patch 8.1.2057: the screen.c file is much too bigv8.1.2057

Problem:    The screen.c file is much too big.
Solution:   Split it in three parts. (Yegappan Lakshmanan, closes #4943)

1 files changed, 59 insertions, 6452 deletions

diff --git a/src/screen.c b/src/screen.c
index 4d976fd686..0120d11eb3 100644
--- a/src/screen.c
+++ b/src/screen.c
@@ -8,7 +8,7 @@
  */
 
 /*
- * screen.c: code for displaying on the screen
+ * screen.c: Lower level code for displaying on the screen.
  *
  * Output to the screen (console, terminal emulator or GUI window) is minimized
  * by remembering what is already on the screen, and only updating the parts
@@ -35,110 +35,15 @@
  *
  * The screen_*() functions write to the screen and handle updating
  * ScreenLines[].
- *
- * 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(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(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(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(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 NOT_VALID then.
- *
- * Commands that move the window position must call redraw_later(NOT_VALID).
- * TODO: should minimize redrawing by scrolling when possible.
- *
- * Commands that change everything (e.g., resizing the screen) must call
- * redraw_all_later(NOT_VALID) or redraw_all_later(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"
 
-#define MB_FILLER_CHAR '<'  /* character used when a double-width character
-			     * doesn't fit. */
-
 /*
  * The attributes that are actually active for writing to the screen.
  */
 static int	screen_attr = 0;
 
-/*
- * Positioning the cursor is reduced by remembering the last position.
- * Mostly used by windgoto() and screen_char().
- */
-static int	screen_cur_row, screen_cur_col;	/* last known cursor position */
-
-#ifdef FEAT_SEARCH_EXTRA
-static match_T search_hl;	// used for 'hlsearch' highlight matching
-#endif
-
-#ifdef FEAT_FOLDING
-static foldinfo_T win_foldinfo;	/* info for 'foldcolumn' */
-static int compute_foldcolumn(win_T *wp, int col);
-#endif
-
-/* Flag that is set when drawing for a callback, not from the main command
- * loop. */
-static int redrawing_for_callback = 0;
-
-/*
- * Buffer for one screen line (characters and attributes).
- */
-static schar_T	*current_ScreenLine;
-
-static void win_update(win_T *wp);
-static void win_redr_status(win_T *wp, int ignore_pum);
-static void win_draw_end(win_T *wp, int c1, int c2, int draw_margin, int row, int endrow, hlf_T hl);
-#ifdef FEAT_FOLDING
-static void fold_line(win_T *wp, long fold_count, foldinfo_T *foldinfo, linenr_T lnum, int row);
-static void fill_foldcolumn(char_u *p, win_T *wp, int closed, linenr_T lnum);
-static void copy_text_attr(int off, char_u *buf, int len, int attr);
-#endif
-static int win_line(win_T *, linenr_T, int, int, int nochange, int number_only);
-static void draw_vsep_win(win_T *wp, int row);
-#ifdef FEAT_STL_OPT
-static void redraw_custom_statusline(win_T *wp);
-#endif
-#ifdef FEAT_SEARCH_EXTRA
-static void start_search_hl(void);
-static void end_search_hl(void);
-#endif
-static void screen_char(unsigned off, int row, int col);
 static void screen_char_2(unsigned off, int row, int col);
 static void screenclear2(void);
 static void lineclear(unsigned off, int width, int attr);
@@ -147,762 +52,10 @@ static int win_do_lines(win_T *wp, int row, int line_count, int mayclear, int de
 static void win_rest_invalid(win_T *wp);
 static void msg_pos_mode(void);
 static void recording_mode(int attr);
-static int fillchar_status(int *attr, win_T *wp);
-static int fillchar_vsep(int *attr);
-#ifdef FEAT_MENU
-static void redraw_win_toolbar(win_T *wp);
-#endif
-#ifdef FEAT_STL_OPT
-static void win_redr_custom(win_T *wp, int draw_ruler);
-#endif
-#ifdef FEAT_CMDL_INFO
-static void win_redr_ruler(win_T *wp, int always, int ignore_pum);
-#endif
-#ifdef FEAT_SYN_HL
-static void margin_columns_win(win_T *wp, int *left_col, int *right_col);
-#endif
 
 /* Ugly global: overrule attribute used by screen_char() */
 static int screen_char_attr = 0;
 
-#ifdef FEAT_RIGHTLEFT
-# define HAS_RIGHTLEFT(x) x
-#else
-# define HAS_RIGHTLEFT(x) FALSE
-#endif
-
-// flags for screen_line()
-#define SLF_RIGHTLEFT	1
-#define SLF_POPUP	2
-
-/*
- * Redraw the current window later, with update_screen(type).
