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/*
* Copyright (C) 2013 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.printspooler.util;
import android.content.Context;
import android.print.PrintAttributes.MediaSize;
import android.util.ArrayMap;
import com.android.printspooler.R;
import java.util.Comparator;
import java.util.Map;
/**
* Utility functions and classes for dealing with media sizes.
*/
public final class MediaSizeUtils {
private static Map<MediaSize, String> sMediaSizeToStandardMap;
private MediaSizeUtils() {
/* do nothing - hide constructor */
}
/**
* Gets the default media size for the current locale.
*
* @param context Context for accessing resources.
* @return The default media size.
*/
public static MediaSize getDefault(Context context) {
String mediaSizeId = context.getString(R.string.mediasize_default);
return MediaSize.getStandardMediaSizeById(mediaSizeId);
}
private static String getStandardForMediaSize(Context context, MediaSize mediaSize) {
if (sMediaSizeToStandardMap == null) {
sMediaSizeToStandardMap = new ArrayMap<MediaSize, String>();
String[] mediaSizeToStandardMapValues = context.getResources()
.getStringArray(R.array.mediasize_to_standard_map);
final int mediaSizeToStandardCount = mediaSizeToStandardMapValues.length;
for (int i = 0; i < mediaSizeToStandardCount; i += 2) {
String mediaSizeId = mediaSizeToStandardMapValues[i];
MediaSize key = MediaSize.getStandardMediaSizeById(mediaSizeId);
String value = mediaSizeToStandardMapValues[i + 1];
sMediaSizeToStandardMap.put(key, value);
}
}
String standard = sMediaSizeToStandardMap.get(mediaSize);
return (standard != null) ? standard : context.getString(
R.string.mediasize_standard_iso);
}
/**
* Comparator for ordering standard media sizes. The ones for the current
* standard go to the top and the ones for the other standards follow grouped
* by standard. Media sizes of the same standard are ordered alphabetically.
*/
public static final class MediaSizeComparator implements Comparator<MediaSize> {
private final Context mContext;
public MediaSizeComparator(Context context) {
mContext = context;
}
@Override
public int compare(MediaSize lhs, MediaSize rhs) {
String currentStandard = mContext.getString(R.string.mediasize_standard);
String lhsStandard = getStandardForMediaSize(mContext, lhs);
String rhsStandard = getStandardForMediaSize(mContext, rhs);
// The current standard always wins.
if (lhsStandard.equals(currentStandard)) {
if (!rhsStandard.equals(currentStandard)) {
return -1;
}
} else if (rhsStandard.equals(currentStandard)) {
return 1;
}
if (!lhsStandard.equals(rhsStandard)) {
// Different standards - use the standard ordering.
return lhsStandard.compareTo(rhsStandard);
} else {
// Same standard - sort alphabetically by label.
return lhs.getLabel(mContext.getPackageManager()).
compareTo(rhs.getLabel(mContext.getPackageManager()));
}
}
}
}
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