carousel-angular
Version:
A simple carousel component for Angular 14+ based on 'angular-responsive-carousel' by Ivy Laboratory http://ivylab.space
347 lines • 42 kB
JavaScript
export class Touches {
constructor(properties) {
this.eventType = undefined;
this.handlers = {};
this.startX = 0;
this.startY = 0;
this.lastTap = 0;
this.doubleTapMinTimeout = 300;
this.tapMinTimeout = 200;
this.touchstartTime = 0;
this.i = 0;
this.isMousedown = false;
this._touchListeners = {
touchstart: 'handleTouchstart',
touchmove: 'handleTouchmove',
touchend: 'handleTouchend'
};
this._mouseListeners = {
mousedown: 'handleMousedown',
mousemove: 'handleMousemove',
mouseup: 'handleMouseup',
wheel: 'handleWheel'
};
this._otherListeners = {
resize: 'handleResize'
};
/*
* Listeners
*/
/* Touchstart */
this.handleTouchstart = (event) => {
this.elementPosition = this.getElementPosition();
this.touchstartTime = new Date().getTime();
if (this.eventType === undefined) {
this.getTouchstartPosition(event);
}
this.runHandler('touchstart', event);
};
/* Touchmove */
this.handleTouchmove = (event) => {
const { touches } = event;
// Pan
if (this.detectPan(touches)) {
this.runHandler('pan', event);
}
// Pinch
if (this.detectPinch(event)) {
this.runHandler('pinch', event);
}
// Linear swipe
switch (this.detectLinearSwipe(event)) {
case 'horizontal-swipe':
event.swipeType = 'horizontal-swipe';
this.runHandler('horizontal-swipe', event);
break;
case 'vertical-swipe':
event.swipeType = 'vertical-swipe';
this.runHandler('vertical-swipe', event);
break;
}
// Linear swipe
if (this.detectLinearSwipe(event) ||
this.eventType === 'horizontal-swipe' ||
this.eventType === 'vertical-swipe') {
this.handleLinearSwipe(event);
}
};
/* Touchend */
this.handleTouchend = (event) => {
const { touches } = event;
// Double Tap
if (this.detectDoubleTap()) {
this.runHandler('double-tap', event);
}
// Tap
this.detectTap();
this.runHandler('touchend', event);
this.eventType = 'touchend';
if (touches && touches.length === 0) {
this.eventType = undefined;
this.i = 0;
}
};
/* Mousedown */
this.handleMousedown = (event) => {
this.isMousedown = true;
this.elementPosition = this.getElementPosition();
this.touchstartTime = new Date().getTime();
if (this.eventType === undefined) {
this.getMousedownPosition(event);
}
this.runHandler('mousedown', event);
};
/* Mousemove */
this.handleMousemove = (event) => {
// event.preventDefault();
if (!this.isMousedown) {
return;
}
// Pan
this.runHandler('pan', event);
// Linear swipe
switch (this.detectLinearSwipe(event)) {
case 'horizontal-swipe':
event.swipeType = 'horizontal-swipe';
this.runHandler('horizontal-swipe', event);
break;
case 'vertical-swipe':
event.swipeType = 'vertical-swipe';
this.runHandler('vertical-swipe', event);
break;
}
// Linear swipe
if (this.detectLinearSwipe(event) ||
this.eventType === 'horizontal-swipe' ||
this.eventType === 'vertical-swipe') {
this.handleLinearSwipe(event);
}
};
/* Mouseup */
this.handleMouseup = (event) => {
// Tap
this.detectTap();
this.isMousedown = false;
this.runHandler('mouseup', event);
this.eventType = undefined;
this.i = 0;
};
/* Wheel */
this.handleWheel = (event) => {
this.runHandler('wheel', event);
};
/* Resize */
this.handleResize = (event) => {
this.runHandler('resize', event);
};
this.properties = properties;
this.element = this.properties.element;
this.elementPosition = this.getElementPosition();
this.toggleEventListeners('addEventListener');
}
get touchListeners() {
return this.properties.touchListeners
? this.properties.touchListeners
: this._touchListeners;
}
get mouseListeners() {
return this.properties.mouseListeners
? this.properties.mouseListeners
: this._mouseListeners;
}
get otherListeners() {
return this.properties.otherListeners
? this.properties.otherListeners
: this._otherListeners;
}
destroy() {
this.toggleEventListeners('removeEventListener');
}
toggleEventListeners(action) {
let listeners;
if (this.properties.listeners === 'mouse and touch') {
listeners = Object.assign(this.touchListeners, this.mouseListeners);
}
else {
listeners = this.detectTouchScreen()
