@asoftwareworld/form-builder
Version:
ASW Form Builder helps you with rapid development and designed web forms which includes several controls. The key feature of Form Builder is to make your content attractive and effective. We can customize our control at run time and preview the same befor
190 lines • 29.9 kB
JavaScript
/**
* @license
* Copyright ASW (A Software World) All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file
*/
import { Injectable } from '@angular/core';
import { getTransformationsFromExifData, supportsAutomaticRotation } from '../utils/exif.utils';
import * as i0 from "@angular/core";
export class LoadImageService {
autoRotateSupported = supportsAutomaticRotation();
loadImageFile(file, cropperSettings) {
return new Promise((resolve, reject) => {
const fileReader = new FileReader();
fileReader.onload = (event) => {
this.loadImage(event.target.result, file.type, cropperSettings)
.then(resolve)
.catch(reject);
};
fileReader.readAsDataURL(file);
});
}
loadImage(imageBase64, imageType, cropperSettings) {
if (!this.isValidImageType(imageType)) {
return Promise.reject(new Error('Invalid image type'));
}
return this.loadBase64Image(imageBase64, cropperSettings);
}
isValidImageType(type) {
return /image\/(png|jpg|jpeg|bmp|gif|tiff|webp|x-icon|vnd.microsoft.icon)/.test(type);
}
loadImageFromURL(url, cropperSettings) {
return new Promise((resolve, reject) => {
const img = new Image();
img.onerror = () => reject;
img.onload = () => {
const canvas = document.createElement('canvas');
const context = canvas.getContext('2d');
canvas.width = img.width;
canvas.height = img.height;
context?.drawImage(img, 0, 0);
this.loadBase64Image(canvas.toDataURL(), cropperSettings).then(resolve);
};
img.crossOrigin = 'anonymous';
img.src = url;
});
}
loadBase64Image(imageBase64, cropperSettings) {
return new Promise((resolve, reject) => {
const originalImage = new Image();
originalImage.onload = () => resolve({
originalImage,
originalBase64: imageBase64
});
originalImage.onerror = reject;
originalImage.src = imageBase64;
}).then((res) => this.transformImageBase64(res, cropperSettings));
}
async transformImageBase64(res, cropperSettings) {
const autoRotate = await this.autoRotateSupported;
const exifTransform = await getTransformationsFromExifData(autoRotate ? -1 : res.originalBase64);
if (!res.originalImage || !res.originalImage.complete) {
return Promise.reject(new Error('No image loaded'));
}
const loadedImage = {
original: {
base64: res.originalBase64,
image: res.originalImage,
size: {
width: res.originalImage.naturalWidth,
height: res.originalImage.naturalHeight
}
},
exifTransform
};
return this.transformLoadedImage(loadedImage, cropperSettings);
}
async transformLoadedImage(loadedImage, cropperSettings) {
// tslint:disable-next-line:no-non-null-assertion
const canvasRotation = cropperSettings.canvasRotation + loadedImage.exifTransform.rotate;
const originalSize = {
// tslint:disable-next-line:no-non-null-assertion
width: loadedImage.original.image.naturalWidth,
// tslint:disable-next-line:no-non-null-assertion
height: loadedImage.original.image.naturalHeight
};
// tslint:disable-next-line:no-non-null-assertion
if (canvasRotation === 0 && !loadedImage.exifTransform.flip && !cropperSettings.containWithinAspectRatio) {
return {
original: {
// tslint:disable-next-line:no-non-null-assertion
base64: loadedImage.original.base64,
// tslint:disable-next-line:no-non-null-assertion
image: loadedImage.original.image,
size: { ...originalSize }
},
transformed: {
// tslint:disable-next-line:no-non-null-assertion
base64: loadedImage.original.base64,
// tslint:disable-next-line:no-non-null-assertion
image: loadedImage.original.image,
size: { ...originalSize }
},
// tslint:disable-next-line:no-non-null-assertion
exifTransform: loadedImage.exifTransform
};
}
// tslint:disable-next-line:no-non-null-assertion
const transformedSize = this.getTransformedSize(originalSize, loadedImage.exifTransform, cropperSettings);
const canvas = document.createElement('canvas');
canvas.width = transformedSize.width;
canvas.height = transformedSize.height;
