/*
 * tkMacOSXPrint.c --
 *
 *      This module implements native printing dialogs for macOS.
 *
 * Copyright © 2006 Apple Inc.
 * Copyright © 2011-2021 Kevin Walzer/WordTech Communications LLC.
 *
 * See the file "license.terms" for information on usage and redistribution of
 * this file, and for a DISCLAIMER OF ALL WARRANTIES.
 */

#include <tcl.h>
#include <tk.h>
#include <tkInt.h>
#include <Cocoa/Cocoa.h>
#include <CoreFoundation/CoreFoundation.h>
#include <CoreServices/CoreServices.h>
#include <ApplicationServices/ApplicationServices.h>
#include <tkMacOSXInt.h>
#include <sys/types.h>
#include <unistd.h>
#include <stdio.h>
#include <fcntl.h>

/* Forward declarations of functions and variables. */
NSString * fileName = nil;
CFStringRef urlFile = NULL;
int			StartPrint(ClientData clientData, Tcl_Interp * interp,
			    int objc, Tcl_Obj * const objv[]);
OSStatus		FinishPrint(NSString *file, int buttonValue);
int			MacPrint_Init(Tcl_Interp * interp);

/* Delegate class for print dialogs. */
@interface PrintDelegate: NSObject
    - (id) init;
    - (void) printPanelDidEnd: (NSPrintPanel *) printPanel
		   returnCode: (int) returnCode
		  contextInfo: (void *) contextInfo;
@end

@implementation PrintDelegate
- (id) init {
    self = [super init];
    return self;
}

- (void) printPanelDidEnd: (NSPrintPanel *) printPanel
	       returnCode: (int) returnCode
	      contextInfo: (void *) contextInfo {
    (void) printPanel;
    (void) contextInfo;

    /*
     * Pass returnCode to FinishPrint function to determine how to
     * handle.
     */

    FinishPrint(fileName, returnCode);
}
@end

/*
 *----------------------------------------------------------------------
 *
 * StartPrint --
 *
 * 	Launch native print dialog.
 *
 * Results:
 *	Configures values and starts print process.
 *
 *----------------------------------------------------------------------
 */

int
StartPrint(
    ClientData clientData,
    Tcl_Interp * interp,
    int objc,
    Tcl_Obj *const objv[])
{
    (void) clientData;
    NSPrintInfo * printInfo = [NSPrintInfo sharedPrintInfo];
    NSPrintPanel * printPanel = [NSPrintPanel printPanel];
    int accepted;
    PMPrintSession printSession;
    PMPageFormat pageFormat;
    PMPrintSettings printSettings;
    OSStatus status = noErr;

    /* Check for proper number of arguments. */
    if (objc < 2) {
        Tcl_WrongNumArgs(interp, 1, objv, "file");
        return TCL_ERROR;
    }

    fileName = [NSString stringWithUTF8String: Tcl_GetString(objv[1])];
    urlFile = (CFStringRef) fileName;
    CFRetain(urlFile);

    /* Initialize the delegate for the callback from the page panel. */
    PrintDelegate * printDelegate = [[PrintDelegate alloc] init];

    status = PMCreateSession( & printSession);
    if (status != noErr) {
        NSLog(@ "Error creating print session.");
        return TCL_ERROR;
    }

    status = PMCreatePrintSettings( & printSettings);
    if (status != noErr) {
        NSLog(@ "Error creating print settings.");
        return TCL_ERROR;
    }

    status = PMSessionDefaultPrintSettings(printSession, printSettings);
    if (status != noErr) {
        NSLog(@ "Error creating default print settings.");
        return TCL_ERROR;
    }

    printSession = (PMPrintSession)[printInfo PMPrintSession];
    pageFormat = (PMPageFormat)[printInfo PMPageFormat];
    printSettings = (PMPrintSettings)[printInfo PMPrintSettings];

    accepted = [printPanel runModalWithPrintInfo: printInfo];
    [printDelegate printPanelDidEnd: printPanel
			 returnCode: accepted
			contextInfo: printInfo];

    return TCL_OK;
}

/*
 *----------------------------------------------------------------------
 *
 * FinishPrint --
 *
 * 	Handles print process based on input from dialog.
 *
 * Results:
 *	Completes print process.
 *
 *----------------------------------------------------------------------
 */

