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#if OS == .WINDOWS {
#load "windows.jai";
} else #if (OS == .LINUX) || (OS == .MACOS) {
#load "unix.jai";
} else {
#assert(false, "Unsupported OS.");
}
#import "Basic";
#import "String";
Drawings :: struct {
CornerBR :: "\x6A";
CornerTR :: "\x6B";
CornerTL :: "\x6C";
CornerBL :: "\x6D";
Cross :: "\x6E";
LineH :: "\x71";
TeeL :: "\x74";
TeeR :: "\x75";
TeeB :: "\x76";
TeeT :: "\x77";
LineV :: "\x78";
Blank :: "\x5F";
Diamond :: "\x60";
Checkerboard :: "\x61";
PlusMinus :: "\x67";
LessThanOrEqual :: "\x79";
GreaterThanOrEqual :: "\x7A";
Pi :: "\x7B";
NotEqual :: "\x7C";
CenteredDot :: "\x7E";
}
Commands :: struct {
EnterAlternateBuffer :: "\e[?1049h";
EnterMainBuffer :: "\e[?1049l";
EnterDrawingMode :: "\e(0";
EnterNormalMode :: "\e(B";
ClearScreen :: "\e[2J";
ClearLine :: "\e[2K";
RefreshWindow :: "\e[7t"; // TODO Not yet tested.
SetUTF8 :: "\e%G"; // TODO TEST ME PLEASE
// Cursor Position
SetCursorPosition :: "\e[%;%H";
// Cursor Visibility
ShowCursor :: "\e[?25h";
HideCursor :: "\e[?25l";
StartBlinking :: "\e[?25h]";
StopBlinking :: "\e[?25l]";
SaveCursorPosition :: "\e7";
RestoreCursorPosition :: "\e8";
// Cursor Shape
DefaultShape :: "\e[0 q";
BlinkingBlockShape :: "\e[1 q";
SteadyBlockShape :: "\e[2 q";
BlinkingUnderlineShape :: "\e[3 q";
SteadyUnderlineShape :: "\e[4 q";
BlinkingBarShape :: "\e[5 q";
SteadyBarShape :: "\e[6 q";
// Input Mode
KeypadAppMode :: "\e=";
KeypadNumMode :: "\e>";
CursorAppMode :: "\e[?1h";
CursorNormalMode :: "\e[?1l";
// Query State
QueryCursorPosition :: "\e[6n"; // Emits the cursor position as: "ESC [ <r> ; <c> R" Where <r> = row and <c> = column.
QueryDeviceAttributes :: "\e[0c";
QueryWindowSizeInChars :: "\e[18t"; // Emits the window size as: "ESC [ 8 <r> ; <c> t" Where <r> = row and <c> = column. TODO Does not work on windows.
}
// TODO Maybe make the OS_* procedures as inline?!
initialized := false;
start :: () {
if initialized return;
write_strings(Commands.HideCursor, Commands.SaveCursorPosition, Commands.EnterAlternateBuffer, Commands.SetUTF8);
OS_prepare_terminal();
initialized = true;
}
stop :: () {
if initialized == false return;
initialized = false;
OS_reset_terminal();
write_strings(Commands.EnterMainBuffer, Commands.RestoreCursorPosition, Commands.ShowCursor);
}
draw_box :: (x: int, y: int, width: int, height: int) {
// TODO Check if using a String_Builder improves performance (measure it)!
// TODO Validate input parameters against the terminal size.
assert(x > 0 && y > 0 && width > 1 && height > 1, "Invalid arguments.");
auto_release_temp();
tmp_string: string;
tmp_string = tprint(Commands.SetCursorPosition, y, x);
write_strings(
Commands.EnterDrawingMode,
tmp_string,
Drawings.CornerTL
);
for 1..width-2 {
write_string(Drawings.LineH);
}
write_string(Drawings.CornerTR);
for idx: y+1..y+height-2 {
tmpL := tprint(Commands.SetCursorPosition, idx, x);
tmpR := tprint(Commands.SetCursorPosition, idx, x+width-1);
write_strings(
tmpL,
Drawings.LineV,
tmpR,
Drawings.LineV);
}
tmpBL := tprint(Commands.SetCursorPosition, y+height-1, x);
write_strings(
tmpBL,
Drawings.CornerBL);
for 1..width-2 {
write_string(Drawings.LineH);
}
write_string(Drawings.CornerBR);
write_string(Commands.EnterNormalMode);
}
// TODO Maybe rename to "clear()"
clear_terminal :: inline () {
assert(initialized, "TUI is not ready.");
write_string(Commands.ClearScreen);
}
// TODO Maybe rename to "get_size()"
get_terminal_size :: () -> rows: int, columns: int {
assert(initialized, "TUI is not ready.");
rows, columns := OS_get_terminal_size();
return rows, columns;
}
set_cursor_position :: (row: int, column: int) {
auto_release_temp();
tmp_string := tprint(Commands.SetCursorPosition, row, column);
write_string(tmp_string);
}
get_cursor_position :: () -> row: int, column: int {
assert(initialized, "TUI is not ready."); // TODO Should I use this inside each and every procedure?
auto_release_temp();
write_string(Commands.QueryCursorPosition);
input := talloc_string(64);
input.count = OS_read_input(input.data, input.count); // TODO Does not check for read errors.
// Expected message format: \e[<r>;<c>R
// where <r> is the number of rows and <c> of columns.
assert(
input[0] == #char "\e" &&
input[1] == #char "[" &&
input[input.count-1] == #char "R",
"Query cursor position returned invalid response.");
advance(*input, 2);
parts := split(input, ";");
row := parse_int(*parts[0]);
column := parse_int(*parts[1]);
return row, column;
}
Input_Mode :: enum u8 {
HUMAN; // Shows cursor, echoes input, and expects an enter at the end of the line.
MACHINE; // Hides cursor, hides input, and reads right away once the first input is available.
}
read_input :: (allocator: Allocator = temp, $mode: Input_Mode = .HUMAN) -> string {
#if mode == .HUMAN {
write_string(Commands.ShowCursor);
defer write_string(Commands.HideCursor);
OS_set_input_mode(.HUMAN);
defer OS_set_input_mode(.MACHINE);
}
assert(allocator.proc != null, "Argument 'allocator.proc' has invalid null value.");
#assert(mode != .MACHINE); // TODO Keep an eye if I try to use read_input for machine read. Eventually, remove mode from the procedure arguments.
builder: String_Builder();
builder.allocator = allocator;
init_string_builder(*builder);
while(1) {
buffer := get_current_buffer(*builder);
buffer_data := get_buffer_data(buffer);
buffer.count = OS_read_input(buffer_data, buffer.allocated); // TODO Does not check for read errors.
if buffer.count == 0 || buffer_data[buffer.count-1] == #char "\n" break;
assert(buffer.count == buffer.allocated); // TODO If newline wasn't detected, it's because the buffer got full.
expand(*builder);
}
return builder_to_string(*builder, allocator);
}
#if OS == .WINDOWS {
// Prototyping zone... keep clear!
}
else #if OS == .LINUX || OS == .MACOS {
// Prototyping zone... keep clear!
}
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