vibes layout and multiple terminals

1 files changed, 43 insertions, 0 deletions

diff --git a/term.zig b/term.zig
new file mode 100644
index 00000000..a69e8c4d
--- /dev/null
+++ b/term.zig
@@ -0,0 +1,43 @@
+const std = @import("std");
+const ghostty_vt = @import("ghostty-vt");
+
+/// One text selection (block-shaped), in pane-local coords; the row carries the
+/// scrollback offset. .none == nothing selected.
+pub const Sel = struct {
+    state: enum { none, dragging, done } = .none,
+    c0: i32 = 0,
+    c1: i32 = 0,
+    r0: i32 = 0,
+    r1: i32 = 0,
+};
+
+/// Persistent per-terminal state: the pty handle, the ghostty emulator and its
+/// (stateful) VT parser, the background reader task, plus its layout weight and
+/// text selection.
+///
+/// Heap-allocate these and never move them: `stream`'s handler holds a pointer
+/// back into `term`, so the address must stay stable for parser state split
+/// across pty reads to keep working.
+pub const Term = @This();
+
+pty: std.Io.File,
+term: ghostty_vt.Terminal,
+stream: ghostty_vt.TerminalStream,
+reader: std.Io.Future(anyerror!void),
+
+/// current emulator grid size; we only push a resize when it actually changes.
+cols: u16,
+rows: u16,
+
+/// vertical weight within the column (siblings split the column height by this).
+vweight: f32 = 1,
+
+/// One independent selection per mouse button: 0=left, 1=middle, 2=right.
+sel: [3]Sel = .{ .{}, .{}, .{} },
+
+pub fn deinit(self: *Term, io: std.Io, gpa: std.mem.Allocator) void {
+    _ = self.reader.cancel(io) catch {};
+    self.stream.deinit();
+    self.term.deinit(gpa);
+    self.pty.close(io);
+}