Issue #1258 - Part 1: Import mailnews, ldap, and mork from comm-esr52.9.1

mailnews/base/util/JXON.js

@@ -0,0 +1,180 @@
+/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// This is a modification of the JXON parsers found on the page
+// <https://developer.mozilla.org/en-US/docs/JXON>
+
+var EXPORTED_SYMBOLS = ["JXON"];
+
+var JXON = new (function() {
+  const sValueProp = "value"; /* you can customize these values */
+  const sAttributesProp = "attr";
+  const sAttrPref = "@";
+  const sElementListPrefix = "$";
+  const sConflictSuffix = "_"; // used when there's a name conflict with special JXON properties
+  const aCache = [];
+  const rIsNull = /^\s*$/;
+  const rIsBool = /^(?:true|false)$/i;
+
+  function parseText(sValue) {
+    //if (rIsNull.test(sValue))
+    //  return null;
+    if (rIsBool.test(sValue)) 
+      return sValue.toLowerCase() === "true";
+    if (isFinite(sValue))
+      return parseFloat(sValue);
+    if (isFinite(Date.parse(sValue)))
+      return new Date(sValue);
+    return sValue;
+  };
+
+  function EmptyTree() {
+  }
+  EmptyTree.prototype = {
+    toString : function () {
+      return "null";
+    },
+    valueOf : function () {
+      return null;
+    },
+  };
+
+  function objectify(vValue) {
+    if (vValue === null)
+      return new EmptyTree();
+    else if (vValue instanceof Object)
+      return vValue;
+    else
+      return new vValue.constructor(vValue); // What does this? copy?
+  };
+
+  function createObjTree(oParentNode, nVerb, bFreeze, bNesteAttr) {
+    const nLevelStart = aCache.length;
+    const bChildren = oParentNode.hasChildNodes();
+    const bAttributes = oParentNode.attributes &&
+                        oParentNode.attributes.length;
+    const bHighVerb = Boolean(nVerb & 2);
+
+    var sProp = 0;
+    var vContent = 0;
+    var nLength = 0;
+    var sCollectedTxt = "";
+    var vResult = bHighVerb ? {} : /* put here the default value for empty nodes: */ true;
+
+    if (bChildren) {
+      for (var oNode, nItem = 0; nItem < oParentNode.childNodes.length; nItem++) {
+        oNode = oParentNode.childNodes.item(nItem);
+        if (oNode.nodeType === 4) // CDATASection
+          sCollectedTxt += oNode.nodeValue; 
+        else if (oNode.nodeType === 3) // Text
+          sCollectedTxt += oNode.nodeValue;
+        else if (oNode.nodeType === 1) // Element
+          aCache.push(oNode);
+      }
+    }
+
+    const nLevelEnd = aCache.length;
+    const vBuiltVal = parseText(sCollectedTxt);
+
+    if (!bHighVerb && (bChildren || bAttributes))
+      vResult = nVerb === 0 ? objectify(vBuiltVal) : {};
+
+    for (var nElId = nLevelStart; nElId < nLevelEnd; nElId++) {
+      sProp = aCache[nElId].nodeName;
+      if (sProp == sValueProp || sProp == sAttributesProp)
+        sProp = sProp + sConflictSuffix;
+      vContent = createObjTree(aCache[nElId], nVerb, bFreeze, bNesteAttr);
+      if (!vResult.hasOwnProperty(sProp)) {
+        vResult[sProp] = vContent;
+        vResult[sElementListPrefix + sProp] = [];
+      }
+      vResult[sElementListPrefix + sProp].push(vContent);
+      nLength++;
+    }
+
+    if (bAttributes) {
+      const nAttrLen = oParentNode.attributes.length;
+      const sAPrefix = bNesteAttr ? "" : sAttrPref;
+      const oAttrParent = bNesteAttr ? {} : vResult;
+
+      for (var oAttrib, nAttrib = 0; nAttrib < nAttrLen; nLength++, nAttrib++) {
+        oAttrib = oParentNode.attributes.item(nAttrib);
+        oAttrParent[sAPrefix + oAttrib.name] = parseText(oAttrib.value);
+      }
+
+      if (bNesteAttr) {
+        if (bFreeze)
+          Object.freeze(oAttrParent);
+        vResult[sAttributesProp] = oAttrParent;
+        nLength -= nAttrLen - 1;
+      }
+    }
+
+    if (nVerb === 3 || (nVerb === 2 || nVerb === 1 && nLength > 0) && sCollectedTxt)
+      vResult[sValueProp] = vBuiltVal;
+    else if (!bHighVerb && nLength === 0 && sCollectedTxt)
+      vResult = vBuiltVal;
+
+    if (bFreeze && (bHighVerb || nLength > 0))
+      Object.freeze(vResult);
+
+    aCache.length = nLevelStart;
+
+    return vResult;
+  };
+
+  function loadObjTree(oXMLDoc, oParentEl, oParentObj) {
+    var vValue, oChild;
+
+    if (oParentObj instanceof String || oParentObj instanceof Number ||
+        oParentObj instanceof Boolean)
+      oParentEl.appendChild(oXMLDoc.createTextNode(oParentObj.toString())); /* verbosity level is 0 */
+    else if (oParentObj.constructor === Date)
+      oParentEl.appendChild(oXMLDoc.createTextNode(oParentObj.toGMTString()));
+
+    for (var sName in oParentObj) {
+      vValue = oParentObj[sName];
+      if (isFinite(sName) || vValue instanceof Function)
+        continue; /* verbosity level is 0 */
+      if (sName === sValueProp) {
+        if (vValue !== null && vValue !== true) {
+          oParentEl.appendChild(oXMLDoc.createTextNode(
+              vValue.constructor === Date ? vValue.toGMTString() : String(vValue)));
+        }
+      } else if (sName === sAttributesProp) { /* verbosity level is 3 */
+        for (var sAttrib in vValue)
+          oParentEl.setAttribute(sAttrib, vValue[sAttrib]);
+      } else if (sName.charAt(0) === sAttrPref) {
+        oParentEl.setAttribute(sName.slice(1), vValue);
+      } else if (vValue.constructor === Array) {
+        for (var nItem = 0; nItem < vValue.length; nItem++) {
+          oChild = oXMLDoc.createElement(sName);
+          loadObjTree(oXMLDoc, oChild, vValue[nItem]);
+          oParentEl.appendChild(oChild);
+        }
+      } else {
+        oChild = oXMLDoc.createElement(sName);
+        if (vValue instanceof Object)
+          loadObjTree(oXMLDoc, oChild, vValue);
+        else if (vValue !== null && vValue !== true)
+          oChild.appendChild(oXMLDoc.createTextNode(vValue.toString()));
+        oParentEl.appendChild(oChild);
+     }
+   }
+  };
+
+  this.build = function(oXMLParent, nVerbosity /* optional */, bFreeze /* optional */, bNesteAttributes /* optional */) {
+    const _nVerb = arguments.length > 1 &&
+        typeof nVerbosity === "number" ? nVerbosity & 3 :
+        /* put here the default verbosity level: */ 1;
+    return createObjTree(oXMLParent, _nVerb, bFreeze || false,
+        arguments.length > 3 ? bNesteAttributes : _nVerb === 3);
+  };
+
+  this.unbuild = function(oObjTree) {
+    const oNewDoc = document.implementation.createDocument("", "", null);
+    loadObjTree(oNewDoc, oNewDoc, oObjTree);
+    return oNewDoc;
+  };
+})();