diff options
Diffstat (limited to 'tex/context/base/spac-ver.lua')
| -rw-r--r-- | tex/context/base/spac-ver.lua | 199 |
1 files changed, 164 insertions, 35 deletions
diff --git a/tex/context/base/spac-ver.lua b/tex/context/base/spac-ver.lua index 7d78d6c12..3f1fd5c82 100644 --- a/tex/context/base/spac-ver.lua +++ b/tex/context/base/spac-ver.lua @@ -8,7 +8,8 @@ if not modules then modules = { } end modules ['spac-ver'] = { -- we also need to call the spacer for inserts! --- todo: directly set skips +-- todo: use lua nodes with lua data (>0.79) +-- see ** can go when 0.79 -- this code dates from the beginning and is kind of experimental; it -- will be optimized and improved soon @@ -120,8 +121,8 @@ builders.vspacing = vspacing local vspacingdata = vspacing.data or { } vspacing.data = vspacingdata -vspacingdata.snapmethods = vspacingdata.snapmethods or { } -local snapmethods = vspacingdata.snapmethods --maybe some older code can go +local snapmethods = vspacingdata.snapmethods or { } +vspacingdata.snapmethods = snapmethods storage.register("builders/vspacing/data/snapmethods", snapmethods, "builders.vspacing.data.snapmethods") @@ -535,14 +536,15 @@ local categories = allocate { [5] = 'disable', [6] = 'nowhite', [7] = 'goback', - [8] = 'together' + [8] = 'together', -- not used (?) + [9] = 'overlay', } vspacing.categories = categories function vspacing.tocategories(str) local t = { } - for s in gmatch(str,"[^, ]") do + for s in gmatch(str,"[^, ]") do -- use lpeg instead local n = tonumber(s) if n then t[categories[n]] = true @@ -553,7 +555,7 @@ function vspacing.tocategories(str) return t end -function vspacing.tocategory(str) +function vspacing.tocategory(str) -- can be optimized if type(str) == "string" then return set.tonumber(vspacing.tocategories(str)) else @@ -584,15 +586,15 @@ do -- todo: interface.variables -- This will change: just node.write and we can store the values in skips which -- then obeys grouping - local fixedblankskip = context.fixedblankskip - local flexibleblankskip = context.flexibleblankskip - local setblankcategory = context.setblankcategory - local setblankorder = context.setblankorder - local setblankpenalty = context.setblankpenalty - local setblankhandling = context.setblankhandling - local flushblankhandling = context.flushblankhandling - local addpredefinedblankskip = context.addpredefinedblankskip - local addaskedblankskip = context.addaskedblankskip + local ctx_fixedblankskip = context.fixedblankskip + local ctx_flexibleblankskip = context.flexibleblankskip + local ctx_setblankcategory = context.setblankcategory + local ctx_setblankorder = context.setblankorder + local ctx_setblankpenalty = context.setblankpenalty + ----- ctx_setblankhandling = context.setblankhandling + local ctx_flushblankhandling = context.flushblankhandling + local ctx_addpredefinedblankskip = context.addpredefinedblankskip + local ctx_addaskedblankskip = context.addaskedblankskip local function analyze(str,oldcategory) -- we could use shorter names for s in gmatch(str,"([^ ,]+)") do @@ -604,35 +606,35 @@ do -- todo: interface.variables if mk then category = analyze(mk,category) elseif keyword == k_fixed then - fixedblankskip() + ctx_fixedblankskip() elseif keyword == k_flexible then - flexibleblankskip() + ctx_flexibleblankskip() elseif keyword == k_category then local category = tonumber(detail) if category then - setblankcategory(category) + ctx_setblankcategory(category) if category ~= oldcategory then - flushblankhandling() + ctx_flushblankhandling() oldcategory = category end end elseif keyword == k_order and detail then local order = tonumber(detail) if order then - setblankorder(order) + ctx_setblankorder(order) end elseif keyword == k_penalty and detail then local penalty = tonumber(detail) if penalty then - setblankpenalty(penalty) + ctx_setblankpenalty(penalty) end else amount = tonumber(amount) or 1 local sk = skip[keyword] if sk then - addpredefinedblankskip(amount,keyword) + ctx_addpredefinedblankskip(amount,keyword) else -- no check - addaskedblankskip(amount,keyword) + ctx_addaskedblankskip(amount,keyword) end end end @@ -640,22 +642,22 @@ do -- todo: interface.variables return category end - local pushlogger = context.pushlogger - local startblankhandling = context.startblankhandling - local stopblankhandling = context.stopblankhandling - local poplogger = context.poplogger + local ctx_pushlogger = context.pushlogger + local ctx_startblankhandling = context.startblankhandling + local ctx_stopblankhandling = context.stopblankhandling + local ctx_poplogger = context.poplogger function vspacing.analyze(str) if trace_vspacing then - pushlogger(report_vspacing) - startblankhandling() + ctx_pushlogger(report_vspacing) + ctx_startblankhandling() analyze(str,1) - stopblankhandling() - poplogger() + ctx_stopblankhandling() + ctx_poplogger() else - startblankhandling() + ctx_startblankhandling() analyze(str,1) - stopblankhandling() + ctx_stopblankhandling() end end @@ -774,7 +776,8 @@ local splittopskip_code = skipcodes.splittopskip -- end local free_glue_node = free_node -local free_glue_spec = function() end -- free_node +local free_glue_spec = function() end +----- free_glue_spec = free_node -- can be enabled in in 0.73 (so for the moment we leak due to old luatex engine issues) function vspacing.snapbox(n,how) local sv = snapmethods[how] @@ -853,7 +856,16 @@ end -- penalty only works well when before skip -local discard, largest, force, penalty, add, disable, nowhite, goback, together = 0, 1, 2, 3, 4, 5, 6, 7, 8 -- move into function when upvalue 60 issue +local discard = 0 +local largest = 1 +local force = 2 +local penalty = 3 +local add = 4 +local disable = 5 +local nowhite = 6 +local goback = 7 +local together = 8 -- not used (?) +local overlay = 9 -- [whatsits][hlist][glue][glue][penalty] @@ -885,6 +897,108 @@ local function specialpenalty(start,penalty) end end +local function check_experimental_overlay(head,current) -- todo + local p = nil + local c = current + local n = nil + +setfield(head,"prev",nil) -- till we have 0.79 ** + + local function overlay(p, n, s, mvl) + local c = getprev(n) + while c and c ~= p do + local p = getprev(c) + free_node(c) + c = p + end + setfield(n,"prev",nil) + if not mvl then + setfield(p,"next",n) + end + local p_ht = getfield(p,"height") + local p_dp = getfield(p,"depth") + local n_ht = getfield(n,"height") + local delta = n_ht + s + p_dp + local k = new_kern(-delta) + if trace_vspacing then + report_vspacing("overlaying, prev height: %p, prev depth: %p, next height: %p, skips: %p, move up: %p",p_ht,p_dp,n_ht,s,delta) + end + if n_ht > p_ht then + -- we should adapt pagetotal ! (need a hook for that) + setfield(p,"height",n_ht) + end + return k + end + + while c do + local id = getid(c) + if id == glue_code or id == penalty_code or id == kern_code then + -- skip (actually, remove) + c = getnext(c) + elseif id == hlist_code then + n = c + break + else + break + end + end + if n then + -- we have a next line + c = current + while c do + local id = getid(c) + if id == glue_code or id == penalty_code then + c = getprev(c) + elseif id == hlist_code then + p = c + break + else + break + end + end + if not p then + if a_snapmethod == a_snapvbox then + -- quit, we're not on the mvl + else + -- messy + local c = tonut(texlists.page_head) + local s = 0 + while c do + local id = getid(c) + if id == glue_code then + if p then + s = s + getfield(getfield(c,"glue_spec"),"width") + end + elseif id == kern_code then + if p then + s = s + getfield(c,"kern") + end + elseif id == penalty_code then + -- skip (actually, remove) + elseif id == hlist_code then + p = c + s = 0 + else + p = nil + s = 0 + end + c = getnext(c) + end + if p and p ~= n then + local k = overlay(p,n,s,true) + insert_node_before(n,n,k) + return k, getnext(n) + end + end + elseif p ~= n then + local k = overlay(p,n,0,false ) + insert_node_after(p,p,k) + return head, getnext(n) + end + end + return remove_node(head, current, true) +end + local function collapser(head,where,what,trace,snap,a_snapmethod) -- maybe also pass tail if trace then reset_tracing(head) @@ -900,7 +1014,17 @@ local function collapser(head,where,what,trace,snap,a_snapmethod) -- maybe also if penalty_data then local p = new_penalty(penalty_data) if trace then trace_done("flushed due to " .. why,p) end +if penalty_data >= 10000 then -- or whatever threshold? + local prev = getprev(current) + if getid(prev) == glue_code then -- maybe go back more, or maybe even push back before any glue + -- tricky case: spacing/grid-007.tex: glue penalty glue + head = insert_node_before(head,prev,p) + else + head = insert_node_before(head,current,p) + end +else head = insert_node_before(head,current,p) +end end if glue_data then local spec = getfield(glue_data,"spec") @@ -1059,6 +1183,10 @@ local function collapser(head,where,what,trace,snap,a_snapmethod) -- maybe also elseif sc == discard then if trace then trace_skip("discard",sc,so,sp,current) end head, current = remove_node(head, current, true) + elseif sc == overlay then + -- todo (overlay following line over previous + if trace then trace_skip("overlay",sc,so,sp,current) end + head, current = check_experimental_overlay(head,current,a_snapmethod) elseif ignore_following then if trace then trace_skip("disabled",sc,so,sp,current) end head, current = remove_node(head, current, true) @@ -1403,3 +1531,4 @@ commands.vspacingdefine = vspacing.setmap commands.vspacingcollapse = vspacing.collapsevbox commands.vspacingsnap = vspacing.snapbox commands.resetprevdepth = vspacing.resetprevdepth +commands.definesnapmethod = vspacing.definesnapmethod |