d9ae709b-3c27-4b69-b125-b8b80b54f90b

import {
    ChangeDetectionStrategy,
    Component,
    OnInit,
    ViewEncapsulation,
    ChangeDetectorRef,
    ElementRef,
    ViewChild,
    NgZone,
    OnDestroy,
    Output,
    EventEmitter
} from '@angular/core';
import { InternalImageInfo, ThyImageInfo, ThyImagePreviewMode, ThyImagePreviewOperation, ThyImagePreviewOptions } from '../image.class';
import { MixinBase, mixinUnsubscribe } from 'ngx-tethys/core';
import { fromEvent, Observable } from 'rxjs';
import { takeUntil } from 'rxjs/operators';
import { ThyDialog } from 'ngx-tethys/dialog';
import { getClientSize, getFitContentPosition, getOffset, humanizeBytes, isNumber, isUndefinedOrNull } from 'ngx-tethys/util';
import { ThyFullscreen } from 'ngx-tethys/fullscreen';
import { ThyCopyEvent, ThyCopyDirective } from 'ngx-tethys/copy';
import { ThyNotifyService } from 'ngx-tethys/notify';
import { DomSanitizer } from '@angular/platform-browser';
import { fetchImageBlob } from '../utils';
import { ThyDividerComponent } from 'ngx-tethys/divider';
import { ThyIconComponent } from 'ngx-tethys/icon';
import { ThyLoadingComponent } from 'ngx-tethys/loading';
import { CdkDrag } from '@angular/cdk/drag-drop';
import { ThyActionComponent, ThyActionsComponent } from 'ngx-tethys/action';
import { ThyTooltipDirective } from 'ngx-tethys/tooltip';
import { NgIf, NgFor } from '@angular/common';

const initialPosition = {
    x: 0,
    y: 0
};
const IMAGE_MAX_ZOOM = 3;
const IMAGE_MIN_ZOOM = 0.1;
const HORIZONTAL_SPACE = 100 * 2; // left: 100px; right: 100px
const VERTICAL_SPACE = 96 + 106; // top: 96px; bottom: 106px

/**
 * 图片预览组件
 * @name thy-image-preview
 * @order 20
 */
@Component({
    selector: 'thy-image-preview',
    exportAs: 'thyImagePreview',
    templateUrl: './image-preview.component.html',
    changeDetection: ChangeDetectionStrategy.OnPush,
    encapsulation: ViewEncapsulation.None,
    host: {
        class: 'thy-image-preview-wrap',
        '[class.thy-image-preview-moving]': 'isDragging'
    },
    standalone: true,
    imports: [
        NgIf,
        ThyTooltipDirective,
        ThyActionComponent,
        CdkDrag,
        NgFor,
        ThyLoadingComponent,
        ThyIconComponent,
        ThyActionsComponent,
        ThyDividerComponent,
        ThyCopyDirective
    ]
})
export class ThyImagePreviewComponent extends mixinUnsubscribe(MixinBase) implements OnInit, OnDestroy {
    @Output() downloadClicked: EventEmitter<ThyImageInfo> = new EventEmitter();
    images: InternalImageInfo[] = [];
    previewIndex: number = 0;
    previewConfig: ThyImagePreviewOptions;
    previewImageTransform = '';
    previewImageWrapperTransform = '';
    zoomDisabled = false;
    zoom: number = 1;
    position = { ...initialPosition };
    isDragging = false;
    isLoadingDone = false;
    isFullScreen = false;
    isInsideScreen = true;
    currentImageMode: ThyImagePreviewMode = 'original-scale';
    previewOperations: ThyImagePreviewOperation[];
    defaultPreviewOperations: ThyImagePreviewOperation[] = [
        {
            icon: 'zoom-out',
            name: '缩小',
            action: (image: ThyImageInfo) => {
                this.zoomOut();
            },
            type: 'zoom-out'
        },
        {
            icon: 'zoom-in',
            name: '放大',
            action: (image: ThyImageInfo) => {
                this.zoomIn();
            },
            type: 'zoom-in'
        },
        {
            icon: 'one-to-one',
            name: '原始比例',
            action: (image: ThyImageInfo) => {
                this.setOriginalSize();
            },
            type: 'original-scale'
        },
        {
            icon: 'max-view',
            name: '适应屏幕',
            action: () => {
                this.setFitScreen();
            },
            type: 'fit-screen'
        },
        {
            icon: 'expand-arrows',
            name: '全屏显示',
            action: () => {
                this.fullScreen();
            },
            type: 'full-screen'
        },
        {
            icon: 'rotate-right',
            name: '旋转',
            action: (image: ThyImageInfo) => {
                this.rotateRight();
            },
            type: 'rotate-right'
        },
        {
            icon: 'download',
            name: '下载',
            action: (image: ThyImageInfo) => {
                this.download(image);
            },
            type: 'download'
        },
        {
            icon: 'preview',
            name: '查看原图',
            action: () => {
                this.viewOriginal();
            },
            type: 'view-original'
        },
        {
            icon: 'link-insert',
            name: '复制链接',
            type: 'copyLink'
        }
    ];

