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const ZOOM_SETTINGS = [
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,
] as const;
export default interface ZoomPresenter {
zoomIn(): Promise<void>;
zoomOut(): Promise<void>;
resetZoom(): Promise<void>;
}
export class ZoomPresenterImpl implements ZoomPresenter {
async zoomIn(): Promise<void> {
const tab = await browser.tabs.query({
active: true,
currentWindow: true,
});
const tabId = tab[0].id as number;
const current = await browser.tabs.getZoom(tabId);
const factor = ZOOM_SETTINGS.find((f) => f > current);
if (factor) {
return browser.tabs.setZoom(tabId, factor);
}
}
async zoomOut(): Promise<void> {
const tab = await browser.tabs.query({
active: true,
currentWindow: true,
});
const tabId = tab[0].id as number;
const current = await browser.tabs.getZoom(tabId);
const factor = ZOOM_SETTINGS.slice(0)
.reverse()
.find((f) => f < current);
if (factor) {
return browser.tabs.setZoom(tabId, factor);
}
}
async resetZoom(): Promise<void> {
const tab = await browser.tabs.query({
active: true,
currentWindow: true,
});
return browser.tabs.setZoom(tab[0].id, 1);
}
}
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