/* Copyright (C) 1995, Russell Lang.  All rights reserved.
  
  This file is part of Aladdin Ghostscript.
  
  Aladdin Ghostscript is distributed with NO WARRANTY OF ANY KIND.  No author
  or distributor accepts any responsibility for the consequences of using it,
  or for whether it serves any particular purpose or works at all, unless he
  or she says so in writing.  Refer to the Aladdin Ghostscript Free Public
  License (the "License") for full details.
  
  Every copy of Aladdin Ghostscript must include a copy of the License,
  normally in a plain ASCII text file named PUBLIC.  The License grants you
  the right to copy, modify and redistribute Aladdin Ghostscript, but only
  under certain conditions described in the License.  Among other things, the
  License requires that the copyright notice and this notice be preserved on
  all copies.
*/

/* gs16spl.c */
/* 16-bit access to print spooler from Win32s */
/* by Russell Lang */
/* 1995-11-23 */

/* 
 * Ghostscript produces printer specific output
 * which must be given to the print spooler.
 * Under Win16, the APIs OpenJob, WriteSpool etc. are used
 * Under Win32 and Windows 95/NT, the APIs OpenPrinter, WritePrinter etc.  
 * are used.
 * Under Win32s, the 16-bit spooler APIs are not available, and the
 * 32-bit spooler APIs are not implemented.
 * This purpose of this application is to provide a means for the Win32s
 * version of Ghostscript to send output to the 16-bit spooler.
 */

/*
 * Usage:  gs16spl port filename
 *
 * filename will be sent to the spooler port.
 */


#define STRICT
#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define ID_TEXT 100

/* documented in Device Driver Adaptation Guide */
/* Prototypes taken from print.h */
DECLARE_HANDLE(HPJOB);

HPJOB   WINAPI OpenJob(LPSTR, LPSTR, HPJOB);
int     WINAPI StartSpoolPage(HPJOB);
int     WINAPI EndSpoolPage(HPJOB);
int     WINAPI WriteSpool(HPJOB, LPSTR, int);
int     WINAPI CloseJob(HPJOB);
int     WINAPI DeleteJob(HPJOB, int);
int     WINAPI WriteDialog(HPJOB, LPSTR, int);
int     WINAPI DeleteSpoolPage(HPJOB);

#define MAXSTR 256
#define PRINT_BUF_SIZE 16384

HPJOB hJob;
HWND hwndspl;
DLGPROC lpfnSpoolProc;
HINSTANCE phInstance;
char port[MAXSTR];
char filename[MAXSTR];
char error_message[MAXSTR];
int error;

char szAppName[] = "GS Win32s/Win16 spooler";

/* returns TRUE on success, FALSE on failure */
int
spoolfile(char *portname, char *filename)
{
FILE *f;
char *buffer;
char pcdone[64];
long ldone;
long lsize;
int count;
MSG msg;
	if ( (*portname == '\0') || (*filename == '\0') ) {
	    strcpy(error_message, "Usage: gs16spl port filename");
	    return FALSE;
	}

	if ((buffer = malloc(PRINT_BUF_SIZE)) == (char *)NULL)
	    return FALSE;

	if ((f = fopen(filename, "rb")) == (FILE *)NULL) {
	    sprintf(error_message, "Can't open %s", filename);
	    free(buffer);
	    return FALSE;
	}
	fseek(f, 0L, SEEK_END);
	lsize = ftell(f);
	if (lsize <= 0)
	    lsize = 1;
	fseek(f, 0L, SEEK_SET);
	ldone = 0;

	hJob = OpenJob(portname, filename, (HDC)NULL);
	switch ((int)hJob) {
	    case SP_APPABORT:
	    case SP_ERROR:
	    case SP_OUTOFDISK:
	    case SP_OUTOFMEMORY:
	    case SP_USERABORT:
		fclose(f);
		free(buffer);
		return FALSE;
	}
	if (StartSpoolPage(hJob) < 0)
	    error = TRUE;

	while (!error 
	  && (count = fread(buffer, 1, PRINT_BUF_SIZE, f)) != 0 ) {
	    if (WriteSpool(hJob, buffer, count) < 0)
		error = TRUE;
	    ldone += count;
	    sprintf(pcdone, "%d%% written to %s", (int)(ldone * 100 / lsize), portname);
	    SetWindowText(GetDlgItem(hwndspl, ID_TEXT), pcdone);
	    while (PeekMessage(&msg, 0, 0, 0, PM_REMOVE)) {
		TranslateMessage(&msg);
		DispatchMessage(&msg);
  	    }
  	}
	free(buffer);
	fclose(f);

	EndSpoolPage(hJob);
	if (error)
	    DeleteJob(hJob, 0);
	else
	    CloseJob(hJob);
	return !error;
}


/* Modeless dialog box - main window */
BOOL CALLBACK _export
SpoolDlgProc(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
    switch(message) {
	case WM_INITDIALOG:
	    SetWindowText(hDlg, szAppName);
	    return TRUE;
	case WM_COMMAND:
	    switch(LOWORD(wParam)) {
		case IDCANCEL:
		    error = TRUE;
		    DestroyWindow(hDlg);
		    EndDialog(hDlg, 0);
		    PostQuitMessage(0);
		    return TRUE;
	    }
    }
    return FALSE;
}


void
init_window(LPSTR cmdline)
{
    LPSTR s;
    char *d;
    s = cmdline;
    /* skip leading spaces */
    while (*s && *s==' ')
	s++;
    /* copy port name */
    d = port;
    while (*s && *s!=' ')
	*d++ = *s++;
    *d='\0';
    /* skip spaces */
    while (*s && *s==' ')
	s++;
    /* copy port name */
    d = filename;
    while (*s && *s!=' ')
	*d++ = *s++;
    *d='\0';

    lpfnSpoolProc = (DLGPROC)MakeProcInstance((FARPROC)SpoolDlgProc, phInstance);
    hwndspl = CreateDialog(phInstance, "SpoolDlgBox", HWND_DESKTOP, lpfnSpoolProc);

    return;
}

int PASCAL 
WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpszCmdLine, int cmdShow)
{
	MSG msg;
	phInstance = hInstance;
	
	init_window(lpszCmdLine);
	ShowWindow(hwndspl, cmdShow);

	if (!spoolfile(port, filename)) {
	    /* wait, showing error message */
	    SetWindowText(GetDlgItem(hwndspl, ID_TEXT), error_message);
	    while (GetMessage(&msg, (HWND)NULL, 0, 0)) {
		    TranslateMessage(&msg);
		    DispatchMessage(&msg);
	    }
	}

	DestroyWindow(hwndspl);
	FreeProcInstance((FARPROC)lpfnSpoolProc);
	return 0;
}