1: # The LearningOnline Network with CAPA
2: # Dynamic plot
3: #
4: # $Id: lonplot.pm,v 1.136 2008/03/24 21:53:41 raeburn Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28:
29: package Apache::lonplot;
30:
31: use strict;
32: use warnings FATAL=>'all';
33: no warnings 'uninitialized';
34: use Apache::File;
35: use Apache::response;
36: use Apache::lonxml;
37: use Apache::edit;
38: use Apache::lonnet;
39: use LONCAPA;
40:
41:
42: use vars qw/$weboutputformat $version/;
43:
44:
45:
46: BEGIN {
47: &Apache::lonxml::register('Apache::lonplot',('gnuplot'));
48: #
49: # Determine the version of GNUPLOT
50: $weboutputformat = 'gif';
51: my $versionstring = `gnuplot --version 2>/dev/null`;
52: ($version) = ($versionstring =~ /^gnuplot ([\d.]+)/);
53: if ($version >= 4) {
54: $weboutputformat = 'png';
55: }
56:
57: }
58:
59:
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
73: ## align
74: ##
75: ## @labels: $labels[$i] = \%label
76: ## %label: text, xpos, ypos, justify
77: ##
78: ## @curves: $curves[$i] = \%curve
79: ## %curve: name, linestyle, ( function | data )
80: ##
81: ## $curves[$i]->{'data'} = [ [x1,x2,x3,x4],
82: ## [y1,y2,y3,y4] ]
83: ##
84:
85: ###################################################################
86: ## ##
87: ## Tests used in checking the validitity of input ##
88: ## ##
89: ###################################################################
90:
91: my $max_str_len = 50; # if a label, title, xlabel, or ylabel text
92: # is longer than this, it will be truncated.
93:
94: my %linetypes =
95: (
96: solid => 1,
97: dashed => 0
98: );
99:
100: my %linestyles =
101: (
102: lines => 2, # Maybe this will be used in the future
103: linespoints => 2, # to check on whether or not they have
104: dots => 2, # supplied enough <data></data> fields
105: points => 2, # to use the given line style. But for
106: steps => 2, # now there are more important things
107: fsteps => 2, # for me to deal with.
108: histeps => 2,
109: errorbars => 3,
110: xerrorbars => [3,4],
111: yerrorbars => [3,4],
112: xyerrorbars => [4,6],
113: boxes => 3,
114: filledcurves => 2,
115: vector => 4
116: );
117:
118: my $int_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^\d+$/};
119: my $real_test =
120: sub {$_[0]=~s/\s+//g;$_[0]=~/^[+-]?\d*\.?\d*([eE][+-]\d+)?$/};
121: my $pos_real_test =
122: sub {$_[0]=~s/\s+//g;$_[0]=~/^[+]?\d*\.?\d*([eE][+-]\d+)?$/};
123: my $color_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^x[\da-fA-F]{6}$/};
124: my $onoff_test = sub {$_[0]=~/^(on|off)$/};
125: my $key_pos_test = sub {$_[0]=~/^(top|bottom|right|left|outside|below| )+$/};
126: my $sml_test = sub {$_[0]=~/^(\d+|small|medium|large)$/};
127: my $linestyle_test = sub {exists($linestyles{$_[0]})};
128: my $words_test = sub {$_[0]=~s/\s+/ /g;$_[0]=~/^([\w~!\@\#\$\%^&\*\(\)-=_\+\[\]\{\}:\;\'<>,\.\/\?\\]+ ?)+$/};
129:
130: ###################################################################
131: ## ##
132: ## Attribute metadata ##
133: ## ##
134: ###################################################################
135: my @gnuplot_edit_order =
136: qw/alttag bgcolor fgcolor height width texwidth fontface font texfont
137: transparent grid samples
138: border align plotcolor plottype gridtype lmargin rmargin
139: tmargin bmargin major_ticscale minor_ticscale boxwidth gridlayer fillstyle
140: pattern solid/;
141:
142: my $margin_choices = ['default',0..20];
143:
144: my %gnuplot_defaults =
145: (
146: alttag => {
147: default => 'dynamically generated plot',
148: test => $words_test,
149: description => 'Brief description of the plot',
150: edit_type => 'entry',
151: size => '40'
152: },
153: height => {
154: default => 300,
155: test => $int_test,
156: description => 'Height of image (pixels)',
157: edit_type => 'entry',
158: size => '10'
159: },
160: width => {
161: default => 400,
162: test => $int_test,
163: description => 'Width of image (pixels)',
164: edit_type => 'entry',
165: size => '10'
166: },
167: bgcolor => {
168: default => 'xffffff',
169: test => $color_test,
170: description => 'Background color of image (xffffff)',
171: edit_type => 'entry',
172: size => '10'
173: },
174: fgcolor => {
175: default => 'x000000',
176: test => $color_test,
177: description => 'Foreground color of image (x000000)',
178: edit_type => 'entry',
179: size => '10'
180: },
181: transparent => {
182: default => 'off',
183: test => $onoff_test,
184: description => 'Transparent image',
185: edit_type => 'onoff'
186: },
187: grid => {
188: default => 'on',
189: test => $onoff_test,
190: description => 'Display grid',
191: edit_type => 'onoff'
192: },
193: gridlayer => {
194: default => 'off',
195: test => $onoff_test,
196: description => 'Display grid front layer over filled boxes or filled curves',
197: edit_type => 'onoff'
198: },
199: box_border => {
200: default => 'noborder',
201: test => sub {$_[0]=~/^(noborder|border)$/},
202: description => 'Draw border for boxes',
203: edit_type => 'choice',
204: choices => ['border','noborder']
205: },
206: border => {
207: default => 'on',
208: test => $onoff_test,
209: description => 'Draw border around plot',
210: edit_type => 'onoff'
211: },
212: font => {
213: default => '9',
214: test => $sml_test,
215: description => 'Font size to use in web output (pts)',
216: edit_type => 'choice',
217: choices => [['5','5 (small)'],'6','7','8',['9','9 (medium)'],'10',['11','11 (large)'],'12','15']
218: },
219: fontface => {
220: default => 'sans-serif',
221: test => sub {$_[0]=~/^(sans-serif|serif|classic)$/},
222: description => 'Type of font to use',
223: edit_type => 'choice',
224: choices => ['sans-serif','serif', 'classic']
225: },
226: samples => {
227: default => '100',
228: test => $int_test,
229: description => 'Number of samples for non-data plots',
230: edit_type => 'choice',
231: choices => ['100','200','500','1000','2000','5000']
232: },
233: align => {
234: default => 'middle',
235: test => sub {$_[0]=~/^(left|right|middle|center)$/},
236: description => 'Alignment for image in HTML',
237: edit_type => 'choice',
238: choices => ['left','right','middle']
239: },
240: texwidth => {
241: default => '93',
242: test => $int_test,
243: description => 'Width of plot when printed (mm)',
244: edit_type => 'entry',
245: size => '5'
246: },
247: texfont => {
248: default => '22',
249: test => $int_test,
250: description => 'Font size to use in TeX output (pts):',
251: edit_type => 'choice',
252: choices => [qw/8 10 12 14 16 18 20 22 24 26 28 30 32 34 36/],
253: },
254: plotcolor => {
255: default => 'monochrome',
256: test => sub {$_[0]=~/^(monochrome|color|colour)$/},
257: description => 'Color setting for printing:',
258: edit_type => 'choice',
259: choices => [qw/monochrome color colour/],
260: },
261: pattern => {
262: default => '',
263: test => $int_test,
264: description => 'Pattern value for boxes:',
265: edit_type => 'choice',
266: choices => [0,1,2,3,4,5,6]
267: },
268: solid => {
269: default => 0,
270: test => $real_test,
271: description => 'The density of fill style for boxes',
272: edit_type => 'entry',
273: size => '5'
274: },
275: fillstyle => {
276: default => 'empty',
277: test => sub {$_[0]=~/^(empty|solid|pattern)$/},
278: description => 'Filled style for boxes:',
279: edit_type => 'choice',
280: choices => ['empty','solid','pattern']
281: },
282: plottype => {
283: default => 'Cartesian',
284: test => sub {$_[0]=~/^(Polar|Cartesian)$/},
285: description => 'Plot type:',
286: edit_type => 'choice',
287: choices => ['Cartesian','Polar']
288: },
289: gridtype => {
290: default => 'Cartesian',
291: test => sub {$_[0]=~/^(Polar|Cartesian|Linear-Log|Log-Linear|Log-Log)$/},
292: description => 'Grid type:',
293: edit_type => 'choice',
294: choices => ['Cartesian','Polar','Linear-Log','Log-Linear','Log-Log']
295: },
296: lmargin => {
297: default => 'default',
298: test => sub {$_[0]=~/^(default|\d+)$/},
299: description => 'Left margin width (pts):',
300: edit_type => 'choice',
301: choices => $margin_choices,
302: },
303: rmargin => {
304: default => 'default',
305: test => sub {$_[0]=~/^(default|\d+)$/},
306: description => 'Right margin width (pts):',
307: edit_type => 'choice',
308: choices => $margin_choices,
309: },
310: tmargin => {
311: default => 'default',
312: test => sub {$_[0]=~/^(default|\d+)$/},
313: description => 'Top margin width (pts):',
314: edit_type => 'choice',
315: choices => $margin_choices,
316: },
317: bmargin => {
318: default => 'default',
319: test => sub {$_[0]=~/^(default|\d+)$/},
320: description => 'Bottom margin width (pts):',
321: edit_type => 'choice',
322: choices => $margin_choices,
323: },
324: boxwidth => {
325: default => '',
