Annotation of loncom/xml/lonplot.pm, revision 1.110

1.1       matthew     1: # The LearningOnline Network with CAPA
                      2: # Dynamic plot
                      3: #
1.110   ! albertel    4: # $Id: lonplot.pm,v 1.109 2005/06/07 22:30:42 foxr 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;
1.10      matthew    39: 
1.97      matthew    40: use vars qw/$weboutputformat $versionstring/;
                     41: 
1.109     foxr       42: 
1.108     foxr       43: 
1.33      harris41   44: BEGIN {
1.97      matthew    45:     &Apache::lonxml::register('Apache::lonplot',('gnuplot'));
                     46:     #
                     47:     # Determine the version of GNUPLOT
                     48:     $weboutputformat = 'gif';
1.99      matthew    49:     $versionstring = `gnuplot --version 2>/dev/null`;
1.97      matthew    50:     if ($versionstring =~ /^gnuplot 4/) {
                     51:         $weboutputformat = 'png';
                     52:     }
1.108     foxr       53:     
                     54: }
                     55: 
1.1       matthew    56: 
1.10      matthew    57: ## 
                     58: ## Description of data structures:
                     59: ##
                     60: ##  %plot       %key    %axis
                     61: ## --------------------------
                     62: ##  height      title   color
                     63: ##  width       box     xmin
                     64: ##  bgcolor     pos     xmax
                     65: ##  fgcolor             ymin
                     66: ##  transparent         ymax
                     67: ##  grid
                     68: ##  border
                     69: ##  font
1.19      matthew    70: ##  align
1.10      matthew    71: ##
                     72: ##  @labels: $labels[$i] = \%label
                     73: ##           %label: text, xpos, ypos, justify
1.14      matthew    74: ##
1.10      matthew    75: ##  @curves: $curves[$i] = \%curve
1.14      matthew    76: ##           %curve: name, linestyle, ( function | data )
1.10      matthew    77: ##
                     78: ##  $curves[$i]->{'data'} = [ [x1,x2,x3,x4],
                     79: ##                            [y1,y2,y3,y4] ]
                     80: ##
1.21      matthew    81: 
                     82: ###################################################################
                     83: ##                                                               ##
                     84: ##        Tests used in checking the validitity of input         ##
                     85: ##                                                               ##
                     86: ###################################################################
1.29      matthew    87: 
1.32      matthew    88: my $max_str_len = 50;    # if a label, title, xlabel, or ylabel text
                     89:                          # is longer than this, it will be truncated.
                     90: 
1.29      matthew    91: my %linestyles = 
                     92:     (
                     93:      lines          => 2,     # Maybe this will be used in the future
                     94:      linespoints    => 2,     # to check on whether or not they have 
                     95:      dots	    => 2,     # supplied enough <data></data> fields
                     96:      points         => 2,     # to use the given line style.  But for
                     97:      steps	    => 2,     # now there are more important things 
                     98:      fsteps	    => 2,     # for me to deal with.
                     99:      histeps        => 2,
1.34      matthew   100:      errorbars	    => 3,
                    101:      xerrorbars	    => [3,4],
                    102:      yerrorbars	    => [3,4],
1.35      matthew   103:      xyerrorbars    => [4,6],
1.34      matthew   104:      boxes          => 3,
1.110   ! albertel  105:      filledcurves   => 2,
1.35      matthew   106:      vector	    => 4
1.29      matthew   107:     );		    
                    108: 
1.11      matthew   109: my $int_test       = sub {$_[0]=~s/\s+//g;$_[0]=~/^\d+$/};
1.19      matthew   110: my $real_test      = 
                    111:     sub {$_[0]=~s/\s+//g;$_[0]=~/^[+-]?\d*\.?\d*([eE][+-]\d+)?$/};
1.62      matthew   112: my $pos_real_test  =
                    113:     sub {$_[0]=~s/\s+//g;$_[0]=~/^[+]?\d*\.?\d*([eE][+-]\d+)?$/};
1.79      matthew   114: my $color_test     = sub {$_[0]=~s/\s+//g;$_[0]=~/^x[\da-fA-F]{6}$/};
1.1       matthew   115: my $onoff_test     = sub {$_[0]=~/^(on|off)$/};
1.15      matthew   116: my $key_pos_test   = sub {$_[0]=~/^(top|bottom|right|left|outside|below| )+$/};
1.1       matthew   117: my $sml_test       = sub {$_[0]=~/^(small|medium|large)$/};
1.29      matthew   118: my $linestyle_test = sub {exists($linestyles{$_[0]})};
1.67      matthew   119: my $words_test     = sub {$_[0]=~s/\s+/ /g;$_[0]=~/^([\w~!\@\#\$\%^&\*\(\)-=_\+\[\]\{\}:\;\'<>,\.\/\?\\]+ ?)+$/};
1.21      matthew   120: 
                    121: ###################################################################
                    122: ##                                                               ##
                    123: ##                      Attribute metadata                       ##
                    124: ##                                                               ##
                    125: ###################################################################
1.47      matthew   126: my @gnuplot_edit_order = 
1.82      matthew   127:     qw/alttag bgcolor fgcolor height width font transparent grid samples 
1.105     matthew   128:     border align texwidth texfont plotcolor plottype lmargin rmargin tmargin
1.110   ! albertel  129:     bmargin major_ticscale minor_ticscale boxwidth gridlayer fillstyle
        !           130:     pattern solid/;
1.101     matthew   131: 
1.105     matthew   132: my $margin_choices = ['default',0..20];
1.48      matthew   133: 
1.47      matthew   134: my %gnuplot_defaults = 
1.1       matthew   135:     (
1.64      matthew   136:      alttag       => {
                    137: 	 default     => 'dynamically generated plot',
                    138: 	 test        => $words_test,
                    139: 	 description => 'brief description of the plot',
                    140:       	 edit_type   => 'entry',
                    141: 	 size        => '40'
                    142: 	 },
1.20      matthew   143:      height       => {
1.65      matthew   144: 	 default     => 300,
1.20      matthew   145: 	 test        => $int_test,
1.29      matthew   146: 	 description => 'height of image (pixels)',
1.38      matthew   147:       	 edit_type   => 'entry',
                    148: 	 size        => '10'
1.20      matthew   149: 	 },
                    150:      width        => {
1.65      matthew   151: 	 default     => 400,
1.20      matthew   152: 	 test        => $int_test,
1.29      matthew   153: 	 description => 'width of image (pixels)',
1.38      matthew   154: 	 edit_type   => 'entry',
                    155: 	 size        => '10'
1.20      matthew   156: 	 },
                    157:      bgcolor      => {
                    158: 	 default     => 'xffffff',
                    159: 	 test        => $color_test, 
                    160: 	 description => 'background color of image (xffffff)',
1.38      matthew   161: 	 edit_type   => 'entry',
                    162: 	 size        => '10'
1.20      matthew   163: 	 },
                    164:      fgcolor      => {
                    165: 	 default     => 'x000000',
                    166: 	 test        => $color_test,
                    167: 	 description => 'foreground color of image (x000000)',
1.38      matthew   168: 	 edit_type   => 'entry',
                    169: 	 size        => '10'
1.20      matthew   170: 	 },
                    171:      transparent  => {
                    172: 	 default     => 'off',
                    173: 	 test        => $onoff_test, 
1.34      matthew   174: 	 description => 'Transparent image',
1.45      matthew   175: 	 edit_type   => 'onoff'
1.20      matthew   176: 	 },
                    177:      grid         => {
1.65      matthew   178: 	 default     => 'on',
1.20      matthew   179: 	 test        => $onoff_test, 
1.34      matthew   180: 	 description => 'Display grid',
1.45      matthew   181: 	 edit_type   => 'onoff'
1.20      matthew   182: 	 },
1.110   ! albertel  183:      gridlayer    => {
        !           184: 	 default     => 'off',
        !           185: 	 test        => $onoff_test, 
        !           186: 	 description => 'Display grid front layer over filled boxes or filled curves',
        !           187: 	 edit_type   => 'onoff'
        !           188: 	 },
        !           189:      box_border   => {
        !           190: 	 default     => 'noborder',
        !           191: 	 test        => sub {$_[0]=~/^(noborder|border)$/},
        !           192: 	 description => 'Draw border for boxes',
        !           193: 	 edit_type   => 'choice',
        !           194: 	 choices     => ['border','noborder']
        !           195: 	 },
1.20      matthew   196:      border       => {
                    197: 	 default     => 'on',
                    198: 	 test        => $onoff_test, 
1.34      matthew   199: 	 description => 'Draw border around plot',
1.45      matthew   200: 	 edit_type   => 'onoff'
1.20      matthew   201: 	 },
                    202:      font         => {
                    203: 	 default     => 'medium',
                    204: 	 test        => $sml_test,
                    205: 	 description => 'Size of font to use',
                    206: 	 edit_type   => 'choice',
                    207: 	 choices     => ['small','medium','large']
                    208: 	 },
1.110   ! albertel  209:      samples      => {
1.77      matthew   210: 	 default     => '100',
                    211: 	 test        => $int_test,
                    212: 	 description => 'Number of samples for non-data plots',
                    213: 	 edit_type   => 'choice',
                    214: 	 choices     => ['100','200','500','1000','2000','5000']
                    215: 	 },
1.20      matthew   216:      align        => {
1.65      matthew   217: 	 default     => 'center',
1.20      matthew   218: 	 test        => sub {$_[0]=~/^(left|right|center)$/},
                    219: 	 description => 'alignment for image in html',
                    220: 	 edit_type   => 'choice',
                    221: 	 choices     => ['left','right','center']
1.82      matthew   222: 	 },
                    223:      texwidth     => {
                    224:          default     => '93',
                    225:          test        => $int_test,
                    226:          description => 'Width of plot when printed (mm)',
                    227:          edit_type   => 'entry',
                    228:          size        => '5'
