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vim/src/getchar.c
Bram Moolenaar 306139005c patch 8.1.2380: using old C style comments 
Problem:    Using old C style comments.
Solution:   Use // comments where appropriate.
2019-12-01 22:11:18 +01:00

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/* vi:set ts=8 sts=4 sw=4 noet:
*
* VIM - Vi IMproved by Bram Moolenaar
*
* Do ":help uganda" in Vim to read copying and usage conditions.
* Do ":help credits" in Vim to see a list of people who contributed.
* See README.txt for an overview of the Vim source code.
*/
/*
* getchar.c
*
* functions related with getting a character from the user/mapping/redo/...
*
* manipulations with redo buffer and stuff buffer
* mappings and abbreviations
*/
#include "vim.h"
/*
* These buffers are used for storing:
* - stuffed characters: A command that is translated into another command.
* - redo characters: will redo the last change.
* - recorded characters: for the "q" command.
*
* The bytes are stored like in the typeahead buffer:
* - K_SPECIAL introduces a special key (two more bytes follow). A literal
* K_SPECIAL is stored as K_SPECIAL KS_SPECIAL KE_FILLER.
* - CSI introduces a GUI termcap code (also when gui.in_use is FALSE,
* otherwise switching the GUI on would make mappings invalid).
* A literal CSI is stored as CSI KS_EXTRA KE_CSI.
* These translations are also done on multi-byte characters!
*
* Escaping CSI bytes is done by the system-specific input functions, called
* by ui_inchar().
* Escaping K_SPECIAL is done by inchar().
* Un-escaping is done by vgetc().
*/
#define MINIMAL_SIZE 20 // minimal size for b_str
static buffheader_T redobuff = {{NULL, {NUL}}, NULL, 0, 0};
static buffheader_T old_redobuff = {{NULL, {NUL}}, NULL, 0, 0};
static buffheader_T recordbuff = {{NULL, {NUL}}, NULL, 0, 0};
static int typeahead_char = 0; // typeahead char that's not flushed
/*
* when block_redo is TRUE redo buffer will not be changed
* used by edit() to repeat insertions and 'V' command for redoing
*/
static int block_redo = FALSE;
static int KeyNoremap = 0; // remapping flags
/*
* Variables used by vgetorpeek() and flush_buffers().
*
* typebuf.tb_buf[] contains all characters that are not consumed yet.
* typebuf.tb_buf[typebuf.tb_off] is the first valid character.
* typebuf.tb_buf[typebuf.tb_off + typebuf.tb_len - 1] is the last valid char.
* typebuf.tb_buf[typebuf.tb_off + typebuf.tb_len] must be NUL.
* The head of the buffer may contain the result of mappings, abbreviations
* and @a commands. The length of this part is typebuf.tb_maplen.
* typebuf.tb_silent is the part where <silent> applies.
* After the head are characters that come from the terminal.
* typebuf.tb_no_abbr_cnt is the number of characters in typebuf.tb_buf that
* should not be considered for abbreviations.
* Some parts of typebuf.tb_buf may not be mapped. These parts are remembered
* in typebuf.tb_noremap[], which is the same length as typebuf.tb_buf and
* contains RM_NONE for the characters that are not to be remapped.
* typebuf.tb_noremap[typebuf.tb_off] is the first valid flag.
* (typebuf has been put in globals.h, because check_termcode() needs it).
*/
#define RM_YES 0 // tb_noremap: remap
#define RM_NONE 1 // tb_noremap: don't remap
#define RM_SCRIPT 2 // tb_noremap: remap local script mappings
#define RM_ABBR 4 // tb_noremap: don't remap, do abbrev.
// typebuf.tb_buf has three parts: room in front (for result of mappings), the
// middle for typeahead and room for new characters (which needs to be 3 *
// MAXMAPLEN) for the Amiga).
#define TYPELEN_INIT (5 * (MAXMAPLEN + 3))
static char_u typebuf_init[TYPELEN_INIT]; // initial typebuf.tb_buf
static char_u noremapbuf_init[TYPELEN_INIT]; // initial typebuf.tb_noremap
static int last_recorded_len = 0; // number of last recorded chars
static int read_readbuf(buffheader_T *buf, int advance);
static void init_typebuf(void);
static void may_sync_undo(void);
static void free_typebuf(void);
static void closescript(void);
static void updatescript(int c);
static int vgetorpeek(int);
static int inchar(char_u *buf, int maxlen, long wait_time);
/*
* Free and clear a buffer.
*/
void
free_buff(buffheader_T *buf)
{
buffblock_T *p, *np;
for (p = buf->bh_first.b_next; p != NULL; p = np)
{
np = p->b_next;
vim_free(p);
}
buf->bh_first.b_next = NULL;
}
/*
* Return the contents of a buffer as a single string.
* K_SPECIAL and CSI in the returned string are escaped.
*/
static char_u *
get_buffcont(
buffheader_T *buffer,
int dozero) // count == zero is not an error
{
long_u count = 0;
char_u *p = NULL;
char_u *p2;
char_u *str;
buffblock_T *bp;
// compute the total length of the string
for (bp = buffer->bh_first.b_next; bp != NULL; bp = bp->b_next)
count += (long_u)STRLEN(bp->b_str);
if ((count || dozero) && (p = alloc(count + 1)) != NULL)
{
p2 = p;
for (bp = buffer->bh_first.b_next; bp != NULL; bp = bp->b_next)
for (str = bp->b_str; *str; )
*p2++ = *str++;
*p2 = NUL;
}
return (p);
}
/*
* Return the contents of the record buffer as a single string
* and clear the record buffer.
* K_SPECIAL and CSI in the returned string are escaped.
*/
char_u *
get_recorded(void)
{
char_u *p;
size_t len;
p = get_buffcont(&recordbuff, TRUE);
free_buff(&recordbuff);
/*
* Remove the characters that were added the last time, these must be the
* (possibly mapped) characters that stopped the recording.
*/
len = STRLEN(p);
if ((int)len >= last_recorded_len)
{
len -= last_recorded_len;
p[len] = NUL;
}
/*
* When stopping recording from Insert mode with CTRL-O q, also remove the
* CTRL-O.
*/
if (len > 0 && restart_edit != 0 && p[len - 1] == Ctrl_O)
p[len - 1] = NUL;
return (p);
}
/*
* Return the contents of the redo buffer as a single string.
* K_SPECIAL and CSI in the returned string are escaped.
*/
char_u *
get_inserted(void)
{
return get_buffcont(&redobuff, FALSE);
}
/*
* Add string "s" after the current block of buffer "buf".
* K_SPECIAL and CSI should have been escaped already.
*/
static void
add_buff(
buffheader_T *buf,
char_u *s,
long slen) // length of "s" or -1
{
buffblock_T *p;
long_u len;
if (slen < 0)
slen = (long)STRLEN(s);
if (slen == 0) // don't add empty strings
return;
if (buf->bh_first.b_next == NULL) // first add to list
{
buf->bh_space = 0;
buf->bh_curr = &(buf->bh_first);
}
else if (buf->bh_curr == NULL) // buffer has already been read
{
iemsg(_("E222: Add to read buffer"));
return;
}
else if (buf->bh_index != 0)
mch_memmove(buf->bh_first.b_next->b_str,
buf->bh_first.b_next->b_str + buf->bh_index,
STRLEN(buf->bh_first.b_next->b_str + buf->bh_index) + 1);
buf->bh_index = 0;
if (buf->bh_space >= (int)slen)
{
len = (long_u)STRLEN(buf->bh_curr->b_str);
vim_strncpy(buf->bh_curr->b_str + len, s, (size_t)slen);
buf->bh_space -= slen;
}
else
{
if (slen < MINIMAL_SIZE)
len = MINIMAL_SIZE;
else
len = slen;
p = alloc(offsetof(buffblock_T, b_str) + len + 1);
if (p == NULL)
return; // no space, just forget it
buf->bh_space = (int)(len - slen);
vim_strncpy(p->b_str, s, (size_t)slen);
p->b_next = buf->bh_curr->b_next;
buf->bh_curr->b_next = p;
buf->bh_curr = p;
}
return;
}
/*
* Add number "n" to buffer "buf".
*/
static void
add_num_buff(buffheader_T *buf, long n)
{
char_u number[32];
sprintf((char *)number, "%ld", n);
add_buff(buf, number, -1L);
}
/*
* Add character 'c' to buffer "buf".
* Translates special keys, NUL, CSI, K_SPECIAL and multibyte characters.
*/
static void
add_char_buff(buffheader_T *buf, int c)
{
char_u bytes[MB_MAXBYTES + 1];
int len;
int i;
char_u temp[4];
if (IS_SPECIAL(c))
len = 1;
else
len = (*mb_char2bytes)(c, bytes);
for (i = 0; i < len; ++i)
{
if (!IS_SPECIAL(c))
c = bytes[i];
if (IS_SPECIAL(c) || c == K_SPECIAL || c == NUL)
{
// translate special key code into three byte sequence
temp[0] = K_SPECIAL;
temp[1] = K_SECOND(c);
temp[2] = K_THIRD(c);
temp[3] = NUL;
}
#ifdef FEAT_GUI
else if (c == CSI)
{
// Translate a CSI to a CSI - KS_EXTRA - KE_CSI sequence
temp[0] = CSI;
temp[1] = KS_EXTRA;
temp[2] = (int)KE_CSI;
temp[3] = NUL;
}
#endif
else
{
temp[0] = c;
temp[1] = NUL;
}
add_buff(buf, temp, -1L);
}
}
// First read ahead buffer. Used for translated commands.
static buffheader_T readbuf1 = {{NULL, {NUL}}, NULL, 0, 0};
// Second read ahead buffer. Used for redo.
static buffheader_T readbuf2 = {{NULL, {NUL}}, NULL, 0, 0};
/*
* Get one byte from the read buffers. Use readbuf1 one first, use readbuf2
* if that one is empty.
* If advance == TRUE go to the next char.
* No translation is done K_SPECIAL and CSI are escaped.
*/
static int
read_readbuffers(int advance)
{
int c;
c = read_readbuf(&readbuf1, advance);
if (c == NUL)
c = read_readbuf(&readbuf2, advance);
return c;
}
static int
read_readbuf(buffheader_T *buf, int advance)
{
char_u c;
buffblock_T *curr;
if (buf->bh_first.b_next == NULL) // buffer is empty
return NUL;
curr = buf->bh_first.b_next;
c = curr->b_str[buf->bh_index];
if (advance)
{
if (curr->b_str[++buf->bh_index] == NUL)
{
buf->bh_first.b_next = curr->b_next;
vim_free(curr);
buf->bh_index = 0;
}
}
return c;
}
/*
* Prepare the read buffers for reading (if they contain something).
*/
static void
start_stuff(void)
{
if (readbuf1.bh_first.b_next != NULL)
{
readbuf1.bh_curr = &(readbuf1.bh_first);
readbuf1.bh_space = 0;
}
if (readbuf2.bh_first.b_next != NULL)
{
readbuf2.bh_curr = &(readbuf2.bh_first);
readbuf2.bh_space = 0;
}
}
/*
* Return TRUE if the stuff buffer is empty.
*/
int
stuff_empty(void)
{
return (readbuf1.bh_first.b_next == NULL
&& readbuf2.bh_first.b_next == NULL);
}
#if defined(FEAT_EVAL) || defined(PROTO)
/*
* Return TRUE if readbuf1 is empty. There may still be redo characters in
* redbuf2.
*/
int
readbuf1_empty(void)
{
return (readbuf1.bh_first.b_next == NULL);
}
#endif
/*
* Set a typeahead character that won't be flushed.
*/
void
typeahead_noflush(int c)
{
typeahead_char = c;
}
/*
* Remove the contents of the stuff buffer and the mapped characters in the
* typeahead buffer (used in case of an error). If "flush_typeahead" is true,
* flush all typeahead characters (used when interrupted by a CTRL-C).
