Annotation of loncom/xml/lonplot.pm, revision 1.118

1.1       matthew     1: # The LearningOnline Network with CAPA
                      2: # Dynamic plot
                      3: #
1.118   ! albertel    4: # $Id: lonplot.pm,v 1.117 2007/05/23 22:36:28 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 lib '/home/httpd/lib/perl/';
                     40: use LONCAPA;
                     41:  
1.10      matthew    42: 
1.97      matthew    43: use vars qw/$weboutputformat $versionstring/;
                     44: 
1.109     foxr       45: 
1.108     foxr       46: 
1.33      harris41   47: BEGIN {
1.97      matthew    48:     &Apache::lonxml::register('Apache::lonplot',('gnuplot'));
                     49:     #
                     50:     # Determine the version of GNUPLOT
                     51:     $weboutputformat = 'gif';
1.99      matthew    52:     $versionstring = `gnuplot --version 2>/dev/null`;
1.97      matthew    53:     if ($versionstring =~ /^gnuplot 4/) {
                     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| )+$/};
1.1       matthew   120: my $sml_test       = sub {$_[0]=~/^(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 = 
1.82      matthew   130:     qw/alttag bgcolor fgcolor height width font transparent grid samples 
1.115     albertel  131:     border align texwidth texfont plotcolor plottype gridtype lmargin rmargin
                    132:     tmargin bmargin major_ticscale minor_ticscale boxwidth gridlayer fillstyle
1.110     albertel  133:     pattern solid/;
1.101     matthew   134: 
1.105     matthew   135: my $margin_choices = ['default',0..20];
1.48      matthew   136: 
1.47      matthew   137: my %gnuplot_defaults = 
1.1       matthew   138:     (
1.64      matthew   139:      alttag       => {
                    140: 	 default     => 'dynamically generated plot',
                    141: 	 test        => $words_test,
                    142: 	 description => 'brief description of the plot',
                    143:       	 edit_type   => 'entry',
                    144: 	 size        => '40'
                    145: 	 },
1.20      matthew   146:      height       => {
1.65      matthew   147: 	 default     => 300,
1.20      matthew   148: 	 test        => $int_test,
1.29      matthew   149: 	 description => 'height of image (pixels)',
1.38      matthew   150:       	 edit_type   => 'entry',
                    151: 	 size        => '10'
1.20      matthew   152: 	 },
                    153:      width        => {
1.65      matthew   154: 	 default     => 400,
1.20      matthew   155: 	 test        => $int_test,
1.29      matthew   156: 	 description => 'width of image (pixels)',
1.38      matthew   157: 	 edit_type   => 'entry',
                    158: 	 size        => '10'
1.20      matthew   159: 	 },
                    160:      bgcolor      => {
                    161: 	 default     => 'xffffff',
                    162: 	 test        => $color_test, 
                    163: 	 description => 'background color of image (xffffff)',
1.38      matthew   164: 	 edit_type   => 'entry',
                    165: 	 size        => '10'
1.20      matthew   166: 	 },
                    167:      fgcolor      => {
                    168: 	 default     => 'x000000',
                    169: 	 test        => $color_test,
                    170: 	 description => 'foreground color of image (x000000)',
1.38      matthew   171: 	 edit_type   => 'entry',
                    172: 	 size        => '10'
1.20      matthew   173: 	 },
                    174:      transparent  => {
                    175: 	 default     => 'off',
                    176: 	 test        => $onoff_test, 
1.34      matthew   177: 	 description => 'Transparent image',
1.45      matthew   178: 	 edit_type   => 'onoff'
1.20      matthew   179: 	 },
                    180:      grid         => {
1.65      matthew   181: 	 default     => 'on',
1.20      matthew   182: 	 test        => $onoff_test, 
1.34      matthew   183: 	 description => 'Display grid',
1.45      matthew   184: 	 edit_type   => 'onoff'
1.20      matthew   185: 	 },
1.110     albertel  186:      gridlayer    => {
                    187: 	 default     => 'off',
                    188: 	 test        => $onoff_test, 
                    189: 	 description => 'Display grid front layer over filled boxes or filled curves',
                    190: 	 edit_type   => 'onoff'
                    191: 	 },
                    192:      box_border   => {
                    193: 	 default     => 'noborder',
                    194: 	 test        => sub {$_[0]=~/^(noborder|border)$/},
                    195: 	 description => 'Draw border for boxes',
                    196: 	 edit_type   => 'choice',
                    197: 	 choices     => ['border','noborder']
                    198: 	 },
1.20      matthew   199:      border       => {
                    200: 	 default     => 'on',
                    201: 	 test        => $onoff_test, 
1.34      matthew   202: 	 description => 'Draw border around plot',
1.45      matthew   203: 	 edit_type   => 'onoff'
1.20      matthew   204: 	 },
                    205:      font         => {
                    206: 	 default     => 'medium',
                    207: 	 test        => $sml_test,
                    208: 	 description => 'Size of font to use',
                    209: 	 edit_type   => 'choice',
                    210: 	 choices     => ['small','medium','large']
                    211: 	 },
1.110     albertel  212:      samples      => {
1.77      matthew   213: 	 default     => '100',
                    214: 	 test        => $int_test,
                    215: 	 description => 'Number of samples for non-data plots',
                    216: 	 edit_type   => 'choice',
                    217: 	 choices     => ['100','200','500','1000','2000','5000']
                    218: 	 },
1.20      matthew   219:      align        => {
1.116     albertel  220: 	 default     => 'middle',
                    221: 	 test        => sub {$_[0]=~/^(left|right|middle|center)$/},
1.20      matthew   222: 	 description => 'alignment for image in html',
                    223: 	 edit_type   => 'choice',
1.116     albertel  224: 	 choices     => ['left','right','middle']
1.82      matthew   225: 	 },
                    226:      texwidth     => {
                    227:          default     => '93',
                    228:          test        => $int_test,
                    229:          description => 'Width of plot when printed (mm)',
                    230:          edit_type   => 'entry',
                    231:          size        => '5'
                    232:          },
1.110     albertel  233:      texfont      => {
1.92      matthew   234:          default     => '22',
                    235:          test        => $int_test,
                    236:          description => 'Font size to use in TeX output (pts):',
                    237:          edit_type   => 'choice',
1.96      matthew   238:          choices     => [qw/8 10 12 14 16 18 20 22 24 26 28 30 32 34 36/],
1.92      matthew   239:          },
1.110     albertel  240:      plotcolor    => {
1.105     matthew   241:          default     => 'monochrome',
                    242:          test        => sub {$_[0]=~/^(monochrome|color|colour)$/},
                    243:          description => 'Color setting for printing:',
                    244:          edit_type   => 'choice',
                    245:          choices     => [qw/monochrome color colour/],
                    246:          },
1.110     albertel  247:      pattern      => {
                    248: 	 default     => '',
                    249: 	 test        => $int_test,
                    250: 	 description => 'pattern value for boxes:',
                    251: 	 edit_type   => 'choice',
                    252:          choices     => [0,1,2,3,4,5,6]
                    253:          },
                    254:      solid        => {
                    255:          default     => 0,
                    256:          test        => $real_test,
                    257:          description => 'The density of fill style for boxes',
                    258:          edit_type   => 'entry',
                    259:          size        => '5'
                    260:          },
                    261:      fillstyle    => {
                    262: 	 default     => 'empty',
                    263: 	 test        => sub {$_[0]=~/^(empty|solid|pattern)$/},
                    264: 	 description => 'Filled style for boxes:',
                    265: 	 edit_type   => 'choice',
                    266:          choices     => ['empty','solid','pattern']
                    267:          },
                    268:      plottype     => {
1.87      matthew   269: 	 default     => 'Cartesian',
                    270: 	 test        => sub {$_[0]=~/^(Polar|Cartesian)$/},
                    271: 	 description => 'Plot type:',
                    272: 	 edit_type   => 'choice',
1.94      matthew   273:          choices     => ['Cartesian','Polar']
1.87      matthew   274:          },
1.115     albertel  275:      gridtype     => {
                    276: 	 default     => 'Cartesian',
1.118   ! albertel  277: 	 test        => sub {$_[0]=~/^(Polar|Cartesian|Linear-Log|Log-Linear|Log-Log)$/},
1.115     albertel  278: 	 description => 'Grid type:',
                    279: 	 edit_type   => 'choice',
1.118   ! albertel  280:          choices     => ['Cartesian','Polar','Linear-Log','Log-Linear','Log-Log']
1.115     albertel  281:          },
1.110     albertel  282:      lmargin      => {
1.101     matthew   283: 	 default     => 'default',
                    284: 	 test        => sub {$_[0]=~/^(default|\d+)$/},
                    285: 	 description => 'Left margin width (pts):',
                    286: 	 edit_type   => 'choice',
                    287:          choices     => $margin_choices,
