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neovim/src/nvim/indent.c
Jan Edmund Lazo 96e9041a78 vim-patch:partial:8.1.1939: code for handling v: variables in generic eval file (#35968) 
Problem:    Code for handling v: variables in generic eval file.
Solution:   Move v: variables to evalvars.c. (Yegappan Lakshmanan,
            closes vim/vim#4872)

e5cdf153bc

Remove direct reference to "vimvars" for following functions:
- assert_error()
- get_vim_var_nr()
- get_vim_var_list()
- get_vim_var_dict()
- get_vim_var_str()
- set_cmdarg()
- set_reg_var()
- set_vcount()
- set_vexception()
- set_vthrowpoint()
- set_vim_var_bool()
- set_vim_var_dict()
- set_vim_var_list()
- set_vim_var_nr()
- set_vim_var_special()
- set_vim_var_string()
- set_vim_var_type()

Reorder functions based on v8.2.4930 for
eval_one_expr_in_str() and eval_all_expr_in_str().

Co-authored-by: Bram Moolenaar <Bram@vim.org>
2025-10-04 04:28:30 +00:00

1973 lines
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#include <assert.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include "nvim/ascii_defs.h"
#include "nvim/assert_defs.h"
#include "nvim/buffer.h"
#include "nvim/buffer_defs.h"
#include "nvim/change.h"
#include "nvim/charset.h"
#include "nvim/cursor.h"
#include "nvim/drawscreen.h"
#include "nvim/edit.h"
#include "nvim/errors.h"
#include "nvim/eval.h"
#include "nvim/eval/typval.h"
#include "nvim/eval/typval_defs.h"
#include "nvim/eval/vars.h"
#include "nvim/ex_cmds_defs.h"
#include "nvim/ex_docmd.h"
#include "nvim/extmark.h"
#include "nvim/extmark_defs.h"
#include "nvim/gettext_defs.h"
#include "nvim/globals.h"
#include "nvim/indent.h"
#include "nvim/indent_c.h"
#include "nvim/mark_defs.h"
#include "nvim/mbyte.h"
#include "nvim/mbyte_defs.h"
#include "nvim/memline.h"
#include "nvim/memory.h"
#include "nvim/message.h"
#include "nvim/move.h"
#include "nvim/ops.h"
#include "nvim/option.h"
#include "nvim/option_defs.h"
#include "nvim/option_vars.h"
#include "nvim/os/input.h"
#include "nvim/plines.h"
#include "nvim/pos_defs.h"
#include "nvim/regexp.h"
#include "nvim/regexp_defs.h"
#include "nvim/search.h"
#include "nvim/state_defs.h"
#include "nvim/strings.h"
#include "nvim/textformat.h"
#include "nvim/types_defs.h"
#include "nvim/undo.h"
#include "nvim/vim_defs.h"
#include "indent.c.generated.h"
/// Set the integer values corresponding to the string setting of 'vartabstop'.
/// "array" will be set, caller must free it if needed.
///
/// @return false for an error.
bool tabstop_set(char *var, colnr_T **array)
{
int valcount = 1;
if (var[0] == NUL || (var[0] == '0' && var[1] == NUL)) {
*array = NULL;
return true;
}
for (char *cp = var; *cp != NUL; cp++) {
if (cp == var || cp[-1] == ',') {
char *end;
if (strtol(cp, &end, 10) <= 0) {
if (cp != end) {
emsg(_(e_positive));
} else {
semsg(_(e_invarg2), cp);
}
return false;
}
}
if (ascii_isdigit(*cp)) {
continue;
}
if (cp[0] == ',' && cp > var && cp[-1] != ',' && cp[1] != NUL) {
valcount++;
continue;
}
semsg(_(e_invarg2), var);
return false;
}
*array = (colnr_T *)xmalloc((unsigned)(valcount + 1) * sizeof(int));
(*array)[0] = (colnr_T)valcount;
int t = 1;
for (char *cp = var; *cp != NUL;) {
int n = atoi(cp);
// Catch negative values, overflow and ridiculous big values.
if (n <= 0 || n > TABSTOP_MAX) {
semsg(_(e_invarg2), cp);
XFREE_CLEAR(*array);
return false;
}
(*array)[t++] = n;
while (*cp != NUL && *cp != ',') {
cp++;
}
if (*cp != NUL) {
cp++;
}
}
return true;
}
/// Calculate the number of screen spaces a tab will occupy.
/// If "vts" is set then the tab widths are taken from that array,
/// otherwise the value of ts is used.
int tabstop_padding(colnr_T col, OptInt ts_arg, const colnr_T *vts)
FUNC_ATTR_PURE
{
OptInt ts = ts_arg == 0 ? 8 : ts_arg;
colnr_T tabcol = 0;
int t;
int padding = 0;
if (vts == NULL || vts[0] == 0) {
return (int)(ts - (col % ts));
}
const int tabcount = vts[0];
for (t = 1; t <= tabcount; t++) {
tabcol += vts[t];
if (tabcol > col) {
padding = tabcol - col;
break;
}
}
if (t > tabcount) {
padding = vts[tabcount] - ((col - tabcol) % vts[tabcount]);
}
return padding;
}
/// Find the size of the tab that covers a particular column.
///
/// If this is being called as part of a shift operation, col is not the cursor
/// column but is the column number to the left of the first non-whitespace
/// character in the line. If the shift is to the left (left == true), then
/// return the size of the tab interval to the left of the column.
int tabstop_at(colnr_T col, OptInt ts, const colnr_T *vts, bool left)
{
if (vts == NULL || vts[0] == 0) {
return (int)ts;
}
colnr_T tabcol = 0; // Column of the tab stop under consideration.
int t; // Tabstop index in the list of variable tab stops.
int tab_size = 0; // Size of the tab stop interval to the right or left of the col.
const int tabcount // Number of tab stops in the list of variable tab stops.
= vts[0];
for (t = 1; t <= tabcount; t++) {
tabcol += vts[t];
if (tabcol > col) {
// If shifting left (left == true), and if the column to the left of
// the first first non-blank character (col) in the line is
// already to the left of the first tabstop, set the shift amount
// (tab_size) to just enough to shift the line to the left margin.
// The value doesn't seem to matter as long as it is at least that
// distance.
if (left && (t == 1)) {
tab_size = col;
} else {
tab_size = vts[t - (left ? 1 : 0)];
}
break;
}
}
if (t > tabcount) { // If the value of the index t is beyond the
// end of the list, use the tab stop value at
// the end of the list.
tab_size = vts[tabcount];
}
return tab_size;
}
/// Find the column on which a tab starts.
colnr_T tabstop_start(colnr_T col, int ts, colnr_T *vts)
{
colnr_T tabcol = 0;
if (vts == NULL || vts[0] == 0) {
return col - col % ts;
}
const int tabcount = vts[0];
for (int t = 1; t <= tabcount; t++) {
tabcol += vts[t];
if (tabcol > col) {
return (tabcol - vts[t]);
}
}
const int excess = (tabcol % vts[tabcount]);
return col - (col - excess) % vts[tabcount];
}
/// Find the number of tabs and spaces necessary to get from one column
/// to another.
void tabstop_fromto(colnr_T start_col, colnr_T end_col, int ts_arg, const colnr_T *vts, int *ntabs,
int *nspcs)
{
int spaces = end_col - start_col;
colnr_T tabcol = 0;
int padding = 0;
int t;
int ts = ts_arg == 0 ? (int)curbuf->b_p_ts : ts_arg;
assert(ts != 0); // suppress clang "Division by zero"
if (vts == NULL || vts[0] == 0) {
int tabs = 0;
const int initspc = (ts - (start_col % ts));
if (spaces >= initspc) {
spaces -= initspc;
tabs++;
}
tabs += (spaces / ts);
spaces -= ((spaces / ts) * ts);
*ntabs = tabs;
*nspcs = spaces;
return;
}
// Find the padding needed to reach the next tabstop.