- * Set must_redraw only if not already set to a higher value.
- * E.g. if must_redraw is CLEAR, type NOT_VALID will do nothing.
- */
-    void
-redraw_later(int type)
-{
-    redraw_win_later(curwin, type);
-}
-
-    void
-redraw_win_later(
-    win_T	*wp,
-    int		type)
-{
-    if (!exiting && wp->w_redr_type < type)
-    {
-	wp->w_redr_type = type;
-	if (type >= NOT_VALID)
-	    wp->w_lines_valid = 0;
-	if (must_redraw < type)	/* must_redraw is the maximum of all windows */
-	    must_redraw = type;
-    }
-}
-
-/*
- * Force a complete redraw later.  Also resets the highlighting.  To be used
- * after executing a shell command that messes up the screen.
- */
-    void
-redraw_later_clear(void)
-{
-    redraw_all_later(CLEAR);
-#ifdef FEAT_GUI
-    if (gui.in_use)
-	/* Use a code that will reset gui.highlight_mask in
-	 * gui_stop_highlight(). */
-	screen_attr = HL_ALL + 1;
-    else
-#endif
-	/* Use attributes that is very unlikely to appear in text. */
-	screen_attr = HL_BOLD | HL_UNDERLINE | HL_INVERSE | HL_STRIKETHROUGH;
-}
-
-/*
- * Mark all windows to be redrawn later.
- */
-    void
-redraw_all_later(int type)
-{
-    win_T	*wp;
-
-    FOR_ALL_WINDOWS(wp)
-	redraw_win_later(wp, type);
-    // This may be needed when switching tabs.
-    if (must_redraw < type)
-	must_redraw = type;
-}
-
-/*
- * Mark all windows that are editing the current buffer to be updated later.
- */
-    void
-redraw_curbuf_later(int type)
-{
-    redraw_buf_later(curbuf, type);
-}
-
-    void
-redraw_buf_later(buf_T *buf, int type)
-{
-    win_T	*wp;
-
-    FOR_ALL_WINDOWS(wp)
-    {
-	if (wp->w_buffer == buf)
-	    redraw_win_later(wp, type);
-    }
-}
-
-#if defined(FEAT_SIGNS) || defined(PROTO)
-    void
-redraw_buf_line_later(buf_T *buf, linenr_T lnum)
-{
-    win_T	*wp;
-
-    FOR_ALL_WINDOWS(wp)
-	if (wp->w_buffer == buf && lnum >= wp->w_topline
-						  && lnum < wp->w_botline)
-	    redrawWinline(wp, lnum);
-}
-#endif
-
-#if defined(FEAT_JOB_CHANNEL) || defined(PROTO)
-    void
-redraw_buf_and_status_later(buf_T *buf, int type)
-{
-    win_T	*wp;
-
-#ifdef FEAT_WILDMENU
-    if (wild_menu_showing != 0)
-	/* Don't redraw while the command line completion is displayed, it
-	 * would disappear. */
-	return;
-#endif
-    FOR_ALL_WINDOWS(wp)
-    {
-	if (wp->w_buffer == buf)
-	{
-	    redraw_win_later(wp, type);
-	    wp->w_redr_status = TRUE;
-	}
-    }
-}
-#endif
-
-#if defined(FEAT_TERMRESPONSE) || defined(PROTO)
-/*
- * Redraw as soon as possible.  When the command line is not scrolled redraw
- * right away and restore what was on the command line.
- * Return a code indicating what happened.
