glfw: ziggify all Action enums

Make the GLFW action enumerations proper Zig enums so one can use `.Name` syntax, etc.

Helps #37

Signed-off-by: Stephen Gutekanst <stephen@hexops.com>

glfw/src/Joystick.zig

@@ -42,7 +42,7 @@ pub const last = c.GLFW_JOYSTICK_LAST;
 ///
 /// see also: gamepad, glfwGetGamepadState
 const GamepadState = extern struct {
-    /// The states of each gamepad button (see gamepad_buttons), `glfw.press` or `glfw.release`.
+    /// The states of each gamepad button (see gamepad_buttons), `glfw.Action.press` or `glfw.Action.release`.
     buttons: [15]u8,
 
     /// The states of each gamepad axis (see gamepad_axes), in the range -1.0 to 1.0 inclusive.
@@ -100,7 +100,7 @@ pub inline fn getAxes(self: Joystick) Error!?[]const f32 {
 /// Returns the state of all buttons of the specified joystick.
 ///
 /// This function returns the state of all buttons of the specified joystick. Each element in the
-/// array is either `glfw.press` or `glfw.release`.
+/// array is either `glfw.Action.press` or `glfw.Action.release`.
 ///
 /// For backward compatibility with earlier versions that did not have glfw.Joystick.getHats, the
 /// button array also includes all hats, each represented as four buttons. The hats are in the same
@@ -396,7 +396,7 @@ pub inline fn getGamepadName(self: Joystick) Error!?[*c]const u8 {
 /// Steam client.
 ///
 /// Not all devices have all the buttons or axes provided by GamepadState. Unavailable buttons
-/// and axes will always report `glfw.release` and 0.0 respectively.
+/// and axes will always report `glfw.Action.release` and 0.0 respectively.
 ///
 /// @param[in] jid The joystick (see joysticks) to query.
 /// @param[out] state The gamepad input state of the joystick.

glfw/src/Window.zig

@@ -11,6 +11,7 @@ const Image = @import("Image.zig");
 const Monitor = @import("Monitor.zig");
 const Cursor = @import("Cursor.zig");
 const Key = @import("key.zig").Key;
+const Action = @import("action.zig").Action;
 
 const Window = @This();
 
@@ -47,9 +48,9 @@ pub const InternalUserPointer = struct {
     setMaximizeCallback: ?fn (window: Window, maximized: bool) void,
     setFramebufferSizeCallback: ?fn (window: Window, width: isize, height: isize) void,
     setContentScaleCallback: ?fn (window: Window, xscale: f32, yscale: f32) void,
-    setKeyCallback: ?fn (window: Window, key: isize, scancode: isize, action: isize, mods: isize) void,
+    setKeyCallback: ?fn (window: Window, key: isize, scancode: isize, action: Action, mods: isize) void,
     setCharCallback: ?fn (window: Window, codepoint: u21) void,
-    setMouseButtonCallback: ?fn (window: Window, button: isize, action: isize, mods: isize) void,
+    setMouseButtonCallback: ?fn (window: Window, button: isize, action: Action, mods: isize) void,
     setCursorPosCallback: ?fn (window: Window, xpos: f64, ypos: f64) void,
     setCursorEnterCallback: ?fn (window: Window, entered: bool) void,
     setScrollCallback: ?fn (window: Window, xoffset: f64, yoffset: f64) void,
@@ -1347,9 +1348,9 @@ pub inline fn getInputMode(self: Window, mode: isize) isize {
 ///
 /// If the mode is `glfw.sticky_mouse_buttons`, the value must be either `true` to enable sticky
 /// mouse buttons, or `false` to disable it. If sticky mouse buttons are enabled, a mouse button
-/// press will ensure that glfw.Window.getMouseButton returns `glfw.press` the next time it is
+/// press will ensure that glfw.Window.getMouseButton returns `glfw.Action.press` the next time it
-/// called even if the mouse button had been released before the call. This is useful when you are
+/// is called even if the mouse button had been released before the call. This is useful when you
-/// only interested in whether mouse buttons have been pressed but not when or in which order.
+/// are only interested in whether mouse buttons have been pressed but not when or in which order.
 ///
 /// If the mode is `glfw.lock_key_mods`, the value must be either `true` to enable lock key modifier
 /// bits, or `false` to disable them. If enabled, callbacks that receive modifier bits will also
@@ -1383,10 +1384,10 @@ pub inline fn setInputMode(self: Window, mode: isize, value: anytype) Error!void
 ///
 /// This function returns the last press state reported for the specified key to the specified
 /// window. The returned state is one of `true` (pressed) or `false` (released). The higher-level
-/// action `glfw.repeat` is only reported to the key callback.
+/// action `glfw.Action.repeat` is only reported to the key callback.
 ///
-/// If the `glfw.sticky_keys` input mode is enabled, this function returns `glfw.press` the first
+/// If the `glfw.sticky_keys` input mode is enabled, this function returns `glfw.Action.press` the
-/// time you call it for a key that was pressed, even if that key has already been released.
+/// first time you call it for a key that was pressed, even if that key has already been released.
 ///
 /// The key functions deal with physical keys, with key tokens (see keys) named after their use on
 /// the standard US keyboard layout. If you want to input text, use the Unicode character callback
@@ -1399,17 +1400,16 @@ pub inline fn setInputMode(self: Window, mode: isize, value: anytype) Error!void
 /// @param[in] window The desired window.
 /// @param[in] key The desired keyboard key (see keys). `glfw.key.unknown` is not a valid key for
 /// this function.
-/// @return `true` (pressed) or `false` (released)
 ///
 /// Possible errors include glfw.Error.NotInitialized and glfw.Error.InvalidEnum.
 ///
 /// @thread_safety This function must only be called from the main thread.
 ///
 /// see also: input_key
-pub inline fn getKey(self: Window, key: Key) Error!bool {
+pub inline fn getKey(self: Window, key: Key) Error!Action {
     const state = c.glfwGetKey(self.handle, @enumToInt(key));
     try getError();
-    return state == c.GLFW_PRESS;
+    return @intToEnum(Action, state);
 }
 
