Here's a revised patch including a more rigorous way of parsing the error code
from a error message.
Another use-case I've been trying recently: if wrapscan is initially disabled,
enable it when the search hits top/bottom. This way one is notified that the
search reached the end but pressing n/N again will temporary enable wrapscan in
order to redo the search from the opposite end.
set nowrapscan
let s:wrapscan = 0
func! s:ToggleWrapScan(rhs) abort
if s:wrapscan
set wrapscan
let s:wrapscan = 0
else
set nowrapscan
endif
return a:rhs
endfunc
nnoremap <expr> n <SID>ToggleWrapScan('n')
nnoremap <expr> N <SID>ToggleWrapScan('N')
augroup error
au! Error E38[45] let s:wrapscan = 1
augroup END
--
:wq
--
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diff --git a/src/fileio.c b/src/fileio.c
index ecec757..9a1e294 100644
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -7666,6 +7666,7 @@ static struct event_name
{"CursorMoved", EVENT_CURSORMOVED},
{"CursorMovedI", EVENT_CURSORMOVEDI},
{"EncodingChanged", EVENT_ENCODINGCHANGED},
+ {"Error", EVENT_ERROR},
{"FileEncoding", EVENT_ENCODINGCHANGED},
{"FileAppendPost", EVENT_FILEAPPENDPOST},
{"FileAppendPre", EVENT_FILEAPPENDPRE},
@@ -7725,6 +7726,21 @@ static struct event_name
{NULL, (event_T)0}
};
+
+/*
+ * Mapping of error code to pattern used for <amatch> when triggering the Error
+ * event.
+ */
+static struct error_pat
+{
+ const char *code;
+ const char *pat;
+} error_pats[] =
+{
+ {"E426", "tagnotfound"},
+ {NULL, NULL}
+};
+
static AutoPat *first_autopat[NUM_EVENTS] =
{
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
@@ -9351,7 +9367,7 @@ apply_autocmds_group(
{
sfname = vim_strsave(fname);
/* Don't try expanding FileType, Syntax, FuncUndefined, WindowID,
- * ColorScheme or QuickFixCmd* */
+ * ColorScheme, Error or QuickFixCmd* */
if (event == EVENT_FILETYPE
|| event == EVENT_SYNTAX
|| event == EVENT_FUNCUNDEFINED
@@ -9359,6 +9375,7 @@ apply_autocmds_group(
|| event == EVENT_SPELLFILEMISSING
|| event == EVENT_QUICKFIXCMDPRE
|| event == EVENT_COLORSCHEME
+ || event == EVENT_ERROR
|| event == EVENT_OPTIONSET
|| event == EVENT_QUICKFIXCMDPOST)
fname = vim_strsave(fname);
@@ -9750,20 +9767,26 @@ has_autocmd(event_T event, char_u *sfname, buf_T *buf)
char_u *tail = gettail(sfname);
int retval = FALSE;
- fname = FullName_save(sfname, FALSE);
- if (fname == NULL)
- return FALSE;
-
+ /* don't try expanding Error */
+ if (event == EVENT_ERROR) {
+ fname = vim_strsave(sfname);
+ if (fname == NULL)
+ return FALSE;
+ } else {
+ fname = FullName_save(sfname, FALSE);
+ if (fname == NULL)
+ return FALSE;
#ifdef BACKSLASH_IN_FILENAME
- /*
- * Replace all backslashes with forward slashes. This makes the
- * autocommand patterns portable between Unix and MS-DOS.
- */
- sfname = vim_strsave(sfname);
- if (sfname != NULL)
- forward_slash(sfname);
- forward_slash(fname);
+ /*
+ * Replace all backslashes with forward slashes. This makes the
+ * autocommand patterns portable between Unix and MS-DOS.
+ */
+ sfname = vim_strsave(sfname);
+ if (sfname != NULL)
+ forward_slash(sfname);
+ forward_slash(fname);
#endif
+ }
for (ap = first_autopat[(int)event]; ap != NULL; ap = ap->next)
if (ap->pat != NULL && ap->cmds != NULL
@@ -10358,3 +10381,22 @@ write_eintr(int fd, void *buf, size_t bufsize)
return ret;
}
#endif
+
+
+/*
+ * Get the corresponding pattern for the given error message code. The returned
+ * value is used for <amatch> when triggering the Error autocmd event.