? this.touchListeners
: this.mouseListeners;
}
if (this.properties.resize) {
listeners = Object.assign(listeners, this.otherListeners);
}
for (const listener in listeners) {
const handler = listeners[listener];
// Window
if (listener === 'resize') {
if (action === 'addEventListener') {
window.addEventListener(listener, this[handler], false);
}
if (action === 'removeEventListener') {
window.removeEventListener(listener, this[handler], false);
}
// Document
}
else if (listener === 'mouseup' || listener === 'mousemove') {
if (action === 'addEventListener') {
document.addEventListener(listener, this[handler], {
passive: false
});
}
if (action === 'removeEventListener') {
document.removeEventListener(listener, this[handler], false);
}
// Element
}
else {
if (action === 'addEventListener') {
this.element.addEventListener(listener, this[handler], false);
}
if (action === 'removeEventListener') {
this.element.removeEventListener(listener, this[handler], false);
}
}
}
}
addEventListeners(listener) {
const handler = this._mouseListeners[listener];
window.addEventListener(listener, this[handler], false);
}
removeEventListeners(listener) {
const handler = this._mouseListeners[listener];
window.removeEventListener(listener, this[handler], false);
}
handleLinearSwipe(event) {
// event.preventDefault();
this.i++;
if (this.i > 3) {
this.eventType = this.getLinearSwipeType(event);
}
if (this.eventType === 'horizontal-swipe') {
this.runHandler('horizontal-swipe', event);
}
if (this.eventType === 'vertical-swipe') {
this.runHandler('vertical-swipe', event);
}
}
runHandler(eventName, response) {
if (this.handlers[eventName]) {
this.handlers[eventName](response);
}
}
/*
* Detection
*/
detectPan(touches) {
return ((touches.length === 1 && !this.eventType) || this.eventType === 'pan');
}
detectDoubleTap() {
if (this.eventType != undefined) {
return;
}
const currentTime = new Date().getTime();
const tapLength = currentTime - this.lastTap;
clearTimeout(this.doubleTapTimeout);
if (tapLength < this.doubleTapMinTimeout && tapLength > 0) {
return true;
}
this.doubleTapTimeout = setTimeout(() => {
clearTimeout(this.doubleTapTimeout);
}, this.doubleTapMinTimeout);
this.lastTap = currentTime;
return undefined;
}
detectTap() {
if (this.eventType != undefined) {
return;
}
const currentTime = new Date().getTime();
const tapLength = currentTime - this.touchstartTime;
if (tapLength > 0) {
if (tapLength < this.tapMinTimeout) {
this.runHandler('tap', event);
}
else {
this.runHandler('longtap', event);
}
}
}
detectPinch(event) {
const { touches } = event;
return ((touches.length === 2 && this.eventType === undefined) ||
this.eventType === 'pinch');
}
detectLinearSwipe(event) {
const { touches } = event;
if (touches) {
if ((touches.length === 1 && !this.eventType) ||
this.eventType === 'horizontal-swipe' ||
this.eventType === 'vertical-swipe') {
return this.getLinearSwipeType(event);
}
}
else if (!this.eventType ||
this.eventType === 'horizontal-swipe' ||
this.eventType === 'vertical-swipe') {
return this.getLinearSwipeType(event);
}
return undefined;
}
getLinearSwipeType(event) {
if (this.eventType !== 'horizontal-swipe' &&
this.eventType !== 'vertical-swipe') {
const movementX = Math.abs(this.moveLeft(0, event) - this.startX);
const movementY = Math.abs(this.moveTop(0, event) - this.startY);
if (movementY * 3 > movementX) {
return 'vertical-swipe';
}
return 'horizontal-swipe';
}
return this.eventType;
}
getElementPosition() {
return this.element.getBoundingClientRect();
}
getTouchstartPosition(event) {
this.startX = event.touches[0].clientX - this.elementPosition.left;
this.startY = event.touches[0].clientY - this.elementPosition.top;
}
getMousedownPosition(event) {
this.startX = event.clientX - this.elementPosition.left;
this.startY = event.clientY - this.elementPosition.top;
}
moveLeft(index, event) {
const { touches } = event;
if (touches) {
return touches[index].clientX - this.elementPosition.left;
}
return event.clientX - this.elementPosition.left;
}
moveTop(index, event) {
const { touches } = event;
if (touches) {
