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LaTeX: add xindy merge rules for TeX-escaped Greek letters

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The effect is that indexed Greek letters are sorted with uppercase Greek
letters before lowercase Greek: ΓΔΘ...αβγ...; without this commit the
Greek letters are ordered according to the ascii characters used in the
TeX control sequences as set-up in sphinx.util.texescape, i.e. the order
is αβχΔδεηΓγ... In both cases indexed terms starting with such a Greek
letter end up in the same group as terms starting with a non-letter.

This commit does not create letter-groups for Greek letters, as such
letter-groups would require to make sure non-escaped letters such as α
are accepted by TeX engine, and this requires extra-steps for pdflatex (or
OpenType font with Greek script for xelatex/lualatex), and if those
steps were made default by Sphinx, there would not be a reason anymore
to escape via sphinx.util.texescape the Greek letters from rest source.
This commit is contained in:
jfbu 2018-07-20 20:31:04 +02:00
parent 5aca2031c5
commit b3d89f9417
1 changed files with 34 additions and 0 deletions
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34
sphinx/texinputs/sphinx.xdy
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@ -146,6 +146,40 @@
(merge-rule "\(\sb{\text{7}}\)" "₇" :string)
(merge-rule "\(\sb{\text{8}}\)" "₈" :string)
(merge-rule "\(\sb{\text{9}}\)" "₉" :string)
(merge-rule "\(\alpha\)" "α" :string)
(merge-rule "\(\beta\)" "β" :string)
(merge-rule "\(\gamma\)" "γ" :string)
(merge-rule "\(\delta\)" "δ" :string)
(merge-rule "\(\epsilon\)" "ε" :string)
(merge-rule "\(\zeta\)" "ζ" :string)
(merge-rule "\(\eta\)" "η" :string)
(merge-rule "\(\theta\)" "θ" :string)
(merge-rule "\(\iota\)" "ι" :string)
(merge-rule "\(\kappa\)" "κ" :string)
(merge-rule "\(\lambda\)" "λ" :string)
(merge-rule "\(\mu\)" "μ" :string)
(merge-rule "\(\nu\)" "ν" :string)
(merge-rule "\(\xi\)" "ξ" :string)
(merge-rule "\(\pi\)" "π" :string)
(merge-rule "\(\rho\)" "ρ" :string)
(merge-rule "\(\sigma\)" "σ" :string)
(merge-rule "\(\tau\)" "τ" :string)
(merge-rule "\(\upsilon\)" "υ" :string)
(merge-rule "\(\phi\)" "φ" :string)
(merge-rule "\(\chi\)" "χ" :string)
(merge-rule "\(\psi\)" "ψ" :string)
(merge-rule "\(\omega\)" "ω" :string)
(merge-rule "\(\Gamma\)" "Γ" :string)
(merge-rule "\(\Delta\)" "Δ" :string)
(merge-rule "\(\Theta\)" "Θ" :string)
(merge-rule "\(\Lambda\)" "Λ" :string)
(merge-rule "\(\Xi\)" "Ξ" :string)
(merge-rule "\(\Pi\)" "Π" :string)
(merge-rule "\(\Sigma\)" "Σ" :string)
(merge-rule "\(\Upsilon\)" "Υ" :string)
(merge-rule "\(\Phi\)" "Φ" :string)
(merge-rule "\(\Psi\)" "Ψ" :string)
(merge-rule "\(\Omega\)" "Ω" :string)
;; This xindy module provides some basic support for "see"
(require "makeindex.xdy")