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drawscreen.c
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/* vi:set ts=8 sts=4 sw=4 noet:
*
* 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.
* See README.txt for an overview of the Vim source code.
*/
/*
* drawscreen.c: Code for updating all the windows on the screen.
* This is the top level, drawline.c is the middle and screen.c the lower
* level.
*
* update_screen() is the function that updates all windows and status lines.
* It is called form the main loop when must_redraw is non-zero. It may be
* called from other places when an immediate screen update is needed.
*
* The part of the buffer that is displayed in a window is set with:
* - w_topline (first buffer line in window)
* - w_topfill (filler lines above the first line)
* - w_leftcol (leftmost window cell in window),
* - w_skipcol (skipped window cells of first line)
*
* Commands that only move the cursor around in a window, do not need to take
* action to update the display. The main loop will check if w_topline is
* valid and update it (scroll the window) when needed.
*
* Commands that scroll a window change w_topline and must call
* check_cursor() to move the cursor into the visible part of the window, and
* call redraw_later(UPD_VALID) to have the window displayed by update_screen()
* later.
*
* Commands that change text in the buffer must call changed_bytes() or
* changed_lines() to mark the area that changed and will require updating
* later. The main loop will call update_screen(), which will update each
* window that shows the changed buffer. This assumes text above the change
* can remain displayed as it is. Text after the change may need updating for
* scrolling, folding and syntax highlighting.
*
* Commands that change how a window is displayed (e.g., setting 'list') or
* invalidate the contents of a window in another way (e.g., change fold
* settings), must call redraw_later(UPD_NOT_VALID) to have the whole window
* redisplayed by update_screen() later.
*
* Commands that change how a buffer is displayed (e.g., setting 'tabstop')
* must call redraw_curbuf_later(UPD_NOT_VALID) to have all the windows for the
* buffer redisplayed by update_screen() later.
*
* Commands that change highlighting and possibly cause a scroll too must call
* redraw_later(UPD_SOME_VALID) to update the whole window but still use
* scrolling to avoid redrawing everything. But the length of displayed lines
* must not change, use UPD_NOT_VALID then.
*
* Commands that move the window position must call redraw_later(UPD_NOT_VALID).
* TODO: should minimize redrawing by scrolling when possible.
*
* Commands that change everything (e.g., resizing the screen) must call
* redraw_all_later(UPD_NOT_VALID) or redraw_all_later(UPD_CLEAR).
*
* Things that are handled indirectly:
* - When messages scroll the screen up, msg_scrolled will be set and
* update_screen() called to redraw.
*/
#include "vim.h"
static void win_update(win_T *wp);
#ifdef FEAT_STL_OPT
static void redraw_custom_statusline(win_T *wp);
#endif
#if defined(FEAT_SEARCH_EXTRA) || defined(FEAT_CLIPBOARD)
static int did_update_one_window;
#endif
/*
* Based on the current value of curwin->w_topline, transfer a screenfull
* of stuff from Filemem to ScreenLines[], and update curwin->w_botline.
* Return OK when the screen was updated, FAIL if it was not done.
*/
int
update_screen(int type_arg)
{
int type = type_arg;
win_T *wp;
static int did_intro = FALSE;
#ifdef FEAT_GUI
int did_one = FALSE;
int did_undraw = FALSE;
int gui_cursor_col = 0;
int gui_cursor_row = 0;
#endif
int no_update = FALSE;
int save_pum_will_redraw = pum_will_redraw;
// Don't do anything if the screen structures are (not yet) valid.
if (!screen_valid(TRUE))
return FAIL;
if (type == UPD_VALID_NO_UPDATE)
{
no_update = TRUE;
type = 0;
}
#ifdef FEAT_EVAL
{
buf_T *buf;
// Before updating the screen, notify any listeners of changed text.
