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if not modules then modules = { } end modules ['font-hsh'] = {
version = 1.001,
comment = "companion to font-ini.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local rawget = rawget
local setmetatableindex = table.setmetatableindex
local currentfont = font.current
local allocate = utilities.storage.allocate
local fonts = fonts
local hashes = fonts.hashes or allocate()
fonts.hashes = hashes
-- todo: autoallocate ... just create on the fly .. use constructors.keys (problem: plurals)
local identifiers = hashes.identifiers or allocate()
local characters = hashes.characters or allocate() -- chardata
local descriptions = hashes.descriptions or allocate()
local parameters = hashes.parameters or allocate()
local properties = hashes.properties or allocate()
local resources = hashes.resources or allocate()
local spacings = hashes.spacings or allocate()
local spaces = hashes.spaces or allocate()
local quads = hashes.quads or allocate() -- maybe also spacedata
local xheights = hashes.xheights or allocate()
local csnames = hashes.csnames or allocate() -- namedata
local features = hashes.features or allocate()
local marks = hashes.marks or allocate()
local italics = hashes.italics or allocate()
local lastmathids = hashes.lastmathids or allocate()
local dynamics = hashes.dynamics or allocate()
local unicodes = hashes.unicodes or allocate()
local originals = hashes.originals or allocate()
local modes = hashes.modes or allocate()
hashes.characters = characters
hashes.descriptions = descriptions
hashes.parameters = parameters
hashes.properties = properties
hashes.resources = resources
hashes.spacings = spacings
hashes.spaces = spaces
hashes.quads = quads hashes.emwidths = quads
hashes.xheights = xheights hashes.exheights = xheights
hashes.csnames = csnames
hashes.features = features
hashes.marks = marks
hashes.italics = italics
hashes.lastmathids = lastmathids
hashes.dynamics = dynamics
hashes.unicodes = unicodes
hashes.originals = originals
hashes.modes = modes
local nodepool = nodes.pool
local dummyglyph = nodepool.register(nodepool.glyph())
local nulldata = allocate {
name = "nullfont",
characters = { },
descriptions = { },
properties = { },
parameters = { -- lmromanregular @ 12pt
slantperpoint = 0,
spacing = {
width = 256377,
stretch = 128188,
shrink = 85459,
extra = 85459,
},
quad = 786432,
xheight = 338952,
-- compatibility:
slant = 0, -- 1
space = 256377, -- 2
space_stretch = 128188, -- 3
space_shrink = 85459, -- 4
x_height = 338952, -- 5
quad = 786432, -- 6
extra_space = 85459, -- 7
},
}
fonts.nulldata = nulldata
fonts.constructors.enhanceparameters(nulldata.parameters) -- official copies for us
setmetatableindex(identifiers, function(t,k)
return k == true and identifiers[currentfont()] or nulldata
end)
setmetatableindex(characters, function(t,k)
if k == true then
return characters[currentfont()]
else
local characters = identifiers[k].characters
t[k] = characters
return characters
end
end)
setmetatableindex(descriptions, function(t,k)
if k == true then
return descriptions[currentfont()]
else
local descriptions = identifiers[k].descriptions
t[k] = descriptions
return descriptions
end
end)
setmetatableindex(parameters, function(t,k)
if k == true then
return parameters[currentfont()]
else
local parameters = identifiers[k].parameters
t[k] = parameters
return parameters
end
end)
setmetatableindex(properties, function(t,k)
if k == true then
return properties[currentfont()]
else
local properties = identifiers[k].properties
t[k] = properties
return properties
end
end)
setmetatableindex(resources, function(t,k)
if k == true then
return resources[currentfont()]
else
local shared = identifiers[k].shared
local rawdata = shared and shared.rawdata
local resources = rawdata and rawdata.resources
t[k] = resources or false -- better than resolving each time
return resources
end
end)
setmetatableindex(features, function(t,k)
if k == true then
return features[currentfont()]
else
local shared = identifiers[k].shared
local features = shared and shared.features or { }
t[k] = features
return features
end
end)
local nospacing = {
width = 0,
stretch = 0,
shrink = 0,
extra = 0,
}
setmetatableindex(spacings, function(t,k)
if k == true then
return spacings[currentfont()]
else
local parameters = parameters[k]
local spacing = parameters and parameters.spacing or nospacing
t[k] = spacing
return spacing
end
end)
setmetatableindex(spaces, function(t,k)
if k == true then
return spaces[currentfont()]
else
local space = spacings[k].width
t[k] = space
return space
end
end)
setmetatableindex(marks, function(t,k)
if k == true then
return marks[currentfont()]
else
local resources = identifiers[k].resources or { }
local marks = resources.marks or { }
t[k] = marks
return marks
end
end)
setmetatableindex(quads, function(t,k)
if k == true then
return quads[currentfont()]
else
local parameters = rawget(parameters,k)
local quad
if parameters then
quad = parameters.quad
else
dummyglyph.font = k
dummyglyph.char = 0x2014 -- emdash
quad = dummyglyph.width -- dirty trick
end
if not quad or quad == 0 then
quad = 655360 -- lm 10pt
end
t[k] = quad
return quad
end
end)
setmetatableindex(xheights, function(t,k)
if k == true then
return xheights[currentfont()]
else
local parameters = rawget(parameters,k)
local xheight
if parameters then
xheight = parameters.xheight
else
dummyglyph.font = k
dummyglyph.char = 0x78 -- x
xheight = dummyglyph.height -- dirty trick
end
if not xheight or xheight == 0 then
xheight = 282460 -- lm 10pt
end
t[k] = xheight
return xheight
end
end)
setmetatableindex(italics, function(t,k) -- is test !
if k == true then
return italics[currentfont()]
else
local properties = identifiers[k].properties
local hasitalics = properties and properties.hasitalics
if hasitalics then
hasitalics = characters[k] -- convenient return
else
hasitalics = false
end
t[k] = hasitalics
return hasitalics
end
end)
setmetatableindex(dynamics, function(t,k)
if k == true then
return dynamics[currentfont()]
else
local shared = identifiers[k].shared
local dynamics = shared and shared.dynamics or false
t[k] = dynamics
return dynamics
end
end)
setmetatableindex(unicodes, function(t,k) -- always a unicode
if k == true then
return unicodes[currentfont()]
else
local resources = resources[k]
local unicodes = resources and resources.unicodes or { }
t[k] = unicodes
return unicodes
end
end)
setmetatableindex(originals, function(t,k) -- always a unicode
if k == true then
return originals[currentfont()]
else
local resolved = { }
setmetatableindex(resolved,function(t,name)
local u = unicodes[k][name]
local d = u and descriptions[k][u]
local v = d and d.unicode or u or 0 -- so we return notdef (at least for the moment)
t[name] = u
return v
end)
t[k] = resolved
return resolved
end
end)
setmetatableindex(modes, function(t,k)
if k == true then
return modes[currentfont()]
else
local mode = properties[k].mode or "base"
t[k] = mode
return mode
end
end)
function font.getfont(id)
return identifiers[id]
end
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