1: # The LearningOnline Network with CAPA
2: # Dynamic plot
3: #
4: # $Id: lonplot.pm,v 1.163 2012/07/24 10:50:54 foxr Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28:
29:
30:
31:
32: package Apache::lonplot;
33:
34: use strict;
35: use warnings FATAL=>'all';
36: no warnings 'uninitialized';
37: use Apache::File;
38: use Apache::response;
39: use Apache::lonxml;
40: use Apache::edit;
41: use Apache::lonnet;
42: use LONCAPA;
43:
44:
45: use vars qw/$weboutputformat $version/;
46:
47:
48:
49: BEGIN {
50: &Apache::lonxml::register('Apache::lonplot',('gnuplot'));
51: #
52: # Determine the version of GNUPLOT
53: $weboutputformat = 'gif';
54: my $versionstring = `gnuplot --version 2>/dev/null`;
55: ($version) = ($versionstring =~ /^gnuplot ([\d.]+)/);
56: if ($version >= 4) {
57: $weboutputformat = 'png';
58: }
59:
60: }
61:
62:
63: =pod
64:
65: ##
66: ## Description of data structures:
67: ##
68: ## %plot %key %axis
69: ## --------------------------
70: ## height title color
71: ## width box xmin
72: ## bgcolor pos xmax
73: ## fgcolor ymin
74: ## transparent ymax
75: ## grid
76: ## border
77: ## font
78: ## align
79: ##
80: ## @labels: $labels[$i] = \%label
81: ## %label: text, xpos, ypos, justify
82: ##
83: ## @curves: $curves[$i] = \%curve
84: ## %curve: name, linestyle, ( function | data )
85: ##
86: ## $curves[$i]->{'data'} = [ [x1,x2,x3,x4],
87: ## [y1,y2,y3,y4] ]
88: ##
89:
90: ###################################################################
91: ## ##
92: ## Tests used in checking the validitity of input ##
93: ## ##
94: ###################################################################
95:
96: =cut
97:
98: my $max_str_len = 50; # if a label, title, xlabel, or ylabel text
99: # is longer than this, it will be truncated.
100:
101: my %linetypes = # For png use these linetypes.
102: (
103: solid => 1,
104: dashed => 0
105: );
106: my %ps_linetypes = # For ps the line types are different!
107: (
108: solid => 0,
109: dashed => 7
110: );
111:
112: my %linestyles =
113: (
114: lines => 2, # Maybe this will be used in the future
115: linespoints => 2, # to check on whether or not they have
116: dots => 2, # supplied enough <data></data> fields
117: points => 2, # to use the given line style. But for
118: steps => 2, # now there are more important things
119: fsteps => 2, # for me to deal with.
120: histeps => 2,
121: errorbars => 3,
122: xerrorbars => [3,4],
123: yerrorbars => [3,4],
124: xyerrorbars => [4,6],
125: boxes => 3,
126: filledcurves => 2,
127: vector => 4
128: );
129:
130: my $int_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^\d+$/};
131: my $real_test =
132: sub {$_[0]=~s/\s+//g;$_[0]=~/^[+-]?\d*\.?\d*([eE][+-]\d+)?$/};
133: my $pos_real_test =
134: sub {$_[0]=~s/\s+//g;$_[0]=~/^[+]?\d*\.?\d*([eE][+-]\d+)?$/};
135: my $color_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^x[\da-fA-F]{6}$/};
136: my $onoff_test = sub {$_[0]=~/^(on|off)$/};
137: my $key_pos_test = sub {$_[0]=~/^(top|bottom|right|left|outside|below| )+$/};
138: my $sml_test = sub {$_[0]=~/^(\d+|small|medium|large)$/};
139: my $linestyle_test = sub {exists($linestyles{$_[0]})};
140: my $words_test = sub {$_[0]=~s/\s+/ /g;$_[0]=~/^([\w~!\@\#\$\%^&\*\(\)-=_\+\[\]\{\}:\;\'<>,\.\/\?\\]+ ?)+$/};
141:
142: my $arrowhead_test = sub{$_[0]=~/^(nohead|head|heads| )+$/};
143: my $arrowstyle_test= sub{$_[0]=~/^(filled|empty|nofilled)+$/};
144: my $degree_test = sub{&$pos_real_test($_[0]) && ($_[0] <= 360.0)};
145:
146: ###################################################################
147: ## ##
148: ## Attribute metadata ##
149: ## ##
150: ###################################################################
151: my @gnuplot_edit_order =
152: qw/alttag bgcolor fgcolor height width texwidth fontface font texfont
153: transparent grid samples
154: border align plotcolor plottype gridtype lmargin rmargin
155: tmargin bmargin major_ticscale minor_ticscale boxwidth gridlayer fillstyle
156: pattern solid/;
157:
158: my $margin_choices = ['default',0..20];
159:
160: my %gnuplot_defaults =
161: (
162: alttag => {
163: default => 'dynamically generated plot',
164: test => $words_test,
165: description => 'Brief description of the plot',
166: edit_type => 'entry',
167: size => '40'
168: },
169: height => {
170: default => 300,
171: test => $int_test,
172: description => 'Height of image (pixels)',
173: edit_type => 'entry',
174: size => '10'
175: },
176: width => {
177: default => 400,
178: test => $int_test,
179: description => 'Width of image (pixels)',
180: edit_type => 'entry',
181: size => '10'
182: },
183: bgcolor => {
184: default => 'xffffff',
185: test => $color_test,
186: description => 'Background color of image (xffffff)',
187: edit_type => 'entry',
188: size => '10',
189: class => 'colorchooser'
190: },
191: fgcolor => {
192: default => 'x000000',
193: test => $color_test,
194: description => 'Foreground color of image (x000000)',
195: edit_type => 'entry',
196: size => '10',
197: class => 'colorchooser'
198: },
199: transparent => {
200: default => 'off',
201: test => $onoff_test,
202: description => 'Transparent image',
203: edit_type => 'onoff'
204: },
205: grid => {
206: default => 'on',
207: test => $onoff_test,
208: description => 'Display grid',
209: edit_type => 'onoff'
210: },
211: gridlayer => {
212: default => 'off',
213: test => $onoff_test,
214: description => 'Display grid front layer over filled boxes or filled curves',
215: edit_type => 'onoff'
216: },
217: box_border => {
218: default => 'noborder',
219: test => sub {$_[0]=~/^(noborder|border)$/},
220: description => 'Draw border for boxes',
221: edit_type => 'choice',
222: choices => ['border','noborder']
223: },
224: border => {
225: default => 'on',
226: test => $onoff_test,
227: description => 'Draw border around plot',
228: edit_type => 'onoff'
229: },
230: font => {
231: default => '9',
232: test => $sml_test,
233: description => 'Font size to use in web output (pts)',
234: edit_type => 'choice',
235: choices => [['5','5 (small)'],'6','7','8',['9','9 (medium)'],'10',['11','11 (large)'],'12','15']
236: },
237: fontface => {
238: default => 'sans-serif',
239: test => sub {$_[0]=~/^(sans-serif|serif|classic)$/},
240: description => 'Type of font to use',
241: edit_type => 'choice',
242: choices => ['sans-serif','serif', 'classic']
243: },
244: samples => {
245: default => '100',
246: test => $int_test,
247: description => 'Number of samples for non-data plots',
248: edit_type => 'choice',
249: choices => ['100','200','500','1000','2000','5000']
250: },
251: align => {
252: default => 'middle',
253: test => sub {$_[0]=~/^(left|right|middle|center)$/},
254: description => 'Alignment for image in HTML',
255: edit_type => 'choice',
256: choices => ['left','right','middle']
257: },
258: texwidth => {
259: default => '93',
260: test => $int_test,
261: description => 'Width of plot when printed (mm)',
262: edit_type => 'entry',
263: size => '5'
264: },
265: texfont => {
266: default => '22',
267: test => $int_test,
268: description => 'Font size to use in TeX output (pts):',
269: edit_type => 'choice',
270: choices => [qw/8 10 12 14 16 18 20 22 24 26 28 30 32 34 36/],
271: },
272: plotcolor => {
273: default => 'monochrome',
274: test => sub {$_[0]=~/^(monochrome|color|colour)$/},
275: description => 'Color setting for printing:',
276: edit_type => 'choice',
277: choices => [qw/monochrome color colour/],
278: },
279: pattern => {
280: default => '',
281: test => $int_test,
282: description => 'Pattern value for boxes:',
283: edit_type => 'choice',
284: choices => [0,1,2,3,4,5,6]
285: },
286: solid => {
287: default => 0,
288: test => $real_test,
289: description => 'The density of fill style for boxes',
290: edit_type => 'entry',
291: size => '5'
292: },
293: fillstyle => {
294: default => 'empty',
295: test => sub {$_[0]=~/^(empty|solid|pattern)$/},
296: description => 'Filled style for boxes:',
297: edit_type => 'choice',
298: choices => ['empty','solid','pattern']
299: },
300: plottype => {
301: default => 'Cartesian',
302: test => sub {$_[0]=~/^(Polar|Cartesian)$/},
303: description => 'Plot type:',
304: edit_type => 'choice',
305: choices => ['Cartesian','Polar']
306: },
307: gridtype => {
308: default => 'Cartesian',
309: test => sub {$_[0]=~/^(Polar|Cartesian|Linear-Log|Log-Linear|Log-Log)$/},
310: description => 'Grid type:',
311: edit_type => 'choice',
312: choices => ['Cartesian','Polar','Linear-Log','Log-Linear','Log-Log']
313: },
314: lmargin => {
315: default => 'default',
316: test => sub {$_[0]=~/^(default|\d+)$/},
317: description => 'Left margin width (pts):',
318: edit_type => 'choice',
319: choices => $margin_choices,
320: },
321: rmargin => {
322: default => 'default',
323: test => sub {$_[0]=~/^(default|\d+)$/},
324: description => 'Right margin width (pts):',
325: edit_type => 'choice',
326: choices => $margin_choices,
327: },
328: tmargin => {
329: default => 'default',
330: test => sub {$_[0]=~/^(default|\d+)$/},
331: description => 'Top margin width (pts):',
332: edit_type => 'choice',
333: choices => $margin_choices,
334: },
335: bmargin => {
336: default => 'default',
337: test => sub {$_[0]=~/^(default|\d+)$/},
338: description => 'Bottom margin width (pts):',
339: edit_type => 'choice',
340: choices => $margin_choices,
341: },
342: boxwidth => {
343: default => '',
344: test => $real_test,
345: description => 'Width of boxes, default is auto',
346: edit_type => 'entry',
347: size => '5'
348: },
349: major_ticscale => {
350: default => '1',
351: test => $real_test,
352: description => 'Size of major tic marks (plot coordinates)',
353: edit_type => 'entry',
354: size => '5'
355: },
356: minor_ticscale => {
357: default => '0.5',
358: test => $real_test,
359: description => 'Size of minor tic mark (plot coordinates)',
360: edit_type => 'entry',
361: size => '5'
362: },
363: );
364:
365: my %key_defaults =
366: (
367: title => {
368: default => '',
369: test => $words_test,
370: description => 'Title of key',
371: edit_type => 'entry',
372: size => '40'
373: },
374: box => {
375: default => 'off',
376: test => $onoff_test,
377: description => 'Draw a box around the key?',
378: edit_type => 'onoff'
379: },
380: pos => {
381: default => 'top right',
382: test => $key_pos_test,
383: description => 'Position of the key on the plot',
384: edit_type => 'choice',
385: choices => ['top left','top right','bottom left','bottom right',
386: 'outside','below']
387: }
388: );
389:
390: my %label_defaults =
391: (
392: xpos => {
393: default => 0,
394: test => $real_test,
395: description => 'X position of label (graph coordinates)',
396: edit_type => 'entry',
397: size => '10'
398: },
399: ypos => {
400: default => 0,
401: test => $real_test,
402: description => 'Y position of label (graph coordinates)',
403: edit_type => 'entry',
404: size => '10'
405: },
406: justify => {
407: default => 'left',
408: test => sub {$_[0]=~/^(left|right|center)$/},
409: description => 'justification of the label text on the plot',
410: edit_type => 'choice',
411: choices => ['left','right','center']
412: },
413: rotate => {
414: default => 0,
415: test => $real_test,
416: description => 'Rotation of label (degrees)',
417: edit_type => 'entry',
418: size => '10',
419: }
420: );
421:
422: my @tic_edit_order = ('location','mirror','start','increment','end',
423: 'minorfreq');
424: my %tic_defaults =
425: (
426: location => {
427: default => 'border',
428: test => sub {$_[0]=~/^(border|axis)$/},
429: description => 'Location of major tic marks',
430: edit_type => 'choice',
431: choices => ['border','axis']
432: },
433: mirror => {
434: default => 'on',
435: test => $onoff_test,
436: description => 'Mirror tics on opposite axis?',
437: edit_type => 'onoff'
438: },
439: start => {
440: default => '-10.0',
441: test => $real_test,
442: description => 'Start major tics at',
443: edit_type => 'entry',
444: size => '10'
445: },
446: increment => {
447: default => '1.0',
448: test => $real_test,
449: description => 'Place a major tic every',
450: edit_type => 'entry',
451: size => '10'
452: },
453: end => {
454: default => ' 10.0',
455: test => $real_test,
456: description => 'Stop major tics at ',
