React Konva Rich Text Editor

A rich-text editor for React Konva, providing seamless integration of text editing capabilities on a canvas. This library allows you to manipulate text on a canvas, similar to tools like Microsoft Word, but within the powerful canvas rendering context provided by React-Konva.

Table of Contents

• Installation
• Features
• Components
  • Editors
    • InlineEditor
    • InternalEditor
    • ExternalEditor
  • Images
    • Image.Inline
    • Image.Internal
    • Image.External
• Usage
  • Inline Editor Example
  • Internal Editor Example
  • External Editor Example
• API Reference

Installation

npm install react-konva-rich-text-editor

or

yarn add react-konva-rich-text-editor

Features

• Rich Text Editing: Leverage the power of TipTap to provide rich-text editing capabilities.
• Canvas Integration: Seamlessly integrate text editing within a React Konva canvas.
• Flexible Editors: Choose between Inline, Internal, or External editors to suit your application's needs.
• Customizable: Easily customize editor styles, toolbar options, and more.

Components

This library provides six main components:

Editors

1. InlineEditor: Appears inline when you double-click the text image on the canvas, giving the illusion of editing the text directly.
2. InternalEditor: Pops up over the canvas when you double-click the text image.
3. ExternalEditor: Always visible and edits the text image from outside the canvas.

Images

Corresponding to each editor, there is an image component:

1. Image.Inline: Renders the text as an image on the canvas and interacts with the InlineEditor.
2. Image.Internal: Works with the InternalEditor.
3. Image.External: Works with the ExternalEditor.

Usage

Inline Editor Example

View the Inline Editor example on StackBlitz

import { useState } from 'react';
import Image, { InlineEditor } from 'react-konva-rich-text-editor';
import type { InlineEditorEl } from 'react-konva-rich-text-editor';
import { Stage, Layer } from 'react-konva';
import Konva from 'konva';

function App() {
  const [editorEl, setEditorEl] = useState<InlineEditorEl>({
    x: 110,
    y: 110,
    width: 720,
    height: 360,
    open: false, // Required for InlineEditor
    fontSize: 66,
  });
  const [svgImage, setSvgImage] = useState('');

  const handleDragEnd = (e: Konva.KonvaEventObject<DragEvent>) => {
    const { x, y } = e.target.position();
    setEditorEl((prev) => ({
      ...prev,
      x,
      y,
    }));
  };

  return (
    <>
      <Stage width={window.innerWidth} height={window.innerHeight}>
        <Layer>
          <Image.Inline
            svgImage={svgImage}
            setEditorEl={setEditorEl}
            editorEl={editorEl}
            x={editorEl.x}
            y={editorEl.y}
            draggable
            onDragEnd={handleDragEnd}
          />
        </Layer>
      </Stage>
      <InlineEditor
        initialText="Hello, world!"
        setSvgImage={setSvgImage}
        setEditorEl={setEditorEl}
        editorEl={editorEl}
        editorStyle={{}}
      />
    </>
  );
}

export default App;

Internal Editor Example

View the Internal Editor example on StackBlitz

import { useState } from 'react';
import Image, { InternalEditor } from 'react-konva-rich-text-editor';
import type { InternalEditorEl } from 'react-konva-rich-text-editor';
import { Stage, Layer } from 'react-konva';
import Konva from 'konva';

function App() {
  const [editorEl, setEditorEl] = useState<InternalEditorEl>({
    x: 100,
    y: 100,
    width: 600,
    height: 300,
    open: false, // Required for InternalEditor
    fontSize: 48,
  });
  const [svgImage, setSvgImage] = useState('');

  const handleDragEnd = (e: Konva.KonvaEventObject<DragEvent>) => {
    const { x, y } = e.target.position();
    setEditorEl((prev) => ({
      ...prev,
      x,
      y,
    }));
  };

  return (
    <>
      <Stage width={window.innerWidth} height={window.innerHeight}>
        <Layer>
          <Image.Internal
            svgImage={svgImage}
            setEditorEl={setEditorEl}
            editorEl={editorEl}
            x={editorEl.x}
            y={editorEl.y}
            draggable
            onDragEnd={handleDragEnd}
          />
        </Layer>
      </Stage>
      <InternalEditor
        initialText="Edit me!"
        setSvgImage={setSvgImage}
        setEditorEl={setEditorEl}
        editorEl={editorEl}
        editorStyle={{}}
      />
    </>
  );
}

export default App;

External Editor Example

View the External Editor example on StackBlitz

import { useState } from 'react';
import Image, { ExternalEditor } from 'react-konva-rich-text-editor';
import type { ExternalEditorEl } from 'react-konva-rich-text-editor';
import { Stage, Layer } from 'react-konva';

function App() {
  const [editorEl, setEditorEl] = useState<ExternalEditorEl>({
    x: 50,
    y: 50,
    width: 500,
    height: 250,
    fontSize: 36,
  });
  const [svgImage, setSvgImage] = useState('');

  return (
    <>
      <Stage width={window.innerWidth} height={window.innerHeight}>
        <Layer>
          <Image.External
            svgImage={svgImage}
            x={editorEl.x}
            y={editorEl.y}
            draggable
          />
        </Layer>
      </Stage>
      <ExternalEditor
        initialText="Always editable"
        setSvgImage={setSvgImage}
        editorEl={editorEl}
        editorStyle={{}}
      />
    </>
  );
}

export default App;

API Reference

Editors

InlineEditor

• Description: An editor that appears inline when you double-click the corresponding image on the canvas.
• Props:
  • initialText (string): The initial text content.
  • editorEl (InlineEditorEl): Editor state object.
  • setEditorEl (function): State updater for editorEl.
  • setSvgImage (function): Function to update the SVG image.
  • editorStyle (object): Custom styles for the editor.
  • toolbarOptions (array): Customize toolbar options.

InternalEditor

• Description: An editor that pops up over the canvas when you double-click the corresponding image.
• Props: Same as InlineEditor.

ExternalEditor

• Description: An editor that is always visible and edits the text image from outside the canvas.
• Props:
  • initialText (string): The initial text content.
  • editorEl (ExternalEditorEl): Editor state object.
  • setSvgImage (function): Function to update the SVG image.
  • editorStyle (object): Custom styles for the editor.
  • toolbarOptions (array): Customize toolbar options.

Images

Image.Inline

• Description: Corresponds to InlineEditor. Renders the text as an image on the canvas.
• Props:
  • svgImage (string): The SVG image source.
  • editorEl (InlineEditorEl): Editor state object.
  • setEditorEl (function): State updater for editorEl.
  • x, y (number): Position on the canvas.
  • Additional Konva Image props.

Image.Internal

• Description: Corresponds to InternalEditor.
• Props: Same as Image.Inline.

Image.External

• Description: Corresponds to ExternalEditor.
• Props:
  • svgImage (string): The SVG image source.
  • x, y (number): Position on the canvas.
  • Additional Konva Image props.

Types

InlineEditorEl & InternalEditorEl

• Properties:
  • x, y (number): Position on the canvas.
  • width, height (number): Dimensions of the editor.
  • open (boolean): Controls the visibility of the editor.
  • fontSize (number, optional): Font size for the text.

ExternalEditorEl

• Properties:
  • x, y (number): Position on the canvas.
  • width, height (number): Dimensions of the editor.
  • fontSize (number, optional): Font size for the text.

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Feel free to contribute to this project by submitting issues or pull requests on GitHub.