/* Buffer manipulation primitives for GNU Emacs.
- Copyright (C) 1985, 86, 87, 88, 89, 93, 94, 95, 97, 98, 99,
- 2000, 01, 02, 03, 04, 2005 Free Software Foundation, Inc.
+ Copyright (C) 1985, 1986, 1987, 1988, 1989, 1993, 1994,
+ 1995, 1997, 1998, 1999, 2000, 2001, 2002,
+ 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
This file is part of GNU Emacs.
extern int errno;
#endif
-#ifndef MAXPATHLEN
-/* in 4.1 [probably SunOS? -stef] , param.h fails to define this. */
-#define MAXPATHLEN 1024
-#endif /* not MAXPATHLEN */
#ifdef HAVE_UNISTD_H
#include <unistd.h>
Lisp_Object Vkill_buffer_query_functions;
Lisp_Object Qkill_buffer_query_functions;
+/* Hook run before changing a major mode. */
+Lisp_Object Vchange_major_mode_hook, Qchange_major_mode_hook;
+
/* List of functions to call before changing an unmodified buffer. */
Lisp_Object Vfirst_change_hook;
BUF_ZV_BYTE (b) = BEG_BYTE;
BUF_Z_BYTE (b) = BEG_BYTE;
BUF_MODIFF (b) = 1;
+ BUF_CHARS_MODIFF (b) = 1;
BUF_OVERLAY_MODIFF (b) = 1;
BUF_SAVE_MODIFF (b) = 1;
BUF_INTERVALS (b) = 0;
clone_per_buffer_values (from, to)
struct buffer *from, *to;
{
- Lisp_Object to_buffer, tem;
+ Lisp_Object to_buffer;
int offset;
XSETBUFFER (to_buffer, to);
result = XCDR (result);
}
- if (EQ (result, Qunbound))
- return Fsignal (Qvoid_variable, Fcons (variable, Qnil));
+ if (!EQ (result, Qunbound))
+ return result;
- return result;
+ xsignal1 (Qvoid_variable, variable);
}
/* Return an alist of the Lisp-level buffer-local bindings of
return make_number (BUF_MODIFF (buf));
}
+
+DEFUN ("buffer-chars-modified-tick", Fbuffer_chars_modified_tick,
+ Sbuffer_chars_modified_tick, 0, 1, 0,
+ doc: /* Return BUFFER's character-change tick counter.
+Each buffer has a character-change tick counter, which is set to the
+value of the buffer's tick counter \(see `buffer-modified-tick'), each
+time text in that buffer is inserted or deleted. By comparing the
+values returned by two individual calls of `buffer-chars-modified-tick',
+you can tell whether a character change occurred in that buffer in
+between these calls. No argument or nil as argument means use current
+buffer as BUFFER. */)
+ (buffer)
+ register Lisp_Object buffer;
+{
+ register struct buffer *buf;
+ if (NILP (buffer))
+ buf = current_buffer;
+ else
+ {
+ CHECK_BUFFER (buffer);
+ buf = XBUFFER (buffer);
+ }
+
+ return make_number (BUF_CHARS_MODIFF (buf));
+}
\f
DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2,
"sRename buffer (to new name): \nP",
*/
DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 1, 1, "bKill buffer: ",
doc: /* Kill the buffer BUFFER.
-The argument may be a buffer or may be the name of a buffer.
-An argument of nil means kill the current buffer.
+The argument may be a buffer or the name of a buffer.
+With a nil argument, kill the current buffer.
+
+Value is t if the buffer is actually killed, nil otherwise.
-Value is t if the buffer is actually killed, nil if user says no.
+The functions in `kill-buffer-query-functions' are called with BUFFER as
+the current buffer. If any of them returns nil, the buffer is not killed.
-The value of `kill-buffer-hook' (which may be local to that buffer),
-if not void, is a list of functions to be called, with no arguments,
-before the buffer is actually killed. The buffer to be killed is current
-when the hook functions are called.
+The hook `kill-buffer-hook' is run before the buffer is actually killed.
