/* Indentation functions.
- Copyright (C) 1985,86,87,88,93,94,95,98 Free Software Foundation, Inc.
+ Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995, 1998, 2000, 2001,
+ 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
This file is part of GNU Emacs.
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, Inc., 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
-
+the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+Boston, MA 02110-1301, USA. */
#include <config.h>
#include "lisp.h"
#include "region-cache.h"
/* Indentation can insert tabs if this is non-zero;
- otherwise always uses spaces */
-int indent_tabs_mode;
+ otherwise always uses spaces. */
-#define min(a, b) ((a) < (b) ? (a) : (b))
-#define max(a, b) ((a) > (b) ? (a) : (b))
+int indent_tabs_mode;
#define CR 015
-/* These three values memoize the current column to avoid recalculation */
-/* Some things in set last_known_column_point to -1
- to mark the memoized value as invalid */
-/* Last value returned by current_column */
-int last_known_column;
-/* Value of point when current_column was called */
+/* These three values memorize the current column to avoid recalculation. */
+
+/* Last value returned by current_column.
+ Some things in set last_known_column_point to -1
+ to mark the memorized value as invalid. */
+
+double last_known_column;
+
+/* Value of point when current_column was called. */
+
int last_known_column_point;
-/* Value of MODIFF when current_column was called */
+
+/* Value of MODIFF when current_column was called. */
+
int last_known_column_modified;
-static int current_column_1 ();
-static int position_indentation ();
+static double current_column_1 P_ ((void));
+static double position_indentation P_ ((int));
/* Cache of beginning of line found by the last call of
current_column. */
+
int current_column_bol_cache;
/* Get the display table to use for the current buffer. */
/* Return true iff the display table DISPTAB specifies the same widths
for characters as WIDTHTAB. We use this to decide when to
invalidate the buffer's width_run_cache. */
+
int
disptab_matches_widthtab (disptab, widthtab)
struct Lisp_Char_Table *disptab;
}
/* Recompute BUF's width table, using the display table DISPTAB. */
+
void
recompute_width_table (buf, disptab)
struct buffer *buf;
/* Allocate or free the width run cache, as requested by the current
state of current_buffer's cache_long_line_scans variable. */
+
static void
width_run_cache_on_off ()
{
Lisp_Object window;
{
Lisp_Object prop, position, overlay_limit, proplimit;
- Lisp_Object buffer;
- int end;
+ Lisp_Object buffer, tmp;
+ int end, inv_p;
XSETFASTINT (position, pos);
XSETBUFFER (buffer, current_buffer);
/* No matter what. don't go past next overlay change. */
if (XFASTINT (overlay_limit) < XFASTINT (proplimit))
proplimit = overlay_limit;
- end = XFASTINT (Fnext_single_property_change (position, Qinvisible,
- buffer, proplimit));
+ tmp = Fnext_single_property_change (position, Qinvisible,
+ buffer, proplimit);
+ end = XFASTINT (tmp);
#if 0
/* Don't put the boundary in the middle of multibyte form if
there is no actual property change. */
}
/* if the `invisible' property is set, we can skip to
the next property change */
- if (!NILP (window) && EQ (XWINDOW (window)->buffer, buffer))
- prop = Fget_char_property (position, Qinvisible, window);
- else
- prop = Fget_char_property (position, Qinvisible, buffer);
- if (TEXT_PROP_MEANS_INVISIBLE (prop))
+ prop = Fget_char_property (position, Qinvisible,
+ (!NILP (window)
+ && EQ (XWINDOW (window)->buffer, buffer))
+ ? window : buffer);
+ inv_p = TEXT_PROP_MEANS_INVISIBLE (prop);
+ /* When counting columns (window == nil), don't skip over ellipsis text. */
+ if (NILP (window) ? inv_p == 1 : inv_p)
return *next_boundary_p;
return pos;
}
int id;
if (! find_composition (pos, -1, &start, &end, &prop, Qnil)
- || pos != start || point < end)
+ || pos != start || point < end
+ || !COMPOSITION_VALID_P (start, end, prop))
return 0;
if ((id = get_composition_id (pos, pos_byte, end - pos, prop, Qnil)) < 0)
return 0;
} \
} while (0)
+
DEFUN ("current-column", Fcurrent_column, Scurrent_column, 0, 0, 0,
- "Return the horizontal position of point. Beginning of line is column 0.\n\
-This is calculated by adding together the widths of all the displayed\n\
-representations of the character between the start of the previous line\n\
-and point. (eg control characters will have a width of 2 or 4, tabs\n\
-will have a variable width)\n\
-Ignores finite width of frame, which means that this function may return\n\
-values greater than (frame-width).\n\
-Whether the line is visible (if `selective-display' is t) has no effect;\n\
-however, ^M is treated as end of line when `selective-display' is t.")
- ()
+ doc: /* Return the horizontal position of point. Beginning of line is column 0.
+This is calculated by adding together the widths of all the displayed
+representations of the character between the start of the previous line
+and point. (eg control characters will have a width of 2 or 4, tabs
+will have a variable width)
+Ignores finite width of frame, which means that this function may return
+values greater than (frame-width).
+Whether the line is visible (if `selective-display' is t) has no effect;
+however, ^M is treated as end of line when `selective-display' is t.
