1: # The LearningOnline Network with CAPA
2: # Dynamic plot
3: #
4: # $Id: lonplot.pm,v 1.185 2022/09/21 11:49:48 raeburn Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28:
29:
30:
31:
32: package Apache::lonplot;
33:
34: use strict;
35: use warnings FATAL=>'all';
36: no warnings 'uninitialized';
37: use Apache::File;
38: use Apache::response;
39: use Apache::lonxml;
40: use Apache::edit;
41: use Apache::lonnet;
42: use Apache::lonlocal;
43: use Time::HiRes qw(gettimeofday);
44: use LONCAPA;
45:
46: use vars qw/$weboutputformat $version $colorprefix/;
47:
48:
49:
50: BEGIN {
51: &Apache::lonxml::register('Apache::lonplot',('gnuplot'));
52: #
53: # Determine the version of GNUPLOT
54: $weboutputformat = 'gif';
55: my $versionstring = `gnuplot --version 2>/dev/null`;
56: ($version) = ($versionstring =~ /^gnuplot ([\d.]+)/);
57: if ($version >= 4) {
58: $weboutputformat = 'png';
59: }
60: $colorprefix = 'x';
61: if ($version >= 4.6) {
62: $colorprefix = '#';
63: }
64: }
65:
66:
67: =pod
68:
69: ##
70: ## Description of data structures:
71: ##
72: ## %plot %key %axis
73: ## --------------------------
74: ## height title color
75: ## width box xmin
76: ## bgcolor pos xmax
77: ## fgcolor ymin
78: ## transparent ymax
79: ## grid
80: ## border
81: ## font
82: ## align
83: ##
84: ## @labels: $labels[$i] = \%label
85: ## %label: text, xpos, ypos, justify, rotate, zlayer
86: ##
87: ## @curves: $curves[$i] = \%curve
88: ## %curve: name, linestyle, ( function | data )
89: ##
90: ## $curves[$i]->{'data'} = [ [x1,x2,x3,x4],
91: ## [y1,y2,y3,y4] ]
92: ##
93:
94: ###################################################################
95: ## ##
96: ## Tests used in checking the validitity of input ##
97: ## ##
98: ###################################################################
99:
100: =cut
101:
102: my $max_str_len = 50; # if a label, title, xlabel, or ylabel text
103: # is longer than this, it will be truncated.
104:
105: my %linetypes = # For png use these linetypes.
106: (
107: solid => 1,
108: dashed => 0
109: );
110: my %ps_linetypes = # For ps the line types are different!
111: (
112: solid => 1,
113: dashed => 7
114: );
115:
116: my %linestyles =
117: (
118: lines => 2, # Maybe this will be used in the future
119: linespoints => 2, # to check on whether or not they have
120: dots => 2, # supplied enough <data></data> fields
121: points => 2, # to use the given line style. But for
122: steps => 2, # now there are more important things
123: fsteps => 2, # for me to deal with.
124: histeps => 2,
125: errorbars => 3,
126: xerrorbars => [3,4],
127: yerrorbars => [3,4],
128: xyerrorbars => [4,6],
129: boxes => 3,
130: filledcurves => 2,
131: vector => 4
132: );
133:
134: my $int_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^\d+$/};
135: my $real_test =
136: sub {$_[0]=~s/\s+//g;$_[0]=~/^[+-]?\d*\.?\d*([eE][+-]\d+)?$/};
137: my $pos_real_test =
138: sub {$_[0]=~s/\s+//g;$_[0]=~/^[+]?\d*\.?\d*([eE][+-]\d+)?$/};
139: my $color_test;
140: if ($version < 4.6) {
141: $color_test = sub {$_[0]=~s/\s+//g;$_[0]=~s/^\#/x/;$_[0]=~s/^x+/x/;$_[0]=~/^x[\da-fA-F]{6}$/};
142: } else {
143: $color_test = sub {$_[0]=~s/\s+//g;$_[0]=~s/^x/#/;$_[0]=~s/^\#+/#/;$_[0]=~/^\#[\da-fA-F]{6}$/};
144: }
145: my $onoff_test = sub {$_[0]=~/^(on|off)$/};
146: my $key_pos_test = sub {$_[0]=~/^(top|bottom|right|left|outside|below| )+$/};
147: my $sml_test = sub {$_[0]=~/^(\d+|small|medium|large)$/};
148: my $linestyle_test = sub {exists($linestyles{$_[0]})};
149: my $words_test = sub {$_[0]=~s/\s+/ /g;$_[0]=~/^([\w~!\@\#\$\%^&\*\(\)-=_\+\[\]\{\}:\;\'<>,\.\/\?\\]+ ?)+$/};
150:
151: my $arrowhead_test = sub{$_[0]=~/^(nohead|head|heads| )+$/};
152: my $arrowstyle_test= sub{$_[0]=~/^(filled|empty|nofilled)+$/};
153: my $degree_test = sub{&$pos_real_test($_[0]) && ($_[0] <= 360.0)};
154:
155: ###################################################################
156: ## ##
157: ## Attribute metadata ##
158: ## ##
159: ###################################################################
160: my @gnuplot_edit_order =
161: qw/alttag bgcolor fgcolor height width texwidth fontface font texfont
162: transparent grid samples
163: border align plotcolor plottype gridtype lmargin rmargin
164: tmargin bmargin major_ticscale minor_ticscale boxwidth gridlayer fillstyle
165: pattern solid/;
166:
167: my $margin_choices = ['default',0..20];
168:
169: my %gnuplot_defaults =
170: (
171: alttag => {
172: default => 'dynamically generated plot',
173: test => $words_test,
174: description => 'Brief description of the plot',
175: edit_type => 'entry',
176: size => '40'
177: },
178: height => {
179: default => 300,
180: test => $int_test,
181: description => 'Height of image (pixels)',
182: edit_type => 'entry',
183: size => '10'
184: },
185: width => {
186: default => 400,
187: test => $int_test,
188: description => 'Width of image (pixels)',
189: edit_type => 'entry',
190: size => '10'
191: },
192: bgcolor => {
193: default => $colorprefix.'ffffff',
194: test => $color_test,
195: description => 'Background color of image ('.$colorprefix.'ffffff)',
196: edit_type => 'entry',
197: size => '10',
198: class => 'colorchooser'
199: },
200: fgcolor => {
201: default => $colorprefix.'000000',
202: test => $color_test,
203: description => 'Foreground color of image ('.$colorprefix.'000000)',
204: edit_type => 'entry',
205: size => '10',
206: class => 'colorchooser'
207: },
208: transparent => {
209: default => 'off',
210: test => $onoff_test,
211: description => 'Transparent image',
212: edit_type => 'onoff'
213: },
214: grid => {
215: default => 'on',
216: test => $onoff_test,
217: description => 'Display grid',
218: edit_type => 'onoff'
219: },
220: gridlayer => {
221: default => 'off',
222: test => $onoff_test,
223: description => 'Display grid front layer over filled boxes or filled curves',
224: edit_type => 'onoff'
225: },
226: box_border => {
227: default => 'noborder',
228: test => sub {$_[0]=~/^(noborder|border)$/},
229: description => 'Draw border for boxes',
230: edit_type => 'choice',
231: choices => ['border','noborder']
232: },
233: border => {
234: default => 'on',
235: test => $onoff_test,
236: description => 'Draw border around plot',
237: edit_type => 'onoff'
238: },
239: font => {
240: default => '9',
241: test => $sml_test,
242: description => 'Font size to use in web output (pts)',
243: edit_type => 'choice',
244: choices => [['5','5 (small)'],'6','7','8',['9','9 (medium)'],'10',['11','11 (large)'],'12','15']
245: },
246: fontface => {
247: default => 'sans-serif',
248: test => sub {$_[0]=~/^(sans-serif|serif|classic)$/},
249: description => 'Type of font to use',
250: edit_type => 'choice',
251: choices => ['sans-serif','serif', 'classic']
252: },
253: samples => {
254: default => '100',
255: test => $int_test,
256: description => 'Number of samples for non-data plots',
257: edit_type => 'choice',
258: choices => ['100','200','500','1000','2000','5000']
259: },
260: align => {
261: default => 'middle',
262: test => sub {$_[0]=~/^(left|right|middle|center)$/},
263: description => 'Alignment for image in HTML',
264: edit_type => 'choice',
265: choices => ['left','right','middle','center']
266: },
267: texwidth => {
268: default => '93',
269: test => $int_test,
270: description => 'Width of plot when printed (mm)',
271: edit_type => 'entry',
272: size => '5'
273: },
274: texfont => {
275: default => '22',
276: test => $int_test,
277: description => 'Font size to use in TeX output (pts):',
278: edit_type => 'choice',
279: choices => [qw/8 10 12 14 16 18 20 22 24 26 28 30 32 34 36/],
280: },
281: plotcolor => {
282: default => 'monochrome',
283: test => sub {$_[0]=~/^(monochrome|color|colour)$/},
284: description => 'Color setting for printing:',
285: edit_type => 'choice',
286: choices => [qw/monochrome color colour/],
287: },
288: pattern => {
289: default => '',
290: test => $int_test,
291: description => 'Pattern value for boxes:',
292: edit_type => 'choice',
293: choices => [0,1,2,3,4,5,6]
294: },
295: solid => {
296: default => 0,
297: test => $real_test,
298: description => 'The density of fill style for boxes',
299: edit_type => 'entry',
300: size => '5'
301: },
302: fillstyle => {
303: default => 'empty',
304: test => sub {$_[0]=~/^(empty|solid|pattern)$/},
305: description => 'Filled style for boxes:',
306: edit_type => 'choice',
307: choices => ['empty','solid','pattern']
308: },
309: plottype => {
310: default => 'Cartesian',
311: test => sub {$_[0]=~/^(Polar|Cartesian)$/},
312: description => 'Plot type:',
313: edit_type => 'choice',
314: choices => ['Cartesian','Polar']
315: },
316: gridtype => {
317: default => 'Cartesian',
318: test => sub {$_[0]=~/^(Polar|Cartesian|Linear-Log|Log-Linear|Log-Log)$/},
319: description => 'Grid type:',
320: edit_type => 'choice',
321: choices => ['Cartesian','Polar','Linear-Log','Log-Linear','Log-Log']
322: },
323: lmargin => {
324: default => 'default',
325: test => sub {$_[0]=~/^(default|\d+)$/},
326: description => 'Left margin width (pts):',
327: edit_type => 'choice',
328: choices => $margin_choices,
329: },
330: rmargin => {
331: default => 'default',
332: test => sub {$_[0]=~/^(default|\d+)$/},
333: description => 'Right margin width (pts):',
334: edit_type => 'choice',
335: choices => $margin_choices,
336: },
337: tmargin => {
338: default => 'default',
339: test => sub {$_[0]=~/^(default|\d+)$/},
340: description => 'Top margin width (pts):',
341: edit_type => 'choice',
342: choices => $margin_choices,
343: },
344: bmargin => {
345: default => 'default',
346: test => sub {$_[0]=~/^(default|\d+)$/},
347: description => 'Bottom margin width (pts):',
348: edit_type => 'choice',
349: choices => $margin_choices,
350: },
351: boxwidth => {
352: default => '',
353: test => $real_test,
354: description => 'Width of boxes, default is auto',
355: edit_type => 'entry',
356: size => '5'
357: },
358: major_ticscale => {
359: default => '1',
360: test => $real_test,
361: description => 'Size of major tic marks (plot coordinates)',
362: edit_type => 'entry',
363: size => '5'
364: },
365: minor_ticscale => {
366: default => '0.5',
367: test => $real_test,
368: description => 'Size of minor tic mark (plot coordinates)',
369: edit_type => 'entry',
370: size => '5'
371: },
372: );
373:
374:
375: my %key_defaults =
376: (
377: title => {
378: default => '',
379: test => $words_test,
380: description => 'Title of key',
381: edit_type => 'entry',
382: size => '40'
383: },
384: box => {
385: default => 'off',
386: test => $onoff_test,
387: description => 'Draw a box around the key?',
388: edit_type => 'onoff'
389: },
390: pos => {
391: default => 'top right',
392: test => $key_pos_test,
393: description => 'Position of the key on the plot',
394: edit_type => 'choice',
395: choices => ['top left','top right','bottom left','bottom right',
396: 'outside','below']
397: }
398: );
399:
400: my %label_defaults =
401: (
402: xpos => {
403: default => 0,
404: test => $real_test,
405: description => 'X position of label (graph coordinates)',
406: edit_type => 'entry',
407: size => '10'
408: },
409: ypos => {
410: default => 0,
411: test => $real_test,
412: description => 'Y position of label (graph coordinates)',
413: edit_type => 'entry',
414: size => '10'
415: },
416: justify => {
417: default => 'left',
418: test => sub {$_[0]=~/^(left|right|center)$/},
419: description => 'justification of the label text on the plot',
420: edit_type => 'choice',
421: choices => ['left','right','center']
422: },
423: rotate => {
424: default => 0,
425: test => $real_test,
426: description => 'Rotation of label (degrees)',
427: edit_type => 'entry',
428: size => '10',
429: },
430: zlayer => {
431: default => '',
432: test => sub {$_[0]=~/^(front|back)$/},
433: description => 'Z position of label',
434: edit_type => 'choice',
435: choices => ['front','back'],
436: },
437: );
438:
439: my @tic_edit_order = ('location','mirror','start','increment','end',
440: 'minorfreq');
441: my %tic_defaults =
442: (
443: location => {
444: default => 'border',
445: test => sub {$_[0]=~/^(border|axis)$/},
446: description => 'Location of major tic marks',
447: edit_type => 'choice',
448: choices => ['border','axis']
449: },
450: mirror => {
451: default => 'on',
452: test => $onoff_test,
453: description => 'Mirror tics on opposite axis?',
454: edit_type => 'onoff'
455: },
456: start => {
457: default => '-10.0',
458: test => $real_test,
459: description => 'Start major tics at',
460: edit_type => 'entry',
461: size => '10'
462: },
463: increment => {
464: default => '1.0',
465: test => $real_test,
466: description => 'Place a major tic every',
467: edit_type => 'entry',
468: size => '10'
469: },
470: end => {
471: default => ' 10.0',
472: test => $real_test,
473: description => 'Stop major tics at ',
