1: # The LearningOnline Network with CAPA
2: # Dynamic plot
3: #
4: # $Id: lonplot.pm,v 1.152.6.1 2014/07/09 15:17:32 raeburn Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28:
29:
30:
31:
32: package Apache::lonplot;
33:
34: use strict;
35: use warnings FATAL=>'all';
36: no warnings 'uninitialized';
37: use Apache::File;
38: use Apache::response;
39: use Apache::lonxml;
40: use Apache::edit;
41: use Apache::lonnet;
42: use LONCAPA;
43:
44:
45: use vars qw/$weboutputformat $version/;
46:
47:
48:
49: BEGIN {
50: &Apache::lonxml::register('Apache::lonplot',('gnuplot'));
51: #
52: # Determine the version of GNUPLOT
53: $weboutputformat = 'gif';
54: my $versionstring = `gnuplot --version 2>/dev/null`;
55: ($version) = ($versionstring =~ /^gnuplot ([\d.]+)/);
56: if ($version >= 4) {
57: $weboutputformat = 'png';
58: }
59:
60: }
61:
62:
63: =pod
64:
65: ##
66: ## Description of data structures:
67: ##
68: ## %plot %key %axis
69: ## --------------------------
70: ## height title color
71: ## width box xmin
72: ## bgcolor pos xmax
73: ## fgcolor ymin
74: ## transparent ymax
75: ## grid
76: ## border
77: ## font
78: ## align
79: ##
80: ## @labels: $labels[$i] = \%label
81: ## %label: text, xpos, ypos, justify
82: ##
83: ## @curves: $curves[$i] = \%curve
84: ## %curve: name, linestyle, ( function | data )
85: ##
86: ## $curves[$i]->{'data'} = [ [x1,x2,x3,x4],
87: ## [y1,y2,y3,y4] ]
88: ##
89:
90: ###################################################################
91: ## ##
92: ## Tests used in checking the validitity of input ##
93: ## ##
94: ###################################################################
95:
96: =cut
97:
98: my $max_str_len = 50; # if a label, title, xlabel, or ylabel text
99: # is longer than this, it will be truncated.
100:
101: my %linetypes =
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: },
181: fgcolor => {
182: default => 'x000000',
183: test => $color_test,
184: description => 'Foreground color of image (x000000)',
185: edit_type => 'entry',
186: size => '10'
187: },
188: transparent => {
189: default => 'off',
190: test => $onoff_test,
191: description => 'Transparent image',
192: edit_type => 'onoff'
193: },
194: grid => {
195: default => 'on',
196: test => $onoff_test,
197: description => 'Display grid',
198: edit_type => 'onoff'
199: },
200: gridlayer => {
201: default => 'off',
202: test => $onoff_test,
203: description => 'Display grid front layer over filled boxes or filled curves',
204: edit_type => 'onoff'
205: },
206: box_border => {
207: default => 'noborder',
208: test => sub {$_[0]=~/^(noborder|border)$/},
209: description => 'Draw border for boxes',
210: edit_type => 'choice',
211: choices => ['border','noborder']
212: },
213: border => {
214: default => 'on',
215: test => $onoff_test,
216: description => 'Draw border around plot',
217: edit_type => 'onoff'
218: },
219: font => {
220: default => '9',
221: test => $sml_test,
222: description => 'Font size to use in web output (pts)',
223: edit_type => 'choice',
224: choices => [['5','5 (small)'],'6','7','8',['9','9 (medium)'],'10',['11','11 (large)'],'12','15']
225: },
226: fontface => {
227: default => 'sans-serif',
228: test => sub {$_[0]=~/^(sans-serif|serif|classic)$/},
229: description => 'Type of font to use',
230: edit_type => 'choice',
231: choices => ['sans-serif','serif', 'classic']
232: },
233: samples => {
234: default => '100',
235: test => $int_test,
236: description => 'Number of samples for non-data plots',
237: edit_type => 'choice',
238: choices => ['100','200','500','1000','2000','5000']
239: },
240: align => {
241: default => 'middle',
242: test => sub {$_[0]=~/^(left|right|middle|center)$/},
243: description => 'Alignment for image in HTML',
244: edit_type => 'choice',
245: choices => ['left','right','middle']
246: },
247: texwidth => {
248: default => '93',
249: test => $int_test,
250: description => 'Width of plot when printed (mm)',
251: edit_type => 'entry',
252: size => '5'
253: },
254: texfont => {
255: default => '22',
256: test => $int_test,
257: description => 'Font size to use in TeX output (pts):',
258: edit_type => 'choice',
259: choices => [qw/8 10 12 14 16 18 20 22 24 26 28 30 32 34 36/],
260: },
261: plotcolor => {
262: default => 'monochrome',
263: test => sub {$_[0]=~/^(monochrome|color|colour)$/},
264: description => 'Color setting for printing:',
265: edit_type => 'choice',
266: choices => [qw/monochrome color colour/],
267: },
268: pattern => {
269: default => '',
270: test => $int_test,
271: description => 'Pattern value for boxes:',
272: edit_type => 'choice',
273: choices => [0,1,2,3,4,5,6]
274: },
275: solid => {
276: default => 0,
277: test => $real_test,
278: description => 'The density of fill style for boxes',
279: edit_type => 'entry',
280: size => '5'
281: },
282: fillstyle => {
283: default => 'empty',
284: test => sub {$_[0]=~/^(empty|solid|pattern)$/},
285: description => 'Filled style for boxes:',
286: edit_type => 'choice',
287: choices => ['empty','solid','pattern']
288: },
289: plottype => {
290: default => 'Cartesian',
291: test => sub {$_[0]=~/^(Polar|Cartesian)$/},
292: description => 'Plot type:',
293: edit_type => 'choice',
294: choices => ['Cartesian','Polar']
295: },
296: gridtype => {
297: default => 'Cartesian',
298: test => sub {$_[0]=~/^(Polar|Cartesian|Linear-Log|Log-Linear|Log-Log)$/},
299: description => 'Grid type:',
300: edit_type => 'choice',
301: choices => ['Cartesian','Polar','Linear-Log','Log-Linear','Log-Log']
302: },
303: lmargin => {
304: default => 'default',
305: test => sub {$_[0]=~/^(default|\d+)$/},
306: description => 'Left margin width (pts):',
307: edit_type => 'choice',
308: choices => $margin_choices,
309: },
310: rmargin => {
311: default => 'default',
312: test => sub {$_[0]=~/^(default|\d+)$/},
313: description => 'Right margin width (pts):',
314: edit_type => 'choice',
315: choices => $margin_choices,
316: },
317: tmargin => {
318: default => 'default',
319: test => sub {$_[0]=~/^(default|\d+)$/},
320: description => 'Top margin width (pts):',
321: edit_type => 'choice',
322: choices => $margin_choices,
323: },
324: bmargin => {
325: default => 'default',
326: test => sub {$_[0]=~/^(default|\d+)$/},
327: description => 'Bottom margin width (pts):',
328: edit_type => 'choice',
329: choices => $margin_choices,
330: },
331: boxwidth => {
332: default => '',
333: test => $real_test,
334: description => 'Width of boxes, default is auto',
335: edit_type => 'entry',
336: size => '5'
337: },
338: major_ticscale => {
339: default => '1',
340: test => $real_test,
341: description => 'Size of major tic marks (plot coordinates)',
342: edit_type => 'entry',
343: size => '5'
344: },
345: minor_ticscale => {
346: default => '0.5',
347: test => $real_test,
348: description => 'Size of minor tic mark (plot coordinates)',
349: edit_type => 'entry',
350: size => '5'
351: },
352: );
353:
354: my %key_defaults =
355: (
356: title => {
357: default => '',
358: test => $words_test,
359: description => 'Title of key',
360: edit_type => 'entry',
361: size => '40'
362: },
363: box => {
364: default => 'off',
365: test => $onoff_test,
366: description => 'Draw a box around the key?',
367: edit_type => 'onoff'
368: },
369: pos => {
370: default => 'top right',
371: test => $key_pos_test,
372: description => 'Position of the key on the plot',
373: edit_type => 'choice',
374: choices => ['top left','top right','bottom left','bottom right',
375: 'outside','below']
376: }
377: );
378:
379: my %label_defaults =
380: (
381: xpos => {
382: default => 0,
383: test => $real_test,
384: description => 'X position of label (graph coordinates)',
385: edit_type => 'entry',
386: size => '10'
387: },
388: ypos => {
389: default => 0,
390: test => $real_test,
391: description => 'Y position of label (graph coordinates)',
392: edit_type => 'entry',
393: size => '10'
394: },
395: justify => {
396: default => 'left',
397: test => sub {$_[0]=~/^(left|right|center)$/},
398: description => 'justification of the label text on the plot',
399: edit_type => 'choice',
400: choices => ['left','right','center']
401: },
402: rotate => {
403: default => 0,
404: test => $real_test,
405: description => 'Rotation of label (degrees)',
406: edit_type => 'entry',
407: size => '10',
408: }
409: );
410:
411: my @tic_edit_order = ('location','mirror','start','increment','end',
412: 'minorfreq');
413: my %tic_defaults =
414: (
415: location => {
416: default => 'border',
417: test => sub {$_[0]=~/^(border|axis)$/},
418: description => 'Location of major tic marks',
419: edit_type => 'choice',
420: choices => ['border','axis']
421: },
422: mirror => {
423: default => 'on',
424: test => $onoff_test,
425: description => 'Mirror tics on opposite axis?',
426: edit_type => 'onoff'
427: },
428: start => {
429: default => '-10.0',
430: test => $real_test,
431: description => 'Start major tics at',
432: edit_type => 'entry',
433: size => '10'
434: },
435: increment => {
436: default => '1.0',
437: test => $real_test,
438: description => 'Place a major tic every',
439: edit_type => 'entry',
440: size => '10'
441: },
442: end => {
443: default => ' 10.0',
444: test => $real_test,
445: description => 'Stop major tics at ',
446: edit_type => 'entry',
447: size => '10'
448: },
449: minorfreq => {
450: default => '0',
451: test => $int_test,
452: description => 'Number of minor tics per major tic mark',
453: edit_type => 'entry',
454: size => '10'
455: },
456: );
457:
458: my @axis_edit_order = ('color','xmin','xmax','ymin','ymax','xformat', 'yformat', 'xzero', 'yzero');
459: my %axis_defaults =
460: (
461: color => {
462: default => 'x000000',
463: test => $color_test,
464: description => 'Color of grid lines (x000000)',
465: edit_type => 'entry',
466: size => '10'
467: },
468: xmin => {
469: default => '-10.0',
470: test => $real_test,
471: description => 'Minimum x-value shown in plot',
472: edit_type => 'entry',
473: size => '10'
474: },
475: xmax => {
476: default => ' 10.0',
477: test => $real_test,
478: description => 'Maximum x-value shown in plot',
479: edit_type => 'entry',
480: size => '10'
481: },
482: ymin => {
483: default => '-10.0',
484: test => $real_test,
485: description => 'Minimum y-value shown in plot',
486: edit_type => 'entry',
487: size => '10'
488: },
489: ymax => {
490: default => ' 10.0',
491: test => $real_test,
492: description => 'Maximum y-value shown in plot',
493: edit_type => 'entry',
494: size => '10'
495: },
496: xformat => {
497: default => 'on',
498: test => sub {$_[0]=~/^(on|off|\d+(f|F|e|E))$/},
499: description => 'X-axis number formatting',
500: edit_type => 'choice',
501: choices => ['on', 'off', '2e', '2f'],
502: },
503: yformat => {
504: default => 'on',
505: test => sub {$_[0]=~/^(on|off|\d+(f|F|e|E))$/},
506: description => 'Y-axis number formatting',
507: edit_type => 'choice',
508: choices => ['on', 'off', '2e', '2f'],
509: },
510:
511: xzero => {
512: default => 'off',
513: test => sub {$_[0]=~/^(off|line|thick-line|dotted)$/},
514: description => 'Show x-zero (y=0) axis',
515: edit_type => 'choice',
516: choices => ['off', 'line', 'thick-line', 'dotted'],
517: },
518:
519: yzero => {
520: default => 'off',