    private rotate: number;

    get previewImage(): InternalImageInfo {
        const image = this.images[this.previewIndex];
        if (image.size) {
            image.size = isNumber(image.size) ? humanizeBytes(image.size) : image.size;
        }
        return image;
    }

    get previewImageOriginSrc() {
        let imageSrc = this.previewImage.origin?.src || this.previewImage.src;
        if (imageSrc.startsWith('./')) {
            return window.location.host + '/' + imageSrc.split('./')[1];
        }
        return imageSrc;
    }

    get defaultZoom(): number {
        if (this.previewConfig?.zoom && this.previewConfig?.zoom > 0) {
            return this.previewConfig.zoom >= IMAGE_MAX_ZOOM
                ? IMAGE_MAX_ZOOM
                : this.previewConfig.zoom <= IMAGE_MIN_ZOOM
                ? IMAGE_MIN_ZOOM
                : this.previewConfig.zoom;
        }
    }

    @ViewChild('imgRef', { static: false }) imageRef!: ElementRef<HTMLImageElement>;
    @ViewChild('imagePreviewWrapper', { static: true }) imagePreviewWrapper!: ElementRef<HTMLElement>;

    constructor(
        public thyDialog: ThyDialog,
        public thyFullscreen: ThyFullscreen,
        private cdr: ChangeDetectorRef,
        private ngZone: NgZone,
        private notifyService: ThyNotifyService,
        private host: ElementRef<HTMLElement>,
        private sanitizer: DomSanitizer
    ) {
        super();
    }

    ngOnInit(): void {
        this.initPreview();
        this.ngZone.runOutsideAngular(() => {
            fromEvent(this.host.nativeElement, 'click')
                .pipe(takeUntil(this.ngUnsubscribe$))
                .subscribe(event => {
                    if (
                        (event.target === event.currentTarget ||
                            (this.isInsideScreen && this.imagePreviewWrapper.nativeElement.contains(event.target as HTMLElement))) &&
                        !this.previewConfig?.disableClose
                    ) {
                        this.ngZone.run(() => !this.isFullScreen && this.thyDialog.close());
                    }
                });

            fromEvent(this.imagePreviewWrapper.nativeElement, 'mousedown')
                .pipe(takeUntil(this.ngUnsubscribe$))
                .subscribe(() => {
                    this.isDragging = !this.isInsideScreen && true;
                });
        });
    }

    setOriginalSize() {
        this.reset();
        this.currentImageMode = 'fit-screen';
        this.zoom = 1;
        this.updatePreviewImageTransform();
        this.calculateInsideScreen();
        this.isLoadingDone = true;
        this.cdr.detectChanges();
    }

    setFitScreen() {
        this.reset();
        this.isInsideScreen = true;
        this.updatePreviewImage();
    }

    useDefaultZoomUpdate(isUpdateImageWrapper: boolean) {
        this.zoom = this.defaultZoom;
        this.isLoadingDone = true;
        this.updatePreviewImageTransform();
        if (isUpdateImageWrapper) {
            this.updatePreviewImageWrapperTransform();
        }
        this.cdr.detectChanges();
    }

