1 files changed, 108 insertions, 0 deletions
diff --git a/devtools/client/inspector/animation/components/PlaybackRateSelector.js b/devtools/client/inspector/animation/components/PlaybackRateSelector.js
new file mode 100644
index 0000000000..2d0de53a0c
--- /dev/null
+++ b/devtools/client/inspector/animation/components/PlaybackRateSelector.js
@@ -0,0 +1,108 @@
+/* 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");
+const {
+  connect,
+} = require("resource://devtools/client/shared/vendor/react-redux.js");
+
+const {
+  getFormatStr,
+} = require("resource://devtools/client/inspector/animation/utils/l10n.js");
+
+const PLAYBACK_RATES = [0.1, 0.25, 0.5, 1, 2, 5, 10];
+
+class PlaybackRateSelector extends PureComponent {
+  static get propTypes() {
+    return {
+      animations: PropTypes.arrayOf(PropTypes.object).isRequired,
+      playbackRates: PropTypes.arrayOf(PropTypes.number).isRequired,
+      setAnimationsPlaybackRate: PropTypes.func.isRequired,
+    };
+  }
+
+  static getDerivedStateFromProps(props, state) {
+    const { animations, playbackRates } = props;
+
+    const currentPlaybackRates = sortAndUnique(
+      animations.map(a => a.state.playbackRate)
+    );
+    const options = sortAndUnique([
+      ...PLAYBACK_RATES,
+      ...playbackRates,
+      ...currentPlaybackRates,
+    ]);
+
+    if (currentPlaybackRates.length === 1) {
+      return {
+        options,
+        selected: currentPlaybackRates[0],
+      };
+    }
+
+    // When the animations displayed have mixed playback rates, we can't
+    // select any of the predefined ones.
+    return {
+      options: ["", ...options],
+      selected: "",
+    };
+  }
+
+  constructor(props) {
+    super(props);
+
+    this.state = {
+      options: [],
+      selected: 1,
+    };
+  }
+
+  onChange(e) {
+    const { setAnimationsPlaybackRate } = this.props;
+
+    if (!e.target.value) {
+      return;
+    }
+
+    setAnimationsPlaybackRate(e.target.value);
+  }
+
+  render() {
+    const { options, selected } = this.state;
+
+    return dom.select(
+      {
+        className: "playback-rate-selector devtools-button",
+        onChange: this.onChange.bind(this),
+      },
+      options.map(rate => {
+        return dom.option(
+          {
+            selected: rate === selected ? "true" : null,
+            value: rate,
+          },
+          rate ? getFormatStr("player.playbackRateLabel", rate) : "-"
+        );
+      })
+    );
+  }
+}
+
+function sortAndUnique(array) {
+  return [...new Set(array)].sort((a, b) => a > b);
+}
+
+const mapStateToProps = state => {
+  return {
+    playbackRates: state.animations.playbackRates,
+  };
+};
+
+module.exports = connect(mapStateToProps)(PlaybackRateSelector);