diff options
Diffstat (limited to 'tex/context/base/node-aux.lua')
| -rw-r--r-- | tex/context/base/node-aux.lua | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/tex/context/base/node-aux.lua b/tex/context/base/node-aux.lua index 7f4b0342a..499116258 100644 --- a/tex/context/base/node-aux.lua +++ b/tex/context/base/node-aux.lua @@ -49,6 +49,7 @@ local copy_node_list = nuts.copy_list local find_tail = nuts.tail local insert_node_after = nuts.insert_after local isnode = nuts.is_node +local getbox = nuts.getbox local nodes_traverse_id = nodes.traverse_id local nodes_first_glyph = nodes.first_glyph @@ -61,8 +62,52 @@ local unsetvalue = attributes.unsetvalue local current_font = font.current +local texsetbox = tex.setbox + local report_error = logs.reporter("node-aux:error") +-- At some point we figured that copying before using was the safest bet +-- when dealing with boxes at the tex end. This is because tex also needs +-- to manage the grouping (i.e. savestack). However, there is an easy +-- solution that keeps the tex end happy as tex.setbox deals with this. The +-- overhead of one temporary list node is neglectable. +-- +-- function tex.takebox(id) +-- local box = tex.getbox(id) +-- if box then +-- local copy = node.copy(box) +-- local list = box.list +-- copy.list = list +-- box.list = nil +-- tex.setbox(id,nil) +-- return copy +-- end +-- end + +local function takebox(id) + local box = getbox(id) + if box then + local copy = copy_node(box) + local list = getlist(box) + setfield(copy,"list",list) + setfield(box,"list",nil) + texsetbox(id,nil) + return copy + end +end + +function nodes.takebox(id) + local b = takebox(id) + if b then + return tonode(b) + end +end + +nuts.takebox = takebox +tex.takebox = nodes.takebox -- sometimes more clear + +-- so far + local function repackhlist(list,...) local temp, b = hpack_nodes(list,...) list = getlist(temp) |