X-Git-Url: https://code.delx.au/gnu-emacs/blobdiff_plain/682432fc544c2bb4e0531c2931d43bce085eb16a..fb39b937b0628f4592b07d0aa61a41cf696abd30:/src/indent.c
diff --git a/src/indent.c b/src/indent.c
index 7e2edc8713..b368a7aeb0 100644
--- a/src/indent.c
+++ b/src/indent.c
@@ -1,5 +1,5 @@
/* Indentation functions.
- Copyright (C) 1985-1988, 1993-1995, 1998, 2000-2011
+ Copyright (C) 1985-1988, 1993-1995, 1998, 2000-2012
Free Software Foundation, Inc.
This file is part of GNU Emacs.
@@ -19,11 +19,10 @@ along with GNU Emacs. If not, see . */
#include
#include
-#include
#include "lisp.h"
-#include "buffer.h"
#include "character.h"
+#include "buffer.h"
#include "category.h"
#include "composite.h"
#include "indent.h"
@@ -116,13 +115,13 @@ character_width (int c, struct Lisp_Char_Table *dp)
for characters as WIDTHTAB. We use this to decide when to
invalidate the buffer's width_run_cache. */
-int
+bool
disptab_matches_widthtab (struct Lisp_Char_Table *disptab, struct Lisp_Vector *widthtab)
{
int i;
if (widthtab->header.size != 256)
- abort ();
+ emacs_abort ();
for (i = 0; i < 256; i++)
if (character_width (i, disptab)
@@ -141,10 +140,10 @@ recompute_width_table (struct buffer *buf, struct Lisp_Char_Table *disptab)
struct Lisp_Vector *widthtab;
if (!VECTORP (BVAR (buf, width_table)))
- BVAR (buf, width_table) = Fmake_vector (make_number (256), make_number (0));
+ bset_width_table (buf, Fmake_vector (make_number (256), make_number (0)));
widthtab = XVECTOR (BVAR (buf, width_table));
if (widthtab->header.size != 256)
- abort ();
+ emacs_abort ();
for (i = 0; i < 256; i++)
XSETFASTINT (widthtab->contents[i], character_width (i, disptab));
@@ -166,7 +165,7 @@ width_run_cache_on_off (void)
{
free_region_cache (current_buffer->width_run_cache);
current_buffer->width_run_cache = 0;
- BVAR (current_buffer, width_table) = Qnil;
+ bset_width_table (current_buffer, Qnil);
}
}
else
@@ -321,14 +320,14 @@ invalidate_current_column (void)
ptrdiff_t
current_column (void)
{
- register ptrdiff_t col;
- register unsigned char *ptr, *stop;
- register int tab_seen;
+ ptrdiff_t col;
+ unsigned char *ptr, *stop;
+ bool tab_seen;
ptrdiff_t post_tab;
- register int c;
+ int c;
int tab_width = SANE_TAB_WIDTH (current_buffer);
- int ctl_arrow = !NILP (BVAR (current_buffer, ctl_arrow));
- register struct Lisp_Char_Table *dp = buffer_display_table ();
+ bool ctl_arrow = !NILP (BVAR (current_buffer, ctl_arrow));
+ struct Lisp_Char_Table *dp = buffer_display_table ();
if (PT == last_known_column_point
&& MODIFF == last_known_column_modified)
@@ -336,9 +335,8 @@ current_column (void)
/* If the buffer has overlays, text properties,
or multibyte characters, use a more general algorithm. */
- if (BUF_INTERVALS (current_buffer)
- || current_buffer->overlays_before
- || current_buffer->overlays_after
+ if (buffer_intervals (current_buffer)
+ || buffer_has_overlays ()
|| Z != Z_BYTE)
return current_column_1 ();
@@ -514,9 +512,9 @@ static void
scan_for_column (ptrdiff_t *endpos, EMACS_INT *goalcol, ptrdiff_t *prevcol)
{
int tab_width = SANE_TAB_WIDTH (current_buffer);
- register int ctl_arrow = !NILP (BVAR (current_buffer, ctl_arrow));
- register struct Lisp_Char_Table *dp = buffer_display_table ();
- int multibyte = !NILP (BVAR (current_buffer, enable_multibyte_characters));
+ bool ctl_arrow = !NILP (BVAR (current_buffer, ctl_arrow));
+ struct Lisp_Char_Table *dp = buffer_display_table ();
+ bool multibyte = !NILP (BVAR (current_buffer, enable_multibyte_characters));
struct composition_it cmp_it;
Lisp_Object window;
struct window *w;
@@ -724,14 +722,14 @@ current_column_1 (void)
static double
string_display_width (Lisp_Object string, Lisp_Object beg, Lisp_Object end)
{
- register int col;
- register unsigned char *ptr, *stop;
- register int tab_seen;
+ int col;
+ unsigned char *ptr, *stop;
+ bool tab_seen;
int post_tab;
- register int c;
+ int c;
int tab_width = SANE_TAB_WIDTH (current_buffer);
- int ctl_arrow = !NILP (current_buffer->ctl_arrow);
- register struct Lisp_Char_Table *dp = buffer_display_table ();
+ bool ctl_arrow = !NILP (current_buffer->ctl_arrow);
+ struct Lisp_Char_Table *dp = buffer_display_table ();
int b, e;
if (NILP (end))
@@ -947,7 +945,7 @@ position_indentation (ptrdiff_t pos_byte)
Blank lines are treated as if they had the same indentation as the
preceding line. */
-int
+bool
indented_beyond_p (ptrdiff_t pos, ptrdiff_t pos_byte, EMACS_INT column)
{
ptrdiff_t val;
@@ -962,7 +960,8 @@ indented_beyond_p (ptrdiff_t pos, ptrdiff_t pos_byte, EMACS_INT column)
return val >= column;
}
-DEFUN ("move-to-column", Fmove_to_column, Smove_to_column, 1, 2, "p",
+DEFUN ("move-to-column", Fmove_to_column, Smove_to_column, 1, 2,
+ "NMove to column: ",
doc: /* Move point to column COLUMN in the current line.
