mach: flesh out mach.Event (#377)

* Flesh out mach.Event

src/platform/mach.js

@@ -196,27 +196,39 @@ const mach = {
     canvas.addEventListener("contextmenu", (ev) => ev.preventDefault());
 
     canvas.addEventListener("keydown", (ev) => {
+        if (ev.repeat) {
+            mach.events.push(...[2, convertKeyCode(ev.code)]);
+        } else {
             mach.events.push(...[1, convertKeyCode(ev.code)]);
+        }
     });
 
     canvas.addEventListener("keyup", (ev) => {
-      mach.events.push(...[2, convertKeyCode(ev.code)]);
+      mach.events.push(...[3, convertKeyCode(ev.code)]);
     });
 
     canvas.addEventListener("mousemove", (ev) => {
-      mach.events.push(...[3, ev.clientX, ev.clientY]);
+      mach.events.push(...[4, ev.clientX, ev.clientY]);
 	});
 
     canvas.addEventListener("mousedown", (ev) => {
-      mach.events.push(...[4, ev.button]);
-	});
-
-    canvas.addEventListener("mouseup", (ev) => {
       mach.events.push(...[5, ev.button]);
 	});
 
+    canvas.addEventListener("mouseup", (ev) => {
+      mach.events.push(...[6, ev.button]);
+	});
+
     canvas.addEventListener("wheel", (ev) => {
-      mach.events.push(...[6, ev.deltaX, ev.deltaY]);
+      mach.events.push(...[7, ev.deltaX, ev.deltaY]);
+	});
+
+    canvas.addEventListener("focus", (ev) => {
+        mach.events.push(...[8]);
+    });
+
+    canvas.addEventListener("blur", (ev) => {
+        mach.events.push(...[9]);
     });
 
     canvas.addEventListener("mach-canvas-resize", (ev) => {

src/platform/native.zig

@@ -29,6 +29,8 @@ pub const Platform = struct {
 
     native_instance: gpu.NativeInstance,
 
+    last_cursor_position: structs.WindowPos,
+
     const EventQueue = std.TailQueue(structs.Event);
     const EventNode = EventQueue.Node;
 
@@ -180,6 +182,8 @@ pub const Platform = struct {
         engine.current_desc = descriptor;
         engine.target_desc = descriptor;
 
+        const cursor_pos = try window.getCursorPos();
+
         return Platform{
             .window = window,
             .backend_type = backend_type,
@@ -187,6 +191,10 @@ pub const Platform = struct {
             .last_window_size = .{ .width = window_size.width, .height = window_size.height },
             .last_framebuffer_size = .{ .width = framebuffer_size.width, .height = framebuffer_size.height },
             .last_position = try window.getPos(),
+            .last_cursor_position = .{
+                .x = cursor_pos.xpos,
+                .y = cursor_pos.ypos,
+            },
             .native_instance = native_instance,
         };
     }
@@ -210,37 +218,48 @@ pub const Platform = struct {
 
         platform.window.setUserPointer(&platform.user_ptr);
 
-        const callback = struct {
+        const key_callback = struct {
             fn callback(window: glfw.Window, key: glfw.Key, scancode: i32, action: glfw.Action, mods: glfw.Mods) void {
                 const pf = (window.getUserPointer(UserPtr) orelse unreachable).platform;
-
+                const key_event = structs.KeyEvent{
+                    .key = toMachKey(key),
+                    .mods = toMachMods(mods),
+                };
                 switch (action) {
-                    .press => pf.pushEvent(.{
+                    .press => pf.pushEvent(.{ .key_press = key_event }),
-                        .key_press = .{
+                    .repeat => pf.pushEvent(.{ .key_repeat = key_event }),
-                            .key = toMachKey(key),
+                    .release => pf.pushEvent(.{ .key_release = key_event }),
-                        },
-                    }),
-                    .release => pf.pushEvent(.{
-                        .key_release = .{
-                            .key = toMachKey(key),
-                        },
-                    }),
-                    else => {},
                 }
-
                 _ = scancode;
-                _ = mods;
             }
         }.callback;
-        platform.window.setKeyCallback(callback);
+        platform.window.setKeyCallback(key_callback);
+
+        const char_callback = struct {
+            fn callback(window: glfw.Window, codepoint: u21) void {
+                const pf = (window.getUserPointer(UserPtr) orelse unreachable).platform;
+                pf.pushEvent(.{
+                    .char_input = .{
+                        .codepoint = codepoint,
+                    },
+                });
+            }
+        }.callback;
+        platform.window.setCharCallback(char_callback);
 
