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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.prevElementSibling = exports.nextElementSibling = exports.getName = exports.hasAttrib = exports.getAttributeValue = exports.getSiblings = exports.getParent = exports.getChildren = void 0;
var domhandler_1 = require("domhandler");
var emptyArray = [];
/**
* Get a node's children.
*
* @param elem Node to get the children of.
* @returns `elem`'s children, or an empty array.
*/
function getChildren(elem) {
var _a;
return (_a = elem.children) !== null && _a !== void 0 ? _a : emptyArray;
}
exports.getChildren = getChildren;
/**
* Get a node's parent.
*
* @param elem Node to get the parent of.
* @returns `elem`'s parent node.
*/
function getParent(elem) {
return elem.parent || null;
}
exports.getParent = getParent;
/**
* Gets an elements siblings, including the element itself.
*
* Attempts to get the children through the element's parent first.
* If we don't have a parent (the element is a root node),
* we walk the element's `prev` & `next` to get all remaining nodes.
*
* @param elem Element to get the siblings of.
* @returns `elem`'s siblings.
*/
function getSiblings(elem) {
var _a, _b;
var parent = getParent(elem);
if (parent != null)
return getChildren(parent);
var siblings = [elem];
var prev = elem.prev, next = elem.next;
while (prev != null) {
siblings.unshift(prev);
(_a = prev, prev = _a.prev);
}
while (next != null) {
siblings.push(next);
(_b = next, next = _b.next);
}
return siblings;
}
exports.getSiblings = getSiblings;
/**
* Gets an attribute from an element.
*
* @param elem Element to check.
* @param name Attribute name to retrieve.
* @returns The element's attribute value, or `undefined`.
*/
function getAttributeValue(elem, name) {
var _a;
return (_a = elem.attribs) === null || _a === void 0 ? void 0 : _a[name];
}
exports.getAttributeValue = getAttributeValue;
/**
* Checks whether an element has an attribute.
*
* @param elem Element to check.
* @param name Attribute name to look for.
* @returns Returns whether `elem` has the attribute `name`.
*/
function hasAttrib(elem, name) {
return (elem.attribs != null &&
Object.prototype.hasOwnProperty.call(elem.attribs, name) &&
elem.attribs[name] != null);
}
exports.hasAttrib = hasAttrib;
/**
* Get the tag name of an element.
*
* @param elem The element to get the name for.
* @returns The tag name of `elem`.
*/
function getName(elem) {
return elem.name;
}
exports.getName = getName;
/**
* Returns the next element sibling of a node.
*
* @param elem The element to get the next sibling of.
* @returns `elem`'s next sibling that is a tag.
*/
function nextElementSibling(elem) {
var _a;
var next = elem.next;
while (next !== null && !(0, domhandler_1.isTag)(next))
(_a = next, next = _a.next);
return next;
}
exports.nextElementSibling = nextElementSibling;
/**
* Returns the previous element sibling of a node.
*
* @param elem The element to get the previous sibling of.
* @returns `elem`'s previous sibling that is a tag.
*/
function prevElementSibling(elem) {
var _a;
var prev = elem.prev;
while (prev !== null && !(0, domhandler_1.isTag)(prev))
(_a = prev, prev = _a.prev);
return prev;
}
exports.prevElementSibling = prevElementSibling;