diff options
Diffstat (limited to 'tex/context/base/page-str.lua')
| -rw-r--r-- | tex/context/base/page-str.lua | 464 |
1 files changed, 232 insertions, 232 deletions
diff --git a/tex/context/base/page-str.lua b/tex/context/base/page-str.lua index b9b5086cf..f6314657f 100644 --- a/tex/context/base/page-str.lua +++ b/tex/context/base/page-str.lua @@ -1,232 +1,232 @@ -if not modules then modules = { } end modules ['page-str'] = {
- version = 1.001,
- comment = "companion to page-str.mkiv",
- author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
- copyright = "PRAGMA ADE / ConTeXt Development Team",
- license = "see context related readme files"
-}
-
--- streams -> managers.streams
-
--- work in progresss .. unfinished
-
-local concat, insert, remove = table.concat, table.insert, table.remove
-
-local find_tail, write_node, free_node, copy_nodelist = node.slide, node.write, node.free, node.copy_list
-local vpack_nodelist, hpack_nodelist = node.vpack, node.hpack
-local texdimen, texbox = tex.dimen, tex.box
-local settings_to_array = utilities.parsers.settings_to_array
-
-local nodes, node = nodes, node
-
-local nodepool = nodes.pool
-local tasks = nodes.tasks
-
-local new_kern = nodepool.kern
-local new_glyph = nodepool.glyph
-
-local trace_collecting = false trackers.register("streams.collecting", function(v) trace_collecting = v end)
-local trace_flushing = false trackers.register("streams.flushing", function(v) trace_flushing = v end)
-
-local report_streams = logs.reporter("streams")
-
-streams = streams or { } -- might move to the builders namespace
-local streams = streams
-
-local data, name, stack = { }, nil, { }
-
-function streams.enable(newname)
- if newname == "default" then
- name = nil
- else
- name = newname
- end
-end
-
-function streams.disable()
- name = stack[#stack]
-end
-
-function streams.start(newname)
- insert(stack,name)
- name = newname
-end
-
-function streams.stop(newname)
- name = remove(stack)
-end
-
-function streams.collect(head,where)
- if name and head and name ~= "default" then
- local tail = node.slide(head)
- local dana = data[name]
- if not dana then
- dana = { }
- data[name] = dana
- end
- local last = dana[#dana]
- if last then
- local tail = find_tail(last)
- tail.next, head.prev = head, tail
- elseif last == false then
- dana[#dana] = head
- else
- dana[1] = head
- end
- if trace_collecting then
- report_streams("appending snippet %a to slot %s",name,#dana)
- end
- return nil, true
- else
- return head, false
- end
-end
-
-function streams.push(thename)
- if not thename or thename == "" then
- thename = name
- end
- if thename and thename ~= "" then
- local dana = data[thename]
- if dana then
- dana[#dana+1] = false
- if trace_collecting then
- report_streams("pushing snippet %a",thename)
- end
- end
- end
-end
-
-function streams.flush(name,copy) -- problem: we need to migrate afterwards
- local dana = data[name]
- if dana then
- local dn = #dana
- if dn == 0 then
- -- nothing to flush
- elseif copy then
- if trace_flushing then
- report_streams("flushing copies of %s slots of %a",dn,name)
- end
- for i=1,dn do
- local di = dana[i]
- if di then
- write_node(copy_nodelist(di.list)) -- list, will be option
- end
- end
- if copy then
- data[name] = nil
- end
- else
- if trace_flushing then
- report_streams("flushing %s slots of %a",dn,name)
- end
- for i=1,dn do
- local di = dana[i]
- if di then
- write_node(di.list) -- list, will be option
- di.list = nil
- free_node(di)
- end
- end
- end
- end
-end
-
-function streams.synchronize(list) -- this is an experiment !
