    672: }
                    673: 
                    674: sub end_ytics {
                    675:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    676:     my $result = '';
1.51      matthew   677:     if ($target eq 'web' || $target eq 'tex') {
1.45      matthew   678:     } elsif ($target eq 'edit') {
                    679: 	$result.=&Apache::edit::tag_end($target,$token);
                    680:     }
                    681:     return $result;
                    682: }
                    683: 
1.119     albertel  684: ##-----------------------------------------------------------------font
1.120     albertel  685: my %font_properties =
                    686:     (
                    687:      'classic'    => {
                    688: 	 face       => 'classic',
                    689: 	 file       => 'DejaVuSansMono-Bold',
                    690: 	 printname  => 'Helvetica',
1.121     albertel  691: 	 tex_no_file => 1,
1.120     albertel  692:      },
                    693:      'sans-serif' => {
                    694: 	 face       => 'sans-serif',
                    695: 	 file       => 'DejaVuSans',
                    696: 	 printname  => 'DejaVuSans',
                    697:      },
                    698:      'serif'      => {
                    699: 	 face       => 'serif',
                    700: 	 file       => 'DejaVuSerif',
                    701: 	 printname  => 'DejaVuSerif',
                    702:      },
                    703:      );
                    704: 
1.119     albertel  705: sub get_font {
1.124     albertel  706:     my ($target) = @_;
1.120     albertel  707:     my ($size, $selected_font);
                    708: 
1.119     albertel  709:     if ( $Apache::lonplot::plot{'font'} =~ /^(small|medium|large)/) {
1.120     albertel  710: 	$selected_font = $font_properties{'classic'};
1.119     albertel  711: 	if ( $Apache::lonplot::plot{'font'} eq 'small') {
                    712: 	    $size = '5';
                    713: 	} elsif ( $Apache::lonplot::plot{'font'} eq 'medium') {
                    714: 	    $size = '9';
                    715: 	} elsif ( $Apache::lonplot::plot{'font'} eq 'large') {
1.126     albertel  716: 	    $size = '11';
1.119     albertel  717: 	} else {
                    718: 	    $size = '9';
                    719: 	}
                    720:     } else {
1.122     albertel  721: 	$size = $Apache::lonplot::plot{'font'};
1.120     albertel  722: 	$selected_font = $font_properties{$Apache::lonplot::plot{'fontface'}};
1.119     albertel  723:     }
1.124     albertel  724:     if ($target eq 'tex' && defined($Apache::lonplot::plot{'texfont'})) {
                    725: 	$size = $Apache::lonplot::plot{'texfont'};
                    726:     }
1.120     albertel  727:     return ($size, $selected_font);
1.119     albertel  728: }
1.45      matthew   729: 
1.1       matthew   730: ##----------------------------------------------------------------- key
                    731: sub start_key {
                    732:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    733:     my $result='';
1.51      matthew   734:     if ($target eq 'web' || $target eq 'tex') {
1.17      matthew   735: 	&get_attributes(\%key,\%key_defaults,$parstack,$safeeval,
1.11      matthew   736: 		    $tagstack->[-1]);
1.20      matthew   737:     } elsif ($target eq 'edit') {
1.25      matthew   738: 	$result .= &Apache::edit::tag_start($target,$token,'Plot Key');
1.21      matthew   739: 	$result .= &edit_attributes($target,$token,\%key_defaults);
1.20      matthew   740:     } elsif ($target eq 'modified') {
                    741: 	my $constructtag=&Apache::edit::get_new_args
1.24      matthew   742: 	    ($token,$parstack,$safeeval,keys(%key_defaults));
1.20      matthew   743: 	if ($constructtag) {
                    744: 	    $result = &Apache::edit::rebuild_tag($token);
                    745: 	}
1.4       matthew   746:     }
1.1       matthew   747:     return $result;
                    748: }
                    749: 
                    750: sub end_key {
                    751:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    752:     my $result = '';
1.51      matthew   753:     if ($target eq 'web' || $target eq 'tex') {
1.20      matthew   754:     } elsif ($target eq 'edit') {
1.21      matthew   755: 	$result.=&Apache::edit::tag_end($target,$token);
1.4       matthew   756:     }
1.1       matthew   757:     return $result;
                    758: }
1.21      matthew   759: 
1.128     albertel  760: sub parse_label {
                    761:     my ($target,$text) = @_;
                    762:     my $parser=HTML::LCParser->new(\$text);
                    763:     my $result;
                    764:     while (my $token=$parser->get_token) {
                    765: 	if ($token->[0] eq 'S') {
                    766: 	    if ($token->[1] eq 'sub') {
                    767: 		$result .= '_{';
                    768: 	    } elsif ($token->[1] eq 'sup') {
                    769: 		$result .= '^{';
                    770: 	    } else {
                    771: 		$result .= $token->[4];
                    772: 	    }
                    773: 	} elsif ($token->[0] eq 'E') {
                    774: 	    if ($token->[1] eq 'sub'
                    775: 		|| $token->[1] eq 'sup') {
                    776: 		$result .= '}';
                    777: 	    } else {
                    778: 		$result .= $token->[2];
                    779: 	    }
                    780: 	} elsif ($token->[0] eq 'T') {
                    781: 	    $result .= &replace_entities($target,$token->[1]);
                    782: 	}
                    783:     }
                    784:     return $result;
                    785: }
                    786: 
                    787: 
                    788: my %lookup = 
                    789:     ('(pi|#960)' => {'tex' => '{/Symbol p}', 'web' => "\x{3C0}"},);
                    790: 
                    791: sub replace_entities {
                    792:     my ($target,$text) = @_;
                    793:     $text =~ s{([_^~\{\}]|\\\\)}{\\\\$1}g;
                    794:     while (my ($re, $replace) = each(%lookup)) {
                    795: 	$text =~ s/&$re;/$replace->{$target}/g;
                    796:     }
                    797:     $text =~ s{(&)}{\\\\$1}g;
                    798:     return $text;
1.127     albertel  799: }
                    800: 
1.1       matthew   801: ##------------------------------------------------------------------- title
                    802: sub start_title {
                    803:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    804:     my $result='';
1.51      matthew   805:     if ($target eq 'web' || $target eq 'tex') {
