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, 3131 insertions, 0 deletions

diff --git a/src/drawline.c b/src/drawline.c
new file mode 100644
index 000000000..39ec5ed40
--- /dev/null
+++ b/src/drawline.c
@@ -0,0 +1,3131 @@
+/* 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.
+ */
+
+/*
+ * drawline.c: Functions for drawing window lines on the screen.
+ * This is the middle level, drawscreen. is the higher level and screen.c the
+ * lower level.
+ */
+
+#include "vim.h"
+
+#ifdef FEAT_SYN_HL
+/*
+ * Advance **color_cols and return TRUE when there are columns to draw.
+ */
+    static int
+advance_color_col(int vcol, int **color_cols)
+{
+    while (**color_cols >= 0 && vcol > **color_cols)
+	++*color_cols;
+    return (**color_cols >= 0);
+}
+#endif
+
+#ifdef FEAT_SYN_HL
+/*
+ * Used when 'cursorlineopt' contains "screenline": compute the margins between
+ * which the highlighting is used.
+ */
+    static void
+margin_columns_win(win_T *wp, int *left_col, int *right_col)
+{
+    // cache previous calculations depending on w_virtcol
+    static int saved_w_virtcol;
+    static win_T *prev_wp;
+    static int prev_left_col;
+    static int prev_right_col;
+    static int prev_col_off;
+
+    int cur_col_off = win_col_off(wp);
+    int	width1;
+    int	width2;
+
+    if (saved_w_virtcol == wp->w_virtcol
+	    && prev_wp == wp && prev_col_off == cur_col_off)
+    {
+	*right_col = prev_right_col;
+	*left_col = prev_left_col;
+	return;
+    }
+
+    width1 = wp->w_width - cur_col_off;
+    width2 = width1 + win_col_off2(wp);
+
+    *left_col = 0;
+    *right_col = width1;
+
+    if (wp->w_virtcol >= (colnr_T)width1)
+	*right_col = width1 + ((wp->w_virtcol - width1) / width2 + 1) * width2;
+    if (wp->w_virtcol >= (colnr_T)width1 && width2 > 0)
+	*left_col = (wp->w_virtcol - width1) / width2 * width2 + width1;
+
+    // cache values
+    prev_left_col = *left_col;
+    prev_right_col = *right_col;
+    prev_wp = wp;
+    saved_w_virtcol = wp->w_virtcol;
+    prev_col_off = cur_col_off;
+}
+#endif
+
+#ifdef FEAT_SIGNS
+/*
+ * Get information needed to display the sign in line 'lnum' in window 'wp'.
+ * If 'nrcol' is TRUE, the sign is going to be displayed in the number column.
+ * Otherwise the sign is going to be displayed in the sign column.
+ */
+    static void
+get_sign_display_info(
+	int		nrcol,
+	win_T		*wp,
+	linenr_T	lnum UNUSED,
+	sign_attrs_T	*sattr,
+	int		wcr_attr,
+	int		row,
+	int		startrow,
+	int		filler_lines UNUSED,
+	int		filler_todo UNUSED,
+	int		*c_extrap,
+	int		*c_finalp,
+	char_u		*extra,
+	char_u		**pp_extra,
+	int		*n_extrap,
+	int		*char_attrp)
+{
+    int	text_sign;
+# ifdef FEAT_SIGN_ICONS
+    int	icon_sign;
+# endif
+
+    // Draw two cells with the sign value or blank.
+    *c_extrap = ' ';
+    *c_finalp = NUL;
+    if (nrcol)
+	*n_extrap = number_width(wp) + 1;
+    else
+    {
+	*char_attrp = hl_combine_attr(wcr_attr, HL_ATTR(HLF_SC));
+	*n_extrap = 2;
+    }
+
+    if (row == startrow
+#ifdef FEAT_DIFF
+	    + filler_lines && filler_todo <= 0
+#endif
+       )
+    {
+	text_sign = (sattr->text != NULL) ? sattr->typenr : 0;
+# ifdef FEAT_SIGN_ICONS
+	icon_sign = (sattr->icon != NULL) ? sattr->typenr : 0;
+	if (gui.in_use && icon_sign != 0)
+	{
+	    // Use the image in this position.
+	    if (nrcol)
+	    {
+		*c_extrap = NUL;
+		sprintf((char *)extra, "%-*c ", number_width(wp), SIGN_BYTE);
+		*pp_extra = extra;
+		*n_extrap = (int)STRLEN(*pp_extra);
+	    }
+	    else
+		*c_extrap = SIGN_BYTE;
+#  ifdef FEAT_NETBEANS_INTG
+	    if (netbeans_active() && (buf_signcount(wp->w_buffer, lnum) > 1))
+	    {
+		if (nrcol)
+		{
+		    *c_extrap = NUL;
+		    sprintf((char *)extra, "%-*c ", number_width(wp),
+							MULTISIGN_BYTE);
+		    *pp_extra = extra;
+		    *n_extrap = (int)STRLEN(*pp_extra);
+		}
+		else
+		    *c_extrap = MULTISIGN_BYTE;
+	    }
+#  endif
+	    *c_finalp = NUL;
+	    *char_attrp = icon_sign;
+	}
+	else
+# endif
+	    if (text_sign != 0)
+	    {
+		*pp_extra = sattr->text;
+		if (*pp_extra != NULL)
+		{
+		    if (nrcol)
+		    {
+			int n, width = number_width(wp) - 2;
+
+			for (n = 0; n < width; n++)
+			    extra[n] = ' ';
+			extra[n] = 0;
+			STRCAT(extra, *pp_extra);
+			STRCAT(extra, " ");
+			*pp_extra = extra;
+		    }
+		    *c_extrap = NUL;
+		    *c_finalp = NUL;
+		    *n_extrap = (int)STRLEN(*pp_extra);
+		}
+		*char_attrp = sattr->texthl;
+	    }
+    }
+}
+#endif
+
+#ifdef FEAT_TEXT_PROP
+static textprop_T	*current_text_props = NULL;
+static buf_T		*current_buf = NULL;
+
+    static int
+text_prop_compare(const void *s1, const void *s2)
+{
+    int  idx1, idx2;
+    proptype_T  *pt1, *pt2;
+    colnr_T col1, col2;
+
+    idx1 = *(int *)s1;
+    idx2 = *(int *)s2;
+    pt1 = text_prop_type_by_id(current_buf, current_text_props[idx1].tp_type);
+    pt2 = text_prop_type_by_id(current_buf, current_text_props[idx2].tp_type);
+    if (pt1 == pt2)
+	return 0;
+    if (pt1 == NULL)
+	return -1;
+    if (pt2 == NULL)
+	return 1;
+    if (pt1->pt_priority != pt2->pt_priority)
+	return pt1->pt_priority > pt2->pt_priority ? 1 : -1;
+    col1 = current_text_props[idx1].tp_col;
+    col2 = current_text_props[idx2].tp_col;
+    return col1 == col2 ? 0 : col1 > col2 ? 1 : -1;
+}
+#endif
+
+/*
+ * Display line "lnum" of window 'wp' on the screen.
+ * Start at row "startrow", stop when "endrow" is reached.
+ * wp->w_virtcol needs to be valid.
+ *
+ * Return the number of last row the line occupies.
+ */
+    int
+win_line(
+    win_T	*wp,
+    linenr_T	lnum,
+    int		startrow,
+    int		endrow,
+    int		nochange UNUSED,	// not updating for changed text
+    int		number_only)		// only update the number column
+{
+    int		col = 0;		// visual column on screen
+    unsigned	off;			// offset in ScreenLines/ScreenAttrs
+    int		c = 0;			// init for GCC
+    long	vcol = 0;		// virtual column (for tabs)
+#ifdef FEAT_LINEBREAK
+    long	vcol_sbr = -1;		// virtual column after showbreak
+#endif
+    long	vcol_prev = -1;		// "vcol" of previous character
+    char_u	*line;			// current line
+    char_u	*ptr;			// current position in "line"
+    int		row;			// row in the window, excl w_winrow
+    int		screen_row;		// row on the screen, incl w_winrow
+
+    char_u	extra[21];		// "%ld " and 'fdc' must fit in here
+    int		n_extra = 0;		// number of extra chars
+    char_u	*p_extra = NULL;	// string of extra chars, plus NUL
+    char_u	*p_extra_free = NULL;   // p_extra needs to be freed
+    int		c_extra = NUL;		// extra chars, all the same
+    int		c_final = NUL;		// final char, mandatory if set
+    int		extra_attr = 0;		// attributes when n_extra != 0
+    static char_u *at_end_str = (char_u *)""; // used for p_extra when
+					   // displaying lcs_eol at end-of-line
+    int		lcs_eol_one = lcs_eol;	// lcs_eol until it's been used
+    int		lcs_prec_todo = lcs_prec;   // lcs_prec until it's been used
+
+    // saved "extra" items for when draw_state becomes WL_LINE (again)
+    int		saved_n_extra = 0;
+    char_u	*saved_p_extra = NULL;
+    int		saved_c_extra = 0;
+    int		saved_c_final = 0;
+    int		saved_char_attr = 0;
+
+    int		n_attr = 0;		// chars with special attr
+    int		saved_attr2 = 0;	// char_attr saved for n_attr
+    int		n_attr3 = 0;		// chars with overruling special attr
+    int		saved_attr3 = 0;	// char_attr saved for n_attr3
+
+    int		n_skip = 0;		// nr of chars to skip for 'nowrap'
+
+    int		fromcol = -10;		// start of inverting
+    int		tocol = MAXCOL;		// end of inverting
+    int		fromcol_prev = -2;	// start of inverting after cursor
+    int		noinvcur = FALSE;	// don't invert the cursor
+    pos_T	*top, *bot;
+    int		lnum_in_visual_area = FALSE;
+    pos_T	pos;
+    long	v;
+
+    int		char_attr = 0;		// attributes for next character
+    int		attr_pri = FALSE;	// char_attr has priority
+    int		area_highlighting = FALSE; // Visual or incsearch highlighting
+					   // in this line
+    int		vi_attr = 0;		// attributes for Visual and incsearch
+					// highlighting
+    int		wcr_attr = 0;		// attributes from 'wincolor'
+    int		win_attr = 0;		// background for whole window, except
+					// margins and "~" lines.
+    int		area_attr = 0;		// attributes desired by highlighting
+    int		search_attr = 0;	// attributes desired by 'hlsearch'
+#ifdef FEAT_SYN_HL
+    int		vcol_save_attr = 0;	// saved attr for 'cursorcolumn'
+    int		syntax_attr = 0;	// attributes desired by syntax
+    int		has_syntax = FALSE;	// this buffer has syntax highl.
