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author | Karl Berry <karl@freefriends.org> | 2021-07-01 22:08:52 +0000 |
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committer | Karl Berry <karl@freefriends.org> | 2021-07-01 22:08:52 +0000 |
commit | 4467ce100367149c9236a44e6ada669472bf3193 (patch) | |
tree | eadfbea7a45e3aa6d18f9f659df5099cbf25170c /Master/texmf-dist/tex/generic | |
parent | cc8444da595c6edc1de088b1757c72dab61334c7 (diff) |
babel-latin (2jul21)
git-svn-id: svn://tug.org/texlive/trunk@59800 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Master/texmf-dist/tex/generic')
-rw-r--r-- | Master/texmf-dist/tex/generic/babel-latin/ecclesiasticlatin.lua | 260 |
1 files changed, 260 insertions, 0 deletions
diff --git a/Master/texmf-dist/tex/generic/babel-latin/ecclesiasticlatin.lua b/Master/texmf-dist/tex/generic/babel-latin/ecclesiasticlatin.lua new file mode 100644 index 00000000000..5777c6d07fb --- /dev/null +++ b/Master/texmf-dist/tex/generic/babel-latin/ecclesiasticlatin.lua @@ -0,0 +1,260 @@ +-- +-- This is file `ecclesiasticlatin.lua', +-- generated with the docstrip utility. +-- +-- The original source files were: +-- +-- latin.dtx (with options: `lua') +-- +-- The original version of the following Lua code has been written for the +-- polyglossia package by É. Roux and others. The code has been adapted for +-- the babel-latin package by K. Wehr. +-- +-- Copyright (C) 2021 by Keno Wehr +-- All rights reserved. +-- +-- This file is part of the babel-latin package. +-- ---------------------------------------------- +-- +-- It may be distributed and/or modified under the +-- conditions of the LaTeX Project Public License, either version 1.3 +-- of this license or (at your option) any later version. +-- The latest version of this license is in +-- http://www.latex-project.org/lppl.txt +-- and version 1.3 or later is part of all distributions of LaTeX +-- version 2003/12/01 or later. +-- +-- This work has the LPPL maintenance status "maintained". +-- +-- The Current Maintainer of this work is Keno Wehr. +-- +-- Please report errors to: https://github.com/wehro/babel-latin/issues +-- +luatexbase.provides_module({ + name = "ecclesiasticlatin", + date = "2021-06-27", + version = "4.0", + description = "babel-latin punctuation spacing for ecclesiastic Latin" +}) +local add_to_callback = luatexbase.add_to_callback +local in_callback = luatexbase.in_callback +local new_attribute = luatexbase.new_attribute +local node = node +local insert_node_before = node.insert_before +local insert_node_after = node.insert_after +local remove_node = node.remove +local has_attribute = node.has_attribute +local node_copy = node.copy +local new_node = node.new +local end_of_math = node.end_of_math +local get_next = node.getnext +local get_prev = node.getprev +local get_property = node.getproperty +local glue_code = node.id"glue" +local glyph_code = node.id"glyph" +local penalty_code = node.id"penalty" +local kern_code = node.id"kern" +local math_code = node.id"math" +local userkern = 1 +local removable_skip = { + [0] = true, -- userskip + [13] = true, -- spaceskip + [14] = true -- xspaceskip +} +local kern_node = new_node(kern_code) +kern_node.subtype = userkern +local function get_kern_node(dim) + local n = node_copy(kern_node) + n.kern = dim + return n +end +local space_chars = { + [0x20] = true, -- space + [0xA0] = true, -- no-break space + [0x1680] = true, -- ogham space mark + [0x2000] = true, -- en quad + [0x2001] = true, -- em quad + [0x2002] = true, -- en space + [0x2003] = true, -- em space + [0x2004] = true, -- three-per-em-space + [0x2005] = true, -- four-per-em space + [0x2006] = true, -- six-per-em space + [0x2007] = true, -- figure space + [0x2008] = true, -- punctuation space + [0x2009] = true, -- thin space + [0x200A] = true, -- hair space + [0x202F] = true, -- narrow no-break space + [0x205F] = true, -- medium mathematical space + [0x3000] = true -- ideographic space +} +local left_bracket_chars = { + [0x28] = true, -- left parenthesis + [0x5B] = true, -- left square bracket + [0x7B] = true, -- left curly bracket + [0x27E8] = true -- mathematical left angle bracket +} +local right_bracket_chars = { + [0x29] = true, -- right parenthesis + [0x5D] = true, -- right square bracket + [0x7D] = true, -- right curly bracket + [0x27E9] = true -- mathematical right angle bracket +} +local question_exclamation_chars = { + [0x21] = true, -- exclamation mark ! + [0x3F] = true, -- question mark ? + [0x203C] = true, -- double exclamation mark ‼ + [0x203D] = true, -- interrobang ‽ + [0x2047] = true, -- double question mark ⁇ + [0x2048] = true, -- question exclamation mark ⁈ + [0x2049] = true -- exclamation question mark ⁉ +} +local function somespace(n) + if n then + local id, subtype = n.id, n.subtype + if id == glue_code then + return removable_skip[subtype] + elseif id == kern_code then + return subtype == userkern + elseif id == glyph_code then + return space_chars[n.char] + end + end +end +local function someleftbracket(n) + if n then + local id = n.id + if id == glyph_code then + return left_bracket_chars[n.char] + end + end +end +local function somerightbracket(n) + if n then + local id = n.id + if id == glyph_code then + return right_bracket_chars[n.char] + end + end +end +local function question_exclamation_sequence(n1, n2) + if n1 and n2 then + local id1 = n1.id + local id2 = n2.id + if id1 == glyph_code and id2 == glyph_code then + return question_exclamation_chars[n1.char] and question_exclamation_chars[n2.char] + end + end +end +local function somepenalty(n, value) + if n then + local id = n.id + if id == penalty_code then + if value then + return n.penalty == value + else + return true + end + end + end +end +local punct_attr = new_attribute("ecclesiasticlatin_punct") +local left_space = {} +local right_space = {} +local function process(head) + local current = head + while current do + local id = current.id + if id == glyph_code then + if has_attribute(current, punct_attr) then + local char = get_property(current) and get_property(current).glyph_info + if not char and current.char <= 0x10FFFF then + char = utf8.char(current.char) + end + local leftspace, rightspace + if char then + leftspace = left_space[char] + rightspace = right_space[char] + end + if leftspace or rightspace then + local fontparameters = fonts.hashes.parameters[current.font] + local spacing_node + if leftspace and fontparameters then + local prev = get_prev(current) + local space_exception = false + if prev then + space_exception = someleftbracket(prev) + or question_exclamation_sequence(prev, current) + while somespace(prev) do + head = remove_node(head, prev) + prev = get_prev(current) + end + if somepenalty(prev, 10000) then + head = remove_node(head, prev) + end + end + spacing_node = get_kern_node(leftspace * fontparameters.quad) + if not space_exception then + head = insert_node_before(head, current, spacing_node) + end + end + if rightspace and fontparameters then + local next = get_next(current) + local space_exception = false + if next then + space_exception = somerightbracket(next) + local nextnext = get_next(next) + if somepenalty(next, 10000) and somespace(nextnext) then + head, next = remove_node(head, next) + end + while somespace(next) do + head, next = remove_node(head, next) + end + end + spacing_node = get_kern_node(rightspace * fontparameters.quad) + if not space_exception then + head, current = insert_node_after(head, current, spacing_node) + end + end + end + end + elseif id == math_code then + current = end_of_math(current) + end + current = get_next(current) + end + return head +end +local hairspace = 0.08333 -- 1/12 +local function space_left(char) + left_space[char] = hairspace +end +local function space_right(char, kern) + right_space[char] = hairspace +end +space_left('!') +space_left('?') +space_left('‼') +space_left('⁇') +space_left('⁈') +space_left('⁉') +space_left('‽') -- U+203D (interrobang) +space_left(':') +space_left(';') +space_left('»') +space_left('›') +space_right('«') +space_right('‹') +local function activate() + tex.setattribute(punct_attr, 1) + for _, callback_name in ipairs{ "pre_linebreak_filter", "hpack_filter" } do + if not in_callback(callback_name, "ecclesiasticlatin-punct.process") then + add_to_callback(callback_name, process, "ecclesiasticlatin-punct.process", 1) + end + end +end +local function deactivate() + tex.setattribute(punct_attr, -0x7FFFFFFF) -- this value means "unset" +end +ecclesiasticlatin = ecclesiasticlatin or {} +ecclesiasticlatin.activate_spacing = activate +ecclesiasticlatin.deactivate_spacing = deactivate |