From 1751470785a110729afc01f3947b406bc40ceb43 Mon Sep 17 00:00:00 2001
From: Pete Johanson <peter@peterjohanson.com>
Date: Mon, 15 Jun 2020 17:03:34 -0400
Subject: Initial work on keymap transforms for non-standard matrixes.

* Allows "gaps" for keyboards like Kyra.
* Allows keyboards with matrixes that don't map the logical key
  locations to have normal looking keymaps when defined.
---
 app/src/keymap.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)

(limited to 'app/src')

diff --git a/app/src/keymap.c b/app/src/keymap.c
index 569a2cc..a1ed3ff 100644
--- a/app/src/keymap.c
+++ b/app/src/keymap.c
@@ -2,10 +2,57 @@
 #include <logging/log.h>
 LOG_MODULE_DECLARE(zmk, CONFIG_ZMK_LOG_LEVEL);
 #include <zmk/keymap.h>
+#include <dt-bindings/zmk/keymap-transform.h>
+#include <sys/util.h>
 
 static u32_t zmk_keymap_layer_state = 0;
 static u8_t zmk_keymap_layer_default = 0;
 
+#if DT_NODE_HAS_PROP(ZMK_KEYMAP_NODE, transform)
+#define ZMK_KEYMAP_TRANSFORM_NODE DT_PHANDLE(ZMK_KEYMAP_NODE, transform)
+#define ZMK_KEYMAP_LEN DT_PROP_LEN(ZMK_KEYMAP_TRANSFORM_NODE, map)
+
+#define _TRANSFORM_ENTRY(i, l) \
+	[(KT_ROW(DT_PROP_BY_IDX(ZMK_KEYMAP_TRANSFORM_NODE, map, i)) * ZMK_MATRIX_COLS) + KT_COL(DT_PROP_BY_IDX(ZMK_KEYMAP_TRANSFORM_NODE, map, i))] = DT_PROP_BY_IDX(DT_PHANDLE_BY_IDX(ZMK_KEYMAP_NODE, layers, l), keys, i),
+
+#define TRANSFORMED_LAYER(idx) \
+  { UTIL_LISTIFY(ZMK_KEYMAP_LEN, _TRANSFORM_ENTRY, idx) }
+
+static zmk_key zmk_keymap[ZMK_KEYMAP_LAYERS_LEN][ZMK_MATRIX_ROWS * ZMK_MATRIX_COLS] = {
+#if DT_PROP_HAS_IDX(ZMK_KEYMAP_NODE, layers, 0)
+	TRANSFORMED_LAYER(0),
+#endif
+#if DT_PROP_HAS_IDX(ZMK_KEYMAP_NODE, layers, 1)
+	TRANSFORMED_LAYER(1),
+#endif
+#if DT_PROP_HAS_IDX(ZMK_KEYMAP_NODE, layers, 2)
+	TRANSFORMED_LAYER(2),
+#endif
+#if DT_PROP_HAS_IDX(ZMK_KEYMAP_NODE, layers, 3)
+	TRANSFORMED_LAYER(3),
+#endif
+#if DT_PROP_HAS_IDX(ZMK_KEYMAP_NODE, layers, 4)
+	TRANSFORMED_LAYER(4),
+#endif
+#if DT_PROP_HAS_IDX(ZMK_KEYMAP_NODE, layers, 5)
+	TRANSFORMED_LAYER(5),
+#endif
+#if DT_PROP_HAS_IDX(ZMK_KEYMAP_NODE, layers, 6)
+	TRANSFORMED_LAYER(6),
+#endif
+#if DT_PROP_HAS_IDX(ZMK_KEYMAP_NODE, layers, 7)
+	TRANSFORMED_LAYER(7),
+#endif
+#if DT_PROP_HAS_IDX(ZMK_KEYMAP_NODE, layers, 8)
+	TRANSFORMED_LAYER(8),
+#endif
+#if DT_PROP_HAS_IDX(ZMK_KEYMAP_NODE, layers, 9)
+	TRANSFORMED_LAYER(9),
+#endif
+};
+
+#else
+
 static zmk_key zmk_keymap[ZMK_KEYMAP_LAYERS_LEN][ZMK_MATRIX_ROWS * ZMK_MATRIX_COLS] = {
 #if DT_PROP_HAS_IDX(ZMK_KEYMAP_NODE, layers, 0)
 	DT_PROP_BY_PHANDLE_IDX(ZMK_KEYMAP_NODE, layers, 0, keys),
@@ -33,6 +80,8 @@ static zmk_key zmk_keymap[ZMK_KEYMAP_LAYERS_LEN][ZMK_MATRIX_ROWS * ZMK_MATRIX_CO
 #endif
 };
 
+#endif
+
 #define SET_LAYER_STATE(layer, state)                \
 	if (layer >= 32)                                 \
 	{                                                \
-- 
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