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-rw-r--r--tex/context/base/math-fbk.lua624
1 files changed, 312 insertions, 312 deletions
diff --git a/tex/context/base/math-fbk.lua b/tex/context/base/math-fbk.lua
index f34019b6e..eebc4e4e7 100644
--- a/tex/context/base/math-fbk.lua
+++ b/tex/context/base/math-fbk.lua
@@ -1,312 +1,312 @@
-if not modules then modules = { } end modules ['math-fbk'] = {
- version = 1.001,
- comment = "companion to math-ini.mkiv",
- author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
- copyright = "PRAGMA ADE / ConTeXt Development Team",
- license = "see context related readme files"
-}
-
-local trace_fallbacks = false trackers.register("math.fallbacks", function(v) trace_fallbacks = v end)
-
-local report_fallbacks = logs.reporter("math","fallbacks")
-
-local fallbacks = { }
-mathematics.fallbacks = fallbacks
-
-local virtualcharacters = { }
-
-local identifiers = fonts.hashes.identifiers
-local lastmathids = fonts.hashes.lastmathids
-
--- we need a trick (todo): if we define scriptscript, script and text in
--- that order we could use their id's .. i.e. we could always add a font
--- table with those id's .. in fact, we could also add a whole lot more
--- as it doesn't hurt
---
--- todo: use index 'true when luatex provides that feature (on the agenda)
-
-function fallbacks.apply(target,original)
- local mathparameters = target.mathparameters -- why not hasmath
- if mathparameters then
- local characters = target.characters
- local parameters = target.parameters
- local mathsize = parameters.mathsize
- local size = parameters.size
- local usedfonts = target.fonts
- if not usedfonts then
- usedfonts = { }
- target.fonts = usedfonts
- end
- -- This is not okay yet ... we have no proper way to refer to 'self'
- -- otherwise I will make my own id allocator).
-local self = #usedfonts == 0 and font.nextid() or nil -- will be true
- local textid, scriptid, scriptscriptid
- local textindex, scriptindex, scriptscriptindex
- local textdata, scriptdata, scriptscriptdata
- if mathsize == 3 then
- -- scriptscriptsize
- -- textid = nil -- self
- -- scriptid = nil -- no smaller
- -- scriptscriptid = nil -- no smaller
-textid = self
-scriptid = self
-scriptscriptid = self
- elseif mathsize == 2 then
- -- scriptsize
- -- textid = nil -- self
-textid = self
- scriptid = lastmathids[3]
- scriptscriptid = lastmathids[3]
- else
- -- textsize
- -- textid = nil -- self
-textid = self
- scriptid = lastmathids[2]
- scriptscriptid = lastmathids[3]
- end
- if textid then
- textindex = #usedfonts + 1
- usedfonts[textindex] = { id = textid }
- textdata = identifiers[textid]
- else
- textdata = target
- end
- if scriptid then
- scriptindex = #usedfonts + 1
- usedfonts[scriptindex] = { id = scriptid }
- scriptdata = identifiers[scriptid]
- else
- scriptindex = textindex
- scriptdata = textdata
- end
- if scriptscriptid then
- scriptscriptindex = #usedfonts + 1
- usedfonts[scriptscriptindex] = { id = scriptscriptid }
- scriptscriptdata = identifiers[scriptscriptid]
- else
- scriptscriptindex = scriptindex
- scriptscriptdata = scriptdata
- end
--- report_fallbacks("used textid: %s, used script id: %s, used scriptscript id: %s",
--- tostring(textid),tostring(scriptid),tostring(scriptscriptid))
- local data = {
- textdata = textdata,
- scriptdata = scriptdata,
- scriptscriptdata = scriptscriptdata,
- textindex = textindex,
- scriptindex = scriptindex,
- scriptscriptindex = scriptscriptindex,
- characters = characters,
- unicode = k,
- target = target,
- original = original,
- size = size,
- mathsize = mathsize,
- }
--- inspect(usedfonts)
- for k, v in next, virtualcharacters do
- if not characters[k] then
- local tv = type(v)
- if tv == "table" then
- characters[k] = v
- elseif tv == "number" then
- characters[k] = characters[v]
- elseif tv == "function" then
- characters[k] = v(data)
- end
- if trace_fallbacks then
- if characters[k] then
- report_fallbacks("extending font %a with %U",target.properties.fullname,k)
- end
- end
- end
- end
- end
