loncom/xml/lonplot.pm - view

File: [LON-CAPA] / loncom / xml / lonplot.pm
Revision 1.184: download - view: text, annotated - select for diffs
Sun Feb 2 20:12:31 2020 UTC (4 years, 3 months ago) by raeburn
Branches: MAIN
CVS tags: version_2_11_X, version_2_11_4_uiuc, version_2_11_4, version_2_11_3_uiuc, version_2_11_3_msu, version_2_11_3, HEAD

- Localize warnings for invalid color attributes in web view
- Eliminate "deprecated color option" warnings in web server log files for
  distros using gnuplot 4.6
- Support colors for border, grid and background (4.6 and later) if printing
  and
- Warnings about invalid color attributes tailored to editing context.
- Prefix to six character hexcolors (x for 4.4 and older; # for 4.6 and newer)
  updated automatically in color pickers in "Edit" mode ("Save" still needed),
  in Authring Space.

1: # The LearningOnline Network with CAPA 2: # Dynamic plot 3: # 4: # $Id: lonplot.pm,v 1.184 2020/02/02 20:12:31 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 LONCAPA; 44: 45: use vars qw/$weboutputformat $version $colorprefix/; 46: 47: 48: 49: BEGIN { 50: &Apache::lonxml::register('Apache::lonplot',('gnuplot')); 51: # 52: # Determine the version of GNUPLOT 53: $weboutputformat = 'gif'; 54: my $versionstring = `gnuplot --version 2>/dev/null`; 55: ($version) = ($versionstring =~ /^gnuplot ([\d.]+)/); 56: if ($version >= 4) { 57: $weboutputformat = 'png'; 58: } 59: $colorprefix = 'x'; 60: if ($version >= 4.6) { 61: $colorprefix = '#'; 62: } 63: } 64: 65: 66: =pod 67: 68: ## 69: ## Description of data structures: 70: ## 71: ## %plot %key %axis 72: ## -------------------------- 73: ## height title color 74: ## width box xmin 75: ## bgcolor pos xmax 76: ## fgcolor ymin 77: ## transparent ymax 78: ## grid 79: ## border 80: ## font 81: ## align 82: ## 83: ## @labels: $labels[$i] = \%label 84: ## %label: text, xpos, ypos, justify, rotate, zlayer 85: ## 86: ## @curves: $curves[$i] = \%curve 87: ## %curve: name, linestyle, ( function | data ) 88: ## 89: ## $curves[$i]->{'data'} = [ [x1,x2,x3,x4], 90: ## [y1,y2,y3,y4] ] 91: ## 92: 93: ################################################################### 94: ## ## 95: ## Tests used in checking the validitity of input ## 96: ## ## 97: ################################################################### 98: 99: =cut 100: 101: my $max_str_len = 50; # if a label, title, xlabel, or ylabel text 102: # is longer than this, it will be truncated. 103: 104: my %linetypes = # For png use these linetypes. 105: ( 106: solid => 1, 107: dashed => 0 108: ); 109: my %ps_linetypes = # For ps the line types are different! 110: ( 111: solid => 1, 112: dashed => 7 113: ); 114: 115: my %linestyles = 116: ( 117: lines => 2, # Maybe this will be used in the future 118: linespoints => 2, # to check on whether or not they have 119: dots => 2, # supplied enough <data></data> fields 120: points => 2, # to use the given line style. But for 121: steps => 2, # now there are more important things 122: fsteps => 2, # for me to deal with. 123: histeps => 2, 124: errorbars => 3, 125: xerrorbars => [3,4], 126: yerrorbars => [3,4], 127: xyerrorbars => [4,6], 128: boxes => 3, 129: filledcurves => 2, 130: vector => 4 131: ); 132: 133: my $int_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^\d+$/}; 134: my $real_test = 135: sub {$_[0]=~s/\s+//g;$_[0]=~/^[+-]?\d*\.?\d*([eE][+-]\d+)?$/}; 136: my $pos_real_test = 137: sub {$_[0]=~s/\s+//g;$_[0]=~/^[+]?\d*\.?\d*([eE][+-]\d+)?$/}; 138: my $color_test; 139: if ($version < 4.6) { 140: $color_test = sub {$_[0]=~s/\s+//g;$_[0]=~s/^\#/x/;$_[0]=~s/^x+/x/;$_[0]=~/^x[\da-fA-F]{6}$/}; 141: } else { 142: $color_test = sub {$_[0]=~s/\s+//g;$_[0]=~s/^x/#/;$_[0]=~s/^\#+/#/;$_[0]=~/^\#[\da-fA-F]{6}$/}; 143: } 144: my $onoff_test = sub {$_[0]=~/^(on|off)$/}; 145: my $key_pos_test = sub {$_[0]=~/^(top|bottom|right|left|outside|below| )+$/}; 146: my $sml_test = sub {$_[0]=~/^(\d+|small|medium|large)$/}; 147: my $linestyle_test = sub {exists($linestyles{$_[0]})}; 148: my $words_test = sub {$_[0]=~s/\s+/ /g;$_[0]=~/^([\w~!\@\#\$\%^&\*-=_\+\[\]\{\}:\;\'<>,\.\/\?\\]+ ?)+$/}; 149: 150: my $arrowhead_test = sub{$_[0]=~/^(nohead|head|heads| )+$/}; 151: my $arrowstyle_test= sub{$_[0]=~/^(filled|empty|nofilled)+$/}; 152: my $degree_test = sub{&$pos_real_test($_[0]) && ($_[0] <= 360.0)}; 153: 154: ################################################################### 155: ## ## 156: ## Attribute metadata ## 157: ## ## 158: ################################################################### 159: my @gnuplot_edit_order = 160: qw/alttag bgcolor fgcolor height width texwidth fontface font texfont 161: transparent grid samples 162: border align plotcolor plottype gridtype lmargin rmargin 163: tmargin bmargin major_ticscale minor_ticscale boxwidth gridlayer fillstyle 164: pattern solid/; 165: 166: my $margin_choices = ['default',0..20]; 167: 168: my %gnuplot_defaults = 169: ( 170: alttag => { 171: default => 'dynamically generated plot', 172: test => $words_test, 173: description => 'Brief description of the plot', 174: edit_type => 'entry', 175: size => '40' 176: }, 177: height => { 178: default => 300, 179: test => $int_test, 180: description => 'Height of image (pixels)', 181: edit_type => 'entry', 182: size => '10' 183: }, 184: width => { 185: default => 400, 186: test => $int_test, 187: description => 'Width of image (pixels)', 188: edit_type => 'entry', 189: size => '10' 190: }, 191: bgcolor => { 192: default => $colorprefix.'ffffff', 193: test => $color_test, 194: description => 'Background color of image ('.$colorprefix.'ffffff)', 195: edit_type => 'entry', 196: size => '10', 197: class => 'colorchooser' 198: }, 199: fgcolor => { 200: default => $colorprefix.'000000', 201: test => $color_test, 202: description => 'Foreground color of image ('.$colorprefix.'000000)', 203: edit_type => 'entry', 204: size => '10', 205: class => 'colorchooser' 206: }, 207: transparent => { 208: default => 'off', 209: test => $onoff_test, 210: description => 'Transparent image', 211: edit_type => 'onoff' 212: }, 213: grid => { 214: default => 'on', 215: test => $onoff_test, 216: description => 'Display grid', 217: edit_type => 'onoff' 218: }, 219: gridlayer => { 220: default => 'off', 221: test => $onoff_test, 222: description => 'Display grid front layer over filled boxes or filled curves', 223: edit_type => 'onoff' 224: }, 225: box_border => { 226: default => 'noborder', 227: test => sub {$_[0]=~/^(noborder|border)$/}, 228: description => 'Draw border for boxes', 229: edit_type => 'choice', 230: choices => ['border','noborder'] 231: }, 232: border => { 233: default => 'on', 234: test => $onoff_test, 235: description => 'Draw border around plot', 236: edit_type => 'onoff' 237: }, 238: font => { 239: default => '9', 240: test => $sml_test, 241: description => 'Font size to use in web output (pts)', 242: edit_type => 'choice', 243: choices => [['5','5 (small)'],'6','7','8',['9','9 (medium)'],'10',['11','11 (large)'],'12','15'] 244: }, 245: fontface => { 246: default => 'sans-serif', 247: test => sub {$_[0]=~/^(sans-serif|serif|classic)$/}, 248: description => 'Type of font to use', 249: edit_type => 'choice', 250: choices => ['sans-serif','serif', 'classic'] 251: }, 252: samples => { 253: default => '100', 254: test => $int_test, 255: description => 'Number of samples for non-data plots', 256: edit_type => 'choice', 257: choices => ['100','200','500','1000','2000','5000'] 258: }, 259: align => { 260: default => 'middle', 261: test => sub {$_[0]=~/^(left|right|middle|center)$/}, 262: description => 'Alignment for image in HTML', 263: edit_type => 'choice', 264: choices => ['left','right','middle','center'] 265: }, 266: texwidth => { 267: default => '93', 268: test => $int_test, 269: description => 'Width of plot when printed (mm)', 270: edit_type => 'entry', 271: size => '5' 272: }, 273: texfont => { 274: default => '22', 275: test => $int_test, 276: description => 'Font size to use in TeX output (pts):', 277: edit_type => 'choice', 278: choices => [qw/8 10 12 14 16 18 20 22 24 26 28 30 32 34 36/], 279: }, 280: plotcolor => { 281: default => 'monochrome', 282: test => sub {$_[0]=~/^(monochrome|color|colour)$/}, 283: description => 'Color setting for printing:', 284: edit_type => 'choice', 285: choices => [qw/monochrome color colour/], 286: }, 287: pattern => { 288: default => '', 289: test => $int_test, 290: description => 'Pattern value for boxes:', 291: edit_type => 'choice', 292: choices => [0,1,2,3,4,5,6] 293: }, 294: solid => { 295: default => 0, 296: test => $real_test, 297: description => 'The density of fill style for boxes', 298: edit_type => 'entry', 299: size => '5' 300: }, 301: fillstyle => { 302: default => 'empty', 303: test => sub {$_[0]=~/^(empty|solid|pattern)$/}, 304: description => 'Filled style for boxes:', 305: edit_type => 'choice', 306: choices => ['empty','solid','pattern'] 307: }, 308: plottype => { 309: default => 'Cartesian', 310: test => sub {$_[0]=~/^(Polar|Cartesian)$/}, 311: description => 'Plot type:', 312: edit_type => 'choice', 313: choices => ['Cartesian','Polar'] 314: }, 315: gridtype => { 316: default => 'Cartesian', 317: test => sub {$_[0]=~/^(Polar|Cartesian|Linear-Log|Log-Linear|Log-Log)$/}, 318: description => 'Grid type:', 319: edit_type => 'choice', 320: choices => ['Cartesian','Polar','Linear-Log','Log-Linear','Log-Log'] 321: }, 322: lmargin => { 323: default => 'default', 324: test => sub {$_[0]=~/^(default|\d+)$/}, 325: description => 'Left margin width (pts):', 326: edit_type => 'choice', 327: choices => $margin_choices, 328: }, 329: rmargin => { 330: default => 'default', 331: test => sub {$_[0]=~/^(default|\d+)$/}, 332: description => 'Right margin width (pts):', 333: edit_type => 'choice', 334: choices => $margin_choices, 335: }, 336: tmargin => { 337: default => 'default', 338: test => sub {$_[0]=~/^(default|\d+)$/}, 339: description => 'Top margin width (pts):', 340: edit_type => 'choice', 341: choices => $margin_choices, 342: }, 343: bmargin => { 344: default => 'default', 345: test => sub {$_[0]=~/^(default|\d+)$/}, 346: description => 'Bottom margin width (pts):', 347: edit_type => 'choice', 348: choices => $margin_choices, 349: }, 350: boxwidth => { 351: default => '', 352: test => $real_test, 353: description => 'Width of boxes, default is auto', 354: edit_type => 'entry', 355: size => '5' 356: }, 357: major_ticscale => { 358: default => '1', 359: test => $real_test, 360: description => 'Size of major tic marks (plot coordinates)', 361: edit_type => 'entry', 362: size => '5' 363: }, 364: minor_ticscale => { 365: default => '0.5', 366: test => $real_test, 367: description => 'Size of minor tic mark (plot coordinates)', 368: edit_type => 'entry', 369: size => '5' 370: }, 371: ); 372: 373: 374: my %key_defaults = 375: ( 376: title => { 377: default => '', 378: test => $words_test, 379: description => 'Title of key', 380: edit_type => 'entry', 381: size => '40' 382: }, 383: box => { 384: default => 'off', 385: test => $onoff_test, 386: description => 'Draw a box around the key?', 387: edit_type => 'onoff' 388: }, 389: pos => { 390: default => 'top right', 391: test => $key_pos_test, 392: description => 'Position of the key on the plot', 393: edit_type => 'choice', 394: choices => ['top left','top right','bottom left','bottom right', 395: 'outside','below'] 396: } 397: ); 398: 399: my %label_defaults = 400: ( 401: xpos => { 402: default => 0, 403: test => $real_test, 404: description => 'X position of label (graph coordinates)', 405: edit_type => 'entry', 406: size => '10' 407: }, 408: ypos => { 409: default => 0, 410: test => $real_test, 