[Keymap] userspace and keymap for rupa (#9786)

* first iteration of my keymap

* * move to userspace
* "script" modes
* keymap bling

* OM and RUPA keys

and tryin to micro-optimize in process_records.c

* woops

swap shifted rupas
forgot to add codepoint for OM

* Apply suggestions from code review

Co-authored-by: Drashna Jaelre <drashna@live.com>

* add call to process_record_keymap, per review

* fall through to process_record_keymap

* license headers

Co-authored-by: Drashna Jaelre <drashna@live.com>

1 files changed, 49 insertions, 0 deletions

diff --git a/users/rupa/rupa.c b/users/rupa/rupa.c
new file mode 100755
index 0000000000..60fec3caf0
--- /dev/null
+++ b/users/rupa/rupa.c
@@ -0,0 +1,49 @@
+/*
+Copyright 2020 rupa <rupa@lrrr.us> @rupa
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <print.h>
+#include "rupa.h"
+
+// https://en.wikipedia.org/wiki/Mathematical_Alphanumeric_Symbols
+font_t script_bold = {0x1D4D0, 0x1D4EA, 0x1D7CE}; // with bold numbers
+font_t fraktu_bold = {0x1D56C, 0x1D586, 0x1D7D8}; // with doublestruck numbers
+font_t monosp_bold = {0x1D670, 0x1D68A, 0x1D7F6};
+
+// Maps A-Z, a-z, and 0-9 to other unicode ranges. We also map space to EN
+// SPACE for some reason :)
+uint32_t map_alnum(font_t *f, bool is_shifted, uint32_t keycode) {
+    switch (keycode) {
+        case KC_SPACE:
+            return (is_shifted ? 0 : 0x2002); // EN SPACE
+        case KC_0:
+            return (is_shifted ? 0 : f->zero_glyph);
+        case KC_A ... KC_Z:
+            return (is_shifted ? f->upper_alpha : f->lower_alpha) + keycode - KC_A;
+        case KC_1 ... KC_9:
+            return (is_shifted ? 0 : f->zero_glyph + keycode - KC_1 + 1);
+        default:
+            return 0;
+    }
+}
+
+bool script_mode_translate(font_t *translator, bool is_shifted, uint32_t keycode) {
+    uint32_t translated = map_alnum(translator, is_shifted, keycode);
+    if (translated == 0) return true;
+    dprintf("script_mode_translate: %u => %d\n", keycode, translated);
+    register_unicode(translated);
+    return false;
+}