loncom/interface/entities.pm - view

File: [LON-CAPA] / loncom / interface / entities.pm
Revision 1.23: download - view: text, annotated - select for diffs
Sat Feb 23 20:05:50 2019 UTC (5 years, 8 months ago) by raeburn
Branches: MAIN
CVS tags: version_2_12_X, version_2_11_X, version_2_11_5_msu, version_2_11_5, version_2_11_4_uiuc, version_2_11_4_msu, version_2_11_4, version_2_11_3_uiuc, version_2_11_3_msu, version_2_11_3, version_2_11_2_msu, HEAD

- Bug 6899

# The LearningOnline Network # entity -> tex. # # $Id: entities.pm,v 1.23 2019/02/23 20:05:50 raeburn Exp $ # # Copyright Michigan State University Board of Trustees # # This file is part of the LearningOnline Network with CAPA (LON-CAPA). # # LON-CAPA is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2 of the License, or # (at your option) any later version. # # LON-CAPA is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with LON-CAPA; if not, write to the Free Software # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA # # /home/httpd/html/adm/gpl.txt # http://www.lon-capa.org/ # # package Apache::entities; use strict; =pod =head1 TABLES ASCII code page =over =item (7-13) Translation to empty strings =item (32-126) Translations to simple characters =item (130-140) Controls and Latin-1 supplement. Note that some entities that have visible effect are not printing unicode characters. Specifically -  =item (145-156) There's a gap here in my entity table =item (159-255) Another short gap =item (295) hbar entity number comes from the unicode character: see e.g. http://www.unicode.org/charts/PDF/U0100.pdf ISO also documents a 'planck' entity. =item (338-376) Latin extended-A HTML 4.01 entities =item (402) Latin extended B HTML 4.01 entities =item (710 & 732) Spacing modifier letters =item (913-937) Greek uppercase (skipss 930) =item (945-982) Greek lowercase =item (8194-8364) The general punctuation set =item (8462-8501) Letter like symbols =item (8592-8669) Arrows and then some (harpoons from Hon Kie). =item (8704-8734) Mathematical operators. =item (8735-9830) The items below require the isoent latex package which I can't find at least for FC5. Temporarily commented out. =back =cut my %entities = ( # Translation to empty strings: 7 => "", 9 => "", 10 => "", 13 => "", # Translations to simple characters: 32 => " ", 33 => "!", 34 => '"', 'quot' => '"', 35 => '\\#', 36 => '\\$', 37 => '\%', 38 => '\&', 'amp' => '\&', 39 => '\'', # Apostrophe 40 => '(', 41 => ')', 42 => '*', 43 => '+', 44 => ',', # comma 45 => '-', 46 => '.', 47 => '/', 48 => '0', 49 => '1', 50 => '2', 51 => '3', 52 => '4', 53 => '5', 54 => '6', 55 => '7', 56 => '8', 57 => '9', 58 => ':', 59 => ';', 60 => '\ensuremath{<}', 'lt' => '\ensuremath{<}', 61 => '\ensuremath{=}', 62 => '\ensuremath{>}', 'gt' => '\ensuremath{>}', 63 => '?', 64 => '@', 65 => 'A', 66 => 'B', 67 => 'C', 68 => 'D', 69 => 'E', 70 => 'F', 71 => 'G', 72 => 'H', 73 => 'I', 74 => 'J', 75 => 'K', 76 => 'L', 77 => 'M', 78 => 'N', 79 => 'O', 80 => 'P', 81 => 'Q', 82 => 'R', 83 => 'S', 84 => 'T', 85 => 'U', 86 => 'V', 87 => 'W', 88 => 'X', 89 => 'Y', 90 => 'Z', 91 => '[', 92 => '\ensuremath{\setminus}', # \setminus is \ with special spacing. 93 => ']', 94 => '\ensuremath{\wedge}', 95 => '\underline{\makebox[2mm]{\strut}}', # Underline 2mm of space for _ 96 => '`', 97 => 'a', 98 => 'b', 99 => 'c', 100 => 'd', 101 => 'e', 102 => 'f', 103 => 'g', 104 => 'h', 105 => 'i', 106 => 'j', 107 => 'k', 108 => 'l', 109 => 'm', 110 => 'n', 111 => 'o', 112 => 'p', 113 => 'q', 114 => 'r', 115 => 's', 116 => 't', 117 => 'u', 118 => 'v', 119 => 'w', 120 => 'x', 121 => 'y', 122 => 'z', 123 => '\{', 124 => '|', 125 => '\}', 126 => '\~', # Controls and Latin-1 supplement. 