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+//! The terminal shell: owns the event loop and all IO. Translates vaxis
+//! events into core events, performs the core's effects (fork ptys, write
+//! them, resize them), and hands the core's Surface to vaxis cell-for-cell —
+//! the canonical interface rendered with no interpretation.
+const std = @import("std");
+const builtin = @import("builtin");
+const posix = std.posix;
+const libc = std.c;
+const vaxis = @import("vaxis");
+const pardes = @import("../pardes.zig");
+const tracy = @import("../tracy.zig");
+const look = @import("../look.zig");
+
+extern "c" fn forkpty(amaster: *c_int, name: ?[*:0]u8, termp: ?*const anyopaque, winp: ?*const posix.winsize) c_int;
+extern "c" fn execv(path: [*:0]const u8, argv: [*:null]const ?[*:0]const u8) c_int;
+extern "c" fn chdir(path: [*:0]const u8) c_int;
+extern "c" fn _exit(status: c_int) noreturn;
+extern "c" fn setenv(name: [*:0]const u8, value: [*:0]const u8, overwrite: c_int) c_int;
+
+// absolute shell path per OS: execv must not search PATH (no allocation
+// between fork and exec)
+const bash_path: [*:0]const u8 = if (builtin.os.tag == .linux) "/usr/bin/bash" else "/bin/bash";
+// TIOCSWINSZ: absent from std.c.T on darwin — _IOW('t', 103, winsize)
+const TIOCSWINSZ: c_int = @bitCast(@as(u32, if (@hasDecl(posix.T, "IOCSWINSZ")) posix.T.IOCSWINSZ else 0x80087467));
+
+pub const Command = struct {
+ pub var value: union(enum) {
+ nop,
+ quit,
+ tick,
+ key_press: vaxis.Key,
+ pty_read: struct { id: usize, bytes: []u8 },
+ pty_eof: struct { id: usize, gen: u32 },
+ winsize: vaxis.Winsize,
+ mouse: vaxis.Mouse,
+ paste: []const u8,
+ /// a language query finished on a worker; rows are gpa-owned
+ lsp_done: struct { id: u32, rows: []u8 },
+ } = .nop;
+};
+const Loop = vaxis.Loop(@TypeOf(Command.value));
+
+/// One language query, owned by the worker that runs it. Everything the
+/// backend may read is copied in here before the worker starts: the core goes
+/// on editing the moment the effect is drained, so a borrowed slice would be a
+/// use-after-free the length of one keystroke.
+const LspJob = struct {
+ id: u32,
+ kind: pardes.lsp.Kind,
+ offset: u32,
+ path: []u8,
+ source: [:0]u8,
+ arg: []u8,
+ root: []u8,
+
+ fn free(j: *LspJob, gpa: std.mem.Allocator) void {
+ gpa.free(j.path);
+ gpa.free(j.source);
+ gpa.free(j.arg);
+ gpa.free(j.root);
+ gpa.destroy(j);
+ }
+};
+
+const Pty = struct {
+ file: std.Io.File,
+ pid: posix.pid_t,
+ reader: std.Io.Future(anyerror!void),
+};
+
+pub fn run(init: std.process.Init, opts: pardes.Options) !void {
+ const io = init.io;
+ const gpa = init.gpa;
+
+ // SIGWINCH must never run vaxis's signal handler: it posts the winsize
+ // event through std.Io.Mutex/Condition, and when the signal lands on a
+ // thread blocked inside an Io.Threaded syscall region (pty readers in
+ // read(2), the main thread parked in queue.pop) a contended lock re-enters
+ // the Io machinery and Syscall.start hits `unreachable` — panic, then the
+ // panic-time terminal restore used to write through the same Io and
+ // recurse until stack overflow. Reproduced by resizing the outer terminal
+ // (e.g. a font-size change) while shells run. Block it here, before any
+ // thread exists (threads inherit the mask, so vaxis's handler never
+ // fires), and take it synchronously on the sigwait thread below instead.
