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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.Writer;
interface
uses
Boolean,
Collection.List,
Collection.Map,
Html.Document,
Html.Element,
Html.Element.Block,
Html.Element.Block.Form,
Html.Element.Block.List,
Html.Element.Block.Table,
Html.Element.Container,
Html.Element.Inline_,
Memory.Pointer,
Text,
Visitor.MapBased,
Xml.Writer;
type
THtmlDocumentWriter = class(TMapBasedVisitor)
protected
Writer: TXmlWriter;
function GetMethodAddress(Prefix: TText; Value: TObject; Suffix: TText): TPointer; override;
procedure WriteTableBodies(Bodies: TList<THtmlTableBody>);
procedure WriteListItems(Items: TList<THtmlListItem>);
procedure WriteElements(Elements: THtmlElementList);
procedure WriteStart(Tag: TText; Element: THtmlElement);
procedure WriteEnd(EndTag: TXmlEndTag = TXmlEndTag.Always);
procedure WriteClosed(Tag: TText; Element: THtmlElement);
procedure WriteContainerElement(Tag: TText; ContainerElement: THtmlContainerElement);
procedure WriteAttributes(Element: THtmlElement);
published
procedure WriteHtmlDocumentType(DocumentType: THtmlDocumentType); virtual;
procedure WriteHtmlHead(Head: THtmlHead); virtual;
procedure WriteHtmlTitle(Title: THtmlTitle); virtual;
procedure WriteHtmlBase(Base: THtmlBase); virtual;
procedure WriteHtmlStyle(Style: THtmlStyle); virtual;
procedure WriteHtmlMetaName(Meta: THtmlMetaName); virtual;
procedure WriteHtmlMetaHttpEquivalent(Meta: THtmlMetaHttpEquivalent); virtual;
procedure WriteHtmlMetaCharSet(Meta: THtmlMetaCharSet); virtual;
procedure WriteHtmlBody(Body: THtmlBody); virtual;
procedure WriteHtmlHtml(Html: THtmlHtml); virtual;
procedure WriteHtmlDocument(Document: THtmlDocument); virtual;
procedure WriteHtmlText(Text: THtmlText); virtual;
procedure WriteHtmlCharacterEntity(CharacterEntity: THtmlCharacterEntity); virtual;
procedure WriteHtmlCharacterReference(CharacterReference: THtmlCharacterReference); virtual;
procedure WriteHtmlFieldSet(FieldSet: THtmlFieldSet); virtual;
procedure WriteHtmlDivision(Division: THtmlDivision); virtual;
procedure WriteHtmlLegend(Legend: THtmlLegend); virtual;
procedure WriteHtmlParagraph(Paragraph: THtmlParagraph); virtual;
procedure WriteHtmlBlockQuote(BlockQuote: THtmlBlockQuote); virtual;
procedure WriteHtmlHeading(Heading: THtmlHeading); virtual;
procedure WriteHtmlLineBreak(LineBreak: THtmlLineBreak); virtual;
procedure WriteHtmlHorizontalRuler(HorizontalRuler: THtmlHorizontalRuler); virtual;
procedure WriteHtmlBold(Bold: THtmlBold); virtual;
procedure WriteHtmlItalics(Italics: THtmlItalics); virtual;
procedure WriteHtmlUnderline(Underline: THtmlUnderline); virtual;
procedure WriteHtmlEmphasize(Emphasize: THtmlEmphasize); virtual;
procedure WriteHtmlSubscript(Subscript: THtmlSubscript); virtual;
procedure WriteHtmlSuperscript(Superscript: THtmlSuperscript); virtual;
procedure WriteHtmlPreformatted(Preformatted: THtmlPreformatted); virtual;
procedure WriteHtmlCode(Code: THtmlCode); virtual;
procedure WriteHtmlLink(Link: THtmlLink); virtual;
