TouchEvent (1/n): Adding TouchModeEvent to InputChannel
This CL detaches the touch mode state update from focus update. It does
that by introducing a new internal event (TouchModeEvent). This CL also
adds this event to InputChannel and related processing logic to
InputPublisher and InputConsumer. InputDispatcher will process two
different events now: FocusEvent when gaining/losing focus and
TouchModeEvent when entering/leaving touch mode.
Test: atest libinput_tests
Bug: 193718270
Change-Id: Ie4e5b6e8e798f12d7203127b4559fa40d38788de
diff --git a/include/input/Input.h b/include/input/Input.h
index b09ff48..a7d34e2 100644
--- a/include/input/Input.h
+++ b/include/input/Input.h
@@ -883,6 +883,25 @@
float mX, mY;
};
+/*
+ * Touch mode events.
+ */
+class TouchModeEvent : public InputEvent {
+public:
+ virtual ~TouchModeEvent() {}
+
+ virtual int32_t getType() const override { return AINPUT_EVENT_TYPE_TOUCH_MODE; }
+
+ inline bool isInTouchMode() const { return mIsInTouchMode; }
+
+ void initialize(int32_t id, bool isInTouchMode);
+
+ void initialize(const TouchModeEvent& from);
+
+protected:
+ bool mIsInTouchMode;
+};
+
/**
* Base class for verified events.
* Do not create a VerifiedInputEvent explicitly.
@@ -947,6 +966,7 @@
virtual FocusEvent* createFocusEvent() = 0;
virtual CaptureEvent* createCaptureEvent() = 0;
virtual DragEvent* createDragEvent() = 0;
+ virtual TouchModeEvent* createTouchModeEvent() = 0;
};
/*
@@ -963,6 +983,7 @@
virtual FocusEvent* createFocusEvent() override { return &mFocusEvent; }
virtual CaptureEvent* createCaptureEvent() override { return &mCaptureEvent; }
virtual DragEvent* createDragEvent() override { return &mDragEvent; }
+ virtual TouchModeEvent* createTouchModeEvent() override { return &mTouchModeEvent; }
private:
KeyEvent mKeyEvent;
@@ -970,6 +991,7 @@
FocusEvent mFocusEvent;
CaptureEvent mCaptureEvent;
DragEvent mDragEvent;
+ TouchModeEvent mTouchModeEvent;
};
/*
@@ -985,6 +1007,7 @@
virtual FocusEvent* createFocusEvent() override;
virtual CaptureEvent* createCaptureEvent() override;
virtual DragEvent* createDragEvent() override;
+ virtual TouchModeEvent* createTouchModeEvent() override;
void recycle(InputEvent* event);
@@ -996,6 +1019,7 @@
std::queue<std::unique_ptr<FocusEvent>> mFocusEventPool;
std::queue<std::unique_ptr<CaptureEvent>> mCaptureEventPool;
std::queue<std::unique_ptr<DragEvent>> mDragEventPool;
+ std::queue<std::unique_ptr<TouchModeEvent>> mTouchModeEventPool;
};
} // namespace android
diff --git a/include/input/InputTransport.h b/include/input/InputTransport.h
index 360dfbf..62cf67e 100644
--- a/include/input/InputTransport.h
+++ b/include/input/InputTransport.h
@@ -72,6 +72,7 @@
CAPTURE,
DRAG,
TIMELINE,
+ TOUCH_MODE,
};
struct Header {
@@ -206,6 +207,15 @@
inline size_t size() const { return sizeof(Timeline); }
} timeline;
+
+ struct TouchMode {
+ int32_t eventId;
+ // The following 2 fields take up 4 bytes total
+ bool isInTouchMode;
+ uint8_t empty[3];
+
+ inline size_t size() const { return sizeof(TouchMode); }
+ } touchMode;
} __attribute__((aligned(8))) body;
bool isValid(size_t actualSize) const;
@@ -387,6 +397,15 @@
*/
status_t publishDragEvent(uint32_t seq, int32_t eventId, float x, float y, bool isExiting);
+ /* Publishes a touch mode event to the input channel.
+ *
+ * Returns OK on success.
+ * Returns WOULD_BLOCK if the channel is full.
+ * Returns DEAD_OBJECT if the channel's peer has been closed.
+ * Other errors probably indicate that the channel is broken.
+ */
+ status_t publishTouchModeEvent(uint32_t seq, int32_t eventId, bool isInTouchMode);
+
struct Finished {
uint32_t seq;
bool handled;
@@ -657,6 +676,7 @@
static void initializeFocusEvent(FocusEvent* event, const InputMessage* msg);
static void initializeCaptureEvent(CaptureEvent* event, const InputMessage* msg);
static void initializeDragEvent(DragEvent* event, const InputMessage* msg);
+ static void initializeTouchModeEvent(TouchModeEvent* event, const InputMessage* msg);
static void addSample(MotionEvent* event, const InputMessage* msg);
static bool canAddSample(const Batch& batch, const InputMessage* msg);
static ssize_t findSampleNoLaterThan(const Batch& batch, nsecs_t time);