cosmic-comp-config crate, and default input config

This adds a `input-default` setting, which is used for input settings if a
device isn't set in `input-devices`. More awkwardly, it also adds an
`input-touchpad` setting, which is used instead of `input-default` for
touchpad devices, so we can separate mouse and touchpad settings even
though they use the same capability and settings.

This no longer sets the input config, and only reads it. If we add a UI
for per-device config, we'll need some IPC mechanism to list connected
devices. (Assuming cosmic-settings can't use libinput directly for that.)

This moves `InputConfig` and `XkbConfig` to a new `cosmic-comp-config`
crate, so they can be used in `cosmic-settings`.

cosmic-comp-config/src/input.rs

@@ -0,0 +1,209 @@
+// SPDX-License-Identifier: GPL-3.0-only
+
+#![allow(non_snake_case)]
+
+use input::{AccelProfile, ClickMethod, ScrollMethod, TapButtonMap};
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Default, Deserialize, Serialize)]
+pub struct InputConfig {
+    pub state: DeviceState,
+    #[serde(skip_serializing_if = "Option::is_none", default)]
+    pub acceleration: Option<AccelConfig>,
+    #[serde(skip_serializing_if = "Option::is_none", default)]
+    pub calibration: Option<[f32; 6]>,
+    #[serde(with = "ClickMethodDef")]
+    #[serde(skip_serializing_if = "Option::is_none", default)]
+    pub click_method: Option<ClickMethod>,
+    #[serde(skip_serializing_if = "Option::is_none", default)]
+    pub disable_while_typing: Option<bool>,
+    #[serde(skip_serializing_if = "Option::is_none", default)]
+    pub left_handed: Option<bool>,
+    #[serde(skip_serializing_if = "Option::is_none", default)]
+    pub middle_button_emulation: Option<bool>,
+    #[serde(skip_serializing_if = "Option::is_none", default)]
+    pub rotation_angle: Option<u32>,
+    #[serde(skip_serializing_if = "Option::is_none", default)]
+    pub scroll_config: Option<ScrollConfig>,
+    #[serde(skip_serializing_if = "Option::is_none", default)]
+    pub tap_config: Option<TapConfig>,
+}
+
+#[derive(Debug, Deserialize, Serialize)]
+pub struct AccelConfig {
+    #[serde(with = "AccelProfileDef")]
+    pub profile: Option<AccelProfile>,
+    pub speed: f64,
+}
+
+#[derive(Debug, Deserialize, Serialize)]
+pub struct ScrollConfig {
+    #[serde(with = "ScrollMethodDef")]
+    pub method: Option<ScrollMethod>,
+    pub natural_scroll: Option<bool>,
+    pub scroll_button: Option<u32>,
+}
+
+#[derive(Copy, Clone, Debug, Serialize, Deserialize)]
+pub enum DeviceState {
+    Enabled,
+    Disabled,
+    DisabledOnExternalMouse,
+}
+
+impl Default for DeviceState {
+    fn default() -> Self {
+        Self::Enabled
+    }
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct TapConfig {
+    pub enabled: bool,
+    #[serde(with = "TapButtonMapDef")]
+    pub button_map: Option<TapButtonMap>,
+    pub drag: bool,
+    pub drag_lock: bool,
+}
+
+mod ClickMethodDef {
+    use input::ClickMethod as ClickMethodOrig;
+    use serde::{Deserialize, Deserializer, Serialize, Serializer};
+
+    #[derive(Debug, Serialize, Deserialize)]
+    pub enum ClickMethod {
+        ButtonAreas,
+        Clickfinger,
+    }
+
+    pub fn deserialize<'de, D>(deserializer: D) -> Result<Option<ClickMethodOrig>, D::Error>
+    where
+        D: Deserializer<'de>,
+    {
+        let o = Option::deserialize(deserializer)?;
+        Ok(o.map(|x| match x {
+            ClickMethod::ButtonAreas => ClickMethodOrig::ButtonAreas,
+            ClickMethod::Clickfinger => ClickMethodOrig::Clickfinger,
+        }))
+    }
+
+    pub fn serialize<S>(arg: &Option<ClickMethodOrig>, ser: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        let arg = match arg {
