/*
 * EX02WIN.C
 *
 *  C/Windows Example program for ArchiveLib 2.0
 *
 *  Copyright (c) Greenleaf Software, Inc. 1994 - 1996
 *  All Rights Reserved
 *
 * MEMBERS/FUNCTIONS DEMONSTRATED
 *
 *  ALArchiveAppendFromArchive()
 *  ALArchiveCreateFromArchive()
 *  ALArchiveReadDirectory()
 *  ALEntryListClearMarks()
 *  ALEntryListSetMarksFromDialog()
 *
 * DESCRIPTION
 *
 * EX02WIN demonstrates ALArchiveCreate() and ALArchiveAppend().
 * Both of these functions have overloaded versions so that you can use
 * an archive or a list of storage objects as your input.  In this case,
 * the input comes from an archive.  The program lets you select a list
 * of files from the input archive, and then gives you the choice of
 * either copying or appending to a new archive.
 *
 * This is a very simple Windows program.  It works by creating a modeless
 * dialog box, then wrapping a framing window around it.  By using a framing
 * window as the main window we are able to handle accelerator keys, menus,
 * and icons a bit easier. Because of this approach, WinMain() and
 * MainWndProc() are not very exciting, and have been moved down to the
 * bottom of the file.  MainWndProc() does handle menus and accelerator
 * keys, so it comes first.
 *
 *
 * REVISION HISTORY
 *
 *  February 1, 1996  2.0A  : Second release
 *
 */

#define STRICT
#include <windows.h>
#include <stdarg.h>

#include "al.h"
#include "algauge.h"
#include "ex02win.h"

int iInstanceNumber;
HINSTANCE hInstance;
HWND hDlgMain = 0;
hALArchive hArchive = 0;
void SizeFramingWindow( HWND hDlg );
void Copy( HWND hDlg, int append_flag );

/*
 * With a member function dedicated to filling list boxes,
 * displaying the contents of an archive in a list box becomes real easy.
 */

void ReadArchive( HWND hDlg, int archive_name, int list_box )
{
    char input_name[ 128 ];
    hALArchive arc;

    GetDlgItemText( hDlg, archive_name, input_name, 128 );
#if defined( ZIP )
    arc = newALPkArchive( input_name );
#else
    arc = newALGlArchive( input_name );
#endif
    if ( arc ) {
        ALArchiveFillListBox( arc, hDlg, list_box );
        deleteALArchive( arc );
    }
}

/*
 * To perform this function, I create a new list by reading the contents
 * of the input archive.  I then set the marks based on what the user
 * has set in the input list box.  The list is then ready to be passed
 * as a parameter to the Archive() or Create() command, and we are done.
 * After the command has been executed, we update the list box displays of
 * the contents of both archives.
 */

void Copy( HWND hDlg, int append_flag )
{
    char input_name[ 128 ];
    hALMonitor hMonitor;
    hALEntryList hList;
    int count;

    hMonitor = newALWindowsMessage( AL_MONITOR_JOB,
                                    GetDlgItem( hDlg, AL_PROGRESS_TEXT ),
                                    AL_SEND_RATIO,
                                    GetDlgItem( hDlg, AL_PROGRESS_BAR ),
                                    ALGaugeSetPosition );
    GetDlgItemText( hDlg, AL_INPUT, input_name, 128 );
#if defined( ZIP )
    hArchive = newALPkArchive( input_name );
    hList = newALListPkTools( hMonitor, AL_DEFAULT, AL_DEFAULT, AL_DEFAULT );
#else
    hArchive = newALGlArchive( input_name );
    hList = newALListGlTools( hMonitor, AL_DEFAULT );
#endif
    if ( hArchive && hList ) {
        char archive_name[ 128 ];
        hALArchive output_archive;
        ALArchiveReadDirectory( hArchive, hList );
        ALEntryListClearMarks( hList, 0 );

        count = ALEntryListSetMarksFromListBox( hList, hDlg, AL_INPUT_LIST );
        EditDisplay( hDlg,
                     AL_DEBUG,
                     "%d file%s selected\r\n",
                     count,
                     (LPSTR) (count == 1 ? " is" : "s are" ) );

