1: # The LearningOnline Network with CAPA
2: # Dynamic plot
3: #
4: # $Id: lonplot.pm,v 1.171 2013/01/21 02:25:38 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
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 => 0,
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']
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 => $real_test,
421: description => 'Rotation of label (degrees)',
422: edit_type => 'entry',
423: size => '10',
424: }
425: );
426:
427: my @tic_edit_order = ('location','mirror','start','increment','end',
428: 'minorfreq');
429: my %tic_defaults =
430: (
431: location => {
432: default => 'border',
433: test => sub {$_[0]=~/^(border|axis)$/},
434: description => 'Location of major tic marks',
435: edit_type => 'choice',
436: choices => ['border','axis']
437: },
438: mirror => {
439: default => 'on',
440: test => $onoff_test,
441: description => 'Mirror tics on opposite axis?',
442: edit_type => 'onoff'
443: },
444: start => {
445: default => '-10.0',
446: test => $real_test,
447: description => 'Start major tics at',
448: edit_type => 'entry',
449: size => '10'
450: },
451: increment => {
452: default => '1.0',
453: test => $real_test,
454: description => 'Place a major tic every',
455: edit_type => 'entry',
456: size => '10'
457: },
458: end => {
459: default => ' 10.0',
460: test => $real_test,
461: description => 'Stop major tics at ',
462: edit_type => 'entry',
463: size => '10'
464: },
465: minorfreq => {
466: default => '0',
467: test => $int_test,
468: description => 'Number of minor tics per major tic mark',
469: edit_type => 'entry',
470: size => '10'
471: },
472: rotate => {
473: default => 'off',
474: test => $onoff_test,
475: description => 'Rotate tic label by 90 degrees if on',
476: edit_type => 'onoff'
477: }
478: );
479:
480: my @axis_edit_order = ('color','xmin','xmax','ymin','ymax','xformat', 'yformat', 'xzero', 'yzero');
481: my %axis_defaults =
482: (
483: color => {
484: default => 'x000000',
485: test => $color_test,
486: description => 'Color of grid lines (x000000)',
487: edit_type => 'entry',
488: size => '10',
489: class => 'colorchooser'
490: },
491: xmin => {
492: default => '-10.0',
493: test => $real_test,
494: description => 'Minimum x-value shown in plot',
495: edit_type => 'entry',
496: size => '10'
497: },
498: xmax => {
499: default => ' 10.0',
500: test => $real_test,
501: description => 'Maximum x-value shown in plot',
502: edit_type => 'entry',
503: size => '10'
504: },
505: ymin => {
506: default => '-10.0',
507: test => $real_test,
508: description => 'Minimum y-value shown in plot',
509: edit_type => 'entry',
510: size => '10'
511: },
512: ymax => {
513: default => ' 10.0',
514: test => $real_test,
515: description => 'Maximum y-value shown in plot',
516: edit_type => 'entry',
517: size => '10'
518: },
519: xformat => {
520: default => 'on',
521: test => sub {$_[0]=~/^(on|off|\d+(f|F|e|E))$/},
522: description => 'X-axis number formatting',
523: edit_type => 'choice',
524: choices => ['on', 'off', '2e', '2f'],
525: },
526: yformat => {
527: default => 'on',
528: test => sub {$_[0]=~/^(on|off|\d+(f|F|e|E))$/},
529: description => 'Y-axis number formatting',
530: edit_type => 'choice',
531: choices => ['on', 'off', '2e', '2f'],
532: },
533:
534: xzero => {
535: default => 'off',
536: test => sub {$_[0]=~/^(off|line|thick-line|dotted)$/},
537: description => 'Show x-zero (y=0) axis',
538: edit_type => 'choice',
539: choices => ['off', 'line', 'thick-line', 'dotted'],
540: },
541:
542: yzero => {
543: default => 'off',
544: test => sub {$_[0]=~/^(off|line|thick-line|dotted)$/},
545: description => 'Show y-zero (x=0) axis',
546: edit_type => 'choice',
547: choices => ['off', 'line', 'thick-line', 'dotted'],
548: },
549: );
550:
551:
552: my @curve_edit_order = ('color','name','linestyle','linewidth','linetype',
553: 'pointtype','pointsize','limit', 'arrowhead', 'arrowstyle',
554: 'arrowlength', 'arrowangle', 'arrowbackangle'
555: );
556:
557: my %curve_defaults =
558: (
559: color => {
560: default => 'x000000',
561: test => $color_test,
562: description => 'Color of curve (x000000)',
563: edit_type => 'entry',
564: size => '10',
565: class => 'colorchooser'
566: },
567: name => {
568: default => '',
569: test => $words_test,
570: description => 'Name of curve to appear in key',
571: edit_type => 'entry',
572: size => '20'
573: },
574: linestyle => {
575: default => 'lines',
576: test => $linestyle_test,
577: description => 'Plot with:',
578: edit_type => 'choice',
579: choices => [keys(%linestyles)]
580: },
581: linewidth => {
582: default => 1,
583: test => $int_test,
584: description => 'Line width (may not apply to all plot styles)',
585: edit_type => 'choice',
586: choices => [1,2,3,4,5,6,7,8,9,10]
587: },
588: linetype => {
589: default => 'solid',
590: test => sub {$_[0]=~/^(solid|dashed)$/},
591: description => 'Line type (may not apply to all plot styles)',
592: edit_type => 'choice',
593: choices => ['solid', 'dashed']
594: },
595: pointsize => {
596: default => 1,
597: test => $pos_real_test,
598: description => 'Point size (may not apply to all plot styles)',
599: edit_type => 'entry',
600: size => '5'
601: },
602: pointtype => {
603: default => 1,
604: test => $int_test,
605: description => 'Point type (may not apply to all plot styles)',
606: edit_type => 'choice',
607: choices => [0,1,2,3,4,5,6]
608: },
609: limit => {
610: default => 'closed',
611: test => sub {$_[0]=~/^(above|below|closed|x1|x2|y1|y2)$/},
612: description => 'Point to fill -- for filledcurves',
613: edit_type => 'choice',
614: choices => ['above', 'below', 'closed','x1','x2','y1','y2']
615: },
616: arrowhead => {
617: default => 'head',
618: test => $arrowhead_test,
619: description => 'Vector arrow head type',
620: edit_type => 'choice',
621: choices => ['nohead', 'head', 'heads']
622: },
623: arrowstyle => {
624: default => 'filled',
625: test => $arrowstyle_test,
626: description => 'Vector arrow head style',
627: edit_type => 'choice',
628: choices => ['filled', 'empty', 'nofilled']
629: },
630: arrowlength => {
631: default => 0.02,
632: test => $pos_real_test,
633: description => "Length of vector arrow (only applies to vector plots)",
634: edit_type => 'entry',
635: size => '5'
636: },
637: arrowangle => {
638: default => 10.0,
639: test => $degree_test,
640: description => 'Angle of arrow branches to arrow body (only applies to vector plots)',
641: edit_type => 'entry',
642: size => '5'
643: },
644:
645: arrowbackangle => {
646: default => 90.0,
647: test => $degree_test,
648: descripton => 'Angle of arrow back lines to branches.',
649: edit_type => 'entry',
650: size => '5'
651: }
652:
653: );
654:
655: ###################################################################
656: ## ##
657: ## parsing and edit rendering ##
658: ## ##
659: ###################################################################
660:
661: undef %Apache::lonplot::plot;
662: my (%key,%axis,$title,$xlabel,$ylabel,@labels,@curves,%xtics,%ytics);
663:
664: my $current_tics; # Reference to the current tick hash
665:
666: sub start_gnuplot {
667: undef(%Apache::lonplot::plot); undef(%key); undef(%axis);
668: undef($title); undef($xlabel); undef($ylabel);
669: undef(@labels); undef(@curves);
670: undef(%xtics); undef(%ytics);
671: #
672: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
673: my $result='';
674: &Apache::lonxml::register('Apache::lonplot',
675: ('title','xlabel','ylabel','key','axis','label','curve',
676: 'xtics','ytics'));
677: push (@Apache::lonxml::namespace,'lonplot');
678: if ($target eq 'web' || $target eq 'tex') {
679: &get_attributes(\%Apache::lonplot::plot,\%gnuplot_defaults,$parstack,$safeeval,
680: $tagstack->[-1]);
681: } elsif ($target eq 'edit') {
682: $result .= &Apache::edit::tag_start($target,$token,'GnuPlot');
683: $result .= &edit_attributes($target,$token,\%gnuplot_defaults,
684: \@gnuplot_edit_order)
685: .&Apache::edit::end_row()
686: .&Apache::edit::start_spanning_row();
687: } elsif ($target eq 'modified') {
688: my $constructtag=&Apache::edit::get_new_args
689: ($token,$parstack,$safeeval,keys(%gnuplot_defaults));
690:
691: if ($constructtag) {
692: #
693: # The color chooser does not prepent x to the color values
694: # Do that here:
695: #
696: foreach my $attribute ('bgcolor', 'fgcolor') {
697: my $value = $token->[2]{$attribute};
698: if (defined $value && !($value =~ /^x/)) {
699: $token->[2]{$attribute} = 'x' . $value;
700: }
701: }
702: $result = &Apache::edit::rebuild_tag($token);
703: }
704: }
705: return $result;
706: }
707:
708: sub end_gnuplot {
709: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
710: pop @Apache::lonxml::namespace;
711: &Apache::lonxml::deregister('Apache::lonplot',
712: ('title','xlabel','ylabel','key','axis','label','curve'));
713: my $result = '';
714: my $randnumber;
715: my $tmpdir =LONCAPA::tempdir(); # Where temporary files live:
716:
717: # need to call rand everytime start_script would evaluate, as the
718: # safe space rand number generator and the global rand generator
719: # are not separate
720: if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
721: $target eq 'answer') {
722: $randnumber=int(rand(1000));
723: }
724: if ($target eq 'web' || $target eq 'tex') {
725: &check_inputs(); # Make sure we have all the data we need
726: ##
727: ## Determine filename
728: my $filename = $env{'user.name'}.'_'.$env{'user.domain'}.
