fiore@0: /*  
fiore@0:  CCmI Diagram Editor for Android 
fiore@0:   
fiore@0:  Copyright (C) 2012  Queen Mary University of London (http://ccmi.eecs.qmul.ac.uk/)
fiore@0: 
fiore@0:  This program is free software: you can redistribute it and/or modify
fiore@0:  it under the terms of the GNU General Public License as published by
fiore@0:  the Free Software Foundation, either version 3 of the License, or
fiore@0:  (at your option) any later version.
fiore@0: 
fiore@0:  This program is distributed in the hope that it will be useful,
fiore@0:  but WITHOUT ANY WARRANTY; without even the implied warranty of
fiore@0:  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
fiore@0:  GNU General Public License for more details.
fiore@0: 
fiore@0:  You should have received a copy of the GNU General Public License
fiore@0:  along with this program.  If not, see <http://www.gnu.org/licenses/>.
fiore@0: */
fiore@0: package uk.ac.qmul.eecs.ccmi.activities;
fiore@0: 
fiore@0: import java.io.File;
fiore@0: import java.io.FileInputStream;
fiore@0: import java.io.FileOutputStream;
fiore@0: import java.io.InputStream;
fiore@0: import java.io.OutputStream;
fiore@0: 
fiore@0: import org.simpleframework.xml.Serializer;
fiore@0: import org.simpleframework.xml.core.Persister;
fiore@0: 
fiore@0: import uk.ac.qmul.eecs.ccmi.accessibility.AccessibilityService;
fiore@0: import uk.ac.qmul.eecs.ccmi.accessibility.AccessibilityService.SoundEvent;
fiore@0: import uk.ac.qmul.eecs.ccmi.accessibility.AccessibleDialogBuilder;
fiore@1: import uk.ac.qmul.eecs.ccmi.utilities.ILogger;
fiore@0: import uk.ac.qmul.eecs.ccmi.xmlparser.Diagram;
fiore@0: import android.content.Intent;
fiore@0: import android.content.res.AssetManager;
fiore@0: import android.os.Bundle;
fiore@0: import android.support.v4.app.DialogFragment;
fiore@0: import android.view.View;
fiore@0: import android.widget.AdapterView;
fiore@0: import android.widget.AdapterView.OnItemClickListener;
fiore@0: import android.widget.AdapterView.OnItemLongClickListener;
fiore@0: import android.widget.ArrayAdapter;
fiore@1: import android.widget.TextView;
fiore@0: 
fiore@0: /**
fiore@0:  * 
fiore@0:  * The main activity. It displays the diagram through the hierarchical view 
fiore@0:  * of the <a href="http://ccmi.eecs.qmul.ac.uk"> CCmI Diagram Editor </a>      
fiore@0:  *
fiore@0:  */
fiore@0: public class CcmiEditorAppActivity extends AccessibleActivity implements 
fiore@0: 		OnItemClickListener, OnItemLongClickListener, TreeNavigation.Updateable {
fiore@0: 	private final static int OPEN_REQUEST = 1;
fiore@0: 	private final static int SAVE_REQUEST = 2;
fiore@0: 	private final static String CCMI_EXTENSION = ".ccmi";
fiore@0: 	
fiore@0: 	private Diagram diagram;
fiore@0: 	private TreeNavigation navigation; 
fiore@0: 	
fiore@0: 	private String file;
fiore@0: 	private InputStream in;
fiore@0: 	
fiore@0: 	public String getName(){
fiore@0: 		return "";
fiore@0: 	}
fiore@0: 	
fiore@0: 	/** Called when the activity is first created. */
fiore@0: 	@Override
fiore@0: 	public void onCreate(Bundle savedInstanceState) {
fiore@0: 		super.onCreate(savedInstanceState);
fiore@0:         
fiore@0: 		list.setOnItemClickListener(this);
fiore@0: 		list.setOnItemLongClickListener(this);
fiore@0: 		
fiore@1: 
fiore@1: 		ILogger.log("--- APPLICATION STARTED ---");
fiore@1: 		
fiore@1: 		
fiore@0: 		/* init assets */
fiore@0: 		AssetManager assetManager = getAssets();
fiore@0: 		try {
fiore@0: 			file = assetManager.list("diagrams")[0];
