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cmdexpand.c
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cmdexpand.c
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/* vi:set ts=8 sts=4 sw=4 noet:
*
* VIM - Vi IMproved by Bram Moolenaar
*
* Do ":help uganda" in Vim to read copying and usage conditions.
* Do ":help credits" in Vim to see a list of people who contributed.
* See README.txt for an overview of the Vim source code.
*/
/*
* cmdexpand.c: functions for command-line completion
*/
#include "vim.h"
static int cmd_showtail; // Only show path tail in lists ?
static void set_expand_context(expand_T *xp);
static int ExpandGeneric(expand_T *xp, regmatch_T *regmatch,
int *num_file, char_u ***file,
char_u *((*func)(expand_T *, int)), int escaped);
static int ExpandFromContext(expand_T *xp, char_u *, int *, char_u ***, int);
static int expand_showtail(expand_T *xp);
static int expand_shellcmd(char_u *filepat, int *num_file, char_u ***file, int flagsarg);
#if defined(FEAT_EVAL)
static int ExpandUserDefined(expand_T *xp, regmatch_T *regmatch, int *num_file, char_u ***file);
static int ExpandUserList(expand_T *xp, int *num_file, char_u ***file);
#endif
static int
sort_func_compare(const void *s1, const void *s2)
{
char_u *p1 = *(char_u **)s1;
char_u *p2 = *(char_u **)s2;
if (*p1 != '<' && *p2 == '<') return -1;
if (*p1 == '<' && *p2 != '<') return 1;
return STRCMP(p1, p2);
}
static void
ExpandEscape(
expand_T *xp,
char_u *str,
int numfiles,
char_u **files,
int options)
{
int i;
char_u *p;
// May change home directory back to "~"
if (options & WILD_HOME_REPLACE)
tilde_replace(str, numfiles, files);
if (options & WILD_ESCAPE)
{
if (xp->xp_context == EXPAND_FILES
|| xp->xp_context == EXPAND_FILES_IN_PATH
|| xp->xp_context == EXPAND_SHELLCMD
|| xp->xp_context == EXPAND_BUFFERS
|| xp->xp_context == EXPAND_DIRECTORIES)
{
// Insert a backslash into a file name before a space, \, %, #
// and wildmatch characters, except '~'.
for (i = 0; i < numfiles; ++i)
{
// for ":set path=" we need to escape spaces twice
if (xp->xp_backslash == XP_BS_THREE)
{
p = vim_strsave_escaped(files[i], (char_u *)" ");
if (p != NULL)
{
vim_free(files[i]);
files[i] = p;
#if defined(BACKSLASH_IN_FILENAME)
p = vim_strsave_escaped(files[i], (char_u *)" ");
if (p != NULL)
{
vim_free(files[i]);
files[i] = p;
}
#endif
}
}
#ifdef BACKSLASH_IN_FILENAME
p = vim_strsave_fnameescape(files[i], FALSE);
#else
p = vim_strsave_fnameescape(files[i], xp->xp_shell);
#endif
if (p != NULL)
{
vim_free(files[i]);
files[i] = p;
}
// If 'str' starts with "\~", replace "~" at start of
// files[i] with "\~".
if (str[0] == '\\' && str[1] == '~' && files[i][0] == '~')
escape_fname(&files[i]);
}
xp->xp_backslash = XP_BS_NONE;
// If the first file starts with a '+' escape it. Otherwise it
// could be seen as "+cmd".
if (*files[0] == '+')
escape_fname(&files[0]);
}
else if (xp->xp_context == EXPAND_TAGS)
{
// Insert a backslash before characters in a tag name that
// would terminate the ":tag" command.
for (i = 0; i < numfiles; ++i)
{
p = vim_strsave_escaped(files[i], (char_u *)"\\|\"");
if (p != NULL)
{
vim_free(files[i]);
files[i] = p;
}
}
}
}
}
/*
* Return FAIL if this is not an appropriate context in which to do
* completion of anything, return OK if it is (even if there are no matches).
* For the caller, this means that the character is just passed through like a
* normal character (instead of being expanded). This allows :s/^I^D etc.
