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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;
18 
19 import android.app.Fragment;
20 import android.app.FragmentManager;
21 import android.app.FragmentTransaction;
22 import android.content.Context;
23 import android.os.Bundle;
24 import android.text.Editable;
25 import android.text.TextUtils;
26 import android.text.TextWatcher;
27 import android.view.KeyEvent;
28 import android.view.LayoutInflater;
29 import android.view.View;
30 import android.view.ViewGroup;
31 import android.widget.Button;
32 import android.widget.EditText;
33 import android.widget.ImageView;
34 import android.widget.ProgressBar;
35 
36 import com.android.documentsui.model.DocumentInfo;
37 
38 /**
39  * Display document title editor and save button.
40  */
41 public class SaveFragment extends Fragment {
42     public static final String TAG = "SaveFragment";
43 
44     private DocumentInfo mReplaceTarget;
45     private EditText mDisplayName;
46     private Button mSave;
47     private ProgressBar mProgress;
48     private boolean mIgnoreNextEdit;
49 
50     private static final String EXTRA_MIME_TYPE = "mime_type";
51     private static final String EXTRA_DISPLAY_NAME = "display_name";
52 
show(FragmentManager fm, String mimeType, String displayName)53     public static void show(FragmentManager fm, String mimeType, String displayName) {
54         final Bundle args = new Bundle();
55         args.putString(EXTRA_MIME_TYPE, mimeType);
56         args.putString(EXTRA_DISPLAY_NAME, displayName);
57 
58         final SaveFragment fragment = new SaveFragment();
59         fragment.setArguments(args);
60 
61         final FragmentTransaction ft = fm.beginTransaction();
62         ft.replace(R.id.container_save, fragment, TAG);
63         ft.commitAllowingStateLoss();
64     }
65 
get(FragmentManager fm)66     public static SaveFragment get(FragmentManager fm) {
67         return (SaveFragment) fm.findFragmentByTag(TAG);
68     }
69 
70     @Override
onCreateView( LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)71     public View onCreateView(
72             LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
73         final Context context = inflater.getContext();
74 
75         final View view = inflater.inflate(R.layout.fragment_save, container, false);
76 
77         final ImageView icon = (ImageView) view.findViewById(android.R.id.icon);
78         icon.setImageDrawable(
79                 IconUtils.loadMimeIcon(context, getArguments().getString(EXTRA_MIME_TYPE)));
80 
81         mDisplayName = (EditText) view.findViewById(android.R.id.title);
82         mDisplayName.addTextChangedListener(mDisplayNameWatcher);
83         mDisplayName.setText(getArguments().getString(EXTRA_DISPLAY_NAME));
84         mDisplayName.setOnKeyListener(
85                 new View.OnKeyListener() {
86                     @Override
87                     public boolean onKey(View v, int keyCode, KeyEvent event) {
88                         // Only handle key-down events. This is simpler, consistent with most other
89                         // UIs, and enables the handling of repeated key events from holding down a
90                         // key.
91                         if (event.getAction() != KeyEvent.ACTION_DOWN) {
92                             return false;
93                         }
94 
95                         // Returning false in this method will bubble the event up to
96                         // {@link BaseActivity#onKeyDown}. In order to prevent backspace popping
97                         // documents once the textView is empty, we are going to trap it here.
98                         if (keyCode == KeyEvent.KEYCODE_DEL
99                                 && TextUtils.isEmpty(mDisplayName.getText())) {
100                             return true;
101                         }
102 
103                         if (keyCode == KeyEvent.KEYCODE_ENTER && mSave.isEnabled()) {
104                             performSave();
105                             return true;
106                         }
107                         return false;
108                     }
109                 });
110 
111         mSave = (Button) view.findViewById(android.R.id.button1);
112         mSave.setOnClickListener(mSaveListener);
113         mSave.setEnabled(false);
114 
115         mProgress = (ProgressBar) view.findViewById(android.R.id.progress);
116 
117         return view;
118     }
119 
120     private TextWatcher mDisplayNameWatcher = new TextWatcher() {
121         @Override
122         public void onTextChanged(CharSequence s, int start, int before, int count) {
123             if (mIgnoreNextEdit) {
124                 mIgnoreNextEdit = false;
125             } else {
126                 mReplaceTarget = null;
127             }
128         }
129 
130         @Override
131         public void beforeTextChanged(CharSequence s, int start, int count, int after) {
132             // ignored
133         }
134 
135         @Override
136         public void afterTextChanged(Editable s) {
137             // ignored
138         }
139     };
140 
141     private View.OnClickListener mSaveListener = new View.OnClickListener() {
142         @Override
143         public void onClick(View v) {
144             performSave();
145         }
146 
147     };
148 
performSave()149     private void performSave() {
150         final DocumentsActivity activity = DocumentsActivity.get(SaveFragment.this);
151         if (mReplaceTarget != null) {
152             activity.onSaveRequested(mReplaceTarget);
153         } else {
154             final String mimeType = getArguments().getString(EXTRA_MIME_TYPE);
155             final String displayName = mDisplayName.getText().toString();
156             activity.onSaveRequested(mimeType, displayName);
157         }
158     }
159 
160     /**
161      * Set given document as target for in-place writing if user hits save
162      * without changing the filename. Can be set to {@code null} if user
163      * navigates outside the target directory.
164      */
setReplaceTarget(DocumentInfo replaceTarget)165     public void setReplaceTarget(DocumentInfo replaceTarget) {
166         mReplaceTarget = replaceTarget;
167 
168         if (mReplaceTarget != null) {
169             getArguments().putString(EXTRA_DISPLAY_NAME, replaceTarget.displayName);
170             mIgnoreNextEdit = true;
171             mDisplayName.setText(replaceTarget.displayName);
172         }
173     }
174 
prepareForDirectory(DocumentInfo cwd)175     public void prepareForDirectory(DocumentInfo cwd) {
176         setSaveEnabled(cwd != null && cwd.isCreateSupported());
177     }
178 
setSaveEnabled(boolean enabled)179     private void setSaveEnabled(boolean enabled) {
180         mSave.setEnabled(enabled);
181     }
182 
setPending(boolean pending)183     public void setPending(boolean pending) {
184         mSave.setVisibility(pending ? View.INVISIBLE : View.VISIBLE);
185         mProgress.setVisibility(pending ? View.VISIBLE : View.GONE);
186     }
187 }
188