Cropper.js

/*Copyright (C) 2019 Centro de Computacao Cientifica e Software Livre
Departamento de Informatica - Universidade Federal do Parana

This file is part of Plataforma Integrada MEC.

Plataforma Integrada MEC is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

Plataforma Integrada MEC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Affero General Public License for more details.

You should have received a copy of the GNU Affero General Public License
along with Plataforma Integrada MEC.  If not, see <http://www.gnu.org/licenses/>.*/

import React, { PureComponent } from 'react';
import ReactCrop from 'react-image-crop';
import 'react-image-crop/dist/ReactCrop.css';


export default class Cropper extends PureComponent {
  state = {
    src: this.props.src,
    crop:this.props.crop
  };


  // If you setState the crop in here you should return false.
  onImageLoaded = image => {
    this.imageRef = image;
  };

  onCropComplete = crop => {
    this.makeClientCrop(crop);
  };

  onCropChange = (crop, percentCrop) => {
    // You could also use percentCrop:
    // this.setState({ crop: percentCrop });
    this.setState({ crop });
  };

  async makeClientCrop(crop) {
    if (this.imageRef && crop.width && crop.height) {
      // eslint-disable-next-line
      const croppedImageUrl = await this.getCroppedImg(
        this.imageRef,
        crop,
        'newFile.jpeg'
      );


    }
  }



  getCroppedImg(image, crop, fileName) {
    const canvas = document.createElement('canvas');
    const scaleX = image.naturalWidth / image.width;
    const scaleY = image.naturalHeight / image.height;
    canvas.width = crop.width;
    canvas.height = crop.height;
    const ctx = canvas.getContext('2d');

    ctx.drawImage(
      image,
      crop.x * scaleX,
      crop.y * scaleY,
      crop.width * scaleX,
      crop.height * scaleY,
      0,
      0,
      crop.width,
      crop.height
    );
    const reader = new FileReader();
    canvas.toBlob(blob => {
        reader.readAsDataURL(blob)
        reader.onloadend = () => {
            // {/*this.dataURLtoFile(reader.result, 'cropped.jpg')*/}
            this.props.update(reader.result)
        }
    })

  }

  render() {
    // eslint-disable-next-line
    const { crop, croppedImageUrl, src } = this.state;

    return (
        <>
        {src && (
          <ReactCrop
            src={src}
            crop={crop}
            circularCrop={this.props.circularCrop}
            onImageLoaded={this.onImageLoaded}
            onComplete={this.onCropComplete}
            onChange={this.onCropChange}
            style={{maxHeight : "300px", maxWidth : "100%"}}
          />
        )}
        {/*croppedImageUrl && (
          <img alt="Crop" style={{ maxWidth: '100%', maxHeight : "100%"}} src={croppedImageUrl} />
        )*/}
        </>
    );
  }
}




/*License for this component:
MIT License

Copyright (c) 2020 ricardo.ch

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:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

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.*/