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Commit 6aced6ea authored by Nergi Rahardi's avatar Nergi Rahardi
Browse files

Add util method to check if MotionEvent is synthesized touchpad gesture 

This check is being done in many places:
- WMShell MotionEvent extensions
- Settings DisplayTopologyPreferenceController
- MouseToTouchProcessor
- A11y

More might be added in the future. Ideally having this unified under
MotionEvent itself might be better, similar to isTouchEvent() or
isStylusPointer() check. If there's a new classification or new
condition in the future, it can be added here and all usages are updated

Bug: 436380669
Test: Manual test with touchpad
Flag: EXEMPT adding hidden util method
Change-Id: I2f8384ffa807a9516ba9dedfdee3e0d31caddda0
parent 8ab7c2db

core/java/android/view/MotionEvent.java

+23 −0
Original line number Diff line number Diff line
@@ -2530,6 +2530,29 @@ public final class MotionEvent extends InputEvent implements Parcelable { 
                || getActionMasked() == ACTION_HOVER_MOVE;

    }



    /**

     * Returns {@code true} if this motion event is a synthesized touchpad gesture.

     *

     * <p>Before using this method, consider whether you truly need to apply special treatment to

     * all synthesized touchpad gestures (including ones which may be added in future), or whether a

     * check for a specific classification (e.g. {@link #CLASSIFICATION_TWO_FINGER_SWIPE}) would

     * suffice instead.

     *

     * @see #CLASSIFICATION_TWO_FINGER_SWIPE

     * @see #CLASSIFICATION_PINCH

     * @see #CLASSIFICATION_MULTI_FINGER_SWIPE

     *

     * @hide

     */

    public boolean isSynthesizedTouchpadGesture() {

        int classification = getClassification();

        return isFromSource(InputDevice.SOURCE_MOUSE) && getToolType(0)

                == MotionEvent.TOOL_TYPE_FINGER && (

                classification == MotionEvent.CLASSIFICATION_TWO_FINGER_SWIPE

                        || classification == MotionEvent.CLASSIFICATION_PINCH

                        || classification == MotionEvent.CLASSIFICATION_MULTI_FINGER_SWIPE);

    }



    /**

     * Gets the motion event flags.

     *