/* Simple built-in editing commands.
- Copyright (C) 1985, 1992 Free Software Foundation, Inc.
+ Copyright (C) 1985, 93, 94, 95, 96, 97, 1998 Free Software Foundation, Inc.
This file is part of GNU Emacs.
You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING. If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
-#include "config.h"
+#include <config.h>
#include "lisp.h"
#include "commands.h"
#include "buffer.h"
+#include "charset.h"
#include "syntax.h"
+#include "window.h"
+#include "keyboard.h"
+#include "dispextern.h"
Lisp_Object Qkill_forward_chars, Qkill_backward_chars, Vblink_paren_function;
+/* A possible value for a buffer's overwrite-mode variable. */
+Lisp_Object Qoverwrite_mode_binary;
+
+/* Non-nil means put this face on the next self-inserting character. */
+Lisp_Object Vself_insert_face;
+
+/* This is the command that set up Vself_insert_face. */
+Lisp_Object Vself_insert_face_command;
+
+extern Lisp_Object Qface;
\f
+DEFUN ("forward-point", Fforward_point, Sforward_point, 1, 1, 0,
+ "Return buffer position N characters after (before if N negative) point.")
+ (n)
+ Lisp_Object n;
+{
+ CHECK_NUMBER (n, 0);
+
+ return make_number (PT + XINT (n));
+}
+
DEFUN ("forward-char", Fforward_char, Sforward_char, 0, 1, "p",
- "Move point right ARG characters (left if ARG negative).\n\
+ "Move point right N characters (left if N is negative).\n\
On reaching end of buffer, stop and signal error.")
(n)
Lisp_Object n;
{
if (NILP (n))
- XFASTINT (n) = 1;
+ XSETFASTINT (n, 1);
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 = PT + 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;
}
DEFUN ("backward-char", Fbackward_char, Sbackward_char, 0, 1, "p",
- "Move point left ARG characters (right if ARG negative).\n\
+ "Move point left N characters (right if N is negative).\n\
On attempt to pass beginning or end of buffer, stop and signal error.")
(n)
Lisp_Object n;
{
if (NILP (n))
- XFASTINT (n) = 1;
+ XSETFASTINT (n, 1);
else
CHECK_NUMBER (n, 0);
}
DEFUN ("forward-line", Fforward_line, Sforward_line, 0, 1, "p",
- "Move ARG lines forward (backward if ARG is negative).\n\
-Precisely, if point is on line I, move to the start of line I + ARG.\n\
+ "Move N lines forward (backward if N is negative).\n\
+Precisely, if point is on line I, move to the start of line I + N.\n\
If there isn't room, go as far as possible (no error).\n\
Returns the count of lines left to move. If moving forward,\n\
-that is ARG - number of lines moved; if backward, ARG + number moved.\n\
-With positive ARG, a non-empty line at the end counts as one line\n\
+that is N - number of lines moved; if backward, N + number moved.\n\
+With positive N, a non-empty line at the end counts as one line\n\
successfully moved (for the return value).")
(n)
Lisp_Object n;
{
- int pos2 = point;
- int pos;
- int count, shortage, negp;
+ int opoint = PT, opoint_byte = PT_BYTE;
+ int pos, pos_byte;
+ int count, shortage;
+ int temp;
if (NILP (n))
count = 1;
count = XINT (n);
}
- negp = count <= 0;
- pos = scan_buffer ('\n', pos2, count - negp, &shortage);
+ if (count <= 0)
+ shortage = scan_newline (PT, PT_BYTE, BEGV, BEGV_BYTE, count - 1, 1);
+ else
+ shortage = scan_newline (PT, PT_BYTE, ZV, ZV_BYTE, count, 1);
+
+ /* Since scan_newline does TEMP_SET_PT_BOTH,
+ and we want to set PT "for real",
+ go back to the old point and then come back here. */
+ pos = PT;
+ pos_byte = PT_BYTE;
+ TEMP_SET_PT_BOTH (opoint, opoint_byte);
+ SET_PT_BOTH (pos, pos_byte);
+
if (shortage > 0
- && (negp
+ && (count <= 0
|| (ZV > BEGV
- && pos != pos2
- && FETCH_CHAR (pos - 1) != '\n')))
+ && PT != opoint
+ && (FETCH_BYTE (PT_BYTE - 1) != '\n'))))
shortage--;
- SET_PT (pos);
- return make_number (negp ? - shortage : shortage);
+
+ return make_number (count <= 0 ? - shortage : shortage);
}
DEFUN ("beginning-of-line", Fbeginning_of_line, Sbeginning_of_line,
0, 1, "p",
"Move point to beginning of current line.\n\
-With argument ARG not nil or 1, move forward ARG - 1 lines first.\n\
+With argument N not nil or 1, move forward N - 1 lines first.\n\
If scan reaches end of buffer, stop there without error.")
