% greek-fontenc.def
% *****************
%
% Common Greek font encoding definitions
% ======================================
%
% :Copyright: © 2013 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.
% :Identification:
%  ::

\ProvidesFile{greek-fontenc.def}
[2014/12/12 v0.12 Common Greek font encoding definitions]

% :Abstract:  This file provides definitions that are shared between
%             font encodings providing Greek characters.
%
% Changelog:
%   .. class:: borderless
%
%   ===== ============  ========================================================
%   0.9   2013-07-03    code "outsourced" from lgrxenc.def
%   0.9.1 2013-07-17    composite definitions starting with standard accent cmds
%   0.11  2013-11-28    ``\greekscript`` TextCommand
%   0.12  2014-12-12    Remove symbol macros for breathing accents.
%   ===== ============  ========================================================
%
% Usage
% -----
%
% This file is input by the font encoding definition files lgrenc.def_. and
% greek-euenc.def_.
%
% Implementation
% --------------
%
% ensuregreek, greekscript
% ~~~~~~~~~~~~~~~~~~~~~~~~
%
% Provide "empty" encoding-specific definitions for ``\ensuregreek`` and
% ``\greekscript``. The definitions in this file make the font encoding fit
% for use with the Greek script. (See ``textalpha.sty`` for default
% definitions.)
%
% The ``\ensuregreek`` macro can be used to ensure that its argument is set
% in a font encoding with support for Greek. If the active font encoding
% supports it, kerning between adjacent command calls (e.g.
% ``\ensuregreek{A}\ensuregreek{\Upsilon}``) is preserved. This allows, e.g.,
% wrapping of compound Unicode character definitions. ::

\ProvideTextCommand{\ensuregreek}{\LastDeclaredEncoding}[1]{#1}

% The ``\greekscript`` declaration switches to a font encoding supporting
% the Greek script, if required. The following definition announces the
% ``\LastDeclaredEncoding`` as Greek-supporting::

\ProvideTextCommand{\greekscript}{\LastDeclaredEncoding}{}


% Aliases
% ~~~~~~~
%
% Aliases are defined via `DeclareTextCommand` so that up/downcasing works
% without the need for additional uclclist_ entries.
%
% Compatibility aliases for hyperref_'s puenc.def::

\DeclareTextCommand{\textstigmagreek}{\LastDeclaredEncoding}{\textstigma}
\DeclareTextCommand{\textkoppagreek}{\LastDeclaredEncoding}{\textkoppa}
\DeclareTextCommand{\textStigmagreek}{\LastDeclaredEncoding}{\textStigma}
\DeclareTextCommand{\textSampigreek}{\LastDeclaredEncoding}{\textSampi}
\DeclareTextCommand{\textsampigreek}{\LastDeclaredEncoding}{\textsampi}
\DeclareTextCommand{\textdigammagreek}{\LastDeclaredEncoding}{\textdigamma}
\DeclareTextCommand{\textDigammagreek}{\LastDeclaredEncoding}{\textDigamma}

\DeclareTextCommand{\textnumeralsigngreek}{\LastDeclaredEncoding}{\textdexiakeraia}
\DeclareTextCommand{\textnumeralsignlowergreek}{\LastDeclaredEncoding}{\textaristerikeraia}

% Two Unicode names for one character::

\DeclareTextCommand{\accoxia}{\LastDeclaredEncoding}{\acctonos}
\DeclareTextCommand{\acckoronis}{\LastDeclaredEncoding}{\accpsili}

