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|
% textalpha: Greek symbols in text
% ********************************
%
% :Copyright: © 2010 Günter Milde
% :Licence: This work may be distributed and/or modified under the
% conditions of the `LaTeX Project Public License`_, either
% version 1.3 of this license or any later version.
%
% :Abstract: Provide a set of ``\text*`` macros for Greek characters
% in text mode.
%
% :Identification:
% ::
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{textalpha}
[2013/11/28 v0.11 macros for Greek letters in text]
% .. note::
%
% The package was renamed from `textgreek` to `textalpha` to prevent
% confusion with the textgreek_ package by Leonard Michlmayr.
%
%
% Changelog:
% .. class:: borderless
%
% ========== ===== =========================================================
% 2010-06-16 0.1 initial version
% 2012-06-27 0.2 support for compound Unicode definitions outside LGR
% 2013-05-03 0.3 new accent macro names with ``lgrxenc.def`` 0.7
% 2013-05-28 0.4 use ``lgrenc.def`` from greek-fontenc.
% 2013-09-11 0.5 move to greek-fontenc_,
% .. support XeTeX/LuaTeX, add breve below accents.
% 2013-11-28 0.11 Compatibility with Xe/LuaTeX in 8-bit mode.
% ========== ===== =========================================================
%
% Motivation
% ==========
%
% By default, TeX macros for Greek letters are only valid in mathematical
% mode. This package sets up a suitable font encoding and Greek LICR
% definitions (``\textalpha`` -- ``\textOmega``).
%
% To allow documents using Greek LICR macros without worrying about the TeX
% engine used to compile them, this package tests the declared font encodings
% and does "the right thing" to set up Greek text font support:
%
% * If the Unicode font encodings EU1 (XeTeX) or EU2 (LuaTeX) are declared,
% before loading this package (e.g. vie ``fontspec``) the package provides
% Greek LICR definitions for them.
%
% * If the LGR font encoding is declared before loading this package, it is
% set as default for Greek LICR macros (cf. fntguide_ section 5.3).
%
% With XeTeX or LuaTex, Unicode fonts and LGR encoded 8-bit fonts can be
% used in the same document (see test-euenc.tex_).
%
% Advantages:
%
% * Symbols from a Greek text font (e.g. the `CB fonts`_) can be accessed
% without the need for an explicite font-encoding switch anywhere in the
% text.
%
% * Unicode input of Greek characters is supported
%
% + via ``\usepackage[utf8]{inputenc}`` and ``lgrenc.dfu`` from
% greek-inputenc_ for 8-bit TeX or XeTeX/LuaTeX in 8-bit compatibility
% mode in any font encoding (see textalpha-test.tex_).
%
% + natively by XeTeX/LuaTeX for Unicode fonts. As inputenc_ does not work
% with these engines, text input can be done via the Latin transcription
% or LICR but *not via literal Unicode characters* for 8-bit font encodings
% like LGR (see test-euenc.tex_).
%
% .. Attention:: The macros work well in any font encoding for single symbols.
% However, with 8-bit TeX engines, the automatic font-encoding switches
% behind the doors interfere with kerning between letters and replacement
% of accent+character with a pre-composed character.
%
% Therefore, Greek text should be written with the help of babel_ or
% polyglossia_ (setting the language to ``greek``) or wrapped in the
% provided ``ensuregreek`` macro. Using babel_ or polyglossia_ also helps
% to ensure correct hyphenation of Greek text.
%
%
% Usage
% =====
%
% .. code:: latex
%
% \usepackage{textalpha}
%
% For details see `<textalpha-test.tex>`_ and `<textalpha-test.pdf>`_ (8-bit
% TeX and XeTeX/LuaTeX in 8-bit compatibility mode) as well as
% `<test-euenc.tex>`_ and `<test-euenc.pdf>`_ (XeTeX/LuaTeX with Unicode
% fonts).
%
%
% Implementation
% ==============
%
% Requirements
% ------------
%
% With XeTeX or LuaTeX, there is one common input and font encoding --
% Unicode. 8-bit TeX font encodings are only used in compatibility mode or for
% fonts not available otherwise. For compatibility with the LaTeX font
% selection system, the package euenc_ defines the (pseudo) font encodings EU1
% and EU2 for XeTeX and LuaTeX respectively. However euenc does not (yet)
% define LICR macros. We therefore explicitely load Greek LICR definitions for
% XeTeX/LuaTeX from `greek-euenc.def <greek-euenc.def.html>`_ which in turn
% includes `greek-fontenc.def <greek-fontenc.def.html>`_.
%
% With 8-bit LaTeX, the LGR font encoding is used for Greek characters. If no
% Greek-supporting font encoding (EU1, EU2, or LGR) is declared, LGR is loaded
% and set up as default Greek font encoding by this package.
