Html.Document

Unit
Source
Symbols

Symbol	Description
stTextJavascript	Javascript script
THtmlArea	Represents an area on a image map
THtmlBase	Base URI for resolving relative URIs in the document
THtmlBody	Main content of the document
THtmlComment	Represents an HTML comments embedded in the HTML document
THtmlDocument	Entire Html document, including `THtmlDocumentType` and HTML content
THtmlDocumentType	`Document type declaration` for HTML documents
THtmlEmbed	Integration point for external (non-HTML) application or interactive content
THtmlHead	HTML Header information
THtmlHtml	HTML Document root element
THtmlIframe	Contect for nested browsing
THtmlImage	Image embedded within an HTML document
THtmlLink	Link to external document to be included as a resource in this document
THtmlMap	Root node for an image map, containing `THtmlArea`a
THtmlMeta	Element containing document meta data
THtmlMetaCharSet
THtmlMetaHttpEquivalent
THtmlMetaName
THtmlObject	Element representing an external resource included in the document
THtmlParam	Defines parameters for plugins associated with `THtmlObject`s
THtmlScript	Dynamic script included in the document, either as external resource or embedded in the element itself
THtmlStyle	Style definition included in the document, either as external resource or embedded in the element itself
THtmlSvg	Element representing a `TSvgDocument`.
THtmlTitle	Title of the HTML document
TScriptType	HTML script type
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///////////////////////////////////////////////////////////////////////////
//                                                                       //
//  Copyright (c) 2015 by Charta Software B.V.                           //
//  All rights reserved                                                  //
//                                                                       //
//  Version:  1.7.0.83525                                                //
//  Web site: https://pascal.chartasoftware.com/                         //
//                                                                       //
//  This code and information are provided "as is" without warranty of   //
//  any kind. Dissemination of this information or reproduction of       //
//  this material is strictly forbidden unless prior written permission  //
//  is obtained from Charta Software B.V..                               //
//                                                                       //
///////////////////////////////////////////////////////////////////////////

unit Html.Document;

interface

uses
  Boolean,
  Character.Encoding,
  Geometry._2d.Integer32.Rectangle,
  Geometry._2d.Integer32.Size,
  Html.Attribute,
  Html.Element,
  Html.Element.Container,
  Html.Element.Stylable,
  Image.Vector.Svg.Document,
  Integer._32,
  Internet.MediaType,
  Text,
  Text.List,
  Uri;

type
  THtmlDocumentType = class(THtmlElement)
  public
    PublicId: TText;
    SystemId: TUri;

    constructor Create(const PublicId: TText; const SystemId: TUri); reintroduce; virtual;
  end;

  THtmlHead = class(THtmlContainerElement)
  end;

  THtmlHtml = class(THtmlElement)
  private
    FHead: THtmlHead;
    FBody: THtmlContainerElement;

  public
    constructor Create(); override;
    destructor  Destroy(); override;

    procedure   AddAttributes(Attributes: THtmlAttributes); override;

    property    Head: THtmlHead read FHead;
    property    Body: THtmlContainerElement read FBody;
  end;

  THtmlDocument = class(THtmlElement)
  private
    FDocumentType: THtmlDocumentType;
    FHtml:         THtmlHtml;
    procedure SetDocumentType(const Value: THtmlDocumentType);

  public
    constructor Create(); override;
    destructor  Destroy(); override;

    property    DocumentType: THtmlDocumentType read FDocumentType write SetDocumentType;
    property    Html: THtmlHtml read FHtml;
  end;

  THtmlTitle = class(THtmlContainerElement)
  end;

  THtmlMeta = class(THtmlElement)
  end;

  THtmlMetaName = class(THtmlMeta)
  public
    Name:    TText;
    Content: TText;

    constructor Create(const Name: TText; const Content: TText); reintroduce; virtual;
    
    procedure   AddAttributes(Attributes: THtmlAttributes); override;
  end;

  THtmlMetaHttpEquivalent = class(THtmlMeta)
  public
    HttpEquivalent: TText;
    Content:        TText;

    constructor Create(const HttpEquivalent: TText; const Content: TText); reintroduce; virtual;
    
    procedure   AddAttributes(Attributes: THtmlAttributes); override;
  end;

  THtmlMetaCharSet = class(THtmlMeta)
  public
    CharSet: TCharacterEncoding;

    constructor Create(const CharSet: TCharacterEncoding); reintroduce; virtual;
    
    procedure   AddAttributes(Attributes: THtmlAttributes); override;
  end;

