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Amiga Games Extra 1996 September
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Amiga Games Extra CD-ROM 9-1996.iso
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userbox
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publicdomain
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vim-4.2
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src
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screen.c
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1996-06-17
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/* vi:set ts=4 sw=4:
*
* VIM - Vi IMproved by Bram Moolenaar
*
* Do ":help uganda" in Vim to read copying and usage conditions.
* Do ":help credits" in Vim to see a list of people who contributed.
*/
/*
* screen.c: code for displaying on the screen
*/
#include "vim.h"
#include "globals.h"
#include "proto.h"
#include "option.h"
#include "ops.h" /* For op_inclusive */
char *tgoto __PARMS((char *cm, int col, int line));
static int canopt; /* TRUE when cursor goto can be optimized */
static int attributes = 0; /* current attributes for screen character*/
static int highlight_attr = 0; /* attributes when highlighting on */
#ifdef RIGHTLEFT
static int rightleft = 0; /* set to 1 for right to left in screen_fill */
#endif
static int win_line __ARGS((WIN *, linenr_t, int, int));
static void comp_Botline_sub __ARGS((WIN *wp, linenr_t lnum, int done));
static void screen_char __ARGS((char_u *, int, int));
static void screenclear2 __ARGS((void));
static void lineclear __ARGS((char_u *p));
static int screen_ins_lines __ARGS((int, int, int, int));
/*
* updateline() - like updateScreen() but only for cursor line
*
* Check if the size of the cursor line has changed. If it did change, lines
* below the cursor will move up or down and we need to call the routine
* updateScreen() to examine the entire screen.
*/
void
updateline()
{
int row;
int n;
if (!screen_valid(TRUE))
return;
if (must_redraw) /* must redraw whole screen */
{
updateScreen(must_redraw);
return;
}
if (RedrawingDisabled)
{
must_redraw = NOT_VALID; /* remember to update later */
return;
}
cursor_off();
(void)set_highlight('v');
row = win_line(curwin, curwin->w_cursor.lnum,
curwin->w_cline_row, curwin->w_height);
if (row == curwin->w_height + 1) /* line too long for window */
{
/* window needs to be scrolled up to show the cursor line */
if (curwin->w_topline < curwin->w_cursor.lnum)
++curwin->w_topline;
updateScreen(VALID_TO_CURSCHAR);
cursupdate();
}
else if (!dollar_vcol)
{
n = row - curwin->w_cline_row;
if (n != curwin->w_cline_height) /* line changed size */
{
if (n < curwin->w_cline_height) /* got smaller: delete lines */
win_del_lines(curwin, row,
curwin->w_cline_height - n, FALSE, TRUE);
else /* got bigger: insert lines */
win_ins_lines(curwin,
curwin->w_cline_row + curwin->w_cline_height,
n - curwin->w_cline_height, FALSE, TRUE);
updateScreen(VALID_TO_CURSCHAR);
}
else if (clear_cmdline || redraw_cmdline)
showmode(); /* clear cmdline, show mode and ruler */
}
}
/*
* update all windows that are editing the current buffer
*/
void
update_curbuf(type)
int type;
{
WIN *wp;
for (wp = firstwin; wp; wp = wp->w_next)
if (wp->w_buffer == curbuf && wp->w_redr_type < type)
wp->w_redr_type = type;
updateScreen(type);
}
/*
* updateScreen()
*
* Based on the current value of curwin->w_topline, transfer a screenfull
* of stuff from Filemem to NextScreen, and update curwin->w_botline.
*/
void
updateScreen(type)
int type;
{
WIN *wp;
if (!screen_valid(TRUE))
return;
dollar_vcol = 0;
if (must_redraw)
{
if (type < must_redraw) /* use maximal type */
type = must_redraw;
must_redraw = 0;
}
if (type == CURSUPD) /* update cursor and then redraw NOT_VALID */
{
curwin->w_lsize_valid = 0;
cursupdate(); /* will call updateScreen() */
return;
}
if (curwin->w_lsize_valid == 0 && type < NOT_VALID)
type = NOT_VALID;
if (RedrawingDisabled)
{
must_redraw = type; /* remember type for next time */
curwin->w_redr_type = type;
curwin->w_lsize_valid = 0; /* don't use w_lsize[] now */
return;
}
/*
* if the screen was scrolled up when displaying a message, scroll it down
*/
if (msg_scrolled)
{
clear_cmdline = TRUE;
if (msg_scrolled > Rows - 5) /* clearing is faster */
type = CLEAR;
else if (type != CLEAR)
{
if (screen_ins_lines(0, 0, msg_scrolled, (int)Rows) == FAIL)
type = CLEAR;
win_rest_invalid(firstwin); /* should do only first/last few */
}
msg_scrolled = 0;
need_wait_return = FALSE;
}
/*
* reset cmdline_row now (may have been changed temporarily)
*/
compute_cmdrow();
if (type == CLEAR) /* first clear screen */
{
screenclear(); /* will reset clear_cmdline */
type = NOT_VALID;
}
if (clear_cmdline) /* first clear cmdline */
{
if (emsg_on_display)
{
mch_delay(1000L, TRUE);
emsg_on_display = FALSE;
}
msg_row = cmdline_row;
msg_col = 0;
msg_clr_eos(); /* will reset clear_cmdline */
}
/* return if there is nothing to do */
if (!((type == VALID && curwin->w_topline == curwin->w_lsize_lnum[0]) ||
(type == INVERTED &&
curwin->w_old_cursor_lnum == curwin->w_cursor.lnum &&
curwin->w_old_cursor_vcol == curwin->w_virtcol &&
curwin->w_old_curswant == curwin->w_curswant)))
{
/*
* go from top to bottom through the windows, redrawing the ones that
* need it
*/
curwin->w_redr_type = type;
cursor_off();
for (wp = firstwin; wp; wp = wp->w_next)
{
if (wp->w_redr_type)
win_update(wp);
if (wp->w_redr_status)
win_redr_status(wp);
}
}
if (redraw_cmdline)
showmode();
}
#ifdef USE_GUI
/*
* Update a single window, its status line and maybe the command line msg.
* Used for the GUI scrollbar.
*/
void
updateWindow(wp)
WIN *wp;
{
win_update(wp);
if (wp->w_redr_status)
win_redr_status(wp);
if (redraw_cmdline)
showmode();
}
#endif
/*
* update a single window
*
* This may cause the windows below it also to be redrawn
*/
void
win_update(wp)
WIN *wp;
{
int type = wp->w_redr_type;
register int row;
register int endrow;
linenr_t lnum;
linenr_t lastline = 0; /* only valid if endrow != Rows -1 */
int done; /* if TRUE, we hit the end of the file */
int didline; /* if TRUE, we finished the last line */
int srow = 0; /* starting row of the current line */
int idx;
int i;
long j;
if (type == NOT_VALID)
{
wp->w_redr_status = TRUE;
wp->w_lsize_valid = 0;
}
idx = 0;
row = 0;
lnum = wp->w_topline;
/* The number of rows shown is w_height. */
/* The default last row is the status/command line. */
endrow = wp->w_height;
if (type == VALID || type == VALID_TO_CURSCHAR)
{
/*
* We handle two special cases:
* 1: we are off the top of the screen by a few lines: scroll down
* 2: wp->w_topline is below wp->w_lsize_lnum[0]: may scroll up
*/
if (wp->w_topline < wp->w_lsize_lnum[0]) /* may scroll down */
{
j = wp->w_lsize_lnum[0] - wp->w_topline;
if (j < wp->w_height - 2) /* not too far off */
{
lastline = wp->w_lsize_lnum[0] - 1;
i = plines_m_win(wp, wp->w_topline, lastline);
if (i < wp->w_height - 2) /* less than a screen off */
{
/*
* Try to insert the correct number of lines.
* If not the last window, delete the lines at the bottom.
* win_ins_lines may fail.
*/
if (win_ins_lines(wp, 0, i, FALSE, wp == firstwin) == OK &&
wp->w_lsize_valid)
{
endrow = i;
if ((wp->w_lsize_valid += j) > wp->w_height)
wp->w_lsize_valid = wp->w_height;
for (idx = wp->w_lsize_valid; idx - j >= 0; idx--)
{
wp->w_lsize_lnum[idx] = wp->w_lsize_lnum[idx - j];
wp->w_lsize[idx] = wp->w_lsize[idx - j];
}
idx = 0;
}
}
else if (lastwin == firstwin)
screenclear(); /* far off: clearing the screen is faster */
}
else if (lastwin == firstwin)
screenclear(); /* far off: clearing the screen is faster */
}
else /* may scroll up */
{
j = -1;
/* try to find wp->w_topline in wp->w_lsize_lnum[] */
for (i = 0; i < wp->w_lsize_valid; i++)
{
if (wp->w_lsize_lnum[i] == wp->w_topline)
{
j = i;
break;
}
row += wp->w_lsize[i];
}
if (j == -1) /* wp->w_topline is not in wp->w_lsize_lnum */
{
row = 0;
if (lastwin == firstwin)
screenclear(); /* far off: clearing the screen is faster */
}
else
{
/*
* Try to delete the correct number of lines.
* wp->w_topline is at wp->w_lsize_lnum[i].
*/
if ((row == 0 || win_del_lines(wp, 0, row,
FALSE, wp == firstwin) == OK) && wp->w_lsize_valid)
{
srow = row;
row = 0;
for (;;)
{
if (type == VALID_TO_CURSCHAR &&
lnum == wp->w_cursor.lnum)
break;
if (row + srow + (int)wp->w_lsize[j] >= wp->w_height)
break;
wp->w_lsize[idx] = wp->w_lsize[j];
wp->w_lsize_lnum[idx] = lnum++;
row += wp->w_lsize[idx++];
if ((int)++j >= wp->w_lsize_valid)
break;
}
wp->w_lsize_valid = idx;
}
else
row = 0; /* update all lines */
}
}
if (endrow == wp->w_height && idx == 0) /* no scrolling */
wp->w_lsize_valid = 0;
}
done = didline = FALSE;
if (VIsual_active) /* check if we are updating the inverted part */
{
linenr_t from, to;
/* find the line numbers that need to be updated */
if (curwin->w_cursor.lnum < wp->w_old_cursor_lnum)
{
from = curwin->w_cursor.lnum;
to = wp->w_old_cursor_lnum;
}
else
{
from = wp->w_old_cursor_lnum;
to = curwin->w_cursor.lnum;
}
/* if VIsual changed, update the maximal area */
if (VIsual.lnum != wp->w_old_visual_lnum)
{
if (wp->w_old_visual_lnum < from)
from = wp->w_old_visual_lnum;
if (wp->w_old_visual_lnum > to)
to = wp->w_old_visual_lnum;
if (VIsual.lnum < from)
from = VIsual.lnum;
if (VIsual.lnum > to)
to = VIsual.lnum;
}
/* if in block mode and changed column or wp->w_curswant: update all
* lines */
if (VIsual_mode == Ctrl('V') &&
(curwin->w_virtcol != wp->w_old_cursor_vcol ||
wp->w_curswant != wp->w_old_curswant))
{
if (from > VIsual.lnum)
from = VIsual.lnum;
if (to < VIsual.lnum)
to = VIsual.lnum;
}
if (from < wp->w_topline)
from = wp->w_topline;
if (from >= wp->w_botline)
from = wp->w_botline - 1;
if (to >= wp->w_botline)
to = wp->w_botline - 1;
/* find the minimal part to be updated */
if (type == INVERTED)
{
while (lnum < from) /* find start */
{
row += wp->w_lsize[idx++];
++lnum;
}
srow = row;
for (j = idx; j < wp->w_lsize_valid; ++j) /* find end */
{
if (wp->w_lsize_lnum[j] == to + 1)
{
endrow = srow;
break;
}
srow += wp->w_lsize[j];
}
}
/* if we update the lines between from and to set old_cursor */
if (type == INVERTED || (lnum <= from &&
(endrow == wp->w_height || lastline >= to)))
{
wp->w_old_cursor_lnum = curwin->w_cursor.lnum;
wp->w_old_cursor_vcol = curwin->w_virtcol;
wp->w_old_visual_lnum = VIsual.lnum;
wp->w_old_curswant = wp->w_curswant;
}
}
else
{
wp->w_old_cursor_lnum = 0;
wp->w_old_visual_lnum = 0;
}
(void)set_highlight('v');
/*
* Update the screen rows from "row" to "endrow".