- */
-    int
-redraw_asap(int type)
-{
-    int		rows;
-    int		cols = screen_Columns;
-    int		r;
-    int		ret = 0;
-    schar_T	*screenline;	/* copy from ScreenLines[] */
-    sattr_T	*screenattr;	/* copy from ScreenAttrs[] */
-    int		i;
-    u8char_T	*screenlineUC = NULL;	/* copy from ScreenLinesUC[] */
-    u8char_T	*screenlineC[MAX_MCO];	/* copy from ScreenLinesC[][] */
-    schar_T	*screenline2 = NULL;	/* copy from ScreenLines2[] */
-
-    redraw_later(type);
-    if (msg_scrolled || (State != NORMAL && State != NORMAL_BUSY) || exiting)
-	return ret;
-
-    /* Allocate space to save the text displayed in the command line area. */
-    rows = screen_Rows - cmdline_row;
-    screenline = LALLOC_MULT(schar_T, rows * cols);
-    screenattr = LALLOC_MULT(sattr_T, rows * cols);
-    if (screenline == NULL || screenattr == NULL)
-	ret = 2;
-    if (enc_utf8)
-    {
-	screenlineUC = LALLOC_MULT(u8char_T, rows * cols);
-	if (screenlineUC == NULL)
-	    ret = 2;
-	for (i = 0; i < p_mco; ++i)
-	{
-	    screenlineC[i] = LALLOC_MULT(u8char_T, rows * cols);
-	    if (screenlineC[i] == NULL)
-		ret = 2;
-	}
-    }
-    if (enc_dbcs == DBCS_JPNU)
-    {
-	screenline2 = LALLOC_MULT(schar_T, rows * cols);
-	if (screenline2 == NULL)
-	    ret = 2;
-    }
-
-    if (ret != 2)
-    {
-	/* Save the text displayed in the command line area. */
-	for (r = 0; r < rows; ++r)
-	{
-	    mch_memmove(screenline + r * cols,
-			ScreenLines + LineOffset[cmdline_row + r],
-			(size_t)cols * sizeof(schar_T));
-	    mch_memmove(screenattr + r * cols,
-			ScreenAttrs + LineOffset[cmdline_row + r],
-			(size_t)cols * sizeof(sattr_T));
-	    if (enc_utf8)
-	    {
-		mch_memmove(screenlineUC + r * cols,
-			    ScreenLinesUC + LineOffset[cmdline_row + r],
-			    (size_t)cols * sizeof(u8char_T));
-		for (i = 0; i < p_mco; ++i)
-		    mch_memmove(screenlineC[i] + r * cols,
-				ScreenLinesC[i] + LineOffset[cmdline_row + r],
-				(size_t)cols * sizeof(u8char_T));
-	    }
-	    if (enc_dbcs == DBCS_JPNU)
-		mch_memmove(screenline2 + r * cols,
-			    ScreenLines2 + LineOffset[cmdline_row + r],
-			    (size_t)cols * sizeof(schar_T));
-	}
-
-	update_screen(0);
-	ret = 3;
-
-	if (must_redraw == 0)
-	{
-	    int	off = (int)(current_ScreenLine - ScreenLines);
-
-	    /* Restore the text displayed in the command line area. */
-	    for (r = 0; r < rows; ++r)
-	    {
-		mch_memmove(current_ScreenLine,
-			    screenline + r * cols,
-			    (size_t)cols * sizeof(schar_T));
-		mch_memmove(ScreenAttrs + off,
-			    screenattr + r * cols,
-			    (size_t)cols * sizeof(sattr_T));
-		if (enc_utf8)
-		{
-		    mch_memmove(ScreenLinesUC + off,
-				screenlineUC + r * cols,
-				(size_t)cols * sizeof(u8char_T));
-		    for (i = 0; i < p_mco; ++i)
-			mch_memmove(ScreenLinesC[i] + off,
-				    screenlineC[i] + r * cols,
-				    (size_t)cols * sizeof(u8char_T));
-		}
-		if (enc_dbcs == DBCS_JPNU)
-		    mch_memmove(ScreenLines2 + off,
-				screenline2 + r * cols,
-				(size_t)cols * sizeof(schar_T));
-		screen_line(cmdline_row + r, 0, cols, cols, 0);
-	    }
-	    ret = 4;
-	}
-    }
-
-    vim_free(screenline);
-    vim_free(screenattr);
-    if (enc_utf8)
-    {
-	vim_free(screenlineUC);
-	for (i = 0; i < p_mco; ++i)
-	    vim_free(screenlineC[i]);
-    }
-    if (enc_dbcs == DBCS_JPNU)
-	vim_free(screenline2);
-
-    /* Show the intro message when appropriate. */
-    maybe_intro_message();
-
-    setcursor();
-
-    return ret;
-}
-#endif
-
-/*
- * Invoked after an asynchronous callback is called.
