1: # The LearningOnline Network with CAPA
2: # Dynamic plot
3: #
4: # $Id: lonplot.pm,v 1.154 2012/02/13 11:24:16 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 =
102: (
103: solid => 1,
104: dashed => 0
105: );
106:
107: my %linestyles =
108: (
109: lines => 2, # Maybe this will be used in the future
110: linespoints => 2, # to check on whether or not they have
111: dots => 2, # supplied enough <data></data> fields
112: points => 2, # to use the given line style. But for
113: steps => 2, # now there are more important things
114: fsteps => 2, # for me to deal with.
115: histeps => 2,
116: errorbars => 3,
117: xerrorbars => [3,4],
118: yerrorbars => [3,4],
119: xyerrorbars => [4,6],
120: boxes => 3,
121: filledcurves => 2,
122: vector => 4
123: );
124:
125: my $int_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^\d+$/};
126: my $real_test =
127: sub {$_[0]=~s/\s+//g;$_[0]=~/^[+-]?\d*\.?\d*([eE][+-]\d+)?$/};
128: my $pos_real_test =
129: sub {$_[0]=~s/\s+//g;$_[0]=~/^[+]?\d*\.?\d*([eE][+-]\d+)?$/};
130: my $color_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^x[\da-fA-F]{6}$/};
131: my $onoff_test = sub {$_[0]=~/^(on|off)$/};
132: my $key_pos_test = sub {$_[0]=~/^(top|bottom|right|left|outside|below| )+$/};
133: my $sml_test = sub {$_[0]=~/^(\d+|small|medium|large)$/};
134: my $linestyle_test = sub {exists($linestyles{$_[0]})};
135: my $words_test = sub {$_[0]=~s/\s+/ /g;$_[0]=~/^([\w~!\@\#\$\%^&\*\(\)-=_\+\[\]\{\}:\;\'<>,\.\/\?\\]+ ?)+$/};
136:
137: ###################################################################
138: ## ##
139: ## Attribute metadata ##
140: ## ##
141: ###################################################################
142: my @gnuplot_edit_order =
143: qw/alttag bgcolor fgcolor height width texwidth fontface font texfont
144: transparent grid samples
145: border align plotcolor plottype gridtype lmargin rmargin
146: tmargin bmargin major_ticscale minor_ticscale boxwidth gridlayer fillstyle
147: pattern solid/;
148:
149: my $margin_choices = ['default',0..20];
150:
151: my %gnuplot_defaults =
152: (
153: alttag => {
154: default => 'dynamically generated plot',
155: test => $words_test,
156: description => 'Brief description of the plot',
157: edit_type => 'entry',
158: size => '40'
159: },
160: height => {
161: default => 300,
162: test => $int_test,
163: description => 'Height of image (pixels)',
164: edit_type => 'entry',
165: size => '10'
166: },
167: width => {
168: default => 400,
169: test => $int_test,
170: description => 'Width of image (pixels)',
171: edit_type => 'entry',
172: size => '10'
173: },
174: bgcolor => {
175: default => 'xffffff',
176: test => $color_test,
177: description => 'Background color of image (xffffff)',
178: edit_type => 'entry',
179: size => '10',
180: class => 'colorchooser'
181: },
182: fgcolor => {
183: default => 'x000000',
184: test => $color_test,
185: description => 'Foreground color of image (x000000)',
186: edit_type => 'entry',
187: size => '10',
188: class => 'colorchooser'
189: },
190: transparent => {
191: default => 'off',
192: test => $onoff_test,
193: description => 'Transparent image',
194: edit_type => 'onoff'
195: },
196: grid => {
197: default => 'on',
198: test => $onoff_test,
199: description => 'Display grid',
200: edit_type => 'onoff'
201: },
202: gridlayer => {
203: default => 'off',
204: test => $onoff_test,
205: description => 'Display grid front layer over filled boxes or filled curves',
206: edit_type => 'onoff'
207: },
208: box_border => {
209: default => 'noborder',
210: test => sub {$_[0]=~/^(noborder|border)$/},
211: description => 'Draw border for boxes',
212: edit_type => 'choice',
213: choices => ['border','noborder']
214: },
215: border => {
216: default => 'on',
217: test => $onoff_test,
218: description => 'Draw border around plot',
219: edit_type => 'onoff'
220: },
221: font => {
222: default => '9',
223: test => $sml_test,
224: description => 'Font size to use in web output (pts)',
225: edit_type => 'choice',
226: choices => [['5','5 (small)'],'6','7','8',['9','9 (medium)'],'10',['11','11 (large)'],'12','15']
227: },
228: fontface => {
229: default => 'sans-serif',
230: test => sub {$_[0]=~/^(sans-serif|serif|classic)$/},
231: description => 'Type of font to use',
232: edit_type => 'choice',
233: choices => ['sans-serif','serif', 'classic']
234: },
235: samples => {
236: default => '100',
237: test => $int_test,
238: description => 'Number of samples for non-data plots',
239: edit_type => 'choice',
240: choices => ['100','200','500','1000','2000','5000']
241: },
242: align => {
243: default => 'middle',
244: test => sub {$_[0]=~/^(left|right|middle|center)$/},
245: description => 'Alignment for image in HTML',
246: edit_type => 'choice',
247: choices => ['left','right','middle']
248: },
249: texwidth => {
250: default => '93',
251: test => $int_test,
252: description => 'Width of plot when printed (mm)',
253: edit_type => 'entry',
254: size => '5'
255: },
256: texfont => {
257: default => '22',
258: test => $int_test,
259: description => 'Font size to use in TeX output (pts):',
260: edit_type => 'choice',
261: choices => [qw/8 10 12 14 16 18 20 22 24 26 28 30 32 34 36/],
262: },
263: plotcolor => {
264: default => 'monochrome',
265: test => sub {$_[0]=~/^(monochrome|color|colour)$/},
266: description => 'Color setting for printing:',
267: edit_type => 'choice',
268: choices => [qw/monochrome color colour/],
269: },
270: pattern => {
271: default => '',
272: test => $int_test,
273: description => 'Pattern value for boxes:',
274: edit_type => 'choice',
275: choices => [0,1,2,3,4,5,6]
276: },
277: solid => {
278: default => 0,
279: test => $real_test,
280: description => 'The density of fill style for boxes',
281: edit_type => 'entry',
282: size => '5'
283: },
284: fillstyle => {
285: default => 'empty',
286: test => sub {$_[0]=~/^(empty|solid|pattern)$/},
287: description => 'Filled style for boxes:',
288: edit_type => 'choice',
289: choices => ['empty','solid','pattern']
290: },
291: plottype => {
292: default => 'Cartesian',
293: test => sub {$_[0]=~/^(Polar|Cartesian)$/},
294: description => 'Plot type:',
295: edit_type => 'choice',
296: choices => ['Cartesian','Polar']
297: },
298: gridtype => {
299: default => 'Cartesian',
300: test => sub {$_[0]=~/^(Polar|Cartesian|Linear-Log|Log-Linear|Log-Log)$/},
301: description => 'Grid type:',
302: edit_type => 'choice',
303: choices => ['Cartesian','Polar','Linear-Log','Log-Linear','Log-Log']
304: },
305: lmargin => {
306: default => 'default',
307: test => sub {$_[0]=~/^(default|\d+)$/},
308: description => 'Left margin width (pts):',
309: edit_type => 'choice',
310: choices => $margin_choices,
311: },
312: rmargin => {
313: default => 'default',
314: test => sub {$_[0]=~/^(default|\d+)$/},
315: description => 'Right margin width (pts):',
316: edit_type => 'choice',
317: choices => $margin_choices,
318: },
319: tmargin => {
320: default => 'default',
321: test => sub {$_[0]=~/^(default|\d+)$/},
322: description => 'Top margin width (pts):',
323: edit_type => 'choice',
324: choices => $margin_choices,
325: },
326: bmargin => {
327: default => 'default',
328: test => sub {$_[0]=~/^(default|\d+)$/},
329: description => 'Bottom margin width (pts):',
330: edit_type => 'choice',
331: choices => $margin_choices,
332: },
333: boxwidth => {
334: default => '',
335: test => $real_test,
336: description => 'Width of boxes, default is auto',
337: edit_type => 'entry',
338: size => '5'
339: },
340: major_ticscale => {
341: default => '1',
342: test => $real_test,
343: description => 'Size of major tic marks (plot coordinates)',
344: edit_type => 'entry',
345: size => '5'
346: },
347: minor_ticscale => {
348: default => '0.5',
349: test => $real_test,
350: description => 'Size of minor tic mark (plot coordinates)',
351: edit_type => 'entry',
352: size => '5'
353: },
354: );
355:
356: my %key_defaults =
357: (
358: title => {
359: default => '',
360: test => $words_test,
361: description => 'Title of key',
362: edit_type => 'entry',
363: size => '40'
364: },
365: box => {
366: default => 'off',
367: test => $onoff_test,
368: description => 'Draw a box around the key?',
369: edit_type => 'onoff'
370: },
371: pos => {
372: default => 'top right',
373: test => $key_pos_test,
374: description => 'Position of the key on the plot',
375: edit_type => 'choice',
376: choices => ['top left','top right','bottom left','bottom right',
377: 'outside','below']
378: }
379: );
380:
381: my %label_defaults =
382: (
383: xpos => {
384: default => 0,
385: test => $real_test,
386: description => 'X position of label (graph coordinates)',
387: edit_type => 'entry',
388: size => '10'
389: },
390: ypos => {
391: default => 0,
392: test => $real_test,
393: description => 'Y position of label (graph coordinates)',
394: edit_type => 'entry',
395: size => '10'
396: },
397: justify => {
398: default => 'left',
399: test => sub {$_[0]=~/^(left|right|center)$/},
400: description => 'justification of the label text on the plot',
401: edit_type => 'choice',
402: choices => ['left','right','center']
403: },
404: rotate => {
405: default => 0,
406: test => $real_test,
407: description => 'Rotation of label (degrees)',
408: edit_type => 'entry',
409: size => '10',
410: }
411: );
412:
413: my @tic_edit_order = ('location','mirror','start','increment','end',
414: 'minorfreq');
415: my %tic_defaults =
416: (
417: location => {
418: default => 'border',
419: test => sub {$_[0]=~/^(border|axis)$/},
420: description => 'Location of major tic marks',
421: edit_type => 'choice',
422: choices => ['border','axis']
423: },
424: mirror => {
425: default => 'on',
426: test => $onoff_test,
427: description => 'Mirror tics on opposite axis?',
428: edit_type => 'onoff'
429: },
430: start => {
431: default => '-10.0',
432: test => $real_test,
433: description => 'Start major tics at',
434: edit_type => 'entry',
435: size => '10'
436: },
437: increment => {
438: default => '1.0',
439: test => $real_test,
440: description => 'Place a major tic every',
441: edit_type => 'entry',
442: size => '10'
443: },
444: end => {
445: default => ' 10.0',
446: test => $real_test,
447: description => 'Stop major tics at ',
448: edit_type => 'entry',
449: size => '10'
450: },
451: minorfreq => {
452: default => '0',
453: test => $int_test,
454: description => 'Number of minor tics per major tic mark',
455: edit_type => 'entry',
456: size => '10'
457: },
458: );
459:
460: my @axis_edit_order = ('color','xmin','xmax','ymin','ymax','xformat', 'yformat', 'xzero', 'yzero');
461: my %axis_defaults =
462: (
463: color => {
464: default => 'x000000',
465: test => $color_test,
466: description => 'Color of grid lines (x000000)',
467: edit_type => 'entry',
468: size => '10',
469: class => 'colorchooser'
470: },
471: xmin => {
472: default => '-10.0',
473: test => $real_test,
474: description => 'Minimum x-value shown in plot',
475: edit_type => 'entry',
476: size => '10'
477: },
478: xmax => {
479: default => ' 10.0',
480: test => $real_test,
481: description => 'Maximum x-value shown in plot',
482: edit_type => 'entry',
483: size => '10'
484: },
485: ymin => {
486: default => '-10.0',
487: test => $real_test,
488: description => 'Minimum y-value shown in plot',
489: edit_type => 'entry',
490: size => '10'
491: },
492: ymax => {
493: default => ' 10.0',
494: test => $real_test,
495: description => 'Maximum y-value shown in plot',
496: edit_type => 'entry',
497: size => '10'
498: },
499: xformat => {
500: default => 'on',
501: test => sub {$_[0]=~/^(on|off|\d+(f|F|e|E))$/},
502: description => 'X-axis number formatting',
503: edit_type => 'choice',
504: choices => ['on', 'off', '2e', '2f'],
505: },
506: yformat => {
507: default => 'on',
