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400 | -----------------------------------------------------------------------
-- awa-components-wikis -- Wiki rendering component
-- Copyright (C) 2011, 2012, 2013, 2015, 2016, 2018, 2020, 2021, 2022 Stephane Carrez
-- Written by Stephane Carrez (Stephane.Carrez@gmail.com)
--
-- Licensed under the Apache License, Version 2.0 (the "License");
-- you may not use this file except in compliance with the License.
-- You may obtain a copy of the License at
--
-- http://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an "AS IS" BASIS,
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- See the License for the specific language governing permissions and
-- limitations under the License.
-----------------------------------------------------------------------
with Util.Strings;
with Ada.Characters.Conversions;
with ASF.Contexts.Writer;
with ASF.Utils;
with Wiki.Documents;
with Wiki.Parsers;
with Wiki.Helpers;
with Wiki.Render.Html;
with Wiki.Render.Text;
with Wiki.Filters.Html;
with Wiki.Filters.TOC;
with Wiki.Filters.Autolink;
with Wiki.Filters.Variables;
with Wiki.Streams.Html;
package body AWA.Components.Wikis is
WIKI_ATTRIBUTE_NAMES : Util.Strings.String_Set.Set;
type Html_Writer_Type is limited new Wiki.Streams.Html.Html_Output_Stream with record
Writer : ASF.Contexts.Writer.Response_Writer_Access;
end record;
overriding
procedure Write (Writer : in out Html_Writer_Type;
Content : in Wide_Wide_String);
-- Write a single character to the string builder.
overriding
procedure Write (Writer : in out Html_Writer_Type;
Char : in Wide_Wide_Character);
-- Write an XML attribute within an XML element.
-- The attribute value is escaped according to the XML escape rules.
overriding
procedure Write_Wide_Attribute (Writer : in out Html_Writer_Type;
Name : in String;
Content : in Unbounded_Wide_Wide_String);
-- Write an XML attribute within an XML element.
-- The attribute value is escaped according to the XML escape rules.
overriding
procedure Write_Wide_Attribute (Writer : in out Html_Writer_Type;
Name : in String;
Content : in Wiki.Strings.WString);
-- Start an XML element with the given name.
overriding
procedure Start_Element (Writer : in out Html_Writer_Type;
Name : in String);
-- Closes an XML element of the given name.
overriding
procedure End_Element (Writer : in out Html_Writer_Type;
Name : in String);
-- Write a text escaping any character as necessary.
overriding
procedure Write_Wide_Text (Writer : in out Html_Writer_Type;
Content : in Wiki.Strings.WString);
overriding
procedure Write (Writer : in out Html_Writer_Type;
Content : in Wiki.Strings.WString) is
begin
Writer.Writer.Write_Wide_Raw (Content);
end Write;
-- ------------------------------
-- Write a single character to the string builder.
-- ------------------------------
overriding
procedure Write (Writer : in out Html_Writer_Type;
Char : in Wide_Wide_Character) is
begin
Writer.Writer.Write_Wide_Char (Char);
end Write;
-- ------------------------------
-- Write an XML attribute within an XML element.
-- The attribute value is escaped according to the XML escape rules.
-- ------------------------------
overriding
procedure Write_Wide_Attribute (Writer : in out Html_Writer_Type;
Name : in String;
Content : in Unbounded_Wide_Wide_String) is
begin
Writer.Writer.Write_Wide_Attribute (Name, Content);
end Write_Wide_Attribute;
-- ------------------------------
-- Write an XML attribute within an XML element.
-- The attribute value is escaped according to the XML escape rules.
-- ------------------------------
overriding
procedure Write_Wide_Attribute (Writer : in out Html_Writer_Type;
Name : in String;
Content : in Wiki.Strings.WString) is
begin
Writer.Writer.Write_Wide_Attribute (Name, Content);
end Write_Wide_Attribute;
-- ------------------------------
-- Start an XML element with the given name.
-- ------------------------------
overriding
procedure Start_Element (Writer : in out Html_Writer_Type;
Name : in String) is
begin
Writer.Writer.Start_Element (Name);
end Start_Element;
-- ------------------------------
-- Closes an XML element of the given name.
-- ------------------------------
overriding
procedure End_Element (Writer : in out Html_Writer_Type;
Name : in String) is
begin
Writer.Writer.End_Element (Name);
end End_Element;
-- ------------------------------
-- Write a text escaping any character as necessary.
-- ------------------------------
overriding
procedure Write_Wide_Text (Writer : in out Html_Writer_Type;
Content : in Wiki.Strings.WString) is
begin
Writer.Writer.Write_Wide_Text (Content);
end Write_Wide_Text;
-- ------------------------------
-- Get the wiki format style. The format style is obtained from the <b>format</b>
-- attribute name.