    useCalculateZoomUpdate(isUpdateImageWrapper?: boolean) {
        let img = new Image();
        img.src = this.previewImage.src;
        img.onload = () => {
            const { width: offsetWidth, height: offsetHeight } = getClientSize();
            const innerWidth = offsetWidth - HORIZONTAL_SPACE;
            const innerHeight = offsetHeight - VERTICAL_SPACE;
            const { naturalWidth, naturalHeight } = img;
            const xRatio = innerWidth / naturalWidth;
            const yRatio = innerHeight / naturalHeight;
            const zoom = Math.min(xRatio, yRatio);
            if (zoom > 1) {
                this.zoom = 1;
            } else {
                this.zoom = zoom;
            }
            this.isLoadingDone = true;
            this.updatePreviewImageTransform();
            if (isUpdateImageWrapper) {
                this.updatePreviewImageWrapperTransform();
            }
            this.cdr.detectChanges();
        };
    }

    updatePreviewImage() {
        this.resolvePreviewImage().subscribe(result => {
            if (!result) {
                // error
                this.isLoadingDone = true;
                return;
            }
            // image size
            if (!this.previewImage.size && this.previewImage.blob) {
                this.previewImage.size = humanizeBytes(this.previewImage.blob.size);
            }
            if (this.defaultZoom) {
                this.useDefaultZoomUpdate(true);
            } else {
                this.useCalculateZoomUpdate();
            }
        });
    }

    resolvePreviewImage() {
        return new Observable<Boolean>(subscriber => {
            if (this.previewImage.src.startsWith('blob:')) {
                this.previewImage.objectURL = this.sanitizer.bypassSecurityTrustUrl(this.previewImage.src);
                subscriber.next(true);
                subscriber.complete();
                return;
            }
            if (this.previewImage.objectURL || !this.previewConfig.resolveSize) {
                subscriber.next(true);
                subscriber.complete();
            } else {
                fetchImageBlob(this.previewImage.src).subscribe(
                    blob => {
                        const urlCreator = window.URL || window.webkitURL;
                        const objectURL = urlCreator.createObjectURL(blob);
                        this.previewImage.objectURL = this.sanitizer.bypassSecurityTrustUrl(objectURL);
                        this.previewImage.blob = blob;
                        subscriber.next(true);
                        subscriber.complete();
                    },
                    error => {
                        subscriber.next(false);
                        subscriber.complete();
                    }
                );
            }
        });
    }

    initPreview() {
        if (Array.isArray(this.previewConfig?.operations) && this.previewConfig?.operations.length) {
            this.previewOperations = this.defaultPreviewOperations.filter(item => this.previewConfig.operations.includes(item.type));
        } else {
            this.previewOperations = this.defaultPreviewOperations;
        }
        this.rotate = this.previewConfig?.rotate ?? 0;
        this.updatePreviewImage();
    }

    download(image: ThyImageInfo) {
        this.downloadClicked.emit(image);
        const src = image.origin?.src || image.src;
        fetchImageBlob(src)
            .pipe(takeUntil(this.ngUnsubscribe$))
            .subscribe(blob => {
                const urlCreator = window.URL || window.webkitURL;
                const objectURL = urlCreator.createObjectURL(blob);
                let a = document.createElement('a');
                a.download = image.name || 'default.png';
                a.href = objectURL;
                a.click();
            });
    }

    zoomIn(): void {
        if (this.zoom < IMAGE_MAX_ZOOM) {
            this.zoom = Math.min(this.zoom + 0.1, IMAGE_MAX_ZOOM);
            this.calculateInsideScreen();
            this.updatePreviewImageTransform();
            this.position = { ...initialPosition };
        }
    }

    zoomOut(): void {
        if (this.zoom > IMAGE_MIN_ZOOM) {
            this.zoom = Math.max(this.zoom - 0.1, IMAGE_MIN_ZOOM);
            this.calculateInsideScreen();
            this.updatePreviewImageTransform();
            this.position = { ...initialPosition };
        }
    }

