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const std = @import("std");
const interpreter = @import("interpreter.zig");
const io = @import("io.zig");
const spoon = @import("spoon");
var term: spoon.Term = undefined;
var args: [][:0]u8 = undefined;
var intp: *interpreter.Interpreter = undefined;
pub fn main() anyerror!void {
//--- befunge initialization ----------------------------------------------
var gpa = std.heap.GeneralPurposeAllocator(.{}){};
defer std.debug.assert(!gpa.deinit());
args = try std.process.argsAlloc(gpa.allocator());
defer std.process.argsFree(gpa.allocator(), args);
if (args.len < 2) {
std.debug.print("Usage: {s} <b98_file_to_run>\n", .{args[0]});
std.os.exit(1);
}
var file = try std.fs.cwd().openFile(args[1], .{});
defer file.close();
const env: []const [*:0]const u8 = std.os.environ;
intp = try interpreter.Interpreter.init(gpa.allocator(), file.reader(), null, args, env[0..]);
defer intp.deinit();
var ioContext = io.context(std.io.getStdIn().reader(), std.io.getStdOut().writer()); // TODO io functions for tui
//--- Term initialization -------------------------------------------------
try term.init(.{});
defer term.deinit();
try std.os.sigaction(std.os.SIG.WINCH, &std.os.Sigaction{
.handler = .{ .handler = handleSigWinch },
.mask = std.os.empty_sigset,
.flags = 0,
}, null);
var fds: [1]std.os.pollfd = undefined;
fds[0] = .{
.fd = term.tty.handle,
.events = std.os.POLL.IN,
.revents = undefined,
};
try term.uncook(.{});
defer term.cook() catch {};
//--- Main loop -----------------------------------------------------------
try term.fetchSize();
try term.setWindowTitle("zigfunge98-tui", .{});
try render();
var buf: [16]u8 = undefined;
var done = false;
while (!done) {
_ = try std.os.poll(&fds, -1);
const read = try term.readInput(&buf);
var it = spoon.inputParser(buf[0..read]);
while (it.next()) |in| {
if (in.eqlDescription("escape") or in.eqlDescription("q")) {
done = true;
break;
} else if (in.eqlDescription("s")) {
if (try intp.step(&ioContext)) |code| {
std.os.exit(@intCast(u8, code));
}
try render();
}
}
}
}
fn handleSigWinch(_: c_int) callconv(.C) void {
term.fetchSize() catch {};
render() catch {};
}
fn render() !void {
var rc = try term.getRenderContext();
defer rc.done() catch {};
try rc.clear();
if (term.width < 80 or term.height < 24) {
try rc.setAttribute(.{ .fg = .red, .bold = true });
try rc.writeAllWrapping("Terminal too small!");
return;
}
const pointer = intp.getPointer().getInfo();
try rc.moveCursorTo(0, 0);
var filename = rc.restrictedPaddingWriter(term.width);
try filename.writer().print("{s} | steps:{d}", .{ args[1], 0 });
try rc.moveCursorTo(2, 0);
try rc.setAttribute(.{ .fg = .green, .reverse = true });
var stack = rc.restrictedPaddingWriter(16);
try stack.writer().writeAll("---- Stack ----");
try rc.moveCursorTo(2, 18);
try rc.setAttribute(.{ .fg = .blue, .reverse = true });
var fieldTitle = rc.restrictedPaddingWriter(term.width - 17);
const size = intp.getField().getSize();
try fieldTitle.writer().print("Funge field | top left corner:({d},{d}) size:{d}x{d}", .{ size[0], size[1], size[2], size[3] });
try fieldTitle.pad();
try rc.setAttribute(.{ .fg = .blue, .reverse = false });
var y: usize = 0; // TODO negative lines
while (y < @min(@intCast(usize, size[3]), term.height - 3)) : (y += 1) {
var field = rc.restrictedPaddingWriter(term.width - 17);
const line = intp.getField().getLine(y);
const data = line.getData();
var x: usize = 0;
if (line.getX() >= 0) {
try rc.moveCursorTo(y + 3, 18 + @intCast(usize, line.getX()));
} else {
try rc.moveCursorTo(y + 3, 18); // TODO negative columns
}
while (x < @min(data.items.len, term.width - 18)) : (x += 1) {
if (x == pointer.x and y == pointer.y) {
try rc.setAttribute(.{ .fg = .magenta, .reverse = true });
}
if (x == pointer.x + pointer.dx and y == pointer.y + pointer.dy) { // TODO optmize that?
try rc.setAttribute(.{ .fg = .magenta, .reverse = false });
}
if (data.items[x] >= 32 and data.items[x] < 127) {
try field.writer().print("{c}", .{@intCast(u8, data.items[x])});
} else {
try field.writer().writeAll("®");
}
if (x == pointer.x and y == pointer.y or x == pointer.x + pointer.dx and y == pointer.y + pointer.dy) {
try rc.setAttribute(.{ .fg = .blue, .reverse = false });
}
}
}
}
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