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/*
* 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.Log;
import android.util.TypedValue;
import java.util.HashMap;
public final class ResourceUtils {
private static final String TAG = ResourceUtils.class.getSimpleName();
private static final boolean DEBUG = false;
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 DEFAULT_PREFIX = "DEFAULT,";
private static final String HARDWARE_PREFIX = Build.HARDWARE + ",";
private static final HashMap<String, String> sDeviceOverrideValueMap =
CollectionUtils.newHashMap();
public static String getDeviceOverrideValue(final Resources res, final int overrideResId) {
final int orientation = res.getConfiguration().orientation;
final String key = overrideResId + "-" + orientation;
if (sDeviceOverrideValueMap.containsKey(key)) {
return sDeviceOverrideValueMap.get(key);
}
final String[] overrideArray = res.getStringArray(overrideResId);
final String overrideValue = StringUtils.findPrefixedString(HARDWARE_PREFIX, overrideArray);
// The overrideValue might be an empty string.
if (overrideValue != null) {
if (DEBUG) {
Log.d(TAG, "Find override value:"
+ " resource="+ res.getResourceEntryName(overrideResId)
+ " Build.HARDWARE=" + Build.HARDWARE + " override=" + overrideValue);
}
sDeviceOverrideValueMap.put(key, overrideValue);
return overrideValue;
}
final String defaultValue = StringUtils.findPrefixedString(DEFAULT_PREFIX, overrideArray);
// The defaultValue might be an empty string.
if (defaultValue == null) {
Log.w(TAG, "Couldn't find override value nor default value:"
+ " resource="+ res.getResourceEntryName(overrideResId)
+ " Build.HARDWARE=" + Build.HARDWARE);
} else if (DEBUG) {
Log.d(TAG, "Found default value:"
+ " resource="+ res.getResourceEntryName(overrideResId)
+ " Build.HARDWARE=" + Build.HARDWARE + " default=" + defaultValue);
}
sDeviceOverrideValueMap.put(key, defaultValue);
return defaultValue;
}
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(final TypedArray a, final int index, final int base,
final 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(final TypedArray a, final int index, final 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(final TypedValue v) {
return v.type == TypedValue.TYPE_FRACTION;
}
public static boolean isDimensionValue(final TypedValue v) {
return v.type == TypedValue.TYPE_DIMENSION;
}
public static boolean isIntegerValue(final TypedValue v) {
return v.type >= TypedValue.TYPE_FIRST_INT && v.type <= TypedValue.TYPE_LAST_INT;
}
public static boolean isStringValue(final TypedValue v) {
return v.type == TypedValue.TYPE_STRING;
}
}
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