474: edit_type => 'entry',
475: size => '10'
476: },
477: minorfreq => {
478: default => '0',
479: test => $int_test,
480: description => 'Number of minor tics per major tic mark',
481: edit_type => 'entry',
482: size => '10'
483: },
484: rotate => {
485: default => 'off',
486: test => $onoff_test,
487: description => 'Rotate tic label by 90 degrees if on',
488: edit_type => 'onoff'
489: }
490: );
491:
492: my @axis_edit_order = ('color','xmin','xmax','ymin','ymax','xformat', 'yformat', 'xzero', 'yzero');
493: my %axis_defaults =
494: (
495: color => {
496: default => $colorprefix.'000000',
497: test => $color_test,
498: description => 'Color of grid lines ('.$colorprefix.'000000)',
499: edit_type => 'entry',
500: size => '10',
501: class => 'colorchooser'
502: },
503: xmin => {
504: default => '-10.0',
505: test => $real_test,
506: description => 'Minimum x-value shown in plot',
507: edit_type => 'entry',
508: size => '10'
509: },
510: xmax => {
511: default => ' 10.0',
512: test => $real_test,
513: description => 'Maximum x-value shown in plot',
514: edit_type => 'entry',
515: size => '10'
516: },
517: ymin => {
518: default => '-10.0',
519: test => $real_test,
520: description => 'Minimum y-value shown in plot',
521: edit_type => 'entry',
522: size => '10'
523: },
524: ymax => {
525: default => ' 10.0',
526: test => $real_test,
527: description => 'Maximum y-value shown in plot',
528: edit_type => 'entry',
529: size => '10'
530: },
531: xformat => {
532: default => 'on',
533: test => sub {$_[0]=~/^(on|off|\d+(f|F|e|E|P(|\s*[Pp][Ii])))$/},
534: description => 'X-axis number formatting',
535: edit_type => 'choice',
536: choices => ['on', 'off', '2e', '2f'],
537: },
538: yformat => {
539: default => 'on',
540: test => sub {$_[0]=~/^(on|off|\d+(f|F|e|E|P(|\s*[Pp][Ii])))$/},
541: description => 'Y-axis number formatting',
542: edit_type => 'choice',
543: choices => ['on', 'off', '2e', '2f'],
544: },
545:
546: xzero => {
547: default => 'off',
548: test => sub {$_[0]=~/^(off|line|thick-line|dotted)$/},
549: description => 'Show x-zero (y=0) axis',
550: edit_type => 'choice',
551: choices => ['off', 'line', 'thick-line', 'dotted'],
552: },
553:
554: yzero => {
555: default => 'off',
556: test => sub {$_[0]=~/^(off|line|thick-line|dotted)$/},
557: description => 'Show y-zero (x=0) axis',
558: edit_type => 'choice',
559: choices => ['off', 'line', 'thick-line', 'dotted'],
560: },
561: );
562:
563:
564: my @curve_edit_order = ('color','name','linestyle','linewidth','linetype',
565: 'pointtype','pointsize','limit', 'arrowhead', 'arrowstyle',
566: 'arrowlength', 'arrowangle', 'arrowbackangle'
567: );
568:
569: my %curve_defaults =
570: (
571: color => {
572: default => $colorprefix.'000000',
573: test => $color_test,
574: description => 'Color of curve ('.$colorprefix.'000000)',
575: edit_type => 'entry',
576: size => '10',
577: class => 'colorchooser'
578: },
579: name => {
580: default => '',
581: test => $words_test,
582: description => 'Name of curve to appear in key',
583: edit_type => 'entry',
584: size => '20'
585: },
586: linestyle => {
587: default => 'lines',
588: test => $linestyle_test,
589: description => 'Plot with:',
590: edit_type => 'choice',
591: choices => [keys(%linestyles)]
592: },
593: linewidth => {
594: default => 1,
595: test => $int_test,
596: description => 'Line width (may not apply to all plot styles)',
597: edit_type => 'choice',
598: choices => [1,2,3,4,5,6,7,8,9,10]
599: },
600: linetype => {
601: default => 'solid',
602: test => sub {$_[0]=~/^(solid|dashed)$/},
603: description => 'Line type (may not apply to all plot styles)',
604: edit_type => 'choice',
605: choices => ['solid', 'dashed']
606: },
607: pointsize => {
608: default => 1,
609: test => $pos_real_test,
610: description => 'Point size (may not apply to all plot styles)',
611: edit_type => 'entry',
612: size => '5'
613: },
614: pointtype => {
615: default => 1,
616: test => $int_test,
617: description => 'Point type (may not apply to all plot styles)',
618: edit_type => 'choice',
619: choices => [0,1,2,3,4,5,6]
620: },
621: limit => {
622: default => 'closed',
623: test => sub {$_[0]=~/^(above|below|closed|x1|x2|y1|y2)$/},
624: description => 'Point to fill -- for filledcurves',
625: edit_type => 'choice',
626: choices => ['above', 'below', 'closed','x1','x2','y1','y2']
627: },
628: arrowhead => {
629: default => 'head',
630: test => $arrowhead_test,
631: description => 'Vector arrow head type',
632: edit_type => 'choice',
633: choices => ['nohead', 'head', 'heads']
634: },
635: arrowstyle => {
636: default => 'filled',
637: test => $arrowstyle_test,
638: description => 'Vector arrow head style',
639: edit_type => 'choice',
640: choices => ['filled', 'empty', 'nofilled']
641: },
642: arrowlength => {
643: default => 0.02,
644: test => $pos_real_test,
645: description => "Length of vector arrow (only applies to vector plots)",
646: edit_type => 'entry',
647: size => '5'
648: },
649: arrowangle => {
650: default => 10.0,
651: test => $degree_test,
652: description => 'Angle of arrow branches to arrow body (only applies to vector plots)',
653: edit_type => 'entry',
654: size => '5'
655: },
656:
657: arrowbackangle => {
658: default => 90.0,
659: test => $degree_test,
660: descripton => 'Angle of arrow back lines to branches.',
661: edit_type => 'entry',
662: size => '5'
663: }
664:
665: );
666:
667: ###################################################################
668: ## ##
669: ## parsing and edit rendering ##
670: ## ##
671: ###################################################################
672:
673: undef %Apache::lonplot::plot;
674: my (%key,%axis,$title,$xlabel,$ylabel,@labels,@curves,%xtics,%ytics);
675:
676: my $current_tics; # Reference to the current tick hash
677:
678: sub start_gnuplot {
679: undef(%Apache::lonplot::plot); undef(%key); undef(%axis);
680: undef($title); undef($xlabel); undef($ylabel);
681: undef(@labels); undef(@curves);
682: undef(%xtics); undef(%ytics);
683: #
684: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
685: my $result='';
686:
687: &Apache::lonxml::register('Apache::lonplot',
688: ('title','xlabel','ylabel','key','axis','label','curve',
689: 'xtics','ytics'));
690: push (@Apache::lonxml::namespace,'lonplot');
691: if ($target eq 'web' || $target eq 'tex') {
692: &get_attributes(\%Apache::lonplot::plot,\%gnuplot_defaults,$parstack,$safeeval,
693: $tagstack->[-1]);
694: } elsif ($target eq 'edit') {
695: &fixup_colors($token,['bgcolor','fgcolor']);
696: $result .= &Apache::edit::tag_start($target,$token,'GnuPlot');
697: $result .= &edit_attributes($target,$token,\%gnuplot_defaults,
698: \@gnuplot_edit_order)
699: .&Apache::edit::end_row()
700: .&Apache::edit::start_spanning_row();
701: } elsif ($target eq 'modified') {
702: my $constructtag=&Apache::edit::get_new_args
703: ($token,$parstack,$safeeval,keys(%gnuplot_defaults));
704: my $fixed = &fixup_colors($token,['bgcolor','fgcolor']);
705: if ($constructtag || $fixed) {
706: $result = &Apache::edit::rebuild_tag($token);
707: }
708: }
709: return $result;
710: }
711:
712: sub end_gnuplot {
713: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
714: pop @Apache::lonxml::namespace;
715: &Apache::lonxml::deregister('Apache::lonplot',
716: ('title','xlabel','ylabel','key','axis','label','curve'));
717: my $result = '';
718: my $randnumber;
719: my $tmpdir =LONCAPA::tempdir(); # Where temporary files live:
720:
721: # need to call rand everytime start_script would evaluate, as the
722: # safe space rand number generator and the global rand generator
723: # are not separate
724: if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
725: $target eq 'answer') {
726: $randnumber=int(rand(1000));
727: }
728: if ($target eq 'web' || $target eq 'tex') {
729: &check_inputs(); # Make sure we have all the data we need
730: ##
731: ## Determine filename
732: my ($seconds, $microseconds) = gettimeofday;
733: my $filename = $env{'user.name'}.'_'.$env{'user.domain'}.
734: '_'.$seconds.'_'.$microseconds.'_'.$$.$randnumber.'_plot';
735: ## Write the plot description to the file
736: &write_gnuplot_file($tmpdir,$filename,$target);
737: $filename = &escape($filename);
738: ## return image tag for the plot
739: if ($target eq 'web') {
740: my $srcatt = "src=\"/cgi-bin/plot.$weboutputformat?file=$filename.data\"";
741: my $widthatt = "width=\"$Apache::lonplot::plot{'width'}\"";
742: my $heightatt = "height=\"$Apache::lonplot::plot{'height'}\"";
743: my $alignatt = "align=\"$Apache::lonplot::plot{'align'}\"";
744: my $altatt = "alt=\"$Apache::lonplot::plot{'alttag'}\"";
745: if ($Apache::lonplot::plot{'align'} eq 'center') {
746: $result .= '<div style="text-align:center">'.
747: "<img $srcatt $widthatt $heightatt $altatt>".
748: "</div>\n";
749:
750: } else {
751: $result .= "<img $srcatt $widthatt $heightatt $alignatt $altatt>";
752: }
753: } elsif ($target eq 'tex') {
754: &Apache::lonxml::debug(" gnuplot wid = $Apache::lonplot::plot{'width'}");
755: &Apache::lonxml::debug(" gnuplot ht = $Apache::lonplot::plot{'height'}");
756: #might be inside the safe space, register the URL for later
757: &Apache::lonxml::register_ssi("/cgi-bin/plot.gif?file=$filename.data&output=eps");
758: $result = "%DYNAMICIMAGE:$Apache::lonplot::plot{'width'}:$Apache::lonplot::plot{'height'}:$Apache::lonplot::plot{'texwidth'}\n";
759: $result .= '\graphicspath{{'.$tmpdir.'}}'."\n";
760: if ($Apache::lonplot::plot{'align'} eq 'center') {
761: $result .= '\begin{center}';
762: }
763: $result .= '\includegraphics[width='.$Apache::lonplot::plot{'texwidth'}.' mm]{'.&unescape($filename).'.eps}';
764: if ($Apache::lonplot::plot{'align'} eq 'center') {
765: $result .= '\end{center}';
766: }
767: }
768: } elsif ($target eq 'edit') {
769: $result.=&Apache::edit::tag_end($target,$token);
770: }
771: return $result;
772: }
773:
774:
775: ##--------------------------------------------------------------- xtics
776: sub start_xtics {
777: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
778: my $result='';
779: if ($target eq 'web' || $target eq 'tex') {
780: &get_attributes(\%xtics,\%tic_defaults,$parstack,$safeeval,
781: $tagstack->[-1]);
782: $current_tics = \%xtics;
783: &Apache::lonxml::register('Apache::lonplot', 'tic');
784: } elsif ($target eq 'edit') {
785: $result .= &Apache::edit::tag_start($target,$token,'xtics');
786: $result .= &edit_attributes($target,$token,\%tic_defaults,
787: \@tic_edit_order);
788: } elsif ($target eq 'modified') {
789: my $constructtag=&Apache::edit::get_new_args
790: ($token,$parstack,$safeeval,keys(%tic_defaults));
791: if ($constructtag) {
792: $result = &Apache::edit::rebuild_tag($token);
793: }
794: }
795: return $result;
796: }
797:
798: sub end_xtics {
799: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
800: my $result = '';
801: if ($target eq 'web' || $target eq 'tex') {
802: &Apache::lonxml::deregister('Apache::lonplot', 'tic');
803: } elsif ($target eq 'edit') {
804: $result.=&Apache::edit::tag_end($target,$token);
805: }
806: return $result;
807: }
808:
809: ##--------------------------------------------------------------- ytics
810: sub start_ytics {
811: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
812: my $result='';
813: if ($target eq 'web' || $target eq 'tex') {
814: &get_attributes(\%ytics,\%tic_defaults,$parstack,$safeeval,
815: $tagstack->[-1]);
816: $current_tics = \%ytics;
817: &Apache::lonxml::register('Apache::lonplot', 'tic');
818: } elsif ($target eq 'edit') {
819: $result .= &Apache::edit::tag_start($target,$token,'ytics');
820: $result .= &edit_attributes($target,$token,\%tic_defaults,
821: \@tic_edit_order);
822: } elsif ($target eq 'modified') {
823: my $constructtag=&Apache::edit::get_new_args
824: ($token,$parstack,$safeeval,keys(%tic_defaults));
825: if ($constructtag) {
826: $result = &Apache::edit::rebuild_tag($token);
827: }
828: }
829: return $result;
830: }
831:
832: sub end_ytics {
833: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
834: my $result = '';
835: if ($target eq 'web' || $target eq 'tex') {
836: &Apache::lonxml::deregister('Apache::lonplot', 'tic');
837: } elsif ($target eq 'edit') {
838: $result.=&Apache::edit::tag_end($target,$token);
839: }
840: return $result;
841: }
842:
843:
844: ##----------------------------------------------------------------
845: #
846: # Tic handling:
847: # The <tic> tag allows users to specify exact Tic positions and labels
848: # for each axis. In this version we only support level 0 tics (major tic).
849: # Each tic has associated with it a position and a label
850: # $current_tics is a reference to the current tick description hash.
851: # We add elements to an array in that has: ticspecs whose elements
852: # are 'pos' - the tick position and 'label' - the tic label.