+The buffer being killed will be current while the hook is running.
Any processes that have this buffer as the `process-buffer' are killed
with SIGHUP. */)
/* First run the query functions; if any query is answered no,
don't kill the buffer. */
arglist[0] = Qkill_buffer_query_functions;
- if (NILP (Frun_hook_with_args_until_failure (1, arglist)))
+ tem = Frun_hook_with_args_until_failure (1, arglist);
+ if (NILP (tem))
return unbind_to (count, Qnil);
/* Then run the hooks. */
char *err;
if (EQ (buffer, Fwindow_buffer (selected_window)))
- /* Basically a NOP. Avoid signalling an error if the selected window
- is dedicated, or a minibuffer, ... */
- return Fset_buffer (buffer);
+ {
+ /* Basically a NOP. Avoid signalling an error in the case where
+ the selected window is dedicated, or a minibuffer. */
+
+ /* But do put this buffer at the front of the buffer list,
+ unless that has been inhibited. Note that even if
+ BUFFER is at the front of the main buffer-list already,
+ we still want to move it to the front of the frame's buffer list. */
+ if (NILP (norecord))
+ record_buffer (buffer);
+ return Fset_buffer (buffer);
+ }
err = no_switch_window (selected_window);
if (err) error (err);
}
}
Fset_buffer (buf);
- if (NILP (norecord))
- /* Why bother ? Fselect_window will do it for us anyway. -stef */
- record_buffer (buf);
Fselect_window (Fdisplay_buffer (buf, other_window, Qnil), norecord);
return buf;
}
{
if (!NILP (current_buffer->read_only)
&& NILP (Vinhibit_read_only))
- Fsignal (Qbuffer_read_only, (Fcons (Fcurrent_buffer (), Qnil)));
+ xsignal1 (Qbuffer_read_only, Fcurrent_buffer ());
return Qnil;
}
{
struct Lisp_Marker *tail, *markers;
struct buffer *other;
- int undo_enabled_p = !EQ (current_buffer->undo_list, Qt);
int begv, zv;
int narrowed = (BEG != BEGV || Z != ZV);
int modified_p = !NILP (Fbuffer_modified_p (Qnil));
+ Lisp_Object old_undo = current_buffer->undo_list;
+ struct gcpro gcpro1;
if (current_buffer->base_buffer)
error ("Cannot do `set-buffer-multibyte' on an indirect buffer");
if (NILP (flag) == NILP (current_buffer->enable_multibyte_characters))
return flag;
- /* It would be better to update the list,
- but this is good enough for now. */
- if (undo_enabled_p)
- current_buffer->undo_list = Qt;
+ GCPRO1 (old_undo);
+
+ /* Don't record these buffer changes. We will put a special undo entry
+ instead. */
+ current_buffer->undo_list = Qt;
/* If the cached position is for this buffer, clear it out. */
clear_charpos_cache (current_buffer);
set_intervals_multibyte (1);
}
- if (undo_enabled_p)
- current_buffer->undo_list = Qnil;
+ if (!EQ (old_undo, Qt))
+ {
+ /* Represent all the above changes by a special undo entry. */
+ extern Lisp_Object Qapply;
+ current_buffer->undo_list = Fcons (list3 (Qapply,
+ intern ("set-buffer-multibyte"),
+ NILP (flag) ? Qt : Qnil),
+ old_undo);
+ }
+
+ UNGCPRO;
/* Changing the multibyteness of a buffer means that all windows
showing that buffer must be updated thoroughly. */
Lisp_Object oalist;
if (!NILP (Vrun_hooks))
- call1 (Vrun_hooks, intern ("change-major-mode-hook"));
+ call1 (Vrun_hooks, Qchange_major_mode_hook);
oalist = current_buffer->local_var_alist;
/* Make sure none of the bindings in oalist
Return the number found, and store them in a vector in *VEC_PTR.
Store in *LEN_PTR the size allocated for the vector.
Store in *NEXT_PTR the next position after POS where an overlay starts,
- or ZV if there are no more overlays.