const ctx = canvas.getContext('2d');
ctx?.setTransform(
// tslint:disable-next-line:no-non-null-assertion
loadedImage.exifTransform.flip ? -1 : 1, 0, 0, 1, canvas.width / 2, canvas.height / 2);
ctx?.rotate(Math.PI * (canvasRotation / 2));
ctx?.drawImage(
// tslint:disable-next-line:no-non-null-assertion
loadedImage.original.image, -originalSize.width / 2, -originalSize.height / 2);
const transformedBase64 = canvas.toDataURL();
const transformedImage = await this.loadImageFromBase64(transformedBase64);
return {
original: {
// tslint:disable-next-line:no-non-null-assertion
base64: loadedImage.original.base64,
// tslint:disable-next-line:no-non-null-assertion
image: loadedImage.original.image,
size: { ...originalSize }
},
transformed: {
base64: transformedBase64,
image: transformedImage,
size: {
width: transformedImage.width,
height: transformedImage.height
}
},
// tslint:disable-next-line:no-non-null-assertion
exifTransform: loadedImage.exifTransform
};
}
loadImageFromBase64(imageBase64) {
return new Promise(((resolve, reject) => {
const image = new Image();
image.onload = () => resolve(image);
image.onerror = reject;
image.src = imageBase64;
}));
}
getTransformedSize(originalSize, exifTransform, cropperSettings) {
const canvasRotation = cropperSettings.canvasRotation + exifTransform.rotate;
if (cropperSettings.containWithinAspectRatio) {
if (canvasRotation % 2) {
const minWidthToContain = originalSize.width * cropperSettings.aspectRatio;
const minHeightToContain = originalSize.height / cropperSettings.aspectRatio;
return {
width: Math.max(originalSize.height, minWidthToContain),
height: Math.max(originalSize.width, minHeightToContain)
};
}
else {
const minWidthToContain = originalSize.height * cropperSettings.aspectRatio;
const minHeightToContain = originalSize.width / cropperSettings.aspectRatio;
return {
width: Math.max(originalSize.width, minWidthToContain),
height: Math.max(originalSize.height, minHeightToContain)
};
}
}
if (canvasRotation % 2) {
return {
height: originalSize.width,
width: originalSize.height
};
}
return {
width: originalSize.width,
height: originalSize.height
};
}
static ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "18.2.11", ngImport: i0, type: LoadImageService, deps: [], target: i0.ɵɵFactoryTarget.Injectable });
static ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "18.2.11", ngImport: i0, type: LoadImageService, providedIn: 'root' });
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "18.2.11", ngImport: i0, type: LoadImageService, decorators: [{
type: Injectable,
args: [{ providedIn: 'root' }]
}] });
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* @license\r\n * Copyright ASW (A Software World) All Rights Reserved.\r\n *\r\n * Use of this source code is governed by an MIT-style license that can be\r\n * found in the LICENSE file\r\n */\r\n\r\nimport { Injectable } from '@angular/core';\r\nimport { Dimensions, LoadedImage } from '../interfaces';\r\nimport { CropperSettings } from '../interfaces/cropper.settings';\r\nimport { ExifTransform } from '../interfaces/exif-transform.interface';\r\nimport { getTransformationsFromExifData, supportsAutomaticRotation } from '../utils/exif.utils';\r\n\r\ninterface LoadImageBase64 {\r\n    originalImage: HTMLImageElement;\r\n    originalBase64: string;\r\n}\r\n\r\n@Injectable({ providedIn: 'root' })\r\nexport class LoadImageService {\r\n\r\n    private autoRotateSupported: Promise<boolean> = supportsAutomaticRotation();\r\n\r\n    loadImageFile(file: File, cropperSettings: CropperSettings): Promise<LoadedImage> {\r\n        return new Promise((resolve, reject) => {\r\n            const fileReader = new FileReader();\r\n            fileReader.onload = (event: any) => {\r\n                this.loadImage(event.target.result, file.type, cropperSettings)\r\n                    .then(resolve)\r\n                    .catch(reject);\r\n            };\r\n            fileReader.readAsDataURL(file);\r\n        });\r\n    }\r\n\r\n    private loadImage(imageBase64: string, imageType: string, cropperSettings: CropperSettings): Promise<LoadedImage> {\r\n        