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drawline.c
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drawline.c
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/* vi:set ts=8 sts=4 sw=4 noet:
*
* VIM - Vi IMproved by Bram Moolenaar
*
* Do ":help uganda" in Vim to read copying and usage conditions.
* Do ":help credits" in Vim to see a list of people who contributed.
* See README.txt for an overview of the Vim source code.
*/
/*
* drawline.c: Functions for drawing window lines on the screen.
* This is the middle level, drawscreen.c 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
#if defined(FEAT_SIGNS) || defined(FEAT_QUICKFIX) \
|| defined(FEAT_SYN_HL) || defined(FEAT_DIFF)
// using an attribute for the whole line
# define LINE_ATTR
#endif
// structure with variables passed between win_line() and other functions
typedef struct {
int draw_state; // what to draw next
linenr_T lnum; // line number to be drawn
int startrow; // first row in the window to be drawn
int row; // row in the window, excl w_winrow
int screen_row; // row on the screen, incl w_winrow
long vcol; // virtual column, before wrapping
int col; // visual column on screen, after wrapping
#ifdef FEAT_CONCEAL
int boguscols; // nonexistent columns added to "col" to force
// wrapping
int vcol_off_co; // offset for concealed characters
#endif
int vcol_off_tp; // offset for virtual text
#ifdef FEAT_SYN_HL
int draw_color_col; // highlight colorcolumn
int *color_cols; // pointer to according columns array
#endif
int eol_hl_off; // 1 if highlighted char after EOL
unsigned off; // offset in ScreenLines/ScreenAttrs
int win_attr; // background for the whole window, except
// margins and "~" lines.
int wcr_attr; // attributes from 'wincolor'
#ifdef FEAT_SYN_HL
int cul_attr; // set when 'cursorline' active
#endif
#ifdef LINE_ATTR
int line_attr; // for the whole line, includes 'cursorline'
#endif
int screen_line_flags; // flags for screen_line()
int fromcol; // start of inverting
int tocol; // end of inverting
#ifdef FEAT_LINEBREAK
long vcol_sbr; // virtual column after showbreak
int need_showbreak; // overlong line, skipping first x chars
int dont_use_showbreak; // do not use 'showbreak'
#endif
#ifdef FEAT_PROP_POPUP
int text_prop_above_count;
#endif
// TRUE when 'cursorlineopt' has "screenline" and cursor is in this line
int cul_screenline;
int char_attr; // attributes for the next character
int n_extra; // number of extra bytes
char_u *p_extra; // string of extra chars, plus NUL, only used
// when c_extra and c_final are NUL
char_u *p_extra_free; // p_extra buffer that needs to be freed
int extra_attr; // attributes for p_extra, should be combined
// with win_attr if needed
int n_attr_skip; // chars to skip before using extra_attr
int c_extra; // extra chars, all the same
int c_final; // final char, mandatory if set
int extra_for_textprop; // n_extra set for textprop
int start_extra_for_textprop; // extra_for_textprop was just set
// saved "extra" items for when draw_state becomes WL_LINE (again)
int saved_n_extra;
char_u *saved_p_extra;
char_u *saved_p_extra_free;
int saved_extra_attr;
int saved_n_attr_skip;
int saved_extra_for_textprop;
int saved_c_extra;
int saved_c_final;
int saved_char_attr;
char_u extra[NUMBUFLEN + MB_MAXBYTES];
// "%ld " and 'fdc' must fit in here, as well
// any text sign
#ifdef FEAT_DIFF
hlf_T diff_hlf; // type of diff highlighting
#endif
int filler_lines; // nr of filler lines to be drawn
int filler_todo; // nr of filler lines still to do + 1
#ifdef FEAT_SIGNS
sign_attrs_T sattr;
#endif
#ifdef FEAT_LINEBREAK
// do consider wrapping in linebreak mode only after encountering
// a non whitespace char
int need_lbr;
#endif
} winlinevars_T;
// draw_state values for items that are drawn in sequence:
#define WL_START 0 // nothing done yet, must be zero
#define WL_CMDLINE (WL_START + 1) // cmdline window column
#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
#if defined(FEAT_SIGNS) || defined(FEAT_FOLDING)
/*
* Return TRUE if CursorLineSign highlight is to be used.
