ng2-dragula
Version:
Simple drag and drop with dragula
254 lines • 37 kB
JavaScript
import { Injectable, Optional } from '@angular/core';
import { Group } from '../Group';
import { Subject } from 'rxjs';
import { filter, map } from 'rxjs/operators';
import { EventTypes, AllEvents } from '../EventTypes';
import { DrakeFactory } from '../DrakeFactory';
import * as i0 from "@angular/core";
import * as i1 from "../DrakeFactory";
const filterEvent = (eventType, filterDragType, projector) => (input) => {
return input.pipe(filter(({ event, name }) => {
return (event === eventType &&
(filterDragType === undefined || name === filterDragType));
}), map(({ name, args }) => projector(name, args)));
};
const elContainerSourceProjector = (name, [el, container, source]) => ({ name, el, container, source });
export class DragulaService {
constructor(drakeFactory) {
this.drakeFactory = drakeFactory;
this.groups = {};
this.dispatch$ = new Subject();
this.elContainerSource = (eventType) => (groupName) => this.dispatch$.pipe(filterEvent(eventType, groupName, elContainerSourceProjector));
/* https://github.com/bevacqua/dragula#drakeon-events */
// eslint-disable-next-line @typescript-eslint/member-ordering
this.cancel = this.elContainerSource(EventTypes.Cancel);
// eslint-disable-next-line @typescript-eslint/member-ordering
this.remove = this.elContainerSource(EventTypes.Remove);
// eslint-disable-next-line @typescript-eslint/member-ordering
this.shadow = this.elContainerSource(EventTypes.Shadow);
// eslint-disable-next-line @typescript-eslint/member-ordering
this.over = this.elContainerSource(EventTypes.Over);
// eslint-disable-next-line @typescript-eslint/member-ordering
this.out = this.elContainerSource(EventTypes.Out);
this.drag = (groupName) => this.dispatch$.pipe(filterEvent(EventTypes.Drag, groupName, (name, [el, source]) => ({ name, el, source })));
this.dragend = (groupName) => this.dispatch$.pipe(filterEvent(EventTypes.DragEnd, groupName, (name, [el]) => ({
name,
el,
})));
this.drop = (groupName) => this.dispatch$.pipe(filterEvent(EventTypes.Drop, groupName, (name, [el, target, source, sibling]) => {
return { name, el, target, source, sibling };
}));
this.cloned = (groupName) => this.dispatch$.pipe(filterEvent(EventTypes.Cloned, groupName, (name, [clone, original, cloneType]) => {
return { name, clone, original, cloneType };
}));
this.dropModel = (groupName) => this.dispatch$.pipe(filterEvent(EventTypes.DropModel, groupName, (name, [el, target, source, sibling, item, sourceModel, targetModel, sourceIndex, targetIndex,]) => {
return {
name,
el,
target,
source,
sibling,
item,
sourceModel,
targetModel,
sourceIndex,
targetIndex,
};
}));
this.removeModel = (groupName) => this.dispatch$.pipe(filterEvent(EventTypes.RemoveModel, groupName, (name, [el, container, source, item, sourceModel, sourceIndex]) => {
return {
name,
el,
container,
source,
item,
sourceModel,
sourceIndex,
};
}));
if (this.drakeFactory === null || this.drakeFactory === undefined) {
this.drakeFactory = new DrakeFactory();
}
}
/** Public mainly for testing purposes. Prefer `createGroup()`. */
add(group) {
const existingGroup = this.find(group.name);
if (existingGroup) {
throw new Error('Group named: "' + group.name + '" already exists.');
}
this.groups[group.name] = group;
this.handleModels(group);
this.setupEvents(group);
return group;
}
find(name) {
return this.groups[name];
}
destroy(name) {
const group = this.find(name);
if (!group) {
return;
}
group.drake && group.drake.destroy();
delete this.groups[name];
}
/**
* Creates a group with the specified name and options.
