1 files changed, 42 insertions, 0 deletions
diff --git a/devtools/client/inspector/animation/components/graph/DelaySign.js b/devtools/client/inspector/animation/components/graph/DelaySign.js
new file mode 100644
index 0000000000..4e817a9d61
--- /dev/null
+++ b/devtools/client/inspector/animation/components/graph/DelaySign.js
@@ -0,0 +1,42 @@
+/* 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 {
+  PureComponent,
+} = 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");
+
+class DelaySign extends PureComponent {
+  static get propTypes() {
+    return {
+      animation: PropTypes.object.isRequired,
+      timeScale: PropTypes.object.isRequired,
+    };
+  }
+
+  render() {
+    const { animation, timeScale } = this.props;
+    const { delay, isDelayFilled, startTime } = animation.state.absoluteValues;
+
+    const toPercentage = v => (v / timeScale.getDuration()) * 100;
+    const offset = toPercentage(startTime - timeScale.minStartTime);
+    const width = toPercentage(Math.abs(delay));
+
+    return dom.div({
+      className:
+        "animation-delay-sign" +
+        (delay < 0 ? " negative" : "") +
+        (isDelayFilled ? " fill" : ""),
+      style: {
+        width: `${width}%`,
+        marginInlineStart: `${offset}%`,
+      },
+    });
+  }
+}
+
+module.exports = DelaySign;