Icard/angular-clarity-master(work.../node_modules/ngx-drag-drop/esm2022/lib/dnd-dropzone.directive.mjs

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2024-07-16 14:55:36 +00:00
import { ContentChild, Directive, EventEmitter, HostListener, Input, Output, } from '@angular/core';
import { getDndType, getDropEffect, isExternalDrag, setDropEffect, } from './dnd-state';
import { getDirectChildElement, getDropData, shouldPositionPlaceholderBeforeElement, } from './dnd-utils';
import * as i0 from "@angular/core";
class DndPlaceholderRefDirective {
elementRef;
constructor(elementRef) {
this.elementRef = elementRef;
}
ngOnInit() {
// placeholder has to be "invisible" to the cursor, or it would interfere with the dragover detection for the same dropzone
this.elementRef.nativeElement.style.pointerEvents = 'none';
}
static ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.0.1", ngImport: i0, type: DndPlaceholderRefDirective, deps: [{ token: i0.ElementRef }], target: i0.ɵɵFactoryTarget.Directive });
static ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "16.0.1", type: DndPlaceholderRefDirective, isStandalone: true, selector: "[dndPlaceholderRef]", ngImport: i0 });
}
export { DndPlaceholderRefDirective };
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.0.1", ngImport: i0, type: DndPlaceholderRefDirective, decorators: [{
type: Directive,
args: [{ selector: '[dndPlaceholderRef]', standalone: true }]
}], ctorParameters: function () { return [{ type: i0.ElementRef }]; } });
class DndDropzoneDirective {
ngZone;
elementRef;
renderer;
dndDropzone = '';
dndEffectAllowed = 'uninitialized';
dndAllowExternal = false;
dndHorizontal = false;
dndDragoverClass = 'dndDragover';
dndDropzoneDisabledClass = 'dndDropzoneDisabled';
dndDragover = new EventEmitter();
dndDrop = new EventEmitter();
dndPlaceholderRef;
placeholder = null;
disabled = false;
constructor(ngZone, elementRef, renderer) {
this.ngZone = ngZone;
this.elementRef = elementRef;
this.renderer = renderer;
}
set dndDisableIf(value) {
this.disabled = value;
if (this.disabled) {
this.renderer.addClass(this.elementRef.nativeElement, this.dndDropzoneDisabledClass);
}
else {
this.renderer.removeClass(this.elementRef.nativeElement, this.dndDropzoneDisabledClass);
}
}
set dndDisableDropIf(value) {
this.dndDisableIf = value;
}
ngAfterViewInit() {
this.placeholder = this.tryGetPlaceholder();
this.removePlaceholderFromDOM();
this.ngZone.runOutsideAngular(() => {
this.elementRef.nativeElement.addEventListener('dragenter', this.dragEnterEventHandler);
this.elementRef.nativeElement.addEventListener('dragover', this.dragOverEventHandler);
this.elementRef.nativeElement.addEventListener('dragleave', this.dragLeaveEventHandler);
});
}
ngOnDestroy() {
this.elementRef.nativeElement.removeEventListener('dragenter', this.dragEnterEventHandler);
this.elementRef.nativeElement.removeEventListener('dragover', this.dragOverEventHandler);
this.elementRef.nativeElement.removeEventListener('dragleave', this.dragLeaveEventHandler);
}
onDragEnter(event) {
// check if another dropzone is activated
if (event._dndDropzoneActive === true) {
this.cleanupDragoverState();
return;
}
// set as active if the target element is inside this dropzone
if (event._dndDropzoneActive == null) {
const newTarget = document.elementFromPoint(event.clientX, event.clientY);
if (this.elementRef.nativeElement.contains(newTarget)) {
event._dndDropzoneActive = true;
}
}
// check if this drag event is allowed to drop on this dropzone
const type = getDndType(event);
if (!this.isDropAllowed(type)) {
return;
}
// allow the dragenter
event.preventDefault();
}
onDragOver(event) {
// With nested dropzones, we want to ignore this event if a child dropzone
// has already handled a dragover. Historically, event.stopPropagation() was
// used to prevent this bubbling, but that prevents any dragovers outside the
// ngx-drag-drop component, and stops other use cases such as scrolling on drag.
// Instead, we can check if the event was already prevented by a child and bail early.
