# 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.

Identification

      \NeedsTeXFormat{LaTeX2e}
      \ProvidesPackage{textalpha}
      [2013/05/03 v0.3 macros for Greek letters in text]

  This package is part of the lgrx bundle.

Abstract

Provide a set of `\text*` macros for Greek letters outside math.

Note

The package was renamed from textgreek to textalpha to prevent confusion with the textgreek package by Leonard Michlmayr.

Changelog:

  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

# Motivation

By default, TeX macros for Greek letters

- are only valid in mathematical mode,

- do not change shape (default shape is italic).

In Greek text fonts with the LGR font encoding, letters are accessible by a Latin transcription or, with lgrx, `\textalpha` – `\textOmega` LICR macros.

This package declares the LGR font encoding as default for Greek LICR macros. After loading it, symbols from a Greek text font (e.g. the CB fonts) can be accessed without the need for an explicite font-encoding switch.

- In combination with the `\text` macro from amsmath, this can be used to get matching upright and bold upright Greek symbols in math mode.

- In combination with `\usepackage[utf8]{inputenc}` and the accompanying `lgrenc.dfu` file, Unicode input of Greek characters is supported.

Attention

  While the font-encoding independent macros work reasonably well for single symbols, the automatic font-encoding switches behind the doors interferes with the kerning between letters and replacement of accent+character with a pre-composed character.

  Therefore, Greek text should be written with the help of babel, setting the language to either `greek` or `polutonikogreek` or wrapped in the provided `\ensuregreek` macro.

The package uses NFSS default definitions as explained in the fntguide (section 5.3).

# Implementation

## Requirements

This package requires the extended font encoding definitions

    \input{lgrxenc.def}

## ensuregreek

The `\ensuregreek` command can be used to ensure that its argument is set in a font encoding with support for Greek. We define LGR as default encoding for Greek text:

    \DeclareTextCommandDefault{\ensuregreek}[1]{{\fontencoding{LGR}\selectfont #1}}

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`.

Backwards compatibility definition: versions < 0.3 used the macro name `\TextGreek`:

    \DeclareTextCommandDefault{\TextGreek}[1]{{\fontencoding{LGR}\selectfont #1}}

## 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 and babel’s greek.ldf.

Ancient Greek Numbers (Athenian Numerals):

    \DeclareTextSymbolDefault{\PiDelta}{LGR} % GREEK ACROPHONIC ATTIC FIFTY
    \DeclareTextSymbolDefault{\PiEta}{LGR}   % GREEK ACROPHONIC ATTIC FIVE HUNDRED
    \DeclareTextSymbolDefault{\PiChi}{LGR}   % GREEK ACROPHONIC ATTIC FIVE THOUSAND
    \DeclareTextSymbolDefault{\PiMu}{LGR}    % GREEK ACROPHONIC ATTIC FIFTY THOUSAND
    % \DeclareTextSymbolDefault{\pentedeka}{LGR}    % GREEK ACROPHONIC ATTIC FIFTY
    % \DeclareTextSymbolDefault{\pentehekaton}{LGR} % GREEK ACROPHONIC ATTIC FIVE HUNDRED
    % \DeclareTextSymbolDefault{\penteqilioi}{LGR}  % GREEK ACROPHONIC ATTIC FIVE THOUSAND
    % \DeclareTextSymbolDefault{\pentemurioi}{LGR}  % GREEK ACROPHONIC ATTIC FIFTY THOUSAND