130 => ',', 131 => '\ensuremath{f}', 132 => ',,', # Low double left quotes. 133 => '\ensuremath{\ldots}', 134 => '\ensuremath{\dagger}', 135 => '\ensuremath{\ddagger}', 136 => '\ensuremath{\wedge}', 137 => '\textperthousand ', 138 => '\v{S}', 139 => '\ensuremath{<}', 140 => '{\OE}', # There's a gap here in my entity table 145 => '`', 146 => '\'', 147 => '``', 148 => '\'\'', 149 => '\ensuremath{\bullet}', 150 => '--', 151 => '---', 152 => '\ensuremath{\sim}', 153 => '\texttrademark', 154 => '\v{s}', 155 => '\ensuremath{>}', 156 => '\oe ', # Another short gap: 159 => '\"Y', 160 => '~', 'nbsp' => '~', 161 => '\textexclamdown ', 'iexcl' => '\textexclamdown ', 162 => '\textcent ', 'cent' => '\textcent ', 163 => '\pounds ', 'pound' => '\pounds ', 164 => '\textcurrency ', 'curren' => '\textcurrency ', 165 => '\textyen ', 'yen' => '\textyen ', 166 => '\textbrokenbar ', 'brvbar' => '\textbrokenbar ', 167 => '\textsection ', 'sect' => '\textsection ', 168 => '\"{}', 'uml' => '\"{}', 169 => '\copyright ', 'copy' => '\copyright ', 170 => '\textordfeminine ', 'ordf' => '\textordfeminine ', 171 => '\ensuremath{\ll}', # approximation of left angle quote. 'laquo' => '\ensuremath{\ll}', # "" 172 => '\ensuremath{\neg}', 'not' => '\ensuremath{\neg}', 173 => ' - ', 'shy' => ' - ', 174 => '\textregistered ', 'reg' => '\textregistered ', 175 => '\ensuremath{^{-}}', 'macr' => '\ensuremath{^{-}}', 176 => '\ensuremath{^{\circ}}', 'deg' => '\ensuremath{^{\circ}}', 177 => '\ensuremath{\pm}', 'plusmn' => '\ensuremath{\pm}', 178 => '\ensuremath{^2}', 'sup2' => '\ensuremath{^2}', 179 => '\ensuremath{^3}', 'sup3' => '\ensuremath{^3}', 180 => "\\'{}", 'acute' => "\\'{}", 181 => '\ensuremath{\mu}', 'micro' => '\ensuremath{\mu}', 182 => '\P ', para => '\P ', 183 => '\ensuremath{\cdot}', 'middot' => '\ensuremath{\cdot}', 184 => '\c{\strut}', 'cedil' => '\c{\strut}', 185 => '\ensuremath{^1}', sup1 => '\ensuremath{^1}', 186 => '\textordmasculine ', 'ordm' => '\textordmasculine ', 187 => '\ensuremath{\gg}', 'raquo' => '\ensuremath{\gg}', 188 => '\textonequarter ', 'frac14' => '\textonequarter ', 189 => '\textonehalf' , 'frac12' => '\textonehalf' , 190 => '\textthreequarters ', 'frac34' => '\textthreequarters ', 191 => '\textquestiondown ', 'iquest' => '\textquestiondown ', 192 => '\\`{A}', 'Agrave' => '\\`{A}', 193 => "\\'{A}", 'Aacute' => "\\'{A}", 194 => '\^{A}', 'Acirc' => '\^{A}', 195 => '\~{A}', 'Atilde'=> '\~{A}', 196 => '\\"{A}', 'Auml' => '\\"{A}', 197 => '{\AA}', 'Aring' => '{\AA}', 198 => '{\AE}', 'AElig' => '{\AE}', 199 => '\c{c}', 'Ccedil'=> '\c{c}', 200 => '\\`{E}', 'Egrave'=> '\\`{E}', 201 => "\\'{E}", 'Eacute'=> "\\'{E}", 202 => '\\^{E}', 'Ecirc' => '\\^{E}', 203 => '\\"{E}', 'Euml' => '\\"{E}', 204 => '\\`{I}', 'Igrave'=> '\\`{I}', 205 => "\\'{I}", 'Iacute'=> "\\'{I}", 206 => '\\^{I}', 'Icirc' => '\\^{I}', 207 => '\\"{I}', 'Iuml' => '\\"{I}', 208 => '\DH', 'ETH' => '\DH', 209 => '\~{N}', 'Ntilde'=> '\~{N}', 210 => '\\`{O}', 'Ograve'=> '\\`{O}', 211 => "\\'{O}", 'Oacute'=> "\\'{O}", 212 => '\\^{O}', 'Ocirc' => '\\^{O}', 213 => '\~{O}', 'Otilde'=> '\~{O}', 214 => '\\"{O}', 'Ouml' => '\\"{O}', 215 => '\ensuremath{\times}', 'times' => '\ensuremath{\times}', 216 => '\O', 'Oslash'=> '\O', 217 => '\\`{U}', 'Ugrave'=> '\\`{U}', 218 => "\\'{U}", 'Uacute'=> "\\'{U}", 219 => '\\^{U}', 'Ucirc' => '\\^{U}', 220 => '\\"{U}', 'Uuml' => '\\"{U}', 221 => "\\'{Y}", 'Yacute'=> "\\'{Y}", 223 => '{\ss}', 'szlig' => '{\ss}', 224 => '\\`{a}', 'agrave'=> '\\`{a}', 225 => "\\'{a}", 'aacute'=> "\\'{a}", 226 => '\\^{a}', 'acirc' => '\\^{a}', 227 => '\\~{a}', 'atilde'=> '\\~{a}', 228 => '\\"{a}', 