When a character is sent to the screen, calculate and save its script

A character is sent once, and rendered many times, so this is the best
place for the calculation, though it is used only when rendering.

src/Screen.cpp

@@ -1246,6 +1246,14 @@ notcombine:
     if (Character::emojiPresentation(c)) {
         currentChar.flags |= EF_EMOJI_REPRESENTATION;
     }
+    if (c <= '~' && c > ' ') {
+        currentChar.flags |= EF_ASCII_WORD;
+    }
+    if (c >= 0x900
+        && (c <= 0x109f || (c >= 0x1700 && c <= 0x18af) || (c >= 0x1900 && c <= 0x1aaf) || (c >= 0xa800 && c <= 0xa82f) || (c >= 0xa840 && c <= 0xa95f)
+            || (c >= 0xa980 && c <= 0xaaff) || (c >= 0xabc0 && c <= 0xabff) || (c >= 0x10a00 && c <= 0x10a5f) || (c >= 0x11000 && c <= 0x11fff))) {
+        currentChar.flags |= EF_BRAHMIC_WORD;
+    }
 
     _lastDrawnChar = c;
 

src/characters/Character.h

@@ -120,6 +120,8 @@ const ExtraFlags EF_REPL_OUTPUT  = (3 << 1);
 const ExtraFlags EF_UNDERLINE_COLOR = (15 << 3);
 const ExtraFlags EF_UNDERLINE_COLOR_1 = (1 << 3);
 const ExtraFlags EF_EMOJI_REPRESENTATION = (1 << 7);
+const ExtraFlags EF_ASCII_WORD = (1 << 8);
+const ExtraFlags EF_BRAHMIC_WORD = (1 << 9);
 
 #define SetULColor(f, m) (((f) & ~EF_UNDERLINE_COLOR) | ((m) * EF_UNDERLINE_COLOR_1))
 #define setRepl(f, m) (((f) & ~EF_REPL) | ((m) * EF_REPL_PROMPT))