*/
void
flush_buffers(flush_buffers_T flush_typeahead)
{
init_typebuf();
start_stuff();
while (read_readbuffers(TRUE) != NUL)
;
if (flush_typeahead == FLUSH_MINIMAL)
{
// remove mapped characters at the start only
typebuf.tb_off += typebuf.tb_maplen;
typebuf.tb_len -= typebuf.tb_maplen;
}
else
{
// remove typeahead
if (flush_typeahead == FLUSH_INPUT)
// We have to get all characters, because we may delete the first
// part of an escape sequence. In an xterm we get one char at a
// time and we have to get them all.
while (inchar(typebuf.tb_buf, typebuf.tb_buflen - 1, 10L) != 0)
;
typebuf.tb_off = MAXMAPLEN;
typebuf.tb_len = 0;
#if defined(FEAT_CLIENTSERVER) || defined(FEAT_EVAL)
// Reset the flag that text received from a client or from feedkeys()
// was inserted in the typeahead buffer.
typebuf_was_filled = FALSE;
#endif
}
typebuf.tb_maplen = 0;
typebuf.tb_silent = 0;
cmd_silent = FALSE;
typebuf.tb_no_abbr_cnt = 0;
}
/*
* The previous contents of the redo buffer is kept in old_redobuffer.
* This is used for the CTRL-O <.> command in insert mode.
*/
void
ResetRedobuff(void)
{
if (!block_redo)
{
free_buff(&old_redobuff);
old_redobuff = redobuff;
redobuff.bh_first.b_next = NULL;
}
}
/*
* Discard the contents of the redo buffer and restore the previous redo
* buffer.
*/
void
CancelRedo(void)
{
if (!block_redo)
{
free_buff(&redobuff);
redobuff = old_redobuff;
old_redobuff.bh_first.b_next = NULL;
start_stuff();
while (read_readbuffers(TRUE) != NUL)
;
}
}
/*
* Save redobuff and old_redobuff to save_redobuff and save_old_redobuff.
* Used before executing autocommands and user functions.
*/
void
saveRedobuff(save_redo_T *save_redo)
{
char_u *s;
save_redo->sr_redobuff = redobuff;
redobuff.bh_first.b_next = NULL;
save_redo->sr_old_redobuff = old_redobuff;
old_redobuff.bh_first.b_next = NULL;
// Make a copy, so that ":normal ." in a function works.
s = get_buffcont(&save_redo->sr_redobuff, FALSE);
if (s != NULL)
{
add_buff(&redobuff, s, -1L);
vim_free(s);
}
}
/*
* Restore redobuff and old_redobuff from save_redobuff and save_old_redobuff.
* Used after executing autocommands and user functions.
*/
void
restoreRedobuff(save_redo_T *save_redo)
{
free_buff(&redobuff);
redobuff = save_redo->sr_redobuff;
free_buff(&old_redobuff);
old_redobuff = save_redo->sr_old_redobuff;
}
/*
* Append "s" to the redo buffer.
* K_SPECIAL and CSI should already have been escaped.
*/
void
AppendToRedobuff(char_u *s)
{
if (!block_redo)
add_buff(&redobuff, s, -1L);
}
/*
* Append to Redo buffer literally, escaping special characters with CTRL-V.
* K_SPECIAL and CSI are escaped as well.
*/
void
AppendToRedobuffLit(
char_u *str,
int len) // length of "str" or -1 for up to the NUL
{
char_u *s = str;
int c;
char_u *start;
if (block_redo)
return;
while (len < 0 ? *s != NUL : s - str < len)
{
// Put a string of normal characters in the redo buffer (that's
// faster).
start = s;
while (*s >= ' '
#ifndef EBCDIC
&& *s < DEL // EBCDIC: all chars above space are normal
#endif
&& (len < 0 || s - str < len))
++s;
// Don't put '0' or '^' as last character, just in case a CTRL-D is
// typed next.
if (*s == NUL && (s[-1] == '0' || s[-1] == '^'))
--s;
if (s > start)
add_buff(&redobuff, start, (long)(s - start));
if (*s == NUL || (len >= 0 && s - str >= len))
break;
// Handle a special or multibyte character.
if (has_mbyte)
// Handle composing chars separately.
c = mb_cptr2char_adv(&s);
else
c = *s++;
if (c < ' ' || c == DEL || (*s == NUL && (c == '0' || c == '^')))
add_char_buff(&redobuff, Ctrl_V);
// CTRL-V '0' must be inserted as CTRL-V 048 (EBCDIC: xf0)
if (*s == NUL && c == '0')
#ifdef EBCDIC
add_buff(&redobuff, (char_u *)"xf0", 3L);
#else
add_buff(&redobuff, (char_u *)"048", 3L);
#endif
else
add_char_buff(&redobuff, c);
}
}
/*
* Append a character to the redo buffer.
* Translates special keys, NUL, CSI, K_SPECIAL and multibyte characters.
*/
void
AppendCharToRedobuff(int c)
{
if (!block_redo)
add_char_buff(&redobuff, c);
}
/*
* Append a number to the redo buffer.
*/
void
AppendNumberToRedobuff(long n)
{
if (!block_redo)
add_num_buff(&redobuff, n);
}
/*
* Append string "s" to the stuff buffer.
* CSI and K_SPECIAL must already have been escaped.
*/
void
stuffReadbuff(char_u *s)
{
add_buff(&readbuf1, s, -1L);
}
/*
* Append string "s" to the redo stuff buffer.
* CSI and K_SPECIAL must already have been escaped.
*/
void
stuffRedoReadbuff(char_u *s)
{
add_buff(&readbuf2, s, -1L);
}
void
stuffReadbuffLen(char_u *s, long len)
{
add_buff(&readbuf1, s, len);
}
#if defined(FEAT_EVAL) || defined(PROTO)
/*
* Stuff "s" into the stuff buffer, leaving special key codes unmodified and
* escaping other K_SPECIAL and CSI bytes.
* Change CR, LF and ESC into a space.
*/
void
stuffReadbuffSpec(char_u *s)
{
int c;
while (*s != NUL)
{
if (*s == K_SPECIAL && s[1] != NUL && s[2] != NUL)
{
// Insert special key literally.
stuffReadbuffLen(s, 3L);
s += 3;
}
else
{
c = mb_ptr2char_adv(&s);
if (c == CAR || c == NL || c == ESC)
c = ' ';
stuffcharReadbuff(c);
}
}
}
#endif
/*
* Append a character to the stuff buffer.
* Translates special keys, NUL, CSI, K_SPECIAL and multibyte characters.
*/
void
stuffcharReadbuff(int c)
{
add_char_buff(&readbuf1, c);
}
/*
* Append a number to the stuff buffer.
*/
void
stuffnumReadbuff(long n)
{
add_num_buff(&readbuf1, n);
}
/*
* Read a character from the redo buffer. Translates K_SPECIAL, CSI and
* multibyte characters.
* The redo buffer is left as it is.
* If init is TRUE, prepare for redo, return FAIL if nothing to redo, OK
* otherwise.
* If old is TRUE, use old_redobuff instead of redobuff.
*/
static int
read_redo(int init, int old_redo)
{
static buffblock_T *bp;
static char_u *p;
int c;
int n;
char_u buf[MB_MAXBYTES + 1];
int i;
if (init)
{
if (old_redo)
bp = old_redobuff.bh_first.b_next;
else
bp = redobuff.bh_first.b_next;
if (bp == NULL)
return FAIL;
p = bp->b_str;
return OK;
}
if ((c = *p) != NUL)
{
// Reverse the conversion done by add_char_buff()
// For a multi-byte character get all the bytes and return the
// converted character.
if (has_mbyte && (c != K_SPECIAL || p[1] == KS_SPECIAL))
n = MB_BYTE2LEN_CHECK(c);
else
n = 1;
for (i = 0; ; ++i)
{
if (c == K_SPECIAL) // special key or escaped K_SPECIAL
{
c = TO_SPECIAL(p[1], p[2]);
p += 2;
}
#ifdef FEAT_GUI
if (c == CSI) // escaped CSI
p += 2;
#endif
if (*++p == NUL && bp->b_next != NULL)
{
bp = bp->b_next;
p = bp->b_str;
}
buf[i] = c;
if (i == n - 1) // last byte of a character
{
if (n != 1)
c = (*mb_ptr2char)(buf);
break;
}
c = *p;
if (c == NUL) // cannot happen?
break;
}
}
return c;
}
/*
* Copy the rest of the redo buffer into the stuff buffer (in a slow way).
* If old_redo is TRUE, use old_redobuff instead of redobuff.
* The escaped K_SPECIAL and CSI are copied without translation.
*/
static void
copy_redo(int old_redo)
{
int c;
while ((c = read_redo(FALSE, old_redo)) != NUL)
add_char_buff(&readbuf2, c);
}
/*
* Stuff the redo buffer into readbuf2.
* Insert the redo count into the command.
* If "old_redo" is TRUE, the last but one command is repeated
* instead of the last command (inserting text). This is used for
* CTRL-O <.> in insert mode
*
* return FAIL for failure, OK otherwise
*/
int
start_redo(long count, int old_redo)
{
int c;
// init the pointers; return if nothing to redo
if (read_redo(TRUE, old_redo) == FAIL)
return FAIL;
c = read_redo(FALSE, old_redo);
// copy the buffer name, if present
if (c == '"')
{
add_buff(&readbuf2, (char_u *)"\"", 1L);
c = read_redo(FALSE, old_redo);
// if a numbered buffer is used, increment the number
if (c >= '1' && c < '9')
++c;
add_char_buff(&readbuf2, c);
// the expression register should be re-evaluated
if (c == '=')
{
add_char_buff(&readbuf2, CAR);
cmd_silent = TRUE;
}
c = read_redo(FALSE, old_redo);
}
if (c == 'v') // redo Visual
{
VIsual = curwin->w_cursor;
VIsual_active = TRUE;
VIsual_select = FALSE;
VIsual_reselect = TRUE;
redo_VIsual_busy = TRUE;
c = read_redo(FALSE, old_redo);
}
// try to enter the count (in place of a previous count)
if (count)
{
while (VIM_ISDIGIT(c)) // skip "old" count
c = read_redo(FALSE, old_redo);
add_num_buff(&readbuf2, count);
}
// copy from the redo buffer into the stuff buffer
add_char_buff(&readbuf2, c);
copy_redo(old_redo);
return OK;
}
/*
* Repeat the last insert (R, o, O, a, A, i or I command) by stuffing
* the redo buffer into readbuf2.
* return FAIL for failure, OK otherwise
*/
int
start_redo_ins(void)
{
int c;
if (read_redo(TRUE, FALSE) == FAIL)
return FAIL;
start_stuff();
// skip the count and the command character
while ((c = read_redo(FALSE, FALSE)) != NUL)
{
if (vim_strchr((char_u *)"AaIiRrOo", c) != NULL)
{
if (c == 'O' || c == 'o')
add_buff(&readbuf2, NL_STR, -1L);
break;
}
}
// copy the typed text from the redo buffer into the stuff buffer
copy_redo(FALSE);
block_redo = TRUE;
return OK;
}
void
stop_redo_ins(void)
{
block_redo = FALSE;
}
/*
* Initialize typebuf.tb_buf to point to typebuf_init.
* alloc() cannot be used here: In out-of-memory situations it would
* be impossible to type anything.
*/
static void
init_typebuf(void)
{
if (typebuf.tb_buf == NULL)
{
typebuf.tb_buf = typebuf_init;
typebuf.tb_noremap = noremapbuf_init;
typebuf.tb_buflen = TYPELEN_INIT;
typebuf.tb_len = 0;
typebuf.tb_off = MAXMAPLEN + 4;
typebuf.tb_change_cnt = 1;
}
}
/*
* Returns TRUE when keys cannot be remapped.
*/
int
noremap_keys(void)
{
return KeyNoremap & (RM_NONE|RM_SCRIPT);
}
/*
* Insert a string in position 'offset' in the typeahead buffer (for "@r"
* and ":normal" command, vgetorpeek() and check_termcode()).
*
* If noremap is REMAP_YES, new string can be mapped again.
* If noremap is REMAP_NONE, new string cannot be mapped again.
* If noremap is REMAP_SKIP, fist char of new string cannot be mapped again,
* but abbreviations are allowed.