'auml' => '\\"{a}', 229 => '\aa', 'aring' => '\aa', 230 => '\ae', 'aelig' => '\ae', 231 => '\c{c}', 'ccedil'=> '\c{c}', 232 => '\\`{e}', 'egrave'=> '\\`{e}', 233 => "\\'{e}", 'eacute'=> "\\'{e}", 234 => '\\^{e}', 'ecirc' => '\\^{e}', 235 => '\\"{e}', 'euml' => '\\"{e}', 236 => '\\`{i}', 'igrave'=> '\\`{i}', 237 => "\\'{i}", 'iacute'=> "\\'{i}", 238 => '\\^{i}', 'icirc' => '\\^{i}', 239 => '\\"{i}', 'iuml' => '\\"{i}', 241 => '\\~{n}', 'ntilde'=> '\\~{n}', 242 => '\\`{o}', 'ograve'=> '\\`{o}', 243 => "\\'{o}", 'oacute'=> "\\'{o}", 244 => '\\^{o}', 'ocirc' => '\\^{o}', 245 => '\\~{o}', 'otilde'=> '\\~{o}', 246 => '\\"{o}', 'ouml' => '\\"{o}', 247 => '\ensuremath{\div}', 'divide'=> '\ensuremath{\div}', 248 => '{\o}', 'oslash'=> '{\o}', 249 => '\\`{u}', 'ugrave'=> '\\`{u}', 250 => "\\'{u}", 'uacute'=> "\\'{u}", 251 => '\\^{u}', 'ucirc' => '\\^{u}', 252 => '\\"{u}', 'uuml' => '\\"{u}', 253 => "\\'{y}", 'yacute'=> "\\'{y}", 255 => '\\"{y}', 'yuml' => '\\"{y}', # hbar entity number comes from the unicode character: 295 => '\ensuremath{\hbar}', 'planck' => '\ensuremath{\hbar}', # Latin extended-A HTML 4.01 entities: 338 => '\OE', 'OElig' => '\OE', 339 => '\oe', 'oelig' => '\oe', 352 => '\v{S}', 'Scaron' => '\v{S}', 353 => '\v{s}', 'scaron' => '\v{s}', 376 => '\\"{Y}', 'Yuml' => '\\"{Y}', # Latin extended B HTML 4.01 entities 402 => '\ensuremath{f}', 'fnof' => '\ensuremath{f}', # Spacing modifier letters: 710 => '\^{}', 'circ' => '\^{}', 732 => '\~{}', 'tilde' => '\~{}', # Greek uppercase: 913 => '\ensuremath{\mathrm{A}}', 'Alpha' => '\ensuremath{\mathrm{A}}', 914 => '\ensuremath{\mathrm{B}}', 'Beta' => '\ensuremath{\mathrm{B}}', 915 => '\ensuremath{\Gamma}', 'Gamma' => '\ensuremath{\Gamma}', 916 => '\ensuremath{\Delta}', 'Delta' => '\ensuremath{\Delta}', 917 => '\ensuremath{\mathrm{E}}', 'Epsilon'=> '\ensuremath{\mathrm{E}}', 918 => '\ensuremath{\mathrm{Z}}', 'Zeta' => '\ensuremath{\mathrm{Z}}', 919 => '\ensuremath{\mathrm{H}}', 'Eta' => '\ensuremath{\mathrm{H}}', 920 => '\ensuremath{\Theta}', 'Theta' => '\ensuremath{\Theta}', 921 => '\ensuremath{\mathrm{I}}', 'Iota' => '\ensuremath{\mathrm{I}}', 922 => '\ensuremath{\mathrm{K}}', 'Kappa' => '\ensuremath{\mathrm{K}}', 923 => '\ensuremath{\Lambda}', 'Lambda' => '\ensuremath{\Lambda}', 924 => '\ensuremath{\mathrm{M}}', 'Mu' => '\ensuremath{\mathrm{M}}', 925 => '\ensuremath{\mathrm{N}}', 'Nu' => '\ensuremath{\mathrm{N}}', 926 => '\ensuremath{\mathrm{\Xi}}', 'Xi' => '\ensuremath{\mathrm{\Xi}}', 927 => '\ensuremath{\mathrm{O}}', 'Omicron'=> '\ensuremath{\mathrm{O}}', 928 => '\ensuremath{\Pi}', 'Pi' => '\ensuremath{\Pi}', 929 => '\ensuremath{\mathrm{P}}', 'Rho' => '\ensuremath{\mathrm{P}}', 931 => '\ensuremath{\Sigma}', 'Sigma' => '\ensuremath{\Sigma}', 932 => '\ensuremath{\mathrm{T}}', 'Tau' => '\ensuremath{\mathrm{T}}', 933 => '\ensuremath{\Upsilon}', 'Upsilon'=> '\ensuremath{\Upsilon}', 934 => '\ensuremath{\Phi}', 'Phi' => '\ensuremath{\Phi}', 935 => '\ensuremath{\mathrm{X}}', 'Chi' => '\ensuremath{\mathrm{X}}', 936 => '\ensuremath{\Psi}', 'Psi' => '\ensuremath{\Psi}', 937 => '\ensuremath{\Omega}', 'Omega' => '\ensuremath{\Omega}', # Greek lowercase: 945 => '\ensuremath{\alpha}', 'alpha' => '\ensuremath{\alpha}', 946 => '\ensuremath{\beta}', 'beta' => '\ensuremath{\beta}', 947 => '\ensuremath{\gamma}', 'gamma' => '\ensuremath{\gamma}', 948 => '\ensuremath{\delta}', 'delta' => '\ensuremath{\delta}', 949 => '\ensuremath{\epsilon}', 'epsilon'=> '\ensuremath{\epsilon}', 950 => '\ensuremath{\zeta}', 'zeta' => '\ensuremath{\zeta}', 951 => '\ensuremath{\eta}', 'eta' => '\ensuremath{\eta}', 952 => '\ensuremath{\theta}', 'theta' => '\ensuremath{\theta}', 953 => '\ensuremath{\iota}', 