Unifying attributes with other child nodes. (#84)

* Unifying attributes with the rest of child nodes.
* Refactoring `Xslt` class.
* Refactoring `xml-functions` and `xml-parser` to use child nodes as attributes.
* `xmlValue` should not consider attributes.
* Fixing unit tests that were using `attributes` property to assert results.
* Getting rid of `transformedAttributes`.
* The XML output should *not* consider attributes for determine whether tags should be self-closed or not.
* - Improving types among different sources;
- Fixing xPath expressions to not consider attributes for most of cases.
* - Even more types;
- Changing `xsltVariable` to not consider attributes while deciding how to set the `NodeValue` object.
* Fixing typing for `PredicateExpr`.

src/dom/functions.ts

@@ -7,7 +7,7 @@ import { XDocument } from "./xdocument";
 import { XNode } from './xnode';
 
 // Wrapper around DOM methods so we can condense their invocations.
-export function domGetAttributeValue(node: any, name: string) {
+export function domGetAttributeValue(node: XNode, name: string) {
     return node.getAttributeValue(name);
 }
 

src/dom/xdocument.ts

@@ -20,10 +20,11 @@ export class XDocument extends XNode {
         this.documentElement = null;
     }
 
-    clear() {
+    // TODO: Do we still need this?
+    /* clear() {
         XNode.recycle(this.documentElement);
         this.documentElement = null;
-    }
+    } */
 
     appendChild(node: any) {
         super.appendChild(node);

src/dom/xml-functions.ts

@@ -25,7 +25,7 @@ import { XmlOutputOptions } from './xml-output-options';
  * @param disallowBrowserSpecificOptimization A boolean, to avoid browser optimization.
  * @returns The XML value as a string.
  */
-export function xmlValue(node: any, disallowBrowserSpecificOptimization: boolean = false): string {
+export function xmlValue(node: XNode | any, disallowBrowserSpecificOptimization: boolean = false): string {
     if (!node) {
         return '';
     }
@@ -42,25 +42,28 @@ export function xmlValue(node: any, disallowBrowserSpecificOptimization: boolean
         case DOM_DOCUMENT_NODE:
         case DOM_DOCUMENT_FRAGMENT_NODE:
             if (!disallowBrowserSpecificOptimization) {
-                // IE, Safari, Opera, and friends
+                // Only returns something if node has either `innerText` or `textContent` (not an XNode).
+                // IE, Safari, Opera, and friends (`innerText`)
                 const innerText = node.innerText;
                 if (innerText != undefined) {
                     return innerText;
                 }
-                // Firefox
+                // Firefox (`textContent`)
                 const textContent = node.textContent;
                 if (textContent != undefined) {
                     return textContent;
                 }
             }
 
             if (node.transformedChildNodes.length > 0) {
-                for (let i = 0; i < node.transformedChildNodes.length; ++i) {
-                    ret += xmlValue(node.transformedChildNodes[i]);
+                const transformedTextNodes = node.transformedChildNodes.filter((n: XNode) => n.nodeType !== DOM_ATTRIBUTE_NODE);
+                for (let i = 0; i < transformedTextNodes.length; ++i) {
+                    ret += xmlValue(transformedTextNodes[i]);
                 }
             } else {
-                for (let i = 0; i < node.childNodes.length; ++i) {
-                    ret += xmlValue(node.childNodes[i]);
+                const textNodes = node.childNodes.filter((n: XNode) => n.nodeType !== DOM_ATTRIBUTE_NODE);
+                for (let i = 0; i < textNodes.length; ++i) {
+                    ret += xmlValue(textNodes[i]);
                 }
             }
 
@@ -96,7 +99,7 @@ export function xmlValue2(node: any, disallowBrowserSpecificOptimization: boolea
                 return textContent;
             }
         }
-        // pobrecito!
+
         const len = node.transformedChildNodes.length;
         for (let i = 0; i < len; ++i) {
             ret += xmlValue(node.transformedChildNodes[i]);
@@ -137,10 +140,15 @@ function xmlTextRecursive(node: XNode, buffer: string[], options: XmlOutputOptio
         buffer.push(`<!--${node.nodeValue}-->`);
     } else if (node.nodeType == DOM_ELEMENT_NODE) {
         buffer.push(`<${xmlFullNodeName(node)}`);
-        for (let i = 0; i < node.attributes.length; ++i) {
-            const a = node.attributes[i];
-            if (a && a.nodeName && a.nodeValue) {
-                buffer.push(` ${xmlFullNodeName(a)}="${xmlEscapeAttr(a.nodeValue)}"`);
+
+        for (let i = 0; i < node.childNodes.length; ++i) {
+            const childNode = node.childNodes[i];
+            if (!childNode || childNode.nodeType !== DOM_ATTRIBUTE_NODE) {
+                continue;
+            }
+
+            if (childNode.nodeName && childNode.nodeValue) {
+                buffer.push(` ${xmlFullNodeName(childNode)}="${xmlEscapeAttr(childNode.nodeValue)}"`);
             }
         }
 
