@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
127 lines • 24.2 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 { percentage } from '../utils/percentage.utils';
import { resizeCanvas } from '../utils/resize.utils';
import * as i0 from "@angular/core";
export class CropService {
crop(sourceImage, loadedImage, cropper, settings) {
const imagePosition = this.getImagePosition(sourceImage, loadedImage, cropper, settings);
const width = imagePosition.x2 - imagePosition.x1;
const height = imagePosition.y2 - imagePosition.y1;
const cropCanvas = document.createElement('canvas');
cropCanvas.width = width;
cropCanvas.height = height;
const ctx = cropCanvas.getContext('2d');
if (!ctx) {
return null;
}
if (settings.backgroundColor != null) {
ctx.fillStyle = settings.backgroundColor;
ctx.fillRect(0, 0, width, height);
}
const scaleX = (settings.transform.scale || 1) * (settings.transform.flipH ? -1 : 1);
const scaleY = (settings.transform.scale || 1) * (settings.transform.flipV ? -1 : 1);
const transformedImage = loadedImage.transformed;
ctx.setTransform(scaleX, 0, 0, scaleY, transformedImage.size.width / 2, transformedImage.size.height / 2);
ctx.translate(-imagePosition.x1 / scaleX, -imagePosition.y1 / scaleY);
ctx.rotate((settings.transform.rotate || 0) * Math.PI / 180);
const translateH = settings.transform.translateH ? percentage(settings.transform.translateH, transformedImage.size.width) : 0;
const translateV = settings.transform.translateV ? percentage(settings.transform.translateV, transformedImage.size.height) : 0;
ctx.drawImage(transformedImage.image, translateH - transformedImage.size.width / 2, translateV - transformedImage.size.height / 2);
const output = {
width, height,
imagePosition,
cropperPosition: { ...cropper }
};
if (settings.containWithinAspectRatio) {
output.offsetImagePosition = this.getOffsetImagePosition(sourceImage, loadedImage, cropper, settings);
}
const resizeRatio = this.getResizeRatio(width, height, settings);
if (resizeRatio !== 1) {
output.width = Math.round(width * resizeRatio);
output.height = settings.maintainAspectRatio
? Math.round(output.width / settings.aspectRatio)
: Math.round(height * resizeRatio);
resizeCanvas(cropCanvas, output.width, output.height);
}
output.base64 = cropCanvas.toDataURL('image/' + settings.format, this.getQuality(settings));
return output;
}
getImagePosition(sourceImage, loadedImage, cropper, settings) {
const sourceImageElement = sourceImage.nativeElement;
const ratio = loadedImage.transformed.size.width / sourceImageElement.offsetWidth;
const out = {
x1: Math.round(cropper.x1 * ratio),
y1: Math.round(cropper.y1 * ratio),
x2: Math.round(cropper.x2 * ratio),
y2: Math.round(cropper.y2 * ratio)
};
if (!settings.containWithinAspectRatio) {
out.x1 = Math.max(out.x1, 0);
out.y1 = Math.max(out.y1, 0);
out.x2 = Math.min(out.x2, loadedImage.transformed.size.width);
out.y2 = Math.min(out.y2, loadedImage.transformed.size.height);
}
return out;
}
getOffsetImagePosition(sourceImage, loadedImage, cropper, settings) {
const canvasRotation = settings.canvasRotation + loadedImage.exifTransform.rotate;
const sourceImageElement = sourceImage.nativeElement;
const ratio = loadedImage.transformed.size.width / sourceImageElement.offsetWidth;
let offsetX;
let offsetY;
if (canvasRotation % 2) {
offsetX = (loadedImage.transformed.size.width - loadedImage.original.size.height) / 2;
offsetY = (loadedImage.transformed.size.height - loadedImage.original.size.width) / 2;
}
else {
offsetX = (loadedImage.transformed.size.width - loadedImage.original.size.width) / 2;
offsetY = (loadedImage.transformed.size.height - loadedImage.original.size.height) / 2;
}
const out = {
x1: Math.round(cropper.x1 * ratio) - offsetX,
y1: Math.round(cropper.y1 * ratio) - offsetY,
x2: Math.round(cropper.x2 * ratio) - offsetX,
y2: Math.round(cropper.y2 * ratio) - offsetY
};
if (!settings.containWithinAspectRatio) {
out.x1 = Math.max(out.x1, 0);