+Text that has an invisible property is considered as having width 0, unless
+`buffer-invisibility-spec' specifies that it is replaced by an ellipsis. */)
+ ()
{
Lisp_Object temp;
- XSETFASTINT (temp, current_column ());
+ XSETFASTINT (temp, (int) current_column ()); /* iftc */
return temp;
}
last_known_column_point = 0;
}
-int
+double
current_column ()
{
register int col;
register int tab_width = XINT (current_buffer->tab_width);
int ctl_arrow = !NILP (current_buffer->ctl_arrow);
register struct Lisp_Char_Table *dp = buffer_display_table ();
- int stopchar;
if (PT == last_known_column_point
&& MODIFF == last_known_column_modified)
/* If the buffer has overlays, text properties,
or multibyte characters, use a more general algorithm. */
if (BUF_INTERVALS (current_buffer)
- || !NILP (current_buffer->overlays_before)
- || !NILP (current_buffer->overlays_after)
+ || current_buffer->overlays_before
+ || current_buffer->overlays_after
|| Z != Z_BYTE)
return current_column_1 ();
else
stop = GAP_END_ADDR;
- if (tab_width <= 0 || tab_width > 1000) tab_width = 8;
+ if (tab_width <= 0 || tab_width > 1000)
+ tab_width = 8;
col = 0, tab_seen = 0, post_tab = 0;
while (1)
{
+ EMACS_INT i, n;
+ Lisp_Object charvec;
+
if (ptr == stop)
{
/* We stopped either for the beginning of the buffer
or for the gap. */
if (ptr == BEGV_ADDR)
break;
+
/* It was the gap. Jump back over it. */
stop = BEGV_ADDR;
ptr = GPT_ADDR;
+
/* Check whether that brings us to beginning of buffer. */
- if (BEGV >= GPT) break;
+ if (BEGV >= GPT)
+ break;
}
c = *--ptr;
- if (dp != 0 && VECTORP (DISP_CHAR_VECTOR (dp, c)))
- col += XVECTOR (DISP_CHAR_VECTOR (dp, c))->size;
- else if (c >= 040 && c < 0177)
- col++;
- else if (c == '\n'
- || (c == '\r' && EQ (current_buffer->selective_display, Qt)))
+
+ if (dp && VECTORP (DISP_CHAR_VECTOR (dp, c)))
{
- ptr++;
- break;
+ charvec = DISP_CHAR_VECTOR (dp, c);
+ n = ASIZE (charvec);
}
- else if (c == '\t')
+ else
{
- if (tab_seen)
- col = ((col + tab_width) / tab_width) * tab_width;
+ charvec = Qnil;
+ n = 1;
+ }
- post_tab += col;
- col = 0;
- tab_seen = 1;
+ for (i = n - 1; i >= 0; --i)
+ {
+ if (VECTORP (charvec))
+ {
+ /* This should be handled the same as
+ next_element_from_display_vector does it. */
+ Lisp_Object entry = AREF (charvec, i);
+
+ if (INTEGERP (entry)
+ && GLYPH_CHAR_VALID_P (XFASTINT (entry)))
+ c = FAST_GLYPH_CHAR (XFASTINT (entry));
+ else
+ c = ' ';
+ }
+
+ if (c >= 040 && c < 0177)
+ col++;
+ else if (c == '\n'
+ || (c == '\r'
+ && EQ (current_buffer->selective_display, Qt)))
+ {
+ ptr++;
+ goto start_of_line_found;
+ }
+ else if (c == '\t')
+ {
+ if (tab_seen)
+ col = ((col + tab_width) / tab_width) * tab_width;
+
+ post_tab += col;
+ col = 0;
+ tab_seen = 1;
+ }
+ else if (VECTORP (charvec))
+ /* With a display table entry, C is displayed as is, and
+ not displayed as \NNN or as ^N. If C is a single-byte
+ character, it takes one column. If C is multi-byte in
+ an unibyte buffer, it's translated to unibyte, so it
+ also takes one column. */
+ ++col;
+ else
+ col += (ctl_arrow && c < 0200) ? 2 : 4;
}
- else
- col += (ctl_arrow && c < 0200) ? 2 : 4;
}
+ start_of_line_found:
+
if (tab_seen)
{
col = ((col + tab_width) / tab_width) * tab_width;
This function handles characters that are invisible
due to text properties or overlays. */
-static int
+static double
current_column_1 ()
{
register int tab_width = XINT (current_buffer->tab_width);
/* Start the scan at the beginning of this line with column number 0. */
register int col = 0;
int scan, scan_byte;
- int next_boundary, next_boundary_byte;
+ int next_boundary;
int opoint = PT, opoint_byte = PT_BYTE;
scan_newline (PT, PT_BYTE, BEGV, BEGV_BYTE, -1, 1);
scan = PT, scan_byte = PT_BYTE;
SET_PT_BOTH (opoint, opoint_byte);
next_boundary = scan;
- next_boundary_byte = scan_byte;
if (tab_width <= 0 || tab_width > 1000) tab_width = 8;
goto endloop;
if (scan != old_scan)
scan_byte = CHAR_TO_BYTE (scan);
- next_boundary_byte = CHAR_TO_BYTE (next_boundary);
}
/* Check composition sequence. */
}
c = FETCH_BYTE (scan_byte);
+
if (dp != 0
&& ! (multibyte && BASE_LEADING_CODE_P (c))
&& VECTORP (DISP_CHAR_VECTOR (dp, c)))
{
- col += XVECTOR (DISP_CHAR_VECTOR (dp, c))->size;
- scan++;
- scan_byte++;
- continue;
- }
- if (c == '\n')
- break;
- if (c == '\r' && EQ (current_buffer->selective_display, Qt))
- break;
- scan++;
- scan_byte++;
- if (c == '\t')
- {
- int prev_col = col;
- col += tab_width;
- col = col / tab_width * tab_width;
+ Lisp_Object charvec;
+ EMACS_INT i, n;
+
+ /* This character is displayed using a vector of glyphs.
+ Update the column based on those glyphs. */
+
+ charvec = DISP_CHAR_VECTOR (dp, c);
+ n = ASIZE (charvec);
+
+ for (i = 0; i < n; i++)
+ {
+ /* This should be handled the same as
+ next_element_from_display_vector does it. */
+ Lisp_Object entry;
+ entry = AREF (charvec, i);
+
+ if (INTEGERP (entry)
+ && GLYPH_CHAR_VALID_P (XFASTINT (entry)))
+ c = FAST_GLYPH_CHAR (XFASTINT (entry));
+ else
+ c = ' ';
+
+ if (c == '\n')
+ goto endloop;
+ if (c == '\r' && EQ (current_buffer->selective_display, Qt))
+ goto endloop;
+ if (c == '\t')
+ {
+ col += tab_width;
+ col = col / tab_width * tab_width;
+ }
+ else
+ ++col;
+ }
}
- else if (multibyte && BASE_LEADING_CODE_P (c))
+ else
{
- unsigned char *ptr;
- int bytes, width, wide_column;
-
- scan_byte--;
- ptr = BYTE_POS_ADDR (scan_byte);
- MULTIBYTE_BYTES_WIDTH (ptr, dp);
- scan_byte += bytes;
- col += width;
+ /* The display table says nothing for this character.
+ Display it as itself. */
+
+ if (c == '\n')
+ goto endloop;
+ if (c == '\r' && EQ (current_buffer->selective_display, Qt))
+ goto endloop;
+ if (c == '\t')
+ {
+ col += tab_width;
+ col = col / tab_width * tab_width;
+ }
+ else if (multibyte && BASE_LEADING_CODE_P (c))
+ {
+ unsigned char *ptr;
+ int bytes, width, wide_column;
+
+ ptr = BYTE_POS_ADDR (scan_byte);
+ MULTIBYTE_BYTES_WIDTH (ptr, dp);
+ scan_byte += bytes;
+ /* Subtract one to compensate for the increment
+ that is going to happen below. */
+ scan_byte--;
+ col += width;
+ }
+ else if (ctl_arrow && (c < 040 || c == 0177))
+ col += 2;
+ else if (c < 040 || c >= 0177)
+ col += 4;
+ else
+ col++;
}
- else if (ctl_arrow && (c < 040 || c == 0177))
- col += 2;
- else if (c < 040 || c >= 0177)
- col += 4;
- else
- col++;
+ scan++;
+ scan_byte++;
+
}
endloop:
return col;
}
\f
+
+#if 0 /* Not used. */
+
/* Return the width in columns of the part of STRING from BEG to END.
