haiku/headers/libs/print/libprint/PrintJobReader.h

/*

PrintJobReader

Copyright (c) 2002 Haiku.

Author:
	Michael Pfeiffer

Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
of the Software, and to permit persons to whom the Software is furnished to do
so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

*/

#ifndef _PRINT_JOB_READER_H
#define _PRINT_JOB_READER_H

#include <File.h>
#include <Message.h>
#include <Picture.h>

class PrintJobPage {
public:
					PrintJobPage();
					PrintJobPage(const PrintJobPage& copy);
					PrintJobPage(BFile* jobFile, off_t start);

	status_t		InitCheck() const;

	int32			NumberOfPictures() const { return fNumberOfPictures; }

	status_t		NextPicture(BPicture& picture, BPoint& p, BRect& r);

	PrintJobPage& operator=(const PrintJobPage& copy);

private:
	BFile		fJobFile;			// the job file
	off_t		fNextPicture;		// offset to first picture
	int32		fNumberOfPictures;	// of this page
	int32		fPicture;			// the picture returned by NextPicture()
	status_t	fStatus;
};


class PrintJobReader {
public:
					PrintJobReader(BFile* jobFile);
	virtual			~PrintJobReader();

			// test after construction if this is a valid job file
			status_t	InitCheck() const;

			// accessors to informations from job file
			int32		NumberOfPages() const { return fNumberOfPages; }
			int32		FirstPage() const;
			int32		LastPage() const;
			const BMessage*	JobSettings() const { return &fJobSettings; }
			BRect		PaperRect() const;
			BRect		PrintableRect() const;
			void		GetResolution(int32* xdpi, int32* ydpi) const;
			float		GetScale() const;

			// retrieve page
			status_t	GetPage(int32 no, PrintJobPage& pjp);

private:
			void		_BuildPageIndex();

	BFile		fJobFile;		// the job file
	int32		fNumberOfPages;	// the number of pages in the job file
	BMessage	fJobSettings;	// the settings extracted from the job file
	off_t*		fPageIndex;		// start positions of pages in the job file

};

#endif