gentics-ui-core
Version:
This is the common core framework for the Gentics CMS and Mesh UI, and other Angular applications.
219 lines • 28.6 kB
JavaScript
import { Directive, ElementRef, EventEmitter, Inject, Input, NgZone } from '@angular/core';
import { InjectionToken, Optional, Output } from '@angular/core';
import { Observable } from 'rxjs';
import { map } from 'rxjs/operators';
import { clientReportsMimeTypesOnDrag, getDataTransfer, transferHasFiles } from './drag-drop-utils';
import { DragStateTrackerFactory } from './drag-state-tracker.service';
import { matchesMimeType } from './matches-mime-type';
import { PageFileDragHandler } from './page-file-drag-handler.service';
import * as i0 from "@angular/core";
import * as i1 from "./page-file-drag-handler.service";
import * as i2 from "./drag-state-tracker.service";
const defaultOptions = {
accept: '*',
disabled: false,
multiple: true
};
/**
* A token that can be used to inject a mock into the directive
* @internal
*/
export const FILE_DROPAREA_DRAG_EVENT_TARGET = new InjectionToken('FILE_DROPAREA_DRAG_EVENT_TARGET');
/**
* File upload area that accepts files via drag and drop.
*
* ```html
* <gtx-file-drop-area (fileDrop)="files = $event">Upload files via drag & drop</gtx-file-drop-area>
* <div gtx-file-drop-area (fileDrop)="files = $event">Upload files via drag & drop</div>
* ```
*/
export class FileDropArea {
constructor(elementRef, dragEventTarget, pageDrag, fileDrag, zone) {
this.pageDrag = pageDrag;
this.fileDrag = fileDrag;
/**
* Fires when a file or files are dragged over the drop area.
*/
this.fileDragEnter = new EventEmitter();
/**
* Fires when a file or files are dragged out of the drop area.
*/
this.fileDragLeave = new EventEmitter();
/**
* Fires when a file or files are dropped on the drop area.
*/
this.fileDrop = new EventEmitter();
/**
* Fires when a file or files which do not match the "accepted" option
* are dropped on the drop area.
*/
this.fileDropReject = new EventEmitter();
/**
* Fires when a file or files are dragged into the page.
*/
this.pageDragEnter = new EventEmitter();
/**
* Fires when a file or files is dragged out of the page.
*/
this.pageDragLeave = new EventEmitter();
this._draggedFiles = [];
this._isDraggedOver = false;
this._isPageDraggedOver = false;
this._filesDraggedInPage = [];
this._options = defaultOptions;
this._subscriptions = [];
this.accepts = (file) => {
return !clientReportsMimeTypesOnDrag() || matchesMimeType(file.type, this._options.accept);
};
this.onDragEnterOver = (event) => {
let transfer = getDataTransfer(event);
if (!transferHasFiles(transfer)) {
return;
}
if (this._isDraggedOver && !this._options.disabled) {
transfer.dropEffect = 'copy';
}
else {
transfer.dropEffect = 'none';
transfer.effectAllowed = 'none';
}
event.preventDefault();
};
this.onDrop = (event) => {
let transfer = getDataTransfer(event);
if (event.defaultPrevented || !transferHasFiles(transfer) || this._options.disabled) {
return;
}
event.preventDefault();
transfer.dropEffect = 'copy';
let files = Array.from(transfer.files);
let acceptedFiles = [];
let rejectedFiles = [];
// Check if the dropped files match the "accept" option
for (let file of files) {
if (matchesMimeType(file.type, this._options.accept)) {
acceptedFiles.push(file);
}
else {
rejectedFiles.push(file);
}
}
if (acceptedFiles.length > 0) {
this.fileDrop.emit(acceptedFiles);
}
if (rejectedFiles.length > 0) {
this.fileDropReject.emit(rejectedFiles);
}
};
this._eventTarget = dragEventTarget || elementRef.nativeElement;
this.draggedFiles$ = fileDrag.trackElement(this._eventTarget).pipe(map(files => files.filter(this.accepts)));
this.filesDraggedInPage$ = pageDrag.filesDragged$.pipe(map(files => files.filter(this.accepts)));
this._subscriptions = [
this.draggedFiles$.subscribe(files => {
zone.runGuarded(() => {
this._isDraggedOver = files.length > 0;
this._draggedFiles = files;
if (files.length > 0) {
this.fileDragEnter.emit(files);
}
else {
this.fileDragLeave.emit(undefined);
}
});
}),
this.filesDraggedInPage$.subscribe(filesInPage => {
zone.runGuarded(() => {
this._isPageDraggedOver = filesInPage.length > 0;
this._filesDraggedInPage = filesInPage;
if (filesInPage.length > 0) {
this.pageDragEnter.emit(filesInPage);
}
else {
this.pageDragLeave.emit(undefined);
}
});
})
];
}
/**
* Returns true if an accepted file is dragged on the drop area.