* If noremap is REMAP_SCRIPT, new string cannot be mapped again, except for
* script-local mappings.
* If noremap is > 0, that many characters of the new string cannot be mapped.
*
* If nottyped is TRUE, the string does not return KeyTyped (don't use when
* offset is non-zero!).
*
* If silent is TRUE, cmd_silent is set when the characters are obtained.
*
* return FAIL for failure, OK otherwise
*/
int
ins_typebuf(
char_u *str,
int noremap,
int offset,
int nottyped,
int silent)
{
char_u *s1, *s2;
int newlen;
int addlen;
int i;
int newoff;
int val;
int nrm;
init_typebuf();
if (++typebuf.tb_change_cnt == 0)
typebuf.tb_change_cnt = 1;
state_no_longer_safe("ins_typebuf()");
addlen = (int)STRLEN(str);
if (offset == 0 && addlen <= typebuf.tb_off)
{
/*
* Easy case: there is room in front of typebuf.tb_buf[typebuf.tb_off]
*/
typebuf.tb_off -= addlen;
mch_memmove(typebuf.tb_buf + typebuf.tb_off, str, (size_t)addlen);
}
else if (typebuf.tb_len == 0 && typebuf.tb_buflen
>= addlen + 3 * (MAXMAPLEN + 4))
{
/*
* Buffer is empty and string fits in the existing buffer.
* Leave some space before and after, if possible.
*/
typebuf.tb_off = (typebuf.tb_buflen - addlen - 3 * (MAXMAPLEN + 4)) / 2;
mch_memmove(typebuf.tb_buf + typebuf.tb_off, str, (size_t)addlen);
}
else
{
/*
* Need to allocate a new buffer.
* In typebuf.tb_buf there must always be room for 3 * (MAXMAPLEN + 4)
* characters. We add some extra room to avoid having to allocate too
* often.
*/
newoff = MAXMAPLEN + 4;
newlen = typebuf.tb_len + addlen + newoff + 4 * (MAXMAPLEN + 4);
if (newlen < 0) // string is getting too long
{
emsg(_(e_toocompl)); // also calls flush_buffers
setcursor();
return FAIL;
}
s1 = alloc(newlen);
if (s1 == NULL) // out of memory
return FAIL;
s2 = alloc(newlen);
if (s2 == NULL) // out of memory
{
vim_free(s1);
return FAIL;
}
typebuf.tb_buflen = newlen;
// copy the old chars, before the insertion point
mch_memmove(s1 + newoff, typebuf.tb_buf + typebuf.tb_off,
(size_t)offset);
// copy the new chars
mch_memmove(s1 + newoff + offset, str, (size_t)addlen);
// copy the old chars, after the insertion point, including the NUL at
// the end
mch_memmove(s1 + newoff + offset + addlen,
typebuf.tb_buf + typebuf.tb_off + offset,
(size_t)(typebuf.tb_len - offset + 1));
if (typebuf.tb_buf != typebuf_init)
vim_free(typebuf.tb_buf);
typebuf.tb_buf = s1;
mch_memmove(s2 + newoff, typebuf.tb_noremap + typebuf.tb_off,
(size_t)offset);
mch_memmove(s2 + newoff + offset + addlen,
typebuf.tb_noremap + typebuf.tb_off + offset,
(size_t)(typebuf.tb_len - offset));
if (typebuf.tb_noremap != noremapbuf_init)
vim_free(typebuf.tb_noremap);
typebuf.tb_noremap = s2;
typebuf.tb_off = newoff;
}
typebuf.tb_len += addlen;
// If noremap == REMAP_SCRIPT: do remap script-local mappings.
if (noremap == REMAP_SCRIPT)
val = RM_SCRIPT;
else if (noremap == REMAP_SKIP)
val = RM_ABBR;
else
val = RM_NONE;
/*
* Adjust typebuf.tb_noremap[] for the new characters:
* If noremap == REMAP_NONE or REMAP_SCRIPT: new characters are
* (sometimes) not remappable
* If noremap == REMAP_YES: all the new characters are mappable
* If noremap > 0: "noremap" characters are not remappable, the rest
* mappable
*/
if (noremap == REMAP_SKIP)
nrm = 1;
else if (noremap < 0)
nrm = addlen;
else
nrm = noremap;
for (i = 0; i < addlen; ++i)
typebuf.tb_noremap[typebuf.tb_off + i + offset] =
(--nrm >= 0) ? val : RM_YES;
// tb_maplen and tb_silent only remember the length of mapped and/or
// silent mappings at the start of the buffer, assuming that a mapped
// sequence doesn't result in typed characters.
if (nottyped || typebuf.tb_maplen > offset)
typebuf.tb_maplen += addlen;
if (silent || typebuf.tb_silent > offset)
{
typebuf.tb_silent += addlen;
cmd_silent = TRUE;
}
if (typebuf.tb_no_abbr_cnt && offset == 0) // and not used for abbrev.s
typebuf.tb_no_abbr_cnt += addlen;
return OK;
}
/*
* Put character "c" back into the typeahead buffer.
* Can be used for a character obtained by vgetc() that needs to be put back.
* Uses cmd_silent, KeyTyped and KeyNoremap to restore the flags belonging to
* the char.
*/
void
ins_char_typebuf(int c)
{
char_u buf[MB_MAXBYTES + 1];
if (IS_SPECIAL(c))
{
buf[0] = K_SPECIAL;
buf[1] = K_SECOND(c);
buf[2] = K_THIRD(c);
buf[3] = NUL;
}
else
buf[(*mb_char2bytes)(c, buf)] = NUL;
(void)ins_typebuf(buf, KeyNoremap, 0, !KeyTyped, cmd_silent);
}
/*
* Return TRUE if the typeahead buffer was changed (while waiting for a
* character to arrive). Happens when a message was received from a client or
* from feedkeys().
* But check in a more generic way to avoid trouble: When "typebuf.tb_buf"
* changed it was reallocated and the old pointer can no longer be used.
* Or "typebuf.tb_off" may have been changed and we would overwrite characters
* that was just added.
*/
int
typebuf_changed(
int tb_change_cnt) // old value of typebuf.tb_change_cnt
{
return (tb_change_cnt != 0 && (typebuf.tb_change_cnt != tb_change_cnt
#if defined(FEAT_CLIENTSERVER) || defined(FEAT_EVAL)
|| typebuf_was_filled
#endif
));
}
/*
* Return TRUE if there are no characters in the typeahead buffer that have
* not been typed (result from a mapping or come from ":normal").
*/
int
typebuf_typed(void)
{
return typebuf.tb_maplen == 0;
}
/*
* Return the number of characters that are mapped (or not typed).
*/
int
typebuf_maplen(void)
{
return typebuf.tb_maplen;
}
/*
* remove "len" characters from typebuf.tb_buf[typebuf.tb_off + offset]
*/
void
del_typebuf(int len, int offset)
{
int i;
if (len == 0)
return; // nothing to do
typebuf.tb_len -= len;
/*
* Easy case: Just increase typebuf.tb_off.
*/
if (offset == 0 && typebuf.tb_buflen - (typebuf.tb_off + len)
>= 3 * MAXMAPLEN + 3)
typebuf.tb_off += len;
/*
* Have to move the characters in typebuf.tb_buf[] and typebuf.tb_noremap[]
*/
else
{
i = typebuf.tb_off + offset;
/*
* Leave some extra room at the end to avoid reallocation.
*/
if (typebuf.tb_off > MAXMAPLEN)
{
mch_memmove(typebuf.tb_buf + MAXMAPLEN,
typebuf.tb_buf + typebuf.tb_off, (size_t)offset);
mch_memmove(typebuf.tb_noremap + MAXMAPLEN,
typebuf.tb_noremap + typebuf.tb_off, (size_t)offset);
typebuf.tb_off = MAXMAPLEN;
}
// adjust typebuf.tb_buf (include the NUL at the end)
mch_memmove(typebuf.tb_buf + typebuf.tb_off + offset,
typebuf.tb_buf + i + len,
(size_t)(typebuf.tb_len - offset + 1));
// adjust typebuf.tb_noremap[]
mch_memmove(typebuf.tb_noremap + typebuf.tb_off + offset,
typebuf.tb_noremap + i + len,
(size_t)(typebuf.tb_len - offset));
}
if (typebuf.tb_maplen > offset) // adjust tb_maplen
{
if (typebuf.tb_maplen < offset + len)
typebuf.tb_maplen = offset;
else
typebuf.tb_maplen -= len;
}
if (typebuf.tb_silent > offset) // adjust tb_silent
{
if (typebuf.tb_silent < offset + len)
typebuf.tb_silent = offset;
else
typebuf.tb_silent -= len;
}
if (typebuf.tb_no_abbr_cnt > offset) // adjust tb_no_abbr_cnt
{
if (typebuf.tb_no_abbr_cnt < offset + len)
typebuf.tb_no_abbr_cnt = offset;
else
typebuf.tb_no_abbr_cnt -= len;
}
#if defined(FEAT_CLIENTSERVER) || defined(FEAT_EVAL)
// Reset the flag that text received from a client or from feedkeys()
// was inserted in the typeahead buffer.
typebuf_was_filled = FALSE;
#endif
if (++typebuf.tb_change_cnt == 0)
typebuf.tb_change_cnt = 1;
}
/*
* Write typed characters to script file.
* If recording is on put the character in the recordbuffer.
*/
static void
gotchars(char_u *chars, int len)
{
char_u *s = chars;
int i;
static char_u buf[4];
static int buflen = 0;
int todo = len;
while (todo--)
{
buf[buflen++] = *s++;
// When receiving a special key sequence, store it until we have all
// the bytes and we can decide what to do with it.
if (buflen == 1 && buf[0] == K_SPECIAL)
continue;
if (buflen == 2)
continue;
if (buflen == 3 && buf[1] == KS_EXTRA
&& (buf[2] == KE_FOCUSGAINED || buf[2] == KE_FOCUSLOST))
{
// Drop K_FOCUSGAINED and K_FOCUSLOST, they are not useful in a
// recording.
buflen = 0;
continue;
}
// Handle one byte at a time; no translation to be done.
for (i = 0; i < buflen; ++i)
updatescript(buf[i]);
if (reg_recording != 0)
{
buf[buflen] = NUL;
add_buff(&recordbuff, buf, (long)buflen);
// remember how many chars were last recorded
last_recorded_len += buflen;
}
buflen = 0;
}
may_sync_undo();
#ifdef FEAT_EVAL
// output "debug mode" message next time in debug mode
debug_did_msg = FALSE;
#endif
// Since characters have been typed, consider the following to be in
// another mapping. Search string will be kept in history.
++maptick;
}
/*
* Sync undo. Called when typed characters are obtained from the typeahead
* buffer, or when a menu is used.
* Do not sync:
* - In Insert mode, unless cursor key has been used.
* - While reading a script file.
* - When no_u_sync is non-zero.
*/
static void
may_sync_undo(void)
{
if ((!(State & (INSERT + CMDLINE)) || arrow_used)
&& scriptin[curscript] == NULL)
u_sync(FALSE);
}
/*
* Make "typebuf" empty and allocate new buffers.
* Returns FAIL when out of memory.
*/
static int
alloc_typebuf(void)
{
typebuf.tb_buf = alloc(TYPELEN_INIT);
typebuf.tb_noremap = alloc(TYPELEN_INIT);
if (typebuf.tb_buf == NULL || typebuf.tb_noremap == NULL)
{
free_typebuf();
return FAIL;
}
typebuf.tb_buflen = TYPELEN_INIT;
typebuf.tb_off = MAXMAPLEN + 4; // can insert without realloc
typebuf.tb_len = 0;
typebuf.tb_maplen = 0;
typebuf.tb_silent = 0;
typebuf.tb_no_abbr_cnt = 0;
if (++typebuf.tb_change_cnt == 0)
typebuf.tb_change_cnt = 1;
return OK;
}
/*
* Free the buffers of "typebuf".
