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|
if not modules then modules = { } end modules ['scrp-ini'] = {
version = 1.001,
comment = "companion to scrp-ini.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- We need to rewrite this a bit ... rather old code ... will be done when japanese
-- is finished.
local attributes, nodes, node = attributes, nodes, node
local trace_analyzing = false trackers.register("scripts.analyzing", function(v) trace_analyzing = v end)
local trace_injections = false trackers.register("scripts.injections", function(v) trace_injections = v end)
local report_preprocessing = logs.reporter("scripts","preprocessing")
local utfchar = utf.char
local first_glyph = node.first_glyph or node.first_character
local traverse_id = node.traverse_id
local texsetattribute = tex.setattribute
local nodecodes = nodes.nodecodes
local unsetvalue = attributes.unsetvalue
local glyph_code = nodecodes.glyph
local glue_code = nodecodes.glue
local a_scriptinjection = attributes.private('scriptinjection')
local a_scriptsplitting = attributes.private('scriptsplitting')
local a_scriptstatus = attributes.private('scriptstatus')
local fontdata = fonts.hashes.identifiers
local allocate = utilities.storage.allocate
local setnodecolor = nodes.tracers.colors.set
local setmetatableindex = table.setmetatableindex
local enableaction = nodes.tasks.enableaction
local disableaction = nodes.tasks.disableaction
scripts = scripts or { }
local scripts = scripts
scripts.hash = scripts.hash or { }
local hash = scripts.hash
local handlers = allocate()
scripts.handlers = handlers
local injectors = allocate()
scripts.injectors = handlers
local splitters = allocate()
scripts.splitters = splitters
local hash = { -- we could put these presets in char-def.lua
--
-- half width opening parenthesis
--
[0x0028] = "half_width_open",
[0x005B] = "half_width_open",
[0x007B] = "half_width_open",
[0x2018] = "half_width_open", -- ‘
[0x201C] = "half_width_open", -- “
--
-- full width opening parenthesis
--
[0x3008] = "full_width_open", -- 〈 Left book quote
[0x300A] = "full_width_open", -- 《 Left double book quote
[0x300C] = "full_width_open", -- 「 left quote
[0x300E] = "full_width_open", -- 『 left double quote
[0x3010] = "full_width_open", -- 【 left double book quote
[0x3014] = "full_width_open", -- 〔 left book quote
[0x3016] = "full_width_open", --〖 left double book quote
[0x3018] = "full_width_open", -- left tortoise bracket
[0x301A] = "full_width_open", -- left square bracket
[0x301D] = "full_width_open", -- reverse double prime qm
[0xFF08] = "full_width_open", -- ( left parenthesis
[0xFF3B] = "full_width_open", -- [ left square brackets
[0xFF5B] = "full_width_open", -- { left curve bracket
--
-- half width closing parenthesis
--
[0x0029] = "half_width_close",
[0x005D] = "half_width_close",
[0x007D] = "half_width_close",
[0x2019] = "half_width_close", -- ’ right quote, right
[0x201D] = "half_width_close", -- ” right double quote
--
-- full width closing parenthesis
--
[0x3009] = "full_width_close", -- 〉 book quote
[0x300B] = "full_width_close", -- 》 double book quote
[0x300D] = "full_width_close", -- 」 right quote, right
[0x300F] = "full_width_close", -- 』 right double quote
[0x3011] = "full_width_close", -- 】 right double book quote
[0x3015] = "full_width_close", -- 〕 right book quote
[0x3017] = "full_width_close", -- 〗 right double book quote
[0x3019] = "full_width_close", -- right tortoise bracket
[0x301B] = "full_width_close", -- right square bracket
[0x301E] = "full_width_close", -- double prime qm
[0x301F] = "full_width_close", -- low double prime qm
[0xFF09] = "full_width_close", -- ) right parenthesis
[0xFF3D] = "full_width_close", -- ] right square brackets
[0xFF5D] = "full_width_close", -- } right curve brackets
--
[0xFF62] = "half_width_open", -- left corner bracket
[0xFF63] = "half_width_close", -- right corner bracket
--
-- vertical opening vertical
--
-- 0xFE35, 0xFE37, 0xFE39, 0xFE3B, 0xFE3D, 0xFE3F, 0xFE41, 0xFE43, 0xFE47,
--
-- vertical closing
--
-- 0xFE36, 0xFE38, 0xFE3A, 0xFE3C, 0xFE3E, 0xFE40, 0xFE42, 0xFE44, 0xFE48,
--
-- half width opening punctuation
--
-- <empty>
--
-- full width opening punctuation
--
-- 0x2236, -- ∶
-- 0xFF0C, -- ,
--
-- half width closing punctuation_hw
--
[0x0021] = "half_width_close", -- !
[0x002C] = "half_width_close", -- ,
[0x002E] = "half_width_close", -- .
