You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
127 lines
4.1 KiB
127 lines
4.1 KiB
"use strict";
|
|
Object.defineProperty(exports, "__esModule", { value: true });
|
|
exports.findAll = exports.existsOne = exports.findOne = exports.findOneChild = exports.find = exports.filter = void 0;
|
|
var domhandler_1 = require("domhandler");
|
|
/**
|
|
* Search a node and its children for nodes passing a test function.
|
|
*
|
|
* @param test Function to test nodes on.
|
|
* @param node Node to search. Will be included in the result set if it matches.
|
|
* @param recurse Also consider child nodes.
|
|
* @param limit Maximum number of nodes to return.
|
|
* @returns All nodes passing `test`.
|
|
*/
|
|
function filter(test, node, recurse, limit) {
|
|
if (recurse === void 0) { recurse = true; }
|
|
if (limit === void 0) { limit = Infinity; }
|
|
if (!Array.isArray(node))
|
|
node = [node];
|
|
return find(test, node, recurse, limit);
|
|
}
|
|
exports.filter = filter;
|
|
/**
|
|
* Search an array of node and its children for nodes passing a test function.
|
|
*
|
|
* @param test Function to test nodes on.
|
|
* @param nodes Array of nodes to search.
|
|
* @param recurse Also consider child nodes.
|
|
* @param limit Maximum number of nodes to return.
|
|
* @returns All nodes passing `test`.
|
|
*/
|
|
function find(test, nodes, recurse, limit) {
|
|
var result = [];
|
|
for (var _i = 0, nodes_1 = nodes; _i < nodes_1.length; _i++) {
|
|
var elem = nodes_1[_i];
|
|
if (test(elem)) {
|
|
result.push(elem);
|
|
if (--limit <= 0)
|
|
break;
|
|
}
|
|
if (recurse && (0, domhandler_1.hasChildren)(elem) && elem.children.length > 0) {
|
|
var children = find(test, elem.children, recurse, limit);
|
|
result.push.apply(result, children);
|
|
limit -= children.length;
|
|
if (limit <= 0)
|
|
break;
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
exports.find = find;
|
|
/**
|
|
* Finds the first element inside of an array that matches a test function.
|
|
*
|
|
* @param test Function to test nodes on.
|
|
* @param nodes Array of nodes to search.
|
|
* @returns The first node in the array that passes `test`.
|
|
*/
|
|
function findOneChild(test, nodes) {
|
|
return nodes.find(test);
|
|
}
|
|
exports.findOneChild = findOneChild;
|
|
/**
|
|
* Finds one element in a tree that passes a test.
|
|
*
|
|
* @param test Function to test nodes on.
|
|
* @param nodes Array of nodes to search.
|
|
* @param recurse Also consider child nodes.
|
|
* @returns The first child node that passes `test`.
|
|
*/
|
|
function findOne(test, nodes, recurse) {
|
|
if (recurse === void 0) { recurse = true; }
|
|
var elem = null;
|
|
for (var i = 0; i < nodes.length && !elem; i++) {
|
|
var checked = nodes[i];
|
|
if (!(0, domhandler_1.isTag)(checked)) {
|
|
continue;
|
|
}
|
|
else if (test(checked)) {
|
|
elem = checked;
|
|
}
|
|
else if (recurse && checked.children.length > 0) {
|
|
elem = findOne(test, checked.children);
|
|
}
|
|
}
|
|
return elem;
|
|
}
|
|
exports.findOne = findOne;
|
|
/**
|
|
* @param test Function to test nodes on.
|
|
* @param nodes Array of nodes to search.
|
|
* @returns Whether a tree of nodes contains at least one node passing a test.
|
|
*/
|
|
function existsOne(test, nodes) {
|
|
return nodes.some(function (checked) {
|
|
return (0, domhandler_1.isTag)(checked) &&
|
|
(test(checked) ||
|
|
(checked.children.length > 0 &&
|
|
existsOne(test, checked.children)));
|
|
});
|
|
}
|
|
exports.existsOne = existsOne;
|
|
/**
|
|
* Search and array of nodes and its children for nodes passing a test function.
|
|
*
|
|
* Same as `find`, only with less options, leading to reduced complexity.
|
|
*
|
|
* @param test Function to test nodes on.
|
|
* @param nodes Array of nodes to search.
|
|
* @returns All nodes passing `test`.
|
|
*/
|
|
function findAll(test, nodes) {
|
|
var _a;
|
|
var result = [];
|
|
var stack = nodes.filter(domhandler_1.isTag);
|
|
var elem;
|
|
while ((elem = stack.shift())) {
|
|
var children = (_a = elem.children) === null || _a === void 0 ? void 0 : _a.filter(domhandler_1.isTag);
|
|
if (children && children.length > 0) {
|
|
stack.unshift.apply(stack, children);
|
|
}
|
|
if (test(elem))
|
|
result.push(elem);
|
|
}
|
|
return result;
|
|
}
|
|
exports.findAll = findAll;
|