Ipelib
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The library libipelua implements Lua bindings for many classes in Ipelib. The bindings are available in Lua ipelets, as well as in Lua scripts executed using the ipescript program.
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. You can run this script as "ipescript recenter".
-- recenter.lua -- center objects on each page of the document if #argv ~= 2 then io.stderr:write("Usage: ipescript recenter <inputfile> <outputfile>\n") return end inname = argv[1] outname = argv[2] doc = assert(ipe.Document(inname)) -- make sure we have size information for text assert(doc:runLatex()) layout = doc:sheets():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 if #argv ~= 1 then io.stderr:write("Usage: ipescript splitviews <file>\n") return end fname = argv[1] 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
For more examples, have a look at the scripts in your Ipe installation, such as add-style.lua or update-styles.lua.