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canvas-native

v2.4.3

Published

Utilities for working with the native Canvas format

Downloads

23

Readme

Canvas Native Circle CI

Canvas Native is a set of utilities for parsing and converting between the native Canvas format and other formats.

Usage

Install canvas-native from npm:

npm i --save canvas-native

Parsing

A canvas can be parsed from its native text form into an array of objects that can then be converted into other formats:

import { parse } from 'canvas-native/lib/parser';
parse(myCanvasString);

Formatting

A parsed canvas can be converted into other formats. The available formatters can be found in lib/formatters:

import format      from 'canvas-native/lib/formatters/markdown';
import { parse   } from 'canvas-native/lib/parser';

const parsed   = parse(myCanvasString);
const markdown = format(parsed);

Creating Types

To create a new type, create a subclass of lib/types/type and add the missing getters and methods (see that file for latest format):

// lib/types/my-type.js

import Type     from './type';
import { wrap } from '../brackets';

export default class MyType extends Type {
  toMarkdown(/* prevLine, nextLine */) {
    return 'My type as Markdown';
  }

  static get name() {
    return 'my-type';
  }

  static get pattern() {
    return new RegExp(`^${wrap('my-type')}(.*)$`);
  }
}

Prefixed Lines

In the above example, we make use of the wrap function exported from lib/brackets. That function wraps a given string in the special brackets used for parsing some lines in the Canvas native format.