[0x003A] = "half_width_close", -- :
[0x003B] = "half_width_close", -- ;
[0x003F] = "half_width_close", -- ?
[0xFF61] = "half_width_close", -- hw full stop
--
-- full width closing punctuation
--
[0x3001] = "full_width_close", -- 、
[0x3002] = "full_width_close", -- 。
[0xFF0C] = "full_width_close", -- ,
[0xFF0E] = "full_width_close", --
--
-- depends on font
--
[0xFF01] = "full_width_close", -- !
[0xFF1F] = "full_width_close", -- ?
--
[0xFF1A] = "full_width_punct", -- :
[0xFF1B] = "full_width_punct", -- ;
--
-- non starter
--
[0x3005] = "non_starter", [0x3041] = "non_starter", [0x3043] = "non_starter", [0x3045] = "non_starter", [0x3047] = "non_starter",
[0x3049] = "non_starter", [0x3063] = "non_starter", [0x3083] = "non_starter", [0x3085] = "non_starter", [0x3087] = "non_starter",
[0x308E] = "non_starter", [0x3095] = "non_starter", [0x3096] = "non_starter", [0x309B] = "non_starter", [0x309C] = "non_starter",
[0x309D] = "non_starter", [0x309E] = "non_starter", [0x30A0] = "non_starter", [0x30A1] = "non_starter", [0x30A3] = "non_starter",
[0x30A5] = "non_starter", [0x30A7] = "non_starter", [0x30A9] = "non_starter", [0x30C3] = "non_starter", [0x30E3] = "non_starter",
[0x30E5] = "non_starter", [0x30E7] = "non_starter", [0x30EE] = "non_starter", [0x30F5] = "non_starter", [0x30F6] = "non_starter",
[0x30FC] = "non_starter", [0x30FD] = "non_starter", [0x30FE] = "non_starter", [0x31F0] = "non_starter", [0x31F1] = "non_starter",
[0x30F2] = "non_starter", [0x30F3] = "non_starter", [0x30F4] = "non_starter", [0x31F5] = "non_starter", [0x31F6] = "non_starter",
[0x30F7] = "non_starter", [0x30F8] = "non_starter", [0x30F9] = "non_starter", [0x31FA] = "non_starter", [0x31FB] = "non_starter",
[0x30FC] = "non_starter", [0x30FD] = "non_starter", [0x30FE] = "non_starter", [0x31FF] = "non_starter",
--
-- hyphenation
--
[0x2026] = "hyphen", -- … ellipsis
[0x2014] = "hyphen", -- — hyphen
--
[0x1361] = "ethiopic_word",
[0x1362] = "ethiopic_sentence",
--
}
local function provide(t,k)
local v
if not tonumber(k) then v = false
elseif (k >= 0x03040 and k <= 0x030FF)
or (k >= 0x031F0 and k <= 0x031FF)
or (k >= 0x032D0 and k <= 0x032FE)
or (k >= 0x0FF00 and k <= 0x0FFEF) then v = "katakana"
elseif (k >= 0x03400 and k <= 0x04DFF)
or (k >= 0x04E00 and k <= 0x09FFF)
or (k >= 0x0F900 and k <= 0x0FAFF)
or (k >= 0x20000 and k <= 0x2A6DF)
or (k >= 0x2F800 and k <= 0x2FA1F) then v = "chinese"
elseif (k >= 0x0AC00 and k <= 0x0D7A3) then v = "korean"
elseif (k >= 0x01100 and k <= 0x0115F) then v = "jamo_initial"
elseif (k >= 0x01160 and k <= 0x011A7) then v = "jamo_medial"
elseif (k >= 0x011A8 and k <= 0x011FF) then v = "jamo_final"
elseif (k >= 0x01200 and k <= 0x0139F) then v = "ethiopic_syllable"
else v = false
end
t[k] = v
return v
end
setmetatableindex(hash,provide)
scripts.hash = hash
local numbertodataset = allocate()
local numbertohandler = allocate()
--~ storage.register("scripts/hash", hash, "scripts.hash")
scripts.numbertodataset = numbertodataset
scripts.numbertohandler = numbertohandler
local defaults = {
inter_char_shrink_factor = 0,
inter_char_shrink_factor = 0,
inter_char_stretch_factor = 0,
inter_char_half_shrink_factor = 0,
inter_char_half_stretch_factor = 0,
inter_char_quarter_shrink_factor = 0,
inter_char_quarter_stretch_factor = 0,
inter_char_hangul_penalty = 0,
inter_word_stretch_factor = 0,
}
scripts.defaults = defaults -- so we can add more
function scripts.installmethod(handler)
local name = handler.name
handlers[name] = handler
local attributes = { }
local datasets = handler.datasets
if not datasets or not datasets.default then
report_preprocessing("missing (default) dataset in script %a",name)
datasets.default = { } -- slower but an error anyway
end
for k, v in next, datasets do
setmetatableindex(v,defaults)
end
setmetatable(attributes, {