326: test => $real_test,
327: description => 'Width of boxes, default is auto',
328: edit_type => 'entry',
329: size => '5'
330: },
331: major_ticscale => {
332: default => '1',
333: test => $real_test,
334: description => 'Size of major tic marks (plot coordinates)',
335: edit_type => 'entry',
336: size => '5'
337: },
338: minor_ticscale => {
339: default => '0.5',
340: test => $real_test,
341: description => 'Size of minor tic mark (plot coordinates)',
342: edit_type => 'entry',
343: size => '5'
344: },
345: );
346:
347: my %key_defaults =
348: (
349: title => {
350: default => '',
351: test => $words_test,
352: description => 'Title of key',
353: edit_type => 'entry',
354: size => '40'
355: },
356: box => {
357: default => 'off',
358: test => $onoff_test,
359: description => 'Draw a box around the key?',
360: edit_type => 'onoff'
361: },
362: pos => {
363: default => 'top right',
364: test => $key_pos_test,
365: description => 'Position of the key on the plot',
366: edit_type => 'choice',
367: choices => ['top left','top right','bottom left','bottom right',
368: 'outside','below']
369: }
370: );
371:
372: my %label_defaults =
373: (
374: xpos => {
375: default => 0,
376: test => $real_test,
377: description => 'X position of label (graph coordinates)',
378: edit_type => 'entry',
379: size => '10'
380: },
381: ypos => {
382: default => 0,
383: test => $real_test,
384: description => 'Y position of label (graph coordinates)',
385: edit_type => 'entry',
386: size => '10'
387: },
388: justify => {
389: default => 'left',
390: test => sub {$_[0]=~/^(left|right|center)$/},
391: description => 'justification of the label text on the plot',
392: edit_type => 'choice',
393: choices => ['left','right','center']
394: },
395: rotate => {
396: default => 0,
397: test => $real_test,
398: description => 'Rotation of label (degrees)',
399: edit_type => 'entry',
400: size => '10',
401: }
402: );
403:
404: my @tic_edit_order = ('location','mirror','start','increment','end',
405: 'minorfreq');
406: my %tic_defaults =
407: (
408: location => {
409: default => 'border',
410: test => sub {$_[0]=~/^(border|axis)$/},
411: description => 'Location of major tic marks',
412: edit_type => 'choice',
413: choices => ['border','axis']
414: },
415: mirror => {
416: default => 'on',
417: test => $onoff_test,
418: description => 'Mirror tics on opposite axis?',
419: edit_type => 'onoff'
420: },
421: start => {
422: default => '-10.0',
423: test => $real_test,
424: description => 'Start major tics at',
425: edit_type => 'entry',
426: size => '10'
427: },
428: increment => {
429: default => '1.0',
430: test => $real_test,
431: description => 'Place a major tic every',
432: edit_type => 'entry',
433: size => '10'
434: },
435: end => {
436: default => ' 10.0',
437: test => $real_test,
438: description => 'Stop major tics at ',
439: edit_type => 'entry',
440: size => '10'
441: },
442: minorfreq => {
443: default => '0',
444: test => $int_test,
445: description => 'Number of minor tics per major tic mark',
446: edit_type => 'entry',
447: size => '10'
448: },
449: );
450:
451: my @axis_edit_order = ('color','xmin','xmax','ymin','ymax','xformat', 'yformat');
452: my %axis_defaults =
453: (
454: color => {
455: default => 'x000000',
456: test => $color_test,
457: description => 'Color of grid lines (x000000)',
458: edit_type => 'entry',
459: size => '10'
460: },
461: xmin => {
462: default => '-10.0',
463: test => $real_test,
464: description => 'Minimum x-value shown in plot',
465: edit_type => 'entry',
466: size => '10'
467: },
468: xmax => {
469: default => ' 10.0',
470: test => $real_test,
471: description => 'Maximum x-value shown in plot',
472: edit_type => 'entry',
473: size => '10'
474: },
475: ymin => {
476: default => '-10.0',
477: test => $real_test,
478: description => 'Minimum y-value shown in plot',
479: edit_type => 'entry',
480: size => '10'
481: },
482: ymax => {
483: default => ' 10.0',
484: test => $real_test,
485: description => 'Maximum y-value shown in plot',
486: edit_type => 'entry',
487: size => '10'
488: },
489: xformat => {
490: default => 'on',
491: test => sub {$_[0]=~/^(on|off|\d+(f|F|e|E))$/},
492: description => 'X-axis number formatting',
493: edit_type => 'choice',
494: choices => ['on', 'off', '2e', '2f'],
495: },
496: yformat => {
497: default => 'on',
498: test => sub {$_[0]=~/^(on|off|\d+(f|F|e|E))$/},
499: description => 'X-axis number formatting',
500: edit_type => 'choice',
501: choices => ['on', 'off', '2e', '2f'],
502: },
503:
504: );
505:
506: my @curve_edit_order = ('color','name','linestyle','linewidth','linetype','pointtype','pointsize','limit');
507:
508: my %curve_defaults =
509: (
510: color => {
511: default => 'x000000',
512: test => $color_test,
513: description => 'Color of curve (x000000)',
514: edit_type => 'entry',
515: size => '10'
516: },
517: name => {
518: default => '',
519: test => $words_test,
520: description => 'Name of curve to appear in key',
521: edit_type => 'entry',
522: size => '20'
523: },
524: linestyle => {
525: default => 'lines',
526: test => $linestyle_test,
527: description => 'Plot with:',
528: edit_type => 'choice',
529: choices => [keys(%linestyles)]
530: },
531: linewidth => {
532: default => 1,
533: test => $int_test,
534: description => 'Line width (may not apply to all plot styles)',
535: edit_type => 'choice',
536: choices => [1,2,3,4,5,6,7,8,9,10]
537: },
538: linetype => {
539: default => 'solid',
540: test => sub {$_[0]=~/^(solid|dashed)$/},
541: description => 'Line type (may not apply to all plot styles)',
542: edit_type => 'choice',
543: choices => ['solid', 'dashed']
544: },
545: pointsize => {
546: default => 1,
547: test => $pos_real_test,
548: description => 'Point size (may not apply to all plot styles)',
549: edit_type => 'entry',
550: size => '5'
551: },
552: pointtype => {
553: default => 1,
554: test => $int_test,
555: description => 'Point type (may not apply to all plot styles)',
556: edit_type => 'choice',
557: choices => [0,1,2,3,4,5,6]
558: },
559: limit => {
560: default => 'closed',
561: test => sub {$_[0]=~/^(above|below|closed|x1|x2|y1|y2)$/},
562: description => 'Point to fill -- for filledcurves',
563: edit_type => 'choice',
564: choices => ['above', 'below', 'closed','x1','x2','y1','y2']
565: },
566: );
567:
568: ###################################################################
569: ## ##
570: ## parsing and edit rendering ##
571: ## ##
572: ###################################################################
573:
574: undef %Apache::lonplot::plot;
575: my (%key,%axis,$title,$xlabel,$ylabel,@labels,@curves,%xtics,%ytics);
576:
577: sub start_gnuplot {
578: undef(%Apache::lonplot::plot); undef(%key); undef(%axis);
579: undef($title); undef($xlabel); undef($ylabel);
580: undef(@labels); undef(@curves);
581: undef(%xtics); undef(%ytics);
582: #
583: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
584: my $result='';
585: &Apache::lonxml::register('Apache::lonplot',
586: ('title','xlabel','ylabel','key','axis','label','curve',
587: 'xtics','ytics'));
588: push (@Apache::lonxml::namespace,'lonplot');
589: if ($target eq 'web' || $target eq 'tex') {
590: &get_attributes(\%Apache::lonplot::plot,\%gnuplot_defaults,$parstack,$safeeval,
591: $tagstack->[-1]);
592: } elsif ($target eq 'edit') {
593: $result .= &Apache::edit::tag_start($target,$token,'GnuPlot');
594: $result .= &edit_attributes($target,$token,\%gnuplot_defaults,
595: \@gnuplot_edit_order)
596: .&Apache::edit::end_row()
597: .&Apache::edit::start_spanning_row();
598: } elsif ($target eq 'modified') {
599: my $constructtag=&Apache::edit::get_new_args
600: ($token,$parstack,$safeeval,keys(%gnuplot_defaults));
601: if ($constructtag) {
602: $result = &Apache::edit::rebuild_tag($token);
603: }
604: }
605: return $result;
606: }
607:
608: sub end_gnuplot {
609: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
610: pop @Apache::lonxml::namespace;
611: &Apache::lonxml::deregister('Apache::lonplot',
612: ('title','xlabel','ylabel','key','axis','label','curve'));
613: my $result = '';
614: my $randnumber;
615: # need to call rand everytime start_script would evaluate, as the
616: # safe space rand number generator and the global rand generator
617: # are not separate
618: if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
619: $target eq 'answer') {
620: $randnumber=int(rand(1000));
621: }
622: if ($target eq 'web' || $target eq 'tex') {
623: &check_inputs(); # Make sure we have all the data we need
624: ##
625: ## Determine filename
626: my $tmpdir = '/home/httpd/perl/tmp/';
627: my $filename = $env{'user.name'}.'_'.$env{'user.domain'}.