%
% To give ``textalpha.sty`` a chance of finding out which font encodings are
% used, load it after fontspec_ and/or fontenc_.
%
% Font encodings
% """"""""""""""
%
% Ensure a Greek-supporting font encoding exists and supports Greek LICR
% macros:
%
% Load the Greek LICR definitions for Unicode if font encoding EU1 (XeTeX) or
% EU2 (LuaTeX) is detected. [#EU]_ In an ideal world, this would be done in
% the ``eu1enc.def`` (or ``eu2enc.def``) file of the euenc_ package. If none
% of EU1, EU2, and LGR is declared, load ``lgrenc.def``:
%
% Re-set the ``\LastDeclaredEncoding``: Because fontenc loads font
% encoding definition files only once, it may happen that another font
% encoding is defined afterwards --- for example fontspec_ leaves
% ``\LastDeclaredEncoding`` at ``T3`` (tipa), because it inputs the xunicode_
% package which in turn loads ``t3enc.def``. ::
\@ifl@aded{def}{eu1enc}{
\renewcommand{\LastDeclaredEncoding}{EU1}
\input{greek-euenc.def}
}{% else
\@ifl@aded{def}{eu2enc}{
\renewcommand{\LastDeclaredEncoding}{EU2}
\input{greek-euenc.def}
}{% else
\@ifl@aded{def}{lgrenc}{
% LGR already declared and set up
}{
\input{lgrenc.def}
}
}
}
% .. [#EU] The two different (pseudo) font encodings allow different font setups for
% XeTeX vs. LuaTeX using differently named ``*.fd`` files (see euenc_ for
% details).
%
%
% The package hyperref_ defines the PU font encoding which also supports
% (monotonic) Greek. It currently misses polytonic greek and the
% ``\greekscript`` and ``\ensuregreek`` TextCommands::
\@ifl@aded{def}{puenc}
{\ProvideTextCommand{\greekscript}{PU}{}
\ProvideTextCommand{\ensuregreek}{PU}[1]{#1}}
{}
% Default declarations
% --------------------
%
% The following definitions ensure that the Greek LICR macros can be used
% anywhere in the document also with 8-bit TeX by declaring LGR as their
% default font encoding. Abort here, if another Greek-supporting
% font encoding is used instead of LGR::
\@ifl@aded{def}{lgrenc}
{\renewcommand{\LastDeclaredEncoding}{LGR}}
{\expandafter\endinput} % "return"
% greekscript, ensuregreek
% """"""""""""""""""""""""
%
% The ``\greekscript`` declaration ensures the current font encoding supports
% the Greek script. ``greek-fontenc.def`` sets this to the empty declaration
% for font encodings that do so. This is currently used by ``lgrenc.def``
% (LGR) and ``greek-euenc.def`` (Greek LICR macros for EU1 and EU2).
%
%
% We define LGR as default encoding for Greek text. We use
% ``\ProvideTextCommandDefault`` to enable the author or other packages to use
% an alternative definition (see [fntguide_])::
\ProvideTextCommandDefault{\greekscript}{\fontencoding{LGR}\selectfont}
% The ``\ensuregreek`` command can be used to ensure that its argument is set in
% a font encoding with support for Greek. Again the default is LGR::
\ProvideTextCommandDefault{\ensuregreek}[1]{\leavevmode{\greekscript #1}}
% .. The [fntguide_] writes
%
% Note that ``\DeclareTextAccentDefault`` can be used on any
% one-argument encoding-specific command, not just those defined with
% ``\DeclareTextAccent``.
%
% However, the simpler alternative
% ``\DeclareTextAccentDefault{\ensuregreek}{LGR}`` fails with the table of
% Unicode characters in the test document `<textalpha-test.tex>`__:
%
% ``! You can't use a prefix with `end-group character }'.``
%
% Eventually, all font encodings supporting Greek script (e.g. LGI, PU, EU1,
% EU2) will declare ``\ensuregreek`` as text command that passes the argument
% unchanged. This way, kerning and selection of precomposed glyphs would work
% also for cases like ``\ensuregreek{\'A}U``.
