diff options
Diffstat (limited to 'tex/context/base/page-mix.lua')
| -rw-r--r-- | tex/context/base/page-mix.lua | 71 |
1 files changed, 65 insertions, 6 deletions
diff --git a/tex/context/base/page-mix.lua b/tex/context/base/page-mix.lua index 0fbaa4e30..2695d915b 100644 --- a/tex/context/base/page-mix.lua +++ b/tex/context/base/page-mix.lua @@ -14,6 +14,7 @@ if not modules then modules = { } end modules ["page-mix"] = { -- local number, table = number, table local concat = table.concat +local ceil, floor = math.ceil, math.floor local trace_state = false trackers.register("mixedcolumns.trace", function(v) trace_state = v end) local trace_detail = false trackers.register("mixedcolumns.detail", function(v) trace_detail = v end) @@ -81,6 +82,7 @@ local v_auto = variables.auto local v_none = variables.none local v_more = variables.more local v_less = variables.less +local v_halfline = variables.halfline pagebuilders = pagebuilders or { } pagebuilders.mixedcolumns = pagebuilders.mixedcolumns or { } @@ -718,8 +720,10 @@ end function mixedcolumns.finalize(result) if result then - local results = result.results - for i=1,result.nofcolumns do + local results = result.results + local columns = result.nofcolumns + local maxtotal = 0 + for i=1,columns do local r = results[i] local h = r.head if h then @@ -747,6 +751,16 @@ function mixedcolumns.finalize(result) r.inserts[c] = t end end + local total = r.height + r.depth + if total > maxtotal then + maxtotal = total + end + r.total = total + end + result.maxtotal = maxtotal + for i=1,columns do + local r = results[i] + r.extra = maxtotal - r.total end end end @@ -819,13 +833,14 @@ function mixedcolumns.getsplit(result,n) local strutht = result.strutht local strutdp = result.strutdp local lineheight = strutht + strutdp + local isglobal = result.alternative == v_global local v = new_vlist() setfield(v,"list",h) -- local v = vpack(h,"exactly",height) - if result.alternative == v_global then -- option + if isglobal then -- option result.height = result.maxheight end @@ -833,11 +848,55 @@ function mixedcolumns.getsplit(result,n) local dp = 0 local wd = result.originalwidth - local grid = result.grid + local grid = result.grid + local internalgrid = result.internalgrid + local httolerance = .25 + local dptolerance = .50 + local lineheight = internalgrid == v_halfline and lineheight/2 or lineheight + + local function amount(r,s,t) + local l = ceil((r-t)/lineheight) + local a = lineheight * l + if a > s then + return a - s + else + return s + end + end if grid then - ht = lineheight * math.ceil(result.height/lineheight) - strutdp - dp = strutdp + -- print(n,result.maxtotal,r.total,r.extra) + if isglobal then + -- ht = (lineheight * ceil(result.height/lineheight) - strutdp + ht = amount(rh,strutdp,0) + dp = strutdp + else + -- natural dimensions + local rh = r.height + local rd = r.depth + if rh > ht then + ht = amount(rh,strutdp,httolerance*strutht) + end + if rd > dp then + dp = amount(rd,strutht,dptolerance*strutdp) + end + -- forced dimensions + local rh = result.height or 0 + local rd = result.depth or 0 + if rh > ht then + ht = amount(rh,strutdp,httolerance*strutht) + end + if rd > dp then + dp = amount(rd,strutht,dptolerance*strutdp) + end + -- always one line at least + if ht < strutht then + ht = strutht + end + if dp < strutdp then + dp = strutdp + end + end else ht = result.height dp = result.depth |