From a3d56262564955b803995ddb58f7c64d056b9984 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Ekl=C3=B6f?= <daniel@ekloef.se>
Date: Sat, 8 Aug 2020 10:07:25 +0200
Subject: [PATCH] input: pointer-enter: add comment describing what we're doing

---
 input.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/input.c b/input.c
index 38e8e8dd..eb4e394b 100644
--- a/input.c
+++ b/input.c
@@ -1048,6 +1048,12 @@ wl_pointer_enter(void *data, struct wl_pointer *wl_pointer,
 
     switch ((term->active_surface = term_surface_kind(term, surface))) {
     case TERM_SURF_GRID: {
+        /*
+         * Translate x,y pixel coordinate to a cell coordinate, or -1
+         * if the cursor is outside the grid. I.e. if it is inside the
+         * margins.
+         */
+
         if (x < term->margins.left || x >= term->width - term->margins.right)
             seat->mouse.col = -1;
         else