Add InputMethodServiceCompatWrapper for moving the callback from LatinIME.

Change-Id: If6b0180c63738e5e78a20fe5b938ef50d62865d6

1 files changed, 65 insertions, 0 deletions

diff --git a/java/src/com/android/inputmethod/compat/InputMethodServiceCompatWrapper.java b/java/src/com/android/inputmethod/compat/InputMethodServiceCompatWrapper.java
new file mode 100644
index 000000000..72f3ca0d0
--- /dev/null
+++ b/java/src/com/android/inputmethod/compat/InputMethodServiceCompatWrapper.java
@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2011 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.compat;
+
+import com.android.inputmethod.latin.SubtypeSwitcher;
+
+import android.inputmethodservice.InputMethodService;
+import android.view.inputmethod.InputMethodSubtype;
+
+public class InputMethodServiceCompatWrapper extends InputMethodService {
+    // CAN_HANDLE_ON_CURRENT_INPUT_METHOD_SUBTYPE_CHANGED needs to be false if the API level is 10
+    // or previous. Note that InputMethodSubtype was added in the API level 11.
+    // For the API level 11 or later, LatinIME should override onCurrentInputMethodSubtypeChanged().
+    // For the API level 10 or previous, we handle the "subtype changed" events by ourselves
+    // without having support from framework -- onCurrentInputMethodSubtypeChanged().
+    private static final boolean CAN_HANDLE_ON_CURRENT_INPUT_METHOD_SUBTYPE_CHANGED = true;
+
+    private InputMethodManagerCompatWrapper mImm;
+
+    @Override
+    public void onCreate() {
+        super.onCreate();
+        mImm = InputMethodManagerCompatWrapper.getInstance(this);
+    }
+
+    // When the API level is 10 or previous, notifyOnCurrentInputMethodSubtypeChanged should
+    // handle the event the current subtype was changed. LatinIME calls
+    // notifyOnCurrentInputMethodSubtypeChanged every time LatinIME
+    // changes the current subtype.
+    // This call is required to let LatinIME itself know a subtype changed
+    // event when the API level is 10 or previous.
+    @SuppressWarnings("unused")
+    public void notifyOnCurrentInputMethodSubtypeChanged(InputMethodSubtypeCompatWrapper subtype) {
+        // Do nothing when the API level is 11 or later
+        if (CAN_HANDLE_ON_CURRENT_INPUT_METHOD_SUBTYPE_CHANGED) return;
+        if (subtype == null) {
+            subtype = mImm.getCurrentInputMethodSubtype();
+        }
+        if (subtype != null) {
+            SubtypeSwitcher.getInstance().updateSubtype(subtype);
+        }
+    }
+
+    @Override
+    public void onCurrentInputMethodSubtypeChanged(InputMethodSubtype subtype) {
+        // Do nothing when the API level is 10 or previous
+        if (!CAN_HANDLE_ON_CURRENT_INPUT_METHOD_SUBTYPE_CHANGED) return;
+        SubtypeSwitcher.getInstance().updateSubtype(
+                new InputMethodSubtypeCompatWrapper(subtype));
+    }
+}