path: root/cpp/070display

//: Text-mode cursor primitives. Currently thin wrappers around ncurses calls.
//: Mu starts out at the 'console' where lines wrap and scrolling is
//: automatic, where keys aren't read until pressing <enter>.
//: This file provides mechanisms for opening a 'display' and taking raw
//: charge of the cursor and keyboard.

:(before "End Includes")
#include<ncurses.h>

//:: Display management

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SWITCH_TO_DISPLAY,
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Recipe_number["switch-to-display"] = SWITCH_TO_DISPLAY;
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case SWITCH_TO_DISPLAY: {
  initscr();
  break;
}

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RETURN_TO_CONSOLE,
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Recipe_number["return-to-console"] = RETURN_TO_CONSOLE;
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case RETURN_TO_CONSOLE: {
  endwin();
  break;
}

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CLEAR_DISPLAY,
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Recipe_number["clear-display"] = CLEAR_DISPLAY;
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case CLEAR_DISPLAY: {
  clear();
  break;
}

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CLEAR_LINE_ON_DISPLAY,
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Recipe_number["clear-line-on-display"] = CLEAR_LINE_ON_DISPLAY;
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case CLEAR_LINE_ON_DISPLAY: {
  clrtoeol();
  break;
}

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PRINT_CHARACTER_TO_DISPLAY,
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Recipe_number["print-character-to-display"] = PRINT_CHARACTER_TO_DISPLAY;
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case PRINT_CHARACTER_TO_DISPLAY: {
  vector<int> arg = read_memory(instructions[pc].ingredients[0]);
  addch(arg[0]);
  break;
}

:(before "End Primitive Recipe Declarations")
CURSOR_POSITION_ON_DISPLAY,
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Recipe_number["cursor-position-on-display"] = CURSOR_POSITION_ON_DISPLAY;
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case CURSOR_POSITION_ON_DISPLAY: {
  size_t cursor_row = 0, cursor_column = 0;
  getyx(stdscr, cursor_row, cursor_column);
  vector<int> row;
  row.push_back(cursor_row);
  write_memory(instructions[pc].products[0], row);
  vector<int> column;
  column.push_back(cursor_column);
  write_memory(instructions[pc].products[1], column);
  break;
}

:(before "End Primitive Recipe Declarations")
MOVE_CURSOR_ON_DISPLAY,
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Recipe_number["move-cursor-on-display"] = MOVE_CURSOR_ON_DISPLAY;
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case MOVE_CURSOR_ON_DISPLAY: {
  vector<int> row = read_memory(instructions[pc].ingredients[0]);
  vector<int> column = read_memory(instructions[pc].ingredients[1]);
  move(row[0], column[0]);
  break;
}

//:: Keyboard management

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WAIT_FOR_KEY_FROM_KEYBOARD,
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Recipe_number["wait-for-key-from-keyboard"] = WAIT_FOR_KEY_FROM_KEYBOARD;
:(before "End Primitive Recipe Implementations")
case WAIT_FOR_KEY_FROM_KEYBOARD: {
  getch();
  break;
}