96 lines
2.5 KiB
JavaScript
96 lines
2.5 KiB
JavaScript
/*
|
|
Copyright 2012-2015, Yahoo Inc.
|
|
Copyrights licensed under the New BSD License. See the accompanying LICENSE file for terms.
|
|
*/
|
|
const INDENT = ' ';
|
|
|
|
/**
|
|
* a utility class to produce well-formed, indented XML
|
|
* @param {ContentWriter} contentWriter the content writer that this utility wraps
|
|
* @constructor
|
|
*/
|
|
function XMLWriter(contentWriter) {
|
|
this.cw = contentWriter;
|
|
this.stack = [];
|
|
}
|
|
|
|
function attrString(attrs) {
|
|
if (!attrs) {
|
|
return '';
|
|
}
|
|
const ret = [];
|
|
Object.keys(attrs).forEach(k => {
|
|
const v = attrs[k];
|
|
ret.push(k + '="' + v + '"');
|
|
});
|
|
return ret.length === 0 ? '' : ' ' + ret.join(' ');
|
|
}
|
|
|
|
XMLWriter.prototype.indent = function(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
|
|
*/
|
|
XMLWriter.prototype.openTag = function(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.
|
|
*/
|
|
XMLWriter.prototype.closeTag = function(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
|
|
*/
|
|
XMLWriter.prototype.inlineTag = function(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
|
|
*/
|
|
XMLWriter.prototype.closeAll = function() {
|
|
this.stack
|
|
.slice()
|
|
.reverse()
|
|
.forEach(name => {
|
|
this.closeTag(name);
|
|
});
|
|
};
|
|
|
|
module.exports = XMLWriter;
|