100 lines
2.2 KiB
Go
100 lines
2.2 KiB
Go
package textmanip
|
|
|
|
import "unicode"
|
|
|
|
func WordToLeft (text []rune, cursor int) (length int) {
|
|
if cursor < 1 { return }
|
|
if cursor > len(text) { cursor = len(text) }
|
|
|
|
index := cursor - 1
|
|
for index >= 0 && unicode.IsSpace(text[index]) {
|
|
length ++
|
|
index --
|
|
}
|
|
for index >= 0 && !unicode.IsSpace(text[index]) {
|
|
length ++
|
|
index --
|
|
}
|
|
return
|
|
}
|
|
|
|
func WordToRight (text []rune, cursor int) (length int) {
|
|
if cursor < 0 { return }
|
|
if cursor > len(text) { cursor = len(text) }
|
|
|
|
index := cursor
|
|
for index < len(text) && unicode.IsSpace(text[index]) {
|
|
length ++
|
|
index ++
|
|
}
|
|
for index < len(text) && !unicode.IsSpace(text[index]) {
|
|
length ++
|
|
index ++
|
|
}
|
|
return
|
|
}
|
|
|
|
func Backspace (text []rune, cursor int, word bool) (result []rune, moved int) {
|
|
if cursor < 1 { return text, cursor }
|
|
if cursor > len(text) { cursor = len(text) }
|
|
|
|
moved = 1
|
|
if word {
|
|
moved = WordToLeft(text, cursor)
|
|
}
|
|
result = append(result, text[:cursor - moved]...)
|
|
result = append(result, text[cursor:]...)
|
|
moved = cursor - moved
|
|
return
|
|
}
|
|
|
|
func Delete (text []rune, cursor int, word bool) (result []rune, moved int) {
|
|
if cursor < 0 { return text, cursor }
|
|
if cursor > len(text) { cursor = len(text) }
|
|
|
|
moved = 1
|
|
if word {
|
|
moved = WordToRight(text, cursor)
|
|
}
|
|
result = append(result, text[:cursor]...)
|
|
result = append(result, text[cursor + moved:]...)
|
|
moved = cursor
|
|
return
|
|
}
|
|
|
|
func Type (text []rune, cursor int, character rune) (result []rune, moved int) {
|
|
if cursor < 0 { cursor = 0 }
|
|
if cursor > len(text) { cursor = len(text) }
|
|
result = append(result, text[:cursor]...)
|
|
result = append(result, character)
|
|
if cursor < len(text) {
|
|
result = append(result, text[cursor:]...)
|
|
}
|
|
moved = cursor + 1
|
|
return
|
|
}
|
|
|
|
func MoveLeft (text []rune, cursor int, word bool) (moved int) {
|
|
if cursor < 1 { return cursor }
|
|
if cursor > len(text) { cursor = len(text) }
|
|
|
|
moved = 1
|
|
if word {
|
|
moved = WordToLeft(text, cursor)
|
|
}
|
|
moved = cursor - moved
|
|
return
|
|
}
|
|
|
|
func MoveRight (text []rune, cursor int, word bool) (moved int) {
|
|
if cursor < 0 { return cursor }
|
|
if cursor > len(text) { cursor = len(text) }
|
|
|
|
moved = 1
|
|
if word {
|
|
moved = WordToRight(text, cursor)
|
|
}
|
|
moved = cursor + moved
|
|
return
|
|
}
|