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      1 /*
      2  * Copyright (C) 2014 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.documentsui;
     18 
     19 import static com.android.documentsui.services.FileOperationService.OPERATION_DELETE;
     20 import static com.android.documentsui.services.FileOperationService.OPERATION_MOVE;
     21 import static com.android.documentsui.services.FileOperationService.OPERATION_UNKNOWN;
     22 
     23 import android.app.Activity;
     24 import android.app.Fragment;
     25 import android.app.FragmentManager;
     26 import android.app.FragmentTransaction;
     27 import android.os.Bundle;
     28 import android.view.LayoutInflater;
     29 import android.view.View;
     30 import android.view.ViewGroup;
     31 import android.widget.Button;
     32 
     33 import com.android.documentsui.model.DocumentInfo;
     34 import com.android.documentsui.services.FileOperationService.OpType;
     35 
     36 /**
     37  * Display pick confirmation bar, usually for selecting a directory.
     38  */
     39 public class PickFragment extends Fragment {
     40     public static final String TAG = "PickFragment";
     41 
     42     private int mAction;
     43     // Only legal values are OPERATION_COPY, OPERATION_MOVE, and unset (OPERATION_UNKNOWN).
     44     private @OpType int mCopyOperationSubType = OPERATION_UNKNOWN;
     45     private DocumentInfo mPickTarget;
     46     private View mContainer;
     47     private Button mPick;
     48     private Button mCancel;
     49 
     50     public static void show(FragmentManager fm) {
     51         // Fragment can be restored by FragmentManager automatically.
     52         if (get(fm) != null) {
     53             return;
     54         }
     55 
     56         final PickFragment fragment = new PickFragment();
     57         final FragmentTransaction ft = fm.beginTransaction();
     58         ft.replace(R.id.container_save, fragment, TAG);
     59         ft.commitAllowingStateLoss();
     60     }
     61 
     62     public static PickFragment get(FragmentManager fm) {
     63         return (PickFragment) fm.findFragmentByTag(TAG);
     64     }
     65 
     66     @Override
     67     public View onCreateView(
     68             LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
     69         mContainer = inflater.inflate(R.layout.fragment_pick, container, false);
     70 
     71         mPick = (Button) mContainer.findViewById(android.R.id.button1);
     72         mPick.setOnClickListener(mPickListener);
     73 
     74         mCancel = (Button) mContainer.findViewById(android.R.id.button2);
     75         mCancel.setOnClickListener(mCancelListener);
     76 
     77         updateView();
     78         return mContainer;
     79     }
     80 
     81     private View.OnClickListener mPickListener = new View.OnClickListener() {
     82         @Override
     83         public void onClick(View v) {
     84             final DocumentsActivity activity = DocumentsActivity.get(PickFragment.this);
     85             activity.onPickRequested(mPickTarget);
     86         }
     87     };
     88 
     89     private View.OnClickListener mCancelListener = new View.OnClickListener() {
     90         @Override
     91         public void onClick(View v) {
     92             final BaseActivity activity = BaseActivity.get(PickFragment.this);
     93             activity.setResult(Activity.RESULT_CANCELED);
     94             activity.finish();
     95         }
     96     };
     97 
     98     /**
     99      * @param action Which action defined in State is the picker shown for.
    100      */
    101     public void setPickTarget(
    102             int action, @OpType int copyOperationSubType, DocumentInfo pickTarget) {
    103         assert(copyOperationSubType != OPERATION_DELETE);
    104 
    105         mAction = action;
    106         mCopyOperationSubType = copyOperationSubType;
    107         mPickTarget = pickTarget;
    108         if (mContainer != null) {
    109             updateView();
    110         }
    111     }
    112 
    113     /**
    114      * Applies the state of fragment to the view components.
    115      */
    116     private void updateView() {
    117         switch (mAction) {
    118             case State.ACTION_OPEN_TREE:
    119                 mPick.setText(R.string.button_select);
    120                 mCancel.setVisibility(View.GONE);
    121                 break;
    122             case State.ACTION_PICK_COPY_DESTINATION:
    123                 mPick.setText(mCopyOperationSubType == OPERATION_MOVE
    124                         ? R.string.button_move : R.string.button_copy);
    125                 mCancel.setVisibility(View.VISIBLE);
    126                 break;
    127             default:
    128                 mContainer.setVisibility(View.GONE);
    129                 return;
    130         }
    131 
    132         if (mPickTarget != null && (
    133                 mAction == State.ACTION_OPEN_TREE ||
    134                 mPickTarget.isCreateSupported())) {
    135             mContainer.setVisibility(View.VISIBLE);
    136         } else {
    137             mContainer.setVisibility(View.GONE);
    138         }
    139     }
    140 }
    141