853: #
854:
855:
856: sub start_tic {
857: my ($target, $token, $tagstack, $parstack, $parser, $safeeval, $style) = @_;
858:
859: my $result = '';
860: if ($target eq 'web' || $target eq 'tex') {
861: my $tic_location = &Apache::lonxml::get_param('location', $parstack, $safeeval);
862: my $tic_label = &Apache::lonxml::get_all_text('/tic', $parser);
863:
864: # Tic location must e a real:
865:
866: if (!&$real_test($tic_location)) {
867: &Apache::lonxml::warning("Tic location: $tic_location must be a real number");
868: } else {
869:
870: if (!defined $current_tics->{'ticspecs'}) {
871: $current_tics->{'ticspecs'} = [];
872: }
873: my $ticspecs = $current_tics->{'ticspecs'};
874: push (@$ticspecs, {'pos' => $tic_location, 'label' => $tic_label});
875: }
876: }
877:
878: return $result;
879: }
880:
881: sub end_tic {
882: return '';
883: }
884:
885: ##-----------------------------------------------------------------font
886: my %font_properties =
887: (
888: 'classic' => {
889: face => 'classic',
890: file => 'DejaVuSansMono-Bold',
891: printname => 'Helvetica',
892: tex_no_file => 1,
893: },
894: 'sans-serif' => {
895: face => 'sans-serif',
896: file => 'DejaVuSans',
897: printname => 'DejaVuSans',
898: },
899: 'serif' => {
900: face => 'serif',
901: file => 'DejaVuSerif',
902: printname => 'DejaVuSerif',
903: },
904: );
905:
906: sub get_font {
907: my ($target) = @_;
908: my ($size, $selected_font);
909:
910: if ( $Apache::lonplot::plot{'font'} =~ /^(small|medium|large)/) {
911: $selected_font = $font_properties{'classic'};
912: if ( $Apache::lonplot::plot{'font'} eq 'small') {
913: $size = '5';
914: } elsif ( $Apache::lonplot::plot{'font'} eq 'medium') {
915: $size = '9';
916: } elsif ( $Apache::lonplot::plot{'font'} eq 'large') {
917: $size = '11';
918: } else {
919: $size = '9';
920: }
921: } else {
922: $size = $Apache::lonplot::plot{'font'};
923: $selected_font = $font_properties{$Apache::lonplot::plot{'fontface'}};
924: }
925: if ($target eq 'tex' && defined($Apache::lonplot::plot{'texfont'})) {
926: # $selected_font = $font_properties{'classic'};
927: $size = $Apache::lonplot::plot{'texfont'};
928: }
929: return ($size, $selected_font);
930: }
931:
932: ##----------------------------------------------------------------- key
933: sub start_key {
934: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
935: my $result='';
936: if ($target eq 'web' || $target eq 'tex') {
937: &get_attributes(\%key,\%key_defaults,$parstack,$safeeval,
938: $tagstack->[-1]);
939: } elsif ($target eq 'edit') {
940: $result .= &Apache::edit::tag_start($target,$token,'Plot Key');
941: $result .= &edit_attributes($target,$token,\%key_defaults);
942: } elsif ($target eq 'modified') {
943: my $constructtag=&Apache::edit::get_new_args
944: ($token,$parstack,$safeeval,keys(%key_defaults));
945: if ($constructtag) {
946: $result = &Apache::edit::rebuild_tag($token);
947: }
948: }
949: return $result;
950: }
951:
952: sub end_key {
953: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
954: my $result = '';
955: if ($target eq 'web' || $target eq 'tex') {
956: } elsif ($target eq 'edit') {
957: $result.=&Apache::edit::tag_end($target,$token);
958: }
959: return $result;
960: }
961:
962: sub parse_label {
963: my ($target,$text) = @_;
964: my $parser=HTML::LCParser->new(\$text);
965: my $result;
966: while (my $token=$parser->get_token) {
967: if ($token->[0] eq 'S') {
968: if ($token->[1] eq 'sub') {
969: $result .= '_{';
970: } elsif ($token->[1] eq 'sup') {
971: $result .= '^{';
972: } else {
973: $result .= $token->[4];
974: }
975: } elsif ($token->[0] eq 'E') {
976: if ($token->[1] eq 'sub'
977: || $token->[1] eq 'sup') {
978: $result .= '}';
979: } else {
980: $result .= $token->[2];
981: }
982: } elsif ($token->[0] eq 'T') {
983: $result .= &replace_entities($target,$token->[1]);
984: }
985: }
986: return $result;
987: }
988:
989: #
990: # Note that there are severe restrictions on font selection in the
991: # ps driver now. later in life Gnuplot is supposed to support
992: # utf-8 fonts in the posts script driver. When this happens,
993: # the tex entries with comments that include the word <FIX>
994: # should be changed to print the correct glyphs rather than some
995: # approximation or fallback of what is intended.
996:
997: my %lookup =
998: ( # Greek alphabet:
999:
1000: '(Alpha|#913)' => {'tex' => '{/Symbol A}', 'web' => "\x{391}"},
1001: '(Beta|#914)' => {'tex' => '{/Symbol B}', 'web' => "\x{392}"},
1002: '(Chi|#935)' => {'tex' => '{/Symbol C}', 'web' => "\x{3A7}"},
1003: '(Delta|#916)' => {'tex' => '{/Symbol D}', 'web' => "\x{394}"},
1004: '(Epsilon|#917)' => {'tex' => '{/Symbol E}', 'web' => "\x{395}"},
1005: '(Phi|#934)' => {'tex' => '{/Symbol F}', 'web' => "\x{3A6}"},
1006: '(Gamma|#915)' => {'tex' => '{/Symbol G}', 'web' => "\x{393}"},
1007: '(Eta|#919)' => {'tex' => '{/Symbol H}', 'web' => "\x{397}"},
1008: '(Iota|#921)' => {'tex' => '{/Symbol I}', 'web' => "\x{399}"},
1009: '(Kappa|#922)' => {'tex' => '{/Symbol K}', 'web' => "\x{39A}"},
1010: '(Lambda|#923)' => {'tex' => '{/Symbol L}', 'web' => "\x{39B}"},
1011: '(Mu|#924)' => {'tex' => '{/Symbol M}', 'web' => "\x{39C}"},
1012: '(Nu|#925)' => {'tex' => '{/Symbol N}', 'web' => "\x{39D}"},
1013: '(Omicron|#927)' => {'tex' => '{/Symbol O}', 'web' => "\x{39F}"},
1014: '(Pi|#928)' => {'tex' => '{/Symbol P}', 'web' => "\x{3A0}"},
1015: '(Theta|#920)' => {'tex' => '{/Symbol Q}', 'web' => "\x{398}"},
1016: '(Rho|#929)' => {'tex' => '{/Symbol R}', 'web' => "\x{3A1}"},
1017: '(Sigma|#931)' => {'tex' => '{/Symbol S}', 'web' => "\x{3A3}"},
1018: '(Tau|#932)' => {'tex' => '{/Symbol T}', 'web' => "\x{3A4}"},
1019: '(Upsilon|#933)' => {'tex' => '{/Symbol U}', 'web' => "\x{3A5}"},
1020: '(Omega|#937)' => {'tex' => '{/Symbol W}', 'web' => "\x{3A9}"},
1021: '(Xi|#926)' => {'tex' => '{/Symbol X}', 'web' => "\x{39E}"},
1022: '(Psi|#936)' => {'tex' => '{/Symbol Y}', 'web' => "\x{3A8}"},
1023: '(Zeta|#918)' => {'tex' => '{/Symbol Z}', 'web' => "\x{396}"},
1024: '(alpha|#945)' => {'tex' => '{/Symbol a}', 'web' => "\x{3B1}"},
1025: '(beta|#946)' => {'tex' => '{/Symbol b}', 'web' => "\x{3B2}"},
1026: '(chi|#967)' => {'tex' => '{/Symbol c}', 'web' => "\x{3C7}"},
1027: '(delta|#948)' => {'tex' => '{/Symbol d}', 'web' => "\x{3B4}"},
1028: '(epsilon|#949)' => {'tex' => '{/Symbol e}', 'web' => "\x{3B5}"},
1029: '(phi|#966)' => {'tex' => '{/Symbol f}', 'web' => "\x{3C6}"},
1030: '(gamma|#947)' => {'tex' => '{/Symbol g}', 'web' => "\x{3B3}"},
1031: '(eta|#951)' => {'tex' => '{/Symbol h}', 'web' => "\x{3B7}"},
1032: '(iota|#953)' => {'tex' => '{/Symbol i}', 'web' => "\x{3B9}"},
1033: '(kappa|#954)' => {'tex' => '{/Symbol k}', 'web' => "\x{3BA}"},
1034: '(lambda|#955)' => {'tex' => '{/Symbol k}', 'web' => "\x{3BB}"},
1035: '(mu|#956)' => {'tex' => '{/Symbol m}', 'web' => "\x{3BC}"},
1036: '(nu|#957)' => {'tex' => '{/Symbol n}', 'web' => "\x{3BD}"},
1037: '(omicron|#959)' => {'tex' => '{/Symbol o}', 'web' => "\x{3BF}"},
1038: '(pi|#960)' => {'tex' => '{/Symbol p}', 'web' => "\x{3C0}"},
1039: '(theta|#952)' => {'tex' => '{/Symbol q}', 'web' => "\x{3B8}"},
1040: '(rho|#961)' => {'tex' => '{/Symbol r}', 'web' => "\x{3C1}"},
1041: '(sigma|#963)' => {'tex' => '{/Symbol s}', 'web' => "\x{3C3}"},
1042: '(tau|#964)' => {'tex' => '{/Symbol t}', 'web' => "\x{3C4}"},
1043: '(upsilon|#965)' => {'tex' => '{/Symbol u}', 'web' => "\x{3C5}"},
1044: '(omega|#969)' => {'tex' => '{/Symbol w}', 'web' => "\x{3C9}"},
1045: '(xi|#958)' => {'tex' => '{/Symbol x}', 'web' => "\x{3BE}"},
1046: '(psi|#968)' => {'tex' => '{/Symbol y}', 'web' => "\x{3C8}"},
1047: '(zeta|#950)' => {'tex' => '{/Symbol z}', 'web' => "\x{3B6}"},
1048: '(thetasym|#977)' => {'tex' => '{/Symbol \165}', 'web' => "\x{3d1}"},
1049: '(upsih|#978)' => {'tex' => '{/Symbol \241}', 'web' => "\x{3d2}"},
1050: '(piv|#982)' => {'tex' => '{/Symbol \166}', 'web' => "\x{3d6}"},
1051:
1052:
1053: # Punctuation:
1054:
1055: '(quot|#034)' => {'tex' => '\42', 'web' => '\42'},
1056: '(amp|#038)' => {'tex' => '\46', 'web' => '\46'},
1057: '(lt|#060)' => {'tex' => '\74', 'web' => '\74'},
1058: '(gt|#062)' => {'tex' => '\76', 'web' => '\76'},
1059: '#131' => {'tex' => '{/Symbol \246}', 'web' => "\x{192}"},
1060: '#132' => {'tex' => '{/Text \271}', 'web' => "\x{201e}"},
1061: '#133' => {'tex' => '{/Symbol \274}', 'web'=> "\x{2026}"},
1062: '#134' => {'tex' => '{/Text \262}', 'web' => "\x{2020}"},
1063: '#135' => {'tex' => '{/Text \263}', 'web' => "\x{2021}"},
1064: '#136' => {'tex' => '\\\\^', 'web' => '\\\\^'},
1065: '#137' => {'tex' => '%o', 'web' => "\x{2030}"}, # Per Mille <FIX>
1066: '#138' => {'tex' => 'S', 'web' => "\x{160}"}, # S-Caron <FIX>
1067: '#139' => {'tex' => '<', 'web' => '<'},
1068: '#140' => {'tex' => 'AE', 'web' => "\x{152}"}, # AE ligature <FIX>
1069: '#145' => {'tex' => '\140', 'web' => "\x{2018}"},
1070: '#146' => {'tex' => '\47', 'web' => "\x{2019}"},
1071: '#147' => {'tex' => '\140\140', 'web' => "\x{201c}"}, # Left " <FIX>
1072: '#148' => {'tex' => '\47\47', 'web' => '\\"'}, # Right " <FIX>
1073: '#149' => {'tex' => '{/Symbol \267}', 'web' => "\x{2022}"},
1074: '#150' => {'tex' => '{/Text \55}', 'web' => "\x{2013}"}, # en dash
1075: '#151' => {'tex' => '{/Symbol \55}', 'web' => "\x{2014}"}, # em dash
1076: '#152' => {'tex' => '\\\\~', 'web' => '\\\\~'},
1077: '#153' => {'tex' => '{/Symbol \324}', 'web' => "\x{2122}"}, # trademark
1078:
1079: # Accented letters, and other furreign language glyphs.
1080:
1081: '#154' => {'tex' => 's', 'web' => "\x{161}"}, # small s-caron no ps.
1082: '#155' => {'tex' => '>', 'web' => '\76'}, # >
1083: '#156' => {'tex' => '{/Text \366}', 'web' => "\x{153}"}, # oe ligature.<FIX>
1084: '#159', => {'tex' => 'Y', 'web' => "\x{178}"}, # Y-umlaut - can't print <FIX>
1085: '(nbsp|#160)' => {'tex' => ' ', 'web' => ' '}, # non breaking space.
1086: '(iexcl|#161)' => {'tex' => '{/Text \241}', 'web' => "\x{a1}"}, # inverted !
1087: '(cent|#162)' => {'tex' => '{/Text \242}', 'web' => "\x{a2}"}, # Cent currency.
1088: '(pound|#163)' => {'tex' => '{/Text \243}', 'web' => "\x{a3}"}, # GB Pound currency.
1089: '(curren|#164)' => {'tex' => '{/ZapfDingbats \161}','web' => "\x{a4}"}, # Generic currency symb. <FIX>
1090: '(yen|#165)' => {'tex' => '{/Text \245}', 'web' => "\x{a5}"}, # Yen currency.
1091: '(brvbar|#166)' => {'tex' => '{/Symbol \174}', 'web' => "\x{a6}"}, # Broken vert bar no print.
1092: '(sect|#167)' => {'tex' => '{\247}', 'web' => "\x{a7}"}, # Section symbol.
1093: '(uml|#168)' => {'tex' => '{\250}', 'web' => "\x{a8}"}, # 'naked' umlaut.
1094: '(copy|#169)' => {'tex' => '{/Symbol \343}', 'web' => "\x{a9}"}, # Copyright symbol.
1095: '(ordf|#170)' => {'tex' => '{/Text \343}', 'web' => "\x{aa}"}, # Feminine ordinal.
1096: '(laquo|#171)' => {'tex' => '{/Text \253}', 'web' => "\x{ab}"}, # << quotes.