729: '_'.time.'_'.$$.$randnumber.'_plot';
730: ## Write the plot description to the file
731: &write_gnuplot_file($tmpdir,$filename,$target);
732: $filename = &escape($filename);
733: ## return image tag for the plot
734: if ($target eq 'web') {
735: $result .= <<"ENDIMAGE";
736: <img src = "/cgi-bin/plot.$weboutputformat?file=$filename.data"
737: width = "$Apache::lonplot::plot{'width'}"
738: height = "$Apache::lonplot::plot{'height'}"
739: align = "$Apache::lonplot::plot{'align'}"
740: alt = "$Apache::lonplot::plot{'alttag'}" />
741: ENDIMAGE
742: } elsif ($target eq 'tex') {
743: &Apache::lonxml::debug(" gnuplot wid = $Apache::lonplot::plot{'width'}");
744: &Apache::lonxml::debug(" gnuplot ht = $Apache::lonplot::plot{'height'}");
745: #might be inside the safe space, register the URL for later
746: &Apache::lonxml::register_ssi("/cgi-bin/plot.gif?file=$filename.data&output=eps");
747: $result = "%DYNAMICIMAGE:$Apache::lonplot::plot{'width'}:$Apache::lonplot::plot{'height'}:$Apache::lonplot::plot{'texwidth'}\n";
748: $result .= '\graphicspath{{'.$tmpdir.'}}'."\n";
749: $result .= '\includegraphics[width='.$Apache::lonplot::plot{'texwidth'}.' mm]{'.&unescape($filename).'.eps}';
750: }
751: } elsif ($target eq 'edit') {
752: $result.=&Apache::edit::tag_end($target,$token);
753: }
754: return $result;
755: }
756:
757:
758: ##--------------------------------------------------------------- xtics
759: sub start_xtics {
760: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
761: my $result='';
762: if ($target eq 'web' || $target eq 'tex') {
763: &get_attributes(\%xtics,\%tic_defaults,$parstack,$safeeval,
764: $tagstack->[-1]);
765: $current_tics = \%xtics;
766: &Apache::lonxml::register('Apache::lonplot', 'tic');
767: } elsif ($target eq 'edit') {
768: $result .= &Apache::edit::tag_start($target,$token,'xtics');
769: $result .= &edit_attributes($target,$token,\%tic_defaults,
770: \@tic_edit_order);
771: } elsif ($target eq 'modified') {
772: my $constructtag=&Apache::edit::get_new_args
773: ($token,$parstack,$safeeval,keys(%tic_defaults));
774: if ($constructtag) {
775: $result = &Apache::edit::rebuild_tag($token);
776: }
777: }
778: return $result;
779: }
780:
781: sub end_xtics {
782: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
783: my $result = '';
784: if ($target eq 'web' || $target eq 'tex') {
785: &Apache::lonxml::deregister('Apache::lonplot', 'tic');
786: } elsif ($target eq 'edit') {
787: $result.=&Apache::edit::tag_end($target,$token);
788: }
789: return $result;
790: }
791:
792: ##--------------------------------------------------------------- ytics
793: sub start_ytics {
794: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
795: my $result='';
796: if ($target eq 'web' || $target eq 'tex') {
797: &get_attributes(\%ytics,\%tic_defaults,$parstack,$safeeval,
798: $tagstack->[-1]);
799: $current_tics = \%ytics;
800: &Apache::lonxml::register('Apache::lonplot', 'tic');
801: } elsif ($target eq 'edit') {
802: $result .= &Apache::edit::tag_start($target,$token,'ytics');
803: $result .= &edit_attributes($target,$token,\%tic_defaults,
804: \@tic_edit_order);
805: } elsif ($target eq 'modified') {
806: my $constructtag=&Apache::edit::get_new_args
807: ($token,$parstack,$safeeval,keys(%tic_defaults));
808: if ($constructtag) {
809: $result = &Apache::edit::rebuild_tag($token);
810: }
811: }
812: return $result;
813: }
814:
815: sub end_ytics {
816: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
817: my $result = '';
818: if ($target eq 'web' || $target eq 'tex') {
819: &Apache::lonxml::deregister('Apache::lonplot', 'tic');
820: } elsif ($target eq 'edit') {
821: $result.=&Apache::edit::tag_end($target,$token);
822: }
823: return $result;
824: }
825:
826:
827: ##----------------------------------------------------------------
828: #
829: # Tic handling:
830: # The <tic> tag allows users to specify exact Tic positions and labels
831: # for each axis. In this version we only support level 0 tics (major tic).
832: # Each tic has associated with it a position and a label
833: # $current_tics is a reference to the current tick description hash.
834: # We add elements to an array in that has: ticspecs whose elements
835: # are 'pos' - the tick position and 'label' - the tic label.
836: #
837:
838:
839: sub start_tic {
840: my ($target, $token, $tagstack, $parstack, $parser, $safeeval, $style) = @_;
841:
842: my $result = '';
843: if ($target eq 'web' || $target eq 'tex') {
844: my $tic_location = &Apache::lonxml::get_param('location', $parstack, $safeeval);
845: my $tic_label = &Apache::lonxml::get_all_text('/tic', $parser);
846:
847: # Tic location must e a real:
848:
849: if (!&$real_test($tic_location)) {
850: &Apache::lonxml::warning("Tic location: $tic_location must be a real number");
851: } else {
852:
853: if (!defined $current_tics->{'ticspecs'}) {
854: $current_tics->{'ticspecs'} = [];
855: }
856: my $ticspecs = $current_tics->{'ticspecs'};
857: push (@$ticspecs, {'pos' => $tic_location, 'label' => $tic_label});
858: }
859: }
860:
861: return $result;
862: }
863:
864: sub end_tic {
865: return '';
866: }
867:
868: ##-----------------------------------------------------------------font
869: my %font_properties =
870: (
871: 'classic' => {
872: face => 'classic',
873: file => 'DejaVuSansMono-Bold',
874: printname => 'Helvetica',
875: tex_no_file => 1,
876: },
877: 'sans-serif' => {
878: face => 'sans-serif',
879: file => 'DejaVuSans',
880: printname => 'DejaVuSans',
881: },
882: 'serif' => {
883: face => 'serif',
884: file => 'DejaVuSerif',
885: printname => 'DejaVuSerif',
886: },
887: );
888:
889: sub get_font {
890: my ($target) = @_;
891: my ($size, $selected_font);
892:
893: if ( $Apache::lonplot::plot{'font'} =~ /^(small|medium|large)/) {
894: $selected_font = $font_properties{'classic'};
895: if ( $Apache::lonplot::plot{'font'} eq 'small') {
896: $size = '5';
897: } elsif ( $Apache::lonplot::plot{'font'} eq 'medium') {
898: $size = '9';
899: } elsif ( $Apache::lonplot::plot{'font'} eq 'large') {
900: $size = '11';
901: } else {
902: $size = '9';
903: }
904: } else {
905: $size = $Apache::lonplot::plot{'font'};
906: $selected_font = $font_properties{$Apache::lonplot::plot{'fontface'}};
907: }
908: if ($target eq 'tex' && defined($Apache::lonplot::plot{'texfont'})) {
909: # $selected_font = $font_properties{'classic'};
910: $size = $Apache::lonplot::plot{'texfont'};
911: }
912: return ($size, $selected_font);
913: }
914:
915: ##----------------------------------------------------------------- key
916: sub start_key {
917: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
918: my $result='';
919: if ($target eq 'web' || $target eq 'tex') {
920: &get_attributes(\%key,\%key_defaults,$parstack,$safeeval,
921: $tagstack->[-1]);
922: } elsif ($target eq 'edit') {
923: $result .= &Apache::edit::tag_start($target,$token,'Plot Key');
924: $result .= &edit_attributes($target,$token,\%key_defaults);
925: } elsif ($target eq 'modified') {
926: my $constructtag=&Apache::edit::get_new_args
927: ($token,$parstack,$safeeval,keys(%key_defaults));
928: if ($constructtag) {
929: $result = &Apache::edit::rebuild_tag($token);
930: }
931: }
932: return $result;
933: }
934:
935: sub end_key {
936: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
937: my $result = '';
938: if ($target eq 'web' || $target eq 'tex') {
939: } elsif ($target eq 'edit') {
940: $result.=&Apache::edit::tag_end($target,$token);
941: }
942: return $result;
943: }
944:
945: sub parse_label {
946: my ($target,$text) = @_;
947: my $parser=HTML::LCParser->new(\$text);
948: my $result;
949: while (my $token=$parser->get_token) {
950: if ($token->[0] eq 'S') {
951: if ($token->[1] eq 'sub') {
952: $result .= '_{';
953: } elsif ($token->[1] eq 'sup') {
954: $result .= '^{';
955: } else {
956: $result .= $token->[4];
957: }
958: } elsif ($token->[0] eq 'E') {
959: if ($token->[1] eq 'sub'
960: || $token->[1] eq 'sup') {
961: $result .= '}';
962: } else {
963: $result .= $token->[2];
964: }
965: } elsif ($token->[0] eq 'T') {
966: $result .= &replace_entities($target,$token->[1]);
967: }
968: }
969: return $result;
970: }
971:
972: #
973: # Note that there are severe restrictions on font selection in the
974: # ps driver now. later in life Gnuplot is supposed to support
975: # utf-8 fonts in the posts script driver. When this happens,
976: # the tex entries with comments that include the word <FIX>
977: # should be changed to print the correct glyphs rather than some
978: # approximation or fallback of what is intended.
979:
980: my %lookup =
981: ( # Greek alphabet:
982:
983: '(Alpha|#913)' => {'tex' => '{/Symbol A}', 'web' => "\x{391}"},
984: '(Beta|#914)' => {'tex' => '{/Symbol B}', 'web' => "\x{392}"},
985: '(Chi|#935)' => {'tex' => '{/Symbol C}', 'web' => "\x{3A7}"},
986: '(Delta|#916)' => {'tex' => '{/Symbol D}', 'web' => "\x{394}"},
987: '(Epsilon|#917)' => {'tex' => '{/Symbol E}', 'web' => "\x{395}"},
988: '(Phi|#934)' => {'tex' => '{/Symbol F}', 'web' => "\x{3A6}"},
989: '(Gamma|#915)' => {'tex' => '{/Symbol G}', 'web' => "\x{393}"},
990: '(Eta|#919)' => {'tex' => '{/Symbol H}', 'web' => "\x{397}"},
991: '(Iota|#921)' => {'tex' => '{/Symbol I}', 'web' => "\x{399}"},
992: '(Kappa|#922)' => {'tex' => '{/Symbol K}', 'web' => "\x{39A}"},
993: '(Lambda|#923)' => {'tex' => '{/Symbol L}', 'web' => "\x{39B}"},
994: '(Mu|#924)' => {'tex' => '{/Symbol M}', 'web' => "\x{39C}"},
995: '(Nu|#925)' => {'tex' => '{/Symbol N}', 'web' => "\x{39D}"},
996: '(Omicron|#927)' => {'tex' => '{/Symbol O}', 'web' => "\x{39F}"},
997: '(Pi|#928)' => {'tex' => '{/Symbol P}', 'web' => "\x{3A0}"},
998: '(Theta|#920)' => {'tex' => '{/Symbol Q}', 'web' => "\x{398}"},
999: '(Rho|#929)' => {'tex' => '{/Symbol R}', 'web' => "\x{3A1}"},
1000: '(Sigma|#931)' => {'tex' => '{/Symbol S}', 'web' => "\x{3A3}"},
1001: '(Tau|#932)' => {'tex' => '{/Symbol T}', 'web' => "\x{3A4}"},
1002: '(Upsilon|#933)' => {'tex' => '{/Symbol U}', 'web' => "\x{3A5}"},
1003: '(Omega|#937)' => {'tex' => '{/Symbol W}', 'web' => "\x{3A9}"},
1004: '(Xi|#926)' => {'tex' => '{/Symbol X}', 'web' => "\x{39E}"},
1005: '(Psi|#936)' => {'tex' => '{/Symbol Y}', 'web' => "\x{3A8}"},
1006: '(Zeta|#918)' => {'tex' => '{/Symbol Z}', 'web' => "\x{396}"},
1007: '(alpha|#945)' => {'tex' => '{/Symbol a}', 'web' => "\x{3B1}"},
1008: '(beta|#946)' => {'tex' => '{/Symbol b}', 'web' => "\x{3B2}"},
1009: '(chi|#967)' => {'tex' => '{/Symbol c}', 'web' => "\x{3C7}"},
1010: '(delta|#948)' => {'tex' => '{/Symbol d}', 'web' => "\x{3B4}"},
1011: '(epsilon|#949)' => {'tex' => '{/Symbol e}', 'web' => "\x{3B5}"},
1012: '(phi|#966)' => {'tex' => '{/Symbol f}', 'web' => "\x{3C6}"},
1013: '(gamma|#947)' => {'tex' => '{/Symbol g}', 'web' => "\x{3B3}"},
1014: '(eta|#951)' => {'tex' => '{/Symbol h}', 'web' => "\x{3B7}"},
1015: '(iota|#953)' => {'tex' => '{/Symbol i}', 'web' => "\x{3B9}"},
1016: '(kappa|#954)' => {'tex' => '{/Symbol k}', 'web' => "\x{3BA}"},
1017: '(lambda|#955)' => {'tex' => '{/Symbol k}', 'web' => "\x{3BB}"},
1018: '(mu|#956)' => {'tex' => '{/Symbol m}', 'web' => "\x{3BC}"},
1019: '(nu|#957)' => {'tex' => '{/Symbol n}', 'web' => "\x{3BD}"},
1020: '(omicron|#959)' => {'tex' => '{/Symbol o}', 'web' => "\x{3BF}"},
1021: '(pi|#960)' => {'tex' => '{/Symbol p}', 'web' => "\x{3C0}"},
1022: '(theta|#952)' => {'tex' => '{/Symbol q}', 'web' => "\x{3B8}"},
1023: '(rho|#961)' => {'tex' => '{/Symbol r}', 'web' => "\x{3C1}"},
1024: '(sigma|#963)' => {'tex' => '{/Symbol s}', 'web' => "\x{3C3}"},
1025: '(tau|#964)' => {'tex' => '{/Symbol t}', 'web' => "\x{3C4}"},
1026: '(upsilon|#965)' => {'tex' => '{/Symbol u}', 'web' => "\x{3C5}"},
1027: '(omega|#969)' => {'tex' => '{/Symbol w}', 'web' => "\x{3C9}"},
1028: '(xi|#958)' => {'tex' => '{/Symbol x}', 'web' => "\x{3BE}"},
1029: '(psi|#968)' => {'tex' => '{/Symbol y}', 'web' => "\x{3C8}"},
1030: '(zeta|#950)' => {'tex' => '{/Symbol z}', 'web' => "\x{3B6}"},
1031: '(thetasym|#977)' => {'tex' => '{/Symbol \165}', 'web' => "\x{3d1}"},
1032: '(upsih|#978)' => {'tex' => '{/Symbol \241}', 'web' => "\x{3d2}"},
1033: '(piv|#982)' => {'tex' => '{/Symbol \166}', 'web' => "\x{3d6}"},
1034:
1035:
1036: # Punctuation:
1037:
1038: '(quot|#034)' => {'tex' => '\42', 'web' => '\42'},
1039: '(amp|#038)' => {'tex' => '\46', 'web' => '\46'},
1040: '(lt|#060)' => {'tex' => '\74', 'web' => '\74'},
1041: '(gt|#062)' => {'tex' => '\76', 'web' => '\76'},
1042: '#131' => {'tex' => '{/Symbol \246}', 'web' => "\x{192}"},
1043: '#132' => {'tex' => '{/Text \271}', 'web' => "\x{201e}"},
1044: '#133' => {'tex' => '{/Symbol \274}', 'web'=> "\x{2026}"},
1045: '#134' => {'tex' => '{/Text \262}', 'web' => "\x{2020}"},
1046: '#135' => {'tex' => '{/Text \263}', 'web' => "\x{2021}"},
1047: '#136' => {'tex' => '\\\\^', 'web' => '\\\\^'},
1048: '#137' => {'tex' => '%o', 'web' => "\x{2030}"}, # Per Mille <FIX>
1049: '#138' => {'tex' => 'S', 'web' => "\x{160}"}, # S-Caron <FIX>
1050: '#139' => {'tex' => '<', 'web' => '<'},
1051: '#140' => {'tex' => 'AE', 'web' => "\x{152}"}, # AE ligature <FIX>
1052: '#145' => {'tex' => '\140', 'web' => "\x{2018}"},
1053: '#146' => {'tex' => '\47', 'web' => "\x{2019}"},
1054: '#147' => {'tex' => '\140\140', 'web' => "\x{201c}"}, # Left " <FIX>
1055: '#148' => {'tex' => '\47\47', 'web' => '\\"'}, # Right " <FIX>
1056: '#149' => {'tex' => '{/Symbol \267}', 'web' => "\x{2022}"},
1057: '#150' => {'tex' => '{/Text \55}', 'web' => "\x{2013}"}, # en dash
1058: '#151' => {'tex' => '{/Symbol \55}', 'web' => "\x{2014}"}, # em dash
1059: '#152' => {'tex' => '\\\\~', 'web' => '\\\\~'},
1060: '#153' => {'tex' => '{/Symbol \324}', 'web' => "\x{2122}"}, # trademark
1061:
1062: # Accented letters, and other furreign language glyphs.
