1: # The LearningOnline Network with CAPA
2: # Dynamic plot
3: #
4: # $Id: lonplot.pm,v 1.177 2017/04/02 21:38:15 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:
30:
31:
32: package Apache::lonplot;
33:
34: use strict;
35: use warnings FATAL=>'all';
36: no warnings 'uninitialized';
37: use Apache::File;
38: use Apache::response;
39: use Apache::lonxml;
40: use Apache::edit;
41: use Apache::lonnet;
42: use LONCAPA;
43:
44:
45: use vars qw/$weboutputformat $version/;
46:
47:
48:
49: BEGIN {
50: &Apache::lonxml::register('Apache::lonplot',('gnuplot'));
51: #
52: # Determine the version of GNUPLOT
53: $weboutputformat = 'gif';
54: my $versionstring = `gnuplot --version 2>/dev/null`;
55: ($version) = ($versionstring =~ /^gnuplot ([\d.]+)/);
56: if ($version >= 4) {
57: $weboutputformat = 'png';
58: }
59:
60: }
61:
62:
63: =pod
64:
65: ##
66: ## Description of data structures:
67: ##
68: ## %plot %key %axis
69: ## --------------------------
70: ## height title color
71: ## width box xmin
72: ## bgcolor pos xmax
73: ## fgcolor ymin
74: ## transparent ymax
75: ## grid
76: ## border
77: ## font
78: ## align
79: ##
80: ## @labels: $labels[$i] = \%label
81: ## %label: text, xpos, ypos, justify, rotate, zlayer
82: ##
83: ## @curves: $curves[$i] = \%curve
84: ## %curve: name, linestyle, ( function | data )
85: ##
86: ## $curves[$i]->{'data'} = [ [x1,x2,x3,x4],
87: ## [y1,y2,y3,y4] ]
88: ##
89:
90: ###################################################################
91: ## ##
92: ## Tests used in checking the validitity of input ##
93: ## ##
94: ###################################################################
95:
96: =cut
97:
98: my $max_str_len = 50; # if a label, title, xlabel, or ylabel text
99: # is longer than this, it will be truncated.
100:
101: my %linetypes = # For png use these linetypes.
102: (
103: solid => 1,
104: dashed => 0
105: );
106: my %ps_linetypes = # For ps the line types are different!
107: (
108: solid => 1,
109: dashed => 7
110: );
111:
112: my %linestyles =
113: (
114: lines => 2, # Maybe this will be used in the future
115: linespoints => 2, # to check on whether or not they have
116: dots => 2, # supplied enough <data></data> fields
117: points => 2, # to use the given line style. But for
118: steps => 2, # now there are more important things
119: fsteps => 2, # for me to deal with.
120: histeps => 2,
121: errorbars => 3,
122: xerrorbars => [3,4],
123: yerrorbars => [3,4],
124: xyerrorbars => [4,6],
125: boxes => 3,
126: filledcurves => 2,
127: vector => 4
128: );
129:
130: my $int_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^\d+$/};
131: my $real_test =
132: sub {$_[0]=~s/\s+//g;$_[0]=~/^[+-]?\d*\.?\d*([eE][+-]\d+)?$/};
133: my $pos_real_test =
134: sub {$_[0]=~s/\s+//g;$_[0]=~/^[+]?\d*\.?\d*([eE][+-]\d+)?$/};
135: my $color_test;
136: if ($version < 4.6) {
137: $color_test = sub {$_[0]=~s/\s+//g;$_[0]=~s/^\#/x/;$_[0]=~/^x[\da-fA-F]{6}$/};
138: } else {
139: $color_test = sub {$_[0]=~s/\s+//g;$_[0]=~s/^x/#/;$_[0]=~/^\#[\da-fA-F]{6}$/};
140: }
141: my $onoff_test = sub {$_[0]=~/^(on|off)$/};
142: my $key_pos_test = sub {$_[0]=~/^(top|bottom|right|left|outside|below| )+$/};
143: my $sml_test = sub {$_[0]=~/^(\d+|small|medium|large)$/};
144: my $linestyle_test = sub {exists($linestyles{$_[0]})};
145: my $words_test = sub {$_[0]=~s/\s+/ /g;$_[0]=~/^([\w~!\@\#\$\%^&\*\(\)-=_\+\[\]\{\}:\;\'<>,\.\/\?\\]+ ?)+$/};
146:
147: my $arrowhead_test = sub{$_[0]=~/^(nohead|head|heads| )+$/};
148: my $arrowstyle_test= sub{$_[0]=~/^(filled|empty|nofilled)+$/};
149: my $degree_test = sub{&$pos_real_test($_[0]) && ($_[0] <= 360.0)};
150:
151: ###################################################################
152: ## ##
153: ## Attribute metadata ##
154: ## ##
155: ###################################################################
156: my @gnuplot_edit_order =
157: qw/alttag bgcolor fgcolor height width texwidth fontface font texfont
158: transparent grid samples
159: border align plotcolor plottype gridtype lmargin rmargin
160: tmargin bmargin major_ticscale minor_ticscale boxwidth gridlayer fillstyle
161: pattern solid/;
162:
163: my $margin_choices = ['default',0..20];
164:
165: my %gnuplot_defaults =
166: (
167: alttag => {
168: default => 'dynamically generated plot',
169: test => $words_test,
170: description => 'Brief description of the plot',
171: edit_type => 'entry',
172: size => '40'
173: },
174: height => {
175: default => 300,
176: test => $int_test,
177: description => 'Height of image (pixels)',
178: edit_type => 'entry',
179: size => '10'
180: },
181: width => {
182: default => 400,
183: test => $int_test,
184: description => 'Width of image (pixels)',
185: edit_type => 'entry',
186: size => '10'
187: },
188: bgcolor => {
189: default => 'xffffff',
190: test => $color_test,
191: description => 'Background color of image (xffffff)',
192: edit_type => 'entry',
193: size => '10',
194: class => 'colorchooser'
195: },
196: fgcolor => {
197: default => 'x000000',
198: test => $color_test,
199: description => 'Foreground color of image (x000000)',
200: edit_type => 'entry',
201: size => '10',
202: class => 'colorchooser'
203: },
204: transparent => {
205: default => 'off',
206: test => $onoff_test,
207: description => 'Transparent image',
208: edit_type => 'onoff'
209: },
210: grid => {
211: default => 'on',
212: test => $onoff_test,
213: description => 'Display grid',
214: edit_type => 'onoff'
215: },
216: gridlayer => {
217: default => 'off',
218: test => $onoff_test,
219: description => 'Display grid front layer over filled boxes or filled curves',
220: edit_type => 'onoff'
221: },
222: box_border => {
223: default => 'noborder',
224: test => sub {$_[0]=~/^(noborder|border)$/},
225: description => 'Draw border for boxes',
226: edit_type => 'choice',
227: choices => ['border','noborder']
228: },
229: border => {
230: default => 'on',
231: test => $onoff_test,
232: description => 'Draw border around plot',
233: edit_type => 'onoff'
234: },
235: font => {
236: default => '9',
237: test => $sml_test,
238: description => 'Font size to use in web output (pts)',
239: edit_type => 'choice',
240: choices => [['5','5 (small)'],'6','7','8',['9','9 (medium)'],'10',['11','11 (large)'],'12','15']
241: },
242: fontface => {
243: default => 'sans-serif',
244: test => sub {$_[0]=~/^(sans-serif|serif|classic)$/},
245: description => 'Type of font to use',
246: edit_type => 'choice',
247: choices => ['sans-serif','serif', 'classic']
248: },
249: samples => {
250: default => '100',
251: test => $int_test,
252: description => 'Number of samples for non-data plots',
253: edit_type => 'choice',
254: choices => ['100','200','500','1000','2000','5000']
255: },
256: align => {
257: default => 'middle',
258: test => sub {$_[0]=~/^(left|right|middle|center)$/},
259: description => 'Alignment for image in HTML',
260: edit_type => 'choice',
261: choices => ['left','right','middle','center']
262: },
263: texwidth => {
264: default => '93',
265: test => $int_test,
266: description => 'Width of plot when printed (mm)',
267: edit_type => 'entry',
268: size => '5'
269: },
270: texfont => {
271: default => '22',
272: test => $int_test,
273: description => 'Font size to use in TeX output (pts):',
274: edit_type => 'choice',
275: choices => [qw/8 10 12 14 16 18 20 22 24 26 28 30 32 34 36/],
276: },
277: plotcolor => {
278: default => 'monochrome',
279: test => sub {$_[0]=~/^(monochrome|color|colour)$/},
280: description => 'Color setting for printing:',
281: edit_type => 'choice',
282: choices => [qw/monochrome color colour/],
283: },
284: pattern => {
285: default => '',
286: test => $int_test,
287: description => 'Pattern value for boxes:',
288: edit_type => 'choice',
289: choices => [0,1,2,3,4,5,6]
290: },
291: solid => {
292: default => 0,
293: test => $real_test,
294: description => 'The density of fill style for boxes',
295: edit_type => 'entry',
296: size => '5'
297: },
298: fillstyle => {
299: default => 'empty',
300: test => sub {$_[0]=~/^(empty|solid|pattern)$/},
301: description => 'Filled style for boxes:',
302: edit_type => 'choice',
303: choices => ['empty','solid','pattern']
304: },
305: plottype => {
306: default => 'Cartesian',
307: test => sub {$_[0]=~/^(Polar|Cartesian)$/},
308: description => 'Plot type:',
309: edit_type => 'choice',
310: choices => ['Cartesian','Polar']
311: },
312: gridtype => {
313: default => 'Cartesian',
314: test => sub {$_[0]=~/^(Polar|Cartesian|Linear-Log|Log-Linear|Log-Log)$/},
315: description => 'Grid type:',
316: edit_type => 'choice',
317: choices => ['Cartesian','Polar','Linear-Log','Log-Linear','Log-Log']
318: },
319: lmargin => {
320: default => 'default',
321: test => sub {$_[0]=~/^(default|\d+)$/},
322: description => 'Left margin width (pts):',
323: edit_type => 'choice',
324: choices => $margin_choices,
325: },
326: rmargin => {
327: default => 'default',
328: test => sub {$_[0]=~/^(default|\d+)$/},
329: description => 'Right margin width (pts):',
330: edit_type => 'choice',
331: choices => $margin_choices,
332: },
333: tmargin => {
334: default => 'default',
335: test => sub {$_[0]=~/^(default|\d+)$/},
336: description => 'Top margin width (pts):',
337: edit_type => 'choice',
338: choices => $margin_choices,
339: },
340: bmargin => {
341: default => 'default',
342: test => sub {$_[0]=~/^(default|\d+)$/},
343: description => 'Bottom margin width (pts):',
344: edit_type => 'choice',
345: choices => $margin_choices,
346: },
347: boxwidth => {
348: default => '',
349: test => $real_test,
350: description => 'Width of boxes, default is auto',
351: edit_type => 'entry',
352: size => '5'
353: },
354: major_ticscale => {
355: default => '1',
356: test => $real_test,
357: description => 'Size of major tic marks (plot coordinates)',
358: edit_type => 'entry',
359: size => '5'
360: },
361: minor_ticscale => {
362: default => '0.5',
363: test => $real_test,
364: description => 'Size of minor tic mark (plot coordinates)',
365: edit_type => 'entry',
366: size => '5'
367: },
368: );
369:
370: my %key_defaults =
371: (
372: title => {
373: default => '',
374: test => $words_test,
375: description => 'Title of key',
376: edit_type => 'entry',
377: size => '40'
378: },
379: box => {
380: default => 'off',
381: test => $onoff_test,
382: description => 'Draw a box around the key?',
383: edit_type => 'onoff'
384: },
385: pos => {
386: default => 'top right',
387: test => $key_pos_test,
388: description => 'Position of the key on the plot',
389: edit_type => 'choice',
390: choices => ['top left','top right','bottom left','bottom right',
391: 'outside','below']
392: }
393: );
394:
395: my %label_defaults =
396: (
397: xpos => {
398: default => 0,
399: test => $real_test,
400: description => 'X position of label (graph coordinates)',
401: edit_type => 'entry',
402: size => '10'
403: },
404: ypos => {
405: default => 0,
406: test => $real_test,
407: description => 'Y position of label (graph coordinates)',
408: edit_type => 'entry',
409: size => '10'
410: },
411: justify => {
412: default => 'left',
413: test => sub {$_[0]=~/^(left|right|center)$/},
414: description => 'justification of the label text on the plot',
415: edit_type => 'choice',
416: choices => ['left','right','center']
417: },
418: rotate => {
419: default => 0,
420: test => $real_test,
421: description => 'Rotation of label (degrees)',
422: edit_type => 'entry',
423: size => '10',
424: },
425: zlayer => {
426: default => '',
427: test => sub {$_[0]=~/^(front|back)$/},
428: description => 'Z position of label',
429: edit_type => 'choice',
430: choices => ['front','back'],
431: },
432: );
433:
434: my @tic_edit_order = ('location','mirror','start','increment','end',
435: 'minorfreq');
436: my %tic_defaults =
437: (
438: location => {
439: default => 'border',
440: test => sub {$_[0]=~/^(border|axis)$/},
441: description => 'Location of major tic marks',
442: edit_type => 'choice',
443: choices => ['border','axis']
444: },
445: mirror => {
446: default => 'on',
447: test => $onoff_test,
448: description => 'Mirror tics on opposite axis?',
449: edit_type => 'onoff'
450: },
451: start => {
452: default => '-10.0',
453: test => $real_test,
454: description => 'Start major tics at',
455: edit_type => 'entry',
456: size => '10'
457: },
458: increment => {
459: default => '1.0',
460: test => $real_test,
461: description => 'Place a major tic every',
462: edit_type => 'entry',
463: size => '10'
464: },
465: end => {
466: default => ' 10.0',
467: test => $real_test,
468: description => 'Stop major tics at ',