                    288:          },
1.110     albertel  289:      rmargin      => {
1.101     matthew   290: 	 default     => 'default',
                    291: 	 test        => sub {$_[0]=~/^(default|\d+)$/},
                    292: 	 description => 'Right margin width (pts):',
                    293: 	 edit_type   => 'choice',
                    294:          choices     => $margin_choices,
                    295:          },
1.110     albertel  296:      tmargin      => {
1.101     matthew   297: 	 default     => 'default',
                    298: 	 test        => sub {$_[0]=~/^(default|\d+)$/},
                    299: 	 description => 'Top margin width (pts):',
                    300: 	 edit_type   => 'choice',
                    301:          choices     => $margin_choices,
                    302:          },
1.110     albertel  303:      bmargin      => {
1.101     matthew   304: 	 default     => 'default',
                    305: 	 test        => sub {$_[0]=~/^(default|\d+)$/},
1.104     www       306: 	 description => 'Bottom margin width (pts):',
1.101     matthew   307: 	 edit_type   => 'choice',
                    308:          choices     => $margin_choices,
                    309:          },
1.110     albertel  310:      boxwidth     => {
                    311: 	 default     => '',
                    312: 	 test        => $real_test, 
                    313: 	 description => 'width of boxes default auto',
                    314: 	 edit_type   => 'entry',
                    315:          size        => '5'
                    316:          },
1.101     matthew   317:      major_ticscale  => {
                    318:          default     => '1',
                    319:          test        => $real_test,
                    320:          description => 'Size of major tic marks (plot coordinates)',
                    321:          edit_type   => 'entry',
                    322:          size        => '5'
                    323:          },
                    324:      minor_ticscale  => {
                    325:          default     => '0.5',
                    326:          test        => $real_test,
                    327:          description => 'Size of minor tic mark (plot coordinates)',
                    328:          edit_type   => 'entry',
                    329:          size        => '5'
                    330:          },
1.1       matthew   331:      );
                    332: 
                    333: my %key_defaults = 
                    334:     (
1.20      matthew   335:      title => { 
                    336: 	 default => '',
                    337: 	 test => $words_test,
                    338: 	 description => 'Title of key',
1.38      matthew   339: 	 edit_type   => 'entry',
                    340: 	 size        => '40'
1.20      matthew   341: 	 },
                    342:      box   => { 
                    343: 	 default => 'off',
                    344: 	 test => $onoff_test,
                    345: 	 description => 'Draw a box around the key?',
1.45      matthew   346: 	 edit_type   => 'onoff'
1.20      matthew   347: 	 },
                    348:      pos   => { 
                    349: 	 default => 'top right', 
                    350: 	 test => $key_pos_test, 
                    351: 	 description => 'position of the key on the plot',
                    352: 	 edit_type   => 'choice',
                    353: 	 choices     => ['top left','top right','bottom left','bottom right',
                    354: 			 'outside','below']
                    355: 	 }
1.1       matthew   356:      );
                    357: 
                    358: my %label_defaults = 
                    359:     (
1.20      matthew   360:      xpos    => {
                    361: 	 default => 0,
                    362: 	 test => $real_test,
                    363: 	 description => 'x position of label (graph coordinates)',
1.38      matthew   364: 	 edit_type   => 'entry',
                    365: 	 size        => '10'
1.20      matthew   366: 	 },
                    367:      ypos    => {
                    368: 	 default => 0, 
                    369: 	 test => $real_test,
                    370: 	 description => 'y position of label (graph coordinates)',
1.38      matthew   371: 	 edit_type   => 'entry',
                    372: 	 size        => '10'
1.20      matthew   373: 	 },
                    374:      justify => {
                    375: 	 default => 'left',    
                    376: 	 test => sub {$_[0]=~/^(left|right|center)$/},
                    377: 	 description => 'justification of the label text on the plot',
                    378: 	 edit_type   => 'choice',
                    379: 	 choices     => ['left','right','center']
                    380:      }
1.1       matthew   381:      );
                    382: 
1.89      matthew   383: my @tic_edit_order = ('location','mirror','start','increment','end',
                    384:                       'minorfreq');
1.45      matthew   385: my %tic_defaults =
                    386:     (
                    387:      location => {
                    388: 	 default => 'border', 
                    389: 	 test => sub {$_[0]=~/^(border|axis)$/},
1.90      matthew   390: 	 description => 'Location of major tic marks',
1.45      matthew   391: 	 edit_type   => 'choice',
                    392: 	 choices     => ['border','axis']
                    393: 	 },
                    394:      mirror => {
                    395: 	 default => 'on', 
                    396: 	 test => $onoff_test,
1.90      matthew   397: 	 description => 'mirror tics on opposite axis?',
1.45      matthew   398: 	 edit_type   => 'onoff'
                    399: 	 },
                    400:      start => {
                    401: 	 default => '-10.0',
                    402: 	 test => $real_test,
1.90      matthew   403: 	 description => 'Start major tics at',
1.45      matthew   404: 	 edit_type   => 'entry',
                    405: 	 size        => '10'
                    406: 	 },
                    407:      increment => {
                    408: 	 default => '1.0',
                    409: 	 test => $real_test,
1.90      matthew   410: 	 description => 'Place a major tic every',
1.45      matthew   411: 	 edit_type   => 'entry',
                    412: 	 size        => '10'
                    413: 	 },
                    414:      end => {
                    415: 	 default => ' 10.0',
                    416: 	 test => $real_test,
1.90      matthew   417: 	 description => 'Stop major tics at ',
1.45      matthew   418: 	 edit_type   => 'entry',
                    419: 	 size        => '10'
                    420: 	 },
1.89      matthew   421:      minorfreq => {
                    422: 	 default => '0',
                    423: 	 test => $int_test,
1.98      matthew   424: 	 description => 'Number of minor tics per major tic mark',
1.89      matthew   425: 	 edit_type   => 'entry',
                    426: 	 size        => '10'
                    427: 	 },         
1.45      matthew   428:      );
                    429: 
1.65      matthew   430: my @axis_edit_order = ('color','xmin','xmax','ymin','ymax');
1.1       matthew   431: my %axis_defaults = 
                    432:     (
1.28      matthew   433:      color   => {
1.20      matthew   434: 	 default => 'x000000', 
                    435: 	 test => $color_test,
1.78      matthew   436: 	 description => 'color of grid lines (x000000)',
1.38      matthew   437: 	 edit_type   => 'entry',
                    438: 	 size        => '10'
1.20      matthew   439: 	 },
                    440:      xmin      => {
                    441: 	 default => '-10.0',
                    442: 	 test => $real_test,
                    443: 	 description => 'minimum x-value shown in plot',
1.38      matthew   444: 	 edit_type   => 'entry',
                    445: 	 size        => '10'
1.20      matthew   446: 	 },
                    447:      xmax      => {
                    448: 	 default => ' 10.0',
                    449: 	 test => $real_test,
                    450: 	 description => 'maximum x-value shown in plot',	 
1.38      matthew   451: 	 edit_type   => 'entry',
                    452: 	 size        => '10'
1.20      matthew   453: 	 },
                    454:      ymin      => {
                    455: 	 default => '-10.0',
                    456: 	 test => $real_test,
                    457: 	 description => 'minimum y-value shown in plot',	 
1.38      matthew   458: 	 edit_type   => 'entry',
                    459: 	 size        => '10'
1.20      matthew   460: 	 },
                    461:      ymax      => {
                    462: 	 default => ' 10.0',
                    463: 	 test => $real_test,
                    464: 	 description => 'maximum y-value shown in plot',	 
1.38      matthew   465: 	 edit_type   => 'entry',
                    466: 	 size        => '10'
1.20      matthew   467: 	 }
1.1       matthew   468:      );
                    469: 
1.110     albertel  470: my @curve_edit_order = ('color','name','linestyle','pointtype','pointsize','limit');
1.60      matthew   471: 
1.1       matthew   472: my %curve_defaults = 
                    473:     (
1.20      matthew   474:      color     => {
                    475: 	 default => 'x000000',
                    476: 	 test => $color_test,
                    477: 	 description => 'color of curve (x000000)',
1.38      matthew   478: 	 edit_type   => 'entry',
                    479: 	 size        => '10'
1.20      matthew   480: 	 },
                    481:      name      => {
                    482: 	 default => '',
                    483: 	 test => $words_test,
                    484: 	 description => 'name of curve to appear in key',
1.38      matthew   485: 	 edit_type   => 'entry',
                    486: 	 size        => '20'
1.20      matthew   487: 	 },