1.112     albertel  806: 	$title = &Apache::lonxml::get_all_text("/title",$parser,$style);
1.58      matthew   807: 	$title=&Apache::run::evaluate($title,$safeeval,$$parstack[-1]);
1.49      matthew   808: 	$title =~ s/\n/ /g;
1.32      matthew   809: 	if (length($title) > $max_str_len) {
                    810: 	    $title = substr($title,0,$max_str_len);
                    811: 	}
1.128     albertel  812: 	$title = &parse_label($target,$title);
1.20      matthew   813:     } elsif ($target eq 'edit') {
1.25      matthew   814: 	$result.=&Apache::edit::tag_start($target,$token,'Plot Title');
1.112     albertel  815: 	my $text=&Apache::lonxml::get_all_text("/title",$parser,$style);
1.116     albertel  816: 	$result.=&Apache::edit::editline('',$text,'',60);
1.20      matthew   817:     } elsif ($target eq 'modified') {
1.42      matthew   818: 	$result.=&Apache::edit::rebuild_tag($token);
1.93      albertel  819: 	$result.=&Apache::edit::modifiedfield("/title",$parser);
1.4       matthew   820:     }
1.1       matthew   821:     return $result;
                    822: }
                    823: 
                    824: sub end_title {
                    825:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    826:     my $result = '';
1.51      matthew   827:     if ($target eq 'web' || $target eq 'tex') {
1.20      matthew   828:     } elsif ($target eq 'edit') {
1.27      matthew   829: 	$result.=&Apache::edit::tag_end($target,$token);
1.4       matthew   830:     }
1.1       matthew   831:     return $result;
                    832: }
                    833: ##------------------------------------------------------------------- xlabel
                    834: sub start_xlabel {
                    835:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    836:     my $result='';
1.51      matthew   837:     if ($target eq 'web' || $target eq 'tex') {
1.112     albertel  838: 	$xlabel = &Apache::lonxml::get_all_text("/xlabel",$parser,$style);
1.58      matthew   839: 	$xlabel=&Apache::run::evaluate($xlabel,$safeeval,$$parstack[-1]);
1.49      matthew   840: 	$xlabel =~ s/\n/ /g;
1.32      matthew   841: 	if (length($xlabel) > $max_str_len) {
                    842: 	    $xlabel = substr($xlabel,0,$max_str_len);
                    843: 	}
1.128     albertel  844: 	$xlabel = &parse_label($target,$xlabel);
1.20      matthew   845:     } elsif ($target eq 'edit') {
1.25      matthew   846: 	$result.=&Apache::edit::tag_start($target,$token,'Plot Xlabel');
1.112     albertel  847: 	my $text=&Apache::lonxml::get_all_text("/xlabel",$parser,$style);
1.116     albertel  848: 	$result.=&Apache::edit::editline('',$text,'',60);
1.20      matthew   849:     } elsif ($target eq 'modified') {
1.42      matthew   850: 	$result.=&Apache::edit::rebuild_tag($token);	
1.93      albertel  851: 	$result.=&Apache::edit::modifiedfield("/xlabel",$parser);
1.4       matthew   852:     }
1.1       matthew   853:     return $result;
                    854: }
                    855: 
                    856: sub end_xlabel {
                    857:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    858:     my $result = '';
1.51      matthew   859:     if ($target eq 'web' || $target eq 'tex') {
1.20      matthew   860:     } elsif ($target eq 'edit') {
1.27      matthew   861: 	$result.=&Apache::edit::tag_end($target,$token);
1.4       matthew   862:     }
1.1       matthew   863:     return $result;
                    864: }
1.21      matthew   865: 
1.1       matthew   866: ##------------------------------------------------------------------- ylabel
                    867: sub start_ylabel {
                    868:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    869:     my $result='';
1.51      matthew   870:     if ($target eq 'web' || $target eq 'tex') {
1.112     albertel  871: 	$ylabel = &Apache::lonxml::get_all_text("/ylabel",$parser,$style);
1.58      matthew   872: 	$ylabel = &Apache::run::evaluate($ylabel,$safeeval,$$parstack[-1]);
1.49      matthew   873: 	$ylabel =~ s/\n/ /g;
1.32      matthew   874: 	if (length($ylabel) > $max_str_len) {
                    875: 	    $ylabel = substr($ylabel,0,$max_str_len);
                    876: 	}
1.128     albertel  877: 	$ylabel = &parse_label($target,$ylabel);
1.20      matthew   878:     } elsif ($target eq 'edit') {
1.25      matthew   879: 	$result .= &Apache::edit::tag_start($target,$token,'Plot Ylabel');
1.112     albertel  880: 	my $text = &Apache::lonxml::get_all_text("/ylabel",$parser,$style);
1.116     albertel  881: 	$result .= &Apache::edit::editline('',$text,'',60);
1.20      matthew   882:     } elsif ($target eq 'modified') {
1.42      matthew   883: 	$result.=&Apache::edit::rebuild_tag($token);
1.93      albertel  884: 	$result.=&Apache::edit::modifiedfield("/ylabel",$parser);
1.4       matthew   885:     }
1.1       matthew   886:     return $result;
                    887: }
                    888: 
                    889: sub end_ylabel {
                    890:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    891:     my $result = '';
1.51      matthew   892:     if ($target eq 'web' || $target eq 'tex') {
1.20      matthew   893:     } elsif ($target eq 'edit') {
1.27      matthew   894: 	$result.=&Apache::edit::tag_end($target,$token);
1.4       matthew   895:     }
1.1       matthew   896:     return $result;
                    897: }
1.21      matthew   898: 
1.1       matthew   899: ##------------------------------------------------------------------- label
                    900: sub start_label {
                    901:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    902:     my $result='';
1.51      matthew   903:     if ($target eq 'web' || $target eq 'tex') {
1.17      matthew   904: 	my %label;
                    905: 	&get_attributes(\%label,\%label_defaults,$parstack,$safeeval,
1.11      matthew   906: 		    $tagstack->[-1]);
1.112     albertel  907: 	my $text = &Apache::lonxml::get_all_text("/label",$parser,$style);
1.58      matthew   908: 	$text = &Apache::run::evaluate($text,$safeeval,$$parstack[-1]);
1.49      matthew   909: 	$text =~ s/\n/ /g;
1.32      matthew   910: 	$text = substr($text,0,$max_str_len) if (length($text) > $max_str_len);
1.128     albertel  911: 	$label{'text'} = &parse_label($target,$text);
1.17      matthew   912: 	push(@labels,\%label);
1.20      matthew   913:     } elsif ($target eq 'edit') {
1.25      matthew   914: 	$result .= &Apache::edit::tag_start($target,$token,'Plot Label');
1.21      matthew   915: 	$result .= &edit_attributes($target,$token,\%label_defaults);
1.112     albertel  916: 	my $text = &Apache::lonxml::get_all_text("/label",$parser,$style);
1.39      matthew   917: 	$result .= &Apache::edit::end_row().
                    918: 	    &Apache::edit::start_spanning_row().
