diff options
Diffstat (limited to 'vendor/github.com/peterh/liner/input_windows.go')
| -rw-r--r-- | vendor/github.com/peterh/liner/input_windows.go | 324 |
1 files changed, 324 insertions, 0 deletions
diff --git a/vendor/github.com/peterh/liner/input_windows.go b/vendor/github.com/peterh/liner/input_windows.go new file mode 100644 index 000000000..199b9428e --- /dev/null +++ b/vendor/github.com/peterh/liner/input_windows.go @@ -0,0 +1,324 @@ +package liner + +import ( + "bufio" + "os" + "syscall" + "unsafe" +) + +var ( + kernel32 = syscall.NewLazyDLL("kernel32.dll") + + procGetStdHandle = kernel32.NewProc("GetStdHandle") + procReadConsoleInput = kernel32.NewProc("ReadConsoleInputW") + procGetConsoleMode = kernel32.NewProc("GetConsoleMode") + procSetConsoleMode = kernel32.NewProc("SetConsoleMode") + procSetConsoleCursorPosition = kernel32.NewProc("SetConsoleCursorPosition") + procGetConsoleScreenBufferInfo = kernel32.NewProc("GetConsoleScreenBufferInfo") + procFillConsoleOutputCharacter = kernel32.NewProc("FillConsoleOutputCharacterW") +) + +// These names are from the Win32 api, so they use underscores (contrary to +// what golint suggests) +const ( + std_input_handle = uint32(-10 & 0xFFFFFFFF) + std_output_handle = uint32(-11 & 0xFFFFFFFF) + std_error_handle = uint32(-12 & 0xFFFFFFFF) + invalid_handle_value = ^uintptr(0) +) + +type inputMode uint32 + +// State represents an open terminal +type State struct { + commonState + handle syscall.Handle + hOut syscall.Handle + origMode inputMode + defaultMode inputMode + key interface{} + repeat uint16 +} + +const ( + enableEchoInput = 0x4 + enableInsertMode = 0x20 + enableLineInput = 0x2 + enableMouseInput = 0x10 + enableProcessedInput = 0x1 + enableQuickEditMode = 0x40 + enableWindowInput = 0x8 +) + +// NewLiner initializes a new *State, and sets the terminal into raw mode. To +// restore the terminal to its previous state, call State.Close(). +func NewLiner() *State { + var s State + hIn, _, _ := procGetStdHandle.Call(uintptr(std_input_handle)) + s.handle = syscall.Handle(hIn) + hOut, _, _ := procGetStdHandle.Call(uintptr(std_output_handle)) + s.hOut = syscall.Handle(hOut) + + s.terminalSupported = true + if m, err := TerminalMode(); err == nil { + s.origMode = m.(inputMode) + mode := s.origMode + mode &^= enableEchoInput + mode &^= enableInsertMode + mode &^= enableLineInput + mode &^= enableMouseInput + mode |= enableWindowInput + mode.ApplyMode() + } else { + s.inputRedirected = true + s.r = bufio.NewReader(os.Stdin) + } + + s.getColumns() + s.outputRedirected = s.columns <= 0 + + return &s +} + +// These names are from the Win32 api, so they use underscores (contrary to +// what golint suggests) +const ( + focus_event = 0x0010 + key_event = 0x0001 + menu_event = 0x0008 + mouse_event = 0x0002 + window_buffer_size_event = 0x0004 +) + +type input_record struct { + eventType uint16 + pad uint16 + blob [16]byte +} + +type key_event_record struct { + KeyDown int32 + RepeatCount uint16 + VirtualKeyCode uint16 + VirtualScanCode uint16 + Char int16 + ControlKeyState uint32 +} + +// These names are from the Win32 api, so they use underscores (contrary to +// what golint suggests) +const ( + vk_tab = 0x09 + vk_prior = 0x21 + vk_next = 0x22 + vk_end = 0x23 + vk_home = 0x24 + vk_left = 0x25 + vk_up = 0x26 + vk_right = 0x27 + vk_down = 0x28 + vk_insert = 0x2d + vk_delete = 0x2e + vk_f1 = 0x70 + vk_f2 = 0x71 + vk_f3 = 0x72 + vk_f4 = 0x73 + vk_f5 = 0x74 + vk_f6 = 0x75 + vk_f7 = 0x76 + vk_f8 = 0x77 + vk_f9 = 0x78 + vk_f10 = 0x79 + vk_f11 = 0x7a + vk_f12 = 0x7b + bKey = 0x42 + fKey = 0x46 + yKey = 0x59 +) + +const ( + shiftPressed = 0x0010 + leftAltPressed = 0x0002 + leftCtrlPressed = 0x0008 + rightAltPressed = 0x0001 + rightCtrlPressed = 0x0004 + + modKeys = shiftPressed | leftAltPressed | rightAltPressed | leftCtrlPressed | rightCtrlPressed +) + +func (s *State) readNext() (interface{}, error) { + if s.repeat > 0 { + s.repeat-- + return s.key, nil + } + + var input input_record + pbuf := uintptr(unsafe.Pointer(&input)) + var rv uint32 + prv := uintptr(unsafe.Pointer(&rv)) + + for { + ok, _, err := procReadConsoleInput.Call(uintptr(s.handle), pbuf, 1, prv) + + if ok == 0 { + return nil, err + } + + if input.eventType == window_buffer_size_event { + xy := (*coord)(unsafe.Pointer(&input.blob[0])) + s.columns = int(xy.x) + if s.columns > 1 { + s.columns-- + } + return winch, nil + } + if input.eventType != key_event { + continue + } + ke := (*key_event_record)(unsafe.Pointer(&input.blob[0])) + if ke.KeyDown == 0 { + continue + } + + if ke.VirtualKeyCode == vk_tab && ke.ControlKeyState&modKeys == shiftPressed { + s.key = shiftTab + } else if ke.VirtualKeyCode == bKey && (ke.ControlKeyState&modKeys == leftAltPressed || + ke.ControlKeyState&modKeys == rightAltPressed) { + s.key = altB + } else if ke.VirtualKeyCode == fKey && (ke.ControlKeyState&modKeys == leftAltPressed || + ke.ControlKeyState&modKeys == rightAltPressed) { + s.key = altF + } else if ke.VirtualKeyCode == yKey && (ke.ControlKeyState&modKeys == leftAltPressed || + ke.ControlKeyState&modKeys == rightAltPressed) { + s.key = altY + } else if ke.Char > 0 { + s.key = rune(ke.Char) + } else { + switch ke.VirtualKeyCode { + case vk_prior: + s.key = pageUp + case vk_next: + s.key = pageDown + case vk_end: + s.key = end + case vk_home: + s.key = home + case vk_left: + s.key = left + if ke.ControlKeyState&(leftCtrlPressed|rightCtrlPressed) != 0 { + if ke.ControlKeyState&modKeys == ke.ControlKeyState&(leftCtrlPressed|rightCtrlPressed) { + s.key = wordLeft + } + } + case vk_right: + s.key = right + if ke.ControlKeyState&(leftCtrlPressed|rightCtrlPressed) != 0 { + if ke.ControlKeyState&modKeys == ke.ControlKeyState&(leftCtrlPressed|rightCtrlPressed) { + s.key = wordRight + } + } + case vk_up: + s.key = up + case vk_down: + s.key = down + case vk_insert: + s.key = insert + case vk_delete: + s.key = del + case vk_f1: + s.key = f1 + case vk_f2: + s.key = f2 + case vk_f3: + s.key = f3 + case vk_f4: + s.key = f4 + case vk_f5: + s.key = f5 + case vk_f6: + s.key = f6 + case vk_f7: + s.key = f7 + case vk_f8: + s.key = f8 + case vk_f9: + s.key = f9 + case vk_f10: + s.key = f10 + case vk_f11: + s.key = f11 + case vk_f12: + s.key = f12 + default: + // Eat modifier keys + // TODO: return Action(Unknown) if the key isn't a + // modifier. + continue + } + } + + if ke.RepeatCount > 1 { + s.repeat = ke.RepeatCount - 1 + } + return s.key, nil + } + return unknown, nil +} + +// Close returns the terminal to its previous mode +func (s *State) Close() error { + s.origMode.ApplyMode() + return nil +} + +func (s *State) startPrompt() { + if m, err := TerminalMode(); err == nil { + s.defaultMode = m.(inputMode) + mode := s.defaultMode + mode &^= enableProcessedInput + mode.ApplyMode() + } +} + +func (s *State) restartPrompt() { +} + +func (s *State) stopPrompt() { + s.defaultMode.ApplyMode() +} + +// TerminalSupported returns true because line editing is always +// supported on Windows. +func TerminalSupported() bool { + return true +} + +func (mode inputMode) ApplyMode() error { + hIn, _, err := procGetStdHandle.Call(uintptr(std_input_handle)) + if hIn == invalid_handle_value || hIn == 0 { + return err + } + ok, _, err := procSetConsoleMode.Call(hIn, uintptr(mode)) + if ok != 0 { + err = nil + } + return err +} + +// TerminalMode returns the current terminal input mode as an InputModeSetter. +// +// This function is provided for convenience, and should +// not be necessary for most users of liner. +func TerminalMode() (ModeApplier, error) { + var mode inputMode + hIn, _, err := procGetStdHandle.Call(uintptr(std_input_handle)) + if hIn == invalid_handle_value || hIn == 0 { + return nil, err + } + ok, _, err := procGetConsoleMode.Call(hIn, uintptr(unsafe.Pointer(&mode))) + if ok != 0 { + err = nil + } + return mode, err +} |