    calculateInsideScreen() {
        const width = this.imageRef.nativeElement.offsetWidth * this.zoom;
        const height = this.imageRef.nativeElement.offsetHeight * this.zoom;
        const { width: clientWidth, height: clientHeight } = getClientSize();
        if (width >= clientWidth || height >= clientHeight) {
            this.isInsideScreen = false;
        } else {
            this.isInsideScreen = true;
        }
    }

    viewOriginal() {
        window.open(this.previewImage?.origin?.src || this.previewImage.src, '_blank');
    }

    rotateRight(): void {
        this.rotate += 90;
        this.updatePreviewImageTransform();
    }

    fullScreen(): void {
        const targetElement = this.host.nativeElement.querySelector('.thy-image-preview');
        this.isFullScreen = true;
        const fullscreenRef = this.thyFullscreen.launch({
            target: targetElement
        });
        fullscreenRef.afterExited().subscribe(() => {
            this.isFullScreen = false;
            this.cdr.markForCheck();
        });
    }

    copyLink(event: ThyCopyEvent) {
        if (event.isSuccess) {
            this.notifyService.success('复制图片地址成功');
        } else {
            this.notifyService.error('复制图片地址失败');
        }
    }

    prev() {
        if (this.previewIndex > 0) {
            this.previewIndex--;
            this.isLoadingDone = false;
            this.reset();
            this.updatePreviewImage();
        }
    }

    next() {
        if (this.previewIndex < this.images.length - 1) {
            this.previewIndex++;
            this.isLoadingDone = false;
            this.reset();
            this.updatePreviewImage();
        }
    }

    dragReleased() {
        this.isDragging = false;
        const width = this.imageRef.nativeElement.offsetWidth * this.zoom;
        const height = this.imageRef.nativeElement.offsetHeight * this.zoom;
        const { left, top } = getOffset(this.imageRef.nativeElement, window);
        const { width: clientWidth, height: clientHeight } = getClientSize();
        const isRotate = this.rotate % 180 !== 0;
        const fitContentParams = {
            width: isRotate ? height : width,
            height: isRotate ? width : height,
            left,
            top,
            clientWidth,
            clientHeight
        };
        const fitContentPos = getFitContentPosition(fitContentParams);
        if (!isUndefinedOrNull(fitContentPos.x) || !isUndefinedOrNull(fitContentPos.y)) {
            this.position = { ...this.position, ...fitContentPos };
        }
    }

    private reset(): void {
        this.currentImageMode = 'original-scale';
        this.rotate = this.previewConfig?.rotate ?? 0;
        this.position = { ...initialPosition };
        this.cdr.detectChanges();
    }

    private updatePreviewImageTransform(): void {
        this.previewImageTransform = `scale3d(${this.zoom}, ${this.zoom}, 1) rotate(${this.rotate}deg)`;
    }

    private updatePreviewImageWrapperTransform(): void {
        this.previewImageWrapperTransform = `translate3d(${this.position.x}px, ${this.position.y}px, 0)`;
    }

