@foblex/flow
Version:
An Angular library designed to simplify the creation and manipulation of dynamic flow. Provides components for flows, nodes, and connections, automating node manipulation and inter-node connections.
97 lines • 17 kB
JavaScript
import { Point, RectExtensions } from '@foblex/2d';
import { FExternalItemCreatePlaceholderRequest, FExternalItemCreatePreviewRequest } from '../../f-external-item';
import { FDragHandlerResult, PointBoundsLimiter } from '../../f-draggable';
import { BrowserService } from '@foblex/platform';
import { FMediator } from '@foblex/mediator';
import { FComponentsStore } from "../../f-storage";
import { GetNormalizedElementRectRequest } from "../../domain";
import { infinityMinMax } from "../../utils";
export class FExternalItemDragHandler {
_fExternalItem;
fEventType = 'external-item';
fData;
_fResult;
_fMediator;
_fBrowser;
_fComponentStore;
_preview;
_placeholder;
_onPointerDownRect = RectExtensions.initialize();
_fBoundsLimiter;
get _fItemHost() {
return this._fExternalItem.hostElement;
}
get _body() {
return this._fBrowser.document.fullscreenElement ?? this._fBrowser.document.body;
}
get _transform() {
return this._fComponentStore.fCanvas.transform;
}
_fItemHostDisplay;
constructor(_injector, _fExternalItem) {
this._fExternalItem = _fExternalItem;
this.fData = { fData: _fExternalItem.fData };
this._fResult = _injector.get(FDragHandlerResult);
this._fMediator = _injector.get(FMediator);
this._fBrowser = _injector.get(BrowserService);
this._fComponentStore = _injector.get(FComponentsStore);
this._fBoundsLimiter = new PointBoundsLimiter(_injector, this._getStartPoint(), infinityMinMax());
this._fItemHostDisplay = this._fItemHost.style.display;
}
_getStartPoint() {
return this._fMediator.execute(new GetNormalizedElementRectRequest(this._fExternalItem.hostElement));
}
prepareDragSequence() {
this._onPointerDownRect = this._getExternalItemRect();
this._createAndAppendPreview();
this._createAndAppendPlaceholder();
this._setFResultData();
}
_createAndAppendPreview() {
this._preview = this._fMediator.execute(new FExternalItemCreatePreviewRequest(this._fExternalItem));
if (this._fExternalItem.fPreviewMatchSize) {
this._matchElementSize(this._preview, this._onPointerDownRect);
}
this._preview.style.transform = setTransform(this._onPointerDownRect);
this._body.appendChild(this._preview);
}
_createAndAppendPlaceholder() {
this._placeholder = this._fMediator.execute(new FExternalItemCreatePlaceholderRequest(this._fExternalItem));
this._body.appendChild(this._fItemHost.parentElement.replaceChild(this._placeholder, this._fItemHost));
this._fItemHost.style.display = 'none';
}
_matchElementSize(target, sourceRect) {
target.style.width = `${sourceRect.width}px`;
target.style.height = `${sourceRect.height}px`;
}
_setFResultData() {
this._fResult.setData({
preview: this._preview,
fExternalItem: this._fExternalItem,
});
}
_getExternalItemRect() {
const rect = this._fExternalItem.hostElement.getBoundingClientRect();
const scrollTop = this._fBrowser.window.pageYOffset || this._fBrowser.document.documentElement.scrollTop;
const scrollLeft = this._fBrowser.window.pageXOffset || this._fBrowser.document.documentElement.scrollLeft;
const offsetTop = rect.top + scrollTop;
const offsetLeft = rect.left + scrollLeft;
return RectExtensions.initialize(offsetLeft, offsetTop, rect.width, rect.height);
}
onPointerMove(difference) {
const adjustCellSize = this._fComponentStore.fDraggable?.fCellSizeWhileDragging ?? false;
const differenceWithRestrictions = Point.fromPoint(this._fBoundsLimiter.limit(difference, adjustCellSize))
.mult(this._transform.scale);
const position = Point.fromPoint(this._onPointerDownRect).add(differenceWithRestrictions);
this._preview.style.transform = setTransform(position);
}
onPointerUp() {
this._body.removeChild(this._preview);
this._placeholder.parentElement.replaceChild(this._fItemHost, this._placeholder);
this._fItemHost.style.display = this._fItemHostDisplay ?? 'block';
}
}
function setTransform({ x, y }) {
return `translate3d(${Math.round(x)}px, ${Math.round(y)}px, 0)`;
}
