bufferimage.java

j2me写的google地图

// Decompiled by DJ v3.7.7.81 Copyright 2004 Atanas Neshkov  Date: 2008-6-16 11:20:38
// Home Page : http://members.fortunecity.com/neshkov/dj.html  - Check often for new version!
// Decompiler options: packimports(3) 
// Source File Name:   BufferImage.java

package com.eightmotions.map;

import com.eightmotions.util.URLFetcher;
import com.eightmotions.util.UtilMidp;
import java.io.*;
import java.util.Enumeration;
import java.util.Vector;
import javax.microedition.io.ConnectionNotFoundException;
import javax.microedition.io.HttpConnection;
import javax.microedition.lcdui.*;
import javax.microedition.rms.*;

// Referenced classes of package com.eightmotions.map:
//            MapCustomOverlay, BufferImageListener, bufferImageLoaded

public class BufferImage
{
    class oneElemRms
    {

        int id;
        int size;

        oneElemRms()
        {
        }
    }


    public static void initBuffer()
    {
        if(!isInit)
        {
            m_cont = true;
            first = null;
            Thread t = new Thread(new Runnable() {

                public void run()
                {
                    try
                    {
                        Thread.sleep(2000L);
                    }
                    catch(InterruptedException ex)
                    {
                        ex.printStackTrace();
                    }
                    if(BufferImage.m_useRMS)
                        BufferImage.initRms();
                    while(BufferImage.m_cont) 
                        try
                        {
                            if(!BufferImage.checkBuffer())
                                Thread.sleep(1000L);
                            else
                                Thread.sleep(100L);
                        }
                        catch(Exception e)
                        {
                            e.printStackTrace();
                        }
                }

            });
            t.start();
            isInit = true;
        }
    }

    private static void exerciseRms()
    {
        try
        {
            RecordStore s = RecordStore.openRecordStore("t-temp", true);
            s.closeRecordStore();
            RecordStore.deleteRecordStore("t-temp");
        }
        catch(Exception ignored) { }
    }

    public static void provideDisplay(Display display, Displayable displayable)
    {
        m_display = display;
        m_displayable = displayable;
    }

    public static void stop()
    {
        m_cont = false;
    }

    protected static BufferImage getFirst()
    {
        return first;
    }

    protected static BufferImage pop()
    {
        if(UtilMidp.DEBUG)
            System.out.println("Pop");
        BufferImage res = first;
        if(first != null)
            first = first.next;
        res.next = null;
        count--;
        return res;
    }

    protected static void push(BufferImage inIma)
    {
        inIma.next = first;
        first = inIma;
        count++;
    }

    protected static boolean deleteLast()
    {
        if(UtilMidp.DEBUG)
            System.out.println("delete last");
        boolean res = false;
        BufferImage ima = removeLast();
        if(ima != null)
        {
            ima.delete();
            res = true;
        }
        return res;
    }

    protected static BufferImage removeLast()
    {
        if(UtilMidp.DEBUG)
            System.out.println("remove last");
        BufferImage ima = first;
        BufferImage prev = null;
        if(ima != null)
        {
            for(; ima.next != null; ima = ima.next)
                prev = ima;

            if(prev != null)
                prev.next = null;
            else
                first = null;
            count--;
        }
        return ima;
    }

    protected static void remove(BufferImage inIma)
    {
        if(UtilMidp.DEBUG)
            System.out.println("remove " + inIma);
        BufferImage current = first;
        if(first == inIma)
        {
            first = inIma.next;
            inIma.next = null;
            count--;
            return;
        }
        if(first != null)
            for(; current.next != null; current = current.next)
                if(current.next == inIma)
                {
                    current.next = inIma.next;
                    inIma.next = null;
                    count--;
                    return;
                }

    }

    public static void setBufferSize(int inSize)
    {
        if(UtilMidp.DEBUG)
            System.out.println("Set buffer size:" + inSize + " current:" + m_nbIma);
        while(count > inSize) 
            deleteLast();
        m_nbIma = inSize;
    }

    public static void setVisibleSize(int inSize)
    {
        if(m_useRMS)
            m_nbImaVis = inSize;
        else
            m_nbImaVis = m_nbIma;
    }

    public static void setImageListener(BufferImageListener inListen)
    {
        m_listener = inListen;
    }

    public static int getPending()
    {
        int pending = 0;
        for(BufferImage ima = first; ima != null; ima = ima.next)
            if(ima.state == 1)
                pending++;

