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git://git.sv.gnu.org/emacs.git
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Initial revision
This commit is contained in:
Jim Blandy
parent
695d13c764
commit
cd645247b0
2 changed files with 427 additions and 0 deletions
357
src/cmds.c
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357
src/cmds.c
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/* Simple built-in editing commands.
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Copyright (C) 1985 Free Software Foundation, Inc.
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This file is part of GNU Emacs.
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GNU Emacs is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 1, or (at your option)
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any later version.
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GNU Emacs is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Emacs; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include "config.h"
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#include "lisp.h"
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#include "commands.h"
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#include "buffer.h"
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#include "syntax.h"
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Lisp_Object Qkill_forward_chars, Qkill_backward_chars, Vblink_paren_function;
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DEFUN ("forward-char", Fforward_char, Sforward_char, 0, 1, "p",
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"Move point right ARG characters (left if ARG negative).\n\
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On reaching end of buffer, stop and signal error.")
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(n)
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Lisp_Object n;
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{
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if (NULL (n))
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XFASTINT (n) = 1;
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else
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CHECK_NUMBER (n, 0);
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SET_PT (point + XINT (n));
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if (point < BEGV)
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{
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SET_PT (BEGV);
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Fsignal (Qbeginning_of_buffer, Qnil);
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}
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if (point > ZV)
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{
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SET_PT (ZV);
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Fsignal (Qend_of_buffer, Qnil);
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}
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return Qnil;
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}
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DEFUN ("backward-char", Fbackward_char, Sbackward_char, 0, 1, "p",
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"Move point left ARG characters (right if ARG negative).\n\
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On attempt to pass beginning or end of buffer, stop and signal error.")
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(n)
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Lisp_Object n;
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{
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if (NULL (n))
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XFASTINT (n) = 1;
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else
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CHECK_NUMBER (n, 0);
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XSETINT (n, - XINT (n));
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return Fforward_char (n);
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}
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DEFUN ("forward-line", Fforward_line, Sforward_line, 0, 1, "p",
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"Move ARG lines forward (backward if ARG is negative).\n\
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Precisely, if point is on line I, move to the start of line I + ARG.\n\
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If there isn't room, go as far as possible (no error).\n\
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Returns the count of lines left to move. If moving forward,\n\
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that is ARG - number of lines moved; if backward, ARG + number moved.\n\
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With positive ARG, a non-empty line at the end counts as one line\n\
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successfully moved (for the return value).")
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(n)
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Lisp_Object n;
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{
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int pos2 = point;
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int pos;
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int count, shortage, negp;
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if (NULL (n))
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count = 1;
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else
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{
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CHECK_NUMBER (n, 0);
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count = XINT (n);
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}
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negp = count <= 0;
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pos = scan_buffer ('\n', pos2, count - negp, &shortage);
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if (shortage > 0
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&& (negp
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|| (ZV >= BEGV
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&& FETCH_CHAR (pos - 1) != '\n')))
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shortage--;
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SET_PT (pos);
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return make_number (negp ? - shortage : shortage);
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}
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DEFUN ("beginning-of-line", Fbeginning_of_line, Sbeginning_of_line,
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0, 1, "p",
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"Move point to beginning of current line.\n\
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With argument ARG not nil or 1, move forward ARG - 1 lines first.\n\
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If scan reaches end of buffer, stop there without error.")
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(n)
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Lisp_Object n;
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{
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if (NULL (n))
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XFASTINT (n) = 1;
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else
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CHECK_NUMBER (n, 0);
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Fforward_line (make_number (XINT (n) - 1));
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return Qnil;
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}
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DEFUN ("end-of-line", Fend_of_line, Send_of_line,
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0, 1, "p",
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"Move point to end of current line.\n\
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With argument ARG not nil or 1, move forward ARG - 1 lines first.\n\
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If scan reaches end of buffer, stop there without error.")
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(n)
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Lisp_Object n;
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{
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register int pos;
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register int stop;
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if (NULL (n))
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XFASTINT (n) = 1;
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else
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CHECK_NUMBER (n, 0);
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if (XINT (n) != 1)
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Fforward_line (make_number (XINT (n) - 1));
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pos = point;
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stop = ZV;
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while (pos < stop && FETCH_CHAR (pos) != '\n') pos++;
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SET_PT (pos);
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return Qnil;
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}
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DEFUN ("delete-char", Fdelete_char, Sdelete_char, 1, 2, "p\nP",
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"Delete the following ARG characters (previous, with negative arg).\n\
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Optional second arg KILLFLAG non-nil means kill instead (save in kill ring).\n\
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Interactively, ARG is the prefix arg, and KILLFLAG is set if\n\
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ARG was explicitly specified.")
