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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- ADA.STRINGS.TEXT_BUFFERS --
-- --
-- B o d y --
-- --
-- Copyright (C) 2020-2021, Free Software Foundation, Inc. --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 3, or (at your option) any later ver- --
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
-- 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/>. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
with Ada.Strings.UTF_Encoding.Wide_Strings;
with Ada.Strings.UTF_Encoding.Wide_Wide_Strings;
package body Ada.Strings.Text_Buffers is
function Current_Indent
(Buffer : Root_Buffer_Type) return Text_Buffer_Count is
(Text_Buffer_Count (Buffer.Indentation));
procedure Increase_Indent
(Buffer : in out Root_Buffer_Type;
Amount : Text_Buffer_Count := Standard_Indent)
is
begin
Buffer.Indentation := @ + Natural (Amount);
end Increase_Indent;
procedure Decrease_Indent
(Buffer : in out Root_Buffer_Type;
Amount : Text_Buffer_Count := Standard_Indent)
is
begin
Buffer.Indentation := @ - Natural (Amount);
end Decrease_Indent;
package body Output_Mapping is
-- Implement indentation in Put_UTF_8 and New_Line.
-- Implement other output procedures using Put_UTF_8.
procedure Put (Buffer : in out Buffer_Type; Item : String) is
begin
Put_UTF_8 (Buffer, Item);
end Put;
procedure Wide_Put (Buffer : in out Buffer_Type; Item : Wide_String) is
begin
Buffer.All_8_Bits :=
@ and then
(for all WChar of Item => Wide_Character'Pos (WChar) < 256);
Put_UTF_8 (Buffer, UTF_Encoding.Wide_Strings.Encode (Item));
end Wide_Put;
procedure Wide_Wide_Put
(Buffer : in out Buffer_Type; Item : Wide_Wide_String)
is
begin
Buffer.All_8_Bits :=
@ and then
(for all WWChar of Item => Wide_Wide_Character'Pos (WWChar) < 256);
Put_UTF_8 (Buffer, UTF_Encoding.Wide_Wide_Strings.Encode (Item));
end Wide_Wide_Put;
procedure Put_UTF_8
(Buffer : in out Buffer_Type;
Item : UTF_Encoding.UTF_8_String) is
begin
if Item'Length = 0 then
return;
end if;
if Buffer.Indent_Pending then
Buffer.Indent_Pending := False;
if Buffer.Indentation > 0 then
Put_UTF_8_Implementation
(Buffer, (1 .. Buffer.Indentation => ' '));
end if;
end if;
Put_UTF_8_Implementation (Buffer, Item);
end Put_UTF_8;
procedure Wide_Put_UTF_16
(Buffer : in out Buffer_Type; Item : UTF_Encoding.UTF_16_Wide_String)
is
begin
Wide_Wide_Put (Buffer, UTF_Encoding.Wide_Wide_Strings.Decode (Item));
end Wide_Put_UTF_16;
procedure New_Line (Buffer : in out Buffer_Type) is
begin
Buffer.Indent_Pending := False; -- just for a moment
Put (Buffer, (1 => ASCII.LF));
Buffer.Indent_Pending := True;
Buffer.UTF_8_Column := 1;
end New_Line;
end Output_Mapping;
end Ada.Strings.Text_Buffers;
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