1: # The LearningOnline Network with CAPA
2: # Dynamic plot
3: #
4: # $Id: lonplot.pm,v 1.161 2012/07/17 09:54:48 foxr 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 $color_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^x[\da-fA-F]{6}$/};
136: my $onoff_test = sub {$_[0]=~/^(on|off)$/};
137: my $key_pos_test = sub {$_[0]=~/^(top|bottom|right|left|outside|below| )+$/};
138: my $sml_test = sub {$_[0]=~/^(\d+|small|medium|large)$/};
139: my $linestyle_test = sub {exists($linestyles{$_[0]})};
140: my $words_test = sub {$_[0]=~s/\s+/ /g;$_[0]=~/^([\w~!\@\#\$\%^&\*\(\)-=_\+\[\]\{\}:\;\'<>,\.\/\?\\]+ ?)+$/};
141:
142: my $arrowhead_test = sub{$_[0]=~/^(nohead|head|heads| )+$/};
143: my $arrowstyle_test= sub{$_[0]=~/^(filled|empty|nofilled)+$/};
144: my $degree_test = sub{&$pos_real_test($_[0]) && ($_[0] <= 360.0)};
145:
146: ###################################################################
147: ## ##
148: ## Attribute metadata ##
149: ## ##
150: ###################################################################
151: my @gnuplot_edit_order =
152: qw/alttag bgcolor fgcolor height width texwidth fontface font texfont
153: transparent grid samples
154: border align plotcolor plottype gridtype lmargin rmargin
155: tmargin bmargin major_ticscale minor_ticscale boxwidth gridlayer fillstyle
156: pattern solid/;
157:
158: my $margin_choices = ['default',0..20];
159:
160: my %gnuplot_defaults =
161: (
162: alttag => {
163: default => 'dynamically generated plot',
164: test => $words_test,
165: description => 'Brief description of the plot',
166: edit_type => 'entry',
167: size => '40'
168: },
169: height => {
170: default => 300,
171: test => $int_test,
172: description => 'Height of image (pixels)',
173: edit_type => 'entry',
174: size => '10'
175: },
176: width => {
177: default => 400,
178: test => $int_test,
179: description => 'Width of image (pixels)',
180: edit_type => 'entry',
181: size => '10'
182: },
183: bgcolor => {
184: default => 'xffffff',
185: test => $color_test,
186: description => 'Background color of image (xffffff)',
187: edit_type => 'entry',
188: size => '10',
189: class => 'colorchooser'
190: },
191: fgcolor => {
192: default => 'x000000',
193: test => $color_test,
194: description => 'Foreground color of image (x000000)',
195: edit_type => 'entry',
196: size => '10',
197: class => 'colorchooser'
198: },
199: transparent => {
200: default => 'off',
201: test => $onoff_test,
202: description => 'Transparent image',
203: edit_type => 'onoff'
204: },
205: grid => {
206: default => 'on',
207: test => $onoff_test,
208: description => 'Display grid',
209: edit_type => 'onoff'
210: },
211: gridlayer => {
212: default => 'off',
213: test => $onoff_test,
214: description => 'Display grid front layer over filled boxes or filled curves',
215: edit_type => 'onoff'
216: },
217: box_border => {
218: default => 'noborder',
219: test => sub {$_[0]=~/^(noborder|border)$/},
220: description => 'Draw border for boxes',
221: edit_type => 'choice',
222: choices => ['border','noborder']
223: },
224: border => {
225: default => 'on',
226: test => $onoff_test,
227: description => 'Draw border around plot',
228: edit_type => 'onoff'
229: },
230: font => {
231: default => '9',
232: test => $sml_test,
233: description => 'Font size to use in web output (pts)',
234: edit_type => 'choice',
235: choices => [['5','5 (small)'],'6','7','8',['9','9 (medium)'],'10',['11','11 (large)'],'12','15']
236: },
237: fontface => {
238: default => 'sans-serif',
239: test => sub {$_[0]=~/^(sans-serif|serif|classic)$/},
240: description => 'Type of font to use',
241: edit_type => 'choice',
242: choices => ['sans-serif','serif', 'classic']
243: },
244: samples => {
245: default => '100',
246: test => $int_test,
247: description => 'Number of samples for non-data plots',
248: edit_type => 'choice',
249: choices => ['100','200','500','1000','2000','5000']
250: },
251: align => {
252: default => 'middle',
253: test => sub {$_[0]=~/^(left|right|middle|center)$/},
254: description => 'Alignment for image in HTML',
255: edit_type => 'choice',
256: choices => ['left','right','middle']
257: },
258: texwidth => {
259: default => '93',
260: test => $int_test,
261: description => 'Width of plot when printed (mm)',
262: edit_type => 'entry',
263: size => '5'
264: },
265: texfont => {
266: default => '22',
267: test => $int_test,
268: description => 'Font size to use in TeX output (pts):',
269: edit_type => 'choice',
270: choices => [qw/8 10 12 14 16 18 20 22 24 26 28 30 32 34 36/],
271: },
272: plotcolor => {
273: default => 'monochrome',
274: test => sub {$_[0]=~/^(monochrome|color|colour)$/},
275: description => 'Color setting for printing:',
276: edit_type => 'choice',
277: choices => [qw/monochrome color colour/],
278: },
279: pattern => {
280: default => '',
281: test => $int_test,
282: description => 'Pattern value for boxes:',
283: edit_type => 'choice',
284: choices => [0,1,2,3,4,5,6]
285: },
286: solid => {
287: default => 0,
288: test => $real_test,
289: description => 'The density of fill style for boxes',
290: edit_type => 'entry',
291: size => '5'
292: },
293: fillstyle => {
294: default => 'empty',
295: test => sub {$_[0]=~/^(empty|solid|pattern)$/},
296: description => 'Filled style for boxes:',
297: edit_type => 'choice',
298: choices => ['empty','solid','pattern']
299: },
300: plottype => {
301: default => 'Cartesian',
302: test => sub {$_[0]=~/^(Polar|Cartesian)$/},
303: description => 'Plot type:',
304: edit_type => 'choice',
305: choices => ['Cartesian','Polar']
306: },
307: gridtype => {
308: default => 'Cartesian',
309: test => sub {$_[0]=~/^(Polar|Cartesian|Linear-Log|Log-Linear|Log-Log)$/},
310: description => 'Grid type:',
311: edit_type => 'choice',
312: choices => ['Cartesian','Polar','Linear-Log','Log-Linear','Log-Log']
313: },
314: lmargin => {
315: default => 'default',
316: test => sub {$_[0]=~/^(default|\d+)$/},
317: description => 'Left margin width (pts):',
318: edit_type => 'choice',
319: choices => $margin_choices,
320: },
321: rmargin => {
322: default => 'default',
323: test => sub {$_[0]=~/^(default|\d+)$/},
324: description => 'Right margin width (pts):',
325: edit_type => 'choice',
326: choices => $margin_choices,
327: },
328: tmargin => {
329: default => 'default',
330: test => sub {$_[0]=~/^(default|\d+)$/},
331: description => 'Top margin width (pts):',
332: edit_type => 'choice',
333: choices => $margin_choices,
334: },
335: bmargin => {
336: default => 'default',
337: test => sub {$_[0]=~/^(default|\d+)$/},
338: description => 'Bottom margin width (pts):',
339: edit_type => 'choice',
340: choices => $margin_choices,
341: },
342: boxwidth => {
343: default => '',
344: test => $real_test,
345: description => 'Width of boxes, default is auto',
346: edit_type => 'entry',
347: size => '5'
348: },
349: major_ticscale => {
350: default => '1',
351: test => $real_test,
352: description => 'Size of major tic marks (plot coordinates)',
353: edit_type => 'entry',
354: size => '5'
355: },
356: minor_ticscale => {
357: default => '0.5',
358: test => $real_test,
359: description => 'Size of minor tic mark (plot coordinates)',
360: edit_type => 'entry',
361: size => '5'
362: },
363: );
364:
365: my %key_defaults =
366: (
367: title => {
368: default => '',
369: test => $words_test,
370: description => 'Title of key',
371: edit_type => 'entry',
372: size => '40'
373: },
374: box => {
375: default => 'off',
376: test => $onoff_test,
377: description => 'Draw a box around the key?',
378: edit_type => 'onoff'
379: },
380: pos => {
381: default => 'top right',
382: test => $key_pos_test,
383: description => 'Position of the key on the plot',
384: edit_type => 'choice',
385: choices => ['top left','top right','bottom left','bottom right',
386: 'outside','below']
387: }
388: );
389:
390: my %label_defaults =
391: (
392: xpos => {
393: default => 0,
394: test => $real_test,
395: description => 'X position of label (graph coordinates)',
396: edit_type => 'entry',
397: size => '10'
398: },
399: ypos => {
400: default => 0,
401: test => $real_test,
402: description => 'Y position of label (graph coordinates)',
403: edit_type => 'entry',
404: size => '10'
405: },
406: justify => {
407: default => 'left',
408: test => sub {$_[0]=~/^(left|right|center)$/},
409: description => 'justification of the label text on the plot',
410: edit_type => 'choice',
411: choices => ['left','right','center']
412: },
413: rotate => {
414: default => 0,
415: test => $real_test,
416: description => 'Rotation of label (degrees)',
417: edit_type => 'entry',
418: size => '10',
419: }
420: );
421:
422: my @tic_edit_order = ('location','mirror','start','increment','end',
423: 'minorfreq');
424: my %tic_defaults =
425: (
426: location => {
427: default => 'border',
428: test => sub {$_[0]=~/^(border|axis)$/},
429: description => 'Location of major tic marks',
430: edit_type => 'choice',
431: choices => ['border','axis']
432: },
433: mirror => {
434: default => 'on',
435: test => $onoff_test,
436: description => 'Mirror tics on opposite axis?',
437: edit_type => 'onoff'
438: },
439: start => {
440: default => '-10.0',
441: test => $real_test,
442: description => 'Start major tics at',
443: edit_type => 'entry',
444: size => '10'
445: },
446: increment => {
447: default => '1.0',
448: test => $real_test,
449: description => 'Place a major tic every',
450: edit_type => 'entry',
451: size => '10'
452: },
453: end => {
454: default => ' 10.0',
455: test => $real_test,
456: description => 'Stop major tics at ',
457: edit_type => 'entry',
458: size => '10'
459: },
460: minorfreq => {
461: default => '0',
462: test => $int_test,
463: description => 'Number of minor tics per major tic mark',
464: edit_type => 'entry',
465: size => '10'
466: },
467: );
468:
469: my @axis_edit_order = ('color','xmin','xmax','ymin','ymax','xformat', 'yformat', 'xzero', 'yzero');
470: my %axis_defaults =
471: (
472: color => {
473: default => 'x000000',
474: test => $color_test,
475: description => 'Color of grid lines (x000000)',
476: edit_type => 'entry',
477: size => '10',
478: class => 'colorchooser'
479: },
480: xmin => {
481: default => '-10.0',
482: test => $real_test,
483: description => 'Minimum x-value shown in plot',
484: edit_type => 'entry',
485: size => '10'
486: },
487: xmax => {
488: default => ' 10.0',
489: test => $real_test,
490: description => 'Maximum x-value shown in plot',
491: edit_type => 'entry',
492: size => '10'
493: },
494: ymin => {
495: default => '-10.0',
496: test => $real_test,
497: description => 'Minimum y-value shown in plot',
498: edit_type => 'entry',
499: size => '10'
500: },
501: ymax => {
502: default => ' 10.0',
503: test => $real_test,
504: description => 'Maximum y-value shown in plot',
505: edit_type => 'entry',
506: size => '10'
507: },
508: xformat => {
509: default => 'on',
510: test => sub {$_[0]=~/^(on|off|\d+(f|F|e|E))$/},
511: description => 'X-axis number formatting',
512: edit_type => 'choice',
513: choices => ['on', 'off', '2e', '2f'],
514: },
515: yformat => {
516: default => 'on',
517: test => sub {$_[0]=~/^(on|off|\d+(f|F|e|E))$/},
518: description => 'Y-axis number formatting',
519: edit_type => 'choice',
520: choices => ['on', 'off', '2e', '2f'],
521: },
522:
523: xzero => {
524: default => 'off',
525: test => sub {$_[0]=~/^(off|line|thick-line|dotted)$/},
526: description => 'Show x-zero (y=0) axis',
527: edit_type => 'choice',
528: choices => ['off', 'line', 'thick-line', 'dotted'],
529: },
530:
531: yzero => {
532: default => 'off',
533: test => sub {$_[0]=~/^(off|line|thick-line|dotted)$/},
534: description => 'Show y-zero (x=0) axis',
535: edit_type => 'choice',
536: choices => ['off', 'line', 'thick-line', 'dotted'],
537: },
538: );
539:
540: my @curve_edit_order = ('color','name','linestyle','linewidth','linetype',
541: 'pointtype','pointsize','limit', 'arrowhead', 'arrowstyle',
542: 'arrowlength', 'arrowangle', 'arrowbackangle'
543: );
544:
545: my %curve_defaults =
546: (
547: color => {
548: default => 'x000000',
549: test => $color_test,
550: description => 'Color of curve (x000000)',
