1 files changed, 82 insertions, 0 deletions
diff --git a/devtools/client/inspector/markup/views/read-only-editor.js b/devtools/client/inspector/markup/views/read-only-editor.js
new file mode 100644
index 0000000000..009abd5af0
--- /dev/null
+++ b/devtools/client/inspector/markup/views/read-only-editor.js
@@ -0,0 +1,82 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+const nodeConstants = require("resource://devtools/shared/dom-node-constants.js");
+
+/**
+ * Creates an editor for non-editable nodes.
+ */
+function ReadOnlyEditor(container, node) {
+  this.container = container;
+  this.markup = this.container.markup;
+  this.buildMarkup();
+
+  if (node.isPseudoElement) {
+    this.tag.classList.add("theme-fg-color3");
+    if (node.isMarkerPseudoElement) {
+      this.tag.textContent = "::marker";
+    } else if (node.isBeforePseudoElement) {
+      this.tag.textContent = "::before";
+    } else if (node.isAfterPseudoElement) {
+      this.tag.textContent = "::after";
+    }
+  } else if (node.nodeType == nodeConstants.DOCUMENT_TYPE_NODE) {
+    this.elt.classList.add("comment", "doctype");
+    this.tag.textContent = node.doctypeString;
+  } else if (node.isShadowRoot) {
+    this.tag.textContent = `#shadow-root (${node.shadowRootMode})`;
+  } else {
+    this.tag.textContent = node.nodeName;
+  }
+
+  // Make the "tag" part of this editor focusable.
+  this.tag.setAttribute("tabindex", "-1");
+}
+
+ReadOnlyEditor.prototype = {
+  buildMarkup() {
+    const doc = this.markup.doc;
+
+    this.elt = doc.createElement("span");
+    this.elt.classList.add("editor");
+
+    this.tag = doc.createElement("span");
+    this.tag.classList.add("tag");
+    this.elt.appendChild(this.tag);
+  },
+
+  destroy() {
+    // We might be already destroyed.
+    if (!this.elt) {
+      return;
+    }
+
+    this.elt.remove();
+    this.elt = null;
+    this.tag = null;
+  },
+
+  /**
+   * Show overflow highlight if showOverflowHighlight is true, otherwise hide it.
+   *
+   * @param {Boolean} showOverflowHighlight
+   */
+  setOverflowHighlight(showOverflowHighlight) {
+    this.container.tagState.classList.toggle(
+      "overflow-causing-highlighted",
+      showOverflowHighlight
+    );
+  },
+
+  /**
+   * Stub method for consistency with ElementEditor.
+   */
+  getInfoAtNode() {
+    return null;
+  },
+};
+
+module.exports = ReadOnlyEditor;