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|
if not modules then modules = { } end modules ['driv-shp'] = {
version = 1.001,
optimize = true,
comment = "companion to driv-ini.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local type, next = type, next
local setmetatableindex = table.setmetatableindex
local formatters = string.formatters
local concat = table.concat
local keys = table.keys
local sortedhash = table.sortedhash
local find = string.find
local stripstring = string.strip
local sequenced = table.sequenced
local round = math.round
local nuts = nodes.nuts
local tonut = nodes.tonut
local tonode = nodes.tonode
local getdirection = nuts.getdirection
local getlist = nuts.getlist
local getoffsets = nuts.getoffsets
local getorientation = nuts.getorientation
local getxyscales = nuts.getxyscales
local getwhd = nuts.getwhd
local getkern = nuts.getkern
local getheight = nuts.getheight
local getdepth = nuts.getdepth
----- getwidth = nuts.getwidth
local getnext = nuts.getnext
local getsubtype = nuts.getsubtype
local getid = nuts.getid
local getleader = nuts.getleader
----- getglue = nuts.getglue
local getshift = nuts.getshift
local getreplace = nuts.getreplace
local setreplace = nuts.setreplace
local getfont = nuts.getfont
local getkerndimension = nuts.getkerndimension
local getglyphdimensions = nuts.getglyphdimensions
local setdirection = nuts.setdirection
local setlink = nuts.setlink
local isglyph = nuts.isglyph
----- nextdir = nuts.traversers.dir
local nextnode = nuts.traversers.node
local effectiveglue = nuts.effectiveglue
local dirdimensions = nuts.dirdimensions
local fonthashes = fonts.hashes
local fontdata = fonthashes.identifiers
local characters = fonthashes.characters
local parameters = fonthashes.parameters
local nodecodes = nodes.nodecodes
local whatsitcodes = nodes.whatsitcodes
local gluecodes = nodes.gluecodes
local dirvalues = nodes.dirvalues
local subtypes = nodes.subtypes
local lefttoright_code = dirvalues.lefttoright
local righttoleft_code = dirvalues.righttoleft
local glyph_code = nodecodes.glyph
local kern_code = nodecodes.kern
local glue_code = nodecodes.glue
local hlist_code = nodecodes.hlist
local vlist_code = nodecodes.vlist
local dir_code = nodecodes.dir
local disc_code = nodecodes.disc
local math_code = nodecodes.math
local rule_code = nodecodes.rule
local whatsit_code = nodecodes.whatsit
local leaders_code = gluecodes.leaders
local cleaders_code = gluecodes.cleaders
local xleaders_code = gluecodes.xleaders
local gleaders_code = gluecodes.gleaders
local spaceskip_code = gluecodes.spaceskip
local getpagedimensions = layouts.getpagedimensions
local drivers = drivers
local report = logs.reporter("drivers")
---------------------------------------------------------------------------------------
local lastfont = nil
local fontcharacters = nil
local magicconstants = tex.magicconstants
local maxdimen = magicconstants.maxdimen
local runningrule = magicconstants.runningrule
local pos_h = 0
local pos_v = 0
local pos_r = lefttoright_code
local shippingmode = "none"
local shipbox_h = 0
local shipbox_v = 0
local page_size_h = 0
local page_size_v = 0
local initialize
local finalize
local updatefontstate
local pushorientation
local poporientation
local flushcharacter
local flushfontchar
local flushrule
local flushliteral
local flushwhatsit
-- make local
function drivers.getpos () return round(pos_h), round(pos_v) end
function drivers.getrpos() return round(pos_h), round(pos_v), pos_r end
function drivers.gethpos() return round(pos_h) end
function drivers.getvpos() return round(pos_v) end
-- characters
local flush_character do
local stack = setmetatableindex("table")
local level = 0
local nesting = 0
local main = 0
-- experiment (smaller page stream but might be fragile)
local tospace = false directives.register("backends.spaces", function(v) tospace = v end)
-- todo: cache streams
local default = 16384 -- * number.dimenfactors.bp -- 65536 // 4
local vfinjectors = fonts.helpers.vfinjectors
-- current can go
local function flush_vf_packet(current,pos_h,pos_v,pos_r,font,char,data,csx,csy,factor,sx,sy,vfcommands)
if nesting > 100 then
return
elseif nesting == 0 then
main = font
end
nesting = nesting + 1
local saved_h = pos_h
local saved_v = pos_v
local saved_r = pos_r
pos_r = lefttoright_code
local fdata = fontdata[font] -- offsets etc
local fnt = font
local fonts = fdata.fonts
local siz = (fdata.parameters.factor or 1)/65536
-- An alternative where we (here) locally define handlers like this:
--
-- if not vfinjectors then
-- function vfinjectors.char(hpos,vpos,packet)
-- -- .... access: font, char, factor, sx, xy
-- end
-- end
--
-- doesn't work because accessing the parameters passed to the outer function doesn't
-- work as expected (so we end up in a nesting loop). I remember hitting this somewhat
-- unexpected feature before.