551: edit_type => 'entry',
552: size => '10',
553: class => 'colorchooser'
554: },
555: name => {
556: default => '',
557: test => $words_test,
558: description => 'Name of curve to appear in key',
559: edit_type => 'entry',
560: size => '20'
561: },
562: linestyle => {
563: default => 'lines',
564: test => $linestyle_test,
565: description => 'Plot with:',
566: edit_type => 'choice',
567: choices => [keys(%linestyles)]
568: },
569: linewidth => {
570: default => 1,
571: test => $int_test,
572: description => 'Line width (may not apply to all plot styles)',
573: edit_type => 'choice',
574: choices => [1,2,3,4,5,6,7,8,9,10]
575: },
576: linetype => {
577: default => 'solid',
578: test => sub {$_[0]=~/^(solid|dashed)$/},
579: description => 'Line type (may not apply to all plot styles)',
580: edit_type => 'choice',
581: choices => ['solid', 'dashed']
582: },
583: pointsize => {
584: default => 1,
585: test => $pos_real_test,
586: description => 'Point size (may not apply to all plot styles)',
587: edit_type => 'entry',
588: size => '5'
589: },
590: pointtype => {
591: default => 1,
592: test => $int_test,
593: description => 'Point type (may not apply to all plot styles)',
594: edit_type => 'choice',
595: choices => [0,1,2,3,4,5,6]
596: },
597: limit => {
598: default => 'closed',
599: test => sub {$_[0]=~/^(above|below|closed|x1|x2|y1|y2)$/},
600: description => 'Point to fill -- for filledcurves',
601: edit_type => 'choice',
602: choices => ['above', 'below', 'closed','x1','x2','y1','y2']
603: },
604: arrowhead => {
605: default => 'head',
606: test => $arrowhead_test,
607: description => 'Vector arrow head type',
608: edit_type => 'choice',
609: choices => ['nohead', 'head', 'heads']
610: },
611: arrowstyle => {
612: default => 'filled',
613: test => $arrowstyle_test,
614: description => 'Vector arrow head style',
615: edit_type => 'choice',
616: choices => ['filled', 'empty', 'nofilled']
617: },
618: arrowlength => {
619: default => 0.02,
620: test => $pos_real_test,
621: description => "Length of vector arrow (only applies to vector plots)",
622: edit_type => 'entry',
623: size => '5'
624: },
625: arrowangle => {
626: default => 10.0,
627: test => $degree_test,
628: description => 'Angle of arrow branches to arrow body (only applies to vector plots)',
629: edit_type => 'entry',
630: size => '5'
631: },
632:
633: arrowbackangle => {
634: default => 90.0,
635: test => $degree_test,
636: descripton => 'Angle of arrow back lines to branches.',
637: edit_type => 'entry',
638: size => '5'
639: }
640:
641: );
642:
643: ###################################################################
644: ## ##
645: ## parsing and edit rendering ##
646: ## ##
647: ###################################################################
648:
649: undef %Apache::lonplot::plot;
650: my (%key,%axis,$title,$xlabel,$ylabel,@labels,@curves,%xtics,%ytics);
651:
652: sub start_gnuplot {
653: undef(%Apache::lonplot::plot); undef(%key); undef(%axis);
654: undef($title); undef($xlabel); undef($ylabel);
655: undef(@labels); undef(@curves);
656: undef(%xtics); undef(%ytics);
657: #
658: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
659: my $result='';
660: &Apache::lonxml::register('Apache::lonplot',
661: ('title','xlabel','ylabel','key','axis','label','curve',
662: 'xtics','ytics'));
663: push (@Apache::lonxml::namespace,'lonplot');
664: if ($target eq 'web' || $target eq 'tex') {
665: &get_attributes(\%Apache::lonplot::plot,\%gnuplot_defaults,$parstack,$safeeval,
666: $tagstack->[-1]);
667: } elsif ($target eq 'edit') {
668: $result .= &Apache::edit::tag_start($target,$token,'GnuPlot');
669: $result .= &edit_attributes($target,$token,\%gnuplot_defaults,
670: \@gnuplot_edit_order)
671: .&Apache::edit::end_row()
672: .&Apache::edit::start_spanning_row();
673: } elsif ($target eq 'modified') {
674: my $constructtag=&Apache::edit::get_new_args
675: ($token,$parstack,$safeeval,keys(%gnuplot_defaults));
676:
677: if ($constructtag) {
678: #
679: # The color chooser does not prepent x to the color values
680: # Do that here:
681: #
682: foreach my $attribute ('bgcolor', 'fgcolor') {
683: my $value = $token->[2]{$attribute};
684: if (defined $value && !($value =~ /^x/)) {
685: $token->[2]{$attribute} = 'x' . $value;
686: }
687: }
688: $result = &Apache::edit::rebuild_tag($token);
689: }
690: }
691: return $result;
692: }
693:
694: sub end_gnuplot {
695: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
696: pop @Apache::lonxml::namespace;
697: &Apache::lonxml::deregister('Apache::lonplot',
698: ('title','xlabel','ylabel','key','axis','label','curve'));
699: my $result = '';
700: my $randnumber;
701: my $tmpdir =LONCAPA::tempdir(); # Where temporary files live:
702:
703: # need to call rand everytime start_script would evaluate, as the
704: # safe space rand number generator and the global rand generator
705: # are not separate
706: if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
707: $target eq 'answer') {
708: $randnumber=int(rand(1000));
709: }
710: if ($target eq 'web' || $target eq 'tex') {
711: &check_inputs(); # Make sure we have all the data we need
712: ##
713: ## Determine filename
714: my $filename = $env{'user.name'}.'_'.$env{'user.domain'}.
715: '_'.time.'_'.$$.$randnumber.'_plot';
716: ## Write the plot description to the file
717: &write_gnuplot_file($tmpdir,$filename,$target);
718: $filename = &escape($filename);
719: ## return image tag for the plot
720: if ($target eq 'web') {
721: $result .= <<"ENDIMAGE";
722: <img src = "/cgi-bin/plot.$weboutputformat?file=$filename.data"
723: width = "$Apache::lonplot::plot{'width'}"
724: height = "$Apache::lonplot::plot{'height'}"
725: align = "$Apache::lonplot::plot{'align'}"
726: alt = "$Apache::lonplot::plot{'alttag'}" />
727: ENDIMAGE
728: } elsif ($target eq 'tex') {
729: &Apache::lonxml::debug(" gnuplot wid = $Apache::lonplot::plot{'width'}");
730: &Apache::lonxml::debug(" gnuplot ht = $Apache::lonplot::plot{'height'}");
731: #might be inside the safe space, register the URL for later
732: &Apache::lonxml::register_ssi("/cgi-bin/plot.gif?file=$filename.data&output=eps");
733: $result = "%DYNAMICIMAGE:$Apache::lonplot::plot{'width'}:$Apache::lonplot::plot{'height'}:$Apache::lonplot::plot{'texwidth'}\n";
734: $result .= '\graphicspath{{'.$tmpdir.'}}'."\n";
735: $result .= '\includegraphics[width='.$Apache::lonplot::plot{'texwidth'}.' mm]{'.&unescape($filename).'.eps}';
736: }
737: } elsif ($target eq 'edit') {
738: $result.=&Apache::edit::tag_end($target,$token);
739: }
740: return $result;
741: }
742:
743:
744: ##--------------------------------------------------------------- xtics
745: sub start_xtics {
746: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
747: my $result='';
748: if ($target eq 'web' || $target eq 'tex') {
749: &get_attributes(\%xtics,\%tic_defaults,$parstack,$safeeval,
750: $tagstack->[-1]);
751: } elsif ($target eq 'edit') {
752: $result .= &Apache::edit::tag_start($target,$token,'xtics');
753: $result .= &edit_attributes($target,$token,\%tic_defaults,
754: \@tic_edit_order);
755: } elsif ($target eq 'modified') {
756: my $constructtag=&Apache::edit::get_new_args
757: ($token,$parstack,$safeeval,keys(%tic_defaults));
758: if ($constructtag) {
759: $result = &Apache::edit::rebuild_tag($token);
760: }
761: }
762: return $result;
763: }
764:
765: sub end_xtics {
766: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
767: my $result = '';
768: if ($target eq 'web' || $target eq 'tex') {
769: } elsif ($target eq 'edit') {
770: $result.=&Apache::edit::tag_end($target,$token);
771: }
772: return $result;
773: }
774:
775: ##--------------------------------------------------------------- ytics
776: sub start_ytics {
777: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
778: my $result='';
779: if ($target eq 'web' || $target eq 'tex') {
780: &get_attributes(\%ytics,\%tic_defaults,$parstack,$safeeval,
781: $tagstack->[-1]);
782: } elsif ($target eq 'edit') {
783: $result .= &Apache::edit::tag_start($target,$token,'ytics');
784: $result .= &edit_attributes($target,$token,\%tic_defaults,
785: \@tic_edit_order);
786: } elsif ($target eq 'modified') {
787: my $constructtag=&Apache::edit::get_new_args
788: ($token,$parstack,$safeeval,keys(%tic_defaults));
789: if ($constructtag) {
790: $result = &Apache::edit::rebuild_tag($token);
791: }
792: }
793: return $result;
794: }
795:
796: sub end_ytics {
797: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
798: my $result = '';
799: if ($target eq 'web' || $target eq 'tex') {
800: } elsif ($target eq 'edit') {
801: $result.=&Apache::edit::tag_end($target,$token);
802: }
803: return $result;
804: }
805:
806: ##-----------------------------------------------------------------font
807: my %font_properties =
808: (
809: 'classic' => {
810: face => 'classic',
811: file => 'DejaVuSansMono-Bold',
812: printname => 'Helvetica',
813: tex_no_file => 1,
814: },
815: 'sans-serif' => {
816: face => 'sans-serif',
817: file => 'DejaVuSans',
818: printname => 'DejaVuSans',
819: },
820: 'serif' => {
821: face => 'serif',
822: file => 'DejaVuSerif',
823: printname => 'DejaVuSerif',
824: },
825: );
826:
827: sub get_font {
828: my ($target) = @_;
829: my ($size, $selected_font);
830:
831: if ( $Apache::lonplot::plot{'font'} =~ /^(small|medium|large)/) {
832: $selected_font = $font_properties{'classic'};
833: if ( $Apache::lonplot::plot{'font'} eq 'small') {
834: $size = '5';
835: } elsif ( $Apache::lonplot::plot{'font'} eq 'medium') {
836: $size = '9';
837: } elsif ( $Apache::lonplot::plot{'font'} eq 'large') {
838: $size = '11';
839: } else {
840: $size = '9';
841: }
842: } else {
843: $size = $Apache::lonplot::plot{'font'};
844: $selected_font = $font_properties{$Apache::lonplot::plot{'fontface'}};
845: }
846: if ($target eq 'tex' && defined($Apache::lonplot::plot{'texfont'})) {
847: # $selected_font = $font_properties{'classic'};
848: $size = $Apache::lonplot::plot{'texfont'};
849: }
850: return ($size, $selected_font);
851: }
852:
853: ##----------------------------------------------------------------- key
854: sub start_key {
855: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
856: my $result='';
857: if ($target eq 'web' || $target eq 'tex') {
858: &get_attributes(\%key,\%key_defaults,$parstack,$safeeval,
859: $tagstack->[-1]);
860: } elsif ($target eq 'edit') {
861: $result .= &Apache::edit::tag_start($target,$token,'Plot Key');
862: $result .= &edit_attributes($target,$token,\%key_defaults);
863: } elsif ($target eq 'modified') {
864: my $constructtag=&Apache::edit::get_new_args
865: ($token,$parstack,$safeeval,keys(%key_defaults));
866: if ($constructtag) {
867: $result = &Apache::edit::rebuild_tag($token);
868: }
869: }
870: return $result;
871: }
872:
873: sub end_key {
874: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
875: my $result = '';
876: if ($target eq 'web' || $target eq 'tex') {
877: } elsif ($target eq 'edit') {
878: $result.=&Apache::edit::tag_end($target,$token);
879: }
880: return $result;
881: }
882:
883: sub parse_label {
884: my ($target,$text) = @_;
885: my $parser=HTML::LCParser->new(\$text);
886: my $result;
887: while (my $token=$parser->get_token) {
888: if ($token->[0] eq 'S') {
889: if ($token->[1] eq 'sub') {
890: $result .= '_{';
891: } elsif ($token->[1] eq 'sup') {
892: $result .= '^{';
893: } else {
894: $result .= $token->[4];
895: }
896: } elsif ($token->[0] eq 'E') {
897: if ($token->[1] eq 'sub'
898: || $token->[1] eq 'sup') {
899: $result .= '}';
900: } else {
901: $result .= $token->[2];
902: }
903: } elsif ($token->[0] eq 'T') {
904: $result .= &replace_entities($target,$token->[1]);
905: }
906: }
907: return $result;
908: }
909:
910: #
911: # Note that there are severe restrictions on font selection in the
912: # ps driver now. later in life Gnuplot is supposed to support
913: # utf-8 fonts in the posts script driver. When this happens,
914: # the tex entries with comments that include the word <FIX>
915: # should be changed to print the correct glyphs rather than some
916: # approximation or fallback of what is intended.
