// Copyright 2004 Adam Megacz, see the COPYING file for licensing [LGPL]
package org.xwt.plat;

import org.xwt.*;
import org.xwt.util.*;
import java.util.*;
import org.xwt.js.*;
import java.io.*;

/** Platform specific code for GCJ-compiled Win32 binaries */
public class Win32 extends GCJ {
    // Initialization ////////////////////////////////////////////////////////////////////////////

    // Win32 often asks for a DC/Handle when it doesn't really need one
    static int desktop_handle = 0;
    static int desktop_dc = 0;

    // Cursors
    static int wait_cursor = 0;
    static int default_cursor = 0;
    static int crosshair_cursor = 0;
    static int text_cursor = 0;
    static int move_cursor = 0;
    static int sizenesw_cursor = 0;
    static int sizens_cursor = 0;
    static int sizenwse_cursor = 0;
    static int sizewe_cursor = 0;
    static int hand_cursor = 0;
    
    /** reverse lookup from hwnd to Win32Surface */
    public static Hashtable hwndToWin32SurfaceMap = new Hashtable();

    /** lets us know that natInit() is finished */
    public static Semaphore messagePumpStarted = new Semaphore();

    /** ThreadId of the message pump thread, used to send it messages */
    public static int messagePumpThread = 0;

    public static native String getTempPath();
    public static native void natInit();
    public static native void natPreInit();

    protected native String _fileDialog(String suggestedFileName, boolean write);

    public Win32() { natPreInit(); }

    public void postInit() {
        new Thread() { public void run() { natInit(); } }.start();
        messagePumpStarted.block();
    }


    // Implementation of Platform methods /////////////////////////////////////////////////////////

    protected native String _getEnv(String key);
    protected boolean _needsAutoClick() { return true; }
    protected String getDescriptiveName() { return "GCJ Win32 Binary"; }
    protected Surface _createSurface(Box b, boolean framed) { return new Win32Surface(b, framed); }
    protected PixelBuffer _createPixelBuffer(int w, int h, Surface owner) { return new Win32PixelBuffer(w, h, (Win32Surface)owner); }
    protected Picture _createPicture(JS r) { return new Win32Picture(r); }
    protected native int _getScreenWidth();
    protected native int _getScreenHeight();
    protected boolean _supressDirtyOnResize() { return false; }
    protected native void _criticalAbort(String message);
    protected native String _getClipBoard();
    protected native void _setClipBoard(String s);
    protected boolean _isCaseSensitive() { return false; }

    private native void __detectProxy(String[] container);

    protected synchronized HTTP.Proxy _detectProxy() {

        String[] container = new String[] { null, null, null };
        if (Log.on) Log.info(this, "accessing Win32 registry");
        __detectProxy(container);
        if (container[2] == null && container[0] == null) {
            if (Log.on) Log.info(this, "no proxy settings in the Win32 registry");
            return null;
        }
        
        if (Log.on) Log.info(this, "PAC Script URL: " + container[2]);
        if (Log.on) Log.info(this, "Proxy Server String: " + container[0]);
        if (Log.on) Log.info(this, "Proxy Override String: " + container[1]);

        HTTP.Proxy ret = new HTTP.Proxy();
        if (container[2] != null) {
            ret.proxyAutoConfigFunction = HTTP.Proxy.getProxyAutoConfigFunction(container[2]);
            if (ret.proxyAutoConfigFunction != null) return ret;
        }

        if (container[0] == null) return null;
        StringTokenizer st = new StringTokenizer(container[0], ";", false);
        while(st.hasMoreTokens()) try {
            String s = st.nextToken().trim();
            String protocol, host;
            if (s.indexOf(':') == -1) {
                continue;
            } else if (s.indexOf("://") != -1) {
                protocol = s.substring(0, s.indexOf("://"));
                s = s.substring(s.indexOf("://") + 3);
                host = s.substring(0, s.indexOf(':'));
            } else if (s.indexOf('=') == -1) {
                protocol = "http";
                host = s.substring(0, s.indexOf(':'));
            } else {
                protocol = s.substring(0, s.indexOf('='));
                host = s.substring(s.indexOf('=') + 1, s.indexOf(':'));
            }
            int port = Integer.parseInt(s.substring(s.indexOf(':') + 1));
            if (protocol.equals("http")) {
                ret.httpProxyHost = host;
                ret.httpProxyPort = port;
            } else if (protocol.equals("https")) {
                ret.httpsProxyHost = host;
                ret.httpsProxyPort = port;
            } else if (protocol.equals("socks")) {
                ret.socksProxyHost = host;
                ret.socksProxyPort = port;
            }
        } catch (NumberFormatException nfe) { }

        if (container[1] != null) {
            st = new StringTokenizer(container[1], ";", false);
            ret.excluded = new String[st.countTokens()];
            for(int i=0; st.hasMoreTokens(); i++) ret.excluded[i] = st.nextToken();
        }
        return ret;
    }

    protected native boolean _newBrowserWindow_(String url);
    protected void _newBrowserWindow(String url) {
        if (!_newBrowserWindow_(url))
            if (Log.on) Log.info(this, "ShellExecuteEx() failed trying to open url " + url);
    }

    // Win32Surface ////////////////////////////////////////////////////////////////////////////

    public static class Win32Surface extends Surface.DoubleBufferedSurface {

        /** used to block while waiting for the message pump thread to create a hwnd for us */
        public Semaphore hwndCreated = new Semaphore();

