1: # The LearningOnline Network with CAPA
2: # Dynamic plot
3: #
4: # $Id: lonplot.pm,v 1.156 2012/07/03 11:29:57 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:
628: if ($constructtag) {
629: #
630: # The color chooser does not prepent x to the color values
631: # Do that here:
632: #
633: foreach my $attribute ('bgcolor', 'fgcolor') {
634: my $value = $token->[2]{$attribute};
635: if (defined $value && !($value =~ /^x/)) {
636: $token->[2]{$attribute} = 'x' . $value;
637: }
638: }
639: $result = &Apache::edit::rebuild_tag($token);
640: }
641: }
642: return $result;
643: }
644:
645: sub end_gnuplot {
646: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
647: pop @Apache::lonxml::namespace;
648: &Apache::lonxml::deregister('Apache::lonplot',
649: ('title','xlabel','ylabel','key','axis','label','curve'));
650: my $result = '';
651: my $randnumber;
652: my $tmpdir =LONCAPA::tempdir(); # Where temporary files live:
653:
654: # need to call rand everytime start_script would evaluate, as the
655: # safe space rand number generator and the global rand generator
656: # are not separate
657: if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
658: $target eq 'answer') {
659: $randnumber=int(rand(1000));
660: }
661: if ($target eq 'web' || $target eq 'tex') {
662: &check_inputs(); # Make sure we have all the data we need
663: ##
664: ## Determine filename
665: my $filename = $env{'user.name'}.'_'.$env{'user.domain'}.
666: '_'.time.'_'.$$.$randnumber.'_plot';
667: ## Write the plot description to the file
668: &write_gnuplot_file($tmpdir,$filename,$target);
669: $filename = &escape($filename);
670: ## return image tag for the plot
671: if ($target eq 'web') {
672: $result .= <<"ENDIMAGE";
673: <img src = "/cgi-bin/plot.$weboutputformat?file=$filename.data"
674: width = "$Apache::lonplot::plot{'width'}"
675: height = "$Apache::lonplot::plot{'height'}"
676: align = "$Apache::lonplot::plot{'align'}"
677: alt = "$Apache::lonplot::plot{'alttag'}" />
678: ENDIMAGE
679: } elsif ($target eq 'tex') {
680: &Apache::lonxml::debug(" gnuplot wid = $Apache::lonplot::plot{'width'}");
681: &Apache::lonxml::debug(" gnuplot ht = $Apache::lonplot::plot{'height'}");
682: #might be inside the safe space, register the URL for later
683: &Apache::lonxml::register_ssi("/cgi-bin/plot.gif?file=$filename.data&output=eps");
684: $result = "%DYNAMICIMAGE:$Apache::lonplot::plot{'width'}:$Apache::lonplot::plot{'height'}:$Apache::lonplot::plot{'texwidth'}\n";
685: $result .= '\graphicspath{{'.$tmpdir.'}}'."\n";
686: $result .= '\includegraphics[width='.$Apache::lonplot::plot{'texwidth'}.' mm]{'.&unescape($filename).'.eps}';
687: }
688: } elsif ($target eq 'edit') {
689: $result.=&Apache::edit::tag_end($target,$token);
690: }
691: return $result;
692: }
693:
694:
695: ##--------------------------------------------------------------- xtics
696: sub start_xtics {
697: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
698: my $result='';
699: if ($target eq 'web' || $target eq 'tex') {
700: &get_attributes(\%xtics,\%tic_defaults,$parstack,$safeeval,
701: $tagstack->[-1]);
702: } elsif ($target eq 'edit') {
703: $result .= &Apache::edit::tag_start($target,$token,'xtics');
704: $result .= &edit_attributes($target,$token,\%tic_defaults,
705: \@tic_edit_order);
706: } elsif ($target eq 'modified') {
707: my $constructtag=&Apache::edit::get_new_args
708: ($token,$parstack,$safeeval,keys(%tic_defaults));
709: if ($constructtag) {
710: $result = &Apache::edit::rebuild_tag($token);
711: }
712: }
713: return $result;
714: }
715:
716: sub end_xtics {
717: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
718: my $result = '';
719: if ($target eq 'web' || $target eq 'tex') {
720: } elsif ($target eq 'edit') {
721: $result.=&Apache::edit::tag_end($target,$token);
722: }
723: return $result;
724: }
725:
726: ##--------------------------------------------------------------- ytics
727: sub start_ytics {
728: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
729: my $result='';
730: if ($target eq 'web' || $target eq 'tex') {
731: &get_attributes(\%ytics,\%tic_defaults,$parstack,$safeeval,
732: $tagstack->[-1]);
733: } elsif ($target eq 'edit') {
734: $result .= &Apache::edit::tag_start($target,$token,'ytics');
735: $result .= &edit_attributes($target,$token,\%tic_defaults,
736: \@tic_edit_order);
737: } elsif ($target eq 'modified') {
738: my $constructtag=&Apache::edit::get_new_args
739: ($token,$parstack,$safeeval,keys(%tic_defaults));
740: if ($constructtag) {
741: $result = &Apache::edit::rebuild_tag($token);
742: }
743: }
744: return $result;
745: }
746:
747: sub end_ytics {
748: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
749: my $result = '';
750: if ($target eq 'web' || $target eq 'tex') {
751: } elsif ($target eq 'edit') {
752: $result.=&Apache::edit::tag_end($target,$token);
753: }
754: return $result;
755: }
756:
757: ##-----------------------------------------------------------------font
758: my %font_properties =
759: (
760: 'classic' => {
761: face => 'classic',
762: file => 'DejaVuSansMono-Bold',
763: printname => 'Helvetica',
764: tex_no_file => 1,
765: },
766: 'sans-serif' => {
767: face => 'sans-serif',
768: file => 'DejaVuSans',
769: printname => 'DejaVuSans',
770: },
771: 'serif' => {
772: face => 'serif',
773: file => 'DejaVuSerif',
774: printname => 'DejaVuSerif',
775: },
776: );
777:
778: sub get_font {
779: my ($target) = @_;
780: my ($size, $selected_font);
781:
782: if ( $Apache::lonplot::plot{'font'} =~ /^(small|medium|large)/) {
783: $selected_font = $font_properties{'classic'};
784: if ( $Apache::lonplot::plot{'font'} eq 'small') {
785: $size = '5';
786: } elsif ( $Apache::lonplot::plot{'font'} eq 'medium') {
787: $size = '9';
788: } elsif ( $Apache::lonplot::plot{'font'} eq 'large') {
789: $size = '11';
790: } else {
791: $size = '9';
792: }
793: } else {
794: $size = $Apache::lonplot::plot{'font'};
795: $selected_font = $font_properties{$Apache::lonplot::plot{'fontface'}};
796: }
797: if ($target eq 'tex' && defined($Apache::lonplot::plot{'texfont'})) {
798: # $selected_font = $font_properties{'classic'};
799: $size = $Apache::lonplot::plot{'texfont'};
800: }
801: return ($size, $selected_font);
802: }
803:
804: ##----------------------------------------------------------------- key
805: sub start_key {
806: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
807: my $result='';
808: if ($target eq 'web' || $target eq 'tex') {
809: &get_attributes(\%key,\%key_defaults,$parstack,$safeeval,
810: $tagstack->[-1]);
811: } elsif ($target eq 'edit') {
812: $result .= &Apache::edit::tag_start($target,$token,'Plot Key');
813: $result .= &edit_attributes($target,$token,\%key_defaults);
814: } elsif ($target eq 'modified') {
815: my $constructtag=&Apache::edit::get_new_args
816: ($token,$parstack,$safeeval,keys(%key_defaults));
817: if ($constructtag) {
818: $result = &Apache::edit::rebuild_tag($token);
819: }
820: }
821: return $result;
822: }
823:
824: sub end_key {
825: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
826: my $result = '';
827: if ($target eq 'web' || $target eq 'tex') {
828: } elsif ($target eq 'edit') {
829: $result.=&Apache::edit::tag_end($target,$token);
830: }
831: return $result;
832: }
833:
834: sub parse_label {
835: my ($target,$text) = @_;
836: my $parser=HTML::LCParser->new(\$text);
837: my $result;
838: while (my $token=$parser->get_token) {
839: if ($token->[0] eq 'S') {
840: if ($token->[1] eq 'sub') {
841: $result .= '_{';
842: } elsif ($token->[1] eq 'sup') {
843: $result .= '^{';
844: } else {
845: $result .= $token->[4];
846: }
847: } elsif ($token->[0] eq 'E') {
848: if ($token->[1] eq 'sub'
849: || $token->[1] eq 'sup') {
850: $result .= '}';
851: } else {
852: $result .= $token->[2];
853: }
854: } elsif ($token->[0] eq 'T') {
855: $result .= &replace_entities($target,$token->[1]);
856: }
857: }
858: return $result;
859: }
860:
861: #
862: # Note that there are severe restrictions on font selection in the
863: # ps driver now. later in life Gnuplot is supposed to support
864: # utf-8 fonts in the posts script driver. When this happens,
865: # the tex entries with comments that include the word <FIX>
866: # should be changed to print the correct glyphs rather than some
867: # approximation or fallback of what is intended.
