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|
if not modules then modules = { } end modules ['anch-loc'] = {
version = 1.001,
comment = "companion to anch-loc.lmtx",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local next, type = next, type
local setmetatableindex, sortedhash, insert, remove = table.setmetatableindex, table.sortedhash, table.insert, table.remove
local context = context
local nuts = nodes.nuts
local nodepool = nodes.pool
local whatever = nodepool.userids["localanchor"]
local new_usernode = nodepool.usernode
local new_kern = nuts.pool.kern
local getbox = nuts.getbox
local getwidth = nuts.getwidth
local setwidth = nuts.setwidth
local getprop = nuts.getprop
local insertbefore = nuts.insertbefore
local insertafter = nuts.insertafter
local setattributelist = nuts.setattributelist
local texgetbox = tex.getbox
local implement = interfaces.implement
local analyze = drivers.converters.analyze
local dimension_value = tokens.values.dimension
local v_left = interfaces.variables.left
local v_middle = interfaces.variables.middle
local positionsstack = setmetatableindex("table")
local function allocate2(t,k)
local v = { min = false, max = false }
t[k] = v
return v
end
local function allocate1(t,k)
local v = setmetatableindex({ cnt = { }, min = false, max = false }, allocate2)
t[k] = v
return v
end
local positions = setmetatableindex(allocate1)
-- The basics:
local function pushpositions()
insert(positionsstack,positions)
positions = setmetatableindex(allocate1)
end
local function poppositions()
positions = remove(positionsstack) or { }
end
local function initializepositions(driver,specification)
-- positions.width = specification.boundingbox[3]
-- positions.height = specification.boundingbox[4]
end
-- local function finalizepositions(...)
-- end
local function collectpositions(current,pos_h,pos_v,cur_b)
-- beware, we actually can have a copy due to setting trialrun so we cannot
-- fetch the nodetable directly but go via the metatable ... fast enough
local data = getprop(current,"data")
local hash = positions[data.name]
local x = data.x
local y = data.y
if not hash.min then
hash.min = x
hash.max = x
elseif x > hash.max then
hash.max = x
end
hash = hash[x]
if not hash.min then
hash.min = y
hash.max = y
elseif y > hash.max then
hash.max = y
end
hash[y] = { pos_h, pos_v, data, current, 0, false, cur_b }
end
local function valid(name,x,y)
if positions then
local xlist = positions[name]
if xlist then
xlist = xlist[x]
return xlist and xlist[y]
end
end
end
local function anchorx(name,x,y)
local v = valid(name,x,y)
return v and v[1] or 0
end
local function anchory(name,x,y)
local v = valid(name,x,y)
return v and v[2] or 0
end
local function anchorht(name,x,y)
local v = valid(name,x,y)
if v then
return v[7][2]
else
return 0
end
end
local function anchordp(name,x,y)
local v = valid(name,x,y)
if v then
return v[7][3]
else
return 0
end
end
local function anchorlr(name,x,y)
local v = valid(name,x,y)
if v then
return v[1] + v[7][1], v[2] - v[7][3]
else
return 0, 0
end
end
local function anchorur(name,x,y)
local v = valid(name,x,y)
if v then
return v[1] + v[7][1], v[2] + v[7][2]
else
return 0, 0
end
end
local function anchorul(name,x,y)
local v = valid(name,x,y)
if v then
return v[1], v[2] + v[7][2]
else
return 0, 0
end
end
local function anchorll(name,x,y)
local v = valid(name,x,y)
if v then
return v[1], v[2] - v[7][3]
else
return 0, 0
end
end
local function anchorxy(name,x,y)
local v = valid(name,x,y)
if v then
return v[1], v[2]
else
return 0, 0
end
end
local driver = {
actions = {
initialize = initializepositions,
