Add auto-closing pairs and list continuation to textStokes (Markdown-Editor-like behavior)

crates/rnote-engine/src/strokes/textstroke.rs

@@ -585,7 +585,47 @@ impl TextStroke {
         // translate the text attributes
         self.translate_attrs_after_cursor(cursor.cur_cursor(), text.len() as i32);
 
+        // adds ")" or "] after e. g. "("
+        if let Some(closing) = Self::get_auto_closing_pair(text) {
+            self.text
+                .insert_str(cursor.cur_cursor() + text.len(), closing);
+            self.translate_attrs_after_cursor(
+                cursor.cur_cursor() + text.len(),
+                closing.len() as i32,
+            );
+        }
+
         *cursor = GraphemeCursor::new(cursor.cur_cursor() + text.len(), self.text.len(), true);
+
+        if text == "\n" {
+            let prefix = self.get_last_line_prefix();
+            self.text.insert_str(cursor.cur_cursor(), &prefix);
+            self.translate_attrs_after_cursor(cursor.cur_cursor(), prefix.len() as i32);
+
+            *cursor =
+                GraphemeCursor::new(cursor.cur_cursor() + prefix.len(), self.text.len(), true);
+        }
+    }
+
+    fn get_auto_closing_pair(open: &str) -> Option<&'static str> {
+        match open {
+            "(" => Some(")"),
+            "[" => Some("]"),
+            "{" => Some("}"),
+            "'" => Some("'"),
+            "\"" => Some("\""),
+            _ => None,
+        }
+    }
+
+    fn get_last_line_prefix(&self) -> String {
+        self.text
+            .lines()
+            .last()
+            .unwrap_or("")
+            .chars()
+            .take_while(|&ch| matches!(ch, ' ' | '\t' | '-' | '*' | '.'))
+            .collect()
     }
 
     pub fn remove_grapheme_before_cursor(&mut self, cursor: &mut GraphemeCursor) {