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neovim/src/nvim/match.c
luukvbaal 5a41f7e69c vim-patch:9.1.1136: Match highlighting marks a buffer region as changed (#32561) 
Problem:  Match highlighting marks a buffer region to be redrawn as if
          its buffer text was changed, unnecessarily invoking syntax code.
Solution: Set the `w_redraw_top/bot` variables instead of the b_mod_* ones
          (Luuk van Baal)

7bbb0f357e
2025-02-23 16:35:26 +08:00

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// match.c: functions for highlighting matches
#include <assert.h>
#include <inttypes.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include "nvim/ascii_defs.h"
#include "nvim/buffer_defs.h"
#include "nvim/charset.h"
#include "nvim/drawscreen.h"
#include "nvim/errors.h"
#include "nvim/eval/funcs.h"
#include "nvim/eval/typval.h"
#include "nvim/eval/window.h"
#include "nvim/ex_cmds_defs.h"
#include "nvim/ex_docmd.h"
#include "nvim/fold.h"
#include "nvim/gettext_defs.h"
#include "nvim/globals.h"
#include "nvim/highlight.h"
#include "nvim/highlight_defs.h"
#include "nvim/highlight_group.h"
#include "nvim/macros_defs.h"
#include "nvim/match.h"
#include "nvim/mbyte.h"
#include "nvim/mbyte_defs.h"
#include "nvim/memline.h"
#include "nvim/memory.h"
#include "nvim/message.h"
#include "nvim/option_vars.h"
#include "nvim/pos_defs.h"
#include "nvim/profile.h"
#include "nvim/regexp.h"
#include "nvim/strings.h"
#include "nvim/types_defs.h"
#include "nvim/vim_defs.h"
#ifdef INCLUDE_GENERATED_DECLARATIONS
# include "match.c.generated.h"
#endif
static const char *e_invalwindow = N_("E957: Invalid window number");
#define SEARCH_HL_PRIORITY 0
/// Add match to the match list of window "wp".
/// If "pat" is not NULL the pattern will be highlighted with the group "grp"
/// with priority "prio".
/// If "pos_list" is not NULL the list of posisions defines the highlights.
/// Optionally, a desired ID "id" can be specified (greater than or equal to 1).
/// If no particular ID is desired, -1 must be specified for "id".
///
/// @param[in] conceal_char pointer to conceal replacement char
/// @return ID of added match, -1 on failure.
static int match_add(win_T *wp, const char *const grp, const char *const pat, int prio, int id,
list_T *pos_list, const char *const conceal_char)
FUNC_ATTR_NONNULL_ARG(1, 2)
{
int hlg_id;
regprog_T *regprog = NULL;
int rtype = UPD_SOME_VALID;
if (*grp == NUL || (pat != NULL && *pat == NUL)) {
return -1;
}
if (id < -1 || id == 0) {
semsg(_("E799: Invalid ID: %" PRId64
" (must be greater than or equal to 1)"),
(int64_t)id);
return -1;
}
if (id == -1) {
// use the next available match ID
id = wp->w_next_match_id++;
} else {
// check the given ID is not already in use
for (matchitem_T *cur = wp->w_match_head; cur != NULL; cur = cur->mit_next) {
if (cur->mit_id == id) {
semsg(_("E801: ID already taken: %" PRId64), (int64_t)id);
return -1;
}
}
// Make sure the next match ID is always higher than the highest
// manually selected ID. Add some extra in case a few more IDs are
// added soon.
if (wp->w_next_match_id < id + 100) {
wp->w_next_match_id = id + 100;
}
}
if ((hlg_id = syn_check_group(grp, strlen(grp))) == 0) {
return -1;
}
if (pat != NULL && (regprog = vim_regcomp(pat, RE_MAGIC)) == NULL) {
semsg(_(e_invarg2), pat);
return -1;
}
// Build new match.
