Command.cpp

#include<seq_view.h>

namespace SeqView {

    set<int> seqSetCommands(ssc, ssc + 16);

    Com ssc[] = {SCROLLUP, SCROLLDOWN, SCROLLRIGHT, SCROLLLEFT,
        SCROLLMODE, COMPAREMODE, GOTO, GOTOEND,
        COMPARETOGGLE, GOTOBEGIN, SCROLLTOP,
        SCROLLBOTTOM, NAMEWIDTH, DISPLAYMODE, SETFRAME,
        COMPARE};

    Command getCommand() {
        // Get the command followed by the parameters

        int param = 1;
        int h, w, h_, w_;
        string param_buffer = "";
        string command_buffer = "";

        bool on_param = true;
        bool on_command = false;

        getmaxyx(stdscr, h, w);
        h_ = h; w_ = w;

        // need a map/tree that matches commands to characters
        while(TRUE) {
            wchar_t ch = getch();
            //char ch = getch();

            // ESC key clears the buffers
            if(ch == 27) {
                param = 1;
                param_buffer = "";
                command_buffer = "";
                on_param = true;
                on_command = false;
                continue;
            }

            // if a non-number was pushed, convert the 
            // param_buffer to int and look for the command
            if(ch > 57 || ch < 48) {
                on_command = true;
                on_param = false;
                if(param_buffer.length())
                    param = atoi(param_buffer.c_str());
            }

            // Start by looking for numbers
            if(on_param) {
                param_buffer += ch;
            }

            // if we are looking for a command
            // check for special keyboard keys first - because those
            // often have numbers > than what char can hold
            if(on_command) {
                if(ch == KEY_DOWN) {
                    return Command(SCROLLDOWN, param);
                } else if(ch == KEY_UP) {
                    return Command(SCROLLUP, param);
                } else if(ch == KEY_LEFT) {
                    return Command(SCROLLLEFT, param);
                } else if(ch == KEY_RIGHT) {
                    return Command(SCROLLRIGHT, param);
                } else if(ch == KEY_HOME) {
                    return Command(GOTOBEGIN, param);
                } else if(ch == KEY_END) {
                    return Command(GOTOEND, param);
                } else if(ch == KEY_RESIZE) {
                    return Command(RESIZE, param);
                } else if (ch == KEY_SLEFT) {
                    return Command(NAMEWIDTH, -1);
                } else if (ch == KEY_SRIGHT) {
                    return Command(NAMEWIDTH, 0);
                }

                // if it makes sense to treat the command as a letter
                if(ch < 256) {
                    command_buffer += ch;
                    if(!command_buffer.compare("q"))
                        return Command(QUIT, param);
                    if(!command_buffer.compare("aq"))
                        return Command(ALLQUIT, param);
                    if(!command_buffer.compare("s"))
                        return Command(SCROLLMODE, param);
                    if(!command_buffer.compare("j"))
                        return Command(SCROLLDOWN, param);
                    if(!command_buffer.compare("J"))
                        return Command(SCROLLBOTTOM, param);
                    if(!command_buffer.compare("k"))
                        return Command(SCROLLUP, param);
                    if(!command_buffer.compare("K"))
                        return Command(SCROLLTOP, param);
                    if(!command_buffer.compare("h"))
                        return Command(SCROLLLEFT, param);
                    if(!command_buffer.compare("l"))
                        return Command(SCROLLRIGHT, param);
                    if(!command_buffer.compare("H"))
                        return Command(SHOWHELP, param);
                    if(!command_buffer.compare("g"))
                        return Command(GOTOBEGIN, param);
                    if(!command_buffer.compare("w")) {
                        if(param_buffer.length() == 0) {
                            param = 0;
                        }
                        return Command(CHANGEFOCUS, param);
                    }
                    if(!command_buffer.compare("W")) {
                        if(param_buffer.length() == 0) {
                            param = 0;
                        }
                        return Command(CHANGEFOCUSREV, param);
                    }
                    if(!command_buffer.compare("G")) {
                        if(param_buffer.length()) {
                            return Command(GOTO, param);
                        } else {
                            return Command(GOTOEND, param);
                        }
                    }
                    if(!command_buffer.compare("d"))
                        return Command(DISPLAYMODE, param);
                    if(!command_buffer.compare("f"))
                        return Command(SETFRAME, param);
                    if(!command_buffer.compare("n"))
                        return Command(NAMEWIDTH, param);
                    if(!command_buffer.compare(";"))
                        return Command(SPECIAL, param);
                    if(!command_buffer.compare("c"))
                        return Command(COMPARETOGGLE, param);
                }

                // if window size has changed, but not caught by KEY_RESIZE
                getmaxyx(stdscr, h, w);
                if(h != h_ || w != w_) {
                    h_ = h; w_ = w;
                    return Command(RESIZE, param);
                }

                // if no matches and more than two letters, clear the buffers
                if(command_buffer.size() > 2) {
                    param_buffer = "";
                    command_buffer = "";
                    on_command = false;
                    on_param = true;
                    param = 1;
                }
            }

        }
    }

}