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Overview
Comment:lithium-spoiler_filters: new filter to rot13-scramble spoiler spans
Timelines: family | ancestors | descendants | both | trunk
Files: files | file ages | folders
SHA1: 2f20876918b439fa6a22a70753e9f32f6b9f59e3
User & Date: nat 2019-03-04 19:59:02
Context
2019-03-30
22:38
lithium-dispatchers: add a user database backend check-in: c899867743 user: nat tags: trunk
2019-03-04
19:59
lithium-spoiler_filters: new filter to rot13-scramble spoiler spans check-in: 2f20876918 user: nat tags: trunk
2019-03-03
19:37
lithium-markdown: add a "spoiler" span element, marked by double '%' check-in: 00a97167e5 user: nat tags: trunk
Changes
Hide Diffs Unified Diffs Ignore Whitespace Patch

Changes to src/lithium-dispatchers.adb. 

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------------------------------------------------------------------------------
-- Copyright (c) 2015-2017, Natacha Porté                                   --
--                                                                          --
-- Permission to use, copy, modify, and distribute this software for any    --
-- purpose with or without fee is hereby granted, provided that the above   --
-- copyright notice and this permission notice appear in all copies.        --
--                                                                          --
-- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES --
-- WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF         --


|








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------------------------------------------------------------------------------
-- Copyright (c) 2015-2019, Natacha Porté                                   --
--                                                                          --
-- Permission to use, copy, modify, and distribute this software for any    --
-- purpose with or without fee is hereby granted, provided that the above   --
-- copyright notice and this permission notice appear in all copies.        --
--                                                                          --
-- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES --
-- WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF         --
︙︙
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with Natools.Web.Tag_Pages;

with Lithium.Access_Log;
with Lithium.Comment_Cookie_Smaz;
with Lithium.Exception_Log;
with Lithium.Legacy_Filters;
with Lithium.Markdown.Filters;


package body Lithium.Dispatchers is

   overriding function Clone (Object : Handler) return Handler is
   begin
      return Object;
   end Clone;








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with Natools.Web.Tag_Pages;

with Lithium.Access_Log;
with Lithium.Comment_Cookie_Smaz;
with Lithium.Exception_Log;
with Lithium.Legacy_Filters;
with Lithium.Markdown.Filters;
with Lithium.Spoiler_Filters;

package body Lithium.Dispatchers is

   overriding function Clone (Object : Handler) return Handler is
   begin
      return Object;
   end Clone;
︙︙
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        ("html-escape", Natools.Web.Escapes.Filters.Create'Access);
      Holder.Register
        ("legacy-comment", Lithium.Legacy_Filters.Create'Access);
      Holder.Register
        ("pass-through", Natools.Web.Filters.Pass_Through.Create'Access);
      Holder.Register
        ("replace-text", Natools.Web.Filters.Text_Replacement.Create'Access);


      Holder.Register
        ("text-block", Natools.Web.Filters.Text_Blocks.Create'Access);

      Holder.Register
        (Comment_Cookie_Smaz.Key, Comment_Cookie_Smaz.Decoder'Access);
      Holder.Set_Cookie_Encoder
        (Comment_Cookie_Smaz.Encoder'Access,








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>








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        ("html-escape", Natools.Web.Escapes.Filters.Create'Access);
      Holder.Register
        ("legacy-comment", Lithium.Legacy_Filters.Create'Access);
      Holder.Register
        ("pass-through", Natools.Web.Filters.Pass_Through.Create'Access);
      Holder.Register
        ("replace-text", Natools.Web.Filters.Text_Replacement.Create'Access);
      Holder.Register
        ("spoiler-filter", Lithium.Spoiler_Filters.Create'Access);
      Holder.Register
        ("text-block", Natools.Web.Filters.Text_Blocks.Create'Access);

      Holder.Register
        (Comment_Cookie_Smaz.Key, Comment_Cookie_Smaz.Decoder'Access);
      Holder.Set_Cookie_Encoder
        (Comment_Cookie_Smaz.Encoder'Access,
︙︙

Changes to src/lithium-markdown.adb. 

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------------------------------------------------------------------------------
-- Copyright (c) 2015-2017, Natacha Porté                                   --
--                                                                          --
-- Permission to use, copy, modify, and distribute this software for any    --
-- purpose with or without fee is hereby granted, provided that the above   --
-- copyright notice and this permission notice appear in all copies.        --
--                                                                          --
-- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES --
-- WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF         --
-- MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR  --
-- ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES   --
-- WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN    --
-- ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF  --
-- OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.           --
------------------------------------------------------------------------------

with Ada.Exceptions;
with Ada.Text_IO;
with Markup.Parsers.Markdown.Extensions;
with Markup.Renderers.Html;
with Natools.S_Expressions.Atom_Buffers;



package body Lithium.Markdown is

   package Sx renames Natools.S_Expressions;

   type Buffer_Access is access Sx.Atom_Buffers.Atom_Buffer;



