From 8c1f7905e092398b7ff88a4fd6aa5157a6f47c74 Mon Sep 17 00:00:00 2001
From: Philipp Gesang <phg@phi-gamma.net>
Date: Tue, 19 Apr 2016 20:12:13 +0200
Subject: [features] cull legacy feature handler
---
src/luaotfload-features.lua | 146 +-------------------------------------------
1 file changed, 1 insertion(+), 145 deletions(-)
(limited to 'src')
diff --git a/src/luaotfload-features.lua b/src/luaotfload-features.lua
index 9c28fa1..5e9bf7b 100644
--- a/src/luaotfload-features.lua
+++ b/src/luaotfload-features.lua
@@ -1322,146 +1322,6 @@ local noflags = { false, false, false, false }
local tohash = table.tohash
-local function ancient_addfeature (data, feature, specifications)
- local descriptions = data.descriptions
- local resources = data.resources
- local lookups = resources.lookups
- local gsubfeatures = resources.features.gsub
- if gsubfeatures and gsubfeatures[feature] then
- -- already present
- else
- local sequences = resources.sequences
- local fontfeatures = resources.features
- local unicodes = resources.unicodes
- local lookuptypes = resources.lookuptypes
- local splitter = lpeg.splitter(" ",unicodes)
- local done = 0
- local skip = 0
- if not specifications[1] then
- -- so we accept a one entry specification
- specifications = { specifications }
- end
- -- subtables are tables themselves but we also accept flattened singular subtables
- for s=1,#specifications do
- local specification = specifications[s]
- local valid = specification.valid
- if not valid or valid(data,specification,feature) then
- local initialize = specification.initialize
- if initialize then
- -- when false is returned we initialize only once
- specification.initialize = initialize(specification) and initialize or nil
- end
- local askedfeatures = specification.features or everywhere
- local subtables = specification.subtables or { specification.data } or { }
- local featuretype = types[specification.type or "substitution"]
- local featureflags = specification.flags or noflags
- local featureorder = specification.order or { feature }
- local added = false
- local featurename = stringformat("ctx_%s_%s",feature,s)
- local st = { }
- for t=1,#subtables do
- local list = subtables[t]
- local full = stringformat("%s_%s",featurename,t)
- st[t] = full
- if featuretype == "gsub_ligature" then
- lookuptypes[full] = "ligature"
- for code, ligature in next, list do
- local unicode = tonumber(code) or unicodes[code]
- local description = descriptions[unicode]
- if description then
- local slookups = description.slookups
- if type(ligature) == "string" then
- ligature = { lpegmatch(splitter,ligature) }
- end
- local present = true
- for i=1,#ligature do
- if not descriptions[ligature[i]] then
- present = false
- break
- end
- end
- if present then
- if slookups then
- slookups[full] = ligature
- else
- description.slookups = { [full] = ligature }
- end
- done, added = done + 1, true
- else
- skip = skip + 1
- end
- end
- end
- elseif featuretype == "gsub_single" then
- lookuptypes[full] = "substitution"
- for code, replacement in next, list do
- local unicode = tonumber(code) or unicodes[code]
- local description = descriptions[unicode]
- if description then
- local slookups = description.slookups
- replacement = tonumber(replacement) or unicodes[replacement]
- if descriptions[replacement] then
- if slookups then
- slookups[full] = replacement
- else
- description.slookups = { [full] = replacement }
- end
- done, added = done + 1, true
- end
- end
- end
- end
- end
- if added then
- -- script = { lang1, lang2, lang3 } or script = { lang1 = true, ... }
- for k, v in next, askedfeatures do
- if v[1] then
- askedfeatures[k] = tabletohash(v)
- end
- end
- local sequence = {
- chain = 0,
- features = { [feature] = askedfeatures },
- flags = featureflags,
- name = featurename,
- order = featureorder,
- subtables = st,
- type = featuretype,
- }
- if specification.prepend then
- insert(sequences,1,sequence)
- else
- insert(sequences,sequence)
- end
- -- register in metadata (merge as there can be a few)
- if not gsubfeatures then
- gsubfeatures = { }
- fontfeatures.gsub = gsubfeatures
- end
- local k = gsubfeatures[feature]
- if not k then
- k = { }
- gsubfeatures[feature] = k
- end
- for script, languages in next, askedfeatures do
- local kk = k[script]
- if not kk then
- kk = { }
- k[script] = kk
- end
- for language, value in next, languages do
- kk[language] = value
- end
- end
- end
- end
- end
- if trace_loading then
- report_otf("registering feature %a, affected glyphs %a, skipped glyphs %a",feature,done,skip)
- end
- end
-end
-
local function current_addfeature(data,feature,specifications)
local descriptions = data.descriptions
local resources = data.resources
@@ -1897,11 +1757,7 @@ return {
end
otf = fonts.handlers.otf
-
- --- hack for backwards compat with TL2014 loader
- otf.enhancers.addfeature = otf.version < 2.8 and ancient_addfeature
- or current_addfeature
-
+ otf.enhancers.addfeature = current_addfeature
otf.enhancers.register ("check extra features",
install_extra_features)
--
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