230 lines
8.7 KiB
JavaScript
230 lines
8.7 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.C14nCanonicalizationWithComments = exports.C14nCanonicalization = void 0;
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const utils = require("./utils");
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const isDomNode = require("@xmldom/is-dom-node");
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class C14nCanonicalization {
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constructor() {
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this.includeComments = false;
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this.includeComments = false;
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}
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attrCompare(a, b) {
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if (!a.namespaceURI && b.namespaceURI) {
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return -1;
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}
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if (!b.namespaceURI && a.namespaceURI) {
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return 1;
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}
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const left = a.namespaceURI + a.localName;
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const right = b.namespaceURI + b.localName;
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if (left === right) {
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return 0;
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}
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else if (left < right) {
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return -1;
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}
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else {
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return 1;
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}
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}
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nsCompare(a, b) {
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const attr1 = a.prefix;
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const attr2 = b.prefix;
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if (attr1 === attr2) {
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return 0;
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}
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return attr1.localeCompare(attr2);
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}
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renderAttrs(node) {
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let i;
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let attr;
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const attrListToRender = [];
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if (isDomNode.isCommentNode(node)) {
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return this.renderComment(node);
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}
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if (node.attributes) {
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for (i = 0; i < node.attributes.length; ++i) {
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attr = node.attributes[i];
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//ignore namespace definition attributes
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if (attr.name.indexOf("xmlns") === 0) {
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continue;
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}
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attrListToRender.push(attr);
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}
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}
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attrListToRender.sort(this.attrCompare);
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const res = attrListToRender.map((attr) => {
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return ` ${attr.name}="${utils.encodeSpecialCharactersInAttribute(attr.value)}"`;
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});
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return res.join("");
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}
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/**
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* Create the string of all namespace declarations that should appear on this element
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*
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* @param node The node we now render
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* @param prefixesInScope The prefixes defined on this node parents which are a part of the output set
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* @param defaultNs The current default namespace
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* @param defaultNsForPrefix
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* @param ancestorNamespaces Import ancestor namespaces if it is specified
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* @api private
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*/
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renderNs(node, prefixesInScope, defaultNs, defaultNsForPrefix, ancestorNamespaces) {
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let i;
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let attr;
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const res = [];
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let newDefaultNs = defaultNs;
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const nsListToRender = [];
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const currNs = node.namespaceURI || "";
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//handle the namespace of the node itself
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if (node.prefix) {
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if (prefixesInScope.indexOf(node.prefix) === -1) {
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nsListToRender.push({
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prefix: node.prefix,
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namespaceURI: node.namespaceURI || defaultNsForPrefix[node.prefix],
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});
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prefixesInScope.push(node.prefix);
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}
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}
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else if (defaultNs !== currNs) {
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//new default ns
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newDefaultNs = node.namespaceURI || "";
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res.push(' xmlns="', newDefaultNs, '"');
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}
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//handle the attributes namespace
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if (node.attributes) {
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for (i = 0; i < node.attributes.length; ++i) {
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attr = node.attributes[i];
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//handle all prefixed attributes that are included in the prefix list and where
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//the prefix is not defined already. New prefixes can only be defined by `xmlns:`.