FOR_ALL_BUFFERS(buf)
invoke_listeners(buf);
}
#endif
#ifdef FEAT_DIFF
// May have postponed updating diffs.
if (need_diff_redraw)
diff_redraw(TRUE);
#endif
if (must_redraw)
{
if (type < must_redraw) // use maximal type
type = must_redraw;
// must_redraw is reset here, so that when we run into some weird
// reason to redraw while busy redrawing (e.g., asynchronous
// scrolling), or update_topline() in win_update() will cause a
// scroll, the screen will be redrawn later or in win_update().
must_redraw = 0;
}
// May need to update w_lines[].
if (curwin->w_lines_valid == 0 && type < UPD_NOT_VALID
#ifdef FEAT_TERMINAL
&& !term_do_update_window(curwin)
#endif
)
type = UPD_NOT_VALID;
// Postpone the redrawing when it's not needed and when being called
// recursively.
if (!redrawing() || updating_screen)
{
redraw_later(type); // remember type for next time
must_redraw = type;
if (type > UPD_INVERTED_ALL)
curwin->w_lines_valid = 0; // don't use w_lines[].wl_size now
return FAIL;
}
updating_screen = TRUE;
#ifdef FEAT_PROP_POPUP
// Update popup_mask if needed. This may set w_redraw_top and w_redraw_bot
// in some windows.
may_update_popup_mask(type);
#endif
#ifdef FEAT_SYN_HL
++display_tick; // let syntax code know we're in a next round of
// display updating
#endif
if (no_update)
++no_win_do_lines_ins;
// if the screen was scrolled up when displaying a message, scroll it down
if (msg_scrolled)
{
clear_cmdline = TRUE;
if (type != UPD_CLEAR)
{
if (msg_scrolled > Rows - 5) // redrawing is faster
{
type = UPD_NOT_VALID;
redraw_as_cleared();
}
else
{
check_for_delay(FALSE);
if (screen_ins_lines(0, 0, msg_scrolled, (int)Rows, 0, NULL)
== FAIL)
{
type = UPD_NOT_VALID;
redraw_as_cleared();
}
FOR_ALL_WINDOWS(wp)
{
if (wp->w_winrow < msg_scrolled)
{
if (W_WINROW(wp) + wp->w_height > msg_scrolled
&& wp->w_redr_type < UPD_REDRAW_TOP
&& wp->w_lines_valid > 0
&& wp->w_topline == wp->w_lines[0].wl_lnum)
{
wp->w_upd_rows = msg_scrolled - W_WINROW(wp);
wp->w_redr_type = UPD_REDRAW_TOP;
}
else
{
wp->w_redr_type = UPD_NOT_VALID;
if (W_WINROW(wp) + wp->w_height
+ wp->w_status_height <= msg_scrolled)
wp->w_redr_status = TRUE;
}
}
}
if (!no_update)
redraw_cmdline = TRUE;
redraw_tabline = TRUE;
}
}
msg_scrolled = 0;
need_wait_return = FALSE;
}
// reset cmdline_row now (may have been changed temporarily)
compute_cmdrow();
// Check for changed highlighting
if (need_highlight_changed)
highlight_changed();
if (type == UPD_CLEAR) // first clear screen
{
screenclear(); // will reset clear_cmdline
type = UPD_NOT_VALID;
// must_redraw may be set indirectly, avoid another redraw later
must_redraw = 0;
}
if (clear_cmdline) // going to clear cmdline (done below)
check_for_delay(FALSE);
#ifdef FEAT_LINEBREAK
// Force redraw when width of 'number' or 'relativenumber' column
// changes.
if (curwin->w_redr_type < UPD_NOT_VALID
&& curwin->w_nrwidth != ((curwin->w_p_nu || curwin->w_p_rnu)
? number_width(curwin) : 0))
curwin->w_redr_type = UPD_NOT_VALID;
#endif
// Only start redrawing if there is really something to do.
if (type == UPD_INVERTED)
update_curswant();
if (curwin->w_redr_type < type
&& !((type == UPD_VALID
&& curwin->w_lines[0].wl_valid
#ifdef FEAT_DIFF
&& curwin->w_topfill == curwin->w_old_topfill
&& curwin->w_botfill == curwin->w_old_botfill
#endif
&& curwin->w_topline == curwin->w_lines[0].wl_lnum)
|| (type == UPD_INVERTED
&& VIsual_active
&& curwin->w_old_cursor_lnum == curwin->w_cursor.lnum
&& curwin->w_old_visual_mode == VIsual_mode
&& (curwin->w_valid & VALID_VIRTCOL)
&& curwin->w_old_curswant == curwin->w_curswant)
))
curwin->w_redr_type = type;
// Redraw the tab pages line if needed.
if (redraw_tabline || type >= UPD_NOT_VALID)
draw_tabline();
#ifdef FEAT_SYN_HL
// Correct stored syntax highlighting info for changes in each displayed
// buffer. Each buffer must only be done once.