%
%
% Greek Alphabet
% """"""""""""""
%
% Define the ``text*`` marcos as default for all font encodings::
\DeclareTextSymbolDefault{\textAlpha}{LGR}
\DeclareTextSymbolDefault{\textBeta}{LGR}
\DeclareTextSymbolDefault{\textGamma}{LGR}
\DeclareTextSymbolDefault{\textDelta}{LGR}
\DeclareTextSymbolDefault{\textEpsilon}{LGR}
\DeclareTextSymbolDefault{\textZeta}{LGR}
\DeclareTextSymbolDefault{\textEta}{LGR}
\DeclareTextSymbolDefault{\textTheta}{LGR}
\DeclareTextSymbolDefault{\textIota}{LGR}
\DeclareTextSymbolDefault{\textKappa}{LGR}
\DeclareTextSymbolDefault{\textLambda}{LGR}
\DeclareTextSymbolDefault{\textMu}{LGR}
\DeclareTextSymbolDefault{\textNu}{LGR}
\DeclareTextSymbolDefault{\textXi}{LGR}
\DeclareTextSymbolDefault{\textOmicron}{LGR}
\DeclareTextSymbolDefault{\textPi}{LGR}
\DeclareTextSymbolDefault{\textRho}{LGR}
\DeclareTextSymbolDefault{\textSigma}{LGR}
\DeclareTextSymbolDefault{\textTau}{LGR}
\DeclareTextSymbolDefault{\textUpsilon}{LGR}
\DeclareTextSymbolDefault{\textPhi}{LGR}
\DeclareTextSymbolDefault{\textChi}{LGR}
\DeclareTextSymbolDefault{\textPsi}{LGR}
\DeclareTextSymbolDefault{\textOmega}{LGR}
%
\DeclareTextSymbolDefault{\textalpha}{LGR}
\DeclareTextSymbolDefault{\textbeta}{LGR}
\DeclareTextSymbolDefault{\textgamma}{LGR}
\DeclareTextSymbolDefault{\textdelta}{LGR}
\DeclareTextSymbolDefault{\textepsilon}{LGR}
\DeclareTextSymbolDefault{\textzeta}{LGR}
\DeclareTextSymbolDefault{\texteta}{LGR}
\DeclareTextSymbolDefault{\texttheta}{LGR}
\DeclareTextSymbolDefault{\textiota}{LGR}
\DeclareTextSymbolDefault{\textkappa}{LGR}
\DeclareTextSymbolDefault{\textlambda}{LGR}
\DeclareTextSymbolDefault{\textmu}{LGR}
\DeclareTextSymbolDefault{\textnu}{LGR}
\DeclareTextSymbolDefault{\textxi}{LGR}
\DeclareTextSymbolDefault{\textomicron}{LGR}
\DeclareTextSymbolDefault{\textpi}{LGR}
\DeclareTextSymbolDefault{\textrho}{LGR}
\DeclareTextSymbolDefault{\textsigma}{LGR}
\DeclareTextSymbolDefault{\textvarsigma}{LGR}
\DeclareTextSymbolDefault{\textfinalsigma}{LGR} % alias for \textvarsigma
\DeclareTextSymbolDefault{\textautosigma}{LGR} % char 115 in LGR
\DeclareTextSymbolDefault{\texttau}{LGR}
\DeclareTextSymbolDefault{\textupsilon}{LGR}
\DeclareTextSymbolDefault{\textphi}{LGR}
\DeclareTextSymbolDefault{\textchi}{LGR}
\DeclareTextSymbolDefault{\textpsi}{LGR}
\DeclareTextSymbolDefault{\textomega}{LGR}
% Additional Greek symbols
% ''''''''''''''''''''''''
%
% Including alias names for compatibility with hyperref's puenc.def.
%
% Ancient Greek Numbers (Athenian Numerals)::
\DeclareTextSymbolDefault{\textpentedeka}{LGR} % GREEK ACROPHONIC ATTIC FIFTY
\DeclareTextSymbolDefault{\textpentehekaton}{LGR} % GREEK ACROPHONIC ATTIC FIVE HUNDRED
\DeclareTextSymbolDefault{\textpenteqilioi}{LGR} % GREEK ACROPHONIC ATTIC FIVE THOUSAND
\DeclareTextSymbolDefault{\textpentemurioi}{LGR} % GREEK ACROPHONIC ATTIC FIFTY THOUSAND
% Archaic letters::
\DeclareTextSymbolDefault{\textstigma}{LGR} % ϛ
\DeclareTextSymbolDefault{\textstigmagreek}{LGR} % ϛ (puenc.def)
\DeclareTextSymbolDefault{\textvarstigma}{LGR} % stigma variant
\DeclareTextSymbolDefault{\textkoppa}{LGR} % ϟ (greek small letter koppa)
\DeclareTextSymbolDefault{\textkoppagreek}{LGR} % ϟ (puenc.def)
\DeclareTextSymbolDefault{\textqoppa}{LGR} % ϙ (archaic koppa)