917:
918: my %lookup =
919: ( # Greek alphabet:
920:
921: '(Alpha|#913)' => {'tex' => '{/Symbol A}', 'web' => "\x{391}"},
922: '(Beta|#914)' => {'tex' => '{/Symbol B}', 'web' => "\x{392}"},
923: '(Chi|#935)' => {'tex' => '{/Symbol C}', 'web' => "\x{3A7}"},
924: '(Delta|#916)' => {'tex' => '{/Symbol D}', 'web' => "\x{394}"},
925: '(Epsilon|#917)' => {'tex' => '{/Symbol E}', 'web' => "\x{395}"},
926: '(Phi|#934)' => {'tex' => '{/Symbol F}', 'web' => "\x{3A6}"},
927: '(Gamma|#915)' => {'tex' => '{/Symbol G}', 'web' => "\x{393}"},
928: '(Eta|#919)' => {'tex' => '{/Symbol H}', 'web' => "\x{397}"},
929: '(Iota|#921)' => {'tex' => '{/Symbol I}', 'web' => "\x{399}"},
930: '(Kappa|#922)' => {'tex' => '{/Symbol K}', 'web' => "\x{39A}"},
931: '(Lambda|#923)' => {'tex' => '{/Symbol L}', 'web' => "\x{39B}"},
932: '(Mu|#924)' => {'tex' => '{/Symbol M}', 'web' => "\x{39C}"},
933: '(Nu|#925)' => {'tex' => '{/Symbol N}', 'web' => "\x{39D}"},
934: '(Omicron|#927)' => {'tex' => '{/Symbol O}', 'web' => "\x{39F}"},
935: '(Pi|#928)' => {'tex' => '{/Symbol P}', 'web' => "\x{3A0}"},
936: '(Theta|#920)' => {'tex' => '{/Symbol Q}', 'web' => "\x{398}"},
937: '(Rho|#929)' => {'tex' => '{/Symbol R}', 'web' => "\x{3A1}"},
938: '(Sigma|#931)' => {'tex' => '{/Symbol S}', 'web' => "\x{3A3}"},
939: '(Tau|#932)' => {'tex' => '{/Symbol T}', 'web' => "\x{3A4}"},
940: '(Upsilon|#933)' => {'tex' => '{/Symbol U}', 'web' => "\x{3A5}"},
941: '(Omega|#937)' => {'tex' => '{/Symbol W}', 'web' => "\x{3A9}"},
942: '(Xi|#926)' => {'tex' => '{/Symbol X}', 'web' => "\x{39E}"},
943: '(Psi|#936)' => {'tex' => '{/Symbol Y}', 'web' => "\x{3A8}"},
944: '(Zeta|#918)' => {'tex' => '{/Symbol Z}', 'web' => "\x{396}"},
945: '(alpha|#945)' => {'tex' => '{/Symbol a}', 'web' => "\x{3B1}"},
946: '(beta|#946)' => {'tex' => '{/Symbol b}', 'web' => "\x{3B2}"},
947: '(chi|#967)' => {'tex' => '{/Symbol c}', 'web' => "\x{3C7}"},
948: '(delta|#948)' => {'tex' => '{/Symbol d}', 'web' => "\x{3B4}"},
949: '(epsilon|#949)' => {'tex' => '{/Symbol e}', 'web' => "\x{3B5}"},
950: '(phi|#966)' => {'tex' => '{/Symbol f}', 'web' => "\x{3C6}"},
951: '(gamma|#947)' => {'tex' => '{/Symbol g}', 'web' => "\x{3B3}"},
952: '(eta|#951)' => {'tex' => '{/Symbol h}', 'web' => "\x{3B7}"},
953: '(iota|#953)' => {'tex' => '{/Symbol i}', 'web' => "\x{3B9}"},
954: '(kappa|#954)' => {'tex' => '{/Symbol k}', 'web' => "\x{3BA}"},
955: '(lambda|#955)' => {'tex' => '{/Symbol k}', 'web' => "\x{3BB}"},
956: '(mu|#956)' => {'tex' => '{/Symbol m}', 'web' => "\x{3BC}"},
957: '(nu|#957)' => {'tex' => '{/Symbol n}', 'web' => "\x{3BD}"},
958: '(omicron|#959)' => {'tex' => '{/Symbol o}', 'web' => "\x{3BF}"},
959: '(pi|#960)' => {'tex' => '{/Symbol p}', 'web' => "\x{3C0}"},
960: '(theta|#952)' => {'tex' => '{/Symbol q}', 'web' => "\x{3B8}"},
961: '(rho|#961)' => {'tex' => '{/Symbol r}', 'web' => "\x{3C1}"},
962: '(sigma|#963)' => {'tex' => '{/Symbol s}', 'web' => "\x{3C3}"},
963: '(tau|#964)' => {'tex' => '{/Symbol t}', 'web' => "\x{3C4}"},
964: '(upsilon|#965)' => {'tex' => '{/Symbol u}', 'web' => "\x{3C5}"},
965: '(omega|#969)' => {'tex' => '{/Symbol w}', 'web' => "\x{3C9}"},
966: '(xi|#958)' => {'tex' => '{/Symbol x}', 'web' => "\x{3BE}"},
967: '(psi|#968)' => {'tex' => '{/Symbol y}', 'web' => "\x{3C8}"},
968: '(zeta|#950)' => {'tex' => '{/Symbol z}', 'web' => "\x{3B6}"},
969: '(thetasym|#977)' => {'tex' => '{/Symbol \165}', 'web' => "\x{3d1}"},
970: '(upsih|#978)' => {'tex' => '{/Symbol \241}', 'web' => "\x{3d2}"},
971: '(piv|#982)' => {'tex' => '{/Symbol \166}', 'web' => "\x{3d6}"},
972:
973:
974: # Punctuation:
975:
976: '(quot|#034)' => {'tex' => '\42', 'web' => '\42'},
977: '(amp|#038)' => {'tex' => '\46', 'web' => '\46'},
978: '(lt|#060)' => {'tex' => '\74', 'web' => '\74'},
979: '(gt|#062)' => {'tex' => '\76', 'web' => '\76'},
980: '#131' => {'tex' => '{/Symbol \246}', 'web' => "\x{192}"},
981: '#132' => {'tex' => '{/Text \271}', 'web' => "\x{201e}"},
982: '#133' => {'tex' => '{/Symbol \274}', 'web'=> "\x{2026}"},
983: '#134' => {'tex' => '{/Text \262}', 'web' => "\x{2020}"},
984: '#135' => {'tex' => '{/Text \263}', 'web' => "\x{2021}"},
985: '#136' => {'tex' => '\\\\^', 'web' => '\\\\^'},
986: '#137' => {'tex' => '%o', 'web' => "\x{2030}"}, # Per Mille <FIX>
987: '#138' => {'tex' => 'S', 'web' => "\x{160}"}, # S-Caron <FIX>
988: '#139' => {'tex' => '<', 'web' => '<'},
989: '#140' => {'tex' => 'AE', 'web' => "\x{152}"}, # AE ligature <FIX>
990: '#145' => {'tex' => '\140', 'web' => "\x{2018}"},
991: '#146' => {'tex' => '\47', 'web' => "\x{2019}"},
992: '#147' => {'tex' => '\140\140', 'web' => "\x{201c}"}, # Left " <FIX>
993: '#148' => {'tex' => '\47\47', 'web' => '\\"'}, # Right " <FIX>
994: '#149' => {'tex' => '{/Symbol \267}', 'web' => "\x{2022}"},
995: '#150' => {'tex' => '{/Text \55}', 'web' => "\x{2013}"}, # en dash
996: '#151' => {'tex' => '{/Symbol \55}', 'web' => "\x{2014}"}, # em dash
997: '#152' => {'tex' => '\\\\~', 'web' => '\\\\~'},
998: '#153' => {'tex' => '{/Symbol \324}', 'web' => "\x{2122}"}, # trademark
999:
1000: # Accented letters, and other furreign language glyphs.
1001:
1002: '#154' => {'tex' => 's', 'web' => "\x{161}"}, # small s-caron no ps.
1003: '#155' => {'tex' => '>', 'web' => '\76'}, # >
1004: '#156' => {'tex' => '{/Text \366}', 'web' => "\x{153}"}, # oe ligature.<FIX>
1005: '#159', => {'tex' => 'Y', 'web' => "\x{178}"}, # Y-umlaut - can't print <FIX>
1006: '(nbsp|#160)' => {'tex' => ' ', 'web' => ' '}, # non breaking space.
1007: '(iexcl|#161)' => {'tex' => '{/Text \241}', 'web' => "\x{a1}"}, # inverted !
1008: '(cent|#162)' => {'tex' => '{/Text \242}', 'web' => "\x{a2}"}, # Cent currency.
1009: '(pound|#163)' => {'tex' => '{/Text \243}', 'web' => "\x{a3}"}, # GB Pound currency.
1010: '(curren|#164)' => {'tex' => '{/ZapfDingbats \161}','web' => "\x{a4}"}, # Generic currency symb. <FIX>
1011: '(yen|#165)' => {'tex' => '{/Text \245}', 'web' => "\x{a5}"}, # Yen currency.
1012: '(brvbar|#166)' => {'tex' => '{/Symbol \174}', 'web' => "\x{a6}"}, # Broken vert bar no print.
1013: '(sect|#167)' => {'tex' => '{\247}', 'web' => "\x{a7}"}, # Section symbol.
1014: '(uml|#168)' => {'tex' => '{\250}', 'web' => "\x{a8}"}, # 'naked' umlaut.
1015: '(copy|#169)' => {'tex' => '{/Symbol \343}', 'web' => "\x{a9}"}, # Copyright symbol.
1016: '(ordf|#170)' => {'tex' => '{/Text \343}', 'web' => "\x{aa}"}, # Feminine ordinal.
1017: '(laquo|#171)' => {'tex' => '{/Text \253}', 'web' => "\x{ab}"}, # << quotes.
1018: '(not|#172)' => {'tex' => '\254', 'web' => "\x{ac}"}, # Logical not.
1019: '(shy|#173)' => {'tex' => '\255', 'web' => "\x{ad}"}, # soft hyphen.
1020: '(reg|#174)' => {'tex' => '{/Symbol \342}', 'web' => "\x{ae}"}, # Registered tm.
1021: '(macr|#175)' => {'tex' => '^{\255}', 'web' => "\x{af}"}, # 'naked' macron (overbar).
1022: '(deg|#176)' => {'tex' => '{/Text \260}', 'web' => "\x{b0}"}, # Degree symbo..`
1023: '(plusmn|#177)' => {'tex' => '{/Symbol \261}', 'web' => "\x{b1}"}, # +/- symbol.
1024: '(sup2|#178)' => {'tex' => '^2', 'web' => "\x{b2}"}, # Superscript 2.
1025: '(sup3|#179)' => {'tex' => '^3', 'web' => "\x{b3}"}, # Superscript 3.
1026: '(acute|#180)' => {'tex' => '{/Text \222}', 'web' => "\x{b4}"}, # 'naked' acute accent.
1027: '(micro|#181)' => {'tex' => '{/Symbol \155}', 'web' => "\x{b5}"}, # Micro (small mu).
1028: '(para|#182)' => {'tex' => '{/Text \266}', 'web' => "\x{b6}"}, # Paragraph symbol.
1029: '(middot|#183)' => {'tex' => '\267', 'web' => "\x{b7}"}, # middle dot
1030: '(cedil|#184)' => {'tex' => '\233', 'web' => "\x{b8}"}, # 'naked' cedilla.
1031: '(sup1|#185)' => {'tex' => '^1', 'web' => "\x{b9}"}, # superscript 1.
1032: '(ordm|#186)' => {'tex' => '{\260}', 'web' => "\x{ba}"}, # masculine ordinal.
1033: '(raquo|#187)', => {'tex' => '\273', 'web' => "\x{bb}"}, # Right angle quotes.
1034: '(frac14|#188)' => {'tex' => '\274', 'web' => "\x{bc}"}, # 1/4.
1035: '(frac12|#189)' => {'tex' => '\275', 'web' => "\x{bd}"}, # 1/2.
1036: '(frac34|#190)' => {'tex' => '\276', 'web' => "\x{be}"}, # 3/4
1037: '(iquest|#191)' => {'tex' => '{/Text \277}', 'web' => "\x{bf}"}, # Inverted ?