* Start at line "lnum" which is at wp->w_lsize_lnum[idx].
*/
for (;;)
{
if (lnum > wp->w_buffer->b_ml.ml_line_count)
{
done = TRUE; /* hit the end of the file */
break;
}
srow = row;
row = win_line(wp, lnum, srow, endrow);
if (row > endrow) /* past end of screen */
{ /* we may need the size of that */
wp->w_lsize[idx] = plines_win(wp, lnum);
wp->w_lsize_lnum[idx++] = lnum; /* too long line later on */
break;
}
wp->w_lsize[idx] = row - srow;
wp->w_lsize_lnum[idx++] = lnum;
if (++lnum > wp->w_buffer->b_ml.ml_line_count)
{
done = TRUE;
break;
}
if (row == endrow)
{
didline = TRUE;
break;
}
}
if (idx > wp->w_lsize_valid)
wp->w_lsize_valid = idx;
/* Do we have to do off the top of the screen processing ? */
if (endrow != wp->w_height)
{
row = 0;
for (idx = 0; idx < wp->w_lsize_valid && row < wp->w_height; idx++)
row += wp->w_lsize[idx];
if (row < wp->w_height)
{
done = TRUE;
}
else if (row > wp->w_height) /* Need to blank out the last line */
{
lnum = wp->w_lsize_lnum[idx - 1];
srow = row - wp->w_lsize[idx - 1];
didline = FALSE;
}
else
{
lnum = wp->w_lsize_lnum[idx - 1] + 1;
didline = TRUE;
}
}
wp->w_empty_rows = 0;
/*
* If we didn't hit the end of the file, and we didn't finish the last
* line we were working on, then the line didn't fit.
*/
if (!done && !didline)
{
if (lnum == wp->w_topline)
{
/*
* Single line that does not fit!
* Fill last line with '@' characters.
*/
screen_fill(wp->w_winpos + wp->w_height - 1,
wp->w_winpos + wp->w_height, 0, (int)Columns, '@', '@');
wp->w_botline = lnum + 1;
}
else
{
/*
* Clear the rest of the screen and mark the unused lines.
*/
#ifdef RIGHTLEFT
if (wp->w_p_rl)
rightleft = 1;
#endif
screen_fill(wp->w_winpos + srow,
wp->w_winpos + wp->w_height, 0, (int)Columns, '@', ' ');
#ifdef RIGHTLEFT
rightleft = 0;
#endif
wp->w_botline = lnum;
wp->w_empty_rows = wp->w_height - srow;
}
}
else
{
/* make sure the rest of the screen is blank */
/* put '~'s on rows that aren't part of the file. */
#ifdef RIGHTLEFT
if (wp->w_p_rl)
rightleft = 1;
#endif
screen_fill(wp->w_winpos + row,
wp->w_winpos + wp->w_height, 0, (int)Columns, '~', ' ');
#ifdef RIGHTLEFT
rightleft = 0;
#endif
wp->w_empty_rows = wp->w_height - row;
if (done) /* we hit the end of the file */
wp->w_botline = wp->w_buffer->b_ml.ml_line_count + 1;
else
wp->w_botline = lnum;
}
wp->w_redr_type = 0;
}
/*
* mark all status lines for redraw; used after first :cd
*/
void
status_redraw_all()
{
WIN *wp;
for (wp = firstwin; wp; wp = wp->w_next)
wp->w_redr_status = TRUE;
updateScreen(NOT_VALID);
}
/*
* Redraw the status line of window wp.
*
* If inversion is possible we use it. Else '=' characters are used.
*/
void
win_redr_status(wp)
WIN *wp;
{
int row;
char_u *p;
int len;
int fillchar;
if (wp->w_status_height) /* if there is a status line */
{
if (set_highlight('s') == OK) /* can highlight */
{
fillchar = ' ';
start_highlight();
}
else /* can't highlight, use '=' */
fillchar = '=';
p = wp->w_buffer->b_xfilename;
if (p == NULL)
STRCPY(NameBuff, "[No File]");
else
{
home_replace(wp->w_buffer, p, NameBuff, MAXPATHL);
trans_characters(NameBuff, MAXPATHL);
}
p = NameBuff;
len = STRLEN(p);
if (wp->w_buffer->b_help || wp->w_buffer->b_changed ||
wp->w_buffer->b_p_ro)
*(p + len++) = ' ';
if (wp->w_buffer->b_help)
{
STRCPY(p + len, "[help]");
len += 6;
}
if (wp->w_buffer->b_changed)
{
STRCPY(p + len, "[+]");
len += 3;
}
if (wp->w_buffer->b_p_ro)
{
STRCPY(p + len, "[RO]");
len += 4;
}
if (len > ru_col - 1)
{
p += len - (ru_col - 1);
*p = '<';
len = ru_col - 1;
}
row = wp->w_winpos + wp->w_height;
screen_msg(p, row, 0);
screen_fill(row, row + 1, len, ru_col, fillchar, fillchar);
stop_highlight();
win_redr_ruler(wp, TRUE);
}
else /* no status line, can only be last window */
redraw_cmdline = TRUE;
wp->w_redr_status = FALSE;
}
/*
* display line "lnum" of window 'wp' on the screen
* Start at row "startrow", stop when "endrow" is reached.
* Return the number of last row the line occupies.
*/
static int
win_line(wp, lnum, startrow, endrow)
WIN *wp;
linenr_t lnum;
int startrow;
int endrow;
{
char_u *screenp;
int c;
int col; /* visual column on screen */
long vcol; /* visual column for tabs */
int row; /* row in the window, excl w_winpos */
int screen_row; /* row on the screen, incl w_winpos */
char_u *ptr;
char_u extra[16]; /* "%ld" must fit in here */
char_u *p_extra;
char_u *showbreak = NULL;
int n_extra;
int n_spaces = 0;
int fromcol, tocol; /* start/end of inverting */
int noinvcur = FALSE; /* don't invert the cursor */
FPOS *top, *bot;
if (startrow > endrow) /* past the end already! */
return startrow;
row = startrow;
screen_row = row + wp->w_winpos;
col = 0;
vcol = 0;
fromcol = -10;
tocol = MAXCOL;
canopt = TRUE;
/*
* handle visual active in this window
*/
if (VIsual_active && wp->w_buffer == curwin->w_buffer)
{
/* Visual is after curwin->w_cursor */
if (ltoreq(curwin->w_cursor, VIsual))
{
top = &curwin->w_cursor;
bot = &VIsual;
}
else /* Visual is before curwin->w_cursor */
{
top = &VIsual;
bot = &curwin->w_cursor;
}
if (VIsual_mode == Ctrl('V')) /* block mode */
{
if (lnum >= top->lnum && lnum <= bot->lnum)
{
colnr_t from, to;
getvcol(wp, top, (colnr_t *)&fromcol, NULL, (colnr_t *)&tocol);
getvcol(wp, bot, &from, NULL, &to);
if ((int)from < fromcol)
fromcol = from;
if ((int)to > tocol)
tocol = to;
++tocol;
if (wp->w_curswant == MAXCOL)
tocol = MAXCOL;
}
}
else /* non-block mode */
{
if (lnum > top->lnum && lnum <= bot->lnum)
fromcol = 0;
else if (lnum == top->lnum)
getvcol(wp, top, (colnr_t *)&fromcol, NULL, NULL);
if (lnum == bot->lnum)
{
getvcol(wp, bot, NULL, NULL, (colnr_t *)&tocol);
++tocol;
}
if (VIsual_mode == 'V') /* linewise */
{
if (fromcol > 0)
fromcol = 0;
tocol = MAXCOL;
}
}
/* if the cursor can't be switched off, don't invert the
* character where the cursor is */
#ifndef MSDOS
if (!highlight_match && *T_VI == NUL &&
lnum == curwin->w_cursor.lnum && wp == curwin)
noinvcur = TRUE;
#endif
if (tocol <= (int)wp->w_leftcol) /* inverting is left of screen */
fromcol = 0;
/* start of invert is left of screen */
else if (fromcol >= 0 && fromcol < (int)wp->w_leftcol)
fromcol = wp->w_leftcol;
/* if inverting in this line, can't optimize cursor positioning */
if (fromcol >= 0)
canopt = FALSE;
}
/*
* handle incremental search position highlighting
*/
else if (highlight_match && wp == curwin && search_match_len)
{
if (lnum == curwin->w_cursor.lnum)
{
getvcol(curwin, &(curwin->w_cursor),
(colnr_t *)&fromcol, NULL, NULL);
curwin->w_cursor.col += search_match_len;
getvcol(curwin, &(curwin->w_cursor),
(colnr_t *)&tocol, NULL, NULL);
curwin->w_cursor.col -= search_match_len;
canopt = FALSE;
if (fromcol == tocol) /* do at least one character */
tocol = fromcol + 1; /* happens when past end of line */
}
}
ptr = ml_get_buf(wp->w_buffer, lnum, FALSE);
if (!wp->w_p_wrap) /* advance to first character to be displayed */
{
while ((colnr_t)vcol < wp->w_leftcol && *ptr)
vcol += win_chartabsize(wp, *ptr++, (colnr_t)vcol);
if ((colnr_t)vcol > wp->w_leftcol)
{
n_spaces = vcol - wp->w_leftcol; /* begin with some spaces */
vcol = wp->w_leftcol;
}
}
screenp = LinePointers[screen_row];
#ifdef RIGHTLEFT
if (wp->w_p_rl)
{
col = Columns - 1; /* col follows screenp here */
screenp += Columns - 1;
}
#endif
if (wp->w_p_nu)
{
#ifdef RIGHTLEFT
if (wp->w_p_rl) /* reverse line numbers */
{
char_u *c1, *c2, t;
sprintf((char *)extra, " %-7ld", (long)lnum);
for (c1 = extra, c2 = extra + STRLEN(extra) - 1; c1 < c2;
c1++, c2--)
{
t = *c1;
*c1 = *c2;
*c2 = t;
}
}
else
#endif
sprintf((char *)extra, "%7ld ", (long)lnum);
p_extra = extra;
n_extra = 8;
vcol -= 8; /* so vcol is 0 when line number has been printed */
}
else
{
p_extra = NULL;
n_extra = 0;
}
for (;;)
{
if (!canopt) /* Visual or match highlighting in this line */
{
if (((vcol == fromcol && !(noinvcur &&
(colnr_t)vcol == wp->w_virtcol)) ||
(noinvcur && (colnr_t)vcol == wp->w_virtcol + 1 &&
vcol >= fromcol)) && vcol < tocol)
start_highlight(); /* start highlighting */
else if (attributes && (vcol == tocol ||
(noinvcur && (colnr_t)vcol == wp->w_virtcol)))
stop_highlight(); /* stop highlighting */
}
/* Get the next character to put on the screen. */
/*
* if 'showbreak' is set it contains the characters to put at the
* start of each broken line
*/
if (
#ifdef RIGHTLEFT
(wp->w_p_rl ? col == -1 : col == Columns)
#else
col == Columns
#endif
&& (*ptr != NUL || (wp->w_p_list && n_extra == 0) ||
(n_extra && *p_extra) || n_spaces) &&
vcol != 0 && STRLEN(p_sbr) != 0)
showbreak = p_sbr;
if (showbreak != NULL)
{
c = *showbreak++;
if (*showbreak == NUL)
showbreak = NULL;
}
/*
* The 'extra' array contains the extra stuff that is inserted to
* represent special characters (non-printable stuff).