Interactively, COLUMN is the value of prefix numeric argument.
The column of a character is calculated by adding together the widths
@@ -1048,11 +1047,11 @@ static struct position val_compute_motion;
can't hit the requested column exactly (because of a tab or other
multi-column character), overshoot.
- DID_MOTION is 1 if FROMHPOS has already accounted for overlay strings
+ DID_MOTION is true if FROMHPOS has already accounted for overlay strings
at FROM. This is the case if FROMVPOS and FROMVPOS came from an
earlier call to compute_motion. The other common case is that FROMHPOS
is zero and FROM is a position that "belongs" at column zero, but might
- be shifted by overlay strings; in this case DID_MOTION should be 0.
+ be shifted by overlay strings; in this case DID_MOTION should be false.
WIDTH is the number of columns available to display text;
compute_motion uses this to handle continuation lines and such.
@@ -1105,17 +1104,20 @@ static struct position val_compute_motion;
the scroll bars if they are turned on. */
struct position *
-compute_motion (ptrdiff_t from, EMACS_INT fromvpos, EMACS_INT fromhpos, int did_motion, ptrdiff_t to, EMACS_INT tovpos, EMACS_INT tohpos, EMACS_INT width, ptrdiff_t hscroll, int tab_offset, struct window *win)
+compute_motion (ptrdiff_t from, EMACS_INT fromvpos, EMACS_INT fromhpos,
+ bool did_motion, ptrdiff_t to,
+ EMACS_INT tovpos, EMACS_INT tohpos, EMACS_INT width,
+ ptrdiff_t hscroll, int tab_offset, struct window *win)
{
- register EMACS_INT hpos = fromhpos;
- register EMACS_INT vpos = fromvpos;
+ EMACS_INT hpos = fromhpos;
+ EMACS_INT vpos = fromvpos;
- register ptrdiff_t pos;
+ ptrdiff_t pos;
ptrdiff_t pos_byte;
- register int c = 0;
+ int c = 0;
int tab_width = SANE_TAB_WIDTH (current_buffer);
- register int ctl_arrow = !NILP (BVAR (current_buffer, ctl_arrow));
- register struct Lisp_Char_Table *dp = window_display_table (win);
+ bool ctl_arrow = !NILP (BVAR (current_buffer, ctl_arrow));
+ struct Lisp_Char_Table *dp = window_display_table (win);
EMACS_INT selective
= (INTEGERP (BVAR (current_buffer, selective_display))
? XINT (BVAR (current_buffer, selective_display))
@@ -1135,13 +1137,12 @@ compute_motion (ptrdiff_t from, EMACS_INT fromvpos, EMACS_INT fromhpos, int did_
ptrdiff_t width_run_end = from;
ptrdiff_t width_run_width = 0;
Lisp_Object *width_table;
- Lisp_Object buffer;
/* The next buffer pos where we should consult the width run cache. */
ptrdiff_t next_width_run = from;
Lisp_Object window;
- int multibyte = !NILP (BVAR (current_buffer, enable_multibyte_characters));
+ bool multibyte = !NILP (BVAR (current_buffer, enable_multibyte_characters));
/* If previous char scanned was a wide character,
this is the column where it ended. Otherwise, this is 0. */
EMACS_INT wide_column_end_hpos = 0;
@@ -1155,7 +1156,6 @@ compute_motion (ptrdiff_t from, EMACS_INT fromvpos, EMACS_INT fromhpos, int did_
struct composition_it cmp_it;
- XSETBUFFER (buffer, current_buffer);
XSETWINDOW (window, win);
width_run_cache_on_off ();
@@ -1311,7 +1311,7 @@ compute_motion (ptrdiff_t from, EMACS_INT fromvpos, EMACS_INT fromhpos, int did_
if (hpos > width)
{
EMACS_INT total_width = width + continuation_glyph_width;
- int truncate = 0;
+ bool truncate = 0;
if (!NILP (Vtruncate_partial_width_windows)
&& (total_width < FRAME_COLS (XFRAME (WINDOW_FRAME (win)))))