@@ -233,7 +241,11 @@ function xmlTransformedTextRecursive(node: XNode, buffer: any[], options: XmlOut
 function xmlElementLogicTrivial(node: XNode, buffer: string[], options: XmlOutputOptions) {
     buffer.push(`<${xmlFullNodeName(node)}`);
 
-    const attributes = node.transformedAttributes || node.attributes;
+    let attributes = node.transformedChildNodes.filter(n => n.nodeType === DOM_ATTRIBUTE_NODE);
+    if (attributes.length === 0) {
+        attributes = node.childNodes.filter(n => n.nodeType === DOM_ATTRIBUTE_NODE);
+    }
+
     for (let i = 0; i < attributes.length; ++i) {
         const attribute = attributes[i];
         if (!attribute) {
@@ -245,7 +257,11 @@ function xmlElementLogicTrivial(node: XNode, buffer: string[], options: XmlOutpu
         }
     }
 
-    let childNodes = node.transformedChildNodes.length > 0 ? node.transformedChildNodes : node.childNodes;
+    let childNodes = node.transformedChildNodes.filter(n => n.nodeType !== DOM_ATTRIBUTE_NODE);
+    if (childNodes.length === 0) {
+        childNodes = node.childNodes.filter(n => n.nodeType !== DOM_ATTRIBUTE_NODE);
+    }
+
     childNodes = childNodes.sort((a, b) => a.siblingPosition - b.siblingPosition);
     if (childNodes.length === 0) {
         if (options.outputMethod === 'html' && ['hr', 'link', 'meta'].includes(node.nodeName)) {

src/dom/xml-parser.ts

@@ -19,6 +19,7 @@ import {
     XML11_VERSION_INFO
 } from './xmltoken';
 import { XNode } from './xnode';
+import { DOM_ATTRIBUTE_NODE } from '../constants';
 
 /**
  * Original author: Steffen Meschkat <[email protected]> (the `xmlParse` function,
@@ -67,12 +68,17 @@ export class XmlParser {
         };
         let n = node;
         while (n !== null) {
-            for (let i = 0; i < n.attributes.length; i++) {
-                if (n.attributes[i].nodeName.startsWith('xmlns:')) {
-                    const prefix = n.attributes[i].nodeName.split(':')[1];
-                    if (!(prefix in map)) map[prefix] = n.attributes[i].nodeValue;
-                } else if (n.attributes[i].nodeName == 'xmlns') {
-                    if (!('' in map)) map[''] = n.attributes[i].nodeValue || null;
+            for (let i = 0; i < n.childNodes.length; i++) {
+                const childNode = n.childNodes[i];
+                if (childNode.nodeType !== DOM_ATTRIBUTE_NODE) {
+                    continue;
+                }
+
+                if (childNode.nodeName.startsWith('xmlns:')) {
+                    const prefix = childNode.nodeName.split(':')[1];
+                    if (!(prefix in map)) map[prefix] = childNode.nodeValue;
+                } else if (childNode.nodeName == 'xmlns') {
+                    if (!('' in map)) map[''] = childNode.nodeValue || null;
                 }
             }
             n = n.parentNode;
@@ -258,11 +264,15 @@ export class XmlParser {
                     } else {
                         if ('' in namespaceMap) node.namespaceUri = namespaceMap[''];
                     }
-                    for (let i = 0; i < node.attributes.length; ++i) {
-                        if (node.attributes[i].prefix !== null) {
-                            if (node.attributes[i].prefix in namespaceMap) {
-                                node.attributes[i].namespaceUri = namespaceMap[node.attributes[i].prefix];
-                            }
+
+                    for (let i = 0; i < node.childNodes.length; ++i) {
+                        const childNode = node.childNodes[i];
+                        if (childNode.nodeType !== DOM_ATTRIBUTE_NODE) {
+                            continue;
+                        }
+
+                        if (childNode.prefix !== null && childNode.prefix in namespaceMap) {
+                            childNode.namespaceUri = namespaceMap[childNode.prefix];
                             // else, prefix undefined.
                         }
                         // elements with no prefix always have no namespace, so do nothing here.