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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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