Compose file loading

firmware2/Cargo.lock

@@ -37,6 +37,7 @@ dependencies = [
  "mutually_exclusive_features",
  "panic-rtt-target",
  "paste",
+ "printf-compat",
  "rand_core 0.6.4",
  "rmk",
  "rtt-target",
@@ -5581,6 +5582,16 @@ dependencies = [
  "elliptic-curve",
 ]
 
+[[package]]
+name = "printf-compat"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4ccd7bb33c3c13016f1315e4e4c6ad1d0021ce575b1e254868f4330eab99e1b6"
+dependencies = [
+ "bitflags 2.10.0",
+ "itertools 0.14.0",
+]
+
 [[package]]
 name = "proc-macro-crate"
 version = "3.4.0"

firmware2/Cargo.toml

@@ -74,12 +74,13 @@ cfg-if = "1.0.4"
 xkbcommon = { path = "../../../rust/xkbcommon-rs-ffi", default-features = false, features = ["tinyrlibc"] }
 rtt-target = { version = "0.6.2", features = ["log"], optional = true }
 panic-rtt-target = { version = "0.2.0", optional = true }
+enumset = "1.1.10"
+printf-compat = { version = "0.2.1", default-features = false }
 
 # Crates for serial UART CLI
 embedded-cli = { version = "0.2.1", default-features = false, features = ["help", "macros"] }
 embedded-io = "0.6.1"
 mutually_exclusive_features = "0.1.0"
-enumset = "1.1.10"
 
 [build-dependencies]
 xz2 = "0.1.7"

firmware2/src/ffi/inout/mod.rs

@@ -3,11 +3,19 @@
 
 #![allow(unused_variables)]
 
-use core::ffi::{VaList, c_char, c_int, c_long, c_size_t, c_void};
+use core::{
+    ffi::{CStr, VaList, c_char, c_int, c_long, c_size_t, c_void},
+    ptr::null_mut,
+};
 
-use log::info;
+use alloc::string::String;
+use log::{info, warn};
+use printf_compat::output::fmt_write;
 
-use crate::ffi::inout::file::{FILE, STDERR, STDOUT};
+use crate::ffi::{
+    inout::file::{FILE, STDERR, STDOUT},
+    string::__xkbc_memcpy,
+};
 
 pub mod dir;
 pub mod file;
@@ -16,7 +24,11 @@ pub mod file;
 
 #[unsafe(no_mangle)]
 pub unsafe extern "C" fn __xkbc_fopen(filename: *const c_char, mode: *const c_char) -> *mut FILE {
-    todo!()
+    warn!(
+        "The xkbcommon library is attempting to open a file at path: {:?}",
+        unsafe { CStr::from_ptr(filename) }
+    );
+    null_mut()
 }
 
 #[unsafe(no_mangle)]
@@ -62,7 +74,12 @@ pub unsafe extern "C" fn __xkbc_vfprintf(
     ap: VaList,
 ) -> c_int {
     if stream == STDOUT || stream == STDERR {
-        let string = ::alloc::format!("vfprintf({:?}, {:?}, {:?})", stream, format, ap);
+        let string = ::alloc::format!(
+            "vfprintf({:?}, {:?}, {:?})",
+            stream,
+            unsafe { CStr::from_ptr(format) },
+            ap
+        );
         info!("{}", string);
         string.len() as c_int
     } else {
@@ -79,22 +96,50 @@ pub unsafe extern "C" fn __xkbc_vasprintf(
     todo!()
 }
 
+// FIXME/TODO: This shouldn't be necessary. We need to rename the symbol in libxkbcommon.a(src_compose_state.c.o).
 #[unsafe(no_mangle)]
-pub unsafe extern "C" fn __xkbc_vsnprintf(
+pub unsafe extern "C" fn snprintf(
     string: *mut c_char,
     size: c_size_t,
     format: *const c_char,
-    ap: VaList,
+    mut args: ...
 ) -> c_int {
-    todo!()
+    unsafe { __xkbc_vsnprintf(string, size, format, args.as_va_list()) }
 }
 