628: '_'.time.'_'.$$.$randnumber.'_plot';
629: ## Write the plot description to the file
630: &write_gnuplot_file($tmpdir,$filename,$target);
631: $filename = &escape($filename);
632: ## return image tag for the plot
633: if ($target eq 'web') {
634: $result .= <<"ENDIMAGE";
635: <img src = "/cgi-bin/plot.$weboutputformat?file=$filename.data"
636: width = "$Apache::lonplot::plot{'width'}"
637: height = "$Apache::lonplot::plot{'height'}"
638: align = "$Apache::lonplot::plot{'align'}"
639: alt = "$Apache::lonplot::plot{'alttag'}" />
640: ENDIMAGE
641: } elsif ($target eq 'tex') {
642: &Apache::lonxml::debug(" gnuplot wid = $Apache::lonplot::plot{'width'}");
643: &Apache::lonxml::debug(" gnuplot ht = $Apache::lonplot::plot{'height'}");
644: #might be inside the safe space, register the URL for later
645: &Apache::lonxml::register_ssi("/cgi-bin/plot.gif?file=$filename.data&output=eps");
646: $result = "%DYNAMICIMAGE:$Apache::lonplot::plot{'width'}:$Apache::lonplot::plot{'height'}:$Apache::lonplot::plot{'texwidth'}\n";
647: $result .= '\graphicspath{{/home/httpd/perl/tmp/}}'."\n";
648: $result .= '\includegraphics[width='.$Apache::lonplot::plot{'texwidth'}.' mm]{'.&unescape($filename).'.eps}';
649: }
650: } elsif ($target eq 'edit') {
651: $result.=&Apache::edit::tag_end($target,$token);
652: }
653: return $result;
654: }
655:
656:
657: ##--------------------------------------------------------------- xtics
658: sub start_xtics {
659: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
660: my $result='';
661: if ($target eq 'web' || $target eq 'tex') {
662: &get_attributes(\%xtics,\%tic_defaults,$parstack,$safeeval,
663: $tagstack->[-1]);
664: } elsif ($target eq 'edit') {
665: $result .= &Apache::edit::tag_start($target,$token,'xtics');
666: $result .= &edit_attributes($target,$token,\%tic_defaults,
667: \@tic_edit_order);
668: } elsif ($target eq 'modified') {
669: my $constructtag=&Apache::edit::get_new_args
670: ($token,$parstack,$safeeval,keys(%tic_defaults));
671: if ($constructtag) {
672: $result = &Apache::edit::rebuild_tag($token);
673: }
674: }
675: return $result;
676: }
677:
678: sub end_xtics {
679: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
680: my $result = '';
681: if ($target eq 'web' || $target eq 'tex') {
682: } elsif ($target eq 'edit') {
683: $result.=&Apache::edit::tag_end($target,$token);
684: }
685: return $result;
686: }
687:
688: ##--------------------------------------------------------------- ytics
689: sub start_ytics {
690: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
691: my $result='';
692: if ($target eq 'web' || $target eq 'tex') {
693: &get_attributes(\%ytics,\%tic_defaults,$parstack,$safeeval,
694: $tagstack->[-1]);
695: } elsif ($target eq 'edit') {
696: $result .= &Apache::edit::tag_start($target,$token,'ytics');
697: $result .= &edit_attributes($target,$token,\%tic_defaults,
698: \@tic_edit_order);
699: } elsif ($target eq 'modified') {
700: my $constructtag=&Apache::edit::get_new_args
701: ($token,$parstack,$safeeval,keys(%tic_defaults));
702: if ($constructtag) {
703: $result = &Apache::edit::rebuild_tag($token);
704: }
705: }
706: return $result;
707: }
708:
709: sub end_ytics {
710: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
711: my $result = '';
712: if ($target eq 'web' || $target eq 'tex') {
713: } elsif ($target eq 'edit') {
714: $result.=&Apache::edit::tag_end($target,$token);
715: }
716: return $result;
717: }
718:
719: ##-----------------------------------------------------------------font
720: my %font_properties =
721: (
722: 'classic' => {
723: face => 'classic',
724: file => 'DejaVuSansMono-Bold',
725: printname => 'Helvetica',
726: tex_no_file => 1,
727: },
728: 'sans-serif' => {
729: face => 'sans-serif',
730: file => 'DejaVuSans',
731: printname => 'DejaVuSans',
732: },
733: 'serif' => {
734: face => 'serif',
735: file => 'DejaVuSerif',
736: printname => 'DejaVuSerif',
737: },
738: );
739:
740: sub get_font {
741: my ($target) = @_;
742: my ($size, $selected_font);
743:
744: if ( $Apache::lonplot::plot{'font'} =~ /^(small|medium|large)/) {
745: $selected_font = $font_properties{'classic'};
746: if ( $Apache::lonplot::plot{'font'} eq 'small') {
747: $size = '5';
748: } elsif ( $Apache::lonplot::plot{'font'} eq 'medium') {
749: $size = '9';
750: } elsif ( $Apache::lonplot::plot{'font'} eq 'large') {
751: $size = '11';
752: } else {
753: $size = '9';
754: }
755: } else {
756: $size = $Apache::lonplot::plot{'font'};
757: $selected_font = $font_properties{$Apache::lonplot::plot{'fontface'}};
758: }
759: if ($target eq 'tex' && defined($Apache::lonplot::plot{'texfont'})) {
760: $size = $Apache::lonplot::plot{'texfont'};
761: }
762: return ($size, $selected_font);
763: }
764:
765: ##----------------------------------------------------------------- key
766: sub start_key {
767: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
768: my $result='';
769: if ($target eq 'web' || $target eq 'tex') {
770: &get_attributes(\%key,\%key_defaults,$parstack,$safeeval,
771: $tagstack->[-1]);
772: } elsif ($target eq 'edit') {
773: $result .= &Apache::edit::tag_start($target,$token,'Plot Key');
774: $result .= &edit_attributes($target,$token,\%key_defaults);
775: } elsif ($target eq 'modified') {
776: my $constructtag=&Apache::edit::get_new_args
777: ($token,$parstack,$safeeval,keys(%key_defaults));
778: if ($constructtag) {
779: $result = &Apache::edit::rebuild_tag($token);
780: }
781: }
782: return $result;
783: }
784:
785: sub end_key {
786: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
787: my $result = '';
788: if ($target eq 'web' || $target eq 'tex') {
789: } elsif ($target eq 'edit') {
790: $result.=&Apache::edit::tag_end($target,$token);
791: }
792: return $result;
793: }
794:
795: sub parse_label {
796: my ($target,$text) = @_;
797: my $parser=HTML::LCParser->new(\$text);
798: my $result;
799: while (my $token=$parser->get_token) {
800: if ($token->[0] eq 'S') {
801: if ($token->[1] eq 'sub') {
802: $result .= '_{';
803: } elsif ($token->[1] eq 'sup') {
804: $result .= '^{';
805: } else {
806: $result .= $token->[4];
807: }
808: } elsif ($token->[0] eq 'E') {
809: if ($token->[1] eq 'sub'
810: || $token->[1] eq 'sup') {
811: $result .= '}';
812: } else {
813: $result .= $token->[2];
814: }
815: } elsif ($token->[0] eq 'T') {
816: $result .= &replace_entities($target,$token->[1]);
817: }
818: }
819: return $result;
820: }
821:
822:
823: my %lookup =
824: ('(Alpha|#913)' => {'tex' => '{/Symbol A}', 'web' => "\x{391}"},
825: '(Beta|#914)' => {'tex' => '{/Symbol B}', 'web' => "\x{392}"},
826: '(Chi|#935)' => {'tex' => '{/Symbol C}', 'web' => "\x{3A7}"},
827: '(Delta|#916)' => {'tex' => '{/Symbol D}', 'web' => "\x{394}"},