1038: '(Agrave|#192)' => {'tex' => '\300', 'web' => "\x{c0}"}, # A Grave.
1039: '(Aacute|#193)' => {'tex' => '\301', 'web' => "\x{c1}"}, # A Acute.
1040: '(Acirc|#194)' => {'tex' => '\302', 'web' => "\x{c2}"}, # A Circumflex.
1041: '(Atilde|#195)' => {'tex' => '\303', 'web' => "\x{c3}"}, # A tilde.
1042: '(Auml|#196)' => {'tex' => '\304', 'web' => "\x{c4}"}, # A umlaut.
1043: '(Aring|#197)' => {'tex' => '\305', 'web' => "\x{c5}"}, # A ring.
1044: '(AElig|#198)' => {'tex' => '\306', 'web' => "\x{c6}"}, # AE ligature.
1045: '(Ccedil|#199)' => {'tex' => '\307', 'web' => "\x{c7}"}, # C cedilla
1046: '(Egrave|#200)' => {'tex' => '\310', 'web' => "\x{c8}"}, # E Accent grave.
1047: '(Eacute|#201)' => {'tex' => '\311', 'web' => "\x{c9}"}, # E acute accent.
1048: '(Ecirc|#202)' => {'tex' => '\312', 'web' => "\x{ca}"}, # E Circumflex.
1049: '(Euml|#203)' => {'tex' => '\313', 'web' => "\x{cb}"}, # E umlaut.
1050: '(Igrave|#204)' => {'tex' => '\314', 'web' => "\x{cc}"}, # I grave accent.
1051: '(Iacute|#205)' => {'tex' => '\315', 'web' => "\x{cd}"}, # I acute accent.
1052: '(Icirc|#206)' => {'tex' => '\316', 'web' => "\x{ce}"}, # I circumflex.
1053: '(Iuml|#207)' => {'tex' => '\317', 'web' => "\x{cf}"}, # I umlaut.
1054: '(ETH|#208)' => {'tex' => '\320', 'web' => "\x{d0}"}, # Icelandic Cap eth.
1055: '(Ntilde|#209)' => {'tex' => '\321', 'web' => "\x{d1}"}, # Ntilde (enyan).
1056: '(Ograve|#210)' => {'tex' => '\322', 'web' => "\x{d2}"}, # O accent grave.
1057: '(Oacute|#211)' => {'tex' => '\323', 'web' => "\x{d3}"}, # O accent acute.
1058: '(Ocirc|#212)' => {'tex' => '\324', 'web' => "\x{d4}"}, # O circumflex.
1059: '(Otilde|#213)' => {'tex' => '\325', 'web' => "\x{d5}"}, # O tilde.
1060: '(Ouml|#214)' => {'tex' => '\326', 'web' => "\x{d6}"}, # O umlaut.
1061: '(times|#215)' => {'tex' => '\327', 'web' => "\x{d7}"}, # Times symbol.
1062: '(Oslash|#216)' => {'tex' => '\330', 'web' => "\x{d8}"}, # O slash.
1063: '(Ugrave|#217)' => {'tex' => '\331', 'web' => "\x{d9}"}, # U accent grave.
1064: '(Uacute|#218)' => {'tex' => '\332', 'web' => "\x{da}"}, # U accent acute.
1065: '(Ucirc|#219)' => {'tex' => '\333', 'web' => "\x{db}"}, # U circumflex.
1066: '(Uuml|#220)' => {'tex' => '\334', 'web' => "\x{dc}"}, # U umlaut.
1067: '(Yacute|#221)' => {'tex' => '\335', 'web' => "\x{dd}"}, # Y accent acute.
1068: '(THORN|#222)' => {'tex' => '\336', 'web' => "\x{de}"}, # Icelandic thorn.
1069: '(szlig|#223)' => {'tex' => '\337', 'web' => "\x{df}"}, # German sharfes s.
1070: '(agrave|#224)' => {'tex' => '\340', 'web' => "\x{e0}"}, # a accent grave.
1071: '(aacute|#225)' => {'tex' => '\341', 'web' => "\x{e1}"}, # a grave.
1072: '(acirc|#226)' => {'tex' => '\342', 'web' => "\x{e2}"}, # a circumflex.
1073: '(atilde|#227)' => {'tex' => '\343', 'web' => "\x{e3}"}, # a tilde.
1074: '(auml|#228)' => {'tex' => '\344', 'web' => "\x{e4}"}, # a umlaut
1075: '(aring|#229)' => {'tex' => '\345', 'web' => "\x{e5}"}, # a ring on top.
1076: '(aelig|#230)' => {'tex' => '\346', 'web' => "\x{e6}"}, # ae ligature.
1077: '(ccedil|#231)' => {'tex' => '\347', 'web' => "\x{e7}"}, # C cedilla
1078: '(egrave|#232)' => {'tex' => '\350', 'web' => "\x{e8}"}, # e accent grave.
1079: '(eacute|#233)' => {'tex' => '\351', 'web' => "\x{e9}"}, # e accent acute.
1080: '(ecirc|#234)' => {'tex' => '\352', 'web' => "\x{ea}" }, # e circumflex.
1081: '(euml|#235)' => {'tex' => '\353', 'web' => "\x{eb}"}, # e umlaut.
1082: '(igrave|#236)' => {'tex' => '\354', 'web' => "\x{ec}"}, # i grave.
1083: '(iacute|#237)' => {'tex' => '\355', 'web' => "\x{ed}"}, # i acute.
1084: '(icirc|#238)' => {'tex' => '\356', 'web' => "\x{ee}"}, # i circumflex.
1085: '(iuml|#239)' => {'tex' => '\357', 'web' => "\x{ef}"}, # i umlaut.
1086: '(eth|#240)' => {'tex' => '\360', 'web' => "\x{f0}"}, # Icelandic eth.
1087: '(ntilde|#241)' => {'tex' => '\361', 'web' => "\x{f1}"}, # n tilde.
1088: '(ograve|#242)' => {'tex' => '\362', 'web' => "\x{f2}"}, # o grave.
1089: '(oacute|#243)' => {'tex' => '\363', 'web' => "\x{f3}"}, # o acute.
1090: '(ocirc|#244)' => {'tex' => '\364', 'web' => "\x{f4}"}, # o circumflex.
1091: '(otilde|#245)' => {'tex' => '\365', 'web' => "\x{f5}"}, # o tilde.
1092: '(ouml|#246)' => {'tex' => '\366', 'web' => "\x{f6}"}, # o umlaut.
1093: '(divide|#247)' => {'tex' => '\367', 'web' => "\x{f7}"}, # division symbol
1094: '(oslash|#248)' => {'tex' => '\370', 'web' => "\x{f8}"}, # o slashed.
1095: '(ugrave|#249)' => {'tex' => '\371', 'web' => "\x{f9}"}, # u accent grave.
1096: '(uacute|#250)' => {'tex' => '\372', 'web' => "\x{fa}"}, # u acute.
1097: '(ucirc|#251)' => {'tex' => '\373', 'web' => "\x{fb}"}, # u circumflex.
1098: '(uuml|#252)' => {'tex' => '\374', 'web' => "\x{fc}"}, # u umlaut.
1099: '(yacute|#253)' => {'tex' => '\375', 'web' => "\x{fd}"}, # y acute accent.
1100: '(thorn|#254)' => {'tex' => '\376', 'web' => "\x{fe}"}, # small thorn (icelandic).
1101: '(yuml|#255)' => {'tex' => '\377', 'web' => "\x{ff}"}, # y umlaut.
1102:
1103: # Latin extended A entities:
1104:
1105: '(OElig|#338)' => {'tex' => '{/Text \326}', 'web' => "\x{152}"}, # OE ligature.
1106: '(oelig|#339)' => {'tex' => '{/Text \366}', 'web' => "\x{153}"}, # oe ligature.
1107: '(Scaron|#352)' => {'tex' => 'S', 'web' => "\x{160}"}, # S caron no printable.
1108: '(scaron|#353)' => {'tex' => 's', 'web' => "\x{161}"}, # s caron no printable.
1109: '(Yuml|#376)' => {'tex' => 'Y', 'web' => "\x{178}"}, # Y umlaut - no printable.
1110:
1111: # Latin extended B.
1112:
1113: '(fnof|#402)' => {'tex' =>'{/Symbol \246}', 'web' => "\x{192}"}, # f with little hook.
1114:
1115: # Standalone accents:
1116:
1117: '(circ|#710)' => {'tex' => '^', 'web' => '^'}, # circumflex.
1118: '(tilde|#732)' => {'tex' => '~', 'web' => '~'}, # tilde.
1119:
1120: # General punctuation. We're not able to make a distinction between
1121: # the various length spacings in the print version. (e.g. en/em/thin).
1122: # the various joiners will be empty strings in the print version too.
1123:
1124:
1125: '(ensp|#8194)' => {'tex' => ' ', 'web' => "\x{2002}"}, # en space.
1126: '(emsp|#8195)' => {'tex' => ' ', 'web' => "\x{2003}"}, # em space.
1127: '(thinsp|#8201)' => {'tex' => ' ', 'web' => "\x{2009}"}, # thin space.
1128: '(zwnj|#8204)' => {'tex' => ' ', 'web' => "\x{200c}"}, # Zero width non joiner.
1129: '(zwj|#8205)' => {'tex' => ' ', 'web' => "\x{200d}"}, # Zero width joiner.
1130: '(lrm|#8206)' => {'tex' => ' ', 'web' => "\x{200e}"}, # Left to right mark
1131: '(rlm|#8207)' => {'tex' => ' ', 'web' => "\x{200f}"}, # right to left mark.
1132: '(ndash|#8211)' => {'tex' => '{/Text \55}', 'web' => "\x{2013}"}, # en dash.
1133: '(mdash|#8212)' => {'tex' => '{/Symbol \55}', 'web' => "\x{2014}"}, # em dash.
1134: '(lsquo|#8216)' => {'tex' => '{/Text \140}', 'web' => "\x{2018}"}, # Left single quote.
1135: '(rsquo|#8217)' => {'tex' => '\47', 'web' => "\x{2019}"}, # Right single quote.
1136: '(sbquo|#8218)' => {'tex' => '\54', 'web' => "\x{201a}"}, # Single low-9 quote.
1137: '(ldquo|#8220)' => {'tex' => '\42', 'web' => "\x{201c}"}, # Left double quote.
1138: '(rdquo|#8221)' => {'tex' => '\42', 'web' => "\x{201d}"}, # Right double quote.
1139: '(bdquo|#8222)' => {'tex' => ',', 'web' => "\x{201e}"}, # Double low-9 quote.
1140: '(dagger|#8224)' => {'tex' => '+', 'web' => "\x{2020}"}, # Is this a dagger I see before me now?
1141: '(Dagger|#8225)' => {'tex' => '\261', 'web' => "\x{2021}"}, # it's handle pointing towards my heart?
1142: '(bull|#8226)' => {'tex' => '\267', 'web' => "\x{2022}"}, # Bullet.
1143: '(hellep|#8230)' => {'tex' => '{/Symbol \274}', 'web' => "\x{2026}"}, # Ellipses.
1144: '(permil|#8240)' => {'tex' => '%_o', 'web' => "\x{2031}"}, # Per mille.
1145: '(prime|#8242)' => {'tex' => '\264', 'web' => "\x{2032}"}, # Prime.
1146: '(Prime|#8243)' => {'tex' => '{/Symbol \262}', 'web' => "\x{2033}"}, # double prime.
1147: '(lsaquo|#8249)' => {'tex' => '<', 'web' => "\x{2039}"}, # < quote.
1148: '(rsaquo|#8250)' => {'tex' => '\74', 'web' => "\x{203a}"}, # > quote.
1149: '(oline|#8254)' => {'tex' => '{/Symbol \140}', 'web' => "\x{203e}"}, # Overline.
1150: '(frasl|#8260)' => {'tex' => '/', 'web' => "\x{2044}"}, # Fraction slash.
1151: '(euro|#8364)' => {'tex' => '{/Symbol \240}', 'web' => "\x{20ac}"}, # Euro currency.
1152:
1153: # Letter like symbols.
1154:
1155: '(weierp|#8472)' => {'tex' => '{/Symbol \303}', 'web' => "\x{2118}"}, # Power set symbol
1156: '(image|#8465)' => {'tex' => '{/Symbol \301}', 'web' => "\x{2111}"}, # Imaginary part
1157: '(real|#8476)' => {'tex' => '{/Symbol \302}', 'web' => "\x{211c}"}, # Real part.
1158: '(trade|#8482)' => {'tex' => '{/Symbol \344}', 'web' => "\x{2122}"}, # trademark symbol.
1159: '(alefsym|#8501)' => {'tex' => '{/Symbol \300}', 'web' => "\x{2135}"}, # Hebrew alef.
