1 files changed, 67 insertions, 0 deletions
diff --git a/devtools/client/inspector/animation/components/keyframes-graph/DiscretePath.js b/devtools/client/inspector/animation/components/keyframes-graph/DiscretePath.js
new file mode 100644
index 0000000000..26e5373f7c
--- /dev/null
+++ b/devtools/client/inspector/animation/components/keyframes-graph/DiscretePath.js
@@ -0,0 +1,67 @@
+/* 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 dom = require("resource://devtools/client/shared/vendor/react-dom-factories.js");
+const PropTypes = require("resource://devtools/client/shared/vendor/react-prop-types.js");
+
+const ComputedStylePath = require("resource://devtools/client/inspector/animation/components/keyframes-graph/ComputedStylePath.js");
+
+class DiscretePath extends ComputedStylePath {
+  static get propTypes() {
+    return {
+      name: PropTypes.string.isRequired,
+    };
+  }
+
+  constructor(props) {
+    super(props);
+
+    this.state = this.propToState(props);
+  }
+
+  // FIXME: https://bugzilla.mozilla.org/show_bug.cgi?id=1774507
+  UNSAFE_componentWillReceiveProps(nextProps) {
+    this.setState(this.propToState(nextProps));
+  }
+
+  getPropertyName() {
+    return this.props.name;
+  }
+
+  getPropertyValue(keyframe) {
+    return keyframe.value;
+  }
+
+  propToState({ getComputedStyle, keyframes, name }) {
+    const discreteValues = [];
+
+    for (const keyframe of keyframes) {
+      const style = getComputedStyle(name, { [name]: keyframe.value });
+
+      if (!discreteValues.includes(style)) {
+        discreteValues.push(style);
+      }
+    }
+
+    return { discreteValues };
+  }
+
+  toSegmentValue(computedStyle) {
+    const { discreteValues } = this.state;
+    return discreteValues.indexOf(computedStyle) / (discreteValues.length - 1);
+  }
+
+  render() {
+    return dom.g(
+      {
+        className: "discrete-path",
+      },
+      super.renderGraph()
+    );
+  }
+}
+
+module.exports = DiscretePath;