*/
static void
free_typebuf(void)
{
if (typebuf.tb_buf == typebuf_init)
internal_error("Free typebuf 1");
else
VIM_CLEAR(typebuf.tb_buf);
if (typebuf.tb_noremap == noremapbuf_init)
internal_error("Free typebuf 2");
else
VIM_CLEAR(typebuf.tb_noremap);
}
/*
* When doing ":so! file", the current typeahead needs to be saved, and
* restored when "file" has been read completely.
*/
static typebuf_T saved_typebuf[NSCRIPT];
int
save_typebuf(void)
{
init_typebuf();
saved_typebuf[curscript] = typebuf;
// If out of memory: restore typebuf and close file.
if (alloc_typebuf() == FAIL)
{
closescript();
return FAIL;
}
return OK;
}
static int old_char = -1; // character put back by vungetc()
static int old_mod_mask; // mod_mask for ungotten character
static int old_mouse_row; // mouse_row related to old_char
static int old_mouse_col; // mouse_col related to old_char
/*
* Save all three kinds of typeahead, so that the user must type at a prompt.
*/
void
save_typeahead(tasave_T *tp)
{
tp->save_typebuf = typebuf;
tp->typebuf_valid = (alloc_typebuf() == OK);
if (!tp->typebuf_valid)
typebuf = tp->save_typebuf;
tp->old_char = old_char;
tp->old_mod_mask = old_mod_mask;
old_char = -1;
tp->save_readbuf1 = readbuf1;
readbuf1.bh_first.b_next = NULL;
tp->save_readbuf2 = readbuf2;
readbuf2.bh_first.b_next = NULL;
# ifdef USE_INPUT_BUF
tp->save_inputbuf = get_input_buf();
# endif
}
/*
* Restore the typeahead to what it was before calling save_typeahead().
* The allocated memory is freed, can only be called once!
*/
void
restore_typeahead(tasave_T *tp)
{
if (tp->typebuf_valid)
{
free_typebuf();
typebuf = tp->save_typebuf;
}
old_char = tp->old_char;
old_mod_mask = tp->old_mod_mask;
free_buff(&readbuf1);
readbuf1 = tp->save_readbuf1;
free_buff(&readbuf2);
readbuf2 = tp->save_readbuf2;
# ifdef USE_INPUT_BUF
set_input_buf(tp->save_inputbuf);
# endif
}
/*
* Open a new script file for the ":source!" command.
*/
void
openscript(
char_u *name,
int directly) // when TRUE execute directly
{
if (curscript + 1 == NSCRIPT)
{
emsg(_(e_nesting));
return;
}
// Disallow sourcing a file in the sandbox, the commands would be executed
// later, possibly outside of the sandbox.
if (check_secure())
return;
#ifdef FEAT_EVAL
if (ignore_script)
// Not reading from script, also don't open one. Warning message?
return;
#endif
if (scriptin[curscript] != NULL) // already reading script
++curscript;
// use NameBuff for expanded name
expand_env(name, NameBuff, MAXPATHL);
if ((scriptin[curscript] = mch_fopen((char *)NameBuff, READBIN)) == NULL)
{
semsg(_(e_notopen), name);
if (curscript)
--curscript;
return;
}
if (save_typebuf() == FAIL)
return;
/*
* Execute the commands from the file right now when using ":source!"
* after ":global" or ":argdo" or in a loop. Also when another command
* follows. This means the display won't be updated. Don't do this
* always, "make test" would fail.
*/
if (directly)
{
oparg_T oa;
int oldcurscript;
int save_State = State;
int save_restart_edit = restart_edit;
int save_insertmode = p_im;
int save_finish_op = finish_op;
int save_msg_scroll = msg_scroll;
State = NORMAL;
msg_scroll = FALSE; // no msg scrolling in Normal mode
restart_edit = 0; // don't go to Insert mode
p_im = FALSE; // don't use 'insertmode'
clear_oparg(&oa);
finish_op = FALSE;
oldcurscript = curscript;
do
{
update_topline_cursor(); // update cursor position and topline
normal_cmd(&oa, FALSE); // execute one command
vpeekc(); // check for end of file
}
while (scriptin[oldcurscript] != NULL);
State = save_State;
msg_scroll = save_msg_scroll;
restart_edit = save_restart_edit;
p_im = save_insertmode;
finish_op = save_finish_op;
}
}
/*
* Close the currently active input script.
*/
static void
closescript(void)
{
free_typebuf();
typebuf = saved_typebuf[curscript];
fclose(scriptin[curscript]);
scriptin[curscript] = NULL;
if (curscript > 0)
--curscript;
}
#if defined(EXITFREE) || defined(PROTO)
void
close_all_scripts(void)
{
while (scriptin[0] != NULL)
closescript();
}
#endif
/*
* Return TRUE when reading keys from a script file.
*/
int
using_script(void)
{
return scriptin[curscript] != NULL;
}
/*
* This function is called just before doing a blocking wait. Thus after
* waiting 'updatetime' for a character to arrive.
*/
void
before_blocking(void)
{
updatescript(0);
#ifdef FEAT_EVAL
if (may_garbage_collect)
garbage_collect(FALSE);
#endif
}
/*
* updatescript() is called when a character can be written into the script file
* or when we have waited some time for a character (c == 0)
*
* All the changed memfiles are synced if c == 0 or when the number of typed
* characters reaches 'updatecount' and 'updatecount' is non-zero.
*/
static void
updatescript(int c)
{
static int count = 0;
if (c && scriptout)
putc(c, scriptout);
if (c == 0 || (p_uc > 0 && ++count >= p_uc))
{
ml_sync_all(c == 0, TRUE);
count = 0;
}
}
/*
* Convert "c" plus "mod_mask" to merge the effect of modifyOtherKeys into the
* character.
*/
int
merge_modifyOtherKeys(int c_arg)
{
int c = c_arg;
if (mod_mask & MOD_MASK_CTRL)
{
if ((c >= '`' && c <= 0x7f) || (c >= '@' && c <= '_'))
{
c &= 0x1f;
mod_mask &= ~MOD_MASK_CTRL;
}
else if (c == '6')
{
// CTRL-6 is equivalent to CTRL-^
c = 0x1e;
mod_mask &= ~MOD_MASK_CTRL;
}
}
if ((mod_mask & (MOD_MASK_META | MOD_MASK_ALT))
&& c >= 0 && c <= 127)
{
c += 0x80;
mod_mask &= ~(MOD_MASK_META|MOD_MASK_ALT);
}
return c;
}
/*
* Get the next input character.
* Can return a special key or a multi-byte character.
* Can return NUL when called recursively, use safe_vgetc() if that's not
* wanted.
* This translates escaped K_SPECIAL and CSI bytes to a K_SPECIAL or CSI byte.
* Collects the bytes of a multibyte character into the whole character.
* Returns the modifiers in the global "mod_mask".
*/
int
vgetc(void)
{
int c, c2;
int n;
char_u buf[MB_MAXBYTES + 1];
int i;
#ifdef FEAT_EVAL
// Do garbage collection when garbagecollect() was called previously and
// we are now at the toplevel.
if (may_garbage_collect && want_garbage_collect)
garbage_collect(FALSE);
#endif
/*
* If a character was put back with vungetc, it was already processed.
* Return it directly.
*/
if (old_char != -1)
{
c = old_char;
old_char = -1;
mod_mask = old_mod_mask;
mouse_row = old_mouse_row;
mouse_col = old_mouse_col;
}
else
{
mod_mask = 0x0;
last_recorded_len = 0;
for (;;) // this is done twice if there are modifiers
{
int did_inc = FALSE;
if (mod_mask
#if defined(FEAT_XIM) && defined(FEAT_GUI_GTK)
|| im_is_preediting()
#endif
#if defined(FEAT_PROP_POPUP)
|| popup_no_mapping()
#endif
)
{
// no mapping after modifier has been read
++no_mapping;
++allow_keys;
did_inc = TRUE; // mod_mask may change value
}
c = vgetorpeek(TRUE);
if (did_inc)
{
--no_mapping;
--allow_keys;
}
// Get two extra bytes for special keys
if (c == K_SPECIAL
#ifdef FEAT_GUI
|| (gui.in_use && c == CSI)
#endif
)
{
int save_allow_keys = allow_keys;
++no_mapping;
allow_keys = 0; // make sure BS is not found
c2 = vgetorpeek(TRUE); // no mapping for these chars
c = vgetorpeek(TRUE);
--no_mapping;
allow_keys = save_allow_keys;
if (c2 == KS_MODIFIER)
{
mod_mask = c;
continue;
}
c = TO_SPECIAL(c2, c);
#if defined(FEAT_GUI_MSWIN) && defined(FEAT_MENU) && defined(FEAT_TEAROFF)
// Handle K_TEAROFF here, the caller of vgetc() doesn't need to
// know that a menu was torn off
if (
# ifdef VIMDLL
gui.in_use &&
# endif
c == K_TEAROFF)
{
char_u name[200];
int i;
// get menu path, it ends with a <CR>
for (i = 0; (c = vgetorpeek(TRUE)) != '\r'; )
{
name[i] = c;
if (i < 199)
++i;
}
name[i] = NUL;
gui_make_tearoff(name);
continue;
}
#endif
#if defined(FEAT_GUI) && defined(FEAT_GUI_GTK) && defined(FEAT_MENU)
// GTK: <F10> normally selects the menu, but it's passed until
// here to allow mapping it. Intercept and invoke the GTK
// behavior if it's not mapped.
if (c == K_F10 && gui.menubar != NULL)
{
gtk_menu_shell_select_first(
GTK_MENU_SHELL(gui.menubar), FALSE);
continue;
}
#endif
#ifdef FEAT_GUI
if (gui.in_use)
{
// Handle focus event here, so that the caller doesn't
// need to know about it. Return K_IGNORE so that we loop
// once (needed if 'lazyredraw' is set).
if (c == K_FOCUSGAINED || c == K_FOCUSLOST)
{
ui_focus_change(c == K_FOCUSGAINED);
c = K_IGNORE;
}
// Translate K_CSI to CSI. The special key is only used
// to avoid it being recognized as the start of a special
// key.
if (c == K_CSI)
c = CSI;
}
#endif
}
// a keypad or special function key was not mapped, use it like
// its ASCII equivalent
switch (c)
{
case K_KPLUS: c = '+'; break;
case K_KMINUS: c = '-'; break;
case K_KDIVIDE: c = '/'; break;
case K_KMULTIPLY: c = '*'; break;
case K_KENTER: c = CAR; break;
case K_KPOINT:
#ifdef MSWIN
// Can be either '.' or a ',',
// depending on the type of keypad.
c = MapVirtualKey(VK_DECIMAL, 2); break;
#else
c = '.'; break;
#endif
case K_K0: c = '0'; break;
case K_K1: c = '1'; break;
case K_K2: c = '2'; break;
case K_K3: c = '3'; break;
case K_K4: c = '4'; break;
case K_K5: c = '5'; break;
case K_K6: c = '6'; break;
case K_K7: c = '7'; break;
case K_K8: c = '8'; break;
case K_K9: c = '9'; break;
case K_XHOME:
case K_ZHOME: if (mod_mask == MOD_MASK_SHIFT)
{
c = K_S_HOME;
mod_mask = 0;
}
else if (mod_mask == MOD_MASK_CTRL)
{
c = K_C_HOME;
mod_mask = 0;
}
else
c = K_HOME;
break;
case K_XEND:
case K_ZEND: if (mod_mask == MOD_MASK_SHIFT)
{
c = K_S_END;
mod_mask = 0;
}
else if (mod_mask == MOD_MASK_CTRL)
{
c = K_C_END;
mod_mask = 0;
}
else
c = K_END;
break;
case K_XUP: c = K_UP; break;
case K_XDOWN: c = K_DOWN; break;
case K_XLEFT: c = K_LEFT; break;
case K_XRIGHT: c = K_RIGHT; break;
}
// For a multi-byte character get all the bytes and return the
// converted character.