fiore@0: 			in = assetManager.open("diagrams/"+file);
fiore@0: 			readXML(in);
fiore@0: 		} catch (Exception e) {
fiore@0: 			e.printStackTrace();
fiore@0: 			throw new RuntimeException(e);
fiore@0: 		}
fiore@0: 	}
fiore@0: 	
fiore@0: 	/* create a new list and display it */
fiore@0: 	@Override
fiore@0: 	public void update(){
fiore@0: 		/* header */
fiore@0: 		setHeaderText(navigation.getCurrentItemName());
fiore@0: 		/* list */
fiore@0: 		ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,R.layout.list_item_1,navigation.getCurrentChildList());
fiore@0: 		list.setAdapter(adapter);
fiore@0: 	}
fiore@0: 	
fiore@0: 	/*----- listeners to implement the navigation ----*/
fiore@0: 	@Override
fiore@0: 	public void onItemClick(AdapterView<?> av, View v, int pos, long id) {
fiore@1: 		ILogger.logTap(((TextView)v).getText());
fiore@0: 		if(!navigation.goNext(pos)){
fiore@0: 			accessibilityService.playSound(AccessibilityService.SoundEvent.V_ERROR);
fiore@1: 			ILogger.logError("end of tree");
fiore@0: 			return;
fiore@0: 		}
fiore@0: 		accessibilityService.playSound(AccessibilityService.SoundEvent.V_EXPAND);
fiore@1: 		accessibilityService.speak("displaying " + getHeaderText());
fiore@1: 		ILogger.logActivity(getHeaderText());
fiore@0: 	}
fiore@0: 	
fiore@0: 	/**
fiore@0: 	 * The activity listens to long clicks performed on the list view.
fiore@0: 	 * 
fiore@0: 	 * When a user long clicks an item, a dialog is displayed accordingly. For example if the types of nodes and 
fiore@0: 	 * edges are listed when the user long clicks, then a dialog for insertion of a new node or edge is displayed.    
fiore@0: 	 */
fiore@0: 	@Override
fiore@0: 	public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
fiore@1: 		ILogger.logLongTap(((TextView)view).getText());
fiore@0: 		boolean doneSomething = navigation.getController().performEditAction(parent, view, position, id, this);
fiore@1: 		if(!doneSomething){
fiore@0: 			accessibilityService.playSound(AccessibilityService.SoundEvent.V_ERROR);
fiore@1: 			ILogger.logError("no action available on this item");
fiore@1: 		}
fiore@0: 		return doneSomething;
fiore@0: 	}
fiore@0: 
fiore@0: 	/**
fiore@0: 	 * When the back button is pressed the activity will cursor back in the tree 
fiore@0: 	 * view, which means the parent of the currently displayed items will be displayed
fiore@0: 	 * together with its siblings. 
fiore@0: 	 */
fiore@0: 	@Override
fiore@0: 	public void onBackPressed() {
fiore@1: 		ILogger.logTap("back");
fiore@0: 		if(navigation.goPrevious()){
fiore@0: 			accessibilityService.playSound(SoundEvent.V_COLLAPSE);
fiore@0: 			accessibilityService.speak("Displaying "+getHeaderText());
fiore@1: 			ILogger.logActivity(getHeaderText());
fiore@0: 			update();
fiore@0: 		}else{
fiore@0: 			accessibilityService.playSound(SoundEvent.V_EDITING_MODE, true);
fiore@0: 			dialogBuilder.displayDialog(R.layout.alert_dialog_confirm_exit,"Exit Dialog",new AccessibleDialogBuilder.ButtonClickListener() {
fiore@0: 				@Override
fiore@0: 				public void onClick(View v, DialogFragment dialogFragment, String tag) {
fiore@0: 					if("EXIT".equals(v.getTag())){
fiore@1: 						ILogger.logButton("exit");
fiore@0: 						accessibilityService.speak(getResources().getString(R.string.exitMessage));
fiore@1: 						ILogger.log("--- EXIT ---");
fiore@1: 						ILogger.dispose();
fiore@0: 						finish();
fiore@0: 					}else if("CANCEL".equals(v.getTag())){
fiore@1: 						ILogger.logButton("cancel");