If BEG is nil, that stands for the beginning of STRING.
If END is nil, that stands for the end of STRING. */
-static int
+static double
string_display_width (string, beg, end)
Lisp_Object string, beg, end;
{
int b, e;
if (NILP (end))
- e = XSTRING (string)->size;
+ e = SCHARS (string);
else
{
- CHECK_NUMBER (end, 0);
+ CHECK_NUMBER (end);
e = XINT (end);
}
b = 0;
else
{
- CHECK_NUMBER (beg, 0);
+ CHECK_NUMBER (beg);
b = XINT (beg);
}
/* Make a pointer for decrementing through the chars before point. */
- ptr = XSTRING (string)->data + e;
+ ptr = SDATA (string) + e;
/* Make a pointer to where consecutive chars leave off,
going backwards from point. */
- stop = XSTRING (string)->data + b;
+ stop = SDATA (string) + b;
if (tab_width <= 0 || tab_width > 1000) tab_width = 8;
return col;
}
+
+#endif /* 0 */
+
\f
DEFUN ("indent-to", Findent_to, Sindent_to, 1, 2, "NIndent to column: ",
- "Indent from point with tabs and spaces until COLUMN is reached.\n\
-Optional second argument MININUM says always do at least MININUM spaces\n\
-even if that goes past COLUMN; by default, MININUM is zero.")
- (column, minimum)
+ doc: /* Indent from point with tabs and spaces until COLUMN is reached.
+Optional second argument MININUM says always do at least MININUM spaces
+even if that goes past COLUMN; by default, MININUM is zero. */)
+ (column, minimum)
Lisp_Object column, minimum;
{
int mincol;
register int fromcol;
register int tab_width = XINT (current_buffer->tab_width);
- CHECK_NUMBER (column, 0);
+ CHECK_NUMBER (column);
if (NILP (minimum))
XSETFASTINT (minimum, 0);
- CHECK_NUMBER (minimum, 1);
+ CHECK_NUMBER (minimum);
fromcol = current_column ();
mincol = fromcol + XINT (minimum);
}
\f
-static int position_indentation P_ ((int));
+static double position_indentation P_ ((int));
DEFUN ("current-indentation", Fcurrent_indentation, Scurrent_indentation,
- 0, 0, 0,
- "Return the indentation of the current line.\n\
-This is the horizontal position of the character\n\
-following any initial whitespace.")
- ()
+ 0, 0, 0,
+ doc: /* Return the indentation of the current line.
+This is the horizontal position of the character
+following any initial whitespace. */)
+ ()
{
Lisp_Object val;
int opoint = PT, opoint_byte = PT_BYTE;
scan_newline (PT, PT_BYTE, BEGV, BEGV_BYTE, -1, 1);
- XSETFASTINT (val, position_indentation (PT_BYTE));
+ XSETFASTINT (val, (int) position_indentation (PT_BYTE)); /* iftc */
SET_PT_BOTH (opoint, opoint_byte);
return val;
}
-static int
+static double
position_indentation (pos_byte)
register int pos_byte;
{
/* The -1 and +1 arrange to point at the first byte of gap
(if STOP_POS_BYTE is the position of the gap)
rather than at the data after the gap. */
-
+
stop = BYTE_POS_ADDR (stop_pos_byte - 1) + 1;
p = BYTE_POS_ADDR (pos_byte);
}
int
indented_beyond_p (pos, pos_byte, column)
- int pos, pos_byte, column;
+ int pos, pos_byte;
+ double column;
{
- int val;
+ double val;
int opoint = PT, opoint_byte = PT_BYTE;
SET_PT_BOTH (pos, pos_byte);
val = position_indentation (PT_BYTE);
SET_PT_BOTH (opoint, opoint_byte);
- return val >= column;
+ return val >= column; /* hmm, float comparison */
}
\f
DEFUN ("move-to-column", Fmove_to_column, Smove_to_column, 1, 2, "p",
- "Move point to column COLUMN in the current line.\n\
-The column of a character is calculated by adding together the widths\n\
-as displayed of the previous characters in the line.\n\
-This function ignores line-continuation;\n\
-there is no upper limit on the column number a character can have\n\
-and horizontal scrolling has no effect.\n\
-\n\
-If specified column is within a character, point goes after that character.\n\
-If it's past end of line, point goes to end of line.\n\n\
-A non-nil second (optional) argument FORCE means,\n\
-if COLUMN is in the middle of a tab character, change it to spaces.\n\
-In addition, if FORCE is t, and the line is too short\n\
-to reach column COLUMN, add spaces/tabs to get there.\n\
-\n\
-The return value is the current column.")
- (column, force)
+ doc: /* Move point to column COLUMN in the current line.
+The column of a character is calculated by adding together the widths
+as displayed of the previous characters in the line.
+This function ignores line-continuation;
+there is no upper limit on the column number a character can have
+and horizontal scrolling has no effect.
+
+If specified column is within a character, point goes after that character.
+If it's past end of line, point goes to end of line.
+
+A non-nil second (optional) argument FORCE means,
+if COLUMN is in the middle of a tab character, change it to spaces.
+In addition, if FORCE is t, and the line is too short
+to reach column COLUMN, add spaces/tabs to get there.
+
+The return value is the current column. */)
+ (column, force)
Lisp_Object column, force;
{
register int pos;
Lisp_Object val;
int prev_col = 0;
int c = 0;
- int next_boundary;
-
- int pos_byte, end_byte, next_boundary_byte;
+ int next_boundary, pos_byte;
if (tab_width <= 0 || tab_width > 1000) tab_width = 8;
- CHECK_NATNUM (column, 0);
+ CHECK_NATNUM (column);
goal = XINT (column);
pos = PT;
pos_byte = PT_BYTE;
end = ZV;
- end_byte = ZV_BYTE;
next_boundary = pos;
- next_boundary_byte = PT_BYTE;
/* If we're starting past the desired column,
back up to beginning of line and scan from there. */
pos = skip_invisible (pos, &next_boundary, end, Qnil);
if (pos != prev)
pos_byte = CHAR_TO_BYTE (pos);
- next_boundary_byte = CHAR_TO_BYTE (next_boundary);
if (pos >= end)
goto endloop;
}
}
c = FETCH_BYTE (pos_byte);
+
+ /* See if there is a display table and it relates
+ to this character. */
+
if (dp != 0
&& ! (multibyte && BASE_LEADING_CODE_P (c))
&& VECTORP (DISP_CHAR_VECTOR (dp, c)))
{
- col += XVECTOR (DISP_CHAR_VECTOR (dp, c))->size;
- pos_byte++;
- pos++;
- continue;
- }
- if (c == '\n')
- break;
- if (c == '\r' && EQ (current_buffer->selective_display, Qt))
- break;
- pos++;
- pos_byte++;
- if (c == '\t')
- {
- prev_col = col;
- col += tab_width;
- col = col / tab_width * tab_width;
+ Lisp_Object charvec;
+ EMACS_INT i, n;
+
+ /* This character is displayed using a vector of glyphs.
