Move some common matrix code to a common location (#7699)

* Move some common matrix code to a common location

* Refactor some 'custom_matrix_helper' logic to use custom matrix lite

* Fix build for kinesis/stapelberg - abuse of vpath was picking up matrix.c from core when custom matrix was enabled

* Add validation for CUSTOM_MATRIX

1 files changed, 59 insertions, 0 deletions

diff --git a/quantum/matrix_common.c b/quantum/matrix_common.c
new file mode 100644
index 000000000..22704e8ee
--- /dev/null
+++ b/quantum/matrix_common.c
@@ -0,0 +1,59 @@
+#include "matrix.h"
+#include "debounce.h"
+#include "print.h"
+#include "debug.h"
+
+// user-defined overridable functions
+
+__attribute__((weak)) void matrix_init_kb(void) { matrix_init_user(); }
+
+__attribute__((weak)) void matrix_scan_kb(void) { matrix_scan_user(); }
+
+__attribute__((weak)) void matrix_init_user(void) {}
+
+__attribute__((weak)) void matrix_scan_user(void) {}
+
+// helper functions
+
+inline uint8_t matrix_rows(void) { return MATRIX_ROWS; }
+
+inline uint8_t matrix_cols(void) { return MATRIX_COLS; }
+
+// Deprecated.
+bool matrix_is_modified(void) {
+    if (debounce_active()) return false;
+    return true;
+}
+
+#if (MATRIX_COLS <= 8)
+#    define print_matrix_header() print("\nr/c 01234567\n")
+#    define print_matrix_row(row) print_bin_reverse8(matrix_get_row(row))
+#    define matrix_bitpop(row) bitpop(matrix_get_row(row))
+#elif (MATRIX_COLS <= 16)
+#    define print_matrix_header() print("\nr/c 0123456789ABCDEF\n")
+#    define print_matrix_row(row) print_bin_reverse16(matrix_get_row(row))
+#    define matrix_bitpop(row) bitpop16(matrix_get_row(row))
+#elif (MATRIX_COLS <= 32)
+#    define print_matrix_header() print("\nr/c 0123456789ABCDEF0123456789ABCDEF\n")
+#    define print_matrix_row(row) print_bin_reverse32(matrix_get_row(row))
+#    define matrix_bitpop(row) bitpop32(matrix_get_row(row))
+#endif
+
+void matrix_print(void) {
+    print_matrix_header();
+
+    for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
+        phex(row);
+        print(": ");
+        print_matrix_row(row);
+        print("\n");
+    }
+}
+
+uint8_t matrix_key_count(void) {
+    uint8_t count = 0;
+    for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+        count += matrix_bitpop(i);
+    }
+    return count;
+}