                    229:          },
1.110   ! albertel  230:      texfont      => {
1.92      matthew   231:          default     => '22',
                    232:          test        => $int_test,
                    233:          description => 'Font size to use in TeX output (pts):',
                    234:          edit_type   => 'choice',
1.96      matthew   235:          choices     => [qw/8 10 12 14 16 18 20 22 24 26 28 30 32 34 36/],
1.92      matthew   236:          },
1.110   ! albertel  237:      plotcolor    => {
1.105     matthew   238:          default     => 'monochrome',
                    239:          test        => sub {$_[0]=~/^(monochrome|color|colour)$/},
                    240:          description => 'Color setting for printing:',
                    241:          edit_type   => 'choice',
                    242:          choices     => [qw/monochrome color colour/],
                    243:          },
1.110   ! albertel  244:      pattern      => {
        !           245: 	 default     => '',
        !           246: 	 test        => $int_test,
        !           247: 	 description => 'pattern value for boxes:',
        !           248: 	 edit_type   => 'choice',
        !           249:          choices     => [0,1,2,3,4,5,6]
        !           250:          },
        !           251:      solid        => {
        !           252:          default     => 0,
        !           253:          test        => $real_test,
        !           254:          description => 'The density of fill style for boxes',
        !           255:          edit_type   => 'entry',
        !           256:          size        => '5'
        !           257:          },
        !           258:      fillstyle    => {
        !           259: 	 default     => 'empty',
        !           260: 	 test        => sub {$_[0]=~/^(empty|solid|pattern)$/},
        !           261: 	 description => 'Filled style for boxes:',
        !           262: 	 edit_type   => 'choice',
        !           263:          choices     => ['empty','solid','pattern']
        !           264:          },
        !           265:      plottype     => {
1.87      matthew   266: 	 default     => 'Cartesian',
                    267: 	 test        => sub {$_[0]=~/^(Polar|Cartesian)$/},
                    268: 	 description => 'Plot type:',
                    269: 	 edit_type   => 'choice',
1.94      matthew   270:          choices     => ['Cartesian','Polar']
1.87      matthew   271:          },
1.110   ! albertel  272:      lmargin      => {
1.101     matthew   273: 	 default     => 'default',
                    274: 	 test        => sub {$_[0]=~/^(default|\d+)$/},
                    275: 	 description => 'Left margin width (pts):',
                    276: 	 edit_type   => 'choice',
                    277:          choices     => $margin_choices,
                    278:          },
1.110   ! albertel  279:      rmargin      => {
1.101     matthew   280: 	 default     => 'default',
                    281: 	 test        => sub {$_[0]=~/^(default|\d+)$/},
                    282: 	 description => 'Right margin width (pts):',
                    283: 	 edit_type   => 'choice',
                    284:          choices     => $margin_choices,
                    285:          },
1.110   ! albertel  286:      tmargin      => {
1.101     matthew   287: 	 default     => 'default',
                    288: 	 test        => sub {$_[0]=~/^(default|\d+)$/},
                    289: 	 description => 'Top margin width (pts):',
                    290: 	 edit_type   => 'choice',
                    291:          choices     => $margin_choices,
                    292:          },
1.110   ! albertel  293:      bmargin      => {
1.101     matthew   294: 	 default     => 'default',
                    295: 	 test        => sub {$_[0]=~/^(default|\d+)$/},
1.104     www       296: 	 description => 'Bottom margin width (pts):',
1.101     matthew   297: 	 edit_type   => 'choice',
                    298:          choices     => $margin_choices,
                    299:          },
1.110   ! albertel  300:      boxwidth     => {
        !           301: 	 default     => '',
        !           302: 	 test        => $real_test, 
        !           303: 	 description => 'width of boxes default auto',
        !           304: 	 edit_type   => 'entry',
        !           305:          size        => '5'
        !           306:          },
1.101     matthew   307:      major_ticscale  => {
                    308:          default     => '1',
                    309:          test        => $real_test,
                    310:          description => 'Size of major tic marks (plot coordinates)',
                    311:          edit_type   => 'entry',
                    312:          size        => '5'
                    313:          },
                    314:      minor_ticscale  => {
                    315:          default     => '0.5',
                    316:          test        => $real_test,
                    317:          description => 'Size of minor tic mark (plot coordinates)',
                    318:          edit_type   => 'entry',
                    319:          size        => '5'
                    320:          },
1.1       matthew   321:      );
                    322: 
                    323: my %key_defaults = 
                    324:     (
1.20      matthew   325:      title => { 
                    326: 	 default => '',
                    327: 	 test => $words_test,
                    328: 	 description => 'Title of key',
1.38      matthew   329: 	 edit_type   => 'entry',
                    330: 	 size        => '40'
1.20      matthew   331: 	 },
                    332:      box   => { 
                    333: 	 default => 'off',
                    334: 	 test => $onoff_test,
                    335: 	 description => 'Draw a box around the key?',
1.45      matthew   336: 	 edit_type   => 'onoff'
1.20      matthew   337: 	 },
                    338:      pos   => { 
                    339: 	 default => 'top right', 
                    340: 	 test => $key_pos_test, 
                    341: 	 description => 'position of the key on the plot',
                    342: 	 edit_type   => 'choice',
                    343: 	 choices     => ['top left','top right','bottom left','bottom right',
                    344: 			 'outside','below']
                    345: 	 }
1.1       matthew   346:      );
                    347: 
                    348: my %label_defaults = 
                    349:     (
1.20      matthew   350:      xpos    => {
                    351: 	 default => 0,
                    352: 	 test => $real_test,
                    353: 	 description => 'x position of label (graph coordinates)',
1.38      matthew   354: 	 edit_type   => 'entry',
                    355: 	 size        => '10'
1.20      matthew   356: 	 },
                    357:      ypos    => {
                    358: 	 default => 0, 
                    359: 	 test => $real_test,
                    360: 	 description => 'y position of label (graph coordinates)',
1.38      matthew   361: 	 edit_type   => 'entry',
                    362: 	 size        => '10'
1.20      matthew   363: 	 },
                    364:      justify => {
                    365: 	 default => 'left',    
                    366: 	 test => sub {$_[0]=~/^(left|right|center)$/},
                    367: 	 description => 'justification of the label text on the plot',
                    368: 	 edit_type   => 'choice',
                    369: 	 choices     => ['left','right','center']
                    370:      }
1.1       matthew   371:      );
                    372: 
1.89      matthew   373: my @tic_edit_order = ('location','mirror','start','increment','end',
                    374:                       'minorfreq');
1.45      matthew   375: my %tic_defaults =
                    376:     (
                    377:      location => {
                    378: 	 default => 'border', 
                    379: 	 test => sub {$_[0]=~/^(border|axis)$/},
1.90      matthew   380: 	 description => 'Location of major tic marks',
1.45      matthew   381: 	 edit_type   => 'choice',
                    382: 	 choices     => ['border','axis']
                    383: 	 },
                    384:      mirror => {
                    385: 	 default => 'on', 
                    386: 	 test => $onoff_test,
1.90      matthew   387: 	 description => 'mirror tics on opposite axis?',
1.45      matthew   388: 	 edit_type   => 'onoff'
                    389: 	 },
                    390:      start => {
                    391: 	 default => '-10.0',
                    392: 	 test => $real_test,
1.90      matthew   393: 	 description => 'Start major tics at',
1.45      matthew   394: 	 edit_type   => 'entry',
                    395: 	 size        => '10'
                    396: 	 },
                    397:      increment => {
                    398: 	 default => '1.0',
                    399: 	 test => $real_test,
1.90      matthew   400: 	 description => 'Place a major tic every',
1.45      matthew   401: 	 edit_type   => 'entry',
                    402: 	 size        => '10'
                    403: 	 },
                    404:      end => {
                    405: 	 default => ' 10.0',
                    406: 	 test => $real_test,
1.90      matthew   407: 	 description => 'Stop major tics at ',
1.45      matthew   408: 	 edit_type   => 'entry',
                    409: 	 size        => '10'
                    410: 	 },
1.89      matthew   411:      minorfreq => {
                    412: 	 default => '0',
                    413: 	 test => $int_test,
1.98      matthew   414: 	 description => 'Number of minor tics per major tic mark',
1.89      matthew   415: 	 edit_type   => 'entry',
                    416: 	 size        => '10'
                    417: 	 },         
1.45      matthew   418:      );
                    419: 
1.65      matthew   420: my @axis_edit_order = ('color','xmin','xmax','ymin','ymax');
1.1       matthew   421: my %axis_defaults = 
                    422:     (
1.28      matthew   423:      color   => {
1.20      matthew   424: 	 default => 'x000000', 
                    425: 	 test => $color_test,
1.78      matthew   426: 	 description => 'color of grid lines (x000000)',
1.38      matthew   427: 	 edit_type   => 'entry',
                    428: 	 size        => '10'
1.20      matthew   429: 	 },
                    430:      xmin      => {
                    431: 	 default => '-10.0',
                    432: 	 test => $real_test,
                    433: 	 description => 'minimum x-value shown in plot',
1.38      matthew   434: 	 edit_type   => 'entry',
                    435: 	 size        => '10'
1.20      matthew   436: 	 },
                    437:      xmax      => {
                    438: 	 default => ' 10.0',
                    439: 	 test => $real_test,