1.63      albertel  919: 	    &Apache::edit::editline('',$text,'',60);
1.20      matthew   920:     } elsif ($target eq 'modified') {
1.42      matthew   921: 	&Apache::edit::get_new_args
1.24      matthew   922: 	    ($token,$parstack,$safeeval,keys(%label_defaults));
1.42      matthew   923: 	$result.=&Apache::edit::rebuild_tag($token);
1.93      albertel  924: 	$result.=&Apache::edit::modifiedfield("/label",$parser);
1.4       matthew   925:     }
1.1       matthew   926:     return $result;
                    927: }
                    928: 
                    929: sub end_label {
                    930:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    931:     my $result = '';
1.51      matthew   932:     if ($target eq 'web' || $target eq 'tex') {
1.20      matthew   933:     } elsif ($target eq 'edit') {
1.21      matthew   934: 	$result.=&Apache::edit::tag_end($target,$token);
1.4       matthew   935:     }
1.1       matthew   936:     return $result;
                    937: }
                    938: 
                    939: ##------------------------------------------------------------------- curve
                    940: sub start_curve {
                    941:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    942:     my $result='';
1.25      matthew   943:     &Apache::lonxml::register('Apache::lonplot',('function','data'));
                    944:     push (@Apache::lonxml::namespace,'curve');
1.51      matthew   945:     if ($target eq 'web' || $target eq 'tex') {
1.17      matthew   946: 	my %curve;
                    947: 	&get_attributes(\%curve,\%curve_defaults,$parstack,$safeeval,
1.11      matthew   948: 		    $tagstack->[-1]);
1.17      matthew   949: 	push (@curves,\%curve);
1.20      matthew   950:     } elsif ($target eq 'edit') {
1.26      matthew   951: 	$result .= &Apache::edit::tag_start($target,$token,'Curve');
1.60      matthew   952: 	$result .= &edit_attributes($target,$token,\%curve_defaults,
1.116     albertel  953:                                     \@curve_edit_order)
                    954: 	    .&Apache::edit::end_row()
                    955: 	    .&Apache::edit::start_spanning_row();
                    956: 
1.20      matthew   957:     } elsif ($target eq 'modified') {
                    958: 	my $constructtag=&Apache::edit::get_new_args
1.35      matthew   959: 	    ($token,$parstack,$safeeval,keys(%curve_defaults));
1.20      matthew   960: 	if ($constructtag) {
                    961: 	    $result = &Apache::edit::rebuild_tag($token);
                    962: 	}
1.4       matthew   963:     }
1.1       matthew   964:     return $result;
                    965: }
                    966: 
                    967: sub end_curve {
                    968:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    969:     my $result = '';
1.25      matthew   970:     pop @Apache::lonxml::namespace;
                    971:     &Apache::lonxml::deregister('Apache::lonplot',('function','data'));
1.51      matthew   972:     if ($target eq 'web' || $target eq 'tex') {
1.20      matthew   973:     } elsif ($target eq 'edit') {
1.21      matthew   974: 	$result.=&Apache::edit::tag_end($target,$token);
1.4       matthew   975:     }
1.1       matthew   976:     return $result;
                    977: }
1.21      matthew   978: 
1.1       matthew   979: ##------------------------------------------------------------ curve function
                    980: sub start_function {
                    981:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    982:     my $result='';
1.51      matthew   983:     if ($target eq 'web' || $target eq 'tex') {
1.17      matthew   984: 	if (exists($curves[-1]->{'data'})) {
1.85      matthew   985: 	    &Apache::lonxml::warning
                    986:                 ('Use of the <b>curve function</b> tag precludes use of '.
                    987:                  ' the <b>curve data</b> tag.  '.
                    988:                  'The curve data tag will be omitted in favor of the '.
                    989:                  'curve function declaration.');
1.17      matthew   990: 	    delete $curves[-1]->{'data'} ;
                    991: 	}
1.112     albertel  992:         my $function = &Apache::lonxml::get_all_text("/function",$parser,
                    993: 						     $style);
1.58      matthew   994: 	$function = &Apache::run::evaluate($function,$safeeval,$$parstack[-1]);
                    995: 	$curves[-1]->{'function'} = $function; 
1.20      matthew   996:     } elsif ($target eq 'edit') {
1.37      matthew   997: 	$result .= &Apache::edit::tag_start($target,$token,'Gnuplot compatible curve function');
1.112     albertel  998: 	my $text = &Apache::lonxml::get_all_text("/function",$parser,$style);
1.116     albertel  999: 	$result .= &Apache::edit::editline('',$text,'',60);
1.20      matthew  1000:     } elsif ($target eq 'modified') {
1.42      matthew  1001: 	$result.=&Apache::edit::rebuild_tag($token);
1.93      albertel 1002: 	$result.=&Apache::edit::modifiedfield("/function",$parser);
1.4       matthew  1003:     }
1.1       matthew  1004:     return $result;
                   1005: }
                   1006: 
                   1007: sub end_function {
                   1008:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1009:     my $result = '';
1.51      matthew  1010:     if ($target eq 'web' || $target eq 'tex') {
1.20      matthew  1011:     } elsif ($target eq 'edit') {
1.26      matthew  1012: 	$result .= &Apache::edit::end_table();
1.4       matthew  1013:     }
1.1       matthew  1014:     return $result;
                   1015: }
1.21      matthew  1016: 
1.1       matthew  1017: ##------------------------------------------------------------ curve  data
                   1018: sub start_data {
                   1019:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1020:     my $result='';
1.51      matthew  1021:     if ($target eq 'web' || $target eq 'tex') {
1.17      matthew  1022: 	if (exists($curves[-1]->{'function'})) {
1.85      matthew  1023: 	    &Apache::lonxml::warning
                   1024:                 ('Use of the <b>curve function</b> tag precludes use of '.
                   1025:                  ' the <b>curve data</b> tag.  '.
                   1026:                  'The curve function tag will be omitted in favor of the '.
                   1027:                  'curve data declaration.');
1.17      matthew  1028: 	    delete($curves[-1]->{'function'});
                   1029: 	}
1.112     albertel 1030: 	my $datatext = &Apache::lonxml::get_all_text("/data",$parser,$style);
1.58      matthew  1031: 	$datatext=&Apache::run::evaluate($datatext,$safeeval,$$parstack[-1]);
1.40      matthew  1032: 	# Deal with cases where we're given an array...
                   1033: 	if ($datatext =~ /^\@/) {
                   1034: 	    $datatext = &Apache::run::run('return "'.$datatext.'"',
                   1035: 					  $safeeval,1);
                   1036: 	}
1.49      matthew  1037: 	$datatext =~ s/\s+/ /g;
1.17      matthew  1038: 	# Need to do some error checking on the @data array - 
                   1039: 	# make sure it's all numbers and make sure each array 
                   1040: 	# is of the same length.
                   1041: 	my @data;
1.35      matthew  1042: 	if ($datatext =~ /,/) { # comma deliminated
1.17      matthew  1043: 	    @data = split /,/,$datatext;
1.95      www      1044: 	} else { # Assume it's space separated.