*/
int
nextwild(
expand_T *xp,
int type,
int options, // extra options for ExpandOne()
int escape) // if TRUE, escape the returned matches
{
cmdline_info_T *ccline = get_cmdline_info();
int i, j;
char_u *p1;
char_u *p2;
int difflen;
int v;
if (xp->xp_numfiles == -1)
{
set_expand_context(xp);
cmd_showtail = expand_showtail(xp);
}
if (xp->xp_context == EXPAND_UNSUCCESSFUL)
{
beep_flush();
return OK; // Something illegal on command line
}
if (xp->xp_context == EXPAND_NOTHING)
{
// Caller can use the character as a normal char instead
return FAIL;
}
msg_puts("..."); // show that we are busy
out_flush();
i = (int)(xp->xp_pattern - ccline->cmdbuff);
xp->xp_pattern_len = ccline->cmdpos - i;
if (type == WILD_NEXT || type == WILD_PREV)
{
// Get next/previous match for a previous expanded pattern.
p2 = ExpandOne(xp, NULL, NULL, 0, type);
}
else
{
// Translate string into pattern and expand it.
if ((p1 = addstar(xp->xp_pattern, xp->xp_pattern_len,
xp->xp_context)) == NULL)
p2 = NULL;
else
{
int use_options = options |
WILD_HOME_REPLACE|WILD_ADD_SLASH|WILD_SILENT;
if (escape)
use_options |= WILD_ESCAPE;
if (p_wic)
use_options += WILD_ICASE;
p2 = ExpandOne(xp, p1,
vim_strnsave(&ccline->cmdbuff[i], xp->xp_pattern_len),
use_options, type);
vim_free(p1);
// longest match: make sure it is not shorter, happens with :help
if (p2 != NULL && type == WILD_LONGEST)
{
for (j = 0; j < xp->xp_pattern_len; ++j)
if (ccline->cmdbuff[i + j] == '*'
|| ccline->cmdbuff[i + j] == '?')
break;
if ((int)STRLEN(p2) < j)
VIM_CLEAR(p2);
}
}
}
if (p2 != NULL && !got_int)
{
difflen = (int)STRLEN(p2) - xp->xp_pattern_len;
if (ccline->cmdlen + difflen + 4 > ccline->cmdbufflen)
{
v = realloc_cmdbuff(ccline->cmdlen + difflen + 4);
xp->xp_pattern = ccline->cmdbuff + i;
}
else
v = OK;
if (v == OK)
{
mch_memmove(&ccline->cmdbuff[ccline->cmdpos + difflen],
&ccline->cmdbuff[ccline->cmdpos],
(size_t)(ccline->cmdlen - ccline->cmdpos + 1));
mch_memmove(&ccline->cmdbuff[i], p2, STRLEN(p2));
ccline->cmdlen += difflen;
ccline->cmdpos += difflen;
}
}
vim_free(p2);
redrawcmd();
cursorcmd();
// When expanding a ":map" command and no matches are found, assume that
// the key is supposed to be inserted literally
if (xp->xp_context == EXPAND_MAPPINGS && p2 == NULL)
return FAIL;
if (xp->xp_numfiles <= 0 && p2 == NULL)
beep_flush();
else if (xp->xp_numfiles == 1)
// free expanded pattern
(void)ExpandOne(xp, NULL, NULL, 0, WILD_FREE);
return OK;
}
/*
* Do wildcard expansion on the string 'str'.
* Chars that should not be expanded must be preceded with a backslash.
* Return a pointer to allocated memory containing the new string.
* Return NULL for failure.
*
* "orig" is the originally expanded string, copied to allocated memory. It
* should either be kept in orig_save or freed. When "mode" is WILD_NEXT or
* WILD_PREV "orig" should be NULL.
*
* Results are cached in xp->xp_files and xp->xp_numfiles, except when "mode"
* is WILD_EXPAND_FREE or WILD_ALL.
*
* mode = WILD_FREE: just free previously expanded matches
* mode = WILD_EXPAND_FREE: normal expansion, do not keep matches
* mode = WILD_EXPAND_KEEP: normal expansion, keep matches
* mode = WILD_NEXT: use next match in multiple match, wrap to first
* mode = WILD_PREV: use previous match in multiple match, wrap to first
* mode = WILD_ALL: return all matches concatenated
* mode = WILD_LONGEST: return longest matched part
* mode = WILD_ALL_KEEP: get all matches, keep matches
*
* options = WILD_LIST_NOTFOUND: list entries without a match
* options = WILD_HOME_REPLACE: do home_replace() for buffer names
* options = WILD_USE_NL: Use '\n' for WILD_ALL
* options = WILD_NO_BEEP: Don't beep for multiple matches
* options = WILD_ADD_SLASH: add a slash after directory names
* options = WILD_KEEP_ALL: don't remove 'wildignore' entries
* options = WILD_SILENT: don't print warning messages
* options = WILD_ESCAPE: put backslash before special chars
* options = WILD_ICASE: ignore case for files
*
* The variables xp->xp_context and xp->xp_backslash must have been set!
