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469 | -----------------------------------------------------------------------
-- wiki-nodes -- Wiki Document Internal representation
-- Copyright (C) 2016, 2019, 2020, 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 Ada.Wide_Wide_Characters.Handling;
package body Wiki.Documents is
use Wiki.Nodes;
use Wiki.Nodes.Lists;
-- ------------------------------
-- Append a HTML tag start node to the document.
-- ------------------------------
procedure Start_Block (Into : in out Document;
Kind : in Wiki.Nodes.Node_Kind;
Level : in Natural) is
Node : Node_Type_Access;
begin
case Kind is
when N_HEADER =>
Node := new Node_Type '(Kind => N_HEADER,
Len => 0,
Level => Level,
Content => null,
Parent => Into.Current);
when others =>
return;
end case;
Append (Into, Node);
Into.Current := Node;
end Start_Block;
procedure End_Block (From : in out Document;
Kind : in Wiki.Nodes.Node_Kind) is
pragma Unreferenced (Kind);
begin
if From.Current /= null then
From.Current := From.Current.Parent;
end if;
end End_Block;
-- ------------------------------
-- Append a HTML tag start node to the document.
-- ------------------------------
procedure Push_Node (Into : in out Document;
Tag : in Html_Tag;
Attributes : in Wiki.Attributes.Attribute_List) is
Node : constant Node_Type_Access := new Node_Type '(Kind => N_TAG_START,
Len => 0,
Tag_Start => Tag,
Attributes => Attributes,
Children => null,
Parent => Into.Current);
begin
Append (Into, Node);
Into.Current := Node;
end Push_Node;
-- ------------------------------
-- Pop the HTML tag.
-- ------------------------------
procedure Pop_Node (From : in out Document;
Tag : in Html_Tag) is
pragma Unreferenced (Tag);
begin
if From.Current /= null then
From.Current := From.Current.Parent;
end if;
end Pop_Node;
-- ------------------------------
-- Returns True if the current node is the root document node.
-- ------------------------------
function Is_Root_Node (Doc : in Document) return Boolean is
begin
return Doc.Current = null;
end Is_Root_Node;
-- ------------------------------
-- Append a node to the document.
-- ------------------------------
procedure Append (Into : in out Document;
Node : in Wiki.Nodes.Node_Type_Access) is
begin
if Into.Current = null then
Append (Into.Nodes, Node);
else
Append (Into.Current, Node);
end if;
end Append;
-- ------------------------------
-- Append a simple node such as N_LINE_BREAK, N_HORIZONTAL_RULE or N_PARAGRAPH.
-- ------------------------------
procedure Append (Into : in out Document;
Kind : in Simple_Node_Kind) is
begin
case Kind is
when N_LINE_BREAK =>
Append (Into, new Node_Type '(Kind => N_LINE_BREAK, Len => 0,
Parent => Into.Current));
when N_HORIZONTAL_RULE =>
Append (Into, new Node_Type '(Kind => N_HORIZONTAL_RULE, Len => 0,
Parent => Into.Current));
when N_PARAGRAPH =>
Append (Into, new Node_Type '(Kind => N_PARAGRAPH, Len => 0,
Parent => Into.Current));
when N_LIST_ITEM =>
Append (Into, new Node_Type '(Kind => N_LIST_ITEM, Len => 0,
Parent => Into.Current));
when N_LIST_END =>
Append (Into, new Node_Type '(Kind => N_LIST_END, Len => 0,
Parent => Into.Current));
when N_NUM_LIST_END =>
Append (Into, new Node_Type '(Kind => N_NUM_LIST_END, Len => 0,
Parent => Into.Current));
when N_LIST_ITEM_END =>
Append (Into, new Node_Type '(Kind => N_LIST_ITEM_END, Len => 0,
Parent => Into.Current));
when N_NEWLINE =>
Append (Into, new Node_Type '(Kind => N_NEWLINE, Len => 0,
Parent => Into.Current));
when N_END_DEFINITION =>
Append (Into, new Node_Type '(Kind => N_END_DEFINITION, Len => 0,
Parent => Into.Current));
when N_TOC_DISPLAY =>
Append (Into, new Node_Type '(Kind => N_TOC_DISPLAY, Len => 0,
Parent => Into.Current));
Into.Using_TOC := True;
when N_NONE =>
null;
end case;
end Append;
-- ------------------------------
-- Append the text with the given format at end of the document.
-- ------------------------------
procedure Append (Into : in out Document;
Text : in Wiki.Strings.WString;
Format : in Format_Map) is
begin
Append (Into, new Node_Type '(Kind => N_TEXT, Len => Text'Length,
Parent => Into.Current,
Text => Text, Format => Format));
end Append;
-- ------------------------------
-- Add a definition item at end of the document.
