patch 7.4.2049

Problem:    There is no way to get a list of the error lists.
Solution:   Add ":chistory" and ":lhistory".

src/ex_cmds.h

@@ -310,6 +310,9 @@ EX(CMD_checkpath,	"checkpath",	ex_checkpath,
 EX(CMD_checktime,	"checktime",	ex_checktime,
 			RANGE|NOTADR|BUFNAME|COUNT|EXTRA|TRLBAR,
 			ADDR_LINES),
+EX(CMD_chistory,	"chistory",	qf_history,
+			TRLBAR,
+			ADDR_LINES),
 EX(CMD_clist,		"clist",	qf_list,
 			BANG|EXTRA|TRLBAR|CMDWIN,
 			ADDR_LINES),
@@ -784,6 +787,9 @@ EX(CMD_lgrepadd,	"lgrepadd",	ex_make,
 EX(CMD_lhelpgrep,	"lhelpgrep",	ex_helpgrep,
 			EXTRA|NOTRLCOM|NEEDARG,
 			ADDR_LINES),
+EX(CMD_lhistory,	"lhistory",	qf_history,
+			TRLBAR,
+			ADDR_LINES),
 EX(CMD_ll,		"ll",		ex_cc,
 			RANGE|NOTADR|COUNT|TRLBAR|BANG,
 			ADDR_LINES),

src/ex_docmd.c

@@ -122,6 +122,7 @@ static int	getargopt(exarg_T *eap);
 # define ex_cfile		ex_ni
 # define qf_list		ex_ni
 # define qf_age			ex_ni
+# define qf_history		ex_ni
 # define ex_helpgrep		ex_ni
 # define ex_vimgrep		ex_ni
 #endif

src/message.c

@@ -313,9 +313,25 @@ trunc_string(
 	    len += n;
     }
 
-    /* Set the middle and copy the last part. */
-    if (e + 3 < buflen)
+
+    if (i <= e + 3)
     {
+	/* text fits without truncating */
+	if (s != buf)
+	{
+	    len = STRLEN(s);
+	    if (len >= buflen)
+		len = buflen - 1;
+	    len = len - e + 1;
+	    if (len < 1)
+		buf[e - 1] = NUL;
+	    else
+		mch_memmove(buf + e, s + e, len);
+	}
+    }
+    else if (e + 3 < buflen)
+    {
+	/* set the middle and copy the last part */
 	mch_memmove(buf + e, "...", (size_t)3);
 	len = (int)STRLEN(s + i) + 1;
 	if (len >= buflen - e - 3)
@@ -325,7 +341,8 @@ trunc_string(
     }
     else
     {
-	buf[e - 1] = NUL;  /* make sure it is truncated */
+	/* can't fit in the "...", just truncate it */
+	buf[e - 1] = NUL;
     }
 }
 

src/proto/quickfix.pro

@@ -5,6 +5,7 @@ void copy_loclist(win_T *from, win_T *to);
 void qf_jump(qf_info_T *qi, int dir, int errornr, int forceit);
 void qf_list(exarg_T *eap);
 void qf_age(exarg_T *eap);
+void qf_history(exarg_T *eap);
 void qf_mark_adjust(win_T *wp, linenr_T line1, linenr_T line2, long amount, long amount_after);
 void ex_cwindow(exarg_T *eap);
 void ex_cclose(exarg_T *eap);

src/quickfix.c

@@ -120,7 +120,6 @@ static void	qf_new_list(qf_info_T *qi, char_u *qf_title);
 static void	ll_free_all(qf_info_T **pqi);
 static int	qf_add_entry(qf_info_T *qi, char_u *dir, char_u *fname, int bufnum, char_u *mesg, long lnum, int col, int vis_col, char_u *pattern, int nr, int type, int valid);
 static qf_info_T *ll_new_list(void);
-static void	qf_msg(qf_info_T *qi);
 static void	qf_free(qf_info_T *qi, int idx);
 static char_u	*qf_types(int, int);
 static int	qf_get_fnum(qf_info_T *qi, char_u *, char_u *);
@@ -2544,6 +2543,29 @@ qf_fmt_text(char_u *text, char_u *buf, int bufsize)
     buf[i] = NUL;
 }
 
+    static void
+qf_msg(qf_info_T *qi, int which, char *lead)
+{
+    char   *title = (char *)qi->qf_lists[which].qf_title;
+    int    count = qi->qf_lists[which].qf_count;
+    char_u buf[IOSIZE];
+
+    vim_snprintf((char *)buf, IOSIZE, _("%serror list %d of %d; %d errors "),
+	    lead,
+	    which + 1,
+	    qi->qf_listcount,
+	    count);
+
+    if (title != NULL)
+    {
+	while (STRLEN(buf) < 34)
+	    STRCAT(buf, " ");
+	STRCAT(buf, title);
+    }
+    trunc_string(buf, buf, Columns - 1, IOSIZE);
+    msg(buf);
+}
+
 /*
  * ":colder [count]": Up in the quickfix stack.
  * ":cnewer [count]": Down in the quickfix stack.
@@ -2591,20 +2613,28 @@ qf_age(exarg_T *eap)
 	    ++qi->qf_curlist;
 	}
     }
-    qf_msg(qi);
-}
-
-    static void
-qf_msg(qf_info_T *qi)
-{
-    smsg((char_u *)_("error list %d of %d; %d errors"),
-	    qi->qf_curlist + 1, qi->qf_listcount,
-	    qi->qf_lists[qi->qf_curlist].qf_count);
+    qf_msg(qi, qi->qf_curlist, "");
 #ifdef FEAT_WINDOWS
     qf_update_buffer(qi, NULL);
 #endif
 }
 
+    void
+qf_history(exarg_T *eap)
+{
+    qf_info_T	*qi = &ql_info;
+    int		i;
+
+    if (eap->cmdidx == CMD_lhistory)
+	qi = GET_LOC_LIST(curwin);
+    if (qi == NULL || (qi->qf_listcount == 0
+				&& qi->qf_lists[qi->qf_curlist].qf_count == 0))
+	MSG(_("No entries"));
+    else
+	for (i = 0; i < qi->qf_listcount; ++i)
+	    qf_msg(qi, i, i == qi->qf_curlist ? "> " : "  ");
+}
+
 /*
  * Free error list "idx".
  */

src/testdir/test_quickfix.vim

@@ -1438,3 +1438,27 @@ function Test_cbottom()
   call XbottomTests('c')
   call XbottomTests('l')
 endfunction
+
+function HistoryTest(cchar)
+  call s:setup_commands(a:cchar)
+
+  call assert_fails(a:cchar . 'older 99', 'E380:')
+  " clear all lists after the first one, then replace the first one.
+  call g:Xsetlist([])
+  Xolder
+  let entry = {'filename': 'foo', 'lnum': 42}
+  call g:Xsetlist([entry], 'r')
+  call g:Xsetlist([entry, entry])
+  call g:Xsetlist([entry, entry, entry])
+  let res = split(execute(a:cchar . 'hist'), "\n")
+  call assert_equal(3, len(res))
+  let common = 'errors     :set' . (a:cchar == 'c' ? 'qf' : 'loc') . 'list()'
+  call assert_equal('  error list 1 of 3; 1 ' . common, res[0])
+  call assert_equal('  error list 2 of 3; 2 ' . common, res[1])
+  call assert_equal('> error list 3 of 3; 3 ' . common, res[2])
+endfunc
+
+func Test_history()
+  call HistoryTest('c')
+  call HistoryTest('l')
+endfunc

src/version.c

@@ -758,6 +758,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2049,
 /**/
     2048,
 /**/