*/
static int
use_cursor_line_highlight(win_T *wp, linenr_T lnum)
{
return wp->w_p_cul
&& lnum == wp->w_cursor.lnum
&& (wp->w_p_culopt_flags & CULOPT_NBR);
}
#endif
#ifdef FEAT_FOLDING
/*
* Setup for drawing the 'foldcolumn', if there is one.
*/
static void
handle_foldcolumn(win_T *wp, winlinevars_T *wlv)
{
int fdc = compute_foldcolumn(wp, 0);
if (fdc <= 0)
return;
// Allocate a buffer, "wlv->extra[]" may already be in use.
vim_free(wlv->p_extra_free);
wlv->p_extra_free = alloc(MAX_MCO * fdc + 1);
if (wlv->p_extra_free == NULL)
return;
wlv->n_extra = (int)fill_foldcolumn(wlv->p_extra_free,
wp, FALSE, wlv->lnum);
wlv->p_extra_free[wlv->n_extra] = NUL;
wlv->p_extra = wlv->p_extra_free;
wlv->c_extra = NUL;
wlv->c_final = NUL;
if (use_cursor_line_highlight(wp, wlv->lnum))
wlv->char_attr = hl_combine_attr(wlv->wcr_attr, HL_ATTR(HLF_CLF));
else
wlv->char_attr = hl_combine_attr(wlv->wcr_attr, HL_ATTR(HLF_FC));
}
#endif
#ifdef FEAT_SIGNS
/*
* Get information needed to display the sign in line "wlv->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,
winlinevars_T *wlv)
{
int text_sign;
# ifdef FEAT_SIGN_ICONS
int icon_sign;
# endif
// Draw two cells with the sign value or blank.
wlv->c_extra = ' ';
wlv->c_final = NUL;
if (nrcol)
wlv->n_extra = number_width(wp) + 1;
else
{
if (use_cursor_line_highlight(wp, wlv->lnum))
wlv->char_attr = hl_combine_attr(wlv->wcr_attr, HL_ATTR(HLF_CLS));
else
wlv->char_attr = hl_combine_attr(wlv->wcr_attr, HL_ATTR(HLF_SC));
wlv->n_extra = 2;
}
if (wlv->row == wlv->startrow
#ifdef FEAT_DIFF
+ wlv->filler_lines && wlv->filler_todo <= 0
#endif
)
{
text_sign = (wlv->sattr.sat_text != NULL) ? wlv->sattr.sat_typenr : 0;
# ifdef FEAT_SIGN_ICONS
icon_sign = (wlv->sattr.sat_icon != NULL) ? wlv->sattr.sat_typenr : 0;
if (gui.in_use && icon_sign != 0)
{
// Use the image in this position.
if (nrcol)
{
wlv->c_extra = NUL;
sprintf((char *)wlv->extra, "%-*c ",
number_width(wp), SIGN_BYTE);
wlv->p_extra = wlv->extra;
wlv->n_extra = (int)STRLEN(wlv->p_extra);
}
else
wlv->c_extra = SIGN_BYTE;
# ifdef FEAT_NETBEANS_INTG
if (netbeans_active() && (buf_signcount(wp->w_buffer, wlv->lnum)
> 1))
{
if (nrcol)
{
wlv->c_extra = NUL;
sprintf((char *)wlv->extra, "%-*c ", number_width(wp),
MULTISIGN_BYTE);
wlv->p_extra = wlv->extra;
wlv->n_extra = (int)STRLEN(wlv->p_extra);
}
else
wlv->c_extra = MULTISIGN_BYTE;
}
# endif
wlv->c_final = NUL;
wlv->char_attr = icon_sign;
}
else
# endif
if (text_sign != 0)
{
wlv->p_extra = wlv->sattr.sat_text;
if (wlv->p_extra != NULL)
{
if (nrcol)
{
int width = number_width(wp) - 2;
int n;
for (n = 0; n < width; n++)
wlv->extra[n] = ' ';
vim_snprintf((char *)wlv->extra + n,
sizeof(wlv->extra) - n, "%s ", wlv->p_extra);
wlv->p_extra = wlv->extra;
}
wlv->c_extra = NUL;
wlv->c_final = NUL;
wlv->n_extra = (int)STRLEN(wlv->p_extra);
}
if (use_cursor_line_highlight(wp, wlv->lnum)
&& wlv->sattr.sat_culhl > 0)
wlv->char_attr = wlv->sattr.sat_culhl;
else
wlv->char_attr = wlv->sattr.sat_texthl;
}
}
}
#endif
/*
* Display the absolute or relative line number. After the first row fill with
* blanks when the 'n' flag isn't in 'cpo'.
