FairyGUI.InputTextField.AdjustCaret C# (CSharp) Method

        void AdjustCaret(TextField.CharPosition cp)
        {
            _caretPosition = cp.caretIndex;

            Vector2 pos = GetCharLocation(cp);
            TextField.LineInfo line = textField.lines[cp.lineIndex];
            pos.y = line.y + textField.y;
            Vector2 newPos = pos;

            if (newPos.x < textField.textFormat.size)
                newPos.x += Math.Min(50, (int)(_contentRect.width / 2));
            else if (newPos.x > _contentRect.width - GUTTER_X - textField.textFormat.size)
                newPos.x -= Math.Min(50, (int)(_contentRect.width / 2));

            if (newPos.x < GUTTER_X)
                newPos.x = GUTTER_X;
            else if (newPos.x > _contentRect.width - GUTTER_X)
                newPos.x = Math.Max(GUTTER_X, _contentRect.width - GUTTER_X);

            if (newPos.y < GUTTER_Y)
                newPos.y = GUTTER_Y;
            else if (newPos.y + line.height >= _contentRect.height - GUTTER_Y)
                newPos.y = Math.Max(GUTTER_Y, _contentRect.height - line.height - GUTTER_Y);

            pos += MoveContent(newPos - pos);

            if (_editing)
            {
                if (line.height > 0) //将光标居中
                    pos.y += (int)(line.height - textField.textFormat.size) / 2;

                _caret.SetPosition(pos.x, pos.y, 0);

                Vector2 cursorPos = _caret.LocalToGlobal(new Vector2(0, _caret.height));
                Input.compositionCursorPos = cursorPos;

                _nextBlink = Time.time + 0.5f;
                _caret.graphics.enabled = true;

                if (_selectionStart != null)
                    UpdateSelection(cp);
            }
        }