                    440: 	 description => 'maximum x-value shown in plot',	 
1.38      matthew   441: 	 edit_type   => 'entry',
                    442: 	 size        => '10'
1.20      matthew   443: 	 },
                    444:      ymin      => {
                    445: 	 default => '-10.0',
                    446: 	 test => $real_test,
                    447: 	 description => 'minimum y-value shown in plot',	 
1.38      matthew   448: 	 edit_type   => 'entry',
                    449: 	 size        => '10'
1.20      matthew   450: 	 },
                    451:      ymax      => {
                    452: 	 default => ' 10.0',
                    453: 	 test => $real_test,
                    454: 	 description => 'maximum y-value shown in plot',	 
1.38      matthew   455: 	 edit_type   => 'entry',
                    456: 	 size        => '10'
1.20      matthew   457: 	 }
1.1       matthew   458:      );
                    459: 
1.110   ! albertel  460: my @curve_edit_order = ('color','name','linestyle','pointtype','pointsize','limit');
1.60      matthew   461: 
1.1       matthew   462: my %curve_defaults = 
                    463:     (
1.20      matthew   464:      color     => {
                    465: 	 default => 'x000000',
                    466: 	 test => $color_test,
                    467: 	 description => 'color of curve (x000000)',
1.38      matthew   468: 	 edit_type   => 'entry',
                    469: 	 size        => '10'
1.20      matthew   470: 	 },
                    471:      name      => {
                    472: 	 default => '',
                    473: 	 test => $words_test,
                    474: 	 description => 'name of curve to appear in key',
1.38      matthew   475: 	 edit_type   => 'entry',
                    476: 	 size        => '20'
1.20      matthew   477: 	 },
                    478:      linestyle => {
                    479: 	 default => 'lines',
                    480: 	 test => $linestyle_test,
1.35      matthew   481: 	 description => 'Line style',
1.20      matthew   482: 	 edit_type   => 'choice',
1.38      matthew   483: 	 choices     => [keys(%linestyles)]
1.60      matthew   484: 	 },
                    485: # gnuplots term=gif driver does not handle linewidth :(
                    486: #     linewidth => {
                    487: #         default     => 1,
                    488: #         test        => $int_test,
                    489: #         description => 'Line width (may not apply to all line styles)',
                    490: #         edit_type   => 'choice',
                    491: #         choices     => [1,2,3,4,5,6,7,8,9,10]
                    492: #         },
                    493:      pointsize => {
                    494:          default     => 1,
1.62      matthew   495:          test        => $pos_real_test,
                    496:          description => 'point size (may not apply to all line styles)',
                    497:          edit_type   => 'entry',
                    498:          size        => '5'
                    499:          },
                    500:      pointtype => {
                    501:          default     => 1,
1.60      matthew   502:          test        => $int_test,
1.62      matthew   503:          description => 'point type (may not apply to all line styles)',
1.60      matthew   504:          edit_type   => 'choice',
1.62      matthew   505:          choices     => [0,1,2,3,4,5,6]
1.110   ! albertel  506:          },
        !           507:      limit     => {
        !           508:          default     => 'closed',
        !           509: 	 test        => sub {$_[0]=~/^(closed|x1|x2|y1|y2)$/},
        !           510:          description => 'point to fill -- for filledcurves',
        !           511:          edit_type   => 'choice',
        !           512:          choices     => ['closed','x1','x2','y1','y2']
        !           513:          },
1.1       matthew   514:      );
                    515: 
1.21      matthew   516: ###################################################################
                    517: ##                                                               ##
                    518: ##                    parsing and edit rendering                 ##
                    519: ##                                                               ##
                    520: ###################################################################
1.107     foxr      521: 
                    522: undef %Apache::lonplot::plot;
                    523: my (%key,%axis,$title,$xlabel,$ylabel,@labels,@curves,%xtics,%ytics);
1.1       matthew   524: 
1.47      matthew   525: sub start_gnuplot {
1.107     foxr      526:     undef(%Apache::lonplot::plot);   undef(%key);    undef(%axis);
1.89      matthew   527:     undef($title);  undef($xlabel); undef($ylabel);
                    528:     undef(@labels); undef(@curves);
                    529:     undef(%xtics);  undef(%ytics);
1.6       matthew   530:     #
1.1       matthew   531:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    532:     my $result='';
1.25      matthew   533:     &Apache::lonxml::register('Apache::lonplot',
1.45      matthew   534: 	     ('title','xlabel','ylabel','key','axis','label','curve',
                    535: 	      'xtics','ytics'));
1.29      matthew   536:     push (@Apache::lonxml::namespace,'lonplot');
1.51      matthew   537:     if ($target eq 'web' || $target eq 'tex') {
1.107     foxr      538: 	&get_attributes(\%Apache::lonplot::plot,\%gnuplot_defaults,$parstack,$safeeval,
1.17      matthew   539: 			$tagstack->[-1]);
1.20      matthew   540:     } elsif ($target eq 'edit') {
1.47      matthew   541: 	$result .= &Apache::edit::tag_start($target,$token,'GnuPlot');
                    542: 	$result .= &edit_attributes($target,$token,\%gnuplot_defaults,
                    543: 				    \@gnuplot_edit_order);
1.20      matthew   544:     } elsif ($target eq 'modified') {
                    545: 	my $constructtag=&Apache::edit::get_new_args
1.47      matthew   546: 	    ($token,$parstack,$safeeval,keys(%gnuplot_defaults));
1.20      matthew   547: 	if ($constructtag) {
                    548: 	    $result = &Apache::edit::rebuild_tag($token);
                    549: 	}
1.4       matthew   550:     }
1.21      matthew   551:     return $result;
1.1       matthew   552: }
                    553: 
1.47      matthew   554: sub end_gnuplot {
1.1       matthew   555:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    556:     pop @Apache::lonxml::namespace;
1.4       matthew   557:     &Apache::lonxml::deregister('Apache::lonplot',
                    558: 	('title','xlabel','ylabel','key','axis','label','curve'));
                    559:     my $result = '';
1.56      albertel  560:     my $randnumber;
                    561:     # need to call rand everytime start_script would evaluate, as the
                    562:     # safe space rand number generator and the global rand generator 
1.95      www       563:     # are not separate
1.56      albertel  564:     if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
                    565: 	$target eq 'answer') {
                    566:       $randnumber=int(rand(1000));
                    567:     }
1.51      matthew   568:     if ($target eq 'web' || $target eq 'tex') {
1.21      matthew   569: 	&check_inputs(); # Make sure we have all the data we need
1.13      matthew   570: 	##
                    571: 	## Determine filename
1.4       matthew   572: 	my $tmpdir = '/home/httpd/perl/tmp/';
1.106     albertel  573: 	my $filename = $env{'user.name'}.'_'.$env{'user.domain'}.
1.69      matthew   574: 	    '_'.time.'_'.$$.$randnumber.'_plot';
1.4       matthew   575: 	## Write the plot description to the file
1.51      matthew   576: 	&write_gnuplot_file($tmpdir,$filename,$target);
1.54      matthew   577: 	$filename = &Apache::lonnet::escape($filename);
1.4       matthew   578: 	## return image tag for the plot
1.51      matthew   579: 	if ($target eq 'web') {
                    580: 	    $result .= <<"ENDIMAGE";
1.97      matthew   581: <img src    = "/cgi-bin/plot.gif?file=$filename.data&output=$weboutputformat" 
1.107     foxr      582:      width  = "$Apache::lonplot::plot{'width'}"
                    583:      height = "$Apache::lonplot::plot{'height'}"
                    584:      align  = "$Apache::lonplot::plot{'align'}"
                    585:      alt    = "$Apache::lonplot::plot{'alttag'}" />
1.12      matthew   586: ENDIMAGE
1.51      matthew   587:         } elsif ($target eq 'tex') {
1.107     foxr      588: 	    &Apache::lonxml::debug(" gnuplot wid = $Apache::lonplot::plot{'width'}");
                    589: 	    &Apache::lonxml::debug(" gnuplot ht  = $Apache::lonplot::plot{'height'}");
1.91      albertel  590: 	    #might be inside the safe space, register the URL for later
                    591: 	    &Apache::lonxml::register_ssi("/cgi-bin/plot.gif?file=$filename.data&output=eps");
1.109     foxr      592: 	    $result  = "%DYNAMICIMAGE:$Apache::lonplot::plot{'width'}:$Apache::lonplot::plot{'height'}:$Apache::lonplot::plot{'texwidth'} \n";
                    593: 	    $result .= '\graphicspath{{/home/httpd/perl/tmp/}}'."\n";
                    594: 	    $result .= '\includegraphics[width='.$Apache::lonplot::plot{'texwidth'}.' mm]{'.&Apache::lonnet::unescape($filename).'.eps}';
1.51      matthew   595: 	}
1.20      matthew   596:     } elsif ($target eq 'edit') {
1.21      matthew   597: 	$result.=&Apache::edit::tag_end($target,$token);
1.4       matthew   598:     }
1.1       matthew   599:     return $result;
                    600: }
1.2       matthew   601: 
1.45      matthew   602: 
                    603: ##--------------------------------------------------------------- xtics
                    604: sub start_xtics {
                    605:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    606:     my $result='';
1.51      matthew   607:     if ($target eq 'web' || $target eq 'tex') {
1.45      matthew   608: 	&get_attributes(\%xtics,\%tic_defaults,$parstack,$safeeval,
                    609: 		    $tagstack->[-1]);
                    610:     } elsif ($target eq 'edit') {
                    611: 	$result .= &Apache::edit::tag_start($target,$token,'xtics');
                    612: 	$result .= &edit_attributes($target,$token,\%tic_defaults,
                    613: 				    \@tic_edit_order);
                    614:     } elsif ($target eq 'modified') {
                    615: 	my $constructtag=&Apache::edit::get_new_args
                    616: 	    ($token,$parstack,$safeeval,keys(%tic_defaults));
                    617: 	if ($constructtag) {
                    618: 	    $result = &Apache::edit::rebuild_tag($token);
                    619: 	}
                    620:     }
                    621:     return $result;
                    622: }
                    623: 
                    624: sub end_xtics {
