X-Git-Url: https://code.delx.au/gnu-emacs/blobdiff_plain/e686c647fd1cc7a66bae3621d8faccef4b48497f..c1bb59cab27d650e7dabd01d1feb3cdce602bd32:/src/cmds.c diff --git a/src/cmds.c b/src/cmds.c index b927047e1c..8b51e69de4 100644 --- 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, 93, 94, 95, 1996 Free Software Foundation, Inc. This file is part of GNU Emacs. @@ -15,52 +15,118 @@ GNU General Public License for more details. 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 #include "lisp.h" #include "commands.h" #include "buffer.h" +#include "charset.h" #include "syntax.h" +#include "window.h" +#include "keyboard.h" 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; + +/* 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; + +/* Offset to add to a non-ASCII value when inserting it. */ +int nonascii_insert_offset; + +extern Lisp_Object Qface; +/* Return buffer position which is N characters after `point'. */ +int +forward_point (n) + int n; +{ + int pos = PT, c; + + if (!NILP (current_buffer->enable_multibyte_characters)) + { + /* Simply adding N to `point' doesn't work because of multi-byte + form. We had better not use INC_POS and DEC_POS because they + check the gap position every time. But, for the moment, we + need working code. */ + if (n > 0) + { + while (pos < ZV && n--) INC_POS (pos); + if (pos < ZV) n++; + } + else + { + while (pos > BEGV && n++) DEC_POS (pos); + if (pos > BEGV) n--; + } + } + pos += n; + + return pos; +} + +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 (forward_point (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 = forward_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; } 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); @@ -69,17 +135,17 @@ On attempt to pass beginning or end of buffer, stop and signal error.") } 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 pos2 = PT; int pos; int count, shortage, negp; @@ -92,12 +158,12 @@ 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, 0, count - negp, &shortage, 1); if (shortage > 0 && (negp || (ZV > BEGV && pos != pos2 - && FETCH_CHAR (pos - 1) != '\n'))) + && FETCH_BYTE (pos - 1) != '\n'))) shortage--; SET_PT (pos); return make_number (negp ? - shortage : shortage); @@ -106,24 +172,24 @@ With positive ARG, a non-empty line at the end counts as one line\n\ 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; @@ -132,46 +198,43 @@ If scan reaches end of buffer, stop there without error.") 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 = forward_point (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 @@ -183,143 +246,259 @@ ARG was explicitly specified.") 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, 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; + for (i = 0; i < XINT (n) && pos > BEGV; i++) + { + int c; + + DEC_POS (pos); + c = FETCH_BYTE (pos); + 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) == '\n')) + { + int column = current_column (); + + value = Fdelete_char (make_number (-XINT (n)), killflag); + i = column - current_column (); + Finsert_char (make_number (' '), i); + SET_PT (PT - 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 (modified_char >= 0200 && modified_char <= 0377 + && ! NILP (current_buffer->enable_multibyte_characters)) + modified_char += nonascii_insert_offset; + + 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; +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; + /* Length of multi-byte form of C. */ + int len; + /* Working buffer and pointer for multi-byte form of C. */ + unsigned char workbuf[4], *str; + + if (c >= 0200 && c <= 0377 + && ! NILP (current_buffer->enable_multibyte_characters)) + c += nonascii_insert_offset; + + 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 - && (overwrite_binary_mode || (c != '\n' && FETCH_CHAR (point) != '\n')) - && (overwrite_binary_mode - || 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)) + 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. */ + + /* A code at `point'. Since this is checked only against + NEWLINE and TAB, we don't need a character code but only the + first byte of multi-byte form. */ + unsigned char c2 = FETCH_BYTE (PT); + /* A 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 substitute C2 by C. But, + overwriting in textual-mode does this substitution in the + case that C is not NEWLINE and C2 is not NEWLINE nor TAB. If + C2 is TAB, the substitution is done only when C2 is currently + expanded to 0 column, or more than 20 columns, or more than + the width of C. */ + if (EQ (overwrite, Qoverwrite_mode_binary) + || (c != '\n' + && c2 != '\n' + && (target_clm = current_column() + WIDTH_BY_CHAR_HEAD (str[0]), + (c2 != '\t' + || XINT (current_buffer->tab_width) <= 0 + || XFASTINT (current_buffer->tab_width) > 20 + || !(target_clm % XFASTINT (current_buffer->tab_width)))))) + { + if (target_clm == 0) + del_range (PT, forward_point (1)); + else + { + int pos = point; + /* 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 (target_clm)); + + del_range (pos, PT); + if (actual_clm > target_clm) + { + /* We deleted too many columns. Let's fill columns + by spaces so that the remaining text won't move. */ + insert(" ", actual_clm - target_clm); + SET_PT (pos); + } + } + 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) { int modiff = MODIFF; - Fexpand_abbrev (); - /* We can't trust the value of Fexpand_abbrev, - but if Fexpand_abbrev changed the buffer, - assume it expanded something. */ + 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 = 1; + hairy = 2; } 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; + + insert_and_inherit (str, len); + 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 (PT - 1); + tem = call0 (current_buffer->auto_fill_function); + if (c == '\n') + SET_PT (PT + 1); + if (!NILP (tem)) + hairy = 2; } else - insert (&c1, 1); + insert_and_inherit (str, len); + +#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)) + { + Lisp_Object before, after; + XSETINT (before, PT - len); + XSETINT (after, PT); + Fput_text_property (before, after, 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; } @@ -334,17 +513,32 @@ 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_tabs_mode = 1; + 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; + DEFVAR_INT ("nonascii-insert-offset", &nonascii_insert_offset, + "Offset to add to a non-ascii code 0200...0377 when inserting it.\n\ +This applies only when multibyte characters are enabled, and it serves\n\ +to convert a Latin-1 or similar 8-bit character code to the corresponding\n\ +Emacs character code."); + nonascii_insert_offset = 0; + + defsubr (&Sforward_point); defsubr (&Sforward_char); defsubr (&Sbackward_char); defsubr (&Sforward_line); @@ -355,17 +549,21 @@ More precisely, a char with closeparen syntax is self-inserted."); defsubr (&Sdelete_backward_char); defsubr (&Sself_insert_command); - defsubr (&Snewline); } 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");