Implement Enter

src/buffer.rs

@@ -392,8 +392,28 @@ impl<'a> TextBuffer<'a> {
                 self.redraw = true;
                 self.shape_until_scroll();
             },
-            TextAction::Insert(character) => {
+            TextAction::Insert(character) => match character {
+                '\r' | '\n' => {
                     //TODO: handle Enter
+                    let line = &self.layout_lines[self.cursor.line];
+                    let new_line = if self.cursor.glyph >= line.glyphs.len() {
+                        String::new()
+                    } else {
+                        let glyph = &line.glyphs[self.cursor.glyph];
+                        self.text_lines[line.line_i.get()].split_off(glyph.start)
+                    };
+                    self.text_lines.insert(line.line_i.get() + 1, new_line);
+
+                    // Reshape all lines after new line
+                    //TODO: improve performance
+                    self.shape_lines.truncate(line.line_i.get());
+                    self.relayout();
+                    self.shape_until_scroll();
+
+                    self.cursor.glyph = 0;
+                    self.cursor.line += 1;
+                },
+                _ => {
                     let line = &self.layout_lines[self.cursor.line];
                     if self.cursor.glyph >= line.glyphs.len() {
                         match line.glyphs.last() {
@@ -417,6 +437,7 @@ impl<'a> TextBuffer<'a> {
                         self.cursor.glyph += 1;
                         self.reshape_line(line.line_i);
                     }
+                }
             },
             TextAction::Click { x, y } => {
                 self.select_opt = None;