feat(detect): add active keyboard layout detection on X11

espanso-detect/src/layout/mod.rs

@@ -0,0 +1,40 @@
+/*
+ * This file is part of espanso.
+ *
+ * Copyright (C) 2019-2021 Federico Terzi
+ *
+ * espanso is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * espanso is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with espanso.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#[cfg(target_os = "linux")]
+#[cfg(not(feature = "wayland"))]
+mod x11;
+
+#[cfg(target_os = "linux")]
+#[cfg(not(feature = "wayland"))]
+pub fn get_active_layout() -> Option<String> {
+  x11::get_active_layout()
+}
+
+#[cfg(target_os = "linux")]
+#[cfg(feature = "wayland")]
+pub fn get_active_layout() -> Option<String> {
+  todo!()
+}
+
+#[cfg(not(target_os = "linux"))]
+pub fn get_active_layout() -> Option<String> {
+  // Not available on Windows and macOS yet
+  None
+}

espanso-detect/src/layout/x11.rs

@@ -0,0 +1,43 @@
+/*
+ * This file is part of espanso.
+ *
+ * Copyright (C) 2019-2021 Federico Terzi
+ *
+ * espanso is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * espanso is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with espanso.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+use std::process::Command;
+
+use log::error;
+
+pub fn get_active_layout() -> Option<String> {
+  match Command::new("setxkbmap")
+    .arg("-query")
+    .output()
+  {
+    Ok(output) => {
+      let output_str = String::from_utf8_lossy(&output.stdout);
+      let layout_line = output_str.lines().find(|line| line.contains("layout:"))?;
+      let layout_raw: Vec<&str> = layout_line.split("layout:").collect();
+      Some(layout_raw.get(1)?.trim().to_string()) 
+    },
+    Err(err) => {
+      error!(
+        "unable to retrieve current keyboard layout with 'setxkbmap': {}",
+        err
+      );
+      None
+    }
+  }
+}

espanso-detect/src/lib.rs

@@ -23,6 +23,7 @@ use log::info;
 
 pub mod event;
 pub mod hotkey;
+pub mod layout;
 
 #[cfg(target_os = "windows")]
 pub mod win32;
@@ -113,3 +114,5 @@ pub fn get_source(options: SourceCreationOptions) -> Result<Box<dyn Source>> {
   info!("using EVDEVSource");
   Ok(Box::new(evdev::EVDEVSource::new(options)))
 }
+
+pub use layout::get_active_layout;