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269 {\bbl@tempa}% 270 {\noexpand\bbl@load@language{\bbl@tempa}}}% 271 \bbl@tempb}% 272 \@empty} Now, we make sure an option is explicitly declared for any language set as global option, by checking if an ldf exists. The previous step was, in fact, somewhat redundant, but that way we minimize accesing the file system just to see if the option could be a language. 273 \bbl@for\bbl@tempa\@classoptionslist{% 274 \@ifundefined{ds@\bbl@tempa}% 275 {\IfFileExists{\bbl@tempa.ldf}% 276 {\edef\bbl@tempb{% 277 \noexpand\DeclareOption 278 {\bbl@tempa}% 279 {\noexpand\bbl@load@language{\bbl@tempa}}}% 280 \bbl@tempb}% 281 \@empty}% 282 \@empty} If a main language has been set, store it for the third pass. 283 \ifx\bbl@opt@main\@nnil\else 284 \expandafter 285 \let\expandafter\bbl@loadmain\csname ds@\bbl@opt@main\endcsname 286 \DeclareOption{\bbl@opt@main}{} 287 \fi And we are done, because all options for this pass has been declared. Those already processed in the first pass are just ignored. The options have to be processed in the order in which the user specified them (except, of course, global options, which L A T E X processes before): 288 \def\AfterBabelLanguage#1{% 289 \bbl@ifsamestring\CurrentOption{#1}{\global\bbl@add\bbl@afterlang}{}} 290 \DeclareOption*{} 291 \ProcessOptions* This finished the second pass. Now the third one begins, which loads the main language set with the key main. A warning is raised if the main language is not the same as the last named one, or if the value of the key main is not a language. Then execute directly the option (because it could be used only in main). After loading all languages, we deactivate \AfterBabelLanguage. 292 \ifx\bbl@opt@main\@nnil 293 \edef\bbl@tempa{\@classoptionslist,\bbl@language@opts} 294 \let\bbl@tempc\@empty 295 \bbl@for\bbl@tempb\bbl@tempa{% 296 \@expandtwoargs\in@{,\bbl@tempb,}{,\bbl@loaded,}% 297 \ifin@\edef\bbl@tempc{\bbl@tempb}\fi} 298 \def\bbl@tempa#1,#2\@nnil{\def\bbl@tempb{#1}} 299 \expandafter\bbl@tempa\bbl@loaded,\@nnil 300 \ifx\bbl@tempb\bbl@tempc\else 301 \bbl@warning{% 302 Last declared language option is ‘\bbl@tempc,\\% 303 but the last processed one was ‘\bbl@tempb’.\\% 304 The main language cannot be set as both a global\\% 305 and a package option. Use ‘main=\bbl@tempc’ as\\% 306 option. Reported}% 307 \fi 39
308 \else 309 \DeclareOption{\bbl@opt@main}{\bbl@loadmain} 310 \ExecuteOptions{\bbl@opt@main} 311 \DeclareOption*{} 312 \ProcessOptions* 313 \fi 314 \def\AfterBabelLanguage{% 315 \bbl@error 316 {Too late for \string\AfterBabelLanguage}% 317 {Languages have been loaded, so I can do nothing}} In order to catch the case where the user forgot to specify a language we check whether \bbl@main@language, has become defined. If not, no language has been loaded and an error message is displayed. 318 \ifx\bbl@main@language\@undefined 319 \bbl@error{% 320 You haven’t specified a language option}{% 321 You need to specify a language, either as a global option\\% 322 or as an optional argument to the \string\usepackage\space 323 command;\\% 324 You shouldn’t try to proceed from here, type x to quit.} 325 \fi 326 〈/package〉 7 The Kernel of Babel The kernel of the babel system is stored in either hyphen.cfg or switch.def and babel.def. The file babel.def contains most of the code, while switch.def defines the language switching commands; both can be read at run time. The file hyphen.cfg is a file that can be loaded into the format, which is necessary when you want to be able to switch hyphenation patterns (by default, it also inputs switch.def, for “historical reasons”, but it is not necessary). When babel.def is loaded it checks if the current version of switch.def