+ Update the position based on those glyphs. */
+
+ charvec = DISP_CHAR_VECTOR (dp, c);
+ n = ASIZE (charvec);
+
+ for (i = 0; i < n; i++)
+ {
+ /* This should be handled the same as
+ next_element_from_display_vector does it. */
+
+ Lisp_Object entry;
+ entry = AREF (charvec, i);
+
+ if (INTEGERP (entry)
+ && GLYPH_CHAR_VALID_P (XFASTINT (entry)))
+ c = FAST_GLYPH_CHAR (XFASTINT (entry));
+ else
+ c = ' ';
+
+ if (c == '\n')
+ goto endloop;
+ if (c == '\r' && EQ (current_buffer->selective_display, Qt))
+ goto endloop;
+ if (c == '\t')
+ {
+ prev_col = col;
+ col += tab_width;
+ col = col / tab_width * tab_width;
+ }
+ else
+ ++col;
+ }
}
- else if (ctl_arrow && (c < 040 || c == 0177))
- col += 2;
- else if (c < 040 || c == 0177)
- col += 4;
- else if (c < 0177)
- col++;
- else if (multibyte && BASE_LEADING_CODE_P (c))
+ else
{
- /* Start of multi-byte form. */
- unsigned char *ptr;
- int bytes, width, wide_column;
-
- pos_byte--;
- ptr = BYTE_POS_ADDR (pos_byte);
- MULTIBYTE_BYTES_WIDTH (ptr, dp);
- pos_byte += bytes;
- col += width;
+ /* The display table doesn't affect this character;
+ it displays as itself. */
+
+ if (c == '\n')
+ goto endloop;
+ if (c == '\r' && EQ (current_buffer->selective_display, Qt))
+ goto endloop;
+ if (c == '\t')
+ {
+ prev_col = col;
+ col += tab_width;
+ col = col / tab_width * tab_width;
+ }
+ else if (ctl_arrow && (c < 040 || c == 0177))
+ col += 2;
+ else if (c < 040 || c == 0177)
+ col += 4;
+ else if (c < 0177)
+ col++;
+ else if (multibyte && BASE_LEADING_CODE_P (c))
+ {
+ /* Start of multi-byte form. */
+ unsigned char *ptr;
+ int bytes, width, wide_column;
+
+ ptr = BYTE_POS_ADDR (pos_byte);
+ MULTIBYTE_BYTES_WIDTH (ptr, dp);
+ pos_byte += bytes - 1;
+ col += width;
+ }
+ else
+ col += 4;
}
- else
- col += 4;
+
+ pos++;
+ pos_byte++;
}
endloop:
goal_pt_byte = PT_BYTE;
Findent_to (make_number (col), Qnil);
SET_PT_BOTH (goal_pt, goal_pt_byte);
-
+
/* Set the last_known... vars consistently. */
col = goal;
}
WIDTH is the number of columns available to display text;
compute_motion uses this to handle continuation lines and such.
+ If WIDTH is -1, use width of window's text area adjusted for
+ continuation glyph when needed.
+
HSCROLL is the number of columns not being displayed at the left
margin; this is usually taken from a window's hscroll member.
TAB_OFFSET is the number of columns of the first tab that aren't
window_width - 1
- (has_vertical_scroll_bars
- ? FRAME_SCROLL_BAR_COLS (XFRAME (window->frame))
- : (window_width + window_left != frame_width))
+ ? WINDOW_CONFIG_SCROLL_BAR_COLS (window)
+ : (window_width + window_left != frame_cols))
where
- window_width is XFASTINT (w->width),
- window_left is XFASTINT (w->left),
+ window_width is XFASTINT (w->total_cols),
+ window_left is XFASTINT (w->left_col),
has_vertical_scroll_bars is
- FRAME_HAS_VERTICAL_SCROLL_BARS (XFRAME (WINDOW_FRAME (window)))
- and frame_width = FRAME_WIDTH (XFRAME (window->frame))
+ WINDOW_HAS_VERTICAL_SCROLL_BAR (window)
+ and frame_cols = FRAME_COLS (XFRAME (window->frame))
- Or you can let window_internal_width do this all for you, and write:
- window_internal_width (w) - 1
+ Or you can let window_box_text_cols do this all for you, and write:
+ window_box_text_cols (w) - 1
The `-1' accounts for the continuation-line backslashes; the rest
accounts for window borders if the window is split horizontally, and
= (INTEGERP (current_buffer->selective_display)
? XINT (current_buffer->selective_display)
: !NILP (current_buffer->selective_display) ? -1 : 0);
- int prev_hpos = 0;
int selective_rlen
= (selective && dp && VECTORP (DISP_INVIS_VECTOR (dp))
? XVECTOR (DISP_INVIS_VECTOR (dp))->size : 0);
int wide_column_end_hpos = 0;
int prev_pos; /* Previous buffer position. */
int prev_pos_byte; /* Previous buffer position. */
+ int prev_hpos = 0;
+ int prev_vpos = 0;
int contin_hpos; /* HPOS of last column of continued line. */
int prev_tab_offset; /* Previous tab offset. */
+ int continuation_glyph_width;
XSETBUFFER (buffer, current_buffer);
XSETWINDOW (window, win);
if (tab_width <= 0 || tab_width > 1000)
tab_width = 8;
+ /* Negative width means use all available text columns. */
+ if (width < 0)
+ {
+ width = window_box_text_cols (win);
+ /* We must make room for continuation marks if we don't have fringes. */
+#ifdef HAVE_WINDOW_SYSTEM
+ if (!FRAME_WINDOW_P (XFRAME (win->frame)))
+#endif
+ width -= 1;
+ }
+
+ continuation_glyph_width = 1;
+#ifdef HAVE_WINDOW_SYSTEM
+ if (FRAME_WINDOW_P (XFRAME (win->frame)))
+ continuation_glyph_width = 0; /* In the fringe. */
+#endif
+
immediate_quit = 1;
QUIT;
int newpos;
/* Don't skip invisible if we are already at the margin. */
- if (vpos > tovpos || vpos == tovpos && hpos >= tohpos)
+ if (vpos > tovpos || (vpos == tovpos && hpos >= tohpos))
{
if (contin_hpos && prev_hpos == 0
&& hpos > tohpos
pos = prev_pos;
pos_byte = prev_pos_byte;
hpos = prev_hpos;
+ vpos = prev_vpos;
tab_offset = prev_tab_offset;
}
break;
W_ ^---- next after the point
^---- next char. after the point.