521: test => sub {$_[0]=~/^(off|line|thick-line|dotted)$/},
522: description => 'Show y-zero (x=0) axis',
523: edit_type => 'choice',
524: choices => ['off', 'line', 'thick-line', 'dotted'],
525: },
526: );
527:
528: my @curve_edit_order = ('color','name','linestyle','linewidth','linetype','pointtype','pointsize','limit');
529:
530: my %curve_defaults =
531: (
532: color => {
533: default => 'x000000',
534: test => $color_test,
535: description => 'Color of curve (x000000)',
536: edit_type => 'entry',
537: size => '10'
538: },
539: name => {
540: default => '',
541: test => $words_test,
542: description => 'Name of curve to appear in key',
543: edit_type => 'entry',
544: size => '20'
545: },
546: linestyle => {
547: default => 'lines',
548: test => $linestyle_test,
549: description => 'Plot with:',
550: edit_type => 'choice',
551: choices => [keys(%linestyles)]
552: },
553: linewidth => {
554: default => 1,
555: test => $int_test,
556: description => 'Line width (may not apply to all plot styles)',
557: edit_type => 'choice',
558: choices => [1,2,3,4,5,6,7,8,9,10]
559: },
560: linetype => {
561: default => 'solid',
562: test => sub {$_[0]=~/^(solid|dashed)$/},
563: description => 'Line type (may not apply to all plot styles)',
564: edit_type => 'choice',
565: choices => ['solid', 'dashed']
566: },
567: pointsize => {
568: default => 1,
569: test => $pos_real_test,
570: description => 'Point size (may not apply to all plot styles)',
571: edit_type => 'entry',
572: size => '5'
573: },
574: pointtype => {
575: default => 1,
576: test => $int_test,
577: description => 'Point type (may not apply to all plot styles)',
578: edit_type => 'choice',
579: choices => [0,1,2,3,4,5,6]
580: },
581: limit => {
582: default => 'closed',
583: test => sub {$_[0]=~/^(above|below|closed|x1|x2|y1|y2)$/},
584: description => 'Point to fill -- for filledcurves',
585: edit_type => 'choice',
586: choices => ['above', 'below', 'closed','x1','x2','y1','y2']
587: },
588: );
589:
590: ###################################################################
591: ## ##
592: ## parsing and edit rendering ##
593: ## ##
594: ###################################################################
595:
596: undef %Apache::lonplot::plot;
597: my (%key,%axis,$title,$xlabel,$ylabel,@labels,@curves,%xtics,%ytics);
598:
599: sub start_gnuplot {
600: undef(%Apache::lonplot::plot); undef(%key); undef(%axis);
601: undef($title); undef($xlabel); undef($ylabel);
602: undef(@labels); undef(@curves);
603: undef(%xtics); undef(%ytics);
604: #
605: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
606: my $result='';
607: &Apache::lonxml::register('Apache::lonplot',
608: ('title','xlabel','ylabel','key','axis','label','curve',
609: 'xtics','ytics'));
610: push (@Apache::lonxml::namespace,'lonplot');
611: if ($target eq 'web' || $target eq 'tex') {
612: &get_attributes(\%Apache::lonplot::plot,\%gnuplot_defaults,$parstack,$safeeval,
613: $tagstack->[-1]);
614: } elsif ($target eq 'edit') {
615: $result .= &Apache::edit::tag_start($target,$token,'GnuPlot');
616: $result .= &edit_attributes($target,$token,\%gnuplot_defaults,
617: \@gnuplot_edit_order)
618: .&Apache::edit::end_row()
619: .&Apache::edit::start_spanning_row();
620: } elsif ($target eq 'modified') {
621: my $constructtag=&Apache::edit::get_new_args
622: ($token,$parstack,$safeeval,keys(%gnuplot_defaults));
623: if ($constructtag) {
624: $result = &Apache::edit::rebuild_tag($token);
625: }
626: }
627: return $result;
628: }
629:
630: sub end_gnuplot {
631: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
632: pop @Apache::lonxml::namespace;
633: &Apache::lonxml::deregister('Apache::lonplot',
634: ('title','xlabel','ylabel','key','axis','label','curve'));
635: my $result = '';
636: my $randnumber;
637: # need to call rand everytime start_script would evaluate, as the
638: # safe space rand number generator and the global rand generator
639: # are not separate
640: if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
641: $target eq 'answer') {
642: $randnumber=int(rand(1000));
643: }
644: if ($target eq 'web' || $target eq 'tex') {
645: &check_inputs(); # Make sure we have all the data we need
646: ##
647: ## Determine filename
648: my $tmpdir = '/home/httpd/perl/tmp/';
649: my $filename = $env{'user.name'}.'_'.$env{'user.domain'}.
650: '_'.time.'_'.$$.$randnumber.'_plot';
651: ## Write the plot description to the file
652: &write_gnuplot_file($tmpdir,$filename,$target);
653: $filename = &escape($filename);
654: ## return image tag for the plot
655: if ($target eq 'web') {
656: $result .= <<"ENDIMAGE";
657: <img src = "/cgi-bin/plot.$weboutputformat?file=$filename.data"
658: width = "$Apache::lonplot::plot{'width'}"
659: height = "$Apache::lonplot::plot{'height'}"
660: align = "$Apache::lonplot::plot{'align'}"
661: alt = "$Apache::lonplot::plot{'alttag'}" />
662: ENDIMAGE
663: } elsif ($target eq 'tex') {
664: &Apache::lonxml::debug(" gnuplot wid = $Apache::lonplot::plot{'width'}");
665: &Apache::lonxml::debug(" gnuplot ht = $Apache::lonplot::plot{'height'}");
666: #might be inside the safe space, register the URL for later
667: &Apache::lonxml::register_ssi("/cgi-bin/plot.gif?file=$filename.data&output=eps");
668: $result = "%DYNAMICIMAGE:$Apache::lonplot::plot{'width'}:$Apache::lonplot::plot{'height'}:$Apache::lonplot::plot{'texwidth'}\n";
669: $result .= '\graphicspath{{/home/httpd/perl/tmp/}}'."\n";
670: $result .= '\includegraphics[width='.$Apache::lonplot::plot{'texwidth'}.' mm]{'.&unescape($filename).'.eps}';
671: }
672: } elsif ($target eq 'edit') {
673: $result.=&Apache::edit::tag_end($target,$token);
674: }
675: return $result;
676: }
677:
678:
679: ##--------------------------------------------------------------- xtics
680: sub start_xtics {
681: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
682: my $result='';
683: if ($target eq 'web' || $target eq 'tex') {
684: &get_attributes(\%xtics,\%tic_defaults,$parstack,$safeeval,
685: $tagstack->[-1]);
686: } elsif ($target eq 'edit') {
687: $result .= &Apache::edit::tag_start($target,$token,'xtics');
688: $result .= &edit_attributes($target,$token,\%tic_defaults,
689: \@tic_edit_order);
690: } elsif ($target eq 'modified') {
691: my $constructtag=&Apache::edit::get_new_args
692: ($token,$parstack,$safeeval,keys(%tic_defaults));
693: if ($constructtag) {
694: $result = &Apache::edit::rebuild_tag($token);
695: }
696: }
697: return $result;
698: }
699:
700: sub end_xtics {
701: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
702: my $result = '';
703: if ($target eq 'web' || $target eq 'tex') {
704: } elsif ($target eq 'edit') {
705: $result.=&Apache::edit::tag_end($target,$token);
706: }
707: return $result;
708: }
709:
710: ##--------------------------------------------------------------- ytics
711: sub start_ytics {
712: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
713: my $result='';
714: if ($target eq 'web' || $target eq 'tex') {
715: &get_attributes(\%ytics,\%tic_defaults,$parstack,$safeeval,
716: $tagstack->[-1]);
717: } elsif ($target eq 'edit') {
718: $result .= &Apache::edit::tag_start($target,$token,'ytics');
719: $result .= &edit_attributes($target,$token,\%tic_defaults,
720: \@tic_edit_order);
721: } elsif ($target eq 'modified') {
722: my $constructtag=&Apache::edit::get_new_args
723: ($token,$parstack,$safeeval,keys(%tic_defaults));
724: if ($constructtag) {
725: $result = &Apache::edit::rebuild_tag($token);
726: }
727: }
728: return $result;
729: }
730:
731: sub end_ytics {
732: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
733: my $result = '';
734: if ($target eq 'web' || $target eq 'tex') {
735: } elsif ($target eq 'edit') {
736: $result.=&Apache::edit::tag_end($target,$token);
737: }
738: return $result;
739: }
740:
741: ##-----------------------------------------------------------------font
742: my %font_properties =
743: (
744: 'classic' => {
745: face => 'classic',
746: file => 'DejaVuSansMono-Bold',
747: printname => 'Helvetica',
748: tex_no_file => 1,
749: },
750: 'sans-serif' => {
751: face => 'sans-serif',
752: file => 'DejaVuSans',
753: printname => 'DejaVuSans',
754: },
755: 'serif' => {
756: face => 'serif',
757: file => 'DejaVuSerif',
758: printname => 'DejaVuSerif',
759: },
760: );
761:
762: sub get_font {
763: my ($target) = @_;
764: my ($size, $selected_font);
765:
766: if ( $Apache::lonplot::plot{'font'} =~ /^(small|medium|large)/) {
767: $selected_font = $font_properties{'classic'};
768: if ( $Apache::lonplot::plot{'font'} eq 'small') {
769: $size = '5';
770: } elsif ( $Apache::lonplot::plot{'font'} eq 'medium') {
771: $size = '9';
772: } elsif ( $Apache::lonplot::plot{'font'} eq 'large') {
773: $size = '11';
774: } else {
775: $size = '9';
776: }
777: } else {
778: $size = $Apache::lonplot::plot{'font'};
779: $selected_font = $font_properties{$Apache::lonplot::plot{'fontface'}};
780: }
781: if ($target eq 'tex' && defined($Apache::lonplot::plot{'texfont'})) {
782: # $selected_font = $font_properties{'classic'};
783: $size = $Apache::lonplot::plot{'texfont'};
784: }
785: return ($size, $selected_font);
786: }
787:
788: ##----------------------------------------------------------------- key
789: sub start_key {
790: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
791: my $result='';
792: if ($target eq 'web' || $target eq 'tex') {
793: &get_attributes(\%key,\%key_defaults,$parstack,$safeeval,
794: $tagstack->[-1]);
795: } elsif ($target eq 'edit') {
796: $result .= &Apache::edit::tag_start($target,$token,'Plot Key');
797: $result .= &edit_attributes($target,$token,\%key_defaults);
798: } elsif ($target eq 'modified') {
799: my $constructtag=&Apache::edit::get_new_args
800: ($token,$parstack,$safeeval,keys(%key_defaults));
801: if ($constructtag) {
802: $result = &Apache::edit::rebuild_tag($token);
803: }
804: }
805: return $result;
806: }
807:
808: sub end_key {
809: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
810: my $result = '';
811: if ($target eq 'web' || $target eq 'tex') {
812: } elsif ($target eq 'edit') {
813: $result.=&Apache::edit::tag_end($target,$token);
814: }
815: return $result;
816: }
817:
818: sub parse_label {
819: my ($target,$text) = @_;
820: my $parser=HTML::LCParser->new(\$text);
821: my $result;
822: while (my $token=$parser->get_token) {
823: if ($token->[0] eq 'S') {
824: if ($token->[1] eq 'sub') {
825: $result .= '_{';
826: } elsif ($token->[1] eq 'sup') {
827: $result .= '^{';
828: } else {
829: $result .= $token->[4];
830: }
831: } elsif ($token->[0] eq 'E') {
832: if ($token->[1] eq 'sub'
833: || $token->[1] eq 'sup') {
834: $result .= '}';
835: } else {
836: $result .= $token->[2];
837: }
838: } elsif ($token->[0] eq 'T') {
839: $result .= &replace_entities($target,$token->[1]);
840: }
841: }
842: return $result;
843: }
844:
845: #
846: # Note that there are severe restrictions on font selection in the
847: # ps driver now. later in life Gnuplot is supposed to support
848: # utf-8 fonts in the posts script driver. When this happens,
849: # the tex entries with comments that include the word <FIX>
850: # should be changed to print the correct glyphs rather than some
851: # approximation or fallback of what is intended.
