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|
if not modules then modules = { } end modules ['anch-pos'] = {
version = 1.001,
comment = "companion to anch-pos.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
--[[ldx--
<p>We save positional information in the main utility table. Not only
can we store much more information in <l n='lua'/> but it's also
more efficient.</p>
--ldx]]--
-- plus (extra) is obsolete but we will keep it for a while
-- maybe replace texsp by our own converter (stay at the lua end)
-- eventually mp will have large numbers so we can use sp there too
local tostring, next, rawget, setmetatable = tostring, next, rawget, setmetatable
local concat, sort = table.concat, table.sort
local format, gmatch, match = string.format, string.gmatch, string.match
local rawget = rawget
local lpegmatch = lpeg.match
local insert, remove = table.insert, table.remove
local allocate, mark = utilities.storage.allocate, utilities.storage.mark
local texsp, texcount, texbox, texdimen, texsetcount = tex.sp, tex.count, tex.box, tex.dimen, tex.setcount
----- texsp = string.todimen -- because we cache this is much faster but no rounding
local setmetatableindex = table.setmetatableindex
local variables = interfaces.variables
local v_text = variables.text
local v_column = variables.column
local new_latelua = nodes.pool.latelua
local find_tail = node.slide
local pt = number.dimenfactors.pt
local pts = number.pts
local collected = allocate()
local tobesaved = allocate()
local jobpositions = {
collected = collected,
tobesaved = tobesaved,
}
job.positions = jobpositions
_plib_ = jobpositions
local default = { -- not r and paragraphs etc
__index = {
x = 0, -- x position baseline
y = 0, -- y position baseline
w = 0, -- width
h = 0, -- height
d = 0, -- depth
p = 0, -- page
n = 0, -- paragraph
ls = 0, -- leftskip
rs = 0, -- rightskip
hi = 0, -- hangindent
ha = 0, -- hangafter
hs = 0, -- hsize
pi = 0, -- parindent
ps = false, -- parshape
}
}
local function sorter(a,b)
return a.y > b.y
end
local function initializer()
tobesaved = jobpositions.tobesaved
collected = jobpositions.collected
-- enhance regions with paragraphs
for tag, data in next, collected do
local region = data.r
if region then
local r = collected[region]
if r then
local paragraphs = r.paragraphs
if not paragraphs then
r.paragraphs = { data }
else
paragraphs[#paragraphs+1] = data
end
end
end
setmetatable(data,default)
end
-- add metatable
-- for tag, data in next, collected do
-- setmetatable(data,default)
-- end
-- sort this data and add metatable
for tag, data in next, collected do
local region = data.r
if region then
local r = collected[region]
if r then
local paragraphs = r.paragraphs
if paragraphs and #paragraphs > 1 then
sort(paragraphs,sorter)
end
end
end
-- so, we can be sparse and don't need 'or 0' code
end
end
job.register('job.positions.collected', tobesaved, initializer)
local regions = { }
local nofregions = 0
local region = nil
local columns = { }
local nofcolumns = 0
local column = nil
local nofpages = nil
-- beware ... we're not sparse here as lua will reserve slots for the nilled
local function setdim(name,w,h,d,extra) -- will be used when we move to sp allover
local x = pdf.h
local y = pdf.v
if x == 0 then x = nil end
if y == 0 then y = nil end
if w == 0 then w = nil end
if h == 0 then h = nil end
if d == 0 then d = nil end
if extra == "" then extra = nil end
-- todo: sparse
tobesaved[name] = {
p = texcount.realpageno,
x = x,
y = y,
w = w,
h = h,
d = d,
e = extra,
r = region,
c = column,
}
end
local function setall(name,p,x,y,w,h,d,extra)
if x == 0 then x = nil end
if y == 0 then y = nil end
if w == 0 then w = nil end
if h == 0 then h = nil end
if d == 0 then d = nil end
if extra == "" then extra = nil end
-- todo: sparse
tobesaved[name] = {
p = p,
x = x,
y = y,
w = w,
h = h,
d = d,
e = extra,
r = region,
c = column,
}
end
local function enhance(data)