508: test => sub {$_[0]=~/^(on|off|\d+(f|F|e|E))$/},
509: description => 'Y-axis number formatting',
510: edit_type => 'choice',
511: choices => ['on', 'off', '2e', '2f'],
512: },
513:
514: xzero => {
515: default => 'off',
516: test => sub {$_[0]=~/^(off|line|thick-line|dotted)$/},
517: description => 'Show x-zero (y=0) axis',
518: edit_type => 'choice',
519: choices => ['off', 'line', 'thick-line', 'dotted'],
520: },
521:
522: yzero => {
523: default => 'off',
524: test => sub {$_[0]=~/^(off|line|thick-line|dotted)$/},
525: description => 'Show y-zero (x=0) axis',
526: edit_type => 'choice',
527: choices => ['off', 'line', 'thick-line', 'dotted'],
528: },
529: );
530:
531: my @curve_edit_order = ('color','name','linestyle','linewidth','linetype','pointtype','pointsize','limit');
532:
533: my %curve_defaults =
534: (
535: color => {
536: default => 'x000000',
537: test => $color_test,
538: description => 'Color of curve (x000000)',
539: edit_type => 'entry',
540: size => '10',
541: class => 'colorchooser'
542: },
543: name => {
544: default => '',
545: test => $words_test,
546: description => 'Name of curve to appear in key',
547: edit_type => 'entry',
548: size => '20'
549: },
550: linestyle => {
551: default => 'lines',
552: test => $linestyle_test,
553: description => 'Plot with:',
554: edit_type => 'choice',
555: choices => [keys(%linestyles)]
556: },
557: linewidth => {
558: default => 1,
559: test => $int_test,
560: description => 'Line width (may not apply to all plot styles)',
561: edit_type => 'choice',
562: choices => [1,2,3,4,5,6,7,8,9,10]
563: },
564: linetype => {
565: default => 'solid',
566: test => sub {$_[0]=~/^(solid|dashed)$/},
567: description => 'Line type (may not apply to all plot styles)',
568: edit_type => 'choice',
569: choices => ['solid', 'dashed']
570: },
571: pointsize => {
572: default => 1,
573: test => $pos_real_test,
574: description => 'Point size (may not apply to all plot styles)',
575: edit_type => 'entry',
576: size => '5'
577: },
578: pointtype => {
579: default => 1,
580: test => $int_test,
581: description => 'Point type (may not apply to all plot styles)',
582: edit_type => 'choice',
583: choices => [0,1,2,3,4,5,6]
584: },
585: limit => {
586: default => 'closed',
587: test => sub {$_[0]=~/^(above|below|closed|x1|x2|y1|y2)$/},
588: description => 'Point to fill -- for filledcurves',
589: edit_type => 'choice',
590: choices => ['above', 'below', 'closed','x1','x2','y1','y2']
591: },
592: );
593:
594: ###################################################################
595: ## ##
596: ## parsing and edit rendering ##
597: ## ##
598: ###################################################################
599:
600: undef %Apache::lonplot::plot;
601: my (%key,%axis,$title,$xlabel,$ylabel,@labels,@curves,%xtics,%ytics);
602:
603: sub start_gnuplot {
604: undef(%Apache::lonplot::plot); undef(%key); undef(%axis);
605: undef($title); undef($xlabel); undef($ylabel);
606: undef(@labels); undef(@curves);
607: undef(%xtics); undef(%ytics);
608: #
609: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
610: my $result='';
611: &Apache::lonxml::register('Apache::lonplot',
612: ('title','xlabel','ylabel','key','axis','label','curve',
613: 'xtics','ytics'));
614: push (@Apache::lonxml::namespace,'lonplot');
615: if ($target eq 'web' || $target eq 'tex') {
616: &get_attributes(\%Apache::lonplot::plot,\%gnuplot_defaults,$parstack,$safeeval,
617: $tagstack->[-1]);
618: } elsif ($target eq 'edit') {
619: $result .= &Apache::edit::tag_start($target,$token,'GnuPlot');
620: $result .= &edit_attributes($target,$token,\%gnuplot_defaults,
621: \@gnuplot_edit_order)
622: .&Apache::edit::end_row()
623: .&Apache::edit::start_spanning_row();
624: } elsif ($target eq 'modified') {
625: my $constructtag=&Apache::edit::get_new_args
626: ($token,$parstack,$safeeval,keys(%gnuplot_defaults));
627: if ($constructtag) {
628: $result = &Apache::edit::rebuild_tag($token);
629: }
630: }
631: return $result;
632: }
633:
634: sub end_gnuplot {
635: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
636: pop @Apache::lonxml::namespace;
637: &Apache::lonxml::deregister('Apache::lonplot',
638: ('title','xlabel','ylabel','key','axis','label','curve'));
639: my $result = '';
640: my $randnumber;
641: my $tmpdir =LONCAPA::tempdir(); # Where temporary files live:
642:
643: # need to call rand everytime start_script would evaluate, as the
644: # safe space rand number generator and the global rand generator
645: # are not separate
646: if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
647: $target eq 'answer') {
648: $randnumber=int(rand(1000));
649: }
650: if ($target eq 'web' || $target eq 'tex') {
651: &check_inputs(); # Make sure we have all the data we need
652: ##
653: ## Determine filename
654: my $filename = $env{'user.name'}.'_'.$env{'user.domain'}.
655: '_'.time.'_'.$$.$randnumber.'_plot';
656: ## Write the plot description to the file
657: &write_gnuplot_file($tmpdir,$filename,$target);
658: $filename = &escape($filename);
659: ## return image tag for the plot
660: if ($target eq 'web') {
661: $result .= <<"ENDIMAGE";
662: <img src = "/cgi-bin/plot.$weboutputformat?file=$filename.data"
663: width = "$Apache::lonplot::plot{'width'}"
664: height = "$Apache::lonplot::plot{'height'}"
665: align = "$Apache::lonplot::plot{'align'}"
666: alt = "$Apache::lonplot::plot{'alttag'}" />
667: ENDIMAGE
668: } elsif ($target eq 'tex') {
669: &Apache::lonxml::debug(" gnuplot wid = $Apache::lonplot::plot{'width'}");
670: &Apache::lonxml::debug(" gnuplot ht = $Apache::lonplot::plot{'height'}");
671: #might be inside the safe space, register the URL for later
672: &Apache::lonxml::register_ssi("/cgi-bin/plot.gif?file=$filename.data&output=eps");
673: $result = "%DYNAMICIMAGE:$Apache::lonplot::plot{'width'}:$Apache::lonplot::plot{'height'}:$Apache::lonplot::plot{'texwidth'}\n";
674: $result .= '\graphicspath{{'.$tmpdir.'}}'."\n";
675: $result .= '\includegraphics[width='.$Apache::lonplot::plot{'texwidth'}.' mm]{'.&unescape($filename).'.eps}';
676: }
677: } elsif ($target eq 'edit') {
678: $result.=&Apache::edit::tag_end($target,$token);
679: }
680: return $result;
681: }
682:
683:
684: ##--------------------------------------------------------------- xtics
685: sub start_xtics {
686: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
687: my $result='';
688: if ($target eq 'web' || $target eq 'tex') {
689: &get_attributes(\%xtics,\%tic_defaults,$parstack,$safeeval,
690: $tagstack->[-1]);
691: } elsif ($target eq 'edit') {
692: $result .= &Apache::edit::tag_start($target,$token,'xtics');
693: $result .= &edit_attributes($target,$token,\%tic_defaults,
694: \@tic_edit_order);
695: } elsif ($target eq 'modified') {
696: my $constructtag=&Apache::edit::get_new_args
697: ($token,$parstack,$safeeval,keys(%tic_defaults));
698: if ($constructtag) {
699: $result = &Apache::edit::rebuild_tag($token);
700: }
701: }
702: return $result;
703: }
704:
705: sub end_xtics {
706: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
707: my $result = '';
708: if ($target eq 'web' || $target eq 'tex') {
709: } elsif ($target eq 'edit') {
710: $result.=&Apache::edit::tag_end($target,$token);
711: }
712: return $result;
713: }
714:
715: ##--------------------------------------------------------------- ytics
716: sub start_ytics {
717: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
718: my $result='';
719: if ($target eq 'web' || $target eq 'tex') {
720: &get_attributes(\%ytics,\%tic_defaults,$parstack,$safeeval,
721: $tagstack->[-1]);
722: } elsif ($target eq 'edit') {
723: $result .= &Apache::edit::tag_start($target,$token,'ytics');
724: $result .= &edit_attributes($target,$token,\%tic_defaults,
725: \@tic_edit_order);
726: } elsif ($target eq 'modified') {
727: my $constructtag=&Apache::edit::get_new_args
728: ($token,$parstack,$safeeval,keys(%tic_defaults));
729: if ($constructtag) {
730: $result = &Apache::edit::rebuild_tag($token);
731: }
732: }
733: return $result;
734: }
735:
736: sub end_ytics {
737: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
738: my $result = '';
739: if ($target eq 'web' || $target eq 'tex') {
740: } elsif ($target eq 'edit') {
741: $result.=&Apache::edit::tag_end($target,$token);
742: }
743: return $result;
744: }
745:
746: ##-----------------------------------------------------------------font
747: my %font_properties =
748: (
749: 'classic' => {
750: face => 'classic',
751: file => 'DejaVuSansMono-Bold',
752: printname => 'Helvetica',
753: tex_no_file => 1,
754: },
755: 'sans-serif' => {
756: face => 'sans-serif',
757: file => 'DejaVuSans',
758: printname => 'DejaVuSans',
759: },
760: 'serif' => {
761: face => 'serif',
762: file => 'DejaVuSerif',
763: printname => 'DejaVuSerif',
764: },
765: );
766:
767: sub get_font {
768: my ($target) = @_;
769: my ($size, $selected_font);
770:
771: if ( $Apache::lonplot::plot{'font'} =~ /^(small|medium|large)/) {
772: $selected_font = $font_properties{'classic'};
773: if ( $Apache::lonplot::plot{'font'} eq 'small') {
774: $size = '5';
775: } elsif ( $Apache::lonplot::plot{'font'} eq 'medium') {
776: $size = '9';
777: } elsif ( $Apache::lonplot::plot{'font'} eq 'large') {
778: $size = '11';
779: } else {
780: $size = '9';
781: }
782: } else {
783: $size = $Apache::lonplot::plot{'font'};
784: $selected_font = $font_properties{$Apache::lonplot::plot{'fontface'}};
785: }
786: if ($target eq 'tex' && defined($Apache::lonplot::plot{'texfont'})) {
787: # $selected_font = $font_properties{'classic'};
788: $size = $Apache::lonplot::plot{'texfont'};
789: }
790: return ($size, $selected_font);
791: }
792:
793: ##----------------------------------------------------------------- key
794: sub start_key {
795: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
796: my $result='';
797: if ($target eq 'web' || $target eq 'tex') {
798: &get_attributes(\%key,\%key_defaults,$parstack,$safeeval,
799: $tagstack->[-1]);
800: } elsif ($target eq 'edit') {
801: $result .= &Apache::edit::tag_start($target,$token,'Plot Key');
802: $result .= &edit_attributes($target,$token,\%key_defaults);
803: } elsif ($target eq 'modified') {
804: my $constructtag=&Apache::edit::get_new_args
805: ($token,$parstack,$safeeval,keys(%key_defaults));
806: if ($constructtag) {
807: $result = &Apache::edit::rebuild_tag($token);
808: }
809: }
810: return $result;
811: }
812:
813: sub end_key {
814: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
815: my $result = '';
816: if ($target eq 'web' || $target eq 'tex') {
817: } elsif ($target eq 'edit') {
818: $result.=&Apache::edit::tag_end($target,$token);
819: }
820: return $result;
821: }
822:
823: sub parse_label {
824: my ($target,$text) = @_;
825: my $parser=HTML::LCParser->new(\$text);
826: my $result;
827: while (my $token=$parser->get_token) {
828: if ($token->[0] eq 'S') {
829: if ($token->[1] eq 'sub') {
830: $result .= '_{';
831: } elsif ($token->[1] eq 'sup') {
832: $result .= '^{';
833: } else {
834: $result .= $token->[4];
835: }
836: } elsif ($token->[0] eq 'E') {
837: if ($token->[1] eq 'sub'
838: || $token->[1] eq 'sup') {
839: $result .= '}';
840: } else {
841: $result .= $token->[2];
842: }
843: } elsif ($token->[0] eq 'T') {
844: $result .= &replace_entities($target,$token->[1]);
845: }
846: }
847: return $result;
848: }
849:
850: #
851: # Note that there are severe restrictions on font selection in the
852: # ps driver now. later in life Gnuplot is supposed to support
853: # utf-8 fonts in the posts script driver. When this happens,
854: # the tex entries with comments that include the word <FIX>
855: # should be changed to print the correct glyphs rather than some
856: # approximation or fallback of what is intended.