1.17      matthew  1045: 	    @data = split / /,$datatext;
                   1046: 	}
                   1047: 	for (my $i=0;$i<=$#data;$i++) {
                   1048: 	    # Check that it's non-empty
1.19      matthew  1049: 	    if (! defined($data[$i])) {
                   1050: 		&Apache::lonxml::warning(
1.85      matthew  1051: 		    'undefined curve data value.  Replacing with '.
1.19      matthew  1052: 		    ' pi/e = 1.15572734979092');
                   1053: 		$data[$i] = 1.15572734979092;
                   1054: 	    }
1.17      matthew  1055: 	    # Check that it's a number
1.19      matthew  1056: 	    if (! &$real_test($data[$i]) & ! &$int_test($data[$i])) {
                   1057: 		&Apache::lonxml::warning(
1.85      matthew  1058: 		    'Bad curve data value of '.$data[$i].'  Replacing with '.
1.19      matthew  1059: 		    ' pi/e = 1.15572734979092');
                   1060: 		$data[$i] = 1.15572734979092;
                   1061: 	    }
1.17      matthew  1062: 	}
1.35      matthew  1063: 	# complain if the number of data points is not the same as
                   1064: 	# in previous sets of data.
1.36      matthew  1065: 	if (($curves[-1]->{'data'}) && ($#data != $#{@{$curves[-1]->{'data'}->[0]}})){
1.35      matthew  1066: 	    &Apache::lonxml::warning
                   1067: 		('Number of data points is not consistent with previous '.
                   1068: 		 'number of data points');
                   1069: 	}
1.17      matthew  1070: 	push  @{$curves[-1]->{'data'}},\@data;
1.20      matthew  1071:     } elsif ($target eq 'edit') {
1.37      matthew  1072: 	$result .= &Apache::edit::tag_start($target,$token,'Comma or space deliminated curve data');
1.112     albertel 1073: 	my $text = &Apache::lonxml::get_all_text("/data",$parser,$style);
1.116     albertel 1074: 	$result .= &Apache::edit::editline('',$text,'',60);
1.20      matthew  1075:     } elsif ($target eq 'modified') {
1.42      matthew  1076: 	$result.=&Apache::edit::rebuild_tag($token);
1.93      albertel 1077: 	$result.=&Apache::edit::modifiedfield("/data",$parser);
1.4       matthew  1078:     }
1.1       matthew  1079:     return $result;
                   1080: }
                   1081: 
                   1082: sub end_data {
                   1083:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1084:     my $result = '';
1.51      matthew  1085:     if ($target eq 'web' || $target eq 'tex') {
1.20      matthew  1086:     } elsif ($target eq 'edit') {
1.26      matthew  1087: 	$result .= &Apache::edit::end_table();
1.4       matthew  1088:     }
1.1       matthew  1089:     return $result;
                   1090: }
                   1091: 
                   1092: ##------------------------------------------------------------------- axis
                   1093: sub start_axis {
                   1094:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1095:     my $result='';
1.51      matthew  1096:     if ($target eq 'web' || $target eq 'tex') {
1.17      matthew  1097: 	&get_attributes(\%axis,\%axis_defaults,$parstack,$safeeval,
                   1098: 			$tagstack->[-1]);
1.20      matthew  1099:     } elsif ($target eq 'edit') {
1.25      matthew  1100: 	$result .= &Apache::edit::tag_start($target,$token,'Plot Axes');
1.65      matthew  1101: 	$result .= &edit_attributes($target,$token,\%axis_defaults,
                   1102: 				    \@axis_edit_order);
1.20      matthew  1103:     } elsif ($target eq 'modified') {
1.29      matthew  1104: 	my $constructtag=&Apache::edit::get_new_args
                   1105: 	    ($token,$parstack,$safeeval,keys(%axis_defaults));
                   1106: 	if ($constructtag) {
                   1107: 	    $result = &Apache::edit::rebuild_tag($token);
                   1108: 	}
1.4       matthew  1109:     }
1.1       matthew  1110:     return $result;
                   1111: }
                   1112: 
                   1113: sub end_axis {
                   1114:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1115:     my $result = '';
1.51      matthew  1116:     if ($target eq 'web' || $target eq 'tex') {
1.20      matthew  1117:     } elsif ($target eq 'edit') {
1.21      matthew  1118: 	$result.=&Apache::edit::tag_end($target,$token);
1.20      matthew  1119:     } elsif ($target eq 'modified') {
1.4       matthew  1120:     }
1.1       matthew  1121:     return $result;
                   1122: }
                   1123: 
1.21      matthew  1124: ###################################################################
                   1125: ##                                                               ##
                   1126: ##        Utility Functions                                      ##
                   1127: ##                                                               ##
                   1128: ###################################################################
                   1129: 
1.13      matthew  1130: ##----------------------------------------------------------- set_defaults
                   1131: sub set_defaults {
1.21      matthew  1132:     my ($var,$defaults) = @_;
1.13      matthew  1133:     my $key;
1.24      matthew  1134:     foreach $key (keys(%$defaults)) {
1.13      matthew  1135: 	$var->{$key} = $defaults->{$key}->{'default'};
                   1136:     }
                   1137: }
                   1138: 
1.1       matthew  1139: ##------------------------------------------------------------------- misc
1.2       matthew  1140: sub get_attributes{
1.21      matthew  1141:     my ($values,$defaults,$parstack,$safeeval,$tag) = @_;
1.24      matthew  1142:     foreach my $attr (keys(%{$defaults})) {
1.92      matthew  1143: 	if ($attr eq 'texwidth' || $attr eq 'texfont') {
1.86      albertel 1144: 	    $values->{$attr} = 
                   1145: 		&Apache::lonxml::get_param($attr,$parstack,$safeeval,undef,1);
                   1146: 	} else {
                   1147: 	    $values->{$attr} = 
                   1148: 		&Apache::lonxml::get_param($attr,$parstack,$safeeval);
                   1149: 	}
1.10      matthew  1150: 	if ($values->{$attr} eq '' | !defined($values->{$attr})) {
1.11      matthew  1151: 	    $values->{$attr} = $defaults->{$attr}->{'default'};
1.6       matthew  1152: 	    next;
                   1153: 	}
1.10      matthew  1154: 	my $test = $defaults->{$attr}->{'test'};
                   1155: 	if (! &$test($values->{$attr})) {
1.6       matthew  1156: 	    &Apache::lonxml::warning
                   1157: 		($tag.':'.$attr.': Bad value.'.'Replacing your value with : '
1.11      matthew  1158: 		 .$defaults->{$attr}->{'default'} );
                   1159: 	    $values->{$attr} = $defaults->{$attr}->{'default'};
1.10      matthew  1160: 	}
1.2       matthew  1161:     }
1.11      matthew  1162:     return ;
1.6       matthew  1163: }
1.40      matthew  1164: 
1.15      matthew  1165: ##------------------------------------------------------- write_gnuplot_file
1.6       matthew  1166: sub write_gnuplot_file {
1.51      matthew  1167:     my ($tmpdir,$filename,$target)= @_;
1.124     albertel 1168:     my ($fontsize, $font_properties) =  &get_font($target);
1.6       matthew  1169:     my $gnuplot_input = '';
1.10      matthew  1170:     my $curve;
1.100     matthew  1171:     #
                   1172:     # Check to be sure we do not have any empty curves
                   1173:     my @curvescopy;
                   1174:     foreach my $curve (@curves) {
                   1175:         if (exists($curve->{'function'})) {
                   1176:             if ($curve->{'function'} !~ /^\s*$/) {
                   1177:                 push(@curvescopy,$curve);
                   1178:             }
                   1179:         } elsif (exists($curve->{'data'})) {
                   1180:             foreach my $data (@{$curve->{'data'}}) {
                   1181:                 if (scalar(@$data) > 0) {
                   1182:                     push(@curvescopy,$curve);
                   1183:                     last;
                   1184:                 }
                   1185:             }
                   1186:         }
                   1187:     }
                   1188:     @curves = @curvescopy;
1.6       matthew  1189:     # Collect all the colors
                   1190:     my @Colors;
1.107     foxr     1191:     push @Colors, $Apache::lonplot::plot{'bgcolor'};
                   1192:     push @Colors, $Apache::lonplot::plot{'fgcolor'}; 
                   1193:     push @Colors, (defined($axis{'color'})?$axis{'color'}:$Apache::lonplot::plot{'fgcolor'});
1.9       matthew  1194:     foreach $curve (@curves) {
                   1195: 	push @Colors, ($curve->{'color'} ne '' ? 