1097: '(not|#172)' => {'tex' => '\254', 'web' => "\x{ac}"}, # Logical not.
1098: '(shy|#173)' => {'tex' => '\255', 'web' => "\x{ad}"}, # soft hyphen.
1099: '(reg|#174)' => {'tex' => '{/Symbol \342}', 'web' => "\x{ae}"}, # Registered tm.
1100: '(macr|#175)' => {'tex' => '^{\255}', 'web' => "\x{af}"}, # 'naked' macron (overbar).
1101: '(deg|#176)' => {'tex' => '{/Text \260}', 'web' => "\x{b0}"}, # Degree symbo..`
1102: '(plusmn|#177)' => {'tex' => '{/Symbol \261}', 'web' => "\x{b1}"}, # +/- symbol.
1103: '(sup2|#178)' => {'tex' => '^2', 'web' => "\x{b2}"}, # Superscript 2.
1104: '(sup3|#179)' => {'tex' => '^3', 'web' => "\x{b3}"}, # Superscript 3.
1105: '(acute|#180)' => {'tex' => '{/Text \222}', 'web' => "\x{b4}"}, # 'naked' acute accent.
1106: '(micro|#181)' => {'tex' => '{/Symbol \155}', 'web' => "\x{b5}"}, # Micro (small mu).
1107: '(para|#182)' => {'tex' => '{/Text \266}', 'web' => "\x{b6}"}, # Paragraph symbol.
1108: '(middot|#183)' => {'tex' => '\267', 'web' => "\x{b7}"}, # middle dot
1109: '(cedil|#184)' => {'tex' => '\233', 'web' => "\x{b8}"}, # 'naked' cedilla.
1110: '(sup1|#185)' => {'tex' => '^1', 'web' => "\x{b9}"}, # superscript 1.
1111: '(ordm|#186)' => {'tex' => '{\260}', 'web' => "\x{ba}"}, # masculine ordinal.
1112: '(raquo|#187)', => {'tex' => '\273', 'web' => "\x{bb}"}, # Right angle quotes.
1113: '(frac14|#188)' => {'tex' => '\274', 'web' => "\x{bc}"}, # 1/4.
1114: '(frac12|#189)' => {'tex' => '\275', 'web' => "\x{bd}"}, # 1/2.
1115: '(frac34|#190)' => {'tex' => '\276', 'web' => "\x{be}"}, # 3/4
1116: '(iquest|#191)' => {'tex' => '{/Text \277}', 'web' => "\x{bf}"}, # Inverted ?
1117: '(Agrave|#192)' => {'tex' => '\300', 'web' => "\x{c0}"}, # A Grave.
1118: '(Aacute|#193)' => {'tex' => '\301', 'web' => "\x{c1}"}, # A Acute.
1119: '(Acirc|#194)' => {'tex' => '\302', 'web' => "\x{c2}"}, # A Circumflex.
1120: '(Atilde|#195)' => {'tex' => '\303', 'web' => "\x{c3}"}, # A tilde.
1121: '(Auml|#196)' => {'tex' => '\304', 'web' => "\x{c4}"}, # A umlaut.
1122: '(Aring|#197)' => {'tex' => '\305', 'web' => "\x{c5}"}, # A ring.
1123: '(AElig|#198)' => {'tex' => '\306', 'web' => "\x{c6}"}, # AE ligature.
1124: '(Ccedil|#199)' => {'tex' => '\307', 'web' => "\x{c7}"}, # C cedilla
1125: '(Egrave|#200)' => {'tex' => '\310', 'web' => "\x{c8}"}, # E Accent grave.
1126: '(Eacute|#201)' => {'tex' => '\311', 'web' => "\x{c9}"}, # E acute accent.
1127: '(Ecirc|#202)' => {'tex' => '\312', 'web' => "\x{ca}"}, # E Circumflex.
1128: '(Euml|#203)' => {'tex' => '\313', 'web' => "\x{cb}"}, # E umlaut.
1129: '(Igrave|#204)' => {'tex' => '\314', 'web' => "\x{cc}"}, # I grave accent.
1130: '(Iacute|#205)' => {'tex' => '\315', 'web' => "\x{cd}"}, # I acute accent.
1131: '(Icirc|#206)' => {'tex' => '\316', 'web' => "\x{ce}"}, # I circumflex.
1132: '(Iuml|#207)' => {'tex' => '\317', 'web' => "\x{cf}"}, # I umlaut.
1133: '(ETH|#208)' => {'tex' => '\320', 'web' => "\x{d0}"}, # Icelandic Cap eth.
1134: '(Ntilde|#209)' => {'tex' => '\321', 'web' => "\x{d1}"}, # Ntilde (enyan).
1135: '(Ograve|#210)' => {'tex' => '\322', 'web' => "\x{d2}"}, # O accent grave.
1136: '(Oacute|#211)' => {'tex' => '\323', 'web' => "\x{d3}"}, # O accent acute.
1137: '(Ocirc|#212)' => {'tex' => '\324', 'web' => "\x{d4}"}, # O circumflex.
1138: '(Otilde|#213)' => {'tex' => '\325', 'web' => "\x{d5}"}, # O tilde.
1139: '(Ouml|#214)' => {'tex' => '\326', 'web' => "\x{d6}"}, # O umlaut.
1140: '(times|#215)' => {'tex' => '\327', 'web' => "\x{d7}"}, # Times symbol.
1141: '(Oslash|#216)' => {'tex' => '\330', 'web' => "\x{d8}"}, # O slash.
1142: '(Ugrave|#217)' => {'tex' => '\331', 'web' => "\x{d9}"}, # U accent grave.
1143: '(Uacute|#218)' => {'tex' => '\332', 'web' => "\x{da}"}, # U accent acute.
1144: '(Ucirc|#219)' => {'tex' => '\333', 'web' => "\x{db}"}, # U circumflex.
1145: '(Uuml|#220)' => {'tex' => '\334', 'web' => "\x{dc}"}, # U umlaut.
1146: '(Yacute|#221)' => {'tex' => '\335', 'web' => "\x{dd}"}, # Y accent acute.
1147: '(THORN|#222)' => {'tex' => '\336', 'web' => "\x{de}"}, # Icelandic thorn.
1148: '(szlig|#223)' => {'tex' => '\337', 'web' => "\x{df}"}, # German sharfes s.
1149: '(agrave|#224)' => {'tex' => '\340', 'web' => "\x{e0}"}, # a accent grave.
1150: '(aacute|#225)' => {'tex' => '\341', 'web' => "\x{e1}"}, # a grave.
1151: '(acirc|#226)' => {'tex' => '\342', 'web' => "\x{e2}"}, # a circumflex.
1152: '(atilde|#227)' => {'tex' => '\343', 'web' => "\x{e3}"}, # a tilde.
1153: '(auml|#228)' => {'tex' => '\344', 'web' => "\x{e4}"}, # a umlaut
1154: '(aring|#229)' => {'tex' => '\345', 'web' => "\x{e5}"}, # a ring on top.
1155: '(aelig|#230)' => {'tex' => '\346', 'web' => "\x{e6}"}, # ae ligature.
1156: '(ccedil|#231)' => {'tex' => '\347', 'web' => "\x{e7}"}, # C cedilla
1157: '(egrave|#232)' => {'tex' => '\350', 'web' => "\x{e8}"}, # e accent grave.
1158: '(eacute|#233)' => {'tex' => '\351', 'web' => "\x{e9}"}, # e accent acute.
1159: '(ecirc|#234)' => {'tex' => '\352', 'web' => "\x{ea}" }, # e circumflex.
1160: '(euml|#235)' => {'tex' => '\353', 'web' => "\x{eb}"}, # e umlaut.
1161: '(igrave|#236)' => {'tex' => '\354', 'web' => "\x{ec}"}, # i grave.
1162: '(iacute|#237)' => {'tex' => '\355', 'web' => "\x{ed}"}, # i acute.
1163: '(icirc|#238)' => {'tex' => '\356', 'web' => "\x{ee}"}, # i circumflex.
1164: '(iuml|#239)' => {'tex' => '\357', 'web' => "\x{ef}"}, # i umlaut.
1165: '(eth|#240)' => {'tex' => '\360', 'web' => "\x{f0}"}, # Icelandic eth.
1166: '(ntilde|#241)' => {'tex' => '\361', 'web' => "\x{f1}"}, # n tilde.
1167: '(ograve|#242)' => {'tex' => '\362', 'web' => "\x{f2}"}, # o grave.
1168: '(oacute|#243)' => {'tex' => '\363', 'web' => "\x{f3}"}, # o acute.
1169: '(ocirc|#244)' => {'tex' => '\364', 'web' => "\x{f4}"}, # o circumflex.
1170: '(otilde|#245)' => {'tex' => '\365', 'web' => "\x{f5}"}, # o tilde.
1171: '(ouml|#246)' => {'tex' => '\366', 'web' => "\x{f6}"}, # o umlaut.
1172: '(divide|#247)' => {'tex' => '\367', 'web' => "\x{f7}"}, # division symbol
1173: '(oslash|#248)' => {'tex' => '\370', 'web' => "\x{f8}"}, # o slashed.
1174: '(ugrave|#249)' => {'tex' => '\371', 'web' => "\x{f9}"}, # u accent grave.
1175: '(uacute|#250)' => {'tex' => '\372', 'web' => "\x{fa}"}, # u acute.
1176: '(ucirc|#251)' => {'tex' => '\373', 'web' => "\x{fb}"}, # u circumflex.
1177: '(uuml|#252)' => {'tex' => '\374', 'web' => "\x{fc}"}, # u umlaut.
1178: '(yacute|#253)' => {'tex' => '\375', 'web' => "\x{fd}"}, # y acute accent.
1179: '(thorn|#254)' => {'tex' => '\376', 'web' => "\x{fe}"}, # small thorn (icelandic).
1180: '(yuml|#255)' => {'tex' => '\377', 'web' => "\x{ff}"}, # y umlaut.
1181:
1182: # Latin extended A entities:
1183:
1184: '(OElig|#338)' => {'tex' => '{/Text \326}', 'web' => "\x{152}"}, # OE ligature.
1185: '(oelig|#339)' => {'tex' => '{/Text \366}', 'web' => "\x{153}"}, # oe ligature.
1186: '(Scaron|#352)' => {'tex' => 'S', 'web' => "\x{160}"}, # S caron no printable.
1187: '(scaron|#353)' => {'tex' => 's', 'web' => "\x{161}"}, # s caron no printable.
1188: '(Yuml|#376)' => {'tex' => 'Y', 'web' => "\x{178}"}, # Y umlaut - no printable.
1189:
1190: # Latin extended B.
1191:
1192: '(fnof|#402)' => {'tex' =>'{/Symbol \246}', 'web' => "\x{192}"}, # f with little hook.
1193:
1194: # Standalone accents:
1195:
1196: '(circ|#710)' => {'tex' => '^', 'web' => '^'}, # circumflex.
1197: '(tilde|#732)' => {'tex' => '~', 'web' => '~'}, # tilde.
1198:
1199: # General punctuation. We're not able to make a distinction between
1200: # the various length spacings in the print version. (e.g. en/em/thin).
1201: # the various joiners will be empty strings in the print version too.
1202:
1203:
1204: '(ensp|#8194)' => {'tex' => ' ', 'web' => "\x{2002}"}, # en space.
1205: '(emsp|#8195)' => {'tex' => ' ', 'web' => "\x{2003}"}, # em space.
1206: '(thinsp|#8201)' => {'tex' => ' ', 'web' => "\x{2009}"}, # thin space.
1207: '(zwnj|#8204)' => {'tex' => ' ', 'web' => "\x{200c}"}, # Zero width non joiner.
1208: '(zwj|#8205)' => {'tex' => ' ', 'web' => "\x{200d}"}, # Zero width joiner.
1209: '(lrm|#8206)' => {'tex' => ' ', 'web' => "\x{200e}"}, # Left to right mark
1210: '(rlm|#8207)' => {'tex' => ' ', 'web' => "\x{200f}"}, # right to left mark.
1211: '(ndash|#8211)' => {'tex' => '{/Text \55}', 'web' => "\x{2013}"}, # en dash.
1212: '(mdash|#8212)' => {'tex' => '{/Symbol \55}', 'web' => "\x{2014}"}, # em dash.
1213: '(lsquo|#8216)' => {'tex' => '{/Text \140}', 'web' => "\x{2018}"}, # Left single quote.
1214: '(rsquo|#8217)' => {'tex' => '\47', 'web' => "\x{2019}"}, # Right single quote.
1215: '(sbquo|#8218)' => {'tex' => '\54', 'web' => "\x{201a}"}, # Single low-9 quote.
1216: '(ldquo|#8220)' => {'tex' => '\42', 'web' => "\x{201c}"}, # Left double quote.
1217: '(rdquo|#8221)' => {'tex' => '\42', 'web' => "\x{201d}"}, # Right double quote.
1218: '(bdquo|#8222)' => {'tex' => ',', 'web' => "\x{201e}"}, # Double low-9 quote.
1219: '(dagger|#8224)' => {'tex' => '+', 'web' => "\x{2020}"}, # Is this a dagger I see before me now?
1220: '(Dagger|#8225)' => {'tex' => '\261', 'web' => "\x{2021}"}, # it's handle pointing towards my heart?
1221: '(bull|#8226)' => {'tex' => '\267', 'web' => "\x{2022}"}, # Bullet.
1222: '(hellep|#8230)' => {'tex' => '{/Symbol \274}', 'web' => "\x{2026}"}, # Ellipses.
1223: '(permil|#8240)' => {'tex' => '%_o', 'web' => "\x{2031}"}, # Per mille.
1224: '(prime|#8242)' => {'tex' => '\264', 'web' => "\x{2032}"}, # Prime.
1225: '(Prime|#8243)' => {'tex' => '{/Symbol \262}', 'web' => "\x{2033}"}, # double prime.
1226: '(lsaquo|#8249)' => {'tex' => '<', 'web' => "\x{2039}"}, # < quote.
1227: '(rsaquo|#8250)' => {'tex' => '\74', 'web' => "\x{203a}"}, # > quote.
1228: '(oline|#8254)' => {'tex' => '{/Symbol \140}', 'web' => "\x{203e}"}, # Overline.
1229: '(frasl|#8260)' => {'tex' => '/', 'web' => "\x{2044}"}, # Fraction slash.
1230: '(euro|#8364)' => {'tex' => '{/Symbol \240}', 'web' => "\x{20ac}"}, # Euro currency.