+ or ZV if there are no more overlays between POS and ZV.
Store in *PREV_PTR the previous position before POS where an overlay ends,
or where an overlay starts which ends at or after POS;
- or BEGV if there are no such overlays.
+ or BEGV if there are no such overlays from BEGV to POS.
NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
*VEC_PTR and *LEN_PTR should contain a valid vector and size
BEG and END may be integers or markers.
The fourth arg FRONT-ADVANCE, if non-nil, makes the marker
for the front of the overlay advance when text is inserted there
-(which means the text *is not* included in the overlay).
+\(which means the text *is not* included in the overlay).
The fifth arg REAR-ADVANCE, if non-nil, makes the marker
for the rear of the overlay advance when text is inserted there
-(which means the text *is* included in the overlay). */)
+\(which means the text *is* included in the overlay). */)
(beg, end, buffer, front_advance, rear_advance)
Lisp_Object beg, end, buffer;
Lisp_Object front_advance, rear_advance;
/* If multiple windows show this buffer, we must do other windows. */
else if (buffer_shared > 1)
windows_or_buffers_changed = 1;
+ /* If we modify an overlay at the end of the buffer, we cannot
+ be sure that window end is still valid. */
+ else if (end >= ZV && start <= ZV)
+ windows_or_buffers_changed = 1;
++BUF_OVERLAY_MODIFF (buf);
}
DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change,
1, 1, 0,
doc: /* Return the next position after POS where an overlay starts or ends.
-If there are no more overlay boundaries after POS, return (point-max). */)
+If there are no overlay boundaries from POS to (point-max),
+the value is (point-max). */)
(pos)
Lisp_Object pos;
{
DEFUN ("previous-overlay-change", Fprevious_overlay_change,
Sprevious_overlay_change, 1, 1, 0,
doc: /* Return the previous position before POS where an overlay starts or ends.
-If there are no more overlay boundaries before POS, return (point-min). */)
+If there are no overlay boundaries from (point-min) to POS,
+the value is (point-min). */)
(pos)
Lisp_Object pos;
{
== OVERLAY_POSITION (OVERLAY_END (overlay))))
Fdelete_overlay (overlay);
}
+
return value;
}
\f
buffer_defaults.vertical_scroll_bar_type = Qt;
buffer_defaults.indicate_empty_lines = Qnil;
buffer_defaults.indicate_buffer_boundaries = Qnil;
+ buffer_defaults.fringe_indicator_alist = Qnil;
+ buffer_defaults.fringe_cursor_alist = Qnil;
buffer_defaults.scroll_up_aggressively = Qnil;
buffer_defaults.scroll_down_aggressively = Qnil;
buffer_defaults.display_time = Qnil;
XSETFASTINT (buffer_local_flags.vertical_scroll_bar_type, idx); ++idx;
XSETFASTINT (buffer_local_flags.indicate_empty_lines, idx); ++idx;
XSETFASTINT (buffer_local_flags.indicate_buffer_boundaries, idx); ++idx;
+ XSETFASTINT (buffer_local_flags.fringe_indicator_alist, idx); ++idx;
+ XSETFASTINT (buffer_local_flags.fringe_cursor_alist, idx); ++idx;
XSETFASTINT (buffer_local_flags.scroll_up_aggressively, idx); ++idx;
XSETFASTINT (buffer_local_flags.scroll_down_aggressively, idx); ++idx;
XSETFASTINT (buffer_local_flags.header_line_format, idx); ++idx;
void
init_buffer ()
{
- char buf[MAXPATHLEN + 1];
char *pwd;
- struct stat dotstat, pwdstat;
Lisp_Object temp;
- int rc;
+ int len;
#ifdef USE_MMAP_FOR_BUFFERS
{
if (NILP (buffer_defaults.enable_multibyte_characters))
Fset_buffer_multibyte (Qnil);
- /* If PWD is accurate, use it instead of calling getwd. PWD is
