From 22fa31ed561ed1e78bf3651f28e11882b1eac51f Mon Sep 17 00:00:00 2001
From: Povilas Kanapickas <povilas@radix.lt>
Date: Sun, 30 May 2021 13:26:30 +0300
Subject: [PATCH] dix: Add new internal event enums for gesture events

---
 Xi/exevents.c          | 44 +++++++++++++++++++++++++++++++
 dix/eventconvert.c     | 60 ++++++++++++++++++++++++++++++++++++++++++
 include/dix.h          |  7 +++++
 include/eventconvert.h |  3 +++
 include/eventstr.h     |  6 +++++
 5 files changed, 120 insertions(+)

diff --git a/Xi/exevents.c b/Xi/exevents.c
index dd3e90ae5..c8751ce18 100644
--- a/Xi/exevents.c
+++ b/Xi/exevents.c
@@ -95,6 +95,7 @@ SOFTWARE.
 #include "exevents.h"
 #include "extnsionst.h"
 #include "exglobals.h"
+#include "eventstr.h"
 #include "dixevents.h"          /* DeliverFocusedEvent */
 #include "dixgrabs.h"           /* CreateGrab() */
 #include "scrnintstr.h"
@@ -168,6 +169,49 @@ IsTouchEvent(InternalEvent *event)
     return FALSE;
 }
 
+Bool
+IsGestureEvent(InternalEvent *event)
+{
+    switch (event->any.type) {
+    case ET_GesturePinchBegin:
+    case ET_GesturePinchUpdate:
+    case ET_GesturePinchEnd:
+    case ET_GestureSwipeBegin:
+    case ET_GestureSwipeUpdate:
+    case ET_GestureSwipeEnd:
+        return TRUE;
+    default:
+        break;
+    }
+    return FALSE;
+}
+
+Bool
+IsGestureBeginEvent(InternalEvent *event)
+{
+    switch (event->any.type) {
+    case ET_GesturePinchBegin:
+    case ET_GestureSwipeBegin:
+        return TRUE;
+    default:
+        break;
+    }
+    return FALSE;
+}
+
+Bool
+IsGestureEndEvent(InternalEvent *event)
+{
+    switch (event->any.type) {
+    case ET_GesturePinchEnd:
+    case ET_GestureSwipeEnd:
+        return TRUE;
+    default:
+        break;
+    }
+    return FALSE;
+}
+
 /**
  * @return the device matching the deviceid of the device set in the event, or
  * NULL if the event is not an XInput event.
diff --git a/dix/eventconvert.c b/dix/eventconvert.c
index 4a07b6b6f..9bba2c7c5 100644
--- a/dix/eventconvert.c
+++ b/dix/eventconvert.c
@@ -969,8 +969,68 @@ GetXI2Type(enum EventType type)
     case ET_BarrierLeave:
         xi2type = XI_BarrierLeave;
         break;
+    case ET_GesturePinchBegin:
+        xi2type = XI_GesturePinchBegin;
+        break;
+    case ET_GesturePinchUpdate:
+        xi2type = XI_GesturePinchUpdate;
+        break;
+    case ET_GesturePinchEnd:
+        xi2type = XI_GesturePinchEnd;
+        break;
+    case ET_GestureSwipeBegin:
+        xi2type = XI_GestureSwipeBegin;
+        break;
+    case ET_GestureSwipeUpdate:
+        xi2type = XI_GestureSwipeUpdate;
+        break;
+    case ET_GestureSwipeEnd:
+        xi2type = XI_GestureSwipeEnd;
+        break;
     default:
         break;
     }
     return xi2type;
 }
+
+/**
+ * Converts a gesture type to corresponding Gesture{Pinch,Swipe}Begin.
+ * Returns 0 if the input type is not a gesture.
+ */
+enum EventType
+GestureTypeToBegin(enum EventType type)
+{
+    switch (type) {
+    case ET_GesturePinchBegin:
+    case ET_GesturePinchUpdate:
+    case ET_GesturePinchEnd:
+        return ET_GesturePinchBegin;
+    case ET_GestureSwipeBegin:
+    case ET_GestureSwipeUpdate:
+    case ET_GestureSwipeEnd:
+        return ET_GestureSwipeBegin;
+    default:
+        return 0;
+    }
+}
+
+/**
+ * Converts a gesture type to corresponding Gesture{Pinch,Swipe}End.
+ * Returns 0 if the input type is not a gesture.
+ */
+enum EventType
+GestureTypeToEnd(enum EventType type)
+{
+    switch (type) {
+    case ET_GesturePinchBegin:
+    case ET_GesturePinchUpdate:
+    case ET_GesturePinchEnd:
+        return ET_GesturePinchEnd;
+    case ET_GestureSwipeBegin:
+    case ET_GestureSwipeUpdate:
+    case ET_GestureSwipeEnd:
+        return ET_GestureSwipeEnd;
+    default:
+        return 0;
+    }
+}
diff --git a/include/dix.h b/include/dix.h
index ece8b6f76..07d3607f2 100644
--- a/include/dix.h
+++ b/include/dix.h
@@ -610,6 +610,13 @@ extern Bool
 IsPointerEvent(InternalEvent *event);
 extern Bool
 IsTouchEvent(InternalEvent *event);
+Bool
+IsGestureEvent(InternalEvent *event);
+Bool
+IsGestureBeginEvent(InternalEvent *event);
+Bool
+IsGestureEndEvent(InternalEvent *event);
+
 extern _X_EXPORT Bool
 IsMaster(DeviceIntPtr dev);
 extern _X_EXPORT Bool
diff --git a/include/eventconvert.h b/include/eventconvert.h
index 01172f0ee..cf425f7a9 100644
--- a/include/eventconvert.h
+++ b/include/eventconvert.h
@@ -36,4 +36,7 @@ _X_INTERNAL int GetCoreType(enum EventType type);
 _X_INTERNAL int GetXIType(enum EventType type);
 _X_INTERNAL int GetXI2Type(enum EventType type);
 
+_X_INTERNAL enum EventType GestureTypeToBegin(enum EventType type);
+_X_INTERNAL enum EventType GestureTypeToEnd(enum EventType type);
+
 #endif                          /* _EVENTCONVERT_H_ */
diff --git a/include/eventstr.h b/include/eventstr.h
index bf3b95fe4..16df595d6 100644
--- a/include/eventstr.h
+++ b/include/eventstr.h
@@ -75,6 +75,12 @@ enum EventType {
     ET_XQuartz,
     ET_BarrierHit,
     ET_BarrierLeave,
+    ET_GesturePinchBegin,
+    ET_GesturePinchUpdate,
+    ET_GesturePinchEnd,
+    ET_GestureSwipeBegin,
+    ET_GestureSwipeUpdate,
+    ET_GestureSwipeEnd,
     ET_Internal = 0xFF          /* First byte */
 };