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      1 /*
      2  * Copyright (C) 2010 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.resources;
     18 
     19 
     20 /**
     21  * Density enum.
     22  * <p/>This is used in the manifest in the uses-configuration node and in the resource folder names
     23  * as well as other places needing to know the density values.
     24  */
     25 public enum Density implements ResourceEnum {
     26     XHIGH("xhdpi", "X-High Density", 320, 8), //$NON-NLS-1$
     27     HIGH("hdpi", "High Density", 240, 4), //$NON-NLS-1$
     28     TV("tvdpi", "TV Density", 213, 13), //$NON-NLS-1$
     29     MEDIUM("mdpi", "Medium Density", 160, 4), //$NON-NLS-1$
     30     LOW("ldpi", "Low Density", 120, 4), //$NON-NLS-1$
     31     NODPI("nodpi", "No Density", 0, 4); //$NON-NLS-1$
     32 
     33     public final static int DEFAULT_DENSITY = 160;
     34 
     35     private final String mValue;
     36     private final String mDisplayValue;
     37     private final int mDensity;
     38     private final int mSince;
     39 
     40     private Density(String value, String displayValue, int density, int since) {
     41         mValue = value;
     42         mDisplayValue = displayValue;
     43         mDensity = density;
     44         mSince = since;
     45     }
     46 
     47     /**
     48      * Returns the enum matching the provided qualifier value.
     49      * @param value The qualifier value.
     50      * @return the enum for the qualifier value or null if no match was found.
     51      */
     52     public static Density getEnum(String value) {
     53         for (Density orient : values()) {
     54             if (orient.mValue.equals(value)) {
     55                 return orient;
     56             }
     57         }
     58 
     59         return null;
     60     }
     61 
     62     /**
     63      * Returns the enum matching the given density value
     64      * @param value The density value.
     65      * @return the enum for the density value or null if no match was found.
     66      */
     67     public static Density getEnum(int value) {
     68         for (Density d : values()) {
     69             if (d.mDensity == value) {
     70                 return d;
     71             }
     72         }
     73 
     74         return null;
     75     }
     76 
     77     @Override
     78     public String getResourceValue() {
     79         return mValue;
     80     }
     81 
     82     public int getDpiValue() {
     83         return mDensity;
     84     }
     85 
     86     public int since() {
     87         return mSince;
     88     }
     89 
     90     public String getLegacyValue() {
     91         if (this != NODPI) {
     92             return String.format("%1$ddpi", getDpiValue());
     93         }
     94 
     95         return "";
     96     }
     97 
     98     @Override
     99     public String getShortDisplayValue() {
    100         return mDisplayValue;
    101     }
    102 
    103     @Override
    104     public String getLongDisplayValue() {
    105         return mDisplayValue;
    106     }
    107 
    108     public static int getIndex(Density value) {
    109         int i = 0;
    110         for (Density input : values()) {
    111             if (value == input) {
    112                 return i;
    113             }
    114 
    115             i++;
    116         }
    117 
    118         return -1;
    119     }
    120 
    121     public static Density getByIndex(int index) {
    122         int i = 0;
    123         for (Density value : values()) {
    124             if (i == index) {
    125                 return value;
    126             }
    127             i++;
    128         }
    129         return null;
    130     }
    131 
    132     @Override
    133     public boolean isFakeValue() {
    134         return false;
    135     }
    136 
    137     @Override
    138     public boolean isValidValueForDevice() {
    139         return this != NODPI; // nodpi is not a valid config for devices.
    140     }
    141 }
    142