*/
static void
handle_lnum_col(
win_T *wp,
winlinevars_T *wlv,
int sign_present UNUSED,
int num_attr UNUSED)
{
int has_cpo_n = vim_strchr(p_cpo, CPO_NUMCOL) != NULL;
int lnum_row = wlv->startrow + wlv->filler_lines
#ifdef FEAT_PROP_POPUP
+ wlv->text_prop_above_count
#endif
;
if ((wp->w_p_nu || wp->w_p_rnu)
&& (wlv->row <= lnum_row || !has_cpo_n)
// there is no line number in a wrapped line when "n" is in
// 'cpoptions', but 'breakindent' assumes it anyway.
&& !((has_cpo_n
#ifdef FEAT_LINEBREAK
&& !wp->w_p_bri
#endif
) && wp->w_skipcol > 0 && wlv->lnum == wp->w_topline))
{
#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, wlv);
else
#endif
{
// Draw the line number (empty space after wrapping).
// When there are text properties above the line put the line number
// below them.
if (wlv->row == lnum_row
&& (wp->w_skipcol == 0 || wlv->row > 0
|| (wp->w_p_nu && wp->w_p_rnu)))
{
long num;
char *fmt = "%*ld ";
if (wp->w_p_nu && !wp->w_p_rnu)
// 'number' + 'norelativenumber'
num = (long)wlv->lnum;
else
{
// 'relativenumber', don't use negative numbers
num = labs((long)get_cursor_rel_lnum(wp, wlv->lnum));
if (num == 0 && wp->w_p_nu && wp->w_p_rnu)
{
// 'number' + 'relativenumber'
num = wlv->lnum;
fmt = "%-*ld ";
}
}
sprintf((char *)wlv->extra, fmt, number_width(wp), num);
if (wp->w_skipcol > 0 && wlv->startrow == 0)
for (wlv->p_extra = wlv->extra; *wlv->p_extra == ' ';
++wlv->p_extra)
*wlv->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 = skipwhite(wlv->extra);
p2 = skiptowhite(p2) - 1;
for (p1 = skipwhite(wlv->extra); p1 < p2; ++p1, --p2)
{
t = *p1;
*p1 = *p2;
*p2 = t;
}
}
#endif
wlv->p_extra = wlv->extra;
wlv->c_extra = NUL;
wlv->c_final = NUL;
}
else
{
wlv->c_extra = ' ';
wlv->c_final = NUL;
}
wlv->n_extra = number_width(wp) + 1;
wlv->char_attr = hl_combine_attr(wlv->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' does not have "line" only
// highlight the line number itself.
// TODO: Can we use CursorLine instead of CursorLineNr
// when CursorLineNr isn't set?