852:
853: my %lookup =
854: ( # Greek alphabet:
855:
856: '(Alpha|#913)' => {'tex' => '{/Symbol A}', 'web' => "\x{391}"},
857: '(Beta|#914)' => {'tex' => '{/Symbol B}', 'web' => "\x{392}"},
858: '(Chi|#935)' => {'tex' => '{/Symbol C}', 'web' => "\x{3A7}"},
859: '(Delta|#916)' => {'tex' => '{/Symbol D}', 'web' => "\x{394}"},
860: '(Epsilon|#917)' => {'tex' => '{/Symbol E}', 'web' => "\x{395}"},
861: '(Phi|#934)' => {'tex' => '{/Symbol F}', 'web' => "\x{3A6}"},
862: '(Gamma|#915)' => {'tex' => '{/Symbol G}', 'web' => "\x{393}"},
863: '(Eta|#919)' => {'tex' => '{/Symbol H}', 'web' => "\x{397}"},
864: '(Iota|#921)' => {'tex' => '{/Symbol I}', 'web' => "\x{399}"},
865: '(Kappa|#922)' => {'tex' => '{/Symbol K}', 'web' => "\x{39A}"},
866: '(Lambda|#923)' => {'tex' => '{/Symbol L}', 'web' => "\x{39B}"},
867: '(Mu|#924)' => {'tex' => '{/Symbol M}', 'web' => "\x{39C}"},
868: '(Nu|#925)' => {'tex' => '{/Symbol N}', 'web' => "\x{39D}"},
869: '(Omicron|#927)' => {'tex' => '{/Symbol O}', 'web' => "\x{39F}"},
870: '(Pi|#928)' => {'tex' => '{/Symbol P}', 'web' => "\x{3A0}"},
871: '(Theta|#920)' => {'tex' => '{/Symbol Q}', 'web' => "\x{398}"},
872: '(Rho|#929)' => {'tex' => '{/Symbol R}', 'web' => "\x{3A1}"},
873: '(Sigma|#931)' => {'tex' => '{/Symbol S}', 'web' => "\x{3A3}"},
874: '(Tau|#932)' => {'tex' => '{/Symbol T}', 'web' => "\x{3A4}"},
875: '(Upsilon|#933)' => {'tex' => '{/Symbol U}', 'web' => "\x{3A5}"},
876: '(Omega|#937)' => {'tex' => '{/Symbol W}', 'web' => "\x{3A9}"},
877: '(Xi|#926)' => {'tex' => '{/Symbol X}', 'web' => "\x{39E}"},
878: '(Psi|#936)' => {'tex' => '{/Symbol Y}', 'web' => "\x{3A8}"},
879: '(Zeta|#918)' => {'tex' => '{/Symbol Z}', 'web' => "\x{396}"},
880: '(alpha|#945)' => {'tex' => '{/Symbol a}', 'web' => "\x{3B1}"},
881: '(beta|#946)' => {'tex' => '{/Symbol b}', 'web' => "\x{3B2}"},
882: '(chi|#967)' => {'tex' => '{/Symbol c}', 'web' => "\x{3C7}"},
883: '(delta|#948)' => {'tex' => '{/Symbol d}', 'web' => "\x{3B4}"},
884: '(epsilon|#949)' => {'tex' => '{/Symbol e}', 'web' => "\x{3B5}"},
885: '(phi|#966)' => {'tex' => '{/Symbol f}', 'web' => "\x{3C6}"},
886: '(gamma|#947)' => {'tex' => '{/Symbol g}', 'web' => "\x{3B3}"},
887: '(eta|#951)' => {'tex' => '{/Symbol h}', 'web' => "\x{3B7}"},
888: '(iota|#953)' => {'tex' => '{/Symbol i}', 'web' => "\x{3B9}"},
889: '(kappa|#954)' => {'tex' => '{/Symbol k}', 'web' => "\x{3BA}"},
890: '(lambda|#955)' => {'tex' => '{/Symbol k}', 'web' => "\x{3BB}"},
891: '(mu|#956)' => {'tex' => '{/Symbol m}', 'web' => "\x{3BC}"},
892: '(nu|#957)' => {'tex' => '{/Symbol n}', 'web' => "\x{3BD}"},
893: '(omicron|#959)' => {'tex' => '{/Symbol o}', 'web' => "\x{3BF}"},
894: '(pi|#960)' => {'tex' => '{/Symbol p}', 'web' => "\x{3C0}"},
895: '(theta|#952)' => {'tex' => '{/Symbol q}', 'web' => "\x{3B8}"},
896: '(rho|#961)' => {'tex' => '{/Symbol r}', 'web' => "\x{3C1}"},
897: '(sigma|#963)' => {'tex' => '{/Symbol s}', 'web' => "\x{3C3}"},
898: '(tau|#964)' => {'tex' => '{/Symbol t}', 'web' => "\x{3C4}"},
899: '(upsilon|#965)' => {'tex' => '{/Symbol u}', 'web' => "\x{3C5}"},
900: '(omega|#969)' => {'tex' => '{/Symbol w}', 'web' => "\x{3C9}"},
901: '(xi|#958)' => {'tex' => '{/Symbol x}', 'web' => "\x{3BE}"},
902: '(psi|#968)' => {'tex' => '{/Symbol y}', 'web' => "\x{3C8}"},
903: '(zeta|#950)' => {'tex' => '{/Symbol z}', 'web' => "\x{3B6}"},
904: '(thetasym|#977)' => {'tex' => '{/Symbol \165}', 'web' => "\x{3d1}"},
905: '(upsih|#978)' => {'tex' => '{/Symbol \241}', 'web' => "\x{3d2}"},
906: '(piv|#982)' => {'tex' => '{/Symbol \166}', 'web' => "\x{3d6}"},
907:
908:
909: # Punctuation:
910:
911: '(quot|#034)' => {'tex' => '\42', 'web' => '\42'},
912: '(amp|#038)' => {'tex' => '\46', 'web' => '\46'},
913: '(lt|#060)' => {'tex' => '\74', 'web' => '\74'},
914: '(gt|#062)' => {'tex' => '\76', 'web' => '\76'},
915: '#131' => {'tex' => '{/Symbol \246}', 'web' => "\x{192}"},
916: '#132' => {'tex' => '{/Text \271}', 'web' => "\x{201e}"},
917: '#133' => {'tex' => '{/Symbol \274}', 'web'=> "\x{2026}"},
918: '#134' => {'tex' => '{/Text \262}', 'web' => "\x{2020}"},
919: '#135' => {'tex' => '{/Text \263}', 'web' => "\x{2021}"},
920: '#136' => {'tex' => '\\\\^', 'web' => '\\\\^'},
921: '#137' => {'tex' => '%o', 'web' => "\x{2030}"}, # Per Mille <FIX>
922: '#138' => {'tex' => 'S', 'web' => "\x{160}"}, # S-Caron <FIX>
923: '#139' => {'tex' => '<', 'web' => '<'},
924: '#140' => {'tex' => 'AE', 'web' => "\x{152}"}, # AE ligature <FIX>
925: '#145' => {'tex' => '\140', 'web' => "\x{2018}"},
926: '#146' => {'tex' => '\47', 'web' => "\x{2019}"},
927: '#147' => {'tex' => '\140\140', 'web' => "\x{201c}"}, # Left " <FIX>
928: '#148' => {'tex' => '\47\47', 'web' => '\\"'}, # Right " <FIX>
929: '#149' => {'tex' => '{/Symbol \267}', 'web' => "\x{2022}"},
930: '#150' => {'tex' => '{/Text \55}', 'web' => "\x{2013}"}, # en dash
931: '#151' => {'tex' => '{/Symbol \55}', 'web' => "\x{2014}"}, # em dash
932: '#152' => {'tex' => '\\\\~', 'web' => '\\\\~'},
933: '#153' => {'tex' => '{/Symbol \324}', 'web' => "\x{2122}"}, # trademark
934:
935: # Accented letters, and other furreign language glyphs.
936:
937: '#154' => {'tex' => 's', 'web' => "\x{161}"}, # small s-caron no ps.
938: '#155' => {'tex' => '>', 'web' => '\76'}, # >
939: '#156' => {'tex' => '{/Text \366}', 'web' => "\x{153}"}, # oe ligature.<FIX>
940: '#159', => {'tex' => 'Y', 'web' => "\x{178}"}, # Y-umlaut - can't print <FIX>
941: '(nbsp|#160)' => {'tex' => ' ', 'web' => ' '}, # non breaking space.
942: '(iexcl|#161)' => {'tex' => '{/Text \241}', 'web' => "\x{a1}"}, # inverted !
943: '(cent|#162)' => {'tex' => '{/Text \242}', 'web' => "\x{a2}"}, # Cent currency.
944: '(pound|#163)' => {'tex' => '{/Text \243}', 'web' => "\x{a3}"}, # GB Pound currency.
945: '(curren|#164)' => {'tex' => '{/ZapfDingbats \161}','web' => "\x{a4}"}, # Generic currency symb. <FIX>
946: '(yen|#165)' => {'tex' => '{/Text \245}', 'web' => "\x{a5}"}, # Yen currency.
947: '(brvbar|#166)' => {'tex' => '{/Symbol \174}', 'web' => "\x{a6}"}, # Broken vert bar no print.
948: '(sect|#167)' => {'tex' => '{\247}', 'web' => "\x{a7}"}, # Section symbol.
949: '(uml|#168)' => {'tex' => '{\250}', 'web' => "\x{a8}"}, # 'naked' umlaut.
950: '(copy|#169)' => {'tex' => '{/Symbol \343}', 'web' => "\x{a9}"}, # Copyright symbol.
951: '(ordf|#170)' => {'tex' => '{/Text \343}', 'web' => "\x{aa}"}, # Feminine ordinal.
952: '(laquo|#171)' => {'tex' => '{/Text \253}', 'web' => "\x{ab}"}, # << quotes.
953: '(not|#172)' => {'tex' => '\254', 'web' => "\x{ac}"}, # Logical not.
954: '(shy|#173)' => {'tex' => '\255', 'web' => "\x{ad}"}, # soft hyphen.
955: '(reg|#174)' => {'tex' => '{/Symbol \342}', 'web' => "\x{ae}"}, # Registered tm.
956: '(macr|#175)' => {'tex' => '^{\255}', 'web' => "\x{af}"}, # 'naked' macron (overbar).
957: '(deg|#176)' => {'tex' => '{/Text \260}', 'web' => "\x{b0}"}, # Degree symbo..`
958: '(plusmn|#177)' => {'tex' => '{/Symbol \261}', 'web' => "\x{b1}"}, # +/- symbol.
959: '(sup2|#178)' => {'tex' => '^2', 'web' => "\x{b2}"}, # Superscript 2.
960: '(sup3|#179)' => {'tex' => '^3', 'web' => "\x{b3}"}, # Superscript 3.
961: '(acute|#180)' => {'tex' => '{/Text \222}', 'web' => "\x{b4}"}, # 'naked' acute accent.
962: '(micro|#181)' => {'tex' => '{/Symbol \155}', 'web' => "\x{b5}"}, # Micro (small mu).
963: '(para|#182)' => {'tex' => '{/Text \266}', 'web' => "\x{b6}"}, # Paragraph symbol.
964: '(middot|#183)' => {'tex' => '\267', 'web' => "\x{b7}"}, # middle dot
965: '(cedil|#184)' => {'tex' => '\233', 'web' => "\x{b8}"}, # 'naked' cedilla.
966: '(sup1|#185)' => {'tex' => '^1', 'web' => "\x{b9}"}, # superscript 1.
967: '(ordm|#186)' => {'tex' => '{\260}', 'web' => "\x{ba}"}, # masculine ordinal.
968: '(raquo|#187)', => {'tex' => '\273', 'web' => "\x{bb}"}, # Right angle quotes.
969: '(frac14|#188)' => {'tex' => '\274', 'web' => "\x{bc}"}, # 1/4.
970: '(frac12|#189)' => {'tex' => '\275', 'web' => "\x{bd}"}, # 1/2.
971: '(frac34|#190)' => {'tex' => '\276', 'web' => "\x{be}"}, # 3/4
972: '(iquest|#191)' => {'tex' => '{/Text \277}', 'web' => "\x{bf}"}, # Inverted ?
973: '(Agrave|#192)' => {'tex' => '\300', 'web' => "\x{c0}"}, # A Grave.
974: '(Aacute|#193)' => {'tex' => '\301', 'web' => "\x{c1}"}, # A Acute.
975: '(Acirc|#194)' => {'tex' => '\302', 'web' => "\x{c2}"}, # A Circumflex.
976: '(Atilde|#195)' => {'tex' => '\303', 'web' => "\x{c3}"}, # A tilde.
977: '(Auml|#196)' => {'tex' => '\304', 'web' => "\x{c4}"}, # A umlaut.
