Hidden Prompt by Daniel Stelzer

Version 1/210618

"Provides a simple way to hide the command prompt during long stretches of text."

Includes

* indicates included extension uses authorial modesty

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This works similarly to Command Prompt On Cue by Ron Newcomb, but is (almost) pure I7 and thus unlikely to break with new updates. The most important phrases are these:
 hide the command prompt
 This makes the command prompt invisible until the player attempts to type a command.
 hide the command prompt with implicit command (T - text)
 This is the same as the above, but supplies T instead of "wait" if the player doesn't type anything.
 show the command prompt
 If the player never interrupted, this ends the sequence.
Version 1/210618 of Hidden Prompt by Daniel Stelzer begins here.
"Provides a simple way to hide the command prompt during long stretches of text."
"inspired by Command Prompt On Cue by Ron Newcomb"
[ Fixed typo in title and added version number -- Zed Lopez ]
Include Basic Screen Effects by Emily Short.
 Include Command Preloading by Daniel Stelzer.
Section A
Hidden prompt is initially false.
 The implicit hidden-prompt command is initially "wait".
 The former prompt is initially "".
To say (X - number) as a key: (- print (char) {X}; -).
The hidden-prompt signal is initially "[close bracket] ".
Rule for reading a command when hidden prompt is true (this is the hidden prompt command rule):
    say "[italic type][implicit hidden-prompt command][roman type][line break]";
    change the text of the player's command to the implicit hidden-prompt command.
Section B1 (for use with Command Modification by Daniel Stelzer)
To hide the command prompt:
    if the command override queue is not empty, stop;
    if hidden prompt is true, stop;
    now the former prompt is the command prompt;
    now the command prompt is the hidden-prompt signal;
    now hidden prompt is true.
 To hide the command prompt with implicit command (T - text):
    if the command override queue is not empty, stop;
    if hidden prompt is true, stop;
    now the implicit hidden-prompt command is T;
    hide the command prompt.
 To show the command prompt:
    if the command override queue is not empty, stop;
    if hidden prompt is false, stop;
    now the command prompt is the former prompt;
    now hidden prompt is false.
Section B2 (for use without Command Modification by Daniel Stelzer)
To hide the command prompt:
    if hidden prompt is true, stop;
    now the former prompt is the command prompt;
    now the command prompt is the hidden-prompt signal;
    now hidden prompt is true.
 To hide the command prompt with implicit command (T - text):
    if hidden prompt is true, stop;
    now the implicit hidden-prompt command is T;
    hide the command prompt.
 To show the command prompt:
    if hidden prompt is false, stop;
    now the command prompt is the former prompt;
    now hidden prompt is false.
Section C1 (for use with Command Preloading by Daniel Stelzer)
Before reading a command when hidden prompt is true (this is the hidden prompt interruption rule):
    say "[hidden-prompt signal][run paragraph on]";
    let X be the chosen letter;
    unless X is 13 or X is 31 or X is 32 or X is -6 or X is 127:
      preload the command "[X as a key]";
      now the command prompt is the former prompt;
      now hidden prompt is false.
Section C2 (for use without Command Preloading by Daniel Stelzer)
The saved first letter is initially "".
Before reading a command when hidden prompt is true (this is the hidden prompt interruption rule):
    say "[hidden-prompt signal][run paragraph on]";
    let X be the chosen letter;
    unless X is 13 or X is 31 or X is 32 or X is -6 or X is 127:
      now the saved first letter is "[X as a key]";
      now the command prompt is "[former prompt][saved first letter]";
      now hidden prompt is false.
Rule for printing a parser error when the latest parser error is I beg your pardon error and the saved first letter is not empty (this is the hidden prompt single-letter command failure rule):
    now the command prompt is the former prompt;
    now the saved first letter is "".
First after reading a command when hidden prompt is false and the saved first letter is not empty (this is the hidden prompt correct first keystroke rule):
    now the command prompt is the former prompt;
    change the text of the player's command to "[saved first letter][player's command]";
    [say "(changed to [player's command])[command clarification break]";]
    now the saved first letter is "".
Hidden Prompt ends here.