sile-typesetter / sile / 7246678005

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/packages/unichar/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 = "unichar"




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function package:registerCommands ()




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  self:registerCommand("unichar", function(_, content)




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    local cp = content[1]




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    if type(cp) ~= "string" then SU.error("Bad argument to \\unicode") end




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    local hlist = SILE.typesetter.state.nodes




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    local char = SU.utf8charfromcodepoint(cp)




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    if #hlist > 1 and hlist[#hlist].is_unshaped




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                  and pl.tablex.deepcompare(hlist[#hlist].options, SILE.font.loadDefaults({})) then




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      -- Stack character with a preceeding unshaped node if its font is the










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      -- same as the current one, so that combining characters (e.g. diacritics)










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      -- and kerning works with \unichar'ed code points too.










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      hlist[#hlist].text = hlist[#hlist].text .. char




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    else










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      SILE.typesetter:typeset(char)




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    end










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  end)










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end










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package.documentation = [[










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\begin{document}










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\use[module=packages.unichar]










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SILE is Unicode compatible, and expects its input files to be in the UTF-8 encoding.










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(The actual range of Unicode characters supported will depend on the supported ranges of the fonts that SILE is using to typeset.)










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Some Unicode characters are hard to locate on a standard keyboard, and so are difficult to enter into SILE documents.










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The \autodoc:package{unichar} package helps with this problem by providing the \autodoc:command{\unichar} command to enter Unicode codepoints.










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










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\unichar{U+263A}










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\end{raw}










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This produces: \font[family=Symbola]{\unichar{U+263A}}










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If the argument to \autodoc:command{\unichar} begins with \code{U+}, \code{u+}, \code{0x}, or \code{0X}, then it is assumed to be a hexadecimal value.










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Otherwise it is assumed to be a decimal codepoint.










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\end{document}










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]]




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return package




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