if (wp->w_p_cul
&& wlv->lnum == wp->w_cursor.lnum
&& (wp->w_p_culopt_flags & CULOPT_NBR)
&& (wlv->row == wlv->startrow + wlv->filler_lines
|| (wlv->row > wlv->startrow + wlv->filler_lines
&& (wp->w_p_culopt_flags & CULOPT_LINE))))
wlv->char_attr = hl_combine_attr(wlv->wcr_attr, HL_ATTR(HLF_CLN));
#endif
if (wp->w_p_rnu && wlv->lnum < wp->w_cursor.lnum
&& HL_ATTR(HLF_LNA) != 0)
// Use LineNrAbove
wlv->char_attr = hl_combine_attr(wlv->wcr_attr, HL_ATTR(HLF_LNA));
if (wp->w_p_rnu && wlv->lnum > wp->w_cursor.lnum
&& HL_ATTR(HLF_LNB) != 0)
// Use LineNrBelow
wlv->char_attr = hl_combine_attr(wlv->wcr_attr, HL_ATTR(HLF_LNB));
}
#ifdef FEAT_SIGNS
if (num_attr)
wlv->char_attr = num_attr;
#endif
}
}
#ifdef FEAT_LINEBREAK
static void
handle_breakindent(win_T *wp, winlinevars_T *wlv)
{
if (wp->w_briopt_sbr && wlv->draw_state == WL_BRI - 1
&& *get_showbreak_value(wp) != NUL)
// draw indent after showbreak value
wlv->draw_state = WL_BRI;
else if (wp->w_briopt_sbr && wlv->draw_state == WL_SBR)
// After the showbreak, draw the breakindent
wlv->draw_state = WL_BRI - 1;
// draw 'breakindent': indent wrapped text accordingly
if (wlv->draw_state == WL_BRI - 1)
{
wlv->draw_state = WL_BRI;
// if wlv->need_showbreak is set, breakindent also applies
if (wp->w_p_bri && (wlv->row > wlv->startrow
# ifdef FEAT_DIFF
+ wlv->filler_lines
# endif
|| wlv->need_showbreak)
# ifdef FEAT_PROP_POPUP
&& !wlv->dont_use_showbreak
# endif
)
{
wlv->char_attr = 0;
# ifdef FEAT_DIFF
if (wlv->diff_hlf != (hlf_T)0)
wlv->char_attr = HL_ATTR(wlv->diff_hlf);
# endif
wlv->p_extra = NULL;
wlv->c_extra = ' ';
wlv->c_final = NUL;
wlv->n_extra = get_breakindent_win(wp,
ml_get_buf(wp->w_buffer, wlv->lnum, FALSE));
if (wlv->row == wlv->startrow)
{
wlv->n_extra -= win_col_off2(wp);
if (wlv->n_extra < 0)
wlv->n_extra = 0;
}
if (wp->w_skipcol > 0 && wlv->startrow == 0
&& wp->w_p_wrap && wp->w_briopt_sbr)
wlv->need_showbreak = FALSE;
// Correct end of highlighted area for 'breakindent',
// required when 'linebreak' is also set.
if (wlv->tocol == wlv->vcol)
wlv->tocol += wlv->n_extra;
}
}
}
#endif
#if defined(FEAT_LINEBREAK) || defined(FEAT_DIFF)
static void
handle_showbreak_and_filler(win_T *wp, winlinevars_T *wlv)
{
# ifdef FEAT_DIFF
if (wlv->filler_todo > 0)
{
// Draw "deleted" diff line(s).
if (char2cells(wp->w_fill_chars.diff) > 1)
{
wlv->c_extra = '-';
wlv->c_final = NUL;
}
else
{
wlv->c_extra = wp->w_fill_chars.diff;
wlv->c_final = NUL;
}
# ifdef FEAT_RIGHTLEFT
if (wp->w_p_rl)
wlv->n_extra = wlv->col + 1;
else
# endif
wlv->n_extra = wp->w_width - wlv->col;
wlv->char_attr = HL_ATTR(HLF_DED);
}
# endif
# ifdef FEAT_LINEBREAK
char_u *sbr = get_showbreak_value(wp);
if (*sbr != NUL && wlv->need_showbreak)
{
// Draw 'showbreak' at the start of each broken line.
wlv->p_extra = sbr;
wlv->c_extra = NUL;
wlv->c_final = NUL;
wlv->n_extra = (int)STRLEN(sbr);
if (wp->w_skipcol == 0 || wlv->startrow != 0 || !wp->w_p_wrap)
wlv->need_showbreak = FALSE;
wlv->vcol_sbr = wlv->vcol + MB_CHARLEN(sbr);
// Correct start of highlighted area for 'showbreak'.
if (wlv->fromcol >= wlv->vcol && wlv->fromcol < wlv->vcol_sbr)
wlv->fromcol = wlv->vcol_sbr;
// Correct end of highlighted area for 'showbreak',
// required when 'linebreak' is also set.
if (wlv->tocol == wlv->vcol)
wlv->tocol += wlv->n_extra;
// combine 'showbreak' with 'wincolor'
wlv->char_attr = hl_combine_attr(wlv->win_attr, HL_ATTR(HLF_AT));
# ifdef FEAT_SYN_HL
// combine 'showbreak' with 'cursorline'
if (wlv->cul_attr != 0)
wlv->char_attr = hl_combine_attr(wlv->char_attr, wlv->cul_attr);
# endif
}
# endif
}
#endif
#if defined(FEAT_PROP_POPUP) || defined(PROTO)
/*
* Return the cell size of virtual text after truncation.