*/
char_u *
ExpandOne(
expand_T *xp,
char_u *str,
char_u *orig, // allocated copy of original of expanded string
int options,
int mode)
{
char_u *ss = NULL;
static int findex;
static char_u *orig_save = NULL; // kept value of orig
int orig_saved = FALSE;
int i;
long_u len;
int non_suf_match; // number without matching suffix
// first handle the case of using an old match
if (mode == WILD_NEXT || mode == WILD_PREV)
{
if (xp->xp_numfiles > 0)
{
if (mode == WILD_PREV)
{
if (findex == -1)
findex = xp->xp_numfiles;
--findex;
}
else // mode == WILD_NEXT
++findex;
// When wrapping around, return the original string, set findex to
// -1.
if (findex < 0)
{
if (orig_save == NULL)
findex = xp->xp_numfiles - 1;
else
findex = -1;
}
if (findex >= xp->xp_numfiles)
{
if (orig_save == NULL)
findex = 0;
else
findex = -1;
}
#ifdef FEAT_WILDMENU
if (p_wmnu)
win_redr_status_matches(xp, xp->xp_numfiles, xp->xp_files,
findex, cmd_showtail);
#endif
if (findex == -1)
return vim_strsave(orig_save);
return vim_strsave(xp->xp_files[findex]);
}
else
return NULL;
}
// free old names
if (xp->xp_numfiles != -1 && mode != WILD_ALL && mode != WILD_LONGEST)
{
FreeWild(xp->xp_numfiles, xp->xp_files);
xp->xp_numfiles = -1;
VIM_CLEAR(orig_save);
}
findex = 0;
if (mode == WILD_FREE) // only release file name
return NULL;
if (xp->xp_numfiles == -1)
{
vim_free(orig_save);
orig_save = orig;
orig_saved = TRUE;
// Do the expansion.
if (ExpandFromContext(xp, str, &xp->xp_numfiles, &xp->xp_files,
options) == FAIL)
{
#ifdef FNAME_ILLEGAL
// Illegal file name has been silently skipped. But when there
// are wildcards, the real problem is that there was no match,
// causing the pattern to be added, which has illegal characters.
if (!(options & WILD_SILENT) && (options & WILD_LIST_NOTFOUND))
semsg(_(e_nomatch2), str);
#endif
}
else if (xp->xp_numfiles == 0)
{
if (!(options & WILD_SILENT))
semsg(_(e_nomatch2), str);
}
else
{
// Escape the matches for use on the command line.
ExpandEscape(xp, str, xp->xp_numfiles, xp->xp_files, options);
// Check for matching suffixes in file names.
if (mode != WILD_ALL && mode != WILD_ALL_KEEP
&& mode != WILD_LONGEST)
{
if (xp->xp_numfiles)
non_suf_match = xp->xp_numfiles;
else
non_suf_match = 1;
if ((xp->xp_context == EXPAND_FILES
|| xp->xp_context == EXPAND_DIRECTORIES)
&& xp->xp_numfiles > 1)
{
// More than one match; check suffix.
// The files will have been sorted on matching suffix in
// expand_wildcards, only need to check the first two.
non_suf_match = 0;
for (i = 0; i < 2; ++i)
if (match_suffix(xp->xp_files[i]))
++non_suf_match;
}
if (non_suf_match != 1)
{
// Can we ever get here unless it's while expanding
// interactively? If not, we can get rid of this all
// together. Don't really want to wait for this message
// (and possibly have to hit return to continue!).
