src/webview/zoom.js


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37

const electron = require('electron');

const { ipcRenderer, webFrame } = electron;

const maxZoomLevel = 9;
const minZoomLevel = -8;
let zoomLevel = 0;

ipcRenderer.on('zoomIn', () => {
  if (maxZoomLevel > zoomLevel) {
    zoomLevel += 1;
  }
  webFrame.setZoomLevel(zoomLevel);

  ipcRenderer.sendToHost('zoomLevel', { zoom: zoomLevel });
});

ipcRenderer.on('zoomOut', () => {
  if (minZoomLevel < zoomLevel) {
    zoomLevel -= 1;
  }
  webFrame.setZoomLevel(zoomLevel);

  ipcRenderer.sendToHost('zoomLevel', { zoom: zoomLevel });
});

ipcRenderer.on('zoomReset', () => {
  zoomLevel = 0;
  webFrame.setZoomLevel(zoomLevel);

  ipcRenderer.sendToHost('zoomLevel', { zoom: zoomLevel });
});

ipcRenderer.on('setZoom', (e, arg) => {
  zoomLevel = arg;
  webFrame.setZoomLevel(zoomLevel);
});