diff options
Diffstat (limited to 'tex/context/base/tabl-xtb.lua')
| -rw-r--r-- | tex/context/base/tabl-xtb.lua | 1976 |
1 files changed, 988 insertions, 988 deletions
diff --git a/tex/context/base/tabl-xtb.lua b/tex/context/base/tabl-xtb.lua index 3ffe8a219..5b47bf705 100644 --- a/tex/context/base/tabl-xtb.lua +++ b/tex/context/base/tabl-xtb.lua @@ -1,988 +1,988 @@ -if not modules then modules = { } end modules ['tabl-xtb'] = { - version = 1.001, - comment = "companion to tabl-xtb.mkvi", - author = "Hans Hagen, PRAGMA-ADE, Hasselt NL", - copyright = "PRAGMA ADE / ConTeXt Development Team", - license = "see context related readme files" -} - ---[[ - -This table mechanism is a combination between TeX and Lua. We do process -cells at the TeX end and inspect them at the Lua end. After some analysis -we have a second pass using the calculated widths, and if needed cells -will go through a third pass to get the heights right. This last pass is -avoided when possible which is why some code below looks a bit more -complex than needed. The reason for such optimizations is that each cells -is actually a framed instance and because tables like this can be hundreds -of pages we want to keep processing time reasonable. - -To a large extend the behaviour is comparable with the way bTABLE/eTABLE -works and there is a module that maps that one onto this one. Eventually -this mechamism will be improved so that it can replace its older cousin. - -]]-- - --- todo: use linked list instead of r/c array - -local commands, context, tex, node = commands, context, tex, node - -local texdimen = tex.dimen -local texcount = tex.count -local texbox = tex.box -local texsetcount = tex.setcount -local texsetdimen = tex.setdimen - -local format = string.format -local concat = table.concat -local points = number.points - -local context = context -local context_beginvbox = context.beginvbox -local context_endvbox = context.endvbox -local context_blank = context.blank -local context_nointerlineskip = context.nointerlineskip - -local variables = interfaces.variables - -local setmetatableindex = table.setmetatableindex -local settings_to_hash = utilities.parsers.settings_to_hash - -local copy_node_list = node.copy_list -local hpack_node_list = node.hpack -local vpack_node_list = node.vpack -local slide_node_list = node.slide -local flush_node_list = node.flush_list - -local nodepool = nodes.pool - -local new_glue = nodepool.glue -local new_kern = nodepool.kern -local new_penalty = nodepool.penalty -local new_hlist = nodepool.hlist - -local v_stretch = variables.stretch -local v_normal = variables.normal -local v_width = variables.width -local v_height = variables.height -local v_repeat = variables["repeat"] -local v_max = variables.max -local v_fixed = variables.fixed - -local xtables = { } -typesetters.xtables = xtables - -local trace_xtable = false -local report_xtable = logs.reporter("xtable") - -trackers.register("xtable.construct", function(v) trace_xtable = v end) - -local null_mode = 0 -local head_mode = 1 -local foot_mode = 2 -local more_mode = 3 -local body_mode = 4 - -local namedmodes = { [0] = - "null", - "head", - "foot", - "next", - "body", -} - -local stack, data = { }, nil - -function xtables.create(settings) - table.insert(stack,data) - local rows = { } - local widths = { } - local heights = { } - local depths = { } - local spans = { } - local distances = { } - local autowidths = { } - local modes = { } - local fixedrows = { } - local fixedcolumns = { } - local frozencolumns = { } - local options = { } - data = { - rows = rows, - widths = widths, - heights = heights, - depths = depths, - spans = spans, - distances = distances, - modes = modes, - autowidths = autowidths, - fixedrows = fixedrows, - fixedcolumns = fixedcolumns, - frozencolumns = frozencolumns, - options = options, - nofrows = 0, - nofcolumns = 0, - currentrow = 0, - currentcolumn = 0, - settings = settings or { }, - } - local function add_zero(t,k) - t[k] = 0 - return 0 - end - local function add_table(t,k) - local v = { } - t[k] = v - return v - end - local function add_cell(row,c) - local cell = { - nx = 0, - ny = 0, - list = false, - } - row[c] = cell - if c > data.nofcolumns then - data.nofcolumns = c - end - return cell - end - local function add_row(rows,r) - local row = { } - setmetatableindex(row,add_cell) - rows[r] = row - if r > data.nofrows then - data.nofrows = r - end - return row - end - setmetatableindex(rows,add_row) - setmetatableindex(widths,add_zero) - setmetatableindex(heights,add_zero) - setmetatableindex(depths,add_zero) - setmetatableindex(distances,add_zero) - setmetatableindex(modes,add_zero) - setmetatableindex(fixedrows,add_zero) - setmetatableindex(fixedcolumns,add_zero) - setmetatableindex(options,add_table) - -- - settings.columndistance = tonumber(settings.columndistance) or 0 - settings.rowdistance = tonumber(settings.rowdistance) or 0 - settings.leftmargindistance = tonumber(settings.leftmargindistance) or 0 - settings.rightmargindistance = tonumber(settings.rightmargindistance) or 0 - settings.options = settings_to_hash(settings.option) - settings.textwidth = tonumber(settings.textwidth) or tex.hsize - settings.lineheight = tonumber(settings.lineheight) or texdimen.lineheight - settings.maxwidth = tonumber(settings.maxwidth) or settings.textwidth/8 - -- if #stack > 0 then - -- settings.textwidth = tex.hsize - -- end - data.criterium_v = 2 * data.settings.lineheight - data.criterium_h = .75 * data.settings.textwidth - -end - -function xtables.initialize_reflow_width(option) - local r = data.currentrow - local c = data.currentcolumn + 1 - local drc = data.rows[r][c] - drc.nx = texcount.c_tabl_x_nx - drc.ny = texcount.c_tabl_x_ny - local distances = data.distances - local distance = texdimen.d_tabl_x_distance - if distance > distances[c] then - distances[c] = distance - end - if option and option ~= "" then - local options = settings_to_hash(option) - data.options[r][c] = options - if options[v_fixed] then - data.frozencolumns[c] = true - end - end - data.currentcolumn = c -end - --- local function rather_fixed(n) --- for n in node. - -function xtables.set_reflow_width() - local r = data.currentrow - local c = data.currentcolumn - local rows = data.rows - local row = rows[r] - while row[c].span do -- can also be previous row ones - c = c + 1 - end - local tb = texbox.b_tabl_x - local drc = row[c] - -- - drc.list = true -- we don't need to keep the content around as we're in trial mode (no: copy_node_list(tb)) - -- - local widths, width = data.widths, tb.width - if width > widths[c] then - widths[c] = width - end - local heights, height = data.heights, tb.height - if height > heights[r] then - heights[r] = height - end - local