const int tabcount = vts[0];
for (t = 1; t <= tabcount; t++) {
tabcol += vts[t];
if (tabcol > start_col) {
padding = tabcol - start_col;
break;
}
}
if (t > tabcount) {
padding = vts[tabcount] - ((start_col - tabcol) % vts[tabcount]);
}
// If the space needed is less than the padding no tabs can be used.
if (spaces < padding) {
*ntabs = 0;
*nspcs = spaces;
return;
}
*ntabs = 1;
spaces -= padding;
// At least one tab has been used. See if any more will fit.
while (spaces != 0 && ++t <= tabcount) {
padding = vts[t];
if (spaces < padding) {
*nspcs = spaces;
return;
}
*ntabs += 1;
spaces -= padding;
}
*ntabs += spaces / (int)vts[tabcount];
*nspcs = spaces % (int)vts[tabcount];
}
/// See if two tabstop arrays contain the same values.
static bool tabstop_eq(const colnr_T *ts1, const colnr_T *ts2)
{
if ((ts1 == 0 && ts2) || (ts1 && ts2 == 0)) {
return false;
}
if (ts1 == ts2) {
return true;
}
if (ts1[0] != ts2[0]) {
return false;
}
for (int t = 1; t <= ts1[0]; t++) {
if (ts1[t] != ts2[t]) {
return false;
}
}
return true;
}
/// Copy a tabstop array, allocating space for the new array.
int *tabstop_copy(const int *oldts)
{
if (oldts == 0) {
return 0;
}
int *newts = xmalloc((unsigned)(oldts[0] + 1) * sizeof(int));
for (int t = 0; t <= oldts[0]; t++) {
newts[t] = oldts[t];
}
return newts;
}
/// Return a count of the number of tabstops.
int tabstop_count(colnr_T *ts)
{
return ts != NULL ? (int)ts[0] : 0;
}
/// Return the first tabstop, or 8 if there are no tabstops defined.
int tabstop_first(colnr_T *ts)
{
return ts != NULL ? (int)ts[1] : 8;
}
/// Return the effective shiftwidth value for current buffer, using the
/// 'tabstop' value when 'shiftwidth' is zero.
int get_sw_value(buf_T *buf)
{
int result = get_sw_value_col(buf, 0, false);
return result;
}
/// Idem, using "pos".
static int get_sw_value_pos(buf_T *buf, pos_T *pos, bool left)
{
pos_T save_cursor = curwin->w_cursor;
curwin->w_cursor = *pos;
int sw_value = get_sw_value_col(buf, get_nolist_virtcol(), left);
curwin->w_cursor = save_cursor;
return sw_value;
}
/// Idem, using the first non-black in the current line.
int get_sw_value_indent(buf_T *buf, bool left)
{
pos_T pos = curwin->w_cursor;
pos.col = (colnr_T)getwhitecols_curline();
return get_sw_value_pos(buf, &pos, left);
}
/// Idem, using virtual column "col".
int get_sw_value_col(buf_T *buf, colnr_T col, bool left)
{
return buf->b_p_sw ? (int)buf->b_p_sw
: tabstop_at(col, buf->b_p_ts, buf->b_p_vts_array, left);
}
/// Return the effective softtabstop value for the current buffer,
/// using the shiftwidth value when 'softtabstop' is negative.
int get_sts_value(void)
{
int result = curbuf->b_p_sts < 0 ? get_sw_value(curbuf) : (int)curbuf->b_p_sts;
return result;
}
/// Count the size (in window cells) of the indent in the current line.
int get_indent(void)
{
return indent_size_ts(get_cursor_line_ptr(), curbuf->b_p_ts, curbuf->b_p_vts_array);
}
/// Count the size (in window cells) of the indent in line "lnum".
int get_indent_lnum(linenr_T lnum)
{
return indent_size_ts(ml_get(lnum), curbuf->b_p_ts, curbuf->b_p_vts_array);
}
/// Count the size (in window cells) of the indent in line "lnum" of buffer "buf".
int get_indent_buf(buf_T *buf, linenr_T lnum)
{
return indent_size_ts(ml_get_buf(buf, lnum), buf->b_p_ts, buf->b_p_vts_array);
}
/// Compute the size of the indent (in window cells) in line "ptr",
/// without tabstops (count tab as ^I or <09>).
int indent_size_no_ts(char const *ptr)
FUNC_ATTR_NONNULL_ALL FUNC_ATTR_PURE
{
int tab_size = byte2cells(TAB);
int vcol = 0;
while (true) {
char const c = *ptr++;
if (c == ' ') {
vcol++;
} else if (c == TAB) {
vcol += tab_size;
} else {
return vcol;
}
}
}
/// Compute the size of the indent (in window cells) in line "ptr",
/// using tabstops
int indent_size_ts(char const *ptr, OptInt ts, colnr_T *vts)
FUNC_ATTR_NONNULL_ARG(1) FUNC_ATTR_PURE
{
assert(char2cells(' ') == 1);
int vcol = 0;
int tabstop_width, next_tab_vcol;
if (vts == NULL || vts[0] < 1) { // tab has fixed width
// can ts be 0 ? This is from tabstop_padding().
tabstop_width = (int)(ts == 0 ? 8 : ts);
next_tab_vcol = tabstop_width;
} else { // tab has variable width
colnr_T *cur_tabstop = vts + 1;
colnr_T *const last_tabstop = vts + vts[0];
while (cur_tabstop != last_tabstop) {
int cur_vcol = vcol;
vcol += *cur_tabstop++;
assert(cur_vcol < vcol);
do {
char const c = *ptr++;
if (c == ' ') {
cur_vcol++;
} else if (c == TAB) {
break;
} else {
return cur_vcol;
}
} while (cur_vcol != vcol);
}
tabstop_width = *last_tabstop;
next_tab_vcol = vcol + tabstop_width;
}
assert(tabstop_width != 0);
while (true) {
char const c = *ptr++;
if (c == ' ') {
vcol++;
next_tab_vcol += (vcol == next_tab_vcol) ? tabstop_width : 0;
} else if (c == TAB) {
vcol = next_tab_vcol;
next_tab_vcol += tabstop_width;
} else {
return vcol;
}
}
}
/// Set the indent of the current line.
/// Leaves the cursor on the first non-blank in the line.
/// Caller must take care of undo.
/// "flags":
/// SIN_CHANGED: call changed_bytes() if the line was changed.
/// SIN_INSERT: insert the indent in front of the line.
/// SIN_UNDO: save line for undo before changing it.
/// SIN_NOMARK: don't move extmarks (because just after ml_append or something)
/// @param size measured in spaces
///
/// @return true if the line was changed.
bool set_indent(int size, int flags)
{
char *newline;
char *oldline;
char *s;
int doit = false;
int ind_done = 0; // Measured in spaces.
int tab_pad;
bool retval = false;
// Number of initial whitespace chars when 'et' and 'pi' are both set.
int orig_char_len = -1;
// First check if there is anything to do and compute the number of
// characters needed for the indent.
int todo = size;
int ind_len = 0; // Measured in characters.
char *p = oldline = get_cursor_line_ptr();
int line_len = get_cursor_line_len() + 1; // size of the line (including the NUL)
// Calculate the buffer size for the new indent, and check to see if it
// isn't already set.