'iota' => '\ensuremath{\iota}', 954 => '\ensuremath{\kappa}', 'kappa' => '\ensuremath{\kappa}', 955 => '\ensuremath{\lambda}', 'lambda' => '\ensuremath{\lambda}', 956 => '\ensuremath{\mu}', 'mu' => '\ensuremath{\mu}', 957 => '\ensuremath{\nu}', 'nu' => '\ensuremath{\nu}', 958 => '\ensuremath{\xi}', 'xi' => '\ensuremath{\xi}', 959 => '\ensuremath{o}', 'omicron'=> '\ensuremath{o}', 960 => '\ensuremath{\pi}', 'pi' => '\ensuremath{\pi}', 961 => '\ensuremath{\rho}', 'rho' => '\ensuremath{\rho}', 962 => '\ensuremath{\varsigma}', 'sigmaf' => '\ensuremath{\varsigma}', 963 => '\ensuremath{\sigma}', 'sigma' => '\ensuremath{\sigma}', 964 => '\ensuremath{\tau}', 'tau' => '\ensuremath{\tau}', 965 => '\ensuremath{\upsilon}', 'upsilon'=> '\ensuremath{\upsilon}', 966 => '\ensuremath{\phi}', 'phi' => '\ensuremath{\phi}', 967 => '\ensuremath{\chi}', 'chi' => '\ensuremath{\chi}', 968 => '\ensuremath{\psi}', 'psi' => '\ensuremath{\psi}', 969 => '\ensuremath{\omega}', 'omega' => '\ensuremath{\omega}', 977 => '\ensuremath{\vartheta}', 'thetasym'=>'\ensuremath{\vartheta}', 978 => '\ensuremath{\mathit{\Upsilon}}', 'upsih' => '\ensuremath{\mathit{\Upsilon}}', 982 => '\ensuremath{\varpi}', 'piv' => '\ensuremath{\varpi}', # The general punctuation set: 8194, => '\hspace{.5em}', 'enspc' => '\hspace{.5em}', 8195 => '\hspace{1.0em}', 'emspc' => '\hspace{1.0em}', 8201 => '\hspace{0.167em}', 'thinsp' => '\hspace{0.167em}', 8204 => '{}', 'zwnj' => '{}', 8205 => '', 'zwj' => '', 8206 => '', 'lrm' => '', 8207 => '', 'rlm' => '', 8211 => '--', 'ndash' => '--', 8212 => '---', 'mdash' => '---', 8216 => '`', 'lsquo' => '`', 8217 => "'", 'rsquo' => "'", 8218 => '\quotesinglbase', 'sbquo' => '\quotesinglbase', 8220 => '``', 'ldquo' => '``', 8221 => "''", 'rdquo' => "''", 8222 => '\quotedblbase', 'bdquo' => '\quotedblbase', 8224 => '\ensuremath{\dagger}', 'dagger' => '\ensuremath{\dagger}', '8225' => '\ensuremath{\ddag}', 'Dagger' => '\ensuremath{\ddag}', 8226 => '\textbullet', 'bull' => '\textbullet', 8230 => '\textellipsis', 'hellep' => '\textellipsis', 8240 => '\textperthousand', permil => '\textperthousand', 8242 => '\textquotesingle', 'prime' => '\textquotesingle', 8243 => '\textquotedbl', 'Prime' => '\textquotedbl', 8249 => '\guilsinglleft', 'lsaquo' => '\guilsinglleft', 8250 => '\guilsinglright', 'rsaquo' => '\guilsinglright', 8254 => '\textasciimacron', oline => '\textasciimacron', 8260 => '\textfractionsolidus', 'frasl' => '\textfractionsolidus', 8364 => '\texteuro', 'euro' => '\texteuro', # Letter like symbols 8462 => '\ensuremath{h}', 'planckh' => '\ensuremath{h}', 8463 => '\ensuremath{\hbar}', 'hbar' => '\ensuremath{\hbar}', 8472 => '\ensuremath{\wp}', 'weierp' => '\ensuremath{\wp}', 8465 => '\ensuremath{\Im}', 'image' => '\ensuremath{\Im}', 8476 => '\ensuremath{\Re}', 'real' => '\ensuremath{\Re}', 8482 => '\texttrademark', 'trade' => '\texttrademark', 8496 => '\ensuremath{\mathcal{E}}', 'expectation' => '\ensuremath{\mathcal{E}}', 8501 => '\ensuremath{\aleph}', 'alefsym'=> '\ensuremath{\aleph}', # Arrows and then some (harpoons from Hon Kie). 8592 => '\ensuremath{\leftarrow}', 'larr' => '\ensuremath{\leftarrow}', 8593 => '\ensuremath{\uparrow}', 'uarr' => '\ensuremath{\uparrow}', 8594 => '\ensuremath{\rightarrow}', 'rarr' => '\ensuremath{\rightarrow}', 'rightarrow' => '\ensuremath{\rightarrow}', 8595 => '\ensuremath{\downarrow}', 'darr' => '\ensuremath{\downarrow}', 8596 => '\ensuremath{\leftrightarrow}', 'harr' => '\ensuremath{\leftrightarrow}', 8598 => '\ensuremath{\nwarrow}', 8599 => '\ensuremath{\nearrow}', 8600 => '\ensuremath{\searrow}', 8601 => '\ensuremath{\swarrow}', 8605 => '\ensuremath{\leadsto}', 8614 => '\ensuremath{\mapsto}', 8617 => '\ensuremath{\hookleftarrow}', 8618 => '\ensuremath{\hookrightarrow}', 8629 => '\ensuremath{\hookleftarrow}', # not an exact match but best I know. 