Upstreaming AppMenu.

chrome/android/java/src/org/chromium/chrome/browser/util/KeyNavigationUtil.java

Index: chrome/android/java/src/org/chromium/chrome/browser/util/KeyNavigationUtil.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/util/KeyNavigationUtil.java b/chrome/android/java/src/org/chromium/chrome/browser/util/KeyNavigationUtil.java
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index 0000000000000000000000000000000000000000..4a989d1069466eda3b0ff67645cf3e9183d45108
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+++ b/chrome/android/java/src/org/chromium/chrome/browser/util/KeyNavigationUtil.java
@@ -0,0 +1,86 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.chrome.browser.util;
+
+import android.view.KeyEvent;
+
+/**
+ * This is a helper class to handle navigation related checks for key events.
+ */
+public class KeyNavigationUtil {
+
+    /**
+     * This is a helper class with no instance.
+     */
+    private void KeyNavigationUtil() {
+    }
+
+    /**
+     * Checks whether the given event is any of DPAD down or NUMPAD down.
+     * @param event Event to be checked.
+     * @return Whether the event should be processed as a navigation down.
+     */
+    public static boolean isGoDown(KeyEvent event) {
+        return isActionDown(event) && (event.getKeyCode() == KeyEvent.KEYCODE_DPAD_DOWN
+                || (!event.isNumLockOn() && event.getKeyCode() == KeyEvent.KEYCODE_NUMPAD_2));
+    }
+
+    /**
+     * Checks whether the given event is any of DPAD up or NUMPAD up.
+     * @param event Event to be checked.
+     * @return Whether the event should be processed as a navigation up.
+     */
+    public static boolean isGoUp(KeyEvent event) {
+        return isActionDown(event) && (event.getKeyCode() == KeyEvent.KEYCODE_DPAD_UP
+                || (!event.isNumLockOn() && event.getKeyCode() == KeyEvent.KEYCODE_NUMPAD_8));
+    }
+
+    /**
+     * Checks whether the given event is any of DPAD right or NUMPAD right.
+     * @param event Event to be checked.
+     * @return Whether the event should be processed as a navigation right.
+     */
+    public static boolean isGoRight(KeyEvent event) {
+        return isActionDown(event) && (event.getKeyCode() == KeyEvent.KEYCODE_DPAD_RIGHT
+                || (!event.isNumLockOn() && event.getKeyCode() == KeyEvent.KEYCODE_NUMPAD_6));
+    }
+
+    /**
+     * Checks whether the given event is any of DPAD down, DPAD up, NUMPAD down or NUMPAD up.
+     * @param event Event to be checked.
+     * @return Whether the event should be processed as any of navigation up or navigation down.
+     */
+    public static boolean isGoUpOrDown(KeyEvent event) {
+        return isGoDown(event) || isGoUp(event);
+    }
+
+    /**
+     * Checks whether the given event is any of ENTER or NUMPAD ENTER.
+     * @param event Event to be checked.
+     * @return Whether the event should be processed as ENTER.
+     */
+    public static boolean isEnter(KeyEvent event) {
+        return isActionUp(event) && (event.getKeyCode() == KeyEvent.KEYCODE_ENTER
+                || event.getKeyCode() == KeyEvent.KEYCODE_NUMPAD_ENTER);
+    }
+
+    /**
+     * Checks whether the given event is an ACTION_DOWN event.
+     * @param event Event to be checked.
+     * @return Whether the event is an ACTION_DOWN event.
+     */
+    public static boolean isActionDown(KeyEvent event) {
+        return event.getAction() == KeyEvent.ACTION_DOWN;
+    }
+
+    /**
+     * Checks whether the given event is an ACTION_UP event.
+     * @param event Event to be checked.
+     * @return Whether the event is an ACTION_UP event.
+     */
+    public static boolean isActionUp(KeyEvent event) {
+        return event.getAction() == KeyEvent.ACTION_UP;
+    }
+}