@covalent/core
Version:
Core Teradata UI Platform for layouts, icons, custom components and themes. This should be added as a dependency for any project that wants to use layouts, icons and themes for Angular Material.
145 lines • 18.6 kB
JavaScript
import { Directive, Input, Output, EventEmitter, HostListener, HostBinding, ElementRef, Renderer2, NgZone, } from '@angular/core';
import { coerceBooleanProperty } from '@angular/cdk/coercion';
import * as i0 from "@angular/core";
export class TdFileDropBase {
}
export class TdFileDropDirective {
_renderer;
_element;
_ngZone;
_multiple = false;
_dragenterListener;
_dragleaveListener;
_dragoverListener;
/**
* multiple?: boolean
* Sets whether multiple files can be dropped at once in host element, or just a single file.
* Can also be 'multiple' native attribute.
*/
set multiple(multiple) {
this._multiple = coerceBooleanProperty(multiple);
}
disabled = false;
/**
* fileDrop?: function
* Event emitted when a file or files are dropped in host element after being validated.
* Emits a [FileList | File] object.
*/
fileDrop = new EventEmitter();
/**
* Binds native 'multiple' attribute if [multiple] property is 'true'.
*/
get multipleBinding() {
return this._multiple ? '' : undefined;
}
/**
* Binds native 'disabled' attribute if [disabled] property is 'true'.
*/
get disabledBinding() {
return this.disabled ? '' : undefined;
}
constructor(_renderer, _element, _ngZone) {
this._renderer = _renderer;
this._element = _element;
this._ngZone = _ngZone;
}
ngOnInit() {
this._ngZone.runOutsideAngular(() => {
// Listens to 'dragenter' host event to add animation class 'drop-zone' which can be overriden in host.
// Stops event propagation and default action from browser for 'dragenter' event.
this._dragenterListener = this._renderer.listen(this._element.nativeElement, 'dragenter', (event) => {
if (!this.disabled) {
this._renderer.addClass(this._element.nativeElement, 'drop-zone');
}
this._stopEvent(event);
});
// Listens to 'dragleave' host event to remove animation class 'drop-zone'.
// Stops event propagation and default action from browser for 'dragleave' event.
this._dragleaveListener = this._renderer.listen(this._element.nativeElement, 'dragleave', (event) => {
this._renderer.removeClass(this._element.nativeElement, 'drop-zone');
this._stopEvent(event);
});
// Listens to 'dragover' host event to validate transfer items.
// Checks if 'multiple' attr exists in host to allow multiple file drops.
// Stops event propagation and default action from browser for 'dragover' event.
this._dragoverListener = this._renderer.listen(this._element.nativeElement, 'dragover', (event) => {
const transfer = event.dataTransfer || new DataTransfer();
transfer.dropEffect = this._typeCheck(transfer.types);
if (this.disabled ||
(!this._multiple &&
((transfer.items && transfer.items.length > 1) ||
transfer.mozItemCount > 1))) {
transfer.dropEffect = 'none';
}
else {
transfer.dropEffect = 'copy';
}
this._stopEvent(event);
});
});
}
ngOnDestroy() {
this._dragenterListener?.();
this._dragleaveListener?.();
this._dragoverListener?.();
}
/**
* Listens to 'drop' host event to get validated transfer items.
* Emits the 'fileDrop' event with a [FileList] or [File] depending if 'multiple' attr exists in host.
* Stops event propagation and default action from browser for 'drop' event.
*/
onDrop(event) {
if (!this.disabled) {
const transfer = event.dataTransfer ?? new DataTransfer();
const files = transfer.files;
if (files.length) {
const value = this._multiple
? files.length > 1
? files
: files[0]
: files[0];
this.fileDrop.emit(value);
}
}
this._renderer.removeClass(this._element.nativeElement, 'drop-zone');
this._stopEvent(event);
}
/**
* Validates if the transfer item types are 'Files'.