% Symbol macros for the breathings:
%
% Moved to ``textalpha.sty`` to avoid clashes with local definitions
% of ``\<`` and ``\>`` in documents using LGR or babel-greek.
% (Bugreport David Kastrup). If you want to use the short macros without
% loading `textalpha`, you can define them in the document preamble like
%
% .. code:: latex
%
%   \DeclareTextCommand{\<}{LGR}{\accdasia}
%   \DeclareTextCommand{\>}{LGR}{\accpsili}
%   \DeclareTextCompositeCommand{\>}{LGR}{'}{\accpsilioxia}
%   \DeclareTextCompositeCommand{\>}{LGR}{`}{\accpsilivaria}
%   \DeclareTextCompositeCommand{\>}{LGR}{~}{\accpsiliperispomeni}
%   \DeclareTextCompositeCommand{\<}{LGR}{'}{\accdasiaoxia}
%   \DeclareTextCompositeCommand{\<}{LGR}{`}{\accdasiavaria}
%   \DeclareTextCompositeCommand{\<}{LGR}{~}{\accdasiaperispomeni}
%
% TODO: do we also want alternative symbols for the breathings (cf. X compose
% table, LCI encoding)?
%
% .. code:: latex
%
%   \DeclareTextCommand{\(}{\LastDeclaredEncoding}{\accdasia}
%   \DeclareTextCommand{\)}{\LastDeclaredEncoding}{\accpsili}
%
% Names from babel_ and teubner_ (do we want to define them here as alias?)
%
% .. code:: latex
%
%   \DeclareTextCommand{\anwtonos}{\LastDeclaredEncoding}{\textdexiakeraia}     % ʹ
%   \DeclareTextCommand{\katwtonos}{\LastDeclaredEncoding}{\textaristerikeraia} % ͵
%
%
% Composite diacritics
% ~~~~~~~~~~~~~~~~~~~~
%
% Composite accents can be input as sequence of simple diacritics (in
% arbitrary order) via named macro, symbol macro and "transcription
% characters", e.g. one of
%
% .. code:: latex
%
%   \accdialytica\accvaria\textalpha,
%   \"\'\textalpha,
%   \"'\textalpha, or
%   \'"\textalpha.
%
% Separate definitions for the supported variants of the second input token
% are required as composition is based on the non-expanded input
%
% The composition with simple "transcription characters" must also be defined
% for the symbol macros, otherwise it fails with ``\Makeuppercase``.
%
% For Unicode encodings (where they do not resolve to Greek named macros,
% composite definitions starting with standard macros are requried::

\DeclareTextCompositeCommand{\accdialytika}{\LastDeclaredEncoding}{\acctonos}{\accdialytikatonos}
\DeclareTextCompositeCommand{\accdialytika}{\LastDeclaredEncoding}{\'}{\accdialytikatonos}
\DeclareTextCompositeCommand{\accdialytika}{\LastDeclaredEncoding}{'}{\accdialytikatonos}
\DeclareTextCompositeCommand{\"}{\LastDeclaredEncoding}{\'}{\accdialytikatonos}
\DeclareTextCompositeCommand{\"}{\LastDeclaredEncoding}{'}{\accdialytikatonos}
\DeclareTextCompositeCommand{\accdialytika}{\LastDeclaredEncoding}{\accvaria}{\accdialytikavaria}
\DeclareTextCompositeCommand{\accdialytika}{\LastDeclaredEncoding}{\`}{\accdialytikavaria}
\DeclareTextCompositeCommand{\accdialytika}{\LastDeclaredEncoding}{`}{\accdialytikavaria}
\DeclareTextCompositeCommand{\"}{\LastDeclaredEncoding}{\`}{\accdialytikavaria}
\DeclareTextCompositeCommand{\"}{\LastDeclaredEncoding}{`}{\accdialytikavaria}
\DeclareTextCompositeCommand{\accdialytika}{\LastDeclaredEncoding}{\accperispomeni}{\accdialytikaperispomeni}
\DeclareTextCompositeCommand{\accdialytika}{\LastDeclaredEncoding}{\~}{\accdialytikaperispomeni}
\DeclareTextCompositeCommand{\accdialytika}{\LastDeclaredEncoding}{~}{\accdialytikaperispomeni}
\DeclareTextCompositeCommand{\"}{\LastDeclaredEncoding}{\~}{\accdialytikaperispomeni}
\DeclareTextCompositeCommand{\"}{\LastDeclaredEncoding}{~}{\accdialytikaperispomeni}

\DeclareTextCompositeCommand{\acctonos}{\LastDeclaredEncoding}{\accdialytika}{\accdialytikatonos}
\DeclareTextCompositeCommand{\acctonos}{\LastDeclaredEncoding}{\"}{\accdialytikatonos}
\DeclareTextCompositeCommand{\acctonos}{\LastDeclaredEncoding}{"}{\accdialytikatonos}
\DeclareTextCompositeCommand{\'}{\LastDeclaredEncoding}{\"}{\accdialytikatonos}
\DeclareTextCompositeCommand{\'}{\LastDeclaredEncoding}{"}{\accdialytikatonos}
\DeclareTextCompositeCommand{\acctonos}{\LastDeclaredEncoding}{\accdasia}{\accdasiaoxia}
\DeclareTextCompositeCommand{\acctonos}{\LastDeclaredEncoding}{\<}{\accdasiaoxia}
\DeclareTextCompositeCommand{\acctonos}{\LastDeclaredEncoding}{<}{\accdasiaoxia}
\DeclareTextCompositeCommand{\'}{\LastDeclaredEncoding}{\<}{\accdasiaoxia}
\DeclareTextCompositeCommand{\'}{\LastDeclaredEncoding}{<}{\accdasiaoxia}
\DeclareTextCompositeCommand{\acctonos}{\LastDeclaredEncoding}{\accpsili}{\accpsilioxia}
\DeclareTextCompositeCommand{\acctonos}{\LastDeclaredEncoding}{\>}{\accpsilioxia}
\DeclareTextCompositeCommand{\acctonos}{\LastDeclaredEncoding}{>}{\accpsilioxia}
\DeclareTextCompositeCommand{\'}{\LastDeclaredEncoding}{\>}{\accpsilioxia}
\DeclareTextCompositeCommand{\'}{\LastDeclaredEncoding}{>}{\accpsilioxia}
\DeclareTextCompositeCommand{\'}{\LastDeclaredEncoding}{\'}{\textquoteright}
\DeclareTextCompositeCommand{\'}{\LastDeclaredEncoding}{'}{\textquoteright}

