textalpha.sty

normalize-symbols

The “variant shape” symbol characters like 03D1 GREEK THETA SYMBOL are mathematical charcters for mathematical use (similar to 1D440 MATHEMATICAL ITALIC CAPITAL M). Unfortunately, some Greek texts sources in Unicode encoding mix letter and symbol characters .

The “normalize-symbols” option controls the handling of variant shape symbols under 8-bit TeX:

• The option activates a simple “folding” mechanism that merges ϰ and κ to textkappa etc. for text copied from external sources which may use the GREEK SYMBOL characters in place of GREEK LETTERS,

• Without this option, variant shape symbols in the input are reported as errors to prevent information loss in cases where the distinction between ϰ and κ is intended (e.g. in mathematical or scientific context).

With XeTeX/LuaTeX and Unicode fonts, this option is ignored.

\newif\iftextalpha@normalizeSymbols
\DeclareOption{normalize-symbols}{\textalpha@normalizeSymbolstrue}

keep-semicolon

The erotimatiko looks like a semicolon but is a Greek question mark:

• The LGR font encoding uses the Latin question mark as input for the erotimatiko and maps the semicolon to a middle dot (ano teleia).

• The Unicode standard provides the code point 037E GREEK QUESTION MARK but says: “character 003B SEMICOLON (and not 037E) is the preferred character for Greek question mark”.

The keep-semicolon option allows to use the semicolon as erotimatiko in both, Xe/LuaTeX and 8-bit TeX. (The ano teleia can be input as \textanoteleia or using character 00B7 MIDDLE DOT.) With XeTeX/LuaTeX and Unicode fonts, this option is ignored.

\newif\iftextalpha@keepSemicolon
\DeclareOption{keep-semicolon}{\textalpha@keepSemicolontrue}

\ProcessOptions\relax

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 tuenc-greek.def (Greek LICR macros for TU, EU1, or 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
      \def\encodingdefault{LGR}}

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}}

Eventually, all font encodings supporting Greek script (e.g. LGI, PU, TU) 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{\textmugreek}{LGR}    % (puenc.def)
\DeclareTextSymbolDefault{\textnu}{LGR}
\DeclareTextSymbolDefault{\textxi}{LGR}
\DeclareTextSymbolDefault{\textomicron}{LGR}
\DeclareTextSymbolDefault{\textpi}{LGR}
\DeclareTextSymbolDefault{\textrho}{LGR}
\DeclareTextSymbolDefault{\textsigma}{LGR}
\DeclareTextSymbolDefault{\textfinalsigma}{LGR}
\DeclareTextSymbolDefault{\textvarsigma}{LGR}   % alias for \textfinalsigma
\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 (no separate Unicode character)
\DeclareTextSymbolDefault{\textkoppa}{LGR}       % ϟ Greek small letter koppa
\DeclareTextSymbolDefault{\textkoppagreek}{LGR}  % ϟ (puenc.def)
\DeclareTextSymbolDefault{\textKoppa}{LGR}       % ϟ Greek letter koppa (numeral 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{\textdexiakeraia}{LGR}      % ʹ (Dexia keraia)
\DeclareTextSymbolDefault{\textnumeralsigngreek}{LGR} % (puenc.def)
\DeclareTextSymbolDefault{\textaristerikeraia}{LGR}   % ͵ (Aristeri keraia)
\DeclareTextSymbolDefault{\textnumeralsignlowergreek}{LGR} % (puenc.def)

\DeclareTextSymbolDefault{\textbetasymbol}{LGR}    % ϐ GREEK BETA SYMBOL
\DeclareTextSymbolDefault{\textthetasymbol}{LGR}   % ϑ $\vartheta$ GREEK THETA SYMBOL
\DeclareTextSymbolDefault{\textphisymbol}{LGR}     % ϕ $\phi$ GREEK PHI SYMBOL
\DeclareTextSymbolDefault{\textpisymbol}{LGR}      % ϖ $\varpi$ GREEK PI SYMBOL
\DeclareTextSymbolDefault{\textkappasymbol}{LGR}   % ϰ GREEK KAPPA SYMBOL
\DeclareTextSymbolDefault{\textrhosymbol}{LGR}     % ϱ $\varrho$ GREEK RHO SYMBOL
\DeclareTextSymbolDefault{\textThetasymbol}{LGR}   % ϴ GREEK CAPITAL THETA SYMBOL
\DeclareTextSymbolDefault{\textepsilonsymbol}{LGR} % ϵ $\epsilon$ GREEK LUNATE EPSILON SYMBOL

\iftextalpha@normalizeSymbols
  \DeclareTextCommand{\textbetasymbol}   {LGR}{\textbeta}
  \DeclareTextCommand{\textthetasymbol}  {LGR}{\texttheta}
  \DeclareTextCommand{\textphisymbol}    {LGR}{\textphi}
  \DeclareTextCommand{\textpisymbol}     {LGR}{\textpi}
  \DeclareTextCommand{\textkappasymbol}  {LGR}{\textkappa}
  \DeclareTextCommand{\textrhosymbol}    {LGR}{\textrho}
  \DeclareTextCommand{\textThetasymbol}  {LGR}{\textTheta}
  \DeclareTextCommand{\textepsilonsymbol}{LGR}{\textepsilon}
\fi

Diacritics

Greek diacritics via “named” macros:

\DeclareTextAccentDefault{\accdasia}{LGR}
\DeclareTextAccentDefault{\accpsili}{LGR}
\DeclareTextAccentDefault{\acctonos}{LGR}
\DeclareTextAccentDefault{\accoxia}{LGR}
\DeclareTextAccentDefault{\accvaria}{LGR}
\DeclareTextAccentDefault{\accperispomeni}{LGR}
\DeclareTextAccentDefault{\accdialytika}{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}

Symbol macros for the breathings:

\DeclareTextAccentDefault{\<}{LGR}
\DeclareTextAccentDefault{\>}{LGR}

Postfix accents:

\DeclareTextSymbolDefault{\ypogegrammeni}{LGR} % subscript mute iota (combining)
\DeclareTextSymbolDefault{\prosgegrammeni}{LGR}  % adscript mute iota (spacing)

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 four internal commands:

\DeclareTextAccentDefault{\LGR@accdropped}{LGR}
\DeclareTextAccentDefault{\LGR@accDialytika}{LGR}
\DeclareTextAccentDefault{\LGR@hiatus}{LGR}
\DeclareTextSymbolDefault{\LGR@ypogegrammeni}{LGR}

semicolon as erotimatiko

The text command \textsemicolon inserts \texterotimatiko in LGR font encoding and a “normal” semicolon else. In math mode, it inserts the “normal” semicolon also if the text font encoding is LGR:

\ProvideTextCommandDefault{\textsemicolon}{;}
\ProvideTextCommand{\textsemicolon}{LGR}{\texterotimatiko}

The LGR font encoding maps “;” to a middle dot (ano teleia). With the keep-semicolon option, the semicolon is made an active character and calls \textsemicolon:

\iftextalpha@keepSemicolon
  \catcode`;=\active
  \newcommand{;}{\TextOrMath{\textsemicolon}{\char59}}
\fi