+    int		save_did_emsg;
+    int		draw_color_col = FALSE;	// highlight colorcolumn
+    int		*color_cols = NULL;	// pointer to according columns array
+#endif
+    int		eol_hl_off = 0;		// 1 if highlighted char after EOL
+#ifdef FEAT_TEXT_PROP
+    int		text_prop_count;
+    int		text_prop_next = 0;	// next text property to use
+    textprop_T	*text_props = NULL;
+    int		*text_prop_idxs = NULL;
+    int		text_props_active = 0;
+    proptype_T  *text_prop_type = NULL;
+    int		text_prop_attr = 0;
+    int		text_prop_combine = FALSE;
+#endif
+#ifdef FEAT_SPELL
+    int		has_spell = FALSE;	// this buffer has spell checking
+# define SPWORDLEN 150
+    char_u	nextline[SPWORDLEN * 2];// text with start of the next line
+    int		nextlinecol = 0;	// column where nextline[] starts
+    int		nextline_idx = 0;	// index in nextline[] where next line
+					// starts
+    int		spell_attr = 0;		// attributes desired by spelling
+    int		word_end = 0;		// last byte with same spell_attr
+    static linenr_T  checked_lnum = 0;	// line number for "checked_col"
+    static int	checked_col = 0;	// column in "checked_lnum" up to which
+					// there are no spell errors
+    static int	cap_col = -1;		// column to check for Cap word
+    static linenr_T capcol_lnum = 0;	// line number where "cap_col" used
+    int		cur_checked_col = 0;	// checked column for current line
+#endif
+    int		extra_check = 0;	// has extra highlighting
+    int		multi_attr = 0;		// attributes desired by multibyte
+    int		mb_l = 1;		// multi-byte byte length
+    int		mb_c = 0;		// decoded multi-byte character
+    int		mb_utf8 = FALSE;	// screen char is UTF-8 char
+    int		u8cc[MAX_MCO];		// composing UTF-8 chars
+#if defined(FEAT_DIFF) || defined(FEAT_SIGNS)
+    int		filler_lines = 0;	// nr of filler lines to be drawn
+    int		filler_todo = 0;	// nr of filler lines still to do + 1
+#endif
+#ifdef FEAT_DIFF
+    hlf_T	diff_hlf = (hlf_T)0;	// type of diff highlighting
+    int		change_start = MAXCOL;	// first col of changed area
+    int		change_end = -1;	// last col of changed area
+#endif
+    colnr_T	trailcol = MAXCOL;	// start of trailing spaces
+#ifdef FEAT_LINEBREAK
+    int		need_showbreak = FALSE; // overlong line, skipping first x
+					// chars
+#endif
+#if defined(FEAT_SIGNS) || defined(FEAT_QUICKFIX) \
+	|| defined(FEAT_SYN_HL) || defined(FEAT_DIFF)
+# define LINE_ATTR
+    int		line_attr = 0;		// attribute for the whole line
+    int		line_attr_save;
+#endif
+#ifdef FEAT_SIGNS
+    int		sign_present = FALSE;
+    sign_attrs_T sattr;
+#endif
+#ifdef FEAT_ARABIC
+    int		prev_c = 0;		// previous Arabic character
+    int		prev_c1 = 0;		// first composing char for prev_c
+#endif
+#if defined(LINE_ATTR)
+    int		did_line_attr = 0;
+#endif
+#ifdef FEAT_TERMINAL
+    int		get_term_attr = FALSE;
+#endif
+#ifdef FEAT_SYN_HL
+    int		cul_attr = 0;		// set when 'cursorline' active
+
+    // 'cursorlineopt' has "screenline" and cursor is in this line
+    int		cul_screenline = FALSE;
+
+    // margin columns for the screen line, needed for when 'cursorlineopt'
+    // contains "screenline"
+    int		left_curline_col = 0;
+    int		right_curline_col = 0;
+#endif
+
+    // draw_state: items that are drawn in sequence:
+#define WL_START	0		// nothing done yet
+#ifdef FEAT_CMDWIN
+# define WL_CMDLINE	WL_START + 1	// cmdline window column
+#else
+# define WL_CMDLINE	WL_START
+#endif
+#ifdef FEAT_FOLDING
+# define WL_FOLD	WL_CMDLINE + 1	// 'foldcolumn'
+#else
+# define WL_FOLD	WL_CMDLINE
+#endif
+#ifdef FEAT_SIGNS
+# define WL_SIGN	WL_FOLD + 1	// column for signs
+#else
+# define WL_SIGN	WL_FOLD		// column for signs
+#endif
+#define WL_NR		WL_SIGN + 1	// line number
+#ifdef FEAT_LINEBREAK
+# define WL_BRI		WL_NR + 1	// 'breakindent'
+#else
+# define WL_BRI		WL_NR
+#endif
+#if defined(FEAT_LINEBREAK) || defined(FEAT_DIFF)
+# define WL_SBR		WL_BRI + 1	// 'showbreak' or 'diff'
+#else
+# define WL_SBR		WL_BRI
+#endif
+#define WL_LINE		WL_SBR + 1	// text in the line
+    int		draw_state = WL_START;	// what to draw next
+#if defined(FEAT_XIM) && defined(FEAT_GUI_GTK)
+    int		feedback_col = 0;
+    int		feedback_old_attr = -1;
+#endif
+    int		screen_line_flags = 0;
+
+#if defined(FEAT_CONCEAL) || defined(FEAT_SEARCH_EXTRA)
+    int		match_conc	= 0;	// cchar for match functions
+#endif
+#ifdef FEAT_CONCEAL
+    int		syntax_flags	= 0;
+    int		syntax_seqnr	= 0;
+    int		prev_syntax_id	= 0;
+    int		conceal_attr	= HL_ATTR(HLF_CONCEAL);
+    int		is_concealing	= FALSE;
+    int		boguscols	= 0;	// nonexistent columns added to force
+					// wrapping
+    int		vcol_off	= 0;	// offset for concealed characters
+    int		did_wcol	= FALSE;
+    int		old_boguscols   = 0;
+# define VCOL_HLC (vcol - vcol_off)
+# define FIX_FOR_BOGUSCOLS \
+    { \
+	n_extra += vcol_off; \
+	vcol -= vcol_off; \
+	vcol_off = 0; \
+	col -= boguscols; \
+	old_boguscols = boguscols; \
+	boguscols = 0; \
+    }
+#else
+# define VCOL_HLC (vcol)
+#endif
+
+    if (startrow > endrow)		// past the end already!
+	return startrow;
+
+    row = startrow;
+    screen_row = row + W_WINROW(wp);
+
+    if (!number_only)
+    {
+	// To speed up the loop below, set extra_check when there is linebreak,
+	// trailing white space and/or syntax processing to be done.
+#ifdef FEAT_LINEBREAK
+	extra_check = wp->w_p_lbr;
+#endif
+#ifdef FEAT_SYN_HL
+	if (syntax_present(wp) && !wp->w_s->b_syn_error
+# ifdef SYN_TIME_LIMIT
+		&& !wp->w_s->b_syn_slow
+# endif
+	   )
+	{
+	    // Prepare for syntax highlighting in this line.  When there is an
+	    // error, stop syntax highlighting.
+	    save_did_emsg = did_emsg;
+	    did_emsg = FALSE;
+	    syntax_start(wp, lnum);
+	    if (did_emsg)
+		wp->w_s->b_syn_error = TRUE;
+	    else
+	    {
+		did_emsg = save_did_emsg;
+#ifdef SYN_TIME_LIMIT
+		if (!wp->w_s->b_syn_slow)
+#endif
+		{
+		    has_syntax = TRUE;
+		    extra_check = TRUE;
+		}
+	    }
+	}
+
+	// Check for columns to display for 'colorcolumn'.
+	color_cols = wp->w_p_cc_cols;
+	if (color_cols != NULL)
+	    draw_color_col = advance_color_col(VCOL_HLC, &color_cols);
+#endif
+
+#ifdef FEAT_TERMINAL
+	if (term_show_buffer(wp->w_buffer))
+	{
+	    extra_check = TRUE;
+	    get_term_attr = TRUE;
+	    win_attr = term_get_attr(wp->w_buffer, lnum, -1);
+	}
+#endif
+
+#ifdef FEAT_SPELL
+	if (wp->w_p_spell
+		&& *wp->w_s->b_p_spl != NUL
+		&& wp->w_s->b_langp.ga_len > 0
+		&& *(char **)(wp->w_s->b_langp.ga_data) != NULL)
+	{
+	    // Prepare for spell checking.
+	    has_spell = TRUE;
+	    extra_check = TRUE;
+
+	    // Get the start of the next line, so that words that wrap to the
+	    // next line are found too: "et<line-break>al.".
+	    // Trick: skip a few chars for C/shell/Vim comments
+	    nextline[SPWORDLEN] = NUL;
+	    if (lnum < wp->w_buffer->b_ml.ml_line_count)
+	    {
+		line = ml_get_buf(wp->w_buffer, lnum + 1, FALSE);
+		spell_cat_line(nextline + SPWORDLEN, line, SPWORDLEN);
+	    }
+
+	    // When a word wrapped from the previous line the start of the
+	    // current line is valid.
+	    if (lnum == checked_lnum)
+		cur_checked_col = checked_col;
+	    checked_lnum = 0;
+
+	    // When there was a sentence end in the previous line may require a
+	    // word starting with capital in this line.  In line 1 always check
+	    // the first word.
+	    if (lnum != capcol_lnum)
+		cap_col = -1;
+	    if (lnum == 1)
+		cap_col = 0;
+	    capcol_lnum = 0;
+	}
+#endif
+
+	// handle Visual active in this window
+	if (VIsual_active && wp->w_buffer == curwin->w_buffer)
+	{
+	    if (LTOREQ_POS(curwin->w_cursor, VIsual))
+	    {
+		// Visual is after curwin->w_cursor
+		top = &curwin->w_cursor;
+		bot = &VIsual;
+	    }
+	    else
+	    {
+		// Visual is before curwin->w_cursor
+		top = &VIsual;
+		bot = &curwin->w_cursor;
+	    }
+	    lnum_in_visual_area = (lnum >= top->lnum && lnum <= bot->lnum);
+	    if (VIsual_mode == Ctrl_V)
+	    {
+		// block mode
+		if (lnum_in_visual_area)
+		{
+		    fromcol = wp->w_old_cursor_fcol;
+		    tocol = wp->w_old_cursor_lcol;
+		}
+	    }
+	    else
+	    {
+		// non-block mode
+		if (lnum > top->lnum && lnum <= bot->lnum)
+		    fromcol = 0;
+		else if (lnum == top->lnum)
+		{
+		    if (VIsual_mode == 'V')	// linewise
+			fromcol = 0;
+		    else
+		    {
+			getvvcol(wp, top, (colnr_T *)&fromcol, NULL, NULL);
+			if (gchar_pos(top) == NUL)
+			    tocol = fromcol + 1;
+		    }
+		}
+		if (VIsual_mode != 'V' && lnum == bot->lnum)
+		{
+		    if (*p_sel == 'e' && bot->col == 0 && bot->coladd == 0)
+		    {
+			fromcol = -10;
+			tocol = MAXCOL;
+		    }
+		    else if (bot->col == MAXCOL)
+			tocol = MAXCOL;
+		    else
+		    {
+			pos = *bot;
+			if (*p_sel == 'e')
+			    getvvcol(wp, &pos, (colnr_T *)&tocol, NULL, NULL);
+			else
+			{
+			    getvvcol(wp, &pos, NULL, NULL, (colnr_T *)&tocol);
+			    ++tocol;
+			}
+		    }
+		}
+	    }
+
+	    // Check if the character under the cursor should not be inverted
+	    if (!highlight_match && lnum == curwin->w_cursor.lnum && wp == curwin
+#ifdef FEAT_GUI
+		    && !gui.in_use
+#endif
+		    )
+		noinvcur = TRUE;
+
+	    // if inverting in this line set area_highlighting
+	    if (fromcol >= 0)
+	    {
+		area_highlighting = TRUE;
+		vi_attr = HL_ATTR(HLF_V);
+#if defined(FEAT_CLIPBOARD) && defined(FEAT_X11)
+		if ((clip_star.available && !clip_star.owned
+						      && clip_isautosel_star())
+			|| (clip_plus.available && !clip_plus.owned
+						     && clip_isautosel_plus()))
+		    vi_attr = HL_ATTR(HLF_VNC);
+#endif
+	    }
+	}
+
+	// handle 'incsearch' and ":s///c" highlighting
+	else if (highlight_match
+		&& wp == curwin
+		&& lnum >= curwin->w_cursor.lnum
+		&& lnum <= curwin->w_cursor.lnum + search_match_lines)
+	{
+	    if (lnum == curwin->w_cursor.lnum)
+		getvcol(curwin, &(curwin->w_cursor),
+					      (colnr_T *)&fromcol, NULL, NULL);
+	    else
+		fromcol = 0;
+	    if (lnum == curwin->w_cursor.lnum + search_match_lines)
+	    {
+		pos.lnum = lnum;
+		pos.col = search_match_endcol;
+		getvcol(curwin, &pos, (colnr_T *)&tocol, NULL, NULL);
+	    }
+	    else
+		tocol = MAXCOL;
+	    // do at least one character; happens when past end of line
+	    if (fromcol == tocol)
+		tocol = fromcol + 1;
+	    area_highlighting = TRUE;
+	    vi_attr = HL_ATTR(HLF_I);
+	}
+    }
+
+#ifdef FEAT_DIFF
+    filler_lines = diff_check(wp, lnum);
+    if (filler_lines < 0)
+    {
+	if (filler_lines == -1)
+	{
+	    if (diff_find_change(wp, lnum, &change_start, &change_end))
+		diff_hlf = HLF_ADD;	// added line
+	    else if (change_start == 0)
+		diff_hlf = HLF_TXD;	// changed text
+	    else
+		diff_hlf = HLF_CHD;	// changed line
+	}
+	else
+	    diff_hlf = HLF_ADD;		// added line
+	filler_lines = 0;
+	area_highlighting = TRUE;
+    }
+    if (lnum == wp->w_topline)
+	filler_lines = wp->w_topfill;
+    filler_todo = filler_lines;
+#endif
+
+#ifdef FEAT_SIGNS
+    sign_present = buf_get_signattrs(wp->w_buffer, lnum, &sattr);
+#endif
+
+#ifdef LINE_ATTR
+# ifdef FEAT_SIGNS
+    // If this line has a sign with line highlighting set line_attr.
+    if (sign_present)
+	line_attr = sattr.linehl;
+# endif
+# if defined(FEAT_QUICKFIX)
+    // Highlight the current line in the quickfix window.
+    if (bt_quickfix(wp->w_buffer) && qf_current_entry(wp) == lnum)
+	line_attr = HL_ATTR(HLF_QFL);
+# endif
+    if (line_attr != 0)
+	area_highlighting = TRUE;
+#endif
+
+    line = ml_get_buf(wp->w_buffer, lnum, FALSE);
+    ptr = line;
+
+#ifdef FEAT_SPELL
+    if (has_spell && !number_only)
+    {
+	// For checking first word with a capital skip white space.
+	if (cap_col == 0)
+	    cap_col = getwhitecols(line);
+
+	// To be able to spell-check over line boundaries copy the end of the
+	// current line into nextline[].  Above the start of the next line was
+	// copied to nextline[SPWORDLEN].
+	if (nextline[SPWORDLEN] == NUL)
+	{
+	    // No next line or it is empty.
+	    nextlinecol = MAXCOL;
+	    nextline_idx = 0;
+	}
+	else
+	{
+	    v = (long)STRLEN(line);
+	    if (v < SPWORDLEN)
+	    {
+		// Short line, use it completely and append the start of the
+		// next line.
+		nextlinecol = 0;
+		mch_memmove(nextline, line, (size_t)v);
+		STRMOVE(nextline + v, nextline + SPWORDLEN);
+		nextline_idx = v + 1;
+	    }
+	    else
+	    {
+		// Long line, use only the last SPWORDLEN bytes.