*/
get dragHovered() {
return this._isDraggedOver;
}
/**
* Returns a list of mime types of accepted files dragged over the drop area.
*/
get draggedFiles() {
return this._draggedFiles;
}
/**
* Returns true if an accepted file is dragged on the page.
*/
get pageDragHovered() {
return this._isPageDraggedOver;
}
/**
* If accepted files are dragged inside the current page / browser tab,
* returns a list of the dragged file types, `undefined` otherwise.
*/
get filesDraggedInPage() {
return this._filesDraggedInPage;
}
/**
* Sets options of this drop area.
*/
get options() {
return this._options;
}
set options(options) {
this._options = Object.freeze(Object.assign({}, defaultOptions, options));
}
ngOnInit() {
this._eventTarget.addEventListener('dragenter', this.onDragEnterOver);
this._eventTarget.addEventListener('dragover', this.onDragEnterOver);
this._eventTarget.addEventListener('drop', this.onDrop);
}
ngOnDestroy() {
this._subscriptions.forEach(s => s.unsubscribe());
this._eventTarget.removeEventListener('dragenter', this.onDragEnterOver);
this._eventTarget.removeEventListener('dragover', this.onDragEnterOver);
this._eventTarget.removeEventListener('drop', this.onDrop);
this.pageDrag.destroy();
}
}
/** @nocollapse */ FileDropArea.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "13.3.8", ngImport: i0, type: FileDropArea, deps: [{ token: i0.ElementRef }, { token: FILE_DROPAREA_DRAG_EVENT_TARGET, optional: true }, { token: i1.PageFileDragHandler }, { token: i2.DragStateTrackerFactory }, { token: i0.NgZone }], target: i0.ɵɵFactoryTarget.Directive });
/** @nocollapse */ FileDropArea.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "12.0.0", version: "13.3.8", type: FileDropArea, selector: "gtx-file-drop-area, [gtxFileDropArea]", inputs: { options: ["gtxFileDropArea", "options"] }, outputs: { draggedFiles$: "draggedFiles$", filesDraggedInPage$: "filesDraggedInPage$", fileDragEnter: "fileDragEnter", fileDragLeave: "fileDragLeave", fileDrop: "fileDrop", fileDropReject: "fileDropReject", pageDragEnter: "pageDragEnter", pageDragLeave: "pageDragLeave" }, providers: [DragStateTrackerFactory, PageFileDragHandler], exportAs: ["gtxFileDropArea"], ngImport: i0 });
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "13.3.8", ngImport: i0, type: FileDropArea, decorators: [{
type: Directive,
args: [{
selector: 'gtx-file-drop-area, [gtxFileDropArea]',
exportAs: 'gtxFileDropArea',
providers: [DragStateTrackerFactory, PageFileDragHandler]
}]
}], ctorParameters: function () { return [{ type: i0.ElementRef }, { type: undefined, decorators: [{
type: Optional
}, {
type: Inject,
args: [FILE_DROPAREA_DRAG_EVENT_TARGET]
}] }, { type: i1.PageFileDragHandler }, { type: i2.DragStateTrackerFactory }, { type: i0.NgZone }]; }, propDecorators: { options: [{
type: Input,
args: ['gtxFileDropArea']
}], draggedFiles$: [{
type: Output
}], filesDraggedInPage$: [{
type: Output
}], fileDragEnter: [{
type: Output
}], fileDragLeave: [{
type: Output
}], fileDrop: [{
type: Output
}], fileDropReject: [{
type: Output
}], pageDragEnter: [{
type: Output
}], pageDragLeave: [{
type: Output
}] } });
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{Directive, ElementRef, EventEmitter, Inject, Input, NgZone} from '@angular/core';\nimport {InjectionToken, OnDestroy, OnInit, Optional, Output} from '@angular/core';\nimport {Observable, Subscription} from 'rxjs';\nimport {map} from 'rxjs/operators';\n\nimport {clientReportsMimeTypesOnDrag, getDataTransfer, transferHasFiles} from './drag-drop-utils';\nimport {DragStateTrackerFactory, FileDragState} from './drag-state-tracker.service';\nimport {matchesMimeType} from './matches-mime-type';\nimport {PageFileDragHandler} from './page-file-drag-handler.service';\n\nexport interface IFileDropAreaOptions {\n    /**\n     * A list of mime types accepted by the drop area. Defaults to \"*\".\n     * Some mime types will not be reported by the client, they get matched as \"unknown/unknown\".