// If 'expandtab' isn't set: use TABs; if both 'expandtab' and
// 'preserveindent' are set count the number of characters at the
// beginning of the line to be copied.
if (!curbuf->b_p_et || (!(flags & SIN_INSERT) && curbuf->b_p_pi)) {
int ind_col = 0;
// If 'preserveindent' is set then reuse as much as possible of
// the existing indent structure for the new indent.
if (!(flags & SIN_INSERT) && curbuf->b_p_pi) {
ind_done = 0;
// Count as many characters as we can use.
while (todo > 0 && ascii_iswhite(*p)) {
if (*p == TAB) {
tab_pad = tabstop_padding(ind_done,
curbuf->b_p_ts,
curbuf->b_p_vts_array);
// Stop if this tab will overshoot the target.
if (todo < tab_pad) {
break;
}
todo -= tab_pad;
ind_len++;
ind_done += tab_pad;
} else {
todo--;
ind_len++;
ind_done++;
}
p++;
}
// These diverge from this point.
ind_col = ind_done;
// Set initial number of whitespace chars to copy if we are
// preserving indent but expandtab is set.
if (curbuf->b_p_et) {
orig_char_len = ind_len;
}
// Fill to next tabstop with a tab, if possible.
tab_pad = tabstop_padding(ind_done,
curbuf->b_p_ts,
curbuf->b_p_vts_array);
if ((todo >= tab_pad) && (orig_char_len == -1)) {
doit = true;
todo -= tab_pad;
ind_len++;
// ind_done += tab_pad;
ind_col += tab_pad;
}
}
// Count tabs required for indent.
while (true) {
tab_pad = tabstop_padding(ind_col, curbuf->b_p_ts, curbuf->b_p_vts_array);
if (todo < tab_pad) {
break;
}
if (*p != TAB) {
doit = true;
} else {
p++;
}
todo -= tab_pad;
ind_len++;
ind_col += tab_pad;
}
}
// Count spaces required for indent.
while (todo > 0) {
if (*p != ' ') {
doit = true;
} else {
p++;
}
todo--;
ind_len++;
// ind_done++;
}
// Return if the indent is OK already.
if (!doit && !ascii_iswhite(*p) && !(flags & SIN_INSERT)) {
return false;
}
// Allocate memory for the new line.
if (flags & SIN_INSERT) {
p = oldline;
} else {
p = skipwhite(p);
line_len -= (int)(p - oldline);
}
// If 'preserveindent' and 'expandtab' are both set keep the original
// characters and allocate accordingly. We will fill the rest with spaces
// after the if (!curbuf->b_p_et) below.
int skipcols = 0; // number of columns (in bytes) that were presved
if (orig_char_len != -1) {
int newline_size; // = orig_char_len + size - ind_done + line_len
STRICT_ADD(orig_char_len, size, &newline_size, int);
STRICT_SUB(newline_size, ind_done, &newline_size, int);
STRICT_ADD(newline_size, line_len, &newline_size, int);
assert(newline_size >= 0);
newline = xmalloc((size_t)newline_size);
todo = size - ind_done;
// Set total length of indent in characters, which may have been
// undercounted until now.
ind_len = orig_char_len + todo;
p = oldline;
s = newline;
skipcols = orig_char_len;
while (orig_char_len > 0) {
*s++ = *p++;
orig_char_len--;
}
// Skip over any additional white space (useful when newindent is less
// than old).
while (ascii_iswhite(*p)) {
p++;
}
} else {
todo = size;
assert(ind_len + line_len >= 0);
size_t newline_size;
STRICT_ADD(ind_len, line_len, &newline_size, size_t);
newline = xmalloc(newline_size);
s = newline;
}
// Put the characters in the new line.
// if 'expandtab' isn't set: use TABs
if (!curbuf->b_p_et) {
// If 'preserveindent' is set then reuse as much as possible of
// the existing indent structure for the new indent.
if (!(flags & SIN_INSERT) && curbuf->b_p_pi) {
p = oldline;
ind_done = 0;
while (todo > 0 && ascii_iswhite(*p)) {
if (*p == TAB) {
tab_pad = tabstop_padding(ind_done,
curbuf->b_p_ts,
curbuf->b_p_vts_array);
// Stop if this tab will overshoot the target.
if (todo < tab_pad) {
break;
}
todo -= tab_pad;
ind_done += tab_pad;
} else {
todo--;
ind_done++;
}
*s++ = *p++;
skipcols++;
}
// Fill to next tabstop with a tab, if possible.
tab_pad = tabstop_padding(ind_done,
curbuf->b_p_ts,
curbuf->b_p_vts_array);
if (todo >= tab_pad) {
*s++ = TAB;
todo -= tab_pad;
ind_done += tab_pad;
}
p = skipwhite(p);
}
while (true) {
tab_pad = tabstop_padding(ind_done,
curbuf->b_p_ts,
curbuf->b_p_vts_array);
if (todo < tab_pad) {
break;
}
*s++ = TAB;
todo -= tab_pad;
ind_done += tab_pad;
}
}
while (todo > 0) {
*s++ = ' ';
todo--;
}
memmove(s, p, (size_t)line_len);
// Replace the line (unless undo fails).
if (!(flags & SIN_UNDO) || (u_savesub(curwin->w_cursor.lnum) == OK)) {
const colnr_T old_offset = (colnr_T)(p - oldline);
const colnr_T new_offset = (colnr_T)(s - newline);
// this may free "newline"
ml_replace(curwin->w_cursor.lnum, newline, false);
if (!(flags & SIN_NOMARK)) {
extmark_splice_cols(curbuf,
(int)curwin->w_cursor.lnum - 1,
skipcols,
old_offset - skipcols,
new_offset - skipcols,
kExtmarkUndo);
}
if (flags & SIN_CHANGED) {
changed_bytes(curwin->w_cursor.lnum, 0);
}
// Correct saved cursor position if it is in this line.
if (saved_cursor.lnum == curwin->w_cursor.lnum) {
if (saved_cursor.col >= old_offset) {
// Cursor was after the indent, adjust for the number of
// bytes added/removed.
saved_cursor.col += ind_len - old_offset;
} else if (saved_cursor.col >= new_offset) {
// Cursor was in the indent, and is now after it, put it back
// at the start of the indent (replacing spaces with TAB).
saved_cursor.col = new_offset;
}
}
retval = true;
} else {
xfree(newline);
}
curwin->w_cursor.col = ind_len;
return retval;
}
// Return the indent of the current line after a number. Return -1 if no
// number was found. Used for 'n' in 'formatoptions': numbered list.
// Since a pattern is used it can actually handle more than numbers.
int get_number_indent(linenr_T lnum)
{
colnr_T col;
pos_T pos;
regmatch_T regmatch;
int lead_len = 0; // Length of comment leader.
if (lnum > curbuf->b_ml.ml_line_count) {
return -1;
}
pos.lnum = 0;
// In format_lines() (i.e. not insert mode), fo+=q is needed too...
if ((State & MODE_INSERT) || has_format_option(FO_Q_COMS)) {
lead_len = get_leader_len(ml_get(lnum), NULL, false, true);
}
regmatch.regprog = vim_regcomp(curbuf->b_p_flp, RE_MAGIC);
if (regmatch.regprog != NULL) {
regmatch.rm_ic = false;
// vim_regexec() expects a pointer to a line. This lets us
// start matching for the flp beyond any comment leader...
if (vim_regexec(&regmatch, ml_get(lnum) + lead_len, 0)) {
pos.lnum = lnum;
pos.col = (colnr_T)(*regmatch.endp - ml_get(lnum));
pos.coladd = 0;
}
vim_regfree(regmatch.regprog);
}
if ((pos.lnum == 0) || (*ml_get_pos(&pos) == NUL)) {
return -1;
}
getvcol(curwin, &pos, &col, NULL, NULL);
return (int)col;
}
/// Check "briopt" as 'breakindentopt' and update the members of "wp".
