@ng-bootstrap/ng-bootstrap
Version:
Angular powered Bootstrap
91 lines • 15 kB
JavaScript
import { Observable, merge } from 'rxjs';
import { share, filter, delay, map } from 'rxjs/operators';
export class Trigger {
constructor(open, close) {
this.open = open;
this.close = close;
if (!close) {
this.close = open;
}
}
isManual() { return this.open === 'manual' || this.close === 'manual'; }
}
const DEFAULT_ALIASES = {
'hover': ['mouseenter', 'mouseleave'],
'focus': ['focusin', 'focusout'],
};
export function parseTriggers(triggers, aliases = DEFAULT_ALIASES) {
const trimmedTriggers = (triggers || '').trim();
if (trimmedTriggers.length === 0) {
return [];
}
const parsedTriggers = trimmedTriggers.split(/\s+/).map(trigger => trigger.split(':')).map((triggerPair) => {
let alias = aliases[triggerPair[0]] || triggerPair;
return new Trigger(alias[0], alias[1]);
});
const manualTriggers = parsedTriggers.filter(triggerPair => triggerPair.isManual());
if (manualTriggers.length > 1) {
throw 'Triggers parse error: only one manual trigger is allowed';
}
if (manualTriggers.length === 1 && parsedTriggers.length > 1) {
throw 'Triggers parse error: manual trigger can\'t be mixed with other triggers';
}
return parsedTriggers;
}
export function observeTriggers(renderer, nativeElement, triggers, isOpenedFn) {
return new Observable(subscriber => {
const listeners = [];
const openFn = () => subscriber.next(true);
const closeFn = () => subscriber.next(false);
const toggleFn = () => subscriber.next(!isOpenedFn());
triggers.forEach((trigger) => {
if (trigger.open === trigger.close) {
listeners.push(renderer.listen(nativeElement, trigger.open, toggleFn));
}
else {
listeners.push(renderer.listen(nativeElement, trigger.open, openFn), renderer.listen(nativeElement, trigger.close, closeFn));
}
});
return () => { listeners.forEach(unsubscribeFn => unsubscribeFn()); };
});
}
const delayOrNoop = (time) => time > 0 ? delay(time) : (a) => a;
const ɵ0 = delayOrNoop;
export function triggerDelay(openDelay, closeDelay, isOpenedFn) {
return (input$) => {
let pending = null;
const filteredInput$ = input$.pipe(map(open => ({ open })), filter(event => {
const currentlyOpen = isOpenedFn();
if (currentlyOpen !== event.open && (!pending || pending.open === currentlyOpen)) {
pending = event;
return true;
}
if (pending && pending.open !== event.open) {
pending = null;
}
return false;
}), share());
const delayedOpen$ = filteredInput$.pipe(filter(event => event.open), delayOrNoop(openDelay));
const delayedClose$ = filteredInput$.pipe(filter(event => !event.open), delayOrNoop(closeDelay));
return merge(delayedOpen$, delayedClose$)
.pipe(filter(event => {
if (event === pending) {
pending = null;
return event.open !== isOpenedFn();
}
return false;
}), map(event => event.open));
};
}
export function listenToTriggers(renderer, nativeElement, triggers, isOpenedFn, openFn, closeFn, openDelay = 0, closeDelay = 0) {
const parsedTriggers = parseTriggers(triggers);
if (parsedTriggers.length === 1 && parsedTriggers[0].isManual()) {
return () => { };
}
const subscription = observeTriggers(renderer, nativeElement, parsedTriggers, isOpenedFn)
.pipe(triggerDelay(openDelay, closeDelay, isOpenedFn))
.subscribe(open => (open ? openFn() : closeFn()));
return () => subscription.unsubscribe();
}
export { ɵ0 };