// Note: This will loop until enough bytes are received!
if (has_mbyte && (n = MB_BYTE2LEN_CHECK(c)) > 1)
{
++no_mapping;
buf[0] = c;
for (i = 1; i < n; ++i)
{
buf[i] = vgetorpeek(TRUE);
if (buf[i] == K_SPECIAL
#ifdef FEAT_GUI
|| (
# ifdef VIMDLL
gui.in_use &&
# endif
buf[i] == CSI)
#endif
)
{
// Must be a K_SPECIAL - KS_SPECIAL - KE_FILLER
// sequence, which represents a K_SPECIAL (0x80),
// or a CSI - KS_EXTRA - KE_CSI sequence, which
// represents a CSI (0x9B),
// or a K_SPECIAL - KS_EXTRA - KE_CSI, which is CSI
// too.
c = vgetorpeek(TRUE);
if (vgetorpeek(TRUE) == (int)KE_CSI && c == KS_EXTRA)
buf[i] = CSI;
}
}
--no_mapping;
c = (*mb_ptr2char)(buf);
}
if (!no_reduce_keys)
// A modifier was not used for a mapping, apply it to ASCII
// keys. Shift would already have been applied.
c = merge_modifyOtherKeys(c);
break;
}
}
#ifdef FEAT_EVAL
/*
* In the main loop "may_garbage_collect" can be set to do garbage
* collection in the first next vgetc(). It's disabled after that to
* avoid internally used Lists and Dicts to be freed.
*/
may_garbage_collect = FALSE;
#endif
#ifdef FEAT_BEVAL_TERM
if (c != K_MOUSEMOVE && c != K_IGNORE && c != K_CURSORHOLD)
{
// Don't trigger 'balloonexpr' unless only the mouse was moved.
bevalexpr_due_set = FALSE;
ui_remove_balloon();
}
#endif
#ifdef FEAT_PROP_POPUP
if (popup_do_filter(c))
{
if (c == Ctrl_C)
got_int = FALSE; // avoid looping
c = K_IGNORE;
}
#endif
// Need to process the character before we know it's safe to do something
// else.
if (c != K_IGNORE)
state_no_longer_safe("key typed");
return c;
}
/*
* Like vgetc(), but never return a NUL when called recursively, get a key
* directly from the user (ignoring typeahead).
*/
int
safe_vgetc(void)
{
int c;
c = vgetc();
if (c == NUL)
c = get_keystroke();
return c;
}
/*
* Like safe_vgetc(), but loop to handle K_IGNORE.
* Also ignore scrollbar events.
*/
int
plain_vgetc(void)
{
int c;
do
c = safe_vgetc();
while (c == K_IGNORE || c == K_VER_SCROLLBAR || c == K_HOR_SCROLLBAR);
if (c == K_PS)
// Only handle the first pasted character. Drop the rest, since we
// don't know what to do with it.
c = bracketed_paste(PASTE_ONE_CHAR, FALSE, NULL);
return c;
}
/*
* Check if a character is available, such that vgetc() will not block.
* If the next character is a special character or multi-byte, the returned
* character is not valid!.
* Returns NUL if no character is available.
*/
int
vpeekc(void)
{
if (old_char != -1)
return old_char;
return vgetorpeek(FALSE);
}
#if defined(FEAT_TERMRESPONSE) || defined(FEAT_TERMINAL) || defined(PROTO)
/*
* Like vpeekc(), but don't allow mapping. Do allow checking for terminal
* codes.
*/
int
vpeekc_nomap(void)
{
int c;
++no_mapping;
++allow_keys;
c = vpeekc();
--no_mapping;
--allow_keys;
return c;
}
#endif
/*
* Check if any character is available, also half an escape sequence.
* Trick: when no typeahead found, but there is something in the typeahead
* buffer, it must be an ESC that is recognized as the start of a key code.
*/
int
vpeekc_any(void)
{
int c;
c = vpeekc();
if (c == NUL && typebuf.tb_len > 0)
c = ESC;
return c;
}
/*
* Call vpeekc() without causing anything to be mapped.
* Return TRUE if a character is available, FALSE otherwise.
*/
int
char_avail(void)
{
int retval;
#ifdef FEAT_EVAL
// When test_override("char_avail", 1) was called pretend there is no
// typeahead.
if (disable_char_avail_for_testing)
return FALSE;
#endif
++no_mapping;
retval = vpeekc();
--no_mapping;
return (retval != NUL);
}
#if defined(FEAT_EVAL) || defined(PROTO)
/*
* "getchar()" function
*/
void
f_getchar(typval_T *argvars, typval_T *rettv)
{
varnumber_T n;
int error = FALSE;
#ifdef MESSAGE_QUEUE
// vpeekc() used to check for messages, but that caused problems, invoking
// a callback where it was not expected. Some plugins use getchar(1) in a
// loop to await a message, therefore make sure we check for messages here.
parse_queued_messages();
#endif
// Position the cursor. Needed after a message that ends in a space.
windgoto(msg_row, msg_col);
++no_mapping;
++allow_keys;
for (;;)
{
if (argvars[0].v_type == VAR_UNKNOWN)
// getchar(): blocking wait.
n = plain_vgetc();
else if (tv_get_number_chk(&argvars[0], &error) == 1)
// getchar(1): only check if char avail
n = vpeekc_any();
else if (error || vpeekc_any() == NUL)
// illegal argument or getchar(0) and no char avail: return zero
n = 0;
else
// getchar(0) and char avail: return char
n = plain_vgetc();
if (n == K_IGNORE)
continue;
break;
}
--no_mapping;
--allow_keys;
set_vim_var_nr(VV_MOUSE_WIN, 0);
set_vim_var_nr(VV_MOUSE_WINID, 0);
set_vim_var_nr(VV_MOUSE_LNUM, 0);
set_vim_var_nr(VV_MOUSE_COL, 0);
rettv->vval.v_number = n;
if (IS_SPECIAL(n) || mod_mask != 0)
{
char_u temp[10]; // modifier: 3, mbyte-char: 6, NUL: 1
int i = 0;
// Turn a special key into three bytes, plus modifier.
if (mod_mask != 0)
{
temp[i++] = K_SPECIAL;
temp[i++] = KS_MODIFIER;
temp[i++] = mod_mask;
}
if (IS_SPECIAL(n))
{
temp[i++] = K_SPECIAL;
temp[i++] = K_SECOND(n);
temp[i++] = K_THIRD(n);
}
else if (has_mbyte)
i += (*mb_char2bytes)(n, temp + i);
else
temp[i++] = n;
temp[i++] = NUL;
rettv->v_type = VAR_STRING;
rettv->vval.v_string = vim_strsave(temp);
if (is_mouse_key(n))
{
int row = mouse_row;
int col = mouse_col;
win_T *win;
linenr_T lnum;
win_T *wp;
int winnr = 1;
if (row >= 0 && col >= 0)
{
// Find the window at the mouse coordinates and compute the
// text position.
win = mouse_find_win(&row, &col, FIND_POPUP);
if (win == NULL)
return;
(void)mouse_comp_pos(win, &row, &col, &lnum, NULL);
#ifdef FEAT_PROP_POPUP
if (WIN_IS_POPUP(win))
winnr = 0;
else
#endif
for (wp = firstwin; wp != win && wp != NULL;
wp = wp->w_next)
++winnr;
set_vim_var_nr(VV_MOUSE_WIN, winnr);
set_vim_var_nr(VV_MOUSE_WINID, win->w_id);
set_vim_var_nr(VV_MOUSE_LNUM, lnum);
set_vim_var_nr(VV_MOUSE_COL, col + 1);
}
}
}
}
/*
* "getcharmod()" function
*/
void
f_getcharmod(typval_T *argvars UNUSED, typval_T *rettv)
{
rettv->vval.v_number = mod_mask;
}
#endif // FEAT_EVAL
#if defined(MESSAGE_QUEUE) || defined(PROTO)
# define MAX_REPEAT_PARSE 8
/*
* Process messages that have been queued for netbeans or clientserver.
* Also check if any jobs have ended.
* These functions can call arbitrary vimscript and should only be called when
* it is safe to do so.
*/
void
parse_queued_messages(void)
{
int old_curwin_id;
int old_curbuf_fnum;
int i;
int save_may_garbage_collect = may_garbage_collect;
static int entered = 0;
int was_safe = get_was_safe_state();
// Do not handle messages while redrawing, because it may cause buffers to
// change or be wiped while they are being redrawn.
if (updating_screen)
return;
// If memory allocation fails during startup we'll exit but curbuf or
// curwin could be NULL.
if (curbuf == NULL || curwin == NULL)
return;
old_curbuf_fnum = curbuf->b_fnum;
old_curwin_id = curwin->w_id;
++entered;
// may_garbage_collect is set in main_loop() to do garbage collection when
// blocking to wait on a character. We don't want that while parsing
// messages, a callback may invoke vgetc() while lists and dicts are in use
// in the call stack.
may_garbage_collect = FALSE;
// Loop when a job ended, but don't keep looping forever.
for (i = 0; i < MAX_REPEAT_PARSE; ++i)
{
// For Win32 mch_breakcheck() does not check for input, do it here.
# if defined(MSWIN) && defined(FEAT_JOB_CHANNEL)
channel_handle_events(FALSE);
# endif
# ifdef FEAT_NETBEANS_INTG
// Process the queued netbeans messages.
netbeans_parse_messages();
# endif
# ifdef FEAT_JOB_CHANNEL
// Write any buffer lines still to be written.
channel_write_any_lines();
// Process the messages queued on channels.
channel_parse_messages();
# endif
# if defined(FEAT_CLIENTSERVER) && defined(FEAT_X11)
// Process the queued clientserver messages.
server_parse_messages();
# endif
# ifdef FEAT_JOB_CHANNEL
// Check if any jobs have ended. If so, repeat the above to handle
// changes, e.g. stdin may have been closed.
if (job_check_ended())
continue;
# endif
# ifdef FEAT_TERMINAL
free_unused_terminals();
# endif
# ifdef FEAT_SOUND_CANBERRA
if (has_sound_callback_in_queue())
invoke_sound_callback();
# endif
break;
}
// When not nested we'll go back to waiting for a typed character. If it
// was safe before then this triggers a SafeStateAgain autocommand event.
if (entered == 1 && was_safe)
may_trigger_safestateagain();
may_garbage_collect = save_may_garbage_collect;
// If the current window or buffer changed we need to bail out of the
// waiting loop. E.g. when a job exit callback closes the terminal window.
if (curwin->w_id != old_curwin_id || curbuf->b_fnum != old_curbuf_fnum)
ins_char_typebuf(K_IGNORE);
--entered;
}
#endif
typedef enum {
map_result_fail, // failed, break loop
map_result_get, // get a character from typeahead
map_result_retry, // try to map again
map_result_nomatch // no matching mapping, get char
} map_result_T;
/*
* Check if the bytes at the start of the typeahead buffer are a character used
* in CTRL-X mode. This includes the form with a CTRL modifier.
*/
static int
at_ctrl_x_key(void)
{
char_u *p = typebuf.tb_buf + typebuf.tb_off;
int c = *p;
if (typebuf.tb_len > 3
&& c == K_SPECIAL
&& p[1] == KS_MODIFIER
&& (p[2] & MOD_MASK_CTRL))
c = p[3] & 0x1f;
return vim_is_ctrl_x_key(c);
}
/*
* Handle mappings in the typeahead buffer.
* - When something was mapped, return map_result_retry for recursive mappings.
* - When nothing mapped and typeahead has a character: return map_result_get.
* - When there is no match yet, return map_result_nomatch, need to get more
* typeahead.
*/
static int
handle_mapping(
int *keylenp,
int *timedout,
int *mapdepth)
{
mapblock_T *mp = NULL;
mapblock_T *mp2;
mapblock_T *mp_match;
int mp_match_len = 0;
int max_mlen = 0;
int tb_c1;
int mlen;
#ifdef FEAT_LANGMAP
int nolmaplen;
#endif
int keylen = *keylenp;
int i;
int local_State = get_real_state();
/*
* Check for a mappable key sequence.
* Walk through one maphash[] list until we find an entry that matches.
*
* Don't look for mappings if:
* - no_mapping set: mapping disabled (e.g. for CTRL-V)
* - maphash_valid not set: no mappings present.