+		nextlinecol = v - SPWORDLEN;
+		mch_memmove(nextline, line + nextlinecol, SPWORDLEN);
+		nextline_idx = SPWORDLEN + 1;
+	    }
+	}
+    }
+#endif
+
+    if (wp->w_p_list)
+    {
+	if (lcs_space || lcs_trail || lcs_nbsp)
+	    extra_check = TRUE;
+	// find start of trailing whitespace
+	if (lcs_trail)
+	{
+	    trailcol = (colnr_T)STRLEN(ptr);
+	    while (trailcol > (colnr_T)0 && VIM_ISWHITE(ptr[trailcol - 1]))
+		--trailcol;
+	    trailcol += (colnr_T) (ptr - line);
+	}
+    }
+
+    wcr_attr = get_wcr_attr(wp);
+    if (wcr_attr != 0)
+    {
+	win_attr = wcr_attr;
+	area_highlighting = TRUE;
+    }
+#ifdef FEAT_TEXT_PROP
+    if (WIN_IS_POPUP(wp))
+	screen_line_flags |= SLF_POPUP;
+#endif
+
+    // 'nowrap' or 'wrap' and a single line that doesn't fit: Advance to the
+    // first character to be displayed.
+    if (wp->w_p_wrap)
+	v = wp->w_skipcol;
+    else
+	v = wp->w_leftcol;
+    if (v > 0 && !number_only)
+    {
+	char_u	*prev_ptr = ptr;
+
+	while (vcol < v && *ptr != NUL)
+	{
+	    c = win_lbr_chartabsize(wp, line, ptr, (colnr_T)vcol, NULL);
+	    vcol += c;
+	    prev_ptr = ptr;
+	    MB_PTR_ADV(ptr);
+	}
+
+	// When:
+	// - 'cuc' is set, or
+	// - 'colorcolumn' is set, or
+	// - 'virtualedit' is set, or
+	// - the visual mode is active,
+	// the end of the line may be before the start of the displayed part.
+	if (vcol < v && (
+#ifdef FEAT_SYN_HL
+	     wp->w_p_cuc || draw_color_col ||
+#endif
+	     virtual_active() ||
+	     (VIsual_active && wp->w_buffer == curwin->w_buffer)))
+	    vcol = v;
+
+	// Handle a character that's not completely on the screen: Put ptr at
+	// that character but skip the first few screen characters.
+	if (vcol > v)
+	{
+	    vcol -= c;
+	    ptr = prev_ptr;
+	    // If the character fits on the screen, don't need to skip it.
+	    // Except for a TAB.
+	    if (( (*mb_ptr2cells)(ptr) >= c || *ptr == TAB) && col == 0)
+	       n_skip = v - vcol;
+	}
+
+	// Adjust for when the inverted text is before the screen,
+	// and when the start of the inverted text is before the screen.
+	if (tocol <= vcol)
+	    fromcol = 0;
+	else if (fromcol >= 0 && fromcol < vcol)
+	    fromcol = vcol;
+
+#ifdef FEAT_LINEBREAK
+	// When w_skipcol is non-zero, first line needs 'showbreak'
+	if (wp->w_p_wrap)
+	    need_showbreak = TRUE;
+#endif
+#ifdef FEAT_SPELL
+	// When spell checking a word we need to figure out the start of the
+	// word and if it's badly spelled or not.
+	if (has_spell)
+	{
+	    int		len;
+	    colnr_T	linecol = (colnr_T)(ptr - line);
+	    hlf_T	spell_hlf = HLF_COUNT;
+
+	    pos = wp->w_cursor;
+	    wp->w_cursor.lnum = lnum;
+	    wp->w_cursor.col = linecol;
+	    len = spell_move_to(wp, FORWARD, TRUE, TRUE, &spell_hlf);
+
+	    // spell_move_to() may call ml_get() and make "line" invalid
+	    line = ml_get_buf(wp->w_buffer, lnum, FALSE);
+	    ptr = line + linecol;
+
+	    if (len == 0 || (int)wp->w_cursor.col > ptr - line)
+	    {
+		// no bad word found at line start, don't check until end of a
+		// word
+		spell_hlf = HLF_COUNT;
+		word_end = (int)(spell_to_word_end(ptr, wp) - line + 1);
+	    }
+	    else
+	    {
+		// bad word found, use attributes until end of word
+		word_end = wp->w_cursor.col + len + 1;
+
+		// Turn index into actual attributes.
+		if (spell_hlf != HLF_COUNT)
+		    spell_attr = highlight_attr[spell_hlf];
+	    }
+	    wp->w_cursor = pos;
+
+# ifdef FEAT_SYN_HL
+	    // Need to restart syntax highlighting for this line.
+	    if (has_syntax)
+		syntax_start(wp, lnum);
+# endif
+	}
+#endif
+    }
+
+    // Correct highlighting for cursor that can't be disabled.
+    // Avoids having to check this for each character.
+    if (fromcol >= 0)
+    {
+	if (noinvcur)
+	{
+	    if ((colnr_T)fromcol == wp->w_virtcol)
+	    {
+		// highlighting starts at cursor, let it start just after the
+		// cursor
+		fromcol_prev = fromcol;
+		fromcol = -1;
+	    }
+	    else if ((colnr_T)fromcol < wp->w_virtcol)
+		// restart highlighting after the cursor
+		fromcol_prev = wp->w_virtcol;
+	}
+	if (fromcol >= tocol)
+	    fromcol = -1;
+    }
+
+#ifdef FEAT_SEARCH_EXTRA
+    if (!number_only)
+    {
+	v = (long)(ptr - line);
+	area_highlighting |= prepare_search_hl_line(wp, lnum, (colnr_T)v,
+					      &line, &screen_search_hl,
+					      &search_attr);
+	ptr = line + v; // "line" may have been updated
+    }
+#endif
+
+#ifdef FEAT_SYN_HL
+    // Cursor line highlighting for 'cursorline' in the current window.
+    if (wp->w_p_cul && lnum == wp->w_cursor.lnum)
+    {
+	// Do not show the cursor line in the text when Visual mode is active,
+	// because it's not clear what is selected then.  Do update
+	// w_last_cursorline.
+	if (!(wp == curwin && VIsual_active)
+					 && wp->w_p_culopt_flags != CULOPT_NBR)
+	{
+	    cul_screenline = (wp->w_p_wrap
+				   && (wp->w_p_culopt_flags & CULOPT_SCRLINE));
+
+	    // Only set line_attr here when "screenline" is not present in
+	    // 'cursorlineopt'.  Otherwise it's done later.
+	    if (!cul_screenline)
+	    {
+		cul_attr = HL_ATTR(HLF_CUL);
+		line_attr = cul_attr;
+		wp->w_last_cursorline = wp->w_cursor.lnum;
+	    }
+	    else
+	    {
+		line_attr_save = line_attr;
+		wp->w_last_cursorline = 0;
+		margin_columns_win(wp, &left_curline_col, &right_curline_col);
+	    }
+	    area_highlighting = TRUE;
+	}
+	else
+	    wp->w_last_cursorline = wp->w_cursor.lnum;
+    }
+#endif
+
+#ifdef FEAT_TEXT_PROP
+    {
+	char_u *prop_start;
+
+	text_prop_count = get_text_props(wp->w_buffer, lnum,
+							   &prop_start, FALSE);
+	if (text_prop_count > 0)
+	{
+	    // Make a copy of the properties, so that they are properly
+	    // aligned.
+	    text_props = ALLOC_MULT(textprop_T, text_prop_count);
+	    if (text_props != NULL)
+		mch_memmove(text_props, prop_start,
+					 text_prop_count * sizeof(textprop_T));
+
+	    // Allocate an array for the indexes.
+	    text_prop_idxs = ALLOC_MULT(int, text_prop_count);
+	    area_highlighting = TRUE;
+	    extra_check = TRUE;
+	}
+    }
+#endif
+
+    off = (unsigned)(current_ScreenLine - ScreenLines);
+    col = 0;
+
+#ifdef FEAT_RIGHTLEFT
+    if (wp->w_p_rl)
+    {
+	// Rightleft window: process the text in the normal direction, but put
+	// it in current_ScreenLine[] from right to left.  Start at the
+	// rightmost column of the window.
+	col = wp->w_width - 1;
+	off += col;
+	screen_line_flags |= SLF_RIGHTLEFT;
+    }
+#endif
+
+    // Repeat for the whole displayed line.
+    for (;;)
+    {
+#if defined(FEAT_CONCEAL) || defined(FEAT_SEARCH_EXTRA)
+	int has_match_conc  = 0;	// match wants to conceal
+#endif
+#ifdef FEAT_CONCEAL
+	int did_decrement_ptr = FALSE;
+#endif
+	// Skip this quickly when working on the text.
+	if (draw_state != WL_LINE)
+	{
+#ifdef FEAT_CMDWIN
+	    if (draw_state == WL_CMDLINE - 1 && n_extra == 0)
+	    {
+		draw_state = WL_CMDLINE;
+		if (cmdwin_type != 0 && wp == curwin)
+		{
+		    // Draw the cmdline character.
+		    n_extra = 1;
+		    c_extra = cmdwin_type;
+		    c_final = NUL;
+		    char_attr = hl_combine_attr(wcr_attr, HL_ATTR(HLF_AT));
+		}
+	    }
+#endif
+
+#ifdef FEAT_FOLDING
+	    if (draw_state == WL_FOLD - 1 && n_extra == 0)
+	    {
+		int fdc = compute_foldcolumn(wp, 0);
+
+		draw_state = WL_FOLD;
+		if (fdc > 0)
+		{
+		    // Draw the 'foldcolumn'.  Allocate a buffer, "extra" may
+		    // already be in use.
+		    vim_free(p_extra_free);
+		    p_extra_free = alloc(12 + 1);
+
+		    if (p_extra_free != NULL)
+		    {
+			fill_foldcolumn(p_extra_free, wp, FALSE, lnum);
+			n_extra = fdc;
+			p_extra_free[n_extra] = NUL;
+			p_extra = p_extra_free;
+			c_extra = NUL;
+			c_final = NUL;
+			char_attr = hl_combine_attr(wcr_attr, HL_ATTR(HLF_FC));
+		    }
+		}
+	    }
+#endif
+
+#ifdef FEAT_SIGNS
+	    if (draw_state == WL_SIGN - 1 && n_extra == 0)
+	    {
+		draw_state = WL_SIGN;
+		// Show the sign column when there are any signs in this
+		// buffer or when using Netbeans.
+		if (signcolumn_on(wp))
+		    get_sign_display_info(FALSE, wp, lnum, &sattr, wcr_attr,
+			    row, startrow, filler_lines, filler_todo, &c_extra,
+			    &c_final, extra, &p_extra, &n_extra, &char_attr);
+	    }
+#endif
+
+	    if (draw_state == WL_NR - 1 && n_extra == 0)
+	    {
+		draw_state = WL_NR;
+		// Display the absolute or relative line number. After the
+		// first fill with blanks when the 'n' flag isn't in 'cpo'
+		if ((wp->w_p_nu || wp->w_p_rnu)
+			&& (row == startrow
+#ifdef FEAT_DIFF
+			    + filler_lines
+#endif
+			    || vim_strchr(p_cpo, CPO_NUMCOL) == NULL))
+		{
+#ifdef FEAT_SIGNS
+		    // If 'signcolumn' is set to 'number' and a sign is present
+		    // in 'lnum', then display the sign instead of the line
+		    // number.
+		    if ((*wp->w_p_scl == 'n' && *(wp->w_p_scl + 1) == 'u')
+			    && sign_present)
+			get_sign_display_info(TRUE, wp, lnum, &sattr, wcr_attr,
+				row, startrow, filler_lines, filler_todo,
+				&c_extra, &c_final, extra, &p_extra, &n_extra,
+				&char_attr);
+		    else
+#endif
+		    {
+		      // Draw the line number (empty space after wrapping).
+		      if (row == startrow
+#ifdef FEAT_DIFF
+			    + filler_lines
+#endif
+			    )
+		      {
+			long num;
+			char *fmt = "%*ld ";
+
+			if (wp->w_p_nu && !wp->w_p_rnu)
+			    // 'number' + 'norelativenumber'
+			    num = (long)lnum;
+			else
+			{
+			    // 'relativenumber', don't use negative numbers
+			    num = labs((long)get_cursor_rel_lnum(wp, lnum));
+			    if (num == 0 && wp->w_p_nu && wp->w_p_rnu)
+			    {
+				// 'number' + 'relativenumber'
+				num = lnum;
+				fmt = "%-*ld ";
+			    }
+			}
+
+			sprintf((char *)extra, fmt,
+						number_width(wp), num);
+			if (wp->w_skipcol > 0)
+			    for (p_extra = extra; *p_extra == ' '; ++p_extra)
+				*p_extra = '-';
+#ifdef FEAT_RIGHTLEFT
+			if (wp->w_p_rl)		    // reverse line numbers
+			{
+			    char_u	*p1, *p2;
+			    int		t;
+
+			    // like rl_mirror(), but keep the space at the end
+			    p2 = skiptowhite(extra) - 1;
+			    for (p1 = extra; p1 < p2; ++p1, --p2)
+			    {
+				t = *p1;
+				*p1 = *p2;
+				*p2 = t;
+			    }
+			}
+#endif
+			p_extra = extra;
+			c_extra = NUL;
+			c_final = NUL;
+		      }
+		      else
+		      {
+			c_extra = ' ';
+			c_final = NUL;
+		      }
+		      n_extra = number_width(wp) + 1;
+		      char_attr = hl_combine_attr(wcr_attr, HL_ATTR(HLF_N));
+#ifdef FEAT_SYN_HL
+		      // When 'cursorline' is set highlight the line number of
+		      // the current line differently.
+		      // When 'cursorlineopt' has "screenline" only highlight
+		      // the line number itself.