        GetDlgItemText( hDlg, AL_OUTPUT, archive_name, 128 );
#if defined( ZIP )
        output_archive = newALPkArchive( archive_name );
#else
        output_archive = newALGlArchive( archive_name );
#endif
        if ( append_flag )
            ALArchiveAppendFromArchive( output_archive, hArchive, hList );
        else
            ALArchiveCreateFromArchive( output_archive, hArchive, hList );
        deleteALArchive( output_archive );
    }
    if ( hList )
        deleteALEntryList( hList );
    if ( hMonitor )
        deleteALMonitor( hMonitor );
    ReadArchive( hDlg, AL_INPUT, AL_INPUT_LIST );
    ReadArchive( hDlg, AL_OUTPUT, AL_OUTPUT_LIST );
}

/*
 * This is the window procedure for the dialog.  It handles all the commands
 * except accelerator keys and menu items, which get shipped to the
 * framing window.
 */

BOOL AL_EXPORT CALLBACK MainDialogProc( HWND hDlg,
                                        UINT message,
                                        WPARAM wParam,
                                        LPARAM lParam )
{
    char buf1[ 81 ];
    char buf2[ 81 ];

    AL_UNUSED_PARAMETER( lParam );

    switch ( message ) {
/*
 * When the dialog first gets created, we have to initialize the
 * title bar text, plus the contents of the text boxes that list the
 * name of the input archive and the output archive.
 */
        case WM_INITDIALOG :
            SizeFramingWindow( hDlg );
            wsprintf( buf1, "Windows Example 02 <instance %d>", iInstanceNumber );
            SetWindowText( GetParent( hDlg ), buf1 );
#if defined( ZIP )
            wsprintf( buf1, "WIN%02d.ZIP", iInstanceNumber );
            wsprintf( buf2, "OUT%02d.ZIP", iInstanceNumber );
#else
            wsprintf( buf1, "WIN%02d.GAL", iInstanceNumber );
            wsprintf( buf2, "OUT%02d.GAL", iInstanceNumber );
#endif
            SetDlgItemText( hDlg, AL_INPUT, buf1 );
            SetDlgItemText( hDlg, AL_OUTPUT, buf2 );
            return( TRUE );

/*
 * Most of the interesting things in the dialog happen when a WM_COMMAND
 * message is received.  These are usually in response to the press
 * of buttons in the dialog.
 */
        case WM_COMMAND :
            switch ( wParam ) {
/*
 * We get this when the user hits Return.  What we do depends on where
 * the focus is currently located.
 */
                case IDOK : /* User pressed enter */
                    if ( GetFocus() == GetDlgItem( hDlg, AL_INPUT ) )
                        ReadArchive( hDlg, AL_INPUT, AL_INPUT_LIST );
                    else if ( GetFocus() == GetDlgItem( hDlg, AL_OUTPUT ) )
                        ReadArchive( hDlg, AL_OUTPUT, AL_OUTPUT_LIST );
                    break;
/*
 * Read the input archive when this button gets clicked.
 */
                case AL_READ_INPUT :
                    ReadArchive( hDlg, AL_INPUT, AL_INPUT_LIST );
                    return TRUE;
/*
 * Read the output archive when this button gets clicked.
 */
                case AL_READ_OUTPUT :
                    ReadArchive( hDlg, AL_OUTPUT, AL_OUTPUT_LIST );
                    return TRUE;
/*
 * When I get a click on the copy button, I execute the Copy() procedure.
 * note that if a copy or append is already in progress, I figure that
 * out by the presence of the global variable pArchive. In that case,
 * just skip it.
 */
                case AL_COPY :
                    if ( !hArchive ) {
                        Copy( hDlg, 0 );
                        if ( hArchive ) {
                            deleteALArchive( hArchive );
                            hArchive = 0;
                        }
                    }
                    return TRUE;
/*
 * Almost identical to the Copy button.
 */
                case AL_APPEND :
                    if ( !hArchive ) {
                        Copy( hDlg, 1 );
                        if ( hArchive ) {
                            deleteALArchive( hArchive );
                            hArchive = 0;
                        }
                    }
                    return TRUE;
/*
 * If the user tries to quit  while a copy or append is in progress, I
 * do my best to create an error, and flash his window.  Since I'm not
 * sure if my error is going to take, I don't quit just yet.
 * If nothing is already in progress, I just do a normal quit.
 */
                case AL_EXIT :
                case WM_QUIT :
                case WM_DESTROY :
                    if ( hArchive ) {
                        hALStorage hFile = ALArchiveGetStorage( hArchive );
                        ALStorageSetError( hFile,
                                           AL_USER_ABORT,
                                           "User pressed abort key" );
                        FlashWindow( GetParent( hDlg ), 1 );
                        FlashWindow( GetParent( hDlg ), 0 );
                        return FALSE;
                    }
                    PostMessage( GetParent( hDlg ),WM_DESTROY, 0, 0 );
                    DestroyWindow( hDlgMain );
                    hDlgMain = 0;
                    return TRUE;