if (!this.isValidImageType(imageType)) {\r\n            return Promise.reject(new Error('Invalid image type'));\r\n        }\r\n        return this.loadBase64Image(imageBase64, cropperSettings);\r\n    }\r\n\r\n    private isValidImageType(type: string): boolean {\r\n        return /image\\/(png|jpg|jpeg|bmp|gif|tiff|webp|x-icon|vnd.microsoft.icon)/.test(type);\r\n    }\r\n\r\n    loadImageFromURL(url: string, cropperSettings: CropperSettings): Promise<LoadedImage> {\r\n        return new Promise((resolve, reject) => {\r\n            const img = new Image();\r\n            img.onerror = () => reject;\r\n            img.onload = () => {\r\n                const canvas = document.createElement('canvas');\r\n                const context = canvas.getContext('2d');\r\n                canvas.width = img.width;\r\n                canvas.height = img.height;\r\n                context?.drawImage(img, 0, 0);\r\n                this.loadBase64Image(canvas.toDataURL(), cropperSettings).then(resolve);\r\n            };\r\n            img.crossOrigin = 'anonymous';\r\n            img.src = url;\r\n        });\r\n    }\r\n\r\n    loadBase64Image(imageBase64: string, cropperSettings: CropperSettings): Promise<LoadedImage> {\r\n        return new Promise<LoadImageBase64>((resolve, reject) => {\r\n            const originalImage = new Image();\r\n            originalImage.onload = () => resolve({\r\n                originalImage,\r\n                originalBase64: imageBase64\r\n            });\r\n            originalImage.onerror = reject;\r\n            originalImage.src = imageBase64;\r\n        }).then((res: LoadImageBase64) => this.transformImageBase64(res, cropperSettings));\r\n    }\r\n\r\n    private async transformImageBase64(res: LoadImageBase64, cropperSettings: CropperSettings): Promise<LoadedImage> {\r\n        const autoRotate = await this.autoRotateSupported;\r\n        const exifTransform = await getTransformationsFromExifData(autoRotate ? -1 : res.originalBase64);\r\n        if (!res.originalImage || !res.originalImage.complete) {\r\n            return Promise.reject(new Error('No image loaded'));\r\n        }\r\n        const loadedImage = {\r\n            original: {\r\n                base64: res.originalBase64,\r\n                image: res.originalImage,\r\n                size: {\r\n                    width: res.originalImage.naturalWidth,\r\n                    height: res.originalImage.naturalHeight\r\n                }\r\n            },\r\n            exifTransform\r\n        };\r\n        return this.transformLoadedImage(loadedImage, cropperSettings);\r\n    }\r\n\r\n    async transformLoadedImage(loadedImage: Partial<LoadedImage>, cropperSettings: CropperSettings): Promise<LoadedImage> {\r\n        // tslint:disable-next-line:no-non-null-assertion\r\n        const canvasRotation = cropperSettings.canvasRotation + loadedImage.exifTransform!.rotate;\r\n        const originalSize = {\r\n            // tslint:disable-next-line:no-non-null-assertion\r\n            width: loadedImage.original!.image.naturalWidth,\r\n            // tslint:disable-next-line:no-non-null-assertion\r\n            height: loadedImage.original!.image.naturalHeight\r\n        };\r\n        // tslint:disable-next-line:no-non-null-assertion\r\n        if (canvasRotation === 0 && !loadedImage.exifTransform!.flip && !cropperSettings.containWithinAspectRatio) {\r\n            return {\r\n                original: {\r\n                    // tslint:disable-next-line:no-non-null-assertion\r\n                    base64: loadedImage.original!.base64,\r\n                    // tslint:disable-next-line:no-non-null-assertion\r\n                    image: loadedImage.original!.image,\r\n                    size: { ...originalSize }\r\n                },\r\n                transformed: {\r\n                    // tslint:disable-next-line:no-non-null-assertion\r\n                    base64: loadedImage.original!.base64,\r\n                    // tslint:disable-next-line:no-non-null-assertion\r\n                    image: loadedImage.original!.image,\r\n                    size: { ...originalSize }\r\n                },\r\n                // tslint:disable-next-line:no-non-null-assertion\r\n                exifTransform: loadedImage.exifTransform!