Merge "Fix potential exception while pressing volume up and volume down" into... (8605801a) · Commits · e / os / android_frameworks_base

services/core/java/com/android/server/policy/KeyCombinationManager.java

+31 −12

Original line number	Diff line number	Diff line
		@@ -17,11 +17,13 @@ package com.android.server.policy;

		import static android.view.KeyEvent.KEYCODE_POWER;

		import android.os.Handler;
		import android.os.SystemClock;
		import android.util.Log;
		import android.util.SparseLongArray;
		import android.view.KeyEvent;

		import com.android.internal.annotations.GuardedBy;
		import com.android.internal.util.ToBooleanFunction;

		import java.io.PrintWriter;
		@@ -35,13 +37,18 @@ public class KeyCombinationManager {
		private static final String TAG = "KeyCombinationManager";

		// Store the received down time of keycode.
		@GuardedBy("mLock")
		private final SparseLongArray mDownTimes = new SparseLongArray(2);
		private final ArrayList<TwoKeysCombinationRule> mRules = new ArrayList();

		// Selected rules according to current key down.
		private final Object mLock = new Object();
		@GuardedBy("mLock")
		private final ArrayList<TwoKeysCombinationRule> mActiveRules = new ArrayList();
		// The rule has been triggered by current keys.
		@GuardedBy("mLock")
		private TwoKeysCombinationRule mTriggeredRule;
		private final Handler mHandler = new Handler();

		// Keys in a key combination must be pressed within this interval of each other.
		private static final long COMBINE_KEY_DELAY_MILLIS = 150;
		@@ -109,6 +116,12 @@ public class KeyCombinationManager {
		* Return true if any active rule could be triggered by the key event, otherwise false.
		*/
		boolean interceptKey(KeyEvent event, boolean interactive) {
		synchronized (mLock) {
		return interceptKeyLocked(event, interactive);
		}
		}

		private boolean interceptKeyLocked(KeyEvent event, boolean interactive) {
		final boolean down = event.getAction() == KeyEvent.ACTION_DOWN;
		final int keyCode = event.getKeyCode();
		final int count = mActiveRules.size();
		@@ -154,7 +167,7 @@ public class KeyCombinationManager {
		return false;
		}
		Log.v(TAG, "Performing combination rule : " + rule);
		rule.execute();
		mHandler.post(rule::execute);
		mTriggeredRule = rule;
		return true;
		});
		@@ -169,7 +182,7 @@ public class KeyCombinationManager {
		for (int index = count - 1; index >= 0; index--) {
		final TwoKeysCombinationRule rule = mActiveRules.get(index);
		if (rule.shouldInterceptKey(keyCode)) {
		rule.cancel();
		mHandler.post(rule::cancel);
		mActiveRules.remove(index);
		}
		}
		@@ -181,32 +194,38 @@ public class KeyCombinationManager {
		* Return the interceptTimeout to tell InputDispatcher when is ready to deliver to window.
		*/
		long getKeyInterceptTimeout(int keyCode) {
		synchronized (mLock) {
		if (forAllActiveRules((rule) -> rule.shouldInterceptKey(keyCode))) {
		return mDownTimes.get(keyCode) + COMBINE_KEY_DELAY_MILLIS;
		}
		return 0;
		}
		}

		/**
		* True if the key event had been handled.
		*/
		boolean isKeyConsumed(KeyEvent event) {
		synchronized (mLock) {
		if ((event.getFlags() & KeyEvent.FLAG_FALLBACK) != 0) {
		return false;
		}
		return mTriggeredRule != null && mTriggeredRule.shouldInterceptKey(event.getKeyCode());
		}
		}

		/**
		* True if power key is the candidate.
		*/
		boolean isPowerKeyIntercepted() {
		synchronized (mLock) {
		if (forAllActiveRules((rule) -> rule.shouldInterceptKey(KEYCODE_POWER))) {
		// return false if only if power key pressed.
		return mDownTimes.size() > 1 \|\| mDownTimes.get(KEYCODE_POWER) == 0;
		}
		return false;
		}
		}

		/**
		* Traverse each item of rules.