package com.qoppa;

import java.util.Vector;

import com.qoppa.android.pdf.Bookmark;
import com.qoppa.android.pdf.PDFException;
import com.qoppa.android.pdfProcess.PDFDocument;
import com.qoppa.android.pdfViewer.actions.Action;
import com.qoppa.android.pdfViewer.actions.GotoPageAction;
import com.qoppa.notes.QPDFNotesView;
import com.qoppa.viewer.listeners.DocumentListener;

import android.app.Activity;
import android.os.Bundle;


public class GotoFirstSample extends Activity 
{
	public QPDFNotesView notes;
	
	protected void onCreate(Bundle bundle)
	{
		super.onCreate(bundle);
		
		notes = new QPDFNotesView(this);
		notes.setActivity(this);
		
		// listen for when a document is opened
		notes.addDocumentListener(new DocumentListener(){

			@Override
			public void documentOpened()
			{
				goToFirstBookmark();
			}

			@Override
			public void documentSaved(String previousPath){}

			@Override
			public void zoomChanged(float zoom){}
			
		});
		
		setContentView(notes);
		
	}
	
	private void goToFirstBookmark()
	{
		PDFDocument doc = notes.getDocument();
		if (doc != null)
		{
			try
			{
				// loop through the bookmarks
				Bookmark root = doc.getRootBookmark();
				
				GotoPageAction action = findGotoPageAction(root);
				if (action != null)
				{
					notes.handleAction(action);
				}
			}
			catch (PDFException e)
			{
				e.printStackTrace();
			}
			
		}		
		
	}

	// Find the first GotoPageAction in the Bookmark's children
	private GotoPageAction findGotoPageAction(Bookmark parent)
	{
		if (parent == null)
		{
			return null;
		}
		
		// Look for a GotoPageAction in each child bookmark
		Vector<Bookmark> children = parent.getChildren();
		if (children != null)
		{
			// loop through the child bookmarks
			for (Bookmark child : children)
			{
				// look through the bookmark's actions
				Vector<Action> actions = child.getActions();
				if (actions != null)
				{
					for (Action action : actions)
					{
						if (action instanceof GotoPageAction)
						{
							return (GotoPageAction) action;
						}
					}
				}
				
				// Not found in this bookmark's actions, so look though it's child bookmarks
				GotoPageAction action = findGotoPageAction(child);
				if (action != null)
				{
					return action;
				}
			}
		}
		return null;
	}
	
}