From 891ad34d886a73d990bf4dc2401fe25c8533809c Mon Sep 17 00:00:00 2001
From: Hajime Hoshi <hajimehoshi@gmail.com>
Date: Sun, 26 Jun 2016 15:33:14 +0900
Subject: [PATCH] mobile: UpdateTouchesOnIOS should take int64 ptrs

---
 mobile/mobile.go          |  2 +-
 mobile/touches_android.go |  2 +-
 mobile/touches_empty.go   |  2 +-
 mobile/touches_ios.go     | 26 +++++++++++++++++++++++---
 4 files changed, 26 insertions(+), 6 deletions(-)

diff --git a/mobile/mobile.go b/mobile/mobile.go
index dc02b37c9..1451b091d 100644
--- a/mobile/mobile.go
+++ b/mobile/mobile.go
@@ -54,6 +54,6 @@ func UpdateTouchesOnAndroid(action int, id int, x, y int) {
 	updateTouchesOnAndroid(action, id, x, y)
 }
 
-func UpdateTouchesOnIOS(phase int, ptr int, x, y int) {
+func UpdateTouchesOnIOS(phase int, ptr int64, x, y int) {
 	updateTouchesOnIOSImpl(phase, ptr, x, y)
 }
diff --git a/mobile/touches_android.go b/mobile/touches_android.go
index 68081d20c..e1a13f88b 100644
--- a/mobile/touches_android.go
+++ b/mobile/touches_android.go
@@ -25,6 +25,6 @@ func updateTouchesOnAndroid(action int, id int, x, y int) {
 	}
 }
 
-func updateTouchesOnIOSImpl(phase int, ptr int, x, y int) {
+func updateTouchesOnIOSImpl(phase int, ptr int64, x, y int) {
 	panic("not reach")
 }
diff --git a/mobile/touches_empty.go b/mobile/touches_empty.go
index f2af52c78..4b023c2f2 100644
--- a/mobile/touches_empty.go
+++ b/mobile/touches_empty.go
@@ -21,5 +21,5 @@ package mobile
 func updateTouchesOnAndroid(action int, id int, x, y int) {
 }
 
-func updateTouchesOnIOSImpl(phase int, ptr int, x, y int) {
+func updateTouchesOnIOSImpl(phase int, ptr int64, x, y int) {
 }
diff --git a/mobile/touches_ios.go b/mobile/touches_ios.go
index 17d50c0a7..d536ed516 100644
--- a/mobile/touches_ios.go
+++ b/mobile/touches_ios.go
@@ -22,17 +22,37 @@ package mobile
 // #import <UIKit/UIKit.h>
 import "C"
 
+var ptrToID = map[int64]int{}
+
+func getIDFromPtr(ptr int64) int {
+	if id, ok := ptrToID[ptr]; ok {
+		return id
+	}
+	maxID := 0
+	for _, id := range ptrToID {
+		if maxID > id {
+			maxID = id
+		}
+	}
+	id := maxID + 1
+	ptrToID[ptr] = id
+	return id
+}
+
 func updateTouchesOnAndroid(action int, id int, x, y int) {
 	panic("not reach")
 }
 
-func updateTouchesOnIOSImpl(phase int, ptr int, x, y int) {
+func updateTouchesOnIOSImpl(phase int, ptr int64, x, y int) {
 	switch phase {
 	case C.UITouchPhaseBegan, C.UITouchPhaseMoved, C.UITouchPhaseStationary:
-		touches[ptr] = position{x, y}
+		id := getIDFromPtr(ptr)
+		touches[id] = position{x, y}
 		updateTouches()
 	case C.UITouchPhaseEnded, C.UITouchPhaseCancelled:
-		delete(touches, ptr)
+		id := getIDFromPtr(ptr)
+		delete(ptrToID, ptr)
+		delete(touches, id)
 		updateTouches()
 	default:
 		panic("not reach")