+ var winch_set = posix.sigemptyset();
+ posix.sigaddset(&winch_set, posix.SIG.WINCH);
+ posix.sigprocmask(posix.SIG.BLOCK, &winch_set, null);
+
+ var tty_buf: [0x10000]u8 = undefined;
+ var tty = try vaxis.Tty.init(io, &tty_buf);
+ defer tty.deinit(); // restore cooked termios LAST, after vx flushed its resets
+ var vx = try vaxis.init(io, gpa, init.environ_map, .{ .system_clipboard_allocator = gpa });
+ defer vx.deinit(gpa, tty.writer());
+ try vx.enterAltScreen(tty.writer());
+ defer vx.exitAltScreen(tty.writer()) catch {};
+ // requests 1002;1003;1004;1006 (cell-coordinate SGR; called pre-query, so
+ // vaxis never upgrades to 1016 pixel mode). Note: ghostty's GTK apprt drops
+ // middle press+release BEFORE mouse reporting when the desktop sets
+ // gtk-enable-primary-paste=false — no mode we request can surface middle
+ // clicks there (see test/snapshots/ghostty-mid.snap).
+ try vx.setMouseMode(tty.writer(), true);
+
+ var frame_arena: std.heap.ArenaAllocator = .init(gpa);
+ defer frame_arena.deinit();
+
+ // stb_image allocator for image panes
+ pardes.image.start(io, gpa);
+ defer pardes.image.stop();
+
+ var core = if (opts.load_path) |lp| blk: {
+ const bytes = try look.readFile(gpa, lp);
+ defer gpa.free(bytes);
+ break :blk try pardes.Pardes.initFromDump(gpa, opts, bytes);
+ } else try pardes.Pardes.init(gpa, opts);
+ defer core.deinit();
+
+ // shells emit OSC 133 prompt marks via this rc (prompt hiding, click-move)
+ writeFile(pardes.bash_rc);
+ // macos: apple's bash 3.2 prints the zsh-deprecation banner into every
+ // pane unless this is in the env BEFORE bash starts (the rc is too late)
+ if (comptime builtin.os.tag.isDarwin()) _ = setenv("BASH_SILENCE_DEPRECATION_WARNING", "1", 1);
+
+ var kitty_handles: [pardes.MAX_PANES]?vaxis.Image = @splat(null);
+ var ptys: [pardes.MAX_PANES]?Pty = @splat(null);
+ // per-slot spawn generation: a reused pane id ignores the old shell's
+ // late pty_eof (which would otherwise close the NEW pty on that slot)
+ var gens: [pardes.MAX_PANES]u32 = @splat(0);
+ // the single in-flight language query (see the .lsp effect)
+ var lsp_task: ?std.Io.Future(anyerror!void) = null;
+ var loop: Loop = .init(io, &tty, &vx);
+ defer {
+ // reap the reader tasks (cancel interrupts a blocked read) before
+ // closing the masters — the runtime joins those threads on exit and a
+ // reader stuck in read(2) would hang the process — then drain the
+ // queue: leftover events own gpa bytes and would dump as leaks.
+ for (&ptys) |*slot| if (slot.*) |*pt| {
+ pt.reader.cancel(io) catch {};
+ _ = libc.close(pt.file.handle);
+ slot.* = null;
+ };
+ // join the query worker BEFORE the drain below, or its late post
+ // lands in a queue nobody empties again and the rows leak
+ if (lsp_task) |*t| {
+ t.cancel(io) catch {};
+ lsp_task = null;
+ }
+ while (loop.tryEvent() catch null) |ev| switch (ev) {
+ .pty_read => |pr| gpa.free(pr.bytes),
+ .paste => |b| gpa.free(@constCast(b)),
+ .lsp_done => |d| gpa.free(d.rows),
+ else => {},
+ };
+ }
+
+ // Perform the initial spawns BEFORE any worker thread exists: forkpty from
+ // a multithreaded process can wedge the child before exec.
