DevTools: extract modules (non-extensions)

third_party/WebKit/Source/devtools/front_end/ui/BezierEditor.js

-// Copyright (c) 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-/**
- * @unrestricted
- */
-UI.BezierEditor = class extends UI.VBox {
-  constructor() {
-    super(true);
-    this.registerRequiredCSS('ui/bezierEditor.css');
-    this.contentElement.tabIndex = 0;
-    this.setDefaultFocusedElement(this.contentElement);
-
-    // Preview UI
-    this._previewElement = this.contentElement.createChild('div', 'bezier-preview-container');
-    this._previewElement.createChild('div', 'bezier-preview-animation');
-    this._previewElement.addEventListener('click', this._startPreviewAnimation.bind(this));
-    this._previewOnion = this.contentElement.createChild('div', 'bezier-preview-onion');
-    this._previewOnion.addEventListener('click', this._startPreviewAnimation.bind(this));
-
-    this._outerContainer = this.contentElement.createChild('div', 'bezier-container');
-
-    // Presets UI
-    this._presetsContainer = this._outerContainer.createChild('div', 'bezier-presets');
-    this._presetUI = new UI.BezierUI(40, 40, 0, 2, false);
-    this._presetCategories = [];
-    for (var i = 0; i < UI.BezierEditor.Presets.length; i++) {
-      this._presetCategories[i] = this._createCategory(UI.BezierEditor.Presets[i]);
-      this._presetsContainer.appendChild(this._presetCategories[i].icon);
-    }
-
-    // Curve UI
-    this._curveUI = new UI.BezierUI(150, 250, 50, 7, true);
-    this._curve = this._outerContainer.createSVGChild('svg', 'bezier-curve');
-    UI.installDragHandle(
-        this._curve, this._dragStart.bind(this), this._dragMove.bind(this), this._dragEnd.bind(this), 'default');
-
-    this._header = this.contentElement.createChild('div', 'bezier-header');
-    var minus = this._createPresetModifyIcon(this._header, 'bezier-preset-minus', 'M 12 6 L 8 10 L 12 14');
-    var plus = this._createPresetModifyIcon(this._header, 'bezier-preset-plus', 'M 8 6 L 12 10 L 8 14');
-    minus.addEventListener('click', this._presetModifyClicked.bind(this, false));
-    plus.addEventListener('click', this._presetModifyClicked.bind(this, true));
-    this._label = this._header.createChild('span', 'source-code bezier-display-value');
-  }
-
-  /**
-   * @param {?Common.Geometry.CubicBezier} bezier
-   */
-  setBezier(bezier) {
-    if (!bezier)
-      return;
-    this._bezier = bezier;
-    this._updateUI();
-  }
-
-  /**
-   * @return {!Common.Geometry.CubicBezier}
-   */
-  bezier() {
-    return this._bezier;
-  }
-
-  /**
-   * @override
-   */
-  wasShown() {
-    this._unselectPresets();
-    // Check if bezier matches a preset
-    for (var category of this._presetCategories) {
-      for (var i = 0; i < category.presets.length; i++) {
-        if (this._bezier.asCSSText() === category.presets[i].value) {
-          category.presetIndex = i;
-          this._presetCategorySelected(category);
-        }
-      }
-    }
-
-    this._updateUI();
-    this._startPreviewAnimation();
-  }
-
-  _onchange() {
-    this._updateUI();
-    this.dispatchEventToListeners(UI.BezierEditor.Events.BezierChanged, this._bezier.asCSSText());
-  }
-
-  _updateUI() {
-    var labelText = this._selectedCategory ? this._selectedCategory.presets[this._selectedCategory.presetIndex].name :
-                                             this._bezier.asCSSText().replace(/\s(-\d\.\d)/g, '$1');
