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normalmode.go
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normalmode.go
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package main
import (
"fmt"
"os/exec"
"strconv"
"strings"
"github.com/gdamore/tcell/v2"
"github.com/kybin/tor/syntax"
)
// NormalMode is a mode for text editing.
type NormalMode struct {
text *Text
cursor *Cursor
selection *Selection
history *History
f string
dirty bool // dirty indicates if it is drawed after text edited
parser *syntax.Parser
copied string
status string
err string
area *Area
}
// Start prepare things to start a normal mode.
func (m *NormalMode) Start() {}
// End prepare things to end a normal mode.
func (m *NormalMode) End() {}
// Handle handles a terminal event.
// It will run appropriate actions, and save it in history.
func (m *NormalMode) Handle(ev *tcell.EventKey) {
m.status = ""
m.err = ""
rememberActions := make([]*Action, 0)
cut := false
actions := m.parseEvent(ev)
for _, a := range actions {
// in read-only mode, tor only accepts move and exit.
if !m.text.writable && a.kind != "move" && a.kind != "exit" {
continue
}
m.do(a)
a.text = m.text
// delete selection usally don't delete anything.
if a.kind == "delete" && a.value == "" {
continue
}
// skip action types that are not specified below.
switch a.kind {
case "insert", "paste", "delete", "backspace", "insertTab", "removeTab", "move":
if a.kind != "move" {
m.text.edited = true
m.dirty = true
}
nc := m.history.Cut(m.history.head)
if nc != 0 {
cut = true
}
default:
if a.kind == "unread" || a.kind == "redo" || a.kind == "save" {
m.dirty = true // maybe
}
continue
}
// joining repeative same kind of actions.
if a.kind == "insert" || a.kind == "paste" || a.kind == "delete" || a.kind == "backspace" || a.kind == "move" {
var last *Action
if len(rememberActions) != 0 {
last = rememberActions[len(rememberActions)-1]
} else if !cut && m.history.Len() != 0 {
lastGroup := m.history.Last()
last = lastGroup[len(lastGroup)-1]
}
if last != nil && a.kind == last.kind {
if last.kind == "insert" || a.kind == "paste" || a.kind == "delete" {
last.value = last.value + a.value
} else if a.kind == "backspace" {
last.value = a.value + last.value
}
last.afterCursor = a.afterCursor
continue
}
}
rememberActions = append(rememberActions, a)
}
if len(rememberActions) != 0 {
m.history.Add(rememberActions)
}
}
// parseEvent parses a terminal event and return actions.
func (m *NormalMode) parseEvent(ev *tcell.EventKey) []*Action {
switch ev.Key() {
case tcell.KeyCtrlQ:
return []*Action{{kind: "selection", value: "off"}, {kind: "exit"}}
case tcell.KeyCtrlS:
return []*Action{{kind: "selection", value: "off"}, {kind: "save"}}
case tcell.KeyCtrlK:
return []*Action{{kind: "selection", value: "off"}}
// move
case tcell.KeyLeft:
return []*Action{{kind: "selection", value: "off"}, {kind: "move", value: "left"}}
case tcell.KeyRight:
return []*Action{{kind: "selection", value: "off"}, {kind: "move", value: "right"}}
case tcell.KeyUp:
return []*Action{{kind: "selection", value: "off"}, {kind: "move", value: "up"}}
case tcell.KeyDown:
return []*Action{{kind: "selection", value: "off"}, {kind: "move", value: "down"}}
case tcell.KeyPgUp:
return []*Action{{kind: "selection", value: "off"}, {kind: "move", value: "pageup"}}
case tcell.KeyPgDn:
return []*Action{{kind: "selection", value: "off"}, {kind: "move", value: "pagedown"}}
case tcell.KeyHome:
return []*Action{{kind: "selection", value: "off"}, {kind: "move", value: "bol"}}
case tcell.KeyEnd:
return []*Action{{kind: "selection", value: "off"}, {kind: "move", value: "eol"}}
// insert
case tcell.KeyEnter:
return []*Action{{kind: "delete", value: "selection"}, {kind: "insert", value: "\n"}}
case tcell.KeyCtrlN:
if ev.Modifiers()&tcell.ModAlt != 0 {
return []*Action{{kind: "selection", value: "off"}, {kind: "move", value: "eol"}, {kind: "insert", value: "\n"}, {kind: "insert", value: "autoIndent"}}
}
return []*Action{{kind: "delete", value: "selection"}, {kind: "insert", value: "\n"}, {kind: "insert", value: "autoIndent"}}
case tcell.KeyTab:
tab := "\t"
if m.text.tabToSpace {
tab = strings.Repeat(" ", m.text.tabWidth)
}
return []*Action{{kind: "delete", value: "selection"}, {kind: "insert", value: tab}}
case tcell.KeyCtrlU:
return []*Action{{kind: "removeTab"}}
case tcell.KeyCtrlO:
return []*Action{{kind: "insertTab"}}
// delete : value will added after actual deletion.
