parent
43e8efe895
commit
f413a3dbb2
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@ -55,3 +55,5 @@ func (n noopMode) ApplyMode() error {
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func TerminalMode() (ModeApplier, error) {
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return noopMode{}, nil
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}
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const cursorColumn = true
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@ -0,0 +1,3 @@
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module github.com/peterh/liner
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require github.com/mattn/go-runewidth v0.0.3
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@ -0,0 +1,2 @@
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github.com/mattn/go-runewidth v0.0.3 h1:a+kO+98RDGEfo6asOGMmpodZq4FNtnGP54yps8BzLR4=
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github.com/mattn/go-runewidth v0.0.3/go.mod h1:LwmH8dsx7+W8Uxz3IHJYH5QSwggIsqBzpuz5H//U1FU=
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@ -264,9 +264,9 @@ func (s *State) readNext() (interface{}, error) {
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return pageUp, nil
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case 6:
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return pageDown, nil
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case 7:
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case 1, 7:
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return home, nil
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case 8:
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case 4, 8:
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return end, nil
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case 15:
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return f5, nil
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@ -328,6 +328,9 @@ func (s *State) readNext() (interface{}, error) {
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case 'b':
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s.pending = s.pending[:0] // escape code complete
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return altB, nil
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case 'd':
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s.pending = s.pending[:0] // escape code complete
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return altD, nil
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case 'f':
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s.pending = s.pending[:0] // escape code complete
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return altF, nil
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@ -4,6 +4,7 @@ import (
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"bufio"
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"os"
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"syscall"
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"unicode/utf16"
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"unsafe"
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)
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@ -103,7 +104,7 @@ type key_event_record struct {
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RepeatCount uint16
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VirtualKeyCode uint16
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VirtualScanCode uint16
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Char int16
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Char uint16
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ControlKeyState uint32
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}
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@ -111,6 +112,7 @@ type key_event_record struct {
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// what golint suggests)
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const (
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vk_tab = 0x09
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vk_menu = 0x12 // ALT key
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vk_prior = 0x21
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vk_next = 0x22
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vk_end = 0x23
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@ -134,6 +136,7 @@ const (
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vk_f11 = 0x7a
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vk_f12 = 0x7b
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bKey = 0x42
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dKey = 0x44
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fKey = 0x46
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yKey = 0x59
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)
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@ -174,6 +177,8 @@ func (s *State) readNext() (interface{}, error) {
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var rv uint32
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prv := uintptr(unsafe.Pointer(&rv))
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var surrogate uint16
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for {
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ok, _, err := procReadConsoleInput.Call(uintptr(s.handle), pbuf, 1, prv)
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@ -184,9 +189,6 @@ func (s *State) readNext() (interface{}, error) {
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if input.eventType == window_buffer_size_event {
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xy := (*coord)(unsafe.Pointer(&input.blob[0]))
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s.columns = int(xy.x)
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if s.columns > 1 {
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s.columns--
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}
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return winch, nil
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}
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if input.eventType != key_event {
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@ -194,6 +196,17 @@ func (s *State) readNext() (interface{}, error) {
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}
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ke := (*key_event_record)(unsafe.Pointer(&input.blob[0]))
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if ke.KeyDown == 0 {
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if ke.VirtualKeyCode == vk_menu && ke.Char > 0 {
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// paste of unicode (eg. via ALT-numpad)
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if surrogate > 0 {
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return utf16.DecodeRune(rune(surrogate), rune(ke.Char)), nil
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} else if utf16.IsSurrogate(rune(ke.Char)) {
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surrogate = ke.Char
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continue
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} else {
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return rune(ke.Char), nil
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}
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}
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continue
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}
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@ -202,6 +215,9 @@ func (s *State) readNext() (interface{}, error) {
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} else if ke.VirtualKeyCode == bKey && (ke.ControlKeyState&modKeys == leftAltPressed ||
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ke.ControlKeyState&modKeys == rightAltPressed) {
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s.key = altB
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} else if ke.VirtualKeyCode == dKey && (ke.ControlKeyState&modKeys == leftAltPressed ||
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ke.ControlKeyState&modKeys == rightAltPressed) {
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s.key = altD
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} else if ke.VirtualKeyCode == fKey && (ke.ControlKeyState&modKeys == leftAltPressed ||
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ke.ControlKeyState&modKeys == rightAltPressed) {
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s.key = altF
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@ -209,7 +225,14 @@ func (s *State) readNext() (interface{}, error) {
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ke.ControlKeyState&modKeys == rightAltPressed) {
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s.key = altY
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} else if ke.Char > 0 {
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if surrogate > 0 {
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s.key = utf16.DecodeRune(rune(surrogate), rune(ke.Char))
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} else if utf16.IsSurrogate(rune(ke.Char)) {
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surrogate = ke.Char
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continue
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} else {
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s.key = rune(ke.Char)
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}
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} else {
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switch ke.VirtualKeyCode {
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case vk_prior:
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@ -337,3 +360,5 @@ func TerminalMode() (ModeApplier, error) {
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}
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return mode, err
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}
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const cursorColumn = true
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@ -40,6 +40,7 @@ const (
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f11
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f12
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altB
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altD
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altF
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altY
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shiftTab
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@ -112,6 +113,10 @@ func (s *State) refreshSingleLine(prompt []rune, buf []rune, pos int) error {
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pLen := countGlyphs(prompt)
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bLen := countGlyphs(buf)
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// on some OS / terminals extra column is needed to place the cursor char
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if cursorColumn {
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bLen++
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}
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pos = countGlyphs(buf[:pos])
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if pLen+bLen < s.columns {
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_, err = fmt.Print(string(buf))
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@ -162,6 +167,14 @@ func (s *State) refreshSingleLine(prompt []rune, buf []rune, pos int) error {
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func (s *State) refreshMultiLine(prompt []rune, buf []rune, pos int) error {
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promptColumns := countMultiLineGlyphs(prompt, s.columns, 0)
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totalColumns := countMultiLineGlyphs(buf, s.columns, promptColumns)
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// on some OS / terminals extra column is needed to place the cursor char
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// if cursorColumn {
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// totalColumns++
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// }
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// it looks like Multiline mode always assume that a cursor need an extra column,
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// and always emit a newline if we are at the screen end, so no worarounds needed there
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totalRows := (totalColumns + s.columns - 1) / s.columns
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maxRows := s.maxRows
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if totalRows > s.maxRows {
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@ -583,7 +596,7 @@ func (s *State) Prompt(prompt string) (string, error) {
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// PromptWithSuggestion displays prompt and an editable text with cursor at
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// given position. The cursor will be set to the end of the line if given position
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// is negative or greater than length of text. Returns a line of user input, not
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// is negative or greater than length of text (in runes). Returns a line of user input, not
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// including a trailing newline character. An io.EOF error is returned if the user
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// signals end-of-file by pressing Ctrl-D.
