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ngx-dropzone-ivy

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A highly configurable dropzone component for Angular.

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import { Component, EventEmitter, Output, Input, ViewChild, ContentChildren, QueryList, HostBinding, HostListener, Self, ElementRef } from '@angular/core'; import { NgxDropzoneService } from '../ngx-dropzone.service'; import { coerceBooleanProperty, coerceNumberProperty } from '../helpers'; import { NgxDropzonePreviewComponent } from '../ngx-dropzone-preview/ngx-dropzone-preview.component'; import * as i0 from "@angular/core"; import * as i1 from "../ngx-dropzone.service"; import * as i2 from "@angular/common"; export class NgxDropzoneComponent { constructor(service) { this.service = service; /** Emitted when any files were added or rejected. */ this.change = new EventEmitter(); /** Set the accepted file types. Defaults to '*'. */ this.accept = '*'; this._disabled = false; this._multiple = true; this._maxFileSize = undefined; this._expandable = false; this._disableClick = false; this._processDirectoryDrop = false; this._isHovered = false; } get _hasPreviews() { return !!this._previewChildren.length; } /** Disable any user interaction with the component. */ get disabled() { return this._disabled; } set disabled(value) { this._disabled = coerceBooleanProperty(value); if (this._isHovered) { this._isHovered = false; } } /** Allow the selection of multiple files. */ get multiple() { return this._multiple; } set multiple(value) { this._multiple = coerceBooleanProperty(value); } /** Set the maximum size a single file may have. */ get maxFileSize() { return this._maxFileSize; } set maxFileSize(value) { this._maxFileSize = coerceNumberProperty(value); } /** Allow the dropzone container to expand vertically. */ get expandable() { return this._expandable; } set expandable(value) { this._expandable = coerceBooleanProperty(value); } /** Open the file selector on click. */ get disableClick() { return this._disableClick; } set disableClick(value) { this._disableClick = coerceBooleanProperty(value); } /** Allow dropping directories. */ get processDirectoryDrop() { return this._processDirectoryDrop; } set processDirectoryDrop(value) { this._processDirectoryDrop = coerceBooleanProperty(value); } /** Show the native OS file explorer to select files. */ _onClick() { if (!this.disableClick) { this.showFileSelector(); } } _onDragOver(event) { if (this.disabled) { return; } this.preventDefault(event); this._isHovered = true; } _onDragLeave() { this._isHovered = false; } _onDrop(event) { if (this.disabled) { return; } this.preventDefault(event); this._isHovered = false; // if processDirectoryDrop is not enabled or webkitGetAsEntry is not supported we handle the drop as usual if (!this.processDirectoryDrop || !DataTransferItem.prototype.webkitGetAsEntry) { this.handleFileDrop(event.dataTransfer.files); // if processDirectoryDrop is enabled and webkitGetAsEntry is supported we can extract files from a dropped directory } else { const droppedItems = event.dataTransfer.items; if (droppedItems.length > 0) { const droppedFiles = []; const droppedDirectories = []; // seperate dropped files from dropped directories for easier handling for (let i = 0; i < droppedItems.length; i++) { const entry = droppedItems[i].webkitGetAsEntry(); if (entry.isFile) { droppedFiles.push(event.dataTransfer.files[i]); } else if (entry.isDirectory) { droppedDirectories.push(entry); } } // create a DataTransfer const droppedFilesList = new DataTransfer(); droppedFiles.forEach((droppedFile) => { droppedFilesList.items.add(droppedFile); }); // if no directory is dropped we are done and can call handleFileDrop if (!droppedDirectories.length && droppedFilesList.items.length) { this.handleFileDrop(droppedFilesList.files); } // if directories are dropped we extract the files from these directories one-by-one and add it to droppedFilesList if (droppedDirectories.length) { const extractFilesFromDirectoryCalls = []; for (const droppedDirectory of droppedDirectories) { extractFilesFromDirectoryCalls.push(this.extractFilesFromDirectory(droppedDirectory)); } // wait for all directories to be proccessed to add the extracted files afterwards Promise.all(extractFilesFromDirectoryCalls).then((allExtractedFiles) => { allExtractedFiles.reduce((a, b) => [...a, ...b]).forEach((extractedFile) => { droppedFilesList.items.add(extractedFile); }); this.handleFileDrop(droppedFilesList.files); }); } } } } extractFilesFromDirectory(directory) { async function getFileFromFileEntry(fileEntry) { try { return await new Promise((resolve, reject) => fileEntry.file(resolve, reject)); } catch (err) { console.log('Error converting a fileEntry to a File: ', err); } } return new Promise((resolve, reject) => { const files = []; const dirReader = directory.createReader(); // we need this to be a recursion because of this issue: https://bugs.chromium.org/p/chromium/issues/detail?id=514087 const readEntries = () => { dirReader.readEntries(async (dirItems) => { if (!dirItems.length) { resolve(files); } else { const fileEntries = dirItems.filter((dirItem) => dirItem.isFile); for (const fileEntry of fileEntries) { const file = await getFileFromFileEntry(fileEntry); files.push(file); } readEntries(); } }); }; readEntries(); }); } showFileSelector() { if (!this.disabled) { this._fileInput.nativeElement.click(); } } _onFilesSelected(event) { const files = event.target.files; this.handleFileDrop(files); // Reset the native file input element to allow selecting the same file again this._fileInput.nativeElement.value = ''; // fix(#32): Prevent the default event behaviour which caused the change event to emit twice. this.preventDefault(event); } handleFileDrop(files) { const result = this.service.parseFileList(files, this.accept, this.maxFileSize, this.multiple); this.change.next({ addedFiles: result.addedFiles, rejectedFiles: result.rejectedFiles, source: this }); } preventDefault(event) { event.preventDefault(); event.stopPropagation(); } static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.2.12", ngImport: i0, type: NgxDropzoneComponent, deps: [{ token: i1.NgxDropzoneService, self: true }], target: i0.ɵɵFactoryTarget.Component }); } static { this.ɵcmp = i0.ɵɵngDeclareComponent({ minVersion: "14.0.0", version: "16.2.12", type: NgxDropzoneComponent, selector: "ngx-dropzone, [ngx-dropzone]", inputs: { accept: "accept", disabled: "disabled", multiple: "multiple", maxFileSize: "maxFileSize", expandable: "expandable", disableClick: "disableClick", processDirectoryDrop: "processDirectoryDrop", id: "id", ariaLabel: ["aria-label", "ariaLabel"], ariaLabelledby: ["aria-labelledby", "ariaLabelledby"], ariaDescribedBy: ["aria-describedby", "ariaDescribedBy"] }, outputs: { change: "change" }, host: { listeners: { "click": "_onClick()", "dragover": "_onDragOver($event)", "dragleave": "_onDragLeave()", "drop": "_onDrop($event)" }, properties: { "class.ngx-dz-disabled": "this.disabled", "class.expandable": "this.expandable", "class.unclickable": "this.disableClick", "class.ngx-dz-hovered": "this._isHovered" } }, providers: [NgxDropzoneService], queries: [{ propertyName: "_previewChildren", predicate: NgxDropzonePreviewComponent, descendants: true }], viewQueries: [{ propertyName: "_fileInput", first: true, predicate: ["fileInput"], descendants: true, static: true }], ngImport: i0, template: "<input #fileInput type=\"file\" [id]=\"id\" [multiple]=\"multiple\" [accept]=\"accept\" [disabled]=\"disabled\"\r\n (change)=\"_onFilesSelected($event)\" [attr.aria-label]=\"ariaLabel\" [attr.aria-labelledby]=\"ariaLabelledby\"\r\n [attr.aria-describedby]=\"ariaDescribedBy\">\r\n<ng-content select=\"ngx-dropzone-label\" *ngIf=\"!_hasPreviews\"></ng-content>\r\n<ng-content select=\"ngx-dropzone-preview\"></ng-content>\r\n<ng-content></ng-content>\r\n", styles: [":host{display:flex;align-items:center;height:180px;background:#fff;cursor:pointer;color:#717386;border:2px dashed #717386;border-radius:5px;font-size:16px;overflow-x:auto}:host.ngx-dz-hovered{border-style:solid}:host.ngx-dz-disabled{opacity:.5;cursor:no-drop;pointer-events:none}:host.expandable{overflow:hidden;height:unset;min-height:180px;flex-wrap:wrap}:host.unclickable{cursor:default}:host ::ng-deep ngx-dropzone-label{text-align:center;z-index:10;margin:10px auto}:host input{width:.1px;height:.1px;opacity:0;overflow:hidden;position:absolute;z-index:-1}:host input:focus+::ng-deep ngx-dropzone-label{outline:1px dotted #000;outline:-webkit-focus-ring-color auto 5px}\n"], dependencies: [{ kind: "directive", type: i2.NgIf, selector: "[ngIf]", inputs: ["ngIf", "ngIfThen", "ngIfElse"] }] }); } } i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.2.12", ngImport: i0, type: NgxDropzoneComponent, decorators: [{ type: Component, args: [{ selector: 'ngx-dropzone, [ngx-dropzone]', providers: [NgxDropzoneService], template: "<input #fileInput type=\"file\" [id]=\"id\" [multiple]=\"multiple\" [accept]=\"accept\" [disabled]=\"disabled\"\r\n (change)=\"_onFilesSelected($event)\" [attr.aria-label]=\"ariaLabel\" [attr.aria-labelledby]=\"ariaLabelledby\"\r\n [attr.aria-describedby]=\"ariaDescribedBy\">\r\n<ng-content select=\"ngx-dropzone-label\" *ngIf=\"!_hasPreviews\"></ng-content>\r\n<ng-content select=\"ngx-dropzone-preview\"></ng-content>\r\n<ng-content></ng-content>\r\n", styles: [":host{display:flex;align-items:center;height:180px;background:#fff;cursor:pointer;color:#717386;border:2px dashed #717386;border-radius:5px;font-size:16px;overflow-x:auto}:host.ngx-dz-hovered{border-style:solid}:host.ngx-dz-disabled{opacity:.5;cursor:no-drop;pointer-events:none}:host.expandable{overflow:hidden;height:unset;min-height:180px;flex-wrap:wrap}:host.unclickable{cursor:default}:host ::ng-deep ngx-dropzone-label{text-align:center;z-index:10;margin:10px auto}:host input{width:.1px;height:.1px;opacity:0;overflow:hidden;position:absolute;z-index:-1}:host input:focus+::ng-deep ngx-dropzone-label{outline:1px dotted #000;outline:-webkit-focus-ring-color auto 5px}\n"] }] }], ctorParameters: function () { return [{ type: i1.NgxDropzoneService, decorators: [{ type: Self }] }]; }, propDecorators: { _previewChildren: [{ type: ContentChildren, args: [NgxDropzonePreviewComponent, { descendants: true }] }], _fileInput: [{ type: ViewChild, args: ['fileInput', { static: true }] }], change: [{ type: Output }], accept: [{ type: Input }], disabled: [{ type: Input }, { type: HostBinding, args: ['class.ngx-dz-disabled'] }], multiple: [{ type: Input }], maxFileSize: [{ type: Input }], expandable: [{ type: Input }, { type: HostBinding, args: ['class.expandable'] }], disableClick: [{ type: Input }, { type: HostBinding, args: ['class.unclickable'] }], processDirectoryDrop: [{ type: Input }], id: [{ type: Input }], ariaLabel: [{ type: Input, args: ['aria-label'] }], ariaLabelledby: [{ type: Input, args: ['aria-labelledby'] }], ariaDescribedBy: [{ type: Input, args: ['aria-describedby'] }], _isHovered: [{ type: HostBinding, args: ['class.ngx-dz-hovered'] }], _onClick: [{ type: HostListener, args: ['click'] }], _onDragOver: [{ type: HostListener, args: ['dragover', ['$event']] }], _onDragLeave: [{ type: HostListener, args: ['dragleave'] }], _onDrop: [{ type: HostListener, args: ['drop', ['$event']] }] } }); //# 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{ Component, EventEmitter, Output, Input, ViewChild, ContentChildren, QueryList, HostBinding, HostListener, Self, ElementRef } from '@angular/core';\r\nimport {NgxDropzoneService, RejectedFile} from '../ngx-dropzone.service';\r\nimport { coerceBooleanProperty, coerceNumberProperty } from '../helpers';\r\nimport { NgxDropzonePreviewComponent } from '../ngx-dropzone-preview/ngx-dropzone-preview.component';\r\n\r\nexport interface NgxDropzoneChangeEvent {\r\n  source: NgxDropzoneComponent;\r\n  addedFiles: File[];\r\n  rejectedFiles: RejectedFile[];\r\n}\r\n\r\n@Component({\r\n  selector: 'ngx-dropzone, [ngx-dropzone]',\r\n  templateUrl: './ngx-dropzone.component.html',\r\n  styleUrls: ['./ngx-dropzone.component.scss'],\r\n  providers: [NgxDropzoneService]\r\n})\r\nexport class NgxDropzoneComponent {\r\n\r\n  constructor(\r\n    @Self() private service: NgxDropzoneService\r\n  ) {}\r\n\r\n  /** A list of the content-projected preview children. */\r\n  @ContentChildren(NgxDropzonePreviewComponent, { descendants: true })\r\n  _previewChildren: QueryList<NgxDropzonePreviewComponent>;\r\n\r\n  get _hasPreviews(): boolean {\r\n    return !!this._previewChildren.length;\r\n  }\r\n\r\n  /** A template reference to the native file input element. */\r\n  @ViewChild('fileInput', { static: true }) _fileInput: ElementRef;\r\n\r\n  /** Emitted when any files were added or rejected. */\r\n  @Output() readonly change = new EventEmitter<NgxDropzoneChangeEvent>();\r\n\r\n  /** Set the accepted file types. Defaults to '*'. */\r\n  @Input() accept = '*';\r\n\r\n  /** Disable any user interaction with the component. */\r\n  @Input()\r\n  @HostBinding('class.ngx-dz-disabled')\r\n  get disabled(): boolean {\r\n    return this._disabled;\r\n  }\r\n  set disabled(value: boolean) {\r\n    this._disabled = coerceBooleanProperty(value);\r\n\r\n    if (this._isHovered) {\r\n      this._isHovered = false;\r\n    }\r\n  }\r\n  private _disabled = false;\r\n\r\n  /** Allow the selection of multiple files. */\r\n  @Input()\r\n  get multiple(): boolean {\r\n    return this._multiple;\r\n  }\r\n  set multiple(value: boolean) {\r\n    this._multiple = coerceBooleanProperty(value);\r\n  }\r\n  private _multiple = true;\r\n\r\n  /** Set the maximum size a single file may have. */\r\n  @Input()\r\n  get maxFileSize(): number {\r\n    return this._maxFileSize;\r\n  }\r\n  set maxFileSize(value: number) {\r\n    this._maxFileSize = coerceNumberProperty(value);\r\n  }\r\n  private _maxFileSize: number = undefined;\r\n\r\n  /** Allow the dropzone container to expand vertically. */\r\n  @Input()\r\n  @HostBinding('class.expandable')\r\n  get expandable(): boolean {\r\n    return this._expandable;\r\n  }\r\n  set expandable(value: boolean) {\r\n    this._expandable = coerceBooleanProperty(value);\r\n  }\r\n  private _expandable: boolean = false;\r\n\r\n  /** Open the file selector on click. */\r\n  @Input()\r\n  @HostBinding('class.unclickable')\r\n  get disableClick(): boolean {\r\n    return this._disableClick;\r\n  }\r\n  set disableClick(value: boolean) {\r\n    this._disableClick = coerceBooleanProperty(value);\r\n  }\r\n  private _disableClick = false;\r\n\r\n  /** Allow dropping directories. */\r\n  @Input()\r\n  get processDirectoryDrop(): boolean {\r\n    return this._processDirectoryDrop;\r\n  }\r\n  set processDirectoryDrop(value: boolean) {\r\n    this._processDirectoryDrop = coerceBooleanProperty(value);\r\n  }\r\n  private _processDirectoryDrop = false;\r\n\r\n  /** Expose the id, aria-label, aria-labelledby and aria-describedby of the native file input for proper accessibility. */\r\n  @Input() id: string;\r\n  @Input('aria-label') ariaLabel: string;\r\n  @Input('aria-labelledby') ariaLabelledby: string;\r\n  @Input('aria-describedby') ariaDescribedBy: string;\r\n\r\n  @HostBinding('class.ngx-dz-hovered')\r\n  _isHovered = false;\r\n\r\n  /** Show the native OS file explorer to select files. */\r\n  @HostListener('click')\r\n  _onClick() {\r\n    if (!this.disableClick) {\r\n      this.showFileSelector();\r\n    }\r\n  }\r\n\r\n  @HostListener('dragover', ['$event'])\r\n  _onDragOver(event) {\r\n    if (this.disabled) {\r\n      return;\r\n    }\r\n\r\n    this.preventDefault(event);\r\n    this._isHovered = true;\r\n  }\r\n\r\n  @HostListener('dragleave')\r\n  _onDragLeave() {\r\n    this._isHovered = false;\r\n  }\r\n\r\n  @HostListener('drop', ['$event'])\r\n  _onDrop(event) {\r\n    if (this.disabled) {\r\n      return;\r\n    }\r\n\r\n    this.preventDefault(event);\r\n    this._isHovered = false;\r\n\r\n    // if processDirectoryDrop is not enabled or webkitGetAsEntry is not supported we handle the drop as usual\r\n    if (!this.processDirectoryDrop || !DataTransferItem.prototype.webkitGetAsEntry) {\r\n      this.handleFileDrop(event.dataTransfer.files);\r\n\r\n    // if processDirectoryDrop is enabled and webkitGetAsEntry is supported we can extract files from a dropped directory\r\n    } else {\r\n      const droppedItems: DataTransferItem[] = event.dataTransfer.items;\r\n\r\n      if (droppedItems.length > 0) {\r\n        const droppedFiles: File[] = [];\r\n        const droppedDirectories = [];\r\n\r\n        // seperate dropped files from dropped directories for easier handling\r\n        for (let i = 0; i < droppedItems.length; i++) {\r\n          const entry = droppedItems[i].webkitGetAsEntry();\r\n          if (entry.isFile) {\r\n            droppedFiles.push(event.dataTransfer.files[i]);\r\n          } else if (entry.isDirectory) {\r\n            droppedDirectories.push(entry);\r\n          }\r\n        }\r\n\r\n        // create a DataTransfer\r\n        const droppedFilesList = new DataTransfer();\r\n        droppedFiles.forEach((droppedFile) => {\r\n          droppedFilesList.items.add(droppedFile);\r\n        });\r\n\r\n        // if no directory is dropped we are done and can call handleFileDrop\r\n        if (!droppedDirectories.length && droppedFilesList.items.length) {\r\n          this.handleFileDrop(droppedFilesList.files);\r\n        }\r\n\r\n        // if directories are dropped