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import { inject, injectable } from "tsyringe";
import TabPresenter from "../presenters/TabPresenter";
const ZOOM_SETTINGS: number[] = [
0.33,
0.5,
0.66,
0.75,
0.8,
0.9,
1.0,
1.1,
1.25,
1.5,
1.75,
2.0,
2.5,
3.0,
];
@injectable()
export default class ZoomUseCase {
constructor(@inject("TabPresenter") private tabPresenter: TabPresenter) {}
async zoomIn(): Promise<any> {
const tab = await this.tabPresenter.getCurrent();
const tabId = tab.id as number;
const current = await this.tabPresenter.getZoom(tabId);
const factor = ZOOM_SETTINGS.find((f) => f > current);
if (factor) {
return this.tabPresenter.setZoom(tabId as number, factor);
}
}
async zoomOut(): Promise<any> {
const tab = await this.tabPresenter.getCurrent();
const tabId = tab.id as number;
const current = await this.tabPresenter.getZoom(tabId);
const factor = ZOOM_SETTINGS.slice(0)
.reverse()
.find((f) => f < current);
if (factor) {
return this.tabPresenter.setZoom(tabId as number, factor);
}
}
async zoomNutoral(): Promise<any> {
const tab = await this.tabPresenter.getCurrent();
return this.tabPresenter.setZoom(tab.id as number, 1);
}
}
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