Move indev to shared component

CHANGELOG.md

@@ -10,7 +10,7 @@ If a change only affects particular applications, they are listed in parentheses
 
 ## Unreleased
 
-Nothing at the moment
+- feat(buffyboard): Handle input device connection/disconnection at runtime; adds new dependency libudev
 
 ## 3.0.0 (2024-03-22)
 

buffyboard/README.md

@@ -32,6 +32,7 @@ For a growing collection of demo videos, see the [wiki].
 - [lvgl] (git submodule / linked statically)
 - [squeek2lvgl] (git submodule / linked statically)
 - [libinput]
+- [libudev]
 - evdev kernel module
 - uinput kernel module
 
@@ -129,6 +130,7 @@ The [FontAwesome] font is licensed under the Open Font License version 1.1.
 [arrow-alt-circle-up]: https://fontawesome.com/v5.15/icons/arrow-alt-circle-up?style=solid
 [fbkeyboard]: https://github.com/bakonyiferenc/fbkeyboard
 [libinput]: https://gitlab.freedesktop.org/libinput/libinput
+[libudev]: https://github.com/systemd/systemd/tree/main/src/libudev
 [lv_port_linux_frame_buffer]: https://github.com/lvgl/lv_port_linux_frame_buffer
 [lv_sim_emscripten]: https://github.com/lvgl/lv_sim_emscripten/blob/master/mouse_cursor_icon.c
 [lvgl]: https://github.com/lvgl/lvgl

buffyboard/indev.c

@@ -1,84 +0,0 @@
-/**
- * Copyright 2021 Johannes Marbach
- * SPDX-License-Identifier: GPL-3.0-or-later
- */
-
-
-#include "indev.h"
-
-#include "../shared/cursor/cursor.h"
-
-#include "lvgl/lvgl.h"
-
-#include <limits.h>
-
-
-/**
- * Defines
- */
-
-#define MAX_POINTER_DEVS 4
-#define MAX_TOUCHSCREEN_DEVS 1
-
-
-/**
- * Static variables
- */
-
-static int num_pointer_devs = 0;
-static char *pointer_devs[MAX_POINTER_DEVS];
-static lv_indev_t *pointer_indevs[MAX_POINTER_DEVS];
-
-static int num_touchscreen_devs = 0;
-static char *touchscreen_devs[MAX_TOUCHSCREEN_DEVS];
-static lv_indev_t *touchscreen_indevs[MAX_TOUCHSCREEN_DEVS];
-
-
-/**
- * Static prototypes
- */
-
-/**
- * Auto-connect available input devices having a specific capability.
- *
- * @param capability capability to filter devices by
- * @param max_num_devs maximum number of devices to connect
- * @param num_devs pointer for writing the actual number of connected devices into
- * @param devs array for storing device paths
- * @param indevs array for storing LVGL indevs
- */
-static void auto_connect(lv_libinput_capability capability, int max_num_devs, int *num_devs, char *devs[], lv_indev_t *indevs[]);
-
-
-/**
- * Static functions
- */
-
-static void auto_connect(lv_libinput_capability capability, int max_num_devs, int *num_devs, char *devs[], lv_indev_t *indevs[]) {
-    lv_memset(devs, 0, max_num_devs * sizeof(char *));
-    lv_memset(indevs, 0, max_num_devs * sizeof(lv_indev_t *));
-
-    *num_devs = lv_libinput_find_devs(capability, devs, max_num_devs, false);
-
-    for (int i = 0; i < *num_devs; ++i) {
-        indevs[i] = lv_libinput_create(capability & LV_LIBINPUT_CAPABILITY_KEYBOARD ? LV_INDEV_TYPE_KEYPAD : LV_INDEV_TYPE_POINTER, devs[i]);
-    }
-}
-
-
-/**
- * Public functions
- */
-
-void bb_indev_auto_connect() {
-    auto_connect(LV_LIBINPUT_CAPABILITY_POINTER, MAX_POINTER_DEVS, &num_pointer_devs, pointer_devs, pointer_indevs);
-    auto_connect(LV_LIBINPUT_CAPABILITY_TOUCH, MAX_TOUCHSCREEN_DEVS, &num_touchscreen_devs, touchscreen_devs, touchscreen_indevs);
-}
-
-void bb_indev_set_up_mouse_cursor() {
-    lv_obj_t *cursor_obj = lv_img_create(lv_scr_act());
-    lv_img_set_src(cursor_obj, &bb_cursor_img_dsc);
-    for (int i = 0; i < num_pointer_devs; ++i) {
-        lv_indev_set_cursor(pointer_indevs[i], cursor_obj);
-    }
-}

buffyboard/indev.h

@@ -1,20 +0,0 @@
-/**
- * Copyright 2021 Johannes Marbach
- * SPDX-License-Identifier: GPL-3.0-or-later
- */
-
-
-#ifndef BB_INDEV_H
-#define BB_INDEV_H
-
-/**
- * Auto-connect currently available keyboard, pointer and touchscreen input devices.
- */
-void bb_indev_auto_connect();
-
-/**
- * Set up the mouse cursor image for currently connected pointer devices.
- */
-void bb_indev_set_up_mouse_cursor();
-
-#endif /* BB_INDEV_H */

buffyboard/main.c

@@ -6,13 +6,13 @@
 
 #include "buffyboard.h"
 #include "command_line.h"
-#include "indev.h"
 #include "sq2lv_layouts.h"
 #include "terminal.h"
 #include "uinput_device.h"
 
 #include "lvgl/lvgl.h"
 
+#include "../shared/indev.h"
 #include "../squeek2lvgl/sq2lv.h"
 
 #include <limits.h>
@@ -279,9 +279,8 @@ int main(int argc, char *argv[]) {
         }
     }
 
-    /* Connect input devices */
-    bb_indev_auto_connect();
-    bb_indev_set_up_mouse_cursor();
+    /* Start input device monitor and auto-connect available devices */
+    bb_indev_start_monitor_and_autoconnect(false, true, true);
 
     /* Initialise theme and styles */
     set_theme(true);

buffyboard/meson.build

@@ -15,7 +15,6 @@ add_project_arguments('-DBB_VERSION="@0@"'.format(meson.project_version()), lang
 buffyboard_sources = [
   'command_line.c',
   'font_32.c',
-  'indev.c',
   'main.c',
   'sq2lv_layouts.c',
   'terminal.c',
@@ -23,7 +22,9 @@ buffyboard_sources = [
 ]
 
 shared_sources = [
-  '../shared/cursor/cursor.c'
+  '../shared/cursor/cursor.c',
+  '../shared/indev.c',
+  '../shared/log.c',
 ]
 
 squeek2lvgl_sources = [
@@ -38,6 +39,7 @@ executable(
   include_directories: ['..'],
   dependencies: [
     dependency('libinput'),
+    dependency('libudev'),
     meson.get_compiler('c').find_library('m', required: false),
   ],
   install: true

shared/indev.c

@@ -6,8 +6,8 @@
 
 #include "indev.h"
 
-#include "../shared/cursor/cursor.h"
-#include "../shared/log.h"
+#include "cursor/cursor.h"
+#include "log.h"
 
 #include "lvgl/src/indev/lv_indev_private.h"
 
@@ -361,12 +361,17 @@ static void set_mouse_cursor(struct input_device *device) {
     lv_indev_set_cursor(device->indev, cursor_obj);
 }
 
+static void query_device_monitor(lv_timer_t *timer) {
+    LV_UNUSED(timer);
+    bb_indev_query_monitor();
+}
+
 
 /**
  * Public functions
  */
 
-void ul_indev_set_allowed_device_capability(bool keyboard, bool pointer, bool touchscreen) {
+void bb_indev_set_allowed_device_capability(bool keyboard, bool pointer, bool touchscreen) {
     allowed_capability = LV_LIBINPUT_CAPABILITY_NONE;
     if (keyboard) {
         allowed_capability |= LV_LIBINPUT_CAPABILITY_KEYBOARD;
@@ -379,7 +384,7 @@ void ul_indev_set_allowed_device_capability(bool keyboard, bool pointer, bool to
     }
 }
 
-void ul_indev_set_keyboard_input_group(lv_group_t *group) {
+void bb_indev_set_keyboard_input_group(lv_group_t *group) {
     /* Store the group */
     keyboard_input_group = group;
 
@@ -391,7 +396,14 @@ void ul_indev_set_keyboard_input_group(lv_group_t *group) {
     }
 }
 
-void ul_indev_auto_connect() {
+void bb_indev_start_monitor_and_autoconnect(bool keyboard, bool pointer, bool touchscreen) {
+    bb_indev_set_allowed_device_capability(keyboard, pointer, touchscreen);
+    bb_indev_start_monitor();
+    lv_timer_create(query_device_monitor, 1000, NULL);
+    bb_indev_auto_connect();
+}
+
+void bb_indev_auto_connect() {
     bb_log(BB_LOG_LEVEL_VERBOSE, "Auto-connecting supported input devices");
 
     /* Make sure udev context is initialised */
@@ -434,7 +446,7 @@ void ul_indev_auto_connect() {
     udev_enumerate_unref(enumerate);
 }
 
-void ul_indev_start_monitor() {
+void bb_indev_start_monitor() {
     /* Make sure udev context is initialised */
     if (!context) {
         context = udev_new();
@@ -454,7 +466,7 @@ void ul_indev_start_monitor() {
     monitor = udev_monitor_new_from_netlink(context, "udev");
     if (!monitor) {
         bb_log(BB_LOG_LEVEL_WARNING, "Could not create udev monitor");
-        ul_indev_stop_monitor();
+        bb_indev_stop_monitor();
         return;
     }
 
@@ -466,19 +478,19 @@ void ul_indev_start_monitor() {
     /* Start monitor */
     if (udev_monitor_enable_receiving(monitor) < 0) {
         bb_log(BB_LOG_LEVEL_WARNING, "Could not enable udev monitor");
-        ul_indev_stop_monitor();
+        bb_indev_stop_monitor();
         return;
     }
 
     /* Obtain monitor file descriptor */
     if ((monitor_fd = udev_monitor_get_fd(monitor)) < 0) {
         bb_log(BB_LOG_LEVEL_WARNING, "Could not acquire file descriptor for udev monitor");
-        ul_indev_stop_monitor();
+        bb_indev_stop_monitor();
         return;
     }
 }
 
-void ul_indev_stop_monitor() {
+void bb_indev_stop_monitor() {
     /* Unreference monitor */
     if (monitor) {
         udev_monitor_unref(monitor);
@@ -497,7 +509,7 @@ void ul_indev_stop_monitor() {
     }
 }
 
-void ul_indev_query_monitor() {
+void bb_indev_query_monitor() {
     /* Make sure the monitor is running */
     if (!monitor) {
         bb_log(BB_LOG_LEVEL_ERROR, "Cannot query udev monitor because it is not running");
@@ -535,7 +547,7 @@ void ul_indev_query_monitor() {
     }
 }
 
-bool ul_indev_is_keyboard_connected() {
+bool bb_indev_is_keyboard_connected() {
     for (int i = 0; i < num_connected_devices; ++i) {
         if (is_keyboard_device(devices[i])) {
             return true;

shared/indev.h

@@ -4,8 +4,8 @@
  */
 
 
-#ifndef UL_INDEV_H
-#define UL_INDEV_H
+#ifndef BB_INDEV_H
+#define BB_INDEV_H
 
 #include "lvgl/lvgl.h"
 
@@ -18,40 +18,49 @@
  * @param pointer if true, allow connection of pointer devices
  * @param touchscreen if true, allow connection of touchscreen devices
  */
-void ul_indev_set_allowed_device_capability(bool keyboard, bool pointer, bool touchscreen);
+void bb_indev_set_allowed_device_capability(bool keyboard, bool pointer, bool touchscreen);
 
