--- /dev/null
+/* Simple built-in editing commands.
+ Copyright (C) 1985, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
+
+This file is part of XEmacs.
+
+XEmacs is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the
+Free Software Foundation; either version 2, or (at your option) any
+later version.
+
+XEmacs is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with XEmacs; see the file COPYING. If not, write to
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+/* Synched up with: Mule 2.0, FSF 19.30. */
+
+#include <config.h>
+#include "lisp.h"
+#include "commands.h"
+#include "buffer.h"
+#include "syntax.h"
+#include "insdel.h"
+
+Lisp_Object Qkill_forward_chars;
+Lisp_Object Qself_insert_command;
+Lisp_Object Qno_self_insert;
+
+Lisp_Object 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;
+
+/* A char-table for characters which may invoke auto-filling. */
+Lisp_Object Vauto_fill_chars;
+\f
+DEFUN ("forward-char", Fforward_char, 0, 2, "_p", /*
+Move point right COUNT characters (left if COUNT is negative).
+On attempt to pass end of buffer, stop and signal `end-of-buffer'.
+On attempt to pass beginning of buffer, stop and signal `beginning-of-buffer'.
+On reaching end of buffer, stop and signal error.
+
+The characters that are moved over may be added to the current selection
+\(i.e. active region) if the Shift key is held down, a motion key is used
+to invoke this command, and `shifted-motion-keys-select-region' is t; see
+the documentation for this variable for more details.
+*/
+ (count, buffer))
+{
+ struct buffer *buf = decode_buffer (buffer, 1);
+ EMACS_INT n;
+
+ if (NILP (count))
+ n = 1;
+ else
+ {
+ CHECK_INT (count);
+ n = XINT (count);
+ }
+
+ /* This used to just set point to point + XINT (count), 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. */
+ {
+ Bufpos new_point = BUF_PT (buf) + n;
+
+ if (new_point < BUF_BEGV (buf))
+ {
+ BUF_SET_PT (buf, BUF_BEGV (buf));
+ Fsignal (Qbeginning_of_buffer, Qnil);
+ return Qnil;
+ }
+ if (new_point > BUF_ZV (buf))
+ {
+ BUF_SET_PT (buf, BUF_ZV (buf));
+ Fsignal (Qend_of_buffer, Qnil);
+ return Qnil;
+ }
+
+ BUF_SET_PT (buf, new_point);
+ }
+
+ return Qnil;
+}
+
+DEFUN ("backward-char", Fbackward_char, 0, 2, "_p", /*
+Move point left COUNT characters (right if COUNT is negative).
+On attempt to pass end of buffer, stop and signal `end-of-buffer'.
+On attempt to pass beginning of buffer, stop and signal `beginning-of-buffer'.
+
+The characters that are moved over may be added to the current selection
+\(i.e. active region) if the Shift key is held down, a motion key is used
+to invoke this command, and `shifted-motion-keys-select-region' is t; see
+the documentation for this variable for more details.
+*/
+ (count, buffer))
+{
+ if (NILP (count))
+ count = make_int (-1);
+ else
+ {
+ CHECK_INT (count);
+ count = make_int (- XINT (count));
+ }
+ return Fforward_char (count, buffer);
+}
+
+DEFUN ("forward-line", Fforward_line, 0, 2, "_p", /*
+Move COUNT lines forward (backward if COUNT is negative).
+Precisely, if point is on line I, move to the start of line I + COUNT.
+If there isn't room, go as far as possible (no error).
+Returns the count of lines left to move. If moving forward,
+that is COUNT - number of lines moved; if backward, COUNT + number moved.
+With positive COUNT, a non-empty line at the end counts as one line
+ successfully moved (for the return value).
+If BUFFER is nil, the current buffer is assumed.
+
+The characters that are moved over may be added to the current selection
+\(i.e. active region) if the Shift key is held down, a motion key is used
+to invoke this command, and `shifted-motion-keys-select-region' is t; see
+the documentation for this variable for more details.
+*/
+ (count, buffer))
+{
+ struct buffer *buf = decode_buffer (buffer, 1);
+ Bufpos pos2 = BUF_PT (buf);
+ Bufpos pos;
+ EMACS_INT n, shortage, negp;
+
+ if (NILP (count))
+ n = 1;
+ else
+ {
+ CHECK_INT (count);
+ n = XINT (count);
+ }
+
+ negp = n <= 0;
+ pos = scan_buffer (buf, '\n', pos2, 0, n - negp, &shortage, 1);
+ if (shortage > 0
+ && (negp
+ || (BUF_ZV (buf) > BUF_BEGV (buf)
+ && pos != pos2
+ && BUF_FETCH_CHAR (buf, pos - 1) != '\n')))
+ shortage--;
+ BUF_SET_PT (buf, pos);
+ return make_int (negp ? - shortage : shortage);
+}
+
+DEFUN ("point-at-bol", Fpoint_at_bol, 0, 2, 0, /*
+Return the character position of the first character on the current line.