case tcell.KeyDelete:
if m.selection.on {
return []*Action{{kind: "delete", value: "selection"}}
} else {
if ev.Modifiers()&tcell.ModAlt != 0 {
return []*Action{{kind: "selection", value: "on"}, {kind: "move", value: "nextBowEow"}, {kind: "delete", value: "selection"}}
}
return []*Action{{kind: "delete"}}
}
case tcell.KeyBackspace, tcell.KeyBackspace2:
if m.selection.on {
return []*Action{{kind: "delete", value: "selection"}}
} else {
if ev.Modifiers()&tcell.ModAlt != 0 {
return []*Action{{kind: "selection", value: "on"}, {kind: "move", value: "prevBowEow"}, {kind: "delete", value: "selection"}}
}
return []*Action{{kind: "backspace"}}
}
// undo, redo
case tcell.KeyCtrlZ:
return []*Action{{kind: "undo"}}
case tcell.KeyCtrlY:
return []*Action{{kind: "redo"}}
// copy, paste, cut
case tcell.KeyCtrlC:
if m.selection.on {
return []*Action{{kind: "copy"}, {kind: "selection", value: "off"}}
} else {
return []*Action{}
}
case tcell.KeyCtrlV:
if m.selection.on {
return []*Action{{kind: "delete", value: "selection"}, {kind: "insert", value: m.copied}}
}
return []*Action{{kind: "insert", value: m.copied}}
case tcell.KeyCtrlP:
if m.selection.on {
return []*Action{{kind: "delete", value: "selection"}, {kind: "paste", value: m.copied}}
}
return []*Action{{kind: "paste", value: m.copied}}
case tcell.KeyCtrlJ:
if m.selection.on {
return []*Action{{kind: "delete", value: "selection"}, {kind: "insert", value: tor.replace.str}}
}
return []*Action{}
case tcell.KeyCtrlX:
if m.selection.on {
return []*Action{{kind: "copy"}, {kind: "delete", value: "selection"}}
} else {
return []*Action{{kind: "copy"}, {kind: "delete"}}
}
// find
case tcell.KeyCtrlD, tcell.KeyF3:
return []*Action{{kind: "selection", value: "off"}, {kind: "move", value: "findNextSelect"}}
case tcell.KeyCtrlB, tcell.KeyF2:
return []*Action{{kind: "selection", value: "off"}, {kind: "move", value: "findPrevSelect"}}
case tcell.KeyCtrlF:
return []*Action{{kind: "modeChange", value: "find"}}
case tcell.KeyCtrlR:
return []*Action{{kind: "modeChange", value: "replace"}}
case tcell.KeyCtrlG:
return []*Action{{kind: "modeChange", value: "gotoline"}}
case tcell.KeyCtrlA:
return []*Action{{kind: "selectAll"}}
case tcell.KeyCtrlL:
return []*Action{{kind: "selectLine"}}
default:
if ev.Rune() == 0 {
return []*Action{}
}
if ev.Modifiers()&tcell.ModAlt != 0 {
switch ev.Rune() {
case 'j':
return []*Action{{kind: "move", value: "selLeft"}, {kind: "selection", value: "off"}}
case 'J':
return []*Action{{kind: "selection", value: "on"}, {kind: "move", value: "left"}}
case 'l':
return []*Action{{kind: "move", value: "selRight"}, {kind: "selection", value: "off"}}
case 'L':
return []*Action{{kind: "selection", value: "on"}, {kind: "move", value: "right"}}
case 'i':
return []*Action{{kind: "selection", value: "off"}, {kind: "move", value: "up"}}
case 'I':
return []*Action{{kind: "selection", value: "on"}, {kind: "move", value: "up"}}
case 'k':
return []*Action{{kind: "selection", value: "off"}, {kind: "move", value: "down"}}
case 'K':
return []*Action{{kind: "selection", value: "on"}, {kind: "move", value: "down"}}
case 'm':
return []*Action{{kind: "selection", value: "off"}, {kind: "move", value: "prevBowEow"}}
case 'M':
return []*Action{{kind: "selection", value: "on"}, {kind: "move", value: "prevBowEow"}}
case '.':
return []*Action{{kind: "selection", value: "off"}, {kind: "move", value: "nextBowEow"}}
case '>':
return []*Action{{kind: "selection", value: "on"}, {kind: "move", value: "nextBowEow"}}