__index = function(t,k)
local v = datasets[k] or datasets.default
local a = unsetvalue
if v then
v.name = name -- for tracing
a = #numbertodataset + 1
numbertodataset[a] = v
numbertohandler[a] = handler
end
t[k] = a
return a
end
} )
handler.attributes = attributes
end
function scripts.installdataset(specification) -- global overload
local method = specification.method
local name = specification.name
local dataset = specification.dataset
if method and name and dataset then
local parent = specification.parent or ""
local handler = handlers[method]
if handler then
local datasets = handler.datasets
if datasets then
local defaultset = datasets.default
if defaultset then
if parent ~= "" then
local p = datasets[parent]
if p then
defaultset = p
else
report_preprocessing("dataset, unknown parent %a for method %a",parent,method)
end
end
setmetatable(dataset,defaultset)
local existing = datasets[name]
if existing then
for k, v in next, existing do
existing[k] = dataset
end
else
datasets[name] = dataset
end
else
report_preprocessing("dataset, no default for method %a",method)
end
else
report_preprocessing("dataset, no datasets for method %a",method)
end
else
report_preprocessing("dataset, no method %a",method)
end
else
report_preprocessing("dataset, invalid specification") -- maybe report table
end
end
local injectorenabled = false
local splitterenabled = false
function scripts.set(name,method,preset)
local handler = handlers[method]
if handler then
if handler.injector then
if not injectorenabled then
enableaction("processors","scripts.injectors.handler")
injectorenabled = true
end
texsetattribute(a_scriptinjection,handler.attributes[preset] or unsetvalue)
end
if handler.splitter then
if not splitterenabled then
enableaction("processors","scripts.splitters.handler")
splitterenabled = true
end
texsetattribute(a_scriptsplitting,handler.attributes[preset] or unsetvalue)
end
if handler.initializer then
handler.initializer(handler)
handler.initializer = nil
end
else
texsetattribute(a_scriptinjection,unsetvalue)
texsetattribute(a_scriptsplitting,unsetvalue)
end
end
function scripts.reset()
texsetattribute(a_scriptinjection,unsetvalue)
texsetattribute(a_scriptsplitting,unsetvalue)
end
-- the following tables will become a proper installer (move to cjk/eth)
--
-- 0=gray 1=red 2=green 3=blue 4=yellow 5=magenta 6=cyan 7=x-yellow 8=x-magenta 9=x-cyan
local scriptcolors = allocate { -- todo: just named colors
korean = "trace:0",
chinese = "trace:0",
katakana = "trace:0",
hiragana = "trace:0",
full_width_open = "trace:1",
full_width_close = "trace:2",
half_width_open = "trace:3",
half_width_close = "trace:4",
full_width_punct = "trace:5",
hyphen = "trace:5",
non_starter = "trace:6",
jamo_initial = "trace:7",
jamo_medial = "trace:8",
jamo_final = "trace:9",
ethiopic_syllable = "trace:1",
ethiopic_word = "trace:2",
ethiopic_sentence = "trace:3",
}
scripts.colors = scriptcolors
local numbertocategory = allocate { -- rather bound to cjk ... will be generalized
"korean",
"chinese",
"katakana",
"hiragana",
"full_width_open",
"full_width_close",
"half_width_open",
"half_width_close",
"full_width_punct",
"hyphen",
"non_starter",
"jamo_initial",
"jamo_medial",
"jamo_final",
"ethiopic_syllable",
"ethiopic_word",
"ethiopic_sentence",
}
local categorytonumber = allocate(table.swapped(numbertocategory)) -- could be one table
scripts.categorytonumber = categorytonumber
scripts.numbertocategory = numbertocategory
local function colorize(start,stop)
for n in traverse_id(glyph_code,start) do
local kind = numbertocategory[n[a_scriptstatus]]
if kind then
local ac = scriptcolors[kind]
if ac then
setnodecolor(n,ac)
end
end
if n == stop then
break
end
end
end
local function traced_process(head,first,last,process,a)
if start ~= last then
local f, l = first, last
local name = numbertodataset[a]
name = name and name.name or "?"
