[Lazarus] Improving IDE Internationalization

[Marcelo B de Paula]

>Anyway. What i'd like to say is that current implementation is working
>with both 2.2.4 and 2.4.0 (or later) versions of the compiler. And
>supports translated messages correctly.

Yes, i think that this modification can be tagged to a new release of 
compiler and ide.

About translate messages working correctly on prior versions, i cannot 
confirm.
If i change compiler messages by loading another errorxx.msg in IDE or use a 
different errorxx.msg
to compile the compiler itself, the first thing i´ve noticed is that 
QuickFixItems stop working,
and message icons on message view form do not show correctly.

That´s because Quickfixitems and MessageView are comparing const strings in 
english only.

Excerpts:

  Result:=(Line.Parts<>nil)
          and (System.Pos(') Fatal: Can''t find unit ',Line.Msg)>0);

  if REMatches(Msg.Msg,'Can''t find unit ([a-z_0-9]+) used by 
([a-z_0-9]+)','I') then begin

------

const
  cHint         = 'Hint: User defined:';
  cNote         = 'Note: User defined:';
  cWarning      = 'Warning: User defined:';
  clMsgHint     = clBlue;
  clMsgNote     = clGreen;
  clMsgWarning  = clRed;
  cLeftSpacer   = 0;
...
  if not (cdsSelected in State)
  then begin
    TheText := Node.Text;
    if Pos(cNote, TheText) > 0 then
      ChangeFontColor(clMsgNote)
    else if Pos(cHint, TheText) > 0 then
      ChangeFontColor(clMsgHint)
    else if Pos(cWarning, TheText) > 0 then
      ChangeFontColor(clMsgWarning);
  end;

So, after changing TOutputFilter, there are much to do before using a custom 
language correctly.

Regards,
Marcelo