commit 2ee257c73388df89b4f5966c882d8047a896f9b2
Author: Peng Wu <alexepico@gmail.com>
Date:   Fri Aug 28 11:30:31 2020 +0800

    restore mainSwitch shortcut key

diff --git a/src/PYPPinyinEngine.cc b/src/PYPPinyinEngine.cc
index dcd2e3f..295adc5 100644
--- a/src/PYPPinyinEngine.cc
+++ b/src/PYPPinyinEngine.cc
@@ -166,8 +166,10 @@ PinyinEngine::processAccelKeyEvent (guint keyval, guint keycode,
          * and no other key event between the press and release key event */
         gboolean triggered = FALSE;
 
-        if (PinyinConfig::instance ().mainSwitch () == accel) {
-            triggered = TRUE;
+        if (m_prev_pressed_key == keyval) {
+            if (PinyinConfig::instance ().mainSwitch () == accel) {
+                triggered = TRUE;
+            }
         }
 
         if (triggered) {