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|
if not modules then modules = { } end modules ['buff-ini'] = {
version = 1.001,
comment = "companion to core-buf.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- ctx lua reference model / hooks and such
-- to be optimized
-- redefine buffers.get
buffers = { }
buffers.data = { }
buffers.hooks = { }
buffers.flags = { }
buffers.commands = { }
buffers.visualizers = { }
-- if needed we can make 'm local
local trace_run = false trackers.register("buffers.run", function(v) trace_run = v end)
local trace_visualize = false trackers.register("buffers.visualize", function(v) trace_visualize = v end)
local utf = unicode.utf8
local concat, texsprint, texprint, texwrite = table.concat, tex.sprint, tex.print, tex.write
local utfbyte, utffind, utfgsub = utf.byte, utf.find, utf.gsub
local type, next = type, next
local huge = math.huge
local byte, sub, find, char, gsub, rep, lower, format, gmatch, match = string.byte, string.sub, string.find, string.char, string.gsub, string.rep, string.lower, string.format, string.gmatch, string.match
local utfcharacters, utfvalues = string.utfcharacters, string.utfvalues
local ctxcatcodes = tex.ctxcatcodes
local variables = interfaces.variables
local lpegmatch = lpeg.match
local data, flags, hooks, visualizers = buffers.data, buffers.flags, buffers.hooks, buffers.visualizers
visualizers.defaultname = variables.typing
function buffers.raw(name)
return data[name] or { }
end
function buffers.erase(name)
data[name] = nil
end
function buffers.set(name, str)
data[name] = { str } -- CHECK THIS
end
function buffers.append(name, str)
data[name] = (data[name] or "") .. str
end
buffers.flags.store_as_table = true
-- to be sorted out: crlf + \ ; slow now
local n = 0
function buffers.grab(name,begintag,endtag,bufferdata)
local dn = data[name] or ""
if dn == "" then
buffers.level = 0
end
buffers.level = buffers.level + bufferdata:count("\\"..begintag) - bufferdata:count("\\"..endtag)
local more = buffers.level > 0
if more then
dn = dn .. bufferdata .. endtag
buffers.level = buffers.level - 1
else
if dn == "" then
dn = sub(bufferdata,1,#bufferdata-1)
else
dn = dn .. "\n" .. sub(bufferdata,1,#bufferdata-1)
end
dn = gsub(dn,"[\010\013]$","")
if flags.store_as_table then
dn = dn:splitlines()
end
end
data[name] = dn
cs.testcase(more)
end
function buffers.exists(name)
return data[name] ~= nil
end
function buffers.doifelsebuffer(name)
cs.testcase(data[name] ~= nil)
end
flags.optimize_verbatim = true
flags.count_empty_lines = false
local no_break_command = "\\doverbatimnobreak"
local do_break_command = "\\doverbatimgoodbreak"
local begin_of_line_command = "\\doverbatimbeginofline"
local end_of_line_command = "\\doverbatimendofline"
local empty_line_command = "\\doverbatimemptyline"
local begin_of_display_command = "\\doverbatimbeginofdisplay"
local end_of_display_command = "\\doverbatimendofdisplay"
local begin_of_inline_command = "\\doverbatimbeginofinline"
local end_of_inline_command = "\\doverbatimendofinline"
function buffers.verbatimbreak(n,m)
if flags.optimize_verbatim then
if n == 2 or n == m then
texsprint(no_break_command)
elseif n > 1 then
texsprint(do_break_command)
end
end
end
function buffers.strip(lines,first,last)
local first, last = first or 1, last or #lines
for i=first,last do
local li = lines[i]
if #li == 0 or find(li,"^%s*$") then
first = first + 1
else
break
end
end
for i=last,first,-1 do
local li = lines[i]
if #li == 0 or find(li,"^%s*$") then
last = last - 1
else
break
end
end
return first, last, last - first + 1
end
function buffers.range(lines,first,last,range) -- 1,3 1,+3 fromhere,tothere
local first, last = first or 1, last or #lines
local what = aux.settings_to_array(range)
local r_first, r_last = what[1], what[2]
local f, l = tonumber(r_first), tonumber(r_last)
if r_first then
if f then
if f > first then
first = f
end
else
for i=first,last do
if find(lines[i],r_first) then
first, strip = i + 1
break
end
end
end
end
if r_last then
if l then
if find(r_last,"^[%+]") then -- 1,+3
l = first + l
end
if l < last then
last = l
end
else
for i=first,last do
if find(lines[i],r_last) then
last = i - 1
break
end
end
end
end
return first, last
end
function buffers.type(name,realign,range)
local lines = data[name]
local action = buffers.typeline
if lines then
if type(lines) == "string" then
lines = lines:splitlines()
data[name] = lines
end
