vim-patch:7.4.2049

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

https://github.com/vim/vim/commit/f6acffbe83e622542d9fdf3066f51933e46e4954

5 files changed, 94 insertions, 10 deletions

diff --git a/src/nvim/ex_cmds.lua b/src/nvim/ex_cmds.lua
index 88095602ba..5f81306fc1 100644
--- a/src/nvim/ex_cmds.lua
+++ b/src/nvim/ex_cmds.lua
@@ -462,6 +462,12 @@ return {
     func='ex_checktime',
   },
   {
+    command='chistory',
+    flags=bit.bor(TRLBAR),
+    addr_type=ADDR_LINES,
+    func='qf_history',
+  },
+  {
     command='clist',
     flags=bit.bor(BANG, EXTRA, TRLBAR, CMDWIN),
     addr_type=ADDR_LINES,
@@ -1400,6 +1406,12 @@ return {
     func='ex_helpgrep',
   },
   {
+    command='lhistory',
+    flags=bit.bor(TRLBAR),
+    addr_type=ADDR_LINES,
+    func='qf_history',
+  },
+  {
     command='ll',
     flags=bit.bor(RANGE, NOTADR, COUNT, TRLBAR, BANG),
     addr_type=ADDR_LINES,
diff --git a/src/nvim/message.c b/src/nvim/message.c
index 2f8feda6ec..749fa8a706 100644
--- a/src/nvim/message.c
+++ b/src/nvim/message.c
@@ -297,8 +297,22 @@ void trunc_string(char_u *s, char_u *buf, int room, int buflen)
       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 {
+        memmove(buf + e, s + e, len);
+      }
+    }
+  } else if (e + 3 < buflen) {
+    // set the middle and copy the last part
     memmove(buf + e, "...", (size_t)3);
     len = (int)STRLEN(s + i) + 1;
     if (len >= buflen - e - 3)
@@ -306,7 +320,8 @@ void trunc_string(char_u *s, char_u *buf, int room, int buflen)
     memmove(buf + e + 3, s + i, len);
     buf[e + 3 + len - 1] = NUL;
   } else {
-    buf[e - 1] = NUL;      /* make sure it is truncated */
+    // can't fit in the "...", just truncate it
+    buf[e - 1] = NUL;
   }
 }
 
diff --git a/src/nvim/quickfix.c b/src/nvim/quickfix.c
index 33a84660c1..2fa0fb9840 100644
--- a/src/nvim/quickfix.c
+++ b/src/nvim/quickfix.c
@@ -2105,6 +2105,28 @@ static void 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.
@@ -2145,15 +2167,26 @@ void qf_age(exarg_T *eap)
       ++qi->qf_curlist;
     }
   }
-  qf_msg(qi);
+  qf_msg(qi, qi->qf_curlist, "");
+  qf_update_buffer(qi, NULL);
 }
 
-static void qf_msg(qf_info_T *qi)
+void qf_history(exarg_T *eap)
 {
-  smsg(_("error list %d of %d; %d errors"),
-       qi->qf_curlist + 1, qi->qf_listcount,
-       qi->qf_lists[qi->qf_curlist].qf_count);
-  qf_update_buffer(qi, NULL);
+  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 ? "> " : "  ");
+    }
+  }
 }
 
 /*
diff --git a/src/nvim/testdir/test_quickfix.vim b/src/nvim/testdir/test_quickfix.vim
index f30902b915..17f0bde6d3 100644
--- a/src/nvim/testdir/test_quickfix.vim
+++ b/src/nvim/testdir/test_quickfix.vim
@@ -1420,3 +1420,27 @@ 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
diff --git a/src/nvim/version.c b/src/nvim/version.c
index 3dfc32fc6d..98cfdd1b4a 100644
--- a/src/nvim/version.c
+++ b/src/nvim/version.c
@@ -391,7 +391,7 @@ static int included_patches[] = {
   // 2052 NA
   // 2051,
   // 2050,
-  // 2049,
+  2049,
   // 2048 NA
   // 2047,
   // 2046,