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if not modules then modules = { } end modules ['typo-cap'] = {
version = 1.001,
comment = "companion to typo-cap.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local next, type, tonumber = next, type, tonumber
local format, insert = string.format, table.insert
local div, getrandom = math.div, utilities.randomizer.get
local trace_casing = false trackers .register("typesetters.casing", function(v) trace_casing = v end)
local check_kerns = true directives.register("typesetters.casing.checkkerns", function(v) check_kerns = v end)
local report_casing = logs.reporter("typesetting","casing")
local nodes, node = nodes, node
local nuts = nodes.nuts
local getnext = nuts.getnext
local getprev = nuts.getprev
local getid = nuts.getid
----- getattr = nuts.getattr
local takeattr = nuts.takeattr
local getfont = nuts.getfont
local getsubtype = nuts.getsubtype
local getchar = nuts.getchar
local isglyph = nuts.isglyph
local getdisc = nuts.getdisc
local setattr = nuts.setattr
local setchar = nuts.setchar
local setfont = nuts.setfont
local copy_node = nuts.copy
local end_of_math = nuts.end_of_math
local insert_after = nuts.insert_after
local find_attribute = nuts.find_attribute
local nextglyph = nuts.traversers.glyph
local nodecodes = nodes.nodecodes
local kerncodes = nodes.kerncodes
local glyph_code = nodecodes.glyph
local kern_code = nodecodes.kern
local disc_code = nodecodes.disc
local math_code = nodecodes.math
local fontkern_code = kerncodes.fontkern
local enableaction = nodes.tasks.enableaction
local newkern = nuts.pool.kern
local fonthashes = fonts.hashes
local fontdata = fonthashes.identifiers
local fontchar = fonthashes.characters
local variables = interfaces.variables
local v_reset = variables.reset
local texsetattribute = tex.setattribute
local unsetvalue = attributes.unsetvalue
typesetters = typesetters or { }
local typesetters = typesetters
typesetters.cases = typesetters.cases or { }
local cases = typesetters.cases
cases.actions = { }
local actions = cases.actions
local a_cases = attributes.private("case")
local extract = bit32.extract
local run = 0 -- a trick to make neighbouring ranges work
local blocked = { }
local function set(tag,font)
if run == 0x40 then -- 2^6
run = 1
else
run = run + 1
end
local a = font * 0x10000 + tag * 0x100 + run
blocked[a] = false
return a
end
local function get(a)
return
extract(a, 8, 8), -- tag
extract(a,16,12), -- font
extract(a, 0, 8) -- run
end
-- a previous implementation used char(0) as placeholder for the larger font, so we needed
-- to remove it before it can do further harm ... that was too tricky as we use char 0 for
-- other cases too
--
-- we could do the whole glyph run here (till no more attributes match) but then we end up
-- with more code .. maybe i will clean this up anyway as the lastfont hack is somewhat ugly
-- ... on the other hand, we need to deal with cases like:
--
-- \WORD {far too \Word{many \WORD{more \word{pushed} in between} useless} words}
local uccodes = characters.uccodes
local lccodes = characters.lccodes
local categories = characters.categories
-- true false true == mixed
local function replacer(start,codes)
local char, fnt = isglyph(start)
local dc = codes[char]
if dc then
local ifc = fontchar[fnt]
if type(dc) == "table" then
for i=1,#dc do
if not ifc[dc[i]] then
return start, false
end
end
for i=#dc,1,-1 do
local chr = dc[i]
if i == 1 then
setchar(start,chr)
else
local g = copy_node(start)
setchar(g,chr)
insert_after(start,start,g)
end
end
elseif ifc[dc] then
setchar(start,dc)
end
end
return start
end
local registered, n = { }, 0
local function register(name,f)
if type(f) == "function" then
n = n + 1
actions[n] = f
registered[name] = n
return n
else
local n = registered[f]
registered[name] = n
return n
end
end
cases.register = register
local function WORD(start,attr,lastfont,n,count,where,first)
lastfont[n] = false
return replacer(first or start,uccodes)
end
local function word(start,attr,lastfont,n,count,where,first)
lastfont[n] = false
return replacer(first or start,lccodes)
end
local function Words(start,attr,lastfont,n,count,where,first) -- looks quite complex
if where == "post" then
return
end
if count == 1 and where ~= "post" then
replacer(first or start,uccodes)
return start, true
else
return start, true
end
end
local function Word(start,attr,lastfont,n,count,where,first)
blocked[attr] = true
return Words(start,attr,lastfont,n,count,where,first)
end
local function camel(start,attr,lastfont,n,count,where,first)
word(start,attr,lastfont,n,count,where,first)
