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/**
* Remove an element from the dom
*
* @category Manipulation
* @param elem The element to be removed
*/
export function removeElement(elem) {
if (elem.prev)
elem.prev.next = elem.next;
if (elem.next)
elem.next.prev = elem.prev;
if (elem.parent) {
const childs = elem.parent.children;
childs.splice(childs.lastIndexOf(elem), 1);
}
}
/**
* Replace an element in the dom
*
* @category Manipulation
* @param elem The element to be replaced
* @param replacement The element to be added
*/
export function replaceElement(elem, replacement) {
const prev = (replacement.prev = elem.prev);
if (prev) {
prev.next = replacement;
}
const next = (replacement.next = elem.next);
if (next) {
next.prev = replacement;
}
const parent = (replacement.parent = elem.parent);
if (parent) {
const childs = parent.children;
childs[childs.lastIndexOf(elem)] = replacement;
elem.parent = null;
}
}
/**
* Append a child to an element.
*
* @category Manipulation
* @param elem The element to append to.
* @param child The element to be added as a child.
*/
export function appendChild(elem, child) {
removeElement(child);
child.next = null;
child.parent = elem;
if (elem.children.push(child) > 1) {
const sibling = elem.children[elem.children.length - 2];
sibling.next = child;
child.prev = sibling;
}
else {
child.prev = null;
}
}
/**
* Append an element after another.
*
* @category Manipulation
* @param elem The element to append after.
* @param next The element be added.
*/
export function append(elem, next) {
removeElement(next);
const { parent } = elem;
const currNext = elem.next;
next.next = currNext;
next.prev = elem;
elem.next = next;
next.parent = parent;
if (currNext) {
currNext.prev = next;
if (parent) {
const childs = parent.children;
childs.splice(childs.lastIndexOf(currNext), 0, next);
}
}
else if (parent) {
parent.children.push(next);
}
}
/**
* Prepend a child to an element.
*
* @category Manipulation
* @param elem The element to prepend before.
* @param child The element to be added as a child.
*/
export function prependChild(elem, child) {
removeElement(child);
child.parent = elem;
child.prev = null;
if (elem.children.unshift(child) !== 1) {
const sibling = elem.children[1];
sibling.prev = child;
child.next = sibling;
}
else {
child.next = null;
}
}
/**
* Prepend an element before another.
*
* @category Manipulation
* @param elem The element to prepend before.
* @param prev The element be added.
*/
export function prepend(elem, prev) {
removeElement(prev);
const { parent } = elem;
if (parent) {
const childs = parent.children;
childs.splice(childs.indexOf(elem), 0, prev);
}
if (elem.prev) {
elem.prev.next = prev;
}
prev.parent = parent;
prev.prev = elem.prev;
prev.next = elem;
elem.prev = prev;
}
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