1063:
1064: '#154' => {'tex' => 's', 'web' => "\x{161}"}, # small s-caron no ps.
1065: '#155' => {'tex' => '>', 'web' => '\76'}, # >
1066: '#156' => {'tex' => '{/Text \366}', 'web' => "\x{153}"}, # oe ligature.<FIX>
1067: '#159', => {'tex' => 'Y', 'web' => "\x{178}"}, # Y-umlaut - can't print <FIX>
1068: '(nbsp|#160)' => {'tex' => ' ', 'web' => ' '}, # non breaking space.
1069: '(iexcl|#161)' => {'tex' => '{/Text \241}', 'web' => "\x{a1}"}, # inverted !
1070: '(cent|#162)' => {'tex' => '{/Text \242}', 'web' => "\x{a2}"}, # Cent currency.
1071: '(pound|#163)' => {'tex' => '{/Text \243}', 'web' => "\x{a3}"}, # GB Pound currency.
1072: '(curren|#164)' => {'tex' => '{/ZapfDingbats \161}','web' => "\x{a4}"}, # Generic currency symb. <FIX>
1073: '(yen|#165)' => {'tex' => '{/Text \245}', 'web' => "\x{a5}"}, # Yen currency.
1074: '(brvbar|#166)' => {'tex' => '{/Symbol \174}', 'web' => "\x{a6}"}, # Broken vert bar no print.
1075: '(sect|#167)' => {'tex' => '{\247}', 'web' => "\x{a7}"}, # Section symbol.
1076: '(uml|#168)' => {'tex' => '{\250}', 'web' => "\x{a8}"}, # 'naked' umlaut.
1077: '(copy|#169)' => {'tex' => '{/Symbol \343}', 'web' => "\x{a9}"}, # Copyright symbol.
1078: '(ordf|#170)' => {'tex' => '{/Text \343}', 'web' => "\x{aa}"}, # Feminine ordinal.
1079: '(laquo|#171)' => {'tex' => '{/Text \253}', 'web' => "\x{ab}"}, # << quotes.
1080: '(not|#172)' => {'tex' => '\254', 'web' => "\x{ac}"}, # Logical not.
1081: '(shy|#173)' => {'tex' => '\255', 'web' => "\x{ad}"}, # soft hyphen.
1082: '(reg|#174)' => {'tex' => '{/Symbol \342}', 'web' => "\x{ae}"}, # Registered tm.
1083: '(macr|#175)' => {'tex' => '^{\255}', 'web' => "\x{af}"}, # 'naked' macron (overbar).
1084: '(deg|#176)' => {'tex' => '{/Text \260}', 'web' => "\x{b0}"}, # Degree symbo..`
1085: '(plusmn|#177)' => {'tex' => '{/Symbol \261}', 'web' => "\x{b1}"}, # +/- symbol.
1086: '(sup2|#178)' => {'tex' => '^2', 'web' => "\x{b2}"}, # Superscript 2.
1087: '(sup3|#179)' => {'tex' => '^3', 'web' => "\x{b3}"}, # Superscript 3.
1088: '(acute|#180)' => {'tex' => '{/Text \222}', 'web' => "\x{b4}"}, # 'naked' acute accent.
1089: '(micro|#181)' => {'tex' => '{/Symbol \155}', 'web' => "\x{b5}"}, # Micro (small mu).
1090: '(para|#182)' => {'tex' => '{/Text \266}', 'web' => "\x{b6}"}, # Paragraph symbol.
1091: '(middot|#183)' => {'tex' => '\267', 'web' => "\x{b7}"}, # middle dot
1092: '(cedil|#184)' => {'tex' => '\233', 'web' => "\x{b8}"}, # 'naked' cedilla.
1093: '(sup1|#185)' => {'tex' => '^1', 'web' => "\x{b9}"}, # superscript 1.
1094: '(ordm|#186)' => {'tex' => '{\260}', 'web' => "\x{ba}"}, # masculine ordinal.
1095: '(raquo|#187)', => {'tex' => '\273', 'web' => "\x{bb}"}, # Right angle quotes.
1096: '(frac14|#188)' => {'tex' => '\274', 'web' => "\x{bc}"}, # 1/4.
1097: '(frac12|#189)' => {'tex' => '\275', 'web' => "\x{bd}"}, # 1/2.
1098: '(frac34|#190)' => {'tex' => '\276', 'web' => "\x{be}"}, # 3/4
1099: '(iquest|#191)' => {'tex' => '{/Text \277}', 'web' => "\x{bf}"}, # Inverted ?
1100: '(Agrave|#192)' => {'tex' => '\300', 'web' => "\x{c0}"}, # A Grave.
1101: '(Aacute|#193)' => {'tex' => '\301', 'web' => "\x{c1}"}, # A Acute.
1102: '(Acirc|#194)' => {'tex' => '\302', 'web' => "\x{c2}"}, # A Circumflex.
1103: '(Atilde|#195)' => {'tex' => '\303', 'web' => "\x{c3}"}, # A tilde.
1104: '(Auml|#196)' => {'tex' => '\304', 'web' => "\x{c4}"}, # A umlaut.
1105: '(Aring|#197)' => {'tex' => '\305', 'web' => "\x{c5}"}, # A ring.
1106: '(AElig|#198)' => {'tex' => '\306', 'web' => "\x{c6}"}, # AE ligature.
1107: '(Ccedil|#199)' => {'tex' => '\307', 'web' => "\x{c7}"}, # C cedilla
1108: '(Egrave|#200)' => {'tex' => '\310', 'web' => "\x{c8}"}, # E Accent grave.
1109: '(Eacute|#201)' => {'tex' => '\311', 'web' => "\x{c9}"}, # E acute accent.
1110: '(Ecirc|#202)' => {'tex' => '\312', 'web' => "\x{ca}"}, # E Circumflex.
1111: '(Euml|#203)' => {'tex' => '\313', 'web' => "\x{cb}"}, # E umlaut.
1112: '(Igrave|#204)' => {'tex' => '\314', 'web' => "\x{cc}"}, # I grave accent.
1113: '(Iacute|#205)' => {'tex' => '\315', 'web' => "\x{cd}"}, # I acute accent.
1114: '(Icirc|#206)' => {'tex' => '\316', 'web' => "\x{ce}"}, # I circumflex.
1115: '(Iuml|#207)' => {'tex' => '\317', 'web' => "\x{cf}"}, # I umlaut.
1116: '(ETH|#208)' => {'tex' => '\320', 'web' => "\x{d0}"}, # Icelandic Cap eth.
1117: '(Ntilde|#209)' => {'tex' => '\321', 'web' => "\x{d1}"}, # Ntilde (enyan).
1118: '(Ograve|#210)' => {'tex' => '\322', 'web' => "\x{d2}"}, # O accent grave.
1119: '(Oacute|#211)' => {'tex' => '\323', 'web' => "\x{d3}"}, # O accent acute.
1120: '(Ocirc|#212)' => {'tex' => '\324', 'web' => "\x{d4}"}, # O circumflex.
1121: '(Otilde|#213)' => {'tex' => '\325', 'web' => "\x{d5}"}, # O tilde.
1122: '(Ouml|#214)' => {'tex' => '\326', 'web' => "\x{d6}"}, # O umlaut.
1123: '(times|#215)' => {'tex' => '\327', 'web' => "\x{d7}"}, # Times symbol.
1124: '(Oslash|#216)' => {'tex' => '\330', 'web' => "\x{d8}"}, # O slash.
1125: '(Ugrave|#217)' => {'tex' => '\331', 'web' => "\x{d9}"}, # U accent grave.
1126: '(Uacute|#218)' => {'tex' => '\332', 'web' => "\x{da}"}, # U accent acute.
1127: '(Ucirc|#219)' => {'tex' => '\333', 'web' => "\x{db}"}, # U circumflex.
1128: '(Uuml|#220)' => {'tex' => '\334', 'web' => "\x{dc}"}, # U umlaut.
1129: '(Yacute|#221)' => {'tex' => '\335', 'web' => "\x{dd}"}, # Y accent acute.
1130: '(THORN|#222)' => {'tex' => '\336', 'web' => "\x{de}"}, # Icelandic thorn.
1131: '(szlig|#223)' => {'tex' => '\337', 'web' => "\x{df}"}, # German sharfes s.
1132: '(agrave|#224)' => {'tex' => '\340', 'web' => "\x{e0}"}, # a accent grave.
1133: '(aacute|#225)' => {'tex' => '\341', 'web' => "\x{e1}"}, # a grave.
1134: '(acirc|#226)' => {'tex' => '\342', 'web' => "\x{e2}"}, # a circumflex.
1135: '(atilde|#227)' => {'tex' => '\343', 'web' => "\x{e3}"}, # a tilde.
