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Organize and layout items based on various algorithms

Getting Started

Install the module with: npm install layout

// Load in layout 
var layout = require('layout');
// Generate a new layer to organize items on 
var layer = layout('top-down');
// Add items that you want to organize 
layer.addItem({'height': 20, 'width': 10, 'meta': 'medium'});
layer.addItem({'height': 10, 'width': 10, 'meta': 'small'});
layer.addItem({'height': 50, 'width': 40, 'meta': 'large'});
// Export the info 
var info = layer['export']();
// We get back the width and height of the pack as well as organized items 
    height: 80,
    width: 40,
    items: [{
        height: 10,
        width: 10,
        meta: 'small',
        x: 0,
        y: 0
    }, {
        height: 20,
        width: 10,
        meta: 'medium',
        x: 0,
        y: 10
    }, {
        height: 50,
        width: 40,
        meta: 'large',
        x: 0,
        y: 30


Layout is a constructor function

 * Layout adds items in an algorithmic fashion
 * @constructor
 * @param {String|Function} [algorithm="top-down"] Name of algorithm or custom algorithm to use
 * Algorithms available: top-down, left-right, diagonal, alt-diagonal

Items can be added via addItem which are required to have a height and width. Any additional info should be stored inside of meta.

 * @param {Object} item Item to store -- this currently is mutated in-memory
 * @param {Number} item.width Width of the item
 * @param {Number} item.height Height of the item
 * @param {Mixed} [item.meta] Any meta data you would like to store related to the item

export is how you take your items and organize them.

 * @returns {Object} retObj 
 * @returns {Number} retObj.height Height of the processed layout
 * @returns {Number} retObj.width Width of the processed layout
 * @returns {Mixed[]} retObj.items Organized items

Custom algorithms

You can add your own algorithm via layout.addAlgorithm

 * Method to add new algorithms via
 * @param {String} name Name of algorithm
 * @param {Function} algorithm Algorithm to bind under name


In lieu of a formal styleguide, take care to maintain the existing coding style. Add unit tests for any new or changed functionality. Lint and test your code using grunt.


Copyright (c) 2012 Todd Wolfson Licensed under the MIT license.