diff options
Diffstat (limited to 'tex/context/base/mkiv/font-txt.lua')
| -rw-r--r-- | tex/context/base/mkiv/font-txt.lua | 532 |
1 files changed, 268 insertions, 264 deletions
diff --git a/tex/context/base/mkiv/font-txt.lua b/tex/context/base/mkiv/font-txt.lua index 20f290ddb..c52878ca7 100644 --- a/tex/context/base/mkiv/font-txt.lua +++ b/tex/context/base/mkiv/font-txt.lua @@ -247,303 +247,307 @@ end -- users do that. On the other hand, we do support longer glyph runs in both modes -- so there we gain a bit. -local function texthandler(head,font,attr,rlmode,handler,startspacing,stopspacing,nesting) - if not head then - return - end - if startspacing == nil then - startspacing = false - end - if stopspacing == nil then - stopspacing = false - end +do - if getid(head) == par_code and start_of_par(head) then - rlmode = pardirstate(head) - elseif rlmode == righttoleft_code then - rlmode = -1 - else - rlmode = 0 - end - - local dirstack = { } - local rlparmode = 0 - local topstack = 0 - local text = { } - local size = 0 - local current = head - local start = nil - local stop = nil - local startrlmode = rlmode + local function texthandler(head,font,dynamic,rlmode,handler,startspacing,stopspacing,nesting) + if not head then + return + end + if startspacing == nil then + startspacing = false + end + if stopspacing == nil then + stopspacing = false + end - local function handle(leading,trailing) -- what gets passed can become configureable: e.g. utf 8 - local stop = current or start -- hm, what with outer stop - if getid(stop) ~= glyph_code then - stop = getprev(stop) + if getid(head) == par_code and start_of_par(head) then + rlmode = pardirstate(head) + elseif rlmode == righttoleft_code then + rlmode = -1 + else + rlmode = 0 end - head = handler(head,font,attr,rlmode,start,stop,text,leading,trailing) -- handler can adapt text - size = 0 - text = { } - start = nil - end - while current do - local char, id = ischar(current,font) - if char then - if not start then - start = current - startrlmode = rlmode - end - local char = getchar(current) - size = size + 1 - text[size] = char - current = getnext(current) - elseif char == false then - -- so a mixed font - if start and size > 0 then - handle(startspacing,false) + local dirstack = { } + local rlparmode = 0 + local topstack = 0 + local text = { } + local size = 0 + local current = head + local start = nil + local stop = nil + local startrlmode = rlmode + + local function handle(leading,trailing) -- what gets passed can become configureable: e.g. utf 8 + local stop = current or start -- hm, what with outer stop + if getid(stop) ~= glyph_code then + stop = getprev(stop) end - startspacing = false - current = getnext(current) - elseif id == glue_code then - -- making this branch optional i.e. always use the else doesn't really - -- make a difference in performance (in hb) .. tricky anyway as we can - local width = getwidth(current) - if width > 0 then - if start and size > 0 then - handle(startspacing,true) + head = handler(head,font,dynamic,rlmode,start,stop,text,leading,trailing) -- handler can adapt text + size = 0 + text = { } + start = nil + end + + while current do + local char, id = ischar(current,font) + if char then + if not start then + start = current + startrlmode = rlmode end - startspacing = true - stopspacing = false - else + local char = getchar(current) + size = size + 1 + text[size] = char + current = getnext(current) + elseif char == false then + -- so a mixed font if start and size > 0 then - head = handle(startspacing) + handle(startspacing,false) end startspacing = false - stopspacing = false - end - current = getnext(current) - elseif id == disc_code and usesfont(current,font) then -- foo|-|bar : has hbox - -- This looks much like the original code but I don't see a need to optimize - -- for e.g. deva or r2l fonts. If there are no disc nodes then we won't see - -- this branch anyway and if there are, we should just deal with them. - -- - -- There is still some weird code here ... start/stop and such. When I'm in - -- the mood (or see a need) I'll rewrite this bit. + current = getnext(current) + elseif id == glue_code then + -- making this branch optional i.e. always use the else doesn't really + -- make a difference in performance (in hb) .. tricky anyway as we can + local width = getwidth(current) + if width > 0 then + if start and size > 0 then + handle(startspacing,true) + end + startspacing = true + stopspacing = false + else + if start and size > 0 then + head = handle(startspacing) + end + startspacing = false + stopspacing = false + end + current = getnext(current) + elseif id == disc_code and usesfont(current,font) then -- foo|-|bar : has hbox + -- This looks much like the original code but I don't see a need to optimize + -- for e.g. deva or r2l fonts. If there are no disc nodes then we won't see + -- this branch anyway and if there are, we should just deal with them. + -- + -- There is still some weird code here ... start/stop and such. When I'm in + -- the mood (or see a need) I'll rewrite this bit. - -- bug: disc in last word moves to end (in practice not an issue as one - -- doesn't want a break there) + -- bug: disc in last word moves to end (in practice not an issue as one + -- doesn't want a break there) - local pre = nil - local post = nil - local currentnext = getnext(current) - local current_pre, current_post, current_replace = getdisc(current) - setdisc(current) -- why, we set it later - if start then - pre = copy_node_list(start,current) - stop = getprev(current) - -- why also current and not: - -- pre = copy_node_list(start,stop) - if start == head then - head = current + local pre = nil + local post = nil + local currentnext = getnext(current) + local current_pre, current_post, current_replace = getdisc(current) + setdisc(current) -- why, we set it later + if start then + pre = copy_node_list(start,current) + stop = getprev(current) + -- why also current and not: + -- pre = copy_node_list(start,stop) + if start == head then + head = current + end + setlink(getprev(start),current) + setlink(stop,current_pre) + current_pre = start + setprev(current_pre) + start = nil + stop = nil + startrlmode = rlmode end - setlink(getprev(start),current) - setlink(stop,current_pre) - current_pre = start - setprev(current_pre) - start = nil - stop = nil - startrlmode = rlmode - end - while currentnext do - local char, id = ischar(currentnext,font) - if char or id == disc_code then - stop = currentnext - currentnext = getnext(currentnext) - elseif id == glue_code then - local width = getwidth(currentnext) - if width and width > 0 then - stopspacing = true + while currentnext do + local char, id = ischar(currentnext,font) + if char or id == disc_code then + stop = currentnext + currentnext = getnext(currentnext) + elseif id == glue_code then + local width = getwidth(currentnext) + if width and width > 0 then + stopspacing = true + else + stopspacing = false + end + break else - stopspacing = false + break end - break - else - break end - end - if stop then - local currentnext = getnext(current) - local stopnext = getnext(stop) - post = copy_node_list(currentnext,stopnext) - if current_post then - setlink(find_node_tail(current_post),currentnext) - else - setprev(currentnext) - current_post = currentnext + if stop then + local currentnext = getnext(current) + local stopnext = getnext(stop) + post = copy_node_list(currentnext,stopnext) + if current_post then + setlink(find_node_tail(current_post),currentnext) + else + setprev(currentnext) + current_post = currentnext + end + setlink(current,stopnext) + setnext(stop) + stop = nil end - setlink(current,stopnext) - setnext(stop) - stop = nil - end - if pre then - setlink(find_node_tail(pre),current_replace) - current_replace = pre - pre = nil - end - if post then - if current_replace then - setlink(find_node_tail(current_replace),post) - else - current_replace = post + if pre then + setlink(find_node_tail(pre),current_replace) + current_replace = pre + pre = nil end - post = nil - end - size = 0 -- hm, ok, start is also nil now - text = { } - if current_pre then - current_pre = texthandler(current_pre,font,attr,rlmode,handler,startspacing,false,"pre") - end - if current_post then - current_post = texthandler(current_post,font,attr,rlmode,handler,false,stopspacing,"post") - end - if current_replace then - current_replace = texthandler(current_replace,font,attr,rlmode,handler,startspacing,stopspacing,"replace") - end - startspacing = false - stopspacing = false - local cpost = current_post and find_node_tail(current_post) - local creplace = current_replace and find_node_tail(current_replace) - local cpostnew = nil - local creplacenew = nil - local newcurrent = nil - while cpost and equalnode(cpost,creplace) do - cpostnew = cpost - creplacenew = creplace - if creplace then - creplace = getprev(creplace) + if post then + if current_replace then + setlink(find_node_tail(current_replace),post) + else + current_replace = post + end + post = nil end - cpost = getprev(cpost) - end - if cpostnew then - if cpostnew == current_post then - current_post = nil - else - setnext(getprev(cpostnew)) + size = 0 -- hm, ok, start is also nil now + text = { } + if current_pre then + current_pre = texthandler(current_pre,font,dynamic,rlmode,handler,startspacing,false,"pre") end - flush_list(cpostnew) - if creplacenew == current_replace then - current_replace = nil - else - setnext(getprev(creplacenew)) + if current_post then + current_post = texthandler(current_post,font,dynamic,rlmode,handler,false,stopspacing,"post") end - local c = getnext(current) - setlink(current,creplacenew) - local creplacenewtail = find_node_tail(creplacenew) - setlink(creplacenewtail,c) - newcurrent = creplacenewtail - end - current_post = current_post and deletedisc(current_post) - current_replace = current_replace and deletedisc(current_replace) - local cpre = current_pre - local creplace = current_replace - local cprenew = nil - local creplacenew = nil - while cpre and equalnode(cpre, creplace) do - cprenew = cpre - creplacenew = creplace - if creplace then - creplace = getnext(creplace) + if current_replace then + current_replace = texthandler(current_replace,font,dynamic,rlmode,handler,startspacing,stopspacing,"replace") end - cpre = getnext(cpre) - end - if cprenew then - cpre = current_pre - current_pre = getnext(cprenew) - if current_pre then - setprev(current_pre) + startspacing = false + stopspacing = false + local cpost = current_post and find_node_tail(current_post) + local creplace = current_replace and find_node_tail(current_replace) + local cpostnew = nil + local creplacenew = nil + local newcurrent = nil + while cpost and equalnode(cpost,creplace) do + cpostnew = cpost + creplacenew = creplace + if creplace then + creplace = getprev(creplace) + end + cpost = getprev(cpost) end - setnext(cprenew) - flush_list(cpre) - creplace = current_replace - current_replace = getnext(creplacenew) - if current_replace then - setprev(current_replace) + if cpostnew then + if cpostnew == current_post then + current_post = nil + else + setnext(getprev(cpostnew)) + end + flush_list(cpostnew) + if creplacenew == current_replace then + current_replace = nil + else + setnext(getprev(creplacenew)) + end + local c = getnext(current) + setlink(current,creplacenew) + local creplacenewtail = find_node_tail(creplacenew) + setlink(creplacenewtail,c) + newcurrent = creplacenewtail end - setlink(getprev(current),creplace) - if current == head then - head = creplace + current_post = current_post and deletedisc(current_post) + current_replace = current_replace and deletedisc(current_replace) + local cpre = current_pre + local creplace = current_replace + local cprenew = nil + local creplacenew = nil + while cpre and equalnode(cpre, creplace) do + cprenew = cpre + creplacenew = creplace + if creplace then + creplace = getnext(creplace) + end + cpre = getnext(cpre) end - setlink(creplacenew,current) - end - setdisc(current,current_pre,current_post,current_replace) - current = currentnext - else - if start and size > 0 then - handle(startspacing,stopspacing) - end - startspacing = false - stopspacing = false - if id == math_code then - current = getnext(end_of_math(current)) - elseif id == dir_code then - startspacing = false - topstack, rlmode = txtdirstate(current,dirstack,topstack,rlparmode) - current = getnext(current) - -- elseif id == par_code and start_of_par(current) then - -- startspacing = false - -- rlparmode, rlmode = pardirstate(current) - -- current = getnext(current) + if cprenew then + cpre = current_pre + current_pre = getnext(cprenew) + if current_pre then + setprev(current_pre) + end + setnext(cprenew) + flush_list(cpre) + creplace = current_replace + current_replace = getnext(creplacenew) + if current_replace then + setprev(current_replace) + end + setlink(getprev(current),creplace) + if current == head then + head = creplace + end + setlink(creplacenew,current) + end + setdisc(current,current_pre,current_post,current_replace) + current = currentnext else - current = getnext(current) + if start and size > 0 then + handle(startspacing,stopspacing) + end + startspacing = false + stopspacing = false + if id == math_code then + current = getnext(end_of_math(current)) + elseif id == dir_code then + startspacing = false + topstack, rlmode = txtdirstate(current,dirstack,topstack,rlparmode) + current = getnext(current) + -- elseif id == par_code and start_of_par(current) then + -- startspacing = false + -- rlparmode, rlmode = pardirstate(current) + -- current = getnext(current) + else + current = getnext(current) + end end end + if start and size > 0 then + handle(startspacing,stopspacing) + end + return head, true end - if start and size > 0 then - handle(startspacing,stopspacing) - end - return head, true -end -function fonts.handlers.otf.texthandler(head,font,attr,direction,action) - if action then - return texthandler(head,font,attr,direction == righttoleft_code and -1 or 0,action) - else - return head, false + function fonts.handlers.otf.texthandler(head,font,dynamic,direction,action) + if action then + return texthandler(head,font,dynamic,direction == righttoleft_code and -1 or 0,action) + else + return head, false + end end -end --- Next comes a tracer plug into context. + -- Next comes a tracer plug into context. -local texthandler = fonts.handlers.otf.texthandler -local report_text = logs.reporter("otf plugin","text") -local nofruns = 0 -local nofsnippets = 0 -local f_unicode = string.formatters["%U"] + ----- texthandler = fonts.handlers.otf.texthandler + local report_text = logs.reporter("otf plugin","text") + local nofruns = 0 + local nofsnippets = 0 + local f_unicode = string.formatters["%U"] -local function showtext(head,font,attr,rlmode,start,stop,list,before,after) - if list then - nofsnippets = nofsnippets + 1 - local plus = { } - for i=1,#list do - local u = list[i] - list[i] = utfchar(u) - plus[i] = f_unicode(u) + local function showtext(head,font,dynamic,rlmode,start,stop,list,before,after) + if list then + nofsnippets = nofsnippets + 1 + local plus = { } + for i=1,#list do + local u = list[i] + list[i] = utfchar(u) + plus[i] = f_unicode(u) + end + report_text("%03i : [%s] %t [%s]-> % t", nofsnippets, before and "+" or "-", list, after and "+" or "-", plus) + else + report_text() + report_text("invalid list") + report_text() end - report_text("%03i : [%s] %t [%s]-> % t", nofsnippets, before and "+" or "-", list, after and "+" or "-", plus) - else - report_text() - report_text("invalid list") - report_text() + return head, false end - return head, false -end -fonts.handlers.otf.registerplugin("text",function(head,font,attr,direction) - nofruns = nofruns + 1 - nofsnippets = 0 - report_text("start run %i",nofruns) - local h, d = texthandler(head,font,attr,direction,showtext) - report_text("stop run %i",nofruns) - return h, d -end) + fonts.handlers.otf.registerplugin("text",function(head,font,dynamic,direction) + nofruns = nofruns + 1 + nofsnippets = 0 + report_text("start run %i",nofruns) + local h, d = texthandler(head,font,dynamic,direction,showtext) + report_text("stop run %i",nofruns) + return h, d + end) + +end |