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Diffstat (limited to 'services/input/InputDispatcher.h')
| -rw-r--r-- | services/input/InputDispatcher.h | 1123 |
1 files changed, 0 insertions, 1123 deletions
diff --git a/services/input/InputDispatcher.h b/services/input/InputDispatcher.h deleted file mode 100644 index 190e7b2..0000000 --- a/services/input/InputDispatcher.h +++ /dev/null @@ -1,1123 +0,0 @@ -/* - * Copyright (C) 2010 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_DISPATCHER_H -#define _UI_INPUT_DISPATCHER_H - -#include <input/Input.h> -#include <input/InputTransport.h> -#include <utils/KeyedVector.h> -#include <utils/Vector.h> -#include <utils/threads.h> -#include <utils/Timers.h> -#include <utils/RefBase.h> -#include <utils/String8.h> -#include <utils/Looper.h> -#include <utils/BitSet.h> -#include <cutils/atomic.h> - -#include <stddef.h> -#include <unistd.h> -#include <limits.h> - -#include "InputWindow.h" -#include "InputApplication.h" -#include "InputListener.h" - - -namespace android { - -/* - * Constants used to report the outcome of input event injection. - */ -enum { - /* (INTERNAL USE ONLY) Specifies that injection is pending and its outcome is unknown. */ - INPUT_EVENT_INJECTION_PENDING = -1, - - /* Injection succeeded. */ - INPUT_EVENT_INJECTION_SUCCEEDED = 0, - - /* Injection failed because the injector did not have permission to inject - * into the application with input focus. */ - INPUT_EVENT_INJECTION_PERMISSION_DENIED = 1, - - /* Injection failed because there were no available input targets. */ - INPUT_EVENT_INJECTION_FAILED = 2, - - /* Injection failed due to a timeout. */ - INPUT_EVENT_INJECTION_TIMED_OUT = 3 -}; - -/* - * Constants used to determine the input event injection synchronization mode. - */ -enum { - /* Injection is asynchronous and is assumed always to be successful. */ - INPUT_EVENT_INJECTION_SYNC_NONE = 0, - - /* Waits for previous events to be dispatched so that the input dispatcher can determine - * whether input event injection willbe permitted based on the current input focus. - * Does not wait for the input event to finish processing. */ - INPUT_EVENT_INJECTION_SYNC_WAIT_FOR_RESULT = 1, - - /* Waits for the input event to be completely processed. */ - INPUT_EVENT_INJECTION_SYNC_WAIT_FOR_FINISHED = 2, -}; - - -/* - * An input target specifies how an input event is to be dispatched to a particular window - * including the window's input channel, control flags, a timeout, and an X / Y offset to - * be added to input event coordinates to compensate for the absolute position of the - * window area. - */ -struct InputTarget { - enum { - /* This flag indicates that the event is being delivered to a foreground application. */ - FLAG_FOREGROUND = 1 << 0, - - /* This flag indicates that the target of a MotionEvent is partly or wholly - * obscured by another visible window above it. The motion event should be - * delivered with flag AMOTION_EVENT_FLAG_WINDOW_IS_OBSCURED. */ - FLAG_WINDOW_IS_OBSCURED = 1 << 1, - - /* This flag indicates that a motion event is being split across multiple windows. */ - FLAG_SPLIT = 1 << 2, - - /* This flag indicates that the pointer coordinates dispatched to the application - * will be zeroed out to avoid revealing information to an application. This is - * used in conjunction with FLAG_DISPATCH_AS_OUTSIDE to prevent apps not sharing - * the same UID from watching all touches. */ - FLAG_ZERO_COORDS = 1 << 3, - - /* This flag indicates that the event should be sent as is. - * Should always be set unless the event is to be transmuted. */ - FLAG_DISPATCH_AS_IS = 1 << 8, - - /* This flag indicates that a MotionEvent with AMOTION_EVENT_ACTION_DOWN falls outside - * of the area of this target and so should instead be delivered as an - * AMOTION_EVENT_ACTION_OUTSIDE to this target. */ - FLAG_DISPATCH_AS_OUTSIDE = 1 << 9, - - /* This flag indicates that a hover sequence is starting in the given window. - * The event is transmuted into ACTION_HOVER_ENTER. */ - FLAG_DISPATCH_AS_HOVER_ENTER = 1 << 10, - - /* This flag indicates that a hover event happened outside of a window which handled - * previous hover events, signifying the end of the current hover sequence for that - * window. - * The event is transmuted into ACTION_HOVER_ENTER. */ - FLAG_DISPATCH_AS_HOVER_EXIT = 1 << 11, - - /* This flag indicates that the event should be canceled. - * It is used to transmute ACTION_MOVE into ACTION_CANCEL when a touch slips - * outside of a window. */ - FLAG_DISPATCH_AS_SLIPPERY_EXIT = 1 << 12, - - /* This flag indicates that the event should be dispatched as an initial down. - * It is used to transmute ACTION_MOVE into ACTION_DOWN when a touch slips - * into a new window. */ - FLAG_DISPATCH_AS_SLIPPERY_ENTER = 1 << 13, - - /* Mask for all dispatch modes. */ - FLAG_DISPATCH_MASK = FLAG_DISPATCH_AS_IS - | FLAG_DISPATCH_AS_OUTSIDE - | FLAG_DISPATCH_AS_HOVER_ENTER - | FLAG_DISPATCH_AS_HOVER_EXIT - | FLAG_DISPATCH_AS_SLIPPERY_EXIT - | FLAG_DISPATCH_AS_SLIPPERY_ENTER, - }; - - // The input channel to be targeted. - sp<InputChannel> inputChannel; - - // Flags for the input target. - int32_t flags; - - // The x and y offset to add to a MotionEvent as it is delivered. - // (ignored for KeyEvents) - float xOffset, yOffset; - - // Scaling factor to apply to MotionEvent as it is delivered. - // (ignored for KeyEvents) - float scaleFactor; - - // The subset of pointer ids to include in motion events dispatched to this input target - // if FLAG_SPLIT is set. - BitSet32 pointerIds; -}; - - -/* - * Input dispatcher configuration. - * - * Specifies various options that modify the behavior of the input dispatcher. - * The values provided here are merely defaults. The actual values will come from ViewConfiguration - * and are passed into the dispatcher during initialization. - */ -struct InputDispatcherConfiguration { - // The key repeat initial timeout. - nsecs_t keyRepeatTimeout; - - // The key repeat inter-key delay. - nsecs_t keyRepeatDelay; - - InputDispatcherConfiguration() : - keyRepeatTimeout(500 * 1000000LL), - keyRepeatDelay(50 * 1000000LL) { } -}; - - -/* - * Input dispatcher policy interface. - * - * The input reader policy is used by the input reader 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 InputDispatcherPolicyInterface : public virtual RefBase { -protected: - InputDispatcherPolicyInterface() { } - virtual ~InputDispatcherPolicyInterface() { } - -public: - /* Notifies the system that a configuration change has occurred. */ - virtual void notifyConfigurationChanged(nsecs_t when) = 0; - - /* Notifies the system that an application is not responding. - * Returns a new timeout to continue waiting, or 0 to abort dispatch. */ - virtual nsecs_t notifyANR(const sp<InputApplicationHandle>& inputApplicationHandle, - const sp<InputWindowHandle>& inputWindowHandle, - const String8& reason) = 0; - - /* Notifies the system that an input channel is unrecoverably broken. */ - virtual void notifyInputChannelBroken(const sp<InputWindowHandle>& inputWindowHandle) = 0; - - /* Gets the input dispatcher configuration. */ - virtual void getDispatcherConfiguration(InputDispatcherConfiguration* outConfig) = 0; - - /* Returns true if automatic key repeating is enabled. */ - virtual bool isKeyRepeatEnabled() = 0; - - /* Filters an input event. - * Return true to dispatch the event unmodified, false to consume the event. - * A filter can also transform and inject events later by passing POLICY_FLAG_FILTERED - * to injectInputEvent. - */ - virtual bool filterInputEvent(const InputEvent* inputEvent, uint32_t policyFlags) = 0; - - /* Intercepts a key event immediately before queueing it. - * The policy can use this method as an opportunity to perform power management functions - * and early event preprocessing such as updating policy flags. - * - * This method is expected to set the POLICY_FLAG_PASS_TO_USER policy flag if the event - * should be dispatched to applications. - */ - virtual void interceptKeyBeforeQueueing(const KeyEvent* keyEvent, uint32_t& policyFlags) = 0; - - /* Intercepts a touch, trackball or other motion event before queueing it. - * The policy can use this method as an opportunity to perform power management functions - * and early event preprocessing such as updating policy flags. - * - * This method is expected to set the POLICY_FLAG_PASS_TO_USER policy flag if the event - * should be dispatched to applications. - */ - virtual void interceptMotionBeforeQueueing(nsecs_t when, uint32_t& policyFlags) = 0; - - /* Allows the policy a chance to intercept a key before dispatching. */ - virtual nsecs_t interceptKeyBeforeDispatching(const sp<InputWindowHandle>& inputWindowHandle, - const KeyEvent* keyEvent, uint32_t policyFlags) = 0; - - /* Allows the policy a chance to perform default processing for an unhandled key. - * Returns an alternate keycode to redispatch as a fallback, or 0 to give up. */ - virtual bool dispatchUnhandledKey(const sp<InputWindowHandle>& inputWindowHandle, - const KeyEvent* keyEvent, uint32_t policyFlags, KeyEvent* outFallbackKeyEvent) = 0; - - /* Notifies the policy about switch events. - */ - virtual void notifySwitch(nsecs_t when, - uint32_t switchValues, uint32_t switchMask, uint32_t policyFlags) = 0; - - /* Poke user activity for an event dispatched to a window. */ - virtual void pokeUserActivity(nsecs_t eventTime, int32_t eventType) = 0; - - /* Checks whether a given application pid/uid has permission to inject input events - * into other applications. - * - * This method is special in that its implementation promises to be non-reentrant and - * is safe to call while holding other locks. (Most other methods make no such guarantees!) - */ - virtual bool checkInjectEventsPermissionNonReentrant( - int32_t injectorPid, int32_t injectorUid) = 