                   1196: 		       $curve->{'color'}       : 
1.107     foxr     1197: 		       $Apache::lonplot::plot{'fgcolor'}        );
1.6       matthew  1198:     }
                   1199:     # set term
1.51      matthew  1200:     if ($target eq 'web') {
1.120     albertel 1201: 	$gnuplot_input .= 'set terminal png enhanced nocrop ';
1.107     foxr     1202: 	$gnuplot_input .= 'transparent ' if ($Apache::lonplot::plot{'transparent'} eq 'on');
1.120     albertel 1203: 	$gnuplot_input .= 'font "'.$Apache::lonnet::perlvar{'lonFontsDir'}.
                   1204: 	    '/'.$font_properties->{'file'}.'.ttf" ';
                   1205: 	$gnuplot_input .= $fontsize;
                   1206: 	$gnuplot_input .= ' size '.$Apache::lonplot::plot{'width'}.','.$Apache::lonplot::plot{'height'}.' ';
1.51      matthew  1207: 	$gnuplot_input .= "@Colors\n";
                   1208: 	# set output
                   1209: 	$gnuplot_input .= "set output\n";
                   1210:     } elsif ($target eq 'tex') {
1.120     albertel 1211: 	$gnuplot_input .= "set term postscript eps enhanced $Apache::lonplot::plot{'plotcolor'} solid ";
1.121     albertel 1212: 	if (!$font_properties->{'tex_no_file'}) {
                   1213: 	    $gnuplot_input .=
                   1214: 		'fontfile "'.$Apache::lonnet::perlvar{'lonFontsDir'}.
                   1215: 		'/'.$font_properties->{'file'}.'.pfb" ';
                   1216: 	}
1.120     albertel 1217: 	$gnuplot_input .= ' "'.$font_properties->{'printname'}.'" ';
                   1218: 	$gnuplot_input .= $fontsize;
                   1219: 	$gnuplot_input .= "\nset output \"/home/httpd/perl/tmp/".
1.113     www      1220: 	    &unescape($filename).".eps\"\n";
1.87      matthew  1221:     }
1.115     albertel 1222:     # cartesian or polar plot?
1.107     foxr     1223:     if (lc($Apache::lonplot::plot{'plottype'}) eq 'polar') {
1.87      matthew  1224:         $gnuplot_input .= 'set polar'.$/;
                   1225:     } else {
                   1226:         # Assume Cartesian
1.51      matthew  1227:     }
1.115     albertel 1228:     # cartesian or polar grid?
                   1229:     if (lc($Apache::lonplot::plot{'gridtype'}) eq 'polar') {
                   1230:         $gnuplot_input .= 'set grid polar'.$/;
1.118     albertel 1231:     } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'linear-log') {
                   1232:         $gnuplot_input .= 'set logscale x'.$/;
                   1233:     } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'log-linear') {
                   1234:         $gnuplot_input .= 'set logscale y'.$/;
                   1235:     } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'log-log') {
                   1236:         $gnuplot_input .= 'set logscale x'.$/;
                   1237:         $gnuplot_input .= 'set logscale y'.$/;
1.115     albertel 1238:     } else {
                   1239:         # Assume Cartesian
                   1240:     }
1.110     albertel 1241:     # solid or pattern for boxes?
                   1242:     if (lc($Apache::lonplot::plot{'fillstyle'}) eq 'solid') {
                   1243:         $gnuplot_input .= 'set style fill solid '.
                   1244: 	    $Apache::lonplot::plot{'solid'}.$Apache::lonplot::plot{'box_border'}.$/;
                   1245:     } elsif (lc($Apache::lonplot::plot{'fillstyle'}) eq 'pattern') {
                   1246:         $gnuplot_input .= 'set style fill pattern '.$Apache::lonplot::plot{'pattern'}.$Apache::lonplot::plot{'box_border'}.$/;
                   1247:     } elsif (lc($Apache::lonplot::plot{'fillstyle'}) eq 'empty') {
                   1248:     }
1.101     matthew  1249:     # margin
1.107     foxr     1250:     if (lc($Apache::lonplot::plot{'lmargin'}) ne 'default') {
                   1251:         $gnuplot_input .= 'set lmargin '.$Apache::lonplot::plot{'lmargin'}.$/;
1.101     matthew  1252:     }
1.107     foxr     1253:     if (lc($Apache::lonplot::plot{'rmargin'}) ne 'default') {
                   1254:         $gnuplot_input .= 'set rmargin '.$Apache::lonplot::plot{'rmargin'}.$/;
1.101     matthew  1255:     }
1.107     foxr     1256:     if (lc($Apache::lonplot::plot{'tmargin'}) ne 'default') {
                   1257:         $gnuplot_input .= 'set tmargin '.$Apache::lonplot::plot{'tmargin'}.$/;
1.101     matthew  1258:     }
1.107     foxr     1259:     if (lc($Apache::lonplot::plot{'bmargin'}) ne 'default') {
                   1260:         $gnuplot_input .= 'set bmargin '.$Apache::lonplot::plot{'bmargin'}.$/;
1.101     matthew  1261:     }
1.129   ! albertel 1262: 
1.101     matthew  1263:     # tic scales
1.129   ! albertel 1264:     if ($version > 4) {
        !          1265: 	$gnuplot_input .= 'set tics scale '.
