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504 lines
10 KiB
Go
504 lines
10 KiB
Go
// +build ncurses
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// +build !windows
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// +build !tcell
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package tui
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/*
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#include <ncurses.h>
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#include <locale.h>
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#cgo !static LDFLAGS: -lncurses
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#cgo static LDFLAGS: -l:libncursesw.a -l:libtinfo.a -l:libgpm.a -ldl
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#cgo android static LDFLAGS: -l:libncurses.a -fPIE -march=armv7-a -mfpu=neon -mhard-float -Wl,--no-warn-mismatch
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FILE* c_tty() {
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return fopen("/dev/tty", "r");
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}
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SCREEN* c_newterm(FILE* tty) {
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return newterm(NULL, stderr, tty);
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}
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int c_getcurx(WINDOW* win) {
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return getcurx(win);
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}
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*/
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import "C"
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import (
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"os"
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"strconv"
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"strings"
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"time"
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"unicode/utf8"
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)
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func HasFullscreenRenderer() bool {
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return true
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}
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type Attr C.uint
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type CursesWindow struct {
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impl *C.WINDOW
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top int
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left int
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width int
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height int
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}
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func (w *CursesWindow) Top() int {
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return w.top
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}
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func (w *CursesWindow) Left() int {
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return w.left
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}
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func (w *CursesWindow) Width() int {
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return w.width
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}
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func (w *CursesWindow) Height() int {
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return w.height
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}
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func (w *CursesWindow) Refresh() {
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C.wnoutrefresh(w.impl)
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}
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func (w *CursesWindow) FinishFill() {
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// NO-OP
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}
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const (
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Bold Attr = C.A_BOLD
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Dim = C.A_DIM
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Blink = C.A_BLINK
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Reverse = C.A_REVERSE
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Underline = C.A_UNDERLINE
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)
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var Italic Attr = C.A_VERTICAL << 1 // FIXME
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const (
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AttrRegular Attr = 0
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)
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var (
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_screen *C.SCREEN
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_colorMap map[int]int16
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_colorFn func(ColorPair, Attr) (C.short, C.int)
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)
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func init() {
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_colorMap = make(map[int]int16)
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if strings.HasPrefix(C.GoString(C.curses_version()), "ncurses 5") {
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Italic = C.A_NORMAL
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}
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}
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func (a Attr) Merge(b Attr) Attr {
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return a | b
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}
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func (r *FullscreenRenderer) defaultTheme() *ColorTheme {
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if C.tigetnum(C.CString("colors")) >= 256 {
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return Dark256
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}
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return Default16
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}
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func (r *FullscreenRenderer) Init() {
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C.setlocale(C.LC_ALL, C.CString(""))
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tty := C.c_tty()
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if tty == nil {
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errorExit("Failed to open /dev/tty")
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}
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_screen = C.c_newterm(tty)
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if _screen == nil {
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errorExit("Invalid $TERM: " + os.Getenv("TERM"))
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}
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C.set_term(_screen)
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if r.mouse {
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C.mousemask(C.ALL_MOUSE_EVENTS, nil)
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C.mouseinterval(0)
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}
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C.noecho()
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C.raw() // stty dsusp undef
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C.nonl()
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C.keypad(C.stdscr, true)
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delay := 50
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delayEnv := os.Getenv("ESCDELAY")
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if len(delayEnv) > 0 {
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num, err := strconv.Atoi(delayEnv)
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if err == nil && num >= 0 {
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delay = num
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}
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}
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C.set_escdelay(C.int(delay))
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if r.theme != nil {
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C.start_color()
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initTheme(r.theme, r.defaultTheme(), r.forceBlack)
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initPairs(r.theme)
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C.bkgd(C.chtype(C.COLOR_PAIR(C.int(ColNormal.index()))))
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_colorFn = attrColored
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} else {
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initTheme(r.theme, nil, r.forceBlack)
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_colorFn = attrMono
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}
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C.nodelay(C.stdscr, true)
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ch := C.getch()
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if ch != C.ERR {
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C.ungetch(ch)
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}
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C.nodelay(C.stdscr, false)
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}
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func initPairs(theme *ColorTheme) {
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C.assume_default_colors(C.int(theme.Fg), C.int(theme.Bg))
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for _, pair := range []ColorPair{
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ColNormal,
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ColPrompt,
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ColMatch,
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ColCurrent,
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ColCurrentMatch,
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ColSpinner,
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ColInfo,
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ColCursor,
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ColSelected,
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ColHeader,
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ColBorder} {
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C.init_pair(C.short(pair.index()), C.short(pair.Fg()), C.short(pair.Bg()))
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}
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}
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func (r *FullscreenRenderer) Pause() {
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C.endwin()
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}
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func (r *FullscreenRenderer) Resume() bool {
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return false
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}
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func (r *FullscreenRenderer) Close() {
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C.endwin()
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C.delscreen(_screen)
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}
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func (r *FullscreenRenderer) NewWindow(top int, left int, width int, height int, border bool) Window {
