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/*!
* Jade - nodes - Tag
* Copyright(c) 2010 TJ Holowaychuk <tj@vision-media.ca>
* MIT Licensed
*/
/**
* Module dependencies.
*/
var Attrs = require('./attrs'),
Block = require('./block'),
inlineTags = require('../inline-tags');
/**
* Initialize a `Tag` node with the given tag `name` and optional `block`.
*
* @param {String} name
* @param {Block} block
* @api public
*/
var Tag = module.exports = function Tag(name, block) {
this.name = name;
this.attrs = [];
this.block = block || new Block;
};
/**
* Inherit from `Attrs`.
*/
Tag.prototype.__proto__ = Attrs.prototype;
/**
* Clone this tag.
*
* @return {Tag}
* @api private
*/
Tag.prototype.clone = function(){
var clone = new Tag(this.name, this.block.clone());
clone.line = this.line;
clone.attrs = this.attrs;
clone.textOnly = this.textOnly;
return clone;
};
/**
* Check if this tag is an inline tag.
*
* @return {Boolean}
* @api private
*/
Tag.prototype.isInline = function(){
return ~inlineTags.indexOf(this.name);
};
/**
* Check if this tag's contents can be inlined. Used for pretty printing.
*
* @return {Boolean}
* @api private
*/
Tag.prototype.canInline = function(){
var nodes = this.block.nodes;
function isInline(node){
// Recurse if the node is a block
if (node.isBlock) return node.nodes.every(isInline);
return node.isText || (node.isInline && node.isInline());
}
// Empty tag
if (!nodes.length) return true;
// Text-only or inline-only tag
if (1 == nodes.length) return isInline(nodes[0]);
// Multi-line inline-only tag
if (this.block.nodes.every(isInline)) {
for (var i = 1, len = nodes.length; i < len; ++i) {
if (nodes[i-1].isText && nodes[i].isText)
return false;
}
return true;
}
// Mixed tag
return false;
};
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