868:
869: my %lookup =
870: ( # Greek alphabet:
871:
872: '(Alpha|#913)' => {'tex' => '{/Symbol A}', 'web' => "\x{391}"},
873: '(Beta|#914)' => {'tex' => '{/Symbol B}', 'web' => "\x{392}"},
874: '(Chi|#935)' => {'tex' => '{/Symbol C}', 'web' => "\x{3A7}"},
875: '(Delta|#916)' => {'tex' => '{/Symbol D}', 'web' => "\x{394}"},
876: '(Epsilon|#917)' => {'tex' => '{/Symbol E}', 'web' => "\x{395}"},
877: '(Phi|#934)' => {'tex' => '{/Symbol F}', 'web' => "\x{3A6}"},
878: '(Gamma|#915)' => {'tex' => '{/Symbol G}', 'web' => "\x{393}"},
879: '(Eta|#919)' => {'tex' => '{/Symbol H}', 'web' => "\x{397}"},
880: '(Iota|#921)' => {'tex' => '{/Symbol I}', 'web' => "\x{399}"},
881: '(Kappa|#922)' => {'tex' => '{/Symbol K}', 'web' => "\x{39A}"},
882: '(Lambda|#923)' => {'tex' => '{/Symbol L}', 'web' => "\x{39B}"},
883: '(Mu|#924)' => {'tex' => '{/Symbol M}', 'web' => "\x{39C}"},
884: '(Nu|#925)' => {'tex' => '{/Symbol N}', 'web' => "\x{39D}"},
885: '(Omicron|#927)' => {'tex' => '{/Symbol O}', 'web' => "\x{39F}"},
886: '(Pi|#928)' => {'tex' => '{/Symbol P}', 'web' => "\x{3A0}"},
887: '(Theta|#920)' => {'tex' => '{/Symbol Q}', 'web' => "\x{398}"},
888: '(Rho|#929)' => {'tex' => '{/Symbol R}', 'web' => "\x{3A1}"},
889: '(Sigma|#931)' => {'tex' => '{/Symbol S}', 'web' => "\x{3A3}"},
890: '(Tau|#932)' => {'tex' => '{/Symbol T}', 'web' => "\x{3A4}"},
891: '(Upsilon|#933)' => {'tex' => '{/Symbol U}', 'web' => "\x{3A5}"},
892: '(Omega|#937)' => {'tex' => '{/Symbol W}', 'web' => "\x{3A9}"},
893: '(Xi|#926)' => {'tex' => '{/Symbol X}', 'web' => "\x{39E}"},
894: '(Psi|#936)' => {'tex' => '{/Symbol Y}', 'web' => "\x{3A8}"},
895: '(Zeta|#918)' => {'tex' => '{/Symbol Z}', 'web' => "\x{396}"},
896: '(alpha|#945)' => {'tex' => '{/Symbol a}', 'web' => "\x{3B1}"},
897: '(beta|#946)' => {'tex' => '{/Symbol b}', 'web' => "\x{3B2}"},
898: '(chi|#967)' => {'tex' => '{/Symbol c}', 'web' => "\x{3C7}"},
899: '(delta|#948)' => {'tex' => '{/Symbol d}', 'web' => "\x{3B4}"},
900: '(epsilon|#949)' => {'tex' => '{/Symbol e}', 'web' => "\x{3B5}"},
901: '(phi|#966)' => {'tex' => '{/Symbol f}', 'web' => "\x{3C6}"},
902: '(gamma|#947)' => {'tex' => '{/Symbol g}', 'web' => "\x{3B3}"},
903: '(eta|#951)' => {'tex' => '{/Symbol h}', 'web' => "\x{3B7}"},
904: '(iota|#953)' => {'tex' => '{/Symbol i}', 'web' => "\x{3B9}"},
905: '(kappa|#954)' => {'tex' => '{/Symbol k}', 'web' => "\x{3BA}"},
906: '(lambda|#955)' => {'tex' => '{/Symbol k}', 'web' => "\x{3BB}"},
907: '(mu|#956)' => {'tex' => '{/Symbol m}', 'web' => "\x{3BC}"},
908: '(nu|#957)' => {'tex' => '{/Symbol n}', 'web' => "\x{3BD}"},
909: '(omicron|#959)' => {'tex' => '{/Symbol o}', 'web' => "\x{3BF}"},
910: '(pi|#960)' => {'tex' => '{/Symbol p}', 'web' => "\x{3C0}"},
911: '(theta|#952)' => {'tex' => '{/Symbol q}', 'web' => "\x{3B8}"},
912: '(rho|#961)' => {'tex' => '{/Symbol r}', 'web' => "\x{3C1}"},
913: '(sigma|#963)' => {'tex' => '{/Symbol s}', 'web' => "\x{3C3}"},
914: '(tau|#964)' => {'tex' => '{/Symbol t}', 'web' => "\x{3C4}"},
915: '(upsilon|#965)' => {'tex' => '{/Symbol u}', 'web' => "\x{3C5}"},
916: '(omega|#969)' => {'tex' => '{/Symbol w}', 'web' => "\x{3C9}"},
917: '(xi|#958)' => {'tex' => '{/Symbol x}', 'web' => "\x{3BE}"},
918: '(psi|#968)' => {'tex' => '{/Symbol y}', 'web' => "\x{3C8}"},
919: '(zeta|#950)' => {'tex' => '{/Symbol z}', 'web' => "\x{3B6}"},
920: '(thetasym|#977)' => {'tex' => '{/Symbol \165}', 'web' => "\x{3d1}"},
921: '(upsih|#978)' => {'tex' => '{/Symbol \241}', 'web' => "\x{3d2}"},
922: '(piv|#982)' => {'tex' => '{/Symbol \166}', 'web' => "\x{3d6}"},
923:
924:
925: # Punctuation:
926:
927: '(quot|#034)' => {'tex' => '\42', 'web' => '\42'},
928: '(amp|#038)' => {'tex' => '\46', 'web' => '\46'},
929: '(lt|#060)' => {'tex' => '\74', 'web' => '\74'},
930: '(gt|#062)' => {'tex' => '\76', 'web' => '\76'},
931: '#131' => {'tex' => '{/Symbol \246}', 'web' => "\x{192}"},
932: '#132' => {'tex' => '{/Text \271}', 'web' => "\x{201e}"},
933: '#133' => {'tex' => '{/Symbol \274}', 'web'=> "\x{2026}"},
934: '#134' => {'tex' => '{/Text \262}', 'web' => "\x{2020}"},
935: '#135' => {'tex' => '{/Text \263}', 'web' => "\x{2021}"},
936: '#136' => {'tex' => '\\\\^', 'web' => '\\\\^'},
937: '#137' => {'tex' => '%o', 'web' => "\x{2030}"}, # Per Mille <FIX>
938: '#138' => {'tex' => 'S', 'web' => "\x{160}"}, # S-Caron <FIX>
939: '#139' => {'tex' => '<', 'web' => '<'},
940: '#140' => {'tex' => 'AE', 'web' => "\x{152}"}, # AE ligature <FIX>
941: '#145' => {'tex' => '\140', 'web' => "\x{2018}"},
942: '#146' => {'tex' => '\47', 'web' => "\x{2019}"},
943: '#147' => {'tex' => '\140\140', 'web' => "\x{201c}"}, # Left " <FIX>
944: '#148' => {'tex' => '\47\47', 'web' => '\\"'}, # Right " <FIX>
945: '#149' => {'tex' => '{/Symbol \267}', 'web' => "\x{2022}"},
946: '#150' => {'tex' => '{/Text \55}', 'web' => "\x{2013}"}, # en dash
947: '#151' => {'tex' => '{/Symbol \55}', 'web' => "\x{2014}"}, # em dash
948: '#152' => {'tex' => '\\\\~', 'web' => '\\\\~'},
949: '#153' => {'tex' => '{/Symbol \324}', 'web' => "\x{2122}"}, # trademark
950:
951: # Accented letters, and other furreign language glyphs.
952:
953: '#154' => {'tex' => 's', 'web' => "\x{161}"}, # small s-caron no ps.
954: '#155' => {'tex' => '>', 'web' => '\76'}, # >
955: '#156' => {'tex' => '{/Text \366}', 'web' => "\x{153}"}, # oe ligature.<FIX>
956: '#159', => {'tex' => 'Y', 'web' => "\x{178}"}, # Y-umlaut - can't print <FIX>
957: '(nbsp|#160)' => {'tex' => ' ', 'web' => ' '}, # non breaking space.
958: '(iexcl|#161)' => {'tex' => '{/Text \241}', 'web' => "\x{a1}"}, # inverted !
959: '(cent|#162)' => {'tex' => '{/Text \242}', 'web' => "\x{a2}"}, # Cent currency.
960: '(pound|#163)' => {'tex' => '{/Text \243}', 'web' => "\x{a3}"}, # GB Pound currency.
961: '(curren|#164)' => {'tex' => '{/ZapfDingbats \161}','web' => "\x{a4}"}, # Generic currency symb. <FIX>
962: '(yen|#165)' => {'tex' => '{/Text \245}', 'web' => "\x{a5}"}, # Yen currency.
963: '(brvbar|#166)' => {'tex' => '{/Symbol \174}', 'web' => "\x{a6}"}, # Broken vert bar no print.
964: '(sect|#167)' => {'tex' => '{\247}', 'web' => "\x{a7}"}, # Section symbol.
965: '(uml|#168)' => {'tex' => '{\250}', 'web' => "\x{a8}"}, # 'naked' umlaut.
966: '(copy|#169)' => {'tex' => '{/Symbol \343}', 'web' => "\x{a9}"}, # Copyright symbol.
967: '(ordf|#170)' => {'tex' => '{/Text \343}', 'web' => "\x{aa}"}, # Feminine ordinal.
968: '(laquo|#171)' => {'tex' => '{/Text \253}', 'web' => "\x{ab}"}, # << quotes.
969: '(not|#172)' => {'tex' => '\254', 'web' => "\x{ac}"}, # Logical not.
970: '(shy|#173)' => {'tex' => '\255', 'web' => "\x{ad}"}, # soft hyphen.
971: '(reg|#174)' => {'tex' => '{/Symbol \342}', 'web' => "\x{ae}"}, # Registered tm.
972: '(macr|#175)' => {'tex' => '^{\255}', 'web' => "\x{af}"}, # 'naked' macron (overbar).
973: '(deg|#176)' => {'tex' => '{/Text \260}', 'web' => "\x{b0}"}, # Degree symbo..`
974: '(plusmn|#177)' => {'tex' => '{/Symbol \261}', 'web' => "\x{b1}"}, # +/- symbol.
975: '(sup2|#178)' => {'tex' => '^2', 'web' => "\x{b2}"}, # Superscript 2.
976: '(sup3|#179)' => {'tex' => '^3', 'web' => "\x{b3}"}, # Superscript 3.
977: '(acute|#180)' => {'tex' => '{/Text \222}', 'web' => "\x{b4}"}, # 'naked' acute accent.
978: '(micro|#181)' => {'tex' => '{/Symbol \155}', 'web' => "\x{b5}"}, # Micro (small mu).
979: '(para|#182)' => {'tex' => '{/Text \266}', 'web' => "\x{b6}"}, # Paragraph symbol.
980: '(middot|#183)' => {'tex' => '\267', 'web' => "\x{b7}"}, # middle dot
981: '(cedil|#184)' => {'tex' => '\233', 'web' => "\x{b8}"}, # 'naked' cedilla.
982: '(sup1|#185)' => {'tex' => '^1', 'web' => "\x{b9}"}, # superscript 1.
983: '(ordm|#186)' => {'tex' => '{\260}', 'web' => "\x{ba}"}, # masculine ordinal.
984: '(raquo|#187)', => {'tex' => '\273', 'web' => "\x{bb}"}, # Right angle quotes.
985: '(frac14|#188)' => {'tex' => '\274', 'web' => "\x{bc}"}, # 1/4.