if not data then
return nil
end
if data.r == true then -- or ""
data.r = region
end
if data.x == true then
data.x = pdf.h
end
if data.y == true then
data.y = pdf.v
end
if data.p == true then
data.p = texcount.realpageno
end
if data.c == true then
data.c = column
end
if data.w == 0 then
data.w = nil
end
if data.h == 0 then
data.h = nil
end
if data.d == 0 then
data.d = nil
end
return data
end
local function set(name,index,val)
local data = enhance(val or index)
if val then
container = tobesaved[name]
if not container then
tobesaved[name] = {
[index] = data
}
else
container[index] = data
end
else
tobesaved[name] = data
end
end
local function get(id,index)
if index then
local container = collected[id]
return container and container[index]
else
return collected[id]
end
end
jobpositions.setdim = setdim
jobpositions.setall = setall
jobpositions.set = set
jobpositions.get = get
-- will become private table (could also become attribute driven but too nasty
-- as attributes can bleed e.g. in margin stuff)
function jobpositions.b_col(tag)
tobesaved[tag] = {
r = true,
x = pdf.h,
w = 0,
}
insert(columns,tag)
column = tag
end
function jobpositions.e_col(tag)
local t = tobesaved[column]
if not t then
-- something's wrong
else
t.w = pdf.h - t.x
t.r = region
end
remove(columns)
column = columns[#columns]
end
function commands.bcolumn(tag,register)
insert(columns,tag)
column = tag
if register then
context(new_latelua(format("_plib_.b_col(%q)",tag)))
end
end
function commands.ecolumn(register)
if register then
context(new_latelua("_plib_.e_col()"))
end
remove(columns)
column = columns[#columns]
end
-- regions
function jobpositions.b_region(tag)
local last = tobesaved[tag]
last.x = pdf.h
last.p = texcount.realpageno
insert(regions,tag)
region = tag
end
function jobpositions.e_region()
tobesaved[region].y = pdf.v
remove(regions)
region = regions[#regions]
end
function jobpositions.markregionbox(n,tag)
if not tag or tag == "" then
nofregions = nofregions + 1
tag = format("region:%s",nofregions)
end
local box = texbox[n]
local w = box.width
local h = box.height
local d = box.depth
tobesaved[tag] = {
p = true,
x = true,
y = true,
w = w ~= 0 and w or nil,
h = h ~= 0 and h or nil,
d = d ~= 0 and d or nil,
}
local push = new_latelua(format("_plib_.b_region(%q)",tag))
local pop = new_latelua("_plib_.e_region()")
-- maybe we should construct a hbox first (needs experimenting) so that we can avoid some at the tex end
local head = box.list
if head then
local tail = find_tail(head)
head.prev = push
push.next = head
pop .prev = tail
tail.next = pop
else -- we can have a simple push/pop
push.next = pop
pop.prev = push
end
box.list = push
end
function jobpositions.enhance(name)
enhance(tobesaved[name])
end
function commands.pos(name,t)
tobesaved[name] = t
context(new_latelua(format("_plib_.enhance(%q)",name)))
end
local nofparagraphs = 0
function commands.parpos() -- todo: relate to localpar (so this is an intermediate variant)
nofparagraphs = nofparagraphs + 1
texsetcount("global","parposcounter",nofparagraphs)
local strutbox = texbox.strutbox
local t = {
p = true,
c = true,
r = true,
x = true,
y = true,
h = strutbox.height,
d = strutbox.depth,
hs = tex.hsize,
}
local leftskip = tex.leftskip.width
local rightskip = tex.rightskip.width
local hangindent = tex.hangindent
local hangafter = tex.hangafter
local parindent = tex.parindent
local parshape = tex.parshape
if leftskip ~= 0 then
t.ls = leftskip
end
if rightskip ~= 0 then
t.rs = rightskip
end
if hangindent ~= 0 then
t.hi = hangindent
end
if hangafter ~= 1 and hangafter ~= 0 then -- can not be zero .. so it needs to be 1 if zero
t.ha = hangafter
end
if parindent ~= 0 then
t.pi = parindent
end
if parshape and #parshape > 0 then
t.ps = parshape
end
local tag = format("p:%s",nofparagraphs)
tobesaved[tag] = t
context(new_latelua(format("_plib_.enhance(%q)",tag)))
end
function commands.posxy(name) -- can node.write be used here?