+ drainEffects(core, &ptys, &gens, io, gpa, &loop, &vx, &tty, &lsp_task, false);
+
+ try loop.start();
+ defer loop.stop();
+ // resize watcher: plain detached thread (not io.concurrent — teardown
+ // joins those, and sigwait never returns); dies with the process
+ (try std.Thread.spawn(.{}, winchWatch, .{ &loop, &vx, &tty })).detach();
+ vx.queryTerminal(tty.writer(), std.Io.Duration.fromMilliseconds(2)) catch {};
+
+ // now threads are fine: start a reader task per pty
+ for (&ptys, 0..) |*slot, id| if (slot.*) |*pt| {
+ pt.reader = try io.concurrent(readPty, .{ io, gpa, pt.file, id, gens[id], &loop });
+ };
+
+ var pending: ?@TypeOf(Command.value) = .tick;
+ while (!core.quit) {
+ var event = if (pending) |ev| blk: {
+ pending = null;
+ break :blk ev;
+ } else try loop.nextEvent();
+ const tz_event = tracy.zone(@src(), "event");
+ // Apply every queued INPUT event, then render ONCE — the gui shell
+ // drains SDL's queue the same way. Without this a wheel flick is fifty
+ // full render+repaint (and re-highlight) cycles instead of one.
+ // pty output keeps a frame per chunk: progress paints as it arrives.
+ var stop = false;
+ var batch: usize = 0;
+ while (true) {
+ var output = false;
+ switch (event) {
+ .nop, .tick => {},
+ .quit => stop = true,
+ .winsize => |ws| {
+ try vx.resize(gpa, tty.writer(), ws);
+ core.update(.{ .resize = .{ .cols = @intCast(ws.cols), .rows = @intCast(ws.rows) } });
+ },
+ .pty_read => |pr| {
+ core.update(.{ .output = .{ .pane = @intCast(pr.id), .bytes = pr.bytes } });
+ gpa.free(pr.bytes);
+ output = true;
+ },
+ .pty_eof => |e| if (gens[e.id] == e.gen) {
+ if (ptys[e.id]) |*pt| {
+ pt.reader.await(io) catch {}; // reader just finished; join it or its future leaks
+ _ = libc.close(pt.file.handle);
+ ptys[e.id] = null;
+ }
+ core.update(.{ .eof = .{ .pane = @intCast(e.id) } });
+ },
+ .key_press => |key| core.update(.{ .key = .{
+ .cp = mapKey(effCp(key)),
+ .text = key.text orelse "",
+ .ctrl = key.mods.ctrl,
+ .alt = key.mods.alt,
+ .shift = key.mods.shift,
+ } }),
+ .mouse => |m| {
+ const button: ?pardes.Mouse.Button = switch (m.button) {
+ .left => .left,
+ .middle => .middle,
+ .right => .right,
+ .wheel_up => .wheel_up,
+ .wheel_down => .wheel_down,
+ .wheel_left => .wheel_left,
+ .wheel_right => .wheel_right,
+ .none => .none, // button-less motion: hover tracking
+ else => null,
+ };
+ if (button) |b| core.update(.{ .mouse = .{
+ .button = b,
+ .kind = switch (m.type) {
+ .press => .press,
+ .release => .release,
+ .motion => .motion,
+ .drag => .drag,
+ },
+ .col = @intCast(m.col),
+ .row = @intCast(m.row),
+ .ctrl = m.mods.ctrl,
+ } });
+ },
+ .paste => |bytes| {
+ core.update(.{ .paste = bytes });
+ gpa.free(@constCast(bytes));
+ },
+ .lsp_done => |d| {
+ core.update(.{ .lsp_resp = .{ .id = d.id, .rows = d.rows } });
+ gpa.free(d.rows);
+ // the worker is finished; join it so its future does not
+ // leak (same contract as pty_eof above)
+ if (lsp_task) |*t| {
+ t.await(io) catch {};
+ lsp_task = null;
+ }
+ },
+ }
+ batch += 1;
+ if (stop or output or batch >= 64) break;
+ event = (try loop.tryEvent()) orelse break;
+ }
+ tz_event.end();
+ if (stop) break;
+
+ drainEffects(core, &ptys, &gens, io, gpa, &loop, &vx, &tty, &lsp_task, true);
+ if (core.quit) break;
+
+ // Restore builtin: swap in a core rebuilt from the dump; the live
