1 files changed, 75 insertions, 0 deletions
diff --git a/devtools/client/netmonitor/src/components/previews/HtmlPreview.js b/devtools/client/netmonitor/src/components/previews/HtmlPreview.js
new file mode 100644
index 0000000000..ab8c24fac0
--- /dev/null
+++ b/devtools/client/netmonitor/src/components/previews/HtmlPreview.js
@@ -0,0 +1,75 @@
+/* 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 {
+  Component,
+} = require("resource://devtools/client/shared/vendor/react.js");
+const dom = require("resource://devtools/client/shared/vendor/react-dom-factories.js");
+const PropTypes = require("resource://devtools/client/shared/vendor/react-prop-types.js");
+
+/*
+ * Response preview component
+ * Display HTML content within a sandbox enabled iframe
+ */
+class HTMLPreview extends Component {
+  static get propTypes() {
+    return {
+      responseContent: PropTypes.object.isRequired,
+    };
+  }
+
+  componentDidMount() {
+    const { container } = this.refs;
+    const iframe = container.ownerDocument.createXULElement("iframe");
+    this.iframe = iframe;
+    iframe.setAttribute("type", "content");
+    iframe.setAttribute("remote", "true");
+
+    // For some reason, when we try to select some text,
+    // a drag of the whole page is initiated.
+    // Workaround this by canceling any start of drag.
+    iframe.addEventListener("dragstart", e => e.preventDefault(), {
+      capture: true,
+    });
+
+    // Bug 1800916 allow interaction with the preview page until
+    // we find a way to prevent navigation without preventing copy paste from it.
+    //
+    // iframe.addEventListener("mousedown", e => e.preventDefault(), {
+    //   capture: true,
+    // });
+    container.appendChild(iframe);
+
+    // browsingContext attribute is only available after the iframe
+    // is attached to the DOM Tree.
+    iframe.browsingContext.allowJavascript = false;
+
+    this.#updatePreview();
+  }
+
+  componentDidUpdate() {
+    this.#updatePreview();
+  }
+
+  componentWillUnmount() {
+    this.iframe.remove();
+  }
+
+  #updatePreview() {
+    const { responseContent } = this.props;
+    const htmlBody = responseContent ? responseContent.content.text : "";
+    this.iframe.setAttribute(
+      "src",
+      "data:text/html;charset=UTF-8," + encodeURIComponent(htmlBody)
+    );
+  }
+
+  render() {
+    return dom.div({ className: "html-preview", ref: "container" });
+  }
+}
+
+module.exports = HTMLPreview;