54bc281639
Refactored the code to eliminate potential deadlocks due to re-entrant calls from the policy into the dispatcher. Also added some plumbing that will be used to notify the framework about ANRs. Change-Id: Iba7a10de0cb3c56cd7520d6ce716db52fdcc94ff
342 lines
8.9 KiB
C++
342 lines
8.9 KiB
C++
/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef _UI_INPUT_H
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#define _UI_INPUT_H
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/**
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* Native input event structures.
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*/
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#include <android/input.h>
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#include <utils/Vector.h>
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#include <utils/Timers.h>
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/*
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* Additional private constants not defined in ndk/ui/input.h.
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*/
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enum {
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/*
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* Private control to determine when an app is tracking a key sequence.
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*/
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KEY_EVENT_FLAG_START_TRACKING = 0x40000000
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};
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/*
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* Maximum number of pointers supported per motion event.
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*/
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#define MAX_POINTERS 10
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namespace android {
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/*
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* A raw event as retrieved from the EventHub.
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*/
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struct RawEvent {
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nsecs_t when;
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int32_t deviceId;
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int32_t type;
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int32_t scanCode;
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int32_t keyCode;
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int32_t value;
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uint32_t flags;
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};
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/*
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* Flags that flow alongside events in the input dispatch system to help with certain
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* policy decisions such as waking from device sleep.
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*
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* TODO This enumeration should probably be split up or relabeled for clarity.
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*/
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enum {
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/* These flags originate in RawEvents and are generally set in the key map. */
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POLICY_FLAG_WAKE = 0x00000001,
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POLICY_FLAG_WAKE_DROPPED = 0x00000002,
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POLICY_FLAG_SHIFT = 0x00000004,
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POLICY_FLAG_CAPS_LOCK = 0x00000008,
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POLICY_FLAG_ALT = 0x00000010,
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POLICY_FLAG_ALT_GR = 0x00000020,
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POLICY_FLAG_MENU = 0x00000040,
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POLICY_FLAG_LAUNCHER = 0x00000080,
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/* These flags are set by the input reader policy as it intercepts each event. */
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// Indicates that the screen was off when the event was received and the event
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// should wake the device.
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POLICY_FLAG_WOKE_HERE = 0x10000000,
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// Indicates that the screen was dim when the event was received and the event
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// should brighten the device.
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POLICY_FLAG_BRIGHT_HERE = 0x20000000,
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};
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/*
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* Describes the basic configuration of input devices that are present.
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*/
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struct InputConfiguration {
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enum {
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TOUCHSCREEN_UNDEFINED = 0,
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TOUCHSCREEN_NOTOUCH = 1,
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TOUCHSCREEN_STYLUS = 2,
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TOUCHSCREEN_FINGER = 3
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};
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enum {
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KEYBOARD_UNDEFINED = 0,
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KEYBOARD_NOKEYS = 1,
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KEYBOARD_QWERTY = 2,
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KEYBOARD_12KEY = 3
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};
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enum {
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NAVIGATION_UNDEFINED = 0,
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NAVIGATION_NONAV = 1,
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NAVIGATION_DPAD = 2,
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NAVIGATION_TRACKBALL = 3,
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NAVIGATION_WHEEL = 4
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};
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int32_t touchScreen;
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int32_t keyboard;
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int32_t navigation;
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};
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/*
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* Pointer coordinate data.
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*/
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struct PointerCoords {
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float x;
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float y;
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float pressure;
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float size;
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};
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/*
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* Input events.