978: '(Aring|#197)' => {'tex' => '\305', 'web' => "\x{c5}"}, # A ring.
979: '(AElig|#198)' => {'tex' => '\306', 'web' => "\x{c6}"}, # AE ligature.
980: '(Ccedil|#199)' => {'tex' => '\307', 'web' => "\x{c7}"}, # C cedilla
981: '(Egrave|#200)' => {'tex' => '\310', 'web' => "\x{c8}"}, # E Accent grave.
982: '(Eacute|#201)' => {'tex' => '\311', 'web' => "\x{c9}"}, # E acute accent.
983: '(Ecirc|#202)' => {'tex' => '\312', 'web' => "\x{ca}"}, # E Circumflex.
984: '(Euml|#203)' => {'tex' => '\313', 'web' => "\x{cb}"}, # E umlaut.
985: '(Igrave|#204)' => {'tex' => '\314', 'web' => "\x{cc}"}, # I grave accent.
986: '(Iacute|#205)' => {'tex' => '\315', 'web' => "\x{cd}"}, # I acute accent.
987: '(Icirc|#206)' => {'tex' => '\316', 'web' => "\x{ce}"}, # I circumflex.
988: '(Iuml|#207)' => {'tex' => '\317', 'web' => "\x{cf}"}, # I umlaut.
989: '(ETH|#208)' => {'tex' => '\320', 'web' => "\x{d0}"}, # Icelandic Cap eth.
990: '(Ntilde|#209)' => {'tex' => '\321', 'web' => "\x{d1}"}, # Ntilde (enyan).
991: '(Ograve|#210)' => {'tex' => '\322', 'web' => "\x{d2}"}, # O accent grave.
992: '(Oacute|#211)' => {'tex' => '\323', 'web' => "\x{d3}"}, # O accent acute.
993: '(Ocirc|#212)' => {'tex' => '\324', 'web' => "\x{d4}"}, # O circumflex.
994: '(Otilde|#213)' => {'tex' => '\325', 'web' => "\x{d5}"}, # O tilde.
995: '(Ouml|#214)' => {'tex' => '\326', 'web' => "\x{d6}"}, # O umlaut.
996: '(times|#215)' => {'tex' => '\327', 'web' => "\x{d7}"}, # Times symbol.
997: '(Oslash|#216)' => {'tex' => '\330', 'web' => "\x{d8}"}, # O slash.
998: '(Ugrave|#217)' => {'tex' => '\331', 'web' => "\x{d9}"}, # U accent grave.
999: '(Uacute|#218)' => {'tex' => '\332', 'web' => "\x{da}"}, # U accent acute.
1000: '(Ucirc|#219)' => {'tex' => '\333', 'web' => "\x{db}"}, # U circumflex.
1001: '(Uuml|#220)' => {'tex' => '\334', 'web' => "\x{dc}"}, # U umlaut.
1002: '(Yacute|#221)' => {'tex' => '\335', 'web' => "\x{dd}"}, # Y accent acute.
1003: '(THORN|#222)' => {'tex' => '\336', 'web' => "\x{de}"}, # Icelandic thorn.
1004: '(szlig|#223)' => {'tex' => '\337', 'web' => "\x{df}"}, # German sharfes s.
1005: '(agrave|#224)' => {'tex' => '\340', 'web' => "\x{e0}"}, # a accent grave.
1006: '(aacute|#225)' => {'tex' => '\341', 'web' => "\x{e1}"}, # a grave.
1007: '(acirc|#226)' => {'tex' => '\342', 'web' => "\x{e2}"}, # a circumflex.
1008: '(atilde|#227)' => {'tex' => '\343', 'web' => "\x{e3}"}, # a tilde.
1009: '(auml|#228)' => {'tex' => '\344', 'web' => "\x{e4}"}, # a umlaut
1010: '(aring|#229)' => {'tex' => '\345', 'web' => "\x{e5}"}, # a ring on top.
1011: '(aelig|#230)' => {'tex' => '\346', 'web' => "\x{e6}"}, # ae ligature.
1012: '(ccedil|#231)' => {'tex' => '\347', 'web' => "\x{e7}"}, # C cedilla
1013: '(egrave|#232)' => {'tex' => '\350', 'web' => "\x{e8}"}, # e accent grave.
1014: '(eacute|#233)' => {'tex' => '\351', 'web' => "\x{e9}"}, # e accent acute.
1015: '(ecirc|#234)' => {'tex' => '\352', 'web' => "\x{ea}" }, # e circumflex.
1016: '(euml|#235)' => {'tex' => '\353', 'web' => "\x{eb}"}, # e umlaut.
1017: '(igrave|#236)' => {'tex' => '\354', 'web' => "\x{ec}"}, # i grave.
1018: '(iacute|#237)' => {'tex' => '\355', 'web' => "\x{ed}"}, # i acute.
1019: '(icirc|#238)' => {'tex' => '\356', 'web' => "\x{ee}"}, # i circumflex.
1020: '(iuml|#239)' => {'tex' => '\357', 'web' => "\x{ef}"}, # i umlaut.
1021: '(eth|#240)' => {'tex' => '\360', 'web' => "\x{f0}"}, # Icelandic eth.
1022: '(ntilde|#241)' => {'tex' => '\361', 'web' => "\x{f1}"}, # n tilde.
1023: '(ograve|#242)' => {'tex' => '\362', 'web' => "\x{f2}"}, # o grave.
1024: '(oacute|#243)' => {'tex' => '\363', 'web' => "\x{f3}"}, # o acute.
1025: '(ocirc|#244)' => {'tex' => '\364', 'web' => "\x{f4}"}, # o circumflex.
1026: '(otilde|#245)' => {'tex' => '\365', 'web' => "\x{f5}"}, # o tilde.
1027: '(ouml|#246)' => {'tex' => '\366', 'web' => "\x{f6}"}, # o umlaut.
1028: '(divide|#247)' => {'tex' => '\367', 'web' => "\x{f7}"}, # division symbol
1029: '(oslash|#248)' => {'tex' => '\370', 'web' => "\x{f8}"}, # o slashed.
1030: '(ugrave|#249)' => {'tex' => '\371', 'web' => "\x{f9}"}, # u accent grave.
1031: '(uacute|#250)' => {'tex' => '\372', 'web' => "\x{fa}"}, # u acute.
1032: '(ucirc|#251)' => {'tex' => '\373', 'web' => "\x{fb}"}, # u circumflex.
1033: '(uuml|#252)' => {'tex' => '\374', 'web' => "\x{fc}"}, # u umlaut.
1034: '(yacute|#253)' => {'tex' => '\375', 'web' => "\x{fd}"}, # y acute accent.
1035: '(thorn|#254)' => {'tex' => '\376', 'web' => "\x{fe}"}, # small thorn (icelandic).
1036: '(yuml|#255)' => {'tex' => '\377', 'web' => "\x{ff}"}, # y umlaut.
1037:
1038: # Latin extended A entities:
1039:
1040: '(OElig|#338)' => {'tex' => '{/Text \326}', 'web' => "\x{152}"}, # OE ligature.
1041: '(oelig|#339)' => {'tex' => '{/Text \366}', 'web' => "\x{153}"}, # oe ligature.
1042: '(Scaron|#352)' => {'tex' => 'S', 'web' => "\x{160}"}, # S caron no printable.
1043: '(scaron|#353)' => {'tex' => 's', 'web' => "\x{161}"}, # s caron no printable.
1044: '(Yuml|#376)' => {'tex' => 'Y', 'web' => "\x{178}"}, # Y umlaut - no printable.
1045:
1046: # Latin extended B.
1047:
1048: '(fnof|#402)' => {'tex' =>'{/Symbol \246}', 'web' => "\x{192}"}, # f with little hook.
1049:
1050: # Standalone accents:
1051:
1052: '(circ|#710)' => {'tex' => '^', 'web' => '^'}, # circumflex.
1053: '(tilde|#732)' => {'tex' => '~', 'web' => '~'}, # tilde.
1054:
1055: # General punctuation. We're not able to make a distinction between
1056: # the various length spacings in the print version. (e.g. en/em/thin).
1057: # the various joiners will be empty strings in the print version too.
1058:
1059:
1060: '(ensp|#8194)' => {'tex' => ' ', 'web' => "\x{2002}"}, # en space.
1061: '(emsp|#8195)' => {'tex' => ' ', 'web' => "\x{2003}"}, # em space.
1062: '(thinsp|#8201)' => {'tex' => ' ', 'web' => "\x{2009}"}, # thin space.
1063: '(zwnj|#8204)' => {'tex' => ' ', 'web' => "\x{200c}"}, # Zero width non joiner.
1064: '(zwj|#8205)' => {'tex' => ' ', 'web' => "\x{200d}"}, # Zero width joiner.
1065: '(lrm|#8206)' => {'tex' => ' ', 'web' => "\x{200e}"}, # Left to right mark
1066: '(rlm|#8207)' => {'tex' => ' ', 'web' => "\x{200f}"}, # right to left mark.
1067: '(ndash|#8211)' => {'tex' => '{/Text \55}', 'web' => "\x{2013}"}, # en dash.
1068: '(mdash|#8212)' => {'tex' => '{/Symbol \55}', 'web' => "\x{2014}"}, # em dash.
1069: '(lsquo|#8216)' => {'tex' => '{/Text \140}', 'web' => "\x{2018}"}, # Left single quote.
1070: '(rsquo|#8217)' => {'tex' => '\47', 'web' => "\x{2019}"}, # Right single quote.
1071: '(sbquo|#8218)' => {'tex' => '\54', 'web' => "\x{201a}"}, # Single low-9 quote.
1072: '(ldquo|#8220)' => {'tex' => '\42', 'web' => "\x{201c}"}, # Left double quote.
1073: '(rdquo|#8221)' => {'tex' => '\42', 'web' => "\x{201d}"}, # Right double quote.
1074: '(bdquo|#8222)' => {'tex' => ',', 'web' => "\x{201e}"}, # Double low-9 quote.
1075: '(dagger|#8224)' => {'tex' => '+', 'web' => "\x{2020}"}, # Is this a dagger I see before me now?
1076: '(Dagger|#8225)' => {'tex' => '\261', 'web' => "\x{2021}"}, # it's handle pointing towards my heart?
1077: '(bull|#8226)' => {'tex' => '\267', 'web' => "\x{2022}"}, # Bullet.
1078: '(hellep|#8230)' => {'tex' => '{/Symbol \274}', 'web' => "\x{2026}"}, # Ellipses.
1079: '(permil|#8240)' => {'tex' => '%_o', 'web' => "\x{2031}"}, # Per mille.
1080: '(prime|#8242)' => {'tex' => '\264', 'web' => "\x{2032}"}, # Prime.
1081: '(Prime|#8243)' => {'tex' => '{/Symbol \262}', 'web' => "\x{2033}"}, # double prime.
1082: '(lsaquo|#8249)' => {'tex' => '<', 'web' => "\x{2039}"}, # < quote.
1083: '(rsaquo|#8250)' => {'tex' => '\74', 'web' => "\x{203a}"}, # > quote.
1084: '(oline|#8254)' => {'tex' => '{/Symbol \140}', 'web' => "\x{203e}"}, # Overline.
1085: '(frasl|#8260)' => {'tex' => '/', 'web' => "\x{2044}"}, # Fraction slash.
1086: '(euro|#8364)' => {'tex' => '{/Symbol \240}', 'web' => "\x{20ac}"}, # Euro currency.
1087:
1088: # Letter like symbols.
1089:
1090: '(weierp|#8472)' => {'tex' => '{/Symbol \303}', 'web' => "\x{2118}"}, # Power set symbol
1091: '(image|#8465)' => {'tex' => '{/Symbol \301}', 'web' => "\x{2111}"}, # Imaginary part
1092: '(real|#8476)' => {'tex' => '{/Symbol \302}', 'web' => "\x{211c}"}, # Real part.
1093: '(trade|#8482)' => {'tex' => '{/Symbol \344}', 'web' => "\x{2122}"}, # trademark symbol.
1094: '(alefsym|#8501)' => {'tex' => '{/Symbol \300}', 'web' => "\x{2135}"}, # Hebrew alef.
1095:
1096: # Arrows of various types and directions.
1097: '(larr|#8592)' => {'tex' => '{/Symbol \254}', 'web' => "\x{2190}"}, # <--
1098: '(uarr|#8593)' => {'tex' => '{/Symbol \255}', 'web' => "\x{2191}"}, # up arrow.