*/
_typeCheck(types) {
let dropEffect = 'none';
if (types &&
((types.contains && types.contains('Files')) ||
(types.indexOf && types.indexOf('Files') !== -1))) {
dropEffect = 'copy';
}
return dropEffect;
}
_stopEvent(event) {
event.preventDefault();
event.stopPropagation();
}
static ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "17.1.2", ngImport: i0, type: TdFileDropDirective, deps: [{ token: i0.Renderer2 }, { token: i0.ElementRef }, { token: i0.NgZone }], target: i0.ɵɵFactoryTarget.Directive });
static ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "17.1.2", type: TdFileDropDirective, selector: "[tdFileDrop]", inputs: { multiple: "multiple", disabled: "disabled" }, outputs: { fileDrop: "fileDrop" }, host: { listeners: { "drop": "onDrop($event)" }, properties: { "attr.multiple": "this.multipleBinding", "attr.disabled": "this.disabledBinding" } }, ngImport: i0 });
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "17.1.2", ngImport: i0, type: TdFileDropDirective, decorators: [{
type: Directive,
args: [{ selector: '[tdFileDrop]' }]
}], ctorParameters: () => [{ type: i0.Renderer2 }, { type: i0.ElementRef }, { type: i0.NgZone }], propDecorators: { multiple: [{
type: Input
}], disabled: [{
type: Input
}], fileDrop: [{
type: Output
}], multipleBinding: [{
type: HostBinding,
args: ['attr.multiple']
}], disabledBinding: [{
type: HostBinding,
args: ['attr.disabled']
}], onDrop: [{
type: HostListener,
args: ['drop', ['$event']]
}] } });
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= false;\n\n  /**\n   * fileDrop?: function\n   * Event emitted when a file or files are dropped in host element after being validated.\n   * Emits a [FileList | File] object.\n   */\n  @Output() fileDrop: EventEmitter<FileList | File> = new EventEmitter<\n    FileList | File\n  >();\n\n  /**\n   * Binds native 'multiple' attribute if [multiple] property is 'true'.\n   */\n  @HostBinding('attr.multiple')\n  get multipleBinding(): string | undefined {\n    return this._multiple ? '' : undefined;\n  }\n\n  /**\n   * Binds native 'disabled' attribute if [disabled] property is 'true'.\n   */\n  @HostBinding('attr.disabled')\n  get disabledBinding(): string | undefined {\n    return this.disabled ? '' : undefined;\n  }\n\n  constructor(\n    private _renderer: Renderer2,\n    private _element: ElementRef<HTMLElement>,\n    private _ngZone: NgZone\n  ) {}\n\n  ngOnInit(): void {\n    this._ngZone.runOutsideAngular(() => {\n      // Listens to 'dragenter' host event to add animation class 'drop-zone' which can be overriden in host.\n      // Stops event propagation and default action from browser for 'dragenter' event.\n      this._dragenterListener = this._renderer.listen(\n        this._element.nativeElement,\n        'dragenter',\n        (event: Event) => {\n          if (!this.disabled) {\n            this._renderer.addClass(this._element.nativeElement, 'drop-zone');\n          }\n          this._stopEvent(event);\n        }\n      );\n\n      // Listens to 'dragleave' host event to remove animation class 'drop-zone'.\n      // Stops event propagation and default action from browser for 'dragleave' event.\n      this._dragleaveListener = this._renderer.listen(\n        this._element.nativeElement,\n        'dragleave',\n        (event: Event) => {\n          this._renderer.removeClass(this._element.nativeElement, 'drop-zone');\n          this._stopEvent(event);\n        }\n      );\n\n      // Listens to 'dragover' host event to validate transfer items.\n      // Checks if 'multiple' attr exists in host to allow multiple file drops.\n      // Stops event propagation and default action from browser for 'dragover' event.\n      this._dragoverListener = this._renderer.listen(\n        this._element.nativeElement,\n        'dragover',\n        (event: DragEvent) => {\n          const transfer: DataTransfer =\n            event.dataTransfer || new DataTransfer();\n          transfer.dropEffect = this._typeCheck(transfer.types);\n          if (\n            this.disabled ||\n            (!this._multiple &&\n              ((transfer.items && transfer.items.length > 1) ||\n                (<any>transfer).mozItemCount > 1))\n          ) {\n            transfer.dropEffect = 'none';\n          } else {\n            transfer.dropEffect = 'copy';\n          }\n          this._stopEvent(event);\n        }\n      );\n    });\n  }\n\n  ngOnDestroy(): void {\n    this._dragenterListener?.();\n    this._dragleaveListener?.();\n    this._dragoverListener?.();\n  }\n\n  /**\n   * Listens to 'drop' host event to get validated transfer items.\n   * Emits the 'fileDrop' event with a [FileList] or [File] depending if 'multiple' attr exists in host.\n   * Stops event propagation and default action from browser for 'drop' event.\n   */\n  @HostListener('drop', ['$event'])\n  onDrop(event: Event): void {\n    if (!this.disabled) {\n      const transfer: DataTransfer =\n        (<DragEvent>event).dataTransfer ?? new DataTransfer();\n      const files: FileList = transfer.files;\n      if (files.length) {\n        const value: FileList | File = this._multiple\n          ? files.length > 1\n            ? files\n            : files[0]\n          : files[0];\n        this.fileDrop.emit(value);\n      }\n    }\n    this._renderer.removeClass(this._element.nativeElement, 'drop-zone');\n    this._stopEvent(event);\n  }\n\n  /**\n   * Validates if the transfer item types are 'Files'.\n   */\n  private _typeCheck(\n    types: ReadonlyArray<string> | DOMStringList\n  ): 'none' | 'copy' | 'link' | 'move' {\n    let dropEffect: 'none' | 'copy' | 'link' | 'move' = 'none';\n    if (\n      types &&\n      (((<any>types).contains && (<any>types).contains('Files')) ||\n        ((<any>types).indexOf && (<any>types).indexOf('Files') !== -1))\n    ) {\n      dropEffect = 'copy';\n    }\n\n    return dropEffect;\n  }\n\n  private _stopEvent(event: Event): void {\n    event.preventDefault();\n    event.stopPropagation();\n  }\n}\n"]}