'crarr' => '\ensuremath{\hookleftarrow}', # not an exact match but best I know. 8636 => '\ensuremath{\leftharpoonup}', 8637 => '\ensuremath{\leftharpoondown}', 8640 => '\ensuremath{\rightharpoonup}', 8641 => '\ensuremath{\rightharpoondown}', 8652 => '\ensuremath{\rightleftharpoons}', 8656 => '\ensuremath{\Leftarrow}', 'lArr' => '\ensuremath{\Leftarrow}', 8657 => '\ensuremath{\Uparrow}', 'uArr' => '\ensuremath{\Uparrow}', 8658 => '\ensuremath{\Rightarrow}', 'rArr' => '\ensuremath{\Rightarrow}', 8659 => '\ensuremath{\Downarrow}', 'dArr' => '\ensuremath{\Downarrow}', 8660 => '\ensuremath{\Leftrightarrow}', 'hArr' => '\ensuremath{\Leftrightarrow}', 8661 => '\ensuremath{\Updownarrow}', 'vArr' => '\ensuremath{\Updownarrow}', 8666 => '\ensuremath{\Lleftarrow}', 'lAarr' => '\ensuremath{\Lleftarrow}', 8667 => '\ensuremath{\Rrightarrow}', 'rAarr' => '\ensuremath{\Rrightarrow}', 8669 => '\ensuremath{\rightsquigarrow}', 'rarrw' => '\ensuremath{\rightsquigarrow}', # Mathematical operators. 'forall' => '\ensuremath{\forall}', 8704 => '\ensuremath{\forall}', 'comp' => '\ensuremath{\complement}', 8705 => '\ensuremath{\complement}', 'part' => '\ensuremath{\partial}', 8706 => '\ensuremath{\partial}', 'exist' => '\ensuremath{\exists}', 8707 => '\ensuremath{\exists}', 'nexist' => '\ensuremath{\nexists}', 8708 => '\ensuremath{\nexists}', 'empty' => '\ensuremath{\emptyset}', 8709 => '\ensuremath{\emptyset}', 8710 => '\ensuremath{\Delta}', 'nabla' => '\ensuremath{\nabla}', 8711 => '\ensuremath{\nabla}', 'isin' => '\ensuremath{\in}', 8712 => '\ensuremath{\in}', 'notin' => '\ensuremath{\notin}', 8713 => '\ensuremath{\notin}', ni => '\ensuremath{\ni}', 8715 => '\ensuremath{\ni}', 8716 => '\ensuremath{\not\ni}', 'prod' => '\ensuremath{\prod}', 8719 => '\ensuremath{\prod}', 8720 => '\ensuremath{\coprod}', 'sum' => '\ensuremath{\sum}', 8721 => '\ensuremath{\sum}', 'minus' => '\ensuremath{-}', 8722 => '\ensuremath{-}', 8723 => '\ensuremath{\mp}', 8724 => '\ensuremath{\dotplus}', 8725 => '\ensuremath{\diagup}', 8726 => '\ensuremath{\smallsetminus}', 'lowast' => '\ensuremath{*}', 8727 => '\ensuremath{*}', 8728 => '\ensuremath{\circ}', 8729 => '\ensuremath{\bullet}', 'radic' => '\ensuremath{\surd}', 8730 => '\ensuremath{\surd}', 8731 => '\ensuremath{\sqrt[3]{}}', 8732 => '\ensuremath{\sqrt[4]{}}', 'prop' => '\ensuremath{\propto}', 8733 => '\ensuremath{\propto}', 'infin' => '\ensuremath{\infty}', 8734 => '\ensuremath{\infty}', # The items below require the isoent latex package which I can't find at least for FC5. # Temporarily commented out. 'ang90' => '\ensuremath{\sqangle}', 8735 => '\ensuremath{\sqangle}', 'ang' => '\ensuremath{\angle}', 8736 => '\ensuremath{\angle}', 'angmsd' => '\ensuremath{\measuredangle}', 8737 => '\ensuremath{\measuredangle}', 'angsph' => '\ensuremath{\sphericalangle}', 8738 => '\ensuremath{\sphericalangle}', 8739 => '\ensuremath{\vert}', 8740 => '\ensuremath{\Vert}', 'and' => '\ensuremath{\land}', 8743 => '\ensuremath{\land}', 'or' => '\ensuremath{\lor}', 8744 => '\ensuremath{\lor}', 'cap' => '\ensuremath{\cap}', 8745 => '\ensuremath{\cap}', 'cup' => '\ensuremath{\cup}', 8746 => '\ensuremath{\cup}', 'int' => '\ensuremath{\int}', 8747 => '\ensuremath{\int}', 'conint' => '\ensuremath{\oint}', 8750 => '\ensuremath{\oint}', 'there4' => '\ensuremath{\therefore}', 8756 => '\ensuremath{\therefore}', 'becaus' => '\ensuremath{\because}', 8757 => '\ensuremath{\because}', 8758 => '\ensuremath{:}', 8759 => '\ensuremath{::}', 'sim' => '\ensuremath{\sim}', 8764 => '\ensuremath{\sim}', 8765 => '\ensuremath{\backsim}', 'wreath' => '\ensuremath{\wr}', 8768 => '\ensuremath{\wr}', 'nsim' => '\ensuremath{\not\sim}', 8769 => '\ensuremath{\not\sim}', # 'asymp' => '\ensuremath{\asymp}', ≈ is actually a different glyph. 