81 lines
2.1 KiB
JavaScript
81 lines
2.1 KiB
JavaScript
/* Copyright 2022 Mozilla Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import { stringToUTF8String, warn } from "../shared/util.js";
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import { parseXFAPath } from "./core_utils.js";
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import { SimpleXMLParser } from "./xml_parser.js";
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function decodeString(str) {
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try {
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return stringToUTF8String(str);
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} catch (ex) {
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warn(`UTF-8 decoding failed: "${ex}".`);
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return str;
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}
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}
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class DatasetXMLParser extends SimpleXMLParser {
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constructor(options) {
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super(options);
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this.node = null;
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}
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onEndElement(name) {
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const node = super.onEndElement(name);
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if (node && name === "xfa:datasets") {
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this.node = node;
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// We don't need anything else, so just kill the parser.
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throw new Error("Aborting DatasetXMLParser.");
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}
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}
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}
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class DatasetReader {
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constructor(data) {
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if (data.datasets) {
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this.node = new SimpleXMLParser({ hasAttributes: true }).parseFromString(
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data.datasets
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).documentElement;
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} else {
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const parser = new DatasetXMLParser({ hasAttributes: true });
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try {
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parser.parseFromString(data["xdp:xdp"]);
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} catch (_) {}
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this.node = parser.node;
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}
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}
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getValue(path) {
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if (!this.node || !path) {
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return "";
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}
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const node = this.node.searchNode(parseXFAPath(path), 0);
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if (!node) {
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return "";
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}
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const first = node.firstChild;
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if (first && first.nodeName === "value") {
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return node.children.map(child => decodeString(child.textContent));
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}
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return decodeString(node.textContent);
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}
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}
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export { DatasetReader };
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