457: edit_type => 'entry',
458: size => '10'
459: },
460: minorfreq => {
461: default => '0',
462: test => $int_test,
463: description => 'Number of minor tics per major tic mark',
464: edit_type => 'entry',
465: size => '10'
466: },
467: );
468:
469: my @axis_edit_order = ('color','xmin','xmax','ymin','ymax','xformat', 'yformat', 'xzero', 'yzero');
470: my %axis_defaults =
471: (
472: color => {
473: default => 'x000000',
474: test => $color_test,
475: description => 'Color of grid lines (x000000)',
476: edit_type => 'entry',
477: size => '10',
478: class => 'colorchooser'
479: },
480: xmin => {
481: default => '-10.0',
482: test => $real_test,
483: description => 'Minimum x-value shown in plot',
484: edit_type => 'entry',
485: size => '10'
486: },
487: xmax => {
488: default => ' 10.0',
489: test => $real_test,
490: description => 'Maximum x-value shown in plot',
491: edit_type => 'entry',
492: size => '10'
493: },
494: ymin => {
495: default => '-10.0',
496: test => $real_test,
497: description => 'Minimum y-value shown in plot',
498: edit_type => 'entry',
499: size => '10'
500: },
501: ymax => {
502: default => ' 10.0',
503: test => $real_test,
504: description => 'Maximum y-value shown in plot',
505: edit_type => 'entry',
506: size => '10'
507: },
508: xformat => {
509: default => 'on',
510: test => sub {$_[0]=~/^(on|off|\d+(f|F|e|E))$/},
511: description => 'X-axis number formatting',
512: edit_type => 'choice',
513: choices => ['on', 'off', '2e', '2f'],
514: },
515: yformat => {
516: default => 'on',
517: test => sub {$_[0]=~/^(on|off|\d+(f|F|e|E))$/},
518: description => 'Y-axis number formatting',
519: edit_type => 'choice',
520: choices => ['on', 'off', '2e', '2f'],
521: },
522:
523: xzero => {
524: default => 'off',
525: test => sub {$_[0]=~/^(off|line|thick-line|dotted)$/},
526: description => 'Show x-zero (y=0) axis',
527: edit_type => 'choice',
528: choices => ['off', 'line', 'thick-line', 'dotted'],
529: },
530:
531: yzero => {
532: default => 'off',
533: test => sub {$_[0]=~/^(off|line|thick-line|dotted)$/},
534: description => 'Show y-zero (x=0) axis',
535: edit_type => 'choice',
536: choices => ['off', 'line', 'thick-line', 'dotted'],
537: },
538: );
539:
540:
541: my @curve_edit_order = ('color','name','linestyle','linewidth','linetype',
542: 'pointtype','pointsize','limit', 'arrowhead', 'arrowstyle',
543: 'arrowlength', 'arrowangle', 'arrowbackangle'
544: );
545:
546: my %curve_defaults =
547: (
548: color => {
549: default => 'x000000',
550: test => $color_test,
551: description => 'Color of curve (x000000)',
552: edit_type => 'entry',
553: size => '10',
554: class => 'colorchooser'
555: },
556: name => {
557: default => '',
558: test => $words_test,
559: description => 'Name of curve to appear in key',
560: edit_type => 'entry',
561: size => '20'
562: },
563: linestyle => {
564: default => 'lines',
565: test => $linestyle_test,
566: description => 'Plot with:',
567: edit_type => 'choice',
568: choices => [keys(%linestyles)]
569: },
570: linewidth => {
571: default => 1,
572: test => $int_test,
573: description => 'Line width (may not apply to all plot styles)',
574: edit_type => 'choice',
575: choices => [1,2,3,4,5,6,7,8,9,10]
576: },
577: linetype => {
578: default => 'solid',
579: test => sub {$_[0]=~/^(solid|dashed)$/},
580: description => 'Line type (may not apply to all plot styles)',
581: edit_type => 'choice',
582: choices => ['solid', 'dashed']
583: },
584: pointsize => {
585: default => 1,
586: test => $pos_real_test,
587: description => 'Point size (may not apply to all plot styles)',
588: edit_type => 'entry',
589: size => '5'
590: },
591: pointtype => {
592: default => 1,
593: test => $int_test,
594: description => 'Point type (may not apply to all plot styles)',
595: edit_type => 'choice',
596: choices => [0,1,2,3,4,5,6]
597: },
598: limit => {
599: default => 'closed',
600: test => sub {$_[0]=~/^(above|below|closed|x1|x2|y1|y2)$/},
601: description => 'Point to fill -- for filledcurves',
602: edit_type => 'choice',
603: choices => ['above', 'below', 'closed','x1','x2','y1','y2']
604: },
605: arrowhead => {
606: default => 'head',
607: test => $arrowhead_test,
608: description => 'Vector arrow head type',
609: edit_type => 'choice',
610: choices => ['nohead', 'head', 'heads']
611: },
612: arrowstyle => {
613: default => 'filled',
614: test => $arrowstyle_test,
615: description => 'Vector arrow head style',
616: edit_type => 'choice',
617: choices => ['filled', 'empty', 'nofilled']
618: },
619: arrowlength => {
620: default => 0.02,
621: test => $pos_real_test,
622: description => "Length of vector arrow (only applies to vector plots)",
623: edit_type => 'entry',
624: size => '5'
625: },
626: arrowangle => {
627: default => 10.0,
628: test => $degree_test,
629: description => 'Angle of arrow branches to arrow body (only applies to vector plots)',
630: edit_type => 'entry',
631: size => '5'
632: },
633:
634: arrowbackangle => {
635: default => 90.0,
636: test => $degree_test,
637: descripton => 'Angle of arrow back lines to branches.',
638: edit_type => 'entry',
639: size => '5'
640: }
641:
642: );
643:
644: ###################################################################
645: ## ##
646: ## parsing and edit rendering ##
647: ## ##
648: ###################################################################
649:
650: undef %Apache::lonplot::plot;
651: my (%key,%axis,$title,$xlabel,$ylabel,@labels,@curves,%xtics,%ytics);
652:
653: my $current_tics; # Reference to the current tick hash
654:
655: sub start_gnuplot {
656: undef(%Apache::lonplot::plot); undef(%key); undef(%axis);
657: undef($title); undef($xlabel); undef($ylabel);
658: undef(@labels); undef(@curves);
659: undef(%xtics); undef(%ytics);
660: #
661: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
662: my $result='';
663: &Apache::lonxml::register('Apache::lonplot',
664: ('title','xlabel','ylabel','key','axis','label','curve',
665: 'xtics','ytics'));
666: push (@Apache::lonxml::namespace,'lonplot');
667: if ($target eq 'web' || $target eq 'tex') {
668: &get_attributes(\%Apache::lonplot::plot,\%gnuplot_defaults,$parstack,$safeeval,
669: $tagstack->[-1]);
670: } elsif ($target eq 'edit') {
671: $result .= &Apache::edit::tag_start($target,$token,'GnuPlot');
672: $result .= &edit_attributes($target,$token,\%gnuplot_defaults,
673: \@gnuplot_edit_order)
674: .&Apache::edit::end_row()
675: .&Apache::edit::start_spanning_row();
676: } elsif ($target eq 'modified') {
677: my $constructtag=&Apache::edit::get_new_args
678: ($token,$parstack,$safeeval,keys(%gnuplot_defaults));
679:
680: if ($constructtag) {
681: #
682: # The color chooser does not prepent x to the color values
683: # Do that here:
684: #
685: foreach my $attribute ('bgcolor', 'fgcolor') {
686: my $value = $token->[2]{$attribute};
687: if (defined $value && !($value =~ /^x/)) {
688: $token->[2]{$attribute} = 'x' . $value;
689: }
690: }
691: $result = &Apache::edit::rebuild_tag($token);
692: }
693: }
694: return $result;
695: }
696:
697: sub end_gnuplot {
698: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
699: pop @Apache::lonxml::namespace;
700: &Apache::lonxml::deregister('Apache::lonplot',
701: ('title','xlabel','ylabel','key','axis','label','curve'));
702: my $result = '';
703: my $randnumber;
704: my $tmpdir =LONCAPA::tempdir(); # Where temporary files live:
705:
706: # need to call rand everytime start_script would evaluate, as the
707: # safe space rand number generator and the global rand generator
708: # are not separate
709: if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
710: $target eq 'answer') {
711: $randnumber=int(rand(1000));
712: }
713: if ($target eq 'web' || $target eq 'tex') {
714: &check_inputs(); # Make sure we have all the data we need
715: ##
716: ## Determine filename
717: my $filename = $env{'user.name'}.'_'.$env{'user.domain'}.
718: '_'.time.'_'.$$.$randnumber.'_plot';
719: ## Write the plot description to the file
720: &write_gnuplot_file($tmpdir,$filename,$target);
721: $filename = &escape($filename);
722: ## return image tag for the plot
723: if ($target eq 'web') {
724: $result .= <<"ENDIMAGE";
725: <img src = "/cgi-bin/plot.$weboutputformat?file=$filename.data"
726: width = "$Apache::lonplot::plot{'width'}"
727: height = "$Apache::lonplot::plot{'height'}"
728: align = "$Apache::lonplot::plot{'align'}"
729: alt = "$Apache::lonplot::plot{'alttag'}" />
730: ENDIMAGE
731: } elsif ($target eq 'tex') {
732: &Apache::lonxml::debug(" gnuplot wid = $Apache::lonplot::plot{'width'}");
733: &Apache::lonxml::debug(" gnuplot ht = $Apache::lonplot::plot{'height'}");
734: #might be inside the safe space, register the URL for later
735: &Apache::lonxml::register_ssi("/cgi-bin/plot.gif?file=$filename.data&output=eps");
736: $result = "%DYNAMICIMAGE:$Apache::lonplot::plot{'width'}:$Apache::lonplot::plot{'height'}:$Apache::lonplot::plot{'texwidth'}\n";
737: $result .= '\graphicspath{{'.$tmpdir.'}}'."\n";
738: $result .= '\includegraphics[width='.$Apache::lonplot::plot{'texwidth'}.' mm]{'.&unescape($filename).'.eps}';
739: }
740: } elsif ($target eq 'edit') {
741: $result.=&Apache::edit::tag_end($target,$token);
742: }
743: return $result;
744: }
745:
746:
747: ##--------------------------------------------------------------- xtics
748: sub start_xtics {
749: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
750: my $result='';
751: if ($target eq 'web' || $target eq 'tex') {
752: &get_attributes(\%xtics,\%tic_defaults,$parstack,$safeeval,
753: $tagstack->[-1]);
754: $current_tics = \%xtics;
755: &Apache::lonxml::register('Apache::lonplot', 'tic');
756: } elsif ($target eq 'edit') {
757: $result .= &Apache::edit::tag_start($target,$token,'xtics');
758: $result .= &edit_attributes($target,$token,\%tic_defaults,
759: \@tic_edit_order);
760: } elsif ($target eq 'modified') {
761: my $constructtag=&Apache::edit::get_new_args
762: ($token,$parstack,$safeeval,keys(%tic_defaults));
763: if ($constructtag) {
764: $result = &Apache::edit::rebuild_tag($token);
765: }
766: }
767: return $result;
768: }
769:
770: sub end_xtics {
771: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
772: my $result = '';
773: if ($target eq 'web' || $target eq 'tex') {
774: &Apache::lonxml::deregister('Apache::lonplot', 'tic');
775: } elsif ($target eq 'edit') {
776: $result.=&Apache::edit::tag_end($target,$token);
777: }
778: return $result;
779: }
780:
781: ##--------------------------------------------------------------- ytics
782: sub start_ytics {
783: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
784: my $result='';
785: if ($target eq 'web' || $target eq 'tex') {
786: &get_attributes(\%ytics,\%tic_defaults,$parstack,$safeeval,
787: $tagstack->[-1]);
788: $current_tics = \%ytics;
789: &Apache::lonxml::register('Apache::lonplot', 'tic');
790: } elsif ($target eq 'edit') {
791: $result .= &Apache::edit::tag_start($target,$token,'ytics');
792: $result .= &edit_attributes($target,$token,\%tic_defaults,
793: \@tic_edit_order);
794: } elsif ($target eq 'modified') {
795: my $constructtag=&Apache::edit::get_new_args
796: ($token,$parstack,$safeeval,keys(%tic_defaults));
797: if ($constructtag) {
798: $result = &Apache::edit::rebuild_tag($token);
799: }
800: }
801: return $result;
802: }
803:
804: sub end_ytics {
805: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
806: my $result = '';
807: if ($target eq 'web' || $target eq 'tex') {
808: &Apache::lonxml::deregister('Apache::lonplot', 'tic');
809: } elsif ($target eq 'edit') {
810: $result.=&Apache::edit::tag_end($target,$token);
811: }
812: return $result;
813: }
814:
815:
816: ##----------------------------------------------------------------
817: #
818: # Tic handling:
819: # The <tic> tag allows users to specify exact Tic positions and labels
820: # for each axis. In this version we only support level 0 tics (major tic).
821: # Each tic has associated with it a position and a label
822: # $current_tics is a reference to the current tick description hash.
823: # We add elements to an array in that has: ticspecs whose elements
824: # are 'pos' - the tick position and 'label' - the tic label.