\n     * @example\n     *   { accept: 'image/*, !image/gif' }\n     *   { accept: 'text/*' }\n     *   { accept: 'video/*, unknown/*' }\n     */\n    accept?: string;\n\n    /**\n     * Set to true to prevent interaction with the drop area.\n     */\n    disabled?: boolean;\n\n    /**\n     * Allow multiple files to be dropped on the drop area. Defaults to true.\n     */\n    multiple?: boolean;\n}\n\nconst defaultOptions: IFileDropAreaOptions = {\n    accept: '*',\n    disabled: false,\n    multiple: true\n};\n\nexport interface IDraggedFile {\n    type: string;\n}\n\n/**\n * A token that can be used to inject a mock into the directive\n * @internal\n */\nexport const FILE_DROPAREA_DRAG_EVENT_TARGET = new InjectionToken('FILE_DROPAREA_DRAG_EVENT_TARGET');\n\n\n/**\n * File upload area that accepts files via drag and drop.\n *\n * ```html\n * <gtx-file-drop-area (fileDrop)=\"files = $event\">Upload files via drag & drop</gtx-file-drop-area>\n * <div gtx-file-drop-area (fileDrop)=\"files = $event\">Upload files via drag & drop</div>\n * ```\n */\n@Directive({\n    selector: 'gtx-file-drop-area, [gtxFileDropArea]',\n    exportAs: 'gtxFileDropArea',\n    providers: [DragStateTrackerFactory, PageFileDragHandler]\n})\nexport class FileDropArea implements OnInit, OnDestroy {\n\n    /**\n     * Returns true if an accepted file is dragged on the drop area.\n     */\n    public get dragHovered(): boolean {\n        return this._isDraggedOver;\n    }\n\n    /**\n     * Returns a list of mime types of accepted files dragged over the drop area.\n     */\n    public get draggedFiles(): FileDragState {\n        return this._draggedFiles;\n    }\n\n    /**\n     * Returns true if an accepted file is dragged on the page.\n     */\n    public get pageDragHovered(): boolean {\n        return this._isPageDraggedOver;\n    }\n\n    /**\n     * If accepted files are dragged inside the current page / browser tab,\n     * returns a list of the dragged file types, `undefined` otherwise.\n     */\n    public get filesDraggedInPage(): FileDragState {\n        return this._filesDraggedInPage;\n    }\n\n    /**\n     * Sets options of this drop area.\n     */\n    @Input('gtxFileDropArea') get options(): IFileDropAreaOptions {\n        return this._options;\n    }\n    set options(options: IFileDropAreaOptions) {\n        this._options = Object.freeze(Object.assign({}, defaultOptions, options));\n    }\n\n    /**\n     * Emits a list when files are dragged over the drop area, `undefined` otherwise.\n     * Can be used with AsyncPipe for change detection and subscription handling.\n     */\n    @Output() draggedFiles$: Observable<FileDragState>;\n\n    /**\n     * Emits a list when files are dragged over the drop area, `false` otherwise.\n     * Can be used with AsyncPipe for change detection and subscription handling.\n     */\n    @Output() filesDraggedInPage$: Observable<FileDragState>;\n\n    /**\n     * Fires when a file or files are dragged over the drop area.\n     */\n    @Output() fileDragEnter = new EventEmitter<FileDragState>();\n\n    /**\n     * Fires when a file or files are dragged out of the drop area.\n     */\n    @Output() fileDragLeave = new EventEmitter<void>();\n\n    /**\n     * Fires when a file or files are dropped on the drop area.\n     */\n    @Output() fileDrop = new EventEmitter<File[]>();\n\n    /**\n     * Fires when a file or files which do not match the \"accepted\" option\n     * are dropped on the drop area.\n     */\n    @Output() fileDropReject = new EventEmitter<File[]>();\n\n    /**\n     * Fires when a file or files are dragged into the page.\n     */\n    @Output() pageDragEnter = new EventEmitter<FileDragState>();\n\n    /**\n     * Fires when a file or files is dragged out of the page.