 #[unsafe(no_mangle)]
 pub unsafe extern "C" fn __xkbc_snprintf(
-    s: *mut c_char,
-    n: c_size_t,
+    string: *mut c_char,
+    size: c_size_t,
     format: *const c_char,
-    ...
+    mut args: ...
 ) -> c_int {
-    todo!()
+    unsafe { __xkbc_vsnprintf(string, size, format, args.as_va_list()) }
+}
+
+#[unsafe(no_mangle)]
+pub unsafe extern "C" fn __xkbc_vsnprintf(
+    string: *mut c_char,
+    // Length in bytes **including the terminating null byte**.
+    size: c_size_t,
+    format: *const c_char,
+    ap: VaList,
+) -> c_int {
+    if size == 0 {
+        return 0;
+    }
+
+    let mut rust_buffer = String::new();
+    unsafe {
+        printf_compat::format(format, ap, fmt_write(&mut rust_buffer));
+        let string_length = core::cmp::min(rust_buffer.len(), size - 1);
+        // __xkbc_strncpy would be preferrable, if it was available
+        __xkbc_memcpy(
+            string as *mut _,
+            rust_buffer.as_ptr() as *mut _,
+            string_length,
+        );
+        *string.add(string_length) = 0; // Add terminating null byte.
+        string_length as c_int
+    }
 }

firmware2/src/main.rs

@@ -61,7 +61,7 @@ use slint::ComponentHandle;
 use slint::platform::software_renderer::Rgb565Pixel;
 use static_cell::StaticCell;
 use ui::AppWindow;
-use xkbcommon::xkb::{self, KeyDirection};
+use xkbcommon::xkb::{self, KeyDirection, ModIndex};
 use {esp_alloc as _, esp_backtrace as _};
 
 use crate::matrix::IoeMatrix;
@@ -418,7 +418,7 @@ async fn main(_spawner: Spawner) {
             Box::from_raw_in(slice as *mut str, &PSRAM_ALLOCATOR)
         };
         let context = xkb::Context::new(xkb::CONTEXT_NO_FLAGS);
-        info!("Parsing XKB keymap...");
+        info!("Loading XKB keymap...");
         let instant_start = Instant::now();
         let keymap = xkb::Keymap::new_from_string(
             &context,
@@ -429,18 +429,40 @@ async fn main(_spawner: Spawner) {
         .unwrap();
         let duration = Instant::now().duration_since(instant_start);
         info!(
-            "XKB keymap parsed successfully! Took {seconds}.{millis:03} seconds.",
+            "XKB keymap loaded successfully! Took {seconds}.{millis:03} seconds.",
+            seconds = duration.as_secs(),
+            millis = duration.as_millis() % 1_000
+        );
+        info!("Loading XKB compose map...");
+        let instant_start = Instant::now();
+        const COMPOSE_MAP_STRING: &str = include_str!("../compose/cs_CZ Compose.txt");
+        const COMPOSE_MAP_LOCALE: &str = "cs_CZ.UTF-8";
+        let compose_table = xkb::compose::Table::new_from_buffer(
+            &context,
+            COMPOSE_MAP_STRING,
+            COMPOSE_MAP_LOCALE,
+            xkb::compose::FORMAT_TEXT_V1,
+            xkb::compose::COMPILE_NO_FLAGS,
+        )
+        .unwrap();
+        let duration = Instant::now().duration_since(instant_start);
+        info!(
+            "XKB compose map loaded successfully! Took {seconds}.{millis:03} seconds.",
             seconds = duration.as_secs(),
             millis = duration.as_millis() % 1_000
         );
         let mut state = xkb::State::new(&keymap);
         let mut previous_state = KeyboardReport::default();
+        let mut compose_state =
+            xkb::compose::State::new(&compose_table, xkb::compose::STATE_NO_FLAGS);
 
         async move {
             loop {
                 let report = KEYBOARD_REPORT_PROXY.receive().await;
 
                 if let Report::KeyboardReport(report) = &report {
+                    warn!("MODIFIERS = {:02x}", report.modifier);
+                    const RMK_ALT: u8 = 0xE2;
                     // TODO: Process modifiers
 
                     for (keycode_old, &keycode_new) in
@@ -491,15 +513,21 @@ async fn main(_spawner: Spawner) {
                         if *keycode_old == 0 || ((keycode_new != 0) && *keycode_old != keycode_new)
                         {
                             let keycode_new_xkb = into_xkb_keycode(keycode_new);
-                            let string = state.key_get_utf8(keycode_new_xkb);
+                            let syms = state.key_get_syms(keycode_new_xkb);
+
+                            for sym in syms {
+                                compose_state.feed(*sym);
+                            }
+
+                            let string = compose_state.utf8();
 
                             warn!("Pressed: 0x{:02x} ({})", keycode_new, keycode_new);
-                            warn!("Print: {string}");
+                            warn!("Syms: {syms:?}");
+                            warn!("String: {string:?}");
 
                             state.update_key(keycode_new_xkb, KeyDirection::Down);
                         }
 
-                        // state.update_key(keycode, direction);
                         *keycode_old = keycode_new;
                     }
                 }