From d83698bdd21d39d7920dc3c27717b95256408156 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Thu, 26 Sep 2019 06:36:51 +0530
Subject: [PATCH] Viewer: Allow using ctrl+wheel to change font size

---
 src/pyj/read_book/iframe.pyj | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/pyj/read_book/iframe.pyj b/src/pyj/read_book/iframe.pyj
index 691941312c..427a59133c 100644
--- a/src/pyj/read_book/iframe.pyj
+++ b/src/pyj/read_book/iframe.pyj
@@ -380,7 +380,10 @@ class IframeBoss:
     def onwheel(self, evt):
         if self.content_ready:
             evt.preventDefault()
-            self.handle_wheel(evt)
+            if evt.deltaY and evt.ctrlKey and not evt.shiftKey and not evt.altKey and not evt.metaKey:
+                self.send_message('handle_shortcut', name='increase_font_size' if evt.deltaY < 0 else 'decrease_font_size')
+            else:
+                self.handle_wheel(evt)
 
     def onkeydown(self, evt):
         if current_layout_mode() is not 'flow' and evt.key is 'Tab':