469: edit_type => 'entry',
470: size => '10'
471: },
472: minorfreq => {
473: default => '0',
474: test => $int_test,
475: description => 'Number of minor tics per major tic mark',
476: edit_type => 'entry',
477: size => '10'
478: },
479: rotate => {
480: default => 'off',
481: test => $onoff_test,
482: description => 'Rotate tic label by 90 degrees if on',
483: edit_type => 'onoff'
484: }
485: );
486:
487: my @axis_edit_order = ('color','xmin','xmax','ymin','ymax','xformat', 'yformat', 'xzero', 'yzero');
488: my %axis_defaults =
489: (
490: color => {
491: default => 'x000000',
492: test => $color_test,
493: description => 'Color of grid lines (x000000)',
494: edit_type => 'entry',
495: size => '10',
496: class => 'colorchooser'
497: },
498: xmin => {
499: default => '-10.0',
500: test => $real_test,
501: description => 'Minimum x-value shown in plot',
502: edit_type => 'entry',
503: size => '10'
504: },
505: xmax => {
506: default => ' 10.0',
507: test => $real_test,
508: description => 'Maximum x-value shown in plot',
509: edit_type => 'entry',
510: size => '10'
511: },
512: ymin => {
513: default => '-10.0',
514: test => $real_test,
515: description => 'Minimum y-value shown in plot',
516: edit_type => 'entry',
517: size => '10'
518: },
519: ymax => {
520: default => ' 10.0',
521: test => $real_test,
522: description => 'Maximum y-value shown in plot',
523: edit_type => 'entry',
524: size => '10'
525: },
526: xformat => {
527: default => 'on',
528: test => sub {$_[0]=~/^(on|off|\d+(f|F|e|E))$/},
529: description => 'X-axis number formatting',
530: edit_type => 'choice',
531: choices => ['on', 'off', '2e', '2f'],
532: },
533: yformat => {
534: default => 'on',
535: test => sub {$_[0]=~/^(on|off|\d+(f|F|e|E))$/},
536: description => 'Y-axis number formatting',
537: edit_type => 'choice',
538: choices => ['on', 'off', '2e', '2f'],
539: },
540:
541: xzero => {
542: default => 'off',
543: test => sub {$_[0]=~/^(off|line|thick-line|dotted)$/},
544: description => 'Show x-zero (y=0) axis',
545: edit_type => 'choice',
546: choices => ['off', 'line', 'thick-line', 'dotted'],
547: },
548:
549: yzero => {
550: default => 'off',
551: test => sub {$_[0]=~/^(off|line|thick-line|dotted)$/},
552: description => 'Show y-zero (x=0) axis',
553: edit_type => 'choice',
554: choices => ['off', 'line', 'thick-line', 'dotted'],
555: },
556: );
557:
558:
559: my @curve_edit_order = ('color','name','linestyle','linewidth','linetype',
560: 'pointtype','pointsize','limit', 'arrowhead', 'arrowstyle',
561: 'arrowlength', 'arrowangle', 'arrowbackangle'
562: );
563:
564: my %curve_defaults =
565: (
566: color => {
567: default => 'x000000',
568: test => $color_test,
569: description => 'Color of curve (x000000)',
570: edit_type => 'entry',
571: size => '10',
572: class => 'colorchooser'
573: },
574: name => {
575: default => '',
576: test => $words_test,
577: description => 'Name of curve to appear in key',
578: edit_type => 'entry',
579: size => '20'
580: },
581: linestyle => {
582: default => 'lines',
583: test => $linestyle_test,
584: description => 'Plot with:',
585: edit_type => 'choice',
586: choices => [keys(%linestyles)]
587: },
588: linewidth => {
589: default => 1,
590: test => $int_test,
591: description => 'Line width (may not apply to all plot styles)',
592: edit_type => 'choice',
593: choices => [1,2,3,4,5,6,7,8,9,10]
594: },
595: linetype => {
596: default => 'solid',
597: test => sub {$_[0]=~/^(solid|dashed)$/},
598: description => 'Line type (may not apply to all plot styles)',
599: edit_type => 'choice',
600: choices => ['solid', 'dashed']
601: },
602: pointsize => {
603: default => 1,
604: test => $pos_real_test,
605: description => 'Point size (may not apply to all plot styles)',
606: edit_type => 'entry',
607: size => '5'
608: },
609: pointtype => {
610: default => 1,
611: test => $int_test,
612: description => 'Point type (may not apply to all plot styles)',
613: edit_type => 'choice',
614: choices => [0,1,2,3,4,5,6]
615: },
616: limit => {
617: default => 'closed',
618: test => sub {$_[0]=~/^(above|below|closed|x1|x2|y1|y2)$/},
619: description => 'Point to fill -- for filledcurves',
620: edit_type => 'choice',
621: choices => ['above', 'below', 'closed','x1','x2','y1','y2']
622: },
623: arrowhead => {
624: default => 'head',
625: test => $arrowhead_test,
626: description => 'Vector arrow head type',
627: edit_type => 'choice',
628: choices => ['nohead', 'head', 'heads']
629: },
630: arrowstyle => {
631: default => 'filled',
632: test => $arrowstyle_test,
633: description => 'Vector arrow head style',
634: edit_type => 'choice',
635: choices => ['filled', 'empty', 'nofilled']
636: },
637: arrowlength => {
638: default => 0.02,
639: test => $pos_real_test,
640: description => "Length of vector arrow (only applies to vector plots)",
641: edit_type => 'entry',
642: size => '5'
643: },
644: arrowangle => {
645: default => 10.0,
646: test => $degree_test,
647: description => 'Angle of arrow branches to arrow body (only applies to vector plots)',
648: edit_type => 'entry',
649: size => '5'
650: },
651:
652: arrowbackangle => {
653: default => 90.0,
654: test => $degree_test,
655: descripton => 'Angle of arrow back lines to branches.',
656: edit_type => 'entry',
657: size => '5'
658: }
659:
660: );
661:
662: ###################################################################
663: ## ##
664: ## parsing and edit rendering ##
665: ## ##
666: ###################################################################
667:
668: undef %Apache::lonplot::plot;
669: my (%key,%axis,$title,$xlabel,$ylabel,@labels,@curves,%xtics,%ytics);
670:
671: my $current_tics; # Reference to the current tick hash
672:
673: sub start_gnuplot {
674: undef(%Apache::lonplot::plot); undef(%key); undef(%axis);
675: undef($title); undef($xlabel); undef($ylabel);
676: undef(@labels); undef(@curves);
677: undef(%xtics); undef(%ytics);
678: #
679: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
680: my $result='';
681: &Apache::lonxml::register('Apache::lonplot',
682: ('title','xlabel','ylabel','key','axis','label','curve',
683: 'xtics','ytics'));
684: push (@Apache::lonxml::namespace,'lonplot');
685: if ($target eq 'web' || $target eq 'tex') {
686: &get_attributes(\%Apache::lonplot::plot,\%gnuplot_defaults,$parstack,$safeeval,
687: $tagstack->[-1]);
688: } elsif ($target eq 'edit') {
689: $result .= &Apache::edit::tag_start($target,$token,'GnuPlot');
690: $result .= &edit_attributes($target,$token,\%gnuplot_defaults,
691: \@gnuplot_edit_order)
692: .&Apache::edit::end_row()
693: .&Apache::edit::start_spanning_row();
694: } elsif ($target eq 'modified') {
695: my $constructtag=&Apache::edit::get_new_args
696: ($token,$parstack,$safeeval,keys(%gnuplot_defaults));
697:
698: if ($constructtag) {
699: #
700: # The color chooser does not prepent x to the color values
701: # Do that here:
702: #
703: foreach my $attribute ('bgcolor', 'fgcolor') {
704: my $value = $token->[2]{$attribute};
705: if (defined $value && !($value =~ /^x/)) {
706: $token->[2]{$attribute} = 'x' . $value;
707: }
708: }
709: $result = &Apache::edit::rebuild_tag($token);
710: }
711: }
712: return $result;
713: }
714:
715: sub end_gnuplot {
716: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
717: pop @Apache::lonxml::namespace;
718: &Apache::lonxml::deregister('Apache::lonplot',
719: ('title','xlabel','ylabel','key','axis','label','curve'));
720: my $result = '';
721: my $randnumber;
722: my $tmpdir =LONCAPA::tempdir(); # Where temporary files live:
723:
724: # need to call rand everytime start_script would evaluate, as the
725: # safe space rand number generator and the global rand generator
726: # are not separate
727: if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
728: $target eq 'answer') {
729: $randnumber=int(rand(1000));
730: }
731: if ($target eq 'web' || $target eq 'tex') {
732: &check_inputs(); # Make sure we have all the data we need
733: ##
734: ## Determine filename
735: my $filename = $env{'user.name'}.'_'.$env{'user.domain'}.
736: '_'.time.'_'.$$.$randnumber.'_plot';
737: ## Write the plot description to the file
738: &write_gnuplot_file($tmpdir,$filename,$target);
739: $filename = &escape($filename);
740: ## return image tag for the plot
741: if ($target eq 'web') {
742: my $srcatt = "src=\"/cgi-bin/plot.$weboutputformat?file=$filename.data\"";
743: my $widthatt = "width=\"$Apache::lonplot::plot{'width'}\"";
744: my $heightatt = "height=\"$Apache::lonplot::plot{'height'}\"";
745: my $alignatt = "align=\"$Apache::lonplot::plot{'align'}\"";
746: my $altatt = "alt=\"$Apache::lonplot::plot{'alttag'}\"";
747: if ($Apache::lonplot::plot{'align'} eq 'center') {
748: $result .= '<div style="text-align:center">'.
749: "<img $srcatt $widthatt $heightatt $altatt>".
750: "</div>\n";
751:
752: } else {
753: $result .= "<img $srcatt $widthatt $heightatt $alignatt $altatt>";
754: }
755: } elsif ($target eq 'tex') {
756: &Apache::lonxml::debug(" gnuplot wid = $Apache::lonplot::plot{'width'}");
757: &Apache::lonxml::debug(" gnuplot ht = $Apache::lonplot::plot{'height'}");
758: #might be inside the safe space, register the URL for later
759: &Apache::lonxml::register_ssi("/cgi-bin/plot.gif?file=$filename.data&output=eps");
760: $result = "%DYNAMICIMAGE:$Apache::lonplot::plot{'width'}:$Apache::lonplot::plot{'height'}:$Apache::lonplot::plot{'texwidth'}\n";
761: $result .= '\graphicspath{{'.$tmpdir.'}}'."\n";
762: if ($Apache::lonplot::plot{'align'} eq 'center') {
763: $result .= '\begin{center}';
764: }
765: $result .= '\includegraphics[width='.$Apache::lonplot::plot{'texwidth'}.' mm]{'.&unescape($filename).'.eps}';
766: if ($Apache::lonplot::plot{'align'} eq 'center') {
767: $result .= '\end{center}';
768: }
769: }
770: } elsif ($target eq 'edit') {
771: $result.=&Apache::edit::tag_end($target,$token);
772: }
773: return $result;
774: }
775:
776:
777: ##--------------------------------------------------------------- xtics
778: sub start_xtics {
779: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
780: my $result='';
781: if ($target eq 'web' || $target eq 'tex') {
782: &get_attributes(\%xtics,\%tic_defaults,$parstack,$safeeval,
783: $tagstack->[-1]);
784: $current_tics = \%xtics;
785: &Apache::lonxml::register('Apache::lonplot', 'tic');
786: } elsif ($target eq 'edit') {
787: $result .= &Apache::edit::tag_start($target,$token,'xtics');
788: $result .= &edit_attributes($target,$token,\%tic_defaults,
789: \@tic_edit_order);
790: } elsif ($target eq 'modified') {
791: my $constructtag=&Apache::edit::get_new_args
792: ($token,$parstack,$safeeval,keys(%tic_defaults));
793: if ($constructtag) {
794: $result = &Apache::edit::rebuild_tag($token);
795: }
796: }
797: return $result;
798: }
799:
800: sub end_xtics {
801: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
802: my $result = '';
803: if ($target eq 'web' || $target eq 'tex') {
804: &Apache::lonxml::deregister('Apache::lonplot', 'tic');
805: } elsif ($target eq 'edit') {
806: $result.=&Apache::edit::tag_end($target,$token);
807: }
808: return $result;
809: }
810:
811: ##--------------------------------------------------------------- ytics
812: sub start_ytics {
813: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
814: my $result='';
815: if ($target eq 'web' || $target eq 'tex') {
816: &get_attributes(\%ytics,\%tic_defaults,$parstack,$safeeval,
817: $tagstack->[-1]);
818: $current_tics = \%ytics;
819: &Apache::lonxml::register('Apache::lonplot', 'tic');
820: } elsif ($target eq 'edit') {
821: $result .= &Apache::edit::tag_start($target,$token,'ytics');
822: $result .= &edit_attributes($target,$token,\%tic_defaults,
823: \@tic_edit_order);
824: } elsif ($target eq 'modified') {
825: my $constructtag=&Apache::edit::get_new_args
826: ($token,$parstack,$safeeval,keys(%tic_defaults));
827: if ($constructtag) {
828: $result = &Apache::edit::rebuild_tag($token);
829: }
830: }
831: return $result;
832: }
833:
834: sub end_ytics {
835: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
836: my $result = '';
837: if ($target eq 'web' || $target eq 'tex') {
838: &Apache::lonxml::deregister('Apache::lonplot', 'tic');
839: } elsif ($target eq 'edit') {
840: $result.=&Apache::edit::tag_end($target,$token);
841: }
842: return $result;
843: }
844:
845:
846: ##----------------------------------------------------------------
847: #
848: # Tic handling:
849: # The <tic> tag allows users to specify exact Tic positions and labels
850: # for each axis. In this version we only support level 0 tics (major tic).
