diff options
Diffstat (limited to 'tex/context/base/font-otn.lua')
| -rw-r--r-- | tex/context/base/font-otn.lua | 75 |
1 files changed, 72 insertions, 3 deletions
diff --git a/tex/context/base/font-otn.lua b/tex/context/base/font-otn.lua index 1b99c56de..9ccd19d75 100644 --- a/tex/context/base/font-otn.lua +++ b/tex/context/base/font-otn.lua @@ -252,9 +252,9 @@ local glue_code = nodecodes.glue local disc_code = nodecodes.disc local whatsit_code = nodecodes.whatsit local math_code = nodecodes.math +local dir_code = nodecodes.dir or whatcodes.dir +local localpar_code = nodecodes.localpar or whatcodes.localpar -local dir_code = whatcodes.dir -local localpar_code = whatcodes.localpar local discretionary_code = disccodes.discretionary local ligature_code = glyphcodes.ligature @@ -3320,7 +3320,7 @@ local function featuresprocessor(head,font,attr) comprun(start,c_run) start = getnext(start) end - elseif id == whatsit_code then -- will be function + elseif id == whatsit_code then local subtype = getsubtype(start) if subtype == dir_code then local dir = getfield(start,"dir") @@ -3359,6 +3359,41 @@ local function featuresprocessor(head,font,attr) start = getnext(start) elseif id == math_code then start = getnext(end_of_math(start)) + elseif id == dir_code then + local dir = getfield(start,"dir") + if dir == "+TLT" then + topstack = topstack + 1 + dirstack[topstack] = dir + rlmode = 1 + elseif dir == "+TRT" then + topstack = topstack + 1 + dirstack[topstack] = dir + rlmode = -1 + elseif dir == "-TLT" or dir == "-TRT" then + topstack = topstack - 1 + rlmode = dirstack[topstack] == "+TRT" and -1 or 1 + else + rlmode = rlparmode + end + if trace_directions then + report_process("directions after txtdir %a: parmode %a, txtmode %a, # stack %a, new dir %a",dir,rlparmode,rlmode,topstack,newdir) + end + start = getnext(start) + elseif id == localpar_code then + local dir = getfield(start,"dir") + if dir == "TRT" then + rlparmode = -1 + elseif dir == "TLT" then + rlparmode = 1 + else + rlparmode = 0 + end + -- one might wonder if the par dir should be looked at, so we might as well drop the next line + rlmode = rlparmode + if trace_directions then + report_process("directions after pardir %a: parmode %a, txtmode %a",dir,rlparmode,rlmode) + end + start = getnext(start) else start = getnext(start) end @@ -3630,6 +3665,40 @@ local function featuresprocessor(head,font,attr) start = getnext(start) elseif id == math_code then start = getnext(end_of_math(start)) + elseif id == dir_code then + local dir = getfield(start,"dir") + if dir == "+TLT" then + topstack = topstack + 1 + dirstack[topstack] = dir + rlmode = 1 + elseif dir == "+TRT" then + topstack = topstack + 1 + dirstack[topstack] = dir + rlmode = -1 + elseif dir == "-TLT" or dir == "-TRT" then + topstack = topstack - 1 + rlmode = dirstack[topstack] == "+TRT" and -1 or 1 + else + rlmode = rlparmode + end + if trace_directions then + report_process("directions after txtdir %a: parmode %a, txtmode %a, # stack %a, new dir %a",dir,rlparmode,rlmode,topstack,newdir) + end + start = getnext(start) + elseif id == localpar_code then + local dir = getfield(start,"dir") + if dir == "TRT" then + rlparmode = -1 + elseif dir == "TLT" then + rlparmode = 1 + else + rlparmode = 0 + end + rlmode = rlparmode + if trace_directions then + report_process("directions after pardir %a: parmode %a, txtmode %a",dir,rlparmode,rlmode) + end + start = getnext(start) else start = getnext(start) end |