varentsov/draftjs_exporter

Export Draft.js content state into HTML.

Draft.js Exporter

Draft.js is a framework for building rich text editors. However, it does not support exporting documents at HTML. This gem is designed to take the raw ContentState (output of convertToRaw) from Draft.js and convert it to HTML using Ruby.

Usage

# Create configuration for entities and styles
config = {
  entity_decorators: {
    'LINK' => DraftjsExporter::Entities::Link.new(className: 'link')
  },
  block_map: {
    'header-one' => { element: 'h1' },
    'unordered-list-item' => {
      element: 'li',
      wrapper: ['ul', { className: 'public-DraftStyleDefault-ul' }]
    },
    'unstyled' => { element: 'div' }
  },
  style_map: {
    'ITALIC' => { fontStyle: 'italic' }
  }
}

# New up the exporter
exporter = DraftjsExporter::HTML.new(config)

# Provide raw content state
exporter.call({
  entityMap: {
    '0' => {
      type: 'LINK',
      mutability: 'MUTABLE',
      data: {
        url: 'http://example.com'
      }
    }
  },
  blocks: [
    {
      key: '5s7g9',
      text: 'Header',
      type: 'header-one',
      depth: 0,
      inlineStyleRanges: [],
      entityRanges: []
    },
    {
      key: 'dem5p',
      text: 'some paragraph text',
      type: 'unstyled',
      depth: 0,
      inlineStyleRanges: [
        {
          offset: 0,
          length: 4,
          style: 'ITALIC'
        }
      ],
      entityRanges: [
        {
          offset: 5,
          length: 9,
          key: 0
        }
      ]
    }
  ]
})
# => "<h1>Header</h1><div>\n<span style=\"font-style: italic;\">some</span> <a href=\"http://example.com\" class=\"link\">paragraph</a> text</div>"

Default values

Use config specified in default keys if it finds unknown entity_decorators, block_map or style_map

config = {
  entity_decorators: {
    'default' => DraftjsExporter::Entities::Link.new(className: 'link')
  },
  block_map: {
    'default' => { element: 'h1' },
  },
  style_map: {
    'default' => { fontStyle: 'default' }
  }
}

exporter = DraftjsExporter::HTML.new(config)

exporter.call({
  entityMap: {
    '0' => {
      type: 'LINK',
      mutability: 'MUTABLE',
      data: {
        url: 'http://example.com'
      }
    }
  },
  blocks: [
    {
      key: '5s7g9',
      text: 'Header',
      type: 'header-one',
      depth: 0,
      inlineStyleRanges: [],
      entityRanges: []
    },
    {
      key: 'dem5p',
      text: 'some paragraph text',
      type: 'unstyled',
      depth: 0,
      inlineStyleRanges: [
        {
          offset: 0,
          length: 4,
          style: 'ITALIC'
        }
      ],
      entityRanges: [
        {
          offset: 5,
          length: 9,
          key: 0
        }
      ]
    }
  ]
})
# => "<h1>Header</h1><div>\n<span style=\"font-style: default;\">some</span> <a href=\"http://example.com\" class=\"link\">paragraph</a> text</div>"

To see messages about missing properties when 'default' properties are used, define logger:

DraftjsExporter.logger = Logger.new(STDOUT)

Specify custom element for style, different to span

config = {
  entity_decorators: {
    'LINK' => DraftjsExporter::Entities::Link.new(className: 'link')
  },
  block_map: {
    'header-one' => { element: 'h1' },
    'unordered-list-item' => {
      element: 'li',
      wrapper: ['ul', { className: 'public-DraftStyleDefault-ul' }]
    },
    'unstyled' => { element: 'div' }
  },
  style_map: {
    'ITALIC' => { fontStyle: 'italic', element: 'i' }
  }
}

exporter = DraftjsExporter::HTML.new(config)

exporter.call({
  entityMap: {
    '0' => {
      type: 'LINK',
      mutability: 'MUTABLE',
      data: {
        url: 'http://example.com'
      }
    }
  },
  blocks: [
    {
      key: '5s7g9',
      text: 'Header',
      type: 'header-one',
      depth: 0,
      inlineStyleRanges: [],
      entityRanges: []
    },
    {
      key: 'dem5p',
      text: 'some paragraph text',
      type: 'unstyled',
      depth: 0,
      inlineStyleRanges: [
        {
          offset: 0,
          length: 4,
          style: 'ITALIC'
        }
      ],
      entityRanges: [
        {
          offset: 5,
          length: 9,
          key: 0
        }
      ]
    }
  ]
})
# => "<h1>Header</h1><div>\n<i style=\"font-style: italic;\">some</i> <a href=\"http://example.com\" class=\"link\">paragraph</a> text</div>"

Tests

$ rspec