                    625:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    626:     my $result = '';
1.51      matthew   627:     if ($target eq 'web' || $target eq 'tex') {
1.45      matthew   628:     } elsif ($target eq 'edit') {
                    629: 	$result.=&Apache::edit::tag_end($target,$token);
                    630:     }
                    631:     return $result;
                    632: }
                    633: 
                    634: ##--------------------------------------------------------------- ytics
                    635: sub start_ytics {
                    636:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    637:     my $result='';
1.51      matthew   638:     if ($target eq 'web' || $target eq 'tex') {
1.45      matthew   639: 	&get_attributes(\%ytics,\%tic_defaults,$parstack,$safeeval,
                    640: 		    $tagstack->[-1]);
                    641:     } elsif ($target eq 'edit') {
                    642: 	$result .= &Apache::edit::tag_start($target,$token,'ytics');
                    643: 	$result .= &edit_attributes($target,$token,\%tic_defaults,
                    644: 				    \@tic_edit_order);
                    645:     } elsif ($target eq 'modified') {
                    646: 	my $constructtag=&Apache::edit::get_new_args
                    647: 	    ($token,$parstack,$safeeval,keys(%tic_defaults));
                    648: 	if ($constructtag) {
                    649: 	    $result = &Apache::edit::rebuild_tag($token);
                    650: 	}
                    651:     }
                    652:     return $result;
                    653: }
                    654: 
                    655: sub end_ytics {
                    656:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    657:     my $result = '';
1.51      matthew   658:     if ($target eq 'web' || $target eq 'tex') {
1.45      matthew   659:     } elsif ($target eq 'edit') {
                    660: 	$result.=&Apache::edit::tag_end($target,$token);
                    661:     }
                    662:     return $result;
                    663: }
                    664: 
                    665: 
1.1       matthew   666: ##----------------------------------------------------------------- key
                    667: sub start_key {
                    668:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    669:     my $result='';
1.51      matthew   670:     if ($target eq 'web' || $target eq 'tex') {
1.17      matthew   671: 	&get_attributes(\%key,\%key_defaults,$parstack,$safeeval,
1.11      matthew   672: 		    $tagstack->[-1]);
1.20      matthew   673:     } elsif ($target eq 'edit') {
1.25      matthew   674: 	$result .= &Apache::edit::tag_start($target,$token,'Plot Key');
1.21      matthew   675: 	$result .= &edit_attributes($target,$token,\%key_defaults);
1.20      matthew   676:     } elsif ($target eq 'modified') {
                    677: 	my $constructtag=&Apache::edit::get_new_args
1.24      matthew   678: 	    ($token,$parstack,$safeeval,keys(%key_defaults));
1.20      matthew   679: 	if ($constructtag) {
                    680: 	    $result = &Apache::edit::rebuild_tag($token);
                    681: 	}
1.4       matthew   682:     }
1.1       matthew   683:     return $result;
                    684: }
                    685: 
                    686: sub end_key {
                    687:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    688:     my $result = '';
1.51      matthew   689:     if ($target eq 'web' || $target eq 'tex') {
1.20      matthew   690:     } elsif ($target eq 'edit') {
1.21      matthew   691: 	$result.=&Apache::edit::tag_end($target,$token);
1.4       matthew   692:     }
1.1       matthew   693:     return $result;
                    694: }
1.21      matthew   695: 
1.1       matthew   696: ##------------------------------------------------------------------- title
                    697: sub start_title {
                    698:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    699:     my $result='';
1.51      matthew   700:     if ($target eq 'web' || $target eq 'tex') {
1.81      albertel  701: 	$title = &Apache::lonxml::get_all_text("/title",$parser);
1.58      matthew   702: 	$title=&Apache::run::evaluate($title,$safeeval,$$parstack[-1]);
1.49      matthew   703: 	$title =~ s/\n/ /g;
1.32      matthew   704: 	if (length($title) > $max_str_len) {
                    705: 	    $title = substr($title,0,$max_str_len);
                    706: 	}
1.20      matthew   707:     } elsif ($target eq 'edit') {
1.25      matthew   708: 	$result.=&Apache::edit::tag_start($target,$token,'Plot Title');
1.81      albertel  709: 	my $text=&Apache::lonxml::get_all_text("/title",$parser);
1.39      matthew   710: 	$result.=&Apache::edit::end_row().
                    711: 	    &Apache::edit::start_spanning_row().
1.63      albertel  712: 	    &Apache::edit::editline('',$text,'',60);
1.20      matthew   713:     } elsif ($target eq 'modified') {
1.42      matthew   714: 	$result.=&Apache::edit::rebuild_tag($token);
1.93      albertel  715: 	$result.=&Apache::edit::modifiedfield("/title",$parser);
1.4       matthew   716:     }
1.1       matthew   717:     return $result;
                    718: }
                    719: 
                    720: sub end_title {
                    721:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    722:     my $result = '';
1.51      matthew   723:     if ($target eq 'web' || $target eq 'tex') {
1.20      matthew   724:     } elsif ($target eq 'edit') {
1.27      matthew   725: 	$result.=&Apache::edit::tag_end($target,$token);
1.4       matthew   726:     }
1.1       matthew   727:     return $result;
                    728: }
                    729: ##------------------------------------------------------------------- xlabel
                    730: sub start_xlabel {
                    731:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    732:     my $result='';
1.51      matthew   733:     if ($target eq 'web' || $target eq 'tex') {
1.81      albertel  734: 	$xlabel = &Apache::lonxml::get_all_text("/xlabel",$parser);
1.58      matthew   735: 	$xlabel=&Apache::run::evaluate($xlabel,$safeeval,$$parstack[-1]);
1.49      matthew   736: 	$xlabel =~ s/\n/ /g;
1.32      matthew   737: 	if (length($xlabel) > $max_str_len) {
                    738: 	    $xlabel = substr($xlabel,0,$max_str_len);
                    739: 	}
1.20      matthew   740:     } elsif ($target eq 'edit') {
1.25      matthew   741: 	$result.=&Apache::edit::tag_start($target,$token,'Plot Xlabel');
1.81      albertel  742: 	my $text=&Apache::lonxml::get_all_text("/xlabel",$parser);
1.39      matthew   743: 	$result.=&Apache::edit::end_row().
                    744: 	    &Apache::edit::start_spanning_row().
1.63      albertel  745: 	    &Apache::edit::editline('',$text,'',60);
1.20      matthew   746:     } elsif ($target eq 'modified') {
1.42      matthew   747: 	$result.=&Apache::edit::rebuild_tag($token);	
1.93      albertel  748: 	$result.=&Apache::edit::modifiedfield("/xlabel",$parser);
1.4       matthew   749:     }
1.1       matthew   750:     return $result;
                    751: }
                    752: 
                    753: sub end_xlabel {
                    754:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    755:     my $result = '';
1.51      matthew   756:     if ($target eq 'web' || $target eq 'tex') {
1.20      matthew   757:     } elsif ($target eq 'edit') {
1.27      matthew   758: 	$result.=&Apache::edit::tag_end($target,$token);
1.4       matthew   759:     }
1.1       matthew   760:     return $result;
                    761: }
1.21      matthew   762: 
1.1       matthew   763: ##------------------------------------------------------------------- ylabel
                    764: sub start_ylabel {
                    765:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    766:     my $result='';
1.51      matthew   767:     if ($target eq 'web' || $target eq 'tex') {
1.81      albertel  768: 	$ylabel = &Apache::lonxml::get_all_text("/ylabel",$parser);
1.58      matthew   769: 	$ylabel = &Apache::run::evaluate($ylabel,$safeeval,$$parstack[-1]);
1.49      matthew   770: 	$ylabel =~ s/\n/ /g;
1.32      matthew   771: 	if (length($ylabel) > $max_str_len) {
                    772: 	    $ylabel = substr($ylabel,0,$max_str_len);
                    773: 	}
1.20      matthew   774:     } elsif ($target eq 'edit') {
1.25      matthew   775: 	$result .= &Apache::edit::tag_start($target,$token,'Plot Ylabel');
1.81      albertel  776: 	my $text = &Apache::lonxml::get_all_text("/ylabel",$parser);
1.39      matthew   777: 	$result .= &Apache::edit::end_row().
                    778: 	    &Apache::edit::start_spanning_row().
1.63      albertel  779: 	    &Apache::edit::editline('',$text,'',60);
1.20      matthew   780:     } elsif ($target eq 'modified') {
1.42      matthew   781: 	$result.=&Apache::edit::rebuild_tag($token);
1.93      albertel  782: 	$result.=&Apache::edit::modifiedfield("/ylabel",$parser);
1.4       matthew   783:     }
1.1       matthew   784:     return $result;
                    785: }
                    786: 
                    787: sub end_ylabel {
                    788:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    789:     my $result = '';
1.51      matthew   790:     if ($target eq 'web' || $target eq 'tex') {
1.20      matthew   791:     } elsif ($target eq 'edit') {
1.27      matthew   792: 	$result.=&Apache::edit::tag_end($target,$token);
1.4       matthew   793:     }
1.1       matthew   794:     return $result;
                    795: }
1.21      matthew   796: 
1.1       matthew   797: ##------------------------------------------------------------------- label
                    798: sub start_label {
                    799:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    800:     my $result='';
1.51      matthew   801:     if ($target eq 'web' || $target eq 'tex') {
1.17      matthew   802: 	my %label;
                    803: 	&get_attributes(\%label,\%label_defaults,$parstack,$safeeval,
1.11      matthew   804: 		    $tagstack->[-1]);
1.81      albertel  805: 	my $text = &Apache::lonxml::get_all_text("/label",$parser);
1.58      matthew   806: 	$text = &Apache::run::evaluate($text,$safeeval,$$parstack[-1]);
1.49      matthew   807: 	$text =~ s/\n/ /g;
1.32      matthew   808: 	$text = substr($text,0,$max_str_len) if (length($text) > $max_str_len);
                    809: 	$label{'text'} = $text;
1.17      matthew   810: 	push(@labels,\%label);
1.20      matthew   811:     } elsif ($target eq 'edit') {
1.25      matthew   812: 	$result .= &Apache::edit::tag_start($target,$token,'Plot Label');
1.21      matthew   813: 	$result .= &edit_attributes($target,$token,\%label_defaults);
1.81      albertel  814: 	my $text = &Apache::lonxml::get_all_text("/label",$parser);
1.39      matthew   815: 	$result .= &Apache::edit::end_row().