                    488:      linestyle => {
                    489: 	 default => 'lines',
                    490: 	 test => $linestyle_test,
1.35      matthew   491: 	 description => 'Line style',
1.20      matthew   492: 	 edit_type   => 'choice',
1.38      matthew   493: 	 choices     => [keys(%linestyles)]
1.60      matthew   494: 	 },
                    495: # gnuplots term=gif driver does not handle linewidth :(
                    496: #     linewidth => {
                    497: #         default     => 1,
                    498: #         test        => $int_test,
                    499: #         description => 'Line width (may not apply to all line styles)',
                    500: #         edit_type   => 'choice',
                    501: #         choices     => [1,2,3,4,5,6,7,8,9,10]
                    502: #         },
                    503:      pointsize => {
                    504:          default     => 1,
1.62      matthew   505:          test        => $pos_real_test,
                    506:          description => 'point size (may not apply to all line styles)',
                    507:          edit_type   => 'entry',
                    508:          size        => '5'
                    509:          },
                    510:      pointtype => {
                    511:          default     => 1,
1.60      matthew   512:          test        => $int_test,
1.62      matthew   513:          description => 'point type (may not apply to all line styles)',
1.60      matthew   514:          edit_type   => 'choice',
1.62      matthew   515:          choices     => [0,1,2,3,4,5,6]
1.110     albertel  516:          },
                    517:      limit     => {
                    518:          default     => 'closed',
                    519: 	 test        => sub {$_[0]=~/^(closed|x1|x2|y1|y2)$/},
                    520:          description => 'point to fill -- for filledcurves',
                    521:          edit_type   => 'choice',
                    522:          choices     => ['closed','x1','x2','y1','y2']
                    523:          },
1.1       matthew   524:      );
                    525: 
1.21      matthew   526: ###################################################################
                    527: ##                                                               ##
                    528: ##                    parsing and edit rendering                 ##
                    529: ##                                                               ##
                    530: ###################################################################
1.107     foxr      531: 
                    532: undef %Apache::lonplot::plot;
                    533: my (%key,%axis,$title,$xlabel,$ylabel,@labels,@curves,%xtics,%ytics);
1.1       matthew   534: 
1.47      matthew   535: sub start_gnuplot {
1.107     foxr      536:     undef(%Apache::lonplot::plot);   undef(%key);    undef(%axis);
1.89      matthew   537:     undef($title);  undef($xlabel); undef($ylabel);
                    538:     undef(@labels); undef(@curves);
                    539:     undef(%xtics);  undef(%ytics);
1.6       matthew   540:     #
1.1       matthew   541:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    542:     my $result='';
1.25      matthew   543:     &Apache::lonxml::register('Apache::lonplot',
1.45      matthew   544: 	     ('title','xlabel','ylabel','key','axis','label','curve',
                    545: 	      'xtics','ytics'));
1.29      matthew   546:     push (@Apache::lonxml::namespace,'lonplot');
1.51      matthew   547:     if ($target eq 'web' || $target eq 'tex') {
1.107     foxr      548: 	&get_attributes(\%Apache::lonplot::plot,\%gnuplot_defaults,$parstack,$safeeval,
1.17      matthew   549: 			$tagstack->[-1]);
1.20      matthew   550:     } elsif ($target eq 'edit') {
1.47      matthew   551: 	$result .= &Apache::edit::tag_start($target,$token,'GnuPlot');
                    552: 	$result .= &edit_attributes($target,$token,\%gnuplot_defaults,
1.116     albertel  553: 				    \@gnuplot_edit_order)
                    554: 	    .&Apache::edit::end_row()
                    555: 	    .&Apache::edit::start_spanning_row();
1.20      matthew   556:     } elsif ($target eq 'modified') {
                    557: 	my $constructtag=&Apache::edit::get_new_args
1.47      matthew   558: 	    ($token,$parstack,$safeeval,keys(%gnuplot_defaults));
1.20      matthew   559: 	if ($constructtag) {
                    560: 	    $result = &Apache::edit::rebuild_tag($token);
                    561: 	}
1.4       matthew   562:     }
1.21      matthew   563:     return $result;
1.1       matthew   564: }
                    565: 
1.47      matthew   566: sub end_gnuplot {
1.1       matthew   567:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    568:     pop @Apache::lonxml::namespace;
1.4       matthew   569:     &Apache::lonxml::deregister('Apache::lonplot',
                    570: 	('title','xlabel','ylabel','key','axis','label','curve'));
                    571:     my $result = '';
1.56      albertel  572:     my $randnumber;
                    573:     # need to call rand everytime start_script would evaluate, as the
                    574:     # safe space rand number generator and the global rand generator 
1.95      www       575:     # are not separate
1.56      albertel  576:     if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
                    577: 	$target eq 'answer') {
                    578:       $randnumber=int(rand(1000));
                    579:     }
1.51      matthew   580:     if ($target eq 'web' || $target eq 'tex') {
1.21      matthew   581: 	&check_inputs(); # Make sure we have all the data we need
1.13      matthew   582: 	##
                    583: 	## Determine filename
1.4       matthew   584: 	my $tmpdir = '/home/httpd/perl/tmp/';
1.106     albertel  585: 	my $filename = $env{'user.name'}.'_'.$env{'user.domain'}.
1.69      matthew   586: 	    '_'.time.'_'.$$.$randnumber.'_plot';
1.4       matthew   587: 	## Write the plot description to the file
1.51      matthew   588: 	&write_gnuplot_file($tmpdir,$filename,$target);
1.113     www       589: 	$filename = &escape($filename);
1.4       matthew   590: 	## return image tag for the plot
1.51      matthew   591: 	if ($target eq 'web') {
                    592: 	    $result .= <<"ENDIMAGE";
1.114     albertel  593: <img src    = "/cgi-bin/plot.$weboutputformat?file=$filename.data" 
1.107     foxr      594:      width  = "$Apache::lonplot::plot{'width'}"
                    595:      height = "$Apache::lonplot::plot{'height'}"
                    596:      align  = "$Apache::lonplot::plot{'align'}"
                    597:      alt    = "$Apache::lonplot::plot{'alttag'}" />
1.12      matthew   598: ENDIMAGE
1.51      matthew   599:         } elsif ($target eq 'tex') {
1.107     foxr      600: 	    &Apache::lonxml::debug(" gnuplot wid = $Apache::lonplot::plot{'width'}");
                    601: 	    &Apache::lonxml::debug(" gnuplot ht  = $Apache::lonplot::plot{'height'}");
1.91      albertel  602: 	    #might be inside the safe space, register the URL for later
                    603: 	    &Apache::lonxml::register_ssi("/cgi-bin/plot.gif?file=$filename.data&output=eps");
1.111     albertel  604: 	    $result  = "%DYNAMICIMAGE:$Apache::lonplot::plot{'width'}:$Apache::lonplot::plot{'height'}:$Apache::lonplot::plot{'texwidth'}\n";
1.109     foxr      605: 	    $result .= '\graphicspath{{/home/httpd/perl/tmp/}}'."\n";
1.113     www       606: 	    $result .= '\includegraphics[width='.$Apache::lonplot::plot{'texwidth'}.' mm]{'.&unescape($filename).'.eps}';
1.51      matthew   607: 	}
1.20      matthew   608:     } elsif ($target eq 'edit') {
1.21      matthew   609: 	$result.=&Apache::edit::tag_end($target,$token);
1.4       matthew   610:     }
1.1       matthew   611:     return $result;
                    612: }
1.2       matthew   613: 
1.45      matthew   614: 
                    615: ##--------------------------------------------------------------- xtics
                    616: sub start_xtics {
                    617:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    618:     my $result='';
1.51      matthew   619:     if ($target eq 'web' || $target eq 'tex') {
1.45      matthew   620: 	&get_attributes(\%xtics,\%tic_defaults,$parstack,$safeeval,
                    621: 		    $tagstack->[-1]);
                    622:     } elsif ($target eq 'edit') {
                    623: 	$result .= &Apache::edit::tag_start($target,$token,'xtics');
                    624: 	$result .= &edit_attributes($target,$token,\%tic_defaults,
                    625: 				    \@tic_edit_order);
                    626:     } elsif ($target eq 'modified') {
                    627: 	my $constructtag=&Apache::edit::get_new_args
                    628: 	    ($token,$parstack,$safeeval,keys(%tic_defaults));
                    629: 	if ($constructtag) {
                    630: 	    $result = &Apache::edit::rebuild_tag($token);
                    631: 	}
                    632:     }
                    633:     return $result;
                    634: }
                    635: 
                    636: sub end_xtics {
                    637:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    638:     my $result = '';
1.51      matthew   639:     if ($target eq 'web' || $target eq 'tex') {
1.45      matthew   640:     } elsif ($target eq 'edit') {
                    641: 	$result.=&Apache::edit::tag_end($target,$token);
                    642:     }
                    643:     return $result;
                    644: }
                    645: 
                    646: ##--------------------------------------------------------------- ytics
                    647: sub start_ytics {
                    648:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    649:     my $result='';
1.51      matthew   650:     if ($target eq 'web' || $target eq 'tex') {
