From 385c9d62a5507d901ff7e54d7a4c0342cf3aff43 Mon Sep 17 00:00:00 2001
From: Albert Cervin <albert@acervin.com>
Date: Sun, 15 Jan 2023 23:07:37 +0100
Subject: Lots of fixes for rendering, utf-8 and kbd.

---
 src/keyboard.c | 61 +++++++++++++++++++++++++++++++++++++---------------------
 1 file changed, 39 insertions(+), 22 deletions(-)

(limited to 'src/keyboard.c')

diff --git a/src/keyboard.c b/src/keyboard.c
index e2cdc34..03d0bd4 100644
--- a/src/keyboard.c
+++ b/src/keyboard.c
@@ -23,42 +23,56 @@ struct keyboard keyboard_create(struct reactor *reactor) {
       .reactor_event_id =
           reactor_register_interest(reactor, STDIN_FILENO, ReadInterest),
       .has_data = false,
-      .last_key = {0},
   };
 }
 
 void parse_keys(uint8_t *bytes, uint32_t nbytes, struct key *out_keys,
-                uint32_t *out_nkeys, struct key *previous_key) {
+                uint32_t *out_nkeys) {
   uint32_t nkps = 0;
-  struct key *prevkp = previous_key;
   for (uint32_t bytei = 0; bytei < nbytes; ++bytei) {
     uint8_t b = bytes[bytei];
 
-    struct key *kp = &out_keys[nkps];
-    kp->start = bytei;
-
-    bool inserted = true;
     if (b == 0x1b) { // meta
-      kp->mod |= Meta;
+      struct key *kp = &out_keys[nkps];
+      kp->start = bytei;
+      kp->mod = Meta;
+    } else if (b == '[' ||
+               b == '0') { // special char (function keys, pgdn, etc)
+      struct key *kp = &out_keys[nkps];
+      if (kp->mod & Meta) {
+        kp->mod = Spec;
+      }
     } else if (b >= 0x00 && b <= 0x1f) { // ctrl char
+      struct key *kp = &out_keys[nkps];
       kp->mod |= Ctrl;
       kp->key = b | 0x40;
-    } else if (b == 0x7f) { // ^?
+      kp->start = bytei;
+      kp->end = bytei + 1;
+      ++nkps;
+    } else if (b == 0x7f) { // ?
+      struct key *kp = &out_keys[nkps];
       kp->mod |= Ctrl;
       kp->key = '?';
-    } else if (prevkp->mod & Meta) {
-      prevkp->key = b;
-      prevkp->end = bytei + 1;
-      inserted = false;
-    } else {
-      inserted = false;
-    }
-
-    kp->end = bytei + 1;
-
-    if (inserted) {
+      kp->start = bytei;
+      kp->end = bytei + 1;
       ++nkps;
-      prevkp = kp;
+    } else {
+      struct key *kp = &out_keys[nkps];
+      if (kp->mod & Spec && b == '~') {
+        // skip tilde in special chars
+        kp->end = bytei + 1;
+        ++nkps;
+      } else if (kp->mod & Meta || kp->mod & Spec) {
+        kp->key = b;
+        kp->end = bytei + 1;
+
+        bool has_more = bytei + 1 < nbytes;
+
+        if (kp->mod & Meta ||
+            (kp->mod & Spec && !(has_more && bytes[bytei + 1] == '~'))) {
+          ++nkps;
+        }
+      }
     }
   }
 
@@ -87,7 +101,7 @@ struct keyboard_update keyboard_update(struct keyboard *kbd,
 
   if (nbytes > 0) {
     upd.nbytes = nbytes;
-    parse_keys(upd.raw, upd.nbytes, upd.keys, &upd.nkeys, &kbd->last_key);
+    parse_keys(upd.raw, upd.nbytes, upd.keys, &upd.nkeys);
 
     if (nbytes < 32) {
       kbd->has_data = false;
@@ -116,6 +130,9 @@ void key_name(struct key *key, char *buf, size_t capacity) {
   case Meta:
     mod = "m-";
     break;
+  case Spec:
+    mod = "special-";
+    break;
   }
 
   snprintf(buf, capacity, "%s%c", mod, tolower(key->key));
-- 
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