- sometimes a nicer name, and using it may avoid a fatal error if a
- parent directory is searchable but not readable. */
- if ((pwd = getenv ("PWD")) != 0
- && (IS_DIRECTORY_SEP (*pwd) || (*pwd && IS_DEVICE_SEP (pwd[1])))
- && stat (pwd, &pwdstat) == 0
- && stat (".", &dotstat) == 0
- && dotstat.st_ino == pwdstat.st_ino
- && dotstat.st_dev == pwdstat.st_dev
- && strlen (pwd) < MAXPATHLEN)
- strcpy (buf, pwd);
-#ifdef HAVE_GETCWD
- else if (getcwd (buf, MAXPATHLEN+1) == 0)
- fatal ("`getcwd' failed: %s\n", strerror (errno));
-#else
- else if (getwd (buf) == 0)
- fatal ("`getwd' failed: %s\n", buf);
-#endif
+ pwd = get_current_dir_name ();
+
+ if (!pwd)
+ fatal ("`get_current_dir_name' failed: %s\n", strerror (errno));
#ifndef VMS
/* Maybe this should really use some standard subroutine
whose definition is filename syntax dependent. */
- rc = strlen (buf);
- if (!(IS_DIRECTORY_SEP (buf[rc - 1])))
+ len = strlen (pwd);
+ if (!(IS_DIRECTORY_SEP (pwd[len - 1])))
{
- buf[rc] = DIRECTORY_SEP;
- buf[rc + 1] = '\0';
+ /* Grow buffer to add directory separator and '\0'. */
+ pwd = (char *) xrealloc (pwd, len + 2);
+ pwd[len] = DIRECTORY_SEP;
+ pwd[len + 1] = '\0';
}
#endif /* not VMS */
- current_buffer->directory = make_unibyte_string (buf, strlen (buf));
+ current_buffer->directory = make_unibyte_string (pwd, strlen (pwd));
if (! NILP (buffer_defaults.enable_multibyte_characters))
- /* At this momemnt, we still don't know how to decode the
- direcotry name. So, we keep the bytes in multibyte form so
+ /* At this moment, we still don't know how to decode the
+ directory name. So, we keep the bytes in multibyte form so
that ENCODE_FILE correctly gets the original bytes. */
current_buffer->directory
= string_to_multibyte (current_buffer->directory);
temp = get_minibuffer (0);
XBUFFER (temp)->directory = current_buffer->directory;
+
+ free (pwd);
}
/* initialize the buffer routines */
This is the same as (default-value 'left-margin). */);
DEFVAR_LISP_NOPRO ("default-tab-width",
- &buffer_defaults.tab_width,
- doc: /* Default value of `tab-width' for buffers that do not override it.
+ &buffer_defaults.tab_width,
+ doc: /* Default value of `tab-width' for buffers that do not override it.
This is the same as (default-value 'tab-width). */);
DEFVAR_LISP_NOPRO ("default-case-fold-search",
doc: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it.
This is the same as (default-value 'indicate-buffer-boundaries). */);
+ DEFVAR_LISP_NOPRO ("default-fringe-indicator-alist",
+ &buffer_defaults.fringe_indicator_alist,
+ doc: /* Default value of `fringe-indicator-alist' for buffers that don't override it.
+This is the same as (default-value 'fringe-indicator-alist'). */);
+
+ DEFVAR_LISP_NOPRO ("default-fringe-cursor-alist",
+ &buffer_defaults.fringe_cursor_alist,
+ doc: /* Default value of `fringe-cursor-alist' for buffers that don't override it.
+This is the same as (default-value 'fringe-cursor-alist'). */);
+
DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively",
&buffer_defaults.scroll_up_aggressively,
doc: /* Default value of `scroll-up-aggressively'.
This value applies in buffers that don't have their own local values.
-This variable is an alias for (default-value 'scroll-up-aggressively). */);
+This is the same as (default-value 'scroll-up-aggressively). */);
DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively",
&buffer_defaults.scroll_down_aggressively,
doc: /* Default value of `scroll-down-aggressively'.
