Readline::Readline

(

const char *

prgname

)

Construct a Readline object. The constructor reads the history from a history file. The filename is compiled by adding ".his" to the supplied argument. The name oif the history file is stored in fName.

Since readline has a global namespace, the creation of only one Readline instance is allowed.

The provided program name is supplied to readline by means of rl_readline_name.

Readlines default callback frunction for completions is redirected to CompletionImp which in turn will call Completion, which can be overwritten by the user.

Bind some default key sequences like Page-up/-down for searching forward and backward in history.

Parameters

prgname

The prefix of the history filename. Usually the program name, which can be initialized by argv[0].

Definition at line 105 of file Readline.cc.

References fCommandLog, fName, rl_ncurses_completion_display(), rl_ncurses_completion_function(), rl_ncurses_event_hook(), rl_ncurses_getc(), rl_ncurses_redisplay(), rl_ncurses_startup(), and This.

Referenced by SetSection().

                                      :
    fMaxLines(500), fLine(0), fSection(-4), fLabel(-1), fCompletion(0)
{
    if (This)
    {
        cout << "ERROR - Readline can only be instatiated once!" << endl;
        exit(-1);
    }

    This = this;

    // Alternative completion function
    rl_attempted_completion_function = rl_ncurses_completion_function;

    // Program name
#if BOOST_VERSION < 104600
    static const string fname = boost::filesystem::path(prgname).filename();
#else
    static const string fname = boost::filesystem::path(prgname).filename().string();
#endif
    rl_readline_name = fname.c_str();

    // Compile filename for history file
    fName = string(prgname)+".his";

    // Read history file
    read_history(fName.c_str());
    //if (read_history(fName.c_str()))
    //    cout << "WARNING - Reading " << fName << ": " << strerror(errno) << endl;

    fCommandLog.open(string(prgname)+".evt");

    // Setup the readline callback which are needed to redirect
    // the otuput properly to our ncurses panel
    rl_getc_function                   = rl_ncurses_getc;
    rl_startup_hook                    = rl_ncurses_startup;
    rl_redisplay_function              = rl_ncurses_redisplay;
    rl_event_hook                      = rl_ncurses_event_hook;
    rl_completion_display_matches_hook = rl_ncurses_completion_display;

    // Bind delete, page up, page down
    rl_bind_keyseq("\e[1~",  rl_named_function("beginning-of-line"));
    rl_bind_keyseq("\e[3~",  rl_named_function("delete-char"));
    rl_bind_keyseq("\e[4~",  rl_named_function("end-of-line"));
    rl_bind_keyseq("\e[5~",  rl_named_function("history-search-backward"));
    rl_bind_keyseq("\e[6~",  rl_named_function("history-search-forward"));
    rl_bind_keyseq("\033[1;3F", rl_named_function("kill-line"));
    rl_bind_keyseq("\033[1;5D", rl_named_function("backward-word"));
    rl_bind_keyseq("\033[1;5C", rl_named_function("forward-word"));
    rl_bind_key(25, rl_named_function("kill-whole-line"));

    //for (int i=0; i<10; i++) cout << (int)getchar() << endl;
}

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