1 /*
2  * Copyright (C) 2016 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.picker;
18 
19 import static com.android.documentsui.base.State.ACTION_CREATE;
20 import static com.android.documentsui.base.State.ACTION_GET_CONTENT;
21 import static com.android.documentsui.base.State.ACTION_OPEN;
22 import static com.android.documentsui.base.State.ACTION_OPEN_TREE;
23 import static com.android.documentsui.base.State.ACTION_PICK_COPY_DESTINATION;
24 
25 import android.provider.DocumentsContract.Document;
26 
27 import com.android.documentsui.ActivityConfig;
28 import com.android.documentsui.base.MimeTypes;
29 import com.android.documentsui.base.State;
30 
31 /**
32  * Provides support for Platform specific specializations of DirectoryFragment.
33  */
34 final class Config extends ActivityConfig {
35 
36     @Override
canSelectType(String docMimeType, int docFlags, State state)37     public boolean canSelectType(String docMimeType, int docFlags, State state) {
38         if (!isDocumentEnabled(docMimeType, docFlags, state)) {
39             return false;
40         }
41 
42         if (MimeTypes.isDirectoryType(docMimeType)) {
43             return false;
44         }
45 
46         if (state.action == ACTION_OPEN_TREE || state.action == ACTION_PICK_COPY_DESTINATION) {
47             // In this case nothing *ever* is selectable...the expected user behavior is
48             // they navigate *into* a folder, then click a confirmation button indicating
49             // that the current directory is the directory they are picking.
50             return false;
51         }
52 
53         return true;
54     }
55 
56     @Override
isDocumentEnabled(String mimeType, int docFlags, State state)57     public boolean isDocumentEnabled(String mimeType, int docFlags, State state) {
58         // Directories are always enabled.
59         if (MimeTypes.isDirectoryType(mimeType)) {
60             return true;
61         }
62 
63         switch (state.action) {
64             case ACTION_PICK_COPY_DESTINATION:
65                 return false;
66             case ACTION_CREATE:
67                 // Read-only files are disabled when creating.
68                 if ((docFlags & Document.FLAG_SUPPORTS_WRITE) == 0) {
69                     return false;
70                 }
71             case ACTION_OPEN:
72             case ACTION_GET_CONTENT:
73                 final boolean isVirtual = (docFlags & Document.FLAG_VIRTUAL_DOCUMENT) != 0;
74                 if (isVirtual && state.openableOnly) {
75                     return false;
76                 }
77         }
78 
79         return MimeTypes.mimeMatches(state.acceptMimes, mimeType);
80     }
81 }
82