1136: '(auml|#228)' => {'tex' => '\344', 'web' => "\x{e4}"}, # a umlaut
1137: '(aring|#229)' => {'tex' => '\345', 'web' => "\x{e5}"}, # a ring on top.
1138: '(aelig|#230)' => {'tex' => '\346', 'web' => "\x{e6}"}, # ae ligature.
1139: '(ccedil|#231)' => {'tex' => '\347', 'web' => "\x{e7}"}, # C cedilla
1140: '(egrave|#232)' => {'tex' => '\350', 'web' => "\x{e8}"}, # e accent grave.
1141: '(eacute|#233)' => {'tex' => '\351', 'web' => "\x{e9}"}, # e accent acute.
1142: '(ecirc|#234)' => {'tex' => '\352', 'web' => "\x{ea}" }, # e circumflex.
1143: '(euml|#235)' => {'tex' => '\353', 'web' => "\x{eb}"}, # e umlaut.
1144: '(igrave|#236)' => {'tex' => '\354', 'web' => "\x{ec}"}, # i grave.
1145: '(iacute|#237)' => {'tex' => '\355', 'web' => "\x{ed}"}, # i acute.
1146: '(icirc|#238)' => {'tex' => '\356', 'web' => "\x{ee}"}, # i circumflex.
1147: '(iuml|#239)' => {'tex' => '\357', 'web' => "\x{ef}"}, # i umlaut.
1148: '(eth|#240)' => {'tex' => '\360', 'web' => "\x{f0}"}, # Icelandic eth.
1149: '(ntilde|#241)' => {'tex' => '\361', 'web' => "\x{f1}"}, # n tilde.
1150: '(ograve|#242)' => {'tex' => '\362', 'web' => "\x{f2}"}, # o grave.
1151: '(oacute|#243)' => {'tex' => '\363', 'web' => "\x{f3}"}, # o acute.
1152: '(ocirc|#244)' => {'tex' => '\364', 'web' => "\x{f4}"}, # o circumflex.
1153: '(otilde|#245)' => {'tex' => '\365', 'web' => "\x{f5}"}, # o tilde.
1154: '(ouml|#246)' => {'tex' => '\366', 'web' => "\x{f6}"}, # o umlaut.
1155: '(divide|#247)' => {'tex' => '\367', 'web' => "\x{f7}"}, # division symbol
1156: '(oslash|#248)' => {'tex' => '\370', 'web' => "\x{f8}"}, # o slashed.
1157: '(ugrave|#249)' => {'tex' => '\371', 'web' => "\x{f9}"}, # u accent grave.
1158: '(uacute|#250)' => {'tex' => '\372', 'web' => "\x{fa}"}, # u acute.
1159: '(ucirc|#251)' => {'tex' => '\373', 'web' => "\x{fb}"}, # u circumflex.
1160: '(uuml|#252)' => {'tex' => '\374', 'web' => "\x{fc}"}, # u umlaut.
1161: '(yacute|#253)' => {'tex' => '\375', 'web' => "\x{fd}"}, # y acute accent.
1162: '(thorn|#254)' => {'tex' => '\376', 'web' => "\x{fe}"}, # small thorn (icelandic).
1163: '(yuml|#255)' => {'tex' => '\377', 'web' => "\x{ff}"}, # y umlaut.
1164:
1165: # Latin extended A entities:
1166:
1167: '(OElig|#338)' => {'tex' => '{/Text \326}', 'web' => "\x{152}"}, # OE ligature.
1168: '(oelig|#339)' => {'tex' => '{/Text \366}', 'web' => "\x{153}"}, # oe ligature.
1169: '(Scaron|#352)' => {'tex' => 'S', 'web' => "\x{160}"}, # S caron no printable.
1170: '(scaron|#353)' => {'tex' => 's', 'web' => "\x{161}"}, # s caron no printable.
1171: '(Yuml|#376)' => {'tex' => 'Y', 'web' => "\x{178}"}, # Y umlaut - no printable.
1172:
1173: # Latin extended B.
1174:
1175: '(fnof|#402)' => {'tex' =>'{/Symbol \246}', 'web' => "\x{192}"}, # f with little hook.
1176:
1177: # Standalone accents:
1178:
1179: '(circ|#710)' => {'tex' => '^', 'web' => '^'}, # circumflex.
1180: '(tilde|#732)' => {'tex' => '~', 'web' => '~'}, # tilde.
1181:
1182: # General punctuation. We're not able to make a distinction between
1183: # the various length spacings in the print version. (e.g. en/em/thin).
1184: # the various joiners will be empty strings in the print version too.
1185:
1186:
1187: '(ensp|#8194)' => {'tex' => ' ', 'web' => "\x{2002}"}, # en space.
1188: '(emsp|#8195)' => {'tex' => ' ', 'web' => "\x{2003}"}, # em space.
1189: '(thinsp|#8201)' => {'tex' => ' ', 'web' => "\x{2009}"}, # thin space.
1190: '(zwnj|#8204)' => {'tex' => ' ', 'web' => "\x{200c}"}, # Zero width non joiner.
1191: '(zwj|#8205)' => {'tex' => ' ', 'web' => "\x{200d}"}, # Zero width joiner.
1192: '(lrm|#8206)' => {'tex' => ' ', 'web' => "\x{200e}"}, # Left to right mark
1193: '(rlm|#8207)' => {'tex' => ' ', 'web' => "\x{200f}"}, # right to left mark.
1194: '(ndash|#8211)' => {'tex' => '{/Text \55}', 'web' => "\x{2013}"}, # en dash.
1195: '(mdash|#8212)' => {'tex' => '{/Symbol \55}', 'web' => "\x{2014}"}, # em dash.
1196: '(lsquo|#8216)' => {'tex' => '{/Text \140}', 'web' => "\x{2018}"}, # Left single quote.
1197: '(rsquo|#8217)' => {'tex' => '\47', 'web' => "\x{2019}"}, # Right single quote.
1198: '(sbquo|#8218)' => {'tex' => '\54', 'web' => "\x{201a}"}, # Single low-9 quote.
1199: '(ldquo|#8220)' => {'tex' => '\42', 'web' => "\x{201c}"}, # Left double quote.
1200: '(rdquo|#8221)' => {'tex' => '\42', 'web' => "\x{201d}"}, # Right double quote.
1201: '(bdquo|#8222)' => {'tex' => ',', 'web' => "\x{201e}"}, # Double low-9 quote.
1202: '(dagger|#8224)' => {'tex' => '+', 'web' => "\x{2020}"}, # Is this a dagger I see before me now?
1203: '(Dagger|#8225)' => {'tex' => '\261', 'web' => "\x{2021}"}, # it's handle pointing towards my heart?
1204: '(bull|#8226)' => {'tex' => '\267', 'web' => "\x{2022}"}, # Bullet.
1205: '(hellep|#8230)' => {'tex' => '{/Symbol \274}', 'web' => "\x{2026}"}, # Ellipses.
1206: '(permil|#8240)' => {'tex' => '%_o', 'web' => "\x{2031}"}, # Per mille.
1207: '(prime|#8242)' => {'tex' => '\264', 'web' => "\x{2032}"}, # Prime.
1208: '(Prime|#8243)' => {'tex' => '{/Symbol \262}', 'web' => "\x{2033}"}, # double prime.
1209: '(lsaquo|#8249)' => {'tex' => '<', 'web' => "\x{2039}"}, # < quote.
1210: '(rsaquo|#8250)' => {'tex' => '\74', 'web' => "\x{203a}"}, # > quote.
1211: '(oline|#8254)' => {'tex' => '{/Symbol \140}', 'web' => "\x{203e}"}, # Overline.
1212: '(frasl|#8260)' => {'tex' => '/', 'web' => "\x{2044}"}, # Fraction slash.
1213: '(euro|#8364)' => {'tex' => '{/Symbol \240}', 'web' => "\x{20ac}"}, # Euro currency.
1214:
1215: # Letter like symbols.
1216:
1217: '(weierp|#8472)' => {'tex' => '{/Symbol \303}', 'web' => "\x{2118}"}, # Power set symbol
1218: '(image|#8465)' => {'tex' => '{/Symbol \301}', 'web' => "\x{2111}"}, # Imaginary part
1219: '(real|#8476)' => {'tex' => '{/Symbol \302}', 'web' => "\x{211c}"}, # Real part.
1220: '(trade|#8482)' => {'tex' => '{/Symbol \344}', 'web' => "\x{2122}"}, # trademark symbol.
1221: '(alefsym|#8501)' => {'tex' => '{/Symbol \300}', 'web' => "\x{2135}"}, # Hebrew alef.
1222:
1223: # Arrows of various types and directions.
1224: '(larr|#8592)' => {'tex' => '{/Symbol \254}', 'web' => "\x{2190}"}, # <--
1225: '(uarr|#8593)' => {'tex' => '{/Symbol \255}', 'web' => "\x{2191}"}, # up arrow.
1226: '(rarr|#8594)' => {'tex' => '{/Symbol \256}', 'web' => "\x{2192}"}, # -->
1227: '(darr|#8595)' => {'tex' => '{/Symbol \257}', 'web' => "\x{2193}"}, # down arrow.
1228: '(harr|#8596)' => {'tex' => '{/Symbol \253}', 'web' => "\x{2194}"}, # <-->
1229: '(crarr|#8629)' => {'tex' => '{/Symbol \277}', 'web' => "\x{21b5}"}, # corner arrow down and right.
1230: '(lArr|#8656)' => {'tex' => '{/Symbol \334}', 'web' => "\x{21d0}"}, # <==
1231: '(uArr|#8657)' => {'tex' => '{/Symbol \335}', 'web' => "\x{21d1}"}, # Up double arrow.
1232: '(rArr|#8658)' => {'tex' => '{/Symbol \336}', 'web' => "\x{21d2}"}, # ==>
1233: '(dArr|#8659)' => {'tex' => '{/Symbol \337}', 'web' => "\x{21d3}"}, # Down double arrow.
1234: '(hArr|#8660)' => {'tex' => '{/Symbol \333}', 'web' => "\x{21d4}"}, # <==>
1235:
1236: # Mathematical operators. For some of these we do the best we can in printing.
1237:
1238: '(forall|#8704)' => {'tex' => '{/Symbol \42}', 'web' => "\x{2200}"}, # For all.
1239: '(part|#8706)' => {'tex' => '{/Symbol d}', 'web' => "\x{2202}"}, # partial derivative
1240: '(exist|#8707)' => {'tex' => '{/Symbol \44}', 'web' => "\x{2203}"}, # There exists.
1241: '(empty|#8709)' => {'tex' => '{/Symbol \306}', 'web' => "\x{2205}"}, # Null set.
1242: '(nabla|#8711)' => {'tex' => '{/Symbol \321}', 'web' => "\x{2207}"}, # Gradient e.g.
1243: '(isin|#8712)' => {'tex' => '{/Symbol \316}', 'web' => "\x{2208}"}, # Element of the set.
1244: '(notin|#8713)' => {'tex' => '{/Symbol \317}', 'web' => "\x{2209}"}, # Not an element of
1245: '(ni|#8715)' => {'tex' => '{/Symbol \47}', 'web' => "\x{220b}"}, # Contains as a member
1246: '(prod|#8719)' => {'tex' => '{/Symbol \325}', 'web' => "\x{220f}"}, # Product
1247: '(sum|#8721)' => {'tex' => '{/Symbol \345}', 'web' => "\x{2211}"}, # Sum of.
1248: '(minus|#8722)' => {'tex' => '{/Symbol \55}', 'web' => "\x{2212}"}, # - sign.
1249: '(lowast|#8727)' => {'tex' => '*', 'web' => "\x{2217}"}, # *
1250: '(radic|#8730)' => {'tex' => '{/Symbol \326}', 'web' => "\x{221a}"}, # Square root.
1251: '(prop|#8733)' => {'tex' => '{/Symbol \265}', 'web' => "\x{221d}"}, # Proportional to.
1252: '(infin|#8734)' => {'tex' => '{/Symbol \245}', 'web' => "\x{221e}"}, # Infinity.
1253: '(ang|#8736)' => {'tex' => '{/Symbol \320}', 'web' => "\x{2220}"}, # Angle .