* - typebuf.tb_buf[typebuf.tb_off] should not be remapped
* - in insert or cmdline mode and 'paste' option set
* - waiting for "hit return to continue" and CR or SPACE typed
* - waiting for a char with --more--
* - in Ctrl-X mode, and we get a valid char for that mode
*/
tb_c1 = typebuf.tb_buf[typebuf.tb_off];
if (no_mapping == 0 && is_maphash_valid()
&& (no_zero_mapping == 0 || tb_c1 != '0')
&& (typebuf.tb_maplen == 0
|| (p_remap
&& (typebuf.tb_noremap[typebuf.tb_off]
& (RM_NONE|RM_ABBR)) == 0))
&& !(p_paste && (State & (INSERT + CMDLINE)))
&& !(State == HITRETURN && (tb_c1 == CAR || tb_c1 == ' '))
&& State != ASKMORE
&& State != CONFIRM
&& !((ctrl_x_mode_not_default() && at_ctrl_x_key())
|| ((compl_cont_status & CONT_LOCAL)
&& (tb_c1 == Ctrl_N || tb_c1 == Ctrl_P))))
{
#ifdef FEAT_LANGMAP
if (tb_c1 == K_SPECIAL)
nolmaplen = 2;
else
{
LANGMAP_ADJUST(tb_c1, (State & (CMDLINE | INSERT)) == 0
&& get_real_state() != SELECTMODE);
nolmaplen = 0;
}
#endif
// First try buffer-local mappings.
mp = get_buf_maphash_list(local_State, tb_c1);
mp2 = get_maphash_list(local_State, tb_c1);
if (mp == NULL)
{
// There are no buffer-local mappings.
mp = mp2;
mp2 = NULL;
}
/*
* Loop until a partly matching mapping is found or all (local)
* mappings have been checked.
* The longest full match is remembered in "mp_match".
* A full match is only accepted if there is no partly match, so "aa"
* and "aaa" can both be mapped.
*/
mp_match = NULL;
mp_match_len = 0;
for ( ; mp != NULL;
mp->m_next == NULL ? (mp = mp2, mp2 = NULL) : (mp = mp->m_next))
{
// Only consider an entry if the first character matches and it is
// for the current state.
// Skip ":lmap" mappings if keys were mapped.
if (mp->m_keys[0] == tb_c1
&& (mp->m_mode & local_State)
&& !(mp->m_simplified && seenModifyOtherKeys)
&& ((mp->m_mode & LANGMAP) == 0 || typebuf.tb_maplen == 0))
{
#ifdef FEAT_LANGMAP
int nomap = nolmaplen;
int c2;
#endif
// find the match length of this mapping
for (mlen = 1; mlen < typebuf.tb_len; ++mlen)
{
#ifdef FEAT_LANGMAP
c2 = typebuf.tb_buf[typebuf.tb_off + mlen];
if (nomap > 0)
--nomap;
else if (c2 == K_SPECIAL)
nomap = 2;
else
LANGMAP_ADJUST(c2, TRUE);
if (mp->m_keys[mlen] != c2)
#else
if (mp->m_keys[mlen] !=
typebuf.tb_buf[typebuf.tb_off + mlen])
#endif
break;
}
// Don't allow mapping the first byte(s) of a multi-byte char.
// Happens when mapping <M-a> and then changing 'encoding'.
// Beware that 0x80 is escaped.
{
char_u *p1 = mp->m_keys;
char_u *p2 = mb_unescape(&p1);
if (has_mbyte && p2 != NULL
&& MB_BYTE2LEN(tb_c1) > mb_ptr2len(p2))
mlen = 0;
}
// Check an entry whether it matches.
// - Full match: mlen == keylen
// - Partly match: mlen == typebuf.tb_len
keylen = mp->m_keylen;
if (mlen == keylen || (mlen == typebuf.tb_len
&& typebuf.tb_len < keylen))
{
char_u *s;
int n;
// If only script-local mappings are allowed, check if the
// mapping starts with K_SNR.
s = typebuf.tb_noremap + typebuf.tb_off;
if (*s == RM_SCRIPT
&& (mp->m_keys[0] != K_SPECIAL
|| mp->m_keys[1] != KS_EXTRA
|| mp->m_keys[2] != (int)KE_SNR))
continue;
// If one of the typed keys cannot be remapped, skip the
// entry.
for (n = mlen; --n >= 0; )
if (*s++ & (RM_NONE|RM_ABBR))
break;
if (n >= 0)
continue;
if (keylen > typebuf.tb_len)
{
if (!*timedout && !(mp_match != NULL
&& mp_match->m_nowait))
{
// break at a partly match
keylen = KEYLEN_PART_MAP;
break;
}
}
else if (keylen > mp_match_len)
{
// found a longer match
mp_match = mp;
mp_match_len = keylen;
}
}
else
// No match; may have to check for termcode at next
// character.
if (max_mlen < mlen)
max_mlen = mlen;
}
}
// If no partly match found, use the longest full match.
if (keylen != KEYLEN_PART_MAP)
{
mp = mp_match;
keylen = mp_match_len;
}
}
/*
* Check for match with 'pastetoggle'
*/
if (*p_pt != NUL && mp == NULL && (State & (INSERT|NORMAL)))
{
for (mlen = 0; mlen < typebuf.tb_len && p_pt[mlen]; ++mlen)
if (p_pt[mlen] != typebuf.tb_buf[typebuf.tb_off + mlen])
break;
if (p_pt[mlen] == NUL) // match
{
// write chars to script file(s)
if (mlen > typebuf.tb_maplen)
gotchars(typebuf.tb_buf + typebuf.tb_off + typebuf.tb_maplen,
mlen - typebuf.tb_maplen);
del_typebuf(mlen, 0); // remove the chars
set_option_value((char_u *)"paste", (long)!p_paste, NULL, 0);
if (!(State & INSERT))
{
msg_col = 0;
msg_row = Rows - 1;
msg_clr_eos(); // clear ruler
}
status_redraw_all();
redraw_statuslines();
showmode();
setcursor();
*keylenp = keylen;
return map_result_retry;
}
// Need more chars for partly match.
if (mlen == typebuf.tb_len)
keylen = KEYLEN_PART_KEY;
else if (max_mlen < mlen)
// no match, may have to check for termcode at next character
max_mlen = mlen + 1;
}
if ((mp == NULL || max_mlen >= mp_match_len) && keylen != KEYLEN_PART_MAP)
{
int save_keylen = keylen;
/*
* When no matching mapping found or found a non-matching mapping that
* matches at least what the matching mapping matched:
* Check if we have a terminal code, when:
* - mapping is allowed,
* - keys have not been mapped,
* - and not an ESC sequence, not in insert mode or p_ek is on,
* - and when not timed out,
*/
if ((no_mapping == 0 || allow_keys != 0)
&& (typebuf.tb_maplen == 0
|| (p_remap && typebuf.tb_noremap[
typebuf.tb_off] == RM_YES))
&& !*timedout)
{
keylen = check_termcode(max_mlen + 1,
NULL, 0, NULL);
// If no termcode matched but 'pastetoggle' matched partially it's
// like an incomplete key sequence.
if (keylen == 0 && save_keylen == KEYLEN_PART_KEY)
keylen = KEYLEN_PART_KEY;
// When getting a partial match, but the last characters were not
// typed, don't wait for a typed character to complete the
// termcode. This helps a lot when a ":normal" command ends in an
// ESC.
if (keylen < 0 && typebuf.tb_len == typebuf.tb_maplen)
keylen = 0;
}
else
keylen = 0;
if (keylen == 0) // no matching terminal code
{
#ifdef AMIGA
// check for window bounds report
if (typebuf.tb_maplen == 0 && (typebuf.tb_buf[
typebuf.tb_off] & 0xff) == CSI)
{
char_u *s;
for (s = typebuf.tb_buf + typebuf.tb_off + 1;
s < typebuf.tb_buf + typebuf.tb_off + typebuf.tb_len
&& (VIM_ISDIGIT(*s) || *s == ';' || *s == ' ');
++s)
;
if (*s == 'r' || *s == '|') // found one
{
del_typebuf(
(int)(s + 1 - (typebuf.tb_buf + typebuf.tb_off)), 0);
// get size and redraw screen
shell_resized();
*keylenp = keylen;
return map_result_retry;
}
if (*s == NUL) // need more characters
keylen = KEYLEN_PART_KEY;
}
if (keylen >= 0)
#endif
// When there was a matching mapping and no termcode could be
// replaced after another one, use that mapping (loop around).
// If there was no mapping at all use the character from the
// typeahead buffer right here.
if (mp == NULL)
{
*keylenp = keylen;
return map_result_get; // got character, break for loop
}
}
if (keylen > 0) // full matching terminal code
{
#if defined(FEAT_GUI) && defined(FEAT_MENU)
if (typebuf.tb_len >= 2
&& typebuf.tb_buf[typebuf.tb_off] == K_SPECIAL
&& typebuf.tb_buf[typebuf.tb_off + 1] == KS_MENU)
{
int idx;
// Using a menu may cause a break in undo! It's like using
// gotchars(), but without recording or writing to a script
// file.
may_sync_undo();
del_typebuf(3, 0);
idx = get_menu_index(current_menu, local_State);
if (idx != MENU_INDEX_INVALID)
{
// In Select mode and a Visual mode menu is used: Switch
// to Visual mode temporarily. Append K_SELECT to switch
// back to Select mode.
if (VIsual_active && VIsual_select
&& (current_menu->modes & VISUAL))
{
VIsual_select = FALSE;
(void)ins_typebuf(K_SELECT_STRING,
REMAP_NONE, 0, TRUE, FALSE);
}
ins_typebuf(current_menu->strings[idx],
current_menu->noremap[idx],
0, TRUE, current_menu->silent[idx]);
}
}
#endif // FEAT_GUI && FEAT_MENU
*keylenp = keylen;
return map_result_retry; // try mapping again
}
// Partial match: get some more characters. When a matching mapping
// was found use that one.
if (mp == NULL || keylen < 0)
keylen = KEYLEN_PART_KEY;
else
keylen = mp_match_len;
}
/*
* complete match
*/
if (keylen >= 0 && keylen <= typebuf.tb_len)
{
char_u *map_str;
#ifdef FEAT_EVAL
int save_m_expr;
int save_m_noremap;
int save_m_silent;
char_u *save_m_keys;
char_u *save_m_str;
#else
# define save_m_noremap mp->m_noremap
# define save_m_silent mp->m_silent
#endif
// write chars to script file(s)
if (keylen > typebuf.tb_maplen)
gotchars(typebuf.tb_buf + typebuf.tb_off + typebuf.tb_maplen,
keylen - typebuf.tb_maplen);
cmd_silent = (typebuf.tb_silent > 0);
del_typebuf(keylen, 0); // remove the mapped keys
/*
* Put the replacement string in front of mapstr.
* The depth check catches ":map x y" and ":map y x".
*/
if (++*mapdepth >= p_mmd)
{
emsg(_("E223: recursive mapping"));
if (State & CMDLINE)
redrawcmdline();
else
setcursor();
flush_buffers(FLUSH_MINIMAL);
*mapdepth = 0; // for next one
*keylenp = keylen;
return map_result_fail;
}
/*
* In Select mode and a Visual mode mapping is used: Switch to Visual
* mode temporarily. Append K_SELECT to switch back to Select mode.
*/
if (VIsual_active && VIsual_select && (mp->m_mode & VISUAL))
{
VIsual_select = FALSE;
(void)ins_typebuf(K_SELECT_STRING, REMAP_NONE, 0, TRUE, FALSE);
}
#ifdef FEAT_EVAL
// Copy the values from *mp that are used, because evaluating the
// expression may invoke a function that redefines the mapping, thereby
// making *mp invalid.
save_m_expr = mp->m_expr;
save_m_noremap = mp->m_noremap;
save_m_silent = mp->m_silent;
save_m_keys = NULL; // only saved when needed
save_m_str = NULL; // only saved when needed
/*
* Handle ":map <expr>": evaluate the {rhs} as an expression. Also
* save and restore the command line for "normal :".
