Changed window-system to ediff-window-display.

Converted xemacs *screen* nomenclature to *frame*.
Incorporated overlay strings. Ediff no longer runs under emacs
19.28 and earlier and XEmacs 19.11 and earlier.

diff --git a/lisp/ediff-diff.el b/lisp/ediff-diff.el
index 92a6c938feb0e76b7aece70678bca57d3fe31348..8de42680f7d386efe8a9cf1c9f591301f826ca0c 100644 (file)
--- a/lisp/ediff-diff.el
+++ b/lisp/ediff-diff.el
@@ -81,7 +81,7 @@ Lines that do not match are assumed to be error messages.")
   
 ;;; Fine differences 
 
-(ediff-defvar-local ediff-auto-refine (if window-system 'on 'nix)
+(ediff-defvar-local ediff-auto-refine (if (ediff-window-display-p) 'on 'nix)
   "If `on', Ediff auto-highlights fine diffs for the current diff region.
 If `off', auto-highlighting is not used. If `nix', no fine diffs are shown
 at all, unless the user force-refines the region by hitting `*'.
@@ -131,7 +131,7 @@ one optional arguments, diff-number to refine.")
 ;; ediff-setup-diff-regions3, which takes 4 arguments.
 (defun ediff-setup-diff-regions (file-A file-B file-C)
   ;; force all minibuffers to display ediff's messages.
-  ;; when xemacs implements minibufferless screens, this won't be necessary
+  ;; when xemacs implements minibufferless frames, this won't be necessary
   (if ediff-xemacs-p (setq synchronize-minibuffers t))
                                                  
   (or (ediff-buffer-live-p ediff-diff-buffer)
@@ -476,12 +476,13 @@ one optional arguments, diff-number to refine.")
       (ediff-overlay-put overlay 'ediff-diff-num current-diff)
       (ediff-overlay-put 
        overlay 'insert-in-front-hooks '(ediff-insert-in-front))
-      (ediff-overlay-put
-       overlay 'face (if (ediff-odd-p current-diff)
-                        (intern 
-                         (format "ediff-odd-diff-face-%S-var" buf-type))
-                      (intern
-                       (format "ediff-even-diff-face-%S-var" buf-type))))
+      (if (ediff-window-display-p)
+         (ediff-overlay-put
+          overlay 'face (if (ediff-odd-p current-diff)
+                            (intern 
+                             (format "ediff-odd-diff-face-%S-var" buf-type))
+                          (intern
+                           (format "ediff-even-diff-face-%S-var" buf-type)))))
 
       (if (= 0 (mod current-diff 10))
          (message "Buffer %S: Processing difference region %d of %d"
@@ -678,7 +679,7 @@ one optional arguments, diff-number to refine.")
     
 ;; if fine diff vector is not set for diff N, then do nothing
 (defun ediff-set-fine-diff-properties (n &optional default)
-  (or (not window-system)
+  (or (not (ediff-window-display-p))
       (< n 0)
       (>= n ediff-number-of-differences)
       ;; in a window system, set faces and priorities of fine overlays
@@ -951,7 +952,7 @@ one optional arguments, diff-number to refine.")
 (defun ediff-setup-diff-regions3 (file-A file-B file-C)
   
   ;; force all minibuffers to display ediff's messages.
-  ;; when xemacs implements minibufferless screens, this won't be necessary
+  ;; when xemacs implements minibufferless frames, this won't be necessary
   (if ediff-xemacs-p (setq synchronize-minibuffers t))
                                                  
   (or (ediff-buffer-live-p ediff-diff-buffer)