1.45      matthew   651: 	&get_attributes(\%ytics,\%tic_defaults,$parstack,$safeeval,
                    652: 		    $tagstack->[-1]);
                    653:     } elsif ($target eq 'edit') {
                    654: 	$result .= &Apache::edit::tag_start($target,$token,'ytics');
                    655: 	$result .= &edit_attributes($target,$token,\%tic_defaults,
                    656: 				    \@tic_edit_order);
                    657:     } elsif ($target eq 'modified') {
                    658: 	my $constructtag=&Apache::edit::get_new_args
                    659: 	    ($token,$parstack,$safeeval,keys(%tic_defaults));
                    660: 	if ($constructtag) {
                    661: 	    $result = &Apache::edit::rebuild_tag($token);
                    662: 	}
                    663:     }
                    664:     return $result;
                    665: }
                    666: 
                    667: sub end_ytics {
                    668:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    669:     my $result = '';
1.51      matthew   670:     if ($target eq 'web' || $target eq 'tex') {
1.45      matthew   671:     } elsif ($target eq 'edit') {
                    672: 	$result.=&Apache::edit::tag_end($target,$token);
                    673:     }
                    674:     return $result;
                    675: }
                    676: 
                    677: 
1.1       matthew   678: ##----------------------------------------------------------------- key
                    679: sub start_key {
                    680:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    681:     my $result='';
1.51      matthew   682:     if ($target eq 'web' || $target eq 'tex') {
1.17      matthew   683: 	&get_attributes(\%key,\%key_defaults,$parstack,$safeeval,
1.11      matthew   684: 		    $tagstack->[-1]);
1.20      matthew   685:     } elsif ($target eq 'edit') {
1.25      matthew   686: 	$result .= &Apache::edit::tag_start($target,$token,'Plot Key');
1.21      matthew   687: 	$result .= &edit_attributes($target,$token,\%key_defaults);
1.20      matthew   688:     } elsif ($target eq 'modified') {
                    689: 	my $constructtag=&Apache::edit::get_new_args
1.24      matthew   690: 	    ($token,$parstack,$safeeval,keys(%key_defaults));
1.20      matthew   691: 	if ($constructtag) {
                    692: 	    $result = &Apache::edit::rebuild_tag($token);
                    693: 	}
1.4       matthew   694:     }
1.1       matthew   695:     return $result;
                    696: }
                    697: 
                    698: sub end_key {
                    699:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    700:     my $result = '';
1.51      matthew   701:     if ($target eq 'web' || $target eq 'tex') {
1.20      matthew   702:     } elsif ($target eq 'edit') {
1.21      matthew   703: 	$result.=&Apache::edit::tag_end($target,$token);
1.4       matthew   704:     }
1.1       matthew   705:     return $result;
                    706: }
1.21      matthew   707: 
1.1       matthew   708: ##------------------------------------------------------------------- title
                    709: sub start_title {
                    710:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    711:     my $result='';
1.51      matthew   712:     if ($target eq 'web' || $target eq 'tex') {
1.112     albertel  713: 	$title = &Apache::lonxml::get_all_text("/title",$parser,$style);
1.58      matthew   714: 	$title=&Apache::run::evaluate($title,$safeeval,$$parstack[-1]);
1.49      matthew   715: 	$title =~ s/\n/ /g;
1.32      matthew   716: 	if (length($title) > $max_str_len) {
                    717: 	    $title = substr($title,0,$max_str_len);
                    718: 	}
1.20      matthew   719:     } elsif ($target eq 'edit') {
1.25      matthew   720: 	$result.=&Apache::edit::tag_start($target,$token,'Plot Title');
1.112     albertel  721: 	my $text=&Apache::lonxml::get_all_text("/title",$parser,$style);
1.116     albertel  722: 	$result.=&Apache::edit::editline('',$text,'',60);
1.20      matthew   723:     } elsif ($target eq 'modified') {
1.42      matthew   724: 	$result.=&Apache::edit::rebuild_tag($token);
1.93      albertel  725: 	$result.=&Apache::edit::modifiedfield("/title",$parser);
1.4       matthew   726:     }
1.1       matthew   727:     return $result;
                    728: }
                    729: 
                    730: sub end_title {
                    731:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    732:     my $result = '';
1.51      matthew   733:     if ($target eq 'web' || $target eq 'tex') {
1.20      matthew   734:     } elsif ($target eq 'edit') {
1.27      matthew   735: 	$result.=&Apache::edit::tag_end($target,$token);
1.4       matthew   736:     }
1.1       matthew   737:     return $result;
                    738: }
                    739: ##------------------------------------------------------------------- xlabel
                    740: sub start_xlabel {
                    741:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    742:     my $result='';
1.51      matthew   743:     if ($target eq 'web' || $target eq 'tex') {
1.112     albertel  744: 	$xlabel = &Apache::lonxml::get_all_text("/xlabel",$parser,$style);
1.58      matthew   745: 	$xlabel=&Apache::run::evaluate($xlabel,$safeeval,$$parstack[-1]);
1.49      matthew   746: 	$xlabel =~ s/\n/ /g;
1.32      matthew   747: 	if (length($xlabel) > $max_str_len) {
                    748: 	    $xlabel = substr($xlabel,0,$max_str_len);
                    749: 	}
1.20      matthew   750:     } elsif ($target eq 'edit') {
1.25      matthew   751: 	$result.=&Apache::edit::tag_start($target,$token,'Plot Xlabel');
1.112     albertel  752: 	my $text=&Apache::lonxml::get_all_text("/xlabel",$parser,$style);
1.116     albertel  753: 	$result.=&Apache::edit::editline('',$text,'',60);
1.20      matthew   754:     } elsif ($target eq 'modified') {
1.42      matthew   755: 	$result.=&Apache::edit::rebuild_tag($token);	
1.93      albertel  756: 	$result.=&Apache::edit::modifiedfield("/xlabel",$parser);
1.4       matthew   757:     }
1.1       matthew   758:     return $result;
                    759: }
                    760: 
                    761: sub end_xlabel {
                    762:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    763:     my $result = '';
1.51      matthew   764:     if ($target eq 'web' || $target eq 'tex') {
1.20      matthew   765:     } elsif ($target eq 'edit') {
1.27      matthew   766: 	$result.=&Apache::edit::tag_end($target,$token);
1.4       matthew   767:     }
1.1       matthew   768:     return $result;
                    769: }
1.21      matthew   770: 
1.1       matthew   771: ##------------------------------------------------------------------- ylabel
                    772: sub start_ylabel {
                    773:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    774:     my $result='';
1.51      matthew   775:     if ($target eq 'web' || $target eq 'tex') {
1.112     albertel  776: 	$ylabel = &Apache::lonxml::get_all_text("/ylabel",$parser,$style);
1.58      matthew   777: 	$ylabel = &Apache::run::evaluate($ylabel,$safeeval,$$parstack[-1]);
1.49      matthew   778: 	$ylabel =~ s/\n/ /g;
1.32      matthew   779: 	if (length($ylabel) > $max_str_len) {
                    780: 	    $ylabel = substr($ylabel,0,$max_str_len);
                    781: 	}
1.20      matthew   782:     } elsif ($target eq 'edit') {
1.25      matthew   783: 	$result .= &Apache::edit::tag_start($target,$token,'Plot Ylabel');
1.112     albertel  784: 	my $text = &Apache::lonxml::get_all_text("/ylabel",$parser,$style);
1.116     albertel  785: 	$result .= &Apache::edit::editline('',$text,'',60);
1.20      matthew   786:     } elsif ($target eq 'modified') {
1.42      matthew   787: 	$result.=&Apache::edit::rebuild_tag($token);
1.93      albertel  788: 	$result.=&Apache::edit::modifiedfield("/ylabel",$parser);
1.4       matthew   789:     }
1.1       matthew   790:     return $result;
                    791: }
                    792: 
                    793: sub end_ylabel {
                    794:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    795:     my $result = '';
1.51      matthew   796:     if ($target eq 'web' || $target eq 'tex') {
1.20      matthew   797:     } elsif ($target eq 'edit') {
1.27      matthew   798: 	$result.=&Apache::edit::tag_end($target,$token);
1.4       matthew   799:     }
1.1       matthew   800:     return $result;
                    801: }
1.21      matthew   802: 
1.1       matthew   803: ##------------------------------------------------------------------- label
                    804: sub start_label {
                    805:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    806:     my $result='';
1.51      matthew   807:     if ($target eq 'web' || $target eq 'tex') {
1.17      matthew   808: 	my %label;
                    809: 	&get_attributes(\%label,\%label_defaults,$parstack,$safeeval,
1.11      matthew   810: 		    $tagstack->[-1]);
1.112     albertel  811: 	my $text = &Apache::lonxml::get_all_text("/label",$parser,$style);
1.58      matthew   812: 	$text = &Apache::run::evaluate($text,$safeeval,$$parstack[-1]);
1.49      matthew   813: 	$text =~ s/\n/ /g;
1.32      matthew   814: 	$text = substr($text,0,$max_str_len) if (length($text) > $max_str_len);
                    815: 	$label{'text'} = $text;
1.17      matthew   816: 	push(@labels,\%label);
1.20      matthew   817:     } elsif ($target eq 'edit') {
1.25      matthew   818: 	$result .= &Apache::edit::tag_start($target,$token,'Plot Label');
1.21      matthew   819: 	$result .= &edit_attributes($target,$token,\%label_defaults);
1.112     albertel  820: 	my $text = &Apache::lonxml::get_all_text("/label",$parser,$style);
1.39      matthew   821: 	$result .= &Apache::edit::end_row().
                    822: 	    &Apache::edit::start_spanning_row().
