Implement xremap's VirtualDevice

src/input.rs

@@ -60,8 +60,8 @@ pub fn select_device(device_opts: &Vec<String>) -> Result<Vec<Device>, Box<dyn E
 
 pub fn event_loop(mut input_devices: Vec<Device>, _config: &Config) -> Result<(), Box<dyn Error>> {
     let mut input_device = input_devices.remove(0);
-    let mut output_device = build_device(&input_device)
-        .map_err(|e| format!("Failed to build an output device: {}", e))?;
+    let mut output_device =
+        build_device().map_err(|e| format!("Failed to build an output device: {}", e))?;
     input_device
         .grab()
         .map_err(|e| format!("Failed to grab an input device: {}", e))?;
@@ -135,7 +135,7 @@ fn is_keyboard(device: &Device) -> bool {
             keys.contains(Key::KEY_SPACE)
                 && keys.contains(Key::KEY_A)
                 && keys.contains(Key::KEY_Z)
-                && !keys.contains(Key::BTN_TOOL_MOUSE)
+                && !keys.contains(Key::BTN_LEFT) // BTN_MOUSE
         }
         None => false,
     }

src/output.rs

@@ -1,13 +1,45 @@
 use evdev::uinput::{VirtualDevice, VirtualDeviceBuilder};
-use evdev::Device;
+use evdev::{AttributeSet, Key, RelativeAxisType};
 use std::error::Error;
 
-pub fn build_device(base_device: &Device) -> Result<VirtualDevice, Box<dyn Error>> {
-    let builder = VirtualDeviceBuilder::new()?.name("xremap");
-    let device = match base_device.supported_keys() {
-        Some(keys) => builder.with_keys(keys)?,
-        None => builder,
+static MOUSE_BTNS: [&str; 13] = [
+    "BTN_0",
+    "BTN_1",
+    "BTN_2",
+    "BTN_3",
+    "BTN_4",
+    "BTN_5",
+    "BTN_6",
+    "BTN_7",
+    "BTN_8",
+    "BTN_9",
+    "BTN_LEFT",
+    "BTN_MIDDLE",
+    "BTN_RIGHT",
+];
+
+// Credit: https://github.com/mooz/xkeysnail/blob/master/xkeysnail/output.py#L10-L32
+pub fn build_device() -> Result<VirtualDevice, Box<dyn Error>> {
+    let mut keys: AttributeSet<Key> = AttributeSet::new();
+    for code in Key::KEY_RESERVED.code()..Key::BTN_TRIGGER_HAPPY40.code() {
+        let key = Key::new(code);
+        let name = format!("{:?}", key);
+        if name.starts_with("KEY_") || MOUSE_BTNS.contains(&&**&name) {
+            keys.insert(key);
+        }
     }
-    .build()?;
+
+    let mut relative_axes: AttributeSet<RelativeAxisType> = AttributeSet::new();
+    relative_axes.insert(RelativeAxisType::REL_X);
+    relative_axes.insert(RelativeAxisType::REL_Y);
+    relative_axes.insert(RelativeAxisType::REL_HWHEEL);
+    relative_axes.insert(RelativeAxisType::REL_WHEEL);
+    relative_axes.insert(RelativeAxisType::REL_MISC);
+
+    let device = VirtualDeviceBuilder::new()?
+        .name("xremap")
+        .with_keys(&keys)?
+        .with_relative_axes(&relative_axes)?
+        .build()?;
     Ok(device)
 }