-- finalize = finalizepositions,
},
flushers = {
userdefined = {
[whatever] = collectpositions,
}
}
}
function drivers.converters.resyncbox(n)
local b = getbox(n)
analyze(driver,b)
for name, position in next, positions do
local xlast = { }
local aligned = false
for c=position.min,position.max do
local column = position[c]
if column then
local min = column.min
if min then
local max = column.max
local xlimit = 0
for r=min,max do
local cell = column[r]
if cell and cell[3].kind == "sync" then
local x = cell[1]
local l = xlast[r]
if l and l ~= 0 then
x = x + l
cell[1] = x
end
if x > xlimit then
xlimit = x
end
if not aligned then
aligned = cell[3].align
end
end
end
for r=min,max do
local cell = column[r]
if cell and cell[3].kind == "sync" then
local progress = xlimit - cell[1]
if aligned or progress ~= 0 then
local kern = new_kern(progress)
local current = cell[4]
setattributelist(kern,current)
insertafter(current,current,kern) -- why does before not work
cell[5] = progress
cell[6] = kern
xlast[r] = (xlast[r] or 0) + progress
end
end
end
end
end
end
if aligned then
local min = position.min
local max = position.max
local previous = { }
for c=min,max do
local column = position[c]
if column then
local min = column.min
if min then
local max = column.max
for r=min,max do
local cell = column[r]
if cell then
local prev = previous[r]
if prev then
local align = prev[3].align
if align then
local p = prev[6]
local n = cell[6]
local d = cell[5]
if align == "r" or align == v_right then
setwidth(p,getwidth(p)+d)
setwidth(n,getwidth(n)-d)
elseif align == "c" or align == "m" or align == v_middle then
setwidth(p,getwidth(p)+d/2)
setwidth(n,getwidth(n)-d/2)
end
end
end
previous[r] = cell
end
end
end
end
end
end
end
return b
end
-- The ConTeXt interface (at that end we call them localanchors):
implement {
name = "pushlocalanchors",
public = true,
protected = true,
untraced = true,
actions = pushpositions,
}
implement {
name = "poplocalanchors",
public = true,
protected = true,
untraced = true,
actions = poppositions,
}
implement {
name = "analyzelocalanchors",
arguments = { "integerargument" },
public = true,
protected = true,
untraced = true,
actions = function(n)
analyze(driver,texgetbox(n))
end
}
implement {
name = "synchronizelocalanchors",
arguments = { "integerargument" },
public = true,
protected = true,
untraced = true,
actions = drivers.converters.resyncbox,
}
implement {
name = "setlocalsyncanchor",
arguments = { "argument", "integerargument", "integerargument" },
public = true,
protected = true,
usage = "value",
actions = function(name,x,y)
-- value node ... only hlist or vlist or whatsit but we need trialmode so:
context(new_usernode(whatever,{ name = name, kind = "sync", x = x, y = y }))
end
}
implement {
name = "setlocalalignanchor",
arguments = { "argument", "integerargument", "integerargument", "argument" },
public = true,
protected = true,
usage = "value",
actions = function(name,x,y,align)
-- value node ... only hlist or vlist or whatsit but we need trialmode so:
context(new_usernode(whatever,{ name = name, kind = "sync", x = x, y = y, align = align }))
end
}
implement {
name = "setlocalmarkanchor",
arguments = { "argument", "integerargument", "integerargument" },
public = true,
protected = true,
usage = "value",
actions = function(name,x,y)
context(new_usernode(whatever,{ name = name, kind = "mark", x = x, y = y }))
end
}
implement {
name = "localanchorx",
arguments = { "argument", "integerargument", "integerargument" },
public = true,
usage = "value",
actions = function(name,x,y)
return dimension_value, anchorx(name,x,y)
end
}
implement {
