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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
];
export default class ZoomUseCase {
private tabPresenter: TabPresenter;
constructor() {
this.tabPresenter = new TabPresenter();
}
async zoomIn(): Promise<any> {
let tab = await this.tabPresenter.getCurrent();
let tabId = tab.id as number;
let current = await this.tabPresenter.getZoom(tabId);
let factor = ZOOM_SETTINGS.find(f => f > current);
if (factor) {
return this.tabPresenter.setZoom(tabId as number, factor);
}
}
async zoomOut(): Promise<any> {
let tab = await this.tabPresenter.getCurrent();
let tabId = tab.id as number;
let current = await this.tabPresenter.getZoom(tabId);
let factor = ZOOM_SETTINGS.slice(0).reverse().find(f => f < current);
if (factor) {
return this.tabPresenter.setZoom(tabId as number, factor);
}
}
async zoomNutoral(): Promise<any> {
let tab = await this.tabPresenter.getCurrent();
return this.tabPresenter.setZoom(tab.id as number, 1);
}
}
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