1099: '(rarr|#8594)' => {'tex' => '{/Symbol \256}', 'web' => "\x{2192}"}, # -->
1100: '(darr|#8595)' => {'tex' => '{/Symbol \257}', 'web' => "\x{2193}"}, # down arrow.
1101: '(harr|#8596)' => {'tex' => '{/Symbol \253}', 'web' => "\x{2194}"}, # <-->
1102: '(crarr|#8629)' => {'tex' => '{/Symbol \277}', 'web' => "\x{21b5}"}, # corner arrow down and right.
1103: '(lArr|#8656)' => {'tex' => '{/Symbol \334}', 'web' => "\x{21d0}"}, # <==
1104: '(uArr|#8657)' => {'tex' => '{/Symbol \335}', 'web' => "\x{21d1}"}, # Up double arrow.
1105: '(rArr|#8658)' => {'tex' => '{/Symbol \336}', 'web' => "\x{21d2}"}, # ==>
1106: '(dArr|#8659)' => {'tex' => '{/Symbol \337}', 'web' => "\x{21d3}"}, # Down double arrow.
1107: '(hArr|#8660)' => {'tex' => '{/Symbol \333}', 'web' => "\x{21d4}"}, # <==>
1108:
1109: # Mathematical operators. For some of these we do the best we can in printing.
1110:
1111: '(forall|#8704)' => {'tex' => '{/Symbol \42}', 'web' => "\x{2200}"}, # For all.
1112: '(part|#8706)' => {'tex' => '{/Symbol d}', 'web' => "\x{2202}"}, # partial derivative
1113: '(exist|#8707)' => {'tex' => '{/Symbol \44}', 'web' => "\x{2203}"}, # There exists.
1114: '(empty|#8709)' => {'tex' => '{/Symbol \306}', 'web' => "\x{2205}"}, # Null set.
1115: '(nabla|#8711)' => {'tex' => '{/Symbol \321}', 'web' => "\x{2207}"}, # Gradient e.g.
1116: '(isin|#8712)' => {'tex' => '{/Symbol \316}', 'web' => "\x{2208}"}, # Element of the set.
1117: '(notin|#8713)' => {'tex' => '{/Symbol \317}', 'web' => "\x{2209}"}, # Not an element of
1118: '(ni|#8715)' => {'tex' => '{/Symbol \47}', 'web' => "\x{220b}"}, # Contains as a member
1119: '(prod|#8719)' => {'tex' => '{/Symbol \325}', 'web' => "\x{220f}"}, # Product
1120: '(sum|#8721)' => {'tex' => '{/Symbol \345}', 'web' => "\x{2211}"}, # Sum of.
1121: '(minus|#8722)' => {'tex' => '{/Symbol \55}', 'web' => "\x{2212}"}, # - sign.
1122: '(lowast|#8727)' => {'tex' => '*', 'web' => "\x{2217}"}, # *
1123: '(radic|#8730)' => {'tex' => '{/Symbol \326}', 'web' => "\x{221a}"}, # Square root.
1124: '(prop|#8733)' => {'tex' => '{/Symbol \265}', 'web' => "\x{221d}"}, # Proportional to.
1125: '(infin|#8734)' => {'tex' => '{/Symbol \245}', 'web' => "\x{221e}"}, # Infinity.
1126: '(ang|#8736)' => {'tex' => '{/Symbol \320}', 'web' => "\x{2220}"}, # Angle .
1127: '(and|#8743)' => {'tex' => '{/Symbol \331}', 'web' => "\x{2227}"}, # Logical and.
1128: '(or|#8744)' => {'tex' => '{/Symbol \332}', 'web' => "\x{2228}"}, # Logical or.
1129: '(cap|#8745)' => {'tex' => '{/Symbol \307}', 'web' => "\x{2229}"}, # Set intersection.
1130: '(cup|#8746)' => {'tex' => '{/Symbol \310}', 'web' => "\x{222a}"}, # Set union.
1131: '(int|8747)' => {'tex' => '{/Symbol \362}', 'web' => "\x{222b}"}, # Integral.
1132:
1133: # Some gnuplot guru will have to explain to me why the next three
1134: # require the extra slashes... else they print very funkily.
1135:
1136: '(there4|#8756)' => {'tex' => '{/Symbol \\\134}', 'web' => "\x{2234}"}, # Therefore triple dots.
1137: '(sim|#8764)' => {'tex' => '\\\176', 'web' => "\x{223c}"}, # Simlar to.
1138: '(cong|#8773)' => {'tex' => '{/Symbol \\\100}','web' => "\x{2245}"}, # Congruent to/with.
1139:
1140: '(asymp|#8776)' => {'tex' => '{/Symbol \273}', 'web' => "\x{2248}"}, # Asymptotic to.
1141: '(ne|#8800)' => {'tex' => '{/Symbol \271}', 'web' => "\x{2260}"}, # not equal to.
1142: '(equiv|#8801)' => {'tex' => '{/Symbol \272}', 'web' => "\x{2261}"}, # Equivalent to.
1143: '(le|8804)' => {'tex' => '{/Symbol \243}', 'web' => "\x{2264}"}, # Less than or equal to.
1144: '(ge|8805)' => {'tex' => '{/Symbol \263}', 'web' => "\x{2265}"}, # Greater than or equal to
1145: '(sub|8834)' => {'tex' => '{/Symbol \314}', 'web' => "\x{2282}"}, # Subset of.
1146: '(sup|8835)' => {'tex' => '{/Symbol \311}', 'web' => "\x{2283}"}, # Super set of.
1147: '(nsub|8836)' => {'tex' => '{/Symbol \313}', 'web' => "\x{2284}"}, # not subset of.
1148: '(sube|8838)' => {'tex' => '{/Symbol \315}', 'web' => "\x{2286}"}, # Subset or equal.
1149: '(supe|8839)' => {'tex' => '{/Symbol \312}', 'web' => "\x{2287}"}, # Superset or equal
1150: '(oplus|8853)' => {'tex' => '{/Symbol \305}', 'web' => "\x{2295}"}, # O with plus inside
1151: '(otimes|8855)' => {'tex' => '{/Symbol \304}', 'web' => "\x{2297}"}, # O with times.
1152: '(perp|8869)' => {'tex' => '{/Symbol \136}', 'web' => "\x{22a5}"}, # Perpendicular.
1153: '(sdot|8901)' => {'tex' => '{/Symbol \227}', 'web' => "\x{22c5}"}, # Dot operator.
1154:
1155: # Misc. technical symbols:
1156:
1157: '(lceil|8698)' => {'tex' => '{/Symbol \351}', 'web' => "\x{2308}"}, # Left ceiling.
1158: '(rceil|8969)' => {'tex' => '{/Symbol \371}', 'web' => "\x{2309}"}, # Right ceiling.
1159: '(lfloor|8970)' => {'tex' => '{/Symbol \353}', 'web' => "\x{230a}"}, # Left floor.
1160: '(rfloor|8971)' => {'tex' => '{/Symbol \373}', 'web' => "\x{230b}"}, # Right floor.
1161:
1162: # The gnuplot png font evidently does not have the big angle brackets at
1163: # positions 0x2329, 0x232a so use ordinary brackets.
1164:
1165: '(lang|9001)' => {'tex' => '{/Symbol \341}', 'web' => '<'}, # Left angle bracket.
1166: '(rang|9002)' => {'tex' => '{/Symbol \361}', 'web' => '>'}, # Right angle bracket.
1167:
1168: # Gemoetric shapes.
1169:
1170: '(loz|9674)' => {'tex' => '{/Symbol \340}', 'web' => "\x{25ca}"}, # Lozenge.
1171:
1172: # Misc. symbols
1173:
1174: '(spades|9824)' => {'tex' => '{/Symbol \252}', 'web' => "\x{2660}"},
1175: '(clubs|9827)' => {'tex' => '{/Symbol \247}', 'web' => "\x{2663}"},
1176: '(hearts|9829)' => {'tex' => '{/Symbol \251}', 'web' => "\x{2665}"},
1177: '(diams|9830)' => {'tex' => '{/Symbol \250}', 'web' => "\x{2666}"}
1178:
1179: );
1180:
1181:
1182: sub replace_entities {
1183: my ($target,$text) = @_;
1184: $text =~ s{([_^~\{\}]|\\\\)}{\\\\$1}g;
1185: while (my ($re, $replace) = each(%lookup)) {
1186: my $repl = $replace->{$target};
1187: $text =~ s/&$re;/$replace->{$target}/g;
1188: }
1189: $text =~ s{(&)}{\\\\$1}g;
1190: return $text;
1191: }
1192:
1193: ##------------------------------------------------------------------- title
1194: sub start_title {
1195: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1196: my $result='';
1197: if ($target eq 'web' || $target eq 'tex') {
1198: $title = &Apache::lonxml::get_all_text("/title",$parser,$style);
1199: $title=&Apache::run::evaluate($title,$safeeval,$$parstack[-1]);
1200: $title =~ s/\n/ /g;
1201: if (length($title) > $max_str_len) {
1202: $title = substr($title,0,$max_str_len);
1203: }
1204: $title = &parse_label($target,$title);
1205: } elsif ($target eq 'edit') {
1206: $result.=&Apache::edit::tag_start($target,$token,'Plot Title');
1207: my $text=&Apache::lonxml::get_all_text("/title",$parser,$style);
1208: $result.=&Apache::edit::editline('',$text,'',60);
1209: } elsif ($target eq 'modified') {
1210: $result.=&Apache::edit::rebuild_tag($token);
1211: $result.=&Apache::edit::modifiedfield("/title",$parser);
1212: }
1213: return $result;
1214: }
1215:
1216: sub end_title {
1217: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1218: my $result = '';
1219: if ($target eq 'web' || $target eq 'tex') {
1220: } elsif ($target eq 'edit') {
1221: $result.=&Apache::edit::tag_end($target,$token);
1222: }
1223: return $result;
1224: }
1225: ##------------------------------------------------------------------- xlabel
1226: sub start_xlabel {
1227: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1228: my $result='';
1229: if ($target eq 'web' || $target eq 'tex') {
1230: $xlabel = &Apache::lonxml::get_all_text("/xlabel",$parser,$style);
1231: $xlabel=&Apache::run::evaluate($xlabel,$safeeval,$$parstack[-1]);
1232: $xlabel =~ s/\n/ /g;
1233: if (length($xlabel) > $max_str_len) {
1234: $xlabel = substr($xlabel,0,$max_str_len);
1235: }
1236: $xlabel = &parse_label($target,$xlabel);
1237: } elsif ($target eq 'edit') {
1238: $result.=&Apache::edit::tag_start($target,$token,'Plot Xlabel');
1239: my $text=&Apache::lonxml::get_all_text("/xlabel",$parser,$style);
1240: $result.=&Apache::edit::editline('',$text,'',60);
1241: } elsif ($target eq 'modified') {
1242: $result.=&Apache::edit::rebuild_tag($token);
1243: $result.=&Apache::edit::modifiedfield("/xlabel",$parser);
1244: }
1245: return $result;
1246: }
1247:
1248: sub end_xlabel {
1249: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1250: my $result = '';
1251: if ($target eq 'web' || $target eq 'tex') {
1252: } elsif ($target eq 'edit') {
1253: $result.=&Apache::edit::tag_end($target,$token);
1254: }
1255: return $result;
1256: }
1257:
1258: ##------------------------------------------------------------------- ylabel
1259: sub start_ylabel {
1260: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1261: my $result='';
1262: if ($target eq 'web' || $target eq 'tex') {
1263: $ylabel = &Apache::lonxml::get_all_text("/ylabel",$parser,$style);
1264: $ylabel = &Apache::run::evaluate($ylabel,$safeeval,$$parstack[-1]);
1265: $ylabel =~ s/\n/ /g;
1266: if (length($ylabel) > $max_str_len) {
1267: $ylabel = substr($ylabel,0,$max_str_len);
1268: }
1269: $ylabel = &parse_label($target,$ylabel);
1270: } elsif ($target eq 'edit') {
1271: $result .= &Apache::edit::tag_start($target,$token,'Plot Ylabel');
1272: my $text = &Apache::lonxml::get_all_text("/ylabel",$parser,$style);
1273: $result .= &Apache::edit::editline('',$text,'',60);
1274: } elsif ($target eq 'modified') {
1275: $result.=&Apache::edit::rebuild_tag($token);
1276: $result.=&Apache::edit::modifiedfield("/ylabel",$parser);
1277: }
1278: return $result;
1279: }
1280:
1281: sub end_ylabel {
1282: my ($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 $result;
1289: }
1290:
1291: ##------------------------------------------------------------------- label
1292: sub start_label {
1293: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1294: my $result='';
1295: if ($target eq 'web' || $target eq 'tex') {
1296: my %label;
1297: &get_attributes(\%label,\%label_defaults,$parstack,$safeeval,
1298: $tagstack->[-1]);
1299: my $text = &Apache::lonxml::get_all_text("/label",$parser,$style);
1300: $text = &Apache::run::evaluate($text,$safeeval,$$parstack[-1]);
1301: $text =~ s/\n/ /g;
1302: $text = substr($text,0,$max_str_len) if (length($text) > $max_str_len);
1303: $label{'text'} = &parse_label($target,$text);
1304: push(@labels,\%label);
1305: } elsif ($target eq 'edit') {
1306: $result .= &Apache::edit::tag_start($target,$token,'Plot Label');
1307: $result .= &edit_attributes($target,$token,\%label_defaults);
1308: my $text = &Apache::lonxml::get_all_text("/label",$parser,$style);
1309: $result .= &Apache::edit::end_row().
