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HTMLp.DOMCore.pas
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unit HTMLp.DomCore;
interface
uses
Classes, SysUtils, StrUtils, RegularExpressions, Math;
const
TAB = 9;
LF = 10;
CR = 13;
SP = 32;
WhiteSpace = [TAB, LF, CR, SP];
NONE = 0; // extension
ELEMENT_NODE = 1;
ATTRIBUTE_NODE = 2;
TEXT_NODE = 3;
CDATA_SECTION_NODE = 4;
ENTITY_REFERENCE_NODE = 5;
ENTITY_NODE = 6;
PROCESSING_INSTRUCTION_NODE = 7;
COMMENT_NODE = 8;
DOCUMENT_NODE = 9;
DOCUMENT_TYPE_NODE = 10;
DOCUMENT_FRAGMENT_NODE = 11;
NOTATION_NODE = 12;
SCRIPT_NODE = 13;
END_ELEMENT_NODE = 255; // extension
INDEX_SIZE_ERR = 1;
DOMSTRING_SIZE_ERR = 2;
HIERARCHY_REQUEST_ERR = 3;
WRONG_DOCUMENT_ERR = 4;
INVALID_CHARACTER_ERR = 5;
NO_DATA_ALLOWED_ERR = 6;
NO_MODIFICATION_ALLOWED_ERR = 7;
NOT_FOUND_ERR = 8;
NOT_SUPPORTED_ERR = 9;
INUSE_ATTRIBUTE_ERR = 10;
INVALID_STATE_ERR = 11;
SYNTAX_ERR = 12;
INVALID_MODIFICATION_ERR = 13;
NAMESPACE_ERR = 14;
INVALID_ACCESS_ERR = 15;
{HTML DTDs}
DTD_HTML_STRICT = 1;
DTD_HTML_LOOSE = 2;
DTD_HTML_FRAMESET = 3;
DTD_XHTML_STRICT = 4;
DTD_XHTML_LOOSE = 5;
DTD_XHTML_FRAMESET = 6;
type
DomException = class(Exception)
private
FCode: Integer;
public
constructor Create(code: Integer);
property Code: Integer read FCode;
end;
TNamespaceURIList = class
private
FList: TStrings;
function GetItem(I: Integer): string;
public
constructor Create;
destructor Destroy; override;
function Add(const NamespaceURI: string): Integer;
procedure Clear;
property Item[I: Integer]: string read GetItem; default;
end;
TDocument = class;
TNodeList = class;
TNamedNodeMap = class;
TElement = class;
TNode = class
private
FOwnerDocument: TDocument;
FParentNode: TNode;
FNamespaceURI: Integer;
FPrefix: string;
FNodeName: string;
FNodeValue: string;
FAttributes: TNamedNodeMap;
function GetFirstChild: TNode;
function GetLastChild: TNode;
function GetPreviousSibling: TNode;
function GetNextSibling: TNode;
function GetLocalName: string;
function GetNamespaceURI: string;
function InsertSingleNode(newChild, refChild: TNode): TNode; virtual;
protected
FChildNodes: TNodeList;
function GetNodeValue: string; virtual;
function GetNodeType: Integer; virtual; abstract;
function GetParentNode: TNode; virtual;
function GetChildNodes: TNodeList; virtual;
function CanInsert(Node: TNode): Boolean; virtual;
function ExportNode(otherDocument: TDocument; deep: Boolean): TNode; virtual;
function GetNodeName: string; virtual;
procedure SetNodeValue(const value: string); virtual;
procedure SetNamespaceURI(const value: string);
procedure SetPrefix(const value: string);
procedure SetLocalName(const value: string);
procedure CloneChildNodesFrom(Node: TNode);
constructor Create(ownerDocument: TDocument; const namespaceURI, qualifiedName: string; withNS: Boolean);
public
destructor Destroy; override;
function InsertBefore(newChild, refChild: TNode): TNode; virtual;
function ReplaceChild(newChild, oldChild: TNode): TNode; virtual;
function RemoveChild(oldChild: TNode): TNode; virtual;
function AppendChild(newChild: TNode): TNode; virtual;
function HasChildNodes: Boolean;
function CloneNode(deep: Boolean): TNode; virtual; abstract;
{}
function IsSupported(const feature, version: string): Boolean;
function HasAttributes: Boolean;
function AncestorOf(node: TNode): Boolean;
procedure Normalize;
{}
function GetInnerText: string;
function GetInnerHTML: string;
function GetOuterHTML: string;
{}
property Name: string read GetNodeName;
property Value: string read GetNodeValue write SetNodeValue;
property NodeType: Integer read GetNodeType;
property ParentNode: TNode read GetParentNode write FParentNode;
property ChildNodes: TNodeList read GetChildNodes;
property FirstChild: TNode read GetFirstChild;
property LastChild: TNode read GetLastChild;
property PreviousSibling: TNode read GetPreviousSibling;
property NextSibling: TNode read GetNextSibling;
property Attributes: TNamedNodeMap read FAttributes;
property OwnerDocument: TDocument read FOwnerDocument;
property NamespaceURI: string read GetNamespaceURI;
property Prefix: string read FPrefix write SetPrefix;
property LocalName: string read GetLocalName;
end;
TNodeList = class
private
FOwnerNode: TNode;
FList: TList;
protected
function GetLength: Integer; virtual;
function IndexOf(node: TNode): Integer;
procedure Add(node: TNode);
procedure AddList(node: TNodeList);
procedure Delete(I: Integer);
procedure Insert(I: Integer; node: TNode);
procedure Remove(node: TNode);
procedure Clear(WithItems: Boolean);
property OwnerNode: TNode read FOwnerNode;
constructor Create(AOwnerNode: TNode);
public
destructor Destroy; override;
