diff options
Diffstat (limited to 'tex/context/base/font-otx.lua')
| -rw-r--r-- | tex/context/base/font-otx.lua | 404 |
1 files changed, 0 insertions, 404 deletions
diff --git a/tex/context/base/font-otx.lua b/tex/context/base/font-otx.lua deleted file mode 100644 index f39045223..000000000 --- a/tex/context/base/font-otx.lua +++ /dev/null @@ -1,404 +0,0 @@ -if not modules then modules = { } end modules ['font-otx'] = { - version = 1.001, - comment = "companion to font-otf.lua (analysing)", - author = "Hans Hagen, PRAGMA-ADE, Hasselt NL", - copyright = "PRAGMA ADE / ConTeXt Development Team", - license = "see context related readme files" -} - --- context only - -local type = type - -if not trackers then trackers = { register = function() end } end - ------ trace_analyzing = false trackers.register("otf.analyzing", function(v) trace_analyzing = v end) - -local fonts, nodes, node = fonts, nodes, node - -local allocate = utilities.storage.allocate - -local otf = fonts.handlers.otf - -local analyzers = fonts.analyzers -local initializers = allocate() -local methods = allocate() - -analyzers.initializers = initializers -analyzers.methods = methods ----------.useunicodemarks = false - -local a_state = attributes.private('state') - -local nodecodes = nodes.nodecodes -local glyph_code = nodecodes.glyph -local disc_code = nodecodes.disc -local math_code = nodecodes.math - -local traverse_id = node.traverse_id -local traverse_node_list = node.traverse -local end_of_math = node.end_of_math - -local fontdata = fonts.hashes.identifiers -local categories = characters and characters.categories or { } -- sorry, only in context -local chardata = characters and characters.data - -local otffeatures = fonts.constructors.newfeatures("otf") -local registerotffeature = otffeatures.register - ---[[ldx-- -<p>Analyzers run per script and/or language and are needed in order to -process features right.</p> ---ldx]]-- - --- never use these numbers directly - -local s_init = 1 local s_rphf = 7 -local s_medi = 2 local s_half = 8 -local s_fina = 3 local s_pref = 9 -local s_isol = 4 local s_blwf = 10 -local s_mark = 5 local s_pstf = 11 -local s_rest = 6 - -local states = { - init = s_init, - medi = s_medi, - fina = s_fina, - isol = s_isol, - mark = s_mark, - rest = s_rest, - rphf = s_rphf, - half = s_half, - pref = s_pref, - blwf = s_blwf, - pstf = s_pstf, -} - -local features = { - init = s_init, - medi = s_medi, - fina = s_fina, - isol = s_isol, - -- mark = s_mark, - -- rest = s_rest, - rphf = s_rphf, - half = s_half, - pref = s_pref, - blwf = s_blwf, - pstf = s_pstf, -} - -analyzers.states = states -analyzers.features = features -analyzers.useunicodemarks = false - --- todo: analyzers per script/lang, cross font, so we need an font id hash -> script --- e.g. latin -> hyphenate, arab -> 1/2/3 analyze -- its own namespace - -function analyzers.setstate(head,font) - local useunicodemarks = analyzers.useunicodemarks - local tfmdata = fontdata[font] - local descriptions = tfmdata.descriptions - local first, last, current, n, done = nil, nil, head, 0, false -- maybe make n boolean - while current do - local id = current.id - if id == glyph_code and current.font == font then - done = true - local char = current.char - local d = descriptions[char] - if d then - if d.class == "mark" then - done = true - current[a_state] = s_mark - elseif useunicodemarks and categories[char] == "mn" then - done = true - current[a_state] = s_mark - elseif n == 0 then - first, last, n = current, current, 1 - current[a_state] = s_init - else - last, n = current, n+1 - current[a_state] = s_medi - end - else -- finish - if first and first == last then - last[a_state] = s_isol - elseif last then - last[a_state] = s_fina - end - first, last, n = nil, nil, 0 - end - elseif id == disc_code then - -- always in the middle - current[a_state] = s_medi - last = current - else -- finish - if first and first == last then - last[a_state] = s_isol - elseif last then - last[a_state] = s_fina - end - first, last, n = nil, nil, 0 - if id == math_code then - current = end_of_math(current) - end - end - current = current.next - end - if first and first == last then - last[a_state] = s_isol - elseif last then - last[a_state] = s_fina - end - return head, done -end - --- in the future we will use language/script attributes instead of the --- font related value, but then we also need dynamic features which is --- somewhat slower; and .. we need a chain of them - -local function analyzeinitializer(tfmdata,value) -- attr - local script, language = otf.scriptandlanguage(tfmdata) -- attr - local action = initializers[script] - if not action then - -- skip - elseif type(action) == "function" then - return action(tfmdata,value) - else - local action = action[language] - if action then - return action(tfmdata,value) - end - end -end - -local function analyzeprocessor(head,font,attr) - local tfmdata = fontdata[font] - local script, language = otf.scriptandlanguage(tfmdata,attr) - local action = methods[script] - if not action