refactor stub

src/nu/Bus.zig

@@ -0,0 +1,294 @@
+const std = @import("std");
+// const vk = @import("vk");
+// const c = @import("../c.zig");
+// const Window = @import("../au.zig").Window;
+const Self = @This();
+
+const Window = @import("Window.zig");
+const c = Window.c;
+
+alloc: std.mem.Allocator,
+events: std.ArrayListUnmanaged(Event) = .{}, // todo bounded array?
+drops: std.ArrayListUnmanaged([][]const u8) = .{}, // todo bounded array?
+
+pub fn init(alloc: std.mem.Allocator) Self {
+    return .{
+        .alloc = alloc,
+    };
+}
+
+pub fn deinit(self: *Self) void {
+    self.clear();
+
+    self.events.deinit(self.alloc);
+    self.drops.deinit(self.alloc);
+}
+
+pub fn connect(self: *Self, handle: *c.GLFWwindow) void {
+    // todo somehow prevent double-connect?
+    c.glfwSetWindowUserPointer(handle, self);
+    _ = c.glfwSetWindowPosCallback(handle, onWindowPos);
+    _ = c.glfwSetWindowSizeCallback(handle, onWindowSize);
+    _ = c.glfwSetWindowCloseCallback(handle, onWindowClose);
+    _ = c.glfwSetWindowRefreshCallback(handle, onWindowRefresh);
+    _ = c.glfwSetWindowFocusCallback(handle, onWindowFocus);
+    _ = c.glfwSetWindowIconifyCallback(handle, onWindowIconify);
+    _ = c.glfwSetWindowMaximizeCallback(handle, onWindowMaximize);
+    _ = c.glfwSetFramebufferSizeCallback(handle, onFramebufferSize);
+    _ = c.glfwSetWindowContentScaleCallback(handle, onWindowContentScale);
+    _ = c.glfwSetMouseButtonCallback(handle, onMouseButton);
+    _ = c.glfwSetCursorPosCallback(handle, onCursorPos);
+    _ = c.glfwSetCursorEnterCallback(handle, onCursorEnter);
+    _ = c.glfwSetScrollCallback(handle, onScroll);
+    _ = c.glfwSetKeyCallback(handle, onKey);
+    _ = c.glfwSetCharModsCallback(handle, onCharMods);
+    _ = c.glfwSetDropCallback(handle, onDrop);
+}
+
+pub fn disconnect(_: *Self, handle: *c.GLFWwindow) void {
+    // todo somehow prevent double-disconnect?
+    c.glfwSetWindowUserPointer(handle, null);
+    _ = c.glfwSetWindowPosCallback(handle, null);
+    _ = c.glfwSetWindowSizeCallback(handle, null);
+    _ = c.glfwSetWindowCloseCallback(handle, null);
+    _ = c.glfwSetWindowRefreshCallback(handle, null);
+    _ = c.glfwSetWindowFocusCallback(handle, null);
+    _ = c.glfwSetWindowIconifyCallback(handle, null);
+    _ = c.glfwSetWindowMaximizeCallback(handle, null);
+    _ = c.glfwSetFramebufferSizeCallback(handle, null);
+    _ = c.glfwSetWindowContentScaleCallback(handle, null);
+    _ = c.glfwSetMouseButtonCallback(handle, null);
+    _ = c.glfwSetCursorPosCallback(handle, null);
+    _ = c.glfwSetCursorEnterCallback(handle, null);
+    _ = c.glfwSetScrollCallback(handle, null);
+    _ = c.glfwSetKeyCallback(handle, null);
+    _ = c.glfwSetCharModsCallback(handle, null);
+    _ = c.glfwSetDropCallback(handle, null);
+}
+
+pub fn clear(self: *Self) void {
+    for (self.drops.items) |drop| {
+        for (drop) |path| {
+            self.alloc.free(path);
+        }
+        self.alloc.free(drop);
+    }
+    self.drops.clearAndFree(self.alloc);
+
+    self.events.clearRetainingCapacity();
+}
+
+fn getBus(handle: ?*c.GLFWwindow) *Self {
+    return @alignCast(@ptrCast(c.glfwGetWindowUserPointer(handle)));
+}
+
+pub const Event = union(enum) {
+    const WindowPos = struct { x: i32, y: i32 };
+    const WindowSize = struct { x: i32, y: i32 };
+    const WindowClose = struct {};
+    const WindowRefresh = struct {};
+    const WindowFocus = struct { focused: bool };
+    const WindowIconify = struct { iconified: bool };
+    const WindowMaximize = struct { maximized: bool };
+    const FramebufferSize = struct { width: u32, height: u32 };
+    const WindowContentScale = struct { x: f32, y: f32 };
+    const MouseButton = struct {
+        button: c_int, // todo enum
+        action: c_int, // todo enum
+        mods: c_int, // todo bitmask
+    };
+    const CursorPos = struct { x: f64, y: f64 };
+    const CursorEnter = struct { entered: bool };
+    const Scroll = struct { dx: f64, dy: f64 };
+    const Key = struct {
+        key: c_int, // todo enum
+        scan: c_int, // todo ???
