Add EditorLabel

EditorLabel.js

@@ -0,0 +1,109 @@
+// TODO: Factor out common code with EditorNode
+class EditorLabel extends EditorEntryBase {
+  constructor() {
+    super();
+
+    this.elem_.classList.add('label');
+
+    this.input_ = document.createElement('input');
+    this.input_.type = 'text';
+    this.input_.placeholder = 'label';
+    this.listen(this.input_, 'keydown', (e) => this.onInputKeyDown(e));
+    this.listen(this.input_, 'input', (e) => this.onInput());
+    this.elem_.appendChild(this.input_);
+  }
+
+  afterDomAdd() {
+    this.input_.focus();
+  }
+
+  serialize() {
+    return {
+      type: 'label',
+      label: this.getLabel(),
+    };
+  }
+
+  exportGraphviz() {
+    return [];
+  }
+
+  getLabel() {
+    return this.input_.value;
+  }
+
+  setLabel(label) {
+    this.input_.value = label;
+    this.onInput();
+  }
+
+  getElement() {
+    return this.elem_;
+  }
+
+  wantFocus() {
+    return this.getLabel() == '';
+  }
+
+  onInput() {
+    this.input_.setAttribute('data-arch-value', this.input_.value);
+  }
+
+  onInputKeyDown(e) {
+    switch (e.key) {
+      case 'Enter':
+        e.stopPropagation();
+        if (this.elem_.nextElementSibling &&
+            this.elem_.nextElementSibling.xArchObj &&
+            this.elem_.nextElementSibling.xArchObj.wantFocus()) {
+          this.elem_.nextElementSibling.xArchObj.startEdit();
+        } else {
+          this.stopEdit();
+        }
+        break;
+
+      case 'Escape':
+        e.stopPropagation();
+        this.stopEdit();
+        break;
+
+      case 'ArrowUp':
+      case 'ArrowDown':
+      case 'PageUp':
+      case 'PageDown':
+        this.stopEdit();
+        break;
+
+      default:
+        e.stopPropagation();
+        break;
+    }
+  }
+
+  onKeyDown(e) {
+    super.onKeyDown(e);
+
+    switch (e.key) {
+      case 'Enter':
+        this.startEdit();
+        e.stopPropagation();
+        e.preventDefault();
+        break;
+    }
+  }
+
+  startEdit() {
+    this.input_.focus();
+  }
+
+  stopEdit() {
+    this.elem_.focus();
+  }
+
+  static unserialize(ser) {
+    let label = new EditorLabel();
+    label.setLabel(ser.label);
+    return label.getElement();
+  }
+}
+