1 files changed, 131 insertions, 0 deletions
diff --git a/java/src/com/android/inputmethod/keyboard/internal/AlphabetShiftState.java b/java/src/com/android/inputmethod/keyboard/internal/AlphabetShiftState.java
new file mode 100644
index 000000000..5712df1fc
--- /dev/null
+++ b/java/src/com/android/inputmethod/keyboard/internal/AlphabetShiftState.java
@@ -0,0 +1,131 @@
+/*
+ * 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;
+
+public class AlphabetShiftState {
+    private static final String TAG = AlphabetShiftState.class.getSimpleName();
+    private static final boolean DEBUG = false;
+
+    private static final int UNSHIFTED = 0;
+    private static final int MANUAL_SHIFTED = 1;
+    private static final int MANUAL_SHIFTED_FROM_AUTO = 2;
+    private static final int AUTOMATIC_SHIFTED = 3;
+    private static final int SHIFT_LOCKED = 4;
+    private static final int SHIFT_LOCK_SHIFTED = 5;
+
+    private int mState = UNSHIFTED;
+
+    public void setShifted(boolean newShiftState) {
+        final int oldState = mState;
+        if (newShiftState) {
+            switch (oldState) {
+            case UNSHIFTED:
+                mState = MANUAL_SHIFTED;
+                break;
+            case AUTOMATIC_SHIFTED:
+                mState = MANUAL_SHIFTED_FROM_AUTO;
+                break;
+            case SHIFT_LOCKED:
+                mState = SHIFT_LOCK_SHIFTED;
+                break;
+            }
+        } else {
+            switch (oldState) {
+            case MANUAL_SHIFTED:
+            case MANUAL_SHIFTED_FROM_AUTO:
+            case AUTOMATIC_SHIFTED:
+                mState = UNSHIFTED;
+                break;
+            case SHIFT_LOCK_SHIFTED:
+                mState = SHIFT_LOCKED;
+                break;
+            }
+        }
+        if (DEBUG)
+            Log.d(TAG, "setShifted(" + newShiftState + "): " + toString(oldState) + " > " + this);
+    }
+
+    public void setShiftLocked(boolean newShiftLockState) {
+        final int oldState = mState;
+        if (newShiftLockState) {
+            switch (oldState) {
+            case UNSHIFTED:
+            case MANUAL_SHIFTED:
+            case MANUAL_SHIFTED_FROM_AUTO:
+            case AUTOMATIC_SHIFTED:
+                mState = SHIFT_LOCKED;
+                break;
+            }
+        } else {
+            mState = UNSHIFTED;
+        }
+        if (DEBUG)
+            Log.d(TAG, "setShiftLocked(" + newShiftLockState + "): " + toString(oldState)
+                    + " > " + this);
+    }
+
+    public void setAutomaticShifted() {
+        final int oldState = mState;
+        mState = AUTOMATIC_SHIFTED;
+        if (DEBUG)
+            Log.d(TAG, "setAutomaticShifted: " + toString(oldState) + " > " + this);
+    }
+
+    public boolean isShiftedOrShiftLocked() {
+        return mState != UNSHIFTED;
+    }
+
+    public boolean isShiftLocked() {
+        return mState == SHIFT_LOCKED || mState == SHIFT_LOCK_SHIFTED;
+    }
+
+    public boolean isShiftLockShifted() {
+        return mState == SHIFT_LOCK_SHIFTED;
+    }
+
+    public boolean isAutomaticShifted() {
+        return mState == AUTOMATIC_SHIFTED;
+    }
+
+    public boolean isManualShifted() {
+        return mState == MANUAL_SHIFTED || mState == MANUAL_SHIFTED_FROM_AUTO
+                || mState == SHIFT_LOCK_SHIFTED;
+    }
+
+    public boolean isManualShiftedFromAutomaticShifted() {
+        return mState == MANUAL_SHIFTED_FROM_AUTO;
+    }
+
+    @Override
+    public String toString() {
+        return toString(mState);
+    }
+
+    private static String toString(int state) {
+        switch (state) {
+        case UNSHIFTED: return "UNSHIFTED";
+        case MANUAL_SHIFTED: return "MANUAL_SHIFTED";
+        case MANUAL_SHIFTED_FROM_AUTO: return "MANUAL_SHIFTED_FROM_AUTO";
+        case AUTOMATIC_SHIFTED: return "AUTOMATIC_SHIFTED";
+        case SHIFT_LOCKED: return "SHIFT_LOCKED";
+        case SHIFT_LOCK_SHIFTED: return "SHIFT_LOCK_SHIFTED";
+        default: return "UNKNOWN";
+        }
+    }
+}