90f0cee685
This change fixes several issues where events would be dropped in the input dispatch pipeline in such a way that the dispatcher could not accurately track the state of the input device. Given more robust tracking, we can now also provide robust cancelation of input events in cases where an application might otherwise become out of sync with the event stream due to ANR, app switch, policy decisions, or forced focus transitions. Pruned some of the input dispatcher log output. Moved the responsibility for calling intercept*BeforeQueueing into the input dispatcher instead of the input reader and added support for early interception of injected events for events coming from trusted sources. This enables behaviors like injection of media keys while the screen is off, haptic feedback of injected virtual keys, so injected events become more "first class" in a way. Change-Id: Iec6ff1dd21e5f3c7feb80ea4feb5382bd090dbd9
499 lines
14 KiB
C++
499 lines
14 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/KeyedVector.h>
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#include <utils/Timers.h>
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#include <utils/RefBase.h>
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#include <utils/String8.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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AKEY_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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* Smallest number of pointers is 1.
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*/
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#define MAX_POINTERS 10
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/*
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* Maximum pointer id value supported in a motion event.
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* Smallest pointer id is 0.
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* (This is limited by our use of BitSet32 to track pointer assignments.)
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*/
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#define MAX_POINTER_ID 31
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/*
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* Declare a concrete type for the NDK's input event forward declaration.
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*/
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struct AInputEvent {
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virtual ~AInputEvent() { }
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};
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/*
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* Declare a concrete type for the NDK's input device forward declaration.
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*/
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struct AInputDevice {
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virtual ~AInputDevice() { }
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};
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namespace android {
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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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* These flags are also defined in frameworks/base/core/java/android/view/WindowManagerPolicy.java.
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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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* See also labels for policy flags in KeycodeLabels.h. */
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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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POLICY_FLAG_VIRTUAL = 0x00000100,
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POLICY_FLAG_RAW_MASK = 0x0000ffff,
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/* These flags are set by the input dispatcher. */
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// Indicates that the input event was injected.
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POLICY_FLAG_INJECTED = 0x01000000,
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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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// Indicates that the event should be dispatched to applications.
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// The input event should still be sent to the InputDispatcher so that it can see all
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// input events received include those that it will not deliver.
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POLICY_FLAG_PASS_TO_USER = 0x40000000,
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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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float touchMajor;
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float touchMinor;
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float toolMajor;
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float toolMinor;
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float orientation;
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};
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/*
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* Input events.
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*/
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class InputEvent : public AInputEvent {
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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 getSource() const { return mSource; }
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protected:
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void initialize(int32_t deviceId, int32_t source);
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void initialize(const InputEvent& from);
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private:
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int32_t mDeviceId;
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int32_t mSource;
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};
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/*
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* Key events.
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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 AINPUT_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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// Return true if this event may have a default action implementation.
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static bool hasDefaultAction(int32_t keyCode);
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bool hasDefaultAction() const;
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// Return true if this event represents a system key.
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static bool isSystemKey(int32_t keyCode);
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bool isSystemKey() const;
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void initialize(
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int32_t deviceId,
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int32_t source,
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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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void initialize(const KeyEvent& from);
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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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/*
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* Motion events.
