Queuing PointerTracker to support n-key roll-over and shift modifier.

Bug: 2910379
Change-Id: I5cfae33e72a406585137842a2260310813cee07f

1 files changed, 42 insertions, 0 deletions

diff --git a/java/src/com/android/inputmethod/latin/ModifierKeyState.java b/java/src/com/android/inputmethod/latin/ModifierKeyState.java
new file mode 100644
index 000000000..097e87abe
--- /dev/null
+++ b/java/src/com/android/inputmethod/latin/ModifierKeyState.java
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2010 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package com.android.inputmethod.latin;
+
+class ModifierKeyState {
+    private static final int RELEASING = 0;
+    private static final int PRESSING = 1;
+    private static final int MOMENTARY = 2;
+
+    private int mState = RELEASING;
+
+    public void onPress() {
+        mState = PRESSING;
+    }
+
+    public void onRelease() {
+        mState = RELEASING;
+    }
+
+    public void onOtherKeyPressed() {
+        if (mState == PRESSING)
+            mState = MOMENTARY;
+    }
+
+    public boolean isMomentary() {
+        return mState == MOMENTARY;
+    }
+}