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neovim/src/nvim/drawline.c
bfredl 93b30582db fix(redraw): make redrawdebug=nodelta handle all the cases 
Before only win_line lines were considered. this applies nodelta
to all screen elements. Causes some failures, which might indeed
indicate excessive redraws.
2022-09-22 10:38:10 +02:00

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// This is an open source non-commercial project. Dear PVS-Studio, please check
// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
// drawline.c: Functions for drawing window lines on the screen.
// This is the middle level, drawscreen.c is the top and grid.c/screen.c the lower level.
#include <assert.h>
#include <inttypes.h>
#include <stdbool.h>
#include <string.h>
#include "nvim/arabic.h"
#include "nvim/buffer.h"
#include "nvim/buffer_defs.h"
#include "nvim/charset.h"
#include "nvim/cursor.h"
#include "nvim/cursor_shape.h"
#include "nvim/decoration.h"
#include "nvim/diff.h"
#include "nvim/drawline.h"
#include "nvim/fold.h"
#include "nvim/grid.h"
#include "nvim/highlight.h"
#include "nvim/highlight_group.h"
#include "nvim/indent.h"
#include "nvim/match.h"
#include "nvim/move.h"
#include "nvim/option.h"
#include "nvim/plines.h"
#include "nvim/quickfix.h"
#include "nvim/search.h"
#include "nvim/sign.h"
#include "nvim/spell.h"
#include "nvim/state.h"
#include "nvim/syntax.h"
#include "nvim/undo.h"
#include "nvim/window.h"
#define MB_FILLER_CHAR '<' // character used when a double-width character
// doesn't fit.
/// for line_putchar. Contains the state that needs to be remembered from
/// putting one character to the next.
typedef struct {
const char *p;
int prev_c; ///< previous Arabic character
int prev_c1; ///< first composing char for prev_c
} LineState;
#define LINE_STATE(p) { p, 0, 0 }
#ifdef INCLUDE_GENERATED_DECLARATIONS
# include "drawline.c.generated.h"
#endif
/// Advance **color_cols
///
/// @return true when there are columns to draw.
static bool advance_color_col(int vcol, int **color_cols)
{
while (**color_cols >= 0 && vcol > **color_cols) {
(*color_cols)++;
}
return **color_cols >= 0;
}
/// 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;
}
/// Put a single char from an UTF-8 buffer into a line buffer.
///
/// Handles composing chars and arabic shaping state.
static int line_putchar(buf_T *buf, LineState *s, schar_T *dest, int maxcells, bool rl, int vcol)
{
const char_u *p = (char_u *)s->p;
int cells = utf_ptr2cells((char *)p);
int c_len = utfc_ptr2len((char *)p);
int u8c, u8cc[MAX_MCO];
if (cells > maxcells) {
return -1;
}
u8c = utfc_ptr2char((char *)p, u8cc);
if (*p == TAB) {
cells = MIN(tabstop_padding(vcol, buf->b_p_ts, buf->b_p_vts_array), maxcells);
for (int c = 0; c < cells; c++) {
schar_from_ascii(dest[c], ' ');
}
goto done;
} else if (*p < 0x80 && u8cc[0] == 0) {
schar_from_ascii(dest[0], (char)(*p));
s->prev_c = u8c;
} else {
if (p_arshape && !p_tbidi && ARABIC_CHAR(u8c)) {
// Do Arabic shaping.
int pc, pc1, nc;
int pcc[MAX_MCO];
int firstbyte = *p;
// The idea of what is the previous and next
// character depends on 'rightleft'.
if (rl) {
pc = s->prev_c;
pc1 = s->prev_c1;
nc = utf_ptr2char((char *)p + c_len);
s->prev_c1 = u8cc[0];
} else {
pc = utfc_ptr2char((char *)p + c_len, pcc);
nc = s->prev_c;
pc1 = pcc[0];
}
s->prev_c = u8c;
u8c = arabic_shape(u8c, &firstbyte, &u8cc[0], pc, pc1, nc);
} else {
s->prev_c = u8c;
}
schar_from_cc(dest[0], u8c, u8cc);
}
if (cells > 1) {
dest[1][0] = 0;
}
done:
s->p += c_len;
return cells;
}
static inline void provider_err_virt_text(linenr_T lnum, char *err)
{
Decoration err_decor = DECORATION_INIT;
int hl_err = syn_check_group(S_LEN("ErrorMsg"));
kv_push(err_decor.virt_text,
((VirtTextChunk){ .text = err,
.hl_id = hl_err }));
err_decor.virt_text_width = (int)mb_string2cells(err);
decor_add_ephemeral(lnum - 1, 0, lnum - 1, 0, &err_decor, 0, 0);
}
static void draw_virt_text(win_T *wp, buf_T *buf, int col_off, int *end_col, int max_col,
int win_row)
{
DecorState *state = &decor_state;
int right_pos = max_col;
bool do_eol = state->eol_col > -1;
for (size_t i = 0; i < kv_size(state->active); i++) {
DecorRange *item = &kv_A(state->active, i);
if (!(item->start_row == state->row
&& (kv_size(item->decor.virt_text) || item->decor.ui_watched))) {
continue;
}
if (item->win_col == -1) {
if (item->decor.virt_text_pos == kVTRightAlign) {
right_pos -= item->decor.virt_text_width;
item->win_col = right_pos;
} else if (item->decor.virt_text_pos == kVTEndOfLine && do_eol) {
item->win_col = state->eol_col;
} else if (item->decor.virt_text_pos == kVTWinCol) {
item->win_col = MAX(item->decor.col + col_off, 0);
}
}
if (item->win_col < 0) {
continue;
}
int col;
if (item->decor.ui_watched) {
// send mark position to UI
col = item->win_col;
WinExtmark m = { (NS)item->ns_id, item->mark_id, win_row, col };
kv_push(win_extmark_arr, m);
}
if (kv_size(item->decor.virt_text)) {
col = draw_virt_text_item(buf, item->win_col, item->decor.virt_text,
item->decor.hl_mode, max_col, item->win_col - col_off);
}
item->win_col = -2; // deactivate
if (item->decor.virt_text_pos == kVTEndOfLine && do_eol) {
state->eol_col = col + 1;
}
*end_col = MAX(*end_col, col);
}
}
static int draw_virt_text_item(buf_T *buf, int col, VirtText vt, HlMode hl_mode, int max_col,
int vcol)
{
LineState s = LINE_STATE("");
int virt_attr = 0;
size_t virt_pos = 0;
while (col < max_col) {
if (!*s.p) {
if (virt_pos >= kv_size(vt)) {
break;
}
virt_attr = 0;
do {
s.p = kv_A(vt, virt_pos).text;
int hl_id = kv_A(vt, virt_pos).hl_id;
virt_attr = hl_combine_attr(virt_attr,
hl_id > 0 ? syn_id2attr(hl_id) : 0);
virt_pos++;
} while (!s.p && virt_pos < kv_size(vt));
if (!s.p) {
break;
}
}
if (!*s.p) {
continue;
}
int attr;
bool through = false;
if (hl_mode == kHlModeCombine) {
attr = hl_combine_attr(linebuf_attr[col], virt_attr);
} else if (hl_mode == kHlModeBlend) {
through = (*s.p == ' ');
attr = hl_blend_attrs(linebuf_attr[col], virt_attr, &through);
} else {
attr = virt_attr;
}
schar_T dummy[2];
int cells = line_putchar(buf, &s, through ? dummy : &linebuf_char[col],
max_col - col, false, vcol);
// if we failed to emit a char, we still need to advance
cells = MAX(cells, 1);
for (int c = 0; c < cells; c++) {
linebuf_attr[col++] = attr;
}
vcol += cells;
}
return col;
}
/// Return true if CursorLineSign highlight is to be used.
static bool use_cursor_line_sign(win_T *wp, linenr_T lnum)
{
return wp->w_p_cul
&& lnum == wp->w_cursor.lnum
&& (wp->w_p_culopt_flags & CULOPT_NBR);
}
// 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.