- * If an echo command was used the cursor needs to be put back where
- * it belongs. If highlighting was changed a redraw is needed.
- * If "call_update_screen" is FALSE don't call update_screen() when at the
- * command line.
- */
-    void
-redraw_after_callback(int call_update_screen)
-{
-    ++redrawing_for_callback;
-
-    if (State == HITRETURN || State == ASKMORE)
-	; // do nothing
-    else if (State & CMDLINE)
-    {
-	// Don't redraw when in prompt_for_number().
-	if (cmdline_row > 0)
-	{
-	    // Redrawing only works when the screen didn't scroll. Don't clear
-	    // wildmenu entries.
-	    if (msg_scrolled == 0
-#ifdef FEAT_WILDMENU
-		    && wild_menu_showing == 0
-#endif
-		    && call_update_screen)
-		update_screen(0);
-
-	    // Redraw in the same position, so that the user can continue
-	    // editing the command.
-	    redrawcmdline_ex(FALSE);
-	}
-    }
-    else if (State & (NORMAL | INSERT | TERMINAL))
-    {
-	// keep the command line if possible
-	update_screen(VALID_NO_UPDATE);
-	setcursor();
-    }
-    cursor_on();
-#ifdef FEAT_GUI
-    if (gui.in_use && !gui_mch_is_blink_off())
-	// Don't update the cursor when it is blinking and off to avoid
-	// flicker.
-	out_flush_cursor(FALSE, FALSE);
-    else
-#endif
-	out_flush();
-
-    --redrawing_for_callback;
-}
-
-/*
- * Changed something in the current window, at buffer line "lnum", that
- * requires that line and possibly other lines to be redrawn.
- * Used when entering/leaving Insert mode with the cursor on a folded line.
- * Used to remove the "$" from a change command.
- * Note that when also inserting/deleting lines w_redraw_top and w_redraw_bot
- * may become invalid and the whole window will have to be redrawn.
- */
-    void
-redrawWinline(
-    win_T	*wp,
-    linenr_T	lnum)
-{
-    if (wp->w_redraw_top == 0 || wp->w_redraw_top > lnum)
-	wp->w_redraw_top = lnum;
-    if (wp->w_redraw_bot == 0 || wp->w_redraw_bot < lnum)
-	wp->w_redraw_bot = lnum;
-    redraw_win_later(wp, VALID);
-}
-
-/*
- * 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);
-}
-
-/*
- * 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;
-#if defined(FEAT_SEARCH_EXTRA) || defined(FEAT_CLIPBOARD)
-    int		did_one;
-#endif
-#ifdef FEAT_GUI
-    int		did_undraw = FALSE;
-    int		gui_cursor_col = 0;
-    int		gui_cursor_row = 0;
-#endif
-    int		no_update = FALSE;
-
-    /* Don't do anything if the screen structures are (not yet) valid. */
-    if (!screen_valid(TRUE))
-	return FAIL;
-
-    if (type == 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 < NOT_VALID
-#ifdef FEAT_TERMINAL
-	    && !term_do_update_window(curwin)
-#endif
-		)
-	type = 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 > INVERTED_ALL)
-	    curwin->w_lines_valid = 0;	/* don't use w_lines[].wl_size now */
-	return FAIL;
-    }
-    updating_screen = TRUE;
-
-#ifdef FEAT_TEXT_PROP
-    // 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 (msg_scrolled > Rows - 5)	    /* clearing is faster */
-	    type = CLEAR;
-	else if (type != CLEAR)
-	{
-	    check_for_delay(FALSE);
-	    if (screen_ins_lines(0, 0, msg_scrolled, (int)Rows, 0, NULL)
-								       == FAIL)
-		type = CLEAR;
-	    FOR_ALL_WINDOWS(wp)
-	    {
-		if (wp->w_winrow < msg_scrolled)
-		{
-		    if (W_WINROW(wp) + wp->w_height > msg_scrolled
-			    && wp->w_redr_type < 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 = REDRAW_TOP;
-		    }
-		    else
-		    {
-			wp->w_redr_type = 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 == CLEAR)		/* first clear screen */
-    {
-	screenclear();		/* will reset clear_cmdline */
-	type = 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 < NOT_VALID
-	   && curwin->w_nrwidth != ((curwin->w_p_nu || curwin->w_p_rnu)
-				    ? number_width(curwin) : 0))
-	curwin->w_redr_type = NOT_VALID;
-#endif
-
-    /*
-     * Only start redrawing if there is really something to do.
