Add experimental support for clipboard backend on linux.

native/liblinuxbridge/bridge.cpp

@@ -202,4 +202,12 @@ void delete_string(int32_t count) {
     for (int i = 0; i<count; i++) {
         xdo_send_keysequence_window(xdo_context, CURRENTWINDOW, "BackSpace", 8000);
     }
+}
+
+void trigger_paste() {
+    xdo_send_keysequence_window(xdo_context, CURRENTWINDOW, "Control_L+v", 8000);
+}
+
+void trigger_terminal_paste() {
+    xdo_send_keysequence_window(xdo_context, CURRENTWINDOW, "Control_L+Shift+v", 8000);
 }

native/liblinuxbridge/bridge.h

@@ -42,4 +42,14 @@ extern "C" void send_string(const char * string);
  */
 extern "C" void delete_string(int32_t count);
 
+/*
+ * Trigger normal paste ( Pressing CTRL+V )
+ */
+extern "C" void trigger_paste();
+
+/*
+ * Trigger terminal paste ( Pressing CTRL+SHIFT+V )
+ */
+extern "C" void trigger_terminal_paste();
+
 #endif //ESPANSO_BRIDGE_H

src/clipboard/linux.rs

@@ -0,0 +1,54 @@
+use std::process::{Command, ExitStatus, Stdio};
+use std::io::{Write, Read};
+
+pub struct LinuxClipboardManager {
+
+}
+
+impl super::ClipboardManager for LinuxClipboardManager {
+    fn initialize(&self) {
+        // TODO: check if xclip is present and log an error otherwise.
+    }
+
+    fn get_clipboard(&self) -> Option<String>  {
+        let res = Command::new("xclip")
+            .args(&["-o", "-sel", "clip"])
+            .output();
+
+        if let Ok(output) = res {
+            if output.status.success() {
+                let s = String::from_utf8_lossy(&output.stdout);
+                return Some((*s).to_owned());
+            }
+        }
+
+        None
+    }
+
+    fn set_clipboard(&self, payload: &str) {
+        let mut res = Command::new("xclip")
+            .args(&["-sel", "clip"])
+            .stdin(Stdio::piped())
+            .spawn();
+
+        if let Ok(mut child) = res {
+            let mut stdin = child.stdin.as_mut();
+
+            if let Some(mut output) = stdin {
+                output.write_all(payload.as_bytes());
+
+//                let status = child.wait();
+//
+//                if let Ok(status) = status {
+//                    if !status.success() {
+//                        //TODO: log error
+//                    }
+//                }
+            }
+        }
+    }
+}
+
+impl LinuxClipboardManager {
+
+}

src/clipboard/mod.rs

@@ -0,0 +1,22 @@
+#[cfg(target_os = "windows")]
+mod windows;
+
+#[cfg(target_os = "linux")]
+mod linux;
+
+#[cfg(target_os = "macos")]
+mod macos;
+
+pub trait ClipboardManager {
+    fn initialize(&self);
+    fn get_clipboard(&self) -> Option<String>;
+    fn set_clipboard(&self, payload: &str);
+}
+
+// LINUX IMPLEMENTATION
+#[cfg(target_os = "linux")]
+pub fn get_manager() -> impl ClipboardManager {
+    let manager = linux::LinuxClipboardManager{};
+    manager.initialize();
+    manager
+}

src/engine.rs

@@ -1,19 +1,22 @@
 use crate::matcher::{Match, MatchReceiver};
 use crate::keyboard::KeyboardSender;
 use crate::config::Configs;
+use crate::clipboard::ClipboardManager;
+use std::sync::Arc;
 
-pub struct Engine<S> where S: KeyboardSender {
+pub struct Engine<S, C> where S: KeyboardSender, C: ClipboardManager {
     sender: S,
+    clipboard_manager: Arc<C>,
     configs: Configs,
 }
 
-impl <S> Engine<S> where S: KeyboardSender{
-    pub fn new(sender: S, configs: Configs) -> Engine<S> where S: KeyboardSender {
-        Engine{sender, configs }
+impl <S, C> Engine<S, C> where S: KeyboardSender, C: ClipboardManager{
+    pub fn new(sender: S, clipboard_manager: Arc<C>, configs: Configs) -> Engine<S, C> where S: KeyboardSender, C: ClipboardManager {
+        Engine{sender, clipboard_manager, configs }
     }
 }
 
-impl <S> MatchReceiver for Engine<S> where S: KeyboardSender{
+impl <S, C> MatchReceiver for Engine<S, C> where S: KeyboardSender, C: ClipboardManager{
     fn on_match(&self, m: &Match) {
         self.sender.delete_string(m.trigger.len() as i32);
 
@@ -21,7 +24,9 @@ impl <S> MatchReceiver for Engine<S> where S: KeyboardSender{
         // while on windows and macos, we need to emulate a Enter key press.
 
         if cfg!(target_os = "linux") {
-            self.sender.send_string(m.replace.as_str());
+            self.clipboard_manager.set_clipboard(m.replace.as_str());
+            self.sender.trigger_paste();
+            //self.sender.send_string(m.replace.as_str());
         }else{
             // To handle newlines, substitute each "\n" char with an Enter key press.
             let splits = m.replace.lines();

src/keyboard/linux.rs

@@ -47,6 +47,12 @@ impl super::KeyboardSender for LinuxKeyboardSender {
         // On linux this is not needed, so NOOP
     }
 
+    fn trigger_paste(&self) {
+        unsafe { trigger_paste(); }
+
+        // TODO: detect when in terminal and use trigger_terminal_paste() instead
+    }
+
     fn delete_string(&self, count: i32) {
         unsafe {delete_string(count)}
     }
@@ -94,4 +100,6 @@ extern {
     fn cleanup();
     fn send_string(string: *const c_char);
     fn delete_string(count: i32);
+    fn trigger_paste();
+    fn trigger_terminal_paste();
 }

src/keyboard/mod.rs

@@ -18,6 +18,7 @@ pub trait KeyboardInterceptor {
 pub trait KeyboardSender {
     fn send_string(&self, s: &str);
     fn send_enter(&self);
+    fn trigger_paste(&self);
     fn delete_string(&self, count: i32);
 }
 

src/main.rs

@@ -1,10 +1,11 @@
-use std::sync::mpsc;
+use std::sync::{mpsc, Arc};
 use crate::keyboard::KeyboardInterceptor;
 use crate::matcher::Matcher;
 use crate::matcher::scrolling::ScrollingMatcher;
 use crate::engine::Engine;
 use crate::config::Configs;
 use crate::ui::UIManager;
+use crate::clipboard::ClipboardManager;
 use std::thread;
 use clap::{App, Arg};
 use std::path::Path;
@@ -14,6 +15,7 @@ mod matcher;
 mod engine;
 mod config;
 mod ui;
+mod clipboard;
 
 const VERSION: &'static str = env!("CARGO_PKG_VERSION");
 
@@ -54,11 +56,16 @@ fn espanso_main(configs: Configs) {
     let ui_manager = ui::get_uimanager();
     ui_manager.notify("Hello guys");
 
+    let clipboard_manager = clipboard::get_manager();
+    let clipboard_manager_arc = Arc::new(clipboard_manager);
+
     let (txc, rxc) = mpsc::channel();
 
     let sender = keyboard::get_sender();
 
-    let engine = Engine::new(sender, configs.clone());
+    let engine = Engine::new(sender,
+                             Arc::clone(&clipboard_manager_arc),
+                             configs.clone());
 
     thread::spawn(move || {
         let matcher = ScrollingMatcher::new(configs.clone(), engine);