//
// @param count max number of signs
// @param[out] n_extrap number of characters from pp_extra to display
// @param sign_idxp Index of the displayed sign
static void get_sign_display_info(bool nrcol, win_T *wp, linenr_T lnum, SignTextAttrs sattrs[],
int row, int startrow, int filler_lines, int filler_todo,
int *c_extrap, int *c_finalp, char_u *extra, size_t extra_size,
char_u **pp_extra, int *n_extrap, int *char_attrp, int sign_idx,
int cul_attr)
{
// Draw cells with the sign value or blank.
*c_extrap = ' ';
*c_finalp = NUL;
if (nrcol) {
*n_extrap = number_width(wp) + 1;
} else {
if (use_cursor_line_sign(wp, lnum)) {
*char_attrp = win_hl_attr(wp, HLF_CLS);
} else {
*char_attrp = win_hl_attr(wp, HLF_SC);
}
*n_extrap = win_signcol_width(wp);
}
if (row == startrow + filler_lines && filler_todo <= 0) {
SignTextAttrs *sattr = sign_get_attr(sign_idx, sattrs, wp->w_scwidth);
if (sattr != NULL) {
*pp_extra = (char_u *)sattr->text;
if (*pp_extra != NULL) {
*c_extrap = NUL;
*c_finalp = NUL;
if (nrcol) {
int n, width = number_width(wp) - 2;
for (n = 0; n < width; n++) {
extra[n] = ' ';
}
extra[n] = NUL;
STRCAT(extra, *pp_extra);
STRCAT(extra, " ");
*pp_extra = extra;
*n_extrap = (int)STRLEN(*pp_extra);
} else {
size_t symbol_blen = STRLEN(*pp_extra);
// TODO(oni-link): Is sign text already extended to
// full cell width?
assert((size_t)win_signcol_width(wp) >= mb_string2cells((char *)(*pp_extra)));
// symbol(s) bytes + (filling spaces) (one byte each)
*n_extrap = (int)symbol_blen + win_signcol_width(wp) -
(int)mb_string2cells((char *)(*pp_extra));
assert(extra_size > symbol_blen);
memset(extra, ' ', extra_size);
memcpy(extra, *pp_extra, symbol_blen);
*pp_extra = extra;
(*pp_extra)[*n_extrap] = NUL;
}
}
if (use_cursor_line_sign(wp, lnum) && cul_attr > 0) {
*char_attrp = cul_attr;
} else {
*char_attrp = sattr->hl_attr_id;
}
}
}
}
static int get_sign_attrs(buf_T *buf, linenr_T lnum, SignTextAttrs *sattrs, int *line_attr,
int *num_attr, int *cul_attr)
{
HlPriAttr line_attrs = { *line_attr, 0 };
HlPriAttr num_attrs = { *num_attr, 0 };
HlPriAttr cul_attrs = { *cul_attr, 0 };
// TODO(bfredl, vigoux): line_attr should not take priority over decoration!
int num_signs = buf_get_signattrs(buf, lnum, sattrs, &num_attrs, &line_attrs, &cul_attrs);
decor_redraw_signs(buf, lnum - 1, &num_signs, sattrs, &num_attrs, &line_attrs, &cul_attrs);
*line_attr = line_attrs.attr_id;
*num_attr = num_attrs.attr_id;
*cul_attr = cul_attrs.attr_id;
return num_signs;
}
/// Return true if CursorLineNr highlight is to be used for the number column.
///
/// - 'cursorline' must be set
/// - lnum must be the cursor line
/// - 'cursorlineopt' has "number"
/// - don't highlight filler lines (when in diff mode)
/// - When line is wrapped and 'cursorlineopt' does not have "line", only highlight the line number
/// itself on the first screenline of the wrapped line, otherwise highlight the number column of
/// all screenlines of the wrapped line.
static bool use_cursor_line_nr(win_T *wp, linenr_T lnum, int row, int startrow, int filler_lines)
{
return wp->w_p_cul
&& lnum == wp->w_cursor.lnum
&& (wp->w_p_culopt_flags & CULOPT_NBR)
&& (row == startrow + filler_lines
|| (row > startrow + filler_lines
&& (wp->w_p_culopt_flags & CULOPT_LINE)));
}
static inline void get_line_number_str(win_T *wp, linenr_T lnum, char_u *buf, size_t buf_len)
{
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 ";
}
}
snprintf((char *)buf, buf_len, fmt, number_width(wp), num);
}
static int get_line_number_attr(win_T *wp, linenr_T lnum, int row, int startrow, int filler_lines)
{
if (wp->w_p_rnu) {
if (lnum < wp->w_cursor.lnum) {
// Use LineNrAbove
return win_hl_attr(wp, HLF_LNA);
}
if (lnum > wp->w_cursor.lnum) {
// Use LineNrBelow
return win_hl_attr(wp, HLF_LNB);
}
}
if (use_cursor_line_nr(wp, lnum, row, startrow, filler_lines)) {
// TODO(vim): Can we use CursorLine instead of CursorLineNr
// when CursorLineNr isn't set?
return win_hl_attr(wp, HLF_CLN);
}
return win_hl_attr(wp, HLF_N);
}
static void apply_cursorline_highlight(win_T *wp, linenr_T lnum, int *line_attr, int *cul_attr,
int *line_attr_lowprio)
{
*cul_attr = win_hl_attr(wp, HLF_CUL);
HlAttrs ae = syn_attr2entry(*cul_attr);
// We make a compromise here (#7383):
// * low-priority CursorLine if fg is not set
// * high-priority ("same as Vim" priority) CursorLine if fg is set
if (ae.rgb_fg_color == -1 && ae.cterm_fg_color == 0) {
*line_attr_lowprio = *cul_attr;
} else {
if (!(State & MODE_INSERT) && bt_quickfix(wp->w_buffer)
&& qf_current_entry(wp) == lnum) {
*line_attr = hl_combine_attr(*cul_attr, *line_attr);
} else {
*line_attr = *cul_attr;
}
}
}
static bool check_mb_utf8(int *c, int *u8cc)
{
if (utf_char2len(*c) > 1) {
*u8cc = 0;
*c = 0xc0;
return true;
}
return false;
}
/// Display line "lnum" of window 'wp' on the screen.
/// wp->w_virtcol needs to be valid.
///
/// @param lnum line to display
/// @param startrow first row relative to window grid
/// @param endrow last grid row to be redrawn
/// @param nochange not updating for changed text
/// @param number_only only update the number column
/// @param foldinfo fold info for this line
/// @param[in, out] providers decoration providers active this line
/// items will be disables if they cause errors
/// or explicitly return `false`.
///
/// @return the number of last row the line occupies.
int win_line(win_T *wp, linenr_T lnum, int startrow, int endrow, bool nochange, bool number_only,
foldinfo_T foldinfo, DecorProviders *providers, char **provider_err)
{
int c = 0; // init for GCC
long vcol = 0; // virtual column (for tabs)
long vcol_sbr = -1; // virtual column after showbreak
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
ScreenGrid *grid = &wp->w_grid; // grid specific to the window
char_u extra[57]; // sign, line number 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
// curwin->w_p_lcs_chars.eol at
// end-of-line
int lcs_eol_one = wp->w_p_lcs_chars.eol; // 'eol' until it's been used
int lcs_prec_todo = wp->w_p_lcs_chars.prec; // 'prec' until it's been used
bool has_fold = foldinfo.fi_level != 0 && foldinfo.fi_lines > 0;
// 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
bool noinvcur = false; // don't invert the cursor
bool lnum_in_visual_area = false;
pos_T pos;
long v;
int char_attr = 0; // attributes for next character
bool attr_pri = false; // char_attr has priority
bool area_highlighting = false; // Visual or incsearch highlighting in this line
int attr = 0; // attributes for area highlighting
int area_attr = 0; // attributes desired by highlighting
int search_attr = 0; // attributes desired by 'hlsearch'
int vcol_save_attr = 0; // saved attr for 'cursorcolumn'
int syntax_attr = 0; // attributes desired by syntax
bool has_syntax = false; // this buffer has syntax highl.
