https://mogilevkino.by/uploads/images/PrefIcon/effect.js

1var VanillaTilt = (function () {
2'use strict';
3
4/**
5 * Created by Sergiu Șandor (micku7zu) on 1/27/2017.
6 * Original idea: https://github.com/gijsroge/tilt.js
7 * MIT License.
8 * Version 1.8.1
9 */
10
11class VanillaTilt {
12  constructor(element, settings = {}) {
13    if (!(element instanceof Node)) {
14      throw ("Can't initialize VanillaTilt because " + element + " is not a Node.");
15    }
16
17    this.width = null;
18    this.height = null;
19    this.clientWidth = null;
20    this.clientHeight = null;
21    this.left = null;
22    this.top = null;
23
24    // for Gyroscope sampling
25    this.gammazero = null;
26    this.betazero = null;
27    this.lastgammazero = null;
28    this.lastbetazero = null;
29
30    this.transitionTimeout = null;
31    this.updateCall = null;
32    this.event = null;
33
34    this.updateBind = this.update.bind(this);
35    this.resetBind = this.reset.bind(this);
36
37    this.element = element;
38    this.settings = this.extendSettings(settings);
39
40    this.reverse = this.settings.reverse ? -1 : 1;
41    this.resetToStart = VanillaTilt.isSettingTrue(this.settings["reset-to-start"]);
42    this.glare = VanillaTilt.isSettingTrue(this.settings.glare);
43    this.glarePrerender = VanillaTilt.isSettingTrue(this.settings["glare-prerender"]);
44    this.fullPageListening = VanillaTilt.isSettingTrue(this.settings["full-page-listening"]);
45    this.gyroscope = VanillaTilt.isSettingTrue(this.settings.gyroscope);
46    this.gyroscopeSamples = this.settings.gyroscopeSamples;
47
48    this.elementListener = this.getElementListener();
49
50    if (this.glare) {
51      this.prepareGlare();
52    }
53
54    if (this.fullPageListening) {
55      this.updateClientSize();
56    }
57
58    this.addEventListeners();
59    this.reset();
60
61    if (this.resetToStart === false) {
62      this.settings.startX = 0;
63      this.settings.startY = 0;
64    }
65  }
66
67  static isSettingTrue(setting) {
68    return setting === "" || setting === true || setting === 1;
69  }
70
71  /**
72   * Method returns element what will be listen mouse events
73   * @return {Node}
74   */
75  getElementListener() {
76    if (this.fullPageListening) {
77      return window.document;
78    }
79
80    if (typeof this.settings["mouse-event-element"] === "string") {
81      const mouseEventElement = document.querySelector(this.settings["mouse-event-element"]);
82
83      if (mouseEventElement) {
84        return mouseEventElement;
85      }
86    }
87
88    if (this.settings["mouse-event-element"] instanceof Node) {
89      return this.settings["mouse-event-element"];
90    }
91
92    return this.element;
93  }
94
95  /**
96   * Method set listen methods for this.elementListener
97   * @return {Node}
98   */
99  addEventListeners() {
100    this.onMouseEnterBind = this.onMouseEnter.bind(this);
101    this.onMouseMoveBind = this.onMouseMove.bind(this);
102    this.onMouseLeaveBind = this.onMouseLeave.bind(this);
103    this.onWindowResizeBind = this.onWindowResize.bind(this);
104    this.onDeviceOrientationBind = this.onDeviceOrientation.bind(this);
105
106    this.elementListener.addEventListener("mouseenter", this.onMouseEnterBind);
107    this.elementListener.addEventListener("mouseleave", this.onMouseLeaveBind);
108    this.elementListener.addEventListener("mousemove", this.onMouseMoveBind);
109
110    if (this.glare || this.fullPageListening) {
111      window.addEventListener("resize", this.onWindowResizeBind);
112    }
113
114    if (this.gyroscope) {
115      window.addEventListener("deviceorientation", this.onDeviceOrientationBind);
116    }
117  }
118
119  /**
120   * Method remove event listeners from current this.elementListener
121   */
122  removeEventListeners() {
123    this.elementListener.removeEventListener("mouseenter", this.onMouseEnterBind);
124    this.elementListener.removeEventListener("mouseleave", this.onMouseLeaveBind);
125    this.elementListener.removeEventListener("mousemove", this.onMouseMoveBind);
126
127    if (this.gyroscope) {
128      window.removeEventListener("deviceorientation", this.onDeviceOrientationBind);
129    }
130
131    if (this.glare || this.fullPageListening) {
132      window.removeEventListener("resize", this.onWindowResizeBind);
133    }
134  }
135
136  destroy() {
137    clearTimeout(this.transitionTimeout);
138    if (this.updateCall !== null) {
139      cancelAnimationFrame(this.updateCall);
140    }
141
142    this.element.style.willChange = "";
143    this.element.style.transition = "";
144    this.element.style.transform = "";
145    this.resetGlare();
146
147    this.removeEventListeners();
148    this.element.vanillaTilt = null;
149    delete this.element.vanillaTilt;
150
151    this.element = null;
152  }
153
154  onDeviceOrientation(event) {
155    if (event.gamma === null || event.beta === null) {
156      return;
157    }
158
159    this.updateElementPosition();
160
161    if (this.gyroscopeSamples > 0) {
162      this.lastgammazero = this.gammazero;