  THtmlBase = class(THtmlElement)
  public
    HRef: TUri;

    procedure   AddAttributes(Attributes: THtmlAttributes); override;
  end;

  THtmlStyle = class(THtmlElement)
  private
    FContentType: TMediaType;

    procedure   SetContentType(const Value: TMediaType);

  public
    Contents: TTextList;

    constructor Create(); override;
    destructor  Destroy(); override;

    procedure   AddAttributes(Attributes: THtmlAttributes); override;

    property    ContentType: TMediaType read FContentType write SetContentType;
  end;

  THtmlBody = class(THtmlContainerElement)
  end;

  THtmlLink = class(THtmlElement)
  private
    FContentType: TMediaType;

    procedure   SetContentType(const Value: TMediaType);

  public
    Rel:   TText;
    Title: TText;
    HRef:  TUri;

    destructor  Destroy(); override;

    procedure   AddAttributes(Attributes: THtmlAttributes); override;

    property    ContentType: TMediaType read FContentType write SetContentType;
  end;

  THtmlImage = class(THtmlStylableElement)
  public
    Source:          TUri;
    AlternativeText: TText;
    Title:           TText;
    UseMap:          TText;
    Size:            TInteger32Size;

    constructor Create(); override;

    procedure   AddAttributes(Attributes: THtmlAttributes); override;
  end;

  THtmlObject = class(THtmlContainerElement)
  private
    FContentType: TMediaType;

    procedure   SetContentType(const Value: TMediaType);

  public
    ClassID:  TText;
    Data:     TUri;
    CodeBase: TUri;

    destructor  Destroy(); override;

    procedure   AddAttributes(Attributes: THtmlAttributes); override;

    property    ContentType: TMediaType read FContentType write SetContentType;
  end;

  THtmlParam = class(THtmlStylableElement)
  public
    Value: TText;

    procedure   AddAttributes(Attributes: THtmlAttributes); override;
  end;

  THtmlEmbed = class(THtmlStylableElement)
  private
    FContentType: TMediaType;

    procedure   SetContentType(const Value: TMediaType);

  public
    PluginsPage:   TUri;
    Source:        TUri;
    Quality:       TText;
    Loop:          TBoolean;
    ShowControls:  TBoolean;
    ShowStatusBar: TBoolean;
    ShowDisplay:   TBoolean;
    AutoStart:     TBoolean;
    Size:          TInteger32Size;
    WMode:         TText;

    destructor  Destroy(); override;

    procedure   AddAttributes(Attributes: THtmlAttributes); override;

    property    ContentType: TMediaType read FContentType write SetContentType;
  end;

  THtmlIframe = class(THtmlContainerElement)
  public
    Source: TUri;

    procedure   AddAttributes(Attributes: THtmlAttributes); override;
  end;

  THtmlMap = class(THtmlContainerElement)
  end;

  THtmlArea = class(THtmlContainerElement)
  public
    AccessKey:       TText;
    AlternativeText: TText;
    Coordinates:     TInteger32Rectangle;
    HRef:            TUri;
    TabIndex:        TInteger32;
    Target:          TText;

    procedure   AddAttributes(Attributes: THtmlAttributes); override;
  end;

  TScriptType = (stTextJavascript);

  THtmlScript = class(THtmlElement)
  protected
    function    ScriptTypeToText(ScriptType: TScriptType): TText;

  public
    ScriptType: TScriptType;
    Source:     TUri;
    Lines:      TTextList;

    constructor Create(); override;
    destructor  Destroy(); override;

    procedure   AddAttributes(Attributes: THtmlAttributes); override;
  end;

  THtmlComment = class(THtmlElement)
  public
    Lines: TTextList;

    constructor Create(); override;
    destructor  Destroy(); override;
  end;

  THtmlSvg = class(THtmlElement)
  protected
    FDocument: TSvgDocument;

    procedure   SetDocument(Value: TSvgDocument);

  public
    destructor  Destroy(); override;

    property    Document: TSvgDocument read FDocument write SetDocument;
  end;

implementation

uses
  Exception,
  Integer._32.TextFormat;

{ THtmlImage }

procedure THtmlImage.AddAttributes(Attributes: THtmlAttributes);
begin
  inherited AddAttributes(Attributes);

  Attributes.AddRequired('src', Source.ToText());
  Attributes.AddOptional('alt', AlternativeText);
  Attributes.AddOptional('title', Title);
  Attributes.AddOptional('usemap', UseMap);
  Attributes.AddOptional('width', Size.Width, -1);
  Attributes.AddOptional('height', Size.Height,  -1);
end;

constructor THtmlImage.Create();
begin
  inherited Create();