int save_did_emsg;
int eol_hl_off = 0; // 1 if highlighted char after EOL
bool draw_color_col = false; // highlight colorcolumn
int *color_cols = NULL; // pointer to according columns array
bool 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"
int cur_checked_col = 0; // checked column for current line
int extra_check = 0; // has syntax or linebreak
int multi_attr = 0; // attributes desired by multibyte
int mb_l = 1; // multi-byte byte length
int mb_c = 0; // decoded multi-byte character
bool mb_utf8 = false; // screen char is UTF-8 char
int u8cc[MAX_MCO]; // composing UTF-8 chars
int filler_lines; // nr of filler lines to be drawn
int filler_todo; // nr of filler lines still to do + 1
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
colnr_T trailcol = MAXCOL; // start of trailing spaces
colnr_T leadcol = 0; // start of leading spaces
bool in_multispace = false; // in multiple consecutive spaces
int multispace_pos = 0; // position in lcs-multispace string
bool need_showbreak = false; // overlong line, skip first x chars
int line_attr = 0; // attribute for the whole line
int line_attr_save;
int line_attr_lowprio = 0; // low-priority attribute for the line
int line_attr_lowprio_save;
int prev_c = 0; // previous Arabic character
int prev_c1 = 0; // first composing char for prev_c
bool search_attr_from_match = false; // if search_attr is from :match
bool has_decor = false; // this buffer has decoration
int win_col_offset = 0; // offset for window columns
char_u buf_fold[FOLD_TEXT_LEN]; // Hold value returned by get_foldtext
bool area_active = false;
int cul_attr = 0; // set when 'cursorline' active
// 'cursorlineopt' has "screenline" and cursor is in this line
bool 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;
// draw_state: items that are drawn in sequence:
#define WL_START 0 // nothing done yet
#define WL_CMDLINE (WL_START + 1) // cmdline window column
#define WL_FOLD (WL_CMDLINE + 1) // 'foldcolumn'
#define WL_SIGN (WL_FOLD + 1) // column for signs
#define WL_NR (WL_SIGN + 1) // line number
#define WL_BRI (WL_NR + 1) // 'breakindent'
#define WL_SBR (WL_BRI + 1) // 'showbreak' or 'diff'
#define WL_LINE (WL_SBR + 1) // text in the line
int draw_state = WL_START; // what to draw next
int syntax_flags = 0;
int syntax_seqnr = 0;
int prev_syntax_id = 0;
int conceal_attr = win_hl_attr(wp, HLF_CONCEAL);
bool 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 match_conc = 0; ///< cchar for match functions
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; \
}
if (startrow > endrow) { // past the end already!
return startrow;
}
row = startrow;
buf_T *buf = wp->w_buffer;
bool end_fill = (lnum == buf->b_ml.ml_line_count + 1);
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.
extra_check = wp->w_p_lbr;
if (syntax_present(wp) && !wp->w_s->b_syn_error && !wp->w_s->b_syn_slow
&& !has_fold && !end_fill) {
// 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;
if (!wp->w_s->b_syn_slow) {
has_syntax = true;
extra_check = true;
}
}
}
has_decor = decor_redraw_line(buf, lnum - 1, &decor_state);
decor_providers_invoke_line(wp, providers, lnum - 1, &has_decor, provider_err);
if (*provider_err) {
provider_err_virt_text(lnum, *provider_err);
has_decor = true;
*provider_err = NULL;
}
if (has_decor) {
extra_check = true;
}
// Check for columns to display for 'colorcolumn'.
color_cols = wp->w_buffer->terminal ? NULL : wp->w_p_cc_cols;
if (color_cols != NULL) {
draw_color_col = advance_color_col((int)VCOL_HLC, &color_cols);
}
if (wp->w_p_spell
&& !has_fold
&& !end_fill
&& *wp->w_s->b_p_spl != NUL
&& !GA_EMPTY(&wp->w_s->b_langp)
&& *(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 = (char_u *)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;
}
// handle Visual active in this window
if (VIsual_active && wp->w_buffer == curwin->w_buffer) {
pos_T *top, *bot;
if (ltoreq(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 char under the cursor should be inverted (highlighted).
if (!highlight_match && lnum == curwin->w_cursor.lnum && wp == curwin
&& cursor_is_block_during_visual(*p_sel == 'e')) {
noinvcur = true;
}
// if inverting in this line set area_highlighting
if (fromcol >= 0) {
area_highlighting = true;
attr = win_hl_attr(wp, HLF_V);
}
// handle 'incsearch' and ":s///c" highlighting
} else if (highlight_match
&& wp == curwin
&& !has_fold
&& 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);
}
// do at least one character; happens when past end of line
if (fromcol == tocol && search_match_endcol) {
tocol = fromcol + 1;
}
area_highlighting = true;
attr = win_hl_attr(wp, HLF_I);
}
}
int bg_attr = win_bg_attr(wp);
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;
}
VirtLines virt_lines = KV_INITIAL_VALUE;
int n_virt_lines = decor_virt_lines(wp, lnum, &virt_lines);
filler_lines += n_virt_lines;
if (lnum == wp->w_topline) {
filler_lines = wp->w_topfill;
n_virt_lines = MIN(n_virt_lines, filler_lines);
}
filler_todo = filler_lines;
// Cursor line highlighting for 'cursorline' in the current window.
if (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.
if (wp->w_p_cul && !(wp == curwin && VIsual_active)
&& wp->w_p_culopt_flags != CULOPT_NBR) {
cul_screenline = (wp->w_p_wrap
&& (wp->w_p_culopt_flags & CULOPT_SCRLINE));
if (!cul_screenline) {
apply_cursorline_highlight(wp, lnum, &line_attr, &cul_attr, &line_attr_lowprio);
} else {
margin_columns_win(wp, &left_curline_col, &right_curline_col);
}
area_highlighting = true;
}
}
SignTextAttrs sattrs[SIGN_SHOW_MAX]; // sign attributes for the sign column
int sign_num_attr = 0; // sign attribute for the number column
int sign_cul_attr = 0; // sign attribute for cursorline
CLEAR_FIELD(sattrs);
int num_signs = get_sign_attrs(buf, lnum, sattrs, &line_attr, &sign_num_attr, &sign_cul_attr);
// Highlight the current line in the quickfix window.
if (bt_quickfix(wp->w_buffer) && qf_current_entry(wp) == lnum) {
line_attr = win_hl_attr(wp, HLF_QFL);
}
if (line_attr_lowprio || line_attr) {
area_highlighting = true;
}
if (cul_screenline) {
line_attr_save = line_attr;
line_attr_lowprio_save = line_attr_lowprio;
}
line = end_fill ? (char_u *)"" : (char_u *)ml_get_buf(wp->w_buffer, lnum, false);
ptr = line;
if (has_spell && !number_only) {
// For checking first word with a capital skip white space.
if (cap_col == 0) {
cap_col = (int)getwhitecols((char *)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;
memmove(nextline, line, (size_t)v);
STRMOVE(nextline + v, nextline + SPWORDLEN);
nextline_idx = (int)v + 1;
} else {
// Long line, use only the last SPWORDLEN bytes.
nextlinecol = (int)v - SPWORDLEN;
memmove(nextline, line + nextlinecol, SPWORDLEN); // -V1086
nextline_idx = SPWORDLEN + 1;
}
}
}
if (wp->w_p_list && !has_fold && !end_fill) {
if (wp->w_p_lcs_chars.space
|| wp->w_p_lcs_chars.multispace != NULL
|| wp->w_p_lcs_chars.leadmultispace != NULL
|| wp->w_p_lcs_chars.trail
|| wp->w_p_lcs_chars.lead
|| wp->w_p_lcs_chars.nbsp) {
extra_check = true;
}
// find start of trailing whitespace
if (wp->w_p_lcs_chars.trail) {
trailcol = (colnr_T)STRLEN(ptr);
while (trailcol > (colnr_T)0 && ascii_iswhite(ptr[trailcol - 1])) {
trailcol--;
}
trailcol += (colnr_T)(ptr - line);
}
// find end of leading whitespace
if (wp->w_p_lcs_chars.lead || wp->w_p_lcs_chars.leadmultispace != NULL) {
leadcol = 0;
while (ascii_iswhite(ptr[leadcol])) {
leadcol++;
}
if (ptr[leadcol] == NUL) {
// in a line full of spaces all of them are treated as trailing
leadcol = (colnr_T)0;
} else {
// keep track of the first column not filled with spaces
leadcol += (colnr_T)(ptr - line) + 1;
}
}
}
// '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;
chartabsize_T cts;
int charsize;
init_chartabsize_arg(&cts, wp, lnum, (colnr_T)vcol, (char *)line, (char *)ptr);
while (cts.cts_vcol < v && *cts.cts_ptr != NUL) {
charsize = win_lbr_chartabsize(&cts, NULL);
cts.cts_vcol += charsize;
prev_ptr = (char_u *)cts.cts_ptr;
MB_PTR_ADV(cts.cts_ptr);
}
vcol = cts.cts_vcol;
ptr = (char_u *)cts.cts_ptr;
clear_chartabsize_arg(&cts);
// 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 && (wp->w_p_cuc
|| draw_color_col
|| 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 -= charsize;
ptr = prev_ptr;
// If the character fits on the screen, don't need to skip it.
