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qwen/nodejs/node_modules/istanbul-lib-report/lib/xml-writer.js

@@ -0,0 +1,90 @@
+'use strict';
+/*
+ Copyright 2012-2015, Yahoo Inc.
+ Copyrights licensed under the New BSD License. See the accompanying LICENSE file for terms.
+ */
+const INDENT = '  ';
+
+function attrString(attrs) {
+    return Object.entries(attrs || {})
+        .map(([k, v]) => ` ${k}="${v}"`)
+        .join('');
+}
+
+/**
+ * a utility class to produce well-formed, indented XML
+ * @param {ContentWriter} contentWriter the content writer that this utility wraps
+ * @constructor
+ */
+class XMLWriter {
+    constructor(contentWriter) {
+        this.cw = contentWriter;
+        this.stack = [];
+    }
+
+    indent(str) {
+        return this.stack.map(() => INDENT).join('') + str;
+    }
+
+    /**
+     * writes the opening XML tag with the supplied attributes
+     * @param {String} name tag name
+     * @param {Object} [attrs=null] attrs attributes for the tag
+     */
+    openTag(name, attrs) {
+        const str = this.indent(`<${name + attrString(attrs)}>`);
+        this.cw.println(str);
+        this.stack.push(name);
+    }
+
+    /**
+     * closes an open XML tag.
+     * @param {String} name - tag name to close. This must match the writer's
+     *  notion of the tag that is currently open.
+     */
+    closeTag(name) {
+        if (this.stack.length === 0) {
+            throw new Error(`Attempt to close tag ${name} when not opened`);
+        }
+        const stashed = this.stack.pop();
+        const str = `</${name}>`;
+
+        if (stashed !== name) {
+            throw new Error(
+                `Attempt to close tag ${name} when ${stashed} was the one open`
+            );
+        }
+        this.cw.println(this.indent(str));
+    }
+
+    /**
+     * writes a tag and its value opening and closing it at the same time
+     * @param {String} name tag name
+     * @param {Object} [attrs=null] attrs tag attributes
+     * @param {String} [content=null] content optional tag content
+     */
+    inlineTag(name, attrs, content) {
+        let str = '<' + name + attrString(attrs);
+        if (content) {
+            str += `>${content}</${name}>`;
+        } else {
+            str += '/>';
+        }
+        str = this.indent(str);
+        this.cw.println(str);
+    }
+
+    /**
+     * closes all open tags and ends the document
+     */
+    closeAll() {
+        this.stack
+            .slice()
+            .reverse()
+            .forEach(name => {
+                this.closeTag(name);
+            });
+    }
+}
+
+module.exports = XMLWriter;