825: #
826:
827:
828: sub start_tic {
829: my ($target, $token, $tagstack, $parstack, $parser, $safeeval, $style) = @_;
830:
831: my $result = '';
832: if ($target eq 'web' || $target eq 'tex') {
833: my $tic_location = &Apache::lonxml::get_param('location', $parstack, $safeeval);
834: my $tic_label = &Apache::lonxml::get_all_text('/tic', $parser);
835:
836: # Tic location must e a real:
837:
838: if (!&$real_test($tic_location)) {
839: &Apache::lonxml::warning("Tic location: $tic_location must be a real number");
840: } else {
841:
842: if (!defined $current_tics->{'ticspecs'}) {
843: $current_tics->{'ticspecs'} = [];
844: }
845: my $ticspecs = $current_tics->{'ticspecs'};
846: push (@$ticspecs, {'pos' => $tic_location, 'label' => $tic_label});
847: }
848: }
849:
850: return $result;
851: }
852:
853: sub end_tic {
854: return '';
855: }
856:
857: ##-----------------------------------------------------------------font
858: my %font_properties =
859: (
860: 'classic' => {
861: face => 'classic',
862: file => 'DejaVuSansMono-Bold',
863: printname => 'Helvetica',
864: tex_no_file => 1,
865: },
866: 'sans-serif' => {
867: face => 'sans-serif',
868: file => 'DejaVuSans',
869: printname => 'DejaVuSans',
870: },
871: 'serif' => {
872: face => 'serif',
873: file => 'DejaVuSerif',
874: printname => 'DejaVuSerif',
875: },
876: );
877:
878: sub get_font {
879: my ($target) = @_;
880: my ($size, $selected_font);
881:
882: if ( $Apache::lonplot::plot{'font'} =~ /^(small|medium|large)/) {
883: $selected_font = $font_properties{'classic'};
884: if ( $Apache::lonplot::plot{'font'} eq 'small') {
885: $size = '5';
886: } elsif ( $Apache::lonplot::plot{'font'} eq 'medium') {
887: $size = '9';
888: } elsif ( $Apache::lonplot::plot{'font'} eq 'large') {
889: $size = '11';
890: } else {
891: $size = '9';
892: }
893: } else {
894: $size = $Apache::lonplot::plot{'font'};
895: $selected_font = $font_properties{$Apache::lonplot::plot{'fontface'}};
896: }
897: if ($target eq 'tex' && defined($Apache::lonplot::plot{'texfont'})) {
898: # $selected_font = $font_properties{'classic'};
899: $size = $Apache::lonplot::plot{'texfont'};
900: }
901: return ($size, $selected_font);
902: }
903:
904: ##----------------------------------------------------------------- key
905: sub start_key {
906: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
907: my $result='';
908: if ($target eq 'web' || $target eq 'tex') {
909: &get_attributes(\%key,\%key_defaults,$parstack,$safeeval,
910: $tagstack->[-1]);
911: } elsif ($target eq 'edit') {
912: $result .= &Apache::edit::tag_start($target,$token,'Plot Key');
913: $result .= &edit_attributes($target,$token,\%key_defaults);
914: } elsif ($target eq 'modified') {
915: my $constructtag=&Apache::edit::get_new_args
916: ($token,$parstack,$safeeval,keys(%key_defaults));
917: if ($constructtag) {
918: $result = &Apache::edit::rebuild_tag($token);
919: }
920: }
921: return $result;
922: }
923:
924: sub end_key {
925: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
926: my $result = '';
927: if ($target eq 'web' || $target eq 'tex') {
928: } elsif ($target eq 'edit') {
929: $result.=&Apache::edit::tag_end($target,$token);
930: }
931: return $result;
932: }
933:
934: sub parse_label {
935: my ($target,$text) = @_;
936: my $parser=HTML::LCParser->new(\$text);
937: my $result;
938: while (my $token=$parser->get_token) {
939: if ($token->[0] eq 'S') {
940: if ($token->[1] eq 'sub') {
941: $result .= '_{';
942: } elsif ($token->[1] eq 'sup') {
943: $result .= '^{';
944: } else {
945: $result .= $token->[4];
946: }
947: } elsif ($token->[0] eq 'E') {
948: if ($token->[1] eq 'sub'
949: || $token->[1] eq 'sup') {
950: $result .= '}';
951: } else {
952: $result .= $token->[2];
953: }
954: } elsif ($token->[0] eq 'T') {
955: $result .= &replace_entities($target,$token->[1]);
956: }
957: }
958: return $result;
959: }
960:
961: #
962: # Note that there are severe restrictions on font selection in the
963: # ps driver now. later in life Gnuplot is supposed to support
964: # utf-8 fonts in the posts script driver. When this happens,
965: # the tex entries with comments that include the word <FIX>
966: # should be changed to print the correct glyphs rather than some
967: # approximation or fallback of what is intended.
968:
969: my %lookup =
970: ( # Greek alphabet:
971:
972: '(Alpha|#913)' => {'tex' => '{/Symbol A}', 'web' => "\x{391}"},
973: '(Beta|#914)' => {'tex' => '{/Symbol B}', 'web' => "\x{392}"},
974: '(Chi|#935)' => {'tex' => '{/Symbol C}', 'web' => "\x{3A7}"},
975: '(Delta|#916)' => {'tex' => '{/Symbol D}', 'web' => "\x{394}"},
976: '(Epsilon|#917)' => {'tex' => '{/Symbol E}', 'web' => "\x{395}"},
977: '(Phi|#934)' => {'tex' => '{/Symbol F}', 'web' => "\x{3A6}"},
978: '(Gamma|#915)' => {'tex' => '{/Symbol G}', 'web' => "\x{393}"},
979: '(Eta|#919)' => {'tex' => '{/Symbol H}', 'web' => "\x{397}"},
980: '(Iota|#921)' => {'tex' => '{/Symbol I}', 'web' => "\x{399}"},
981: '(Kappa|#922)' => {'tex' => '{/Symbol K}', 'web' => "\x{39A}"},
982: '(Lambda|#923)' => {'tex' => '{/Symbol L}', 'web' => "\x{39B}"},
983: '(Mu|#924)' => {'tex' => '{/Symbol M}', 'web' => "\x{39C}"},
984: '(Nu|#925)' => {'tex' => '{/Symbol N}', 'web' => "\x{39D}"},
985: '(Omicron|#927)' => {'tex' => '{/Symbol O}', 'web' => "\x{39F}"},
986: '(Pi|#928)' => {'tex' => '{/Symbol P}', 'web' => "\x{3A0}"},
987: '(Theta|#920)' => {'tex' => '{/Symbol Q}', 'web' => "\x{398}"},
988: '(Rho|#929)' => {'tex' => '{/Symbol R}', 'web' => "\x{3A1}"},
989: '(Sigma|#931)' => {'tex' => '{/Symbol S}', 'web' => "\x{3A3}"},
990: '(Tau|#932)' => {'tex' => '{/Symbol T}', 'web' => "\x{3A4}"},
991: '(Upsilon|#933)' => {'tex' => '{/Symbol U}', 'web' => "\x{3A5}"},
992: '(Omega|#937)' => {'tex' => '{/Symbol W}', 'web' => "\x{3A9}"},
993: '(Xi|#926)' => {'tex' => '{/Symbol X}', 'web' => "\x{39E}"},
994: '(Psi|#936)' => {'tex' => '{/Symbol Y}', 'web' => "\x{3A8}"},
995: '(Zeta|#918)' => {'tex' => '{/Symbol Z}', 'web' => "\x{396}"},
996: '(alpha|#945)' => {'tex' => '{/Symbol a}', 'web' => "\x{3B1}"},
997: '(beta|#946)' => {'tex' => '{/Symbol b}', 'web' => "\x{3B2}"},
998: '(chi|#967)' => {'tex' => '{/Symbol c}', 'web' => "\x{3C7}"},
999: '(delta|#948)' => {'tex' => '{/Symbol d}', 'web' => "\x{3B4}"},
1000: '(epsilon|#949)' => {'tex' => '{/Symbol e}', 'web' => "\x{3B5}"},
1001: '(phi|#966)' => {'tex' => '{/Symbol f}', 'web' => "\x{3C6}"},
1002: '(gamma|#947)' => {'tex' => '{/Symbol g}', 'web' => "\x{3B3}"},
1003: '(eta|#951)' => {'tex' => '{/Symbol h}', 'web' => "\x{3B7}"},
1004: '(iota|#953)' => {'tex' => '{/Symbol i}', 'web' => "\x{3B9}"},
1005: '(kappa|#954)' => {'tex' => '{/Symbol k}', 'web' => "\x{3BA}"},
1006: '(lambda|#955)' => {'tex' => '{/Symbol k}', 'web' => "\x{3BB}"},
1007: '(mu|#956)' => {'tex' => '{/Symbol m}', 'web' => "\x{3BC}"},
1008: '(nu|#957)' => {'tex' => '{/Symbol n}', 'web' => "\x{3BD}"},
1009: '(omicron|#959)' => {'tex' => '{/Symbol o}', 'web' => "\x{3BF}"},
1010: '(pi|#960)' => {'tex' => '{/Symbol p}', 'web' => "\x{3C0}"},
1011: '(theta|#952)' => {'tex' => '{/Symbol q}', 'web' => "\x{3B8}"},
1012: '(rho|#961)' => {'tex' => '{/Symbol r}', 'web' => "\x{3C1}"},
1013: '(sigma|#963)' => {'tex' => '{/Symbol s}', 'web' => "\x{3C3}"},
1014: '(tau|#964)' => {'tex' => '{/Symbol t}', 'web' => "\x{3C4}"},
1015: '(upsilon|#965)' => {'tex' => '{/Symbol u}', 'web' => "\x{3C5}"},
1016: '(omega|#969)' => {'tex' => '{/Symbol w}', 'web' => "\x{3C9}"},
1017: '(xi|#958)' => {'tex' => '{/Symbol x}', 'web' => "\x{3BE}"},
1018: '(psi|#968)' => {'tex' => '{/Symbol y}', 'web' => "\x{3C8}"},
1019: '(zeta|#950)' => {'tex' => '{/Symbol z}', 'web' => "\x{3B6}"},
1020: '(thetasym|#977)' => {'tex' => '{/Symbol \165}', 'web' => "\x{3d1}"},
1021: '(upsih|#978)' => {'tex' => '{/Symbol \241}', 'web' => "\x{3d2}"},
1022: '(piv|#982)' => {'tex' => '{/Symbol \166}', 'web' => "\x{3d6}"},
1023:
1024:
1025: # Punctuation:
1026:
1027: '(quot|#034)' => {'tex' => '\42', 'web' => '\42'},
1028: '(amp|#038)' => {'tex' => '\46', 'web' => '\46'},
1029: '(lt|#060)' => {'tex' => '\74', 'web' => '\74'},
1030: '(gt|#062)' => {'tex' => '\76', 'web' => '\76'},
1031: '#131' => {'tex' => '{/Symbol \246}', 'web' => "\x{192}"},
1032: '#132' => {'tex' => '{/Text \271}', 'web' => "\x{201e}"},
1033: '#133' => {'tex' => '{/Symbol \274}', 'web'=> "\x{2026}"},
1034: '#134' => {'tex' => '{/Text \262}', 'web' => "\x{2020}"},
1035: '#135' => {'tex' => '{/Text \263}', 'web' => "\x{2021}"},
1036: '#136' => {'tex' => '\\\\^', 'web' => '\\\\^'},
1037: '#137' => {'tex' => '%o', 'web' => "\x{2030}"}, # Per Mille <FIX>
1038: '#138' => {'tex' => 'S', 'web' => "\x{160}"}, # S-Caron <FIX>
1039: '#139' => {'tex' => '<', 'web' => '<'},
1040: '#140' => {'tex' => 'AE', 'web' => "\x{152}"}, # AE ligature <FIX>
1041: '#145' => {'tex' => '\140', 'web' => "\x{2018}"},
1042: '#146' => {'tex' => '\47', 'web' => "\x{2019}"},
1043: '#147' => {'tex' => '\140\140', 'web' => "\x{201c}"}, # Left " <FIX>
1044: '#148' => {'tex' => '\47\47', 'web' => '\\"'}, # Right " <FIX>
1045: '#149' => {'tex' => '{/Symbol \267}', 'web' => "\x{2022}"},
1046: '#150' => {'tex' => '{/Text \55}', 'web' => "\x{2013}"}, # en dash
1047: '#151' => {'tex' => '{/Symbol \55}', 'web' => "\x{2014}"}, # em dash
1048: '#152' => {'tex' => '\\\\~', 'web' => '\\\\~'},
1049: '#153' => {'tex' => '{/Symbol \324}', 'web' => "\x{2122}"}, # trademark
1050:
1051: # Accented letters, and other furreign language glyphs.
1052:
1053: '#154' => {'tex' => 's', 'web' => "\x{161}"}, # small s-caron no ps.
1054: '#155' => {'tex' => '>', 'web' => '\76'}, # >
1055: '#156' => {'tex' => '{/Text \366}', 'web' => "\x{153}"}, # oe ligature.<FIX>
1056: '#159', => {'tex' => 'Y', 'web' => "\x{178}"}, # Y-umlaut - can't print <FIX>
1057: '(nbsp|#160)' => {'tex' => ' ', 'web' => ' '}, # non breaking space.
1058: '(iexcl|#161)' => {'tex' => '{/Text \241}', 'web' => "\x{a1}"}, # inverted !
1059: '(cent|#162)' => {'tex' => '{/Text \242}', 'web' => "\x{a2}"}, # Cent currency.
1060: '(pound|#163)' => {'tex' => '{/Text \243}', 'web' => "\x{a3}"}, # GB Pound currency.
1061: '(curren|#164)' => {'tex' => '{/ZapfDingbats \161}','web' => "\x{a4}"}, # Generic currency symb. <FIX>
1062: '(yen|#165)' => {'tex' => '{/Text \245}', 'web' => "\x{a5}"}, # Yen currency.
1063: '(brvbar|#166)' => {'tex' => '{/Symbol \174}', 'web' => "\x{a6}"}, # Broken vert bar no print.