\DeclareTextCompositeCommand{\accvaria}{\LastDeclaredEncoding}{\accdialytika}{\accdialytikavaria}
\DeclareTextCompositeCommand{\accvaria}{\LastDeclaredEncoding}{\"}{\accdialytikavaria}
\DeclareTextCompositeCommand{\accvaria}{\LastDeclaredEncoding}{"}{\accdialytikavaria}
\DeclareTextCompositeCommand{\`}{\LastDeclaredEncoding}{\"}{\accdialytikavaria}
\DeclareTextCompositeCommand{\`}{\LastDeclaredEncoding}{"}{\accdialytikavaria}
\DeclareTextCompositeCommand{\accvaria}{\LastDeclaredEncoding}{\accdasia}{\accdasiavaria}
\DeclareTextCompositeCommand{\accvaria}{\LastDeclaredEncoding}{\<}{\accdasiavaria}
\DeclareTextCompositeCommand{\accvaria}{\LastDeclaredEncoding}{<}{\accdasiavaria}
\DeclareTextCompositeCommand{\`}{\LastDeclaredEncoding}{\<}{\accdasiavaria}
\DeclareTextCompositeCommand{\`}{\LastDeclaredEncoding}{<}{\accdasiavaria}
\DeclareTextCompositeCommand{\accvaria}{\LastDeclaredEncoding}{\accpsili}{\accpsilivaria}
\DeclareTextCompositeCommand{\accvaria}{\LastDeclaredEncoding}{\>}{\accpsilivaria}
\DeclareTextCompositeCommand{\accvaria}{\LastDeclaredEncoding}{>}{\accpsilivaria}
\DeclareTextCompositeCommand{\`}{\LastDeclaredEncoding}{\>}{\accpsilivaria}
\DeclareTextCompositeCommand{\`}{\LastDeclaredEncoding}{>}{\accpsilivaria}
\DeclareTextCompositeCommand{\`}{\LastDeclaredEncoding}{\`}{\textquoteleft}
\DeclareTextCompositeCommand{\`}{\LastDeclaredEncoding}{`}{\textquoteleft}

\DeclareTextCompositeCommand{\accperispomeni}{\LastDeclaredEncoding}{\accdialytika}{\accdialytikaperispomeni}
\DeclareTextCompositeCommand{\accperispomeni}{\LastDeclaredEncoding}{\"}{\accdialytikaperispomeni}
\DeclareTextCompositeCommand{\accperispomeni}{\LastDeclaredEncoding}{"}{\accdialytikaperispomeni}
\DeclareTextCompositeCommand{\~}{\LastDeclaredEncoding}{\"}{\accdialytikaperispomeni}
\DeclareTextCompositeCommand{\~}{\LastDeclaredEncoding}{"}{\accdialytikaperispomeni}
\DeclareTextCompositeCommand{\accperispomeni}{\LastDeclaredEncoding}{\accdasia}{\accdasiaperispomeni}
\DeclareTextCompositeCommand{\accperispomeni}{\LastDeclaredEncoding}{\<}{\accdasiaperispomeni}
\DeclareTextCompositeCommand{\accperispomeni}{\LastDeclaredEncoding}{<}{\accdasiaperispomeni}
\DeclareTextCompositeCommand{\~}{\LastDeclaredEncoding}{\<}{\accdasiaperispomeni}
\DeclareTextCompositeCommand{\~}{\LastDeclaredEncoding}{<}{\accdasiaperispomeni}
\DeclareTextCompositeCommand{\accperispomeni}{\LastDeclaredEncoding}{\accpsili}{\accpsiliperispomeni}
\DeclareTextCompositeCommand{\accperispomeni}{\LastDeclaredEncoding}{\>}{\accpsiliperispomeni}
\DeclareTextCompositeCommand{\accperispomeni}{\LastDeclaredEncoding}{>}{\accpsiliperispomeni}
\DeclareTextCompositeCommand{\~}{\LastDeclaredEncoding}{\>}{\accpsiliperispomeni}
\DeclareTextCompositeCommand{\~}{\LastDeclaredEncoding}{>}{\accpsiliperispomeni}