return touches[index].clientY - this.elementPosition.top;
}
return event.clientY - this.elementPosition.top;
}
detectTouchScreen() {
const prefixes = ' -webkit- -moz- -o- -ms- '.split(' ');
const mq = function (query) {
return window.matchMedia(query).matches;
};
if ('ontouchstart' in window) {
return true;
}
// include the 'heartz' as a way to have a non matching MQ to help terminate the join
// https://git.io/vznFH
const query = ['(', prefixes.join('touch-enabled),('), 'heartz', ')'].join('');
return mq(query);
}
/* Public properties and methods */
on(event, handler) {
if (event) {
this.handlers[event] = handler;
}
}
}
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interface Properties {\n  element: HTMLElement;\n  listeners?: 'auto' | 'mouse and touch';\n  touchListeners?: any;\n  mouseListeners?: any;\n  otherListeners?: any;\n  resize?: boolean;\n}\n\nexport type EventType =\n  | undefined\n  | 'touchend'\n  | 'pan'\n  | 'pinch'\n  | 'horizontal-swipe'\n  | 'vertical-swipe'\n  | 'tap'\n  | 'longtap';\nexport type TouchHandler =\n  | 'handleTouchstart'\n  | 'handleTouchmove'\n  | 'handleTouchend';\nexport type MouseHandler =\n  | 'handleMousedown'\n  | 'handleMousemove'\n  | 'handleMouseup';\n\nexport class Touches {\n  properties: Properties;\n\n  element: HTMLElement;\n\n  elementPosition: ClientRect;\n\n  eventType: EventType = undefined;\n\n  handlers: any = {};\n\n  startX = 0;\n\n  startY = 0;\n\n  lastTap = 0;\n\n  doubleTapTimeout: any;\n\n  doubleTapMinTimeout = 300;\n\n  tapMinTimeout = 200;\n\n  touchstartTime = 0;\n\n  i = 0;\n\n  isMousedown = false;\n\n  _touchListeners: any = {\n    touchstart: 'handleTouchstart',\n    touchmove: 'handleTouchmove',\n    touchend: 'handleTouchend'\n  };\n\n  _mouseListeners: any = {\n    mousedown: 'handleMousedown',\n    mousemove: 'handleMousemove',\n    mouseup: 'handleMouseup',\n    wheel: 'handleWheel'\n  };\n\n  _otherListeners: any = {\n    resize: 'handleResize'\n  };\n\n  get touchListeners() {\n    return this.properties.touchListeners\n      ? this.properties.touchListeners\n      : this._touchListeners;\n  }\n\n  get mouseListeners() {\n    return this.properties.mouseListeners\n      ? this.properties.mouseListeners\n      : this._mouseListeners;\n  }\n\n  get otherListeners() {\n    return this.properties.otherListeners\n      ? this.properties.otherListeners\n      : this._otherListeners;\n  }\n\n  constructor(properties: Properties) {\n    this.properties = properties;\n    this.element = this.properties.element;\n    this.elementPosition = this.getElementPosition();\n\n    this.toggleEventListeners('addEventListener');\n  }\n\n  destroy() {\n    this.toggleEventListeners('removeEventListener');\n  }\n\n  toggleEventListeners(action: 'addEventListener' | 'removeEventListener') {\n    let listeners;\n\n    if (this.properties.listeners === 'mouse and touch') {\n      listeners = Object.assign(this.touchListeners, this.mouseListeners);\n    } else {\n      listeners = this.detectTouchScreen()\n        ? this.touchListeners\n        : this.mouseListeners;\n    }\n\n    if (this.properties.resize) {\n      listeners = Object.assign(listeners, this.otherListeners);\n    }\n\n    for (const listener in listeners) {\n      const handler: MouseHandler = listeners[listener];\n\n      // Window\n      if (listener === 'resize') {\n        if (action === 'addEventListener') {\n          window.addEventListener(listener, this[handler], false);\n        }\n        if (action === 'removeEventListener') {\n          window.removeEventListener(listener, this[handler], false);\n        }\n        // Document\n      } else if (listener === 'mouseup' || listener === 'mousemove') {\n        if (action === 'addEventListener') {\n          document.addEventListener(listener, this[handler], {\n            passive: false\n          });\n        }\n        if (action === 'removeEventListener') {\n          document.removeEventListener(listener, this[handler], false);\n        }\n        // Element\n      } else {\n        if (action === 'addEventListener') {\n          