1064: '(sect|#167)' => {'tex' => '{\247}', 'web' => "\x{a7}"}, # Section symbol.
1065: '(uml|#168)' => {'tex' => '{\250}', 'web' => "\x{a8}"}, # 'naked' umlaut.
1066: '(copy|#169)' => {'tex' => '{/Symbol \343}', 'web' => "\x{a9}"}, # Copyright symbol.
1067: '(ordf|#170)' => {'tex' => '{/Text \343}', 'web' => "\x{aa}"}, # Feminine ordinal.
1068: '(laquo|#171)' => {'tex' => '{/Text \253}', 'web' => "\x{ab}"}, # << quotes.
1069: '(not|#172)' => {'tex' => '\254', 'web' => "\x{ac}"}, # Logical not.
1070: '(shy|#173)' => {'tex' => '\255', 'web' => "\x{ad}"}, # soft hyphen.
1071: '(reg|#174)' => {'tex' => '{/Symbol \342}', 'web' => "\x{ae}"}, # Registered tm.
1072: '(macr|#175)' => {'tex' => '^{\255}', 'web' => "\x{af}"}, # 'naked' macron (overbar).
1073: '(deg|#176)' => {'tex' => '{/Text \260}', 'web' => "\x{b0}"}, # Degree symbo..`
1074: '(plusmn|#177)' => {'tex' => '{/Symbol \261}', 'web' => "\x{b1}"}, # +/- symbol.
1075: '(sup2|#178)' => {'tex' => '^2', 'web' => "\x{b2}"}, # Superscript 2.
1076: '(sup3|#179)' => {'tex' => '^3', 'web' => "\x{b3}"}, # Superscript 3.
1077: '(acute|#180)' => {'tex' => '{/Text \222}', 'web' => "\x{b4}"}, # 'naked' acute accent.
1078: '(micro|#181)' => {'tex' => '{/Symbol \155}', 'web' => "\x{b5}"}, # Micro (small mu).
1079: '(para|#182)' => {'tex' => '{/Text \266}', 'web' => "\x{b6}"}, # Paragraph symbol.
1080: '(middot|#183)' => {'tex' => '\267', 'web' => "\x{b7}"}, # middle dot
1081: '(cedil|#184)' => {'tex' => '\233', 'web' => "\x{b8}"}, # 'naked' cedilla.
1082: '(sup1|#185)' => {'tex' => '^1', 'web' => "\x{b9}"}, # superscript 1.
1083: '(ordm|#186)' => {'tex' => '{\260}', 'web' => "\x{ba}"}, # masculine ordinal.
1084: '(raquo|#187)', => {'tex' => '\273', 'web' => "\x{bb}"}, # Right angle quotes.
1085: '(frac14|#188)' => {'tex' => '\274', 'web' => "\x{bc}"}, # 1/4.
1086: '(frac12|#189)' => {'tex' => '\275', 'web' => "\x{bd}"}, # 1/2.
1087: '(frac34|#190)' => {'tex' => '\276', 'web' => "\x{be}"}, # 3/4
1088: '(iquest|#191)' => {'tex' => '{/Text \277}', 'web' => "\x{bf}"}, # Inverted ?
1089: '(Agrave|#192)' => {'tex' => '\300', 'web' => "\x{c0}"}, # A Grave.
1090: '(Aacute|#193)' => {'tex' => '\301', 'web' => "\x{c1}"}, # A Acute.
1091: '(Acirc|#194)' => {'tex' => '\302', 'web' => "\x{c2}"}, # A Circumflex.
1092: '(Atilde|#195)' => {'tex' => '\303', 'web' => "\x{c3}"}, # A tilde.
1093: '(Auml|#196)' => {'tex' => '\304', 'web' => "\x{c4}"}, # A umlaut.
1094: '(Aring|#197)' => {'tex' => '\305', 'web' => "\x{c5}"}, # A ring.
1095: '(AElig|#198)' => {'tex' => '\306', 'web' => "\x{c6}"}, # AE ligature.
1096: '(Ccedil|#199)' => {'tex' => '\307', 'web' => "\x{c7}"}, # C cedilla
1097: '(Egrave|#200)' => {'tex' => '\310', 'web' => "\x{c8}"}, # E Accent grave.
1098: '(Eacute|#201)' => {'tex' => '\311', 'web' => "\x{c9}"}, # E acute accent.
1099: '(Ecirc|#202)' => {'tex' => '\312', 'web' => "\x{ca}"}, # E Circumflex.
1100: '(Euml|#203)' => {'tex' => '\313', 'web' => "\x{cb}"}, # E umlaut.
1101: '(Igrave|#204)' => {'tex' => '\314', 'web' => "\x{cc}"}, # I grave accent.
1102: '(Iacute|#205)' => {'tex' => '\315', 'web' => "\x{cd}"}, # I acute accent.
1103: '(Icirc|#206)' => {'tex' => '\316', 'web' => "\x{ce}"}, # I circumflex.
1104: '(Iuml|#207)' => {'tex' => '\317', 'web' => "\x{cf}"}, # I umlaut.
1105: '(ETH|#208)' => {'tex' => '\320', 'web' => "\x{d0}"}, # Icelandic Cap eth.
1106: '(Ntilde|#209)' => {'tex' => '\321', 'web' => "\x{d1}"}, # Ntilde (enyan).
1107: '(Ograve|#210)' => {'tex' => '\322', 'web' => "\x{d2}"}, # O accent grave.
1108: '(Oacute|#211)' => {'tex' => '\323', 'web' => "\x{d3}"}, # O accent acute.
1109: '(Ocirc|#212)' => {'tex' => '\324', 'web' => "\x{d4}"}, # O circumflex.
1110: '(Otilde|#213)' => {'tex' => '\325', 'web' => "\x{d5}"}, # O tilde.
1111: '(Ouml|#214)' => {'tex' => '\326', 'web' => "\x{d6}"}, # O umlaut.
1112: '(times|#215)' => {'tex' => '\327', 'web' => "\x{d7}"}, # Times symbol.
1113: '(Oslash|#216)' => {'tex' => '\330', 'web' => "\x{d8}"}, # O slash.
1114: '(Ugrave|#217)' => {'tex' => '\331', 'web' => "\x{d9}"}, # U accent grave.
1115: '(Uacute|#218)' => {'tex' => '\332', 'web' => "\x{da}"}, # U accent acute.
1116: '(Ucirc|#219)' => {'tex' => '\333', 'web' => "\x{db}"}, # U circumflex.
1117: '(Uuml|#220)' => {'tex' => '\334', 'web' => "\x{dc}"}, # U umlaut.
1118: '(Yacute|#221)' => {'tex' => '\335', 'web' => "\x{dd}"}, # Y accent acute.
1119: '(THORN|#222)' => {'tex' => '\336', 'web' => "\x{de}"}, # Icelandic thorn.
1120: '(szlig|#223)' => {'tex' => '\337', 'web' => "\x{df}"}, # German sharfes s.
1121: '(agrave|#224)' => {'tex' => '\340', 'web' => "\x{e0}"}, # a accent grave.
1122: '(aacute|#225)' => {'tex' => '\341', 'web' => "\x{e1}"}, # a grave.
1123: '(acirc|#226)' => {'tex' => '\342', 'web' => "\x{e2}"}, # a circumflex.
1124: '(atilde|#227)' => {'tex' => '\343', 'web' => "\x{e3}"}, # a tilde.
1125: '(auml|#228)' => {'tex' => '\344', 'web' => "\x{e4}"}, # a umlaut
1126: '(aring|#229)' => {'tex' => '\345', 'web' => "\x{e5}"}, # a ring on top.
1127: '(aelig|#230)' => {'tex' => '\346', 'web' => "\x{e6}"}, # ae ligature.
1128: '(ccedil|#231)' => {'tex' => '\347', 'web' => "\x{e7}"}, # C cedilla
1129: '(egrave|#232)' => {'tex' => '\350', 'web' => "\x{e8}"}, # e accent grave.
1130: '(eacute|#233)' => {'tex' => '\351', 'web' => "\x{e9}"}, # e accent acute.
1131: '(ecirc|#234)' => {'tex' => '\352', 'web' => "\x{ea}" }, # e circumflex.
1132: '(euml|#235)' => {'tex' => '\353', 'web' => "\x{eb}"}, # e umlaut.
1133: '(igrave|#236)' => {'tex' => '\354', 'web' => "\x{ec}"}, # i grave.
1134: '(iacute|#237)' => {'tex' => '\355', 'web' => "\x{ed}"}, # i acute.
1135: '(icirc|#238)' => {'tex' => '\356', 'web' => "\x{ee}"}, # i circumflex.
1136: '(iuml|#239)' => {'tex' => '\357', 'web' => "\x{ef}"}, # i umlaut.
1137: '(eth|#240)' => {'tex' => '\360', 'web' => "\x{f0}"}, # Icelandic eth.
1138: '(ntilde|#241)' => {'tex' => '\361', 'web' => "\x{f1}"}, # n tilde.
1139: '(ograve|#242)' => {'tex' => '\362', 'web' => "\x{f2}"}, # o grave.
1140: '(oacute|#243)' => {'tex' => '\363', 'web' => "\x{f3}"}, # o acute.
1141: '(ocirc|#244)' => {'tex' => '\364', 'web' => "\x{f4}"}, # o circumflex.
1142: '(otilde|#245)' => {'tex' => '\365', 'web' => "\x{f5}"}, # o tilde.
1143: '(ouml|#246)' => {'tex' => '\366', 'web' => "\x{f6}"}, # o umlaut.
1144: '(divide|#247)' => {'tex' => '\367', 'web' => "\x{f7}"}, # division symbol
1145: '(oslash|#248)' => {'tex' => '\370', 'web' => "\x{f8}"}, # o slashed.
1146: '(ugrave|#249)' => {'tex' => '\371', 'web' => "\x{f9}"}, # u accent grave.
1147: '(uacute|#250)' => {'tex' => '\372', 'web' => "\x{fa}"}, # u acute.
1148: '(ucirc|#251)' => {'tex' => '\373', 'web' => "\x{fb}"}, # u circumflex.
1149: '(uuml|#252)' => {'tex' => '\374', 'web' => "\x{fc}"}, # u umlaut.
1150: '(yacute|#253)' => {'tex' => '\375', 'web' => "\x{fd}"}, # y acute accent.
1151: '(thorn|#254)' => {'tex' => '\376', 'web' => "\x{fe}"}, # small thorn (icelandic).
1152: '(yuml|#255)' => {'tex' => '\377', 'web' => "\x{ff}"}, # y umlaut.
1153:
1154: # Latin extended A entities:
1155:
1156: '(OElig|#338)' => {'tex' => '{/Text \326}', 'web' => "\x{152}"}, # OE ligature.
1157: '(oelig|#339)' => {'tex' => '{/Text \366}', 'web' => "\x{153}"}, # oe ligature.
1158: '(Scaron|#352)' => {'tex' => 'S', 'web' => "\x{160}"}, # S caron no printable.
1159: '(scaron|#353)' => {'tex' => 's', 'web' => "\x{161}"}, # s caron no printable.
1160: '(Yuml|#376)' => {'tex' => 'Y', 'web' => "\x{178}"}, # Y umlaut - no printable.
1161:
1162: # Latin extended B.
1163:
1164: '(fnof|#402)' => {'tex' =>'{/Symbol \246}', 'web' => "\x{192}"}, # f with little hook.
1165:
1166: # Standalone accents:
1167:
1168: '(circ|#710)' => {'tex' => '^', 'web' => '^'}, # circumflex.
1169: '(tilde|#732)' => {'tex' => '~', 'web' => '~'}, # tilde.
1170:
1171: # General punctuation. We're not able to make a distinction between
1172: # the various length spacings in the print version. (e.g. en/em/thin).
1173: # the various joiners will be empty strings in the print version too.
1174:
1175:
1176: '(ensp|#8194)' => {'tex' => ' ', 'web' => "\x{2002}"}, # en space.
1177: '(emsp|#8195)' => {'tex' => ' ', 'web' => "\x{2003}"}, # em space.
1178: '(thinsp|#8201)' => {'tex' => ' ', 'web' => "\x{2009}"}, # thin space.
1179: '(zwnj|#8204)' => {'tex' => ' ', 'web' => "\x{200c}"}, # Zero width non joiner.
1180: '(zwj|#8205)' => {'tex' => ' ', 'web' => "\x{200d}"}, # Zero width joiner.
1181: '(lrm|#8206)' => {'tex' => ' ', 'web' => "\x{200e}"}, # Left to right mark
1182: '(rlm|#8207)' => {'tex' => ' ', 'web' => "\x{200f}"}, # right to left mark.
1183: '(ndash|#8211)' => {'tex' => '{/Text \55}', 'web' => "\x{2013}"}, # en dash.
1184: '(mdash|#8212)' => {'tex' => '{/Symbol \55}', 'web' => "\x{2014}"}, # em dash.
1185: '(lsquo|#8216)' => {'tex' => '{/Text \140}', 'web' => "\x{2018}"}, # Left single quote.
1186: '(rsquo|#8217)' => {'tex' => '\47', 'web' => "\x{2019}"}, # Right single quote.
1187: '(sbquo|#8218)' => {'tex' => '\54', 'web' => "\x{201a}"}, # Single low-9 quote.
1188: '(ldquo|#8220)' => {'tex' => '\42', 'web' => "\x{201c}"}, # Left double quote.
1189: '(rdquo|#8221)' => {'tex' => '\42', 'web' => "\x{201d}"}, # Right double quote.
