The library libipelua implements Lua bindings for many classes in Ipelib. If it is installed properly, it should suffice to say
require "ipe"
in Lua to make use of these bindings.
These pages document the Lua bindings to Ipelib:
When writing Ipelets in Lua, you have access to additional methods provided by the Ipe program itself:
Here is a Lua script that reads an Ipe document and then recenters each page on the paper:
-- recenter.lua -- center objects on each page of the document require "ipe" inname, outname = ... if not outname then io.stderr.write("Usage: recenter.lua <inputfile> <outputfile>\n") return end doc = assert(ipe.Document(inname)) -- make sure we have size information for text assert(doc:runLatex()) layout = doc:styleSheet():find("layout") fs = layout.framesize for i,p in doc:pages() do box = ipe.Rect() for j = 1,#p do box:add(p:bbox(j)) end nx = (fs.x - box:width()) / 2 ny = (fs.y - box:height()) / 2 trans = ipe.Vector(nx, ny) - box:bottomLeft() m = ipe.Translation(trans) for j = 1,#p do p:transform(j, m) end end doc:save(outname)
Here is a small Lua script that takes an Ipe document and exports each view separately in EPS format:
-- splitviews.lua -- export each view of an Ipe document separately require "ipe" fname = ... if not fname then io.stderr:write("Usage: splitviews.lua <file>\n") return end i = fname:find("%.[^.]+$") if i then epsname = fname:sub(1,i-1) else epsname = fname end doc = assert(ipe.Document(fname)) -- need latex information to save as Postscript assert(doc:runLatex()) for i,p in doc:pages() do io.stderr:write("Saving page " .. i .. "\n") for j = 1, p:countViews() do out = epsname .. "-" .. i .. "-" .. j .. ".eps" io.stderr:write("Saving view " .. i .. "-" .. j .. " as " .. out .. "\n") doc:exportView(out, "eps", nil, i, j) end end