857:
858: my %lookup =
859: ( # Greek alphabet:
860:
861: '(Alpha|#913)' => {'tex' => '{/Symbol A}', 'web' => "\x{391}"},
862: '(Beta|#914)' => {'tex' => '{/Symbol B}', 'web' => "\x{392}"},
863: '(Chi|#935)' => {'tex' => '{/Symbol C}', 'web' => "\x{3A7}"},
864: '(Delta|#916)' => {'tex' => '{/Symbol D}', 'web' => "\x{394}"},
865: '(Epsilon|#917)' => {'tex' => '{/Symbol E}', 'web' => "\x{395}"},
866: '(Phi|#934)' => {'tex' => '{/Symbol F}', 'web' => "\x{3A6}"},
867: '(Gamma|#915)' => {'tex' => '{/Symbol G}', 'web' => "\x{393}"},
868: '(Eta|#919)' => {'tex' => '{/Symbol H}', 'web' => "\x{397}"},
869: '(Iota|#921)' => {'tex' => '{/Symbol I}', 'web' => "\x{399}"},
870: '(Kappa|#922)' => {'tex' => '{/Symbol K}', 'web' => "\x{39A}"},
871: '(Lambda|#923)' => {'tex' => '{/Symbol L}', 'web' => "\x{39B}"},
872: '(Mu|#924)' => {'tex' => '{/Symbol M}', 'web' => "\x{39C}"},
873: '(Nu|#925)' => {'tex' => '{/Symbol N}', 'web' => "\x{39D}"},
874: '(Omicron|#927)' => {'tex' => '{/Symbol O}', 'web' => "\x{39F}"},
875: '(Pi|#928)' => {'tex' => '{/Symbol P}', 'web' => "\x{3A0}"},
876: '(Theta|#920)' => {'tex' => '{/Symbol Q}', 'web' => "\x{398}"},
877: '(Rho|#929)' => {'tex' => '{/Symbol R}', 'web' => "\x{3A1}"},
878: '(Sigma|#931)' => {'tex' => '{/Symbol S}', 'web' => "\x{3A3}"},
879: '(Tau|#932)' => {'tex' => '{/Symbol T}', 'web' => "\x{3A4}"},
880: '(Upsilon|#933)' => {'tex' => '{/Symbol U}', 'web' => "\x{3A5}"},
881: '(Omega|#937)' => {'tex' => '{/Symbol W}', 'web' => "\x{3A9}"},
882: '(Xi|#926)' => {'tex' => '{/Symbol X}', 'web' => "\x{39E}"},
883: '(Psi|#936)' => {'tex' => '{/Symbol Y}', 'web' => "\x{3A8}"},
884: '(Zeta|#918)' => {'tex' => '{/Symbol Z}', 'web' => "\x{396}"},
885: '(alpha|#945)' => {'tex' => '{/Symbol a}', 'web' => "\x{3B1}"},
886: '(beta|#946)' => {'tex' => '{/Symbol b}', 'web' => "\x{3B2}"},
887: '(chi|#967)' => {'tex' => '{/Symbol c}', 'web' => "\x{3C7}"},
888: '(delta|#948)' => {'tex' => '{/Symbol d}', 'web' => "\x{3B4}"},
889: '(epsilon|#949)' => {'tex' => '{/Symbol e}', 'web' => "\x{3B5}"},
890: '(phi|#966)' => {'tex' => '{/Symbol f}', 'web' => "\x{3C6}"},
891: '(gamma|#947)' => {'tex' => '{/Symbol g}', 'web' => "\x{3B3}"},
892: '(eta|#951)' => {'tex' => '{/Symbol h}', 'web' => "\x{3B7}"},
893: '(iota|#953)' => {'tex' => '{/Symbol i}', 'web' => "\x{3B9}"},
894: '(kappa|#954)' => {'tex' => '{/Symbol k}', 'web' => "\x{3BA}"},
895: '(lambda|#955)' => {'tex' => '{/Symbol k}', 'web' => "\x{3BB}"},
896: '(mu|#956)' => {'tex' => '{/Symbol m}', 'web' => "\x{3BC}"},
897: '(nu|#957)' => {'tex' => '{/Symbol n}', 'web' => "\x{3BD}"},
898: '(omicron|#959)' => {'tex' => '{/Symbol o}', 'web' => "\x{3BF}"},
899: '(pi|#960)' => {'tex' => '{/Symbol p}', 'web' => "\x{3C0}"},
900: '(theta|#952)' => {'tex' => '{/Symbol q}', 'web' => "\x{3B8}"},
901: '(rho|#961)' => {'tex' => '{/Symbol r}', 'web' => "\x{3C1}"},
902: '(sigma|#963)' => {'tex' => '{/Symbol s}', 'web' => "\x{3C3}"},
903: '(tau|#964)' => {'tex' => '{/Symbol t}', 'web' => "\x{3C4}"},
904: '(upsilon|#965)' => {'tex' => '{/Symbol u}', 'web' => "\x{3C5}"},
905: '(omega|#969)' => {'tex' => '{/Symbol w}', 'web' => "\x{3C9}"},
906: '(xi|#958)' => {'tex' => '{/Symbol x}', 'web' => "\x{3BE}"},
907: '(psi|#968)' => {'tex' => '{/Symbol y}', 'web' => "\x{3C8}"},
908: '(zeta|#950)' => {'tex' => '{/Symbol z}', 'web' => "\x{3B6}"},
909: '(thetasym|#977)' => {'tex' => '{/Symbol \165}', 'web' => "\x{3d1}"},
910: '(upsih|#978)' => {'tex' => '{/Symbol \241}', 'web' => "\x{3d2}"},
911: '(piv|#982)' => {'tex' => '{/Symbol \166}', 'web' => "\x{3d6}"},
912:
913:
914: # Punctuation:
915:
916: '(quot|#034)' => {'tex' => '\42', 'web' => '\42'},
917: '(amp|#038)' => {'tex' => '\46', 'web' => '\46'},
918: '(lt|#060)' => {'tex' => '\74', 'web' => '\74'},
919: '(gt|#062)' => {'tex' => '\76', 'web' => '\76'},
920: '#131' => {'tex' => '{/Symbol \246}', 'web' => "\x{192}"},
921: '#132' => {'tex' => '{/Text \271}', 'web' => "\x{201e}"},
922: '#133' => {'tex' => '{/Symbol \274}', 'web'=> "\x{2026}"},
923: '#134' => {'tex' => '{/Text \262}', 'web' => "\x{2020}"},
924: '#135' => {'tex' => '{/Text \263}', 'web' => "\x{2021}"},
925: '#136' => {'tex' => '\\\\^', 'web' => '\\\\^'},
926: '#137' => {'tex' => '%o', 'web' => "\x{2030}"}, # Per Mille <FIX>
927: '#138' => {'tex' => 'S', 'web' => "\x{160}"}, # S-Caron <FIX>
928: '#139' => {'tex' => '<', 'web' => '<'},
929: '#140' => {'tex' => 'AE', 'web' => "\x{152}"}, # AE ligature <FIX>
930: '#145' => {'tex' => '\140', 'web' => "\x{2018}"},
931: '#146' => {'tex' => '\47', 'web' => "\x{2019}"},
932: '#147' => {'tex' => '\140\140', 'web' => "\x{201c}"}, # Left " <FIX>
933: '#148' => {'tex' => '\47\47', 'web' => '\\"'}, # Right " <FIX>
934: '#149' => {'tex' => '{/Symbol \267}', 'web' => "\x{2022}"},
935: '#150' => {'tex' => '{/Text \55}', 'web' => "\x{2013}"}, # en dash
936: '#151' => {'tex' => '{/Symbol \55}', 'web' => "\x{2014}"}, # em dash
937: '#152' => {'tex' => '\\\\~', 'web' => '\\\\~'},
938: '#153' => {'tex' => '{/Symbol \324}', 'web' => "\x{2122}"}, # trademark
939:
940: # Accented letters, and other furreign language glyphs.
941:
942: '#154' => {'tex' => 's', 'web' => "\x{161}"}, # small s-caron no ps.
943: '#155' => {'tex' => '>', 'web' => '\76'}, # >
944: '#156' => {'tex' => '{/Text \366}', 'web' => "\x{153}"}, # oe ligature.<FIX>
945: '#159', => {'tex' => 'Y', 'web' => "\x{178}"}, # Y-umlaut - can't print <FIX>
946: '(nbsp|#160)' => {'tex' => ' ', 'web' => ' '}, # non breaking space.
947: '(iexcl|#161)' => {'tex' => '{/Text \241}', 'web' => "\x{a1}"}, # inverted !
948: '(cent|#162)' => {'tex' => '{/Text \242}', 'web' => "\x{a2}"}, # Cent currency.
949: '(pound|#163)' => {'tex' => '{/Text \243}', 'web' => "\x{a3}"}, # GB Pound currency.
950: '(curren|#164)' => {'tex' => '{/ZapfDingbats \161}','web' => "\x{a4}"}, # Generic currency symb. <FIX>
951: '(yen|#165)' => {'tex' => '{/Text \245}', 'web' => "\x{a5}"}, # Yen currency.
952: '(brvbar|#166)' => {'tex' => '{/Symbol \174}', 'web' => "\x{a6}"}, # Broken vert bar no print.
953: '(sect|#167)' => {'tex' => '{\247}', 'web' => "\x{a7}"}, # Section symbol.
954: '(uml|#168)' => {'tex' => '{\250}', 'web' => "\x{a8}"}, # 'naked' umlaut.
955: '(copy|#169)' => {'tex' => '{/Symbol \343}', 'web' => "\x{a9}"}, # Copyright symbol.
956: '(ordf|#170)' => {'tex' => '{/Text \343}', 'web' => "\x{aa}"}, # Feminine ordinal.
957: '(laquo|#171)' => {'tex' => '{/Text \253}', 'web' => "\x{ab}"}, # << quotes.
958: '(not|#172)' => {'tex' => '\254', 'web' => "\x{ac}"}, # Logical not.
959: '(shy|#173)' => {'tex' => '\255', 'web' => "\x{ad}"}, # soft hyphen.
960: '(reg|#174)' => {'tex' => '{/Symbol \342}', 'web' => "\x{ae}"}, # Registered tm.
961: '(macr|#175)' => {'tex' => '^{\255}', 'web' => "\x{af}"}, # 'naked' macron (overbar).
962: '(deg|#176)' => {'tex' => '{/Text \260}', 'web' => "\x{b0}"}, # Degree symbo..`
963: '(plusmn|#177)' => {'tex' => '{/Symbol \261}', 'web' => "\x{b1}"}, # +/- symbol.
964: '(sup2|#178)' => {'tex' => '^2', 'web' => "\x{b2}"}, # Superscript 2.
965: '(sup3|#179)' => {'tex' => '^3', 'web' => "\x{b3}"}, # Superscript 3.
966: '(acute|#180)' => {'tex' => '{/Text \222}', 'web' => "\x{b4}"}, # 'naked' acute accent.
967: '(micro|#181)' => {'tex' => '{/Symbol \155}', 'web' => "\x{b5}"}, # Micro (small mu).
968: '(para|#182)' => {'tex' => '{/Text \266}', 'web' => "\x{b6}"}, # Paragraph symbol.
969: '(middot|#183)' => {'tex' => '\267', 'web' => "\x{b7}"}, # middle dot
970: '(cedil|#184)' => {'tex' => '\233', 'web' => "\x{b8}"}, # 'naked' cedilla.
971: '(sup1|#185)' => {'tex' => '^1', 'web' => "\x{b9}"}, # superscript 1.
972: '(ordm|#186)' => {'tex' => '{\260}', 'web' => "\x{ba}"}, # masculine ordinal.
973: '(raquo|#187)', => {'tex' => '\273', 'web' => "\x{bb}"}, # Right angle quotes.
974: '(frac14|#188)' => {'tex' => '\274', 'web' => "\x{bc}"}, # 1/4.
975: '(frac12|#189)' => {'tex' => '\275', 'web' => "\x{bd}"}, # 1/2.