+ // shells die with their masters (readers canceled, gens bumped so
+ // their late eofs never touch the replay panes)
+ if (core.takeRestore()) |rp| blk: {
+ const bytes = look.readFile(gpa, rp) catch break :blk;
+ defer gpa.free(bytes);
+ var o = core.opts;
+ o.cols = core.screen_w;
+ o.rows = core.screen_h; // pre-size: dump panes never greet
+ const nc = pardes.Pardes.initFromDump(gpa, o, bytes) catch break :blk;
+ for (&ptys, 0..) |*slot, pid| if (slot.*) |*pt| {
+ pt.reader.cancel(io) catch {};
+ _ = libc.close(pt.file.handle);
+ slot.* = null;
+ gens[pid] +%= 1;
+ };
+ kitty_handles = @splat(null);
+ core.deinit();
+ core = nc;
+ }
+
+ // live cwd for tags/look: cheap per-pane lookup, per frame
+ for (&ptys, 0..) |*slot, id| if (slot.*) |pt| {
+ var lbuf: [1024]u8 = undefined;
+ if (look.shellCwd(pt.pid, &lbuf)) |cwd| core.setCwd(id, cwd);
+ };
+
+ // ---- render: surface -> vaxis, cell for cell ----
+ _ = frame_arena.reset(.retain_capacity);
+ const tz_core = tracy.zone(@src(), "core.render");
+ const surface = try core.render(frame_arena.allocator());
+ tz_core.end();
+ const tz_cells = tracy.zone(@src(), "surface->vaxis");
+ const win = vx.window();
+ win.clear();
+ var y: u16 = 0;
+ while (y < surface.rows) : (y += 1) {
+ var x: u16 = 0;
+ while (x < surface.cols) : (x += 1) {
+ const cell = surface.at(x, y);
+ if (cell.default) continue;
+ win.writeCell(x, y, .{
+ .char = .{ .grapheme = cell.grapheme() },
+ .style = vaxisStyle(cell.style),
+ });
+ }
+ }
+ tz_cells.end();
+ // pixel attachments (kitty graphics): transmit once per pane, then
+ // re-place every frame (placements aren't persistent)
+ for (surface.images[0..surface.nimages]) |maybe| {
+ const place = maybe orelse continue;
+ if (kitty_handles[place.pane] == null and vx.caps.kitty_graphics) {
+ const enc = std.base64.standard.Encoder;
+ if (gpa.alloc(u8, enc.calcSize(place.rgba.len))) |b64| {
+ defer gpa.free(b64);
+ _ = enc.encode(b64, place.rgba);
+ kitty_handles[place.pane] = vx.transmitPreEncodedImage(tty.writer(), b64, @intCast(place.iw), @intCast(place.ih), .rgba) catch null;
+ } else |_| {}
+ }
+ if (kitty_handles[place.pane]) |h| {
+ const child = win.child(.{ .x_off = place.x, .y_off = place.y, .width = place.w, .height = place.h });
+ h.draw(child, .{ .scale = .contain }) catch {};
+ }
+ }
+ if (surface.cursor) |cur| {
+ win.showCursor(cur.x, cur.y);
+ // insert = beam, everything else = the terminal's default shape
+ win.setCursorShape(if (cur.bar) .beam else .default);
+ }
+ const tz_render = tracy.zone(@src(), "vx.render");
+ try vx.render(tty.writer());
+ tz_render.end();
+ tracy.frameMark();
+ }
+}
+
+fn drainEffects(
+ core: *pardes.Pardes,
+ ptys: *[pardes.MAX_PANES]?Pty,
+ gens: *[pardes.MAX_PANES]u32,
+ io: std.Io,
+ gpa: std.mem.Allocator,
+ loop: *Loop,
+ vx: *vaxis.Vaxis,
+ tty: *vaxis.Tty,
+ lsp_task: *?std.Io.Future(anyerror!void),
+ threads_ok: bool,
+) void {
+ while (core.nextEffect()) |effect| switch (effect) {
+ .spawn => |sp| {
+ // the core reuses pane ids and there is no close effect: a deleted
+ // pane's shell lives in its slot until a respawn lands here — reap
+ // it (cancel joins the reader; its late eof is ignored by gen)
+ if (ptys[sp.pane]) |*old| {
+ old.reader.cancel(io) catch {};
+ _ = libc.close(old.file.handle);
+ ptys[sp.pane] = null;
+ }
+ gens[sp.pane] +%= 1;
+ const cwd = sp.cwd.slice();
+ var cwd_buf: [256:0]u8 = undefined;