/*
 * To abort an operation in progress, I just set the error code for the
 * archive storage object.  This should cause it to abort next time it comes
 * up for air in the compression routine.
 */
                case AL_ABORT :
                    if ( hArchive ) {
                        hALStorage hFile = ALArchiveGetStorage( hArchive );
                        ALStorageSetError( hFile,
                                           AL_USER_ABORT,
                                           "User pressed abort key" );
                    }
                    return TRUE;
                default :
                    break;
            }
            break;
    }
    return FALSE;
}


/*
 * The about box is pretty much what you would expect.
 */

BOOL AL_EXPORT CALLBACK
AboutDialogProc( HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam )
{
    RECT rc;

    AL_UNUSED_PARAMETER( lParam );

    switch ( message ) {
        case WM_INITDIALOG :
            GetWindowRect( hDlg, &rc );
            SetWindowPos( hDlg,
                          0,
                          ((GetSystemMetrics(SM_CXSCREEN) - (rc.right - rc.left)) / 2),
                          ((GetSystemMetrics(SM_CYSCREEN) - (rc.bottom - rc.top)) / 2),
                          0, 0, SWP_NOSIZE | SWP_NOACTIVATE);
            break;
        case WM_COMMAND :
            switch ( wParam ) {
                case IDOK :
                case WM_QUIT :
                case WM_DESTROY :
                    EndDialog( hDlg, TRUE );
                    return TRUE;

            }
            break;
    }
    return FALSE;
}

/*
 * The main window is nothing more than a shell that exists to create
 * the dialog box, take menu commands, and process accelerator keys.
 */

LONG AL_EXPORT CALLBACK MainWndProc( HWND hWnd,
                                     UINT message,
                                     WPARAM wParam,
                                     LPARAM lParam )
{
    switch ( message ) {
        case WM_COMMAND:
            switch( wParam ) {
                case AL_GOTO_INPUT :
                    if ( hDlgMain)
                        SetFocus( GetDlgItem( hDlgMain, AL_INPUT ) );
                    break;
                case AL_GOTO_OUTPUT :
                    if ( hDlgMain)
                        SetFocus( GetDlgItem( hDlgMain, AL_OUTPUT ) );
                    break;
                case AL_ABOUT :
                    DialogBox( hInstance, "ALAboutDialog", 0, (DLGPROC) AboutDialogProc );
                    return TRUE;
                case AL_EXIT :
                    PostQuitMessage( 0 );
            }
            break;
        case WM_SETFOCUS:
            SetFocus( hDlgMain ); /* insure that the Dialog Box has the focus */
            break;
        case WM_DESTROY:
            PostQuitMessage( 0 );
            break;
    }
    return DefWindowProc( hWnd, message, wParam, lParam );
}

