haiku/headers/os/locale/Catalog.h

/*
 * Copyright 2003-2012, Haiku, Inc.
 * Distributed under the terms of the MIT License.
 */
#ifndef _CATALOG_H_
#define _CATALOG_H_


#include <LocaleRoster.h>
#include <Locker.h>
#include <SupportDefs.h>
#include <String.h>


class BCatalogData;
class BLocale;
class BMessage;
struct entry_ref;


class BCatalog {
public:
								BCatalog();
								BCatalog(const entry_ref& catalogOwner,
									const char* language = NULL,
									uint32 fingerprint = 0);
	virtual						~BCatalog();

			const char*			GetString(const char* string,
									const char* context = NULL,
									const char* comment = NULL);
			const char*			GetString(uint32 id);

			status_t			GetData(const char* name, BMessage* msg);
			status_t			GetData(uint32 id, BMessage* msg);

			status_t			GetSignature(BString* signature);
			status_t			GetLanguage(BString* language);
			status_t			GetFingerprint(uint32* fingerprint);

			status_t			SetTo(const entry_ref& catalogOwner,
									const char* language = NULL,
									uint32 fingerprint = 0);

			status_t			InitCheck() const;
			int32				CountItems() const;

protected:
								BCatalog(const BCatalog&);
			const BCatalog&		operator= (const BCatalog&);
									// hide assignment and copy-constructor

			BCatalogData*		fCatalogData;
	mutable	BLocker				fLock;

private:
	friend	class BLocale;
	friend	status_t			get_add_on_catalog(BCatalog*, const char*);
};


#undef B_TRANSLATION_SYSTEM_NAME_CONTEXT
#define B_TRANSLATION_SYSTEM_NAME_CONTEXT "System name"


#ifndef B_AVOID_TRANSLATION_MACROS
// macros for easy catalog-access, define B_AVOID_TRANSLATION_MACROS if
// you don't want these (in which case you need to collect the catalog keys
// manually, as collectcatkeys won't do it for you):

#undef B_TRANSLATION_CONTEXT
	// In a single application, several strings (e.g. 'Ok') will be used
	// more than once, in different contexts.
	// As the application programmer can not know if all translations of
	// this string will be the same for all languages, each occurrence of
	// the string must be translated on its own.
	// Specifying the context explicitly with each string allows the person
	// translating a catalog to separate these different occurrences of the
	// same string and tell which strings appears in what context of the
	// application.
	// In order to give the translator a useful hint, the application
	// programmer needs to define B_TRANSLATION_CONTEXT with the context he'd
	// like to be associated with the strings used in this specifc source file.
	// example:
	//		#define B_TRANSLATION_CONTEXT "Folder-Window"
	// Tip: Use a descriptive name of the class implemented in that
	//		source-file.

#ifdef B_COLLECTING_CATKEYS

// pull in all the macros used when collecting catalog keys.
#include <tools/CollectingCatalog.h>

#else

// Translation macros which may be used to shorten translation requests:
#undef B_TRANSLATE
#define B_TRANSLATE(string) \
	BLocaleRoster::Default()->GetCatalog()->GetString((string), \
		B_TRANSLATION_CONTEXT)

#undef B_TRANSLATE_CONTEXT
#define B_TRANSLATE_CONTEXT(string, context) \
	BLocaleRoster::Default()->GetCatalog()->GetString((string), (context))

#undef B_TRANSLATE_COMMENT
#define B_TRANSLATE_COMMENT(string, comment) \
	BLocaleRoster::Default()->GetCatalog()->GetString((string), \
		B_TRANSLATION_CONTEXT, (comment))

#undef B_TRANSLATE_ALL
#define B_TRANSLATE_ALL(string, context, comment) \
	BLocaleRoster::Default()->GetCatalog()->GetString((string), (context), \
		(comment))

#undef B_TRANSLATE_ID
#define B_TRANSLATE_ID(id) \
	BLocaleRoster::Default()->GetCatalog()->GetString((id))

#undef B_TRANSLATE_SYSTEM_NAME
#define B_TRANSLATE_SYSTEM_NAME(string) \
	BLocaleRoster::Default()->IsFilesystemTranslationPreferred() \
		? BLocaleRoster::Default()->GetCatalog()->GetString((string), \
			B_TRANSLATION_SYSTEM_NAME_CONTEXT) \
		: (string)

// Translation markers which can be used to mark static strings/IDs which
// are used as key for translation requests (at other places in the code).
/* Example:
		#define B_TRANSLATION_CONTEXT "MyDecentApp-Menu"

		static const char* choices[] = {
			B_TRANSLATE_MARK("left"),
			B_TRANSLATE_MARK("right"),
			B_TRANSLATE_MARK("up"),
			B_TRANSLATE_MARK("down")
		};

		void MyClass::AddChoices(BMenu* menu)
		{
			for (char** ch = choices; *ch != '\0'; ++ch) {
				menu->AddItem(
					new BMenuItem(
						B_TRANSLATE(*ch),
						new BMessage(...)
					)
				);
			}
		}
*/
#undef B_TRANSLATE_MARK
#define B_TRANSLATE_MARK(string) (string)

#undef B_TRANSLATE_MARK_COMMENT
#define B_TRANSLATE_MARK_COMMENT(string, comment) (string)

#undef B_TRANSLATE_MARK_ALL
#define B_TRANSLATE_MARK_ALL(string, context, comment) (string)

#undef B_TRANSLATE_MARK_ID
#define B_TRANSLATE_MARK_ID(id) (id)

#undef B_TRANSLATE_MARK_SYSTEM_NAME
#define B_TRANSLATE_MARK_SYSTEM_NAME(string) (string)

// the same for void contexts:
#undef B_TRANSLATE_MARK_VOID
#define B_TRANSLATE_MARK_VOID(string)

#undef B_TRANSLATE_MARK_COMMENT_VOID
#define B_TRANSLATE_MARK_COMMENT_VOID(string, comment)

#undef B_TRANSLATE_MARK_ALL_VOID
#define B_TRANSLATE_MARK_ALL_VOID(string, context, comment)

#undef B_TRANSLATE_MARK_ID_VOID
#define B_TRANSLATE_MARK_ID_VOID(id)

#undef B_TRANSLATE_MARK_SYSTEM_NAME_VOID
#define B_TRANSLATE_MARK_SYSTEM_NAME_VOID(string)

// Translation macros which cause collectcatkeys to ignore this key
// (useful in combination with the marking macros above):
#undef B_TRANSLATE_NOCOLLECT
#define B_TRANSLATE_NOCOLLECT(string) \
	B_TRANSLATE(string)

#undef B_TRANSLATE_NOCOLLECT_COMMENT
#define B_TRANSLATE_NOCOLLECT_COMMENT(string, comment) \
	B_TRANSLATE_COMMENT(string, comment)

#undef B_TRANSLATE_NOCOLLECT_ALL
#define B_TRANSLATE_NOCOLLECT_ALL(string, context, comment) \
	B_TRANSLATE_ALL(string, context, comment)

#undef B_TRANSLATE_NOCOLLECT_ID
#define B_TRANSLATE_NOCOLLECT_ID(id) \
	B_TRANSLATE_ID(id)

#undef B_TRANSLATE_NOCOLLECT_SYSTEM_NAME
#define B_TRANSLATE_NOCOLLECT_SYSTEM_NAME(string) \
	B_TRANSLATE_SYSTEM_NAME(string)

#endif	/* B_COLLECTING_CATKEYS */

#endif	/* B_AVOID_TRANSLATION_MACROS */


#endif /* _CATALOG_H_ */