/// This is called when 'breakindentopt' is changed and when a window is
/// initialized
///
/// @param briopt when NULL: use "wp->w_p_briopt"
/// @param wp when NULL: only check "briopt"
///
/// @return FAIL for failure, OK otherwise.
bool briopt_check(char *briopt, win_T *wp)
{
int bri_shift = 0;
int bri_min = 20;
bool bri_sbr = false;
int bri_list = 0;
int bri_vcol = 0;
char *p = empty_string_option;
if (briopt != NULL) {
p = briopt;
} else if (wp != NULL) {
p = wp->w_p_briopt;
}
while (*p != NUL) {
// Note: Keep this in sync with opt_briopt_values.
if (strncmp(p, "shift:", 6) == 0
&& ((p[6] == '-' && ascii_isdigit(p[7])) || ascii_isdigit(p[6]))) {
p += 6;
bri_shift = getdigits_int(&p, true, 0);
} else if (strncmp(p, "min:", 4) == 0 && ascii_isdigit(p[4])) {
p += 4;
bri_min = getdigits_int(&p, true, 0);
} else if (strncmp(p, "sbr", 3) == 0) {
p += 3;
bri_sbr = true;
} else if (strncmp(p, "list:", 5) == 0) {
p += 5;
bri_list = (int)getdigits(&p, false, 0);
} else if (strncmp(p, "column:", 7) == 0) {
p += 7;
bri_vcol = (int)getdigits(&p, false, 0);
}
if (*p != ',' && *p != NUL) {
return false;
}
if (*p == ',') {
p++;
}
}
if (wp == NULL) {
return OK;
}
wp->w_briopt_shift = bri_shift;
wp->w_briopt_min = bri_min;
wp->w_briopt_sbr = bri_sbr;
wp->w_briopt_list = bri_list;
wp->w_briopt_vcol = bri_vcol;
return true;
}
// Return appropriate space number for breakindent, taking influencing
// parameters into account. Window must be specified, since it is not
// necessarily always the current one.
int get_breakindent_win(win_T *wp, char *line)
FUNC_ATTR_NONNULL_ALL
{
static int prev_indent = 0; // cached indent value
static OptInt prev_ts = 0; // cached tabstop value
static colnr_T *prev_vts = NULL; // cached vartabs values
static int prev_fnum = 0; // cached buffer number
static char *prev_line = NULL; // cached copy of "line"
static varnumber_T prev_tick = 0; // changedtick of cached value
static int prev_list = 0; // cached list indent
static int prev_listopt = 0; // cached w_p_briopt_list value
static bool prev_no_ts = false; // cached no_ts value
static unsigned prev_dy_uhex = 0; // cached 'display' "uhex" value
static char *prev_flp = NULL; // cached formatlistpat value
int bri = 0;
// window width minus window margin space, i.e. what rests for text
const int eff_wwidth = wp->w_view_width - win_col_off(wp) + win_col_off2(wp);
// In list mode, if 'listchars' "tab" isn't set, a TAB is displayed as ^I.
const bool no_ts = wp->w_p_list && wp->w_p_lcs_chars.tab1 == NUL;
// Used cached indent, unless
// - buffer changed, or
// - 'tabstop' changed, or
// - 'vartabstop' changed, or
// - buffer was changed, or
// - 'breakindentopt' "list" changed, or
// - 'list' or 'listchars' "tab" changed, or
// - 'display' "uhex" flag changed, or
// - 'formatlistpat' changed, or
// - line changed.
if (prev_fnum != wp->w_buffer->b_fnum
|| prev_ts != wp->w_buffer->b_p_ts
|| prev_vts != wp->w_buffer->b_p_vts_array
|| prev_tick != buf_get_changedtick(wp->w_buffer)
|| prev_listopt != wp->w_briopt_list
|| prev_no_ts != no_ts
|| prev_dy_uhex != (dy_flags & kOptDyFlagUhex)
|| prev_flp == NULL
|| strcmp(prev_flp, get_flp_value(wp->w_buffer)) != 0
|| prev_line == NULL || strcmp(prev_line, line) != 0) {
prev_fnum = wp->w_buffer->b_fnum;
xfree(prev_line);
prev_line = xstrdup(line);
prev_ts = wp->w_buffer->b_p_ts;
prev_vts = wp->w_buffer->b_p_vts_array;
if (wp->w_briopt_vcol == 0) {
if (no_ts) {
prev_indent = indent_size_no_ts(line);
} else {
prev_indent = indent_size_ts(line, wp->w_buffer->b_p_ts,
wp->w_buffer->b_p_vts_array);
}
}
prev_tick = buf_get_changedtick(wp->w_buffer);
prev_listopt = wp->w_briopt_list;
prev_list = 0;
prev_no_ts = no_ts;
prev_dy_uhex = (dy_flags & kOptDyFlagUhex);
xfree(prev_flp);
prev_flp = xstrdup(get_flp_value(wp->w_buffer));
// add additional indent for numbered lists
if (wp->w_briopt_list != 0 && wp->w_briopt_vcol == 0) {
regmatch_T regmatch = {
.regprog = vim_regcomp(prev_flp, RE_MAGIC + RE_STRING + RE_AUTO + RE_STRICT),
};
if (regmatch.regprog != NULL) {
regmatch.rm_ic = false;
if (vim_regexec(&regmatch, line, 0)) {
if (wp->w_briopt_list > 0) {
prev_list += wp->w_briopt_list;
} else {
char *ptr = *regmatch.startp;
char *end_ptr = *regmatch.endp;
int indent = 0;
// Compute the width of the matched text.
// Use win_chartabsize() so that TAB size is correct,
// while wrapping is ignored.
while (ptr < end_ptr) {
indent += win_chartabsize(wp, ptr, indent);
MB_PTR_ADV(ptr);
}
prev_indent = indent;
}
}
vim_regfree(regmatch.regprog);
}
}
}
if (wp->w_briopt_vcol != 0) {
// column value has priority
bri = wp->w_briopt_vcol;
prev_list = 0;
} else {
bri = prev_indent + wp->w_briopt_shift;
}
// Add offset for number column, if 'n' is in 'cpoptions'
bri += win_col_off2(wp);
// add additional indent for numbered lists
if (wp->w_briopt_list > 0) {
bri += prev_list;
}
// indent minus the length of the showbreak string
if (wp->w_briopt_sbr) {
bri -= vim_strsize(get_showbreak_value(wp));
}
// never indent past left window margin
if (bri < 0) {
bri = 0;
} else if (bri > eff_wwidth - wp->w_briopt_min) {
// always leave at least bri_min characters on the left,
// if text width is sufficient
bri = (eff_wwidth - wp->w_briopt_min < 0)
? 0 : eff_wwidth - wp->w_briopt_min;
}
return bri;
}
// When extra == 0: Return true if the cursor is before or on the first
// non-blank in the line.