depths, depth = data.depths, tb.depth - if depth > depths[r] then - depths[r] = depth - end - -- - local dimensionstate = texcount.frameddimensionstate - local fixedcolumns = data.fixedcolumns - local fixedrows = data.fixedrows - if dimensionstate == 1 then - if width > fixedcolumns[c] then -- how about a span here? - fixedcolumns[c] = width - end - elseif dimensionstate == 2 then - fixedrows[r] = height - elseif dimensionstate == 3 then - fixedrows[r] = height -- width - fixedcolumns[c] = width -- height - else -- probably something frozen, like an image -- we could parse the list - if width <= data.criterium_h and height >= data.criterium_v then - if width > fixedcolumns[c] then -- how about a span here? - fixedcolumns[c] = width - end - end - end - drc.dimensionstate = dimensionstate - -- - local nx, ny = drc.nx, drc.ny - if nx > 1 or ny > 1 then - local spans = data.spans - local self = true - for y=1,ny do - for x=1,nx do - if self then - self = false - else - local ry = r + y - 1 - local cx = c + x - 1 - if y > 1 then - spans[ry] = true - end - rows[ry][cx].span = true - end - end - end - c = c + nx - 1 - end - if c > data.nofcolumns then - data.nofcolumns = c - end - data.currentcolumn = c -end - -function xtables.initialize_reflow_height() - local r = data.currentrow - local c = data.currentcolumn + 1 - local rows = data.rows - local row = rows[r] - while row[c].span do -- can also be previous row ones - c = c + 1 - end - data.currentcolumn = c - local widths = data.widths - local w = widths[c] - local drc = row[c] - for x=1,drc.nx-1 do - w = w + widths[c+x] - end - texdimen.d_tabl_x_width = w - local dimensionstate = drc.dimensionstate or 0 - if dimensionstate == 1 or dimensionstate == 3 then - -- width was fixed so height is known - texcount.c_tabl_x_skip_mode = 1 - elseif dimensionstate == 2 then - -- height is enforced - texcount.c_tabl_x_skip_mode = 1 - elseif data.autowidths[c] then - -- width has changed so we need to recalculate the height - texcount.c_tabl_x_skip_mode = 0 - else - texcount.c_tabl_x_skip_mode = 1 - end -end - -function xtables.set_reflow_height() - local r = data.currentrow - local c = data.currentcolumn - local rows = data.rows - local row = rows[r] --- while row[c].span do -- we could adapt drc.nx instead --- c = c + 1 --- end - local tb = texbox.b_tabl_x - local drc = row[c] - if data.fixedrows[r] == 0 then -- and drc.dimensionstate < 2 - local heights, height = data.heights, tb.height - if height > heights[r] then - heights[r] = height - end - local depths, depth = data.depths, tb.depth - if depth > depths[r] then - depths[r] = depth - end - end --- c = c + drc.nx - 1 --- data.currentcolumn = c -end - -function xtables.initialize_construct() - local r = data.currentrow - local c = data.currentcolumn + 1 - local rows = data.rows - local row = rows[r] - while row[c].span do -- can also be previous row ones - c = c + 1 - end - data.currentcolumn = c - local widths = data.widths - local heights = data.heights - local depths = data.depths - local w = widths[c] - local h = heights[r] - local d = depths[r] - local drc = row[c] - for x=1,drc.nx-1 do - w = w + widths[c+x] - end - for y=1,drc.ny-1 do - h = h + heights[r+y] - d = d + depths[r+y] - end - texdimen.d_tabl_x_width = w - texdimen.d_tabl_x_height = h + d - texdimen.d_tabl_x_depth = 0 -end - -function xtables.set_construct() - local r = data.currentrow - local c = data.currentcolumn - local rows = data.rows - local row = rows[r] --- while row[c].span do -- can also be previous row ones --- c = c + 1 --- end - local drc = row[c] - -- this will change as soon as in luatex we can reset a box list without freeing - drc.list = copy_node_list(texbox.b_tabl_x) --- c = c + drc.nx - 1 --- data.currentcolumn = c -end - -local function showwidths(where,widths,autowidths) - local result = { } - for i=1,#widths do - result[#result+1] = format("%12s%s",points(widths[i]),autowidths[i] and "*" or " ") - end - return report_xtable("%s : %s",where,concat(result," ")) -end - -function xtables.reflow_width() - local nofrows = data.nofrows - local nofcolumns = data.nofcolumns - local rows = data.rows - for r=1,nofrows do - local row = rows[r] - for c=1,nofcolumns do - local drc = row[c] - if drc.list then - -- flush_node_list(drc.list) - drc.list = false - end - end - end - -- spread - local settings = data.settings - local options = settings.options - local maxwidth = settings.maxwidth - -- calculate width - local widths = data.widths - local distances = data.distances - local autowidths = data.autowidths - local fixedcolumns = data.fixedcolumns - local frozencolumns = data.frozencolumns - local width = 0 - local distance = 0 - local nofwide = 0 - local widetotal = 0 - local available = settings.textwidth - settings.leftmargindistance - settings.rightmargindistance - if trace_xtable then - showwidths("stage 1",widths,autowidths) - end - local noffrozen = 0 - if options[v_max] then - for c=1,nofcolumns do - width = width + widths[c] - if width > maxwidth then - autowidths[c] = true - nofwide = nofwide + 1 - widetotal = widetotal + widths[c] - end - if c < nofcolumns then - distance = distance + distances[c] - end - if frozencolumns[c] then - noffrozen = noffrozen + 1 -- brr, should be nx or so - end - end - else - for c=1,nofcolumns do -- also keep track of forced - local fixedwidth = fixedcolumns[c] - if fixedwidth > 0 then - widths[c] = fixedwidth - width = width + fixedwidth - else - width = width + widths[c] - if width > maxwidth then - autowidths[c] = true - nofwide = nofwide + 1 - widetotal = widetotal + widths[c] - end - end - if c < nofcolumns then - distance = distance + distances[c] - end - if frozencolumns[c] then - noffrozen = noffrozen + 1 -- brr, should be nx or so - end - end - end - if trace_xtable then - showwidths("stage 2",widths,autowidths) - end - local delta = available - width - distance - (nofcolumns-1) * settings.columndistance - if delta == 0 then - -- nothing to be done - if trace_xtable then - report_xtable("perfect fit") - end - elseif delta > 0 then - -- we can distribute some - if not options[v_stretch] then - -- not needed - if trace_xtable then - report_xtable("too wide but no stretch, delta %p",delta) - end - elseif options[v_width] then - local factor = delta / width - if trace_xtable then - report_xtable("proportional stretch, delta %p, width %p, factor %a",delta,width,factor) - end - for c=1,nofcolumns do - widths[c] = widths[c] + factor * widths[c] - end - else - -- frozen -> a column with option=fixed will not stretch - local extra = delta / (nofcolumns - noffrozen) - if trace_xtable then - report_xtable("normal stretch, delta %p, extra %p",delta,extra) - end - for c=1,nofcolumns do - if not frozencolumns[c] then - widths[c] = widths[c] + extra - end - end - end - elseif nofwide > 0 then - while true do - done = false - local available = (widetotal + delta) / nofwide - if trace_xtable then - report_xtable("shrink check, total %p, delta %p, columns %s, fixed %p",widetotal,delta,nofwide,available) - end - for c=1,nofcolumns do - if autowidths[c] and available >= widths[c] then - autowidths[c] = nil - nofwide = nofwide - 1 - widetotal = widetotal - widths[c] - done = true - end - end - if not done then - break - end - end - -- maybe also options[v_width] here but tricky as width does not say - -- much about amount - if options[v_width] then -- not that much (we could have a clever vpack loop balancing .. no fun) - local factor = (widetotal + delta) / width - if trace_xtable then - report_xtable("proportional shrink used, total %p, delta %p, columns %s, factor %s",widetotal,delta,nofwide,factor) - end - for c=1,nofcolumns do - if autowidths[c] then - widths[c] = factor * widths[c] - end - end - else - local available = (widetotal + delta) / nofwide - if trace_xtable then - report_xtable("normal shrink used, total %p, delta %p, columns %s, fixed %p",widetotal,delta,nofwide,available) - end - for c=1,nofcolumns do - if autowidths[c] then - widths[c] = available - end - end - end - end - if trace_xtable then - showwidths("stage 3",widths,autowidths) - end - -- - data.currentrow = 0 - data.currentcolumn = 0 -end - -function xtables.reflow_height() - data.currentrow = 0 - data.currentcolumn = 0 - local settings = data.settings - if settings.options[v_height] then - local heights = data.heights - local depths = data.depths - local nofrows = data.nofrows - local totalheight = 0 - local totaldepth = 0 - for i=1,nofrows do - totalheight = totalheight + heights[i] - totalheight = totalheight + depths [i] - end - local total = totalheight + totaldepth - local leftover = settings.textheight - total - if leftover > 0 then - local leftheight = (totalheight / total ) * leftover / #heights - local leftdepth = (totaldepth / total ) * leftover / #depths - for i=1,nofrows do - heights[i] = heights[i] + leftheight - depths [i] = depths [i] + leftdepth - end - end - end -end - -local function showspans(data) - local rows = data.rows - local modes = data.modes - local nofcolumns = data.nofcolumns - local nofrows = data.nofrows - for r=1,nofrows do - local line = { } - local row = rows[r] - for c=1,nofcolumns do - local cell =row[c] - if cell.list then - line[#line+1] = "list" - elseif cell.span then - line[#line+1] = "span" - else - line[#line+1] = "none" - end - end - report_xtable("%3d : %s : % t",r,namedmodes[modes[r]] or "----",line) - end -end - -function xtables.construct() - local rows = data.rows - local heights = data.heights - local depths = data.depths - local widths = data.widths - local spans = data.spans - local distances = data.distances - local modes = data.modes - local settings = data.settings - local nofcolumns = data.nofcolumns - local nofrows = data.nofrows - local columndistance = settings.columndistance - local rowdistance = settings.rowdistance - local leftmargindistance = settings.leftmargindistance - local rightmargindistance = settings.rightmargindistance - -- ranges can be mixes so we collect - - if trace_xtable then - showspans(data) - end - - local ranges = { - [head_mode] = { }, - [foot_mode] = { }, - [more_mode] = { }, - [body_mode] = { }, - } - for r=1,nofrows do - local m = modes[r] - if m == 0 then - m = body_mode - end - local range = ranges[m] - range[#range+1] = r - end - -- todo: hook in the splitter ... the splitter can ask for a chunk of - -- a certain size ... no longer a split memory issue then and header - -- footer then has to happen here too .. target height - local function packaged_column(r) - local row = rows[r] - local start = nil - local stop = nil - if leftmargindistance > 0 then - start = new_kern(leftmargindistance) - stop = start - end - local hasspan = false - for c=1,nofcolumns do - local drc = row[c] - if not hasspan then - hasspan = drc.span - end - local list = drc.list - if list then - list.shift = list.height + list.depth - -- list = hpack_node_list(list) -- is somehow needed - -- list.width = 0 - -- list.height = 0 - -- list.depth = 0 - -- faster: - local h = new_hlist() - h.list = list - list = h - -- - if start then - stop.next = list - list.prev = stop - else - start = list - end - stop = list -- one node anyway, so not needed: slide_node_list(list) - end - local step = widths[c] - if c < nofcolumns then - step = step + columndistance + distances[c] - end - local kern = new_kern(step) - if stop then - stop.prev = kern - stop.next = kern - else -- can be first spanning next row (ny=...) - start = kern - end - stop = kern - end - if start then - if rightmargindistance > 0 then - local kern = new_kern(rightmargindistance) - stop.next = kern - kern.prev = stop - -- stop = kern - end - return start, heights[r] + depths[r], hasspan - end - end - local function collect_range(range) - local result, nofr = { }, 0 - local nofrange = #range - for i=1,#range do - local r = range[i] - -- local row = rows[r] - local list, size, hasspan = packaged_column(r) - if list then - if hasspan and nofr > 0 then - result[nofr][4] = true - end - nofr = nofr + 1 - result[nofr] = { - hpack_node_list(list), - size, - i < nofrange and rowdistance > 0 and rowdistance or false, -- might move - false - } - end - end - return result - end - local body = collect_range(ranges[body_mode]) - data.results = { - [head_mode] = collect_range(ranges[head_mode]), - [foot_mode] = collect_range(ranges[foot_mode]), - [more_mode] = collect_range(ranges[more_mode]), - [body_mode] = body, - } - if #body == 0 then - texsetcount("global","c_tabl_x_state",0) - texsetdimen("global","d_tabl_x_final_width",0) - else - texsetcount("global","c_tabl_x_state",1) - texsetdimen("global","d_tabl_x_final_width",body[1][1].width) - end -end - -local function inject(row,copy,package) - local list = row[1] - if copy then - row[1] = copy_node_list(list) - end - if package then - context_beginvbox() - context(list) - context(new_kern(row[2])) - context_endvbox() - context_nointerlineskip() -- figure out a better way - if row[4] then - -- nothing as we have a span - elseif row[3] then - context_blank(row[3] .. "sp") -- why blank ? - else - context(new_glue(0)) - end - else - context(list) - context(new_kern(row[2])) - if row[3] then - context(new_glue(row[3])) - end - end -end - -local function total(row,distance) - local n = #row > 0 and rowdistance or 0 - for i=1,#row do - local ri = row[i] - n = n + ri[2] + (ri[3] or 0) - end - return n -end - --- local function append(list,what) --- for i=1,#what do --- local l = what[i] --- list[#list+1] = l[1] --- local k = l[2] + (l[3] or 0) --- if k ~= 0 then --- list[#list+1] = new_kern(k) --- end --- end --- end - -local function spanheight(body,i) - local height, n = 0, 1 - while true do - local bi = body[i] - if bi then - height = height + bi[2] + (bi[3] or 0) - if bi[4] then - n = n + 1 - i = i + 1 - else - break - end - else - break - end - end - return height, n -end - -function xtables.flush(directives) -- todo split by size / no inbetween then .. glue list kern blank - local vsize = directives.vsize - local method = directives.method or v_normal - local settings = data.settings - local results = data.results - local rowdistance = settings.rowdistance - local head = results[head_mode] - local foot = results[foot_mode] - local more = results[more_mode] - local body = results[body_mode] - local repeatheader = settings.header == v_repeat - local repeatfooter = settings.footer == v_repeat - if vsize and vsize > 0 then - context_beginvbox() - local bodystart = data.bodystart or 1 - local bodystop = data.bodystop or #body - if bodystart > 0 and bodystart <= bodystop then - local bodysize = vsize - local footsize = total(foot,rowdistance) - local headsize = total(head,rowdistance) - local moresize = total(more,rowdistance) - local firstsize, firstspans = spanheight(body,bodystart) - if bodystart == 1 then -- first chunk gets head - bodysize = bodysize - headsize - footsize - if headsize > 0 and bodysize >= firstsize then - for i=1,#head do - inject(head[i],repeatheader) - end - if rowdistance > 0 then - context(new_glue(rowdistance)) - end - if not repeatheader then - results[head_mode] = { } - end - end - elseif moresize > 0 then -- following chunk gets next - bodysize = bodysize - footsize - moresize - if bodysize >= firstsize then - for i=1,#more do - inject(more[i],true) - end - if rowdistance > 0 then - context(new_glue(rowdistance)) - end - end - elseif headsize > 0 and repeatheader then -- following chunk gets head - bodysize = bodysize - footsize - headsize - if bodysize >= firstsize then - for i=1,#head do - inject(head[i],true) - end - if rowdistance > 0 then - context(new_glue(rowdistance)) - end - end - else -- following chunk gets nothing - bodysize = bodysize - footsize - end - if bodysize >= firstsize then - local i = bodystart - while i <= bodystop do -- room for improvement - local total, spans = spanheight(body,i) - local bs = bodysize - total - if bs > 0 then - bodysize = bs - for s=1,spans do - inject(body[i]) - body[i] = nil - i = i + 1 - end - bodystart = i - else - break - end - end - if bodystart > bodystop then - -- all is flushed and footer fits - if footsize > 0 then - if rowdistance > 0 then - context(new_glue(rowdistance)) - end - for i=1,#foot do - inject(foot[i]) - end - results[foot_mode] = { } - end - results[body_mode] = { } - texsetcount("global","c_tabl_x_state",0) - else - -- some is left so footer is delayed - -- todo: try to flush a few more lines - if repeatfooter and footsize > 0 then - if rowdistance > 0 then - context(new_glue(rowdistance)) - end - for i=1,#foot do - inject(foot[i],true) - end - else - -- todo: try to fit more of body - end - texsetcount("global","c_tabl_x_state",2) - end - else - if firstsize > vsize then - -- get rid of the too large cell - for s=1,firstspans do - inject(body[bodystart]) - body[bodystart] = nil - bodystart = bodystart + 1 - end - end - texsetcount("global","c_tabl_x_state",2) -- 1 - end - else - texsetcount("global","c_tabl_x_state",0) - end - data.bodystart = bodystart - data.bodystop = bodystop - context_endvbox() - else - if method == variables.split then - -- maybe also a non float mode with header/footer repeat although - -- we can also use a float without caption - for i=1,#head do - inject(head[i],false,true) - end - if #head > 0 and rowdistance > 0 then - context_blank(rowdistance .. "sp") - end - for i=1,#body do - inject(body[i],false,true) - end - if #foot > 0 and rowdistance > 0 then - context_blank(rowdistance .. "sp") - end - for i=1,#foot do - inject(foot[i],false,true) - end - else -- normal - context_beginvbox() - for i=1,#head do - inject(head[i]) - end - if #head > 0 and rowdistance > 0 then - context(new_glue(rowdistance)) - end - for i=1,#body do - inject(body[i]) - end - if #foot > 0 and rowdistance > 0 then - context(new_glue(rowdistance)) - end - for i=1,#foot do - inject(foot[i]) - end - context_endvbox() - end - results[head_mode] = { } - results[body_mode] = { } - results[foot_mode] = { } - texsetcount("global","c_tabl_x_state",0) - end -end - -function xtables.cleanup() - for mode, result in next, data.results do - for _, r in next, result do - flush_node_list(r[1]) - end - end - data = table.remove(stack) -end - -function xtables.next_row() - local r = data.currentrow + 1 - data.modes[r] = texcount.c_tabl_x_mode - data.currentrow = r - data.currentcolumn = 0 -end - --- eventually we might only have commands - -commands.x_table_create = xtables.create -commands.x_table_reflow_width = xtables.reflow_width -commands.x_table_reflow_height = xtables.reflow_height -commands.x_table_construct = xtables.construct -commands.x_table_flush = xtables.flush -commands.x_table_cleanup = xtables.cleanup -commands.x_table_next_row = xtables.next_row -commands.x_table_init_reflow_width = xtables.initialize_reflow_width -commands.x_table_init_reflow_height = xtables.initialize_reflow_height -commands.x_table_init_construct = xtables.initialize_construct -commands.x_table_set_reflow_width = xtables.set_reflow_width -commands.x_table_set_reflow_height = xtables.set_reflow_height -commands.x_table_set_construct = xtables.set_construct +if not modules then modules = { } end modules ['tabl-xtb'] = {
+ version = 1.001,
+ comment = "companion to tabl-xtb.mkvi",
+ author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+ copyright = "PRAGMA ADE / ConTeXt Development Team",
+ license = "see context related readme files"
+}
+
+--[[
+
+This table mechanism is a combination between TeX and Lua. We do process
+cells at the TeX end and inspect them at the Lua end. After some analysis
+we have a second pass using the calculated widths, and if needed cells
+will go through a third pass to get the heights right. This last pass is
+avoided when possible which is why some code below looks a bit more
+complex than needed. The reason for such optimizations is that each cells
+is actually a framed instance and because tables like this can be hundreds
+of pages we want to keep processing time reasonable.
+
+To a large extend the behaviour is comparable with the way bTABLE/eTABLE
+works and there is a module that maps that one onto this one. Eventually
+this mechamism will be improved so that it can replace its older cousin.
