Method cursorBackwardWord

core/textfield.go:676–727

cursorBackwardWord moves the cursor backward by words

(steps int)

// cursorBackwardWord moves the cursor backward by words
func (tf *TextField) cursorBackwardWord(steps int) {
	for i := 0; i < steps; i++ {
		sz := len(tf.editText)
		if sz > 0 && tf.cursorPos > 0 {
			ch := min(tf.cursorPos, sz-1)
			var done = false
			for ch < sz && !done { // if on a wb, go past
				r1 := tf.editText[ch]
				r2 := rune(-1)
				if ch > 0 {
					r2 = tf.editText[ch-1]
				}
				if IsWordBreak(r1, r2) {
					ch--
					if ch == -1 {
						done = true
					}
				} else {
					done = true
				}
			}
			done = false
			for ch < sz && ch >= 0 && !done {
				r1 := tf.editText[ch]
				r2 := rune(-1)
				if ch > 0 {
					r2 = tf.editText[ch-1]
				}
				if !IsWordBreak(r1, r2) {
					ch--
				} else {
					done = true
				}
			}
			tf.cursorPos = ch
		} else {
			tf.cursorPos = 0
		}
	}
	if tf.cursorPos < 0 {
		tf.cursorPos = 0
	}
	if tf.cursorPos <= tf.startPos {
		dec := min(tf.startPos, 8)
		tf.startPos -= dec
	}
	tf.cursorLine, _, _ = tf.renderAll.RuneSpanPos(tf.cursorPos)
	if tf.selectMode {
		tf.selectRegionUpdate(tf.cursorPos)
	}
	tf.NeedsRender()
}

// cursorDown moves the cursor down
func (tf *TextField) cursorDown(steps int) {