ngx-explorer-dnd
Version:
## _Drag & Drop in Angular like in a desktop explorer!_
217 lines • 26.7 kB
JavaScript
import { DOCUMENT } from '@angular/common';
import { Directive, EventEmitter, HostListener, Inject, Input, Output, } from '@angular/core';
import { EXPLORER_DND_CONTAINER, } from './ngx-explorer-container.directive';
import { extendStyles } from '../core/css-helper';
import * as i0 from "@angular/core";
import * as i1 from "./ngx-explorer-container.directive";
export class NgxDragSelectionDirective {
//#endregion
constructor(_document, _parentDrag) {
this._document = _document;
this._parentDrag = _parentDrag;
/** The current x position of the selection div. */
this.startX = 0;
/** The current y position of the selection div. */
this.startY = 0;
/**
* The initial x position of the selection div.
* Will be used to handle negative x position.
*/
this.initialX = 0;
/**
* The initial y position of the selection div.
* Will be used to handle negative y position.
*/
this.initialY = 0;
/**
* Will be used to set current selected elements to check has
* the current selected elements changed to before.
*/
this.selectedElements = new Set();
/** The current x position from the fired event. */
this.currentX = 0;
/** the current y position from the fired event. */
this.currentY = 0;
/** The current calculated width of the selection div. */
this.currentWidth = 0;
/** The current calculated height of the selection div. */
this.currentHeight = 0;
/** Will be true if selection in progress. */
this.selectingInProgress = false;
/** Sets whether ngx-drag-selection can be used. */
this.selectionAllowed = true;
/** Event emitted when the selected elements are changed. */
this.selectedElementsChange = new EventEmitter();
}
//#region Helper
/** Checks if a registered element of type `ngx-explorer-item` inside the selection div rect. */
checkIfElementInsideRect(rect, selectionBorder) {
if (((selectionBorder.x >= rect.x &&
selectionBorder.x <= rect.x + rect.width) ||
(selectionBorder.x <= rect.x &&
selectionBorder.x + selectionBorder.width >= rect.x)) &&
((selectionBorder.y >= rect.y &&
selectionBorder.y <= rect.y + rect.height) ||
(selectionBorder.y <= rect.y &&
selectionBorder.y + selectionBorder.height >= rect.y))) {
return true;
}
else {
return false;
}
}
/** Checks whether the selected elements have changed. */
checkIfSelectedElementsChanged(items) {
let changed = false;
for (let item of items) {
if (!this.selectedElements.has(item)) {
// data has changed...
changed = true;
}
}
if (!changed) {
if (this.selectedElements.size !== items.length)
changed = true;
}
if (changed)
// Changed? So "reset" selectedElements
this.selectedElements = new Set(items);
return changed;
}
/** Creates the selection div into document.body. */
createSelectionDiv() {
if (this.selectionDivElement) {
this.selectionDiv = this.selectionDivElement;
extendStyles(this.selectionDiv.style, {
display: 'none',
position: 'fixed',
top: '0',
left: '0',
width: '0px',
height: '0px',
});
}
else {
this.selectionDiv = document.createElement('div');
extendStyles(this.selectionDiv.style, {
display: 'none',
position: 'fixed',
opacity: '0.5',
top: '0',
left: '0',
'border-style': 'solid',
'border-radius': '6px',
'border-width': '0',
'border-color': '#7a7afa',
'background-color': '#add8e6',
width: '0px',
height: '0px',
});
}
this._document.body.appendChild(this.selectionDiv);
}
/** On `mousemove` this will set the current position and width of the selection div. */
setSelectionDivPosition(mouseX, mouseY) {
this.currentX = mouseX;
this.currentY = mouseY;
this.currentWidth = this.currentX - this.startX;
this.currentHeight = this.currentY - this.startY;
if (this.initialX >= this.currentX) {
this.currentWidth = this.initialX - this.currentX;
this.startX = this.currentX;
}
if (this.initialY >= this.currentY) {
this.currentHeight = this.initialY - this.currentY;
this.startY = this.currentY;
}
// div is not visible on start
if (this.selectionDiv.style.display === 'none') {
this.selectionDiv.style.display = 'unset';
}
extendStyles(this.selectionDiv.style, {
left: this.startX + 'px',
top: this.startY + 'px',
width: this.currentWidth + 'px',
height: this.currentHeight + 'px',
});
}
//#region HostListener
onMouseDown(ev) {
if (!this.selectionAllowed) {
ev.preventDefault();
return;
}
if (!this.selectingInProgress) {
this.startX = ev.x;
this.startY = ev.y;
this.initialX = this.startX;
this.initialY = this.startY;
this.selectingInProgress = true;
this.createSelectionDiv();
this.setSelectionDivPosition(this.startX, this.startY);
}
}
onMouseMove(ev) {
if (!this.selectingInProgress || !this.selectionAllowed) {
ev.preventDefault();
return;
}
this.setSelectionDivPosition(ev.clientX, ev.clientY);
if (this._parentDrag) {
const data = this._parentDrag.getElementsInsideSelectionDiv(this.startX, this.startY, this.currentWidth, this.currentHeight);
const result = [];
if (data.length > 0) {
for (let _data of data) {
const fileFolderComponent = _data.getHostComponent();
if (fileFolderComponent) {
result.push(fileFolderComponent);
}
}
}
if (this.checkIfSelectedElementsChanged(result.map((data) => {
return data.__ngContext__;
}))) {
this.selectedElementsChange.emit({
count: result.length,
data: result,
});
}
}
}
onMouseUp(ev) {
if (this.selectingInProgress) {
this.selectingInProgress = false;
this._document.body.removeChild(this.selectionDiv);
}
}
}
NgxDragSelectionDirective.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "15.0.1", ngImport: i0, type: NgxDragSelectionDirective, deps: [{ token: DOCUMENT }, { token: EXPLORER_DND_CONTAINER }], target: i0.ɵɵFactoryTarget.Directive });
NgxDragSelectionDirective.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "15.0.1", type: NgxDragSelectionDirective, selector: "[ngxDragSelection]", inputs: { selectionAllowed: "selectionAllowed", selectionDivElement: "selectionDivElement" }, outputs: { selectedElementsChange: "selectedElementsChange" }, host: { listeners: { "document:mousedown": "onMouseDown($event)", "document:mousemove": "onMouseMove($event)", "document:mouseup": "onMouseUp($event)" } }, ngImport: i0 });
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "15.0.1", ngImport: i0, type: NgxDragSelectionDirective, decorators: [{
type: Directive,
args: [{
selector: '[ngxDragSelection]',
}]
}], ctorParameters: function () { return [{ type: Document, decorators: [{
type: Inject,
args: [DOCUMENT]
}] }, { type: i1.NgxExplorerContainerDirective, decorators: [{
type: Inject,
args: [EXPLORER_DND_CONTAINER]
}] }]; }, propDecorators: { selectionAllowed: [{
type: Input
}], selectionDivElement: [{
type: Input
}], selectedElementsChange: [{
type: Output
}], onMouseDown: [{
type: HostListener,
args: ['document:mousedown', ['$event']]
}], onMouseMove: [{
type: HostListener,
args: ['document:mousemove', ['$event']]
}], onMouseUp: [{
type: HostListener,
args: ['document:mouseup', ['$event']]
}] } });
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{ DOCUMENT } from '@angular/common';\nimport {\n  Directive,\n  EventEmitter,\n  HostListener,\n  Inject,\n  Input,\n  Output,\n} from '@angular/core';\nimport {\n  EXPLORER_DND_CONTAINER,\n  NgxExplorerContainerDirective,\n} from './ngx-explorer-container.directive';\nimport { extendStyles } from '../core/css-helper';\nimport { FileFolder } from '../core/file-folder';\n\n@Directive({\n  selector: '[ngxDragSelection]',\n})\nexport class NgxDragSelectionDirective {\n  /** The current x position of the selection div. */\n  private startX: number = 0;\n\n  /** The current y position of the selection div. */\n  private startY: number = 0;\n\n  /**\n   * The initial x position of the selection div.\n   * Will be used to handle negative x position.\n   */\n  private initialX: number = 0;\n\n  /**\n   * The initial y position of the selection div.\n   * Will be used to handle negative y position.\n   */\n  private initialY: number = 0;\n\n  /**\n   * Will be used to set current selected elements to check has\n   * the current selected elements changed to before.\n   */\n  private selectedElements: Set<number> = new Set<number>();\n\n  /** The current x position from the fired event. */\n  private currentX: number = 0;\n\n  /** the current y position from the fired event. */\n  private currentY: number = 0;\n\n  /** The current calculated width of the selection div. */\n  private currentWidth: number = 0;\n\n  /** The current calculated height of the selection div. */\n  private currentHeight: number = 0;\n\n  /** Will be true if selection in progress. */\n  private selectingInProgress: boolean = false;\n\n  /** The selection border created by this directive. */\n  private selectionDiv!: HTMLElement;\n\n  /** Sets whether ngx-drag-selection can be used.  */\n  @Input() selectionAllowed: boolean = true;\n\n  /** Set a custom selection div `HTMLElement`. */\n  @Input() selectionDivElement!: HTMLElement | null | undefined;\n\n  /** Event emitted when the selected elements are changed. */\n  @Output() selectedElementsChange: EventEmitter<{\n    count: number;\n    data: FileFolder[];\n  }> = new EventEmitter();\n\n  //#region Helper\n  /** Checks if a registered element of type `ngx-explorer-item` inside the selection div rect. */\n  checkIfElementInsideRect(\n    rect: any,\n    selectionBorder: { x: number; y: number; width: number; height: number }\n  ) {\n    if (\n      ((selectionBorder.x >= rect.x &&\n        selectionBorder.x <= rect.x + rect.width) ||\n        (selectionBorder.x <= rect.x &&\n          selectionBorder.x + selectionBorder.width >= rect.x)) &&\n      ((selectionBorder.y >= rect.y &&\n        selectionBorder.y <= rect.y + rect.height) ||\n        (selectionBorder.y <= rect.y &&\n          selectionBorder.y + selectionBorder.height >= rect.y))\n    ) {\n      return true;\n    } else {\n      return false;\n    }\n  }\n\n  /** Checks whether the selected elements have changed.  */\n  checkIfSelectedElementsChanged(items: number[]): boolean {\n    let changed: boolean = false;\n\n    for (let item of items) {\n      if (!this.selectedElements.has(item)) {\n        // data has changed...\n        changed = true;\n      }\n    }\n\n    if (!changed) {\n      if (this.selectedElements.size !== items.length) changed = true;\n    }\n\n    if (changed)\n      // Changed? So \"reset\" selectedElements\n      this.selectedElements = new Set(items);\n\n    return changed;\n  }\n\n  /** Creates the selection div into document.body. */\n  createSelectionDiv() {\n    if (this.selectionDivElement) {\n      this.selectionDiv = this.selectionDivElement;\n\n      extendStyles(this.selectionDiv.style, {\n        display: 'none',\n        position: 'fixed',\n        top: '0',\n        left: '0',\n        width: '0px',\n        height: '0px',\n      });\n    } else {\n      this.selectionDiv = document.createElement('div');\n\n      extendStyles(this.selectionDiv.style, {\n        display: 'none',\n        position: 'fixed',\n        opacity: '0.5',\n        top: '0',\n        left: '0',\n        'border-style': 'solid',\n        'border-radius': '6px',\n        'border-width': '0',\n        'border-color': '#7a7afa',\n        'background-color': '#add8e6',\n        width: '0px',\n        height: '0px',\n      });\n    }\n\n    this._document.body.appendChild(this.selectionDiv);\n  }\n\n  /** On `mousemove` this will set the current position and width of the selection div. */\n  setSelectionDivPosition(mouseX: number, mouseY: number) {\n    this.currentX = mouseX;\n    this.currentY = mouseY;\n    this.currentWidth = this.currentX - this.startX;\n    this.currentHeight = this.currentY - this.startY;\n    if (this.initialX >= this.currentX) {\n      this.currentWidth = this.initialX - this.currentX;\n      this.startX = this.currentX;\n    }\n    if (this.initialY >= this.currentY) {\n      this.currentHeight = this.initialY - this.currentY;\n      this.startY = this.currentY;\n    }\n\n    // div is not visible on start\n    if (this.selectionDiv.style.display === 'none') {\n      this.selectionDiv.style.display = 'unset';\n    }\n    extendStyles(this.selectionDiv.style, {\n      left: this.startX + 'px',\n      top: this.startY + 'px',\n      width: this.currentWidth + 'px',\n      height: this.currentHeight + 'px',\n    });\n  }\n  //#endregion\n\n  constructor(\n    @Inject(DOCUMENT) private _document: Document,\n    @Inject(EXPLORER_DND_CONTAINER)\n    private _parentDrag?: NgxExplorerContainerDirective\n  ) {}\n\n  //#region HostListener\n  @HostListener('document:mousedown', ['$event'])\n  onMouseDown(ev: any) {\n    if (!this.selectionAllowed) {\n      ev.preventDefault();\n      return;\n    }\n\n    if (!this.selectingInProgress) {\n      this.startX = ev.x;\n      this.startY = ev.y;\n      this.initialX = this.startX;\n      this.initialY = this.startY;\n\n      this.selectingInProgress = true;\n      this.createSelectionDiv();\n      this.setSelectionDivPosition(this.startX, this.startY);\n    }\n  }\n\n  @HostListener('document:mousemove', ['$event'])\n  onMouseMove(ev: any) {\n    if (!this.selectingInProgress || !this.selectionAllowed) {\n      ev.preventDefault();\n      return;\n    }\n    this.setSelectionDivPosition(ev.clientX, ev.clientY);\n\n    if (this._parentDrag) {\n      const data = this._parentDrag.getElementsInsideSelectionDiv(\n        this.startX,\n        this.startY,\n        this.currentWidth,\n        this.currentHeight\n      );\n      const result: FileFolder[] = [];\n      if (data.length > 0) {\n        for (let _data of data) {\n          const fileFolderComponent = _data.getHostComponent();\n          if (fileFolderComponent) {\n            result.push(fileFolderComponent);\n          }\n        }\n      }\n\n      if (\n        this.checkIfSelectedElementsChanged(\n          result.map((data) => {\n            return (data as any).__ngContext__;\n          })\n        )\n      ) {\n        this.selectedElementsChange.emit({\n          count: result.length,\n          data: result,\n        });\n      }\n    }\n  }\n\n  @HostListener('document:mouseup', ['$event'])\n  onMouseUp(ev: any) {\n    if (this.selectingInProgress) {\n      this.selectingInProgress = false;\n      this._document.body.removeChild(this.selectionDiv);\n    }\n  }\n  //#endregion\n}\n"]}