\DeclareTextSymbolDefault{\textQoppa}{LGR} % Ϙ (archaic Koppa)
\DeclareTextSymbolDefault{\textStigma}{LGR} % Ϛ ϹΤ ligature in some fonts
\DeclareTextSymbolDefault{\textStigmagreek}{LGR} % Ϛ (puenc.def)
\DeclareTextSymbolDefault{\textSampi}{LGR} % Ϡ
\DeclareTextSymbolDefault{\textSampigreek}{LGR} % Ϡ (puenc.def)
\DeclareTextSymbolDefault{\textsampi}{LGR} % ϡ
\DeclareTextSymbolDefault{\textsampigreek}{LGR} % ϡ (puenc.def)
\DeclareTextSymbolDefault{\textanoteleia}{LGR} % ·
\DeclareTextSymbolDefault{\texterotimatiko}{LGR} % ; (003B is the preferred character)
\DeclareTextSymbolDefault{\textdigamma}{LGR} % ϝ
\DeclareTextSymbolDefault{\textDigamma}{LGR} % Ϝ
\DeclareTextSymbolDefault{\textdigammagreek}{LGR} % ϝ (puenc.def)
\DeclareTextSymbolDefault{\textDigammagreek}{LGR} % Ϝ (puenc.def)
% numeral signs: http://en.wikipedia.org/wiki/Greek_numerals ::
\DeclareTextSymbolDefault{\textnumeralsigngreek}{LGR} % (puenc.def)
\DeclareTextSymbolDefault{\textnumeralsignlowergreek}{LGR} % (puenc.def)
% Diacritics
% """"""""""
%
% Greek diacritics via "named" macros::
\DeclareTextAccentDefault{\accdasia}{LGR}
\DeclareTextAccentDefault{\accpsili}{LGR}
\DeclareTextAccentDefault{\acctonos}{LGR}
\DeclareTextAccentDefault{\accvaria}{LGR}
\DeclareTextAccentDefault{\accperispomeni}{LGR}
\DeclareTextAccentDefault{\accdialytika}{LGR}
\DeclareTextAccentDefault{\<}{LGR}
\DeclareTextAccentDefault{\>}{LGR}
%
\DeclareTextAccentDefault{\accdasiaoxia}{LGR}
\DeclareTextAccentDefault{\accdasiavaria}{LGR}
\DeclareTextAccentDefault{\accdasiaperispomeni}{LGR}
\DeclareTextAccentDefault{\accpsilioxia}{LGR}
\DeclareTextAccentDefault{\accpsilivaria}{LGR}
\DeclareTextAccentDefault{\accpsiliperispomeni}{LGR}
\DeclareTextAccentDefault{\accdialytikatonos}{LGR}
\DeclareTextAccentDefault{\accdialytikavaria}{LGR}
\DeclareTextAccentDefault{\accdialytikaperispomeni}{LGR}
% Postfix accents::
\DeclareTextSymbolDefault{\ypogegrammeni}{LGR} % "small" sub-iota
\DeclareTextSymbolDefault{\prosgegrammeni}{LGR} % "capital" sub-iota
% Other accents in LGR::
\DeclareTextAccentDefault{\accinvertedbrevebelow}{LGR} % INVERTED BREVE BELOW
\DeclareTextAccentDefault{\textsubarch}{LGR} % tipa, Teubner name: ut
\DeclareTextAccentDefault{\accbrevebelow}{LGR} % BREVE BELOW
% Auxiliary macros
% """"""""""""""""
%
% ``\MakeUppercase`` requires two internal commands::
\DeclareTextAccentDefault{\LGR@hiatus}{LGR}
\DeclareTextAccentDefault{\LGR@Dialytika}{LGR}
% .. References
% ----------
% .. _LaTeX Project Public License: http://www.latex-project.org/lppl.txt
% .. _CB fonts: http://www.ctan.org/pkg/cbgreek-complete
% .. _babel: http://www.ctan.org/pkg/babel
% .. _euenc: http://www.ctan.org/pkg/euenc
% .. _e-TeX: http://www.tex.ac.uk/cgi-bin/texfaq2html?label=etex
% .. _fontenc: http://www.ctan.org/pkg/fontenc
% .. _fontspec: http://www.ctan.org/pkg/fontspec
% .. _fntguide: http://www.ctan.org/tex-archive/macros/latex/doc/fntguide.pdf
% .. _greek-fontenc: http://www.ctan.org/pkg/greek-fontenc
% .. _greek-inputenc: http://www.ctan.org/pkg/greek-inputenc
% .. _hyperref: http://www.ctan.org/pkg/hyperref
% .. _inputenc: http://www.ctan.org/pkg/inputenc
% .. _polyglossia: http://www.ctan.org/pkg/polyglossia
% .. _textgreek: http://www.ctan.org/pkg/textgreek
% .. _xunicode: http://www.ctan.org/pkg/xunicode
|