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Dir : ~/usr/share/Macaulay2/Core/

Edit File: printing.m2

needs "max.m2"
needs "methods.m2"

pad = method()

pad(String,ZZ) := String => (s,n) -> concatenate(s,n-# s)
pad(ZZ,String) := String => (n,s) -> concatenate(n-# s,s)
pad(Net, ZZ) := (S, n) -> S | (concatenate(n - width S))^(-depth S)
pad(ZZ, Net) := (n, S) -> (concatenate(n - width S))^(height S - 1) | S

columnate = (wid,items) -> (
     lens := apply(items,i -> #i);
     ncols := (wid+1) // (max lens + 1);
     if ncols === 0 then ncols = 1;
     nrows := (# items + ncols - 1)//ncols;
     local newcols;
     local newrows;
     while (
	  ncols < # items and (
	       newcols = ncols+1;
	       newrows = (# items + ncols - 1)//newcols;
	       wid >= newcols - 1 + sum apply(pack(newrows, lens), max)
	       )
	  ) do (
	  ncols = newcols;
	  nrows = newrows;
	  );
     horizontalJoin between(" ", apply(pack(nrows,items), col -> stack col)))

net Time := v -> (
     t := "-- " | toString v#0 | " seconds";
     x := v#1;
     if x === null then t else net x || t
     )

truncateOutput = method()
truncateOutput ZZ := maxwidth -> (
     Nothing#{Standard,BeforePrint} = identity;
     Thing#{Standard,BeforePrint} = x -> (
	  x = net x;
	  if width x <= maxwidth then return x;
	  stack apply( unstack x, row -> (
		    if #row <= maxwidth then return row;
		    concatenate(substring(0,maxwidth - 4,row), " ..."))));
     )
truncateOutput InfiniteNumber := maxwidth -> Thing#{Standard,BeforePrint} = identity

-- not printing:
unbag = method()
unbag Bag := x -> unsequence toSequence x
bagText := x -> (
     if #x===0 then "an empty bag"
     else if #x===1 then "a bagged " | synonym class first x
     else "a bagged sequence of length " | toString(#x)
     )
net Bag := toString Bag := x -> "-*" | bagText x | "*-"
html Bag := x -> htmlLiteral bagText x

-- Local Variables:
-- compile-command: "make -C $M2BUILDDIR/Macaulay2/m2 "
-- End: