feat(config): add enable option

espanso-config/src/config/mod.rs

@@ -39,8 +39,21 @@ pub trait Config: Send + Sync {
   fn id(&self) -> i32;
   fn label(&self) -> &str;
   fn match_paths(&self) -> &[String];
+
+  // The mechanism used to perform the injection. Espanso can either
+  // inject text by simulating keypresses (Inject backend) or
+  // by using the clipboard (Clipboard backend). Both of them have pros
+  // and cons, so the "Auto" backend is used by default to automatically
+  // choose the most appropriate one based on the situation.
+  // If for whatever reason the Auto backend is not appropriate, you
+  // can change this option to override it.
   fn backend(&self) -> Backend;
 
+  // If false, espanso will be disabled for the current configuration.
+  // This option can be used to selectively disable espanso when
+  // using a specific application (by creating an app-specific config).
+  fn enable(&self) -> bool;
+
   // Number of chars after which a match is injected with the clipboard
   // backend instead of the default one. This is done for efficiency
   // reasons, as injecting a long match through separate events becomes

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

@@ -28,6 +28,7 @@ pub(crate) struct ParsedConfig {
   pub label: Option<String>,
 
   pub backend: Option<String>,
+  pub enable: Option<bool>,
   pub clipboard_threshold: Option<usize>,
   pub auto_restart: Option<bool>,
   pub preserve_clipboard: Option<bool>,

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

@@ -34,6 +34,9 @@ pub(crate) struct YAMLConfig {
   #[serde(default)]
   pub backend: Option<String>,
 
+  #[serde(default)]
+  pub enable: Option<bool>,
+
   #[serde(default)]
   pub clipboard_threshold: Option<usize>,
 
@@ -150,6 +153,7 @@ impl TryFrom<YAMLConfig> for ParsedConfig {
     Ok(Self {
       label: yaml_config.label,
       backend: yaml_config.backend,
+      enable: yaml_config.enable,
       clipboard_threshold: yaml_config.clipboard_threshold,
       auto_restart: yaml_config.auto_restart,
       toggle_key: yaml_config.toggle_key,
@@ -210,6 +214,7 @@ mod tests {
       r#"
     label: "test"
     backend: clipboard
+    enable: false
     clipboard_threshold: 200
     pre_paste_delay: 300
     toggle_key: CTRL
@@ -268,6 +273,7 @@ mod tests {
         label: Some("test".to_string()),
 
         backend: Some("clipboard".to_string()),
+        enable: Some(false),
         clipboard_threshold: Some(200),
         auto_restart: Some(false),
         preserve_clipboard: Some(false),

espanso-config/src/config/resolve.rs

@@ -159,6 +159,10 @@ impl Config for ResolvedConfig {
     }
   }
   
+  fn enable(&self) -> bool {
+    self.parsed.enable.unwrap_or(true)
+  }
+
   fn clipboard_threshold(&self) -> usize {
     self
       .parsed
@@ -364,6 +368,7 @@ impl ResolvedConfig {
       // Fields
       label,
       backend,
+      enable,
       clipboard_threshold,
       auto_restart,
       pre_paste_delay,

espanso-config/src/legacy/mod.rs

@@ -382,6 +382,10 @@ impl Config for LegacyInteropConfig {
   fn secure_input_notification(&self) -> bool {
     self.config.secure_input_notification
   }
+
+  fn enable(&self) -> bool {
+    self.config.enable_active
+  }
 }
 
 struct LegacyMatchGroup {