if (!(options & WILD_SILENT))
emsg(_(e_toomany));
else if (!(options & WILD_NO_BEEP))
beep_flush();
}
if (!(non_suf_match != 1 && mode == WILD_EXPAND_FREE))
ss = vim_strsave(xp->xp_files[0]);
}
}
}
// Find longest common part
if (mode == WILD_LONGEST && xp->xp_numfiles > 0)
{
int mb_len = 1;
int c0, ci;
for (len = 0; xp->xp_files[0][len]; len += mb_len)
{
if (has_mbyte)
{
mb_len = (*mb_ptr2len)(&xp->xp_files[0][len]);
c0 =(* mb_ptr2char)(&xp->xp_files[0][len]);
}
else
c0 = xp->xp_files[0][len];
for (i = 1; i < xp->xp_numfiles; ++i)
{
if (has_mbyte)
ci =(* mb_ptr2char)(&xp->xp_files[i][len]);
else
ci = xp->xp_files[i][len];
if (p_fic && (xp->xp_context == EXPAND_DIRECTORIES
|| xp->xp_context == EXPAND_FILES
|| xp->xp_context == EXPAND_SHELLCMD
|| xp->xp_context == EXPAND_BUFFERS))
{
if (MB_TOLOWER(c0) != MB_TOLOWER(ci))
break;
}
else if (c0 != ci)
break;
}
if (i < xp->xp_numfiles)
{
if (!(options & WILD_NO_BEEP))
vim_beep(BO_WILD);
break;
}
}
ss = alloc(len + 1);
if (ss)
vim_strncpy(ss, xp->xp_files[0], (size_t)len);
findex = -1; // next p_wc gets first one
}
// Concatenate all matching names
if (mode == WILD_ALL && xp->xp_numfiles > 0)
{
len = 0;
for (i = 0; i < xp->xp_numfiles; ++i)
len += (long_u)STRLEN(xp->xp_files[i]) + 1;
ss = alloc(len);
if (ss != NULL)
{
*ss = NUL;
for (i = 0; i < xp->xp_numfiles; ++i)
{
STRCAT(ss, xp->xp_files[i]);
if (i != xp->xp_numfiles - 1)
STRCAT(ss, (options & WILD_USE_NL) ? "\n" : " ");
}
}
}
if (mode == WILD_EXPAND_FREE || mode == WILD_ALL)
ExpandCleanup(xp);
// Free "orig" if it wasn't stored in "orig_save".
if (!orig_saved)
vim_free(orig);
return ss;
}
/*
* Prepare an expand structure for use.
*/
void
ExpandInit(expand_T *xp)
{
xp->xp_pattern = NULL;
xp->xp_pattern_len = 0;
xp->xp_backslash = XP_BS_NONE;
#ifndef BACKSLASH_IN_FILENAME
xp->xp_shell = FALSE;
#endif
xp->xp_numfiles = -1;
xp->xp_files = NULL;
#if defined(FEAT_EVAL)
xp->xp_arg = NULL;
#endif
xp->xp_line = NULL;
}
/*
* Cleanup an expand structure after use.
*/
void
ExpandCleanup(expand_T *xp)
{
if (xp->xp_numfiles >= 0)
{
FreeWild(xp->xp_numfiles, xp->xp_files);
xp->xp_numfiles = -1;
}
}
/*
* Show all matches for completion on the command line.
* Returns EXPAND_NOTHING when the character that triggered expansion should
* be inserted like a normal character.
*/
int
showmatches(expand_T *xp, int wildmenu UNUSED)
{
cmdline_info_T *ccline = get_cmdline_info();
#define L_SHOWFILE(m) (showtail ? sm_gettail(files_found[m]) : files_found[m])
int num_files;
char_u **files_found;
int i, j, k;
int maxlen;
int lines;
int columns;
char_u *p;
int lastlen;
int attr;
int showtail;
if (xp->xp_numfiles == -1)
{
set_expand_context(xp);
i = expand_cmdline(xp, ccline->cmdbuff, ccline->cmdpos,
&num_files, &files_found);
showtail = expand_showtail(xp);
if (i != EXPAND_OK)
return i;
}
else
{
num_files = xp->xp_numfiles;
files_found = xp->xp_files;
showtail = cmd_showtail;
}
#ifdef FEAT_WILDMENU
if (!wildmenu)
{
#endif
msg_didany = FALSE; // lines_left will be set
msg_start(); // prepare for paging
msg_putchar('\n');
out_flush();
cmdline_row = msg_row;
msg_didany = FALSE; // lines_left will be set again
msg_start(); // prepare for paging
#ifdef FEAT_WILDMENU
}
#endif
if (got_int)
got_int = FALSE; // only int. the completion, not the cmd line
#ifdef FEAT_WILDMENU
else if (wildmenu)
win_redr_status_matches(xp, num_files, files_found, -1, showtail);