-end
-
-utilities.sequencers.appendaction("aftercopyingcharacters","system","mathematics.fallbacks.apply")
-
-function fallbacks.install(unicode,value)
- virtualcharacters[unicode] = value
-end
-
--- a few examples:
-
-local function reference(index,char)
- if index then
- return { "slot", index, char }
- else
- return { "char", char }
- end
-end
-
-local function raised(data,down)
- local replacement = data.replacement
- local character = data.scriptdata.characters[replacement]
- if character then
- return {
- width = character.width,
- height = character.height,
- depth = character.depth,
- commands = {
- { "down", down and data.size/4 or -data.size/2 }, -- maybe exheight
- reference(data.scriptindex,replacement)
- }
- }
- end
-end
-
--- virtualcharacters[0x207A] = 0x2212
--- virtualcharacters[0x207B] = 0x002B
--- virtualcharacters[0x208A] = 0x2212
--- virtualcharacters[0x208B] = 0x002B
-
-virtualcharacters[0x207A] = function(data)
- data.replacement = 0x2212
- return raised(data)
-end
-
-virtualcharacters[0x207B] = function(data)
- data.replacement = 0x002B
- return raised(data)
-end
-
-virtualcharacters[0x208A] = function(data)
- data.replacement = 0x2212
- return raised(data,true)
-end
-
-virtualcharacters[0x208B] = function(data)
- data.replacement = 0x002B
- return raised(data,true)
-end
-
--- local function repeated(data,char,n,fraction)
--- local character = data.characters[char]
--- if character then
--- local width = character.width
--- local delta = width - character.italic -- width * fraction
--- local c = { "char", char }
--- local r = { "right", right }
--- local commands = { }
--- for i=1,n-1 do
--- width = width + delta
--- commands[#commands+1] = c
--- commands[#commands+1] = -delta
--- end
--- commands[#commands+1] = c
--- return {
--- width = width,
--- height = character.height,
--- depth = character.depth,
--- commands = commands,
--- }
--- end
--- end
-
--- virtualcharacters[0x222C] = function(data)
--- return repeated(data,0x222B,2,1/8)
--- end
-
--- virtualcharacters[0x222D] = function(data)
--- return repeated(data,0x222B,3,1/8)
--- end
-
-local addextra = mathematics.extras.add
-
-addextra(0xFE350, {
- category="sm",
- description="MATHEMATICAL DOUBLE ARROW LEFT END",
- mathclass="relation",
- mathname="ctxdoublearrowfillleftend",
- unicodeslot=0xFE350,
-} )
-
-addextra(0xFE351, {
- category="sm",
- description="MATHEMATICAL DOUBLE ARROW MIDDLE PART",
- mathclass="relation",
- mathname="ctxdoublearrowfillmiddlepart",
- unicodeslot=0xFE351,
-} )
-
-addextra(0xFE352, {
- category="sm",
- description="MATHEMATICAL DOUBLE ARROW RIGHT END",
- mathclass="relation",
- mathname="ctxdoublearrowfillrightend",
- unicodeslot=0xFE352,
-} )
-
-local push = { "push" }
-local pop = { "pop" }
-local leftarrow = { "char", 0x2190 }
-local relbar = { "char", 0x2212 }
-local rightarrow = { "char", 0x2192 }
-
-virtualcharacters[0xFE350] = function(data)
- -- return combined(data,0x2190,0x2212) -- leftarrow relbar
- local charone = data.characters[0x2190]
- local chartwo = data.characters[0x2212]
- if charone and chartwo then
- local size = data.size/2
- return {
- width = chartwo.width,
- height = size,
- depth = size,
- commands = {
- push,
- { "down", size/2 },
- leftarrow,
- pop,
- { "down", -size/2 },
- relbar,
- }
- }
- end
-end
-
-virtualcharacters[0xFE351] = function(data)
- -- return combined(data,0x2212,0x2212) -- relbar, relbar (isn't that just equal)
- local char = data.characters[0x2212]
- if char then
- local size = data.size/2
- return {
- width = char.width,
- height = size,
- depth = size,
- commands = {
- push,
- { "down", size/2 },
- relbar,
- pop,
- { "down", -size/2 },
- relbar,
- }
- }
- end
-end
-
-virtualcharacters[0xFE352] = function(data)
- -- return combined(data,0x2192,0x2212) -- rightarrow relbar
- local charone = data.characters[0x2192]
- local chartwo = data.characters[0x2212]
- if charone and chartwo then
- local size = data.size/2
- return {
- width = chartwo.width,
- height = size,
- depth = size,
- commands = {
- push,