procedure WriteHtmlAnchor(Anchor: THtmlAnchor); virtual;
procedure WriteHtmlImage(Image: THtmlImage); virtual;
procedure WriteHtmlTableCell(Cell: THtmlTableCell); virtual;
procedure WriteHtmlTableRow(Row: THtmlTableRow); virtual;
procedure WriteHtmlTableBody(Body: THtmlTableBody); virtual;
procedure WriteHtmlTable(Table: THtmlTable); virtual;
procedure WriteHtmlListItem(ListItem: THtmlListItem); virtual;
procedure WriteHtmlList(List: THtmlList); virtual;
procedure WriteHtmlForm(Form: THtmlForm); virtual;
procedure WriteHtmlInput(Input: THtmlInput); virtual;
procedure WriteHtmlButton(Button: THtmlButton); virtual;
procedure WriteHtmlLabel(Label_: THtmlLabel); virtual;
procedure WriteHtmlOption(Option: THtmlOption); virtual;
procedure WriteHtmlSelect(Select: THtmlSelect); virtual;
procedure WriteHtmlTextArea(TextArea: THtmlTextArea); virtual;
procedure WriteHtmlIframe(IFrame: THtmlIframe); virtual;
procedure WriteHtmlObject(Object_: THtmlObject); virtual;
procedure WriteHtmlParam(Param: THtmlParam); virtual;
procedure WriteHtmlEmbed(Embed: THtmlEmbed); virtual;
procedure WriteHtmlMap(Map: THtmlMap); virtual;
procedure WriteHtmlSpan(Span: THtmlSpan); virtual;
procedure WriteHtmlArea(Area: THtmlArea); virtual;
procedure WriteHtmlScript(Script: THtmlScript); virtual;
procedure WriteHtmlComment(Comment: THtmlComment); virtual;
procedure WriteHtmlSvg(Svg: THtmlSvg); virtual;
public
OwnsWriter: TBoolean;
constructor Create(Writer: TXmlWriter; OwnsWriter: TBoolean = True); virtual;
destructor Destroy(); override;
procedure WriteElement(Element: THtmlElement);
protected
class var
MethodAddresses: TMap<TClass, TPointer>;
class function GetClasses(): TList<TClass>; override;
public
class var
Classes: TList<TClass>;
class procedure RegisterClasses(); override;
class procedure UnregisterClasses(); override;
class procedure InitializeMethodAddresses();
class procedure FinalizeMethodAddresses();
class procedure Initialize();
class procedure Finalize();
end;
implementation
uses
Collection.List.Array_,
Exception,
Html.Attribute,
Image.Vector.Svg.Writer,
Integer._32,
Integer._32.TextFormat;
{ THtmlDocumentWriter }
constructor THtmlDocumentWriter.Create(Writer: TXmlWriter; OwnsWriter: TBoolean = True);
begin
inherited Create();
Self.Writer := Writer;
Self.OwnsWriter := OwnsWriter;
end;
destructor THtmlDocumentWriter.Destroy();
begin
if OwnsWriter then
Writer.Free();
inherited Destroy();
end;
class procedure THtmlDocumentWriter.Finalize();
begin
FinalizeMethodAddresses();
UnregisterClasses();
end;
class procedure THtmlDocumentWriter.FinalizeMethodAddresses();
begin
MethodAddresses.Free();
end;
class function THtmlDocumentWriter.GetClasses(): TList<TClass>;
begin
Result := Classes;
end;
function THtmlDocumentWriter.GetMethodAddress(Prefix: TText; Value: TObject; Suffix: TText): TPointer;
begin
Result := MethodAddresses[Value.ClassType];
if Result = nil then
raise EException.Create('Cannot find visitor function for ' + Value.ClassName);
end;
class procedure THtmlDocumentWriter.Initialize();
begin
RegisterClasses();
InitializeMethodAddresses();