8771 => '\ensuremath{\asymp}', 8772 => '\ensuremath{\not\asymp}', 'cong' => '\ensuremath{\cong}', 8773 => '\ensuremath{\cong}', 8775 => '\ensuremath{\ncong}', 8776 => '\ensuremath{\approx}', 'approx' => '\ensuremath{\approx}', 8778 => '\ensuremath{\approxeq}', 'approxeq' => '\ensuremath{\approxeq}', 8784 => '\ensuremath{\doteq}', 8785 => '\ensuremath{\doteqdot}', 8786 => '\ensuremath{\fallingdotseq}', 8787 => '\ensuremath{\risingdotseq}', 8788 => '\ensuremath{:=}', 8789 => '\ensuremath{=:}', 8790 => '\ensuremath{\eqcirc}', 8791 => '\ensuremath{\circeq}', 'wedgeq' => '\ensuremath{\stackrel{\wedge}{=}}', 8792 => '\ensuremath{\stackrel{\wedge}{=}}', 8794 => '\ensuremath{\stackrel{\vee}{=}}', 8795 => '\ensuremath{\stackrel{\star}{=}}', 8796 => '\ensuremath{\triangleq}', 8797 => '\ensuremath{\stackrel{def}{=}}', 8798 => '\ensuremath{\stackrel{m}{=}}', 8799 => '\ensuremath{\stackrel{?}{=}}', 'ne' => '\ensuremath{\neq}', 8800 => '\ensuremath{\neq}', 'equiv' => '\ensuremath{\equiv}', 8801 => '\ensuremath{\equiv}', 8802 => '\ensuremath{\not\equiv}', 'le' => '\ensuremath{\leq}', 8804 => '\ensuremath{\leq}', 'ge' => '\ensuremath{\geq}', 8805 => '\ensuremath{\geq}', 8806 => '\ensuremath{\leqq}', 8807 => '\ensuremath{\geqq}', 8810 => '\ensuremath{\ll}', 8811 => '\ensuremath{\gg}', 'twixt' => '\ensuremath{\between}', 8812 => '\ensuremath{\between}', 8813 => '\ensuremath{\not\asymp}', 8814 => '\ensuremath{\not<}', 8815 => '\ensuremath{\not>}', 8816 => '\ensuremath{\not\leqslant}', 8817 => '\ensuremath{\not\geqslant}', 8818 => '\ensuremath{\lesssim}', 8819 => '\ensuremath{\gtrsim}', 8820 => '\ensuremath{\stackrel{<}{>}}', 8821 => '\ensuremath{\stackrel{>}{<}}', 8826 => '\ensuremath{\prec}', 8827 => '\ensuremath{\succ}', 8828 => '\ensuremath{\preceq}', 8829 => '\ensuremath{\succeq}', 8830 => '\ensuremath{\not\prec}', 8831 => '\ensuremath{\not\succ}', 'sub' => '\ensuremath{\subset}', 8834 => '\ensuremath{\subset}', 'sup' => '\ensuremath{\supset}', 8835 => '\ensuremath{\supset}', 'nsub' => '\ensuremath{\not\subset}', 8836 => '\ensuremath{\not\subset}', 8837 => '\ensuremath{\not\supset}', 'sube' => '\ensuremath{\subseteq}', 8838 => '\ensuremath{\subseteq}', 'supe' => '\ensuremath{\supseteq}', 8839 => '\ensuremath{\supseteq}', 8840 => '\ensuremath{\nsubseteq}', 8841 => '\ensuremath{\nsupseteq}', 8842 => '\ensuremath{\subsetneq}', 8843 => '\ensuremath{\supsetneq}', 8847 => '\ensuremath{\sqsubset}', 8848 => '\ensuremath{\sqsupset}', 8849 => '\ensuremath{\sqsubseteq}', 8850 => '\ensuremath{\sqsupseteq}', 8851 => '\ensuremath{\sqcap}', 8852 => '\ensuremath{\sqcup}', 'oplus' => '\ensuremath{\oplus}', 8853 => '\ensuremath{\oplus}', 8854 => '\ensuremath{\ominus}', 'otimes' => '\ensuremath{\otimes}', 8855 => '\ensuremath{\otimes}', 8856 => '\ensuremath{\oslash}', 8857 => '\ensuremath{\odot}', 8858 => '\ensuremath{\circledcirc}', 8859 => '\ensuremath{\circledast}', 8861 => '\ensuremath{\ominus}', # Close enough for government work. 8862 => '\ensuremath{\boxplus}', 8863 => '\ensuremath{\boxminus}', 8864 => '\ensuremath{\boxtimes}', 8865 => '\ensuremath{\boxdot}', 'vdash' => '\ensuremath{\vdash}', 8866 => '\ensuremath{\vdash}', 'dashv' => '\ensuremath{\dashv}', 8867 => '\ensuremath{\dashv}', 'perp' => '\ensuremath{\perp}', 8869 => '\ensuremath{\perp}', 8871 => '\ensuremath{\models}', 8872 => '\ensuremath{\vDash}', 8873 => '\ensuremath{\Vdash}', 8874 => '\ensuremath{\Vvdash}', 