-- ------------------------------
procedure Add_Definition (Into : in out Document;
Definition : in Wiki.Strings.WString) is
begin
-- Append (Into, new Node_Type '(Kind => N_DEFINITION,
-- Len => Definition'Length,
-- Parent => Into.Current,
-- Header => Definition,
-- Level => 0));
null;
end Add_Definition;
-- ------------------------------
-- Add a link.
-- ------------------------------
procedure Add_Link (Into : in out Document;
Name : in Wiki.Strings.WString;
Attributes : in out Wiki.Attributes.Attribute_List) is
begin
Append (Into, new Node_Type '(Kind => N_LINK, Len => Name'Length,
Parent => Into.Current,
Title => Name, Link_Attr => Attributes));
end Add_Link;
-- ------------------------------
-- Add a link reference with the given label.
-- ------------------------------
procedure Add_Link_Ref (Into : in out Document;
Label : in Wiki.Strings.WString) is
begin
Append (Into, new Node_Type '(Kind => N_LINK_REF, Len => Label'Length,
Parent => Into.Current,
Title => Label, others => <>));
end Add_Link_Ref;
-- ------------------------------
-- Add an image.
-- ------------------------------
procedure Add_Image (Into : in out Document;
Name : in Wiki.Strings.WString;
Attributes : in out Wiki.Attributes.Attribute_List) is
begin
Append (Into, new Node_Type '(Kind => N_IMAGE, Len => Name'Length,
Parent => Into.Current,
Title => Name, Link_Attr => Attributes));
end Add_Image;
-- ------------------------------
-- Add a quote.
-- ------------------------------
procedure Add_Quote (Into : in out Document;
Name : in Wiki.Strings.WString;
Attributes : in out Wiki.Attributes.Attribute_List) is
begin
Append (Into, new Node_Type '(Kind => N_QUOTE, Len => Name'Length,
Parent => Into.Current,
Title => Name, Link_Attr => Attributes));
end Add_Quote;
-- ------------------------------
-- Add a list (<ul> or <ol>) starting at the given number.
-- ------------------------------
procedure Add_List (Into : in out Document;
Level : in Natural;
Ordered : in Boolean) is
begin
if Ordered then
Append (Into, new Node_Type '(Kind => N_NUM_LIST_START, Len => 0,
Parent => Into.Current,
Level => Level, others => <>));
else
Append (Into, new Node_Type '(Kind => N_LIST_START, Len => 0,
Parent => Into.Current,
Level => Level, others => <>));
end if;
end Add_List;
-- ------------------------------
-- Add a blockquote (<blockquote>). The level indicates the blockquote nested level.
-- The blockquote must be closed at the next header.
-- ------------------------------
procedure Add_Blockquote (Into : in out Document;
Level : in Natural) is
begin
Append (Into, new Node_Type '(Kind => N_BLOCKQUOTE, Len => 0,
Parent => Into.Current,
Level => Level, others => <>));
end Add_Blockquote;
-- ------------------------------
-- Add a text block that is pre-formatted.
-- ------------------------------
procedure Add_Preformatted (Into : in out Document;
Text : in Wiki.Strings.WString;
Format : in Wiki.Strings.WString) is
begin
Append (Into, new Node_Type '(Kind => N_PREFORMAT, Len => Text'Length,
Parent => Into.Current,
Preformatted => Text,
Language => Strings.To_UString (Format)));
end Add_Preformatted;
-- ------------------------------
-- Add a new row to the current table.
-- ------------------------------
procedure Add_Row (Into : in out Document) is
Table : Node_Type_Access;
Row : Node_Type_Access;
begin
-- Identify the current table.
Table := Into.Current;
while Table /= null and then Table.Kind /= N_TABLE loop
Table := Table.Parent;
end loop;
-- Create the current table.
if Table = null then
Table := new Node_Type '(Kind => N_TABLE,
Len => 0,
Tag_Start => TABLE_TAG,
Children => null,
Parent => Into.Current,
others => <>);
Append (Into, Table);
end if;
-- Add the row.
Row := new Node_Type '(Kind => N_ROW,
Len => 0,
Tag_Start => TR_TAG,
Children => null,
Parent => Table,
others => <>);
Append (Table, Row);
Into.Current := Row;
end Add_Row;
-- ------------------------------
-- Add a column to the current table row. The column is configured with the
-- given attributes. The column content is provided through calls to Append.
-- ------------------------------
procedure Add_Column (Into : in out Document;
Attributes : in out Wiki.Attributes.Attribute_List) is
Row : Node_Type_Access;
Col : Node_Type_Access;
begin
-- Identify the current row.