*/
static int
textprop_size_after_trunc(
win_T *wp,
int flags, // TP_FLAG_ALIGN_*
int added,
int padding,
char_u *text,
int *n_used_ptr)
{
int space = (flags & (TP_FLAG_ALIGN_BELOW | TP_FLAG_ALIGN_ABOVE))
? wp->w_width - win_col_off(wp) : added;
int len = (int)STRLEN(text);
int strsize = 0;
int n_used;
// if the remaining size is to small and 'wrap' is set we wrap anyway and
// use the next line
if (space < PROP_TEXT_MIN_CELLS && wp->w_p_wrap)
space += wp->w_width;
if (flags & (TP_FLAG_ALIGN_BELOW | TP_FLAG_ALIGN_ABOVE))
space -= padding;
for (n_used = 0; n_used < len; n_used += (*mb_ptr2len)(text + n_used))
{
int clen = ptr2cells(text + n_used);
if (strsize + clen > space)
break;
strsize += clen;
}
*n_used_ptr = n_used;
return strsize;
}
/*
* Take care of padding, right-align and truncation of virtual text after a
* line.
* if "n_attr" is not NULL then "n_extra" and "p_extra" are adjusted for any
* padding, right-align and truncation. Otherwise only the size is computed.
* When "n_attr" is NULL returns the number of screen cells used.
* Otherwise returns TRUE when drawing continues on the next line.
*/
int
text_prop_position(
win_T *wp,
textprop_T *tp,
int vcol, // current text column
int scr_col, // current screen column
int *n_extra, // nr of bytes for virtual text
char_u **p_extra, // virtual text
int *n_attr, // attribute cells, NULL if not used
int *n_attr_skip, // cells to skip attr, NULL if not used
int do_skip) // skip_cells is not zero
{
int right = (tp->tp_flags & TP_FLAG_ALIGN_RIGHT);
int above = (tp->tp_flags & TP_FLAG_ALIGN_ABOVE);
int below = (tp->tp_flags & TP_FLAG_ALIGN_BELOW);
int wrap = tp->tp_col < MAXCOL || (tp->tp_flags & TP_FLAG_WRAP);
int padding = tp->tp_col == MAXCOL && tp->tp_len > 1
? tp->tp_len - 1 : 0;
int col_with_padding = scr_col + (below ? 0 : padding);
int room = wp->w_width - col_with_padding;
int before = room; // spaces before the text
int after = 0; // spaces after the text
int n_used = *n_extra;
char_u *l = NULL;
int strsize = vim_strsize(*p_extra);
int cells = wrap ? strsize : textprop_size_after_trunc(wp,
tp->tp_flags, before, padding, *p_extra, &n_used);
if (wrap || right || above || below || padding > 0 || n_used < *n_extra)
{
int col_off = win_col_off(wp) - win_col_off2(wp);
if (above)
{
before = 0;
after = wp->w_width - cells - win_col_off(wp) - padding;
if (after < 0)
{
// text "above" has too much padding to fit
padding += after;
after = 0;
}
}
else
{
// Right-align: fill with before
if (right)
before -= cells;
// Below-align: empty line add one character
if (below && vcol == 0 && col_with_padding == col_off
&& wp->w_width - col_off == before)
col_with_padding += 1;
if (before < 0
|| !(right || below)
|| (below ? (col_with_padding <= col_off || !wp->w_p_wrap)
: (n_used < *n_extra)))
{
if (right && (wrap
|| (room < PROP_TEXT_MIN_CELLS && wp->w_p_wrap)))
{
// right-align on next line instead of wrapping if possible
before = wp->w_width - col_off - strsize + room;
if (before < 0)
before = 0;
else
n_used = *n_extra;
}
else if (below && before > vcol && do_skip)
before -= vcol;
else
before = 0;
}
}
// With 'nowrap' add one to show the "extends" character if needed (it
// doesn't show if the text just fits).