1.63      albertel  823: 	    &Apache::edit::editline('',$text,'',60);
1.20      matthew   824:     } elsif ($target eq 'modified') {
1.42      matthew   825: 	&Apache::edit::get_new_args
1.24      matthew   826: 	    ($token,$parstack,$safeeval,keys(%label_defaults));
1.42      matthew   827: 	$result.=&Apache::edit::rebuild_tag($token);
1.93      albertel  828: 	$result.=&Apache::edit::modifiedfield("/label",$parser);
1.4       matthew   829:     }
1.1       matthew   830:     return $result;
                    831: }
                    832: 
                    833: sub end_label {
                    834:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    835:     my $result = '';
1.51      matthew   836:     if ($target eq 'web' || $target eq 'tex') {
1.20      matthew   837:     } elsif ($target eq 'edit') {
1.21      matthew   838: 	$result.=&Apache::edit::tag_end($target,$token);
1.4       matthew   839:     }
1.1       matthew   840:     return $result;
                    841: }
                    842: 
                    843: ##------------------------------------------------------------------- curve
                    844: sub start_curve {
                    845:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    846:     my $result='';
1.25      matthew   847:     &Apache::lonxml::register('Apache::lonplot',('function','data'));
                    848:     push (@Apache::lonxml::namespace,'curve');
1.51      matthew   849:     if ($target eq 'web' || $target eq 'tex') {
1.17      matthew   850: 	my %curve;
                    851: 	&get_attributes(\%curve,\%curve_defaults,$parstack,$safeeval,
1.11      matthew   852: 		    $tagstack->[-1]);
1.17      matthew   853: 	push (@curves,\%curve);
1.20      matthew   854:     } elsif ($target eq 'edit') {
1.26      matthew   855: 	$result .= &Apache::edit::tag_start($target,$token,'Curve');
1.60      matthew   856: 	$result .= &edit_attributes($target,$token,\%curve_defaults,
1.116     albertel  857:                                     \@curve_edit_order)
                    858: 	    .&Apache::edit::end_row()
                    859: 	    .&Apache::edit::start_spanning_row();
                    860: 
1.20      matthew   861:     } elsif ($target eq 'modified') {
                    862: 	my $constructtag=&Apache::edit::get_new_args
1.35      matthew   863: 	    ($token,$parstack,$safeeval,keys(%curve_defaults));
1.20      matthew   864: 	if ($constructtag) {
                    865: 	    $result = &Apache::edit::rebuild_tag($token);
                    866: 	}
1.4       matthew   867:     }
1.1       matthew   868:     return $result;
                    869: }
                    870: 
                    871: sub end_curve {
                    872:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    873:     my $result = '';
1.25      matthew   874:     pop @Apache::lonxml::namespace;
                    875:     &Apache::lonxml::deregister('Apache::lonplot',('function','data'));
1.51      matthew   876:     if ($target eq 'web' || $target eq 'tex') {
1.20      matthew   877:     } elsif ($target eq 'edit') {
1.21      matthew   878: 	$result.=&Apache::edit::tag_end($target,$token);
1.4       matthew   879:     }
1.1       matthew   880:     return $result;
                    881: }
1.21      matthew   882: 
1.1       matthew   883: ##------------------------------------------------------------ curve function
                    884: sub start_function {
                    885:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    886:     my $result='';
1.51      matthew   887:     if ($target eq 'web' || $target eq 'tex') {
1.17      matthew   888: 	if (exists($curves[-1]->{'data'})) {
1.85      matthew   889: 	    &Apache::lonxml::warning
                    890:                 ('Use of the <b>curve function</b> tag precludes use of '.
                    891:                  ' the <b>curve data</b> tag.  '.
                    892:                  'The curve data tag will be omitted in favor of the '.
                    893:                  'curve function declaration.');
1.17      matthew   894: 	    delete $curves[-1]->{'data'} ;
                    895: 	}
1.112     albertel  896:         my $function = &Apache::lonxml::get_all_text("/function",$parser,
                    897: 						     $style);
1.58      matthew   898: 	$function = &Apache::run::evaluate($function,$safeeval,$$parstack[-1]);
                    899: 	$curves[-1]->{'function'} = $function; 
1.20      matthew   900:     } elsif ($target eq 'edit') {
1.37      matthew   901: 	$result .= &Apache::edit::tag_start($target,$token,'Gnuplot compatible curve function');
1.112     albertel  902: 	my $text = &Apache::lonxml::get_all_text("/function",$parser,$style);
1.116     albertel  903: 	$result .= &Apache::edit::editline('',$text,'',60);
1.20      matthew   904:     } elsif ($target eq 'modified') {
1.42      matthew   905: 	$result.=&Apache::edit::rebuild_tag($token);
1.93      albertel  906: 	$result.=&Apache::edit::modifiedfield("/function",$parser);
1.4       matthew   907:     }
1.1       matthew   908:     return $result;
                    909: }
                    910: 
                    911: sub end_function {
                    912:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    913:     my $result = '';
1.51      matthew   914:     if ($target eq 'web' || $target eq 'tex') {
1.20      matthew   915:     } elsif ($target eq 'edit') {
1.26      matthew   916: 	$result .= &Apache::edit::end_table();
1.4       matthew   917:     }
1.1       matthew   918:     return $result;
                    919: }
1.21      matthew   920: 
1.1       matthew   921: ##------------------------------------------------------------ curve  data
                    922: sub start_data {
                    923:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    924:     my $result='';
1.51      matthew   925:     if ($target eq 'web' || $target eq 'tex') {
1.17      matthew   926: 	if (exists($curves[-1]->{'function'})) {
1.85      matthew   927: 	    &Apache::lonxml::warning
                    928:                 ('Use of the <b>curve function</b> tag precludes use of '.
                    929:                  ' the <b>curve data</b> tag.  '.
                    930:                  'The curve function tag will be omitted in favor of the '.
                    931:                  'curve data declaration.');
1.17      matthew   932: 	    delete($curves[-1]->{'function'});
                    933: 	}
1.112     albertel  934: 	my $datatext = &Apache::lonxml::get_all_text("/data",$parser,$style);
1.58      matthew   935: 	$datatext=&Apache::run::evaluate($datatext,$safeeval,$$parstack[-1]);
1.40      matthew   936: 	# Deal with cases where we're given an array...
                    937: 	if ($datatext =~ /^\@/) {
                    938: 	    $datatext = &Apache::run::run('return "'.$datatext.'"',
                    939: 					  $safeeval,1);
                    940: 	}
1.49      matthew   941: 	$datatext =~ s/\s+/ /g;
1.17      matthew   942: 	# Need to do some error checking on the @data array - 
                    943: 	# make sure it's all numbers and make sure each array 
                    944: 	# is of the same length.
                    945: 	my @data;
1.35      matthew   946: 	if ($datatext =~ /,/) { # comma deliminated
1.17      matthew   947: 	    @data = split /,/,$datatext;
1.95      www       948: 	} else { # Assume it's space separated.
1.17      matthew   949: 	    @data = split / /,$datatext;
                    950: 	}
                    951: 	for (my $i=0;$i<=$#data;$i++) {
                    952: 	    # Check that it's non-empty
1.19      matthew   953: 	    if (! defined($data[$i])) {
                    954: 		&Apache::lonxml::warning(
1.85      matthew   955: 		    'undefined curve data value.  Replacing with '.
1.19      matthew   956: 		    ' pi/e = 1.15572734979092');
                    957: 		$data[$i] = 1.15572734979092;
                    958: 	    }
1.17      matthew   959: 	    # Check that it's a number
1.19      matthew   960: 	    if (! &$real_test($data[$i]) & ! &$int_test($data[$i])) {
                    961: 		&Apache::lonxml::warning(
1.85      matthew   962: 		    'Bad curve data value of '.$data[$i].'  Replacing with '.
1.19      matthew   963: 		    ' pi/e = 1.15572734979092');
                    964: 		$data[$i] = 1.15572734979092;
                    965: 	    }
1.17      matthew   966: 	}
1.35      matthew   967: 	# complain if the number of data points is not the same as
                    968: 	# in previous sets of data.
1.36      matthew   969: 	if (($curves[-1]->{'data'}) && ($#data != $#{@{$curves[-1]->{'data'}->[0]}})){
1.35      matthew   970: 	    &Apache::lonxml::warning
                    971: 		('Number of data points is not consistent with previous '.