*/
else if (n_extra)
{
c = *p_extra++;
n_extra--;
}
else if (n_spaces)
{
c = ' ';
n_spaces--;
}
else
{
c = *ptr++;
/*
* Found last space before word: check for line break
*/
if (wp->w_p_lbr && isbreak(c) && !isbreak(*ptr) && !wp->w_p_list)
{
n_spaces = win_lbr_chartabsize(wp, ptr - 1,
(colnr_t)vcol, NULL) - 1;
if (vim_iswhite(c))
c = ' ';
}
else if (!isprintchar(c))
{
/*
* when getting a character from the file, we may have to turn
* it into something else on the way to putting it into
* 'NextScreen'.
*/
if (c == TAB && !wp->w_p_list)
{
/* tab amount depends on current column */
n_spaces = (int)wp->w_buffer->b_p_ts -
vcol % (int)wp->w_buffer->b_p_ts - 1;
c = ' ';
}
else if (c == NUL && wp->w_p_list)
{
p_extra = (char_u *)"";
n_extra = 1;
c = '$';
--ptr; /* put it back at the NUL */
}
else if (c != NUL)
{
p_extra = transchar(c);
n_extra = charsize(c) - 1;
c = *p_extra++;
}
}
}
if (c == NUL)
{
if (attributes)
{
/* invert at least one char, used for Visual and empty line or
* highlight match at end of line. If it's beyond the last
* char on the screen, just overwrite that one (tricky!) */
if (vcol == fromcol)
{
#ifdef RIGHTLEFT
if (wp->w_p_rl)
{
if (col < 0)
{
++screenp;
++col;
}
}
else
#endif
{
if (col >= Columns)
{
--screenp;
--col;
}
}
if (*screenp != ' ' || *(screenp + Columns) != attributes)
{
*screenp = ' ';
*(screenp + Columns) = attributes;
screen_char(screenp, screen_row, col);
}
#ifdef RIGHTLEFT
if (wp->w_p_rl)
{
--screenp;
--col;
}
else
#endif
{
++screenp;
++col;
}
}
stop_highlight();
}
/*
* blank out the rest of this row, if necessary
*/
#ifdef RIGHTLEFT
if (wp->w_p_rl)
{
while (col >= 0 && *screenp == ' ' &&
*(screenp + Columns) == 0)
{
--screenp;
--col;
}
if (col >= 0)
screen_fill(screen_row, screen_row + 1,
0, col + 1, ' ', ' ');
}
else
#endif
{
while (col < Columns && *screenp == ' ' &&
*(screenp + Columns) == 0)
{
++screenp;
++col;
}
if (col < Columns)
screen_fill(screen_row, screen_row + 1,
col, (int)Columns, ' ', ' ');
}
row++;
break;
}
if (
#ifdef RIGHTLEFT
wp->w_p_rl ? (col < 0) :
#endif
(col >= Columns)
)
{
col = 0;
++row;
++screen_row;
if (!wp->w_p_wrap)
break;
if (row == endrow) /* line got too long for screen */
{
++row;
break;
}
screenp = LinePointers[screen_row];
#ifdef RIGHTLEFT
if (wp->w_p_rl)
{
col = Columns - 1; /* col is not used if breaking! */
screenp += Columns - 1;
}
#endif
}
/*
* Store the character in NextScreen.
*/
if (*screenp != c || *(screenp + Columns) != attributes)
{
/*
* Special trick to make copy/paste of wrapped lines work with
* xterm/screen:
* If the first column is to be written, write the preceding
* char twice. This will work with all terminal types
* (regardless of the xn,am settings).
* Only do this on a fast tty.
*/
if (p_tf && row > startrow && col == 0 &&
LinePointers[screen_row - 1][Columns - 1 + Columns] ==
attributes)
{
if (screen_cur_row != screen_row - 1 ||
screen_cur_col != Columns)
screen_char(LinePointers[screen_row - 1] + Columns - 1,
screen_row - 1, (int)(Columns - 1));
screen_char(LinePointers[screen_row - 1] + Columns - 1,
screen_row - 1, (int)Columns);
screen_start();
}
*screenp = c;
*(screenp + Columns) = attributes;
screen_char(screenp, screen_row, col);
}
#ifdef RIGHTLEFT
if (wp->w_p_rl)
{
--screenp;
--col;
}
else
#endif
{
++screenp;
++col;
}
++vcol;
/* stop before '$' of change command */
if (wp == curwin && dollar_vcol && vcol >= (long)wp->w_virtcol)
break;
}
stop_highlight();
return (row);
}
/*
* Called when p_dollar is set: display a '$' at the end of the changed text
* Only works when cursor is in the line that changes.
*/
void
display_dollar(col)
colnr_t col;
{
colnr_t save_col;
if (RedrawingDisabled)
return;
cursor_off();
save_col = curwin->w_cursor.col;
curwin->w_cursor.col = col;
curs_columns(FALSE);
if (!curwin->w_p_wrap)
curwin->w_col -= curwin->w_leftcol;
if (curwin->w_col < Columns)
{
screen_msg((char_u *)"$", curwin->w_winpos + curwin->w_row,
#ifdef RIGHTLEFT
curwin->w_p_rl ? (int)Columns - 1 - curwin->w_col :
#endif
curwin->w_col);
dollar_vcol = curwin->w_virtcol;
}
curwin->w_cursor.col = save_col;
}
/*
* Call this function before moving the cursor from the normal insert position
* in insert mode.
*/
void
undisplay_dollar()
{
if (dollar_vcol)
{
dollar_vcol = 0;
updateline();
}
}
/*
* output a single character directly to the screen
* update NextScreen
*/
void
screen_outchar(c, row, col)
int c;
int row, col;
{
char_u buf[2];
buf[0] = c;
buf[1] = NUL;
screen_msg(buf, row, col);
}
/*
* put string '*text' on the screen at position 'row' and 'col'
* update NextScreen
* Note: only outputs within one row, message is truncated at screen boundary!
* Note: if NextScreen, row and/or col is invalid, nothing is done.
*/
void
screen_msg(text, row, col)
char_u *text;
int row;
int col;
{
char_u *screenp;
if (NextScreen != NULL && row < Rows) /* safety check */
{
screenp = LinePointers[row] + col;
while (*text && col < Columns)
{
if (*screenp != *text || *(screenp + Columns) != attributes)
{
*screenp = *text;
*(screenp + Columns) = attributes;
screen_char(screenp, row, col);
}
++screenp;
++col;
++text;
}
}
}
/*
* Reset cursor position. Use whenever cursor was moved because of outputting
* something directly to the screen (shell commands) or a terminal control
* code.
*/
void
screen_start()
{
screen_cur_row = screen_cur_col = 9999;
}
/*
* set_highlight - set highlight depending on 'highlight' option and context.
*
* return FAIL if highlighting is not possible, OK otherwise
*/
int
set_highlight(context)
int context;
{
int i;
int mode;
char_u *p;
/*
* Try to find the mode in the 'highlight' option.
* If not found, try the default for the 'highlight' option.
* If still not found, use 'r' (should not happen).
*/
mode = 'r';
for (i = 0; i < 2; ++i)
{
if (i)
p = get_highlight_default();
else
p = p_hl;
if (p == NULL)
continue;
while (*p)
{
if (*p == context) /* found what we are looking for */
break;
while (*p && *p != ',') /* skip to comma */
++p;
p = skip_to_option_part(p); /* skip comma and spaces */
}
if (p[0] && p[1])
{
mode = p[1];
break;
}
}
switch (mode)
{
case 'b': highlight = T_MD; /* bold */
unhighlight = T_ME;
highlight_attr = CHAR_BOLD;
break;
case 's': highlight = T_SO; /* standout */
unhighlight = T_SE;
highlight_attr = CHAR_STDOUT;
break;
case 'n': highlight = NULL; /* no highlighting */
unhighlight = NULL;
highlight_attr = 0;
break;
case 'u': highlight = T_US; /* underline */
unhighlight = T_UE;
highlight_attr = CHAR_UNDERL;
break;
case 'i': highlight = T_CZH; /* italic */
unhighlight = T_CZR;
highlight_attr = CHAR_ITALIC;
break;
default: highlight = T_MR; /* reverse (invert) */
unhighlight = T_ME;
highlight_attr = CHAR_INVERT;
break;
}
if (highlight == NULL || *highlight == NUL ||
unhighlight == NULL || *unhighlight == NUL)
{
highlight = NULL;
return FAIL;
}
return OK;
}
void
start_highlight()
{
if (full_screen &&
#ifdef WIN32
termcap_active &&
#endif
highlight != NULL)
{
outstr(highlight);
attributes = highlight_attr;
}
}
void
stop_highlight()
{
if (attributes)
{
outstr(unhighlight);
attributes = 0;
}
}
/*
* variables used for one level depth of highlighting
* Used for "-- More --" message.