411: description => 'Y position of label (graph coordinates)', 412: edit_type => 'entry', 413: size => '10' 414: }, 415: justify => { 416: default => 'left', 417: test => sub {$_[0]=~/^(left|right|center)$/}, 418: description => 'justification of the label text on the plot', 419: edit_type => 'choice', 420: choices => ['left','right','center'] 421: }, 422: rotate => { 423: default => 0, 424: test => $real_test, 425: description => 'Rotation of label (degrees)', 426: edit_type => 'entry', 427: size => '10', 428: }, 429: zlayer => { 430: default => '', 431: test => sub {$_[0]=~/^(front|back)$/}, 432: description => 'Z position of label', 433: edit_type => 'choice', 434: choices => ['front','back'], 435: }, 436: ); 437: 438: my @tic_edit_order = ('location','mirror','start','increment','end', 439: 'minorfreq'); 440: my %tic_defaults = 441: ( 442: location => { 443: default => 'border', 444: test => sub {$_[0]=~/^(border|axis)$/}, 445: description => 'Location of major tic marks', 446: edit_type => 'choice', 447: choices => ['border','axis'] 448: }, 449: mirror => { 450: default => 'on', 451: test => $onoff_test, 452: description => 'Mirror tics on opposite axis?', 453: edit_type => 'onoff' 454: }, 455: start => { 456: default => '-10.0', 457: test => $real_test, 458: description => 'Start major tics at', 459: edit_type => 'entry', 460: size => '10' 461: }, 462: increment => { 463: default => '1.0', 464: test => $real_test, 465: description => 'Place a major tic every', 466: edit_type => 'entry', 467: size => '10' 468: }, 469: end => { 470: default => ' 10.0', 471: test => $real_test, 472: description => 'Stop major tics at ', 473: edit_type => 'entry', 474: size => '10' 475: }, 476: minorfreq => { 477: default => '0', 478: test => $int_test, 479: description => 'Number of minor tics per major tic mark', 480: edit_type => 'entry', 481: size => '10' 482: }, 483: rotate => { 484: default => 'off', 485: test => $onoff_test, 486: description => 'Rotate tic label by 90 degrees if on', 487: edit_type => 'onoff' 488: } 489: ); 490: 491: my @axis_edit_order = ('color','xmin','xmax','ymin','ymax','xformat', 'yformat', 'xzero', 'yzero'); 492: my %axis_defaults = 493: ( 494: color => { 495: default => $colorprefix.'000000', 496: test => $color_test, 497: description => 'Color of grid lines ('.$colorprefix.'000000)', 498: edit_type => 'entry', 499: size => '10', 500: class => 'colorchooser' 501: }, 502: xmin => { 503: default => '-10.0', 504: test => $real_test, 505: description => 'Minimum x-value shown in plot', 506: edit_type => 'entry', 507: size => '10' 508: }, 509: xmax => { 510: default => ' 10.0', 511: test => $real_test, 512: description => 'Maximum x-value shown in plot', 513: edit_type => 'entry', 514: size => '10' 515: }, 516: ymin => { 517: default => '-10.0', 518: test => $real_test, 519: description => 'Minimum y-value shown in plot', 520: edit_type => 'entry', 521: size => '10' 522: }, 523: ymax => { 524: default => ' 10.0', 525: test => $real_test, 526: description => 'Maximum y-value shown in plot', 527: edit_type => 'entry', 528: size => '10' 529: }, 530: xformat => { 531: default => 'on', 532: test => sub {$_[0]=~/^(on|off|\d+(f|F|e|E|P(|\s*[Pp][Ii])))$/}, 533: description => 'X-axis number formatting', 534: edit_type => 'choice', 535: choices => ['on', 'off', '2e', '2f'], 536: }, 537: yformat => { 538: default => 'on', 539: test => sub {$_[0]=~/^(on|off|\d+(f|F|e|E|P(|\s*[Pp][Ii])))$/}, 540: description => 'Y-axis number formatting', 541: edit_type => 'choice', 542: choices => ['on', 'off', '2e', '2f'], 543: }, 544: 545: xzero => { 546: default => 'off', 547: test => sub {$_[0]=~/^(off|line|thick-line|dotted)$/}, 548: description => 'Show x-zero (y=0) axis', 549: edit_type => 'choice', 550: choices => ['off', 'line', 'thick-line', 'dotted'], 551: }, 552: 553: yzero => { 554: default => 'off', 555: test => sub {$_[0]=~/^(off|line|thick-line|dotted)$/}, 556: description => 'Show y-zero (x=0) axis', 557: edit_type => 'choice', 558: choices => ['off', 'line', 'thick-line', 'dotted'], 559: }, 560: ); 561: 562: 563: my @curve_edit_order = ('color','name','linestyle','linewidth','linetype', 564: 'pointtype','pointsize','limit', 'arrowhead', 'arrowstyle', 565: 'arrowlength', 'arrowangle', 'arrowbackangle' 566: ); 567: 568: my %curve_defaults = 569: ( 570: color => { 571: default => $colorprefix.'000000', 572: test => $color_test, 573: description => 'Color of curve ('.$colorprefix.'000000)', 574: edit_type => 'entry', 575: size => '10', 576: class => 'colorchooser' 577: }, 578: name => { 579: default => '', 580: test => $words_test, 581: description => 'Name of curve to appear in key', 582: edit_type => 'entry', 583: size => '20' 584: }, 585: linestyle => { 586: default => 'lines', 587: test => $linestyle_test, 588: description => 'Plot with:', 589: edit_type => 'choice', 590: choices => [keys(%linestyles)] 591: }, 592: linewidth => { 593: default => 1, 594: test => $int_test, 595: description => 'Line width (may not apply to all plot styles)', 596: edit_type => 'choice', 597: choices => [1,2,3,4,5,6,7,8,9,10] 598: }, 599: linetype => { 600: default => 'solid', 601: test => sub {$_[0]=~/^(solid|dashed)$/}, 602: description => 'Line type (may not apply to all plot styles)', 603: edit_type => 'choice', 604: choices => ['solid', 'dashed'] 605: }, 606: pointsize => { 607: default => 1, 608: test => $pos_real_test, 609: description => 'Point size (may not apply to all plot styles)', 610: edit_type => 'entry', 611: size => '5' 612: }, 613: pointtype => { 614: default => 1, 615: test => $int_test, 616: description => 'Point type (may not apply to all plot styles)', 617: edit_type => 'choice', 618: choices => [0,1,2,3,4,5,6] 619: }, 620: limit => { 621: default => 'closed', 622: test => sub {$_[0]=~/^(above|below|closed|x1|x2|y1|y2)$/}, 623: description => 'Point to fill -- for filledcurves', 624: edit_type => 'choice', 625: choices => ['above', 'below', 'closed','x1','x2','y1','y2'] 626: }, 627: arrowhead => { 628: default => 'head', 629: test => $arrowhead_test, 630: description => 'Vector arrow head type', 631: edit_type => 'choice', 632: choices => ['nohead', 'head', 'heads'] 633: }, 634: arrowstyle => { 635: default => 'filled', 636: test => $arrowstyle_test, 637: description => 'Vector arrow head style', 638: edit_type => 'choice', 639: choices => ['filled', 'empty', 'nofilled'] 640: }, 641: arrowlength => { 642: default => 0.02, 643: test => $pos_real_test, 644: description => "Length of vector arrow (only applies to vector plots)", 645: edit_type => 'entry', 646: size => '5' 647: }, 648: arrowangle => { 649: default => 10.0, 650: test => $degree_test, 651: description => 'Angle of arrow branches to arrow body (only applies to vector plots)', 652: edit_type => 'entry', 653: size => '5' 654: }, 655: 656: arrowbackangle => { 657: default => 90.0, 658: test => $degree_test, 659: descripton => 'Angle of arrow back lines to branches.', 660: edit_type => 'entry', 661: size => '5' 662: } 663: 664: ); 665: 666: ################################################################### 667: ## ## 668: ## parsing and edit rendering ## 669: ## ## 670: ################################################################### 671: 672: undef %Apache::lonplot::plot; 673: my (%key,%axis,$title,$xlabel,$ylabel,@labels,@curves,%xtics,%ytics); 674: 675: my $current_tics; # Reference to the current tick hash 676: 677: sub start_gnuplot { 678: undef(%Apache::lonplot::plot); undef(%key); undef(%axis); 679: undef($title); undef($xlabel); undef($ylabel); 680: undef(@labels); undef(@curves); 681: undef(%xtics); undef(%ytics); 682: # 683: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 684: my $result=''; 685: 686: &Apache::lonxml::register('Apache::lonplot', 687: ('title','xlabel','ylabel','key','axis','label','curve', 688: 'xtics','ytics')); 689: push (@Apache::lonxml::namespace,'lonplot'); 690: if ($target eq 'web' || $target eq 'tex') { 691: &get_attributes(\%Apache::lonplot::plot,\%gnuplot_defaults,$parstack,$safeeval, 692: $tagstack->[-1]); 693: } elsif ($target eq 'edit') { 694: &fixup_colors($token,['bgcolor','fgcolor']); 695: $result .= &Apache::edit::tag_start($target,$token,'GnuPlot'); 696: $result .= &edit_attributes($target,$token,\%gnuplot_defaults, 697: \@gnuplot_edit_order) 698: .&Apache::edit::end_row() 699: .&Apache::edit::start_spanning_row(); 700: } elsif ($target eq 'modified') { 701: my $constructtag=&Apache::edit::get_new_args 702: ($token,$parstack,$safeeval,keys(%gnuplot_defaults)); 703: my $fixed = &fixup_colors($token,['bgcolor','fgcolor']); 704: if ($constructtag || $fixed) { 705: $result = &Apache::edit::rebuild_tag($token); 706: } 707: } 708: return $result; 709: } 710: 711: sub end_gnuplot { 712: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 713: pop @Apache::lonxml::namespace; 714: &Apache::lonxml::deregister('Apache::lonplot', 715: ('title','xlabel','ylabel','key','axis','label','curve')); 716: my $result = ''; 717: my $randnumber; 718: my $tmpdir =LONCAPA::tempdir(); # Where temporary files live: 719: 720: # need to call rand everytime start_script would evaluate, as the 721: # safe space rand number generator and the global rand generator 722: # are not separate 723: if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' || 724: $target eq 'answer') { 725: $randnumber=int(rand(1000)); 726: } 727: if ($target eq 'web' || $target eq 'tex') { 728: &check_inputs(); # Make sure we have all the data we need 729: ## 730: ## Determine filename 731: my $filename = $env{'user.name'}.'_'.$env{'user.domain'}. 732: '_'.time.'_'.$$.$randnumber.'_plot'; 733: ## Write the plot description to the file 734: &write_gnuplot_file($tmpdir,$filename,$target); 735: $filename = &escape($filename); 736: ## return image tag for the plot 737: if ($target eq 'web') { 738: my $srcatt = "src=\"/cgi-bin/plot.$weboutputformat?file=$filename.data\""; 739: my $widthatt = "width=\"$Apache::lonplot::plot{'width'}\""; 740: my $heightatt = "height=\"$Apache::lonplot::plot{'height'}\""; 741: my $alignatt = "align=\"$Apache::lonplot::plot{'align'}\""; 742: my $altatt = "alt=\"$Apache::lonplot::plot{'alttag'}\""; 743: if ($Apache::lonplot::plot{'align'} eq 'center') { 744: $result .= '<div style="text-align:center">'. 745: "<img $srcatt $widthatt $heightatt $altatt>". 746: "</div>\n"; 747: 748: } else { 749: $result .= "<img $srcatt $widthatt $heightatt $alignatt $altatt>"; 750: } 751: } elsif ($target eq 'tex') { 752: &Apache::lonxml::debug(" gnuplot wid = $Apache::lonplot::plot{'width'}"); 753: &Apache::lonxml::debug(" gnuplot ht = $Apache::lonplot::plot{'height'}"); 754: #might be inside the safe space, register the URL for later 755: &Apache::lonxml::register_ssi("/cgi-bin/plot.gif?file=$filename.data&output=eps"); 756: $result = "%DYNAMICIMAGE:$Apache::lonplot::plot{'width'}:$Apache::lonplot::plot{'height'}:$Apache::lonplot::plot{'texwidth'}\n"; 757: $result .= '\graphicspath{{'.$tmpdir.'}}'."\n"; 758: if ($Apache::lonplot::plot{'align'} eq 'center') { 759: $result .= '\begin{center}'; 760: } 761: $result .= '\includegraphics[width='.$Apache::lonplot::plot{'texwidth'}.' mm]{'.&unescape($filename).'.eps}'; 762: if ($Apache::lonplot::plot{'align'} eq 'center') { 763: $result .= '\end{center}'; 764: } 765: } 766: } elsif ($target eq 'edit') { 767: $result.=&Apache::edit::tag_end($target,$token); 768: } 769: return $result; 770: } 771: 772: 773: ##--------------------------------------------------------------- xtics 774: sub start_xtics { 775: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 776: my $result=''; 777: if ($target eq 'web' || $target eq 'tex') { 778: &get_attributes(\%xtics,\%tic_defaults,$parstack,$safeeval, 779: $tagstack->[-1]); 780: $current_tics = \%xtics; 781: &Apache::lonxml::register('Apache::lonplot', 'tic'); 782: } elsif ($target eq 'edit') { 783: $result .