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* | ||
# npmignore | ||
!src/lib/**/* |
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MIT License | ||
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Copyright (c) [year] [fullname] | ||
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Permission is hereby granted, free of charge, to any person obtaining a copy | ||
of this software and associated documentation files (the "Software"), to deal | ||
in the Software without restriction, including without limitation the rights | ||
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
copies of the Software, and to permit persons to whom the Software is | ||
furnished to do so, subject to the following conditions: | ||
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The above copyright notice and this permission notice shall be included in all | ||
copies or substantial portions of the Software. | ||
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
SOFTWARE. |
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This is a [Next.js](https://nextjs.org/) project bootstrapped with [`create-next-app`](https://github.com/vercel/next.js/tree/canary/packages/create-next-app). | ||
# react-konva-to-svg | ||
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## Getting Started | ||
**Extend Konva's functionality to export stages as SVG. Enhance the quality of exported images with SVG format.** | ||
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First, run the development server: | ||
[![GitHub License](https://img.shields.io/github/license/dendrofen/react-konva-to-svg)](LICENSE) | ||
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```bash | ||
npm run dev | ||
# or | ||
yarn dev | ||
# or | ||
pnpm dev | ||
``` | ||
## Features | ||
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- Export Konva stages to SVG format. | ||
- Asynchronous export with progress tracking. | ||
- Before and after export callbacks for custom processing. | ||
- Flexible context with a function that handles Konva stage objects. | ||
- Export results as text SVG or Blob SVG. | ||
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## Table of Contents | ||
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- [Installation](#installation) | ||
- [Usage](#usage) | ||
- [Example](#example) | ||
- [Demo](#demo) | ||
- [Contributing](#contributing) | ||
- [License](#license) | ||
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Open [http://localhost:3000](http://localhost:3000) with your browser to see the result. | ||
## Installation | ||
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You can start editing the page by modifying `app/page.js`. The page auto-updates as you edit the file. | ||
You can install `react-konva-to-svg` using npm, yarn, or directly from GitHub. | ||
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This project uses [`next/font`](https://nextjs.org/docs/basic-features/font-optimization) to automatically optimize and load Inter, a custom Google Font. | ||
- **npm**: `npm install react-konva-to-svg` | ||
- **yarn**: `yarn add react-konva-to-svg` | ||
- **GitHub**: [GitHub Repository](https://github.com/dendrofen/react-konva-to-svg) | ||
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## Learn More | ||
## Usage | ||
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To learn more about Next.js, take a look at the following resources: | ||
To use `react-konva-to-svg`, import the library and utilize the `exportStageSVG` function with your Konva stage object. This function allows you to customize the export process. | ||
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- [Next.js Documentation](https://nextjs.org/docs) - learn about Next.js features and API. | ||
- [Learn Next.js](https://nextjs.org/learn) - an interactive Next.js tutorial. | ||
### `exportStageSVG(stage, blob, options)` | ||
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You can check out [the Next.js GitHub repository](https://github.com/vercel/next.js/) - your feedback and contributions are welcome! | ||
- `stage`: The Konva stage object you want to export. | ||
- `blob` (optional): Set to `true` to export as Blob SVG, or `false` (default) to export as text SVG. | ||
- `options` (optional): An object containing the following callbacks: | ||
- `onBefore`: A callback function called before export. Receives an array `[stage, layer]` as an argument. | ||
- `onAfter`: A callback function called after export. Receives an array `[stage, layer]` as an argument. | ||
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## Deploy on Vercel | ||
**Example usage:** | ||
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```javascript | ||
import { exportStageSVG } from 'react-konva-to-svg'; | ||
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// Example usage | ||
const stage = /* your Konva stage */; | ||
const result = await exportStageSVG(stage, false, { | ||
onBefore: ([stage, layer]) => { | ||
// Perform actions before export | ||