end;
class procedure THtmlDocumentWriter.InitializeMethodAddresses();
begin
MethodAddresses := ConstructMethodAddressMap('Write', '');
end;
class procedure THtmlDocumentWriter.RegisterClasses();
begin
if Classes = nil then
begin
Classes := TArrayList<TClass>.Create();
Classes.Add(THtmlDocumentType);
Classes.Add(THtmlHead);
Classes.Add(THtmlTitle);
Classes.Add(THtmlBase);
Classes.Add(THtmlStyle);
Classes.Add(THtmlMetaName);
Classes.Add(THtmlMetaHttpEquivalent);
Classes.Add(THtmlMetaCharSet);
Classes.Add(THtmlBody);
Classes.Add(THtmlHtml);
Classes.Add(THtmlDocument);
Classes.Add(THtmlText);
Classes.Add(THtmlCharacterEntity);
Classes.Add(THtmlCharacterReference);
Classes.Add(THtmlFieldSet);
Classes.Add(THtmlDivision);
Classes.Add(THtmlLegend);
Classes.Add(THtmlParagraph);
Classes.Add(THtmlBlockQuote);
Classes.Add(THtmlHeading);
Classes.Add(THtmlLineBreak);
Classes.Add(THtmlHorizontalRuler);
Classes.Add(THtmlBold);
Classes.Add(THtmlItalics);
Classes.Add(THtmlUnderline);
Classes.Add(THtmlEmphasize);
Classes.Add(THtmlSubscript);
Classes.Add(THtmlSuperscript);
Classes.Add(THtmlPreformatted);
Classes.Add(THtmlCode);
Classes.Add(THtmlLink);
Classes.Add(THtmlAnchor);
Classes.Add(THtmlImage);
Classes.Add(THtmlTableBody);
Classes.Add(THtmlTableCell);
Classes.Add(THtmlTableRow);
Classes.Add(THtmlTable);
Classes.Add(THtmlListItem);
Classes.Add(THtmlList);
Classes.Add(THtmlForm);
Classes.Add(THtmlInput);
Classes.Add(THtmlButton);
Classes.Add(THtmlLabel);
Classes.Add(THtmlOption);
Classes.Add(THtmlSelect);
Classes.Add(THtmlTextArea);
Classes.Add(THtmlIframe);
Classes.Add(THtmlObject);
Classes.Add(THtmlParam);
Classes.Add(THtmlEmbed);
Classes.Add(THtmlMap);
Classes.Add(THtmlSpan);
Classes.Add(THtmlArea);
Classes.Add(THtmlScript);
Classes.Add(THtmlComment);
Classes.Add(THtmlSvg);
end;
end;
class procedure THtmlDocumentWriter.UnregisterClasses();
begin
Classes.Free();
end;
procedure THtmlDocumentWriter.WriteClosed(Tag: TText; Element: THtmlElement);
begin
WriteStart(Tag, Element);
WriteEnd(TXmlEndTag.Optional);
end;
procedure THtmlDocumentWriter.WriteContainerElement(Tag: TText; ContainerElement: THtmlContainerElement);
begin
WriteStart(Tag, ContainerElement);
WriteElements(ContainerElement.Contents);
WriteEnd();
end;
procedure THtmlDocumentWriter.WriteElement(Element: THtmlElement);
begin
Visit('Write', Element, '');
end;
procedure THtmlDocumentWriter.WriteAttributes(Element: THtmlElement);
var
Attributes: THtmlAttributes;
Attribute: THtmlAttribute;
i: TInteger32;
begin
Attributes := THtmlAttributes.Create();
Element.AddAttributes(Attributes);
for i := 0 to Attributes.Count - 1 do
begin
Attribute := Attributes[i];
Writer.WriteAttribute(Attribute.Name, Attribute.Value);
end;
Attributes.Free();
for i := 0 to Element.DataSet.Count - 1 do
begin
Attribute := Element.DataSet[i];
Writer.WriteAttribute('data-' + Attribute.Name, Attribute.Value);
end;
end;
procedure THtmlDocumentWriter.WriteElements(Elements: THtmlElementList);
var
i: TInteger32;
begin
for i := 0 to Elements.Count - 1 do
WriteElement(Elements[i]);
end;