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if (attr.prefix === "xmlns" && prefixesInScope.indexOf(attr.localName) === -1) {
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nsListToRender.push({ prefix: attr.localName, namespaceURI: attr.value });
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prefixesInScope.push(attr.localName);
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}
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//handle all prefixed attributes that are not xmlns definitions and where
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//the prefix is not defined already
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if (attr.prefix &&
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prefixesInScope.indexOf(attr.prefix) === -1 &&
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attr.prefix !== "xmlns" &&
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attr.prefix !== "xml") {
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nsListToRender.push({ prefix: attr.prefix, namespaceURI: attr.namespaceURI });
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prefixesInScope.push(attr.prefix);
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}
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}
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}
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if (utils.isArrayHasLength(ancestorNamespaces)) {
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// Remove namespaces which are already present in nsListToRender
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for (const ancestorNamespace of ancestorNamespaces) {
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let alreadyListed = false;
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for (const nsToRender of nsListToRender) {
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if (nsToRender.prefix === ancestorNamespace.prefix &&
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nsToRender.namespaceURI === ancestorNamespace.namespaceURI) {
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alreadyListed = true;
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}
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}
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if (!alreadyListed) {
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nsListToRender.push(ancestorNamespace);
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}
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}
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}
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nsListToRender.sort(this.nsCompare);
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//render namespaces
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res.push(...nsListToRender.map((attr) => {
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if (attr.prefix) {
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return ` xmlns:${attr.prefix}="${attr.namespaceURI}"`;
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}
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return ` xmlns="${attr.namespaceURI}"`;
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}));
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return { rendered: res.join(""), newDefaultNs };
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}
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/**
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* @param node Node
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*/
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processInner(node, prefixesInScope, defaultNs, defaultNsForPrefix, ancestorNamespaces) {
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if (isDomNode.isCommentNode(node)) {
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return this.renderComment(node);
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}
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if (node.data) {
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return utils.encodeSpecialCharactersInText(node.data);
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}
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if (isDomNode.isElementNode(node)) {
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let i;
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let pfxCopy;
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const ns = this.renderNs(node, prefixesInScope, defaultNs, defaultNsForPrefix, ancestorNamespaces);
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const res = ["<", node.tagName, ns.rendered, this.renderAttrs(node), ">"];
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for (i = 0; i < node.childNodes.length; ++i) {
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pfxCopy = prefixesInScope.slice(0);
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res.push(this.processInner(node.childNodes[i], pfxCopy, ns.newDefaultNs, defaultNsForPrefix, []));
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}
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res.push("</", node.tagName, ">");
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return res.join("");
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}
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throw new Error(`Unable to canonicalize node type: ${node.nodeType}`);
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}
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// Thanks to deoxxa/xml-c14n for comment renderer
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renderComment(node) {
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if (!this.includeComments) {
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return "";
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}
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const isOutsideDocument = node.ownerDocument === node.parentNode;
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let isBeforeDocument = false;
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let isAfterDocument = false;
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if (isOutsideDocument) {
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let nextNode = node;
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let previousNode = node;
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while (nextNode !== null) {
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if (nextNode === node.ownerDocument.documentElement) {
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isBeforeDocument = true;
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break;
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}
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nextNode = nextNode.nextSibling;
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}
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while (previousNode !== null) {
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if (previousNode === node.ownerDocument.documentElement) {
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isAfterDocument = true;
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break;
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}
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previousNode = previousNode.previousSibling;
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}
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}
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const afterDocument = isAfterDocument ? "\n" : "";
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const beforeDocument = isBeforeDocument ? "\n" : "";
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const encodedText = utils.encodeSpecialCharactersInText(node.data);
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return `${afterDocument}<!--${encodedText}-->${beforeDocument}`;
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}
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/**
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* Perform canonicalization of the given node
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*
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* @param node
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* @api public
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*/
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process(node, options) {
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options = options || {};
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const defaultNs = options.defaultNs || "";
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const defaultNsForPrefix = options.defaultNsForPrefix || {};
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const ancestorNamespaces = options.ancestorNamespaces || [];
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const prefixesInScope = [];
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for (let i = 0; i < ancestorNamespaces.length; i++) {
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prefixesInScope.push(ancestorNamespaces[i].prefix);
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}
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const res = this.processInner(node, prefixesInScope, defaultNs, defaultNsForPrefix, ancestorNamespaces);
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return res;
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}
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getAlgorithmName() {
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return "http://www.w3.org/TR/2001/REC-xml-c14n-20010315";
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}
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}
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exports.C14nCanonicalization = C14nCanonicalization;
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/**
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* Add c14n#WithComments here (very simple subclass)
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*/
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class C14nCanonicalizationWithComments extends C14nCanonicalization {
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constructor() {
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super();
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this.includeComments = true;
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}
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getAlgorithmName() {
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return "http://www.w3.org/TR/2001/REC-xml-c14n-20010315#WithComments";
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}
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}
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exports.C14nCanonicalizationWithComments = C14nCanonicalizationWithComments;
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//# sourceMappingURL=c14n-canonicalization.js.map
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