bug#260: delphi-mode does not properly format interface definitions

[Simon South <ssouth@slowcomputing.org>]

A bug snuck through in my original patch.  I've pasted a fixed version 
below.

What the patch does is make delphi-mode indent by default after the 
"interface" keyword.  This works fine for interface definitions and 
actually works fairly well overall, since the keywords that typically 
follow "interface" used in the other sense (like "uses" and "type") 
cancel the indentation and give the intended formatting.  However, it 
fails when "interface" is used as a unit separator and followed by 
"function" or "procedure", for instance.


*** delphi.el.orig	Thu May 15 17:57:29 2008
--- delphi.el	Fri May 16 12:19:25 2008
***************
*** 262,271 ****
   (defconst delphi-decl-sections '(type const var label resourcestring)
     "Denotes the start of a declaration section.")

   (defconst delphi-class-types '(class object)
     "Class types.")

! (defconst delphi-composite-types `(,@delphi-class-types record)
     "Types that contain declarations within them.")

   (defconst delphi-unit-sections
--- 262,275 ----
   (defconst delphi-decl-sections '(type const var label resourcestring)
     "Denotes the start of a declaration section.")

+ (defconst delphi-interface-types '(dispinterface interface)
+   "Interface types.")
+
   (defconst delphi-class-types '(class object)
     "Class types.")

! (defconst delphi-composite-types
!   `(,@delphi-class-types ,@delphi-interface-types record)
     "Types that contain declarations within them.")

   (defconst delphi-unit-sections
***************
*** 859,866 ****
         (delphi-stmt-line-indent-of token delphi-indent-level))))

   (defun delphi-composite-type-start (token last-token)
!   ;; Returns true (actually the last-token) if the pair equals (= 
class) or (=
!   ;; record), and nil otherwise.
     (if (and (eq 'equals (delphi-token-kind token))
              (delphi-is (delphi-token-kind last-token) 
delphi-composite-types))
         last-token))
--- 863,870 ----
         (delphi-stmt-line-indent-of token delphi-indent-level))))

   (defun delphi-composite-type-start (token last-token)
!   ;; Returns true (actually the last-token) if the pair equals (= 
class), (=
!   ;; interface), or (= record), and nil otherwise.
     (if (and (eq 'equals (delphi-token-kind token))
              (delphi-is (delphi-token-kind last-token) 
delphi-composite-types))
         last-token))
***************
*** 1252,1258 ****
             (throw 'done (delphi-line-indent-of token 0)))

            ;; Unit statements mean we indent right to the left.
!          ((delphi-is token-kind delphi-unit-statements) (throw 'done 0))
            )
           (unless (delphi-is token-kind delphi-whitespace)
              (setq last-token token))
--- 1256,1264 ----
             (throw 'done (delphi-line-indent-of token 0)))

            ;; Unit statements mean we indent right to the left.
!          ((and (delphi-is token-kind delphi-unit-statements)
!                (not (delphi-composite-type-start token last-token)))
!           (throw 'done 0))
            )
           (unless (delphi-is token-kind delphi-whitespace)
              (setq last-token token))
***************
*** 1351,1357 ****
                                            delphi-indent-level)))

            ;; In unit sections we indent right to the left.
!          ((delphi-is token-kind delphi-unit-sections) (throw 'done 0))

            ;; A previous terminator means we can stop.
            ((delphi-is token-kind delphi-previous-terminators)
--- 1357,1365 ----
                                            delphi-indent-level)))

            ;; In unit sections we indent right to the left.
!          ((and (delphi-is token-kind delphi-unit-sections)
!                (not (delphi-is token-kind delphi-interface-types)))
!           (throw 'done 0))

            ;; A previous terminator means we can stop.
            ((delphi-is token-kind delphi-previous-terminators)
***************
*** 1457,1463 ****
                      ;; Indent to the matching start ( or [.
                      (delphi-indent-of (delphi-group-start token)))

!                   ((delphi-is token-kind delphi-unit-statements) 0)

                     ((delphi-is token-kind delphi-comments)
                      ;; In a comment.
--- 1465,1474 ----
                      ;; Indent to the matching start ( or [.
                      (delphi-indent-of (delphi-group-start token)))

!                   ((and (delphi-is token-kind delphi-unit-statements)
!                         (not
!                          (delphi-is token-kind delphi-interface-types)))
!                    0)

                     ((delphi-is token-kind delphi-comments)
                      ;; In a comment.