= &Apache::edit::tag_start($target,$token,'xtics'); 784: $result .= &edit_attributes($target,$token,\%tic_defaults, 785: \@tic_edit_order); 786: } elsif ($target eq 'modified') { 787: my $constructtag=&Apache::edit::get_new_args 788: ($token,$parstack,$safeeval,keys(%tic_defaults)); 789: if ($constructtag) { 790: $result = &Apache::edit::rebuild_tag($token); 791: } 792: } 793: return $result; 794: } 795: 796: sub end_xtics { 797: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 798: my $result = ''; 799: if ($target eq 'web' || $target eq 'tex') { 800: &Apache::lonxml::deregister('Apache::lonplot', 'tic'); 801: } elsif ($target eq 'edit') { 802: $result.=&Apache::edit::tag_end($target,$token); 803: } 804: return $result; 805: } 806: 807: ##--------------------------------------------------------------- ytics 808: sub start_ytics { 809: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 810: my $result=''; 811: if ($target eq 'web' || $target eq 'tex') { 812: &get_attributes(\%ytics,\%tic_defaults,$parstack,$safeeval, 813: $tagstack->[-1]); 814: $current_tics = \%ytics; 815: &Apache::lonxml::register('Apache::lonplot', 'tic'); 816: } elsif ($target eq 'edit') { 817: $result .= &Apache::edit::tag_start($target,$token,'ytics'); 818: $result .= &edit_attributes($target,$token,\%tic_defaults, 819: \@tic_edit_order); 820: } elsif ($target eq 'modified') { 821: my $constructtag=&Apache::edit::get_new_args 822: ($token,$parstack,$safeeval,keys(%tic_defaults)); 823: if ($constructtag) { 824: $result = &Apache::edit::rebuild_tag($token); 825: } 826: } 827: return $result; 828: } 829: 830: sub end_ytics { 831: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 832: my $result = ''; 833: if ($target eq 'web' || $target eq 'tex') { 834: &Apache::lonxml::deregister('Apache::lonplot', 'tic'); 835: } elsif ($target eq 'edit') { 836: $result.=&Apache::edit::tag_end($target,$token); 837: } 838: return $result; 839: } 840: 841: 842: ##---------------------------------------------------------------- 843: # 844: # Tic handling: 845: # The <tic> tag allows users to specify exact Tic positions and labels 846: # for each axis. In this version we only support level 0 tics (major tic). 847: # Each tic has associated with it a position and a label 848: # $current_tics is a reference to the current tick description hash. 849: # We add elements to an array in that has: ticspecs whose elements 850: # are 'pos' - the tick position and 'label' - the tic label. 851: # 852: 853: 854: sub start_tic { 855: my ($target, $token, $tagstack, $parstack, $parser, $safeeval, $style) = @_; 856: 857: my $result = ''; 858: if ($target eq 'web' || $target eq 'tex') { 859: my $tic_location = &Apache::lonxml::get_param('location', $parstack, $safeeval); 860: my $tic_label = &Apache::lonxml::get_all_text('/tic', $parser); 861: 862: # Tic location must e a real: 863: 864: if (!&$real_test($tic_location)) { 865: &Apache::lonxml::warning("Tic location: $tic_location must be a real number"); 866: } else { 867: 868: if (!defined $current_tics->{'ticspecs'}) { 869: $current_tics->{'ticspecs'} = []; 870: } 871: my $ticspecs = $current_tics->{'ticspecs'}; 872: push (@$ticspecs, {'pos' => $tic_location, 'label' => $tic_label}); 873: } 874: } 875: 876: return $result; 877: } 878: 879: sub end_tic { 880: return ''; 881: } 882: 883: ##-----------------------------------------------------------------font 884: my %font_properties = 885: ( 886: 'classic' => { 887: face => 'classic', 888: file => 'DejaVuSansMono-Bold', 889: printname => 'Helvetica', 890: tex_no_file => 1, 891: }, 892: 'sans-serif' => { 893: face => 'sans-serif', 894: file => 'DejaVuSans', 895: printname => 'DejaVuSans', 896: }, 897: 'serif' => { 898: face => 'serif', 899: file => 'DejaVuSerif', 900: printname => 'DejaVuSerif', 901: }, 902: ); 903: 904: sub get_font { 905: my ($target) = @_; 906: my ($size, $selected_font); 907: 908: if ( $Apache::lonplot::plot{'font'} =~ /^(small|medium|large)/) { 909: $selected_font = $font_properties{'classic'}; 910: if ( $Apache::lonplot::plot{'font'} eq 'small') { 911: $size = '5'; 912: } elsif ( $Apache::lonplot::plot{'font'} eq 'medium') { 913: $size = '9'; 914: } elsif ( $Apache::lonplot::plot{'font'} eq 'large') { 915: $size = '11'; 916: } else { 917: $size = '9'; 918: } 919: } else { 920: $size = $Apache::lonplot::plot{'font'}; 921: $selected_font = $font_properties{$Apache::lonplot::plot{'fontface'}}; 922: } 923: if ($target eq 'tex' && defined($Apache::lonplot::plot{'texfont'})) { 924: # $selected_font = $font_properties{'classic'}; 925: $size = $Apache::lonplot::plot{'texfont'}; 926: } 927: return ($size, $selected_font); 928: } 929: 930: ##----------------------------------------------------------------- key 931: sub start_key { 932: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 933: my $result=''; 934: if ($target eq 'web' || $target eq 'tex') { 935: &get_attributes(\%key,\%key_defaults,$parstack,$safeeval, 936: $tagstack->[-1]); 937: } elsif ($target eq 'edit') { 938: $result .= &Apache::edit::tag_start($target,$token,'Plot Key'); 939: $result .= &edit_attributes($target,$token,\%key_defaults); 940: } elsif ($target eq 'modified') { 941: my $constructtag=&Apache::edit::get_new_args 942: ($token,$parstack,$safeeval,keys(%key_defaults)); 943: if ($constructtag) { 944: $result = &Apache::edit::rebuild_tag($token); 945: } 946: } 947: return $result; 948: } 949: 950: sub end_key { 951: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 952: my $result = ''; 953: if ($target eq 'web' || $target eq 'tex') { 954: } elsif ($target eq 'edit') { 955: $result.=&Apache::edit::tag_end($target,$token); 956: } 957: return $result; 958: } 959: 960: sub parse_label { 961: my ($target,$text) = @_; 962: my $parser=HTML::LCParser->new(\$text); 963: my $result; 964: while (my $token=$parser->get_token) { 965: if ($token->[0] eq 'S') { 966: if ($token->[1] eq 'sub') { 967: $result .= '_{'; 968: } elsif ($token->[1] eq 'sup') { 969: $result .= '^{'; 970: } else { 971: $result .= $token->[4]; 972: } 973: } elsif ($token->[0] eq 'E') { 974: if ($token->[1] eq 'sub' 975: || $token->[1] eq 'sup') { 976: $result .= '}'; 977: } else { 978: $result .= $token->[2]; 979: } 980: } elsif ($token->[0] eq 'T') { 981: $result .= &replace_entities($target,$token->[1]); 982: } 983: } 984: return $result; 985: } 986: 987: # 988: # Note that there are severe restrictions on font selection in the 989: # ps driver now. later in life Gnuplot is supposed to support 990: # utf-8 fonts in the posts script driver. When this happens, 991: # the tex entries with comments that include the word <FIX> 992: # should be changed to print the correct glyphs rather than some 993: # approximation or fallback of what is intended. 994: 995: my %lookup = 996: ( # Greek alphabet: 997: 998: '(Alpha|#913)' => {'tex' => '{/Symbol A}', 'web' => "\x{391}"}, 999: '(Beta|#914)' => {'tex' => '{/Symbol B}', 'web' => "\x{392}"}, 1000: '(Chi|#935)' => {'tex' => '{/Symbol C}', 'web' => "\x{3A7}"}, 1001: '(Delta|#916)' => {'tex' => '{/Symbol D}', 'web' => "\x{394}"}, 1002: '(Epsilon|#917)' => {'tex' => '{/Symbol E}', 'web' => "\x{395}"}, 1003: '(Phi|#934)' => {'tex' => '{/Symbol F}', 'web' => "\x{3A6}"}, 1004: '(Gamma|#915)' => {'tex' => '{/Symbol G}', 'web' => "\x{393}"}, 1005: '(Eta|#919)' => {'tex' => '{/Symbol H}', 'web' => "\x{397}"}, 1006: '(Iota|#921)' => {'tex' => '{/Symbol I}', 'web' => "\x{399}"}, 1007: '(Kappa|#922)' => {'tex' => '{/Symbol K}', 'web' => "\x{39A}"}, 1008: '(Lambda|#923)' => {'tex' => '{/Symbol L}', 'web' => "\x{39B}"}, 1009: '(Mu|#924)' => {'tex' => '{/Symbol M}', 'web' => "\x{39C}"}, 1010: '(Nu|#925)' => {'tex' => '{/Symbol N}', 'web' => "\x{39D}"}, 1011: '(Omicron|#927)' => {'tex' => '{/Symbol O}', 'web' => "\x{39F}"}, 1012: '(Pi|#928)' => {'tex' => '{/Symbol P}', 'web' => "\x{3A0}"}, 1013: '(Theta|#920)' => {'tex' => '{/Symbol Q}', 'web' => "\x{398}"}, 1014: '(Rho|#929)' => {'tex' => '{/Symbol R}', 'web' => "\x{3A1}"}, 1015: '(Sigma|#931)' => {'tex' => '{/Symbol S}', 'web' => "\x{3A3}"}, 1016: '(Tau|#932)' => {'tex' => '{/Symbol T}', 'web' => "\x{3A4}"}, 1017: '(Upsilon|#933)' => {'tex' => '{/Symbol U}', 'web' => "\x{3A5}"}, 1018: '(Omega|#937)' => {'tex' => '{/Symbol W}', 'web' => "\x{3A9}"}, 1019: '(Xi|#926)' => {'tex' => '{/Symbol X}', 'web' => "\x{39E}"}, 1020: '(Psi|#936)' => {'tex' => '{/Symbol Y}', 'web' => "\x{3A8}"}, 1021: '(Zeta|#918)' => {'tex' => '{/Symbol Z}', 'web' => "\x{396}"}, 1022: '(alpha|#945)' => {'tex' => '{/Symbol a}', 'web' => "\x{3B1}"}, 1023: '(beta|#946)' => {'tex' => '{/Symbol b}', 'web' => "\x{3B2}"}, 1024: '(chi|#967)' => {'tex' => '{/Symbol c}', 'web' => "\x{3C7}"}, 1025: '(delta|#948)' => {'tex' => '{/Symbol d}', 'web' => "\x{3B4}"}, 1026: '(epsilon|#949)' => {'tex' => '{/Symbol e}', 'web' => "\x{3B5}"}, 1027: '(phi|#966)' => {'tex' => '{/Symbol f}', 'web' => "\x{3C6}"}, 1028: '(gamma|#947)' => {'tex' => '{/Symbol g}', 'web' => "\x{3B3}"}, 1029: '(eta|#951)' => {'tex' => '{/Symbol h}', 'web' => "\x{3B7}"}, 1030: '(iota|#953)' => {'tex' => '{/Symbol i}', 'web' => "\x{3B9}"}, 1031: '(kappa|#954)' => {'tex' => '{/Symbol k}', 'web' => "\x{3BA}"}, 1032: '(lambda|#955)' => {'tex' => '{/Symbol k}', 'web' => "\x{3BB}"}, 1033: '(mu|#956)' => {'tex' => '{/Symbol m}', 'web' => "\x{3BC}"}, 1034: '(nu|#957)' => {'tex' => '{/Symbol n}', 'web' => "\x{3BD}"}, 1035: '(omicron|#959)' => {'tex' => '{/Symbol o}', 'web' => "\x{3BF}"}, 1036: '(pi|#960)' => {'tex' => '{/Symbol p}', 'web' => "\x{3C0}"}, 1037: '(theta|#952)' => {'tex' => '{/Symbol q}', 'web' => "\x{3B8}"}, 1038: '(rho|#961)' => {'tex' => '{/Symbol r}', 'web' => "\x{3C1}"}, 1039: '(sigma|#963)' => {'tex' => '{/Symbol s}', 'web' => "\x{3C3}"}, 1040: '(tau|#964)' => {'tex' => '{/Symbol t}', 'web' => "\x{3C4}"}, 1041: '(upsilon|#965)' => {'tex' => '{/Symbol u}', 'web' => "\x{3C5}"}, 1042: '(omega|#969)' => {'tex' => '{/Symbol w}', 'web' => "\x{3C9}"}, 1043: '(xi|#958)' => {'tex' => '{/Symbol x}', 'web' => "\x{3BE}"}, 1044: '(psi|#968)' => {'tex' => '{/Symbol y}', 'web' => "\x{3C8}"}, 1045: '(zeta|#950)' => {'tex' => '{/Symbol z}', 'web' => "\x{3B6}"}, 1046: '(thetasym|#977)' => {'tex' => '{/Symbol \165}', 'web' => "\x{3d1}"}, 1047: '(upsih|#978)' => {'tex' => '{/Symbol \241}', 'web' => "\x{3d2}"}, 1048: '(piv|#982)' => {'tex' => '{/Symbol \166}', 'web' => "\x{3d6}"}, 1049: 1050: 1051: # Punctuation: 1052: 1053: '(quot|#034)' => {'tex' => '\42', 'web' => '\42'}, 1054: '(amp|#038)' => {'tex' => '\46', 'web' => '\46'}, 1055: '(lt|#060)' => {'tex' => '\74', 'web' => '\74'}, 1056: '(gt|#062)' => {'tex' => '\76', 'web' => '\76'}, 1057: '#131' => {'tex' => '{/Symbol \246}', 'web' => "\x{192}"}, 1058: '#132' => {'tex' => '{/Text \271}', 'web' => "\x{201e}"}, 1059: '#133' => {'tex' => '{/Symbol \274}', 'web'=> "\x{2026}"}, 1060: '#134' => {'tex' => '{/Text \262}', 'web' => "\x{2020}"}, 1061: '#135' => {'tex' => '{/Text \263}', 'web' => "\x{2021}"}, 1062: '#136' => {'tex' => '\\\\^', 'web' => '\\\\^'}, 1063: '#137' => {'tex' => '%o', 'web' => "\x{2030}"}, # Per Mille <FIX> 1064: '#138' => {'tex' => 'S', 'web' => "\x{160}"}, # S-Caron <FIX> 1065: '#139' => {'tex' => '<', 'web' => '<'}, 1066: '#140' => {'tex' => 'AE', 'web' => "\x{152}"}, # AE ligature <FIX> 1067: '#145' => {'tex' => '\140', 'web' => "\x{2018}"}, 1068: '#146' => {'tex' => '\47', 'web' => "\x{2019}"}, 1069: '#147' => {'tex' => '\140\140', 'web' => "\x{201c}"}, # Left " <FIX> 1070: '#148' => {'tex' => '\47\47', 'web' => '\\"'}, # Right " <FIX> 1071: '#149' => {'tex' => '{/Symbol \267}', 'web' => "\x{2022}"}, 1072: '#150' => {'tex' => '{/Text \55}', 'web' => "\x{2013}"}, # en dash 1073: '#151' => {'tex' => '{/Symbol \55}', 'web' => "\x{2014}"}, # em dash 1074: '#152' => {'tex' => '\\\\~', 'web' => '\\\\~'}, 1075: '#153' => {'tex' => '{/Symbol \324}', 'web' => "\x{2122}"}, # trademark 1076: 1077: # Accented letters, and other furreign language glyphs. 