    \DeclareTextSymbolDefault{\stigma}{LGR}        % ϛ
    \DeclareTextSymbolDefault{\textstigmagreek}{LGR} % ϛ (puenc.def)
    \DeclareTextSymbolDefault{\varstigma}{LGR}     % stigma variant (CB.enc, teubner)
    % \DeclareTextSymbolDefault{\vardigamma}{LGR}  % digamma variant (greek.ldf)
    \DeclareTextSymbolDefault{\koppa}{LGR}         % ϟ (greek small letter koppa)
    \DeclareTextSymbolDefault{\textkoppagreek}{LGR}  % ϟ (puenc.def)
    \DeclareTextSymbolDefault{\qoppa}{LGR}           % ϙ (archaic koppa)
    \DeclareTextSymbolDefault{\Qoppa}{LGR}           % Ϙ (archaic Koppa)
    \DeclareTextSymbolDefault{\Stigma}{LGR}          % ϹΤ ligature (teubner)
    \DeclareTextSymbolDefault{\textStigmagreek}{LGR} % ϹΤ ligature (puenc.def)
    \DeclareTextSymbolDefault{\Sampi}{LGR}           % Ϡ
    \DeclareTextSymbolDefault{\textSampigreek}{LGR}  % Ϡ (puenc.def)
    \DeclareTextSymbolDefault{\sampi}{LGR}           % ϡ
    \DeclareTextSymbolDefault{\textsampigreek}{LGR}  % ϡ (puenc.def)
    \DeclareTextSymbolDefault{\anoteleia}{LGR}     % ·
    \DeclareTextSymbolDefault{\erotimatiko}{LGR}   % ;
    % \digamma used by amsmath!
    \DeclareTextSymbolDefault{\textdigamma}{LGR}   % ϝ (LGRx)
    \DeclareTextSymbolDefault{\textDigamma}{LGR}   % Ϝ
    \DeclareTextSymbolDefault{\ddigamma}{LGR}      % ϝ (greek.ldf)
    \DeclareTextSymbolDefault{\Digamma}{LGR}       % Ϝ
    \DeclareTextSymbolDefault{\textdigammagreek}{LGR} % ϝ (puenc.def)
    \DeclareTextSymbolDefault{\textDigammagreek}{LGR} % Ϝ (puenc.def)

    % numeral signs: http://en.wikipedia.org/wiki/Greek_numerals
    \DeclareTextSymbolDefault{\anwtonos}{LGR}     % ʹ (Dexia keraia)
    \DeclareTextSymbolDefault{\katwtonos}{LGR}    % ͵ (Aristeri keraia)
    \DeclareTextSymbolDefault{\textnumeralsigngreek}{LGR}      % (puenc.def)
    \DeclareTextSymbolDefault{\textnumeralsignlowergreek}{LGR} % (puenc.def)

## Diacritics

Diacritics are defined via “named” macros in `lgrxenc.def`. Make them default in any encoding:

    \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

## Auxiliary macros

`\MakeUppercase` requires two internal commands:

    \DeclareTextAccentDefault{\@hiatus}{LGR}
    \DeclareTextAccentDefault{\@Dialytika}{LGR}

Backwards compatibility with LGRx versions < 0.7:

    \DeclareTextSymbolDefault{\Ypogegrammeni}{LGR}
    \DeclareTextSymbolDefault{\Prosgegrammeni}{LGR}
    \DeclareTextAccentDefault{\Dasia}{LGR}
    \DeclareTextAccentDefault{\Psili}{LGR}
    \DeclareTextAccentDefault{\Tonos}{LGR}
    \DeclareTextAccentDefault{\Varia}{LGR}
    \DeclareTextAccentDefault{\Perispomeni}{LGR}
    \DeclareTextAccentDefault{\Dialytika}{LGR}

    \DeclareTextAccentDefault{\DialytikaPerispomeni}{LGR}
    \DeclareTextAccentDefault{\DialytikaTonos}{LGR}
    \DeclareTextAccentDefault{\DialytikaVaria}{LGR}
    \DeclareTextAccentDefault{\DasiaPerispomeni}{LGR}
    \DeclareTextAccentDefault{\DasiaVaria}{LGR}
    \DeclareTextAccentDefault{\DasiaOxia}{LGR}
    \DeclareTextAccentDefault{\PsiliPerispomeni}{LGR}
    \DeclareTextAccentDefault{\PsiliOxia}{LGR}
    \DeclareTextAccentDefault{\PsiliVaria}{LGR}