if realign then
lines = buffers.realign(lines,realign)
end
local line, n = 0, 0
local first, last, m = buffers.strip(lines)
if range then
first, last = buffers.range(lines,first,last,range)
first, last = buffers.strip(lines,first,last)
end
hooks.begin_of_display()
for i=first,last do
n, line = action(lines[i], n, m, line)
end
hooks.end_of_display()
end
end
function buffers.loaddata(filename) -- this one might go away
-- this will be cleaned up when we have split supp-fil completely
-- instead of half-half
local ok, str, n = resolvers.loaders.tex(filename)
if not str then
ok, str, n = resolvers.loaders.tex(file.addsuffix(filename,'tex'))
end
end
function buffers.loaddata(filename) -- this one might go away
local foundname = resolvers.findtexfile(filename) or ""
if foundname == "" then
foundname = resolvers.findtexfile(file.addsuffix(filename,'tex')) or ""
end
if foundname == "" then
return ""
else
return resolvers.loadtexfile(foundname)
end
end
function buffers.typefile(name,realign,range) -- still somewhat messy, since name can be be suffixless
local str = buffers.loaddata(name)
if str and str~= "" then
local lines = str:splitlines()
if realign then
lines = buffers.realign(lines,realign)
end
local line, n, action = 0, 0, buffers.typeline
local first, last, m = buffers.strip(lines)
hooks.begin_of_display()
if range then
first, last = buffers.range(lines,first,last,range)
first, last = buffers.strip(lines,first,last)
end
for i=first,last do
n, line = action(lines[i], n, m, line)
end
hooks.end_of_display()
end
end
function buffers.typeline(str,n,m,line)
n = n + 1
buffers.verbatimbreak(n,m)
if find(str,"%S") then
line = line + 1
hooks.begin_of_line(line)
hooks.flush_line(hooks.line(str))
hooks.end_of_line()
else
if flags.count_empty_lines then
line = line + 1
end
hooks.empty_line(line)
end
return n, line
end
-- The optional prefix hack is there for the typesetbuffer feature and
-- in mkii we needed that (this hidden feature is used in a manual).
local function prepared(name,list) -- list is optional
if not list or list == "" then
list = name
end
if not name or name == "" then
name = tex.jobname .. "-" .. list .. ".tmp"
end
local content = buffers.collect(list,nil) or ""
if content == "" then
content = "empty buffer"
end
return name, content
end
local capsule = "\\starttext\n%s\n\\stoptext\n"
local command = "context %s"
function buffers.save(name,list,encapsulate) -- list is optional
local name, content = prepared(name,list)
io.savedata(name, (encapsulate and format(capsule,content)) or content)
end
function commands.savebuffer(list,name) -- name is optional
buffers.save(name,list)
end
function buffers.run(name,list,encapsulate)
local name, content = prepared(name,list)
local data = io.loaddata(name)
content = (encapsulate and format(capsule,content)) or content
if data ~= content then
if trace_run then
commands.writestatus("buffers","changes in '%s', processing forced",name)
end
io.savedata(name,content)
os.execute(format(command,name))
elseif trace_run then
commands.writestatus("buffers","no changes in '%s', not processed",name)
end
end
local printer = (lpeg.patterns.textline/texprint)^0
function buffers.get(name)
local b = buffers.data[name]
if b then
if type(b) == "table" then
for i=1,#b do
texprint(b[i])
end
else
lpegmatch(printer,b)
end
end
end
local function content(name,separator) -- no print
local b = data[name]
if b then
if type(b) == "table" then
return concat(b,separator or "\n")
else
return b
end
else
return ""
end
end
buffers.content = content
function buffers.collect(names,separator) -- no print
-- maybe we should always store a buffer as table so
-- that we can pass it directly
if type(names) == "string" then
names = aux.settings_to_array(names)
end
local t = { }
for i=1,#names do
local c = content(names[i],separator)
if c ~= "" then
t[#t+1] = c
end
end
return concat(t,separator or "\r") -- "\n" is safer due to comments and such
end
function buffers.feedback(names,separator)
-- don't change the texprint into texsprint as it fails on mp buffers
-- because (p<nl>enddef) becomes penddef then
texprint(ctxcatcodes,string.splitlines(buffers.collect(names,separator)))
end
local function tobyte(c)
return " [" .. utfbyte(c) .. "] "
end
function buffers.inspect(name)
local b = data[name]
if b then
if type(b) == "table" then
for k=1,#b do
local v = b[k]
if v == "" then
texsprint(ctxcatcodes,"[crlf]\\par ") -- space ?