976: '(frac34|#190)' => {'tex' => '\276', 'web' => "\x{be}"}, # 3/4
977: '(iquest|#191)' => {'tex' => '{/Text \277}', 'web' => "\x{bf}"}, # Inverted ?
978: '(Agrave|#192)' => {'tex' => '\300', 'web' => "\x{c0}"}, # A Grave.
979: '(Aacute|#193)' => {'tex' => '\301', 'web' => "\x{c1}"}, # A Acute.
980: '(Acirc|#194)' => {'tex' => '\302', 'web' => "\x{c2}"}, # A Circumflex.
981: '(Atilde|#195)' => {'tex' => '\303', 'web' => "\x{c3}"}, # A tilde.
982: '(Auml|#196)' => {'tex' => '\304', 'web' => "\x{c4}"}, # A umlaut.
983: '(Aring|#197)' => {'tex' => '\305', 'web' => "\x{c5}"}, # A ring.
984: '(AElig|#198)' => {'tex' => '\306', 'web' => "\x{c6}"}, # AE ligature.
985: '(Ccedil|#199)' => {'tex' => '\307', 'web' => "\x{c7}"}, # C cedilla
986: '(Egrave|#200)' => {'tex' => '\310', 'web' => "\x{c8}"}, # E Accent grave.
987: '(Eacute|#201)' => {'tex' => '\311', 'web' => "\x{c9}"}, # E acute accent.
988: '(Ecirc|#202)' => {'tex' => '\312', 'web' => "\x{ca}"}, # E Circumflex.
989: '(Euml|#203)' => {'tex' => '\313', 'web' => "\x{cb}"}, # E umlaut.
990: '(Igrave|#204)' => {'tex' => '\314', 'web' => "\x{cc}"}, # I grave accent.
991: '(Iacute|#205)' => {'tex' => '\315', 'web' => "\x{cd}"}, # I acute accent.
992: '(Icirc|#206)' => {'tex' => '\316', 'web' => "\x{ce}"}, # I circumflex.
993: '(Iuml|#207)' => {'tex' => '\317', 'web' => "\x{cf}"}, # I umlaut.
994: '(ETH|#208)' => {'tex' => '\320', 'web' => "\x{d0}"}, # Icelandic Cap eth.
995: '(Ntilde|#209)' => {'tex' => '\321', 'web' => "\x{d1}"}, # Ntilde (enyan).
996: '(Ograve|#210)' => {'tex' => '\322', 'web' => "\x{d2}"}, # O accent grave.
997: '(Oacute|#211)' => {'tex' => '\323', 'web' => "\x{d3}"}, # O accent acute.
998: '(Ocirc|#212)' => {'tex' => '\324', 'web' => "\x{d4}"}, # O circumflex.
999: '(Otilde|#213)' => {'tex' => '\325', 'web' => "\x{d5}"}, # O tilde.
1000: '(Ouml|#214)' => {'tex' => '\326', 'web' => "\x{d6}"}, # O umlaut.
1001: '(times|#215)' => {'tex' => '\327', 'web' => "\x{d7}"}, # Times symbol.
1002: '(Oslash|#216)' => {'tex' => '\330', 'web' => "\x{d8}"}, # O slash.
1003: '(Ugrave|#217)' => {'tex' => '\331', 'web' => "\x{d9}"}, # U accent grave.
1004: '(Uacute|#218)' => {'tex' => '\332', 'web' => "\x{da}"}, # U accent acute.
1005: '(Ucirc|#219)' => {'tex' => '\333', 'web' => "\x{db}"}, # U circumflex.
1006: '(Uuml|#220)' => {'tex' => '\334', 'web' => "\x{dc}"}, # U umlaut.
1007: '(Yacute|#221)' => {'tex' => '\335', 'web' => "\x{dd}"}, # Y accent acute.
1008: '(THORN|#222)' => {'tex' => '\336', 'web' => "\x{de}"}, # Icelandic thorn.
1009: '(szlig|#223)' => {'tex' => '\337', 'web' => "\x{df}"}, # German sharfes s.
1010: '(agrave|#224)' => {'tex' => '\340', 'web' => "\x{e0}"}, # a accent grave.
1011: '(aacute|#225)' => {'tex' => '\341', 'web' => "\x{e1}"}, # a grave.
1012: '(acirc|#226)' => {'tex' => '\342', 'web' => "\x{e2}"}, # a circumflex.
1013: '(atilde|#227)' => {'tex' => '\343', 'web' => "\x{e3}"}, # a tilde.
1014: '(auml|#228)' => {'tex' => '\344', 'web' => "\x{e4}"}, # a umlaut
1015: '(aring|#229)' => {'tex' => '\345', 'web' => "\x{e5}"}, # a ring on top.
1016: '(aelig|#230)' => {'tex' => '\346', 'web' => "\x{e6}"}, # ae ligature.
1017: '(ccedil|#231)' => {'tex' => '\347', 'web' => "\x{e7}"}, # C cedilla
1018: '(egrave|#232)' => {'tex' => '\350', 'web' => "\x{e8}"}, # e accent grave.
1019: '(eacute|#233)' => {'tex' => '\351', 'web' => "\x{e9}"}, # e accent acute.
1020: '(ecirc|#234)' => {'tex' => '\352', 'web' => "\x{ea}" }, # e circumflex.
1021: '(euml|#235)' => {'tex' => '\353', 'web' => "\x{eb}"}, # e umlaut.
1022: '(igrave|#236)' => {'tex' => '\354', 'web' => "\x{ec}"}, # i grave.
1023: '(iacute|#237)' => {'tex' => '\355', 'web' => "\x{ed}"}, # i acute.
1024: '(icirc|#238)' => {'tex' => '\356', 'web' => "\x{ee}"}, # i circumflex.
1025: '(iuml|#239)' => {'tex' => '\357', 'web' => "\x{ef}"}, # i umlaut.
1026: '(eth|#240)' => {'tex' => '\360', 'web' => "\x{f0}"}, # Icelandic eth.
1027: '(ntilde|#241)' => {'tex' => '\361', 'web' => "\x{f1}"}, # n tilde.
1028: '(ograve|#242)' => {'tex' => '\362', 'web' => "\x{f2}"}, # o grave.
1029: '(oacute|#243)' => {'tex' => '\363', 'web' => "\x{f3}"}, # o acute.
1030: '(ocirc|#244)' => {'tex' => '\364', 'web' => "\x{f4}"}, # o circumflex.
1031: '(otilde|#245)' => {'tex' => '\365', 'web' => "\x{f5}"}, # o tilde.
1032: '(ouml|#246)' => {'tex' => '\366', 'web' => "\x{f6}"}, # o umlaut.
1033: '(divide|#247)' => {'tex' => '\367', 'web' => "\x{f7}"}, # division symbol
1034: '(oslash|#248)' => {'tex' => '\370', 'web' => "\x{f8}"}, # o slashed.
1035: '(ugrave|#249)' => {'tex' => '\371', 'web' => "\x{f9}"}, # u accent grave.
1036: '(uacute|#250)' => {'tex' => '\372', 'web' => "\x{fa}"}, # u acute.
1037: '(ucirc|#251)' => {'tex' => '\373', 'web' => "\x{fb}"}, # u circumflex.
1038: '(uuml|#252)' => {'tex' => '\374', 'web' => "\x{fc}"}, # u umlaut.
1039: '(yacute|#253)' => {'tex' => '\375', 'web' => "\x{fd}"}, # y acute accent.
1040: '(thorn|#254)' => {'tex' => '\376', 'web' => "\x{fe}"}, # small thorn (icelandic).
1041: '(yuml|#255)' => {'tex' => '\377', 'web' => "\x{ff}"}, # y umlaut.
1042:
1043: # Latin extended A entities:
1044:
1045: '(OElig|#338)' => {'tex' => '{/Text \326}', 'web' => "\x{152}"}, # OE ligature.
1046: '(oelig|#339)' => {'tex' => '{/Text \366}', 'web' => "\x{153}"}, # oe ligature.
1047: '(Scaron|#352)' => {'tex' => 'S', 'web' => "\x{160}"}, # S caron no printable.
1048: '(scaron|#353)' => {'tex' => 's', 'web' => "\x{161}"}, # s caron no printable.
1049: '(Yuml|#376)' => {'tex' => 'Y', 'web' => "\x{178}"}, # Y umlaut - no printable.
1050:
1051: # Latin extended B.
1052:
1053: '(fnof|#402)' => {'tex' =>'{/Symbol \246}', 'web' => "\x{192}"}, # f with little hook.
1054:
1055: # Standalone accents:
1056:
1057: '(circ|#710)' => {'tex' => '^', 'web' => '^'}, # circumflex.
1058: '(tilde|#732)' => {'tex' => '~', 'web' => '~'}, # tilde.
1059:
1060: # General punctuation. We're not able to make a distinction between
1061: # the various length spacings in the print version. (e.g. en/em/thin).
1062: # the various joiners will be empty strings in the print version too.
1063:
1064:
1065: '(ensp|#8194)' => {'tex' => ' ', 'web' => "\x{2002}"}, # en space.
1066: '(emsp|#8195)' => {'tex' => ' ', 'web' => "\x{2003}"}, # em space.
1067: '(thinsp|#8201)' => {'tex' => ' ', 'web' => "\x{2009}"}, # thin space.
1068: '(zwnj|#8204)' => {'tex' => ' ', 'web' => "\x{200c}"}, # Zero width non joiner.
1069: '(zwj|#8205)' => {'tex' => ' ', 'web' => "\x{200d}"}, # Zero width joiner.
1070: '(lrm|#8206)' => {'tex' => ' ', 'web' => "\x{200e}"}, # Left to right mark
1071: '(rlm|#8207)' => {'tex' => ' ', 'web' => "\x{200f}"}, # right to left mark.
1072: '(ndash|#8211)' => {'tex' => '{/Text \55}', 'web' => "\x{2013}"}, # en dash.
1073: '(mdash|#8212)' => {'tex' => '{/Symbol \55}', 'web' => "\x{2014}"}, # em dash.
1074: '(lsquo|#8216)' => {'tex' => '{/Text \140}', 'web' => "\x{2018}"}, # Left single quote.
1075: '(rsquo|#8217)' => {'tex' => '\47', 'web' => "\x{2019}"}, # Right single quote.
1076: '(sbquo|#8218)' => {'tex' => '\54', 'web' => "\x{201a}"}, # Single low-9 quote.
1077: '(ldquo|#8220)' => {'tex' => '\42', 'web' => "\x{201c}"}, # Left double quote.
1078: '(rdquo|#8221)' => {'tex' => '\42', 'web' => "\x{201d}"}, # Right double quote.
1079: '(bdquo|#8222)' => {'tex' => ',', 'web' => "\x{201e}"}, # Double low-9 quote.
1080: '(dagger|#8224)' => {'tex' => '+', 'web' => "\x{2020}"}, # Is this a dagger I see before me now?
1081: '(Dagger|#8225)' => {'tex' => '\261', 'web' => "\x{2021}"}, # it's handle pointing towards my heart?
1082: '(bull|#8226)' => {'tex' => '\267', 'web' => "\x{2022}"}, # Bullet.
1083: '(hellep|#8230)' => {'tex' => '{/Symbol \274}', 'web' => "\x{2026}"}, # Ellipses.
1084: '(permil|#8240)' => {'tex' => '%_o', 'web' => "\x{2031}"}, # Per mille.
1085: '(prime|#8242)' => {'tex' => '\264', 'web' => "\x{2032}"}, # Prime.
1086: '(Prime|#8243)' => {'tex' => '{/Symbol \262}', 'web' => "\x{2033}"}, # double prime.
1087: '(lsaquo|#8249)' => {'tex' => '<', 'web' => "\x{2039}"}, # < quote.
1088: '(rsaquo|#8250)' => {'tex' => '\74', 'web' => "\x{203a}"}, # > quote.
1089: '(oline|#8254)' => {'tex' => '{/Symbol \140}', 'web' => "\x{203e}"}, # Overline.
1090: '(frasl|#8260)' => {'tex' => '/', 'web' => "\x{2044}"}, # Fraction slash.
1091: '(euro|#8364)' => {'tex' => '{/Symbol \240}', 'web' => "\x{20ac}"}, # Euro currency.
1092:
1093: # Letter like symbols.
1094:
1095: '(weierp|#8472)' => {'tex' => '{/Symbol \303}', 'web' => "\x{2118}"}, # Power set symbol
1096: '(image|#8465)' => {'tex' => '{/Symbol \301}', 'web' => "\x{2111}"}, # Imaginary part
1097: '(real|#8476)' => {'tex' => '{/Symbol \302}', 'web' => "\x{211c}"}, # Real part.