function GetItem(index: Integer): TNode; virtual;
function GetFirst: TNode;
function GetLast: TNode;
property Items[Index: Integer]: TNode read GetItem; default;
property Count: Integer read GetLength;
end;
TNamedNodeMap = class(TNodeList)
public
function GetNamedItem(const name: string): TNode;
function SetNamedItem(arg: TNode): TNode;
function RemoveNamedItem(const name: string): TNode;
function GetNamedItemNS(const namespaceURI, localName: string): TNode;
function SetNamedItemNS(arg: TNode): TNode;
function RemoveNamedItemNS(const namespaceURI, localName: string): TNode;
end;
TCharacterData = class(TNode)
private
function GetLength: Integer;
protected
procedure SetNodeValue(const value: string); override;
constructor Create(ownerDocument: TDocument; const data: string);
public
function SubstringData(offset, count: Integer): string;
procedure AppendData(const arg: string);
procedure DeleteData(offset, count: Integer);
procedure InsertData(offset: Integer; arg: string);
procedure ReplaceData(offset, count: Integer; const arg: string);
property Data: string read GetNodeValue write SetNodeValue;
property Length: Integer read GetLength;
end;
TComment = class(TCharacterData)
protected
function GetNodeName: string; override;
function GetNodeType: Integer; override;
function ExportNode(otherDocument: TDocument; deep: Boolean): TNode; override;
public
function CloneNode(deep: Boolean): TNode; override;
end;
TScript = class(TCharacterData)
protected
function GetNodeName: string; override;
function GetNodeType: Integer; override;
function ExportNode(otherDocument: TDocument; deep: Boolean): TNode; override;
public
function CloneNode(deep: Boolean): TNode; override;
end;
TTextNode = class(TCharacterData)
protected
function GetNodeName: string; override;
function GetNodeType: Integer; override;
function ExportNode(otherDocument: TDocument; deep: Boolean): TNode; override;
public
function CloneNode(deep: Boolean): TNode; override;
function SplitText(offset: Integer): TTextNode;
end;
TCDATASection = class(TTextNode)
protected
function GetNodeName: string; override;
function GetNodeType: Integer; override;
function ExportNode(otherDocument: TDocument; deep: Boolean): TNode; override;
public
function CloneNode(deep: Boolean): TNode; override;
end;
TAttr = class(TNode)
private
function GetOwnerElement: TElement;
function GetLength: Integer;
function GetSpecified: Boolean;
protected
function GetNodeValue: string; override;
function GetNodeType: Integer; override;
function GetParentNode: TNode; override;
function CanInsert(node: TNode): Boolean; override;
function ExportNode(ownerDocument: TDocument; deep: Boolean): TNode; override;
procedure SetNodeValue(const value: string); override;
public
function CloneNode(deep: Boolean): TNode; override;
property Name: string read GetNodeName;
property Specified: Boolean read GetSpecified;
property Value: string read GetNodeValue write SetNodeValue;
property OwnerElement: TElement read GetOwnerElement;
end;
TElement = class(TNode)
private
FIsEmpty: Boolean;
FChildElements: TNodeList;
procedure ReloadChildElements;
function InsertSingleNode(newChild, refChild: TNode): TNode; override;
protected
function GetChildElements: TNodeList;
function GetNodeType: Integer; override;
function GetNodeValue: string; override;
function CanInsert(node: TNode): Boolean; override;
function ExportNode(otherDocument: TDocument; deep: Boolean): TNode; override;
function InsertBefore(newChild, refChild: TNode): TNode; override;
function ReplaceChild(newChild, oldChild: TNode): TNode; override;
function RemoveChild(oldChild: TNode): TNode; override;
function AppendChild(newChild: TNode): TNode; override;
constructor Create(ownerDocument: TDocument; const namespaceURI, qualifiedName: string; withNS: Boolean);
destructor Destroy; override;
public
function CloneNode(deep: Boolean): TNode; override;
function GetAttribute(const name: string): string;
function GetAttributeNode(const name: string): TAttr;
function SetAttributeNode(newAttr: TAttr): TAttr;
function RemoveAttributeNode(oldAttr: TAttr): TAttr;
function GetAttributeNS(const namespaceURI, localName: string): string;
function GetAttributeNodeNS(const namespaceURI, localName: string): TAttr;
function SetAttributeNodeNS(newAttr: TAttr): TAttr;
function HasAttribute(const name: string): Boolean;
function HasAttributeNS(const namespaceURI, localName: string): Boolean;
function CheckAttribute(const attr, value: string): Boolean;
procedure SetAttribute(const name, value: string);
procedure RemoveAttribute(const name: string);
procedure SetAttributeNS(const namespaceURI, qualifiedName, value: string);
