tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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CurrentTimeScrubber.js (4225B)

      1 /* This Source Code Form is subject to the terms of the Mozilla Public
      2 * License, v. 2.0. If a copy of the MPL was not distributed with this
      3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      4 
      5 "use strict";
      6 
      7 const DevToolsUtils = require("resource://devtools/shared/DevToolsUtils.js");
      8 const {
      9  createRef,
     10  PureComponent,
     11 } = require("resource://devtools/client/shared/vendor/react.mjs");
     12 const dom = require("resource://devtools/client/shared/vendor/react-dom-factories.js");
     13 const PropTypes = require("resource://devtools/client/shared/vendor/react-prop-types.mjs");
     14 
     15 class CurrentTimeScrubber extends PureComponent {
     16  static get propTypes() {
     17    return {
     18      addAnimationsCurrentTimeListener: PropTypes.func.isRequired,
     19      direction: PropTypes.string.isRequired,
     20      removeAnimationsCurrentTimeListener: PropTypes.func.isRequired,
     21      setAnimationsCurrentTime: PropTypes.func.isRequired,
     22      timeScale: PropTypes.object.isRequired,
     23    };
     24  }
     25 
     26  constructor(props) {
     27    super(props);
     28 
     29    this._ref = createRef();
     30 
     31    const { addAnimationsCurrentTimeListener } = props;
     32    this.onCurrentTimeUpdated = this.onCurrentTimeUpdated.bind(this);
     33    this.onMouseDown = this.onMouseDown.bind(this);
     34    this.onMouseMove = this.onMouseMove.bind(this);
     35    this.onMouseUp = this.onMouseUp.bind(this);
     36 
     37    addAnimationsCurrentTimeListener(this.onCurrentTimeUpdated);
     38  }
     39 
     40  componentDidMount() {
     41    const current = this._ref.current;
     42    current.addEventListener("mousedown", this.onMouseDown);
     43    this._scrubber = current.querySelector(".current-time-scrubber");
     44  }
     45 
     46  componentWillUnmount() {
     47    const { removeAnimationsCurrentTimeListener } = this.props;
     48    removeAnimationsCurrentTimeListener(this.onCurrentTimeUpdated);
     49  }
     50 
     51  onCurrentTimeUpdated(currentTime) {
     52    const { timeScale } = this.props;
     53 
     54    const position = currentTime / timeScale.getDuration();
     55    // onCurrentTimeUpdated is bound to requestAnimationFrame.
     56    // As to update the component too frequently has performance issue if React controlled,
     57    // update raw component directly. See Bug 1699039.
     58    this._scrubber.style.marginInlineStart = `${position * 100}%`;
     59  }
     60 
     61  onMouseDown(event) {
     62    event.stopPropagation();
     63    const current = this._ref.current;
     64    this.controllerArea = current.getBoundingClientRect();
     65    this.listenerTarget = DevToolsUtils.getTopWindow(current.ownerGlobal);
     66    this.listenerTarget.addEventListener("mousemove", this.onMouseMove);
     67    this.listenerTarget.addEventListener("mouseup", this.onMouseUp);
     68    this.decorationTarget = current.closest(".animation-list-container");
     69    this.decorationTarget.classList.add("active-scrubber");
     70 
     71    this.updateAnimationsCurrentTime(event.pageX, true);
     72  }
     73 
     74  onMouseMove(event) {
     75    event.stopPropagation();
     76    this.isMouseMoved = true;
     77    this.updateAnimationsCurrentTime(event.pageX);
     78  }
     79 
     80  onMouseUp(event) {
     81    event.stopPropagation();
     82 
     83    if (this.isMouseMoved) {
     84      this.updateAnimationsCurrentTime(event.pageX, true);
     85      this.isMouseMoved = null;
     86    }
     87 
     88    this.uninstallListeners();
     89  }
     90 
     91  uninstallListeners() {
     92    this.listenerTarget.removeEventListener("mousemove", this.onMouseMove);
     93    this.listenerTarget.removeEventListener("mouseup", this.onMouseUp);
     94    this.listenerTarget = null;
     95    this.decorationTarget.classList.remove("active-scrubber");
     96    this.decorationTarget = null;
     97    this.controllerArea = null;
     98  }
     99 
    100  updateAnimationsCurrentTime(pageX, needRefresh) {
    101    const { direction, setAnimationsCurrentTime, timeScale } = this.props;
    102 
    103    let progressRate =
    104      (pageX - this.controllerArea.x) / this.controllerArea.width;
    105 
    106    if (progressRate < 0.0) {
    107      progressRate = 0.0;
    108    } else if (progressRate > 1.0) {
    109      progressRate = 1.0;
    110    }
    111 
    112    const time =
    113      direction === "ltr"
    114        ? progressRate * timeScale.getDuration()
    115        : (1 - progressRate) * timeScale.getDuration();
    116 
    117    setAnimationsCurrentTime(time, needRefresh);
    118  }
    119 
    120  render() {
    121    return dom.div(
    122      {
    123        className: "current-time-scrubber-area",
    124        ref: this._ref,
    125      },
    126      dom.div({ className: "indication-bar current-time-scrubber" })
    127    );
    128  }
    129 }
    130 
    131 module.exports = CurrentTimeScrubber;