case 'u':
return []*Action{{kind: "selection", value: "off"}, {kind: "move", value: "bocBolRepeat"}}
case 'U':
return []*Action{{kind: "selection", value: "on"}, {kind: "move", value: "bocBolRepeat"}}
case 'y':
return []*Action{{kind: "selection", value: "off"}, {kind: "move", value: "bol"}}
case 'Y':
return []*Action{{kind: "selection", value: "on"}, {kind: "move", value: "bol"}}
case 'o':
return []*Action{{kind: "selection", value: "off"}, {kind: "move", value: "eol"}}
case 'O':
return []*Action{{kind: "selection", value: "on"}, {kind: "move", value: "eol"}}
case 'w':
return []*Action{{kind: "selection", value: "off"}, {kind: "move", value: "pageup"}}
case 'W':
return []*Action{{kind: "selection", value: "on"}, {kind: "move", value: "pageup"}}
case 's':
return []*Action{{kind: "selection", value: "off"}, {kind: "move", value: "pagedown"}}
case 'S':
return []*Action{{kind: "selection", value: "on"}, {kind: "move", value: "pagedown"}}
case 'e':
return []*Action{{kind: "selection", value: "off"}, {kind: "move", value: "bof"}}
case 'E':
return []*Action{{kind: "selection", value: "on"}, {kind: "move", value: "bof"}}
case 'd':
return []*Action{{kind: "selection", value: "off"}, {kind: "move", value: "eof"}}
case 'D':
return []*Action{{kind: "selection", value: "on"}, {kind: "move", value: "eof"}}
case '1':
return []*Action{{kind: "selection", value: "off"}, {kind: "move", value: "prevGlobal"}}
case '!':
return []*Action{{kind: "selection", value: "on"}, {kind: "move", value: "prevGlobal"}}
case '2':
return []*Action{{kind: "selection", value: "off"}, {kind: "move", value: "nextGlobal"}}
case '@':
return []*Action{{kind: "selection", value: "on"}, {kind: "move", value: "nextGlobal"}}
case '9':
return []*Action{{kind: "selection", value: "off"}, {kind: "move", value: "prevGlobal"}}
case '(':
return []*Action{{kind: "selection", value: "on"}, {kind: "move", value: "prevGlobal"}}
case '0':
return []*Action{{kind: "selection", value: "off"}, {kind: "move", value: "nextGlobal"}}
case ')':
return []*Action{{kind: "selection", value: "on"}, {kind: "move", value: "nextGlobal"}}
case 'q':
return []*Action{{kind: "selection", value: "off"}, {kind: "move", value: "prevIndentMatch"}}
case 'Q':
return []*Action{{kind: "selection", value: "on"}, {kind: "move", value: "prevIndentMatch"}}
case 'a':
return []*Action{{kind: "selection", value: "off"}, {kind: "move", value: "nextIndentMatch"}}
case 'A':
return []*Action{{kind: "selection", value: "on"}, {kind: "move", value: "nextIndentMatch"}}
case ']', 'x':
return []*Action{{kind: "selection", value: "off"}, {kind: "move", value: "nextArg"}}
case '}', 'X':
return []*Action{{kind: "selection", value: "on"}, {kind: "move", value: "nextArg"}}
case '[', 'z':
return []*Action{{kind: "selection", value: "off"}, {kind: "move", value: "prevArg"}}
case '{', 'Z':
return []*Action{{kind: "selection", value: "on"}, {kind: "move", value: "prevArg"}}
case 'c':
return []*Action{{kind: "selection", value: "off"}, {kind: "move", value: "matchingBracket"}}
case 'C':
return []*Action{{kind: "selection", value: "on"}, {kind: "move", value: "matchingBracket"}}
default:
return []*Action{}
}
}
// key pressed without modifier
if m.selection.on {
return []*Action{{kind: "delete", value: "selection"}, {kind: "insert", value: string(ev.Rune())}}
} else {
return []*Action{{kind: "insert", value: string(ev.Rune())}}
}
}
}
// do takes an action and do it.