/*
 * WinMain calls the initialization routine for the progress gauge and
 * registers our class.  It then creates the dialog, and starts the
 * message pump.
 */

int PASCAL WinMain( HINSTANCE instance,
                    HINSTANCE previous_instance,
                    LPSTR cmd_line,
                    int nCmdShow )
{
    HWND hWnd;
    FARPROC lpfn;
    MSG msg;
    HACCEL hAccel;

    AL_UNUSED_PARAMETER( cmd_line );

    hInstance = instance;
    if ( !ALGaugeInit( instance, previous_instance ) )
        return (FALSE);
    if ( previous_instance == 0 ) {
        WNDCLASS wc;
        wc.style         = 0;
        wc.lpfnWndProc   = (WNDPROC) MainWndProc;
        wc.cbClsExtra    = 0;
        wc.cbWndExtra    = 0;
        wc.hInstance     = hInstance;
        wc.hIcon         = LoadIcon( hInstance, "ALIcon" );
        wc.hCursor       = LoadCursor(0,IDC_ARROW);
        wc.hbrBackground = (HBRUSH) GetStockObject( WHITE_BRUSH );
        wc.lpszMenuName  = "ALMenu";
        wc.lpszClassName = "ALClass";
        if ( !RegisterClass( &wc ) )
            return FALSE;
        iInstanceNumber = 0;
    }
#if !defined( AL_FLAT_MODEL )
    else {
        GetInstanceData( previous_instance,
                         (PBYTE) &iInstanceNumber,
                         sizeof iInstanceNumber );
        iInstanceNumber++;
    }
#endif
    hWnd = CreateWindow( "ALClass",
                         "ArchiveLib Example Program",
                         WS_OVERLAPPED | WS_CAPTION | WS_MINIMIZEBOX | WS_SYSMENU,
                         CW_USEDEFAULT,
                         0,
                         0,
                         0,
                         0,
                         0,
                         hInstance,
                         0);

    lpfn = MakeProcInstance( (FARPROC) MainDialogProc, hInstance );
    hDlgMain = CreateDialog( hInstance, "ALMainDialog", hWnd, (DLGPROC) lpfn );
    ShowWindow( hWnd, nCmdShow );
    ShowWindow( hDlgMain, SW_SHOW );
    hAccel = LoadAccelerators( hInstance, "ALAccelerator" );
    while ( GetMessage ( &msg, 0, 0, 0) ) {
        HWND hWndAccel = GetActiveWindow();
        if ( !( hWndAccel && TranslateAccelerator( hWndAccel, hAccel, &msg ) ) )
        {
            if ( hDlgMain == NULL || !IsDialogMessage( hDlgMain,&msg ) ) {
                TranslateMessage( &msg );
                DispatchMessage( &msg );
            }
        }
    }
    return msg.wParam;
}

/*
 * I need this routine for one purpose only.  After the dialog is loaded,
 * it calls this routine, which adjusts the size of the framing window to
 * fit exactly around the dialog box.  It also moves it to the center of
 * the screen.
 */

void SizeFramingWindow( HWND hDlg )
{
    RECT rect;
    int y;
    int x;

    GetWindowRect( hDlg, &rect );
    y = GetSystemMetrics( SM_CYSCREEN );
    y -= ( rect.bottom - rect.top );
    y -= GetSystemMetrics( SM_CYMENU ) + GetSystemMetrics( SM_CYCAPTION );
    y /= 2;
    x = GetSystemMetrics( SM_CXSCREEN );
    x -= rect.right - rect.left;
    x /= 2;
    SetWindowPos( GetParent( hDlg ), 0, x, y,
                  rect.right-rect.left,
                  rect.bottom-rect.top +
                  GetSystemMetrics( SM_CYMENU ) +
                  GetSystemMetrics( SM_CYCAPTION ),
                  SWP_NOZORDER );
}