local scale = data.scale
local xoffset = data.xoffset
local yoffset = data.yoffset
if scale then
sx = scale * sx
sy = scale * sy
end
-- -- example of usage needed (nested vf)
if csx then
sx = sx * csx
csx = 1
end
if csy then
sy = sy * csy
csy = 1
end
if xoffset and xoffset ~= 0 then
if factor ~= 0 then
xoffset = xoffset + xoffset * factor / refactored -- expansion
end
pos_h = pos_h + xoffset * sx
end
if yoffset and yoffset ~= 0 then
pos_v = pos_v + yoffset * sy
end
-- we assume resolved fonts: id mandate but maybe also size
local function flushchar(fnt,chr,csx,csy) -- can't be moved out of the function due to binding locals
if fnt then -- to the function variables etc etc ... kind of messy
local nest = char ~= chr or font ~= fnt
if fnt == 0 then
fnt = main
end
if csx then
csx = csx * sx
else
csx = sx
end
if csy then
csy = csy * sy
else
csy = sy
end
-- here no current!
return flush_character(false,fnt,chr,factor,nest,pos_h,pos_v,pos_r,csx,csy)
else
return 0
end
end
local refactored = 1000000
for i=1,#vfcommands do
local packet = vfcommands[i]
local command = packet[1]
if command == "char" then
local chr = packet[2]
local csx = packet[3]
local csy = packet[4] or csx
pos_h = pos_h + flushchar(fnt,chr,csx,csy)
elseif command == "slot" then
local index = packet[2]
local chr = packet[3]
local csx = packet[4]
local csy = packet[5] or csx
if index == 0 then
pos_h = pos_h + flushchar(font,chr,csx,csy)
else
local okay = fonts and fonts[index]
if okay then
local fnt = okay.id
if fnt then
pos_h = pos_h + flushchar(fnt,chr,csx,csy)
end
else
-- safeguard, we assume the font itself (often index 1)
pos_h = pos_h + flushchar(font,chr,csx,csy)
end
end
elseif command == "use" then
local index = packet[2]
if index then
local fnt
if index == 0 then
fnt = font
else
local okay = fonts and fonts[index]
if okay then
fnt = okay.id
end
end
if fnt then
-- not efficient but ok for now as experiment
local d = characters[fnt]
if d then
for i=3,#packet do
local chr = packet[i]
local dat = d[chr]
if dat then
flushfontchar(fnt,chr,dat)
end
end
end
end
end
elseif command == "right" then
local h = packet[2] -- already scaled
if h ~= 0 then
if factor ~= 0 then
h = h + h * factor / refactored -- expansion
end
pos_h = pos_h + h * sx
end
elseif command == "left" then
local h = packet[2] -- already scaled
if h ~= 0 then
if factor ~= 0 then
h = h + h * factor / refactored -- expansion
end
pos_h = pos_h - h * sx
end
elseif command == "down" then
local v = packet[2] -- already scaled
if v and v ~= 0 then
pos_v = pos_v - v * sy
end
elseif command == "up" then
local v = packet[2] -- already scaled
if v and v ~= 0 then
pos_v = pos_v + v * sy
end
elseif command == "offset" then
local c = packet[4]
if c then
local ph = pos_h
local pv = pos_v
local csx = packet[5]
local csy = packet[6] or csx
local h = packet[2]
local v = packet[3]
if h and h ~= 0 then
if factor ~= 0 then
h = h + h * factor / refactored -- expansion
end
pos_h = pos_h + h * sx
end
if v and v ~= 0 then
pos_v = pos_v + v * sy
end
flushchar(fnt,c,csx,csy)
pos_h = ph
pos_v = pv
end
elseif command == "compose" then -- for now idem
local ph = pos_h
local pv = pos_v
local h = packet[2] or 0
local v = packet[3] or 0
local c = packet[4]
if h ~= 0 then
if factor ~= 0 then
h = h + h * factor / refactored -- expansion
end
pos_h = pos_h + h * sx
end
if v and v ~= 0 then
pos_v = pos_v + v * sy
end
if c then
flushchar(fnt,c)
pos_h = ph
pos_v = pv
end
elseif command == "push" then
level = level + 1
local s = stack[level]
s[1] = pos_h
s[2] = pos_v
elseif command == "pop" then
if level > 0 then
local s = stack[level]
pos_h = s[1]
pos_v = s[2]
level = level - 1
end
elseif command == "frame" then
-- d:width d:height d:depth d:rulethickness b:outline b:advance b:baseline s:color
local width = packet[2]
local height = packet[3]
local depth = packet[4]
local wd, ht, dp
if width == true or height == true or depth == true then
wd, ht, dp = getwhd(current,true)
end
if width == true then
width = wd
elseif not width then