986: '(frac12|#189)' => {'tex' => '\275', 'web' => "\x{bd}"}, # 1/2.
987: '(frac34|#190)' => {'tex' => '\276', 'web' => "\x{be}"}, # 3/4
988: '(iquest|#191)' => {'tex' => '{/Text \277}', 'web' => "\x{bf}"}, # Inverted ?
989: '(Agrave|#192)' => {'tex' => '\300', 'web' => "\x{c0}"}, # A Grave.
990: '(Aacute|#193)' => {'tex' => '\301', 'web' => "\x{c1}"}, # A Acute.
991: '(Acirc|#194)' => {'tex' => '\302', 'web' => "\x{c2}"}, # A Circumflex.
992: '(Atilde|#195)' => {'tex' => '\303', 'web' => "\x{c3}"}, # A tilde.
993: '(Auml|#196)' => {'tex' => '\304', 'web' => "\x{c4}"}, # A umlaut.
994: '(Aring|#197)' => {'tex' => '\305', 'web' => "\x{c5}"}, # A ring.
995: '(AElig|#198)' => {'tex' => '\306', 'web' => "\x{c6}"}, # AE ligature.
996: '(Ccedil|#199)' => {'tex' => '\307', 'web' => "\x{c7}"}, # C cedilla
997: '(Egrave|#200)' => {'tex' => '\310', 'web' => "\x{c8}"}, # E Accent grave.
998: '(Eacute|#201)' => {'tex' => '\311', 'web' => "\x{c9}"}, # E acute accent.
999: '(Ecirc|#202)' => {'tex' => '\312', 'web' => "\x{ca}"}, # E Circumflex.
1000: '(Euml|#203)' => {'tex' => '\313', 'web' => "\x{cb}"}, # E umlaut.
1001: '(Igrave|#204)' => {'tex' => '\314', 'web' => "\x{cc}"}, # I grave accent.
1002: '(Iacute|#205)' => {'tex' => '\315', 'web' => "\x{cd}"}, # I acute accent.
1003: '(Icirc|#206)' => {'tex' => '\316', 'web' => "\x{ce}"}, # I circumflex.
1004: '(Iuml|#207)' => {'tex' => '\317', 'web' => "\x{cf}"}, # I umlaut.
1005: '(ETH|#208)' => {'tex' => '\320', 'web' => "\x{d0}"}, # Icelandic Cap eth.
1006: '(Ntilde|#209)' => {'tex' => '\321', 'web' => "\x{d1}"}, # Ntilde (enyan).
1007: '(Ograve|#210)' => {'tex' => '\322', 'web' => "\x{d2}"}, # O accent grave.
1008: '(Oacute|#211)' => {'tex' => '\323', 'web' => "\x{d3}"}, # O accent acute.
1009: '(Ocirc|#212)' => {'tex' => '\324', 'web' => "\x{d4}"}, # O circumflex.
1010: '(Otilde|#213)' => {'tex' => '\325', 'web' => "\x{d5}"}, # O tilde.
1011: '(Ouml|#214)' => {'tex' => '\326', 'web' => "\x{d6}"}, # O umlaut.
1012: '(times|#215)' => {'tex' => '\327', 'web' => "\x{d7}"}, # Times symbol.
1013: '(Oslash|#216)' => {'tex' => '\330', 'web' => "\x{d8}"}, # O slash.
1014: '(Ugrave|#217)' => {'tex' => '\331', 'web' => "\x{d9}"}, # U accent grave.
1015: '(Uacute|#218)' => {'tex' => '\332', 'web' => "\x{da}"}, # U accent acute.
1016: '(Ucirc|#219)' => {'tex' => '\333', 'web' => "\x{db}"}, # U circumflex.
1017: '(Uuml|#220)' => {'tex' => '\334', 'web' => "\x{dc}"}, # U umlaut.
1018: '(Yacute|#221)' => {'tex' => '\335', 'web' => "\x{dd}"}, # Y accent acute.
1019: '(THORN|#222)' => {'tex' => '\336', 'web' => "\x{de}"}, # Icelandic thorn.
1020: '(szlig|#223)' => {'tex' => '\337', 'web' => "\x{df}"}, # German sharfes s.
1021: '(agrave|#224)' => {'tex' => '\340', 'web' => "\x{e0}"}, # a accent grave.
1022: '(aacute|#225)' => {'tex' => '\341', 'web' => "\x{e1}"}, # a grave.
1023: '(acirc|#226)' => {'tex' => '\342', 'web' => "\x{e2}"}, # a circumflex.
1024: '(atilde|#227)' => {'tex' => '\343', 'web' => "\x{e3}"}, # a tilde.
1025: '(auml|#228)' => {'tex' => '\344', 'web' => "\x{e4}"}, # a umlaut
1026: '(aring|#229)' => {'tex' => '\345', 'web' => "\x{e5}"}, # a ring on top.
1027: '(aelig|#230)' => {'tex' => '\346', 'web' => "\x{e6}"}, # ae ligature.
1028: '(ccedil|#231)' => {'tex' => '\347', 'web' => "\x{e7}"}, # C cedilla
1029: '(egrave|#232)' => {'tex' => '\350', 'web' => "\x{e8}"}, # e accent grave.
1030: '(eacute|#233)' => {'tex' => '\351', 'web' => "\x{e9}"}, # e accent acute.
1031: '(ecirc|#234)' => {'tex' => '\352', 'web' => "\x{ea}" }, # e circumflex.
1032: '(euml|#235)' => {'tex' => '\353', 'web' => "\x{eb}"}, # e umlaut.
1033: '(igrave|#236)' => {'tex' => '\354', 'web' => "\x{ec}"}, # i grave.
1034: '(iacute|#237)' => {'tex' => '\355', 'web' => "\x{ed}"}, # i acute.
1035: '(icirc|#238)' => {'tex' => '\356', 'web' => "\x{ee}"}, # i circumflex.
1036: '(iuml|#239)' => {'tex' => '\357', 'web' => "\x{ef}"}, # i umlaut.
1037: '(eth|#240)' => {'tex' => '\360', 'web' => "\x{f0}"}, # Icelandic eth.
1038: '(ntilde|#241)' => {'tex' => '\361', 'web' => "\x{f1}"}, # n tilde.
1039: '(ograve|#242)' => {'tex' => '\362', 'web' => "\x{f2}"}, # o grave.
1040: '(oacute|#243)' => {'tex' => '\363', 'web' => "\x{f3}"}, # o acute.
1041: '(ocirc|#244)' => {'tex' => '\364', 'web' => "\x{f4}"}, # o circumflex.
1042: '(otilde|#245)' => {'tex' => '\365', 'web' => "\x{f5}"}, # o tilde.
1043: '(ouml|#246)' => {'tex' => '\366', 'web' => "\x{f6}"}, # o umlaut.
1044: '(divide|#247)' => {'tex' => '\367', 'web' => "\x{f7}"}, # division symbol
1045: '(oslash|#248)' => {'tex' => '\370', 'web' => "\x{f8}"}, # o slashed.
1046: '(ugrave|#249)' => {'tex' => '\371', 'web' => "\x{f9}"}, # u accent grave.
1047: '(uacute|#250)' => {'tex' => '\372', 'web' => "\x{fa}"}, # u acute.
1048: '(ucirc|#251)' => {'tex' => '\373', 'web' => "\x{fb}"}, # u circumflex.
1049: '(uuml|#252)' => {'tex' => '\374', 'web' => "\x{fc}"}, # u umlaut.
1050: '(yacute|#253)' => {'tex' => '\375', 'web' => "\x{fd}"}, # y acute accent.
1051: '(thorn|#254)' => {'tex' => '\376', 'web' => "\x{fe}"}, # small thorn (icelandic).
1052: '(yuml|#255)' => {'tex' => '\377', 'web' => "\x{ff}"}, # y umlaut.
1053:
1054: # Latin extended A entities:
1055:
1056: '(OElig|#338)' => {'tex' => '{/Text \326}', 'web' => "\x{152}"}, # OE ligature.
1057: '(oelig|#339)' => {'tex' => '{/Text \366}', 'web' => "\x{153}"}, # oe ligature.
1058: '(Scaron|#352)' => {'tex' => 'S', 'web' => "\x{160}"}, # S caron no printable.
1059: '(scaron|#353)' => {'tex' => 's', 'web' => "\x{161}"}, # s caron no printable.
1060: '(Yuml|#376)' => {'tex' => 'Y', 'web' => "\x{178}"}, # Y umlaut - no printable.
1061:
1062: # Latin extended B.
1063:
1064: '(fnof|#402)' => {'tex' =>'{/Symbol \246}', 'web' => "\x{192}"}, # f with little hook.
1065:
1066: # Standalone accents:
1067:
1068: '(circ|#710)' => {'tex' => '^', 'web' => '^'}, # circumflex.
1069: '(tilde|#732)' => {'tex' => '~', 'web' => '~'}, # tilde.
1070:
1071: # General punctuation. We're not able to make a distinction between
1072: # the various length spacings in the print version. (e.g. en/em/thin).
1073: # the various joiners will be empty strings in the print version too.
1074:
1075:
1076: '(ensp|#8194)' => {'tex' => ' ', 'web' => "\x{2002}"}, # en space.
1077: '(emsp|#8195)' => {'tex' => ' ', 'web' => "\x{2003}"}, # em space.
1078: '(thinsp|#8201)' => {'tex' => ' ', 'web' => "\x{2009}"}, # thin space.
1079: '(zwnj|#8204)' => {'tex' => ' ', 'web' => "\x{200c}"}, # Zero width non joiner.
1080: '(zwj|#8205)' => {'tex' => ' ', 'web' => "\x{200d}"}, # Zero width joiner.
1081: '(lrm|#8206)' => {'tex' => ' ', 'web' => "\x{200e}"}, # Left to right mark
1082: '(rlm|#8207)' => {'tex' => ' ', 'web' => "\x{200f}"}, # right to left mark.
1083: '(ndash|#8211)' => {'tex' => '{/Text \55}', 'web' => "\x{2013}"}, # en dash.
1084: '(mdash|#8212)' => {'tex' => '{/Symbol \55}', 'web' => "\x{2014}"}, # em dash.
1085: '(lsquo|#8216)' => {'tex' => '{/Text \140}', 'web' => "\x{2018}"}, # Left single quote.
1086: '(rsquo|#8217)' => {'tex' => '\47', 'web' => "\x{2019}"}, # Right single quote.