+        action: c_int, // todo enum
+        mods: c_int, // todo bitmask
+    };
+    const Char = struct {
+        code: u21,
+    };
+    const CharMods = struct {
+        code: u21,
+        mods: c_int, // todo bitmask
+    };
+    const Drop = struct {
+        paths: []const []const u8,
+    };
+
+    windowPos: WindowPos,
+    windowSize: WindowSize,
+    windowClose: WindowClose,
+    windowRefresh: WindowRefresh,
+    windowFocus: WindowFocus,
+    windowIconify: WindowIconify,
+    windowMaximize: WindowMaximize,
+    framebufferSize: FramebufferSize,
+    windowContentScale: WindowContentScale,
+    mouseButton: MouseButton,
+    cursorPos: CursorPos,
+    cursorEnter: CursorEnter,
+    scroll: Scroll,
+    key: Key,
+    char: Char,
+    charMods: CharMods,
+    drop: Drop,
+};
+
+fn onWindowPos(handle: ?*c.GLFWwindow, x: c_int, y: c_int) callconv(.C) void {
+    const bus = getBus(handle);
+    bus.events.append(bus.alloc, .{
+        .windowPos = .{
+            .x = @intCast(x),
+            .y = @intCast(y),
+        },
+    }) catch unreachable; // todo circular queue; warn
+}
+
+fn onWindowSize(handle: ?*c.GLFWwindow, x: c_int, y: c_int) callconv(.C) void {
+    const bus = getBus(handle);
+    bus.events.append(bus.alloc, .{
+        .windowSize = .{
+            .x = @intCast(x),
+            .y = @intCast(y),
+        },
+    }) catch unreachable; // todo circular queue; warn
+}
+
+fn onWindowClose(handle: ?*c.GLFWwindow) callconv(.C) void {
+    const bus = getBus(handle);
+    bus.events.append(bus.alloc, .{
+        .windowClose = .{},
+    }) catch unreachable; // todo circular queue; warn
+}
+
+fn onWindowRefresh(handle: ?*c.GLFWwindow) callconv(.C) void {
+    const bus = getBus(handle);
+    bus.events.append(bus.alloc, .{
+        .windowRefresh = .{},
+    }) catch unreachable; // todo circular queue; warn
+}
+
+fn onWindowFocus(handle: ?*c.GLFWwindow, focused: c_int) callconv(.C) void {
+    const bus = getBus(handle);
+    bus.events.append(bus.alloc, .{
+        .windowFocus = .{
+            .focused = focused == c.GLFW_TRUE,
+        },
+    }) catch unreachable; // todo circular queue; warn
+}
+
+fn onWindowIconify(handle: ?*c.GLFWwindow, iconified: c_int) callconv(.C) void {
+    const bus = getBus(handle);
+    bus.events.append(bus.alloc, .{
+        .windowIconify = .{
+            .iconified = iconified == c.GLFW_TRUE,
+        },
+    }) catch unreachable; // todo circular queue; warn
+}
+
+fn onWindowMaximize(handle: ?*c.GLFWwindow, maximized: c_int) callconv(.C) void {
+    const bus = getBus(handle);
+    bus.events.append(bus.alloc, .{
+        .windowMaximize = .{
+            .maximized = maximized == c.GLFW_TRUE,
+        },
+    }) catch unreachable; // todo circular queue; warn
+}
+
+fn onFramebufferSize(handle: ?*c.GLFWwindow, width: c_int, height: c_int) callconv(.C) void {
+    const bus = getBus(handle);
+    bus.events.append(bus.alloc, .{
+        .framebufferSize = .{