else
texsprint(ctxcatcodes,(gsub(v,"(.)",tobyte)),"\\par")
end
end
else
texsprint(ctxcatcodes,(gsub(b,"(.)",tobyte)))
end
end
end
-- maybe just line(n,str) empty(n,str)
visualizers.tablength = 7
visualizers.enabletab = true -- false
visualizers.obeyspace = true
function buffers.settablength(tablength)
visualizers.tablength = tablength and tonumber(tablength) or 7
end
visualizers.handlers = visualizers.handlers or { }
local handlers = visualizers.handlers
function buffers.newvisualizer(name)
name = lower(name)
local handler = { }
handlers[name] = handler
return handler
end
function buffers.getvisualizer(name)
name = lower(name)
return handlers[name] or buffers.loadvisualizer(name)
end
function buffers.loadvisualizer(name)
name = lower(name)
local hn = handlers[name]
if hn then
return hn
else
environment.loadluafile("pret-" .. name)
local hn = handlers[name]
if not hn then
-- hn = buffers.newvisualizer(name)
hn = handlers[visualizers.defaultname]
handlers[name] = hn
if trace_visualize then
logs.report("buffers","mapping '%s' visualizer onto '%s'",name,visualizers.defaultname)
end
elseif trace_visualize then
logs.report("buffers","loading '%s' visualizer",name)
end
return hn
end
end
-- was "default", should be set at tex end (todo)
local default = buffers.newvisualizer(visualizers.defaultname)
--~ print(variables.typing) os.exit()
-- will become cleaner
local currentvisualizer, currenthandler
function buffers.setvisualizer(str)
currentvisualizer = lower(str)
currenthandler = handlers[currentvisualizer]
if currenthandler then
-- if trace_visualize then
-- logs.report("buffers","enabling specific '%s' visualizer",currentvisualizer)
-- end
else
currentvisualizer = visualizers.defaultname
currenthandler = handlers.default
-- if trace_visualize then
-- logs.report("buffers","enabling default visualizer '%s'",currentvisualizer)
-- end
end
if currenthandler.reset then
currenthandler.reset()
end
end
function buffers.resetvisualizer()
currentvisualizer = visualizers.defaultname
currenthandler = handlers.default
if currenthandler.reset then
currenthandler.reset()
end
end
buffers.setvisualizer(visualizers.defaultname)
function visualizers.reset()
end
function buffers.doifelsevisualizer(str)
cs.testcase((str ~= "") and (handlers[lower(str)] ~= nil))
end
-- calling routines, don't change
function hooks.begin_of_display()
(currenthandler.begin_of_display or default.begin_of_display)(currentvisualizer)
end
function hooks.end_of_display()
(currenthandler.end_of_display or default.end_of_display)()
end
function hooks.begin_of_inline()
(currenthandler.begin_of_inline or default.begin_of_inline)(currentvisualizer)
end
function hooks.end_of_inline()
(currenthandler.end_of_inline or default.end_of_inline)()
end
function hooks.flush_line(str,nesting)
local fl = currenthandler.flush_line
if fl then
str = gsub(str," *[\n\r]+ *"," ") ; -- semi colon needed
fl(str,nesting)
else
-- gsub done later
default.flush_line(str,nesting)
end
end
function hooks.flush_inline(str,nesting)
hooks.begin_of_inline()
hooks.flush_line(str,nesting)
hooks.end_of_inline()
end
function hooks.begin_of_line(n)
(currenthandler.begin_of_line or default.begin_of_line)(n)
end
function hooks.end_of_line()
(currenthandler.end_of_line or default.end_of_line)()
end
function hooks.empty_line()
(currenthandler.empty_line or default.empty_line)()
end
function hooks.line(str)