         const mouse_motion_callback = struct {
             fn callback(window: glfw.Window, xpos: f64, ypos: f64) void {
                 const pf = (window.getUserPointer(UserPtr) orelse unreachable).platform;
-                pf.pushEvent(.{
+                pf.last_cursor_position = .{
-                    .mouse_motion = .{
                     .x = xpos,
                     .y = ypos,
+                };
+                pf.pushEvent(.{
+                    .mouse_motion = .{
+                        .pos = .{
+                            .x = xpos,
+                            .y = ypos,
+                        },
                     },
                 });
             }
@@ -250,17 +269,15 @@ pub const Platform = struct {
         const mouse_button_callback = struct {
             fn callback(window: glfw.Window, button: glfw.mouse_button.MouseButton, action: glfw.Action, mods: glfw.Mods) void {
                 const pf = (window.getUserPointer(UserPtr) orelse unreachable).platform;
-
+                const mouse_button_event = structs.MouseButtonEvent{
+                    .button = toMachButton(button),
+                    .pos = pf.last_cursor_position,
+                    .mods = toMachMods(mods),
+                };
                 switch (action) {
-                    .press => pf.pushEvent(.{
+                    .press => pf.pushEvent(.{ .mouse_press = mouse_button_event }),
-                        .mouse_press = .{
-                            .button = toMachButton(button),
-                        },
-                    }),
                     .release => pf.pushEvent(.{
-                        .mouse_release = .{
+                        .mouse_release = mouse_button_event,
-                            .button = toMachButton(button),
-                        },
                     }),
                     else => {},
                 }
@@ -283,6 +300,22 @@ pub const Platform = struct {
         }.callback;
         platform.window.setScrollCallback(scroll_callback);
 
+        const focus_callback = struct {
+            fn callback(window: glfw.Window, focused: bool) void {
+                const pf = (window.getUserPointer(UserPtr) orelse unreachable).platform;
+                pf.pushEvent(if (focused) .focus_gained else .focus_lost);
+            }
+        }.callback;
+        platform.window.setFocusCallback(focus_callback);
+
+        const close_callback = struct {
+            fn callback(window: glfw.Window) void {
+                const pf = (window.getUserPointer(UserPtr) orelse unreachable).platform;
+                pf.pushEvent(.closed);
+            }
+        }.callback;
+        platform.window.setCloseCallback(close_callback);
+
         const size_callback = struct {
             fn callback(window: glfw.Window, width: i32, height: i32) void {
                 const pf = (window.getUserPointer(UserPtr) orelse unreachable).platform;
@@ -526,6 +559,17 @@ pub const Platform = struct {
         };
     }
 
+    fn toMachMods(mods: glfw.Mods) structs.KeyMods {
+        return .{
+            .shift = mods.shift,
+            .control = mods.control,
+            .alt = mods.alt,
+            .super = mods.super,
+            .caps_lock = mods.caps_lock,
+            .num_lock = mods.num_lock,
+        };
+    }
+
     /// Default GLFW error handling callback
     fn errorCallback(error_code: glfw.Error, description: [:0]const u8) void {
         std.debug.print("glfw: {}: {s}\n", .{ error_code, description });

src/platform/wasm.zig

@@ -38,6 +38,9 @@ pub const Platform = struct {
     last_window_size: structs.Size,
     last_framebuffer_size: structs.Size,
 
+    last_cursor_position: structs.WindowPos,
+    last_key_mods: structs.KeyMods,
+
     pub fn init(allocator: std.mem.Allocator, eng: *Engine) !Platform {
         var selector = [1]u8{0} ** 15;
         const id = js.machCanvasInit(&selector[0]);
@@ -53,6 +56,20 @@ pub const Platform = struct {
                 .width = js.machCanvasGetFramebufferWidth(id),
                 .height = js.machCanvasGetFramebufferHeight(id),
             },
+
+            // TODO initialize these properly
+            .last_cursor_position = .{
+                .x = 0,
+                .y = 0,
+            },
+            .last_key_mods = .{
+                .shift = false,
+                .control = false,
+                .alt = false,
+                .super = false,
+                .caps_lock = false,
+                .num_lock = false,
+            },
         };
 
         try platform.setOptions(eng.options);
@@ -117,38 +134,93 @@ pub const Platform = struct {
         return js.machHasEvent();
     }
 