+ var cwd_z: ?[*:0]const u8 = null;
+ if (cwd.len > 0) {
+ @memcpy(cwd_buf[0..cwd.len], cwd);
+ cwd_buf[cwd.len] = 0;
+ cwd_z = @ptrCast(&cwd_buf);
+ }
+ const child = forkShell(cwd_z, core.screen_h, core.screen_w);
+ ptys[sp.pane] = .{ .file = child.file, .pid = child.pid, .reader = .{ .any_future = null, .result = {} } };
+ // report the pane's starting directory back to the core (tags)
+ var lbuf: [1024]u8 = undefined;
+ if (look.shellCwd(child.pid, &lbuf)) |wd| core.setCwd(sp.pane, wd);
+ if (threads_ok) {
+ if (ptys[sp.pane]) |*pt| {
+ pt.reader = io.concurrent(readPty, .{ io, gpa, pt.file, @as(usize, sp.pane), gens[sp.pane], loop }) catch pt.reader;
+ }
+ }
+ },
+ .write => |w| {
+ if (ptys[w.pane]) |pt| writeFd(pt.file.handle, w.bytes.slice());
+ },
+ .resize_pty => |rs| {
+ if (ptys[rs.pane]) |pt| {
+ const ws: posix.winsize = .{ .row = rs.rows, .col = rs.cols, .xpixel = 0, .ypixel = 0 };
+ _ = posix.system.ioctl(pt.file.handle, TIOCSWINSZ, @intFromPtr(&ws));
+ }
+ },
+ .open_link => |url| look.openLink(url.slice()), // desktop browser
+ .save_file => |sf| {
+ const pane = core.panes[sf.pane] orelse continue;
+ const f = pane.file orelse continue;
+ var pathbuf: [4096:0]u8 = undefined;
+ if (f.path.len >= pathbuf.len) continue;
+ @memcpy(pathbuf[0..f.path.len], f.path);
+ pathbuf[f.path.len] = 0;
+ const fd = libc.open(pathbuf[0..f.path.len :0], .{ .ACCMODE = .WRONLY, .CREAT = true, .TRUNC = true }, @as(libc.mode_t, 0o644));
+ if (fd < 0) continue;
+ writeFd(fd, f.content);
+ _ = libc.close(fd);
+ },
+ .write_dump => {
+ const out = core.dump_out orelse continue;
+ var pbuf: [1024:0]u8 = undefined;
+ const path = pardes.dump.outPath(&pbuf) orelse continue;
+ const fd = libc.open(path, .{ .ACCMODE = .WRONLY, .CREAT = true, .TRUNC = true }, @as(libc.mode_t, 0o644));
+ if (fd < 0) continue;
+ writeFd(fd, out);
+ _ = libc.close(fd);
+ core.setLastDump(path);
+ },
+ .set_clipboard => {
+ // mirror the core's yank register out via OSC 52
+ if (core.yank) |y| vx.copyToSystemClipboard(tty.writer(), y, gpa) catch {};
+ },
+ .lsp => |q| {
+ if (!threads_ok) continue; // pre-loop drain: nothing to answer to yet
+ const pane = core.panes[q.pane] orelse continue;
+ // a pane with no file still asks `status` (it is about the backend,
+ // not the buffer): empty path and source, root from the pane's cwd
+ const f = pane.file;
+ const job = gpa.create(LspJob) catch continue;
+ job.* = .{
+ .id = q.id,
+ .kind = q.kind,
+ .offset = q.offset,
+ .path = gpa.dupe(u8, if (f) |ff| ff.path else "") catch {
+ gpa.destroy(job);
+ continue;
+ },
+ .source = gpa.dupeZ(u8, if (f) |ff| ff.content else "") catch {
+ gpa.free(job.path);
+ gpa.destroy(job);
+ continue;
+ },
+ .arg = gpa.dupe(u8, q.arg.slice()) catch {
+ gpa.free(job.path);
+ gpa.free(job.source);
+ gpa.destroy(job);
+ continue;
+ },
+ .root = gpa.dupe(u8, if (f) |ff| (std.fs.path.dirname(ff.path) orelse "/") else pane.cwdSlice()) catch {
+ gpa.free(job.path);
+ gpa.free(job.source);
+ gpa.free(job.arg);
+ gpa.destroy(job);
+ continue;
+ },
+ };
+ // ponytail: ONE query in flight, so one future slot. Replacing it
+ // cancels-then-joins the previous worker, which for a backend that
+ // ignores cancellation means waiting out a query the user already
+ // abandoned. Queries are milliseconds; make this a real pool the
+ // day a backend takes long enough to notice.