if (event.defaultPrevented) {
return;
}
// check if this drag event is allowed to drop on this dropzone
const type = getDndType(event);
if (!this.isDropAllowed(type)) {
return;
}
this.checkAndUpdatePlaceholderPosition(event);
const dropEffect = getDropEffect(event, this.dndEffectAllowed);
if (dropEffect === 'none') {
this.cleanupDragoverState();
return;
}
// allow the dragover
event.preventDefault();
// set the drop effect
setDropEffect(event, dropEffect);
this.dndDragover.emit(event);
this.renderer.addClass(this.elementRef.nativeElement, this.dndDragoverClass);
}
onDrop(event) {
try {
// check if this drag event is allowed to drop on this dropzone
const type = getDndType(event);
if (!this.isDropAllowed(type)) {
return;
}
const data = getDropData(event, isExternalDrag());
if (!this.isDropAllowed(data.type)) {
return;
}
// signal custom drop handling
event.preventDefault();
const dropEffect = getDropEffect(event);
setDropEffect(event, dropEffect);
if (dropEffect === 'none') {
return;
}
const dropIndex = this.getPlaceholderIndex();
// if for whatever reason the placeholder is not present in the DOM but it should be there
// we don't allow/emit the drop event since it breaks the contract
// seems to only happen if drag and drop is executed faster than the DOM updates
if (dropIndex === -1) {
return;
}
this.dndDrop.emit({
event: event,
dropEffect: dropEffect,
isExternal: isExternalDrag(),
data: data.data,
index: dropIndex,
type: type,
});
event.stopPropagation();
}
finally {
this.cleanupDragoverState();
}
}
onDragLeave(event) {
event.preventDefault();
event.stopPropagation();
// check if still inside this dropzone and not yet handled by another dropzone
if (event._dndDropzoneActive == null) {
if (this.elementRef.nativeElement.contains(event.relatedTarget)) {
event._dndDropzoneActive = true;
return;
}
}
this.cleanupDragoverState();
// cleanup drop effect when leaving dropzone
setDropEffect(event, 'none');
}
dragEnterEventHandler = (event) => this.onDragEnter(event);
dragOverEventHandler = (event) => this.onDragOver(event);
dragLeaveEventHandler = (event) => this.onDragLeave(event);
isDropAllowed(type) {
// dropzone is disabled -> deny it
if (this.disabled) {
return false;
}
// if drag did not start from our directive
// and external drag sources are not allowed -> deny it
if (isExternalDrag() && !this.dndAllowExternal) {
return false;
}
// no filtering by types -> allow it
if (!this.dndDropzone) {
return true;
}
// no type set -> allow it
if (!type) {
return true;
}
if (!Array.isArray(this.dndDropzone)) {
throw new Error('dndDropzone: bound value to [dndDropzone] must be an array!');
}
// if dropzone contains type -> allow it
return this.dndDropzone.indexOf(type) !== -1;
}
tryGetPlaceholder() {
if (typeof this.dndPlaceholderRef !== 'undefined') {
return this.dndPlaceholderRef.elementRef.nativeElement;
}
// TODO nasty workaround needed because if ng-container / template is used @ContentChild() or DI will fail because
// of wrong context see angular bug https://github.com/angular/angular/issues/13517
return this.elementRef.nativeElement.querySelector('[dndPlaceholderRef]');
}
removePlaceholderFromDOM() {
if (this.placeholder !== null && this.placeholder.parentNode !== null) {
this.placeholder.parentNode.removeChild(this.placeholder);
}
}
checkAndUpdatePlaceholderPosition(event) {
if (this.placeholder === null) {
return;
}
// make sure the placeholder is in the DOM
if (this.placeholder.parentNode !== this.elementRef.nativeElement) {
this.renderer.appendChild(this.elementRef.nativeElement, this.placeholder);
}
// update the position if the event originates from a child element of the dropzone
const directChild = getDirectChildElement(this.elementRef.nativeElement, event.target);
// early exit if no direct child or direct child is placeholder
if (directChild === null || directChild === this.placeholder) {
return;
}
const positionPlaceholderBeforeDirectChild = shouldPositionPlaceholderBeforeElement(event, directChild, this.dndHorizontal);
if (positionPlaceholderBeforeDirectChild) {
// do insert before only if necessary
if (directChild.previousSibling !== this.placeholder) {
this.renderer.insertBefore(this.elementRef.nativeElement, this.placeholder, directChild);
}
}
else {
// do insert after only if necessary
if (directChild.nextSibling !== this.placeholder) {
this.renderer.insertBefore(this.elementRef.nativeElement, this.placeholder, directChild.nextSibling);
}
}
}
getPlaceholderIndex() {
if (this.placeholder === null) {
return undefined;
}
const element = this.elementRef.nativeElement;
return Array.prototype.indexOf.call(element.children, this.placeholder);
}
cleanupDragoverState() {
this.renderer.removeClass(this.elementRef.nativeElement, this.dndDragoverClass);
this.removePlaceholderFromDOM();
}
static ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.0.1", ngImport: i0, type: DndDropzoneDirective, deps: [{ token: i0.NgZone }, { token: i0.ElementRef }, { token: i0.Renderer2 }], target: i0.ɵɵFactoryTarget.Directive });
static ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "16.0.1", type: DndDropzoneDirective, isStandalone: true, selector: "[dndDropzone]", inputs: { dndDropzone: "dndDropzone", dndEffectAllowed: "dndEffectAllowed", dndAllowExternal: "dndAllowExternal", dndHorizontal: "dndHorizontal", dndDragoverClass: "dndDragoverClass", dndDropzoneDisabledClass: "dndDropzoneDisabledClass", dndDisableIf: "dndDisableIf", dndDisableDropIf: "dndDisableDropIf" }, outputs: { dndDragover: "dndDragover", dndDrop: "dndDrop" }, host: { listeners: { "drop": "onDrop($event)" } }, queries: [{ propertyName: "dndPlaceholderRef", first: true, predicate: DndPlaceholderRefDirective, descendants: true }], ngImport: i0 });
}
export { DndDropzoneDirective };
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.0.1", ngImport: i0, type: DndDropzoneDirective, decorators: [{
type: Directive,
args: [{ selector: '[dndDropzone]', standalone: true }]
}], ctorParameters: function () { return [{ type: i0.NgZone }, { type: i0.ElementRef }, { type: i0.Renderer2 }]; }, propDecorators: { dndDropzone: [{
type: Input
}], dndEffectAllowed: [{
type: Input
}], dndAllowExternal: [{
type: Input
}], dndHorizontal: [{
type: Input
}], dndDragoverClass: [{
type: Input
}], dndDropzoneDisabledClass: [{
type: Input
}], dndDragover: [{
type: Output
}], dndDrop: [{
type: Output
}], dndPlaceholderRef: [{
type: ContentChild,
args: [DndPlaceholderRefDirective]
}], dndDisableIf: [{
type: Input
}], dndDisableDropIf: [{
type: Input
}], onDrop: [{
type: HostListener,
args: ['drop', ['$event']]
}] } });
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