1231:
1232: # Letter like symbols.
1233:
1234: '(weierp|#8472)' => {'tex' => '{/Symbol \303}', 'web' => "\x{2118}"}, # Power set symbol
1235: '(image|#8465)' => {'tex' => '{/Symbol \301}', 'web' => "\x{2111}"}, # Imaginary part
1236: '(real|#8476)' => {'tex' => '{/Symbol \302}', 'web' => "\x{211c}"}, # Real part.
1237: '(trade|#8482)' => {'tex' => '{/Symbol \344}', 'web' => "\x{2122}"}, # trademark symbol.
1238: '(alefsym|#8501)' => {'tex' => '{/Symbol \300}', 'web' => "\x{2135}"}, # Hebrew alef.
1239:
1240: # Arrows of various types and directions.
1241: '(larr|#8592)' => {'tex' => '{/Symbol \254}', 'web' => "\x{2190}"}, # <--
1242: '(uarr|#8593)' => {'tex' => '{/Symbol \255}', 'web' => "\x{2191}"}, # up arrow.
1243: '(rarr|#8594)' => {'tex' => '{/Symbol \256}', 'web' => "\x{2192}"}, # -->
1244: '(darr|#8595)' => {'tex' => '{/Symbol \257}', 'web' => "\x{2193}"}, # down arrow.
1245: '(harr|#8596)' => {'tex' => '{/Symbol \253}', 'web' => "\x{2194}"}, # <-->
1246: '(crarr|#8629)' => {'tex' => '{/Symbol \277}', 'web' => "\x{21b5}"}, # corner arrow down and right.
1247: '(lArr|#8656)' => {'tex' => '{/Symbol \334}', 'web' => "\x{21d0}"}, # <==
1248: '(uArr|#8657)' => {'tex' => '{/Symbol \335}', 'web' => "\x{21d1}"}, # Up double arrow.
1249: '(rArr|#8658)' => {'tex' => '{/Symbol \336}', 'web' => "\x{21d2}"}, # ==>
1250: '(dArr|#8659)' => {'tex' => '{/Symbol \337}', 'web' => "\x{21d3}"}, # Down double arrow.
1251: '(hArr|#8660)' => {'tex' => '{/Symbol \333}', 'web' => "\x{21d4}"}, # <==>
1252:
1253: # Mathematical operators. For some of these we do the best we can in printing.
1254:
1255: '(forall|#8704)' => {'tex' => '{/Symbol \42}', 'web' => "\x{2200}"}, # For all.
1256: '(part|#8706)' => {'tex' => '{/Symbol d}', 'web' => "\x{2202}"}, # partial derivative
1257: '(exist|#8707)' => {'tex' => '{/Symbol \44}', 'web' => "\x{2203}"}, # There exists.
1258: '(empty|#8709)' => {'tex' => '{/Symbol \306}', 'web' => "\x{2205}"}, # Null set.
1259: '(nabla|#8711)' => {'tex' => '{/Symbol \321}', 'web' => "\x{2207}"}, # Gradient e.g.
1260: '(isin|#8712)' => {'tex' => '{/Symbol \316}', 'web' => "\x{2208}"}, # Element of the set.
1261: '(notin|#8713)' => {'tex' => '{/Symbol \317}', 'web' => "\x{2209}"}, # Not an element of
1262: '(ni|#8715)' => {'tex' => '{/Symbol \47}', 'web' => "\x{220b}"}, # Contains as a member
1263: '(prod|#8719)' => {'tex' => '{/Symbol \325}', 'web' => "\x{220f}"}, # Product
1264: '(sum|#8721)' => {'tex' => '{/Symbol \345}', 'web' => "\x{2211}"}, # Sum of.
1265: '(minus|#8722)' => {'tex' => '{/Symbol \55}', 'web' => "\x{2212}"}, # - sign.
1266: '(lowast|#8727)' => {'tex' => '*', 'web' => "\x{2217}"}, # *
1267: '(radic|#8730)' => {'tex' => '{/Symbol \326}', 'web' => "\x{221a}"}, # Square root.
1268: '(prop|#8733)' => {'tex' => '{/Symbol \265}', 'web' => "\x{221d}"}, # Proportional to.
1269: '(infin|#8734)' => {'tex' => '{/Symbol \245}', 'web' => "\x{221e}"}, # Infinity.
1270: '(ang|#8736)' => {'tex' => '{/Symbol \320}', 'web' => "\x{2220}"}, # Angle .
1271: '(and|#8743)' => {'tex' => '{/Symbol \331}', 'web' => "\x{2227}"}, # Logical and.
1272: '(or|#8744)' => {'tex' => '{/Symbol \332}', 'web' => "\x{2228}"}, # Logical or.
1273: '(cap|#8745)' => {'tex' => '{/Symbol \307}', 'web' => "\x{2229}"}, # Set intersection.
1274: '(cup|#8746)' => {'tex' => '{/Symbol \310}', 'web' => "\x{222a}"}, # Set union.
1275: '(int|8747)' => {'tex' => '{/Symbol \362}', 'web' => "\x{222b}"}, # Integral.
1276:
1277: # Some gnuplot guru will have to explain to me why the next three
1278: # require the extra slashes... else they print very funkily.
1279:
1280: '(there4|#8756)' => {'tex' => '{/Symbol \\\134}', 'web' => "\x{2234}"}, # Therefore triple dots.
1281: '(sim|#8764)' => {'tex' => '\\\176', 'web' => "\x{223c}"}, # Simlar to.
1282: '(cong|#8773)' => {'tex' => '{/Symbol \\\100}','web' => "\x{2245}"}, # Congruent to/with.
1283:
1284: '(asymp|#8776)' => {'tex' => '{/Symbol \273}', 'web' => "\x{2248}"}, # Asymptotic to.
1285: '(ne|#8800)' => {'tex' => '{/Symbol \271}', 'web' => "\x{2260}"}, # not equal to.
1286: '(equiv|#8801)' => {'tex' => '{/Symbol \272}', 'web' => "\x{2261}"}, # Equivalent to.
1287: '(le|8804)' => {'tex' => '{/Symbol \243}', 'web' => "\x{2264}"}, # Less than or equal to.
1288: '(ge|8805)' => {'tex' => '{/Symbol \263}', 'web' => "\x{2265}"}, # Greater than or equal to
1289: '(sub|8834)' => {'tex' => '{/Symbol \314}', 'web' => "\x{2282}"}, # Subset of.
1290: '(sup|8835)' => {'tex' => '{/Symbol \311}', 'web' => "\x{2283}"}, # Super set of.
1291: '(nsub|8836)' => {'tex' => '{/Symbol \313}', 'web' => "\x{2284}"}, # not subset of.
1292: '(sube|8838)' => {'tex' => '{/Symbol \315}', 'web' => "\x{2286}"}, # Subset or equal.
1293: '(supe|8839)' => {'tex' => '{/Symbol \312}', 'web' => "\x{2287}"}, # Superset or equal
1294: '(oplus|8853)' => {'tex' => '{/Symbol \305}', 'web' => "\x{2295}"}, # O with plus inside
1295: '(otimes|8855)' => {'tex' => '{/Symbol \304}', 'web' => "\x{2297}"}, # O with times.
1296: '(perp|8869)' => {'tex' => '{/Symbol \136}', 'web' => "\x{22a5}"}, # Perpendicular.
1297: '(sdot|8901)' => {'tex' => '{/Symbol \227}', 'web' => "\x{22c5}"}, # Dot operator.
1298:
1299: # Misc. technical symbols:
1300:
1301: '(lceil|8698)' => {'tex' => '{/Symbol \351}', 'web' => "\x{2308}"}, # Left ceiling.
1302: '(rceil|8969)' => {'tex' => '{/Symbol \371}', 'web' => "\x{2309}"}, # Right ceiling.
1303: '(lfloor|8970)' => {'tex' => '{/Symbol \353}', 'web' => "\x{230a}"}, # Left floor.
1304: '(rfloor|8971)' => {'tex' => '{/Symbol \373}', 'web' => "\x{230b}"}, # Right floor.
1305:
1306: # The gnuplot png font evidently does not have the big angle brackets at
1307: # positions 0x2329, 0x232a so use ordinary brackets.
1308:
1309: '(lang|9001)' => {'tex' => '{/Symbol \341}', 'web' => '<'}, # Left angle bracket.
1310: '(rang|9002)' => {'tex' => '{/Symbol \361}', 'web' => '>'}, # Right angle bracket.
1311:
1312: # Gemoetric shapes.
1313:
1314: '(loz|9674)' => {'tex' => '{/Symbol \340}', 'web' => "\x{25ca}"}, # Lozenge.
1315:
1316: # Misc. symbols
1317:
1318: '(spades|9824)' => {'tex' => '{/Symbol \252}', 'web' => "\x{2660}"},
1319: '(clubs|9827)' => {'tex' => '{/Symbol \247}', 'web' => "\x{2663}"},
1320: '(hearts|9829)' => {'tex' => '{/Symbol \251}', 'web' => "\x{2665}"},
1321: '(diams|9830)' => {'tex' => '{/Symbol \250}', 'web' => "\x{2666}"}
1322:
1323: );
1324:
1325:
1326: sub replace_entities {
1327: my ($target,$text) = @_;
1328: $text =~ s{([_^~\{\}]|\\\\)}{\\\\$1}g;
1329: while (my ($re, $replace) = each(%lookup)) {
1330: my $repl = $replace->{$target};
1331: $text =~ s/&$re;/$replace->{$target}/g;
1332: }
1333: $text =~ s{(&)}{\\\\$1}g;
1334: return $text;
1335: }
1336:
1337: ##------------------------------------------------------------------- title
1338: sub start_title {
1339: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1340: my $result='';
1341: if ($target eq 'web' || $target eq 'tex') {
1342: $title = &Apache::lonxml::get_all_text("/title",$parser,$style);
1343: $title=&Apache::run::evaluate($title,$safeeval,$$parstack[-1]);
1344: $title =~ s/\n/ /g;
1345: if (length($title) > $max_str_len) {
1346: $title = substr($title,0,$max_str_len);
1347: }
1348: $title = &parse_label($target,$title);
1349: } elsif ($target eq 'edit') {
1350: $result.=&Apache::edit::tag_start($target,$token,'Plot Title');
1351: my $text=&Apache::lonxml::get_all_text("/title",$parser,$style);
1352: $result.=&Apache::edit::editline('',$text,'',60);
1353: } elsif ($target eq 'modified') {
1354: $result.=&Apache::edit::rebuild_tag($token);
1355: $result.=&Apache::edit::modifiedfield("/title",$parser);
1356: }
1357: return $result;
1358: }
1359:
1360: sub end_title {
1361: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1362: my $result = '';
1363: if ($target eq 'web' || $target eq 'tex') {
1364: } elsif ($target eq 'edit') {
1365: $result.=&Apache::edit::tag_end($target,$token);
1366: }
1367: return $result;
1368: }
1369: ##------------------------------------------------------------------- xlabel
1370: sub start_xlabel {
1371: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1372: my $result='';
1373: if ($target eq 'web' || $target eq 'tex') {
1374: $xlabel = &Apache::lonxml::get_all_text("/xlabel",$parser,$style);
1375: $xlabel=&Apache::run::evaluate($xlabel,$safeeval,$$parstack[-1]);
1376: $xlabel =~ s/\n/ /g;
1377: if (length($xlabel) > $max_str_len) {
1378: $xlabel = substr($xlabel,0,$max_str_len);
1379: }
1380: $xlabel = &parse_label($target,$xlabel);
1381: } elsif ($target eq 'edit') {
1382: $result.=&Apache::edit::tag_start($target,$token,'Plot Xlabel');
1383: my $text=&Apache::lonxml::get_all_text("/xlabel",$parser,$style);
1384: $result.=&Apache::edit::editline('',$text,'',60);
1385: } elsif ($target eq 'modified') {
1386: $result.=&Apache::edit::rebuild_tag($token);
1387: $result.=&Apache::edit::modifiedfield("/xlabel",$parser);
1388: }
1389: return $result;
1390: }
1391:
1392: sub end_xlabel {
1393: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1394: my $result = '';
1395: if ($target eq 'web' || $target eq 'tex') {
1396: } elsif ($target eq 'edit') {
1397: $result.=&Apache::edit::tag_end($target,$token);
1398: }
1399: return $result;
1400: }
1401:
1402: ##------------------------------------------------------------------- ylabel
1403: sub start_ylabel {
1404: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1405: my $result='';
1406: if ($target eq 'web' || $target eq 'tex') {
1407: $ylabel = &Apache::lonxml::get_all_text("/ylabel",$parser,$style);
1408: $ylabel = &Apache::run::evaluate($ylabel,$safeeval,$$parstack[-1]);
1409: $ylabel =~ s/\n/ /g;
1410: if (length($ylabel) > $max_str_len) {
1411: $ylabel = substr($ylabel,0,$max_str_len);
1412: }
1413: $ylabel = &parse_label($target,$ylabel);
1414: } elsif ($target eq 'edit') {
1415: $result .= &Apache::edit::tag_start($target,$token,'Plot Ylabel');
1416: my $text = &Apache::lonxml::get_all_text("/ylabel",$parser,$style);
1417: $result .= &Apache::edit::editline('',$text,'',60);
1418: } elsif ($target eq 'modified') {
1419: $result.=&Apache::edit::rebuild_tag($token);
1420: $result.=&Apache::edit::modifiedfield("/ylabel",$parser);
1421: }
1422: return $result;
1423: }
1424:
1425: sub end_ylabel {
1426: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1427: my $result = '';
1428: if ($target eq 'web' || $target eq 'tex') {
1429: } elsif ($target eq 'edit') {
1430: $result.=&Apache::edit::tag_end($target,$token);
1431: }
1432: return $result;
1433: }
1434:
1435: ##------------------------------------------------------------------- label
1436: sub start_label {
1437: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1438: my $result='';
1439: if ($target eq 'web' || $target eq 'tex') {
1440: my %label;
1441: &get_attributes(\%label,\%label_defaults,$parstack,$safeeval,
1442: $tagstack->[-1]);
1443: my $text = &Apache::lonxml::get_all_text("/label",$parser,$style);
1444: $text = &Apache::run::evaluate($text,$safeeval,$$parstack[-1]);
1445: $text =~ s/\n/ /g;
1446: $text = substr($text,0,$max_str_len) if (length($text) > $max_str_len);
1447: $label{'text'} = &parse_label($target,$text);
1448: push(@labels,\%label);
1449: } elsif ($target eq 'edit') {
1450: $result .= &Apache::edit::tag_start($target,$token,'Plot Label');
1451: $result .= &edit_attributes($target,$token,\%label_defaults);
1452: my $text = &Apache::lonxml::get_all_text("/label",$parser,$style);
1453: $result .= &Apache::edit::end_row().