+With argument COUNT not nil or 1, move forward COUNT - 1 lines first.
+If scan reaches end of buffer, return that position.
+This function does not move point.
+*/
+ (count, buffer))
+{
+ struct buffer *b = decode_buffer (buffer, 1);
+ REGISTER int orig, end;
+
+ XSETBUFFER (buffer, b);
+ if (NILP (count))
+ count = make_int (0);
+ else
+ {
+ CHECK_INT (count);
+ count = make_int (XINT (count) - 1);
+ }
+
+ orig = BUF_PT (b);
+ Fforward_line (count, buffer);
+ end = BUF_PT (b);
+ BUF_SET_PT (b, orig);
+
+ return make_int (end);
+}
+
+DEFUN ("beginning-of-line", Fbeginning_of_line, 0, 2, "_p", /*
+Move point to beginning of current line.
+With argument COUNT not nil or 1, move forward COUNT - 1 lines first.
+If scan reaches end of buffer, stop there without error.
+If BUFFER is nil, the current buffer is assumed.
+
+The characters that are moved over may be added to the current selection
+\(i.e. active region) if the Shift key is held down, a motion key is used
+to invoke this command, and `shifted-motion-keys-select-region' is t; see
+the documentation for this variable for more details.
+*/
+ (count, buffer))
+{
+ struct buffer *b = decode_buffer (buffer, 1);
+
+ BUF_SET_PT (b, XINT (Fpoint_at_bol (count, buffer)));
+ return Qnil;
+}
+
+DEFUN ("point-at-eol", Fpoint_at_eol, 0, 2, 0, /*
+Return the character position of the last character on the current line.
+With argument COUNT not nil or 1, move forward COUNT - 1 lines first.
+If scan reaches end of buffer, return that position.
+This function does not move point.
+*/
+ (count, buffer))
+{
+ struct buffer *buf = decode_buffer (buffer, 1);
+ EMACS_INT n;
+
+ if (NILP (count))
+ n = 1;
+ else
+ {
+ CHECK_INT (count);
+ n = XINT (count);
+ }
+
+ return make_int (find_before_next_newline (buf, BUF_PT (buf), 0,
+ n - (n <= 0)));
+}
+
+DEFUN ("end-of-line", Fend_of_line, 0, 2, "_p", /*
+Move point to end of current line.
+With argument COUNT not nil or 1, move forward COUNT - 1 lines first.
+If scan reaches end of buffer, stop there without error.
+If BUFFER is nil, the current buffer is assumed.
+
+The characters that are moved over may be added to the current selection
+\(i.e. active region) if the Shift key is held down, a motion key is used
+to invoke this command, and `shifted-motion-keys-select-region' is t; see
+the documentation for this variable for more details.
+*/
+ (count, buffer))
+{
+ struct buffer *b = decode_buffer (buffer, 1);
+
+ BUF_SET_PT (b, XINT (Fpoint_at_eol (count, buffer)));
+ return Qnil;
+}
+
+DEFUN ("delete-char", Fdelete_char, 0, 2, "*p\nP", /*
+Delete the following COUNT characters (previous, with negative COUNT).
+Optional second arg KILLP non-nil means kill instead (save in kill ring).
+Interactively, COUNT is the prefix arg, and KILLP is set if
+COUNT was explicitly specified.
+*/
+ (count, killp))
+{
+ /* This function can GC */
+ Bufpos pos;
+ struct buffer *buf = current_buffer;
+ EMACS_INT n;
+
+ if (NILP (count))
+ n = 1;
+ else
+ {
+ CHECK_INT (count);
+ n = XINT (count);
+ }
+
+ pos = BUF_PT (buf) + n;
+ if (NILP (killp))
+ {
+ if (n < 0)
+ {
+ if (pos < BUF_BEGV (buf))
+ signal_error (Qbeginning_of_buffer, Qnil);
+ else
+ buffer_delete_range (buf, pos, BUF_PT (buf), 0);
+ }
+ else
+ {
+ if (pos > BUF_ZV (buf))
+ signal_error (Qend_of_buffer, Qnil);
+ else
+ buffer_delete_range (buf, BUF_PT (buf), pos, 0);
+ }
+ }
+ else
+ {
+ call1 (Qkill_forward_chars, count);
+ }
+ return Qnil;
+}
+
+DEFUN ("delete-backward-char", Fdelete_backward_char, 0, 2, "*p\nP", /*
+Delete the previous COUNT characters (following, with negative COUNT).