1310: &Apache::edit::start_spanning_row().
1311: &Apache::edit::editline('',$text,'',60);
1312: } elsif ($target eq 'modified') {
1313: &Apache::edit::get_new_args
1314: ($token,$parstack,$safeeval,keys(%label_defaults));
1315: $result.=&Apache::edit::rebuild_tag($token);
1316: $result.=&Apache::edit::modifiedfield("/label",$parser);
1317: }
1318: return $result;
1319: }
1320:
1321: sub end_label {
1322: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1323: my $result = '';
1324: if ($target eq 'web' || $target eq 'tex') {
1325: } elsif ($target eq 'edit') {
1326: $result.=&Apache::edit::tag_end($target,$token);
1327: }
1328: return $result;
1329: }
1330:
1331: ##------------------------------------------------------------------- curve
1332: sub start_curve {
1333: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1334: my $result='';
1335: &Apache::lonxml::register('Apache::lonplot',('function','data'));
1336: push (@Apache::lonxml::namespace,'curve');
1337: if ($target eq 'web' || $target eq 'tex') {
1338: my %curve;
1339: &get_attributes(\%curve,\%curve_defaults,$parstack,$safeeval,
1340: $tagstack->[-1]);
1341: push (@curves,\%curve);
1342: } elsif ($target eq 'edit') {
1343: $result .= &Apache::edit::tag_start($target,$token,'Curve');
1344: $result .= &edit_attributes($target,$token,\%curve_defaults,
1345: \@curve_edit_order)
1346: .&Apache::edit::end_row()
1347: .&Apache::edit::start_spanning_row();
1348:
1349: } elsif ($target eq 'modified') {
1350: my $constructtag=&Apache::edit::get_new_args
1351: ($token,$parstack,$safeeval,keys(%curve_defaults));
1352: if ($constructtag) {
1353: $result = &Apache::edit::rebuild_tag($token);
1354: }
1355: }
1356: return $result;
1357: }
1358:
1359: sub end_curve {
1360: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1361: my $result = '';
1362: pop @Apache::lonxml::namespace;
1363: &Apache::lonxml::deregister('Apache::lonplot',('function','data'));
1364: if ($target eq 'web' || $target eq 'tex') {
1365: } elsif ($target eq 'edit') {
1366: $result.=&Apache::edit::tag_end($target,$token);
1367: }
1368: return $result;
1369: }
1370:
1371: ##------------------------------------------------------------ curve function
1372: sub start_function {
1373: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1374: my $result='';
1375: if ($target eq 'web' || $target eq 'tex') {
1376: if (exists($curves[-1]->{'data'})) {
1377: &Apache::lonxml::warning
1378: ('Use of the <b>curve function</b> tag precludes use of '.
1379: ' the <b>curve data</b> tag. '.
1380: 'The curve data tag will be omitted in favor of the '.
1381: 'curve function declaration.');
1382: delete $curves[-1]->{'data'} ;
1383: }
1384: my $function = &Apache::lonxml::get_all_text("/function",$parser,
1385: $style);
1386: $function = &Apache::run::evaluate($function,$safeeval,$$parstack[-1]);
1387: $function=~s/\^/\*\*/gs;
1388: $curves[-1]->{'function'} = $function;
1389: } elsif ($target eq 'edit') {
1390: $result .= &Apache::edit::tag_start($target,$token,'Gnuplot compatible curve function');
1391: my $text = &Apache::lonxml::get_all_text("/function",$parser,$style);
1392: $result .= &Apache::edit::editline('',$text,'',60);
1393: } elsif ($target eq 'modified') {
1394: $result.=&Apache::edit::rebuild_tag($token);
1395: $result.=&Apache::edit::modifiedfield("/function",$parser);
1396: }
1397: return $result;
1398: }
1399:
1400: sub end_function {
1401: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1402: my $result = '';
1403: if ($target eq 'web' || $target eq 'tex') {
1404: } elsif ($target eq 'edit') {
1405: $result .= &Apache::edit::end_table();
1406: }
1407: return $result;
1408: }
1409:
1410: ##------------------------------------------------------------ curve data
1411: sub start_data {
1412: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1413: my $result='';
1414: if ($target eq 'web' || $target eq 'tex') {
1415: if (exists($curves[-1]->{'function'})) {
1416: &Apache::lonxml::warning
1417: ('Use of the <b>curve function</b> tag precludes use of '.
1418: ' the <b>curve data</b> tag. '.
1419: 'The curve function tag will be omitted in favor of the '.
1420: 'curve data declaration.');
1421: delete($curves[-1]->{'function'});
1422: }
1423: my $datatext = &Apache::lonxml::get_all_text("/data",$parser,$style);
1424: $datatext=&Apache::run::evaluate($datatext,$safeeval,$$parstack[-1]);
1425: # Deal with cases where we're given an array...
1426: if ($datatext =~ /^\@/) {
1427: $datatext = &Apache::run::run('return "'.$datatext.'"',
1428: $safeeval,1);
1429: }
1430: $datatext =~ s/\s+/ /g;
1431: # Need to do some error checking on the @data array -
1432: # make sure it's all numbers and make sure each array
1433: # is of the same length.
1434: my @data;
1435: if ($datatext =~ /,/) { # comma deliminated
1436: @data = split /,/,$datatext;
1437: } else { # Assume it's space separated.
1438: @data = split / /,$datatext;
1439: }
1440: for (my $i=0;$i<=$#data;$i++) {
1441: # Check that it's non-empty
1442: if (! defined($data[$i])) {
1443: &Apache::lonxml::warning(
1444: 'undefined curve data value. Replacing with '.
1445: ' pi/e = 1.15572734979092');
1446: $data[$i] = 1.15572734979092;
1447: }
1448: # Check that it's a number
1449: if (! &$real_test($data[$i]) & ! &$int_test($data[$i])) {
1450: &Apache::lonxml::warning(
1451: 'Bad curve data value of '.$data[$i].' Replacing with '.
1452: ' pi/e = 1.15572734979092');
1453: $data[$i] = 1.15572734979092;
1454: }
1455: }
1456: # complain if the number of data points is not the same as
1457: # in previous sets of data.
1458: if (($curves[-1]->{'data'}) && ($#data != $#{$curves[-1]->{'data'}->[0]})){
1459: &Apache::lonxml::warning
1460: ('Number of data points is not consistent with previous '.
1461: 'number of data points');
1462: }
1463: push @{$curves[-1]->{'data'}},\@data;
1464: } elsif ($target eq 'edit') {
1465: $result .= &Apache::edit::tag_start($target,$token,'Comma or space deliminated curve data');
1466: my $text = &Apache::lonxml::get_all_text("/data",$parser,$style);
1467: $result .= &Apache::edit::editline('',$text,'',60);
1468: } elsif ($target eq 'modified') {
1469: $result.=&Apache::edit::rebuild_tag($token);
1470: $result.=&Apache::edit::modifiedfield("/data",$parser);
1471: }
1472: return $result;
1473: }
1474:
1475: sub end_data {
1476: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1477: my $result = '';
1478: if ($target eq 'web' || $target eq 'tex') {
1479: } elsif ($target eq 'edit') {
1480: $result .= &Apache::edit::end_table();
1481: }
1482: return $result;
1483: }
1484:
1485: ##------------------------------------------------------------------- axis
1486: sub start_axis {
1487: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1488: my $result='';
1489: if ($target eq 'web' || $target eq 'tex') {
1490: &get_attributes(\%axis,\%axis_defaults,$parstack,$safeeval,
1491: $tagstack->[-1]);
1492: } elsif ($target eq 'edit') {
1493: $result .= &Apache::edit::tag_start($target,$token,'Plot Axes');
1494: $result .= &edit_attributes($target,$token,\%axis_defaults,
1495: \@axis_edit_order);
1496: } elsif ($target eq 'modified') {
1497: my $constructtag=&Apache::edit::get_new_args
1498: ($token,$parstack,$safeeval,keys(%axis_defaults));
1499: if ($constructtag) {
1500: $result = &Apache::edit::rebuild_tag($token);
1501: }
1502: }
1503: return $result;
1504: }
1505:
1506: sub end_axis {
1507: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1508: my $result = '';
1509: if ($target eq 'web' || $target eq 'tex') {
1510: } elsif ($target eq 'edit') {
1511: $result.=&Apache::edit::tag_end($target,$token);
1512: } elsif ($target eq 'modified') {
1513: }
1514: return $result;
1515: }
1516:
1517: ###################################################################
1518: ## ##
1519: ## Utility Functions ##
1520: ## ##
1521: ###################################################################
1522:
1523: ##----------------------------------------------------------- set_defaults
1524: sub set_defaults {
1525: my ($var,$defaults) = @_;
1526: my $key;
1527: foreach $key (keys(%$defaults)) {
1528: $var->{$key} = $defaults->{$key}->{'default'};
1529: }
1530: }
1531:
1532: ##------------------------------------------------------------------- misc
1533: sub get_attributes{
1534: my ($values,$defaults,$parstack,$safeeval,$tag) = @_;
1535: foreach my $attr (keys(%{$defaults})) {
1536: if ($attr eq 'texwidth' || $attr eq 'texfont') {
1537: $values->{$attr} =
1538: &Apache::lonxml::get_param($attr,$parstack,$safeeval,undef,1);
1539: } else {
1540: $values->{$attr} =
1541: &Apache::lonxml::get_param($attr,$parstack,$safeeval);
1542: }
1543: if ($values->{$attr} eq '' | !defined($values->{$attr})) {
1544: $values->{$attr} = $defaults->{$attr}->{'default'};
1545: next;
1546: }
1547: my $test = $defaults->{$attr}->{'test'};
1548: if (! &$test($values->{$attr})) {
1549: &Apache::lonxml::warning
1550: ($tag.':'.$attr.': Bad value.'.'Replacing your value with : '
1551: .$defaults->{$attr}->{'default'} );
1552: $values->{$attr} = $defaults->{$attr}->{'default'};
1553: }
1554: }
1555: return ;
1556: }
1557:
1558: ##------------------------------------------------------- write_gnuplot_file
1559: sub write_gnuplot_file {
1560: my ($tmpdir,$filename,$target)= @_;
1561: my ($fontsize, $font_properties) = &get_font($target);
1562: my $gnuplot_input = '';
1563: my $curve;
1564: #
1565: # Check to be sure we do not have any empty curves
1566: my @curvescopy;
1567: foreach my $curve (@curves) {
1568: if (exists($curve->{'function'})) {
1569: if ($curve->{'function'} !~ /^\s*$/) {
1570: push(@curvescopy,$curve);
1571: }
1572: } elsif (exists($curve->{'data'})) {
1573: foreach my $data (@{$curve->{'data'}}) {
1574: if (scalar(@$data) > 0) {
1575: push(@curvescopy,$curve);
1576: last;
1577: }
1578: }
1579: }
1580: }
1581: @curves = @curvescopy;
1582: # Collect all the colors
1583: my @Colors;
1584: push @Colors, $Apache::lonplot::plot{'bgcolor'};
1585: push @Colors, $Apache::lonplot::plot{'fgcolor'};
1586: push @Colors, (defined($axis{'color'})?$axis{'color'}:$Apache::lonplot::plot{'fgcolor'});
1587: foreach $curve (@curves) {
1588: push @Colors, ($curve->{'color'} ne '' ?