This value applies in buffers that don't have their own local values.
-This variable is an alias for (default-value 'scroll-down-aggressively). */);
+This is the same as (default-value 'scroll-down-aggressively). */);
DEFVAR_PER_BUFFER ("header-line-format",
¤t_buffer->header_line_format,
%p -- print percent of buffer above top of window, or Top, Bot or All.
%P -- print percent of buffer above bottom of window, perhaps plus Top,
or print Bottom or All.
- %m -- print the mode name.
%n -- print Narrow if appropriate.
- %z -- print mnemonics of buffer, terminal, and keyboard coding systems.
+ %t -- visited file is text or binary (if OS supports this distinction).
+ %z -- print mnemonics of keyboard, terminal, and buffer coding systems.
%Z -- like %z, but including the end-of-line format.
+ %e -- print error message about full memory.
%[ -- print one [ for each recursive editing level. %] similar.
%% -- print %. %- -- print infinitely many dashes.
Decimal digits after the % specify field width to which to pad. */);
DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults.major_mode,
doc: /* *Major mode for new buffers. Defaults to `fundamental-mode'.
-nil here means use current buffer's major mode, provided it is not
-marked as "special".
+A value of nil means use current buffer's major mode,
+provided it is not marked as "special".
When a mode is used by default, `find-file' switches to it
before it reads the contents into the buffer and before
DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer->left_margin,
make_number (Lisp_Int),
- doc: /* *Column for the default indent-line-function to indent to.
+ doc: /* *Column for the default `indent-line-function' to indent to.
Linefeed indents to this column in Fundamental mode. */);
DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer->tab_width,
Each of the char-table elements control how to display the corresponding
text character: the element at index C in the table says how to display
the character whose code is C. Each element should be a vector of
-characters or nil. nil means display the character in the default fashion;
-otherwise, the characters from the vector are delivered to the screen
-instead of the original character.
+characters or nil. The value nil means display the character in the
+default fashion; otherwise, the characters from the vector are delivered
+to the screen instead of the original character.
For example, (aset buffer-display-table ?X ?Y) will cause Emacs to display
a capital Y instead of each X character.
bitmaps in right fringe. To show just the angle bitmaps in the left
fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */);
+ DEFVAR_PER_BUFFER ("fringe-indicator-alist",
+ ¤t_buffer->fringe_indicator_alist, Qnil,
+ doc: /* *Mapping from logical to physical fringe indicator bitmaps.
+The value is an alist where each element (INDICATOR . BITMAPS)
+specifies the fringe bitmaps used to display a specific logical
+fringe indicator.
+
+INDICATOR specifies the logical indicator type which is one of the
+following symbols: `truncation' , `continuation', `overlay-arrow',
+`top', `bottom', `up', `down', `one-line', `empty-line', or `unknown'.
+
+BITMAPS is list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies
+the actual bitmap shown in the left or right fringe for the logical
+indicator. LEFT and RIGHT are the bitmaps shown in the left and/or
+right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps
+are used only for the `bottom' and `one-line' indicators when the last
+\(only) line in has no final newline. BITMAPS may also be a single
+symbol which is used in both left and right fringes. */);
+
+ DEFVAR_PER_BUFFER ("fringe-cursor-alist",
+ ¤t_buffer->fringe_cursor_alist, Qnil,
+ doc: /* *Mapping from logical to physical fringe cursor bitmaps.
+The value is an alist where each element (CURSOR . BITMAP)
+specifies the fringe bitmaps used to display a specific logical
+cursor type in the fringe.
+
+CURSOR specifies the logical cursor type which is one of the following
+symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last
+one is used to show a hollow cursor on narrow lines display lines
+where the normal hollow cursor will not fit.
+
+BITMAP is the corresponding fringe bitmap shown for the logical
+cursor type. */);
+
DEFVAR_PER_BUFFER ("scroll-up-aggressively",
¤t_buffer->scroll_up_aggressively, Qnil,
doc: /* How far to scroll windows upward.
