commit 7cdf8ef17636cdc5cc5fe41578951b4b1f23865c
author Antonio Kantek <kanant@google.com> Tue Jul 13 18:04:53 2021 -0700
committer Antonio Kantek <kanant@google.com> Wed Jul 14 17:48:48 2021 -0700
tree 56f026c7cbdb7efc01ba46ae526afdfb5d55eb31
parent 81fc73800743003c669f4d2bacdb9ab6408696eb

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

libs/input/InputTransport.cpp

diff --git a/libs/input/InputTransport.cpp b/libs/input/InputTransport.cpp
index d6c1161..595c9d9 100644
--- a/libs/input/InputTransport.cpp
+++ b/libs/input/InputTransport.cpp
@@ -116,6 +116,7 @@
         case Type::FOCUS:
         case Type::CAPTURE:
         case Type::DRAG:
+        case Type::TOUCH_MODE:
             return true;
         case Type::TIMELINE: {
             const nsecs_t gpuCompletedTime =
@@ -151,6 +152,8 @@
             return sizeof(Header) + body.drag.size();
         case Type::TIMELINE:
             return sizeof(Header) + body.timeline.size();
+        case Type::TOUCH_MODE:
+            return sizeof(Header) + body.touchMode.size();
     }
     return sizeof(Header);
 }
@@ -291,6 +294,10 @@
             msg->body.timeline.graphicsTimeline = body.timeline.graphicsTimeline;
             break;
         }
+        case InputMessage::Type::TOUCH_MODE: {
+            msg->body.touchMode.eventId = body.touchMode.eventId;
+            msg->body.touchMode.isInTouchMode = body.touchMode.isInTouchMode;
+        }
     }
 }
 
@@ -661,6 +668,22 @@
     return mChannel->sendMessage(&msg);
 }
 
+status_t InputPublisher::publishTouchModeEvent(uint32_t seq, int32_t eventId, bool isInTouchMode) {
+    if (ATRACE_ENABLED()) {
+        std::string message =
+                StringPrintf("publishTouchModeEvent(inputChannel=%s, isInTouchMode=%s)",
+                             mChannel->getName().c_str(), toString(isInTouchMode));
+        ATRACE_NAME(message.c_str());
+    }
+
+    InputMessage msg;
+    msg.header.type = InputMessage::Type::TOUCH_MODE;
+    msg.header.seq = seq;
+    msg.body.touchMode.eventId = eventId;
+    msg.body.touchMode.isInTouchMode = isInTouchMode;
+    return mChannel->sendMessage(&msg);
+}
+
 android::base::Result<InputPublisher::ConsumerResponse> InputPublisher::receiveConsumerResponse() {
     if (DEBUG_TRANSPORT_ACTIONS) {
         ALOGD("channel '%s' publisher ~ %s", mChannel->getName().c_str(), __func__);
@@ -862,6 +885,16 @@
                 *outEvent = dragEvent;
                 break;
             }
+
+            case InputMessage::Type::TOUCH_MODE: {
+                TouchModeEvent* touchModeEvent = factory->createTouchModeEvent();
+                if (!touchModeEvent) return NO_MEMORY;
+
+                initializeTouchModeEvent(touchModeEvent, &mMsg);
+                *outSeq = mMsg.header.seq;
+                *outEvent = touchModeEvent;
+                break;
+            }
         }
     }
     return OK;
@@ -1366,6 +1399,10 @@
                       pointerProperties, pointerCoords);
 }
 
+void InputConsumer::initializeTouchModeEvent(TouchModeEvent* event, const InputMessage* msg) {
+    event->initialize(msg->body.touchMode.eventId, msg->body.touchMode.isInTouchMode);
+}
+
 void InputConsumer::addSample(MotionEvent* event, const InputMessage* msg) {
     uint32_t pointerCount = msg->body.motion.pointerCount;
     PointerCoords pointerCoords[pointerCount];
@@ -1472,6 +1509,11 @@
                                                        presentTime);
                     break;
                 }
+                case InputMessage::Type::TOUCH_MODE: {
+                    out += android::base::StringPrintf("isInTouchMode=%s",
+                                                       toString(msg.body.touchMode.isInTouchMode));
+                    break;
+                }
             }
             out += "\n";
         }