*/
static char_u *old_highlight = NULL;
static char_u *old_unhighlight = NULL;
static int old_highlight_attr = 0;
void
remember_highlight()
{
old_highlight = highlight;
old_unhighlight = unhighlight;
old_highlight_attr = highlight_attr;
}
void
recover_old_highlight()
{
highlight = old_highlight;
unhighlight = old_unhighlight;
highlight_attr = old_highlight_attr;
}
/*
* put character '*p' on the screen at position 'row' and 'col'
*/
static void
screen_char(p, row, col)
char_u *p;
int row;
int col;
{
int c;
int noinvcurs;
/*
* Outputting the last character on the screen may scrollup the screen.
* Don't to it!
*/
if (col == Columns - 1 && row == Rows - 1)
return;
if (screen_cur_col != col || screen_cur_row != row)
{
/* check if no cursor movement is allowed in standout mode */
if (attributes && !p_wiv && *T_MS == NUL)
noinvcurs = 7;
else
noinvcurs = 0;
/*
* If we're on the same row (which happens a lot!), try to
* avoid a windgoto().
* If we are only a few characters off, output the
* characters. That is faster than cursor positioning.
* This can't be used when switching between inverting and not
* inverting.
*/
if (screen_cur_row == row && screen_cur_col < col)
{
register int i;
i = col - screen_cur_col;
if (i <= 4 + noinvcurs)
{
/* stop at the first character that has different attributes
* from the ones that are active */
while (i && *(p - i + Columns) == attributes)
{
c = *(p - i--);
outchar(c);
}
}
if (i)
{
if (noinvcurs)
stop_highlight();
if (*T_CRI != NUL) /* use tgoto interface! jw */
OUTSTR(tgoto((char *)T_CRI, 0, i));
else
windgoto(row, col);
if (noinvcurs)
start_highlight();
}
}
/*
* If the cursor is at the line above where we want to be, use CR LF,
* this is quicker than windgoto().
* Don't do this if the cursor went beyond the last column, the cursor
* position is unknown then (some terminals wrap, some don't )
*/
else if (screen_cur_row + 1 == row && col == 0 &&
screen_cur_col < Columns)
{
if (noinvcurs)
stop_highlight();
outchar('\n');
if (noinvcurs)
start_highlight();
}
else
{
if (noinvcurs)
stop_highlight();
windgoto(row, col);
if (noinvcurs)
start_highlight();
}
screen_cur_row = row;
screen_cur_col = col;
}
/*
* For weird invert mechanism: output (un)highlight before every char
* Lots of extra output, but works.
*/
if (p_wiv)
{
if (attributes)
outstr(highlight);
else if (full_screen)
outstr(unhighlight);
}
outchar(*p);
screen_cur_col++;
}
/*
* Fill the screen from 'start_row' to 'end_row', from 'start_col' to 'end_col'
* with character 'c1' in first column followed by 'c2' in the other columns.
*/
void
screen_fill(start_row, end_row, start_col, end_col, c1, c2)
int start_row, end_row;
int start_col, end_col;
int c1, c2;
{
int row;
int col;
char_u *screenp;
char_u *attrp;
int did_delete;
int c;
if (end_row > Rows) /* safety check */
end_row = Rows;
if (end_col > Columns) /* safety check */
end_col = Columns;
if (NextScreen == NULL ||
start_row >= end_row || start_col >= end_col) /* nothing to do */
return;
for (row = start_row; row < end_row; ++row)
{
/* try to use delete-line termcap code */
did_delete = FALSE;
if (attributes == 0 && c2 == ' ' && end_col == Columns && *T_CE != NUL
#ifdef RIGHTLEFT
&& !rightleft
#endif
)
{
/*
* check if we really need to clear something
*/
col = start_col;
screenp = LinePointers[row] + start_col;
if (c1 != ' ') /* don't clear first char */
{
++col;
++screenp;
}
/* skip blanks (used often, keep it fast!) */
attrp = screenp + Columns;
while (col < end_col && *screenp == ' ' && *attrp == 0)
{
++col;
++screenp;
++attrp;
}
if (col < end_col) /* something to be cleared */
{
windgoto(row, col); /* clear rest of this screen line */
outstr(T_CE);
screen_start(); /* don't know where cursor is now */
col = end_col - col;
while (col--) /* clear chars in NextScreen */
{
*attrp++ = 0;
*screenp++ = ' ';
}
}
did_delete = TRUE; /* the chars are cleared now */
}
screenp = LinePointers[row] +
#ifdef RIGHTLEFT
(rightleft ? (int)Columns - 1 - start_col : start_col);
#else
start_col;
#endif
c = c1;
for (col = start_col; col < end_col; ++col)
{
if (*screenp != c || *(screenp + Columns) != attributes)
{
*screenp = c;
*(screenp + Columns) = attributes;
if (!did_delete || c != ' ')
screen_char(screenp, row,
#ifdef RIGHTLEFT
rightleft ? Columns - 1 - col :
#endif
col);
}
#ifdef RIGHTLEFT
if (rightleft)
--screenp;
else
#endif
++screenp;
if (col == start_col)
{
if (did_delete)
break;
c = c2;
}
}
if (row == Rows - 1) /* overwritten the command line */
{
redraw_cmdline = TRUE;
if (c1 == ' ' && c2 == ' ')
clear_cmdline = FALSE; /* command line has been cleared */
}
}
}
/*
* recompute all w_botline's. Called after Rows changed.
*/
void
comp_Botline_all()
{
WIN *wp;
for (wp = firstwin; wp; wp = wp->w_next)
comp_Botline(wp);
}
/*
* compute wp->w_botline. Can be called after wp->w_topline changed.
*/
void
comp_Botline(wp)
WIN *wp;
{
comp_Botline_sub(wp, wp->w_topline, 0);
}
/*
* Compute wp->w_botline, may have a start at the cursor position.
* Code shared between comp_Botline() and cursupdate().
*/
static void
comp_Botline_sub(wp, lnum, done)
WIN *wp;
linenr_t lnum;
int done;
{
int n;
for ( ; lnum <= wp->w_buffer->b_ml.ml_line_count; ++lnum)
{
n = plines_win(wp, lnum);
if (done + n > wp->w_height)
break;
done += n;
}
/* wp->w_botline is the line that is just below the window */
wp->w_botline = lnum;
/* Also set wp->w_empty_rows, otherwise scroll_cursor_bot() won't work */
if (done == 0)
wp->w_empty_rows = 0; /* single line that doesn't fit */
else
wp->w_empty_rows = wp->w_height - done;
}
void
screenalloc(clear)
int clear;
{
register int new_row, old_row;
WIN *wp;
int outofmem = FALSE;
int len;
char_u *new_NextScreen;
char_u **new_LinePointers;
/*
* Allocation of the screen buffers is done only when the size changes
* and when Rows and Columns have been set and we are doing full screen
* stuff.
*/
if ((NextScreen != NULL && Rows == screen_Rows && Columns == screen_Columns)
|| Rows == 0 || Columns == 0 || !full_screen)
return;
comp_col(); /* recompute columns for shown command and ruler */
/*
* We're changing the size of the screen.
* - Allocate new arrays for NextScreen.
* - Move lines from the old arrays into the new arrays, clear extra
* lines (unless the screen is going to be cleared).
* - Free the old arrays.
*/
for (wp = firstwin; wp; wp = wp->w_next)
win_free_lsize(wp);
new_NextScreen = (char_u *)malloc((size_t) (Rows * Columns * 2));
new_LinePointers = (char_u **)malloc(sizeof(char_u *) * Rows);
for (wp = firstwin; wp; wp = wp->w_next)
{
if (win_alloc_lsize(wp) == FAIL)
{
outofmem = TRUE;
break;
}
}
if (new_NextScreen == NULL || new_LinePointers == NULL || outofmem)
{
do_outofmem_msg();
vim_free(new_NextScreen);
new_NextScreen = NULL;
}
else
{
for (new_row = 0; new_row < Rows; ++new_row)
{
new_LinePointers[new_row] = new_NextScreen + new_row * Columns * 2;
/*
* If the screen is not going to be cleared, copy as much as
* possible from the old screen to the new one and clear the rest
* (used when resizing the window at the "--more--" prompt or when
* executing an external command, for the GUI).
*/
if (!clear)
{
lineclear(new_LinePointers[new_row]);
old_row = new_row + (screen_Rows - Rows);
if (old_row >= 0)
{
if (screen_Columns < Columns)
len = screen_Columns;
else
len = Columns;
vim_memmove(new_LinePointers[new_row],
LinePointers[old_row], (size_t)len);
vim_memmove(new_LinePointers[new_row] + Columns,
LinePointers[old_row] + screen_Columns, (size_t)len);
}
}
}
}
vim_free(NextScreen);
vim_free(LinePointers);
NextScreen = new_NextScreen;
LinePointers = new_LinePointers;
must_redraw = CLEAR; /* need to clear the screen later */
if (clear)
screenclear2();
#ifdef USE_GUI
else if (gui.in_use && NextScreen != NULL && Rows != screen_Rows)
{
gui_redraw_block(0, 0, Rows - 1, Columns - 1);
/*
* Adjust the position of the cursor, for when executing an external
* command.
*/
if (msg_row >= Rows) /* Rows got smaller */
msg_row = Rows - 1; /* put cursor at last row */
else if (Rows > screen_Rows) /* Rows got bigger */
msg_row += Rows - screen_Rows; /* put cursor in same place */
if (msg_col >= Columns) /* Columns got smaller */
msg_col = Columns - 1; /* put cursor at last column */
}
#endif
screen_Rows = Rows;
screen_Columns = Columns;
}
void
screenclear()
{
if (emsg_on_display)
{
mch_delay(1000L, TRUE);
emsg_on_display = FALSE;
}
screenalloc(FALSE); /* allocate screen buffers if size changed */
screenclear2(); /* clear the screen */
}
static void
screenclear2()
{
int i;
if (starting || NextScreen == NULL)
return;
outstr(T_CL); /* clear the display */
/* blank out NextScreen */
for (i = 0; i < Rows; ++i)
lineclear(LinePointers[i]);
screen_cleared = TRUE; /* can use contents of NextScreen now */
win_rest_invalid(firstwin);
clear_cmdline = FALSE;
redraw_cmdline = TRUE;
if (must_redraw == CLEAR) /* no need to clear again */
must_redraw = NOT_VALID;
compute_cmdrow();
msg_pos((int)Rows - 1, 0); /* put cursor on last line for messages */
screen_start(); /* don't know where cursor is now */
msg_scrolled = 0; /* can't scroll back */
msg_didany = FALSE;
msg_didout = FALSE;
}
/*
* Clear one line in NextScreen.