*
* Note: formerly known as `setOptions`
*/
createGroup(name, options) {
return this.add(new Group(name, this.drakeFactory.build([], options), options));
}
handleModels({ name, drake, options }) {
let dragElm;
let dragIndex;
let dropIndex;
drake.on('remove', (el, container, source) => {
if (!drake.models) {
return;
}
let sourceModel = drake.models[drake.containers.indexOf(source)];
sourceModel = sourceModel.slice(0); // clone it
const item = sourceModel.splice(dragIndex, 1)[0];
this.dispatch$.next({
event: EventTypes.RemoveModel,
name,
args: [el, container, source, item, sourceModel, dragIndex],
});
});
drake.on('drag', (el, source) => {
if (!drake.models) {
return;
}
dragElm = el;
dragIndex = this.domIndexOf(el, source);
});
drake.on('drop', (dropElm, target, source, sibling) => {
if (!drake.models || !target) {
return;
}
dropIndex = this.domIndexOf(dropElm, target);
let sourceModel = drake.models[drake.containers.indexOf(source)];
let targetModel = drake.models[drake.containers.indexOf(target)];
let item;
if (target === source) {
sourceModel = sourceModel.slice(0);
item = sourceModel.splice(dragIndex, 1)[0];
sourceModel.splice(dropIndex, 0, item);
// this was true before we cloned and updated sourceModel,
// but targetModel still has the old value
targetModel = sourceModel;
}
else {
const isCopying = dragElm !== dropElm;
item = sourceModel[dragIndex];
if (isCopying) {
if (!options.copyItem) {
throw new Error('If you have enabled `copy` on a group, you must provide a `copyItem` function.');
}
item = options.copyItem(item);
}
if (!isCopying) {
sourceModel = sourceModel.slice(0);
sourceModel.splice(dragIndex, 1);
}
targetModel = targetModel.slice(0);
targetModel.splice(dropIndex, 0, item);
if (isCopying) {
try {
target.removeChild(dropElm);
// eslint-disable-next-line no-empty
}
catch (e) { }
}
}
this.dispatch$.next({
event: EventTypes.DropModel,
name,
args: [
dropElm,
target,
source,
sibling,
item,
sourceModel,
targetModel,
dragIndex,
dropIndex,
],
});
});
}
setupEvents(group) {
if (group.initEvents) {
return;
}
group.initEvents = true;
const name = group.name;
// eslint-disable-next-line @typescript-eslint/no-this-alias
const that = this;
const emitter = (event) => {
switch (event) {
case EventTypes.Drag:
group.drake.on(event, (...args) => {
this.dispatch$.next({ event, name, args });
});
break;
case EventTypes.Drop:
group.drake.on(event, (...args) => {
this.dispatch$.next({ event, name, args });
});
break;
case EventTypes.DragEnd:
group.drake.on(event, (...args) => {
this.dispatch$.next({ event, name, args });
});
break;
case EventTypes.Cancel:
case EventTypes.Remove:
case EventTypes.Shadow:
case EventTypes.Over:
case EventTypes.Out:
group.drake.on(event, (...args) => {
this.dispatch$.next({ event, name, args });
});
break;
case EventTypes.Cloned:
group.drake.on(event, (...args) => {
this.dispatch$.next({ event, name, args });
});
break;
case EventTypes.DropModel:
group.drake.on(event, (...args) => {
this.dispatch$.next({ event, name, args });
});
break;
case EventTypes.RemoveModel:
group.drake.on(event, (...args) => {
this.dispatch$.next({ event, name, args });
});
break;
default:
break;
}
};
AllEvents.forEach(emitter);
}
domIndexOf(child, parent) {
if (parent) {
return Array.prototype.indexOf.call(parent.children, child);
}
}
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.1.5", ngImport: i0, type: DragulaService, deps: [{ token: i1.DrakeFactory, optional: true }], target: i0.ɵɵFactoryTarget.Injectable }); }
static { this.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "16.1.5", ngImport: i0, type: DragulaService, providedIn: 'root' }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.1.5", ngImport: i0, type: DragulaService, decorators: [{
type: Injectable,
args: [{
providedIn: 'root',
}]
}], ctorParameters: function () { return [{ type: i1.DrakeFactory, decorators: [{
type: Optional
}] }]; } });
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{ Injectable, Optional } from '@angular/core';\nimport { Group } from '../Group';\nimport { DragulaOptions } from '../DragulaOptions';\nimport { Subject, Observable } from 'rxjs';\nimport { filter, map } from 'rxjs/operators';\nimport { EventTypes, AllEvents } from '../EventTypes';\nimport { DrakeFactory } from '../DrakeFactory';\n\ntype FilterProjector<T extends { name: string }> = (\n  name: string,\n  args: any\n) => T;\ntype Dispatch = { event: EventTypes; name: string; args: any[] };\n\nconst filterEvent =\n  <\n    T extends {\n      name: string;\n      source?: any;\n      target?: any;\n      sourceModel?: any;\n      targetModel?: any;\n    }\n  >(\n    eventType: EventTypes,\n    filterDragType: string | undefined,\n    projector: FilterProjector<T>\n  ) =>\n  (input: Observable<Dispatch>): Observable<T> => {\n    return input.pipe(\n      filter(({ event, name }) => {\n        return (\n          event === eventType &&\n          (filterDragType === undefined || name === filterDragType)\n        );\n      }),\n      map(({ name, args }) => projector(name, args))\n    );\n  };\n\nconst elContainerSourceProjector = (\n  name: string,\n  [el, container, source]: [Element, Element, Element]\n) => ({ name, el, container, source });\n\n@Injectable({\n  providedIn: 'root',\n})\nexport class DragulaService {\n  private groups: { [k: string]: Group } = {};\n  private dispatch$ = new Subject<Dispatch>();\n  private elContainerSource = (eventType: EventTypes) => (groupName?: string) =>\n    this.dispatch$.pipe(\n      filterEvent(eventType, groupName, elContainerSourceProjector)\n    );\n  /* https://github.com/bevacqua/dragula#drakeon-events */\n  // eslint-disable-next-line @typescript-eslint/member-ordering\n  public cancel = this.elContainerSource(EventTypes.Cancel);\n  // eslint-disable-next-line @typescript-eslint/member-ordering\n  public remove = this.elContainerSource(EventTypes.Remove);\n  // eslint-disable-next-line @typescript-eslint/member-ordering\n  public shadow = this.elContainerSource(EventTypes.Shadow);\n  // eslint-disable-next-line @typescript-eslint/member-ordering\n  public over = this.elContainerSource(EventTypes.Over);\n  // eslint-disable-next-line @typescript-eslint/member-ordering\n  public out = this.elContainerSource(EventTypes.Out);\n\n  public drag = (groupName?: string) =>\n    this.dispatch$.pipe(\n      filterEvent(\n        EventTypes.Drag,\n        groupName,\n        (name, [el, source]: [Element, Element]) => ({ name, el, source })\n      )\n    );\n\n  public dragend = (groupName?: string) =>\n    this.dispatch$.pipe(\n      filterEvent(EventTypes.DragEnd, groupName, (name, [el]: [Element]) => ({\n        name,\n        el,\n      }))\n    );\n\n  public drop = (groupName?: string) =>\n    this.dispatch$.pipe(\n      filterEvent(\n        EventTypes.Drop,\n        groupName,\n        (\n          name,\n          [el, target, source, sibling]: [Element, Element, Element, Element]\n        ) => {\n          return { name, el, target, source, sibling };\n        }\n      )\n    );\n\n  public cloned = (groupName?: string) =>\n    this.dispatch$.pipe(\n      filterEvent(\n        EventTypes.Cloned,\n        groupName,\n        (\n          name,\n          [clone, original, cloneType]: [Element, Element, 'mirror' | 'copy']\n        ) => {\n          return { name, clone, original, cloneType };\n        }\n      )\n    );\n\n  public dropModel = <T = any>(groupName?: string) =>\n    this.dispatch$.pipe(\n      filterEvent(\n        EventTypes.DropModel,\n        groupName,\n        (\n          name,\n          [\n            el,\n            target,\n            source,\n            sibling,\n            item,\n            sourceModel,\n            targetModel,\n            sourceIndex,\n            targetIndex,\n          ]: [Element, Element, Element, Element, T, T[], T[], number, number]\n        ) => {\n          return {\n            name,\n            el,\n            target,\n            source,\n            sibling,\n            item,\n            sourceModel,\n            targetModel,\n            sourceIndex,\n            targetIndex,\n          };\n        }\n      )\n    );\n\n  public removeModel = <T = any>(groupName?: string) =>\n    this.dispatch$.pipe(\n      filterEvent(\n        EventTypes.RemoveModel,\n        groupName,\n        (\n          name,\n          [el, container, source, item, sourceModel, sourceIndex]: [\n            Element,\n            Element,\n            Element,\n            T,\n            T[],\n            number\n          ]\n        ) => {\n          return {\n            name,\n            el,\n            container,\n            source,\n            item,\n            sourceModel,\n            sourceIndex,\n          };\n        }\n      )\n    );\n\n  constructor(@Optional() private drakeFactory: DrakeFactory) {\n    if (this.drakeFactory === null || this.drakeFactory === undefined) {\n      this.drakeFactory = new DrakeFactory();\n    }\n  }\n\n  /** Public mainly for testing purposes. Prefer `createGroup()`. */\n  public add(group: Group): Group {\n    const existingGroup = this.find(group.name);\n    if (existingGroup) {\n      throw new Error('Group named: \"' + group.name + '\" already exists.');\n    }\n    this.groups[group.name] = group;\n    this.handleModels(group);\n    this.setupEvents(group);\n    return group;\n  }\n\n  public find(name: string): Group {\n    return this.groups[name];\n  }\n\n  public destroy(name: string): void {\n    const group = this.find(name);\n    if (!group) {\n      return;\n    }\n    group.drake && group.drake.destroy();\n    delete this.groups[name];\n  }\n\n  /**\n   * Creates a group with the specified name and options.