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(n, killflag)
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Lisp_Object n, killflag;
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{
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CHECK_NUMBER (n, 0);
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if (NULL (killflag))
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{
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if (XINT (n) < 0)
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{
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if (point + XINT (n) < BEGV)
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Fsignal (Qbeginning_of_buffer, Qnil);
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else
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del_range (point + XINT (n), point);
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}
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else
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{
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if (point + XINT (n) > ZV)
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Fsignal (Qend_of_buffer, Qnil);
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else
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del_range (point, point + XINT (n));
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}
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}
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else
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{
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call1 (Qkill_forward_chars, n);
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}
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return Qnil;
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}
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DEFUN ("delete-backward-char", Fdelete_backward_char, Sdelete_backward_char,
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1, 2, "p\nP",
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"Delete the previous ARG characters (following, with negative ARG).\n\
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Optional second arg KILLFLAG non-nil means kill instead (save in kill ring).\n\
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Interactively, ARG is the prefix arg, and KILLFLAG is set if\n\
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ARG was explicitly specified.")
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(n, killflag)
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Lisp_Object n, killflag;
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{
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CHECK_NUMBER (n, 0);
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return Fdelete_char (make_number (-XINT (n)), killflag);
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}
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DEFUN ("self-insert-command", Fself_insert_command, Sself_insert_command, 1, 1, "p",
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"Insert the character you type.\n\
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Whichever character you type to run this command is inserted.")
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(arg)
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Lisp_Object arg;
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{
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CHECK_NUMBER (arg, 0);
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/* Barf if the key that invoked this was not a character. */
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if (XTYPE (last_command_char) != Lisp_Int)
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bitch_at_user ();
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else
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while (XINT (arg) > 0)
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{
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XFASTINT (arg)--; /* Ok since old and new vals both nonneg */
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internal_self_insert (XINT (last_command_char), XFASTINT (arg) != 0);
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}
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return Qnil;
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}
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DEFUN ("newline", Fnewline, Snewline, 0, 1, "P",
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"Insert a newline. With arg, insert that many newlines.\n\
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In Auto Fill mode, if no numeric arg, break the preceding line if it's long.")
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(arg1)
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Lisp_Object arg1;
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{
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int flag;
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Lisp_Object arg;
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char c1 = '\n';
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arg = Fprefix_numeric_value (arg1);
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if (!NULL (current_buffer->read_only))
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Fsignal (Qbuffer_read_only, Qnil);
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/* Inserting a newline at the end of a line
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produces better redisplay in try_window_id
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than inserting at the ebginning fo a line,
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And the textual result is the same.
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So if at beginning, pretend to be at the end.
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Must avoid internal_self_insert in that case since point is wrong.
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Luckily internal_self_insert's special features all do nothing in that case. */
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flag = point > BEGV && FETCH_CHAR (point - 1) == '\n';
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if (flag)
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SET_PT (point - 1);
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while (XINT (arg) > 0)
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{
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if (flag)
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insert (&c1, 1);
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else
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internal_self_insert ('\n', !NULL (arg1));
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XFASTINT (arg)--; /* Ok since old and new vals both nonneg */
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}
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if (flag)
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SET_PT (point + 1);
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return Qnil;
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}
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internal_self_insert (c1, noautofill)
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char c1;
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int noautofill;
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{
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extern Lisp_Object Fexpand_abbrev ();
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int hairy = 0;
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Lisp_Object tem;
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register enum syntaxcode synt;
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register int c = c1;
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if (!NULL (Vbefore_change_function) || !NULL (Vafter_change_function))
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hairy = 1;
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if (!NULL (current_buffer->overwrite_mode)
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&& point < ZV
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&& c != '\n' && FETCH_CHAR (point) != '\n'
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&& (FETCH_CHAR (point) != '\t'
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|| XINT (current_buffer->tab_width) <= 0
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|| !((current_column () + 1) % XFASTINT (current_buffer->tab_width))))
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{
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del_range (point, point + 1);
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hairy = 1;
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}
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if (!NULL (current_buffer->abbrev_mode)
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&& SYNTAX (c) != Sword
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&& NULL (current_buffer->read_only)