828: '(Epsilon|#917)' => {'tex' => '{/Symbol E}', 'web' => "\x{395}"},
829: '(Phi|#934)' => {'tex' => '{/Symbol F}', 'web' => "\x{3A6}"},
830: '(Gamma|#915)' => {'tex' => '{/Symbol G}', 'web' => "\x{393}"},
831: '(Eta|#919)' => {'tex' => '{/Symbol H}', 'web' => "\x{397}"},
832: '(Iota|#921)' => {'tex' => '{/Symbol I}', 'web' => "\x{399}"},
833: '(Kappa|#922)' => {'tex' => '{/Symbol K}', 'web' => "\x{39A}"},
834: '(Lambda|#923)' => {'tex' => '{/Symbol L}', 'web' => "\x{39B}"},
835: '(Mu|#924)' => {'tex' => '{/Symbol M}', 'web' => "\x{39C}"},
836: '(Nu|#925)' => {'tex' => '{/Symbol N}', 'web' => "\x{39D}"},
837: '(Omicron|#927)' => {'tex' => '{/Symbol O}', 'web' => "\x{39F}"},
838: '(Pi|#928)' => {'tex' => '{/Symbol P}', 'web' => "\x{3A0}"},
839: '(Theta|#920)' => {'tex' => '{/Symbol Q}', 'web' => "\x{398}"},
840: '(Rho|#929)' => {'tex' => '{/Symbol R}', 'web' => "\x{3A1}"},
841: '(Sigma|#931)' => {'tex' => '{/Symbol S}', 'web' => "\x{3A3}"},
842: '(Tau|#932)' => {'tex' => '{/Symbol T}', 'web' => "\x{3A4}"},
843: '(Upsilon|#933)' => {'tex' => '{/Symbol U}', 'web' => "\x{3A5}"},
844: '(Omega|#937)' => {'tex' => '{/Symbol W}', 'web' => "\x{3A9}"},
845: '(Xi|#926)' => {'tex' => '{/Symbol X}', 'web' => "\x{39E}"},
846: '(Psi|#936)' => {'tex' => '{/Symbol Y}', 'web' => "\x{3A8}"},
847: '(Zeta|#918)' => {'tex' => '{/Symbol Z}', 'web' => "\x{396}"},
848: '(alpha|#945)' => {'tex' => '{/Symbol a}', 'web' => "\x{3B1}"},
849: '(beta|#946)' => {'tex' => '{/Symbol b}', 'web' => "\x{3B2}"},
850: '(chi|#967)' => {'tex' => '{/Symbol c}', 'web' => "\x{3C7}"},
851: '(delta|#948)' => {'tex' => '{/Symbol d}', 'web' => "\x{3B4}"},
852: '(epsilon|#949)' => {'tex' => '{/Symbol e}', 'web' => "\x{3B5}"},
853: '(phi|#966)' => {'tex' => '{/Symbol f}', 'web' => "\x{3C6}"},
854: '(gamma|#947)' => {'tex' => '{/Symbol g}', 'web' => "\x{3B3}"},
855: '(eta|#951)' => {'tex' => '{/Symbol h}', 'web' => "\x{3B7}"},
856: '(iota|#953)' => {'tex' => '{/Symbol i}', 'web' => "\x{3B9}"},
857: '(kappa|#954)' => {'tex' => '{/Symbol k}', 'web' => "\x{3BA}"},
858: '(lambda|#955)' => {'tex' => '{/Symbol k}', 'web' => "\x{3BB}"},
859: '(mu|#956)' => {'tex' => '{/Symbol m}', 'web' => "\x{3BC}"},
860: '(nu|#957)' => {'tex' => '{/Symbol n}', 'web' => "\x{3BD}"},
861: '(omicron|#959)' => {'tex' => '{/Symbol o}', 'web' => "\x{3BF}"},
862: '(pi|#960)' => {'tex' => '{/Symbol p}', 'web' => "\x{3C0}"},
863: '(theta|#952)' => {'tex' => '{/Symbol q}', 'web' => "\x{3B8}"},
864: '(rho|#961)' => {'tex' => '{/Symbol r}', 'web' => "\x{3C1}"},
865: '(sigma|#963)' => {'tex' => '{/Symbol s}', 'web' => "\x{3C3}"},
866: '(tau|#964)' => {'tex' => '{/Symbol t}', 'web' => "\x{3C4}"},
867: '(upsilon|#965)' => {'tex' => '{/Symbol u}', 'web' => "\x{3C5}"},
868: '(omega|#969)' => {'tex' => '{/Symbol w}', 'web' => "\x{3C9}"},
869: '(xi|#958)' => {'tex' => '{/Symbol x}', 'web' => "\x{3BE}"},
870: '(psi|#968)' => {'tex' => '{/Symbol y}', 'web' => "\x{3C8}"},
871: '(zeta|#950)' => {'tex' => '{/Symbol z}', 'web' => "\x{3B6}"},
872: );
873:
874:
875: sub replace_entities {
876: my ($target,$text) = @_;
877: $text =~ s{([_^~\{\}]|\\\\)}{\\\\$1}g;
878: while (my ($re, $replace) = each(%lookup)) {
879: $text =~ s/&$re;/$replace->{$target}/g;
880: }
881: $text =~ s{(&)}{\\\\$1}g;
882: return $text;
883: }
884:
885: ##------------------------------------------------------------------- title
886: sub start_title {
887: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
888: my $result='';
889: if ($target eq 'web' || $target eq 'tex') {
890: $title = &Apache::lonxml::get_all_text("/title",$parser,$style);
891: $title=&Apache::run::evaluate($title,$safeeval,$$parstack[-1]);
892: $title =~ s/\n/ /g;
893: if (length($title) > $max_str_len) {
894: $title = substr($title,0,$max_str_len);
895: }
896: $title = &parse_label($target,$title);
897: } elsif ($target eq 'edit') {
898: $result.=&Apache::edit::tag_start($target,$token,'Plot Title');
899: my $text=&Apache::lonxml::get_all_text("/title",$parser,$style);
900: $result.=&Apache::edit::editline('',$text,'',60);
901: } elsif ($target eq 'modified') {
902: $result.=&Apache::edit::rebuild_tag($token);
903: $result.=&Apache::edit::modifiedfield("/title",$parser);
904: }
905: return $result;
906: }
907:
908: sub end_title {
909: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
910: my $result = '';
911: if ($target eq 'web' || $target eq 'tex') {
912: } elsif ($target eq 'edit') {
913: $result.=&Apache::edit::tag_end($target,$token);
914: }
915: return $result;
916: }
917: ##------------------------------------------------------------------- xlabel
918: sub start_xlabel {
919: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
920: my $result='';
921: if ($target eq 'web' || $target eq 'tex') {
922: $xlabel = &Apache::lonxml::get_all_text("/xlabel",$parser,$style);
923: $xlabel=&Apache::run::evaluate($xlabel,$safeeval,$$parstack[-1]);
924: $xlabel =~ s/\n/ /g;
925: if (length($xlabel) > $max_str_len) {
926: $xlabel = substr($xlabel,0,$max_str_len);
927: }
928: $xlabel = &parse_label($target,$xlabel);
929: } elsif ($target eq 'edit') {
930: $result.=&Apache::edit::tag_start($target,$token,'Plot Xlabel');
931: my $text=&Apache::lonxml::get_all_text("/xlabel",$parser,$style);
932: $result.=&Apache::edit::editline('',$text,'',60);
933: } elsif ($target eq 'modified') {
934: $result.=&Apache::edit::rebuild_tag($token);
935: $result.=&Apache::edit::modifiedfield("/xlabel",$parser);
936: }
937: return $result;
938: }
939:
940: sub end_xlabel {
941: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
942: my $result = '';
943: if ($target eq 'web' || $target eq 'tex') {
944: } elsif ($target eq 'edit') {
945: $result.=&Apache::edit::tag_end($target,$token);
946: }
947: return $result;
948: }
949:
950: ##------------------------------------------------------------------- ylabel
951: sub start_ylabel {
952: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
953: my $result='';
954: if ($target eq 'web' || $target eq 'tex') {
955: $ylabel = &Apache::lonxml::get_all_text("/ylabel",$parser,$style);
956: $ylabel = &Apache::run::evaluate($ylabel,$safeeval,$$parstack[-1]);
957: $ylabel =~ s/\n/ /g;
958: if (length($ylabel) > $max_str_len) {
959: $ylabel = substr($ylabel,0,$max_str_len);
960: }
961: $ylabel = &parse_label($target,$ylabel);
962: } elsif ($target eq 'edit') {
963: $result .= &Apache::edit::tag_start($target,$token,'Plot Ylabel');
964: my $text = &Apache::lonxml::get_all_text("/ylabel",$parser,$style);
965: $result .= &Apache::edit::editline('',$text,'',60);
966: } elsif ($target eq 'modified') {
967: $result.=&Apache::edit::rebuild_tag($token);
968: $result.=&Apache::edit::modifiedfield("/ylabel",$parser);
969: }
970: return $result;
971: }
972:
973: sub end_ylabel {
