1 /*
2  * Copyright (C) 2013 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 android.content.Context;
20 import android.os.Bundle;
21 import android.text.Editable;
22 import android.text.TextUtils;
23 import android.text.TextWatcher;
24 import android.view.KeyEvent;
25 import android.view.LayoutInflater;
26 import android.view.View;
27 import android.view.ViewGroup;
28 import android.widget.Button;
29 import android.widget.EditText;
30 import android.widget.ImageView;
31 import android.widget.ProgressBar;
32 import android.widget.TextView;
33 
34 import androidx.fragment.app.Fragment;
35 import androidx.fragment.app.FragmentManager;
36 import androidx.fragment.app.FragmentTransaction;
37 
38 import com.android.documentsui.IconUtils;
39 import com.android.documentsui.Injector;
40 import com.android.documentsui.R;
41 import com.android.documentsui.base.BooleanConsumer;
42 import com.android.documentsui.base.DocumentInfo;
43 import com.android.documentsui.base.Shared;
44 
45 /**
46  * Display document title editor and save button.
47  */
48 public class SaveFragment extends Fragment {
49     public static final String TAG = "SaveFragment";
50 
51     private final BooleanConsumer mInProgressStateListener = this::setPending;
52 
53     private Injector<ActionHandler<PickActivity>> mInjector;
54     private DocumentInfo mReplaceTarget;
55     private EditText mDisplayName;
56     private TextView mSave;
57     private ProgressBar mProgress;
58     private boolean mIgnoreNextEdit;
59 
60     private static final String EXTRA_MIME_TYPE = "mime_type";
61     private static final String EXTRA_DISPLAY_NAME = "display_name";
62 
show(FragmentManager fm, String mimeType, String displayName)63     static void show(FragmentManager fm, String mimeType, String displayName) {
64         final Bundle args = new Bundle();
65         args.putString(EXTRA_MIME_TYPE, mimeType);
66         args.putString(EXTRA_DISPLAY_NAME, displayName);
67 
68         final SaveFragment fragment = new SaveFragment();
69         fragment.setArguments(args);
70 
71         final FragmentTransaction ft = fm.beginTransaction();
72         ft.replace(R.id.container_save, fragment, TAG);
73         ft.commitAllowingStateLoss();
74     }
75 
get(FragmentManager fm)76     public static SaveFragment get(FragmentManager fm) {
77         return (SaveFragment) fm.findFragmentByTag(TAG);
78     }
79 
80     @Override
onCreateView( LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)81     public View onCreateView(
82             LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
83         final Context context = inflater.getContext();
84 
85         final View view = inflater.inflate(R.layout.fragment_save, container, false);
86 
87         final ImageView icon = (ImageView) view.findViewById(android.R.id.icon);
88         icon.setImageDrawable(
89                 IconUtils.loadMimeIcon(context, getArguments().getString(EXTRA_MIME_TYPE)));
90 
91         mDisplayName = (EditText) view.findViewById(android.R.id.title);
92         mDisplayName.addTextChangedListener(mDisplayNameWatcher);
93         mDisplayName.setText(getArguments().getString(EXTRA_DISPLAY_NAME));
94         mDisplayName.setOnKeyListener(
95                 new View.OnKeyListener() {
96                     @Override
97                     public boolean onKey(View v, int keyCode, KeyEvent event) {
98                         // Only handle key-down events. This is simpler, consistent with most other
99                         // UIs, and enables the handling of repeated key events from holding down a
100                         // key.
101                         if (event.getAction() != KeyEvent.ACTION_DOWN) {
102                             return false;
103                         }
104 
105                         // Returning false in this method will bubble the event up to
106                         // {@link BaseActivity#onKeyDown}. In order to prevent backspace popping
107                         // documents once the textView is empty, we are going to trap it here.
108                         if (keyCode == KeyEvent.KEYCODE_DEL
109                                 && TextUtils.isEmpty(mDisplayName.getText())) {
110                             return true;
111                         }
112 
113                         if (keyCode == KeyEvent.KEYCODE_ENTER && mSave.isEnabled()) {
114                             performSave();
115                             return true;
116                         }
117                         return false;
118                     }
119                 });
120 
121         mSave = (Button) view.findViewById(android.R.id.button1);
122         mSave.setOnClickListener(mSaveListener);
123         mSave.setEnabled(false);
124 
125         mProgress = (ProgressBar) view.findViewById(android.R.id.progress);
126 
127         return view;
128     }
129 
130     @Override
onActivityCreated(Bundle savedInstanceState)131     public void onActivityCreated(Bundle savedInstanceState) {
132         super.onActivityCreated(savedInstanceState);
133         mInjector = ((PickActivity) getActivity()).getInjector();
134 
135         if (savedInstanceState != null) {
136             mReplaceTarget = savedInstanceState.getParcelable(Shared.EXTRA_DOC);
137         }
138     }
139 
140     @Override
onSaveInstanceState(Bundle outBundle)141     public void onSaveInstanceState(Bundle outBundle) {
142         super.onSaveInstanceState(outBundle);
143 
144         outBundle.putParcelable(Shared.EXTRA_DOC, mReplaceTarget);
145     }
146 
147     private TextWatcher mDisplayNameWatcher = new TextWatcher() {
148         @Override
149         public void onTextChanged(CharSequence s, int start, int before, int count) {
150             if (mIgnoreNextEdit) {
151                 mIgnoreNextEdit = false;
152             } else {
153                 mReplaceTarget = null;
154             }
155         }
156 
157         @Override
158         public void beforeTextChanged(CharSequence s, int start, int count, int after) {
159             // ignored
160         }
161 
162         @Override
163         public void afterTextChanged(Editable s) {
164             // ignored
165         }
166     };
167 
168     private View.OnClickListener mSaveListener = new View.OnClickListener() {
169         @Override
170         public void onClick(View v) {
171             performSave();
172         }
173 
174     };
175 
performSave()176     private void performSave() {
177         if (mReplaceTarget != null) {
178             mInjector.actions.saveDocument(getChildFragmentManager(), mReplaceTarget);
179         } else {
180             final String mimeType = getArguments().getString(EXTRA_MIME_TYPE);
181             final String displayName = mDisplayName.getText().toString();
182             mInjector.actions.saveDocument(mimeType, displayName, mInProgressStateListener);
183         }
184     }
185 
186     /**
187      * Set given document as target for in-place writing if user hits save
188      * without changing the filename. Can be set to {@code null} if user
189      * navigates outside the target directory.
190      */
setReplaceTarget(DocumentInfo replaceTarget)191     public void setReplaceTarget(DocumentInfo replaceTarget) {
192         mReplaceTarget = replaceTarget;
193 
194         if (mReplaceTarget != null) {
195             getArguments().putString(EXTRA_DISPLAY_NAME, replaceTarget.displayName);
196             mIgnoreNextEdit = true;
197             mDisplayName.setText(replaceTarget.displayName);
198         }
199     }
200 
prepareForDirectory(DocumentInfo cwd)201     public void prepareForDirectory(DocumentInfo cwd) {
202         setSaveEnabled(cwd != null && cwd.isCreateSupported());
203     }
204 
setSaveEnabled(boolean enabled)205     private void setSaveEnabled(boolean enabled) {
206         mSave.setEnabled(enabled);
207     }
208 
setPending(boolean pending)209     private void setPending(boolean pending) {
210         mSave.setVisibility(pending ? View.INVISIBLE : View.VISIBLE);
211         mProgress.setVisibility(pending ? View.VISIBLE : View.GONE);
212     }
213 }
214