matchitem_T *m = xcalloc(1, sizeof(matchitem_T));
if (tv_list_len(pos_list) > 0) {
m->mit_pos_array = xcalloc((size_t)tv_list_len(pos_list), sizeof(llpos_T));
m->mit_pos_count = tv_list_len(pos_list);
}
m->mit_id = id;
m->mit_priority = prio;
m->mit_pattern = pat == NULL ? NULL : xstrdup(pat);
m->mit_hlg_id = hlg_id;
m->mit_match.regprog = regprog;
m->mit_match.rmm_ic = false;
m->mit_match.rmm_maxcol = 0;
m->mit_conceal_char = 0;
if (conceal_char != NULL) {
m->mit_conceal_char = utf_ptr2char(conceal_char);
}
// Set up position matches
if (pos_list != NULL) {
linenr_T toplnum = 0;
linenr_T botlnum = 0;
int i = 0;
TV_LIST_ITER(pos_list, li, {
linenr_T lnum = 0;
colnr_T col = 0;
int len = 1;
bool error = false;
if (TV_LIST_ITEM_TV(li)->v_type == VAR_LIST) {
const list_T *const subl = TV_LIST_ITEM_TV(li)->vval.v_list;
const listitem_T *subli = tv_list_first(subl);
if (subli == NULL) {
semsg(_("E5030: Empty list at position %d"),
(int)tv_list_idx_of_item(pos_list, li));
goto fail;
}
lnum = (linenr_T)tv_get_number_chk(TV_LIST_ITEM_TV(subli), &error);
if (error) {
goto fail;
}
if (lnum <= 0) {
continue;
}
m->mit_pos_array[i].lnum = lnum;
subli = TV_LIST_ITEM_NEXT(subl, subli);
if (subli != NULL) {
col = (colnr_T)tv_get_number_chk(TV_LIST_ITEM_TV(subli), &error);
if (error) {
goto fail;
}
if (col < 0) {
continue;
}
subli = TV_LIST_ITEM_NEXT(subl, subli);
if (subli != NULL) {
len = (colnr_T)tv_get_number_chk(TV_LIST_ITEM_TV(subli), &error);
if (len < 0) {
continue;
}
if (error) {
goto fail;
}
}
}
m->mit_pos_array[i].col = col;
m->mit_pos_array[i].len = len;
} else if (TV_LIST_ITEM_TV(li)->v_type == VAR_NUMBER) {
if (TV_LIST_ITEM_TV(li)->vval.v_number <= 0) {
continue;
}
m->mit_pos_array[i].lnum = (linenr_T)TV_LIST_ITEM_TV(li)->vval.v_number;
m->mit_pos_array[i].col = 0;
m->mit_pos_array[i].len = 0;
} else {
semsg(_("E5031: List or number required at position %d"),
(int)tv_list_idx_of_item(pos_list, li));
goto fail;
}
if (toplnum == 0 || lnum < toplnum) {
toplnum = lnum;
}
if (botlnum == 0 || lnum >= botlnum) {
botlnum = lnum + 1;
}
i++;
});
// Calculate top and bottom lines for redrawing area
if (toplnum != 0) {
redraw_win_range_later(wp, toplnum, botlnum);
m->mit_toplnum = toplnum;
m->mit_botlnum = botlnum;
rtype = UPD_VALID;
}
}
// Insert new match. The match list is in ascending order with regard to
// the match priorities.
matchitem_T *cur = wp->w_match_head;
matchitem_T *prev = cur;
while (cur != NULL && prio >= cur->mit_priority) {
prev = cur;
cur = cur->mit_next;
}
if (cur == prev) {
wp->w_match_head = m;
} else {
prev->mit_next = m;
}
m->mit_next = cur;
redraw_later(wp, rtype);
return id;
fail:
xfree(m->mit_pattern);
xfree(m->mit_pos_array);
xfree(m);
return -1;
}
/// Delete match with ID 'id' in the match list of window 'wp'.
///
/// @param perr print error messages if true.
static int match_delete(win_T *wp, int id, bool perr)
{
matchitem_T *cur = wp->w_match_head;
matchitem_T *prev = cur;
int rtype = UPD_SOME_VALID;
if (id < 1) {
if (perr) {
semsg(_("E802: Invalid ID: %" PRId64 " (must be greater than or equal to 1)"),
(int64_t)id);
}
return -1;
}
while (cur != NULL && cur->mit_id != id) {
prev = cur;
cur = cur->mit_next;
}
if (cur == NULL) {
if (perr) {
semsg(_("E803: ID not found: %" PRId64), (int64_t)id);
}
return -1;
}
if (cur == prev) {
wp->w_match_head = cur->mit_next;
} else {
prev->mit_next = cur->mit_next;
}
vim_regfree(cur->mit_match.regprog);
xfree(cur->mit_pattern);
if (cur->mit_toplnum != 0) {
redraw_win_range_later(wp, cur->mit_toplnum, cur->mit_botlnum);
rtype = UPD_VALID;
}
xfree(cur->mit_pos_array);
xfree(cur);
redraw_later(wp, rtype);
return 0;
}
/// Delete all matches in the match list of window 'wp'.
void clear_matches(win_T *wp)
{
while (wp->w_match_head != NULL) {
matchitem_T *m = wp->w_match_head->mit_next;
vim_regfree(wp->w_match_head->mit_match.regprog);
xfree(wp->w_match_head->mit_pattern);
xfree(wp->w_match_head->mit_pos_array);
xfree(wp->w_match_head);
wp->w_match_head = m;
}
redraw_later(wp, UPD_SOME_VALID);
}
/// Get match from ID 'id' in window 'wp'.