1454: &Apache::edit::start_spanning_row().
1455: &Apache::edit::editline('',$text,'',60);
1456: } elsif ($target eq 'modified') {
1457: &Apache::edit::get_new_args
1458: ($token,$parstack,$safeeval,keys(%label_defaults));
1459: $result.=&Apache::edit::rebuild_tag($token);
1460: $result.=&Apache::edit::modifiedfield("/label",$parser);
1461: }
1462: return $result;
1463: }
1464:
1465: sub end_label {
1466: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1467: my $result = '';
1468: if ($target eq 'web' || $target eq 'tex') {
1469: } elsif ($target eq 'edit') {
1470: $result.=&Apache::edit::tag_end($target,$token);
1471: }
1472: return $result;
1473: }
1474:
1475: ##------------------------------------------------------------------- curve
1476: sub start_curve {
1477: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1478: my $result='';
1479: &Apache::lonxml::register('Apache::lonplot',('function','data'));
1480: push (@Apache::lonxml::namespace,'curve');
1481: if ($target eq 'web' || $target eq 'tex') {
1482: my %curve;
1483: &get_attributes(\%curve,\%curve_defaults,$parstack,$safeeval,
1484: $tagstack->[-1]);
1485: push (@curves,\%curve);
1486: } elsif ($target eq 'edit') {
1487: &fixup_colors($token);
1488: $result .= &Apache::edit::tag_start($target,$token,'Curve');
1489: $result .= &edit_attributes($target,$token,\%curve_defaults,
1490: \@curve_edit_order)
1491: .&Apache::edit::end_row()
1492: .&Apache::edit::start_spanning_row();
1493:
1494: } elsif ($target eq 'modified') {
1495: my $constructtag=&Apache::edit::get_new_args
1496: ($token,$parstack,$safeeval,keys(%curve_defaults));
1497: my $fixed = &fixup_colors($token);
1498: if ($constructtag || $fixed) {
1499: $result = &Apache::edit::rebuild_tag($token);
1500: }
1501: }
1502: return $result;
1503: }
1504:
1505: sub end_curve {
1506: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1507: my $result = '';
1508: pop @Apache::lonxml::namespace;
1509: &Apache::lonxml::deregister('Apache::lonplot',('function','data'));
1510: if ($target eq 'web' || $target eq 'tex') {
1511: } elsif ($target eq 'edit') {
1512: $result.=&Apache::edit::tag_end($target,$token);
1513: }
1514: return $result;
1515: }
1516:
1517: ##------------------------------------------------------------ curve function
1518: sub start_function {
1519: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1520: my $result='';
1521: if ($target eq 'web' || $target eq 'tex') {
1522: if (exists($curves[-1]->{'data'})) {
1523: &Apache::lonxml::warning
1524: ('Use of the <b>curve function</b> tag precludes use of '.
1525: ' the <b>curve data</b> tag. '.
1526: 'The curve data tag will be omitted in favor of the '.
1527: 'curve function declaration.');
1528: delete $curves[-1]->{'data'} ;
1529: }
1530: my $function = &Apache::lonxml::get_all_text("/function",$parser,
1531: $style);
1532: $function = &Apache::run::evaluate($function,$safeeval,$$parstack[-1]);
1533: $function=~s/\^/\*\*/gs;
1534: $function=~ s/^\s+//; # Trim leading
1535: $function=~ s/\s+$//; # And trailing whitespace.
1536: $curves[-1]->{'function'} = $function;
1537: } elsif ($target eq 'edit') {
1538: $result .= &Apache::edit::tag_start($target,$token,'Gnuplot compatible curve function');
1539: my $text = &Apache::lonxml::get_all_text("/function",$parser,$style);
1540: $result .= &Apache::edit::editline('',$text,'',60);
1541: } elsif ($target eq 'modified') {
1542: $result.=&Apache::edit::rebuild_tag($token);
1543: $result.=&Apache::edit::modifiedfield("/function",$parser);
1544: }
1545: return $result;
1546: }
1547:
1548: sub end_function {
1549: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1550: my $result = '';
1551: if ($target eq 'web' || $target eq 'tex') {
1552: } elsif ($target eq 'edit') {
1553: $result .= &Apache::edit::end_table();
1554: }
1555: return $result;
1556: }
1557:
1558: ##------------------------------------------------------------ curve data
1559: sub start_data {
1560: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1561: my $result='';
1562: if ($target eq 'web' || $target eq 'tex') {
1563: if (exists($curves[-1]->{'function'})) {
1564: &Apache::lonxml::warning
1565: ('Use of the <b>curve function</b> tag precludes use of '.
1566: ' the <b>curve data</b> tag. '.
1567: 'The curve function tag will be omitted in favor of the '.
1568: 'curve data declaration.');
1569: delete($curves[-1]->{'function'});
1570: }
1571: my $datatext = &Apache::lonxml::get_all_text("/data",$parser,$style);
1572: $datatext=&Apache::run::evaluate($datatext,$safeeval,$$parstack[-1]);
1573: # Deal with cases where we're given an array...
1574: if ($datatext =~ /^\@/) {
1575: $datatext = &Apache::run::run('return "'.$datatext.'"',
1576: $safeeval,1);
1577: }
1578: $datatext =~ s/\s+/ /g;
1579: # Need to do some error checking on the @data array -
1580: # make sure it's all numbers and make sure each array
1581: # is of the same length.
1582: my @data;
1583: if ($datatext =~ /,/) { # comma deliminated
1584: @data = split /,/,$datatext;
1585: } else { # Assume it's space separated.
1586: @data = split / /,$datatext;
1587: }
1588: for (my $i=0;$i<=$#data;$i++) {
1589: # Check that it's non-empty
1590: if (! defined($data[$i])) {
1591: &Apache::lonxml::warning(
1592: 'undefined curve data value. Replacing with '.
1593: ' pi/e = 1.15572734979092');
1594: $data[$i] = 1.15572734979092;
1595: }
1596: # Check that it's a number
1597: if (! &$real_test($data[$i]) & ! &$int_test($data[$i])) {
1598: &Apache::lonxml::warning(
1599: 'Bad curve data value of '.$data[$i].' Replacing with '.
1600: ' pi/e = 1.15572734979092');
1601: $data[$i] = 1.15572734979092;
1602: }
1603: }
1604: # complain if the number of data points is not the same as
1605: # in previous sets of data.
1606: if (($curves[-1]->{'data'}) && ($#data != $#{$curves[-1]->{'data'}->[0]})){
1607: &Apache::lonxml::warning
1608: ('Number of data points is not consistent with previous '.
1609: 'number of data points');
1610: }
1611: push @{$curves[-1]->{'data'}},\@data;
1612: } elsif ($target eq 'edit') {
1613: $result .= &Apache::edit::tag_start($target,$token,'Comma or space deliminated curve data');
1614: my $text = &Apache::lonxml::get_all_text("/data",$parser,$style);
1615: $result .= &Apache::edit::editline('',$text,'',60);
1616: } elsif ($target eq 'modified') {
1617: $result.=&Apache::edit::rebuild_tag($token);
1618: $result.=&Apache::edit::modifiedfield("/data",$parser);
1619: }
1620: return $result;
1621: }
1622:
1623: sub end_data {
1624: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1625: my $result = '';
1626: if ($target eq 'web' || $target eq 'tex') {
1627: } elsif ($target eq 'edit') {
1628: $result .= &Apache::edit::end_table();
1629: }
1630: return $result;
1631: }
1632:
1633: ##------------------------------------------------------------------- axis
1634: sub start_axis {
1635: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1636: my $result='';
1637: if ($target eq 'web' || $target eq 'tex') {
1638: &get_attributes(\%axis,\%axis_defaults,$parstack,$safeeval,
1639: $tagstack->[-1]);
1640: } elsif ($target eq 'edit') {
1641: &fixup_colors($token);
1642: $result .= &Apache::edit::tag_start($target,$token,'Plot Axes');
1643: $result .= &edit_attributes($target,$token,\%axis_defaults,
1644: \@axis_edit_order);
1645: } elsif ($target eq 'modified') {
1646: my $constructtag=&Apache::edit::get_new_args
1647: ($token,$parstack,$safeeval,keys(%axis_defaults));
1648: my $fixed = &fixup_colors($token);
1649: if ($constructtag || $fixed) {
1650: $result = &Apache::edit::rebuild_tag($token);
1651: }
1652: }
1653: return $result;
1654: }
1655:
1656: sub end_axis {
1657: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1658: my $result = '';
1659: if ($target eq 'web' || $target eq 'tex') {
1660: } elsif ($target eq 'edit') {
1661: $result.=&Apache::edit::tag_end($target,$token);
1662: } elsif ($target eq 'modified') {
1663: }
1664: return $result;
1665: }
1666:
1667: ###################################################################
1668: ## ##
1669: ## Utility Functions ##
1670: ## ##
1671: ###################################################################
1672:
1673: ##----------------------------------------------------------- set_defaults
1674: sub set_defaults {
1675: my ($var,$defaults) = @_;
1676: my $key;
1677: foreach $key (keys(%$defaults)) {
1678: $var->{$key} = $defaults->{$key}->{'default'};
1679: }
1680: }
1681:
1682: ##------------------------------------------------------------------- misc
1683: sub get_attributes{
1684: my ($values,$defaults,$parstack,$safeeval,$tag) = @_;
1685: foreach my $attr (keys(%{$defaults})) {
1686: if ($attr eq 'texwidth' || $attr eq 'texfont') {
1687: $values->{$attr} =
1688: &Apache::lonxml::get_param($attr,$parstack,$safeeval,undef,1);
1689: } else {
1690: $values->{$attr} =
1691: &Apache::lonxml::get_param($attr,$parstack,$safeeval);
1692: }
1693: if ($values->{$attr} eq '' | !defined($values->{$attr})) {
1694: $values->{$attr} = $defaults->{$attr}->{'default'};
1695: next;
1696: }
1697: my $test = $defaults->{$attr}->{'test'};
1698: if (! &$test($values->{$attr})) {
1699: my $warning = &mt('Replacing your value with: [_1].',
1700: $defaults->{$attr}->{'default'});
1701: my $missingprefix;
1702: if (($env{'form.problemmode'} eq 'editxml') ||
1703: ($env{'form.problemmode'} eq 'edit')) {
1704: $warning = &mt('On display your value will be replaced with: [_1].',
1705: $defaults->{$attr}->{'default'});
1706: if (($env{'form.problemmode'} eq 'edit') &&
1707: ($attr =~ /^(|fg|bg)color$/) && ($values->{$attr} =~ /^[\da-fA-F]{6}$/)) {
1708: $missingprefix = 1;
1709: $warning = &mt('The current value is missing the prefix: [_1].',
1710: $colorprefix).' '.
1711: &mt('As the color picker entry adds the prefix, saving will fix this issue.');
1712: }
1713: }
1714: unless ($missingprefix) {
1715: $values->{$attr} = $defaults->{$attr}->{'default'};
1716: }
1717: &Apache::lonxml::warning
1718: ($tag.':'.$attr.': '.&mt('Bad value').'. '.$warning);
1719: }
1720: }
1721: return ;
1722: }
1723: ##
1724: # Generate tic mark specifications.
1725: #
1726: # @param type - type of tics (xtics or ytics).
1727: # @param spec - Reference to a hash that contains the tic specification.
1728: # @param target - 'tex' if hard copy target.
1729: #
1730: # @return string - the tic specification command.
1731: #
1732: sub generate_tics {
1733: my ($type, $spec, $target) = @_;
1734: my $result = '';
1735:
1736:
1737: if ((ref($spec) eq 'HASH') && (keys(%{$spec}) > 0)) {
1738:
1739:
1740:
1741: # Major tics: - If there are 'ticspecs' these override any other
1742: # specifications:
1743:
1744:
1745:
1746: $result .= "set $type $spec->{'location'} ";
1747: $result .= ($spec->{'mirror'} eq 'on') ? 'mirror ' : 'nomirror ';
1748: if ($spec->{'rotate'} eq 'on') {
1749: $result .= ' rotate ';
1750: }
1751: if (defined $spec->{'ticspecs'}) {
1752: $result .= '( ';
1753: my @ticspecs;
1754: my $ticinfo = $spec->{'ticspecs'};
1755: foreach my $tic (@$ticinfo) {
1756: push(@ticspecs, '"' . $tic->{'label'} . '" ' . $tic->{'pos'} );
1757: }
1758: $result .= join(', ', (@ticspecs));
1759: $result .= ' )';
1760: } else {
1761: $result .= "$spec->{'start'}, ";
1762: $result .= "$spec->{'increment'}, ";
1763: $result .= "$spec->{'end'} ";
1764: }
1765: if ($target eq 'tex' ) {
1766: $result .= 'font "Helvetica,22"';
1767: }
1768: $result .= "\n";
1769:
1770: # minor frequency:
1771:
1772: if ($spec->{'minorfreq'} != 0) {
1773: $result .= "set m$type $spec->{'minorfreq'}\n";
1774: }
1775: } elsif ($target eq 'tex' ) {
1776: $result .= "set $type font " . '"Helvetica,22"' ."\n";
1777: }
1778:
1779:
1780: return $result;
1781: }
1782:
1783: ##------------------------------------------------------- write_gnuplot_file
1784: sub write_gnuplot_file {
1785: my ($tmpdir,$filename,$target)= @_;
1786: my ($fontsize, $font_properties) = &get_font($target);
1787: my $gnuplot_input = '';
1788: my $curve;
1789: #
1790: # Check to be sure we do not have any empty curves
1791: my @curvescopy;
1792: foreach my $curve (@curves) {
1793: if (exists($curve->{'function'})) {
1794: if ($curve->{'function'} !~ /^\s*$/) {
1795: push(@curvescopy,$curve);
1796: }
1797: } elsif (exists($curve->{'data'})) {
1798: foreach my $data (@{$curve->{'data'}}) {
1799: if (scalar(@$data) > 0) {
1800: push(@curvescopy,$curve);
1801: last;
1802: }
1803: }
1804: }
1805: }
1806: @curves = @curvescopy;
1807: # Collect all the colors
1808: my @Colors;
1809: if ($version < 4.6) {
1810: push(@Colors,$Apache::lonplot::plot{'bgcolor'});
1811: push(@Colors,$Apache::lonplot::plot{'fgcolor'});
1812: push(@Colors,(defined($axis{'color'})?$axis{'color'}:$Apache::lonplot::plot{'fgcolor'}));
1813: foreach $curve (@curves) {
1814: push(@Colors,($curve->{'color'} ne '' ?