                    972: 		 'number of data points');
                    973: 	}
1.17      matthew   974: 	push  @{$curves[-1]->{'data'}},\@data;
1.20      matthew   975:     } elsif ($target eq 'edit') {
1.37      matthew   976: 	$result .= &Apache::edit::tag_start($target,$token,'Comma or space deliminated curve data');
1.112     albertel  977: 	my $text = &Apache::lonxml::get_all_text("/data",$parser,$style);
1.116     albertel  978: 	$result .= &Apache::edit::editline('',$text,'',60);
1.20      matthew   979:     } elsif ($target eq 'modified') {
1.42      matthew   980: 	$result.=&Apache::edit::rebuild_tag($token);
1.93      albertel  981: 	$result.=&Apache::edit::modifiedfield("/data",$parser);
1.4       matthew   982:     }
1.1       matthew   983:     return $result;
                    984: }
                    985: 
                    986: sub end_data {
                    987:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    988:     my $result = '';
1.51      matthew   989:     if ($target eq 'web' || $target eq 'tex') {
1.20      matthew   990:     } elsif ($target eq 'edit') {
1.26      matthew   991: 	$result .= &Apache::edit::end_table();
1.4       matthew   992:     }
1.1       matthew   993:     return $result;
                    994: }
                    995: 
                    996: ##------------------------------------------------------------------- axis
                    997: sub start_axis {
                    998:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    999:     my $result='';
1.51      matthew  1000:     if ($target eq 'web' || $target eq 'tex') {
1.17      matthew  1001: 	&get_attributes(\%axis,\%axis_defaults,$parstack,$safeeval,
                   1002: 			$tagstack->[-1]);
1.20      matthew  1003:     } elsif ($target eq 'edit') {
1.25      matthew  1004: 	$result .= &Apache::edit::tag_start($target,$token,'Plot Axes');
1.65      matthew  1005: 	$result .= &edit_attributes($target,$token,\%axis_defaults,
                   1006: 				    \@axis_edit_order);
1.20      matthew  1007:     } elsif ($target eq 'modified') {
1.29      matthew  1008: 	my $constructtag=&Apache::edit::get_new_args
                   1009: 	    ($token,$parstack,$safeeval,keys(%axis_defaults));
                   1010: 	if ($constructtag) {
                   1011: 	    $result = &Apache::edit::rebuild_tag($token);
                   1012: 	}
1.4       matthew  1013:     }
1.1       matthew  1014:     return $result;
                   1015: }
                   1016: 
                   1017: sub end_axis {
                   1018:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1019:     my $result = '';
1.51      matthew  1020:     if ($target eq 'web' || $target eq 'tex') {
1.20      matthew  1021:     } elsif ($target eq 'edit') {
1.21      matthew  1022: 	$result.=&Apache::edit::tag_end($target,$token);
1.20      matthew  1023:     } elsif ($target eq 'modified') {
1.4       matthew  1024:     }
1.1       matthew  1025:     return $result;
                   1026: }
                   1027: 
1.21      matthew  1028: ###################################################################
                   1029: ##                                                               ##
                   1030: ##        Utility Functions                                      ##
                   1031: ##                                                               ##
                   1032: ###################################################################
                   1033: 
1.13      matthew  1034: ##----------------------------------------------------------- set_defaults
                   1035: sub set_defaults {
1.21      matthew  1036:     my ($var,$defaults) = @_;
1.13      matthew  1037:     my $key;
1.24      matthew  1038:     foreach $key (keys(%$defaults)) {
1.13      matthew  1039: 	$var->{$key} = $defaults->{$key}->{'default'};
                   1040:     }
                   1041: }
                   1042: 
1.1       matthew  1043: ##------------------------------------------------------------------- misc
1.2       matthew  1044: sub get_attributes{
1.21      matthew  1045:     my ($values,$defaults,$parstack,$safeeval,$tag) = @_;
1.24      matthew  1046:     foreach my $attr (keys(%{$defaults})) {
1.92      matthew  1047: 	if ($attr eq 'texwidth' || $attr eq 'texfont') {
1.86      albertel 1048: 	    $values->{$attr} = 
                   1049: 		&Apache::lonxml::get_param($attr,$parstack,$safeeval,undef,1);
                   1050: 	} else {
                   1051: 	    $values->{$attr} = 
                   1052: 		&Apache::lonxml::get_param($attr,$parstack,$safeeval);
                   1053: 	}
1.10      matthew  1054: 	if ($values->{$attr} eq '' | !defined($values->{$attr})) {
1.11      matthew  1055: 	    $values->{$attr} = $defaults->{$attr}->{'default'};
1.6       matthew  1056: 	    next;
                   1057: 	}
1.10      matthew  1058: 	my $test = $defaults->{$attr}->{'test'};
                   1059: 	if (! &$test($values->{$attr})) {
1.6       matthew  1060: 	    &Apache::lonxml::warning
                   1061: 		($tag.':'.$attr.': Bad value.'.'Replacing your value with : '
1.11      matthew  1062: 		 .$defaults->{$attr}->{'default'} );
                   1063: 	    $values->{$attr} = $defaults->{$attr}->{'default'};
1.10      matthew  1064: 	}
1.2       matthew  1065:     }
1.11      matthew  1066:     return ;
1.6       matthew  1067: }
1.40      matthew  1068: 
1.15      matthew  1069: ##------------------------------------------------------- write_gnuplot_file
1.6       matthew  1070: sub write_gnuplot_file {
1.51      matthew  1071:     my ($tmpdir,$filename,$target)= @_;
1.6       matthew  1072:     my $gnuplot_input = '';
1.10      matthew  1073:     my $curve;
1.107     foxr     1074:     my $pt = $Apache::lonplot::plot{'texfont'};
1.100     matthew  1075:     #
                   1076:     # Check to be sure we do not have any empty curves
                   1077:     my @curvescopy;
                   1078:     foreach my $curve (@curves) {
                   1079:         if (exists($curve->{'function'})) {
                   1080:             if ($curve->{'function'} !~ /^\s*$/) {
                   1081:                 push(@curvescopy,$curve);
                   1082:             }
                   1083:         } elsif (exists($curve->{'data'})) {
                   1084:             foreach my $data (@{$curve->{'data'}}) {
                   1085:                 if (scalar(@$data) > 0) {
                   1086:                     push(@curvescopy,$curve);
                   1087:                     last;
                   1088:                 }
                   1089:             }
                   1090:         }
                   1091:     }
                   1092:     @curves = @curvescopy;
1.6       matthew  1093:     # Collect all the colors
                   1094:     my @Colors;
1.107     foxr     1095:     push @Colors, $Apache::lonplot::plot{'bgcolor'};
                   1096:     push @Colors, $Apache::lonplot::plot{'fgcolor'}; 
                   1097:     push @Colors, (defined($axis{'color'})?$axis{'color'}:$Apache::lonplot::plot{'fgcolor'});
1.9       matthew  1098:     foreach $curve (@curves) {
                   1099: 	push @Colors, ($curve->{'color'} ne '' ? 
                   1100: 		       $curve->{'color'}       : 
1.107     foxr     1101: 		       $Apache::lonplot::plot{'fgcolor'}        );
1.6       matthew  1102:     }
                   1103:     # set term
1.51      matthew  1104:     if ($target eq 'web') {
1.103     matthew  1105: 	$gnuplot_input .= 'set term '.$weboutputformat .' ';
1.107     foxr     1106: 	$gnuplot_input .= 'transparent ' if ($Apache::lonplot::plot{'transparent'} eq 'on');
                   1107: 	$gnuplot_input .= $Apache::lonplot::plot{'font'} . ' ';
                   1108: 	$gnuplot_input .= 'size '.$Apache::lonplot::plot{'width'}.','.$Apache::lonplot::plot{'height'}.' ';
1.51      matthew  1109: 	$gnuplot_input .= "@Colors\n";
                   1110: 	# set output
                   1111: 	$gnuplot_input .= "set output\n";
                   1112:     } elsif ($target eq 'tex') {
1.107     foxr     1113: 	$gnuplot_input .= "set term postscript eps $Apache::lonplot::plot{'plotcolor'} solid \"Helvetica\" $pt \n";
1.68      sakharuk 1114: 	$gnuplot_input .= "set output \"/home/httpd/perl/tmp/".
1.113     www      1115: 	    &unescape($filename).".eps\"\n";
1.87      matthew  1116:     }
1.115     albertel 1117:     # cartesian or polar plot?
1.107     foxr     1118:     if (lc($Apache::lonplot::plot{'plottype'}) eq 'polar') {
1.87      matthew  1119:         $gnuplot_input .= 'set polar'.$/;
                   1120:     } else {
                   1121:         # Assume Cartesian
1.51      matthew  1122:     }
1.115     albertel 1123:     # cartesian or polar grid?
                   1124:     if (lc($Apache::lonplot::plot{'gridtype'}) eq 'polar') {
                   1125:         $gnuplot_input .= 'set grid polar'.$/;
1.118   ! albertel 1126:     } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'linear-log') {
        !          1127:         $gnuplot_input .= 'set logscale x'.$/;
        !          1128:     } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'log-linear') {
        !          1129:         $gnuplot_input .= 'set logscale y'.$/;
        !          1130:     } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'log-log') {
        !          1131:         $gnuplot_input .= 'set logscale x'.$/;
        !          1132:         $gnuplot_input .= 'set logscale y'.$/;
1.115     albertel 1133:     } else {
                   1134:         # Assume Cartesian
                   1135:     }
1.110     albertel 1136:     # solid or pattern for boxes?
                   1137:     if (lc($Apache::lonplot::plot{'fillstyle'}) eq 'solid') {
                   1138:         $gnuplot_input .= 'set style fill solid '.
                   1139: 	    $Apache::lonplot::plot{'solid'}.$Apache::lonplot::plot{'box_border'}.$/;
                   1140:     } elsif (lc($Apache::lonplot::plot{'fillstyle'}) eq 'pattern') {
                   1141:         $gnuplot_input .= 'set style fill pattern '.$Apache::lonplot::plot{'pattern'}.$Apache::lonplot::plot{'box_border'}.$/;
                   1142:     } elsif (lc($Apache::lonplot::plot{'fillstyle'}) eq 'empty') {
                   1143:     }
1.101     matthew  1144:     # margin
1.107     foxr     1145:     if (lc($Apache::lonplot::plot{'lmargin'}) ne 'default') {
                   1146:         $gnuplot_input .= 'set lmargin '.$Apache::lonplot::plot{'lmargin'}.$/;
1.101     matthew  1147:     }
1.107     foxr     1148:     if (lc($Apache::lonplot::plot{'rmargin'}) ne 'default') {
                   1149:         $gnuplot_input .= 'set rmargin '.$Apache::lonplot::plot{'rmargin'}.$/;
1.101     matthew  1150:     }
1.107     foxr     1151:     if (lc($Apache::lonplot::plot{'tmargin'}) ne 'default') {
                   1152:         $gnuplot_input .= 'set tmargin '.$Apache::lonplot::plot{'tmargin'}.$/;
1.101     matthew  1153:     }
1.107     foxr     1154:     if (lc($Apache::lonplot::plot{'bmargin'}) ne 'default') {
                   1155:         $gnuplot_input .= 'set bmargin '.$Apache::lonplot::plot{'bmargin'}.$/;
1.101     matthew  1156:     }
                   1157:     # tic scales
                   1158:     $gnuplot_input .= 'set ticscale '.