        !          1266: 	    $Apache::lonplot::plot{'major_ticscale'}.', '.$Apache::lonplot::plot{'minor_ticscale'}.$/;
        !          1267:     } else {
        !          1268:     	$gnuplot_input .= 'set ticscale '.
        !          1269: 	    $Apache::lonplot::plot{'major_ticscale'}.' '.$Apache::lonplot::plot{'minor_ticscale'}.$/;
        !          1270:     }
1.110     albertel 1271:     #boxwidth
                   1272:     if (lc($Apache::lonplot::plot{'boxwidth'}) ne '') {
                   1273: 	$gnuplot_input .= 'set boxwidth '.$Apache::lonplot::plot{'boxwidth'}.$/;
                   1274:     }
                   1275:     # gridlayer
                   1276:     $gnuplot_input .= 'set grid noxtics noytics front '.$/ 
                   1277: 	if ($Apache::lonplot::plot{'gridlayer'} eq 'on');
                   1278: 
1.7       matthew  1279:     # grid
1.107     foxr     1280:     $gnuplot_input .= 'set grid'.$/ if ($Apache::lonplot::plot{'grid'} eq 'on');
1.7       matthew  1281:     # border
1.107     foxr     1282:     $gnuplot_input .= ($Apache::lonplot::plot{'border'} eq 'on'?
1.9       matthew  1283: 		       'set border'.$/           :
1.67      matthew  1284: 		       'set noborder'.$/         );
1.77      matthew  1285:     # sampling rate for non-data curves
1.107     foxr     1286:     $gnuplot_input .= "set samples $Apache::lonplot::plot{'samples'}\n";
1.67      matthew  1287:     # title, xlabel, ylabel
1.45      matthew  1288:     # titles
1.125     albertel 1289:     my $extra_space_x = ($xtics{'location'} eq 'axis') ? ' 0, -0.5 ' : '';
                   1290:     my $extra_space_y = ($ytics{'location'} eq 'axis') ? ' -0.5, 0 ' : '';
                   1291: 
1.89      matthew  1292:     if ($target eq 'tex') {
1.125     albertel 1293: 	$gnuplot_input .= "set title  \"$title\"          font \"".$font_properties->{'printname'}.",".$fontsize."pt\"\n" if (defined($title)) ;
                   1294: 	$gnuplot_input .= "set xlabel \"$xlabel\" $extra_space_x font \"".$font_properties->{'printname'}.",".$fontsize."pt\"\n" if (defined($xlabel));
                   1295: 	$gnuplot_input .= "set ylabel \"$ylabel\" $extra_space_y font \"".$font_properties->{'printname'}.",".$fontsize."pt\"\n" if (defined($ylabel));
1.89      matthew  1296:     } else {
1.125     albertel 1297:         $gnuplot_input .= "set title  \"$title\"          \n" if (defined($title)) ;
                   1298:         $gnuplot_input .= "set xlabel \"$xlabel\" $extra_space_x \n" if (defined($xlabel));
                   1299:         $gnuplot_input .= "set ylabel \"$ylabel\" $extra_space_y \n" if (defined($ylabel));
1.89      matthew  1300:     }
1.45      matthew  1301:     # tics
                   1302:     if (%xtics) {    
                   1303: 	$gnuplot_input .= "set xtics $xtics{'location'} ";
1.46      matthew  1304: 	$gnuplot_input .= ( $xtics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1.45      matthew  1305: 	$gnuplot_input .= "$xtics{'start'}, ";
                   1306: 	$gnuplot_input .= "$xtics{'increment'}, ";
                   1307: 	$gnuplot_input .= "$xtics{'end'}\n";
1.89      matthew  1308:         if ($xtics{'minorfreq'} != 0) {
                   1309:             $gnuplot_input .= "set mxtics ".$xtics{'minorfreq'}."\n";
                   1310:         } 
1.45      matthew  1311:     }
                   1312:     if (%ytics) {    
                   1313: 	$gnuplot_input .= "set ytics $ytics{'location'} ";
1.46      matthew  1314: 	$gnuplot_input .= ( $ytics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1.45      matthew  1315: 	$gnuplot_input .= "$ytics{'start'}, ";
                   1316: 	$gnuplot_input .= "$ytics{'increment'}, ";
                   1317:         $gnuplot_input .= "$ytics{'end'}\n";
1.89      matthew  1318:         if ($ytics{'minorfreq'} != 0) {
                   1319:             $gnuplot_input .= "set mytics ".$ytics{'minorfreq'}."\n";
                   1320:         } 
1.45      matthew  1321:     }
                   1322:     # axis
1.23      matthew  1323:     if (%axis) {
1.13      matthew  1324: 	$gnuplot_input .= "set xrange \[$axis{'xmin'}:$axis{'xmax'}\]\n";
                   1325: 	$gnuplot_input .= "set yrange \[$axis{'ymin'}:$axis{'ymax'}\]\n";
1.6       matthew  1326:     }
                   1327:     # Key
1.23      matthew  1328:     if (%key) {
1.9       matthew  1329: 	$gnuplot_input .= 'set key '.$key{'pos'}.' ';
                   1330: 	if ($key{'title'} ne '') {
1.67      matthew  1331: 	    $gnuplot_input .= 'title "'.$key{'title'}.'" ';
1.11      matthew  1332: 	} 
                   1333: 	$gnuplot_input .= ($key{'box'} eq 'on' ? 'box ' : 'nobox ').$/;
1.6       matthew  1334:     } else {
1.9       matthew  1335: 	$gnuplot_input .= 'set nokey'.$/;
1.13      matthew  1336:     }
1.6       matthew  1337:     # labels
1.10      matthew  1338:     my $label;
1.6       matthew  1339:     foreach $label (@labels) {
                   1340: 	$gnuplot_input .= 'set label "'.$label->{'text'}.'" at '.
