189 lines
4.3 KiB
C
189 lines
4.3 KiB
C
/*
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* Copyright (c) 2017 Brian Barto
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the MIT License. See LICENSE for more details.
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*/
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/*
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* The nmstermio_ncurses modules implements the terminal interface, with
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* ncurses support, used by the nmseffect module. All terminal IO
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* functionality is defined and implemented here.
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*/
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#include <string.h>
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#include <ncurses.h>
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// Static settings
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static int clearScr = 1; // clearScr flag
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static int foregroundColor = COLOR_BLUE; // Foreground color setting
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/*
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* Initialize and configure the terminal for output. This usually means
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* just turning off terminal echo, line buffering, and clearing the screen.
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* Note that ncurses always clears the screen, so there is no option to do
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* otherwise.
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*/
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void nmstermio_init_terminal(void) {
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initscr();
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cbreak();
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noecho();
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curs_set(0);
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move(0, 0);
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if (has_colors()) {
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start_color();
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init_pair(1, foregroundColor, COLOR_BLACK);
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}
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}
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/*
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* Restore the state of the terminal to the state prior to executing
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* nmstermio_init_terminal(). This usually means turning on line buffering,
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* echo, and terminal contents.
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*/
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void nmstermio_restore_terminal(void) {
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endwin();
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}
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/*
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* Get and return the number of rows in the current terminal window.
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*/
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int nmstermio_get_rows(void) {
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return getmaxy(stdscr);
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}
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/*
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* Get and return the number of cols in the current terminal window.
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*/
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int nmstermio_get_cols(void) {
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return getmaxx(stdscr);
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}
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/*
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* Move terminal cursor to the given x/y coordinates.
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*/
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void nmstermio_move_cursor(int y, int x) {
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move(y, x);
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}
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/*
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* Print the given character string to the terminal output.
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*/
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void nmstermio_print_string(char *s) {
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addstr(s);
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}
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/*
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* Refresh the screen. Display all pending output that has not been
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* displayed yet.
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*/
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void nmstermio_refresh(void) {
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refresh();
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}
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/*
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* Clear all input pending in STDIN. This is used prior to getting user
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* input to clear the input queue in case of any prior errant keystrokes.
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*/
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void nmstermio_clear_input(void) {
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flushinp();
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}
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/*
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* Get a single character of input from the user.
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*/
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void nmstermio_get_char(void) {
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getch();
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}
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/*
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* Print the character string that represents the decrypted data. We
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* apply the bold and color attributes (if the terminal supports color)
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* to this string.
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*/
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void nmstermio_print_reveal_string(char *s, int colorOn) {
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(void) colorOn;
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(void) foregroundColor;
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// Set bold and foreground color for character reveal
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attron(A_BOLD);
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if (has_colors())
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attron(COLOR_PAIR(1));
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// print source character
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addstr(s);
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// Unset foreground color
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if (has_colors())
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attroff(COLOR_PAIR(1));
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attroff(A_BOLD);
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}
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/*
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* Display the cursor that have been turned off by nmstermio_init_terminal().
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*/
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void nmstermio_show_cursor(void) {
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curs_set(1);
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refresh();
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}
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/*
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* Make the terminal beep. Used when the returnOpts setting is set in the
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* nmseffect module.
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*/
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void nmstermio_beep(void) {
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beep();
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}
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/*
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* Return the status of the clearScr flag. This is used by the nmseffect
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* module to make certain decisions based on its value.
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*/
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int nmstermio_get_clearscr(void) {
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return clearScr;
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}
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/*
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* Sets the clearScr flag according to the true/false value of the 's' argument.
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*/
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void nmstermio_set_clearscr(int s) {
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if (s)
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clearScr = 1;
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else
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clearScr = 0;
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}
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/*
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* Set the desired foreground color of the unencrypted characters as they
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* are revealed by nmstermio_print_reveal_string(). Valid arguments are
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* "white", "yellow", "magenta", "blue", "green", "red", and "cyan".
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*/
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void nmstermio_set_foregroundcolor(char *c) {
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if(strcmp("white", c) == 0)
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foregroundColor = COLOR_WHITE;
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else if(strcmp("yellow", c) == 0)
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foregroundColor = COLOR_YELLOW;
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else if(strcmp("black", c) == 0)
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foregroundColor = COLOR_BLACK;
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else if(strcmp("magenta", c) == 0)
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foregroundColor = COLOR_MAGENTA;
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else if(strcmp("blue", c) == 0)
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foregroundColor = COLOR_BLUE;
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else if(strcmp("green", c) == 0)
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foregroundColor = COLOR_GREEN;
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else if(strcmp("red", c) == 0)
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foregroundColor = COLOR_RED;
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else if(strcmp("cyan", c) == 0)
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foregroundColor = COLOR_CYAN;
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else
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foregroundColor = COLOR_BLUE;
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}
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/*
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* Get and returns the current row position of the cursor.
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*/
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int nmstermio_get_cursor_row(void) {
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return getcury(stdscr);
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}
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