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      1 /*
      2  * Copyright (C) 2015 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.camera.settings;
     18 
     19 import com.android.camera.CameraActivity;
     20 import com.android.camera.one.OneCamera;
     21 import com.android.camera2.R;
     22 
     23 import android.content.res.Resources;
     24 
     25 /**
     26  * Handles the camera facing setting for a particular scope stored in
     27  * SharedPreferences keyed by Keys.KEY_CAMERA_ID.
     28  */
     29 public class CameraFacingSetting {
     30     private final SettingsManager mSettingsManager;
     31 
     32     private final String mSettingScope;
     33 
     34     private final String mCameraFacingSettingKey;
     35 
     36     private final int mCameraFacingBackValue;
     37     private final int mCameraFacingFrontValue;
     38     private final int mCameraFacingDefaultValue;
     39 
     40     public CameraFacingSetting(
     41             Resources resources,
     42             SettingsManager settingsManager,
     43             String moduleSettingScope) {
     44         mSettingsManager = settingsManager;
     45 
     46         mSettingScope = SettingsManager.getModuleSettingScope(moduleSettingScope);
     47 
     48         mCameraFacingSettingKey = Keys.KEY_CAMERA_ID;
     49         mCameraFacingBackValue =
     50                 Integer.parseInt(resources.getString(R.string.pref_camera_id_entry_back_value));
     51         mCameraFacingFrontValue =
     52                 Integer.parseInt(resources.getString(R.string.pref_camera_id_entry_front_value));
     53         mCameraFacingDefaultValue =
     54                 Integer.parseInt(resources.getString(R.string.pref_camera_id_default));
     55     }
     56 
     57     @Override
     58     public String toString() {
     59         return isFacingBack() ? "Back Camera" : "Front Camera";
     60     }
     61 
     62     /**
     63      * Sets the default value for the camera facing setting.
     64      */
     65     public void setDefault() {
     66         mSettingsManager.setDefaults(
     67                 Keys.KEY_CAMERA_ID,
     68                 mCameraFacingDefaultValue,
     69                 new int[]{mCameraFacingBackValue, mCameraFacingFrontValue});
     70     }
     71 
     72     /**
     73      * Whether the back camera should be opened.
     74      *
     75      * @return Whether the back camera should be opened.
     76      */
     77     public boolean isFacingBack() {
     78         return getCameraFacing() == OneCamera.Facing.BACK;
     79     }
     80 
     81     /**
     82      * Whether the front camera should be opened.
     83      *
     84      * @return Whether the front camera should be opened.
     85      */
     86     public boolean isFacingFront() {
     87         return getCameraFacing() == OneCamera.Facing.FRONT;
     88     }
     89 
     90     /**
     91      * Gets the current camera facing in the setting.
     92      *
     93      * @return The current camera facing in the setting.
     94      */
     95     public OneCamera.Facing getCameraFacing() {
     96         final int cameraId = mSettingsManager.getInteger(mSettingScope, mCameraFacingSettingKey);
     97         if (cameraId == mCameraFacingBackValue) {
     98             return OneCamera.Facing.BACK;
     99         } else if (cameraId == mCameraFacingFrontValue) {
    100             return OneCamera.Facing.FRONT;
    101         } else {
    102             return getDefaultCameraFacing();
    103         }
    104     }
    105 
    106     /**
    107      * Sets the camera facing setting.
    108      *
    109      * @param cameraFacing The new camera facing.
    110      */
    111     public void setCameraFacing(OneCamera.Facing cameraFacing) {
    112         final int cameraId = (cameraFacing == OneCamera.Facing.BACK) ?
    113                 mCameraFacingBackValue : mCameraFacingFrontValue;
    114         mSettingsManager.set(mSettingScope, mCameraFacingSettingKey, cameraId);
    115     }
    116 
    117     /**
    118      * Changes the camera facing setting to the other side.
    119      *
    120      * @return The new camera facing.
    121      */
    122     public OneCamera.Facing switchCameraFacing() {
    123         final OneCamera.Facing originalFacing = getCameraFacing();
    124         final OneCamera.Facing newFacing = (originalFacing == OneCamera.Facing.BACK) ?
    125                 OneCamera.Facing.FRONT : OneCamera.Facing.BACK;
    126         setCameraFacing(newFacing);
    127         return newFacing;
    128     }
    129 
    130     private OneCamera.Facing getDefaultCameraFacing() {
    131         if (mCameraFacingDefaultValue == mCameraFacingBackValue) {
    132             return OneCamera.Facing.BACK;
    133         } else {
    134             return OneCamera.Facing.FRONT;
    135         }
    136     }
    137 }
    138