/// Return NULL if match not found.
static matchitem_T *get_match(win_T *wp, int id)
{
matchitem_T *cur = wp->w_match_head;
while (cur != NULL && cur->mit_id != id) {
cur = cur->mit_next;
}
return cur;
}
/// Init for calling prepare_search_hl().
void init_search_hl(win_T *wp, match_T *search_hl)
FUNC_ATTR_NONNULL_ALL
{
// Setup for match and 'hlsearch' highlighting. Disable any previous
// match
matchitem_T *cur = wp->w_match_head;
while (cur != NULL) {
cur->mit_hl.rm = cur->mit_match;
if (cur->mit_hlg_id == 0) {
cur->mit_hl.attr = 0;
} else {
cur->mit_hl.attr = syn_id2attr(cur->mit_hlg_id);
}
cur->mit_hl.buf = wp->w_buffer;
cur->mit_hl.lnum = 0;
cur->mit_hl.first_lnum = 0;
// Set the time limit to 'redrawtime'.
cur->mit_hl.tm = profile_setlimit(p_rdt);
cur = cur->mit_next;
}
search_hl->buf = wp->w_buffer;
search_hl->lnum = 0;
search_hl->first_lnum = 0;
search_hl->attr = win_hl_attr(wp, HLF_L);
// time limit is set at the toplevel, for all windows
}
/// @param shl points to a match. Fill on match.
/// @param posmatch match item with positions
/// @param mincol minimal column for a match
///
/// @return one on match, otherwise return zero.
static int next_search_hl_pos(match_T *shl, linenr_T lnum, matchitem_T *match, colnr_T mincol)
FUNC_ATTR_NONNULL_ALL
{
int found = -1;
shl->lnum = 0;
for (int i = match->mit_pos_cur; i < match->mit_pos_count; i++) {
llpos_T *pos = &match->mit_pos_array[i];
if (pos->lnum == 0) {
break;
}
if (pos->len == 0 && pos->col < mincol) {
continue;
}
if (pos->lnum == lnum) {
if (found >= 0) {
// if this match comes before the one at "found" then swap them
if (pos->col < match->mit_pos_array[found].col) {
llpos_T tmp = *pos;
*pos = match->mit_pos_array[found];
match->mit_pos_array[found] = tmp;
}
} else {
found = i;
}
}
}
match->mit_pos_cur = 0;
if (found >= 0) {
colnr_T start = match->mit_pos_array[found].col == 0
? 0 : match->mit_pos_array[found].col - 1;
colnr_T end = match->mit_pos_array[found].col == 0
? MAXCOL : start + match->mit_pos_array[found].len;
shl->lnum = lnum;
shl->rm.startpos[0].lnum = 0;
shl->rm.startpos[0].col = start;
shl->rm.endpos[0].lnum = 0;
shl->rm.endpos[0].col = end;
shl->is_addpos = true;
shl->has_cursor = false;
match->mit_pos_cur = found + 1;
return 1;
}
return 0;
}
/// Search for a next 'hlsearch' or match.
/// Uses shl->buf.
/// Sets shl->lnum and shl->rm contents.
/// Note: Assumes a previous match is always before "lnum", unless
/// shl->lnum is zero.
/// Careful: Any pointers for buffer lines will become invalid.
///
/// @param shl points to search_hl or a match
/// @param mincol minimal column for a match
/// @param cur to retrieve match positions if any
static void next_search_hl(win_T *win, match_T *search_hl, match_T *shl, linenr_T lnum,
colnr_T mincol, matchitem_T *cur)
FUNC_ATTR_NONNULL_ARG(2)
{
colnr_T matchcol;
int nmatched = 0;
const int called_emsg_before = called_emsg;
// for :{range}s/pat only highlight inside the range
if ((lnum < search_first_line || lnum > search_last_line) && cur == NULL) {
shl->lnum = 0;
return;
}
if (shl->lnum != 0) {
// Check for three situations:
// 1. If the "lnum" is below a previous match, start a new search.
// 2. If the previous match includes "mincol", use it.
// 3. Continue after the previous match.
linenr_T l = shl->lnum + shl->rm.endpos[0].lnum - shl->rm.startpos[0].lnum;
if (lnum > l) {
shl->lnum = 0;
} else if (lnum < l || shl->rm.endpos[0].col > mincol) {
return;
}
}
// Repeat searching for a match until one is found that includes "mincol"
// or none is found in this line.
while (true) {
// Stop searching after passing the time limit.
if (profile_passed_limit(shl->tm)) {
shl->lnum = 0; // no match found in time
break;
}
// Three situations:
// 1. No useful previous match: search from start of line.
// 2. Not Vi compatible or empty match: continue at next character.
// Break the loop if this is beyond the end of the line.