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win := C.newwin(C.int(height), C.int(width), C.int(top), C.int(left))
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if r.theme != nil {
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C.wbkgd(win, C.chtype(C.COLOR_PAIR(C.int(ColNormal.index()))))
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}
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if border {
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pair, attr := _colorFn(ColBorder, 0)
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C.wcolor_set(win, pair, nil)
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C.wattron(win, attr)
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C.box(win, 0, 0)
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C.wattroff(win, attr)
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C.wcolor_set(win, 0, nil)
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}
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return &CursesWindow{
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impl: win,
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top: top,
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left: left,
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width: width,
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height: height,
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}
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}
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func attrColored(color ColorPair, a Attr) (C.short, C.int) {
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return C.short(color.index()), C.int(a)
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}
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func attrMono(color ColorPair, a Attr) (C.short, C.int) {
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return 0, C.int(attrFor(color, a))
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}
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func (r *FullscreenRenderer) MaxX() int {
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return int(C.COLS)
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}
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func (r *FullscreenRenderer) MaxY() int {
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return int(C.LINES)
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}
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func (w *CursesWindow) Close() {
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C.delwin(w.impl)
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}
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func (w *CursesWindow) Enclose(y int, x int) bool {
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return bool(C.wenclose(w.impl, C.int(y), C.int(x)))
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}
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func (w *CursesWindow) Move(y int, x int) {
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C.wmove(w.impl, C.int(y), C.int(x))
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}
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func (w *CursesWindow) MoveAndClear(y int, x int) {
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w.Move(y, x)
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C.wclrtoeol(w.impl)
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}
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func (w *CursesWindow) Print(text string) {
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C.waddstr(w.impl, C.CString(strings.Map(func(r rune) rune {
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if r < 32 {
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return -1
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}
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return r
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}, text)))
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}
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func (w *CursesWindow) CPrint(color ColorPair, attr Attr, text string) {
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p, a := _colorFn(color, attr)
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C.wcolor_set(w.impl, p, nil)
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C.wattron(w.impl, a)
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w.Print(text)
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C.wattroff(w.impl, a)
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C.wcolor_set(w.impl, 0, nil)
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}
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func (r *FullscreenRenderer) Clear() {
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C.clear()
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C.endwin()
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}
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func (r *FullscreenRenderer) Refresh() {
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C.refresh()
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}
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func (w *CursesWindow) Erase() {
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C.werase(w.impl)
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}
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func (w *CursesWindow) X() int {
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return int(C.c_getcurx(w.impl))
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}
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func (r *FullscreenRenderer) DoesAutoWrap() bool {
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return true
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}
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func (r *FullscreenRenderer) IsOptimized() bool {
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return true
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}
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func (w *CursesWindow) Fill(str string) FillReturn {
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if C.waddstr(w.impl, C.CString(str)) == C.OK {
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return FillContinue
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}
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return FillSuspend
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}
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func (w *CursesWindow) CFill(fg Color, bg Color, attr Attr, str string) FillReturn {
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index := ColorPair{fg, bg, -1}.index()
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C.wcolor_set(w.impl, C.short(index), nil)
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C.wattron(w.impl, C.int(attr))
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ret := w.Fill(str)
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C.wattroff(w.impl, C.int(attr))
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C.wcolor_set(w.impl, 0, nil)
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return ret
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}
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func (r *FullscreenRenderer) RefreshWindows(windows []Window) {
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for _, w := range windows {
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w.Refresh()
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}
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C.doupdate()
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}
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func (p ColorPair) index() int16 {
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if p.id >= 0 {
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return p.id
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}
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// ncurses does not support 24-bit colors
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if p.is24() {
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return ColDefault.index()
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}
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key := p.key()
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if found, prs := _colorMap[key]; prs {
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return found
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}
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id := int16(len(_colorMap)) + ColUser.id
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C.init_pair(C.short(id), C.short(p.Fg()), C.short(p.Bg()))
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_colorMap[key] = id
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return id
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}
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func consume(expects ...rune) bool {
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for _, r := range expects {
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if int(C.getch()) != int(r) {
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return false
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}
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}
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return true
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}
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func escSequence() Event {
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C.nodelay(C.stdscr, true)
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defer func() {
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C.nodelay(C.stdscr, false)
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}()
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c := C.getch()
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switch c {
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case C.ERR:
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return Event{ESC, 0, nil}
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case CtrlM:
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return Event{AltEnter, 0, nil}
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case '/':
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return Event{AltSlash, 0, nil}
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case ' ':
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return Event{AltSpace, 0, nil}
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case 127, C.KEY_BACKSPACE:
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return Event{AltBS, 0, nil}
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case '[':
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// Bracketed paste mode (printf "\e[?2004h")
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// \e[200~ TEXT \e[201~
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if consume('2', '0', '0', '~') {
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return Event{Invalid, 0, nil}
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}
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}
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if c >= 'a' && c <= 'z' {
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return Event{AltA + int(c) - 'a', 0, nil}
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}
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if c >= '0' && c <= '9' {
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return Event{Alt0 + int(c) - '0', 0, nil}
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}
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// Don't care. Ignore the rest.