// Except for a TAB.
if (utf_ptr2cells((char *)ptr) >= charsize || *ptr == TAB) {
n_skip = (int)(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 = (int)vcol;
}
// When w_skipcol is non-zero, first line needs 'showbreak'
if (wp->w_p_wrap) {
need_showbreak = true;
}
// 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) {
size_t 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 = (char_u *)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
assert(len <= INT_MAX);
word_end = wp->w_cursor.col + (int)len + 1;
// Turn index into actual attributes.
if (spell_hlf != HLF_COUNT) {
spell_attr = highlight_attr[spell_hlf];
}
}
wp->w_cursor = pos;
// Need to restart syntax highlighting for this line.
if (has_syntax) {
syntax_start(wp, lnum);
}
}
}
// 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;
}
}
if (!number_only && !has_fold && !end_fill) {
v = ptr - line;
area_highlighting |= prepare_search_hl_line(wp, lnum, (colnr_T)v,
&line, &screen_search_hl, &search_attr,
&search_attr_from_match);
ptr = line + v; // "line" may have been updated
}
int off = 0; // Offset relative start of line
int col = 0; // Visual column on screen.
if (wp->w_p_rl) {
// Rightleft window: process the text in the normal direction, but put
// it in linebuf_char[off] from right to left. Start at the
// rightmost column of the window.
col = grid->cols - 1;
off += col;
}
// won't highlight after TERM_ATTRS_MAX columns
int term_attrs[TERM_ATTRS_MAX] = { 0 };
if (wp->w_buffer->terminal) {
terminal_get_line_attributes(wp->w_buffer->terminal, wp, lnum, term_attrs);
extra_check = true;
}
int sign_idx = 0;
// Repeat for the whole displayed line.
for (;;) {
int has_match_conc = 0; ///< match wants to conceal
int decor_conceal = 0;
bool did_decrement_ptr = false;
// Skip this quickly when working on the text.
if (draw_state != WL_LINE) {
if (cul_screenline) {
cul_attr = 0;
line_attr = line_attr_save;
line_attr_lowprio = line_attr_lowprio_save;
}
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 = win_hl_attr(wp, HLF_AT);
}
}
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.
xfree(p_extra_free);
p_extra_free = xmalloc(MAX_MCO * (size_t)fdc + 1);
n_extra = (int)fill_foldcolumn(p_extra_free, wp, foldinfo, lnum);
p_extra_free[n_extra] = NUL;
p_extra = p_extra_free;
c_extra = NUL;
c_final = NUL;
if (use_cursor_line_sign(wp, lnum)) {
char_attr = win_hl_attr(wp, HLF_CLF);
} else {
char_attr = win_hl_attr(wp, HLF_FC);
}
}
}
// sign column, this is hit until sign_idx reaches count
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
if (wp->w_scwidth > 0) {
get_sign_display_info(false, wp, lnum, sattrs, row,
startrow, filler_lines, filler_todo,
&c_extra, &c_final, extra, sizeof(extra),
&p_extra, &n_extra, &char_attr, sign_idx,
sign_cul_attr);
sign_idx++;
if (sign_idx < wp->w_scwidth) {
draw_state = WL_SIGN - 1;
} else {
sign_idx = 0;
}
}
}
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 + filler_lines
|| vim_strchr(p_cpo, CPO_NUMCOL) == NULL)) {
// 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' && num_signs > 0) {
get_sign_display_info(true, wp, lnum, sattrs, row,
startrow, filler_lines, filler_todo,
&c_extra, &c_final, extra, sizeof(extra),
&p_extra, &n_extra, &char_attr, sign_idx,
sign_cul_attr);
} else {
// Draw the line number (empty space after wrapping).
if (row == startrow + filler_lines) {
get_line_number_str(wp, lnum, (char_u *)extra, sizeof(extra));
if (wp->w_skipcol > 0) {
for (p_extra = extra; *p_extra == ' '; p_extra++) {
*p_extra = '-';
}
}
if (wp->w_p_rl) { // reverse line numbers
// like rl_mirror(), but keep the space at the end
char_u *p2 = (char_u *)skipwhite((char *)extra);
p2 = (char_u *)skiptowhite((char *)p2) - 1;
for (char_u *p1 = (char_u *)skipwhite((char *)extra); p1 < p2; p1++, p2--) {
const char_u t = *p1;
*p1 = *p2;
*p2 = t;
}
}
p_extra = extra;
c_extra = NUL;
} else {
c_extra = ' ';
}
c_final = NUL;
n_extra = number_width(wp) + 1;
if (sign_num_attr > 0) {
char_attr = sign_num_attr;
} else {
char_attr = get_line_number_attr(wp, lnum, row, startrow, filler_lines);
}
}
}
}
if (draw_state == WL_NR && n_extra == 0) {
win_col_offset = off;
}
if (wp->w_briopt_sbr && draw_state == WL_BRI - 1
&& n_extra == 0 && *get_showbreak_value(wp) != NUL) {
// draw indent after showbreak value
draw_state = WL_BRI;
} else if (wp->w_briopt_sbr && 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 && (row != startrow || need_showbreak)
&& filler_lines == 0) {
char_attr = 0;
if (diff_hlf != (hlf_T)0) {
char_attr = win_hl_attr(wp, (int)diff_hlf);
}
p_extra = NULL;
c_extra = ' ';
c_final = NUL;
n_extra =
get_breakindent_win(wp, (char_u *)ml_get_buf(wp->w_buffer, lnum, false));
if (row == startrow) {
n_extra -= win_col_off2(wp);
if (n_extra < 0) {
n_extra = 0;
}
}
if (wp->w_skipcol > 0 && wp->w_p_wrap && wp->w_briopt_sbr) {
need_showbreak = false;
}
// Correct end of highlighted area for 'breakindent',
// required wen 'linebreak' is also set.
if (tocol == vcol) {
tocol += n_extra;
}
}
}
if (draw_state == WL_SBR - 1 && n_extra == 0) {
draw_state = WL_SBR;
if (filler_todo > filler_lines - n_virt_lines) {
// TODO(bfredl): check this doesn't inhibit TUI-style
// clear-to-end-of-line.
c_extra = ' ';
c_final = NUL;
if (wp->w_p_rl) {
n_extra = col + 1;
} else {
n_extra = grid->cols - col;
}
char_attr = 0;
} else if (filler_todo > 0) {
// Draw "deleted" diff line(s)
if (char2cells(wp->w_p_fcs_chars.diff) > 1) {
c_extra = '-';
c_final = NUL;
} else {
c_extra = wp->w_p_fcs_chars.diff;
c_final = NUL;
}
if (wp->w_p_rl) {
n_extra = col + 1;
} else {
n_extra = grid->cols - col;
}
char_attr = win_hl_attr(wp, HLF_DED);
}
char_u *const sbr = get_showbreak_value(wp);
if (*sbr != NUL && need_showbreak) {
// Draw 'showbreak' at the start of each broken line.
p_extra = sbr;
c_extra = NUL;
c_final = NUL;
n_extra = (int)STRLEN(sbr);
char_attr = win_hl_attr(wp, HLF_AT);
if (wp->w_skipcol == 0 || !wp->w_p_wrap) {
need_showbreak = false;
}
vcol_sbr = vcol + mb_charlen(sbr);
// Correct end of highlighted area for 'showbreak',
// required when 'linebreak' is also set.