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------------------------------------------------------------------------------
-- Copyright (c) 2015-2019, Natacha Porté                                   --
--                                                                          --
-- Permission to use, copy, modify, and distribute this software for any    --
-- purpose with or without fee is hereby granted, provided that the above   --
-- copyright notice and this permission notice appear in all copies.        --
--                                                                          --
-- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES --
-- WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF         --
-- MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR  --
-- ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES   --
-- WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN    --
-- ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF  --
-- OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.           --
------------------------------------------------------------------------------

with Ada.Exceptions;
with Ada.Text_IO;
with Markup.Parsers.Markdown.Extensions;
with Markup.Renderers.Html;
with Natools.S_Expressions.Atom_Buffers;

with Lithium.Spoiler_Filters;

package body Lithium.Markdown is

   package Sx renames Natools.S_Expressions;

   type Buffer_Access is access Sx.Atom_Buffers.Atom_Buffer;
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   begin
      Element.Buffer.Append (Sx.To_Atom (Text));
   end Append;


   overriding procedure Close (Element : in out Spoiler_Span) is
   begin
      Element.Buffer.Append (Sx.To_Atom ("</span>"));
   end Close;


   function Export (Buffer : Sx.Atom_Buffers.Atom_Buffer)
     return Sx.Atom_Refs.Immutable_Reference
   is
      use type Sx.Offset;








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   begin
      Element.Buffer.Append (Sx.To_Atom (Text));
   end Append;


   overriding procedure Close (Element : in out Spoiler_Span) is
   begin
      Element.Buffer.Append (Spoiler_Filters.End_HTML);
   end Close;


   function Export (Buffer : Sx.Atom_Buffers.Atom_Buffer)
     return Sx.Atom_Refs.Immutable_Reference
   is
      use type Sx.Offset;
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   begin
      Element.Destination.Soft_Reset;
      Element.Destination.Append (Element.Source.Data);
   end Open;

   overriding procedure Open (Element : in out Spoiler_Span) is
   begin
      Element.Buffer.Append (Sx.To_Atom ("<span class=""spoiler"">"));
   end Open;



   -----------------
   -- Worker Tasks --
   -----------------








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   begin
      Element.Destination.Soft_Reset;
      Element.Destination.Append (Element.Source.Data);
   end Open;

   overriding procedure Open (Element : in out Spoiler_Span) is
   begin
      Element.Buffer.Append (Spoiler_Filters.Begin_HTML);
   end Open;



   -----------------
   -- Worker Tasks --
   -----------------
︙︙

Added src/lithium-spoiler_filters.adb. 









































































































































































































































































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------------------------------------------------------------------------------
-- Copyright (c) 2017-2019, Natacha Porté                                   --
--                                                                          --
-- Permission to use, copy, modify, and distribute this software for any    --
-- purpose with or without fee is hereby granted, provided that the above   --
-- copyright notice and this permission notice appear in all copies.        --
--                                                                          --
-- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES --
-- WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF         --
-- MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR  --
-- ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES   --
-- WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN    --
-- ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF  --
-- OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.           --
------------------------------------------------------------------------------

package body Lithium.Spoiler_Filters is
   use type Ada.Streams.Stream_Element;

   function Next
     (Data : in Ada.Streams.Stream_Element_Array;
      Start : in Ada.Streams.Stream_Element_Offset;
      Pattern : Ada.Streams.Stream_Element_Array)
     return Ada.Streams.Stream_Element_Offset;

   function Rot_13 (Source : Ada.Streams.Stream_Element_Array)
     return Ada.Streams.Stream_Element_Array;

   function Rot_13 (Source : Ada.Streams.Stream_Element)
     return Ada.Streams.Stream_Element
     is (case Source is
         when Character'Pos ('A') .. Character'Pos ('M')
            | Character'Pos ('a') .. Character'Pos ('m')
            => Source + 13,
         when Character'Pos ('N') .. Character'Pos ('Z')
            | Character'Pos ('n') .. Character'Pos ('z')
            => Source - 13,
         when others => Source);


   ------------------------------
   -- Local Helper Subprograms --
   ------------------------------

   function Next
     (Data : in Ada.Streams.Stream_Element_Array;
      Start : in Ada.Streams.Stream_Element_Offset;
      Pattern : Ada.Streams.Stream_Element_Array)
     return Ada.Streams.Stream_Element_Offset
   is
      use type Ada.Streams.Stream_Element_Array;
      use type Ada.Streams.Stream_Element_Offset;
      Index : Ada.Streams.Stream_Element_Offset := Start;
   begin
      while Index + Pattern'Length - 1 in Data'Range loop
         if Data (Index .. Index + Pattern'Length - 1) = Pattern then
            return Index;
         end if;

         Index := Index + 1;
      end loop;

      return Start - 1;
   end Next;


   function Rot_13 (Source : Ada.Streams.Stream_Element_Array)
     return Ada.Streams.Stream_Element_Array is
   begin
      return Result : Ada.Streams.Stream_Element_Array
                        (Source'First .. Source'Last)
      do
         for I in Result'Range loop
            Result (I) := Rot_13 (Source (I));
         end loop;
      end return;
   end Rot_13;