1160:
1161: # Arrows of various types and directions.
1162: '(larr|#8592)' => {'tex' => '{/Symbol \254}', 'web' => "\x{2190}"}, # <--
1163: '(uarr|#8593)' => {'tex' => '{/Symbol \255}', 'web' => "\x{2191}"}, # up arrow.
1164: '(rarr|#8594)' => {'tex' => '{/Symbol \256}', 'web' => "\x{2192}"}, # -->
1165: '(darr|#8595)' => {'tex' => '{/Symbol \257}', 'web' => "\x{2193}"}, # down arrow.
1166: '(harr|#8596)' => {'tex' => '{/Symbol \253}', 'web' => "\x{2194}"}, # <-->
1167: '(crarr|#8629)' => {'tex' => '{/Symbol \277}', 'web' => "\x{21b5}"}, # corner arrow down and right.
1168: '(lArr|#8656)' => {'tex' => '{/Symbol \334}', 'web' => "\x{21d0}"}, # <==
1169: '(uArr|#8657)' => {'tex' => '{/Symbol \335}', 'web' => "\x{21d1}"}, # Up double arrow.
1170: '(rArr|#8658)' => {'tex' => '{/Symbol \336}', 'web' => "\x{21d2}"}, # ==>
1171: '(dArr|#8659)' => {'tex' => '{/Symbol \337}', 'web' => "\x{21d3}"}, # Down double arrow.
1172: '(hArr|#8660)' => {'tex' => '{/Symbol \333}', 'web' => "\x{21d4}"}, # <==>
1173:
1174: # Mathematical operators. For some of these we do the best we can in printing.
1175:
1176: '(forall|#8704)' => {'tex' => '{/Symbol \42}', 'web' => "\x{2200}"}, # For all.
1177: '(part|#8706)' => {'tex' => '{/Symbol d}', 'web' => "\x{2202}"}, # partial derivative
1178: '(exist|#8707)' => {'tex' => '{/Symbol \44}', 'web' => "\x{2203}"}, # There exists.
1179: '(empty|#8709)' => {'tex' => '{/Symbol \306}', 'web' => "\x{2205}"}, # Null set.
1180: '(nabla|#8711)' => {'tex' => '{/Symbol \321}', 'web' => "\x{2207}"}, # Gradient e.g.
1181: '(isin|#8712)' => {'tex' => '{/Symbol \316}', 'web' => "\x{2208}"}, # Element of the set.
1182: '(notin|#8713)' => {'tex' => '{/Symbol \317}', 'web' => "\x{2209}"}, # Not an element of
1183: '(ni|#8715)' => {'tex' => '{/Symbol \47}', 'web' => "\x{220b}"}, # Contains as a member
1184: '(prod|#8719)' => {'tex' => '{/Symbol \325}', 'web' => "\x{220f}"}, # Product
1185: '(sum|#8721)' => {'tex' => '{/Symbol \345}', 'web' => "\x{2211}"}, # Sum of.
1186: '(minus|#8722)' => {'tex' => '{/Symbol \55}', 'web' => "\x{2212}"}, # - sign.
1187: '(lowast|#8727)' => {'tex' => '*', 'web' => "\x{2217}"}, # *
1188: '(radic|#8730)' => {'tex' => '{/Symbol \326}', 'web' => "\x{221a}"}, # Square root.
1189: '(prop|#8733)' => {'tex' => '{/Symbol \265}', 'web' => "\x{221d}"}, # Proportional to.
1190: '(infin|#8734)' => {'tex' => '{/Symbol \245}', 'web' => "\x{221e}"}, # Infinity.
1191: '(ang|#8736)' => {'tex' => '{/Symbol \320}', 'web' => "\x{2220}"}, # Angle .
1192: '(and|#8743)' => {'tex' => '{/Symbol \331}', 'web' => "\x{2227}"}, # Logical and.
1193: '(or|#8744)' => {'tex' => '{/Symbol \332}', 'web' => "\x{2228}"}, # Logical or.
1194: '(cap|#8745)' => {'tex' => '{/Symbol \307}', 'web' => "\x{2229}"}, # Set intersection.
1195: '(cup|#8746)' => {'tex' => '{/Symbol \310}', 'web' => "\x{222a}"}, # Set union.
1196: '(int|8747)' => {'tex' => '{/Symbol \362}', 'web' => "\x{222b}"}, # Integral.
1197:
1198: # Some gnuplot guru will have to explain to me why the next three
1199: # require the extra slashes... else they print very funkily.
1200:
1201: '(there4|#8756)' => {'tex' => '{/Symbol \\\134}', 'web' => "\x{2234}"}, # Therefore triple dots.
1202: '(sim|#8764)' => {'tex' => '\\\176', 'web' => "\x{223c}"}, # Simlar to.
1203: '(cong|#8773)' => {'tex' => '{/Symbol \\\100}','web' => "\x{2245}"}, # Congruent to/with.
1204:
1205: '(asymp|#8776)' => {'tex' => '{/Symbol \273}', 'web' => "\x{2248}"}, # Asymptotic to.
1206: '(ne|#8800)' => {'tex' => '{/Symbol \271}', 'web' => "\x{2260}"}, # not equal to.
1207: '(equiv|#8801)' => {'tex' => '{/Symbol \272}', 'web' => "\x{2261}"}, # Equivalent to.
1208: '(le|8804)' => {'tex' => '{/Symbol \243}', 'web' => "\x{2264}"}, # Less than or equal to.
1209: '(ge|8805)' => {'tex' => '{/Symbol \263}', 'web' => "\x{2265}"}, # Greater than or equal to
1210: '(sub|8834)' => {'tex' => '{/Symbol \314}', 'web' => "\x{2282}"}, # Subset of.
1211: '(sup|8835)' => {'tex' => '{/Symbol \311}', 'web' => "\x{2283}"}, # Super set of.
1212: '(nsub|8836)' => {'tex' => '{/Symbol \313}', 'web' => "\x{2284}"}, # not subset of.
1213: '(sube|8838)' => {'tex' => '{/Symbol \315}', 'web' => "\x{2286}"}, # Subset or equal.
1214: '(supe|8839)' => {'tex' => '{/Symbol \312}', 'web' => "\x{2287}"}, # Superset or equal
1215: '(oplus|8853)' => {'tex' => '{/Symbol \305}', 'web' => "\x{2295}"}, # O with plus inside
1216: '(otimes|8855)' => {'tex' => '{/Symbol \304}', 'web' => "\x{2297}"}, # O with times.
1217: '(perp|8869)' => {'tex' => '{/Symbol \136}', 'web' => "\x{22a5}"}, # Perpendicular.
1218: '(sdot|8901)' => {'tex' => '{/Symbol \227}', 'web' => "\x{22c5}"}, # Dot operator.
1219:
1220: # Misc. technical symbols:
1221:
1222: '(lceil|8698)' => {'tex' => '{/Symbol \351}', 'web' => "\x{2308}"}, # Left ceiling.
1223: '(rceil|8969)' => {'tex' => '{/Symbol \371}', 'web' => "\x{2309}"}, # Right ceiling.
1224: '(lfloor|8970)' => {'tex' => '{/Symbol \353}', 'web' => "\x{230a}"}, # Left floor.
1225: '(rfloor|8971)' => {'tex' => '{/Symbol \373}', 'web' => "\x{230b}"}, # Right floor.
1226:
1227: # The gnuplot png font evidently does not have the big angle brackets at
1228: # positions 0x2329, 0x232a so use ordinary brackets.
1229:
1230: '(lang|9001)' => {'tex' => '{/Symbol \341}', 'web' => '<'}, # Left angle bracket.
1231: '(rang|9002)' => {'tex' => '{/Symbol \361}', 'web' => '>'}, # Right angle bracket.
1232:
1233: # Gemoetric shapes.
1234:
1235: '(loz|9674)' => {'tex' => '{/Symbol \340}', 'web' => "\x{25ca}"}, # Lozenge.
1236:
1237: # Misc. symbols
1238:
1239: '(spades|9824)' => {'tex' => '{/Symbol \252}', 'web' => "\x{2660}"},
1240: '(clubs|9827)' => {'tex' => '{/Symbol \247}', 'web' => "\x{2663}"},
1241: '(hearts|9829)' => {'tex' => '{/Symbol \251}', 'web' => "\x{2665}"},
1242: '(diams|9830)' => {'tex' => '{/Symbol \250}', 'web' => "\x{2666}"}
1243:
1244: );
1245:
1246:
1247: sub replace_entities {
1248: my ($target,$text) = @_;
1249: $text =~ s{([_^~\{\}]|\\\\)}{\\\\$1}g;
1250: while (my ($re, $replace) = each(%lookup)) {
1251: my $repl = $replace->{$target};
1252: $text =~ s/&$re;/$replace->{$target}/g;
1253: }
1254: $text =~ s{(&)}{\\\\$1}g;
1255: return $text;
1256: }
1257:
1258: ##------------------------------------------------------------------- title
1259: sub start_title {
1260: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1261: my $result='';
1262: if ($target eq 'web' || $target eq 'tex') {
1263: $title = &Apache::lonxml::get_all_text("/title",$parser,$style);
1264: $title=&Apache::run::evaluate($title,$safeeval,$$parstack[-1]);
1265: $title =~ s/\n/ /g;
1266: if (length($title) > $max_str_len) {
1267: $title = substr($title,0,$max_str_len);
1268: }
1269: $title = &parse_label($target,$title);
1270: } elsif ($target eq 'edit') {
1271: $result.=&Apache::edit::tag_start($target,$token,'Plot Title');
1272: my $text=&Apache::lonxml::get_all_text("/title",$parser,$style);
1273: $result.=&Apache::edit::editline('',$text,'',60);
1274: } elsif ($target eq 'modified') {
1275: $result.=&Apache::edit::rebuild_tag($token);
1276: $result.=&Apache::edit::modifiedfield("/title",$parser);
1277: }
1278: return $result;
1279: }
1280:
1281: sub end_title {
1282: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1283: my $result = '';
1284: if ($target eq 'web' || $target eq 'tex') {
1285: } elsif ($target eq 'edit') {
1286: $result.=&Apache::edit::tag_end($target,$token);
1287: }
1288: return $result;
1289: }
1290: ##------------------------------------------------------------------- xlabel
1291: sub start_xlabel {
1292: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1293: my $result='';
1294: if ($target eq 'web' || $target eq 'tex') {
1295: $xlabel = &Apache::lonxml::get_all_text("/xlabel",$parser,$style);
1296: $xlabel=&Apache::run::evaluate($xlabel,$safeeval,$$parstack[-1]);
1297: $xlabel =~ s/\n/ /g;
1298: if (length($xlabel) > $max_str_len) {
1299: $xlabel = substr($xlabel,0,$max_str_len);
1300: }
1301: $xlabel = &parse_label($target,$xlabel);
1302: } elsif ($target eq 'edit') {
1303: $result.=&Apache::edit::tag_start($target,$token,'Plot Xlabel');
1304: my $text=&Apache::lonxml::get_all_text("/xlabel",$parser,$style);
1305: $result.=&Apache::edit::editline('',$text,'',60);
1306: } elsif ($target eq 'modified') {
1307: $result.=&Apache::edit::rebuild_tag($token);
1308: $result.=&Apache::edit::modifiedfield("/xlabel",$parser);
1309: }
1310: return $result;
1311: }
1312:
1313: sub end_xlabel {
1314: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1315: my $result = '';
1316: if ($target eq 'web' || $target eq 'tex') {
1317: } elsif ($target eq 'edit') {
1318: $result.=&Apache::edit::tag_end($target,$token);
1319: }
1320: return $result;
1321: }
1322:
1323: ##------------------------------------------------------------------- ylabel
1324: sub start_ylabel {
1325: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1326: my $result='';
1327: if ($target eq 'web' || $target eq 'tex') {
1328: $ylabel = &Apache::lonxml::get_all_text("/ylabel",$parser,$style);
1329: $ylabel = &Apache::run::evaluate($ylabel,$safeeval,$$parstack[-1]);
1330: $ylabel =~ s/\n/ /g;
1331: if (length($ylabel) > $max_str_len) {
1332: $ylabel = substr($ylabel,0,$max_str_len);
1333: }
1334: $ylabel = &parse_label($target,$ylabel);
1335: } elsif ($target eq 'edit') {
1336: $result .= &Apache::edit::tag_start($target,$token,'Plot Ylabel');
1337: my $text = &Apache::lonxml::get_all_text("/ylabel",$parser,$style);
1338: $result .= &Apache::edit::editline('',$text,'',60);
1339: } elsif ($target eq 'modified') {
1340: $result.=&Apache::edit::rebuild_tag($token);
1341: $result.=&Apache::edit::modifiedfield("/ylabel",$parser);
1342: }
1343: return $result;
1344: }
1345:
1346: sub end_ylabel {
1347: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1348: my $result = '';
1349: if ($target eq 'web' || $target eq 'tex') {
1350: } elsif ($target eq 'edit') {
1351: $result.=&Apache::edit::tag_end($target,$token);
1352: }
1353: return $result;
1354: }
1355:
1356: ##------------------------------------------------------------------- label
1357: sub start_label {
1358: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1359: my $result='';
1360: if ($target eq 'web' || $target eq 'tex') {
1361: my %label;
1362: &get_attributes(\%label,\%label_defaults,$parstack,$safeeval,
1363: $tagstack->[-1]);
1364: my $text = &Apache::lonxml::get_all_text("/label",$parser,$style);
1365: $text = &Apache::run::evaluate($text,$safeeval,$$parstack[-1]);
1366: $text =~ s/\n/ /g;
1367: $text = substr($text,0,$max_str_len) if (length($text) > $max_str_len);
1368: $label{'text'} = &parse_label($target,$text);
1369: push(@labels,\%label);
1370: } elsif ($target eq 'edit') {
1371: $result .= &Apache::edit::tag_start($target,$token,'Plot Label');
1372: $result .= &edit_attributes($target,$token,\%label_defaults);
1373: my $text = &Apache::lonxml::get_all_text("/label",$parser,$style);
1374: $result .= &Apache::edit::end_row().
