(LD_SWITCH_SYSTEM): Undo previous change.

[bpt/emacs.git] / src / cmds.c

diff --git a/src/cmds.c b/src/cmds.c
index 9dfd2b4..e6ceeee 100644 (file)
--- a/src/cmds.c
+++ b/src/cmds.c
@@ -1,5 +1,5 @@
 /* Simple built-in editing commands.
-   Copyright (C) 1985, 1992 Free Software Foundation, Inc.
+   Copyright (C) 1985, 1993 Free Software Foundation, Inc.
 
 This file is part of GNU Emacs.
 
@@ -18,7 +18,7 @@ along with GNU Emacs; see the file COPYING.  If not, write to
 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
 
 
-#include "config.h"
+#include <config.h>
 #include "lisp.h"
 #include "commands.h"
 #include "buffer.h"
@@ -26,7 +26,9 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
 
 Lisp_Object Qkill_forward_chars, Qkill_backward_chars, Vblink_paren_function;
 
-int overwrite_binary_mode;
+/* A possible value for a buffer's overwrite-mode variable.  */
+Lisp_Object Qoverwrite_mode_binary;
+
 \f
 DEFUN ("forward-char", Fforward_char, Sforward_char, 0, 1, "p",
   "Move point right ARG characters (left if ARG negative).\n\
@@ -39,17 +41,28 @@ On reaching end of buffer, stop and signal error.")
   else
     CHECK_NUMBER (n, 0);
 
-  SET_PT (point + XINT (n));
-  if (point < BEGV)
-    {
-      SET_PT (BEGV);
-      Fsignal (Qbeginning_of_buffer, Qnil);
-    }
-  if (point > ZV)
-    {
-      SET_PT (ZV);
-      Fsignal (Qend_of_buffer, Qnil);
-    }
+  /* This used to just set point to point + XINT (n), and then check
+     to see if it was within boundaries.  But now that SET_PT can
+     potentially do a lot of stuff (calling entering and exiting
+     hooks, etcetera), that's not a good approach.  So we validate the
+     proposed position, then set point.  */
+  {
+    int new_point = point + XINT (n);
+
+    if (new_point < BEGV)
+      {
+       SET_PT (BEGV);
+       Fsignal (Qbeginning_of_buffer, Qnil);
+      }
+    if (new_point > ZV)
+      {
+       SET_PT (ZV);
+       Fsignal (Qend_of_buffer, Qnil);
+      }
+
+    SET_PT (new_point);
+  }
+
   return Qnil;
 }
 
@@ -92,7 +105,7 @@ With positive ARG, a non-empty line at the end counts as one line\n\
     }
 
   negp = count <= 0;
-  pos = scan_buffer ('\n', pos2, count - negp, &shortage);
+  pos = scan_buffer ('\n', pos2, count - negp, &shortage, 1);
   if (shortage > 0
       && (negp
          || (ZV > BEGV
@@ -228,10 +241,10 @@ In Auto Fill mode, if no numeric arg, break the preceding line if it's long.")
   arg = Fprefix_numeric_value (arg1);
 
   if (!NILP (current_buffer->read_only))
-    Fsignal (Qbuffer_read_only, Qnil);
+    Fbarf_if_buffer_read_only ();
 
   /* Inserting a newline at the end of a line produces better
-     redisplay in try_window_id than inserting at the ebginning fo a
+     redisplay in try_window_id than inserting at the beginning of a
      line, and the textual result is the same.  So, if we're at
      beginning of line, pretend to be at the end of the previous line.  
 
@@ -240,6 +253,15 @@ In Auto Fill mode, if no numeric arg, break the preceding line if it's long.")
      features all do nothing in that case.  */
 
   flag = point > BEGV && FETCH_CHAR (point - 1) == '\n';
+#ifdef USE_TEXT_PROPERTIES
+  /* We cannot use this optimization if properties change
+     in the vicinity.
+     ??? We need to check for change hook properties, etc.  */
+  if (flag)
+    if (! (point - 1 > BEGV && ! property_change_between_p (point - 2, point)))
+      flag = 0;
+#endif
+
   if (flag)
     SET_PT (point - 1);
 
@@ -273,14 +295,16 @@ internal_self_insert (c1, noautofill)
   Lisp_Object tem;
   register enum syntaxcode synt;
   register int c = c1;
+  Lisp_Object overwrite = current_buffer->overwrite_mode;
 
   if (!NILP (Vbefore_change_function) || !NILP (Vafter_change_function))
     hairy = 1;
 
-  if (!NILP (current_buffer->overwrite_mode)
+  if (!NILP (overwrite)
       && point < ZV
-      && (overwrite_binary_mode || (c != '\n' && FETCH_CHAR (point) != '\n'))
-      && (overwrite_binary_mode
+      && (EQ (overwrite, Qoverwrite_mode_binary)
+         || (c != '\n' && FETCH_CHAR (point) != '\n'))
+      && (EQ (overwrite, Qoverwrite_mode_binary)
          || FETCH_CHAR (point) != '\t'
          || XINT (current_buffer->tab_width) <= 0
          || XFASTINT (current_buffer->tab_width) > 20
@@ -336,11 +360,8 @@ syms_of_cmds ()
   Qkill_forward_chars = intern ("kill-forward-chars");
   staticpro (&Qkill_forward_chars);
 
-  DEFVAR_BOOL ("overwrite-binary-mode", &overwrite_binary_mode,
-    "*Non-nil means overwrite mode treats tab and newline normally.\n\
-Ordinarily, overwriting preserves a tab until its whole width is overwritten\n\
-and never replaces a newline.");
-  overwrite_binary_mode = 1;
+  Qoverwrite_mode_binary = intern ("overwrite-mode-binary");
+  staticpro (&Qoverwrite_mode_binary);
 
   DEFVAR_LISP ("blink-paren-function", &Vblink_paren_function,
     "Function called, if non-nil, whenever a close parenthesis is inserted.\n\
@@ -368,6 +389,12 @@ keys_of_cmds ()
   initial_define_key (global_map, Ctl('I'), "self-insert-command");
   for (n = 040; n < 0177; n++)
     initial_define_key (global_map, n, "self-insert-command");
+#ifdef MSDOS
+  for (n = 0200; n < 0240; n++)
+    initial_define_key (global_map, n, "self-insert-command");
+#endif
+  for (n = 0240; n < 0400; n++)
+    initial_define_key (global_map, n, "self-insert-command");
 
   initial_define_key (global_map, Ctl ('A'), "beginning-of-line");
   initial_define_key (global_map, Ctl ('B'), "backward-char");