-     */
-    if (type == INVERTED)
-	update_curswant();
-    if (curwin->w_redr_type < type
-	    && !((type == 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 == 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 >= 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
-
-    /*
-     * Go from top to bottom through the windows, redrawing the ones that need
-     * it.
-     */
-#if defined(FEAT_SEARCH_EXTRA) || defined(FEAT_CLIPBOARD)
-    did_one = FALSE;
-#endif
-#ifdef FEAT_SEARCH_EXTRA
-    search_hl.rm.regprog = NULL;
-#endif
-    FOR_ALL_WINDOWS(wp)
-    {
-	if (wp->w_redr_type != 0)
-	{
-	    cursor_off();
-#if defined(FEAT_SEARCH_EXTRA) || defined(FEAT_CLIPBOARD)
-	    if (!did_one)
-	    {
-		did_one = TRUE;
-# ifdef FEAT_SEARCH_EXTRA
-		start_search_hl();
-# endif
-# ifdef FEAT_CLIPBOARD
-		/* When Visual area changed, may have to update selection. */
-		if (clip_star.available && clip_isautosel_star())
-		    clip_update_selection(&clip_star);
-		if (clip_plus.available && clip_isautosel_plus())
-		    clip_update_selection(&clip_plus);
-# endif
-#ifdef FEAT_GUI
-		/* Remove the cursor before starting to do anything, because
-		 * scrolling may make it difficult to redraw the text under
-		 * it. */
-		if (gui.in_use && wp == curwin)
-		{
-		    gui_cursor_col = gui.cursor_col;
-		    gui_cursor_row = gui.cursor_row;
-		    gui_undraw_cursor();
-		    did_undraw = TRUE;
-		}
-#endif
-	    }
-#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_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_TEXT_PROP
-    // Display popup windows on top of the windows and command line.
-    update_popups(win_update);
-#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;
-}
-
-#if defined(FEAT_NETBEANS_INTG) || defined(FEAT_GUI)
-/*
- * Prepare for updating one or more windows.
- * Caller must check for "updating_screen" already set to avoid recursiveness.
- */
-    static void
-update_prepare(void)
-{
-    cursor_off();
-    updating_screen = TRUE;
-#ifdef FEAT_GUI
-    /* Remove the cursor before starting to do anything, because scrolling may
-     * make it difficult to redraw the text under it. */
-    if (gui.in_use)
-	gui_undraw_cursor();
-#endif
-#ifdef FEAT_SEARCH_EXTRA
-    start_search_hl();
-#endif
-#ifdef FEAT_TEXT_PROP
-    // Update popup_mask if needed.
-    may_update_popup_mask(must_redraw);
-#endif
-}
-
-/*
- * Finish updating one or more windows.
- */
-    static void
-update_finish(void)
-{
-    if (redraw_cmdline || redraw_mode)
-	showmode();
-
-# ifdef FEAT_SEARCH_EXTRA
-    end_search_hl();
-# endif
-
-    after_updating_screen(TRUE);
-
-# ifdef FEAT_GUI
-    /* Redraw the cursor and update the scrollbars when all screen updating is
-     * done. */
-    if (gui.in_use)
-    {
-	out_flush_cursor(FALSE, FALSE);
-	gui_update_scrollbars(FALSE);
-    }
-# endif
-}
-#endif
-
 #if defined(FEAT_CONCEAL) || defined(PROTO)
 /*
  * Return TRUE if the cursor line in window "wp" may be concealed, according
@@ -944,52 +97,6 @@ conceal_check_cursor_line(void)
 }
 #endif
 
-#if defined(FEAT_NETBEANS_INTG) || defined(PROTO)
-    void
-update_debug_sign(buf_T *buf, linenr_T lnum)
-{
-    win_T	*wp;
-    int		doit = FALSE;
-
-# ifdef FEAT_FOLDING
-    win_foldinfo.fi_level = 0;
-# endif
-
-    // update/delete a specific sign
-    redraw_buf_line_later(buf, lnum);
-
-    // check if it resulted in the need to redraw a window
-    FOR_ALL_WINDOWS(wp)
-	if (wp->w_redr_type != 0)
-	    doit = TRUE;
-
-    /* Return when there is nothing to do, screen updating is already
-     * happening (recursive call), messages on the screen or still starting up.
