speech-rule-engine/cjs/common/xpath_util.js

A standalone speech rule engine for XML structures, based on the original engine from ChromeVox.

"use strict";
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      desc = { enumerable: true, get: function() { return m[k]; } };
    }
    Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
    Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
    o["default"] = v;
});
var __importStar = (this && this.__importStar) || (function () {
    var ownKeys = function(o) {
        ownKeys = Object.getOwnPropertyNames || function (o) {
            var ar = [];
            for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
            return ar;
        };
        return ownKeys(o);
    };
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        if (mod && mod.__esModule) return mod;
        var result = {};
        if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
        __setModuleDefault(result, mod);
        return result;
    };
})();
Object.defineProperty(exports, "__esModule", { value: true });
exports.xpath = void 0;
exports.resolveNameSpace = resolveNameSpace;
exports.evalXPath = evalXPath;
exports.evaluateBoolean = evaluateBoolean;
exports.evaluateString = evaluateString;
exports.updateEvaluator = updateEvaluator;
const engine_js_1 = require("./engine.js");
const EngineConst = __importStar(require("../common/engine_const.js"));
const system_external_js_1 = require("./system_external.js");
exports.xpath = system_external_js_1.SystemExternal.xpath;
const nameSpaces = {
    xhtml: 'http://www.w3.org/1999/xhtml',
    mathml: 'http://www.w3.org/1998/Math/MathML',
    mml: 'http://www.w3.org/1998/Math/MathML',
    svg: 'http://www.w3.org/2000/svg'
};
function resolveNameSpace(prefix) {
    return nameSpaces[prefix] || null;
}
class Resolver {
    constructor() {
        this.lookupNamespaceURI = resolveNameSpace;
    }
}
function evaluateXpath(expression, rootNode, type) {
    return exports.xpath.evaluate(expression, rootNode, new Resolver(), type, null);
}
function evalXPath(expression, rootNode) {
    let iterator;
    try {
        iterator = evaluateXpath(expression, rootNode, exports.xpath.result.ORDERED_NODE_ITERATOR_TYPE);
    }
    catch (_err) {
        return [];
    }
    const results = [];
    for (let xpathNode = iterator.iterateNext(); xpathNode; xpathNode = iterator.iterateNext()) {
        results.push(xpathNode);
    }
    return results;
}
function evaluateBoolean(expression, rootNode) {
    let result;
    try {
        result = evaluateXpath(expression, rootNode, exports.xpath.result.BOOLEAN_TYPE);
    }
    catch (_err) {
        return false;
    }
    return result.booleanValue;
}
function evaluateString(expression, rootNode) {
    let result;
    try {
        result = evaluateXpath(expression, rootNode, exports.xpath.result.STRING_TYPE);
    }
    catch (_err) {
        return '';
    }
    return result.stringValue;
}
function updateEvaluator(node) {
    if (engine_js_1.Engine.getInstance().mode !== EngineConst.Mode.HTTP)
        return;
    let parent = node;
    while (parent && !parent.evaluate) {
        parent = parent.parentNode;
    }
    if (parent && parent.evaluate) {
        exports.xpath.currentDocument = parent;
    }
    else if (node.ownerDocument) {
        exports.xpath.currentDocument = node.ownerDocument;
    }
}
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