Remove synthetic keyboard event handling

Fixes #3109.

CHANGELOG.md

@@ -20,6 +20,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Crash when starting on some X11 systems
 - Font size resetting when Alacritty is moved between screens
 - Limited payload length in clipboard escape (used for Tmux copy/paste)
+- Alacritty not ignoring keyboard events for changing WM focus on X11
 
 ## 0.4.1
 

alacritty/src/event.rs

@@ -527,7 +527,7 @@ impl<N: Notify + OnResize> Processor<N> {
                         processor.ctx.display_update_pending.dimensions = Some(size);
                         processor.ctx.terminal.dirty = true;
                     },
-                    KeyboardInput { input, .. } => {
+                    KeyboardInput { input, is_synthetic: false, .. } => {
                         processor.key_input(input);
                         if input.state == ElementState::Pressed {
                             // Hide cursor while typing
@@ -581,7 +581,8 @@ impl<N: Notify + OnResize> Processor<N> {
                             processor.ctx.terminal.dirty = true;
                         }
                     },
-                    TouchpadPressure { .. }
+                    KeyboardInput { is_synthetic: true, .. }
+                    | TouchpadPressure { .. }
                     | ScaleFactorChanged { .. }
                     | CursorEntered { .. }
                     | AxisMotion { .. }
@@ -614,7 +615,8 @@ impl<N: Notify + OnResize> Processor<N> {
             GlutinEvent::WindowEvent { event, .. } => {
                 use glutin::event::WindowEvent::*;
                 match event {
-                    TouchpadPressure { .. }
+                    KeyboardInput { is_synthetic: true, .. }
+                    | TouchpadPressure { .. }
                     | CursorEntered { .. }
                     | AxisMotion { .. }
                     | HoveredFileCancelled