OSStatus
FinishPrint(
    NSString *file,
    int buttonValue)
{
    NSPrintInfo * printInfo = [NSPrintInfo sharedPrintInfo];
    PMPrintSession printSession;
    PMPageFormat pageFormat;
    PMPrintSettings printSettings;
    OSStatus status = noErr;
    CFStringRef mimeType = NULL;

    /*
     * If value passed here is NSCancelButton, return noErr;
     * otherwise printing will occur regardless of value.
     */
    if (buttonValue == NSModalResponseCancel) {
        return noErr;
    }

    status = PMCreateSession( & printSession);
    if (status != noErr) {
        NSLog(@ "Error creating print session.");
        return status;
    }

    status = PMCreatePrintSettings( & printSettings);
    if (status != noErr) {
        NSLog(@ "Error creating print settings.");
        return status;
    }

    status = PMSessionDefaultPrintSettings(printSession, printSettings);
    if (status != noErr) {
        NSLog(@ "Error creating default print settings.");
        return status;
    }

    printSession = (PMPrintSession)[printInfo PMPrintSession];
    pageFormat = (PMPageFormat)[printInfo PMPageFormat];
    printSettings = (PMPrintSettings)[printInfo PMPrintSettings];

    /*Handle print operation.*/
    if (buttonValue == NSModalResponseOK) {

        if (urlFile == NULL) {
            NSLog(@ "Could not get file to print.");
            return noErr;
        }

        fileName = file;

        CFURLRef printURL = CFURLCreateWithFileSystemPath(kCFAllocatorDefault, urlFile, kCFURLPOSIXPathStyle, false);

        PMPrinter currentPrinter;
        PMDestinationType printDestination;

        /*Get the intended destination.*/
        status = PMSessionGetDestinationType(printSession, printSettings, & printDestination);

        /*Destination is printer. Send file to printer.*/
        if (status == noErr && printDestination == kPMDestinationPrinter) {

            status = PMSessionGetCurrentPrinter(printSession, & currentPrinter);
            if (status == noErr) {
                CFArrayRef mimeTypes;
                status = PMPrinterGetMimeTypes(currentPrinter, printSettings, & mimeTypes);
                if (status == noErr && mimeTypes != NULL) {
                    mimeType = CFSTR("application/pdf");
                    if (CFArrayContainsValue(mimeTypes, CFRangeMake(0, CFArrayGetCount(mimeTypes)), mimeType)) {
                        status = PMPrinterPrintWithFile(currentPrinter, printSettings, pageFormat, mimeType, printURL);
                        CFRelease(urlFile);
                        return status;
                    }
                }
            }
        }

        /* Destination is file. Determine how to handle. */
        if (status == noErr && printDestination == kPMDestinationFile) {
            CFURLRef outputLocation = NULL;

            status = PMSessionCopyDestinationLocation(printSession, printSettings, & outputLocation);
            if (status == noErr) {
                /*Get the source file and target destination, convert to strings.*/
                CFStringRef sourceFile = CFURLCopyFileSystemPath(printURL, kCFURLPOSIXPathStyle);
                CFStringRef savePath = CFURLCopyFileSystemPath(outputLocation, kCFURLPOSIXPathStyle);
                NSString * sourcePath = (NSString * ) sourceFile;
                NSString * finalPath = (NSString * ) savePath;
                NSString * pathExtension = [finalPath pathExtension];
                NSFileManager * fileManager = [NSFileManager defaultManager];
		NSError * error = nil;

