ngx-capture
Version:
Screen capture library for Angular
129 lines • 16.5 kB
JavaScript
import { Component, EventEmitter, Input, Output, ViewChild } from '@angular/core';
import { Subject } from 'rxjs';
import { take, tap } from 'rxjs/operators';
import * as i0 from "@angular/core";
import * as i1 from "./ngx-capture.service";
export class NgxCaptureComponent {
constructor(captureService) {
this.captureService = captureService;
this.resultImage = new EventEmitter();
this.isDrawing = false;
this.mouseStart = { x: 0, y: 0 };
this.cropDimensions = {
x: 0,
y: 0,
width: 0,
height: 0,
};
this.destroy$ = new Subject();
}
ngOnInit() {
setTimeout(() => {
this.rect = this.rectangle.nativeElement;
this.captureZone = this.overlay.nativeElement;
if (!this.captureZone) {
console.warn('"captureZone" is not set');
return;
}
this.captureZone.onmousedown = (e) => this.startCapture(e);
this.captureZone.onmousemove = (e) => this.drawRect(e);
this.captureZone.onmouseup = () => this.endCapture();
}, 2000);
}
startCapture(e) {
const mouse = this.setMousePosition(e, true);
this.isDrawing = true;
this.cropDimensions = {
x: mouse.x,
y: mouse.y,
width: 0,
height: 0,
};
this.captureZone.style.cursor = 'crosshair';
}
drawRect(e) {
if (this.isDrawing) {
const mouse = this.setMousePosition(e, false);
this.cropDimensions = {
x: mouse.x - this.mouseStart.x < 0 ? mouse.x : this.mouseStart.x,
y: mouse.y - this.mouseStart.y < 0 ? mouse.y : this.mouseStart.y,
width: Math.abs(mouse.x - this.mouseStart.x),
height: Math.abs(mouse.y - this.mouseStart.y),
};
this.setRectangle();
}
}
setMousePosition(e, isStart = false) {
const ev = e || window.event; // Moz || IE
const mouse = { x: 0, y: 0 };
if (ev.pageX) {
// Moz
mouse.x = ev.clientX;
mouse.y = ev.clientY;
}
else if (ev.clientX) {
// IE
mouse.x = ev.clientX + document.body.scrollLeft;
mouse.y = ev.clientY + document.body.scrollTop;
}
if (isStart) {
this.mouseStart.x = mouse.x;
this.mouseStart.y = mouse.y;
}
return mouse;
}
endCapture() {
this.captureZone.style.cursor = 'default';
this.isDrawing = false;
this.captureService
.getImage(this.target, false, {
...this.cropDimensions,
x: this.cropDimensions.x + window.scrollX,
y: this.cropDimensions.y + window.scrollY,
})
.pipe(take(1), tap((img) => {
this.resultImage.emit(img);
}))
.subscribe();
this.cropDimensions = {
x: 0,
y: 0,
width: 0,
height: 0,
};
this.setRectangle();
}
setRectangle() {
this.rect.style.left = this.cropDimensions.x + 'px';
this.rect.style.top = this.cropDimensions.y + 'px';
this.rect.style.width = this.cropDimensions.width + 'px';
this.rect.style.height = this.cropDimensions.height + 'px';
}
}
NgxCaptureComponent.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "15.2.8", ngImport: i0, type: NgxCaptureComponent, deps: [{ token: i1.NgxCaptureService }], target: i0.ɵɵFactoryTarget.Component });
NgxCaptureComponent.ɵcmp = i0.ɵɵngDeclareComponent({ minVersion: "14.0.0", version: "15.2.8", type: NgxCaptureComponent, selector: "ngx-capture", inputs: { target: "target" }, outputs: { resultImage: "resultImage" }, viewQueries: [{ propertyName: "rectangle", first: true, predicate: ["rect"], descendants: true, static: true }, { propertyName: "overlay", first: true, predicate: ["over"], descendants: true, static: true }], ngImport: i0, template: `
<ng-content></ng-content>
<div class="overlay" #over>
<div class="rectangle" #rect></div>
</div>
`, isInline: true, styles: [".overlay{top:0;left:0;position:fixed;width:100vw;height:100vh}.rectangle{border:1px solid #ff0000;position:absolute}\n"] });
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "15.2.8", ngImport: i0, type: NgxCaptureComponent, decorators: [{
type: Component,
args: [{ selector: 'ngx-capture', template: `
<ng-content></ng-content>
<div class="overlay" #over>
<div class="rectangle" #rect></div>
</div>
`, styles: [".overlay{top:0;left:0;position:fixed;width:100vw;height:100vh}.rectangle{border:1px solid #ff0000;position:absolute}\n"] }]
}], ctorParameters: function () { return [{ type: i1.NgxCaptureService }]; }, propDecorators: { rectangle: [{
type: ViewChild,
args: ['rect', { static: true }]
}], overlay: [{
type: ViewChild,
args: ['over', { static: true }]
