Divide InputDispatcher into several files.

This CL does:
1) Isolate implementation details of InputDispatcher from outside and
only expose necessary header files;
2) Move implementation details into android::inputdispatcher namespace;
3) Make input dispatcher a static library for inputflinger to link
against;
4) Add InputDispatcherFactory.{h,cpp} to isolate implementation details
in InputDispatcher.h from InputManager.

Bug: 140139676
Test: Touches on touchscreen can be dispatched to right windows.
Change-Id: Ib61c16fd41f3f76f538a3de9b54f31ac304e03a5

1 files changed, 258 insertions, 0 deletions

diff --git a/services/inputflinger/dispatcher/Entry.cpp b/services/inputflinger/dispatcher/Entry.cpp
new file mode 100644
index 0000000000..640a69a2ec
--- /dev/null
+++ b/services/inputflinger/dispatcher/Entry.cpp
@@ -0,0 +1,258 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "Entry.h"
+
+#include "Connection.h"
+
+#include <android-base/stringprintf.h>
+#include <cutils/atomic.h>
+#include <inttypes.h>
+
+using android::base::StringPrintf;
+
+namespace android::inputdispatcher {
+
+static std::string motionActionToString(int32_t action) {
+    // Convert MotionEvent action to string
+    switch (action & AMOTION_EVENT_ACTION_MASK) {
+        case AMOTION_EVENT_ACTION_DOWN:
+            return "DOWN";
+        case AMOTION_EVENT_ACTION_MOVE:
+            return "MOVE";
+        case AMOTION_EVENT_ACTION_UP:
+            return "UP";
+        case AMOTION_EVENT_ACTION_POINTER_DOWN:
+            return "POINTER_DOWN";
+        case AMOTION_EVENT_ACTION_POINTER_UP:
+            return "POINTER_UP";
+    }
+    return StringPrintf("%" PRId32, action);
+}
+
+static std::string keyActionToString(int32_t action) {
+    // Convert KeyEvent action to string
+    switch (action) {
+        case AKEY_EVENT_ACTION_DOWN:
+            return "DOWN";
+        case AKEY_EVENT_ACTION_UP:
+            return "UP";
+        case AKEY_EVENT_ACTION_MULTIPLE:
+            return "MULTIPLE";
+    }
+    return StringPrintf("%" PRId32, action);
+}
+
+// --- EventEntry ---
+
+EventEntry::EventEntry(uint32_t sequenceNum, int32_t type, nsecs_t eventTime, uint32_t policyFlags)
+      : sequenceNum(sequenceNum),
+        refCount(1),
+        type(type),
+        eventTime(eventTime),
+        policyFlags(policyFlags),
+        injectionState(nullptr),
+        dispatchInProgress(false) {}
+
+EventEntry::~EventEntry() {
+    releaseInjectionState();
+}
+
+void EventEntry::release() {
+    refCount -= 1;
+    if (refCount == 0) {
+        delete this;
+    } else {
+        ALOG_ASSERT(refCount > 0);
+    }
+}
+
+void EventEntry::releaseInjectionState() {
+    if (injectionState) {
+        injectionState->release();
+        injectionState = nullptr;
+    }
+}
+
+// --- ConfigurationChangedEntry ---
+
+ConfigurationChangedEntry::ConfigurationChangedEntry(uint32_t sequenceNum, nsecs_t eventTime)
+      : EventEntry(sequenceNum, TYPE_CONFIGURATION_CHANGED, eventTime, 0) {}
+
+ConfigurationChangedEntry::~ConfigurationChangedEntry() {}
+
+void ConfigurationChangedEntry::appendDescription(std::string& msg) const {
+    msg += StringPrintf("ConfigurationChangedEvent(), policyFlags=0x%08x", policyFlags);
+}
+
+// --- DeviceResetEntry ---
+
+DeviceResetEntry::DeviceResetEntry(uint32_t sequenceNum, nsecs_t eventTime, int32_t deviceId)
+      : EventEntry(sequenceNum, TYPE_DEVICE_RESET, eventTime, 0), deviceId(deviceId) {}
+
+DeviceResetEntry::~DeviceResetEntry() {}
+
+void DeviceResetEntry::appendDescription(std::string& msg) const {
+    msg += StringPrintf("DeviceResetEvent(deviceId=%d), policyFlags=0x%08x", deviceId, policyFlags);
+}
+
+// --- KeyEntry ---
+
+KeyEntry::KeyEntry(uint32_t sequenceNum, nsecs_t eventTime, int32_t deviceId, uint32_t source,
+                   int32_t displayId, uint32_t policyFlags, int32_t action, int32_t flags,
+                   int32_t keyCode, int32_t scanCode, int32_t metaState, int32_t repeatCount,
+                   nsecs_t downTime)
+      : EventEntry(sequenceNum, TYPE_KEY, eventTime, policyFlags),
+        deviceId(deviceId),
+        source(source),
+        displayId(displayId),
+        action(action),
+        flags(flags),
+        keyCode(keyCode),
+        scanCode(scanCode),
+        metaState(metaState),
+        repeatCount(repeatCount),
+        downTime(downTime),
+        syntheticRepeat(false),
+        interceptKeyResult(KeyEntry::INTERCEPT_KEY_RESULT_UNKNOWN),
+        interceptKeyWakeupTime(0) {}
+
+KeyEntry::~KeyEntry() {}
+
+void KeyEntry::appendDescription(std::string& msg) const {
+    msg += StringPrintf("KeyEvent(deviceId=%d, source=0x%08x, displayId=%" PRId32 ", action=%s, "