is in the format; if not it is loaded. A further file, babel.sty, contains L A T E X-specific stuff. Because plain T E X users might want to use some of the features of the babel system too, care has to be taken that plain T E X can process the files. For this reason the current format will have to be checked in a number of places. Some of the code below is common to plain T E X and L A T E X, some of it is for the L A T E X case only. 7.1 Tools \bbl@engine takes the following values: 0 is pdfT E X, 1 is luatex, and 2 is xetex. You may use it in your language style if necessary. 327 〈∗core〉 328 〈〈Make sure ProvidesFile is defined〉〉 329 \ProvidesFile{babel.def}[〈〈date〉〉〈〈version〉〉 Babel common definitions] 330 〈〈Load macros for plain if not LaTeX〉〉 331 〈〈Load switch if newer〉〉 332 〈〈Basic macros〉〉 333 \ifx\bbl@opt@strings\@undefined 334 \def\bbl@opt@safe{BR} 335 \let\bbl@opt@strings\@nnil 40
Page 1 and 2: Babel Version 3.9h 2013/12/03 Origi
Page 3 and 4: 7.7 Support for saving macro defini
Page 5 and 6: with a different name, sometimes it
Page 7 and 8: (eg, italian, frenchb, ukraineb). T
Page 9 and 10: \defineshorthand [〈language〉,
Page 11 and 12: 1.5 Package options New 3.9 These p
Page 13 and 14: This command is currently the only
Page 15 and 16: • \babelhyphen{〈text〉} is a h
Page 17 and 18: {\dn devaanaa.m priya.h} \end{docum
Page 19 and 20: \setmainfont[Language=Turkish]{Mini
Page 21 and 22: • Avoid adding things to \noextra
Page 23 and 24: \StartBabelCommands*{}{captions} \S
Page 25 and 26: 3.7 Encoding-dependent strings New
Page 27 and 28: option, then the default for the en
Page 29 and 30: Although the babel system was devel
Page 31 and 32: • Support for typesetting the rus
Page 33 and 34: The following code is used in babel
Page 35 and 36: 63 \global\expandafter\bbl@add\csna
Page 37 and 38: 138 \ifx#1\@empty\else 139 \ifx#1t\
Page 39: 225 \DeclareOption{french}{\bbl@loa
Page 43 and 44: \bbl@redefinerobust For commands th
Page 45 and 46: 424 \catcode‘\==\eqcatcode \let\e
Page 47 and 48: The following macro is used to defi
Page 49 and 50: 533 \bbl@csarg\edef{active@#2}{% 53
Page 51 and 52: \declare@shorthand The command \dec
Page 53 and 54: 660 {\expandafter\ifx\csname active
Page 55 and 56: 740 \catcode‘\^=7 \catcode‘\*=\
Page 57 and 58: The we need to check the list of kn
Page 59 and 60: 856 \else 857 \frenchspacing 858 \l
Page 61 and 62: 922 \def\bbl@hy@hard{\bbl@usehyphen
Page 63 and 64: 7.13 Letters \ij \IJ The dutch lang
Page 65 and 66: 1063 \ProvideTextCommand{\frqq}{OT1
Page 67 and 68: Now we define \SetStringLoop. The c
Page 69 and 70: 1218 \fi 1219 \ifx\bbl@opt@strings\
Page 71 and 72: 1310 \expandafter\bbl@tempa 1311 \f
Page 73 and 74: \@testdef An internal L A T E X mac
Page 75 and 76: 1419 \def\bbl@bibcite#1#2{% 1420 \o
Page 77 and 78: piece of code: % \ifthenelse{\isodd
Page 79 and 80: 7.21.5 fancyhdr \FOREIGNLANGUAGE Th
Page 81 and 82: article : both the \chapter and \op
Page 83 and 84: The next case is formed by the two
Page 85 and 86: We also need to redefine a number o
Page 87 and 88: group. It calls \bbl@set@language w
Page 89 and 90: 1835 \originalTeX 1836 \expandafter
Page 91 and 92:
It also sets hyphenation exceptions
Page 93 and 94:
\@noopterr When the package was loa
Page 95 and 96:
\process@line \process@synonym 2041
Page 97 and 98:
Now, hooks are defined. For efficie
Page 99 and 100:
2174 \let\bbl@hook@everylanguage\@u
Page 101 and 102:
9.2 Emulating some L A T E X featur
Page 103 and 104:
2303 \advance \@tempcnta \@ne 2304
Page 105 and 106:
Code from ltoutenc.dtx, adapted for
Page 107 and 108:
2502 #2% 2503 % \@use@text@encoding
Page 109 and 110:
2580 end 2581 } 2582 \def\BabelStri
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