FOR_ALL_WINDOWS(wp)
{
if (wp->w_buffer->b_mod_set)
{
win_T *wwp;
// Check if we already did this buffer.
for (wwp = firstwin; wwp != wp; wwp = wwp->w_next)
if (wwp->w_buffer == wp->w_buffer)
break;
if (wwp == wp && syntax_present(wp))
syn_stack_apply_changes(wp->w_buffer);
}
}
#endif
if (pum_redraw_in_same_position())
// Avoid flicker if the popup menu is going to be redrawn in the same
// position.
pum_will_redraw = TRUE;
// Go from top to bottom through the windows, redrawing the ones that need
// it.
#if defined(FEAT_SEARCH_EXTRA) || defined(FEAT_CLIPBOARD)
did_update_one_window = FALSE;
#endif
#ifdef FEAT_SEARCH_EXTRA
screen_search_hl.rm.regprog = NULL;
#endif
FOR_ALL_WINDOWS(wp)
{
if (wp->w_redr_type != 0)
{
cursor_off();
#ifdef FEAT_GUI
if (!did_one)
{
did_one = TRUE;
// Remove the cursor before starting to do anything, because
// scrolling may make it difficult to redraw the text under
// it.
// Also remove the cursor if it needs to be hidden due to an
// ongoing cursor-less sleep.
if (gui.in_use && (wp == curwin || cursor_is_sleeping()))
{
gui_cursor_col = gui.cursor_col;
gui_cursor_row = gui.cursor_row;
gui_undraw_cursor();
did_undraw = TRUE;
}
}
#endif
win_update(wp);
}
// redraw status line after the window to minimize cursor movement
if (wp->w_redr_status)
{
cursor_off();
win_redr_status(wp, TRUE); // any popup menu will be redrawn below
}
}
#if defined(FEAT_SEARCH_EXTRA)
end_search_hl();
#endif
// May need to redraw the popup menu.
pum_will_redraw = save_pum_will_redraw;
pum_may_redraw();
// Reset b_mod_set flags. Going through all windows is probably faster
// than going through all buffers (there could be many buffers).
FOR_ALL_WINDOWS(wp)
wp->w_buffer->b_mod_set = FALSE;
#ifdef FEAT_PROP_POPUP
// Display popup windows on top of the windows and command line.
update_popups(win_update);
#endif
#ifdef FEAT_TERMINAL
FOR_ALL_WINDOWS(wp)
// If this window contains a terminal, after redrawing all windows, the
// dirty row range can be reset.
term_did_update_window(wp);
#endif
after_updating_screen(TRUE);
// Clear or redraw the command line. Done last, because scrolling may
// mess up the command line.
if (clear_cmdline || redraw_cmdline || redraw_mode)
showmode();
if (no_update)
--no_win_do_lines_ins;
// May put up an introductory message when not editing a file
if (!did_intro)
maybe_intro_message();
did_intro = TRUE;
#ifdef FEAT_GUI
// Redraw the cursor and update the scrollbars when all screen updating is
// done.
if (gui.in_use)
{
if (did_undraw && !gui_mch_is_blink_off())
{
mch_disable_flush();
out_flush(); // required before updating the cursor
mch_enable_flush();
// Put the GUI position where the cursor was, gui_update_cursor()
// uses that.
gui.col = gui_cursor_col;
gui.row = gui_cursor_row;
gui.col = mb_fix_col(gui.col, gui.row);
gui_update_cursor(FALSE, FALSE);
gui_may_flush();
screen_cur_col = gui.col;
screen_cur_row = gui.row;
}
else
out_flush();
gui_update_scrollbars(FALSE);
}
#endif
return OK;
}
/*
* Return the row for drawing the statusline and the ruler of window "wp".
