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