sile-typesetter / sile / 14390735465

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14390735465

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Merge tag 'v0.15.12' into develop

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0.0
/packages/complex-spaces/init.lua
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local base = require("packages.base")
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local package = pl.class(base)




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package._name = "complex-spaces"




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local makeSpaceNode = function (self, options, item)










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   if SILE.settings:get("shaper.complexspaces") then




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      local myoptions = pl.tablex.deepcopy(options)




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      myoptions.language = "x-spaces-are-nodes"




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      local nnodes = self:createNnodes(" ", myoptions)




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      return SILE.types.node.discretionary({ replacement = nnodes })




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   end











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   return self:noncomplex_SpaceNode(options, item)




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end










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function package:_init ()




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   base._init(self)




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   if not SILE.languageSupport.languages["x-spaces-are-nodes"] then




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      local xsan = pl.class(SILE.nodeMakers.unicode)




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      function xsan.makeGlue (node, item)




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         node:addToken(" ", item)




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         node:makeToken()




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      end










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      SILE.nodeMakers["x-spaces-are-nodes"] = xsan




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      SILE.languageSupport.languages["x-spaces-are-nodes"] = true




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   end











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   if SILE.shaper and not SILE.shaper.noncomplex_SpaceNode then




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      SILE.shaper.noncomplex_SpaceNode = SILE.shaper.makeSpaceNode




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      SILE.shaper.makeSpaceNode = makeSpaceNode




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   end










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end










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function package:declareSettings ()




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   SILE.settings:declare({




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      parameter = "shaper.complexspaces",










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      default = true,










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      type = "boolean",










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      help = "Whether the font's space glyph should be emitted, rather than a glue",










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   })










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end










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package.documentation = [[










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\begin{document}










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SILE normally assumes that the "space" character in a font is empty, and that it can be replaced with a stretchable and shrinkable space.










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In some fonts (particularly color fonts), this is not a reliable assumption, and the space character may actually contain ink.










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Loading this package will allow such space glyphs to be correctly rendered.










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(At some point in the future, SILE will detect fonts with complex spaces and load this package automatically, but for now it needs to be manually loaded.)










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\end{document}










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]]




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return package




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