out.y1 = Math.max(out.y1, 0);
out.x2 = Math.min(out.x2, loadedImage.transformed.size.width);
out.y2 = Math.min(out.y2, loadedImage.transformed.size.height);
}
return out;
}
getResizeRatio(width, height, settings) {
const ratioWidth = settings.resizeToWidth / width;
const ratioHeight = settings.resizeToHeight / height;
const ratios = new Array();
if (settings.resizeToWidth > 0) {
ratios.push(ratioWidth);
}
if (settings.resizeToHeight > 0) {
ratios.push(ratioHeight);
}
const result = ratios.length === 0 ? 1 : Math.min(...ratios);
if (result > 1 && !settings.onlyScaleDown) {
return result;
}
return Math.min(result, 1);
}
getQuality(settings) {
return Math.min(1, Math.max(0, settings.imageQuality / 100));
}
static ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "18.2.11", ngImport: i0, type: CropService, deps: [], target: i0.ɵɵFactoryTarget.Injectable });
static ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "18.2.11", ngImport: i0, type: CropService, providedIn: 'root' });
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "18.2.11", ngImport: i0, type: CropService, 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 { ElementRef, Injectable } from '@angular/core';\r\nimport { CropperPosition, ImageCroppedEvent, LoadedImage } from '../interfaces';\r\nimport { CropperSettings } from '../interfaces/cropper.settings';\r\nimport { percentage } from '../utils/percentage.utils';\r\nimport { resizeCanvas } from '../utils/resize.utils';\r\n\r\n@Injectable({ providedIn: 'root' })\r\nexport class CropService {\r\n\r\n    crop(sourceImage: ElementRef, loadedImage: LoadedImage, cropper: CropperPosition, settings: CropperSettings): ImageCroppedEvent | null {\r\n        const imagePosition = this.getImagePosition(sourceImage, loadedImage, cropper, settings);\r\n        const width = imagePosition.x2 - imagePosition.x1;\r\n        const height = imagePosition.y2 - imagePosition.y1;\r\n        const cropCanvas = document.createElement('canvas') as HTMLCanvasElement;\r\n        cropCanvas.width = width;\r\n        cropCanvas.height = height;\r\n\r\n        const ctx = cropCanvas.getContext('2d');\r\n        if (!ctx) {\r\n            return null;\r\n        }\r\n        if (settings.backgroundColor != null) {\r\n            ctx.fillStyle = settings.backgroundColor;\r\n            ctx.fillRect(0, 0, width, height);\r\n        }\r\n\r\n        const scaleX = (settings.transform.scale || 1) * (settings.transform.flipH ? -1 : 1);\r\n        const scaleY = (settings.transform.scale || 1) * (settings.transform.flipV ? -1 : 1);\r\n\r\n        const transformedImage = loadedImage.transformed;\r\n        ctx.setTransform(scaleX, 0, 0, scaleY, transformedImage.size.width / 2, transformedImage.size.height / 2);\r\n        ctx.translate(-imagePosition.x1 / scaleX, -imagePosition.y1 / scaleY);\r\n        ctx.rotate((settings.transform.rotate || 0) * Math.PI / 180);\r\n\r\n        const translateH = settings.transform.translateH ? percentage(settings.transform.translateH, transformedImage.size.width) : 0;\r\n        const translateV = settings.transform.translateV ? percentage(settings.transform.translateV, transformedImage.size.height) : 0;\r\n\r\n        ctx.drawImage(\r\n            transformedImage.image,\r\n            translateH - transformedImage.size.width / 2,\r\n            translateV - transformedImage.size.height / 2\r\n        );\r\n\r\n        const output: ImageCroppedEvent = {\r\n            width, height,\r\n            imagePosition,\r\n            cropperPosition: { ...cropper }\r\n        };\r\n        if (settings.containWithinAspectRatio) {\r\n            output.offsetImagePosition = this.getOffsetImagePosition(sourceImage, loadedImage, cropper, settings);\r\n        }\r\n        const resizeRatio = this.getResizeRatio(width, height, settings);\r\n        if (resizeRatio !