1 files changed, 128 insertions, 0 deletions
diff --git a/java/src/com/android/inputmethod/latin/ResourceUtils.java b/java/src/com/android/inputmethod/latin/ResourceUtils.java
new file mode 100644
index 000000000..5021ad384
--- /dev/null
+++ b/java/src/com/android/inputmethod/latin/ResourceUtils.java
@@ -0,0 +1,128 @@
+/*
+ * 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.res.Resources;
+import android.content.res.TypedArray;
+import android.os.Build;
+import android.util.TypedValue;
+
+import java.util.HashMap;
+
+public final class ResourceUtils {
+    public static final float UNDEFINED_RATIO = -1.0f;
+    public static final int UNDEFINED_DIMENSION = -1;
+
+    private ResourceUtils() {
+        // This utility class is not publicly instantiable.
+    }
+
+    private static final String HARDWARE_PREFIX = Build.HARDWARE + ",";
+    private static final HashMap<String, String> sDeviceOverrideValueMap =
+            CollectionUtils.newHashMap();
+
+    public static String getDeviceOverrideValue(Resources res, int overrideResId, String defValue) {
+        final int orientation = res.getConfiguration().orientation;
+        final String key = overrideResId + "-" + orientation;
+        if (!sDeviceOverrideValueMap.containsKey(key)) {
+            String overrideValue = defValue;
+            for (final String element : res.getStringArray(overrideResId)) {
+                if (element.startsWith(HARDWARE_PREFIX)) {
+                    overrideValue = element.substring(HARDWARE_PREFIX.length());
+                    break;
+                }
+            }
+            sDeviceOverrideValueMap.put(key, overrideValue);
+        }
+        return sDeviceOverrideValueMap.get(key);
+    }
+
+    public static boolean isValidFraction(final float fraction) {
+        return fraction >= 0.0f;
+    }
+
+    // {@link Resources#getDimensionPixelSize(int)} returns at least one pixel size.
+    public static boolean isValidDimensionPixelSize(final int dimension) {
+        return dimension > 0;
+    }
+
+    // {@link Resources#getDimensionPixelOffset(int)} may return zero pixel offset.
+    public static boolean isValidDimensionPixelOffset(final int dimension) {
+        return dimension >= 0;
+    }
+
+    public static float getFraction(final TypedArray a, final int index, final float defValue) {
+        final TypedValue value = a.peekValue(index);
+        if (value == null || !isFractionValue(value)) {
+            return defValue;
+        }
+        return a.getFraction(index, 1, 1, defValue);
+    }
+
+    public static float getFraction(final TypedArray a, final int index) {
+        return getFraction(a, index, UNDEFINED_RATIO);
+    }
+
+    public static int getDimensionPixelSize(final TypedArray a, final int index) {
+        final TypedValue value = a.peekValue(index);
+        if (value == null || !isDimensionValue(value)) {
+            return ResourceUtils.UNDEFINED_DIMENSION;
+        }
+        return a.getDimensionPixelSize(index, ResourceUtils.UNDEFINED_DIMENSION);
+    }
+
+    public static float getDimensionOrFraction(TypedArray a, int index, int base,
+            float defValue) {
+        final TypedValue value = a.peekValue(index);
+        if (value == null) {
+            return defValue;
+        }
+        if (isFractionValue(value)) {
+            return a.getFraction(index, base, base, defValue);
+        } else if (isDimensionValue(value)) {
+            return a.getDimension(index, defValue);
+        }
+        return defValue;
+    }
+
+    public static int getEnumValue(TypedArray a, int index, int defValue) {
+        final TypedValue value = a.peekValue(index);
+        if (value == null) {
+            return defValue;
+        }
+        if (isIntegerValue(value)) {
+            return a.getInt(index, defValue);
+        }
+        return defValue;
+    }
+
+    public static boolean isFractionValue(TypedValue v) {
+        return v.type == TypedValue.TYPE_FRACTION;
+    }
+
+    public static boolean isDimensionValue(TypedValue v) {
+        return v.type == TypedValue.TYPE_DIMENSION;
+    }
+
+    public static boolean isIntegerValue(TypedValue v) {
+        return v.type >= TypedValue.TYPE_FIRST_INT && v.type <= TypedValue.TYPE_LAST_INT;
+    }
+
+    public static boolean isStringValue(TypedValue v) {
+        return v.type == TypedValue.TYPE_STRING;
+    }
+}