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112 lines
1.9 KiB
112 lines
1.9 KiB
'use strict';
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var Node = require('./node');
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/**
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* Initialize a new `Block` with an optional `node`.
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*
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* @param {Node} node
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* @api public
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*/
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var Block = module.exports = function Block(node){
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this.nodes = [];
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if (node) this.push(node);
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};
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// Inherit from `Node`.
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Block.prototype = Object.create(Node.prototype);
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Block.prototype.constructor = Block;
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Block.prototype.type = 'Block';
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/**
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* Block flag.
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*/
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Block.prototype.isBlock = true;
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/**
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* Replace the nodes in `other` with the nodes
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* in `this` block.
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*
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* @param {Block} other
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* @api private
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*/
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Block.prototype.replace = function(other){
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other.nodes = this.nodes;
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};
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/**
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* Pust the given `node`.
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*
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* @param {Node} node
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* @return {Number}
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* @api public
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*/
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Block.prototype.push = function(node){
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return this.nodes.push(node);
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};
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/**
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* Check if this block is empty.
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*
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* @return {Boolean}
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* @api public
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*/
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Block.prototype.isEmpty = function(){
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return 0 == this.nodes.length;
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};
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/**
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* Unshift the given `node`.
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*
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* @param {Node} node
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* @return {Number}
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* @api public
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*/
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Block.prototype.unshift = function(node){
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return this.nodes.unshift(node);
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};
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/**
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* Return the "last" block, or the first `yield` node.
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*
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* @return {Block}
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* @api private
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*/
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Block.prototype.includeBlock = function(){
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var ret = this
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, node;
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for (var i = 0, len = this.nodes.length; i < len; ++i) {
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node = this.nodes[i];
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if (node.yield) return node;
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else if (node.textOnly) continue;
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else if (node.includeBlock) ret = node.includeBlock();
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else if (node.block && !node.block.isEmpty()) ret = node.block.includeBlock();
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if (ret.yield) return ret;
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}
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return ret;
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};
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/**
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* Return a clone of this block.
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*
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* @return {Block}
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* @api private
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*/
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Block.prototype.clone = function(){
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var clone = new Block;
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for (var i = 0, len = this.nodes.length; i < len; ++i) {
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clone.push(this.nodes[i].clone());
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}
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return clone;
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};
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