1087: '(sbquo|#8218)' => {'tex' => '\54', 'web' => "\x{201a}"}, # Single low-9 quote.
1088: '(ldquo|#8220)' => {'tex' => '\42', 'web' => "\x{201c}"}, # Left double quote.
1089: '(rdquo|#8221)' => {'tex' => '\42', 'web' => "\x{201d}"}, # Right double quote.
1090: '(bdquo|#8222)' => {'tex' => ',', 'web' => "\x{201e}"}, # Double low-9 quote.
1091: '(dagger|#8224)' => {'tex' => '+', 'web' => "\x{2020}"}, # Is this a dagger I see before me now?
1092: '(Dagger|#8225)' => {'tex' => '\261', 'web' => "\x{2021}"}, # it's handle pointing towards my heart?
1093: '(bull|#8226)' => {'tex' => '\267', 'web' => "\x{2022}"}, # Bullet.
1094: '(hellep|#8230)' => {'tex' => '{/Symbol \274}', 'web' => "\x{2026}"}, # Ellipses.
1095: '(permil|#8240)' => {'tex' => '%_o', 'web' => "\x{2031}"}, # Per mille.
1096: '(prime|#8242)' => {'tex' => '\264', 'web' => "\x{2032}"}, # Prime.
1097: '(Prime|#8243)' => {'tex' => '{/Symbol \262}', 'web' => "\x{2033}"}, # double prime.
1098: '(lsaquo|#8249)' => {'tex' => '<', 'web' => "\x{2039}"}, # < quote.
1099: '(rsaquo|#8250)' => {'tex' => '\74', 'web' => "\x{203a}"}, # > quote.
1100: '(oline|#8254)' => {'tex' => '{/Symbol \140}', 'web' => "\x{203e}"}, # Overline.
1101: '(frasl|#8260)' => {'tex' => '/', 'web' => "\x{2044}"}, # Fraction slash.
1102: '(euro|#8364)' => {'tex' => '{/Symbol \240}', 'web' => "\x{20ac}"}, # Euro currency.
1103:
1104: # Letter like symbols.
1105:
1106: '(weierp|#8472)' => {'tex' => '{/Symbol \303}', 'web' => "\x{2118}"}, # Power set symbol
1107: '(image|#8465)' => {'tex' => '{/Symbol \301}', 'web' => "\x{2111}"}, # Imaginary part
1108: '(real|#8476)' => {'tex' => '{/Symbol \302}', 'web' => "\x{211c}"}, # Real part.
1109: '(trade|#8482)' => {'tex' => '{/Symbol \344}', 'web' => "\x{2122}"}, # trademark symbol.
1110: '(alefsym|#8501)' => {'tex' => '{/Symbol \300}', 'web' => "\x{2135}"}, # Hebrew alef.
1111:
1112: # Arrows of various types and directions.
1113: '(larr|#8592)' => {'tex' => '{/Symbol \254}', 'web' => "\x{2190}"}, # <--
1114: '(uarr|#8593)' => {'tex' => '{/Symbol \255}', 'web' => "\x{2191}"}, # up arrow.
1115: '(rarr|#8594)' => {'tex' => '{/Symbol \256}', 'web' => "\x{2192}"}, # -->
1116: '(darr|#8595)' => {'tex' => '{/Symbol \257}', 'web' => "\x{2193}"}, # down arrow.
1117: '(harr|#8596)' => {'tex' => '{/Symbol \253}', 'web' => "\x{2194}"}, # <-->
1118: '(crarr|#8629)' => {'tex' => '{/Symbol \277}', 'web' => "\x{21b5}"}, # corner arrow down and right.
1119: '(lArr|#8656)' => {'tex' => '{/Symbol \334}', 'web' => "\x{21d0}"}, # <==
1120: '(uArr|#8657)' => {'tex' => '{/Symbol \335}', 'web' => "\x{21d1}"}, # Up double arrow.
1121: '(rArr|#8658)' => {'tex' => '{/Symbol \336}', 'web' => "\x{21d2}"}, # ==>
1122: '(dArr|#8659)' => {'tex' => '{/Symbol \337}', 'web' => "\x{21d3}"}, # Down double arrow.
1123: '(hArr|#8660)' => {'tex' => '{/Symbol \333}', 'web' => "\x{21d4}"}, # <==>
1124:
1125: # Mathematical operators. For some of these we do the best we can in printing.
1126:
1127: '(forall|#8704)' => {'tex' => '{/Symbol \42}', 'web' => "\x{2200}"}, # For all.
1128: '(part|#8706)' => {'tex' => '{/Symbol d}', 'web' => "\x{2202}"}, # partial derivative
1129: '(exist|#8707)' => {'tex' => '{/Symbol \44}', 'web' => "\x{2203}"}, # There exists.
1130: '(empty|#8709)' => {'tex' => '{/Symbol \306}', 'web' => "\x{2205}"}, # Null set.
1131: '(nabla|#8711)' => {'tex' => '{/Symbol \321}', 'web' => "\x{2207}"}, # Gradient e.g.
1132: '(isin|#8712)' => {'tex' => '{/Symbol \316}', 'web' => "\x{2208}"}, # Element of the set.
1133: '(notin|#8713)' => {'tex' => '{/Symbol \317}', 'web' => "\x{2209}"}, # Not an element of
1134: '(ni|#8715)' => {'tex' => '{/Symbol \47}', 'web' => "\x{220b}"}, # Contains as a member
1135: '(prod|#8719)' => {'tex' => '{/Symbol \325}', 'web' => "\x{220f}"}, # Product
1136: '(sum|#8721)' => {'tex' => '{/Symbol \345}', 'web' => "\x{2211}"}, # Sum of.
1137: '(minus|#8722)' => {'tex' => '{/Symbol \55}', 'web' => "\x{2212}"}, # - sign.
1138: '(lowast|#8727)' => {'tex' => '*', 'web' => "\x{2217}"}, # *
1139: '(radic|#8730)' => {'tex' => '{/Symbol \326}', 'web' => "\x{221a}"}, # Square root.
1140: '(prop|#8733)' => {'tex' => '{/Symbol \265}', 'web' => "\x{221d}"}, # Proportional to.
1141: '(infin|#8734)' => {'tex' => '{/Symbol \245}', 'web' => "\x{221e}"}, # Infinity.
1142: '(ang|#8736)' => {'tex' => '{/Symbol \320}', 'web' => "\x{2220}"}, # Angle .
1143: '(and|#8743)' => {'tex' => '{/Symbol \331}', 'web' => "\x{2227}"}, # Logical and.
1144: '(or|#8744)' => {'tex' => '{/Symbol \332}', 'web' => "\x{2228}"}, # Logical or.
1145: '(cap|#8745)' => {'tex' => '{/Symbol \307}', 'web' => "\x{2229}"}, # Set intersection.
1146: '(cup|#8746)' => {'tex' => '{/Symbol \310}', 'web' => "\x{222a}"}, # Set union.
1147: '(int|8747)' => {'tex' => '{/Symbol \362}', 'web' => "\x{222b}"}, # Integral.
1148:
1149: # Some gnuplot guru will have to explain to me why the next three
1150: # require the extra slashes... else they print very funkily.
1151:
1152: '(there4|#8756)' => {'tex' => '{/Symbol \\\134}', 'web' => "\x{2234}"}, # Therefore triple dots.
1153: '(sim|#8764)' => {'tex' => '\\\176', 'web' => "\x{223c}"}, # Simlar to.
1154: '(cong|#8773)' => {'tex' => '{/Symbol \\\100}','web' => "\x{2245}"}, # Congruent to/with.
1155:
1156: '(asymp|#8776)' => {'tex' => '{/Symbol \273}', 'web' => "\x{2248}"}, # Asymptotic to.
1157: '(ne|#8800)' => {'tex' => '{/Symbol \271}', 'web' => "\x{2260}"}, # not equal to.
1158: '(equiv|#8801)' => {'tex' => '{/Symbol \272}', 'web' => "\x{2261}"}, # Equivalent to.
1159: '(le|8804)' => {'tex' => '{/Symbol \243}', 'web' => "\x{2264}"}, # Less than or equal to.
1160: '(ge|8805)' => {'tex' => '{/Symbol \263}', 'web' => "\x{2265}"}, # Greater than or equal to
1161: '(sub|8834)' => {'tex' => '{/Symbol \314}', 'web' => "\x{2282}"}, # Subset of.
1162: '(sup|8835)' => {'tex' => '{/Symbol \311}', 'web' => "\x{2283}"}, # Super set of.
1163: '(nsub|8836)' => {'tex' => '{/Symbol \313}', 'web' => "\x{2284}"}, # not subset of.
1164: '(sube|8838)' => {'tex' => '{/Symbol \315}', 'web' => "\x{2286}"}, # Subset or equal.
1165: '(supe|8839)' => {'tex' => '{/Symbol \312}', 'web' => "\x{2287}"}, # Superset or equal
1166: '(oplus|8853)' => {'tex' => '{/Symbol \305}', 'web' => "\x{2295}"}, # O with plus inside
1167: '(otimes|8855)' => {'tex' => '{/Symbol \304}', 'web' => "\x{2297}"}, # O with times.
1168: '(perp|8869)' => {'tex' => '{/Symbol \136}', 'web' => "\x{22a5}"}, # Perpendicular.
1169: '(sdot|8901)' => {'tex' => '{/Symbol \227}', 'web' => "\x{22c5}"}, # Dot operator.
1170:
1171: # Misc. technical symbols:
1172:
1173: '(lceil|8698)' => {'tex' => '{/Symbol \351}', 'web' => "\x{2308}"}, # Left ceiling.
1174: '(rceil|8969)' => {'tex' => '{/Symbol \371}', 'web' => "\x{2309}"}, # Right ceiling.
1175: '(lfloor|8970)' => {'tex' => '{/Symbol \353}', 'web' => "\x{230a}"}, # Left floor.
1176: '(rfloor|8971)' => {'tex' => '{/Symbol \373}', 'web' => "\x{230b}"}, # Right floor.
1177:
1178: # The gnuplot png font evidently does not have the big angle brackets at
1179: # positions 0x2329, 0x232a so use ordinary brackets.
1180:
1181: '(lang|9001)' => {'tex' => '{/Symbol \341}', 'web' => '<'}, # Left angle bracket.
1182: '(rang|9002)' => {'tex' => '{/Symbol \361}', 'web' => '>'}, # Right angle bracket.
1183:
1184: # Gemoetric shapes.
1185:
1186: '(loz|9674)' => {'tex' => '{/Symbol \340}', 'web' => "\x{25ca}"}, # Lozenge.