0; -}; - - -/* Notifies the system about input events generated by the input reader. - * The dispatcher is expected to be mostly asynchronous. */ -class InputDispatcherInterface : public virtual RefBase, public InputListenerInterface { -protected: - InputDispatcherInterface() { } - virtual ~InputDispatcherInterface() { } - -public: - /* Dumps the state of the input dispatcher. - * - * This method may be called on any thread (usually by the input manager). */ - virtual void dump(String8& dump) = 0; - - /* Called by the heatbeat to ensures that the dispatcher has not deadlocked. */ - virtual void monitor() = 0; - - /* Runs a single iteration of the dispatch loop. - * Nominally processes one queued event, a timeout, or a response from an input consumer. - * - * This method should only be called on the input dispatcher thread. - */ - virtual void dispatchOnce() = 0; - - /* Injects an input event and optionally waits for sync. - * The synchronization mode determines whether the method blocks while waiting for - * input injection to proceed. - * Returns one of the INPUT_EVENT_INJECTION_XXX constants. - * - * This method may be called on any thread (usually by the input manager). - */ - virtual int32_t injectInputEvent(const InputEvent* event, - int32_t injectorPid, int32_t injectorUid, int32_t syncMode, int32_t timeoutMillis, - uint32_t policyFlags) = 0; - - /* Sets the list of input windows. - * - * This method may be called on any thread (usually by the input manager). - */ - virtual void setInputWindows(const Vector<sp<InputWindowHandle> >& inputWindowHandles) = 0; - - /* Sets the focused application. - * - * This method may be called on any thread (usually by the input manager). - */ - virtual void setFocusedApplication( - const sp<InputApplicationHandle>& inputApplicationHandle) = 0; - - /* Sets the input dispatching mode. - * - * This method may be called on any thread (usually by the input manager). - */ - virtual void setInputDispatchMode(bool enabled, bool frozen) = 0; - - /* Sets whether input event filtering is enabled. - * When enabled, incoming input events are sent to the policy's filterInputEvent - * method instead of being dispatched. The filter is expected to use - * injectInputEvent to inject the events it would like to have dispatched. - * It should include POLICY_FLAG_FILTERED in the policy flags during injection. - */ - virtual void setInputFilterEnabled(bool enabled) = 0; - - /* Transfers touch focus from the window associated with one channel to the - * window associated with the other channel. - * - * Returns true on success. False if the window did not actually have touch focus. - */ - virtual bool transferTouchFocus(const sp<InputChannel>& fromChannel, - const sp<InputChannel>& toChannel) = 0; - - /* Registers or unregister input channels that may be used as targets for input events. - * If monitor is true, the channel will receive a copy of all input events. - * - * These methods may be called on any thread (usually by the input manager). - */ - virtual status_t registerInputChannel(const sp<InputChannel>& inputChannel, - const sp<InputWindowHandle>& inputWindowHandle, bool monitor) = 0; - virtual status_t unregisterInputChannel(const sp<InputChannel>& inputChannel) = 0; -}; - -/* Dispatches events to input targets. Some functions of the input dispatcher, such as - * identifying input targets, are controlled by a separate policy object. - * - * IMPORTANT INVARIANT: - * Because the policy can potentially block or cause re-entrance into the input dispatcher, - * the input dispatcher never calls into the policy while holding its internal locks. - * The implementation is also carefully designed to recover from scenarios such as an - * input channel becoming unregistered while identifying input targets or processing timeouts. - * - * Methods marked 'Locked' must be called with the lock acquired. - * - * Methods marked 'LockedInterruptible' must be called with the lock acquired but - * may during the course of their execution release the lock, call into the policy, and - * then reacquire the lock. The caller is responsible for recovering gracefully. - * - * A 'LockedInterruptible' method may called a 'Locked' method, but NOT vice-versa. - */ -class InputDispatcher : public InputDispatcherInterface { -protected: - virtual ~InputDispatcher(); - -public: - explicit InputDispatcher(const sp<InputDispatcherPolicyInterface>& policy); - - virtual void dump(String8& dump); - virtual void monitor(); - - virtual void dispatchOnce(); - - virtual void notifyConfigurationChanged(const NotifyConfigurationChangedArgs* args); - virtual void notifyKey(const NotifyKeyArgs* args); - virtual void notifyMotion(const NotifyMotionArgs* args); - virtual void notifySwitch(const NotifySwitchArgs* args); - virtual void notifyDeviceReset(const NotifyDeviceResetArgs* args); - - virtual int32_t injectInputEvent(const InputEvent* event, - int32_t