width = 0
end
if height == true then
height = ht
elseif not height then
height = 0
end
if depth == true then
depth = dp
elseif not depth then
depth = 0
end
local total = height + depth
if width > 0 and total > 0 then
if factor ~= 0 then
width = width + width * factor / refactored
end
if width > 0 then
local line = packet[5] or default
local outline = packet[6]
local advance = packet[7]
if outline == nil then
outline = true
end
if advance == nil then
advance = true
end
local baseline = outline and packet[8]
local color = packet[9] -- no longer needed probably
if color then
vfinjectors.startcolor(pos_h,pos_v,color) -- takes packet or string
end
width = width * sx
height = height * sy
depth = depth * sy
flushspecialrule(pos_h,pos_v,pos_r,width,height,depth,line,outline,baseline)
if color then
vfinjectors.stopcolor()
end
if advance then
pos_h = pos_h + width
end
end
end
elseif command == "rule" then
local size_v = packet[2]
local size_h = packet[3]
if size_h > 0 and size_v > 0 then
if factor ~= 0 then
size_h = size_h + size_h * factor / refactored
end
if size_h > 0 then
size_h = size_h * sx
size_v = size_v * sy
flushsimplerule(pos_h,pos_v,pos_r,size_h,size_v)
pos_h = pos_h + size_h
end
end
elseif command == "line" then
local wd = packet[2] or 0
local ht = packet[3] or 0
local dp = packet[4] or 0
if wd > 0 and ht ~= 0 and dp ~= 0 then
if factor ~= 0 then
wd = wd + wd * factor / refactored
end
if wd > 0 then
wd = wd * sx
ht = ht * sy
dp = dp * sy
local color = packet[5] -- no longer needed probably
if color then
vfinjectors.startcolor(pos_h,pos_v,color) -- takes packet or string
end
flushsimplerule(pos_h,pos_v-dp,pos_r,wd,ht+dp)
if color then
vfinjectors.stopcolor()
end
pos_h = pos_h + wd
end
end
elseif command == "font" then
local index = packet[2]
local okay = fonts and fonts[index]
if okay then
fnt = okay.id or fnt -- or maybe just return
end
elseif command == "lua" then
local code = packet[2]
local kind = type(code)
if kind ~= "function" then
code = loadstring(code)
kind = type(code)
end
if kind == "function" then
code(font,char,pos_h,pos_v,sx,sy) -- maybe also packet
end
elseif command == "node" then
local h = packet[2]
hlist_out(h,getlist(h))
-- elseif command == "pdf" then
-- unsupported
-- elseif command == "pdfmode" then
-- unsupported
-- elseif command == "special" then
-- unsupported
-- elseif command == "nop" then
-- just ignored
-- elseif command == "image" then
-- unsupported, use "node"
else
local injector = vfinjectors[command]
if injector then
injector(pos_h,pos_v,packet) -- maybe also sx, sy but then we need to check usage
end
end
end
-- hm, never seen outside here
pos_h = saved_h
pos_v = saved_v
pos_r = saved_r
nesting = nesting - 1
end
local onetimemessage -- could be defined later (todo: make plug for this)
flush_character = function(current,font,char,factor,vfcommands,pos_h,pos_v,pos_r,csx,csy)
if font ~= lastfont then
lastfont = font
fontcharacters = characters[font]
updatefontstate(font) -- can move to lpdf-lmt, cleaner
end
local data = fontcharacters[char]
if not data then
if char > 0 then
if not onetimemessage then
onetimemessage = fonts.loggers.onetimemessage
end
onetimemessage(font,char,"missing")
end
return 0, 0, 0
end
if vfcommands then
vfcommands = data.commands
end
local width, height, depth, naturalwidth, sx, sy
if current then
-- height and depth not needed
if true then
width, height, depth, factor, sx, sy = getglyphdimensions(current)
else
naturalwidth, height, depth, factor = getwhd(current,true) -- also get corrected width
sx, sy = getxyscales(current)
if factor == 0 then
width = naturalwidth
else
-- width = (1.0 + factor/1000000.0) * naturalwidth
width = naturalwidth + naturalwidth * factor/1000000.0
-- width = naturalwidth + naturalwidth * 0.000001 * factor
end
end
else
width = data.width or 0
height = data.height or 0
depth = data.depth or 0
naturalwidth = width
if not factor then
factor = 0
end
sx = 1
sy = 1
end
if pos_r == righttoleft_code then
pos_h = pos_h - width -- here ?