- { "down", size/2 },
- relbar,
- pop,
- { "right", chartwo.width - charone.width },
- { "down", -size/2 },
- rightarrow,
- }
- }
- end
-end
-
+if not modules then modules = { } end modules ['math-fbk'] = {
+ version = 1.001,
+ comment = "companion to math-ini.mkiv",
+ author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+ copyright = "PRAGMA ADE / ConTeXt Development Team",
+ license = "see context related readme files"
+}
+
+local trace_fallbacks = false trackers.register("math.fallbacks", function(v) trace_fallbacks = v end)
+
+local report_fallbacks = logs.reporter("math","fallbacks")
+
+local fallbacks = { }
+mathematics.fallbacks = fallbacks
+
+local virtualcharacters = { }
+
+local identifiers = fonts.hashes.identifiers
+local lastmathids = fonts.hashes.lastmathids
+
+-- we need a trick (todo): if we define scriptscript, script and text in
+-- that order we could use their id's .. i.e. we could always add a font
+-- table with those id's .. in fact, we could also add a whole lot more
+-- as it doesn't hurt
+--
+-- todo: use index 'true when luatex provides that feature (on the agenda)
+
+function fallbacks.apply(target,original)
+ local mathparameters = target.mathparameters -- why not hasmath
+ if mathparameters then
+ local characters = target.characters
+ local parameters = target.parameters
+ local mathsize = parameters.mathsize
+ local size = parameters.size
+ local usedfonts = target.fonts
+ if not usedfonts then
+ usedfonts = { }
+ target.fonts = usedfonts
+ end
+ -- This is not okay yet ... we have no proper way to refer to 'self'
+ -- otherwise I will make my own id allocator).
+local self = #usedfonts == 0 and font.nextid() or nil -- will be true
+ local textid, scriptid, scriptscriptid
+ local textindex, scriptindex, scriptscriptindex
+ local textdata, scriptdata, scriptscriptdata
+ if mathsize == 3 then
+ -- scriptscriptsize
+ -- textid = nil -- self
+ -- scriptid = nil -- no smaller
+ -- scriptscriptid = nil -- no smaller
+textid = self
+scriptid = self
+scriptscriptid = self
+ elseif mathsize == 2 then
+ -- scriptsize
+ -- textid = nil -- self
+textid = self
+ scriptid = lastmathids[3]
+ scriptscriptid = lastmathids[3]
+ else
+ -- textsize
+ -- textid = nil -- self
+textid = self
+ scriptid = lastmathids[2]
+ scriptscriptid = lastmathids[3]
+ end
+ if textid then
+ textindex = #usedfonts + 1
+ usedfonts[textindex] = { id = textid }
+ textdata = identifiers[textid]
+ else
+ textdata = target
+ end
+ if scriptid then
+ scriptindex = #usedfonts + 1
+ usedfonts[scriptindex] = { id = scriptid }
+ scriptdata = identifiers[scriptid]
+ else
+ scriptindex = textindex
+ scriptdata = textdata
+ end
+ if scriptscriptid then
+ scriptscriptindex = #usedfonts + 1
+ usedfonts[scriptscriptindex] = { id = scriptscriptid }
+ scriptscriptdata = identifiers[scriptscriptid]
+ else
+ scriptscriptindex = scriptindex
+ scriptscriptdata = scriptdata
+ end
+-- report_fallbacks("used textid: %s, used script id: %s, used scriptscript id: %s",
+-- tostring(textid),tostring(scriptid),tostring(scriptscriptid))
+ local data = {
+ textdata = textdata,
+ scriptdata = scriptdata,
+ scriptscriptdata = scriptscriptdata,
+ textindex = textindex,
+ scriptindex = scriptindex,
+ scriptscriptindex = scriptscriptindex,
+ characters = characters,
+ unicode = k,
+ target = target,
+ original = original,
+ size = size,
+ mathsize = mathsize,
+ }
+-- inspect(usedfonts)
+ for k, v in next, virtualcharacters do
+ if not characters[k] then
+ local tv = type(v)
+ if tv == "table" then
+ characters[k] = v
+ elseif tv == "number" then
+ characters[k] = characters[v]
+ elseif tv == "function" then
+ characters[k] = v(data)
+ end
+ if trace_fallbacks then
+ if characters[k] then
+ report_fallbacks("extending font %a with %U",target.properties.fullname,k)
+ end
+ end
+ end
+ end
+ end
+end
+
+utilities.sequencers.appendaction("aftercopyingcharacters","system","mathematics.fallbacks.apply")
+
+function fallbacks.install(unicode,value)
+ virtualcharacters[unicode] = value
+end
+
