@asoftwareworld/form-builder-pro
Version:
ASW Form Builder Pro 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 b
175 lines • 28 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 '@asoftwareworld/form-builder-pro/utils';
import * as i0 from "@angular/core";
export class LoadImageService {
autoRotateSupported = supportsAutomaticRotation();
loadImageFile(file, cropperSettings) {
return file.arrayBuffer().then((arrayBuffer) => this.checkImageTypeAndLoadImageFromArrayBuffer(arrayBuffer, file.type, cropperSettings));
}
checkImageTypeAndLoadImageFromArrayBuffer(arrayBuffer, imageType, cropperSettings) {
if (!this.isValidImageType(imageType)) {
return Promise.reject(new Error('Invalid image type'));
}
return this.loadImageFromArrayBuffer(arrayBuffer, cropperSettings);
}
isValidImageType(type) {
return /image\/(png|jpg|jpeg|bmp|gif|tiff|webp|x-icon|vnd.microsoft.icon)/.test(type);
}
loadImageFromURL(url, cropperSettings) {
return fetch(url)
.then((res) => res.arrayBuffer())
.then((buffer) => this.loadImageFromArrayBuffer(buffer, cropperSettings));
}
loadBase64Image(imageBase64, cropperSettings) {
const arrayBuffer = this.base64ToArrayBuffer(imageBase64);
return this.loadImageFromArrayBuffer(arrayBuffer, cropperSettings);
}
base64ToArrayBuffer(imageBase64) {
imageBase64 = imageBase64.replace(/^data\:([^\;]+)\;base64,/gim, '');
const binaryString = atob(imageBase64);
const len = binaryString.length;
const bytes = new Uint8Array(len);
for (let i = 0; i < len; i++) {
bytes[i] = binaryString.charCodeAt(i);
}
return bytes.buffer;
}
loadImageFromArrayBuffer(arrayBuffer, cropperSettings) {
return new Promise((resolve, reject) => {
const blob = new Blob([arrayBuffer]);
const objectUrl = URL.createObjectURL(blob);
const originalImage = new Image();
originalImage.onload = () => resolve({
originalImage,
originalObjectUrl: objectUrl,
originalArrayBuffer: arrayBuffer
});
originalImage.onerror = reject;
originalImage.src = objectUrl;
}).then((res) => this.transformImageFromArrayBuffer(res, cropperSettings));
}
async transformImageFromArrayBuffer(res, cropperSettings) {
const autoRotate = await this.autoRotateSupported;
const exifTransform = await getTransformationsFromExifData(autoRotate ? -1 : res.originalArrayBuffer);
if (!res.originalImage || !res.originalImage.complete) {
return Promise.reject(new Error('No image loaded'));
}
const loadedImage = {
original: {
objectUrl: res.originalObjectUrl,
image: res.originalImage,
size: {
width: res.originalImage.naturalWidth,
height: res.originalImage.naturalHeight
}
},
exifTransform
};
return this.transformLoadedImage(loadedImage, cropperSettings);
}
async transformLoadedImage(loadedImage, cropperSettings) {
const canvasRotation = cropperSettings.canvasRotation + loadedImage.exifTransform.rotate;
const originalSize = {
width: loadedImage.original.image.naturalWidth,
height: loadedImage.original.image.naturalHeight
};
if (canvasRotation === 0 && !loadedImage.exifTransform.flip && !cropperSettings.containWithinAspectRatio) {
return {
original: {
objectUrl: loadedImage.original.objectUrl,
image: loadedImage.original.image,
size: { ...originalSize }
},
transformed: {
objectUrl: loadedImage.original.objectUrl,
image: loadedImage.original.image,
size: { ...originalSize }
},
exifTransform: loadedImage.exifTransform
};
}
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(loadedImage.exifTransform.flip ? -1 : 1, 0, 0, 1, canvas.width / 2, canvas.height / 2);
ctx?.rotate(Math.PI * (canvasRotation / 2));
ctx?.drawImage(loadedImage.original.image, -originalSize.width / 2, -originalSize.height / 2);
const blob = await new Promise((resolve) => canvas.toBlob(resolve, cropperSettings.format));
if (!blob) {
throw new Error('Failed to get Blob for transformed image.');
}
const objectUrl = URL.createObjectURL(blob);
const transformedImage = await this.loadImageFromObjectUrl(objectUrl);
return {
original: {
objectUrl: loadedImage.original.objectUrl,
image: loadedImage.original.image,
size: { ...originalSize }
},
transformed: {
objectUrl: objectUrl,
image: transformedImage,
size: {
width: transformedImage.width,
height: transformedImage.height
}
},
exifTransform: loadedImage.exifTransform
};
}
loadImageFromObjectUrl(objectUrl) {
return new Promise((resolve, reject) => {
const image = new Image();
image.onload = () => resolve(image);
image.onerror = reject;
image.src = objectUrl;
});
}
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: "18.2.8", ngImport: i0, type: LoadImageService, deps: [], target: i0.ɵɵFactoryTarget.Injectable });
static ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "18.2.8", ngImport: i0, type: LoadImageService, providedIn: 'root' });
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "18.2.8", ngImport: i0, type: LoadImageService, decorators: [{
type: Injectable,
args: [{ providedIn: 'root' }]
}] });
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* @license\n * Copyright ASW (A Software World) All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file\n */\n\nimport { Injectable } from '@angular/core';\nimport { CropperSettings, Dimensions, ExifTransform, LoadedImage } from '@asoftwareworld/form-builder-pro/api';\nimport { getTransformationsFromExifData, supportsAutomaticRotation } from '@asoftwareworld/form-builder-pro/utils';\n\ninterface LoadImageArrayBuffer {\n    originalImage: HTMLImageElement;\n    originalArrayBuffer: ArrayBufferLike;\n    originalObjectUrl: string;\n}\n\n@Injectable({ providedIn: 'root' })\nexport class LoadImageService {\n    private autoRotateSupported: Promise<boolean> = supportsAutomaticRotation();\n\n    loadImageFile(file: File, cropperSettings: CropperSettings): Promise<LoadedImage> {\n        return file.arrayBuffer().then((arrayBuffer) => this.checkImageTypeAndLoadImageFromArrayBuffer(arrayBuffer, file.type, cropperSettings));\n    }\n\n    private checkImageTypeAndLoadImageFromArrayBuffer(arrayBuffer: ArrayBufferLike, imageType: string, cropperSettings: CropperSettings): Promise<LoadedImage> {\n        if (!this.isValidImageType(imageType)) {\n            return Promise.reject(new Error('Invalid image type'));\n        }\n        return this.loadImageFromArrayBuffer(arrayBuffer, cropperSettings);\n    }\n\n    private isValidImageType(type: string): boolean {\n        return /image\\/(png|jpg|jpeg|bmp|gif|tiff|webp|x-icon|vnd.microsoft.icon)/.test(type);\n    }\n\n    loadImageFromURL(url: string, cropperSettings: CropperSettings): Promise<LoadedImage> {\n        return fetch(url)\n            .then((res) => res.arrayBuffer())\n            .then((buffer) => this.loadImageFromArrayBuffer(buffer, cropperSettings));\n    }\n\n    loadBase64Image(imageBase64: string, cropperSettings: CropperSettings): Promise<LoadedImage> {\n        const arrayBuffer = this.base64ToArrayBuffer(imageBase64);\n        return this.loadImageFromArrayBuffer(arrayBuffer, cropperSettings);\n    }\n\n    private base64ToArrayBuffer(imageBase64: string): ArrayBufferLike {\n        imageBase64 = imageBase64.replace(/^data\\:([^\\;]+)\\;base64,/gim, '');\n        const binaryString = atob(imageBase64);\n        const len = binaryString.length;\n        const bytes = new Uint8Array(len);\n        for (let i = 0; i < len; i++) {\n            bytes[i] = binaryString.charCodeAt(i);\n        }\n        return bytes.buffer;\n    }\n\n    private loadImageFromArrayBuffer(arrayBuffer: ArrayBufferLike, cropperSettings: CropperSettings): Promise<LoadedImage> {\n        return new Promise<LoadImageArrayBuffer>((resolve, reject) => {\n            const blob = new Blob([arrayBuffer]);\n            const objectUrl = URL.createObjectURL(blob);\n            const originalImage = new Image();\n            originalImage.onload = () =>\n                resolve({\n                    originalImage,\n                    originalObjectUrl: objectUrl,\n                    originalArrayBuffer: arrayBuffer\n                });\n            originalImage.onerror = reject;\n            originalImage.src = objectUrl;\n        }).then((res: LoadImageArrayBuffer) => this.transformImageFromArrayBuffer(res, cropperSettings));\n    }\n\n    private async transformImageFromArrayBuffer(res: LoadImageArrayBuffer, cropperSettings: CropperSettings): Promise<LoadedImage> {\n        const autoRotate = await this.autoRotateSupported;\n        const exifTransform = await getTransformationsFromExifData(autoRotate ? -1 : res.originalArrayBuffer);\n        if (!res.originalImage || !res.originalImage.complete) {\n            return Promise.reject(new Error('No image loaded'));\n        }\n        const loadedImage = {\n            original: {\n                objectUrl: res.originalObjectUrl,\n                image: res.originalImage,\n                size: {\n                    width: res.originalImage.naturalWidth,\n                    height: res.originalImage.naturalHeight\n                }\n            },\n            exifTransform\n        };\n        return this.transformLoadedImage(loadedImage, cropperSettings);\n    }\n\n    async transformLoadedImage(loadedImage: Partial<LoadedImage>, cropperSettings: CropperSettings): Promise<LoadedImage> {\n        const canvasRotation = cropperSettings.canvasRotation + loadedImage.exifTransform!.rotate;\n        const originalSize = {\n            width: loadedImage.original!.image.naturalWidth,\n            height: loadedImage.original!.image.naturalHeight\n        };\n        if (canvasRotation === 0 && !loadedImage.exifTransform!.flip && !cropperSettings.containWithinAspectRatio) {\n            return {\n                original: {\n                    objectUrl: loadedImage.original!.objectUrl,\n                    image: loadedImage.original!.image,\n                    size: { ...originalSize }\n                },\n                transformed: {\n                    objectUrl: loadedImage.original!.objectUrl,\n                    image: loadedImage.original!.image,\n                    size: { ...originalSize }\n                },\n                exifTransform: loadedImage.exifTransform!\n            };\n        }\n\n        const transformedSize = this.getTransformedSize(originalSize, loadedImage.exifTransform!, cropperSettings);\n        const canvas = document.createElement('canvas');\n        canvas.width = transformedSize.width;\n        canvas.height = transformedSize.height;\n        const ctx = canvas.getContext('2d');\n        ctx?.setTransform(loadedImage.exifTransform!.flip ? -1 : 1, 0, 0, 1, canvas.width / 2, canvas.height / 2);\n        ctx?.rotate(Math.PI * (canvasRotation / 2));\n        ctx?.drawImage(loadedImage.original!.image, -originalSize.width / 2, -originalSize.height / 2);\n        const blob = await new Promise<Blob | null>((resolve) => canvas.toBlob(resolve, cropperSettings.format));\n        if (!blob) {\n            throw new Error('Failed to get Blob for transformed image.');\n        }\n        const objectUrl = URL.createObjectURL(blob);\n        const transformedImage = await this.loadImageFromObjectUrl(objectUrl);\n        return {\n            original: {\n                objectUrl: loadedImage.original!.objectUrl,\n                image: loadedImage.original!.image,\n                size: { ...originalSize }\n            },\n            transformed: {\n                objectUrl: objectUrl,\n                image: transformedImage,\n                size: {\n                    width: transformedImage.width,\n                    height: transformedImage.height\n                }\n            },\n            exifTransform: loadedImage.exifTransform!\n        };\n    }\n\n    private loadImageFromObjectUrl(objectUrl: string): Promise<HTMLImageElement> {\n        return new Promise<HTMLImageElement>((resolve, reject) => {\n            const image = new Image();\n            image.onload = () => resolve(image);\n            image.onerror = reject;\n            image.src = objectUrl;\n        });\n    }\n\n    private getTransformedSize(originalSize: { width: number; height: number }, exifTransform: ExifTransform, cropperSettings: CropperSettings): Dimensions {\n        const canvasRotation = cropperSettings.canvasRotation + exifTransform.rotate;\n        if (cropperSettings.containWithinAspectRatio) {\n            if (canvasRotation % 2) {\n                const minWidthToContain = originalSize.width * cropperSettings.aspectRatio;\n                const minHeightToContain = originalSize.height / cropperSettings.aspectRatio;\n                return {\n                    width: Math.max(originalSize.height, minWidthToContain),\n                    height: Math.max(originalSize.width, minHeightToContain)\n                };\n            } else {\n                const minWidthToContain = originalSize.height * cropperSettings.aspectRatio;\n                const minHeightToContain = originalSize.width / cropperSettings.aspectRatio;\n                return {\n                    width: Math.max(originalSize.width, minWidthToContain),\n                    height: Math.max(originalSize.height, minHeightToContain)\n                };\n            }\n        }\n\n        if (canvasRotation % 2) {\n            return {\n                height: originalSize.width,\n                width: originalSize.height\n            };\n        }\n        return {\n            width: originalSize.width,\n            height: originalSize.height\n        };\n    }\n}\n"]}