1098: '(trade|#8482)' => {'tex' => '{/Symbol \344}', 'web' => "\x{2122}"}, # trademark symbol.
1099: '(alefsym|#8501)' => {'tex' => '{/Symbol \300}', 'web' => "\x{2135}"}, # Hebrew alef.
1100:
1101: # Arrows of various types and directions.
1102: '(larr|#8592)' => {'tex' => '{/Symbol \254}', 'web' => "\x{2190}"}, # <--
1103: '(uarr|#8593)' => {'tex' => '{/Symbol \255}', 'web' => "\x{2191}"}, # up arrow.
1104: '(rarr|#8594)' => {'tex' => '{/Symbol \256}', 'web' => "\x{2192}"}, # -->
1105: '(darr|#8595)' => {'tex' => '{/Symbol \257}', 'web' => "\x{2193}"}, # down arrow.
1106: '(harr|#8596)' => {'tex' => '{/Symbol \253}', 'web' => "\x{2194}"}, # <-->
1107: '(crarr|#8629)' => {'tex' => '{/Symbol \277}', 'web' => "\x{21b5}"}, # corner arrow down and right.
1108: '(lArr|#8656)' => {'tex' => '{/Symbol \334}', 'web' => "\x{21d0}"}, # <==
1109: '(uArr|#8657)' => {'tex' => '{/Symbol \335}', 'web' => "\x{21d1}"}, # Up double arrow.
1110: '(rArr|#8658)' => {'tex' => '{/Symbol \336}', 'web' => "\x{21d2}"}, # ==>
1111: '(dArr|#8659)' => {'tex' => '{/Symbol \337}', 'web' => "\x{21d3}"}, # Down double arrow.
1112: '(hArr|#8660)' => {'tex' => '{/Symbol \333}', 'web' => "\x{21d4}"}, # <==>
1113:
1114: # Mathematical operators. For some of these we do the best we can in printing.
1115:
1116: '(forall|#8704)' => {'tex' => '{/Symbol \42}', 'web' => "\x{2200}"}, # For all.
1117: '(part|#8706)' => {'tex' => '{/Symbol d}', 'web' => "\x{2202}"}, # partial derivative
1118: '(exist|#8707)' => {'tex' => '{/Symbol \44}', 'web' => "\x{2203}"}, # There exists.
1119: '(empty|#8709)' => {'tex' => '{/Symbol \306}', 'web' => "\x{2205}"}, # Null set.
1120: '(nabla|#8711)' => {'tex' => '{/Symbol \321}', 'web' => "\x{2207}"}, # Gradient e.g.
1121: '(isin|#8712)' => {'tex' => '{/Symbol \316}', 'web' => "\x{2208}"}, # Element of the set.
1122: '(notin|#8713)' => {'tex' => '{/Symbol \317}', 'web' => "\x{2209}"}, # Not an element of
1123: '(ni|#8715)' => {'tex' => '{/Symbol \47}', 'web' => "\x{220b}"}, # Contains as a member
1124: '(prod|#8719)' => {'tex' => '{/Symbol \325}', 'web' => "\x{220f}"}, # Product
1125: '(sum|#8721)' => {'tex' => '{/Symbol \345}', 'web' => "\x{2211}"}, # Sum of.
1126: '(minus|#8722)' => {'tex' => '{/Symbol \55}', 'web' => "\x{2212}"}, # - sign.
1127: '(lowast|#8727)' => {'tex' => '*', 'web' => "\x{2217}"}, # *
1128: '(radic|#8730)' => {'tex' => '{/Symbol \326}', 'web' => "\x{221a}"}, # Square root.
1129: '(prop|#8733)' => {'tex' => '{/Symbol \265}', 'web' => "\x{221d}"}, # Proportional to.
1130: '(infin|#8734)' => {'tex' => '{/Symbol \245}', 'web' => "\x{221e}"}, # Infinity.
1131: '(ang|#8736)' => {'tex' => '{/Symbol \320}', 'web' => "\x{2220}"}, # Angle .
1132: '(and|#8743)' => {'tex' => '{/Symbol \331}', 'web' => "\x{2227}"}, # Logical and.
1133: '(or|#8744)' => {'tex' => '{/Symbol \332}', 'web' => "\x{2228}"}, # Logical or.
1134: '(cap|#8745)' => {'tex' => '{/Symbol \307}', 'web' => "\x{2229}"}, # Set intersection.
1135: '(cup|#8746)' => {'tex' => '{/Symbol \310}', 'web' => "\x{222a}"}, # Set union.
1136: '(int|8747)' => {'tex' => '{/Symbol \362}', 'web' => "\x{222b}"}, # Integral.
1137:
1138: # Some gnuplot guru will have to explain to me why the next three
1139: # require the extra slashes... else they print very funkily.
1140:
1141: '(there4|#8756)' => {'tex' => '{/Symbol \\\134}', 'web' => "\x{2234}"}, # Therefore triple dots.
1142: '(sim|#8764)' => {'tex' => '\\\176', 'web' => "\x{223c}"}, # Simlar to.
1143: '(cong|#8773)' => {'tex' => '{/Symbol \\\100}','web' => "\x{2245}"}, # Congruent to/with.
1144:
1145: '(asymp|#8776)' => {'tex' => '{/Symbol \273}', 'web' => "\x{2248}"}, # Asymptotic to.
1146: '(ne|#8800)' => {'tex' => '{/Symbol \271}', 'web' => "\x{2260}"}, # not equal to.
1147: '(equiv|#8801)' => {'tex' => '{/Symbol \272}', 'web' => "\x{2261}"}, # Equivalent to.
1148: '(le|8804)' => {'tex' => '{/Symbol \243}', 'web' => "\x{2264}"}, # Less than or equal to.
1149: '(ge|8805)' => {'tex' => '{/Symbol \263}', 'web' => "\x{2265}"}, # Greater than or equal to
1150: '(sub|8834)' => {'tex' => '{/Symbol \314}', 'web' => "\x{2282}"}, # Subset of.
1151: '(sup|8835)' => {'tex' => '{/Symbol \311}', 'web' => "\x{2283}"}, # Super set of.
1152: '(nsub|8836)' => {'tex' => '{/Symbol \313}', 'web' => "\x{2284}"}, # not subset of.
1153: '(sube|8838)' => {'tex' => '{/Symbol \315}', 'web' => "\x{2286}"}, # Subset or equal.
1154: '(supe|8839)' => {'tex' => '{/Symbol \312}', 'web' => "\x{2287}"}, # Superset or equal
1155: '(oplus|8853)' => {'tex' => '{/Symbol \305}', 'web' => "\x{2295}"}, # O with plus inside
1156: '(otimes|8855)' => {'tex' => '{/Symbol \304}', 'web' => "\x{2297}"}, # O with times.
1157: '(perp|8869)' => {'tex' => '{/Symbol \136}', 'web' => "\x{22a5}"}, # Perpendicular.
1158: '(sdot|8901)' => {'tex' => '{/Symbol \227}', 'web' => "\x{22c5}"}, # Dot operator.
1159:
1160: # Misc. technical symbols:
1161:
1162: '(lceil|8698)' => {'tex' => '{/Symbol \351}', 'web' => "\x{2308}"}, # Left ceiling.
1163: '(rceil|8969)' => {'tex' => '{/Symbol \371}', 'web' => "\x{2309}"}, # Right ceiling.
1164: '(lfloor|8970)' => {'tex' => '{/Symbol \353}', 'web' => "\x{230a}"}, # Left floor.
1165: '(rfloor|8971)' => {'tex' => '{/Symbol \373}', 'web' => "\x{230b}"}, # Right floor.
1166:
1167: # The gnuplot png font evidently does not have the big angle brackets at
1168: # positions 0x2329, 0x232a so use ordinary brackets.
1169:
1170: '(lang|9001)' => {'tex' => '{/Symbol \341}', 'web' => '<'}, # Left angle bracket.
1171: '(rang|9002)' => {'tex' => '{/Symbol \361}', 'web' => '>'}, # Right angle bracket.
1172:
1173: # Gemoetric shapes.
1174:
1175: '(loz|9674)' => {'tex' => '{/Symbol \340}', 'web' => "\x{25ca}"}, # Lozenge.
1176:
1177: # Misc. symbols
1178:
1179: '(spades|9824)' => {'tex' => '{/Symbol \252}', 'web' => "\x{2660}"},
1180: '(clubs|9827)' => {'tex' => '{/Symbol \247}', 'web' => "\x{2663}"},
1181: '(hearts|9829)' => {'tex' => '{/Symbol \251}', 'web' => "\x{2665}"},
1182: '(diams|9830)' => {'tex' => '{/Symbol \250}', 'web' => "\x{2666}"}
1183:
1184: );
1185:
1186:
1187: sub replace_entities {
1188: my ($target,$text) = @_;
1189: $text =~ s{([_^~\{\}]|\\\\)}{\\\\$1}g;
1190: while (my ($re, $replace) = each(%lookup)) {
1191: my $repl = $replace->{$target};
1192: $text =~ s/&$re;/$replace->{$target}/g;
1193: }
1194: $text =~ s{(&)}{\\\\$1}g;
1195: return $text;
1196: }
1197:
1198: ##------------------------------------------------------------------- title
1199: sub start_title {
1200: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1201: my $result='';
1202: if ($target eq 'web' || $target eq 'tex') {
1203: $title = &Apache::lonxml::get_all_text("/title",$parser,$style);
1204: $title=&Apache::run::evaluate($title,$safeeval,$$parstack[-1]);
1205: $title =~ s/\n/ /g;
1206: if (length($title) > $max_str_len) {
1207: $title = substr($title,0,$max_str_len);
1208: }
1209: $title = &parse_label($target,$title);
1210: } elsif ($target eq 'edit') {
1211: $result.=&Apache::edit::tag_start($target,$token,'Plot Title');
1212: my $text=&Apache::lonxml::get_all_text("/title",$parser,$style);
1213: $result.=&Apache::edit::editline('',$text,'',60);
1214: } elsif ($target eq 'modified') {
1215: $result.=&Apache::edit::rebuild_tag($token);
1216: $result.=&Apache::edit::modifiedfield("/title",$parser);
1217: }
1218: return $result;
1219: }
1220:
1221: sub end_title {
1222: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1223: my $result = '';
1224: if ($target eq 'web' || $target eq 'tex') {
1225: } elsif ($target eq 'edit') {
1226: $result.=&Apache::edit::tag_end($target,$token);
1227: }
1228: return $result;
1229: }
1230: ##------------------------------------------------------------------- xlabel
1231: sub start_xlabel {
1232: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1233: my $result='';
1234: if ($target eq 'web' || $target eq 'tex') {
1235: $xlabel = &Apache::lonxml::get_all_text("/xlabel",$parser,$style);
1236: $xlabel=&Apache::run::evaluate($xlabel,$safeeval,$$parstack[-1]);
1237: $xlabel =~ s/\n/ /g;
1238: if (length($xlabel) > $max_str_len) {
1239: $xlabel = substr($xlabel,0,$max_str_len);
1240: }
1241: $xlabel = &parse_label($target,$xlabel);
1242: } elsif ($target eq 'edit') {
1243: $result.=&Apache::edit::tag_start($target,$token,'Plot Xlabel');
1244: my $text=&Apache::lonxml::get_all_text("/xlabel",$parser,$style);
1245: $result.=&Apache::edit::editline('',$text,'',60);
1246: } elsif ($target eq 'modified') {
1247: $result.=&Apache::edit::rebuild_tag($token);
1248: $result.=&Apache::edit::modifiedfield("/xlabel",$parser);
1249: }
1250: return $result;
1251: }
1252:
1253: sub end_xlabel {
1254: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1255: my $result = '';
1256: if ($target eq 'web' || $target eq 'tex') {
1257: } elsif ($target eq 'edit') {
1258: $result.=&Apache::edit::tag_end($target,$token);
1259: }
1260: return $result;
1261: }
1262:
1263: ##------------------------------------------------------------------- ylabel
1264: sub start_ylabel {
1265: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1266: my $result='';
1267: if ($target eq 'web' || $target eq 'tex') {
1268: $ylabel = &Apache::lonxml::get_all_text("/ylabel",$parser,$style);
1269: $ylabel = &Apache::run::evaluate($ylabel,$safeeval,$$parstack[-1]);
1270: $ylabel =~ s/\n/ /g;
1271: if (length($ylabel) > $max_str_len) {
1272: $ylabel = substr($ylabel,0,$max_str_len);
1273: }
1274: $ylabel = &parse_label($target,$ylabel);
1275: } elsif ($target eq 'edit') {
1276: $result .= &Apache::edit::tag_start($target,$token,'Plot Ylabel');
1277: my $text = &Apache::lonxml::get_all_text("/ylabel",$parser,$style);
1278: $result .= &Apache::edit::editline('',$text,'',60);
1279: } elsif ($target eq 'modified') {
1280: $result.=&Apache::edit::rebuild_tag($token);
1281: $result.=&Apache::edit::modifiedfield("/ylabel",$parser);
1282: }
1283: return $result;
1284: }
1285:
1286: sub end_ylabel {
1287: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1288: my $result = '';
1289: if ($target eq 'web' || $target eq 'tex') {
1290: } elsif ($target eq 'edit') {
1291: $result.=&Apache::edit::tag_end($target,$token);
1292: }
1293: return $result;
1294: }
1295:
1296: ##------------------------------------------------------------------- label
1297: sub start_label {
1298: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1299: my $result='';
1300: if ($target eq 'web' || $target eq 'tex') {
1301: my %label;
1302: &get_attributes(\%label,\%label_defaults,$parstack,$safeeval,
1303: $tagstack->[-1]);
1304: my $text = &Apache::lonxml::get_all_text("/label",$parser,$style);
1305: $text = &Apache::run::evaluate($text,$safeeval,$$parstack[-1]);
1306: $text =~ s/\n/ /g;
1307: $text = substr($text,0,$max_str_len) if (length($text) > $max_str_len);
1308: $label{'text'} = &parse_label($target,$text);
1309: push(@labels,\%label);
1310: } elsif ($target eq 'edit') {
1311: $result .= &Apache::edit::tag_start($target,$token,'Plot Label');
1312: $result .= &edit_attributes($target,$token,\%label_defaults);
1313: my $text = &Apache::lonxml::get_all_text("/label",$parser,$style);
1314: $result .= &Apache::edit::end_row().