this.element.addEventListener(listener, this[handler], false);\n        }\n        if (action === 'removeEventListener') {\n          this.element.removeEventListener(listener, this[handler], false);\n        }\n      }\n    }\n  }\n\n  addEventListeners(listener: string) {\n    const handler: MouseHandler = this._mouseListeners[listener];\n    window.addEventListener(listener, this[handler], false);\n  }\n\n  removeEventListeners(listener: string) {\n    const handler: MouseHandler = this._mouseListeners[listener];\n    window.removeEventListener(listener, this[handler], false);\n  }\n\n  /*\n   * Listeners\n   */\n\n  /* Touchstart */\n\n  handleTouchstart = (event: any) => {\n    this.elementPosition = this.getElementPosition();\n    this.touchstartTime = new Date().getTime();\n\n    if (this.eventType === undefined) {\n      this.getTouchstartPosition(event);\n    }\n\n    this.runHandler('touchstart', event);\n  };\n\n  /* Touchmove */\n\n  handleTouchmove = (event: any) => {\n    const { touches } = event;\n\n    // Pan\n    if (this.detectPan(touches)) {\n      this.runHandler('pan', event);\n    }\n\n    // Pinch\n    if (this.detectPinch(event)) {\n      this.runHandler('pinch', event);\n    }\n\n    // Linear swipe\n    switch (this.detectLinearSwipe(event)) {\n      case 'horizontal-swipe':\n        event.swipeType = 'horizontal-swipe';\n        this.runHandler('horizontal-swipe', event);\n        break;\n      case 'vertical-swipe':\n        event.swipeType = 'vertical-swipe';\n        this.runHandler('vertical-swipe', event);\n        break;\n    }\n\n    // Linear swipe\n    if (\n      this.detectLinearSwipe(event) ||\n      this.eventType === 'horizontal-swipe' ||\n      this.eventType === 'vertical-swipe'\n    ) {\n      this.handleLinearSwipe(event);\n    }\n  };\n\n  handleLinearSwipe(event: any) {\n    // event.preventDefault();\n\n    this.i++;\n\n    if (this.i > 3) {\n      this.eventType = this.getLinearSwipeType(event);\n    }\n\n    if (this.eventType === 'horizontal-swipe') {\n      this.runHandler('horizontal-swipe', event);\n    }\n\n    if (this.eventType === 'vertical-swipe') {\n      this.runHandler('vertical-swipe', event);\n    }\n  }\n\n  /* Touchend */\n\n  handleTouchend = (event: any) => {\n    const { touches } = event;\n\n    // Double Tap\n    if (this.detectDoubleTap()) {\n      this.runHandler('double-tap', event);\n    }\n\n    // Tap\n    this.detectTap();\n\n    this.runHandler('touchend', event);\n    this.eventType = 'touchend';\n\n    if (touches && touches.length === 0) {\n      this.eventType = undefined;\n      this.i = 0;\n    }\n  };\n\n  /* Mousedown */\n\n  handleMousedown = (event: any) => {\n    this.isMousedown = true;\n    this.elementPosition = this.getElementPosition();\n    this.touchstartTime = new Date().getTime();\n\n    if (this.eventType === undefined) {\n      this.getMousedownPosition(event);\n    }\n\n    this.runHandler('mousedown', event);\n  };\n\n  /* Mousemove */\n\n  handleMousemove = (event: any) => {\n    // event.preventDefault();\n\n    if (!this.isMousedown) {\n      return;\n    }\n\n    // Pan\n    this.runHandler('pan', event);\n\n    // Linear swipe\n    switch (this.detectLinearSwipe(event)) {\n      case 'horizontal-swipe':\n        event.swipeType = 'horizontal-swipe';\n        this.runHandler('horizontal-swipe', event);\n        break;\n      case 'vertical-swipe':\n        event.swipeType = 'vertical-swipe';\n        this.runHandler('vertical-swipe', event);\n        break;\n    }\n\n    // Linear swipe\n    if (\n      this.detectLinearSwipe(event) ||\n      this.eventType === 'horizontal-swipe' ||\n      this.eventType === 'vertical-swipe'\n    ) {\n      this.handleLinearSwipe(event);\n    }\n  };\n\n  /* Mouseup */\n\n  handleMouseup = (event: any) => {\n    // Tap\n    this.detectTap();\n\n    this.isMousedown = false;\n    this.runHandler('mouseup', event);\n    this.eventType = undefined;\n    this.i = 0;\n  };\n\n  /* Wheel */\n\n  handleWheel = (event: any) => {\n    this.runHandler('wheel', event);\n  };\n\n  /* Resize */\n\n  handleResize = (event: any) => {\n    this.runHandler('resize', event);\n  };\n\n  runHandler(eventName: any, response: any) {\n    if (this.handlers[eventName]) {\n      this.handlers[eventName](response);\n    }\n  }\n\n  /*\n   * Detection\n   */\n\n  detectPan(touches: any) {\n    return (\n      (touches.length === 1 && !this.eventType) || this.eventType === 'pan'\n    );\n  }\n\n  detectDoubleTap() {\n    if (this.eventType != undefined) {\n      return;\n    }\n\n    const currentTime = new Date().getTime();\n    const tapLength = currentTime - this.lastTap;\n\n    clearTimeout(this.doubleTapTimeout);\n\n    if (tapLength < this.doubleTapMinTimeout && tapLength > 0) {\n      return true;\n    }\n    this.doubleTapTimeout = setTimeout(() => {\n      clearTimeout(this.doubleTapTimeout);\n    }, this.doubleTapMinTimeout);\n\n    this.lastTap = currentTime;\n\n    return undefined;\n  }\n\n  detectTap(): void {\n    if (this.eventType != undefined) {\n      return;\n    }\n\n    const currentTime = new Date().getTime();\n    const tapLength = currentTime - this.touchstartTime;\n\n    if (tapLength > 0) {\n      if (tapLength < this.tapMinTimeout) {\n        this.runHandler('tap', event);\n      } else {\n        this.runHandler('longtap', event);\n      }\n    }\n  }\n\n  detectPinch(event: any) {\n    const { touches } = event;\n    return (\n      (touches.length === 2 && this.eventType === undefined) ||\n      this.eventType === 'pinch'\n    );\n  }\n\n  detectLinearSwipe(event: any) {\n    const { touches } = event;\n\n    if (touches) {\n      if (\n        (touches.length === 1 && !this.eventType) ||\n        this.eventType === 'horizontal-swipe' ||\n        this.eventType === 'vertical-swipe'\n      ) {\n        return this.getLinearSwipeType(event);\n      }\n    } else if (\n      !this.eventType ||\n      this.eventType === 'horizontal-swipe' ||\n      this.eventType === 'vertical-swipe'\n    ) {\n      return this.getLinearSwipeType(event);\n    }\n\n    return undefined;\n  }\n\n  getLinearSwipeType(event: any) {\n    if (\n      this.eventType !== 'horizontal-swipe' &&\n      this.eventType !== 'vertical-swipe'\n    ) {\n      const movementX = Math.abs(this.moveLeft(0, event) - this.startX);\n      const movementY = Math.abs(this.moveTop(0, event) - this.startY);\n\n      if (movementY * 3 > movementX) {\n        return 'vertical-swipe';\n      }\n      return 'horizontal-swipe';\n    }\n    return this.eventType;\n  }\n\n  getElementPosition() {\n    return this.element.getBoundingClientRect();\n  }\n\n  getTouchstartPosition(event: any) {\n    this.startX = event.touches[0].clientX - this.elementPosition.left;\n    this.startY = event.touches[0].clientY - this.elementPosition.top;\n  }\n\n  getMousedownPosition(event: any) {\n    this.startX = event.clientX - this.elementPosition.left;\n    this.startY = event.clientY - this.elementPosition.top;\n  }\n\n  moveLeft(index: any, event: any) {\n    const { touches } = event;\n\n    if (touches) {\n      return touches[index].clientX - this.elementPosition.left;\n    }\n    return event.clientX - this.elementPosition.left;\n  }\n\n  moveTop(index: any, event: any) {\n    const { touches } = event;\n\n    if (touches) {\n      return touches[index].clientY - this.elementPosition.top;\n    }\n    return event.clientY - this.elementPosition.top;\n  }\n\n  detectTouchScreen() {\n    const prefixes = ' -webkit- -moz- -o- -ms- '.split(' ');\n    const mq = function (query: any) {\n      return window.matchMedia(query).matches;\n    };\n\n    if ('ontouchstart' in window) {\n      return true;\n    }\n\n    // include the 'heartz' as a way to have a non matching MQ to help terminate the join\n    // https://git.io/vznFH\n    const query = ['(', prefixes.join('touch-enabled),('), 'heartz', ')'].join(\n      ''\n    );\n    return mq(query);\n  }\n\n  /* Public properties and methods */\n  on(event: EventType, handler: Function) {\n    if (event) {\n      this.handlers[event] = handler;\n    }\n  }\n}\n"]}