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&& point > BEGV && SYNTAX (FETCH_CHAR (point - 1)) == Sword)
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{
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tem = Fexpand_abbrev ();
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if (!NULL (tem))
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hairy = 1;
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}
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if ((c == ' ' || c == '\n')
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&& !noautofill
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&& !NULL (current_buffer->auto_fill_function)
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&& current_column () > XFASTINT (current_buffer->fill_column))
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{
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if (c1 != '\n')
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insert (&c1, 1);
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call0 (current_buffer->auto_fill_function);
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if (c1 == '\n')
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insert (&c1, 1);
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hairy = 1;
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}
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else
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insert (&c1, 1);
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synt = SYNTAX (c);
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if ((synt == Sclose || synt == Smath)
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&& !NULL (Vblink_paren_function) && INTERACTIVE)
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{
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call0 (Vblink_paren_function);
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hairy = 1;
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}
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return hairy;
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}
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/* module initialization */
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syms_of_cmds ()
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{
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Qkill_backward_chars = intern ("kill-backward-chars");
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staticpro (&Qkill_backward_chars);
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Qkill_forward_chars = intern ("kill-forward-chars");
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staticpro (&Qkill_forward_chars);
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DEFVAR_LISP ("blink-paren-function", &Vblink_paren_function,
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"Function called, if non-nil, whenever a close parenthesis is inserted.\n\
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More precisely, a char with closeparen syntax is self-inserted.");
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Vblink_paren_function = Qnil;
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defsubr (&Sforward_char);
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defsubr (&Sbackward_char);
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defsubr (&Sforward_line);
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defsubr (&Sbeginning_of_line);
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defsubr (&Send_of_line);
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defsubr (&Sdelete_char);
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defsubr (&Sdelete_backward_char);
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defsubr (&Sself_insert_command);
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defsubr (&Snewline);
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}
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keys_of_cmds ()
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{
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int n;
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initial_define_key (global_map, Ctl('M'), "newline");
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initial_define_key (global_map, Ctl('I'), "self-insert-command");
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for (n = 040; n < 0177; n++)
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initial_define_key (global_map, n, "self-insert-command");
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initial_define_key (global_map, Ctl ('A'), "beginning-of-line");
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initial_define_key (global_map, Ctl ('B'), "backward-char");
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initial_define_key (global_map, Ctl ('D'), "delete-char");
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initial_define_key (global_map, Ctl ('E'), "end-of-line");
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initial_define_key (global_map, Ctl ('F'), "forward-char");
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initial_define_key (global_map, 0177, "delete-backward-char");
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}
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70
src/commands.h
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70
src/commands.h
Normal file
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@ -0,0 +1,70 @@
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/* Definitions needed by most editing commands.
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Copyright (C) 1985 Free Software Foundation, Inc.
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This file is part of GNU Emacs.
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GNU Emacs is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 1, or (at your option)
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any later version.
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GNU Emacs is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
|
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along with GNU Emacs; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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#define Ctl(c) ((c)&037)
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/* Define the names of keymaps, just so people can refer to
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them in calls to initial_define_key */
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extern Lisp_Object global_map;
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extern Lisp_Object meta_map;
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extern Lisp_Object control_x_map;
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/* Keymap for mouse commands. */
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extern Lisp_Object Vglobal_mouse_map;
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extern Lisp_Object Vminibuffer_local_map;
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extern Lisp_Object Vminibuffer_local_ns_map;
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/* keymap used for minibuffers when doing completion */
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extern Lisp_Object Vminibuffer_local_completion_map;
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/* keymap used for minibuffers when doing completion and require a match */
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extern Lisp_Object Vminibuffer_local_must_match_map;
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/* Last character of last key sequence. */
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extern Lisp_Object last_command_char;
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/* Command character to be re-read, or -1 */
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extern int unread_command_char;
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/* Previous command symbol found here for comparison */
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extern Lisp_Object last_command;
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/* Nonzero means ^G can quit instantly */
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extern int immediate_quit;
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extern Lisp_Object Vexecuting_macro;
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/* Nonzero if input is coming from the keyboard */
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#define INTERACTIVE (NULL (Vexecuting_macro) && !noninteractive)
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/* Set this nonzero to force reconsideration of mode line. */
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extern int update_mode_lines;
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/* Nonzero means reading single-character input with prompt
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so put cursor on minibuffer after the prompt. */
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extern int cursor_in_echo_area;
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