1589: $curve->{'color'} :
1590: $Apache::lonplot::plot{'fgcolor'} );
1591: }
1592: # set term
1593: if ($target eq 'web') {
1594: $gnuplot_input .= 'set terminal png enhanced nocrop ';
1595: $gnuplot_input .= 'transparent ' if ($Apache::lonplot::plot{'transparent'} eq 'on');
1596: $gnuplot_input .= 'font "'.$Apache::lonnet::perlvar{'lonFontsDir'}.
1597: '/'.$font_properties->{'file'}.'.ttf" ';
1598: $gnuplot_input .= $fontsize;
1599: $gnuplot_input .= ' size '.$Apache::lonplot::plot{'width'}.','.$Apache::lonplot::plot{'height'}.' ';
1600: $gnuplot_input .= "@Colors\n";
1601: # set output
1602: $gnuplot_input .= "set output\n";
1603: } elsif ($target eq 'tex') {
1604: $gnuplot_input .= "set term postscript eps enhanced $Apache::lonplot::plot{'plotcolor'} solid ";
1605: if (!$font_properties->{'tex_no_file'}) {
1606: $gnuplot_input .=
1607: 'fontfile "'.$Apache::lonnet::perlvar{'lonFontsDir'}.
1608: '/'.$font_properties->{'file'}.'.pfb" ';
1609: }
1610: $gnuplot_input .= ' "'.$font_properties->{'printname'}.'" ';
1611: $gnuplot_input .= $fontsize;
1612: $gnuplot_input .= "\nset output \"/home/httpd/perl/tmp/".
1613: &unescape($filename).".eps\"\n";
1614: $gnuplot_input .= "set encoding iso_8859_1\n"; # Get access to extended font.
1615:
1616: }
1617: # cartesian or polar plot?
1618: if (lc($Apache::lonplot::plot{'plottype'}) eq 'polar') {
1619: $gnuplot_input .= 'set polar'.$/;
1620: } else {
1621: # Assume Cartesian
1622: }
1623: # cartesian or polar grid?
1624: if (lc($Apache::lonplot::plot{'gridtype'}) eq 'polar') {
1625: $gnuplot_input .= 'set grid polar'.$/;
1626: } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'linear-log') {
1627: $gnuplot_input .= 'set logscale x'.$/;
1628: } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'log-linear') {
1629: $gnuplot_input .= 'set logscale y'.$/;
1630: } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'log-log') {
1631: $gnuplot_input .= 'set logscale x'.$/;
1632: $gnuplot_input .= 'set logscale y'.$/;
1633: } else {
1634: # Assume Cartesian
1635: }
1636: # solid or pattern for boxes?
1637: if (lc($Apache::lonplot::plot{'fillstyle'}) eq 'solid') {
1638: $gnuplot_input .= 'set style fill solid '.
1639: $Apache::lonplot::plot{'solid'}.$Apache::lonplot::plot{'box_border'}.$/;
1640: } elsif (lc($Apache::lonplot::plot{'fillstyle'}) eq 'pattern') {
1641: $gnuplot_input .= 'set style fill pattern '.$Apache::lonplot::plot{'pattern'}.$Apache::lonplot::plot{'box_border'}.$/;
1642: } elsif (lc($Apache::lonplot::plot{'fillstyle'}) eq 'empty') {
1643: }
1644: # margin
1645: if (lc($Apache::lonplot::plot{'lmargin'}) ne 'default') {
1646: $gnuplot_input .= 'set lmargin '.$Apache::lonplot::plot{'lmargin'}.$/;
1647: }
1648: if (lc($Apache::lonplot::plot{'rmargin'}) ne 'default') {
1649: $gnuplot_input .= 'set rmargin '.$Apache::lonplot::plot{'rmargin'}.$/;
1650: }
1651: if (lc($Apache::lonplot::plot{'tmargin'}) ne 'default') {
1652: $gnuplot_input .= 'set tmargin '.$Apache::lonplot::plot{'tmargin'}.$/;
1653: }
1654: if (lc($Apache::lonplot::plot{'bmargin'}) ne 'default') {
1655: $gnuplot_input .= 'set bmargin '.$Apache::lonplot::plot{'bmargin'}.$/;
1656: }
1657:
1658: # tic scales
1659: if ($version > 4) {
1660: $gnuplot_input .= 'set tics scale '.
1661: $Apache::lonplot::plot{'major_ticscale'}.', '.$Apache::lonplot::plot{'minor_ticscale'}.$/;
1662: } else {
1663: $gnuplot_input .= 'set ticscale '.
1664: $Apache::lonplot::plot{'major_ticscale'}.' '.$Apache::lonplot::plot{'minor_ticscale'}.$/;
1665: }
1666: #boxwidth
1667: if (lc($Apache::lonplot::plot{'boxwidth'}) ne '') {
1668: $gnuplot_input .= 'set boxwidth '.$Apache::lonplot::plot{'boxwidth'}.$/;
1669: }
1670: # gridlayer
1671: $gnuplot_input .= 'set grid noxtics noytics front '.$/
1672: if ($Apache::lonplot::plot{'gridlayer'} eq 'on');
1673:
1674: # grid
1675: $gnuplot_input .= 'set grid'.$/ if ($Apache::lonplot::plot{'grid'} eq 'on');
1676: # border
1677: $gnuplot_input .= ($Apache::lonplot::plot{'border'} eq 'on'?
1678: 'set border'.$/ :
1679: 'set noborder'.$/ );
1680: # sampling rate for non-data curves
1681: $gnuplot_input .= "set samples $Apache::lonplot::plot{'samples'}\n";
1682: # title, xlabel, ylabel
1683: # titles
1684: my $offset;
1685: if ($version >= 4.4) {
1686: $offset = 'offset ';
1687: }
1688: my $extra_space_x = ($xtics{'location'} eq 'axis') ? ' '.$offset.'0, -0.5 ' : '';
1689: my $extra_space_y = ($ytics{'location'} eq 'axis') ? ' '.$offset.'-0.5, 0 ' : '';
1690:
1691: if ($target eq 'tex') {
1692: $gnuplot_input .= "set title \"$title\" font \"".$font_properties->{'printname'}.",".$fontsize."pt\"\n" if (defined($title)) ;
1693: $gnuplot_input .= "set xlabel \"$xlabel\" $extra_space_x font \"".$font_properties->{'printname'}.",".$fontsize."pt\"\n" if (defined($xlabel));
1694: $gnuplot_input .= "set ylabel \"$ylabel\" $extra_space_y font \"".$font_properties->{'printname'}.",".$fontsize."pt\"\n" if (defined($ylabel));
1695: } else {
1696: $gnuplot_input .= "set title \"$title\" \n" if (defined($title)) ;
1697: $gnuplot_input .= "set xlabel \"$xlabel\" $extra_space_x \n" if (defined($xlabel));
1698: $gnuplot_input .= "set ylabel \"$ylabel\" $extra_space_y \n" if (defined($ylabel));
1699: }
1700: # tics
1701: if (%xtics) {
1702: $gnuplot_input .= "set xtics $xtics{'location'} ";
1703: $gnuplot_input .= ( $xtics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1704: $gnuplot_input .= "$xtics{'start'}, ";
1705: $gnuplot_input .= "$xtics{'increment'}, ";
1706: $gnuplot_input .= "$xtics{'end'} ";
1707: if ($target eq 'tex') {
1708: $gnuplot_input .= 'font "Helvetica,22"'; # Needed in iso 8859-1 enc.
1709: }
1710: $gnuplot_input .= "\n";
1711: if ($xtics{'minorfreq'} != 0) {
1712: $gnuplot_input .= "set mxtics ".$xtics{'minorfreq'}."\n";
1713: }
1714: } else {
1715: if ($target eq 'tex') {
1716: $gnuplot_input .= 'set xtics font "Helvetica,22"'."\n"; # needed in iso 8859-1 enc
1717: }
1718: }
1719: if (%ytics) {
1720: $gnuplot_input .= "set ytics $ytics{'location'} ";
1721: $gnuplot_input .= ( $ytics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1722: $gnuplot_input .= "$ytics{'start'}, ";
1723: $gnuplot_input .= "$ytics{'increment'}, ";
1724: $gnuplot_input .= "$ytics{'end'} ";
1725: if ($target eq 'tex') {
1726: $gnuplot_input .= 'font "Helvetica,22"'; # Needed in iso-8859-1 encoding.
1727: }
1728: $gnuplot_input .= "\n";
1729: if ($ytics{'minorfreq'} != 0) {
1730: $gnuplot_input .= "set mytics ".$ytics{'minorfreq'}."\n";
1731: }
1732: } else {
1733: if ($target eq 'tex') {
1734: $gnuplot_input .= 'set ytics font "Helvetica,22"'."\n"; # Needed for iso 8859-1 enc.
1735: }
1736: }
1737: # axis
1738: if (%axis) {
1739: if ($axis{'xformat'} ne 'on') {
1740: $gnuplot_input .= "set format x ";
1741: if ($axis{'xformat'} eq 'off') {
1742: $gnuplot_input .= "\"\"\n";
1743: } else {
1744: $gnuplot_input .= "\"\%.".$axis{'xformat'}."\"\n";
1745: }
1746: }
1747: if ($axis{'yformat'} ne 'on') {
1748: $gnuplot_input .= "set format y ";
1749: if ($axis{'yformat'} eq 'off') {
1750: $gnuplot_input .= "\"\"\n";
1751: } else {
1752: $gnuplot_input .= "\"\%.".$axis{'yformat'}."\"\n";
1753: }
1754: }
1755: $gnuplot_input .= "set xrange \[$axis{'xmin'}:$axis{'xmax'}\]\n";
1756: $gnuplot_input .= "set yrange \[$axis{'ymin'}:$axis{'ymax'}\]\n";
1757: if ($axis{'xzero'} ne 'off') {
1758: $gnuplot_input .= "set xzeroaxis ";
1759: if ($axis{'xzero'} eq 'line' || $axis{'xzero'} eq 'thick-line') {
1760: $gnuplot_input .= "lt -1 ";
1761: if ($axis{'xzero'} eq 'thick-line') {
1762: $gnuplot_input .= "lw 3 ";
1763: }
1764: }
1765: $gnuplot_input .= "\n";
1766: }
1767: if ($axis{'yzero'} ne 'off') {
1768: $gnuplot_input .= "set yzeroaxis ";
1769: if ($axis{'yzero'} eq 'line' || $axis{'yzero'} eq 'thick-line') {
1770: $gnuplot_input .= "lt -1 ";
1771: if ($axis{'yzero'} eq 'thick-line') {
1772: $gnuplot_input .= "lw 3 ";
1773: }
1774: }
1775: $gnuplot_input .= "\n";
1776: }
1777: }
1778: # Key
1779: if (%key) {
1780: $gnuplot_input .= 'set key '.$key{'pos'}.' ';
1781: if ($key{'title'} ne '') {
1782: $gnuplot_input .= 'title "'.$key{'title'}.'" ';
1783: }
1784: $gnuplot_input .= ($key{'box'} eq 'on' ? 'box ' : 'nobox ').$/;
1785: } else {
1786: $gnuplot_input .= 'set nokey'.$/;
1787: }
1788: # labels
1789: my $label;
1790: foreach $label (@labels) {
1791: $gnuplot_input .= 'set label "'.$label->{'text'}.'" at '.
1792: $label->{'xpos'}.','.$label->{'ypos'};
1793: if ($label->{'rotate'} ne '') {
1794: $gnuplot_input .= ' rotate by '.$label->{'rotate'};
1795: }
1796: $gnuplot_input .= ' '.$label->{'justify'};
1797:
1798: if ($target eq 'tex') {
1799: $gnuplot_input .=' font "'.$font_properties->{'printname'}.','.$fontsize.'pt"' ;
1800: }
1801: $gnuplot_input .= $/;
1802: }
1803: if ($target eq 'tex') {
1804: $gnuplot_input .="set size 1,".$Apache::lonplot::plot{'height'}/$Apache::lonplot::plot{'width'}*1.38;
1805: $gnuplot_input .="\n";
1806: }
1807: # curves
1808: $gnuplot_input .= 'plot ';
1809: for (my $i = 0;$i<=$#curves;$i++) {
1810: $curve = $curves[$i];
1811: $gnuplot_input.= ', ' if ($i > 0);
1812: if ($target eq 'tex') {
1813: $curve->{'linewidth'} *= 2;
1814: }
1815: if (exists($curve->{'function'})) {
1816: $gnuplot_input.=
1817: $curve->{'function'}.' title "'.
