Merge "Use the line height to adjust the Y coordinate for touch through."

        private boolean mIsInActionMode;

        // The timestamp for the last up event, which is used for double tap detection.

        private long mLastUpTime;

        // The text height of the font of the text view, which is used to calculate the Y coordinate

        // of the touch through events.

        private float mTextHeight;

        // The delta height applied to the insertion handle view.

        private final int mDeltaHeight;

                    if (ev.getEventTime() - mLastUpTime < ViewConfiguration.getDoubleTapTimeout()) {

                        stopTextActionMode();  // Avoid crash when double tap and drag backwards.

                    }

                    final Paint.FontMetrics fontMetrics = mTextView.getPaint().getFontMetrics();

                    mTextHeight = fontMetrics.descent - fontMetrics.ascent;

                    mTouchState.setIsOnHandle(true);

                    break;

                case MotionEvent.ACTION_UP:

        }

        private MotionEvent transformEventForTouchThrough(MotionEvent ev) {

            final Layout layout = mTextView.getLayout();

            final int line = layout.getLineForOffset(getCurrentCursorOffset());

            final int textHeight =

                    layout.getLineBottomWithoutSpacing(line) - layout.getLineTop(line);

            // Transforms the touch events to screen coordinates.

            // And also shift up to make the hit point is on the text.

            // Note:

            //  - The revised Y should be at the top of the text.

            Matrix m = new Matrix();

            m.setTranslate(ev.getRawX() - ev.getX() + (getMeasuredWidth() >> 1) - mTouchDownX,

                    ev.getRawY() - ev.getY() - mTouchDownY - mTextHeight);

                    ev.getRawY() - ev.getY() - (textHeight >> 1) - mTouchDownY);

            ev.transform(m);

            // Transforms the touch events to text view coordinates.

            mTextView.toLocalMotionEvent(ev);