recovery: Move SwipeDetector into common location (9020e0f1) · Commits · e / tools / etwrp

Android.mk

+1 −0

Original line number	Diff line number	Diff line
		@@ -41,6 +41,7 @@ LOCAL_SRC_FILES := \
		ui.cpp \
		verifier.cpp \
		wear_ui.cpp \
		wear_touch.cpp \

		LOCAL_MODULE := recovery

wear_touch.cpp

0 → 100644

+177 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2016 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.
		*/

		#include "common.h"
		#include "wear_touch.h"

		#include <dirent.h>
		#include <fcntl.h>
		#include <stdio.h>
		#include <stdlib.h>
		#include <unistd.h>
		#include <errno.h>
		#include <string.h>

		#include <linux/input.h>

		#define DEVICE_PATH "/dev/input"

		WearSwipeDetector::WearSwipeDetector(int low, int high, OnSwipeCallback callback, void* cookie):
		mLowThreshold(low),
		mHighThreshold(high),
		mCallback(callback),
		mCookie(cookie),
		mCurrentSlot(-1) {
		pthread_create(&mThread, NULL, touch_thread, this);
		}

		WearSwipeDetector::~WearSwipeDetector() {
		}

		void WearSwipeDetector::detect(int dx, int dy) {
		enum SwipeDirection direction;

		if (abs(dy) < mLowThreshold && abs(dx) > mHighThreshold) {
		direction = dx < 0 ? LEFT : RIGHT;
		} else if (abs(dx) < mLowThreshold && abs(dy) > mHighThreshold) {
		direction = dy < 0 ? UP : DOWN;
		} else {
		LOGD("Ignore %d %d\n", dx, dy);
		return;
		}

		LOGD("Swipe direction=%d\n", direction);
		mCallback(mCookie, direction);
		}

		void WearSwipeDetector::process(struct input_event *event) {
		if (mCurrentSlot < 0) {
		mCallback(mCookie, UP);
		mCurrentSlot = 0;
		}

		if (event->type == EV_ABS) {
		if (event->code == ABS_MT_SLOT)
		mCurrentSlot = event->value;

		// Ignore other fingers
		if (mCurrentSlot > 0) {
		return;
		}

		switch (event->code) {
		case ABS_MT_POSITION_X:
		mX = event->value;
		mFingerDown = true;
		break;

		case ABS_MT_POSITION_Y:
		mY = event->value;
		mFingerDown = true;
		break;

		case ABS_MT_TRACKING_ID:
		if (event->value < 0)
		mFingerDown = false;
		break;
		}
		} else if (event->type == EV_SYN) {
		if (event->code == SYN_REPORT) {
		if (mFingerDown && !mSwiping) {
		mStartX = mX;
		mStartY = mY;
		mSwiping = true;
		} else if (!mFingerDown && mSwiping) {
		mSwiping = false;
		detect(mX - mStartX, mY - mStartY);
		}
		}
		}
		}

		void WearSwipeDetector::run() {
		int fd = findDevice(DEVICE_PATH);
		if (fd < 0) {
		LOGE("no input devices found\n");
		return;
		}

		struct input_event event;
		while (read(fd, &event, sizeof(event)) == sizeof(event)) {
		process(&event);
		}

		close(fd);
		}

		void* WearSwipeDetector::touch_thread(void* cookie) {
		((WearSwipeDetector*)cookie)->run();
		return NULL;
		}

		#define test_bit(bit, array) (array[bit/8] & (1<<(bit%8)))

		int WearSwipeDetector::openDevice(const char *device) {
		int fd = open(device, O_RDONLY);
		if (fd < 0) {
		LOGE("could not open %s, %s\n", device, strerror(errno));
		return false;
		}

		char name[80];
		name[sizeof(name) - 1] = '\0';
		if (ioctl(fd, EVIOCGNAME(sizeof(name) - 1), &name) < 1) {
		LOGE("could not get device name for %s, %s\n", device, strerror(errno));
		name[0] = '\0';
		}

		uint8_t bits[512];
		memset(bits, 0, sizeof(bits));
		int ret = ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(bits)), bits);
		if (ret > 0) {
		if (test_bit(ABS_MT_POSITION_X, bits) && test_bit(ABS_MT_POSITION_Y, bits)) {
		LOGD("Found %s %s\n", device, name);
		return fd;
		}
		}

		close(fd);
		return -1;
		}

		int WearSwipeDetector::findDevice(const char* path) {
		DIR* dir = opendir(path);
		if (dir == NULL) {
		LOGE("Could not open directory %s", path);
		return false;
		}

		struct dirent* entry;
		int ret = -1;
		while (ret < 0 && (entry = readdir(dir)) != NULL) {
		if (entry->d_name[0] == '.') continue;

		char device[PATH_MAX];
		device[PATH_MAX-1] = '\0';
		snprintf(device, PATH_MAX-1, "%s/%s", path, entry->d_name);

		ret = openDevice(device);
		}

		closedir(dir);
		return ret;
		}

wear_touch.h

0 → 100644

+58 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2016 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 __WEAR_TOUCH_H
		#define __WEAR_TOUCH_H

		#include <pthread.h>

		class WearSwipeDetector {

		public:
		enum SwipeDirection { UP, DOWN, RIGHT, LEFT };
		typedef void (OnSwipeCallback)(void cookie, enum SwipeDirection direction);

		WearSwipeDetector(int low, int high, OnSwipeCallback cb, void* cookie);
		~WearSwipeDetector();

		private:
		void run();
		void process(struct input_event *event);
		void detect(int dx, int dy);

		pthread_t mThread;
		static void* touch_thread(void* cookie);

		int findDevice(const char* path);
		int openDevice(const char* device);

		int mLowThreshold;
		int mHighThreshold;

		OnSwipeCallback mCallback;
		void *mCookie;

		int mX;
		int mY;
		int mStartX;
		int mStartY;

		int mCurrentSlot;
		bool mFingerDown;
		bool mSwiping;
		};

		#endif // __WEAR_TOUCH_H