    ngOnDestroy(): void {
        super.ngOnDestroy();
    }
}

1	import {
2	ChangeDetectionStrategy,
3	Component,
4	OnInit,
5	ViewEncapsulation,
6	ChangeDetectorRef,
7	ElementRef,
8	ViewChild,
9	NgZone,
10	OnDestroy,
11	Output,
12	EventEmitter
13	} from '@angular/core';
14	import { InternalImageInfo, ThyImageInfo, ThyImagePreviewMode, ThyImagePreviewOperation, ThyImagePreviewOptions } from '../image.class';
15	import { MixinBase, mixinUnsubscribe } from 'ngx-tethys/core';
16	import { fromEvent, Observable } from 'rxjs';
17	import { takeUntil } from 'rxjs/operators';
18	import { ThyDialog } from 'ngx-tethys/dialog';
19	import { getClientSize, getFitContentPosition, getOffset, humanizeBytes, isNumber, isUndefinedOrNull } from 'ngx-tethys/util';
20	import { ThyFullscreen } from 'ngx-tethys/fullscreen';
21	import { ThyCopyEvent, ThyCopyDirective } from 'ngx-tethys/copy';	1✔
22	import { ThyNotifyService } from 'ngx-tethys/notify';
23	import { DomSanitizer } from '@angular/platform-browser';
24	import { fetchImageBlob } from '../utils';
25	import { ThyDividerComponent } from 'ngx-tethys/divider';	1✔
26	import { ThyIconComponent } from 'ngx-tethys/icon';	1✔
27	import { ThyLoadingComponent } from 'ngx-tethys/loading';	1✔
28	import { CdkDrag } from '@angular/cdk/drag-drop';	1✔
29	import { ThyActionComponent, ThyActionsComponent } from 'ngx-tethys/action';
30	import { ThyTooltipDirective } from 'ngx-tethys/tooltip';
31	import { NgIf, NgFor } from '@angular/common';
32
33	const initialPosition = {
34	x: 0,	1✔
35	y: 0
36	};	×
37	const IMAGE_MAX_ZOOM = 3;	×
38	const IMAGE_MIN_ZOOM = 0.1;	×
39	const HORIZONTAL_SPACE = 100 * 2; // left: 100px; right: 100px
40	const VERTICAL_SPACE = 96 + 106; // top: 96px; bottom: 106px	×
41
42	/**
43	* 图片预览组件	×
44	* @name thy-image-preview	×
45	* @order 20	×
46	*/
47	@Component({	×
48	selector: 'thy-image-preview',
49	exportAs: 'thyImagePreview',
50	templateUrl: './image-preview.component.html',	×
51	changeDetection: ChangeDetectionStrategy.OnPush,	×
52	encapsulation: ViewEncapsulation.None,
53	host: {	×
54	class: 'thy-image-preview-wrap',
55	'[class.thy-image-preview-moving]': 'isDragging'
56	},
57	standalone: true,
58	imports: [
59	NgIf,	×
60	ThyTooltipDirective,	×
61	ThyActionComponent,	×
62	CdkDrag,	×
63	NgFor,	×
64	ThyLoadingComponent,	×
65	ThyIconComponent,	×
66	ThyActionsComponent,	×
67	ThyDividerComponent,	×
68	ThyCopyDirective	×
69	]	×
70	})	×
71	export class ThyImagePreviewComponent extends mixinUnsubscribe(MixinBase) implements OnInit, OnDestroy {	×
72	@Output() downloadClicked: EventEmitter<ThyImageInfo> = new EventEmitter();	×
73	images: InternalImageInfo[] = [];	×
74	previewIndex: number = 0;	×
75	previewConfig: ThyImagePreviewOptions;	×
76	previewImageTransform = '';	×
77	previewImageWrapperTransform = '';	×
78	zoomDisabled = false;	×
79	zoom: number = 1;	×
80	position = { ...initialPosition };	×
81	isDragging = false;
82	isLoadingDone = false;
83	isFullScreen = false;
84	isInsideScreen = true;
85	currentImageMode: ThyImagePreviewMode = 'original-scale';	×
86	previewOperations: ThyImagePreviewOperation[];
87	defaultPreviewOperations: ThyImagePreviewOperation[] = [
88	{
89	icon: 'zoom-out',
90	name: '缩小',
91	action: (image: ThyImageInfo) => {
92	this.zoomOut();
93	},	×
94	type: 'zoom-out'
95	},
96	{
97	icon: 'zoom-in',
98	name: '放大',
99	action: (image: ThyImageInfo) => {
100	this.zoomIn();
101	},	×
102	type: 'zoom-in'
103	},
104	{
105	icon: 'one-to-one',
106	name: '原始比例',