851: # Each tic has associated with it a position and a label
852: # $current_tics is a reference to the current tick description hash.
853: # We add elements to an array in that has: ticspecs whose elements
854: # are 'pos' - the tick position and 'label' - the tic label.
855: #
856:
857:
858: sub start_tic {
859: my ($target, $token, $tagstack, $parstack, $parser, $safeeval, $style) = @_;
860:
861: my $result = '';
862: if ($target eq 'web' || $target eq 'tex') {
863: my $tic_location = &Apache::lonxml::get_param('location', $parstack, $safeeval);
864: my $tic_label = &Apache::lonxml::get_all_text('/tic', $parser);
865:
866: # Tic location must e a real:
867:
868: if (!&$real_test($tic_location)) {
869: &Apache::lonxml::warning("Tic location: $tic_location must be a real number");
870: } else {
871:
872: if (!defined $current_tics->{'ticspecs'}) {
873: $current_tics->{'ticspecs'} = [];
874: }
875: my $ticspecs = $current_tics->{'ticspecs'};
876: push (@$ticspecs, {'pos' => $tic_location, 'label' => $tic_label});
877: }
878: }
879:
880: return $result;
881: }
882:
883: sub end_tic {
884: return '';
885: }
886:
887: ##-----------------------------------------------------------------font
888: my %font_properties =
889: (
890: 'classic' => {
891: face => 'classic',
892: file => 'DejaVuSansMono-Bold',
893: printname => 'Helvetica',
894: tex_no_file => 1,
895: },
896: 'sans-serif' => {
897: face => 'sans-serif',
898: file => 'DejaVuSans',
899: printname => 'DejaVuSans',
900: },
901: 'serif' => {
902: face => 'serif',
903: file => 'DejaVuSerif',
904: printname => 'DejaVuSerif',
905: },
906: );
907:
908: sub get_font {
909: my ($target) = @_;
910: my ($size, $selected_font);
911:
912: if ( $Apache::lonplot::plot{'font'} =~ /^(small|medium|large)/) {
913: $selected_font = $font_properties{'classic'};
914: if ( $Apache::lonplot::plot{'font'} eq 'small') {
915: $size = '5';
916: } elsif ( $Apache::lonplot::plot{'font'} eq 'medium') {
917: $size = '9';
918: } elsif ( $Apache::lonplot::plot{'font'} eq 'large') {
919: $size = '11';
920: } else {
921: $size = '9';
922: }
923: } else {
924: $size = $Apache::lonplot::plot{'font'};
925: $selected_font = $font_properties{$Apache::lonplot::plot{'fontface'}};
926: }
927: if ($target eq 'tex' && defined($Apache::lonplot::plot{'texfont'})) {
928: # $selected_font = $font_properties{'classic'};
929: $size = $Apache::lonplot::plot{'texfont'};
930: }
931: return ($size, $selected_font);
932: }
933:
934: ##----------------------------------------------------------------- key
935: sub start_key {
936: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
937: my $result='';
938: if ($target eq 'web' || $target eq 'tex') {
939: &get_attributes(\%key,\%key_defaults,$parstack,$safeeval,
940: $tagstack->[-1]);
941: } elsif ($target eq 'edit') {
942: $result .= &Apache::edit::tag_start($target,$token,'Plot Key');
943: $result .= &edit_attributes($target,$token,\%key_defaults);
944: } elsif ($target eq 'modified') {
945: my $constructtag=&Apache::edit::get_new_args
946: ($token,$parstack,$safeeval,keys(%key_defaults));
947: if ($constructtag) {
948: $result = &Apache::edit::rebuild_tag($token);
949: }
950: }
951: return $result;
952: }
953:
954: sub end_key {
955: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
956: my $result = '';
957: if ($target eq 'web' || $target eq 'tex') {
958: } elsif ($target eq 'edit') {
959: $result.=&Apache::edit::tag_end($target,$token);
960: }
961: return $result;
962: }
963:
964: sub parse_label {
965: my ($target,$text) = @_;
966: my $parser=HTML::LCParser->new(\$text);
967: my $result;
968: while (my $token=$parser->get_token) {
969: if ($token->[0] eq 'S') {
970: if ($token->[1] eq 'sub') {
971: $result .= '_{';
972: } elsif ($token->[1] eq 'sup') {
973: $result .= '^{';
974: } else {
975: $result .= $token->[4];
976: }
977: } elsif ($token->[0] eq 'E') {
978: if ($token->[1] eq 'sub'
979: || $token->[1] eq 'sup') {
980: $result .= '}';
981: } else {
982: $result .= $token->[2];
983: }
984: } elsif ($token->[0] eq 'T') {
985: $result .= &replace_entities($target,$token->[1]);
986: }
987: }
988: return $result;
989: }
990:
991: #
992: # Note that there are severe restrictions on font selection in the
993: # ps driver now. later in life Gnuplot is supposed to support
994: # utf-8 fonts in the posts script driver. When this happens,
995: # the tex entries with comments that include the word <FIX>
996: # should be changed to print the correct glyphs rather than some
997: # approximation or fallback of what is intended.
998:
999: my %lookup =
1000: ( # Greek alphabet:
1001:
1002: '(Alpha|#913)' => {'tex' => '{/Symbol A}', 'web' => "\x{391}"},
1003: '(Beta|#914)' => {'tex' => '{/Symbol B}', 'web' => "\x{392}"},
1004: '(Chi|#935)' => {'tex' => '{/Symbol C}', 'web' => "\x{3A7}"},
1005: '(Delta|#916)' => {'tex' => '{/Symbol D}', 'web' => "\x{394}"},
1006: '(Epsilon|#917)' => {'tex' => '{/Symbol E}', 'web' => "\x{395}"},
1007: '(Phi|#934)' => {'tex' => '{/Symbol F}', 'web' => "\x{3A6}"},
1008: '(Gamma|#915)' => {'tex' => '{/Symbol G}', 'web' => "\x{393}"},
1009: '(Eta|#919)' => {'tex' => '{/Symbol H}', 'web' => "\x{397}"},
1010: '(Iota|#921)' => {'tex' => '{/Symbol I}', 'web' => "\x{399}"},
1011: '(Kappa|#922)' => {'tex' => '{/Symbol K}', 'web' => "\x{39A}"},
1012: '(Lambda|#923)' => {'tex' => '{/Symbol L}', 'web' => "\x{39B}"},
1013: '(Mu|#924)' => {'tex' => '{/Symbol M}', 'web' => "\x{39C}"},
1014: '(Nu|#925)' => {'tex' => '{/Symbol N}', 'web' => "\x{39D}"},
1015: '(Omicron|#927)' => {'tex' => '{/Symbol O}', 'web' => "\x{39F}"},
1016: '(Pi|#928)' => {'tex' => '{/Symbol P}', 'web' => "\x{3A0}"},
1017: '(Theta|#920)' => {'tex' => '{/Symbol Q}', 'web' => "\x{398}"},
1018: '(Rho|#929)' => {'tex' => '{/Symbol R}', 'web' => "\x{3A1}"},
1019: '(Sigma|#931)' => {'tex' => '{/Symbol S}', 'web' => "\x{3A3}"},
1020: '(Tau|#932)' => {'tex' => '{/Symbol T}', 'web' => "\x{3A4}"},
1021: '(Upsilon|#933)' => {'tex' => '{/Symbol U}', 'web' => "\x{3A5}"},
1022: '(Omega|#937)' => {'tex' => '{/Symbol W}', 'web' => "\x{3A9}"},
1023: '(Xi|#926)' => {'tex' => '{/Symbol X}', 'web' => "\x{39E}"},
1024: '(Psi|#936)' => {'tex' => '{/Symbol Y}', 'web' => "\x{3A8}"},
1025: '(Zeta|#918)' => {'tex' => '{/Symbol Z}', 'web' => "\x{396}"},
1026: '(alpha|#945)' => {'tex' => '{/Symbol a}', 'web' => "\x{3B1}"},
1027: '(beta|#946)' => {'tex' => '{/Symbol b}', 'web' => "\x{3B2}"},
1028: '(chi|#967)' => {'tex' => '{/Symbol c}', 'web' => "\x{3C7}"},
1029: '(delta|#948)' => {'tex' => '{/Symbol d}', 'web' => "\x{3B4}"},
1030: '(epsilon|#949)' => {'tex' => '{/Symbol e}', 'web' => "\x{3B5}"},
1031: '(phi|#966)' => {'tex' => '{/Symbol f}', 'web' => "\x{3C6}"},
1032: '(gamma|#947)' => {'tex' => '{/Symbol g}', 'web' => "\x{3B3}"},
1033: '(eta|#951)' => {'tex' => '{/Symbol h}', 'web' => "\x{3B7}"},
1034: '(iota|#953)' => {'tex' => '{/Symbol i}', 'web' => "\x{3B9}"},
1035: '(kappa|#954)' => {'tex' => '{/Symbol k}', 'web' => "\x{3BA}"},
1036: '(lambda|#955)' => {'tex' => '{/Symbol k}', 'web' => "\x{3BB}"},
1037: '(mu|#956)' => {'tex' => '{/Symbol m}', 'web' => "\x{3BC}"},
1038: '(nu|#957)' => {'tex' => '{/Symbol n}', 'web' => "\x{3BD}"},
1039: '(omicron|#959)' => {'tex' => '{/Symbol o}', 'web' => "\x{3BF}"},
1040: '(pi|#960)' => {'tex' => '{/Symbol p}', 'web' => "\x{3C0}"},
1041: '(theta|#952)' => {'tex' => '{/Symbol q}', 'web' => "\x{3B8}"},
1042: '(rho|#961)' => {'tex' => '{/Symbol r}', 'web' => "\x{3C1}"},
1043: '(sigma|#963)' => {'tex' => '{/Symbol s}', 'web' => "\x{3C3}"},
1044: '(tau|#964)' => {'tex' => '{/Symbol t}', 'web' => "\x{3C4}"},
1045: '(upsilon|#965)' => {'tex' => '{/Symbol u}', 'web' => "\x{3C5}"},
1046: '(omega|#969)' => {'tex' => '{/Symbol w}', 'web' => "\x{3C9}"},
1047: '(xi|#958)' => {'tex' => '{/Symbol x}', 'web' => "\x{3BE}"},
1048: '(psi|#968)' => {'tex' => '{/Symbol y}', 'web' => "\x{3C8}"},
1049: '(zeta|#950)' => {'tex' => '{/Symbol z}', 'web' => "\x{3B6}"},
1050: '(thetasym|#977)' => {'tex' => '{/Symbol \165}', 'web' => "\x{3d1}"},
1051: '(upsih|#978)' => {'tex' => '{/Symbol \241}', 'web' => "\x{3d2}"},
1052: '(piv|#982)' => {'tex' => '{/Symbol \166}', 'web' => "\x{3d6}"},
1053:
1054:
1055: # Punctuation:
1056:
1057: '(quot|#034)' => {'tex' => '\42', 'web' => '\42'},
1058: '(amp|#038)' => {'tex' => '\46', 'web' => '\46'},
1059: '(lt|#060)' => {'tex' => '\74', 'web' => '\74'},
1060: '(gt|#062)' => {'tex' => '\76', 'web' => '\76'},
1061: '#131' => {'tex' => '{/Symbol \246}', 'web' => "\x{192}"},
1062: '#132' => {'tex' => '{/Text \271}', 'web' => "\x{201e}"},
1063: '#133' => {'tex' => '{/Symbol \274}', 'web'=> "\x{2026}"},
1064: '#134' => {'tex' => '{/Text \262}', 'web' => "\x{2020}"},
1065: '#135' => {'tex' => '{/Text \263}', 'web' => "\x{2021}"},
1066: '#136' => {'tex' => '\\\\^', 'web' => '\\\\^'},
1067: '#137' => {'tex' => '%o', 'web' => "\x{2030}"}, # Per Mille <FIX>
1068: '#138' => {'tex' => 'S', 'web' => "\x{160}"}, # S-Caron <FIX>
1069: '#139' => {'tex' => '<', 'web' => '<'},
1070: '#140' => {'tex' => 'AE', 'web' => "\x{152}"}, # AE ligature <FIX>
1071: '#145' => {'tex' => '\140', 'web' => "\x{2018}"},
1072: '#146' => {'tex' => '\47', 'web' => "\x{2019}"},
1073: '#147' => {'tex' => '\140\140', 'web' => "\x{201c}"}, # Left " <FIX>
1074: '#148' => {'tex' => '\47\47', 'web' => '\\"'}, # Right " <FIX>
1075: '#149' => {'tex' => '{/Symbol \267}', 'web' => "\x{2022}"},
1076: '#150' => {'tex' => '{/Text \55}', 'web' => "\x{2013}"}, # en dash
1077: '#151' => {'tex' => '{/Symbol \55}', 'web' => "\x{2014}"}, # em dash
1078: '#152' => {'tex' => '\\\\~', 'web' => '\\\\~'},
1079: '#153' => {'tex' => '{/Symbol \324}', 'web' => "\x{2122}"}, # trademark
1080:
1081: # Accented letters, and other furreign language glyphs.
1082:
1083: '#154' => {'tex' => 's', 'web' => "\x{161}"}, # small s-caron no ps.
1084: '#155' => {'tex' => '>', 'web' => '\76'}, # >
1085: '#156' => {'tex' => '{/Text \366}', 'web' => "\x{153}"}, # oe ligature.<FIX>
1086: '#159', => {'tex' => 'Y', 'web' => "\x{178}"}, # Y-umlaut - can't print <FIX>
1087: '(nbsp|#160)' => {'tex' => ' ', 'web' => ' '}, # non breaking space.
1088: '(iexcl|#161)' => {'tex' => '{/Text \241}', 'web' => "\x{a1}"}, # inverted !
