chore: Move parts of window.rs to winit-core

As winit no longer owns some of the types this requires some adjustments
in the Wayland backend.

Signed-off-by: John Nunley <dev@notgull.net>

winit-core/src/lib.rs

@@ -13,3 +13,4 @@ compile_error! { "no-std and no-alloc usage are not yet supported" }
 pub mod dpi;
 pub mod error;
 pub mod keyboard;
+pub mod window;

winit-core/src/window.rs

@@ -0,0 +1,156 @@
+//! Types used in window construction.
+
+use cursor_icon::CursorIcon;
+
+/// The behavior of cursor grabbing.
+///
+/// Use this enum with [`Window::set_cursor_grab`] to grab the cursor.
+#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+pub enum CursorGrabMode {
+    /// No grabbing of the cursor is performed.
+    None,
+
+    /// The cursor is confined to the window area.
+    ///
+    /// There's no guarantee that the cursor will be hidden. You should hide it by yourself if you
+    /// want to do so.
+    ///
+    /// ## Platform-specific
+    ///
+    /// - **macOS:** Not implemented. Always returns [`ExternalError::NotSupported`] for now.
+    /// - **iOS / Android / Web / Orbital:** Always returns an [`ExternalError::NotSupported`].
+    Confined,
+
+    /// The cursor is locked inside the window area to the certain position.
+    ///
+    /// There's no guarantee that the cursor will be hidden. You should hide it by yourself if you
+    /// want to do so.
+    ///
+    /// ## Platform-specific
+    ///
+    /// - **X11 / Windows:** Not implemented. Always returns [`ExternalError::NotSupported`] for now.
+    /// - **iOS / Android / Orbital:** Always returns an [`ExternalError::NotSupported`].
+    Locked,
+}
+
+/// Defines the orientation that a window resize will be performed.
+#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
+pub enum ResizeDirection {
+    East,
+    North,
+    NorthEast,
+    NorthWest,
+    South,
+    SouthEast,
+    SouthWest,
+    West,
+}
+
+impl From<ResizeDirection> for CursorIcon {
+    fn from(direction: ResizeDirection) -> Self {
+        use ResizeDirection::*;
+        match direction {
+            East => CursorIcon::EResize,
+            North => CursorIcon::NResize,
+            NorthEast => CursorIcon::NeResize,
+            NorthWest => CursorIcon::NwResize,
+            South => CursorIcon::SResize,
+            SouthEast => CursorIcon::SeResize,
+            SouthWest => CursorIcon::SwResize,
+            West => CursorIcon::WResize,
+        }
+    }
+}
+
+/// The theme variant to use.
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+pub enum Theme {
+    /// Use the light variant.
+    Light,
+
+    /// Use the dark variant.
+    Dark,
+}
+
+/// ## Platform-specific
+///
+/// - **X11:** Sets the WM's `XUrgencyHint`. No distinction between [`Critical`] and [`Informational`].
+///
+/// [`Critical`]: Self::Critical
+/// [`Informational`]: Self::Informational
+#[derive(Debug, Clone, Copy, Default, PartialEq, Eq)]
+pub enum UserAttentionType {
+    /// ## Platform-specific
+    ///
+    /// - **macOS:** Bounces the dock icon until the application is in focus.
+    /// - **Windows:** Flashes both the window and the taskbar button until the application is in focus.
+    Critical,
+
+    /// ## Platform-specific
+    ///
+    /// - **macOS:** Bounces the dock icon once.
+    /// - **Windows:** Flashes the taskbar button until the application is in focus.
+    #[default]
+    Informational,
+}
+
+bitflags::bitflags! {
+    #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+    pub struct WindowButtons: u32 {
+        const CLOSE  = 1 << 0;
+        const MINIMIZE  = 1 << 1;
+        const MAXIMIZE  = 1 << 2;
+    }
+}
+
+/// A window level groups windows with respect to their z-position.
+///
+/// The relative ordering between windows in different window levels is fixed.
+/// The z-order of a window within the same window level may change dynamically on user interaction.
+///
+/// ## Platform-specific
+///
+/// - **iOS / Android / Web / Wayland:** Unsupported.
+#[derive(Debug, Default, PartialEq, Eq, Clone, Copy)]
+pub enum WindowLevel {
+    /// The window will always be below normal windows.
+    ///
+    /// This is useful for a widget-based app.
+    AlwaysOnBottom,
+
+    /// The default.
+    #[default]
+    Normal,
+
+    /// The window will always be on top of normal windows.
+    AlwaysOnTop,
+}
+
+/// Generic IME purposes for use in [`Window::set_ime_purpose`].
+///
+/// The purpose may improve UX by optimizing the IME for the specific use case,
+/// if winit can express the purpose to the platform and the platform reacts accordingly.
+///
+/// ## Platform-specific
+///
+/// - **iOS / Android / Web / Windows / X11 / macOS / Orbital:** Unsupported.
+#[derive(Debug, PartialEq, Eq, Clone, Copy)]
+#[non_exhaustive]
+pub enum ImePurpose {
+    /// No special hints for the IME (default).
+    Normal,
+    /// The IME is used for password input.
+    Password,
+    /// The IME is used to input into a terminal.
+    ///
+    /// For example, that could alter OSK on Wayland to show extra buttons.
+    Terminal,
+}
+
+impl Default for ImePurpose {
+    fn default() -> Self {
+        Self::Normal
+    }
+}