        return pending;
    }

    protected BufferImage(int px, int py, int zoom, int typeSat, int inSize)
    {
        name = null;
        numSat = 0;
        buff = null;
        state = 0;
        rmsId = -1;
        my_data = null;
        next = null;
        debugString = null;
        String URL = "";
        this.px = px;
        this.py = py;
        this.zoom = zoom;
        numSat = typeSat;
        size = inSize;
        state = 1;
        offx = 0;
        offy = 0;
        try
        {
            String n = "/cache/" + getCacheName();
            if(UtilMidp.DEBUG)
                System.out.println("checking:" + n);
            Image image = Image.createImage(n);
            if(UtilMidp.DEBUG)
                System.out.println("OK----------");
            name = n;
            ima = image;
            return;
        }
        catch(Exception e)
        {
            debugString = "not in file, id:" + rmsId;
        }
        if(ima != null)
            return;
        if(sizeSq == inSize)
        {
            URL = getSatURL(px / sizeSq, py / sizeSq, zoom, typeSat);
            if(m_useProxy)
            {
                URL = "http://8motions.com/convert.php?in=jpg&out=png&url=" + UtilMidp.urlEncode(URL);
                if(extraInfo != null)
                    URL = URL + extraInfo;
            }
        } else
        {
            int inSqx = px % sizeSq;
            int inSqy = py % sizeSq;
            offx = (inSqx / inSize) * inSize;
            offy = (inSqy / inSize) * inSize;
            URL = getSatURL(px / sizeSq, py / sizeSq, zoom, typeSat);
            if(!m_modePacked)
                URL = "http://8motions.com/convert.php?in=" + (typeSat % 2 != 1 ? "png" : "jpg") + "&out=png&offx=" + offx + "&offy=" + offy + "&sizex=" + inSize + "&sizey=" + inSize + "&url=" + UtilMidp.urlEncode(URL);
            if(UtilMidp.DEBUG)
                System.out.println("URL:" + URL);
        }
        name = URL;
    }

    public String getCacheName()
    {
        return px / size + "-" + py / size + "-" + zoom + "-" + numSat + "-" + size;
    }

    public static String computeQuadrantString(int x, int y, int z, char tab[])
    {
        int ya = 1 << 17 - z;
        StringBuffer str = new StringBuffer();
        for(int i = 16; i >= z; i--)
        {
            ya /= 2;
            if(y < ya)
            {
                if(x < ya)
                {
                    str.append(tab[0]);
                } else
                {
                    str.append(tab[1]);
                    x -= ya;
                }
                continue;
            }
            if(x < ya)
            {
                str.append(tab[2]);
                y -= ya;
            } else
            {
                str.append(tab[3]);
                x -= ya;
                y -= ya;
            }
        }

        return str.toString();
    }

    protected String getSatURL(int x, int y, int z, int inNumSat)
    {
        String res = null;
        boolean isSat = false;
        if(inNumSat % 2 == 1)
            isSat = true;
        switch(numSat)
        {
        default:
            break;

        case 0: // '\0'
            res = "http://mt.google.com/mt?v=" + GOOGLE_MAP_VERSION + "&x=" + x + "&y=" + y + "&zoom=" + z;
            break;

        case 6: // '\006'
        case 7: // '\007'
            res = numSat == 6 ? "http://png.maps.yimg.com/png?v=3.1.0" : "http://aerial.maps.yimg.com/tile?v=1.4&t=a";
            res = res + "&x=" + x + "&y=" + (((1 << 17 - z) >> 1) - 1 - y) + "&z=" + (z + 1);
            break;

        case 4: // '\004'
        case 5: // '\005'
            int div = 1 << 17 - z;
            int cellX = x - div / 2;
            int cellY = y - div / 2;
            String type = "map/";
            if(isSat)
                type = "sat/";
            res = "http://tiles.ask.com/" + type + (z + 2) + "/" + cellX + "/" + cellY;
            break;

        case 8: // '\b'
        case 9: // '\t'
            if(m_customOverlay != null)
                res = m_customOverlay.getTileURL(x, y, z, sizeSq, inNumSat != 8);
            break;

        case 1: // '\001'
        case 2: // '\002'
        case 3: // '\003'
            int ya = 1 << 17 - z;
            if(y < 0 || ya - 1 < y)
                return "http://www.google.com/mapfiles/transparent.gif";
            if(x < 0 || ya - 1 < x)
            {
                x %= ya;
                if(x < 0)
                    x += ya;
            }
            StringBuffer str = new StringBuffer();
            char tab[];
            if(inNumSat == 1)
            {
                tab = tabIdxGoogle;
                str.append("http://kh.google.com/kh?v=" + GOOGLE_SAT_VERSION + "&t=t");
            } else
            {
                tab = tabIdxVearth;
                str.append("http://");
                if(inNumSat == 3)
                    str.append("h0");
                else
                    str.append("r0");
                str.append(".ortho.tiles.virtualearth.net/tiles/");
                if(inNumSat == 3)
                    str.append('h');
                else
                    str.append('r');
            }
            str.append(computeQuadrantString(x, y, z, tab));
            char num = str.charAt(str.length() - 1);
            if(inNumSat == 3)
                str.append(".jpg?g=1");
            else
            if(inNumSat == 2)
                str.append(".png?g=1");
            res = str.toString();
            break;
        }
        return res;
    }

    protected static String changeCar(String res)
    {
        StringBuffer tmp = new StringBuffer();
        for(int i = 0; i < res.length(); i++)
        {
            char c = res.charAt(i);
            if(c == '&')
                tmp.append("%26");
            else
                tmp.append(c);
        }

        return tmp.toString();
    }

    public static void cleanBuffer()
    {
        if(UtilMidp.DEBUG)
            System.out.println("SYNCHRO: clean buffer");
        for(BufferImage l = first; l != null; l = l.next)
        {
            if(l.state != 1 && l.state != 2)
                continue;
            if(l.rmsId != -1)
                l.state = 5;
            else
                l.state = 6;
        }

        if(UtilMidp.DEBUG)
            System.out.println("SYNCHRO: clean buffer done");
    }

    public static void deleteCache()
    {
        while(first != null) 
            deleteLast();
    }

    protected static int getNum(byte tab[], int offset, int length)
    {
        int res;
        int val;
        for(res = 0; length-- > 0; res = (res << 8) + val)
        {