1089: '(cent|#162)' => {'tex' => '{/Text \242}', 'web' => "\x{a2}"}, # Cent currency.
1090: '(pound|#163)' => {'tex' => '{/Text \243}', 'web' => "\x{a3}"}, # GB Pound currency.
1091: '(curren|#164)' => {'tex' => '{/ZapfDingbats \161}','web' => "\x{a4}"}, # Generic currency symb. <FIX>
1092: '(yen|#165)' => {'tex' => '{/Text \245}', 'web' => "\x{a5}"}, # Yen currency.
1093: '(brvbar|#166)' => {'tex' => '{/Symbol \174}', 'web' => "\x{a6}"}, # Broken vert bar no print.
1094: '(sect|#167)' => {'tex' => '{\247}', 'web' => "\x{a7}"}, # Section symbol.
1095: '(uml|#168)' => {'tex' => '{\250}', 'web' => "\x{a8}"}, # 'naked' umlaut.
1096: '(copy|#169)' => {'tex' => '{/Symbol \343}', 'web' => "\x{a9}"}, # Copyright symbol.
1097: '(ordf|#170)' => {'tex' => '{/Text \343}', 'web' => "\x{aa}"}, # Feminine ordinal.
1098: '(laquo|#171)' => {'tex' => '{/Text \253}', 'web' => "\x{ab}"}, # << quotes.
1099: '(not|#172)' => {'tex' => '\254', 'web' => "\x{ac}"}, # Logical not.
1100: '(shy|#173)' => {'tex' => '\255', 'web' => "\x{ad}"}, # soft hyphen.
1101: '(reg|#174)' => {'tex' => '{/Symbol \342}', 'web' => "\x{ae}"}, # Registered tm.
1102: '(macr|#175)' => {'tex' => '^{\255}', 'web' => "\x{af}"}, # 'naked' macron (overbar).
1103: '(deg|#176)' => {'tex' => '{/Text \260}', 'web' => "\x{b0}"}, # Degree symbo..`
1104: '(plusmn|#177)' => {'tex' => '{/Symbol \261}', 'web' => "\x{b1}"}, # +/- symbol.
1105: '(sup2|#178)' => {'tex' => '^2', 'web' => "\x{b2}"}, # Superscript 2.
1106: '(sup3|#179)' => {'tex' => '^3', 'web' => "\x{b3}"}, # Superscript 3.
1107: '(acute|#180)' => {'tex' => '{/Text \222}', 'web' => "\x{b4}"}, # 'naked' acute accent.
1108: '(micro|#181)' => {'tex' => '{/Symbol \155}', 'web' => "\x{b5}"}, # Micro (small mu).
1109: '(para|#182)' => {'tex' => '{/Text \266}', 'web' => "\x{b6}"}, # Paragraph symbol.
1110: '(middot|#183)' => {'tex' => '\267', 'web' => "\x{b7}"}, # middle dot
1111: '(cedil|#184)' => {'tex' => '\233', 'web' => "\x{b8}"}, # 'naked' cedilla.
1112: '(sup1|#185)' => {'tex' => '^1', 'web' => "\x{b9}"}, # superscript 1.
1113: '(ordm|#186)' => {'tex' => '{\260}', 'web' => "\x{ba}"}, # masculine ordinal.
1114: '(raquo|#187)', => {'tex' => '\273', 'web' => "\x{bb}"}, # Right angle quotes.
1115: '(frac14|#188)' => {'tex' => '\274', 'web' => "\x{bc}"}, # 1/4.
1116: '(frac12|#189)' => {'tex' => '\275', 'web' => "\x{bd}"}, # 1/2.
1117: '(frac34|#190)' => {'tex' => '\276', 'web' => "\x{be}"}, # 3/4
1118: '(iquest|#191)' => {'tex' => '{/Text \277}', 'web' => "\x{bf}"}, # Inverted ?
1119: '(Agrave|#192)' => {'tex' => '\300', 'web' => "\x{c0}"}, # A Grave.
1120: '(Aacute|#193)' => {'tex' => '\301', 'web' => "\x{c1}"}, # A Acute.
1121: '(Acirc|#194)' => {'tex' => '\302', 'web' => "\x{c2}"}, # A Circumflex.
1122: '(Atilde|#195)' => {'tex' => '\303', 'web' => "\x{c3}"}, # A tilde.
1123: '(Auml|#196)' => {'tex' => '\304', 'web' => "\x{c4}"}, # A umlaut.
1124: '(Aring|#197)' => {'tex' => '\305', 'web' => "\x{c5}"}, # A ring.
1125: '(AElig|#198)' => {'tex' => '\306', 'web' => "\x{c6}"}, # AE ligature.
1126: '(Ccedil|#199)' => {'tex' => '\307', 'web' => "\x{c7}"}, # C cedilla
1127: '(Egrave|#200)' => {'tex' => '\310', 'web' => "\x{c8}"}, # E Accent grave.
1128: '(Eacute|#201)' => {'tex' => '\311', 'web' => "\x{c9}"}, # E acute accent.
1129: '(Ecirc|#202)' => {'tex' => '\312', 'web' => "\x{ca}"}, # E Circumflex.
1130: '(Euml|#203)' => {'tex' => '\313', 'web' => "\x{cb}"}, # E umlaut.
1131: '(Igrave|#204)' => {'tex' => '\314', 'web' => "\x{cc}"}, # I grave accent.
1132: '(Iacute|#205)' => {'tex' => '\315', 'web' => "\x{cd}"}, # I acute accent.
1133: '(Icirc|#206)' => {'tex' => '\316', 'web' => "\x{ce}"}, # I circumflex.
1134: '(Iuml|#207)' => {'tex' => '\317', 'web' => "\x{cf}"}, # I umlaut.
1135: '(ETH|#208)' => {'tex' => '\320', 'web' => "\x{d0}"}, # Icelandic Cap eth.
1136: '(Ntilde|#209)' => {'tex' => '\321', 'web' => "\x{d1}"}, # Ntilde (enyan).
1137: '(Ograve|#210)' => {'tex' => '\322', 'web' => "\x{d2}"}, # O accent grave.
1138: '(Oacute|#211)' => {'tex' => '\323', 'web' => "\x{d3}"}, # O accent acute.
1139: '(Ocirc|#212)' => {'tex' => '\324', 'web' => "\x{d4}"}, # O circumflex.
1140: '(Otilde|#213)' => {'tex' => '\325', 'web' => "\x{d5}"}, # O tilde.
1141: '(Ouml|#214)' => {'tex' => '\326', 'web' => "\x{d6}"}, # O umlaut.
1142: '(times|#215)' => {'tex' => '\327', 'web' => "\x{d7}"}, # Times symbol.
1143: '(Oslash|#216)' => {'tex' => '\330', 'web' => "\x{d8}"}, # O slash.
1144: '(Ugrave|#217)' => {'tex' => '\331', 'web' => "\x{d9}"}, # U accent grave.
1145: '(Uacute|#218)' => {'tex' => '\332', 'web' => "\x{da}"}, # U accent acute.
1146: '(Ucirc|#219)' => {'tex' => '\333', 'web' => "\x{db}"}, # U circumflex.
1147: '(Uuml|#220)' => {'tex' => '\334', 'web' => "\x{dc}"}, # U umlaut.
1148: '(Yacute|#221)' => {'tex' => '\335', 'web' => "\x{dd}"}, # Y accent acute.
1149: '(THORN|#222)' => {'tex' => '\336', 'web' => "\x{de}"}, # Icelandic thorn.
1150: '(szlig|#223)' => {'tex' => '\337', 'web' => "\x{df}"}, # German sharfes s.
1151: '(agrave|#224)' => {'tex' => '\340', 'web' => "\x{e0}"}, # a accent grave.
1152: '(aacute|#225)' => {'tex' => '\341', 'web' => "\x{e1}"}, # a grave.
1153: '(acirc|#226)' => {'tex' => '\342', 'web' => "\x{e2}"}, # a circumflex.
1154: '(atilde|#227)' => {'tex' => '\343', 'web' => "\x{e3}"}, # a tilde.
1155: '(auml|#228)' => {'tex' => '\344', 'web' => "\x{e4}"}, # a umlaut
1156: '(aring|#229)' => {'tex' => '\345', 'web' => "\x{e5}"}, # a ring on top.
1157: '(aelig|#230)' => {'tex' => '\346', 'web' => "\x{e6}"}, # ae ligature.
1158: '(ccedil|#231)' => {'tex' => '\347', 'web' => "\x{e7}"}, # C cedilla
1159: '(egrave|#232)' => {'tex' => '\350', 'web' => "\x{e8}"}, # e accent grave.
1160: '(eacute|#233)' => {'tex' => '\351', 'web' => "\x{e9}"}, # e accent acute.
1161: '(ecirc|#234)' => {'tex' => '\352', 'web' => "\x{ea}" }, # e circumflex.
1162: '(euml|#235)' => {'tex' => '\353', 'web' => "\x{eb}"}, # e umlaut.
1163: '(igrave|#236)' => {'tex' => '\354', 'web' => "\x{ec}"}, # i grave.
1164: '(iacute|#237)' => {'tex' => '\355', 'web' => "\x{ed}"}, # i acute.
1165: '(icirc|#238)' => {'tex' => '\356', 'web' => "\x{ee}"}, # i circumflex.
1166: '(iuml|#239)' => {'tex' => '\357', 'web' => "\x{ef}"}, # i umlaut.
1167: '(eth|#240)' => {'tex' => '\360', 'web' => "\x{f0}"}, # Icelandic eth.
1168: '(ntilde|#241)' => {'tex' => '\361', 'web' => "\x{f1}"}, # n tilde.
1169: '(ograve|#242)' => {'tex' => '\362', 'web' => "\x{f2}"}, # o grave.
1170: '(oacute|#243)' => {'tex' => '\363', 'web' => "\x{f3}"}, # o acute.
1171: '(ocirc|#244)' => {'tex' => '\364', 'web' => "\x{f4}"}, # o circumflex.
1172: '(otilde|#245)' => {'tex' => '\365', 'web' => "\x{f5}"}, # o tilde.
1173: '(ouml|#246)' => {'tex' => '\366', 'web' => "\x{f6}"}, # o umlaut.
1174: '(divide|#247)' => {'tex' => '\367', 'web' => "\x{f7}"}, # division symbol
1175: '(oslash|#248)' => {'tex' => '\370', 'web' => "\x{f8}"}, # o slashed.
1176: '(ugrave|#249)' => {'tex' => '\371', 'web' => "\x{f9}"}, # u accent grave.
1177: '(uacute|#250)' => {'tex' => '\372', 'web' => "\x{fa}"}, # u acute.
1178: '(ucirc|#251)' => {'tex' => '\373', 'web' => "\x{fb}"}, # u circumflex.
1179: '(uuml|#252)' => {'tex' => '\374', 'web' => "\x{fc}"}, # u umlaut.
1180: '(yacute|#253)' => {'tex' => '\375', 'web' => "\x{fd}"}, # y acute accent.
1181: '(thorn|#254)' => {'tex' => '\376', 'web' => "\x{fe}"}, # small thorn (icelandic).
1182: '(yuml|#255)' => {'tex' => '\377', 'web' => "\x{ff}"}, # y umlaut.
1183:
1184: # Latin extended A entities:
1185:
1186: '(OElig|#338)' => {'tex' => '{/Text \326}', 'web' => "\x{152}"}, # OE ligature.
1187: '(oelig|#339)' => {'tex' => '{/Text \366}', 'web' => "\x{153}"}, # oe ligature.
1188: '(Scaron|#352)' => {'tex' => 'S', 'web' => "\x{160}"}, # S caron no printable.
1189: '(scaron|#353)' => {'tex' => 's', 'web' => "\x{161}"}, # s caron no printable.
1190: '(Yuml|#376)' => {'tex' => 'Y', 'web' => "\x{178}"}, # Y umlaut - no printable.
1191:
1192: # Latin extended B.
1193:
1194: '(fnof|#402)' => {'tex' =>'{/Symbol \246}', 'web' => "\x{192}"}, # f with little hook.
1195:
1196: # Standalone accents:
1197:
1198: '(circ|#710)' => {'tex' => '^', 'web' => '^'}, # circumflex.
1199: '(tilde|#732)' => {'tex' => '~', 'web' => '~'}, # tilde.
1200:
1201: # General punctuation. We're not able to make a distinction between
1202: # the various length spacings in the print version. (e.g. en/em/thin).
1203: # the various joiners will be empty strings in the print version too.
1204:
1205:
1206: '(ensp|#8194)' => {'tex' => ' ', 'web' => "\x{2002}"}, # en space.
1207: '(emsp|#8195)' => {'tex' => ' ', 'web' => "\x{2003}"}, # em space.
1208: '(thinsp|#8201)' => {'tex' => ' ', 'web' => "\x{2009}"}, # thin space.
1209: '(zwnj|#8204)' => {'tex' => ' ', 'web' => "\x{200c}"}, # Zero width non joiner.
1210: '(zwj|#8205)' => {'tex' => ' ', 'web' => "\x{200d}"}, # Zero width joiner.
1211: '(lrm|#8206)' => {'tex' => ' ', 'web' => "\x{200e}"}, # Left to right mark
1212: '(rlm|#8207)' => {'tex' => ' ', 'web' => "\x{200f}"}, # right to left mark.
1213: '(ndash|#8211)' => {'tex' => '{/Text \55}', 'web' => "\x{2013}"}, # en dash.
1214: '(mdash|#8212)' => {'tex' => '{/Symbol \55}', 'web' => "\x{2014}"}, # em dash.
1215: '(lsquo|#8216)' => {'tex' => '{/Text \140}', 'web' => "\x{2018}"}, # Left single quote.