+		      // TODO: Can we use CursorLine instead of CursorLineNr
+		      // when CursorLineNr isn't set?
+		      if ((wp->w_p_cul || wp->w_p_rnu)
+			      && (wp->w_p_culopt_flags & CULOPT_NBR)
+			      && (row == startrow
+				  || wp->w_p_culopt_flags & CULOPT_LINE)
+			      && lnum == wp->w_cursor.lnum)
+			char_attr = hl_combine_attr(wcr_attr, HL_ATTR(HLF_CLN));
+#endif
+		    }
+		}
+	    }
+
+#ifdef FEAT_LINEBREAK
+	    if (wp->w_p_brisbr && draw_state == WL_BRI - 1
+					     && n_extra == 0 && *p_sbr != NUL)
+		// draw indent after showbreak value
+		draw_state = WL_BRI;
+	    else if (wp->w_p_brisbr && draw_state == WL_SBR && n_extra == 0)
+		// After the showbreak, draw the breakindent
+		draw_state = WL_BRI - 1;
+
+	    // draw 'breakindent': indent wrapped text accordingly
+	    if (draw_state == WL_BRI - 1 && n_extra == 0)
+	    {
+		draw_state = WL_BRI;
+		// if need_showbreak is set, breakindent also applies
+		if (wp->w_p_bri && n_extra == 0
+					 && (row != startrow || need_showbreak)
+# ifdef FEAT_DIFF
+			&& filler_lines == 0
+# endif
+		   )
+		{
+		    char_attr = 0;
+# ifdef FEAT_DIFF
+		    if (diff_hlf != (hlf_T)0)
+		    {
+			char_attr = HL_ATTR(diff_hlf);
+#  ifdef FEAT_SYN_HL
+			if (cul_attr != 0)
+			    char_attr = hl_combine_attr(char_attr, cul_attr);
+#  endif
+		    }
+# endif
+		    p_extra = NULL;
+		    c_extra = ' ';
+		    n_extra = get_breakindent_win(wp,
+				       ml_get_buf(wp->w_buffer, lnum, FALSE));
+		    // Correct end of highlighted area for 'breakindent',
+		    // required when 'linebreak' is also set.
+		    if (tocol == vcol)
+			tocol += n_extra;
+		}
+	    }
+#endif
+
+#if defined(FEAT_LINEBREAK) || defined(FEAT_DIFF)
+	    if (draw_state == WL_SBR - 1 && n_extra == 0)
+	    {
+		draw_state = WL_SBR;
+# ifdef FEAT_DIFF
+		if (filler_todo > 0)
+		{
+		    // Draw "deleted" diff line(s).
+		    if (char2cells(fill_diff) > 1)
+		    {
+			c_extra = '-';
+			c_final = NUL;
+		    }
+		    else
+		    {
+			c_extra = fill_diff;
+			c_final = NUL;
+		    }
+#  ifdef FEAT_RIGHTLEFT
+		    if (wp->w_p_rl)
+			n_extra = col + 1;
+		    else
+#  endif
+			n_extra = wp->w_width - col;
+		    char_attr = HL_ATTR(HLF_DED);
+		}
+# endif
+# ifdef FEAT_LINEBREAK
+		if (*p_sbr != NUL && need_showbreak)
+		{
+		    // Draw 'showbreak' at the start of each broken line.
+		    p_extra = p_sbr;
+		    c_extra = NUL;
+		    c_final = NUL;
+		    n_extra = (int)STRLEN(p_sbr);
+		    char_attr = HL_ATTR(HLF_AT);
+		    need_showbreak = FALSE;
+		    vcol_sbr = vcol + MB_CHARLEN(p_sbr);
+		    // Correct end of highlighted area for 'showbreak',
+		    // required when 'linebreak' is also set.
+		    if (tocol == vcol)
+			tocol += n_extra;
+		    // combine 'showbreak' with 'wincolor'
+		    if (win_attr != 0)
+			char_attr = hl_combine_attr(win_attr, char_attr);
+#  ifdef FEAT_SYN_HL
+		    // combine 'showbreak' with 'cursorline'
+		    if (cul_attr != 0)
+			char_attr = hl_combine_attr(char_attr, cul_attr);
+#  endif
+		}
+# endif
+	    }
+#endif
+
+	    if (draw_state == WL_LINE - 1 && n_extra == 0)
+	    {
+		draw_state = WL_LINE;
+		if (saved_n_extra)
+		{
+		    // Continue item from end of wrapped line.
+		    n_extra = saved_n_extra;
+		    c_extra = saved_c_extra;
+		    c_final = saved_c_final;
+		    p_extra = saved_p_extra;
+		    char_attr = saved_char_attr;
+		}
+		else
+		    char_attr = win_attr;
+	    }
+	}
+#ifdef FEAT_SYN_HL
+	if (cul_screenline)
+	{
+	    if (draw_state == WL_LINE
+		    && vcol >= left_curline_col
+		    && vcol < right_curline_col)
+	    {
+		cul_attr = HL_ATTR(HLF_CUL);
+		line_attr = cul_attr;
+	    }
+	    else
+	    {
+		cul_attr = 0;
+		line_attr = line_attr_save;
+	    }
+	}
+#endif
+
+	// When still displaying '$' of change command, stop at cursor.
+	// When only displaying the (relative) line number and that's done,
+	// stop here.
+	if ((dollar_vcol >= 0 && wp == curwin
+		   && lnum == wp->w_cursor.lnum && vcol >= (long)wp->w_virtcol
+#ifdef FEAT_DIFF
+				   && filler_todo <= 0
+#endif
+		)
+		|| (number_only && draw_state > WL_NR))
+	{
+	    screen_line(screen_row, wp->w_wincol, col, -(int)wp->w_width,
+							    screen_line_flags);
+	    // Pretend we have finished updating the window.  Except when
+	    // 'cursorcolumn' is set.
+#ifdef FEAT_SYN_HL
+	    if (wp->w_p_cuc)
+		row = wp->w_cline_row + wp->w_cline_height;
+	    else
+#endif
+		row = wp->w_height;
+	    break;
+	}
+
+	if (draw_state == WL_LINE && (area_highlighting
+#ifdef FEAT_SPELL
+		|| has_spell
+#endif
+	   ))
+	{
+	    // handle Visual or match highlighting in this line
+	    if (vcol == fromcol
+		    || (has_mbyte && vcol + 1 == fromcol && n_extra == 0
+			&& (*mb_ptr2cells)(ptr) > 1)
+		    || ((int)vcol_prev == fromcol_prev
+			&& vcol_prev < vcol	// not at margin
+			&& vcol < tocol))
+		area_attr = vi_attr;		// start highlighting
+	    else if (area_attr != 0
+		    && (vcol == tocol
+			|| (noinvcur && (colnr_T)vcol == wp->w_virtcol)))
+		area_attr = 0;			// stop highlighting
+
+#ifdef FEAT_SEARCH_EXTRA
+	    if (!n_extra)
+	    {
+		// Check for start/end of 'hlsearch' and other matches.
+		// After end, check for start/end of next match.
+		// When another match, have to check for start again.
+		v = (long)(ptr - line);
+		search_attr = update_search_hl(wp, lnum, (colnr_T)v, &line,
+				      &screen_search_hl, &has_match_conc,
+				      &match_conc, did_line_attr, lcs_eol_one);
+		ptr = line + v;  // "line" may have been changed
+	    }
+#endif
+
+#ifdef FEAT_DIFF
+	    if (diff_hlf != (hlf_T)0)
+	    {
+		if (diff_hlf == HLF_CHD && ptr - line >= change_start
+							      && n_extra == 0)
+		    diff_hlf = HLF_TXD;		// changed text
+		if (diff_hlf == HLF_TXD && ptr - line > change_end
+							      && n_extra == 0)
+		    diff_hlf = HLF_CHD;		// changed line
+		line_attr = HL_ATTR(diff_hlf);
+		if (wp->w_p_cul && lnum == wp->w_cursor.lnum
+			&& wp->w_p_culopt_flags != CULOPT_NBR
+			&& (!cul_screenline || (vcol >= left_curline_col
+						&& vcol <= right_curline_col)))
+		    line_attr = hl_combine_attr(
+					  line_attr, HL_ATTR(HLF_CUL));
+	    }
+#endif
+
+#ifdef FEAT_TEXT_PROP
+	    if (text_props != NULL)
+	    {
+		int pi;
+		int bcol = (int)(ptr - line);
+
+		if (n_extra > 0)
+		    --bcol;  // still working on the previous char, e.g. Tab
+
+		// Check if any active property ends.
+		for (pi = 0; pi < text_props_active; ++pi)
+		{
+		    int tpi = text_prop_idxs[pi];
+
+		    if (bcol >= text_props[tpi].tp_col - 1
+						  + text_props[tpi].tp_len)
+		    {
+			if (pi + 1 < text_props_active)
+			    mch_memmove(text_prop_idxs + pi,
+					text_prop_idxs + pi + 1,
+					sizeof(int)
+					 * (text_props_active - (pi + 1)));
+			--text_props_active;
+			--pi;
+		    }
+		}
+
+		// Add any text property that starts in this column.
+		while (text_prop_next < text_prop_count
+			   && bcol >= text_props[text_prop_next].tp_col - 1)
+		    text_prop_idxs[text_props_active++] = text_prop_next++;
+
+		text_prop_attr = 0;
+		text_prop_combine = FALSE;
+		if (text_props_active > 0)
+		{
+		    // Sort the properties on priority and/or starting last.
+		    // Then combine the attributes, highest priority last.
+		    current_text_props = text_props;
+		    current_buf = wp->w_buffer;
+		    qsort((void *)text_prop_idxs, (size_t)text_props_active,
+					       sizeof(int), text_prop_compare);
+
+		    for (pi = 0; pi < text_props_active; ++pi)
+		    {
+			int	    tpi = text_prop_idxs[pi];
+			proptype_T  *pt = text_prop_type_by_id(
+					wp->w_buffer, text_props[tpi].tp_type);
+
+			if (pt != NULL && pt->pt_hl_id > 0)
+			{
+			    int pt_attr = syn_id2attr(pt->pt_hl_id);
+
+			    text_prop_type = pt;
+			    text_prop_attr =
+				      hl_combine_attr(text_prop_attr, pt_attr);
+			    text_prop_combine = pt->pt_flags & PT_FLAG_COMBINE;
+			}
+		    }
+		}
+	    }
+#endif
+
+	    // Decide which of the highlight attributes to use.
+	    attr_pri = TRUE;
+#ifdef LINE_ATTR
+	    if (area_attr != 0)
+		char_attr = hl_combine_attr(line_attr, area_attr);
+	    else if (search_attr != 0)
+		char_attr = hl_combine_attr(line_attr, search_attr);
+# ifdef FEAT_TEXT_PROP
+	    else if (text_prop_type != NULL)
+	    {
+		char_attr = hl_combine_attr(
+			line_attr != 0 ? line_attr : win_attr, text_prop_attr);
+	    }
+# endif
+	    else if (line_attr != 0 && ((fromcol == -10 && tocol == MAXCOL)
+				|| vcol < fromcol || vcol_prev < fromcol_prev
+				|| vcol >= tocol))
+	    {
+		// Use line_attr when not in the Visual or 'incsearch' area
+		// (area_attr may be 0 when "noinvcur" is set).
+		char_attr = line_attr;
+		attr_pri = FALSE;
+	    }
+#else
+	    if (area_attr != 0)
+		char_attr = area_attr;
+	    else if (search_attr != 0)
+		char_attr = search_attr;
+#endif
+	    else
+	    {
+		attr_pri = FALSE;
+#ifdef FEAT_TEXT_PROP
+		if (text_prop_type != NULL)
+		{
+		    if (text_prop_combine)
+			char_attr = hl_combine_attr(
+						  syntax_attr, text_prop_attr);
+		    else
+			char_attr = hl_combine_attr(
+						  win_attr, text_prop_attr);
+		}
+		else
+#endif
+#ifdef FEAT_SYN_HL
+		if (has_syntax)
+		    char_attr = syntax_attr;
+		else
+#endif
+		    char_attr = 0;
+	    }
+	}
+	if (char_attr == 0)
+	    char_attr = win_attr;
+
+	// Get the next character to put on the screen.
+
+	// The "p_extra" points to the extra stuff that is inserted to
+	// represent special characters (non-printable stuff) and other
+	// things.  When all characters are the same, c_extra is used.
+	// If c_final is set, it will compulsorily be used at the end.
+	// "p_extra" must end in a NUL to avoid mb_ptr2len() reads past
+	// "p_extra[n_extra]".
+	// For the '$' of the 'list' option, n_extra == 1, p_extra == "".
+	if (n_extra > 0)
+	{
+	    if (c_extra != NUL || (n_extra == 1 && c_final != NUL))
+	    {
+		c = (n_extra == 1 && c_final != NUL) ? c_final : c_extra;
+		mb_c = c;	// doesn't handle non-utf-8 multi-byte!
+		if (enc_utf8 && utf_char2len(c) > 1)
+		{
+		    mb_utf8 = TRUE;
+		    u8cc[0] = 0;
+		    c = 0xc0;
+		}
+		else
+		    mb_utf8 = FALSE;
+	    }
+	    else
+	    {
+		c = *p_extra;
+		if (has_mbyte)
+		{
+		    mb_c = c;
+		    if (enc_utf8)
+		    {
+			// If the UTF-8 character is more than one byte:
+			// Decode it into "mb_c".