1078: 1079: '#154' => {'tex' => 's', 'web' => "\x{161}"}, # small s-caron no ps. 1080: '#155' => {'tex' => '>', 'web' => '\76'}, # > 1081: '#156' => {'tex' => '{/Text \366}', 'web' => "\x{153}"}, # oe ligature.<FIX> 1082: '#159', => {'tex' => 'Y', 'web' => "\x{178}"}, # Y-umlaut - can't print <FIX> 1083: '(nbsp|#160)' => {'tex' => ' ', 'web' => ' '}, # non breaking space. 1084: '(iexcl|#161)' => {'tex' => '{/Text \241}', 'web' => "\x{a1}"}, # inverted ! 1085: '(cent|#162)' => {'tex' => '{/Text \242}', 'web' => "\x{a2}"}, # Cent currency. 1086: '(pound|#163)' => {'tex' => '{/Text \243}', 'web' => "\x{a3}"}, # GB Pound currency. 1087: '(curren|#164)' => {'tex' => '{/ZapfDingbats \161}','web' => "\x{a4}"}, # Generic currency symb. <FIX> 1088: '(yen|#165)' => {'tex' => '{/Text \245}', 'web' => "\x{a5}"}, # Yen currency. 1089: '(brvbar|#166)' => {'tex' => '{/Symbol \174}', 'web' => "\x{a6}"}, # Broken vert bar no print. 1090: '(sect|#167)' => {'tex' => '{\247}', 'web' => "\x{a7}"}, # Section symbol. 1091: '(uml|#168)' => {'tex' => '{\250}', 'web' => "\x{a8}"}, # 'naked' umlaut. 1092: '(copy|#169)' => {'tex' => '{/Symbol \343}', 'web' => "\x{a9}"}, # Copyright symbol. 1093: '(ordf|#170)' => {'tex' => '{/Text \343}', 'web' => "\x{aa}"}, # Feminine ordinal. 1094: '(laquo|#171)' => {'tex' => '{/Text \253}', 'web' => "\x{ab}"}, # << quotes. 1095: '(not|#172)' => {'tex' => '\254', 'web' => "\x{ac}"}, # Logical not. 1096: '(shy|#173)' => {'tex' => '\255', 'web' => "\x{ad}"}, # soft hyphen. 1097: '(reg|#174)' => {'tex' => '{/Symbol \342}', 'web' => "\x{ae}"}, # Registered tm. 1098: '(macr|#175)' => {'tex' => '^{\255}', 'web' => "\x{af}"}, # 'naked' macron (overbar). 1099: '(deg|#176)' => {'tex' => '{/Text \260}', 'web' => "\x{b0}"}, # Degree symbo..` 1100: '(plusmn|#177)' => {'tex' => '{/Symbol \261}', 'web' => "\x{b1}"}, # +/- symbol. 1101: '(sup2|#178)' => {'tex' => '^2', 'web' => "\x{b2}"}, # Superscript 2. 1102: '(sup3|#179)' => {'tex' => '^3', 'web' => "\x{b3}"}, # Superscript 3. 1103: '(acute|#180)' => {'tex' => '{/Text \222}', 'web' => "\x{b4}"}, # 'naked' acute accent. 1104: '(micro|#181)' => {'tex' => '{/Symbol \155}', 'web' => "\x{b5}"}, # Micro (small mu). 1105: '(para|#182)' => {'tex' => '{/Text \266}', 'web' => "\x{b6}"}, # Paragraph symbol. 1106: '(middot|#183)' => {'tex' => '\267', 'web' => "\x{b7}"}, # middle dot 1107: '(cedil|#184)' => {'tex' => '\233', 'web' => "\x{b8}"}, # 'naked' cedilla. 1108: '(sup1|#185)' => {'tex' => '^1', 'web' => "\x{b9}"}, # superscript 1. 1109: '(ordm|#186)' => {'tex' => '{\260}', 'web' => "\x{ba}"}, # masculine ordinal. 1110: '(raquo|#187)', => {'tex' => '\273', 'web' => "\x{bb}"}, # Right angle quotes. 1111: '(frac14|#188)' => {'tex' => '\274', 'web' => "\x{bc}"}, # 1/4. 1112: '(frac12|#189)' => {'tex' => '\275', 'web' => "\x{bd}"}, # 1/2. 1113: '(frac34|#190)' => {'tex' => '\276', 'web' => "\x{be}"}, # 3/4 1114: '(iquest|#191)' => {'tex' => '{/Text \277}', 'web' => "\x{bf}"}, # Inverted ? 1115: '(Agrave|#192)' => {'tex' => '\300', 'web' => "\x{c0}"}, # A Grave. 1116: '(Aacute|#193)' => {'tex' => '\301', 'web' => "\x{c1}"}, # A Acute. 1117: '(Acirc|#194)' => {'tex' => '\302', 'web' => "\x{c2}"}, # A Circumflex. 1118: '(Atilde|#195)' => {'tex' => '\303', 'web' => "\x{c3}"}, # A tilde. 1119: '(Auml|#196)' => {'tex' => '\304', 'web' => "\x{c4}"}, # A umlaut. 1120: '(Aring|#197)' => {'tex' => '\305', 'web' => "\x{c5}"}, # A ring. 1121: '(AElig|#198)' => {'tex' => '\306', 'web' => "\x{c6}"}, # AE ligature. 1122: '(Ccedil|#199)' => {'tex' => '\307', 'web' => "\x{c7}"}, # C cedilla 1123: '(Egrave|#200)' => {'tex' => '\310', 'web' => "\x{c8}"}, # E Accent grave. 1124: '(Eacute|#201)' => {'tex' => '\311', 'web' => "\x{c9}"}, # E acute accent. 1125: '(Ecirc|#202)' => {'tex' => '\312', 'web' => "\x{ca}"}, # E Circumflex. 1126: '(Euml|#203)' => {'tex' => '\313', 'web' => "\x{cb}"}, # E umlaut. 1127: '(Igrave|#204)' => {'tex' => '\314', 'web' => "\x{cc}"}, # I grave accent. 1128: '(Iacute|#205)' => {'tex' => '\315', 'web' => "\x{cd}"}, # I acute accent. 1129: '(Icirc|#206)' => {'tex' => '\316', 'web' => "\x{ce}"}, # I circumflex. 1130: '(Iuml|#207)' => {'tex' => '\317', 'web' => "\x{cf}"}, # I umlaut. 1131: '(ETH|#208)' => {'tex' => '\320', 'web' => "\x{d0}"}, # Icelandic Cap eth. 1132: '(Ntilde|#209)' => {'tex' => '\321', 'web' => "\x{d1}"}, # Ntilde (enyan). 1133: '(Ograve|#210)' => {'tex' => '\322', 'web' => "\x{d2}"}, # O accent grave. 1134: '(Oacute|#211)' => {'tex' => '\323', 'web' => "\x{d3}"}, # O accent acute. 1135: '(Ocirc|#212)' => {'tex' => '\324', 'web' => "\x{d4}"}, # O circumflex. 1136: '(Otilde|#213)' => {'tex' => '\325', 'web' => "\x{d5}"}, # O tilde. 1137: '(Ouml|#214)' => {'tex' => '\326', 'web' => "\x{d6}"}, # O umlaut. 1138: '(times|#215)' => {'tex' => '\327', 'web' => "\x{d7}"}, # Times symbol. 1139: '(Oslash|#216)' => {'tex' => '\330', 'web' => "\x{d8}"}, # O slash. 1140: '(Ugrave|#217)' => {'tex' => '\331', 'web' => "\x{d9}"}, # U accent grave. 1141: '(Uacute|#218)' => {'tex' => '\332', 'web' => "\x{da}"}, # U accent acute. 1142: '(Ucirc|#219)' => {'tex' => '\333', 'web' => "\x{db}"}, # U circumflex. 1143: '(Uuml|#220)' => {'tex' => '\334', 'web' => "\x{dc}"}, # U umlaut. 1144: '(Yacute|#221)' => {'tex' => '\335', 'web' => "\x{dd}"}, # Y accent acute. 1145: '(THORN|#222)' => {'tex' => '\336', 'web' => "\x{de}"}, # Icelandic thorn. 1146: '(szlig|#223)' => {'tex' => '\337', 'web' => "\x{df}"}, # German sharfes s. 1147: '(agrave|#224)' => {'tex' => '\340', 'web' => "\x{e0}"}, # a accent grave. 1148: '(aacute|#225)' => {'tex' => '\341', 'web' => "\x{e1}"}, # a grave. 1149: '(acirc|#226)' => {'tex' => '\342', 'web' => "\x{e2}"}, # a circumflex. 1150: '(atilde|#227)' => {'tex' => '\343', 'web' => "\x{e3}"}, # a tilde. 1151: '(auml|#228)' => {'tex' => '\344', 'web' => "\x{e4}"}, # a umlaut 1152: '(aring|#229)' => {'tex' => '\345', 'web' => "\x{e5}"}, # a ring on top. 1153: '(aelig|#230)' => {'tex' => '\346', 'web' => "\x{e6}"}, # ae ligature. 1154: '(ccedil|#231)' => {'tex' => '\347', 'web' => "\x{e7}"}, # C cedilla 1155: '(egrave|#232)' => {'tex' => '\350', 'web' => "\x{e8}"}, # e accent grave. 1156: '(eacute|#233)' => {'tex' => '\351', 'web' => "\x{e9}"}, # e accent acute. 1157: '(ecirc|#234)' => {'tex' => '\352', 'web' => "\x{ea}" }, # e circumflex. 1158: '(euml|#235)' => {'tex' => '\353', 'web' => "\x{eb}"}, # e umlaut. 1159: '(igrave|#236)' => {'tex' => '\354', 'web' => "\x{ec}"}, # i grave. 1160: '(iacute|#237)' => {'tex' => '\355', 'web' => "\x{ed}"}, # i acute. 1161: '(icirc|#238)' => {'tex' => '\356', 'web' => "\x{ee}"}, # i circumflex. 1162: '(iuml|#239)' => {'tex' => '\357', 'web' => "\x{ef}"}, # i umlaut. 1163: '(eth|#240)' => {'tex' => '\360', 'web' => "\x{f0}"}, # Icelandic eth. 1164: '(ntilde|#241)' => {'tex' => '\361', 'web' => "\x{f1}"}, # n tilde. 1165: '(ograve|#242)' => {'tex' => '\362', 'web' => "\x{f2}"}, # o grave. 1166: '(oacute|#243)' => {'tex' => '\363', 'web' => "\x{f3}"}, # o acute. 1167: '(ocirc|#244)' => {'tex' => '\364', 'web' => "\x{f4}"}, # o circumflex. 1168: '(otilde|#245)' => {'tex' => '\365', 'web' => "\x{f5}"}, # o tilde. 1169: '(ouml|#246)' => {'tex' => '\366', 'web' => "\x{f6}"}, # o umlaut. 1170: '(divide|#247)' => {'tex' => '\367', 'web' => "\x{f7}"}, # division symbol 1171: '(oslash|#248)' => {'tex' => '\370', 'web' => "\x{f8}"}, # o slashed. 1172: '(ugrave|#249)' => {'tex' => '\371', 'web' => "\x{f9}"}, # u accent grave. 1173: '(uacute|#250)' => {'tex' => '\372', 'web' => "\x{fa}"}, # u acute. 1174: '(ucirc|#251)' => {'tex' => '\373', 'web' => "\x{fb}"}, # u circumflex. 1175: '(uuml|#252)' => {'tex' => '\374', 'web' => "\x{fc}"}, # u umlaut. 1176: '(yacute|#253)' => {'tex' => '\375', 'web' => "\x{fd}"}, # y acute accent. 1177: '(thorn|#254)' => {'tex' => '\376', 'web' => "\x{fe}"}, # small thorn (icelandic). 1178: '(yuml|#255)' => {'tex' => '\377', 'web' => "\x{ff}"}, # y umlaut. 1179: 1180: # Latin extended A entities: 1181: 1182: '(OElig|#338)' => {'tex' => '{/Text \326}', 'web' => "\x{152}"}, # OE ligature. 1183: '(oelig|#339)' => {'tex' => '{/Text \366}', 'web' => "\x{153}"}, # oe ligature. 1184: '(Scaron|#352)' => {'tex' => 'S', 'web' => "\x{160}"}, # S caron no printable. 1185: '(scaron|#353)' => {'tex' => 's', 'web' => "\x{161}"}, # s caron no printable. 1186: '(Yuml|#376)' => {'tex' => 'Y', 'web' => "\x{178}"}, # Y umlaut - no printable. 1187: 1188: # Latin extended B. 1189: 1190: '(fnof|#402)' => {'tex' =>'{/Symbol \246}', 'web' => "\x{192}"}, # f with little hook. 1191: 1192: # Standalone accents: 1193: 1194: '(circ|#710)' => {'tex' => '^', 'web' => '^'}, # circumflex. 1195: '(tilde|#732)' => {'tex' => '~', 'web' => '~'}, # tilde. 1196: 1197: # General punctuation. We're not able to make a distinction between 1198: # the various length spacings in the print version. (e.g. en/em/thin). 1199: # the various joiners will be empty strings in the print version too. 1200: 1201: 1202: '(ensp|#8194)' => {'tex' => ' ', 'web' => "\x{2002}"}, # en space. 1203: '(emsp|#8195)' => {'tex' => ' ', 'web' => "\x{2003}"}, # em space. 1204: '(thinsp|#8201)' => {'tex' => ' ', 'web' => "\x{2009}"}, # thin space. 1205: '(zwnj|#8204)' => {'tex' => ' ', 'web' => "\x{200c}"}, # Zero width non joiner. 1206: '(zwj|#8205)' => {'tex' => ' ', 'web' => "\x{200d}"}, # Zero width joiner. 1207: '(lrm|#8206)' => {'tex' => ' ', 'web' => "\x{200e}"}, # Left to right mark 1208: '(rlm|#8207)' => {'tex' => ' ', 'web' => "\x{200f}"}, # right to left mark. 1209: '(ndash|#8211)' => {'tex' => '{/Text \55}', 'web' => "\x{2013}"}, # en dash. 1210: '(mdash|#8212)' => {'tex' => '{/Symbol \55}', 'web' => "\x{2014}"}, # em dash. 1211: '(lsquo|#8216)' => {'tex' => '{/Text \140}', 'web' => "\x{2018}"}, # Left single quote. 1212: '(rsquo|#8217)' => {'tex' => '\47', 'web' => "\x{2019}"}, # Right single quote. 1213: '(sbquo|#8218)' => {'tex' => '\54', 'web' => "\x{201a}"}, # Single low-9 quote. 1214: '(ldquo|#8220)' => {'tex' => '\42', 'web' => "\x{201c}"}, # Left double quote. 1215: '(rdquo|#8221)' => {'tex' => '\42', 'web' => "\x{201d}"}, # Right double quote. 1216: '(bdquo|#8222)' => {'tex' => ',', 'web' => "\x{201e}"}, # Double low-9 quote. 1217: '(dagger|#8224)' => {'tex' => '+', 'web' => "\x{2020}"}, # Is this a dagger I see before me now? 1218: '(Dagger|#8225)' => {'tex' => '\261', 'web' => "\x{2021}"}, # it's handle pointing towards my heart? 1219: '(bull|#8226)' => {'tex' => '\267', 'web' => "\x{2022}"}, # Bullet. 1220: '(hellep|#8230)' => {'tex' => '{/Symbol \274}', 'web' => "\x{2026}"}, # Ellipses. 1221: '(permil|#8240)' => {'tex' => '%_o', 'web' => "\x{2031}"}, # Per mille. 1222: '(prime|#8242)' => {'tex' => '\264', 'web' => "\x{2032}"}, # Prime. 1223: '(Prime|#8243)' => {'tex' => '{/Symbol \262}', 'web' => "\x{2033}"}, # double prime. 1224: '(lsaquo|#8249)' => {'tex' => '<', 'web' => "\x{2039}"}, # < quote. 1225: '(rsaquo|#8250)' => {'tex' => '\74', 'web' => "\x{203a}"}, # > quote. 1226: '(oline|#8254)' => {'tex' => '{/Symbol \140}', 'web' => "\x{203e}"}, # Overline. 1227: '(frasl|#8260)' => {'tex' => '/', 'web' => "\x{2044}"}, # Fraction slash. 