   ----------------------
   -- Public Interface --
   ----------------------

   overriding procedure Apply
     (Object : in Spoiler_Filter;
      Output : in out Ada.Streams.Root_Stream_Type'Class;
      Data : in Ada.Streams.Stream_Element_Array)
   is
      pragma Unreferenced (Object);
      use type Ada.Streams.Stream_Element_Array;
      use type Ada.Streams.Stream_Element_Offset;

      Index : Ada.Streams.Stream_Element_Offset := Data'First;
      First, Last : Ada.Streams.Stream_Element_Offset;
   begin
      while Index in Data'Range loop
         First := Next (Data, Index, Begin_HTML);
         exit when First < Index;

         Last := Next (Data, First + Begin_HTML'Length, End_HTML);
         exit when Last < First;

         if First > Index then
            Output.Write (Data (Index .. First - 1));
         end if;

         Output.Write
           (Begin_Filtered
              & Rot_13 (Data (First + Begin_HTML'Length .. Last - 1))
              & End_Filtered);

         Index := Last + End_HTML'Length;
      end loop;

      if Index in Data'Range then
         Output.Write (Data (Index .. Data'Last));
      end if;
   end Apply;


   function Create
     (Arguments : in out Natools.S_Expressions.Lockable.Descriptor'Class)
     return Natools.Web.Filters.Filter'Class
   is
      pragma Unreferenced (Arguments);
   begin
      return Spoiler_Filter'(null record);
   end Create;

end Lithium.Spoiler_Filters;

Added src/lithium-spoiler_filters.ads. 





























































































































































































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------------------------------------------------------------------------------
-- Copyright (c) 2017-2019, Natacha Porté                                   --
--                                                                          --
-- Permission to use, copy, modify, and distribute this software for any    --
-- purpose with or without fee is hereby granted, provided that the above   --
-- copyright notice and this permission notice appear in all copies.        --
--                                                                          --
-- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES --
-- WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF         --
-- MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR  --
-- ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES   --
-- WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN    --
-- ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF  --
-- OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.           --
------------------------------------------------------------------------------

------------------------------------------------------------------------------
-- Lithium.Spoiler_Filters provides a filter to encode spoilers in rot13,   --
-- for situations where CSS might not apply (e.g. ATOM feeds).              --
------------------------------------------------------------------------------

with Ada.Streams;
with Natools.S_Expressions.Lockable;
with Natools.Web.Filters;

package Lithium.Spoiler_Filters is
   pragma Preelaborate;

   type Spoiler_Filter is new Natools.Web.Filters.Filter with private;

   overriding procedure Apply
     (Object : in Spoiler_Filter;
      Output : in out Ada.Streams.Root_Stream_Type'Class;
      Data : in Ada.Streams.Stream_Element_Array);

   function Create
     (Arguments : in out Natools.S_Expressions.Lockable.Descriptor'Class)
     return Natools.Web.Filters.Filter'Class;


   Begin_HTML : constant Natools.S_Expressions.Atom
     := (1 => Character'Pos ('<'),
         2 => Character'Pos ('s'),
         3 => Character'Pos ('p'),
         4 => Character'Pos ('a'),
         5 => Character'Pos ('n'),
         6 => Character'Pos (' '),
         7 => Character'Pos ('c'),
         8 => Character'Pos ('l'),
         9 => Character'Pos ('a'),
        10 => Character'Pos ('s'),
        11 => Character'Pos ('s'),
        12 => Character'Pos ('='),
        13 => Character'Pos ('"'),
        14 => Character'Pos ('s'),
        15 => Character'Pos ('p'),
        16 => Character'Pos ('o'),
        17 => Character'Pos ('i'),
        18 => Character'Pos ('l'),
        19 => Character'Pos ('e'),
        20 => Character'Pos ('r'),
        21 => Character'Pos ('"'),
        22 => Character'Pos ('>'));

   End_HTML : constant Natools.S_Expressions.Atom
     := (1 => Character'Pos ('<'),
         2 => Character'Pos ('/'),
         3 => Character'Pos ('s'),
         4 => Character'Pos ('p'),
         5 => Character'Pos ('a'),
         6 => Character'Pos ('n'),
         7 => Character'Pos ('>'));

   Begin_Filtered : constant Natools.S_Expressions.Atom
     := (1 => Character'Pos ('['),
         2 => Character'Pos ('S'),
         3 => Character'Pos ('P'),
         4 => Character'Pos ('O'),
         5 => Character'Pos ('I'),
         6 => Character'Pos ('L'),
         7 => Character'Pos ('E'),
         8 => Character'Pos ('R'),
         9 => Character'Pos (']'),
        10 => Character'Pos ('['));

   End_Filtered : constant Natools.S_Expressions.Atom
     := (1 => Character'Pos (']'));

private

   type Spoiler_Filter is new Natools.Web.Filters.Filter with null record;

end Lithium.Spoiler_Filters;

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