# 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}
      [2013/05/28 v0.4 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
  2013-05-28 | 0.4 | use `lgrenc.def` from greek-fontenc

# Motivation

By default, TeX macros for Greek letters are only valid in mathematical mode. This package declares the LGR font encoding as default for Greek LICR macros (`\textalpha` – `\textOmega`).

- 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 `\usepackage[utf8]{inputenc}` and `lgrenc.dfu` from greek-inputenc, Unicode input of Greek characters is supported in any font encoding.

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

Attention

  The macros work well in any font encoding for single symbols.

  However, 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, setting the language to `greek` 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 font encoding definitions from greek-fontenc:

    \input{lgrenc.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`.

## 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

## Auxiliary macros

`\MakeUppercase` requires two internal commands:

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