1.107     foxr     1159:         $Apache::lonplot::plot{'major_ticscale'}.' '.$Apache::lonplot::plot{'minor_ticscale'}.$/;
1.110     albertel 1160:     #boxwidth
                   1161:     if (lc($Apache::lonplot::plot{'boxwidth'}) ne '') {
                   1162: 	$gnuplot_input .= 'set boxwidth '.$Apache::lonplot::plot{'boxwidth'}.$/;
                   1163:     }
                   1164:     # gridlayer
                   1165:     $gnuplot_input .= 'set grid noxtics noytics front '.$/ 
                   1166: 	if ($Apache::lonplot::plot{'gridlayer'} eq 'on');
                   1167: 
1.7       matthew  1168:     # grid
1.107     foxr     1169:     $gnuplot_input .= 'set grid'.$/ if ($Apache::lonplot::plot{'grid'} eq 'on');
1.7       matthew  1170:     # border
1.107     foxr     1171:     $gnuplot_input .= ($Apache::lonplot::plot{'border'} eq 'on'?
1.9       matthew  1172: 		       'set border'.$/           :
1.67      matthew  1173: 		       'set noborder'.$/         );
1.77      matthew  1174:     # sampling rate for non-data curves
1.107     foxr     1175:     $gnuplot_input .= "set samples $Apache::lonplot::plot{'samples'}\n";
1.67      matthew  1176:     # title, xlabel, ylabel
1.45      matthew  1177:     # titles
1.89      matthew  1178:     if ($target eq 'tex') {
1.92      matthew  1179:         $gnuplot_input .= "set title  \"$title\" font \"Helvetica,".$pt."pt\"\n"  if (defined($title)) ;
                   1180:         $gnuplot_input .= "set xlabel \"$xlabel\" font \"Helvetica,".$pt."pt\" \n" if (defined($xlabel));
                   1181:         $gnuplot_input .= "set ylabel \"$ylabel\" font \"Helvetica,".$pt."pt\"\n" if (defined($ylabel));
1.89      matthew  1182:     } else {
                   1183:         $gnuplot_input .= "set title  \"$title\"  \n"  if (defined($title)) ;
                   1184:         $gnuplot_input .= "set xlabel \"$xlabel\" \n" if (defined($xlabel));
                   1185:         $gnuplot_input .= "set ylabel \"$ylabel\" \n" if (defined($ylabel));
                   1186:     }
1.45      matthew  1187:     # tics
                   1188:     if (%xtics) {    
                   1189: 	$gnuplot_input .= "set xtics $xtics{'location'} ";
1.46      matthew  1190: 	$gnuplot_input .= ( $xtics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1.45      matthew  1191: 	$gnuplot_input .= "$xtics{'start'}, ";
                   1192: 	$gnuplot_input .= "$xtics{'increment'}, ";
                   1193: 	$gnuplot_input .= "$xtics{'end'}\n";
1.89      matthew  1194:         if ($xtics{'minorfreq'} != 0) {
                   1195:             $gnuplot_input .= "set mxtics ".$xtics{'minorfreq'}."\n";
                   1196:         } 
1.45      matthew  1197:     }
                   1198:     if (%ytics) {    
                   1199: 	$gnuplot_input .= "set ytics $ytics{'location'} ";
1.46      matthew  1200: 	$gnuplot_input .= ( $ytics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1.45      matthew  1201: 	$gnuplot_input .= "$ytics{'start'}, ";
                   1202: 	$gnuplot_input .= "$ytics{'increment'}, ";
                   1203:         $gnuplot_input .= "$ytics{'end'}\n";
1.89      matthew  1204:         if ($ytics{'minorfreq'} != 0) {
                   1205:             $gnuplot_input .= "set mytics ".$ytics{'minorfreq'}."\n";
                   1206:         } 
1.45      matthew  1207:     }
                   1208:     # axis
1.23      matthew  1209:     if (%axis) {
1.13      matthew  1210: 	$gnuplot_input .= "set xrange \[$axis{'xmin'}:$axis{'xmax'}\]\n";
                   1211: 	$gnuplot_input .= "set yrange \[$axis{'ymin'}:$axis{'ymax'}\]\n";
1.6       matthew  1212:     }
                   1213:     # Key
1.23      matthew  1214:     if (%key) {
1.9       matthew  1215: 	$gnuplot_input .= 'set key '.$key{'pos'}.' ';
                   1216: 	if ($key{'title'} ne '') {
1.67      matthew  1217: 	    $gnuplot_input .= 'title "'.$key{'title'}.'" ';
1.11      matthew  1218: 	} 
                   1219: 	$gnuplot_input .= ($key{'box'} eq 'on' ? 'box ' : 'nobox ').$/;
1.6       matthew  1220:     } else {
1.9       matthew  1221: 	$gnuplot_input .= 'set nokey'.$/;
1.13      matthew  1222:     }
1.6       matthew  1223:     # labels
1.10      matthew  1224:     my $label;
1.6       matthew  1225:     foreach $label (@labels) {
                   1226: 	$gnuplot_input .= 'set label "'.$label->{'text'}.'" at '.
1.103     matthew  1227: 	    $label->{'xpos'}.','.$label->{'ypos'}.' '.$label->{'justify'};
                   1228:         if ($target eq 'tex') {
                   1229:             $gnuplot_input .=' font "Helvetica,'.$pt.'pt"' ;
                   1230:         }
                   1231:         $gnuplot_input .= $/;
1.6       matthew  1232:     }
1.74      matthew  1233:     if ($target eq 'tex') {
1.107     foxr     1234:         $gnuplot_input .="set size 1,".$Apache::lonplot::plot{'height'}/$Apache::lonplot::plot{'width'}*1.38;
1.74      matthew  1235:         $gnuplot_input .="\n";
                   1236:         }
1.6       matthew  1237:     # curves
                   1238:     $gnuplot_input .= 'plot ';
1.9       matthew  1239:     for (my $i = 0;$i<=$#curves;$i++) {
                   1240: 	$curve = $curves[$i];
                   1241: 	$gnuplot_input.= ', ' if ($i > 0);
1.6       matthew  1242: 	if (exists($curve->{'function'})) {
1.9       matthew  1243: 	    $gnuplot_input.= 
                   1244: 		$curve->{'function'}.' title "'.
                   1245: 		$curve->{'name'}.'" with '.
1.72      matthew  1246:                 $curve->{'linestyle'};
1.73      sakharuk 1247:             $gnuplot_input.= ' linewidth 4 ' if ($target eq 'tex');
1.60      matthew  1248:             if (($curve->{'linestyle'} eq 'points')      ||
                   1249:                 ($curve->{'linestyle'} eq 'linespoints') ||
                   1250:                 ($curve->{'linestyle'} eq 'errorbars')   ||
                   1251:                 ($curve->{'linestyle'} eq 'xerrorbars')  ||
                   1252:                 ($curve->{'linestyle'} eq 'yerrorbars')  ||
                   1253:                 ($curve->{'linestyle'} eq 'xyerrorbars')) {
1.62      matthew  1254:                 $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
1.60      matthew  1255:                 $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1.110     albertel 1256:             } elsif ($curve->{'linestyle'} eq 'filledcurves') { 
                   1257:                 $gnuplot_input.= ' '.$curve->{'limit'};
1.60      matthew  1258:             }
1.6       matthew  1259: 	} elsif (exists($curve->{'data'})) {
1.40      matthew  1260: 	    # Store data values in $datatext
                   1261: 	    my $datatext = '';
                   1262: 	    #   get new filename
1.70      matthew  1263: 	    my $datafilename = "$tmpdir/$filename.data.$i";
1.40      matthew  1264: 	    my $fh=Apache::File->new(">$datafilename");
                   1265: 	    # Compile data
1.6       matthew  1266: 	    my @Data = @{$curve->{'data'}};
1.9       matthew  1267: 	    my @Data0 = @{$Data[0]};
                   1268: 	    for (my $i =0; $i<=$#Data0; $i++) {
1.10      matthew  1269: 		my $dataset;
1.6       matthew  1270: 		foreach $dataset (@Data) {
1.9       matthew  1271: 		    $datatext .= $dataset->[$i] . ' ';
1.6       matthew  1272: 		}
1.9       matthew  1273: 		$datatext .= $/;
1.6       matthew  1274: 	    }
1.40      matthew  1275: 	    #   write file
                   1276: 	    print $fh $datatext;
                   1277: 	    close ($fh);
                   1278: 	    #   generate gnuplot text
                   1279: 	    $gnuplot_input.= '"'.$datafilename.'" title "'.
                   1280: 		$curve->{'name'}.'" with '.
                   1281: 		$curve->{'linestyle'};
1.73      sakharuk 1282:             $gnuplot_input.= ' linewidth 4 ' if ($target eq 'tex');
1.62      matthew  1283:             if (($curve->{'linestyle'} eq 'points')      ||
                   1284:                 ($curve->{'linestyle'} eq 'linespoints') ||
                   1285:                 ($curve->{'linestyle'} eq 'errorbars')   ||
                   1286:                 ($curve->{'linestyle'} eq 'xerrorbars')  ||
                   1287:                 ($curve->{'linestyle'} eq 'yerrorbars')  ||
                   1288:                 ($curve->{'linestyle'} eq 'xyerrorbars')) {
                   1289:                 $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
                   1290:                 $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1.110     albertel 1291:             } elsif ($curve->{'linestyle'} eq 'filledcurves') { 
                   1292:                 $gnuplot_input.= ' '.$curve->{'limit'};
1.62      matthew  1293:             }
1.6       matthew  1294: 	}
                   1295:     }
1.40      matthew  1296:     # Write the output to a file.