*/
static void
lineclear(p)
char_u *p;
{
(void)vim_memset(p, ' ', (size_t)Columns);
(void)vim_memset(p + Columns, 0, (size_t)Columns);
}
/*
* check cursor for a valid lnum
*/
void
check_cursor()
{
if (curwin->w_cursor.lnum > curbuf->b_ml.ml_line_count)
curwin->w_cursor.lnum = curbuf->b_ml.ml_line_count;
if (curwin->w_cursor.lnum <= 0)
curwin->w_cursor.lnum = 1;
}
void
cursupdate()
{
linenr_t lnum;
long line_count;
int sline;
int done;
int temp;
if (!screen_valid(TRUE))
return;
/*
* Make sure the cursor is on a valid line number
*/
check_cursor();
/*
* If the buffer is empty, always set topline to 1.
*/
if (bufempty()) /* special case - file is empty */
{
curwin->w_topline = 1;
curwin->w_cursor.lnum = 1;
curwin->w_cursor.col = 0;
curwin->w_lsize[0] = 0;
if (curwin->w_lsize_valid == 0) /* don't know about screen contents */
updateScreen(NOT_VALID);
curwin->w_lsize_valid = 1;
}
/*
* If the cursor is above the top of the window, scroll the window to put
* it at the top of the window.
* If we weren't very close to begin with, we scroll to put the cursor in
* the middle of the window.
*/
else if (curwin->w_cursor.lnum < curwin->w_topline + p_so &&
curwin->w_topline > 1)
{
temp = curwin->w_height / 2 - 1;
if (temp < 2)
temp = 2;
/* not very close, put cursor halfway screen */
if (curwin->w_topline + p_so - curwin->w_cursor.lnum >= temp)
scroll_cursor_halfway(FALSE);
else
scroll_cursor_top((int)p_sj, FALSE);
updateScreen(VALID);
}
/*
* If the cursor is below the bottom of the window, scroll the window
* to put the cursor on the window. If the cursor is less than a
* windowheight down compute the number of lines at the top which have
* the same or more rows than the rows of the lines below the bottom.
* Note: After curwin->w_botline was computed lines may have been
* added or deleted, it may be greater than ml_line_count.
*/
else if ((long)curwin->w_cursor.lnum >= (long)curwin->w_botline - p_so &&
curwin->w_botline <= curbuf->b_ml.ml_line_count)
{
line_count = curwin->w_cursor.lnum - curwin->w_botline + 1 + p_so;
if (line_count <= curwin->w_height + 1)
scroll_cursor_bot((int)p_sj, FALSE);
else
scroll_cursor_halfway(FALSE);
updateScreen(VALID);
}
/*
* If the window contents is unknown, need to update the screen.
*/
else if (curwin->w_lsize_valid == 0)
updateScreen(NOT_VALID);
/*
* Figure out the row number of the cursor line.
* This is used often, keep it fast!
*/
curwin->w_row = sline = 0;
/* curwin->w_lsize[] invalid */
if (RedrawingDisabled || curwin->w_lsize_valid == 0)
{
done = 0;
for (lnum = curwin->w_topline; lnum != curwin->w_cursor.lnum; ++lnum)
done += plines(lnum);
curwin->w_row = done;
/*
* Also need to compute w_botline and w_empty_rows, because
* updateScreen() will not have done that.
*/
comp_Botline_sub(curwin, lnum, done);
}
else
{
for (done = curwin->w_cursor.lnum - curwin->w_topline; done > 0; --done)
curwin->w_row += curwin->w_lsize[sline++];
}
curwin->w_cline_row = curwin->w_row;
curwin->w_col = curwin->w_virtcol = 0;
if (!RedrawingDisabled && sline > curwin->w_lsize_valid)
/* Should only happen with a line that is too */
/* long to fit on the last screen line. */
curwin->w_cline_height = 0;
else
{
/* curwin->w_lsize[] invalid */
if (RedrawingDisabled || curwin->w_lsize_valid == 0)
curwin->w_cline_height = plines(curwin->w_cursor.lnum);
else
curwin->w_cline_height = curwin->w_lsize[sline];
/* compute curwin->w_virtcol and curwin->w_col */
curs_columns(!RedrawingDisabled);
if (must_redraw)
updateScreen(must_redraw);
}
if (curwin->w_set_curswant)
{
curwin->w_curswant = curwin->w_virtcol;
curwin->w_set_curswant = FALSE;
}
}
/*
* Recompute topline to put the cursor at the top of the window.
* Scroll at least "min_scroll" lines.
* If "always" is TRUE, always set topline (for "zt").
*/
void
scroll_cursor_top(min_scroll, always)
int min_scroll;
int always;
{
int scrolled = 0;
int extra = 0;
int used;
int i;
int sline; /* screen line for cursor */
/*
* Decrease topline until:
* - it has become 1
* - (part of) the cursor line is moved off the screen or
* - moved at least 'scrolljump' lines and
* - at least 'scrolloff' lines above and below the cursor
*/
used = plines(curwin->w_cursor.lnum);
for (sline = 1; sline < curwin->w_cursor.lnum; ++sline)
{
i = plines(curwin->w_cursor.lnum - sline);
used += i;
extra += i;
if (extra <= p_so &&
curwin->w_cursor.lnum + sline < curbuf->b_ml.ml_line_count)
used += plines(curwin->w_cursor.lnum + sline);
if (used > curwin->w_height)
break;
if (curwin->w_cursor.lnum - sline < curwin->w_topline)
scrolled += i;
/*
* If scrolling is needed, scroll at least 'sj' lines.
*/
if ((curwin->w_cursor.lnum - (sline - 1) >= curwin->w_topline ||
scrolled >= min_scroll) && extra > p_so)
break;
}
/*
* If we don't have enough space, put cursor in the middle.
* This makes sure we get the same position when using "k" and "j"
* in a small window.
*/
if (used > curwin->w_height)
scroll_cursor_halfway(FALSE);
else
{
/*
* If "always" is FALSE, only adjust topline to a lower value, higher
* value may happen with wrapping lines
*/
if (curwin->w_cursor.lnum - (sline - 1) < curwin->w_topline || always)
curwin->w_topline = curwin->w_cursor.lnum - (sline - 1);
if (curwin->w_topline > curwin->w_cursor.lnum)
curwin->w_topline = curwin->w_cursor.lnum;
}
}
/*
* Recompute topline to put the cursor at the bottom of the window.
* Scroll at least "min_scroll" lines.
* If "set_topline" is TRUE, set topline and botline first (for "zb").
* This is messy stuff!!!
*/
void
scroll_cursor_bot(min_scroll, set_topline)
int min_scroll;
int set_topline;
{
int used;
int scrolled = 0;
int extra = 0;
int sline; /* screen line for cursor from bottom */
int i;
linenr_t lnum;
linenr_t line_count;
linenr_t old_topline = curwin->w_topline;
linenr_t old_botline = curwin->w_botline;
int old_empty_rows = curwin->w_empty_rows;
linenr_t cln; /* Cursor Line Number */
cln = curwin->w_cursor.lnum;
if (set_topline)
{
used = 0;
curwin->w_botline = cln + 1;
for (curwin->w_topline = curwin->w_botline;
curwin->w_topline != 1;
--curwin->w_topline)
{
i = plines(curwin->w_topline - 1);
if (used + i > curwin->w_height)
break;
used += i;
}
curwin->w_empty_rows = curwin->w_height - used;
}
used = plines(cln);
if (cln >= curwin->w_botline)
{
scrolled = used;
if (cln == curwin->w_botline)
scrolled -= curwin->w_empty_rows;
}
/*
* Stop counting lines to scroll when
* - hitting start of the file
* - scrolled nothing or at least 'sj' lines
* - at least 'so' lines below the cursor
* - lines between botline and cursor have been counted
*/
for (sline = 1; sline < cln; ++sline)
{
if ((((scrolled <= 0 || scrolled >= min_scroll) && extra >= p_so) ||
cln + sline > curbuf->b_ml.ml_line_count) &&
cln - sline < curwin->w_botline)
break;
i = plines(cln - sline);
used += i;
if (used > curwin->w_height)
break;
if (cln - sline >= curwin->w_botline)
{
scrolled += i;
if (cln - sline == curwin->w_botline)
scrolled -= curwin->w_empty_rows;
}
if (cln + sline <= curbuf->b_ml.ml_line_count)
{
i = plines(cln + sline);
used += i;
if (used > curwin->w_height)
break;
if (extra < p_so || scrolled < min_scroll)
{
extra += i;
if (cln + sline >= curwin->w_botline)
{
scrolled += i;
if (cln + sline == curwin->w_botline)
scrolled -= curwin->w_empty_rows;
}
}
}
}
/* curwin->w_empty_rows is larger, no need to scroll */
if (scrolled <= 0)
line_count = 0;
/* more than a screenfull, don't scroll but redraw */
else if (used > curwin->w_height)
line_count = used;
/* scroll minimal number of lines */
else
{
for (i = 0, lnum = curwin->w_topline;
i < scrolled && lnum < curwin->w_botline; ++lnum)
i += plines(lnum);
if (i >= scrolled) /* it's possible to scroll */
line_count = lnum - curwin->w_topline;
else /* below curwin->w_botline, don't scroll */
line_count = 9999;
}
/*
* Scroll up if the cursor is off the bottom of the screen a bit.
* Otherwise put it at 1/2 of the screen.
*/
if (line_count >= curwin->w_height && line_count > min_scroll)
scroll_cursor_halfway(FALSE);
else
scrollup(line_count);
/*
* If topline didn't change we need to restore w_botline and w_empty_rows
* (we changed them).
* If topline did change, updateScreen() will set botline.
*/
if (curwin->w_topline == old_topline && set_topline)
{
curwin->w_botline = old_botline;
curwin->w_empty_rows = old_empty_rows;
}
}
/*
* Recompute topline to put the cursor halfway the window
* If "atend" is TRUE, also put it halfway at the end of the file.
*/
void
scroll_cursor_halfway(atend)
int atend;
{
int above = 0;
linenr_t topline;
int below = 0;
linenr_t botline;
int used;
int i;
linenr_t cln; /* Cursor Line Number */
topline = botline = cln = curwin->w_cursor.lnum;
used = plines(cln);
while (topline > 1)
{
if (below <= above) /* add a line below the cursor */
{
if (botline + 1 <= curbuf->b_ml.ml_line_count)
{
i = plines(botline + 1);
used += i;
if (used > curwin->w_height)
break;
below += i;
++botline;
}
else
{
++below; /* count a "~" line */
if (atend)
++used;
}
}
if (below > above) /* add a line above the cursor */
{
i = plines(topline - 1);
used += i;
if (used > curwin->w_height)
break;
above += i;
--topline;
}
}
curwin->w_topline = topline;
}
/*
* Correct the cursor position so that it is in a part of the screen at least
* 'so' lines from the top and bottom, if possible.
* If not possible, put it at the same position as scroll_cursor_halfway().
* When called topline and botline must be valid!
*/
void
cursor_correct()
{
int above = 0; /* screen lines above topline */
linenr_t topline;
int below = 0; /* screen lines below botline */
linenr_t botline;
int above_wanted, below_wanted;
linenr_t cln; /* Cursor Line Number */
int max_off;
/*
* How many lines we would like to have above/below the cursor depends on
* whether the first/last line of the file is on screen.
