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