// 3. Vi compatible searching: continue at end of previous match.
if (shl->lnum == 0) {
matchcol = 0;
} else if (vim_strchr(p_cpo, CPO_SEARCH) == NULL
|| (shl->rm.endpos[0].lnum == 0
&& shl->rm.endpos[0].col <= shl->rm.startpos[0].col)) {
matchcol = shl->rm.startpos[0].col;
char *ml = ml_get_buf(shl->buf, lnum) + matchcol;
if (*ml == NUL) {
matchcol++;
shl->lnum = 0;
break;
}
matchcol += utfc_ptr2len(ml);
} else {
matchcol = shl->rm.endpos[0].col;
}
shl->lnum = lnum;
if (shl->rm.regprog != NULL) {
// Remember whether shl->rm is using a copy of the regprog in
// cur->mit_match.
bool regprog_is_copy = (shl != search_hl && cur != NULL
&& shl == &cur->mit_hl
&& cur->mit_match.regprog == cur->mit_hl.rm.regprog);
int timed_out = false;
nmatched = vim_regexec_multi(&shl->rm, win, shl->buf, lnum, matchcol,
&(shl->tm), &timed_out);
// Copy the regprog, in case it got freed and recompiled.
if (regprog_is_copy) {
cur->mit_match.regprog = cur->mit_hl.rm.regprog;
}
if (called_emsg > called_emsg_before || got_int || timed_out) {
// Error while handling regexp: stop using this regexp.
if (shl == search_hl) {
// don't free regprog in the match list, it's a copy
vim_regfree(shl->rm.regprog);
set_no_hlsearch(true);
}
shl->rm.regprog = NULL;
shl->lnum = 0;
got_int = false; // avoid the "Type :quit to exit Vim" message
break;
}
} else if (cur != NULL) {
nmatched = next_search_hl_pos(shl, lnum, cur, matchcol);
}
if (nmatched == 0) {
shl->lnum = 0; // no match found
break;
}
if (shl->rm.startpos[0].lnum > 0
|| shl->rm.startpos[0].col >= mincol
|| nmatched > 1
|| shl->rm.endpos[0].col > mincol) {
shl->lnum += shl->rm.startpos[0].lnum;
break; // useful match found
}
}
}
/// Advance to the match in window "wp" line "lnum" or past it.
void prepare_search_hl(win_T *wp, match_T *search_hl, linenr_T lnum)
FUNC_ATTR_NONNULL_ALL
{
matchitem_T *cur = wp->w_match_head; // points to the match list
match_T *shl; // points to search_hl or a match
bool shl_flag = false; // flag to indicate whether search_hl has been processed or not
// When using a multi-line pattern, start searching at the top
// of the window or just after a closed fold.
// Do this both for search_hl and the match list.
while (cur != NULL || shl_flag == false) {
if (shl_flag == false) {
shl = search_hl;
shl_flag = true;
} else {
shl = &cur->mit_hl;
}
if (shl->rm.regprog != NULL
&& shl->lnum == 0
&& re_multiline(shl->rm.regprog)) {
if (shl->first_lnum == 0) {
for (shl->first_lnum = lnum;
shl->first_lnum > wp->w_topline;
shl->first_lnum--) {
if (hasFolding(wp, shl->first_lnum - 1, NULL, NULL)) {
break;
}
}
}
if (cur != NULL) {
cur->mit_pos_cur = 0;
}
bool pos_inprogress = true; // mark that a position match search is
// in progress
int n = 0;
while (shl->first_lnum < lnum && (shl->rm.regprog != NULL
|| (cur != NULL && pos_inprogress))) {
next_search_hl(wp, search_hl, shl, shl->first_lnum, (colnr_T)n,
shl == search_hl ? NULL : cur);
pos_inprogress = !(cur == NULL || cur->mit_pos_cur == 0);
if (shl->lnum != 0) {
shl->first_lnum = shl->lnum
+ shl->rm.endpos[0].lnum
- shl->rm.startpos[0].lnum;
n = shl->rm.endpos[0].col;
} else {
shl->first_lnum++;
n = 0;
}
}
}
if (shl != search_hl && cur != NULL) {
cur = cur->mit_next;
}
}
}
/// Update "shl->has_cursor" based on the match in "shl" and the cursor
/// position.
static void check_cur_search_hl(win_T *wp, match_T *shl)
{
linenr_T linecount = shl->rm.endpos[0].lnum - shl->rm.startpos[0].lnum;
if (wp->w_cursor.lnum >= shl->lnum
&& wp->w_cursor.lnum <= shl->lnum + linecount
&& (wp->w_cursor.lnum > shl->lnum || wp->w_cursor.col >= shl->rm.startpos[0].col)
&& (wp->w_cursor.lnum < shl->lnum + linecount || wp->w_cursor.col < shl->rm.endpos[0].col)) {
shl->has_cursor = true;
} else {
shl->has_cursor = false;
}
}
/// Prepare for 'hlsearch' and match highlighting in one window line.
///
/// @return true if there is such highlighting and set "search_attr" to the
/// current highlight attribute.
bool prepare_search_hl_line(win_T *wp, linenr_T lnum, colnr_T mincol, char **line,
match_T *search_hl, int *search_attr, bool *search_attr_from_match)
{
matchitem_T *cur = wp->w_match_head; // points to the match list
match_T *shl; // points to search_hl or a match
bool shl_flag = false; // flag to indicate whether search_hl
// has been processed or not
bool area_highlighting = false;
// Handle highlighting the last used search pattern and matches.