1187:
1188: # Misc. symbols
1189:
1190: '(spades|9824)' => {'tex' => '{/Symbol \252}', 'web' => "\x{2660}"},
1191: '(clubs|9827)' => {'tex' => '{/Symbol \247}', 'web' => "\x{2663}"},
1192: '(hearts|9829)' => {'tex' => '{/Symbol \251}', 'web' => "\x{2665}"},
1193: '(diams|9830)' => {'tex' => '{/Symbol \250}', 'web' => "\x{2666}"}
1194:
1195: );
1196:
1197:
1198: sub replace_entities {
1199: my ($target,$text) = @_;
1200: $text =~ s{([_^~\{\}]|\\\\)}{\\\\$1}g;
1201: while (my ($re, $replace) = each(%lookup)) {
1202: my $repl = $replace->{$target};
1203: $text =~ s/&$re;/$replace->{$target}/g;
1204: }
1205: $text =~ s{(&)}{\\\\$1}g;
1206: return $text;
1207: }
1208:
1209: ##------------------------------------------------------------------- title
1210: sub start_title {
1211: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1212: my $result='';
1213: if ($target eq 'web' || $target eq 'tex') {
1214: $title = &Apache::lonxml::get_all_text("/title",$parser,$style);
1215: $title=&Apache::run::evaluate($title,$safeeval,$$parstack[-1]);
1216: $title =~ s/\n/ /g;
1217: if (length($title) > $max_str_len) {
1218: $title = substr($title,0,$max_str_len);
1219: }
1220: $title = &parse_label($target,$title);
1221: } elsif ($target eq 'edit') {
1222: $result.=&Apache::edit::tag_start($target,$token,'Plot Title');
1223: my $text=&Apache::lonxml::get_all_text("/title",$parser,$style);
1224: $result.=&Apache::edit::editline('',$text,'',60);
1225: } elsif ($target eq 'modified') {
1226: $result.=&Apache::edit::rebuild_tag($token);
1227: $result.=&Apache::edit::modifiedfield("/title",$parser);
1228: }
1229: return $result;
1230: }
1231:
1232: sub end_title {
1233: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1234: my $result = '';
1235: if ($target eq 'web' || $target eq 'tex') {
1236: } elsif ($target eq 'edit') {
1237: $result.=&Apache::edit::tag_end($target,$token);
1238: }
1239: return $result;
1240: }
1241: ##------------------------------------------------------------------- xlabel
1242: sub start_xlabel {
1243: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1244: my $result='';
1245: if ($target eq 'web' || $target eq 'tex') {
1246: $xlabel = &Apache::lonxml::get_all_text("/xlabel",$parser,$style);
1247: $xlabel=&Apache::run::evaluate($xlabel,$safeeval,$$parstack[-1]);
1248: $xlabel =~ s/\n/ /g;
1249: if (length($xlabel) > $max_str_len) {
1250: $xlabel = substr($xlabel,0,$max_str_len);
1251: }
1252: $xlabel = &parse_label($target,$xlabel);
1253: } elsif ($target eq 'edit') {
1254: $result.=&Apache::edit::tag_start($target,$token,'Plot Xlabel');
1255: my $text=&Apache::lonxml::get_all_text("/xlabel",$parser,$style);
1256: $result.=&Apache::edit::editline('',$text,'',60);
1257: } elsif ($target eq 'modified') {
1258: $result.=&Apache::edit::rebuild_tag($token);
1259: $result.=&Apache::edit::modifiedfield("/xlabel",$parser);
1260: }
1261: return $result;
1262: }
1263:
1264: sub end_xlabel {
1265: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1266: my $result = '';
1267: if ($target eq 'web' || $target eq 'tex') {
1268: } elsif ($target eq 'edit') {
1269: $result.=&Apache::edit::tag_end($target,$token);
1270: }
1271: return $result;
1272: }
1273:
1274: ##------------------------------------------------------------------- ylabel
1275: sub start_ylabel {
1276: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1277: my $result='';
1278: if ($target eq 'web' || $target eq 'tex') {
1279: $ylabel = &Apache::lonxml::get_all_text("/ylabel",$parser,$style);
1280: $ylabel = &Apache::run::evaluate($ylabel,$safeeval,$$parstack[-1]);
1281: $ylabel =~ s/\n/ /g;
1282: if (length($ylabel) > $max_str_len) {
1283: $ylabel = substr($ylabel,0,$max_str_len);
1284: }
1285: $ylabel = &parse_label($target,$ylabel);
1286: } elsif ($target eq 'edit') {
1287: $result .= &Apache::edit::tag_start($target,$token,'Plot Ylabel');
1288: my $text = &Apache::lonxml::get_all_text("/ylabel",$parser,$style);
1289: $result .= &Apache::edit::editline('',$text,'',60);
1290: } elsif ($target eq 'modified') {
1291: $result.=&Apache::edit::rebuild_tag($token);
1292: $result.=&Apache::edit::modifiedfield("/ylabel",$parser);
1293: }
1294: return $result;
1295: }
1296:
1297: sub end_ylabel {
1298: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1299: my $result = '';
1300: if ($target eq 'web' || $target eq 'tex') {
1301: } elsif ($target eq 'edit') {
1302: $result.=&Apache::edit::tag_end($target,$token);
1303: }
1304: return $result;
1305: }
1306:
1307: ##------------------------------------------------------------------- label
1308: sub start_label {
1309: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1310: my $result='';
1311: if ($target eq 'web' || $target eq 'tex') {
1312: my %label;
1313: &get_attributes(\%label,\%label_defaults,$parstack,$safeeval,
1314: $tagstack->[-1]);
1315: my $text = &Apache::lonxml::get_all_text("/label",$parser,$style);
1316: $text = &Apache::run::evaluate($text,$safeeval,$$parstack[-1]);
1317: $text =~ s/\n/ /g;
1318: $text = substr($text,0,$max_str_len) if (length($text) > $max_str_len);
1319: $label{'text'} = &parse_label($target,$text);
1320: push(@labels,\%label);
1321: } elsif ($target eq 'edit') {
1322: $result .= &Apache::edit::tag_start($target,$token,'Plot Label');
1323: $result .= &edit_attributes($target,$token,\%label_defaults);
1324: my $text = &Apache::lonxml::get_all_text("/label",$parser,$style);
1325: $result .= &Apache::edit::end_row().
1326: &Apache::edit::start_spanning_row().
1327: &Apache::edit::editline('',$text,'',60);
1328: } elsif ($target eq 'modified') {
1329: &Apache::edit::get_new_args
1330: ($token,$parstack,$safeeval,keys(%label_defaults));
1331: $result.=&Apache::edit::rebuild_tag($token);
1332: $result.=&Apache::edit::modifiedfield("/label",$parser);
1333: }
1334: return $result;
1335: }
1336:
1337: sub end_label {
1338: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1339: my $result = '';
1340: if ($target eq 'web' || $target eq 'tex') {
1341: } elsif ($target eq 'edit') {
1342: $result.=&Apache::edit::tag_end($target,$token);
1343: }
1344: return $result;
1345: }
1346:
1347: ##------------------------------------------------------------------- curve
1348: sub start_curve {
1349: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1350: my $result='';
1351: &Apache::lonxml::register('Apache::lonplot',('function','data'));
1352: push (@Apache::lonxml::namespace,'curve');
1353: if ($target eq 'web' || $target eq 'tex') {
1354: my %curve;
1355: &get_attributes(\%curve,\%curve_defaults,$parstack,$safeeval,
1356: $tagstack->[-1]);
1357: push (@curves,\%curve);
1358: } elsif ($target eq 'edit') {
1359: $result .= &Apache::edit::tag_start($target,$token,'Curve');
1360: $result .= &edit_attributes($target,$token,\%curve_defaults,
1361: \@curve_edit_order)
1362: .&Apache::edit::end_row()
1363: .&Apache::edit::start_spanning_row();
1364:
1365: } elsif ($target eq 'modified') {
1366: my $constructtag=&Apache::edit::get_new_args
1367: ($token,$parstack,$safeeval,keys(%curve_defaults));
1368: if ($constructtag) {
1369: #
1370: # Fix up the color attribute as jcolor does not prepend an x
1371: #
1372: my $value = $token->[2]{'color'};
1373: if (defined $value && !($value =~ /^x/)) {
1374: $token->[2]{'color'} = 'x' . $value;
1375: }
1376: $result = &Apache::edit::rebuild_tag($token);
1377: }
1378: }
1379: return $result;
1380: }
1381:
1382: sub end_curve {
1383: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1384: my $result = '';
1385: pop @Apache::lonxml::namespace;
1386: &Apache::lonxml::deregister('Apache::lonplot',('function','data'));
1387: if ($target eq 'web' || $target eq 'tex') {
1388: } elsif ($target eq 'edit') {
1389: $result.=&Apache::edit::tag_end($target,$token);
1390: }
1391: return $result;
1392: }
1393:
1394: ##------------------------------------------------------------ curve function
1395: sub start_function {
1396: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1397: my $result='';
1398: if ($target eq 'web' || $target eq 'tex') {
1399: if (exists($curves[-1]->{'data'})) {
1400: &Apache::lonxml::warning
1401: ('Use of the <b>curve function</b> tag precludes use of '.
1402: ' the <b>curve data</b> tag. '.
1403: 'The curve data tag will be omitted in favor of the '.
1404: 'curve function declaration.');
1405: delete $curves[-1]->{'data'} ;
1406: }
1407: my $function = &Apache::lonxml::get_all_text("/function",$parser,
1408: $style);
1409: $function = &Apache::run::evaluate($function,$safeeval,$$parstack[-1]);
1410: $function=~s/\^/\*\*/gs;
1411: $curves[-1]->{'function'} = $function;
1412: } elsif ($target eq 'edit') {
1413: $result .= &Apache::edit::tag_start($target,$token,'Gnuplot compatible curve function');
1414: my $text = &Apache::lonxml::get_all_text("/function",$parser,$style);
1415: $result .= &Apache::edit::editline('',$text,'',60);
1416: } elsif ($target eq 'modified') {
1417: $result.=&Apache::edit::rebuild_tag($token);
1418: $result.=&Apache::edit::modifiedfield("/function",$parser);
1419: }
1420: return $result;
1421: }
1422:
1423: sub end_function {
1424: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1425: my $result = '';
1426: if ($target eq 'web' || $target eq 'tex') {
1427: } elsif ($target eq 'edit') {
1428: $result .= &Apache::edit::end_table();
1429: }
1430: return $result;
1431: }
1432:
1433: ##------------------------------------------------------------ curve data
1434: sub start_data {
1435: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1436: my $result='';
1437: if ($target eq 'web' || $target eq 'tex') {
1438: if (exists($curves[-1]->{'function'})) {
1439: &Apache::lonxml::warning
1440: ('Use of the <b>curve function</b> tag precludes use of '.
