Add Ctrl+S and indicate when files are dirty

src/text_editor.rs

@@ -24,6 +24,10 @@ pub struct MdTextEdit {
     cursor: Option<CCursorRange>,
 }
 
+pub struct MdTextEditOutput {
+    pub changed: bool,
+}
+
 impl MdTextEdit {
     pub fn new() -> Self {
         MdTextEdit::default()
@@ -36,7 +40,7 @@ impl MdTextEdit {
         }
     }
 
-    pub fn ui(&mut self, ui: &mut Ui) {
+    pub fn ui(&mut self, ui: &mut Ui) -> MdTextEditOutput {
         let Self {
             text,
             highlighter,
@@ -72,6 +76,10 @@ impl MdTextEdit {
             *cursor = text_edit.cursor_range;
             //ui.ctx().request_repaint();
         }
+
+        MdTextEditOutput {
+            changed: text_edit.response.changed(),
+        }
     }
 }