+			mb_l = utfc_ptr2len(p_extra);
+			mb_utf8 = FALSE;
+			if (mb_l > n_extra)
+			    mb_l = 1;
+			else if (mb_l > 1)
+			{
+			    mb_c = utfc_ptr2char(p_extra, u8cc);
+			    mb_utf8 = TRUE;
+			    c = 0xc0;
+			}
+		    }
+		    else
+		    {
+			// if this is a DBCS character, put it in "mb_c"
+			mb_l = MB_BYTE2LEN(c);
+			if (mb_l >= n_extra)
+			    mb_l = 1;
+			else if (mb_l > 1)
+			    mb_c = (c << 8) + p_extra[1];
+		    }
+		    if (mb_l == 0)  // at the NUL at end-of-line
+			mb_l = 1;
+
+		    // If a double-width char doesn't fit display a '>' in the
+		    // last column.
+		    if ((
+# ifdef FEAT_RIGHTLEFT
+			    wp->w_p_rl ? (col <= 0) :
+# endif
+				    (col >= wp->w_width - 1))
+			    && (*mb_char2cells)(mb_c) == 2)
+		    {
+			c = '>';
+			mb_c = c;
+			mb_l = 1;
+			mb_utf8 = FALSE;
+			multi_attr = HL_ATTR(HLF_AT);
+#ifdef FEAT_SYN_HL
+			if (cul_attr)
+			    multi_attr = hl_combine_attr(multi_attr, cul_attr);
+#endif
+			// put the pointer back to output the double-width
+			// character at the start of the next line.
+			++n_extra;
+			--p_extra;
+		    }
+		    else
+		    {
+			n_extra -= mb_l - 1;
+			p_extra += mb_l - 1;
+		    }
+		}
+		++p_extra;
+	    }
+	    --n_extra;
+	}
+	else
+	{
+#ifdef FEAT_LINEBREAK
+	    int c0;
+#endif
+
+	    if (p_extra_free != NULL)
+		VIM_CLEAR(p_extra_free);
+	    // Get a character from the line itself.
+	    c = *ptr;
+#ifdef FEAT_LINEBREAK
+	    c0 = *ptr;
+#endif
+	    if (has_mbyte)
+	    {
+		mb_c = c;
+		if (enc_utf8)
+		{
+		    // If the UTF-8 character is more than one byte: Decode it
+		    // into "mb_c".
+		    mb_l = utfc_ptr2len(ptr);
+		    mb_utf8 = FALSE;
+		    if (mb_l > 1)
+		    {
+			mb_c = utfc_ptr2char(ptr, u8cc);
+			// Overlong encoded ASCII or ASCII with composing char
+			// is displayed normally, except a NUL.
+			if (mb_c < 0x80)
+			{
+			    c = mb_c;
+#ifdef FEAT_LINEBREAK
+			    c0 = mb_c;
+#endif
+			}
+			mb_utf8 = TRUE;
+
+			// At start of the line we can have a composing char.
+			// Draw it as a space with a composing char.
+			if (utf_iscomposing(mb_c))
+			{
+			    int i;
+
+			    for (i = Screen_mco - 1; i > 0; --i)
+				u8cc[i] = u8cc[i - 1];
+			    u8cc[0] = mb_c;
+			    mb_c = ' ';
+			}
+		    }
+
+		    if ((mb_l == 1 && c >= 0x80)
+			    || (mb_l >= 1 && mb_c == 0)
+			    || (mb_l > 1 && (!vim_isprintc(mb_c))))
+		    {
+			// Illegal UTF-8 byte: display as <xx>.
+			// Non-BMP character : display as ? or fullwidth ?.
+			transchar_hex(extra, mb_c);
+# ifdef FEAT_RIGHTLEFT
+			if (wp->w_p_rl)		// reverse
+			    rl_mirror(extra);
+# endif
+			p_extra = extra;
+			c = *p_extra;
+			mb_c = mb_ptr2char_adv(&p_extra);
+			mb_utf8 = (c >= 0x80);
+			n_extra = (int)STRLEN(p_extra);
+			c_extra = NUL;
+			c_final = NUL;
+			if (area_attr == 0 && search_attr == 0)
+			{
+			    n_attr = n_extra + 1;
+			    extra_attr = HL_ATTR(HLF_8);
+			    saved_attr2 = char_attr; // save current attr
+			}
+		    }
+		    else if (mb_l == 0)  // at the NUL at end-of-line
+			mb_l = 1;
+#ifdef FEAT_ARABIC
+		    else if (p_arshape && !p_tbidi && ARABIC_CHAR(mb_c))
+		    {
+			// Do Arabic shaping.
+			int	pc, pc1, nc;
+			int	pcc[MAX_MCO];
+
+			// 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(ptr + mb_l);
+			    prev_c1 = u8cc[0];
+			}
+			else
+			{
+			    pc = utfc_ptr2char(ptr + mb_l, pcc);
+			    nc = prev_c;
+			    pc1 = pcc[0];
+			}
+			prev_c = mb_c;
+
+			mb_c = arabic_shape(mb_c, &c, &u8cc[0], pc, pc1, nc);
+		    }
+		    else
+			prev_c = mb_c;
+#endif
+		}
+		else	// enc_dbcs
+		{
+		    mb_l = MB_BYTE2LEN(c);
+		    if (mb_l == 0)  // at the NUL at end-of-line
+			mb_l = 1;
+		    else if (mb_l > 1)
+		    {
+			// We assume a second byte below 32 is illegal.
+			// Hopefully this is OK for all double-byte encodings!
+			if (ptr[1] >= 32)
+			    mb_c = (c << 8) + ptr[1];
+			else
+			{
+			    if (ptr[1] == NUL)
+			    {
+				// head byte at end of line
+				mb_l = 1;
+				transchar_nonprint(extra, c);
+			    }
+			    else
+			    {
+				// illegal tail byte
+				mb_l = 2;
+				STRCPY(extra, "XX");
+			    }
+			    p_extra = extra;
+			    n_extra = (int)STRLEN(extra) - 1;
+			    c_extra = NUL;
+			    c_final = NUL;
+			    c = *p_extra++;
+			    if (area_attr == 0 && search_attr == 0)
+			    {
+				n_attr = n_extra + 1;
+				extra_attr = HL_ATTR(HLF_8);
+				saved_attr2 = char_attr; // save current attr
+			    }
+			    mb_c = c;
+			}
+		    }
+		}
+		// If a double-width char doesn't fit display a '>' in the
+		// last column; the character is displayed at the start of the
+		// next line.
+		if ((
+# ifdef FEAT_RIGHTLEFT
+			    wp->w_p_rl ? (col <= 0) :
+# endif
+				(col >= wp->w_width - 1))
+			&& (*mb_char2cells)(mb_c) == 2)
+		{
+		    c = '>';
+		    mb_c = c;
+		    mb_utf8 = FALSE;
+		    mb_l = 1;
+		    multi_attr = HL_ATTR(HLF_AT);
+		    // Put pointer back so that the character will be
+		    // displayed at the start of the next line.
+		    --ptr;
+#ifdef FEAT_CONCEAL
+		    did_decrement_ptr = TRUE;
+#endif
+		}
+		else if (*ptr != NUL)
+		    ptr += mb_l - 1;
+
+		// If a double-width char doesn't fit at the left side display
+		// a '<' in the first column.  Don't do this for unprintable
+		// characters.
+		if (n_skip > 0 && mb_l > 1 && n_extra == 0)
+		{
+		    n_extra = 1;
+		    c_extra = MB_FILLER_CHAR;
+		    c_final = NUL;
+		    c = ' ';
+		    if (area_attr == 0 && search_attr == 0)
+		    {
+			n_attr = n_extra + 1;
+			extra_attr = HL_ATTR(HLF_AT);
+			saved_attr2 = char_attr; // save current attr
+		    }
+		    mb_c = c;
+		    mb_utf8 = FALSE;
+		    mb_l = 1;
+		}
+
+	    }
+	    ++ptr;
+
+	    if (extra_check)
+	    {
+#ifdef FEAT_SPELL
+		int	can_spell = TRUE;
+#endif
+
+#ifdef FEAT_TERMINAL
+		if (get_term_attr)
+		{
+		    syntax_attr = term_get_attr(wp->w_buffer, lnum, vcol);
+
+		    if (!attr_pri)
+			char_attr = syntax_attr;
+		    else
+			char_attr = hl_combine_attr(syntax_attr, char_attr);
+		}
+#endif
+
+#ifdef FEAT_SYN_HL
+		// Get syntax attribute, unless still at the start of the line
+		// (double-wide char that doesn't fit).
+		v = (long)(ptr - line);
+		if (has_syntax && v > 0)
+		{
+		    // Get the syntax attribute for the character.  If there
+		    // is an error, disable syntax highlighting.
+		    save_did_emsg = did_emsg;
+		    did_emsg = FALSE;
+
+		    syntax_attr = get_syntax_attr((colnr_T)v - 1,
+# ifdef FEAT_SPELL
+						has_spell ? &can_spell :
+# endif
+						NULL, FALSE);
+
+		    if (did_emsg)
+		    {
+			wp->w_s->b_syn_error = TRUE;
+			has_syntax = FALSE;
+			syntax_attr = 0;
+		    }
+		    else
+			did_emsg = save_did_emsg;
+
+		    // combine syntax attribute with 'wincolor'
+		    if (win_attr != 0)
+			syntax_attr = hl_combine_attr(win_attr, syntax_attr);
+
+# ifdef SYN_TIME_LIMIT
+		    if (wp->w_s->b_syn_slow)
+			has_syntax = FALSE;
+# endif
+
+		    // Need to get the line again, a multi-line regexp may
+		    // have made it invalid.
+		    line = ml_get_buf(wp->w_buffer, lnum, FALSE);
+		    ptr = line + v;
+
+# ifdef FEAT_TEXT_PROP
+		    // Text properties overrule syntax highlighting or combine.
+		    if (text_prop_attr == 0 || text_prop_combine)
+# endif
+		    {
+			int comb_attr = syntax_attr;
+# ifdef FEAT_TEXT_PROP
+			comb_attr = hl_combine_attr(text_prop_attr, comb_attr);
+# endif
+			if (!attr_pri)
+			{
+#ifdef FEAT_SYN_HL
+			    if (cul_attr)
+				char_attr = hl_combine_attr(
+							  comb_attr, cul_attr);
+			    else
+#endif
+				if (line_attr)
+				char_attr = hl_combine_attr(
+							 comb_attr, line_attr);
+			    else
+				char_attr = comb_attr;
+			}
+			else
+			    char_attr = hl_combine_attr(comb_attr, char_attr);
+		    }
+# ifdef FEAT_CONCEAL
+		    // no concealing past the end of the line, it interferes
+		    // with line highlighting
+		    if (c == NUL)
+			syntax_flags = 0;
+		    else
+			syntax_flags = get_syntax_info(&syntax_seqnr);
+# endif
+		}
+#endif
+
+#ifdef FEAT_SPELL
+		// Check spelling (unless at the end of the line).
+		// Only do this when there is no syntax highlighting, the
+		// @Spell cluster is not used or the current syntax item
+		// contains the @Spell cluster.
+		if (has_spell && v >= word_end && v > cur_checked_col)
+		{
+		    spell_attr = 0;
+		    if (c != 0 && (
+# ifdef FEAT_SYN_HL
+				!has_syntax ||
+# endif
+				can_spell))
+		    {
+			char_u	*prev_ptr, *p;
+			int	len;
+			hlf_T	spell_hlf = HLF_COUNT;
+			if (has_mbyte)
+			{
+			    prev_ptr = ptr - mb_l;
+			    v -= mb_l - 1;
+			}
+			else
+			    prev_ptr = ptr - 1;
+
+			// Use nextline[] if possible, it has the start of the
+			// next line concatenated.
+			if ((prev_ptr - line) - nextlinecol >= 0)
+			    p = nextline + (prev_ptr - line) - nextlinecol;
+			else
+			    p = prev_ptr;
+			cap_col -= (int)(prev_ptr - line);
+			len = spell_check(wp, p, &spell_hlf, &cap_col,
+								    nochange);
+			word_end = v + len;
+
+			// In Insert mode only highlight a word that
+			// doesn't touch the cursor.
+			if (spell_hlf != HLF_COUNT
+				&& (State & INSERT) != 0
+				&& wp->w_cursor.lnum == lnum
+				&& wp->w_cursor.col >=
+						    (colnr_T)(prev_ptr - line)
+				&& wp->w_cursor.col < (colnr_T)word_end)
+			{
+			    spell_hlf = HLF_COUNT;
+			    spell_redraw_lnum = lnum;
+			}
+
+			if (spell_hlf == HLF_COUNT && p != prev_ptr
+				       && (p - nextline) + len > nextline_idx)
+			{
+			    // Remember that the good word continues at the
+			    // start of the next line.
+			    checked_lnum = lnum + 1;
+			    checked_col = (int)((p - nextline) + len - nextline_idx);
+			}
+
+			// Turn index into actual attributes.
+			if (spell_hlf != HLF_COUNT)
+			    spell_attr = highlight_attr[spell_hlf];
+
+			if (cap_col > 0)
+			{
+			    if (p != prev_ptr
+				   && (p - nextline) + cap_col >= nextline_idx)
+			    {
+				// Remember that the word in the next line
+				// must start with a capital.
+				capcol_lnum = lnum + 1;
+				cap_col = (int)((p - nextline) + cap_col
+							       - nextline_idx);
+			    }
+			    else
+				// Compute the actual column.