                    816: 	    &Apache::edit::start_spanning_row().
1.63      albertel  817: 	    &Apache::edit::editline('',$text,'',60);
1.20      matthew   818:     } elsif ($target eq 'modified') {
1.42      matthew   819: 	&Apache::edit::get_new_args
1.24      matthew   820: 	    ($token,$parstack,$safeeval,keys(%label_defaults));
1.42      matthew   821: 	$result.=&Apache::edit::rebuild_tag($token);
1.93      albertel  822: 	$result.=&Apache::edit::modifiedfield("/label",$parser);
1.4       matthew   823:     }
1.1       matthew   824:     return $result;
                    825: }
                    826: 
                    827: sub end_label {
                    828:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    829:     my $result = '';
1.51      matthew   830:     if ($target eq 'web' || $target eq 'tex') {
1.20      matthew   831:     } elsif ($target eq 'edit') {
1.21      matthew   832: 	$result.=&Apache::edit::tag_end($target,$token);
1.4       matthew   833:     }
1.1       matthew   834:     return $result;
                    835: }
                    836: 
                    837: ##------------------------------------------------------------------- curve
                    838: sub start_curve {
                    839:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    840:     my $result='';
1.25      matthew   841:     &Apache::lonxml::register('Apache::lonplot',('function','data'));
                    842:     push (@Apache::lonxml::namespace,'curve');
1.51      matthew   843:     if ($target eq 'web' || $target eq 'tex') {
1.17      matthew   844: 	my %curve;
                    845: 	&get_attributes(\%curve,\%curve_defaults,$parstack,$safeeval,
1.11      matthew   846: 		    $tagstack->[-1]);
1.17      matthew   847: 	push (@curves,\%curve);
1.20      matthew   848:     } elsif ($target eq 'edit') {
1.26      matthew   849: 	$result .= &Apache::edit::tag_start($target,$token,'Curve');
1.60      matthew   850: 	$result .= &edit_attributes($target,$token,\%curve_defaults,
                    851:                                     \@curve_edit_order);
1.20      matthew   852:     } elsif ($target eq 'modified') {
                    853: 	my $constructtag=&Apache::edit::get_new_args
1.35      matthew   854: 	    ($token,$parstack,$safeeval,keys(%curve_defaults));
1.20      matthew   855: 	if ($constructtag) {
                    856: 	    $result = &Apache::edit::rebuild_tag($token);
                    857: 	    $result.= &Apache::edit::handle_insert();
                    858: 	}
1.4       matthew   859:     }
1.1       matthew   860:     return $result;
                    861: }
                    862: 
                    863: sub end_curve {
                    864:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    865:     my $result = '';
1.25      matthew   866:     pop @Apache::lonxml::namespace;
                    867:     &Apache::lonxml::deregister('Apache::lonplot',('function','data'));
1.51      matthew   868:     if ($target eq 'web' || $target eq 'tex') {
1.20      matthew   869:     } elsif ($target eq 'edit') {
1.21      matthew   870: 	$result.=&Apache::edit::tag_end($target,$token);
1.4       matthew   871:     }
1.1       matthew   872:     return $result;
                    873: }
1.21      matthew   874: 
1.1       matthew   875: ##------------------------------------------------------------ curve function
                    876: sub start_function {
                    877:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    878:     my $result='';
1.51      matthew   879:     if ($target eq 'web' || $target eq 'tex') {
1.17      matthew   880: 	if (exists($curves[-1]->{'data'})) {
1.85      matthew   881: 	    &Apache::lonxml::warning
                    882:                 ('Use of the <b>curve function</b> tag precludes use of '.
                    883:                  ' the <b>curve data</b> tag.  '.
                    884:                  'The curve data tag will be omitted in favor of the '.
                    885:                  'curve function declaration.');
1.17      matthew   886: 	    delete $curves[-1]->{'data'} ;
                    887: 	}
1.81      albertel  888:         my $function = &Apache::lonxml::get_all_text("/function",$parser);
1.58      matthew   889: 	$function = &Apache::run::evaluate($function,$safeeval,$$parstack[-1]);
                    890: 	$curves[-1]->{'function'} = $function; 
1.20      matthew   891:     } elsif ($target eq 'edit') {
1.37      matthew   892: 	$result .= &Apache::edit::tag_start($target,$token,'Gnuplot compatible curve function');
1.81      albertel  893: 	my $text = &Apache::lonxml::get_all_text("/function",$parser);
1.39      matthew   894: 	$result .= &Apache::edit::end_row().
                    895: 	    &Apache::edit::start_spanning_row().
1.63      albertel  896: 	    &Apache::edit::editline('',$text,'',60);
1.20      matthew   897:     } elsif ($target eq 'modified') {
1.42      matthew   898: 	$result.=&Apache::edit::rebuild_tag($token);
1.93      albertel  899: 	$result.=&Apache::edit::modifiedfield("/function",$parser);
1.4       matthew   900:     }
1.1       matthew   901:     return $result;
                    902: }
                    903: 
                    904: sub end_function {
                    905:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    906:     my $result = '';
1.51      matthew   907:     if ($target eq 'web' || $target eq 'tex') {
1.20      matthew   908:     } elsif ($target eq 'edit') {
1.26      matthew   909: 	$result .= &Apache::edit::end_table();
1.4       matthew   910:     }
1.1       matthew   911:     return $result;
                    912: }
1.21      matthew   913: 
1.1       matthew   914: ##------------------------------------------------------------ curve  data
                    915: sub start_data {
                    916:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    917:     my $result='';
1.51      matthew   918:     if ($target eq 'web' || $target eq 'tex') {
1.17      matthew   919: 	if (exists($curves[-1]->{'function'})) {
1.85      matthew   920: 	    &Apache::lonxml::warning
                    921:                 ('Use of the <b>curve function</b> tag precludes use of '.
                    922:                  ' the <b>curve data</b> tag.  '.
                    923:                  'The curve function tag will be omitted in favor of the '.
                    924:                  'curve data declaration.');
1.17      matthew   925: 	    delete($curves[-1]->{'function'});
                    926: 	}
1.81      albertel  927: 	my $datatext = &Apache::lonxml::get_all_text("/data",$parser);
1.58      matthew   928: 	$datatext=&Apache::run::evaluate($datatext,$safeeval,$$parstack[-1]);
1.40      matthew   929: 	# Deal with cases where we're given an array...
                    930: 	if ($datatext =~ /^\@/) {
                    931: 	    $datatext = &Apache::run::run('return "'.$datatext.'"',
                    932: 					  $safeeval,1);
                    933: 	}
1.49      matthew   934: 	$datatext =~ s/\s+/ /g;
1.17      matthew   935: 	# Need to do some error checking on the @data array - 
                    936: 	# make sure it's all numbers and make sure each array 
                    937: 	# is of the same length.
                    938: 	my @data;
1.35      matthew   939: 	if ($datatext =~ /,/) { # comma deliminated
1.17      matthew   940: 	    @data = split /,/,$datatext;
1.95      www       941: 	} else { # Assume it's space separated.
1.17      matthew   942: 	    @data = split / /,$datatext;
                    943: 	}
                    944: 	for (my $i=0;$i<=$#data;$i++) {
                    945: 	    # Check that it's non-empty
1.19      matthew   946: 	    if (! defined($data[$i])) {
                    947: 		&Apache::lonxml::warning(
1.85      matthew   948: 		    'undefined curve data value.  Replacing with '.
1.19      matthew   949: 		    ' pi/e = 1.15572734979092');
                    950: 		$data[$i] = 1.15572734979092;
                    951: 	    }
1.17      matthew   952: 	    # Check that it's a number
1.19      matthew   953: 	    if (! &$real_test($data[$i]) & ! &$int_test($data[$i])) {
                    954: 		&Apache::lonxml::warning(
1.85      matthew   955: 		    'Bad curve data value of '.$data[$i].'  Replacing with '.
1.19      matthew   956: 		    ' pi/e = 1.15572734979092');
                    957: 		$data[$i] = 1.15572734979092;
                    958: 	    }
1.17      matthew   959: 	}
1.35      matthew   960: 	# complain if the number of data points is not the same as
                    961: 	# in previous sets of data.
1.36      matthew   962: 	if (($curves[-1]->{'data'}) && ($#data != $#{@{$curves[-1]->{'data'}->[0]}})){
1.35      matthew   963: 	    &Apache::lonxml::warning
                    964: 		('Number of data points is not consistent with previous '.
                    965: 		 'number of data points');
                    966: 	}
1.17      matthew   967: 	push  @{$curves[-1]->{'data'}},\@data;
1.20      matthew   968:     } elsif ($target eq 'edit') {
1.37      matthew   969: 	$result .= &Apache::edit::tag_start($target,$token,'Comma or space deliminated curve data');
1.81      albertel  970: 	my $text = &Apache::lonxml::get_all_text("/data",$parser);
1.39      matthew   971: 	$result .= &Apache::edit::end_row().