1375: &Apache::edit::start_spanning_row().
1376: &Apache::edit::editline('',$text,'',60);
1377: } elsif ($target eq 'modified') {
1378: &Apache::edit::get_new_args
1379: ($token,$parstack,$safeeval,keys(%label_defaults));
1380: $result.=&Apache::edit::rebuild_tag($token);
1381: $result.=&Apache::edit::modifiedfield("/label",$parser);
1382: }
1383: return $result;
1384: }
1385:
1386: sub end_label {
1387: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1388: my $result = '';
1389: if ($target eq 'web' || $target eq 'tex') {
1390: } elsif ($target eq 'edit') {
1391: $result.=&Apache::edit::tag_end($target,$token);
1392: }
1393: return $result;
1394: }
1395:
1396: ##------------------------------------------------------------------- curve
1397: sub start_curve {
1398: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1399: my $result='';
1400: &Apache::lonxml::register('Apache::lonplot',('function','data'));
1401: push (@Apache::lonxml::namespace,'curve');
1402: if ($target eq 'web' || $target eq 'tex') {
1403: my %curve;
1404: &get_attributes(\%curve,\%curve_defaults,$parstack,$safeeval,
1405: $tagstack->[-1]);
1406: push (@curves,\%curve);
1407: } elsif ($target eq 'edit') {
1408: $result .= &Apache::edit::tag_start($target,$token,'Curve');
1409: $result .= &edit_attributes($target,$token,\%curve_defaults,
1410: \@curve_edit_order)
1411: .&Apache::edit::end_row()
1412: .&Apache::edit::start_spanning_row();
1413:
1414: } elsif ($target eq 'modified') {
1415: my $constructtag=&Apache::edit::get_new_args
1416: ($token,$parstack,$safeeval,keys(%curve_defaults));
1417: if ($constructtag) {
1418: #
1419: # Fix up the color attribute as jcolor does not prepend an x
1420: #
1421: my $value = $token->[2]{'color'};
1422: if (defined $value && !($value =~ /^x/)) {
1423: $token->[2]{'color'} = 'x' . $value;
1424: }
1425: $result = &Apache::edit::rebuild_tag($token);
1426: }
1427: }
1428: return $result;
1429: }
1430:
1431: sub end_curve {
1432: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1433: my $result = '';
1434: pop @Apache::lonxml::namespace;
1435: &Apache::lonxml::deregister('Apache::lonplot',('function','data'));
1436: if ($target eq 'web' || $target eq 'tex') {
1437: } elsif ($target eq 'edit') {
1438: $result.=&Apache::edit::tag_end($target,$token);
1439: }
1440: return $result;
1441: }
1442:
1443: ##------------------------------------------------------------ curve function
1444: sub start_function {
1445: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1446: my $result='';
1447: if ($target eq 'web' || $target eq 'tex') {
1448: if (exists($curves[-1]->{'data'})) {
1449: &Apache::lonxml::warning
1450: ('Use of the <b>curve function</b> tag precludes use of '.
1451: ' the <b>curve data</b> tag. '.
1452: 'The curve data tag will be omitted in favor of the '.
1453: 'curve function declaration.');
1454: delete $curves[-1]->{'data'} ;
1455: }
1456: my $function = &Apache::lonxml::get_all_text("/function",$parser,
1457: $style);
1458: $function = &Apache::run::evaluate($function,$safeeval,$$parstack[-1]);
1459: $function=~s/\^/\*\*/gs;
1460: $curves[-1]->{'function'} = $function;
1461: } elsif ($target eq 'edit') {
1462: $result .= &Apache::edit::tag_start($target,$token,'Gnuplot compatible curve function');
1463: my $text = &Apache::lonxml::get_all_text("/function",$parser,$style);
1464: $result .= &Apache::edit::editline('',$text,'',60);
1465: } elsif ($target eq 'modified') {
1466: $result.=&Apache::edit::rebuild_tag($token);
1467: $result.=&Apache::edit::modifiedfield("/function",$parser);
1468: }
1469: return $result;
1470: }
1471:
1472: sub end_function {
1473: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1474: my $result = '';
1475: if ($target eq 'web' || $target eq 'tex') {
1476: } elsif ($target eq 'edit') {
1477: $result .= &Apache::edit::end_table();
1478: }
1479: return $result;
1480: }
1481:
1482: ##------------------------------------------------------------ curve data
1483: sub start_data {
1484: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1485: my $result='';
1486: if ($target eq 'web' || $target eq 'tex') {
1487: if (exists($curves[-1]->{'function'})) {
1488: &Apache::lonxml::warning
1489: ('Use of the <b>curve function</b> tag precludes use of '.
1490: ' the <b>curve data</b> tag. '.
1491: 'The curve function tag will be omitted in favor of the '.
1492: 'curve data declaration.');
1493: delete($curves[-1]->{'function'});
1494: }
1495: my $datatext = &Apache::lonxml::get_all_text("/data",$parser,$style);
1496: $datatext=&Apache::run::evaluate($datatext,$safeeval,$$parstack[-1]);
1497: # Deal with cases where we're given an array...
1498: if ($datatext =~ /^\@/) {
1499: $datatext = &Apache::run::run('return "'.$datatext.'"',
1500: $safeeval,1);
1501: }
1502: $datatext =~ s/\s+/ /g;
1503: # Need to do some error checking on the @data array -
1504: # make sure it's all numbers and make sure each array
1505: # is of the same length.
1506: my @data;
1507: if ($datatext =~ /,/) { # comma deliminated
1508: @data = split /,/,$datatext;
1509: } else { # Assume it's space separated.
1510: @data = split / /,$datatext;
1511: }
1512: for (my $i=0;$i<=$#data;$i++) {
1513: # Check that it's non-empty
1514: if (! defined($data[$i])) {
1515: &Apache::lonxml::warning(
1516: 'undefined curve data value. Replacing with '.
1517: ' pi/e = 1.15572734979092');
1518: $data[$i] = 1.15572734979092;
1519: }
1520: # Check that it's a number
1521: if (! &$real_test($data[$i]) & ! &$int_test($data[$i])) {
1522: &Apache::lonxml::warning(
1523: 'Bad curve data value of '.$data[$i].' Replacing with '.
1524: ' pi/e = 1.15572734979092');
1525: $data[$i] = 1.15572734979092;
1526: }
1527: }
1528: # complain if the number of data points is not the same as
1529: # in previous sets of data.
1530: if (($curves[-1]->{'data'}) && ($#data != $#{$curves[-1]->{'data'}->[0]})){
1531: &Apache::lonxml::warning
1532: ('Number of data points is not consistent with previous '.
1533: 'number of data points');
1534: }
1535: push @{$curves[-1]->{'data'}},\@data;
1536: } elsif ($target eq 'edit') {
1537: $result .= &Apache::edit::tag_start($target,$token,'Comma or space deliminated curve data');
1538: my $text = &Apache::lonxml::get_all_text("/data",$parser,$style);
1539: $result .= &Apache::edit::editline('',$text,'',60);
1540: } elsif ($target eq 'modified') {
1541: $result.=&Apache::edit::rebuild_tag($token);
1542: $result.=&Apache::edit::modifiedfield("/data",$parser);
1543: }
1544: return $result;
1545: }
1546:
1547: sub end_data {
1548: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1549: my $result = '';
1550: if ($target eq 'web' || $target eq 'tex') {
1551: } elsif ($target eq 'edit') {
1552: $result .= &Apache::edit::end_table();
1553: }
1554: return $result;
1555: }
1556:
1557: ##------------------------------------------------------------------- axis
1558: sub start_axis {
1559: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1560: my $result='';
1561: if ($target eq 'web' || $target eq 'tex') {
1562: &get_attributes(\%axis,\%axis_defaults,$parstack,$safeeval,
1563: $tagstack->[-1]);
1564: } elsif ($target eq 'edit') {
1565: $result .= &Apache::edit::tag_start($target,$token,'Plot Axes');
1566: $result .= &edit_attributes($target,$token,\%axis_defaults,
1567: \@axis_edit_order);
1568: } elsif ($target eq 'modified') {
1569: my $constructtag=&Apache::edit::get_new_args
1570: ($token,$parstack,$safeeval,keys(%axis_defaults));
1571:
1572: if ($constructtag) {
1573: #
1574: # Fix up the color attribute since jchooser does not
1575: # prepend an x to the color:
1576: #
1577: my $value = $token->[2]{'color'};
1578: if (defined $value && !($value =~ /^x/)) {
1579: $token->[2]{'color'} = 'x' . $value;
1580: }
1581:
1582: $result = &Apache::edit::rebuild_tag($token);
1583: }
1584: }
1585: return $result;
1586: }
1587:
1588: sub end_axis {
1589: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1590: my $result = '';
1591: if ($target eq 'web' || $target eq 'tex') {
1592: } elsif ($target eq 'edit') {
1593: $result.=&Apache::edit::tag_end($target,$token);
1594: } elsif ($target eq 'modified') {
1595: }
1596: return $result;
1597: }
1598:
1599: ###################################################################
1600: ## ##
1601: ## Utility Functions ##
1602: ## ##
1603: ###################################################################
1604:
1605: ##----------------------------------------------------------- set_defaults
1606: sub set_defaults {
1607: my ($var,$defaults) = @_;
1608: my $key;
1609: foreach $key (keys(%$defaults)) {
1610: $var->{$key} = $defaults->{$key}->{'default'};
1611: }
1612: }
1613:
1614: ##------------------------------------------------------------------- misc
1615: sub get_attributes{
1616: my ($values,$defaults,$parstack,$safeeval,$tag) = @_;
1617: foreach my $attr (keys(%{$defaults})) {
1618: if ($attr eq 'texwidth' || $attr eq 'texfont') {
1619: $values->{$attr} =
1620: &Apache::lonxml::get_param($attr,$parstack,$safeeval,undef,1);
1621: } else {
1622: $values->{$attr} =
1623: &Apache::lonxml::get_param($attr,$parstack,$safeeval);
1624: }
1625: if ($values->{$attr} eq '' | !defined($values->{$attr})) {
1626: $values->{$attr} = $defaults->{$attr}->{'default'};
1627: next;
1628: }
1629: my $test = $defaults->{$attr}->{'test'};
1630: if (! &$test($values->{$attr})) {
1631: &Apache::lonxml::warning
1632: ($tag.':'.$attr.': Bad value.'.'Replacing your value with : '
1633: .$defaults->{$attr}->{'default'} );
1634: $values->{$attr} = $defaults->{$attr}->{'default'};
1635: }
1636: }
1637: return ;
1638: }
1639:
1640: ##------------------------------------------------------- write_gnuplot_file
1641: sub write_gnuplot_file {
1642: my ($tmpdir,$filename,$target)= @_;
1643: my ($fontsize, $font_properties) = &get_font($target);
1644: my $gnuplot_input = '';
1645: my $curve;
1646: #
1647: # Check to be sure we do not have any empty curves
1648: my @curvescopy;
1649: foreach my $curve (@curves) {
1650: if (exists($curve->{'function'})) {
1651: if ($curve->{'function'} !~ /^\s*$/) {
1652: push(@curvescopy,$curve);
1653: }
1654: } elsif (exists($curve->{'data'})) {
1655: foreach my $data (@{$curve->{'data'}}) {
1656: if (scalar(@$data) > 0) {
1657: push(@curvescopy,$curve);
1658: last;
1659: }
1660: }
1661: }
1662: }
1663: @curves = @curvescopy;
1664: # Collect all the colors
1665: my @Colors;
1666: push @Colors, $Apache::lonplot::plot{'bgcolor'};
1667: push @Colors, $Apache::lonplot::plot{'fgcolor'};
1668: push @Colors, (defined($axis{'color'})?$axis{'color'}:$Apache::lonplot::plot{'fgcolor'});
1669: foreach $curve (@curves) {
1670: push @Colors, ($curve->{'color'} ne '' ?