- -- we don't optimize this as we want to trace in detail
- list = settings_to_array(list)
- local max = 0
- if trace_flushing then
- report_streams("synchronizing list: % t",list)
- end
- for i=1,#list do
- local dana = data[list[i]]
- if dana then
- local n = #dana
- if n > max then
- max = n
- end
- end
- end
- if trace_flushing then
- report_streams("maximum number of slots: %s",max)
- end
- for m=1,max do
- local height, depth = 0, 0
- for i=1,#list do
- local name = list[i]
- local dana = data[name]
- local slot = dana[m]
- if slot then
- local vbox = vpack_nodelist(slot)
- local ht, dp = vbox.height, vbox.depth
- if ht > height then
- height = ht
- end
- if dp > depth then
- depth = dp
- end
- dana[m] = vbox
- if trace_flushing then
- report_streams("slot %s of %a is packed to height %p and depth %p",m,name,ht,dp)
- end
- end
- end
- if trace_flushing then
- report_streams("slot %s has max height %p and max depth %p",m,height,depth)
- end
- local strutht, strutdp = texdimen.globalbodyfontstrutheight, texdimen.globalbodyfontstrutdepth
- local struthtdp = strutht + strutdp
- for i=1,#list do
- local name = list[i]
- local dana = data[name]
- local vbox = dana[m]
- if vbox then
- local delta_height = height - vbox.height
- local delta_depth = depth - vbox.depth
- if delta_height > 0 or delta_depth > 0 then
- if false then
- -- actually we need to add glue and repack
- vbox.height, vbox.depth = height, depth
- if trace_flushing then
- report_streams("slot %s of %a with delta (%p,%p) is compensated",m,i,delta_height,delta_depth)
- end
- else
- -- this is not yet ok as we also need to keep an eye on vertical spacing
- -- so we might need to do some splitting or whatever
- local tail = vbox.list and find_tail(vbox.list)
- local n, delta = 0, delta_height -- for tracing
- while delta > 0 do
- -- we need to add some interline penalties
- local line = copy_nodelist(tex.box.strutbox)
- line.height, line.depth = strutht, strutdp
- if tail then
- tail.next, line.prev = line, tail
- end
- tail = line
- n, delta = n +1, delta - struthtdp
- end
- dana[m] = vpack_nodelist(vbox.list)
- vbox.list = nil
- free_node(vbox)
- if trace_flushing then
- report_streams("slot %s:%s with delta (%p,%p) is compensated by %s lines",m,i,delta_height,delta_depth,n)
- end
- end
- end
- else
- -- make dummy
- end
- end
- end
-end
-
-tasks.appendaction("mvlbuilders", "normalizers", "streams.collect")
-
-tasks.disableaction("mvlbuilders", "streams.collect")
-
-function streams.initialize()
- tasks.enableaction ("mvlbuilders", "streams.collect")
-end
-
--- todo: remove empty last { }'s
+if not modules then modules = { } end modules ['page-str'] = { + version = 1.001, + comment = "companion to page-str.mkiv", + author = "Hans Hagen, PRAGMA-ADE, Hasselt NL", + copyright = "PRAGMA ADE / ConTeXt Development Team", + license = "see context related readme files" +} + +-- streams -> managers.streams + +-- work in progresss .. unfinished + +local concat, insert, remove = table.concat, table.insert, table.remove + +local find_tail, write_node, free_node, copy_nodelist = node.slide, node.write, node.free, node.copy_list +local vpack_nodelist, hpack_nodelist = node.vpack, node.hpack +local texdimen, texbox = tex.dimen, tex.box +local settings_to_array = utilities.parsers.settings_to_array + +local nodes, node = nodes, node + +local nodepool = nodes.pool +local tasks = nodes.tasks + +local new_kern = nodepool.kern +local new_glyph = nodepool.glyph + +local trace_collecting = false trackers.register("streams.collecting", function(v) trace_collecting = v end) +local trace_flushing = false trackers.register("streams.flushing", function(v) trace_flushing = v end) + +local report_streams = logs.reporter("streams") + +streams = streams or { } -- might move to the builders namespace +local streams = streams + +local data, name, stack = { }, nil, { } + +function streams.enable(newname) + if newname == "default" then + name = nil + else + name = newname + end +end + +function streams.disable() + name = stack[#stack] +end + +function streams.start(newname) + insert(stack,name) + name = newname +end + +function streams.stop(newname) + name = remove(stack) +end + +function