1 files changed, 85 insertions, 0 deletions
diff --git a/java/src/com/android/inputmethod/keyboard/internal/ModifierKeyState.java b/java/src/com/android/inputmethod/keyboard/internal/ModifierKeyState.java
new file mode 100644
index 000000000..dae73c4e4
--- /dev/null
+++ b/java/src/com/android/inputmethod/keyboard/internal/ModifierKeyState.java
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * 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.keyboard.internal;
+
+import android.util.Log;
+
+import com.android.inputmethod.keyboard.KeyboardSwitcher;
+
+public class ModifierKeyState {
+    protected static final String TAG = "ModifierKeyState";
+    protected static final boolean DEBUG = KeyboardSwitcher.DEBUG_STATE;
+
+    protected static final int RELEASING = 0;
+    protected static final int PRESSING = 1;
+    protected static final int MOMENTARY = 2;
+
+    protected final String mName;
+    protected int mState = RELEASING;
+
+    public ModifierKeyState(String name) {
+        mName = name;
+    }
+
+    public void onPress() {
+        final int oldState = mState;
+        mState = PRESSING;
+        if (DEBUG)
+            Log.d(TAG, mName + ".onPress: " + toString(oldState) + " > " + this);
+    }
+
+    public void onRelease() {
+        final int oldState = mState;
+        mState = RELEASING;
+        if (DEBUG)
+            Log.d(TAG, mName + ".onRelease: " + toString(oldState) + " > " + this);
+    }
+
+    public void onOtherKeyPressed() {
+        final int oldState = mState;
+        if (oldState == PRESSING)
+            mState = MOMENTARY;
+        if (DEBUG)
+            Log.d(TAG, mName + ".onOtherKeyPressed: " + toString(oldState) + " > " + this);
+    }
+
+    public boolean isPressing() {
+        return mState == PRESSING;
+    }
+
+    public boolean isReleasing() {
+        return mState == RELEASING;
+    }
+
+    public boolean isMomentary() {
+        return mState == MOMENTARY;
+    }
+
+    @Override
+    public String toString() {
+        return toString(mState);
+    }
+
+    protected String toString(int state) {
+        switch (state) {
+        case RELEASING: return "RELEASING";
+        case PRESSING: return "PRESSING";
+        case MOMENTARY: return "MOMENTARY";
+        default: return "UNKNOWN";
+        }
+    }
+}