-- ------------------------------
function Get_Wiki_Style (UI : in UIWiki;
Context : in Faces_Context'Class)
return Wiki.Wiki_Syntax is
Format : constant String := UI.Get_Attribute (Name => FORMAT_NAME,
Context => Context,
Default => "dotclear");
begin
if Format in "dotclear" | "FORMAT_DOTCLEAR" then
return Wiki.SYNTAX_DOTCLEAR;
elsif Format = "google" then
return Wiki.SYNTAX_GOOGLE;
elsif Format in "phpbb" | "FORMAT_PHPBB" then
return Wiki.SYNTAX_PHPBB;
elsif Format in "creole" | "FORMAT_CREOLE" then
return Wiki.SYNTAX_CREOLE;
elsif Format in "markdown" | "FORMAT_MARKDOWN" then
return Wiki.SYNTAX_MARKDOWN;
elsif Format in "mediawiki" | "FORMAT_MEDIAWIKI" then
return Wiki.SYNTAX_MEDIA_WIKI;
elsif Format in "html" | "FORMAT_HTML" then
return Wiki.SYNTAX_HTML;
else
return Wiki.SYNTAX_MARKDOWN;
end if;
end Get_Wiki_Style;
-- ------------------------------
-- Get the links renderer that must be used to render image and page links.
-- ------------------------------
function Get_Links_Renderer (UI : in UIWiki;
Context : in Faces_Context'Class)
return Wiki.Render.Links.Link_Renderer_Access is
Value : constant Util.Beans.Objects.Object := UI.Get_Attribute (Context, LINKS_NAME);
Bean : constant access Util.Beans.Basic.Readonly_Bean'Class
:= Util.Beans.Objects.To_Bean (Value);
begin
if Bean = null then
return null;
elsif not (Bean.all in Link_Renderer_Bean'Class) then
return null;
else
return Link_Renderer_Bean'Class (Bean.all)'Access;
end if;
end Get_Links_Renderer;
-- ------------------------------
-- Get the plugin factory that must be used by the Wiki parser.
-- ------------------------------
function Get_Plugin_Factory (UI : in UIWiki;
Context : in Faces_Context'Class)
return Wiki.Plugins.Plugin_Factory_Access is
Value : constant Util.Beans.Objects.Object := UI.Get_Attribute (Context, PLUGINS_NAME);
Bean : constant access Util.Beans.Basic.Readonly_Bean'Class
:= Util.Beans.Objects.To_Bean (Value);
begin
if Bean = null then
return null;
elsif not (Bean.all in Wiki.Plugins.Plugin_Factory'Class) then
return null;
else
return Wiki.Plugins.Plugin_Factory'Class (Bean.all)'Access;
end if;
end Get_Plugin_Factory;
-- ------------------------------
-- Returns true if we must render a text content instead of html.
-- ------------------------------
function Is_Text (UI : in UIWiki;
Context : in Faces_Context'Class) return Boolean is
use type Util.Beans.Objects.Object;
Output : constant Util.Beans.Objects.Object := UI.Get_Attribute (Context, OUTPUT_NAME);
begin
if Util.Beans.Objects.Is_Null (Output) then
return False;
end if;
return Output = Util.Beans.Objects.To_Object (String '("text"));
end Is_Text;
-- ------------------------------
-- Render the wiki text
-- ------------------------------
overriding
procedure Encode_Begin (UI : in UIWiki;
Context : in out Faces_Context'Class) is
use ASF.Contexts.Writer;
use type Wiki.Render.Links.Link_Renderer_Access;
use type Wiki.Plugins.Plugin_Factory_Access;
begin
if not UI.Is_Rendered (Context) then
return;
end if;
declare
Writer : constant Response_Writer_Access := Context.Get_Response_Writer;
Doc : Wiki.Documents.Document;
TOC : aliased Wiki.Filters.TOC.TOC_Filter;
Autolink : aliased Wiki.Filters.Autolink.Autolink_Filter;
Filter : aliased Wiki.Filters.Html.Html_Filter_Type;
Vars : aliased Wiki.Filters.Variables.Variable_Filter;
Format : constant Wiki.Wiki_Syntax := UI.Get_Wiki_Style (Context);
Value : constant Util.Beans.Objects.Object := UI.Get_Attribute (Context, VALUE_NAME);
Is_Text : constant Boolean := UI.Is_Text (Context);
Links : Wiki.Render.Links.Link_Renderer_Access;
Plugins : Wiki.Plugins.Plugin_Factory_Access;
Engine : Wiki.Parsers.Parser;
begin
if not Is_Text then
Writer.Start_Element ("div");
UI.Render_Attributes (Context, WIKI_ATTRIBUTE_NAMES, Writer);
