content: /*
   * Copyright (C) 2014 Hari Krishna Dulipudi
   * Copyright (C) 2013 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package dev.dworks.apps.anexplorer.fragment;
  
  import android.app.Fragment;
  import android.app.FragmentManager;
  import android.app.FragmentTransaction;
  import android.os.Bundle;
  import android.text.Editable;
  import android.text.TextUtils;
  import android.text.TextWatcher;
  import android.view.LayoutInflater;
  import android.view.View;
  import android.view.View.OnClickListener;
  import android.view.ViewGroup;
  import android.widget.EditText;
  import android.widget.ImageButton;
  import android.widget.ProgressBar;
  
  import dev.dworks.apps.anexplorer.BaseActivity;
  import dev.dworks.apps.anexplorer.R;
  import dev.dworks.apps.anexplorer.misc.FileUtils;
  import dev.dworks.apps.anexplorer.model.DocumentInfo;
  import dev.dworks.apps.anexplorer.setting.SettingsActivity;
  
  /**
   * Display document title editor and save button.
   */
  public class SaveFragment extends Fragment implements OnClickListener{
  	public static final String TAG = "SaveFragment";
  
  	private DocumentInfo mReplaceTarget;
  	private EditText mDisplayName;
  	private ImageButton mSave;
  	private ProgressBar mProgress;
  	private boolean mIgnoreNextEdit;
  
  	private ImageButton mCancel;
  
  	private static final String EXTRA_MIME_TYPE = "mime_type";
  	private static final String EXTRA_DISPLAY_NAME = "display_name";
  
  	public static void show(FragmentManager fm, String mimeType, String displayName) {
  		final Bundle args = new Bundle();
  		args.putString(EXTRA_MIME_TYPE, mimeType);
  		args.putString(EXTRA_DISPLAY_NAME, displayName);
  
  		final SaveFragment fragment = new SaveFragment();
  		fragment.setArguments(args);
  
  		final FragmentTransaction ft = fm.beginTransaction();
  		ft.replace(R.id.container_save, fragment, TAG);
  		ft.commitAllowingStateLoss();
  	}
  
  	public static SaveFragment get(FragmentManager fm) {
  		return (SaveFragment) fm.findFragmentByTag(TAG);
  	}
  	
  	public static void hide(FragmentManager fm){
  		if(null != get(fm)){
  			fm.beginTransaction().remove(get(fm)).commitAllowingStateLoss();
  		}
  	}
  
  	@Override
  	public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
  		final View view = inflater.inflate(R.layout.fragment_save, container, false);
  
  		view.findViewById(R.id.background).setBackgroundColor(SettingsActivity.getPrimaryColor());
  
  		mCancel = (ImageButton) view.findViewById(android.R.id.button2);
  		mCancel.setOnClickListener(this);
  
  		mDisplayName = (EditText) view.findViewById(android.R.id.title);
  		mDisplayName.addTextChangedListener(mDisplayNameWatcher);
  		mDisplayName.setText(getArguments().getString(EXTRA_DISPLAY_NAME));
  
  		mSave = (ImageButton) view.findViewById(android.R.id.button1);
  		mSave.setOnClickListener(this);
  		mSave.setEnabled(false);
  
  		mProgress = (ProgressBar) view.findViewById(android.R.id.progress);
  
  		return view;
  	}
  
  	private TextWatcher mDisplayNameWatcher = new TextWatcher() {
  		@Override
  		public void onTextChanged(CharSequence s, int start, int before, int count) {
  			if (mIgnoreNextEdit) {
  				mIgnoreNextEdit = false;
  			} else {
  				mReplaceTarget = null;
  			}
  		}
  
  		@Override
  		public void beforeTextChanged(CharSequence s, int start, int count, int after) {
  			// ignored
  		}
  
  		@Override
  		public void afterTextChanged(Editable s) {
  			// ignored
  		}
  	};
  	
  	/**
  	 * Set given document as target for in-place writing if user hits save
  	 * without changing the filename. Can be set to {@code null} if user
  	 * navigates outside the target directory.
  	 */
  	public void setReplaceTarget(DocumentInfo replaceTarget) {
  		mReplaceTarget = replaceTarget;
  
  		if (mReplaceTarget != null) {
  			getArguments().putString(EXTRA_DISPLAY_NAME, replaceTarget.displayName);
  			mIgnoreNextEdit = true;
  			mDisplayName.setText(replaceTarget.displayName);
  		}
  	}
  
  	public void setSaveEnabled(boolean enabled) {
  		mSave.setEnabled(enabled);
  	}
  
  	public void setPending(boolean pending) {
  		mSave.setVisibility(pending ? View.INVISIBLE : View.VISIBLE);
  		mProgress.setVisibility(pending ? View.VISIBLE : View.GONE);
  	}
  
  	@Override
  	public void onClick(View v) {
  		final BaseActivity activity = BaseActivity.get(SaveFragment.this);
  		switch (v.getId()) {
  		case android.R.id.button1:
  			if (mReplaceTarget != null) {
  				activity.onSaveRequested(mReplaceTarget);
  			} else {
  				final String mimeType = getArguments().getString(EXTRA_MIME_TYPE);
  				final String displayName = mDisplayName.getText().toString();
                  String extension = FileUtils.getExtFromFilename(displayName);
  				activity.onSaveRequested(TextUtils.isEmpty(extension) ? mimeType : extension, displayName);
  			}
  			break;
  
  		case android.R.id.button2:
  			getActivity().getFragmentManager().beginTransaction().remove(this).commit();
  			break;
  		}
  	}
  }