procedure THtmlDocumentWriter.WriteEnd(EndTag: TXmlEndTag = TXmlEndTag.Always);
begin
Writer.EndElement(EndTag);
end;
procedure THtmlDocumentWriter.WriteHtmlAnchor(Anchor: THtmlAnchor);
begin
WriteContainerElement('a', Anchor);
end;
procedure THtmlDocumentWriter.WriteHtmlArea(Area: THtmlArea);
begin
WriteClosed('area', Area);
end;
procedure THtmlDocumentWriter.WriteHtmlBody(Body: THtmlBody);
begin
WriteContainerElement('body', Body);
end;
procedure THtmlDocumentWriter.WriteHtmlBold(Bold: THtmlBold);
begin
WriteContainerElement('b', Bold);
end;
procedure THtmlDocumentWriter.WriteHtmlButton(Button: THtmlButton);
begin
WriteContainerElement('button', Button);
end;
procedure THtmlDocumentWriter.WriteHtmlBase(Base: THtmlBase);
begin
WriteClosed('base', Base);
end;
procedure THtmlDocumentWriter.WriteHtmlBlockQuote(BlockQuote: THtmlBlockQuote);
begin
WriteContainerElement('blockquote', BlockQuote);
end;
procedure THtmlDocumentWriter.WriteHtmlCharacterEntity(CharacterEntity: THtmlCharacterEntity);
begin
Writer.WriteCharacterEntity(CharacterEntity.Code);
end;
procedure THtmlDocumentWriter.WriteHtmlCharacterReference(CharacterReference: THtmlCharacterReference);
begin
Writer.WriteCharacterReference(CharacterReference.Reference);
end;
procedure THtmlDocumentWriter.WriteHtmlCode(Code: THtmlCode);
begin
WriteContainerElement('code', Code);
end;
procedure THtmlDocumentWriter.WriteHtmlComment(Comment: THtmlComment);
begin
Writer.WriteComment(Comment.Lines.Join(#10));
end;
procedure THtmlDocumentWriter.WriteHtmlDivision(Division: THtmlDivision);
begin
WriteStart('div', Division);
WriteElements(Division.Contents);
WriteEnd();
end;
procedure THtmlDocumentWriter.WriteHtmlDocument(Document: THtmlDocument);
begin
WriteHtmlDocumentType(Document.DocumentType);
WriteHtmlHtml(Document.Html);
end;
procedure THtmlDocumentWriter.WriteHtmlDocumentType(DocumentType: THtmlDocumentType);
begin
Writer.StartDtd('html', DocumentType.PublicId, DocumentType.SystemId);
Writer.EndDtd();
end;
procedure THtmlDocumentWriter.WriteHtmlLegend(Legend: THtmlLegend);
begin
WriteStart('legend', Legend);
WriteElements(Legend.Contents);
WriteEnd();
end;
procedure THtmlDocumentWriter.WriteHtmlFieldSet(FieldSet: THtmlFieldSet);
begin
WriteStart('fieldset', FieldSet);
WriteElements(FieldSet.Contents);
WriteEnd();
end;
procedure THtmlDocumentWriter.WriteHtmlEmbed(Embed: THtmlEmbed);
begin
WriteClosed('embed', Embed);
end;
procedure THtmlDocumentWriter.WriteHtmlEmphasize(Emphasize: THtmlEmphasize);
begin
WriteContainerElement('em', Emphasize);
end;
procedure THtmlDocumentWriter.WriteHtmlForm(Form: THtmlForm);
begin
WriteContainerElement('form', Form);
end;
procedure THtmlDocumentWriter.WriteHtmlHead(Head: THtmlHead);
begin
WriteContainerElement('head', Head);
end;
procedure THtmlDocumentWriter.WriteHtmlHeading(Heading: THtmlHeading);
begin
WriteStart('h' + Integer32ToText(Heading.Level), Heading);
WriteElements(Heading.Contents);
WriteEnd();
end;
procedure THtmlDocumentWriter.WriteHtmlHorizontalRuler(HorizontalRuler: THtmlHorizontalRuler);
begin
