carbon-components-angular
Version:
Next generation components
96 lines • 13.1 kB
JavaScript
import { Injector, Injectable, inject, EnvironmentInjector } from "@angular/core";
import { tap, delay } from "rxjs/operators";
import * as i0 from "@angular/core";
import * as i1 from "carbon-components-angular/placeholder";
/**
* Modal service handles instantiating and destroying modal instances.
* Uses PlaceholderService to track open instances, and for it's placeholder view reference.
*/
export class BaseModalService {
/**
* Creates an instance of `ModalService`.
*/
constructor(placeholderService) {
this.placeholderService = placeholderService;
/**
* Current module/component injection enviornment
* Allows modules to use providers from calling component
*
* Root Module/
* └── Lazy loaded Feature Module/
* ├── Provides Service & imports modules
* ├── Modal component (component that extends base component)
* └── Modal component launcher (dynamically creates modal component)
*
* Passing EnvironmentInjector in `createComponent` will look for provider declaration in feature
* module instead of root module. This is required to pass correct context in a lazy-loaded applications.
* Services injected in root, will also be available as feature module enviornment will also hierarchically inherit
* the root services.
*/
this.environment = inject(EnvironmentInjector);
}
/**
* Creates and renders the modal component that is passed in.
* `inputs` is an optional parameter of `data` that can be passed to the `Modal` component.
*/
create(data) {
let defaults = { inputs: {} };
data = Object.assign({}, defaults, data);
const inputProviders = Object.keys(data.inputs).map(inputName => ({
provide: inputName,
useValue: data.inputs[inputName]
}));
const injector = Injector.create({ providers: inputProviders });
const component = this.placeholderService.createComponent(data.component, injector, undefined, this.environment);
let focusedElement = document.activeElement;
setTimeout(() => {
component.instance.open = true;
});
component["previouslyFocusedElement"] = focusedElement; // used to return focus to previously focused element
component.instance.close.pipe(
// trigger the close animation
tap(() => {
component.instance.open = false;
}),
// delay closing by an arbitrary amount to allow the animation to finish
delay(240)).subscribe(() => {
this.placeholderService.destroyComponent(component);
// filter out our component
BaseModalService.modalList = BaseModalService.modalList.filter(c => c !== component);
});
component.onDestroy(() => {
focusedElement.focus();
});
BaseModalService.modalList.push(component);
return component;
}
/**
* Destroys the modal on the supplied index.
* When called without parameters it destroys the most recently created/top most modal.
*/
destroy(index = -1) {
// return if nothing to destroy because it's already destroyed
if (index >= BaseModalService.modalList.length || BaseModalService.modalList.length === 0) {
return;
}
// on negative index destroy the last on the list (top modal)
if (index < 0) {
index = BaseModalService.modalList.length - 1;
}
// Let animation finish before component is removed
setTimeout(() => {
if (BaseModalService.modalList[index]) {
this.placeholderService.destroyComponent(BaseModalService.modalList[index]);
BaseModalService.modalList.splice(index, 1);
}
}, 240);
}
}
// track all our open modals
BaseModalService.modalList = [];
BaseModalService.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "14.3.0", ngImport: i0, type: BaseModalService, deps: [{ token: i1.PlaceholderService }], target: i0.ɵɵFactoryTarget.Injectable });
BaseModalService.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "14.3.0", ngImport: i0, type: BaseModalService });
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "14.3.0", ngImport: i0, type: BaseModalService, decorators: [{
type: Injectable
}], ctorParameters: function () { return [{ type: i1.PlaceholderService }]; } });
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This is required to pass correct context in a lazy-loaded applications.\n\t * Services injected in root, will also be available as feature module enviornment will also hierarchically inherit\n\t * the root services.\n\t */\n\tprotected environment: EnvironmentInjector = inject(EnvironmentInjector);\n\n\t/**\n\t * Creates an instance of `ModalService`.\n\t */\n\tconstructor(public placeholderService: PlaceholderService) {}\n\n\t/**\n\t * Creates and renders the modal component that is passed in.\n\t * `inputs` is an optional parameter of `data` that can be passed to the `Modal` component.\n\t */\n\tcreate<T>(data: { component: any, inputs?: any }): ComponentRef<any> {\n\t\tlet defaults = { inputs: {} };\n\t\tdata = Object.assign({}, defaults, data);\n\n\t\tconst inputProviders = Object.keys(data.inputs).map(inputName => ({\n\t\t\tprovide: inputName,\n\t\t\tuseValue: data.inputs[inputName]\n\t\t}));\n\t\tconst injector = Injector.create({ providers: inputProviders });\n\t\tconst component = this.placeholderService.createComponent(\n\t\t\tdata.component,\n\t\t\tinjector,\n\t\t\tundefined,\n\t\t\tthis.environment\n\t\t);\n\t\tlet focusedElement = document.activeElement as HTMLElement;\n\t\tsetTimeout(() => {\n\t\t\tcomponent.instance.open = true;\n\t\t});\n\n\t\tcomponent[\"previouslyFocusedElement\"] = focusedElement;  // used to return focus to previously focused element\n\n\t\tcomponent.instance.close.pipe(\n\t\t\t// trigger the close animation\n\t\t\ttap(() => {\n\t\t\t\tcomponent.instance.open = false;\n\t\t\t}),\n\t\t\t// delay closing by an arbitrary amount to allow the animation to finish\n\t\t\tdelay(240)\n\t\t).subscribe(() => {\n\t\t\tthis.placeholderService.destroyComponent(component);\n\t\t\t// filter out our component\n\t\t\tBaseModalService.modalList = BaseModalService.modalList.filter(c => c !== component);\n\t\t});\n\n\t\tcomponent.onDestroy(() => {\n\t\t\tfocusedElement.focus();\n\t\t});\n\n\t\tBaseModalService.modalList.push(component);\n\n\t\treturn component;\n\t}\n\n\t/**\n\t * Destroys the modal on the supplied index.\n\t * When called without parameters it destroys the most recently created/top most modal.\n\t */\n\tdestroy(index = -1) {\n\t\t// return if nothing to destroy because it's already destroyed\n\t\tif (index >= BaseModalService.modalList.length || BaseModalService.modalList.length === 0) {\n\t\t\treturn;\n\t\t}\n\t\t// on negative index destroy the last on the list (top modal)\n\t\tif (index < 0) {\n\t\t\tindex = BaseModalService.modalList.length - 1;\n\t\t}\n\n\t\t// Let animation finish before component is removed\n\t\tsetTimeout(() => {\n\t\t\tif (BaseModalService.modalList[index]) {\n\t\t\t\tthis.placeholderService.destroyComponent(BaseModalService.modalList[index]);\n\t\t\t\tBaseModalService.modalList.splice(index, 1);\n\t\t\t}\n\t\t}, 240);\n\t}\n}\n"]}