event system!!!

src/core/text_edit.rs

@@ -1,5 +1,5 @@
 use crate::prelude::*;
-use cosmic_text::{Attrs, Cursor, Family, FontSystem, Metrics, Motion, Shaping};
+use cosmic_text::{Affinity, Attrs, Cursor, Family, FontSystem, Metrics, Motion, Shaping};
 use unicode_segmentation::UnicodeSegmentation;
 use winit::{
     event::KeyEvent,
@@ -133,6 +133,11 @@ impl<'a> TextEditCtx<'a> {
         self.text
             .buf
             .set_text(self.font_system, "", &Attrs::new(), Shaping::Advanced);
+        if let Some(cursor) = &mut self.text.cursor {
+            cursor.line = 0;
+            cursor.index = 0;
+            cursor.affinity = Affinity::default();
+        }
         text
     }
 
@@ -219,13 +224,19 @@ impl<'a> TextEditCtx<'a> {
         self.text.cursor = None;
     }
 
-    pub fn apply_event(&mut self, event: &KeyEvent) -> TextInputResult {
+    pub fn apply_event(&mut self, event: &KeyEvent, modifiers: &Modifiers) -> TextInputResult {
         match &event.logical_key {
             Key::Named(named) => match named {
                 NamedKey::Backspace => self.backspace(),
                 NamedKey::Delete => self.delete(),
                 NamedKey::Space => self.insert(" "),
-                NamedKey::Enter => self.insert("\n"),
+                NamedKey::Enter => {
+                    if modifiers.shift {
+                        self.newline();
+                    } else {
+                        return TextInputResult::Submit;
+                    }
+                }
                 NamedKey::ArrowRight => self.motion(Motion::Right),
                 NamedKey::ArrowLeft => self.motion(Motion::Left),
                 NamedKey::ArrowUp => self.motion(Motion::Up),
@@ -243,10 +254,24 @@ impl<'a> TextEditCtx<'a> {
     }
 }
 
+#[derive(Default)]
+pub struct Modifiers {
+    pub shift: bool,
+    pub control: bool,
+}
+
+impl Modifiers {
+    pub fn clear(&mut self) {
+        self.shift = false;
+        self.control = false;
+    }
+}
+
 pub enum TextInputResult {
     Used,
     Unused,
     Unfocus,
+    Submit,
 }
 
 impl TextInputResult {