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