angular6-json-schema-form
Version:
Angular JSON Schema Form builder
132 lines • 17.8 kB
JavaScript
import * as tslib_1 from "tslib";
import { Directive, ElementRef, Input, NgZone } from '@angular/core';
import { JsonSchemaFormService } from '../json-schema-form.service';
/**
* OrderableDirective
*
* Enables array elements to be reordered by dragging and dropping.
*
* Only works for arrays that have at least two elements.
*
* Also detects arrays-within-arrays, and correctly moves either
* the child array element or the parent array element,
* depending on the drop targert.
*
* Listeners for movable element being dragged:
* - dragstart: add 'dragging' class to element, set effectAllowed = 'move'
* - dragover: set dropEffect = 'move'
* - dragend: remove 'dragging' class from element
*
* Listeners for stationary items being dragged over:
* - dragenter: add 'drag-target-...' classes to element
* - dragleave: remove 'drag-target-...' classes from element
* - drop: remove 'drag-target-...' classes from element, move dropped array item
*/
let OrderableDirective = class OrderableDirective {
constructor(elementRef, jsf, ngZone) {
this.elementRef = elementRef;
this.jsf = jsf;
this.ngZone = ngZone;
this.overParentElement = false;
this.overChildElement = false;
}
ngOnInit() {
if (this.orderable && this.layoutNode && this.layoutIndex && this.dataIndex) {
this.element = this.elementRef.nativeElement;
this.element.draggable = true;
this.arrayLayoutIndex = 'move:' + this.layoutIndex.slice(0, -1).toString();
this.ngZone.runOutsideAngular(() => {
// Listeners for movable element being dragged:
this.element.addEventListener('dragstart', (event) => {
event.dataTransfer.effectAllowed = 'move';
event.dataTransfer.setData('text', '');
// Hack to bypass stupid HTML drag-and-drop dataTransfer protection
// so drag source info will be available on dragenter
const sourceArrayIndex = this.dataIndex[this.dataIndex.length - 1];
sessionStorage.setItem(this.arrayLayoutIndex, sourceArrayIndex + '');
});
this.element.addEventListener('dragover', (event) => {
if (event.preventDefault) {
event.preventDefault();
}
event.dataTransfer.dropEffect = 'move';
return false;
});
// Listeners for stationary items being dragged over:
this.element.addEventListener('dragenter', (event) => {
// Part 1 of a hack, inspired by Dragster, to simulate mouseover and mouseout
// behavior while dragging items - http://bensmithett.github.io/dragster/
if (this.overParentElement) {
return this.overChildElement = true;
}
else {
this.overParentElement = true;
}
const sourceArrayIndex = sessionStorage.getItem(this.arrayLayoutIndex);
if (sourceArrayIndex !== null) {
if (this.dataIndex[this.dataIndex.length - 1] < +sourceArrayIndex) {
this.element.classList.add('drag-target-top');
}
else if (this.dataIndex[this.dataIndex.length - 1] > +sourceArrayIndex) {
this.element.classList.add('drag-target-bottom');
}
}
});
this.element.addEventListener('dragleave', (event) => {
// Part 2 of the Dragster hack
if (this.overChildElement) {
this.overChildElement = false;
}
else if (this.overParentElement) {
this.overParentElement = false;
}
const sourceArrayIndex = sessionStorage.getItem(this.arrayLayoutIndex);
if (!this.overParentElement && !this.overChildElement && sourceArrayIndex !== null) {
this.element.classList.remove('drag-target-top');
this.element.classList.remove('drag-target-bottom');
}
});
this.element.addEventListener('drop', (event) => {
this.element.classList.remove('drag-target-top');
this.element.classList.remove('drag-target-bottom');
// Confirm that drop target is another item in the same array as source item
const sourceArrayIndex = sessionStorage.getItem(this.arrayLayoutIndex);
const destArrayIndex = this.dataIndex[this.dataIndex.length - 1];
if (sourceArrayIndex !== null && +sourceArrayIndex !== destArrayIndex) {
// Move array item
this.jsf.moveArrayItem(this, +sourceArrayIndex, destArrayIndex);
}
sessionStorage.removeItem(this.arrayLayoutIndex);
return false;
});
});
}
}
};
tslib_1.__decorate([
Input(),
tslib_1.__metadata("design:type", Boolean)
], OrderableDirective.prototype, "orderable", void 0);
tslib_1.__decorate([
Input(),
tslib_1.__metadata("design:type", Object)
], OrderableDirective.prototype, "layoutNode", void 0);
tslib_1.__decorate([
Input(),
tslib_1.__metadata("design:type", Array)
], OrderableDirective.prototype, "layoutIndex", void 0);
tslib_1.__decorate([
Input(),
tslib_1.__metadata("design:type", Array)
], OrderableDirective.prototype, "dataIndex", void 0);
OrderableDirective = tslib_1.__decorate([
Directive({
// tslint:disable-next-line:directive-selector
