reactronic-dom
Version:
Reactronic DOM - Transactional Reactive Front-End Development Framework
73 lines (72 loc) • 2.87 kB
JavaScript
var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
return c > 3 && r && Object.defineProperty(target, key, r), r;
};
var __metadata = (this && this.__metadata) || function (k, v) {
if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
};
import { options, transaction, LoggingLevel } from 'reactronic';
import { Sensor } from './Sensor';
export class ResizeSensor extends Sensor {
constructor() {
super();
this.resizedElements = [];
this.observer = new ResizeObserver(this.onResize.bind(this));
}
reset() {
this.doReset();
}
observeResizing(node, value, boxSizing = 'content-box') {
const native = node.element;
if (native instanceof Element) {
if (value) {
if (native.resizeObserver !== undefined && native.resizeObserver !== this.observer)
native.resizeObserver.unobserve(native);
native.resizeObserver = this.observer;
this.observer.observe(native, { box: boxSizing });
}
else {
if (native.resizeObserver === this.observer) {
this.observer.unobserve(native);
native.resizeObserver = undefined;
}
}
}
else
throw new Error('cannot observe resizing of non-HTML node');
}
onResize(entries) {
this.resize(entries);
this.reset();
}
resize(entries) {
this.revision++;
this.resizedElements = entries.map(entry => {
const element = entry.target;
return {
borderBoxSize: entry.borderBoxSize,
contentBoxSize: entry.contentBoxSize,
contentRect: entry.contentRect,
resizeData: element.dataForSensor.resize,
};
});
}
doReset() {
this.resizedElements = [];
}
}
__decorate([
transaction,
__metadata("design:type", Function),
__metadata("design:paramtypes", []),
__metadata("design:returntype", void 0)
], ResizeSensor.prototype, "reset", null);
__decorate([
transaction,
options({ logging: LoggingLevel.Off }),
__metadata("design:type", Function),
__metadata("design:paramtypes", [Array]),
__metadata("design:returntype", void 0)
], ResizeSensor.prototype, "resize", null);