1441: ' the <b>curve data</b> tag. '.
1442: 'The curve function tag will be omitted in favor of the '.
1443: 'curve data declaration.');
1444: delete($curves[-1]->{'function'});
1445: }
1446: my $datatext = &Apache::lonxml::get_all_text("/data",$parser,$style);
1447: $datatext=&Apache::run::evaluate($datatext,$safeeval,$$parstack[-1]);
1448: # Deal with cases where we're given an array...
1449: if ($datatext =~ /^\@/) {
1450: $datatext = &Apache::run::run('return "'.$datatext.'"',
1451: $safeeval,1);
1452: }
1453: $datatext =~ s/\s+/ /g;
1454: # Need to do some error checking on the @data array -
1455: # make sure it's all numbers and make sure each array
1456: # is of the same length.
1457: my @data;
1458: if ($datatext =~ /,/) { # comma deliminated
1459: @data = split /,/,$datatext;
1460: } else { # Assume it's space separated.
1461: @data = split / /,$datatext;
1462: }
1463: for (my $i=0;$i<=$#data;$i++) {
1464: # Check that it's non-empty
1465: if (! defined($data[$i])) {
1466: &Apache::lonxml::warning(
1467: 'undefined curve data value. Replacing with '.
1468: ' pi/e = 1.15572734979092');
1469: $data[$i] = 1.15572734979092;
1470: }
1471: # Check that it's a number
1472: if (! &$real_test($data[$i]) & ! &$int_test($data[$i])) {
1473: &Apache::lonxml::warning(
1474: 'Bad curve data value of '.$data[$i].' Replacing with '.
1475: ' pi/e = 1.15572734979092');
1476: $data[$i] = 1.15572734979092;
1477: }
1478: }
1479: # complain if the number of data points is not the same as
1480: # in previous sets of data.
1481: if (($curves[-1]->{'data'}) && ($#data != $#{$curves[-1]->{'data'}->[0]})){
1482: &Apache::lonxml::warning
1483: ('Number of data points is not consistent with previous '.
1484: 'number of data points');
1485: }
1486: push @{$curves[-1]->{'data'}},\@data;
1487: } elsif ($target eq 'edit') {
1488: $result .= &Apache::edit::tag_start($target,$token,'Comma or space deliminated curve data');
1489: my $text = &Apache::lonxml::get_all_text("/data",$parser,$style);
1490: $result .= &Apache::edit::editline('',$text,'',60);
1491: } elsif ($target eq 'modified') {
1492: $result.=&Apache::edit::rebuild_tag($token);
1493: $result.=&Apache::edit::modifiedfield("/data",$parser);
1494: }
1495: return $result;
1496: }
1497:
1498: sub end_data {
1499: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1500: my $result = '';
1501: if ($target eq 'web' || $target eq 'tex') {
1502: } elsif ($target eq 'edit') {
1503: $result .= &Apache::edit::end_table();
1504: }
1505: return $result;
1506: }
1507:
1508: ##------------------------------------------------------------------- axis
1509: sub start_axis {
1510: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1511: my $result='';
1512: if ($target eq 'web' || $target eq 'tex') {
1513: &get_attributes(\%axis,\%axis_defaults,$parstack,$safeeval,
1514: $tagstack->[-1]);
1515: } elsif ($target eq 'edit') {
1516: $result .= &Apache::edit::tag_start($target,$token,'Plot Axes');
1517: $result .= &edit_attributes($target,$token,\%axis_defaults,
1518: \@axis_edit_order);
1519: } elsif ($target eq 'modified') {
1520: my $constructtag=&Apache::edit::get_new_args
1521: ($token,$parstack,$safeeval,keys(%axis_defaults));
1522:
1523: if ($constructtag) {
1524: #
1525: # Fix up the color attribute since jchooser does not
1526: # prepend an x to the color:
1527: #
1528: my $value = $token->[2]{'color'};
1529: if (defined $value && !($value =~ /^x/)) {
1530: $token->[2]{'color'} = 'x' . $value;
1531: }
1532:
1533: $result = &Apache::edit::rebuild_tag($token);
1534: }
1535: }
1536: return $result;
1537: }
1538:
1539: sub end_axis {
1540: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1541: my $result = '';
1542: if ($target eq 'web' || $target eq 'tex') {
1543: } elsif ($target eq 'edit') {
1544: $result.=&Apache::edit::tag_end($target,$token);
1545: } elsif ($target eq 'modified') {
1546: }
1547: return $result;
1548: }
1549:
1550: ###################################################################
1551: ## ##
1552: ## Utility Functions ##
1553: ## ##
1554: ###################################################################
1555:
1556: ##----------------------------------------------------------- set_defaults
1557: sub set_defaults {
1558: my ($var,$defaults) = @_;
1559: my $key;
1560: foreach $key (keys(%$defaults)) {
1561: $var->{$key} = $defaults->{$key}->{'default'};
1562: }
1563: }
1564:
1565: ##------------------------------------------------------------------- misc
1566: sub get_attributes{
1567: my ($values,$defaults,$parstack,$safeeval,$tag) = @_;
1568: foreach my $attr (keys(%{$defaults})) {
1569: if ($attr eq 'texwidth' || $attr eq 'texfont') {
1570: $values->{$attr} =
1571: &Apache::lonxml::get_param($attr,$parstack,$safeeval,undef,1);
1572: } else {
1573: $values->{$attr} =
1574: &Apache::lonxml::get_param($attr,$parstack,$safeeval);
1575: }
1576: if ($values->{$attr} eq '' | !defined($values->{$attr})) {
1577: $values->{$attr} = $defaults->{$attr}->{'default'};
1578: next;
1579: }
1580: my $test = $defaults->{$attr}->{'test'};
1581: if (! &$test($values->{$attr})) {
1582: &Apache::lonxml::warning
1583: ($tag.':'.$attr.': Bad value.'.'Replacing your value with : '
1584: .$defaults->{$attr}->{'default'} );
1585: $values->{$attr} = $defaults->{$attr}->{'default'};
1586: }
1587: }
1588: return ;
1589: }
1590:
1591: ##------------------------------------------------------- write_gnuplot_file
1592: sub write_gnuplot_file {
1593: my ($tmpdir,$filename,$target)= @_;
1594: my ($fontsize, $font_properties) = &get_font($target);
1595: my $gnuplot_input = '';
1596: my $curve;
1597: #
1598: # Check to be sure we do not have any empty curves
1599: my @curvescopy;
1600: foreach my $curve (@curves) {
1601: if (exists($curve->{'function'})) {
1602: if ($curve->{'function'} !~ /^\s*$/) {
1603: push(@curvescopy,$curve);
1604: }
1605: } elsif (exists($curve->{'data'})) {
1606: foreach my $data (@{$curve->{'data'}}) {
1607: if (scalar(@$data) > 0) {
1608: push(@curvescopy,$curve);
1609: last;
1610: }
1611: }
1612: }
1613: }
1614: @curves = @curvescopy;
1615: # Collect all the colors
1616: my @Colors;
1617: push @Colors, $Apache::lonplot::plot{'bgcolor'};
1618: push @Colors, $Apache::lonplot::plot{'fgcolor'};
1619: push @Colors, (defined($axis{'color'})?$axis{'color'}:$Apache::lonplot::plot{'fgcolor'});
1620: foreach $curve (@curves) {
1621: push @Colors, ($curve->{'color'} ne '' ?
1622: $curve->{'color'} :
1623: $Apache::lonplot::plot{'fgcolor'} );
1624: }
1625:
1626: # set term
1627: if ($target eq 'web') {
1628: $gnuplot_input .= 'set terminal png enhanced nocrop ';
1629: $gnuplot_input .= 'transparent ' if ($Apache::lonplot::plot{'transparent'} eq 'on');
1630: $gnuplot_input .= 'font "'.$Apache::lonnet::perlvar{'lonFontsDir'}.
1631: '/'.$font_properties->{'file'}.'.ttf" ';
1632: $gnuplot_input .= $fontsize;
1633: $gnuplot_input .= ' size '.$Apache::lonplot::plot{'width'}.','.$Apache::lonplot::plot{'height'}.' ';
1634: $gnuplot_input .= "@Colors\n";
1635: # set output
1636: $gnuplot_input .= "set output\n";
1637: } elsif ($target eq 'tex') {
1638: $gnuplot_input .= "set term postscript eps enhanced $Apache::lonplot::plot{'plotcolor'} dash ";
1639: if (!$font_properties->{'tex_no_file'}) {
1640: $gnuplot_input .=
1641: 'fontfile "'.$Apache::lonnet::perlvar{'lonFontsDir'}.
1642: '/'.$font_properties->{'file'}.'.pfb" ';
1643: }
1644: $gnuplot_input .= ' "'.$font_properties->{'printname'}.'" ';
1645: $gnuplot_input .= $fontsize;
1646: $gnuplot_input .= "\nset output \"".$tmpdir.
1647: &unescape($filename).".eps\"\n";
1648: $gnuplot_input .= "set encoding iso_8859_1\n"; # Get access to extended font.
1649:
1650: }
1651: # cartesian or polar plot?
1652: if (lc($Apache::lonplot::plot{'plottype'}) eq 'polar') {
1653: $gnuplot_input .= 'set polar'.$/;
1654: } else {
1655: # Assume Cartesian
1656: }
1657: # cartesian or polar grid?
1658: if (lc($Apache::lonplot::plot{'gridtype'}) eq 'polar') {
1659: $gnuplot_input .= 'set grid polar'.$/;
1660: } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'linear-log') {
1661: $gnuplot_input .= 'set logscale x'.$/;
1662: } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'log-linear') {
1663: $gnuplot_input .= 'set logscale y'.$/;
1664: } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'log-log') {
1665: $gnuplot_input .= 'set logscale x'.$/;
1666: $gnuplot_input .= 'set logscale y'.$/;
1667: } else {
1668: # Assume Cartesian
1669: }
1670: # solid or pattern for boxes?
1671: if (lc($Apache::lonplot::plot{'fillstyle'}) eq 'solid') {
1672: $gnuplot_input .= 'set style fill solid '.