1228: '(euro|#8364)' => {'tex' => '{/Symbol \240}', 'web' => "\x{20ac}"}, # Euro currency. 1229: 1230: # Letter like symbols. 1231: 1232: '(weierp|#8472)' => {'tex' => '{/Symbol \303}', 'web' => "\x{2118}"}, # Power set symbol 1233: '(image|#8465)' => {'tex' => '{/Symbol \301}', 'web' => "\x{2111}"}, # Imaginary part 1234: '(real|#8476)' => {'tex' => '{/Symbol \302}', 'web' => "\x{211c}"}, # Real part. 1235: '(trade|#8482)' => {'tex' => '{/Symbol \344}', 'web' => "\x{2122}"}, # trademark symbol. 1236: '(alefsym|#8501)' => {'tex' => '{/Symbol \300}', 'web' => "\x{2135}"}, # Hebrew alef. 1237: 1238: # Arrows of various types and directions. 1239: '(larr|#8592)' => {'tex' => '{/Symbol \254}', 'web' => "\x{2190}"}, # <-- 1240: '(uarr|#8593)' => {'tex' => '{/Symbol \255}', 'web' => "\x{2191}"}, # up arrow. 1241: '(rarr|#8594)' => {'tex' => '{/Symbol \256}', 'web' => "\x{2192}"}, # --> 1242: '(darr|#8595)' => {'tex' => '{/Symbol \257}', 'web' => "\x{2193}"}, # down arrow. 1243: '(harr|#8596)' => {'tex' => '{/Symbol \253}', 'web' => "\x{2194}"}, # <--> 1244: '(crarr|#8629)' => {'tex' => '{/Symbol \277}', 'web' => "\x{21b5}"}, # corner arrow down and right. 1245: '(lArr|#8656)' => {'tex' => '{/Symbol \334}', 'web' => "\x{21d0}"}, # <== 1246: '(uArr|#8657)' => {'tex' => '{/Symbol \335}', 'web' => "\x{21d1}"}, # Up double arrow. 1247: '(rArr|#8658)' => {'tex' => '{/Symbol \336}', 'web' => "\x{21d2}"}, # ==> 1248: '(dArr|#8659)' => {'tex' => '{/Symbol \337}', 'web' => "\x{21d3}"}, # Down double arrow. 1249: '(hArr|#8660)' => {'tex' => '{/Symbol \333}', 'web' => "\x{21d4}"}, # <==> 1250: 1251: # Mathematical operators. For some of these we do the best we can in printing. 1252: 1253: '(forall|#8704)' => {'tex' => '{/Symbol \42}', 'web' => "\x{2200}"}, # For all. 1254: '(part|#8706)' => {'tex' => '{/Symbol d}', 'web' => "\x{2202}"}, # partial derivative 1255: '(exist|#8707)' => {'tex' => '{/Symbol \44}', 'web' => "\x{2203}"}, # There exists. 1256: '(empty|#8709)' => {'tex' => '{/Symbol \306}', 'web' => "\x{2205}"}, # Null set. 1257: '(nabla|#8711)' => {'tex' => '{/Symbol \321}', 'web' => "\x{2207}"}, # Gradient e.g. 1258: '(isin|#8712)' => {'tex' => '{/Symbol \316}', 'web' => "\x{2208}"}, # Element of the set. 1259: '(notin|#8713)' => {'tex' => '{/Symbol \317}', 'web' => "\x{2209}"}, # Not an element of 1260: '(ni|#8715)' => {'tex' => '{/Symbol \47}', 'web' => "\x{220b}"}, # Contains as a member 1261: '(prod|#8719)' => {'tex' => '{/Symbol \325}', 'web' => "\x{220f}"}, # Product 1262: '(sum|#8721)' => {'tex' => '{/Symbol \345}', 'web' => "\x{2211}"}, # Sum of. 1263: '(minus|#8722)' => {'tex' => '{/Symbol \55}', 'web' => "\x{2212}"}, # - sign. 1264: '(lowast|#8727)' => {'tex' => '*', 'web' => "\x{2217}"}, # * 1265: '(radic|#8730)' => {'tex' => '{/Symbol \326}', 'web' => "\x{221a}"}, # Square root. 1266: '(prop|#8733)' => {'tex' => '{/Symbol \265}', 'web' => "\x{221d}"}, # Proportional to. 1267: '(infin|#8734)' => {'tex' => '{/Symbol \245}', 'web' => "\x{221e}"}, # Infinity. 1268: '(ang|#8736)' => {'tex' => '{/Symbol \320}', 'web' => "\x{2220}"}, # Angle . 1269: '(and|#8743)' => {'tex' => '{/Symbol \331}', 'web' => "\x{2227}"}, # Logical and. 1270: '(or|#8744)' => {'tex' => '{/Symbol \332}', 'web' => "\x{2228}"}, # Logical or. 1271: '(cap|#8745)' => {'tex' => '{/Symbol \307}', 'web' => "\x{2229}"}, # Set intersection. 1272: '(cup|#8746)' => {'tex' => '{/Symbol \310}', 'web' => "\x{222a}"}, # Set union. 1273: '(int|8747)' => {'tex' => '{/Symbol \362}', 'web' => "\x{222b}"}, # Integral. 1274: 1275: # Some gnuplot guru will have to explain to me why the next three 1276: # require the extra slashes... else they print very funkily. 1277: 1278: '(there4|#8756)' => {'tex' => '{/Symbol \\\134}', 'web' => "\x{2234}"}, # Therefore triple dots. 1279: '(sim|#8764)' => {'tex' => '\\\176', 'web' => "\x{223c}"}, # Simlar to. 1280: '(cong|#8773)' => {'tex' => '{/Symbol \\\100}','web' => "\x{2245}"}, # Congruent to/with. 1281: 1282: '(asymp|#8776)' => {'tex' => '{/Symbol \273}', 'web' => "\x{2248}"}, # Asymptotic to. 1283: '(ne|#8800)' => {'tex' => '{/Symbol \271}', 'web' => "\x{2260}"}, # not equal to. 1284: '(equiv|#8801)' => {'tex' => '{/Symbol \272}', 'web' => "\x{2261}"}, # Equivalent to. 1285: '(le|8804)' => {'tex' => '{/Symbol \243}', 'web' => "\x{2264}"}, # Less than or equal to. 1286: '(ge|8805)' => {'tex' => '{/Symbol \263}', 'web' => "\x{2265}"}, # Greater than or equal to 1287: '(sub|8834)' => {'tex' => '{/Symbol \314}', 'web' => "\x{2282}"}, # Subset of. 1288: '(sup|8835)' => {'tex' => '{/Symbol \311}', 'web' => "\x{2283}"}, # Super set of. 1289: '(nsub|8836)' => {'tex' => '{/Symbol \313}', 'web' => "\x{2284}"}, # not subset of. 1290: '(sube|8838)' => {'tex' => '{/Symbol \315}', 'web' => "\x{2286}"}, # Subset or equal. 1291: '(supe|8839)' => {'tex' => '{/Symbol \312}', 'web' => "\x{2287}"}, # Superset or equal 1292: '(oplus|8853)' => {'tex' => '{/Symbol \305}', 'web' => "\x{2295}"}, # O with plus inside 1293: '(otimes|8855)' => {'tex' => '{/Symbol \304}', 'web' => "\x{2297}"}, # O with times. 1294: '(perp|8869)' => {'tex' => '{/Symbol \136}', 'web' => "\x{22a5}"}, # Perpendicular. 1295: '(sdot|8901)' => {'tex' => '{/Symbol \227}', 'web' => "\x{22c5}"}, # Dot operator. 1296: 1297: # Misc. technical symbols: 1298: 1299: '(lceil|8698)' => {'tex' => '{/Symbol \351}', 'web' => "\x{2308}"}, # Left ceiling. 1300: '(rceil|8969)' => {'tex' => '{/Symbol \371}', 'web' => "\x{2309}"}, # Right ceiling. 1301: '(lfloor|8970)' => {'tex' => '{/Symbol \353}', 'web' => "\x{230a}"}, # Left floor. 1302: '(rfloor|8971)' => {'tex' => '{/Symbol \373}', 'web' => "\x{230b}"}, # Right floor. 1303: 1304: # The gnuplot png font evidently does not have the big angle brackets at 1305: # positions 0x2329, 0x232a so use ordinary brackets. 1306: 1307: '(lang|9001)' => {'tex' => '{/Symbol \341}', 'web' => '<'}, # Left angle bracket. 1308: '(rang|9002)' => {'tex' => '{/Symbol \361}', 'web' => '>'}, # Right angle bracket. 1309: 1310: # Gemoetric shapes. 1311: 1312: '(loz|9674)' => {'tex' => '{/Symbol \340}', 'web' => "\x{25ca}"}, # Lozenge. 1313: 1314: # Misc. symbols 1315: 1316: '(spades|9824)' => {'tex' => '{/Symbol \252}', 'web' => "\x{2660}"}, 1317: '(clubs|9827)' => {'tex' => '{/Symbol \247}', 'web' => "\x{2663}"}, 1318: '(hearts|9829)' => {'tex' => '{/Symbol \251}', 'web' => "\x{2665}"}, 1319: '(diams|9830)' => {'tex' => '{/Symbol \250}', 'web' => "\x{2666}"} 1320: 1321: ); 1322: 1323: 1324: sub replace_entities { 1325: my ($target,$text) = @_; 1326: $text =~ s{([_^~\{\}]|\\\\)}{\\\\$1}g; 1327: while (my ($re, $replace) = each(%lookup)) { 1328: my $repl = $replace->{$target}; 1329: $text =~ s/&$re;/$replace->{$target}/g; 1330: } 1331: $text =~ s{(&)}{\\\\$1}g; 1332: return $text; 1333: } 1334: 1335: ##------------------------------------------------------------------- title 1336: sub start_title { 1337: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1338: my $result=''; 1339: if ($target eq 'web' || $target eq 'tex') { 1340: $title = &Apache::lonxml::get_all_text("/title",$parser,$style); 1341: $title=&Apache::run::evaluate($title,$safeeval,$$parstack[-1]); 1342: $title =~ s/\n/ /g; 1343: if (length($title) > $max_str_len) { 1344: $title = substr($title,0,$max_str_len); 1345: } 1346: $title = &parse_label($target,$title); 1347: } elsif ($target eq 'edit') { 1348: $result.=&Apache::edit::tag_start($target,$token,'Plot Title'); 1349: my $text=&Apache::lonxml::get_all_text("/title",$parser,$style); 1350: $result.=&Apache::edit::editline('',$text,'',60); 1351: } elsif ($target eq 'modified') { 1352: $result.=&Apache::edit::rebuild_tag($token); 1353: $result.=&Apache::edit::modifiedfield("/title",$parser); 1354: } 1355: return $result; 1356: } 1357: 1358: sub end_title { 1359: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1360: my $result = ''; 1361: if ($target eq 'web' || $target eq 'tex') { 1362: } elsif ($target eq 'edit') { 1363: $result.=&Apache::edit::tag_end($target,$token); 1364: } 1365: return $result; 1366: } 1367: ##------------------------------------------------------------------- xlabel 1368: sub start_xlabel { 1369: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1370: my $result=''; 1371: if ($target eq 'web' || $target eq 'tex') { 1372: $xlabel = &Apache::lonxml::get_all_text("/xlabel",$parser,$style); 1373: $xlabel=&Apache::run::evaluate($xlabel,$safeeval,$$parstack[-1]); 1374: $xlabel =~ s/\n/ /g; 1375: if (length($xlabel) > $max_str_len) { 1376: $xlabel = substr($xlabel,0,$max_str_len); 1377: } 1378: $xlabel = &parse_label($target,$xlabel); 1379: } elsif ($target eq 'edit') { 1380: $result.=&Apache::edit::tag_start($target,$token,'Plot Xlabel'); 1381: my $text=&Apache::lonxml::get_all_text("/xlabel",$parser,$style); 1382: $result.=&Apache::edit::editline('',$text,'',60); 1383: } elsif ($target eq 'modified') { 1384: $result.=&Apache::edit::rebuild_tag($token); 1385: $result.=&Apache::edit::modifiedfield("/xlabel",$parser); 1386: } 1387: return $result; 1388: } 1389: 1390: sub end_xlabel { 1391: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1392: my $result = ''; 1393: if ($target eq 'web' || $target eq 'tex') { 1394: } elsif ($target eq 'edit') { 1395: $result.=&Apache::edit::tag_end($target,$token); 1396: } 1397: return $result; 1398: } 1399: 1400: ##------------------------------------------------------------------- ylabel 1401: sub start_ylabel { 1402: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1403: my $result=''; 1404: if ($target eq 'web' || $target eq 'tex') { 1405: $ylabel = &Apache::lonxml::get_all_text("/ylabel",$parser,$style); 1406: $ylabel = &Apache::run::evaluate($ylabel,$safeeval,$$parstack[-1]); 1407: $ylabel =~ s/\n/ /g; 1408: if (length($ylabel) > $max_str_len) { 1409: $ylabel = substr($ylabel,0,$max_str_len); 1410: } 1411: $ylabel = &parse_label($target,$ylabel); 1412: } elsif ($target eq 'edit') { 1413: $result .= &Apache::edit::tag_start($target,$token,'Plot Ylabel'); 1414: my $text = &Apache::lonxml::get_all_text("/ylabel",$parser,$style); 1415: $result .= &Apache::edit::editline('',$text,'',60); 1416: } elsif ($target eq 'modified') { 1417: $result.=&Apache::edit::rebuild_tag($token); 1418: $result.=&Apache::edit::modifiedfield("/ylabel",$parser); 1419: } 1420: return $result; 1421: } 1422: 1423: sub end_ylabel { 1424: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1425: my $result = ''; 1426: if ($target eq 'web' || $target eq 'tex') { 1427: } elsif ($target eq 'edit') { 1428: $result.=&Apache::edit::tag_end($target,$token); 1429: } 1430: return $result; 1431: } 1432: 1433: ##------------------------------------------------------------------- label 1434: sub start_label { 1435: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1436: my $result=''; 1437: if ($target eq 'web' || $target eq 'tex') { 1438: my %label; 1439: &get_attributes(\%label,\%label_defaults,$parstack,$safeeval, 1440: $tagstack->[-1]); 1441: my $text = &Apache::lonxml::get_all_text("/label",$parser,$style); 1442: $text = &Apache::run::evaluate($text,$safeeval,$$parstack[-1]); 1443: $text =~ s/\n/ /g; 1444: $text = substr($text,0,$max_str_len) if (length($text) > $max_str_len); 1445: $label{'text'} = &parse_label($target,$text); 1446: push(@labels,\%label); 1447: } elsif ($target eq 'edit') { 1448: $result .= &Apache::edit::tag_start($target,$token,'Plot Label'); 1449: $result .= &edit_attributes($target,$token,\%label_defaults); 1450: my $text = &Apache::lonxml::get_all_text("/label",$parser,$style); 1451: $result .= &Apache::edit::end_row(). 1452: &Apache::edit::start_spanning_row(). 