vim-patch:8.1.0027: difficult to make a plugin that feeds a line to a job

Problem:    Difficult to make a plugin that feeds a line to a job.
Solution:   Add the nitial code for the "prompt" buftype.
https://github.com/vim/vim/commit/f273245f6433d5d43a5671306b520a3230c35787

1 files changed, 45 insertions, 0 deletions

diff --git a/src/nvim/eval/funcs.c b/src/nvim/eval/funcs.c
index 8232136783..a89d62fdfd 100644
--- a/src/nvim/eval/funcs.c
+++ b/src/nvim/eval/funcs.c
@@ -6076,6 +6076,51 @@ static void f_printf(typval_T *argvars, typval_T *rettv, FunPtr fptr)
   }
 }
 
+// "prompt_setcallback({buffer}, {callback})" function
+static void f_prompt_setcallback(typval_T *argvars,
+                                 typval_T *rettv, FunPtr fptr)
+{
+    buf_T *buf;
+    Callback prompt_callback = { .type = kCallbackNone };
+
+    if (check_secure()) {
+      return;
+    }
+    buf = tv_get_buf(&argvars[0], false);
+    if (buf == NULL) {
+      return;
+    }
+
+    if (argvars[1].v_type != VAR_STRING || *argvars[1].vval.v_string != NUL) {
+      if (!callback_from_typval(&prompt_callback, &argvars[1])) {
+        return;
+      }
+    }
+
+    callback_free(&buf->b_prompt_callback);
+    buf->b_prompt_callback = prompt_callback;
+}
+
+// "prompt_setprompt({buffer}, {text})" function
+static void f_prompt_setprompt(typval_T *argvars,
+                               typval_T *rettv, FunPtr fptr)
+{
+    buf_T *buf;
+    const char_u *text;
+
+    if (check_secure()) {
+      return;
+    }
+    buf = tv_get_buf(&argvars[0], false);
+    if (buf == NULL) {
+      return;
+    }
+
+    text = (const char_u *)tv_get_string(&argvars[1]);
+    xfree(buf->b_prompt_text);
+    buf->b_prompt_text = vim_strsave(text);
+}
+
 // "pum_getpos()" function
 static void f_pum_getpos(typval_T *argvars, typval_T *rettv, FunPtr fptr)
 {