+
+]]--
+
+-- todo: use linked list instead of r/c array
+
+local commands, context, tex, node = commands, context, tex, node
+
+local texdimen = tex.dimen
+local texcount = tex.count
+local texbox = tex.box
+local texsetcount = tex.setcount
+local texsetdimen = tex.setdimen
+
+local format = string.format
+local concat = table.concat
+local points = number.points
+
+local context = context
+local context_beginvbox = context.beginvbox
+local context_endvbox = context.endvbox
+local context_blank = context.blank
+local context_nointerlineskip = context.nointerlineskip
+
+local variables = interfaces.variables
+
+local setmetatableindex = table.setmetatableindex
+local settings_to_hash = utilities.parsers.settings_to_hash
+
+local copy_node_list = node.copy_list
+local hpack_node_list = node.hpack
+local vpack_node_list = node.vpack
+local slide_node_list = node.slide
+local flush_node_list = node.flush_list
+
+local nodepool = nodes.pool
+
+local new_glue = nodepool.glue
+local new_kern = nodepool.kern
+local new_penalty = nodepool.penalty
+local new_hlist = nodepool.hlist
+
+local v_stretch = variables.stretch
+local v_normal = variables.normal
+local v_width = variables.width
+local v_height = variables.height
+local v_repeat = variables["repeat"]
+local v_max = variables.max
+local v_fixed = variables.fixed
+
+local xtables = { }
+typesetters.xtables = xtables
+
+local trace_xtable = false
+local report_xtable = logs.reporter("xtable")
+
+trackers.register("xtable.construct", function(v) trace_xtable = v end)
+
+local null_mode = 0
+local head_mode = 1
+local foot_mode = 2
+local more_mode = 3
+local body_mode = 4
+
+local namedmodes = { [0] =
+ "null",
+ "head",
+ "foot",
+ "next",
+ "body",
+}
+
+local stack, data = { }, nil
+
+function xtables.create(settings)
+ table.insert(stack,data)
+ local rows = { }
+ local widths = { }
+ local heights = { }
+ local depths = { }
+ local spans = { }
+ local distances = { }
+ local autowidths = { }
+ local modes = { }
+ local fixedrows = { }
+ local fixedcolumns = { }
+ local frozencolumns = { }
+ local options = { }
+ data = {
+ rows = rows,
+ widths = widths,
+ heights = heights,
+ depths = depths,
+ spans = spans,
+ distances = distances,
+ modes = modes,
+ autowidths = autowidths,
+ fixedrows = fixedrows,
+ fixedcolumns = fixedcolumns,
+ frozencolumns = frozencolumns,
+ options = options,
+ nofrows = 0,
+ nofcolumns = 0,
+ currentrow = 0,
+ currentcolumn = 0,
+ settings = settings or { },
+ }
+ local function add_zero(t,k)
+ t[k] = 0
+ return 0
+ end
+ local function add_table(t,k)
+ local v = { }
+ t[k] = v
+ return v
+ end
+ local function add_cell(row,c)
+ local cell = {
+ nx = 0,
+ ny = 0,
+ list = false,
+ }
+ row[c] = cell
+ if c > data.nofcolumns then
+ data.nofcolumns = c
+ end
+ return cell
+ end
+ local function add_row(rows,r)
+ local row = { }
+ setmetatableindex(row,add_cell)
+ rows[r] = row
+ if r > data.nofrows then
+ data.nofrows = r
+ end
+ return row
+ end
+ setmetatableindex(rows,add_row)
+ setmetatableindex(widths,add_zero)
+ setmetatableindex(heights,add_zero)
+ setmetatableindex(depths,add_zero)
+ setmetatableindex(distances,add_zero)
+ setmetatableindex(modes,add_zero)
+ setmetatableindex(fixedrows,add_zero)
+ setmetatableindex(fixedcolumns,add_zero)
+ setmetatableindex(options,add_table)
+ --
+ settings.columndistance = tonumber(settings.columndistance) or 0
+ settings.rowdistance = tonumber(settings.rowdistance) or 0
+ settings.leftmargindistance = tonumber(settings.leftmargindistance) or 0
+ settings.rightmargindistance = tonumber(settings.rightmargindistance) or 0
+ settings.options = settings_to_hash(settings.option)
+ settings.textwidth = tonumber(settings.textwidth) or tex.hsize
+ settings.lineheight = tonumber(settings.lineheight) or texdimen.lineheight
+ settings.maxwidth = tonumber(settings.maxwidth) or settings.textwidth/8
+ -- if #stack > 0 then
+ -- settings.textwidth = tex.hsize
+ -- end
+ data.criterium_v = 2 * data.settings.lineheight
+ data.criterium_h = .75 * data.settings.textwidth
+
+end
+
+function xtables.initialize_reflow_width(option)
+ local r = data.currentrow
+ local c = data.currentcolumn + 1
+ local drc = data.rows[r][c]
+ drc.nx = texcount.c_tabl_x_nx
+ drc.ny = texcount.c_tabl_x_ny
+ local distances = data.distances
+ local distance = texdimen.d_tabl_x_distance
+ if distance > distances[c] then
+ distances[c] = distance
+ end
+ if option and option ~= "" then
+ local options = settings_to_hash(option)
+ data.options[r][c] = options
+ if options[v_fixed] then
+ data.frozencolumns[c] = true
+ end
+ end
+ data.currentcolumn = c
+end
+
+-- local function rather_fixed(n)
+-- for n in node.
+
+function xtables.set_reflow_width()
+ local r = data.currentrow
+ local c = data.currentcolumn
+ local rows = data.rows
+ local row = rows[r]
+ while row[c].span do -- can also be previous row ones
+ c = c + 1
+ end
+ local tb = texbox.b_tabl_x
+ local drc = row[c]
+ --
+ drc.list = true -- we don't need to keep the content around as we're in trial mode (no: copy_node_list(tb))
+ --
+ local widths, width = data.widths, tb.width
+ if width > widths[c] then
+ widths[c] = width
+ end
+ local heights, height = data.heights, tb.height
+ if height > heights[r] then
+ heights[r] = height
+ end
+ local depths, depth = data.depths, tb.depth
+ if depth > depths[r] then
+ depths[r] = depth
+ end
+ --
+ local dimensionstate = texcount.frameddimensionstate
+ local fixedcolumns = data.fixedcolumns
+ local fixedrows = data.fixedrows
+ if dimensionstate == 1 then
+ if width > fixedcolumns[c] then -- how about a span here?
+ fixedcolumns[c] = width
+ end
+ elseif dimensionstate == 2 then
+ fixedrows[r] = height
+ elseif dimensionstate == 3 then
+ fixedrows[r] = height -- width
+ fixedcolumns[c] = width -- height
+ else -- probably something frozen, like an image -- we could parse the list
+ if width <= data.criterium_h and height >= data.criterium_v then
+ if width > fixedcolumns[c] then -- how about a span here?