end if;
if not Util.Beans.Objects.Is_Empty (Value) then
Plugins := UI.Get_Plugin_Factory (Context);
if Plugins /= null then
Engine.Set_Plugin_Factory (Plugins);
end if;
Links := UI.Get_Links_Renderer (Context);
Engine.Add_Filter (Autolink'Unchecked_Access);
Engine.Add_Filter (Vars'Unchecked_Access);
Engine.Add_Filter (TOC'Unchecked_Access);
Engine.Add_Filter (Filter'Unchecked_Access);
Engine.Set_Syntax (Format);
Engine.Parse (Util.Beans.Objects.To_String (Value), Doc);
if not Is_Text then
declare
Html : aliased Html_Writer_Type;
Renderer : aliased Wiki.Render.Html.Html_Renderer;
begin
Html.Writer := Writer;
if Links /= null then
Renderer.Set_Link_Renderer (Links);
end if;
Renderer.Set_Output_Stream (Html'Unchecked_Access);
Renderer.Set_Render_TOC (UI.Get_Attribute (TOC_NAME, Context, False));
Renderer.Render (Doc);
end;
else
declare
Html : aliased Html_Writer_Type;
Renderer : aliased Wiki.Render.Text.Text_Renderer;
begin
Html.Writer := Writer;
Renderer.Set_Output_Stream (Html'Unchecked_Access);
Renderer.Render (Doc);
end;
end if;
end if;
if not Is_Text then
Writer.End_Element ("div");
end if;
end;
end Encode_Begin;
-- ------------------------------
-- Get the value identified by the name.
-- ------------------------------
overriding
function Get_Value (From : in Link_Renderer_Bean;
Name : in String) return Util.Beans.Objects.Object is
begin
if Name = IMAGE_PREFIX_ATTR then
return Util.Beans.Objects.To_Object (From.Image_Prefix);
elsif Name = PAGE_PREFIX_ATTR then
return Util.Beans.Objects.To_Object (From.Page_Prefix);
else
return Util.Beans.Objects.Null_Object;
end if;
end Get_Value;
-- ------------------------------
-- Set the value identified by the name.
-- ------------------------------
overriding
procedure Set_Value (From : in out Link_Renderer_Bean;
Name : in String;
Value : in Util.Beans.Objects.Object) is
begin
if Name = IMAGE_PREFIX_ATTR then
From.Image_Prefix := Util.Beans.Objects.To_Unbounded_Wide_Wide_String (Value);
elsif Name = PAGE_PREFIX_ATTR then
From.Page_Prefix := Util.Beans.Objects.To_Unbounded_Wide_Wide_String (Value);
end if;
end Set_Value;
function Starts_With (Content : in Unbounded_Wide_Wide_String;
Item : in String) return Boolean is
use Ada.Characters.Conversions;
Pos : Positive := 1;
begin
if Length (Content) < Item'Length then
return False;
end if;
for I in Item'Range loop
if Item (I) /= To_Character (Element (Content, Pos)) then
return False;
end if;
Pos := Pos + 1;
end loop;
return True;
end Starts_With;
procedure Make_Link (Renderer : in Link_Renderer_Bean;
Link : in Wiki.Strings.WString;
Prefix : in Unbounded_Wide_Wide_String;
URI : out Unbounded_Wide_Wide_String) is
pragma Unreferenced (Renderer);
begin
if Wiki.Helpers.Is_Url (Link) then
URI := To_Unbounded_Wide_Wide_String (Link);
else
URI := Prefix & Link;
end if;
end Make_Link;
-- ------------------------------
-- Get the image link that must be rendered from the wiki image link.
-- ------------------------------
overriding
procedure Make_Image_Link (Renderer : in out Link_Renderer_Bean;
Link : in Wiki.Strings.WString;
URI : out Unbounded_Wide_Wide_String;
Width : in out Natural;
Height : in out Natural) is
begin
Renderer.Make_Link (Link, Renderer.Image_Prefix, URI);
Width := 0;
Height := 0;
end Make_Image_Link;
-- ------------------------------
-- Get the page link that must be rendered from the wiki page link.
-- ------------------------------
overriding
procedure Make_Page_Link (Renderer : in out Link_Renderer_Bean;
Link : in Wiki.Strings.WString;
URI : out Unbounded_Wide_Wide_String;
Exists : out Boolean) is
begin
Renderer.Make_Link (Link, Renderer.Page_Prefix, URI);
Exists := True;
end Make_Page_Link;
begin
ASF.Utils.Set_Text_Attributes (WIKI_ATTRIBUTE_NAMES);
end AWA.Components.Wikis;
|