1673: $Apache::lonplot::plot{'solid'}.$Apache::lonplot::plot{'box_border'}.$/;
1674: } elsif (lc($Apache::lonplot::plot{'fillstyle'}) eq 'pattern') {
1675: $gnuplot_input .= 'set style fill pattern '.$Apache::lonplot::plot{'pattern'}.$Apache::lonplot::plot{'box_border'}.$/;
1676: } elsif (lc($Apache::lonplot::plot{'fillstyle'}) eq 'empty') {
1677: }
1678: # margin
1679: if (lc($Apache::lonplot::plot{'lmargin'}) ne 'default') {
1680: $gnuplot_input .= 'set lmargin '.$Apache::lonplot::plot{'lmargin'}.$/;
1681: }
1682: if (lc($Apache::lonplot::plot{'rmargin'}) ne 'default') {
1683: $gnuplot_input .= 'set rmargin '.$Apache::lonplot::plot{'rmargin'}.$/;
1684: }
1685: if (lc($Apache::lonplot::plot{'tmargin'}) ne 'default') {
1686: $gnuplot_input .= 'set tmargin '.$Apache::lonplot::plot{'tmargin'}.$/;
1687: }
1688: if (lc($Apache::lonplot::plot{'bmargin'}) ne 'default') {
1689: $gnuplot_input .= 'set bmargin '.$Apache::lonplot::plot{'bmargin'}.$/;
1690: }
1691:
1692: # tic scales
1693: if ($version > 4) {
1694: $gnuplot_input .= 'set tics scale '.
1695: $Apache::lonplot::plot{'major_ticscale'}.', '.$Apache::lonplot::plot{'minor_ticscale'}.$/;
1696: } else {
1697: $gnuplot_input .= 'set ticscale '.
1698: $Apache::lonplot::plot{'major_ticscale'}.' '.$Apache::lonplot::plot{'minor_ticscale'}.$/;
1699: }
1700: #boxwidth
1701: if (lc($Apache::lonplot::plot{'boxwidth'}) ne '') {
1702: $gnuplot_input .= 'set boxwidth '.$Apache::lonplot::plot{'boxwidth'}.$/;
1703: }
1704: # gridlayer
1705: $gnuplot_input .= 'set grid noxtics noytics front '.$/
1706: if ($Apache::lonplot::plot{'gridlayer'} eq 'on');
1707:
1708: # grid
1709: $gnuplot_input .= 'set grid'.$/ if ($Apache::lonplot::plot{'grid'} eq 'on');
1710: # border
1711: $gnuplot_input .= ($Apache::lonplot::plot{'border'} eq 'on'?
1712: 'set border'.$/ :
1713: 'set noborder'.$/ );
1714: # sampling rate for non-data curves
1715: $gnuplot_input .= "set samples $Apache::lonplot::plot{'samples'}\n";
1716: # title, xlabel, ylabel
1717: # titles
1718: my $extra_space_x = ($xtics{'location'} eq 'axis') ? ' 0, -0.5 ' : '';
1719: my $extra_space_y = ($ytics{'location'} eq 'axis') ? ' -0.5, 0 ' : '';
1720:
1721: if ($target eq 'tex') {
1722: $gnuplot_input .= "set title \"$title\" font \"".$font_properties->{'printname'}.",".$fontsize."pt\"\n" if (defined($title)) ;
1723: $gnuplot_input .= "set xlabel \"$xlabel\" $extra_space_x font \"".$font_properties->{'printname'}.",".$fontsize."pt\"\n" if (defined($xlabel));
1724: $gnuplot_input .= "set ylabel \"$ylabel\" $extra_space_y font \"".$font_properties->{'printname'}.",".$fontsize."pt\"\n" if (defined($ylabel));
1725: } else {
1726: $gnuplot_input .= "set title \"$title\" \n" if (defined($title)) ;
1727: $gnuplot_input .= "set xlabel \"$xlabel\" $extra_space_x \n" if (defined($xlabel));
1728: $gnuplot_input .= "set ylabel \"$ylabel\" $extra_space_y \n" if (defined($ylabel));
1729: }
1730: # tics
1731: if (%xtics) {
1732: $gnuplot_input .= "set xtics $xtics{'location'} ";
1733: $gnuplot_input .= ( $xtics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1734: $gnuplot_input .= "$xtics{'start'}, ";
1735: $gnuplot_input .= "$xtics{'increment'}, ";
1736: $gnuplot_input .= "$xtics{'end'} ";
1737: if ($target eq 'tex') {
1738: $gnuplot_input .= 'font "Helvetica,22"'; # Needed in iso 8859-1 enc.
1739: }
1740: $gnuplot_input .= "\n";
1741: if ($xtics{'minorfreq'} != 0) {
1742: $gnuplot_input .= "set mxtics ".$xtics{'minorfreq'}."\n";
1743: }
1744: } else {
1745: if ($target eq 'tex') {
1746: $gnuplot_input .= 'set xtics font "Helvetica,22"'."\n"; # needed in iso 8859-1 enc
1747: }
1748: }
1749: if (%ytics) {
1750: $gnuplot_input .= "set ytics $ytics{'location'} ";
1751: $gnuplot_input .= ( $ytics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1752: $gnuplot_input .= "$ytics{'start'}, ";
1753: $gnuplot_input .= "$ytics{'increment'}, ";
1754: $gnuplot_input .= "$ytics{'end'} ";
1755: if ($target eq 'tex') {
1756: $gnuplot_input .= 'font "Helvetica,22"'; # Needed in iso-8859-1 encoding.
1757: }
1758: $gnuplot_input .= "\n";
1759: if ($ytics{'minorfreq'} != 0) {
1760: $gnuplot_input .= "set mytics ".$ytics{'minorfreq'}."\n";
1761: }
1762: } else {
1763: if ($target eq 'tex') {
1764: $gnuplot_input .= 'set ytics font "Helvetica,22"'."\n"; # Needed for iso 8859-1 enc.
1765: }
1766: }
1767: # axis
1768: if (%axis) {
1769: if ($axis{'xformat'} ne 'on') {
1770: $gnuplot_input .= "set format x ";
1771: if ($axis{'xformat'} eq 'off') {
1772: $gnuplot_input .= "\"\"\n";
1773: } else {
1774: $gnuplot_input .= "\"\%.".$axis{'xformat'}."\"\n";
1775: }
1776: }
1777: if ($axis{'yformat'} ne 'on') {
1778: $gnuplot_input .= "set format y ";
1779: if ($axis{'yformat'} eq 'off') {
1780: $gnuplot_input .= "\"\"\n";
1781: } else {
1782: $gnuplot_input .= "\"\%.".$axis{'yformat'}."\"\n";
1783: }
1784: }
1785: $gnuplot_input .= "set xrange \[$axis{'xmin'}:$axis{'xmax'}\]\n";
1786: $gnuplot_input .= "set yrange \[$axis{'ymin'}:$axis{'ymax'}\]\n";
1787: if ($axis{'xzero'} ne 'off') {
1788: $gnuplot_input .= "set xzeroaxis ";
1789: if ($axis{'xzero'} eq 'line' || $axis{'xzero'} eq 'thick-line') {
1790: $gnuplot_input .= "lt -1 ";
1791: if ($axis{'xzero'} eq 'thick-line') {
1792: $gnuplot_input .= "lw 3 ";
1793: }
1794: }
1795: $gnuplot_input .= "\n";
1796: }
1797: if ($axis{'yzero'} ne 'off') {
1798: $gnuplot_input .= "set yzeroaxis ";
1799: if ($axis{'yzero'} eq 'line' || $axis{'yzero'} eq 'thick-line') {
1800: $gnuplot_input .= "lt -1 ";
1801: if ($axis{'yzero'} eq 'thick-line') {
1802: $gnuplot_input .= "lw 3 ";
1803: }
1804: }
1805: $gnuplot_input .= "\n";
1806: }
1807: }
1808: # Key
1809: if (%key) {
1810: $gnuplot_input .= 'set key '.$key{'pos'}.' ';
1811: if ($key{'title'} ne '') {
1812: $gnuplot_input .= 'title "'.$key{'title'}.'" ';
1813: }
1814: $gnuplot_input .= ($key{'box'} eq 'on' ? 'box ' : 'nobox ').$/;
1815: } else {
1816: $gnuplot_input .= 'set nokey'.$/;
1817: }
1818: # labels
1819: my $label;
1820: foreach $label (@labels) {
1821: $gnuplot_input .= 'set label "'.$label->{'text'}.'" at '.
1822: $label->{'xpos'}.','.$label->{'ypos'};
1823: if ($label->{'rotate'} ne '') {
1824: $gnuplot_input .= ' rotate by '.$label->{'rotate'};
1825: }
1826: $gnuplot_input .= ' '.$label->{'justify'};
1827:
1828: if ($target eq 'tex') {
1829: $gnuplot_input .=' font "'.$font_properties->{'printname'}.','.$fontsize.'pt"' ;
1830: }
1831: $gnuplot_input .= $/;
1832: }
1833: if ($target eq 'tex') {
1834: $gnuplot_input .="set size 1,".$Apache::lonplot::plot{'height'}/$Apache::lonplot::plot{'width'}*1.38;
1835: $gnuplot_input .="\n";
1836: }
1837: # curves
1838: #
1839: # Each curve will have its very own linestyle.
1840: # (This should work just fine in web rendition I think).
1841: # The line_xxx variables will hold the elements of the line style.
1842: # type (solid/dashed), color, width
1843: #
1844: my $linestyle_index = 50;
1845: my $line_type = '';
1846: my $line_color = '';
1847: my $line_width = '';
1848:
1849: my $plot_command;
1850: my $plot_type;
1851:
1852: for (my $i = 0;$i<=$#curves;$i++) {
1853: $curve = $curves[$i];
1854: $plot_command.= ', ' if ($i > 0);
1855: if ($target eq 'tex') {
1856: $curve->{'linewidth'} *= 2;
1857: }
1858: if (exists($curve->{'function'})) {
1859: $plot_type =
1860: $curve->{'function'}.' title "'.
1861: $curve->{'name'}.'" with '.
1862: $curve->{'linestyle'};
1863: } elsif (exists($curve->{'data'})) {
1864: # Store data values in $datatext
1865: my $datatext = '';
1866: # get new filename
1867: my $datafilename = "$tmpdir/$filename.data.$i";
1868: my $fh=Apache::File->new(">$datafilename");
1869: # Compile data
1870: my @Data = @{$curve->{'data'}};
1871: my @Data0 = @{$Data[0]};
1872: for (my $i =0; $i<=$#Data0; $i++) {
1873: my $dataset;
1874: foreach $dataset (@Data) {
1875: $datatext .= $dataset->[$i] . ' ';
1876: }
1877: $datatext .= $/;
1878: }
1879: # write file
1880: print $fh $datatext;
1881: close($fh);
1882: # generate gnuplot text
1883: $plot_type = '"'.$datafilename.'" title "'.
