feat(event): add focus in/out event to SystemEvents

feat(app): add minimal size argument for App.start

Read more corresponding inputs from stdin and convert them correctly
(i.e. in band window resizing), further keys (arrow keys, F-keys, etc.).
Respect the provided minimal size for the application which posts an
error message in case the size is smaller than the requested minimal
size.

examples/container.zig

@@ -82,7 +82,7 @@ pub fn main() !void {
     });
     defer layout.deinit();
 
-    try app.start();
+    try app.start(null);
     defer app.stop() catch unreachable;
 
     // App.Event loop
@@ -104,6 +104,7 @@ pub fn main() !void {
             .err => |err| {
                 log.err("Received {any} with message: {s}", .{ err.err, err.msg });
             },
+            else => {},
         }
         const events = try layout.handle(event);
         for (events.items) |e| {

examples/exec.zig

@@ -68,7 +68,12 @@ pub fn main() !void {
     });
     defer layout.deinit();
 
-    try app.start();
+    const min_size: zterm.Size = .{
+        .cols = 25,
+        .rows = 20,
+    };
+
+    try app.start(min_size);
     defer app.stop() catch unreachable;
 
     // App.Event loop
@@ -88,7 +93,7 @@ pub fn main() !void {
                 }
                 if (Key.matches(key, .{ .cp = 'n', .mod = .{ .ctrl = true } })) {
                     try app.interrupt();
-                    defer app.start() catch @panic("could not start app event loop");
+                    defer app.start(min_size) catch @panic("could not start app event loop");
                     // TODO: parse environment variables to extract the value of $EDITOR and use it here instead
                     var child = std.process.Child.init(&.{"hx"}, allocator);
                     _ = child.spawnAndWait() catch |err| {
@@ -104,6 +109,7 @@ pub fn main() !void {
             .err => |err| {
                 log.err("Received {any} with message: {s}", .{ err.err, err.msg });
             },
+            else => {},
         }
         const events = try layout.handle(event);
         for (events.items) |e| {

examples/padding.zig

@@ -80,7 +80,7 @@ pub fn main() !void {
     });
     defer layout.deinit();
 
-    try app.start();
+    try app.start(null);
     defer app.stop() catch unreachable;
 
     // App.Event loop
@@ -102,6 +102,7 @@ pub fn main() !void {
             .err => |err| {
                 log.err("Received {any} with message: {s}", .{ err.err, err.msg });
             },
+            else => {},
         }
         const events = try layout.handle(event);
         for (events.items) |e| {

examples/stack.zig

@@ -123,7 +123,7 @@ pub fn main() !void {
     });
     defer layout.deinit();
 
-    try app.start();
+    try app.start(null);
     defer app.stop() catch unreachable;
 
     // App.Event loop
@@ -145,6 +145,7 @@ pub fn main() !void {
             .err => |err| {
                 log.err("Received {any} with message: {s}", .{ err.err, err.msg });
             },
+            else => {},
         }
         const events = try layout.handle(event);
         for (events.items) |e| {

examples/tabs.zig

@@ -89,7 +89,7 @@ pub fn main() !void {
     });
     defer layout.deinit();
 
-    try app.start();
+    try app.start(null);
     defer app.stop() catch unreachable;
 
     // App.Event loop
@@ -111,6 +111,7 @@ pub fn main() !void {
             .err => |err| {
                 log.err("Received {any} with message: {s}", .{ err.err, err.msg });
             },
+            else => {},
         }
         const events = try layout.handle(event);
         for (events.items) |e| {

examples/tui.zig

@@ -94,7 +94,7 @@ pub fn main() !void {
     });
     defer layout.deinit();
 
-    try app.start();
+    try app.start(null);
     defer app.stop() catch unreachable;
 
     // App.Event loop
@@ -115,6 +115,7 @@ pub fn main() !void {
             .err => |err| {
                 log.err("Received {any} with message: {s}", .{ err.err, err.msg });
             },
+            else => {},
         }
 
         const events = try layout.handle(event);