----------
- In case of wide-column character
+ In case of wide-column character
The problem here is continuation at a wide-column character.
In this case, the line may shorter less than WIDTH.
{
if (hscroll
|| (truncate_partial_width_windows
- && width + 1 < FRAME_WIDTH (XFRAME (WINDOW_FRAME (win))))
+ && ((width + continuation_glyph_width)
+ < FRAME_COLS (XFRAME (WINDOW_FRAME (win)))))
|| !NILP (current_buffer->truncate_lines))
{
/* Truncating: skip to newline, unless we are already past
if (pos >= next_boundary)
next_boundary = pos + 1;
prev_hpos = width;
+ prev_vpos = vpos;
prev_tab_offset = tab_offset;
}
}
vpos++;
contin_hpos = prev_hpos;
prev_hpos = 0;
+ prev_vpos = vpos;
}
}
pos = prev_pos;
pos_byte = prev_pos_byte;
hpos = prev_hpos;
+ vpos = prev_vpos;
tab_offset = prev_tab_offset;
/* NOTE on contin_hpos, hpos, and prev_hpos.
hpos = contin_hpos;
vpos = vpos - 1;
}
- else if (c == '\n')
- /* If previous character is NEWLINE,
- set VPOS back to previous line */
- vpos = vpos - 1;
break;
}
- if (vpos > tovpos || vpos == tovpos && hpos >= tohpos)
+ if (vpos > tovpos || (vpos == tovpos && hpos >= tohpos))
{
if (contin_hpos && prev_hpos == 0
&& hpos > tohpos
pos = prev_pos;
pos_byte = prev_pos_byte;
hpos = prev_hpos;
+ vpos = prev_vpos;
tab_offset = prev_tab_offset;
}
break;
break;
prev_hpos = hpos;
+ prev_vpos = vpos;
prev_pos = pos;
prev_pos_byte = pos_byte;
wide_column_end_hpos = 0;
/* We have to scan the text character-by-character. */
else
{
+ EMACS_INT i, n;
+ Lisp_Object charvec;
+
c = FETCH_BYTE (pos_byte);
/* Check composition sequence. */
if (dp != 0
&& ! (multibyte && BASE_LEADING_CODE_P (c))
&& VECTORP (DISP_CHAR_VECTOR (dp, c)))
- hpos += XVECTOR (DISP_CHAR_VECTOR (dp, c))->size;
- else if (c >= 040 && c < 0177)
- hpos++;
- else if (c == '\t')
{
- int tem = (hpos + tab_offset + hscroll - (hscroll > 0)) % tab_width;
- if (tem < 0)
- tem += tab_width;
- hpos += tab_width - tem;
+ charvec = DISP_CHAR_VECTOR (dp, c);
+ n = ASIZE (charvec);
+ }
+ else
+ {
+ charvec = Qnil;
+ n = 1;
}
- else if (c == '\n')
+
+ for (i = n - 1; i >= 0; --i)
{
- if (selective > 0
- && indented_beyond_p (pos, pos_byte, selective))
+ if (VECTORP (charvec))
{
- /* If (pos == to), we don't have to take care of
- selective display. */
- if (pos < to)
+ /* This should be handled the same as
+ next_element_from_display_vector does it. */
+ Lisp_Object entry = AREF (charvec, i);
+
+ if (INTEGERP (entry)
+ && GLYPH_CHAR_VALID_P (XFASTINT (entry)))
+ c = FAST_GLYPH_CHAR (XFASTINT (entry));
+ else
+ c = ' ';
+ }
+
+ if (c >= 040 && c < 0177)
+ hpos++;
+ else if (c == '\t')
+ {
+ int tem = ((hpos + tab_offset + hscroll - (hscroll > 0))
+ % tab_width);
+ if (tem < 0)
+ tem += tab_width;
+ hpos += tab_width - tem;
+ }
+ else if (c == '\n')
+ {
+ if (selective > 0
+ && indented_beyond_p (pos, pos_byte,
+ (double) selective)) /* iftc */
{
- /* Skip any number of invisible lines all at once */
- do
- {
- pos = find_before_next_newline (pos, to, 1);
- if (pos < to)
- pos++;
- pos_byte = CHAR_TO_BYTE (pos);
- }
- while (pos < to
- && indented_beyond_p (pos, pos_byte, selective));
- /* Allow for the " ..." that is displayed for them. */
- if (selective_rlen)
+ /* If (pos == to), we don't have to take care of
+ selective display. */
+ if (pos < to)
{
- hpos += selective_rlen;
- if (hpos >= width)
- hpos = width;
+ /* Skip any number of invisible lines all at once */
+ do
+ {
+ pos = find_before_next_newline (pos, to, 1);
+ if (pos < to)
+ pos++;
+ pos_byte = CHAR_TO_BYTE (pos);
+ }
+ while (pos < to
+ && indented_beyond_p (pos, pos_byte,
+ (double) selective)); /* iftc */
+ /* Allow for the " ..." that is displayed for them. */
+ if (selective_rlen)
+ {
+ hpos += selective_rlen;
+ if (hpos >= width)
+ hpos = width;
+ }
+ DEC_BOTH (pos, pos_byte);
+ /* We have skipped the invis text, but not the
+ newline after. */
}
- DEC_BOTH (pos, pos_byte);
- /* We have skipped the invis text, but not the
- newline after. */
}
+ else
+ {
+ /* A visible line. */
+ vpos++;
+ hpos = 0;
+ hpos -= hscroll;
+ /* Count the truncation glyph on column 0 */
+ if (hscroll > 0)
+ hpos += continuation_glyph_width;
+ tab_offset = 0;
+ }
+ contin_hpos = 0;
}
- else
+ else if (c == CR && selective < 0)
{
- /* A visible line. */
- vpos++;
- hpos = 0;
- hpos -= hscroll;
- /* Count the truncation glyph on column 0 */
- if (hscroll > 0)
- hpos++;
- tab_offset = 0;
- }
- contin_hpos = 0;
- }
- else if (c == CR && selective < 0)
- {
- /* In selective display mode,
- everything from a ^M to the end of the line is invisible.