WriteClosed('hr', HorizontalRuler);
end;
procedure THtmlDocumentWriter.WriteHtmlHtml(Html: THtmlHtml);
begin
WriteStart('html', Html);
WriteHtmlHead(Html.Head);
WriteContainerElement('body', Html.Body);
WriteEnd();
end;
procedure THtmlDocumentWriter.WriteHtmlIFrame(IFrame: THtmlIframe);
begin
WriteContainerElement('iframe', IFrame);
end;
procedure THtmlDocumentWriter.WriteHtmlImage(Image: THtmlImage);
begin
WriteClosed('img', Image);
end;
procedure THtmlDocumentWriter.WriteHtmlInput(Input: THtmlInput);
begin
WriteClosed('input', Input);
end;
procedure THtmlDocumentWriter.WriteHtmlItalics(Italics: THtmlItalics);
begin
WriteContainerElement('i', Italics);
end;
procedure THtmlDocumentWriter.WriteHtmlLabel(Label_: THtmlLabel);
begin
WriteStart('label', Label_);
WriteElements(Label_.Contents);
WriteEnd();
end;
procedure THtmlDocumentWriter.WriteHtmlLineBreak(LineBreak: THtmlLineBreak);
begin
WriteClosed('br', LineBreak);
end;
procedure THtmlDocumentWriter.WriteHtmlList(List: THtmlList);
var
Tag: TText;
begin
if List.Ordered then
Tag := 'ol'
else
Tag := 'ul';
WriteStart(Tag, List);
WriteListItems(List.Items);
WriteEnd();
end;
procedure THtmlDocumentWriter.WriteHtmlListItem(ListItem: THtmlListItem);
begin
WriteContainerElement('li', ListItem);
end;
procedure THtmlDocumentWriter.WriteHtmlMap(Map: THtmlMap);
begin
WriteContainerElement('map', Map);
end;
procedure THtmlDocumentWriter.WriteHtmlMetaCharSet(Meta: THtmlMetaCharSet);
begin
WriteClosed('meta', Meta);
end;
procedure THtmlDocumentWriter.WriteHtmlMetaHttpEquivalent(Meta: THtmlMetaHttpEquivalent);
begin
WriteClosed('meta', Meta);
end;
procedure THtmlDocumentWriter.WriteHtmlMetaName(Meta: THtmlMetaName);
begin
WriteClosed('meta', Meta);
end;
procedure THtmlDocumentWriter.WriteHtmlOption(Option: THtmlOption);
begin
WriteContainerElement('option', Option);
end;
procedure THtmlDocumentWriter.WriteHtmlObject(Object_: THtmlObject);
begin
WriteContainerElement('object', Object_);
end;
procedure THtmlDocumentWriter.WriteHtmlParagraph(Paragraph: THtmlParagraph);
begin
WriteContainerElement('p', Paragraph);
end;
procedure THtmlDocumentWriter.WriteHtmlParam(Param: THtmlParam);
begin
WriteClosed('param', Param);
end;
procedure THtmlDocumentWriter.WriteHtmlPreformatted(Preformatted: THtmlPreformatted);
begin
WriteContainerElement('pre', Preformatted);
end;
procedure THtmlDocumentWriter.WriteHtmlLink(Link: THtmlLink);
begin
WriteClosed('link', Link);
end;
procedure THtmlDocumentWriter.WriteHtmlScript(Script: THtmlScript);
begin
WriteStart('script', Script);
if Script.Lines.Count > 0 then
// TODO: The rules for embedding Javascript scripts into HTML are very awkward and unintuitive. Placing the contents of the
// <script> tag in a comment only prevents some syntactical problems. We might have to improve on this or prevent the
// use of script tags altogether
Writer.WriteComment(#10 + Script.Lines.Join(#10) + #10 + '//');
WriteEnd();
end;
procedure THtmlDocumentWriter.WriteHtmlSelect(Select: THtmlSelect);
var
i: TInteger32;
begin
WriteStart('select', Select);