#endif
else
{
// find the length of the longest file name
maxlen = 0;
for (i = 0; i < num_files; ++i)
{
if (!showtail && (xp->xp_context == EXPAND_FILES
|| xp->xp_context == EXPAND_SHELLCMD
|| xp->xp_context == EXPAND_BUFFERS))
{
home_replace(NULL, files_found[i], NameBuff, MAXPATHL, TRUE);
j = vim_strsize(NameBuff);
}
else
j = vim_strsize(L_SHOWFILE(i));
if (j > maxlen)
maxlen = j;
}
if (xp->xp_context == EXPAND_TAGS_LISTFILES)
lines = num_files;
else
{
// compute the number of columns and lines for the listing
maxlen += 2; // two spaces between file names
columns = ((int)Columns + 2) / maxlen;
if (columns < 1)
columns = 1;
lines = (num_files + columns - 1) / columns;
}
attr = HL_ATTR(HLF_D); // find out highlighting for directories
if (xp->xp_context == EXPAND_TAGS_LISTFILES)
{
msg_puts_attr(_("tagname"), HL_ATTR(HLF_T));
msg_clr_eos();
msg_advance(maxlen - 3);
msg_puts_attr(_(" kind file\n"), HL_ATTR(HLF_T));
}
// list the files line by line
for (i = 0; i < lines; ++i)
{
lastlen = 999;
for (k = i; k < num_files; k += lines)
{
if (xp->xp_context == EXPAND_TAGS_LISTFILES)
{
msg_outtrans_attr(files_found[k], HL_ATTR(HLF_D));
p = files_found[k] + STRLEN(files_found[k]) + 1;
msg_advance(maxlen + 1);
msg_puts((char *)p);
msg_advance(maxlen + 3);
msg_outtrans_long_attr(p + 2, HL_ATTR(HLF_D));
break;
}
for (j = maxlen - lastlen; --j >= 0; )
msg_putchar(' ');
if (xp->xp_context == EXPAND_FILES
|| xp->xp_context == EXPAND_SHELLCMD
|| xp->xp_context == EXPAND_BUFFERS)
{
// highlight directories
if (xp->xp_numfiles != -1)
{
char_u *halved_slash;
char_u *exp_path;
char_u *path;
// Expansion was done before and special characters
// were escaped, need to halve backslashes. Also
// $HOME has been replaced with ~/.
exp_path = expand_env_save_opt(files_found[k], TRUE);
path = exp_path != NULL ? exp_path : files_found[k];
halved_slash = backslash_halve_save(path);
j = mch_isdir(halved_slash != NULL ? halved_slash
: files_found[k]);
vim_free(exp_path);
if (halved_slash != path)
vim_free(halved_slash);
}
else
// Expansion was done here, file names are literal.
j = mch_isdir(files_found[k]);
if (showtail)
p = L_SHOWFILE(k);
else
{
home_replace(NULL, files_found[k], NameBuff, MAXPATHL,
TRUE);
p = NameBuff;
}
}
else
{
j = FALSE;
p = L_SHOWFILE(k);
}
lastlen = msg_outtrans_attr(p, j ? attr : 0);
}
if (msg_col > 0) // when not wrapped around
{
msg_clr_eos();
msg_putchar('\n');
}
out_flush(); // show one line at a time
if (got_int)
{
got_int = FALSE;
break;
}
}
// we redraw the command below the lines that we have just listed
// This is a bit tricky, but it saves a lot of screen updating.
cmdline_row = msg_row; // will put it back later
}
if (xp->xp_numfiles == -1)
FreeWild(num_files, files_found);
return EXPAND_OK;
}
/*
* Private gettail for showmatches() (and win_redr_status_matches()):
* Find tail of file name path, but ignore trailing "/".
*/
char_u *
sm_gettail(char_u *s)
{
char_u *p;
char_u *t = s;
int had_sep = FALSE;
for (p = s; *p != NUL; )
{
if (vim_ispathsep(*p)
#ifdef BACKSLASH_IN_FILENAME
&& !rem_backslash(p)
#endif
)
had_sep = TRUE;
else if (had_sep)
{
t = p;
had_sep = FALSE;
}
MB_PTR_ADV(p);
}
return t;
}
/*
* Return TRUE if we only need to show the tail of completion matches.
* When not completing file names or there is a wildcard in the path FALSE is
* returned.
