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