// After done the action, it will save result on the action.
func (m *NormalMode) do(a *Action) {
a.beforeCursor = *m.cursor
defer func() {
a.afterCursor = *m.cursor
if m.selection.on {
m.selection.SetEnd(m.cursor.BytePos())
}
}()
switch a.kind {
case "exit":
tor.ChangeMode(tor.exit)
case "save":
err := save(m.f, m.text)
if err != nil {
m.err = fmt.Sprintf("FAIL TO SAVE: %v", err)
return
}
m.text.edited = false
m.status = fmt.Sprintf("successfully saved: %v", m.f)
// post save
if strings.HasSuffix(m.f, ".go") {
cmdGroups := []cmdGroup{
{
kind: orCmdGroup,
cmds: []*exec.Cmd{
exec.Command("goimports", "-w", m.f),
exec.Command("go", "fmt", m.f),
},
},
}
for _, g := range cmdGroups {
out, err := g.CombinedOutput()
if err != nil {
outs := strings.Split(string(out), "\n")
if len(outs) == 0 {
m.err = fmt.Sprint(err)
} else {
m.err = outs[0]
}
return
}
}
// reload the file.
text, err := read(m.f)
if err != nil {
m.err = fmt.Sprint(err)
return
}
m.text = text
m.cursor.text = text
m.selection.text = text
m.parser.SetText(text)
oldl := m.cursor.l
oldb := m.cursor.b
m.cursor.GotoLine(oldl)
m.cursor.SetCloseToB(oldb)
}
case "copy":
if m.selection.on {
minc, maxc := m.selection.MinMax()
m.copied = m.text.DataInside(minc, maxc)
} else {
r, _ := m.cursor.RuneAfter()
m.copied = string(r)
}
saveConfig("copy", m.copied)
case "modeChange":
if a.value == "find" {
tor.ChangeMode(tor.find)
} else if a.value == "replace" {
tor.ChangeMode(tor.replace)
} else if a.value == "gotoline" {
tor.ChangeMode(tor.gotoline)
}
case "selection":
if a.value == "on" && !m.selection.on {
m.selection.on = true
m.selection.SetStart(m.cursor.BytePos())
} else if a.value == "off" {
m.selection.on = false
}
case "move":
switch a.value {
case "left":
m.cursor.MoveLeft()
case "right":
m.cursor.MoveRight()
case "selLeft":
if m.selection.on {
m.cursor.SetBytePos(m.selection.Min())
} else {
m.cursor.MoveLeft()
}
case "selRight":
if m.selection.on {
m.cursor.SetBytePos(m.selection.Max())
} else {
m.cursor.MoveRight()
}
case "up":
m.cursor.MoveUp()
case "down":
m.cursor.MoveDown()
case "prevBowEow":
m.cursor.MovePrevBowEow()
case "nextBowEow":
m.cursor.MoveNextBowEow()
case "bol":
m.cursor.MoveBol()
case "eol":
m.cursor.MoveEol()
case "bocBolRepeat":
m.cursor.MoveBocBolRepeat()
case "pageup":
m.cursor.PageUp()
case "pagedown":
m.cursor.PageDown()
case "bof":
m.cursor.MoveBof()
case "eof":
m.cursor.MoveEof()
case "nextGlobal":
m.cursor.GotoNextGlobalLine()
case "prevGlobal":
m.cursor.GotoPrevGlobalLine()
case "prevIndentMatch":
m.cursor.GotoPrevIndentMatch()
case "nextIndentMatch":
m.cursor.GotoNextIndentMatch()
case "nextArg":
m.cursor.GotoNextAny("{(,)}")
r, _ := m.cursor.RuneAfter()
if r == '(' || r == '{' {
m.cursor.MoveRight()
}
case "prevArg":
r, _ := m.cursor.RuneBefore()
if r == '(' || r == '{' {
m.cursor.MoveLeft()
}
m.cursor.GotoPrevAny("{(,)}")
r, _ = m.cursor.RuneAfter()
if r == '(' || r == '{' {
m.cursor.MoveRight()
}
case "matchingBracket":
m.cursor.GotoMatchingBracket()
case "findPrev":
ok := m.cursor.GotoPrev(tor.find.str)
if !ok {
m.cursor.GotoLast(tor.find.str)
}
case "findNext":
ok := m.cursor.GotoNext(tor.find.str)
if !ok {
m.cursor.GotoFirst(tor.find.str)
}
case "findPrevWord":
m.cursor.GotoPrevWord(tor.find.str)
case "findNextWord":
m.cursor.GotoNextWord(tor.find.str)
// TODO: "findPrevSelect" and "findNextSelect" are hack. make separate action.
