Decouple iced from coffee

src/input/button_state.rs

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+#[derive(Debug, Hash, Ord, PartialOrd, PartialEq, Eq, Clone, Copy)]
+pub enum ButtonState {
+    Pressed,
+    Released,
+}

src/input/keyboard.rs

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+mod event;
+mod key_code;
+
+pub use event::Event;
+pub use key_code::KeyCode;

src/input/keyboard/event.rs

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+use super::KeyCode;
+use crate::input::ButtonState;
+
+#[derive(Debug, Clone, Copy, PartialEq)]
+/// A keyboard event.
+pub enum Event {
+    /// A keyboard key was pressed or released.
+    Input {
+        /// The state of the key
+        state: ButtonState,
+
+        /// The key identifier
+        key_code: KeyCode,
+    },
+
+    /// Text was entered.
+    TextEntered {
+        /// The character entered
+        character: char,
+    },
+}

src/input/keyboard/key_code.rs

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+/// The symbolic name of a keyboard key
+#[derive(Debug, Hash, Ord, PartialOrd, PartialEq, Eq, Clone, Copy)]
+#[repr(u32)]
+pub enum KeyCode {
+    /// The '1' key over the letters.
+    Key1,
+    /// The '2' key over the letters.
+    Key2,
+    /// The '3' key over the letters.
+    Key3,
+    /// The '4' key over the letters.
+    Key4,
+    /// The '5' key over the letters.
+    Key5,
+    /// The '6' key over the letters.
+    Key6,
+    /// The '7' key over the letters.
+    Key7,
+    /// The '8' key over the letters.
+    Key8,
+    /// The '9' key over the letters.
+    Key9,
+    /// The '0' key over the 'O' and 'P' keys.
+    Key0,
+
+    A,
+    B,
+    C,
+    D,
+    E,
+    F,
+    G,
+    H,
+    I,
+    J,
+    K,
+    L,
+    M,
+    N,
+    O,
+    P,
+    Q,
+    R,
+    S,
+    T,
+    U,
+    V,
+    W,
+    X,
+    Y,
+    Z,
+
+    /// The Escape key, next to F1.
+    Escape,
+
+    F1,
+    F2,
+    F3,
+    F4,
+    F5,
+    F6,
+    F7,
+    F8,
+    F9,
+    F10,
+    F11,
+    F12,
+    F13,
+    F14,
+    F15,
+    F16,
+    F17,
+    F18,
+    F19,
+    F20,
+    F21,
+    F22,
+    F23,
+    F24,
+
+    /// Print Screen/SysRq.
+    Snapshot,
+    /// Scroll Lock.
+    Scroll,
+    /// Pause/Break key, next to Scroll lock.
+    Pause,
+
+    /// `Insert`, next to Backspace.
+    Insert,
+    Home,
+    Delete,
+    End,
+    PageDown,
+    PageUp,
+
+    Left,
+    Up,
+    Right,
+    Down,
+
+    /// The Backspace key, right over Enter.
+    // TODO: rename
+    Back,
+    /// The Enter key.
+    Return,
+    /// The space bar.
+    Space,
+
+    /// The "Compose" key on Linux.
+    Compose,
+
+    Caret,
+
+    Numlock,
+    Numpad0,
+    Numpad1,
+    Numpad2,
+    Numpad3,
+    Numpad4,
+    Numpad5,
+    Numpad6,
+    Numpad7,
+    Numpad8,
+    Numpad9,
+
+    AbntC1,
+    AbntC2,
+    Add,
+    Apostrophe,
+    Apps,
+    At,
+    Ax,
+    Backslash,
+    Calculator,
+    Capital,
+    Colon,
+    Comma,
+    Convert,
+    Decimal,
+    Divide,
+    Equals,
+    Grave,
+    Kana,
+    Kanji,
+    LAlt,
+    LBracket,
+    LControl,
+    LShift,
+    LWin,
+    Mail,
+    MediaSelect,
+    MediaStop,
+    Minus,
+    Multiply,
+    Mute,
+    MyComputer,
+    NavigateForward,  // also called "Prior"
+    NavigateBackward, // also called "Next"
+    NextTrack,
+    NoConvert,
+    NumpadComma,
+    NumpadEnter,
+    NumpadEquals,
+    OEM102,
+    Period,
+    PlayPause,
+    Power,
+    PrevTrack,
+    RAlt,
+    RBracket,
+    RControl,
+    RShift,
+    RWin,
+    Semicolon,
+    Slash,
+    Sleep,
+    Stop,
+    Subtract,
+    Sysrq,
+    Tab,
+    Underline,
+    Unlabeled,
+    VolumeDown,
+    VolumeUp,
+    Wake,
+    WebBack,
+    WebFavorites,
+    WebForward,
+    WebHome,
+    WebRefresh,
+    WebSearch,
+    WebStop,
+    Yen,
+    Copy,
+    Paste,
+    Cut,
+}

src/input/mouse.rs

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+mod button;
+mod event;
+
+pub use button::Button;
+pub use event::Event;

src/input/mouse/button.rs

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+#[derive(Debug, Hash, PartialEq, Eq, Clone, Copy)]
+pub enum Button {
+    Left,
+    Right,
+    Middle,
+    Other(u8),
+}

src/input/mouse/event.rs

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+use super::Button;
+use crate::input::ButtonState;
+
+/// A mouse event.
+#[derive(Debug, Clone, Copy, PartialEq)]
+pub enum Event {
+    /// The mouse cursor entered the window.
+    CursorEntered,
+
+    /// The mouse cursor left the window.
+    CursorLeft,
+
+    /// The mouse cursor was moved
+    CursorMoved {
+        /// The X coordinate of the mouse position
+        x: f32,
+
+        /// The Y coordinate of the mouse position
+        y: f32,
+    },
+
+    /// A mouse button was pressed or released.
+    Input {
+        /// The state of the button
+        state: ButtonState,
+
+        /// The button identifier
+        button: Button,
+    },
+
+    /// The mouse wheel was scrolled.
+    WheelScrolled {
+        /// The number of horizontal lines scrolled
+        delta_x: f32,
+
+        /// The number of vertical lines scrolled
+        delta_y: f32,
+    },
+}