(n)
Lisp_Object n;
{
if (NILP (n))
- XFASTINT (n) = 1;
+ XSETFASTINT (n, 1);
else
CHECK_NUMBER (n, 0);
- Fforward_line (make_number (XINT (n) - 1));
+ SET_PT (XINT (Fline_beginning_position (n)));
return Qnil;
}
DEFUN ("end-of-line", Fend_of_line, Send_of_line,
0, 1, "p",
"Move point to end of current line.\n\
-With argument ARG not nil or 1, move forward ARG - 1 lines first.\n\
+With argument N not nil or 1, move forward N - 1 lines first.\n\
If scan reaches end of buffer, stop there without error.")
(n)
Lisp_Object n;
register int stop;
if (NILP (n))
- XFASTINT (n) = 1;
+ XSETFASTINT (n, 1);
else
CHECK_NUMBER (n, 0);
- if (XINT (n) != 1)
- Fforward_line (make_number (XINT (n) - 1));
-
- pos = point;
- stop = ZV;
- while (pos < stop && FETCH_CHAR (pos) != '\n') pos++;
- SET_PT (pos);
+ SET_PT (XINT (Fline_end_position (n)));
return Qnil;
}
DEFUN ("delete-char", Fdelete_char, Sdelete_char, 1, 2, "p\nP",
- "Delete the following ARG characters (previous, with negative arg).\n\
+ "Delete the following N characters (previous if N is negative).\n\
Optional second arg KILLFLAG non-nil means kill instead (save in kill ring).\n\
-Interactively, ARG is the prefix arg, and KILLFLAG is set if\n\
-ARG was explicitly specified.")
+Interactively, N is the prefix arg, and KILLFLAG is set if\n\
+N was explicitly specified.")
(n, killflag)
Lisp_Object n, killflag;
{
+ int pos;
+
CHECK_NUMBER (n, 0);
+ pos = PT + XINT (n);
if (NILP (killflag))
{
if (XINT (n) < 0)
{
- if (point + XINT (n) < BEGV)
+ if (pos < BEGV)
Fsignal (Qbeginning_of_buffer, Qnil);
else
- del_range (point + XINT (n), point);
+ del_range (pos, PT);
}
else
{
- if (point + XINT (n) > ZV)
+ if (pos > ZV)
Fsignal (Qend_of_buffer, Qnil);
else
- del_range (point, point + XINT (n));
+ del_range (PT, pos);
}
}
else
DEFUN ("delete-backward-char", Fdelete_backward_char, Sdelete_backward_char,
1, 2, "p\nP",
- "Delete the previous ARG characters (following, with negative ARG).\n\
+ "Delete the previous N characters (following if N is negative).\n\
Optional second arg KILLFLAG non-nil means kill instead (save in kill ring).\n\
-Interactively, ARG is the prefix arg, and KILLFLAG is set if\n\
-ARG was explicitly specified.")
+Interactively, N is the prefix arg, and KILLFLAG is set if\n\
+N was explicitly specified.")
(n, killflag)
Lisp_Object n, killflag;
{
+ Lisp_Object value;
+ int deleted_special = 0;
+ int pos, pos_byte, i;
+
CHECK_NUMBER (n, 0);
- return Fdelete_char (make_number (-XINT (n)), killflag);
+
+ /* See if we are about to delete a tab or newline backwards. */
+ pos = PT;
+ pos_byte = PT_BYTE;
+ for (i = 0; i < XINT (n) && pos_byte > BEGV_BYTE; i++)
+ {
+ int c;
+
+ DEC_BOTH (pos, pos_byte);
+ c = FETCH_BYTE (pos_byte);
+ if (c == '\t' || c == '\n')
+ {
+ deleted_special = 1;
+ break;
+ }
+ }
+
+ /* In overwrite mode, back over columns while clearing them out,
+ unless at end of line. */
+ if (XINT (n) > 0
+ && ! NILP (current_buffer->overwrite_mode)
+ && ! deleted_special
+ && ! (PT == ZV || FETCH_BYTE (PT_BYTE) == '\n'))
+ {
+ int column = current_column ();
+
+ value = Fdelete_char (make_number (-XINT (n)), killflag);
+ i = column - current_column ();
+ Finsert_char (make_number (' '), make_number (i), Qnil);
+ /* Whitespace chars are ASCII chars, so we can simply subtract. */
+ SET_PT_BOTH (PT - i, PT_BYTE - i);
+ }
+ else
+ value = Fdelete_char (make_number (-XINT (n)), killflag);
+
+ return value;
}
DEFUN ("self-insert-command", Fself_insert_command, Sself_insert_command, 1, 1, "p",
"Insert the character you type.\n\
Whichever character you type to run this command is inserted.")
