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'use strict';
var defaultTreeAdapter = require('../tree_adapters/default'),
mergeOptions = require('../utils/merge_options'),
doctype = require('../common/doctype'),
HTML = require('../common/html');
//Aliases
var $ = HTML.TAG_NAMES,
NS = HTML.NAMESPACES;
//Default serializer options
var DEFAULT_OPTIONS = {
treeAdapter: defaultTreeAdapter
};
//Escaping regexes
var AMP_REGEX = /&/g,
NBSP_REGEX = /\u00a0/g,
DOUBLE_QUOTE_REGEX = /"/g,
LT_REGEX = /</g,
GT_REGEX = />/g;
//Serializer
var Serializer = module.exports = function (node, options) {
this.options = mergeOptions(DEFAULT_OPTIONS, options);
this.treeAdapter = this.options.treeAdapter;
this.html = '';
this.startNode = node;
};
// NOTE: exported as static method for the testing purposes
Serializer.escapeString = function (str, attrMode) {
str = str
.replace(AMP_REGEX, '&')
.replace(NBSP_REGEX, ' ');
if (attrMode)
str = str.replace(DOUBLE_QUOTE_REGEX, '"');
else {
str = str
.replace(LT_REGEX, '<')
.replace(GT_REGEX, '>');
}
return str;
};
//API
Serializer.prototype.serialize = function () {
this._serializeChildNodes(this.startNode);
return this.html;
};
//Internals
Serializer.prototype._serializeChildNodes = function (parentNode) {
var childNodes = this.treeAdapter.getChildNodes(parentNode);
if (childNodes) {
for (var i = 0, cnLength = childNodes.length; i < cnLength; i++) {
var currentNode = childNodes[i];
if (this.treeAdapter.isElementNode(currentNode))
this._serializeElement(currentNode);
else if (this.treeAdapter.isTextNode(currentNode))
this._serializeTextNode(currentNode);
else if (this.treeAdapter.isCommentNode(currentNode))
this._serializeCommentNode(currentNode);
else if (this.treeAdapter.isDocumentTypeNode(currentNode))
this._serializeDocumentTypeNode(currentNode);
}
}
};
Serializer.prototype._serializeElement = function (node) {
var tn = this.treeAdapter.getTagName(node),
ns = this.treeAdapter.getNamespaceURI(node);
this.html += '<' + tn;
this._serializeAttributes(node);
this.html += '>';
if (tn !== $.AREA && tn !== $.BASE && tn !== $.BASEFONT && tn !== $.BGSOUND && tn !== $.BR && tn !== $.BR &&
tn !== $.COL && tn !== $.EMBED && tn !== $.FRAME && tn !== $.HR && tn !== $.IMG && tn !== $.INPUT &&
tn !== $.KEYGEN && tn !== $.LINK && tn !== $.MENUITEM && tn !== $.META && tn !== $.PARAM && tn !== $.SOURCE &&
tn !== $.TRACK && tn !== $.WBR) {
var childNodesHolder = tn === $.TEMPLATE && ns === NS.HTML ?
this.treeAdapter.getTemplateContent(node) :
node;
this._serializeChildNodes(childNodesHolder);
this.html += '</' + tn + '>';
}
};
Serializer.prototype._serializeAttributes = function (node) {
var attrs = this.treeAdapter.getAttrList(node);
for (var i = 0, attrsLength = attrs.length; i < attrsLength; i++) {
var attr = attrs[i],
value = Serializer.escapeString(attr.value, true);
this.html += ' ';
if (!attr.namespace)
this.html += attr.name;
else if (attr.namespace === NS.XML)
this.html += 'xml:' + attr.name;
else if (attr.namespace === NS.XMLNS) {
if (attr.name !== 'xmlns')
this.html += 'xmlns:';
this.html += attr.name;
}
else if (attr.namespace === NS.XLINK)
this.html += 'xlink:' + attr.name;
else
this.html += attr.namespace + ':' + attr.name;
this.html += '="' + value + '"';
}
};
Serializer.prototype._serializeTextNode = function (node) {
var content = this.treeAdapter.getTextNodeContent(node),
parent = this.treeAdapter.getParentNode(node),
parentTn = void 0;
if (parent && this.treeAdapter.isElementNode(parent))
parentTn = this.treeAdapter.getTagName(parent);
if (parentTn === $.STYLE || parentTn === $.SCRIPT || parentTn === $.XMP || parentTn === $.IFRAME ||
parentTn === $.NOEMBED || parentTn === $.NOFRAMES || parentTn === $.PLAINTEXT || parentTn === $.NOSCRIPT)
this.html += content;
else
this.html += Serializer.escapeString(content, false);
};
Serializer.prototype._serializeCommentNode = function (node) {
this.html += '<!--' + this.treeAdapter.getCommentNodeContent(node) + '-->';
};
Serializer.prototype._serializeDocumentTypeNode = function (node) {
var name = this.treeAdapter.getDocumentTypeNodeName(node);
this.html += '<' + doctype.serializeContent(name, null, null) + '>';
};
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