patch 9.1.1612: Ctrl-G/Ctrl-T do not ignore the end search delimiter

Problem:  Ctrl-G/Ctrl-T does not ignore the end search delimiter
          (irisjae)
Solution: Check if the pattern ends with a search delimiter and ignore
          it, unless it is part of the pattern.

fixes: #17895
closes: #17933

Signed-off-by: Christian Brabandt <cb@256bit.org>

src/ex_getln.c

@@ -620,6 +620,7 @@ may_adjust_incsearch_highlighting(
     int	    search_flags = SEARCH_NOOF;
     int	    i;
     int	    save;
+    int	    bslsh = FALSE;
     int	    search_delim;
 
     // Parsing range may already set the last search pattern.
@@ -652,6 +653,18 @@ may_adjust_incsearch_highlighting(
     else
 	pat = ccline.cmdbuff + skiplen;
 
+    // do not search for the search end delimiter,
+    // unless it is part of the pattern
+    if (patlen > 2 && firstc == pat[patlen - 1])
+    {
+	patlen--;
+	if (pat[patlen - 1] == '\\')
+	{
+	    pat[patlen - 1] = firstc;
+	    bslsh = TRUE;
+	}
+    }
+
     cursor_off();
     out_flush();
     if (c == Ctrl_G)
@@ -675,6 +688,8 @@ may_adjust_incsearch_highlighting(
 		 pat, patlen, count, search_flags, RE_SEARCH, NULL);
     --emsg_off;
     pat[patlen] = save;
+    if (bslsh)
+	pat[patlen - 1] = '\\';
     if (i)
     {
 	is_state->search_start = is_state->match_start;

src/testdir/dumps/Test_incsearch_delim_01.dump

@@ -0,0 +1,6 @@
+|1+0&#ffffff0| |v+0&#ffff4012|i|m| |i+0&#ffffff0|n|c| @65
+|2| |v+1&&|i|m| |/+0&&| @67
+|3| |v+0&#ffff4012|i|m| |/+0&#ffffff0| @67
+|4| |v+0&#ffff4012|i|m| |?+0&#ffffff0| @67
+|5| |v+0&#ffff4012|i|m| |?+0&#ffffff0| @67
+|/|v|i|m| |/> @68

src/testdir/dumps/Test_incsearch_delim_02.dump

@@ -0,0 +1,6 @@
+|1+0&#ffffff0| |v+0&#ffff4012|i|m| |i+0&#ffffff0|n|c| @65
+|2| |v+0&#ffff4012|i|m| |/+0&#ffffff0| @67
+|3| |v+1&&|i|m| |/+0&&| @67
+|4| |v+0&#ffff4012|i|m| |?+0&#ffffff0| @67
+|5| |v+0&#ffff4012|i|m| |?+0&#ffffff0| @67
+|?|v|i|m| |?> @68

src/testdir/dumps/Test_incsearch_delim_03.dump

@@ -0,0 +1,6 @@
+|1+0&#ffffff0| |v|i|m| |i|n|c| @65
+|2| |v+0&#ffff4012|i|m| |/| +0&#ffffff0@67
+|3| |v+1&&|i|m| |/| +0&&@67
+|4| |v|i|m| |?| @67
+|5| |v|i|m| |?| @67
+|/|v|i|m| |\|/> @67

src/testdir/dumps/Test_incsearch_delim_04.dump

@@ -0,0 +1,6 @@
+|1+0&#ffffff0| |v|i|m| |i|n|c| @65
+|2| |v|i|m| |/| @67
+|3| |v|i|m| |/| @67
+|4| |v+0&#ffff4012|i|m| |?| +0&#ffffff0@67
+|5| |v+1&&|i|m| |?| +0&&@67
+|?|v|i|m| |\|?> @67

src/testdir/test_search.vim

@@ -2254,5 +2254,86 @@ func Test_search_with_invalid_range()
   bwipe!
 endfunc
 
+func Test_incsearch_delimiter_ctrlg()
+  CheckOption incsearch
+  CheckScreendump
+  CheckRunVimInTerminal
+  call assert_equal(0, &scrolloff)
+  call writefile([
+	\ 'set incsearch hls',
+  \ 'call setline(1, ["1 vim inc", "2 vim /", "3 vim /", "4 vim ?", "5 vim ?"])',
+	\ 'normal gg',
+	\ 'redraw',
+	\ ], 'Xscript_incsearch_delim', 'D')
+  let buf = RunVimInTerminal('-S Xscript_incsearch_delim', {'rows': 6})
+
+  call term_sendkeys(buf, '/')
+  sleep 100m
+  call term_sendkeys(buf, 'v')
+  sleep 100m
+  call term_sendkeys(buf, 'i')
+  sleep 100m
+  call term_sendkeys(buf, 'm')
+  sleep 100m
+  call term_sendkeys(buf, ' ')
+  sleep 100m
+  call term_sendkeys(buf, '/')
+  sleep 100m
+  call term_sendkeys(buf, "\<C-G>")
+  call VerifyScreenDump(buf, 'Test_incsearch_delim_01', {})
+  call term_sendkeys(buf, "\<Esc>")
+
+  call term_sendkeys(buf, ":5\<cr>")
+  call term_sendkeys(buf, '?')
+  sleep 100m
+  call term_sendkeys(buf, 'v')
+  sleep 100m
+  call term_sendkeys(buf, 'i')
+  sleep 100m
+  call term_sendkeys(buf, 'm')
+  sleep 100m
+  call term_sendkeys(buf, ' ')
+  sleep 100m
+  call term_sendkeys(buf, '?')
+  sleep 100m
+  call term_sendkeys(buf, "\<C-T>")
+  call VerifyScreenDump(buf, 'Test_incsearch_delim_02', {})
+  call term_sendkeys(buf, "\<Esc>")
+
+  call term_sendkeys(buf, '/')
+  sleep 100m
+  call term_sendkeys(buf, 'v')
+  sleep 100m
+  call term_sendkeys(buf, 'i')
+  sleep 100m
+  call term_sendkeys(buf, 'm')
+  sleep 100m
+  call term_sendkeys(buf, ' ')
+  sleep 100m
+  call term_sendkeys(buf, '\/')
+  sleep 100m
+  call term_sendkeys(buf, "\<C-G>")
+  call VerifyScreenDump(buf, 'Test_incsearch_delim_03', {})
+  call term_sendkeys(buf, "\<Esc>")
+
+  call term_sendkeys(buf, ":5\<cr>")
+  call term_sendkeys(buf, '?')
+  sleep 100m
+  call term_sendkeys(buf, 'v')
+  sleep 100m
+  call term_sendkeys(buf, 'i')
+  sleep 100m
+  call term_sendkeys(buf, 'm')
+  sleep 100m
+  call term_sendkeys(buf, ' ')
+  sleep 100m
+  call term_sendkeys(buf, '\?')
+  sleep 100m
+  call term_sendkeys(buf, "\<C-T>")
+  call VerifyScreenDump(buf, 'Test_incsearch_delim_04', {})
+  call term_sendkeys(buf, "\<Esc>")
+
+  call StopVimInTerminal(buf)
+endfunc
 
 " vim: shiftwidth=2 sts=2 expandtab

src/version.c

@@ -719,6 +719,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1612,
 /**/
     1611,
 /**/