injectorPid, int32_t injectorUid, int32_t syncMode, int32_t timeoutMillis, - uint32_t policyFlags); - - virtual void setInputWindows(const Vector<sp<InputWindowHandle> >& inputWindowHandles); - virtual void setFocusedApplication(const sp<InputApplicationHandle>& inputApplicationHandle); - virtual void setInputDispatchMode(bool enabled, bool frozen); - virtual void setInputFilterEnabled(bool enabled); - - virtual bool transferTouchFocus(const sp<InputChannel>& fromChannel, - const sp<InputChannel>& toChannel); - - virtual status_t registerInputChannel(const sp<InputChannel>& inputChannel, - const sp<InputWindowHandle>& inputWindowHandle, bool monitor); - virtual status_t unregisterInputChannel(const sp<InputChannel>& inputChannel); - -private: - template <typename T> - struct Link { - T* next; - T* prev; - - protected: - inline Link() : next(NULL), prev(NULL) { } - }; - - struct InjectionState { - mutable int32_t refCount; - - int32_t injectorPid; - int32_t injectorUid; - int32_t injectionResult; // initially INPUT_EVENT_INJECTION_PENDING - bool injectionIsAsync; // set to true if injection is not waiting for the result - int32_t pendingForegroundDispatches; // the number of foreground dispatches in progress - - InjectionState(int32_t injectorPid, int32_t injectorUid); - void release(); - - private: - ~InjectionState(); - }; - - struct EventEntry : Link<EventEntry> { - enum { - TYPE_CONFIGURATION_CHANGED, - TYPE_DEVICE_RESET, - TYPE_KEY, - TYPE_MOTION - }; - - mutable int32_t refCount; - int32_t type; - nsecs_t eventTime; - uint32_t policyFlags; - InjectionState* injectionState; - - bool dispatchInProgress; // initially false, set to true while dispatching - - inline bool isInjected() const { return injectionState != NULL; } - - void release(); - - virtual void appendDescription(String8& msg) const = 0; - - protected: - EventEntry(int32_t type, nsecs_t eventTime, uint32_t policyFlags); - virtual ~EventEntry(); - void releaseInjectionState(); - }; - - struct ConfigurationChangedEntry : EventEntry { - ConfigurationChangedEntry(nsecs_t eventTime); - virtual void appendDescription(String8& msg) const; - - protected: - virtual ~ConfigurationChangedEntry(); - }; - - struct DeviceResetEntry : EventEntry { - int32_t deviceId; - - DeviceResetEntry(nsecs_t eventTime, int32_t deviceId); - virtual void appendDescription(String8& msg) const; - - protected: - virtual ~DeviceResetEntry(); - }; - - struct KeyEntry : EventEntry { - int32_t deviceId; - uint32_t source; - int32_t action; - int32_t flags; - int32_t keyCode; - int32_t scanCode; - int32_t metaState; - int32_t repeatCount; - nsecs_t downTime; - - bool syntheticRepeat; // set to true for synthetic key repeats - - enum InterceptKeyResult { - INTERCEPT_KEY_RESULT_UNKNOWN, - INTERCEPT_KEY_RESULT_SKIP, - INTERCEPT_KEY_RESULT_CONTINUE, - INTERCEPT_KEY_RESULT_TRY_AGAIN_LATER, - }; - InterceptKeyResult interceptKeyResult; // set based on the interception result - nsecs_t interceptKeyWakeupTime; // used with INTERCEPT_KEY_RESULT_TRY_AGAIN_LATER - - KeyEntry(nsecs_t eventTime, - int32_t deviceId, uint32_t source, uint32_t policyFlags, int32_t action, - int32_t flags, int32_t keyCode, int32_t scanCode, int32_t metaState, - int32_t repeatCount, nsecs_t downTime); - virtual void appendDescription(String8& msg) const; - void recycle(); - - protected: - virtual ~KeyEntry(); - }; - - struct MotionEntry : EventEntry { - nsecs_t eventTime; - int32_t deviceId; - uint32_t source; - int32_t action; - int32_t flags; - int32_t metaState; - int32_t buttonState; - int32_t edgeFlags; - float xPrecision; - float yPrecision; - nsecs_t downTime; - int32_t displayId; - uint32_t pointerCount; - PointerProperties pointerProperties[MAX_POINTERS]; - PointerCoords pointerCoords[MAX_POINTERS]; - - MotionEntry(nsecs_t eventTime, - int32_t deviceId, uint32_t source, uint32_t policyFlags, - int32_t action, int32_t flags, - int32_t metaState, int32_t buttonState, int32_t edgeFlags, - float xPrecision, float yPrecision, - nsecs_t downTime, int32_t displayId, uint32_t pointerCount, - const PointerProperties* pointerProperties, const PointerCoords* pointerCoords); - virtual void appendDescription(String8& msg) const; - - protected: - virtual ~MotionEntry(); - }; - - // Tracks the progress of dispatching a particular event to a particular connection. - struct DispatchEntry : Link<DispatchEntry> { - const uint32_t seq; // unique sequence number, never 0 - - EventEntry* eventEntry; // the event to dispatch - int32_t targetFlags; - float xOffset; - float yOffset; - float scaleFactor; - nsecs_t deliveryTime; // time when the event was actually delivered - - // Set to the resolved action and flags when the event is enqueued. - int32_t resolvedAction; - int32_t resolvedFlags; - - DispatchEntry(EventEntry* eventEntry, - int32_t targetFlags, float xOffset, float yOffset, float scaleFactor); - ~DispatchEntry(); - - inline