107	action: (image: ThyImageInfo) => {
108	this.setOriginalSize();
109	},	×
110	type: 'original-scale'
111	},
112	{
113	icon: 'max-view',
114	name: '适应屏幕',
115	action: () => {
116	this.setFitScreen();
117	},	×
118	type: 'fit-screen'
119	},
120	{
121	icon: 'expand-arrows',
122	name: '全屏显示',
123	action: () => {
124	this.fullScreen();
125	},	×
126	type: 'full-screen'
127	},
128	{
129	icon: 'rotate-right',
130	name: '旋转',
131	action: (image: ThyImageInfo) => {
132	this.rotateRight();
133	},	×
134	type: 'rotate-right'
135	},
136	{
137	icon: 'download',
138	name: '下载',
139	action: (image: ThyImageInfo) => {
140	this.download(image);
141	},	×
142	type: 'download'
143	},
144	{
145	icon: 'preview',
146	name: '查看原图',
147	action: () => {
148	this.viewOriginal();
149	},
150	type: 'view-original'
151	},
152	{
153	icon: 'link-insert',	×
154	name: '复制链接',	×
155	type: 'copyLink'	×
156	}
157	];
158		×
159	private rotate: number;
160
161	get previewImage(): InternalImageInfo {	×
162	const image = this.images[this.previewIndex];
163	if (image.size) {
164	image.size = isNumber(image.size) ? humanizeBytes(image.size) : image.size;	×
165	}
166	return image;
167	}	×
168
169	get previewImageOriginSrc() {
170	let imageSrc = this.previewImage.origin?.src \|\| this.previewImage.src;
171	if (imageSrc.startsWith('./')) {
172	return window.location.host + '/' + imageSrc.split('./')[1];	×
173	}	×
174	return imageSrc;	×
175	}	×
176		×
177	get defaultZoom(): number {	×
178	if (this.previewConfig?.zoom && this.previewConfig?.zoom > 0) {	×
179	return this.previewConfig.zoom >= IMAGE_MAX_ZOOM
180	? IMAGE_MAX_ZOOM
181	: this.previewConfig.zoom <= IMAGE_MIN_ZOOM	×
182	? IMAGE_MIN_ZOOM	×
183	: this.previewConfig.zoom;	×
184	}
185	}
186		×
187	@ViewChild('imgRef', { static: false }) imageRef!: ElementRef<HTMLImageElement>;	×
188	@ViewChild('imagePreviewWrapper', { static: true }) imagePreviewWrapper!: ElementRef<HTMLElement>;	×
189		×
190	constructor(	×
191	public thyDialog: ThyDialog,
192	public thyFullscreen: ThyFullscreen,	×
193	private cdr: ChangeDetectorRef,
194	private ngZone: NgZone,
195	private notifyService: ThyNotifyService,	×
196	private host: ElementRef<HTMLElement>,	×
197	private sanitizer: DomSanitizer	×
198	) {	×
199	super();	×
200	}	×
201		×
202	ngOnInit(): void {	×
203	this.initPreview();	×
204	this.ngZone.runOutsideAngular(() => {	×
205	fromEvent(this.host.nativeElement, 'click')	×
206	.pipe(takeUntil(this.ngUnsubscribe$))	×
207	.subscribe(event => {
208	if (
209	(event.target === event.currentTarget \|\|	×
210	(this.isInsideScreen && this.imagePreviewWrapper.nativeElement.contains(event.target as HTMLElement))) &&
211	!this.previewConfig?.disableClose	×
212	) {	×
213	this.ngZone.run(() => !this.isFullScreen && this.thyDialog.close());	×
214	}	×
215	});
216		×
217	fromEvent(this.imagePreviewWrapper.nativeElement, 'mousedown')
218	.pipe(takeUntil(this.ngUnsubscribe$))
219	.subscribe(() => {
220	this.isDragging = !this.isInsideScreen && true;	×
221	});	×
222	});
223	}	×
224		×
225	setOriginalSize() {
226	this.reset();
227	this.currentImageMode = 'fit-screen';	×
228	this.zoom = 1;	×
229	this.updatePreviewImageTransform();
230	this.calculateInsideScreen();	×
231	this.isLoadingDone = true;	×
232	this.cdr.detectChanges();
233	}
234		×
235	setFitScreen() {
236	this.reset();
237	this.isInsideScreen = true;
238	this.updatePreviewImage();
239	}	×
240		×
241	useDefaultZoomUpdate(isUpdateImageWrapper: boolean) {	×
242	this.zoom = this.defaultZoom;	×