1453: &Apache::edit::editline('',$text,'',60); 1454: } elsif ($target eq 'modified') { 1455: &Apache::edit::get_new_args 1456: ($token,$parstack,$safeeval,keys(%label_defaults)); 1457: $result.=&Apache::edit::rebuild_tag($token); 1458: $result.=&Apache::edit::modifiedfield("/label",$parser); 1459: } 1460: return $result; 1461: } 1462: 1463: sub end_label { 1464: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1465: my $result = ''; 1466: if ($target eq 'web' || $target eq 'tex') { 1467: } elsif ($target eq 'edit') { 1468: $result.=&Apache::edit::tag_end($target,$token); 1469: } 1470: return $result; 1471: } 1472: 1473: ##------------------------------------------------------------------- curve 1474: sub start_curve { 1475: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1476: my $result=''; 1477: &Apache::lonxml::register('Apache::lonplot',('function','data')); 1478: push (@Apache::lonxml::namespace,'curve'); 1479: if ($target eq 'web' || $target eq 'tex') { 1480: my %curve; 1481: &get_attributes(\%curve,\%curve_defaults,$parstack,$safeeval, 1482: $tagstack->[-1]); 1483: push (@curves,\%curve); 1484: } elsif ($target eq 'edit') { 1485: &fixup_colors($token); 1486: $result .= &Apache::edit::tag_start($target,$token,'Curve'); 1487: $result .= &edit_attributes($target,$token,\%curve_defaults, 1488: \@curve_edit_order) 1489: .&Apache::edit::end_row() 1490: .&Apache::edit::start_spanning_row(); 1491: 1492: } elsif ($target eq 'modified') { 1493: my $constructtag=&Apache::edit::get_new_args 1494: ($token,$parstack,$safeeval,keys(%curve_defaults)); 1495: my $fixed = &fixup_colors($token); 1496: if ($constructtag || $fixed) { 1497: $result = &Apache::edit::rebuild_tag($token); 1498: } 1499: } 1500: return $result; 1501: } 1502: 1503: sub end_curve { 1504: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1505: my $result = ''; 1506: pop @Apache::lonxml::namespace; 1507: &Apache::lonxml::deregister('Apache::lonplot',('function','data')); 1508: if ($target eq 'web' || $target eq 'tex') { 1509: } elsif ($target eq 'edit') { 1510: $result.=&Apache::edit::tag_end($target,$token); 1511: } 1512: return $result; 1513: } 1514: 1515: ##------------------------------------------------------------ curve function 1516: sub start_function { 1517: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1518: my $result=''; 1519: if ($target eq 'web' || $target eq 'tex') { 1520: if (exists($curves[-1]->{'data'})) { 1521: &Apache::lonxml::warning 1522: ('Use of the <b>curve function</b> tag precludes use of '. 1523: ' the <b>curve data</b> tag. '. 1524: 'The curve data tag will be omitted in favor of the '. 1525: 'curve function declaration.'); 1526: delete $curves[-1]->{'data'} ; 1527: } 1528: my $function = &Apache::lonxml::get_all_text("/function",$parser, 1529: $style); 1530: $function = &Apache::run::evaluate($function,$safeeval,$$parstack[-1]); 1531: $function=~s/\^/\*\*/gs; 1532: $function=~ s/^\s+//; # Trim leading 1533: $function=~ s/\s+$//; # And trailing whitespace. 1534: $curves[-1]->{'function'} = $function; 1535: } elsif ($target eq 'edit') { 1536: $result .= &Apache::edit::tag_start($target,$token,'Gnuplot compatible curve function'); 1537: my $text = &Apache::lonxml::get_all_text("/function",$parser,$style); 1538: $result .= &Apache::edit::editline('',$text,'',60); 1539: } elsif ($target eq 'modified') { 1540: $result.=&Apache::edit::rebuild_tag($token); 1541: $result.=&Apache::edit::modifiedfield("/function",$parser); 1542: } 1543: return $result; 1544: } 1545: 1546: sub end_function { 1547: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1548: my $result = ''; 1549: if ($target eq 'web' || $target eq 'tex') { 1550: } elsif ($target eq 'edit') { 1551: $result .= &Apache::edit::end_table(); 1552: } 1553: return $result; 1554: } 1555: 1556: ##------------------------------------------------------------ curve data 1557: sub start_data { 1558: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1559: my $result=''; 1560: if ($target eq 'web' || $target eq 'tex') { 1561: if (exists($curves[-1]->{'function'})) { 1562: &Apache::lonxml::warning 1563: ('Use of the <b>curve function</b> tag precludes use of '. 1564: ' the <b>curve data</b> tag. '. 1565: 'The curve function tag will be omitted in favor of the '. 1566: 'curve data declaration.'); 1567: delete($curves[-1]->{'function'}); 1568: } 1569: my $datatext = &Apache::lonxml::get_all_text("/data",$parser,$style); 1570: $datatext=&Apache::run::evaluate($datatext,$safeeval,$$parstack[-1]); 1571: # Deal with cases where we're given an array... 1572: if ($datatext =~ /^\@/) { 1573: $datatext = &Apache::run::run('return "'.$datatext.'"', 1574: $safeeval,1); 1575: } 1576: $datatext =~ s/\s+/ /g; 1577: # Need to do some error checking on the @data array - 1578: # make sure it's all numbers and make sure each array 1579: # is of the same length. 1580: my @data; 1581: if ($datatext =~ /,/) { # comma deliminated 1582: @data = split /,/,$datatext; 1583: } else { # Assume it's space separated. 1584: @data = split / /,$datatext; 1585: } 1586: for (my $i=0;$i<=$#data;$i++) { 1587: # Check that it's non-empty 1588: if (! defined($data[$i])) { 1589: &Apache::lonxml::warning( 1590: 'undefined curve data value. Replacing with '. 1591: ' pi/e = 1.15572734979092'); 1592: $data[$i] = 1.15572734979092; 1593: } 1594: # Check that it's a number 1595: if (! &$real_test($data[$i]) & ! &$int_test($data[$i])) { 1596: &Apache::lonxml::warning( 1597: 'Bad curve data value of '.$data[$i].' Replacing with '. 1598: ' pi/e = 1.15572734979092'); 1599: $data[$i] = 1.15572734979092; 1600: } 1601: } 1602: # complain if the number of data points is not the same as 1603: # in previous sets of data. 1604: if (($curves[-1]->{'data'}) && ($#data != $#{$curves[-1]->{'data'}->[0]})){ 1605: &Apache::lonxml::warning 1606: ('Number of data points is not consistent with previous '. 1607: 'number of data points'); 1608: } 1609: push @{$curves[-1]->{'data'}},\@data; 1610: } elsif ($target eq 'edit') { 1611: $result .= &Apache::edit::tag_start($target,$token,'Comma or space deliminated curve data'); 1612: my $text = &Apache::lonxml::get_all_text("/data",$parser,$style); 1613: $result .= &Apache::edit::editline('',$text,'',60); 1614: } elsif ($target eq 'modified') { 1615: $result.=&Apache::edit::rebuild_tag($token); 1616: $result.=&Apache::edit::modifiedfield("/data",$parser); 1617: } 1618: return $result; 1619: } 1620: 1621: sub end_data { 1622: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1623: my $result = ''; 1624: if ($target eq 'web' || $target eq 'tex') { 1625: } elsif ($target eq 'edit') { 1626: $result .= &Apache::edit::end_table(); 1627: } 1628: return $result; 1629: } 1630: 1631: ##------------------------------------------------------------------- axis 1632: sub start_axis { 1633: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1634: my $result=''; 1635: if ($target eq 'web' || $target eq 'tex') { 1636: &get_attributes(\%axis,\%axis_defaults,$parstack,$safeeval, 1637: $tagstack->[-1]); 1638: } elsif ($target eq 'edit') { 1639: &fixup_colors($token); 1640: $result .= &Apache::edit::tag_start($target,$token,'Plot Axes'); 1641: $result .= &edit_attributes($target,$token,\%axis_defaults, 1642: \@axis_edit_order); 1643: } elsif ($target eq 'modified') { 1644: my $constructtag=&Apache::edit::get_new_args 1645: ($token,$parstack,$safeeval,keys(%axis_defaults)); 1646: my $fixed = &fixup_colors($token); 1647: if ($constructtag || $fixed) { 1648: $result = &Apache::edit::rebuild_tag($token); 1649: } 1650: } 1651: return $result; 1652: } 1653: 1654: sub end_axis { 1655: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1656: my $result = ''; 1657: if ($target eq 'web' || $target eq 'tex') { 1658: } elsif ($target eq 'edit') { 1659: $result.=&Apache::edit::tag_end($target,$token); 1660: } elsif ($target eq 'modified') { 1661: } 1662: return $result; 1663: } 1664: 1665: ################################################################### 1666: ## ## 1667: ## Utility Functions ## 1668: ## ## 1669: ################################################################### 1670: 1671: ##----------------------------------------------------------- set_defaults 1672: sub set_defaults { 1673: my ($var,$defaults) = @_; 1674: my $key; 1675: foreach $key (keys(%$defaults)) { 1676: $var->{$key} = $defaults->{$key}->{'default'}; 1677: } 1678: } 1679: 1680: ##------------------------------------------------------------------- misc 1681: sub get_attributes{ 1682: my ($values,$defaults,$parstack,$safeeval,$tag) = @_; 1683: foreach my $attr (keys(%{$defaults})) { 1684: if ($attr eq 'texwidth' || $attr eq 'texfont') { 1685: $values->{$attr} = 1686: &Apache::lonxml::get_param($attr,$parstack,$safeeval,undef,1); 1687: } else { 1688: $values->{$attr} = 1689: &Apache::lonxml::get_param($attr,$parstack,$safeeval); 1690: } 1691: if ($values->{$attr} eq '' | !defined($values->{$attr})) { 1692: $values->{$attr} = $defaults->{$attr}->{'default'}; 1693: next; 1694: } 1695: my $test = $defaults->{$attr}->{'test'}; 1696: if (! &$test($values->{$attr})) { 1697: my $warning = &mt('Replacing your value with: [_1].', 1698: $defaults->{$attr}->{'default'}); 1699: my $missingprefix; 1700: if (($env{'form.problemmode'} eq 'editxml') || 1701: ($env{'form.problemmode'} eq 'edit')) { 1702: $warning = &mt('On display your value will be replaced with: [_1].', 1703: $defaults->{$attr}->{'default'}); 1704: if (($env{'form.problemmode'} eq 'edit') && 1705: ($attr =~ /^(|fg|bg)color$/) && ($values->{$attr} =~ /^[\da-fA-F]{6}$/)) { 1706: $missingprefix = 1; 1707: $warning = &mt('The current value is missing the prefix: [_1].', 1708: $colorprefix).' '. 1709: &mt('As the color picker entry adds the prefix, saving will fix this issue.'); 1710: } 1711: } 1712: unless ($missingprefix) { 1713: $values->{$attr} = $defaults->{$attr}->{'default'}; 1714: } 1715: &Apache::lonxml::warning 1716: ($tag.':'.$attr.': '.&mt('Bad value').'. '.$warning); 1717: } 1718: } 1719: return ; 1720: } 1721: ## 1722: # Generate tic mark specifications. 1723: # 1724: # @param type - type of tics (xtics or ytics). 1725: # @param spec - Reference to a hash that contains the tic specification. 1726: # @param target - 'tex' if hard copy target. 1727: # 1728: # @return string - the tic specification command. 1729: # 1730: sub generate_tics { 1731: my ($type, $spec, $target) = @_; 1732: my $result = ''; 1733: 1734: 1735: if ((ref($spec) eq 'HASH') && (keys(%{$spec}) > 0)) { 1736: 1737: 1738: 1739: # Major tics: - If there are 'ticspecs' these override any other 1740: # specifications: 1741: 1742: 1743: 1744: $result .= "set $type $spec->{'location'} "; 1745: $result .= ($spec->{'mirror'} eq 'on') ? 'mirror ' : 'nomirror '; 1746: if ($spec->{'rotate'} eq 'on') { 1747: $result .= ' rotate '; 1748: } 1749: if (defined $spec->{'ticspecs'}) { 1750: $result .= '( '; 1751: my @ticspecs; 1752: my $ticinfo = $spec->{'ticspecs'}; 1753: foreach my $tic (@$ticinfo) { 1754: push(@ticspecs, '"' . $tic->{'label'} . '" ' . $tic->{'pos'} ); 1755: } 1756: $result .= join(', ', (@ticspecs)); 1757: $result .= ' )'; 1758: } else { 1759: $result .= "$spec->{'start'}, "; 1760: $result .= "$spec->{'increment'}, "; 1761: $result .= "$spec->{'end'} "; 1762: } 1763: if ($target eq 'tex' ) { 1764: $result .= 'font "Helvetica,22"'; 1765: } 1766: $result .= "\n"; 1767: 1768: # minor frequency: 1769: 1770: if ($spec->{'minorfreq'} != 0) { 1771: $result .= "set m$type $spec->{'minorfreq'}\n"; 1772: } 1773: } elsif ($target eq 'tex' ) { 1774: $result .= "set $type font " . '"Helvetica,22"' ."