// When extra == 1: Return true if the cursor is before the first non-blank in
// the line.
bool inindent(int extra)
{
char *ptr;
colnr_T col;
for (col = 0, ptr = get_cursor_line_ptr(); ascii_iswhite(*ptr); col++) {
ptr++;
}
if (col >= curwin->w_cursor.col + extra) {
return true;
}
return false;
}
/// Handle reindenting a block of lines.
void op_reindent(oparg_T *oap, Indenter how)
{
int i = 0;
linenr_T first_changed = 0;
linenr_T last_changed = 0;
linenr_T start_lnum = curwin->w_cursor.lnum;
// Don't even try when 'modifiable' is off.
if (!MODIFIABLE(curbuf)) {
emsg(_(e_modifiable));
return;
}
// Save for undo. Do this once for all lines, much faster than doing this
// for each line separately, especially when undoing.
if (u_savecommon(curbuf, start_lnum - 1, start_lnum + oap->line_count,
start_lnum + oap->line_count, false) == OK) {
int amount;
for (i = oap->line_count - 1; i >= 0 && !got_int; i--) {
// it's a slow thing to do, so give feedback so there's no worry
// that the computer's just hung.
if (i > 1
&& (i % 50 == 0 || i == oap->line_count - 1)
&& oap->line_count > p_report) {
smsg(0, _("%" PRId64 " lines to indent... "), (int64_t)i);
}
// Be vi-compatible: For lisp indenting the first line is not
// indented, unless there is only one line.
if (i != oap->line_count - 1 || oap->line_count == 1
|| how != get_lisp_indent) {
char *l = skipwhite(get_cursor_line_ptr());
if (*l == NUL) { // empty or blank line
amount = 0;
} else {
amount = how(); // get the indent for this line
}
if (amount >= 0 && set_indent(amount, 0)) {
// did change the indent, call changed_lines() later
if (first_changed == 0) {
first_changed = curwin->w_cursor.lnum;
}
last_changed = curwin->w_cursor.lnum;
}
}
curwin->w_cursor.lnum++;
curwin->w_cursor.col = 0; // make sure it's valid
}
}
// put cursor on first non-blank of indented line
curwin->w_cursor.lnum = start_lnum;
beginline(BL_SOL | BL_FIX);
// Mark changed lines so that they will be redrawn. When Visual
// highlighting was present, need to continue until the last line. When
// there is no change still need to remove the Visual highlighting.
if (last_changed != 0) {
changed_lines(curbuf, first_changed, 0,
oap->is_VIsual ? start_lnum + oap->line_count
: last_changed + 1, 0, true);
} else if (oap->is_VIsual) {
redraw_curbuf_later(UPD_INVERTED);
}
if (oap->line_count > p_report) {
i = oap->line_count - (i + 1);
smsg(0, NGETTEXT("%" PRId64 " line indented ", "%" PRId64 " lines indented ", i), (int64_t)i);
}
if ((cmdmod.cmod_flags & CMOD_LOCKMARKS) == 0) {
// set '[ and '] marks
curbuf->b_op_start = oap->start;
curbuf->b_op_end = oap->end;
}
}
/// @return true if lines starting with '#' should be left aligned.
bool preprocs_left(void)
{
return ((curbuf->b_p_si && !curbuf->b_p_cin)
|| (curbuf->b_p_cin && in_cinkeys('#', ' ', true)
&& curbuf->b_ind_hash_comment == 0));
}
/// @return true if the conditions are OK for smart indenting.
bool may_do_si(void)
{
return curbuf->b_p_si && !curbuf->b_p_cin && *curbuf->b_p_inde == NUL && !p_paste;
}
// Try to do some very smart auto-indenting.
// Used when inserting a "normal" character.
void ins_try_si(int c)
{
pos_T *pos;
// do some very smart indenting when entering '{' or '}'
if (((did_si || can_si_back) && c == '{') || (can_si && c == '}' && inindent(0))) {
pos_T old_pos;
char *ptr;
int i;
bool temp;
// for '}' set indent equal to indent of line containing matching '{'
if (c == '}' && (pos = findmatch(NULL, '{')) != NULL) {
old_pos = curwin->w_cursor;
// If the matching '{' has a ')' immediately before it (ignoring
// white-space), then line up with the start of the line
// containing the matching '(' if there is one. This handles the
// case where an "if (..\n..) {" statement continues over multiple
// lines -- webb
ptr = ml_get(pos->lnum);
i = pos->col;
if (i > 0) { // skip blanks before '{'
while (--i > 0 && ascii_iswhite(ptr[i])) {}
}
curwin->w_cursor.lnum = pos->lnum;
curwin->w_cursor.col = i;
if (ptr[i] == ')' && (pos = findmatch(NULL, '(')) != NULL) {
curwin->w_cursor = *pos;
}
i = get_indent();
curwin->w_cursor = old_pos;
if (State & VREPLACE_FLAG) {
change_indent(INDENT_SET, i, false, true);
} else {
set_indent(i, SIN_CHANGED);
}
} else if (curwin->w_cursor.col > 0) {
// when inserting '{' after "O" reduce indent, but not
// more than indent of previous line
temp = true;
if (c == '{' && can_si_back && curwin->w_cursor.lnum > 1) {
old_pos = curwin->w_cursor;
i = get_indent();
while (curwin->w_cursor.lnum > 1) {
ptr = skipwhite(ml_get(--(curwin->w_cursor.lnum)));
// ignore empty lines and lines starting with '#'.
if (*ptr != '#' && *ptr != NUL) {
break;
}
}
if (get_indent() >= i) {
temp = false;
}
curwin->w_cursor = old_pos;
}
if (temp) {
shift_line(true, false, 1, true);
}
}
}
// set indent of '#' always to 0
if (curwin->w_cursor.col > 0 && can_si && c == '#' && inindent(0)) {
// remember current indent for next line
old_indent = get_indent();
set_indent(0, SIN_CHANGED);
}
// Adjust ai_col, the char at this position can be deleted.
ai_col = MIN(ai_col, curwin->w_cursor.col);
}
/// Insert an indent (for <Tab> or CTRL-T) or delete an indent (for CTRL-D).
/// Keep the cursor on the same character.
/// type == INDENT_INC increase indent (for CTRL-T or <Tab>)
/// type == INDENT_DEC decrease indent (for CTRL-D)
/// type == INDENT_SET set indent to "amount"
///
/// @param round if true, round the indent to 'shiftwidth' (only with _INC and _Dec).
/// @param call_changed_bytes call changed_bytes()
void change_indent(int type, int amount, int round, bool call_changed_bytes)
{
int insstart_less; // reduction for Insstart.col
colnr_T orig_col = 0; // init for GCC
char *orig_line = NULL; // init for GCC
// MODE_VREPLACE state needs to know what the line was like before changing
if (State & VREPLACE_FLAG) {
orig_line = xstrnsave(get_cursor_line_ptr(), (size_t)get_cursor_line_len());
orig_col = curwin->w_cursor.col;
}
// for the following tricks we don't want list mode
int save_p_list = curwin->w_p_list;
curwin->w_p_list = false;
colnr_T vc = getvcol_nolist(&curwin->w_cursor);
int vcol = vc;
// For Replace mode we need to fix the replace stack later, which is only
// possible when the cursor is in the indent. Remember the number of
// characters before the cursor if it's possible.
int start_col = curwin->w_cursor.col;
// determine offset from first non-blank
int new_cursor_col = curwin->w_cursor.col;
beginline(BL_WHITE);
new_cursor_col -= curwin->w_cursor.col;
insstart_less = curwin->w_cursor.col;
// If the cursor is in the indent, compute how many screen columns the
// cursor is to the left of the first non-blank.
if (new_cursor_col < 0) {
vcol = get_indent() - vcol;
}
if (new_cursor_col > 0) { // can't fix replace stack
start_col = -1;
}
// Set the new indent. The cursor will be put on the first non-blank.
if (type == INDENT_SET) {
set_indent(amount, call_changed_bytes ? SIN_CHANGED : 0);
} else {
int save_State = State;
// Avoid being called recursively.
if (State & VREPLACE_FLAG) {
State = MODE_INSERT;
}
shift_line(type == INDENT_DEC, round, 1, call_changed_bytes);
State = save_State;
}
insstart_less -= curwin->w_cursor.col;
// Try to put cursor on same character.