1815: $curve->{'color'} :
1816: $Apache::lonplot::plot{'fgcolor'}));
1817: }
1818: }
1819:
1820: # set term
1821: if ($target eq 'web') {
1822: $gnuplot_input .= 'set terminal png enhanced nocrop ';
1823: $gnuplot_input .= 'transparent ' if ($Apache::lonplot::plot{'transparent'} eq 'on');
1824: $gnuplot_input .= 'font "'.$Apache::lonnet::perlvar{'lonFontsDir'}.
1825: '/'.$font_properties->{'file'}.'.ttf" ';
1826: $gnuplot_input .= $fontsize;
1827: $gnuplot_input .= ' size '.$Apache::lonplot::plot{'width'}.','.$Apache::lonplot::plot{'height'}.' ';
1828: if ($version >= 4.6) {
1829: if ($Apache::lonplot::plot{'bgcolor'}) {
1830: $gnuplot_input .= "background '$Apache::lonplot::plot{'bgcolor'}'\n";
1831: }
1832: } else {
1833: $gnuplot_input .= "@Colors\n";
1834: }
1835: # set output
1836: $gnuplot_input .= "set output\n";
1837: } elsif ($target eq 'tex') {
1838: $gnuplot_input .= "set term postscript eps enhanced $Apache::lonplot::plot{'plotcolor'} dash ";
1839: if (!$font_properties->{'tex_no_file'}) {
1840: $gnuplot_input .=
1841: 'fontfile "'.$Apache::lonnet::perlvar{'lonFontsDir'}.
1842: '/'.$font_properties->{'file'}.'.pfb" ';
1843: }
1844: if (($version >= 4.6) && ($Apache::lonplot::plot{'plotcolor'} =~ /^colou?r$/) &&
1845: ($Apache::lonplot::plot{'bgcolor'} ne '')) {
1846: $gnuplot_input .= "background '$Apache::lonplot::plot{'bgcolor'}' ";
1847: }
1848: $gnuplot_input .= ' "'.$font_properties->{'printname'}.'" ';
1849: $gnuplot_input .= $fontsize;
1850: $gnuplot_input .= "\nset output \"".$tmpdir.
1851: &unescape($filename).".eps\"\n";
1852: $gnuplot_input .= "set encoding iso_8859_1\n"; # Get access to extended font.
1853:
1854: }
1855: $gnuplot_input .= "set encoding utf8\n";
1856: # cartesian or polar plot?
1857: if (lc($Apache::lonplot::plot{'plottype'}) eq 'polar') {
1858: $gnuplot_input .= 'set polar'.$/;
1859: } else {
1860: # Assume Cartesian
1861: }
1862: # cartesian or polar grid?
1863: if (lc($Apache::lonplot::plot{'gridtype'}) eq 'polar') {
1864: $gnuplot_input .= 'set grid polar'.$/;
1865: } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'linear-log') {
1866: $gnuplot_input .= 'set logscale x'.$/;
1867: } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'log-linear') {
1868: $gnuplot_input .= 'set logscale y'.$/;
1869: } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'log-log') {
1870: $gnuplot_input .= 'set logscale x'.$/;
1871: $gnuplot_input .= 'set logscale y'.$/;
1872: } else {
1873: # Assume Cartesian
1874: }
1875: # solid or pattern for boxes?
1876: if (lc($Apache::lonplot::plot{'fillstyle'}) eq 'solid') {
1877: $gnuplot_input .= 'set style fill solid '.
1878: $Apache::lonplot::plot{'solid'}.$Apache::lonplot::plot{'box_border'}.$/;
1879: } elsif (lc($Apache::lonplot::plot{'fillstyle'}) eq 'pattern') {
1880: $gnuplot_input .= 'set style fill pattern '.$Apache::lonplot::plot{'pattern'}.$Apache::lonplot::plot{'box_border'}.$/;
1881: } elsif (lc($Apache::lonplot::plot{'fillstyle'}) eq 'empty') {
1882: }
1883: # margin
1884: if (lc($Apache::lonplot::plot{'lmargin'}) ne 'default') {
1885: $gnuplot_input .= 'set lmargin '.$Apache::lonplot::plot{'lmargin'}.$/;
1886: }
1887: if (lc($Apache::lonplot::plot{'rmargin'}) ne 'default') {
1888: $gnuplot_input .= 'set rmargin '.$Apache::lonplot::plot{'rmargin'}.$/;
1889: }
1890: if (lc($Apache::lonplot::plot{'tmargin'}) ne 'default') {
1891: $gnuplot_input .= 'set tmargin '.$Apache::lonplot::plot{'tmargin'}.$/;
1892: }
1893: if (lc($Apache::lonplot::plot{'bmargin'}) ne 'default') {
1894: $gnuplot_input .= 'set bmargin '.$Apache::lonplot::plot{'bmargin'}.$/;
1895: }
1896:
1897: # tic scales
1898: if ($version > 4) {
1899: $gnuplot_input .= 'set tics scale '.
1900: $Apache::lonplot::plot{'major_ticscale'}.', '.$Apache::lonplot::plot{'minor_ticscale'}.$/;
1901: } else {
1902: $gnuplot_input .= 'set ticscale '.
1903: $Apache::lonplot::plot{'major_ticscale'}.' '.$Apache::lonplot::plot{'minor_ticscale'}.$/;
1904: }
1905: #boxwidth
1906: if (lc($Apache::lonplot::plot{'boxwidth'}) ne '') {
1907: $gnuplot_input .= 'set boxwidth '.$Apache::lonplot::plot{'boxwidth'}.$/;
1908: }
1909: # gridlayer
1910: $gnuplot_input .= 'set grid noxtics noytics front '.$/
1911: if ($Apache::lonplot::plot{'gridlayer'} eq 'on');
1912:
1913: # grid
1914: if ($Apache::lonplot::plot{'grid'} eq 'on') {
1915: if (($version >= 4.6) && (($axis{'color'} ne '') || ($Apache::lonplot::plot{'fgcolor'} ne ''))) {
1916: if (($target eq 'web') || (($target eq 'tex') &&
1917: ($Apache::lonplot::plot{'plotcolor'} =~ /^colou?r$/))) {
1918: $gnuplot_input .= 'set grid linecolor rgb "'.
1919: (($axis{'color'} ne '')?$axis{'color'}:
1920: $Apache::lonplot::plot{'fgcolor'}).
1921: '" '.$/;
1922:
1923: } else {
1924: $gnuplot_input .= 'set grid'.$/;
1925: }
1926: } else {
1927: $gnuplot_input .= 'set grid'.$/;
1928: }
1929: }
1930: # border
1931: if ($Apache::lonplot::plot{'border'} eq 'on') {
1932: if (($version >= 4.6) && ($Apache::lonplot::plot{'fgcolor'} ne '')) {
1933: if (($target eq 'web') || (($target eq 'tex') &&
1934: ($Apache::lonplot::plot{'plotcolor'} =~ /^colou?r$/))) {
1935: $gnuplot_input .= 'set border linecolor rgb "'.
1936: $Apache::lonplot::plot{'fgcolor'}.'" '.$/;
1937: } else {
1938: $gnuplot_input .= 'set border '.$/;
1939: }
1940: } else {
1941: $gnuplot_input .= 'set border '.$/;
1942: }
1943: } else {
1944: $gnuplot_input .= 'set noborder '.$/;
1945: }
1946: # sampling rate for non-data curves
1947: $gnuplot_input .= "set samples $Apache::lonplot::plot{'samples'}\n";
1948: # title, xlabel, ylabel
1949: # titles
1950: my $extra_space_x = ($xtics{'location'} eq 'axis') ? ' offset 0, -0.5 ' : '';
1951: my $extra_space_y = ($ytics{'location'} eq 'axis') ? ' offset -0.5, 0 ' : '';
1952:
1953: if ($target eq 'tex') {
1954: $gnuplot_input .= "set title \"$title\" font \"".$font_properties->{'printname'}.",".$fontsize."pt\"\n" if (defined($title)) ;
1955: $gnuplot_input .= "set xlabel \"$xlabel\" $extra_space_x font \"".$font_properties->{'printname'}.",".$fontsize."pt\"\n" if (defined($xlabel));
1956: $gnuplot_input .= "set ylabel \"$ylabel\" $extra_space_y font \"".$font_properties->{'printname'}.",".$fontsize."pt\"\n" if (defined($ylabel));
1957: } else {
1958: $gnuplot_input .= "set title \"$title\" \n" if (defined($title)) ;
1959: $gnuplot_input .= "set xlabel \"$xlabel\" $extra_space_x \n" if (defined($xlabel));
1960: $gnuplot_input .= "set ylabel \"$ylabel\" $extra_space_y \n" if (defined($ylabel));
1961: }
1962: # tics
1963: $gnuplot_input .= &generate_tics('xtics', \%xtics, $target);
1964:
1965: $gnuplot_input .= &generate_tics('ytics', \%ytics, $target);
1966:
1967: # axis
1968: if (%axis) {
1969: if ($axis{'xformat'} ne 'on') {
1970: $gnuplot_input .= "set format x ";
1971: if ($axis{'xformat'} eq 'off') {
1972: $gnuplot_input .= "\"\"\n";
1973: } else {
1974: if ($axis{'xformat'} =~ /^(\d+P\s*)[Pp][Ii]/) {
1975: my $xprefix = $1;
1976: if (($target eq 'web') || ($target eq 'tex')) {
1977: $axis{'xformat'} = $xprefix.$lookup{'(pi|#960)'}{$target};
1978: } else {
1979: $axis{'xformat'} = $xprefix;
1980: }
1981: }
1982: $gnuplot_input .= "\"\%.".$axis{'xformat'}."\"\n";
1983: }
1984: }
1985: if ($axis{'yformat'} ne 'on') {
1986: $gnuplot_input .= "set format y ";
1987: if ($axis{'yformat'} eq 'off') {
1988: $gnuplot_input .= "\"\"\n";
1989: } else {
1990: if ($axis{'yformat'} =~ /^(\d+P\s*)[Pp][Ii]/) {
1991: my $yprefix = $1;
1992: if (($target eq 'web') || ($target eq 'tex')) {
1993: $axis{'yformat'} = $yprefix.$lookup{'(pi|#960)'}{$target};
1994: } else {
1995: $axis{'yformat'} = $yprefix;
1996: }
1997: }
1998: $gnuplot_input .= "\"\%.".$axis{'yformat'}."\"\n";
1999: }
2000: }
2001: $gnuplot_input .= "set xrange \[$axis{'xmin'}:$axis{'xmax'}\]\n";
2002: $gnuplot_input .= "set yrange \[$axis{'ymin'}:$axis{'ymax'}\]\n";
2003: if ($axis{'xzero'} ne 'off') {
2004: $gnuplot_input .= "set xzeroaxis ";
2005: if ($axis{'xzero'} eq 'line' || $axis{'xzero'} eq 'thick-line') {
2006: $gnuplot_input .= "lt -1 ";
2007: if ($axis{'xzero'} eq 'thick-line') {
2008: $gnuplot_input .= "lw 3 ";
2009: }
2010: }
2011: $gnuplot_input .= "\n";
2012: }
2013: if ($axis{'yzero'} ne 'off') {
2014: $gnuplot_input .= "set yzeroaxis ";
2015: if ($axis{'yzero'} eq 'line' || $axis{'yzero'} eq 'thick-line') {
2016: $gnuplot_input .= "lt -1 ";
2017: if ($axis{'yzero'} eq 'thick-line') {
2018: $gnuplot_input .= "lw 3 ";
2019: }
2020: }
2021: $gnuplot_input .= "\n";
2022: }
2023: }
2024: # Key
2025: if (%key) {
2026: $gnuplot_input .= 'set key '.$key{'pos'}.' ';
2027: if ($key{'title'} ne '') {
2028: $gnuplot_input .= 'title "'.$key{'title'}.'" ';
2029: }
2030: $gnuplot_input .= ($key{'box'} eq 'on' ? 'box ' : 'nobox ').$/;
2031: } else {
2032: $gnuplot_input .= 'set nokey'.$/;
2033: }
2034: # labels
2035: my $label;
2036: foreach $label (@labels) {
2037: $gnuplot_input .= 'set label "'.$label->{'text'}.'" at '.
2038: $label->{'xpos'}.','.$label->{'ypos'};
2039: if ($label->{'rotate'} ne '') {
2040: $gnuplot_input .= ' rotate by '.$label->{'rotate'};
2041: }
2042: $gnuplot_input .= ' '.$label->{'justify'};
2043:
2044: if ($target eq 'tex') {
2045: $gnuplot_input .=' font "'.$font_properties->{'printname'}.','.$fontsize.'pt"';
2046: }
2047: if (($label->{'zlayer'} eq 'front') || ($label->{'zlayer'} eq 'back')) {
2048: $gnuplot_input .= ' '.$label->{'zlayer'};
2049: }
2050: $gnuplot_input .= $/;
2051: }
2052: if ($target eq 'tex') {
2053: $gnuplot_input .="set size 1,".$Apache::lonplot::plot{'height'}/$Apache::lonplot::plot{'width'}*1.38;
2054: $gnuplot_input .="\n";
2055: }
2056: # curves
2057: #
2058: # Each curve will have its very own linestyle.
2059: # (This should work just fine in web rendition I think).
2060: # The line_xxx variables will hold the elements of the line style.
2061: # type (solid/dashed), color, width
2062: #
2063: my $linestyle_index = 50;
2064: my $line_width = '';
2065: my $plots = '';
2066:
2067: # If arrows are needed there will be an arrow style for each as well:
2068: #
2069:
2070: my $arrow_style_index = 50;
2071:
2072: for (my $i = 0;$i<=$#curves;$i++) {
2073: $curve = $curves[$i];
2074: my $plot_command = '';
2075: my $plot_type = '';
2076: if ($i > 0) {
2077: $plot_type = ', ';
2078: }
2079: if ($target eq 'tex') {
2080: $curve->{'linewidth'} *= 2;
2081: }
2082: $line_width = $curve->{'linewidth'};
2083: if (exists($curve->{'function'})) {
2084: $plot_type .=
2085: $curve->{'function'}.' title "'.