}], target: [{
type: Input
}], resultImage: [{
type: Output
}] } });
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{ Component, ElementRef, EventEmitter, Input, OnInit, Output, ViewChild } from '@angular/core';\r\nimport { Subject } from 'rxjs';\r\nimport { take, tap } from 'rxjs/operators';\r\nimport { CropDimensions, NgxCaptureService } from './ngx-capture.service';\r\n\r\ntype Point = {\r\n  x: number;\r\n  y: number;\r\n};\r\n\r\n@Component({\r\n  selector: 'ngx-capture',\r\n  template: `\r\n    <ng-content></ng-content>\r\n    <div class=\"overlay\" #over>\r\n      <div class=\"rectangle\" #rect></div>\r\n    </div>\r\n  `,\r\n  styleUrls: ['./ngx-capture.component.scss'],\r\n})\r\nexport class NgxCaptureComponent implements OnInit {\r\n  @ViewChild('rect', { static: true }) rectangle: ElementRef;\r\n  @ViewChild('over', { static: true }) overlay: ElementRef;\r\n\r\n  @Input() target: any;\r\n  @Output() resultImage = new EventEmitter<string>();\r\n\r\n  rect: HTMLElement;\r\n  captureZone: HTMLElement;\r\n\r\n  isDrawing = false;\r\n\r\n  mouseStart: Point = { x: 0, y: 0 };\r\n\r\n  cropDimensions: CropDimensions = {\r\n    x: 0,\r\n    y: 0,\r\n    width: 0,\r\n    height: 0,\r\n  };\r\n\r\n  destroy$ = new Subject<void>();\r\n\r\n  constructor(private captureService: NgxCaptureService) {}\r\n\r\n  ngOnInit() {\r\n    setTimeout(() => {\r\n      this.rect = this.rectangle.nativeElement;\r\n      this.captureZone = this.overlay.nativeElement;\r\n\r\n      if (!this.captureZone) {\r\n        console.warn('\"captureZone\" is not set');\r\n        return;\r\n      }\r\n\r\n      this.captureZone.onmousedown = (e) => this.startCapture(e);\r\n      this.captureZone.onmousemove = (e) => this.drawRect(e);\r\n      this.captureZone.onmouseup = () => this.endCapture();\r\n    }, 2000);\r\n  }\r\n\r\n  private startCapture(e: any) {\r\n    const mouse = this.setMousePosition(e, true);\r\n\r\n    this.isDrawing = true;\r\n\r\n    this.cropDimensions = {\r\n      x: mouse.x,\r\n      y: mouse.y,\r\n      width: 0,\r\n      height: 0,\r\n    };\r\n\r\n    this.captureZone.style.cursor = 'crosshair';\r\n  }\r\n\r\n  private drawRect(e: any) {\r\n    if (this.isDrawing) {\r\n      const mouse = this.setMousePosition(e, false);\r\n\r\n      this.cropDimensions = {\r\n        x: mouse.x - this.mouseStart.x < 0 ? mouse.x : this.mouseStart.x,\r\n        y: mouse.y - this.mouseStart.y < 0 ? mouse.y : this.mouseStart.y,\r\n        width: Math.abs(mouse.x - this.mouseStart.x),\r\n        height: Math.abs(mouse.y - this.mouseStart.y),\r\n      };\r\n      this.setRectangle();\r\n    }\r\n  }\r\n\r\n  private setMousePosition(e: any, isStart = false): Point {\r\n    const ev = e || window.event; // Moz || IE\r\n    const mouse: Point = { x: 0, y: 0 };\r\n\r\n    if (ev.pageX) {\r\n      // Moz\r\n      mouse.x = ev.clientX;\r\n      mouse.y = ev.clientY;\r\n    } else if (ev.clientX) {\r\n      // IE\r\n      mouse.x = ev.clientX + document.body.scrollLeft;\r\n      mouse.y = ev.clientY + document.body.scrollTop;\r\n    }\r\n\r\n    if (isStart) {\r\n      this.mouseStart.x = mouse.x;\r\n      this.mouseStart.y = mouse.y;\r\n    }\r\n\r\n    return mouse;\r\n  }\r\n\r\n  private endCapture() {\r\n    this.captureZone.style.cursor = 'default';\r\n    this.isDrawing = false;\r\n\r\n    this.captureService\r\n      .getImage(this.target, false, {\r\n        ...this.cropDimensions,\r\n        x: this.cropDimensions.x + window.scrollX,\r\n        y: this.cropDimensions.y + window.scrollY,\r\n      })\r\n      .pipe(\r\n        take(1),\r\n        tap((img) => {\r\n          this.resultImage.emit(img);\r\n        })\r\n      )\r\n      .subscribe();\r\n\r\n    this.cropDimensions = {\r\n      x: 0,\r\n      y: 0,\r\n      width: 0,\r\n      height: 0,\r\n    };\r\n    this.setRectangle();\r\n  }\r\n\r\n  private setRectangle() {\r\n    this.rect.style.left = this.cropDimensions.x + 'px';\r\n    this.rect.style.top = this.cropDimensions.y + 'px';\r\n    this.rect.style.width = this.cropDimensions.width + 'px';\r\n    this.rect.style.height = this.cropDimensions.height + 'px';\r\n  }\r\n}\r\n"]}