        /** nothing more than a method version of WndProc, so we can access instance members/methods */
        public native int WndProc(int hwnd, int imsg, int wparam, int lparam);

        /** true iff the mouse is inside this window; used to determine if we should capture the mouse */
        boolean inside = false;

        /** true iff we have 'captured' the mouse with SetCapture() */
        boolean captured = false;

        public int hwnd = -1;
        public int hdc = 0;

        public int current_cursor = default_cursor;

        /** used to restore the cursor immediately before ReleaseCapture() */
        public int previous_cursor = 0;

        public native void natInit(boolean framed);
        public Win32Surface(Box b, final boolean framed) {
            super(b);
            natInit(framed);
            hwndToWin32SurfaceMap.put(new Integer(hwnd), this);
        }

        public void syncCursor() {
            if (cursor.equals("default")) current_cursor = default_cursor;
            else if (cursor.equals("wait")) current_cursor = wait_cursor;
            else if (cursor.equals("crosshair")) current_cursor = crosshair_cursor;
            else if (cursor.equals("text")) current_cursor = text_cursor;
            else if (cursor.equals("move")) current_cursor = move_cursor;
            else if (cursor.equals("hand")) current_cursor = hand_cursor;
            else if (cursor.equals("east") || cursor.equals("west")) current_cursor = sizewe_cursor;
            else if (cursor.equals("north") || cursor.equals("south")) current_cursor = sizens_cursor;
            else if (cursor.equals("northwest") || cursor.equals("southeast")) current_cursor = sizenwse_cursor;
            else if (cursor.equals("northeast") || cursor.equals("southwest")) current_cursor = sizenesw_cursor;
            postCursorChange();
        }

        public native void finalize();
        public native void postCursorChange();
        public native void toBack();
        public native void toFront();
        public native void _setMinimized(boolean m);
        public native void setInvisible(boolean i);
        public native void _setMaximized(boolean m);
        public native void _setSize(int w, int h);
        public native void setLocation();
        public native void setTitleBarText(String s);
        public native void setIcon(Picture p);
        public native void _dispose();
        public native void blit(PixelBuffer s, int sx, int sy, int dx, int dy, int dx2, int dy2);
    }


    // Win32Picture ////////////////////////////////////////////////////////////////////////////

    public static class Win32Picture extends Picture {

        /** the Win32 bitmap version of this Picture */
        int hbitmap = -1;

        /** dc of the bitmap */
        int hdc = -1;

        /** true iff this Picture has translucent regions */
        boolean hasalpha = false;

        /** true iff this Picture has transparent regions but no translucent regions */
        boolean hasmask = true;

        /** if hasmask, this mask indicates which regions are transparent */
        int hmask = -1;

        /** dc of the mask */
        int maskdc = -1;

        public Win32Picture(JS r) { super(r); }
        public int getWidth() { return width; };
        public int getHeight() { return height; };
        public int[] getData() { return data; }
        boolean initialized = false;
        public void init() { if (!initialized && isLoaded) natInit(); initialized = true; }
        public native void natInit();
    }
    

    // Win32PixelBuffer //////////////////////////////////////////////////////////////////////////

    public static class Win32PixelBuffer extends PixelBuffer {

        int w = 0;
        int h = 0;

        int clipx1 = 0;
        int clipy1 = 0;
        int clipx2 = 0;
        int clipy2 = 0;

        int hdc = -1;
        int hbitmap = -1;

        public int getHeight() { return h; }
        public int getWidth() { return w; }

        public native void natInit();
        public Win32PixelBuffer(int w, int h, Win32Surface owner) {
            this.w = w;
            this.h = h;
            clipx2 = w;
            clipy2 = h;
            natInit();
        }

        public native void fillRect(int x, int y, int x2, int y2, int color);
        public void drawPicture(Picture source, int dx, int dy, int cx1, int cy1, int cx2, int cy2) {
            ((Win32Picture)source).init();
            drawPicture(source, dx, dy, cx1, cy1, cx2, cy2, 0, false);
        }
        public void drawGlyph(org.xwt.Font.Glyph source, int dx, int dy, int cx1, int cy1, int cx2, int cy2, int rgb) {
            Win32Picture p = ((Win32Picture)((Platform.DefaultGlyph)source).getPicture());
            p.init();
            drawPicture(p, dx, dy, cx1, cy1, cx2, cy2, rgb, true);
        }
        public native void drawPicture(Picture source, int dx, int dy, int cx1, int cy1, int cx2, int cy2,
                                       int rgb, boolean alphaOnly);

        public native void finalize();

        // FIXME: try to use os acceleration
        public void fillTrapezoid(int x1, int x2, int y1, int x3, int x4, int y2, int argb) {
            if (x1 == x3 && x2 == x4) {
                fillRect(x1, y1, x4, y2, argb);
            } else for(int y=y1; y<y2; y++) {
                int _x1 = (int)Math.floor((y - y1) * (x3 - x1) / (y2 - y1) + x1);
                int _y1 = (int)Math.floor(y);
                int _x2 = (int)Math.ceil((y - y1) * (x4 - x2) / (y2 - y1) + x2);
                int _y2 = (int)Math.floor(y) + 1;
                if (_x1 > _x2) { int _x0 = _x1; _x1 = _x2; _x2 = _x0; }
                fillRect(_x1, _y1, _x2, _y2, argb);
            }
        }
    }

}