- Stop *before* the real newline. */
- if (pos < to)
- {
- pos = find_before_next_newline (pos, to, 1);
- pos_byte = CHAR_TO_BYTE (pos);
+ /* In selective display mode,
+ everything from a ^M to the end of the line is invisible.
+ Stop *before* the real newline. */
+ if (pos < to)
+ {
+ pos = find_before_next_newline (pos, to, 1);
+ pos_byte = CHAR_TO_BYTE (pos);
+ }
+ /* If we just skipped next_boundary,
+ loop around in the main while
+ and handle it. */
+ if (pos > next_boundary)
+ next_boundary = pos;
+ /* Allow for the " ..." that is displayed for them. */
+ if (selective_rlen)
+ {
+ hpos += selective_rlen;
+ if (hpos >= width)
+ hpos = width;
+ }
}
- /* If we just skipped next_boundary,
- loop around in the main while
- and handle it. */
- if (pos > next_boundary)
- next_boundary = pos;
- /* Allow for the " ..." that is displayed for them. */
- if (selective_rlen)
+ else if (multibyte && BASE_LEADING_CODE_P (c))
{
- hpos += selective_rlen;
- if (hpos >= width)
- hpos = width;
+ /* Start of multi-byte form. */
+ unsigned char *ptr;
+ int bytes, width, wide_column;
+
+ pos_byte--; /* rewind POS_BYTE */
+ ptr = BYTE_POS_ADDR (pos_byte);
+ MULTIBYTE_BYTES_WIDTH (ptr, dp);
+ pos_byte += bytes;
+ if (wide_column)
+ wide_column_end_hpos = hpos + wide_column;
+ hpos += width;
}
+ else if (VECTORP (charvec))
+ ++hpos;
+ else
+ hpos += (ctl_arrow && c < 0200) ? 2 : 4;
}
- else if (multibyte && BASE_LEADING_CODE_P (c))
- {
- /* Start of multi-byte form. */
- unsigned char *ptr;
- int bytes, width, wide_column;
-
- pos_byte--; /* rewind POS_BYTE */
- ptr = BYTE_POS_ADDR (pos_byte);
- MULTIBYTE_BYTES_WIDTH (ptr, dp);
- pos_byte += bytes;
- if (wide_column)
- wide_column_end_hpos = hpos + wide_column;
- hpos += width;
- }
- else
- hpos += (ctl_arrow && c < 0200) ? 2 : 4;
}
}
}
-#if 0 /* The doc string is too long for some compilers,
- but make-docfile can find it in this comment. */
-DEFUN ("compute-motion", Ffoo, Sfoo, 7, 7, 0,
- "Scan through the current buffer, calculating screen position.\n\
-Scan the current buffer forward from offset FROM,\n\
-assuming it is at position FROMPOS--a cons of the form (HPOS . VPOS)--\n\
-to position TO or position TOPOS--another cons of the form (HPOS . VPOS)--\n\
-and return the ending buffer position and screen location.\n\
-\n\
-There are three additional arguments:\n\
-\n\
-WIDTH is the number of columns available to display text;\n\
-this affects handling of continuation lines.\n\
-This is usually the value returned by `window-width', less one (to allow\n\
-for the continuation glyph).\n\
-\n\
-OFFSETS is either nil or a cons cell (HSCROLL . TAB-OFFSET).\n\
-HSCROLL is the number of columns not being displayed at the left\n\
-margin; this is usually taken from a window's hscroll member.\n\
-TAB-OFFSET is the number of columns of the first tab that aren't\n\
-being displayed, perhaps because the line was continued within it.\n\
-If OFFSETS is nil, HSCROLL and TAB-OFFSET are assumed to be zero.\n\
-\n\
-WINDOW is the window to operate on. It is used to choose the display table;\n\
-if it is showing the current buffer, it is used also for\n\
-deciding which overlay properties apply.\n\
-Note that `compute-motion' always operates on the current buffer.\n\
-\n\
-The value is a list of five elements:\n\
- (POS HPOS VPOS PREVHPOS CONTIN)\n\
-POS is the buffer position where the scan stopped.\n\
-VPOS is the vertical position where the scan stopped.\n\
-HPOS is the horizontal position where the scan stopped.\n\
-\n\
-PREVHPOS is the horizontal position one character back from POS.\n\
-CONTIN is t if a line was continued after (or within) the previous character.\n\
-\n\
-For example, to find the buffer position of column COL of line LINE\n\
-of a certain window, pass the window's starting location as FROM\n\
-and the window's upper-left coordinates as FROMPOS.\n\
-Pass the buffer's (point-max) as TO, to limit the scan to the end of the\n\
-visible section of the buffer, and pass LINE and COL as TOPOS.")
- (from, frompos, to, topos, width, offsets, window)
-#endif
-
DEFUN ("compute-motion", Fcompute_motion, Scompute_motion, 7, 7, 0,
- 0)
- (from, frompos, to, topos, width, offsets, window)
+ doc: /* Scan through the current buffer, calculating screen position.
+Scan the current buffer forward from offset FROM,
+assuming it is at position FROMPOS--a cons of the form (HPOS . VPOS)--
+to position TO or position TOPOS--another cons of the form (HPOS . VPOS)--
+and return the ending buffer position and screen location.
+
+If TOPOS is nil, the actual width and height of the window's
+text area are used.
+
+There are three additional arguments:
+
+WIDTH is the number of columns available to display text;
+this affects handling of continuation lines. A value of nil
+corresponds to the actual number of available text columns.
+
+OFFSETS is either nil or a cons cell (HSCROLL . TAB-OFFSET).
+HSCROLL is the number of columns not being displayed at the left
+margin; this is usually taken from a window's hscroll member.
+TAB-OFFSET is the number of columns of the first tab that aren't
+being displayed, perhaps because the line was continued within it.
+If OFFSETS is nil, HSCROLL and TAB-OFFSET are assumed to be zero.
+
+WINDOW is the window to operate on. It is used to choose the display table;
+if it is showing the current buffer, it is used also for
+deciding which overlay properties apply.
+Note that `compute-motion' always operates on the current buffer.
+
+The value is a list of five elements:
+ (POS HPOS VPOS PREVHPOS CONTIN)
+POS is the buffer position where the scan stopped.
+VPOS is the vertical position where the scan stopped.
+HPOS is the horizontal position where the scan stopped.
+
+PREVHPOS is the horizontal position one character back from POS.
+CONTIN is t if a line was continued after (or within) the previous character.
+
+For example, to find the buffer position of column COL of line LINE
+of a certain window, pass the window's starting location as FROM
+and the window's upper-left coordinates as FROMPOS.
