diouzhtu/src/diouzhtu.adb

   1 ------------------------------------------------------------------------------
   2 --                               Diouzhtu                                   --
   3 --                                                                          --
   4 --                       Copyright (C) 2007-2008                            --
   5 --                            Olivier Ramonat                               --
   6 --                                                                          --
   7 --  This library is free software; you can redistribute it and/or modify    --
   8 --  it under the terms of the GNU General Public License as published by    --
   9 --  the Free Software Foundation; either version 2 of the License, or (at   --
  10 --  your option) any later version.                                         --
  11 --                                                                          --
  12 --  This library is distributed in the hope that it will be useful, but     --
  13 --  WITHOUT ANY WARRANTY; without even the implied warranty of              --
  14 --  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU       --
  15 --  General Public License for more details.                                --
  16 --                                                                          --
  17 --  You should have received a copy of the GNU General Public License       --
  18 --  along with this library; if not, write to the Free Software Foundation, --
  19 --  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.       --
  20 ------------------------------------------------------------------------------
  21
  22 with Ada.Containers.Vectors;
  23
  24 package body Diouzhtu is
  25
  26    use Ada;
  27    use Ada.Strings.Unbounded;
  28
  29    type Callback is record
  30       To_HTML : Converter;
  31    end record;
  32
  33    package Callbacks is new Containers.Vectors
  34      (Index_Type   => Positive,
  35       Element_Type => Callback,
  36       "="          => "=");
  37    use Callbacks;
  38
  39    Blocks  : Vector := Empty_Vector;
  40    Inlines : Vector := Empty_Vector;
  41
  42    ----------------
  43    -- Initialize --
  44    ----------------
  45
  46    function Initialize
  47      (Base_URL     : in String;
  48       Img_Base_URL   : in String;
  49       Text_Directory : in String)
  50       return Wiki_Information is
  51    begin
  52       return Wiki_Information'
  53         (Base_URL       => To_Unbounded_String (Base_URL),
  54          Img_Base_URL   => To_Unbounded_String (Img_Base_URL),
  55          Text_Directory => To_Unbounded_String (Text_Directory));
  56    end Initialize;
  57
  58    -----------------------
  59    -- Internal_Register --
  60    -----------------------
  61
  62    procedure Internal_Register
  63      (Level   : in Register_Level;
  64       To_HTML : in Converter)
  65    is
  66       Register_Callback : Callback;
  67    begin
  68       Register_Callback.To_HTML := To_HTML;
  69       if Level = Block_Level then
  70          Blocks.Append (Register_Callback);
  71       else
  72          Inlines.Append (Register_Callback);
  73       end if;
  74    end Internal_Register;
  75
  76    -----------
  77    -- Parse --
  78    -----------
  79
  80    function Parse
  81      (Wiki    : in Wiki_Information;
  82       Level   : in Register_Level;
  83       Content : in String;
  84       Index   : in Natural := 0)
  85      return String
  86    is
  87       Current   : Positive;
  88       Container : Vector;
  89    begin
  90       if Level = Block_Level then
  91          Container := Blocks;
  92       else
  93          Container := Inlines;
  94       end if;
  95
  96       if Index = 0  then
  97          Current := Container.First_Index;
  98       else
  99          Current := Index + 1;
 100       end if;
 101
 102       if Last_Index (Container) >= Current then
 103          return Callback (Element (Container, Current)).To_HTML
 104            (Wiki, Current, Content);
 105       end if;
 106
 107       return Content;
 108    end Parse;
 109
 110    --------------
 111    -- Register --
 112    --------------
 113
 114    procedure Register
 115      (Level   : in Register_Level;
 116       To_HTML : Converter)
 117    is
 118       Register_Callback : Callback;
 119    begin
 120       --  ???
 121       --  First Inlines callback is code and user callbacks should
 122       --  not erase this.
 123       --  Insert them after code callback
 124
 125       Register_Callback.To_HTML := To_HTML;
 126       if Level = Block_Level then
 127          Blocks.Prepend (New_Item  => Register_Callback);
 128       else
 129          Inlines.Insert (Before   => Next (Inlines.First),
 130                          New_Item => Register_Callback);
 131       end if;
 132    end Register;
 133
 134 end Diouzhtu;