*/
int
statusline_row(win_T *wp)
{
#if defined(FEAT_PROP_POPUP)
// If the window is really zero height the winbar isn't displayed.
if (wp->w_frame->fr_height == wp->w_status_height && !popup_is_popup(wp))
return wp->w_winrow;
#endif
return W_WINROW(wp) + wp->w_height;
}
/*
* Redraw the status line of window wp.
*
* If inversion is possible we use it. Else '=' characters are used.
* If "ignore_pum" is TRUE, also redraw statusline when the popup menu is
* displayed.
*/
void
win_redr_status(win_T *wp, int ignore_pum UNUSED)
{
int row;
char_u *p;
int len;
int fillchar;
int attr;
int this_ru_col;
static int busy = FALSE;
// It's possible to get here recursively when 'statusline' (indirectly)
// invokes ":redrawstatus". Simply ignore the call then.
if (busy)
return;
busy = TRUE;
row = statusline_row(wp);
wp->w_redr_status = FALSE;
if (wp->w_status_height == 0)
{
// no status line, can only be last window
redraw_cmdline = TRUE;
}
else if (!redrawing()
// don't update status line when popup menu is visible and may be
// drawn over it, unless it will be redrawn later
|| (!ignore_pum && pum_visible()))
{
// Don't redraw right now, do it later.
wp->w_redr_status = TRUE;
}
#ifdef FEAT_STL_OPT
else if (*p_stl != NUL || *wp->w_p_stl != NUL)
{
// redraw custom status line
redraw_custom_statusline(wp);
}
#endif
else
{
fillchar = fillchar_status(&attr, wp);
get_trans_bufname(wp->w_buffer);
p = NameBuff;
len = (int)STRLEN(p);
if ((bt_help(wp->w_buffer)
#ifdef FEAT_QUICKFIX
|| wp->w_p_pvw
#endif
|| bufIsChanged(wp->w_buffer)
|| wp->w_buffer->b_p_ro)
&& len < MAXPATHL - 1)
*(p + len++) = ' ';
if (bt_help(wp->w_buffer))
{
vim_snprintf((char *)p + len, MAXPATHL - len, "%s", _("[Help]"));
len += (int)STRLEN(p + len);
}
#ifdef FEAT_QUICKFIX
if (wp->w_p_pvw)
{
vim_snprintf((char *)p + len, MAXPATHL - len, "%s", _("[Preview]"));
len += (int)STRLEN(p + len);
}
#endif
if (bufIsChanged(wp->w_buffer) && !bt_terminal(wp->w_buffer))
{
vim_snprintf((char *)p + len, MAXPATHL - len, "%s", "[+]");
len += (int)STRLEN(p + len);
}
if (wp->w_buffer->b_p_ro)
{
vim_snprintf((char *)p + len, MAXPATHL - len, "%s", _("[RO]"));
len += (int)STRLEN(p + len);
}
this_ru_col = ru_col - (Columns - wp->w_width);
if (this_ru_col < (wp->w_width + 1) / 2)
this_ru_col = (wp->w_width + 1) / 2;
if (this_ru_col <= 1)
{
p = (char_u *)"<"; // No room for file name!
len = 1;
}
else if (has_mbyte)
{
int clen = 0, i;
// Count total number of display cells.
clen = mb_string2cells(p, -1);
// Find first character that will fit.
// Going from start to end is much faster for DBCS.
for (i = 0; p[i] != NUL && clen >= this_ru_col - 1;
i += (*mb_ptr2len)(p + i))
clen -= (*mb_ptr2cells)(p + i);
len = clen;
if (i > 0)
{
p = p + i - 1;
*p = '<';
++len;
}
}
else if (len > this_ru_col - 1)
{
p += len - (this_ru_col - 1);
*p = '<';
len = this_ru_col - 1;
}
screen_puts(p, row, wp->w_wincol, attr);
screen_fill(row, row + 1, len + wp->w_wincol,
this_ru_col + wp->w_wincol, fillchar, fillchar, attr);
if (get_keymap_str(wp, (char_u *)"<%s>", NameBuff, MAXPATHL)
&& (this_ru_col - len) > (int)(STRLEN(NameBuff) + 1))
screen_puts(NameBuff, row, (int)(this_ru_col - STRLEN(NameBuff)
- 1 + wp->w_wincol), attr);
win_redr_ruler(wp, TRUE, ignore_pum);
// Draw the 'showcmd' information if 'showcmdloc' == "statusline".
if (p_sc && *p_sloc == 's')
{
int width = MIN(10, this_ru_col - len - 2);
if (width > 0)
screen_puts_len(showcmd_buf, width, row,
wp->w_wincol + this_ru_col - width - 1, attr);
}
}
/*
* May need to draw the character below the vertical separator.