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for ; c != C.ERR; c = C.getch() {
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}
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return Event{Invalid, 0, nil}
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}
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func (r *FullscreenRenderer) GetChar() Event {
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c := C.getch()
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switch c {
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case C.ERR:
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// Unexpected error from blocking read
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r.Close()
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errorExit("Failed to read /dev/tty")
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case C.KEY_UP:
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return Event{Up, 0, nil}
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case C.KEY_DOWN:
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return Event{Down, 0, nil}
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case C.KEY_LEFT:
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return Event{Left, 0, nil}
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case C.KEY_RIGHT:
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return Event{Right, 0, nil}
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case C.KEY_HOME:
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return Event{Home, 0, nil}
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case C.KEY_END:
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return Event{End, 0, nil}
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case C.KEY_BACKSPACE:
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return Event{BSpace, 0, nil}
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case C.KEY_F0 + 1:
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return Event{F1, 0, nil}
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case C.KEY_F0 + 2:
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return Event{F2, 0, nil}
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case C.KEY_F0 + 3:
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return Event{F3, 0, nil}
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case C.KEY_F0 + 4:
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return Event{F4, 0, nil}
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case C.KEY_F0 + 5:
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return Event{F5, 0, nil}
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case C.KEY_F0 + 6:
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return Event{F6, 0, nil}
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case C.KEY_F0 + 7:
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return Event{F7, 0, nil}
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case C.KEY_F0 + 8:
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return Event{F8, 0, nil}
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case C.KEY_F0 + 9:
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return Event{F9, 0, nil}
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case C.KEY_F0 + 10:
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return Event{F10, 0, nil}
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case C.KEY_F0 + 11:
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return Event{F11, 0, nil}
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case C.KEY_F0 + 12:
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return Event{F12, 0, nil}
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case C.KEY_DC:
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return Event{Del, 0, nil}
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case C.KEY_PPAGE:
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return Event{PgUp, 0, nil}
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case C.KEY_NPAGE:
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return Event{PgDn, 0, nil}
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case C.KEY_BTAB:
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return Event{BTab, 0, nil}
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case C.KEY_ENTER:
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return Event{CtrlM, 0, nil}
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case C.KEY_SLEFT:
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return Event{SLeft, 0, nil}
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case C.KEY_SRIGHT:
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return Event{SRight, 0, nil}
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case C.KEY_MOUSE:
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var me C.MEVENT
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if C.getmouse(&me) != C.ERR {
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mod := ((me.bstate & C.BUTTON_SHIFT) | (me.bstate & C.BUTTON_CTRL) | (me.bstate & C.BUTTON_ALT)) > 0
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x := int(me.x)
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y := int(me.y)
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/* Cannot use BUTTON1_DOUBLE_CLICKED due to mouseinterval(0) */
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if (me.bstate & C.BUTTON1_PRESSED) > 0 {
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now := time.Now()
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if now.Sub(r.prevDownTime) < doubleClickDuration {
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r.clickY = append(r.clickY, y)
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} else {
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r.clickY = []int{y}
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r.prevDownTime = now
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}
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return Event{Mouse, 0, &MouseEvent{y, x, 0, true, false, mod}}
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} else if (me.bstate & C.BUTTON1_RELEASED) > 0 {
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double := false
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if len(r.clickY) > 1 && r.clickY[0] == r.clickY[1] &&
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time.Now().Sub(r.prevDownTime) < doubleClickDuration {
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double = true
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}
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return Event{Mouse, 0, &MouseEvent{y, x, 0, false, double, mod}}
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} else if (me.bstate&0x8000000) > 0 || (me.bstate&0x80) > 0 {
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return Event{Mouse, 0, &MouseEvent{y, x, -1, false, false, mod}}
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} else if (me.bstate & C.BUTTON4_PRESSED) > 0 {
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return Event{Mouse, 0, &MouseEvent{y, x, 1, false, false, mod}}
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}
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}
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return Event{Invalid, 0, nil}
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case C.KEY_RESIZE:
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return Event{Resize, 0, nil}
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case ESC:
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return escSequence()
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case 127:
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return Event{BSpace, 0, nil}
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}
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// CTRL-A ~ CTRL-Z
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if c >= CtrlA && c <= CtrlZ {
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return Event{int(c), 0, nil}
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}
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// Multi-byte character
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buffer := []byte{byte(c)}
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for {
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r, _ := utf8.DecodeRune(buffer)
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if r != utf8.RuneError {
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return Event{Rune, r, nil}
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}
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c := C.getch()
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if c == C.ERR {
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break
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}
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if c >= C.KEY_CODE_YES {
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C.ungetch(c)
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break
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}
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buffer = append(buffer, byte(c))
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}
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return Event{Invalid, 0, nil}
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}
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