1671: $curve->{'color'} :
1672: $Apache::lonplot::plot{'fgcolor'} );
1673: }
1674:
1675: # set term
1676: if ($target eq 'web') {
1677: $gnuplot_input .= 'set terminal png enhanced nocrop ';
1678: $gnuplot_input .= 'transparent ' if ($Apache::lonplot::plot{'transparent'} eq 'on');
1679: $gnuplot_input .= 'font "'.$Apache::lonnet::perlvar{'lonFontsDir'}.
1680: '/'.$font_properties->{'file'}.'.ttf" ';
1681: $gnuplot_input .= $fontsize;
1682: $gnuplot_input .= ' size '.$Apache::lonplot::plot{'width'}.','.$Apache::lonplot::plot{'height'}.' ';
1683: $gnuplot_input .= "@Colors\n";
1684: # set output
1685: $gnuplot_input .= "set output\n";
1686: } elsif ($target eq 'tex') {
1687: $gnuplot_input .= "set term postscript eps enhanced $Apache::lonplot::plot{'plotcolor'} dash ";
1688: if (!$font_properties->{'tex_no_file'}) {
1689: $gnuplot_input .=
1690: 'fontfile "'.$Apache::lonnet::perlvar{'lonFontsDir'}.
1691: '/'.$font_properties->{'file'}.'.pfb" ';
1692: }
1693: $gnuplot_input .= ' "'.$font_properties->{'printname'}.'" ';
1694: $gnuplot_input .= $fontsize;
1695: $gnuplot_input .= "\nset output \"".$tmpdir.
1696: &unescape($filename).".eps\"\n";
1697: $gnuplot_input .= "set encoding iso_8859_1\n"; # Get access to extended font.
1698:
1699: }
1700: $gnuplot_input .= "set encoding utf8\n";
1701: # cartesian or polar plot?
1702: if (lc($Apache::lonplot::plot{'plottype'}) eq 'polar') {
1703: $gnuplot_input .= 'set polar'.$/;
1704: } else {
1705: # Assume Cartesian
1706: }
1707: # cartesian or polar grid?
1708: if (lc($Apache::lonplot::plot{'gridtype'}) eq 'polar') {
1709: $gnuplot_input .= 'set grid polar'.$/;
1710: } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'linear-log') {
1711: $gnuplot_input .= 'set logscale x'.$/;
1712: } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'log-linear') {
1713: $gnuplot_input .= 'set logscale y'.$/;
1714: } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'log-log') {
1715: $gnuplot_input .= 'set logscale x'.$/;
1716: $gnuplot_input .= 'set logscale y'.$/;
1717: } else {
1718: # Assume Cartesian
1719: }
1720: # solid or pattern for boxes?
1721: if (lc($Apache::lonplot::plot{'fillstyle'}) eq 'solid') {
1722: $gnuplot_input .= 'set style fill solid '.
1723: $Apache::lonplot::plot{'solid'}.$Apache::lonplot::plot{'box_border'}.$/;
1724: } elsif (lc($Apache::lonplot::plot{'fillstyle'}) eq 'pattern') {
1725: $gnuplot_input .= 'set style fill pattern '.$Apache::lonplot::plot{'pattern'}.$Apache::lonplot::plot{'box_border'}.$/;
1726: } elsif (lc($Apache::lonplot::plot{'fillstyle'}) eq 'empty') {
1727: }
1728: # margin
1729: if (lc($Apache::lonplot::plot{'lmargin'}) ne 'default') {
1730: $gnuplot_input .= 'set lmargin '.$Apache::lonplot::plot{'lmargin'}.$/;
1731: }
1732: if (lc($Apache::lonplot::plot{'rmargin'}) ne 'default') {
1733: $gnuplot_input .= 'set rmargin '.$Apache::lonplot::plot{'rmargin'}.$/;
1734: }
1735: if (lc($Apache::lonplot::plot{'tmargin'}) ne 'default') {
1736: $gnuplot_input .= 'set tmargin '.$Apache::lonplot::plot{'tmargin'}.$/;
1737: }
1738: if (lc($Apache::lonplot::plot{'bmargin'}) ne 'default') {
1739: $gnuplot_input .= 'set bmargin '.$Apache::lonplot::plot{'bmargin'}.$/;
1740: }
1741:
1742: # tic scales
1743: if ($version > 4) {
1744: $gnuplot_input .= 'set tics scale '.
1745: $Apache::lonplot::plot{'major_ticscale'}.', '.$Apache::lonplot::plot{'minor_ticscale'}.$/;
1746: } else {
1747: $gnuplot_input .= 'set ticscale '.
1748: $Apache::lonplot::plot{'major_ticscale'}.' '.$Apache::lonplot::plot{'minor_ticscale'}.$/;
1749: }
1750: #boxwidth
1751: if (lc($Apache::lonplot::plot{'boxwidth'}) ne '') {
1752: $gnuplot_input .= 'set boxwidth '.$Apache::lonplot::plot{'boxwidth'}.$/;
1753: }
1754: # gridlayer
1755: $gnuplot_input .= 'set grid noxtics noytics front '.$/
1756: if ($Apache::lonplot::plot{'gridlayer'} eq 'on');
1757:
1758: # grid
1759: $gnuplot_input .= 'set grid'.$/ if ($Apache::lonplot::plot{'grid'} eq 'on');
1760: # border
1761: $gnuplot_input .= ($Apache::lonplot::plot{'border'} eq 'on'?
1762: 'set border'.$/ :
1763: 'set noborder'.$/ );
1764: # sampling rate for non-data curves
1765: $gnuplot_input .= "set samples $Apache::lonplot::plot{'samples'}\n";
1766: # title, xlabel, ylabel
1767: # titles
1768: my $extra_space_x = ($xtics{'location'} eq 'axis') ? ' 0, -0.5 ' : '';
1769: my $extra_space_y = ($ytics{'location'} eq 'axis') ? ' -0.5, 0 ' : '';
1770:
1771: if ($target eq 'tex') {
1772: $gnuplot_input .= "set title \"$title\" font \"".$font_properties->{'printname'}.",".$fontsize."pt\"\n" if (defined($title)) ;
1773: $gnuplot_input .= "set xlabel \"$xlabel\" $extra_space_x font \"".$font_properties->{'printname'}.",".$fontsize."pt\"\n" if (defined($xlabel));
1774: $gnuplot_input .= "set ylabel \"$ylabel\" $extra_space_y font \"".$font_properties->{'printname'}.",".$fontsize."pt\"\n" if (defined($ylabel));
1775: } else {
1776: $gnuplot_input .= "set title \"$title\" \n" if (defined($title)) ;
1777: $gnuplot_input .= "set xlabel \"$xlabel\" $extra_space_x \n" if (defined($xlabel));
1778: $gnuplot_input .= "set ylabel \"$ylabel\" $extra_space_y \n" if (defined($ylabel));
1779: }
1780: # tics
1781: if (%xtics) {
1782: $gnuplot_input .= "set xtics $xtics{'location'} ";
1783: $gnuplot_input .= ( $xtics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1784: $gnuplot_input .= "$xtics{'start'}, ";
1785: $gnuplot_input .= "$xtics{'increment'}, ";
1786: $gnuplot_input .= "$xtics{'end'} ";
1787: if ($target eq 'tex') {
1788: $gnuplot_input .= 'font "Helvetica,22"'; # Needed in iso 8859-1 enc.
1789: }
1790: $gnuplot_input .= "\n";
1791: if ($xtics{'minorfreq'} != 0) {
1792: $gnuplot_input .= "set mxtics ".$xtics{'minorfreq'}."\n";
1793: }
1794: } else {
1795: if ($target eq 'tex') {
1796: $gnuplot_input .= 'set xtics font "Helvetica,22"'."\n"; # needed in iso 8859-1 enc
1797: }
1798: }
1799: if (%ytics) {
1800: $gnuplot_input .= "set ytics $ytics{'location'} ";
1801: $gnuplot_input .= ( $ytics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1802: $gnuplot_input .= "$ytics{'start'}, ";
1803: $gnuplot_input .= "$ytics{'increment'}, ";
1804: $gnuplot_input .= "$ytics{'end'} ";
1805: if ($target eq 'tex') {
1806: $gnuplot_input .= 'font "Helvetica,22"'; # Needed in iso-8859-1 encoding.
1807: }
1808: $gnuplot_input .= "\n";
1809: if ($ytics{'minorfreq'} != 0) {
1810: $gnuplot_input .= "set mytics ".$ytics{'minorfreq'}."\n";
1811: }
1812: } else {
1813: if ($target eq 'tex') {
1814: $gnuplot_input .= 'set ytics font "Helvetica,22"'."\n"; # Needed for iso 8859-1 enc.
1815: }
1816: }
1817: # axis
1818: if (%axis) {
1819: if ($axis{'xformat'} ne 'on') {
1820: $gnuplot_input .= "set format x ";
1821: if ($axis{'xformat'} eq 'off') {
1822: $gnuplot_input .= "\"\"\n";
1823: } else {
1824: $gnuplot_input .= "\"\%.".$axis{'xformat'}."\"\n";
1825: }
1826: }
1827: if ($axis{'yformat'} ne 'on') {
1828: $gnuplot_input .= "set format y ";
1829: if ($axis{'yformat'} eq 'off') {
1830: $gnuplot_input .= "\"\"\n";
1831: } else {
1832: $gnuplot_input .= "\"\%.".$axis{'yformat'}."\"\n";
1833: }
1834: }
1835: $gnuplot_input .= "set xrange \[$axis{'xmin'}:$axis{'xmax'}\]\n";
1836: $gnuplot_input .= "set yrange \[$axis{'ymin'}:$axis{'ymax'}\]\n";
1837: if ($axis{'xzero'} ne 'off') {
1838: $gnuplot_input .= "set xzeroaxis ";
1839: if ($axis{'xzero'} eq 'line' || $axis{'xzero'} eq 'thick-line') {
1840: $gnuplot_input .= "lt -1 ";
1841: if ($axis{'xzero'} eq 'thick-line') {
1842: $gnuplot_input .= "lw 3 ";
1843: }
1844: }
1845: $gnuplot_input .= "\n";
1846: }
1847: if ($axis{'yzero'} ne 'off') {
1848: $gnuplot_input .= "set yzeroaxis ";
1849: if ($axis{'yzero'} eq 'line' || $axis{'yzero'} eq 'thick-line') {
1850: $gnuplot_input .= "lt -1 ";
1851: if ($axis{'yzero'} eq 'thick-line') {
1852: $gnuplot_input .= "lw 3 ";
1853: }
1854: }
1855: $gnuplot_input .= "\n";
1856: }
1857: }
1858: # Key
1859: if (%key) {
1860: $gnuplot_input .= 'set key '.$key{'pos'}.' ';
1861: if ($key{'title'} ne '') {
1862: $gnuplot_input .= 'title "'.$key{'title'}.'" ';
1863: }
1864: $gnuplot_input .= ($key{'box'} eq 'on' ? 'box ' : 'nobox ').$/;
1865: } else {
1866: $gnuplot_input .= 'set nokey'.$/;
1867: }
1868: # labels
1869: my $label;
1870: foreach $label (@labels) {
1871: $gnuplot_input .= 'set label "'.$label->{'text'}.'" at '.
1872: $label->{'xpos'}.','.$label->{'ypos'};
1873: if ($label->{'rotate'} ne '') {
1874: $gnuplot_input .= ' rotate by '.$label->{'rotate'};
1875: }
1876: $gnuplot_input .= ' '.$label->{'justify'};
1877:
1878: if ($target eq 'tex') {
1879: $gnuplot_input .=' font "'.$font_properties->{'printname'}.','.$fontsize.'pt"' ;
1880: }
1881: $gnuplot_input .= $/;
1882: }
1883: if ($target eq 'tex') {
1884: $gnuplot_input .="set size 1,".$Apache::lonplot::plot{'height'}/$Apache::lonplot::plot{'width'}*1.38;
1885: $gnuplot_input .="\n";
1886: }
1887: # curves
1888: #
1889: # Each curve will have its very own linestyle.
1890: # (This should work just fine in web rendition I think).
1891: # The line_xxx variables will hold the elements of the line style.
1892: # type (solid/dashed), color, width
1893: #
1894: my $linestyle_index = 50;
1895: my $line_width = '';
1896:
1897: # If arrows are needed there will be an arrow style for each as well:
1898: #
1899:
1900: my $arrow_style_index = 50;
1901:
1902: my $plot_command;
1903: my $plot_type;
1904:
1905: for (my $i = 0;$i<=$#curves;$i++) {
1906: $curve = $curves[$i];
1907: $plot_command.= ', ' if ($i > 0);
1908: if ($target eq 'tex') {
1909: $curve->{'linewidth'} *= 2;
1910: }
1911: $line_width = $curve->{'linewidth'};
1912: if (exists($curve->{'function'})) {
1913: $plot_type =
1914: $curve->{'function'}.' title "'.
