Major updates/cleanup.

src/internal/ui/command/command.cc

@@ -3,66 +3,6 @@
 #include "internal/parser/parser.h"
 
 namespace bed::internal::ui {
-/*template <typename F>
-static void for_each_cluster(std::string_view s, F &&f) {
-  unicode_width_state_t state;
-  unicode_width_init(&state);
-  size_t i = 0;
-  while (i < s.size()) {
-    unsigned char c = static_cast<unsigned char>(s[i]);
-    size_t bytes = 1;
-    int width = 0;
-    if (c < 128) {
-      width = unicode_width_process(&state, c);
-    } else {
-      uint_least32_t cp;
-      size_t decoded = grapheme_decode_utf8(s.data() + i, s.size() - i, &cp);
-      bytes = decoded > 0 ? decoded : 1;
-      width = unicode_width_process(&state, cp);
-    }
-    if (width < 0)
-      width = 0;
-    f(i, bytes, width);
-    i += bytes;
-  }
-}
-
-static int display_width(std::string_view s) {
-  int w = 0;
-  for_each_cluster(s, [&](size_t, size_t, int cw) { w += cw; });
-  return w;
-}
-
-static uint16_t count_clusters(std::string_view s) {
-  uint16_t n = 0;
-  for_each_cluster(s, [&](size_t, size_t, int) { ++n; });
-  return n;
-}
-
-static std::vector<uint16_t> wrap_offsets(std::string_view line, uint16_t avail) {
-  std::vector<uint16_t> offsets{0};
-  int col = 0;
-  for_each_cluster(line, [&](uint16_t i, uint16_t, int w) {
-    if (col + w > avail && col > 0) {
-      offsets.push_back(i);
-      col = 0;
-    }
-    col += w;
-  });
-  return offsets;
-}
-
-// The word under/before `byte_pos`, split on plain ASCII spaces. Used to
-// pick what prefix to hand the suggestion trie.
-// TODO: change to use libgrapheme word break here.
-static std::string current_word(const std::string &line, size_t byte_pos) {
-  size_t start = (byte_pos == 0) ? std::string::npos : line.rfind(' ', byte_pos - 1);
-  start = (start == std::string::npos) ? 0 : start + 1;
-  if (byte_pos < start)
-    byte_pos = start;
-  return line.substr(start, byte_pos - start);
-}*/
-
 CommandIO::CommandIO(BEd &bed) : bed(bed) {
   if (bed.prompt_mode)
     prompt = bed.prompt(bed);