bool hasForegroundTarget() const { - return targetFlags & InputTarget::FLAG_FOREGROUND; - } - - inline bool isSplit() const { - return targetFlags & InputTarget::FLAG_SPLIT; - } - - private: - static volatile int32_t sNextSeqAtomic; - - static uint32_t nextSeq(); - }; - - // A command entry captures state and behavior for an action to be performed in the - // dispatch loop after the initial processing has taken place. It is essentially - // a kind of continuation used to postpone sensitive policy interactions to a point - // in the dispatch loop where it is safe to release the lock (generally after finishing - // the critical parts of the dispatch cycle). - // - // The special thing about commands is that they can voluntarily release and reacquire - // the dispatcher lock at will. Initially when the command starts running, the - // dispatcher lock is held. However, if the command needs to call into the policy to - // do some work, it can release the lock, do the work, then reacquire the lock again - // before returning. - // - // This mechanism is a bit clunky but it helps to preserve the invariant that the dispatch - // never calls into the policy while holding its lock. - // - // Commands are implicitly 'LockedInterruptible'. - struct CommandEntry; - typedef void (InputDispatcher::*Command)(CommandEntry* commandEntry); - - class Connection; - struct CommandEntry : Link<CommandEntry> { - CommandEntry(Command command); - ~CommandEntry(); - - Command command; - - // parameters for the command (usage varies by command) - sp<Connection> connection; - nsecs_t eventTime; - KeyEntry* keyEntry; - sp<InputApplicationHandle> inputApplicationHandle; - sp<InputWindowHandle> inputWindowHandle; - String8 reason; - int32_t userActivityEventType; - uint32_t seq; - bool handled; - }; - - // Generic queue implementation. - template <typename T> - struct Queue { - T* head; - T* tail; - - inline Queue() : head(NULL), tail(NULL) { - } - - inline bool isEmpty() const { - return !head; - } - - inline void enqueueAtTail(T* entry) { - entry->prev = tail; - if (tail) { - tail->next = entry; - } else { - head = entry; - } - entry->next = NULL; - tail = entry; - } - - inline void enqueueAtHead(T* entry) { - entry->next = head; - if (head) { - head->prev = entry; - } else { - tail = entry; - } - entry->prev = NULL; - head = entry; - } - - inline void dequeue(T* entry) { - if (entry->prev) { - entry->prev->next = entry->next; - } else { - head = entry->next; - } - if (entry->next) { - entry->next->prev = entry->prev; - } else { - tail = entry->prev; - } - } - - inline T* dequeueAtHead() { - T* entry = head; - head = entry->next; - if (head) { - head->prev = NULL; - } else { - tail = NULL; - } - return entry; - } - - uint32_t count() const; - }; - - /* 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 -1 to cancel any key event. - int32_t keyCode; - - // The specific device id of events to cancel, or -1 to cancel events from any device. - int32_t deviceId; - - CancelationOptions(Mode mode, const char* reason) : - mode(mode), reason(reason), keyCode(-1), deviceId(-1) { } - }; - - /* Tracks dispatched key and motion event state so that cancelation events can be - * synthesized when events are dropped. */ - class InputState { - public: - InputState(); - ~InputState(); - - // Returns true if there is no state to be canceled. - bool isNeutral() const; - - // Returns true if the specified source is known to have received a hover enter - // motion event. - bool isHovering(int32_t deviceId, uint32_t source, int32_t displayId) const; - - // Records tracking information for a key event that has just been published. - // Returns true if the event should be delivered, false if it is inconsistent - // and should be skipped. - bool trackKey(const KeyEntry* entry, int32_t action, int32_t flags); - - // Records tracking information for a motion event that has just been published. - // Returns true if the event should be delivered, false if it is inconsistent - // and should be skipped. - bool trackMotion(const MotionEntry* entry, int32_t action, int32_t flags); - - // Synthesizes cancelation events for the current state and resets the tracked state. - void synthesizeCancelationEvents(nsecs_t currentTime, - Vector<EventEntry*>& outEvents, const CancelationOptions& options); - - // Clears the current state. - void clear(); - - // Copies pointer-related parts of the input state to another instance. - void copyPointerStateTo(InputState& other) const; - - // Gets the fallback key associated with a keycode. - // Returns -1 if none. - // Returns AKEYCODE_UNKNOWN if we are only dispatching the unhandled key to the policy. - int32_t getFallbackKey(int32_t originalKeyCode); - - // Sets the fallback key for a particular keycode. - void setFallbackKey(int32_t originalKeyCode, int32_t fallbackKeyCode); - - // Removes the fallback key for a particular keycode. - void