163      this.lastbetazero = this.betazero;
164
165      if (this.gammazero === null) {
166        this.gammazero = event.gamma;
167        this.betazero = event.beta;
168      } else {
169        this.gammazero = (event.gamma + this.lastgammazero) / 2;
170        this.betazero = (event.beta + this.lastbetazero) / 2;
171      }
172
173      this.gyroscopeSamples -= 1;
174    }
175
176    const totalAngleX = this.settings.gyroscopeMaxAngleX - this.settings.gyroscopeMinAngleX;
177    const totalAngleY = this.settings.gyroscopeMaxAngleY - this.settings.gyroscopeMinAngleY;
178
179    const degreesPerPixelX = totalAngleX / this.width;
180    const degreesPerPixelY = totalAngleY / this.height;
181
182    const angleX = event.gamma - (this.settings.gyroscopeMinAngleX + this.gammazero);
183    const angleY = event.beta - (this.settings.gyroscopeMinAngleY + this.betazero);
184
185    const posX = angleX / degreesPerPixelX;
186    const posY = angleY / degreesPerPixelY;
187
188    if (this.updateCall !== null) {
189      cancelAnimationFrame(this.updateCall);
190    }
191
192    this.event = {
193      clientX: posX + this.left,
194      clientY: posY + this.top,
195    };
196
197    this.updateCall = requestAnimationFrame(this.updateBind);
198  }
199
200  onMouseEnter() {
201    this.updateElementPosition();
202    this.element.style.willChange = "transform";
203    this.setTransition();
204  }
205
206  onMouseMove(event) {
207    if (this.updateCall !== null) {
208      cancelAnimationFrame(this.updateCall);
209    }
210
211    this.event = event;
212    this.updateCall = requestAnimationFrame(this.updateBind);
213  }
214
215  onMouseLeave() {
216    this.setTransition();
217
218    if (this.settings.reset) {
219      requestAnimationFrame(this.resetBind);
220    }
221  }
222
223  reset() {
224    this.onMouseEnter();
225
226    if (this.fullPageListening) {
227      this.event = {
228        clientX: (this.settings.startX + this.settings.max) / (2 * this.settings.max) * this.clientWidth,
229        clientY: (this.settings.startY + this.settings.max) / (2 * this.settings.max) * this.clientHeight
230      };
231    } else {
232      this.event = {
233        clientX: this.left + ((this.settings.startX + this.settings.max) / (2 * this.settings.max) * this.width),
234        clientY: this.top + ((this.settings.startY + this.settings.max) / (2 * this.settings.max) * this.height)
235      };
236    }
237
238    let backupScale = this.settings.scale;
239    this.settings.scale = 1;
240    this.update();
241    this.settings.scale = backupScale;
242    this.resetGlare();
243  }
244
245  resetGlare() {
246    if (this.glare) {
247      this.glareElement.style.transform = "rotate(180deg) translate(-50%, -50%)";
248      this.glareElement.style.opacity = "0";
249    }
250  }
251
252  getValues() {
253    let x, y;
254
255    if (this.fullPageListening) {
256      x = this.event.clientX / this.clientWidth;
257      y = this.event.clientY / this.clientHeight;
258    } else {
259      x = (this.event.clientX - this.left) / this.width;
260      y = (this.event.clientY - this.top) / this.height;
261    }
262
263    x = Math.min(Math.max(x, 0), 1);
264    y = Math.min(Math.max(y, 0), 1);
265
266    let tiltX = (this.reverse * (this.settings.max - x * this.settings.max * 2)).toFixed(2);
267    let tiltY = (this.reverse * (y * this.settings.max * 2 - this.settings.max)).toFixed(2);
268    let angle = Math.atan2(this.event.clientX - (this.left + this.width / 2), -(this.event.clientY - (this.top + this.height / 2))) * (180 / Math.PI);
269
270    return {
271      tiltX: tiltX,
272      tiltY: tiltY,
273      percentageX: x * 100,
274      percentageY: y * 100,
275      angle: angle
276    };
277  }
278
279  updateElementPosition() {
280    let rect = this.element.getBoundingClientRect();
281
282    this.width = this.element.offsetWidth;
283    this.height = this.element.offsetHeight;
284    this.left = rect.left;
285    this.top = rect.top;
286  }
287
288  update() {
289    let values = this.getValues();
290
291    this.element.style.transform = "perspective(" + this.settings.perspective + "px) " +
292      "rotateX(" + (this.settings.axis === "x" ? 0 : values.tiltY) + "deg) " +
293      "rotateY(" + (this.settings.axis === "y" ? 0 : values.tiltX) + "deg) " +
294      "scale3d(" + this.settings.scale + ", " + this.settings.scale + ", " + this.settings.scale + ")";
295
296    if (this.glare) {
297      this.glareElement.style.transform = `rotate(${values.angle}deg) translate(-50%, -50%)`;
298      this.glareElement.style.opacity = `${values.percentageY * this.settings["max-glare"] / 100}`;
299    }
300
301    this.element.dispatchEvent(new CustomEvent("tiltChange", {
302      "detail": values
303    }));
304
305    this.updateCall = null;
306  }
307
308  /**
309   * Appends the glare element (if glarePrerender equals false)
310   * and sets the default style
311   */
312  prepareGlare() {
313    // If option pre-render is enabled we assume all html/css is present for an optimal glare effect.
