From c782be6e6fb5ccfd5905376e43720f4c89e49d3b Mon Sep 17 00:00:00 2001
From: Liam Harrington <wharrington@google.com>
Date: Fri, 17 Jul 2020 19:48:24 +0000
Subject: Refactor of PointerController

Abstracted logic that applies to all pointer types into general
PointerController class and moved implementation of logic specific
to the mouse cursor and touch spots to MouseCursorController and
TouchSpotController, respectively.
Test: Pixel 3XL device, atest PointerController_test, compile

Change-Id: Ia5825c37ca75951cc8bcd7d5102c986bd957e69f
---
 libs/input/PointerControllerContext.h | 154 ++++++++++++++++++++++++++++++++++
 1 file changed, 154 insertions(+)
 create mode 100644 libs/input/PointerControllerContext.h

(limited to 'libs/input/PointerControllerContext.h')

diff --git a/libs/input/PointerControllerContext.h b/libs/input/PointerControllerContext.h
new file mode 100644
index 000000000000..92e1bda25f56
--- /dev/null
+++ b/libs/input/PointerControllerContext.h
@@ -0,0 +1,154 @@
+/*
+ * Copyright (C) 2020 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_POINTER_CONTROLLER_CONTEXT_H
+#define _UI_POINTER_CONTROLLER_CONTEXT_H
+
+#include <PointerControllerInterface.h>
+#include <gui/DisplayEventReceiver.h>
+#include <input/DisplayViewport.h>
+#include <input/Input.h>
+#include <ui/DisplayInfo.h>
+#include <utils/BitSet.h>
+#include <utils/Looper.h>
+#include <utils/RefBase.h>
+
+#include <map>
+#include <memory>
+#include <vector>
+
+#include "SpriteController.h"
+
+namespace android {
+
+class PointerController;
+
+/*
+ * Pointer resources.
+ */
+struct PointerResources {
+    SpriteIcon spotHover;
+    SpriteIcon spotTouch;
+    SpriteIcon spotAnchor;
+};
+
+struct PointerAnimation {
+    std::vector<SpriteIcon> animationFrames;
+    nsecs_t durationPerFrame;
+};
+
+enum class InactivityTimeout {
+    NORMAL = 0,
+    SHORT = 1,
+};
+
+/*
+ * Pointer controller policy interface.
+ *
+ * The pointer controller policy is used by the pointer controller to interact with
+ * the Window Manager and other system components.
+ *
+ * The actual implementation is partially supported by callbacks into the DVM
+ * via JNI.  This interface is also mocked in the unit tests.
+ */
+class PointerControllerPolicyInterface : public virtual RefBase {
+protected:
+    PointerControllerPolicyInterface() {}
+    virtual ~PointerControllerPolicyInterface() {}
+
+public:
+    virtual void loadPointerIcon(SpriteIcon* icon, int32_t displayId) = 0;
+    virtual void loadPointerResources(PointerResources* outResources, int32_t displayId) = 0;
+    virtual void loadAdditionalMouseResources(
+            std::map<int32_t, SpriteIcon>* outResources,
+            std::map<int32_t, PointerAnimation>* outAnimationResources, int32_t displayId) = 0;
+    virtual int32_t getDefaultPointerIconId() = 0;
+    virtual int32_t getCustomPointerIconId() = 0;
+};
+
+/*
+ * Contains logic and resources shared among PointerController,
+ * MouseCursorController, and TouchSpotController.
+ */
+
+class PointerControllerContext {
+public:
+    PointerControllerContext(const sp<PointerControllerPolicyInterface>& policy,
+                             const sp<Looper>& looper, const sp<SpriteController>& spriteController,
+                             PointerController& controller);
+    ~PointerControllerContext();
+
+    void removeInactivityTimeout();
+    void resetInactivityTimeout();
+    void startAnimation();
+    void setInactivityTimeout(InactivityTimeout inactivityTimeout);
+
+    void setAnimationPending(bool animationPending);
+    nsecs_t getAnimationTime();
+
+    void clearSpotsByDisplay(int32_t displayId);
+
+    void setHandlerController(std::shared_ptr<PointerController> controller);
+    void setCallbackController(std::shared_ptr<PointerController> controller);
+
+    sp<PointerControllerPolicyInterface> getPolicy();
+    sp<SpriteController> getSpriteController();
+
+    void initializeDisplayEventReceiver();
+    void handleDisplayEvents();
+
+    class MessageHandler : public virtual android::MessageHandler {
+    public:
+        enum {
+            MSG_INACTIVITY_TIMEOUT,
+        };
+
+        void handleMessage(const Message& message) override;
+        std::weak_ptr<PointerController> pointerController;
+    };
+
+    class LooperCallback : public virtual android::LooperCallback {
+    public:
+        int handleEvent(int fd, int events, void* data) override;
+        std::weak_ptr<PointerController> pointerController;
+    };
+
+private:
+    sp<PointerControllerPolicyInterface> mPolicy;
+    sp<Looper> mLooper;
+    sp<SpriteController> mSpriteController;
+    sp<MessageHandler> mHandler;
+    sp<LooperCallback> mCallback;
+
+    DisplayEventReceiver mDisplayEventReceiver;
+
+    PointerController& mController;
+
+    mutable std::mutex mLock;
+
+    struct Locked {
+        bool animationPending;
+        nsecs_t animationTime;
+
+        InactivityTimeout inactivityTimeout;
+    } mLocked GUARDED_BY(mLock);
+
+    void resetInactivityTimeoutLocked();
+};
+
+} // namespace android
+
+#endif // _UI_POINTER_CONTROLLER_CONTEXT_H
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