for i := 0 to Select.Options.Count - 1 do
WriteHtmlOption(Select.Options[i]);
WriteEnd();
end;
procedure THtmlDocumentWriter.WriteHtmlSpan(Span: THtmlSpan);
begin
WriteContainerElement('span', Span);
end;
procedure THtmlDocumentWriter.WriteHtmlStyle(Style: THtmlStyle);
begin
WriteStart('style', Style);
if Style.Contents.Count > 0 then
Writer.CharacterData(Style.Contents.Join(' '));
WriteEnd();
end;
procedure THtmlDocumentWriter.WriteHtmlSubscript(Subscript: THtmlSubscript);
begin
WriteContainerElement('sub', Subscript);
end;
procedure THtmlDocumentWriter.WriteHtmlSuperscript(Superscript: THtmlSuperscript);
begin
WriteContainerElement('sup', Superscript);
end;
procedure THtmlDocumentWriter.WriteHtmlSvg(Svg: THtmlSvg);
var
SvgWriter: TSvgWriter;
begin
SvgWriter := TSvgWriter.Create(Writer);
try
SvgWriter.Write(Svg.Document);
finally
SvgWriter.Free();
end;
end;
procedure THtmlDocumentWriter.WriteHtmlTable(Table: THtmlTable);
var
Row: THtmlTableRow;
begin
WriteStart('table', Table);
if Table.Header.Count > 0 then
begin
Writer.StartElement('thead');
for Row in Table.Header do
WriteHtmlTableRow(Row);
Writer.EndElement();
end;
if Table.Footer.Rows.Count > 0 then
begin
WriteStart('tfoot', Table.Footer);
for Row in Table.Footer.Rows do
WriteHtmlTableRow(Row);
WriteEnd();
end;
WriteTableBodies(Table.Bodies);
WriteEnd();
end;
procedure THtmlDocumentWriter.WriteHtmlTableBody(Body: THtmlTableBody);
var
Row: THtmlTableRow;
begin
WriteStart('tbody', Body);
for Row in Body.Rows do
WriteHtmlTableRow(Row);
WriteEnd();
end;
procedure THtmlDocumentWriter.WriteHtmlTableCell(Cell: THtmlTableCell);
begin
if Cell.IsHeaderCell then
WriteStart('th', Cell)
else
WriteStart('td', Cell);
WriteElements(Cell.Contents);
WriteEnd();
end;
procedure THtmlDocumentWriter.WriteHtmlTableRow(Row: THtmlTableRow);
var
Cell: THtmlTableCell;
begin
WriteStart('tr', Row);
for Cell in Row.Cells do
WriteHtmlTableCell(Cell);
WriteEnd();
end;
procedure THtmlDocumentWriter.WriteHtmlText(Text: THtmlText);
begin
Writer.CharacterData(Text.Value);
end;
procedure THtmlDocumentWriter.WriteHtmlTextArea(TextArea: THtmlTextArea);
begin
WriteStart('textarea', TextArea);
Writer.CharacterData(TextArea.Value);
Writer.EndElement();
end;
procedure THtmlDocumentWriter.WriteHtmlTitle(Title: THtmlTitle);
begin
WriteContainerElement('title', Title);
end;
procedure THtmlDocumentWriter.WriteHtmlUnderline(Underline: THtmlUnderline);
begin
WriteContainerElement('u', Underline);
end;
procedure THtmlDocumentWriter.WriteListItems(Items: TList<THtmlListItem>);
var
Item: THtmlListItem;
begin
for Item in Items do
WriteHtmlListItem(Item);
end;
procedure THtmlDocumentWriter.WriteStart(Tag: TText; Element: THtmlElement);
begin
Writer.StartElement(Tag);
WriteAttributes(Element);
end;
procedure THtmlDocumentWriter.WriteTableBodies(Bodies: TList<THtmlTableBody>);
var
Body: THtmlTableBody;
begin
for Body in Bodies do
WriteHtmlTableBody(Body);
end;
initialization
THtmlDocumentWriter.Initialize();
finalization
THtmlDocumentWriter.Finalize();
end.
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