report_preprocessing("before %s: %s",name,nodes.tosequence(f,l))
process(head,first,last)
report_preprocessing("after %s: %s", name,nodes.tosequence(f,l))
end
end
-- eventually we might end up with more extensive parsing
-- todo: pass t[start..stop] == original
--
-- one of the time consuming functions:
-- we can have a fonts.hashes.originals
function scripts.injectors.handler(head)
local start = first_glyph(head) -- we already have glyphs here (subtype 1)
if not start then
return head, false
else
local last_a, normal_process, lastfont, originals = nil, nil, nil, nil
local done, first, last, ok = false, nil, nil, false
while start do
local id = start.id
if id == glyph_code then
local a = start[a_scriptinjection]
if a then
if a ~= last_a then
if first then
if ok then
if trace_analyzing then
colorize(first,last)
end
if trace_injections then
traced_process(head,first,last,normal_process,last_a)
else
normal_process(head,first,last)
end
ok, done = false, true
end
first, last = nil, nil
end
last_a = a
local handler = numbertohandler[a]
normal_process = handler.injector
end
if normal_process then
local f = start.font
if f ~= lastfont then
originals = fontdata[f].resources
if resources then
originals = resources.originals
else
-- can't happen
end
lastfont = f
end
local c = start.char
if originals then
c = originals[c] or c
end
local h = hash[c]
if h then
start[a_scriptstatus] = categorytonumber[h]
if not first then
first, last = start, start
else
last = start
end
-- if cjk == "chinese" or cjk == "korean" then -- we need to prevent too much ( ) processing
ok = true
-- end
elseif first then
if ok then
if trace_analyzing then
colorize(first,last)
end
if trace_injections then
traced_process(head,first,last,normal_process,last_a)
else
normal_process(head,first,last)
end
ok, done = false, true
end
first, last = nil, nil
end
end
elseif first then
if ok then
if trace_analyzing then
colorize(first,last)
end
if trace_injections then
traced_process(head,first,last,normal_process,last_a)
else
normal_process(head,first,last)
end
ok, done = false, true
end
first, last = nil, nil
end
elseif id == glue_code then
if ok then
-- continue
elseif first then
-- no chinese or korean
first, last = nil, nil
end
elseif first then
if ok then
-- some chinese or korean
if trace_analyzing then
colorize(first,last)
end
if trace_injections then
traced_process(head,first,last,normal_process,last_a)
else
normal_process(head,first,last)
end
first, last, ok, done = nil, nil, false, true
elseif first then
first, last = nil, nil
end
end
start = start.next
end
if ok then
if trace_analyzing then
colorize(first,last)
end
if trace_injections then
traced_process(head,first,last,normal_process,last_a)
else
normal_process(head,first,last)
end
done = true
end
return head, done
end
end
function scripts.splitters.handler(head)
return head, false
end
-- new plugin:
local registercontext = fonts.specifiers.registercontext
local mergecontext = fonts.specifiers.mergecontext
local otfscripts = characters.otfscripts
local report_scripts = logs.reporter("scripts","auto feature")
local trace_scripts = false trackers.register("scripts.autofeature",function(v) trace_scripts = v end)
local autofontfeature = scripts.autofontfeature or { }
scripts.autofontfeature = autofontfeature
local cache_yes = { }
local cache_nop = { }
setmetatableindex(cache_yes,function(t,k) local v = { } t[k] = v return v end)
setmetatableindex(cache_nop,function(t,k) local v = { } t[k] = v return v end)
-- beware: we need to tag a done (otherwise too many extra instances ... but how
-- often unpack? wait till we have a bitmap
--
-- we can consider merging this in handlers.characters(head) at some point as there
-- already check for the dynamic attribute so it saves a pass, however, then we also
-- need to check for a_scriptinjection there which nils the benefit
--
-- we can consider cheating: set all glyphs in a word as the first one but it's not
-- playing nice
function autofontfeature.handler(head)
for n in traverse_id(glyph_code,head) do
-- if n[a_scriptinjection] then
-- -- already tagged by script feature, maybe some day adapt
-- else
local char = n.char
local script = otfscripts[char]
if script then
local dynamic = n[0] or 0
local font = n.font
if dynamic > 0 then
local slot = cache_yes[font]
local attr = slot[script]
if not attr then
attr = mergecontext(dynamic,name,2)
slot[script] = attr
if trace_scripts then
report_scripts("script: %s, trigger %C, dynamic: %a, variant: %a",script,char,attr,"extended")
end
end
if attr ~= 0 then
n[0] = attr
-- maybe set scriptinjection when associated
end
else
local slot = cache_nop[font]
local attr = slot[script]
if not attr then
attr = registercontext(font,script,2)
slot[script] = attr
if trace_scripts then
report_scripts("script: %s, trigger %C, dynamic: %s, variant: %a",script,char,attr,"normal")
end
end
if attr ~= 0 then
n[0] = attr
-- maybe set scriptinjection when associated
end
end
end
-- end
end
return head
end
function autofontfeature.enable()
report_scripts("globally enabled")
enableaction("processors","scripts.autofontfeature.handler")
end
function autofontfeature.disable()
report_scripts("globally disabled")
disableaction("processors","scripts.autofontfeature.handler")
end
commands.enableautofontscript = autofontfeature.enable
commands.disableautofontscript = autofontfeature.disable
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