diff options
Diffstat (limited to 'tex/context/base/node-tst.lua')
| -rw-r--r-- | tex/context/base/node-tst.lua | 240 |
1 files changed, 120 insertions, 120 deletions
diff --git a/tex/context/base/node-tst.lua b/tex/context/base/node-tst.lua index bfe0051bd..98743ca0d 100644 --- a/tex/context/base/node-tst.lua +++ b/tex/context/base/node-tst.lua @@ -1,120 +1,120 @@ -if not modules then modules = { } end modules ['node-tst'] = { - version = 1.001, - comment = "companion to node-ini.mkiv", - author = "Hans Hagen, PRAGMA-ADE, Hasselt NL", - copyright = "PRAGMA ADE / ConTeXt Development Team", - license = "see context related readme files" -} - -local nodes, node = nodes, node - -local chardata = characters.data -local nodecodes = nodes.nodecodes -local skipcodes = nodes.skipcodes - -local glue_code = nodecodes.glue -local penalty_code = nodecodes.penalty -local kern_code = nodecodes.kern -local glyph_code = nodecodes.glyph -local whatsit_code = nodecodes.whatsit -local hlist_code = nodecodes.hlist - -local leftskip_code = skipcodes.leftskip -local rightskip_code = skipcodes.rightskip -local abovedisplayshortskip_code = skipcodes.abovedisplayshortskip -local belowdisplayshortskip_code = skipcodes.belowdisplayshortskip - -local find_node_tail = node.tail or node.slide - -function nodes.leftmarginwidth(n) -- todo: three values - while n do - local id = n.id - if id == glue_code then - return n.subtype == leftskip_code and n.spec.width or 0 - elseif id == whatsit_code then - n = n.next - elseif id == hlist_code then - return n.width - else - break - end - end - return 0 -end - -function nodes.rightmarginwidth(n) - if n then - n = find_node_tail(n) - while n do - local id = n.id - if id == glue_code then - return n.subtype == rightskip_code and n.spec.width or 0 - elseif id == whatsit_code then - n = n.prev - else - break - end - end - end - return false -end - -function nodes.somespace(n,all) - if n then - local id = n.id - if id == glue_code then - return (all or (n.spec.width ~= 0)) and glue_code - elseif id == kern_code then - return (all or (n.kern ~= 0)) and kern - elseif id == glyph_code then - local category = chardata[n.char].category - -- maybe more category checks are needed - return (category == "zs") and glyph_code - end - end - return false -end - -function nodes.somepenalty(n,value) - if n then - local id = n.id - if id == penalty_code then - if value then - return n.penalty == value - else - return true - end - end - end - return false -end - -function nodes.is_display_math(head) - local n = head.prev - while n do - local id = n.id - if id == penalty_code then - elseif id == glue_code then - if n.subtype == abovedisplayshortskip_code then - return true - end - else - break - end - n = n.prev - end - n = head.next - while n do - local id = n.id - if id == penalty_code then - elseif id == glue_code then - if n.subtype == belowdisplayshortskip_code then - return true - end - else - break - end - n = n.next - end - return false -end +if not modules then modules = { } end modules ['node-tst'] = {
+ version = 1.001,
+ comment = "companion to node-ini.mkiv",
+ author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+ copyright = "PRAGMA ADE / ConTeXt Development Team",
+ license = "see context related readme files"
+}
+
+local nodes, node = nodes, node
+
+local chardata = characters.data
+local nodecodes = nodes.nodecodes
+local skipcodes = nodes.skipcodes
+
+local glue_code = nodecodes.glue
+local penalty_code = nodecodes.penalty
+local kern_code = nodecodes.kern
+local glyph_code = nodecodes.glyph
+local whatsit_code = nodecodes.whatsit
+local hlist_code = nodecodes.hlist
+
+local leftskip_code = skipcodes.leftskip
+local rightskip_code = skipcodes.rightskip
+local abovedisplayshortskip_code = skipcodes.abovedisplayshortskip
+local belowdisplayshortskip_code = skipcodes.belowdisplayshortskip
+
+local find_node_tail = node.tail or node.slide
+
+function nodes.leftmarginwidth(n) -- todo: three values
+ while n do
+ local id = n.id
+ if id == glue_code then
+ return n.subtype == leftskip_code and n.spec.width or 0
+ elseif id == whatsit_code then
+ n = n.next
+ elseif id == hlist_code then
+ return n.width
+ else
+ break
+ end
+ end
+ return 0
+end
+
+function nodes.rightmarginwidth(n)
+ if n then
+ n = find_node_tail(n)
+ while n do
+ local id = n.id
+ if id == glue_code then
+ return n.subtype == rightskip_code and n.spec.width or 0
+ elseif id == whatsit_code then
+ n = n.prev
+ else
+ break
+ end
+ end
+ end
+ return false
+end
+
+function nodes.somespace(n,all)
+ if n then
+ local id = n.id
+ if id == glue_code then
+ return (all or (n.spec.width ~= 0)) and glue_code
+ elseif id == kern_code then
+ return (all or (n.kern ~= 0)) and kern
+ elseif id == glyph_code then
+ local category = chardata[n.char].category
+ -- maybe more category checks are needed
+ return (category == "zs") and glyph_code
+ end
+ end
+ return false
+end
+
+function nodes.somepenalty(n,value)
+ if n then
+ local id = n.id
+ if id == penalty_code then
+ if value then
+ return n.penalty == value
+ else
+ return true
+ end
+ end
+ end
+ return false
+end
+
+function nodes.is_display_math(head)
+ local n = head.prev
+ while n do
+ local id = n.id
+ if id == penalty_code then
+ elseif id == glue_code then
+ if n.subtype == abovedisplayshortskip_code then
+ return true
+ end
+ else
+ break
+ end
+ n = n.prev
+ end
+ n = head.next
+ while n do
+ local id = n.id
+ if id == penalty_code then
+ elseif id == glue_code then
+ if n.subtype == belowdisplayshortskip_code then
+ return true
+ end
+ else
+ break
+ end
+ n = n.next
+ end
+ return false
+end
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