then - -- skip - elseif type(action) == "function" then - return action(head,font,attr) - else - action = action[language] - if action then - return action(head,font,attr) - end - end - return head, false -end - -registerotffeature { - name = "analyze", - description = "analysis of character classes", - default = true, - initializers = { - node = analyzeinitializer, - }, - processors = { - position = 1, - node = analyzeprocessor, - } -} - --- latin - -methods.latn = analyzers.setstate - -local arab_warned = { } - -local function warning(current,what) - local char = current.char - if not arab_warned[char] then - log.report("analyze","arab: character %C has no %a class",char,what) - arab_warned[char] = true - end -end - -local mappers = { - l = s_init, -- left - d = s_medi, -- double - c = s_medi, -- joiner - r = s_fina, -- right - u = s_isol, -- nonjoiner -} - -local classifiers = { } -- we can also use this trick for devanagari - -local first_arabic, last_arabic = characters.blockrange("arabic") -local first_syriac, last_syriac = characters.blockrange("syriac") -local first_mandiac, last_mandiac = characters.blockrange("mandiac") -local first_nko, last_nko = characters.blockrange("nko") - -table.setmetatableindex(classifiers,function(t,k) - local c = chardata[k] - local v = false - if c then - local arabic = c.arabic - if arabic then - v = mappers[arabic] - if not v then - log.report("analyze","error in mapping arabic %C",k) - -- error - v = false - end - elseif k >= first_arabic and k <= last_arabic or k >= first_syriac and k <= last_syriac or - k >= first_mandiac and k <= last_mandiac or k >= first_nko and k <= last_nko then - if categories[k] == "mn" then - v = s_mark - else - v = s_rest - end - else - end - end - t[k] = v - return v -end) - -function methods.arab(head,font,attr) - local first, last = nil, nil - local c_first, c_last = nil, nil - local current, done = head, false - while current do - local id = current.id - if id == glyph_code and current.font == font and current.subtype<256 and not current[a_state] then - done = true - local char = current.char - local classifier = classifiers[char] - if not classifier then - if last then - if c_last == s_medi or c_last == s_fina then - last[a_state] = s_fina - else - warning(last,"fina") - last[a_state] = s_error - end - first, last = nil, nil - elseif first then - if c_first == s_medi or c_first == s_fina then - first[a_state] = s_isol - else - warning(first,"isol") - first[a_state] = s_error - end - first = nil - end - elseif classifier == s_mark then - current[a_state] = s_mark - elseif classifier == s_isol then - if last then - if c_last == s_medi or c_last == s_fina then - last[a_state] = s_fina - else - warning(last,"fina") - last[a_state] = s_error - end - first, last = nil, nil - elseif first then - if c_first == s_medi or c_first == s_fina then - first[a_state] = s_isol - else - warning(first,"isol") - first[a_state] = s_error - end - first = nil - end - current[a_state] = s_isol - elseif classifier == s_medi then - if first then - last = current - c_last = classifier - current[a_state] = s_medi - else - current[a_state] = s_init - first = current - c_first = classifier - end - elseif classifier == s_fina then - if last then - if last[a_state] ~= s_init then - last[a_state] = s_medi - end - current[a_state] = s_fina - first, last = nil, nil - elseif first then - -- if first[a_state] ~= s_init then - -- -- needs checking - -- first[a_state] = s_medi - -- end - current[a_state] = s_fina - first = nil - else - current[a_state] = s_isol - end - else -- classifier == s_rest - current[a_state] = s_rest - if last then - if c_last == s_medi or c_last == s_fina then - last[a_state] = s_fina - else - warning(last,"fina") - last[a_state] = s_error - end - first, last = nil, nil - elseif first then - if c_first == s_medi or c_first == s_fina then - first[a_state] = s_isol - else - warning(first,"isol") - first[a_state] = s_error - end - first = nil - end - end - else - if last then - if c_last == s_medi or c_last == s_fina then - last[a_state] = s_fina - else - warning(last,"fina") - last[a_state] = s_error - end - first, last = nil, nil - elseif first then - if c_first == s_medi or c_first == s_fina then - first[a_state] = s_isol - else - warning(first,"isol") - first[a_state] = s_error - end - first = nil - end - if id == math_code then -- a bit duplicate as we test for glyphs twice - current = end_of_math(current) - end - end - current = current.next - end - if last then - if c_last == s_medi or c_last == s_fina then - last[a_state] = s_fina - else - warning(last,"fina") - last[a_state] = s_error - end - elseif first then - if c_first == s_medi or c_first == s_fina then - first[a_state] = s_isol - else - warning(first,"isol") - first[a_state] = s_error - end - end - return head, done -end - -methods.syrc = methods.arab -methods.mand = methods.arab -methods.nko = methods.arab - -directives.register("otf.analyze.useunicodemarks",function(v) - analyzers.useunicodemarks = v -end) |