Embed

Embutir é uma maneira simples de incluir o aplicativo em seu site. Adicione o seguinte código ao seu site:

<iframe
  id="butterfly"
  src="https://web.butterfly.linwood.dev/embed"
  width="100%"
  height="500px"
  allowtransparency="true"
></iframe>

Opções

Alternativa	Tipo	Padrão	Descrição
guardar	Boolean (true, false)	true	Habilitar salvamento. Se desativado, somente um botão de saída será mostrado
editable	Boolean (true, false)	true	Habilitar edição. Se desativado, o documento será somente leitura
iDIOMA	String (…, sistema, usuário)	user	Idioma do documento. Se o sistema, o idioma será detectado do navegador. Se o usuário, o idioma será ajustado para as preferências de usuários

Messaging

The embed uses browser postMessage events. Send messages to the iframe with iframe.contentWindow.postMessage({ type, message }, origin). Butterfly sends messages back to the parent window with the same shape: { type: string, message?: unknown }.

See the embedding example for a live page that sends messages to the iframe and listens for messages from it.

<iframe
  id="butterfly"
  src="https://web.butterfly.linwood.dev/embed?save=true&editable=true"
  width="100%"
  height="500"
></iframe>

<script>
  const butterflyOrigin = 'https://web.butterfly.linwood.dev';
  const butterfly = document.querySelector('#butterfly');

  function sendToButterfly(type, message) {
    butterfly.contentWindow.postMessage({ type, message }, butterflyOrigin);
  }

  window.addEventListener('message', (event) => {
    if (
      event.origin !== butterflyOrigin ||
      event.source !== butterfly.contentWindow
    ) {
      return;
    }

    const { type, message } = event.data ?? {};

    if (type === 'save') {
      const documentBytes = Array.from(message);
      console.log('Save requested by the embed', documentBytes);
    }

    if (type === 'change') {
      console.log('Document changed', message);
    }

    if (type === 'getData') {
      console.log('Current document bytes', message);
    }

    if (type === 'render') {
      const image = new Image();
      image.src = `data:image/png;base64,${message}`;
      document.body.append(image);
    }
  });

  butterfly.addEventListener('load', () => {
    sendToButterfly('getData');

    sendToButterfly('render', {
      x: 0,
      y: 0,
      width: 600,
      height: 400,
      scale: 1,
      renderBackground: true,
    });
  });
</script>

To load document bytes into the embed, send an array of byte values:

sendToButterfly('setData', documentBytes);

Eventos

Listen for events with window.addEventListener('message', ...).

guardar

The save event is emitted when the user clicks the save button.

Parâmetros:

• message (Type List<int>): The data of the document.

sair

The exit event is emitted when the user clicks the exit button.

Parâmetros:

• message (Type List<int>): The data of the document.

change

The change event is emitted when the user changes the document.

Parâmetros:

• message (Type List<int>): The data of the document.

Métodos

Call methods with iframe.contentWindow.postMessage(...). Methods that return data send another message back with the same type.

getData

The getData method returns the data of the document.

Nenhum parâmetro. Returns: List<int>

setData

The setData method sets the data of the document.

Parâmetros:

• data (Type List<int>): The data of the document.

render

The render method renders the document to a png image.

Parâmetros:

• x (Type Number): The x position of the exported area.
• y (Type Number): The y position of the exported area.
• width (Type Number): The width of the image.
• height (Type Number): The height of the image.
• scale (Type Number): The scale of the image.
• renderBackground (Type Boolean): If true, the background will be rendered.

Returns: String (Base64 encoded image)

renderSVG

The renderSVG method renders the document to a svg image.

Parâmetros:

• x (Type Number): The x position of the exported area.
• y (Type Number): The y position of the exported area.
• width (Type Number): The width of the image.
• height (Type Number): The height of the image.
• renderBackground (Type Boolean): If true, the background will be rendered.

Returns: String (SVG)