*/
if (wp->w_vsep_width != 0 && wp->w_status_height != 0 && redrawing())
{
if (stl_connected(wp))
fillchar = fillchar_status(&attr, wp);
else
fillchar = fillchar_vsep(&attr, wp);
screen_putchar(fillchar, row, W_ENDCOL(wp), attr);
}
busy = FALSE;
}
#ifdef FEAT_STL_OPT
/*
* Redraw the status line according to 'statusline' and take care of any
* errors encountered.
*/
static void
redraw_custom_statusline(win_T *wp)
{
static int entered = FALSE;
// When called recursively return. This can happen when the statusline
// contains an expression that triggers a redraw.
if (entered)
return;
entered = TRUE;
win_redr_custom(wp, FALSE);
entered = FALSE;
}
#endif
/*
* Show current status info in ruler and various other places
* If always is FALSE, only show ruler if position has changed.
*/
void
showruler(int always)
{
if (!always && !redrawing())
return;
if (pum_visible())
{
// Don't redraw right now, do it later.
curwin->w_redr_status = TRUE;
return;
}
#if defined(FEAT_STL_OPT)
if ((*p_stl != NUL || *curwin->w_p_stl != NUL) && curwin->w_status_height)
redraw_custom_statusline(curwin);
else
#endif
win_redr_ruler(curwin, always, FALSE);
if (need_maketitle
#ifdef FEAT_STL_OPT
|| (p_icon && (stl_syntax & STL_IN_ICON))
|| (p_title && (stl_syntax & STL_IN_TITLE))
#endif
)
maketitle();
// Redraw the tab pages line if needed.
if (redraw_tabline)
draw_tabline();
}
void
win_redr_ruler(win_T *wp, int always, int ignore_pum)
{
#define RULER_BUF_LEN 70
char_u buffer[RULER_BUF_LEN];
int row;
int fillchar;
int attr;
int empty_line = FALSE;
colnr_T virtcol;
int i;
size_t len;
int o;
int this_ru_col;
int off = 0;
int width;
// If 'ruler' off don't do anything
if (!p_ru)
return;
/*
* 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)
return;
// Don't draw the ruler while doing insert-completion, it might overwrite
// the (long) mode message.
if (wp == lastwin && lastwin->w_status_height == 0)
if (edit_submode != NULL)
return;
// Don't draw the ruler when the popup menu is visible, it may overlap.
// Except when the popup menu will be redrawn anyway.
if (!ignore_pum && pum_visible())
return;
#ifdef FEAT_STL_OPT
if (*p_ruf)
{
win_redr_custom(wp, TRUE);
return;
}
#endif
/*
* Check if not in Insert mode and the line is empty (will show "0-1").
*/
if ((State & MODE_INSERT) == 0
&& *ml_get_buf(wp->w_buffer, wp->w_cursor.lnum, FALSE) == NUL)
empty_line = TRUE;
/*
* Only draw the ruler when something changed.
*/
validate_virtcol_win(wp);
if ( redraw_cmdline
|| always
|| wp->w_cursor.lnum != wp->w_ru_cursor.lnum
|| wp->w_cursor.col != wp->w_ru_cursor.col
|| wp->w_virtcol != wp->w_ru_virtcol
|| wp->w_cursor.coladd != wp->w_ru_cursor.coladd
|| wp->w_topline != wp->w_ru_topline
|| wp->w_buffer->b_ml.ml_line_count != wp->w_ru_line_count
#ifdef FEAT_DIFF
|| wp->w_topfill != wp->w_ru_topfill
#endif
|| empty_line != wp->w_ru_empty)
{
cursor_off();
if (wp->w_status_height)
{
row = statusline_row(wp);
fillchar = fillchar_status(&attr, wp);
off = wp->w_wincol;
width = wp->w_width;
}
else
{
row = Rows - 1;
fillchar = ' ';
attr = 0;
width = Columns;
off = 0;
}
// In list mode virtcol needs to be recomputed
virtcol = wp->w_virtcol;
if (wp->w_p_list && wp->w_lcs_chars.tab1 == NUL)
{
wp->w_p_list = FALSE;
getvvcol(wp, &wp->w_cursor, NULL, &virtcol, NULL);
wp->w_p_list = TRUE;
}
/*
* Some sprintfs return the length, some return a pointer.