                    972: 	    &Apache::edit::start_spanning_row().
1.63      albertel  973: 	    &Apache::edit::editline('',$text,'',60);
1.20      matthew   974:     } elsif ($target eq 'modified') {
1.42      matthew   975: 	$result.=&Apache::edit::rebuild_tag($token);
1.93      albertel  976: 	$result.=&Apache::edit::modifiedfield("/data",$parser);
1.4       matthew   977:     }
1.1       matthew   978:     return $result;
                    979: }
                    980: 
                    981: sub end_data {
                    982:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    983:     my $result = '';
1.51      matthew   984:     if ($target eq 'web' || $target eq 'tex') {
1.20      matthew   985:     } elsif ($target eq 'edit') {
1.26      matthew   986: 	$result .= &Apache::edit::end_table();
1.4       matthew   987:     }
1.1       matthew   988:     return $result;
                    989: }
                    990: 
                    991: ##------------------------------------------------------------------- axis
                    992: sub start_axis {
                    993:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    994:     my $result='';
1.51      matthew   995:     if ($target eq 'web' || $target eq 'tex') {
1.17      matthew   996: 	&get_attributes(\%axis,\%axis_defaults,$parstack,$safeeval,
                    997: 			$tagstack->[-1]);
1.20      matthew   998:     } elsif ($target eq 'edit') {
1.25      matthew   999: 	$result .= &Apache::edit::tag_start($target,$token,'Plot Axes');
1.65      matthew  1000: 	$result .= &edit_attributes($target,$token,\%axis_defaults,
                   1001: 				    \@axis_edit_order);
1.20      matthew  1002:     } elsif ($target eq 'modified') {
1.29      matthew  1003: 	my $constructtag=&Apache::edit::get_new_args
                   1004: 	    ($token,$parstack,$safeeval,keys(%axis_defaults));
                   1005: 	if ($constructtag) {
                   1006: 	    $result = &Apache::edit::rebuild_tag($token);
                   1007: 	}
1.4       matthew  1008:     }
1.1       matthew  1009:     return $result;
                   1010: }
                   1011: 
                   1012: sub end_axis {
                   1013:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1014:     my $result = '';
1.51      matthew  1015:     if ($target eq 'web' || $target eq 'tex') {
1.20      matthew  1016:     } elsif ($target eq 'edit') {
1.21      matthew  1017: 	$result.=&Apache::edit::tag_end($target,$token);
1.20      matthew  1018:     } elsif ($target eq 'modified') {
1.4       matthew  1019:     }
1.1       matthew  1020:     return $result;
                   1021: }
                   1022: 
1.21      matthew  1023: ###################################################################
                   1024: ##                                                               ##
                   1025: ##        Utility Functions                                      ##
                   1026: ##                                                               ##
                   1027: ###################################################################
                   1028: 
1.13      matthew  1029: ##----------------------------------------------------------- set_defaults
                   1030: sub set_defaults {
1.21      matthew  1031:     my ($var,$defaults) = @_;
1.13      matthew  1032:     my $key;
1.24      matthew  1033:     foreach $key (keys(%$defaults)) {
1.13      matthew  1034: 	$var->{$key} = $defaults->{$key}->{'default'};
                   1035:     }
                   1036: }
                   1037: 
1.1       matthew  1038: ##------------------------------------------------------------------- misc
1.2       matthew  1039: sub get_attributes{
1.21      matthew  1040:     my ($values,$defaults,$parstack,$safeeval,$tag) = @_;
1.24      matthew  1041:     foreach my $attr (keys(%{$defaults})) {
1.92      matthew  1042: 	if ($attr eq 'texwidth' || $attr eq 'texfont') {
1.86      albertel 1043: 	    $values->{$attr} = 
                   1044: 		&Apache::lonxml::get_param($attr,$parstack,$safeeval,undef,1);
                   1045: 	} else {
                   1046: 	    $values->{$attr} = 
                   1047: 		&Apache::lonxml::get_param($attr,$parstack,$safeeval);
                   1048: 	}
1.10      matthew  1049: 	if ($values->{$attr} eq '' | !defined($values->{$attr})) {
1.11      matthew  1050: 	    $values->{$attr} = $defaults->{$attr}->{'default'};
1.6       matthew  1051: 	    next;
                   1052: 	}
1.10      matthew  1053: 	my $test = $defaults->{$attr}->{'test'};
                   1054: 	if (! &$test($values->{$attr})) {
1.6       matthew  1055: 	    &Apache::lonxml::warning
                   1056: 		($tag.':'.$attr.': Bad value.'.'Replacing your value with : '
1.11      matthew  1057: 		 .$defaults->{$attr}->{'default'} );
                   1058: 	    $values->{$attr} = $defaults->{$attr}->{'default'};
1.10      matthew  1059: 	}
1.2       matthew  1060:     }
1.11      matthew  1061:     return ;
1.6       matthew  1062: }
1.40      matthew  1063: 
1.15      matthew  1064: ##------------------------------------------------------- write_gnuplot_file
1.6       matthew  1065: sub write_gnuplot_file {
1.51      matthew  1066:     my ($tmpdir,$filename,$target)= @_;
1.6       matthew  1067:     my $gnuplot_input = '';
1.10      matthew  1068:     my $curve;
1.107     foxr     1069:     my $pt = $Apache::lonplot::plot{'texfont'};
1.100     matthew  1070:     #
                   1071:     # Check to be sure we do not have any empty curves
                   1072:     my @curvescopy;
                   1073:     foreach my $curve (@curves) {
                   1074:         if (exists($curve->{'function'})) {
                   1075:             if ($curve->{'function'} !~ /^\s*$/) {
                   1076:                 push(@curvescopy,$curve);
                   1077:             }
                   1078:         } elsif (exists($curve->{'data'})) {
                   1079:             foreach my $data (@{$curve->{'data'}}) {
                   1080:                 if (scalar(@$data) > 0) {
                   1081:                     push(@curvescopy,$curve);
                   1082:                     last;
                   1083:                 }
                   1084:             }
                   1085:         }
                   1086:     }
                   1087:     @curves = @curvescopy;
1.6       matthew  1088:     # Collect all the colors
                   1089:     my @Colors;
1.107     foxr     1090:     push @Colors, $Apache::lonplot::plot{'bgcolor'};
                   1091:     push @Colors, $Apache::lonplot::plot{'fgcolor'}; 
                   1092:     push @Colors, (defined($axis{'color'})?$axis{'color'}:$Apache::lonplot::plot{'fgcolor'});
1.9       matthew  1093:     foreach $curve (@curves) {
                   1094: 	push @Colors, ($curve->{'color'} ne '' ? 
                   1095: 		       $curve->{'color'}       : 
1.107     foxr     1096: 		       $Apache::lonplot::plot{'fgcolor'}        );
1.6       matthew  1097:     }
                   1098:     # set term
1.51      matthew  1099:     if ($target eq 'web') {
1.103     matthew  1100: 	$gnuplot_input .= 'set term '.$weboutputformat .' ';
1.107     foxr     1101: 	$gnuplot_input .= 'transparent ' if ($Apache::lonplot::plot{'transparent'} eq 'on');
                   1102: 	$gnuplot_input .= $Apache::lonplot::plot{'font'} . ' ';
                   1103: 	$gnuplot_input .= 'size '.$Apache::lonplot::plot{'width'}.','.$Apache::lonplot::plot{'height'}.' ';
1.51      matthew  1104: 	$gnuplot_input .= "@Colors\n";
                   1105: 	# set output
                   1106: 	$gnuplot_input .= "set output\n";
                   1107:     } elsif ($target eq 'tex') {
1.107     foxr     1108: 	$gnuplot_input .= "set term postscript eps $Apache::lonplot::plot{'plotcolor'} solid \"Helvetica\" $pt \n";
1.68      sakharuk 1109: 	$gnuplot_input .= "set output \"/home/httpd/perl/tmp/".
                   1110: 	    &Apache::lonnet::unescape($filename).".eps\"\n";
1.87      matthew  1111:     }
                   1112:     # cartesian or polar?
1.107     foxr     1113:     if (lc($Apache::lonplot::plot{'plottype'}) eq 'polar') {
1.87      matthew  1114:         $gnuplot_input .= 'set polar'.$/;
                   1115:     } else {
                   1116:         # Assume Cartesian
1.51      matthew  1117:     }
1.110   ! albertel 1118:     # solid or pattern for boxes?
        !          1119:     if (lc($Apache::lonplot::plot{'fillstyle'}) eq 'solid') {
        !          1120:         $gnuplot_input .= 'set style fill solid '.
        !          1121: 	    $Apache::lonplot::plot{'solid'}.$Apache::lonplot::plot{'box_border'}.$/;
        !          1122:     } elsif (lc($Apache::lonplot::plot{'fillstyle'}) eq 'pattern') {
        !          1123:         $gnuplot_input .= 'set style fill pattern '.$Apache::lonplot::plot{'pattern'}.$Apache::lonplot::plot{'box_border'}.$/;
        !          1124:     } elsif (lc($Apache::lonplot::plot{'fillstyle'}) eq 'empty') {
        !          1125:     }
1.101     matthew  1126:     # margin
1.107     foxr     1127:     if (lc($Apache::lonplot::plot{'lmargin'}) ne 'default') {
                   1128:         $gnuplot_input .= 'set lmargin '.$Apache::lonplot::plot{'lmargin'}.$/;
1.101     matthew  1129:     }
1.107     foxr     1130:     if (lc($Apache::lonplot::plot{'rmargin'}) ne 'default') {
                   1131:         $gnuplot_input .= 'set rmargin '.$Apache::lonplot::plot{'rmargin'}.$/;
1.101     matthew  1132:     }
1.107     foxr     1133:     if (lc($Apache::lonplot::plot{'tmargin'}) ne 'default') {
                   1134:         $gnuplot_input .= 'set tmargin '.$Apache::lonplot::plot{'tmargin'}.$/;
1.101     matthew  1135:     }
1.107     foxr     1136:     if (lc($Apache::lonplot::plot{'bmargin'}) ne 'default') {
                   1137:         $gnuplot_input .= 'set bmargin '.$Apache::lonplot::plot{'bmargin'}.$/;
1.101     matthew  1138:     }
                   1139:     # tic scales
                   1140:     $gnuplot_input .= 'set ticscale '.