removeFallbackKey(int32_t originalKeyCode); - - inline const KeyedVector<int32_t, int32_t>& getFallbackKeys() const { - return mFallbackKeys; - } - - private: - struct KeyMemento { - int32_t deviceId; - uint32_t source; - int32_t keyCode; - int32_t scanCode; - int32_t metaState; - int32_t flags; - nsecs_t downTime; - uint32_t policyFlags; - }; - - struct MotionMemento { - int32_t deviceId; - uint32_t source; - int32_t flags; - float xPrecision; - float yPrecision; - nsecs_t downTime; - int32_t displayId; - uint32_t pointerCount; - PointerProperties pointerProperties[MAX_POINTERS]; - PointerCoords pointerCoords[MAX_POINTERS]; - bool hovering; - uint32_t policyFlags; - - void setPointers(const MotionEntry* entry); - }; - - Vector<KeyMemento> mKeyMementos; - Vector<MotionMemento> mMotionMementos; - KeyedVector<int32_t, int32_t> mFallbackKeys; - - ssize_t findKeyMemento(const KeyEntry* entry) const; - ssize_t findMotionMemento(const MotionEntry* entry, bool hovering) const; - - void addKeyMemento(const KeyEntry* entry, int32_t flags); - void addMotionMemento(const MotionEntry* entry, int32_t flags, bool hovering); - - static bool shouldCancelKey(const KeyMemento& memento, - const CancelationOptions& options); - static bool shouldCancelMotion(const MotionMemento& memento, - const CancelationOptions& options); - }; - - /* Manages the dispatch state associated with a single input channel. */ - class Connection : public RefBase { - protected: - virtual ~Connection(); - - public: - enum Status { - // Everything is peachy. - STATUS_NORMAL, - // An unrecoverable communication error has occurred. - STATUS_BROKEN, - // The input channel has been unregistered. - STATUS_ZOMBIE - }; - - Status status; - sp<InputChannel> inputChannel; // never null - sp<InputWindowHandle> inputWindowHandle; // may be null - bool monitor; - InputPublisher inputPublisher; - InputState inputState; - - // True if the socket is full and no further events can be published until - // the application consumes some of the input. - bool inputPublisherBlocked; - - // Queue of events that need to be published to the connection. - Queue<DispatchEntry> outboundQueue; - - // Queue of events that have been published to the connection but that have not - // yet received a "finished" response from the application. - Queue<DispatchEntry> waitQueue; - - explicit Connection(const sp<InputChannel>& inputChannel, - const sp<InputWindowHandle>& inputWindowHandle, bool monitor); - - inline const char* getInputChannelName() const { return inputChannel->getName().string(); } - - const char* getWindowName() const; - const char* getStatusLabel() const; - - DispatchEntry* findWaitQueueEntry(uint32_t seq); - }; - - enum DropReason { - DROP_REASON_NOT_DROPPED = 0, - DROP_REASON_POLICY = 1, - DROP_REASON_APP_SWITCH = 2, - DROP_REASON_DISABLED = 3, - DROP_REASON_BLOCKED = 4, - DROP_REASON_STALE = 5, - }; - - sp<InputDispatcherPolicyInterface> mPolicy; - InputDispatcherConfiguration mConfig; - - Mutex mLock; - - Condition mDispatcherIsAliveCondition; - - sp<Looper> mLooper; - - EventEntry* mPendingEvent; - Queue<EventEntry> mInboundQueue; - Queue<EventEntry> mRecentQueue; - Queue<CommandEntry> mCommandQueue; - - void dispatchOnceInnerLocked(nsecs_t* nextWakeupTime); - - // Enqueues an inbound event. Returns true if mLooper->wake() should be called. - bool enqueueInboundEventLocked(EventEntry* entry); - - // Cleans up input state when dropping an inbound event. - void dropInboundEventLocked(EventEntry* entry, DropReason dropReason); - - // Adds an event to a queue of recent events for debugging purposes. - void addRecentEventLocked(EventEntry* entry); - - // App switch latency optimization. - bool mAppSwitchSawKeyDown; - nsecs_t mAppSwitchDueTime; - - static bool isAppSwitchKeyCode(int32_t keyCode); - bool isAppSwitchKeyEventLocked(KeyEntry* keyEntry); - bool isAppSwitchPendingLocked(); - void resetPendingAppSwitchLocked(bool handled); - - // Stale event latency optimization. - static bool isStaleEventLocked(nsecs_t currentTime, EventEntry* entry); - - // Blocked event latency optimization. Drops old events when the user intends - // to transfer focus to a new application. - EventEntry* mNextUnblockedEvent; - - sp<InputWindowHandle> findTouchedWindowAtLocked(int32_t displayId, int32_t x, int32_t y); - - // All registered connections mapped by channel file descriptor. - KeyedVector<int, sp<Connection> > mConnectionsByFd; - - ssize_t getConnectionIndexLocked(const sp<InputChannel>& inputChannel); - - // Input channels that will receive a copy of all input events. - Vector<sp<InputChannel> > mMonitoringChannels; - - // Event injection and synchronization. - Condition mInjectionResultAvailableCondition; - bool hasInjectionPermission(int32_t injectorPid, int32_t injectorUid); - void setInjectionResultLocked(EventEntry* entry, int32_t injectionResult); - - Condition