1915: $curve->{'name'}.'" with '.
1916: $curve->{'linestyle'};
1917: } elsif (exists($curve->{'data'})) {
1918: # Store data values in $datatext
1919: my $datatext = '';
1920: # get new filename
1921: my $datafilename = "$tmpdir/$filename.data.$i";
1922: my $fh=Apache::File->new(">$datafilename");
1923: # Compile data
1924: my @Data = @{$curve->{'data'}};
1925: my @Data0 = @{$Data[0]};
1926: for (my $i =0; $i<=$#Data0; $i++) {
1927: my $dataset;
1928: foreach $dataset (@Data) {
1929: $datatext .= $dataset->[$i] . ' ';
1930: }
1931: $datatext .= $/;
1932: }
1933: # write file
1934: print $fh $datatext;
1935: close($fh);
1936: # generate gnuplot text
1937: $plot_type = '"'.$datafilename.'" title "'.
1938: $curve->{'name'}.'" with '.
1939: $curve->{'linestyle'};
1940: }
1941: my $pointtype = '';
1942: my $pointsize = '';
1943:
1944: # Figure out the linestyle:
1945:
1946: my $lt = $curve->{'linetype'} ne '' ? $curve->{'linetype'}
1947: : 'solid'; # Line type defaults to solid.
1948: # The mapping of lt -> the actual gnuplot line type depends on the target:
1949:
1950: if ($target eq 'tex') {
1951: $lt = $ps_linetypes{$lt};
1952: } else {
1953: $lt = $linetypes{$lt}
1954: }
1955:
1956: my $color = $curve->{'color'};
1957: $color =~ s/^x/#/; # Convert xhex color -> #hex color.
1958:
1959: my $style_command = "set style line $linestyle_index $pointtype $pointsize linetype $lt linewidth $line_width lc rgb '$color'\n";
1960: $gnuplot_input .= $style_command;
1961:
1962:
1963:
1964: if (($curve->{'linestyle'} eq 'points') ||
1965: ($curve->{'linestyle'} eq 'linespoints') ||
1966: ($curve->{'linestyle'} eq 'errorbars') ||
1967: ($curve->{'linestyle'} eq 'xerrorbars') ||
1968: ($curve->{'linestyle'} eq 'yerrorbars') ||
1969: ($curve->{'linestyle'} eq 'xyerrorbars')) {
1970:
1971: $pointtype =' pointtype '.$curve->{'pointtype'};
1972: $pointsize =' pointsize '.$curve->{'pointsize'};
1973: } elsif ($curve->{'linestyle'} eq 'filledcurves') {
1974: $plot_command.= ' '.$curve->{'limit'};
1975: } elsif ($curve->{'linestyle'} eq 'vector') {
1976:
1977: # Create the arrow head style add it to
1978: # $gnuplot_input..and ensure it gets
1979: # Selected in the plot command.
1980:
1981: $gnuplot_input .= "set style arrow $arrow_style_index ";
1982: $gnuplot_input .= ' ' . $curve->{'arrowhead'};
1983: $gnuplot_input .= ' size ' . $curve->{'arrowlength'};
1984: $gnuplot_input .= ','.$curve->{'arrowangle'};
1985: $gnuplot_input .= ',' . $curve->{'arrowbackangle'};
1986: $gnuplot_input .= ' ' . $curve->{'arrowstyle'} . " ls $linestyle_index\n";
1987:
1988:
1989: $plot_command .= " arrowstyle $arrow_style_index ";
1990: $arrow_style_index++;
1991: }
1992:
1993:
1994:
1995:
1996: # The condition below is because gnuplot lumps the linestyle in with the
1997: # arrowstyle _sigh_.
1998:
1999: if ($curve->{'linestyle'} ne 'vector') {
2000: $plot_command.= " ls $linestyle_index";
2001: }
2002:
2003: $gnuplot_input .= 'plot ' . $plot_type . ' ' . $plot_command . "\n";
2004: $linestyle_index++; # Each curve get a unique linestyle.
2005: }
2006: # Write the output to a file.
2007: open (my $fh, "> $tmpdir$filename.data");
2008: binmode($fh, ':utf8');
2009: print $fh $gnuplot_input;
2010: close($fh);
2011: # That's all folks.
2012: return ;
2013: }
2014:
2015: #---------------------------------------------- check_inputs
2016: sub check_inputs {
2017: ## Note: no inputs, no outputs - this acts only on global variables.
2018: ## Make sure we have all the input we need:
2019: if (! %Apache::lonplot::plot) { &set_defaults(\%Apache::lonplot::plot,\%gnuplot_defaults); }
2020: if (! %key ) {} # No key for this plot, thats okay
2021: # if (! %axis) { &set_defaults(\%axis,\%axis_defaults); }
2022: if (! defined($title )) {} # No title for this plot, thats okay
2023: if (! defined($xlabel)) {} # No xlabel for this plot, thats okay
2024: if (! defined($ylabel)) {} # No ylabel for this plot, thats okay
2025: if ($#labels < 0) { } # No labels for this plot, thats okay
2026: if ($#curves < 0) {
2027: &Apache::lonxml::warning("No curves specified for plot!!!!");
2028: return '';
2029: }
2030: my $curve;
2031: foreach $curve (@curves) {
2032: if (!defined($curve->{'function'})&&!defined($curve->{'data'})){
2033: &Apache::lonxml::warning("One of the curves specified did not contain any curve data or curve function declarations\n");
2034: return '';
2035: }
2036: }
2037: }
2038:
2039: #------------------------------------------------ make_edit
2040: sub edit_attributes {
2041: my ($target,$token,$defaults,$keys) = @_;
2042: my ($result,@keys);
2043: if ($keys && ref($keys) eq 'ARRAY') {
2044: @keys = @$keys;
2045: } else {
2046: @keys = sort(keys(%$defaults));
2047: }
2048: foreach my $attr (@keys) {
2049: # append a ' ' to the description if it doesn't have one already.
2050: my $description = $defaults->{$attr}->{'description'};
2051: $description .= ' ' if ($description !~ / $/);
2052: if ($defaults->{$attr}->{'edit_type'} eq 'entry') {
2053: $result .= &Apache::edit::text_arg
2054: ($description,$attr,$token,
2055: $defaults->{$attr}->{'size'},
2056: $defaults->{$attr}->{'class'});
2057: } elsif ($defaults->{$attr}->{'edit_type'} eq 'choice') {
2058: $result .= &Apache::edit::select_or_text_arg
2059: ($description,$attr,$defaults->{$attr}->{'choices'},$token);
2060: } elsif ($defaults->{$attr}->{'edit_type'} eq 'onoff') {
2061: $result .= &Apache::edit::select_or_text_arg
2062: ($description,$attr,['on','off'],$token);
2063: }
2064: $result .= '<br />';
2065: }
2066: return $result;
2067: }
2068:
2069:
2070: ###################################################################
2071: ## ##
2072: ## Insertion functions for editing plots ##
2073: ## ##
2074: ###################################################################
2075:
2076: sub insert_gnuplot {
2077: my $result = '';
2078: # plot attributes
2079: $result .= "\n<gnuplot ";
2080: foreach my $attr (keys(%gnuplot_defaults)) {
2081: $result .= "\n $attr=\"$gnuplot_defaults{$attr}->{'default'}\"";
2082: }
2083: $result .= ">";
2084: # Add the components (most are commented out for simplicity)
2085: # $result .= &insert_key();
2086: # $result .= &insert_axis();
2087: # $result .= &insert_title();
2088: # $result .= &insert_xlabel();
2089: # $result .= &insert_ylabel();
2090: $result .= &insert_curve();
2091: # close up the <gnuplot>
2092: $result .= "\n</gnuplot>";
2093: return $result;
2094: }
2095:
2096: sub insert_tics {
2097: my $result;
2098: $result .= &insert_xtics() . &insert_ytics;
2099: return $result;
2100: }
2101:
2102: sub insert_xtics {
2103: my $result;
2104: $result .= "\n <xtics ";
2105: foreach my $attr (keys(%tic_defaults)) {
2106: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
2107: }
2108: $result .= "/>";
2109: return $result;
2110: }
2111:
2112: sub insert_ytics {
2113: my $result;
2114: $result .= "\n <ytics ";
2115: foreach my $attr (keys(%tic_defaults)) {
2116: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
2117: }
2118: $result .= "/>";
2119: return $result;
2120: }
2121:
2122: sub insert_key {
2123: my $result;
2124: $result .= "\n <key ";
2125: foreach my $attr (keys(%key_defaults)) {
2126: $result .= "\n $attr=\"$key_defaults{$attr}->{'default'}\"";
2127: }
2128: $result .= " />";
2129: return $result;
2130: }
2131:
2132: sub insert_axis{
2133: my $result;
2134: $result .= "\n <axis ";
2135: foreach my $attr (keys(%axis_defaults)) {
2136: $result .= "\n $attr=\"$axis_defaults{$attr}->{'default'}\"";
2137: }
2138: $result .= " />";
2139: return $result;
2140: }
2141:
2142: sub insert_title { return "\n <title></title>"; }
2143: sub insert_xlabel { return "\n <xlabel></xlabel>"; }
2144: sub insert_ylabel { return "\n <ylabel></ylabel>"; }
2145:
2146: sub insert_label {
2147: my $result;
2148: $result .= "\n <label ";
2149: foreach my $attr (keys(%label_defaults)) {
2150: $result .= "\n $attr=\"".
2151: $label_defaults{$attr}->{'default'}."\"";
2152: }
2153: $result .= "></label>";
2154: return $result;
2155: }
2156:
2157: sub insert_curve {
2158: my $result;
2159: $result .= "\n <curve ";
2160: foreach my $attr (keys(%curve_defaults)) {
2161: $result .= "\n $attr=\"".
2162: $curve_defaults{$attr}->{'default'}."\"";
2163: }
2164: $result .= " >";
2165: $result .= &insert_data().&insert_data()."\n </curve>";
2166: }
2167:
2168: sub insert_function {
2169: my $result;
2170: $result .= "\n <function></function>";
2171: return $result;
2172: }
2173:
2174: sub insert_data {
2175: my $result;
2176: $result .= "\n <data></data>";
2177: return $result;
2178: }
2179:
2180: ##----------------------------------------------------------------------
2181: 1;
2182: __END__
2183:
2184:
2185: =head1 NAME
2186:
2187: Apache::lonplot.pm
2188:
2189: =head1 SYNOPSIS
2190:
2191: XML-based plotter of graphs
2192:
2193: This is part of the LearningOnline Network with CAPA project
2194: described at http://www.lon-capa.org.
2195:
2196:
2197: =head1 SUBROUTINES (parsing and edit rendering)
2198:
2199: =over
2200:
2201: =item start_gnuplot()
2202:
2203: =item end_gnuplot()
2204:
2205: =item start_xtics()
2206:
2207: =item end_xtics()
2208:
2209: =item start_ytics()
2210:
2211: =item end_ytics()
2212:
2213: =item get_font()
2214:
2215: =item start_key()
2216:
2217: =item end_key()
2218:
2219: =item parse_label()
2220:
2221: =item replace_entities()
2222:
2223: =item start_title()
2224:
2225: =item end_title()
2226:
2227: =item start_xlabel()
2228:
2229: =item end_xlabel()
2230:
2231: =item start_ylabel()
2232:
2233: =item end_label()
2234:
2235: =item start_curve()
2236:
2237: =item end_curve()
2238:
2239: =item start_function()
2240:
2241: =item end_function()
2242:
2243: =item start_data()
2244:
2245: =item end_data()
2246:
2247: =item start_axis()
2248:
2249: =item end_axis
2250:
2251: =back
2252:
2253: =head1 SUBROUTINES (Utility)
2254:
2255: =over
2256:
2257: =item set_defaults()
2258:
2259: =item get_attributes()
2260:
2261: =item write_gnuplot_file()
2262:
2263: =item check_inputs()
2264:
2265: =item edit_attributes()
2266:
2267: =back
2268:
2269: =head1 SUBROUTINES (Insertion functions for editing plots)
2270:
2271: =over
2272:
2273: =item insert_gnuplot()
2274:
2275: =item insert_tics()
2276:
2277: =item insert_xtics()
2278:
2279: =item insert_key()
2280:
2281: =item insert_axis()
2282:
2283: =item insert_title()
2284:
2285: =item insert_xlabel()
2286:
2287: =item insert_ylabel()
2288:
2289: =item insert_label()
2290:
2291: =item insert_curve()
2292:
2293: =item insert_function()
2294:
2295: =item insert_data()
2296:
2297: =back
2298:
2299: =cut
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