if (tocol == vcol) {
tocol += n_extra;
}
// Combine 'showbreak' with 'cursorline', prioritizing 'showbreak'.
if (cul_attr) {
char_attr = hl_combine_attr(cul_attr, char_attr);
}
}
}
if (draw_state == WL_LINE - 1 && n_extra == 0) {
sign_idx = 0;
draw_state = WL_LINE;
if (has_decor && row == startrow + filler_lines) {
// hide virt_text on text hidden by 'nowrap'
decor_redraw_col(wp->w_buffer, (int)vcol, off, true, &decor_state);
}
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 = 0;
}
}
}
if (cul_screenline && draw_state == WL_LINE
&& vcol >= left_curline_col
&& vcol < right_curline_col) {
apply_cursorline_highlight(wp, lnum, &line_attr, &cul_attr, &line_attr_lowprio);
}
// When still displaying '$' of change command, stop at cursor
if (((dollar_vcol >= 0
&& wp == curwin
&& lnum == wp->w_cursor.lnum
&& vcol >= (long)wp->w_virtcol)
|| (number_only && draw_state > WL_NR))
&& filler_todo <= 0) {
draw_virt_text(wp, buf, win_col_offset, &col, grid->cols, row);
grid_put_linebuf(grid, row, 0, col, -grid->cols, wp->w_p_rl, wp, bg_attr, false);
// Pretend we have finished updating the window. Except when
// 'cursorcolumn' is set.
if (wp->w_p_cuc) {
row = wp->w_cline_row + wp->w_cline_height;
} else {
row = grid->rows;
}
break;
}
if (draw_state == WL_LINE
&& has_fold
&& col == win_col_offset
&& n_extra == 0
&& row == startrow) {
char_attr = win_hl_attr(wp, HLF_FL);
linenr_T lnume = lnum + foldinfo.fi_lines - 1;
memset(buf_fold, ' ', FOLD_TEXT_LEN);
p_extra = (char_u *)get_foldtext(wp, lnum, lnume, foldinfo, (char *)buf_fold);
n_extra = (int)STRLEN(p_extra);
if (p_extra != buf_fold) {
xfree(p_extra_free);
p_extra_free = p_extra;
}
c_extra = NUL;
c_final = NUL;
p_extra[n_extra] = NUL;
}
if (draw_state == WL_LINE
&& has_fold
&& col < grid->cols
&& n_extra == 0
&& row == startrow) {
// fill rest of line with 'fold'
c_extra = wp->w_p_fcs_chars.fold;
c_final = NUL;
n_extra = wp->w_p_rl ? (col + 1) : (grid->cols - col);
}
if (draw_state == WL_LINE
&& has_fold
&& col >= grid->cols
&& n_extra != 0
&& row == startrow) {
// Truncate the folding.
n_extra = 0;
}
if (draw_state == WL_LINE && (area_highlighting || has_spell)) {
// handle Visual or match highlighting in this line
if (vcol == fromcol
|| (vcol + 1 == fromcol && n_extra == 0
&& utf_ptr2cells((char *)ptr) > 1)
|| ((int)vcol_prev == fromcol_prev
&& vcol_prev < vcol // not at margin
&& vcol < tocol)) {
area_attr = attr; // start highlighting
if (area_highlighting) {
area_active = true;
}
} else if (area_attr != 0 && (vcol == tocol
|| (noinvcur
&& (colnr_T)vcol == wp->w_virtcol))) {
area_attr = 0; // stop highlighting
area_active = false;
}
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 = (ptr - line);
search_attr = update_search_hl(wp, lnum, (colnr_T)v, &line, &screen_search_hl,
&has_match_conc,
&match_conc, lcs_eol_one, &search_attr_from_match);
ptr = line + v; // "line" may have been changed
// Do not allow a conceal over EOL otherwise EOL will be missed
// and bad things happen.
if (*ptr == NUL) {
has_match_conc = 0;
}
}
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 = win_hl_attr(wp, (int)diff_hlf);
// Overlay CursorLine onto diff-mode highlight.
if (cul_attr) {
line_attr = 0 != line_attr_lowprio // Low-priority CursorLine
? hl_combine_attr(hl_combine_attr(cul_attr, line_attr),
hl_get_underline())
: hl_combine_attr(line_attr, cul_attr);
}
}
// Decide which of the highlight attributes to use.
attr_pri = true;
if (area_attr != 0) {
char_attr = hl_combine_attr(line_attr, area_attr);
if (!highlight_match) {
// let search highlight show in Visual area if possible
char_attr = hl_combine_attr(search_attr, char_attr);
}
} else if (search_attr != 0) {
char_attr = hl_combine_attr(line_attr, search_attr);
} 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;
} else {
attr_pri = false;
if (has_syntax) {
char_attr = syntax_attr;
} else {
char_attr = 0;
}
}
}
// 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 utfc_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!
mb_utf8 = check_mb_utf8(&c, u8cc);
} else {
assert(p_extra != NULL);
c = *p_extra;
mb_c = c;
// If the UTF-8 character is more than one byte:
// Decode it into "mb_c".
mb_l = utfc_ptr2len((char *)p_extra);
mb_utf8 = false;
if (mb_l > n_extra) {
mb_l = 1;
} else if (mb_l > 1) {
mb_c = utfc_ptr2char((char *)p_extra, u8cc);
mb_utf8 = true;
c = 0xc0;
}
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 ((wp->w_p_rl ? (col <= 0) : (col >= grid->cols - 1))
&& utf_char2cells(mb_c) == 2) {
c = '>';
mb_c = c;
mb_l = 1;
(void)mb_l;
multi_attr = win_hl_attr(wp, HLF_AT);
if (cul_attr) {
multi_attr = 0 != line_attr_lowprio
? hl_combine_attr(cul_attr, multi_attr)
: hl_combine_attr(multi_attr, cul_attr);
}
// 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 if (foldinfo.fi_lines > 0) {
// skip writing the buffer line itself
c = NUL;
XFREE_CLEAR(p_extra_free);
} else {
int c0;
XFREE_CLEAR(p_extra_free);
// Get a character from the line itself.
c0 = c = *ptr;
mb_c = c;
// If the UTF-8 character is more than one byte: Decode it
// into "mb_c".
mb_l = utfc_ptr2len((char *)ptr);
mb_utf8 = false;
if (mb_l > 1) {
mb_c = utfc_ptr2char((char *)ptr, u8cc);
// Overlong encoded ASCII or ASCII with composing char
// is displayed normally, except a NUL.
if (mb_c < 0x80) {
c0 = c = mb_c;
}
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 = MAX_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((char *)extra, mb_c);
if (wp->w_p_rl) { // reverse
rl_mirror(extra);
}
p_extra = extra;
c = *p_extra;
mb_c = mb_ptr2char_adv((const char_u **)&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 = win_hl_attr(wp, HLF_8);
saved_attr2 = char_attr; // save current attr
}
} else if (mb_l == 0) { // at the NUL at end-of-line
mb_l = 1;
} 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((char *)ptr + mb_l);
prev_c1 = u8cc[0];
} else {
pc = utfc_ptr2char((char *)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;
}
// 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 ((wp->w_p_rl ? (col <= 0) :
(col >= grid->cols - 1))
&& utf_char2cells(mb_c) == 2) {
c = '>';
mb_c = c;
mb_utf8 = false;
mb_l = 1;
multi_attr = win_hl_attr(wp, HLF_AT);
// Put pointer back so that the character will be
// displayed at the start of the next line.
ptr--;
did_decrement_ptr = true;
} 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 = win_hl_attr(wp, HLF_AT);
saved_attr2 = char_attr; // save current attr
}
mb_c = c;
mb_utf8 = false;
mb_l = 1;
}
ptr++;
if (extra_check) {
bool no_plain_buffer = (wp->w_s->b_p_spo_flags & SPO_NPBUFFER) != 0;
bool can_spell = !no_plain_buffer;
// Get syntax attribute, unless still at the start of the line
// (double-wide char that doesn't fit).
v = (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,
has_spell ? &can_spell : NULL, false);
if (did_emsg) {
wp->w_s->b_syn_error = true;
has_syntax = false;
} else {
did_emsg = save_did_emsg;
}
if (wp->w_s->b_syn_slow) {
has_syntax = false;
}
// Need to get the line again, a multi-line regexp may
// have made it invalid.