                /*
		 * Is the target file a PDF? If so, copy print file
		 * to output location.
		 */
                if ([pathExtension isEqualToString: @ "pdf"]) {

		    /*Make sure no file conflict exists.*/
		    if ([fileManager fileExistsAtPath: finalPath]) {
			[fileManager removeItemAtPath: finalPath error: &error];
		    }
                    if ([fileManager fileExistsAtPath: sourcePath]) {
                        error = nil;
                        [fileManager copyItemAtPath: sourcePath toPath: finalPath error: & error];
                    }
		    return status;
                }

                /*
                 * Is the target file PostScript? If so, run print file
                 * through CUPS filter to convert back to PostScript.
                 */

              if ([pathExtension isEqualToString: @ "ps"]) {
                    char source[5012];
                    char target[5012];
                    [sourcePath getCString: source maxLength: (sizeof source) encoding: NSUTF8StringEncoding];
                    [finalPath getCString: target maxLength: (sizeof target) encoding: NSUTF8StringEncoding];
		    /*Make sure no file conflict exists.*/
		    if ([fileManager fileExistsAtPath: finalPath]) {
			[fileManager removeItemAtPath: finalPath error: &error];
		    }

		    /*
		     *  Fork and start new process with command string. Thanks to Peter da Silva
		     *  for assistance.
		     */
  		    pid_t pid;
		    if ((pid = fork()) == -1) {
		      return -1;
		    } else if (pid == 0) {
		      /* Redirect output to file and silence debugging output.*/
		      dup2(open(target, O_RDWR | O_CREAT, 0777), 1);
		      dup2(open("/dev/null", O_WRONLY), 2);
		      execl("/usr/sbin/cupsfilter", "/usr/sbin/cupsfilter", "-m", "application/postscript", source, NULL);
		      exit(0);
		    }
	      return status;
	      }
	    }
	}

        /* Destination is preview. Open file in default application for PDF. */
        if ((status == noErr) && (printDestination == kPMDestinationPreview)) {
            CFStringRef urlpath = CFURLCopyFileSystemPath(printURL, kCFURLPOSIXPathStyle);
            NSString * path = (NSString * ) urlpath;
            NSURL * url = [NSURL fileURLWithPath: path];
            NSWorkspace * ws = [NSWorkspace sharedWorkspace];
            [ws openURL: url];
            status = noErr;
            return status;
        }

        /*
         * If destination is not printer, file or preview,
         * we do not support it. Display alert.
         */

	if (((status == noErr) && (printDestination != kPMDestinationPreview)) || ((status == noErr) && (printDestination != kPMDestinationFile)) || ((status == noErr) &&  (printDestination != kPMDestinationPrinter))) {

            NSAlert * alert = [[[NSAlert alloc] init] autorelease];
            [alert addButtonWithTitle: @ "OK"];

            [alert setMessageText: @ "Unsupported Printing Operation"];
            [alert setInformativeText: @ "This printing operation is not supported."];
            [alert setAlertStyle: NSAlertStyleInformational];
            [alert runModal];
            return status;
        }
    }

    /* Return because cancel button was clicked. */
    if (buttonValue == NSModalResponseCancel) {
        PMRelease(printSession);
        return status;
    }

    return status;
}

/*
 *----------------------------------------------------------------------
 *
 * MacPrint_Init--
 *
 * 	Initializes the printing module.
 *
 * Results:
 *	Printing module initialized.
 *
 *----------------------------------------------------------------------
 */

int MacPrint_Init(Tcl_Interp * interp) {
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
    Tcl_CreateObjCommand(interp, "::tk::print::_print", StartPrint, (ClientData) NULL, (Tcl_CmdDeleteProc * ) NULL);
    [pool release];
    return TCL_OK;
}

/*
 * Local Variables:
 * mode: objc
 * c-basic-offset: 4
 * fill-column: 79
 * coding: utf-8
 * End:
 */