if visualizers.enabletab then
str = string.tabtospace(str,visualizers.tablength)
else
str = gsub(str,"\t"," ")
end
return (currenthandler.line or default.line)(str)
end
-- defaults
function default.begin_of_display(currentvisualizer)
texsprint(ctxcatcodes,begin_of_display_command,"{",currentvisualizer,"}")
end
function default.end_of_display()
texsprint(ctxcatcodes,end_of_display_command)
end
function default.begin_of_inline(currentvisualizer)
texsprint(ctxcatcodes,begin_of_inline_command,"{",currentvisualizer,"}")
end
function default.end_of_inline()
texsprint(ctxcatcodes,end_of_inline_command)
end
function default.begin_of_line(n)
texsprint(ctxcatcodes, begin_of_line_command,"{",n,"}")
end
function default.end_of_line()
texsprint(ctxcatcodes,end_of_line_command)
end
function default.empty_line()
texsprint(ctxcatcodes,empty_line_command)
end
function default.line(str)
return str
end
function default.flush_line(str)
str = gsub(str," *[\n\r]+ *"," ")
if visualizers.obeyspace then
for c in utfcharacters(str) do
if c == " " then
texsprint(ctxcatcodes,"\\obs")
else
texwrite(c)
end
end
else
texwrite(str)
end
end
-- not needed any more
local function escaped_token(c)
if utffind(c,"^(%a%d)$") then
return c
elseif c == " " then
return "\\obs "
else
return "\\char" .. utfbyte(c) .. " "
end
end
buffers.escaped_token = escaped_token
function buffers.escaped(str)
-- use the utfcharacters loop
return (utfgsub(str,"(.)", escaped_token))
end
-- special one
buffers.commands.nested = "\\switchslantedtype "
-- todo : utf + faster, direct print and such. no \\char, vrb catcodes, see end
function visualizers.flush_nested(str, enable) -- no utf, kind of obsolete mess
str = gsub(str," *[\n\r]+ *"," ")
local result, c, nested, i = "", "", 0, 1
local commands = buffers.commands -- otherwise wrong commands
while i < #str do -- slow
c = sub(str,i,i+1)
if c == "<<" then
nested = nested + 1
if enable then
result = result .. "{" .. commands.nested
else
result = result .. "{"
end
i = i + 2
elseif c == ">>" then
if nested > 0 then
nested = nested - 1
result = result .. "}"
end
i = i + 2
else
c = sub(str,i,i)
if c == " " then
result = result .. "\\obs "
elseif find(c,"%a") then
result = result .. c
else
result = result .. "\\char" .. byte(c) .. " "
end
i = i + 1
end
end
result = result .. "\\char" .. byte(sub(str,i,i)) .. " " .. rep("}",nested)
texsprint(ctxcatcodes,result)
end
-- handy helpers
--
-- \sop[color] switch_of_pretty
-- \bop[color] begin_of_pretty
-- \eop end_of_pretty
-- \obs obeyedspace
-- \char <n> special characters
buffers.currentcolors = { }
function buffers.change_state(n, state)
if n then
if state ~= n then
if state > 0 then
texsprint(ctxcatcodes,"\\sop[",buffers.currentcolors[n],"]")
else
texsprint(ctxcatcodes,"\\bop[",buffers.currentcolors[n],"]")
end
return n
end
elseif state > 0 then
texsprint(ctxcatcodes,"\\eop")
return 0
end
return state
end
function buffers.finish_state(state)
if state > 0 then
texsprint(ctxcatcodes,"\\eop")
return 0
else
return state
end
end
buffers.open_nested = rep("\\char"..byte('<').." ",2)
buffers.close_nested = rep("\\char"..byte('>').." ",2)
function buffers.replace_nested(result)
result = gsub(result,buffers.open_nested, "{")
result = gsub(result,buffers.close_nested,"}")
return result
end
function buffers.flush_result(result,nested)
if nested then
texsprint(ctxcatcodes,buffers.replace_nested(concat(result,"")))