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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 AINPUT_EVENT_TYPE_MOTION; }
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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 getEdgeFlags() const { return mEdgeFlags; }
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inline int32_t getMetaState() const { return mMetaState; }
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inline float getXOffset() const { return mXOffset; }
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inline float getYOffset() const { return mYOffset; }
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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(size_t pointerIndex) const {
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return getCurrentPointerCoords(pointerIndex).x;
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}
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inline float getRawY(size_t pointerIndex) const {
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return getCurrentPointerCoords(pointerIndex).y;
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}
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inline float getX(size_t pointerIndex) const {
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return getRawX(pointerIndex) + mXOffset;
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}
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inline float getY(size_t pointerIndex) const {
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return getRawY(pointerIndex) + mYOffset;
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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 float getTouchMajor(size_t pointerIndex) const {
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return getCurrentPointerCoords(pointerIndex).touchMajor;
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}
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inline float getTouchMinor(size_t pointerIndex) const {
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return getCurrentPointerCoords(pointerIndex).touchMinor;
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}
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inline float getToolMajor(size_t pointerIndex) const {
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return getCurrentPointerCoords(pointerIndex).toolMajor;
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}
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inline float getToolMinor(size_t pointerIndex) const {
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return getCurrentPointerCoords(pointerIndex).toolMinor;
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}
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inline float getOrientation(size_t pointerIndex) const {
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return getCurrentPointerCoords(pointerIndex).orientation;
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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 getHistoricalRawX(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 getHistoricalRawY(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 getHistoricalX(size_t pointerIndex, size_t historicalIndex) const {
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return getHistoricalRawX(pointerIndex, historicalIndex) + mXOffset;
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}
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inline float getHistoricalY(size_t pointerIndex, size_t historicalIndex) const {
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return getHistoricalRawY(pointerIndex, historicalIndex) + mYOffset;
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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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inline float getHistoricalTouchMajor(size_t pointerIndex, size_t historicalIndex) const {
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return getHistoricalPointerCoords(pointerIndex, historicalIndex).touchMajor;
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}
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inline float getHistoricalTouchMinor(size_t pointerIndex, size_t historicalIndex) const {
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return getHistoricalPointerCoords(pointerIndex, historicalIndex).touchMinor;
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}
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inline float getHistoricalToolMajor(size_t pointerIndex, size_t historicalIndex) const {
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return getHistoricalPointerCoords(pointerIndex, historicalIndex).toolMajor;
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}
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inline float getHistoricalToolMinor(size_t pointerIndex, size_t historicalIndex) const {
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return getHistoricalPointerCoords(pointerIndex, historicalIndex).toolMinor;
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}
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inline float getHistoricalOrientation(size_t pointerIndex, size_t historicalIndex) const {
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return getHistoricalPointerCoords(pointerIndex, historicalIndex).orientation;
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}
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void initialize(
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int32_t deviceId,
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int32_t source,
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int32_t action,
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int32_t flags,
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int32_t edgeFlags,
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int32_t metaState,
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float xOffset,
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float yOffset,
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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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// Low-level accessors.
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inline const int32_t* getPointerIds() const { return mPointerIds.array(); }
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inline const nsecs_t* getSampleEventTimes() const { return mSampleEventTimes.array(); }
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inline const PointerCoords* getSamplePointerCoords() const {
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return mSamplePointerCoords.array();
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}
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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 mEdgeFlags;
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int32_t mMetaState;
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float mXOffset;
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float mYOffset;
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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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/*
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* Describes the characteristics and capabilities of an input device.
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*/
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class InputDeviceInfo {
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public:
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InputDeviceInfo();
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InputDeviceInfo(const InputDeviceInfo& other);
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~InputDeviceInfo();
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struct MotionRange {
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float min;
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float max;
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float flat;
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float fuzz;
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};
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void initialize(int32_t id, const String8& name);
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inline int32_t getId() const { return mId; }
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inline const String8 getName() const { return mName; }
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inline uint32_t getSources() const { return mSources; }
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const MotionRange* getMotionRange(int32_t rangeType) const;
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void addSource(uint32_t source);
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void addMotionRange(int32_t rangeType, float min, float max, float flat, float fuzz);
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void addMotionRange(int32_t rangeType, const MotionRange& range);
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inline void setKeyboardType(int32_t keyboardType) { mKeyboardType = keyboardType; }
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inline int32_t getKeyboardType() const { return mKeyboardType; }
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inline const KeyedVector<int32_t, MotionRange> getMotionRanges() const {
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return mMotionRanges;
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}
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private:
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int32_t mId;
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String8 mName;
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uint32_t mSources;
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int32_t mKeyboardType;
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KeyedVector<int32_t, MotionRange> mMotionRanges;
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};
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} // namespace android
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#endif // _UI_INPUT_H
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