974: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
975: my $result = '';
976: if ($target eq 'web' || $target eq 'tex') {
977: } elsif ($target eq 'edit') {
978: $result.=&Apache::edit::tag_end($target,$token);
979: }
980: return $result;
981: }
982:
983: ##------------------------------------------------------------------- label
984: sub start_label {
985: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
986: my $result='';
987: if ($target eq 'web' || $target eq 'tex') {
988: my %label;
989: &get_attributes(\%label,\%label_defaults,$parstack,$safeeval,
990: $tagstack->[-1]);
991: my $text = &Apache::lonxml::get_all_text("/label",$parser,$style);
992: $text = &Apache::run::evaluate($text,$safeeval,$$parstack[-1]);
993: $text =~ s/\n/ /g;
994: $text = substr($text,0,$max_str_len) if (length($text) > $max_str_len);
995: $label{'text'} = &parse_label($target,$text);
996: push(@labels,\%label);
997: } elsif ($target eq 'edit') {
998: $result .= &Apache::edit::tag_start($target,$token,'Plot Label');
999: $result .= &edit_attributes($target,$token,\%label_defaults);
1000: my $text = &Apache::lonxml::get_all_text("/label",$parser,$style);
1001: $result .= &Apache::edit::end_row().
1002: &Apache::edit::start_spanning_row().
1003: &Apache::edit::editline('',$text,'',60);
1004: } elsif ($target eq 'modified') {
1005: &Apache::edit::get_new_args
1006: ($token,$parstack,$safeeval,keys(%label_defaults));
1007: $result.=&Apache::edit::rebuild_tag($token);
1008: $result.=&Apache::edit::modifiedfield("/label",$parser);
1009: }
1010: return $result;
1011: }
1012:
1013: sub end_label {
1014: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1015: my $result = '';
1016: if ($target eq 'web' || $target eq 'tex') {
1017: } elsif ($target eq 'edit') {
1018: $result.=&Apache::edit::tag_end($target,$token);
1019: }
1020: return $result;
1021: }
1022:
1023: ##------------------------------------------------------------------- curve
1024: sub start_curve {
1025: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1026: my $result='';
1027: &Apache::lonxml::register('Apache::lonplot',('function','data'));
1028: push (@Apache::lonxml::namespace,'curve');
1029: if ($target eq 'web' || $target eq 'tex') {
1030: my %curve;
1031: &get_attributes(\%curve,\%curve_defaults,$parstack,$safeeval,
1032: $tagstack->[-1]);
1033: push (@curves,\%curve);
1034: } elsif ($target eq 'edit') {
1035: $result .= &Apache::edit::tag_start($target,$token,'Curve');
1036: $result .= &edit_attributes($target,$token,\%curve_defaults,
1037: \@curve_edit_order)
1038: .&Apache::edit::end_row()
1039: .&Apache::edit::start_spanning_row();
1040:
1041: } elsif ($target eq 'modified') {
1042: my $constructtag=&Apache::edit::get_new_args
1043: ($token,$parstack,$safeeval,keys(%curve_defaults));
1044: if ($constructtag) {
1045: $result = &Apache::edit::rebuild_tag($token);
1046: }
1047: }
1048: return $result;
1049: }
1050:
1051: sub end_curve {
1052: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1053: my $result = '';
1054: pop @Apache::lonxml::namespace;
1055: &Apache::lonxml::deregister('Apache::lonplot',('function','data'));
1056: if ($target eq 'web' || $target eq 'tex') {
1057: } elsif ($target eq 'edit') {
1058: $result.=&Apache::edit::tag_end($target,$token);
1059: }
1060: return $result;
1061: }
1062:
1063: ##------------------------------------------------------------ curve function
1064: sub start_function {
1065: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1066: my $result='';
1067: if ($target eq 'web' || $target eq 'tex') {
1068: if (exists($curves[-1]->{'data'})) {
1069: &Apache::lonxml::warning
1070: ('Use of the <b>curve function</b> tag precludes use of '.
1071: ' the <b>curve data</b> tag. '.
1072: 'The curve data tag will be omitted in favor of the '.
1073: 'curve function declaration.');
1074: delete $curves[-1]->{'data'} ;
1075: }
1076: my $function = &Apache::lonxml::get_all_text("/function",$parser,
1077: $style);
1078: $function = &Apache::run::evaluate($function,$safeeval,$$parstack[-1]);
1079: $curves[-1]->{'function'} = $function;
1080: } elsif ($target eq 'edit') {
1081: $result .= &Apache::edit::tag_start($target,$token,'Gnuplot compatible curve function');
1082: my $text = &Apache::lonxml::get_all_text("/function",$parser,$style);
1083: $result .= &Apache::edit::editline('',$text,'',60);
1084: } elsif ($target eq 'modified') {
1085: $result.=&Apache::edit::rebuild_tag($token);
1086: $result.=&Apache::edit::modifiedfield("/function",$parser);
1087: }
1088: return $result;
1089: }
1090:
1091: sub end_function {
1092: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1093: my $result = '';
1094: if ($target eq 'web' || $target eq 'tex') {
1095: } elsif ($target eq 'edit') {
1096: $result .= &Apache::edit::end_table();
1097: }
1098: return $result;
1099: }
1100:
1101: ##------------------------------------------------------------ curve data
1102: sub start_data {
1103: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1104: my $result='';
1105: if ($target eq 'web' || $target eq 'tex') {
1106: if (exists($curves[-1]->{'function'})) {
1107: &Apache::lonxml::warning
1108: ('Use of the <b>curve function</b> tag precludes use of '.
1109: ' the <b>curve data</b> tag. '.
1110: 'The curve function tag will be omitted in favor of the '.
1111: 'curve data declaration.');
1112: delete($curves[-1]->{'function'});
1113: }
1114: my $datatext = &Apache::lonxml::get_all_text("/data",$parser,$style);
1115: $datatext=&Apache::run::evaluate($datatext,$safeeval,$$parstack[-1]);
1116: # Deal with cases where we're given an array...
1117: if ($datatext =~ /^\@/) {
1118: $datatext = &Apache::run::run('return "'.$datatext.'"',
1119: $safeeval,1);
1120: }
1121: $datatext =~ s/\s+/ /g;
1122: # Need to do some error checking on the @data array -
1123: # make sure it's all numbers and make sure each array
1124: # is of the same length.
1125: my @data;
1126: if ($datatext =~ /,/) { # comma deliminated
1127: @data = split /,/,$datatext;
1128: } else { # Assume it's space separated.
1129: @data = split / /,$datatext;
1130: }
1131: for (my $i=0;$i<=$#data;$i++) {
1132: # Check that it's non-empty
1133: if (! defined($data[$i])) {
1134: &Apache::lonxml::warning(
1135: 'undefined curve data value. Replacing with '.
1136: ' pi/e = 1.15572734979092');
1137: $data[$i] = 1.15572734979092;
1138: }
1139: # Check that it's a number
1140: if (! &$real_test($data[$i]) & ! &$int_test($data[$i])) {
1141: &Apache::lonxml::warning(
1142: 'Bad curve data value of '.$data[$i].' Replacing with '.
1143: ' pi/e = 1.15572734979092');
1144: $data[$i] = 1.15572734979092;
1145: }
1146: }
1147: # complain if the number of data points is not the same as
1148: # in previous sets of data.