+ */
+ char_u *
+get_error_pat(char_u *code)
+{
+ size_t len;
+ int i;
+
+ len = STRLEN(code);
+ for (i = 0; error_pats[i].code; i++)
+ if (STRNCMP(error_pats[i].code, code, len) == 0)
+ return (char_u *)error_pats[i].pat;
+
+ return NULL;
+}
diff --git a/src/globals.h b/src/globals.h
index 4c1b41f..4342b71 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -184,6 +184,10 @@ EXTERN int did_emsg; /* set by emsg() when the message
EXTERN int did_emsg_syntax; /* did_emsg set because of a
syntax error */
EXTERN int called_emsg; /* always set by emsg() */
+#ifdef FEAT_AUTOCMD
+EXTERN char_u *emsg_code INIT(= NULL); /* last error message code set by
+ emsg() */
+#endif
EXTERN int ex_exitval INIT(= 0); /* exit value for ex mode */
EXTERN int emsg_on_display INIT(= FALSE); /* there is an error message */
EXTERN int rc_did_emsg INIT(= FALSE); /* vim_regcomp() called emsg() */
diff --git a/src/main.c b/src/main.c
index e412641..aad656a 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1278,6 +1278,20 @@ main_loop(
fileinfo(FALSE, TRUE, FALSE);
need_fileinfo = FALSE;
}
+#ifdef FEAT_AUTOCMD
+ if (did_emsg && emsg_code) {
+ char_u *pat = get_error_pat(emsg_code);
+ if (pat && has_autocmd(EVENT_ERROR, pat, curbuf))
+ apply_autocmds(EVENT_ERROR, pat, curbuf->b_fname, FALSE,
+ curbuf);
+ else if (has_autocmd(EVENT_ERROR, emsg_code, curbuf))
+ apply_autocmds(EVENT_ERROR, emsg_code, curbuf->b_fname,
+ FALSE, curbuf);
+
+ vim_free(emsg_code);
+ emsg_code = NULL;
+ }
+#endif
emsg_on_display = FALSE; /* can delete error message now */
did_emsg = FALSE;
diff --git a/src/message.c b/src/message.c
index b352590..1c8c7f0 100644
--- a/src/message.c
+++ b/src/message.c
@@ -22,6 +22,7 @@
static int other_sourcing_name(void);
static char_u *get_emsg_source(void);
static char_u *get_emsg_lnum(void);
+static char_u *get_emsg_code(char_u *s);
static void add_msg_hist(char_u *s, int len, int attr);
static void hit_return_msg(void);
static void msg_home_replace_attr(char_u *fname, int attr);
@@ -453,6 +454,32 @@ get_emsg_lnum(void)
}
/*
+ * Extract the error code from a error message.
+ */
+ static char_u *
+get_emsg_code(char_u *s)
+{
+ int i, j;
+
+ i = 0;
+ while (s[i]) {
+ if (s[i] == 'E') {
+ j = i + 1;
+ while (VIM_ISDIGIT(s[j]))
+ j++;
+ if (s[j] == ':')
+ return vim_strnsave(&s[i], j - i);
+ else
+ i = j;
+ } else {
+ i++;
+ }
+ }
+
+ return NULL;
+}
+
+/*
* Display name and line number for the source of an error.
* Remember the file name and line number, so that for the next error the info
* is only displayed if it changed.
@@ -559,6 +586,10 @@ emsg(char_u *s)
return TRUE;
}
+#ifdef FEAT_AUTOCMD
+ emsg_code = get_emsg_code(s);
+#endif
+
/* set "v:errmsg", also when using ":silent! cmd" */
set_vim_var_string(VV_ERRMSG, s, -1);
#endif
diff --git a/src/proto/fileio.pro b/src/proto/fileio.pro
index 9cd6414..dd8453e 100644
--- a/src/proto/fileio.pro
+++ b/src/proto/fileio.pro
@@ -64,4 +64,5 @@ int match_file_list(char_u *list, char_u *sfname, char_u *ffname);
char_u *file_pat_to_reg_pat(char_u *pat, char_u *pat_end, char *allow_dirs, int no_bslash);
long read_eintr(int fd, void *buf, size_t bufsize);
long write_eintr(int fd, void *buf, size_t bufsize);
+char_u *get_error_pat(char_u *code);
/* vim: set ft=c : */
diff --git a/src/vim.h b/src/vim.h
index 02f3036..b9c0c22 100644
--- a/src/vim.h
+++ b/src/vim.h
@@ -1295,6 +1295,7 @@ enum auto_event
EVENT_WINENTER, /* after entering a window */
EVENT_WINLEAVE, /* before leaving a window */
EVENT_ENCODINGCHANGED, /* after changing the 'encoding' option */
+ EVENT_ERROR, /* an error occured */
EVENT_INSERTCHARPRE, /* before inserting a char */
EVENT_CURSORHOLD, /* cursor in same position for a while */
EVENT_CURSORHOLDI, /* idem, in Insert mode */
