414 lines
14 KiB
Zig
414 lines
14 KiB
Zig
const std = @import("std");
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const mach = @import("../main.zig");
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const Core = @import("../Core.zig");
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const gpu = mach.gpu;
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const InitOptions = Core.InitOptions;
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const Event = Core.Event;
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const KeyEvent = Core.KeyEvent;
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const MouseButtonEvent = Core.MouseButtonEvent;
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const MouseButton = Core.MouseButton;
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const Size = Core.Size;
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const DisplayMode = Core.DisplayMode;
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const CursorShape = Core.CursorShape;
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const VSyncMode = Core.VSyncMode;
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const CursorMode = Core.CursorMode;
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const Position = Core.Position;
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const Key = Core.Key;
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const KeyMods = Core.KeyMods;
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const objc = @import("objc");
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const log = std.log.scoped(.mach);
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pub const Darwin = @This();
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// --------------------------
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// Module state
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// --------------------------
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allocator: std.mem.Allocator,
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core: *Core,
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// Core platform interface
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surface_descriptor: gpu.Surface.Descriptor,
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title: [:0]const u8,
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display_mode: DisplayMode,
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vsync_mode: VSyncMode,
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cursor_mode: CursorMode,
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cursor_shape: CursorShape,
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border: bool,
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headless: bool,
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refresh_rate: u32,
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size: Size,
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// Internals
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window: ?*objc.app_kit.Window,
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pub fn run(comptime on_each_update_fn: anytype, args_tuple: std.meta.ArgsTuple(@TypeOf(on_each_update_fn))) noreturn {
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const Args = @TypeOf(args_tuple);
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const args_bytes = std.mem.asBytes(&args_tuple);
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const ArgsBytes = @TypeOf(args_bytes.*);
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const Helper = struct {
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// TODO: port libdispatch and use it instead of doing this directly.
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extern "System" fn dispatch_async(queue: *anyopaque, block: *objc.foundation.Block(fn () void)) void;
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extern "System" var _dispatch_main_q: anyopaque;
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pub fn cCallback(block: *objc.foundation.BlockLiteral(ArgsBytes)) callconv(.C) void {
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const args: *Args = @ptrCast(&block.context);
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if (@call(.auto, on_each_update_fn, args.*) catch false) {
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dispatch_async(&_dispatch_main_q, block.asBlockWithSignature(fn () void));
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} else {
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// We copied the block when we called `setRunBlock()`, so we release it here when the looping will end.
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block.release();
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}
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}
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};
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var block_literal = objc.foundation.stackBlockLiteral(Helper.cCallback, args_bytes.*, null, null);
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// `NSApplicationMain()` and `UIApplicationMain()` never return, so there's no point in trying to add any kind of cleanup work here.
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const ns_app = objc.app_kit.Application.sharedApplication();
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const delegate = objc.mach.AppDelegate.allocInit();
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delegate.setRunBlock(block_literal.asBlock().copy());
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ns_app.setDelegate(@ptrCast(delegate));
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ns_app.run();
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//_ = objc.app_kit.applicationMain(0, undefined);
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unreachable;
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// TODO: support UIKit.
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}
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pub fn init(
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darwin: *Darwin,
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core: *Core,
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options: InitOptions,
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) !void {
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var surface_descriptor = gpu.Surface.Descriptor{};
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// TODO: support UIKit.
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var window_opt: ?*objc.app_kit.Window = null;
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if (!options.headless) {
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// If the application is not headless, we need to make the application a genuine UI application
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// by setting the activation policy, this moves the process to foreground
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_ = objc.app_kit.Application.sharedApplication().setActivationPolicy(objc.app_kit.ApplicationActivationPolicyRegular);
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const metal_descriptor = try options.allocator.create(gpu.Surface.DescriptorFromMetalLayer);
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const layer = objc.quartz_core.MetalLayer.new();
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defer layer.release();
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layer.setDisplaySyncEnabled(true);
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metal_descriptor.* = .{
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.layer = layer,
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};
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surface_descriptor.next_in_chain = .{ .from_metal_layer = metal_descriptor };
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const screen = objc.app_kit.Screen.mainScreen();
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const rect = objc.core_graphics.Rect{
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.origin = .{ .x = 0, .y = 0 },
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.size = .{ .width = @floatFromInt(options.size.width), .height = @floatFromInt(options.size.height) },
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};
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const window_style =
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(if (options.display_mode == .fullscreen) objc.app_kit.WindowStyleMaskFullScreen else 0) |
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(if (options.display_mode == .windowed) objc.app_kit.WindowStyleMaskTitled else 0) |
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(if (options.display_mode == .windowed) objc.app_kit.WindowStyleMaskClosable else 0) |
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(if (options.display_mode == .windowed) objc.app_kit.WindowStyleMaskMiniaturizable else 0) |
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(if (options.display_mode == .windowed) objc.app_kit.WindowStyleMaskResizable else 0);
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window_opt = objc.app_kit.Window.alloc().initWithContentRect_styleMask_backing_defer_screen(
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rect,
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window_style,
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objc.app_kit.BackingStoreBuffered,
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false,
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screen,
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);
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if (window_opt) |window| {
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window.setReleasedWhenClosed(false);
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var view = objc.mach.View.allocInit();
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view.setLayer(@ptrCast(layer));
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{