+ if (lsp_task.*) |*old| {
+ old.cancel(io) catch {};
+ lsp_task.* = null;
+ }
+ lsp_task.* = io.concurrent(lspWorker, .{ gpa, job, loop }) catch {
+ job.free(gpa);
+ continue;
+ };
+ },
+ .quit => {},
+ };
+}
+
+/// Answer a language query off the event loop and post the rows back. This is
+/// the whole async execution model: the same shape as readPty — do the slow
+/// thing on a worker, hand the result to the loop as an event, let the core
+/// stay a state machine that never blocks.
+fn lspWorker(gpa: std.mem.Allocator, job: *LspJob, loop: *Loop) anyerror!void {
+ defer job.free(gpa);
+ var arena: std.heap.ArenaAllocator = .init(gpa);
+ defer arena.deinit();
+ // the shell owns the result buffer; the backend only ever writes to it
+ var out: std.Io.Writer.Allocating = .init(gpa);
+ defer out.deinit();
+ pardes.lsp.query(gpa, arena.allocator(), .{
+ .kind = job.kind,
+ .path = job.path,
+ .source = job.source,
+ .offset = job.offset,
+ .arg = job.arg,
+ .root = job.root,
+ }, &out.writer);
+ const rows = gpa.dupe(u8, out.written()) catch return;
+ loop.postEvent(.{ .lsp_done = .{ .id = job.id, .rows = rows } }) catch gpa.free(rows);
+ return;
+}
+
+/// Consume SIGWINCH synchronously (it is blocked in every thread) and post
+/// the new size as a winsize event from normal thread context — the one place
+/// vaxis's Io-backed queue is safe to touch on a resize.
+fn winchWatch(loop: *Loop, vx: *vaxis.Vaxis, tty: *vaxis.Tty) void {
+ var set = posix.sigemptyset();
+ posix.sigaddset(&set, posix.SIG.WINCH);
+ while (true) {
+ var sig: c_int = 0;
+ if (libc.sigwait(&set, &sig) != 0) continue;
+ if (vx.state.in_band_resize) continue; // terminal reports via CSI 48
+ const ws = tty.getWinsize() catch continue;
+ loop.postEvent(.{ .winsize = ws }) catch {};
+ }
+}
+
+fn forkShell(cwd: ?[*:0]const u8, rows: u16, cols: u16) struct { file: std.Io.File, pid: posix.pid_t } {
+ var master: c_int = undefined;
+ const ws = posix.winsize{ .row = rows, .col = cols, .xpixel = 0, .ypixel = 0 };
+ const pid = forkpty(&master, null, null, &ws);
+ if (pid == 0) {
+ // the blocked-SIGWINCH mask survives fork AND exec — unblock it or
+ // bash/vim in the pane would never see resizes (sigprocmask is
+ // async-signal-safe)
+ var set = posix.sigemptyset();
+ posix.sigaddset(&set, posix.SIG.WINCH);
+ posix.sigprocmask(posix.SIG.UNBLOCK, &set, null);
+ if (cwd) |c| _ = chdir(c);
+ const argv: [4:null]?[*:0]const u8 = .{ bash_path, "--rcfile", "/tmp/pardes-osc133.bash", null };
+ _ = execv(bash_path, &argv);
+ _exit(127);
+ }
+ return .{ .file = .{ .handle = master, .flags = .{ .nonblocking = false } }, .pid = pid };
+}
+
+fn readPty(io: std.Io, gpa: std.mem.Allocator, pty: std.Io.File, id: usize, gen: u32, loop: *Loop) anyerror!void {
+ var read_buf: [0x10000]u8 = undefined;
+ var reader = pty.readerStreaming(io, &read_buf);
+ while (true) {
+ var buf: [0x10000]u8 = undefined;
+ var vec = [_][]u8{&buf};
+ const n = reader.interface.readVec(&vec) catch break;
+ if (n == 0) break;
+ const bytes = try gpa.dupe(u8, buf[0..n]);
+ loop.postEvent(.{ .pty_read = .{ .id = id, .bytes = bytes } }) catch {
+ gpa.free(bytes);
+ break;
+ };
+ }
+ // non-blocking: a teardown cancel only unblocks one wait, so a blocking
+ // post into a full queue here could hang the exit
+ _ = loop.tryPostEvent(.{ .pty_eof = .{ .id = id, .gen = gen } }) catch {};
+}
+
+/// The effective codepoint the way vaxis Key.matches sees it: a single-char
+/// text wins (shift resolved by the terminal), else the shifted codepoint.
