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Commit 33949862 authored by Siarhei Vishniakou's avatar Siarhei Vishniakou
Browse files

Accelerate long press in View.java 

If a force press is detected, the MotionEvent will have a classification
of CLASSIFICATION_DEEP_PRESS. When this type is detected, dispatch the long
press event immediately.

Bug: 62940136
Test: "force" press on home screen and see the logcat message about
accelerating the long press action, see the menu appear sooner than the
typical timeout for long press.

Change-Id: Ifcd953356f42248c1d3c6674877b84b3aaf01299
parent bacad701

core/java/android/view/View.java

+53 −1
Original line number Diff line number Diff line
@@ -3984,6 +3984,15 @@ public class View implements Drawable.Callback, KeyEvent.Callback, 
     */

    public static final int SCROLL_AXIS_VERTICAL = 1 << 1;













    /**













     * If a MotionEvent has CLASSIFICATION_AMBIGUOUS_GESTURE set, then certain the default













     * long press action will be inhibited. However, to account for the possibility of incorrect













     * classification, the default long press timeout will instead be increased for some situations













     * by the following factor.













     * Likewise, the touch slop for allowing long press will be increased when gesture is uncertain.













     */













    private static final int AMBIGUOUS_GESTURE_MULTIPLIER = 2;



























    /**















     * Controls the over-scroll mode for this view.















     * See {@link #overScrollBy(int, int, int, int, int, int, int, int, boolean)},










@@ -14780,8 +14789,27 @@ public class View implements Drawable.Callback, KeyEvent.Callback,













                        drawableHotspotChanged(x, y);















                    }



























                    final int motionClassification = event.getClassification();













                    final boolean ambiguousGesture =













                            motionClassification == MotionEvent.CLASSIFICATION_AMBIGUOUS_GESTURE;













                    int touchSlop = mTouchSlop;













                    if (ambiguousGesture && hasPendingLongPressCallback()) {













                        if (!pointInView(x, y, touchSlop)) {













                            // The default action here is to cancel long press. But instead, we













                            // just extend the timeout here, in case the classification













                            // stays ambiguous.













                            removeLongPressCallback();













                            long delay = ViewConfiguration.getLongPressTimeout()













                                    * AMBIGUOUS_GESTURE_MULTIPLIER;













                            // Subtract the time already spent













                            delay -= event.getEventTime() - event.getDownTime();













                            checkForLongClick(delay, x, y);













                        }













                        touchSlop *= AMBIGUOUS_GESTURE_MULTIPLIER;













                    }



























                    // Be lenient about moving outside of buttons













                    if (!pointInView(x, y, mTouchSlop)) {













                    if (!pointInView(x, y, touchSlop)) {















                        // Outside button















                        // Remove any future long press/tap checks















                        removeTapCallback();









@@ -14791,6 +14819,15 @@ public class View implements Drawable.Callback, KeyEvent.Callback,













                        }















                        mPrivateFlags3 &= ~PFLAG3_FINGER_DOWN;















                    }

























                    final boolean deepPress =













                            motionClassification == MotionEvent.CLASSIFICATION_DEEP_PRESS;













                    if (deepPress && hasPendingLongPressCallback()) {













                        // process the long click action immediately













                        removeLongPressCallback();













                        checkForLongClick(0 /* send immediately */, x, y);













                    }



























                    break;















            }
























@@ -14824,6 +14861,21 @@ public class View implements Drawable.Callback, KeyEvent.Callback,













        }















    }



























    /**













     * Return true if the long press callback is scheduled to run sometime in the future.













     * Return false if there is no scheduled long press callback at the moment.













     */













    private boolean hasPendingLongPressCallback() {













        if (mPendingCheckForLongPress == null) {













            return false;













        }













        final AttachInfo attachInfo = mAttachInfo;













        if (attachInfo == null) {













            return false;













        }













        return attachInfo.mHandler.hasCallbacks(mPendingCheckForLongPress);













    }



























   /**















     * Remove the pending click action















     */