1190: '(bdquo|#8222)' => {'tex' => ',', 'web' => "\x{201e}"}, # Double low-9 quote.
1191: '(dagger|#8224)' => {'tex' => '+', 'web' => "\x{2020}"}, # Is this a dagger I see before me now?
1192: '(Dagger|#8225)' => {'tex' => '\261', 'web' => "\x{2021}"}, # it's handle pointing towards my heart?
1193: '(bull|#8226)' => {'tex' => '\267', 'web' => "\x{2022}"}, # Bullet.
1194: '(hellep|#8230)' => {'tex' => '{/Symbol \274}', 'web' => "\x{2026}"}, # Ellipses.
1195: '(permil|#8240)' => {'tex' => '%_o', 'web' => "\x{2031}"}, # Per mille.
1196: '(prime|#8242)' => {'tex' => '\264', 'web' => "\x{2032}"}, # Prime.
1197: '(Prime|#8243)' => {'tex' => '{/Symbol \262}', 'web' => "\x{2033}"}, # double prime.
1198: '(lsaquo|#8249)' => {'tex' => '<', 'web' => "\x{2039}"}, # < quote.
1199: '(rsaquo|#8250)' => {'tex' => '\74', 'web' => "\x{203a}"}, # > quote.
1200: '(oline|#8254)' => {'tex' => '{/Symbol \140}', 'web' => "\x{203e}"}, # Overline.
1201: '(frasl|#8260)' => {'tex' => '/', 'web' => "\x{2044}"}, # Fraction slash.
1202: '(euro|#8364)' => {'tex' => '{/Symbol \240}', 'web' => "\x{20ac}"}, # Euro currency.
1203:
1204: # Letter like symbols.
1205:
1206: '(weierp|#8472)' => {'tex' => '{/Symbol \303}', 'web' => "\x{2118}"}, # Power set symbol
1207: '(image|#8465)' => {'tex' => '{/Symbol \301}', 'web' => "\x{2111}"}, # Imaginary part
1208: '(real|#8476)' => {'tex' => '{/Symbol \302}', 'web' => "\x{211c}"}, # Real part.
1209: '(trade|#8482)' => {'tex' => '{/Symbol \344}', 'web' => "\x{2122}"}, # trademark symbol.
1210: '(alefsym|#8501)' => {'tex' => '{/Symbol \300}', 'web' => "\x{2135}"}, # Hebrew alef.
1211:
1212: # Arrows of various types and directions.
1213: '(larr|#8592)' => {'tex' => '{/Symbol \254}', 'web' => "\x{2190}"}, # <--
1214: '(uarr|#8593)' => {'tex' => '{/Symbol \255}', 'web' => "\x{2191}"}, # up arrow.
1215: '(rarr|#8594)' => {'tex' => '{/Symbol \256}', 'web' => "\x{2192}"}, # -->
1216: '(darr|#8595)' => {'tex' => '{/Symbol \257}', 'web' => "\x{2193}"}, # down arrow.
1217: '(harr|#8596)' => {'tex' => '{/Symbol \253}', 'web' => "\x{2194}"}, # <-->
1218: '(crarr|#8629)' => {'tex' => '{/Symbol \277}', 'web' => "\x{21b5}"}, # corner arrow down and right.
1219: '(lArr|#8656)' => {'tex' => '{/Symbol \334}', 'web' => "\x{21d0}"}, # <==
1220: '(uArr|#8657)' => {'tex' => '{/Symbol \335}', 'web' => "\x{21d1}"}, # Up double arrow.
1221: '(rArr|#8658)' => {'tex' => '{/Symbol \336}', 'web' => "\x{21d2}"}, # ==>
1222: '(dArr|#8659)' => {'tex' => '{/Symbol \337}', 'web' => "\x{21d3}"}, # Down double arrow.
1223: '(hArr|#8660)' => {'tex' => '{/Symbol \333}', 'web' => "\x{21d4}"}, # <==>
1224:
1225: # Mathematical operators. For some of these we do the best we can in printing.
1226:
1227: '(forall|#8704)' => {'tex' => '{/Symbol \42}', 'web' => "\x{2200}"}, # For all.
1228: '(part|#8706)' => {'tex' => '{/Symbol d}', 'web' => "\x{2202}"}, # partial derivative
1229: '(exist|#8707)' => {'tex' => '{/Symbol \44}', 'web' => "\x{2203}"}, # There exists.
1230: '(empty|#8709)' => {'tex' => '{/Symbol \306}', 'web' => "\x{2205}"}, # Null set.
1231: '(nabla|#8711)' => {'tex' => '{/Symbol \321}', 'web' => "\x{2207}"}, # Gradient e.g.
1232: '(isin|#8712)' => {'tex' => '{/Symbol \316}', 'web' => "\x{2208}"}, # Element of the set.
1233: '(notin|#8713)' => {'tex' => '{/Symbol \317}', 'web' => "\x{2209}"}, # Not an element of
1234: '(ni|#8715)' => {'tex' => '{/Symbol \47}', 'web' => "\x{220b}"}, # Contains as a member
1235: '(prod|#8719)' => {'tex' => '{/Symbol \325}', 'web' => "\x{220f}"}, # Product
1236: '(sum|#8721)' => {'tex' => '{/Symbol \345}', 'web' => "\x{2211}"}, # Sum of.
1237: '(minus|#8722)' => {'tex' => '{/Symbol \55}', 'web' => "\x{2212}"}, # - sign.
1238: '(lowast|#8727)' => {'tex' => '*', 'web' => "\x{2217}"}, # *
1239: '(radic|#8730)' => {'tex' => '{/Symbol \326}', 'web' => "\x{221a}"}, # Square root.
1240: '(prop|#8733)' => {'tex' => '{/Symbol \265}', 'web' => "\x{221d}"}, # Proportional to.
1241: '(infin|#8734)' => {'tex' => '{/Symbol \245}', 'web' => "\x{221e}"}, # Infinity.
1242: '(ang|#8736)' => {'tex' => '{/Symbol \320}', 'web' => "\x{2220}"}, # Angle .
1243: '(and|#8743)' => {'tex' => '{/Symbol \331}', 'web' => "\x{2227}"}, # Logical and.
1244: '(or|#8744)' => {'tex' => '{/Symbol \332}', 'web' => "\x{2228}"}, # Logical or.
1245: '(cap|#8745)' => {'tex' => '{/Symbol \307}', 'web' => "\x{2229}"}, # Set intersection.
1246: '(cup|#8746)' => {'tex' => '{/Symbol \310}', 'web' => "\x{222a}"}, # Set union.
1247: '(int|8747)' => {'tex' => '{/Symbol \362}', 'web' => "\x{222b}"}, # Integral.
1248:
1249: # Some gnuplot guru will have to explain to me why the next three
1250: # require the extra slashes... else they print very funkily.
1251:
1252: '(there4|#8756)' => {'tex' => '{/Symbol \\\134}', 'web' => "\x{2234}"}, # Therefore triple dots.
1253: '(sim|#8764)' => {'tex' => '\\\176', 'web' => "\x{223c}"}, # Simlar to.
1254: '(cong|#8773)' => {'tex' => '{/Symbol \\\100}','web' => "\x{2245}"}, # Congruent to/with.
1255:
1256: '(asymp|#8776)' => {'tex' => '{/Symbol \273}', 'web' => "\x{2248}"}, # Asymptotic to.
1257: '(ne|#8800)' => {'tex' => '{/Symbol \271}', 'web' => "\x{2260}"}, # not equal to.
1258: '(equiv|#8801)' => {'tex' => '{/Symbol \272}', 'web' => "\x{2261}"}, # Equivalent to.
1259: '(le|8804)' => {'tex' => '{/Symbol \243}', 'web' => "\x{2264}"}, # Less than or equal to.
1260: '(ge|8805)' => {'tex' => '{/Symbol \263}', 'web' => "\x{2265}"}, # Greater than or equal to
1261: '(sub|8834)' => {'tex' => '{/Symbol \314}', 'web' => "\x{2282}"}, # Subset of.
1262: '(sup|8835)' => {'tex' => '{/Symbol \311}', 'web' => "\x{2283}"}, # Super set of.
1263: '(nsub|8836)' => {'tex' => '{/Symbol \313}', 'web' => "\x{2284}"}, # not subset of.
1264: '(sube|8838)' => {'tex' => '{/Symbol \315}', 'web' => "\x{2286}"}, # Subset or equal.
1265: '(supe|8839)' => {'tex' => '{/Symbol \312}', 'web' => "\x{2287}"}, # Superset or equal
1266: '(oplus|8853)' => {'tex' => '{/Symbol \305}', 'web' => "\x{2295}"}, # O with plus inside
1267: '(otimes|8855)' => {'tex' => '{/Symbol \304}', 'web' => "\x{2297}"}, # O with times.
1268: '(perp|8869)' => {'tex' => '{/Symbol \136}', 'web' => "\x{22a5}"}, # Perpendicular.
1269: '(sdot|8901)' => {'tex' => '{/Symbol \227}', 'web' => "\x{22c5}"}, # Dot operator.
1270:
1271: # Misc. technical symbols:
1272:
1273: '(lceil|8698)' => {'tex' => '{/Symbol \351}', 'web' => "\x{2308}"}, # Left ceiling.
1274: '(rceil|8969)' => {'tex' => '{/Symbol \371}', 'web' => "\x{2309}"}, # Right ceiling.
1275: '(lfloor|8970)' => {'tex' => '{/Symbol \353}', 'web' => "\x{230a}"}, # Left floor.
1276: '(rfloor|8971)' => {'tex' => '{/Symbol \373}', 'web' => "\x{230b}"}, # Right floor.
1277:
1278: # The gnuplot png font evidently does not have the big angle brackets at
1279: # positions 0x2329, 0x232a so use ordinary brackets.
1280:
1281: '(lang|9001)' => {'tex' => '{/Symbol \341}', 'web' => '<'}, # Left angle bracket.
1282: '(rang|9002)' => {'tex' => '{/Symbol \361}', 'web' => '>'}, # Right angle bracket.
1283:
1284: # Gemoetric shapes.
1285:
1286: '(loz|9674)' => {'tex' => '{/Symbol \340}', 'web' => "\x{25ca}"}, # Lozenge.
1287:
1288: # Misc. symbols
1289:
1290: '(spades|9824)' => {'tex' => '{/Symbol \252}', 'web' => "\x{2660}"},
1291: '(clubs|9827)' => {'tex' => '{/Symbol \247}', 'web' => "\x{2663}"},
1292: '(hearts|9829)' => {'tex' => '{/Symbol \251}', 'web' => "\x{2665}"},
1293: '(diams|9830)' => {'tex' => '{/Symbol \250}', 'web' => "\x{2666}"}
1294:
1295: );
1296:
1297:
1298: sub replace_entities {
1299: my ($target,$text) = @_;
1300: $text =~ s{([_^~\{\}]|\\\\)}{\\\\$1}g;
1301: while (my ($re, $replace) = each(%lookup)) {
1302: my $repl = $replace->{$target};
1303: $text =~ s/&$re;/$replace->{$target}/g;
1304: }
1305: $text =~ s{(&)}{\\\\$1}g;
1306: return $text;
1307: }
1308:
1309: ##------------------------------------------------------------------- title
1310: sub start_title {
1311: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1312: my $result='';
1313: if ($target eq 'web' || $target eq 'tex') {
1314: $title = &Apache::lonxml::get_all_text("/title",$parser,$style);
1315: $title=&Apache::run::evaluate($title,$safeeval,$$parstack[-1]);
1316: $title =~ s/\n/ /g;
1317: if (length($title) > $max_str_len) {
1318: $title = substr($title,0,$max_str_len);
1319: }
1320: $title = &parse_label($target,$title);
1321: } elsif ($target eq 'edit') {
1322: $result.=&Apache::edit::tag_start($target,$token,'Plot Title');
1323: my $text=&Apache::lonxml::get_all_text("/title",$parser,$style);
1324: $result.=&Apache::edit::editline('',$text,'',60);
1325: } elsif ($target eq 'modified') {
1326: $result.=&Apache::edit::rebuild_tag($token);
1327: $result.=&Apache::edit::modifiedfield("/title",$parser);
1328: }
1329: return $result;
1330: }
1331:
1332: sub end_title {
1333: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1334: my $result = '';
1335: if ($target eq 'web' || $target eq 'tex') {
1336: } elsif ($target eq 'edit') {
1337: $result.=&Apache::edit::tag_end($target,$token);
1338: }
1339: return $result;
1340: }
1341: ##------------------------------------------------------------------- xlabel
1342: sub start_xlabel {
1343: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1344: my $result='';
1345: if ($target eq 'web' || $target eq 'tex') {
1346: $xlabel = &Apache::lonxml::get_all_text("/xlabel",$parser,$style);
1347: $xlabel=&Apache::run::evaluate($xlabel,$safeeval,$$parstack[-1]);
1348: $xlabel =~ s/\n/ /g;
1349: if (length($xlabel) > $max_str_len) {
1350: $xlabel = substr($xlabel,0,$max_str_len);
1351: }
1352: $xlabel = &parse_label($target,$xlabel);
1353: } elsif ($target eq 'edit') {
1354: $result.=&Apache::edit::tag_start($target,$token,'Plot Xlabel');
1355: my $text=&Apache::lonxml::get_all_text("/xlabel",$parser,$style);
1356: $result.=&Apache::edit::editline('',$text,'',60);
1357: } elsif ($target eq 'modified') {
1358: $result.=&Apache::edit::rebuild_tag($token);
1359: $result.=&Apache::edit::modifiedfield("/xlabel",$parser);
1360: }
1361: return $result;
1362: }
1363:
1364: sub end_xlabel {
1365: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1366: my $result = '';
1367: if ($target eq 'web' || $target eq 'tex') {
1368: } elsif ($target eq 'edit') {
1369: $result.=&Apache::edit::tag_end($target,$token);
1370: }
1371: return $result;
1372: }
1373:
1374: ##------------------------------------------------------------------- ylabel
1375: sub start_ylabel {
1376: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1377: my $result='';
1378: if ($target eq 'web' || $target eq 'tex') {
1379: $ylabel = &Apache::lonxml::get_all_text("/ylabel",$parser,$style);
1380: $ylabel = &Apache::run::evaluate($ylabel,$safeeval,$$parstack[-1]);
1381: $ylabel =~ s/\n/ /g;
1382: if (length($ylabel) > $max_str_len) {
1383: $ylabel = substr($ylabel,0,$max_str_len);
1384: }
1385: $ylabel = &parse_label($target,$ylabel);
1386: } elsif ($target eq 'edit') {
1387: $result .= &Apache::edit::tag_start($target,$token,'Plot Ylabel');
1388: my $text = &Apache::lonxml::get_all_text("/ylabel",$parser,$style);
1389: $result .= &Apache::edit::editline('',$text,'',60);
1390: } elsif ($target eq 'modified') {
1391: $result.=&Apache::edit::rebuild_tag($token);
1392: $result.=&Apache::edit::modifiedfield("/ylabel",$parser);
1393: }
1394: return $result;
1395: }
1396:
1397: sub end_ylabel {
1398: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1399: my $result = '';
1400: if ($target eq 'web' || $target eq 'tex') {
1401: } elsif ($target eq 'edit') {
1402: $result.=&Apache::edit::tag_end($target,$token);
1403: }
1404: return $result;
1405: }
1406:
1407: ##------------------------------------------------------------------- label
1408: sub start_label {
1409: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1410: my $result='';
1411: if ($target eq 'web' || $target eq 'tex') {
1412: my %label;
1413: &get_attributes(\%label,\%label_defaults,$parstack,$safeeval,
1414: $tagstack->[-1]);
1415: my $text = &Apache::lonxml::get_all_text("/label",$parser,$style);
1416: $text = &Apache::run::evaluate($text,$safeeval,$$parstack[-1]);
1417: $text =~ s/\n/ /g;
1418: $text = substr($text,0,$max_str_len) if (length($text) > $max_str_len);
1419: $label{'text'} = &parse_label($target,$text);
1420: push(@labels,\%label);
1421: } elsif ($target eq 'edit') {
1422: $result .= &Apache::edit::tag_start($target,$token,'Plot Label');
1423: $result .= &edit_attributes($target,$token,\%label_defaults);
1424: my $text = &Apache::lonxml::get_all_text("/label",$parser,$style);
1425: $result .= &Apache::edit::end_row().
