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sile-typesetter / sile / 10616897127

29 Aug 2024 02:18PM UTC coverage: 61.736% (+2.4%) from 59.298%
10616897127

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Merge pull request #2095 from alerque/class-post-init

2 of 2 new or added lines in 2 files covered. (100.0%)

451 existing lines in 66 files now uncovered.

10763 of 17434 relevant lines covered (61.74%)

2586.56 hits per line

Source File
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84.69
/inputters/sil.lua
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local base = require("inputters.base")
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local _variant = "epnf"
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local parser
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local function load_parser ()
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   parser = require("inputters.sil-" .. _variant)
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end
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local inputter = pl.class(base)
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inputter._name = "sil"
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inputter.order = 50
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inputter.appropriate = function (round, filename, doc)
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   if not parser then
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      load_parser()
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   end
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   if round == 1 then
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      return filename:match(".sil$")
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   elseif round == 2 then
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      local sniff = doc:sub(1, 100)
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      local promising = sniff:match("\\begin") or sniff:match("\\document") or sniff:match("\\sile")
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      return promising and inputter.appropriate(3, filename, doc) or false
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   elseif round == 3 then
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      local status, _ = pcall(parser, doc)
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      return status
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   end
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end
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function inputter:_init (options)
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   options = options or {}
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   if options.variant then
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      _variant = options.variant
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      load_parser()
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   else
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      if not parser then
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         load_parser()
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      end
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   end
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   -- Save time when parsing strings by only setting up the grammar once per
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   -- instantiation then re-using it on every use.
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   self._parser = parser
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   base._init(self)
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end
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local linecache = {}
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local lno, col, lastpos
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local function resetCache ()
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   lno = 1
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   col = 1
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   lastpos = 0
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   linecache = { { lno = 1, pos = 1 } }
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end
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local function getline (str, pos)
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   local start = 1
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   lno = 1
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   if pos > lastpos then
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      lno = linecache[#linecache].lno
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      start = linecache[#linecache].pos + 1
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      col = 1
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   else
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      for j = 1, #linecache - 1 do
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         if linecache[j + 1].pos >= pos then
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            lno = linecache[j].lno
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            col = pos - linecache[j].pos
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            return lno, col
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         end
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      end
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   end
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   for i = start, pos do
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      if string.sub(str, i, i) == "\n" then
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         lno = lno + 1
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         col = 1
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         linecache[#linecache + 1] = { pos = i, lno = lno }
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         lastpos = i
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      end
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      col = col + 1
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   end
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   return lno, col
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end
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local function massage_ast (tree, doc)
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   if type(tree) == "string" then
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      return tree
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   end
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   if tree.pos then
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      tree.lno, tree.col = getline(doc, tree.pos)
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      tree.pos = nil
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   end
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   SU.debug("inputter", "Processing ID:", tree.id)
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   if false or tree.id == "comment" then
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      SU.debug("inputter", "Discarding comment:", pl.stringx.strip(tree[1]))
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      return {}
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   elseif
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      false
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      or tree.id == "document"
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      or tree.id == "braced_content"
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      or tree.id == "passthrough_content"
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      or tree.id == "braced_passthrough_content"
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      or tree.id == "env_passthrough_content"
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   then
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      SU.debug("inputter", "Re-massage subtree", tree.id)
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      return massage_ast(tree[1], doc)
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   elseif
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      false
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      or tree.id == "text"
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      or tree.id == "passthrough_text"
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      or tree.id == "braced_passthrough_text"
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      or tree.id == "env_passthrough_text"
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   then
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      SU.debug("inputter", "  - Collapse subtree")
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      return tree[1]
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   elseif false or tree.id == "content" or tree.id == "environment" or tree.id == "command" then
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      SU.debug("inputter", "  - Massage in place", tree.id)
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      for key, val in ipairs(tree) do
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         SU.debug("inputter", "    -", val.id)
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         if val.id == "content" then
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            SU.splice(tree, key, key, massage_ast(val, doc))
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         elseif val.id then -- requiring an id discards nodes with no content such as comments
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            tree[key] = massage_ast(val, doc)
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         end
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      end
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      return tree
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   end
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end
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function inputter:parse (doc)
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   local status, result = pcall(self._parser, doc)
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   if not status then
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      return SU.error(([[Unable to parse input document to an AST tree. Parser error:
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%s  thrown from document beginning]]):format(pl.stringx.indent(result, 6)))
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   end
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   resetCache()
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   local top = massage_ast(result[1], doc)
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   local tree
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   -- Content not part of a tagged command could either be part of a document
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   -- fragment or junk (e.g. comments, whitespace) outside of a document tag. We
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   -- need to either capture the document tag only or decide this is a fragment
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   -- and wrap it in a document tag.
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   for _, leaf in ipairs(top) do
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      if leaf.command and (leaf.command == "document" or leaf.command == "sile") then
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         tree = leaf
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         break
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      end
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   end
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   -- In the event we didn't isolate a top level document tag above, assume this
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   -- is a fragment and wrap it in one.
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   if not tree then
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      tree = { top, command = "document" }
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   end
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   -- SU.dump(tree)
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   return { tree }
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end
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return inputter
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