*/
static int
expand_showtail(expand_T *xp)
{
char_u *s;
char_u *end;
// When not completing file names a "/" may mean something different.
if (xp->xp_context != EXPAND_FILES
&& xp->xp_context != EXPAND_SHELLCMD
&& xp->xp_context != EXPAND_DIRECTORIES)
return FALSE;
end = gettail(xp->xp_pattern);
if (end == xp->xp_pattern) // there is no path separator
return FALSE;
for (s = xp->xp_pattern; s < end; s++)
{
// Skip escaped wildcards. Only when the backslash is not a path
// separator, on DOS the '*' "path\*\file" must not be skipped.
if (rem_backslash(s))
++s;
else if (vim_strchr((char_u *)"*?[", *s) != NULL)
return FALSE;
}
return TRUE;
}
/*
* Prepare a string for expansion.
* When expanding file names: The string will be used with expand_wildcards().
* Copy "fname[len]" into allocated memory and add a '*' at the end.
* When expanding other names: The string will be used with regcomp(). Copy
* the name into allocated memory and prepend "^".
*/
char_u *
addstar(
char_u *fname,
int len,
int context) // EXPAND_FILES etc.
{
char_u *retval;
int i, j;
int new_len;
char_u *tail;
int ends_in_star;
if (context != EXPAND_FILES
&& context != EXPAND_FILES_IN_PATH
&& context != EXPAND_SHELLCMD
&& context != EXPAND_DIRECTORIES)
{
// Matching will be done internally (on something other than files).
// So we convert the file-matching-type wildcards into our kind for
// use with vim_regcomp(). First work out how long it will be:
// For help tags the translation is done in find_help_tags().
// For a tag pattern starting with "/" no translation is needed.
if (context == EXPAND_HELP
|| context == EXPAND_COLORS
|| context == EXPAND_COMPILER
|| context == EXPAND_OWNSYNTAX
|| context == EXPAND_FILETYPE
|| context == EXPAND_PACKADD
|| ((context == EXPAND_TAGS_LISTFILES
|| context == EXPAND_TAGS)
&& fname[0] == '/'))
retval = vim_strnsave(fname, len);
else
{
new_len = len + 2; // +2 for '^' at start, NUL at end
for (i = 0; i < len; i++)
{
if (fname[i] == '*' || fname[i] == '~')
new_len++; // '*' needs to be replaced by ".*"
// '~' needs to be replaced by "\~"
// Buffer names are like file names. "." should be literal
if (context == EXPAND_BUFFERS && fname[i] == '.')
new_len++; // "." becomes "\."
// Custom expansion takes care of special things, match
// backslashes literally (perhaps also for other types?)
if ((context == EXPAND_USER_DEFINED
|| context == EXPAND_USER_LIST) && fname[i] == '\\')
new_len++; // '\' becomes "\\"
}
retval = alloc(new_len);
if (retval != NULL)
{
retval[0] = '^';
j = 1;
for (i = 0; i < len; i++, j++)
{
// Skip backslash. But why? At least keep it for custom
// expansion.
if (context != EXPAND_USER_DEFINED
&& context != EXPAND_USER_LIST
&& fname[i] == '\\'
&& ++i == len)
break;
switch (fname[i])
{
case '*': retval[j++] = '.';
break;
case '~': retval[j++] = '\\';
break;
case '?': retval[j] = '.';
continue;
case '.': if (context == EXPAND_BUFFERS)
retval[j++] = '\\';
break;
case '\\': if (context == EXPAND_USER_DEFINED
|| context == EXPAND_USER_LIST)
retval[j++] = '\\';
break;
}
retval[j] = fname[i];
}
retval[j] = NUL;
}
}
}
else
{
retval = alloc(len + 4);
if (retval != NULL)
{
vim_strncpy(retval, fname, len);
// Don't add a star to *, ~, ~user, $var or `cmd`.
// * would become **, which walks the whole tree.
// ~ would be at the start of the file name, but not the tail.
// $ could be anywhere in the tail.
// ` could be anywhere in the file name.