+Optional second arg KILLP non-nil means kill instead (save in kill ring).
+Interactively, COUNT is the prefix arg, and KILLP is set if
+COUNT was explicitly specified.
+*/
+ (count, killp))
+{
+ /* This function can GC */
+ EMACS_INT n;
+
+ if (NILP (count))
+ n = 1;
+ else
+ {
+ CHECK_INT (count);
+ n = XINT (count);
+ }
+
+ return Fdelete_char (make_int (- n), killp);
+}
+
+static void internal_self_insert (Emchar ch, int noautofill);
+
+DEFUN ("self-insert-command", Fself_insert_command, 1, 1, "*p", /*
+Insert the character you type.
+Whichever character you type to run this command is inserted.
+If a prefix arg COUNT is specified, the character is inserted COUNT times.
+*/
+ (count))
+{
+ /* This function can GC */
+ Emchar ch;
+ Lisp_Object c;
+ EMACS_INT n;
+
+ CHECK_NATNUM (count);
+ n = XINT (count);
+
+ if (CHAR_OR_CHAR_INTP (Vlast_command_char))
+ c = Vlast_command_char;
+ else
+ c = Fevent_to_character (Vlast_command_event, Qnil, Qnil, Qt);
+
+ if (NILP (c))
+ signal_simple_error ("Last typed character has no ASCII equivalent",
+ Fcopy_event (Vlast_command_event, Qnil));
+
+ CHECK_CHAR_COERCE_INT (c);
+
+ ch = XCHAR (c);
+
+ while (n--)
+ internal_self_insert (ch, (n != 0));
+
+ return Qnil;
+}
+
+/* Insert character C1. If NOAUTOFILL is nonzero, don't do autofill
+ even if it is enabled.
+
+ FSF:
+
+ If this insertion is suitable for direct output (completely 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. */
+
+static void
+internal_self_insert (Emchar c1, int noautofill)
+{
+ /* This function can GC */
+ /* int hairy = 0; -- unused */
+ REGISTER enum syntaxcode synt;
+ REGISTER Emchar c2;
+ Lisp_Object overwrite;
+ Lisp_Char_Table *syntax_table;
+ struct buffer *buf = current_buffer;
+ int tab_width;
+
+ overwrite = buf->overwrite_mode;
+ syntax_table = XCHAR_TABLE (buf->mirror_syntax_table);
+
+#if 0
+ /* No, this is very bad, it makes undo *always* undo a character at a time
+ instead of grouping consecutive self-inserts together. Nasty nasty.
+ */
+ if (!NILP (Vbefore_change_functions) || !NILP (Vafter_change_functions)
+ || !NILP (Vbefore_change_function) || !NILP (Vafter_change_function))
+ hairy = 1;
+#endif
+
+ if (!NILP (overwrite)
+ && BUF_PT (buf) < BUF_ZV (buf)
+ && (EQ (overwrite, Qoverwrite_mode_binary)
+ || (c1 != '\n' && BUF_FETCH_CHAR (buf, BUF_PT (buf)) != '\n'))
+ && (EQ (overwrite, Qoverwrite_mode_binary)
+ || BUF_FETCH_CHAR (buf, BUF_PT (buf)) != '\t'
+ || ((tab_width = XINT (buf->tab_width), tab_width <= 0)
+ || tab_width > 20
+ || !((current_column (buf) + 1) % tab_width))))
+ {
+ buffer_delete_range (buf, BUF_PT (buf), BUF_PT (buf) + 1, 0);
+ /* hairy = 2; */
+ }
+
+ if (!NILP (buf->abbrev_mode)
+ && !WORD_SYNTAX_P (syntax_table, c1)
+ && NILP (buf->read_only)
+ && BUF_PT (buf) > BUF_BEGV (buf))
+ {
+ c2 = BUF_FETCH_CHAR (buf, BUF_PT (buf) - 1);
+
+ if (WORD_SYNTAX_P (syntax_table, c2))
+ {
+#if 1
+ Fexpand_abbrev ();
+#else /* FSFmacs */
+ Lisp_Object sym = Fexpand_abbrev ();
+
+ /* I think this is too bogus to add. The function should
+ have a way of examining the character to be inserted, so
+ it can decide whether to insert it or not. We should
+ design it better than that. */
+
+ /* Here FSFmacs remembers MODIFF, compares it after
+ Fexpand_abbrev() finishes, and updates HAIRY. */
+
+ /* NOTE: we cannot simply check for Vlast_abbrev, because
+ Fexpand_abbrev() can bail out before setting it to
+ anything meaningful, leaving us stuck with an old value.