+            Some(ClickMethodOrig::ButtonAreas) => Some(ClickMethod::ButtonAreas),
+            Some(ClickMethodOrig::Clickfinger) => Some(ClickMethod::Clickfinger),
+            Some(_) | None => None,
+        };
+        Option::serialize(&arg, ser)
+    }
+}
+
+mod AccelProfileDef {
+    use input::AccelProfile as AccelProfileOrig;
+    use serde::{Deserialize, Deserializer, Serialize, Serializer};
+
+    #[derive(Debug, Serialize, Deserialize)]
+    enum AccelProfile {
+        Flat,
+        Adaptive,
+    }
+
+    pub fn deserialize<'de, D>(deserializer: D) -> Result<Option<AccelProfileOrig>, D::Error>
+    where
+        D: Deserializer<'de>,
+    {
+        let o = Option::deserialize(deserializer)?;
+        Ok(o.map(|x| match x {
+            AccelProfile::Flat => AccelProfileOrig::Flat,
+            AccelProfile::Adaptive => AccelProfileOrig::Adaptive,
+        }))
+    }
+
+    pub fn serialize<S>(arg: &Option<AccelProfileOrig>, ser: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        let arg = match arg {
+            Some(AccelProfileOrig::Flat) => Some(AccelProfile::Flat),
+            Some(AccelProfileOrig::Adaptive) => Some(AccelProfile::Adaptive),
+            Some(_) | None => None,
+        };
+        Option::serialize(&arg, ser)
+    }
+}
+
+mod ScrollMethodDef {
+    use input::ScrollMethod as ScrollMethodOrig;
+    use serde::{Deserialize, Deserializer, Serialize, Serializer};
+
+    #[derive(Debug, Serialize, Deserialize)]
+    pub enum ScrollMethod {
+        NoScroll,
+        TwoFinger,
+        Edge,
+        OnButtonDown,
+    }
+
+    pub fn deserialize<'de, D>(deserializer: D) -> Result<Option<ScrollMethodOrig>, D::Error>
+    where
+        D: Deserializer<'de>,
+    {
+        let o = Option::deserialize(deserializer)?;
+        Ok(o.map(|x| match x {
+            ScrollMethod::NoScroll => ScrollMethodOrig::NoScroll,
+            ScrollMethod::TwoFinger => ScrollMethodOrig::TwoFinger,
+            ScrollMethod::Edge => ScrollMethodOrig::Edge,
+            ScrollMethod::OnButtonDown => ScrollMethodOrig::OnButtonDown,
+        }))
+    }
+
+    pub fn serialize<S>(arg: &Option<ScrollMethodOrig>, ser: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        let arg = match arg {
+            Some(ScrollMethodOrig::NoScroll) => Some(ScrollMethod::NoScroll),
+            Some(ScrollMethodOrig::TwoFinger) => Some(ScrollMethod::TwoFinger),
+            Some(ScrollMethodOrig::Edge) => Some(ScrollMethod::Edge),
+            Some(ScrollMethodOrig::OnButtonDown) => Some(ScrollMethod::OnButtonDown),
+            Some(_) | None => None,
+        };
+        Option::serialize(&arg, ser)
+    }
+}
+
+mod TapButtonMapDef {
+    use input::TapButtonMap as TapButtonMapOrig;
+    use serde::{Deserialize, Deserializer, Serialize, Serializer};
+
+    #[derive(Debug, Serialize, Deserialize)]
+    pub enum TapButtonMap {
+        LeftRightMiddle,
+        LeftMiddleRight,
+    }
+
+    pub fn deserialize<'de, D>(deserializer: D) -> Result<Option<TapButtonMapOrig>, D::Error>
+    where
+        D: Deserializer<'de>,
+    {
+        let o = Option::deserialize(deserializer)?;
+        Ok(o.map(|x| match x {
+            TapButtonMap::LeftRightMiddle => TapButtonMapOrig::LeftRightMiddle,
+            TapButtonMap::LeftMiddleRight => TapButtonMapOrig::LeftMiddleRight,
+        }))
+    }
+
+    pub fn serialize<S>(arg: &Option<TapButtonMapOrig>, ser: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        let arg = match arg {
+            Some(TapButtonMapOrig::LeftRightMiddle) => Some(TapButtonMap::LeftRightMiddle),
+            Some(TapButtonMapOrig::LeftMiddleRight) => Some(TapButtonMap::LeftMiddleRight),
+            Some(_) | None => None,
+        };
+        Option::serialize(&arg, ser)
+    }
+}