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func (s *State) PromptWithSuggestion(prompt string, text string, pos int) (string, error) {
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@ -618,8 +631,8 @@ func (s *State) PromptWithSuggestion(prompt string, text string, pos int) (strin
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defer s.stopPrompt()
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if pos < 0 || len(text) < pos {
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pos = len(text)
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if pos < 0 || len(line) < pos {
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pos = len(line)
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}
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if len(line) > 0 {
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err := s.refresh(p, line, pos)
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pos = 0
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case end: // End of line
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pos = len(line)
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case altD: // Delete next word
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if pos == len(line) {
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fmt.Print(beep)
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break
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}
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// Remove whitespace to the right
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var buf []rune // Store the deleted chars in a buffer
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for {
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if pos == len(line) || !unicode.IsSpace(line[pos]) {
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break
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}
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buf = append(buf, line[pos])
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line = append(line[:pos], line[pos+1:]...)
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}
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// Remove non-whitespace to the right
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for {
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if pos == len(line) || unicode.IsSpace(line[pos]) {
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break
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}
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buf = append(buf, line[pos])
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line = append(line[:pos], line[pos+1:]...)
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}
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// Save the result on the killRing
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if killAction > 0 {
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s.addToKillRing(buf, 2) // Add in prepend mode
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} else {
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s.addToKillRing(buf, 0) // Add in normal mode
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}
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killAction = 2 // Mark that there was some killing
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case winch: // Window change
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if s.multiLineMode {
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if s.maxRows-s.cursorRows > 0 {
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@ -56,9 +56,6 @@ func (s *State) getColumns() bool {
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return false
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}
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s.columns = int(ws.col)
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if cursorColumn && s.columns > 1 {
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s.columns--
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}
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return true
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}
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@ -69,8 +69,4 @@ func (s *State) getColumns() {
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var sbi consoleScreenBufferInfo
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procGetConsoleScreenBufferInfo.Call(uintptr(s.hOut), uintptr(unsafe.Pointer(&sbi)))
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s.columns = int(sbi.dwSize.x)
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if s.columns > 1 {
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// Windows 10 needs a spare column for the cursor
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s.columns--
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}
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}
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@ -1,6 +1,10 @@
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package liner
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import "unicode"
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import (
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"unicode"
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"github.com/mattn/go-runewidth"
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)
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// These character classes are mostly zero width (when combined).
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// A few might not be, depending on the user's font. Fixing this
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unicode.Cf,
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}
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var doubleWidth = []*unicode.RangeTable{
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unicode.Han,
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unicode.Hangul,
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unicode.Hiragana,
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unicode.Katakana,
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}
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// countGlyphs considers zero-width characters to be zero glyphs wide,
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// and members of Chinese, Japanese, and Korean scripts to be 2 glyphs wide.
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func countGlyphs(s []rune) int {
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@ -31,13 +28,7 @@ func countGlyphs(s []rune) int {
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continue
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}
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switch {
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case unicode.IsOneOf(zeroWidth, r):
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case unicode.IsOneOf(doubleWidth, r):
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n += 2
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default:
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n++
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}
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n += runewidth.RuneWidth(r)
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}
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return n
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}
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n++
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continue
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}
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switch {
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case unicode.IsOneOf(zeroWidth, r):
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case unicode.IsOneOf(doubleWidth, r):
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switch runewidth.RuneWidth(r) {
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case 0:
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case 1:
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n++
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case 2:
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n += 2
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// no room for a 2-glyphs-wide char in the ending
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// so skip a column and display it at the beginning
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if n%columns == 1 {
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n++
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}
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default:
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n++
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}
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}
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return n
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@ -359,10 +359,10 @@
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"revisionTime": "2017-01-12T15:04:04Z"
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},
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{
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"checksumSHA1": "lSRg5clrIZUxq4aaExbpnpAgtWA=",
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"checksumSHA1": "fGwQlTsml12gzgbWjOyyKPzbMD8=",
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"path": "github.com/peterh/liner",
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"revision": "a37ad39843113264dae84a5d89fcee28f50b35c6",
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"revisionTime": "2017-09-02T20:46:57Z"
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"revision": "a2c9a5303de792c7581a3b80a8f10258319bb20e",
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"revisionTime": "2019-01-23T17:38:45Z"
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},
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{
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"checksumSHA1": "xCv4GBFyw07vZkVtKF/XrUnkHRk=",
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