*/
above_wanted = p_so;
below_wanted = p_so;
if (curwin->w_topline == 1)
{
above_wanted = 0;
max_off = curwin->w_height / 2;
if (below_wanted > max_off)
below_wanted = max_off;
}
if (curwin->w_botline == curbuf->b_ml.ml_line_count + 1)
{
below_wanted = 0;
max_off = (curwin->w_height - 1) / 2;
if (above_wanted > max_off)
above_wanted = max_off;
}
/*
* If there are sufficient file-lines above and below the cursor, we can
* return now.
*/
cln = curwin->w_cursor.lnum;
if (cln >= curwin->w_topline + above_wanted &&
cln < curwin->w_botline - below_wanted)
return;
/*
* Narrow down the area where the cursor can be put by taking lines from
* the top and the bottom until:
* - the desired context lines are found
* - the lines from the top is past the lines from the bottom
*/
topline = curwin->w_topline;
botline = curwin->w_botline - 1;
while ((above < above_wanted || below < below_wanted) && topline < botline)
{
if (below < below_wanted && (below <= above || above >= above_wanted))
{
below += plines(botline);
--botline;
}
if (above < above_wanted && (above < below || below >= below_wanted))
{
above += plines(topline);
++topline;
}
}
if (topline == botline || botline == 0)
curwin->w_cursor.lnum = topline;
else if (topline > botline)
curwin->w_cursor.lnum = botline;
else
{
if (cln < topline && curwin->w_topline > 1)
curwin->w_cursor.lnum = topline;
if (cln > botline && curwin->w_botline <= curbuf->b_ml.ml_line_count)
curwin->w_cursor.lnum = botline;
}
}
/*
* Compute curwin->w_row.
* Can be called when topline and botline have not been updated.
* return OK when cursor is in the window, FAIL when it isn't.
*/
int
curs_rows()
{
linenr_t lnum;
int i;
if (curwin->w_cursor.lnum < curwin->w_topline ||
curwin->w_cursor.lnum > curbuf->b_ml.ml_line_count ||
curwin->w_cursor.lnum >= curwin->w_botline)
return FAIL;
curwin->w_row = i = 0;
for (lnum = curwin->w_topline; lnum != curwin->w_cursor.lnum; ++lnum)
if (RedrawingDisabled) /* curwin->w_lsize[] invalid */
curwin->w_row += plines(lnum);
else
curwin->w_row += curwin->w_lsize[i++];
return OK;
}
/*
* compute curwin->w_col and curwin->w_virtcol
*/
void
curs_columns(scroll)
int scroll; /* when TRUE, may scroll horizontally */
{
int diff;
int extra;
int new_leftcol;
colnr_t startcol;
colnr_t endcol;
getvcol(curwin, &curwin->w_cursor,
&startcol, &(curwin->w_virtcol), &endcol);
/* remove '$' from change command when cursor moves onto it */
if (startcol > dollar_vcol)
dollar_vcol = 0;
curwin->w_col = curwin->w_virtcol;
if (curwin->w_p_nu)
{
curwin->w_col += 8;
endcol += 8;
}
curwin->w_row = curwin->w_cline_row;
if (curwin->w_p_wrap) /* long line wrapping, adjust curwin->w_row */
{
while (curwin->w_col >= Columns)
{
curwin->w_col -= Columns;
curwin->w_row++;
}
}
else if (scroll) /* no line wrapping, compute curwin->w_leftcol if
* scrolling is on. If scrolling is off,
* curwin->w_leftcol is assumed to be 0 */
{
/* If Cursor is left of the screen, scroll rightwards */
/* If Cursor is right of the screen, scroll leftwards */
if ((extra = (int)startcol - (int)curwin->w_leftcol) < 0 ||
(extra = (int)endcol - (int)(curwin->w_leftcol + Columns) + 1) > 0)
{
if (extra < 0)
diff = -extra;
else
diff = extra;
/* far off, put cursor in middle of window */
if (p_ss == 0 || diff >= Columns / 2)
new_leftcol = curwin->w_col - Columns / 2;
else
{
if (diff < p_ss)
diff = p_ss;
if (extra < 0)
new_leftcol = curwin->w_leftcol - diff;
else
new_leftcol = curwin->w_leftcol + diff;
}
if (new_leftcol < 0)
curwin->w_leftcol = 0;
else
curwin->w_leftcol = new_leftcol;
/* screen has to be redrawn with new curwin->w_leftcol */
redraw_later(NOT_VALID);
}
curwin->w_col -= curwin->w_leftcol;
}
/* Cursor past end of screen */
/* happens with line that does not fit on screen */
if (curwin->w_row > curwin->w_height - 1)
curwin->w_row = curwin->w_height - 1;
}
void
scrolldown(line_count)
long line_count;
{
register long done = 0; /* total # of physical lines done */
/* Scroll up 'line_count' lines. */
while (line_count--)
{
if (curwin->w_topline == 1)
break;
done += plines(--curwin->w_topline);
}
/*
* Compute the row number of the last row of the cursor line
* and move it onto the screen.
*/
curwin->w_row += done;
if (curwin->w_p_wrap)
curwin->w_row += plines(curwin->w_cursor.lnum) -
1 - curwin->w_virtcol / Columns;
while (curwin->w_row >= curwin->w_height && curwin->w_cursor.lnum > 1)
curwin->w_row -= plines(curwin->w_cursor.lnum--);
comp_Botline(curwin);
}
void
scrollup(line_count)
long line_count;
{
curwin->w_topline += line_count;
if (curwin->w_topline > curbuf->b_ml.ml_line_count)
curwin->w_topline = curbuf->b_ml.ml_line_count;
if (curwin->w_cursor.lnum < curwin->w_topline)
curwin->w_cursor.lnum = curwin->w_topline;
comp_Botline(curwin);
}
/*
* Scroll the screen one line down, but don't do it if it would move the
* cursor off the screen.
*/
void
scrolldown_clamp()
{
int end_row;
if (curwin->w_topline == 1)
return;
/*
* Compute the row number of the last row of the cursor line
* and make sure it doesn't go off the screen. Make sure the cursor
* doesn't go past 'scrolloff' lines from the screen end.
*/
end_row = curwin->w_row + plines(curwin->w_topline - 1);
if (curwin->w_p_wrap)
end_row += plines(curwin->w_cursor.lnum) - 1 -
curwin->w_virtcol / Columns;
if (end_row < curwin->w_height - p_so)
--curwin->w_topline;
}
/*
* Scroll the screen one line up, but don't do it if it would move the cursor
* off the screen.
*/
void
scrollup_clamp()
{
int start_row;
if (curwin->w_topline == curbuf->b_ml.ml_line_count)
return;
/*
* Compute the row number of the first row of the cursor line
* and make sure it doesn't go off the screen. Make sure the cursor
* doesn't go before 'scrolloff' lines from the screen start.
*/
start_row = curwin->w_row - plines(curwin->w_topline);
if (curwin->w_p_wrap)
start_row -= curwin->w_virtcol / Columns;
if (start_row >= p_so)
++curwin->w_topline;
}
/*
* insert 'line_count' lines at 'row' in window 'wp'
* if 'invalid' is TRUE the wp->w_lsize_lnum[] is invalidated.
* if 'mayclear' is TRUE the screen will be cleared if it is faster than
* scrolling.
* Returns FAIL if the lines are not inserted, OK for success.
*/
int
win_ins_lines(wp, row, line_count, invalid, mayclear)
WIN *wp;
int row;
int line_count;
int invalid;
int mayclear;
{
int did_delete;
int nextrow;
int lastrow;
int retval;
if (invalid)
wp->w_lsize_valid = 0;
if (RedrawingDisabled || line_count <= 0 || wp->w_height < 5)
return FAIL;
if (line_count > wp->w_height - row)
line_count = wp->w_height - row;
if (mayclear && Rows - line_count < 5) /* only a few lines left: redraw is faster */
{
screenclear(); /* will set wp->w_lsize_valid to 0 */
return FAIL;
}
/*
* Delete all remaining lines
*/
if (row + line_count >= wp->w_height)
{
screen_fill(wp->w_winpos + row, wp->w_winpos + wp->w_height,
0, (int)Columns, ' ', ' ');
return OK;
}
/*
* when scrolling, the message on the command line should be cleared,
* otherwise it will stay there forever.
*/
clear_cmdline = TRUE;
/*
* if the terminal can set a scroll region, use that
*/
if (scroll_region)
{
scroll_region_set(wp, row);
retval = screen_ins_lines(wp->w_winpos + row, 0, line_count,
wp->w_height - row);
scroll_region_reset();
return retval;
}
if (wp->w_next && p_tf) /* don't delete/insert on fast terminal */
return FAIL;
/*
* If there is a next window or a status line, we first try to delete the
* lines at the bottom to avoid messing what is after the window.
* If this fails and there are following windows, don't do anything to avoid
* messing up those windows, better just redraw.
*/
did_delete = FALSE;
if (wp->w_next || wp->w_status_height)
{
if (screen_del_lines(0, wp->w_winpos + wp->w_height - line_count,
line_count, (int)Rows, FALSE) == OK)
did_delete = TRUE;
else if (wp->w_next)
return FAIL;
}
/*
* if no lines deleted, blank the lines that will end up below the window
*/
if (!did_delete)
{
wp->w_redr_status = TRUE;
redraw_cmdline = TRUE;
nextrow = wp->w_winpos + wp->w_height + wp->w_status_height;
lastrow = nextrow + line_count;
if (lastrow > Rows)
lastrow = Rows;
screen_fill(nextrow - line_count, lastrow - line_count,
0, (int)Columns, ' ', ' ');
}
if (screen_ins_lines(0, wp->w_winpos + row, line_count, (int)Rows) == FAIL)
{
/* deletion will have messed up other windows */
if (did_delete)
{
wp->w_redr_status = TRUE;
win_rest_invalid(wp->w_next);
}
return FAIL;
}
return OK;
}
/*
* delete 'line_count' lines at 'row' in window 'wp'
* If 'invalid' is TRUE curwin->w_lsize_lnum[] is invalidated.
* If 'mayclear' is TRUE the screen will be cleared if it is faster than
* scrolling
* Return OK for success, FAIL if the lines are not deleted.
*/
int
win_del_lines(wp, row, line_count, invalid, mayclear)
WIN *wp;
int row;
int line_count;
int invalid;
int mayclear;
{
int retval;
if (invalid)
wp->w_lsize_valid = 0;
if (RedrawingDisabled || line_count <= 0)
return FAIL;
if (line_count > wp->w_height - row)
line_count = wp->w_height - row;
/* only a few lines left: redraw is faster */
if (mayclear && Rows - line_count < 5)
{
screenclear(); /* will set wp->w_lsize_valid to 0 */
return FAIL;
}
/*
* Delete all remaining lines
*/
if (row + line_count >= wp->w_height)
{
screen_fill(wp->w_winpos + row, wp->w_winpos + wp->w_height,
0, (int)Columns, ' ', ' ');
return OK;
}
/*
* when scrolling, the message on the command line should be cleared,
* otherwise it will stay there forever.
