diff options
Diffstat (limited to 'tex/context/base/page-mis.lua')
-rw-r--r-- | tex/context/base/page-mis.lua | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/tex/context/base/page-mis.lua b/tex/context/base/page-mis.lua new file mode 100644 index 000000000..4f9d3c3e2 --- /dev/null +++ b/tex/context/base/page-mis.lua @@ -0,0 +1,77 @@ +if not modules then modules = { } end modules ['page-mis'] = { + version = 1.001, + comment = "companion to page-mis.mkiv", + author = "Hans Hagen, PRAGMA-ADE, Hasselt NL", + copyright = "PRAGMA ADE / ConTeXt Development Team", + license = "see context related readme files" +} + +-- todo: adapt message + +local sortedkeys = table.sortedkeys + +local cache = { } + +local function flush(page) + local c = cache[page] + if c then + for i=1,#c do + context.viafile(c[i]) + end + cache[page] = nil + end +end + +local function setnextpage() + local n = next(cache) and sortedkeys(cache)[1] + if not n then + n = 0 -- nothing in the cache + elseif n == 0 then + n = -1 -- generic buffer (0) + elseif n > 0 then + -- upcoming page (realpageno) + end + tex.setcount("global","c_page_postponed_blocks_next_page",n) +end + +function commands.flushpostponedblocks(page) + -- we need to flush previously pending pages as well and the zero + -- slot is the generic one so that one is always flushed + local t = sortedkeys(cache) + local p = tonumber(page) or tex.count.realpageno or 0 + for i=1,#t do + local ti = t[i] + if ti <= p then + flush(ti) + else + break + end + end + setnextpage() +end + +function commands.registerpostponedblock(page) + if type(page) == "string" then + if string.find(page,"^+") then + page = tex.count.realpageno + (tonumber(page) or 1) -- future delta page + else + page = tonumber(page) or 0 -- preferred page or otherwise first possible occasion + end + end + if not page then + page = 0 + end + local c = cache[page] + if not c then + c = { } + cache[page] = c + end + c[#c+1] = buffers.raw("postponedblock") + buffers.erase("postponedblock") + if page == 0 then + interfaces.showmessage("layouts",3,#c) + else + interfaces.showmessage("layouts",3,string.format("%s (realpage: %s)",#c,page)) + end + setnextpage() +end |