end
if vfcommands then
flush_vf_packet(current,pos_h,pos_v,pos_r,font,char,data,csx,csy,factor,sx,sy,vfcommands)
else
local orientation = data.orientation -- 0 (none), 1, 2, 3 or 4 (none)
if orientation and (orientation == 1 or orientation == 3) then
-- we can get weird charactersbox tracing here
pushorientation(orientation,pos_h,pos_v)
flushcharacter(current,pos_h,pos_v,pos_r,font,char,data,csx,csy,factor,sx,sy)
poporientation(orientation,pos_h,pos_v)
else
flushcharacter(current,pos_h,pos_v,pos_r,font,char,data,csx,csy,factor,sx,sy)
end
end
return width, height, depth
end
end
-- end of characters
local function reset_state()
pos_h = 0
pos_v = 0
pos_r = lefttoright_code
shipbox_h = 0
shipbox_v = 0
shippingmode = "none"
page_size_h = 0
page_size_v = 0
end
-- local function dirstackentry(t,k)
-- local v = {
-- cur_h = 0,
-- cur_v = 0,
-- ref_h = 0,
-- ref_v = 0,
-- }
-- t[k] = v
-- return v
-- end
--
-- local dirstack = setmetatableindex(dirstackentry)
--
-- local function reset_dir_stack()
-- dirstack = setmetatableindex(dirstackentry)
-- end
local dirstack = { }
local function reset_dir_stack()
dirstack = { }
end
local hlist_out, vlist_out do
local function applyanchor(orientation,x,y,width,height,depth,woffset,hoffset,doffset,xoffset,yoffset)
local ot = (orientation>> 0) & 0x0F
local ay = (orientation>> 4) & 0x0F
local ax = (orientation>> 8) & 0x0F
local of = (orientation>>12) & 0x0F
if ot == 4 then
ot, ay = 0, 1
elseif ot == 5 then
ot, ay = 0, 2
end
if ot == 0 or ot == 2 then
if ax == 1 then x = x - width
elseif ax == 2 then x = x + width
elseif ax == 3 then x = x - width/2
elseif ax == 4 then x = x + width/2
end
if ot == 2 then
doffset, hoffset = hoffset, doffset
end
if ay == 1 then y = y - doffset
elseif ay == 2 then y = y + hoffset
elseif ay == 3 then y = y + (doffset + hoffset)/2 - doffset
end
elseif ot == 1 or ot == 3 then
if ay == 1 then y = y - height
elseif ay == 2 then y = y + height
elseif ay == 3 then y = y - height/2
end
if ot == 1 then
doffset, hoffset = hoffset, doffset
end
if ax == 1 then x = x - width
elseif ax == 2 then x = x + width
elseif ax == 3 then x = x - width/2
elseif ax == 4 then x = x + width/2
elseif ax == 5 then x = x - hoffset
elseif ax == 6 then x = x + doffset
end
end
return ot, x + xoffset, y - yoffset
end
drivers.applyanchor = applyanchor
-- to be checked: begin- or enddir kan nil zijn, weird
-- check frequencies of nodes
local eps <const> = 10
hlist_out = function(this_box,current)
local ref_h = pos_h
local ref_v = pos_v
local ref_r = pos_r
pos_r = getdirection(this_box)
local boxwidth,
boxheight,
boxdepth = getwhd(this_box)
local cur_h = 0
-- local cur_v = 0
-- if not current then
-- current = getlist(this_box)
-- end
-- we can encounter par, boundary and penalty nodes but a special
-- iterator over content nodes won't save much
for current, id, subtype in nextnode, current do
if id == glyph_code then
local char, font = isglyph(current)
local x_offset, y_offset, left, right, raise = getoffsets(current)
if x_offset ~= 0 or y_offset ~= 0 then
if pos_r == righttoleft_code then
pos_h = ref_h - (cur_h + x_offset)
else
pos_h = ref_h + (cur_h + x_offset)
end
-- pos_v = ref_v - (cur_v - y_offset)
pos_v = ref_v + y_offset
-- synced
end
pos_v = pos_v + raise
pos_h = pos_h - left
local wd = flush_character(current,font,char,false,true,pos_h,pos_v,pos_r)
-- cur_h = cur_h + wd - right -- hm, no left here?
cur_h = cur_h + wd -- see new tabulate alignment code
elseif id == glue_code then
local gluewidth = effectiveglue(current,this_box)
if gluewidth ~= 0 then
if subtype >= leaders_code then
local leader = getleader(current)
if leader then
local id = getid(leader)
if id == rule_code then
if gluewidth > 0 then
local width, height, depth = getwhd(leader)
if height == runningrule then
height = boxheight
end
if depth == runningrule then
depth = boxdepth
end
local total = height + depth
if total > 0 then
if pos_r == righttoleft_code then
pos_h = pos_h - gluewidth
end
pos_v = pos_v - depth
flushrule(leader,pos_h,pos_v,pos_r,gluewidth,total,getsubtype(leader))
end
cur_h = cur_h + gluewidth
end