Words(start,attr,lastfont,n,count,where,first)
return start, true
end
-- local function mixed(start,attr,lastfont,n,count,where,first)
-- if where == "post" then
-- return
-- end
-- local used = first or start
-- local char = getchar(first)
-- local dc = uccodes[char]
-- if not dc then
-- -- quit
-- elseif dc == char then
-- local lfa = lastfont[n]
-- if lfa then
-- setfont(first,lfa)
-- end
-- else
-- replacer(first or start,uccodes)
-- end
-- return start, true
-- end
local function mixed(start,attr,lastfont,n,count,where,first)
if where == "post" then
return
end
local used = first or start
local char = getchar(used)
local dc = uccodes[char]
if not dc then
-- quit
elseif dc == char then
local lfa = lastfont[n]
if lfa then
setfont(used,lfa)
end
elseif check_kerns then
local p = getprev(used)
if p and getid(p) == glyph_code then
local c = lccodes[char]
local c = type(c) == "table" and c[1] or c
replacer(used,uccodes)
local fp = getfont(p)
local fc = getfont(used)
if fp ~= fc then
local k = fonts.getkern(fontdata[fp],getchar(p),c)
if k ~= 0 then
insert_after(p,p,newkern(k))
end
end
else
replacer(used,uccodes)
end
else
replacer(used,uccodes)
end
return start, true
end
local function Capital(start,attr,lastfont,n,count,where,first,once) -- 3
local used = first or start
if count == 1 and where ~= "post" then
local lfa = lastfont[n]
if lfa then
local dc = uccodes[getchar(used)]
if dc then
setfont(used,lfa)
end
end
end
local s, c = replacer(first or start,uccodes)
if once then
lastfont[n] = false -- here
end
return start, c
end
local function capital(start,attr,lastfont,n,where,count,first,count) -- 4
return Capital(start,attr,lastfont,n,where,count,first,true)
end
local function none(start,attr,lastfont,n,count,where,first)
return start, true
end
local function randomized(start,attr,lastfont,n,count,where,first)
local used = first or start
local char = getchar(used)
local font = getfont(used)
local tfm = fontchar[font]
lastfont[n] = false
local kind = categories[char]
if kind == "lu" then
while true do
local n = getrandom("capital lu",0x41,0x5A)
if tfm[n] then -- this also intercepts tables
setchar(used,n)
return start
end
end
elseif kind == "ll" then
while true do
local n = getrandom("capital ll",0x61,0x7A)
if tfm[n] then -- this also intercepts tables
setchar(used,n)
return start
end
end
end
return start
end
register(variables.WORD, WORD) -- 1
register(variables.word, word) -- 2
register(variables.Word, Word) -- 3
register(variables.Words, Words) -- 4
register(variables.capital,capital) -- 5
register(variables.Capital,Capital) -- 6
register(variables.none, none) -- 7 (dummy)
register(variables.random, randomized) -- 8
register(variables.mixed, mixed) -- 9
register(variables.camel, camel) -- 10
register(variables.cap, variables.capital) -- clone
register(variables.Cap, variables.Capital) -- clone
-- This can be more clever: when we unset we can actually use the same attr ref if
-- needed. Using properties to block further usage is not faster.
function cases.handler(head) -- not real fast but also not used on much data
local start = head
local lastfont = { }
local lastattr = nil
local count = 0
local previd = nil
local prev = nil
while start do -- while because start can jump ahead
local id = getid(start)
if id == glyph_code then
-- local attr = getattr(start,a_cases)
local attr = takeattr(start,a_cases)
if attr and attr > 0 and not blocked[attr] then
if attr ~= lastattr then
lastattr = attr
count = 1
else
count = count + 1
end
-- setattr(start,a_cases,unsetvalue) -- not needed
local n, id, m = get(attr)
if lastfont[n] == nil then
lastfont[n] = id
end
local action = actions[n] -- map back to low number
if action then
local quit
start, quit = action(start,attr,lastfont,n,count)
if trace_casing then
report_casing("case trigger %a, instance %a, fontid %a, result %a",n,m,id,quit and "-" or "+")
end
elseif trace_casing then
report_casing("unknown case trigger %a",n)
end
end
elseif id == disc_code then
-- local attr = getattr(start,a_cases)
local attr = takeattr(start,a_cases)
if attr and attr > 0 and not blocked[attr] then
if attr ~= lastattr then
lastattr = attr
count = 0
end
-- setattr(start,a_cases,unsetvalue) -- not needed
local n, id, m = get(attr)
if lastfont[n] == nil then
lastfont[n] = id
end
local action = actions[n] -- map back to low number
if action then
local pre, post, replace = getdisc(start)
if replace then
local cnt = count
for g in nextglyph, replace do
cnt = cnt + 1
takeattr(g,a_cases)
-- setattr(g,a_cases,unsetvalue)
