/* Indentation functions.
- Copyright (C) 1985-1988, 1993-1995, 1998, 2000-2015 Free Software
+ Copyright (C) 1985-1988, 1993-1995, 1998, 2000-2016 Free Software
Foundation, Inc.
This file is part of GNU Emacs.
GNU Emacs is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
+the Free Software Foundation, either version 3 of the License, or (at
+your option) any later version.
GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
#include "category.h"
#include "composite.h"
#include "indent.h"
-#include "keyboard.h"
#include "frame.h"
#include "window.h"
-#include "termchar.h"
#include "disptab.h"
#include "intervals.h"
#include "dispextern.h"
: MOST_POSITIVE_FIXNUM);
if ((prop = Fplist_get (plist, QCwidth),
- RANGED_INTEGERP (0, prop, INT_MAX)))
+ RANGED_INTEGERP (0, prop, INT_MAX))
+ || (prop = Fplist_get (plist, QCrelative_width),
+ RANGED_INTEGERP (0, prop, INT_MAX)))
width = XINT (prop);
else if (FLOATP (prop) && 0 <= XFLOAT_DATA (prop)
&& XFLOAT_DATA (prop) <= INT_MAX)
*endpos = OVERLAY_POSITION (OVERLAY_END (overlay));
else
get_property_and_range (pos, Qdisplay, &val, &start, endpos, Qnil);
+
+ /* For :relative-width, we need to multiply by the column
+ width of the character at POS, if it is greater than 1. */
+ if (!NILP (Fplist_get (plist, QCrelative_width))
+ && !NILP (BVAR (current_buffer, enable_multibyte_characters)))
+ {
+ int b, wd;
+ unsigned char *p = BYTE_POS_ADDR (CHAR_TO_BYTE (pos));
+
+ MULTIBYTE_BYTES_WIDTH (p, buffer_display_table (), b, wd);
+ width *= wd;
+ }
return width;
}
}
struct window *w;
Lisp_Object old_buffer;
EMACS_INT old_charpos IF_LINT (= 0), old_bytepos IF_LINT (= 0);
- struct gcpro gcpro1;
Lisp_Object lcols;
void *itdata = NULL;
w = decode_live_window (window);
old_buffer = Qnil;
- GCPRO1 (old_buffer);
if (XBUFFER (w->contents) != current_buffer)
{
/* Set the window's buffer temporarily to the current buffer. */
bool disp_string_at_start_p = 0;
ptrdiff_t nlines = XINT (lines);
int vpos_init = 0;
- double start_col;
+ double start_col IF_LINT (= 0);
int start_x IF_LINT (= 0);
int to_x = -1;
&& it.method == GET_FROM_BUFFER
&& it.c == '\n')
it_overshoot_count = 1;
+ else if (it_overshoot_count == 1 && it.vpos == 0
+ && it.current_x < it.last_visible_x)
+ {
+ /* If we came to the same screen line as the one where
+ we started, we didn't overshoot the line, and won't
+ need to backtrack after all. This happens, for
+ example, when PT is in the middle of a composition. */
+ it_overshoot_count = 0;
+ }
else if (disp_string_at_start_p && it.vpos > 0)
{
/* This is the case of a display string that spans
screen lines we need to backtrack. */
it_overshoot_count = it.vpos;
}
+ /* We will overshoot if lines are truncated and point lies
+ beyond the right margin of the window. */
+ if (it.line_wrap == TRUNCATE && it.current_x >= it.last_visible_x
+ && it_overshoot_count == 0)
+ it_overshoot_count = 1;
if (it_overshoot_count > 0)
move_it_by_lines (&it, -it_overshoot_count);
overshoot_handled = 1;
}
else if (IT_CHARPOS (it) == PT - 1
- && FETCH_BYTE (PT - 1) == '\n'
- && nlines < 0)
+ && FETCH_BYTE (PT_BYTE - 1) == '\n'
+ && nlines <= 0)
{
/* The position we started from was covered by a display
property, so we moved to position before the string, and
- backed up one line, because the character at PT - 1 is a
- newline. So we need one less line to go up. */
+ backed up one line, because the character at PT - 1 is
+ a newline. So we need one less line to go up (or exactly
+ one line to go down if nlines == 0). */
nlines++;
/* But we still need to record that one line, in order to
return the correct value to the caller. */
vpos_init = -1;
+
+ overshoot_handled = 1;
}
if (lcols_given)
to_x = window_column_x (w, window, extract_float (lcols), lcols);
}
else if (overshoot_handled)
{
- it.vpos = 0;
+ it.vpos = vpos_init;
move_it_by_lines (&it, min (PTRDIFF_MAX, nlines));
}
else
was originally hscrolled, the goal column is interpreted as
an addition to the hscroll amount. */
if (lcols_given)
- move_it_in_display_line (&it, ZV, first_x + to_x, MOVE_TO_X);
+ {
+ move_it_in_display_line (&it, ZV, first_x + to_x, MOVE_TO_X);
+ /* If we find ourselves in the middle of an overlay string
+ which includes a newline after current string position,
+ we need to move by lines until we get out of the string,
+ and then reposition point at the requested X coordinate;
+ if we don't, the cursor will be placed just after the
+ string, which might not be the requested column. */
+ if (nlines > 0 && it.area == TEXT_AREA)
+ {
+ while (it.method == GET_FROM_STRING
+ && !it.string_from_display_prop_p
+ && memchr (SSDATA (it.string) + IT_STRING_BYTEPOS (it),
+ '\n',
+ SBYTES (it.string) - IT_STRING_BYTEPOS (it)))
+ {
+ move_it_by_lines (&it, 1);
+ move_it_in_display_line (&it, ZV, first_x + to_x, MOVE_TO_X);
+ }
+ }
+ }
SET_PT_BOTH (IT_CHARPOS (it), IT_BYTEPOS (it));
bidi_unshelve_cache (itdata, 0);
old_charpos, old_bytepos);
}
- RETURN_UNGCPRO (make_number (it.vpos));
+ return make_number (it.vpos);
}