elseif (id == hlist_code or id == vlist_code or id == glyph_code) and gluewidth > 0 then
local width, height, depth = getwhd(leader)
-- no need for //
if width > 0 then
gluewidth = gluewidth + eps
local edge = cur_h + gluewidth
local lx = 0
if subtype == gleaders_code then
local save_h = cur_h
if pos_r == righttoleft_code then
cur_h = ref_h - shipbox_h + cur_h
-- cur_h = width * (cur_h // width)
cur_h = width * (cur_h / width)
cur_h = ref_h - shipbox_h - cur_h
else
cur_h = ref_h - shipbox_h - cur_h
-- cur_h = width * (cur_h // width)
cur_h = width * (cur_h / width)
cur_h = ref_h - shipbox_h - cur_h
end
if cur_h < save_h then
cur_h = cur_h + width
end
elseif subtype == leaders_code then
local save_h = cur_h
-- cur_h = width * (cur_h // width)
cur_h = width * (cur_h / width)
if cur_h < save_h then
cur_h = cur_h + width
end
else
lq = gluewidth / width
lr = gluewidth % width
if subtype == cleaders_code then
-- cur_h = cur_h + lr // 2
cur_h = cur_h + lr / 2
else
-- lx = lr // (lq + 1)
lx = lr / (lq + 1)
-- cur_h = cur_h + (lr - (lq - 1) * lx) // 2
cur_h = cur_h + (lr - (lq - 1) * lx) / 2
end
end
if id == glyph_code then
local char, font = isglyph(leader)
local x_offset, y_offset, left, right, raise = getoffsets(leader)
local h = ref_h
local v = ref_v
if x_offset ~= 0 or y_offset ~= 0 then
if pos_r == righttoleft_code then
h = h - x_offset
else
h = h + x_offset
end
v = v + y_offset
end
v = v + raise
h = h - left
local basepoint_h = 0
if boxdir ~= pos_r then
basepoint_h = boxwidth
end
if pos_r == righttoleft_code then
pos_h = h - basepoint_h
else
pos_h = h + basepoint_h
end
while cur_h + width <= edge do
if pos_r == righttoleft_code then
pos_h = h - cur_h
else
pos_h = h + cur_h
end
pos_v = v
flush_character(leader,font,char,false,true,pos_h,pos_v,pos_r)
cur_h = cur_h + width + lx
end
else
local shift = isglyph and 0 or getshift(leader)
local boxdir = getdirection(leader) or lefttoright_code
pushleaderlevel()
while cur_h + width <= edge do
-- todo: move some out of loop as above
local basepoint_h = 0
-- local basepoint_v = shift
if boxdir ~= pos_r then
basepoint_h = boxwidth
end
-- synch_pos_with_cur(ref_h,ref_v,cur_h + basepoint_h,shift)
if pos_r == righttoleft_code then
pos_h = ref_h - (cur_h + basepoint_h)
else
pos_h = ref_h + (cur_h + basepoint_h)
end
pos_v = ref_v - shift
-- synced
if id == vlist_code then
vlist_out(leader,getlist(leader))
else
hlist_out(leader,getlist(leader))
end
cur_h = cur_h + width + lx
end
popleaderlevel()
end
cur_h = edge - eps
else
cur_h = cur_h + gluewidth
end
else
-- maybe some day also glyphs
cur_h = cur_h + gluewidth
end
else
cur_h = cur_h + gluewidth
end
else
if tospace and subtype == spaceskip_code then
-- kind of tricky because because we can have a different sx sy
flush_character(false,getfont(current),32,false,true,pos_h,pos_v,pos_r) -- we need to pass current for scale?
end
cur_h = cur_h + gluewidth
end
end
elseif id == hlist_code or id == vlist_code then
local width, height, depth = getwhd(current)
local list = getlist(current)
if list then
local boxdir = getdirection(current) or lefttoright_code
local shift, orientation = getshift(current)
if not orientation then
local basepoint_h = boxdir ~= pos_r and width or 0
-- local basepoint_v = shift
if pos_r == righttoleft_code then
pos_h = ref_h - (cur_h + basepoint_h)
else
pos_h = ref_h + (cur_h + basepoint_h)
end
pos_v = ref_v - shift
-- synced
if id == vlist_code then
vlist_out(current,list)
else
hlist_out(current,list)
end
elseif orientation == 0x1000 then
local orientation, xoffset, yoffset = getorientation(current)
local basepoint_h = boxdir ~= pos_r and width or 0
-- local basepoint_v = shift
if pos_r == righttoleft_code then
pos_h = ref_h - (cur_h + basepoint_h + xoffset)
else
pos_h = ref_h + (cur_h + basepoint_h + xoffset)
end
pos_v = ref_v - (shift - yoffset)
-- pushorientation(orientation,pos_h,pos_v,pos_r)
-- synced
if id == vlist_code then
vlist_out(current,list)
else
hlist_out(current,list)
end
-- poporientation(orientation,pos_h,pos_v,pos_r)
else
local orientation, xoffset, yoffset, woffset, hoffset, doffset = getorientation(current)