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}\n}\n\nconst DEFAULT_ALIASES = {\n  'hover': ['mouseenter', 'mouseleave'],\n  'focus': ['focusin', 'focusout'],\n};\n\nexport function parseTriggers(triggers: string, aliases = DEFAULT_ALIASES): Trigger[] {\n  const trimmedTriggers = (triggers || '').trim();\n\n  if (trimmedTriggers.length === 0) {\n    return [];\n  }\n\n  const parsedTriggers = trimmedTriggers.split(/\\s+/).map(trigger => trigger.split(':')).map((triggerPair) => {\n    let alias = aliases[triggerPair[0]] || triggerPair;\n    return new Trigger(alias[0], alias[1]);\n  });\n\n  const manualTriggers = parsedTriggers.filter(triggerPair => triggerPair.isManual());\n\n  if (manualTriggers.length > 1) {\n    throw 'Triggers parse error: only one manual trigger is allowed';\n  }\n\n  if (manualTriggers.length === 1 && parsedTriggers.length > 1) {\n    throw 'Triggers parse error: manual trigger can\\'t be mixed with other triggers';\n  }\n\n  return parsedTriggers;\n}\n\nexport function observeTriggers(\n    renderer: Renderer2, nativeElement: HTMLElement, triggers: Trigger[], isOpenedFn: () => boolean) {\n  return new Observable<boolean>(subscriber => {\n    const listeners: Function[] = [];\n    const openFn = () => subscriber.next(true);\n    const closeFn = () => subscriber.next(false);\n    const toggleFn = () => subscriber.next(!isOpenedFn());\n\n    triggers.forEach((trigger: Trigger) => {\n      if (trigger.open === trigger.close) {\n        listeners.push(renderer.listen(nativeElement, trigger.open, toggleFn));\n      } else {\n        listeners.push(\n            renderer.listen(nativeElement, trigger.open, openFn),\n            renderer.listen(nativeElement, trigger.close !, closeFn));\n      }\n    });\n\n    return () => { listeners.forEach(unsubscribeFn => unsubscribeFn()); };\n  });\n}\n\nconst delayOrNoop = <T>(time: number) => time > 0 ? delay<T>(time) : (a: Observable<T>) => a;\n\nexport function triggerDelay(openDelay: number, closeDelay: number, isOpenedFn: () => boolean) {\n  return (input$: Observable<boolean>) => {\n    let pending: {open: boolean} | null = null;\n    const filteredInput$ = input$.pipe(\n        map(open => ({open})), filter(event => {\n          const currentlyOpen = isOpenedFn();\n          if (currentlyOpen !== event.open && (!pending || pending.open === currentlyOpen)) {\n            pending = event;\n            return true;\n          }\n          if (pending && pending.open !== event.open) {\n            pending = null;\n          }\n          return false;\n        }),\n        share());\n    const delayedOpen$ = filteredInput$.pipe(filter(event => event.open), delayOrNoop(openDelay));\n    const delayedClose$ = filteredInput$.pipe(filter(event => !event.open), delayOrNoop(closeDelay));\n    return merge(delayedOpen$, delayedClose$)\n        .pipe(\n            filter(event => {\n              if (event === pending) {\n                pending = null;\n                return event.open !== isOpenedFn();\n              }\n              return false;\n            }),\n            map(event => event.open));\n  };\n}\n\nexport function listenToTriggers(\n    renderer: Renderer2, nativeElement: HTMLElement, triggers: string, isOpenedFn: () => boolean, openFn: Function,\n    closeFn: Function, openDelay = 0, closeDelay = 0) {\n  const parsedTriggers = parseTriggers(triggers);\n\n  if (parsedTriggers.length === 1 && parsedTriggers[0].isManual()) {\n    return () => {};\n  }\n\n  const subscription = observeTriggers(renderer, nativeElement, parsedTriggers, isOpenedFn)\n                           .pipe(triggerDelay(openDelay, closeDelay, isOpenedFn))\n                           .subscribe(open => (open ? openFn() : closeFn()));\n\n  return () => subscription.unsubscribe();\n}\n"]}