1149: if (($curves[-1]->{'data'}) && ($#data != $#{@{$curves[-1]->{'data'}->[0]}})){
1150: &Apache::lonxml::warning
1151: ('Number of data points is not consistent with previous '.
1152: 'number of data points');
1153: }
1154: push @{$curves[-1]->{'data'}},\@data;
1155: } elsif ($target eq 'edit') {
1156: $result .= &Apache::edit::tag_start($target,$token,'Comma or space deliminated curve data');
1157: my $text = &Apache::lonxml::get_all_text("/data",$parser,$style);
1158: $result .= &Apache::edit::editline('',$text,'',60);
1159: } elsif ($target eq 'modified') {
1160: $result.=&Apache::edit::rebuild_tag($token);
1161: $result.=&Apache::edit::modifiedfield("/data",$parser);
1162: }
1163: return $result;
1164: }
1165:
1166: sub end_data {
1167: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1168: my $result = '';
1169: if ($target eq 'web' || $target eq 'tex') {
1170: } elsif ($target eq 'edit') {
1171: $result .= &Apache::edit::end_table();
1172: }
1173: return $result;
1174: }
1175:
1176: ##------------------------------------------------------------------- axis
1177: sub start_axis {
1178: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1179: my $result='';
1180: if ($target eq 'web' || $target eq 'tex') {
1181: &get_attributes(\%axis,\%axis_defaults,$parstack,$safeeval,
1182: $tagstack->[-1]);
1183: } elsif ($target eq 'edit') {
1184: $result .= &Apache::edit::tag_start($target,$token,'Plot Axes');
1185: $result .= &edit_attributes($target,$token,\%axis_defaults,
1186: \@axis_edit_order);
1187: } elsif ($target eq 'modified') {
1188: my $constructtag=&Apache::edit::get_new_args
1189: ($token,$parstack,$safeeval,keys(%axis_defaults));
1190: if ($constructtag) {
1191: $result = &Apache::edit::rebuild_tag($token);
1192: }
1193: }
1194: return $result;
1195: }
1196:
1197: sub end_axis {
1198: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1199: my $result = '';
1200: if ($target eq 'web' || $target eq 'tex') {
1201: } elsif ($target eq 'edit') {
1202: $result.=&Apache::edit::tag_end($target,$token);
1203: } elsif ($target eq 'modified') {
1204: }
1205: return $result;
1206: }
1207:
1208: ###################################################################
1209: ## ##
1210: ## Utility Functions ##
1211: ## ##
1212: ###################################################################
1213:
1214: ##----------------------------------------------------------- set_defaults
1215: sub set_defaults {
1216: my ($var,$defaults) = @_;
1217: my $key;
1218: foreach $key (keys(%$defaults)) {
1219: $var->{$key} = $defaults->{$key}->{'default'};
1220: }
1221: }
1222:
1223: ##------------------------------------------------------------------- misc
1224: sub get_attributes{
1225: my ($values,$defaults,$parstack,$safeeval,$tag) = @_;
1226: foreach my $attr (keys(%{$defaults})) {
1227: if ($attr eq 'texwidth' || $attr eq 'texfont') {
1228: $values->{$attr} =
1229: &Apache::lonxml::get_param($attr,$parstack,$safeeval,undef,1);
1230: } else {
1231: $values->{$attr} =
1232: &Apache::lonxml::get_param($attr,$parstack,$safeeval);
1233: }
1234: if ($values->{$attr} eq '' | !defined($values->{$attr})) {
1235: $values->{$attr} = $defaults->{$attr}->{'default'};
1236: next;
1237: }
1238: my $test = $defaults->{$attr}->{'test'};
1239: if (! &$test($values->{$attr})) {
1240: &Apache::lonxml::warning
1241: ($tag.':'.$attr.': Bad value.'.'Replacing your value with : '
1242: .$defaults->{$attr}->{'default'} );
1243: $values->{$attr} = $defaults->{$attr}->{'default'};
1244: }
1245: }
1246: return ;
1247: }
1248:
1249: ##------------------------------------------------------- write_gnuplot_file
1250: sub write_gnuplot_file {
1251: my ($tmpdir,$filename,$target)= @_;
1252: my ($fontsize, $font_properties) = &get_font($target);
1253: my $gnuplot_input = '';
1254: my $curve;
1255: #
1256: # Check to be sure we do not have any empty curves
1257: my @curvescopy;
1258: foreach my $curve (@curves) {
1259: if (exists($curve->{'function'})) {
1260: if ($curve->{'function'} !~ /^\s*$/) {
1261: push(@curvescopy,$curve);
1262: }
1263: } elsif (exists($curve->{'data'})) {
1264: foreach my $data (@{$curve->{'data'}}) {
1265: if (scalar(@$data) > 0) {
1266: push(@curvescopy,$curve);
1267: last;
1268: }
1269: }
1270: }
1271: }
1272: @curves = @curvescopy;
1273: # Collect all the colors
1274: my @Colors;
1275: push @Colors, $Apache::lonplot::plot{'bgcolor'};
1276: push @Colors, $Apache::lonplot::plot{'fgcolor'};
1277: push @Colors, (defined($axis{'color'})?$axis{'color'}:$Apache::lonplot::plot{'fgcolor'});
1278: foreach $curve (@curves) {
1279: push @Colors, ($curve->{'color'} ne '' ?
1280: $curve->{'color'} :
1281: $Apache::lonplot::plot{'fgcolor'} );
1282: }
1283: # set term
1284: if ($target eq 'web') {
1285: $gnuplot_input .= 'set terminal png enhanced nocrop ';
1286: $gnuplot_input .= 'transparent ' if ($Apache::lonplot::plot{'transparent'} eq 'on');
1287: $gnuplot_input .= 'font "'.$Apache::lonnet::perlvar{'lonFontsDir'}.
1288: '/'.$font_properties->{'file'}.'.ttf" ';
1289: $gnuplot_input .= $fontsize;
1290: $gnuplot_input .= ' size '.$Apache::lonplot::plot{'width'}.','.$Apache::lonplot::plot{'height'}.' ';
1291: $gnuplot_input .= "@Colors\n";
1292: # set output
1293: $gnuplot_input .= "set output\n";
1294: } elsif ($target eq 'tex') {
1295: $gnuplot_input .= "set term postscript eps enhanced $Apache::lonplot::plot{'plotcolor'} solid ";
1296: if (!$font_properties->{'tex_no_file'}) {
1297: $gnuplot_input .=
1298: 'fontfile "'.$Apache::lonnet::perlvar{'lonFontsDir'}.
1299: '/'.$font_properties->{'file'}.'.pfb" ';
1300: }
1301: $gnuplot_input .= ' "'.$font_properties->{'printname'}.'" ';
1302: $gnuplot_input .= $fontsize;
1303: $gnuplot_input .= "\nset output \"/home/httpd/perl/tmp/".
1304: &unescape($filename).".eps\"\n";
1305: }
1306: # cartesian or polar plot?
1307: if (lc($Apache::lonplot::plot{'plottype'}) eq 'polar') {
1308: $gnuplot_input .= 'set polar'.$/;
1309: } else {
1310: # Assume Cartesian
1311: }
1312: # cartesian or polar grid?
1313: if (lc($Apache::lonplot::plot{'gridtype'}) eq 'polar') {
1314: $gnuplot_input .= 'set grid polar'.$/;
1315: } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'linear-log') {
1316: $gnuplot_input .= 'set logscale x'.$/;
1317: } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'log-linear') {
1318: $gnuplot_input .= 'set logscale y'.$/;
1319: } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'log-log') {
1320: $gnuplot_input .= 'set logscale x'.$/;
1321: $gnuplot_input .= 'set logscale y'.$/;
1322: } else {
1323: # Assume Cartesian
1324: }
1325: # solid or pattern for boxes?
1326: if (lc($Apache::lonplot::plot{'fillstyle'}) eq 'solid') {
1327: $gnuplot_input .= 'set style fill solid '.