\DeclareTextCompositeCommand{\accpsili}{\LastDeclaredEncoding}{\acctonos}{\accpsilioxia}
\DeclareTextCompositeCommand{\accpsili}{\LastDeclaredEncoding}{\'}{\accpsilioxia}
\DeclareTextCompositeCommand{\accpsili}{\LastDeclaredEncoding}{'}{\accpsilioxia}
\DeclareTextCompositeCommand{\accpsili}{\LastDeclaredEncoding}{\accvaria}{\accpsilivaria}
\DeclareTextCompositeCommand{\accpsili}{\LastDeclaredEncoding}{\`}{\accpsilivaria}
\DeclareTextCompositeCommand{\accpsili}{\LastDeclaredEncoding}{`}{\accpsilivaria}
\DeclareTextCompositeCommand{\accpsili}{\LastDeclaredEncoding}{\accperispomeni}{\accpsiliperispomeni}
\DeclareTextCompositeCommand{\accpsili}{\LastDeclaredEncoding}{\~}{\accpsiliperispomeni}
\DeclareTextCompositeCommand{\accpsili}{\LastDeclaredEncoding}{~}{\accpsiliperispomeni}

\DeclareTextCompositeCommand{\accdasia}{\LastDeclaredEncoding}{\acctonos}{\accdasiaoxia}
\DeclareTextCompositeCommand{\accdasia}{\LastDeclaredEncoding}{\'}{\accdasiaoxia}
\DeclareTextCompositeCommand{\accdasia}{\LastDeclaredEncoding}{'}{\accdasiaoxia}
\DeclareTextCompositeCommand{\accdasia}{\LastDeclaredEncoding}{\accvaria}{\accdasiavaria}
\DeclareTextCompositeCommand{\accdasia}{\LastDeclaredEncoding}{\`}{\accdasiavaria}
\DeclareTextCompositeCommand{\accdasia}{\LastDeclaredEncoding}{`}{\accdasiavaria}
\DeclareTextCompositeCommand{\accdasia}{\LastDeclaredEncoding}{\accperispomeni}{\accdasiaperispomeni}
\DeclareTextCompositeCommand{\accdasia}{\LastDeclaredEncoding}{\~}{\accdasiaperispomeni}

% .. _uclclist:
%
% UPPERCASE
% ~~~~~~~~~
%
% If UPPERCASE (all-caps) is generated with ``\MakeUppercase``, macro
% substitutions in the ``\@uclclist`` apply. This can be used to drop the
% diacritics (except dialytika and sub-iota). Different conventions exist for
% the `treatment of sub-iota with uppercase letters`__. In the CB Fonts, an
% "index" iota is used.
%
% __ http://www.tlg.uci.edu/~opoudjis/unicode/unicode_adscript.html
%
%
% @uclclist extension
% """""""""""""""""""
%
% Based on the `babel patch`_ and ``fontenc.sty``.
%
% The definition of an auxiliary, self-restting macro makes this idempotent
% (only the first use of this function will expand the ``@uclclist``).
% The second and third lines are TeX' way of writing ``uclclist += …``::

\providecommand*\update@uclc@with@greek{%
  \expandafter\def\expandafter\@uclclist\expandafter{%
    \@uclclist
    \accdasia\LGR@accdropped
    \accdasiaoxia\LGR@hiatus
    \accdasiavaria\LGR@accdropped
    \accdasiaperispomeni\LGR@accdropped
    \accpsili\LGR@hiatus
    \accpsilioxia\LGR@hiatus
    \accpsilivaria\LGR@hiatus
    \accpsiliperispomeni\LGR@accdropped
    \acctonos\LGR@hiatus
    \accvaria\LGR@accdropped
    \accdialytikatonos\LGR@accDialytika
    \accdialytikavaria\LGR@accDialytika
    \accdialytikaperispomeni\LGR@accDialytika
    \accperispomeni\LGR@accdropped
    \ypogegrammeni\prosgegrammeni
    \textalpha  \textAlpha
    \textbeta   \textBeta
    \textgamma  \textGamma
    \textdelta  \textDelta
    \textepsilon\textEpsilon
    \textzeta   \textZeta
    \texteta    \textEta
    \texttheta  \textTheta
    \textiota   \textIota
    \textkappa  \textKappa
    \textlambda \textLambda
    \textmu     \textMu
    \textnu     \textNu
    \textxi     \textXi
    \textomicron\textOmicron
    \textpi     \textPi
    \textrho    \textRho
    \textvarsigma  \textSigma
    \textsigma     \textSigma
    \textautosigma \textSigma
    \texttau    \textTau
    \textupsilon\textUpsilon
    \textphi    \textPhi
    \textchi    \textChi
    \textpsi    \textPsi
    \textomega  \textOmega
    \textqoppa     \textQoppa
    \textvarstigma \textStigma
    \textstigma    \textStigma
    \textsampi     \textSampi
    \textdigamma   \textDigamma
  }%
  \let\update@uclc@with@greek\relax
}