+ fixedcolumns[c] = width
+ end
+ end
+ end
+ drc.dimensionstate = dimensionstate
+ --
+ local nx, ny = drc.nx, drc.ny
+ if nx > 1 or ny > 1 then
+ local spans = data.spans
+ local self = true
+ for y=1,ny do
+ for x=1,nx do
+ if self then
+ self = false
+ else
+ local ry = r + y - 1
+ local cx = c + x - 1
+ if y > 1 then
+ spans[ry] = true
+ end
+ rows[ry][cx].span = true
+ end
+ end
+ end
+ c = c + nx - 1
+ end
+ if c > data.nofcolumns then
+ data.nofcolumns = c
+ end
+ data.currentcolumn = c
+end
+
+function xtables.initialize_reflow_height()
+ local r = data.currentrow
+ local c = data.currentcolumn + 1
+ local rows = data.rows
+ local row = rows[r]
+ while row[c].span do -- can also be previous row ones
+ c = c + 1
+ end
+ data.currentcolumn = c
+ local widths = data.widths
+ local w = widths[c]
+ local drc = row[c]
+ for x=1,drc.nx-1 do
+ w = w + widths[c+x]
+ end
+ texdimen.d_tabl_x_width = w
+ local dimensionstate = drc.dimensionstate or 0
+ if dimensionstate == 1 or dimensionstate == 3 then
+ -- width was fixed so height is known
+ texcount.c_tabl_x_skip_mode = 1
+ elseif dimensionstate == 2 then
+ -- height is enforced
+ texcount.c_tabl_x_skip_mode = 1
+ elseif data.autowidths[c] then
+ -- width has changed so we need to recalculate the height
+ texcount.c_tabl_x_skip_mode = 0
+ else
+ texcount.c_tabl_x_skip_mode = 1
+ end
+end
+
+function xtables.set_reflow_height()
+ local r = data.currentrow
+ local c = data.currentcolumn
+ local rows = data.rows
+ local row = rows[r]
+-- while row[c].span do -- we could adapt drc.nx instead
+-- c = c + 1
+-- end
+ local tb = texbox.b_tabl_x
+ local drc = row[c]
+ if data.fixedrows[r] == 0 then -- and drc.dimensionstate < 2
+ local heights, height = data.heights, tb.height
+ if height > heights[r] then
+ heights[r] = height
+ end
+ local depths, depth = data.depths, tb.depth
+ if depth > depths[r] then
+ depths[r] = depth
+ end
+ end
+-- c = c + drc.nx - 1
+-- data.currentcolumn = c
+end
+
+function xtables.initialize_construct()
+ local r = data.currentrow
+ local c = data.currentcolumn + 1
+ local rows = data.rows
+ local row = rows[r]
+ while row[c].span do -- can also be previous row ones
+ c = c + 1
+ end
+ data.currentcolumn = c
+ local widths = data.widths
+ local heights = data.heights
+ local depths = data.depths
+ local w = widths[c]
+ local h = heights[r]
+ local d = depths[r]
+ local drc = row[c]
+ for x=1,drc.nx-1 do
+ w = w + widths[c+x]
+ end
+ for y=1,drc.ny-1 do
+ h = h + heights[r+y]
+ d = d + depths[r+y]
+ end
+ texdimen.d_tabl_x_width = w
+ texdimen.d_tabl_x_height = h + d
+ texdimen.d_tabl_x_depth = 0
+end
+
+function xtables.set_construct()
+ local r = data.currentrow
+ local c = data.currentcolumn
+ local rows = data.rows
+ local row = rows[r]
+-- while row[c].span do -- can also be previous row ones
+-- c = c + 1
+-- end
+ local drc = row[c]
+ -- this will change as soon as in luatex we can reset a box list without freeing
+ drc.list = copy_node_list(texbox.b_tabl_x)
+-- c = c + drc.nx - 1
+-- data.currentcolumn = c
+end
+
+local function showwidths(where,widths,autowidths)
+ local result = { }
+ for i=1,#widths do
+ result[#result+1] = format("%12s%s",points(widths[i]),autowidths[i] and "*" or " ")
+ end
+ return report_xtable("%s : %s",where,concat(result," "))
+end
+
+function xtables.reflow_width()
+ local nofrows = data.nofrows
+ local nofcolumns = data.nofcolumns
+ local rows = data.rows
+ for r=1,nofrows do
+ local row = rows[r]
+ for c=1,nofcolumns do
+ local drc = row[c]
+ if drc.list then
+ -- flush_node_list(drc.list)
+ drc.list = false
+ end
+ end
+ end
+ -- spread
+ local settings = data.settings
+ local options = settings.options
+ local maxwidth = settings.maxwidth
+ -- calculate width
+ local widths = data.widths
+ local distances = data.distances
+ local autowidths = data.autowidths
+ local fixedcolumns = data.fixedcolumns
+ local frozencolumns = data.frozencolumns
+ local width = 0
+ local distance = 0
+ local nofwide = 0
+ local widetotal = 0
+ local available = settings.textwidth - settings.leftmargindistance - settings.rightmargindistance
+ if trace_xtable then
+ showwidths("stage 1",widths,autowidths)
+ end
+ local noffrozen = 0
+ if options[v_max] then
+ for c=1,nofcolumns do
+ width = width + widths[c]
+ if width > maxwidth then
+ autowidths[c] = true
+ nofwide = nofwide + 1
+ widetotal = widetotal + widths[c]
+ end
+ if c < nofcolumns then
+ distance = distance + distances[c]
+ end
+ if frozencolumns[c] then
+ noffrozen = noffrozen + 1 -- brr, should be nx or so
+ end
+ end
+ else
+ for c=1,nofcolumns do -- also keep track of forced
+ local fixedwidth = fixedcolumns[c]
+ if fixedwidth > 0 then
+ widths[c] = fixedwidth
+ width = width + fixedwidth
+ else
+ width = width + widths[c]
+ if width > maxwidth then
+ autowidths[c] = true
+ nofwide = nofwide + 1
+ widetotal = widetotal + widths[c]
+ end
+ end
+ if c < nofcolumns then
+ distance = distance + distances[c]
+ end
+ if frozencolumns[c] then
+ noffrozen = noffrozen + 1 -- brr, should be nx or so
+ end
+ end
+ end
+ if trace_xtable then
+ showwidths("stage 2",widths,autowidths)
+ end
+ local delta = available - width - distance - (nofcolumns-1) * settings.columndistance
+ if delta == 0 then
+ -- nothing to be done
+ if trace_xtable then
+ report_xtable("perfect fit")
+ end
+ elseif delta > 0 then
+ -- we can distribute some
+ if not options[v_stretch] then
+ -- not needed
+ if trace_xtable then
+ report_xtable("too wide but no stretch, delta %p",delta)
+ end
+ elseif options[v_width] then
+ local factor = delta / width
+ if trace_xtable then
+ report_xtable("proportional stretch, delta %p, width %p, factor %a",delta,width,factor)
+ end
+ for c=1,nofcolumns do
+ widths[c] = widths[c] + factor * widths[c]
+ end
+ else
+ -- frozen -> a column with option=fixed will not stretch
+ local extra = delta / (nofcolumns - noffrozen)
+ if trace_xtable then
+ report_xtable("normal stretch, delta %p, extra %p",delta,extra)
+ end
+ for c=1,nofcolumns do
+ if not frozencolumns[c] then
+ widths[c] = widths[c] + extra
+ end
+ end
+ end
+ elseif nofwide > 0 then
+ while true do
+ done = false
+ local available = (widetotal + delta) / nofwide