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{IPoint, IRect, ITransformModel, Point, RectExtensions} from '@foblex/2d';\nimport {\n  FExternalItemBase,\n  FExternalItemCreatePlaceholderRequest,\n  FExternalItemCreatePreviewRequest,\n  IFExternalItemDragResult\n} from '../../f-external-item';\nimport {FDragHandlerResult, IFDragHandler, PointBoundsLimiter} from '../../f-draggable';\nimport {BrowserService} from '@foblex/platform';\nimport {FMediator} from '@foblex/mediator';\nimport {Injector} from '@angular/core';\nimport {FComponentsStore} from \"../../f-storage\";\nimport {GetNormalizedElementRectRequest} from \"../../domain\";\nimport {infinityMinMax} from \"../../utils\";\n\nexport class FExternalItemDragHandler implements IFDragHandler {\n\n  public fEventType = 'external-item';\n  public fData: any;\n\n  private readonly _fResult: FDragHandlerResult<IFExternalItemDragResult>;\n  private readonly _fMediator: FMediator;\n  private readonly _fBrowser: BrowserService;\n  private readonly _fComponentStore: FComponentsStore;\n\n  private _preview: HTMLElement | SVGElement | undefined;\n  private _placeholder: HTMLElement | SVGElement | undefined;\n  private _onPointerDownRect: IRect = RectExtensions.initialize();\n  private readonly _fBoundsLimiter: PointBoundsLimiter;\n\n  private get _fItemHost(): HTMLElement | SVGElement {\n    return this._fExternalItem.hostElement;\n  }\n\n  private get _body(): Element {\n    return this._fBrowser.document.fullscreenElement ?? this._fBrowser.document.body;\n  }\n\n  private get _transform(): ITransformModel {\n    return this._fComponentStore.fCanvas!.transform;\n  }\n\n  private readonly _fItemHostDisplay: string | undefined;\n\n  constructor(\n    _injector: Injector,\n    private _fExternalItem: FExternalItemBase,\n  ) {\n    this.fData = {fData: _fExternalItem.fData};\n    this._fResult = _injector.get(FDragHandlerResult);\n    this._fMediator = _injector.get(FMediator);\n    this._fBrowser = _injector.get(BrowserService);\n    this._fComponentStore = _injector.get(FComponentsStore);\n\n    this._fBoundsLimiter = new PointBoundsLimiter(\n      _injector, this._getStartPoint(), infinityMinMax()\n    );\n\n    this._fItemHostDisplay = this._fItemHost.style.display;\n  }\n\n  private _getStartPoint(): IPoint {\n    return this._fMediator.execute<IRect>(\n      new GetNormalizedElementRectRequest(this._fExternalItem.hostElement)\n    );\n  }\n\n  public prepareDragSequence(): void {\n    this._onPointerDownRect = this._getExternalItemRect();\n\n    this._createAndAppendPreview();\n    this._createAndAppendPlaceholder();\n\n    this._setFResultData();\n  }\n\n  private _createAndAppendPreview(): void {\n    this._preview = this._fMediator.execute<HTMLElement>(\n      new FExternalItemCreatePreviewRequest(this._fExternalItem)\n    );\n    if (this._fExternalItem.fPreviewMatchSize) {\n      this._matchElementSize(this._preview, this._onPointerDownRect);\n    }\n    this._preview!.style.transform = setTransform(this._onPointerDownRect);\n    this._body.appendChild(this._preview);\n  }\n\n  private _createAndAppendPlaceholder(): void {\n    this._placeholder = this._fMediator.execute<HTMLElement>(\n      new FExternalItemCreatePlaceholderRequest(this._fExternalItem)\n    );\n    this._body.appendChild(this._fItemHost.parentElement!.replaceChild(this._placeholder!, this._fItemHost));\n    this._fItemHost.style.display = 'none';\n  }\n\n  private _matchElementSize(target: HTMLElement, sourceRect: IRect): void {\n    target.style.width = `${sourceRect.width}px`;\n    target.style.height = `${sourceRect.height}px`;\n  }\n\n  private _setFResultData(): void {\n    this._fResult.setData({\n      preview: this._preview,\n      fExternalItem: this._fExternalItem,\n    });\n  }\n\n  private _getExternalItemRect(): IRect {\n    const rect = this._fExternalItem.hostElement.getBoundingClientRect();\n    const scrollTop = this._fBrowser.window.pageYOffset || this._fBrowser.document.documentElement.scrollTop;\n    const scrollLeft = this._fBrowser.window.pageXOffset || this._fBrowser.document.documentElement.scrollLeft;\n    const offsetTop = rect.top + scrollTop;\n    const offsetLeft = rect.left + scrollLeft;\n    return RectExtensions.initialize(offsetLeft, offsetTop, rect.width, rect.height);\n  }\n\n  public onPointerMove(difference: IPoint): void {\n    const adjustCellSize = this._fComponentStore.fDraggable?.fCellSizeWhileDragging ?? false;\n    const differenceWithRestrictions = Point.fromPoint(this._fBoundsLimiter.limit(difference, adjustCellSize))\n      .mult(this._transform.scale);\n\n    const position = Point.fromPoint(this._onPointerDownRect).add(differenceWithRestrictions);\n    this._preview!.style.transform = setTransform(position);\n  }\n\n  public onPointerUp(): void {\n    this._body.removeChild(this._preview!);\n\n    this._placeholder!.parentElement!.replaceChild(this._fItemHost, this._placeholder!);\n    this._fItemHost.style.display = this._fItemHostDisplay ?? 'block';\n  }\n}\n\nfunction setTransform({x, y}: IPoint): string {\n  return `translate3d(${Math.round(x)}px, ${Math.round(y)}px, 0)`;\n}\n\n"]}