Editor Macro Column Align Source

From Lazarus wiki

Please see Editor Macros PascalScript for info how to use PascalScript Macros in the IDE Source editor.

The macro shown below aligns selected code to a specific token. It looks for a specific token in each selected line, and aligns each occurrence of it.

Select the 3 lines. If the selection starts right before the ":" then the ":" will be detected. A prompt will ask you to confirm the ":". Then all ":" will be aligned. (If you use a word for alignment, please note, that it will be matched regardless of word boundaries)

  text: string;
  a: Integer;
  foo: boolean

The macro:

function IsIdent(c: Char): Boolean;
  Result := ((c >= 'a') and (c <= 'z')) or
            ((c >= 'A') and (c <= 'Z')) or
            ((c >= '0') and (c <= '9')) or
            (c = '_');

  p1, p2: TPoint;
  s1, s2: string;
  i, j, k: Integer;
  if not Caller.SelAvail then exit;
  p1 := Caller.BlockBegin;
  p2 := Caller.BlockEnd;
  if (p1.y > p2.y) or ((p1.y = p2.y) and (p1.x > p2.x)) then begin
    p1 := Caller.BlockEnd;
    p2 := Caller.BlockBegin;
  s1 := Caller.Lines[p1.y - 1];
  s2 := '';
  i := p1.x
  while (i <= length(s1)) and (s1[i] in [#9, ' ']) do inc(i);
  j := i;
  if i <= length(s1) then begin
    if IsIdent(s1[i]) then // pascal identifier
      while (i <= length(s1)) and IsIdent(s1[i]) do inc(i)
      while (i <= length(s1)) and not(IsIdent(s1[i]) or (s1[i] in [#9, ' '])) do inc(i);
  if i > j then s2 := copy(s1, j, i-j);

  if not InputQuery( 'Align', 'Token', s2) then exit;

  j := 0;
  for i := p1.y to p2.y do begin
    s1 := Caller.Lines[i - 1];
    k := pos(s2, s1);
    if (k > j) then j := k;
  if j < 1 then exit;

  for i := p1.y to p2.y do begin
    s1 := Caller.Lines[i - 1];
    k := pos(s2, s1);
    if (k > 0) and (k < j) then begin
      Caller.LogicalCaretXY := Point(k, i);
      while k < j do begin
        ecChar(' ');


See also