local orientation, basepoint_h, basepoint_v = applyanchor(orientation,0,shift,width,height,depth,woffset,hoffset,doffset,xoffset,yoffset)
if orientation == 1 then
basepoint_h = basepoint_h + doffset
if boxdir == pos_r then
basepoint_v = basepoint_v - height
end
elseif orientation == 2 then
if boxdir == pos_r then
basepoint_h = basepoint_h + width
end
elseif orientation == 3 then
basepoint_h = basepoint_h + hoffset
if boxdir ~= pos_r then
basepoint_v = basepoint_v - height
end
end
if pos_r == righttoleft_code then
pos_h = ref_h - (cur_h + basepoint_h)
else
pos_h = ref_h + (cur_h + basepoint_h)
end
-- pos_v = ref_v - (cur_v + basepoint_v)
pos_v = ref_v - basepoint_v
-- synced
pushorientation(orientation,pos_h,pos_v,pos_r)
if id == vlist_code then
vlist_out(current,list)
else
hlist_out(current,list)
end
poporientation(orientation,pos_h,pos_v,pos_r)
end
end
cur_h = cur_h + width
elseif id == kern_code then
-- when we use getkerndimension we get rounded values
if true then
local kern = getkerndimension(current)
if kern ~= 0 then
cur_h = cur_h + kern
end
else
local kern, factor = getkern(current,true)
if kern ~= 0 then
if factor ~= 0 then
cur_h = cur_h + (1.0 + factor/1000000.0) * kern
else
cur_h = cur_h + kern
end
end
end
elseif id == rule_code then
local width, height, depth = getwhd(current)
if width > 0 then
if height == runningrule then
height = boxheight
end
if depth == runningrule then
depth = boxdepth
end
local total = height + depth
if total > 0 then
local xoffset, yoffset, left, right = getoffsets(current) -- top bottom
if left ~= 0 then
pos_v = pos_v + left
total = total - left
end
if right ~= 0 then
depth = depth - right
total = total - right
end
if pos_r == righttoleft_code then
pos_h = pos_h - width
xoffset = - xoffset
end
pos_v = pos_v - depth
flushrule(current,pos_h + xoffset,pos_v + yoffset,pos_r,width,total,subtype)
end
end
-- move into above if
cur_h = cur_h + width
elseif id == math_code then
-- local kern = getkern(current)
-- if kern ~= 0 then
-- cur_h = cur_h + kern
-- else
cur_h = cur_h + effectiveglue(current,this_box)
-- end
elseif id == dir_code then
-- We normally have proper begin-end pairs. A begin without end is (silently) handled
-- and an end without a begin will be (silently) skipped we only need to move forward
-- so we then have a faster calculation.
local dir, cancel = getdirection(current)
if cancel then
local ds = dirstack[current]
if ds then
ref_h = ds.ref_h
ref_v = ds.ref_v
cur_h = ds.cur_h
-- cur_v = ds.cur_v
else
-- pardir
end
pos_r = dir
else
local width, enddir = dirdimensions(this_box,current)
local new_h = cur_h + width
if dir ~= pos_r then
cur_h = new_h
end
if enddir ~= current then
dirstack[enddir] = {
cur_h = new_h,
-- cur_v = cur_v,
ref_h = ref_h,
ref_v = ref_v,
}
setdirection(enddir,pos_r)
end
if pos_r == righttoleft_code then
pos_h = ref_h - cur_h
else
pos_h = ref_h + cur_h
end
-- pos_v = ref_v - cur_v
pos_v = ref_v
-- synced
ref_h = pos_h
ref_v = pos_v
cur_h = 0
-- cur_v = 0
pos_r = dir
goto synced
end
elseif id == whatsit_code then
flushwhatsit[subtype](current,pos_h,pos_v)
elseif id == disc_code then
local replace, tail = getreplace(current)
-- actually, we no longer have these select discs in the packaged list ... it's about
-- time to clean up the disc code a bit further
if replace then -- and subtype ~= select_disc_code then
setlink(tail,getnext(current))
setlink(current,replace)
setreplace(current)
end
-- elseif id == par_code and startofpar(current) then
-- local pardir = getdirection(current) or lefttoright_code
-- if pardir == righttoleft_code then
-- end
-- end
else
-- penalty, boundary ... no dimensions
goto synced
end
-- There is no gain in skipping over this when we have zero progression
-- and such.
if pos_r == righttoleft_code then
pos_h = ref_h - cur_h
else
pos_h = ref_h + cur_h
end
-- pos_v = ref_v - cur_v
pos_v = ref_v
::synced::
end
pos_h = ref_h
pos_v = ref_v
pos_r = ref_r
end
vlist_out = function(this_box,current)
local ref_h = pos_h
local ref_v = pos_v
local ref_r = pos_r
pos_r = getdirection(this_box)
local boxwidth,
boxheight,
boxdepth = getwhd(this_box)
local cur_h = 0 -- needs checking .. needed ?