1254: '(and|#8743)' => {'tex' => '{/Symbol \331}', 'web' => "\x{2227}"}, # Logical and.
1255: '(or|#8744)' => {'tex' => '{/Symbol \332}', 'web' => "\x{2228}"}, # Logical or.
1256: '(cap|#8745)' => {'tex' => '{/Symbol \307}', 'web' => "\x{2229}"}, # Set intersection.
1257: '(cup|#8746)' => {'tex' => '{/Symbol \310}', 'web' => "\x{222a}"}, # Set union.
1258: '(int|8747)' => {'tex' => '{/Symbol \362}', 'web' => "\x{222b}"}, # Integral.
1259:
1260: # Some gnuplot guru will have to explain to me why the next three
1261: # require the extra slashes... else they print very funkily.
1262:
1263: '(there4|#8756)' => {'tex' => '{/Symbol \\\134}', 'web' => "\x{2234}"}, # Therefore triple dots.
1264: '(sim|#8764)' => {'tex' => '\\\176', 'web' => "\x{223c}"}, # Simlar to.
1265: '(cong|#8773)' => {'tex' => '{/Symbol \\\100}','web' => "\x{2245}"}, # Congruent to/with.
1266:
1267: '(asymp|#8776)' => {'tex' => '{/Symbol \273}', 'web' => "\x{2248}"}, # Asymptotic to.
1268: '(ne|#8800)' => {'tex' => '{/Symbol \271}', 'web' => "\x{2260}"}, # not equal to.
1269: '(equiv|#8801)' => {'tex' => '{/Symbol \272}', 'web' => "\x{2261}"}, # Equivalent to.
1270: '(le|8804)' => {'tex' => '{/Symbol \243}', 'web' => "\x{2264}"}, # Less than or equal to.
1271: '(ge|8805)' => {'tex' => '{/Symbol \263}', 'web' => "\x{2265}"}, # Greater than or equal to
1272: '(sub|8834)' => {'tex' => '{/Symbol \314}', 'web' => "\x{2282}"}, # Subset of.
1273: '(sup|8835)' => {'tex' => '{/Symbol \311}', 'web' => "\x{2283}"}, # Super set of.
1274: '(nsub|8836)' => {'tex' => '{/Symbol \313}', 'web' => "\x{2284}"}, # not subset of.
1275: '(sube|8838)' => {'tex' => '{/Symbol \315}', 'web' => "\x{2286}"}, # Subset or equal.
1276: '(supe|8839)' => {'tex' => '{/Symbol \312}', 'web' => "\x{2287}"}, # Superset or equal
1277: '(oplus|8853)' => {'tex' => '{/Symbol \305}', 'web' => "\x{2295}"}, # O with plus inside
1278: '(otimes|8855)' => {'tex' => '{/Symbol \304}', 'web' => "\x{2297}"}, # O with times.
1279: '(perp|8869)' => {'tex' => '{/Symbol \136}', 'web' => "\x{22a5}"}, # Perpendicular.
1280: '(sdot|8901)' => {'tex' => '{/Symbol \227}', 'web' => "\x{22c5}"}, # Dot operator.
1281:
1282: # Misc. technical symbols:
1283:
1284: '(lceil|8698)' => {'tex' => '{/Symbol \351}', 'web' => "\x{2308}"}, # Left ceiling.
1285: '(rceil|8969)' => {'tex' => '{/Symbol \371}', 'web' => "\x{2309}"}, # Right ceiling.
1286: '(lfloor|8970)' => {'tex' => '{/Symbol \353}', 'web' => "\x{230a}"}, # Left floor.
1287: '(rfloor|8971)' => {'tex' => '{/Symbol \373}', 'web' => "\x{230b}"}, # Right floor.
1288:
1289: # The gnuplot png font evidently does not have the big angle brackets at
1290: # positions 0x2329, 0x232a so use ordinary brackets.
1291:
1292: '(lang|9001)' => {'tex' => '{/Symbol \341}', 'web' => '<'}, # Left angle bracket.
1293: '(rang|9002)' => {'tex' => '{/Symbol \361}', 'web' => '>'}, # Right angle bracket.
1294:
1295: # Gemoetric shapes.
1296:
1297: '(loz|9674)' => {'tex' => '{/Symbol \340}', 'web' => "\x{25ca}"}, # Lozenge.
1298:
1299: # Misc. symbols
1300:
1301: '(spades|9824)' => {'tex' => '{/Symbol \252}', 'web' => "\x{2660}"},
1302: '(clubs|9827)' => {'tex' => '{/Symbol \247}', 'web' => "\x{2663}"},
1303: '(hearts|9829)' => {'tex' => '{/Symbol \251}', 'web' => "\x{2665}"},
1304: '(diams|9830)' => {'tex' => '{/Symbol \250}', 'web' => "\x{2666}"}
1305:
1306: );
1307:
1308:
1309: sub replace_entities {
1310: my ($target,$text) = @_;
1311: $text =~ s{([_^~\{\}]|\\\\)}{\\\\$1}g;
1312: while (my ($re, $replace) = each(%lookup)) {
1313: my $repl = $replace->{$target};
1314: $text =~ s/&$re;/$replace->{$target}/g;
1315: }
1316: $text =~ s{(&)}{\\\\$1}g;
1317: return $text;
1318: }
1319:
1320: ##------------------------------------------------------------------- title
1321: sub start_title {
1322: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1323: my $result='';
1324: if ($target eq 'web' || $target eq 'tex') {
1325: $title = &Apache::lonxml::get_all_text("/title",$parser,$style);
1326: $title=&Apache::run::evaluate($title,$safeeval,$$parstack[-1]);
1327: $title =~ s/\n/ /g;
1328: if (length($title) > $max_str_len) {
1329: $title = substr($title,0,$max_str_len);
1330: }
1331: $title = &parse_label($target,$title);
1332: } elsif ($target eq 'edit') {
1333: $result.=&Apache::edit::tag_start($target,$token,'Plot Title');
1334: my $text=&Apache::lonxml::get_all_text("/title",$parser,$style);
1335: $result.=&Apache::edit::editline('',$text,'',60);
1336: } elsif ($target eq 'modified') {
1337: $result.=&Apache::edit::rebuild_tag($token);
1338: $result.=&Apache::edit::modifiedfield("/title",$parser);
1339: }
1340: return $result;
1341: }
1342:
1343: sub end_title {
1344: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1345: my $result = '';
1346: if ($target eq 'web' || $target eq 'tex') {
1347: } elsif ($target eq 'edit') {
1348: $result.=&Apache::edit::tag_end($target,$token);
1349: }
1350: return $result;
1351: }
1352: ##------------------------------------------------------------------- xlabel
1353: sub start_xlabel {
1354: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1355: my $result='';
1356: if ($target eq 'web' || $target eq 'tex') {
1357: $xlabel = &Apache::lonxml::get_all_text("/xlabel",$parser,$style);
1358: $xlabel=&Apache::run::evaluate($xlabel,$safeeval,$$parstack[-1]);
1359: $xlabel =~ s/\n/ /g;
1360: if (length($xlabel) > $max_str_len) {
1361: $xlabel = substr($xlabel,0,$max_str_len);
1362: }
1363: $xlabel = &parse_label($target,$xlabel);
1364: } elsif ($target eq 'edit') {
1365: $result.=&Apache::edit::tag_start($target,$token,'Plot Xlabel');
1366: my $text=&Apache::lonxml::get_all_text("/xlabel",$parser,$style);
1367: $result.=&Apache::edit::editline('',$text,'',60);
1368: } elsif ($target eq 'modified') {
1369: $result.=&Apache::edit::rebuild_tag($token);
1370: $result.=&Apache::edit::modifiedfield("/xlabel",$parser);
1371: }
1372: return $result;
1373: }
1374:
1375: sub end_xlabel {
1376: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1377: my $result = '';
1378: if ($target eq 'web' || $target eq 'tex') {
1379: } elsif ($target eq 'edit') {
1380: $result.=&Apache::edit::tag_end($target,$token);
1381: }
1382: return $result;
1383: }
1384:
1385: ##------------------------------------------------------------------- ylabel
1386: sub start_ylabel {
1387: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1388: my $result='';
1389: if ($target eq 'web' || $target eq 'tex') {
1390: $ylabel = &Apache::lonxml::get_all_text("/ylabel",$parser,$style);
1391: $ylabel = &Apache::run::evaluate($ylabel,$safeeval,$$parstack[-1]);
1392: $ylabel =~ s/\n/ /g;
1393: if (length($ylabel) > $max_str_len) {
1394: $ylabel = substr($ylabel,0,$max_str_len);
1395: }
1396: $ylabel = &parse_label($target,$ylabel);
1397: } elsif ($target eq 'edit') {
1398: $result .= &Apache::edit::tag_start($target,$token,'Plot Ylabel');
1399: my $text = &Apache::lonxml::get_all_text("/ylabel",$parser,$style);
1400: $result .= &Apache::edit::editline('',$text,'',60);
1401: } elsif ($target eq 'modified') {
1402: $result.=&Apache::edit::rebuild_tag($token);
1403: $result.=&Apache::edit::modifiedfield("/ylabel",$parser);
1404: }
1405: return $result;
1406: }
1407:
1408: sub end_ylabel {
1409: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1410: my $result = '';
1411: if ($target eq 'web' || $target eq 'tex') {
1412: } elsif ($target eq 'edit') {
1413: $result.=&Apache::edit::tag_end($target,$token);
1414: }
1415: return $result;
1416: }
1417:
1418: ##------------------------------------------------------------------- label
1419: sub start_label {
1420: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1421: my $result='';
1422: if ($target eq 'web' || $target eq 'tex') {
1423: my %label;
1424: &get_attributes(\%label,\%label_defaults,$parstack,$safeeval,
1425: $tagstack->[-1]);
1426: my $text = &Apache::lonxml::get_all_text("/label",$parser,$style);
1427: $text = &Apache::run::evaluate($text,$safeeval,$$parstack[-1]);
1428: $text =~ s/\n/ /g;
1429: $text = substr($text,0,$max_str_len) if (length($text) > $max_str_len);
1430: $label{'text'} = &parse_label($target,$text);
1431: push(@labels,\%label);
1432: } elsif ($target eq 'edit') {
1433: $result .= &Apache::edit::tag_start($target,$token,'Plot Label');
1434: $result .= &edit_attributes($target,$token,\%label_defaults);
1435: my $text = &Apache::lonxml::get_all_text("/label",$parser,$style);
1436: $result .= &Apache::edit::end_row().
1437: &Apache::edit::start_spanning_row().
1438: &Apache::edit::editline('',$text,'',60);
1439: } elsif ($target eq 'modified') {
1440: &Apache::edit::get_new_args
1441: ($token,$parstack,$safeeval,keys(%label_defaults));
1442: $result.=&Apache::edit::rebuild_tag($token);
1443: $result.=&Apache::edit::modifiedfield("/label",$parser);
1444: }
1445: return $result;
1446: }
1447:
1448: sub end_label {
1449: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1450: my $result = '';
1451: if ($target eq 'web' || $target eq 'tex') {
1452: } elsif ($target eq 'edit') {
1453: $result.=&Apache::edit::tag_end($target,$token);
1454: }
1455: return $result;
1456: }
1457:
1458: ##------------------------------------------------------------------- curve
1459: sub start_curve {
1460: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1461: my $result='';
1462: &Apache::lonxml::register('Apache::lonplot',('function','data'));
1463: push (@Apache::lonxml::namespace,'curve');
1464: if ($target eq 'web' || $target eq 'tex') {
1465: my %curve;
1466: &get_attributes(\%curve,\%curve_defaults,$parstack,$safeeval,
1467: $tagstack->[-1]);
1468: push (@curves,\%curve);
1469: } elsif ($target eq 'edit') {
1470: $result .= &Apache::edit::tag_start($target,$token,'Curve');
1471: $result .= &edit_attributes($target,$token,\%curve_defaults,
1472: \@curve_edit_order)
1473: .&Apache::edit::end_row()
1474: .&Apache::edit::start_spanning_row();
1475:
1476: } elsif ($target eq 'modified') {
1477: my $constructtag=&Apache::edit::get_new_args
1478: ($token,$parstack,$safeeval,keys(%curve_defaults));
1479: if ($constructtag) {
1480: #
1481: # Fix up the color attribute as jcolor does not prepend an x
1482: #
1483: my $value = $token->[2]{'color'};
1484: if (defined $value && !($value =~ /^x/)) {
1485: $token->[2]{'color'} = 'x' . $value;
1486: }
1487: $result = &Apache::edit::rebuild_tag($token);
1488: }
1489: }
1490: return $result;
1491: }
1492:
1493: sub end_curve {
1494: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1495: my $result = '';
1496: pop @Apache::lonxml::namespace;
1497: &Apache::lonxml::deregister('Apache::lonplot',('function','data'));
1498: if ($target eq 'web' || $target eq 'tex') {
1499: } elsif ($target eq 'edit') {
1500: $result.=&Apache::edit::tag_end($target,$token);
1501: }
1502: return $result;
1503: }
1504:
1505: ##------------------------------------------------------------ curve function
1506: sub start_function {
1507: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1508: my $result='';
1509: if ($target eq 'web' || $target eq 'tex') {
1510: if (exists($curves[-1]->{'data'})) {
1511: &Apache::lonxml::warning
1512: ('Use of the <b>curve function</b> tag precludes use of '.