1315: &Apache::edit::start_spanning_row().
1316: &Apache::edit::editline('',$text,'',60);
1317: } elsif ($target eq 'modified') {
1318: &Apache::edit::get_new_args
1319: ($token,$parstack,$safeeval,keys(%label_defaults));
1320: $result.=&Apache::edit::rebuild_tag($token);
1321: $result.=&Apache::edit::modifiedfield("/label",$parser);
1322: }
1323: return $result;
1324: }
1325:
1326: sub end_label {
1327: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1328: my $result = '';
1329: if ($target eq 'web' || $target eq 'tex') {
1330: } elsif ($target eq 'edit') {
1331: $result.=&Apache::edit::tag_end($target,$token);
1332: }
1333: return $result;
1334: }
1335:
1336: ##------------------------------------------------------------------- curve
1337: sub start_curve {
1338: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1339: my $result='';
1340: &Apache::lonxml::register('Apache::lonplot',('function','data'));
1341: push (@Apache::lonxml::namespace,'curve');
1342: if ($target eq 'web' || $target eq 'tex') {
1343: my %curve;
1344: &get_attributes(\%curve,\%curve_defaults,$parstack,$safeeval,
1345: $tagstack->[-1]);
1346: push (@curves,\%curve);
1347: } elsif ($target eq 'edit') {
1348: $result .= &Apache::edit::tag_start($target,$token,'Curve');
1349: $result .= &edit_attributes($target,$token,\%curve_defaults,
1350: \@curve_edit_order)
1351: .&Apache::edit::end_row()
1352: .&Apache::edit::start_spanning_row();
1353:
1354: } elsif ($target eq 'modified') {
1355: my $constructtag=&Apache::edit::get_new_args
1356: ($token,$parstack,$safeeval,keys(%curve_defaults));
1357: if ($constructtag) {
1358: $result = &Apache::edit::rebuild_tag($token);
1359: }
1360: }
1361: return $result;
1362: }
1363:
1364: sub end_curve {
1365: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1366: my $result = '';
1367: pop @Apache::lonxml::namespace;
1368: &Apache::lonxml::deregister('Apache::lonplot',('function','data'));
1369: if ($target eq 'web' || $target eq 'tex') {
1370: } elsif ($target eq 'edit') {
1371: $result.=&Apache::edit::tag_end($target,$token);
1372: }
1373: return $result;
1374: }
1375:
1376: ##------------------------------------------------------------ curve function
1377: sub start_function {
1378: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1379: my $result='';
1380: if ($target eq 'web' || $target eq 'tex') {
1381: if (exists($curves[-1]->{'data'})) {
1382: &Apache::lonxml::warning
1383: ('Use of the <b>curve function</b> tag precludes use of '.
1384: ' the <b>curve data</b> tag. '.
1385: 'The curve data tag will be omitted in favor of the '.
1386: 'curve function declaration.');
1387: delete $curves[-1]->{'data'} ;
1388: }
1389: my $function = &Apache::lonxml::get_all_text("/function",$parser,
1390: $style);
1391: $function = &Apache::run::evaluate($function,$safeeval,$$parstack[-1]);
1392: $function=~s/\^/\*\*/gs;
1393: $curves[-1]->{'function'} = $function;
1394: } elsif ($target eq 'edit') {
1395: $result .= &Apache::edit::tag_start($target,$token,'Gnuplot compatible curve function');
1396: my $text = &Apache::lonxml::get_all_text("/function",$parser,$style);
1397: $result .= &Apache::edit::editline('',$text,'',60);
1398: } elsif ($target eq 'modified') {
1399: $result.=&Apache::edit::rebuild_tag($token);
1400: $result.=&Apache::edit::modifiedfield("/function",$parser);
1401: }
1402: return $result;
1403: }
1404:
1405: sub end_function {
1406: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1407: my $result = '';
1408: if ($target eq 'web' || $target eq 'tex') {
1409: } elsif ($target eq 'edit') {
1410: $result .= &Apache::edit::end_table();
1411: }
1412: return $result;
1413: }
1414:
1415: ##------------------------------------------------------------ curve data
1416: sub start_data {
1417: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1418: my $result='';
1419: if ($target eq 'web' || $target eq 'tex') {
1420: if (exists($curves[-1]->{'function'})) {
1421: &Apache::lonxml::warning
1422: ('Use of the <b>curve function</b> tag precludes use of '.
1423: ' the <b>curve data</b> tag. '.
1424: 'The curve function tag will be omitted in favor of the '.
1425: 'curve data declaration.');
1426: delete($curves[-1]->{'function'});
1427: }
1428: my $datatext = &Apache::lonxml::get_all_text("/data",$parser,$style);
1429: $datatext=&Apache::run::evaluate($datatext,$safeeval,$$parstack[-1]);
1430: # Deal with cases where we're given an array...
1431: if ($datatext =~ /^\@/) {
1432: $datatext = &Apache::run::run('return "'.$datatext.'"',
1433: $safeeval,1);
1434: }
1435: $datatext =~ s/\s+/ /g;
1436: # Need to do some error checking on the @data array -
1437: # make sure it's all numbers and make sure each array
1438: # is of the same length.
1439: my @data;
1440: if ($datatext =~ /,/) { # comma deliminated
1441: @data = split /,/,$datatext;
1442: } else { # Assume it's space separated.
1443: @data = split / /,$datatext;
1444: }
1445: for (my $i=0;$i<=$#data;$i++) {
1446: # Check that it's non-empty
1447: if (! defined($data[$i])) {
1448: &Apache::lonxml::warning(
1449: 'undefined curve data value. Replacing with '.
1450: ' pi/e = 1.15572734979092');
1451: $data[$i] = 1.15572734979092;
1452: }
1453: # Check that it's a number
1454: if (! &$real_test($data[$i]) & ! &$int_test($data[$i])) {
1455: &Apache::lonxml::warning(
1456: 'Bad curve data value of '.$data[$i].' Replacing with '.
1457: ' pi/e = 1.15572734979092');
1458: $data[$i] = 1.15572734979092;
1459: }
1460: }
1461: # complain if the number of data points is not the same as
1462: # in previous sets of data.
1463: if (($curves[-1]->{'data'}) && ($#data != $#{$curves[-1]->{'data'}->[0]})){
1464: &Apache::lonxml::warning
1465: ('Number of data points is not consistent with previous '.
1466: 'number of data points');
1467: }
1468: push @{$curves[-1]->{'data'}},\@data;
1469: } elsif ($target eq 'edit') {
1470: $result .= &Apache::edit::tag_start($target,$token,'Comma or space deliminated curve data');
1471: my $text = &Apache::lonxml::get_all_text("/data",$parser,$style);
1472: $result .= &Apache::edit::editline('',$text,'',60);
1473: } elsif ($target eq 'modified') {
1474: $result.=&Apache::edit::rebuild_tag($token);
1475: $result.=&Apache::edit::modifiedfield("/data",$parser);
1476: }
1477: return $result;
1478: }
1479:
1480: sub end_data {
1481: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1482: my $result = '';
1483: if ($target eq 'web' || $target eq 'tex') {
1484: } elsif ($target eq 'edit') {
1485: $result .= &Apache::edit::end_table();
1486: }
1487: return $result;
1488: }
1489:
1490: ##------------------------------------------------------------------- axis
1491: sub start_axis {
1492: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1493: my $result='';
1494: if ($target eq 'web' || $target eq 'tex') {
1495: &get_attributes(\%axis,\%axis_defaults,$parstack,$safeeval,
1496: $tagstack->[-1]);
1497: } elsif ($target eq 'edit') {
1498: $result .= &Apache::edit::tag_start($target,$token,'Plot Axes');
1499: $result .= &edit_attributes($target,$token,\%axis_defaults,
1500: \@axis_edit_order);
1501: } elsif ($target eq 'modified') {
1502: my $constructtag=&Apache::edit::get_new_args
1503: ($token,$parstack,$safeeval,keys(%axis_defaults));
1504: if ($constructtag) {
1505: $result = &Apache::edit::rebuild_tag($token);
1506: }
1507: }
1508: return $result;
1509: }
1510:
1511: sub end_axis {
1512: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1513: my $result = '';
1514: if ($target eq 'web' || $target eq 'tex') {
1515: } elsif ($target eq 'edit') {
1516: $result.=&Apache::edit::tag_end($target,$token);
1517: } elsif ($target eq 'modified') {
1518: }
1519: return $result;
1520: }
1521:
1522: ###################################################################
1523: ## ##
1524: ## Utility Functions ##
1525: ## ##
1526: ###################################################################
1527:
1528: ##----------------------------------------------------------- set_defaults
1529: sub set_defaults {
1530: my ($var,$defaults) = @_;
1531: my $key;
1532: foreach $key (keys(%$defaults)) {
1533: $var->{$key} = $defaults->{$key}->{'default'};
1534: }
1535: }
1536:
1537: ##------------------------------------------------------------------- misc
1538: sub get_attributes{
1539: my ($values,$defaults,$parstack,$safeeval,$tag) = @_;
1540: foreach my $attr (keys(%{$defaults})) {
1541: if ($attr eq 'texwidth' || $attr eq 'texfont') {
1542: $values->{$attr} =
1543: &Apache::lonxml::get_param($attr,$parstack,$safeeval,undef,1);
1544: } else {
1545: $values->{$attr} =
1546: &Apache::lonxml::get_param($attr,$parstack,$safeeval);
1547: }
1548: if ($values->{$attr} eq '' | !defined($values->{$attr})) {
1549: $values->{$attr} = $defaults->{$attr}->{'default'};
1550: next;
1551: }
1552: my $test = $defaults->{$attr}->{'test'};
1553: if (! &$test($values->{$attr})) {
1554: &Apache::lonxml::warning
1555: ($tag.':'.$attr.': Bad value.'.'Replacing your value with : '
1556: .$defaults->{$attr}->{'default'} );
1557: $values->{$attr} = $defaults->{$attr}->{'default'};
1558: }
1559: }
1560: return ;
1561: }
1562:
1563: ##------------------------------------------------------- write_gnuplot_file
1564: sub write_gnuplot_file {
1565: my ($tmpdir,$filename,$target)= @_;
1566: my ($fontsize, $font_properties) = &get_font($target);
1567: my $gnuplot_input = '';
1568: my $curve;
1569: #
1570: # Check to be sure we do not have any empty curves
1571: my @curvescopy;
1572: foreach my $curve (@curves) {
1573: if (exists($curve->{'function'})) {
1574: if ($curve->{'function'} !~ /^\s*$/) {
1575: push(@curvescopy,$curve);
1576: }
1577: } elsif (exists($curve->{'data'})) {
1578: foreach my $data (@{$curve->{'data'}}) {
1579: if (scalar(@$data) > 0) {
1580: push(@curvescopy,$curve);
1581: last;
1582: }
1583: }
1584: }
1585: }
1586: @curves = @curvescopy;
1587: # Collect all the colors
1588: my @Colors;
1589: push @Colors, $Apache::lonplot::plot{'bgcolor'};
1590: push @Colors, $Apache::lonplot::plot{'fgcolor'};
1591: push @Colors, (defined($axis{'color'})?$axis{'color'}:$Apache::lonplot::plot{'fgcolor'});
1592: foreach $curve (@curves) {
1593: push @Colors, ($curve->{'color'} ne '' ?
