degesch: fix switching of buffers by command

Readline used to erase the new buffer's contents.

Defer processing.

degesch.c

@@ -1532,6 +1532,9 @@ struct app_context
 
 	struct input input;                 ///< User interface
 
+	struct poller_idle input_event;     ///< Pending input event
+	struct str_vector pending_input;    ///< Pending input lines
+
 	int *nick_palette;                  ///< A 256-color palette for nicknames
 	size_t nick_palette_len;            ///< Number of entries in nick_palette
 
@@ -1609,6 +1612,7 @@ app_context_init (struct app_context *self)
 	free (encoding);
 
 	input_init (&self->input);
+	str_vector_init (&self->pending_input);
 	str_init (&self->input_buffer);
 
 	self->nick_palette =
@@ -1647,6 +1651,7 @@ app_context_free (struct app_context *self)
 	iconv_close (self->term_to_utf8);
 
 	input_free (&self->input);
+	str_vector_free (&self->pending_input);
 	str_free (&self->input_buffer);
 
 	free (self->editor_filename);
@@ -11067,15 +11072,17 @@ on_readline_input (char *line)
 		if (*line)
 			add_history (line);
 
-		// Normally, the text is deleted _afterwards_
+		// readline always erases the input line after returning from here,
-		rl_replace_line ("", false);
+		// but we don't want that in order to allow correct buffer switching
-		process_input (ctx, line);
+		str_vector_add_owned (&ctx->pending_input, line);
-		free (line);
+		poller_idle_set (&ctx->input_event);
 	}
 	else
 	{
+		// Prevent readline from showing the prompt twice for w/e reason
 		input_hide (&ctx->input);
 		input_restore (&ctx->input);
+
 		input_ding (&ctx->input);
 	}
 
@@ -11324,10 +11331,9 @@ on_editline_return (EditLine *editline, int key)
 
 	// process_input() expects a multibyte string
 	const LineInfo *info_mb = el_line (editline);
-	char copy[info_mb->lastchar - info_mb->buffer + 1];
+	str_vector_add_owned (&ctx->pending_input,
-	memcpy (copy, info_mb->buffer, sizeof copy - 1);
+		xstrndup (info_mb->buffer, info_mb->lastchar - info_mb->buffer));
-	copy[sizeof copy - 1] = '\0';
+	poller_idle_set (&ctx->input_event);
-	process_input (ctx, copy);
 
 	el_cursor (editline, len - point);
 	el_wdeletestr (editline, len);
@@ -11873,6 +11879,15 @@ on_date_change_timer (struct app_context *ctx)
 	rearm_date_change_timer (ctx);
 }
 
+static void
+on_pending_input (struct app_context *ctx)
+{
+	poller_idle_reset (&ctx->input_event);
+	for (size_t i = 0; i < ctx->pending_input.len; i++)
+		process_input (ctx, ctx->pending_input.vector[i]);
+	str_vector_reset (&ctx->pending_input);
+}
+
 static void
 init_poller_events (struct app_context *ctx)
 {
@@ -11899,6 +11914,10 @@ init_poller_events (struct app_context *ctx)
 	poller_timer_init (&ctx->autoaway_tmr, &ctx->poller);
 	ctx->autoaway_tmr.dispatcher = (poller_timer_fn) on_autoaway_timer;
 	ctx->autoaway_tmr.user_data = ctx;
+
+	poller_idle_init (&ctx->input_event, &ctx->poller);
+	ctx->input_event.dispatcher = (poller_idle_fn) on_pending_input;
+	ctx->input_event.user_data = ctx;
 }
 
 // --- Tests -------------------------------------------------------------------