 /// Returns the last reported state of a mouse button for the specified window.
@@ -1428,10 +1428,10 @@ pub inline fn getKey(self: Window, key: Key) Error!bool {
 /// @thread_safety This function must only be called from the main thread.
 ///
 /// see also: input_mouse_button
-pub inline fn getMouseButton(self: Window, button: isize) Error!bool {
+pub inline fn getMouseButton(self: Window, button: isize) Error!Action {
     const state = c.glfwGetMouseButton(self.handle, @intCast(c_int, button));
     try getError();
-    return state == c.GLFW_PRESS;
+    return @intToEnum(Action, state);
 }
 
 const CursorPos = struct {
@@ -1524,7 +1524,7 @@ pub inline fn setCursor(self: Window, cursor: Cursor) Error!void {
 fn setKeyCallbackWrapper(handle: ?*c.GLFWwindow, key: c_int, scancode: c_int, action: c_int, mods: c_int) callconv(.C) void {
     const window = from(handle.?) catch unreachable;
     const internal = window.getInternal();
-    internal.setKeyCallback.?(window, @intCast(isize, key), @intCast(isize, scancode), @intCast(isize, action), @intCast(isize, mods));
+    internal.setKeyCallback.?(window, @intCast(isize, key), @intCast(isize, scancode), @intToEnum(Action, action), @intCast(isize, mods));
 }
 
 /// Sets the key callback.
@@ -1554,14 +1554,14 @@ fn setKeyCallbackWrapper(handle: ?*c.GLFWwindow, key: c_int, scancode: c_int, ac
 /// @callback_param[in] window The window that received the event.
 /// @callback_param[in] key The keyboard key (see keys) that was pressed or released.
 /// @callback_param[in] scancode The system-specific scancode of the key.
-/// @callback_param[in] action `glfw.press`, `glfw.release` or `glfw.repeat`. Future releases may
+/// @callback_param[in] action `glfw.Action.press`, `glfw.Action.release` or `glfw.Action.repeat`.
-/// add more actions.
+/// Future releases may add more actions.
 /// @callback_param[in] mods Bit field describing which modifier keys (see mods) were held down.
 ///
 /// @thread_safety This function must only be called from the main thread.
 ///
 /// see also: input_key
-pub inline fn setKeyCallback(self: Window, callback: ?fn (window: Window, key: isize, scancode: isize, action: isize, mods: isize) void) void {
+pub inline fn setKeyCallback(self: Window, callback: ?fn (window: Window, key: isize, scancode: isize, action: Action, mods: isize) void) void {
     var internal = self.getInternal();
     internal.setKeyCallback = callback;
     _ = c.glfwSetKeyCallback(self.handle, if (callback != null) setKeyCallbackWrapper else null);
@@ -1616,7 +1616,7 @@ pub inline fn setCharCallback(self: Window, callback: ?fn (window: Window, codep
 fn setMouseButtonCallbackWrapper(handle: ?*c.GLFWwindow, button: c_int, action: c_int, mods: c_int) callconv(.C) void {
     const window = from(handle.?) catch unreachable;
     const internal = window.getInternal();
-    internal.setMouseButtonCallback.?(window, @intCast(isize, button), @intCast(isize, action), @intCast(isize, mods));
+    internal.setMouseButtonCallback.?(window, @intCast(isize, button), @intToEnum(Action, action), @intCast(isize, mods));
 }
 
