From aa8a334188779b082f2e481884ecbfcaf00fb3e5 Mon Sep 17 00:00:00 2001
From: Tadej Novak <tadej@tano.si>
Date: Wed, 14 Oct 2015 20:45:33 +0200
Subject: [PATCH] Support adaptive scrolling

This fix improves adaptive scrolling, especially on Apple devices. Tested with MacBook trackpad, Magic mouse and classic Logitech mouse.

May need testing on other platforms. Inspired by Atom's own scrolling code.
---
 src/term.js | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/term.js b/src/term.js
index 626be53..82047b8 100644
--- a/src/term.js
+++ b/src/term.js
@@ -1119,11 +1119,16 @@ Terminal.prototype.bindMouse = function() {
   on(el, wheelEvent, function(ev) {
     if (self.mouseEvents) return;
     if (self.applicationKeypad) return;
+    var delta, direction;
     if (ev.type === 'DOMMouseScroll') {
-      self.scrollDisp(ev.detail < 0 ? -5 : 5);
+      delta = Math.abs(ev.detail);
+      direction = ev.detail < 0 ? -1 : 1;
     } else {
-      self.scrollDisp(ev.wheelDeltaY > 0 ? -5 : 5);
+      delta = Math.abs(ev.wheelDeltaY);
+      direction = ev.wheelDeltaY > 0 ? -1 : 1;
     }
+    self.scrollDisp(Math.ceil(delta * 0.1) * direction);
+    
     return cancel(ev);
   });
 };