tobesaved[name] = {
p = true,
c = column,
r = true,
x = true,
y = true,
n = nofparagraphs > 0 and nofparagraphs or nil,
}
context(new_latelua(format("_plib_.enhance(%q)",name)))
end
function commands.poswhd(name,w,h,d)
tobesaved[name] = {
p = true,
c = column,
r = true,
x = true,
y = true,
w = w,
h = h,
d = d,
n = nofparagraphs > 0 and nofparagraphs or nil,
}
context(new_latelua(format("_plib_.enhance(%q)",name)))
end
function commands.posplus(name,w,h,d,extra)
tobesaved[name] = {
p = true,
c = column,
r = true,
x = true,
y = true,
w = w,
h = h,
d = d,
n = nofparagraphs > 0 and nofparagraphs or nil,
e = extra,
}
context(new_latelua(format("_plib_.enhance(%q)",name)))
end
function commands.posstrut(name,w,h,d)
local strutbox = texbox.strutbox
tobesaved[name] = {
p = true,
c = column,
r = true,
x = true,
y = true,
h = strutbox.height,
d = strutbox.depth,
n = nofparagraphs > 0 and nofparagraphs or nil,
}
context(new_latelua(format("_plib_.enhance(%q)",name)))
end
function jobpositions.getreserved(tag,n)
if tag == v_column then
local fulltag = format("%s:%s:%s",tag,texcount.realpageno,n or 1)
local data = collected[fulltag]
if data then
return data, fulltag
end
tag = v_text
end
if tag == v_text then
local fulltag = format("%s:%s",tag,texcount.realpageno)
return collected[fulltag] or false, fulltag
end
return collected[tag] or false, tag
end
function jobpositions.copy(target,source)
collected[target] = collected[source]
end
function jobpositions.replace(id,p,x,y,w,h,d)
collected[id] = { p = p, x = x, y = y, w = w, h = h, d = d } -- c g
end
function jobpositions.page(id)
local jpi = collected[id]
return jpi and jpi.p
end
function jobpositions.region(id)
local jpi = collected[id]
return jpi and jpi.r or false
end
function jobpositions.column(id)
local jpi = collected[id]
return jpi and jpi.c or false
end
function jobpositions.paragraph(id)
local jpi = collected[id]
return jpi and jpi.n
end
jobpositions.p = jobpositions.page
jobpositions.r = jobpositions.region
jobpositions.c = jobpositions.column
jobpositions.n = jobpositions.paragraph
function jobpositions.x(id)
local jpi = collected[id]
return jpi and jpi.x
end
function jobpositions.y(id)
local jpi = collected[id]
return jpi and jpi.y
end
function jobpositions.width(id)
local jpi = collected[id]
return jpi and jpi.w
end
function jobpositions.height(id)
local jpi = collected[id]
return jpi and jpi.h
end
function jobpositions.depth(id)
local jpi = collected[id]
return jpi and jpi.d
end
function jobpositions.leftskip(id)
local jpi = collected[id]
return jpi and jpi.ls
end
function jobpositions.rightskip(id)
local jpi = collected[id]
return jpi and jpi.rs
end
function jobpositions.hsize(id)
local jpi = collected[id]
return jpi and jpi.hs
end
function jobpositions.parindent(id)
local jpi = collected[id]
return jpi and jpi.pi
end
function jobpositions.hangindent(id)
local jpi = collected[id]
return jpi and jpi.hi
end
function jobpositions.hangafter(id)
local jpi = collected[id]
return jpi and jpi.ha or 1
end
function jobpositions.xy(id)
local jpi = collected[id]
if jpi then
return jpi.x, jpi.y
else
return 0, 0
end
end
function jobpositions.lowerleft(id)
local jpi = collected[id]
if jpi then
return jpi.x, jpi.y - jpi.d
else
return 0, 0
end
end
function jobpositions.lowerright(id)
local jpi = collected[id]
if jpi then
return jpi.x + jpi.w, jpi.y - jpi.d
else
return 0, 0
end
end
function jobpositions.upperright(id)
