NAME

AG_TextElement — agar dynamically-allocated multilanguage text buffer

SYNOPSIS

#include <agar/core.h>

DESCRIPTION

The AG_TextElement (or AG_Text) structure provides a dynamically-allocated buffer for a text element, specified in one or more languages.

Agar GUI widgets such as AG_Textbox(3) or AG_Editable(3) may be bound to a AG_TextElement (in which case they make it possible to select the language from a contextual menu). It is also possible to define an AG_Variable(3) referencing an AG_TextElement. It is defined as:

typedef struct ag_text {
	AG_Mutex lock;
	AG_TextEnt ent[AG_LANG_LAST]; /* Language entries */
	enum ag_language lang;        /* Selected language */
	AG_Size maxLen;               /* Maximum length (bytes) */
	Uint flags;
} AG_Text, AG_TextElement;

The lock mutex must be acquired prior to accessing any entry ent[]. The lang member is either AG_LANG_NONE or AG_LANG_xx, where xx is a ISO-639 language code. For convenience, the AG_LANG_* enums are also valid indices into public arrays agLanguageCodes[] (two-character codes) and agLanguageNames[] (full language names).

Per-language entries are described by the AG_TextEnt structure:

typedef struct ag_text_ent {
	char *buf;       /* String buffer */
	AG_Size maxLen;  /* Length (allocated) */
	AG_Size len;     /* Length (chars) */
} AG_TextEnt;

INTERFACE

AG_Text *
AG_TextNew(AG_Size maxLen);

void
AG_TextInit(AG_Text *T, AG_Size maxLen);

void
AG_TextSetLimit(AG_Text *T, AG_Size maxLen);

void
AG_TextDestroy(AG_Text *T);

void
AG_TextClear(AG_Text *T);

void
AG_TextSetLang(AG_Text *T, enum ag_language lang);

enum ag_language
AG_TextGetLang(AG_Text *T);

void
AG_TextSetLangISO(AG_Text *T, const char *lang_code);

const char *
AG_TextGetLangISO(AG_Text *T);

void
AG_TextSet(AG_Text *T, const char *fmt, ...);

void
AG_TextSetS(AG_Text *T, const char *s);

void
AG_TextSetEnt(AG_Text *T, enum ag_language lang, const char *fmt, ...);

void
AG_TextSetEntS(AG_Text *T, enum ag_language lang, const char *fmt, ...);

AG_Text *
AG_TextDup(AG_Text *T);

int
AG_TextLoad(AG_Text *T, AG_DataSource *ds);

void
AG_TextSave(AG_DataSource *ds, AG_Text *T);

The AG_TextNew() function allocates and initializes a new, empty AG_TextElement. AG_TextInit() initializes an existing AG_TextElement. The maxLen argument specifies a maximum string length in bytes, or 0 for no limit. AG_TextSetLimit() may be used to set the effective limit.

AG_TextDestroy() frees all resources allocated by a text element.

AG_TextClear() frees and reinitializes all entries of the element.

The functions AG_TextGetLang() and AG_TextSetLang() return or select the active language for a text element, specified as AG_LANG_NONE or AG_LANG_xx enum. The AG_TextGetLangISO() and AG_TextSetLangISO() variants accept a two-character ISO-639 code as argument.

The AG_TextSet() routine sets the text entry for the currently selected language. The AG_TextSetEnt() variant sets the text entry for the specified language.

The AG_TextDup() routine returns a newly-allocated copy of the specified text element.

The AG_TextLoad() function initializes the specified text element from AG_DataSource(3) data. AG_TextSave() saves the text element to the given data source.

EXAMPLES

The following GUI code creates a text element and binds an AG_Textbox(3) widget to it:

AG_Text *name;
AG_Textbox *tb;

name = AG_TextNew(32);
AG_TextSetEnt(name, AG_LANG_EN, "John");
AG_TextSetEnt(name, AG_LANG_FR, "Jean");
AG_TextSetEnt(name, AG_LANG_DE, "Johannes");

tb = AG_TextboxNewS(NULL, 0, "Name: ");
AG_TextboxBindText(tb, name);

SEE ALSO

AG_Editable(3), AG_Intro(3), AG_Text(3), AG_Textbox(3), AG_Variable(3)

HISTORY

The AG_TextElement interface first appeared in Agar 1.5.0