-    this._label.textContent = Common.UIString(labelText);
-    this._curveUI.drawCurve(this._bezier, this._curve);
-    this._previewOnion.removeChildren();
-  }
-
-  /**
-   * @param {!Event} event
-   * @return {boolean}
-   */
-  _dragStart(event) {
-    this._mouseDownPosition = new Common.Geometry.Point(event.x, event.y);
-    var ui = this._curveUI;
-    this._controlPosition = new Common.Geometry.Point(
-        Number.constrain((event.offsetX - ui.radius) / ui.curveWidth(), 0, 1),
-        (ui.curveHeight() + ui.marginTop + ui.radius - event.offsetY) / ui.curveHeight());
-
-    var firstControlPointIsCloser = this._controlPosition.distanceTo(this._bezier.controlPoints[0]) <
-        this._controlPosition.distanceTo(this._bezier.controlPoints[1]);
-    this._selectedPoint = firstControlPointIsCloser ? 0 : 1;
-
-    this._bezier.controlPoints[this._selectedPoint] = this._controlPosition;
-    this._unselectPresets();
-    this._onchange();
-
-    event.consume(true);
-    return true;
-  }
-
-  /**
-   * @param {number} mouseX
-   * @param {number} mouseY
-   */
-  _updateControlPosition(mouseX, mouseY) {
-    var deltaX = (mouseX - this._mouseDownPosition.x) / this._curveUI.curveWidth();
-    var deltaY = (mouseY - this._mouseDownPosition.y) / this._curveUI.curveHeight();
-    var newPosition = new Common.Geometry.Point(
-        Number.constrain(this._controlPosition.x + deltaX, 0, 1), this._controlPosition.y - deltaY);
-    this._bezier.controlPoints[this._selectedPoint] = newPosition;
-  }
-
-  /**
-   * @param {!Event} event
-   */
-  _dragMove(event) {
-    this._updateControlPosition(event.x, event.y);
-    this._onchange();
-  }
-
-  /**
-   * @param {!Event} event
-   */
-  _dragEnd(event) {
-    this._updateControlPosition(event.x, event.y);
-    this._onchange();
-    this._startPreviewAnimation();
-  }
-
-  /**
-   * @param {!Array<{name: string, value: string}>} presetGroup
-   * @return {!UI.BezierEditor.PresetCategory}
-   */
-  _createCategory(presetGroup) {
-    var presetElement = createElementWithClass('div', 'bezier-preset-category');
-    var iconElement = presetElement.createSVGChild('svg', 'bezier-preset monospace');
-    var category = {presets: presetGroup, presetIndex: 0, icon: presetElement};
-    this._presetUI.drawCurve(Common.Geometry.CubicBezier.parse(category.presets[0].value), iconElement);
-    iconElement.addEventListener('click', this._presetCategorySelected.bind(this, category));
-    return category;
-  }
-
-  /**
-   * @param {!Element} parentElement
-   * @param {string} className
-   * @param {string} drawPath
-   * @return {!Element}
-   */
-  _createPresetModifyIcon(parentElement, className, drawPath) {
-    var icon = parentElement.createSVGChild('svg', 'bezier-preset-modify ' + className);
-    icon.setAttribute('width', 20);
-    icon.setAttribute('height', 20);
-    var path = icon.createSVGChild('path');
-    path.setAttribute('d', drawPath);
-    return icon;
-  }
-
-  _unselectPresets() {
-    for (var category of this._presetCategories)
-      category.icon.classList.remove('bezier-preset-selected');
-    delete this._selectedCategory;
-    this._header.classList.remove('bezier-header-active');
-  }
-
-  /**
-   * @param {!UI.BezierEditor.PresetCategory} category
-   * @param {!Event=} event
-   */
-  _presetCategorySelected(category, event) {
-    if (this._selectedCategory === category)
-      return;
-    this._unselectPresets();
-    this._header.classList.add('bezier-header-active');
