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diff --git a/tex/context/base/mkxl/node-pag.lmt b/tex/context/base/mkxl/node-pag.lmt
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+if not modules then modules = { } end modules ['node-pag'] = {
+ version = 1.001,
+ comment = "companion to node-pag.mkiv",
+ author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+ copyright = "PRAGMA ADE / ConTeXt Development Team",
+ license = "see context related readme files"
+}
+
+-- Currently we have no usage for this and it can even be dangerous to mess with
+-- the list at this stage, so this is effectively just a placeholder. Users can
+-- only mess with before and after hooks.
+
+pagebuilders = pagebuilders or { }
+
+local starttiming, stoptiming = statistics.starttiming, statistics.stoptiming
+
+local actions = nodes.tasks.actions("pagebuilders")
+
+local function processor(head,groupcode,size,packtype,maxdepth,direction)
+ if head then
+ starttiming(pagebuilders)
+ head = actions(head,groupcode,size,packtype,maxdepth,direction)
+ stoptiming(pagebuilders)
+ end
+ return head
+end
+
+callbacks.register("pre_output_filter",processor,"preparing output box")
+
+statistics.register("output preparation time", function()
+ return statistics.elapsedseconds(pagebuilders)
+end)