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*/
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struct input_event_t { };
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class InputEvent : public input_event_t {
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public:
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virtual ~InputEvent() { }
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virtual int32_t getType() const = 0;
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inline int32_t getDeviceId() const { return mDeviceId; }
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inline int32_t getNature() const { return mNature; }
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protected:
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void initialize(int32_t deviceId, int32_t nature);
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private:
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int32_t mDeviceId;
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int32_t mNature;
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};
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class KeyEvent : public InputEvent {
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public:
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virtual ~KeyEvent() { }
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virtual int32_t getType() const { return INPUT_EVENT_TYPE_KEY; }
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inline int32_t getAction() const { return mAction; }
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inline int32_t getFlags() const { return mFlags; }
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inline int32_t getKeyCode() const { return mKeyCode; }
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inline int32_t getScanCode() const { return mScanCode; }
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inline int32_t getMetaState() const { return mMetaState; }
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inline int32_t getRepeatCount() const { return mRepeatCount; }
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inline nsecs_t getDownTime() const { return mDownTime; }
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inline nsecs_t getEventTime() const { return mEventTime; }
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void initialize(
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int32_t deviceId,
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int32_t nature,
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int32_t action,
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int32_t flags,
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int32_t keyCode,
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int32_t scanCode,
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int32_t metaState,
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int32_t repeatCount,
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nsecs_t downTime,
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nsecs_t eventTime);
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private:
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int32_t mAction;
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int32_t mFlags;
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int32_t mKeyCode;
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int32_t mScanCode;
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int32_t mMetaState;
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int32_t mRepeatCount;
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nsecs_t mDownTime;
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nsecs_t mEventTime;
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};
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class MotionEvent : public InputEvent {
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public:
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virtual ~MotionEvent() { }
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virtual int32_t getType() const { return INPUT_EVENT_TYPE_MOTION; }
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inline int32_t getAction() const { return mAction; }
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inline int32_t getEdgeFlags() const { return mEdgeFlags; }
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inline int32_t getMetaState() const { return mMetaState; }
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inline float getXPrecision() const { return mXPrecision; }
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inline float getYPrecision() const { return mYPrecision; }
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inline nsecs_t getDownTime() const { return mDownTime; }
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inline size_t getPointerCount() const { return mPointerIds.size(); }
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inline int32_t getPointerId(size_t pointerIndex) const { return mPointerIds[pointerIndex]; }
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inline nsecs_t getEventTime() const { return mSampleEventTimes[getHistorySize()]; }
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inline float getRawX() const { return mRawX; }
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inline float getRawY() const { return mRawY; }
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inline float getX(size_t pointerIndex) const {
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return getCurrentPointerCoords(pointerIndex).x;
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}
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inline float getY(size_t pointerIndex) const {
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return getCurrentPointerCoords(pointerIndex).y;
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}
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inline float getPressure(size_t pointerIndex) const {
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return getCurrentPointerCoords(pointerIndex).pressure;
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}
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inline float getSize(size_t pointerIndex) const {
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return getCurrentPointerCoords(pointerIndex).size;
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}
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inline size_t getHistorySize() const { return mSampleEventTimes.size() - 1; }
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inline nsecs_t getHistoricalEventTime(size_t historicalIndex) const {
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return mSampleEventTimes[historicalIndex];
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}
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inline float getHistoricalX(size_t pointerIndex, size_t historicalIndex) const {
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return getHistoricalPointerCoords(pointerIndex, historicalIndex).x;
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}
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inline float getHistoricalY(size_t pointerIndex, size_t historicalIndex) const {
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return getHistoricalPointerCoords(pointerIndex, historicalIndex).y;
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}
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inline float getHistoricalPressure(size_t pointerIndex, size_t historicalIndex) const {
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return getHistoricalPointerCoords(pointerIndex, historicalIndex).pressure;
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}
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inline float getHistoricalSize(size_t pointerIndex, size_t historicalIndex) const {
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return getHistoricalPointerCoords(pointerIndex, historicalIndex).size;
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}
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void initialize(
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int32_t deviceId,
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int32_t nature,
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int32_t action,
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int32_t edgeFlags,
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int32_t metaState,
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float rawX,
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float rawY,
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float xPrecision,
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float yPrecision,
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nsecs_t downTime,
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nsecs_t eventTime,
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size_t pointerCount,
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const int32_t* pointerIds,
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const PointerCoords* pointerCoords);
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void addSample(
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nsecs_t eventTime,
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const PointerCoords* pointerCoords);
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void offsetLocation(float xOffset, float yOffset);
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private:
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int32_t mAction;
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int32_t mEdgeFlags;
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int32_t mMetaState;
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float mRawX;
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float mRawY;
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float mXPrecision;
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float mYPrecision;
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nsecs_t mDownTime;
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Vector<int32_t> mPointerIds;
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Vector<nsecs_t> mSampleEventTimes;
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Vector<PointerCoords> mSamplePointerCoords;
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inline const PointerCoords& getCurrentPointerCoords(size_t pointerIndex) const {
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return mSamplePointerCoords[getHistorySize() * getPointerCount() + pointerIndex];
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}
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inline const PointerCoords& getHistoricalPointerCoords(
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size_t pointerIndex, size_t historicalIndex) const {
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return mSamplePointerCoords[historicalIndex * getPointerCount() + pointerIndex];
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}
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};
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/*
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* Input event factory.
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*/
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class InputEventFactoryInterface {
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protected:
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virtual ~InputEventFactoryInterface() { }
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public:
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InputEventFactoryInterface() { }
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virtual KeyEvent* createKeyEvent() = 0;
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virtual MotionEvent* createMotionEvent() = 0;
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};
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/*
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* A simple input event factory implementation that uses a single preallocated instance
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* of each type of input event that are reused for each request.
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*/
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class PreallocatedInputEventFactory : public InputEventFactoryInterface {
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public:
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PreallocatedInputEventFactory() { }
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virtual ~PreallocatedInputEventFactory() { }
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virtual KeyEvent* createKeyEvent() { return & mKeyEvent; }
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virtual MotionEvent* createMotionEvent() { return & mMotionEvent; }
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private:
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KeyEvent mKeyEvent;
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MotionEvent mMotionEvent;
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};
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} // namespace android
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#endif // _UI_INPUT_H
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