// If the cursor is at or after the first non-blank in the line,
// compute the cursor column relative to the column of the first
// non-blank character.
// If we are not in insert mode, leave the cursor on the first non-blank.
// If the cursor is before the first non-blank, position it relative
// to the first non-blank, counted in screen columns.
if (new_cursor_col >= 0) {
// When changing the indent while the cursor is touching it, reset
// Insstart_col to 0.
if (new_cursor_col == 0) {
insstart_less = MAXCOL;
}
new_cursor_col += curwin->w_cursor.col;
} else if (!(State & MODE_INSERT)) {
new_cursor_col = curwin->w_cursor.col;
} else {
// Compute the screen column where the cursor should be.
vcol = get_indent() - vcol;
int const end_vcol = (colnr_T)((vcol < 0) ? 0 : vcol);
curwin->w_virtcol = end_vcol;
// Advance the cursor until we reach the right screen column.
new_cursor_col = 0;
char *const line = get_cursor_line_ptr();
vcol = 0;
if (*line != NUL) {
CharsizeArg csarg;
CSType cstype = init_charsize_arg(&csarg, curwin, 0, line);
StrCharInfo ci = utf_ptr2StrCharInfo(line);
while (true) {
int next_vcol = vcol + win_charsize(cstype, vcol, ci.ptr, ci.chr.value, &csarg).width;
if (next_vcol > end_vcol) {
break;
}
vcol = next_vcol;
ci = utfc_next(ci);
if (*ci.ptr == NUL) {
break;
}
}
new_cursor_col = (int)(ci.ptr - line);
}
// May need to insert spaces to be able to position the cursor on
// the right screen column.
if (vcol != (int)curwin->w_virtcol) {
curwin->w_cursor.col = (colnr_T)new_cursor_col;
const size_t ptrlen = (size_t)(curwin->w_virtcol - vcol);
char *ptr = xmallocz(ptrlen);
memset(ptr, ' ', ptrlen);
new_cursor_col += (int)ptrlen;
ins_str(ptr, ptrlen);
xfree(ptr);
}
// When changing the indent while the cursor is in it, reset
// Insstart_col to 0.
insstart_less = MAXCOL;
}
curwin->w_p_list = save_p_list;
curwin->w_cursor.col = MAX(0, (colnr_T)new_cursor_col);
curwin->w_set_curswant = true;
changed_cline_bef_curs(curwin);
// May have to adjust the start of the insert.
if (State & MODE_INSERT) {
if (curwin->w_cursor.lnum == Insstart.lnum && Insstart.col != 0) {
if ((int)Insstart.col <= insstart_less) {
Insstart.col = 0;
} else {
Insstart.col -= insstart_less;
}
}
if ((int)ai_col <= insstart_less) {
ai_col = 0;
} else {
ai_col -= insstart_less;
}
}
// For MODE_REPLACE state, may have to fix the replace stack, if it's
// possible. If the number of characters before the cursor decreased, need
// to pop a few characters from the replace stack.
// If the number of characters before the cursor increased, need to push a
// few NULs onto the replace stack.
if (REPLACE_NORMAL(State) && start_col >= 0) {
while (start_col > (int)curwin->w_cursor.col) {
replace_join(0); // remove a NUL from the replace stack
start_col--;
}
while (start_col < (int)curwin->w_cursor.col) {
replace_push_nul();
start_col++;
}
}
// For MODE_VREPLACE state, we also have to fix the replace stack. In this
// case it is always possible because we backspace over the whole line and
// then put it back again the way we wanted it.
if (State & VREPLACE_FLAG) {
// Save new line
char *new_line = xstrnsave(get_cursor_line_ptr(), (size_t)get_cursor_line_len());
// We only put back the new line up to the cursor
new_line[curwin->w_cursor.col] = NUL;
int new_col = curwin->w_cursor.col;
// Put back original line
ml_replace(curwin->w_cursor.lnum, orig_line, false);
curwin->w_cursor.col = orig_col;
curbuf_splice_pending++;
// Backspace from cursor to start of line
backspace_until_column(0);
// Insert new stuff into line again
ins_bytes(new_line);
xfree(new_line);
curbuf_splice_pending--;
// TODO(bfredl): test for crazy edge cases, like we stand on a TAB or
// something? does this even do the right text change then?
int delta = orig_col - new_col;
extmark_splice_cols(curbuf, (int)curwin->w_cursor.lnum - 1, new_col,
delta < 0 ? -delta : 0,
delta > 0 ? delta : 0,
kExtmarkUndo);
}
}
/// Copy the indent from ptr to the current line (and fill to size).
/// Leaves the cursor on the first non-blank in the line.
///
/// @return true if the line was changed.
bool copy_indent(int size, char *src)
{
char *p = NULL;
char *line = NULL;
int ind_len;
int line_len = 0;
int tab_pad;
// Round 1: compute the number of characters needed for the indent
// Round 2: copy the characters.
for (int round = 1; round <= 2; round++) {
int todo = size;
ind_len = 0;
int ind_done = 0;
int ind_col = 0;
char *s = src;
// Count/copy the usable portion of the source line.
while (todo > 0 && ascii_iswhite(*s)) {
if (*s == TAB) {
tab_pad = tabstop_padding(ind_done,
curbuf->b_p_ts,
curbuf->b_p_vts_array);
// Stop if this tab will overshoot the target.
if (todo < tab_pad) {
break;
}
todo -= tab_pad;
ind_done += tab_pad;
ind_col += tab_pad;
} else {
todo--;
ind_done++;
ind_col++;
}
ind_len++;
if (p != NULL) {
*p++ = *s;
}
s++;
}
// Fill to next tabstop with a tab, if possible.
tab_pad = tabstop_padding(ind_done, curbuf->b_p_ts, curbuf->b_p_vts_array);
if ((todo >= tab_pad) && !curbuf->b_p_et) {
todo -= tab_pad;
ind_len++;
ind_col += tab_pad;
if (p != NULL) {
*p++ = TAB;
}
}
// Add tabs required for indent.
if (!curbuf->b_p_et) {
while (true) {
tab_pad = tabstop_padding(ind_col,
curbuf->b_p_ts,
curbuf->b_p_vts_array);
if (todo < tab_pad) {
break;
}
todo -= tab_pad;
ind_len++;
ind_col += tab_pad;
if (p != NULL) {
*p++ = TAB;
}
}
}
// Count/add spaces required for indent.
while (todo > 0) {
todo--;
ind_len++;
if (p != NULL) {
*p++ = ' ';
}
}
if (p == NULL) {
// Allocate memory for the result: the copied indent, new indent
// and the rest of the line.
line_len = get_cursor_line_len() + 1;
assert(ind_len + line_len >= 0);
size_t line_size;
STRICT_ADD(ind_len, line_len, &line_size, size_t);
line = xmalloc(line_size);
p = line;
}
}
// Append the original line
memmove(p, get_cursor_line_ptr(), (size_t)line_len);
// Replace the line
ml_replace(curwin->w_cursor.lnum, line, false);
// Put the cursor after the indent.
curwin->w_cursor.col = ind_len;
return true;
}
/// Give a "resulting text too long" error and maybe set got_int.
static void emsg_text_too_long(void)
{
emsg(_(e_resulting_text_too_long));
// when not inside a try/catch set got_int to break out of any loop
if (trylevel == 0) {
got_int = true;
}
}
/// ":retab".