1328: $Apache::lonplot::plot{'solid'}.$Apache::lonplot::plot{'box_border'}.$/;
1329: } elsif (lc($Apache::lonplot::plot{'fillstyle'}) eq 'pattern') {
1330: $gnuplot_input .= 'set style fill pattern '.$Apache::lonplot::plot{'pattern'}.$Apache::lonplot::plot{'box_border'}.$/;
1331: } elsif (lc($Apache::lonplot::plot{'fillstyle'}) eq 'empty') {
1332: }
1333: # margin
1334: if (lc($Apache::lonplot::plot{'lmargin'}) ne 'default') {
1335: $gnuplot_input .= 'set lmargin '.$Apache::lonplot::plot{'lmargin'}.$/;
1336: }
1337: if (lc($Apache::lonplot::plot{'rmargin'}) ne 'default') {
1338: $gnuplot_input .= 'set rmargin '.$Apache::lonplot::plot{'rmargin'}.$/;
1339: }
1340: if (lc($Apache::lonplot::plot{'tmargin'}) ne 'default') {
1341: $gnuplot_input .= 'set tmargin '.$Apache::lonplot::plot{'tmargin'}.$/;
1342: }
1343: if (lc($Apache::lonplot::plot{'bmargin'}) ne 'default') {
1344: $gnuplot_input .= 'set bmargin '.$Apache::lonplot::plot{'bmargin'}.$/;
1345: }
1346:
1347: # tic scales
1348: if ($version > 4) {
1349: $gnuplot_input .= 'set tics scale '.
1350: $Apache::lonplot::plot{'major_ticscale'}.', '.$Apache::lonplot::plot{'minor_ticscale'}.$/;
1351: } else {
1352: $gnuplot_input .= 'set ticscale '.
1353: $Apache::lonplot::plot{'major_ticscale'}.' '.$Apache::lonplot::plot{'minor_ticscale'}.$/;
1354: }
1355: #boxwidth
1356: if (lc($Apache::lonplot::plot{'boxwidth'}) ne '') {
1357: $gnuplot_input .= 'set boxwidth '.$Apache::lonplot::plot{'boxwidth'}.$/;
1358: }
1359: # gridlayer
1360: $gnuplot_input .= 'set grid noxtics noytics front '.$/
1361: if ($Apache::lonplot::plot{'gridlayer'} eq 'on');
1362:
1363: # grid
1364: $gnuplot_input .= 'set grid'.$/ if ($Apache::lonplot::plot{'grid'} eq 'on');
1365: # border
1366: $gnuplot_input .= ($Apache::lonplot::plot{'border'} eq 'on'?
1367: 'set border'.$/ :
1368: 'set noborder'.$/ );
1369: # sampling rate for non-data curves
1370: $gnuplot_input .= "set samples $Apache::lonplot::plot{'samples'}\n";
1371: # title, xlabel, ylabel
1372: # titles
1373: my $extra_space_x = ($xtics{'location'} eq 'axis') ? ' 0, -0.5 ' : '';
1374: my $extra_space_y = ($ytics{'location'} eq 'axis') ? ' -0.5, 0 ' : '';
1375:
1376: if ($target eq 'tex') {
1377: $gnuplot_input .= "set title \"$title\" font \"".$font_properties->{'printname'}.",".$fontsize."pt\"\n" if (defined($title)) ;
1378: $gnuplot_input .= "set xlabel \"$xlabel\" $extra_space_x font \"".$font_properties->{'printname'}.",".$fontsize."pt\"\n" if (defined($xlabel));
1379: $gnuplot_input .= "set ylabel \"$ylabel\" $extra_space_y font \"".$font_properties->{'printname'}.",".$fontsize."pt\"\n" if (defined($ylabel));
1380: } else {
1381: $gnuplot_input .= "set title \"$title\" \n" if (defined($title)) ;
1382: $gnuplot_input .= "set xlabel \"$xlabel\" $extra_space_x \n" if (defined($xlabel));
1383: $gnuplot_input .= "set ylabel \"$ylabel\" $extra_space_y \n" if (defined($ylabel));
1384: }
1385: # tics
1386: if (%xtics) {
1387: $gnuplot_input .= "set xtics $xtics{'location'} ";
1388: $gnuplot_input .= ( $xtics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1389: $gnuplot_input .= "$xtics{'start'}, ";
1390: $gnuplot_input .= "$xtics{'increment'}, ";
1391: $gnuplot_input .= "$xtics{'end'}\n";
1392: if ($xtics{'minorfreq'} != 0) {
1393: $gnuplot_input .= "set mxtics ".$xtics{'minorfreq'}."\n";
1394: }
1395: }
1396: if (%ytics) {
1397: $gnuplot_input .= "set ytics $ytics{'location'} ";
1398: $gnuplot_input .= ( $ytics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1399: $gnuplot_input .= "$ytics{'start'}, ";
1400: $gnuplot_input .= "$ytics{'increment'}, ";
1401: $gnuplot_input .= "$ytics{'end'}\n";
1402: if ($ytics{'minorfreq'} != 0) {
1403: $gnuplot_input .= "set mytics ".$ytics{'minorfreq'}."\n";
1404: }
1405: }
1406: # axis
1407: if (%axis) {
1408: if ($axis{'xformat'} ne 'on') {
1409: $gnuplot_input .= "set format x ";
1410: if ($axis{'xformat'} eq 'off') {
1411: $gnuplot_input .= "\"\"\n";
1412: } else {
1413: $gnuplot_input .= "\"\%.".$axis{'xformat'}."\"\n";
1414: }
1415: }
1416: if ($axis{'yformat'} ne 'on') {
1417: $gnuplot_input .= "set format y ";
1418: if ($axis{'yformat'} eq 'off') {
1419: $gnuplot_input .= "\"\"\n";
1420: } else {
1421: $gnuplot_input .= "\"\%.".$axis{'yformat'}."\"\n";
1422: }
1423: }
1424: $gnuplot_input .= "set xrange \[$axis{'xmin'}:$axis{'xmax'}\]\n";
1425: $gnuplot_input .= "set yrange \[$axis{'ymin'}:$axis{'ymax'}\]\n";
1426: }
1427: # Key
1428: if (%key) {
1429: $gnuplot_input .= 'set key '.$key{'pos'}.' ';
1430: if ($key{'title'} ne '') {
1431: $gnuplot_input .= 'title "'.$key{'title'}.'" ';
1432: }
1433: $gnuplot_input .= ($key{'box'} eq 'on' ? 'box ' : 'nobox ').$/;
1434: } else {
1435: $gnuplot_input .= 'set nokey'.$/;
1436: }
1437: # labels
1438: my $label;
1439: foreach $label (@labels) {
1440: $gnuplot_input .= 'set label "'.$label->{'text'}.'" at '.
1441: $label->{'xpos'}.','.$label->{'ypos'};
1442: if ($label->{'rotate'} ne '') {
1443: $gnuplot_input .= ' rotate by '.$label->{'rotate'};
1444: }
1445: $gnuplot_input .= ' '.$label->{'justify'};
1446:
1447: if ($target eq 'tex') {
1448: $gnuplot_input .=' font "'.$font_properties->{'printname'}.','.$fontsize.'pt"' ;
1449: }
1450: $gnuplot_input .= $/;
1451: }
1452: if ($target eq 'tex') {
1453: $gnuplot_input .="set size 1,".$Apache::lonplot::plot{'height'}/$Apache::lonplot::plot{'width'}*1.38;
1454: $gnuplot_input .="\n";
1455: }
1456: # curves
1457: $gnuplot_input .= 'plot ';
1458: for (my $i = 0;$i<=$#curves;$i++) {
1459: $curve = $curves[$i];
1460: $gnuplot_input.= ', ' if ($i > 0);
1461: if ($target eq 'tex') {
1462: $curve->{'linewidth'} *= 2;
1463: }
1464: if (exists($curve->{'function'})) {
1465: $gnuplot_input.=
1466: $curve->{'function'}.' title "'.
1467: $curve->{'name'}.'" with '.
1468: $curve->{'linestyle'};
1469:
1470: if (($curve->{'linestyle'} eq 'points') ||
1471: ($curve->{'linestyle'} eq 'linespoints') ||
1472: ($curve->{'linestyle'} eq 'errorbars') ||
1473: ($curve->{'linestyle'} eq 'xerrorbars') ||
1474: ($curve->{'linestyle'} eq 'yerrorbars') ||
1475: ($curve->{'linestyle'} eq 'xyerrorbars')) {
1476: $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
1477: $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1478: } elsif ($curve->{'linestyle'} eq 'filledcurves') {
1479: $gnuplot_input.= ' '.$curve->{'limit'};
1480: } elsif ($curve->{'linetype'} ne '' &&
1481: $curve->{'linestyle'} eq 'lines') {
1482: $gnuplot_input.= ' linetype ';
1483: $gnuplot_input.= $linetypes{$curve->{'linetype'}};
1484: $gnuplot_input.= ' linecolor rgb "';
1485: # convert color from xaaaaaa to #aaaaaa
1486: $curve->{'color'} =~ s/^x/#/;
1487: $gnuplot_input.= $curve->{'color'}.'"';
1488: }
1489: $gnuplot_input.= ' linewidth '.$curve->{'linewidth'};
1490:
1491: } elsif (exists($curve->{'data'})) {
1492: # Store data values in $datatext
1493: my $datatext = '';
1494: # get new filename
1495: my $datafilename = "$tmpdir/$filename.data.$i";
1496: my $fh=Apache::File->new(">$datafilename");
1497: # Compile data
1498: my @Data = @{$curve->{'data'}};
1499: my @Data0 = @{$Data[0]};
1500: for (my $i =0; $i<=$#Data0; $i++) {
1501: my $dataset;
1502: foreach $dataset (@Data) {
1503: $datatext .= $dataset->[$i] . ' ';
1504: }
1505: $datatext .= $/;
1506: }
1507: # write file
1508: print $fh $datatext;
1509: close($fh);
1510: # generate gnuplot text
1511: $gnuplot_input.= '"'.$datafilename.'" title "'.