1.107     foxr     1141:         $Apache::lonplot::plot{'major_ticscale'}.' '.$Apache::lonplot::plot{'minor_ticscale'}.$/;
1.110   ! albertel 1142:     #boxwidth
        !          1143:     if (lc($Apache::lonplot::plot{'boxwidth'}) ne '') {
        !          1144: 	$gnuplot_input .= 'set boxwidth '.$Apache::lonplot::plot{'boxwidth'}.$/;
        !          1145:     }
        !          1146:     # gridlayer
        !          1147:     $gnuplot_input .= 'set grid noxtics noytics front '.$/ 
        !          1148: 	if ($Apache::lonplot::plot{'gridlayer'} eq 'on');
        !          1149: 
1.7       matthew  1150:     # grid
1.107     foxr     1151:     $gnuplot_input .= 'set grid'.$/ if ($Apache::lonplot::plot{'grid'} eq 'on');
1.7       matthew  1152:     # border
1.107     foxr     1153:     $gnuplot_input .= ($Apache::lonplot::plot{'border'} eq 'on'?
1.9       matthew  1154: 		       'set border'.$/           :
1.67      matthew  1155: 		       'set noborder'.$/         );
1.77      matthew  1156:     # sampling rate for non-data curves
1.107     foxr     1157:     $gnuplot_input .= "set samples $Apache::lonplot::plot{'samples'}\n";
1.67      matthew  1158:     # title, xlabel, ylabel
1.45      matthew  1159:     # titles
1.89      matthew  1160:     if ($target eq 'tex') {
1.92      matthew  1161:         $gnuplot_input .= "set title  \"$title\" font \"Helvetica,".$pt."pt\"\n"  if (defined($title)) ;
                   1162:         $gnuplot_input .= "set xlabel \"$xlabel\" font \"Helvetica,".$pt."pt\" \n" if (defined($xlabel));
                   1163:         $gnuplot_input .= "set ylabel \"$ylabel\" font \"Helvetica,".$pt."pt\"\n" if (defined($ylabel));
1.89      matthew  1164:     } else {
                   1165:         $gnuplot_input .= "set title  \"$title\"  \n"  if (defined($title)) ;
                   1166:         $gnuplot_input .= "set xlabel \"$xlabel\" \n" if (defined($xlabel));
                   1167:         $gnuplot_input .= "set ylabel \"$ylabel\" \n" if (defined($ylabel));
                   1168:     }
1.45      matthew  1169:     # tics
                   1170:     if (%xtics) {    
                   1171: 	$gnuplot_input .= "set xtics $xtics{'location'} ";
1.46      matthew  1172: 	$gnuplot_input .= ( $xtics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1.45      matthew  1173: 	$gnuplot_input .= "$xtics{'start'}, ";
                   1174: 	$gnuplot_input .= "$xtics{'increment'}, ";
                   1175: 	$gnuplot_input .= "$xtics{'end'}\n";
1.89      matthew  1176:         if ($xtics{'minorfreq'} != 0) {
                   1177:             $gnuplot_input .= "set mxtics ".$xtics{'minorfreq'}."\n";
                   1178:         } 
1.45      matthew  1179:     }
                   1180:     if (%ytics) {    
                   1181: 	$gnuplot_input .= "set ytics $ytics{'location'} ";
1.46      matthew  1182: 	$gnuplot_input .= ( $ytics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1.45      matthew  1183: 	$gnuplot_input .= "$ytics{'start'}, ";
                   1184: 	$gnuplot_input .= "$ytics{'increment'}, ";
                   1185:         $gnuplot_input .= "$ytics{'end'}\n";
1.89      matthew  1186:         if ($ytics{'minorfreq'} != 0) {
                   1187:             $gnuplot_input .= "set mytics ".$ytics{'minorfreq'}."\n";
                   1188:         } 
1.45      matthew  1189:     }
                   1190:     # axis
1.23      matthew  1191:     if (%axis) {
1.13      matthew  1192: 	$gnuplot_input .= "set xrange \[$axis{'xmin'}:$axis{'xmax'}\]\n";
                   1193: 	$gnuplot_input .= "set yrange \[$axis{'ymin'}:$axis{'ymax'}\]\n";
1.6       matthew  1194:     }
                   1195:     # Key
1.23      matthew  1196:     if (%key) {
1.9       matthew  1197: 	$gnuplot_input .= 'set key '.$key{'pos'}.' ';
                   1198: 	if ($key{'title'} ne '') {
1.67      matthew  1199: 	    $gnuplot_input .= 'title "'.$key{'title'}.'" ';
1.11      matthew  1200: 	} 
                   1201: 	$gnuplot_input .= ($key{'box'} eq 'on' ? 'box ' : 'nobox ').$/;
1.6       matthew  1202:     } else {
1.9       matthew  1203: 	$gnuplot_input .= 'set nokey'.$/;
1.13      matthew  1204:     }
1.6       matthew  1205:     # labels
1.10      matthew  1206:     my $label;
1.6       matthew  1207:     foreach $label (@labels) {
                   1208: 	$gnuplot_input .= 'set label "'.$label->{'text'}.'" at '.
1.103     matthew  1209: 	    $label->{'xpos'}.','.$label->{'ypos'}.' '.$label->{'justify'};
                   1210:         if ($target eq 'tex') {
                   1211:             $gnuplot_input .=' font "Helvetica,'.$pt.'pt"' ;
                   1212:         }
                   1213:         $gnuplot_input .= $/;
1.6       matthew  1214:     }
1.74      matthew  1215:     if ($target eq 'tex') {
1.107     foxr     1216:         $gnuplot_input .="set size 1,".$Apache::lonplot::plot{'height'}/$Apache::lonplot::plot{'width'}*1.38;
1.74      matthew  1217:         $gnuplot_input .="\n";
                   1218:         }
1.6       matthew  1219:     # curves
                   1220:     $gnuplot_input .= 'plot ';
1.9       matthew  1221:     for (my $i = 0;$i<=$#curves;$i++) {
                   1222: 	$curve = $curves[$i];
                   1223: 	$gnuplot_input.= ', ' if ($i > 0);
1.6       matthew  1224: 	if (exists($curve->{'function'})) {
1.9       matthew  1225: 	    $gnuplot_input.= 
                   1226: 		$curve->{'function'}.' title "'.
                   1227: 		$curve->{'name'}.'" with '.
1.72      matthew  1228:                 $curve->{'linestyle'};
1.73      sakharuk 1229:             $gnuplot_input.= ' linewidth 4 ' if ($target eq 'tex');
1.60      matthew  1230:             if (($curve->{'linestyle'} eq 'points')      ||
                   1231:                 ($curve->{'linestyle'} eq 'linespoints') ||
                   1232:                 ($curve->{'linestyle'} eq 'errorbars')   ||
                   1233:                 ($curve->{'linestyle'} eq 'xerrorbars')  ||
                   1234:                 ($curve->{'linestyle'} eq 'yerrorbars')  ||
                   1235:                 ($curve->{'linestyle'} eq 'xyerrorbars')) {
1.62      matthew  1236:                 $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
1.60      matthew  1237:                 $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1.110   ! albertel 1238:             } elsif ($curve->{'linestyle'} eq 'filledcurves') { 
        !          1239:                 $gnuplot_input.= ' '.$curve->{'limit'};
1.60      matthew  1240:             }
1.6       matthew  1241: 	} elsif (exists($curve->{'data'})) {
1.40      matthew  1242: 	    # Store data values in $datatext
                   1243: 	    my $datatext = '';
                   1244: 	    #   get new filename
1.70      matthew  1245: 	    my $datafilename = "$tmpdir/$filename.data.$i";
1.40      matthew  1246: 	    my $fh=Apache::File->new(">$datafilename");
                   1247: 	    # Compile data
1.6       matthew  1248: 	    my @Data = @{$curve->{'data'}};
1.9       matthew  1249: 	    my @Data0 = @{$Data[0]};
                   1250: 	    for (my $i =0; $i<=$#Data0; $i++) {
1.10      matthew  1251: 		my $dataset;
1.6       matthew  1252: 		foreach $dataset (@Data) {
1.9       matthew  1253: 		    $datatext .= $dataset->[$i] . ' ';
1.6       matthew  1254: 		}
1.9       matthew  1255: 		$datatext .= $/;
1.6       matthew  1256: 	    }
1.40      matthew  1257: 	    #   write file
                   1258: 	    print $fh $datatext;
                   1259: 	    close ($fh);
                   1260: 	    #   generate gnuplot text
                   1261: 	    $gnuplot_input.= '"'.$datafilename.'" title "'.
                   1262: 		$curve->{'name'}.'" with '.
                   1263: 		$curve->{'linestyle'};
1.73      sakharuk 1264:             $gnuplot_input.= ' linewidth 4 ' if ($target eq 'tex');
1.62      matthew  1265:             if (($curve->{'linestyle'} eq 'points')      ||
                   1266:                 ($curve->{'linestyle'} eq 'linespoints') ||
                   1267:                 ($curve->{'linestyle'} eq 'errorbars')   ||
                   1268:                 ($curve->{'linestyle'} eq 'xerrorbars')  ||
                   1269:                 ($curve->{'linestyle'} eq 'yerrorbars')  ||
                   1270:                 ($curve->{'linestyle'} eq 'xyerrorbars')) {
                   1271:                 $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
                   1272:                 $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1.110   ! albertel 1273:             } elsif ($curve->{'linestyle'} eq 'filledcurves') { 
        !          1274:                 $gnuplot_input.= ' '.$curve->{'limit'};
1.62      matthew  1275:             }
1.6       matthew  1276: 	}
                   1277:     }
1.40      matthew  1278:     # Write the output to a file.