+				cap_col += (int)(prev_ptr - line);
+			}
+		    }
+		}
+		if (spell_attr != 0)
+		{
+		    if (!attr_pri)
+			char_attr = hl_combine_attr(char_attr, spell_attr);
+		    else
+			char_attr = hl_combine_attr(spell_attr, char_attr);
+		}
+#endif
+#ifdef FEAT_LINEBREAK
+		// Found last space before word: check for line break.
+		if (wp->w_p_lbr && c0 == c
+				  && VIM_ISBREAK(c) && !VIM_ISBREAK((int)*ptr))
+		{
+		    int mb_off = has_mbyte ? (*mb_head_off)(line, ptr - 1) : 0;
+		    char_u *p = ptr - (mb_off + 1);
+
+		    // TODO: is passing p for start of the line OK?
+		    n_extra = win_lbr_chartabsize(wp, line, p, (colnr_T)vcol,
+								    NULL) - 1;
+		    if (c == TAB && n_extra + col > wp->w_width)
+# ifdef FEAT_VARTABS
+			n_extra = tabstop_padding(vcol, wp->w_buffer->b_p_ts,
+					      wp->w_buffer->b_p_vts_array) - 1;
+# else
+			n_extra = (int)wp->w_buffer->b_p_ts
+				       - vcol % (int)wp->w_buffer->b_p_ts - 1;
+# endif
+
+		    c_extra = mb_off > 0 ? MB_FILLER_CHAR : ' ';
+		    c_final = NUL;
+		    if (VIM_ISWHITE(c))
+		    {
+#ifdef FEAT_CONCEAL
+			if (c == TAB)
+			    // See "Tab alignment" below.
+			    FIX_FOR_BOGUSCOLS;
+#endif
+			if (!wp->w_p_list)
+			    c = ' ';
+		    }
+		}
+#endif
+
+		// 'list': Change char 160 to lcs_nbsp and space to lcs_space.
+		// But not when the character is followed by a composing
+		// character (use mb_l to check that).
+		if (wp->w_p_list
+			&& ((((c == 160 && mb_l == 1)
+			      || (mb_utf8
+				  && ((mb_c == 160 && mb_l == 2)
+				      || (mb_c == 0x202f && mb_l == 3))))
+			     && lcs_nbsp)
+			    || (c == ' '
+				&& mb_l == 1
+				&& lcs_space
+				&& ptr - line <= trailcol)))
+		{
+		    c = (c == ' ') ? lcs_space : lcs_nbsp;
+		    if (area_attr == 0 && search_attr == 0)
+		    {
+			n_attr = 1;
+			extra_attr = HL_ATTR(HLF_8);
+			saved_attr2 = char_attr; // save current attr
+		    }
+		    mb_c = c;
+		    if (enc_utf8 && utf_char2len(c) > 1)
+		    {
+			mb_utf8 = TRUE;
+			u8cc[0] = 0;
+			c = 0xc0;
+		    }
+		    else
+			mb_utf8 = FALSE;
+		}
+
+		if (trailcol != MAXCOL && ptr > line + trailcol && c == ' ')
+		{
+		    c = lcs_trail;
+		    if (!attr_pri)
+		    {
+			n_attr = 1;
+			extra_attr = HL_ATTR(HLF_8);
+			saved_attr2 = char_attr; // save current attr
+		    }
+		    mb_c = c;
+		    if (enc_utf8 && utf_char2len(c) > 1)
+		    {
+			mb_utf8 = TRUE;
+			u8cc[0] = 0;
+			c = 0xc0;
+		    }
+		    else
+			mb_utf8 = FALSE;
+		}
+	    }
+
+	    // Handling of non-printable characters.
+	    if (!vim_isprintc(c))
+	    {
+		// when getting a character from the file, we may have to
+		// turn it into something else on the way to putting it
+		// into "ScreenLines".
+		if (c == TAB && (!wp->w_p_list || lcs_tab1))
+		{
+		    int tab_len = 0;
+		    long vcol_adjusted = vcol; // removed showbreak length
+#ifdef FEAT_LINEBREAK
+		    // only adjust the tab_len, when at the first column
+		    // after the showbreak value was drawn
+		    if (*p_sbr != NUL && vcol == vcol_sbr && wp->w_p_wrap)
+			vcol_adjusted = vcol - MB_CHARLEN(p_sbr);
+#endif
+		    // tab amount depends on current column
+#ifdef FEAT_VARTABS
+		    tab_len = tabstop_padding(vcol_adjusted,
+					      wp->w_buffer->b_p_ts,
+					      wp->w_buffer->b_p_vts_array) - 1;
+#else
+		    tab_len = (int)wp->w_buffer->b_p_ts
+			       - vcol_adjusted % (int)wp->w_buffer->b_p_ts - 1;
+#endif
+
+#ifdef FEAT_LINEBREAK
+		    if (!wp->w_p_lbr || !wp->w_p_list)
+#endif
+			// tab amount depends on current column
+			n_extra = tab_len;
+#ifdef FEAT_LINEBREAK
+		    else
+		    {
+			char_u	*p;
+			int	len;
+			int	i;
+			int	saved_nextra = n_extra;
+
+#ifdef FEAT_CONCEAL
+			if (vcol_off > 0)
+			    // there are characters to conceal
+			    tab_len += vcol_off;
+			// boguscols before FIX_FOR_BOGUSCOLS macro from above
+			if (wp->w_p_list && lcs_tab1 && old_boguscols > 0
+							 && n_extra > tab_len)
+			    tab_len += n_extra - tab_len;
+#endif
+
+			// if n_extra > 0, it gives the number of chars, to
+			// use for a tab, else we need to calculate the width
+			// for a tab
+			len = (tab_len * mb_char2len(lcs_tab2));
+			if (n_extra > 0)
+			    len += n_extra - tab_len;
+			c = lcs_tab1;
+			p = alloc(len + 1);
+			vim_memset(p, ' ', len);
+			p[len] = NUL;
+			vim_free(p_extra_free);
+			p_extra_free = p;
+			for (i = 0; i < tab_len; i++)
+			{
+			    int lcs = lcs_tab2;
+
+			    if (*p == NUL)
+			    {
+				tab_len = i;
+				break;
+			    }
+
+			    // if lcs_tab3 is given, need to change the char
+			    // for tab
+			    if (lcs_tab3 && i == tab_len - 1)
+				lcs = lcs_tab3;
+			    mb_char2bytes(lcs, p);
+			    p += mb_char2len(lcs);
+			    n_extra += mb_char2len(lcs)
+						  - (saved_nextra > 0 ? 1 : 0);
+			}
+			p_extra = p_extra_free;
+#ifdef FEAT_CONCEAL
+			// n_extra will be increased by FIX_FOX_BOGUSCOLS
+			// macro below, so need to adjust for that here
+			if (vcol_off > 0)
+			    n_extra -= vcol_off;
+#endif
+		    }
+#endif
+#ifdef FEAT_CONCEAL
+		    {
+			int vc_saved = vcol_off;
+
+			// Tab alignment should be identical regardless of
+			// 'conceallevel' value. So tab compensates of all
+			// previous concealed characters, and thus resets
+			// vcol_off and boguscols accumulated so far in the
+			// line. Note that the tab can be longer than
+			// 'tabstop' when there are concealed characters.
+			FIX_FOR_BOGUSCOLS;
+
+			// Make sure, the highlighting for the tab char will be
+			// correctly set further below (effectively reverts the
+			// FIX_FOR_BOGSUCOLS macro
+			if (n_extra == tab_len + vc_saved && wp->w_p_list
+								  && lcs_tab1)
+			    tab_len += vc_saved;
+		    }
+#endif
+		    mb_utf8 = FALSE;	// don't draw as UTF-8
+		    if (wp->w_p_list)
+		    {
+			c = (n_extra == 0 && lcs_tab3) ? lcs_tab3 : lcs_tab1;
+#ifdef FEAT_LINEBREAK
+			if (wp->w_p_lbr)
+			    c_extra = NUL; // using p_extra from above
+			else
+#endif
+			    c_extra = lcs_tab2;
+			c_final = lcs_tab3;
+			n_attr = tab_len + 1;
+			extra_attr = HL_ATTR(HLF_8);
+			saved_attr2 = char_attr; // save current attr
+			mb_c = c;
+			if (enc_utf8 && utf_char2len(c) > 1)
+			{
+			    mb_utf8 = TRUE;
+			    u8cc[0] = 0;
+			    c = 0xc0;
+			}
+		    }
+		    else
+		    {
+			c_final = NUL;
+			c_extra = ' ';
+			c = ' ';
+		    }
+		}
+		else if (c == NUL
+			&& (wp->w_p_list
+			    || ((fromcol >= 0 || fromcol_prev >= 0)
+				&& tocol > vcol
+				&& VIsual_mode != Ctrl_V
+				&& (
+# ifdef FEAT_RIGHTLEFT
+				    wp->w_p_rl ? (col >= 0) :
+# endif
+				    (col < wp->w_width))
+				&& !(noinvcur
+				    && lnum == wp->w_cursor.lnum
+				    && (colnr_T)vcol == wp->w_virtcol)))
+			&& lcs_eol_one > 0)
+		{
+		    // Display a '$' after the line or highlight an extra
+		    // character if the line break is included.
+#if defined(FEAT_DIFF) || defined(LINE_ATTR)
+		    // For a diff line the highlighting continues after the
+		    // "$".
+		    if (
+# ifdef FEAT_DIFF
+			    diff_hlf == (hlf_T)0
+#  ifdef LINE_ATTR
+			    &&
+#  endif
+# endif
+# ifdef LINE_ATTR
+			    line_attr == 0
+# endif
+		       )
+#endif
+		    {
+			// In virtualedit, visual selections may extend
+			// beyond end of line.
+			if (area_highlighting && virtual_active()
+				&& tocol != MAXCOL && vcol < tocol)
+			    n_extra = 0;
+			else
+			{
+			    p_extra = at_end_str;
+			    n_extra = 1;
+			    c_extra = NUL;
+			    c_final = NUL;
+			}
+		    }
+		    if (wp->w_p_list && lcs_eol > 0)
+			c = lcs_eol;
+		    else
+			c = ' ';
+		    lcs_eol_one = -1;
+		    --ptr;	    // put it back at the NUL
+		    if (!attr_pri)
+		    {
+			extra_attr = HL_ATTR(HLF_AT);
+			n_attr = 1;
+		    }
+		    mb_c = c;
+		    if (enc_utf8 && utf_char2len(c) > 1)
+		    {
+			mb_utf8 = TRUE;
+			u8cc[0] = 0;
+			c = 0xc0;
+		    }
+		    else
+			mb_utf8 = FALSE;	// don't draw as UTF-8
+		}
+		else if (c != NUL)
+		{
+		    p_extra = transchar(c);
+		    if (n_extra == 0)
+			n_extra = byte2cells(c) - 1;
+#ifdef FEAT_RIGHTLEFT
+		    if ((dy_flags & DY_UHEX) && wp->w_p_rl)
+			rl_mirror(p_extra);	// reverse "<12>"
+#endif
+		    c_extra = NUL;
+		    c_final = NUL;
+#ifdef FEAT_LINEBREAK
+		    if (wp->w_p_lbr)
+		    {
+			char_u *p;
+
+			c = *p_extra;
+			p = alloc(n_extra + 1);
+			vim_memset(p, ' ', n_extra);
+			STRNCPY(p, p_extra + 1, STRLEN(p_extra) - 1);
+			p[n_extra] = NUL;
+			vim_free(p_extra_free);
+			p_extra_free = p_extra = p;
+		    }
+		    else
+#endif
+		    {
+			n_extra = byte2cells(c) - 1;
+			c = *p_extra++;
+		    }
+		    if (!attr_pri)
+		    {
+			n_attr = n_extra + 1;
+			extra_attr = HL_ATTR(HLF_8);
+			saved_attr2 = char_attr; // save current attr
+		    }
+		    mb_utf8 = FALSE;	// don't draw as UTF-8
+		}
+		else if (VIsual_active
+			 && (VIsual_mode == Ctrl_V
+			     || VIsual_mode == 'v')
+			 && virtual_active()
+			 && tocol != MAXCOL
+			 && vcol < tocol
+			 && (
+#ifdef FEAT_RIGHTLEFT
+			    wp->w_p_rl ? (col >= 0) :
+#endif
+			    (col < wp->w_width)))
+		{
+		    c = ' ';
+		    --ptr;	    // put it back at the NUL
+		}
+#if defined(LINE_ATTR)
+		else if ((
+# ifdef FEAT_DIFF
+			    diff_hlf != (hlf_T)0 ||
+# endif
+# ifdef FEAT_TERMINAL
+			    win_attr != 0 ||
+# endif
+			    line_attr != 0
+			) && (
+# ifdef FEAT_RIGHTLEFT
+			    wp->w_p_rl ? (col >= 0) :
+# endif
+			    (col
+# ifdef FEAT_CONCEAL
+				- boguscols
+# endif
+					    < wp->w_width)))
+		{
+		    // Highlight until the right side of the window
+		    c = ' ';
+		    --ptr;	    // put it back at the NUL
+
+		    // Remember we do the char for line highlighting.
