sile-typesetter / sile / 7246678005

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85.71
/packages/raiselower/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 = "raiselower"




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local function raise (height, content)










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  SILE.typesetter:pushHbox({




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    outputYourself = function (_, typesetter, _)










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      typesetter.frame:advancePageDirection(-height)




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    end










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  })










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  SILE.process(content)




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  SILE.typesetter:pushHbox({




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    outputYourself = function (_, typesetter, _)










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      if (type(typesetter.state.cursorY)) == "table" then




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        typesetter.state.cursorY = typesetter.state.cursorY.length




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      end










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      typesetter.frame:advancePageDirection(height)




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    end










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  })










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end










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function package:registerCommands ()




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  self:registerCommand("raise", function (options, content)




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    local height = SU.cast("measurement", options.height)




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    raise(height:absolute(), content)




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  end, "Raises the contents of the command by the amount specified in the <height> option")




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  self:registerCommand("lower", function (options, content)




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    local height = SU.cast("measurement", options.height)




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    raise(-height:absolute(), content)




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  end, "Lowers the contents of the command by the amount specified in the <height> option")




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end










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package.documentation = [[










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\begin{document}










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If you don’t want your images, rules, or text to be placed along the baseline, you can use the \autodoc:package{raiselower} package to move them up and down.










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It provides two simple commands, \autodoc:command{\raise} and \autodoc:command{\lower}, which both take a \autodoc:parameter{height=<dimension>} parameter.










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They will respectively raise or lower their argument by the given height.










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The raised or lowered content will not alter the height or depth of the line.










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Here is some text raised by \raise[height=3pt]{three points}; here is some text lowered by \lower[height=4pt]{four points}.










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The previous paragraph was generated by:










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\begin[type=autodoc:codeblock]{raw}










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Here is some text raised by \raise[height=3pt]{three points}; here is some text lowered by \lower[height=4pt]{four points}.










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\end{raw}










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\end{document}










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]]




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return package




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