Own handler for links.

All external links (not belonging to mail.yandex.ru domain) should
open in external browser now. Related to #3.

main.js

@@ -36,7 +36,6 @@ function createWindow() {
 
     //mainWindow.webContents.openDevTools();
     mainWindow.loadURL('https://mail.yandex.ru/');
-    //mainWindow.loadFile(path.join(__dirname, "index.html"));
     mainWindow.on('closed', function () {
         mainWindow = null;
     })

renderer.js

@@ -1,8 +1,12 @@
-console.log(window);
-var ipc = require("electron").ipcRenderer;
+// This file is loaded by Chromium engine and executes in browser.
 
+console.log(window);
+const ipc = require('electron').ipcRenderer;
+const { shell } = require('electron')
+
+// Unread mails check.
 function checkForUnreads() {
-    unread = parseInt(document.title.split(" ")[0]);
+    unread = parseInt(document.title.split(' ')[0]);
     if (typeof (unread) != NaN && unread > 0) {
         ipc.send('has-unread', unread);
     } else {
@@ -10,4 +14,35 @@ function checkForUnreads() {
     };
 }
 
-setInterval(checkForUnreads, 1000);
+setInterval(checkForUnreads, 1000);
+
+// Handle all clicks on links.
+function clickHandler(event) {
+    console.log(event);
+
+    // We should check not only specified element, but also all other
+    // parent elements until we found a.daria-goto-anchor.
+    var linkFound = false;
+    var link = "";
+    if (!event.target.hasOwnProperty('href')) {
+        for (var i = 0; i < event.path.length; i++) {
+            if (event.path[i].tagName == 'A' && (event.path[i].className.indexOf('daria-goto-anchor') !== -1 || event.path[i].className.indexOf('mail-ui-IconList-Item') !== -1 && event.path[i].hostname != "mail.yandex.ru")) {
+                linkFound = true;
+                link = event.path[i].href;
+                break;
+            }
+        }
+    } else {
+        linkFound = true;
+        link = event.target.href;
+    }
+
+    if (linkFound) {
+        event.preventDefault();
+        shell.openExternal(link);
+    } else {
+        console.log("No external link found, doing nothing");
+    }
+}
+
+document.addEventListener('click', clickHandler);