dees-domtools/ts/domtools.classes.thememanager.ts
2020-11-30 20:03:05 +00:00

55 lines
1.8 KiB
TypeScript

import { LitElement } from 'lit-element';
import { DomTools } from './domtools.classes.domtools';
import * as plugins from './domtools.plugins';
export class ThemeManager {
public domtoolsRef: DomTools;
public goBrightBoolean = false;
public preferredColorSchemeMediaMatch = window.matchMedia('(prefers-color-scheme: light)');
constructor(domtoolsRefArg: DomTools) {
this.domtoolsRef = domtoolsRefArg;
// lets take care of elements being added that need to know of the current theme
this.domtoolsRef.elementInstrumenter.connectedElements.eventSubject.subscribe(async eventData => {
await this.setThemeStatusForElement(eventData.payload, this.goBrightBoolean);
});
// lets care
this.goBrightBoolean = this.preferredColorSchemeMediaMatch.matches;
this.preferredColorSchemeMediaMatch.addEventListener('change', eventArg => {
this.goBrightBoolean = eventArg.matches;
this.updateAllConnectedElements();
});
}
private async setThemeStatusForElement (elementArg: LitElement, goBrightBool: boolean) {
const goBright = (elementArg as any).goBright;
if (typeof goBright === 'boolean') {
(elementArg as any).goBright = goBrightBool;
}
}
private async updateAllConnectedElements() {
document.body.style.background = this.goBrightBoolean ? '#fff' : '#000';
this.domtoolsRef.elementInstrumenter.forEachelement(async elementArg => {
await this.setThemeStatusForElement(elementArg, this.goBrightBoolean);
});
}
public goBright() {
this.goBrightBoolean = true;
this.updateAllConnectedElements();
}
public goDark() {
this.goBrightBoolean = false;
this.updateAllConnectedElements();
}
public toggleDarkBright() {
this.goBrightBoolean = !this.goBrightBoolean;
this.updateAllConnectedElements();
}
}