From 0820db25833232b7126e8ab8935598a103415c58 Mon Sep 17 00:00:00 2001
From: abicky <takeshi.arabiki@gmail.com>
Date: Tue, 18 Sep 2018 01:23:22 +0900
Subject: [PATCH] Delete prompts inserted on set_window_size

This PR resolves https://github.com/abicky/nodejs-repl.el/issues/15.
---
 nodejs-repl.el | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/nodejs-repl.el b/nodejs-repl.el
index 48875d2..d0e57e9 100644
--- a/nodejs-repl.el
+++ b/nodejs-repl.el
@@ -146,7 +146,7 @@ See also `comint-process-echoes'"
 (defvar nodejs-repl-cache-completions ())
 
 (defvar nodejs-repl-get-completions-for-require-p nil)
-(defvar nodejs-repl-completion-at-point-called-p nil)
+(defvar nodejs-repl-prompt-deletion-required-p nil)
 
 ;;;--------------------------
 ;;; Private functions
@@ -269,6 +269,9 @@ when receive the output string"
   (setq nodejs-repl-cache-token "")
   (setq nodejs-repl-cache-completions ()))
 
+(defun nodejs-repl--set-prompt-deletion-required-p ()
+  (setq nodejs-repl-prompt-deletion-required-p t))
+
 (defun nodejs-repl--remove-duplicated-prompt (string)
   ;; `.load` command of Node.js repl outputs a duplicated prompt
   (let ((beg (or comint-last-output-start
@@ -279,10 +282,10 @@ when receive the output string"
       (when (re-search-forward (concat nodejs-repl-prompt nodejs-repl-prompt) end t)
         (replace-match nodejs-repl-prompt)))))
 
-(defun nodejs-repl--remove-unexpected-prompts (string)
-  ;; Unexpected prompts are inserted if `completion-auto-help' is t
-  (when nodejs-repl-completion-at-point-called-p
-    (setq nodejs-repl-completion-at-point-called-p nil)
+(defun nodejs-repl--delete-prompt (string)
+  ;; A prompt will be inserted if window--adjust-process-windows is called
+  (when nodejs-repl-prompt-deletion-required-p
+    (setq nodejs-repl-prompt-deletion-required-p nil)
     (let ((beg (or comint-last-output-start
                    (point-min-marker)))
           (end (process-mark (get-buffer-process (current-buffer)))))
@@ -480,13 +483,15 @@ otherwise spawn one."
   "Major mode for Node.js REPL"
   :syntax-table nodejs-repl-mode-syntax-table
   (set (make-local-variable 'font-lock-defaults) '(nil nil t))
-  (add-hook 'comint-output-filter-functions 'nodejs-repl--remove-unexpected-prompts nil t)
+  (add-hook 'comint-output-filter-functions 'nodejs-repl--delete-prompt nil t)
   (add-hook 'comint-output-filter-functions 'nodejs-repl--remove-duplicated-prompt nil t)
   (add-hook 'comint-output-filter-functions 'nodejs-repl--filter-escape-sequnces nil t)
   (add-hook 'comint-output-filter-functions 'nodejs-repl--clear-cache nil t)
   (setq comint-input-ignoredups nodejs-repl-input-ignoredups)
   (setq comint-process-echoes nodejs-repl-process-echoes)
   (add-hook 'completion-at-point-functions 'nodejs-repl--completion-at-point-function nil t)
+  (make-local-variable 'window-configuration-change-hook)
+  (add-hook 'window-configuration-change-hook 'nodejs-repl--set-prompt-deletion-required-p)
   (ansi-color-for-comint-mode-on))
 
 ;;;###autoload