vis-lua: support themes in vis:message

The commit that added vis:message[0] used the existing vis_message_show
function which is used internaly to display lua stack traces.  That
function uses the internal error_file.  vis_event_emit does not trigger
events for internal files in order to avoid extra lua errors when already
printing a lua stack trace[1].  Due to this setup any usage of vis:message
showed the text in a window with default theme/syntax/status bar colors.

Instead of using the internal vis_message_show function, create a new
window and file that are not marked internal in the same manner as
cmd_help so themes are applied.

[0]: d815268 (vis-lua: implement vis:message(msg))
[1]: d555c90 (vis: properly redraw status bar of windows displaying internal files)

1 files changed, 5 insertions, 1 deletions

diff --git a/vis-lua.c b/vis-lua.c
index 0642343..84f054c 100644
--- a/vis-lua.c
+++ b/vis-lua.c
@@ -781,7 +781,11 @@ static int info(lua_State *L) {
 static int message(lua_State *L) {
 	Vis *vis = obj_ref_check(L, 1, "vis");
 	const char *msg = luaL_checkstring(L, 2);
-	vis_message_show(vis, msg);
+	if (msg && vis_window_new(vis, NULL)) {
+		text_appendf(vis->win->file->text, "%s\n", msg);
+		text_save(vis->win->file->text, NULL);
+		view_cursor_to(vis->win->view, 0);
+	}
 	return 0;
 }