101 lines
3.3 KiB
JavaScript
101 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.updateEvaluator = exports.evaluateString = exports.evaluateBoolean = exports.getLeafNodes = exports.evalXPath = exports.resolveNameSpace = exports.xpath = void 0;
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const engine_1 = require("./engine");
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const EngineConst = require("../common/engine_const");
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const system_external_1 = require("./system_external");
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function xpathSupported() {
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if (typeof XPathResult === 'undefined') {
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return false;
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}
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return true;
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}
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exports.xpath = {
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currentDocument: null,
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evaluate: xpathSupported()
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? document.evaluate
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: system_external_1.default.xpath.evaluate,
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result: xpathSupported() ? XPathResult : system_external_1.default.xpath.XPathResult,
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createNSResolver: xpathSupported()
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? document.createNSResolver
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: system_external_1.default.xpath.createNSResolver
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};
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const nameSpaces = {
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xhtml: 'http://www.w3.org/1999/xhtml',
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mathml: 'http://www.w3.org/1998/Math/MathML',
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mml: 'http://www.w3.org/1998/Math/MathML',
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svg: 'http://www.w3.org/2000/svg'
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};
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function resolveNameSpace(prefix) {
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return nameSpaces[prefix] || null;
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}
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exports.resolveNameSpace = resolveNameSpace;
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class Resolver {
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constructor() {
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this.lookupNamespaceURI = resolveNameSpace;
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}
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}
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function evaluateXpath(expression, rootNode, type) {
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return engine_1.default.getInstance().mode === EngineConst.Mode.HTTP &&
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!engine_1.default.getInstance().isIE &&
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!engine_1.default.getInstance().isEdge
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? exports.xpath.currentDocument.evaluate(expression, rootNode, resolveNameSpace, type, null)
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: exports.xpath.evaluate(expression, rootNode, new Resolver(), type, null);
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}
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function evalXPath(expression, rootNode) {
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let iterator;
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try {
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iterator = evaluateXpath(expression, rootNode, exports.xpath.result.ORDERED_NODE_ITERATOR_TYPE);
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}
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catch (err) {
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return [];
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}
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const results = [];
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for (let xpathNode = iterator.iterateNext(); xpathNode; xpathNode = iterator.iterateNext()) {
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results.push(xpathNode);
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}
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return results;
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}
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exports.evalXPath = evalXPath;
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function getLeafNodes(rootNode) {
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return evalXPath('.//*[count(*)=0]', rootNode);
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}
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exports.getLeafNodes = getLeafNodes;
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function evaluateBoolean(expression, rootNode) {
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let result;
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try {
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result = evaluateXpath(expression, rootNode, exports.xpath.result.BOOLEAN_TYPE);
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}
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catch (err) {
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return false;
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}
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return result.booleanValue;
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}
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exports.evaluateBoolean = evaluateBoolean;
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function evaluateString(expression, rootNode) {
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let result;
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try {
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result = evaluateXpath(expression, rootNode, exports.xpath.result.STRING_TYPE);
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}
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catch (err) {
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return '';
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}
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return result.stringValue;
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}
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exports.evaluateString = evaluateString;
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function updateEvaluator(node) {
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if (engine_1.default.getInstance().mode !== EngineConst.Mode.HTTP)
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return;
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let parent = node;
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while (parent && !parent.evaluate) {
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parent = parent.parentNode;
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}
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if (parent && parent.evaluate) {
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exports.xpath.currentDocument = parent;
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}
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else if (node.ownerDocument) {
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exports.xpath.currentDocument = node.ownerDocument;
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}
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}
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exports.updateEvaluator = updateEvaluator;
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