+                        "flags=0x%08x, keyCode=%d, scanCode=%d, metaState=0x%08x, "
+                        "repeatCount=%d), policyFlags=0x%08x",
+                        deviceId, source, displayId, keyActionToString(action).c_str(), flags,
+                        keyCode, scanCode, metaState, repeatCount, policyFlags);
+}
+
+void KeyEntry::recycle() {
+    releaseInjectionState();
+
+    dispatchInProgress = false;
+    syntheticRepeat = false;
+    interceptKeyResult = KeyEntry::INTERCEPT_KEY_RESULT_UNKNOWN;
+    interceptKeyWakeupTime = 0;
+}
+
+// --- MotionEntry ---
+
+MotionEntry::MotionEntry(uint32_t sequenceNum, nsecs_t eventTime, int32_t deviceId, uint32_t source,
+                         int32_t displayId, uint32_t policyFlags, int32_t action,
+                         int32_t actionButton, int32_t flags, int32_t metaState,
+                         int32_t buttonState, MotionClassification classification,
+                         int32_t edgeFlags, float xPrecision, float yPrecision,
+                         float xCursorPosition, float yCursorPosition, nsecs_t downTime,
+                         uint32_t pointerCount, const PointerProperties* pointerProperties,
+                         const PointerCoords* pointerCoords, float xOffset, float yOffset)
+      : EventEntry(sequenceNum, TYPE_MOTION, eventTime, policyFlags),
+        eventTime(eventTime),
+        deviceId(deviceId),
+        source(source),
+        displayId(displayId),
+        action(action),
+        actionButton(actionButton),
+        flags(flags),
+        metaState(metaState),
+        buttonState(buttonState),
+        classification(classification),
+        edgeFlags(edgeFlags),
+        xPrecision(xPrecision),
+        yPrecision(yPrecision),
+        xCursorPosition(xCursorPosition),
+        yCursorPosition(yCursorPosition),
+        downTime(downTime),
+        pointerCount(pointerCount) {
+    for (uint32_t i = 0; i < pointerCount; i++) {
+        this->pointerProperties[i].copyFrom(pointerProperties[i]);
+        this->pointerCoords[i].copyFrom(pointerCoords[i]);
+        if (xOffset || yOffset) {
+            this->pointerCoords[i].applyOffset(xOffset, yOffset);
+        }
+    }
+}
+
+MotionEntry::~MotionEntry() {}
+
+void MotionEntry::appendDescription(std::string& msg) const {
+    msg += StringPrintf("MotionEvent(deviceId=%d, source=0x%08x, displayId=%" PRId32
+                        ", action=%s, actionButton=0x%08x, flags=0x%08x, metaState=0x%08x, "
+                        "buttonState=0x%08x, "
+                        "classification=%s, edgeFlags=0x%08x, xPrecision=%.1f, yPrecision=%.1f, "
+                        "xCursorPosition=%0.1f, yCursorPosition=%0.1f, pointers=[",
+                        deviceId, source, displayId, motionActionToString(action).c_str(),
+                        actionButton, flags, metaState, buttonState,
+                        motionClassificationToString(classification), edgeFlags, xPrecision,
+                        yPrecision, xCursorPosition, yCursorPosition);
+
+    for (uint32_t i = 0; i < pointerCount; i++) {
+        if (i) {
+            msg += ", ";
+        }
+        msg += StringPrintf("%d: (%.1f, %.1f)", pointerProperties[i].id, pointerCoords[i].getX(),
+                            pointerCoords[i].getY());
+    }
+    msg += StringPrintf("]), policyFlags=0x%08x", policyFlags);
+}
+
+// --- DispatchEntry ---
+
+volatile int32_t DispatchEntry::sNextSeqAtomic;
+
+DispatchEntry::DispatchEntry(EventEntry* eventEntry, int32_t targetFlags, float xOffset,
+                             float yOffset, float globalScaleFactor, float windowXScale,
+                             float windowYScale)
+      : seq(nextSeq()),
+        eventEntry(eventEntry),
+        targetFlags(targetFlags),
+        xOffset(xOffset),
+        yOffset(yOffset),
+        globalScaleFactor(globalScaleFactor),
+        windowXScale(windowXScale),
+        windowYScale(windowYScale),
+        deliveryTime(0),
+        resolvedAction(0),
+        resolvedFlags(0) {
+    eventEntry->refCount += 1;
+}
+
+DispatchEntry::~DispatchEntry() {
+    eventEntry->release();
+}
+
+uint32_t DispatchEntry::nextSeq() {
+    // Sequence number 0 is reserved and will never be returned.
+    uint32_t seq;
+    do {
+        seq = android_atomic_inc(&sNextSeqAtomic);
+    } while (!seq);
+    return seq;
+}
+
+// --- CommandEntry ---
+
+CommandEntry::CommandEntry(Command command)
+      : command(command),
+        eventTime(0),
+        keyEntry(nullptr),
+        userActivityEventType(0),
+        seq(0),
+        handled(false) {}
+
+CommandEntry::~CommandEntry() {}
+
+} // namespace android::inputdispatcher