Merge KeyEventExtra into KeyEvent (#4029)

To make the fields easier to use, and to allow constructing KeyEvent in
user test code.

src/platform_impl/linux/common/xkb/mod.rs

@@ -16,7 +16,6 @@ use {x11_dl::xlib_xcb::xcb_connection_t, xkbcommon_dl::x11::xkbcommon_x11_handle
 
 use crate::event::{ElementState, KeyEvent};
 use crate::keyboard::{Key, KeyLocation};
-use crate::platform_impl::KeyEventExtra;
 use crate::utils::Lazy;
 
 mod compose;
@@ -198,9 +197,16 @@ impl KeyContext<'_> {
         let (key_without_modifiers, _) = event.key_without_modifiers();
         let text_with_all_modifiers = event.text_with_all_modifiers();
 
-        let platform_specific = KeyEventExtra { text_with_all_modifiers, key_without_modifiers };
-
-        KeyEvent { physical_key, logical_key, text, location, state, repeat, platform_specific }
+        KeyEvent {
+            physical_key,
+            logical_key,
+            text,
+            location,
+            state,
+            repeat,
+            text_with_all_modifiers,
+            key_without_modifiers,
+        }
     }
 
     fn keysym_to_utf8_raw(&mut self, keysym: u32) -> Option<SmolStr> {

src/platform_impl/linux/mod.rs

@@ -9,8 +9,6 @@ use std::time::Duration;
 #[cfg(x11_platform)]
 use std::{ffi::CStr, mem::MaybeUninit, os::raw::*, sync::Arc, sync::Mutex};
 
-use smol_str::SmolStr;
-
 pub(crate) use self::common::xkb::{physicalkey_to_scancode, scancode_to_physicalkey};
 #[cfg(x11_platform)]
 use self::x11::{XConnection, XError, XNotSupported};
@@ -22,7 +20,6 @@ use crate::dpi::Size;
 use crate::error::{EventLoopError, NotSupportedError};
 use crate::event_loop::ActiveEventLoop;
 pub(crate) use crate::icon::RgbaIcon as PlatformIcon;
-use crate::keyboard::Key;
 use crate::monitor::VideoMode;
 use crate::platform::pump_events::PumpStatus;
 #[cfg(x11_platform)]
@@ -175,12 +172,6 @@ impl MonitorHandle {
     }
 }
 
-#[derive(Debug, Clone, Eq, PartialEq, Hash)]
-pub struct KeyEventExtra {
-    pub text_with_all_modifiers: Option<SmolStr>,
-    pub key_without_modifiers: Key,
-}
-
 #[derive(Clone, Debug, Eq, Hash, PartialEq)]
 pub(crate) enum PlatformCustomCursor {
     #[cfg(wayland_platform)]