*/
clear_cmdline = TRUE;
/*
* if the terminal can set a scroll region, use that
*/
if (scroll_region)
{
scroll_region_set(wp, row);
retval = screen_del_lines(wp->w_winpos + row, 0, line_count,
wp->w_height - row, FALSE);
scroll_region_reset();
return retval;
}
if (wp->w_next && p_tf) /* don't delete/insert on fast terminal */
return FAIL;
if (screen_del_lines(0, wp->w_winpos + row, line_count,
(int)Rows, FALSE) == FAIL)
return FAIL;
/*
* If there are windows or status lines below, try to put them at the
* correct place. If we can't do that, they have to be redrawn.
*/
if (wp->w_next || wp->w_status_height || cmdline_row < Rows - 1)
{
if (screen_ins_lines(0, wp->w_winpos + wp->w_height - line_count,
line_count, (int)Rows) == FAIL)
{
wp->w_redr_status = TRUE;
win_rest_invalid(wp->w_next);
}
}
/*
* If this is the last window and there is no status line, redraw the
* command line later.
*/
else
redraw_cmdline = TRUE;
return OK;
}
/*
* window 'wp' and everything after it is messed up, mark it for redraw
*/
void
win_rest_invalid(wp)
WIN *wp;
{
while (wp)
{
wp->w_lsize_valid = 0;
wp->w_redr_type = NOT_VALID;
wp->w_redr_status = TRUE;
wp = wp->w_next;
}
redraw_cmdline = TRUE;
}
/*
* The rest of the routines in this file perform screen manipulations. The
* given operation is performed physically on the screen. The corresponding
* change is also made to the internal screen image. In this way, the editor
* anticipates the effect of editing changes on the appearance of the screen.
* That way, when we call screenupdate a complete redraw isn't usually
* necessary. Another advantage is that we can keep adding code to anticipate
* screen changes, and in the meantime, everything still works.
*/
/*
* types for inserting or deleting lines
*/
#define USE_T_CAL 1
#define USE_T_CDL 2
#define USE_T_AL 3
#define USE_T_CE 4
#define USE_T_DL 5
#define USE_T_SR 6
#define USE_NL 7
#define USE_T_CD 8
/*
* insert lines on the screen and update NextScreen
* 'end' is the line after the scrolled part. Normally it is Rows.
* When scrolling region used 'off' is the offset from the top for the region.
* 'row' and 'end' are relative to the start of the region.
*
* return FAIL for failure, OK for success.
*/
static int
screen_ins_lines(off, row, line_count, end)
int off;
int row;
int line_count;
int end;
{
int i;
int j;
char_u *temp;
int cursor_row;
int type;
int result_empty;
/*
* FAIL if
* - there is no valid screen
* - the screen has to be redrawn completely
* - the line count is less than one
* - the line count is more than 'ttyscroll'
*/
if (!screen_valid(TRUE) || line_count <= 0 || line_count > p_ttyscroll)
return FAIL;
/*
* There are seven ways to insert lines:
* 1. Use T_CD (clear to end of display) if it exists and the result of
* the insert is just empty lines
* 2. Use T_CAL (insert multiple lines) if it exists and T_AL is not
* present or line_count > 1. It looks better if we do all the inserts
* at once.
* 3. Use T_CDL (delete multiple lines) if it exists and the result of the
* insert is just empty lines and T_CE is not present or line_count >
* 1.
* 4. Use T_AL (insert line) if it exists.
* 5. Use T_CE (erase line) if it exists and the result of the insert is
* just empty lines.
* 6. Use T_DL (delete line) if it exists and the result of the insert is
* just empty lines.
* 7. Use T_SR (scroll reverse) if it exists and inserting at row 0 and
* the 'da' flag is not set or we have clear line capability.
*
* Careful: In a hpterm scroll reverse doesn't work as expected, it moves
* the scrollbar for the window. It does have insert line, use that if it
* exists.
*/
result_empty = (row + line_count >= end);
if (*T_CD != NUL && result_empty)
type = USE_T_CD;
else if (*T_CAL != NUL && (line_count > 1 || *T_AL == NUL))
type = USE_T_CAL;
else if (*T_CDL != NUL && result_empty && (line_count > 1 || *T_CE == NUL))
type = USE_T_CDL;
else if (*T_AL != NUL)
type = USE_T_AL;
else if (*T_CE != NUL && result_empty)
type = USE_T_CE;
else if (*T_DL != NUL && result_empty)
type = USE_T_DL;
else if (*T_SR != NUL && row == 0 && (*T_DA == NUL || *T_CE))
type = USE_T_SR;
else
return FAIL;
/*
* For clearing the lines screen_del_lines is used. This will also take
* care of t_db if necessary.
*/
if (type == USE_T_CD || type == USE_T_CDL ||
type == USE_T_CE || type == USE_T_DL)
return screen_del_lines(off, row, line_count, end, FALSE);
/*
* If text is retained below the screen, first clear or delete as many
* lines at the bottom of the window as are about to be inserted so that
* the deleted lines won't later surface during a screen_del_lines.
*/
if (*T_DB)
screen_del_lines(off, end - line_count, line_count, end, FALSE);
if (*T_CSC != NUL) /* cursor relative to region */
cursor_row = row;
else
cursor_row = row + off;
/*
* Shift LinePointers line_count down to reflect the inserted lines.
* Clear the inserted lines in NextScreen.
*/
row += off;
end += off;
for (i = 0; i < line_count; ++i)
{
j = end - 1 - i;
temp = LinePointers[j];
while ((j -= line_count) >= row)
LinePointers[j + line_count] = LinePointers[j];
LinePointers[j + line_count] = temp;
lineclear(temp);
}
windgoto(cursor_row, 0);
if (type == USE_T_CAL)
{
OUTSTR(tgoto((char *)T_CAL, 0, line_count));
screen_start(); /* don't know where cursor is now */
}
else
{
for (i = 0; i < line_count; i++)
{
if (type == USE_T_AL)
{
if (i && cursor_row != 0)
windgoto(cursor_row, 0);
outstr(T_AL);
}
else /* type == USE_T_SR */
outstr(T_SR);
screen_start(); /* don't know where cursor is now */
}
}
/*
* With scroll-reverse and 'da' flag set we need to clear the lines that
* have been scrolled down into the region.
*/
if (type == USE_T_SR && *T_DA)
{
for (i = 0; i < line_count; ++i)
{
windgoto(off + i, 0);
outstr(T_CE);
screen_start(); /* don't know where cursor is now */
}
}
return OK;
}
/*
* delete lines on the screen and update NextScreen
* 'end' is the line after the scrolled part. Normally it is Rows.
* When scrolling region used 'off' is the offset from the top for the region.
* 'row' and 'end' are relative to the start of the region.
*
* Return OK for success, FAIL if the lines are not deleted.
*/
int
screen_del_lines(off, row, line_count, end, force)
int off;
int row;
int line_count;
int end;
int force; /* even when line_count > p_ttyscroll */
{
int j;
int i;
char_u *temp;
int cursor_row;
int cursor_end;
int result_empty; /* result is empty until end of region */
int can_delete; /* deleting line codes can be used */
int type;
/*
* FAIL if
* - there is no valid screen
* - the screen has to be redrawn completely
* - the line count is less than one
* - the line count is more than 'ttyscroll'
*/
if (!screen_valid(TRUE) || line_count <= 0 ||
(!force && line_count > p_ttyscroll))
return FAIL;
/*
* Check if the rest of the current region will become empty.
*/
result_empty = row + line_count >= end;
/*
* We can delete lines only when 'db' flag not set or when 'ce' option
* available.
*/
can_delete = (*T_DB == NUL || *T_CE);
/*
* There are four ways to delete lines:
* 1. Use T_CD if it exists and the result is empty.
* 2. Use newlines if row == 0 and count == 1 or T_CDL does not exist.
* 3. Use T_CDL (delete multiple lines) if it exists and line_count > 1 or
* none of the other ways work.
* 4. Use T_CE (erase line) if the result is empty.
* 5. Use T_DL (delete line) if it exists.
*/
if (*T_CD != NUL && result_empty)
type = USE_T_CD;
else if (row == 0 && (line_count == 1 || *T_CDL == NUL))
type = USE_NL;
else if (*T_CDL != NUL && line_count > 1 && can_delete)
type = USE_T_CDL;
else if (*T_CE != NUL && result_empty)
type = USE_T_CE;
else if (*T_DL != NUL && can_delete)
type = USE_T_DL;
else if (*T_CDL != NUL && can_delete)
type = USE_T_CDL;
else
return FAIL;
if (*T_CSC != NUL) /* cursor relative to region */
{
cursor_row = row;
cursor_end = end;
}
else
{
cursor_row = row + off;
cursor_end = end + off;
}
/*
* Now shift LinePointers line_count up to reflect the deleted lines.
* Clear the inserted lines in NextScreen.
*/
row += off;
end += off;
for (i = 0; i < line_count; ++i)
{
j = row + i;
temp = LinePointers[j];
while ((j += line_count) <= end - 1)
LinePointers[j - line_count] = LinePointers[j];
LinePointers[j - line_count] = temp;
lineclear(temp);
}
/* delete the lines */
if (type == USE_T_CD)
{
windgoto(cursor_row, 0);
outstr(T_CD);
screen_start(); /* don't know where cursor is now */
}
else if (type == USE_T_CDL)
{
windgoto(cursor_row, 0);
OUTSTR(tgoto((char *)T_CDL, 0, line_count));
screen_start(); /* don't know where cursor is now */
}
/*
* Deleting lines at top of the screen or scroll region: Just scroll
* the whole screen (scroll region) up by outputting newlines on the
* last line.
*/
else if (type == USE_NL)
{
windgoto(cursor_end - 1, 0);
for (i = line_count; --i >= 0; )
outchar('\n'); /* cursor will remain on same line */
}
else
{
for (i = line_count; --i >= 0; )
{
if (type == USE_T_DL)
{
windgoto(cursor_row, 0);
outstr(T_DL); /* delete a line */
}
else /* type == USE_T_CE */
{
windgoto(cursor_row + i, 0);
outstr(T_CE); /* erase a line */
}
screen_start(); /* don't know where cursor is now */
}
}
/*
* If the 'db' flag is set, we need to clear the lines that have been
* scrolled up at the bottom of the region.
*/
if (*T_DB && (type == USE_T_DL || type == USE_T_CDL))
{
for (i = line_count; i > 0; --i)
{
windgoto(cursor_end - i, 0);
outstr(T_CE); /* erase a line */
screen_start(); /* don't know where cursor is now */
}
}
return OK;
}
/*
* show the current mode and ruler
*
* If clear_cmdline is TRUE, clear the rest of the cmdline.
* If clear_cmdline is FALSE there may be a message there that needs to be
* cleared only if a mode is shown.