\n     */\n    @Output() pageDragLeave = new EventEmitter<void>();\n\n\n    private _draggedFiles: IDraggedFile[] = [];\n    private _isDraggedOver: boolean = false;\n    private _isPageDraggedOver: boolean = false;\n    private _filesDraggedInPage: IDraggedFile[] = [];\n    private _options = defaultOptions;\n    private _subscriptions: Subscription[] = [];\n    private _eventTarget: EventTarget;\n\n\n    constructor(elementRef: ElementRef,\n                @Optional() @Inject(FILE_DROPAREA_DRAG_EVENT_TARGET) dragEventTarget: any,\n                private pageDrag: PageFileDragHandler,\n                private fileDrag: DragStateTrackerFactory,\n                zone: NgZone) {\n\n        this._eventTarget = dragEventTarget || elementRef.nativeElement;\n\n        this.draggedFiles$ = fileDrag.trackElement(this._eventTarget).pipe(\n            map(files => files.filter(this.accepts))\n        );\n\n        this.filesDraggedInPage$ = pageDrag.filesDragged$.pipe(\n            map(files => files.filter(this.accepts))\n        );\n\n        this._subscriptions = [\n            this.draggedFiles$.subscribe(files => {\n                zone.runGuarded(() => {\n                    this._isDraggedOver = files.length > 0;\n                    this._draggedFiles = files;\n                    if (files.length > 0) {\n                        this.fileDragEnter.emit(files);\n                    } else {\n                        this.fileDragLeave.emit(undefined);\n                    }\n                });\n            }),\n            this.filesDraggedInPage$.subscribe(filesInPage => {\n                zone.runGuarded(() => {\n                    this._isPageDraggedOver = filesInPage.length > 0;\n                    this._filesDraggedInPage = filesInPage;\n                    if (filesInPage.length > 0) {\n                        this.pageDragEnter.emit(filesInPage);\n                    } else {\n                        this.pageDragLeave.emit(undefined);\n                    }\n                });\n            })\n        ];\n    }\n\n    ngOnInit(): void {\n        this._eventTarget.addEventListener('dragenter', this.onDragEnterOver);\n        this._eventTarget.addEventListener('dragover', this.onDragEnterOver);\n        this._eventTarget.addEventListener('drop', this.onDrop);\n    }\n\n    ngOnDestroy(): void {\n        this._subscriptions.forEach(s => s.unsubscribe());\n        this._eventTarget.removeEventListener('dragenter', this.onDragEnterOver);\n        this._eventTarget.removeEventListener('dragover', this.onDragEnterOver);\n        this._eventTarget.removeEventListener('drop', this.onDrop);\n        this.pageDrag.destroy();\n    }\n\n    private accepts = (file: {type: string}): boolean => {\n        return !clientReportsMimeTypesOnDrag() || matchesMimeType(file.type, this._options.accept);\n    }\n\n    private onDragEnterOver = (event: DragEvent) => {\n        let transfer = getDataTransfer(event);\n        if (!transferHasFiles(transfer)) {\n            return;\n        }\n\n        if (this._isDraggedOver && !this._options.disabled) {\n            transfer.dropEffect = 'copy';\n        } else {\n            transfer.dropEffect = 'none';\n            transfer.effectAllowed = 'none';\n        }\n        event.preventDefault();\n    }\n\n    private onDrop = (event: DragEvent) => {\n        let transfer = getDataTransfer(event);\n        if (event.defaultPrevented || !transferHasFiles(transfer) || this._options.disabled) {\n            return;\n        }\n\n        event.preventDefault();\n        transfer.dropEffect = 'copy';\n\n        let files = Array.from(transfer.files);\n        let acceptedFiles: File[] = [];\n        let rejectedFiles: File[] = [];\n\n        // Check if the dropped files match the \"accept\" option\n        for (let file of files) {\n            if (matchesMimeType(file.type, this._options.accept)) {\n                acceptedFiles.push(file);\n            } else {\n                rejectedFiles.push(file);\n            }\n        }\n        if (acceptedFiles.length > 0) {\n            this.fileDrop.emit(acceptedFiles);\n        }\n        if (rejectedFiles.length > 0) {\n            this.fileDropReject.emit(rejectedFiles);\n        }\n    }\n}\n"]}