1.70      matthew  1279:     my $fh=Apache::File->new(">$tmpdir$filename.data");
1.40      matthew  1280:     print $fh $gnuplot_input;
                   1281:     close($fh);
                   1282:     # That's all folks.
                   1283:     return ;
1.2       matthew  1284: }
1.21      matthew  1285: 
                   1286: #---------------------------------------------- check_inputs
                   1287: sub check_inputs {
                   1288:     ## Note: no inputs, no outputs - this acts only on global variables.
                   1289:     ## Make sure we have all the input we need:
1.107     foxr     1290:     if (! %Apache::lonplot::plot) { &set_defaults(\%Apache::lonplot::plot,\%gnuplot_defaults); }
1.23      matthew  1291:     if (! %key ) {} # No key for this plot, thats okay
1.34      matthew  1292: #    if (! %axis) { &set_defaults(\%axis,\%axis_defaults); }
1.21      matthew  1293:     if (! defined($title )) {} # No title for this plot, thats okay
                   1294:     if (! defined($xlabel)) {} # No xlabel for this plot, thats okay
                   1295:     if (! defined($ylabel)) {} # No ylabel for this plot, thats okay
                   1296:     if ($#labels < 0) { }      # No labels for this plot, thats okay
                   1297:     if ($#curves < 0) { 
                   1298: 	&Apache::lonxml::warning("No curves specified for plot!!!!");
                   1299: 	return '';
                   1300:     }
                   1301:     my $curve;
                   1302:     foreach $curve (@curves) {
                   1303: 	if (!defined($curve->{'function'})&&!defined($curve->{'data'})){
1.85      matthew  1304: 	    &Apache::lonxml::warning("One of the curves specified did not contain any curve data or curve function declarations\n");
1.21      matthew  1305: 	    return '';
                   1306: 	}
                   1307:     }
                   1308: }
                   1309: 
1.20      matthew  1310: #------------------------------------------------ make_edit
                   1311: sub edit_attributes {
1.34      matthew  1312:     my ($target,$token,$defaults,$keys) = @_;
                   1313:     my ($result,@keys);
                   1314:     if ($keys && ref($keys) eq 'ARRAY') {
                   1315:         @keys = @$keys;
                   1316:     } else {
                   1317: 	@keys = sort(keys(%$defaults));
                   1318:     }
                   1319:     foreach my $attr (@keys) {
1.35      matthew  1320: 	# append a ' ' to the description if it doesn't have one already.
                   1321: 	my $description = $defaults->{$attr}->{'description'};
                   1322: 	$description .= ' ' if ($description !~ / $/);
1.20      matthew  1323: 	if ($defaults->{$attr}->{'edit_type'} eq 'entry') {
1.35      matthew  1324: 	    $result .= &Apache::edit::text_arg
1.38      matthew  1325: 		($description,$attr,$token,
                   1326: 		 $defaults->{$attr}->{'size'});
1.20      matthew  1327: 	} elsif ($defaults->{$attr}->{'edit_type'} eq 'choice') {
1.102     albertel 1328: 	    $result .= &Apache::edit::select_or_text_arg
1.35      matthew  1329: 		($description,$attr,$defaults->{$attr}->{'choices'},$token);
1.45      matthew  1330: 	} elsif ($defaults->{$attr}->{'edit_type'} eq 'onoff') {
1.102     albertel 1331: 	    $result .= &Apache::edit::select_or_text_arg
1.35      matthew  1332: 		($description,$attr,['on','off'],$token);
1.20      matthew  1333: 	}
1.25      matthew  1334: 	$result .= '<br />';
1.20      matthew  1335:     }
                   1336:     return $result;
                   1337: }
1.1       matthew  1338: 
1.21      matthew  1339: 
                   1340: ###################################################################
                   1341: ##                                                               ##
                   1342: ##           Insertion functions for editing plots               ##
                   1343: ##                                                               ##
                   1344: ###################################################################
                   1345: 
1.47      matthew  1346: sub insert_gnuplot {
1.29      matthew  1347:     my $result = '';
1.20      matthew  1348:     #  plot attributes
1.61      matthew  1349:     $result .= "\n<gnuplot ";
1.47      matthew  1350:     foreach my $attr (keys(%gnuplot_defaults)) {
1.61      matthew  1351: 	$result .= "\n     $attr=\"$gnuplot_defaults{$attr}->{'default'}\"";
1.20      matthew  1352:     }
1.61      matthew  1353:     $result .= ">";
1.47      matthew  1354:     # Add the components (most are commented out for simplicity)
1.44      matthew  1355:     # $result .= &insert_key();
                   1356:     # $result .= &insert_axis();
                   1357:     # $result .= &insert_title();    
                   1358:     # $result .= &insert_xlabel();    
                   1359:     # $result .= &insert_ylabel();    
1.20      matthew  1360:     $result .= &insert_curve();
1.50      matthew  1361:     # close up the <gnuplot>
1.61      matthew  1362:     $result .= "\n</gnuplot>";
1.45      matthew  1363:     return $result;
                   1364: }
                   1365: 
1.46      matthew  1366: sub insert_tics {
                   1367:     my $result;
                   1368:     $result .= &insert_xtics() . &insert_ytics;
                   1369:     return $result;
                   1370: }
                   1371: 
1.45      matthew  1372: sub insert_xtics {
                   1373:     my $result;
1.46      matthew  1374:     $result .= "\n    <xtics ";
1.45      matthew  1375:     foreach my $attr (keys(%tic_defaults)) {
1.61      matthew  1376: 	$result .= "\n        $attr=\"$tic_defaults{$attr}->{'default'}\" ";
1.45      matthew  1377:     }
1.61      matthew  1378:     $result .= "/>";
1.45      matthew  1379:     return $result;
                   1380: }
                   1381: 
                   1382: sub insert_ytics {
                   1383:     my $result;
1.46      matthew  1384:     $result .= "\n    <ytics ";
1.45      matthew  1385:     foreach my $attr (keys(%tic_defaults)) {
1.61      matthew  1386: 	$result .= "\n        $attr=\"$tic_defaults{$attr}->{'default'}\" ";
1.45      matthew  1387:     }
1.61      matthew  1388:     $result .= "/>";
1.20      matthew  1389:     return $result;
                   1390: }
                   1391: 
                   1392: sub insert_key {
                   1393:     my $result;
1.61      matthew  1394:     $result .= "\n    <key ";
1.30      matthew  1395:     foreach my $attr (keys(%key_defaults)) {
1.61      matthew  1396: 	$result .= "\n         $attr=\"$key_defaults{$attr}->{'default'}\"";
1.20      matthew  1397:     }
1.61      matthew  1398:     $result .= " />";
1.20      matthew  1399:     return $result;
                   1400: }
                   1401: 
                   1402: sub insert_axis{
                   1403:     my $result;
1.46      matthew  1404:     $result .= "\n    <axis ";
1.30      matthew  1405:    foreach my $attr (keys(%axis_defaults)) {
1.61      matthew  1406: 	$result .= "\n         $attr=\"$axis_defaults{$attr}->{'default'}\"";
1.20      matthew  1407:     }
1.61      matthew  1408:     $result .= " />";
1.20      matthew  1409:     return $result;
                   1410: }
1.28      matthew  1411: 
1.61      matthew  1412: sub insert_title  { return "\n    <title></title>"; }
                   1413: sub insert_xlabel { return "\n    <xlabel></xlabel>"; }
                   1414: sub insert_ylabel { return "\n    <ylabel></ylabel>"; }
1.20      matthew  1415: 
                   1416: sub insert_label {
                   1417:     my $result;
1.46      matthew  1418:     $result .= "\n    <label ";
1.30      matthew  1419:     foreach my $attr (keys(%label_defaults)) {
1.61      matthew  1420: 	$result .= "\n         $attr=\"".
                   1421:             $label_defaults{$attr}->{'default'}."\"";
1.20      matthew  1422:     }
1.61      matthew  1423:     $result .= "></label>";
1.20      matthew  1424:     return $result;
                   1425: }
                   1426: 
                   1427: sub insert_curve {
                   1428:     my $result;
1.41      matthew  1429:     $result .= "\n    <curve ";
1.30      matthew  1430:     foreach my $attr (keys(%curve_defaults)) {
1.61      matthew  1431: 	$result .= "\n         $attr=\"".
                   1432: 	    $curve_defaults{$attr}->{'default'}."\"";
1.20      matthew  1433:     }
1.61      matthew  1434:     $result .= " >";
                   1435:     $result .= &insert_data().&insert_data()."\n    </curve>";
1.20      matthew  1436: }
1.4       matthew  1437: 
1.20      matthew  1438: sub insert_function {
                   1439:     my $result;
1.61      matthew  1440:     $result .= "\n        <function></function>";
1.20      matthew  1441:     return $result;
                   1442: }
1.4       matthew  1443: 
1.20      matthew  1444: sub insert_data {
                   1445:     my $result;
1.61      matthew  1446:     $result .= "\n        <data></data>";
1.20      matthew  1447:     return $result;
                   1448: }
1.4       matthew  1449: 
1.48      matthew  1450: ##----------------------------------------------------------------------
1.20      matthew  1451: 1;
                   1452: __END__
1.4       matthew  1453: 
                   1454: 

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