*/
if (mp->m_expr)
{
int save_vgetc_busy = vgetc_busy;
int save_may_garbage_collect = may_garbage_collect;
int was_screen_col = screen_cur_col;
int was_screen_row = screen_cur_row;
vgetc_busy = 0;
may_garbage_collect = FALSE;
save_m_keys = vim_strsave(mp->m_keys);
save_m_str = vim_strsave(mp->m_str);
map_str = eval_map_expr(save_m_str, NUL);
// The mapping may do anything, but we expect it to take care of
// redrawing. Do put the cursor back where it was.
windgoto(was_screen_row, was_screen_col);
out_flush();
vgetc_busy = save_vgetc_busy;
may_garbage_collect = save_may_garbage_collect;
}
else
#endif
map_str = mp->m_str;
/*
* Insert the 'to' part in the typebuf.tb_buf.
* If 'from' field is the same as the start of the 'to' field, don't
* remap the first character (but do allow abbreviations).
* If m_noremap is set, don't remap the whole 'to' part.
*/
if (map_str == NULL)
i = FAIL;
else
{
int noremap;
if (save_m_noremap != REMAP_YES)
noremap = save_m_noremap;
else if (
#ifdef FEAT_EVAL
STRNCMP(map_str, save_m_keys != NULL ? save_m_keys : mp->m_keys,
(size_t)keylen)
#else
STRNCMP(map_str, mp->m_keys, (size_t)keylen)
#endif
!= 0)
noremap = REMAP_YES;
else
noremap = REMAP_SKIP;
i = ins_typebuf(map_str, noremap,
0, TRUE, cmd_silent || save_m_silent);
#ifdef FEAT_EVAL
if (save_m_expr)
vim_free(map_str);
#endif
}
#ifdef FEAT_EVAL
vim_free(save_m_keys);
vim_free(save_m_str);
#endif
*keylenp = keylen;
if (i == FAIL)
return map_result_fail;
return map_result_retry;
}
*keylenp = keylen;
return map_result_nomatch;
}
/*
* unget one character (can only be done once!)
*/
void
vungetc(int c)
{
old_char = c;
old_mod_mask = mod_mask;
old_mouse_row = mouse_row;
old_mouse_col = mouse_col;
}
/*
* Get a byte:
* 1. from the stuffbuffer
* This is used for abbreviated commands like "D" -> "d$".
* Also used to redo a command for ".".
* 2. from the typeahead buffer
* Stores text obtained previously but not used yet.
* Also stores the result of mappings.
* Also used for the ":normal" command.
* 3. from the user
* This may do a blocking wait if "advance" is TRUE.
*
* if "advance" is TRUE (vgetc()):
* Really get the character.
* KeyTyped is set to TRUE in the case the user typed the key.
* KeyStuffed is TRUE if the character comes from the stuff buffer.
* if "advance" is FALSE (vpeekc()):
* Just look whether there is a character available.
* Return NUL if not.
*
* When "no_mapping" is zero, checks for mappings in the current mode.
* Only returns one byte (of a multi-byte character).
* K_SPECIAL and CSI may be escaped, need to get two more bytes then.
*/
static int
vgetorpeek(int advance)
{
int c, c1;
int timedout = FALSE; // waited for more than 1 second
// for mapping to complete
int mapdepth = 0; // check for recursive mapping
int mode_deleted = FALSE; // set when mode has been deleted
#ifdef FEAT_CMDL_INFO
int new_wcol, new_wrow;
#endif
#ifdef FEAT_GUI
int shape_changed = FALSE; // adjusted cursor shape
#endif
int n;
int old_wcol, old_wrow;
int wait_tb_len;
/*
* This function doesn't work very well when called recursively. This may
* happen though, because of:
* 1. The call to add_to_showcmd(). char_avail() is then used to check if
* there is a character available, which calls this function. In that
* case we must return NUL, to indicate no character is available.
* 2. A GUI callback function writes to the screen, causing a
* wait_return().
* Using ":normal" can also do this, but it saves the typeahead buffer,
* thus it should be OK. But don't get a key from the user then.
*/
if (vgetc_busy > 0 && ex_normal_busy == 0)
return NUL;
++vgetc_busy;
if (advance)
KeyStuffed = FALSE;
init_typebuf();
start_stuff();
if (advance && typebuf.tb_maplen == 0)
reg_executing = 0;
do
{
/*
* get a character: 1. from the stuffbuffer
*/
if (typeahead_char != 0)
{
c = typeahead_char;
if (advance)
typeahead_char = 0;
}
else
c = read_readbuffers(advance);
if (c != NUL && !got_int)
{
if (advance)
{
// KeyTyped = FALSE; When the command that stuffed something
// was typed, behave like the stuffed command was typed.
// needed for CTRL-W CTRL-] to open a fold, for example.
KeyStuffed = TRUE;
}
if (typebuf.tb_no_abbr_cnt == 0)
typebuf.tb_no_abbr_cnt = 1; // no abbreviations now
}
else
{
/*
* Loop until we either find a matching mapped key, or we
* are sure that it is not a mapped key.
* If a mapped key sequence is found we go back to the start to
* try re-mapping.
*/
for (;;)
{
long wait_time;
int keylen = 0;
#ifdef FEAT_CMDL_INFO
int showcmd_idx;
#endif
/*
* ui_breakcheck() is slow, don't use it too often when
* inside a mapping. But call it each time for typed
* characters.
*/
if (typebuf.tb_maplen)
line_breakcheck();
else
ui_breakcheck(); // check for CTRL-C
if (got_int)
{
// flush all input
c = inchar(typebuf.tb_buf, typebuf.tb_buflen - 1, 0L);
/*
* If inchar() returns TRUE (script file was active) or we
* are inside a mapping, get out of Insert mode.
* Otherwise we behave like having gotten a CTRL-C.
* As a result typing CTRL-C in insert mode will
* really insert a CTRL-C.
*/
if ((c || typebuf.tb_maplen)
&& (State & (INSERT + CMDLINE)))
c = ESC;
else
c = Ctrl_C;
flush_buffers(FLUSH_INPUT); // flush all typeahead
if (advance)
{
// Also record this character, it might be needed to
// get out of Insert mode.
*typebuf.tb_buf = c;
gotchars(typebuf.tb_buf, 1);
}
cmd_silent = FALSE;
break;
}
else if (typebuf.tb_len > 0)
{
/*
* Check for a mapping in "typebuf".
*/
map_result_T result = handle_mapping(
&keylen, &timedout, &mapdepth);
if (result == map_result_retry)
// try mapping again
continue;
if (result == map_result_fail)
{
// failed, use the outer loop
c = -1;
break;
}
if (result == map_result_get)
{
/*
* get a character: 2. from the typeahead buffer
*/
c = typebuf.tb_buf[typebuf.tb_off];
if (advance) // remove chars from tb_buf
{
cmd_silent = (typebuf.tb_silent > 0);
if (typebuf.tb_maplen > 0)
KeyTyped = FALSE;
else
{
KeyTyped = TRUE;
// write char to script file(s)
gotchars(typebuf.tb_buf
+ typebuf.tb_off, 1);
}
KeyNoremap = typebuf.tb_noremap[
typebuf.tb_off];
del_typebuf(1, 0);
}
break;
}
// not enough characters, get more
}
/*
* get a character: 3. from the user - handle <Esc> in Insert mode
*/
/*
* Special case: if we get an <ESC> in insert mode and there
* are no more characters at once, we pretend to go out of
* insert mode. This prevents the one second delay after
* typing an <ESC>. If we get something after all, we may
* have to redisplay the mode. That the cursor is in the wrong
* place does not matter.
*/
c = 0;
#ifdef FEAT_CMDL_INFO
new_wcol = curwin->w_wcol;
new_wrow = curwin->w_wrow;
#endif
if ( advance
&& typebuf.tb_len == 1
&& typebuf.tb_buf[typebuf.tb_off] == ESC
&& !no_mapping
&& ex_normal_busy == 0
&& typebuf.tb_maplen == 0
&& (State & INSERT)
&& (p_timeout
|| (keylen == KEYLEN_PART_KEY && p_ttimeout))
&& (c = inchar(typebuf.tb_buf + typebuf.tb_off
+ typebuf.tb_len, 3, 25L)) == 0)
{
colnr_T col = 0, vcol;
char_u *ptr;
if (mode_displayed)
{
unshowmode(TRUE);
mode_deleted = TRUE;
}
#ifdef FEAT_GUI
// may show a different cursor shape
if (gui.in_use && State != NORMAL && !cmd_silent)
{
int save_State;
save_State = State;
State = NORMAL;
gui_update_cursor(TRUE, FALSE);
State = save_State;
shape_changed = TRUE;
}
#endif
validate_cursor();
old_wcol = curwin->w_wcol;
old_wrow = curwin->w_wrow;
// move cursor left, if possible
if (curwin->w_cursor.col != 0)
{
if (curwin->w_wcol > 0)
{
if (did_ai)
{
/*
* We are expecting to truncate the trailing
* white-space, so find the last non-white
* character -- webb
*/
col = vcol = curwin->w_wcol = 0;
ptr = ml_get_curline();
while (col < curwin->w_cursor.col)
{
if (!VIM_ISWHITE(ptr[col]))
curwin->w_wcol = vcol;
vcol += lbr_chartabsize(ptr, ptr + col,
(colnr_T)vcol);
if (has_mbyte)
col += (*mb_ptr2len)(ptr + col);
else
++col;
}
curwin->w_wrow = curwin->w_cline_row
+ curwin->w_wcol / curwin->w_width;
curwin->w_wcol %= curwin->w_width;
curwin->w_wcol += curwin_col_off();
col = 0; // no correction needed
}
else
{
--curwin->w_wcol;
col = curwin->w_cursor.col - 1;
}
}
else if (curwin->w_p_wrap && curwin->w_wrow)
{
--curwin->w_wrow;
curwin->w_wcol = curwin->w_width - 1;
col = curwin->w_cursor.col - 1;
}
if (has_mbyte && col > 0 && curwin->w_wcol > 0)
{
// Correct when the cursor is on the right halve
// of a double-wide character.
ptr = ml_get_curline();
col -= (*mb_head_off)(ptr, ptr + col);
if ((*mb_ptr2cells)(ptr + col) > 1)
--curwin->w_wcol;
}
}
setcursor();
out_flush();
#ifdef FEAT_CMDL_INFO
new_wcol = curwin->w_wcol;
new_wrow = curwin->w_wrow;
#endif
curwin->w_wcol = old_wcol;
curwin->w_wrow = old_wrow;
}
if (c < 0)
continue; // end of input script reached
// Allow mapping for just typed characters. When we get here c
// is the number of extra bytes and typebuf.tb_len is 1.
for (n = 1; n <= c; ++n)
typebuf.tb_noremap[typebuf.tb_off + n] = RM_YES;
typebuf.tb_len += c;
// buffer full, don't map
if (typebuf.tb_len >= typebuf.tb_maplen + MAXMAPLEN)
{
timedout = TRUE;
continue;
}
if (ex_normal_busy > 0)
{
#ifdef FEAT_CMDWIN
static int tc = 0;
#endif
// No typeahead left and inside ":normal". Must return
// something to avoid getting stuck. When an incomplete
// mapping is present, behave like it timed out.
if (typebuf.tb_len > 0)
{
timedout = TRUE;
continue;
}
// When 'insertmode' is set, ESC just beeps in Insert
// mode. Use CTRL-L to make edit() return.
// For the command line only CTRL-C always breaks it.
// For the cmdline window: Alternate between ESC and
// CTRL-C: ESC for most situations and CTRL-C to close the
// cmdline window.
if (p_im && (State & INSERT))
c = Ctrl_L;
#ifdef FEAT_TERMINAL
else if (terminal_is_active())
c = K_CANCEL;
#endif
else if ((State & CMDLINE)
#ifdef FEAT_CMDWIN
|| (cmdwin_type > 0 && tc == ESC)
#endif
)
c = Ctrl_C;
else
c = ESC;
#ifdef FEAT_CMDWIN
tc = c;
#endif
break;
}
/*
* get a character: 3. from the user - update display
*/
// In insert mode a screen update is skipped when characters
// are still available. But when those available characters
// are part of a mapping, and we are going to do a blocking
// wait here. Need to update the screen to display the
// changed text so far. Also for when 'lazyredraw' is set and
// redrawing was postponed because there was something in the
// input buffer (e.g., termresponse).
if (((State & INSERT) != 0 || p_lz) && (State & CMDLINE) == 0
&& advance && must_redraw != 0 && !need_wait_return)
{
update_screen(0);
setcursor(); // put cursor back where it belongs
}
/*
* If we have a partial match (and are going to wait for more
* input from the user), show the partially matched characters
* to the user with showcmd.