Row := Into.Current;
while Row /= null and then Row.Kind /= N_ROW loop
Row := Row.Parent;
end loop;
-- Add the new column.
Col := new Node_Type '(Kind => N_COLUMN,
Len => 0,
Tag_Start => TD_TAG,
Children => null,
Parent => Row,
Attributes => Attributes);
Append (Row, Col);
Into.Current := Col;
end Add_Column;
-- ------------------------------
-- Finish the creation of the table.
-- ------------------------------
procedure Finish_Table (Into : in out Document) is
Table : Node_Type_Access;
begin
-- Identify the current table.
Table := Into.Current;
while Table /= null and then Table.Kind /= N_TABLE loop
Table := Table.Parent;
end loop;
if Table /= null then
Into.Current := Table.Parent;
else
Into.Current := null;
end if;
end Finish_Table;
-- ------------------------------
-- Iterate over the nodes of the list and call the <tt>Process</tt> procedure with
-- each node instance.
-- ------------------------------
procedure Iterate (Doc : in Document;
Process : not null access procedure (Node : in Node_Type)) is
begin
Iterate (Doc.Nodes, Process);
end Iterate;
-- ------------------------------
-- Returns True if the document is empty.
-- ------------------------------
function Is_Empty (Doc : in Document) return Boolean is
begin
return Wiki.Nodes.Lists.Is_Empty (Doc.Nodes);
end Is_Empty;
-- ------------------------------
-- Returns True if the document displays the table of contents by itself.
-- ------------------------------
function Is_Using_TOC (Doc : in Document) return Boolean is
begin
return Doc.Using_TOC;
end Is_Using_TOC;
-- ------------------------------
-- Returns True if the table of contents is visible and must be rendered.
-- ------------------------------
function Is_Visible_TOC (Doc : in Document) return Boolean is
begin
return Doc.Visible_TOC;
end Is_Visible_TOC;
-- ------------------------------
-- Hide the table of contents.
-- ------------------------------
procedure Hide_TOC (Doc : in out Document) is
begin
Doc.Visible_TOC := False;
end Hide_TOC;
-- ------------------------------
-- Get the table of content node associated with the document.
-- ------------------------------
procedure Get_TOC (Doc : in out Document;
TOC : out Wiki.Nodes.Lists.Node_List_Ref) is
begin
if Wiki.Nodes.Lists.Is_Empty (Doc.TOC) then
Append (Doc.TOC, new Node_Type '(Kind => N_TOC, Len => 0, others => <>));
end if;
TOC := Doc.TOC;
end Get_TOC;
-- ------------------------------
-- Get the table of content node associated with the document.
-- ------------------------------
function Get_TOC (Doc : in Document) return Wiki.Nodes.Lists.Node_List_Ref is
begin
return Doc.TOC;
end Get_TOC;
-- ------------------------------
-- Set a link definition.
-- ------------------------------
procedure Set_Link (Doc : in out Document;
Name : in Wiki.Strings.WString;
Link : in Wiki.Strings.WString;
Title : in Wiki.Strings.WString) is
Upper : constant Wiki.Strings.WString
:= Ada.Wide_Wide_Characters.Handling.To_Upper (Name);
begin
if not Doc.Links.Contains (Upper) then
Doc.Links.Include (Upper, Link);
if Title'Length > 0 then
Doc.Titles.Include (Upper, Title);
end if;
end if;
end Set_Link;
-- ------------------------------
-- Get a link definition.
-- ------------------------------
function Get_Link (Doc : in Document;
Label : in Wiki.Strings.WString) return Wiki.Strings.WString is
Upper : constant Wiki.Strings.WString
:= Ada.Wide_Wide_Characters.Handling.To_Upper (Label);
Pos : constant Wiki.Strings.Maps.Cursor := Doc.Links.Find (Upper);
begin
if Wiki.Strings.Maps.Has_Element (Pos) then
return Wiki.Strings.Maps.Element (Pos);
else
return "";
end if;
end Get_Link;
-- ------------------------------
-- Get a link definition.
-- ------------------------------
function Get_Link_Title (Doc : in Document;
Label : in Wiki.Strings.WString) return Wiki.Strings.WString is
Upper : constant Wiki.Strings.WString
:= Ada.Wide_Wide_Characters.Handling.To_Upper (Label);
Pos : constant Wiki.Strings.Maps.Cursor := Doc.Titles.Find (Upper);
begin
if Wiki.Strings.Maps.Has_Element (Pos) then
return Wiki.Strings.Maps.Element (Pos);
else
return "";
end if;
end Get_Link_Title;
end Wiki.Documents;
|