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import { inject, injectable } from 'tsyringe';
import TabPresenter from '../presenters/TabPresenter';
const ZOOM_SETTINGS: number[] = [
0.33, 0.50, 0.66, 0.75, 0.80, 0.90, 1.00,
1.10, 1.25, 1.50, 1.75, 2.00, 2.50, 3.00
];
@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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