Index

Package: Language

Description

package Pango.Language is
---------------------------------------------------------------------------- -- Copyright (C) 1998-2000 E. Briot, J. Brobecker and A. Charlet -- Copyright (C) 2000-2014, AdaCore -- -- This library is free software; you can redistribute it and/or modify it -- under terms of the GNU General Public License as published by the Free -- Software Foundation; either version 3, or (at your option) any later -- version. This library is distributed in the hope that it will be useful, -- but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHAN- -- TABILITY or FITNESS FOR A PARTICULAR PURPOSE. -- -- As a special exception under Section 7 of GPL version 3, you are granted -- additional permissions described in the GCC Runtime Library Exception, -- version 3.1, as published by the Free Software Foundation. -- -- You should have received a copy of the GNU General Public License and -- a copy of the GCC Runtime Library Exception along with this program; -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- <http://www.gnu.org/licenses/>. -- -- ----------------------------------------------------------------------------

Packages

Pango_Script_Properties (new Glib.Generic_Properties.Generic_Internal_Discrete_Property)

package Pango_Script_Properties is
      new Generic_Internal_Discrete_Property (Pango_Script);

Classes

Pango_Language

type Pango_Language is new Glib.C_Boxed with null record;

Ancestors:

Primitive operations:

From_Object_Free
Get_Sample_String
Includes_Script

Types

Pango_Script

type Pango_Script is (
      Pango_Script_Invalid_Code,
      Pango_Script_Common,
      Pango_Script_Inherited,
      Pango_Script_Arabic,
      Pango_Script_Armenian,
      Pango_Script_Bengali,
      Pango_Script_Bopomofo,
      Pango_Script_Cherokee,
      Pango_Script_Coptic,
      Pango_Script_Cyrillic,
      Pango_Script_Deseret,
      Pango_Script_Devanagari,
      Pango_Script_Ethiopic,
      Pango_Script_Georgian,
      Pango_Script_Gothic,
      Pango_Script_Greek,
      Pango_Script_Gujarati,
      Pango_Script_Gurmukhi,
      Pango_Script_Han,
      Pango_Script_Hangul,
      Pango_Script_Hebrew,
      Pango_Script_Hiragana,
      Pango_Script_Kannada,
      Pango_Script_Katakana,
      Pango_Script_Khmer,
      Pango_Script_Lao,
      Pango_Script_Latin,
      Pango_Script_Malayalam,
      Pango_Script_Mongolian,
      Pango_Script_Myanmar,
      Pango_Script_Ogham,
      Pango_Script_Old_Italic,
      Pango_Script_Oriya,
      Pango_Script_Runic,
      Pango_Script_Sinhala,
      Pango_Script_Syriac,
      Pango_Script_Tamil,
      Pango_Script_Telugu,
      Pango_Script_Thaana,
      Pango_Script_Thai,
      Pango_Script_Tibetan,
      Pango_Script_Canadian_Aboriginal,
      Pango_Script_Yi,
      Pango_Script_Tagalog,
      Pango_Script_Hanunoo,
      Pango_Script_Buhid,
      Pango_Script_Tagbanwa,
      Pango_Script_Braille,
      Pango_Script_Cypriot,
      Pango_Script_Limbu,
      Pango_Script_Osmanya,
      Pango_Script_Shavian,
      Pango_Script_Linear_B,
      Pango_Script_Tai_Le,
      Pango_Script_Ugaritic,
      Pango_Script_New_Tai_Lue,
      Pango_Script_Buginese,
      Pango_Script_Glagolitic,
      Pango_Script_Tifinagh,
      Pango_Script_Syloti_Nagri,
      Pango_Script_Old_Persian,
      Pango_Script_Kharoshthi,
      Pango_Script_Unknown,
      Pango_Script_Balinese,
      Pango_Script_Cuneiform,
      Pango_Script_Phoenician,
      Pango_Script_Phags_Pa,
      Pango_Script_Nko,
      Pango_Script_Kayah_Li,
      Pango_Script_Lepcha,
      Pango_Script_Rejang,
      Pango_Script_Sundanese,
      Pango_Script_Saurashtra,
      Pango_Script_Cham,
      Pango_Script_Ol_Chiki,
      Pango_Script_Vai,
      Pango_Script_Carian,
      Pango_Script_Lycian,
      Pango_Script_Lydian,
      Pango_Script_Batak,
      Pango_Script_Brahmi,
      Pango_Script_Mandaic,
      Pango_Script_Chakma,
      Pango_Script_Meroitic_Cursive,
      Pango_Script_Meroitic_Hieroglyphs,
      Pango_Script_Miao,
      Pango_Script_Sharada,
      Pango_Script_Sora_Sompeng,
      Pango_Script_Takri);