*/
void
showmode()
{
int need_clear = FALSE;
int do_mode = (p_smd &&
((State & INSERT) || restart_edit || VIsual_active));
if (do_mode || Recording)
{
if (emsg_on_display)
{
mch_delay(1000L, TRUE);
emsg_on_display = FALSE;
}
msg_didout = FALSE; /* never scroll up */
msg_col = 0;
gotocmdline(FALSE);
set_highlight('M'); /* Highlight mode */
if (do_mode)
{
start_highlight();
MSG_OUTSTR("--");
#ifdef INSERT_EXPAND
if (edit_submode != NULL) /* CTRL-X in Insert mode */
{
msg_outstr(edit_submode);
if (edit_submode_extra != NULL)
{
msg_outchar(' '); /* add a space in between */
if (edit_submode_highl)
{
stop_highlight();
set_highlight('r'); /* Highlight mode */
start_highlight();
}
msg_outstr(edit_submode_extra);
if (edit_submode_highl)
{
stop_highlight();
set_highlight('M'); /* Highlight mode */
start_highlight();
}
}
}
else
#endif
{
if (State == INSERT)
{
#ifdef RIGHTLEFT
if (p_ri)
MSG_OUTSTR(" REVERSE");
#endif
MSG_OUTSTR(" INSERT");
}
else if (State == REPLACE)
MSG_OUTSTR(" REPLACE");
else if (restart_edit == 'I')
MSG_OUTSTR(" (insert)");
else if (restart_edit == 'R')
MSG_OUTSTR(" (replace)");
#ifdef RIGHTLEFT
if (p_hkmap)
MSG_OUTSTR(" Hebrew");
#endif
if ((State & INSERT) && p_paste)
MSG_OUTSTR(" (paste)");
if (VIsual_active)
{
MSG_OUTSTR(" VISUAL");
if (VIsual_mode == Ctrl('V'))
MSG_OUTSTR(" BLOCK");
else if (VIsual_mode == 'V')
MSG_OUTSTR(" LINE");
}
}
MSG_OUTSTR(" --");
need_clear = TRUE;
}
if (Recording)
{
if (!need_clear)
start_highlight();
MSG_OUTSTR("recording");
need_clear = TRUE;
}
if (need_clear)
stop_highlight();
if (need_clear || clear_cmdline)
msg_clr_eos();
msg_didout = FALSE; /* overwrite this message */
msg_col = 0;
}
else if (clear_cmdline) /* just clear anything */
{
msg_row = cmdline_row;
msg_col = 0;
msg_clr_eos(); /* will reset clear_cmdline */
}
win_redr_ruler(lastwin, TRUE);
redraw_cmdline = FALSE;
}
/*
* delete mode message
*/
void
delmode()
{
if (Recording)
MSG("recording");
else
MSG("");
}
/*
* if ruler option is set: show current cursor position
* if always is FALSE, only print if position has changed
*/
void
showruler(always)
int always;
{
win_redr_ruler(curwin, always);
}
void
win_redr_ruler(wp, always)
WIN *wp;
int always;
{
static linenr_t old_lnum = 0;
static colnr_t old_col = 0;
char_u buffer[30];
int row;
int fillchar;
if (p_ru && (redraw_cmdline || always ||
wp->w_cursor.lnum != old_lnum || wp->w_virtcol != old_col))
{
cursor_off();
if (wp->w_status_height)
{
row = wp->w_winpos + wp->w_height;
if (set_highlight('s') == OK) /* can use highlighting */
{
fillchar = ' ';
start_highlight();
}
else
fillchar = '=';
}
else
{
row = Rows - 1;
fillchar = ' ';
}
/*
* Some sprintfs return the length, some return a pointer.
* To avoid portability problems we use strlen() here.
*/
sprintf((char *)buffer, "%ld,",
(wp->w_buffer->b_ml.ml_flags & ML_EMPTY) ?
0L :
(long)(wp->w_cursor.lnum));
/*
* Check if cursor.lnum is valid, since win_redr_ruler() may be called
* after deleting lines, before cursor.lnum is corrected.
*/
if (wp->w_cursor.lnum <= wp->w_buffer->b_ml.ml_line_count)
col_print(buffer + STRLEN(buffer),
!(State & INSERT) &&
*ml_get_buf(wp->w_buffer, wp->w_cursor.lnum, FALSE) == NUL ?
0 :
(int)wp->w_cursor.col + 1,
(int)wp->w_virtcol + 1);
screen_msg(buffer, row, ru_col);
screen_fill(row, row + 1, ru_col + (int)STRLEN(buffer),
(int)Columns, fillchar, fillchar);
old_lnum = wp->w_cursor.lnum;
old_col = wp->w_virtcol;
stop_highlight();
}
}
/*
* screen_valid - allocate screen buffers if size changed
* If "clear" is TRUE: clear screen if it has been resized.
* Returns TRUE if there is a valid screen to write to.
* Returns FALSE when starting up and screen not initialized yet.
*/
int
screen_valid(clear)
int clear;
{
screenalloc(clear); /* allocate screen buffers if size changed */
return (NextScreen != NULL);
}
#ifdef USE_MOUSE
/*
* Move the cursor to the specified row and column on the screen.
* Change current window if neccesary. Returns an integer with the
* CURSOR_MOVED bit set if the cursor has moved or unset otherwise.
*
* If flags has MOUSE_FOCUS, then the current window will not be changed, and
* if the mouse is outside the window then the text will scroll, or if the
* mouse was previously on a status line, then the status line may be dragged.
*
* If flags has MOUSE_MAY_VIS, then VIsual mode will be started before the
* cursor is moved unless the cursor was on a status line. Ignoring the
* CURSOR_MOVED bit, this function returns one of IN_UNKNOWN, IN_BUFFER, or
* IN_STATUS_LINE depending on where the cursor was clicked.
*
* If flags has MOUSE_DID_MOVE, nothing is done if the mouse didn't move since
* the last call.
*
* If flags has MOUSE_SETPOS, nothing is done, only the current position is
* remembered.
*/
int
jump_to_mouse(flags)
int flags;
{
static int on_status_line = 0; /* #lines below bottom of window */
static int prev_row = -1;
static int prev_col = -1;
WIN *wp, *old_curwin;
FPOS old_cursor;
int count;
int first;
int row = mouse_row;
int col = mouse_col;
mouse_past_bottom = FALSE;
mouse_past_eol = FALSE;
if ((flags & MOUSE_DID_MOVE) && prev_row == mouse_row &&
prev_col == mouse_col)
return IN_BUFFER; /* mouse pointer didn't move */
prev_row = mouse_row;
prev_col = mouse_col;
if ((flags & MOUSE_SETPOS))
return IN_BUFFER; /* mouse pointer didn't move */
old_curwin = curwin;
old_cursor = curwin->w_cursor;
if (!(flags & MOUSE_FOCUS))
{
if (row < 0 || col < 0) /* check if it makes sense */
return IN_UNKNOWN;
/* find the window where the row is in */
for (wp = firstwin; wp->w_next; wp = wp->w_next)
if (row < wp->w_next->w_winpos)
break;
/*
* winpos and height may change in win_enter()!
*/
row -= wp->w_winpos;
if (row >= wp->w_height) /* In (or below) status line */
on_status_line = row - wp->w_height + 1;
else
on_status_line = 0;
win_enter(wp, TRUE);
if (on_status_line) /* In (or below) status line */
{
/* Don't use start_arrow() if we're in the same window */
if (curwin == old_curwin)
return IN_STATUS_LINE;
else
return IN_STATUS_LINE | CURSOR_MOVED;
}
curwin->w_cursor.lnum = curwin->w_topline;
}
else if (on_status_line)
{
/* Drag the status line */
count = row - curwin->w_winpos - curwin->w_height + 1 - on_status_line;
win_drag_status_line(count);
return IN_STATUS_LINE; /* Cursor didn't move */
}
else /* keep_window_focus must be TRUE */
{
row -= curwin->w_winpos;
/*
* When clicking beyond the end of the window, scroll the screen.
* Scroll by however many rows outside the window we are.
*/
if (row < 0)
{
count = 0;
for (first = TRUE; curwin->w_topline > 1; --curwin->w_topline)
{
count += plines(curwin->w_topline - 1);
if (!first && count > -row)
break;
first = FALSE;
}
redraw_later(VALID);
row = 0;
}
else if (row >= curwin->w_height)
{
count = 0;
for (first = TRUE; curwin->w_topline < curbuf->b_ml.ml_line_count;
++curwin->w_topline)
{
count += plines(curwin->w_topline);
if (!first && count > row - curwin->w_height + 1)
break;
first = FALSE;
}
redraw_later(VALID);
row = curwin->w_height - 1;
}
curwin->w_cursor.lnum = curwin->w_topline;
}
#ifdef RIGHTLEFT
if (curwin->w_p_rl)
col = Columns - 1 - col;
#endif
if (curwin->w_p_nu) /* skip number in front of the line */
if ((col -= 8) < 0)
col = 0;
if (curwin->w_p_wrap) /* lines wrap */
{
while (row)
{
count = plines(curwin->w_cursor.lnum);
if (count > row)
{
col += row * Columns;
break;
}
if (curwin->w_cursor.lnum == curbuf->b_ml.ml_line_count)
{
mouse_past_bottom = TRUE;
break;
}
row -= count;
++curwin->w_cursor.lnum;
}
}
else /* lines don't wrap */
{
curwin->w_cursor.lnum += row;
if (curwin->w_cursor.lnum > curbuf->b_ml.ml_line_count)
{
curwin->w_cursor.lnum = curbuf->b_ml.ml_line_count;
mouse_past_bottom = TRUE;
}
col += curwin->w_leftcol;
}
curwin->w_curswant = col;
curwin->w_set_curswant = FALSE; /* May still have been TRUE */
if (coladvance(col) == FAIL)
{
/* Mouse click beyond end of line */
op_inclusive = TRUE;
mouse_past_eol = TRUE;
}
else
op_inclusive = FALSE;
if ((flags & MOUSE_MAY_VIS) && !VIsual_active)
{
start_visual_highlight();
VIsual = old_cursor;
VIsual_active = TRUE;
#ifdef USE_MOUSE
setmouse();
#endif
if (p_smd)
redraw_cmdline = TRUE; /* show visual mode later */
}
if (curwin == old_curwin && curwin->w_cursor.lnum == old_cursor.lnum &&
curwin->w_cursor.col == old_cursor.col)
return IN_BUFFER; /* Cursor has not moved */
return IN_BUFFER | CURSOR_MOVED; /* Cursor has moved */
}
#endif /* USE_MOUSE */
/*
* Redraw the screen later, with UpdateScreen(type).
* Set must_redraw only of not already set to a higher value.
* e.g. if must_redraw is CLEAR, type == NOT_VALID will do nothing.
*/
void
redraw_later(type)
int type;
{
if (must_redraw < type)
must_redraw = type;
}