1594: $curve->{'color'} :
1595: $Apache::lonplot::plot{'fgcolor'} );
1596: }
1597: # set term
1598: if ($target eq 'web') {
1599: $gnuplot_input .= 'set terminal png enhanced nocrop ';
1600: $gnuplot_input .= 'transparent ' if ($Apache::lonplot::plot{'transparent'} eq 'on');
1601: $gnuplot_input .= 'font "'.$Apache::lonnet::perlvar{'lonFontsDir'}.
1602: '/'.$font_properties->{'file'}.'.ttf" ';
1603: $gnuplot_input .= $fontsize;
1604: $gnuplot_input .= ' size '.$Apache::lonplot::plot{'width'}.','.$Apache::lonplot::plot{'height'}.' ';
1605: $gnuplot_input .= "@Colors\n";
1606: # set output
1607: $gnuplot_input .= "set output\n";
1608: } elsif ($target eq 'tex') {
1609: $gnuplot_input .= "set term postscript eps enhanced $Apache::lonplot::plot{'plotcolor'} solid ";
1610: if (!$font_properties->{'tex_no_file'}) {
1611: $gnuplot_input .=
1612: 'fontfile "'.$Apache::lonnet::perlvar{'lonFontsDir'}.
1613: '/'.$font_properties->{'file'}.'.pfb" ';
1614: }
1615: $gnuplot_input .= ' "'.$font_properties->{'printname'}.'" ';
1616: $gnuplot_input .= $fontsize;
1617: $gnuplot_input .= "\nset output \"".$tmpdir.
1618: &unescape($filename).".eps\"\n";
1619: $gnuplot_input .= "set encoding iso_8859_1\n"; # Get access to extended font.
1620:
1621: }
1622: # cartesian or polar plot?
1623: if (lc($Apache::lonplot::plot{'plottype'}) eq 'polar') {
1624: $gnuplot_input .= 'set polar'.$/;
1625: } else {
1626: # Assume Cartesian
1627: }
1628: # cartesian or polar grid?
1629: if (lc($Apache::lonplot::plot{'gridtype'}) eq 'polar') {
1630: $gnuplot_input .= 'set grid polar'.$/;
1631: } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'linear-log') {
1632: $gnuplot_input .= 'set logscale x'.$/;
1633: } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'log-linear') {
1634: $gnuplot_input .= 'set logscale y'.$/;
1635: } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'log-log') {
1636: $gnuplot_input .= 'set logscale x'.$/;
1637: $gnuplot_input .= 'set logscale y'.$/;
1638: } else {
1639: # Assume Cartesian
1640: }
1641: # solid or pattern for boxes?
1642: if (lc($Apache::lonplot::plot{'fillstyle'}) eq 'solid') {
1643: $gnuplot_input .= 'set style fill solid '.
1644: $Apache::lonplot::plot{'solid'}.$Apache::lonplot::plot{'box_border'}.$/;
1645: } elsif (lc($Apache::lonplot::plot{'fillstyle'}) eq 'pattern') {
1646: $gnuplot_input .= 'set style fill pattern '.$Apache::lonplot::plot{'pattern'}.$Apache::lonplot::plot{'box_border'}.$/;
1647: } elsif (lc($Apache::lonplot::plot{'fillstyle'}) eq 'empty') {
1648: }
1649: # margin
1650: if (lc($Apache::lonplot::plot{'lmargin'}) ne 'default') {
1651: $gnuplot_input .= 'set lmargin '.$Apache::lonplot::plot{'lmargin'}.$/;
1652: }
1653: if (lc($Apache::lonplot::plot{'rmargin'}) ne 'default') {
1654: $gnuplot_input .= 'set rmargin '.$Apache::lonplot::plot{'rmargin'}.$/;
1655: }
1656: if (lc($Apache::lonplot::plot{'tmargin'}) ne 'default') {
1657: $gnuplot_input .= 'set tmargin '.$Apache::lonplot::plot{'tmargin'}.$/;
1658: }
1659: if (lc($Apache::lonplot::plot{'bmargin'}) ne 'default') {
1660: $gnuplot_input .= 'set bmargin '.$Apache::lonplot::plot{'bmargin'}.$/;
1661: }
1662:
1663: # tic scales
1664: if ($version > 4) {
1665: $gnuplot_input .= 'set tics scale '.
1666: $Apache::lonplot::plot{'major_ticscale'}.', '.$Apache::lonplot::plot{'minor_ticscale'}.$/;
1667: } else {
1668: $gnuplot_input .= 'set ticscale '.
1669: $Apache::lonplot::plot{'major_ticscale'}.' '.$Apache::lonplot::plot{'minor_ticscale'}.$/;
1670: }
1671: #boxwidth
1672: if (lc($Apache::lonplot::plot{'boxwidth'}) ne '') {
1673: $gnuplot_input .= 'set boxwidth '.$Apache::lonplot::plot{'boxwidth'}.$/;
1674: }
1675: # gridlayer
1676: $gnuplot_input .= 'set grid noxtics noytics front '.$/
1677: if ($Apache::lonplot::plot{'gridlayer'} eq 'on');
1678:
1679: # grid
1680: $gnuplot_input .= 'set grid'.$/ if ($Apache::lonplot::plot{'grid'} eq 'on');
1681: # border
1682: $gnuplot_input .= ($Apache::lonplot::plot{'border'} eq 'on'?
1683: 'set border'.$/ :
1684: 'set noborder'.$/ );
1685: # sampling rate for non-data curves
1686: $gnuplot_input .= "set samples $Apache::lonplot::plot{'samples'}\n";
1687: # title, xlabel, ylabel
1688: # titles
1689: my $extra_space_x = ($xtics{'location'} eq 'axis') ? ' 0, -0.5 ' : '';
1690: my $extra_space_y = ($ytics{'location'} eq 'axis') ? ' -0.5, 0 ' : '';
1691:
1692: if ($target eq 'tex') {
1693: $gnuplot_input .= "set title \"$title\" font \"".$font_properties->{'printname'}.",".$fontsize."pt\"\n" if (defined($title)) ;
1694: $gnuplot_input .= "set xlabel \"$xlabel\" $extra_space_x font \"".$font_properties->{'printname'}.",".$fontsize."pt\"\n" if (defined($xlabel));
1695: $gnuplot_input .= "set ylabel \"$ylabel\" $extra_space_y font \"".$font_properties->{'printname'}.",".$fontsize."pt\"\n" if (defined($ylabel));
1696: } else {
1697: $gnuplot_input .= "set title \"$title\" \n" if (defined($title)) ;
1698: $gnuplot_input .= "set xlabel \"$xlabel\" $extra_space_x \n" if (defined($xlabel));
1699: $gnuplot_input .= "set ylabel \"$ylabel\" $extra_space_y \n" if (defined($ylabel));
1700: }
1701: # tics
1702: if (%xtics) {
1703: $gnuplot_input .= "set xtics $xtics{'location'} ";
1704: $gnuplot_input .= ( $xtics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1705: $gnuplot_input .= "$xtics{'start'}, ";
1706: $gnuplot_input .= "$xtics{'increment'}, ";
1707: $gnuplot_input .= "$xtics{'end'} ";
1708: if ($target eq 'tex') {
1709: $gnuplot_input .= 'font "Helvetica,22"'; # Needed in iso 8859-1 enc.
1710: }
1711: $gnuplot_input .= "\n";
1712: if ($xtics{'minorfreq'} != 0) {
1713: $gnuplot_input .= "set mxtics ".$xtics{'minorfreq'}."\n";
1714: }
1715: } else {
1716: if ($target eq 'tex') {
1717: $gnuplot_input .= 'set xtics font "Helvetica,22"'."\n"; # needed in iso 8859-1 enc
1718: }
1719: }
1720: if (%ytics) {
1721: $gnuplot_input .= "set ytics $ytics{'location'} ";
1722: $gnuplot_input .= ( $ytics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1723: $gnuplot_input .= "$ytics{'start'}, ";
1724: $gnuplot_input .= "$ytics{'increment'}, ";
1725: $gnuplot_input .= "$ytics{'end'} ";
1726: if ($target eq 'tex') {
1727: $gnuplot_input .= 'font "Helvetica,22"'; # Needed in iso-8859-1 encoding.
1728: }
1729: $gnuplot_input .= "\n";
1730: if ($ytics{'minorfreq'} != 0) {
1731: $gnuplot_input .= "set mytics ".$ytics{'minorfreq'}."\n";
1732: }
1733: } else {
1734: if ($target eq 'tex') {
1735: $gnuplot_input .= 'set ytics font "Helvetica,22"'."\n"; # Needed for iso 8859-1 enc.
1736: }
1737: }
1738: # axis
1739: if (%axis) {
1740: if ($axis{'xformat'} ne 'on') {
1741: $gnuplot_input .= "set format x ";
1742: if ($axis{'xformat'} eq 'off') {
1743: $gnuplot_input .= "\"\"\n";
1744: } else {
1745: $gnuplot_input .= "\"\%.".$axis{'xformat'}."\"\n";
1746: }
1747: }
1748: if ($axis{'yformat'} ne 'on') {
1749: $gnuplot_input .= "set format y ";
1750: if ($axis{'yformat'} eq 'off') {
1751: $gnuplot_input .= "\"\"\n";
1752: } else {
1753: $gnuplot_input .= "\"\%.".$axis{'yformat'}."\"\n";
1754: }
1755: }
1756: $gnuplot_input .= "set xrange \[$axis{'xmin'}:$axis{'xmax'}\]\n";
1757: $gnuplot_input .= "set yrange \[$axis{'ymin'}:$axis{'ymax'}\]\n";
1758: if ($axis{'xzero'} ne 'off') {
1759: $gnuplot_input .= "set xzeroaxis ";
1760: if ($axis{'xzero'} eq 'line' || $axis{'xzero'} eq 'thick-line') {
1761: $gnuplot_input .= "lt -1 ";
1762: if ($axis{'xzero'} eq 'thick-line') {
1763: $gnuplot_input .= "lw 3 ";
1764: }
1765: }
1766: $gnuplot_input .= "\n";
1767: }
1768: if ($axis{'yzero'} ne 'off') {
1769: $gnuplot_input .= "set yzeroaxis ";
1770: if ($axis{'yzero'} eq 'line' || $axis{'yzero'} eq 'thick-line') {
1771: $gnuplot_input .= "lt -1 ";
1772: if ($axis{'yzero'} eq 'thick-line') {
1773: $gnuplot_input .= "lw 3 ";
1774: }
1775: }
1776: $gnuplot_input .= "\n";
1777: }
1778: }
1779: # Key
1780: if (%key) {
1781: $gnuplot_input .= 'set key '.$key{'pos'}.' ';
1782: if ($key{'title'} ne '') {
1783: $gnuplot_input .= 'title "'.$key{'title'}.'" ';
1784: }
1785: $gnuplot_input .= ($key{'box'} eq 'on' ? 'box ' : 'nobox ').$/;
1786: } else {
1787: $gnuplot_input .= 'set nokey'.$/;
1788: }
1789: # labels
1790: my $label;
1791: foreach $label (@labels) {
1792: $gnuplot_input .= 'set label "'.$label->{'text'}.'" at '.
1793: $label->{'xpos'}.','.$label->{'ypos'};
1794: if ($label->{'rotate'} ne '') {
1795: $gnuplot_input .= ' rotate by '.$label->{'rotate'};
1796: }
1797: $gnuplot_input .= ' '.$label->{'justify'};
1798:
1799: if ($target eq 'tex') {
1800: $gnuplot_input .=' font "'.$font_properties->{'printname'}.','.$fontsize.'pt"' ;
1801: }
1802: $gnuplot_input .= $/;
1803: }
1804: if ($target eq 'tex') {
1805: $gnuplot_input .="set size 1,".$Apache::lonplot::plot{'height'}/$Apache::lonplot::plot{'width'}*1.38;
1806: $gnuplot_input .="\n";
1807: }
1808: # curves
1809: $gnuplot_input .= 'plot ';
1810: for (my $i = 0;$i<=$#curves;$i++) {
1811: $curve = $curves[$i];
1812: $gnuplot_input.= ', ' if ($i > 0);
1813: if ($target eq 'tex') {
1814: $curve->{'linewidth'} *= 2;
1815: }
1816: if (exists($curve->{'function'})) {
1817: $gnuplot_input.=
1818: $curve->{'function'}.' title "'.