if (!wp->w_p_wrap
&& n_used < *n_extra
&& wp->w_lcs_chars.ext != NUL
&& wp->w_p_list)
++n_used;
// add 1 for NUL, 2 for when '…' is used
if (n_attr != NULL)
l = alloc(n_used + before + after + (padding > 0 ? padding : 0) + 3);
if (n_attr == NULL || l != NULL)
{
int off = 0;
if (n_attr != NULL)
{
vim_memset(l, ' ', before);
off += before;
if (padding > 0)
{
vim_memset(l + off, ' ', padding);
off += padding;
}
vim_strncpy(l + off, *p_extra, n_used);
off += n_used;
}
else
{
off = before + after + padding + n_used;
cells += before + after + padding;
}
if (n_attr != NULL)
{
if (n_used < *n_extra && wp->w_p_wrap)
{
char_u *lp = l + off - 1;
if (has_mbyte)
{
char_u buf[MB_MAXBYTES + 1];
char_u *cp = buf;
// change the last character to '…', converted to the
// current 'encoding'
STRCPY(buf, "…");
if (!enc_utf8)
{
vimconv_T vc;
vc.vc_type = CONV_NONE;
convert_setup(&vc, (char_u *)"utf-8", p_enc);
if (vc.vc_type != CONV_NONE)
{
cp = string_convert(&vc, buf, NULL);
if (cp == NULL)
{
// when conversion fails use '>'
cp = buf;
STRCPY(buf, ">");
}
convert_setup(&vc, NULL, NULL);
}
}
lp -= (*mb_ptr2cells)(cp) - 1;
lp -= (*mb_head_off)(l, lp);
STRCPY(lp, cp);
n_used = lp - l + 3 - before - padding;
if (cp != buf)
vim_free(cp);
}
else
// change last character to '>'
*lp = '>';
}
else if (after > 0)
{
vim_memset(l + off, ' ', after);
l[off + after] = NUL;
}
*p_extra = l;
*n_extra = n_used + before + after + padding;
*n_attr = mb_charlen(*p_extra);
if (above)
*n_attr -= padding + after;
// n_attr_skip will not be decremented before draw_state is
// WL_LINE
*n_attr_skip = before + (padding > 0 ? padding : 0);
}
}
}
if (n_attr == NULL)
return cells;
return (below && col_with_padding > win_col_off(wp) && !wp->w_p_wrap);
}
#endif
/*
* Call screen_line() using values from "wlv".
* Also takes care of putting "<<<" on the first line for 'smoothscroll'
* when 'showbreak' is not set.
*/
static void
wlv_screen_line(win_T *wp, winlinevars_T *wlv, int negative_width)
{
if (wlv->row == 0 && wp->w_skipcol > 0
#if defined(FEAT_LINEBREAK)
// do not overwrite the 'showbreak' text with "<<<"
&& *get_showbreak_value(wp) == NUL
#endif
// do not overwrite the 'listchars' "precedes" text with "<<<"
&& !(wp->w_p_list && wp->w_lcs_chars.prec != 0))
{
int off = (int)(current_ScreenLine - ScreenLines);
int max_off = off + screen_Columns;
int skip = 0;
if (wp->w_p_nu && wp->w_p_rnu)
// Do not overwrite the line number, change "123 text" to
// "123<<<xt".
while (skip < wp->w_width && VIM_ISDIGIT(ScreenLines[off]))
{
++off;
++skip;
}
for (int i = 0; i < 3 && i + skip < wp->w_width; ++i)
{
if ((*mb_off2cells)(off, max_off) > 1)
// When the first half of a double-width character is
// overwritten, change the second half to a space.
ScreenLines[off + 1] = ' ';
ScreenLines[off] = '<';
if (enc_utf8)
ScreenLinesUC[off] = 0;
ScreenAttrs[off] = HL_ATTR(HLF_AT);
++off;
}
}
screen_line(wp, wlv->screen_row, wp->w_wincol, wlv->col,
negative_width ? -wp->w_width : wp->w_width,
wlv->screen_line_flags);
}
/*
* Called when finished with the line: draw the screen line and handle any
* highlighting until the right of the window.