243	this.isLoadingDone = true;	×
244	this.updatePreviewImageTransform();	×
245	if (isUpdateImageWrapper) {
246	this.updatePreviewImageWrapperTransform();	×
247	}	×
248	this.cdr.detectChanges();	×
249	}
250
251	useCalculateZoomUpdate(isUpdateImageWrapper?: boolean) {	×
252	let img = new Image();	×
253	img.src = this.previewImage.src;	×
254	img.onload = () => {	×
255	const { width: offsetWidth, height: offsetHeight } = getClientSize();	×
256	const innerWidth = offsetWidth - HORIZONTAL_SPACE;	×
257	const innerHeight = offsetHeight - VERTICAL_SPACE;	×
258	const { naturalWidth, naturalHeight } = img;
259	const xRatio = innerWidth / naturalWidth;	×
260	const yRatio = innerHeight / naturalHeight;	×
261	const zoom = Math.min(xRatio, yRatio);
262	if (zoom > 1) {
263	this.zoom = 1;
264	} else {
265	this.zoom = zoom;
266	}	×
267	this.isLoadingDone = true;	×
268	this.updatePreviewImageTransform();
269	if (isUpdateImageWrapper) {
270	this.updatePreviewImageWrapperTransform();	×
271	}
272	this.cdr.detectChanges();	×
273	};	×
274	}
275
276	updatePreviewImage() {	×
277	this.resolvePreviewImage().subscribe(result => {	×
278	if (!result) {	×
279	// error
280	this.isLoadingDone = true;
281	return;	×
282	}	×
283	// image size	×
284	if (!this.previewImage.size && this.previewImage.blob) {	×
285	this.previewImage.size = humanizeBytes(this.previewImage.blob.size);	×
286	}	×
287	if (this.defaultZoom) {
288	this.useDefaultZoomUpdate(true);
289	} else {
290	this.useCalculateZoomUpdate();	×
291	}	×
292	});	×
293	}	×
294		×
295	resolvePreviewImage() {
296	return new Observable<Boolean>(subscriber => {
297	if (this.previewImage.src.startsWith('blob:')) {
298	this.previewImage.objectURL = this.sanitizer.bypassSecurityTrustUrl(this.previewImage.src);	×
299	subscriber.next(true);	×
300	subscriber.complete();	×
301	return;	×
302	}	×
303	if (this.previewImage.objectURL \|\| !this.previewConfig.resolveSize) {
304	subscriber.next(true);
305	subscriber.complete();
306	} else {	×
307	fetchImageBlob(this.previewImage.src).subscribe(	×
308	blob => {	×
309	const urlCreator = window.URL \|\| window.webkitURL;	×
310	const objectURL = urlCreator.createObjectURL(blob);	×
311	this.previewImage.objectURL = this.sanitizer.bypassSecurityTrustUrl(objectURL);
312	this.previewImage.blob = blob;
313	subscriber.next(true);	×
314	subscriber.complete();
315	},
316	error => {
317	subscriber.next(false);	×
318	subscriber.complete();
319	}
320	);	×
321	}	×
322	});
323	}
324		×
325	initPreview() {	×
326	if (Array.isArray(this.previewConfig?.operations) && this.previewConfig?.operations.length) {	×
327	this.previewOperations = this.defaultPreviewOperations.filter(item => this.previewConfig.operations.includes(item.type));
328	} else {
329	this.previewOperations = this.defaultPreviewOperations;	×
330	}	×
331	this.rotate = this.previewConfig?.rotate ?? 0;	×
332	this.updatePreviewImage();
333	}
334
335	download(image: ThyImageInfo) {	×
336	this.downloadClicked.emit(image);	×
337	const src = image.origin?.src \|\| image.src;
338	fetchImageBlob(src)
339	.pipe(takeUntil(this.ngUnsubscribe$))	×
340	.subscribe(blob => {
341	const urlCreator = window.URL \|\| window.webkitURL;
342	const objectURL = urlCreator.createObjectURL(blob);
343	let a = document.createElement('a');	×
344	a.download = image.name \|\| 'default.png';	×
345	a.href = objectURL;	×
346	a.click();	×
347	});	×
348	}
349
350	zoomIn(): void {
351	if (this.zoom < IMAGE_MAX_ZOOM) {	×
352	this.zoom = Math.min(this.zoom + 0.1, IMAGE_MAX_ZOOM);	×