local jpi = collected[id]
if jpi then
return jpi.x + jpi.w, jpi.y + jpi.h
else
return 0, 0
end
end
function jobpositions.upperleft(id)
local jpi = collected[id]
if jpi then
return jpi.x, jpi.y + jpi.h
else
return 0, 0
end
end
function jobpositions.position(id)
local jpi = collected[id]
if jpi then
return jpi.p, jpi.x, jpi.y, jpi.w, jpi.h, jpi.d
else
return 0, 0, 0, 0, 0, 0
end
end
function jobpositions.extra(id,n,default) -- assume numbers
local jpi = collected[id]
if jpi then
local e = jpi.e
if e then
local split = jpi.split
if not split then
split = lpegmatch(splitter,jpi.e)
jpi.split = split
end
return texsp(split[n]) or default -- watch the texsp here
end
end
return default
end
local function overlapping(one,two,overlappingmargin) -- hm, strings so this is wrong .. texsp
one = collected[one]
two = collected[two]
if one and two and one.p == two.p then
if not overlappingmargin then
overlappingmargin = 2
end
local x_one = one.x
local x_two = two.x
local w_two = two.w
local llx_one = x_one - overlappingmargin
local urx_two = x_two + w_two + overlappingmargin
if llx_one > urx_two then
return false
end
local w_one = one.w
local urx_one = x_one + w_one + overlappingmargin
local llx_two = x_two - overlappingmargin
if urx_one < llx_two then
return false
end
local y_one = one.y
local y_two = two.y
local d_one = one.d
local h_two = two.h
local lly_one = y_one - d_one - overlappingmargin
local ury_two = y_two + h_two + overlappingmargin
if lly_one > ury_two then
return false
end
local h_one = one.h
local d_two = two.d
local ury_one = y_one + h_one + overlappingmargin
local lly_two = y_two - d_two - overlappingmargin
if ury_one < lly_two then
return false
end
return true
end
end
local function onsamepage(list,page)
for id in gmatch(list,"(, )") do
local jpi = collected[id]
if jpi then
local p = jpi.p
if not p then
return false
elseif not page then
page = p
elseif page ~= p then
return false
end
end
end
return page
end
jobpositions.overlapping = overlapping
jobpositions.onsamepage = onsamepage
-- interface
commands.replacepospxywhd = jobpositions.replace
commands.copyposition = jobpositions.copy
function commands.MPp(id)
local jpi = collected[id]
if jpi then
local p = jpi.p
if p and p ~= true then
context(p)
return
end
end
context('0')
end
function commands.MPx(id)
local jpi = collected[id]
if jpi then
local x = jpi.x
if x and p ~= true then
context("%.5fpt",x*pt)
return
end
end
context('0pt')
end
function commands.MPy(id)
local jpi = collected[id]
if jpi then
local y = jpi.y
if y and p ~= true then
context("%.5fpt",y*pt)
return
end
end
context('0pt')
end
function commands.MPw(id)
local jpi = collected[id]
if jpi then
local w = jpi.w
if w then
context("%.5fpt",w*pt)
return
end
end
context('0pt')
end
function commands.MPh(id)
local jpi = collected[id]
if jpi then
local h = jpi.h
if h then
context("%.5fpt",h*pt)
return
end
end
context('0pt')
end
function commands.MPd(id)
if jpi then
local d = jpi.d
if d then
context("%spt",d*pt)
return
end
end
context('0pt')
end
function commands.MPxy(id)
local jpi = collected[id]
if jpi then
context('(%.5fpt,%.5fpt)',
jpi.x*pt,
jpi.y*pt
)
else
context('(0,0)')
end
end
function commands.MPll(id)
local jpi = collected[id]
if jpi then
context('(%.5fpt,%.5fpt)',
jpi.x *pt,
(jpi.y-jpi.d)*pt
)
else
context('(0,0)') -- for mp only
end
end
function commands.MPlr(id)
local jpi = collected[id]
if jpi then
context('(%.5fpt,%.5fpt)',
