Add wayland support for testing

Makefile

@@ -53,10 +53,14 @@ package:
 run-client:
 	IMGFLOAT_CHANNELS_URL=http://localhost:8080/channels $(ELECTRON) ./src/main/node/app.js
 
-.PHONY: runx
+.PHONY: run-client-x
 run-client-x:
 	IMGFLOAT_CHANNELS_URL=http://localhost:8080/channels ./src/main/shell/run-electron-app-in-xorg $(ELECTRON)
 
+.PHONY: run-client-wl
+run-client-wl:
+	IMGFLOAT_CHANNELS_URL=http://localhost:8080/channels ./src/main/shell/run-electron-app-in-xorg $(ELECTRON)
+
 .PHONY: fix
 fix: node_modules
 	./node_modules/.bin/prettier --write src

README.md

@@ -79,11 +79,11 @@ This automatically re-compiles the project when source files change. `entr` is r
 
 ### Running the electron client
 
-There are two methods of running the electron app during development. Both methods require access to an Xorg server.
+There are two methods of running the electron app during development.
 
-#### Running in the current X server
+#### Running in the current display server
 
-This spawns the window in your current Xorg server.
+This spawns the window in your current display server.
 
 ```sh
 $ make run-client
@@ -100,3 +100,13 @@ $ make run-client-x
 ...
 ^C
 ```
+
+#### Running in a sandboxed wayland server
+
+This method spawns an Xorg server with `Xephyr` and `openbox` to ensure a floating window manager, which will more accurately reflect the common user environment. Killing either the Xephyr or electron process shuts both down.
+
+```sh
+$ make run-client-x
+...
+^C
+```

shell.nix

@@ -4,12 +4,19 @@ pkgs.mkShell {
   packages = [
     pkgs.electron
     pkgs.jdt-language-server
+    pkgs.libxkbcommon
     pkgs.maven
+    pkgs.mesa
     pkgs.nodePackages.prettier
     pkgs.nodejs
     pkgs.nss
     pkgs.openbox
     pkgs.openjdk
+    pkgs.vulkan-loader
+    pkgs.wayland
+    pkgs.wayland-protocols
+    pkgs.weston
     pkgs.xorg.xorgserver
+    pkgs.xwayland
   ];
 }

src/main/shell/run-electron-app-in-wayland

@@ -0,0 +1,49 @@
+#!/usr/bin/env sh
+set -eu
+
+ELECTRON="$1"
+APP_ENTRY="src/main/node/app.js"
+SIZE="1280x800"
+RUNTIME="${XDG_RUNTIME_DIR:-/tmp}"
+
+# Find free WAYLAND_DISPLAY
+for d in 1 2 3 4 5; do
+    if [ ! -S "$RUNTIME/wayland-$d" ]; then
+        WAYLAND_NUM="$d"
+        break
+    fi
+done
+
+[ -n "${WAYLAND_NUM:-}" ] || {
+    echo "No free WAYLAND_DISPLAY found" >&2
+    exit 1
+}
+
+export WAYLAND_DISPLAY="wayland-$WAYLAND_NUM"
+export XDG_RUNTIME_DIR="$RUNTIME"
+
+cleanup() {
+    kill "$ELECTRON_PID" "$WESTON_PID" 2>/dev/null || true
+}
+trap cleanup EXIT INT TERM
+
+weston \
+  --backend=wayland-backend.so \
+  --width="${SIZE%x*}" \
+  --height="${SIZE#*x}" \
+  --xwayland \
+  --socket="$WAYLAND_DISPLAY" &
+WESTON_PID=$!
+
+sleep 1
+
+WAYLAND_DISPLAY="$WAYLAND_DISPLAY" \
+DISPLAY="" \
+"${ELECTRON}" "$APP_ENTRY" &
+ELECTRON_PID=$!
+
+while :; do
+    kill -0 "$ELECTRON_PID" 2>/dev/null || break
+    kill -0 "$WESTON_PID" 2>/dev/null || break
+    sleep 0.5
+done