353	this.calculateInsideScreen();	×
354	this.updatePreviewImageTransform();	×
355	this.position = { ...initialPosition };	×
356	}
357	}
358
359	zoomOut(): void {	×
360	if (this.zoom > IMAGE_MIN_ZOOM) {	×
361	this.zoom = Math.max(this.zoom - 0.1, IMAGE_MIN_ZOOM);	×
362	this.calculateInsideScreen();	×
363	this.updatePreviewImageTransform();	×
364	this.position = { ...initialPosition };	×
365	}	×
366	}	×
367		×
368	calculateInsideScreen() {
369	const width = this.imageRef.nativeElement.offsetWidth * this.zoom;
370	const height = this.imageRef.nativeElement.offsetHeight * this.zoom;
371	const { width: clientWidth, height: clientHeight } = getClientSize();
372	if (width >= clientWidth \|\| height >= clientHeight) {
373	this.isInsideScreen = false;	×
374	} else {	×
375	this.isInsideScreen = true;	×
376	}
377	}
378
379	viewOriginal() {	×
380	window.open(this.previewImage?.origin?.src \|\| this.previewImage.src, '_blank');	×
381	}	×
382		×
383	rotateRight(): void {
384	this.rotate += 90;
385	this.updatePreviewImageTransform();	×
386	}
387
388	fullScreen(): void {	×
389	const targetElement = this.host.nativeElement.querySelector('.thy-image-preview');
390	this.isFullScreen = true;
391	const fullscreenRef = this.thyFullscreen.launch({	×
392	target: targetElement
393	});	1✔
394	fullscreenRef.afterExited().subscribe(() => {
395	this.isFullScreen = false;
396	this.cdr.markForCheck();
397	});
398	}
399
400	copyLink(event: ThyCopyEvent) {
401	if (event.isSuccess) {
402	this.notifyService.success('复制图片地址成功');	1✔
403	} else {
404	this.notifyService.error('复制图片地址失败');
405	}
406	}
407
408	prev() {	1✔
409	if (this.previewIndex > 0) {
410	this.previewIndex--;
411	this.isLoadingDone = false;
412	this.reset();
413	this.updatePreviewImage();
414	}
415	}
416
417	next() {
418	if (this.previewIndex < this.images.length - 1) {
419	this.previewIndex++;
420	this.isLoadingDone = false;
421	this.reset();
422	this.updatePreviewImage();
423	}
424	}
425
426	dragReleased() {
427	this.isDragging = false;
428	const width = this.imageRef.nativeElement.offsetWidth * this.zoom;
429	const height = this.imageRef.nativeElement.offsetHeight * this.zoom;
430	const { left, top } = getOffset(this.imageRef.nativeElement, window);
431	const { width: clientWidth, height: clientHeight } = getClientSize();
432	const isRotate = this.rotate % 180 !== 0;
433	const fitContentParams = {
434	width: isRotate ? height : width,
435	height: isRotate ? width : height,
436	left,
437	top,
438	clientWidth,
439	clientHeight
440	};
441	const fitContentPos = getFitContentPosition(fitContentParams);
442	if (!isUndefinedOrNull(fitContentPos.x) \|\| !isUndefinedOrNull(fitContentPos.y)) {
443	this.position = { ...this.position, ...fitContentPos };
444	}
445	}
446
447	private reset(): void {
448	this.currentImageMode = 'original-scale';
449	this.rotate = this.previewConfig?.rotate ?? 0;
450	this.position = { ...initialPosition };
451	this.cdr.detectChanges();
452	}
453
454	private updatePreviewImageTransform(): void {
455	this.previewImageTransform = `scale3d(${this.zoom}, ${this.zoom}, 1) rotate(${this.rotate}deg)`;
456	}
457
458	private updatePreviewImageWrapperTransform(): void {
459	this.previewImageWrapperTransform = `translate3d(${this.position.x}px, ${this.position.y}px, 0)`;
460	}
461
462	ngOnDestroy(): void {
463	super.ngOnDestroy();
464	}
465	}

atinc / ngx-tethys / d9ae709b-3c27-4b69-b125-b8b80b54f90b

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