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feat: Implement touchpad relative input mode
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Xtr126
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Nov 20, 2023
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,116 @@ | ||
| #include "mouse_cursor.h" | ||
| #include <thread> | ||
| #include <jni.h> | ||
| #include <vector> | ||
| #include <iostream> | ||
| #include <cstdio> | ||
| #include <cstring> | ||
| #include <dirent.h> | ||
| #include <unistd.h> | ||
| #include <fcntl.h> | ||
| #include <sys/poll.h> | ||
| #include <linux/uinput.h> | ||
| #include <linux/input.h> | ||
| #include <linux/input-event-codes.h> | ||
| #include <cstdlib> | ||
| #include "evdev_common.h" | ||
|
|
||
| using std::string; | ||
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| std::vector<string> ListInputDevices() { | ||
| const string input_directory = "/dev/input"; | ||
| std::vector<string> filenames; | ||
| struct DIR * directory = opendir(input_directory.c_str()); | ||
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| struct dirent *entry; | ||
| while ((entry = readdir(directory))) { | ||
| if (strcmp(entry->d_name, ".") != 0 && strcmp(entry->d_name, "..") != 0) { | ||
| filenames.push_back(input_directory + "/" + entry->d_name); | ||
| } | ||
| } | ||
| return filenames; | ||
| } | ||
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| std::vector<int> scanTouchpadDevices() { | ||
| std::vector<string> evdevNames = ListInputDevices(); | ||
| std::vector<int> touchpadDeviceFds; | ||
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| printf("I: Searching for touchpad devices...\n"); | ||
| for (auto & evdev : evdevNames) { | ||
| int device_fd = open(evdev.c_str(), O_RDWR); | ||
| if (device_fd < 0) { | ||
| perror("opening device"); | ||
| } | ||
|
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| // Get device name | ||
| char dev_name[24]; | ||
| if(!ioctl(device_fd, EVIOCGNAME(sizeof(dev_name) - 1), &dev_name)) { | ||
| perror("get device name"); | ||
| close(device_fd); | ||
| continue; | ||
| } | ||
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| if(!HasSpecificAbs(device_fd, ABS_X) || !HasSpecificAbs(device_fd, ABS_Y)) { | ||
| printf("%s does not have ABS_X or ABS_Y events\n", dev_name); | ||
| printf("%s: Not a touch device\n", dev_name); | ||
| close(device_fd); | ||
| continue; | ||
| } | ||
|
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| if (!HasInputProp(device_fd, INPUT_PROP_POINTER)) { | ||
| printf("%s does not have INPUT_PROP_POINTER\n", dev_name); | ||
| printf("%s: Not a touchpad device\n", dev_name); | ||
| close(device_fd); | ||
| continue; | ||
| } | ||
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| // Check for virtual devices | ||
| if (x_virtual_tablet == dev_name || x_virtual_mouse == dev_name) { | ||
| printf("skipping %s\n", dev_name); | ||
| close(device_fd); | ||
| continue; | ||
| } | ||
| else if (x_virtual_touch == dev_name) { | ||
| touchpadDeviceFds.clear(); | ||
| return touchpadDeviceFds; | ||
| } | ||
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| printf(" adding touchpad device...\n", evdev.c_str()); | ||
| ioctl(device_fd, EVIOCGRAB, (void *)1); | ||
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| touchpadDeviceFds.push_back(device_fd); | ||
| } | ||
| return touchpadDeviceFds; | ||
| } | ||
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| bool HasSpecificAbs(int device_fd, unsigned int abs) { | ||
| unsigned long nchar = KEY_MAX / 8 + 1; | ||
| unsigned char bits[nchar]; | ||
| // Get the bit fields of available abs events. | ||
| ioctl(device_fd, EVIOCGBIT(EV_ABS, sizeof(bits)), &bits); | ||
| return bits[abs/8] & (1 << (abs % 8)); | ||
| } | ||
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||
| bool HasSpecificKey(int device_fd, unsigned int key) { | ||
| unsigned long nchar = KEY_MAX / 8 + 1; | ||
| unsigned char bits[nchar]; | ||
| // Get the bit fields of available keys. | ||
| ioctl(device_fd, EVIOCGBIT(EV_KEY, sizeof(bits)), &bits); | ||
| return bits[key/8] & (1 << (key % 8)); | ||
| } | ||
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| bool HasInputProp(int device_fd, unsigned int input_prop) { | ||
| unsigned long nchar = INPUT_PROP_MAX / 8 + 1; | ||
| unsigned char bits[nchar]; | ||
| // Get the bit fields of available keys. | ||
| ioctl(device_fd, EVIOCGPROP(sizeof(bits)), &bits); | ||
| return bits[input_prop/8] & (1 << (input_prop % 8)); | ||
| } | ||
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| bool HasEventType(int device_fd, unsigned int type) { | ||
| unsigned long evbit = 0; | ||
| // Get the bit field of available event types. | ||
| ioctl(device_fd, EVIOCGBIT(0, sizeof(evbit)), &evbit); | ||
| return evbit & (1 << type); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,16 @@ | ||
| using std::string; | ||
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| const char *x_virtual_touch = "x-virtual-touch"; | ||
| const char *x_virtual_mouse = "x-virtual-mouse"; | ||
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| std::vector<string> ListInputDevices(); | ||
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| std::vector<int> scanTouchpadDevices(); | ||
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| bool HasSpecificAbs(int device_fd, unsigned int abs); | ||
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| bool HasSpecificKey(int device_fd, unsigned int key); | ||
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| bool HasInputProp(int device_fd, unsigned int input_prop); | ||
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| bool HasEventType(int device_fd, unsigned int type); |
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