*/
static void
draw_screen_line(win_T *wp, winlinevars_T *wlv)
{
#ifdef FEAT_SYN_HL
long v;
// Highlight 'cursorcolumn' & 'colorcolumn' past end of the line.
if (wp->w_p_wrap)
v = wlv->startrow == 0 ? wp->w_skipcol : 0;
else
v = wp->w_leftcol;
// check if line ends before left margin
if (wlv->vcol < v + wlv->col - win_col_off(wp))
wlv->vcol = v + wlv->col - win_col_off(wp);
# ifdef FEAT_CONCEAL
// Get rid of the boguscols now, we want to draw until the right
// edge for 'cursorcolumn'.
wlv->col -= wlv->boguscols;
wlv->boguscols = 0;
# define VCOL_HLC (wlv->vcol - wlv->vcol_off_co - wlv->vcol_off_tp)
# else
# define VCOL_HLC (wlv->vcol - wlv->vcol_off_tp)
# endif
if (wlv->draw_color_col)
wlv->draw_color_col = advance_color_col(VCOL_HLC, &wlv->color_cols);
if (((wp->w_p_cuc
&& (int)wp->w_virtcol >= VCOL_HLC - wlv->eol_hl_off
&& (int)wp->w_virtcol <
(long)wp->w_width * (wlv->row - wlv->startrow + 1) + v
&& wlv->lnum != wp->w_cursor.lnum)
|| wlv->draw_color_col
# ifdef LINE_ATTR
|| wlv->line_attr != 0
# endif
|| wlv->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 (wlv->draw_color_col)
// determine rightmost colorcolumn to possibly draw
for (i = 0; wlv->color_cols[i] >= 0; ++i)
if (rightmost_vcol < wlv->color_cols[i])
rightmost_vcol = wlv->color_cols[i];
while (wlv->col < wp->w_width)
{
ScreenLines[wlv->off] = ' ';
if (enc_utf8)
ScreenLinesUC[wlv->off] = 0;
ScreenCols[wlv->off] = MAXCOL;
++wlv->col;
if (wlv->draw_color_col)
wlv->draw_color_col = advance_color_col(
VCOL_HLC, &wlv->color_cols);
int attr = wlv->win_attr;
if (wp->w_p_cuc && VCOL_HLC == (long)wp->w_virtcol)
attr = HL_ATTR(HLF_CUC);
else if (wlv->draw_color_col && VCOL_HLC == *wlv->color_cols)
attr = HL_ATTR(HLF_MC);
# ifdef LINE_ATTR
else if (wlv->line_attr != 0)
attr = wlv->line_attr;
# endif
ScreenAttrs[wlv->off++] = attr;
if (VCOL_HLC >= rightmost_vcol
# ifdef LINE_ATTR
&& wlv->line_attr == 0
# endif
&& wlv->win_attr == 0)
break;
++wlv->vcol;
}
}
#endif
wlv_screen_line(wp, wlv, FALSE);
++wlv->row;
++wlv->screen_row;
}
#undef VCOL_HLC
/*
* Start a screen line at column zero.
* When "save_extra" is TRUE save and reset n_extra, p_extra, etc.
*/
static void
win_line_start(win_T *wp UNUSED, winlinevars_T *wlv, int save_extra)
{
wlv->col = 0;
wlv->off = (unsigned)(current_ScreenLine - ScreenLines);
#ifdef FEAT_LINEBREAK
wlv->need_lbr = FALSE;
#endif
#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.
wlv->col = wp->w_width - 1;
wlv->off += wlv->col;
wlv->screen_line_flags |= SLF_RIGHTLEFT;
}
#endif
if (save_extra)
{
// reset the drawing state for the start of a wrapped line
wlv->draw_state = WL_START;
wlv->saved_n_extra = wlv->n_extra;
wlv->saved_p_extra = wlv->p_extra;
vim_free(wlv->saved_p_extra_free);
wlv->saved_p_extra_free = wlv->p_extra_free;
wlv->p_extra_free = NULL;