}, | ||
onAfter: ([stage, layer]) => { | ||
// Perform actions after export | ||
}, | ||
}); | ||
``` | ||
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The easiest way to deploy your Next.js app is to use the [Vercel Platform](https://vercel.com/new?utm_medium=default-template&filter=next.js&utm_source=create-next-app&utm_campaign=create-next-app-readme) from the creators of Next.js. | ||
## Demo | ||
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Check out our [Next.js deployment documentation](https://nextjs.org/docs/deployment) for more details. | ||
Explore a live demo of react-konva-to-svg in action: [Demo](https://dendrofen.github.io/react-konva-to-svg/) |
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{ | ||
"name": "react-konva-to-svg", | ||
"version": "0.1.0", | ||
"version": "1.0.0", | ||
"private": false, | ||
"keywords": [ | ||
"react-konva", | ||
"react-konva-components", | ||
"react-konva-utils", | ||
"react-konva-export", | ||
"canvas-api", | ||
"svg-canvas", | ||
"react-konva-to-svg", | ||
"canvas", | ||
"svg", | ||
"konva" | ||
], | ||
"description": "Extend Konva's functionality to export stages as SVG. Enhance the quality of exported images with SVG format.", | ||
"author": "dendrofen", | ||
"license": "MIT", | ||
"repository": { | ||
"type": "git", | ||
"url": "git+https://github.com/dendrofen/react-konva-to-svg.git" | ||
}, | ||
"homepage": "https://dendrofen.github.io/react-konva-to-svg/", | ||
"scripts": { | ||
"dev": "next dev", | ||
"build": "next build", | ||
"start": "next start", | ||
"lint": "next lint" | ||
}, | ||
"dependencies": { | ||
"react": "^18.2.0", | ||
"konva": "^9.2.0", | ||
"react-konva": "^18.2.10", | ||
"svgcanvas": "^2.5.0" | ||
}, | ||
"devDependencies": { | ||
"eslint": "8.46.0", | ||
"eslint-config-next": "13.4.13", | ||
"konva": "^9.2.0", | ||
"next": "13.4.13", | ||
"react": "18.2.0", | ||
"react": "^18.2.0", | ||
"react-dom": "18.2.0", | ||
"react-konva": "^18.2.10", | ||
"svgcanvas": "^2.5.0" | ||
} | ||
} | ||
} |
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import { Context } from "svgcanvas"; | ||
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/** | ||
* Asynchronously sleeps for a specified time. | ||
* @param {number} time - The time to sleep in milliseconds. | ||
* @returns {Promise<void>} A Promise that resolves after sleeping. | ||
*/ | ||
export const sleep = async (time) => new Promise(resolve => setTimeout(resolve, time)); | ||
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/** | ||
* Exports the SVG representation of a Konva stage. | ||
* @param {Stage} stage - The Konva stage to export. | ||
* @param {boolean} [blob=false] - Whether to return a Blob object instead of a string. | ||
* @param {Object} [options] - Additional options. | ||
* @param {Function} [options.onBefore] - A callback function to execute before exporting. | ||
* @param {Function} [options.onAfter] - A callback function to execute after exporting. | ||
* @returns {string|Blob} The SVG data or a Blob object. | ||
*/ | ||
export async function exportStageSVG(stage, blob = false, { onBefore, onAfter } = {}) { | ||
// Get the first layer of the stage | ||
const layer = stage.getLayers()[0]; | ||
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// Call the 'onBefore' callback function if provided, passing in the stage and layer | ||
onBefore && onBefore([stage, layer]); | ||
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// Asynchronously sleep for 200 milliseconds | ||
await sleep(200); | ||
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// Create a new context for rendering the SVG | ||
const oldContext = layer.canvas.context._context; | ||
const c2s = layer.canvas.context._context = new Context({ | ||
height: stage.height(), | ||
width: stage.width(), | ||
ctx: oldContext | ||
}); | ||
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// Draw the stage on the new context | ||
stage.draw(); | ||
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// Get the serialized SVG data | ||
let out = c2s.getSerializedSvg(); | ||
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// If 'blob' is true, create a Blob object with the SVG data and specify the MIME type | ||
out = blob ? new Blob([out], { type: "image/svg+xml;charset=utf-8" }) : out; | ||
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// Restore the original context | ||
layer.canvas.context._context = oldContext; | ||
onAfter && onAfter([stage, layer]) | ||
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// Call the 'onAfter' callback function if provided, passing in the stage and layer | ||
onAfter && onAfter([stage, layer]); | ||
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// Asynchronously sleep for 200 milliseconds | ||
await sleep(200); | ||
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// Redraw the stage | ||
stage.draw(); | ||
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// Return the SVG data or Blob object | ||
return out; | ||
} | ||
} |