persisting zoom setting in electron, fixes #112

src/public/javascripts/services/zoom.js

@@ -0,0 +1,42 @@
+import server from "./server.js";
+import utils from "./utils.js";
+import optionsInitService from "./options_init.js";
+
+function decreaseZoomFactor() {
+    const webFrame = require('electron').webFrame;
+
+    if (webFrame.getZoomFactor() > 0.2) {
+        const webFrame = require('electron').webFrame;
+        const newZoomFactor = webFrame.getZoomFactor() - 0.1;
+
+        webFrame.setZoomFactor(newZoomFactor);
+
+        server.put('options/zoomFactor/' + newZoomFactor);
+    }
+}
+
+function increaseZoomFactor() {
+    const webFrame = require('electron').webFrame;
+    const newZoomFactor = webFrame.getZoomFactor() + 0.1;
+
+    webFrame.setZoomFactor(newZoomFactor);
+
+    server.put('options/zoomFactor/' + newZoomFactor);
+}
+
+function setZoomFactor(zoomFactor) {
+    zoomFactor = parseFloat(zoomFactor);
+
+    const webFrame = require('electron').webFrame;
+    webFrame.setZoomFactor(zoomFactor);
+}
+
+if (utils.isElectron()) {
+    optionsInitService.optionsReady.then(options => setZoomFactor(options.zoomFactor))
+}
+
+export default {
+    decreaseZoomFactor,
+    increaseZoomFactor,
+    setZoomFactor
+}