\n"; 1775: } 1776: 1777: 1778: return $result; 1779: } 1780: 1781: ##------------------------------------------------------- write_gnuplot_file 1782: sub write_gnuplot_file { 1783: my ($tmpdir,$filename,$target)= @_; 1784: my ($fontsize, $font_properties) = &get_font($target); 1785: my $gnuplot_input = ''; 1786: my $curve; 1787: # 1788: # Check to be sure we do not have any empty curves 1789: my @curvescopy; 1790: foreach my $curve (@curves) { 1791: if (exists($curve->{'function'})) { 1792: if ($curve->{'function'} !~ /^\s*$/) { 1793: push(@curvescopy,$curve); 1794: } 1795: } elsif (exists($curve->{'data'})) { 1796: foreach my $data (@{$curve->{'data'}}) { 1797: if (scalar(@$data) > 0) { 1798: push(@curvescopy,$curve); 1799: last; 1800: } 1801: } 1802: } 1803: } 1804: @curves = @curvescopy; 1805: # Collect all the colors 1806: my @Colors; 1807: if ($version < 4.6) { 1808: push(@Colors,$Apache::lonplot::plot{'bgcolor'}); 1809: push(@Colors,$Apache::lonplot::plot{'fgcolor'}); 1810: push(@Colors,(defined($axis{'color'})?$axis{'color'}:$Apache::lonplot::plot{'fgcolor'})); 1811: foreach $curve (@curves) { 1812: push(@Colors,($curve->{'color'} ne '' ? 1813: $curve->{'color'} : 1814: $Apache::lonplot::plot{'fgcolor'})); 1815: } 1816: } 1817: 1818: # set term 1819: if ($target eq 'web') { 1820: $gnuplot_input .= 'set terminal png enhanced nocrop '; 1821: $gnuplot_input .= 'transparent ' if ($Apache::lonplot::plot{'transparent'} eq 'on'); 1822: $gnuplot_input .= 'font "'.$Apache::lonnet::perlvar{'lonFontsDir'}. 1823: '/'.$font_properties->{'file'}.'.ttf" '; 1824: $gnuplot_input .= $fontsize; 1825: $gnuplot_input .= ' size '.$Apache::lonplot::plot{'width'}.','.$Apache::lonplot::plot{'height'}.' '; 1826: if ($version >= 4.6) { 1827: if ($Apache::lonplot::plot{'bgcolor'}) { 1828: $gnuplot_input .= "background '$Apache::lonplot::plot{'bgcolor'}'\n"; 1829: } 1830: } else { 1831: $gnuplot_input .= "@Colors\n"; 1832: } 1833: # set output 1834: $gnuplot_input .= "set output\n"; 1835: } elsif ($target eq 'tex') { 1836: $gnuplot_input .= "set term postscript eps enhanced $Apache::lonplot::plot{'plotcolor'} dash "; 1837: if (!$font_properties->{'tex_no_file'}) { 1838: $gnuplot_input .= 1839: 'fontfile "'.$Apache::lonnet::perlvar{'lonFontsDir'}. 1840: '/'.$font_properties->{'file'}.'.pfb" '; 1841: } 1842: if (($version >= 4.6) && ($Apache::lonplot::plot{'plotcolor'} =~ /^colou?r$/) && 1843: ($Apache::lonplot::plot{'bgcolor'} ne '')) { 1844: $gnuplot_input .= "background '$Apache::lonplot::plot{'bgcolor'}' "; 1845: } 1846: $gnuplot_input .= ' "'.$font_properties->{'printname'}.'" '; 1847: $gnuplot_input .= $fontsize; 1848: $gnuplot_input .= "\nset output \"".$tmpdir. 1849: &unescape($filename).".eps\"\n"; 1850: $gnuplot_input .= "set encoding iso_8859_1\n"; # Get access to extended font. 1851: 1852: } 1853: $gnuplot_input .= "set encoding utf8\n"; 1854: # cartesian or polar plot? 1855: if (lc($Apache::lonplot::plot{'plottype'}) eq 'polar') { 1856: $gnuplot_input .= 'set polar'.$/; 1857: } else { 1858: # Assume Cartesian 1859: } 1860: # cartesian or polar grid? 1861: if (lc($Apache::lonplot::plot{'gridtype'}) eq 'polar') { 1862: $gnuplot_input .= 'set grid polar'.$/; 1863: } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'linear-log') { 1864: $gnuplot_input .= 'set logscale x'.$/; 1865: } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'log-linear') { 1866: $gnuplot_input .= 'set logscale y'.$/; 1867: } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'log-log') { 1868: $gnuplot_input .= 'set logscale x'.$/; 1869: $gnuplot_input .= 'set logscale y'.$/; 1870: } else { 1871: # Assume Cartesian 1872: } 1873: # solid or pattern for boxes? 1874: if (lc($Apache::lonplot::plot{'fillstyle'}) eq 'solid') { 1875: $gnuplot_input .= 'set style fill solid '. 1876: $Apache::lonplot::plot{'solid'}.$Apache::lonplot::plot{'box_border'}.$/; 1877: } elsif (lc($Apache::lonplot::plot{'fillstyle'}) eq 'pattern') { 1878: $gnuplot_input .= 'set style fill pattern '.$Apache::lonplot::plot{'pattern'}.$Apache::lonplot::plot{'box_border'}.$/; 1879: } elsif (lc($Apache::lonplot::plot{'fillstyle'}) eq 'empty') { 1880: } 1881: # margin 1882: if (lc($Apache::lonplot::plot{'lmargin'}) ne 'default') { 1883: $gnuplot_input .= 'set lmargin '.$Apache::lonplot::plot{'lmargin'}.$/; 1884: } 1885: if (lc($Apache::lonplot::plot{'rmargin'}) ne 'default') { 1886: $gnuplot_input .= 'set rmargin '.$Apache::lonplot::plot{'rmargin'}.$/; 1887: } 1888: if (lc($Apache::lonplot::plot{'tmargin'}) ne 'default') { 1889: $gnuplot_input .= 'set tmargin '.$Apache::lonplot::plot{'tmargin'}.$/; 1890: } 1891: if (lc($Apache::lonplot::plot{'bmargin'}) ne 'default') { 1892: $gnuplot_input .= 'set bmargin '.$Apache::lonplot::plot{'bmargin'}.$/; 1893: } 1894: 1895: # tic scales 1896: if ($version > 4) { 1897: $gnuplot_input .= 'set tics scale '. 1898: $Apache::lonplot::plot{'major_ticscale'}.', '.$Apache::lonplot::plot{'minor_ticscale'}.$/; 1899: } else { 1900: $gnuplot_input .= 'set ticscale '. 1901: $Apache::lonplot::plot{'major_ticscale'}.' '.$Apache::lonplot::plot{'minor_ticscale'}.$/; 1902: } 1903: #boxwidth 1904: if (lc($Apache::lonplot::plot{'boxwidth'}) ne '') { 1905: $gnuplot_input .= 'set boxwidth '.$Apache::lonplot::plot{'boxwidth'}.$/; 1906: } 1907: # gridlayer 1908: $gnuplot_input .= 'set grid noxtics noytics front '.$/ 1909: if ($Apache::lonplot::plot{'gridlayer'} eq 'on'); 1910: 1911: # grid 1912: if ($Apache::lonplot::plot{'grid'} eq 'on') { 1913: if (($version >= 4.6) && (($axis{'color'} ne '') || ($Apache::lonplot::plot{'fgcolor'} ne ''))) { 1914: if (($target eq 'web') || (($target eq 'tex') && 1915: ($Apache::lonplot::plot{'plotcolor'} =~ /^colou?r$/))) { 1916: $gnuplot_input .= 'set grid linecolor rgb "'. 1917: (($axis{'color'} ne '')?$axis{'color'}: 1918: $Apache::lonplot::plot{'fgcolor'}). 1919: '" '.$/; 1920: 1921: } else { 1922: $gnuplot_input .= 'set grid'.$/; 1923: } 1924: } else { 1925: $gnuplot_input .= 'set grid'.$/; 1926: } 1927: } 1928: # border 1929: if ($Apache::lonplot::plot{'border'} eq 'on') { 1930: if (($version >= 4.6) && ($Apache::lonplot::plot{'fgcolor'} ne '')) { 1931: if (($target eq 'web') || (($target eq 'tex') && 1932: ($Apache::lonplot::plot{'plotcolor'} =~ /^colou?r$/))) { 1933: $gnuplot_input .= 'set border linecolor rgb "'. 1934: $Apache::lonplot::plot{'fgcolor'}.'" '.$/; 1935: } else { 1936: $gnuplot_input .= 'set border '.$/; 1937: } 1938: } else { 1939: $gnuplot_input .= 'set border '.$/; 1940: } 1941: } else { 1942: $gnuplot_input .= 'set noborder '.$/; 1943: } 1944: # sampling rate for non-data curves 1945: $gnuplot_input .= "set samples $Apache::lonplot::plot{'samples'}\n"; 1946: # title, xlabel, ylabel 1947: # titles 1948: my $extra_space_x = ($xtics{'location'} eq 'axis') ? ' offset 0, -0.5 ' : ''; 1949: my $extra_space_y = ($ytics{'location'} eq 'axis') ? ' offset -0.5, 0 ' : ''; 1950: 1951: if ($target eq 'tex') { 1952: $gnuplot_input .= "set title \"$title\" font \"".$font_properties->{'printname'}.",".$fontsize."pt\"\n" if (defined($title)) ; 1953: $gnuplot_input .= "set xlabel \"$xlabel\" $extra_space_x font \"".$font_properties->{'printname'}.",".$fontsize."pt\"\n" if (defined($xlabel)); 1954: $gnuplot_input .= "set ylabel \"$ylabel\" $extra_space_y font \"".$font_properties->{'printname'}.",".$fontsize."pt\"\n" if (defined($ylabel)); 1955: } else { 1956: $gnuplot_input .= "set title \"$title\" \n" if (defined($title)) ; 1957: $gnuplot_input .= "set xlabel \"$xlabel\" $extra_space_x \n" if (defined($xlabel)); 1958: $gnuplot_input .= "set ylabel \"$ylabel\" $extra_space_y \n" if (defined($ylabel)); 1959: } 1960: # tics 1961: $gnuplot_input .= &generate_tics('xtics', \%xtics, $target); 1962: 1963: $gnuplot_input .= &generate_tics('ytics', \%ytics, $target); 1964: 1965: # axis 1966: if (%axis) { 1967: if ($axis{'xformat'} ne 'on') { 1968: $gnuplot_input .= "set format x "; 1969: if ($axis{'xformat'} eq 'off') { 1970: $gnuplot_input .= "\"\"\n"; 1971: } else { 1972: if ($axis{'xformat'} =~ /^(\d+P\s*)[Pp][Ii]/) { 1973: my $xprefix = $1; 1974: if (($target eq 'web') || ($target eq 'tex')) { 1975: $axis{'xformat'} = $xprefix.$lookup{'(pi|#960)'}{$target}; 1976: } else { 1977: $axis{'xformat'} = $xprefix; 1978: } 1979: } 1980: $gnuplot_input .= "\"\%.".$axis{'xformat'}."\"\n"; 1981: } 1982: } 1983: if ($axis{'yformat'} ne 'on') { 1984: $gnuplot_input .= "set format y "; 1985: if ($axis{'yformat'} eq 'off') { 1986: $gnuplot_input .= "\"\"\n"; 1987: } else { 1988: if ($axis{'yformat'} =~ /^(\d+P\s*)[Pp][Ii]/) { 1989: my $yprefix = $1; 1990: if (($target eq 'web') || ($target eq 'tex')) { 1991: $axis{'yformat'} = $yprefix.$lookup{'(pi|#960)'}{$target}; 1992: } else { 1993: $axis{'yformat'} = $yprefix; 1994: } 1995: } 1996: $gnuplot_input .= "\"\%.".$axis{'yformat'}."\"\n"; 1997: } 1998: } 1999: $gnuplot_input .= "set xrange \[$axis{'xmin'}:$axis{'xmax'}\]\n"; 2000: $gnuplot_input .= "set yrange \[$axis{'ymin'}:$axis{'ymax'}\]\n"; 2001: if ($axis{'xzero'} ne 'off') { 2002: $gnuplot_input .= "set xzeroaxis "; 2003: if ($axis{'xzero'} eq 'line' || $axis{'xzero'} eq 'thick-line') { 2004: $gnuplot_input .= "lt -1 "; 2005: if ($axis{'xzero'} eq 'thick-line') { 2006: $gnuplot_input .= "lw 3 "; 2007: } 2008: } 2009: $gnuplot_input .= "\n"; 2010: } 2011: if ($axis{'yzero'} ne 'off') { 2012: $gnuplot_input .= "set yzeroaxis "; 2013: if ($axis{'yzero'} eq 'line' || $axis{'yzero'} eq 'thick-line') { 2014: $gnuplot_input .= "lt -1 "; 2015: if ($axis{'yzero'} eq 'thick-line') { 2016: $gnuplot_input .= "lw 3 "; 2017: } 2018: } 2019: $gnuplot_input .= "\n"; 2020: } 2021: } 2022: # Key 2023: if (%key) { 2024: $gnuplot_input .= 'set key '.$key{'pos'}.' '; 2025: if ($key{'title'} ne '') { 2026: $gnuplot_input .= 'title "'.$key{'title'}.'" '; 2027: } 2028: $gnuplot_input .= ($key{'box'} eq 'on' ? 'box ' : 'nobox ').$/; 2029: } else { 2030: $gnuplot_input .= 'set nokey'.$/; 2031: } 2032: # labels 2033: my $label; 2034: foreach $label (@labels) { 2035: $gnuplot_input .= 'set label "'.$label->{'text'}.'" at '. 2036: $label->{'xpos'}.','.$label->{'ypos'}; 2037: if ($label->{'rotate'} ne '') { 2038: $gnuplot_input .= ' rotate by '.$label->{'rotate'}; 2039: } 2040: $gnuplot_input .= ' '.$label->{'justify'}; 2041: 2042: if ($target eq 'tex') { 2043: $gnuplot_input .=' font "'.$font_properties->{'printname'}.','.$fontsize.'pt"'; 2044: } 2045: if (($label->{'zlayer'} eq 'front') || ($label->{'zlayer'} eq 'back')) { 2046: $gnuplot_input .= ' '.$label->{'zlayer'}; 2047: } 2048: $gnuplot_input .= $/; 2049: } 2050: if ($target eq 'tex') { 2051: $gnuplot_input .="set size 1,".$Apache::lonplot::plot{'height'}/$Apache::lonplot::plot{'width'}*1.38; 2052: $gnuplot_input .="\n"; 2053: } 2054: # curves 2055: # 2056: # Each curve will have its very own linestyle. 2057: # (This should work just fine in web rendition I think). 2058: # The line_xxx variables will hold the elements of the line style. 2059: # type (solid/dashed), color, width 2060: # 2061: my $linestyle_index = 50; 2062: my $line_width = ''; 2063: my $plots = ''; 2064: 2065: # If arrows are needed there will be an arrow style for each as well: 2066: # 2067: 2068: my $arrow_style_index = 50; 2069: 2070: for (my $i = 0;$i<=$#curves;$i++) { 2071: $curve = $curves[$i]; 2072: my $plot_command = ''; 2073: my $plot_type = ''; 2074: if ($i > 0) { 2075: $plot_type = ', '; 2076: } 2077: if ($target eq 'tex') { 2078: $curve->{'linewidth'} *= 2; 2079: } 2080: $line_width = $curve->{'linewidth'}; 2081: if (exists($curve->{'function'})) { 2082: $plot_type .= 2083: $curve->{'function'}.' title "'. 2084: $curve->{'name'}.'" with '. 