line = (char_u *)ml_get_buf(wp->w_buffer, lnum, false);
ptr = line + v;
if (!attr_pri) {
if (cul_attr) {
char_attr = 0 != line_attr_lowprio
? hl_combine_attr(cul_attr, syntax_attr)
: hl_combine_attr(syntax_attr, cul_attr);
} else {
char_attr = syntax_attr;
}
} else {
char_attr = hl_combine_attr(syntax_attr, char_attr);
}
// 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);
}
} else if (!attr_pri) {
char_attr = 0;
}
if (has_decor && v > 0) {
bool selected = (area_active || (area_highlighting && noinvcur
&& (colnr_T)vcol == wp->w_virtcol));
int extmark_attr = decor_redraw_col(wp->w_buffer, (colnr_T)v - 1, off,
selected, &decor_state);
if (extmark_attr != 0) {
if (!attr_pri) {
char_attr = hl_combine_attr(char_attr, extmark_attr);
} else {
char_attr = hl_combine_attr(extmark_attr, char_attr);
}
}
decor_conceal = decor_state.conceal;
if (decor_conceal && decor_state.conceal_char) {
decor_conceal = 2; // really??
}
if (decor_state.spell) {
can_spell = true;
}
}
// 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.
v = (ptr - line);
if (has_spell && v >= word_end && v > cur_checked_col) {
spell_attr = 0;
if (!attr_pri) {
char_attr = hl_combine_attr(char_attr, syntax_attr);
}
if (c != 0 && ((!has_syntax && !no_plain_buffer) || can_spell)) {
char_u *prev_ptr;
char_u *p;
int len;
hlf_T spell_hlf = HLF_COUNT;
prev_ptr = ptr - mb_l;
v -= mb_l - 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);
size_t tmplen = spell_check(wp, p, &spell_hlf, &cap_col, nochange);
assert(tmplen <= INT_MAX);
len = (int)tmplen;
word_end = (int)v + len;
// In Insert mode only highlight a word that
// doesn't touch the cursor.
if (spell_hlf != HLF_COUNT
&& (State & MODE_INSERT)
&& 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);
}
}
if (wp->w_buffer->terminal) {
char_attr = hl_combine_attr(term_attrs[vcol], char_attr);
}
// 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 = utf_head_off((char *)line, (char *)ptr - 1);
char_u *p = ptr - (mb_off + 1);
chartabsize_T cts;
init_chartabsize_arg(&cts, wp, lnum, (colnr_T)vcol, (char *)line, (char *)p);
n_extra = win_lbr_chartabsize(&cts, NULL) - 1;
// We have just drawn the showbreak value, no need to add
// space for it again.
if (vcol == vcol_sbr) {
n_extra -= mb_charlen(get_showbreak_value(wp));
if (n_extra < 0) {
n_extra = 0;
}
}
if (c == TAB && n_extra + col > grid->cols) {
n_extra = tabstop_padding((colnr_T)vcol, wp->w_buffer->b_p_ts,
wp->w_buffer->b_p_vts_array) - 1;
}
c_extra = mb_off > 0 ? MB_FILLER_CHAR : ' ';
c_final = NUL;
if (ascii_iswhite(c)) {
if (c == TAB) {
// See "Tab alignment" below.
FIX_FOR_BOGUSCOLS;
}
if (!wp->w_p_list) {
c = ' ';
}
}
clear_chartabsize_arg(&cts);
}
in_multispace = c == ' ' && ((ptr > line + 1 && ptr[-2] == ' ') || *ptr == ' ');
if (!in_multispace) {
multispace_pos = 0;
}
// 'list': Change char 160 to 'nbsp' and space to '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))))
&& wp->w_p_lcs_chars.nbsp)
|| (c == ' '
&& mb_l == 1
&& (wp->w_p_lcs_chars.space
|| (in_multispace && wp->w_p_lcs_chars.multispace != NULL))
&& ptr - line >= leadcol
&& ptr - line <= trailcol))) {
if (in_multispace && wp->w_p_lcs_chars.multispace != NULL) {
c = wp->w_p_lcs_chars.multispace[multispace_pos++];
if (wp->w_p_lcs_chars.multispace[multispace_pos] == NUL) {
multispace_pos = 0;
}
} else {
c = (c == ' ') ? wp->w_p_lcs_chars.space : wp->w_p_lcs_chars.nbsp;
}
n_attr = 1;
extra_attr = win_hl_attr(wp, HLF_0);
saved_attr2 = char_attr; // save current attr
mb_c = c;
mb_utf8 = check_mb_utf8(&c, u8cc);
}
if (c == ' ' && ((trailcol != MAXCOL && ptr > line + trailcol)
|| (leadcol != 0 && ptr < line + leadcol))) {
if (leadcol != 0 && in_multispace && ptr < line + leadcol
&& wp->w_p_lcs_chars.leadmultispace != NULL) {
c = wp->w_p_lcs_chars.leadmultispace[multispace_pos++];
if (wp->w_p_lcs_chars.leadmultispace[multispace_pos] == NUL) {
multispace_pos = 0;
}
} else if (ptr > line + trailcol && wp->w_p_lcs_chars.trail) {
c = wp->w_p_lcs_chars.trail;
} else if (ptr < line + leadcol && wp->w_p_lcs_chars.lead) {
c = wp->w_p_lcs_chars.lead;
} else if (leadcol != 0 && wp->w_p_lcs_chars.space) {
c = wp->w_p_lcs_chars.space;
}
n_attr = 1;
extra_attr = win_hl_attr(wp, HLF_0);
saved_attr2 = char_attr; // save current attr
mb_c = c;
mb_utf8 = check_mb_utf8(&c, u8cc);
}
}
// 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 on the screen.
if (c == TAB && (!wp->w_p_list || wp->w_p_lcs_chars.tab1)) {
int tab_len = 0;
long vcol_adjusted = vcol; // removed showbreak length
char_u *const sbr = get_showbreak_value(wp);
// Only adjust the tab_len, when at the first column after the
// showbreak value was drawn.
if (*sbr != NUL && vcol == vcol_sbr && wp->w_p_wrap) {
vcol_adjusted = vcol - mb_charlen(sbr);
}
// tab amount depends on current column
tab_len = tabstop_padding((colnr_T)vcol_adjusted,
wp->w_buffer->b_p_ts,
wp->w_buffer->b_p_vts_array) - 1;
if (!wp->w_p_lbr || !wp->w_p_list) {
n_extra = tab_len;
} else {
char_u *p;
int i;
int saved_nextra = n_extra;
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_lcs_chars.tab1 && old_boguscols > 0
&& n_extra > tab_len) {
tab_len += n_extra - tab_len;
}
// 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.
int len = (tab_len * utf_char2len(wp->w_p_lcs_chars.tab2));
if (wp->w_p_lcs_chars.tab3) {
len += utf_char2len(wp->w_p_lcs_chars.tab3);
}
if (n_extra > 0) {
len += n_extra - tab_len;
}
c = wp->w_p_lcs_chars.tab1;
p = xmalloc((size_t)len + 1);
memset(p, ' ', (size_t)len);
p[len] = NUL;
xfree(p_extra_free);
p_extra_free = p;
for (i = 0; i < tab_len; i++) {
if (*p == NUL) {
tab_len = i;
break;
}
int lcs = wp->w_p_lcs_chars.tab2;
// if tab3 is given, use it for the last char
if (wp->w_p_lcs_chars.tab3 && i == tab_len - 1) {
lcs = wp->w_p_lcs_chars.tab3;
}
p += utf_char2bytes(lcs, (char *)p);
n_extra += utf_char2len(lcs) - (saved_nextra > 0 ? 1 : 0);
}
p_extra = p_extra_free;
// 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;
}
}
{
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
&& wp->w_p_lcs_chars.tab1) {
tab_len += vc_saved;
}
}
mb_utf8 = false; // don't draw as UTF-8
if (wp->w_p_list) {
c = (n_extra == 0 && wp->w_p_lcs_chars.tab3)
? wp->w_p_lcs_chars.tab3
: wp->w_p_lcs_chars.tab1;
if (wp->w_p_lbr) {
c_extra = NUL; // using p_extra from above
} else {
c_extra = wp->w_p_lcs_chars.tab2;
}
c_final = wp->w_p_lcs_chars.tab3;
n_attr = tab_len + 1;
extra_attr = win_hl_attr(wp, HLF_0);
saved_attr2 = char_attr; // save current attr
mb_c = c;
mb_utf8 = check_mb_utf8(&c, u8cc);
} 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
&& (wp->w_p_rl ? (col >= 0) : (col < grid->cols))
&& !(noinvcur
&& lnum == wp->w_cursor.lnum
&& (colnr_T)vcol == wp->w_virtcol)))
&& lcs_eol_one > 0) {
// Display a '$' after the line or highlight an extra
// character if the line break is included.