fiore@1: 						accessibilityService.playSound(SoundEvent.V_CANCEL);
fiore@0: 						accessibilityService.speak("Cancel");
fiore@0: 						accessibilityService.stopSound();
fiore@0: 						dialogFragment.dismiss();
fiore@0: 					}else if("OPEN".equals(v.getTag())){
fiore@1: 						ILogger.logButton("open");
fiore@0: 						/* start the activity to open a file */
fiore@0: 						Intent intent = new Intent(CcmiEditorAppActivity.this, FileSelectorActivity.Open.class);
fiore@0: 						intent.putExtra("extension", CCMI_EXTENSION);
fiore@0: 						startActivityForResult(intent,OPEN_REQUEST);
fiore@0: 						dialogFragment.dismiss();
fiore@0: 					}else if("SAVE".equals(v.getTag())){
fiore@1: 						ILogger.logButton("save");
fiore@0: 						Intent intent = new Intent(CcmiEditorAppActivity.this, FileSelectorActivity.Save.class);
fiore@0: 						intent.putExtra("extension", CCMI_EXTENSION);
fiore@0: 						startActivityForResult(intent,SAVE_REQUEST);
fiore@0: 						dialogFragment.dismiss();
fiore@0: 					}
fiore@0: 				}
fiore@0: 			});
fiore@0: 		}
fiore@0: 	}
fiore@0: 	
fiore@0: 	@Override
fiore@0: 	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
fiore@0: 		if(resultCode == RESULT_OK){
fiore@0: 			if(requestCode == OPEN_REQUEST){			
fiore@0: 				try {
fiore@0: 					InputStream in = new FileInputStream(new File(data.getData().getPath()));
fiore@0: 					readXML(in);
fiore@1: 					ILogger.logActivity(navigation.getCurrentPath());
fiore@0: 				} catch (Exception e) {
fiore@0: 					accessibilityService.playSound(SoundEvent.V_ERROR);
fiore@0: 					accessibilityService.speak("File could not be open");
fiore@0: 				} 
fiore@0: 			}else if(requestCode == SAVE_REQUEST){
fiore@0: 				try {
fiore@0: 					String filePath = data.getData().getPath();
fiore@0: 					String diagramName = data.getData().getLastPathSegment();
fiore@0: 					/* make sure the extension is .ccmi */
fiore@0: 					if(!filePath.endsWith(CCMI_EXTENSION)||(CCMI_EXTENSION.equals(diagramName)))
fiore@0: 						filePath += CCMI_EXTENSION;
fiore@0: 					
fiore@0: 					/* make sure diagram name doesn't have trailing .ccmi, unless the name is just ".ccmi" */
fiore@0: 					if(diagramName.endsWith(CCMI_EXTENSION) && !(CCMI_EXTENSION.equals(diagramName))){
fiore@0: 						diagramName = diagramName.substring(0, diagramName.length()-CCMI_EXTENSION.length());
fiore@0: 					}
fiore@0: 					
fiore@0: 					diagram.setName(diagramName);
fiore@0: 					OutputStream out = new FileOutputStream(new File(filePath));
fiore@0: 					saveXML(out);
fiore@0: 				} catch (Exception e) {
fiore@0: 					accessibilityService.playSound(SoundEvent.V_ERROR);
fiore@0: 					accessibilityService.speak("File could not be saved");
fiore@0: 				}
fiore@0: 			}
fiore@0: 		}
fiore@0: 	}
fiore@0: 
fiore@0: 	private void saveXML(OutputStream out) throws Exception  {
fiore@0: 		Serializer serializer = new Persister();
fiore@0: 		serializer.write(diagram, out);
fiore@0: 		out.close();
fiore@0: 		navigation = new TreeNavigation(diagram,dialogBuilder,this);
fiore@0: 		update();
fiore@0: 		accessibilityService.playSound(SoundEvent.V_OK);
fiore@0: 		accessibilityService.speak("Filed saved");				
fiore@0: 	}
fiore@0: 	
fiore@0: 	private void readXML(InputStream in) throws Exception {
fiore@0: 		Serializer serializer = new Persister();
fiore@0: 		diagram = serializer.read(Diagram.class, in);
fiore@0: 		in.close();
fiore@0: 		navigation = new TreeNavigation(diagram,dialogBuilder,this);
fiore@0: 		update();
fiore@0: 	}
fiore@0: }
fiore@0: