terminal: add xkb-based keyboard devices to idev

The idev-keyboard object provides keyboard devices to the idev interface.
It uses libxkbcommon to provide proper keymap support.

So far, the keyboard implementation is pretty straightforward with one
keyboard device per matching evdev element. We feed everything into the
system keymap and provide proper high-level keyboard events to the
application. Compose-features and IM need to be added later.

1 files changed, 49 insertions, 0 deletions

diff --git a/src/libsystemd-terminal/idev.h b/src/libsystemd-terminal/idev.h
index c98fb1bfb0..0ae044cfd5 100644
--- a/src/libsystemd-terminal/idev.h
+++ b/src/libsystemd-terminal/idev.h
@@ -32,10 +32,12 @@
 #include <stdlib.h>
 #include <systemd/sd-bus.h>
 #include <systemd/sd-event.h>
+#include <xkbcommon/xkbcommon.h>
 #include "util.h"
 
 typedef struct idev_data                idev_data;
 typedef struct idev_data_evdev          idev_data_evdev;
+typedef struct idev_data_keyboard       idev_data_keyboard;
 
 typedef struct idev_event               idev_event;
 typedef struct idev_device              idev_device;
@@ -52,6 +54,7 @@ enum {
 };
 
 enum {
+        IDEV_DEVICE_KEYBOARD,
         IDEV_DEVICE_CNT
 };
 
@@ -64,12 +67,57 @@ struct idev_data_evdev {
 };
 
 /*
+ * Keyboard Devices
+ */
+
+struct xkb_state;
+
+enum {
+        IDEV_KBDMOD_IDX_SHIFT,
+        IDEV_KBDMOD_IDX_CTRL,
+        IDEV_KBDMOD_IDX_ALT,
+        IDEV_KBDMOD_IDX_LINUX,
+        IDEV_KBDMOD_IDX_CAPS,
+        IDEV_KBDMOD_CNT,
+
+        IDEV_KBDMOD_SHIFT               = 1 << IDEV_KBDMOD_IDX_SHIFT,
+        IDEV_KBDMOD_CTRL                = 1 << IDEV_KBDMOD_IDX_CTRL,
+        IDEV_KBDMOD_ALT                 = 1 << IDEV_KBDMOD_IDX_ALT,
+        IDEV_KBDMOD_LINUX               = 1 << IDEV_KBDMOD_IDX_LINUX,
+        IDEV_KBDMOD_CAPS                = 1 << IDEV_KBDMOD_IDX_CAPS,
+};
+
+enum {
+        IDEV_KBDLED_IDX_NUM,
+        IDEV_KBDLED_IDX_CAPS,
+        IDEV_KBDLED_IDX_SCROLL,
+        IDEV_KBDLED_CNT,
+
+        IDEV_KBDLED_NUM                 = 1 << IDEV_KBDLED_IDX_NUM,
+        IDEV_KBDLED_CAPS                = 1 << IDEV_KBDLED_IDX_CAPS,
+        IDEV_KBDLED_SCROLL              = 1 << IDEV_KBDLED_IDX_SCROLL,
+};
+
+struct idev_data_keyboard {
+        struct xkb_state *xkb_state;
+        int8_t ascii;
+        uint8_t value;
+        uint16_t keycode;
+        uint32_t mods;
+        uint32_t consumed_mods;
+        uint32_t n_syms;
+        uint32_t *keysyms;
+        uint32_t *codepoints;
+};
+
+/*
  * Data Packets
  */
 
 enum {
         IDEV_DATA_RESYNC,
         IDEV_DATA_EVDEV,
+        IDEV_DATA_KEYBOARD,
         IDEV_DATA_CNT
 };
 
@@ -79,6 +127,7 @@ struct idev_data {
 
         union {
                 idev_data_evdev evdev;
+                idev_data_keyboard keyboard;
         };
 };