-     */
-    if (!doit || updating_screen
-	    || State == ASKMORE || State == HITRETURN
-	    || msg_scrolled
-#ifdef FEAT_GUI
-	    || gui.starting
-#endif
-	    || starting)
-	return;
-
-    /* update all windows that need updating */
-    update_prepare();
-
-    FOR_ALL_WINDOWS(wp)
-    {
-	if (wp->w_redr_type != 0)
-	    win_update(wp);
-	if (wp->w_redr_status)
-	    win_redr_status(wp, FALSE);
-    }
-
-    update_finish();
-}
-#endif
-
 /*
  * Get 'wincolor' attribute for window "wp".  If not set and "wp" is a popup
  * window then get the "Pmenu" highlight attribute.
@@ -1013,1353 +120,6 @@ get_wcr_attr(win_T *wp)
     return wcr_attr;
 }
 
-#if defined(FEAT_GUI) || defined(PROTO)
-/*
- * Update a single window, its status line and maybe the command line msg.
- * Used for the GUI scrollbar.
- */
-    void
-updateWindow(win_T *wp)
-{
-    /* return if already busy updating */
-    if (updating_screen)
-	return;
-
-    update_prepare();
-
-#ifdef FEAT_CLIPBOARD
-    /* When Visual area changed, may have to update selection. */
-    if (clip_star.available && clip_isautosel_star())
-	clip_update_selection(&clip_star);
-    if (clip_plus.available && clip_isautosel_plus())
-	clip_update_selection(&clip_plus);
-#endif
-
-    win_update(wp);
-
-    /* When the screen was cleared redraw the tab pages line. */
-    if (redraw_tabline)
-	draw_tabline();
-
-    if (wp->w_redr_status
-# ifdef FEAT_CMDL_INFO
-	    || p_ru
-# endif
-# ifdef FEAT_STL_OPT
-	    || *p_stl != NUL || *wp->w_p_stl != NUL
-# endif
-	    )
-	win_redr_status(wp, FALSE);
-
-#ifdef FEAT_TEXT_PROP
-    // Display popup windows on top of everything.
-    update_popups(win_update);
-#endif
-
-    update_finish();
-}
-#endif
-
-/*
- * Update a single window.
- *
- * This may cause the windows below it also to be redrawn (when clearing the
- * screen or scrolling lines).
- *
- * How the window is redrawn depends on wp->w_redr_type.  Each type also
- * implies the one below it.
- * NOT_VALID	redraw the whole window
- * SOME_VALID	redraw the whole window but do scroll when possible
- * REDRAW_TOP	redraw the top w_upd_rows window lines, otherwise like VALID
- * INVERTED	redraw the changed part of the Visual area
- * INVERTED_ALL	redraw the whole Visual area
- * VALID	1. scroll up/down to adjust for a changed w_topline
- *		2. update lines at the top when scrolled down
- *		3. redraw changed text:
- *		   - if wp->w_buffer->b_mod_set set, update lines between
- *		     b_mod_top and b_mod_bot.
- *		   - if wp->w_redraw_top non-zero, redraw lines between
- *		     wp->w_redraw_top and wp->w_redr_bot.
- *		   - continue redrawing when syntax status is invalid.
- *		4. if scrolled up, update lines at the bottom.