// Do this for both search_hl and the match list.
while (cur != NULL || !shl_flag) {
if (!shl_flag) {
shl = search_hl;
shl_flag = true;
} else {
shl = &cur->mit_hl;
}
shl->startcol = MAXCOL;
shl->endcol = MAXCOL;
shl->attr_cur = 0;
shl->is_addpos = false;
shl->has_cursor = false;
if (cur != NULL) {
cur->mit_pos_cur = 0;
}
next_search_hl(wp, search_hl, shl, lnum, mincol,
shl == search_hl ? NULL : cur);
// Need to get the line again, a multi-line regexp may have made it
// invalid.
*line = ml_get_buf(wp->w_buffer, lnum);
if (shl->lnum != 0 && shl->lnum <= lnum) {
if (shl->lnum == lnum) {
shl->startcol = shl->rm.startpos[0].col;
} else {
shl->startcol = 0;
}
if (lnum == shl->lnum + shl->rm.endpos[0].lnum
- shl->rm.startpos[0].lnum) {
shl->endcol = shl->rm.endpos[0].col;
} else {
shl->endcol = MAXCOL;
}
// check if the cursor is in the match before changing the columns
if (shl == search_hl) {
check_cur_search_hl(wp, shl);
}
// Highlight one character for an empty match.
if (shl->startcol == shl->endcol) {
if ((*line)[shl->endcol] != NUL) {
shl->endcol += utfc_ptr2len(*line + shl->endcol);
} else {
shl->endcol++;
}
}
if (shl->startcol < mincol) { // match at leftcol
shl->attr_cur = shl->attr;
*search_attr = shl->attr;
*search_attr_from_match = shl != search_hl;
}
area_highlighting = true;
}
if (shl != search_hl && cur != NULL) {
cur = cur->mit_next;
}
}
return area_highlighting;
}
/// For a position in a line: 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.
/// Watch out for matching an empty string!
/// "on_last_col" is set to true with non-zero search_attr and the next column
/// is endcol.
/// Return the updated search_attr.
int update_search_hl(win_T *wp, linenr_T lnum, colnr_T col, char **line, match_T *search_hl,
int *has_match_conc, int *match_conc, bool lcs_eol_todo, bool *on_last_col,
bool *search_attr_from_match)
{
matchitem_T *cur = wp->w_match_head; // points to the match list
match_T *shl; // points to search_hl or a match
bool shl_flag = false; // flag to indicate whether search_hl
// has been processed or not
int search_attr = 0;
// Do this for 'search_hl' and the match list (ordered by priority).
while (cur != NULL || !shl_flag) {
if (!shl_flag
&& (cur == NULL || cur->mit_priority > SEARCH_HL_PRIORITY)) {
shl = search_hl;
shl_flag = true;
} else {
shl = &cur->mit_hl;
}
if (cur != NULL) {
cur->mit_pos_cur = 0;
}
bool pos_inprogress = true; // mark that a position match search is
// in progress
while (shl->rm.regprog != NULL
|| (cur != NULL && pos_inprogress)) {
if (shl->startcol != MAXCOL
&& col >= shl->startcol
&& col < shl->endcol) {
int next_col = col + utfc_ptr2len(*line + col);
if (shl->endcol < next_col) {
shl->endcol = next_col;
}
// Highlight the match were the cursor is using the CurSearch
// group.
if (shl == search_hl && shl->has_cursor) {
shl->attr_cur = win_hl_attr(wp, HLF_LC);
if (shl->attr_cur != shl->attr) {
search_hl_has_cursor_lnum = lnum;
}
} else {
shl->attr_cur = shl->attr;
}
// Match with the "Conceal" group results in hiding
// the match.
if (cur != NULL
&& shl != search_hl
&& syn_name2id("Conceal") == cur->mit_hlg_id) {
*has_match_conc = col == shl->startcol ? 2 : 1;
*match_conc = cur->mit_conceal_char;
} else {
*has_match_conc = 0;
}
} else if (col == shl->endcol) {
shl->attr_cur = 0;
next_search_hl(wp, search_hl, shl, lnum, col,
shl == search_hl ? NULL : cur);
pos_inprogress = !(cur == NULL || cur->mit_pos_cur == 0);
// Need to get the line again, a multi-line regexp
// may have made it invalid.
*line = ml_get_buf(wp->w_buffer, lnum);
if (shl->lnum == lnum) {
shl->startcol = shl->rm.startpos[0].col;
if (shl->rm.endpos[0].lnum == 0) {
shl->endcol = shl->rm.endpos[0].col;
} else {
shl->endcol = MAXCOL;
}
// check if the cursor is in the match
if (shl == search_hl) {
check_cur_search_hl(wp, shl);
}
if (shl->startcol == shl->endcol) {
// highlight empty match, try again after it
char *p = *line + shl->endcol;
if (*p == NUL) {
shl->endcol++;
} else {
shl->endcol += utfc_ptr2len(p);
}
}
// Loop to check if the match starts at the
// current position
continue;
}
}
break;
}
if (shl != search_hl && cur != NULL) {
cur = cur->mit_next;
}
}
// Use attributes from match with highest priority among 'search_hl' and
// the match list.
