chore(docs): add ability to generate xmldocs (#5164)

Introduces a naive XmlDocs renderer for Markdown nodes. It needs to be called separately for now.

utils/doclint/xmlDocumentation.js

@@ -0,0 +1,141 @@
+/**
+ * Copyright (c) Microsoft Corporation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// @ts-check
+const Documentation = require('./documentation');
+const { visitAll } = require('../markdown');
+/**
+ * @param {Documentation.MarkdownNode[]} nodes
+ * @param {number} maxColumns
+ */
+function renderXmlDoc(nodes, maxColumns = 80, prefix = '/// ') {
+  if (!nodes)
+    return [];
+
+  const renderResult = _innerRenderNodes(nodes, maxColumns);
+
+  const doc = [];
+  _wrapInNode('summary', renderResult.summary, doc);
+  _wrapInNode('remarks', renderResult.remarks, doc);
+  return doc.map(x => `${prefix}${x}`);
+}
+
+function _innerRenderNodes(nodes, maxColumns = 80, wrapParagraphs = true) {
+  const summary = [];
+  const remarks = [];
+  const handleListItem = (lastNode, node) => {
+    if (node && node.type === 'li' && (!lastNode || lastNode.type !== 'li'))
+      summary.push(`<list type="${node.liType}">`);
+    else if (lastNode && lastNode.type === 'li' && (!node || node.type !== 'li'))
+      summary.push('</list>');
+
+  };
+
+  let lastNode;
+  visitAll(nodes, node => {
+    // handle special cases first
+    if (_nodeShouldBeIgnored(node))
+      return;
+    if (node.text && node.text.startsWith('extends: ')) {
+      remarks.push('Inherits from ' + node.text.replace('extends: ', ''));
+      return;
+    }
+    handleListItem(lastNode, node);
+    if (node.type === 'text') {
+      if (wrapParagraphs)
+        _wrapInNode('para', _wrapAndEscape(node, maxColumns), summary);
+      else
+        summary.push(..._wrapAndEscape(node, maxColumns));
+    } else if (node.type === 'code' && node.codeLang === 'csharp') {
+      _wrapInNode('code', node.lines, summary);
+    } else if (node.type === 'li') {
+      _wrapInNode('item><description', _wrapAndEscape(node, maxColumns), summary, '/description></item');
+    } else if (node.type === 'note') {
+      _wrapInNode('para', _wrapAndEscape(node, maxColumns), remarks);
+    }
+    lastNode = node;
+  });
+  handleListItem(lastNode, null);
+
+  return { summary, remarks };
+}
+
+function _wrapInNode(tag, nodes, target, closingTag = null) {
+  if (nodes.length === 0)
+    return;
+
+  if (!closingTag)
+    closingTag = `/${tag}`;
+
+  if (nodes.length === 1) {
+    target.push(`<${tag}>${nodes[0]}<${closingTag}>`);
+    return;
+  }
+
+  target.push(`<${tag}>`);
+  target.push(...nodes);
+  target.push(`<${closingTag}>`);
+}
+
+/**
+ *
+ * @param {Documentation.MarkdownNode} node
+ */
+function _wrapAndEscape(node, maxColumns = 0) {
+  const lines = [];
+  const pushLine = text => {
+    if (text === '')
+      return;
+    text = text.trim();
+    lines.push(text);
+  };
+
+  const text = node.text.replace(/[^\[]`([^\]]*[^\[])`[^\]]/g, (m, g1) => ` <c>${g1}</c> `);
+  const words = text.split(' ');
+  let line = '';
+  for (let i = 0; i < words.length; i++) {
+    line = line + ' ' + words[i];
+    if (line.length >= maxColumns) {
+      pushLine(line);
+      line = '';
+    }
+  }
+
+  pushLine(line);
+  return lines;
+}
+
+/**
+ *
+ * @param {Documentation.MarkdownNode} node
+ */
+function _nodeShouldBeIgnored(node) {
+  if (!node
+    || (node.text === 'extends: [EventEmitter]'))
+    return true;
+
+  return false;
+}
+
+/**
+ * @param {Documentation.MarkdownNode[]} nodes
+ */
+function renderTextOnly(nodes, maxColumns = 80) {
+  const result = _innerRenderNodes(nodes, maxColumns, false);
+  return result.summary;
+}
+
+module.exports = { renderXmlDoc, renderTextOnly }