From 0c0d2a1c16f66a4ec8a78d545964fb8cb6490ab3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Yaroslav=20de=20la=20Pe=C3=B1a=20Smirnov?=
 <yps@yaroslavps.com>
Date: Tue, 9 Mar 2021 02:04:32 +0300
Subject: script to change intellimouse dpi

---
 dotfiles/.config/sway/config             |  2 +-
 dotfiles/.local/bin/intellimouse-classic | 91 ++++++++++++++++++++++++++++++++
 2 files changed, 92 insertions(+), 1 deletion(-)
 create mode 100755 dotfiles/.local/bin/intellimouse-classic

diff --git a/dotfiles/.config/sway/config b/dotfiles/.config/sway/config
index 54e136c..0b1ba66 100644
--- a/dotfiles/.config/sway/config
+++ b/dotfiles/.config/sway/config
@@ -124,7 +124,7 @@ input 6127:24647:Lenovo_ThinkPad_Compact_USB_Keyboard_with_TrackPoint {
 # Desktop mouse
 input 1118:2083:Microsoft_Microsoft___Classic_IntelliMouse__ {
 	accel_profile flat
-	pointer_accel 0
+	pointer_accel -0.5
 }
 
 # Keymaps
diff --git a/dotfiles/.local/bin/intellimouse-classic b/dotfiles/.local/bin/intellimouse-classic
new file mode 100755
index 0000000..3b320a3
--- /dev/null
+++ b/dotfiles/.local/bin/intellimouse-classic
@@ -0,0 +1,91 @@
+#!/usr/bin/env python3
+import sys
+import usb.core
+import usb.util
+
+# Script to set the DPI of the Microsoft Classic Intellimouse
+# Taken from https://gist.github.com/K-Visscher/22561ca69a64339a7383d67db6e79818
+
+VID = 0x045E
+PID = 0x0823
+
+DPI_WRITE_PROPERTY = 0x96
+
+WRITE_REPORT_ID = 0x24
+WRITE_REPORT_LENGTH = 0x20
+
+INTERFACE = 0x01
+
+class IntelliMouse():
+    def __init__(self):
+        self.reattach = False
+        self.device = usb.core.find(idVendor=VID, idProduct=PID)
+        if self.device is None:
+            raise ValueError("couldn't find the intellimouse...")
+
+    def set_configuration(self):
+        if sys.platform.startswith("linux"):
+            for config in self.device:
+                for interface in config:
+                    if self.device.is_kernel_driver_active(interface.bInterfaceNumber):
+                        self.device.detach_kernel_driver(interface.bInterfaceNumber)
+                        self.reattach = True
+
+        self.device.set_configuration()
+
+    def detach(self):
+        usb.util.dispose_resources(self.device)
+        if self.reattach:
+            for config in self.device:
+                for interface in config:
+                    if not self.device.is_kernel_driver_active(interface.bInterfaceNumber):
+                        self.device.attach_kernel_driver(interface.bInterfaceNumber)
+
+    def __enter__(self):
+        self.set_configuration()
+
+    def __exit__(self, exc_type, exc_value, exc_traceback):
+        self.detach()
+
+    def __write_property(self, property, data):
+        if not isinstance(property, int):
+            raise TypeError("please make sure to pass a integer for the property argument...")
+        if not isinstance(data, list) or not all(isinstance(x, int) for x in data):
+            raise TypeError("please make sure to pass a list of integers for the data argument...")
+        report = self.__pad_right([WRITE_REPORT_ID, property, len(data)] + data, WRITE_REPORT_LENGTH)
+        self.device.ctrl_transfer(0x21, 0x09, 0x03 << 8 | WRITE_REPORT_ID, INTERFACE, report)
+
+
+    def __pad_right(self, data, until):
+        if not isinstance(data, list) or not all(isinstance(x, int) for x in data):
+            raise TypeError("please make sure to pass a list of integers for the data argument...")
+        if not isinstance(until, int):
+            raise TypeError("please make sure to pass a integer for the until argument...")
+        if until <= 0:
+            raise ValueError("please pass a positive integer for the until argument...")
+        if len(data) >= until:
+            return
+        return data + ((until - len(data)) * [0x00])
+
+    def set_dpi(self, dpi):
+        if not isinstance(dpi, int):
+            raise TypeError("please make sure to pass an integer...")
+        if dpi % 200 != 0 or not (dpi >= 400 and dpi <= 3200):
+              raise ValueError("please make sure to pass a valid value (dpi % 200 == 0 and (dpi >= 400 and dpi <= 3200))")
+        self.__write_property(DPI_WRITE_PROPERTY, [0x00] + list(dpi.to_bytes(2, byteorder="little")))
+
+if __name__ == "__main__":
+    if len(sys.argv) < 2:
+        sys.stderr.write("Usage: {} [400 — 3200 DPI]\n".format(sys.argv[0]))
+        sys.exit(1)
+    try:
+        dpi = int(sys.argv[1])
+        if dpi < 400 or dpi > 3200:
+            raise ValueError
+    except ValueError:
+        sys.stderr.write("DPI value must be a number between 400 and 3200 inclusively")
+        exit(1)
+
+    mouse = IntelliMouse()
+    with mouse:
+        mouse.set_dpi(dpi)
-- 
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