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var keyDown = objc.foundation.stackBlockLiteral(ViewCallbacks.keyDown, darwin, null, null);
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view.setBlock_keyDown(keyDown.asBlock().copy());
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var keyUp = objc.foundation.stackBlockLiteral(ViewCallbacks.keyUp, darwin, null, null);
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view.setBlock_keyUp(keyUp.asBlock().copy());
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}
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window.setContentView(@ptrCast(view));
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window.center();
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window.setIsVisible(true);
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window.makeKeyAndOrderFront(null);
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const delegate = objc.mach.WindowDelegate.allocInit();
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defer window.setDelegate(@ptrCast(delegate));
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{ // Set WindowDelegate blocks
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var windowWillResize_toSize = objc.foundation.stackBlockLiteral(WindowDelegateCallbacks.windowWillResize_toSize, darwin, null, null);
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delegate.setBlock_windowWillResize_toSize(windowWillResize_toSize.asBlock().copy());
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var windowShouldClose = objc.foundation.stackBlockLiteral(WindowDelegateCallbacks.windowShouldClose, darwin, null, null);
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delegate.setBlock_windowShouldClose(windowShouldClose.asBlock().copy());
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}
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} else std.debug.panic("mach: window failed to initialize", .{});
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}
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darwin.* = .{
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.allocator = options.allocator,
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.core = core,
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.title = options.title,
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.display_mode = options.display_mode,
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.vsync_mode = .none,
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.cursor_mode = .normal,
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.cursor_shape = .arrow,
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.border = options.border,
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.headless = options.headless,
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.refresh_rate = 60, // TODO: set to something meaningful
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.size = options.size,
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.surface_descriptor = surface_descriptor,
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.window = window_opt,
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};
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}
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pub fn deinit(darwin: *Darwin) void {
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if (darwin.window) |w| @as(*objc.foundation.ObjectProtocol, @ptrCast(w)).release();
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return;
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}
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pub fn update(darwin: *Darwin) !void {
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if (darwin.window) |window| window.update();
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}
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pub fn setTitle(darwin: *Darwin, title: [:0]const u8) void {
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if (darwin.window) |window| {
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var string = objc.app_kit.String.allocInit();
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defer string.release();
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string = string.initWithUTF8String(title.ptr);
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window.setTitle(string);
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}
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}
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pub fn setDisplayMode(_: *Darwin, _: DisplayMode) void {
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return;
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}
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pub fn setBorder(_: *Darwin, _: bool) void {
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return;
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}
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pub fn setHeadless(_: *Darwin, _: bool) void {
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return;
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}
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pub fn setVSync(_: *Darwin, _: VSyncMode) void {
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return;
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}
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pub fn setSize(darwin: *Darwin, size: Size) void {
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if (darwin.window) |window| {
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var frame = window.frame();
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frame.size.height = @floatFromInt(size.height);
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frame.size.width = @floatFromInt(size.width);
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window.setFrame_display_animate(frame, true, true);
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}
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}
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pub fn setCursorMode(_: *Darwin, _: CursorMode) void {
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return;
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}
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pub fn setCursorShape(_: *Darwin, _: CursorShape) void {
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return;
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}
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const WindowDelegateCallbacks = struct {
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pub fn windowWillResize_toSize(block: *objc.foundation.BlockLiteral(*Darwin), size: objc.app_kit.Size) callconv(.C) void {
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const darwin: *Darwin = block.context;
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const s: Size = .{ .width = @intFromFloat(size.width), .height = @intFromFloat(size.height) };
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darwin.size = .{
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.height = s.width,
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.width = s.height,
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};
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darwin.core.swap_chain_update.set();
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darwin.core.pushEvent(.{ .framebuffer_resize = .{ .width = s.width, .height = s.height } });
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}
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pub fn windowShouldClose(block: *objc.foundation.BlockLiteral(*Darwin)) callconv(.C) bool {
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const darwin: *Darwin = block.context;
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darwin.core.pushEvent(.close);
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return false;
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}
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};
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const ViewCallbacks = struct {
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pub fn keyDown(block: *objc.foundation.BlockLiteral(*Darwin), event: *objc.app_kit.Event) callconv(.C) void {
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const darwin: *Darwin = block.context;
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if (event.isARepeat()) {
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darwin.core.pushEvent(.{ .key_repeat = .{
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.key = machKeyFromKeycode(event.keyCode()),
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.mods = machModifierFromModifierFlag(event.modifierFlags()),
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} });
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} else {
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darwin.core.pushEvent(.{ .key_press = .{
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.key = machKeyFromKeycode(event.keyCode()),
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.mods = machModifierFromModifierFlag(event.modifierFlags()),
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} });
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}
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}
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pub fn keyUp(block: *objc.foundation.BlockLiteral(*Darwin), event: *objc.app_kit.Event) callconv(.C) void {
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const darwin: *Darwin = block.context;
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darwin.core.pushEvent(.{ .key_release = .{
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.key = machKeyFromKeycode(event.keyCode()),
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.mods = machModifierFromModifierFlag(event.modifierFlags()),
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} });
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}
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};
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fn machModifierFromModifierFlag(modifier_flag: usize) Core.KeyMods {
