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133 lines
4.8 KiB
133 lines
4.8 KiB
/*
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* Copyright (C) 2019 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_INPUTDISPATCHER_INPUTSTATE_H
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#define _UI_INPUT_INPUTDISPATCHER_INPUTSTATE_H
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#include "CancelationOptions.h"
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#include "Entry.h"
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#include <utils/Timers.h>
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namespace android::inputdispatcher {
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static constexpr int32_t INVALID_POINTER_INDEX = -1;
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/* Tracks dispatched key and motion event state so that cancellation events can be
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* synthesized when events are dropped. */
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class InputState {
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public:
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explicit InputState(const IdGenerator& idGenerator);
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~InputState();
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// Returns true if there is no state to be canceled.
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bool isNeutral() const;
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// Returns true if the specified source is known to have received a hover enter
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// motion event.
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bool isHovering(int32_t deviceId, uint32_t source, int32_t displayId) const;
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// Records tracking information for a key event that has just been published.
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// Returns true if the event should be delivered, false if it is inconsistent
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// and should be skipped.
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bool trackKey(const KeyEntry& entry, int32_t action, int32_t flags);
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// Records tracking information for a motion event that has just been published.
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// Returns true if the event should be delivered, false if it is inconsistent
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// and should be skipped.
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bool trackMotion(const MotionEntry& entry, int32_t action, int32_t flags);
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// Synthesizes cancelation events for the current state and resets the tracked state.
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std::vector<std::unique_ptr<EventEntry>> synthesizeCancelationEvents(
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nsecs_t currentTime, const CancelationOptions& options);
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// Synthesizes down events for the current state.
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std::vector<std::unique_ptr<EventEntry>> synthesizePointerDownEvents(nsecs_t currentTime);
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// Clears the current state.
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void clear();
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// Merges pointer-related parts of the input state into another instance.
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void mergePointerStateTo(InputState& other);
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// Gets the fallback key associated with a keycode.
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// Returns -1 if none.
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// Returns AKEYCODE_UNKNOWN if we are only dispatching the unhandled key to the policy.
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int32_t getFallbackKey(int32_t originalKeyCode);
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// Sets the fallback key for a particular keycode.
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void setFallbackKey(int32_t originalKeyCode, int32_t fallbackKeyCode);
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// Removes the fallback key for a particular keycode.
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void removeFallbackKey(int32_t originalKeyCode);
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inline const KeyedVector<int32_t, int32_t>& getFallbackKeys() const { return mFallbackKeys; }
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private:
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struct KeyMemento {
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int32_t deviceId;
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uint32_t source;
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int32_t displayId;
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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 flags;
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nsecs_t downTime;
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uint32_t policyFlags;
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};
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struct MotionMemento {
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int32_t deviceId;
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uint32_t source;
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int32_t displayId;
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int32_t flags;
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float xPrecision;
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float yPrecision;
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float xCursorPosition;
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float yCursorPosition;
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nsecs_t downTime;
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uint32_t pointerCount;
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PointerProperties pointerProperties[MAX_POINTERS];
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PointerCoords pointerCoords[MAX_POINTERS];
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// Track for which pointers the target doesn't know about.
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int32_t firstNewPointerIdx = INVALID_POINTER_INDEX;
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bool hovering;
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uint32_t policyFlags;
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void setPointers(const MotionEntry& entry);
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void mergePointerStateTo(MotionMemento& other) const;
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};
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const IdGenerator& mIdGenerator; // InputDispatcher owns it so we won't have dangling reference.
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std::vector<KeyMemento> mKeyMementos;
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std::vector<MotionMemento> mMotionMementos;
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KeyedVector<int32_t, int32_t> mFallbackKeys;
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ssize_t findKeyMemento(const KeyEntry& entry) const;
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ssize_t findMotionMemento(const MotionEntry& entry, bool hovering) const;
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void addKeyMemento(const KeyEntry& entry, int32_t flags);
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void addMotionMemento(const MotionEntry& entry, int32_t flags, bool hovering);
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static bool shouldCancelKey(const KeyMemento& memento, const CancelationOptions& options);
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static bool shouldCancelMotion(const MotionMemento& memento, const CancelationOptions& options);
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};
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} // namespace android::inputdispatcher
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#endif // _UI_INPUT_INPUTDISPATCHER_INPUTSTATE_H
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