+ Thus Fexpand_abbrev() was extended to return the actual
+ abbrev symbol. */
+ if (!NILP (sym)
+ && !NILP (symbol_function (XSYMBOL (sym)))
+ && SYMBOLP (symbol_function (XSYMBOL (sym))))
+ {
+ Lisp_Object prop = Fget (symbol_function (XSYMBOL (sym)),
+ Qno_self_insert, Qnil);
+ if (!NILP (prop))
+ return;
+ }
+#endif /* FSFmacs */
+ }
+ }
+ if ((CHAR_TABLEP (Vauto_fill_chars)
+ ? !NILP (XCHAR_TABLE_VALUE_UNSAFE (Vauto_fill_chars, c1))
+ : (c1 == ' ' || c1 == '\n'))
+ && !noautofill
+ && !NILP (buf->auto_fill_function))
+ {
+ buffer_insert_emacs_char (buf, c1);
+ if (c1 == '\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. */
+ BUF_SET_PT (buf, BUF_PT (buf) - 1);
+ call0 (buf->auto_fill_function);
+ if (c1 == '\n')
+ BUF_SET_PT (buf, BUF_PT (buf) + 1);
+ /* hairy = 2; */
+ }
+ else
+ buffer_insert_emacs_char (buf, c1);
+
+ /* If previous command specified a face to use, use it. */
+ if (!NILP (Vself_insert_face)
+ && EQ (Vlast_command, Vself_insert_face_command))
+ {
+ Lisp_Object before = make_int (BUF_PT (buf) - 1);
+ Lisp_Object after = make_int (BUF_PT (buf));
+ Fput_text_property (before, after, Qface, Vself_insert_face, Qnil);
+ Fput_text_property (before, after, Qstart_open, Qt, Qnil);
+ Fput_text_property (before, after, Qend_open, Qnil, Qnil);
+ /* #### FSFmacs properties are normally closed ("sticky") on the
+ end but not the beginning. It's the opposite for us. */
+ Vself_insert_face = Qnil;
+ }
+ synt = SYNTAX (syntax_table, c1);
+ if ((synt == Sclose || synt == Smath)
+ && !NILP (Vblink_paren_function) && INTERACTIVE
+ && !noautofill)
+ {
+ call0 (Vblink_paren_function);
+ /* hairy = 2; */
+ }
+
+ /* return hairy; */
+}
+
+/* (this comes from Mule but is a generally good idea) */
+
+DEFUN ("self-insert-internal", Fself_insert_internal, 1, 1, 0, /*
+Invoke `self-insert-command' as if CHARACTER is entered from keyboard.
+*/
+ (character))
+{
+ /* This function can GC */
+ CHECK_CHAR_COERCE_INT (character);
+ internal_self_insert (XCHAR (character), 0);
+ return Qnil;
+}
+\f
+/* module initialization */
+
+void
+syms_of_cmds (void)
+{
+ defsymbol (&Qkill_forward_chars, "kill-forward-chars");
+ defsymbol (&Qself_insert_command, "self-insert-command");
+ defsymbol (&Qoverwrite_mode_binary, "overwrite-mode-binary");
+ defsymbol (&Qno_self_insert, "no-self-insert");
+
+ DEFSUBR (Fforward_char);
+ DEFSUBR (Fbackward_char);
+ DEFSUBR (Fforward_line);
+ DEFSUBR (Fbeginning_of_line);
+ DEFSUBR (Fend_of_line);
+
+ DEFSUBR (Fpoint_at_bol);
+ DEFSUBR (Fpoint_at_eol);
+
+ DEFSUBR (Fdelete_char);
+ DEFSUBR (Fdelete_backward_char);
+
+ DEFSUBR (Fself_insert_command);
+ DEFSUBR (Fself_insert_internal);
+}
+
+void
+vars_of_cmds (void)
+{
+ DEFVAR_LISP ("self-insert-face", &Vself_insert_face /*
+If non-nil, set the face of the next self-inserting character to this.
+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'.
+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.
+More precisely, a char with closeparen syntax is self-inserted.
+*/ );
+ Vblink_paren_function = Qnil;
+
+ DEFVAR_LISP ("auto-fill-chars", &Vauto_fill_chars /*
+A char-table for characters which invoke auto-filling.
+Such characters have value t in this table.
+*/);
+ Vauto_fill_chars = Fmake_char_table (Qgeneric);
+ XCHAR_TABLE (Vauto_fill_chars)->ascii[' '] = Qt;
+ XCHAR_TABLE (Vauto_fill_chars)->ascii['\n'] = Qt;
+}
projects / chise / xemacs-chise.git- / blobdiff