1.103     matthew  1341: 	    $label->{'xpos'}.','.$label->{'ypos'}.' '.$label->{'justify'};
                   1342:         if ($target eq 'tex') {
1.124     albertel 1343: 	    $gnuplot_input .=' font "'.$font_properties->{'printname'}.','.$fontsize.'pt"' ;
1.103     matthew  1344:         }
                   1345:         $gnuplot_input .= $/;
1.6       matthew  1346:     }
1.74      matthew  1347:     if ($target eq 'tex') {
1.107     foxr     1348:         $gnuplot_input .="set size 1,".$Apache::lonplot::plot{'height'}/$Apache::lonplot::plot{'width'}*1.38;
1.74      matthew  1349:         $gnuplot_input .="\n";
1.120     albertel 1350:     }
1.6       matthew  1351:     # curves
                   1352:     $gnuplot_input .= 'plot ';
1.9       matthew  1353:     for (my $i = 0;$i<=$#curves;$i++) {
                   1354: 	$curve = $curves[$i];
                   1355: 	$gnuplot_input.= ', ' if ($i > 0);
1.119     albertel 1356: 	if ($target eq 'tex') {
                   1357: 	    $curve->{'linewidth'} *= 2;
                   1358: 	}
1.6       matthew  1359: 	if (exists($curve->{'function'})) {
1.9       matthew  1360: 	    $gnuplot_input.= 
                   1361: 		$curve->{'function'}.' title "'.
                   1362: 		$curve->{'name'}.'" with '.
1.72      matthew  1363:                 $curve->{'linestyle'};
1.119     albertel 1364:             $gnuplot_input.= ' linewidth '.$curve->{'linewidth'};
                   1365: 
1.60      matthew  1366:             if (($curve->{'linestyle'} eq 'points')      ||
                   1367:                 ($curve->{'linestyle'} eq 'linespoints') ||
                   1368:                 ($curve->{'linestyle'} eq 'errorbars')   ||
                   1369:                 ($curve->{'linestyle'} eq 'xerrorbars')  ||
                   1370:                 ($curve->{'linestyle'} eq 'yerrorbars')  ||
                   1371:                 ($curve->{'linestyle'} eq 'xyerrorbars')) {
1.62      matthew  1372:                 $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
1.60      matthew  1373:                 $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1.110     albertel 1374:             } elsif ($curve->{'linestyle'} eq 'filledcurves') { 
                   1375:                 $gnuplot_input.= ' '.$curve->{'limit'};
1.60      matthew  1376:             }
1.6       matthew  1377: 	} elsif (exists($curve->{'data'})) {
1.40      matthew  1378: 	    # Store data values in $datatext
                   1379: 	    my $datatext = '';
                   1380: 	    #   get new filename
1.70      matthew  1381: 	    my $datafilename = "$tmpdir/$filename.data.$i";
1.40      matthew  1382: 	    my $fh=Apache::File->new(">$datafilename");
                   1383: 	    # Compile data
1.6       matthew  1384: 	    my @Data = @{$curve->{'data'}};
1.9       matthew  1385: 	    my @Data0 = @{$Data[0]};
                   1386: 	    for (my $i =0; $i<=$#Data0; $i++) {
1.10      matthew  1387: 		my $dataset;
1.6       matthew  1388: 		foreach $dataset (@Data) {
1.9       matthew  1389: 		    $datatext .= $dataset->[$i] . ' ';
1.6       matthew  1390: 		}
1.9       matthew  1391: 		$datatext .= $/;
1.6       matthew  1392: 	    }
1.40      matthew  1393: 	    #   write file
                   1394: 	    print $fh $datatext;
1.119     albertel 1395: 	    close($fh);
1.40      matthew  1396: 	    #   generate gnuplot text
                   1397: 	    $gnuplot_input.= '"'.$datafilename.'" title "'.
                   1398: 		$curve->{'name'}.'" with '.
                   1399: 		$curve->{'linestyle'};
1.119     albertel 1400:             $gnuplot_input.= ' linewidth '.$curve->{'linewidth'};
1.62      matthew  1401:             if (($curve->{'linestyle'} eq 'points')      ||
                   1402:                 ($curve->{'linestyle'} eq 'linespoints') ||
                   1403:                 ($curve->{'linestyle'} eq 'errorbars')   ||
                   1404:                 ($curve->{'linestyle'} eq 'xerrorbars')  ||
                   1405:                 ($curve->{'linestyle'} eq 'yerrorbars')  ||
                   1406:                 ($curve->{'linestyle'} eq 'xyerrorbars')) {
                   1407:                 $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
                   1408:                 $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1.110     albertel 1409:             } elsif ($curve->{'linestyle'} eq 'filledcurves') { 
                   1410:                 $gnuplot_input.= ' '.$curve->{'limit'};
1.62      matthew  1411:             }
1.6       matthew  1412: 	}
                   1413:     }
1.40      matthew  1414:     # Write the output to a file.
1.128     albertel 1415:     open (my $fh,">$tmpdir$filename.data");
                   1416:     binmode($fh, ":utf8");
1.40      matthew  1417:     print $fh $gnuplot_input;
                   1418:     close($fh);
                   1419:     # That's all folks.
                   1420:     return ;
1.2       matthew  1421: }
1.21      matthew  1422: 
                   1423: #---------------------------------------------- check_inputs
                   1424: sub check_inputs {
                   1425:     ## Note: no inputs, no outputs - this acts only on global variables.
                   1426:     ## Make sure we have all the input we need:
1.107     foxr     1427:     if (! %Apache::lonplot::plot) { &set_defaults(\%Apache::lonplot::plot,\%gnuplot_defaults); }
1.23      matthew  1428:     if (! %key ) {} # No key for this plot, thats okay
1.34      matthew  1429: #    if (! %axis) { &set_defaults(\%axis,\%axis_defaults); }
1.21      matthew  1430:     if (! defined($title )) {} # No title for this plot, thats okay
                   1431:     if (! defined($xlabel)) {} # No xlabel for this plot, thats okay
                   1432:     if (! defined($ylabel)) {} # No ylabel for this plot, thats okay
                   1433:     if ($#labels < 0) { }      # No labels for this plot, thats okay
                   1434:     if ($#curves < 0) { 
                   1435: 	&Apache::lonxml::warning("No curves specified for plot!!!!");
                   1436: 	return '';
                   1437:     }
                   1438:     my $curve;
                   1439:     foreach $curve (@curves) {
                   1440: 	if (!defined($curve->{'function'})&&!defined($curve->{'data'})){
1.85      matthew  1441: 	    &Apache::lonxml::warning("One of the curves specified did not contain any curve data or curve function declarations\n");
1.21      matthew  1442: 	    return '';
                   1443: 	}
                   1444:     }
                   1445: }
                   1446: 
1.20      matthew  1447: #------------------------------------------------ make_edit
                   1448: sub edit_attributes {
1.34      matthew  1449:     my ($target,$token,$defaults,$keys) = @_;
                   1450:     my ($result,@keys);
                   1451:     if ($keys && ref($keys) eq 'ARRAY') {
                   1452:         @keys = @$keys;
                   1453:     } else {
                   1454: 	@keys = sort(keys(%$defaults));
                   1455:     }
                   1456:     foreach my $attr (@keys) {
1.35      matthew  1457: 	# append a ' ' to the description if it doesn't have one already.