-    pub fn pollEvent(_: *Platform) ?structs.Event {
+    pub fn pollEvent(platform: *Platform) ?structs.Event {
         const event_type = js.machEventShift();
 
         return switch (event_type) {
+            1, 2 => key_down: {
+                const key = @intToEnum(enums.Key, js.machEventShift());
+                switch (key) {
+                    .left_shift, .right_shift => platform.last_key_mods.shift = true,
+                    .left_control, .right_control => platform.last_key_mods.control = true,
+                    .left_alt, .right_alt => platform.last_key_mods.alt = true,
+                    .left_super, .right_super => platform.last_key_mods.super = true,
+                    .caps_lock => platform.last_key_mods.caps_lock = true,
+                    .num_lock => platform.last_key_mods.num_lock = true,
+                    else => {},
+                }
+                break :key_down switch (event_type) {
                     1 => structs.Event{
-                .key_press = .{ .key = @intToEnum(enums.Key, js.machEventShift()) },
+                        .key_press = .{
+                            .key = key,
+                            .mods = platform.last_key_mods,
+                        },
                     },
                     2 => structs.Event{
-                .key_release = .{ .key = @intToEnum(enums.Key, js.machEventShift()) },
+                        .key_repeat = .{
+                            .key = key,
+                            .mods = platform.last_key_mods,
                         },
-            3 => structs.Event{
+                    },
+                    else => unreachable,
+                };
+            },
+            3 => key_release: {
+                const key = @intToEnum(enums.Key, js.machEventShift());
+                switch (key) {
+                    .left_shift, .right_shift => platform.last_key_mods.shift = false,
+                    .left_control, .right_control => platform.last_key_mods.control = false,
+                    .left_alt, .right_alt => platform.last_key_mods.alt = false,
+                    .left_super, .right_super => platform.last_key_mods.super = false,
+                    .caps_lock => platform.last_key_mods.caps_lock = false,
+                    .num_lock => platform.last_key_mods.num_lock = false,
+                    else => {},
+                }
+                break :key_release structs.Event{
+                    .key_release = .{
+                        .key = key,
+                        .mods = platform.last_key_mods,
+                    },
+                };
+            },
+            4 => mouse_motion: {
+                const x = @intToFloat(f64, js.machEventShift());
+                const y = @intToFloat(f64, js.machEventShift());
+                platform.last_cursor_position = .{
+                    .x = x,
+                    .y = y,
+                };
+                break :mouse_motion structs.Event{
                     .mouse_motion = .{
-                    .x = @intToFloat(f64, js.machEventShift()),
+                        .pos = .{
-                    .y = @intToFloat(f64, js.machEventShift()),
+                            .x = x,
+                            .y = y,
                         },
                     },
-            4 => structs.Event{
+                };
-                .mouse_press = .{
-                    .button = toMachButton(js.machEventShift()),
-                },
             },
             5 => structs.Event{
-                .mouse_release = .{
+                .mouse_press = .{
                     .button = toMachButton(js.machEventShift()),
+                    .pos = platform.last_cursor_position,
+                    .mods = platform.last_key_mods,
                 },
             },
             6 => structs.Event{
+                .mouse_release = .{
+                    .button = toMachButton(js.machEventShift()),
+                    .pos = platform.last_cursor_position,
+                    .mods = platform.last_key_mods,
+                },
+            },
+            7 => structs.Event{
                 .mouse_scroll = .{
                     .xoffset = @floatCast(f32, sign(js.machEventShiftFloat())),
                     .yoffset = @floatCast(f32, sign(js.machEventShiftFloat())),
                 },
             },
+            8 => structs.Event.focus_gained,
+            9 => structs.Event.focus_lost,
             else => null,
         };
     }

src/structs.zig

@@ -48,25 +48,49 @@ pub const Options = struct {
 };
 
 pub const Event = union(enum) {
-    key_press: struct {
+    key_press: KeyEvent,
-        key: enums.Key,
+    key_repeat: KeyEvent,
-    },
+    key_release: KeyEvent,
-    key_release: struct {
+    char_input: struct {
-        key: enums.Key,
+        codepoint: u21,
     },
     mouse_motion: struct {
-        // These are in window coordinates (not framebuffer coords)
+        pos: WindowPos,
-        x: f64,
-        y: f64,
-    },
-    mouse_press: struct {
-        button: enums.MouseButton,
-    },
-    mouse_release: struct {
-        button: enums.MouseButton,
     },
+    mouse_press: MouseButtonEvent,
+    mouse_release: MouseButtonEvent,
     mouse_scroll: struct {
         xoffset: f32,
         yoffset: f32,
     },
+    focus_gained,
+    focus_lost,
+    closed,
+};
+
+pub const KeyEvent = struct {
+    key: enums.Key,
+    mods: KeyMods,
+};
+
+pub const MouseButtonEvent = struct {
+    button: enums.MouseButton,
+    pos: WindowPos,
+    mods: KeyMods,
+};
+
+pub const KeyMods = packed struct {
+    shift: bool,
+    control: bool,
+    alt: bool,
+    super: bool,
+    caps_lock: bool,
+    num_lock: bool,
+    _reserved: u2 = 0,
+};
+
+pub const WindowPos = struct {
+    // These are in window coordinates (not framebuffer coords)
+    x: f64,
+    y: f64,
 };