@atlaskit/editor-common
Version:
A package that contains common classes and components for editor and renderer
82 lines • 3.6 kB
JavaScript
import _classCallCheck from "@babel/runtime/helpers/classCallCheck";
import _createClass from "@babel/runtime/helpers/createClass";
import _defineProperty from "@babel/runtime/helpers/defineProperty";
export var ShadowKeys = /*#__PURE__*/function (ShadowKeys) {
ShadowKeys["SHOW_LEFT_SHADOW"] = "showLeftShadow";
ShadowKeys["SHOW_RIGHT_SHADOW"] = "showRightShadow";
return ShadowKeys;
}({});
export var shadowObserverClassNames = {
SENTINEL_LEFT: 'sentinel-left',
SENTINEL_RIGHT: 'sentinel-right',
SHADOW_CONTAINER: 'with-shadow-observer'
};
var requestIdleCallback = function requestIdleCallback(fn) {
// Ignored via go/ees005
// eslint-disable-next-line @typescript-eslint/no-explicit-any
return window.requestIdleCallback ?
// Ignored via go/ees005
// eslint-disable-next-line @typescript-eslint/no-explicit-any
window.requestIdleCallback(fn) : window.requestAnimationFrame(fn);
};
var cancelIdleCallback = function cancelIdleCallback(id) {
// Ignored via go/ees005
// eslint-disable-next-line @typescript-eslint/no-explicit-any
return window.cancelIdleCallback ?
// Ignored via go/ees005
// eslint-disable-next-line @typescript-eslint/no-explicit-any
window.cancelIdleCallback(id) : window.cancelAnimationFrame(id);
};
export var ShadowObserver = /*#__PURE__*/function () {
function ShadowObserver(_ref) {
var _this = this;
var scrollContainer = _ref.scrollContainer,
onUpdateShadows = _ref.onUpdateShadows;
_classCallCheck(this, ShadowObserver);
_defineProperty(this, "sentinels", {});
_defineProperty(this, "shadowStates", _defineProperty(_defineProperty({}, ShadowKeys.SHOW_LEFT_SHADOW, false), ShadowKeys.SHOW_RIGHT_SHADOW, false));
_defineProperty(this, "init", function () {
if (!_this.scrollContainer || _this.intersectionObserver) {
return;
}
_this.sentinels.right = document.createElement('div');
_this.sentinels.right.classList.add(shadowObserverClassNames.SENTINEL_RIGHT);
_this.scrollContainer.appendChild(_this.sentinels.right);
_this.sentinels.left = document.createElement('div');
_this.sentinels.left.classList.add(shadowObserverClassNames.SENTINEL_LEFT);
_this.scrollContainer.prepend(_this.sentinels.left);
_this.intersectionObserver = new IntersectionObserver(function (entries, _) {
entries.forEach(_this.onIntersect);
}, {
root: _this.scrollContainer,
rootMargin: '1px'
});
_this.intersectionObserver.observe(_this.sentinels.left);
_this.intersectionObserver.observe(_this.sentinels.right);
});
_defineProperty(this, "onIntersect", function (entry) {
_this.requestCallbackId = requestIdleCallback(function () {
if (entry.target.classList.contains(shadowObserverClassNames.SENTINEL_LEFT)) {
_this.shadowStates[ShadowKeys.SHOW_LEFT_SHADOW] = !entry.isIntersecting;
}
if (entry.target.classList.contains(shadowObserverClassNames.SENTINEL_RIGHT)) {
_this.shadowStates[ShadowKeys.SHOW_RIGHT_SHADOW] = !entry.isIntersecting;
}
_this.onUpdateShadows(_this.shadowStates);
});
});
this.scrollContainer = scrollContainer;
this.onUpdateShadows = onUpdateShadows;
this.init();
}
return _createClass(ShadowObserver, [{
key: "dispose",
value: function dispose() {
if (this.intersectionObserver) {
this.intersectionObserver.disconnect();
this.intersectionObserver = undefined;
this.requestCallbackId && cancelIdleCallback(this.requestCallbackId);
}
}
}]);
}();