case "findPrevSelect":
ok := m.cursor.GotoPrev(tor.find.str)
if !ok {
ok = m.cursor.GotoLast(tor.find.str)
}
if ok {
m.selection.on = true
for range tor.find.str {
m.cursor.MoveRight()
}
m.selection.SetStart(m.cursor.BytePos())
for range tor.find.str {
m.cursor.MoveLeft()
}
m.selection.SetEnd(m.cursor.BytePos())
}
case "findNextSelect":
ok := m.cursor.GotoNext(tor.find.str)
if !ok {
ok = m.cursor.GotoFirst(tor.find.str)
}
if ok {
m.selection.on = true
for range tor.find.str {
m.cursor.MoveRight()
}
m.selection.SetStart(m.cursor.BytePos())
for range tor.find.str {
m.cursor.MoveLeft()
}
m.selection.SetEnd(m.cursor.BytePos())
}
default:
panic(fmt.Sprintln("what the..", a.value, "move?"))
}
case "insert":
if a.value == "autoIndent" {
prevline := m.text.lines[m.cursor.l-1].data
trimed := strings.TrimLeft(prevline, " \t")
indent := prevline[:len(prevline)-len(trimed)]
m.cursor.Insert(indent)
a.value = indent
return
}
m.cursor.Insert(a.value)
case "paste":
c := *m.cursor
m.cursor.Insert(a.value)
m.cursor.Copy(c)
case "delete":
if a.value == "selection" {
if m.selection.on {
m.cursor.SetBytePos(m.selection.Min())
a.beforeCursor = *m.cursor // rewrite before cursor.
}
a.value = m.selection.Data()
for range a.value {
m.cursor.Delete()
}
m.selection.on = false
} else {
a.value = m.cursor.Delete()
}
case "insertTab":
tab := "\t"
if m.text.tabToSpace {
tab = strings.Repeat(" ", m.text.tabWidth)
}
lines := make([]int, 0)
if m.selection.on {
for _, l := range m.selection.Lines() {
if m.text.Line(l).data != "" {
lines = append(lines, l)
}
}
} else {
lines = append(lines, m.cursor.l)
}
tabedLine := ""
for _, l := range lines {
m.text.Line(l).Insert(tab, 0)
if tabedLine != "" {
tabedLine += ","
}
tabedLine += strconv.Itoa(l) + ":" + tab
if l == m.cursor.l {
m.cursor.SetB(m.cursor.b + len(tab))
}
}
a.value = tabedLine
case "removeTab":
// removeTab is slightly differ from insertTab.
// removeTab should remember what is removed, not tab string it self.
lines := make([]int, 0)
if m.selection.on {
lines = m.selection.Lines()
} else {
lines = append(lines, m.cursor.l)
}
untabedLine := ""
for _, l := range lines {
removed := ""
if strings.HasPrefix(m.text.Line(l).data, "\t") {
removed += m.text.Line(l).Remove(0, 1)
} else {
for i := 0; i < m.text.tabWidth; i++ {
if len(m.text.Line(l).data) == 0 {
break
}
if !strings.HasPrefix(m.text.Line(l).data, " ") {
break
}
removed += m.text.Line(l).Remove(0, 1)
}
}
if untabedLine != "" {
untabedLine += ","
}
untabedLine += strconv.Itoa(l) + ":" + removed
if l == m.cursor.l && !m.cursor.AtBol() {
b := m.cursor.b - len(removed)
if b < 0 {
b = 0
}
m.cursor.SetB(b)
}
}
a.value = untabedLine
case "backspace":
a.value = m.cursor.Backspace()
case "selectAll":
m.cursor.MoveBof()
m.selection.on = true
m.selection.SetStart(m.cursor.BytePos())
m.cursor.MoveEof()
m.selection.SetEnd(m.cursor.BytePos())
case "selectLine":
m.cursor.MoveBol()
if !m.selection.on {
m.selection.on = true
m.selection.SetStart(m.cursor.BytePos())
}
if m.cursor.OnLastLine() {
m.cursor.MoveEol()
} else {
m.cursor.MoveDown()
}
m.selection.SetEnd(m.cursor.BytePos())
case "selectWord":
if !m.cursor.AtBow() {
m.cursor.MovePrevBowEow()
}
if !m.selection.on {
m.selection.on = true
m.selection.SetStart(m.cursor.BytePos())
}
m.cursor.MoveNextBowEow()
m.selection.SetEnd(m.cursor.BytePos())
case "undo":
// TODO: Move to history.Undo()
if m.history.head == 0 {
return
}
m.selection.on = false