1216: '(rsquo|#8217)' => {'tex' => '\47', 'web' => "\x{2019}"}, # Right single quote.
1217: '(sbquo|#8218)' => {'tex' => '\54', 'web' => "\x{201a}"}, # Single low-9 quote.
1218: '(ldquo|#8220)' => {'tex' => '\42', 'web' => "\x{201c}"}, # Left double quote.
1219: '(rdquo|#8221)' => {'tex' => '\42', 'web' => "\x{201d}"}, # Right double quote.
1220: '(bdquo|#8222)' => {'tex' => ',', 'web' => "\x{201e}"}, # Double low-9 quote.
1221: '(dagger|#8224)' => {'tex' => '+', 'web' => "\x{2020}"}, # Is this a dagger I see before me now?
1222: '(Dagger|#8225)' => {'tex' => '\261', 'web' => "\x{2021}"}, # it's handle pointing towards my heart?
1223: '(bull|#8226)' => {'tex' => '\267', 'web' => "\x{2022}"}, # Bullet.
1224: '(hellep|#8230)' => {'tex' => '{/Symbol \274}', 'web' => "\x{2026}"}, # Ellipses.
1225: '(permil|#8240)' => {'tex' => '%_o', 'web' => "\x{2031}"}, # Per mille.
1226: '(prime|#8242)' => {'tex' => '\264', 'web' => "\x{2032}"}, # Prime.
1227: '(Prime|#8243)' => {'tex' => '{/Symbol \262}', 'web' => "\x{2033}"}, # double prime.
1228: '(lsaquo|#8249)' => {'tex' => '<', 'web' => "\x{2039}"}, # < quote.
1229: '(rsaquo|#8250)' => {'tex' => '\74', 'web' => "\x{203a}"}, # > quote.
1230: '(oline|#8254)' => {'tex' => '{/Symbol \140}', 'web' => "\x{203e}"}, # Overline.
1231: '(frasl|#8260)' => {'tex' => '/', 'web' => "\x{2044}"}, # Fraction slash.
1232: '(euro|#8364)' => {'tex' => '{/Symbol \240}', 'web' => "\x{20ac}"}, # Euro currency.
1233:
1234: # Letter like symbols.
1235:
1236: '(weierp|#8472)' => {'tex' => '{/Symbol \303}', 'web' => "\x{2118}"}, # Power set symbol
1237: '(image|#8465)' => {'tex' => '{/Symbol \301}', 'web' => "\x{2111}"}, # Imaginary part
1238: '(real|#8476)' => {'tex' => '{/Symbol \302}', 'web' => "\x{211c}"}, # Real part.
1239: '(trade|#8482)' => {'tex' => '{/Symbol \344}', 'web' => "\x{2122}"}, # trademark symbol.
1240: '(alefsym|#8501)' => {'tex' => '{/Symbol \300}', 'web' => "\x{2135}"}, # Hebrew alef.
1241:
1242: # Arrows of various types and directions.
1243: '(larr|#8592)' => {'tex' => '{/Symbol \254}', 'web' => "\x{2190}"}, # <--
1244: '(uarr|#8593)' => {'tex' => '{/Symbol \255}', 'web' => "\x{2191}"}, # up arrow.
1245: '(rarr|#8594)' => {'tex' => '{/Symbol \256}', 'web' => "\x{2192}"}, # -->
1246: '(darr|#8595)' => {'tex' => '{/Symbol \257}', 'web' => "\x{2193}"}, # down arrow.
1247: '(harr|#8596)' => {'tex' => '{/Symbol \253}', 'web' => "\x{2194}"}, # <-->
1248: '(crarr|#8629)' => {'tex' => '{/Symbol \277}', 'web' => "\x{21b5}"}, # corner arrow down and right.
1249: '(lArr|#8656)' => {'tex' => '{/Symbol \334}', 'web' => "\x{21d0}"}, # <==
1250: '(uArr|#8657)' => {'tex' => '{/Symbol \335}', 'web' => "\x{21d1}"}, # Up double arrow.
1251: '(rArr|#8658)' => {'tex' => '{/Symbol \336}', 'web' => "\x{21d2}"}, # ==>
1252: '(dArr|#8659)' => {'tex' => '{/Symbol \337}', 'web' => "\x{21d3}"}, # Down double arrow.
1253: '(hArr|#8660)' => {'tex' => '{/Symbol \333}', 'web' => "\x{21d4}"}, # <==>
1254:
1255: # Mathematical operators. For some of these we do the best we can in printing.
1256:
1257: '(forall|#8704)' => {'tex' => '{/Symbol \42}', 'web' => "\x{2200}"}, # For all.
1258: '(part|#8706)' => {'tex' => '{/Symbol d}', 'web' => "\x{2202}"}, # partial derivative
1259: '(exist|#8707)' => {'tex' => '{/Symbol \44}', 'web' => "\x{2203}"}, # There exists.
1260: '(empty|#8709)' => {'tex' => '{/Symbol \306}', 'web' => "\x{2205}"}, # Null set.
1261: '(nabla|#8711)' => {'tex' => '{/Symbol \321}', 'web' => "\x{2207}"}, # Gradient e.g.
1262: '(isin|#8712)' => {'tex' => '{/Symbol \316}', 'web' => "\x{2208}"}, # Element of the set.
1263: '(notin|#8713)' => {'tex' => '{/Symbol \317}', 'web' => "\x{2209}"}, # Not an element of
1264: '(ni|#8715)' => {'tex' => '{/Symbol \47}', 'web' => "\x{220b}"}, # Contains as a member
1265: '(prod|#8719)' => {'tex' => '{/Symbol \325}', 'web' => "\x{220f}"}, # Product
1266: '(sum|#8721)' => {'tex' => '{/Symbol \345}', 'web' => "\x{2211}"}, # Sum of.
1267: '(minus|#8722)' => {'tex' => '{/Symbol \55}', 'web' => "\x{2212}"}, # - sign.
1268: '(lowast|#8727)' => {'tex' => '*', 'web' => "\x{2217}"}, # *
1269: '(radic|#8730)' => {'tex' => '{/Symbol \326}', 'web' => "\x{221a}"}, # Square root.
1270: '(prop|#8733)' => {'tex' => '{/Symbol \265}', 'web' => "\x{221d}"}, # Proportional to.
1271: '(infin|#8734)' => {'tex' => '{/Symbol \245}', 'web' => "\x{221e}"}, # Infinity.
1272: '(ang|#8736)' => {'tex' => '{/Symbol \320}', 'web' => "\x{2220}"}, # Angle .
1273: '(and|#8743)' => {'tex' => '{/Symbol \331}', 'web' => "\x{2227}"}, # Logical and.
1274: '(or|#8744)' => {'tex' => '{/Symbol \332}', 'web' => "\x{2228}"}, # Logical or.
1275: '(cap|#8745)' => {'tex' => '{/Symbol \307}', 'web' => "\x{2229}"}, # Set intersection.
1276: '(cup|#8746)' => {'tex' => '{/Symbol \310}', 'web' => "\x{222a}"}, # Set union.
1277: '(int|8747)' => {'tex' => '{/Symbol \362}', 'web' => "\x{222b}"}, # Integral.
1278:
1279: # Some gnuplot guru will have to explain to me why the next three
1280: # require the extra slashes... else they print very funkily.
1281:
1282: '(there4|#8756)' => {'tex' => '{/Symbol \\\134}', 'web' => "\x{2234}"}, # Therefore triple dots.
1283: '(sim|#8764)' => {'tex' => '\\\176', 'web' => "\x{223c}"}, # Simlar to.
1284: '(cong|#8773)' => {'tex' => '{/Symbol \\\100}','web' => "\x{2245}"}, # Congruent to/with.
1285:
1286: '(asymp|#8776)' => {'tex' => '{/Symbol \273}', 'web' => "\x{2248}"}, # Asymptotic to.
1287: '(ne|#8800)' => {'tex' => '{/Symbol \271}', 'web' => "\x{2260}"}, # not equal to.
1288: '(equiv|#8801)' => {'tex' => '{/Symbol \272}', 'web' => "\x{2261}"}, # Equivalent to.
1289: '(le|8804)' => {'tex' => '{/Symbol \243}', 'web' => "\x{2264}"}, # Less than or equal to.
1290: '(ge|8805)' => {'tex' => '{/Symbol \263}', 'web' => "\x{2265}"}, # Greater than or equal to
1291: '(sub|8834)' => {'tex' => '{/Symbol \314}', 'web' => "\x{2282}"}, # Subset of.
1292: '(sup|8835)' => {'tex' => '{/Symbol \311}', 'web' => "\x{2283}"}, # Super set of.
1293: '(nsub|8836)' => {'tex' => '{/Symbol \313}', 'web' => "\x{2284}"}, # not subset of.
1294: '(sube|8838)' => {'tex' => '{/Symbol \315}', 'web' => "\x{2286}"}, # Subset or equal.
1295: '(supe|8839)' => {'tex' => '{/Symbol \312}', 'web' => "\x{2287}"}, # Superset or equal
1296: '(oplus|8853)' => {'tex' => '{/Symbol \305}', 'web' => "\x{2295}"}, # O with plus inside
1297: '(otimes|8855)' => {'tex' => '{/Symbol \304}', 'web' => "\x{2297}"}, # O with times.
1298: '(perp|8869)' => {'tex' => '{/Symbol \136}', 'web' => "\x{22a5}"}, # Perpendicular.
1299: '(sdot|8901)' => {'tex' => '{/Symbol \227}', 'web' => "\x{22c5}"}, # Dot operator.
1300:
1301: # Misc. technical symbols:
1302:
1303: '(lceil|8698)' => {'tex' => '{/Symbol \351}', 'web' => "\x{2308}"}, # Left ceiling.
1304: '(rceil|8969)' => {'tex' => '{/Symbol \371}', 'web' => "\x{2309}"}, # Right ceiling.
1305: '(lfloor|8970)' => {'tex' => '{/Symbol \353}', 'web' => "\x{230a}"}, # Left floor.
1306: '(rfloor|8971)' => {'tex' => '{/Symbol \373}', 'web' => "\x{230b}"}, # Right floor.
1307:
1308: # The gnuplot png font evidently does not have the big angle brackets at
1309: # positions 0x2329, 0x232a so use ordinary brackets.
1310:
1311: '(lang|9001)' => {'tex' => '{/Symbol \341}', 'web' => '<'}, # Left angle bracket.
1312: '(rang|9002)' => {'tex' => '{/Symbol \361}', 'web' => '>'}, # Right angle bracket.
1313:
1314: # Gemoetric shapes.
1315:
1316: '(loz|9674)' => {'tex' => '{/Symbol \340}', 'web' => "\x{25ca}"}, # Lozenge.
1317:
1318: # Misc. symbols
1319:
1320: '(spades|9824)' => {'tex' => '{/Symbol \252}', 'web' => "\x{2660}"},
1321: '(clubs|9827)' => {'tex' => '{/Symbol \247}', 'web' => "\x{2663}"},
1322: '(hearts|9829)' => {'tex' => '{/Symbol \251}', 'web' => "\x{2665}"},
1323: '(diams|9830)' => {'tex' => '{/Symbol \250}', 'web' => "\x{2666}"}
1324:
1325: );
1326:
1327:
1328: sub replace_entities {
1329: my ($target,$text) = @_;
1330: $text =~ s{([_^~\{\}]|\\\\)}{\\\\$1}g;
1331: while (my ($re, $replace) = each(%lookup)) {
1332: my $repl = $replace->{$target};
1333: $text =~ s/&$re;/$replace->{$target}/g;
1334: }
1335: $text =~ s{(&)}{\\\\$1}g;
1336: return $text;
1337: }
1338:
1339: ##------------------------------------------------------------------- title
1340: sub start_title {
1341: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1342: my $result='';
1343: if ($target eq 'web' || $target eq 'tex') {
1344: $title = &Apache::lonxml::get_all_text("/title",$parser,$style);
1345: $title=&Apache::run::evaluate($title,$safeeval,$$parstack[-1]);
1346: $title =~ s/\n/ /g;
1347: if (length($title) > $max_str_len) {
1348: $title = substr($title,0,$max_str_len);
1349: }
1350: $title = &parse_label($target,$title);
1351: } elsif ($target eq 'edit') {
1352: $result.=&Apache::edit::tag_start($target,$token,'Plot Title');
1353: my $text=&Apache::lonxml::get_all_text("/title",$parser,$style);
1354: $result.=&Apache::edit::editline('',$text,'',60);
1355: } elsif ($target eq 'modified') {
1356: $result.=&Apache::edit::rebuild_tag($token);
1357: $result.=&Apache::edit::modifiedfield("/title",$parser);
1358: }
1359: return $result;
1360: }
1361:
1362: sub end_title {
1363: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1364: my $result = '';
1365: if ($target eq 'web' || $target eq 'tex') {
1366: } elsif ($target eq 'edit') {
1367: $result.=&Apache::edit::tag_end($target,$token);
1368: }
1369: return $result;
1370: }
1371: ##------------------------------------------------------------------- xlabel
1372: sub start_xlabel {
1373: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1374: my $result='';
1375: if ($target eq 'web' || $target eq 'tex') {
1376: $xlabel = &Apache::lonxml::get_all_text("/xlabel",$parser,$style);
1377: $xlabel=&Apache::run::evaluate($xlabel,$safeeval,$$parstack[-1]);
1378: $xlabel =~ s/\n/ /g;
1379: if (length($xlabel) > $max_str_len) {
1380: $xlabel = substr($xlabel,0,$max_str_len);
1381: }
1382: $xlabel = &parse_label($target,$xlabel);
1383: } elsif ($target eq 'edit') {
1384: $result.=&Apache::edit::tag_start($target,$token,'Plot Xlabel');
1385: my $text=&Apache::lonxml::get_all_text("/xlabel",$parser,$style);
1386: $result.=&Apache::edit::editline('',$text,'',60);
1387: } elsif ($target eq 'modified') {
1388: $result.=&Apache::edit::rebuild_tag($token);
1389: $result.=&Apache::edit::modifiedfield("/xlabel",$parser);
1390: }
1391: return $result;
1392: }
1393:
1394: sub end_xlabel {
1395: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1396: my $result = '';
1397: if ($target eq 'web' || $target eq 'tex') {
1398: } elsif ($target eq 'edit') {
1399: $result.=&Apache::edit::tag_end($target,$token);
1400: }
1401: return $result;
1402: }
1403:
1404: ##------------------------------------------------------------------- ylabel
1405: sub start_ylabel {
1406: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1407: my $result='';
1408: if ($target eq 'web' || $target eq 'tex') {
1409: $ylabel = &Apache::lonxml::get_all_text("/ylabel",$parser,$style);
1410: $ylabel = &Apache::run::evaluate($ylabel,$safeeval,$$parstack[-1]);
1411: $ylabel =~ s/\n/ /g;
1412: if (length($ylabel) > $max_str_len) {
1413: $ylabel = substr($ylabel,0,$max_str_len);
1414: }
1415: $ylabel = &parse_label($target,$ylabel);
1416: } elsif ($target eq 'edit') {
1417: $result .= &Apache::edit::tag_start($target,$token,'Plot Ylabel');
1418: my $text = &Apache::lonxml::get_all_text("/ylabel",$parser,$style);
1419: $result .= &Apache::edit::editline('',$text,'',60);
1420: } elsif ($target eq 'modified') {
1421: $result.=&Apache::edit::rebuild_tag($token);
1422: $result.=&Apache::edit::modifiedfield("/ylabel",$parser);
1423: }
1424: return $result;
1425: }
1426:
1427: sub end_ylabel {
1428: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1429: my $result = '';
1430: if ($target eq 'web' || $target eq 'tex') {
1431: } elsif ($target eq 'edit') {
1432: $result.=&Apache::edit::tag_end($target,$token);
1433: }
1434: return $result;
1435: }
1436:
1437: ##------------------------------------------------------------------- label
1438: sub start_label {
1439: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1440: my $result='';
1441: if ($target eq 'web' || $target eq 'tex') {
1442: my %label;
1443: &get_attributes(\%label,\%label_defaults,$parstack,$safeeval,
1444: $tagstack->[-1]);
1445: my $text = &Apache::lonxml::get_all_text("/label",$parser,$style);
1446: $text = &Apache::run::evaluate($text,$safeeval,$$parstack[-1]);
1447: $text =~ s/\n/ /g;
1448: $text = substr($text,0,$max_str_len) if (length($text) > $max_str_len);
1449: $label{'text'} = &parse_label($target,$text);
1450: push(@labels,\%label);
1451: } elsif ($target eq 'edit') {
1452: $result .= &Apache::edit::tag_start($target,$token,'Plot Label');
1453: $result .= &edit_attributes($target,$token,\%label_defaults);
1454: my $text = &Apache::lonxml::get_all_text("/label",$parser,$style);
1455: $result .= &Apache::edit::end_row().