+		    ++did_line_attr;
+
+		    // don't do search HL for the rest of the line
+		    if (line_attr != 0 && char_attr == search_attr
+					&& (did_line_attr > 1
+					    || (wp->w_p_list && lcs_eol > 0)))
+			char_attr = line_attr;
+# ifdef FEAT_DIFF
+		    if (diff_hlf == HLF_TXD)
+		    {
+			diff_hlf = HLF_CHD;
+			if (vi_attr == 0 || char_attr != vi_attr)
+			{
+			    char_attr = HL_ATTR(diff_hlf);
+			    if (wp->w_p_cul && lnum == wp->w_cursor.lnum
+				    && wp->w_p_culopt_flags != CULOPT_NBR
+				    && (!cul_screenline
+					|| (vcol >= left_curline_col
+						 && vcol <= right_curline_col)))
+				char_attr = hl_combine_attr(
+					  char_attr, HL_ATTR(HLF_CUL));
+			}
+		    }
+# endif
+# ifdef FEAT_TERMINAL
+		    if (win_attr != 0)
+		    {
+			char_attr = win_attr;
+			if (wp->w_p_cul && lnum == wp->w_cursor.lnum)
+			{
+			    if (!cul_screenline || (vcol >= left_curline_col
+						  && vcol <= right_curline_col))
+				char_attr = hl_combine_attr(
+					      char_attr, HL_ATTR(HLF_CUL));
+			}
+			else if (line_attr)
+			    char_attr = hl_combine_attr(char_attr, line_attr);
+		    }
+# endif
+		}
+#endif
+	    }
+
+#ifdef FEAT_CONCEAL
+	    if (   wp->w_p_cole > 0
+		&& (wp != curwin || lnum != wp->w_cursor.lnum ||
+						       conceal_cursor_line(wp))
+		&& ((syntax_flags & HL_CONCEAL) != 0 || has_match_conc > 0)
+		&& !(lnum_in_visual_area
+				    && vim_strchr(wp->w_p_cocu, 'v') == NULL))
+	    {
+		char_attr = conceal_attr;
+		if ((prev_syntax_id != syntax_seqnr || has_match_conc > 1)
+			&& (syn_get_sub_char() != NUL || match_conc
+							 || wp->w_p_cole == 1)
+			&& wp->w_p_cole != 3)
+		{
+		    // First time at this concealed item: display one
+		    // character.
+		    if (match_conc)
+			c = match_conc;
+		    else if (syn_get_sub_char() != NUL)
+			c = syn_get_sub_char();
+		    else if (lcs_conceal != NUL)
+			c = lcs_conceal;
+		    else
+			c = ' ';
+
+		    prev_syntax_id = syntax_seqnr;
+
+		    if (n_extra > 0)
+			vcol_off += n_extra;
+		    vcol += n_extra;
+		    if (wp->w_p_wrap && n_extra > 0)
+		    {
+# ifdef FEAT_RIGHTLEFT
+			if (wp->w_p_rl)
+			{
+			    col -= n_extra;
+			    boguscols -= n_extra;
+			}
+			else
+# endif
+			{
+			    boguscols += n_extra;
+			    col += n_extra;
+			}
+		    }
+		    n_extra = 0;
+		    n_attr = 0;
+		}
+		else if (n_skip == 0)
+		{
+		    is_concealing = TRUE;
+		    n_skip = 1;
+		}
+		mb_c = c;
+		if (enc_utf8 && utf_char2len(c) > 1)
+		{
+		    mb_utf8 = TRUE;
+		    u8cc[0] = 0;
+		    c = 0xc0;
+		}
+		else
+		    mb_utf8 = FALSE;	// don't draw as UTF-8
+	    }
+	    else
+	    {
+		prev_syntax_id = 0;
+		is_concealing = FALSE;
+	    }
+
+	    if (n_skip > 0 && did_decrement_ptr)
+		// not showing the '>', put pointer back to avoid getting stuck
+		++ptr;
+
+#endif // FEAT_CONCEAL
+	}
+
+#ifdef FEAT_CONCEAL
+	// In the cursor line and we may be concealing characters: correct
+	// the cursor column when we reach its position.
+	if (!did_wcol && draw_state == WL_LINE
+		&& wp == curwin && lnum == wp->w_cursor.lnum
+		&& conceal_cursor_line(wp)
+		&& (int)wp->w_virtcol <= vcol + n_skip)
+	{
+#  ifdef FEAT_RIGHTLEFT
+	    if (wp->w_p_rl)
+		wp->w_wcol = wp->w_width - col + boguscols - 1;
+	    else
+#  endif
+		wp->w_wcol = col - boguscols;
+	    wp->w_wrow = row;
+	    did_wcol = TRUE;
+	    curwin->w_valid |= VALID_WCOL|VALID_WROW|VALID_VIRTCOL;
+	}
+#endif
+
+	// Don't override visual selection highlighting.
+	if (n_attr > 0
+		&& draw_state == WL_LINE
+		&& !attr_pri)
+	{
+#ifdef LINE_ATTR
+	    if (line_attr)
+		char_attr = hl_combine_attr(extra_attr, line_attr);
+	    else
+#endif
+		char_attr = extra_attr;
+	}
+
+#if defined(FEAT_XIM) && defined(FEAT_GUI_GTK)
+	// XIM don't send preedit_start and preedit_end, but they send
+	// preedit_changed and commit.  Thus Vim can't set "im_is_active", use
+	// im_is_preediting() here.
+	if (p_imst == IM_ON_THE_SPOT
+		&& xic != NULL
+		&& lnum == wp->w_cursor.lnum
+		&& (State & INSERT)
+		&& !p_imdisable
+		&& im_is_preediting()
+		&& draw_state == WL_LINE)
+	{
+	    colnr_T tcol;
+
+	    if (preedit_end_col == MAXCOL)
+		getvcol(curwin, &(wp->w_cursor), &tcol, NULL, NULL);
+	    else
+		tcol = preedit_end_col;
+	    if ((long)preedit_start_col <= vcol && vcol < (long)tcol)
+	    {
+		if (feedback_old_attr < 0)
+		{
+		    feedback_col = 0;
+		    feedback_old_attr = char_attr;
+		}
+		char_attr = im_get_feedback_attr(feedback_col);
+		if (char_attr < 0)
+		    char_attr = feedback_old_attr;
+		feedback_col++;
+	    }
+	    else if (feedback_old_attr >= 0)
+	    {
+		char_attr = feedback_old_attr;
+		feedback_old_attr = -1;
+		feedback_col = 0;
+	    }
+	}
+#endif
+	// Handle the case where we are in column 0 but not on the first
+	// character of the line and the user wants us to show us a
+	// special character (via 'listchars' option "precedes:<char>".
+	if (lcs_prec_todo != NUL
+		&& wp->w_p_list
+		&& (wp->w_p_wrap ? wp->w_skipcol > 0 : wp->w_leftcol > 0)
+#ifdef FEAT_DIFF
+		&& filler_todo <= 0
+#endif
+		&& draw_state > WL_NR
+		&& c != NUL)
+	{
+	    c = lcs_prec;
+	    lcs_prec_todo = NUL;
+	    if (has_mbyte && (*mb_char2cells)(mb_c) > 1)
+	    {
+		// Double-width character being overwritten by the "precedes"
+		// character, need to fill up half the character.
+		c_extra = MB_FILLER_CHAR;
+		c_final = NUL;
+		n_extra = 1;
+		n_attr = 2;
+		extra_attr = HL_ATTR(HLF_AT);
+	    }
+	    mb_c = c;
+	    if (enc_utf8 && utf_char2len(c) > 1)
+	    {
+		mb_utf8 = TRUE;
+		u8cc[0] = 0;
+		c = 0xc0;
+	    }
+	    else
+		mb_utf8 = FALSE;	// don't draw as UTF-8
+	    if (!attr_pri)
+	    {
+		saved_attr3 = char_attr; // save current attr
+		char_attr = HL_ATTR(HLF_AT); // later copied to char_attr
+		n_attr3 = 1;
+	    }
+	}
+
+	// At end of the text line or just after the last character.
+	if ((c == NUL
+#if defined(LINE_ATTR)
+		|| did_line_attr == 1
+#endif
+		) && eol_hl_off == 0)
+	{
+#ifdef FEAT_SEARCH_EXTRA
+	    // flag to indicate whether prevcol equals startcol of search_hl or
+	    // one of the matches
+	    int prevcol_hl_flag = get_prevcol_hl_flag(wp, &screen_search_hl,
+					      (long)(ptr - line) - (c == NUL));
+#endif
+	    // 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!)  Not
+	    // needed when a '$' was displayed for 'list'.
+	    if (lcs_eol == lcs_eol_one
+		    && ((area_attr != 0 && vcol == fromcol
+			    && (VIsual_mode != Ctrl_V
+				|| lnum == VIsual.lnum
+				|| lnum == curwin->w_cursor.lnum)
+			    && c == NUL)
+#ifdef FEAT_SEARCH_EXTRA
+			// highlight 'hlsearch' match at end of line
+			|| (prevcol_hl_flag
+# ifdef FEAT_SYN_HL
+			    && !(wp->w_p_cul && lnum == wp->w_cursor.lnum
+				    && !(wp == curwin && VIsual_active))
+# endif
+# ifdef FEAT_DIFF
+			    && diff_hlf == (hlf_T)0
+# endif
+# if defined(LINE_ATTR)
+			    && did_line_attr <= 1
+# endif
+			   )
+#endif
+		       ))
+	    {
+		int n = 0;
+
+#ifdef FEAT_RIGHTLEFT
+		if (wp->w_p_rl)
+		{
+		    if (col < 0)
+			n = 1;
+		}
+		else
+#endif
+		{
+		    if (col >= wp->w_width)
+			n = -1;
+		}
+		if (n != 0)
+		{
+		    // At the window boundary, highlight the last character
+		    // instead (better than nothing).
+		    off += n;
+		    col += n;
+		}
+		else
+		{
+		    // Add a blank character to highlight.
+		    ScreenLines[off] = ' ';
+		    if (enc_utf8)
+			ScreenLinesUC[off] = 0;
+		}
+#ifdef FEAT_SEARCH_EXTRA
+		if (area_attr == 0)
+		{
+		    // Use attributes from match with highest priority among
+		    // 'search_hl' and the match list.
+		    get_search_match_hl(wp, &screen_search_hl,
+					       (long)(ptr - line), &char_attr);
+		}
+#endif
+		ScreenAttrs[off] = char_attr;
+#ifdef FEAT_RIGHTLEFT
+		if (wp->w_p_rl)
+		{
+		    --col;
+		    --off;
+		}
+		else
+#endif
+		{
+		    ++col;
+		    ++off;
+		}
+		++vcol;
+		eol_hl_off = 1;
+	    }
+	}
+
+	// At end of the text line.
+	if (c == NUL)
+	{
+#ifdef FEAT_SYN_HL
+	    // Highlight 'cursorcolumn' & 'colorcolumn' past end of the line.
+	    if (wp->w_p_wrap)
+		v = wp->w_skipcol;
+	    else
+		v = wp->w_leftcol;
+
+	    // check if line ends before left margin
+	    if (vcol < v + col - win_col_off(wp))
+		vcol = v + col - win_col_off(wp);
+#ifdef FEAT_CONCEAL
+	    // Get rid of the boguscols now, we want to draw until the right
+	    // edge for 'cursorcolumn'.
+	    col -= boguscols;
+	    boguscols = 0;
+#endif
+
+	    if (draw_color_col)
+		draw_color_col = advance_color_col(VCOL_HLC, &color_cols);
+
+	    if (((wp->w_p_cuc
+		      && (int)wp->w_virtcol >= VCOL_HLC - eol_hl_off
+		      && (int)wp->w_virtcol <
+					wp->w_width * (row - startrow + 1) + v
+		      && lnum != wp->w_cursor.lnum)
+		    || draw_color_col
+		    || win_attr != 0)
+# ifdef FEAT_RIGHTLEFT
+		    && !wp->w_p_rl
+# endif
+		    )
+	    {
+		int	rightmost_vcol = 0;
+		int	i;
+
+		if (wp->w_p_cuc)
+		    rightmost_vcol = wp->w_virtcol;
+		if (draw_color_col)
+		    // determine rightmost colorcolumn to possibly draw
+		    for (i = 0; color_cols[i] >= 0; ++i)
+			if (rightmost_vcol < color_cols[i])
+			    rightmost_vcol = color_cols[i];
+
+		while (col < wp->w_width)
+		{
+		    ScreenLines[off] = ' ';
+		    if (enc_utf8)
+			ScreenLinesUC[off] = 0;
+		    ++col;
+		    if (draw_color_col)
+			draw_color_col = advance_color_col(VCOL_HLC,
+								 &color_cols);
+
+		    if (wp->w_p_cuc && VCOL_HLC == (long)wp->w_virtcol)
+			ScreenAttrs[off++] = HL_ATTR(HLF_CUC);
+		    else if (draw_color_col && VCOL_HLC == *color_cols)
+			ScreenAttrs[off++] = HL_ATTR(HLF_MC);
+		    else
+			ScreenAttrs[off++] = win_attr;
+
+		    if (VCOL_HLC >= rightmost_vcol && win_attr == 0)
+			break;
+
+		    ++vcol;
+		}
+	    }
+#endif
+
+	    screen_line(screen_row, wp->w_wincol, col,
+					  (int)wp->w_width, screen_line_flags);
+	    row++;
+
+	    // Update w_cline_height and w_cline_folded if the cursor line was
+	    // updated (saves a call to plines() later).
+	    if (wp == curwin && lnum == curwin->w_cursor.lnum)
+	    {
+		curwin->w_cline_row = startrow;
+		curwin->w_cline_height = row - startrow;
+#ifdef FEAT_FOLDING
+		curwin->w_cline_folded = FALSE;
+#endif
+		curwin->w_valid |= (VALID_CHEIGHT|VALID_CROW);
+	    }
+
+	    break;
+	}
+
+	// Show "extends" character from 'listchars' if beyond the line end and
+	// 'list' is set.