\r\n            };\r\n        }\r\n        // tslint:disable-next-line:no-non-null-assertion\r\n        const transformedSize = this.getTransformedSize(originalSize, loadedImage.exifTransform!, cropperSettings);\r\n        const canvas = document.createElement('canvas');\r\n        canvas.width = transformedSize.width;\r\n        canvas.height = transformedSize.height;\r\n        const ctx = canvas.getContext('2d');\r\n        ctx?.setTransform(\r\n            // tslint:disable-next-line:no-non-null-assertion\r\n            loadedImage.exifTransform!.flip ? -1 : 1,\r\n            0,\r\n            0,\r\n            1,\r\n            canvas.width / 2,\r\n            canvas.height / 2\r\n        );\r\n        ctx?.rotate(Math.PI * (canvasRotation / 2));\r\n        ctx?.drawImage(\r\n            // tslint:disable-next-line:no-non-null-assertion\r\n            loadedImage.original!.image,\r\n            -originalSize.width / 2,\r\n            -originalSize.height / 2\r\n        );\r\n        const transformedBase64 = canvas.toDataURL();\r\n        const transformedImage = await this.loadImageFromBase64(transformedBase64);\r\n        return {\r\n            original: {\r\n                // tslint:disable-next-line:no-non-null-assertion\r\n                base64: loadedImage.original!.base64,\r\n                // tslint:disable-next-line:no-non-null-assertion\r\n                image: loadedImage.original!.image,\r\n                size: { ...originalSize }\r\n            },\r\n            transformed: {\r\n                base64: transformedBase64,\r\n                image: transformedImage,\r\n                size: {\r\n                    width: transformedImage.width,\r\n                    height: transformedImage.height\r\n                }\r\n            },\r\n            // tslint:disable-next-line:no-non-null-assertion\r\n            exifTransform: loadedImage.exifTransform!\r\n        };\r\n    }\r\n\r\n    private loadImageFromBase64(imageBase64: string): Promise<HTMLImageElement> {\r\n        return new Promise<HTMLImageElement>(((resolve, reject) => {\r\n            const image = new Image();\r\n            image.onload = () => resolve(image);\r\n            image.onerror = reject;\r\n            image.src = imageBase64;\r\n        }));\r\n    }\r\n\r\n    private getTransformedSize(\r\n        originalSize: { width: number, height: number },\r\n        exifTransform: ExifTransform,\r\n        cropperSettings: CropperSettings\r\n    ): Dimensions {\r\n        const canvasRotation = cropperSettings.canvasRotation + exifTransform.rotate;\r\n        if (cropperSettings.containWithinAspectRatio) {\r\n            if (canvasRotation % 2) {\r\n                const minWidthToContain = originalSize.width * cropperSettings.aspectRatio;\r\n                const minHeightToContain = originalSize.height / cropperSettings.aspectRatio;\r\n                return {\r\n                    width: Math.max(originalSize.height, minWidthToContain),\r\n                    height: Math.max(originalSize.width, minHeightToContain)\r\n                };\r\n            } else {\r\n                const minWidthToContain = originalSize.height * cropperSettings.aspectRatio;\r\n                const minHeightToContain = originalSize.width / cropperSettings.aspectRatio;\r\n                return {\r\n                    width: Math.max(originalSize.width, minWidthToContain),\r\n                    height: Math.max(originalSize.height, minHeightToContain)\r\n                };\r\n            }\r\n        }\r\n\r\n        if (canvasRotation % 2) {\r\n            return {\r\n                height: originalSize.width,\r\n                width: originalSize.height\r\n            };\r\n        }\r\n        return {\r\n            width: originalSize.width,\r\n            height: originalSize.height\r\n        };\r\n    }\r\n}\r\n"]}