mInjectionSyncFinishedCondition; - void incrementPendingForegroundDispatchesLocked(EventEntry* entry); - void decrementPendingForegroundDispatchesLocked(EventEntry* entry); - - // Key repeat tracking. - struct KeyRepeatState { - KeyEntry* lastKeyEntry; // or null if no repeat - nsecs_t nextRepeatTime; - } mKeyRepeatState; - - void resetKeyRepeatLocked(); - KeyEntry* synthesizeKeyRepeatLocked(nsecs_t currentTime); - - // Deferred command processing. - bool haveCommandsLocked() const; - bool runCommandsLockedInterruptible(); - CommandEntry* postCommandLocked(Command command); - - // Input filter processing. - bool shouldSendKeyToInputFilterLocked(const NotifyKeyArgs* args); - bool shouldSendMotionToInputFilterLocked(const NotifyMotionArgs* args); - - // Inbound event processing. - void drainInboundQueueLocked(); - void releasePendingEventLocked(); - void releaseInboundEventLocked(EventEntry* entry); - - // Dispatch state. - bool mDispatchEnabled; - bool mDispatchFrozen; - bool mInputFilterEnabled; - - Vector<sp<InputWindowHandle> > mWindowHandles; - - sp<InputWindowHandle> getWindowHandleLocked(const sp<InputChannel>& inputChannel) const; - bool hasWindowHandleLocked(const sp<InputWindowHandle>& windowHandle) const; - - // Focus tracking for keys, trackball, etc. - sp<InputWindowHandle> mFocusedWindowHandle; - - // Focus tracking for touch. - struct TouchedWindow { - sp<InputWindowHandle> windowHandle; - int32_t targetFlags; - BitSet32 pointerIds; // zero unless target flag FLAG_SPLIT is set - }; - struct TouchState { - bool down; - bool split; - int32_t deviceId; // id of the device that is currently down, others are rejected - uint32_t source; // source of the device that is current down, others are rejected - int32_t displayId; // id to the display that currently has a touch, others are rejected - Vector<TouchedWindow> windows; - - TouchState(); - ~TouchState(); - void reset(); - void copyFrom(const TouchState& other); - void addOrUpdateWindow(const sp<InputWindowHandle>& windowHandle, - int32_t targetFlags, BitSet32 pointerIds); - void removeWindow(const sp<InputWindowHandle>& windowHandle); - void filterNonAsIsTouchWindows(); - sp<InputWindowHandle> getFirstForegroundWindowHandle() const; - bool isSlippery() const; - }; - - TouchState mTouchState; - TouchState mTempTouchState; - - // Focused application. - sp<InputApplicationHandle> mFocusedApplicationHandle; - - // Dispatcher state at time of last ANR. - String8 mLastANRState; - - // Dispatch inbound events. - bool dispatchConfigurationChangedLocked( - nsecs_t currentTime, ConfigurationChangedEntry* entry); - bool dispatchDeviceResetLocked( - nsecs_t currentTime, DeviceResetEntry* entry); - bool dispatchKeyLocked( - nsecs_t currentTime, KeyEntry* entry, - DropReason* dropReason, nsecs_t* nextWakeupTime); - bool dispatchMotionLocked( - nsecs_t currentTime, MotionEntry* entry, - DropReason* dropReason, nsecs_t* nextWakeupTime); - void dispatchEventLocked(nsecs_t currentTime, EventEntry* entry, - const Vector<InputTarget>& inputTargets); - - void logOutboundKeyDetailsLocked(const char* prefix, const KeyEntry* entry); - void logOutboundMotionDetailsLocked(const char* prefix, const MotionEntry* entry); - - // Keeping track of ANR timeouts. - enum InputTargetWaitCause { - INPUT_TARGET_WAIT_CAUSE_NONE, - INPUT_TARGET_WAIT_CAUSE_SYSTEM_NOT_READY, - INPUT_TARGET_WAIT_CAUSE_APPLICATION_NOT_READY, - }; - - InputTargetWaitCause mInputTargetWaitCause; - nsecs_t mInputTargetWaitStartTime; - nsecs_t mInputTargetWaitTimeoutTime; - bool mInputTargetWaitTimeoutExpired; - sp<InputApplicationHandle> mInputTargetWaitApplicationHandle; - - // Contains the last window which received a hover event. - sp<InputWindowHandle> mLastHoverWindowHandle; - - // Finding targets for input events. - int32_t handleTargetsNotReadyLocked(nsecs_t currentTime, const EventEntry* entry, - const sp<InputApplicationHandle>& applicationHandle, - const sp<InputWindowHandle>& windowHandle, - nsecs_t* nextWakeupTime, const char* reason); - void resumeAfterTargetsNotReadyTimeoutLocked(nsecs_t newTimeout, - const sp<InputChannel>& inputChannel); - nsecs_t getTimeSpentWaitingForApplicationLocked(nsecs_t currentTime); - void resetANRTimeoutsLocked(); - - int32_t findFocusedWindowTargetsLocked(nsecs_t currentTime, const EventEntry* entry, - Vector<InputTarget>& inputTargets, nsecs_t* nextWakeupTime); - int32_t findTouchedWindowTargetsLocked(nsecs_t currentTime, const MotionEntry* entry, - Vector<InputTarget>& inputTargets, nsecs_t* nextWakeupTime, - bool* outConflictingPointerActions); - - void addWindowTargetLocked(const sp<InputWindowHandle>& windowHandle, - int32_t targetFlags, BitSet32 pointerIds, Vector<InputTarget>& inputTargets); - void addMonitoringTargetsLocked(Vector<InputTarget>& inputTargets); - - void pokeUserActivityLocked(const EventEntry* eventEntry); - bool checkInjectionPermission(const sp<InputWindowHandle>& windowHandle, - const