local cur_v = - boxheight
local top_edge = cur_v
-- if pos_r == righttoleft_code then
-- pos_h = ref_h - cur_h
-- else
-- pos_h = ref_h + cur_h
-- end
pos_h = ref_h
pos_v = ref_v - cur_v
-- synced
-- if not current then
-- current = getlist(this_box)
-- end
-- while current do
-- local id = getid(current)
for current, id, subtype in nextnode, current do
if id == glue_code then
local glueheight = effectiveglue(current,this_box)
if glueheight ~= 0 then
if subtype >= leaders_code then
local leader = getleader(current)
if leader then
local width, height, depth = getwhd(leader)
local total = height + depth
if getid(leader) == rule_code then
depth = 0 -- hm
total = glueheight -- forgotten ... needs testing
if total > 0 then
if width == runningrule then
width = boxwidth
end
if width > 0 then
if pos_r == righttoleft_code then
cur_h = cur_h - width
end
flushrule(leader,pos_h,pos_v - total,pos_r,width,total,getsubtype(leader))
end
cur_v = cur_v + total
end
elseif total > 0 and glueheight > 0 then
glueheight = glueheight + 10
local edge = cur_v + glueheight
local ly = 0
if subtype == gleaders_code then
save_v = cur_v
cur_v = ref_v - shipbox_v - cur_v
cur_v = total * (cur_v // total)
cur_v = ref_v - shipbox_v - cur_v
if cur_v < save_v then
cur_v = cur_v + total
end
elseif subtype == leaders_code then -- aleader
save_v = cur_v
cur_v = top_edge + total * ((cur_v - top_edge) // total)
if cur_v < save_v then
cur_v = cur_v + total
end
else
lq = glueheight / total
lr = glueheight % total
if subtype == cleaders_code then
cur_v = cur_v + lr // 2
else
ly = lr // (lq + 1)
cur_v = cur_v + (lr - (lq - 1) * ly) // 2
end
end
local shift = getshift(leader)
pushleaderlevel()
while cur_v + total <= edge do -- todo: <= edge - total
-- synch_pos_with_cur(ref_h, ref_v, getshift(leader), cur_v + height)
if pos_r == righttoleft_code then
pos_h = ref_h - shift
else
pos_h = ref_h + shift
end
pos_v = ref_v - (cur_v + height)
-- synced
if getid(leader) == vlist_code then
vlist_out(leader,getlist(leader))
else
hlist_out(leader,getlist(leader))
end
cur_v = cur_v + total + ly
end
popleaderlevel()
cur_v = edge - 10
else
cur_v = cur_v + glueheight
end
end
else
cur_v = cur_v + glueheight
end
end
elseif id == hlist_code or id == vlist_code then
local width, height, depth = getwhd(current)
local list = getlist(current)
if list then
local boxdir = getdirection(current) or lefttoright_code
local shift, orientation = getshift(current)
if not orientation then
-- local basepoint_h = shift
-- local basepoint_v = height
if boxdir ~= pos_r then
shift = shift + width
end
if pos_r == righttoleft_code then
pos_h = ref_h - shift
else
pos_h = ref_h + shift
end
pos_v = ref_v - (cur_v + height)
-- synced
if id == vlist_code then
vlist_out(current,list)
else
hlist_out(current,list)
end
elseif orientation == 0x1000 then
local orientation, xoffset, yoffset = getorientation(current)
-- local basepoint_h = shift
-- local basepoint_v = height
if boxdir ~= pos_r then
shift = shift + width
end
if pos_r == righttoleft_code then
pos_h = ref_h - (shift + xoffset)
else
pos_h = ref_h + (shift + xoffset)
end
pos_v = ref_v - (cur_v + height - yoffset)
-- synced
if id == vlist_code then
vlist_out(current,list)
else
hlist_out(current,list)
end
else
local orientation, xoffset, yoffset, woffset, hoffset, doffset = getorientation(current)
local orientation, basepoint_h, basepoint_v = applyanchor(orientation,shift,height,width,height,depth,woffset,hoffset,doffset,xoffset,yoffset)
if orientation == 1 then
basepoint_h = basepoint_h + width - height
basepoint_v = basepoint_v - height
elseif orientation == 2 then
basepoint_h = basepoint_h + width
basepoint_v = basepoint_v + depth - height
elseif orientation == 3 then -- weird
basepoint_h = basepoint_h + height
end
if pos_r == righttoleft_code then
pos_h = ref_h - basepoint_h
else
pos_h = ref_h + basepoint_h
end
pos_v = ref_v - (cur_v + basepoint_v)
-- synced
pushorientation(orientation,pos_h,pos_v,pos_r)
if id == vlist_code then
vlist_out(current,list)
else
hlist_out(current,list)
end
poporientation(orientation,pos_h,pos_v,pos_r)
end
end
cur_v = cur_v + height + depth
elseif id == kern_code then
cur_v = cur_v + getkern(current)
elseif id == rule_code then
local width, height, depth = getwhd(current)
local total = height + depth
if total > 0 then
if width == runningrule then
width = boxwidth
end
if width > 0 then
local xoffset, yoffset, left, right = getoffsets(current)
if left ~= 0 then
width = width - left
xoffset = left
end
if right ~= 0 then
width = width - right
end
if pos_r == righttoleft_code then
xoffset = - xoffset - width
end
flushrule(current,pos_h + xoffset,pos_v - total - yoffset,pos_r,width,total,subtype)
end
end
cur_v = cur_v + total
elseif id == whatsit_code then
flushwhatsit[subtype](current,pos_h,pos_v)
else
-- penalty
goto synced
end
if pos_r == righttoleft_code then
pos_h = ref_h - cur_h
else
pos_h = ref_h + cur_h
end
pos_v = ref_v - cur_v
::synced::
end
pos_h = ref_h
pos_v = ref_v
pos_r = ref_r
end
end
function drivers.converters.lmtx(driver,box,smode,objnum,specification)
if not driver then
report("error in converter, no driver")
return
end
if box then
box = tonut(box)
else
report("error in converter, no box")
return
end
local actions = driver.actions
local flushers = driver.flushers
initialize = actions.initialize
finalize = actions.finalize
updatefontstate = flushers.updatefontstate
pushorientation = flushers.pushorientation
poporientation = flushers.poporientation
pushleaderlevel = flushers.pushleaderlevel
popleaderlevel = flushers.popleaderlevel
flushcharacter = flushers.character
flushfontchar = flushers.fontchar
flushrule = flushers.rule
flushsimplerule = flushers.simplerule
flushspecialrule = flushers.specialrule
flushliteral = flushers.literal
flushwhatsit = flushers.whatsit
reset_dir_stack()
reset_state()
shippingmode = smode
local details = nil -- must be outside labels
local width, height, depth = getwhd(box)
local total = height + depth
if height > maxdimen or depth > maxdimen or width > maxdimen or total > maxdimen then
goto DONE
end
if shippingmode == "page" then
-- We have zero offsets in ConTeXt.