* To avoid portability problems we use strlen() here.
*/
vim_snprintf((char *)buffer, RULER_BUF_LEN, "%ld,",
(wp->w_buffer->b_ml.ml_flags & ML_EMPTY)
? 0L
: (long)(wp->w_cursor.lnum));
len = STRLEN(buffer);
col_print(buffer + len, RULER_BUF_LEN - len,
empty_line ? 0 : (int)wp->w_cursor.col + 1,
(int)virtcol + 1);
/*
* Add a "50%" if there is room for it.
* On the last line, don't print in the last column (scrolls the
* screen up on some terminals).
*/
i = (int)STRLEN(buffer);
get_rel_pos(wp, buffer + i + 1, RULER_BUF_LEN - i - 1);
o = i + vim_strsize(buffer + i + 1);
if (wp->w_status_height == 0) // can't use last char of screen
++o;
this_ru_col = ru_col - (Columns - width);
if (this_ru_col < 0)
this_ru_col = 0;
// Never use more than half the window/screen width, leave the other
// half for the filename.
if (this_ru_col < (width + 1) / 2)
this_ru_col = (width + 1) / 2;
if (this_ru_col + o < width)
{
// need at least 3 chars left for get_rel_pos() + NUL
while (this_ru_col + o < width && RULER_BUF_LEN > i + 4)
{
if (has_mbyte)
i += (*mb_char2bytes)(fillchar, buffer + i);
else
buffer[i++] = fillchar;
++o;
}
get_rel_pos(wp, buffer + i, RULER_BUF_LEN - i);
}
// Truncate at window boundary.
if (has_mbyte)
{
o = 0;
for (i = 0; buffer[i] != NUL; i += (*mb_ptr2len)(buffer + i))
{
o += (*mb_ptr2cells)(buffer + i);
if (this_ru_col + o > width)
{
buffer[i] = NUL;
break;
}
}
}
else if (this_ru_col + (int)STRLEN(buffer) > width)
buffer[width - this_ru_col] = NUL;
screen_puts(buffer, row, this_ru_col + off, attr);
i = redraw_cmdline;
screen_fill(row, row + 1,
this_ru_col + off + (int)STRLEN(buffer),
(off + width),
fillchar, fillchar, attr);
// don't redraw the cmdline because of showing the ruler
redraw_cmdline = i;
wp->w_ru_cursor = wp->w_cursor;
wp->w_ru_virtcol = wp->w_virtcol;
wp->w_ru_empty = empty_line;
wp->w_ru_topline = wp->w_topline;
wp->w_ru_line_count = wp->w_buffer->b_ml.ml_line_count;
#ifdef FEAT_DIFF
wp->w_ru_topfill = wp->w_topfill;
#endif
}
}
/*
* To be called when "updating_screen" was set before and now the postponed
* side effects may take place.
*/
void
after_updating_screen(int may_resize_shell UNUSED)
{
updating_screen = FALSE;
#ifdef FEAT_GUI
if (may_resize_shell)
gui_may_resize_shell();
#endif
#ifdef FEAT_TERMINAL
term_check_channel_closed_recently();
#endif
#ifdef HAVE_DROP_FILE
// If handle_drop() was called while updating_screen was TRUE need to
// handle the drop now.
handle_any_postponed_drop();
#endif
}
/*
* Update all windows that are editing the current buffer.
*/
void
update_curbuf(int type)
{
redraw_curbuf_later(type);
update_screen(type);
}
#if defined(FEAT_MENU) || defined(FEAT_FOLDING)
/*
* Copy "text" to ScreenLines using "attr".
* Returns the next screen column.
