/
isearch.go
124 lines (121 loc) · 2.48 KB
/
isearch.go
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package readline
import (
"context"
"fmt"
"io"
"strings"
"unicode"
"unicode/utf8"
)
func keyFuncIncSearch(ctx context.Context, this *Buffer) Result {
var searchBuf strings.Builder
foundStr := ""
searchStr := ""
lastFoundPos := this.History.Len() - 1
this.backspace(this.GetWidthBetween(this.ViewStart, this.Cursor))
update := func() {
for i := this.History.Len() - 1; ; i-- {
if i < 0 {
foundStr = ""
break
}
line := this.History.At(i)
if strings.Contains(line, searchStr) {
foundStr = line
lastFoundPos = i
break
}
}
}
for {
drawStr := fmt.Sprintf("(i-search)[%s]:%s", searchStr, foundStr)
drawWidth := width_t(0)
for _, ch := range drawStr {
w1 := GetCharWidth(ch)
if drawWidth+w1 >= this.ViewWidth() {
break
}
this.putRune(ch)
drawWidth += w1
}
this.Eraseline()
io.WriteString(this.Out, ansiCursorOn)
this.Out.Flush()
key, err := this.GetKey()
if err != nil {
println(err.Error())
return CONTINUE
}
io.WriteString(this.Out, ansiCursorOff)
this.backspace(drawWidth)
switch key {
case "\b":
searchBuf.Reset()
// chop last char
var lastchar rune
for i, c := range searchStr {
if i > 0 {
searchBuf.WriteRune(lastchar)
}
lastchar = c
}
searchStr = searchBuf.String()
update()
case "\r":
this.ViewStart = 0
u := &undo_t{
pos: 0,
text: string(this.Buffer),
}
this.undoes = append(this.undoes, u)
this.Buffer = this.Buffer[:0]
this.Cursor = 0
this.ReplaceAndRepaint(0, foundStr)
return CONTINUE
case "\x03", "\x07", "\x1B":
all, _, right := this.view3()
this.puts(all)
this.Eraseline()
this.backspace(right.Width())
return CONTINUE
case "\x12":
for i := lastFoundPos - 1; ; i-- {
if i < 0 {
i = this.History.Len() - 1
}
if i == lastFoundPos {
break
}
line := this.History.At(i)
if strings.Contains(line, searchStr) && foundStr != line {
foundStr = line
lastFoundPos = i
break
}
}
case "\x13":
for i := lastFoundPos + 1; ; i++ {
if i >= this.History.Len() {
break
}
if i == lastFoundPos {
break
}
line := this.History.At(i)
if strings.Contains(line, searchStr) && foundStr != line {
foundStr = line
lastFoundPos = i
break
}
}
default:
charcode, _ := utf8.DecodeRuneInString(key)
if unicode.IsControl(charcode) {
break
}
searchBuf.WriteRune(charcode)
searchStr = searchBuf.String()
update()
}
}
}