ng-dynamic-component
Version:
> Dynamic components with full life-cycle support for inputs and outputs
89 lines • 12.2 kB
JavaScript
import { Directive, Inject, Input, Optional, } from '@angular/core';
import { DynamicComponentInjectorToken, } from '../component-injector';
import * as i0 from "@angular/core";
/**
* @public
*/
export class DynamicAttributesDirective {
constructor(renderer, differs, componentInjector) {
this.renderer = renderer;
this.differs = differs;
this.componentInjector = componentInjector;
this.attrsDiffer = this.differs.find({}).create();
}
get _attributes() {
return (this.ndcDynamicAttributes ||
this.ngComponentOutletNdcDynamicAttributes ||
{});
}
get nativeElement() {
return this.componentInjector?.componentRef?.location.nativeElement;
}
get compType() {
return this.componentInjector?.componentRef?.componentType;
}
get isCompChanged() {
if (this.lastCompType !== this.compType) {
this.lastCompType = this.compType;
return true;
}
return false;
}
ngDoCheck() {
const isCompChanged = this.isCompChanged;
const changes = this.attrsDiffer.diff(this._attributes);
if (changes) {
this.lastAttrActions = this.changesToAttrActions(changes);
}
if (changes || (isCompChanged && this.lastAttrActions)) {
this.updateAttributes(this.lastAttrActions);
}
}
setAttribute(name, value, namespace) {
if (this.nativeElement) {
this.renderer.setAttribute(this.nativeElement, name, value, namespace);
}
}
removeAttribute(name, namespace) {
if (this.nativeElement) {
this.renderer.removeAttribute(this.nativeElement, name, namespace);
}
}
updateAttributes(actions) {
if (!this.compType || !actions) {
return;
}
Object.keys(actions.set).forEach((key) => this.setAttribute(key, actions.set[key]));
actions.remove.forEach((key) => this.removeAttribute(key));
}
changesToAttrActions(changes) {
const attrActions = {
set: {},
remove: [],
};
changes.forEachAddedItem((r) => (attrActions.set[r.key] = r.currentValue));
changes.forEachChangedItem((r) => (attrActions.set[r.key] = r.currentValue));
changes.forEachRemovedItem((r) => attrActions.remove.push(r.key));
return attrActions;
}
}
/** @nocollapse */ DynamicAttributesDirective.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "14.1.3", ngImport: i0, type: DynamicAttributesDirective, deps: [{ token: i0.Renderer2 }, { token: i0.KeyValueDiffers }, { token: DynamicComponentInjectorToken, optional: true }], target: i0.ɵɵFactoryTarget.Directive });
/** @nocollapse */ DynamicAttributesDirective.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "14.1.3", type: DynamicAttributesDirective, isStandalone: true, selector: "[ndcDynamicAttributes],[ngComponentOutletNdcDynamicAttributes]", inputs: { ndcDynamicAttributes: "ndcDynamicAttributes", ngComponentOutletNdcDynamicAttributes: "ngComponentOutletNdcDynamicAttributes" }, exportAs: ["ndcDynamicAttributes"], ngImport: i0 });
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "14.1.3", ngImport: i0, type: DynamicAttributesDirective, decorators: [{
type: Directive,
args: [{
selector: '[ndcDynamicAttributes],[ngComponentOutletNdcDynamicAttributes]',
exportAs: 'ndcDynamicAttributes',
standalone: true,
}]
}], ctorParameters: function () { return [{ type: i0.Renderer2 }, { type: i0.KeyValueDiffers }, { type: undefined, decorators: [{
type: Inject,
args: [DynamicComponentInjectorToken]
}, {
type: Optional
}] }]; }, propDecorators: { ndcDynamicAttributes: [{
type: Input
}], ngComponentOutletNdcDynamicAttributes: [{
type: Input
}] } });
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{\n  Directive,\n  DoCheck,\n  Inject,\n  Input,\n  KeyValueChanges,\n  KeyValueDiffers,\n  Optional,\n  Renderer2,\n  Type,\n} from '@angular/core';\n\nimport {\n  DynamicComponentInjector,\n  DynamicComponentInjectorToken,\n} from '../component-injector';\n\n/**\n * @public\n */\nexport interface AttributesMap {\n  [key: string]: string;\n}\n\ninterface AttributeActions {\n  set: AttributesMap;\n  remove: string[];\n}\n\n/**\n * @public\n */\n@Directive({\n  selector: '[ndcDynamicAttributes],[ngComponentOutletNdcDynamicAttributes]',\n  exportAs: 'ndcDynamicAttributes',\n  standalone: true,\n})\nexport class DynamicAttributesDirective implements DoCheck {\n  @Input()\n  ndcDynamicAttributes?: AttributesMap | null;\n  @Input()\n  ngComponentOutletNdcDynamicAttributes?: AttributesMap | null;\n\n  private attrsDiffer = this.differs.find({}).create<string, string>();\n  private lastCompType?: Type<unknown>;\n  private lastAttrActions?: AttributeActions;\n\n  private get _attributes() {\n    return (\n      this.ndcDynamicAttributes ||\n      this.ngComponentOutletNdcDynamicAttributes ||\n      {}\n    );\n  }\n\n  private get nativeElement() {\n    return this.componentInjector?.componentRef?.location.nativeElement;\n  }\n\n  private get compType() {\n    return this.componentInjector?.componentRef?.componentType;\n  }\n\n  private get isCompChanged() {\n    if (this.lastCompType !== this.compType) {\n      this.lastCompType = this.compType;\n      return true;\n    }\n    return false;\n  }\n\n  constructor(\n    private renderer: Renderer2,\n    private differs: KeyValueDiffers,\n    @Inject(DynamicComponentInjectorToken)\n    @Optional()\n    private componentInjector?: DynamicComponentInjector,\n  ) {}\n\n  ngDoCheck(): void {\n    const isCompChanged = this.isCompChanged;\n    const changes = this.attrsDiffer.diff(this._attributes);\n\n    if (changes) {\n      this.lastAttrActions = this.changesToAttrActions(changes);\n    }\n\n    if (changes || (isCompChanged && this.lastAttrActions)) {\n      this.updateAttributes(this.lastAttrActions);\n    }\n  }\n\n  setAttribute(name: string, value: string, namespace?: string) {\n    if (this.nativeElement) {\n      this.renderer.setAttribute(this.nativeElement, name, value, namespace);\n    }\n  }\n\n  removeAttribute(name: string, namespace?: string) {\n    if (this.nativeElement) {\n      this.renderer.removeAttribute(this.nativeElement, name, namespace);\n    }\n  }\n\n  private updateAttributes(actions?: AttributeActions) {\n    if (!this.compType || !actions) {\n      return;\n    }\n\n    Object.keys(actions.set).forEach((key) =>\n      this.setAttribute(key, actions.set[key]),\n    );\n\n    actions.remove.forEach((key) => this.removeAttribute(key));\n  }\n\n  private changesToAttrActions(\n    changes: KeyValueChanges<string, string>,\n  ): AttributeActions {\n    const attrActions: AttributeActions = {\n      set: {},\n      remove: [],\n    };\n\n    changes.forEachAddedItem((r) => (attrActions.set[r.key] = r.currentValue!));\n    changes.forEachChangedItem(\n      (r) => (attrActions.set[r.key] = r.currentValue!),\n    );\n    changes.forEachRemovedItem((r) => attrActions.remove.push(r.key));\n\n    return attrActions;\n  }\n}\n"]}