void ex_retab(exarg_T *eap)
{
bool got_tab = false;
int num_spaces = 0;
int start_col = 0; // For start of white-space string
int64_t start_vcol = 0; // For start of white-space string
char *new_line = (char *)1; // init to non-NULL
colnr_T *new_vts_array = NULL;
char *new_ts_str; // string value of tab argument
linenr_T first_line = 0; // first changed line
linenr_T last_line = 0; // last changed line
bool is_indent_only = false;
int save_list = curwin->w_p_list;
curwin->w_p_list = 0; // don't want list mode here
char *ptr = eap->arg;
if (strncmp(ptr, "-indentonly", 11) == 0 && ascii_iswhite_or_nul(ptr[11])) {
is_indent_only = true;
ptr = skipwhite(ptr + 11);
}
new_ts_str = ptr;
if (!tabstop_set(ptr, &new_vts_array)) {
return;
}
while (ascii_isdigit(*ptr) || *ptr == ',') {
ptr++;
}
// This ensures that either new_vts_array and new_ts_str are freshly
// allocated, or new_vts_array points to an existing array and new_ts_str
// is null.
if (new_vts_array == NULL) {
new_vts_array = curbuf->b_p_vts_array;
new_ts_str = NULL;
} else {
new_ts_str = xmemdupz(new_ts_str, (size_t)(ptr - new_ts_str));
}
for (linenr_T lnum = eap->line1; !got_int && lnum <= eap->line2; lnum++) {
ptr = ml_get(lnum);
int old_len = ml_get_len(lnum);
int col = 0;
int64_t vcol = 0;
bool did_undo = false; // called u_save for current line
while (true) {
if (ascii_iswhite(ptr[col])) {
if (!got_tab && num_spaces == 0) {
// First consecutive white-space
start_vcol = vcol;
start_col = col;
}
if (ptr[col] == ' ') {
num_spaces++;
} else {
got_tab = true;
}
} else {
if (got_tab || (eap->forceit && num_spaces > 1)) {
// Retabulate this string of white-space
// len is virtual length of white string
int len = num_spaces = (int)(vcol - start_vcol);
int num_tabs = 0;
if (!curbuf->b_p_et) {
int t, s;
tabstop_fromto((colnr_T)start_vcol, (colnr_T)vcol,
(int)curbuf->b_p_ts, new_vts_array, &t, &s);
num_tabs = t;
num_spaces = s;
}
if (curbuf->b_p_et || got_tab
|| (num_spaces + num_tabs < len)) {
if (did_undo == false) {
did_undo = true;
if (u_save((linenr_T)(lnum - 1),
(linenr_T)(lnum + 1)) == FAIL) {
new_line = NULL; // flag out-of-memory
break;
}
}
// len is actual number of white characters used
len = num_spaces + num_tabs;
const int new_len = old_len - col + start_col + len + 1;
if (new_len <= 0 || new_len >= MAXCOL) {
emsg_text_too_long();
break;
}
new_line = xmalloc((size_t)new_len);
if (start_col > 0) {
memmove(new_line, ptr, (size_t)start_col);
}
memmove(new_line + start_col + len,
ptr + col, (size_t)old_len - (size_t)col + 1);
ptr = new_line + start_col;
for (col = 0; col < len; col++) {
ptr[col] = (col < num_tabs) ? '\t' : ' ';
}
if (ml_replace(lnum, new_line, false) == OK) {
// "new_line" may have been copied
new_line = curbuf->b_ml.ml_line_ptr;
extmark_splice_cols(curbuf, lnum - 1, 0, (colnr_T)old_len,
(colnr_T)new_len - 1, kExtmarkUndo);
}
if (first_line == 0) {
first_line = lnum;
}
last_line = lnum;
ptr = new_line;
old_len = new_len - 1;
col = start_col + len;
}
}
got_tab = false;
num_spaces = 0;
if (is_indent_only) {
break;
}
}
if (ptr[col] == NUL) {
break;
}
vcol += win_chartabsize(curwin, ptr + col, (colnr_T)vcol);
if (vcol >= MAXCOL) {
emsg_text_too_long();
break;
}
col += utfc_ptr2len(ptr + col);
}
if (new_line == NULL) { // out of memory
break;
}
line_breakcheck();
}
if (got_int) {
emsg(_(e_interr));
}
// If a single value was given then it can be considered equal to
// either the value of 'tabstop' or the value of 'vartabstop'.
if (tabstop_count(curbuf->b_p_vts_array) == 0
&& tabstop_count(new_vts_array) == 1
&& curbuf->b_p_ts == tabstop_first(new_vts_array)) {
// not changed
} else if (tabstop_count(curbuf->b_p_vts_array) > 0
&& tabstop_eq(curbuf->b_p_vts_array, new_vts_array)) {
// not changed
} else {
redraw_curbuf_later(UPD_NOT_VALID);
}
if (first_line != 0) {
changed_lines(curbuf, first_line, 0, last_line + 1, 0, true);
}
curwin->w_p_list = save_list; // restore 'list'
if (new_ts_str != NULL) { // set the new tabstop
// If 'vartabstop' is in use or if the value given to retab has more
// than one tabstop then update 'vartabstop'.
colnr_T *old_vts_ary = curbuf->b_p_vts_array;
if (tabstop_count(old_vts_ary) > 0 || tabstop_count(new_vts_array) > 1) {
set_option_direct(kOptVartabstop, CSTR_AS_OPTVAL(new_ts_str), OPT_LOCAL, 0);
curbuf->b_p_vts_array = new_vts_array;
xfree(old_vts_ary);
} else {
// 'vartabstop' wasn't in use and a single value was given to
// retab then update 'tabstop'.
curbuf->b_p_ts = tabstop_first(new_vts_array);
xfree(new_vts_array);
}
xfree(new_ts_str);
}
coladvance(curwin, curwin->w_curswant);
u_clearline(curbuf);
}
/// Get indent level from 'indentexpr'.
int get_expr_indent(void)
{
bool use_sandbox = was_set_insecurely(curwin, kOptIndentexpr, OPT_LOCAL);
const sctx_T save_sctx = current_sctx;
// Save and restore cursor position and curswant, in case it was changed
// * via :normal commands.
pos_T save_pos = curwin->w_cursor;
colnr_T save_curswant = curwin->w_curswant;
bool save_set_curswant = curwin->w_set_curswant;
set_vim_var_nr(VV_LNUM, (varnumber_T)curwin->w_cursor.lnum);
if (use_sandbox) {
sandbox++;
}
textlock++;
current_sctx = curbuf->b_p_script_ctx[kBufOptIndentexpr];
// Need to make a copy, the 'indentexpr' option could be changed while
// evaluating it.
char *inde_copy = xstrdup(curbuf->b_p_inde);
int indent = (int)eval_to_number(inde_copy, true);
xfree(inde_copy);
if (use_sandbox) {
sandbox--;
}
textlock--;
current_sctx = save_sctx;
// Restore the cursor position so that 'indentexpr' doesn't need to.
// Pretend to be in Insert mode, allow cursor past end of line for "o"
// command.
int save_State = State;
State = MODE_INSERT;
curwin->w_cursor = save_pos;
curwin->w_curswant = save_curswant;
curwin->w_set_curswant = save_set_curswant;
check_cursor(curwin);
State = save_State;
// Reset did_throw, unless 'debug' has "throw" and inside a try/catch.
if (did_throw && (vim_strchr(p_debug, 't') == NULL || trylevel == 0)) {
handle_did_throw();
did_throw = false;
}
// If there is an error, just keep the current indent.
if (indent < 0) {
indent = get_indent();
}
return indent;
}
// When 'p' is present in 'cpoptions, a Vi compatible method is used.
// The incompatible newer method is quite a bit better at indenting
// code in lisp-like languages than the traditional one; it's still
// mostly heuristics however -- Dirk van Deun, dirk@rave.org
// TODO(unknown):
// Findmatch() should be adapted for lisp, also to make showmatch
// work correctly: now (v5.3) it seems all C/C++ oriented:
// - it does not recognize the #\( and #\) notations as character literals
// - it doesn't know about comments starting with a semicolon
// - it incorrectly interprets '(' as a character literal
// All this messes up get_lisp_indent in some rare cases.
// Update from Sergey Khorev:
// I tried to fix the first two issues.
int get_lisp_indent(void)
{
pos_T *pos;
pos_T paren;
int amount;
pos_T realpos = curwin->w_cursor;
curwin->w_cursor.col = 0;
if ((pos = findmatch(NULL, '(')) == NULL) {
pos = findmatch(NULL, '[');
} else {
paren = *pos;
pos = findmatch(NULL, '[');
if ((pos == NULL) || lt(*pos, paren)) {
pos = &paren;
}
}
if (pos != NULL) {
// Extra trick: Take the indent of the first previous non-white
// line that is at the same () level.
amount = -1;
int parencount = 0;
while (--curwin->w_cursor.lnum >= pos->lnum) {
if (linewhite(curwin->w_cursor.lnum)) {
continue;
}
for (char *that = get_cursor_line_ptr(); *that != NUL; that++) {
if (*that == ';') {
while (*(that + 1) != NUL) {
that++;
}
continue;
}
if (*that == '\\') {
if (*(that + 1) != NUL) {
that++;
}
continue;
}
if ((*that == '"') && (*(that + 1) != NUL)) {
while (*++that && *that != '"') {
// Skipping escaped characters in the string
if (*that == '\\') {
if (*++that == NUL) {
break;
}
if (that[1] == NUL) {
that++;
break;
}
}
}
if (*that == NUL) {
break;
}
}
if ((*that == '(') || (*that == '[')) {
parencount++;
} else if ((*that == ')') || (*that == ']')) {
parencount--;
}
}
if (parencount == 0) {
amount = get_indent();
break;
}
}
if (amount == -1) {
curwin->w_cursor.lnum = pos->lnum;
curwin->w_cursor.col = pos->col;
colnr_T col = pos->col;
char *line = get_cursor_line_ptr();
CharsizeArg csarg;
CSType cstype = init_charsize_arg(&csarg, curwin, pos->lnum, line);
StrCharInfo sci = utf_ptr2StrCharInfo(line);
amount = 0;
while (*sci.ptr != NUL && col > 0) {
amount += win_charsize(cstype, amount, sci.ptr, sci.chr.value, &csarg).width;
sci = utfc_next(sci);
col--;
}
char *that = sci.ptr;
// Some keywords require "body" indenting rules (the
// non-standard-lisp ones are Scheme special forms):
// (let ((a 1)) instead (let ((a 1))
// (...)) of (...))
if (((*that == '(') || (*that == '[')) && lisp_match(that + 1)) {
amount += 2;
} else {
if (*that != NUL) {
that++;
amount++;
}
colnr_T firsttry = amount;
while (ascii_iswhite(*that)) {
amount += win_charsize(cstype, amount, that, (uint8_t)(*that), &csarg).width;
that++;
}
if (*that && (*that != ';')) {
// Not a comment line.
// Test *that != '(' to accommodate first let/do
// argument if it is more than one line.
if ((*that != '(') && (*that != '[')) {
firsttry++;
}
parencount = 0;
CharInfo ci = utf_ptr2CharInfo(that);
if (((ci.value != '"') && (ci.value != '\'') && (ci.value != '#')
&& ((ci.value < '0') || (ci.value > '9')))) {
int quotecount = 0;
while (*that && (!ascii_iswhite(ci.value) || quotecount || parencount)) {
if (ci.value == '"') {
quotecount = !quotecount;
}
if (((ci.value == '(') || (ci.value == '[')) && !quotecount) {
parencount++;
}
if (((ci.value == ')') || (ci.value == ']')) && !quotecount) {
parencount--;
}
if ((ci.value == '\\') && (*(that + 1) != NUL)) {
amount += win_charsize(cstype, amount, that, ci.value, &csarg).width;
StrCharInfo next_sci = utfc_next((StrCharInfo){ that, ci });
that = next_sci.ptr;
ci = next_sci.chr;
}
amount += win_charsize(cstype, amount, that, ci.value, &csarg).width;
StrCharInfo next_sci = utfc_next((StrCharInfo){ that, ci });
that = next_sci.ptr;
ci = next_sci.chr;
}
}
while (ascii_iswhite(*that)) {
amount += win_charsize(cstype, amount, that, (uint8_t)(*that), &csarg).width;
that++;
}
if (!*that || (*that == ';')) {
amount = firsttry;
}
}
}
}
} else {
amount = 0; // No matching '(' or '[' found, use zero indent.
}
curwin->w_cursor = realpos;
return amount;
}
static int lisp_match(char *p)
{
char buf[512];
char *word = *curbuf->b_p_lw != NUL ? curbuf->b_p_lw : p_lispwords;
while (*word != NUL) {
size_t len = copy_option_part(&word, buf, sizeof(buf), ",");
if ((strncmp(buf, p, len) == 0) && ascii_iswhite_or_nul(p[len])) {
return true;
}
}
return false;
}
/// Re-indent the current line, based on the current contents of it and the
/// surrounding lines. Fixing the cursor position seems really easy -- I'm very
/// confused what all the part that handles Control-T is doing that I'm not.
/// "get_the_indent" should be get_c_indent, get_expr_indent or get_lisp_indent.
void fixthisline(IndentGetter get_the_indent)
{
int amount = get_the_indent();
if (amount < 0) {
return;
}
change_indent(INDENT_SET, amount, false, true);
if (linewhite(curwin->w_cursor.lnum)) {
did_ai = true; // delete the indent if the line stays empty
}
}
/// Return true if 'indentexpr' should be used for Lisp indenting.
/// Caller may want to check 'autoindent'.
bool use_indentexpr_for_lisp(void)
{
return curbuf->b_p_lisp
&& *curbuf->b_p_inde != NUL
&& strcmp(curbuf->b_p_lop, "expr:1") == 0;
}
/// Fix indent for 'lisp' and 'cindent'.
void fix_indent(void)
{
if (p_paste) {
return; // no auto-indenting when 'paste' is set
}
if (curbuf->b_p_lisp && curbuf->b_p_ai) {
if (use_indentexpr_for_lisp()) {
do_c_expr_indent();
} else {
fixthisline(get_lisp_indent);
}
} else if (cindent_on()) {
do_c_expr_indent();
}
}
/// "indent()" function
void f_indent(typval_T *argvars, typval_T *rettv, EvalFuncData fptr)
{
const linenr_T lnum = tv_get_lnum(argvars);
if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count) {
rettv->vval.v_number = get_indent_lnum(lnum);
} else {
rettv->vval.v_number = -1;
}
}
/// "lispindent(lnum)" function
void f_lispindent(typval_T *argvars, typval_T *rettv, EvalFuncData fptr)
{
const pos_T pos = curwin->w_cursor;
const linenr_T lnum = tv_get_lnum(argvars);
if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count) {
curwin->w_cursor.lnum = lnum;
rettv->vval.v_number = get_lisp_indent();
curwin->w_cursor = pos;
} else {
rettv->vval.v_number = -1;
}
}
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