+Pass the buffer's (point-max) as TO, to limit the scan to the end of the
+visible section of the buffer, and pass LINE and COL as TOPOS. */)
+ (from, frompos, to, topos, width, offsets, window)
Lisp_Object from, frompos, to, topos;
Lisp_Object width, offsets, window;
{
- Lisp_Object bufpos, hpos, vpos, prevhpos, contin;
+ struct window *w;
+ Lisp_Object bufpos, hpos, vpos, prevhpos;
struct position *pos;
int hscroll, tab_offset;
- CHECK_NUMBER_COERCE_MARKER (from, 0);
- CHECK_CONS (frompos, 0);
- CHECK_NUMBER (XCAR (frompos), 0);
- CHECK_NUMBER (XCDR (frompos), 0);
- CHECK_NUMBER_COERCE_MARKER (to, 0);
- CHECK_CONS (topos, 0);
- CHECK_NUMBER (XCAR (topos), 0);
- CHECK_NUMBER (XCDR (topos), 0);
- CHECK_NUMBER (width, 0);
+ CHECK_NUMBER_COERCE_MARKER (from);
+ CHECK_CONS (frompos);
+ CHECK_NUMBER_CAR (frompos);
+ CHECK_NUMBER_CDR (frompos);
+ CHECK_NUMBER_COERCE_MARKER (to);
+ if (!NILP (topos))
+ {
+ CHECK_CONS (topos);
+ CHECK_NUMBER_CAR (topos);
+ CHECK_NUMBER_CDR (topos);
+ }
+ if (!NILP (width))
+ CHECK_NUMBER (width);
+
if (!NILP (offsets))
{
- CHECK_CONS (offsets, 0);
- CHECK_NUMBER (XCAR (offsets), 0);
- CHECK_NUMBER (XCDR (offsets), 0);
+ CHECK_CONS (offsets);
+ CHECK_NUMBER_CAR (offsets);
+ CHECK_NUMBER_CDR (offsets);
hscroll = XINT (XCAR (offsets));
tab_offset = XINT (XCDR (offsets));
}
if (NILP (window))
window = Fselected_window ();
else
- CHECK_LIVE_WINDOW (window, 0);
+ CHECK_LIVE_WINDOW (window);
+ w = XWINDOW (window);
if (XINT (from) < BEGV || XINT (from) > ZV)
args_out_of_range_3 (from, make_number (BEGV), make_number (ZV));
pos = compute_motion (XINT (from), XINT (XCDR (frompos)),
XINT (XCAR (frompos)), 0,
- XINT (to), XINT (XCDR (topos)),
- XINT (XCAR (topos)),
- XINT (width), hscroll, tab_offset,
+ XINT (to),
+ (NILP (topos)
+ ? window_internal_height (w)
+ : XINT (XCDR (topos))),
+ (NILP (topos)
+ ? (window_box_text_cols (w)
+ - (
+#ifdef HAVE_WINDOW_SYSTEM
+ FRAME_WINDOW_P (XFRAME (w->frame)) ? 0 :
+#endif
+ 1))
+ : XINT (XCAR (topos))),
+ (NILP (width) ? -1 : XINT (width)),
+ hscroll, tab_offset,
XWINDOW (window));
XSETFASTINT (bufpos, pos->bufpos);
}
\f
/* Fvertical_motion and vmotion */
+
struct position val_vmotion;
struct position *
register int from, vtarget;
struct window *w;
{
- int width = window_internal_width (w) - 1;
int hscroll = XINT (w->hscroll);
struct position pos;
/* vpos is cumulative vertical position, changed as from is changed */
register int vpos = 0;
- Lisp_Object prevline;
+ int prevline;
register int first;
int from_byte;
int lmargin = hscroll > 0 ? 1 - hscroll : 0;
{
Lisp_Object propval;
- XSETFASTINT (prevline, find_next_newline_no_quit (from - 1, -1));
- while (XFASTINT (prevline) > BEGV
+ prevline = find_next_newline_no_quit (from - 1, -1);
+ while (prevline > BEGV
&& ((selective > 0
- && indented_beyond_p (XFASTINT (prevline),
- CHAR_TO_BYTE (XFASTINT (prevline)),
- selective))
- /* watch out for newlines with `invisible' property */
- || (propval = Fget_char_property (prevline,
+ && indented_beyond_p (prevline,
+ CHAR_TO_BYTE (prevline),
+ (double) selective)) /* iftc */
+ /* Watch out for newlines with `invisible' property.
+ When moving upward, check the newline before. */
+ || (propval = Fget_char_property (make_number (prevline - 1),
Qinvisible,
text_prop_object),
TEXT_PROP_MEANS_INVISIBLE (propval))))
- XSETFASTINT (prevline,
- find_next_newline_no_quit (XFASTINT (prevline) - 1,
- -1));
- pos = *compute_motion (XFASTINT (prevline), 0,
- lmargin + (XFASTINT (prevline) == BEG
- ? start_hpos : 0),
+ prevline = find_next_newline_no_quit (prevline - 1, -1);
+ pos = *compute_motion (prevline, 0,
+ lmargin + (prevline == BEG ? start_hpos : 0),
0,
- from,
+ from,
/* Don't care for VPOS... */
1 << (BITS_PER_SHORT - 1),
/* ... nor HPOS. */
1 << (BITS_PER_SHORT - 1),
- width, hscroll,
+ -1, hscroll,
/* This compensates for start_hpos
so that a tab as first character
still occupies 8 columns. */
- (XFASTINT (prevline) == BEG
- ? -start_hpos : 0),
+ (prevline == BEG ? -start_hpos : 0),
w);
vpos -= pos.vpos;
first = 0;
- from = XFASTINT (prevline);
+ from = prevline;
}
/* If we made exactly the desired vertical distance,
{
Lisp_Object propval;
- XSETFASTINT (prevline, find_next_newline_no_quit (from, -1));
- while (XFASTINT (prevline) > BEGV
+ prevline = find_next_newline_no_quit (from, -1);
+ while (prevline > BEGV
&& ((selective > 0
- && indented_beyond_p (XFASTINT (prevline),
- CHAR_TO_BYTE (XFASTINT (prevline)),
- selective))
- /* watch out for newlines with `invisible' property */
- || (propval = Fget_char_property (prevline, Qinvisible,
+ && indented_beyond_p (prevline,
+ CHAR_TO_BYTE (prevline),
+ (double) selective)) /* iftc */
+ /* Watch out for newlines with `invisible' property.