@@ -1816,7 +1816,7 @@ static struct position val_vmotion;
struct position *
vmotion (register ptrdiff_t from, register EMACS_INT vtarget, struct window *w)
{
- ptrdiff_t hscroll = XINT (w->hscroll);
+ ptrdiff_t hscroll = w->hscroll;
struct position pos;
/* vpos is cumulative vertical position, changed as from is changed */
register EMACS_INT vpos = 0;
@@ -1830,7 +1830,7 @@ vmotion (register ptrdiff_t from, register EMACS_INT vtarget, struct window *w)
PTRDIFF_MAX)
: !NILP (BVAR (current_buffer, selective_display)) ? -1 : 0);
Lisp_Object window;
- int did_motion;
+ bool did_motion;
/* This is the object we use for fetching character properties. */
Lisp_Object text_prop_object;
@@ -2005,9 +2005,9 @@ whether or not it is currently displayed in some window. */)
old_buffer = w->buffer;
old_charpos = XMARKER (w->pointm)->charpos;
old_bytepos = XMARKER (w->pointm)->bytepos;
- XSETBUFFER (w->buffer, current_buffer);
- set_marker_both
- (w->pointm, w->buffer, BUF_PT (current_buffer), BUF_PT_BYTE (current_buffer));
+ wset_buffer (w, Fcurrent_buffer ());
+ set_marker_both (w->pointm, w->buffer,
+ BUF_PT (current_buffer), BUF_PT_BYTE (current_buffer));
}
if (noninteractive)
@@ -2020,7 +2020,8 @@ whether or not it is currently displayed in some window. */)
{
ptrdiff_t it_start, it_overshoot_count = 0;
int first_x;
- int overshoot_handled = 0;
+ bool overshoot_handled = 0;
+ bool disp_string_at_start_p = 0;
itdata = bidi_shelve_cache ();
SET_TEXT_POS (pt, PT, PT_BYTE);
@@ -2035,6 +2036,8 @@ whether or not it is currently displayed in some window. */)
{
const char *s = SSDATA (it.string);
const char *e = s + SBYTES (it.string);
+
+ disp_string_at_start_p = it.string_from_display_prop_p;
while (s < e)
{
if (*s++ == '\n')
@@ -2062,7 +2065,8 @@ whether or not it is currently displayed in some window. */)
/* IT may move too far if truncate-lines is on and PT lies
beyond the right margin. IT may also move too far if the
starting point is on a Lisp string that has embedded
- newlines. In these cases, backtrack. */
+ newlines, or spans several screen lines. In these cases,
+ backtrack. */
if (IT_CHARPOS (it) > it_start)
{
/* We need to backtrack also if the Lisp string contains no
@@ -2073,6 +2077,14 @@ whether or not it is currently displayed in some window. */)
&& it.method == GET_FROM_BUFFER
&& it.c == '\n')
it_overshoot_count = 1;
+ else if (disp_string_at_start_p && it.vpos > 0)
+ {
+ /* This is the case of a display string that spans
+ several screen lines. In that case, we end up at the
+ end of the string, and it.vpos tells us how many
+ screen lines we need to backtrack. */
+ it_overshoot_count = it.vpos;
+ }
if (it_overshoot_count > 0)
move_it_by_lines (&it, -it_overshoot_count);
@@ -2136,8 +2148,9 @@ whether or not it is currently displayed in some window. */)
if (BUFFERP (old_buffer))
{
- w->buffer = old_buffer;
- set_marker_both (w->pointm, w->buffer, old_charpos, old_bytepos);
+ wset_buffer (w, old_buffer);
+ set_marker_both (w->pointm, w->buffer,
+ old_charpos, old_bytepos);
}
RETURN_UNGCPRO (make_number (it.vpos));
@@ -2151,7 +2164,7 @@ void
syms_of_indent (void)
{
DEFVAR_BOOL ("indent-tabs-mode", indent_tabs_mode,
- doc: /* *Indentation can insert tabs if this is non-nil. */);
+ doc: /* Indentation can insert tabs if this is non-nil. */);
indent_tabs_mode = 1;
defsubr (&Scurrent_indentation);