1884: $curve->{'name'}.'" with '.
1885: $curve->{'linestyle'};
1886: }
1887: if (($curve->{'linestyle'} eq 'points') ||
1888: ($curve->{'linestyle'} eq 'linespoints') ||
1889: ($curve->{'linestyle'} eq 'errorbars') ||
1890: ($curve->{'linestyle'} eq 'xerrorbars') ||
1891: ($curve->{'linestyle'} eq 'yerrorbars') ||
1892: ($curve->{'linestyle'} eq 'xyerrorbars')) {
1893: $plot_command.=' pointtype '.$curve->{'pointtype'};
1894: $plot_command.=' pointsize '.$curve->{'pointsize'};
1895: } elsif ($curve->{'linestyle'} eq 'filledcurves') {
1896: $plot_command.= ' '.$curve->{'limit'};
1897: } elsif ($curve->{'linetype'} ne '' &&
1898: $curve->{'linestyle'} eq 'lines') {
1899: $plot_command.= ' linetype ';
1900: $plot_command.= $linetypes{$curve->{'linetype'}};
1901: $plot_command.= ' linecolor rgb "';
1902: # convert color from xaaaaaa to #aaaaaa
1903: $curve->{'color'} =~ s/^x/#/;
1904: $plot_command.= $curve->{'color'}.'"';
1905: }
1906: $plot_command.= ' linewidth '.$curve->{'linewidth'};
1907: $gnuplot_input .= 'plot ' . $plot_type . ' ' . $plot_command . "\n";
1908: }
1909: # Write the output to a file.
1910: open (my $fh,">$tmpdir$filename.data");
1911: binmode($fh, ":utf8");
1912: print $fh $gnuplot_input;
1913: close($fh);
1914: # That's all folks.
1915: return ;
1916: }
1917:
1918: #---------------------------------------------- check_inputs
1919: sub check_inputs {
1920: ## Note: no inputs, no outputs - this acts only on global variables.
1921: ## Make sure we have all the input we need:
1922: if (! %Apache::lonplot::plot) { &set_defaults(\%Apache::lonplot::plot,\%gnuplot_defaults); }
1923: if (! %key ) {} # No key for this plot, thats okay
1924: # if (! %axis) { &set_defaults(\%axis,\%axis_defaults); }
1925: if (! defined($title )) {} # No title for this plot, thats okay
1926: if (! defined($xlabel)) {} # No xlabel for this plot, thats okay
1927: if (! defined($ylabel)) {} # No ylabel for this plot, thats okay
1928: if ($#labels < 0) { } # No labels for this plot, thats okay
1929: if ($#curves < 0) {
1930: &Apache::lonxml::warning("No curves specified for plot!!!!");
1931: return '';
1932: }
1933: my $curve;
1934: foreach $curve (@curves) {
1935: if (!defined($curve->{'function'})&&!defined($curve->{'data'})){
1936: &Apache::lonxml::warning("One of the curves specified did not contain any curve data or curve function declarations\n");
1937: return '';
1938: }
1939: }
1940: }
1941:
1942: #------------------------------------------------ make_edit
1943: sub edit_attributes {
1944: my ($target,$token,$defaults,$keys) = @_;
1945: my ($result,@keys);
1946: if ($keys && ref($keys) eq 'ARRAY') {
1947: @keys = @$keys;
1948: } else {
1949: @keys = sort(keys(%$defaults));
1950: }
1951: foreach my $attr (@keys) {
1952: # append a ' ' to the description if it doesn't have one already.
1953: my $description = $defaults->{$attr}->{'description'};
1954: $description .= ' ' if ($description !~ / $/);
1955: if ($defaults->{$attr}->{'edit_type'} eq 'entry') {
1956: $result .= &Apache::edit::text_arg
1957: ($description,$attr,$token,
1958: $defaults->{$attr}->{'size'},
1959: $defaults->{$attr}->{'class'});
1960: } elsif ($defaults->{$attr}->{'edit_type'} eq 'choice') {
1961: $result .= &Apache::edit::select_or_text_arg
1962: ($description,$attr,$defaults->{$attr}->{'choices'},$token);
1963: } elsif ($defaults->{$attr}->{'edit_type'} eq 'onoff') {
1964: $result .= &Apache::edit::select_or_text_arg
1965: ($description,$attr,['on','off'],$token);
1966: }
1967: $result .= '<br />';
1968: }
1969: return $result;
1970: }
1971:
1972:
1973: ###################################################################
1974: ## ##
1975: ## Insertion functions for editing plots ##
1976: ## ##
1977: ###################################################################
1978:
1979: sub insert_gnuplot {
1980: my $result = '';
1981: # plot attributes
1982: $result .= "\n<gnuplot ";
1983: foreach my $attr (keys(%gnuplot_defaults)) {
1984: $result .= "\n $attr=\"$gnuplot_defaults{$attr}->{'default'}\"";
1985: }
1986: $result .= ">";
1987: # Add the components (most are commented out for simplicity)
1988: # $result .= &insert_key();
1989: # $result .= &insert_axis();
1990: # $result .= &insert_title();
1991: # $result .= &insert_xlabel();
1992: # $result .= &insert_ylabel();
1993: $result .= &insert_curve();
1994: # close up the <gnuplot>
1995: $result .= "\n</gnuplot>";
1996: return $result;
1997: }
1998:
1999: sub insert_tics {
2000: my $result;
2001: $result .= &insert_xtics() . &insert_ytics;
2002: return $result;
2003: }
2004:
2005: sub insert_xtics {
2006: my $result;
2007: $result .= "\n <xtics ";
2008: foreach my $attr (keys(%tic_defaults)) {
2009: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
2010: }
2011: $result .= "/>";
2012: return $result;
2013: }
2014:
2015: sub insert_ytics {
2016: my $result;
2017: $result .= "\n <ytics ";
2018: foreach my $attr (keys(%tic_defaults)) {
2019: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
2020: }
2021: $result .= "/>";
2022: return $result;
2023: }
2024:
2025: sub insert_key {
2026: my $result;
2027: $result .= "\n <key ";
2028: foreach my $attr (keys(%key_defaults)) {
2029: $result .= "\n $attr=\"$key_defaults{$attr}->{'default'}\"";
2030: }
2031: $result .= " />";
2032: return $result;
2033: }
2034:
2035: sub insert_axis{
2036: my $result;
2037: $result .= "\n <axis ";
2038: foreach my $attr (keys(%axis_defaults)) {
2039: $result .= "\n $attr=\"$axis_defaults{$attr}->{'default'}\"";
2040: }
2041: $result .= " />";
2042: return $result;
2043: }
2044:
2045: sub insert_title { return "\n <title></title>"; }
2046: sub insert_xlabel { return "\n <xlabel></xlabel>"; }
2047: sub insert_ylabel { return "\n <ylabel></ylabel>"; }
2048:
2049: sub insert_label {
2050: my $result;
2051: $result .= "\n <label ";
2052: foreach my $attr (keys(%label_defaults)) {
2053: $result .= "\n $attr=\"".
2054: $label_defaults{$attr}->{'default'}."\"";
2055: }
2056: $result .= "></label>";
2057: return $result;
2058: }
2059:
2060: sub insert_curve {
2061: my $result;
2062: $result .= "\n <curve ";
2063: foreach my $attr (keys(%curve_defaults)) {
2064: $result .= "\n $attr=\"".
2065: $curve_defaults{$attr}->{'default'}."\"";
2066: }
2067: $result .= " >";
2068: $result .= &insert_data().&insert_data()."\n </curve>";
2069: }
2070:
2071: sub insert_function {
2072: my $result;
2073: $result .= "\n <function></function>";
2074: return $result;
2075: }
2076:
2077: sub insert_data {
2078: my $result;
2079: $result .= "\n <data></data>";
2080: return $result;
2081: }
2082:
2083: ##----------------------------------------------------------------------
2084: 1;
2085: __END__
2086:
2087:
2088: =head1 NAME
2089:
2090: Apache::lonplot.pm
2091:
2092: =head1 SYNOPSIS
2093:
2094: XML-based plotter of graphs
2095:
2096: This is part of the LearningOnline Network with CAPA project
2097: described at http://www.lon-capa.org.
2098:
2099:
2100: =head1 SUBROUTINES (parsing and edit rendering)
2101:
2102: =over
2103:
2104: =item start_gnuplot()
2105:
2106: =item end_gnuplot()
2107:
2108: =item start_xtics()
2109:
2110: =item end_xtics()
2111:
2112: =item start_ytics()
2113:
2114: =item end_ytics()
2115:
2116: =item get_font()
2117:
2118: =item start_key()
2119:
2120: =item end_key()
2121:
2122: =item parse_label()
2123:
2124: =item replace_entities()
2125:
2126: =item start_title()
2127:
2128: =item end_title()
2129:
2130: =item start_xlabel()
2131:
2132: =item end_xlabel()
2133:
2134: =item start_ylabel()
2135:
2136: =item end_label()
2137:
2138: =item start_curve()
2139:
2140: =item end_curve()
2141:
2142: =item start_function()
2143:
2144: =item end_function()
2145:
2146: =item start_data()
2147:
2148: =item end_data()
2149:
2150: =item start_axis()
2151:
2152: =item end_axis
2153:
2154: =back
2155:
2156: =head1 SUBROUTINES (Utility)
2157:
2158: =over
2159:
2160: =item set_defaults()
2161:
2162: =item get_attributes()
2163:
2164: =item write_gnuplot_file()
2165:
2166: =item check_inputs()
2167:
2168: =item edit_attributes()
2169:
2170: =back
2171:
2172: =head1 SUBROUTINES (Insertion functions for editing plots)
2173:
2174: =over
2175:
2176: =item insert_gnuplot()
2177:
2178: =item insert_tics()
2179:
2180: =item insert_xtics()
2181:
2182: =item insert_key()
2183:
2184: =item insert_axis()
2185:
2186: =item insert_title()
2187:
2188: =item insert_xlabel()
2189:
2190: =item insert_ylabel()
2191:
2192: =item insert_label()
2193:
2194: =item insert_curve()
2195:
2196: =item insert_function()
2197:
2198: =item insert_data()
2199:
2200: =back
2201:
2202: =cut
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