+ When moving downward, check the newline after. */
+ || (propval = Fget_char_property (make_number (prevline),
+ Qinvisible,
text_prop_object),
TEXT_PROP_MEANS_INVISIBLE (propval))))
- XSETFASTINT (prevline,
- find_next_newline_no_quit (XFASTINT (prevline) - 1,
- -1));
- pos = *compute_motion (XFASTINT (prevline), 0,
- lmargin + (XFASTINT (prevline) == BEG
+ prevline = find_next_newline_no_quit (prevline - 1, -1);
+ pos = *compute_motion (prevline, 0,
+ lmargin + (prevline == BEG
? start_hpos : 0),
0,
- from,
+ from,
/* Don't care for VPOS... */
1 << (BITS_PER_SHORT - 1),
/* ... nor HPOS. */
1 << (BITS_PER_SHORT - 1),
- width, hscroll,
- (XFASTINT (prevline) == BEG ? -start_hpos : 0),
+ -1, hscroll,
+ (prevline == BEG ? -start_hpos : 0),
w);
did_motion = 1;
}
}
return compute_motion (from, vpos, pos.hpos, did_motion,
ZV, vtarget, - (1 << (BITS_PER_SHORT - 1)),
- width, hscroll,
+ -1, hscroll,
pos.tab_offset - (from == BEG ? start_hpos : 0),
w);
}
DEFUN ("vertical-motion", Fvertical_motion, Svertical_motion, 1, 2, 0,
- "Move point to start of the screen line LINES lines down.\n\
-If LINES is negative, this means moving up.\n\
-\n\
-This function is an ordinary cursor motion function\n\
-which calculates the new position based on how text would be displayed.\n\
-The new position may be the start of a line,\n\
-or just the start of a continuation line.\n\
-The function returns number of screen lines moved over;\n\
-that usually equals LINES, but may be closer to zero\n\
-if beginning or end of buffer was reached.\n\
-\n\
-The optional second argument WINDOW specifies the window to use for\n\
-parameters such as width, horizontal scrolling, and so on.\n\
-The default is to use the selected window's parameters.\n\
-\n\
-`vertical-motion' always uses the current buffer,\n\
-regardless of which buffer is displayed in WINDOW.\n\
-This is consistent with other cursor motion functions\n\
-and makes it possible to use `vertical-motion' in any buffer,\n\
-whether or not it is currently displayed in some window.")
- (lines, window)
+ doc: /* Move point to start of the screen line LINES lines down.
+If LINES is negative, this means moving up.
+
+This function is an ordinary cursor motion function
+which calculates the new position based on how text would be displayed.
+The new position may be the start of a line,
+or just the start of a continuation line.
+The function returns number of screen lines moved over;
+that usually equals LINES, but may be closer to zero
+if beginning or end of buffer was reached.
+
+The optional second argument WINDOW specifies the window to use for
+parameters such as width, horizontal scrolling, and so on.
+The default is to use the selected window's parameters.
+
+`vertical-motion' always uses the current buffer,
+regardless of which buffer is displayed in WINDOW.
+This is consistent with other cursor motion functions
+and makes it possible to use `vertical-motion' in any buffer,
+whether or not it is currently displayed in some window. */)
+ (lines, window)
Lisp_Object lines, window;
{
struct it it;
Lisp_Object old_buffer;
struct gcpro gcpro1;
- CHECK_NUMBER (lines, 0);
+ CHECK_NUMBER (lines);
if (! NILP (window))
- CHECK_WINDOW (window, 0);
+ CHECK_WINDOW (window);
else
window = selected_window;
w = XWINDOW (window);
old_buffer = w->buffer;
XSETBUFFER (w->buffer, current_buffer);
}
-
- SET_TEXT_POS (pt, PT, PT_BYTE);
- start_display (&it, w, pt);
- move_it_by_lines (&it, XINT (lines), 0);
- SET_PT_BOTH (IT_CHARPOS (it), IT_BYTEPOS (it));
+
+ if (noninteractive)
+ {
+ struct position pos;
+ pos = *vmotion (PT, XINT (lines), w);
+ SET_PT_BOTH (pos.bufpos, pos.bytepos);
+ }
+ else
+ {
+ int it_start;
+ int oselective;
+ int start_on_image_or_stretch_p;
+
+ SET_TEXT_POS (pt, PT, PT_BYTE);
+ start_display (&it, w, pt);
+
+ /* Scan from the start of the line containing PT. If we don't
+ do this, we start moving with IT->current_x == 0, while PT is
+ really at some x > 0. The effect is, in continuation lines, that
+ we end up with the iterator placed at where it thinks X is 0,
+ while the end position is really at some X > 0, the same X that
+ PT had. */
+ it_start = IT_CHARPOS (it);
+ start_on_image_or_stretch_p = (it.method == GET_FROM_IMAGE
+ || it.method == GET_FROM_STRETCH);
+ reseat_at_previous_visible_line_start (&it);
+ it.current_x = it.hpos = 0;
+ /* Temporarily disable selective display so we don't move too far */
+ oselective = it.selective;
+ it.selective = 0;
+ move_it_to (&it, PT, -1, -1, -1, MOVE_TO_POS);
+ it.selective = oselective;
+
+ /* Move back if we got too far. This may happen if
+ truncate-lines is on and PT is beyond right margin.
+ It may also happen if it_start is on an image or a stretch
+ glyph -- in that case, don't go back. */
+ if (IT_CHARPOS (it) > it_start && XINT (lines) > 0
+ && !start_on_image_or_stretch_p)
+ move_it_by_lines (&it, -1, 0);
+
+ it.vpos = 0;
+ /* Do this even if LINES is 0, so that we move back
+ to the beginning of the current line as we ought. */
+ if (XINT (lines) >= 0 || IT_CHARPOS (it) > 0)
+ move_it_by_lines (&it, XINT (lines), 0);
+
+ SET_PT_BOTH (IT_CHARPOS (it), IT_BYTEPOS (it));
+ }
if (BUFFERP (old_buffer))
w->buffer = old_buffer;
-
+
RETURN_UNGCPRO (make_number (it.vpos));
}
\f
-/* file's initialization. */
+/* File's initialization. */
void
syms_of_indent ()
{
DEFVAR_BOOL ("indent-tabs-mode", &indent_tabs_mode,
- "*Indentation can insert tabs if this is non-nil.\n\
-Setting this variable automatically makes it local to the current buffer.");
+ doc: /* *Indentation can insert tabs if this is non-nil.
+Setting this variable automatically makes it local to the current buffer. */);
indent_tabs_mode = 1;
defsubr (&Scurrent_indentation);
defsubr (&Svertical_motion);
defsubr (&Scompute_motion);
}
+
+/* arch-tag: 9adfea44-71f7-4988-8ee3-96da15c502cc
+ (do not change this comment) */