*search_attr_from_match = false;
search_attr = search_hl->attr_cur;
cur = wp->w_match_head;
shl_flag = false;
while (cur != NULL || !shl_flag) {
if (!shl_flag
&& (cur == NULL || cur->mit_priority > SEARCH_HL_PRIORITY)) {
shl = search_hl;
shl_flag = true;
} else {
shl = &cur->mit_hl;
}
if (shl->attr_cur != 0) {
search_attr = shl->attr_cur;
*on_last_col = col + 1 >= shl->endcol;
*search_attr_from_match = shl != search_hl;
}
if (shl != search_hl && cur != NULL) {
cur = cur->mit_next;
}
}
// Only highlight one character after the last column.
if (*(*line + col) == NUL && (wp->w_p_list && !lcs_eol_todo)) {
search_attr = 0;
}
return search_attr;
}
bool get_prevcol_hl_flag(win_T *wp, match_T *search_hl, colnr_T curcol)
{
colnr_T prevcol = curcol;
// we're not really at that column when skipping some text
if ((wp->w_p_wrap ? wp->w_skipcol : wp->w_leftcol) > prevcol) {
prevcol++;
}
// Highlight a character after the end of the line if the match started
// at the end of the line or when the match continues in the next line
// (match includes the line break).
if (!search_hl->is_addpos && (prevcol == search_hl->startcol
|| (prevcol > search_hl->startcol
&& search_hl->endcol == MAXCOL))) {
return true;
}
matchitem_T *cur = wp->w_match_head; // points to the match list
while (cur != NULL) {
if (!cur->mit_hl.is_addpos && (prevcol == cur->mit_hl.startcol
|| (prevcol > cur->mit_hl.startcol
&& cur->mit_hl.endcol == MAXCOL))) {
return true;
}
cur = cur->mit_next;
}
return false;
}
/// Get highlighting for the char after the text in "char_attr" from 'hlsearch'
/// or match highlighting.
void get_search_match_hl(win_T *wp, match_T *search_hl, colnr_T col, int *char_attr)
{
matchitem_T *cur = wp->w_match_head; // points to the match list
match_T *shl; // points to search_hl or a match
bool shl_flag = false; // flag to indicate whether search_hl
// has been processed or not
while (cur != NULL || !shl_flag) {
if (!shl_flag
&& (cur == NULL || cur->mit_priority > SEARCH_HL_PRIORITY)) {
shl = search_hl;
shl_flag = true;
} else {
shl = &cur->mit_hl;
}
if (col - 1 == shl->startcol
&& (shl == search_hl || !shl->is_addpos)) {
*char_attr = shl->attr;
}
if (shl != search_hl && cur != NULL) {
cur = cur->mit_next;
}
}
}
static int matchadd_dict_arg(typval_T *tv, const char **conceal_char, win_T **win)
{
dictitem_T *di;
if (tv->v_type != VAR_DICT) {
emsg(_(e_dictreq));
return FAIL;
}
if ((di = tv_dict_find(tv->vval.v_dict, S_LEN("conceal"))) != NULL) {
*conceal_char = tv_get_string(&di->di_tv);
}
if ((di = tv_dict_find(tv->vval.v_dict, S_LEN("window"))) == NULL) {
return OK;
}
*win = find_win_by_nr_or_id(&di->di_tv);
if (*win == NULL) {
emsg(_(e_invalwindow));
return FAIL;
}
return OK;
}
/// "clearmatches()" function
void f_clearmatches(typval_T *argvars, typval_T *rettv, EvalFuncData fptr)
{
win_T *win = get_optional_window(argvars, 0);
if (win != NULL) {
clear_matches(win);
}
}
/// "getmatches()" function
void f_getmatches(typval_T *argvars, typval_T *rettv, EvalFuncData fptr)
{
win_T *win = get_optional_window(argvars, 0);
tv_list_alloc_ret(rettv, kListLenMayKnow);
if (win == NULL) {
return;
}
matchitem_T *cur = win->w_match_head;
while (cur != NULL) {
dict_T *dict = tv_dict_alloc();
if (cur->mit_match.regprog == NULL) {
// match added with matchaddpos()
for (int i = 0; i < cur->mit_pos_count; i++) {
llpos_T *llpos;
char buf[30]; // use 30 to avoid compiler warning
llpos = &cur->mit_pos_array[i];
if (llpos->lnum == 0) {
break;
}
list_T *const l = tv_list_alloc(1 + (llpos->col > 0 ? 2 : 0));
tv_list_append_number(l, (varnumber_T)llpos->lnum);
if (llpos->col > 0) {
tv_list_append_number(l, (varnumber_T)llpos->col);
tv_list_append_number(l, (varnumber_T)llpos->len);