2085: $curve->{'linestyle'}; 2086: } elsif (exists($curve->{'data'})) { 2087: # Store data values in $datatext 2088: my $datatext = ''; 2089: # get new filename 2090: my $datafilename = "$tmpdir/$filename.data.$i"; 2091: my $fh=Apache::File->new(">$datafilename"); 2092: # Compile data 2093: my @Data = @{$curve->{'data'}}; 2094: my @Data0 = @{$Data[0]}; 2095: for (my $i =0; $i<=$#Data0; $i++) { 2096: my $dataset; 2097: foreach $dataset (@Data) { 2098: $datatext .= $dataset->[$i] . ' '; 2099: } 2100: $datatext .= $/; 2101: } 2102: # write file 2103: print $fh $datatext; 2104: close($fh); 2105: # generate gnuplot text 2106: $plot_type .= '"'.$datafilename.'" title "'. 2107: $curve->{'name'}.'" with '. 2108: $curve->{'linestyle'}; 2109: } 2110: my $pointtype = ''; 2111: my $pointsize = ''; 2112: 2113: # Figure out the linestyle: 2114: 2115: my $lt = $curve->{'linetype'} ne '' ? $curve->{'linetype'} 2116: : 'solid'; # Line type defaults to solid. 2117: # The mapping of lt -> the actual gnuplot line type depends on the target: 2118: 2119: if ($target eq 'tex') { 2120: $lt = $ps_linetypes{$lt}; 2121: } else { 2122: $lt = $linetypes{$lt} 2123: } 2124: 2125: my $color = $curve->{'color'}; 2126: $color =~ s/^x/#/; # Convert xhex color -> #hex color. 2127: 2128: 2129: if (($curve->{'linestyle'} eq 'points') || 2130: ($curve->{'linestyle'} eq 'linespoints') || 2131: ($curve->{'linestyle'} eq 'errorbars') || 2132: ($curve->{'linestyle'} eq 'xerrorbars') || 2133: ($curve->{'linestyle'} eq 'yerrorbars') || 2134: ($curve->{'linestyle'} eq 'xyerrorbars')) { 2135: 2136: $pointtype =' pointtype '.$curve->{'pointtype'}; 2137: $pointsize =' pointsize '.$curve->{'pointsize'}; 2138: } elsif ($curve->{'linestyle'} eq 'filledcurves') { 2139: $plot_command.= ' '.$curve->{'limit'}; 2140: } elsif ($curve->{'linestyle'} eq 'vector') { 2141: 2142: # Create the arrow head style add it to 2143: # $gnuplot_input..and ensure it gets 2144: # Selected in the plot command. 2145: 2146: $gnuplot_input .= "set style arrow $arrow_style_index "; 2147: $gnuplot_input .= ' ' . $curve->{'arrowhead'}; 2148: $gnuplot_input .= ' size ' . $curve->{'arrowlength'}; 2149: $gnuplot_input .= ','.$curve->{'arrowangle'}; 2150: $gnuplot_input .= ',' . $curve->{'arrowbackangle'}; 2151: $gnuplot_input .= ' ' . $curve->{'arrowstyle'} . " ls $linestyle_index\n"; 2152: 2153: 2154: $plot_command .= " arrowstyle $arrow_style_index "; 2155: $arrow_style_index++; 2156: } 2157: 2158: my $style_command = "set style line $linestyle_index $pointtype $pointsize linetype $lt linewidth $line_width lc rgb '$color'\n"; 2159: $gnuplot_input .= $style_command; 2160: 2161: # The condition below is because gnuplot lumps the linestyle in with the 2162: # arrowstyle _sigh_. 2163: 2164: if ($curve->{'linestyle'} ne 'vector') { 2165: $plot_command.= " ls $linestyle_index"; 2166: } 2167: 2168: $plots .= $plot_type . ' ' . $plot_command; 2169: $linestyle_index++; # Each curve get a unique linestyle. 2170: } 2171: $gnuplot_input .= 'plot '.$plots; 2172: # Write the output to a file. 2173: 2174: # &Apache::lonnet::logthis($gnuplot_input); # uncomment to log the gnuplot input. 2175: open (my $fh, "> $tmpdir$filename.data"); 2176: binmode($fh, ':utf8'); 2177: print $fh $gnuplot_input; 2178: close($fh); 2179: # That's all folks. 2180: return ; 2181: } 2182: 2183: #---------------------------------------------- check_inputs 2184: sub check_inputs { 2185: ## Note: no inputs, no outputs - this acts only on global variables. 2186: ## Make sure we have all the input we need: 2187: if (! %Apache::lonplot::plot) { &set_defaults(\%Apache::lonplot::plot,\%gnuplot_defaults); } 2188: if (! %key ) {} # No key for this plot, thats okay 2189: # if (! %axis) { &set_defaults(\%axis,\%axis_defaults); } 2190: if (! defined($title )) {} # No title for this plot, thats okay 2191: if (! defined($xlabel)) {} # No xlabel for this plot, thats okay 2192: if (! defined($ylabel)) {} # No ylabel for this plot, thats okay 2193: if ($#labels < 0) { } # No labels for this plot, thats okay 2194: if ($#curves < 0) { 2195: &Apache::lonxml::warning("No curves specified for plot!!!!"); 2196: return ''; 2197: } 2198: my $curve; 2199: foreach $curve (@curves) { 2200: if (!defined($curve->{'function'})&&!defined($curve->{'data'})){ 2201: &Apache::lonxml::warning("One of the curves specified did not contain any curve data or curve function declarations\n"); 2202: return ''; 2203: } 2204: } 2205: } 2206: 2207: #------------------------------------------ edit_attributes 2208: sub edit_attributes { 2209: my ($target,$token,$defaults,$keys) = @_; 2210: my ($result,@keys); 2211: if ($keys && ref($keys) eq 'ARRAY') { 2212: @keys = @$keys; 2213: } else { 2214: @keys = sort(keys(%$defaults)); 2215: } 2216: foreach my $attr (@keys) { 2217: # append a ' ' to the description if it doesn't have one already. 2218: my $description = $defaults->{$attr}->{'description'}; 2219: $description .= ' ' if ($description !~ / $/); 2220: if ($defaults->{$attr}->{'edit_type'} eq 'entry') { 2221: $result .= &Apache::edit::text_arg 2222: ($description,$attr,$token, 2223: $defaults->{$attr}->{'size'}, 2224: $defaults->{$attr}->{'class'}); 2225: } elsif ($defaults->{$attr}->{'edit_type'} eq 'choice') { 2226: $result .= &Apache::edit::select_or_text_arg 2227: ($description,$attr,$defaults->{$attr}->{'choices'},$token); 2228: } elsif ($defaults->{$attr}->{'edit_type'} eq 'onoff') { 2229: $result .= &Apache::edit::select_or_text_arg 2230: ($description,$attr,['on','off'],$token); 2231: } 2232: $result .= '<br />'; 2233: } 2234: return $result; 2235: } 2236: 2237: #------------------------------------------ fixup_colors 2238: 2239: sub fixup_colors { 2240: my ($token,$attribref) = @_; 2241: my @attributes; 2242: if (ref($attribref) eq 'ARRAY') { 2243: @attributes = @{$attribref}; 2244: } else { 2245: @attributes = ('color'); 2246: } 2247: 2248: # 2249: # Fix up the color attribute since jchooser does not 2250: # prepend an x (or #) to the color: 2251: # 2252: my $had_changes; 2253: if ((ref($token) eq 'ARRAY') && (ref($token->[2]) eq 'HASH')) { 2254: foreach my $attribute (@attributes) { 2255: if ($attribute =~ /^(|bg|fg)color$/) { 2256: my $value = $token->[2]{$attribute}; 2257: if (defined($value)) { 2258: if ($version < 4.6) { 2259: $value=~s/^\#/x/; 2260: } else { 2261: $value=~s/^x/#/; 2262: } 2263: if ($value ne $token->[2]{$attribute}) { 2264: $token->[2]{$attribute} = $value; 2265: $had_changes = 1; 2266: } 2267: if ($value !~ /^\Q$colorprefix\E/) { 2268: $token->[2]{$attribute} = $colorprefix . $value; 2269: $had_changes = 1; 2270: } 2271: } 2272: } 2273: } 2274: } 2275: return $had_changes; 2276: } 2277: 2278: ################################################################### 2279: ## ## 2280: ## Insertion functions for editing plots ## 2281: ## ## 2282: ################################################################### 2283: 2284: sub insert_gnuplot { 2285: my $result = ''; 2286: # plot attributes 2287: $result .= "\n<gnuplot "; 2288: foreach my $attr (keys(%gnuplot_defaults)) { 2289: $result .= "\n $attr=\"$gnuplot_defaults{$attr}->{'default'}\""; 2290: } 2291: $result .= ">"; 2292: # Add the components (most are commented out for simplicity) 2293: # $result .= &insert_key(); 2294: # $result .= &insert_axis(); 2295: # $result .= &insert_title(); 2296: # $result .= &insert_xlabel(); 2297: # $result .= &insert_ylabel(); 2298: $result .= &insert_curve(); 2299: # close up the <gnuplot> 2300: $result .= "\n</gnuplot>"; 2301: return $result; 2302: } 2303: 2304: sub insert_tics { 2305: my $result; 2306: $result .= &insert_xtics() . &insert_ytics; 2307: return $result; 2308: } 2309: 2310: sub insert_xtics { 2311: my $result; 2312: $result .= "\n <xtics "; 2313: foreach my $attr (keys(%tic_defaults)) { 2314: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" "; 2315: } 2316: $result .= "/>"; 2317: return $result; 2318: } 2319: 2320: sub insert_ytics { 2321: my $result; 2322: $result .= "\n <ytics "; 2323: foreach my $attr (keys(%tic_defaults)) { 2324: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" "; 2325: } 2326: $result .= "/>"; 2327: return $result; 2328: } 2329: 2330: sub insert_key { 2331: my $result; 2332: $result .= "\n <key "; 2333: foreach my $attr (keys(%key_defaults)) { 2334: $result .= "\n $attr=\"$key_defaults{$attr}->{'default'}\""; 2335: } 2336: $result .= " />"; 2337: return $result; 2338: } 2339: 2340: sub insert_axis{ 2341: my $result; 2342: $result .= "\n <axis "; 2343: foreach my $attr (keys(%axis_defaults)) { 2344: $result .= "\n $attr=\"$axis_defaults{$attr}->{'default'}\""; 2345: } 2346: $result .= " />"; 2347: return $result; 2348: } 2349: 2350: sub insert_title { return "\n <title></title>"; } 2351: sub insert_xlabel { return "\n <xlabel></xlabel>"; } 2352: sub insert_ylabel { return "\n <ylabel></ylabel>"; } 2353: 2354: sub insert_label { 2355: my $result; 2356: $result .= "\n <label "; 2357: foreach my $attr (keys(%label_defaults)) { 2358: $result .= "\n $attr=\"". 2359: $label_defaults{$attr}->{'default'}."\""; 2360: } 2361: $result .= "></label>"; 2362: return $result; 2363: } 2364: 2365: sub insert_curve { 2366: my $result; 2367: $result .= "\n <curve "; 2368: foreach my $attr (keys(%curve_defaults)) { 2369: $result .= "\n $attr=\"". 2370: $curve_defaults{$attr}->{'default'}."\""; 2371: } 2372: $result .= " >"; 2373: $result .= &insert_data().&insert_data()."\n </curve>"; 2374: } 2375: 2376: sub insert_function { 2377: my $result; 2378: $result .= "\n <function></function>"; 2379: return $result; 2380: } 2381: 2382: sub insert_data { 2383: my $result; 2384: $result .= "\n <data></data>"; 2385: return $result; 2386: } 2387: 2388: ##---------------------------------------------------------------------- 2389: 1; 2390: __END__ 2391: 2392: 2393: =head1 NAME 2394: 2395: Apache::lonplot.pm 2396: 2397: =head1 SYNOPSIS 2398: 2399: XML-based plotter of graphs 2400: 2401: This is part of the LearningOnline Network with CAPA project 2402: described at http://www.lon-capa.org. 2403: 2404: 2405: =head1 SUBROUTINES (parsing and edit rendering) 2406: 2407: =over 2408: 2409: =item start_gnuplot() 2410: 2411: =item end_gnuplot() 2412: 2413: =item start_xtics() 2414: 2415: =item end_xtics() 2416: 2417: =item start_ytics() 2418: 2419: =item end_ytics() 2420: 2421: =item get_font() 2422: 2423: =item start_key() 2424: 2425: =item end_key() 2426: 2427: =item parse_label() 2428: 2429: =item replace_entities() 2430: 2431: =item start_title() 2432: 2433: =item end_title() 2434: 2435: =item start_xlabel() 2436: 2437: =item end_xlabel() 2438: 2439: =item start_ylabel() 2440: 2441: =item end_label() 2442: 2443: =item start_curve() 2444: 2445: =item end_curve() 2446: 2447: =item start_function() 2448: 2449: =item end_function() 2450: 2451: =item start_data() 2452: 2453: =item end_data() 2454: 2455: =item start_axis() 2456: 2457: =item end_axis 2458: 2459: =back 2460: 2461: =head1 SUBROUTINES (Utility) 2462: 2463: =over 2464: 2465: =item set_defaults() 2466: 2467: =item get_attributes() 2468: 2469: =item write_gnuplot_file() 2470: 2471: =item check_inputs() 2472: 2473: =item edit_attributes() 2474: 2475: =item fixup_colors() 2476: 2477: =back 2478: 2479: =head1 SUBROUTINES (Insertion functions for editing plots) 2480: 2481: =over 2482: 2483: =item insert_gnuplot() 2484: 2485: =item insert_tics() 2486: 2487: =item insert_xtics() 2488: 2489: =item insert_key() 2490: 2491: =item insert_axis() 2492: 2493: =item insert_title() 2494: 2495: =item insert_xlabel() 2496: 2497: =item insert_ylabel() 2498: 2499: =item insert_label() 2500: 2501: =item insert_curve() 2502: 2503: =item insert_function() 2504: 2505: =item insert_data() 2506: 2507: =back 2508: 2509: =cut