From 5df590f1721f29a9d8c356b79b8a84af006dae07 Mon Sep 17 00:00:00 2001
From: Rico Tiongson <thericotiongson@gmail.com>
Date: Thu, 7 Feb 2019 03:39:27 +0800
Subject: [PATCH] Add a flag for gesture begin to ignore unneeded update/end

---
 src/comfortable-swipe.cpp | 49 +++++++++++++++++++++------------------
 1 file changed, 27 insertions(+), 22 deletions(-)

diff --git a/src/comfortable-swipe.cpp b/src/comfortable-swipe.cpp
index f665ba8..25afc4b 100644
--- a/src/comfortable-swipe.cpp
+++ b/src/comfortable-swipe.cpp
@@ -231,31 +231,36 @@ namespace service {
         );
         // start reading lines from input one by one
         static string sentence;
+        bool flag_begin = false;
         while (getline(cin, sentence)) {
             auto data = sentence.data();
             cmatch matches;
-            if (regex_match(data, matches, gesture_begin)) {
-               swipe.device = matches[1];
-               swipe.stamp = matches[2];
-               swipe.fingers = matches[3];
-               swipe.on_begin();
-            }
-            else if (regex_match(data, matches, gesture_end)) {
-               swipe.device = matches[1];
-               swipe.stamp = matches[2];
-               swipe.fingers = matches[3];
-               swipe.on_end();
-            }
-            else if (regex_match(data, matches, gesture_update)) {
-               swipe.device = matches[1];
-               swipe.stamp = matches[2];
-               swipe.fingers = matches[3];
-               swipe.dx = matches[4];
-               swipe.dy = matches[5];
-               swipe.udx = matches[6];
-               swipe.udy = matches[7];
-               swipe.on_update();
-            }
+            if (!flag_begin) {
+                if (regex_match(data, matches, gesture_begin)) {
+                    swipe.device = matches[1];
+                    swipe.stamp = matches[2];
+                    swipe.fingers = matches[3];
+                    swipe.on_begin();
+                    flag_begin = true;
+                }
+            } else {
+                if (regex_match(data, matches, gesture_update)) {
+                    swipe.device = matches[1];
+                    swipe.stamp = matches[2];
+                    swipe.fingers = matches[3];
+                    swipe.dx = matches[4];
+                    swipe.dy = matches[5];
+                    swipe.udx = matches[6];
+                    swipe.udy = matches[7];
+                    swipe.on_update();
+                } else if (regex_match(data, matches, gesture_end)) {
+                    swipe.device = matches[1];
+                    swipe.stamp = matches[2];
+                    swipe.fingers = matches[3];
+                    swipe.on_end();
+                    flag_begin = false;
+                }
+            } 
         }
     }
     // starts service