Current File : //www/specpages-backup/node_modules/cheerio/lib/utils.js
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.isHtml = exports.cloneDom = exports.domEach = exports.cssCase = exports.camelCase = exports.isCheerio = exports.isTag = void 0;
var domhandler_1 = require("domhandler");
/**
* Check if the DOM element is a tag.
*
* `isTag(type)` includes `<script>` and `<style>` tags.
*
* @private
* @category Utils
* @param type - The DOM node to check.
* @returns Whether the node is a tag.
*/
var domhandler_2 = require("domhandler");
Object.defineProperty(exports, "isTag", { enumerable: true, get: function () { return domhandler_2.isTag; } });
/**
* Checks if an object is a Cheerio instance.
*
* @category Utils
* @param maybeCheerio - The object to check.
* @returns Whether the object is a Cheerio instance.
*/
function isCheerio(maybeCheerio) {
return maybeCheerio.cheerio != null;
}
exports.isCheerio = isCheerio;
/**
* Convert a string to camel case notation.
*
* @private
* @category Utils
* @param str - The string to be converted.
* @returns String in camel case notation.
*/
function camelCase(str) {
return str.replace(/[_.-](\w|$)/g, function (_, x) { return x.toUpperCase(); });
}
exports.camelCase = camelCase;
/**
* Convert a string from camel case to "CSS case", where word boundaries are
* described by hyphens ("-") and all characters are lower-case.
*
* @private
* @category Utils
* @param str - The string to be converted.
* @returns String in "CSS case".
*/
function cssCase(str) {
return str.replace(/[A-Z]/g, '-$&').toLowerCase();
}
exports.cssCase = cssCase;
/**
* Iterate over each DOM element without creating intermediary Cheerio instances.
*
* This is indented for use internally to avoid otherwise unnecessary memory
* pressure introduced by _make.
*
* @category Utils
* @param array - The array to iterate over.
* @param fn - Function to call.
* @returns The original instance.
*/
function domEach(array, fn) {
var len = array.length;
for (var i = 0; i < len; i++)
fn(array[i], i);
return array;
}
exports.domEach = domEach;
/**
* Create a deep copy of the given DOM structure. Sets the parents of the copies
* of the passed nodes to `null`.
*
* @private
* @category Utils
* @param dom - The domhandler-compliant DOM structure.
* @returns - The cloned DOM.
*/
function cloneDom(dom) {
var clone = 'length' in dom
? Array.prototype.map.call(dom, function (el) { return (0, domhandler_1.cloneNode)(el, true); })
: [(0, domhandler_1.cloneNode)(dom, true)];
// Add a root node around the cloned nodes
var root = new domhandler_1.Document(clone);
clone.forEach(function (node) {
node.parent = root;
});
return clone;
}
exports.cloneDom = cloneDom;
var CharacterCodes;
(function (CharacterCodes) {
CharacterCodes[CharacterCodes["LowerA"] = 97] = "LowerA";
CharacterCodes[CharacterCodes["LowerZ"] = 122] = "LowerZ";
CharacterCodes[CharacterCodes["UpperA"] = 65] = "UpperA";
CharacterCodes[CharacterCodes["UpperZ"] = 90] = "UpperZ";
CharacterCodes[CharacterCodes["Exclamation"] = 33] = "Exclamation";
})(CharacterCodes || (CharacterCodes = {}));
/**
* Check if string is HTML.
*
* Tests for a `<` within a string, immediate followed by a letter and
* eventually followed by a `>`.
*
* @private
* @category Utils
* @param str - The string to check.
* @returns Indicates if `str` is HTML.
*/
function isHtml(str) {
var tagStart = str.indexOf('<');
if (tagStart < 0 || tagStart > str.length - 3)
return false;
var tagChar = str.charCodeAt(tagStart + 1);
return (((tagChar >= CharacterCodes.LowerA && tagChar <= CharacterCodes.LowerZ) ||
(tagChar >= CharacterCodes.UpperA && tagChar <= CharacterCodes.UpperZ) ||
tagChar === CharacterCodes.Exclamation) &&
str.includes('>', tagStart + 2));
}
exports.isHtml = isHtml;
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