+-- a few examples:
+
+local function reference(index,char)
+ if index then
+ return { "slot", index, char }
+ else
+ return { "char", char }
+ end
+end
+
+local function raised(data,down)
+ local replacement = data.replacement
+ local character = data.scriptdata.characters[replacement]
+ if character then
+ return {
+ width = character.width,
+ height = character.height,
+ depth = character.depth,
+ commands = {
+ { "down", down and data.size/4 or -data.size/2 }, -- maybe exheight
+ reference(data.scriptindex,replacement)
+ }
+ }
+ end
+end
+
+-- virtualcharacters[0x207A] = 0x2212
+-- virtualcharacters[0x207B] = 0x002B
+-- virtualcharacters[0x208A] = 0x2212
+-- virtualcharacters[0x208B] = 0x002B
+
+virtualcharacters[0x207A] = function(data)
+ data.replacement = 0x2212
+ return raised(data)
+end
+
+virtualcharacters[0x207B] = function(data)
+ data.replacement = 0x002B
+ return raised(data)
+end
+
+virtualcharacters[0x208A] = function(data)
+ data.replacement = 0x2212
+ return raised(data,true)
+end
+
+virtualcharacters[0x208B] = function(data)
+ data.replacement = 0x002B
+ return raised(data,true)
+end
+
+-- local function repeated(data,char,n,fraction)
+-- local character = data.characters[char]
+-- if character then
+-- local width = character.width
+-- local delta = width - character.italic -- width * fraction
+-- local c = { "char", char }
+-- local r = { "right", right }
+-- local commands = { }
+-- for i=1,n-1 do
+-- width = width + delta
+-- commands[#commands+1] = c
+-- commands[#commands+1] = -delta
+-- end
+-- commands[#commands+1] = c
+-- return {
+-- width = width,
+-- height = character.height,
+-- depth = character.depth,
+-- commands = commands,
+-- }
+-- end
+-- end
+
+-- virtualcharacters[0x222C] = function(data)
+-- return repeated(data,0x222B,2,1/8)
+-- end
+
+-- virtualcharacters[0x222D] = function(data)
+-- return repeated(data,0x222B,3,1/8)
+-- end
+
+local addextra = mathematics.extras.add
+
+addextra(0xFE350, {
+ category="sm",
+ description="MATHEMATICAL DOUBLE ARROW LEFT END",
+ mathclass="relation",
+ mathname="ctxdoublearrowfillleftend",
+ unicodeslot=0xFE350,
+} )
+
+addextra(0xFE351, {
+ category="sm",
+ description="MATHEMATICAL DOUBLE ARROW MIDDLE PART",
+ mathclass="relation",
+ mathname="ctxdoublearrowfillmiddlepart",
+ unicodeslot=0xFE351,
+} )
+
+addextra(0xFE352, {
+ category="sm",
+ description="MATHEMATICAL DOUBLE ARROW RIGHT END",
+ mathclass="relation",
+ mathname="ctxdoublearrowfillrightend",
+ unicodeslot=0xFE352,
+} )
+
+local push = { "push" }
+local pop = { "pop" }
+local leftarrow = { "char", 0x2190 }
+local relbar = { "char", 0x2212 }
+local rightarrow = { "char", 0x2192 }
+
+virtualcharacters[0xFE350] = function(data)
+ -- return combined(data,0x2190,0x2212) -- leftarrow relbar
+ local charone = data.characters[0x2190]
+ local chartwo = data.characters[0x2212]
+ if charone and chartwo then
+ local size = data.size/2
+ return {
+ width = chartwo.width,
+ height = size,
+ depth = size,
+ commands = {
+ push,
+ { "down", size/2 },
+ leftarrow,
+ pop,
+ { "down", -size/2 },
+ relbar,
+ }
+ }
+ end
+end
+
+virtualcharacters[0xFE351] = function(data)
+ -- return combined(data,0x2212,0x2212) -- relbar, relbar (isn't that just equal)
+ local char = data.characters[0x2212]
+ if char then
+ local size = data.size/2
+ return {
+ width = char.width,
+ height = size,
+ depth = size,
+ commands = {
+ push,
+ { "down", size/2 },
+ relbar,
+ pop,
+ { "down", -size/2 },
+ relbar,
+ }
+ }
+ end
+end
+
+virtualcharacters[0xFE352] = function(data)
+ -- return combined(data,0x2192,0x2212) -- rightarrow relbar
+ local charone = data.characters[0x2192]
+ local chartwo = data.characters[0x2212]
+ if charone and chartwo then
+ local size = data.size/2
+ return {
+ width = chartwo.width,
+ height = size,
+ depth = size,
+ commands = {
+ push,
+ { "down", size/2 },
+ relbar,
+ pop,
+ { "right", chartwo.width - charone.width },
+ { "down", -size/2 },
+ rightarrow,
+ }
+ }
+ end
+end
+
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