FaberJS

Mason is an open source CSS Grid implementation. Unlike HTML element which can leverage power of CSS for Grid layouting, objects like SVG or custom objects cannot do that. Hence this library tries to solve that problem. For example we have have an object storing drawing information like dimensions and styles and then for laying itself in a parent container, Mason can be used.

Introduction to CSS Grid

CSS Grid Layout is one of the most powerful layout system available in CSS. It is a 2-dimensional system, meaning it can handle both columns and rows, unlike flexbox which is largely a 1-dimensional system. You work with Grid Layout by applying CSS rules both to a parent element (which becomes the Grid Container) and to that element's children (which become Grid Items).

For more details about CSS grids, refer to this awesome guide: https://css-tricks.com/snippets/css/complete-guide-grid/

Usage Guide

Installation

git clone git@github.com:fusioncharts/mason.git

npm install
npm start

Define a Grid with template and items

const parent = {
    style: {
        display: 'grid',
        height: 400,
        width: 500,
        gridTemplateColumns: '100 100',
        gridTemplateRows: '100 100',
        justifyItems: 'center',
        alignItems: 'center',
        paddingStart: 10,
        paddingEnd: 10,
        paddingTop: 10,
        paddingBottom: 10,
    }
};
const children = [
    {
        style: {
            width: 100,
            height: 100,
            gridColumnStart: 1,
            gridColumnEnd: 2,
            gridRowStart: 1,
            gridRowEnd: 2
        },
        layout: {}
    },
    {
        style: {
            width: 100,
            height: 100,
            gridColumnStart: 2,
            gridColumnEnd: 3,
            gridRowStart: 1,
            gridRowEnd: 2
        },
        layout: {}
    },
    {
        style: {
            width: 100,
            height: 100,
            gridColumnStart: 1,
            gridColumnEnd: 2,
            gridRowStart: 2,
            gridRowEnd: 3
        },
        layout: {}
    },
    {
        style: {
            width: 100,
            height: 100,
            gridColumnStart: 2,
            gridColumnEnd: 3,
            gridRowStart: 2,
            gridRowEnd: 3
        },
        layout: {}
    }
];

Compute layout

const layout = computeLayout({
    ...parent,
    children
})

/*
    {
    ...

    "children": [
        {
            "layout": {
                "x": 10,
                "y": 10,
                "x2": 110,
                "y2": 110,
                "width": 100,
                "height": 100
            }
        },
        {
            "layout": {
                "x": 110,
                "y": 10,
                "x2": 210,
                "y2": 110,
                "width": 100,
                "height": 100
            }
        },
        {
            "layout": {
                "x": 10,
                "y": 110,
                "x2": 110,
                "y2": 210,
                "width": 100,
                "height": 100
            }
        },
        {
            "layout": {
                "x": 110,
                "y": 110,
                "x2": 210,
                "y2": 210,
                "width": 100,
                "height": 100
            }
        }
    ]
}
*/

Structure of input

{
    style: {
        height: required,
        width: required,
        display: grid,
        gridTemplateColumns: 'space speparated track sizes',
        gridTemplateRows: 'space speparated track sizes'
    },
    children: [] // Array of grid items which will be laid out
}

Structure of output

{
    layout: {
        x,
        y,
        x2,
        y2
    },
}

Template with line names

gridTemplateColumns: '[col-1] 100 [col-2] 100'
gridTemplateRows: '[row-1] 100 [row-2] 100'

Alignments

Standard justification and alignment properties are supported, like justifyItems, alignItems, justifySelf, alignSelf

Contribution Guide

Refer the https://www.github.com/fusioncharts/mason/blob/develop/contributing.md contributing.md for more details

sandeep1995/faberjs