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Commit 9ea77fc8 authored by Jeff Brown's avatar Jeff Brown
Browse files

Avoid calling into JNI if not needed. 

Short-circuit a few MotionEvent JNI calls in simple cases.

Change-Id: I6c97c06b5a5fd203a423dc88f428637b9dec71ae
parent e67ca420

core/java/android/view/MotionEvent.java

+15 −5
Original line number Diff line number Diff line
@@ -1656,13 +1656,21 @@ public final class MotionEvent extends InputEvent implements Parcelable { 
    }



    /**

     * Scales down the coordination of this event by the given scale.

     * Applies a scale factor to all points within this event.

     *

     * This method is used to adjust touch events to simulate different density

     * displays for compatibility mode.  The values returned by {@link #getRawX()},

     * {@link #getRawY()}, {@link #getXPrecision()} and {@link #getYPrecision()}

     * are also affected by the scale factor.

     *

     * @param scale The scale factor to apply.

     * @hide

     */

    public final void scale(float scale) {

        if (scale != 1.0f) {

            nativeScale(mNativePtr, scale);

        }

    }



    /** {@inheritDoc} */

    @Override
@@ -2631,8 +2639,10 @@ public final class MotionEvent extends InputEvent implements Parcelable { 
     * @param deltaY Amount to add to the current Y coordinate of the event.

     */

    public final void offsetLocation(float deltaX, float deltaY) {

        if (deltaX != 0.0f || deltaY != 0.0f) {

            nativeOffsetLocation(mNativePtr, deltaX, deltaY);

        }

    }



    /**

     * Set this event's location.  Applies {@link #offsetLocation} with a
@@ -2644,7 +2654,7 @@ public final class MotionEvent extends InputEvent implements Parcelable { 
    public final void setLocation(float x, float y) {

        float oldX = getX();

        float oldY = getY();

        nativeOffsetLocation(mNativePtr, x - oldX, y - oldY);

        offsetLocation(x - oldX, y - oldY);

    }

    

    /**