*/
static int
text_to_screenline(win_T *wp, char_u *text, int col)
{
int off = (int)(current_ScreenLine - ScreenLines);
if (has_mbyte)
{
int cells;
int u8c, u8cc[MAX_MCO];
int i;
int idx;
int c_len;
char_u *p;
# ifdef FEAT_ARABIC
int prev_c = 0; // previous Arabic character
int prev_c1 = 0; // first composing char for prev_c
# endif
# ifdef FEAT_RIGHTLEFT
if (wp->w_p_rl)
idx = off;
else
# endif
idx = off + col;
// Store multibyte characters in ScreenLines[] et al. correctly.
for (p = text; *p != NUL; )
{
cells = (*mb_ptr2cells)(p);
c_len = (*mb_ptr2len)(p);
if (col + cells > wp->w_width
# ifdef FEAT_RIGHTLEFT
- (wp->w_p_rl ? col : 0)
# endif
)
break;
ScreenLines[idx] = *p;
if (enc_utf8)
{
u8c = utfc_ptr2char(p, u8cc);
if (*p < 0x80 && u8cc[0] == 0)
{
ScreenLinesUC[idx] = 0;
#ifdef FEAT_ARABIC
prev_c = u8c;
#endif
}
else
{
#ifdef FEAT_ARABIC
if (p_arshape && !p_tbidi && ARABIC_CHAR(u8c))
{
// Do Arabic shaping.
int pc, pc1, nc;
int pcc[MAX_MCO];
int firstbyte = *p;
// The idea of what is the previous and next
// character depends on 'rightleft'.
if (wp->w_p_rl)
{
pc = prev_c;
pc1 = prev_c1;
nc = utf_ptr2char(p + c_len);
prev_c1 = u8cc[0];
}
else
{
pc = utfc_ptr2char(p + c_len, pcc);
nc = prev_c;
pc1 = pcc[0];
}
prev_c = u8c;
u8c = arabic_shape(u8c, &firstbyte, &u8cc[0],
pc, pc1, nc);
ScreenLines[idx] = firstbyte;
}
else
prev_c = u8c;
#endif
// Non-BMP character: display as ? or fullwidth ?.
ScreenLinesUC[idx] = u8c;
for (i = 0; i < Screen_mco; ++i)
{
ScreenLinesC[i][idx] = u8cc[i];
if (u8cc[i] == 0)
break;
}
}
if (cells > 1)
ScreenLines[idx + 1] = 0;
}
else if (enc_dbcs == DBCS_JPNU && *p == 0x8e)
// double-byte single width character
ScreenLines2[idx] = p[1];
else if (cells > 1)
// double-width character
ScreenLines[idx + 1] = p[1];
col += cells;
idx += cells;
p += c_len;
}
}
else
{
int len = (int)STRLEN(text);
if (len > wp->w_width - col)
len = wp->w_width - col;
if (len > 0)
{
#ifdef FEAT_RIGHTLEFT
if (wp->w_p_rl)
mch_memmove(current_ScreenLine, text, len);
else
#endif
mch_memmove(current_ScreenLine + col, text, len);
col += len;
}
}
return col;
}
#endif
#ifdef FEAT_MENU
/*
* Draw the window toolbar.
*/
static void
redraw_win_toolbar(win_T *wp)
{
vimmenu_T *menu;
int item_idx = 0;
int item_count = 0;
int col = 0;
int next_col;
int off = (int)(current_ScreenLine - ScreenLines);
int fill_attr = syn_name2attr((char_u *)"ToolbarLine");
int button_attr = syn_name2attr((char_u *)"ToolbarButton");
vim_free(wp->w_winbar_items);
FOR_ALL_CHILD_MENUS(wp->w_winbar, menu)
++item_count;
wp->w_winbar_items = ALLOC_CLEAR_MULT(winbar_item_T, item_count + 1);
// TODO: use fewer spaces if there is not enough room
for (menu = wp->w_winbar->children;
menu != NULL && col < wp->w_width; menu = menu->next)
{
space_to_screenline(off + col, fill_attr);
if (++col >= wp->w_width)
break;
if (col > 1)
{
space_to_screenline(off + col, fill_attr);
if (++col >= wp->w_width)