1456: &Apache::edit::start_spanning_row().
1457: &Apache::edit::editline('',$text,'',60);
1458: } elsif ($target eq 'modified') {
1459: &Apache::edit::get_new_args
1460: ($token,$parstack,$safeeval,keys(%label_defaults));
1461: $result.=&Apache::edit::rebuild_tag($token);
1462: $result.=&Apache::edit::modifiedfield("/label",$parser);
1463: }
1464: return $result;
1465: }
1466:
1467: sub end_label {
1468: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1469: my $result = '';
1470: if ($target eq 'web' || $target eq 'tex') {
1471: } elsif ($target eq 'edit') {
1472: $result.=&Apache::edit::tag_end($target,$token);
1473: }
1474: return $result;
1475: }
1476:
1477: ##------------------------------------------------------------------- curve
1478: sub start_curve {
1479: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1480: my $result='';
1481: &Apache::lonxml::register('Apache::lonplot',('function','data'));
1482: push (@Apache::lonxml::namespace,'curve');
1483: if ($target eq 'web' || $target eq 'tex') {
1484: my %curve;
1485: &get_attributes(\%curve,\%curve_defaults,$parstack,$safeeval,
1486: $tagstack->[-1]);
1487: push (@curves,\%curve);
1488: } elsif ($target eq 'edit') {
1489: $result .= &Apache::edit::tag_start($target,$token,'Curve');
1490: $result .= &edit_attributes($target,$token,\%curve_defaults,
1491: \@curve_edit_order)
1492: .&Apache::edit::end_row()
1493: .&Apache::edit::start_spanning_row();
1494:
1495: } elsif ($target eq 'modified') {
1496: my $constructtag=&Apache::edit::get_new_args
1497: ($token,$parstack,$safeeval,keys(%curve_defaults));
1498: if ($constructtag) {
1499: #
1500: # Fix up the color attribute as jcolor does not prepend an x
1501: #
1502: my $value = $token->[2]{'color'};
1503: if (defined $value && !($value =~ /^x/)) {
1504: $token->[2]{'color'} = 'x' . $value;
1505: }
1506: $result = &Apache::edit::rebuild_tag($token);
1507: }
1508: }
1509: return $result;
1510: }
1511:
1512: sub end_curve {
1513: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1514: my $result = '';
1515: pop @Apache::lonxml::namespace;
1516: &Apache::lonxml::deregister('Apache::lonplot',('function','data'));
1517: if ($target eq 'web' || $target eq 'tex') {
1518: } elsif ($target eq 'edit') {
1519: $result.=&Apache::edit::tag_end($target,$token);
1520: }
1521: return $result;
1522: }
1523:
1524: ##------------------------------------------------------------ curve function
1525: sub start_function {
1526: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1527: my $result='';
1528: if ($target eq 'web' || $target eq 'tex') {
1529: if (exists($curves[-1]->{'data'})) {
1530: &Apache::lonxml::warning
1531: ('Use of the <b>curve function</b> tag precludes use of '.
1532: ' the <b>curve data</b> tag. '.
1533: 'The curve data tag will be omitted in favor of the '.
1534: 'curve function declaration.');
1535: delete $curves[-1]->{'data'} ;
1536: }
1537: my $function = &Apache::lonxml::get_all_text("/function",$parser,
1538: $style);
1539: $function = &Apache::run::evaluate($function,$safeeval,$$parstack[-1]);
1540: $function=~s/\^/\*\*/gs;
1541: $function=~ s/^\s+//; # Trim leading
1542: $function=~ s/\s+$//; # And trailing whitespace.
1543: $curves[-1]->{'function'} = $function;
1544: } elsif ($target eq 'edit') {
1545: $result .= &Apache::edit::tag_start($target,$token,'Gnuplot compatible curve function');
1546: my $text = &Apache::lonxml::get_all_text("/function",$parser,$style);
1547: $result .= &Apache::edit::editline('',$text,'',60);
1548: } elsif ($target eq 'modified') {
1549: $result.=&Apache::edit::rebuild_tag($token);
1550: $result.=&Apache::edit::modifiedfield("/function",$parser);
1551: }
1552: return $result;
1553: }
1554:
1555: sub end_function {
1556: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1557: my $result = '';
1558: if ($target eq 'web' || $target eq 'tex') {
1559: } elsif ($target eq 'edit') {
1560: $result .= &Apache::edit::end_table();
1561: }
1562: return $result;
1563: }
1564:
1565: ##------------------------------------------------------------ curve data
1566: sub start_data {
1567: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1568: my $result='';
1569: if ($target eq 'web' || $target eq 'tex') {
1570: if (exists($curves[-1]->{'function'})) {
1571: &Apache::lonxml::warning
1572: ('Use of the <b>curve function</b> tag precludes use of '.
1573: ' the <b>curve data</b> tag. '.
1574: 'The curve function tag will be omitted in favor of the '.
1575: 'curve data declaration.');
1576: delete($curves[-1]->{'function'});
1577: }
1578: my $datatext = &Apache::lonxml::get_all_text("/data",$parser,$style);
1579: $datatext=&Apache::run::evaluate($datatext,$safeeval,$$parstack[-1]);
1580: # Deal with cases where we're given an array...
1581: if ($datatext =~ /^\@/) {
1582: $datatext = &Apache::run::run('return "'.$datatext.'"',
1583: $safeeval,1);
1584: }
1585: $datatext =~ s/\s+/ /g;
1586: # Need to do some error checking on the @data array -
1587: # make sure it's all numbers and make sure each array
1588: # is of the same length.
1589: my @data;
1590: if ($datatext =~ /,/) { # comma deliminated
1591: @data = split /,/,$datatext;
1592: } else { # Assume it's space separated.
1593: @data = split / /,$datatext;
1594: }
1595: for (my $i=0;$i<=$#data;$i++) {
1596: # Check that it's non-empty
1597: if (! defined($data[$i])) {
1598: &Apache::lonxml::warning(
1599: 'undefined curve data value. Replacing with '.
1600: ' pi/e = 1.15572734979092');
1601: $data[$i] = 1.15572734979092;
1602: }
1603: # Check that it's a number
1604: if (! &$real_test($data[$i]) & ! &$int_test($data[$i])) {
1605: &Apache::lonxml::warning(
1606: 'Bad curve data value of '.$data[$i].' Replacing with '.
1607: ' pi/e = 1.15572734979092');
1608: $data[$i] = 1.15572734979092;
1609: }
1610: }
1611: # complain if the number of data points is not the same as
1612: # in previous sets of data.
1613: if (($curves[-1]->{'data'}) && ($#data != $#{$curves[-1]->{'data'}->[0]})){
1614: &Apache::lonxml::warning
1615: ('Number of data points is not consistent with previous '.
1616: 'number of data points');
1617: }
1618: push @{$curves[-1]->{'data'}},\@data;
1619: } elsif ($target eq 'edit') {
1620: $result .= &Apache::edit::tag_start($target,$token,'Comma or space deliminated curve data');
1621: my $text = &Apache::lonxml::get_all_text("/data",$parser,$style);
1622: $result .= &Apache::edit::editline('',$text,'',60);
1623: } elsif ($target eq 'modified') {
1624: $result.=&Apache::edit::rebuild_tag($token);
1625: $result.=&Apache::edit::modifiedfield("/data",$parser);
1626: }
1627: return $result;
1628: }
1629:
1630: sub end_data {
1631: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1632: my $result = '';
1633: if ($target eq 'web' || $target eq 'tex') {
1634: } elsif ($target eq 'edit') {
1635: $result .= &Apache::edit::end_table();
1636: }
1637: return $result;
1638: }
1639:
1640: ##------------------------------------------------------------------- axis
1641: sub start_axis {
1642: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1643: my $result='';
1644: if ($target eq 'web' || $target eq 'tex') {
1645: &get_attributes(\%axis,\%axis_defaults,$parstack,$safeeval,
1646: $tagstack->[-1]);
1647: } elsif ($target eq 'edit') {
1648: $result .= &Apache::edit::tag_start($target,$token,'Plot Axes');
1649: $result .= &edit_attributes($target,$token,\%axis_defaults,
1650: \@axis_edit_order);
1651: } elsif ($target eq 'modified') {
1652: my $constructtag=&Apache::edit::get_new_args
1653: ($token,$parstack,$safeeval,keys(%axis_defaults));
1654:
1655: if ($constructtag) {
1656: #
1657: # Fix up the color attribute since jchooser does not
1658: # prepend an x to the color:
1659: #
1660: my $value = $token->[2]{'color'};
1661: if (defined $value && !($value =~ /^x/)) {
1662: $token->[2]{'color'} = 'x' . $value;
1663: }
1664:
1665: $result = &Apache::edit::rebuild_tag($token);
1666: }
1667: }
1668: return $result;
1669: }
1670:
1671: sub end_axis {
1672: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1673: my $result = '';
1674: if ($target eq 'web' || $target eq 'tex') {
1675: } elsif ($target eq 'edit') {
1676: $result.=&Apache::edit::tag_end($target,$token);
1677: } elsif ($target eq 'modified') {
1678: }
1679: return $result;
1680: }
1681:
1682: ###################################################################
1683: ## ##
1684: ## Utility Functions ##
1685: ## ##
1686: ###################################################################
1687:
1688: ##----------------------------------------------------------- set_defaults
1689: sub set_defaults {
1690: my ($var,$defaults) = @_;
1691: my $key;
1692: foreach $key (keys(%$defaults)) {
1693: $var->{$key} = $defaults->{$key}->{'default'};
1694: }
1695: }
1696:
1697: ##------------------------------------------------------------------- misc
1698: sub get_attributes{
1699: my ($values,$defaults,$parstack,$safeeval,$tag) = @_;
1700: foreach my $attr (keys(%{$defaults})) {
1701: if ($attr eq 'texwidth' || $attr eq 'texfont') {
1702: $values->{$attr} =
1703: &Apache::lonxml::get_param($attr,$parstack,$safeeval,undef,1);
1704: } else {
1705: $values->{$attr} =
1706: &Apache::lonxml::get_param($attr,$parstack,$safeeval);
1707: }
1708: if ($values->{$attr} eq '' | !defined($values->{$attr})) {
1709: $values->{$attr} = $defaults->{$attr}->{'default'};
1710: next;
1711: }
1712: my $test = $defaults->{$attr}->{'test'};
1713: if (! &$test($values->{$attr})) {
1714: &Apache::lonxml::warning
1715: ($tag.':'.$attr.': Bad value.'.'Replacing your value with : '
1716: .$defaults->{$attr}->{'default'} );
1717: $values->{$attr} = $defaults->{$attr}->{'default'};
1718: }
1719: }
1720: return ;
1721: }
1722: ##
1723: # Generate tic mark specifications.