selector: '[orderable]',
}),
tslib_1.__metadata("design:paramtypes", [ElementRef,
JsonSchemaFormService,
NgZone])
], OrderableDirective);
export { OrderableDirective };
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dragstart: add 'dragging' class to element, set effectAllowed = 'move'\n * - dragover: set dropEffect = 'move'\n * - dragend: remove 'dragging' class from element\n *\n * Listeners for stationary items being dragged over:\n * - dragenter: add 'drag-target-...' classes to element\n * - dragleave: remove 'drag-target-...' classes from element\n * - drop: remove 'drag-target-...' classes from element, move dropped array item\n */\n@Directive({\n  // tslint:disable-next-line:directive-selector\n  selector: '[orderable]',\n})\nexport class OrderableDirective implements OnInit {\n  arrayLayoutIndex: string;\n  element: any;\n  overParentElement = false;\n  overChildElement = false;\n  @Input() orderable: boolean;\n  @Input() layoutNode: any;\n  @Input() layoutIndex: number[];\n  @Input() dataIndex: number[];\n\n  constructor(\n    private elementRef: ElementRef,\n    private jsf: JsonSchemaFormService,\n    private ngZone: NgZone\n  ) { }\n\n  ngOnInit() {\n    if (this.orderable && this.layoutNode && this.layoutIndex && this.dataIndex) {\n      this.element = this.elementRef.nativeElement;\n      this.element.draggable = true;\n      this.arrayLayoutIndex = 'move:' + this.layoutIndex.slice(0, -1).toString();\n\n      this.ngZone.runOutsideAngular(() => {\n\n        // Listeners for movable element being dragged:\n\n        this.element.addEventListener('dragstart', (event) => {\n          event.dataTransfer.effectAllowed = 'move';\n          event.dataTransfer.setData('text', '');\n          // Hack to bypass stupid HTML drag-and-drop dataTransfer protection\n          // so drag source info will be available on dragenter\n          const sourceArrayIndex = this.dataIndex[this.dataIndex.length - 1];\n          sessionStorage.setItem(this.arrayLayoutIndex, sourceArrayIndex + '');\n        });\n\n        this.element.addEventListener('dragover', (event) => {\n          if (event.preventDefault) { event.preventDefault(); }\n          event.dataTransfer.dropEffect = 'move';\n          return false;\n        });\n\n        // Listeners for stationary items being dragged over:\n\n        this.element.addEventListener('dragenter', (event) => {\n          // Part 1 of a hack, inspired by Dragster, to simulate mouseover and mouseout\n          // behavior while dragging items - http://bensmithett.github.io/dragster/\n          if (this.overParentElement) {\n            return this.overChildElement = true;\n          } else {\n            this.overParentElement = true;\n          }\n\n          const sourceArrayIndex = sessionStorage.getItem(this.arrayLayoutIndex);\n          if (sourceArrayIndex !== null) {\n            if (this.dataIndex[this.dataIndex.length - 1] < +sourceArrayIndex) {\n              this.element.classList.add('drag-target-top');\n            } else if (this.dataIndex[this.dataIndex.length - 1] > +sourceArrayIndex) {\n              this.element.classList.add('drag-target-bottom');\n            }\n          }\n        });\n\n        this.element.addEventListener('dragleave', (event) => {\n          // Part 2 of the Dragster hack\n          if (this.overChildElement) {\n            this.overChildElement = false;\n          } else if (this.overParentElement) {\n            this.overParentElement = false;\n          }\n\n          const sourceArrayIndex = sessionStorage.getItem(this.arrayLayoutIndex);\n          if (!this.overParentElement && !this.overChildElement && sourceArrayIndex !== null) {\n            this.element.classList.remove('drag-target-top');\n            this.element.classList.remove('drag-target-bottom');\n          }\n        });\n\n        this.element.addEventListener('drop', (event) => {\n          this.element.classList.remove('drag-target-top');\n          this.element.classList.remove('drag-target-bottom');\n          // Confirm that drop target is another item in the same array as source item\n          const sourceArrayIndex = sessionStorage.getItem(this.arrayLayoutIndex);\n          const destArrayIndex = this.dataIndex[this.dataIndex.length - 1];\n          if (sourceArrayIndex !== null && +sourceArrayIndex !== destArrayIndex) {\n            // Move array item\n            this.jsf.moveArrayItem(this, +sourceArrayIndex, destArrayIndex);\n          }\n          sessionStorage.removeItem(this.arrayLayoutIndex);\n          return false;\n        });\n\n      });\n    }\n  }\n}\n"]}