}
int len = snprintf(buf, sizeof(buf), "pos%d", i + 1);
assert((size_t)len < sizeof(buf));
tv_dict_add_list(dict, buf, (size_t)len, l);
}
} else {
tv_dict_add_str(dict, S_LEN("pattern"), cur->mit_pattern);
}
tv_dict_add_str(dict, S_LEN("group"), syn_id2name(cur->mit_hlg_id));
tv_dict_add_nr(dict, S_LEN("priority"), (varnumber_T)cur->mit_priority);
tv_dict_add_nr(dict, S_LEN("id"), (varnumber_T)cur->mit_id);
if (cur->mit_conceal_char) {
char buf[MB_MAXCHAR + 1];
buf[utf_char2bytes(cur->mit_conceal_char, buf)] = NUL;
tv_dict_add_str(dict, S_LEN("conceal"), buf);
}
tv_list_append_dict(rettv->vval.v_list, dict);
cur = cur->mit_next;
}
}
/// "setmatches()" function
void f_setmatches(typval_T *argvars, typval_T *rettv, EvalFuncData fptr)
{
dict_T *d;
list_T *s = NULL;
win_T *win = get_optional_window(argvars, 1);
rettv->vval.v_number = -1;
if (argvars[0].v_type != VAR_LIST) {
emsg(_(e_listreq));
return;
}
if (win == NULL) {
return;
}
list_T *const l = argvars[0].vval.v_list;
// To some extent make sure that we are dealing with a list from
// "getmatches()".
int li_idx = 0;
TV_LIST_ITER_CONST(l, li, {
if (TV_LIST_ITEM_TV(li)->v_type != VAR_DICT
|| (d = TV_LIST_ITEM_TV(li)->vval.v_dict) == NULL) {
semsg(_("E474: List item %d is either not a dictionary "
"or an empty one"), li_idx);
return;
}
if (!(tv_dict_find(d, S_LEN("group")) != NULL
&& (tv_dict_find(d, S_LEN("pattern")) != NULL
|| tv_dict_find(d, S_LEN("pos1")) != NULL)
&& tv_dict_find(d, S_LEN("priority")) != NULL
&& tv_dict_find(d, S_LEN("id")) != NULL)) {
semsg(_("E474: List item %d is missing one of the required keys"),
li_idx);
return;
}
li_idx++;
});
clear_matches(win);
bool match_add_failed = false;
TV_LIST_ITER_CONST(l, li, {
int i = 0;
d = TV_LIST_ITEM_TV(li)->vval.v_dict;
dictitem_T *const di = tv_dict_find(d, S_LEN("pattern"));
if (di == NULL) {
if (s == NULL) {
s = tv_list_alloc(9);
}
// match from matchaddpos()
for (i = 1; i < 9; i++) {
char buf[30]; // use 30 to avoid compiler warning
snprintf(buf, sizeof(buf), "pos%d", i);
dictitem_T *const pos_di = tv_dict_find(d, buf, -1);
if (pos_di != NULL) {
if (pos_di->di_tv.v_type != VAR_LIST) {
return;
}
tv_list_append_tv(s, &pos_di->di_tv);
tv_list_ref(s);
} else {
break;
}
}
}
// Note: there are three number buffers involved:
// - group_buf below.
// - numbuf in tv_dict_get_string().
// - mybuf in tv_get_string().
//
// If you change this code make sure that buffers will not get
// accidentally reused.
char group_buf[NUMBUFLEN];
const char *const group = tv_dict_get_string_buf(d, "group", group_buf);
const int priority = (int)tv_dict_get_number(d, "priority");
const int id = (int)tv_dict_get_number(d, "id");
dictitem_T *const conceal_di = tv_dict_find(d, S_LEN("conceal"));
const char *const conceal = (conceal_di != NULL
? tv_get_string(&conceal_di->di_tv)
: NULL);
if (i == 0) {
if (match_add(win, group,
tv_dict_get_string(d, "pattern", false),
priority, id, NULL, conceal) != id) {
match_add_failed = true;
}
} else {
if (match_add(win, group, NULL, priority, id, s, conceal) != id) {
match_add_failed = true;
}
tv_list_unref(s);
s = NULL;
}
});
if (!match_add_failed) {
rettv->vval.v_number = 0;
}
}
/// "matchadd()" function
void f_matchadd(typval_T *argvars, typval_T *rettv, EvalFuncData fptr)
{
char grpbuf[NUMBUFLEN];
char patbuf[NUMBUFLEN];
// group
const char *const grp = tv_get_string_buf_chk(&argvars[0], grpbuf);
// pattern
const char *const pat = tv_get_string_buf_chk(&argvars[1], patbuf);
// default priority
int prio = 10;
int id = -1;
bool error = false;
const char *conceal_char = NULL;
win_T *win = curwin;
rettv->vval.v_number = -1;
if (grp == NULL || pat == NULL) {
return;
}