// For a diff line the highlighting continues after the "$".
if (diff_hlf == (hlf_T)0
&& line_attr == 0
&& line_attr_lowprio == 0) {
// 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 && wp->w_p_lcs_chars.eol > 0) {
c = wp->w_p_lcs_chars.eol;
} else {
c = ' ';
}
lcs_eol_one = -1;
ptr--; // put it back at the NUL
extra_attr = win_hl_attr(wp, HLF_AT);
n_attr = 1;
mb_c = c;
mb_utf8 = check_mb_utf8(&c, u8cc);
} else if (c != NUL) {
p_extra = transchar_buf(wp->w_buffer, c);
if (n_extra == 0) {
n_extra = byte2cells(c) - 1;
}
if ((dy_flags & DY_UHEX) && wp->w_p_rl) {
rl_mirror(p_extra); // reverse "<12>"
}
c_extra = NUL;
c_final = NUL;
if (wp->w_p_lbr) {
char_u *p;
c = *p_extra;
p = xmalloc((size_t)n_extra + 1);
memset(p, ' ', (size_t)n_extra);
STRNCPY(p, p_extra + 1, STRLEN(p_extra) - 1); // NOLINT(runtime/printf)
p[n_extra] = NUL;
xfree(p_extra_free);
p_extra_free = p_extra = p;
} else {
n_extra = byte2cells(c) - 1;
c = *p_extra++;
}
n_attr = n_extra + 1;
extra_attr = win_hl_attr(wp, 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
&& (wp->w_p_rl ? (col >= 0) : (col < grid->cols))) {
c = ' ';
ptr--; // put it back at the NUL
}
}
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 || decor_conceal > 0)
&& !(lnum_in_visual_area && vim_strchr(wp->w_p_cocu, 'v') == NULL)) {
char_attr = conceal_attr;
if (((prev_syntax_id != syntax_seqnr && (syntax_flags & HL_CONCEAL) != 0)
|| has_match_conc > 1 || decor_conceal > 1)
&& (syn_get_sub_char() != NUL
|| (has_match_conc && match_conc)
|| (decor_conceal && decor_state.conceal_char)
|| wp->w_p_cole == 1)
&& wp->w_p_cole != 3) {
// First time at this concealed item: display one
// character.
if (has_match_conc && match_conc) {
c = match_conc;
} else if (decor_conceal && decor_state.conceal_char) {
c = decor_state.conceal_char;
if (decor_state.conceal_attr) {
char_attr = decor_state.conceal_attr;
}
} else if (syn_get_sub_char() != NUL) {
c = syn_get_sub_char();
} else if (wp->w_p_lcs_chars.conceal != NUL) {
c = wp->w_p_lcs_chars.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) {
if (wp->w_p_rl) {
col -= n_extra;
boguscols -= n_extra;
} else {
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;
mb_utf8 = check_mb_utf8(&c, u8cc);
} 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++;
}
} // end of printing from buffer content
// 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) {
if (wp->w_p_rl) {
wp->w_wcol = grid->cols - col + boguscols - 1;
} else {
wp->w_wcol = col - boguscols;
}
wp->w_wrow = row;
did_wcol = true;
wp->w_valid |= VALID_WCOL|VALID_WROW|VALID_VIRTCOL;
}
// Don't override visual selection highlighting.
if (n_attr > 0 && draw_state == WL_LINE && !search_attr_from_match) {
char_attr = hl_combine_attr(char_attr, extra_attr);
}
// 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 && row == 0) : wp->w_leftcol > 0)
&& filler_todo <= 0
&& draw_state > WL_NR
&& c != NUL) {
c = wp->w_p_lcs_chars.prec;
lcs_prec_todo = NUL;
if (utf_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 = win_hl_attr(wp, HLF_AT);
}
mb_c = c;
mb_utf8 = check_mb_utf8(&c, u8cc);
saved_attr3 = char_attr; // save current attr
char_attr = win_hl_attr(wp, HLF_AT); // overwriting char_attr
n_attr3 = 1;
}
// At end of the text line or just after the last character.
if (c == NUL && eol_hl_off == 0) {
// flag to indicate whether prevcol equals startcol of search_hl or
// one of the matches
bool prevcol_hl_flag = get_prevcol_hl_flag(wp, &screen_search_hl,
(long)(ptr - line) - 1);
// 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 (wp->w_p_lcs_chars.eol == lcs_eol_one
&& ((area_attr != 0 && vcol == fromcol
&& (VIsual_mode != Ctrl_V
|| lnum == VIsual.lnum
|| lnum == curwin->w_cursor.lnum))
// highlight 'hlsearch' match at end of line
|| prevcol_hl_flag)) {
int n = 0;
if (wp->w_p_rl) {
if (col < 0) {
n = 1;
}
} else {
if (col >= grid->cols) {
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.
schar_from_ascii(linebuf_char[off], ' ');
}
if (area_attr == 0 && !has_fold) {
// 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);
}
int eol_attr = char_attr;
if (cul_attr) {
eol_attr = hl_combine_attr(cul_attr, eol_attr);
}
linebuf_attr[off] = eol_attr;
if (wp->w_p_rl) {
col--;
off--;
} else {
col++;
off++;
}
vcol++;
eol_hl_off = 1;
}
// 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);
}
// Get rid of the boguscols now, we want to draw until the right
// edge for 'cursorcolumn'.
col -= boguscols;
// boguscols = 0; // Disabled because value never read after this
if (draw_color_col) {
draw_color_col = advance_color_col((int)VCOL_HLC, &color_cols);
}
bool has_virttext = false;
// Make sure alignment is the same regardless
// if listchars=eol:X is used or not.
int eol_skip = (wp->w_p_lcs_chars.eol == lcs_eol_one && eol_hl_off == 0
? 1 : 0);
if (has_decor) {
has_virttext = decor_redraw_eol(wp->w_buffer, &decor_state, &line_attr,
col + eol_skip);
}
if (((wp->w_p_cuc
&& (int)wp->w_virtcol >= VCOL_HLC - eol_hl_off
&& (int)wp->w_virtcol <
(long)grid->cols * (row - startrow + 1) + v
&& lnum != wp->w_cursor.lnum)
|| draw_color_col || line_attr_lowprio || line_attr
|| diff_hlf != (hlf_T)0 || has_virttext)) {
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];
}
}
}
int cuc_attr = win_hl_attr(wp, HLF_CUC);
int mc_attr = win_hl_attr(wp, HLF_MC);
int diff_attr = 0;
if (diff_hlf == HLF_TXD) {
diff_hlf = HLF_CHD;
}
if (diff_hlf != 0) {
diff_attr = win_hl_attr(wp, (int)diff_hlf);
}
int base_attr = hl_combine_attr(line_attr_lowprio, diff_attr);
if (base_attr || line_attr || has_virttext) {
rightmost_vcol = INT_MAX;
}
int col_stride = wp->w_p_rl ? -1 : 1;
while (wp->w_p_rl ? col >= 0 : col < grid->cols) {
schar_from_ascii(linebuf_char[off], ' ');
col += col_stride;
if (draw_color_col) {
draw_color_col = advance_color_col((int)VCOL_HLC, &color_cols);
}
int col_attr = base_attr;
if (wp->w_p_cuc && VCOL_HLC == (long)wp->w_virtcol) {
col_attr = cuc_attr;
} else if (draw_color_col && VCOL_HLC == *color_cols) {
col_attr = mc_attr;
}
col_attr = hl_combine_attr(col_attr, line_attr);
linebuf_attr[off] = col_attr;
off += col_stride;
if (VCOL_HLC >= rightmost_vcol) {
break;
}
vcol += 1;
}
}
// TODO(bfredl): integrate with the common beyond-the-end-loop
if (wp->w_buffer->terminal) {
// terminal buffers may need to highlight beyond the end of the
// logical line
int n = wp->w_p_rl ? -1 : 1;
while (col >= 0 && col < grid->cols) {
schar_from_ascii(linebuf_char[off], ' ');
linebuf_attr[off] = vcol >= TERM_ATTRS_MAX ? 0 : term_attrs[vcol];
off += n;
vcol += n;
col += n;
}
}
draw_virt_text(wp, buf, win_col_offset, &col, grid->cols, row);
grid_put_linebuf(grid, row, 0, col, grid->cols, wp->w_p_rl, wp, bg_attr, false);
row++;
// Update w_cline_height and w_cline_folded if the cursor line was
// updated (saves a call to plines_win() later).
