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import Position from './position';
export default class Element {
constructor(node) {
this.element = node;
this.document = document;
}
// Gets the screen co-ordinates for the current dom element
getScreenCoordinates() {
let tempNode = this.element;
let x = this.document.documentElement.offsetLeft;
let y = this.document.documentElement.offsetTop;
if (tempNode.offsetParent) {
do {
x += tempNode.offsetLeft;
y += tempNode.offsetTop;
} while (tempNode = tempNode.offsetParent);
}
return { x, y };
}
// Gets the calculated position on screen
getPosition() {
const coordinates = this.getScreenCoordinates();
const position = new Position({
left: Number.MAX_VALUE,
top: Number.MAX_VALUE,
right: 0,
bottom: 0,
});
// If we have the position for this element
// and the element is visible on screen (has some height)
if (typeof coordinates.x === 'number' && typeof coordinates.y === 'number' && (this.element.offsetWidth > 0 || this.element.offsetHeight > 0)) {
position.left = Math.min(position.left, coordinates.x);
position.top = Math.min(position.top, coordinates.y);
position.right = Math.max(position.right, coordinates.x + this.element.offsetWidth);
position.bottom = Math.max(position.bottom, coordinates.y + this.element.offsetHeight);
}
return position;
}
}
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