- * This results in three areas that may need updating:
- * top:	from first row to top_end (when scrolled down)
- * mid: from mid_start to mid_end (update inversion or changed text)
- * bot: from bot_start to last row (when scrolled up)
- */
-    static void
-win_update(win_T *wp)
-{
-    buf_T	*buf = wp->w_buffer;
-    int		type;
-    int		top_end = 0;	/* Below last row of the top area that needs
-				   updating.  0 when no top area updating. */
-    int		mid_start = 999;/* first row of the mid area that needs
-				   updating.  999 when no mid area updating. */
-    int		mid_end = 0;	/* Below last row of the mid area that needs
-				   updating.  0 when no mid area updating. */
-    int		bot_start = 999;/* first row of the bot area that needs
-				   updating.  999 when no bot area updating */
-    int		scrolled_down = FALSE;	/* TRUE when scrolled down when
-					   w_topline got smaller a bit */
-#ifdef FEAT_SEARCH_EXTRA
-    int		top_to_mod = FALSE;    // redraw above mod_top
-#endif
-
-    int		row;		/* current window row to display */
-    linenr_T	lnum;		/* current buffer lnum to display */
-    int		idx;		/* current index in w_lines[] */
-    int		srow;		/* starting row of the current line */
-
-    int		eof = FALSE;	/* if TRUE, we hit the end of the file */
-    int		didline = FALSE; /* if TRUE, we finished the last line */
-    int		i;
-    long	j;
-    static int	recursive = FALSE;	/* being called recursively */
-    int		old_botline = wp->w_botline;
-#ifdef FEAT_FOLDING
-    long	fold_count;
-#endif
-#ifdef FEAT_SYN_HL
-    /* remember what happened to the previous line, to know if
-     * check_visual_highlight() can be used */
-#define DID_NONE 1	/* didn't update a line */
-#define DID_LINE 2	/* updated a normal line */
-#define DID_FOLD 3	/* updated a folded line */
-    int		did_update = DID_NONE;
-    linenr_T	syntax_last_parsed = 0;		/* last parsed text line */
-#endif
-    linenr_T	mod_top = 0;
-    linenr_T	mod_bot = 0;
-#if defined(FEAT_SYN_HL) || defined(FEAT_SEARCH_EXTRA)
-    int		save_got_int;
-#endif
-#ifdef SYN_TIME_LIMIT
-    proftime_T	syntax_tm;
-#endif
-
-    type = wp->w_redr_type;
-
-    if (type == NOT_VALID)
-    {
-	wp->w_redr_status = TRUE;
-	wp->w_lines_valid = 0;
-    }
-
-    /* Window is zero-height: nothing to draw. */
-    if (wp->w_height + WINBAR_HEIGHT(wp) == 0)
-    {
-	wp->w_redr_type = 0;
-	return;
-    }
-
-    /* Window is zero-width: Only need to draw the separator. */
-    if (wp->w_width == 0)
-    {
-	/* draw the vertical separator right of this window */
-	draw_vsep_win(wp, 0);
-	wp->w_redr_type = 0;
-	return;
-    }
-
-#ifdef FEAT_TERMINAL
-    // If this window contains a terminal, redraw works completely differently.
-    if (term_do_update_window(wp))
-    {
-	term_update_window(wp);
-# ifdef FEAT_MENU
-	/* Draw the window toolbar, if there is one. */
-	if (winbar_height(wp) > 0)
-	    redraw_win_toolbar(wp);
-# endif
-	wp->w_redr_type = 0;
-	return;
-    }
-#endif
-
-#ifdef FEAT_SEARCH_EXTRA
-    init_search_hl(wp, &search_hl);
-#endif
-
-#ifdef FEAT_LINEBREAK
-    /* Force redraw when width of 'number' or 'relativenumber' column
-     * changes. */
-    i = (wp->w_p_nu || wp->w_p_rnu) ? number_width(wp) : 0;
-    if (wp->w_nrwidth != i)
-    {
-	type = NOT_VALID;
-	wp->w_nrwidth = i;
-    }
-    else
-#endif
-
-    if (buf->b_mod_set && buf->b_mod_xlines != 0 && wp->w_redraw_top != 0)
-    {
-	/*
-	 * When there are both inserted/deleted lines and specific lines to be
-	 * redrawn, w_redraw_top and w_redraw_bot may be invalid, just redraw
-	 * everything (only happens when redrawing is off for while).
-	 */
-	type = NOT_VALID;
-    }
-    else
-    {
-	/*
-	 * Set mod_top to the first line that needs displaying because of
-	 * changes.  Set mod_bot to the first line after the changes.
-	 */
-	mod_top = wp->w_redraw_top;
-	if (wp->w_redraw_bot != 0)
-	    mod_bot = wp->w_redraw_bot + 1;
-	else
-	    mod_bot = 0;
-	if (buf->b_mod_set)
-	{
-	    if (mod_top == 0 || mod_top > buf->b_mod_top)
-	    {
-		mod_top = buf->b_mod_top;
-#ifdef FEAT_SYN_HL
-		/* Need to redraw lines above the change that may be included
-		 * in a pattern match. */
-		if (syntax_present(wp))
-		{
-		    mod_top -= buf->b_s.b_syn_sync_linebreaks;
-		    if (mod_top < 1)
-			mod_