1818: $curve->{'name'}.'" with '.
1819: $curve->{'linestyle'};
1820:
1821: if (($curve->{'linestyle'} eq 'points') ||
1822: ($curve->{'linestyle'} eq 'linespoints') ||
1823: ($curve->{'linestyle'} eq 'errorbars') ||
1824: ($curve->{'linestyle'} eq 'xerrorbars') ||
1825: ($curve->{'linestyle'} eq 'yerrorbars') ||
1826: ($curve->{'linestyle'} eq 'xyerrorbars')) {
1827: $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
1828: $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1829: } elsif ($curve->{'linestyle'} eq 'filledcurves') {
1830: $gnuplot_input.= ' '.$curve->{'limit'};
1831: } elsif ($curve->{'linetype'} ne '' &&
1832: $curve->{'linestyle'} eq 'lines') {
1833: $gnuplot_input.= ' linetype ';
1834: $gnuplot_input.= $linetypes{$curve->{'linetype'}};
1835: $gnuplot_input.= ' linecolor rgb "';
1836: # convert color from xaaaaaa to #aaaaaa
1837: $curve->{'color'} =~ s/^x/#/;
1838: $gnuplot_input.= $curve->{'color'}.'"';
1839: }
1840: $gnuplot_input.= ' linewidth '.$curve->{'linewidth'};
1841:
1842: } elsif (exists($curve->{'data'})) {
1843: # Store data values in $datatext
1844: my $datatext = '';
1845: # get new filename
1846: my $datafilename = "$tmpdir/$filename.data.$i";
1847: my $fh=Apache::File->new(">$datafilename");
1848: # Compile data
1849: my @Data = @{$curve->{'data'}};
1850: my @Data0 = @{$Data[0]};
1851: for (my $i =0; $i<=$#Data0; $i++) {
1852: my $dataset;
1853: foreach $dataset (@Data) {
1854: $datatext .= $dataset->[$i] . ' ';
1855: }
1856: $datatext .= $/;
1857: }
1858: # write file
1859: print $fh $datatext;
1860: close($fh);
1861: # generate gnuplot text
1862: $gnuplot_input.= '"'.$datafilename.'" title "'.
1863: $curve->{'name'}.'" with '.
1864: $curve->{'linestyle'};
1865: if (($curve->{'linestyle'} eq 'points') ||
1866: ($curve->{'linestyle'} eq 'linespoints') ||
1867: ($curve->{'linestyle'} eq 'errorbars') ||
1868: ($curve->{'linestyle'} eq 'xerrorbars') ||
1869: ($curve->{'linestyle'} eq 'yerrorbars') ||
1870: ($curve->{'linestyle'} eq 'xyerrorbars')) {
1871: $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
1872: $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1873: } elsif ($curve->{'linestyle'} eq 'filledcurves') {
1874: $gnuplot_input.= ' '.$curve->{'limit'};
1875: } elsif ($curve->{'linetype'} ne '' &&
1876: $curve->{'linestyle'} eq 'lines') {
1877: $gnuplot_input.= ' linetype ';
1878: $gnuplot_input.= $linetypes{$curve->{'linetype'}};
1879: $gnuplot_input.= ' linecolor rgb "';
1880: # convert color from xaaaaaa to #aaaaaa
1881: $curve->{'color'} =~ s/^x/#/;
1882: $gnuplot_input.= $curve->{'color'}.'"';
1883: }
1884: $gnuplot_input.= ' linewidth '.$curve->{'linewidth'};
1885: }
1886: }
1887: # Write the output to a file.
1888: open (my $fh,">$tmpdir$filename.data");
1889: binmode($fh, ":utf8");
1890: print $fh $gnuplot_input;
1891: close($fh);
1892: # That's all folks.
1893: return ;
1894: }
1895:
1896: #---------------------------------------------- check_inputs
1897: sub check_inputs {
1898: ## Note: no inputs, no outputs - this acts only on global variables.
1899: ## Make sure we have all the input we need:
1900: if (! %Apache::lonplot::plot) { &set_defaults(\%Apache::lonplot::plot,\%gnuplot_defaults); }
1901: if (! %key ) {} # No key for this plot, thats okay
1902: # if (! %axis) { &set_defaults(\%axis,\%axis_defaults); }
1903: if (! defined($title )) {} # No title for this plot, thats okay
1904: if (! defined($xlabel)) {} # No xlabel for this plot, thats okay
1905: if (! defined($ylabel)) {} # No ylabel for this plot, thats okay
1906: if ($#labels < 0) { } # No labels for this plot, thats okay
1907: if ($#curves < 0) {
1908: &Apache::lonxml::warning("No curves specified for plot!!!!");
1909: return '';
1910: }
1911: my $curve;
1912: foreach $curve (@curves) {
1913: if (!defined($curve->{'function'})&&!defined($curve->{'data'})){
1914: &Apache::lonxml::warning("One of the curves specified did not contain any curve data or curve function declarations\n");
1915: return '';
1916: }
1917: }
1918: }
1919:
1920: #------------------------------------------------ make_edit
1921: sub edit_attributes {
1922: my ($target,$token,$defaults,$keys) = @_;
1923: my ($result,@keys);
1924: if ($keys && ref($keys) eq 'ARRAY') {
1925: @keys = @$keys;
1926: } else {
1927: @keys = sort(keys(%$defaults));
1928: }
1929: foreach my $attr (@keys) {
1930: # append a ' ' to the description if it doesn't have one already.
1931: my $description = $defaults->{$attr}->{'description'};
1932: $description .= ' ' if ($description !~ / $/);
1933: if ($defaults->{$attr}->{'edit_type'} eq 'entry') {
1934: $result .= &Apache::edit::text_arg
1935: ($description,$attr,$token,
1936: $defaults->{$attr}->{'size'});
1937: } elsif ($defaults->{$attr}->{'edit_type'} eq 'choice') {
1938: $result .= &Apache::edit::select_or_text_arg
1939: ($description,$attr,$defaults->{$attr}->{'choices'},$token);
1940: } elsif ($defaults->{$attr}->{'edit_type'} eq 'onoff') {
1941: $result .= &Apache::edit::select_or_text_arg
1942: ($description,$attr,['on','off'],$token);
1943: }
1944: $result .= '<br />';
1945: }
1946: return $result;
1947: }
1948:
1949:
1950: ###################################################################
1951: ## ##
1952: ## Insertion functions for editing plots ##
1953: ## ##
1954: ###################################################################
1955:
1956: sub insert_gnuplot {
1957: my $result = '';
1958: # plot attributes
1959: $result .= "\n<gnuplot ";
1960: foreach my $attr (keys(%gnuplot_defaults)) {
1961: $result .= "\n $attr=\"$gnuplot_defaults{$attr}->{'default'}\"";
1962: }
1963: $result .= ">";
1964: # Add the components (most are commented out for simplicity)
1965: # $result .= &insert_key();
1966: # $result .= &insert_axis();
1967: # $result .= &insert_title();
1968: # $result .= &insert_xlabel();
1969: # $result .= &insert_ylabel();
1970: $result .= &insert_curve();
1971: # close up the <gnuplot>
1972: $result .= "\n</gnuplot>";
1973: return $result;
1974: }
1975:
1976: sub insert_tics {
1977: my $result;
1978: $result .= &insert_xtics() . &insert_ytics;
1979: return $result;
1980: }
1981:
1982: sub insert_xtics {
1983: my $result;
1984: $result .= "\n <xtics ";
1985: foreach my $attr (keys(%tic_defaults)) {
1986: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
1987: }
1988: $result .= "/>";
1989: return $result;
1990: }
1991:
1992: sub insert_ytics {
1993: my $result;
1994: $result .= "\n <ytics ";
1995: foreach my $attr (keys(%tic_defaults)) {
1996: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
1997: }
1998: $result .= "/>";
1999: return $result;
2000: }
2001:
2002: sub insert_key {
2003: my $result;
2004: $result .= "\n <key ";
2005: foreach my $attr (keys(%key_defaults)) {
2006: $result .= "\n $attr=\"$key_defaults{$attr}->{'default'}\"";
2007: }
2008: $result .= " />";
2009: return $result;
2010: }
2011:
2012: sub insert_axis{
2013: my $result;
2014: $result .= "\n <axis ";
2015: foreach my $attr (keys(%axis_defaults)) {
2016: $result .= "\n $attr=\"$axis_defaults{$attr}->{'default'}\"";
2017: }
2018: $result .= " />";
2019: return $result;
2020: }
2021:
2022: sub insert_title { return "\n <title></title>"; }
2023: sub insert_xlabel { return "\n <xlabel></xlabel>"; }
2024: sub insert_ylabel { return "\n <ylabel></ylabel>"; }
2025:
2026: sub insert_label {
2027: my $result;
2028: $result .= "\n <label ";
2029: foreach my $attr (keys(%label_defaults)) {
2030: $result .= "\n $attr=\"".
2031: $label_defaults{$attr}->{'default'}."\"";
2032: }
2033: $result .= "></label>";
2034: return $result;
2035: }
2036:
2037: sub insert_curve {
2038: my $result;
2039: $result .= "\n <curve ";
2040: foreach my $attr (keys(%curve_defaults)) {
2041: $result .= "\n $attr=\"".
2042: $curve_defaults{$attr}->{'default'}."\"";
2043: }
2044: $result .= " >";
2045: $result .= &insert_data().&insert_data()."\n </curve>";
2046: }
2047:
2048: sub insert_function {
2049: my $result;
2050: $result .= "\n <function></function>";
2051: return $result;
2052: }
2053:
2054: sub insert_data {
2055: my $result;
2056: $result .= "\n <data></data>";
2057: return $result;
2058: }
2059:
2060: ##----------------------------------------------------------------------
2061: 1;
2062: __END__
2063:
2064:
2065: =head1 NAME
2066:
2067: Apache::lonplot.pm
2068:
2069: =head1 SYNOPSIS
2070:
2071: XML-based plotter of graphs
2072:
2073: This is part of the LearningOnline Network with CAPA project
2074: described at http://www.lon-capa.org.
2075:
2076:
2077: =head1 SUBROUTINES (parsing and edit rendering)
2078:
2079: =over
2080:
2081: =item start_gnuplot()
2082:
2083: =item end_gnuplot()
2084:
2085: =item start_xtics()
2086:
2087: =item end_xtics()
2088:
2089: =item start_ytics()
2090:
2091: =item end_ytics()
2092:
2093: =item get_font()
2094:
2095: =item start_key()
2096:
2097: =item end_key()
2098:
2099: =item parse_label()
2100:
2101: =item replace_entities()
2102:
2103: =item start_title()
2104:
2105: =item end_title()
2106:
2107: =item start_xlabel()
2108:
2109: =item end_xlabel()
2110:
2111: =item start_ylabel()
2112:
2113: =item end_label()
2114:
2115: =item start_curve()
2116:
2117: =item end_curve()
2118:
2119: =item start_function()
2120:
2121: =item end_function()
2122:
2123: =item start_data()
2124:
2125: =item end_data()
2126:
2127: =item start_axis()
2128:
2129: =item end_axis
2130:
2131: =back
2132:
2133: =head1 SUBROUTINES (Utility)
2134:
2135: =over
2136:
2137: =item set_defaults()
2138:
2139: =item get_attributes()
2140:
2141: =item write_gnuplot_file()
2142:
2143: =item check_inputs()
2144:
2145: =item edit_attributes()
2146:
2147: =back
2148:
2149: =head1 SUBROUTINES (Insertion functions for editing plots)
2150:
2151: =over
2152:
2153: =item insert_gnuplot()
2154:
2155: =item insert_tics()
2156:
2157: =item insert_xtics()
2158:
2159: =item insert_key()
2160:
2161: =item insert_axis()
2162:
2163: =item insert_title()
2164:
2165: =item insert_xlabel()
2166:
2167: =item insert_ylabel()
2168:
2169: =item insert_label()
2170:
2171: =item insert_curve()
2172:
2173: =item insert_function()
2174:
2175: =item insert_data()
2176:
2177: =back
2178:
2179: =cut
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