If you move point off the bottom, the window scrolls automatically.
-This variable controls how far it scrolls. nil, the default,
+This variable controls how far it scrolls. The value nil, the default,
means scroll to center point. A fraction means scroll to put point
that fraction of the window's height from the bottom of the window.
When the value is 0.0, point goes at the bottom line, which in the simple
¤t_buffer->scroll_down_aggressively, Qnil,
doc: /* How far to scroll windows downward.
If you move point off the top, the window scrolls automatically.
-This variable controls how far it scrolls. nil, the default,
+This variable controls how far it scrolls. The value nil, the default,
means scroll to center point. A fraction means scroll to put point
that fraction of the window's height from the top of the window.
When the value is 0.0, point goes at the top line, which in the simple
location given by the integer. Undoing an entry of this form places
point at POSITION.
-nil marks undo boundaries. The undo command treats the changes
-between two undo boundaries as a single step to be undone.
+Entries with value `nil' mark undo boundaries. The undo command treats
+the changes between two undo boundaries as a single step to be undone.
If the value of the variable is t, undo information is not recorded. */);
Vinhibit_read_only = Qnil;
DEFVAR_PER_BUFFER ("cursor-type", ¤t_buffer->cursor_type, Qnil,
- doc: /* Cursor to use when this buffer is in the selected window.
+ doc: /* Cursor to use when this buffer is in the selected window.
Values are interpreted as follows:
- t use the cursor specified for the frame
- nil don't display a cursor
- box display a filled box cursor
- hollow display a hollow box cursor
- bar display a vertical bar cursor with default width
- (bar . WIDTH) display a vertical bar cursor with width WIDTH
- hbar display a horizontal bar cursor with default height
+ t use the cursor specified for the frame
+ nil don't display a cursor
+ box display a filled box cursor
+ hollow display a hollow box cursor
+ bar display a vertical bar cursor with default width
+ (bar . WIDTH) display a vertical bar cursor with width WIDTH
+ hbar display a horizontal bar cursor with default height
(hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT
- ANYTHING ELSE display a hollow box cursor.
+ ANYTHING ELSE display a hollow box cursor
When the buffer is displayed in a nonselected window,
this variable has no effect; the cursor appears as a hollow box. */);
doc: /* Additional space to put between lines when displaying a buffer.
The space is measured in pixels, and put below lines on window systems.
If value is a floating point number, it specifies the spacing relative
-to the default frame line height. */);
+to the default frame line height. A value of nil means add no extra space. */);
DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows",
¤t_buffer->cursor_in_non_selected_windows, Qnil,
- doc: /* *Cursor type to display in non-selected windows.
-t means to use hollow box cursor. See `cursor-type' for other values. */);
+ doc: /* *Cursor type to display in non-selected windows.
+The value t means to use hollow box cursor. See `cursor-type' for other values. */);
DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions,
- doc: /* List of functions called with no args to query before killing a buffer. */);
+ doc: /* List of functions called with no args to query before killing a buffer.
+The buffer being killed will be current while the functions are running.
+If any of them returns nil, the buffer is not killed. */);
Vkill_buffer_query_functions = Qnil;
+ DEFVAR_LISP ("change-major-mode-hook", &Vchange_major_mode_hook,
+ doc: /* Normal hook run before changing the major mode of a buffer.
+The function `kill-all-local-variables' runs this before doing anything else. */);
+ Vchange_major_mode_hook = Qnil;
+ Qchange_major_mode_hook = intern ("change-major-mode-hook");
+ staticpro (&Qchange_major_mode_hook);
+
defsubr (&Sbuffer_live_p);
defsubr (&Sbuffer_list);
defsubr (&Sget_buffer);
defsubr (&Sbuffer_modified_p);
defsubr (&Sset_buffer_modified_p);
defsubr (&Sbuffer_modified_tick);
+ defsubr (&Sbuffer_chars_modified_tick);
defsubr (&Srename_buffer);
defsubr (&Sother_buffer);
defsubr (&Sbuffer_enable_undo);