1426: &Apache::edit::start_spanning_row().
1427: &Apache::edit::editline('',$text,'',60);
1428: } elsif ($target eq 'modified') {
1429: &Apache::edit::get_new_args
1430: ($token,$parstack,$safeeval,keys(%label_defaults));
1431: $result.=&Apache::edit::rebuild_tag($token);
1432: $result.=&Apache::edit::modifiedfield("/label",$parser);
1433: }
1434: return $result;
1435: }
1436:
1437: sub end_label {
1438: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1439: my $result = '';
1440: if ($target eq 'web' || $target eq 'tex') {
1441: } elsif ($target eq 'edit') {
1442: $result.=&Apache::edit::tag_end($target,$token);
1443: }
1444: return $result;
1445: }
1446:
1447: ##------------------------------------------------------------------- curve
1448: sub start_curve {
1449: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1450: my $result='';
1451: &Apache::lonxml::register('Apache::lonplot',('function','data'));
1452: push (@Apache::lonxml::namespace,'curve');
1453: if ($target eq 'web' || $target eq 'tex') {
1454: my %curve;
1455: &get_attributes(\%curve,\%curve_defaults,$parstack,$safeeval,
1456: $tagstack->[-1]);
1457: push (@curves,\%curve);
1458: } elsif ($target eq 'edit') {
1459: $result .= &Apache::edit::tag_start($target,$token,'Curve');
1460: $result .= &edit_attributes($target,$token,\%curve_defaults,
1461: \@curve_edit_order)
1462: .&Apache::edit::end_row()
1463: .&Apache::edit::start_spanning_row();
1464:
1465: } elsif ($target eq 'modified') {
1466: my $constructtag=&Apache::edit::get_new_args
1467: ($token,$parstack,$safeeval,keys(%curve_defaults));
1468: if ($constructtag) {
1469: #
1470: # Fix up the color attribute as jcolor does not prepend an x
1471: #
1472: my $value = $token->[2]{'color'};
1473: if (defined $value && !($value =~ /^x/)) {
1474: $token->[2]{'color'} = 'x' . $value;
1475: }
1476: $result = &Apache::edit::rebuild_tag($token);
1477: }
1478: }
1479: return $result;
1480: }
1481:
1482: sub end_curve {
1483: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1484: my $result = '';
1485: pop @Apache::lonxml::namespace;
1486: &Apache::lonxml::deregister('Apache::lonplot',('function','data'));
1487: if ($target eq 'web' || $target eq 'tex') {
1488: } elsif ($target eq 'edit') {
1489: $result.=&Apache::edit::tag_end($target,$token);
1490: }
1491: return $result;
1492: }
1493:
1494: ##------------------------------------------------------------ curve function
1495: sub start_function {
1496: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1497: my $result='';
1498: if ($target eq 'web' || $target eq 'tex') {
1499: if (exists($curves[-1]->{'data'})) {
1500: &Apache::lonxml::warning
1501: ('Use of the <b>curve function</b> tag precludes use of '.
1502: ' the <b>curve data</b> tag. '.
1503: 'The curve data tag will be omitted in favor of the '.
1504: 'curve function declaration.');
1505: delete $curves[-1]->{'data'} ;
1506: }
1507: my $function = &Apache::lonxml::get_all_text("/function",$parser,
1508: $style);
1509: $function = &Apache::run::evaluate($function,$safeeval,$$parstack[-1]);
1510: $function=~s/\^/\*\*/gs;
1511: $function=~ s/^\s+//; # Trim leading
1512: $function=~ s/\s+$//; # And trailing whitespace.
1513: $curves[-1]->{'function'} = $function;
1514: } elsif ($target eq 'edit') {
1515: $result .= &Apache::edit::tag_start($target,$token,'Gnuplot compatible curve function');
1516: my $text = &Apache::lonxml::get_all_text("/function",$parser,$style);
1517: $result .= &Apache::edit::editline('',$text,'',60);
1518: } elsif ($target eq 'modified') {
1519: $result.=&Apache::edit::rebuild_tag($token);
1520: $result.=&Apache::edit::modifiedfield("/function",$parser);
1521: }
1522: return $result;
1523: }
1524:
1525: sub end_function {
1526: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1527: my $result = '';
1528: if ($target eq 'web' || $target eq 'tex') {
1529: } elsif ($target eq 'edit') {
1530: $result .= &Apache::edit::end_table();
1531: }
1532: return $result;
1533: }
1534:
1535: ##------------------------------------------------------------ curve data
1536: sub start_data {
1537: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1538: my $result='';
1539: if ($target eq 'web' || $target eq 'tex') {
1540: if (exists($curves[-1]->{'function'})) {
1541: &Apache::lonxml::warning
1542: ('Use of the <b>curve function</b> tag precludes use of '.
1543: ' the <b>curve data</b> tag. '.
1544: 'The curve function tag will be omitted in favor of the '.
1545: 'curve data declaration.');
1546: delete($curves[-1]->{'function'});
1547: }
1548: my $datatext = &Apache::lonxml::get_all_text("/data",$parser,$style);
1549: $datatext=&Apache::run::evaluate($datatext,$safeeval,$$parstack[-1]);
1550: # Deal with cases where we're given an array...
1551: if ($datatext =~ /^\@/) {
1552: $datatext = &Apache::run::run('return "'.$datatext.'"',
1553: $safeeval,1);
1554: }
1555: $datatext =~ s/\s+/ /g;
1556: # Need to do some error checking on the @data array -
1557: # make sure it's all numbers and make sure each array
1558: # is of the same length.
1559: my @data;
1560: if ($datatext =~ /,/) { # comma deliminated
1561: @data = split /,/,$datatext;
1562: } else { # Assume it's space separated.
1563: @data = split / /,$datatext;
1564: }
1565: for (my $i=0;$i<=$#data;$i++) {
1566: # Check that it's non-empty
1567: if (! defined($data[$i])) {
1568: &Apache::lonxml::warning(
1569: 'undefined curve data value. Replacing with '.
1570: ' pi/e = 1.15572734979092');
1571: $data[$i] = 1.15572734979092;
1572: }
1573: # Check that it's a number
1574: if (! &$real_test($data[$i]) & ! &$int_test($data[$i])) {
1575: &Apache::lonxml::warning(
1576: 'Bad curve data value of '.$data[$i].' Replacing with '.
1577: ' pi/e = 1.15572734979092');
1578: $data[$i] = 1.15572734979092;
1579: }
1580: }
1581: # complain if the number of data points is not the same as
1582: # in previous sets of data.
1583: if (($curves[-1]->{'data'}) && ($#data != $#{$curves[-1]->{'data'}->[0]})){
1584: &Apache::lonxml::warning
1585: ('Number of data points is not consistent with previous '.
1586: 'number of data points');
1587: }
1588: push @{$curves[-1]->{'data'}},\@data;
1589: } elsif ($target eq 'edit') {
1590: $result .= &Apache::edit::tag_start($target,$token,'Comma or space deliminated curve data');
1591: my $text = &Apache::lonxml::get_all_text("/data",$parser,$style);
1592: $result .= &Apache::edit::editline('',$text,'',60);
1593: } elsif ($target eq 'modified') {
1594: $result.=&Apache::edit::rebuild_tag($token);
1595: $result.=&Apache::edit::modifiedfield("/data",$parser);
1596: }
1597: return $result;
1598: }
1599:
1600: sub end_data {
1601: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1602: my $result = '';
1603: if ($target eq 'web' || $target eq 'tex') {
1604: } elsif ($target eq 'edit') {
1605: $result .= &Apache::edit::end_table();
1606: }
1607: return $result;
1608: }
1609:
1610: ##------------------------------------------------------------------- axis
1611: sub start_axis {
1612: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1613: my $result='';
1614: if ($target eq 'web' || $target eq 'tex') {
1615: &get_attributes(\%axis,\%axis_defaults,$parstack,$safeeval,
1616: $tagstack->[-1]);
1617: } elsif ($target eq 'edit') {
1618: $result .= &Apache::edit::tag_start($target,$token,'Plot Axes');
1619: $result .= &edit_attributes($target,$token,\%axis_defaults,
1620: \@axis_edit_order);
1621: } elsif ($target eq 'modified') {
1622: my $constructtag=&Apache::edit::get_new_args
1623: ($token,$parstack,$safeeval,keys(%axis_defaults));
1624:
1625: if ($constructtag) {
1626: #
1627: # Fix up the color attribute since jchooser does not
1628: # prepend an x to the color:
1629: #
1630: my $value = $token->[2]{'color'};
1631: if (defined $value && !($value =~ /^x/)) {
1632: $token->[2]{'color'} = 'x' . $value;
1633: }
1634:
1635: $result = &Apache::edit::rebuild_tag($token);
1636: }
1637: }
1638: return $result;
1639: }
1640:
1641: sub end_axis {
1642: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1643: my $result = '';
1644: if ($target eq 'web' || $target eq 'tex') {
1645: } elsif ($target eq 'edit') {
1646: $result.=&Apache::edit::tag_end($target,$token);
1647: } elsif ($target eq 'modified') {
1648: }
1649: return $result;
1650: }
1651:
1652: ###################################################################
1653: ## ##
1654: ## Utility Functions ##
1655: ## ##
1656: ###################################################################
1657:
1658: ##----------------------------------------------------------- set_defaults
1659: sub set_defaults {
1660: my ($var,$defaults) = @_;
1661: my $key;
1662: foreach $key (keys(%$defaults)) {
1663: $var->{$key} = $defaults->{$key}->{'default'};
1664: }
1665: }
1666:
1667: ##------------------------------------------------------------------- misc
1668: sub get_attributes{
1669: my ($values,$defaults,$parstack,$safeeval,$tag) = @_;
1670: foreach my $attr (keys(%{$defaults})) {
1671: if ($attr eq 'texwidth' || $attr eq 'texfont') {
1672: $values->{$attr} =
1673: &Apache::lonxml::get_param($attr,$parstack,$safeeval,undef,1);
1674: } else {
1675: $values->{$attr} =
1676: &Apache::lonxml::get_param($attr,$parstack,$safeeval);
1677: }
1678: if ($values->{$attr} eq '' | !defined($values->{$attr})) {
1679: $values->{$attr} = $defaults->{$attr}->{'default'};
1680: next;
1681: }
1682: my $test = $defaults->{$attr}->{'test'};
1683: if (! &$test($values->{$attr})) {
1684: &Apache::lonxml::warning
1685: ($tag.':'.$attr.': Bad value.'.'Replacing your value with : '
1686: .$defaults->{$attr}->{'default'} );
1687: $values->{$attr} = $defaults->{$attr}->{'default'};
1688: }
1689: }
1690: return ;
1691: }
1692: ##
1693: # Generate tic mark specifications.
