Add key/mouse action for spawning new Alacritty instances

CHANGELOG.md

@@ -12,6 +12,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Crashes on Windows are now also reported with a popup in addition to stderr
 - Windows: New configuration field `enable_experimental_conpty_backend` which enables support
     for the Pseudoconsole API (ConPTY) added in Windows 10 October 2018 (1809) update
+- New mouse and key action `SpawnNewInstance` for launching another instance of Alacritty
 
 ### Changed
 

alacritty.yml

@@ -319,7 +319,7 @@ live_config_reload: true
 # arguments (`command`).
 #
 # Example:
-#   `- { key: V, mods: Command, action: Paste }`
+#   `- { key: V, mods: Control|Shift, action: Paste }`
 #
 # Available fields:
 #   - key
@@ -374,6 +374,7 @@ live_config_reload: true
 #   - Hide
 #   - Quit
 #   - ClearLogNotice
+#   - SpawnNewInstance
 #
 # Values for `command`:
 #   The `command` field must be a map containing a `program` string and
@@ -392,8 +393,6 @@ key_bindings:
   - { key: C,        mods: Control|Shift,    action: Copy                }
   - { key: Paste,                   action: Paste                        }
   - { key: Copy,                    action: Copy                         }
-  - { key: Q,        mods: Command, action: Quit                         }
-  - { key: W,        mods: Command, action: Quit                         }
   - { key: Insert,   mods: Shift,   action: PasteSelection               }
   - { key: Key0,     mods: Control, action: ResetFontSize                }
   - { key: Equals,   mods: Control, action: IncreaseFontSize             }

alacritty_macos.yml

@@ -326,7 +326,7 @@ live_config_reload: true
 # arguments (`command`).
 #
 # Example:
-#   `- { key: V, mods: Command, action: Paste }`
+#   `- { key: V, mods: Control|Shift, action: Paste }`
 #
 # Available fields:
 #   - key
@@ -381,6 +381,7 @@ live_config_reload: true
 #   - Hide
 #   - Quit
 #   - ClearLogNotice
+#   - SpawnNewInstance
 #
 # Values for `command`:
 #   The `command` field must be a map containing a `program` string and

alacritty_windows.yml

@@ -303,7 +303,7 @@ enable_experimental_conpty_backend: false
 # arguments (`command`).
 #
 # Example:
-#   `- { key: V, mods: Command, action: Paste }`
+#   `- { key: V, mods: Control|Shift, action: Paste }`
 #
 # Available fields:
 #   - key
@@ -358,6 +358,7 @@ enable_experimental_conpty_backend: false
 #   - Hide
 #   - Quit
 #   - ClearLogNotice
+#   - SpawnNewInstance
 #
 # Values for `command`:
 #   The `command` field must be a map containing a `program` string and
@@ -374,8 +375,6 @@ enable_experimental_conpty_backend: false
 key_bindings:
   - { key: V,        mods: Control|Shift,    action: Paste               }
   - { key: C,        mods: Control|Shift,    action: Copy                }
-  - { key: Q,        mods: Command, action: Quit                         }
-  - { key: W,        mods: Command, action: Quit                         }
   - { key: Insert,   mods: Shift,   action: PasteSelection               }
   - { key: Key0,     mods: Control, action: ResetFontSize                }
   - { key: Equals,   mods: Control, action: IncreaseFontSize             }

src/config.rs

@@ -771,7 +771,7 @@ impl<'a> de::Deserialize<'a> for ActionWrapper {
             fn expecting(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
                 f.write_str("Paste, Copy, PasteSelection, IncreaseFontSize, DecreaseFontSize, \
                             ResetFontSize, ScrollPageUp, ScrollPageDown, ScrollToTop, \
-                            ScrollToBottom, ClearHistory, Hide, ClearLogNotice or Quit")
+                            ScrollToBottom, ClearHistory, Hide, ClearLogNotice, SpawnNewInstance or Quit")
             }
 
             fn visit_str<E>(self, value: &str) -> ::std::result::Result<ActionWrapper, E>
@@ -792,6 +792,7 @@ impl<'a> de::Deserialize<'a> for ActionWrapper {
                     "Hide" => Action::Hide,
                     "Quit" => Action::Quit,
                     "ClearLogNotice" => Action::ClearLogNotice,
+                    "SpawnNewInstance" => Action::SpawnNewInstance,
                     _ => return Err(E::invalid_value(Unexpected::Str(value), &self)),
                 }))
             }

src/event.rs

@@ -1,15 +1,21 @@
 //! Process window events
+#[cfg(unix)]
+use std::fs;
 use std::borrow::Cow;
 use std::fs::File;
 use std::io::Write;
 use std::sync::mpsc;
 use std::time::{Instant};
+use std::env;
 
 use serde_json as json;
 use parking_lot::MutexGuard;
 use glutin::{self, ModifiersState, Event, ElementState};
 use copypasta::{Clipboard, Load, Store, Buffer as ClipboardBuffer};
+use glutin::dpi::PhysicalSize;
 
+#[cfg(unix)]
+use crate::tty;
 use crate::ansi::{Handler, ClearMode};
 use crate::grid::Scroll;
 use crate::config::{self, Config};
@@ -21,10 +27,9 @@ use crate::selection::Selection;
 use crate::sync::FairMutex;
 use crate::term::{Term, SizeInfo, TermMode, Search};
 use crate::term::cell::Cell;
-use crate::util::limit;
+use crate::util::{limit, start_daemon};
 use crate::util::fmt::Red;
 use crate::window::Window;
-use glutin::dpi::PhysicalSize;
 