InjectionState* injectionState); - bool isWindowObscuredAtPointLocked(const sp<InputWindowHandle>& windowHandle, - int32_t x, int32_t y) const; - bool isWindowReadyForMoreInputLocked(nsecs_t currentTime, - const sp<InputWindowHandle>& windowHandle, const EventEntry* eventEntry); - String8 getApplicationWindowLabelLocked(const sp<InputApplicationHandle>& applicationHandle, - const sp<InputWindowHandle>& windowHandle); - - // Manage the dispatch cycle for a single connection. - // These methods are deliberately not Interruptible because doing all of the work - // with the mutex held makes it easier to ensure that connection invariants are maintained. - // If needed, the methods post commands to run later once the critical bits are done. - void prepareDispatchCycleLocked(nsecs_t currentTime, const sp<Connection>& connection, - EventEntry* eventEntry, const InputTarget* inputTarget); - void enqueueDispatchEntriesLocked(nsecs_t currentTime, const sp<Connection>& connection, - EventEntry* eventEntry, const InputTarget* inputTarget); - void enqueueDispatchEntryLocked(const sp<Connection>& connection, - EventEntry* eventEntry, const InputTarget* inputTarget, int32_t dispatchMode); - void startDispatchCycleLocked(nsecs_t currentTime, const sp<Connection>& connection); - void finishDispatchCycleLocked(nsecs_t currentTime, const sp<Connection>& connection, - uint32_t seq, bool handled); - void abortBrokenDispatchCycleLocked(nsecs_t currentTime, const sp<Connection>& connection, - bool notify); - void drainDispatchQueueLocked(Queue<DispatchEntry>* queue); - void releaseDispatchEntryLocked(DispatchEntry* dispatchEntry); - static int handleReceiveCallback(int fd, int events, void* data); - - void synthesizeCancelationEventsForAllConnectionsLocked( - const CancelationOptions& options); - void synthesizeCancelationEventsForInputChannelLocked(const sp<InputChannel>& channel, - const CancelationOptions& options); - void synthesizeCancelationEventsForConnectionLocked(const sp<Connection>& connection, - const CancelationOptions& options); - - // Splitting motion events across windows. - MotionEntry* splitMotionEvent(const MotionEntry* originalMotionEntry, BitSet32 pointerIds); - - // Reset and drop everything the dispatcher is doing. - void resetAndDropEverythingLocked(const char* reason); - - // Dump state. - void dumpDispatchStateLocked(String8& dump); - void logDispatchStateLocked(); - - // Registration. - void removeMonitorChannelLocked(const sp<InputChannel>& inputChannel); - status_t unregisterInputChannelLocked(const sp<InputChannel>& inputChannel, bool notify); - - // Add or remove a connection to the mActiveConnections vector. - void activateConnectionLocked(Connection* connection); - void deactivateConnectionLocked(Connection* connection); - - // Interesting events that we might like to log or tell the framework about. - void onDispatchCycleFinishedLocked( - nsecs_t currentTime, const sp<Connection>& connection, uint32_t seq, bool handled); - void onDispatchCycleBrokenLocked( - nsecs_t currentTime, const sp<Connection>& connection); - void onANRLocked( - nsecs_t currentTime, const sp<InputApplicationHandle>& applicationHandle, - const sp<InputWindowHandle>& windowHandle, - nsecs_t eventTime, nsecs_t waitStartTime, const char* reason); - - // Outbound policy interactions. - void doNotifyConfigurationChangedInterruptible(CommandEntry* commandEntry); - void doNotifyInputChannelBrokenLockedInterruptible(CommandEntry* commandEntry); - void doNotifyANRLockedInterruptible(CommandEntry* commandEntry); - void doInterceptKeyBeforeDispatchingLockedInterruptible(CommandEntry* commandEntry); - void doDispatchCycleFinishedLockedInterruptible(CommandEntry* commandEntry); - bool afterKeyEventLockedInterruptible(const sp<Connection>& connection, - DispatchEntry* dispatchEntry, KeyEntry* keyEntry, bool handled); - bool afterMotionEventLockedInterruptible(const sp<Connection>& connection, - DispatchEntry* dispatchEntry, MotionEntry* motionEntry, bool handled); - void doPokeUserActivityLockedInterruptible(CommandEntry* commandEntry); - void initializeKeyEvent(KeyEvent* event, const KeyEntry* entry); - - // Statistics gathering. - void updateDispatchStatisticsLocked(nsecs_t currentTime, const EventEntry* entry, - int32_t injectionResult, nsecs_t timeSpentWaitingForApplication); - void traceInboundQueueLengthLocked(); - void traceOutboundQueueLengthLocked(const sp<Connection>& connection); - void traceWaitQueueLengthLocked(const sp<Connection>& connection); -}; - -/* Enqueues and dispatches input events, endlessly. */ -class InputDispatcherThread : public Thread { -public: - explicit InputDispatcherThread(const sp<InputDispatcherInterface>& dispatcher); - ~InputDispatcherThread(); - -private: - virtual bool threadLoop(); - - sp<InputDispatcherInterface> mDispatcher; -}; - -} // namespace android - -#endif // _UI_INPUT_DISPATCHER_H |