1694: #
1695: # @param type - type of tics (xtics or ytics).
1696: # @param spec - Reference to a hash that contains the tic specification.
1697: # @param target - 'tex' if hard copy target.
1698: #
1699: # @return string - the tic specification command.
1700: #
1701: sub generate_tics {
1702: my ($type, $spec, $target) = @_;
1703: my $result = '';
1704:
1705:
1706: if (defined %$spec) {
1707:
1708:
1709:
1710: # Major tics: - If there are 'ticspecs' these override any other
1711: # specifications:
1712:
1713:
1714:
1715: $result .= "set $type $spec->{'location'} ";
1716: $result .= ($spec->{'mirror'} eq 'on') ? 'mirror ' : 'nomirror ';
1717: if (defined $spec->{'ticspecs'}) {
1718: $result .= '( ';
1719: my @ticspecs;
1720: my $ticinfo = $spec->{'ticspecs'};
1721: foreach my $tic (@$ticinfo) {
1722: push(@ticspecs, '"' . $tic->{'label'} . '" ' . $tic->{'pos'} );
1723: }
1724: $result .= join(', ', (@ticspecs));
1725: $result .= ' )';
1726: } else {
1727: $result .= "$spec->{'start'}, ";
1728: $result .= "$spec->{'increment'}, ";
1729: $result .= "$spec->{'end'} ";
1730: }
1731: if ($target eq 'tex' ) {
1732: $result .= 'font "Helvetica,22"';
1733: }
1734: $result .= "\n";
1735:
1736: # minor frequency:
1737:
1738: if ($spec->{'minorfreq'} != 0) {
1739: $result .= "set m$type $spec->{'minorfreq'}\n";
1740: }
1741: } else {
1742: $result .= "set $type font " . '"Helvetica,22"' ."\n";
1743: }
1744:
1745:
1746: return $result;
1747: }
1748:
1749: ##------------------------------------------------------- write_gnuplot_file
1750: sub write_gnuplot_file {
1751: my ($tmpdir,$filename,$target)= @_;
1752: my ($fontsize, $font_properties) = &get_font($target);
1753: my $gnuplot_input = '';
1754: my $curve;
1755: #
1756: # Check to be sure we do not have any empty curves
1757: my @curvescopy;
1758: foreach my $curve (@curves) {
1759: if (exists($curve->{'function'})) {
1760: if ($curve->{'function'} !~ /^\s*$/) {
1761: push(@curvescopy,$curve);
1762: }
1763: } elsif (exists($curve->{'data'})) {
1764: foreach my $data (@{$curve->{'data'}}) {
1765: if (scalar(@$data) > 0) {
1766: push(@curvescopy,$curve);
1767: last;
1768: }
1769: }
1770: }
1771: }
1772: @curves = @curvescopy;
1773: # Collect all the colors
1774: my @Colors;
1775: push @Colors, $Apache::lonplot::plot{'bgcolor'};
1776: push @Colors, $Apache::lonplot::plot{'fgcolor'};
1777: push @Colors, (defined($axis{'color'})?$axis{'color'}:$Apache::lonplot::plot{'fgcolor'});
1778: foreach $curve (@curves) {
1779: push @Colors, ($curve->{'color'} ne '' ?
1780: $curve->{'color'} :
1781: $Apache::lonplot::plot{'fgcolor'} );
1782: }
1783:
1784: # set term
1785: if ($target eq 'web') {
1786: $gnuplot_input .= 'set terminal png enhanced nocrop ';
1787: $gnuplot_input .= 'transparent ' if ($Apache::lonplot::plot{'transparent'} eq 'on');
1788: $gnuplot_input .= 'font "'.$Apache::lonnet::perlvar{'lonFontsDir'}.
1789: '/'.$font_properties->{'file'}.'.ttf" ';
1790: $gnuplot_input .= $fontsize;
1791: $gnuplot_input .= ' size '.$Apache::lonplot::plot{'width'}.','.$Apache::lonplot::plot{'height'}.' ';
1792: $gnuplot_input .= "@Colors\n";
1793: # set output
1794: $gnuplot_input .= "set output\n";
1795: } elsif ($target eq 'tex') {
1796: $gnuplot_input .= "set term postscript eps enhanced $Apache::lonplot::plot{'plotcolor'} dash ";
1797: if (!$font_properties->{'tex_no_file'}) {
1798: $gnuplot_input .=
1799: 'fontfile "'.$Apache::lonnet::perlvar{'lonFontsDir'}.
1800: '/'.$font_properties->{'file'}.'.pfb" ';
1801: }
1802: $gnuplot_input .= ' "'.$font_properties->{'printname'}.'" ';
1803: $gnuplot_input .= $fontsize;
1804: $gnuplot_input .= "\nset output \"".$tmpdir.
1805: &unescape($filename).".eps\"\n";
1806: $gnuplot_input .= "set encoding iso_8859_1\n"; # Get access to extended font.
1807:
1808: }
1809: $gnuplot_input .= "set encoding utf8\n";
1810: # cartesian or polar plot?
1811: if (lc($Apache::lonplot::plot{'plottype'}) eq 'polar') {
1812: $gnuplot_input .= 'set polar'.$/;
1813: } else {
1814: # Assume Cartesian
1815: }
1816: # cartesian or polar grid?
1817: if (lc($Apache::lonplot::plot{'gridtype'}) eq 'polar') {
1818: $gnuplot_input .= 'set grid polar'.$/;
1819: } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'linear-log') {
1820: $gnuplot_input .= 'set logscale x'.$/;
1821: } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'log-linear') {
1822: $gnuplot_input .= 'set logscale y'.$/;
1823: } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'log-log') {
1824: $gnuplot_input .= 'set logscale x'.$/;
1825: $gnuplot_input .= 'set logscale y'.$/;
1826: } else {
1827: # Assume Cartesian
1828: }
1829: # solid or pattern for boxes?
1830: if (lc($Apache::lonplot::plot{'fillstyle'}) eq 'solid') {
1831: $gnuplot_input .= 'set style fill solid '.
1832: $Apache::lonplot::plot{'solid'}.$Apache::lonplot::plot{'box_border'}.$/;
1833: } elsif (lc($Apache::lonplot::plot{'fillstyle'}) eq 'pattern') {
1834: $gnuplot_input .= 'set style fill pattern '.$Apache::lonplot::plot{'pattern'}.$Apache::lonplot::plot{'box_border'}.$/;
1835: } elsif (lc($Apache::lonplot::plot{'fillstyle'}) eq 'empty') {
1836: }
1837: # margin
1838: if (lc($Apache::lonplot::plot{'lmargin'}) ne 'default') {
1839: $gnuplot_input .= 'set lmargin '.$Apache::lonplot::plot{'lmargin'}.$/;
1840: }
1841: if (lc($Apache::lonplot::plot{'rmargin'}) ne 'default') {
1842: $gnuplot_input .= 'set rmargin '.$Apache::lonplot::plot{'rmargin'}.$/;
1843: }
1844: if (lc($Apache::lonplot::plot{'tmargin'}) ne 'default') {
1845: $gnuplot_input .= 'set tmargin '.$Apache::lonplot::plot{'tmargin'}.$/;
1846: }
1847: if (lc($Apache::lonplot::plot{'bmargin'}) ne 'default') {
1848: $gnuplot_input .= 'set bmargin '.$Apache::lonplot::plot{'bmargin'}.$/;
1849: }
1850:
1851: # tic scales
1852: if ($version > 4) {
1853: $gnuplot_input .= 'set tics scale '.
1854: $Apache::lonplot::plot{'major_ticscale'}.', '.$Apache::lonplot::plot{'minor_ticscale'}.$/;
1855: } else {
1856: $gnuplot_input .= 'set ticscale '.
1857: $Apache::lonplot::plot{'major_ticscale'}.' '.$Apache::lonplot::plot{'minor_ticscale'}.$/;
1858: }
1859: #boxwidth
1860: if (lc($Apache::lonplot::plot{'boxwidth'}) ne '') {
1861: $gnuplot_input .= 'set boxwidth '.$Apache::lonplot::plot{'boxwidth'}.$/;
1862: }
1863: # gridlayer
1864: $gnuplot_input .= 'set grid noxtics noytics front '.$/
1865: if ($Apache::lonplot::plot{'gridlayer'} eq 'on');
1866:
1867: # grid
1868: $gnuplot_input .= 'set grid'.$/ if ($Apache::lonplot::plot{'grid'} eq 'on');
1869: # border
1870: $gnuplot_input .= ($Apache::lonplot::plot{'border'} eq 'on'?
1871: 'set border'.$/ :
1872: 'set noborder'.$/ );
1873: # sampling rate for non-data curves
1874: $gnuplot_input .= "set samples $Apache::lonplot::plot{'samples'}\n";
1875: # title, xlabel, ylabel
1876: # titles
1877: my $extra_space_x = ($xtics{'location'} eq 'axis') ? ' 0, -0.5 ' : '';
1878: my $extra_space_y = ($ytics{'location'} eq 'axis') ? ' -0.5, 0 ' : '';
1879:
1880: if ($target eq 'tex') {
1881: $gnuplot_input .= "set title \"$title\" font \"".$font_properties->{'printname'}.",".$fontsize."pt\"\n" if (defined($title)) ;
1882: $gnuplot_input .= "set xlabel \"$xlabel\" $extra_space_x font \"".$font_properties->{'printname'}.",".$fontsize."pt\"\n" if (defined($xlabel));
1883: $gnuplot_input .= "set ylabel \"$ylabel\" $extra_space_y font \"".$font_properties->{'printname'}.",".$fontsize."pt\"\n" if (defined($ylabel));
1884: } else {
1885: $gnuplot_input .= "set title \"$title\" \n" if (defined($title)) ;
1886: $gnuplot_input .= "set xlabel \"$xlabel\" $extra_space_x \n" if (defined($xlabel));
1887: $gnuplot_input .= "set ylabel \"$ylabel\" $extra_space_y \n" if (defined($ylabel));
1888: }
1889: # tics
1890: $gnuplot_input .= &generate_tics('xtics', \%xtics, $target);
1891:
1892: $gnuplot_input .= &generate_tics('ytics', \%ytics, $target);
1893:
1894: # axis
1895: if (%axis) {
1896: if ($axis{'xformat'} ne 'on') {
1897: $gnuplot_input .= "set format x ";
1898: if ($axis{'xformat'} eq 'off') {
1899: $gnuplot_input .= "\"\"\n";
1900: } else {
1901: $gnuplot_input .= "\"\%.".$axis{'xformat'}."\"\n";
1902: }
1903: }
1904: if ($axis{'yformat'} ne 'on') {
1905: $gnuplot_input .= "set format y ";
1906: if ($axis{'yformat'} eq 'off') {
1907: $gnuplot_input .= "\"\"\n";
1908: } else {
1909: $gnuplot_input .= "\"\%.".$axis{'yformat'}."\"\n";
1910: }
1911: }
1912: $gnuplot_input .= "set xrange \[$axis{'xmin'}:$axis{'xmax'}\]\n";
1913: $gnuplot_input .= "set yrange \[$axis{'ymin'}:$axis{'ymax'}\]\n";
1914: if ($axis{'xzero'} ne 'off') {
1915: $gnuplot_input .= "set xzeroaxis ";
1916: if ($axis{'xzero'} eq 'line' || $axis{'xzero'} eq 'thick-line') {
1917: $gnuplot_input .= "lt -1 ";
1918: if ($axis{'xzero'} eq 'thick-line') {
1919: $gnuplot_input .= "lw 3 ";
1920: }
1921: }
1922: $gnuplot_input .= "\n";
1923: }
1924: if ($axis{'yzero'} ne 'off') {
1925: $gnuplot_input .= "set yzeroaxis ";
1926: if ($axis{'yzero'} eq 'line' || $axis{'yzero'} eq 'thick-line') {
1927: $gnuplot_input .= "lt -1 ";
1928: if ($axis{'yzero'} eq 'thick-line') {
1929: $gnuplot_input .= "lw 3 ";
1930: }
1931: }
1932: $gnuplot_input .= "\n";
1933: }
1934: }
1935: # Key
1936: if (%key) {
1937: $gnuplot_input .= 'set key '.$key{'pos'}.' ';
1938: if ($key{'title'} ne '') {
1939: $gnuplot_input .= 'title "'.$key{'title'}.'" ';
1940: }
1941: $gnuplot_input .= ($key{'box'} eq 'on' ? 'box ' : 'nobox ').$/;
1942: } else {
1943: $gnuplot_input .= 'set nokey'.$/;
1944: }
1945: # labels
1946: my $label;
1947: foreach $label (@labels) {
1948: $gnuplot_input .= 'set label "'.$label->{'text'}.'" at '.
1949: $label->{'xpos'}.','.$label->{'ypos'};
1950: if ($label->{'rotate'} ne '') {
1951: $gnuplot_input .= ' rotate by '.$label->{'rotate'};
1952: }
1953: $gnuplot_input .= ' '.$label->{'justify'};
1954:
1955: if ($target eq 'tex') {
1956: $gnuplot_input .=' font "'.$font_properties->{'printname'}.','.$fontsize.'pt"' ;
1957: }
1958: $gnuplot_input .= $/;
1959: }
1960: if ($target eq 'tex') {
1961: $gnuplot_input .="set size 1,".$Apache::lonplot::plot{'height'}/$Apache::lonplot::plot{'width'}*1.38;
1962: $gnuplot_input .="\n";
1963: }
1964: # curves
1965: #
1966: # Each curve will have its very own linestyle.