-    this._selectedCategory = category;
-    this._selectedCategory.icon.classList.add('bezier-preset-selected');
-    this.setBezier(Common.Geometry.CubicBezier.parse(category.presets[category.presetIndex].value));
-    this._onchange();
-    this._startPreviewAnimation();
-    if (event)
-      event.consume(true);
-  }
-
-  /**
-   * @param {boolean} intensify
-   * @param {!Event} event
-   */
-  _presetModifyClicked(intensify, event) {
-    if (!this._selectedCategory)
-      return;
-
-    var length = this._selectedCategory.presets.length;
-    this._selectedCategory.presetIndex = (this._selectedCategory.presetIndex + (intensify ? 1 : -1) + length) % length;
-    this.setBezier(
-        Common.Geometry.CubicBezier.parse(this._selectedCategory.presets[this._selectedCategory.presetIndex].value));
-    this._onchange();
-    this._startPreviewAnimation();
-  }
-
-  _startPreviewAnimation() {
-    if (this._previewAnimation)
-      this._previewAnimation.cancel();
-
-    const animationDuration = 1600;
-    const numberOnionSlices = 20;
-
-    var keyframes = [
-      {offset: 0, transform: 'translateX(0px)', easing: this._bezier.asCSSText(), opacity: 1},
-      {offset: 0.9, transform: 'translateX(218px)', opacity: 1},
-      {offset: 1, transform: 'translateX(218px)', opacity: 0}
-    ];
-    this._previewAnimation = this._previewElement.animate(keyframes, animationDuration);
-    this._previewOnion.removeChildren();
-    for (var i = 0; i <= numberOnionSlices; i++) {
-      var slice = this._previewOnion.createChild('div', 'bezier-preview-animation');
-      var player = slice.animate(
-          [{transform: 'translateX(0px)', easing: this._bezier.asCSSText()}, {transform: 'translateX(218px)'}],
-          {duration: animationDuration, fill: 'forwards'});
-      player.pause();
-      player.currentTime = animationDuration * i / numberOnionSlices;
-    }
-  }
-};
-
-/** @enum {symbol} */
-UI.BezierEditor.Events = {
-  BezierChanged: Symbol('BezierChanged')
-};
-
-UI.BezierEditor.Presets = [
-  [
-    {name: 'ease-in-out', value: 'ease-in-out'}, {name: 'In Out · Sine', value: 'cubic-bezier(0.45, 0.05, 0.55, 0.95)'},
-    {name: 'In Out · Quadratic', value: 'cubic-bezier(0.46, 0.03, 0.52, 0.96)'},
-    {name: 'In Out · Cubic', value: 'cubic-bezier(0.65, 0.05, 0.36, 1)'},
-    {name: 'Fast Out, Slow In', value: 'cubic-bezier(0.4, 0, 0.2, 1)'},
-    {name: 'In Out · Back', value: 'cubic-bezier(0.68, -0.55, 0.27, 1.55)'}
-  ],
-  [
-    {name: 'Fast Out, Linear In', value: 'cubic-bezier(0.4, 0, 1, 1)'}, {name: 'ease-in', value: 'ease-in'},
-    {name: 'In · Sine', value: 'cubic-bezier(0.47, 0, 0.75, 0.72)'},
-    {name: 'In · Quadratic', value: 'cubic-bezier(0.55, 0.09, 0.68, 0.53)'},
-    {name: 'In · Cubic', value: 'cubic-bezier(0.55, 0.06, 0.68, 0.19)'},
-    {name: 'In · Back', value: 'cubic-bezier(0.6, -0.28, 0.74, 0.05)'}
-  ],
-  [
-    {name: 'ease-out', value: 'ease-out'}, {name: 'Out · Sine', value: 'cubic-bezier(0.39, 0.58, 0.57, 1)'},
-    {name: 'Out · Quadratic', value: 'cubic-bezier(0.25, 0.46, 0.45, 0.94)'},
-    {name: 'Out · Cubic', value: 'cubic-bezier(0.22, 0.61, 0.36, 1)'},
-    {name: 'Linear Out, Slow In', value: 'cubic-bezier(0, 0, 0.2, 1)'},
-    {name: 'Out · Back', value: 'cubic-bezier(0.18, 0.89, 0.32, 1.28)'}
-  ]
-];
-
-/** @typedef {{presets: !Array.<{name: string, value: string}>, icon: !Element, presetIndex: number}} */
-UI.BezierEditor.PresetCategory;