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, 53 insertions, 0 deletions

diff --git a/services/inputflinger/dispatcher/CancelationOptions.h b/services/inputflinger/dispatcher/CancelationOptions.h
new file mode 100644
index 0000000000..99e2108dbf
--- /dev/null
+++ b/services/inputflinger/dispatcher/CancelationOptions.h
@@ -0,0 +1,53 @@
+/*
+ * 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.
+ */
+
+#ifndef _UI_INPUT_INPUTDISPATCHER_CANCELLATIONOPTIONS_H
+#define _UI_INPUT_INPUTDISPATCHER_CANCELLATIONOPTIONS_H
+
+#include <optional>
+
+namespace android::inputdispatcher {
+
+/* Specifies which events are to be canceled and why. */
+struct CancelationOptions {
+    enum Mode {
+        CANCEL_ALL_EVENTS = 0,
+        CANCEL_POINTER_EVENTS = 1,
+        CANCEL_NON_POINTER_EVENTS = 2,
+        CANCEL_FALLBACK_EVENTS = 3,
+    };
+
+    // The criterion to use to determine which events should be canceled.
+    Mode mode;
+
+    // Descriptive reason for the cancelation.
+    const char* reason;
+
+    // The specific keycode of the key event to cancel, or nullopt to cancel any key event.
+    std::optional<int32_t> keyCode = std::nullopt;
+
+    // The specific device id of events to cancel, or nullopt to cancel events from any device.
+    std::optional<int32_t> deviceId = std::nullopt;
+
+    // The specific display id of events to cancel, or nullopt to cancel events on any display.
+    std::optional<int32_t> displayId = std::nullopt;
+
+    CancelationOptions(Mode mode, const char* reason) : mode(mode), reason(reason) {}
+};
+
+} // namespace android::inputdispatcher
+
+#endif // _UI_INPUT_INPUTDISPATCHER_CANCELLATIONOPTIONS_H