diff options
Diffstat (limited to 'tex/context/base/math-noa.lua')
| -rw-r--r-- | tex/context/base/math-noa.lua | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/tex/context/base/math-noa.lua b/tex/context/base/math-noa.lua index e7258b1ca..e57f013ca 100644 --- a/tex/context/base/math-noa.lua +++ b/tex/context/base/math-noa.lua @@ -35,6 +35,7 @@ local trace_processing = false trackers.register("math.processing", functio local trace_analyzing = false trackers.register("math.analyzing", function(v) trace_analyzing = v end) local trace_normalizing = false trackers.register("math.normalizing", function(v) trace_normalizing = v end) local trace_goodies = false trackers.register("math.goodies", function(v) trace_goodies = v end) +local trace_variants = false trackers.register("math.variants", function(v) trace_variants = v end) local check_coverage = true directives.register("math.checkcoverage", function(v) check_coverage = v end) @@ -42,6 +43,7 @@ local report_processing = logs.reporter("mathematics","processing") local report_remapping = logs.reporter("mathematics","remapping") local report_normalizing = logs.reporter("mathematics","normalizing") local report_goodies = logs.reporter("mathematics","goodies") +local report_variants = logs.reporter("mathematics","variants") local set_attribute = node.set_attribute local has_attribute = node.has_attribute @@ -684,6 +686,66 @@ function handlers.families(head,style,penalties) return true end +-- variants + +local variants = { } + +local validvariants = { -- fast check on valid + [0x2229] = 0xFE00, [0x222A] = 0xFE00, + [0x2268] = 0xFE00, [0x2269] = 0xFE00, + [0x2272] = 0xFE00, [0x2273] = 0xFE00, + [0x228A] = 0xFE00, [0x228B] = 0xFE00, + [0x2293] = 0xFE00, [0x2294] = 0xFE00, + [0x2295] = 0xFE00, + [0x2297] = 0xFE00, + [0x229C] = 0xFE00, + [0x22DA] = 0xFE00, [0x22DB] = 0xFE00, + [0x2A3C] = 0xFE00, [0x2A3D] = 0xFE00, + [0x2A9D] = 0xFE00, [0x2A9E] = 0xFE00, + [0x2AAC] = 0xFE00, [0x2AAD] = 0xFE00, + [0x2ACB] = 0xFE00, [0x2ACC] = 0xFE00, +} + +variants[math_char] = function(pointer,what,n,parent) -- also set export value + local char = pointer.char + local selector = validvariants[char] + if selector then + local next = parent.next + if next and next.id == math_noad then + local nucleus = next.nucleus + if nucleus and nucleus.id == math_char and nucleus.char == selector then + local variant + local tfmdata = fontdata[font_of_family(pointer.fam)] -- we can also have a famdata + local mathvariants = tfmdata.resources.variants -- and variantdata + if mathvariants then + mathvariants = mathvariants[selector] + if mathvariants then + variant = mathvariants[char] + end + end + if variant then + pointer.char = variant + set_attribute(pointer,exportstatus,char) -- we don't export the variant as it's visual markup + if trace_variants then + report_variants("variant (U+%05X,U+%05X) replaced by U+%05X",char,selector,variant) + end + else + if trace_variants then + report_variants("no variant (U+%05X,U+%05X)",char,selector) + end + end + next.prev = pointer + parent.next = next.next + node.free(next) + end + end + end +end + +function handlers.variants(head,style,penalties) + processnoads(head,variants,"unicode variant") + return true +end -- the normal builder |