1967: # (This should work just fine in web rendition I think).
1968: # The line_xxx variables will hold the elements of the line style.
1969: # type (solid/dashed), color, width
1970: #
1971: my $linestyle_index = 50;
1972: my $line_width = '';
1973:
1974: # If arrows are needed there will be an arrow style for each as well:
1975: #
1976:
1977: my $arrow_style_index = 50;
1978:
1979: my $plot_command;
1980: my $plot_type;
1981:
1982: for (my $i = 0;$i<=$#curves;$i++) {
1983: $curve = $curves[$i];
1984: $plot_command.= ', ' if ($i > 0);
1985: if ($target eq 'tex') {
1986: $curve->{'linewidth'} *= 2;
1987: }
1988: $line_width = $curve->{'linewidth'};
1989: if (exists($curve->{'function'})) {
1990: $plot_type =
1991: $curve->{'function'}.' title "'.
1992: $curve->{'name'}.'" with '.
1993: $curve->{'linestyle'};
1994: } elsif (exists($curve->{'data'})) {
1995: # Store data values in $datatext
1996: my $datatext = '';
1997: # get new filename
1998: my $datafilename = "$tmpdir/$filename.data.$i";
1999: my $fh=Apache::File->new(">$datafilename");
2000: # Compile data
2001: my @Data = @{$curve->{'data'}};
2002: my @Data0 = @{$Data[0]};
2003: for (my $i =0; $i<=$#Data0; $i++) {
2004: my $dataset;
2005: foreach $dataset (@Data) {
2006: $datatext .= $dataset->[$i] . ' ';
2007: }
2008: $datatext .= $/;
2009: }
2010: # write file
2011: print $fh $datatext;
2012: close($fh);
2013: # generate gnuplot text
2014: $plot_type = '"'.$datafilename.'" title "'.
2015: $curve->{'name'}.'" with '.
2016: $curve->{'linestyle'};
2017: }
2018: my $pointtype = '';
2019: my $pointsize = '';
2020:
2021: # Figure out the linestyle:
2022:
2023: my $lt = $curve->{'linetype'} ne '' ? $curve->{'linetype'}
2024: : 'solid'; # Line type defaults to solid.
2025: # The mapping of lt -> the actual gnuplot line type depends on the target:
2026:
2027: if ($target eq 'tex') {
2028: $lt = $ps_linetypes{$lt};
2029: } else {
2030: $lt = $linetypes{$lt}
2031: }
2032:
2033: my $color = $curve->{'color'};
2034: $color =~ s/^x/#/; # Convert xhex color -> #hex color.
2035:
2036: my $style_command = "set style line $linestyle_index $pointtype $pointsize linetype $lt linewidth $line_width lc rgb '$color'\n";
2037: $gnuplot_input .= $style_command;
2038:
2039:
2040:
2041: if (($curve->{'linestyle'} eq 'points') ||
2042: ($curve->{'linestyle'} eq 'linespoints') ||
2043: ($curve->{'linestyle'} eq 'errorbars') ||
2044: ($curve->{'linestyle'} eq 'xerrorbars') ||
2045: ($curve->{'linestyle'} eq 'yerrorbars') ||
2046: ($curve->{'linestyle'} eq 'xyerrorbars')) {
2047:
2048: $pointtype =' pointtype '.$curve->{'pointtype'};
2049: $pointsize =' pointsize '.$curve->{'pointsize'};
2050: } elsif ($curve->{'linestyle'} eq 'filledcurves') {
2051: $plot_command.= ' '.$curve->{'limit'};
2052: } elsif ($curve->{'linestyle'} eq 'vector') {
2053:
2054: # Create the arrow head style add it to
2055: # $gnuplot_input..and ensure it gets
2056: # Selected in the plot command.
2057:
2058: $gnuplot_input .= "set style arrow $arrow_style_index ";
2059: $gnuplot_input .= ' ' . $curve->{'arrowhead'};
2060: $gnuplot_input .= ' size ' . $curve->{'arrowlength'};
2061: $gnuplot_input .= ','.$curve->{'arrowangle'};
2062: $gnuplot_input .= ',' . $curve->{'arrowbackangle'};
2063: $gnuplot_input .= ' ' . $curve->{'arrowstyle'} . " ls $linestyle_index\n";
2064:
2065:
2066: $plot_command .= " arrowstyle $arrow_style_index ";
2067: $arrow_style_index++;
2068: }
2069:
2070:
2071:
2072:
2073: # The condition below is because gnuplot lumps the linestyle in with the
2074: # arrowstyle _sigh_.
2075:
2076: if ($curve->{'linestyle'} ne 'vector') {
2077: $plot_command.= " ls $linestyle_index";
2078: }
2079:
2080: $gnuplot_input .= 'plot ' . $plot_type . ' ' . $plot_command . "\n";
2081: $linestyle_index++; # Each curve get a unique linestyle.
2082: }
2083: # Write the output to a file.
2084: # &Apache::lonnet::logthis($gnuplot_input); # uncomment to log the gnuplot input.
2085: open (my $fh, "> $tmpdir$filename.data");
2086: binmode($fh, ':utf8');
2087: print $fh $gnuplot_input;
2088: close($fh);
2089: # That's all folks.
2090: return ;
2091: }
2092:
2093: #---------------------------------------------- check_inputs
2094: sub check_inputs {
2095: ## Note: no inputs, no outputs - this acts only on global variables.
2096: ## Make sure we have all the input we need:
2097: if (! %Apache::lonplot::plot) { &set_defaults(\%Apache::lonplot::plot,\%gnuplot_defaults); }
2098: if (! %key ) {} # No key for this plot, thats okay
2099: # if (! %axis) { &set_defaults(\%axis,\%axis_defaults); }
2100: if (! defined($title )) {} # No title for this plot, thats okay
2101: if (! defined($xlabel)) {} # No xlabel for this plot, thats okay
2102: if (! defined($ylabel)) {} # No ylabel for this plot, thats okay
2103: if ($#labels < 0) { } # No labels for this plot, thats okay
2104: if ($#curves < 0) {
2105: &Apache::lonxml::warning("No curves specified for plot!!!!");
2106: return '';
2107: }
2108: my $curve;
2109: foreach $curve (@curves) {
2110: if (!defined($curve->{'function'})&&!defined($curve->{'data'})){
2111: &Apache::lonxml::warning("One of the curves specified did not contain any curve data or curve function declarations\n");
2112: return '';
2113: }
2114: }
2115: }
2116:
2117: #------------------------------------------------ make_edit
2118: sub edit_attributes {
2119: my ($target,$token,$defaults,$keys) = @_;
2120: my ($result,@keys);
2121: if ($keys && ref($keys) eq 'ARRAY') {
2122: @keys = @$keys;
2123: } else {
2124: @keys = sort(keys(%$defaults));
2125: }
2126: foreach my $attr (@keys) {
2127: # append a ' ' to the description if it doesn't have one already.
2128: my $description = $defaults->{$attr}->{'description'};
2129: $description .= ' ' if ($description !~ / $/);
2130: if ($defaults->{$attr}->{'edit_type'} eq 'entry') {
2131: $result .= &Apache::edit::text_arg
2132: ($description,$attr,$token,
2133: $defaults->{$attr}->{'size'},
2134: $defaults->{$attr}->{'class'});
2135: } elsif ($defaults->{$attr}->{'edit_type'} eq 'choice') {
2136: $result .= &Apache::edit::select_or_text_arg
2137: ($description,$attr,$defaults->{$attr}->{'choices'},$token);
2138: } elsif ($defaults->{$attr}->{'edit_type'} eq 'onoff') {
2139: $result .= &Apache::edit::select_or_text_arg
2140: ($description,$attr,['on','off'],$token);
2141: }
2142: $result .= '<br />';
2143: }
2144: return $result;
2145: }
2146:
2147:
2148: ###################################################################
2149: ## ##
2150: ## Insertion functions for editing plots ##
2151: ## ##
2152: ###################################################################
2153:
2154: sub insert_gnuplot {
2155: my $result = '';
2156: # plot attributes
2157: $result .= "\n<gnuplot ";
2158: foreach my $attr (keys(%gnuplot_defaults)) {
2159: $result .= "\n $attr=\"$gnuplot_defaults{$attr}->{'default'}\"";
2160: }
2161: $result .= ">";
2162: # Add the components (most are commented out for simplicity)
2163: # $result .= &insert_key();
2164: # $result .= &insert_axis();
2165: # $result .= &insert_title();
2166: # $result .= &insert_xlabel();
2167: # $result .= &insert_ylabel();
2168: $result .= &insert_curve();
2169: # close up the <gnuplot>
2170: $result .= "\n</gnuplot>";
2171: return $result;
2172: }
2173:
2174: sub insert_tics {
2175: my $result;
2176: $result .= &insert_xtics() . &insert_ytics;
2177: return $result;
2178: }
2179:
2180: sub insert_xtics {
2181: my $result;
2182: $result .= "\n <xtics ";
2183: foreach my $attr (keys(%tic_defaults)) {
2184: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
2185: }
2186: $result .= "/>";
2187: return $result;
2188: }
2189:
2190: sub insert_ytics {
2191: my $result;
2192: $result .= "\n <ytics ";
2193: foreach my $attr (keys(%tic_defaults)) {
2194: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
2195: }
2196: $result .= "/>";
2197: return $result;
2198: }
2199:
2200: sub insert_key {
2201: my $result;
2202: $result .= "\n <key ";
2203: foreach my $attr (keys(%key_defaults)) {
2204: $result .= "\n $attr=\"$key_defaults{$attr}->{'default'}\"";
2205: }
2206: $result .= " />";
2207: return $result;
2208: }
2209:
2210: sub insert_axis{
2211: my $result;
2212: $result .= "\n <axis ";
2213: foreach my $attr (keys(%axis_defaults)) {
2214: $result .= "\n $attr=\"$axis_defaults{$attr}->{'default'}\"";
2215: }
2216: $result .= " />";
2217: return $result;
2218: }
2219:
2220: sub insert_title { return "\n <title></title>"; }
2221: sub insert_xlabel { return "\n <xlabel></xlabel>"; }
2222: sub insert_ylabel { return "\n <ylabel></ylabel>"; }
2223:
2224: sub insert_label {
2225: my $result;
2226: $result .= "\n <label ";
2227: foreach my $attr (keys(%label_defaults)) {
2228: $result .= "\n $attr=\"".
2229: $label_defaults{$attr}->{'default'}."\"";
2230: }
2231: $result .= "></label>";
2232: return $result;
2233: }
2234:
2235: sub insert_curve {
2236: my $result;
2237: $result .= "\n <curve ";
2238: foreach my $attr (keys(%curve_defaults)) {
2239: $result .= "\n $attr=\"".
2240: $curve_defaults{$attr}->{'default'}."\"";
2241: }
2242: $result .= " >";
2243: $result .= &insert_data().&insert_data()."\n </curve>";
2244: }
2245:
2246: sub insert_function {
2247: my $result;
2248: $result .= "\n <function></function>";
2249: return $result;
2250: }
2251:
2252: sub insert_data {
2253: my $result;
2254: $result .= "\n <data></data>";
2255: return $result;
2256: }
2257:
2258: ##----------------------------------------------------------------------
2259: 1;
2260: __END__
2261:
2262:
2263: =head1 NAME
2264:
2265: Apache::lonplot.pm
2266:
2267: =head1 SYNOPSIS
2268:
2269: XML-based plotter of graphs
2270:
2271: This is part of the LearningOnline Network with CAPA project
2272: described at http://www.lon-capa.org.
2273:
2274:
2275: =head1 SUBROUTINES (parsing and edit rendering)
2276:
2277: =over
2278:
2279: =item start_gnuplot()
2280:
2281: =item end_gnuplot()
2282:
2283: =item start_xtics()
2284:
2285: =item end_xtics()
2286:
2287: =item start_ytics()
2288:
2289: =item end_ytics()
2290:
2291: =item get_font()
2292:
2293: =item start_key()
2294:
2295: =item end_key()
2296:
2297: =item parse_label()
2298:
2299: =item replace_entities()
2300:
2301: =item start_title()
2302:
2303: =item end_title()
2304:
2305: =item start_xlabel()
2306:
2307: =item end_xlabel()
2308:
2309: =item start_ylabel()
2310:
2311: =item end_label()
2312:
2313: =item start_curve()
2314:
2315: =item end_curve()
2316:
2317: =item start_function()
2318:
2319: =item end_function()
2320:
2321: =item start_data()
2322:
2323: =item end_data()
2324:
2325: =item start_axis()
2326:
2327: =item end_axis
2328:
2329: =back
2330:
2331: =head1 SUBROUTINES (Utility)
2332:
2333: =over
2334:
2335: =item set_defaults()
2336:
2337: =item get_attributes()
2338:
2339: =item write_gnuplot_file()
2340:
2341: =item check_inputs()
2342:
2343: =item edit_attributes()
2344:
2345: =back
2346:
2347: =head1 SUBROUTINES (Insertion functions for editing plots)
2348:
2349: =over
2350:
2351: =item insert_gnuplot()
2352:
2353: =item insert_tics()
2354:
2355: =item insert_xtics()
2356:
2357: =item insert_key()
2358:
2359: =item insert_axis()
2360:
2361: =item insert_title()
2362:
2363: =item insert_xlabel()
2364:
2365: =item insert_ylabel()
2366:
2367: =item insert_label()
2368:
2369: =item insert_curve()
2370:
2371: =item insert_function()
2372:
2373: =item insert_data()
2374:
2375: =back
2376:
2377: =cut
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