 /**
  * Set the group for receiving input from keyboard devices.
  * 
  * @param group group that should receive input
  */
-void ul_indev_set_keyboard_input_group(lv_group_t *group);
+void bb_indev_set_keyboard_input_group(lv_group_t *group);
+
+/**
+ * Start the udev device monitor and auto-connect currently available devices.
+ *
+ * @param keyboard if true, allow connection of keyboard devices
+ * @param pointer if true, allow connection of pointer devices
+ * @param touchscreen if true, allow connection of touchscreen devices
+ */
+void bb_indev_start_monitor_and_autoconnect(bool keyboard, bool pointer, bool touchscreen);
 
 /**
  * Auto-connect currently available keyboard, pointer and touchscreen input devices.
  */
-void ul_indev_auto_connect();
+void bb_indev_auto_connect();
 
 /**
  * Start the udev device monitor.
  */
-void ul_indev_start_monitor();
+void bb_indev_start_monitor();
 
 /**
  * Stop the udev device monitor.
  */
-void ul_indev_stop_monitor();
+void bb_indev_stop_monitor();
 
 /**
  * Query the udev device monitor and (dis)connect added or removed devices
  */
-void ul_indev_query_monitor();
+void bb_indev_query_monitor();
 
 /**
  * Check if any keyboard devices are connected.
  *
  * @return true if at least one keyboard device is connected, false otherwise
  */
-bool ul_indev_is_keyboard_connected();
+bool bb_indev_is_keyboard_connected();
 
-#endif /* UL_INDEV_H */
+#endif /* BB_INDEV_H */

unl0kr/main.c

@@ -7,12 +7,12 @@
 #include "backends.h"
 #include "command_line.h"
 #include "config.h"
-#include "indev.h"
 #include "unl0kr.h"
 #include "terminal.h"
 #include "theme.h"
 #include "themes.h"
 
+#include "../shared/indev.h"
 #include "../shared/log.h"
 #include "../squeek2lvgl/sq2lv.h"
 
@@ -54,13 +54,6 @@ lv_obj_t *keyboard = NULL;
 */
 static void *tick_thread (void *args);
 
-/**
- * Query the device monitor and handle updates.
- *
- * @param timer the timer object
- */
-static void query_device_monitor(lv_timer_t *timer);
-
 /**
  * Handle LV_EVENT_CLICKED events from the theme toggle button.
  *
@@ -216,11 +209,6 @@ static void *tick_thread (void *args) {
     return NULL;
 }
 
-static void query_device_monitor(lv_timer_t *timer) {
-    LV_UNUSED(timer);
-    ul_indev_query_monitor();
-}
-
 static void toggle_theme_btn_clicked_cb(lv_event_t *event) {
     LV_UNUSED(event);
     toggle_theme();
@@ -442,16 +430,13 @@ int main(int argc, char *argv[]) {
 
     /* Prepare for routing physical keyboard input into the textarea */
     lv_group_t *keyboard_input_group = lv_group_create();
-    ul_indev_set_keyboard_input_group(keyboard_input_group);
+    bb_indev_set_keyboard_input_group(keyboard_input_group);
 
     /* Start input device monitor and auto-connect available devices */
-    ul_indev_set_allowed_device_capability(conf_opts.input.keyboard, conf_opts.input.pointer, conf_opts.input.touchscreen);
-    ul_indev_start_monitor();
-    lv_timer_create(query_device_monitor, 1000, NULL);
-    ul_indev_auto_connect();
+    bb_indev_start_monitor_and_autoconnect(conf_opts.input.keyboard, conf_opts.input.pointer, conf_opts.input.touchscreen);
 
     /* Hide the on-screen keyboard by default if a physical keyboard is connected */
-    if (conf_opts.keyboard.autohide && ul_indev_is_keyboard_connected()) {
+    if (conf_opts.keyboard.autohide && bb_indev_is_keyboard_connected()) {
         is_keyboard_hidden = true;
     }
 

unl0kr/meson.build

@@ -17,7 +17,6 @@ unl0kr_sources = [
   'command_line.c',
   'config.c',
   'font_32.c',
-  'indev.c',
   'main.c',
   'sq2lv_layouts.c',
   'terminal.c',
@@ -27,6 +26,7 @@ unl0kr_sources = [
 
 shared_sources = [
   '../shared/cursor/cursor.c',
+  '../shared/indev.c',
   '../shared/log.c',
 ]