1819: $curve->{'name'}.'" with '.
1820: $curve->{'linestyle'};
1821:
1822: if (($curve->{'linestyle'} eq 'points') ||
1823: ($curve->{'linestyle'} eq 'linespoints') ||
1824: ($curve->{'linestyle'} eq 'errorbars') ||
1825: ($curve->{'linestyle'} eq 'xerrorbars') ||
1826: ($curve->{'linestyle'} eq 'yerrorbars') ||
1827: ($curve->{'linestyle'} eq 'xyerrorbars')) {
1828: $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
1829: $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1830: } elsif ($curve->{'linestyle'} eq 'filledcurves') {
1831: $gnuplot_input.= ' '.$curve->{'limit'};
1832: } elsif ($curve->{'linetype'} ne '' &&
1833: $curve->{'linestyle'} eq 'lines') {
1834: $gnuplot_input.= ' linetype ';
1835: $gnuplot_input.= $linetypes{$curve->{'linetype'}};
1836: $gnuplot_input.= ' linecolor rgb "';
1837: # convert color from xaaaaaa to #aaaaaa
1838: $curve->{'color'} =~ s/^x/#/;
1839: $gnuplot_input.= $curve->{'color'}.'"';
1840: }
1841: $gnuplot_input.= ' linewidth '.$curve->{'linewidth'};
1842:
1843: } elsif (exists($curve->{'data'})) {
1844: # Store data values in $datatext
1845: my $datatext = '';
1846: # get new filename
1847: my $datafilename = "$tmpdir/$filename.data.$i";
1848: my $fh=Apache::File->new(">$datafilename");
1849: # Compile data
1850: my @Data = @{$curve->{'data'}};
1851: my @Data0 = @{$Data[0]};
1852: for (my $i =0; $i<=$#Data0; $i++) {
1853: my $dataset;
1854: foreach $dataset (@Data) {
1855: $datatext .= $dataset->[$i] . ' ';
1856: }
1857: $datatext .= $/;
1858: }
1859: # write file
1860: print $fh $datatext;
1861: close($fh);
1862: # generate gnuplot text
1863: $gnuplot_input.= '"'.$datafilename.'" title "'.
1864: $curve->{'name'}.'" with '.
1865: $curve->{'linestyle'};
1866: if (($curve->{'linestyle'} eq 'points') ||
1867: ($curve->{'linestyle'} eq 'linespoints') ||
1868: ($curve->{'linestyle'} eq 'errorbars') ||
1869: ($curve->{'linestyle'} eq 'xerrorbars') ||
1870: ($curve->{'linestyle'} eq 'yerrorbars') ||
1871: ($curve->{'linestyle'} eq 'xyerrorbars')) {
1872: $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
1873: $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1874: } elsif ($curve->{'linestyle'} eq 'filledcurves') {
1875: $gnuplot_input.= ' '.$curve->{'limit'};
1876: } elsif ($curve->{'linetype'} ne '' &&
1877: $curve->{'linestyle'} eq 'lines') {
1878: $gnuplot_input.= ' linetype ';
1879: $gnuplot_input.= $linetypes{$curve->{'linetype'}};
1880: $gnuplot_input.= ' linecolor rgb "';
1881: # convert color from xaaaaaa to #aaaaaa
1882: $curve->{'color'} =~ s/^x/#/;
1883: $gnuplot_input.= $curve->{'color'}.'"';
1884: }
1885: $gnuplot_input.= ' linewidth '.$curve->{'linewidth'};
1886: }
1887: }
1888: # Write the output to a file.
1889: open (my $fh,">$tmpdir$filename.data");
1890: binmode($fh, ":utf8");
1891: print $fh $gnuplot_input;
1892: close($fh);
1893: # That's all folks.
1894: return ;
1895: }
1896:
1897: #---------------------------------------------- check_inputs
1898: sub check_inputs {
1899: ## Note: no inputs, no outputs - this acts only on global variables.
1900: ## Make sure we have all the input we need:
1901: if (! %Apache::lonplot::plot) { &set_defaults(\%Apache::lonplot::plot,\%gnuplot_defaults); }
1902: if (! %key ) {} # No key for this plot, thats okay
1903: # if (! %axis) { &set_defaults(\%axis,\%axis_defaults); }
1904: if (! defined($title )) {} # No title for this plot, thats okay
1905: if (! defined($xlabel)) {} # No xlabel for this plot, thats okay
1906: if (! defined($ylabel)) {} # No ylabel for this plot, thats okay
1907: if ($#labels < 0) { } # No labels for this plot, thats okay
1908: if ($#curves < 0) {
1909: &Apache::lonxml::warning("No curves specified for plot!!!!");
1910: return '';
1911: }
1912: my $curve;
1913: foreach $curve (@curves) {
1914: if (!defined($curve->{'function'})&&!defined($curve->{'data'})){
1915: &Apache::lonxml::warning("One of the curves specified did not contain any curve data or curve function declarations\n");
1916: return '';
1917: }
1918: }
1919: }
1920:
1921: #------------------------------------------------ make_edit
1922: sub edit_attributes {
1923: my ($target,$token,$defaults,$keys) = @_;
1924: my ($result,@keys);
1925: if ($keys && ref($keys) eq 'ARRAY') {
1926: @keys = @$keys;
1927: } else {
1928: @keys = sort(keys(%$defaults));
1929: }
1930: foreach my $attr (@keys) {
1931: # append a ' ' to the description if it doesn't have one already.
1932: my $description = $defaults->{$attr}->{'description'};
1933: $description .= ' ' if ($description !~ / $/);
1934: if ($defaults->{$attr}->{'edit_type'} eq 'entry') {
1935: $result .= &Apache::edit::text_arg
1936: ($description,$attr,$token,
1937: $defaults->{$attr}->{'size'},
1938: $defaults->{$attr}->{'class'});
1939: } elsif ($defaults->{$attr}->{'edit_type'} eq 'choice') {
1940: $result .= &Apache::edit::select_or_text_arg
1941: ($description,$attr,$defaults->{$attr}->{'choices'},$token);
1942: } elsif ($defaults->{$attr}->{'edit_type'} eq 'onoff') {
1943: $result .= &Apache::edit::select_or_text_arg
1944: ($description,$attr,['on','off'],$token);
1945: }
1946: $result .= '<br />';
1947: }
1948: return $result;
1949: }
1950:
1951:
1952: ###################################################################
1953: ## ##
1954: ## Insertion functions for editing plots ##
1955: ## ##
1956: ###################################################################
1957:
1958: sub insert_gnuplot {
1959: my $result = '';
1960: # plot attributes
1961: $result .= "\n<gnuplot ";
1962: foreach my $attr (keys(%gnuplot_defaults)) {
1963: $result .= "\n $attr=\"$gnuplot_defaults{$attr}->{'default'}\"";
1964: }
1965: $result .= ">";
1966: # Add the components (most are commented out for simplicity)
1967: # $result .= &insert_key();
1968: # $result .= &insert_axis();
1969: # $result .= &insert_title();
1970: # $result .= &insert_xlabel();
1971: # $result .= &insert_ylabel();
1972: $result .= &insert_curve();
1973: # close up the <gnuplot>
1974: $result .= "\n</gnuplot>";
1975: return $result;
1976: }
1977:
1978: sub insert_tics {
1979: my $result;
1980: $result .= &insert_xtics() . &insert_ytics;
1981: return $result;
1982: }
1983:
1984: sub insert_xtics {
1985: my $result;
1986: $result .= "\n <xtics ";
1987: foreach my $attr (keys(%tic_defaults)) {
1988: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
1989: }
1990: $result .= "/>";
1991: return $result;
1992: }
1993:
1994: sub insert_ytics {
1995: my $result;
1996: $result .= "\n <ytics ";
1997: foreach my $attr (keys(%tic_defaults)) {
1998: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
1999: }
2000: $result .= "/>";
2001: return $result;
2002: }
2003:
2004: sub insert_key {
2005: my $result;
2006: $result .= "\n <key ";
2007: foreach my $attr (keys(%key_defaults)) {
2008: $result .= "\n $attr=\"$key_defaults{$attr}->{'default'}\"";
2009: }
2010: $result .= " />";
2011: return $result;
2012: }
2013:
2014: sub insert_axis{
2015: my $result;
2016: $result .= "\n <axis ";
2017: foreach my $attr (keys(%axis_defaults)) {
2018: $result .= "\n $attr=\"$axis_defaults{$attr}->{'default'}\"";
2019: }
2020: $result .= " />";
2021: return $result;
2022: }
2023:
2024: sub insert_title { return "\n <title></title>"; }
2025: sub insert_xlabel { return "\n <xlabel></xlabel>"; }
2026: sub insert_ylabel { return "\n <ylabel></ylabel>"; }
2027:
2028: sub insert_label {
2029: my $result;
2030: $result .= "\n <label ";
2031: foreach my $attr (keys(%label_defaults)) {
2032: $result .= "\n $attr=\"".
2033: $label_defaults{$attr}->{'default'}."\"";
2034: }
2035: $result .= "></label>";
2036: return $result;
2037: }
2038:
2039: sub insert_curve {
2040: my $result;
2041: $result .= "\n <curve ";
2042: foreach my $attr (keys(%curve_defaults)) {
2043: $result .= "\n $attr=\"".
2044: $curve_defaults{$attr}->{'default'}."\"";
2045: }
2046: $result .= " >";
2047: $result .= &insert_data().&insert_data()."\n </curve>";
2048: }
2049:
2050: sub insert_function {
2051: my $result;
2052: $result .= "\n <function></function>";
2053: return $result;
2054: }
2055:
2056: sub insert_data {
2057: my $result;
2058: $result .= "\n <data></data>";
2059: return $result;
2060: }
2061:
2062: ##----------------------------------------------------------------------
2063: 1;
2064: __END__
2065:
2066:
2067: =head1 NAME
2068:
2069: Apache::lonplot.pm
2070:
2071: =head1 SYNOPSIS
2072:
2073: XML-based plotter of graphs
2074:
2075: This is part of the LearningOnline Network with CAPA project
2076: described at http://www.lon-capa.org.
2077:
2078:
2079: =head1 SUBROUTINES (parsing and edit rendering)
2080:
2081: =over
2082:
2083: =item start_gnuplot()
2084:
2085: =item end_gnuplot()
2086:
2087: =item start_xtics()
2088:
2089: =item end_xtics()
2090:
2091: =item start_ytics()
2092:
2093: =item end_ytics()
2094:
2095: =item get_font()
2096:
2097: =item start_key()
2098:
2099: =item end_key()
2100:
2101: =item parse_label()
2102:
2103: =item replace_entities()
2104:
2105: =item start_title()
2106:
2107: =item end_title()
2108:
2109: =item start_xlabel()
2110:
2111: =item end_xlabel()
2112:
2113: =item start_ylabel()
2114:
2115: =item end_label()
2116:
2117: =item start_curve()
2118:
2119: =item end_curve()
2120:
2121: =item start_function()
2122:
2123: =item end_function()
2124:
2125: =item start_data()
2126:
2127: =item end_data()
2128:
2129: =item start_axis()
2130:
2131: =item end_axis
2132:
2133: =back
2134:
2135: =head1 SUBROUTINES (Utility)
2136:
2137: =over
2138:
2139: =item set_defaults()
2140:
2141: =item get_attributes()
2142:
2143: =item write_gnuplot_file()
2144:
2145: =item check_inputs()
2146:
2147: =item edit_attributes()
2148:
2149: =back
2150:
2151: =head1 SUBROUTINES (Insertion functions for editing plots)
2152:
2153: =over
2154:
2155: =item insert_gnuplot()
2156:
2157: =item insert_tics()
2158:
2159: =item insert_xtics()
2160:
2161: =item insert_key()
2162:
2163: =item insert_axis()
2164:
2165: =item insert_title()
2166:
2167: =item insert_xlabel()
2168:
2169: =item insert_ylabel()
2170:
2171: =item insert_label()
2172:
2173: =item insert_curve()
2174:
2175: =item insert_function()
2176:
2177: =item insert_data()
2178:
2179: =back
2180:
2181: =cut
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