314    if (!this.glarePrerender) {
315      // Create glare element
316      const jsTiltGlare = document.createElement("div");
317      jsTiltGlare.classList.add("js-tilt-glare");
318
319      const jsTiltGlareInner = document.createElement("div");
320      jsTiltGlareInner.classList.add("js-tilt-glare-inner");
321
322      jsTiltGlare.appendChild(jsTiltGlareInner);
323      this.element.appendChild(jsTiltGlare);
324    }
325
326    this.glareElementWrapper = this.element.querySelector(".js-tilt-glare");
327    this.glareElement = this.element.querySelector(".js-tilt-glare-inner");
328
329    if (this.glarePrerender) {
330      return;
331    }
332
333    Object.assign(this.glareElementWrapper.style, {
334      "position": "absolute",
335      "top": "0",
336      "left": "0",
337      "width": "100%",
338      "height": "100%",
339      "overflow": "hidden",
340      "pointer-events": "none",
341      "border-radius": "inherit"
342    });
343
344    Object.assign(this.glareElement.style, {
345      "position": "absolute",
346      "top": "50%",
347      "left": "50%",
348      "pointer-events": "none",
349      "background-image": `linear-gradient(0deg, rgba(255,255,255,0) 0%, rgba(255,255,255,1) 100%)`,
350      "transform": "rotate(180deg) translate(-50%, -50%)",
351      "transform-origin": "0% 0%",
352      "opacity": "0"
353    });
354
355    this.updateGlareSize();
356  }
357
358  updateGlareSize() {
359    if (this.glare) {
360      const glareSize = (this.element.offsetWidth > this.element.offsetHeight ? this.element.offsetWidth : this.element.offsetHeight) * 2;
361
362      Object.assign(this.glareElement.style, {
363        "width": `${glareSize}px`,
364        "height": `${glareSize}px`,
365      });
366    }
367  }
368
369  updateClientSize() {
370    this.clientWidth = window.innerWidth
371      || document.documentElement.clientWidth
372      || document.body.clientWidth;
373
374    this.clientHeight = window.innerHeight
375      || document.documentElement.clientHeight
376      || document.body.clientHeight;
377  }
378
379  onWindowResize() {
380    this.updateGlareSize();
381    this.updateClientSize();
382  }
383
384  setTransition() {
385    clearTimeout(this.transitionTimeout);
386    this.element.style.transition = this.settings.speed + "ms " + this.settings.easing;
387    if (this.glare) this.glareElement.style.transition = `opacity ${this.settings.speed}ms ${this.settings.easing}`;
388
389    this.transitionTimeout = setTimeout(() => {
390      this.element.style.transition = "";
391      if (this.glare) {
392        this.glareElement.style.transition = "";
393      }
394    }, this.settings.speed);
395
396  }
397
398  /**
399   * Method return patched settings of instance
400   * @param {boolean} settings.reverse - reverse the tilt direction
401   * @param {number} settings.max - max tilt rotation (degrees)
402   * @param {startX} settings.startX - the starting tilt on the X axis, in degrees. Default: 0
403   * @param {startY} settings.startY - the starting tilt on the Y axis, in degrees. Default: 0
404   * @param {number} settings.perspective - Transform perspective, the lower the more extreme the tilt gets
405   * @param {string} settings.easing - Easing on enter/exit
406   * @param {number} settings.scale - 2 = 200%, 1.5 = 150%, etc..
407   * @param {number} settings.speed - Speed of the enter/exit transition
408   * @param {boolean} settings.transition - Set a transition on enter/exit
409   * @param {string|null} settings.axis - What axis should be enabled. Can be "x" or "y"
410   * @param {boolean} settings.glare - if it should have a "glare" effect