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|
const std = @import("std");
const lib = @import("lib.zig");
const CellCountInt = @import("size.zig").CellCountInt;
/// Output formats for terminal size reports written to the PTY.
pub const Style = lib.Enum(lib.target, &.{
// In-band size reports (mode 2048)
"mode_2048",
// XTWINOPS: report text area size in pixels
"csi_14_t",
// XTWINOPS: report cell size in pixels
"csi_16_t",
// XTWINOPS: report text area size in characters
"csi_18_t",
});
/// Runtime size values used to encode terminal size reports.
pub const Size = lib.Struct(lib.target, struct {
/// Terminal row count in cells.
rows: CellCountInt,
/// Terminal column count in cells.
columns: CellCountInt,
/// Width of a single terminal cell in pixels.
cell_width: u32,
/// Height of a single terminal cell in pixels.
cell_height: u32,
});
fn widthPixels(s: Size) u64 {
return @as(u64, s.columns) * @as(u64, s.cell_width);
}
fn heightPixels(s: Size) u64 {
return @as(u64, s.rows) * @as(u64, s.cell_height);
}
/// Encode a terminal size report sequence.
pub fn encode(
writer: *std.Io.Writer,
style: Style,
size: Size,
) std.Io.Writer.Error!void {
switch (style) {
.mode_2048 => try writer.print(
"\x1B[48;{};{};{};{}t",
.{
size.rows,
size.columns,
heightPixels(size),
widthPixels(size),
},
),
.csi_14_t => try writer.print(
"\x1b[4;{};{}t",
.{
heightPixels(size),
widthPixels(size),
},
),
.csi_16_t => try writer.print(
"\x1b[6;{};{}t",
.{
size.cell_height,
size.cell_width,
},
),
.csi_18_t => try writer.print(
"\x1b[8;{};{}t",
.{
size.rows,
size.columns,
},
),
}
}
fn testSize() Size {
return .{
.rows = 24,
.columns = 80,
.cell_width = 9,
.cell_height = 18,
};
}
test "encode mode 2048" {
var buf: [64]u8 = undefined;
var writer: std.Io.Writer = .fixed(&buf);
try encode(&writer, .mode_2048, testSize());
try std.testing.expectEqualStrings("\x1B[48;24;80;432;720t", writer.buffered());
}
test "encode csi 14 t" {
var buf: [64]u8 = undefined;
var writer: std.Io.Writer = .fixed(&buf);
try encode(&writer, .csi_14_t, testSize());
try std.testing.expectEqualStrings("\x1b[4;432;720t", writer.buffered());
}
test "encode csi 16 t" {
var buf: [64]u8 = undefined;
var writer: std.Io.Writer = .fixed(&buf);
try encode(&writer, .csi_16_t, testSize());
try std.testing.expectEqualStrings("\x1b[6;18;9t", writer.buffered());
}
test "encode csi 18 t" {
var buf: [64]u8 = undefined;
var writer: std.Io.Writer = .fixed(&buf);
try encode(&writer, .csi_18_t, testSize());
try std.testing.expectEqualStrings("\x1b[8;24;80t", writer.buffered());
}
test "encode max values for all fields" {
const max_size: Size = .{
.rows = std.math.maxInt(@FieldType(Size, "rows")),
.columns = std.math.maxInt(@FieldType(Size, "columns")),
.cell_width = std.math.maxInt(@FieldType(Size, "cell_width")),
.cell_height = std.math.maxInt(@FieldType(Size, "cell_height")),
};
const Case = struct {
style: Style,
expected: []const u8,
};
inline for ([_]Case{
.{
.style = .mode_2048,
.expected = "\x1B[48;65535;65535;281470681677825;281470681677825t",
},
.{
.style = .csi_14_t,
.expected = "\x1b[4;281470681677825;281470681677825t",
},
.{
.style = .csi_16_t,
.expected = "\x1b[6;4294967295;4294967295t",
},
.{
.style = .csi_18_t,
.expected = "\x1b[8;65535;65535t",
},
}) |case| {
var buf: [128]u8 = undefined;
var writer: std.Io.Writer = .fixed(&buf);
try encode(&writer, case.style, max_size);
try std.testing.expectEqualStrings(case.expected, writer.buffered());
}
}
|