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var modifier: Core.KeyMods = .{
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.alt = false,
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.caps_lock = false,
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.control = false,
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.num_lock = false,
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.shift = false,
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.super = false,
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};
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if (modifier_flag & objc.app_kit.EventModifierFlagOption != 0)
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modifier.alt = true;
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if (modifier_flag & objc.app_kit.EventModifierFlagCapsLock != 0)
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modifier.caps_lock = true;
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if (modifier_flag & objc.app_kit.EventModifierFlagControl != 0)
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modifier.control = true;
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if (modifier_flag & objc.app_kit.EventModifierFlagShift != 0)
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modifier.shift = true;
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if (modifier_flag & objc.app_kit.EventModifierFlagCommand != 0)
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modifier.super = true;
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return modifier;
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}
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fn machKeyFromKeycode(keycode: c_ushort) Core.Key {
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comptime var table: [256]Key = undefined;
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comptime for (&table, 1..) |*ptr, i| {
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ptr.* = switch (i) {
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0x35 => .escape,
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0x12 => .one,
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0x13 => .two,
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0x14 => .three,
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0x15 => .four,
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0x17 => .five,
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0x16 => .six,
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0x1A => .seven,
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0x1C => .eight,
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0x19 => .nine,
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0x1D => .zero,
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0x1B => .minus,
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0x18 => .equal,
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0x33 => .backspace,
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0x30 => .tab,
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0x0C => .q,
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0x0D => .w,
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0x0E => .e,
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0x0F => .r,
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0x11 => .t,
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0x10 => .y,
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0x20 => .u,
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0x22 => .i,
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0x1F => .o,
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0x23 => .p,
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0x21 => .left_bracket,
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0x1E => .right_bracket,
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0x24 => .enter,
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0x3B => .left_control,
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0x00 => .a,
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0x01 => .s,
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0x02 => .d,
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0x03 => .f,
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0x05 => .g,
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0x04 => .h,
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0x26 => .j,
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0x28 => .k,
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0x25 => .l,
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0x29 => .semicolon,
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0x27 => .apostrophe,
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0x32 => .grave,
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0x38 => .left_shift,
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//0x2A => .backslash, // Iso backslash instead?
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0x06 => .z,
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0x07 => .x,
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0x08 => .c,
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0x09 => .v,
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0x0B => .b,
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0x2D => .n,
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0x2E => .m,
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0x2B => .comma,
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0x2F => .period,
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0x2C => .slash,
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0x3C => .right_shift,
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0x43 => .kp_multiply,
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0x3A => .left_alt,
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0x31 => .space,
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0x39 => .caps_lock,
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0x7A => .f1,
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0x78 => .f2,
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0x63 => .f3,
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0x76 => .f4,
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0x60 => .f5,
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0x61 => .f6,
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0x62 => .f7,
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0x64 => .f8,
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0x65 => .f9,
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0x6D => .f10,
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0x59 => .kp_7,
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0x5B => .kp_8,
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0x5C => .kp_9,
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0x4E => .kp_subtract,
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0x56 => .kp_4,
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0x57 => .kp_5,
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0x58 => .kp_6,
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0x45 => .kp_add,
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0x53 => .kp_1,
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0x54 => .kp_2,
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0x55 => .kp_3,
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0x52 => .kp_0,
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0x41 => .kp_decimal,
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0x69 => .print,
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0x2A => .iso_backslash,
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0x67 => .f11,
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0x6F => .f12,
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0x51 => .kp_equal,
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//0x64 => .f13, GLFW doesnt have a f13?
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0x6B => .f14,
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0x71 => .f15,
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0x6A => .f16,
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0x40 => .f17,
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0x4F => .f18,
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0x50 => .f19,
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0x5A => .f20,
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0x4C => .kp_enter,
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0x3E => .right_control,
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0x4B => .kp_divide,
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0x3D => .right_alt,
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0x47 => .num_lock,
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0x73 => .home,
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0x7E => .up,
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0x74 => .page_up,
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0x7B => .left,
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0x7C => .right,
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0x77 => .end,
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0x7D => .down,
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0x79 => .page_down,
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0x72 => .insert,
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0x75 => .delete,
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0x37 => .left_super,
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0x36 => .right_super,
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0x6E => .menu,
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else => .unknown,
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};
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};
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return if (keycode > 0 and keycode <= table.len) table[keycode - 1] else if (keycode == 0) .a else .unknown;
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}
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