else
texsprint(ctxcatcodes,concat(result,""))
end
end
-- new
function buffers.realign(name,forced_n) -- no, auto, <number>
local n, d
if type(name) == "string" then
d = data[name]
if type(d) == "string" then
d = d:splitlines()
end
else
d = name -- already a buffer
end
forced_n = (forced_n == variables.auto and huge) or tonumber(forced_n)
if forced_n then
for i=1, #d do
local spaces = find(d[i],"%S")
if not spaces then
-- empty line
elseif not n then
n = spaces
elseif spaces == 0 then
n = 0
break
elseif n > spaces then
n = spaces
end
end
if n > 0 then
if n > forced_n then
n = forced_n
end
for i=1,#d do
d[i] = sub(d[i],n)
end
end
end
return d
end
-- escapes: buffers.set_escape("tex","/BTEX","/ETEX")
local function flush_escaped_line(str,pattern,flushline)
while true do
local a, b, c = match(str,pattern)
if a and a ~= "" then
flushline(a)
end
if b and b ~= "" then
texsprint(ctxcatcodes,"{",b,"}")
end
if c then
if c == "" then
break
else
str = c
end
else
flushline(str)
break
end
end
end
function buffers.set_escape(name,pair)
if pair and pair ~= "" then
local visualizer = buffers.getvisualizer(name)
visualizer.normal_flush_line = visualizer.normal_flush_line or visualizer.flush_line
if pair == variables.no then
visualizer.flush_line = visualizer.normal_flush_line or visualizer.flush_line
if trace_visualize then
logs.report("buffers","resetting escape range for visualizer '%s'",name)
end
else
local start, stop
if pair == variables.yes then
start, stop = "/BTEX", "/ETEX"
else
pair = string.split(pair,",")
start, stop = string.esc(pair[1] or ""), string.esc(pair[2] or "")
end
if start ~= "" then
local pattern
if stop == "" then
pattern = "^(.-)" .. start .. "(.*)(.*)$"
else
pattern = "^(.-)" .. start .. "(.-)" .. stop .. "(.*)$"
end
function visualizer.flush_line(str)
flush_escaped_line(str,pattern,visualizer.normal_flush_line)
end
if trace_visualize then
logs.report("buffers","setting escape range for visualizer '%s' to %s -> %s",name,start,stop)
end
elseif trace_visualize then
logs.report("buffers","problematic escape specification '%s' for visualizer '%s'",pair,name)
end
end
end
end
-- THIS WILL BECOME A FRAMEWORK: the problem with prety printing is that
-- we deal with snippets and therefore we need tolerant parsing
--~ local type = type
--~ visualizers = visualizers or { }
--~ local function fallback(s) return s end
--~ function visualizers.visualize(visualizer,kind,pattern)
--~ if type(visualizer) == "table" and type(kind) == "string" then
--~ kind = visualizer[kind] or visualizer.default or fallback
--~ else
--~ kind = fallback
--~ end
--~ return (lpeg.C(pattern))/kind
--~ end
--~ local flusher = texio.write
--~ local format = string.format
--~ local visualizer = {
--~ word = function(s) return flusher(format("\\bold{%s}",s)) end,
--~ number = function(s) return flusher(format("\\slanted{%s}",s)) end,
--~ default = function(s) return flusher(s) end,
--~ }
--~ local word = lpeg.R("AZ","az")^1
--~ local number = lpeg.R("09")^1
--~ local any = lpeg.P(1)
--~ local pattern = lpeg.P { "start",
--~ start = (
--~ visualizers.visualize(visualizer,"word",word) +
--~ visualizers.visualize(visualizer,"number",number) +
--~ visualizers.visualize(visualizer,"default",any)
--~ )^1
--~ }
--~ str = [[test 123 test $oeps$]]
--~ lpegmatch(pattern,str)
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