== 1) {\r\n            output.width = Math.round(width * resizeRatio);\r\n            output.height = settings.maintainAspectRatio\r\n                ? Math.round(output.width / settings.aspectRatio)\r\n                : Math.round(height * resizeRatio);\r\n            resizeCanvas(cropCanvas, output.width, output.height);\r\n        }\r\n        output.base64 = cropCanvas.toDataURL('image/' + settings.format, this.getQuality(settings));\r\n        return output;\r\n    }\r\n\r\n    private getImagePosition(\r\n        sourceImage: ElementRef,\r\n        loadedImage: LoadedImage,\r\n        cropper: CropperPosition,\r\n        settings: CropperSettings): CropperPosition {\r\n        const sourceImageElement = sourceImage.nativeElement;\r\n        const ratio = loadedImage.transformed.size.width / sourceImageElement.offsetWidth;\r\n\r\n        const out: CropperPosition = {\r\n            x1: Math.round(cropper.x1 * ratio),\r\n            y1: Math.round(cropper.y1 * ratio),\r\n            x2: Math.round(cropper.x2 * ratio),\r\n            y2: Math.round(cropper.y2 * ratio)\r\n        };\r\n\r\n        if (!settings.containWithinAspectRatio) {\r\n            out.x1 = Math.max(out.x1, 0);\r\n            out.y1 = Math.max(out.y1, 0);\r\n            out.x2 = Math.min(out.x2, loadedImage.transformed.size.width);\r\n            out.y2 = Math.min(out.y2, loadedImage.transformed.size.height);\r\n        }\r\n\r\n        return out;\r\n    }\r\n\r\n    private getOffsetImagePosition(\r\n        sourceImage: ElementRef,\r\n        loadedImage: LoadedImage,\r\n        cropper: CropperPosition,\r\n        settings: CropperSettings): CropperPosition {\r\n        const canvasRotation = settings.canvasRotation + loadedImage.exifTransform.rotate;\r\n        const sourceImageElement = sourceImage.nativeElement;\r\n        const ratio = loadedImage.transformed.size.width / sourceImageElement.offsetWidth;\r\n        let offsetX: number;\r\n        let offsetY: number;\r\n\r\n        if (canvasRotation % 2) {\r\n            offsetX = (loadedImage.transformed.size.width - loadedImage.original.size.height) / 2;\r\n            offsetY = (loadedImage.transformed.size.height - loadedImage.original.size.width) / 2;\r\n        } else {\r\n            offsetX = (loadedImage.transformed.size.width - loadedImage.original.size.width) / 2;\r\n            offsetY = (loadedImage.transformed.size.height - loadedImage.original.size.height) / 2;\r\n        }\r\n\r\n        const out: CropperPosition = {\r\n            x1: Math.round(cropper.x1 * ratio) - offsetX,\r\n            y1: Math.round(cropper.y1 * ratio) - offsetY,\r\n            x2: Math.round(cropper.x2 * ratio) - offsetX,\r\n            y2: Math.round(cropper.y2 * ratio) - offsetY\r\n        };\r\n\r\n        if (!settings.containWithinAspectRatio) {\r\n            out.x1 = Math.max(out.x1, 0);\r\n            out.y1 = Math.max(out.y1, 0);\r\n            out.x2 = Math.min(out.x2, loadedImage.transformed.size.width);\r\n            out.y2 = Math.min(out.y2, loadedImage.transformed.size.height);\r\n        }\r\n\r\n        return out;\r\n    }\r\n\r\n    getResizeRatio(width: number, height: number, settings: CropperSettings): number {\r\n        const ratioWidth = settings.resizeToWidth / width;\r\n        const ratioHeight = settings.resizeToHeight / height;\r\n        const ratios = new Array<number>();\r\n\r\n        if (settings.resizeToWidth > 0) {\r\n            ratios.push(ratioWidth);\r\n        }\r\n        if (settings.resizeToHeight > 0) {\r\n            ratios.push(ratioHeight);\r\n        }\r\n\r\n        const result = ratios.length === 0 ? 1 : Math.min(...ratios);\r\n\r\n        if (result > 1 && !settings.onlyScaleDown) {\r\n            return result;\r\n        }\r\n        return Math.min(result, 1);\r\n    }\r\n\r\n    getQuality(settings: CropperSettings): number {\r\n        return Math.min(1, Math.max(0, settings.imageQuality / 100));\r\n    }\r\n}\r\n"]}