1512: $curve->{'name'}.'" with '.
1513: $curve->{'linestyle'};
1514: if (($curve->{'linestyle'} eq 'points') ||
1515: ($curve->{'linestyle'} eq 'linespoints') ||
1516: ($curve->{'linestyle'} eq 'errorbars') ||
1517: ($curve->{'linestyle'} eq 'xerrorbars') ||
1518: ($curve->{'linestyle'} eq 'yerrorbars') ||
1519: ($curve->{'linestyle'} eq 'xyerrorbars')) {
1520: $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
1521: $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1522: } elsif ($curve->{'linestyle'} eq 'filledcurves') {
1523: $gnuplot_input.= ' '.$curve->{'limit'};
1524: } elsif ($curve->{'linetype'} ne '' &&
1525: $curve->{'linestyle'} eq 'lines') {
1526: $gnuplot_input.= ' linetype ';
1527: $gnuplot_input.= $linetypes{$curve->{'linetype'}};
1528: $gnuplot_input.= ' linecolor rgb "';
1529: # convert color from xaaaaaa to #aaaaaa
1530: $curve->{'color'} =~ s/^x/#/;
1531: $gnuplot_input.= $curve->{'color'}.'"';
1532: }
1533: $gnuplot_input.= ' linewidth '.$curve->{'linewidth'};
1534: }
1535: }
1536: # Write the output to a file.
1537: open (my $fh,">$tmpdir$filename.data");
1538: binmode($fh, ":utf8");
1539: print $fh $gnuplot_input;
1540: close($fh);
1541: # That's all folks.
1542: return ;
1543: }
1544:
1545: #---------------------------------------------- check_inputs
1546: sub check_inputs {
1547: ## Note: no inputs, no outputs - this acts only on global variables.
1548: ## Make sure we have all the input we need:
1549: if (! %Apache::lonplot::plot) { &set_defaults(\%Apache::lonplot::plot,\%gnuplot_defaults); }
1550: if (! %key ) {} # No key for this plot, thats okay
1551: # if (! %axis) { &set_defaults(\%axis,\%axis_defaults); }
1552: if (! defined($title )) {} # No title for this plot, thats okay
1553: if (! defined($xlabel)) {} # No xlabel for this plot, thats okay
1554: if (! defined($ylabel)) {} # No ylabel for this plot, thats okay
1555: if ($#labels < 0) { } # No labels for this plot, thats okay
1556: if ($#curves < 0) {
1557: &Apache::lonxml::warning("No curves specified for plot!!!!");
1558: return '';
1559: }
1560: my $curve;
1561: foreach $curve (@curves) {
1562: if (!defined($curve->{'function'})&&!defined($curve->{'data'})){
1563: &Apache::lonxml::warning("One of the curves specified did not contain any curve data or curve function declarations\n");
1564: return '';
1565: }
1566: }
1567: }
1568:
1569: #------------------------------------------------ make_edit
1570: sub edit_attributes {
1571: my ($target,$token,$defaults,$keys) = @_;
1572: my ($result,@keys);
1573: if ($keys && ref($keys) eq 'ARRAY') {
1574: @keys = @$keys;
1575: } else {
1576: @keys = sort(keys(%$defaults));
1577: }
1578: foreach my $attr (@keys) {
1579: # append a ' ' to the description if it doesn't have one already.
1580: my $description = $defaults->{$attr}->{'description'};
1581: $description .= ' ' if ($description !~ / $/);
1582: if ($defaults->{$attr}->{'edit_type'} eq 'entry') {
1583: $result .= &Apache::edit::text_arg
1584: ($description,$attr,$token,
1585: $defaults->{$attr}->{'size'});
1586: } elsif ($defaults->{$attr}->{'edit_type'} eq 'choice') {
1587: $result .= &Apache::edit::select_or_text_arg
1588: ($description,$attr,$defaults->{$attr}->{'choices'},$token);
1589: } elsif ($defaults->{$attr}->{'edit_type'} eq 'onoff') {
1590: $result .= &Apache::edit::select_or_text_arg
1591: ($description,$attr,['on','off'],$token);
1592: }
1593: $result .= '<br />';
1594: }
1595: return $result;
1596: }
1597:
1598:
1599: ###################################################################
1600: ## ##
1601: ## Insertion functions for editing plots ##
1602: ## ##
1603: ###################################################################
1604:
1605: sub insert_gnuplot {
1606: my $result = '';
1607: # plot attributes
1608: $result .= "\n<gnuplot ";
1609: foreach my $attr (keys(%gnuplot_defaults)) {
1610: $result .= "\n $attr=\"$gnuplot_defaults{$attr}->{'default'}\"";
1611: }
1612: $result .= ">";
1613: # Add the components (most are commented out for simplicity)
1614: # $result .= &insert_key();
1615: # $result .= &insert_axis();
1616: # $result .= &insert_title();
1617: # $result .= &insert_xlabel();
1618: # $result .= &insert_ylabel();
1619: $result .= &insert_curve();
1620: # close up the <gnuplot>
1621: $result .= "\n</gnuplot>";
1622: return $result;
1623: }
1624:
1625: sub insert_tics {
1626: my $result;
1627: $result .= &insert_xtics() . &insert_ytics;
1628: return $result;
1629: }
1630:
1631: sub insert_xtics {
1632: my $result;
1633: $result .= "\n <xtics ";
1634: foreach my $attr (keys(%tic_defaults)) {
1635: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
1636: }
1637: $result .= "/>";
1638: return $result;
1639: }
1640:
1641: sub insert_ytics {
1642: my $result;
1643: $result .= "\n <ytics ";
1644: foreach my $attr (keys(%tic_defaults)) {
1645: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
1646: }
1647: $result .= "/>";
1648: return $result;
1649: }
1650:
1651: sub insert_key {
1652: my $result;
1653: $result .= "\n <key ";
1654: foreach my $attr (keys(%key_defaults)) {
1655: $result .= "\n $attr=\"$key_defaults{$attr}->{'default'}\"";
1656: }
1657: $result .= " />";
1658: return $result;
1659: }
1660:
1661: sub insert_axis{
1662: my $result;
1663: $result .= "\n <axis ";
1664: foreach my $attr (keys(%axis_defaults)) {
1665: $result .= "\n $attr=\"$axis_defaults{$attr}->{'default'}\"";
1666: }
1667: $result .= " />";
1668: return $result;
1669: }
1670:
1671: sub insert_title { return "\n <title></title>"; }
1672: sub insert_xlabel { return "\n <xlabel></xlabel>"; }
1673: sub insert_ylabel { return "\n <ylabel></ylabel>"; }
1674:
1675: sub insert_label {
1676: my $result;
1677: $result .= "\n <label ";
1678: foreach my $attr (keys(%label_defaults)) {
1679: $result .= "\n $attr=\"".
1680: $label_defaults{$attr}->{'default'}."\"";
1681: }
1682: $result .= "></label>";
1683: return $result;
1684: }
1685:
1686: sub insert_curve {
1687: my $result;
1688: $result .= "\n <curve ";
1689: foreach my $attr (keys(%curve_defaults)) {
1690: $result .= "\n $attr=\"".
1691: $curve_defaults{$attr}->{'default'}."\"";
1692: }
1693: $result .= " >";
1694: $result .= &insert_data().&insert_data()."\n </curve>";
1695: }
1696:
1697: sub insert_function {
1698: my $result;
1699: $result .= "\n <function></function>";
1700: return $result;
1701: }
1702:
1703: sub insert_data {
1704: my $result;
1705: $result .= "\n <data></data>";
1706: return $result;
1707: }
1708:
1709: ##----------------------------------------------------------------------
1710: 1;
1711: __END__
1712:
1713:
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