* Added application print_server_add_on that is used

by the print_server to run a printer driver add-on.
  This makes the print_server
  1) resistant to add-on crashes
  2) and memory leaks in add-ons
  3) license of an add-on cannot influence the
     license of the print_server since it does not
     directly load the add-on anymore; might be
     an issue with GPL printer drivers like Gutenprint
 
  Transport add-ons directly loaded by the print_server
  should be moved outside the print_server too.
  Right now I am not aware that the transport add-ons
  in the repository have any of the issues.
  The Gutenprint driver has 2 + 3 that was the main
  motivation to implement that now. 

  Disabled for now until the launch issue is resolved.
  BRoster does not find the application by its
  signature until it is opened in Tracker once.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39346 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/print/PrintServerAddOn.h

@@ -0,0 +1,62 @@
+/*
+ * Copyright 2010 Haiku, Inc. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ *
+ * Authors:
+ *		Michael Pfeiffer
+ */
+#ifndef PRINT_SERVER_ADD_ON_H
+#define PRINT_SERVER_ADD_ON_H
+
+
+#include <Directory.h>
+#include <Entry.h>
+#include <Message.h>
+#include <Messenger.h>
+#include <Path.h>
+#include <String.h>
+#include <SupportDefs.h>
+
+
+class PrintServerAddOn
+{
+public:
+						PrintServerAddOn(const char* driver);
+	virtual				~PrintServerAddOn();
+
+			status_t	AddPrinter(const char* spoolFolderName);
+			status_t	ConfigPage(BDirectory* spoolFolder,
+							BMessage* settings);
+			status_t	ConfigJob(BDirectory* spoolFolder,
+							BMessage* settings);
+			status_t	DefaultSettings(BDirectory* spoolFolder,
+							BMessage* settings);
+			status_t	TakeJob(const char* spoolFile,
+							BDirectory* spoolFolder);
+
+	static	status_t	FindPathToDriver(const char* driver, BPath* path);
+
+private:
+			const char*	Driver() const;
+
+			status_t	Launch(BMessenger& messenger);
+			bool		IsLaunched();
+			void		Quit();
+
+			void		AddDirectory(BMessage& message, const char* name,
+							BDirectory* directory);
+			void		AddEntryRef(BMessage& message, const char* name,
+							const entry_ref* entryRef);
+			status_t	SendRequest(BMessage& request, BMessage& reply);
+			status_t	GetResult(BMessage& reply);
+			status_t	GetResultAndUpdateSettings(BMessage& reply,
+							BMessage* settings);
+
+	BString		fDriver;
+	status_t	fLaunchStatus;
+	BMessenger	fMessenger;
+};
+
+
+
+#endif

headers/private/print/PrintServerAddOnProtocol.h

@@ -0,0 +1,65 @@
+/*
+ * Copyright 2010 Haiku, Inc. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ *
+ * Authors:
+ *		Michael Pfeiffer
+ */
+#ifndef PRINT_SERVER_ADD_ON_PROTOCOL_H
+#define PRINT_SERVER_ADD_ON_PROTOCOL_H
+
+extern const char* kPrintServerAddOnApplicationSignature;
+
+extern const char* kPrintServerAddOnStatusAttribute;
+extern const char* kPrinterDriverAttribute;
+extern const char* kPrinterNameAttribute;
+extern const char* kPrinterFolderAttribute;
+extern const char* kPrintJobFileAttribute;
+extern const char* kPrintSettingsAttribute;
+
+enum {
+	// message constants for the five corresponding
+	// printer driver add-on hook functions
+	kMessageAddPrinter = 'PSad',
+		// Request:
+		// 		BString kPrinterDriverAttribute
+		// 		BString kPrinterNameAttribute
+		// Reply:
+		// 		int32 kPrintServerAddOnStatusAttribute
+
+	kMessageConfigPage = 'PScp',
+		// Request:
+		// 		BString kPrinterDriverAttribute
+		// 		BString kPrinterFolderAttribute
+		// 		BMessage kPrintSettingsAttribute
+		// Reply:
+		// 		int32 kPrintServerAddOnStatusAttribute
+		// 		BMessage kPrintSettingsAttribute (if status is B_OK)
+
+	kMessageConfigJob = 'PScj',
+		// Request:
+		// 		BString kPrinterDriverAttribute
+		// 		BString kPrinterFolderAttribute
+		// 		BMessage kPrintSettingsAttribute
+		// Reply:
+		// 		int32 kPrintServerAddOnStatusAttribute
+		// 		BMessage kPrintSettingsAttribute (if status is B_OK)
+
+	kMessageDefaultSettings = 'PSds',
+		// Request:
+		// 		BString kPrinterDriverAttribute
+		// 		BString kPrinterFolderAttribute
+		// Reply:
+		// 		int32 kPrintServerAddOnStatusAttribute
+		// 		BMessage kPrintSettingsAttribute (if status is B_OK)
+
+	kMessageTakeJob = 'PStj',
+		// Request:
+		// 		BString kPrinterDriverAttribute
+		// 		BString kPrintJobFileAttribute
+		// 		BString kPrinterFolderAttribute
+		// Reply:
+		// 		int32 kPrintServerAddOnStatusAttribute
+};
+
+#endif

headers/private/print/PrinterDriverAddOn.h

@@ -0,0 +1,47 @@
+/*
+ * Copyright 2001-2010, Haiku, Inc. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ *
+ * Authors:
+ *		Ithamar R. Adema
+ *		Michael Pfeiffer
+ */
+#ifndef PRINTER_DRIVER_ADD_ON_H
+#define PRINTER_DRIVER_ADD_ON_H
+
+
+#include <Directory.h>
+#include <image.h>
+#include <Message.h>
+#include <Path.h>
+#include <SupportDefs.h>
+
+
+class PrinterDriverAddOn
+{
+public:
+						PrinterDriverAddOn(const char* driver);
+						~PrinterDriverAddOn();
+
+			status_t	AddPrinter(const char* spoolFolderName);
+			status_t	ConfigPage(BDirectory* spoolFolder,
+							BMessage* settings);
+			status_t	ConfigJob(BDirectory* spoolFolder,
+							BMessage* settings);
+			status_t	DefaultSettings(BDirectory* spoolFolder,
+							BMessage* settings);
+			status_t	TakeJob(const char* spoolFile,
+							BDirectory* spoolFolder);
+
+	static	status_t	FindPathToDriver(const char* driver, BPath* path);
+
+private:
+			bool		IsLoaded() const;
+			status_t	CopyValidSettings(BMessage* settings,
+							BMessage* newSettings);
+
+	image_id	fAddOnID;
+};
+
+
+#endif