  Size := TInteger32Size.New(-1, -1);
end;

{ THtmlIFrame }

procedure THtmlIframe.AddAttributes(Attributes: THtmlAttributes);
begin
  inherited AddAttributes(Attributes);

  Attributes.AddRequired('src', Source);
end;

{ THtmlObject }

procedure THtmlObject.AddAttributes(Attributes: THtmlAttributes);
begin
  inherited AddAttributes(Attributes);

  Attributes.AddOptional('classid', ClassID);
  Attributes.AddOptional('codebase', CodeBase.ToText());
  Attributes.AddOptional('data', Data.ToText());
  Attributes.AddOptional('type', ContentType);
end;

destructor THtmlObject.Destroy();
begin
  ContentType.ReleaseReference();

  inherited Destroy();
end;

procedure THtmlObject.SetContentType(const Value: TMediaType);
begin
  if Value <> ContentType then
  begin
    Value.AddReference();
    ContentType.ReleaseReference();

    FContentType := Value;
  end;
end;

{ THtmlParam }

procedure THtmlParam.AddAttributes(Attributes: THtmlAttributes);
begin
  inherited AddAttributes(Attributes);

  Attributes.AddRequired('value', Value);
end;

{ THtmlEmbed }

procedure THtmlEmbed.AddAttributes(Attributes: THtmlAttributes);
begin
  inherited AddAttributes(Attributes);

  Attributes.AddRequired('src', Source.ToText());
  Attributes.AddOptional('type', ContentType);
  Attributes.AddOptional('width', Size.Width);
  Attributes.AddOptional('height', Size.Height);
  Attributes.AddOptional('pluginspage', PluginsPage.ToText());
  Attributes.AddOptional('quality', Quality);
  Attributes.AddOptional('loop', Loop);
  Attributes.AddOptional('showcontrols', ShowControls);
  Attributes.AddOptional('ShowstatusBar', ShowStatusBar);
  Attributes.AddOptional('Showdisplay', ShowDisplay);
  Attributes.AddOptional('autostart', AutoStart, True);
  Attributes.AddOptional('wmode', WMode);
end;

destructor THtmlEmbed.Destroy();
begin
  ContentType.ReleaseReference();

  inherited Destroy();
end;

procedure THtmlEmbed.SetContentType(const Value: TMediaType);
begin
  if Value <> ContentType then
  begin
    Value.AddReference();
    ContentType.ReleaseReference();

    FContentType := Value;
  end;
end;

{ THtmlArea }

procedure THtmlArea.AddAttributes(Attributes: THtmlAttributes);
begin
  inherited AddAttributes(Attributes);

  if HRef.IsEmpty then
    Attributes.AddRequired('nohref', 'on')
  else
    Attributes.AddRequired('href', HRef.ToText());

  Attributes.AddOptional('acceskey', AccessKey);
  Attributes.AddOptional('alt', AlternativeText);
  Attributes.AddRequired('coords', RectangleToCoordinates(Coordinates));
  Attributes.AddRequired('shape', 'rect');
  Attributes.AddOptional('tabindex', Integer32ToText(TabIndex));
  Attributes.AddOptional('target', Target);
end;

{ THtmlScript }

procedure THtmlScript.AddAttributes(Attributes: THtmlAttributes);
begin
  inherited AddAttributes(Attributes);

  Attributes.AddRequired('type', ScriptTypeToText(ScriptType));
  Attributes.AddOptional('src', Source.ToText());
end;

constructor THtmlScript.Create();
begin
  inherited Create();

  Lines := TTextList.Create();
end;

destructor THtmlScript.Destroy();
begin
  Lines.Free();

  inherited Destroy();
end;

function THtmlScript.ScriptTypeToText(ScriptType: TScriptType): TText;
begin
  case ScriptType of
    stTextJavascript: Result := 'text/javascript';
  else
    raise EException.Create('Unknown script type');
  end;
end;

{ THtmlLink }

procedure THtmlLink.AddAttributes(Attributes: THtmlAttributes);
begin
  inherited AddAttributes(Attributes);

  Attributes.AddOptional('rel', Rel);
  Attributes.AddOptional('title', Title);
  Attributes.AddOptional('type', ContentType);
  Attributes.AddOptional('href', HRef.ToText());
end;

destructor THtmlLink.Destroy();
begin
  ContentType.ReleaseReference();

  inherited Destroy();
end;

procedure THtmlLink.SetContentType(const Value: TMediaType);
begin
  if Value <> ContentType then
  begin
    Value.AddReference();
    ContentType.ReleaseReference();

