casile 0.14.4

The command line interface to the CaSILE toolkit, a book publishing workflow employing SILE and other wizardry
Documentation 
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local base = require("packages.base")

local package = pl.class(base)
package._name = "covers"

local color = "#FFFFFF"

function package:_init ()
   base._init(self)
   self:loadPackage("markdown")
end

function package:registerCommands ()
   self:registerCommand("frontcover", function (_, _)
      SILE.call("color", { color = color }, function ()
         SILE.call("center", {}, function ()
            SILE.call("topfill")
            SILE.call("cabook:font:title", { size = "8%fmed" }, function ()
               SILE.call("wraptitle", {}, { CASILE.metadata.title })
            end)
            SILE.call("skip", { height = "7%pmin" })
            SILE.call("cabook:font:subtitle", { size = "5%fmed" }, function ()
               SILE.call("wrapsubtitle", {}, { CASILE.metadata.subtitle })
            end)
            SILE.call("vfill")
            SILE.call("vfill")
            if CASILE.metadata.creator then
               SILE.call("cabook:font:author", { size = "6%fmed", weight = 300 }, { CASILE.metadata.creator[1].text })
            end
         end)
         SILE.call("par")
         SILE.call("vfill")
         SILE.call("framebreak")
      end)
   end)

   self:registerCommand("backcover", function (_, _)
      SILE.call("noindent")
      SILE.call("color", { color = color }, function ()
         SILE.typesetter:leaveHmode()
         SILE.settings:set("linebreak.emergencyStretch", SILE.types.length("2spc"))
         SILE.settings:set("document.lskip", "7%ph")
         SILE.settings:set("document.rskip", "7%ph")
         SILE.call("skip", { height = "7%ph" })
         SILE.settings:temporarily(function ()
            SILE.call("font", { size = "5.2%fw", weight = "600" })
            SILE.settings:set("linespacing.method", "fit-font")
            SILE.settings:set("linespacing.fit-font.extra-space", SILE.types.length("0.6ex"))
            CASILE.dropcapNextLetter()
            SILE.processMarkdown(SU.ast.contentToString(CASILE.metadata.abstract or ""))
            SILE.call("par")
            if CASILE.metadata.creator then
               SILE.call("raggedleft", {}, function ()
                  SILE.call("em", {}, { CASILE.metadata.creator[1].text })
               end)
            end
         end)
         SILE.call("skip", { height = "8%pmin" })
         SILE.call("par")
         SILE.settings:temporarily(function ()
            SILE.settings:set("linespacing.method", "fit-font")
            SILE.settings:set("linespacing.fit-font.extra-space", SILE.types.length("0.32ex"))
            SILE.call("cabook:font:sans", { size = "3.4%fw", weight = 600 })
            SILE.settings:set("document.lskip", SILE.types.node.glue("82pt"))
            if CASILE.metadata.creator then
               SILE.process({ CASILE.metadata.creator[1].about })
            end
            SILE.call("par")
         end)
         SILE.call("par")
         SILE.call("vfill")
         SILE.call("framebreak")
      end)
   end)

   self:registerCommand("spine", function (_, _)
      SILE.call("noindent")
      SILE.call("color", { color = color }, function ()
         SILE.call("topfill")
         SILE.settings:set("current.parindent", 0)
         SILE.settings:set("document.lskip", "5%ph")
         SILE.settings:set("document.rskip", "10%ph")
         SILE.call("raise", { height = ".18bs" }, function () -- Balance visual center of assenders
            SILE.call("cabook:font:title", { size = "80%fh" }, { CASILE.metadata.title })
            SILE.call("hfill")
            if CASILE.metadata.creator then
               SILE.call("cabook:font:author", { size = "50%fh" }, { CASILE.metadata.creator[1].text })
            end
         end)
         SILE.call("par")
      end)
      SILE.call("framebreak")
      SILE.typesetter:leaveHmode()
   end)
end

return package