2086: $curve->{'name'}.'" with '.
2087: $curve->{'linestyle'};
2088: } elsif (exists($curve->{'data'})) {
2089: # Store data values in $datatext
2090: my $datatext = '';
2091: # get new filename
2092: my $datafilename = "$tmpdir/$filename.data.$i";
2093: my $fh=Apache::File->new(">$datafilename");
2094: # Compile data
2095: my @Data = @{$curve->{'data'}};
2096: my @Data0 = @{$Data[0]};
2097: for (my $i =0; $i<=$#Data0; $i++) {
2098: my $dataset;
2099: foreach $dataset (@Data) {
2100: $datatext .= $dataset->[$i] . ' ';
2101: }
2102: $datatext .= $/;
2103: }
2104: # write file
2105: print $fh $datatext;
2106: close($fh);
2107: # generate gnuplot text
2108: $plot_type .= '"'.$datafilename.'" title "'.
2109: $curve->{'name'}.'" with '.
2110: $curve->{'linestyle'};
2111: }
2112: my $pointtype = '';
2113: my $pointsize = '';
2114:
2115: # Figure out the linestyle:
2116:
2117: my $lt = $curve->{'linetype'} ne '' ? $curve->{'linetype'}
2118: : 'solid'; # Line type defaults to solid.
2119: # The mapping of lt -> the actual gnuplot line type depends on the target:
2120:
2121: if ($target eq 'tex') {
2122: $lt = $ps_linetypes{$lt};
2123: } else {
2124: $lt = $linetypes{$lt}
2125: }
2126:
2127: my $color = $curve->{'color'};
2128: $color =~ s/^x/#/; # Convert xhex color -> #hex color.
2129:
2130:
2131: if (($curve->{'linestyle'} eq 'points') ||
2132: ($curve->{'linestyle'} eq 'linespoints') ||
2133: ($curve->{'linestyle'} eq 'errorbars') ||
2134: ($curve->{'linestyle'} eq 'xerrorbars') ||
2135: ($curve->{'linestyle'} eq 'yerrorbars') ||
2136: ($curve->{'linestyle'} eq 'xyerrorbars')) {
2137:
2138: $pointtype =' pointtype '.$curve->{'pointtype'};
2139: $pointsize =' pointsize '.$curve->{'pointsize'};
2140: } elsif ($curve->{'linestyle'} eq 'filledcurves') {
2141: $plot_command.= ' '.$curve->{'limit'};
2142: } elsif ($curve->{'linestyle'} eq 'vector') {
2143:
2144: # Create the arrow head style add it to
2145: # $gnuplot_input..and ensure it gets
2146: # Selected in the plot command.
2147:
2148: $gnuplot_input .= "set style arrow $arrow_style_index ";
2149: $gnuplot_input .= ' ' . $curve->{'arrowhead'};
2150: $gnuplot_input .= ' size ' . $curve->{'arrowlength'};
2151: $gnuplot_input .= ','.$curve->{'arrowangle'};
2152: $gnuplot_input .= ',' . $curve->{'arrowbackangle'};
2153: $gnuplot_input .= ' ' . $curve->{'arrowstyle'} . " ls $linestyle_index\n";
2154:
2155:
2156: $plot_command .= " arrowstyle $arrow_style_index ";
2157: $arrow_style_index++;
2158: }
2159:
2160: my $style_command = "set style line $linestyle_index $pointtype $pointsize linetype $lt linewidth $line_width lc rgb '$color'\n";
2161: $gnuplot_input .= $style_command;
2162:
2163: # The condition below is because gnuplot lumps the linestyle in with the
2164: # arrowstyle _sigh_.
2165:
2166: if ($curve->{'linestyle'} ne 'vector') {
2167: $plot_command.= " ls $linestyle_index";
2168: }
2169:
2170: $plots .= $plot_type . ' ' . $plot_command;
2171: $linestyle_index++; # Each curve get a unique linestyle.
2172: }
2173: $gnuplot_input .= 'plot '.$plots;
2174: # Write the output to a file.
2175:
2176: # &Apache::lonnet::logthis($gnuplot_input); # uncomment to log the gnuplot input.
2177: open (my $fh, "> $tmpdir$filename.data");
2178: binmode($fh, ':utf8');
2179: print $fh $gnuplot_input;
2180: close($fh);
2181: # That's all folks.
2182: return ;
2183: }
2184:
2185: #---------------------------------------------- check_inputs
2186: sub check_inputs {
2187: ## Note: no inputs, no outputs - this acts only on global variables.
2188: ## Make sure we have all the input we need:
2189: if (! %Apache::lonplot::plot) { &set_defaults(\%Apache::lonplot::plot,\%gnuplot_defaults); }
2190: if (! %key ) {} # No key for this plot, thats okay
2191: # if (! %axis) { &set_defaults(\%axis,\%axis_defaults); }
2192: if (! defined($title )) {} # No title for this plot, thats okay
2193: if (! defined($xlabel)) {} # No xlabel for this plot, thats okay
2194: if (! defined($ylabel)) {} # No ylabel for this plot, thats okay
2195: if ($#labels < 0) { } # No labels for this plot, thats okay
2196: if ($#curves < 0) {
2197: &Apache::lonxml::warning("No curves specified for plot!!!!");
2198: return '';
2199: }
2200: my $curve;
2201: foreach $curve (@curves) {
2202: if (!defined($curve->{'function'})&&!defined($curve->{'data'})){
2203: &Apache::lonxml::warning("One of the curves specified did not contain any curve data or curve function declarations\n");
2204: return '';
2205: }
2206: }
2207: }
2208:
2209: #------------------------------------------ edit_attributes
2210: sub edit_attributes {
2211: my ($target,$token,$defaults,$keys) = @_;
2212: my ($result,@keys);
2213: if ($keys && ref($keys) eq 'ARRAY') {
2214: @keys = @$keys;
2215: } else {
2216: @keys = sort(keys(%$defaults));
2217: }
2218: foreach my $attr (@keys) {
2219: # append a ' ' to the description if it doesn't have one already.
2220: my $description = $defaults->{$attr}->{'description'};
2221: $description .= ' ' if ($description !~ / $/);
2222: if ($defaults->{$attr}->{'edit_type'} eq 'entry') {
2223: $result .= &Apache::edit::text_arg
2224: ($description,$attr,$token,
2225: $defaults->{$attr}->{'size'},
2226: $defaults->{$attr}->{'class'});
2227: } elsif ($defaults->{$attr}->{'edit_type'} eq 'choice') {
2228: $result .= &Apache::edit::select_or_text_arg
2229: ($description,$attr,$defaults->{$attr}->{'choices'},$token);
2230: } elsif ($defaults->{$attr}->{'edit_type'} eq 'onoff') {
2231: $result .= &Apache::edit::select_or_text_arg
2232: ($description,$attr,['on','off'],$token);
2233: }
2234: $result .= '<br />';
2235: }
2236: return $result;
2237: }
2238:
2239: #------------------------------------------ fixup_colors
2240:
2241: sub fixup_colors {
2242: my ($token,$attribref) = @_;
2243: my @attributes;
2244: if (ref($attribref) eq 'ARRAY') {
2245: @attributes = @{$attribref};
2246: } else {
2247: @attributes = ('color');
2248: }
2249:
2250: #
2251: # Fix up the color attribute since jchooser does not
2252: # prepend an x (or #) to the color:
2253: #
2254: my $had_changes;
2255: if ((ref($token) eq 'ARRAY') && (ref($token->[2]) eq 'HASH')) {
2256: foreach my $attribute (@attributes) {
2257: if ($attribute =~ /^(|bg|fg)color$/) {
2258: my $value = $token->[2]{$attribute};
2259: if (defined($value)) {
2260: if ($version < 4.6) {
2261: $value=~s/^\#/x/;
2262: } else {
2263: $value=~s/^x/#/;
2264: }
2265: if ($value ne $token->[2]{$attribute}) {
2266: $token->[2]{$attribute} = $value;
2267: $had_changes = 1;
2268: }
2269: if ($value !~ /^\Q$colorprefix\E/) {
2270: $token->[2]{$attribute} = $colorprefix . $value;
2271: $had_changes = 1;
2272: }
2273: }
2274: }
2275: }
2276: }
2277: return $had_changes;
2278: }
2279:
2280: ###################################################################
2281: ## ##
2282: ## Insertion functions for editing plots ##
2283: ## ##
2284: ###################################################################
2285:
2286: sub insert_gnuplot {
2287: my $result = '';
2288: # plot attributes
2289: $result .= "\n<gnuplot ";
2290: foreach my $attr (keys(%gnuplot_defaults)) {
2291: $result .= "\n $attr=\"$gnuplot_defaults{$attr}->{'default'}\"";
2292: }
2293: $result .= ">";
2294: # Add the components (most are commented out for simplicity)
2295: # $result .= &insert_key();
2296: # $result .= &insert_axis();
2297: # $result .= &insert_title();
2298: # $result .= &insert_xlabel();
2299: # $result .= &insert_ylabel();
2300: $result .= &insert_curve();
2301: # close up the <gnuplot>
2302: $result .= "\n</gnuplot>";
2303: return $result;
2304: }
2305:
2306: sub insert_tics {
2307: my $result;
2308: $result .= &insert_xtics() . &insert_ytics;
2309: return $result;
2310: }
2311:
2312: sub insert_xtics {
2313: my $result;
2314: $result .= "\n <xtics ";
2315: foreach my $attr (keys(%tic_defaults)) {
2316: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
2317: }
2318: $result .= "/>";
2319: return $result;
2320: }
2321:
2322: sub insert_ytics {
2323: my $result;
2324: $result .= "\n <ytics ";
2325: foreach my $attr (keys(%tic_defaults)) {
2326: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
2327: }
2328: $result .= "/>";
2329: return $result;
2330: }
2331:
2332: sub insert_key {
2333: my $result;
2334: $result .= "\n <key ";
2335: foreach my $attr (keys(%key_defaults)) {
2336: $result .= "\n $attr=\"$key_defaults{$attr}->{'default'}\"";
2337: }
2338: $result .= " />";
2339: return $result;
2340: }
2341:
2342: sub insert_axis{
2343: my $result;
2344: $result .= "\n <axis ";
2345: foreach my $attr (keys(%axis_defaults)) {
2346: $result .= "\n $attr=\"$axis_defaults{$attr}->{'default'}\"";
2347: }
2348: $result .= " />";
2349: return $result;
2350: }
2351:
2352: sub insert_title { return "\n <title></title>"; }
2353: sub insert_xlabel { return "\n <xlabel></xlabel>"; }
2354: sub insert_ylabel { return "\n <ylabel></ylabel>"; }
2355:
2356: sub insert_label {
2357: my $result;
2358: $result .= "\n <label ";
2359: foreach my $attr (keys(%label_defaults)) {
2360: $result .= "\n $attr=\"".
2361: $label_defaults{$attr}->{'default'}."\"";
2362: }
2363: $result .= "></label>";
2364: return $result;
2365: }
2366:
2367: sub insert_curve {
2368: my $result;
2369: $result .= "\n <curve ";
2370: foreach my $attr (keys(%curve_defaults)) {
2371: $result .= "\n $attr=\"".
2372: $curve_defaults{$attr}->{'default'}."\"";
2373: }
2374: $result .= " >";
2375: $result .= &insert_data().&insert_data()."\n </curve>";
2376: }
2377:
2378: sub insert_function {
2379: my $result;
2380: $result .= "\n <function></function>";
2381: return $result;
2382: }
2383:
2384: sub insert_data {
2385: my $result;
2386: $result .= "\n <data></data>";
2387: return $result;
2388: }
2389:
2390: ##----------------------------------------------------------------------
2391: 1;
2392: __END__
2393:
2394:
2395: =head1 NAME
2396:
2397: Apache::lonplot.pm
2398:
2399: =head1 SYNOPSIS
2400:
2401: XML-based plotter of graphs
2402:
2403: This is part of the LearningOnline Network with CAPA project
2404: described at http://www.lon-capa.org.
2405:
2406:
2407: =head1 SUBROUTINES (parsing and edit rendering)
2408:
2409: =over
2410:
2411: =item start_gnuplot()
2412:
2413: =item end_gnuplot()
2414:
2415: =item start_xtics()
2416:
2417: =item end_xtics()
2418:
2419: =item start_ytics()
2420:
2421: =item end_ytics()
2422:
2423: =item get_font()
2424:
2425: =item start_key()
2426:
2427: =item end_key()
2428:
2429: =item parse_label()
2430:
2431: =item replace_entities()
2432:
2433: =item start_title()
2434:
2435: =item end_title()
2436:
2437: =item start_xlabel()
2438:
2439: =item end_xlabel()
2440:
2441: =item start_ylabel()
2442:
2443: =item end_label()
2444:
2445: =item start_curve()
2446:
2447: =item end_curve()
2448:
2449: =item start_function()
2450:
2451: =item end_function()
2452:
2453: =item start_data()
2454:
2455: =item end_data()
2456:
2457: =item start_axis()
2458:
2459: =item end_axis
2460:
2461: =back
2462:
2463: =head1 SUBROUTINES (Utility)
2464:
2465: =over
2466:
2467: =item set_defaults()
2468:
2469: =item get_attributes()
2470:
2471: =item write_gnuplot_file()
2472:
2473: =item check_inputs()
2474:
2475: =item edit_attributes()
2476:
2477: =item fixup_colors()
2478:
2479: =back
2480:
2481: =head1 SUBROUTINES (Insertion functions for editing plots)
2482:
2483: =over
2484:
2485: =item insert_gnuplot()
2486:
2487: =item insert_tics()
2488:
2489: =item insert_xtics()
2490:
2491: =item insert_key()
2492:
2493: =item insert_axis()
2494:
2495: =item insert_title()
2496:
2497: =item insert_xlabel()
2498:
2499: =item insert_ylabel()
2500:
2501: =item insert_label()
2502:
2503: =item insert_curve()
2504:
2505: =item insert_function()
2506:
2507: =item insert_data()
2508:
2509: =back
2510:
2511: =cut
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