118 lines
3.2 KiB
JavaScript
118 lines
3.2 KiB
JavaScript
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var attributes = require("./attributes.js");
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var Pseudos = require("./pseudos");
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/*
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all available rules
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*/
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module.exports = {
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__proto__: null,
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attribute: attributes.compile,
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pseudo: Pseudos.compile,
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//tags
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tag: function(next, data, options) {
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var name = data.name;
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var adapter = options.adapter;
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return function tag(elem) {
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return adapter.getName(elem) === name && next(elem);
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};
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},
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//traversal
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descendant: function(next, data, options) {
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// eslint-disable-next-line no-undef
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var isFalseCache = typeof WeakSet !== "undefined" ? new WeakSet() : null;
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var adapter = options.adapter;
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return function descendant(elem) {
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var found = false;
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while (!found && (elem = adapter.getParent(elem))) {
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if (!isFalseCache || !isFalseCache.has(elem)) {
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found = next(elem);
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if (!found && isFalseCache) {
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isFalseCache.add(elem);
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}
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}
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}
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return found;
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};
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},
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_flexibleDescendant: function(next, data, options) {
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var adapter = options.adapter;
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// Include element itself, only used while querying an array
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return function descendant(elem) {
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var found = next(elem);
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while (!found && (elem = adapter.getParent(elem))) {
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found = next(elem);
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}
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return found;
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};
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},
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parent: function(next, data, options) {
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if (options && options.strict) {
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throw new Error("Parent selector isn't part of CSS3");
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}
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var adapter = options.adapter;
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return function parent(elem) {
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return adapter.getChildren(elem).some(test);
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};
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function test(elem) {
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return adapter.isTag(elem) && next(elem);
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}
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},
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child: function(next, data, options) {
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var adapter = options.adapter;
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return function child(elem) {
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var parent = adapter.getParent(elem);
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return !!parent && next(parent);
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};
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},
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sibling: function(next, data, options) {
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var adapter = options.adapter;
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return function sibling(elem) {
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var siblings = adapter.getSiblings(elem);
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for (var i = 0; i < siblings.length; i++) {
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if (adapter.isTag(siblings[i])) {
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if (siblings[i] === elem) break;
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if (next(siblings[i])) return true;
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}
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}
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return false;
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};
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},
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adjacent: function(next, data, options) {
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var adapter = options.adapter;
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return function adjacent(elem) {
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var siblings = adapter.getSiblings(elem),
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lastElement;
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for (var i = 0; i < siblings.length; i++) {
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if (adapter.isTag(siblings[i])) {
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if (siblings[i] === elem) break;
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lastElement = siblings[i];
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}
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}
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return !!lastElement && next(lastElement);
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};
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},
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universal: function(next) {
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return next;
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}
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};
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