(jpi.x + jpi.w)*pt,
(jpi.y - jpi.d)*pt
)
else
context('(0,0)') -- for mp only
end
end
function commands.MPur(id)
local jpi = collected[id]
if jpi then
context('(%.5fpt,%.5fpt)',
(jpi.x + jpi.w)*pt,
(jpi.y + jpi.h)*pt
)
else
context('(0,0)') -- for mp only
end
end
function commands.MPul(id)
local jpi = collected[id]
if jpi then
context('(%.5fpt,%.5fpt)',
jpi.x *pt,
(jpi.y + jpi.h)*pt
)
else
context('(0,0)') -- for mp only
end
end
local function MPpos(id)
local jpi = collected[id]
if jpi then
local p = jpi.p
if p then
context("%s,%.5fpt,%.5fpt,%.5fpt,%.5fpt,%.5fpt",
p,
jpi.x*pt,
jpi.y*pt,
jpi.w*pt,
jpi.h*pt,
jpi.d*pt
)
return
end
end
context('0,0,0,0,0,0') -- for mp only
end
commands.MPpos = MPpos
function commands.MPn(id)
local jpi = collected[id]
if jpi then
local n = jpi.n
if n then
context(n)
return
end
end
context(0)
end
function commands.MPc(id)
local jpi = collected[id]
if jpi then
local c = jpi.c
if c and p ~= true then
context(c)
return
end
end
context(c) -- number
end
function commands.MPr(id)
local jpi = collected[id]
if jpi then
local r = jpi.r
if r and p ~= true then
context(r)
return
end
end
end
local function MPpardata(n)
local t = collected[n]
if not t then
local tag = format("p:%s",n)
t = collected[tag]
end
if t then
context("%.5fpt,%.5fpt,%.5fpt,%.5fpt,%s,%.5fpt",
t.hs*pt,
t.ls*pt,
t.rs*pt,
t.hi*pt,
t.ha,
t.pi*pt
)
else
context("0,0,0,0,0,0") -- for mp only
end
end
commands.MPpardata = MPpardata
function commands.MPposset(id) -- special helper, used in backgrounds
local b = format("b:%s",id)
local e = format("e:%s",id)
local w = format("w:%s",id)
local p = format("p:%s",jobpositions.n(b))
MPpos(b) context(",") MPpos(e) context(",") MPpos(w) context(",") MPpos(p) context(",") MPpardata(p)
end
function commands.MPls(id)
local t = collected[id]
if t then
context("%.5fpt",t.ls*pt)
else
context("0pt")
end
end
function commands.MPrs(id)
local t = collected[id]
if t then
context("%.5fpt",t.rs*pt)
else
context("0pt")
end
end
local splitter = lpeg.tsplitat(",")
function commands.MPplus(id,n,default)
local jpi = collected[id]
if jpi then
local e = jpi.e
if e then
local split = jpi.split
if not split then
split = lpegmatch(splitter,jpi.e)
jpi.split = split
end
context(split[n] or default)
return
end
end
context(default)
end
function commands.MPrest(id,default)
local jpi = collected[id]
context(jpi and jpi.e or default)
end
function commands.MPxywhd(id)
local t = collected[id]
if t then
context("%.5fpt,%.5fpt,%.5fpt,%.5fpt,%.5fpt",
t.x*pt,
t.y*pt,
t.w*pt,
t.h*pt,
t.d*pt
)
else
context("0,0,0,0,0") -- for mp only
end
end
-- is testcase already defined? if so, then local
function commands.doifpositionelse(name)
commands.doifelse(collected[name])
end
function commands.doifpositionelse(name)
commands.doif(collected[name])
end
function commands.doifpositiononpage(name,page) -- probably always realpageno
local c = collected[name]
commands.testcase(c and c.p == page)
end
function commands.doifoverlappingelse(one,two,overlappingmargin)
commands.testcase(overlapping(one,two,overlappingmargin))
end
function commands.doifpositionsonsamepageelse(list,page)
commands.testcase(onsamepage(list))
end
function commands.doifpositionsonthispageelse(list)
commands.testcase(onsamepage(list,tostring(tex.count.realpageno)))
end
commands.markcolumnbox = jobpositions.markcolumnbox
commands.markregionbox = jobpositions.markregionbox
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