+            .width = @intCast(width),
+            .height = @intCast(height),
+        },
+    }) catch unreachable; // todo circular queue; warn
+}
+
+fn onWindowContentScale(handle: ?*c.GLFWwindow, x: f32, y: f32) callconv(.C) void {
+    const bus = getBus(handle);
+    bus.events.append(bus.alloc, .{
+        .windowContentScale = .{
+            .x = x,
+            .y = y,
+        },
+    }) catch unreachable; // todo circular queue; warn
+}
+
+fn onMouseButton(handle: ?*c.GLFWwindow, button: c_int, action: c_int, mods: c_int) callconv(.C) void {
+    const bus = getBus(handle);
+    bus.events.append(bus.alloc, .{
+        .mouseButton = .{
+            .button = button,
+            .action = action,
+            .mods = mods,
+        },
+    }) catch unreachable; // todo circular queue; warn
+}
+
+fn onCursorPos(handle: ?*c.GLFWwindow, x: f64, y: f64) callconv(.C) void {
+    const bus = getBus(handle);
+    bus.events.append(bus.alloc, .{
+        .cursorPos = .{
+            .x = x,
+            .y = y,
+        },
+    }) catch unreachable; // todo circular queue; warn
+}
+
+fn onCursorEnter(handle: ?*c.GLFWwindow, entered: c_int) callconv(.C) void {
+    const bus = getBus(handle);
+    bus.events.append(bus.alloc, .{
+        .cursorEnter = .{
+            .entered = entered == c.GLFW_TRUE,
+        },
+    }) catch unreachable; // todo circular queue; warn
+}
+
+fn onScroll(handle: ?*c.GLFWwindow, dx: f64, dy: f64) callconv(.C) void {
+    const bus = getBus(handle);
+    bus.events.append(bus.alloc, .{
+        .scroll = .{
+            .dx = dx,
+            .dy = dy,
+        },
+    }) catch unreachable; // todo circular queue; warn
+}
+
+fn onKey(handle: ?*c.GLFWwindow, key: c_int, scan: c_int, action: c_int, mods: c_int) callconv(.C) void {
+    const bus = getBus(handle);
+    bus.events.append(bus.alloc, .{
+        .key = .{
+            .key = key,
+            .scan = scan,
+            .action = action,
+            .mods = mods,
+        },
+    }) catch unreachable; // todo circular queue; warn
+}
+
+fn onCharMods(handle: ?*c.GLFWwindow, code: c_uint, mods: c_int) callconv(.C) void {
+    const bus = getBus(handle);
+    bus.events.append(bus.alloc, .{
+        .charMods = .{
+            .code = @intCast(code),
+            .mods = mods,
+        },
+    }) catch unreachable; // todo circular queue; warn
+}
+
+fn onDrop(handle: ?*c.GLFWwindow, count: c_int, paths: [*c][*c]const u8) callconv(.C) void {
+    const bus = getBus(handle);
+
+    const drops = bus.alloc.alloc([]const u8, @intCast(count)) catch unreachable; // todo warn
+    for (drops, paths) |*dst, src| {
+        dst.* = bus.alloc.dupe(u8, std.mem.sliceTo(src, 0)) catch unreachable; // todo warn
+    }
+    bus.drops.append(bus.alloc, drops) catch unreachable; // todo warn
+
+    bus.events.append(bus.alloc, .{
+        .drop = .{ .paths = drops },
+    }) catch unreachable; // todo circular queue; warn
+}