 /// Byte sequences are sent to a `Notify` in response to some events
 pub trait Notify {
@@ -177,6 +182,23 @@ impl<'a, N: Notify + 'a> input::ActionContext for ActionContext<'a, N> {
     fn clear_log(&mut self) {
         self.terminal.clear_log();
     }
+
+    fn spawn_new_instance(&mut self) {
+        let alacritty = env::args().next().unwrap();
+        #[cfg(unix)]
+        let args = [
+            "--working-directory".into(),
+            fs::read_link(format!("/proc/{}/cwd", unsafe { tty::PID }))
+                .expect("shell working directory"),
+        ];
+        #[cfg(not(unix))]
+        let args: [&str; 0] = [];
+
+        match start_daemon(&alacritty, &args) {
+            Ok(_) => debug!("Started new Alacritty process: {} {:?}", alacritty, args),
+            Err(_) => warn!("Unable to start new Alacritty process: {} {:?}", alacritty, args),
+        }
+    }
 }
 
 /// The ActionContext can't really have direct access to the Window

src/input.rs

@@ -75,6 +75,7 @@ pub trait ActionContext {
     fn hide_window(&mut self);
     fn url(&self, _: Point<usize>) -> Option<String>;
     fn clear_log(&mut self);
+    fn spawn_new_instance(&mut self);
 }
 
 /// Describes a state and action to take in that state
@@ -202,6 +203,9 @@ pub enum Action {
 
     /// Clears warning and error notices.
     ClearLogNotice,
+
+    /// Spawn a new instance of Alacritty.
+    SpawnNewInstance,
 }
 
 impl Action {
@@ -279,7 +283,10 @@ impl Action {
             },
             Action::ClearLogNotice => {
                 ctx.clear_log();
-            }
+            },
+            Action::SpawnNewInstance => {
+                ctx.spawn_new_instance();
+            },
         }
     }
 
@@ -793,9 +800,17 @@ mod tests {
     }
 
     impl <'a>super::ActionContext for ActionContext<'a> {
-        fn write_to_pty<B: Into<Cow<'static, [u8]>>>(&mut self, _val: B) {
-            // STUBBED
-        }
+        fn write_to_pty<B: Into<Cow<'static, [u8]>>>(&mut self, _val: B) {}
+        fn update_selection(&mut self, _point: Point, _side: Side) {}
+        fn simple_selection(&mut self, _point: Point, _side: Side) {}
+        fn copy_selection(&self, _buffer: ClipboardBuffer) {}
+        fn clear_selection(&mut self) {}
+        fn change_font_size(&mut self, _delta: f32) {}
+        fn reset_font_size(&mut self) {}
+        fn clear_history(&mut self) {}
+        fn clear_log(&mut self) {}
+        fn hide_window(&mut self) {}
+        fn spawn_new_instance(&mut self) {}
 
         fn terminal_mode(&self) -> TermMode {
             *self.terminal.mode()
@@ -805,14 +820,6 @@ mod tests {
             *self.size_info
         }
 
-        fn copy_selection(&self, _buffer: ClipboardBuffer) {
-            // STUBBED
-        }
-
-        fn clear_selection(&mut self) {}
-        fn update_selection(&mut self, _point: Point, _side: Side) {}
-        fn simple_selection(&mut self, _point: Point, _side: Side) {}
-
         fn semantic_selection(&mut self, _point: Point) {
             // set something that we can check for here
             self.last_action = MultiClick::DoubleClick;
@@ -851,21 +858,14 @@ mod tests {
         fn received_count(&mut self) -> &mut usize {
             &mut self.received_count
         }
+
         fn suppress_chars(&mut self) -> &mut bool {
             &mut self.suppress_chars
         }
+
         fn last_modifiers(&mut self) -> &mut ModifiersState {
             &mut self.last_modifiers
         }
-        fn change_font_size(&mut self, _delta: f32) {
-        }
-        fn reset_font_size(&mut self) {
-        }
-        fn clear_history(&mut self) {
-        }
-        fn hide_window(&mut self) {
-        }
-        fn clear_log(&mut self) {}
     }
 
     macro_rules! test_clickstate {

src/tty/unix.rs

@@ -38,7 +38,7 @@ use std::os::unix::io::AsRawFd;
 /// Process ID of child process
 ///
 /// Necessary to put this in static storage for `sigchld` to have access
-static mut PID: pid_t = 0;
+pub static mut PID: pid_t = 0;
 
 /// Exit flag
 ///

src/util.rs

@@ -14,6 +14,7 @@
 #[cfg(not(windows))]
 use std::os::unix::process::CommandExt;
 use std::process::Command;
+use std::ffi::OsStr;
 use std::{cmp, io};
 
 /// Threading utilities
@@ -77,7 +78,11 @@ pub mod fmt {
 }
 
 #[cfg(not(windows))]
-pub fn start_daemon(program: &str, args: &[String]) -> io::Result<()> {
+pub fn start_daemon<I, S>(program: &str, args: I) -> io::Result<()>
+    where
+        I: IntoIterator<Item = S>,
+        S: AsRef<OsStr>,
+{
     Command::new(program)
         .args(args)
         .before_exec(|| unsafe {
@@ -90,7 +95,11 @@ pub fn start_daemon(program: &str, args: &[String]) -> io::Result<()> {
 }
 
 #[cfg(windows)]
-pub fn start_daemon(program: &str, args: &[String]) -> io::Result<()> {
+pub fn start_daemon<I, S>(program: &str, args: I) -> io::Result<()>
+    where
+        I: IntoIterator<Item = S>,
+        S: AsRef<OsStr>,
+{
     Command::new(program).args(args).spawn().map(|_| ())
 }