- (arg)
- Lisp_Object arg;
+ (n)
+ Lisp_Object n;
{
- CHECK_NUMBER (arg, 0);
+ int character = XINT (last_command_char);
+
+ CHECK_NUMBER (n, 0);
/* Barf if the key that invoked this was not a character. */
- if (XTYPE (last_command_char) != Lisp_Int)
+ if (!INTEGERP (last_command_char))
bitch_at_user ();
+ else if (XINT (n) >= 2 && NILP (current_buffer->overwrite_mode))
+ {
+ int modified_char = character;
+ /* Add the offset to the character, for Finsert_char.
+ We pass internal_self_insert the unmodified character
+ because it itself does this offsetting. */
+ if (! NILP (current_buffer->enable_multibyte_characters))
+ modified_char = unibyte_char_to_multibyte (modified_char);
+
+ XSETFASTINT (n, XFASTINT (n) - 2);
+ /* The first one might want to expand an abbrev. */
+ internal_self_insert (character, 1);
+ /* The bulk of the copies of this char can be inserted simply.
+ We don't have to handle a user-specified face specially
+ because it will get inherited from the first char inserted. */
+ Finsert_char (make_number (modified_char), n, Qt);
+ /* The last one might want to auto-fill. */
+ internal_self_insert (character, 0);
+ }
else
- while (XINT (arg) > 0)
+ while (XINT (n) > 0)
{
- XFASTINT (arg)--; /* Ok since old and new vals both nonneg */
- internal_self_insert (XINT (last_command_char), XFASTINT (arg) != 0);
+ /* Ok since old and new vals both nonneg */
+ XSETFASTINT (n, XFASTINT (n) - 1);
+ internal_self_insert (character, XFASTINT (n) != 0);
}
return Qnil;
}
-DEFUN ("newline", Fnewline, Snewline, 0, 1, "P",
- "Insert a newline. With arg, insert that many newlines.\n\
-In Auto Fill mode, if no numeric arg, break the preceding line if it's long.")
- (arg1)
- Lisp_Object arg1;
-{
- int flag;
- Lisp_Object arg;
- char c1 = '\n';
-
- arg = Fprefix_numeric_value (arg1);
-
- if (!NILP (current_buffer->read_only))
- Fsignal (Qbuffer_read_only, Qnil);
-
- /* Inserting a newline at the end of a line
- produces better redisplay in try_window_id
- than inserting at the ebginning fo a line,
- And the textual result is the same.
- So if at beginning, pretend to be at the end.
- Must avoid internal_self_insert in that case since point is wrong.
- Luckily internal_self_insert's special features all do nothing in that case. */
-
- flag = point > BEGV && FETCH_CHAR (point - 1) == '\n';
- if (flag)
- SET_PT (point - 1);
-
- while (XINT (arg) > 0)
- {
- if (flag)
- insert (&c1, 1);
- else
- internal_self_insert ('\n', !NILP (arg1));
- XFASTINT (arg)--; /* Ok since old and new vals both nonneg */
- }
-
- if (flag)
- SET_PT (point + 1);
-
- return Qnil;
-}
-
-/* Insert character C1. If NOAUTOFILL is nonzero, don't do autofill
+/* Insert character C. If NOAUTOFILL is nonzero, don't do autofill
even if it is enabled.
If this insertion is suitable for direct output (completely simple),
- return 0. A value of 1 indicates this *might* not have been simple. */
+ return 0. A value of 1 indicates this *might* not have been simple.