*/
#ifdef FEAT_CMDL_INFO
showcmd_idx = 0;
#endif
c1 = 0;
if (typebuf.tb_len > 0 && advance && !exmode_active)
{
if (((State & (NORMAL | INSERT)) || State == LANGMAP)
&& State != HITRETURN)
{
// this looks nice when typing a dead character map
if (State & INSERT
&& ptr2cells(typebuf.tb_buf + typebuf.tb_off
+ typebuf.tb_len - 1) == 1)
{
edit_putchar(typebuf.tb_buf[typebuf.tb_off
+ typebuf.tb_len - 1], FALSE);
setcursor(); // put cursor back where it belongs
c1 = 1;
}
#ifdef FEAT_CMDL_INFO
// need to use the col and row from above here
old_wcol = curwin->w_wcol;
old_wrow = curwin->w_wrow;
curwin->w_wcol = new_wcol;
curwin->w_wrow = new_wrow;
push_showcmd();
if (typebuf.tb_len > SHOWCMD_COLS)
showcmd_idx = typebuf.tb_len - SHOWCMD_COLS;
while (showcmd_idx < typebuf.tb_len)
(void)add_to_showcmd(
typebuf.tb_buf[typebuf.tb_off + showcmd_idx++]);
curwin->w_wcol = old_wcol;
curwin->w_wrow = old_wrow;
#endif
}
// this looks nice when typing a dead character map
if ((State & CMDLINE)
#if defined(FEAT_CRYPT) || defined(FEAT_EVAL)
&& cmdline_star == 0
#endif
&& ptr2cells(typebuf.tb_buf + typebuf.tb_off
+ typebuf.tb_len - 1) == 1)
{
putcmdline(typebuf.tb_buf[typebuf.tb_off
+ typebuf.tb_len - 1], FALSE);
c1 = 1;
}
}
/*
* get a character: 3. from the user - get it
*/
if (typebuf.tb_len == 0)
// timedout may have been set while waiting for a mapping
// that has a <Nop> RHS.
timedout = FALSE;
if (advance)
{
if (typebuf.tb_len == 0
|| !(p_timeout
|| (p_ttimeout && keylen == KEYLEN_PART_KEY)))
// blocking wait
wait_time = -1L;
else if (keylen == KEYLEN_PART_KEY && p_ttm >= 0)
wait_time = p_ttm;
else
wait_time = p_tm;
}
else
wait_time = 0;
wait_tb_len = typebuf.tb_len;
c = inchar(typebuf.tb_buf + typebuf.tb_off + typebuf.tb_len,
typebuf.tb_buflen - typebuf.tb_off - typebuf.tb_len - 1,
wait_time);
#ifdef FEAT_CMDL_INFO
if (showcmd_idx != 0)
pop_showcmd();
#endif
if (c1 == 1)
{
if (State & INSERT)
edit_unputchar();
if (State & CMDLINE)
unputcmdline();
else
setcursor(); // put cursor back where it belongs
}
if (c < 0)
continue; // end of input script reached
if (c == NUL) // no character available
{
if (!advance)
break;
if (wait_tb_len > 0) // timed out
{
timedout = TRUE;
continue;
}
}
else
{ // allow mapping for just typed characters
while (typebuf.tb_buf[typebuf.tb_off
+ typebuf.tb_len] != NUL)
typebuf.tb_noremap[typebuf.tb_off
+ typebuf.tb_len++] = RM_YES;
#ifdef HAVE_INPUT_METHOD
// Get IM status right after getting keys, not after the
// timeout for a mapping (focus may be lost by then).
vgetc_im_active = im_get_status();
#endif
}
} // for (;;)
} // if (!character from stuffbuf)
// if advance is FALSE don't loop on NULs
} while ((c < 0 && c != K_CANCEL) || (advance && c == NUL));
/*
* The "INSERT" message is taken care of here:
* if we return an ESC to exit insert mode, the message is deleted
* if we don't return an ESC but deleted the message before, redisplay it
*/
if (advance && p_smd && msg_silent == 0 && (State & INSERT))
{
if (c == ESC && !mode_deleted && !no_mapping && mode_displayed)
{
if (typebuf.tb_len && !KeyTyped)
redraw_cmdline = TRUE; // delete mode later
else
unshowmode(FALSE);
}
else if (c != ESC && mode_deleted)
{
if (typebuf.tb_len && !KeyTyped)
redraw_cmdline = TRUE; // show mode later
else
showmode();
}
}
#ifdef FEAT_GUI
// may unshow different cursor shape
if (gui.in_use && shape_changed)
gui_update_cursor(TRUE, FALSE);
#endif
if (timedout && c == ESC)
{
char_u nop_buf[3];
// When recording there will be no timeout. Add a <Nop> after the ESC
// to avoid that it forms a key code with following characters.
nop_buf[0] = K_SPECIAL;
nop_buf[1] = KS_EXTRA;
nop_buf[2] = KE_NOP;
gotchars(nop_buf, 3);
}
--vgetc_busy;
return c;
}
/*
* inchar() - get one character from
* 1. a scriptfile
* 2. the keyboard
*
* As much characters as we can get (upto 'maxlen') are put in "buf" and
* NUL terminated (buffer length must be 'maxlen' + 1).
* Minimum for "maxlen" is 3!!!!
*
* "tb_change_cnt" is the value of typebuf.tb_change_cnt if "buf" points into
* it. When typebuf.tb_change_cnt changes (e.g., when a message is received
* from a remote client) "buf" can no longer be used. "tb_change_cnt" is 0
* otherwise.
*
* If we got an interrupt all input is read until none is available.
*
* If wait_time == 0 there is no waiting for the char.
* If wait_time == n we wait for n msec for a character to arrive.
* If wait_time == -1 we wait forever for a character to arrive.
*
* Return the number of obtained characters.
* Return -1 when end of input script reached.
*/
static int
inchar(
char_u *buf,
int maxlen,
long wait_time) // milli seconds
{
int len = 0; // init for GCC
int retesc = FALSE; // return ESC with gotint
int script_char;
int tb_change_cnt = typebuf.tb_change_cnt;
if (wait_time == -1L || wait_time > 100L) // flush output before waiting
{
cursor_on();
out_flush_cursor(FALSE, FALSE);
#if defined(FEAT_GUI) && defined(FEAT_MOUSESHAPE)
if (gui.in_use && postponed_mouseshape)
update_mouseshape(-1);
#endif
}
/*
* Don't reset these when at the hit-return prompt, otherwise a endless
* recursive loop may result (write error in swapfile, hit-return, timeout
* on char wait, flush swapfile, write error....).
*/
if (State != HITRETURN)
{
did_outofmem_msg = FALSE; // display out of memory message (again)
did_swapwrite_msg = FALSE; // display swap file write error again
}
undo_off = FALSE; // restart undo now
/*
* Get a character from a script file if there is one.
* If interrupted: Stop reading script files, close them all.
*/
script_char = -1;
while (scriptin[curscript] != NULL && script_char < 0
#ifdef FEAT_EVAL
&& !ignore_script
#endif
)
{
#ifdef MESSAGE_QUEUE
parse_queued_messages();
#endif
if (got_int || (script_char = getc(scriptin[curscript])) < 0)
{
// Reached EOF.
// Careful: closescript() frees typebuf.tb_buf[] and buf[] may
// point inside typebuf.tb_buf[]. Don't use buf[] after this!
closescript();
/*
* When reading script file is interrupted, return an ESC to get
* back to normal mode.
* Otherwise return -1, because typebuf.tb_buf[] has changed.
*/
if (got_int)
retesc = TRUE;
else
return -1;
}
else
{
buf[0] = script_char;
len = 1;
}
}
if (script_char < 0) // did not get a character from script
{
/*
* If we got an interrupt, skip all previously typed characters and
* return TRUE if quit reading script file.
* Stop reading typeahead when a single CTRL-C was read,
* fill_input_buf() returns this when not able to read from stdin.
* Don't use buf[] here, closescript() may have freed typebuf.tb_buf[]
* and buf may be pointing inside typebuf.tb_buf[].
*/
if (got_int)
{
#define DUM_LEN MAXMAPLEN * 3 + 3
char_u dum[DUM_LEN + 1];
for (;;)
{
len = ui_inchar(dum, DUM_LEN, 0L, 0);
if (len == 0 || (len == 1 && dum[0] == 3))
break;
}
return retesc;
}
/*
* Always flush the output characters when getting input characters
* from the user and not just peeking.
*/
if (wait_time == -1L || wait_time > 10L)
out_flush();
/*
* Fill up to a third of the buffer, because each character may be
* tripled below.
*/
len = ui_inchar(buf, maxlen / 3, wait_time, tb_change_cnt);
}
// If the typebuf was changed further down, it is like nothing was added by
// this call.
if (typebuf_changed(tb_change_cnt))
return 0;
// Note the change in the typeahead buffer, this matters for when
// vgetorpeek() is called recursively, e.g. using getchar(1) in a timer
// function.
if (len > 0 && ++typebuf.tb_change_cnt == 0)
typebuf.tb_change_cnt = 1;
return fix_input_buffer(buf, len);
}
/*
* Fix typed characters for use by vgetc() and check_termcode().
* "buf[]" must have room to triple the number of bytes!
* Returns the new length.
*/
int
fix_input_buffer(char_u *buf, int len)
{
int i;
char_u *p = buf;
/*
* Two characters are special: NUL and K_SPECIAL.
* When compiled With the GUI CSI is also special.
* Replace NUL by K_SPECIAL KS_ZERO KE_FILLER
* Replace K_SPECIAL by K_SPECIAL KS_SPECIAL KE_FILLER
* Replace CSI by K_SPECIAL KS_EXTRA KE_CSI
*/
for (i = len; --i >= 0; ++p)
{
#ifdef FEAT_GUI
// When the GUI is used any character can come after a CSI, don't
// escape it.
if (gui.in_use && p[0] == CSI && i >= 2)
{
p += 2;
i -= 2;
}
# ifndef MSWIN
// When the GUI is not used CSI needs to be escaped.
else if (!gui.in_use && p[0] == CSI)
{
mch_memmove(p + 3, p + 1, (size_t)i);
*p++ = K_SPECIAL;
*p++ = KS_EXTRA;
*p = (int)KE_CSI;
len += 2;
}
# endif
else
#endif
if (p[0] == NUL || (p[0] == K_SPECIAL
// timeout may generate K_CURSORHOLD
&& (i < 2 || p[1] != KS_EXTRA || p[2] != (int)KE_CURSORHOLD)
#if defined(MSWIN) && (!defined(FEAT_GUI) || defined(VIMDLL))
// Win32 console passes modifiers
&& (
# ifdef VIMDLL
gui.in_use ||
# endif
(i < 2 || p[1] != KS_MODIFIER))
#endif
))
{
mch_memmove(p + 3, p + 1, (size_t)i);
p[2] = K_THIRD(p[0]);
p[1] = K_SECOND(p[0]);
p[0] = K_SPECIAL;
p += 2;
len += 2;
}
}
*p = NUL; // add trailing NUL
return len;
}
#if defined(USE_INPUT_BUF) || defined(PROTO)
/*
* Return TRUE when bytes are in the input buffer or in the typeahead buffer.
* Normally the input buffer would be sufficient, but the server_to_input_buf()
* or feedkeys() may insert characters in the typeahead buffer while we are
* waiting for input to arrive.
*/
int
input_available(void)
{
return (!vim_is_input_buf_empty()
# if defined(FEAT_CLIENTSERVER) || defined(FEAT_EVAL)
|| typebuf_was_filled
# endif
);
}
#endif
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