Function search

lib/internal/repl/utils.js:565–621

()

  }

  function search() {
    // Just print an empty line in case the user removed the search parameter.
    if (input === '') {
      print(repl.line, `${labels[dir]}_`);
      return;
    }
    // Fix the bounds in case the direction has changed in the meanwhile.
    if (dir === 'r') {
      if (historyIndex < 0) {
        historyIndex = 0;
      }
    } else if (historyIndex >= repl.history.length) {
      historyIndex = repl.history.length - 1;
    }
    // Check the history entries until a match is found.
    while (historyIndex >= 0 && historyIndex < repl.history.length) {
      let entry = repl.history[historyIndex];
      // Visualize all potential matches only once.
      if (alreadyMatched.has(entry)) {
        historyIndex += dir === 'r' ? 1 : -1;
        continue;
      }
      // Match the next entry either from the start or from the end, depending
      // on the current direction.
      if (dir === 'r') {
        // Update the cursor in case it's necessary.
        if (cursor === -1) {
          cursor = entry.length;
        }
        cursor = StringPrototypeLastIndexOf(entry, input, cursor - 1);
      } else {
        cursor = StringPrototypeIndexOf(entry, input, cursor + 1);
      }
      // Match not found.
      if (cursor === -1) {
        goToNextHistoryIndex();
      // Match found.
      } else {
        if (repl.useColors) {
          const start = StringPrototypeSlice(entry, 0, cursor);
          const end = StringPrototypeSlice(entry, cursor + input.length);
          entry = `${start}\x1B[4m${input}\x1B[24m${end}`;
        }
        print(entry, `${labels[dir]}${input}_`, cursor);
        lastMatch = historyIndex;
        lastCursor = cursor;
        // Explicitly go to the next history item in case no further matches are
        // possible with the current entry.
        if ((dir === 'r' && cursor === 0) ||
            (dir === 's' && entry.length === cursor + input.length)) {
          goToNextHistoryIndex();
        }
        return;
      }
    }
    print(repl.line, `failed-${labels[dir]}${input}_`);
  }