if (argvars[2].v_type != VAR_UNKNOWN) {
prio = (int)tv_get_number_chk(&argvars[2], &error);
if (argvars[3].v_type != VAR_UNKNOWN) {
id = (int)tv_get_number_chk(&argvars[3], &error);
if (argvars[4].v_type != VAR_UNKNOWN
&& matchadd_dict_arg(&argvars[4], &conceal_char, &win) == FAIL) {
return;
}
}
}
if (error) {
return;
}
if (id >= 1 && id <= 3) {
semsg(_("E798: ID is reserved for \":match\": %" PRId64), (int64_t)id);
return;
}
rettv->vval.v_number = match_add(win, grp, pat, prio, id, NULL, conceal_char);
}
/// "matchaddpo()" function
void f_matchaddpos(typval_T *argvars, typval_T *rettv, EvalFuncData fptr)
{
rettv->vval.v_number = -1;
char buf[NUMBUFLEN];
const char *const group = tv_get_string_buf_chk(&argvars[0], buf);
if (group == NULL) {
return;
}
if (argvars[1].v_type != VAR_LIST) {
semsg(_(e_listarg), "matchaddpos()");
return;
}
list_T *l;
l = argvars[1].vval.v_list;
if (tv_list_len(l) == 0) {
return;
}
bool error = false;
int prio = 10;
int id = -1;
const char *conceal_char = NULL;
win_T *win = curwin;
if (argvars[2].v_type != VAR_UNKNOWN) {
prio = (int)tv_get_number_chk(&argvars[2], &error);
if (argvars[3].v_type != VAR_UNKNOWN) {
id = (int)tv_get_number_chk(&argvars[3], &error);
if (argvars[4].v_type != VAR_UNKNOWN
&& matchadd_dict_arg(&argvars[4], &conceal_char, &win) == FAIL) {
return;
}
}
}
if (error == true) {
return;
}
// id == 3 is ok because matchaddpos() is supposed to substitute :3match
if (id == 1 || id == 2) {
semsg(_("E798: ID is reserved for \"match\": %" PRId64), (int64_t)id);
return;
}
rettv->vval.v_number = match_add(win, group, NULL, prio, id, l, conceal_char);
}
/// "matcharg()" function
void f_matcharg(typval_T *argvars, typval_T *rettv, EvalFuncData fptr)
{
const int id = (int)tv_get_number(&argvars[0]);
tv_list_alloc_ret(rettv, (id >= 1 && id <= 3
? 2
: 0));
if (id >= 1 && id <= 3) {
matchitem_T *const m = get_match(curwin, id);
if (m != NULL) {
tv_list_append_string(rettv->vval.v_list, syn_id2name(m->mit_hlg_id), -1);
tv_list_append_string(rettv->vval.v_list, m->mit_pattern, -1);
} else {
tv_list_append_string(rettv->vval.v_list, NULL, 0);
tv_list_append_string(rettv->vval.v_list, NULL, 0);
}
}
}
/// "matchdelete()" function
void f_matchdelete(typval_T *argvars, typval_T *rettv, EvalFuncData fptr)
{
win_T *win = get_optional_window(argvars, 1);
if (win == NULL) {
rettv->vval.v_number = -1;
} else {
rettv->vval.v_number = match_delete(win,
(int)tv_get_number(&argvars[0]), true);
}
}
/// ":[N]match {group} {pattern}"
/// Sets nextcmd to the start of the next command, if any. Also called when
/// skipping commands to find the next command.
void ex_match(exarg_T *eap)
{
char *g = NULL;
char *end;
int id;
if (eap->line2 <= 3) {
id = (int)eap->line2;
} else {
emsg(e_invcmd);
return;
}
// First clear any old pattern.
if (!eap->skip) {
match_delete(curwin, id, false);
}
if (ends_excmd(*eap->arg)) {
end = eap->arg;
} else if ((STRNICMP(eap->arg, "none", 4) == 0
&& (ascii_iswhite(eap->arg[4]) || ends_excmd(eap->arg[4])))) {
end = eap->arg + 4;
} else {
char *p = skiptowhite(eap->arg);
if (!eap->skip) {
g = xmemdupz(eap->arg, (size_t)(p - eap->arg));
}
p = skipwhite(p);
if (*p == NUL) {
// There must be two arguments.
xfree(g);
semsg(_(e_invarg2), eap->arg);
return;
}
end = skip_regexp(p + 1, *p, true);
if (!eap->skip) {
if (*end != NUL && !ends_excmd(*skipwhite(end + 1))) {
xfree(g);
eap->errmsg = ex_errmsg(e_trailing_arg, end);
return;
}
if (*end != *p) {
xfree(g);
semsg(_(e_invarg2), p);
return;
}
int c = (uint8_t)(*end);
*end = NUL;
match_add(curwin, g, p + 1, 10, id, NULL, NULL);
xfree(g);
*end = (char)c;
}
}
eap->nextcmd = find_nextcmd(end);
}
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