1513: ' the <b>curve data</b> tag. '.
1514: 'The curve data tag will be omitted in favor of the '.
1515: 'curve function declaration.');
1516: delete $curves[-1]->{'data'} ;
1517: }
1518: my $function = &Apache::lonxml::get_all_text("/function",$parser,
1519: $style);
1520: $function = &Apache::run::evaluate($function,$safeeval,$$parstack[-1]);
1521: $function=~s/\^/\*\*/gs;
1522: $function=~ s/^\s+//; # Trim leading
1523: $function=~ s/\s+$//; # And trailing whitespace.
1524: $curves[-1]->{'function'} = $function;
1525: } elsif ($target eq 'edit') {
1526: $result .= &Apache::edit::tag_start($target,$token,'Gnuplot compatible curve function');
1527: my $text = &Apache::lonxml::get_all_text("/function",$parser,$style);
1528: $result .= &Apache::edit::editline('',$text,'',60);
1529: } elsif ($target eq 'modified') {
1530: $result.=&Apache::edit::rebuild_tag($token);
1531: $result.=&Apache::edit::modifiedfield("/function",$parser);
1532: }
1533: return $result;
1534: }
1535:
1536: sub end_function {
1537: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1538: my $result = '';
1539: if ($target eq 'web' || $target eq 'tex') {
1540: } elsif ($target eq 'edit') {
1541: $result .= &Apache::edit::end_table();
1542: }
1543: return $result;
1544: }
1545:
1546: ##------------------------------------------------------------ curve data
1547: sub start_data {
1548: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1549: my $result='';
1550: if ($target eq 'web' || $target eq 'tex') {
1551: if (exists($curves[-1]->{'function'})) {
1552: &Apache::lonxml::warning
1553: ('Use of the <b>curve function</b> tag precludes use of '.
1554: ' the <b>curve data</b> tag. '.
1555: 'The curve function tag will be omitted in favor of the '.
1556: 'curve data declaration.');
1557: delete($curves[-1]->{'function'});
1558: }
1559: my $datatext = &Apache::lonxml::get_all_text("/data",$parser,$style);
1560: $datatext=&Apache::run::evaluate($datatext,$safeeval,$$parstack[-1]);
1561: # Deal with cases where we're given an array...
1562: if ($datatext =~ /^\@/) {
1563: $datatext = &Apache::run::run('return "'.$datatext.'"',
1564: $safeeval,1);
1565: }
1566: $datatext =~ s/\s+/ /g;
1567: # Need to do some error checking on the @data array -
1568: # make sure it's all numbers and make sure each array
1569: # is of the same length.
1570: my @data;
1571: if ($datatext =~ /,/) { # comma deliminated
1572: @data = split /,/,$datatext;
1573: } else { # Assume it's space separated.
1574: @data = split / /,$datatext;
1575: }
1576: for (my $i=0;$i<=$#data;$i++) {
1577: # Check that it's non-empty
1578: if (! defined($data[$i])) {
1579: &Apache::lonxml::warning(
1580: 'undefined curve data value. Replacing with '.
1581: ' pi/e = 1.15572734979092');
1582: $data[$i] = 1.15572734979092;
1583: }
1584: # Check that it's a number
1585: if (! &$real_test($data[$i]) & ! &$int_test($data[$i])) {
1586: &Apache::lonxml::warning(
1587: 'Bad curve data value of '.$data[$i].' Replacing with '.
1588: ' pi/e = 1.15572734979092');
1589: $data[$i] = 1.15572734979092;
1590: }
1591: }
1592: # complain if the number of data points is not the same as
1593: # in previous sets of data.
1594: if (($curves[-1]->{'data'}) && ($#data != $#{$curves[-1]->{'data'}->[0]})){
1595: &Apache::lonxml::warning
1596: ('Number of data points is not consistent with previous '.
1597: 'number of data points');
1598: }
1599: push @{$curves[-1]->{'data'}},\@data;
1600: } elsif ($target eq 'edit') {
1601: $result .= &Apache::edit::tag_start($target,$token,'Comma or space deliminated curve data');
1602: my $text = &Apache::lonxml::get_all_text("/data",$parser,$style);
1603: $result .= &Apache::edit::editline('',$text,'',60);
1604: } elsif ($target eq 'modified') {
1605: $result.=&Apache::edit::rebuild_tag($token);
1606: $result.=&Apache::edit::modifiedfield("/data",$parser);
1607: }
1608: return $result;
1609: }
1610:
1611: sub end_data {
1612: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1613: my $result = '';
1614: if ($target eq 'web' || $target eq 'tex') {
1615: } elsif ($target eq 'edit') {
1616: $result .= &Apache::edit::end_table();
1617: }
1618: return $result;
1619: }
1620:
1621: ##------------------------------------------------------------------- axis
1622: sub start_axis {
1623: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1624: my $result='';
1625: if ($target eq 'web' || $target eq 'tex') {
1626: &get_attributes(\%axis,\%axis_defaults,$parstack,$safeeval,
1627: $tagstack->[-1]);
1628: } elsif ($target eq 'edit') {
1629: $result .= &Apache::edit::tag_start($target,$token,'Plot Axes');
1630: $result .= &edit_attributes($target,$token,\%axis_defaults,
1631: \@axis_edit_order);
1632: } elsif ($target eq 'modified') {
1633: my $constructtag=&Apache::edit::get_new_args
1634: ($token,$parstack,$safeeval,keys(%axis_defaults));
1635:
1636: if ($constructtag) {
1637: #
1638: # Fix up the color attribute since jchooser does not
1639: # prepend an x to the color:
1640: #
1641: my $value = $token->[2]{'color'};
1642: if (defined $value && !($value =~ /^x/)) {
1643: $token->[2]{'color'} = 'x' . $value;
1644: }
1645:
1646: $result = &Apache::edit::rebuild_tag($token);
1647: }
1648: }
1649: return $result;
1650: }
1651:
1652: sub end_axis {
1653: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1654: my $result = '';
1655: if ($target eq 'web' || $target eq 'tex') {
1656: } elsif ($target eq 'edit') {
1657: $result.=&Apache::edit::tag_end($target,$token);
1658: } elsif ($target eq 'modified') {
1659: }
1660: return $result;
1661: }
1662:
1663: ###################################################################
1664: ## ##
1665: ## Utility Functions ##
1666: ## ##
1667: ###################################################################
1668:
1669: ##----------------------------------------------------------- set_defaults
1670: sub set_defaults {
1671: my ($var,$defaults) = @_;
1672: my $key;
1673: foreach $key (keys(%$defaults)) {
1674: $var->{$key} = $defaults->{$key}->{'default'};
1675: }
1676: }
1677:
1678: ##------------------------------------------------------------------- misc
1679: sub get_attributes{
1680: my ($values,$defaults,$parstack,$safeeval,$tag) = @_;
1681: foreach my $attr (keys(%{$defaults})) {
1682: if ($attr eq 'texwidth' || $attr eq 'texfont') {
1683: $values->{$attr} =
1684: &Apache::lonxml::get_param($attr,$parstack,$safeeval,undef,1);
1685: } else {
1686: $values->{$attr} =
1687: &Apache::lonxml::get_param($attr,$parstack,$safeeval);
1688: }
1689: if ($values->{$attr} eq '' | !defined($values->{$attr})) {
1690: $values->{$attr} = $defaults->{$attr}->{'default'};
1691: next;
1692: }
1693: my $test = $defaults->{$attr}->{'test'};
1694: if (! &$test($values->{$attr})) {
1695: &Apache::lonxml::warning
1696: ($tag.':'.$attr.': Bad value.'.'Replacing your value with : '
1697: .$defaults->{$attr}->{'default'} );
1698: $values->{$attr} = $defaults->{$attr}->{'default'};
1699: }
1700: }
1701: return ;
1702: }
1703: ##
1704: # Generate tic mark specifications.
1705: #
1706: # @param type - type of tics (xtics or ytics).
1707: # @param spec - Reference to a hash that contains the tic specification.
1708: # @param target - 'tex' if hard copy target.
1709: #
1710: # @return string - the tic specification command.
1711: #
1712: sub generate_tics {
1713: my ($type, $spec, $target) = @_;
1714: my $result = '';
1715:
1716:
1717: if (defined %$spec) {
1718:
1719:
1720:
1721: # Major tics: - If there are 'ticspecs' these override any other
1722: # specifications:
1723:
1724:
1725:
1726: $result .= "set $type $spec->{'location'} ";
1727: $result .= ($spec->{'mirror'} eq 'on') ? 'mirror ' : 'nomirror ';
1728: if ($spec->{'rotate'} eq 'on') {
1729: $result .= ' rotate ';
1730: }
1731: if (defined $spec->{'ticspecs'}) {
1732: $result .= '( ';
1733: my @ticspecs;
1734: my $ticinfo = $spec->{'ticspecs'};
1735: foreach my $tic (@$ticinfo) {
1736: push(@ticspecs, '"' . $tic->{'label'} . '" ' . $tic->{'pos'} );
1737: }
1738: $result .= join(', ', (@ticspecs));
1739: $result .= ' )';
1740: } else {
1741: $result .= "$spec->{'start'}, ";
1742: $result .= "$spec->{'increment'}, ";
1743: $result .= "$spec->{'end'} ";
1744: }
1745: if ($target eq 'tex' ) {
1746: $result .= 'font "Helvetica,22"';
1747: }
1748: $result .= "\n";
1749:
1750: # minor frequency:
1751:
1752: if ($spec->{'minorfreq'} != 0) {
1753: $result .= "set m$type $spec->{'minorfreq'}\n";
1754: }
1755: } elsif ($target eq 'tex' ) {
1756: $result .= "set $type font " . '"Helvetica,22"' ."\n";
1757: }
1758:
1759:
1760: return $result;
1761: }
1762:
1763: ##------------------------------------------------------- write_gnuplot_file
1764: sub write_gnuplot_file {
1765: my ($tmpdir,$filename,$target)= @_;
1766: my ($fontsize, $font_properties) = &get_font($target);
1767: my $gnuplot_input = '';
1768: my $curve;
1769: #
1770: # Check to be sure we do not have any empty curves
1771: my @curvescopy;
1772: foreach my $curve (@curves) {
1773: if (exists($curve->{'function'})) {
1774: if ($curve->{'function'} !~ /^\s*$/) {
1775: push(@curvescopy,$curve);
1776: }
1777: } elsif (exists($curve->{'data'})) {
1778: foreach my $data (@{$curve->{'data'}}) {
1779: if (scalar(@$data) > 0) {
1780: push(@curvescopy,$curve);
1781: last;
1782: }
1783: }
1784: }
1785: }
1786: @curves = @curvescopy;
1787: # Collect all the colors
1788: my @Colors;
1789: push @Colors, $Apache::lonplot::plot{'bgcolor'};
1790: push @Colors, $Apache::lonplot::plot{'fgcolor'};
1791: push @Colors, (defined($axis{'color'})?$axis{'color'}:$Apache::lonplot::plot{'fgcolor'});
1792: foreach $curve (@curves) {
1793: push @Colors, ($curve->{'color'} ne '' ?