Pango_Script_Array

type Pango_Script_Array is array (Natural range <>) of Pango_Script;

Property_Pango_Script

type Property_Pango_Script is new Pango_Script_Properties.Property;

Constants & Global variables

Null_Pango_Language (Pango_Language)

Null_Pango_Language : constant Pango_Language;

Subprograms & Entries

From_Object

function From_Object 
(Object: System.Address) return Pango_Language;

From_Object_Free

function From_Object_Free 
(B: access Pango_Language'Class) return Pango_Language;

Get_Type

function Get_Type return Glib.GType;

Get_Sample_String

function Get_Sample_String 
(Self: Pango_Language) return UTF8_String;
Get a string that is representative of the characters needed to render a particular language. The sample text may be a pangram, but is not necessarily. It is chosen to be demonstrative of normal text in the language, as well as exposing font feature requirements unique to the language. It is suitable for use as sample text in a font selection dialog. If Language is null, the default language as found by Pango.Language.Get_Default is used. If Pango does not have a sample string for Language, the classic "The quick brown fox..." is returned. This can be detected by comparing the returned pointer value to that returned for (non-existent) language code "xx". That is, compare to: pango_language_get_sample_string (pango_language_from_string ("xx"))

Get_Scripts

function Get_Scripts 
(Self: Pango_Language) return Pango_Script_Array;
Determines the scripts used to to write Language. If nothing is known about the language tag Language, or if Language is null, then null is returned. The list of scripts returned starts with the script that the language uses most and continues to the one it uses least. The value Num_Script points at will be set to the number of scripts in the returned array (or zero if null is returned). Most languages use only one script for writing, but there are some that use two (Latin and Cyrillic for example), and a few use three (Japanese for example). Applications should not make any assumptions on the maximum number of scripts returned though, except that it is positive if the return value is not null, and it is a small number. The Pango.Language.Includes_Script function uses this function internally. Since: gtk+ 1.22

Includes_Script

function Includes_Script 
(Self: Pango_Language;
Script: Pango_Script) return Boolean;
Determines if Script is one of the scripts used to write Language. The returned value is conservative; if nothing is known about the language tag Language, True will be returned, since, as far as Pango knows, Script might be used to write Language. This routine is used in Pango's itemization process when determining if a supplied language tag is relevant to a particular section of text. It probably is not useful for applications in most circumstances. This function uses Pango.Language.Get_Scripts internally. Since: gtk+ 1.4 "script": a Pango.Language.Pango_Script

Matches

function Matches 
(Self: Pango_Language;
Range_List: UTF8_String) return Boolean;
Checks if a language tag matches one of the elements in a list of language ranges. A language tag is considered to match a range in the list if the range is '*', the range is exactly the tag, or the range is a prefix of the tag, and the character after it in the tag is '-'. "range_list": a list of language ranges, separated by ';', ':', ',', or space characters. Each element must either be '*', or a RFC 3066 language range canonicalized as by Pango.Language.From_String

To_String

function To_String 
(Self: Pango_Language) return UTF8_String;
Gets the RFC-3066 format string representing the given language tag.

From_String

function From_String 
(Language: UTF8_String := "") return Pango_Language;
Take a RFC-3066 format language tag as a string and convert it to a Pango.Language.Pango_Language pointer that can be efficiently copied (copy the pointer) and compared with other language tags (compare the pointer.) This function first canonicalizes the string by converting it to lowercase, mapping '_' to '-', and stripping all characters other than letters and '-'. Use Pango.Language.Get_Default if you want to get the Pango.Language.Pango_Language for the current locale of the process. "language": a string representing a language tag, or null

Get_Default

function Get_Default return Pango_Language;
Returns the Pango.Language.Pango_Language for the current locale of the process. Note that this can change over the life of an application. On Unix systems, this is the return value is derived from 'setlocale(LC_CTYPE, NULL)', and the user can affect this through the environment variables LC_ALL, LC_CTYPE or LANG (checked in that order). The locale string typically is in the form lang_COUNTRY, where lang is an ISO-639 language code, and COUNTRY is an ISO-3166 country code. For instance, sv_FI for Swedish as written in Finland or pt_BR for Portuguese as written in Brazil. On Windows, the C library does not use any such environment variables, and setting them won't affect the behavior of functions like ctime. The user sets the locale through the Regional Options in the Control Panel. The C library (in the setlocale function) does not use country and language codes, but country and language names spelled out in English. However, this function does check the above environment variables, and does return a Unix-style locale string based on either said environment variables or the thread's current locale. Your application should call 'setlocale(LC_ALL, "");' for the user settings to take effect. Gtk+ does this in its initialization functions automatically (by calling gtk_set_locale). See 'man setlocale' for more details. Since: gtk+ 1.16