+ if trace_xtable then
+ report_xtable("shrink check, total %p, delta %p, columns %s, fixed %p",widetotal,delta,nofwide,available)
+ end
+ for c=1,nofcolumns do
+ if autowidths[c] and available >= widths[c] then
+ autowidths[c] = nil
+ nofwide = nofwide - 1
+ widetotal = widetotal - widths[c]
+ done = true
+ end
+ end
+ if not done then
+ break
+ end
+ end
+ -- maybe also options[v_width] here but tricky as width does not say
+ -- much about amount
+ if options[v_width] then -- not that much (we could have a clever vpack loop balancing .. no fun)
+ local factor = (widetotal + delta) / width
+ if trace_xtable then
+ report_xtable("proportional shrink used, total %p, delta %p, columns %s, factor %s",widetotal,delta,nofwide,factor)
+ end
+ for c=1,nofcolumns do
+ if autowidths[c] then
+ widths[c] = factor * widths[c]
+ end
+ end
+ else
+ local available = (widetotal + delta) / nofwide
+ if trace_xtable then
+ report_xtable("normal shrink used, total %p, delta %p, columns %s, fixed %p",widetotal,delta,nofwide,available)
+ end
+ for c=1,nofcolumns do
+ if autowidths[c] then
+ widths[c] = available
+ end
+ end
+ end
+ end
+ if trace_xtable then
+ showwidths("stage 3",widths,autowidths)
+ end
+ --
+ data.currentrow = 0
+ data.currentcolumn = 0
+end
+
+function xtables.reflow_height()
+ data.currentrow = 0
+ data.currentcolumn = 0
+ local settings = data.settings
+ if settings.options[v_height] then
+ local heights = data.heights
+ local depths = data.depths
+ local nofrows = data.nofrows
+ local totalheight = 0
+ local totaldepth = 0
+ for i=1,nofrows do
+ totalheight = totalheight + heights[i]
+ totalheight = totalheight + depths [i]
+ end
+ local total = totalheight + totaldepth
+ local leftover = settings.textheight - total
+ if leftover > 0 then
+ local leftheight = (totalheight / total ) * leftover / #heights
+ local leftdepth = (totaldepth / total ) * leftover / #depths
+ for i=1,nofrows do
+ heights[i] = heights[i] + leftheight
+ depths [i] = depths [i] + leftdepth
+ end
+ end
+ end
+end
+
+local function showspans(data)
+ local rows = data.rows
+ local modes = data.modes
+ local nofcolumns = data.nofcolumns
+ local nofrows = data.nofrows
+ for r=1,nofrows do
+ local line = { }
+ local row = rows[r]
+ for c=1,nofcolumns do
+ local cell =row[c]
+ if cell.list then
+ line[#line+1] = "list"
+ elseif cell.span then
+ line[#line+1] = "span"
+ else
+ line[#line+1] = "none"
+ end
+ end
+ report_xtable("%3d : %s : % t",r,namedmodes[modes[r]] or "----",line)
+ end
+end
+
+function xtables.construct()
+ local rows = data.rows
+ local heights = data.heights
+ local depths = data.depths
+ local widths = data.widths
+ local spans = data.spans
+ local distances = data.distances
+ local modes = data.modes
+ local settings = data.settings
+ local nofcolumns = data.nofcolumns
+ local nofrows = data.nofrows
+ local columndistance = settings.columndistance
+ local rowdistance = settings.rowdistance
+ local leftmargindistance = settings.leftmargindistance
+ local rightmargindistance = settings.rightmargindistance
+ -- ranges can be mixes so we collect
+
+ if trace_xtable then
+ showspans(data)
+ end
+
+ local ranges = {
+ [head_mode] = { },
+ [foot_mode] = { },
+ [more_mode] = { },
+ [body_mode] = { },
+ }
+ for r=1,nofrows do
+ local m = modes[r]
+ if m == 0 then
+ m = body_mode
+ end
+ local range = ranges[m]
+ range[#range+1] = r
+ end
+ -- todo: hook in the splitter ... the splitter can ask for a chunk of
+ -- a certain size ... no longer a split memory issue then and header
+ -- footer then has to happen here too .. target height
+ local function packaged_column(r)
+ local row = rows[r]
+ local start = nil
+ local stop = nil
+ if leftmargindistance > 0 then
+ start = new_kern(leftmargindistance)
+ stop = start
+ end
+ local hasspan = false
+ for c=1,nofcolumns do
+ local drc = row[c]
+ if not hasspan then
+ hasspan = drc.span
+ end
+ local list = drc.list
+ if list then
+ list.shift = list.height + list.depth
+ -- list = hpack_node_list(list) -- is somehow needed
+ -- list.width = 0
+ -- list.height = 0
+ -- list.depth = 0
+ -- faster:
+ local h = new_hlist()
+ h.list = list
+ list = h
+ --
+ if start then
+ stop.next = list
+ list.prev = stop
+ else
+ start = list
+ end
+ stop = list -- one node anyway, so not needed: slide_node_list(list)
+ end
+ local step = widths[c]
+ if c < nofcolumns then
+ step = step + columndistance + distances[c]
+ end
+ local kern = new_kern(step)
+ if stop then
+ stop.prev = kern
+ stop.next = kern
+ else -- can be first spanning next row (ny=...)
+ start = kern
+ end
+ stop = kern
+ end
+ if start then
+ if rightmargindistance > 0 then
+ local kern = new_kern(rightmargindistance)
+ stop.next = kern
+ kern.prev = stop
+ -- stop = kern
+ end
+ return start, heights[r] + depths[r], hasspan
+ end
+ end
+ local function collect_range(range)
+ local result, nofr = { }, 0
+ local nofrange = #range
+ for i=1,#range do
+ local r = range[i]
+ -- local row = rows[r]
+ local list, size, hasspan = packaged_column(r)
+ if list then
+ if hasspan and nofr > 0 then
+ result[nofr][4] = true
+ end
+ nofr = nofr + 1
+ result[nofr] = {
+ hpack_node_list(list),
+ size,
+ i < nofrange and rowdistance > 0 and rowdistance or false, -- might move
+ false
+ }
+ end
+ end
+ return result
+ end
+ local body = collect_range(ranges[body_mode])
+ data.results = {
+ [head_mode] = collect_range(ranges[head_mode]),
+ [foot_mode] = collect_range(ranges[foot_mode]),
+ [more_mode] = collect_range(ranges[more_mode]),
+ [body_mode] = body,
+ }
+ if #body == 0 then
+ texsetcount("global","c_tabl_x_state",0)
+ texsetdimen("global","d_tabl_x_final_width",0)
+ else
+ texsetcount("global","c_tabl_x_state",1)
+ texsetdimen("global","d_tabl_x_final_width",body[1][1].width)
+ end
+end
+
+local function inject(row,copy,package)
+ local list = row[1]
+ if copy then
+ row[1] = copy_node_list(list)
+ end
+ if package then
+ context_beginvbox()
+ context(list)
+ context(new_kern(row[2]))
+ context_endvbox()
+ context_nointerlineskip() -- figure out a better way
+ if row[4] then
+ -- nothing as we have a span
+ elseif row[3] then
+ context_blank(row[3] .. "sp") -- why blank ?
