term: add term.ui module (part 2) (#6798)

vlib/term/ui/input.v

@@ -0,0 +1,193 @@
+module ui
+
+pub enum KeyCode {
+	null                 = 0
+	tab                  = 9
+	enter                = 10
+	escape               = 27
+	space                = 32
+	backspace            = 127
+
+	exclamation          = 33
+	double_quote         = 34
+	hashtag              = 35
+	dollar               = 36
+	percent              = 37
+	ampersand            = 38
+	single_quote         = 39
+	left_paren           = 40
+	right_paren          = 41
+	asterisk             = 42
+	plus                 = 43
+	comma                = 44
+	minus                = 45
+	period               = 46
+	slash                = 47
+
+	_0                   = 48
+	_1                   = 49
+	_2                   = 50
+	_3                   = 51
+	_4                   = 52
+	_5                   = 53
+	_6                   = 54
+	_7                   = 55
+	_8                   = 56
+	_9                   = 57
+
+	colon                = 58
+	semicolon            = 59
+	less_than            = 60
+	equal                = 61
+	greater_than         = 62
+	question_mark        = 63
+	at                   = 64
+
+	a                    = 97
+	b                    = 98
+	c                    = 99
+	d                    = 100
+	e                    = 101
+	f                    = 102
+	g                    = 103
+	h                    = 104
+	i                    = 105
+	j                    = 106
+	k                    = 107
+	l                    = 108
+	m                    = 109
+	n                    = 110
+	o                    = 111
+	p                    = 112
+	q                    = 113
+	r                    = 114
+	s                    = 115
+	t                    = 116
+	u                    = 117
+	v                    = 118
+	w                    = 119
+	x                    = 120
+	y                    = 121
+	z                    = 122
+
+	left_square_bracket  = 91
+	backslash            = 92
+	right_square_bracket = 93
+	caret                = 94
+	underscore           = 95
+	backtick             = 96
+
+	left_curly_bracket   = 123
+	vertical_bar         = 124
+	right_curly_bracket  = 125
+	tilde                = 126
+
+    insert               = 260
+    delete               = 261
+    up                   = 262
+    down                 = 263
+    right                = 264
+    left                 = 265
+    page_up              = 266
+    page_down            = 267
+    home                 = 268
+    end                  = 269
+
+	f1                   = 290
+	f2                   = 291
+	f3                   = 292
+	f4                   = 293
+	f5                   = 294
+	f6                   = 295
+	f7                   = 296
+	f8                   = 297
+	f9                   = 298
+	f10                  = 299
+	f11                  = 300
+	f12                  = 301
+}
+
+pub const (
+	shift = u32(1 << 0)
+	ctrl  = u32(1 << 1)
+	alt   = u32(1 << 2)
+)
+
+pub enum Direction {
+	unknown
+	up
+	down
+	left
+	right
+}
+
+pub enum MouseButton {
+	unknown
+	primary
+	secondary
+}
+
+pub enum EventType {
+	unknown
+	mouse_down
+	mouse_up
+	mouse_move
+	mouse_drag
+	mouse_scroll
+	key_down
+	resized
+}
+
+pub struct Event {
+pub:
+	typ       EventType
+
+	// Mouse event info
+	x         int
+	y         int
+	button    MouseButton
+	direction Direction
+
+	// Keyboard event info
+	code      KeyCode
+	modifiers u32
+	ascii     byte
+	utf8      string
+
+	// Resized event info
+	width     int
+	height    int
+}
+
+pub struct Context {
+pub:
+	cfg 		  Config
+mut:
+	termios       C.termios
+	read_buf      []byte
+	print_buf     []byte
+	// init_called  bool
+	// quit_ordered bool
+pub mut:
+	frame_count   u64
+	window_width  int
+	window_height int
+}
+
+pub struct Config {
+	user_data      voidptr
+	init_fn        fn(voidptr)
+	frame_fn       fn(voidptr)
+	cleanup_fn     fn(voidptr)
+	event_fn       fn(&Event, voidptr)
+	fail_fn        fn(string)
+
+	buffer_size    int = 256
+	frame_rate     int = 30
+	use_x11        bool
+
+	hide_cursor    bool
+	capture_events bool
+	// All kill signals
+	reset          []int = [1, 2, 3, 4, 6, 7, 8, 9, 11, 13, 14, 15, 19]
+}