8876 => '\ensuremath{\nvdash}', 8877 => '\ensuremath{\nvDash}', 8878 => '\ensuremath{\nVdash}', 8880 => '\ensuremath{\prec}', 8881 => '\ensuremath{\succ}', 8882 => '\ensuremath{\vartriangleleft}', 8883 => '\ensuremath{\vartriangleright}', 8884 => '\ensuremath{\trianglelefteq}', 8885 => '\ensuremath{\trianglerighteq}', 8891 => '\ensuremath{\veebar}', 8896 => '\ensuremath{\land}', 8897 => '\ensuremath{\lor}', 8898 => '\ensuremath{\cap}', 8899 => '\ensuremath{\cup}', 8900 => '\ensuremath{\diamond}', 'sdot' => '\ensuremath{\cdot}', 8901 => '\ensuremath{\cdot}', 8902 => '\ensuremath{\star}', 8903 => '\ensuremath{\divideontimes}', 8904 => '\ensuremath{\bowtie}', 8905 => '\ensuremath{\ltimes}', 8906 => '\ensuremath{\rtimes}', 8907 => '\ensuremath{\leftthreetimes}', 8908 => '\ensuremath{\rightthreetimes}', 8909 => '\ensuremath{\simeq}', 8910 => '\ensuremath{\curlyvee}', 8911 => '\ensuremath{\curlywedge}', 8912 => '\ensuremath{\Subset}', 8913 => '\ensuremath{\Supset}', 8914 => '\ensuremath{\Cap}', 8915 => '\ensuremath{\Cup}', 8916 => '\ensuremath{\pitchfork}', 8918 => '\ensuremath{\lessdot}', 8919 => '\ensuremath{\gtrdot}', 8920 => '\ensuremath{\lll}', 8921 => '\ensuremath{\ggg}', 8922 => '\ensuremath{\gtreqless}', 8923 => '\ensuremath{\lesseqgtr}', 8924 => '\ensuremath{\eqslantless}', 8925 => '\ensuremath{\eqslantgtr}', 8926 => '\ensuremath{\curlyeqprec}', 8927 => '\ensuremath{\curlyeqsucc}', 8928 => '\ensuremath{\not\preccurlyeq}', 8929 => '\ensuremath{\not\succcurlyeq}', 8930 => '\ensuremath{\not\sqsupseteq}', 8931 => '\ensuremath{\not\sqsubseteq}', 8938 => '\ensuremath{\not\vartriangleleft}', 8939 => '\ensuremath{\not\vartriangleright}', 8940 => '\ensuremath{\not\trianglelefteq}', 8941 => '\ensuremath{\not\trianglerighteq}', 8942 => '\ensuremath{\vdots}', 8960 => '\ensuremath{\varnothing}', 'lceil' => '\ensuremath{\lceil}', 8968 => '\ensuremath{\lceil}', 'rceil' => '\ensuremath{\rceil}', 8969 => '\ensuremath{\rceil}', 'lfloor' => '\ensuremath{\lfloor}', 8970 => '\ensuremath{\lfloor}', 'rfloor' => '\ensuremath{\rfloor}', 8971 => '\ensuremath{\rfloor}', 'lang' => '\ensuremath{\langle}', 9001 => '\ensuremath{\langle}', 'rang' => '\ensuremath{\rangle}', 9002 => '\ensuremath{\rangle}', 'loz' => '\ensuremath{\lozenge}', 9674 => '\ensuremath{\lozenge}', 'spades' => '\ensuremath{\spadesuit}', 9824 => '\ensuremath{\spadesuit}', 9825 => '\ensuremath{\heartsuit}', 9826 => '\ensuremath{\diamondsuit}', 'clubs' => '\ensuremath{\clubsuit}', 9827 => '\ensuremath{\clubsuit}', 'diams' => '\ensuremath{\blacklozenge}', 9830 => '\ensuremath{\blacklozenge}' ); =pod =head1 UNICODE TABLE =over There are some named entities that don't have a good latex equivalent, these are converted to utf-8 via this table of entity name -> unicode number. =back =cut my %utf_table = ( 'THORN' => 222, 'thorn' => 254, 'eth' => 240, 'hearts' => 9829 ); sub entity_to_utf8 { my ($unicode) = @_; my $result = pack("U", $unicode); return $result; } sub entity_to_latex { my ($entity) = @_; # Try to look up the entity (text or numeric) in the hash: my $latex = $entities{"$entity"}; if (defined $latex) { return $latex; } # If the text is purely numeric we can do the UTF-8 conversion: # Otherwise there are a few textual entities that don't have good latex # which can be converted to unicode: # if ($entity =~ /^\d+$/) { return &entity_to_utf8($entity); } else { my $result = $utf_table{"$entity"}; if (defined $result) { return &entity_to_utf8($result); } } # Can't do the conversion`< ... return " "; } sub replace_entities { my ($input) = @_; my $start; my $end; my $entity; my $latex; # First the &#nnn; entities: while ($input =~ /(&\#\d+;)/) { ($start) = @-; ($end) = @+; $entity = substr($input, $start+2, $end-$start-3); $latex = &entity_to_latex($entity); substr($input, $start, $end-$start) = $latex; } # Hexadecimal entities: while ($input =~ /&\#x(\d|[a-f,A-f])+;/) { ($start) = @-; ($end) = @+; $entity = "0" . substr($input, $start+2, $end-$start-3); # 0xhexnumber $latex = &entity_to_latex(hex($entity)); substr($input, $start, $end-$start) = $latex; } # Now the &text; entites; while ($input =~/(&\w+;)/) { ($start) = @-; ($end) = @+; $entity = substr($input, $start+1, $end-$start-2); $latex = &entity_to_latex($entity); substr($input, $start, $end-$start) = $latex; } return $input; } 1; __END__ =pod =head1 NAME Apache::entities.pm =head1 SYNOPSIS This file contains a table driven entity-->latex converter. This is part of the LearningOnline Network with CAPA project described at http://www.lon-capa.org. =head1 OVERVIEW Assumptions: The number of entities in a resource is small compared with the number of possible entities that might be translated. Therefore the strategy is to match a general entity pattern &.+; over and over, pull out the match look it up in an entity -> tex hash and do the replacement. In order to simplify the hash, the following reductions are done: &#d+; have the &# and ; stripped and is converted to an int. &#.+; have the &#x and ; stripped and is converted to an int as a hex value. All others have the & and ; stripped. The hash: Add new conversions here; leave off the leading & and the trailing ; all numeric entities need only appear as their decimal versions (e.g. no need for 1234 is sufficient, no need for 0x4d2 as well. This entity table is mercilessly cribbed from the HTML pocket reference table starting at pg 82. In most cases the LaTeX equivalent codes come from the original massive regular expression replacements originally by A. Sakharuk in lonprintout.pm I also want to acknowledge ISO Character entities and their LaTeX equivalents by Vidar Bronken Gundersen, and Rune Mathisen http://www.bitjungle.com/isoent-ref.pdf Note numerical entities are essentially unicode character codes. =head1 SUBROUTINES =over =item entity_to_utf8() Convert a numerical entity (that does not exist in our hash) to its UTF-8 equivalent representation. This allows us to support, to some extent, any entity for which dvipdf can find a gylph (given that LaTeX is now UTF-8 clean). Parameters: unicode - The unicode for the character. This is assumed to be a decimal value Returns: The UTF-8 equiavalent of the value. =item entity_to_latex() Convert an entity to the corresponding LateX if possible. If not possible, and the entity is numeric, the entity is treated like a Unicode character and converted to UTF-8 which should display as long as dvipdf can find the appropriate glyph. The entity is assumed to have already had the &; or & ; removed Parameters: entity - Name of entity to convert. Returns: One of the following: - Latex string that produces the entity. - UTF-8 equivalent of a numeric entity for which we don't have a latex string. - ' ' for text entities for which there's no latex equivalent. =item replace_entities() Convert all the entities in a string. We locate all the entities, pass them into entity_to_latex and and replace occurences in the input string. The assumption is that there are few entities in any string/document so this looping is not too bad. The advantage of looping vs. regexping is that we now can use lookup tables for the translation in entity_to_latex above. Parameters: input - Input string/document Returns input with entities replaced by latexable stuff (UTF-8 encodings or latex control strings to produce the entity. =back =cut