+ else
+ context(new_glue(0))
+ end
+ else
+ context(list)
+ context(new_kern(row[2]))
+ if row[3] then
+ context(new_glue(row[3]))
+ end
+ end
+end
+
+local function total(row,distance)
+ local n = #row > 0 and rowdistance or 0
+ for i=1,#row do
+ local ri = row[i]
+ n = n + ri[2] + (ri[3] or 0)
+ end
+ return n
+end
+
+-- local function append(list,what)
+-- for i=1,#what do
+-- local l = what[i]
+-- list[#list+1] = l[1]
+-- local k = l[2] + (l[3] or 0)
+-- if k ~= 0 then
+-- list[#list+1] = new_kern(k)
+-- end
+-- end
+-- end
+
+local function spanheight(body,i)
+ local height, n = 0, 1
+ while true do
+ local bi = body[i]
+ if bi then
+ height = height + bi[2] + (bi[3] or 0)
+ if bi[4] then
+ n = n + 1
+ i = i + 1
+ else
+ break
+ end
+ else
+ break
+ end
+ end
+ return height, n
+end
+
+function xtables.flush(directives) -- todo split by size / no inbetween then .. glue list kern blank
+ local vsize = directives.vsize
+ local method = directives.method or v_normal
+ local settings = data.settings
+ local results = data.results
+ local rowdistance = settings.rowdistance
+ local head = results[head_mode]
+ local foot = results[foot_mode]
+ local more = results[more_mode]
+ local body = results[body_mode]
+ local repeatheader = settings.header == v_repeat
+ local repeatfooter = settings.footer == v_repeat
+ if vsize and vsize > 0 then
+ context_beginvbox()
+ local bodystart = data.bodystart or 1
+ local bodystop = data.bodystop or #body
+ if bodystart > 0 and bodystart <= bodystop then
+ local bodysize = vsize
+ local footsize = total(foot,rowdistance)
+ local headsize = total(head,rowdistance)
+ local moresize = total(more,rowdistance)
+ local firstsize, firstspans = spanheight(body,bodystart)
+ if bodystart == 1 then -- first chunk gets head
+ bodysize = bodysize - headsize - footsize
+ if headsize > 0 and bodysize >= firstsize then
+ for i=1,#head do
+ inject(head[i],repeatheader)
+ end
+ if rowdistance > 0 then
+ context(new_glue(rowdistance))
+ end
+ if not repeatheader then
+ results[head_mode] = { }
+ end
+ end
+ elseif moresize > 0 then -- following chunk gets next
+ bodysize = bodysize - footsize - moresize
+ if bodysize >= firstsize then
+ for i=1,#more do
+ inject(more[i],true)
+ end
+ if rowdistance > 0 then
+ context(new_glue(rowdistance))
+ end
+ end
+ elseif headsize > 0 and repeatheader then -- following chunk gets head
+ bodysize = bodysize - footsize - headsize
+ if bodysize >= firstsize then
+ for i=1,#head do
+ inject(head[i],true)
+ end
+ if rowdistance > 0 then
+ context(new_glue(rowdistance))
+ end
+ end
+ else -- following chunk gets nothing
+ bodysize = bodysize - footsize
+ end
+ if bodysize >= firstsize then
+ local i = bodystart
+ while i <= bodystop do -- room for improvement
+ local total, spans = spanheight(body,i)
+ local bs = bodysize - total
+ if bs > 0 then
+ bodysize = bs
+ for s=1,spans do
+ inject(body[i])
+ body[i] = nil
+ i = i + 1
+ end
+ bodystart = i
+ else
+ break
+ end
+ end
+ if bodystart > bodystop then
+ -- all is flushed and footer fits
+ if footsize > 0 then
+ if rowdistance > 0 then
+ context(new_glue(rowdistance))
+ end
+ for i=1,#foot do
+ inject(foot[i])
+ end
+ results[foot_mode] = { }
+ end
+ results[body_mode] = { }
+ texsetcount("global","c_tabl_x_state",0)
+ else
+ -- some is left so footer is delayed
+ -- todo: try to flush a few more lines
+ if repeatfooter and footsize > 0 then
+ if rowdistance > 0 then
+ context(new_glue(rowdistance))
+ end
+ for i=1,#foot do
+ inject(foot[i],true)
+ end
+ else
+ -- todo: try to fit more of body
+ end
+ texsetcount("global","c_tabl_x_state",2)
+ end
+ else
+ if firstsize > vsize then
+ -- get rid of the too large cell
+ for s=1,firstspans do
+ inject(body[bodystart])
+ body[bodystart] = nil
+ bodystart = bodystart + 1
+ end
+ end
+ texsetcount("global","c_tabl_x_state",2) -- 1
+ end
+ else
+ texsetcount("global","c_tabl_x_state",0)
+ end
+ data.bodystart = bodystart
+ data.bodystop = bodystop
+ context_endvbox()
+ else
+ if method == variables.split then
+ -- maybe also a non float mode with header/footer repeat although
+ -- we can also use a float without caption
+ for i=1,#head do
+ inject(head[i],false,true)
+ end
+ if #head > 0 and rowdistance > 0 then
+ context_blank(rowdistance .. "sp")
+ end
+ for i=1,#body do
+ inject(body[i],false,true)
+ end
+ if #foot > 0 and rowdistance > 0 then
+ context_blank(rowdistance .. "sp")
+ end
+ for i=1,#foot do
+ inject(foot[i],false,true)
+ end
+ else -- normal
+ context_beginvbox()
+ for i=1,#head do
+ inject(head[i])
+ end
+ if #head > 0 and rowdistance > 0 then
+ context(new_glue(rowdistance))
+ end
+ for i=1,#body do
+ inject(body[i])
+ end
+ if #foot > 0 and rowdistance > 0 then
+ context(new_glue(rowdistance))
+ end
+ for i=1,#foot do
+ inject(foot[i])
+ end
+ context_endvbox()
+ end
+ results[head_mode] = { }
+ results[body_mode] = { }
+ results[foot_mode] = { }
+ texsetcount("global","c_tabl_x_state",0)
+ end
+end
+
+function xtables.cleanup()
+ for mode, result in next, data.results do
+ for _, r in next, result do
+ flush_node_list(r[1])
+ end
+ end
+ data = table.remove(stack)
+end
+
+function xtables.next_row()
+ local r = data.currentrow + 1
+ data.modes[r] = texcount.c_tabl_x_mode
+ data.currentrow = r
+ data.currentcolumn = 0
+end
+
+-- eventually we might only have commands
+
+commands.x_table_create = xtables.create
+commands.x_table_reflow_width = xtables.reflow_width
+commands.x_table_reflow_height = xtables.reflow_height
+commands.x_table_construct = xtables.construct
+commands.x_table_flush = xtables.flush
+commands.x_table_cleanup = xtables.cleanup
+commands.x_table_next_row = xtables.next_row
+commands.x_table_init_reflow_width = xtables.initialize_reflow_width
+commands.x_table_init_reflow_height = xtables.initialize_reflow_height
+commands.x_table_init_construct = xtables.initialize_construct
+commands.x_table_set_reflow_width = xtables.set_reflow_width
+commands.x_table_set_reflow_height = xtables.set_reflow_height
+commands.x_table_set_construct = xtables.set_construct
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