+ A value of 2 means this did things that call for an undo boundary. */
-internal_self_insert (c1, noautofill)
- char c1;
+int
+internal_self_insert (c, noautofill)
+ int c;
int noautofill;
{
extern Lisp_Object Fexpand_abbrev ();
int hairy = 0;
Lisp_Object tem;
register enum syntaxcode synt;
- register int c = c1;
-
- if (!NILP (Vbefore_change_function) || !NILP (Vafter_change_function))
+ Lisp_Object overwrite, string;
+ /* Length of multi-byte form of C. */
+ int len;
+ /* Working buffer and pointer for multi-byte form of C. */
+ unsigned char workbuf[4], *str;
+ int chars_to_delete = 0;
+ int spaces_to_insert = 0;
+
+ overwrite = current_buffer->overwrite_mode;
+ if (!NILP (Vbefore_change_function) || !NILP (Vafter_change_function)
+ || !NILP (Vbefore_change_functions) || !NILP (Vafter_change_functions))
hairy = 1;
- if (!NILP (current_buffer->overwrite_mode)
- && point < ZV
- && c != '\n' && FETCH_CHAR (point) != '\n'
- && (FETCH_CHAR (point) != '\t'
- || XINT (current_buffer->tab_width) <= 0
- || !((current_column () + 1) % XFASTINT (current_buffer->tab_width))))
+ /* At first, get multi-byte form of C in STR. */
+ if (!NILP (current_buffer->enable_multibyte_characters))
+ {
+ c = unibyte_char_to_multibyte (c);
+ len = CHAR_STRING (c, workbuf, str);
+ }
+ else
+ workbuf[0] = c, str = workbuf, len = 1;
+
+ if (!NILP (overwrite)
+ && PT < ZV)
{
- del_range (point, point + 1);
- hairy = 1;
+ /* In overwrite-mode, we substitute a character at point (C2,
+ hereafter) by C. For that, we delete C2 in advance. But,
+ just substituting C2 by C may move a remaining text in the
+ line to the right or to the left, which is not preferable.
+ So we insert more spaces or delete more characters in the
+ following cases: if C is narrower than C2, after deleting C2,
+ we fill columns with spaces, if C is wider than C2, we delete
+ C2 and several characters following C2. */
+
+ /* This is the character after point. */
+ int c2 = FETCH_CHAR (PT_BYTE);
+
+ /* Column the cursor should be placed at after this insertion.
+ The correct value should be calculated only when necessary. */
+ int target_clm = 0;
+
+ /* Overwriting in binary-mode always replaces C2 by C.
+ Overwriting in textual-mode doesn't always do that.
+ It inserts newlines in the usual way,
+ and inserts any character at end of line
+ or before a tab if it doesn't use the whole width of the tab. */
+ if (EQ (overwrite, Qoverwrite_mode_binary)
+ || (c != '\n'
+ && c2 != '\n'
+ && ! (c2 == '\t'
+ && XINT (current_buffer->tab_width) > 0
+ && XFASTINT (current_buffer->tab_width) < 20
+ && (target_clm = (current_column ()
+ + XINT (Fchar_width (make_number (c2)))),
+ target_clm % XFASTINT (current_buffer->tab_width)))))
+ {
+ int pos = PT;
+ int pos_byte = PT_BYTE;
+
+ if (target_clm == 0)
+ chars_to_delete = 1;
+ else
+ {
+ /* The actual cursor position after the trial of moving
+ to column TARGET_CLM. It is greater than TARGET_CLM
+ if the TARGET_CLM is middle of multi-column
+ character. In that case, the new point is set after
+ that character. */
+ int actual_clm
+ = XFASTINT (Fmove_to_column (make_number (target_clm), Qnil));
+
+ chars_to_delete = PT - pos;
+
+ if (actual_clm > target_clm)
+ {
+ /* We will delete too many columns. Let's fill columns
+ by spaces so that the remaining text won't move. */
+ spaces_to_insert = actual_clm - target_clm;
+ }
+ }
+ SET_PT_BOTH (pos, pos_byte);
+ hairy = 2;
+ }
+ hairy = 2;
}
if (!NILP (current_buffer->abbrev_mode)
&& SYNTAX (c) != Sword
&& NILP (current_buffer->read_only)
- && point > BEGV && SYNTAX (FETCH_CHAR (point - 1)) == Sword)
+ && PT > BEGV && SYNTAX (XFASTINT (Fprevious_char ())) == Sword)
{
- Fexpand_abbrev ();
- /* We can't trust the value of Fexpand_abbrev,
- but if the buffer is now changed, this is "hairy"
