ngx-bootstrap
Version:
Angular Bootstrap
217 lines (216 loc) • 7.44 kB
JavaScript
import { Component, Input, Output, EventEmitter, forwardRef, TemplateRef } from '@angular/core';
import { NG_VALUE_ACCESSOR } from '@angular/forms';
import { DraggableItemService } from './draggable-item.service';
export class SortableComponent {
constructor(transfer) {
/** class name for items wrapper */
this.wrapperClass = '';
/** style object for items wrapper */
this.wrapperStyle = {};
/** class name for item */
this.itemClass = '';
/** style object for item */
this.itemStyle = {};
/** class name for active item */
this.itemActiveClass = '';
/** style object for active item */
this.itemActiveStyle = {};
/** class name for placeholder */
this.placeholderClass = '';
/** style object for placeholder */
this.placeholderStyle = {};
/** placeholder item which will be shown if collection is empty */
this.placeholderItem = '';
/** fired on array change (reordering, insert, remove), same as <code>ngModelChange</code>.
* Returns new items collection as a payload.
*/
this.onChange = new EventEmitter();
this.showPlaceholder = false;
this.activeItem = -1;
// eslint-disable-next-line @typescript-eslint/no-explicit-any
this.onTouched = Function.prototype;
// eslint-disable-next-line @typescript-eslint/no-explicit-any
this.onChanged = Function.prototype;
this._items = [];
this.transfer = transfer;
this.currentZoneIndex = SortableComponent.globalZoneIndex++;
this.transfer
.onCaptureItem()
.subscribe((item) => this.onDrop(item));
}
get items() {
return this._items;
}
set items(value) {
this._items = value;
const out = this.items.map((x) => x.initData);
this.onChanged(out);
this.onChange.emit(out);
}
onItemDragstart(event, item, i) {
this.initDragstartEvent(event);
this.onTouched();
this.transfer.dragStart({
event,
item,
i,
initialIndex: i,
lastZoneIndex: this.currentZoneIndex,
overZoneIndex: this.currentZoneIndex
});
}
onItemDragover(event, i) {
if (!this.transfer.getItem()) {
return;
}
event.preventDefault();
const dragItem = this.transfer.captureItem(this.currentZoneIndex, this.items.length);
// eslint-disable-next-line @typescript-eslint/no-explicit-any
let newArray = [];
if (!dragItem) {
return;
}
if (!this.items.length) {
newArray = [dragItem.item];
}
else if (dragItem.i > i) {
newArray = [
...this.items.slice(0, i),
dragItem.item,
...this.items.slice(i, dragItem.i),
...this.items.slice(dragItem.i + 1)
];
}
else {
// this.draggedItem.i < i
newArray = [
...this.items.slice(0, dragItem.i),
...this.items.slice(dragItem.i + 1, i + 1),
dragItem.item,
...this.items.slice(i + 1)
];
}
this.items = newArray;
dragItem.i = i;
this.activeItem = i;
this.updatePlaceholderState();
}
cancelEvent(event) {
if (!this.transfer.getItem() || !event) {
return;
}
event.preventDefault();
}
onDrop(item) {
if (item &&
item.overZoneIndex !== this.currentZoneIndex &&
item.lastZoneIndex === this.currentZoneIndex) {
this.items = this.items.filter((x, i) => i !== item.i);
this.updatePlaceholderState();
}
this.resetActiveItem();
}
resetActiveItem(event) {
this.cancelEvent(event);
this.activeItem = -1;
}
registerOnChange(callback) {
this.onChanged = callback;
}
registerOnTouched(callback) {
this.onTouched = callback;
}
// eslint-disable-next-line @typescript-eslint/no-explicit-any
writeValue(value) {
if (value) {
// eslint-disable-next-line @typescript-eslint/no-explicit-any
this.items = value.map((x, i) => ({
id: i,
initData: x,
value: this.fieldName ? x[this.fieldName] : x
}));
}
else {
this.items = [];
}
this.updatePlaceholderState();
}
updatePlaceholderState() {
this.showPlaceholder = !this._items.length;
}
getItemStyle(isActive) {
return isActive
? Object.assign({}, this.itemStyle, this.itemActiveStyle)
: this.itemStyle;
}
initDragstartEvent(event) {
var _a;
// it is necessary for mozilla
// data type should be 'Text' instead of 'text/plain' to keep compatibility
// with IE
(_a = event.dataTransfer) === null || _a === void 0 ? void 0 : _a.setData('Text', 'placeholder');
}
}
SortableComponent.globalZoneIndex = 0;
SortableComponent.decorators = [
{ type: Component, args: [{
selector: 'bs-sortable',
exportAs: 'bs-sortable',
template: `
<div
[ngClass]="wrapperClass"
[ngStyle]="wrapperStyle"
(dragover)="cancelEvent($event)"
(dragenter)="cancelEvent($event)"
(drop)="resetActiveItem($event)"
(mouseleave)="resetActiveItem($event)">
<div
*ngIf="showPlaceholder"
[ngClass]="placeholderClass"
[ngStyle]="placeholderStyle"
(dragover)="onItemDragover($event, 0)"
(dragenter)="cancelEvent($event)"
>{{placeholderItem}}</div>
<div
*ngFor="let item of items; let i=index;"
[ngClass]="[ itemClass, i === activeItem ? itemActiveClass : '' ]"
[ngStyle]="getItemStyle(i === activeItem)"
draggable="true"
(dragstart)="onItemDragstart($event, item, i)"
(dragend)="resetActiveItem($event)"
(dragover)="onItemDragover($event, i)"
(dragenter)="cancelEvent($event)"
aria-dropeffect="move"
[attr.aria-grabbed]="i === activeItem"
><ng-template [ngTemplateOutlet]="itemTemplate || defItemTemplate"
[ngTemplateOutletContext]="{item:item, index: i}"></ng-template></div>
</div>
<ng-template #defItemTemplate let-item="item">{{item.value}}</ng-template>
`,
providers: [
{
provide: NG_VALUE_ACCESSOR,
useExisting: forwardRef(() => SortableComponent),
multi: true
}
]
},] }
];
SortableComponent.ctorParameters = () => [
{ type: DraggableItemService }
];
SortableComponent.propDecorators = {
fieldName: [{ type: Input }],
wrapperClass: [{ type: Input }],
wrapperStyle: [{ type: Input }],
itemClass: [{ type: Input }],
itemStyle: [{ type: Input }],
itemActiveClass: [{ type: Input }],
itemActiveStyle: [{ type: Input }],
placeholderClass: [{ type: Input }],
placeholderStyle: [{ type: Input }],
placeholderItem: [{ type: Input }],
itemTemplate: [{ type: Input }],
onChange: [{ type: Output }]
};
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