local pagewidth, pageheight = getpagedimensions()
pos_r = lefttoright_code
if pagewidth > 0 then
page_size_h = pagewidth
else
page_size_h = width
end
if page_size_h == 0 then
page_size_h = width
end
if pageheight > 0 then
page_size_v = pageheight
else
page_size_v = total
end
if page_size_v == 0 then
page_size_v = total
end
local refpoint_h = 0
local refpoint_v = page_size_v
pos_h = refpoint_h
pos_v = refpoint_v - height
else
page_size_h = width
page_size_v = total
pos_r = getdirection(box)
pos_v = depth
pos_h = pos_r == righttoleft_code and width or 0
end
shipbox_ref_h = pos_h
shipbox_ref_v = pos_v
details = {
shippingmode = smode, -- target
boundingbox = { 0, 0, page_size_h, page_size_v },
objectnumber = smode ~= "page" and objnum or nil,
pagenumber = smode == "page" and objnum or nil,
specification = specification,
}
initialize(driver,details)
lastfont = nil -- this forces a sync each page / object
if getid(box) == vlist_code then
vlist_out(box,getlist(box))
else
hlist_out(box,getlist(box))
end
::DONE::
finalize(driver,details)
shippingmode = "none"
end
-- This will move to back-out.lua eventually.
do
----- sortedhash = table.sortedhash
----- tonut = nodes.tonut
local properties = nodes.properties.data
local flush = texio.write
local flushline = texio.writenl
local periods = utilities.strings.newrepeater(".")
local f_detail_0 = formatters["%s %s = %s"]
local f_detail_1 = formatters["%i: %s %s = %s"]
local f_detail_2 = formatters["%i:%i: %s %s = %s"]
local function showdetails(n,l,tlp,l1,l2)
local p = properties[tonut(n)]
if p then
for k, v in sortedhash(p) do
local t = type(v)
local p = periods[l+1]
if t == "string" then
if find(v,"[\n\r]") then
v = "\n" .. stripstring(v) .. "\n"
end
elseif t == "number" or t == "boolean" then
v = tostring(v)
elseif t == "table" then
v = sequenced(v)
else
v = "<" .. tostring(v) .. ">"
end
if tlp == 3 then
flushline(f_detail_2(l1,l2,p,k,v))
elseif tlp == 2 then
flushline(f_detail_1(l2,p,k,v))
elseif tlp == 1 then
flushline(f_detail_1(l1,p,k,v))
else
flushline(f_detail_0(p,k,v))
end
end
end
end
local whatsittracers = {
latelua = showdetails,
literal = showdetails,
}
callback.register("show_whatsit",function(n,what,l,tlp,l1,l2)
local s = nodes.whatsitcodes[n.subtype]
if what == 1 then
return s or "unknown"
-- elseif what == 2 then
else
local w = whatsittracers[s]
if w then
w(n,l,tlp,l1,l2)
end
end
end)
local names = attributes.names
callback.register("get_attribute",function(k,v)
return attributes.names[k], nil -- we show the name and number
end)
end
-- local function calculate_width_to_enddir(this_box,begindir) -- can be a helper
-- local dir_nest = 1
-- local enddir = begindir
-- for current, subtype in nextdir, getnext(begindir) do
-- if subtype == normaldir_code then -- todo
-- dir_nest = dir_nest + 1
-- else
-- dir_nest = dir_nest - 1
-- end
-- if dir_nest == 0 then -- does the type matter
-- enddir = current
-- local width = rangedimensions(this_box,begindir,enddir)
-- return enddir, width
-- end
-- end
-- if enddir == begindir then
-- local width = rangedimensions(this_box,begindir) -- ,enddir)
-- return enddir, width
-- end
-- return enddir, 0
-- end
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