 /// Sets the mouse button callback.
@@ -1634,14 +1634,14 @@ fn setMouseButtonCallbackWrapper(handle: ?*c.GLFWwindow, button: c_int, action:
 ///
 /// @callback_param[in] window The window that received the event.
 /// @callback_param[in] button The mouse button that was pressed or released.
-/// @callback_param[in] action One of `glfw.press` or `glfw.release`. Future releases may add more
+/// @callback_param[in] action One of `glfw.Action.press` or `glfw.Action.release`. Future releases
-/// actions.
+/// may add more actions.
 /// @callback_param[in] mods Bit field describing which modifier keys (see mods) were held down.
 ///
 /// @thread_safety This function must only be called from the main thread.
 ///
 /// see also: input_mouse_button
-pub inline fn setMouseButtonCallback(self: Window, callback: ?fn (window: Window, button: isize, action: isize, mods: isize) void) void {
+pub inline fn setMouseButtonCallback(self: Window, callback: ?fn (window: Window, button: isize, action: Action, mods: isize) void) void {
     var internal = self.getInternal();
     internal.setMouseButtonCallback = callback;
     _ = c.glfwSetMouseButtonCallback(self.handle, if (callback != null) setMouseButtonCallbackWrapper else null);
@@ -2696,7 +2696,7 @@ test "setKeyCallback" {
     defer window.destroy();
 
     window.setKeyCallback((struct {
-        fn callback(_window: Window, key: isize, scancode: isize, action: isize, mods: isize) void {
+        fn callback(_window: Window, key: isize, scancode: isize, action: Action, mods: isize) void {
             _ = _window;
             _ = key;
             _ = scancode;
@@ -2741,7 +2741,7 @@ test "setMouseButtonCallback" {
     defer window.destroy();
 
     window.setMouseButtonCallback((struct {
-        fn callback(_window: Window, button: isize, action: isize, mods: isize) void {
+        fn callback(_window: Window, button: isize, action: Action, mods: isize) void {
             _ = _window;
             _ = button;
             _ = action;

glfw/src/action.zig

@@ -2,11 +2,14 @@
 
 const c = @import("c.zig").c;
 
-/// The key or mouse button was released.
+/// Holds all GLFW C action enumerations in their raw form.
-pub const release = c.GLFW_RELEASE;
+pub const Action = enum(c_int) {
+    /// The key or mouse button was released.
+    release = c.GLFW_RELEASE,
 
-/// The key or mouse button was pressed.
+    /// The key or mouse button was pressed.
-pub const press = c.GLFW_PRESS;
+    press = c.GLFW_PRESS,
 
-/// The key was held down until it repeated.
+    /// The key was held down until it repeated.
-pub const repeat = c.GLFW_REPEAT;
+    repeat = c.GLFW_REPEAT,
+};

glfw/src/key.zig

@@ -153,7 +153,6 @@ pub const Key = enum(c_int) {
         return @intToEnum(Key, cc.GLFW_KEY_LAST);
     }
 
-    
     /// Returns the layout-specific name of the specified printable key.
     ///
     /// This function returns the name of the specified printable key, encoded as UTF-8. This is
@@ -238,7 +237,6 @@ pub const Key = enum(c_int) {
     }
 };
 
-
 test "getName" {
     const glfw = @import("main.zig");
     try glfw.init();

glfw/src/main.zig

@@ -9,7 +9,7 @@ pub usingnamespace @import("consts.zig");
 pub const Error = @import("errors.zig").Error;
 const getError = @import("errors.zig").getError;
 
-pub const action = @import("action.zig");
+pub const Action = @import("action.zig").Action;
 pub const gamepad_axis = @import("gamepad_axis.zig");
 pub const gamepad_button = @import("gamepad_button.zig");
 pub const GammaRamp = @import("GammaRamp.zig");

glfw/src/mod.zig

@@ -34,7 +34,7 @@ pub const Mods = packed struct {
     }
 };
 
-/// Hold all glfw values as is
+/// Holds all GLFW mod values in their raw form.
 pub const RawMods = struct {
     /// If this bit is set one or more Shift keys were held down.
     pub const shift = c.GLFW_MOD_SHIFT;
@@ -55,7 +55,6 @@ pub const RawMods = struct {
     pub const num_lock = c.GLFW_MOD_NUM_LOCK;
 };
 
-
 test "shift int to bitmask" {
     const std = @import("std");
 
@@ -112,13 +111,12 @@ test "num lock int to bitmask" {
     std.testing.expect(mod.num_lock == true);
 }
 
-
 test "all int to bitmask" {
     const std = @import("std");
 
     const int_mod = RawMods.shift | RawMods.control |
-                    RawMods.alt | RawMods.super | 
+        RawMods.alt | RawMods.super |
-                    RawMods.caps_lock | RawMods.num_lock;
+        RawMods.caps_lock | RawMods.num_lock;
     const mod = Mods.fromInt(int_mod);
 
     std.testing.expect(mod.shift == true);
@@ -161,8 +159,8 @@ test "all bitmask to int" {
     const int_mod = mod.toInt(c_int);
 
     const expected = RawMods.shift | RawMods.control |
-                    RawMods.alt | RawMods.super | 
+        RawMods.alt | RawMods.super |
-                    RawMods.caps_lock | RawMods.num_lock;
+        RawMods.caps_lock | RawMods.num_lock;
 
     std.testing.expectEqual(int_mod, expected);
 }