% Expand the uclc list using the just defined macro::

\update@uclc@with@greek


% Substitution macros
% """""""""""""""""""
%
% Drop diacritics (The argument passing ensures that kerning is preserved) ::

\DeclareTextCommand{\LGR@accdropped}{\LastDeclaredEncoding}[1]{#1}


% Keep dialytika: Define a dummy alias so that downcasing with
% ``\MakeLowercase`` does not convert a simple dialytika to a composite
% accent::

\DeclareTextCommand{\LGR@accDialytika}{\LastDeclaredEncoding}{\accdialytika}
\DeclareTextCompositeCommand{\accdialytika}{\LastDeclaredEncoding}{\LGR@hiatus}{\accdialytika}



% Mark hiatus
% """""""""""
%
% Tonos and dasia mark a hiatus if placed on the
% first vowel of a diphthong (ΑΙ, ΑΥ, ΕΙ). A dialytika must be placed on the
% second vowel if they are dropped (άυλος → ΑΫΛΟΣ, μάινα → ΜΑΪΝΑ, κέικ → ΚΕΪΚ,
% ἀυπνία → ΑΫΠΝΙΑ)::

\DeclareTextCommand{\LGR@hiatus}{\LastDeclaredEncoding}[1]{#1}
\DeclareTextCompositeCommand{\LGR@hiatus}{\LastDeclaredEncoding}{>}{\LGR@hiatus}
\DeclareTextCompositeCommand{\LGR@hiatus}{\LastDeclaredEncoding}{<}{\LGR@accdropped}
\DeclareTextCompositeCommand{\LGR@hiatus}{\LastDeclaredEncoding}{\textAlpha}{\LGR@A@hiatus}
\DeclareTextCompositeCommand{\LGR@hiatus}{\LastDeclaredEncoding}{\textEpsilon}{\LGR@E@hiatus}

% The font encoding file must define the ``\LGR@hiatus`` TextCommand. See
% ``lgrenc.def`` for an example.
%
% The following macro can be used to test if the next character is an Alpha or
% Epsilon. As ``\@ifnextchar`` gobbles spaces the lookahead macro definition
% from ``amsgen.sty`` is used:
%
%   This macro is a new version of LaTeX’s ``\@ifnextchar``, macro
%   that does not skip over spaces.
%
% ::

\providecommand*{\LGR@ifnextchar}[3]{%
  \let\reserved@d= #1%
  \def\reserved@a{#2}\def\reserved@b{#3}%
  \futurelet\@let@token\LGR@ifnch
}
\providecommand*{\LGR@ifnch}{%
  \ifx\@let@token\reserved@d \let\reserved@b\reserved@a \fi
  \reserved@b
}



% .. References
%    ----------
%
% .. _alphabeta: alphabeta.sty.html
% .. _athnum: http://www.ctan.org/pkg/athnum
% .. _Babel: http://www.ctan.org/pkg/babel
% .. _babel patch: http://www.eutypon.gr/eutypon/pdf/e2008-20/e20-a03.pdf
% .. _fntguide: http://mirror.ctan.org/macros/latex/doc/fntguide.pdf
% .. _fontenc:  http://www.ctan.org/pkg/fontenc
% .. _hyperref: http://www.ctan.org/pkg/hyperref
% .. _ibycus: http://www.ctan.org/pkg/ibycus-babel
% .. _LaTeX Project Public License: http://www.latex-project.org/lppl.txt
% .. _lgrx: http://www.ctan.org/pkg/lgrx
% .. _ltxcmds: http://www.ctan.org/pkg/ltxcmds
% .. _teubner: http://www.ctan.org/pkg/teubner
% .. _teubner-doc:
%     http://mirror.ctan.org/macros/latex/contrib/teubner/teubner-doc.pdf
% .. _textalpha: textalpha.sty.html
% .. _ucs: http://www.ctan.org/pkg/unicode
%
% .. _lgrenc.def: lgrenc.def.html
% .. _greek-euenc.def: greek-euenc.def.html
