diff options
Diffstat (limited to 'tex/context/base/math-fbk.lua')
| -rw-r--r-- | tex/context/base/math-fbk.lua | 281 |
1 files changed, 0 insertions, 281 deletions
diff --git a/tex/context/base/math-fbk.lua b/tex/context/base/math-fbk.lua deleted file mode 100644 index b2b7ed5f0..000000000 --- a/tex/context/base/math-fbk.lua +++ /dev/null @@ -1,281 +0,0 @@ -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 %q with U+%05X",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 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 - 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 - |