    FContentType := Value;
  end;
end;

{ THtmlHtml }

procedure THtmlHtml.AddAttributes(Attributes: THtmlAttributes);
begin
  inherited AddAttributes(Attributes);

  Attributes.AddRequired('xmlns', 'http://www.w3.org/1999/xhtml');
end;

constructor THtmlHtml.Create();
begin
  inherited Create();

  FHead := THtmlHead.Create();
  FHead.AddReference();

  FBody := THtmlContainerElement.Create();
  FBody.AddReference();
end;

destructor THtmlHtml.Destroy();
begin
  Head.ReleaseReference();
  Body.ReleaseReference();

  inherited Destroy();
end;

{ THtmlDocument }

constructor THtmlDocument.Create();
begin
  inherited Create();

  FHtml := THtmlHtml.Create();
  FHtml.AddReference();
end;

destructor THtmlDocument.Destroy();
begin
  DocumentType.ReleaseReference();
  Html.ReleaseReference();

  inherited Destroy();
end;

procedure THtmlDocument.SetDocumentType(const Value: THtmlDocumentType);
begin
  if Value <> DocumentType then
  begin
    Value.AddReference();
    DocumentType.ReleaseReference();

    FDocumentType := Value;
  end;
end;

{ THtmlDocumentType }

constructor THtmlDocumentType.Create(const PublicId: TText; const SystemId: TUri);
begin
  inherited Create();

  Self.PublicId := PublicId;
  Self.SystemId := SystemId;
end;

{ THtmlComment }

constructor THtmlComment.Create();
begin
  inherited Create();

  Lines := TTextList.Create();
end;

destructor THtmlComment.Destroy();
begin
  Lines.Free();

  inherited Destroy();
end;

{ THtmlBase }

procedure THtmlBase.AddAttributes(Attributes: THtmlAttributes);
begin
  inherited AddAttributes(Attributes);
  
  Attributes.AddRequired('href', HRef.ToText());
end;

{ THtmlStyle }

procedure THtmlStyle.AddAttributes(Attributes: THtmlAttributes);
begin
  inherited AddAttributes(Attributes);

  Attributes.AddRequired('type', ContentType);
end;

constructor THtmlStyle.Create();
begin
  inherited Create();

  Contents := TTextList.Create();
end;

destructor THtmlStyle.Destroy();
begin
  Contents.Free();
  ContentType.ReleaseReference();

  inherited Destroy();
end;

procedure THtmlStyle.SetContentType(const Value: TMediaType);
begin
  if Value <> ContentType then
  begin
    Value.AddReference();
    ContentType.ReleaseReference();

    FContentType := Value;
  end;
end;

{ THtmlMetaName }

procedure THtmlMetaName.AddAttributes(Attributes: THtmlAttributes);
begin
  inherited AddAttributes(Attributes);

  Attributes.AddRequired('name', Name);
  Attributes.AddRequired('content', Content);
end;

constructor THtmlMetaName.Create(const Name: TText; const Content: TText);
begin
  inherited Create();

  Self.Name    := Name;
  Self.Content := Content;
end;

{ THtmlMetaHttpEquivalent }

procedure THtmlMetaHttpEquivalent.AddAttributes(Attributes: THtmlAttributes);
begin
  inherited AddAttributes(Attributes);

  Attributes.AddRequired('http-equiv', HttpEquivalent);
  Attributes.AddRequired('content', Content);
end;

constructor THtmlMetaHttpEquivalent.Create(const HttpEquivalent: TText; const Content: TText);
begin
  inherited Create();

  Self.HttpEquivalent := HttpEquivalent;
  Self.Content        := Content;
end;

{ THtmlMetaCharSet }

procedure THtmlMetaCharSet.AddAttributes(Attributes: THtmlAttributes);
begin
  inherited AddAttributes(Attributes);

  Attributes.AddRequired('charset', CharSet.Identifier);
end;

constructor THtmlMetaCharSet.Create(const CharSet: TCharacterEncoding);
begin
  inherited Create();

  Self.CharSet := CharSet;
end;

{ THtmlSvg }

destructor THtmlSvg.Destroy();
begin
  Document.ReleaseReference();

  inherited Destroy();
end;

procedure THtmlSvg.SetDocument(Value: TSvgDocument);
begin
  if Value <> Document then
  begin
    Value.AddReference();
    Document.ReleaseReference();

    FDocument := Value;
  end;
end;

end.