local h, quit = action(start,attr,lastfont,n,cnt,"replace",g)
if quit then
break
end
end
end
if pre then
local cnt = count
for g in nextglyph, pre do
cnt = cnt + 1
takeattr(g,a_cases)
-- setattr(g,a_cases,unsetvalue)
local h, quit = action(start,attr,lastfont,n,cnt,"pre",g)
if quit then
break
end
end
end
if post then
local cnt = count
for g in nextglyph, post do
cnt = cnt + 1
takeattr(g,a_cases)
-- setattr(g,a_cases,unsetvalue)
local h, quit = action(start,attr,lastfont,n,cnt,"post",g)
if quit then
break
end
end
end
end
count = count + 1
end
elseif id == math_code then
start = end_of_math(start)
count = 0
elseif prev_id == kern_code and getsubtype(prev) == fontkern_code then
-- still inside a word ...normally kerns are added later
else
count = 0
end
if start then
prev = start
previd = id
start = getnext(start)
end
end
return head
end
-- function cases.handler(head) -- not real fast but also not used on much data
-- local attr, start = find_attribute(head,a_cases)
-- if not start then
-- return head, false
-- end
-- local lastfont = { }
-- local lastattr = nil
-- local count = 0
-- local previd = nil
-- local prev = nil
-- while start do
-- while start do -- while because start can jump ahead
-- local id = getid(start)
-- if id == glyph_code then
-- -- local attr = getattr(start,a_cases)
-- local attr = takeattr(start,a_cases)
-- if attr and attr > 0 and not blocked[attr] then
-- if attr ~= lastattr then
-- lastattr = attr
-- count = 1
-- else
-- count = count + 1
-- end
-- -- setattr(start,a_cases,unsetvalue) -- not needed
-- local n, id, m = get(attr)
-- if lastfont[n] == nil then
-- lastfont[n] = id
-- end
-- local action = actions[n] -- map back to low number
-- if action then
-- start = action(start,attr,lastfont,n,count)
-- if trace_casing then
-- report_casing("case trigger %a, instance %a, fontid %a, result %a",n,m,id,ok)
-- end
-- elseif trace_casing then
-- report_casing("unknown case trigger %a",n)
-- end
-- end
-- elseif id == disc_code then
-- -- local attr = getattr(start,a_cases)
-- local attr = takeattr(start,a_cases)
-- if attr and attr > 0 and not blocked[attr] then
-- if attr ~= lastattr then
-- lastattr = attr
-- count = 0
-- end
-- -- setattr(start,a_cases,unsetvalue) -- not needed
-- local n, id, m = get(attr)
-- if lastfont[n] == nil then
-- lastfont[n] = id
-- end
-- local action = actions[n] -- map back to low number
-- if action then
-- local pre, post, replace = getdisc(start)
-- if replace then
-- local cnt = count
-- for g in glyph_code, replace do
-- cnt = cnt + 1
-- takeattr(g,a_cases)
-- -- setattr(g,a_cases,unsetvalue)
-- local h, quit = action(start,attr,lastfont,n,cnt,"replace",g)
-- if quit then
-- break
-- end
-- end
-- end
-- if pre then
-- local cnt = count
-- for g in nextglyph, pre do
-- cnt = cnt + 1
-- takeattr(g,a_cases)
-- -- setattr(g,a_cases,unsetvalue)
-- local h, quit = action(start,attr,lastfont,n,cnt,"pre",g)
-- if quit then
-- break
-- end
-- end
-- end
-- if post then
-- local cnt = count
-- for g in nextglyph, post do
-- cnt = cnt + 1
-- takeattr(g,a_cases)
-- -- setattr(g,a_cases,unsetvalue)
-- local h, quit = action(start,attr,lastfont,n,cnt,"post",g)
-- if quit then
-- break
-- end
-- end
-- end
-- end
-- count = count + 1
-- end
-- elseif id == math_code then
-- start = end_of_math(start)
-- count = 0
-- elseif prev_id == kern_code and getsubtype(prev) == fontkern_code then
-- -- still inside a word ...normally kerns are added later
-- else
-- count = 0
-- start = getnext(start)
-- break
-- end
-- if start then
-- prev = start
-- previd = id
-- start = getnext(start)
-- end
-- end
-- if start then
-- attr, start = find_attribute(start,a_cases)
-- end
-- end
-- return head
-- end
-- function cases.handler(head) -- let's assume head doesn't change ... no reason
-- local lastfont = { }
-- for first, last, size, attr in nuts.words(head,a_cases) do
-- local n, id, m = get(attr)
-- if lastfont[n] == nil then
-- lastfont[n] = id
-- end
-- local action = actions[n]
-- if action then
-- action(first,attr,lastfont,n)
-- end
-- end
-- return head
-- end
local enabled = false
function cases.set(n,id)
if n == v_reset then
n = unsetvalue
else
n = registered[n] or tonumber(n)
if n then
if not enabled then
enableaction("processors","typesetters.cases.handler")
if trace_casing then
report_casing("enabling case handler")
end
enabled = true
end
n = set(n,id)
else
n = unsetvalue
end
end
texsetattribute(a_cases,n)
-- return n -- bonus
end
-- interface
interfaces.implement {
name = "setcharactercasing",
actions = cases.set,
arguments = { "string", "integer" }
}
|