1724: #
1725: # @param type - type of tics (xtics or ytics).
1726: # @param spec - Reference to a hash that contains the tic specification.
1727: # @param target - 'tex' if hard copy target.
1728: #
1729: # @return string - the tic specification command.
1730: #
1731: sub generate_tics {
1732: my ($type, $spec, $target) = @_;
1733: my $result = '';
1734:
1735:
1736: if ((ref($spec) eq 'HASH') && (keys(%{$spec}) > 0)) {
1737:
1738:
1739:
1740: # Major tics: - If there are 'ticspecs' these override any other
1741: # specifications:
1742:
1743:
1744:
1745: $result .= "set $type $spec->{'location'} ";
1746: $result .= ($spec->{'mirror'} eq 'on') ? 'mirror ' : 'nomirror ';
1747: if ($spec->{'rotate'} eq 'on') {
1748: $result .= ' rotate ';
1749: }
1750: if (defined $spec->{'ticspecs'}) {
1751: $result .= '( ';
1752: my @ticspecs;
1753: my $ticinfo = $spec->{'ticspecs'};
1754: foreach my $tic (@$ticinfo) {
1755: push(@ticspecs, '"' . $tic->{'label'} . '" ' . $tic->{'pos'} );
1756: }
1757: $result .= join(', ', (@ticspecs));
1758: $result .= ' )';
1759: } else {
1760: $result .= "$spec->{'start'}, ";
1761: $result .= "$spec->{'increment'}, ";
1762: $result .= "$spec->{'end'} ";
1763: }
1764: if ($target eq 'tex' ) {
1765: $result .= 'font "Helvetica,22"';
1766: }
1767: $result .= "\n";
1768:
1769: # minor frequency:
1770:
1771: if ($spec->{'minorfreq'} != 0) {
1772: $result .= "set m$type $spec->{'minorfreq'}\n";
1773: }
1774: } elsif ($target eq 'tex' ) {
1775: $result .= "set $type font " . '"Helvetica,22"' ."\n";
1776: }
1777:
1778:
1779: return $result;
1780: }
1781:
1782: ##------------------------------------------------------- write_gnuplot_file
1783: sub write_gnuplot_file {
1784: my ($tmpdir,$filename,$target)= @_;
1785: my ($fontsize, $font_properties) = &get_font($target);
1786: my $gnuplot_input = '';
1787: my $curve;
1788: #
1789: # Check to be sure we do not have any empty curves
1790: my @curvescopy;
1791: foreach my $curve (@curves) {
1792: if (exists($curve->{'function'})) {
1793: if ($curve->{'function'} !~ /^\s*$/) {
1794: push(@curvescopy,$curve);
1795: }
1796: } elsif (exists($curve->{'data'})) {
1797: foreach my $data (@{$curve->{'data'}}) {
1798: if (scalar(@$data) > 0) {
1799: push(@curvescopy,$curve);
1800: last;
1801: }
1802: }
1803: }
1804: }
1805: @curves = @curvescopy;
1806: # Collect all the colors
1807: my @Colors;
1808: push @Colors, $Apache::lonplot::plot{'bgcolor'};
1809: push @Colors, $Apache::lonplot::plot{'fgcolor'};
1810: push @Colors, (defined($axis{'color'})?$axis{'color'}:$Apache::lonplot::plot{'fgcolor'});
1811: foreach $curve (@curves) {
1812: push @Colors, ($curve->{'color'} ne '' ?
1813: $curve->{'color'} :
1814: $Apache::lonplot::plot{'fgcolor'} );
1815: }
1816:
1817: # set term
1818: if ($target eq 'web') {
1819: $gnuplot_input .= 'set terminal png enhanced nocrop ';
1820: $gnuplot_input .= 'transparent ' if ($Apache::lonplot::plot{'transparent'} eq 'on');
1821: $gnuplot_input .= 'font "'.$Apache::lonnet::perlvar{'lonFontsDir'}.
1822: '/'.$font_properties->{'file'}.'.ttf" ';
1823: $gnuplot_input .= $fontsize;
1824: $gnuplot_input .= ' size '.$Apache::lonplot::plot{'width'}.','.$Apache::lonplot::plot{'height'}.' ';
1825: $gnuplot_input .= "@Colors\n";
1826: # set output
1827: $gnuplot_input .= "set output\n";
1828: } elsif ($target eq 'tex') {
1829: $gnuplot_input .= "set term postscript eps enhanced $Apache::lonplot::plot{'plotcolor'} dash ";
1830: if (!$font_properties->{'tex_no_file'}) {
1831: $gnuplot_input .=
1832: 'fontfile "'.$Apache::lonnet::perlvar{'lonFontsDir'}.
1833: '/'.$font_properties->{'file'}.'.pfb" ';
1834: }
1835: $gnuplot_input .= ' "'.$font_properties->{'printname'}.'" ';
1836: $gnuplot_input .= $fontsize;
1837: $gnuplot_input .= "\nset output \"".$tmpdir.
1838: &unescape($filename).".eps\"\n";
1839: $gnuplot_input .= "set encoding iso_8859_1\n"; # Get access to extended font.
1840:
1841: }
1842: $gnuplot_input .= "set encoding utf8\n";
1843: # cartesian or polar plot?
1844: if (lc($Apache::lonplot::plot{'plottype'}) eq 'polar') {
1845: $gnuplot_input .= 'set polar'.$/;
1846: } else {
1847: # Assume Cartesian
1848: }
1849: # cartesian or polar grid?
1850: if (lc($Apache::lonplot::plot{'gridtype'}) eq 'polar') {
1851: $gnuplot_input .= 'set grid polar'.$/;
1852: } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'linear-log') {
1853: $gnuplot_input .= 'set logscale x'.$/;
1854: } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'log-linear') {
1855: $gnuplot_input .= 'set logscale y'.$/;
1856: } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'log-log') {
1857: $gnuplot_input .= 'set logscale x'.$/;
1858: $gnuplot_input .= 'set logscale y'.$/;
1859: } else {
1860: # Assume Cartesian
1861: }
1862: # solid or pattern for boxes?
1863: if (lc($Apache::lonplot::plot{'fillstyle'}) eq 'solid') {
1864: $gnuplot_input .= 'set style fill solid '.
1865: $Apache::lonplot::plot{'solid'}.$Apache::lonplot::plot{'box_border'}.$/;
1866: } elsif (lc($Apache::lonplot::plot{'fillstyle'}) eq 'pattern') {
1867: $gnuplot_input .= 'set style fill pattern '.$Apache::lonplot::plot{'pattern'}.$Apache::lonplot::plot{'box_border'}.$/;
1868: } elsif (lc($Apache::lonplot::plot{'fillstyle'}) eq 'empty') {
1869: }
1870: # margin
1871: if (lc($Apache::lonplot::plot{'lmargin'}) ne 'default') {
1872: $gnuplot_input .= 'set lmargin '.$Apache::lonplot::plot{'lmargin'}.$/;
1873: }
1874: if (lc($Apache::lonplot::plot{'rmargin'}) ne 'default') {
1875: $gnuplot_input .= 'set rmargin '.$Apache::lonplot::plot{'rmargin'}.$/;
1876: }
1877: if (lc($Apache::lonplot::plot{'tmargin'}) ne 'default') {
1878: $gnuplot_input .= 'set tmargin '.$Apache::lonplot::plot{'tmargin'}.$/;
1879: }
1880: if (lc($Apache::lonplot::plot{'bmargin'}) ne 'default') {
1881: $gnuplot_input .= 'set bmargin '.$Apache::lonplot::plot{'bmargin'}.$/;
1882: }
1883:
1884: # tic scales
1885: if ($version > 4) {
1886: $gnuplot_input .= 'set tics scale '.
1887: $Apache::lonplot::plot{'major_ticscale'}.', '.$Apache::lonplot::plot{'minor_ticscale'}.$/;
1888: } else {
1889: $gnuplot_input .= 'set ticscale '.
1890: $Apache::lonplot::plot{'major_ticscale'}.' '.$Apache::lonplot::plot{'minor_ticscale'}.$/;
1891: }
1892: #boxwidth
1893: if (lc($Apache::lonplot::plot{'boxwidth'}) ne '') {
1894: $gnuplot_input .= 'set boxwidth '.$Apache::lonplot::plot{'boxwidth'}.$/;
1895: }
1896: # gridlayer
1897: $gnuplot_input .= 'set grid noxtics noytics front '.$/
1898: if ($Apache::lonplot::plot{'gridlayer'} eq 'on');
1899:
1900: # grid
1901: $gnuplot_input .= 'set grid'.$/ if ($Apache::lonplot::plot{'grid'} eq 'on');
1902: # border
1903: $gnuplot_input .= ($Apache::lonplot::plot{'border'} eq 'on'?
1904: 'set border'.$/ :
1905: 'set noborder'.$/ );
1906: # sampling rate for non-data curves
1907: $gnuplot_input .= "set samples $Apache::lonplot::plot{'samples'}\n";
1908: # title, xlabel, ylabel
1909: # titles
1910: my $extra_space_x = ($xtics{'location'} eq 'axis') ? ' offset 0, -0.5 ' : '';
1911: my $extra_space_y = ($ytics{'location'} eq 'axis') ? ' offset -0.5, 0 ' : '';
1912:
1913: if ($target eq 'tex') {
1914: $gnuplot_input .= "set title \"$title\" font \"".$font_properties->{'printname'}.",".$fontsize."pt\"\n" if (defined($title)) ;
1915: $gnuplot_input .= "set xlabel \"$xlabel\" $extra_space_x font \"".$font_properties->{'printname'}.",".$fontsize."pt\"\n" if (defined($xlabel));
1916: $gnuplot_input .= "set ylabel \"$ylabel\" $extra_space_y font \"".$font_properties->{'printname'}.",".$fontsize."pt\"\n" if (defined($ylabel));
1917: } else {
1918: $gnuplot_input .= "set title \"$title\" \n" if (defined($title)) ;
1919: $gnuplot_input .= "set xlabel \"$xlabel\" $extra_space_x \n" if (defined($xlabel));
1920: $gnuplot_input .= "set ylabel \"$ylabel\" $extra_space_y \n" if (defined($ylabel));
1921: }
1922: # tics
1923: $gnuplot_input .= &generate_tics('xtics', \%xtics, $target);
1924:
1925: $gnuplot_input .= &generate_tics('ytics', \%ytics, $target);
1926:
1927: # axis
1928: if (%axis) {
1929: if ($axis{'xformat'} ne 'on') {
1930: $gnuplot_input .= "set format x ";
1931: if ($axis{'xformat'} eq 'off') {
1932: $gnuplot_input .= "\"\"\n";
1933: } else {
1934: $gnuplot_input .= "\"\%.".$axis{'xformat'}."\"\n";
1935: }
1936: }
1937: if ($axis{'yformat'} ne 'on') {
1938: $gnuplot_input .= "set format y ";
1939: if ($axis{'yformat'} eq 'off') {
1940: $gnuplot_input .= "\"\"\n";
1941: } else {
1942: $gnuplot_input .= "\"\%.".$axis{'yformat'}."\"\n";
1943: }
1944: }
1945: $gnuplot_input .= "set xrange \[$axis{'xmin'}:$axis{'xmax'}\]\n";
1946: $gnuplot_input .= "set yrange \[$axis{'ymin'}:$axis{'ymax'}\]\n";
1947: if ($axis{'xzero'} ne 'off') {
1948: $gnuplot_input .= "set xzeroaxis ";
1949: if ($axis{'xzero'} eq 'line' || $axis{'xzero'} eq 'thick-line') {
1950: $gnuplot_input .= "lt -1 ";
1951: if ($axis{'xzero'} eq 'thick-line') {
1952: $gnuplot_input .= "lw 3 ";
1953: }
1954: }
1955: $gnuplot_input .= "\n";
1956: }
1957: if ($axis{'yzero'} ne 'off') {
1958: $gnuplot_input .= "set yzeroaxis ";
1959: if ($axis{'yzero'} eq 'line' || $axis{'yzero'} eq 'thick-line') {
1960: $gnuplot_input .= "lt -1 ";
1961: if ($axis{'yzero'} eq 'thick-line') {
1962: $gnuplot_input .= "lw 3 ";
1963: }
1964: }
1965: $gnuplot_input .= "\n";
1966: }
1967: }
1968: # Key
1969: if (%key) {
1970: $gnuplot_input .= 'set key '.$key{'pos'}.' ';
1971: if ($key{'title'} ne '') {
1972: $gnuplot_input .= 'title "'.$key{'title'}.'" ';
1973: }
1974: $gnuplot_input .= ($key{'box'} eq 'on' ? 'box ' : 'nobox ').$/;
1975: } else {
1976: $gnuplot_input .= 'set nokey'.$/;
1977: }
1978: # labels
1979: my $label;
1980: foreach $label (@labels) {
1981: $gnuplot_input .= 'set label "'.$label->{'text'}.'" at '.
1982: $label->{'xpos'}.','.$label->{'ypos'};
1983: if ($label->{'rotate'} ne '') {
1984: $gnuplot_input .= ' rotate by '.$label->{'rotate'};
1985: }
1986: $gnuplot_input .= ' '.$label->{'justify'};
1987:
1988: if ($target eq 'tex') {
1989: $gnuplot_input .=' font "'.$font_properties->{'printname'}.','.$fontsize.'pt"';
1990: }
1991: if (($label->{'zlayer'} eq 'front') || ($label->{'zlayer'} eq 'back')) {
1992: $gnuplot_input .= ' '.$label->{'zlayer'};
1993: }
1994: $gnuplot_input .= $/;
1995: }
1996: if ($target eq 'tex') {
1997: $gnuplot_input .="set size 1,".$Apache::lonplot::plot{'height'}/$Apache::lonplot::plot{'width'}*1.38;
1998: $gnuplot_input .="\n";
1999: }
2000: # curves
2001: #
2002: # Each curve will have its very own linestyle.