1794: $curve->{'color'} :
1795: $Apache::lonplot::plot{'fgcolor'} );
1796: }
1797:
1798: # set term
1799: if ($target eq 'web') {
1800: $gnuplot_input .= 'set terminal png enhanced nocrop ';
1801: $gnuplot_input .= 'transparent ' if ($Apache::lonplot::plot{'transparent'} eq 'on');
1802: $gnuplot_input .= 'font "'.$Apache::lonnet::perlvar{'lonFontsDir'}.
1803: '/'.$font_properties->{'file'}.'.ttf" ';
1804: $gnuplot_input .= $fontsize;
1805: $gnuplot_input .= ' size '.$Apache::lonplot::plot{'width'}.','.$Apache::lonplot::plot{'height'}.' ';
1806: $gnuplot_input .= "@Colors\n";
1807: # set output
1808: $gnuplot_input .= "set output\n";
1809: } elsif ($target eq 'tex') {
1810: $gnuplot_input .= "set term postscript eps enhanced $Apache::lonplot::plot{'plotcolor'} dash ";
1811: if (!$font_properties->{'tex_no_file'}) {
1812: $gnuplot_input .=
1813: 'fontfile "'.$Apache::lonnet::perlvar{'lonFontsDir'}.
1814: '/'.$font_properties->{'file'}.'.pfb" ';
1815: }
1816: $gnuplot_input .= ' "'.$font_properties->{'printname'}.'" ';
1817: $gnuplot_input .= $fontsize;
1818: $gnuplot_input .= "\nset output \"".$tmpdir.
1819: &unescape($filename).".eps\"\n";
1820: $gnuplot_input .= "set encoding iso_8859_1\n"; # Get access to extended font.
1821:
1822: }
1823: $gnuplot_input .= "set encoding utf8\n";
1824: # cartesian or polar plot?
1825: if (lc($Apache::lonplot::plot{'plottype'}) eq 'polar') {
1826: $gnuplot_input .= 'set polar'.$/;
1827: } else {
1828: # Assume Cartesian
1829: }
1830: # cartesian or polar grid?
1831: if (lc($Apache::lonplot::plot{'gridtype'}) eq 'polar') {
1832: $gnuplot_input .= 'set grid polar'.$/;
1833: } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'linear-log') {
1834: $gnuplot_input .= 'set logscale x'.$/;
1835: } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'log-linear') {
1836: $gnuplot_input .= 'set logscale y'.$/;
1837: } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'log-log') {
1838: $gnuplot_input .= 'set logscale x'.$/;
1839: $gnuplot_input .= 'set logscale y'.$/;
1840: } else {
1841: # Assume Cartesian
1842: }
1843: # solid or pattern for boxes?
1844: if (lc($Apache::lonplot::plot{'fillstyle'}) eq 'solid') {
1845: $gnuplot_input .= 'set style fill solid '.
1846: $Apache::lonplot::plot{'solid'}.$Apache::lonplot::plot{'box_border'}.$/;
1847: } elsif (lc($Apache::lonplot::plot{'fillstyle'}) eq 'pattern') {
1848: $gnuplot_input .= 'set style fill pattern '.$Apache::lonplot::plot{'pattern'}.$Apache::lonplot::plot{'box_border'}.$/;
1849: } elsif (lc($Apache::lonplot::plot{'fillstyle'}) eq 'empty') {
1850: }
1851: # margin
1852: if (lc($Apache::lonplot::plot{'lmargin'}) ne 'default') {
1853: $gnuplot_input .= 'set lmargin '.$Apache::lonplot::plot{'lmargin'}.$/;
1854: }
1855: if (lc($Apache::lonplot::plot{'rmargin'}) ne 'default') {
1856: $gnuplot_input .= 'set rmargin '.$Apache::lonplot::plot{'rmargin'}.$/;
1857: }
1858: if (lc($Apache::lonplot::plot{'tmargin'}) ne 'default') {
1859: $gnuplot_input .= 'set tmargin '.$Apache::lonplot::plot{'tmargin'}.$/;
1860: }
1861: if (lc($Apache::lonplot::plot{'bmargin'}) ne 'default') {
1862: $gnuplot_input .= 'set bmargin '.$Apache::lonplot::plot{'bmargin'}.$/;
1863: }
1864:
1865: # tic scales
1866: if ($version > 4) {
1867: $gnuplot_input .= 'set tics scale '.
1868: $Apache::lonplot::plot{'major_ticscale'}.', '.$Apache::lonplot::plot{'minor_ticscale'}.$/;
1869: } else {
1870: $gnuplot_input .= 'set ticscale '.
1871: $Apache::lonplot::plot{'major_ticscale'}.' '.$Apache::lonplot::plot{'minor_ticscale'}.$/;
1872: }
1873: #boxwidth
1874: if (lc($Apache::lonplot::plot{'boxwidth'}) ne '') {
1875: $gnuplot_input .= 'set boxwidth '.$Apache::lonplot::plot{'boxwidth'}.$/;
1876: }
1877: # gridlayer
1878: $gnuplot_input .= 'set grid noxtics noytics front '.$/
1879: if ($Apache::lonplot::plot{'gridlayer'} eq 'on');
1880:
1881: # grid
1882: $gnuplot_input .= 'set grid'.$/ if ($Apache::lonplot::plot{'grid'} eq 'on');
1883: # border
1884: $gnuplot_input .= ($Apache::lonplot::plot{'border'} eq 'on'?
1885: 'set border'.$/ :
1886: 'set noborder'.$/ );
1887: # sampling rate for non-data curves
1888: $gnuplot_input .= "set samples $Apache::lonplot::plot{'samples'}\n";
1889: # title, xlabel, ylabel
1890: # titles
1891: my $extra_space_x = ($xtics{'location'} eq 'axis') ? ' offset 0, -0.5 ' : '';
1892: my $extra_space_y = ($ytics{'location'} eq 'axis') ? ' offset -0.5, 0 ' : '';
1893:
1894: if ($target eq 'tex') {
1895: $gnuplot_input .= "set title \"$title\" font \"".$font_properties->{'printname'}.",".$fontsize."pt\"\n" if (defined($title)) ;
1896: $gnuplot_input .= "set xlabel \"$xlabel\" $extra_space_x font \"".$font_properties->{'printname'}.",".$fontsize."pt\"\n" if (defined($xlabel));
1897: $gnuplot_input .= "set ylabel \"$ylabel\" $extra_space_y font \"".$font_properties->{'printname'}.",".$fontsize."pt\"\n" if (defined($ylabel));
1898: } else {
1899: $gnuplot_input .= "set title \"$title\" \n" if (defined($title)) ;
1900: $gnuplot_input .= "set xlabel \"$xlabel\" $extra_space_x \n" if (defined($xlabel));
1901: $gnuplot_input .= "set ylabel \"$ylabel\" $extra_space_y \n" if (defined($ylabel));
1902: }
1903: # tics
1904: $gnuplot_input .= &generate_tics('xtics', \%xtics, $target);
1905:
1906: $gnuplot_input .= &generate_tics('ytics', \%ytics, $target);
1907:
1908: # axis
1909: if (%axis) {
1910: if ($axis{'xformat'} ne 'on') {
1911: $gnuplot_input .= "set format x ";
1912: if ($axis{'xformat'} eq 'off') {
1913: $gnuplot_input .= "\"\"\n";
1914: } else {
1915: $gnuplot_input .= "\"\%.".$axis{'xformat'}."\"\n";
1916: }
1917: }
1918: if ($axis{'yformat'} ne 'on') {
1919: $gnuplot_input .= "set format y ";
1920: if ($axis{'yformat'} eq 'off') {
1921: $gnuplot_input .= "\"\"\n";
1922: } else {
1923: $gnuplot_input .= "\"\%.".$axis{'yformat'}."\"\n";
1924: }
1925: }
1926: $gnuplot_input .= "set xrange \[$axis{'xmin'}:$axis{'xmax'}\]\n";
1927: $gnuplot_input .= "set yrange \[$axis{'ymin'}:$axis{'ymax'}\]\n";
1928: if ($axis{'xzero'} ne 'off') {
1929: $gnuplot_input .= "set xzeroaxis ";
1930: if ($axis{'xzero'} eq 'line' || $axis{'xzero'} eq 'thick-line') {
1931: $gnuplot_input .= "lt -1 ";
1932: if ($axis{'xzero'} eq 'thick-line') {
1933: $gnuplot_input .= "lw 3 ";
1934: }
1935: }
1936: $gnuplot_input .= "\n";
1937: }
1938: if ($axis{'yzero'} ne 'off') {
1939: $gnuplot_input .= "set yzeroaxis ";
1940: if ($axis{'yzero'} eq 'line' || $axis{'yzero'} eq 'thick-line') {
1941: $gnuplot_input .= "lt -1 ";
1942: if ($axis{'yzero'} eq 'thick-line') {
1943: $gnuplot_input .= "lw 3 ";
1944: }
1945: }
1946: $gnuplot_input .= "\n";
1947: }
1948: }
1949: # Key
1950: if (%key) {
1951: $gnuplot_input .= 'set key '.$key{'pos'}.' ';
1952: if ($key{'title'} ne '') {
1953: $gnuplot_input .= 'title "'.$key{'title'}.'" ';
1954: }
1955: $gnuplot_input .= ($key{'box'} eq 'on' ? 'box ' : 'nobox ').$/;
1956: } else {
1957: $gnuplot_input .= 'set nokey'.$/;
1958: }
1959: # labels
1960: my $label;
1961: foreach $label (@labels) {
1962: $gnuplot_input .= 'set label "'.$label->{'text'}.'" at '.
1963: $label->{'xpos'}.','.$label->{'ypos'};
1964: if ($label->{'rotate'} ne '') {
1965: $gnuplot_input .= ' rotate by '.$label->{'rotate'};
1966: }
1967: $gnuplot_input .= ' '.$label->{'justify'};
1968:
1969: if ($target eq 'tex') {
1970: $gnuplot_input .=' font "'.$font_properties->{'printname'}.','.$fontsize.'pt"' ;
1971: }
1972: $gnuplot_input .= $/;
1973: }
1974: if ($target eq 'tex') {
1975: $gnuplot_input .="set size 1,".$Apache::lonplot::plot{'height'}/$Apache::lonplot::plot{'width'}*1.38;
1976: $gnuplot_input .="\n";
1977: }
1978: # curves
1979: #
1980: # Each curve will have its very own linestyle.
1981: # (This should work just fine in web rendition I think).
1982: # The line_xxx variables will hold the elements of the line style.
1983: # type (solid/dashed), color, width
1984: #
1985: my $linestyle_index = 50;
1986: my $line_width = '';
1987: my $plots;
1988:
1989: # If arrows are needed there will be an arrow style for each as well:
1990: #
1991:
1992: my $arrow_style_index = 50;
1993:
1994: for (my $i = 0;$i<=$#curves;$i++) {
1995: $curve = $curves[$i];
1996: my $plot_command;
1997: my $plot_type = ', ' if ($i > 0);
1998: if ($target eq 'tex') {
1999: $curve->{'linewidth'} *= 2;
2000: }
2001: $line_width = $curve->{'linewidth'};
2002: if (exists($curve->{'function'})) {
2003: $plot_type .=
2004: $curve->{'function'}.' title "'.
2005: $curve->{'name'}.'" with '.
2006: $curve->{'linestyle'};
2007: } elsif (exists($curve->{'data'})) {
2008: # Store data values in $datatext
2009: my $datatext = '';
2010: # get new filename
2011: my $datafilename = "$tmpdir/$filename.data.$i";
2012: my $fh=Apache::File->new(">$datafilename");
2013: # Compile data
2014: my @Data = @{$curve->{'data'}};
2015: my @Data0 = @{$Data[0]};
2016: for (my $i =0; $i<=$#Data0; $i++) {
2017: my $dataset;
2018: foreach $dataset (@Data) {
2019: $datatext .= $dataset->[$i] . ' ';
2020: }
2021: $datatext .= $/;
2022: }
2023: # write file
2024: print $fh $datatext;
2025: close($fh);
2026: # generate gnuplot text
2027: $plot_type .= '"'.$datafilename.'" title "'.