// When the name ends in '$' don't add a star, remove the '$'.
tail = gettail(retval);
ends_in_star = (len > 0 && retval[len - 1] == '*');
#ifndef BACKSLASH_IN_FILENAME
for (i = len - 2; i >= 0; --i)
{
if (retval[i] != '\\')
break;
ends_in_star = !ends_in_star;
}
#endif
if ((*retval != '~' || tail != retval)
&& !ends_in_star
&& vim_strchr(tail, '$') == NULL
&& vim_strchr(retval, '`') == NULL)
retval[len++] = '*';
else if (len > 0 && retval[len - 1] == '$')
--len;
retval[len] = NUL;
}
}
return retval;
}
/*
* Must parse the command line so far to work out what context we are in.
* Completion can then be done based on that context.
* This routine sets the variables:
* xp->xp_pattern The start of the pattern to be expanded within
* the command line (ends at the cursor).
* xp->xp_context The type of thing to expand. Will be one of:
*
* EXPAND_UNSUCCESSFUL Used sometimes when there is something illegal on
* the command line, like an unknown command. Caller
* should beep.
* EXPAND_NOTHING Unrecognised context for completion, use char like
* a normal char, rather than for completion. eg
* :s/^I/
* EXPAND_COMMANDS Cursor is still touching the command, so complete
* it.
* EXPAND_BUFFERS Complete file names for :buf and :sbuf commands.
* EXPAND_FILES After command with EX_XFILE set, or after setting
* with P_EXPAND set. eg :e ^I, :w>>^I
* EXPAND_DIRECTORIES In some cases this is used instead of the latter
* when we know only directories are of interest. eg
* :set dir=^I
* EXPAND_SHELLCMD After ":!cmd", ":r !cmd" or ":w !cmd".
* EXPAND_SETTINGS Complete variable names. eg :set d^I
* EXPAND_BOOL_SETTINGS Complete boolean variables only, eg :set no^I
* EXPAND_TAGS Complete tags from the files in p_tags. eg :ta a^I
* EXPAND_TAGS_LISTFILES As above, but list filenames on ^D, after :tselect
* EXPAND_HELP Complete tags from the file 'helpfile'/tags
* EXPAND_EVENTS Complete event names
* EXPAND_SYNTAX Complete :syntax command arguments
* EXPAND_HIGHLIGHT Complete highlight (syntax) group names
* EXPAND_AUGROUP Complete autocommand group names
* EXPAND_USER_VARS Complete user defined variable names, eg :unlet a^I
* EXPAND_MAPPINGS Complete mapping and abbreviation names,
* eg :unmap a^I , :cunab x^I
* EXPAND_FUNCTIONS Complete internal or user defined function names,
* eg :call sub^I
* EXPAND_USER_FUNC Complete user defined function names, eg :delf F^I
* EXPAND_EXPRESSION Complete internal or user defined function/variable
* names in expressions, eg :while s^I
* EXPAND_ENV_VARS Complete environment variable names
* EXPAND_USER Complete user names
*/
static void
set_expand_context(expand_T *xp)
{
cmdline_info_T *ccline = get_cmdline_info();
// only expansion for ':', '>' and '=' command-lines
if (ccline->cmdfirstc != ':'
#ifdef FEAT_EVAL
&& ccline->cmdfirstc != '>' && ccline->cmdfirstc != '='
&& !ccline->input_fn
#endif
)
{
xp->xp_context = EXPAND_NOTHING;
return;
}
set_cmd_context(xp, ccline->cmdbuff, ccline->cmdlen, ccline->cmdpos, TRUE);
}
/*
* This is all pretty much copied from do_one_cmd(), with all the extra stuff
* we don't need/want deleted. Maybe this could be done better if we didn't
* repeat all this stuff. The only problem is that they may not stay
* perfectly compatible with each other, but then the command line syntax
* probably won't change that much -- webb.
*/
static char_u *
set_one_cmd_context(
expand_T *xp,
char_u *buff) // buffer for command string
{
char_u *p;
char_u *cmd, *arg;
int len = 0;
exarg_T ea;
int compl = EXPAND_NOTHING;
int delim;
int forceit = FALSE;
int usefilter = FALSE; // filter instead of file name
ExpandInit(xp);
xp->xp_pattern = buff;
xp->xp_context = EXPAND_COMMANDS; // Default until we get past command
ea.argt = 0;
// 1. skip comment lines and leading space, colons or bars
for (cmd = buff; vim_strchr((char_u *)" \t:|", *cmd) != NULL; cmd++)
;
xp->xp_pattern = cmd;
if (*cmd == NUL)
return NULL;
if (*cmd == '"') // ignore comment lines
{
xp->xp_context = EXPAND_NOTHING;
return NULL;
}