2003: # (This should work just fine in web rendition I think).
2004: # The line_xxx variables will hold the elements of the line style.
2005: # type (solid/dashed), color, width
2006: #
2007: my $linestyle_index = 50;
2008: my $line_width = '';
2009: my $plots = '';
2010:
2011: # If arrows are needed there will be an arrow style for each as well:
2012: #
2013:
2014: my $arrow_style_index = 50;
2015:
2016: for (my $i = 0;$i<=$#curves;$i++) {
2017: $curve = $curves[$i];
2018: my $plot_command = '';
2019: my $plot_type = '';
2020: if ($i > 0) {
2021: $plot_type = ', ';
2022: }
2023: if ($target eq 'tex') {
2024: $curve->{'linewidth'} *= 2;
2025: }
2026: $line_width = $curve->{'linewidth'};
2027: if (exists($curve->{'function'})) {
2028: $plot_type .=
2029: $curve->{'function'}.' title "'.
2030: $curve->{'name'}.'" with '.
2031: $curve->{'linestyle'};
2032: } elsif (exists($curve->{'data'})) {
2033: # Store data values in $datatext
2034: my $datatext = '';
2035: # get new filename
2036: my $datafilename = "$tmpdir/$filename.data.$i";
2037: my $fh=Apache::File->new(">$datafilename");
2038: # Compile data
2039: my @Data = @{$curve->{'data'}};
2040: my @Data0 = @{$Data[0]};
2041: for (my $i =0; $i<=$#Data0; $i++) {
2042: my $dataset;
2043: foreach $dataset (@Data) {
2044: $datatext .= $dataset->[$i] . ' ';
2045: }
2046: $datatext .= $/;
2047: }
2048: # write file
2049: print $fh $datatext;
2050: close($fh);
2051: # generate gnuplot text
2052: $plot_type .= '"'.$datafilename.'" title "'.
2053: $curve->{'name'}.'" with '.
2054: $curve->{'linestyle'};
2055: }
2056: my $pointtype = '';
2057: my $pointsize = '';
2058:
2059: # Figure out the linestyle:
2060:
2061: my $lt = $curve->{'linetype'} ne '' ? $curve->{'linetype'}
2062: : 'solid'; # Line type defaults to solid.
2063: # The mapping of lt -> the actual gnuplot line type depends on the target:
2064:
2065: if ($target eq 'tex') {
2066: $lt = $ps_linetypes{$lt};
2067: } else {
2068: $lt = $linetypes{$lt}
2069: }
2070:
2071: my $color = $curve->{'color'};
2072: $color =~ s/^x/#/; # Convert xhex color -> #hex color.
2073:
2074:
2075: if (($curve->{'linestyle'} eq 'points') ||
2076: ($curve->{'linestyle'} eq 'linespoints') ||
2077: ($curve->{'linestyle'} eq 'errorbars') ||
2078: ($curve->{'linestyle'} eq 'xerrorbars') ||
2079: ($curve->{'linestyle'} eq 'yerrorbars') ||
2080: ($curve->{'linestyle'} eq 'xyerrorbars')) {
2081:
2082: $pointtype =' pointtype '.$curve->{'pointtype'};
2083: $pointsize =' pointsize '.$curve->{'pointsize'};
2084: } elsif ($curve->{'linestyle'} eq 'filledcurves') {
2085: $plot_command.= ' '.$curve->{'limit'};
2086: } elsif ($curve->{'linestyle'} eq 'vector') {
2087:
2088: # Create the arrow head style add it to
2089: # $gnuplot_input..and ensure it gets
2090: # Selected in the plot command.
2091:
2092: $gnuplot_input .= "set style arrow $arrow_style_index ";
2093: $gnuplot_input .= ' ' . $curve->{'arrowhead'};
2094: $gnuplot_input .= ' size ' . $curve->{'arrowlength'};
2095: $gnuplot_input .= ','.$curve->{'arrowangle'};
2096: $gnuplot_input .= ',' . $curve->{'arrowbackangle'};
2097: $gnuplot_input .= ' ' . $curve->{'arrowstyle'} . " ls $linestyle_index\n";
2098:
2099:
2100: $plot_command .= " arrowstyle $arrow_style_index ";
2101: $arrow_style_index++;
2102: }
2103:
2104: my $style_command = "set style line $linestyle_index $pointtype $pointsize linetype $lt linewidth $line_width lc rgb '$color'\n";
2105: $gnuplot_input .= $style_command;
2106:
2107: # The condition below is because gnuplot lumps the linestyle in with the
2108: # arrowstyle _sigh_.
2109:
2110: if ($curve->{'linestyle'} ne 'vector') {
2111: $plot_command.= " ls $linestyle_index";
2112: }
2113:
2114: $plots .= $plot_type . ' ' . $plot_command;
2115: $linestyle_index++; # Each curve get a unique linestyle.
2116: }
2117: $gnuplot_input .= 'plot '.$plots;
2118: # Write the output to a file.
2119:
2120: # &Apache::lonnet::logthis($gnuplot_input); # uncomment to log the gnuplot input.
2121: open (my $fh, "> $tmpdir$filename.data");
2122: binmode($fh, ':utf8');
2123: print $fh $gnuplot_input;
2124: close($fh);
2125: # That's all folks.
2126: return ;
2127: }
2128:
2129: #---------------------------------------------- check_inputs
2130: sub check_inputs {
2131: ## Note: no inputs, no outputs - this acts only on global variables.
2132: ## Make sure we have all the input we need:
2133: if (! %Apache::lonplot::plot) { &set_defaults(\%Apache::lonplot::plot,\%gnuplot_defaults); }
2134: if (! %key ) {} # No key for this plot, thats okay
2135: # if (! %axis) { &set_defaults(\%axis,\%axis_defaults); }
2136: if (! defined($title )) {} # No title for this plot, thats okay
2137: if (! defined($xlabel)) {} # No xlabel for this plot, thats okay
2138: if (! defined($ylabel)) {} # No ylabel for this plot, thats okay
2139: if ($#labels < 0) { } # No labels for this plot, thats okay
2140: if ($#curves < 0) {
2141: &Apache::lonxml::warning("No curves specified for plot!!!!");
2142: return '';
2143: }
2144: my $curve;
2145: foreach $curve (@curves) {
2146: if (!defined($curve->{'function'})&&!defined($curve->{'data'})){
2147: &Apache::lonxml::warning("One of the curves specified did not contain any curve data or curve function declarations\n");
2148: return '';
2149: }
2150: }
2151: }
2152:
2153: #------------------------------------------------ make_edit
2154: sub edit_attributes {
2155: my ($target,$token,$defaults,$keys) = @_;
2156: my ($result,@keys);
2157: if ($keys && ref($keys) eq 'ARRAY') {
2158: @keys = @$keys;
2159: } else {
2160: @keys = sort(keys(%$defaults));
2161: }
2162: foreach my $attr (@keys) {
2163: # append a ' ' to the description if it doesn't have one already.
2164: my $description = $defaults->{$attr}->{'description'};
2165: $description .= ' ' if ($description !~ / $/);
2166: if ($defaults->{$attr}->{'edit_type'} eq 'entry') {
2167: $result .= &Apache::edit::text_arg
2168: ($description,$attr,$token,
2169: $defaults->{$attr}->{'size'},
2170: $defaults->{$attr}->{'class'});
2171: } elsif ($defaults->{$attr}->{'edit_type'} eq 'choice') {
2172: $result .= &Apache::edit::select_or_text_arg
2173: ($description,$attr,$defaults->{$attr}->{'choices'},$token);
2174: } elsif ($defaults->{$attr}->{'edit_type'} eq 'onoff') {
2175: $result .= &Apache::edit::select_or_text_arg
2176: ($description,$attr,['on','off'],$token);
2177: }
2178: $result .= '<br />';
2179: }
2180: return $result;
2181: }
2182:
2183:
2184: ###################################################################
2185: ## ##
2186: ## Insertion functions for editing plots ##
2187: ## ##
2188: ###################################################################
2189:
2190: sub insert_gnuplot {
2191: my $result = '';
2192: # plot attributes
2193: $result .= "\n<gnuplot ";
2194: foreach my $attr (keys(%gnuplot_defaults)) {
2195: $result .= "\n $attr=\"$gnuplot_defaults{$attr}->{'default'}\"";
2196: }
2197: $result .= ">";
2198: # Add the components (most are commented out for simplicity)
2199: # $result .= &insert_key();
2200: # $result .= &insert_axis();
2201: # $result .= &insert_title();
2202: # $result .= &insert_xlabel();
2203: # $result .= &insert_ylabel();
2204: $result .= &insert_curve();
2205: # close up the <gnuplot>
2206: $result .= "\n</gnuplot>";
2207: return $result;
2208: }
2209:
2210: sub insert_tics {
2211: my $result;
2212: $result .= &insert_xtics() . &insert_ytics;
2213: return $result;
2214: }
2215:
2216: sub insert_xtics {
2217: my $result;
2218: $result .= "\n <xtics ";
2219: foreach my $attr (keys(%tic_defaults)) {
2220: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
2221: }
2222: $result .= "/>";
2223: return $result;
2224: }
2225:
2226: sub insert_ytics {
2227: my $result;
2228: $result .= "\n <ytics ";
2229: foreach my $attr (keys(%tic_defaults)) {
2230: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
2231: }
2232: $result .= "/>";
2233: return $result;
2234: }
2235:
2236: sub insert_key {
2237: my $result;
2238: $result .= "\n <key ";
2239: foreach my $attr (keys(%key_defaults)) {
2240: $result .= "\n $attr=\"$key_defaults{$attr}->{'default'}\"";
2241: }
2242: $result .= " />";
2243: return $result;
2244: }
2245:
2246: sub insert_axis{
2247: my $result;
2248: $result .= "\n <axis ";
2249: foreach my $attr (keys(%axis_defaults)) {
2250: $result .= "\n $attr=\"$axis_defaults{$attr}->{'default'}\"";
2251: }
2252: $result .= " />";
2253: return $result;
2254: }
2255:
2256: sub insert_title { return "\n <title></title>"; }
2257: sub insert_xlabel { return "\n <xlabel></xlabel>"; }
2258: sub insert_ylabel { return "\n <ylabel></ylabel>"; }
2259:
2260: sub insert_label {
2261: my $result;
2262: $result .= "\n <label ";
2263: foreach my $attr (keys(%label_defaults)) {
2264: $result .= "\n $attr=\"".
2265: $label_defaults{$attr}->{'default'}."\"";
2266: }
2267: $result .= "></label>";
2268: return $result;
2269: }
2270:
2271: sub insert_curve {
2272: my $result;
2273: $result .= "\n <curve ";
2274: foreach my $attr (keys(%curve_defaults)) {
2275: $result .= "\n $attr=\"".
2276: $curve_defaults{$attr}->{'default'}."\"";
2277: }
2278: $result .= " >";
2279: $result .= &insert_data().&insert_data()."\n </curve>";
2280: }
2281:
2282: sub insert_function {
2283: my $result;
2284: $result .= "\n <function></function>";
2285: return $result;
2286: }
2287:
2288: sub insert_data {
2289: my $result;
2290: $result .= "\n <data></data>";
2291: return $result;
2292: }
2293:
2294: ##----------------------------------------------------------------------
2295: 1;
2296: __END__
2297:
2298:
2299: =head1 NAME
2300:
2301: Apache::lonplot.pm
2302:
2303: =head1 SYNOPSIS
2304:
2305: XML-based plotter of graphs
2306:
2307: This is part of the LearningOnline Network with CAPA project
2308: described at http://www.lon-capa.org.
2309:
2310:
2311: =head1 SUBROUTINES (parsing and edit rendering)
2312:
2313: =over
2314:
2315: =item start_gnuplot()
2316:
2317: =item end_gnuplot()
2318:
2319: =item start_xtics()
2320:
2321: =item end_xtics()
2322:
2323: =item start_ytics()
2324:
2325: =item end_ytics()
2326:
2327: =item get_font()
2328:
2329: =item start_key()
2330:
2331: =item end_key()
2332:
2333: =item parse_label()
2334:
2335: =item replace_entities()
2336:
2337: =item start_title()
2338:
2339: =item end_title()
2340:
2341: =item start_xlabel()
2342:
2343: =item end_xlabel()
2344:
2345: =item start_ylabel()
2346:
2347: =item end_label()
2348:
2349: =item start_curve()
2350:
2351: =item end_curve()
2352:
2353: =item start_function()
2354:
2355: =item end_function()
2356:
2357: =item start_data()
2358:
2359: =item end_data()
2360:
2361: =item start_axis()
2362:
2363: =item end_axis
2364:
2365: =back
2366:
2367: =head1 SUBROUTINES (Utility)
2368:
2369: =over
2370:
2371: =item set_defaults()
2372:
2373: =item get_attributes()
2374:
2375: =item write_gnuplot_file()
2376:
2377: =item check_inputs()
2378:
2379: =item edit_attributes()
2380:
2381: =back
2382:
2383: =head1 SUBROUTINES (Insertion functions for editing plots)
2384:
2385: =over
2386:
2387: =item insert_gnuplot()
2388:
2389: =item insert_tics()
2390:
2391: =item insert_xtics()
2392:
2393: =item insert_key()
2394:
2395: =item insert_axis()
2396:
2397: =item insert_title()
2398:
2399: =item insert_xlabel()
2400:
2401: =item insert_ylabel()
2402:
2403: =item insert_label()
2404:
2405: =item insert_curve()
2406:
2407: =item insert_function()
2408:
2409: =item insert_data()
2410:
2411: =back
2412:
2413: =cut
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to lonplot.pm CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom / xml