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
17package com.android.documentsui;
18
19import static com.android.documentsui.services.FileOperationService.OPERATION_DELETE;
20import static com.android.documentsui.services.FileOperationService.OPERATION_MOVE;
21import static com.android.documentsui.services.FileOperationService.OPERATION_UNKNOWN;
22
23import android.app.Activity;
24import android.app.Fragment;
25import android.app.FragmentManager;
26import android.app.FragmentTransaction;
27import android.os.Bundle;
28import android.view.LayoutInflater;
29import android.view.View;
30import android.view.ViewGroup;
31import android.widget.Button;
32
33import com.android.documentsui.model.DocumentInfo;
34import com.android.documentsui.services.FileOperationService.OpType;
35
36/**
37 * Display pick confirmation bar, usually for selecting a directory.
38 */
39public 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