Hilbish/readline/vimdelete.go

168 lines
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package readline
import (
"strings"
)
// vimDelete -
func (rl *Instance) viDelete(r rune) {
// We are allowed to type iterations after a delete ('d') command.
// in which case we don't exit the delete mode. The next thing typed
// will thus be dispatched back here (like "2d4 then w).
if !(r <= '9' && '0' <= r) {
defer func() { rl.modeViMode = VimKeys }()
}
switch r {
case 'b':
vii := rl.getViIterations()
rl.saveToRegisterTokenize(tokeniseLine, rl.viJumpB, vii)
for i := 1; i <= vii; i++ {
rl.viDeleteByAdjust(rl.viJumpB(tokeniseLine))
}
case 'B':
vii := rl.getViIterations()
rl.saveToRegisterTokenize(tokeniseSplitSpaces, rl.viJumpB, vii)
for i := 1; i <= vii; i++ {
rl.viDeleteByAdjust(rl.viJumpB(tokeniseSplitSpaces))
}
case 'd':
rl.saveBufToRegister(rl.line)
rl.clearLine()
rl.resetHelpers()
rl.getInfoText()
case 'e':
vii := rl.getViIterations()
rl.saveToRegisterTokenize(tokeniseLine, rl.viJumpE, vii)
for i := 1; i <= vii; i++ {
rl.viDeleteByAdjust(rl.viJumpE(tokeniseLine) + 1)
}
case 'E':
vii := rl.getViIterations()
rl.saveToRegisterTokenize(tokeniseSplitSpaces, rl.viJumpE, vii)
for i := 1; i <= vii; i++ {
rl.viDeleteByAdjust(rl.viJumpE(tokeniseSplitSpaces) + 1)
}
case 'w':
vii := rl.getViIterations()
rl.saveToRegisterTokenize(tokeniseLine, rl.viJumpW, vii)
for i := 1; i <= vii; i++ {
rl.viDeleteByAdjust(rl.viJumpW(tokeniseLine))
}
case 'W':
vii := rl.getViIterations()
rl.saveToRegisterTokenize(tokeniseSplitSpaces, rl.viJumpW, vii)
for i := 1; i <= vii; i++ {
rl.viDeleteByAdjust(rl.viJumpW(tokeniseSplitSpaces))
}
case '%':
rl.saveToRegister(rl.viJumpBracket())
rl.viDeleteByAdjust(rl.viJumpBracket())
case '$':
rl.saveBufToRegister(rl.line[rl.pos:])
rl.viDeleteByAdjust(len(rl.line) - rl.pos)
// Only go back if there is an input
if len(rl.line) > 0 {
rl.pos--
}
case '[':
rl.saveToRegister(rl.viJumpPreviousBrace())
rl.viDeleteByAdjust(rl.viJumpPreviousBrace())
case ']':
rl.saveToRegister(rl.viJumpNextBrace())
rl.viDeleteByAdjust(rl.viJumpNextBrace())
default:
if r <= '9' && '0' <= r {
rl.viIteration += string(r)
}
rl.viUndoSkipAppend = true
}
}
func (rl *Instance) viDeleteByAdjust(adjust int) {
var (
newLine []rune
backOne bool
)
// Avoid doing anything if input line is empty.
if len(rl.line) == 0 {
return
}
switch {
case adjust == 0:
rl.viUndoSkipAppend = true
return
case rl.pos+adjust == len(rl.line)-1:
// This case should normally happen only when we met ALL THOSE CONDITIONS:
// - We are currently in Insert Mode
// - Appending to the end of the line (the cusor pos is len(line) + 1)
// - We just deleted a single-lettered word from the input line.
//
// We must therefore ake a little adjustment (the -1), otherwise this
// single letter is kept in the input line while it should be deleted.
newLine = rl.line[:rl.pos-1]
if adjust != -1 {
backOne = true
}
case rl.pos+adjust == 0:
newLine = rl.line[rl.pos:]
case adjust < 0:
newLine = append(rl.line[:rl.pos+adjust], rl.line[rl.pos:]...)
default:
newLine = append(rl.line[:rl.pos], rl.line[rl.pos+adjust:]...)
}
rl.line = newLine
// rl.updateHelpers()
if adjust < 0 {
rl.moveCursorByAdjust(adjust)
}
if backOne {
rl.pos--
}
rl.updateHelpers()
}
func (rl *Instance) vimDeleteToken(r rune) bool {
tokens, _, _ := tokeniseSplitSpaces(rl.line, 0)
pos := int(r) - 48 // convert ASCII to integer
if pos > len(tokens) {
return false
}
s := string(rl.line)
newLine := strings.Replace(s, tokens[pos-1], "", -1)
if newLine == s {
return false
}
rl.line = []rune(newLine)
rl.updateHelpers()
if rl.pos > len(rl.line) {
rl.pos = len(rl.line) - 1
}
return true
}