2028: $curve->{'name'}.'" with '.
2029: $curve->{'linestyle'};
2030: }
2031: my $pointtype = '';
2032: my $pointsize = '';
2033:
2034: # Figure out the linestyle:
2035:
2036: my $lt = $curve->{'linetype'} ne '' ? $curve->{'linetype'}
2037: : 'solid'; # Line type defaults to solid.
2038: # The mapping of lt -> the actual gnuplot line type depends on the target:
2039:
2040: if ($target eq 'tex') {
2041: $lt = $ps_linetypes{$lt};
2042: } else {
2043: $lt = $linetypes{$lt}
2044: }
2045:
2046: my $color = $curve->{'color'};
2047: $color =~ s/^x/#/; # Convert xhex color -> #hex color.
2048:
2049:
2050: if (($curve->{'linestyle'} eq 'points') ||
2051: ($curve->{'linestyle'} eq 'linespoints') ||
2052: ($curve->{'linestyle'} eq 'errorbars') ||
2053: ($curve->{'linestyle'} eq 'xerrorbars') ||
2054: ($curve->{'linestyle'} eq 'yerrorbars') ||
2055: ($curve->{'linestyle'} eq 'xyerrorbars')) {
2056:
2057: $pointtype =' pointtype '.$curve->{'pointtype'};
2058: $pointsize =' pointsize '.$curve->{'pointsize'};
2059: } elsif ($curve->{'linestyle'} eq 'filledcurves') {
2060: $plot_command.= ' '.$curve->{'limit'};
2061: } elsif ($curve->{'linestyle'} eq 'vector') {
2062:
2063: # Create the arrow head style add it to
2064: # $gnuplot_input..and ensure it gets
2065: # Selected in the plot command.
2066:
2067: $gnuplot_input .= "set style arrow $arrow_style_index ";
2068: $gnuplot_input .= ' ' . $curve->{'arrowhead'};
2069: $gnuplot_input .= ' size ' . $curve->{'arrowlength'};
2070: $gnuplot_input .= ','.$curve->{'arrowangle'};
2071: $gnuplot_input .= ',' . $curve->{'arrowbackangle'};
2072: $gnuplot_input .= ' ' . $curve->{'arrowstyle'} . " ls $linestyle_index\n";
2073:
2074:
2075: $plot_command .= " arrowstyle $arrow_style_index ";
2076: $arrow_style_index++;
2077: }
2078:
2079: my $style_command = "set style line $linestyle_index $pointtype $pointsize linetype $lt linewidth $line_width lc rgb '$color'\n";
2080: $gnuplot_input .= $style_command;
2081:
2082: # The condition below is because gnuplot lumps the linestyle in with the
2083: # arrowstyle _sigh_.
2084:
2085: if ($curve->{'linestyle'} ne 'vector') {
2086: $plot_command.= " ls $linestyle_index";
2087: }
2088:
2089: $plots .= $plot_type . ' ' . $plot_command;
2090: $linestyle_index++; # Each curve get a unique linestyle.
2091: }
2092: $gnuplot_input .= 'plot '.$plots;
2093: # Write the output to a file.
2094:
2095: # &Apache::lonnet::logthis($gnuplot_input); # uncomment to log the gnuplot input.
2096: open (my $fh, "> $tmpdir$filename.data");
2097: binmode($fh, ':utf8');
2098: print $fh $gnuplot_input;
2099: close($fh);
2100: # That's all folks.
2101: return ;
2102: }
2103:
2104: #---------------------------------------------- check_inputs
2105: sub check_inputs {
2106: ## Note: no inputs, no outputs - this acts only on global variables.
2107: ## Make sure we have all the input we need:
2108: if (! %Apache::lonplot::plot) { &set_defaults(\%Apache::lonplot::plot,\%gnuplot_defaults); }
2109: if (! %key ) {} # No key for this plot, thats okay
2110: # if (! %axis) { &set_defaults(\%axis,\%axis_defaults); }
2111: if (! defined($title )) {} # No title for this plot, thats okay
2112: if (! defined($xlabel)) {} # No xlabel for this plot, thats okay
2113: if (! defined($ylabel)) {} # No ylabel for this plot, thats okay
2114: if ($#labels < 0) { } # No labels for this plot, thats okay
2115: if ($#curves < 0) {
2116: &Apache::lonxml::warning("No curves specified for plot!!!!");
2117: return '';
2118: }
2119: my $curve;
2120: foreach $curve (@curves) {
2121: if (!defined($curve->{'function'})&&!defined($curve->{'data'})){
2122: &Apache::lonxml::warning("One of the curves specified did not contain any curve data or curve function declarations\n");
2123: return '';
2124: }
2125: }
2126: }
2127:
2128: #------------------------------------------------ make_edit
2129: sub edit_attributes {
2130: my ($target,$token,$defaults,$keys) = @_;
2131: my ($result,@keys);
2132: if ($keys && ref($keys) eq 'ARRAY') {
2133: @keys = @$keys;
2134: } else {
2135: @keys = sort(keys(%$defaults));
2136: }
2137: foreach my $attr (@keys) {
2138: # append a ' ' to the description if it doesn't have one already.
2139: my $description = $defaults->{$attr}->{'description'};
2140: $description .= ' ' if ($description !~ / $/);
2141: if ($defaults->{$attr}->{'edit_type'} eq 'entry') {
2142: $result .= &Apache::edit::text_arg
2143: ($description,$attr,$token,
2144: $defaults->{$attr}->{'size'},
2145: $defaults->{$attr}->{'class'});
2146: } elsif ($defaults->{$attr}->{'edit_type'} eq 'choice') {
2147: $result .= &Apache::edit::select_or_text_arg
2148: ($description,$attr,$defaults->{$attr}->{'choices'},$token);
2149: } elsif ($defaults->{$attr}->{'edit_type'} eq 'onoff') {
2150: $result .= &Apache::edit::select_or_text_arg
2151: ($description,$attr,['on','off'],$token);
2152: }
2153: $result .= '<br />';
2154: }
2155: return $result;
2156: }
2157:
2158:
2159: ###################################################################
2160: ## ##
2161: ## Insertion functions for editing plots ##
2162: ## ##
2163: ###################################################################
2164:
2165: sub insert_gnuplot {
2166: my $result = '';
2167: # plot attributes
2168: $result .= "\n<gnuplot ";
2169: foreach my $attr (keys(%gnuplot_defaults)) {
2170: $result .= "\n $attr=\"$gnuplot_defaults{$attr}->{'default'}\"";
2171: }
2172: $result .= ">";
2173: # Add the components (most are commented out for simplicity)
2174: # $result .= &insert_key();
2175: # $result .= &insert_axis();
2176: # $result .= &insert_title();
2177: # $result .= &insert_xlabel();
2178: # $result .= &insert_ylabel();
2179: $result .= &insert_curve();
2180: # close up the <gnuplot>
2181: $result .= "\n</gnuplot>";
2182: return $result;
2183: }
2184:
2185: sub insert_tics {
2186: my $result;
2187: $result .= &insert_xtics() . &insert_ytics;
2188: return $result;
2189: }
2190:
2191: sub insert_xtics {
2192: my $result;
2193: $result .= "\n <xtics ";
2194: foreach my $attr (keys(%tic_defaults)) {
2195: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
2196: }
2197: $result .= "/>";
2198: return $result;
2199: }
2200:
2201: sub insert_ytics {
2202: my $result;
2203: $result .= "\n <ytics ";
2204: foreach my $attr (keys(%tic_defaults)) {
2205: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
2206: }
2207: $result .= "/>";
2208: return $result;
2209: }
2210:
2211: sub insert_key {
2212: my $result;
2213: $result .= "\n <key ";
2214: foreach my $attr (keys(%key_defaults)) {
2215: $result .= "\n $attr=\"$key_defaults{$attr}->{'default'}\"";
2216: }
2217: $result .= " />";
2218: return $result;
2219: }
2220:
2221: sub insert_axis{
2222: my $result;
2223: $result .= "\n <axis ";
2224: foreach my $attr (keys(%axis_defaults)) {
2225: $result .= "\n $attr=\"$axis_defaults{$attr}->{'default'}\"";
2226: }
2227: $result .= " />";
2228: return $result;
2229: }
2230:
2231: sub insert_title { return "\n <title></title>"; }
2232: sub insert_xlabel { return "\n <xlabel></xlabel>"; }
2233: sub insert_ylabel { return "\n <ylabel></ylabel>"; }
2234:
2235: sub insert_label {
2236: my $result;
2237: $result .= "\n <label ";
2238: foreach my $attr (keys(%label_defaults)) {
2239: $result .= "\n $attr=\"".
2240: $label_defaults{$attr}->{'default'}."\"";
2241: }
2242: $result .= "></label>";
2243: return $result;
2244: }
2245:
2246: sub insert_curve {
2247: my $result;
2248: $result .= "\n <curve ";
2249: foreach my $attr (keys(%curve_defaults)) {
2250: $result .= "\n $attr=\"".
2251: $curve_defaults{$attr}->{'default'}."\"";
2252: }
2253: $result .= " >";
2254: $result .= &insert_data().&insert_data()."\n </curve>";
2255: }
2256:
2257: sub insert_function {
2258: my $result;
2259: $result .= "\n <function></function>";
2260: return $result;
2261: }
2262:
2263: sub insert_data {
2264: my $result;
2265: $result .= "\n <data></data>";
2266: return $result;
2267: }
2268:
2269: ##----------------------------------------------------------------------
2270: 1;
2271: __END__
2272:
2273:
2274: =head1 NAME
2275:
2276: Apache::lonplot.pm
2277:
2278: =head1 SYNOPSIS
2279:
2280: XML-based plotter of graphs
2281:
2282: This is part of the LearningOnline Network with CAPA project
2283: described at http://www.lon-capa.org.
2284:
2285:
2286: =head1 SUBROUTINES (parsing and edit rendering)
2287:
2288: =over
2289:
2290: =item start_gnuplot()
2291:
2292: =item end_gnuplot()
2293:
2294: =item start_xtics()
2295:
2296: =item end_xtics()
2297:
2298: =item start_ytics()
2299:
2300: =item end_ytics()
2301:
2302: =item get_font()
2303:
2304: =item start_key()
2305:
2306: =item end_key()
2307:
2308: =item parse_label()
2309:
2310: =item replace_entities()
2311:
2312: =item start_title()
2313:
2314: =item end_title()
2315:
2316: =item start_xlabel()
2317:
2318: =item end_xlabel()
2319:
2320: =item start_ylabel()
2321:
2322: =item end_label()
2323:
2324: =item start_curve()
2325:
2326: =item end_curve()
2327:
2328: =item start_function()
2329:
2330: =item end_function()
2331:
2332: =item start_data()
2333:
2334: =item end_data()
2335:
2336: =item start_axis()
2337:
2338: =item end_axis
2339:
2340: =back
2341:
2342: =head1 SUBROUTINES (Utility)
2343:
2344: =over
2345:
2346: =item set_defaults()
2347:
2348: =item get_attributes()
2349:
2350: =item write_gnuplot_file()
2351:
2352: =item check_inputs()
2353:
2354: =item edit_attributes()
2355:
2356: =back
2357:
2358: =head1 SUBROUTINES (Insertion functions for editing plots)
2359:
2360: =over
2361:
2362: =item insert_gnuplot()
2363:
2364: =item insert_tics()
2365:
2366: =item insert_xtics()
2367:
2368: =item insert_key()
2369:
2370: =item insert_axis()
2371:
2372: =item insert_title()
2373:
2374: =item insert_xlabel()
2375:
2376: =item insert_ylabel()
2377:
2378: =item insert_label()
2379:
2380: =item insert_curve()
2381:
2382: =item insert_function()
2383:
2384: =item insert_data()
2385:
2386: =back
2387:
2388: =cut
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