1 files changed, 163 insertions, 0 deletions
diff --git a/java/src/com/android/inputmethod/latin/ImfUtils.java b/java/src/com/android/inputmethod/latin/ImfUtils.java
new file mode 100644
index 000000000..bd7d89fe7
--- /dev/null
+++ b/java/src/com/android/inputmethod/latin/ImfUtils.java
@@ -0,0 +1,163 @@
+/*
+ * Copyright (C) 2012 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.latin;
+
+import android.content.Context;
+import android.view.inputmethod.InputMethodInfo;
+import android.view.inputmethod.InputMethodManager;
+import android.view.inputmethod.InputMethodSubtype;
+
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * Utility class for Input Method Framework
+ */
+public class ImfUtils {
+    private ImfUtils() {
+        // This utility class is not publicly instantiable.
+    }
+
+    private static InputMethodManager sInputMethodManager;
+
+    public static InputMethodManager getInputMethodManager(Context context) {
+        if (sInputMethodManager == null) {
+            sInputMethodManager = (InputMethodManager)context.getSystemService(
+                    Context.INPUT_METHOD_SERVICE);
+        }
+        return sInputMethodManager;
+    }
+
+    private static InputMethodInfo sInputMethodInfoOfThisIme;
+
+    public static InputMethodInfo getInputMethodInfoOfThisIme(Context context) {
+        if (sInputMethodInfoOfThisIme == null) {
+            final InputMethodManager imm = getInputMethodManager(context);
+            final String packageName = context.getPackageName();
+            for (final InputMethodInfo imi : imm.getInputMethodList()) {
+                if (imi.getPackageName().equals(packageName))
+                    return imi;
+            }
+            throw new RuntimeException("Can not find input method id for " + packageName);
+        }
+        return sInputMethodInfoOfThisIme;
+    }
+
+    public static String getInputMethodIdOfThisIme(Context context) {
+        return getInputMethodInfoOfThisIme(context).getId();
+    }
+
+    public static boolean checkIfSubtypeBelongsToThisIme(Context context, InputMethodSubtype ims) {
+        final InputMethodInfo myImi = getInputMethodInfoOfThisIme(context);
+        final InputMethodManager imm = getInputMethodManager(context);
+        final List<InputMethodSubtype> subtypes = imm.getEnabledInputMethodSubtypeList(myImi, true);
+        for (final InputMethodSubtype subtype : subtypes) {
+            if (subtype.equals(ims)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    public static boolean hasMultipleEnabledIMEsOrSubtypes(Context context,
+            final boolean shouldIncludeAuxiliarySubtypes) {
+        final InputMethodManager imm = getInputMethodManager(context);
+        final List<InputMethodInfo> enabledImis = imm.getEnabledInputMethodList();
+        return hasMultipleEnabledSubtypes(context, shouldIncludeAuxiliarySubtypes, enabledImis);
+    }
+
+    public static boolean hasMultipleEnabledSubtypesInThisIme(Context context,
+            final boolean shouldIncludeAuxiliarySubtypes) {
+        final InputMethodInfo myImi = getInputMethodInfoOfThisIme(context);
+        final List<InputMethodInfo> imiList = Collections.singletonList(myImi);
+        return hasMultipleEnabledSubtypes(context, shouldIncludeAuxiliarySubtypes, imiList);
+    }
+
+    private static boolean hasMultipleEnabledSubtypes(Context context,
+            final boolean shouldIncludeAuxiliarySubtypes, List<InputMethodInfo> imiList) {
+        final InputMethodManager imm = getInputMethodManager(context);
+
+        // Number of the filtered IMEs
+        int filteredImisCount = 0;
+
+        for (InputMethodInfo imi : imiList) {
+            // We can return true immediately after we find two or more filtered IMEs.
+            if (filteredImisCount > 1) return true;
+            final List<InputMethodSubtype> subtypes =
+                    imm.getEnabledInputMethodSubtypeList(imi, true);
+            // IMEs that have no subtypes should be counted.
+            if (subtypes.isEmpty()) {
+                ++filteredImisCount;
+                continue;
+            }
+
+            int auxCount = 0;
+            for (InputMethodSubtype subtype : subtypes) {
+                if (subtype.isAuxiliary()) {
+                    ++auxCount;
+                }
+            }
+            final int nonAuxCount = subtypes.size() - auxCount;
+
+            // IMEs that have one or more non-auxiliary subtypes should be counted.
+            // If shouldIncludeAuxiliarySubtypes is true, IMEs that have two or more auxiliary
+            // subtypes should be counted as well.
+            if (nonAuxCount > 0 || (shouldIncludeAuxiliarySubtypes && auxCount > 1)) {
+                ++filteredImisCount;
+                continue;
+            }
+        }
+
+        if (filteredImisCount > 1) {
+            return true;
+        }
+        final List<InputMethodSubtype> subtypes = imm.getEnabledInputMethodSubtypeList(null, true);
+        int keyboardCount = 0;
+        // imm.getEnabledInputMethodSubtypeList(null, true) will return the current IME's
+        // both explicitly and implicitly enabled input method subtype.
+        // (The current IME should be LatinIME.)
+        for (InputMethodSubtype subtype : subtypes) {
+            if (SubtypeSwitcher.KEYBOARD_MODE.equals(subtype.getMode())) {
+                ++keyboardCount;
+            }
+        }
+        return keyboardCount > 1;
+    }
+
+    public static InputMethodSubtype findSubtypeByLocaleAndKeyboardLayoutSet(
+            Context context, String localeString, String keyboardLayoutSetName) {
+        final InputMethodInfo imi = getInputMethodInfoOfThisIme(context);
+        final int count = imi.getSubtypeCount();
+        for (int i = 0; i < count; i++) {
+            final InputMethodSubtype subtype = imi.getSubtypeAt(i);
+            final String layoutName = SubtypeLocale.getKeyboardLayoutSetName(subtype);
+            if (localeString.equals(subtype.getLocale())
+                    && keyboardLayoutSetName.equals(layoutName)) {
+                return subtype;
+            }
+        }
+        throw new RuntimeException("Can't find subtype for locale " + localeString
+                + " and keyboard layout " + keyboardLayoutSetName);
+    }
+
+    public static void setAdditionalInputMethodSubtypes(Context context,
+            InputMethodSubtype[] subtypes) {
+        final InputMethodManager imm = getInputMethodManager(context);
+        final String imiId = getInputMethodIdOfThisIme(context);
+        imm.setAdditionalInputMethodSubtypes(imiId, subtypes);
+    }
+}