+	if (lcs_ext != NUL
+		&& wp->w_p_list
+		&& !wp->w_p_wrap
+#ifdef FEAT_DIFF
+		&& filler_todo <= 0
+#endif
+		&& (
+#ifdef FEAT_RIGHTLEFT
+		    wp->w_p_rl ? col == 0 :
+#endif
+		    col == wp->w_width - 1)
+		&& (*ptr != NUL
+		    || (wp->w_p_list && lcs_eol_one > 0)
+		    || (n_extra && (c_extra != NUL || *p_extra != NUL))))
+	{
+	    c = lcs_ext;
+	    char_attr = HL_ATTR(HLF_AT);
+	    mb_c = c;
+	    if (enc_utf8 && utf_char2len(c) > 1)
+	    {
+		mb_utf8 = TRUE;
+		u8cc[0] = 0;
+		c = 0xc0;
+	    }
+	    else
+		mb_utf8 = FALSE;
+	}
+
+#ifdef FEAT_SYN_HL
+	// advance to the next 'colorcolumn'
+	if (draw_color_col)
+	    draw_color_col = advance_color_col(VCOL_HLC, &color_cols);
+
+	// Highlight the cursor column if 'cursorcolumn' is set.  But don't
+	// highlight the cursor position itself.
+	// Also highlight the 'colorcolumn' if it is different than
+	// 'cursorcolumn'
+	vcol_save_attr = -1;
+	if (draw_state == WL_LINE && !lnum_in_visual_area
+		&& search_attr == 0 && area_attr == 0)
+	{
+	    if (wp->w_p_cuc && VCOL_HLC == (long)wp->w_virtcol
+						 && lnum != wp->w_cursor.lnum)
+	    {
+		vcol_save_attr = char_attr;
+		char_attr = hl_combine_attr(char_attr, HL_ATTR(HLF_CUC));
+	    }
+	    else if (draw_color_col && VCOL_HLC == *color_cols)
+	    {
+		vcol_save_attr = char_attr;
+		char_attr = hl_combine_attr(char_attr, HL_ATTR(HLF_MC));
+	    }
+	}
+#endif
+
+	// Store character to be displayed.
+	// Skip characters that are left of the screen for 'nowrap'.
+	vcol_prev = vcol;
+	if (draw_state < WL_LINE || n_skip <= 0)
+	{
+	    // Store the character.
+#if defined(FEAT_RIGHTLEFT)
+	    if (has_mbyte && wp->w_p_rl && (*mb_char2cells)(mb_c) > 1)
+	    {
+		// A double-wide character is: put first halve in left cell.
+		--off;
+		--col;
+	    }
+#endif
+	    ScreenLines[off] = c;
+	    if (enc_dbcs == DBCS_JPNU)
+	    {
+		if ((mb_c & 0xff00) == 0x8e00)
+		    ScreenLines[off] = 0x8e;
+		ScreenLines2[off] = mb_c & 0xff;
+	    }
+	    else if (enc_utf8)
+	    {
+		if (mb_utf8)
+		{
+		    int i;
+
+		    ScreenLinesUC[off] = mb_c;
+		    if ((c & 0xff) == 0)
+			ScreenLines[off] = 0x80;   // avoid storing zero
+		    for (i = 0; i < Screen_mco; ++i)
+		    {
+			ScreenLinesC[i][off] = u8cc[i];
+			if (u8cc[i] == 0)
+			    break;
+		    }
+		}
+		else
+		    ScreenLinesUC[off] = 0;
+	    }
+	    if (multi_attr)
+	    {
+		ScreenAttrs[off] = multi_attr;
+		multi_attr = 0;
+	    }
+	    else
+		ScreenAttrs[off] = char_attr;
+
+	    if (has_mbyte && (*mb_char2cells)(mb_c) > 1)
+	    {
+		// Need to fill two screen columns.
+		++off;
+		++col;
+		if (enc_utf8)
+		    // UTF-8: Put a 0 in the second screen char.
+		    ScreenLines[off] = 0;
+		else
+		    // DBCS: Put second byte in the second screen char.
+		    ScreenLines[off] = mb_c & 0xff;
+		if (draw_state > WL_NR
+#ifdef FEAT_DIFF
+			&& filler_todo <= 0
+#endif
+			)
+		    ++vcol;
+		// When "tocol" is halfway a character, set it to the end of
+		// the character, otherwise highlighting won't stop.
+		if (tocol == vcol)
+		    ++tocol;
+#ifdef FEAT_RIGHTLEFT
+		if (wp->w_p_rl)
+		{
+		    // now it's time to backup one cell
+		    --off;
+		    --col;
+		}
+#endif
+	    }
+#ifdef FEAT_RIGHTLEFT
+	    if (wp->w_p_rl)
+	    {
+		--off;
+		--col;
+	    }
+	    else
+#endif
+	    {
+		++off;
+		++col;
+	    }
+	}
+#ifdef FEAT_CONCEAL
+	else if (wp->w_p_cole > 0 && is_concealing)
+	{
+	    --n_skip;
+	    ++vcol_off;
+	    if (n_extra > 0)
+		vcol_off += n_extra;
+	    if (wp->w_p_wrap)
+	    {
+		// Special voodoo required if 'wrap' is on.
+		//
+		// Advance the column indicator to force the line
+		// drawing to wrap early. This will make the line
+		// take up the same screen space when parts are concealed,
+		// so that cursor line computations aren't messed up.
+		//
+		// To avoid the fictitious advance of 'col' causing
+		// trailing junk to be written out of the screen line
+		// we are building, 'boguscols' keeps track of the number
+		// of bad columns we have advanced.
+		if (n_extra > 0)
+		{
+		    vcol += n_extra;
+# ifdef FEAT_RIGHTLEFT
+		    if (wp->w_p_rl)
+		    {
+			col -= n_extra;
+			boguscols -= n_extra;
+		    }
+		    else
+# endif
+		    {
+			col += n_extra;
+			boguscols += n_extra;
+		    }
+		    n_extra = 0;
+		    n_attr = 0;
+		}
+
+
+		if (has_mbyte && (*mb_char2cells)(mb_c) > 1)
+		{
+		    // Need to fill two screen columns.
+# ifdef FEAT_RIGHTLEFT
+		    if (wp->w_p_rl)
+		    {
+			--boguscols;
+			--col;
+		    }
+		    else
+# endif
+		    {
+			++boguscols;
+			++col;
+		    }
+		}
+
+# ifdef FEAT_RIGHTLEFT
+		if (wp->w_p_rl)
+		{
+		    --boguscols;
+		    --col;
+		}
+		else
+# endif
+		{
+		    ++boguscols;
+		    ++col;
+		}
+	    }
+	    else
+	    {
+		if (n_extra > 0)
+		{
+		    vcol += n_extra;
+		    n_extra = 0;
+		    n_attr = 0;
+		}
+	    }
+
+	}
+#endif // FEAT_CONCEAL
+	else
+	    --n_skip;
+
+	// Only advance the "vcol" when after the 'number' or 'relativenumber'
+	// column.
+	if (draw_state > WL_NR
+#ifdef FEAT_DIFF
+		&& filler_todo <= 0
+#endif
+		)
+	    ++vcol;
+
+#ifdef FEAT_SYN_HL
+	if (vcol_save_attr >= 0)
+	    char_attr = vcol_save_attr;
+#endif
+
+	// restore attributes after "predeces" in 'listchars'
+	if (draw_state > WL_NR && n_attr3 > 0 && --n_attr3 == 0)
+	    char_attr = saved_attr3;
+
+	// restore attributes after last 'listchars' or 'number' char
+	if (n_attr > 0 && draw_state == WL_LINE && --n_attr == 0)
+	    char_attr = saved_attr2;
+
+	// At end of screen line and there is more to come: Display the line
+	// so far.  If there is no more to display it is caught above.
+	if ((
+#ifdef FEAT_RIGHTLEFT
+	    wp->w_p_rl ? (col < 0) :
+#endif
+				    (col >= wp->w_width))
+		&& (*ptr != NUL
+#ifdef FEAT_DIFF
+		    || filler_todo > 0
+#endif
+		    || (wp->w_p_list && lcs_eol != NUL && p_extra != at_end_str)
+		    || (n_extra != 0 && (c_extra != NUL || *p_extra != NUL)))
+		)
+	{
+#ifdef FEAT_CONCEAL
+	    screen_line(screen_row, wp->w_wincol, col - boguscols,
+					  (int)wp->w_width, screen_line_flags);
+	    boguscols = 0;
+#else
+	    screen_line(screen_row, wp->w_wincol, col,
+					  (int)wp->w_width, screen_line_flags);
+#endif
+	    ++row;
+	    ++screen_row;
+
+	    // When not wrapping and finished diff lines, or when displayed
+	    // '$' and highlighting until last column, break here.
+	    if ((!wp->w_p_wrap
+#ifdef FEAT_DIFF
+		    && filler_todo <= 0
+#endif
+		    ) || lcs_eol_one == -1)
+		break;
+
+	    // When the window is too narrow draw all "@" lines.
+	    if (draw_state != WL_LINE
+#ifdef FEAT_DIFF
+		    && filler_todo <= 0
+#endif
+		    )
+	    {
+		win_draw_end(wp, '@', ' ', TRUE, row, wp->w_height, HLF_AT);
+		draw_vsep_win(wp, row);
+		row = endrow;
+	    }
+
+	    // When line got too long for screen break here.
+	    if (row == endrow)
+	    {
+		++row;
+		break;
+	    }
+
+	    if (screen_cur_row == screen_row - 1
+#ifdef FEAT_DIFF
+		     && filler_todo <= 0
+#endif
+		     && wp->w_width == Columns)
+	    {
+		// Remember that the line wraps, used for modeless copy.
+		LineWraps[screen_row - 1] = TRUE;
+
+		// Special trick to make copy/paste of wrapped lines work with
+		// xterm/screen: write an extra character beyond the end of
+		// the line. This will work with all terminal types
+		// (regardless of the xn,am settings).
+		// Only do this on a fast tty.
+		// Only do this if the cursor is on the current line
+		// (something has been written in it).
+		// Don't do this for the GUI.
+		// Don't do this for double-width characters.
+		// Don't do this for a window not at the right screen border.
+		if (p_tf
+#ifdef FEAT_GUI
+			 && !gui.in_use
+#endif
+			 && !(has_mbyte
+			     && ((*mb_off2cells)(LineOffset[screen_row],
+				     LineOffset[screen_row] + screen_Columns)
+									  == 2
+				 || (*mb_off2cells)(LineOffset[screen_row - 1]
+							+ (int)Columns - 2,
+				     LineOffset[screen_row] + screen_Columns)
+									== 2)))
+		{
+		    // First make sure we are at the end of the screen line,
+		    // then output the same character again to let the
+		    // terminal know about the wrap.  If the terminal doesn't
+		    // auto-wrap, we overwrite the character.
+		    if (screen_cur_col != wp->w_width)
+			screen_char(LineOffset[screen_row - 1]
+						      + (unsigned)Columns - 1,
+					  screen_row - 1, (int)(Columns - 1));
+
+		    // When there is a multi-byte character, just output a
+		    // space to keep it simple.
+		    if (has_mbyte && MB_BYTE2LEN(ScreenLines[LineOffset[
+					screen_row - 1] + (Columns - 1)]) > 1)
+			out_char(' ');
+		    else
+			out_char(ScreenLines[LineOffset[screen_row - 1]
+							    + (Columns - 1)]);
+		    // force a redraw of the first char on the next line
+		    ScreenAttrs[LineOffset[screen_row]] = (sattr_T)-1;
+		    screen_start();	// don't know where cursor is now
+		}
+	    }
+
+	    col = 0;
+	    off = (unsigned)(current_ScreenLine - ScreenLines);
+#ifdef FEAT_RIGHTLEFT
+	    if (wp->w_p_rl)
+	    {
+		col = wp->w_width - 1;	// col is not used if breaking!
+		off += col;
+	    }
+#endif
+
+	    // reset the drawing state for the start of a wrapped line
+	    draw_state = WL_START;
+	    saved_n_extra = n_extra;
+	    saved_p_extra = p_extra;
+	    saved_c_extra = c_extra;
+	    saved_c_final = c_final;
+#ifdef FEAT_SYN_HL
+	    if (!(cul_screenline
+# ifdef FEAT_DIFF
+			&& diff_hlf == (hlf_T)0)
+# endif
+		    )
+		saved_char_attr = char_attr;
+	    else
+#endif
+		saved_char_attr = 0;
+	    n_extra = 0;
+	    lcs_prec_todo = lcs_prec;
+#ifdef FEAT_LINEBREAK
+# ifdef FEAT_DIFF
+	    if (filler_todo <= 0)
+# endif
+		need_showbreak = TRUE;
+#endif
+#ifdef FEAT_DIFF
+	    --filler_todo;
+	    // When the filler lines are actually below the last line of the
+	    // file, don't draw the line itself, break here.
+	    if (filler_todo == 0 && wp->w_botfill)
+		break;
+#endif
+	}
+
+    }	// for every character in the line
+
+#ifdef FEAT_SPELL
+    // After an empty line check first word for capital.
+    if (*skipwhite(line) == NUL)
+    {
+	capcol_lnum = lnum + 1;
+	cap_col = 0;
+    }
+#endif
+#ifdef FEAT_TEXT_PROP
+    vim_free(text_props);
+    vim_free(text_prop_idxs);
+#endif
+
+    vim_free(p_extra_free);
+    return row;
+}
+