we extract the files from these directories one-by-one and add it to droppedFilesList\r\n        if (droppedDirectories.length) {\r\n          const extractFilesFromDirectoryCalls = [];\r\n\r\n          for (const droppedDirectory of droppedDirectories) {\r\n            extractFilesFromDirectoryCalls.push(this.extractFilesFromDirectory(droppedDirectory));\r\n          }\r\n\r\n          // wait for all directories to be proccessed to add the extracted files afterwards\r\n          Promise.all(extractFilesFromDirectoryCalls).then((allExtractedFiles: any[]) => {\r\n            allExtractedFiles.reduce((a, b) => [...a, ...b]).forEach((extractedFile: File) => {\r\n              droppedFilesList.items.add(extractedFile);\r\n            });\r\n\r\n            this.handleFileDrop(droppedFilesList.files);\r\n          });\r\n        }\r\n      }\r\n    }\r\n  }\r\n\r\n  private extractFilesFromDirectory(directory) {\r\n    async function getFileFromFileEntry(fileEntry) {\r\n      try {\r\n        return await new Promise((resolve, reject) => fileEntry.file(resolve, reject));\r\n      } catch (err) {\r\n        console.log('Error converting a fileEntry to a File: ', err);\r\n      }\r\n    }\r\n\r\n    return new Promise((resolve, reject) => {\r\n      const files: File[] = [];\r\n\r\n      const dirReader = directory.createReader();\r\n\r\n      // we need this to be a recursion because of this issue: https://bugs.chromium.org/p/chromium/issues/detail?id=514087\r\n      const readEntries = () => {\r\n        dirReader.readEntries(async(dirItems) => {\r\n          if (!dirItems.length) {\r\n            resolve(files);\r\n          } else {\r\n            const fileEntries = dirItems.filter((dirItem) => dirItem.isFile);\r\n\r\n            for (const fileEntry of fileEntries) {\r\n              const file: any = await getFileFromFileEntry(fileEntry);\r\n              files.push(file);\r\n            }\r\n\r\n            readEntries();\r\n          }\r\n        });\r\n      };\r\n      readEntries();\r\n    });\r\n  }\r\n\r\n  showFileSelector() {\r\n    if (!this.disabled) {\r\n      (this._fileInput.nativeElement as HTMLInputElement).click();\r\n    }\r\n  }\r\n\r\n  _onFilesSelected(event) {\r\n    const files: FileList = event.target.files;\r\n    this.handleFileDrop(files);\r\n\r\n    // Reset the native file input element to allow selecting the same file again\r\n    this._fileInput.nativeElement.value = '';\r\n\r\n    // fix(#32): Prevent the default event behaviour which caused the change event to emit twice.\r\n    this.preventDefault(event);\r\n  }\r\n\r\n  private handleFileDrop(files: FileList) {\r\n    const result = this.service.parseFileList(files, this.accept, this.maxFileSize, this.multiple);\r\n\r\n    this.change.next({\r\n      addedFiles: result.addedFiles,\r\n      rejectedFiles: result.rejectedFiles,\r\n      source: this\r\n    });\r\n  }\r\n\r\n  private preventDefault(event: DragEvent) {\r\n    event.preventDefault();\r\n    event.stopPropagation();\r\n  }\r\n}\r\n","<input #fileInput type=\"file\" [id]=\"id\" [multiple]=\"multiple\" [accept]=\"accept\" [disabled]=\"disabled\"\r\n  (change)=\"_onFilesSelected($event)\" [attr.aria-label]=\"ariaLabel\" [attr.aria-labelledby]=\"ariaLabelledby\"\r\n  [attr.aria-describedby]=\"ariaDescribedBy\">\r\n<ng-content select=\"ngx-dropzone-label\" *ngIf=\"!_hasPreviews\"></ng-content>\r\n<ng-content select=\"ngx-dropzone-preview\"></ng-content>\r\n<ng-content></ng-content>\r\n"]}