1.70      matthew  1297:     my $fh=Apache::File->new(">$tmpdir$filename.data");
1.40      matthew  1298:     print $fh $gnuplot_input;
                   1299:     close($fh);
                   1300:     # That's all folks.
                   1301:     return ;
1.2       matthew  1302: }
1.21      matthew  1303: 
                   1304: #---------------------------------------------- check_inputs
                   1305: sub check_inputs {
                   1306:     ## Note: no inputs, no outputs - this acts only on global variables.
                   1307:     ## Make sure we have all the input we need:
1.107     foxr     1308:     if (! %Apache::lonplot::plot) { &set_defaults(\%Apache::lonplot::plot,\%gnuplot_defaults); }
1.23      matthew  1309:     if (! %key ) {} # No key for this plot, thats okay
1.34      matthew  1310: #    if (! %axis) { &set_defaults(\%axis,\%axis_defaults); }
1.21      matthew  1311:     if (! defined($title )) {} # No title for this plot, thats okay
                   1312:     if (! defined($xlabel)) {} # No xlabel for this plot, thats okay
                   1313:     if (! defined($ylabel)) {} # No ylabel for this plot, thats okay
                   1314:     if ($#labels < 0) { }      # No labels for this plot, thats okay
                   1315:     if ($#curves < 0) { 
                   1316: 	&Apache::lonxml::warning("No curves specified for plot!!!!");
                   1317: 	return '';
                   1318:     }
                   1319:     my $curve;
                   1320:     foreach $curve (@curves) {
                   1321: 	if (!defined($curve->{'function'})&&!defined($curve->{'data'})){
1.85      matthew  1322: 	    &Apache::lonxml::warning("One of the curves specified did not contain any curve data or curve function declarations\n");
1.21      matthew  1323: 	    return '';
                   1324: 	}
                   1325:     }
                   1326: }
                   1327: 
1.20      matthew  1328: #------------------------------------------------ make_edit
                   1329: sub edit_attributes {
1.34      matthew  1330:     my ($target,$token,$defaults,$keys) = @_;
                   1331:     my ($result,@keys);
                   1332:     if ($keys && ref($keys) eq 'ARRAY') {
                   1333:         @keys = @$keys;
                   1334:     } else {
                   1335: 	@keys = sort(keys(%$defaults));
                   1336:     }
                   1337:     foreach my $attr (@keys) {
1.35      matthew  1338: 	# append a ' ' to the description if it doesn't have one already.
                   1339: 	my $description = $defaults->{$attr}->{'description'};
                   1340: 	$description .= ' ' if ($description !~ / $/);
1.20      matthew  1341: 	if ($defaults->{$attr}->{'edit_type'} eq 'entry') {
1.35      matthew  1342: 	    $result .= &Apache::edit::text_arg
1.38      matthew  1343: 		($description,$attr,$token,
                   1344: 		 $defaults->{$attr}->{'size'});
1.20      matthew  1345: 	} elsif ($defaults->{$attr}->{'edit_type'} eq 'choice') {
1.102     albertel 1346: 	    $result .= &Apache::edit::select_or_text_arg
1.35      matthew  1347: 		($description,$attr,$defaults->{$attr}->{'choices'},$token);
1.45      matthew  1348: 	} elsif ($defaults->{$attr}->{'edit_type'} eq 'onoff') {
1.102     albertel 1349: 	    $result .= &Apache::edit::select_or_text_arg
1.35      matthew  1350: 		($description,$attr,['on','off'],$token);
1.20      matthew  1351: 	}
1.25      matthew  1352: 	$result .= '<br />';
1.20      matthew  1353:     }
                   1354:     return $result;
                   1355: }
1.1       matthew  1356: 
1.21      matthew  1357: 
                   1358: ###################################################################
                   1359: ##                                                               ##
                   1360: ##           Insertion functions for editing plots               ##
                   1361: ##                                                               ##
                   1362: ###################################################################
                   1363: 
1.47      matthew  1364: sub insert_gnuplot {
1.29      matthew  1365:     my $result = '';
1.20      matthew  1366:     #  plot attributes
1.61      matthew  1367:     $result .= "\n<gnuplot ";
1.47      matthew  1368:     foreach my $attr (keys(%gnuplot_defaults)) {
1.61      matthew  1369: 	$result .= "\n     $attr=\"$gnuplot_defaults{$attr}->{'default'}\"";
1.20      matthew  1370:     }
1.61      matthew  1371:     $result .= ">";
1.47      matthew  1372:     # Add the components (most are commented out for simplicity)
1.44      matthew  1373:     # $result .= &insert_key();
                   1374:     # $result .= &insert_axis();
                   1375:     # $result .= &insert_title();    
                   1376:     # $result .= &insert_xlabel();    
                   1377:     # $result .= &insert_ylabel();    
1.20      matthew  1378:     $result .= &insert_curve();
1.50      matthew  1379:     # close up the <gnuplot>
1.61      matthew  1380:     $result .= "\n</gnuplot>";
1.45      matthew  1381:     return $result;
                   1382: }
                   1383: 
1.46      matthew  1384: sub insert_tics {
                   1385:     my $result;
                   1386:     $result .= &insert_xtics() . &insert_ytics;
                   1387:     return $result;
                   1388: }
                   1389: 
1.45      matthew  1390: sub insert_xtics {
                   1391:     my $result;
1.46      matthew  1392:     $result .= "\n    <xtics ";
1.45      matthew  1393:     foreach my $attr (keys(%tic_defaults)) {
1.61      matthew  1394: 	$result .= "\n        $attr=\"$tic_defaults{$attr}->{'default'}\" ";
1.45      matthew  1395:     }
1.61      matthew  1396:     $result .= "/>";
1.45      matthew  1397:     return $result;
                   1398: }
                   1399: 
                   1400: sub insert_ytics {
                   1401:     my $result;
1.46      matthew  1402:     $result .= "\n    <ytics ";
1.45      matthew  1403:     foreach my $attr (keys(%tic_defaults)) {
1.61      matthew  1404: 	$result .= "\n        $attr=\"$tic_defaults{$attr}->{'default'}\" ";
1.45      matthew  1405:     }
1.61      matthew  1406:     $result .= "/>";
1.20      matthew  1407:     return $result;
                   1408: }
                   1409: 
                   1410: sub insert_key {
                   1411:     my $result;
1.61      matthew  1412:     $result .= "\n    <key ";
1.30      matthew  1413:     foreach my $attr (keys(%key_defaults)) {
1.61      matthew  1414: 	$result .= "\n         $attr=\"$key_defaults{$attr}->{'default'}\"";
1.20      matthew  1415:     }
1.61      matthew  1416:     $result .= " />";
1.20      matthew  1417:     return $result;
                   1418: }
                   1419: 
                   1420: sub insert_axis{
                   1421:     my $result;
1.46      matthew  1422:     $result .= "\n    <axis ";
1.30      matthew  1423:    foreach my $attr (keys(%axis_defaults)) {
1.61      matthew  1424: 	$result .= "\n         $attr=\"$axis_defaults{$attr}->{'default'}\"";
1.20      matthew  1425:     }
1.61      matthew  1426:     $result .= " />";
1.20      matthew  1427:     return $result;
                   1428: }
1.28      matthew  1429: 
1.61      matthew  1430: sub insert_title  { return "\n    <title></title>"; }
                   1431: sub insert_xlabel { return "\n    <xlabel></xlabel>"; }
                   1432: sub insert_ylabel { return "\n    <ylabel></ylabel>"; }
1.20      matthew  1433: 
                   1434: sub insert_label {
                   1435:     my $result;
1.46      matthew  1436:     $result .= "\n    <label ";
1.30      matthew  1437:     foreach my $attr (keys(%label_defaults)) {
1.61      matthew  1438: 	$result .= "\n         $attr=\"".
                   1439:             $label_defaults{$attr}->{'default'}."\"";
1.20      matthew  1440:     }
1.61      matthew  1441:     $result .= "></label>";
1.20      matthew  1442:     return $result;
                   1443: }
                   1444: 
                   1445: sub insert_curve {
                   1446:     my $result;
1.41      matthew  1447:     $result .= "\n    <curve ";
1.30      matthew  1448:     foreach my $attr (keys(%curve_defaults)) {
1.61      matthew  1449: 	$result .= "\n         $attr=\"".
                   1450: 	    $curve_defaults{$attr}->{'default'}."\"";
1.20      matthew  1451:     }
1.61      matthew  1452:     $result .= " >";
                   1453:     $result .= &insert_data().&insert_data()."\n    </curve>";
1.20      matthew  1454: }
1.4       matthew  1455: 
1.20      matthew  1456: sub insert_function {
                   1457:     my $result;
1.61      matthew  1458:     $result .= "\n        <function></function>";
1.20      matthew  1459:     return $result;
                   1460: }
1.4       matthew  1461: 
1.20      matthew  1462: sub insert_data {
                   1463:     my $result;
1.61      matthew  1464:     $result .= "\n        <data></data>";
1.20      matthew  1465:     return $result;
                   1466: }
1.4       matthew  1467: 
1.48      matthew  1468: ##----------------------------------------------------------------------
1.20      matthew  1469: 1;
                   1470: __END__
1.4       matthew  1471: 
                   1472: 

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