feat(config): create config option for alternative x11 xclip backend

espanso-config/src/config/mod.rs

@@ -150,6 +150,10 @@ pub trait Config: Send + Sync {
   // If false, avoid showing the SecureInput notification on macOS
   fn secure_input_notification(&self) -> bool;
 
+  // If true, use the `xclip` command to implement the clipboard instead of
+  // the built-in native module on X11.
+  fn x11_use_xclip_backend(&self) -> bool;
+
   // If true, filter out keyboard events without an explicit HID device source on Windows.
   // This is needed to filter out the software-generated events, including
   // those from espanso, but might need to be disabled when using some software-level keyboards.
@@ -193,6 +197,7 @@ pub trait Config: Send + Sync {
         show_notifications: {:?}
         secure_input_notification: {:?}
 
+        x11_use_xclip_backend: {:?}
         win32_exclude_orphan_events: {:?}
         win32_keyboard_layout_cache_interval: {:?}
 
@@ -224,6 +229,7 @@ pub trait Config: Send + Sync {
       self.show_notifications(),
       self.secure_input_notification(),
 
+      self.x11_use_xclip_backend(),
       self.win32_exclude_orphan_events(),
       self.win32_keyboard_layout_cache_interval(),
 

espanso-config/src/config/parse/mod.rs

@@ -46,6 +46,7 @@ pub(crate) struct ParsedConfig {
   pub secure_input_notification: Option<bool>,
   pub win32_exclude_orphan_events: Option<bool>,
   pub win32_keyboard_layout_cache_interval: Option<i64>,
+  pub x11_use_xclip_backend: Option<bool>,
 
   pub pre_paste_delay: Option<usize>,
   pub restore_clipboard_delay: Option<usize>,

espanso-config/src/config/parse/yaml.rs

@@ -112,6 +112,9 @@ pub(crate) struct YAMLConfig {
   #[serde(default)]
   pub win32_keyboard_layout_cache_interval: Option<i64>,
 
+  #[serde(default)]
+  pub x11_use_xclip_backend: Option<bool>,
+
   // Include/Exclude
   #[serde(default)]
   pub includes: Option<Vec<String>>,
@@ -201,6 +204,7 @@ impl TryFrom<YAMLConfig> for ParsedConfig {
 
       win32_exclude_orphan_events: yaml_config.win32_exclude_orphan_events,
       win32_keyboard_layout_cache_interval: yaml_config.win32_keyboard_layout_cache_interval,
+      x11_use_xclip_backend: yaml_config.x11_use_xclip_backend,
 
       use_standard_includes: yaml_config.use_standard_includes,
       includes: yaml_config.includes,
@@ -258,6 +262,7 @@ mod tests {
     secure_input_notification: false
     win32_exclude_orphan_events: false
     win32_keyboard_layout_cache_interval: 300
+    x11_use_xclip_backend: true
       
     use_standard_includes: true
     includes: ["test1"]
@@ -311,6 +316,7 @@ mod tests {
         secure_input_notification: Some(false),
         win32_exclude_orphan_events: Some(false),
         win32_keyboard_layout_cache_interval: Some(300),
+        x11_use_xclip_backend: Some(true),
 
         pre_paste_delay: Some(300),
         evdev_modifier_delay: Some(40),

espanso-config/src/config/resolve.rs

@@ -330,6 +330,10 @@ impl Config for ResolvedConfig {
       .win32_keyboard_layout_cache_interval
       .unwrap_or(2000)
   }
+
+  fn x11_use_xclip_backend(&self) -> bool {
+    self.parsed.x11_use_xclip_backend.unwrap_or(false)
+  }
 }
 
 impl ResolvedConfig {
@@ -413,6 +417,7 @@ impl ResolvedConfig {
       secure_input_notification,
       win32_exclude_orphan_events,
       win32_keyboard_layout_cache_interval,
+      x11_use_xclip_backend,
       includes,
       excludes,
       extra_includes,

espanso-config/src/legacy/mod.rs

@@ -398,6 +398,10 @@ impl Config for LegacyInteropConfig {
   fn win32_keyboard_layout_cache_interval(&self) -> i64 {
     2000
   }
+
+  fn x11_use_xclip_backend(&self) -> bool {
+    false
+  }
 }
 
 struct LegacyMatchGroup {