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const std = @import("std");
const vaxis = @import("vaxis");
// basic file navigation
// basic shell io
// basic layouting: for now following acme and ad
// * /home/goblin/05-genizah/plan9port/src/cmd/acme
// * /home/goblin/05-genizah/ad
// * /usr/lib/zig
// * ../03-plano
// right click and enter on lines to open files at specified lines
pub const Command = struct {
prev: ?*Command = null,
pub var value: union(enum) {
close,
ping,
nop,
quit,
tick,
key_press: vaxis.Key,
winsize: vaxis.Winsize,
mouse: vaxis.Mouse,
} = .nop;
};
const Loop = vaxis.Loop(@TypeOf(Command.value));
const MAX_FILES: usize = 0x200;
var rendered_lines: usize = 8;
fn ticker(io: std.Io, loop: *Loop) void {
while (true) {
io.sleep(.fromMilliseconds(200), .awake) catch return;
_ = loop.tryPostEvent(.tick) catch return;
}
}
fn extract_word(str: []u8, i: usize) []u8 {
std.debug.assert(i < str.len);
var l = i;
var r = i;
while (l > 0 and (!std.ascii.isWhitespace(str[l - 1]))) : (l -= 1) {}
while (r < str.len and (!std.ascii.isWhitespace(str[r]))) : (r += 1) {}
return str[l..r];
}
pub fn main(init: std.process.Init) !void {
std.debug.print("hello!\n", .{});
const io = init.io;
const gpa = init.gpa;
var scroll_off: u32 = 0;
const MAX_LEN: usize = 0x100;
var tty_buf: [0x10000]u8 = undefined;
var lines: [0x1000][MAX_LEN]u8 = undefined;
const lstart = 5;
const colstart = 4;
const dir = std.Io.Dir.cwd();
var cwd = try std.Io.Dir.openDir(dir, io, ".", .{ .iterate = true });
const cwd_len = try cwd.realPath(io, &lines[2]);
@memcpy(lines[0][0..1], ".");
lines[0][1] = 0;
@memcpy(lines[1][0..2], "..");
lines[1][2] = 0;
lines[2][cwd_len] = 0;
lines[3][0] = 0;
lines[4][0] = 0;
{
var i: usize = 0;
var walk = try cwd.walkSelectively(gpa);
defer walk.deinit();
while (try walk.next(io)) |e| : (i += 1) {
if (i > MAX_FILES) break;
@memcpy(lines[i + lstart][0..e.path.len], e.path);
lines[i + lstart][e.path.len] = 0;
}
rendered_lines = i;
}
var tty = try vaxis.Tty.init(io, &tty_buf);
var vx = try vaxis.init(io, gpa, init.environ_map, .{});
defer vx.deinit(gpa, tty.writer());
try vx.enterAltScreen(tty.writer());
defer vx.exitAltScreen(tty.writer()) catch {};
try vx.setMouseMode(tty.writer(), true);
var loop: Loop = .init(io, &tty, &vx);
try loop.start();
defer loop.stop();
var tick_task = try io.concurrent(ticker, .{ io, &loop });
defer tick_task.cancel(io);
var idk: u64 = 0;
var last_scroll = io.vtable.now(@ptrCast(&idk), .real);
while (true) {
const event = try loop.nextEvent();
const win = vx.window();
var arena: std.heap.ArenaAllocator = .init(gpa);
defer arena.deinit();
switch (event) {
.key_press => |key| {
if (key.matches('c', .{ .ctrl = true }) or key.matches(vaxis.Key.escape, .{})) {
break;
}
},
.mouse => |m| {
if (m.type == .press and (m.button == .wheel_down or m.button == .wheel_up)) {
const delta = last_scroll.untilNow(io, .real);
// basic debouncing
if (delta.toMilliseconds() < 30) continue;
last_scroll = io.vtable.now(@ptrCast(&idk), .real);
if (m.type == .press and m.button == .wheel_down) {
scroll_off += 1;
win.clear();
}
if (m.type == .press and m.button == .wheel_up) {
if (scroll_off > 0) {
scroll_off -= 1;
win.clear();
}
continue;
}
}
_ = try std.fmt.bufPrintSentinel(&lines[3], "{any}", .{m}, 0);
if (m.type == .press and (m.button == .right or m.button == .left)) {
// const txt = try std.fmt.allocPrint(gpa, "col={} row={} xo={} yo={}", .{ m.col, m.row, m.xoffset, m.yoffset });
const line_idx = @as(usize, @intCast(m.row)) + scroll_off;
const len = std.mem.findSentinel(u8, 0, @ptrCast(&lines[line_idx]));
const selected_col = @as(usize, @intCast(m.col)) - colstart;
const selected_line = lines[line_idx][0..len];
const next = extract_word(selected_line, selected_col);
if (cwd.openDir(io, next, .{ .iterate = true })) |d| {
cwd = d;
var walk = try cwd.walkSelectively(gpa);
defer walk.deinit();
var i: usize = 0;
while (try walk.next(io)) |e| : (i += 1) {
if (i > MAX_FILES) break;
@memcpy(lines[i + lstart][0..e.path.len], e.path);
lines[i + lstart][e.path.len] = 0;
}
rendered_lines = i;
win.clear();
// if it's not a dir maybe it's a file
} else |_| {
if (cwd.openFile(io, next, .{ .mode = .read_only })) |f| {
var buf: [0x100]u8 = undefined;
const flen = try f.length(io);
var reader = f.reader(io, &buf);
const str = reader.interface.readAlloc(gpa, flen) catch "empty";
var iter = std.mem.splitAny(u8, str, "\n");
var i: usize = 0;
while (iter.next()) |line| : (i += 1) {
if (i > MAX_FILES) break;
@memcpy(lines[i + lstart][0..line.len], line);
lines[i + lstart][line.len] = 0;
}
rendered_lines = i;
win.clear();
} else |_| {}
}
scroll_off = 0;
}
},
.winsize => |ws| try vx.resize(gpa, tty.writer(), ws),
else => {},
}
for (0..@min(MAX_FILES, rendered_lines + lstart)) |i| {
const len = @min(std.mem.findSentinel(u8, 0, @ptrCast(&lines[i + scroll_off])), MAX_LEN - 1);
_ = win.printSegment(.{ .text = lines[i + scroll_off][0..len] }, .{
.row_offset = @intCast(i),
.col_offset = colstart,
.wrap = .none,
});
const num = try std.fmt.allocPrintSentinel(arena.allocator(), "{:02}", .{i + scroll_off}, 0);
_ = win.printSegment(.{ .text = num }, .{
.row_offset = @intCast(i),
.col_offset = 0,
.wrap = .none,
});
}
try vx.render(tty.writer());
}
}
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