name = "localanchory",
arguments = { "argument", "integerargument", "integerargument" },
public = true,
usage = "value",
actions = function(name,x,y)
return dimension_value, anchory(name,x,y)
end
}
interfaces.implement {
name = "sync",
arguments = { "argument", "integerargument" },
protected = true,
public = true,
actions = function(name,x)
local t = positions[name].cnt
local y = (t[x] or 0) + 1
t[x] = y
context(new_usernode(whatever,{ name = name, kind = "sync", x = x, y = y }))
end,
}
interfaces.implement {
name = "async",
arguments = { "argument", "integerargument", "argument" },
protected = true,
untraced = true,
public = true,
actions = function(name,x,align)
local t = positions[name].cnt
local y = (t[x] or 0) + 1
t[x] = y
context(new_usernode(whatever,{ name = name, kind = "sync", x = x, y = y, align = align }))
end,
}
-- The MetaFun interface:
do
local injectors = mp.inject
local scanners = mp.scan
local injectnumeric = injectors.numeric
local injectpair = injectors.pair
local injectpath = injectors.path
local scaninteger = scanners.integer
local scanstring = scanners.string
local bpfactor = number.dimenfactors.bp
local registerscript = metapost.registerscript
local registerdirect = metapost.registerdirect
registerscript("anchorxy", function()
local x, y = anchorxy(scanstring(),scaninteger(),scaninteger())
return injectpair(x*bpfactor,y*bpfactor)
end)
registerdirect("anchorx", function() return anchorx(scanstring(),scaninteger(),scaninteger()) * bpfactor end)
registerdirect("anchory", function() return anchory(scanstring(),scaninteger(),scaninteger()) * bpfactor end)
registerdirect("anchorht", function() return anchorht(scanstring(),scaninteger(),scaninteger()) * bpfactor end)
registerdirect("anchordp", function() return anchordp(scanstring(),scaninteger(),scaninteger()) * bpfactor end)
local function corner(f)
local x, y = f(scanstring(),scaninteger(),scaninteger())
return injectpair(x*bpfactor,y*bpfactor)
end
registerdirect("anchorlr", function() return corner(anchorlr) end)
registerdirect("anchorur", function() return corner(anchorur) end)
registerdirect("anchorul", function() return corner(anchorul) end)
registerdirect("anchorll", function() return corner(anchorll) end)
registerscript("anchorbox", function()
local l = valid(scanstring(),scaninteger(),scaninteger())
local r = valid(scanstring(),scaninteger(),scaninteger())
local llx, lly, urx, ury, llb, urb
if l and r then
llx = l[1]
lly = l[2]
urx = r[1]
ury = r[2]
llb = l[7]
urb = r[7]
if llx > urx then
llx, urx = urx, llx
end
if lly > ury then
lly, ury = ury, lly
lly = lly - urb[3]
ury = ury + llb[2]
else
lly = lly - llb[3]
ury = ury + urb[2]
end
llx = llx * bpfactor
lly = lly * bpfactor
urx = urx * bpfactor
ury = ury * bpfactor
else
llx = 0
lly = 0
urx = 0
ury = 0
end
local p = {
cycle = true,
curled = true,
{ llx, lly },
{ urx, lly },
{ urx, ury },
{ llx, ury }
}
injectpath(p)
end)
-- boundingbox (
-- anchorul(lname, lx, ly) --
-- anchorlr(rname, rx, ry)
-- )
local min = math.min
local max = math.max
registerscript("anchorspan", function()
local l = valid(scanstring(),scaninteger(),scaninteger())
local r = valid(scanstring(),scaninteger(),scaninteger())
local llx, lly, urx, ury, lb, ub
if l and r then
lb = l[7]
rb = r[7]
llx = min((l[1] ),(r[1] )) * bpfactor
lly = min((l[2] - lb[3]),(r[2] - rb[3])) * bpfactor
urx = max((l[1] + lb[1]),(r[1] + rb[1])) * bpfactor
ury = max((l[2] + lb[2]),(r[2] + rb[2])) * bpfactor
else
llx = 0
lly = 0
urx = 0
ury = 0
end
local p = {
cycle = true,
-- curled = true,
{ llx, lly },
{ urx, lly },
{ urx, ury },
{ llx, ury }
}
injectpath(p)
end)
end
|