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185 | ------------------------------------------------------------------------------
-- --
-- Copyright (C) 1998-2000 E. Briot, J. Brobecker and A. Charlet --
-- Copyright (C) 2000-2022, 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/>. --
-- --
------------------------------------------------------------------------------
pragma Style_Checks (Off);
pragma Warnings (Off, "*is already use-visible*");
with Ada.Unchecked_Conversion;
with Glib.Type_Conversion_Hooks; use Glib.Type_Conversion_Hooks;
package body Pango.Fontset is
procedure C_Pango_Fontset_Foreach
(Self : System.Address;
Func : System.Address;
Data : System.Address);
pragma Import (C, C_Pango_Fontset_Foreach, "pango_fontset_foreach");
-- Iterates through all the fonts in a fontset, calling Func for each one.
-- If Func returns True, that stops the iteration.
-- Since: gtk+ 1.4
-- "func": Callback function
-- "data": data to pass to the callback function
function To_Pango_Fontset_Foreach_Func is new Ada.Unchecked_Conversion
(System.Address, Pango_Fontset_Foreach_Func);
function To_Address is new Ada.Unchecked_Conversion
(Pango_Fontset_Foreach_Func, System.Address);
function Internal_Pango_Fontset_Foreach_Func
(Fontset : System.Address;
Font : System.Address;
User_Data : System.Address) return Glib.Gboolean;
pragma Convention (C, Internal_Pango_Fontset_Foreach_Func);
-- "fontset": a Pango.Fontset.Pango_Fontset
-- "font": a font from Fontset
-- "user_data": callback data
-----------------------------------------
-- Internal_Pango_Fontset_Foreach_Func --
-----------------------------------------
function Internal_Pango_Fontset_Foreach_Func
(Fontset : System.Address;
Font : System.Address;
User_Data : System.Address) return Glib.Gboolean
is
Func : constant Pango_Fontset_Foreach_Func := To_Pango_Fontset_Foreach_Func (User_Data);
Stub_Pango_Fontset : Pango_Fontset_Record;
Stub_Pango_Font : Pango.Font.Pango_Font_Record;
begin
return Boolean'Pos (Func (Pango.Fontset.Pango_Fontset (Get_User_Data (Fontset, Stub_Pango_Fontset)), Pango.Font.Pango_Font (Get_User_Data (Font, Stub_Pango_Font))));
end Internal_Pango_Fontset_Foreach_Func;
package Type_Conversion_Pango_Fontset is new Glib.Type_Conversion_Hooks.Hook_Registrator
(Get_Type'Access, Pango_Fontset_Record);
pragma Unreferenced (Type_Conversion_Pango_Fontset);
-------------
-- Foreach --
-------------
procedure Foreach
(Self : not null access Pango_Fontset_Record;
Func : Pango_Fontset_Foreach_Func)
is
begin
if Func = null then
C_Pango_Fontset_Foreach (Get_Object (Self), System.Null_Address, System.Null_Address);
else
C_Pango_Fontset_Foreach (Get_Object (Self), Internal_Pango_Fontset_Foreach_Func'Address, To_Address (Func));
end if;
end Foreach;
package body Foreach_User_Data is
package Users is new Glib.Object.User_Data_Closure
(User_Data_Type, Destroy);
function To_Pango_Fontset_Foreach_Func is new Ada.Unchecked_Conversion
(System.Address, Pango_Fontset_Foreach_Func);
function To_Address is new Ada.Unchecked_Conversion
(Pango_Fontset_Foreach_Func, System.Address);
function Internal_Cb
(Fontset : System.Address;
Font : System.Address;
User_Data : System.Address) return Glib.Gboolean;
pragma Convention (C, Internal_Cb);
-- A callback function used by Pango.Fontset.Foreach when enumerating
-- the fonts in a fontset.
-- Since: gtk+ 1.4
-- "fontset": a Pango.Fontset.Pango_Fontset
-- "font": a font from Fontset
-- "user_data": callback data
-------------
-- Foreach --
-------------
procedure Foreach
(Self : not null access Pango.Fontset.Pango_Fontset_Record'Class;
Func : Pango_Fontset_Foreach_Func;
Data : User_Data_Type)
is
D : System.Address;
begin
if Func = null then
C_Pango_Fontset_Foreach (Get_Object (Self), System.Null_Address, System.Null_Address);
else
D := Users.Build (To_Address (Func), Data);
C_Pango_Fontset_Foreach (Get_Object (Self), Internal_Cb'Address, D);
Users.Free_Data (D);
end if;
end Foreach;
-----------------
-- Internal_Cb --
-----------------
function Internal_Cb
(Fontset : System.Address;
Font : System.Address;
User_Data : System.Address) return Glib.Gboolean
is
D : constant Users.Internal_Data_Access := Users.Convert (User_Data);
Stub_Pango_Fontset : Pango.Fontset.Pango_Fontset_Record;
Stub_Pango_Font : Pango.Font.Pango_Font_Record;
begin
return Boolean'Pos (To_Pango_Fontset_Foreach_Func (D.Func) (Pango.Fontset.Pango_Fontset (Get_User_Data (Fontset, Stub_Pango_Fontset)), Pango.Font.Pango_Font (Get_User_Data (Font, Stub_Pango_Font)), D.Data.all));
end Internal_Cb;
end Foreach_User_Data;
--------------
-- Get_Font --
--------------
function Get_Font
(Self : not null access Pango_Fontset_Record;
Wc : Guint) return Pango.Font.Pango_Font
is
function Internal
(Self : System.Address;
Wc : Guint) return System.Address;
pragma Import (C, Internal, "pango_fontset_get_font");
Stub_Pango_Font : Pango.Font.Pango_Font_Record;
begin
return Pango.Font.Pango_Font (Get_User_Data (Internal (Get_Object (Self), Wc), Stub_Pango_Font));
end Get_Font;
-----------------
-- Get_Metrics --
-----------------
function Get_Metrics
(Self : not null access Pango_Fontset_Record)
return Pango.Font_Metrics.Pango_Font_Metrics
is
function Internal (Self : System.Address) return System.Address;
pragma Import (C, Internal, "pango_fontset_get_metrics");
begin
return From_Object (Internal (Get_Object (Self)));
end Get_Metrics;
end Pango.Fontset;
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