- and not suitable for direct output. */
- if (MODIFF <= current_buffer->save_modified)
- hairy = 1;
+ int modiff = MODIFF;
+ Lisp_Object sym;
+
+ sym = Fexpand_abbrev ();
+
+ /* If we expanded an abbrev which has only a hook,
+ and the hook has a non-nil `no-self-insert' property,
+ return right away--don't really self-insert. */
+ if (! NILP (sym) && ! NILP (XSYMBOL (sym)->function)
+ && SYMBOLP (XSYMBOL (sym)->function))
+ {
+ Lisp_Object prop;
+ prop = Fget (XSYMBOL (sym)->function, intern ("no-self-insert"));
+ if (! NILP (prop))
+ return 1;
+ }
+
+ if (MODIFF != modiff)
+ hairy = 2;
+ }
+
+ if (chars_to_delete)
+ {
+ string = make_string_from_bytes (str, 1, len);
+ if (spaces_to_insert)
+ {
+ tem = Fmake_string (make_number (spaces_to_insert),
+ make_number (' '));
+ string = concat2 (tem, string);
+ }
+
+ replace_range (PT, PT + chars_to_delete, string, 1, 1, 0);
+ Fforward_char (make_number (1 + spaces_to_insert));
}
+ else
+ insert_and_inherit (str, len);
+
if ((c == ' ' || c == '\n')
&& !noautofill
- && !NILP (current_buffer->auto_fill_function)
- && current_column () > XFASTINT (current_buffer->fill_column))
+ && !NILP (current_buffer->auto_fill_function))
{
- if (c1 != '\n')
- insert (&c1, 1);
- call0 (current_buffer->auto_fill_function);
- if (c1 == '\n')
- insert (&c1, 1);
- hairy = 1;
+ Lisp_Object tem;
+
+ if (c == '\n')
+ /* After inserting a newline, move to previous line and fill
+ that. Must have the newline in place already so filling and
+ justification, if any, know where the end is going to be. */
+ SET_PT_BOTH (PT - 1, PT_BYTE - 1);
+ tem = call0 (current_buffer->auto_fill_function);
+ if (c == '\n')
+ SET_PT_BOTH (PT + 1, PT_BYTE + 1);
+ if (!NILP (tem))
+ hairy = 2;
}
- else
- insert (&c1, 1);
+
+#ifdef HAVE_FACES
+ /* If previous command specified a face to use, use it. */
+ if (!NILP (Vself_insert_face)
+ && EQ (current_kboard->Vlast_command, Vself_insert_face_command))
+ {
+ Fput_text_property (make_number (PT - 1), make_number (PT),
+ Qface, Vself_insert_face, Qnil);
+ Vself_insert_face = Qnil;
+ }
+#endif
+
synt = SYNTAX (c);
if ((synt == Sclose || synt == Smath)
- && !NILP (Vblink_paren_function) && INTERACTIVE)
+ && !NILP (Vblink_paren_function) && INTERACTIVE
+ && !noautofill)
{
call0 (Vblink_paren_function);
- hairy = 1;
+ hairy = 2;
}
return hairy;
}
\f
/* module initialization */
+void
syms_of_cmds ()
{
Qkill_backward_chars = intern ("kill-backward-chars");
Qkill_forward_chars = intern ("kill-forward-chars");
staticpro (&Qkill_forward_chars);
+ Qoverwrite_mode_binary = intern ("overwrite-mode-binary");
+ staticpro (&Qoverwrite_mode_binary);
+
+ DEFVAR_LISP ("self-insert-face", &Vself_insert_face,
+ "If non-nil, set the face of the next self-inserting character to this.\n\
+See also `self-insert-face-command'.");
+ Vself_insert_face = Qnil;
+
+ DEFVAR_LISP ("self-insert-face-command", &Vself_insert_face_command,
+ "This is the command that set up `self-insert-face'.\n\
+If `last-command' does not equal this value, we ignore `self-insert-face'.");
+ Vself_insert_face_command = Qnil;
+
DEFVAR_LISP ("blink-paren-function", &Vblink_paren_function,
"Function called, if non-nil, whenever a close parenthesis is inserted.\n\
More precisely, a char with closeparen syntax is self-inserted.");
Vblink_paren_function = Qnil;
+ defsubr (&Sforward_point);
defsubr (&Sforward_char);
defsubr (&Sbackward_char);
defsubr (&Sforward_line);
defsubr (&Sdelete_backward_char);
defsubr (&Sself_insert_command);
- defsubr (&Snewline);
}
+void
keys_of_cmds ()
{
int n;
- initial_define_key (global_map, Ctl('M'), "newline");
- initial_define_key (global_map, Ctl('I'), "self-insert-command");
+ 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");
HCoop / bpt / emacs.git / blobdiff