streams.collect(head,where) + if name and head and name ~= "default" then + local tail = node.slide(head) + local dana = data[name] + if not dana then + dana = { } + data[name] = dana + end + local last = dana[#dana] + if last then + local tail = find_tail(last) + tail.next, head.prev = head, tail + elseif last == false then + dana[#dana] = head + else + dana[1] = head + end + if trace_collecting then + report_streams("appending snippet %a to slot %s",name,#dana) + end + return nil, true + else + return head, false + end +end + +function streams.push(thename) + if not thename or thename == "" then + thename = name + end + if thename and thename ~= "" then + local dana = data[thename] + if dana then + dana[#dana+1] = false + if trace_collecting then + report_streams("pushing snippet %a",thename) + end + end + end +end + +function streams.flush(name,copy) -- problem: we need to migrate afterwards + local dana = data[name] + if dana then + local dn = #dana + if dn == 0 then + -- nothing to flush + elseif copy then + if trace_flushing then + report_streams("flushing copies of %s slots of %a",dn,name) + end + for i=1,dn do + local di = dana[i] + if di then + write_node(copy_nodelist(di.list)) -- list, will be option + end + end + if copy then + data[name] = nil + end + else + if trace_flushing then + report_streams("flushing %s slots of %a",dn,name) + end + for i=1,dn do + local di = dana[i] + if di then + write_node(di.list) -- list, will be option + di.list = nil + free_node(di) + end + end + end + end +end + +function streams.synchronize(list) -- this is an experiment ! + -- we don't optimize this as we want to trace in detail + list = settings_to_array(list) + local max = 0 + if trace_flushing then + report_streams("synchronizing list: % t",list) + end + for i=1,#list do + local dana = data[list[i]] + if dana then + local n = #dana + if n > max then + max = n + end + end + end + if trace_flushing then + report_streams("maximum number of slots: %s",max) + end + for m=1,max do + local height, depth = 0, 0 + for i=1,#list do + local name = list[i] + local dana = data[name] + local slot = dana[m] + if slot then + local vbox = vpack_nodelist(slot) + local ht, dp = vbox.height, vbox.depth + if ht > height then + height = ht + end + if dp > depth then + depth = dp + end + dana[m] = vbox + if trace_flushing then + report_streams("slot %s of %a is packed to height %p and depth %p",m,name,ht,dp) + end + end + end + if trace_flushing then + report_streams("slot %s has max height %p and max depth %p",m,height,depth) + end + local strutht, strutdp = texdimen.globalbodyfontstrutheight, texdimen.globalbodyfontstrutdepth + local struthtdp = strutht + strutdp + for i=1,#list do + local name = list[i] + local dana = data[name] + local vbox = dana[m] + if vbox then + local delta_height = height - vbox.height + local delta_depth = depth - vbox.depth + if delta_height > 0 or delta_depth > 0 then + if false then + -- actually we need to add glue and repack + vbox.height, vbox.depth = height, depth + if trace_flushing then + report_streams("slot %s of %a with delta (%p,%p) is compensated",m,i,delta_height,delta_depth) + end + else + -- this is not yet ok as we also need to keep an eye on vertical spacing + -- so we might need to do some splitting or whatever + local tail = vbox.list and find_tail(vbox.list) + local n, delta = 0, delta_height -- for tracing + while delta > 0 do + -- we need to add some interline penalties + local line = copy_nodelist(tex.box.strutbox) + line.height, line.depth = strutht, strutdp + if tail then + tail.next, line.prev = line, tail + end + tail = line + n, delta = n +1, delta - struthtdp + end + dana[m] = vpack_nodelist(vbox.list) + vbox.list = nil + free_node(vbox) + if trace_flushing then + report_streams("slot %s:%s with delta (%p,%p) is compensated by %s lines",m,i,delta_height,delta_depth,n) + end + end + end + else + -- make dummy + end + end + end +end + +tasks.appendaction("mvlbuilders", "normalizers", "streams.collect") + +tasks.disableaction("mvlbuilders", "streams.collect") + +function streams.initialize() + tasks.enableaction ("mvlbuilders", "streams.collect") +end + +-- todo: remove empty last { }'s |