\n   *\n   * Note: formerly known as `setOptions`\n   */\n  public createGroup<T = any>(name: string, options: DragulaOptions<T>): Group {\n    return this.add(\n      new Group(name, this.drakeFactory.build([], options), options)\n    );\n  }\n\n  private handleModels({ name, drake, options }: Group): void {\n    let dragElm: any;\n    let dragIndex: number;\n    let dropIndex: number;\n    drake.on('remove', (el: any, container: any, source: any) => {\n      if (!drake.models) {\n        return;\n      }\n      let sourceModel = drake.models[drake.containers.indexOf(source)];\n      sourceModel = sourceModel.slice(0); // clone it\n      const item = sourceModel.splice(dragIndex, 1)[0];\n      this.dispatch$.next({\n        event: EventTypes.RemoveModel,\n        name,\n        args: [el, container, source, item, sourceModel, dragIndex],\n      });\n    });\n    drake.on('drag', (el: any, source: any) => {\n      if (!drake.models) {\n        return;\n      }\n      dragElm = el;\n      dragIndex = this.domIndexOf(el, source);\n    });\n    drake.on(\n      'drop',\n      (dropElm: any, target: Element, source: Element, sibling?: Element) => {\n        if (!drake.models || !target) {\n          return;\n        }\n        dropIndex = this.domIndexOf(dropElm, target);\n        let sourceModel = drake.models[drake.containers.indexOf(source)];\n        let targetModel = drake.models[drake.containers.indexOf(target)];\n        let item: any;\n        if (target === source) {\n          sourceModel = sourceModel.slice(0);\n          item = sourceModel.splice(dragIndex, 1)[0];\n          sourceModel.splice(dropIndex, 0, item);\n          // this was true before we cloned and updated sourceModel,\n          // but targetModel still has the old value\n          targetModel = sourceModel;\n        } else {\n          const isCopying = dragElm !== dropElm;\n          item = sourceModel[dragIndex];\n          if (isCopying) {\n            if (!options.copyItem) {\n              throw new Error(\n                'If you have enabled `copy` on a group, you must provide a `copyItem` function.'\n              );\n            }\n            item = options.copyItem(item);\n          }\n\n          if (!isCopying) {\n            sourceModel = sourceModel.slice(0);\n            sourceModel.splice(dragIndex, 1);\n          }\n          targetModel = targetModel.slice(0);\n          targetModel.splice(dropIndex, 0, item);\n          if (isCopying) {\n            try {\n              target.removeChild(dropElm);\n              // eslint-disable-next-line no-empty\n            } catch (e) {}\n          }\n        }\n        this.dispatch$.next({\n          event: EventTypes.DropModel,\n          name,\n          args: [\n            dropElm,\n            target,\n            source,\n            sibling,\n            item,\n            sourceModel,\n            targetModel,\n            dragIndex,\n            dropIndex,\n          ],\n        });\n      }\n    );\n  }\n\n  private setupEvents(group: Group): void {\n    if (group.initEvents) {\n      return;\n    }\n    group.initEvents = true;\n    const name = group.name;\n    // eslint-disable-next-line @typescript-eslint/no-this-alias\n    const that: any = this;\n    const emitter = (event: EventTypes) => {\n      switch (event) {\n        case EventTypes.Drag:\n          group.drake.on(event, (...args: any[]) => {\n            this.dispatch$.next({ event, name, args });\n          });\n          break;\n        case EventTypes.Drop:\n          group.drake.on(event, (...args: any[]) => {\n            this.dispatch$.next({ event, name, args });\n          });\n          break;\n\n        case EventTypes.DragEnd:\n          group.drake.on(event, (...args: any[]) => {\n            this.dispatch$.next({ event, name, args });\n          });\n          break;\n        \n        case EventTypes.Cancel:\n        case EventTypes.Remove:\n        case EventTypes.Shadow:\n        case EventTypes.Over:\n        case EventTypes.Out:\n          group.drake.on(event, (...args: any[]) => {\n            this.dispatch$.next({ event, name, args });\n          });\n          break;\n\n        case EventTypes.Cloned:\n          group.drake.on(event, (...args: any[]) => {\n            this.dispatch$.next({ event, name, args });\n          });\n          break;\n        case EventTypes.DropModel:\n          group.drake.on(event, (...args: any[]) => {\n            this.dispatch$.next({ event, name, args });\n          });\n          break;\n\n        case EventTypes.RemoveModel:\n            group.drake.on(event, (...args: any[]) => {\n              this.dispatch$.next({ event, name, args });\n            });\n            break;\n        default:\n          break;\n      }\n    };\n    AllEvents.forEach(emitter);\n  }\n\n  private domIndexOf(child: any, parent: any): any {\n    if (parent) {\n      return Array.prototype.indexOf.call(parent.children, child);\n    }\n  }\n}\n"]}