if (wp == curwin && lnum == curwin->w_cursor.lnum) {
curwin->w_cline_row = startrow;
curwin->w_cline_height = row - startrow;
curwin->w_cline_folded = foldinfo.fi_lines > 0;
curwin->w_valid |= (VALID_CHEIGHT|VALID_CROW);
conceal_cursor_used = conceal_cursor_line(curwin);
}
break;
}
// Show "extends" character from 'listchars' if beyond the line end and
// 'list' is set.
if (wp->w_p_lcs_chars.ext != NUL
&& draw_state == WL_LINE
&& wp->w_p_list
&& !wp->w_p_wrap
&& filler_todo <= 0
&& (wp->w_p_rl ? col == 0 : col == grid->cols - 1)
&& !has_fold
&& (*ptr != NUL
|| lcs_eol_one > 0
|| (n_extra && (c_extra != NUL || *p_extra != NUL)))) {
c = wp->w_p_lcs_chars.ext;
char_attr = win_hl_attr(wp, HLF_AT);
mb_c = c;
mb_utf8 = check_mb_utf8(&c, u8cc);
}
// advance to the next 'colorcolumn'
if (draw_color_col) {
draw_color_col = advance_color_col((int)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'
// Also highlight the 'colorcolumn' if 'breakindent' and/or 'showbreak'
// options are set
vcol_save_attr = -1;
if ((draw_state == WL_LINE
|| draw_state == WL_BRI
|| draw_state == WL_SBR)
&& !lnum_in_visual_area
&& search_attr == 0
&& area_attr == 0
&& filler_todo <= 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(win_hl_attr(wp, HLF_CUC), char_attr);
} else if (draw_color_col && VCOL_HLC == *color_cols) {
vcol_save_attr = char_attr;
char_attr = hl_combine_attr(win_hl_attr(wp, HLF_MC), char_attr);
}
}
// Apply lowest-priority line attr now, so everything can override it.
if (draw_state == WL_LINE) {
char_attr = hl_combine_attr(line_attr_lowprio, char_attr);
}
// 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 (wp->w_p_rl && utf_char2cells(mb_c) > 1) {
// A double-wide character is: put first half in left cell.
off--;
col--;
}
if (mb_utf8) {
schar_from_cc(linebuf_char[off], mb_c, u8cc);
} else {
schar_from_ascii(linebuf_char[off], (char)c);
}
if (multi_attr) {
linebuf_attr[off] = multi_attr;
multi_attr = 0;
} else {
linebuf_attr[off] = char_attr;
}
if (utf_char2cells(mb_c) > 1) {
// Need to fill two screen columns.
off++;
col++;
// UTF-8: Put a 0 in the second screen char.
linebuf_char[off][0] = 0;
if (draw_state > WL_NR && filler_todo <= 0) {
vcol++;
}
// When "tocol" is halfway through a character, set it to the end of
// the character, otherwise highlighting won't stop.
if (tocol == vcol) {
tocol++;
}
if (wp->w_p_rl) {
// now it's time to backup one cell
off--;
col--;
}
}
if (wp->w_p_rl) {
off--;
col--;
} else {
off++;
col++;
}
} 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;
if (wp->w_p_rl) {
col -= n_extra;
boguscols -= n_extra;
} else {
col += n_extra;
boguscols += n_extra;
}
n_extra = 0;
n_attr = 0;
}
if (utf_char2cells(mb_c) > 1) {
// Need to fill two screen columns.
if (wp->w_p_rl) {
boguscols--;
col--;
} else {
boguscols++;
col++;
}
}
if (wp->w_p_rl) {
boguscols--;
col--;
} else {
boguscols++;
col++;
}
} else {
if (n_extra > 0) {
vcol += n_extra;
n_extra = 0;
n_attr = 0;
}
}
} else {
n_skip--;
}
// Only advance the "vcol" when after the 'number' or 'relativenumber'
// column.
if (draw_state > WL_NR
&& filler_todo <= 0) {
vcol++;
}
if (vcol_save_attr >= 0) {
char_attr = vcol_save_attr;
}
// 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 ((wp->w_p_rl ? (col < 0) : (col >= grid->cols))
&& foldinfo.fi_lines == 0
&& (draw_state != WL_LINE
|| *ptr != NUL
|| filler_todo > 0
|| (wp->w_p_list && wp->w_p_lcs_chars.eol != NUL
&& p_extra != at_end_str)
|| (n_extra != 0
&& (c_extra != NUL || *p_extra != NUL)))) {
bool wrap = wp->w_p_wrap // Wrapping enabled.
&& filler_todo <= 0 // Not drawing diff filler lines.
&& lcs_eol_one != -1 // Haven't printed the lcs_eol character.
&& row != endrow - 1 // Not the last line being displayed.
&& (grid->cols == Columns // Window spans the width of the screen,
|| ui_has(kUIMultigrid)) // or has dedicated grid.
&& !wp->w_p_rl; // Not right-to-left.
int draw_col = col - boguscols;
if (filler_todo > 0) {
int index = filler_todo - (filler_lines - n_virt_lines);
if (index > 0) {
int i = (int)kv_size(virt_lines) - index;
assert(i >= 0);
int offset = kv_A(virt_lines, i).left_col ? 0 : win_col_offset;
draw_virt_text_item(buf, offset, kv_A(virt_lines, i).line,
kHlModeReplace, grid->cols, offset);
}
} else {
draw_virt_text(wp, buf, win_col_offset, &draw_col, grid->cols, row);
}
grid_put_linebuf(grid, row, 0, draw_col, grid->cols, wp->w_p_rl, wp, bg_attr, wrap);
if (wrap) {
ScreenGrid *current_grid = grid;
int current_row = row, dummy_col = 0; // dummy_col unused
grid_adjust(&current_grid, &current_row, &dummy_col);
// Force a redraw of the first column of the next line.
current_grid->attrs[current_grid->line_offset[current_row + 1]] = -1;
// Remember that the line wraps, used for modeless copy.
current_grid->line_wraps[current_row] = true;
}
boguscols = 0;
row++;
// When not wrapping and finished diff lines, or when displayed
// '$' and highlighting until last column, break here.
if ((!wp->w_p_wrap && filler_todo <= 0) || lcs_eol_one == -1) {
break;
}
// When the window is too narrow draw all "@" lines.
if (draw_state != WL_LINE && filler_todo <= 0) {
win_draw_end(wp, '@', ' ', true, row, wp->w_grid.rows, HLF_AT);
set_empty_rows(wp, row);
row = endrow;
}
// When line got too long for screen break here.
if (row == endrow) {
row++;
break;
}
col = 0;
off = 0;
if (wp->w_p_rl) {
col = grid->cols - 1; // col is not used if breaking!
off += col;
}
// 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;
saved_char_attr = char_attr;
n_extra = 0;
lcs_prec_todo = wp->w_p_lcs_chars.prec;
if (filler_todo <= 0) {
need_showbreak = true;
}
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 || end_fill)) {
break;
}
}
} // for every character in the line
// After an empty line check first word for capital.
if (*skipwhite((char *)line) == NUL) {
capcol_lnum = lnum + 1;
cap_col = 0;
}
kv_destroy(virt_lines);
xfree(p_extra_free);
return row;
}
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