                   1458: 	my $description = $defaults->{$attr}->{'description'};
                   1459: 	$description .= ' ' if ($description !~ / $/);
1.20      matthew  1460: 	if ($defaults->{$attr}->{'edit_type'} eq 'entry') {
1.35      matthew  1461: 	    $result .= &Apache::edit::text_arg
1.38      matthew  1462: 		($description,$attr,$token,
                   1463: 		 $defaults->{$attr}->{'size'});
1.20      matthew  1464: 	} elsif ($defaults->{$attr}->{'edit_type'} eq 'choice') {
1.102     albertel 1465: 	    $result .= &Apache::edit::select_or_text_arg
1.35      matthew  1466: 		($description,$attr,$defaults->{$attr}->{'choices'},$token);
1.45      matthew  1467: 	} elsif ($defaults->{$attr}->{'edit_type'} eq 'onoff') {
1.102     albertel 1468: 	    $result .= &Apache::edit::select_or_text_arg
1.35      matthew  1469: 		($description,$attr,['on','off'],$token);
1.20      matthew  1470: 	}
1.25      matthew  1471: 	$result .= '<br />';
1.20      matthew  1472:     }
                   1473:     return $result;
                   1474: }
1.1       matthew  1475: 
1.21      matthew  1476: 
                   1477: ###################################################################
                   1478: ##                                                               ##
                   1479: ##           Insertion functions for editing plots               ##
                   1480: ##                                                               ##
                   1481: ###################################################################
                   1482: 
1.47      matthew  1483: sub insert_gnuplot {
1.29      matthew  1484:     my $result = '';
1.20      matthew  1485:     #  plot attributes
1.61      matthew  1486:     $result .= "\n<gnuplot ";
1.47      matthew  1487:     foreach my $attr (keys(%gnuplot_defaults)) {
1.61      matthew  1488: 	$result .= "\n     $attr=\"$gnuplot_defaults{$attr}->{'default'}\"";
1.20      matthew  1489:     }
1.61      matthew  1490:     $result .= ">";
1.47      matthew  1491:     # Add the components (most are commented out for simplicity)
1.44      matthew  1492:     # $result .= &insert_key();
                   1493:     # $result .= &insert_axis();
                   1494:     # $result .= &insert_title();    
                   1495:     # $result .= &insert_xlabel();    
                   1496:     # $result .= &insert_ylabel();    
1.20      matthew  1497:     $result .= &insert_curve();
1.50      matthew  1498:     # close up the <gnuplot>
1.61      matthew  1499:     $result .= "\n</gnuplot>";
1.45      matthew  1500:     return $result;
                   1501: }
                   1502: 
1.46      matthew  1503: sub insert_tics {
                   1504:     my $result;
                   1505:     $result .= &insert_xtics() . &insert_ytics;
                   1506:     return $result;
                   1507: }
                   1508: 
1.45      matthew  1509: sub insert_xtics {
                   1510:     my $result;
1.46      matthew  1511:     $result .= "\n    <xtics ";
1.45      matthew  1512:     foreach my $attr (keys(%tic_defaults)) {
1.61      matthew  1513: 	$result .= "\n        $attr=\"$tic_defaults{$attr}->{'default'}\" ";
1.45      matthew  1514:     }
1.61      matthew  1515:     $result .= "/>";
1.45      matthew  1516:     return $result;
                   1517: }
                   1518: 
                   1519: sub insert_ytics {
                   1520:     my $result;
1.46      matthew  1521:     $result .= "\n    <ytics ";
1.45      matthew  1522:     foreach my $attr (keys(%tic_defaults)) {
1.61      matthew  1523: 	$result .= "\n        $attr=\"$tic_defaults{$attr}->{'default'}\" ";
1.45      matthew  1524:     }
1.61      matthew  1525:     $result .= "/>";
1.20      matthew  1526:     return $result;
                   1527: }
                   1528: 
                   1529: sub insert_key {
                   1530:     my $result;
1.61      matthew  1531:     $result .= "\n    <key ";
1.30      matthew  1532:     foreach my $attr (keys(%key_defaults)) {
1.61      matthew  1533: 	$result .= "\n         $attr=\"$key_defaults{$attr}->{'default'}\"";
1.20      matthew  1534:     }
1.61      matthew  1535:     $result .= " />";
1.20      matthew  1536:     return $result;
                   1537: }
                   1538: 
                   1539: sub insert_axis{
                   1540:     my $result;
1.46      matthew  1541:     $result .= "\n    <axis ";
1.30      matthew  1542:    foreach my $attr (keys(%axis_defaults)) {
1.61      matthew  1543: 	$result .= "\n         $attr=\"$axis_defaults{$attr}->{'default'}\"";
1.20      matthew  1544:     }
1.61      matthew  1545:     $result .= " />";
1.20      matthew  1546:     return $result;
                   1547: }
1.28      matthew  1548: 
1.61      matthew  1549: sub insert_title  { return "\n    <title></title>"; }
                   1550: sub insert_xlabel { return "\n    <xlabel></xlabel>"; }
                   1551: sub insert_ylabel { return "\n    <ylabel></ylabel>"; }
1.20      matthew  1552: 
                   1553: sub insert_label {
                   1554:     my $result;
1.46      matthew  1555:     $result .= "\n    <label ";
1.30      matthew  1556:     foreach my $attr (keys(%label_defaults)) {
1.61      matthew  1557: 	$result .= "\n         $attr=\"".
                   1558:             $label_defaults{$attr}->{'default'}."\"";
1.20      matthew  1559:     }
1.61      matthew  1560:     $result .= "></label>";
1.20      matthew  1561:     return $result;
                   1562: }
                   1563: 
                   1564: sub insert_curve {
                   1565:     my $result;
1.41      matthew  1566:     $result .= "\n    <curve ";
1.30      matthew  1567:     foreach my $attr (keys(%curve_defaults)) {
1.61      matthew  1568: 	$result .= "\n         $attr=\"".
                   1569: 	    $curve_defaults{$attr}->{'default'}."\"";
1.20      matthew  1570:     }
1.61      matthew  1571:     $result .= " >";
                   1572:     $result .= &insert_data().&insert_data()."\n    </curve>";
1.20      matthew  1573: }
1.4       matthew  1574: 
1.20      matthew  1575: sub insert_function {
                   1576:     my $result;
1.61      matthew  1577:     $result .= "\n        <function></function>";
1.20      matthew  1578:     return $result;
                   1579: }
1.4       matthew  1580: 
1.20      matthew  1581: sub insert_data {
                   1582:     my $result;
1.61      matthew  1583:     $result .= "\n        <data></data>";
1.20      matthew  1584:     return $result;
                   1585: }
1.4       matthew  1586: 
1.48      matthew  1587: ##----------------------------------------------------------------------
1.20      matthew  1588: 1;
                   1589: __END__
1.4       matthew  1590: 
                   1591: 

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