+fn effCp(key: vaxis.Key) u21 {
+ if (key.text) |t| {
+ const view = std.unicode.Utf8View.init(t) catch return key.codepoint;
+ var it = view.iterator();
+ if (it.nextCodepoint()) |c| {
+ if (it.nextCodepoint() == null) return c;
+ }
+ }
+ return key.shifted_codepoint orelse key.codepoint;
+}
+
+/// vaxis functional-key codepoints -> core Key constants (ASCII ones already
+/// coincide: enter/tab/escape/backspace pass through).
+fn mapKey(cp: u21) u21 {
+ return switch (cp) {
+ vaxis.Key.up => pardes.Key.up,
+ vaxis.Key.down => pardes.Key.down,
+ vaxis.Key.left => pardes.Key.left,
+ vaxis.Key.right => pardes.Key.right,
+ vaxis.Key.home => pardes.Key.home,
+ vaxis.Key.end => pardes.Key.end,
+ vaxis.Key.page_up => pardes.Key.page_up,
+ vaxis.Key.page_down => pardes.Key.page_down,
+ vaxis.Key.delete => pardes.Key.delete,
+ else => cp,
+ };
+}
+
+fn vaxisStyle(s: pardes.CellStyle) vaxis.Style {
+ return .{
+ .fg = vaxisColor(s.fg),
+ .bg = vaxisColor(s.bg),
+ .bold = s.bold,
+ .dim = s.dim,
+ .italic = s.italic,
+ .blink = s.blink,
+ .reverse = s.reverse,
+ .invisible = s.invisible,
+ .strikethrough = s.strikethrough,
+ .ul_style = switch (s.ul) {
+ .off => .off,
+ .single => .single,
+ .double => .double,
+ .curly => .curly,
+ .dotted => .dotted,
+ .dashed => .dashed,
+ },
+ };
+}
+
+fn vaxisColor(c: pardes.Color) vaxis.Color {
+ return switch (c) {
+ .default => .default,
+ .index => |i| .{ .index = i },
+ .rgb => |rgb| .{ .rgb = rgb },
+ };
+}
+
+fn writeFile(data: []const u8) void {
+ const fd = libc.open("/tmp/pardes-osc133.bash", .{ .ACCMODE = .WRONLY, .CREAT = true, .TRUNC = true }, @as(libc.mode_t, 0o644));
+ if (fd < 0) return;
+ defer _ = libc.close(fd);
+ writeFd(fd, data);
+}
+
+fn writeFd(fd: c_int, data: []const u8) void {
+ var off: usize = 0;
+ while (off < data.len) {
+ const n = libc.write(fd, data[off..].ptr, data.len - off);
+ if (n < 0) {
+ if (libc.errno(n) == .INTR) continue;
+ return;
+ }
+ off += @intCast(n);
+ }
+}
generated by cgit v1.3 (git 2.53.0) at 2026-10-02 05:36:42 +0000