react-native-gesture-handler/lib/module/web/tools/GestureHandlerWebDelegate.js

Experimental implementation of a new declarative API for gesture handling in react-native

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

import { findNodeHandle } from 'react-native';
import PointerEventManager from './PointerEventManager';
import TouchEventManager from './TouchEventManager';
import { State } from '../../State';
import { isPointerInBounds } from '../utils';
import { MouseButton } from '../../handlers/gestureHandlerCommon';
export class GestureHandlerWebDelegate {
  constructor() {
    _defineProperty(this, "view", void 0);

    _defineProperty(this, "gestureHandler", void 0);

    _defineProperty(this, "eventManagers", []);
  }

  getView() {
    return this.view;
  }

  init(viewRef, handler) {
    var _config$userSelect, _config$userSelect2, _config$touchAction;

    if (!viewRef) {
      throw new Error(`Cannot find HTML Element for handler ${handler.getTag()}`);
    }

    this.gestureHandler = handler;
    this.view = findNodeHandle(viewRef);
    const config = handler.getConfig();
    this.addContextMenuListeners(config);
    this.view.style['userSelect'] = (_config$userSelect = config.userSelect) !== null && _config$userSelect !== void 0 ? _config$userSelect : 'none';
    this.view.style['webkitUserSelect'] = (_config$userSelect2 = config.userSelect) !== null && _config$userSelect2 !== void 0 ? _config$userSelect2 : 'none';
    this.view.style['touchAction'] = (_config$touchAction = config.touchAction) !== null && _config$touchAction !== void 0 ? _config$touchAction : 'none'; // @ts-ignore This one disables default events on Safari

    this.view.style['WebkitTouchCallout'] = 'none';
    this.eventManagers.push(new PointerEventManager(this.view));
    this.eventManagers.push(new TouchEventManager(this.view));
    this.eventManagers.forEach(manager => this.gestureHandler.attachEventManager(manager));
  }

  isPointerInBounds({
    x,
    y
  }) {
    return isPointerInBounds(this.view, {
      x,
      y
    });
  }

  measureView() {
    const rect = this.view.getBoundingClientRect();
    return {
      pageX: rect.left,
      pageY: rect.top,
      width: rect.width,
      height: rect.height
    };
  }

  reset() {
    this.eventManagers.forEach(manager => manager.resetManager());
  }

  tryResetCursor() {
    const config = this.gestureHandler.getConfig();

    if (config.activeCursor && config.activeCursor !== 'auto' && this.gestureHandler.getState() === State.ACTIVE) {
      this.view.style.cursor = 'auto';
    }
  }

  shouldDisableContextMenu(config) {
    return config.enableContextMenu === undefined && this.gestureHandler.isButtonInConfig(MouseButton.RIGHT) || config.enableContextMenu === false;
  }

  addContextMenuListeners(config) {
    if (this.shouldDisableContextMenu(config)) {
      this.view.addEventListener('contextmenu', this.disableContextMenu);
    } else if (config.enableContextMenu) {
      this.view.addEventListener('contextmenu', this.enableContextMenu);
    }
  }

  removeContextMenuListeners(config) {
    if (this.shouldDisableContextMenu(config)) {
      this.view.removeEventListener('contextmenu', this.disableContextMenu);
    } else if (config.enableContextMenu) {
      this.view.removeEventListener('contextmenu', this.enableContextMenu);
    }
  }

  disableContextMenu(e) {
    e.preventDefault();
  }

  enableContextMenu(e) {
    e.stopPropagation();
  }

  onBegin() {// no-op for now
  }

  onActivate() {
    const config = this.gestureHandler.getConfig();

    if ((!this.view.style.cursor || this.view.style.cursor === 'auto') && config.activeCursor) {
      this.view.style.cursor = config.activeCursor;
    }
  }

  onEnd() {
    this.tryResetCursor();
  }

  onCancel() {
    this.tryResetCursor();
  }

  onFail() {
    this.tryResetCursor();
  }

  destroy(config) {
    this.removeContextMenuListeners(config);
    this.eventManagers.forEach(manager => {
      manager.unregisterListeners();
    });
  }

}
//# sourceMappingURL=GestureHandlerWebDelegate.js.map