m.history.head--
undoActions := m.history.At(m.history.head)
for i := len(undoActions) - 1; i >= 0; i-- {
u := undoActions[i]
m.text = u.text
m.cursor.text = u.text
m.selection.text = u.text
m.parser.SetText(u.text)
switch u.kind {
case "insert":
m.cursor.Copy(u.afterCursor)
for range u.value {
m.cursor.Backspace()
}
case "paste":
m.cursor.Copy(u.afterCursor)
for range u.value {
m.cursor.Delete()
}
case "insertTab":
lineInfos := strings.Split(u.value, ",")
for _, li := range lineInfos {
if li == "" {
continue
}
lis := strings.Split(li, ":")
lstr := lis[0]
tab := lis[1]
l, err := strconv.Atoi(lstr)
if err != nil {
panic(err)
}
for _, r := range tab {
rr := m.text.Line(l).Remove(0, 1)
if rr != string(r) {
panic("removed and current is not matched")
}
}
}
m.cursor.Copy(u.beforeCursor)
case "backspace":
m.cursor.Copy(u.afterCursor)
m.cursor.Insert(u.value)
case "delete":
m.cursor.Copy(u.afterCursor)
m.cursor.Insert(u.value)
case "removeTab":
lineInfos := strings.Split(u.value, ",")
for _, li := range lineInfos {
if li == "" {
continue
}
lis := strings.Split(li, ":")
lstr := lis[0]
removed := lis[1]
l, err := strconv.Atoi(lstr)
if err != nil {
panic(err)
}
m.text.Line(l).Insert(removed, 0)
}
m.cursor.Copy(u.beforeCursor)
case "move":
m.cursor.Copy(u.beforeCursor)
default:
panic(fmt.Sprintln("what the..", u.kind, "history?"))
}
}
case "redo":
// TODO: Move to history.Redo()
if m.history.head == m.history.Len() {
return
}
m.selection.on = false
redoActions := m.history.At(m.history.head)
m.history.head++
for _, r := range redoActions {
m.text = r.text
m.cursor.text = r.text
m.selection.text = r.text
m.parser.SetText(r.text)
switch r.kind {
case "insert":
m.cursor.Copy(r.beforeCursor)
m.cursor.Insert(r.value)
case "paste":
m.cursor.Copy(r.beforeCursor)
m.cursor.Insert(r.value)
m.cursor.Copy(r.beforeCursor)
case "insertTab":
lineInfos := strings.Split(r.value, ",")
for _, li := range lineInfos {
if li == "" {
continue
}
lis := strings.Split(li, ":")
lstr := lis[0]
tab := lis[1]
l, err := strconv.Atoi(lstr)
if err != nil {
panic(err)
}
m.text.Line(l).Insert(tab, 0)
}
m.cursor.Copy(r.afterCursor)
case "backspace":
m.cursor.Copy(r.beforeCursor)
for range r.value {
m.cursor.Backspace()
}
case "delete":
m.cursor.Copy(r.beforeCursor)
for range r.value {
m.cursor.Delete()
}
case "removeTab":
lineInfos := strings.Split(r.value, ",")
for _, li := range lineInfos {
if li == "" {
continue
}
lis := strings.Split(li, ":")
lstr := lis[0]
removed := lis[1]
l, err := strconv.Atoi(lstr)
if err != nil {
panic(err)
}
for _, r := range removed {
rr := m.text.Line(l).Remove(0, 1)
if rr != string(r) {
panic("removed and current is not matched")
}
}
}
m.cursor.Copy(r.afterCursor)
case "move":
m.cursor.Copy(r.afterCursor)
default:
panic(fmt.Sprintln("what the..", r.kind, "history?"))
}
}
default:
panic(fmt.Sprintln("what the..", a.kind, "action?"))
}
}
// Status returns a status as string.
// The status will cleared when normal mode takes another event.
func (m *NormalMode) Status() string {
if m.status != "" {
return m.status
}
return fmt.Sprintf("%v:%v:%v", m.f, m.cursor.l+1, m.cursor.O()+1)
}
// Error returns an error of the last done action.
// If there was no error, it will return an empty string.
// The error will cleared when normal mode takes another event.
func (m *NormalMode) Error() string {
if !m.text.writable && m.err == "" {
return fmt.Sprintf("READ-ONLY: %v", m.Status())
}
return m.err
}