From 55739aa786f9a3efdd41ff8d2d98bed193243da2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Robin=20Gr=C3=B6nberg?=
 <5390421+Gronis@users.noreply.github.com>
Date: Sat, 5 Aug 2023 15:35:43 +0200
Subject: [PATCH] Add support for scrolling left and right. (#788)

---
 src/event.rs                   |  4 ++++
 src/event/sys/unix/parse.rs    |  2 ++
 src/event/sys/windows/parse.rs | 10 +++++++++-
 3 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/src/event.rs b/src/event.rs
index b93c8ac..3464467 100644
--- a/src/event.rs
+++ b/src/event.rs
@@ -575,6 +575,10 @@ pub enum MouseEventKind {
     ScrollDown,
     /// Scrolled mouse wheel upwards (away from the user).
     ScrollUp,
+    /// Scrolled mouse wheel left (mostly on a laptop touchpad).
+    ScrollLeft,
+    /// Scrolled mouse wheel right (mostly on a laptop touchpad).
+    ScrollRight,
 }
 
 /// Represents a mouse button.
diff --git a/src/event/sys/unix/parse.rs b/src/event/sys/unix/parse.rs
index c40cebc..2019b5f 100644
--- a/src/event/sys/unix/parse.rs
+++ b/src/event/sys/unix/parse.rs
@@ -788,6 +788,8 @@ fn parse_cb(cb: u8) -> io::Result<(MouseEventKind, KeyModifiers)> {
         (3, true) | (4, true) | (5, true) => MouseEventKind::Moved,
         (4, false) => MouseEventKind::ScrollUp,
         (5, false) => MouseEventKind::ScrollDown,
+        (6, false) => MouseEventKind::ScrollLeft,
+        (7, false) => MouseEventKind::ScrollRight,
         // We do not support other buttons.
         _ => return Err(could_not_parse_event_error()),
     };
diff --git a/src/event/sys/windows/parse.rs b/src/event/sys/windows/parse.rs
index 288b747..74289e5 100644
--- a/src/event/sys/windows/parse.rs
+++ b/src/event/sys/windows/parse.rs
@@ -358,7 +358,15 @@ fn parse_mouse_event_record(
             }
         }
         EventFlags::DoubleClick => None, // double click not supported by unix terminals
-        EventFlags::MouseHwheeled => None, // horizontal scroll not supported by unix terminals
+        EventFlags::MouseHwheeled => {
+            if button_state.scroll_left() {
+                Some(MouseEventKind::ScrollLeft)
+            } else if button_state.scroll_right() {
+                Some(MouseEventKind::ScrollRight)
+            } else {
+                None
+            }
+        }
         _ => None,
     };