procedure RemoveAttributeNS(const namespaceURI, localName: string);
{}
procedure RemoveChilds(const attr, value: string);
{}
function GetElementsByAttr(const attrs, values: array of string; const deeper: Boolean = True): TNodeList; overload;
function GetElementByAttr(const attrs, values: array of string; const deeper: Boolean = True): TElement; overload;
{}
function GetElementsByAttr(const attr, value: string; const deeper: Boolean = True): TNodeList; overload;
function GetElementByAttr(const attr, value: string; const deeper: Boolean = True): TElement; overload;
{}
function GetElementsByClass(const name: string; const deeper: Boolean = True): TNodeList;
function GetElementByClass(const name: string; const deeper: Boolean = True): TElement;
{}
function GetElementsByTagName(const name: string; const deep: Integer = 0): TNodeList;
function GetElementByTagName(const name: string; const deep: Integer = 0): TElement;
{}
function GetElementsByTagNameNS(const namespaceURI, localName: string; const deep: Integer = 0): TNodeList;
function GetElementByTagNameNS(const namespaceURI, localName: string; const deep: Integer = 0): TElement;
{}
function GetElementByID(const elementId: string; const deeper: Boolean = True): TElement;
{}
function GetElementsByXPath(const XPath: string): TNodeList; overload;
function GetElementByXPath(const XPath: string): TElement; overload;
{}
function GetElementsByCSSSelector(const cssSelector: string): TNodeList; overload;
function GetElementByCSSSelector(const cssSelector: string): TElement; overload;
property TagName: string read GetNodeName;
property isEmpty: Boolean read FIsEmpty write FIsEmpty;
property ChildElements: TNodeList read GetChildElements;
end;
TEntityReference = class(TNode)
protected
function GetNodeType: Integer; override;
function ExportNode(otherDocument: TDocument; deep: Boolean): TNode; override;
constructor Create(ownerDocument: TDocument; const name: string);
public
function CloneNode(deep: Boolean): TNode; override;
end;
TProcessingInstruction = class(TNode)
private
function GetTarget: string;
function GetData: string;
procedure SetData(const value: string);
protected
function GetNodeType: Integer; override;
function ExportNode(otherDocument: TDocument; deep: Boolean): TNode; override;
constructor Create(ownerDocument: TDocument; const target, data: string);
public
function CloneNode(deep: Boolean): TNode; override;
property Target: string read GetTarget;
property Data: string read GetData write SetData;
end;
TDocumentFragment = class(TNode)
protected
function CanInsert(node: TNode): Boolean; override;
function GetNodeType: Integer; override;
function GetNodeName: string; override;
function ExportNode(otherDocument: TDocument; deep: Boolean): TNode; override;
constructor Create(ownerDocument: TDocument);
public
function CloneNode(deep: Boolean): TNode; override;
end;
TDocumentType = class(TNode)
private
FEntities: TNamedNodeMap;
FNotations: TNamedNodeMap;
FPublicID: string;
FSystemID: string;
FInternalSubset: string;
protected
function GetNodeType: Integer; override;
constructor Create(ownerDocument: TDocument; const name, publicId, systemId: string);
public
function CloneNode(deep: Boolean): TNode; override;
property Name: string read GetNodeName;
property Entities: TNamedNodeMap read FEntities;
property Notations: TNamedNodeMap read FNotations;
property PublicId: string read FPublicID;
property SystemId: string read FSystemID;
property InternalSubset: string read FInternalSubset;
end;
TDocument = class(TNode)
private
FDocType: TDocumentType;
FNamespaceURIList: TNamespaceURIList;
FSearchNodeLists: TList;
function GetDocumentElement: TElement;
protected
function GetNodeName: string; override;
function GetNodeType: Integer; override;
function CanInsert(Node: TNode): Boolean; override;
function CreateDocType(const name, publicId, systemId: string): TDocumentType;
procedure AddSearchNodeList(NodeList: TNodeList);
procedure RemoveSearchNodeList(NodeList: TNodeList);
procedure InvalidateSearchNodeLists;
procedure SetDocType(value: TDocumentType);
public
constructor Create(doctype: TDocumentType);
destructor Destroy; override;
procedure Clear;
function CloneNode(deep: Boolean): TNode; override;
function CreateElement(const tagName: string): TElement;
function CreateDocumentFragment: TDocumentFragment;
function CreateTextNode(const data: string): TTextNode;
function CreateComment(const data: string): TComment;
function CreateCDATASection(const data: string): TCDATASection;
function CreateProcessingInstruction(const target, data: string): TProcessingInstruction;
function CreateAttribute(const name: string): TAttr;
function CreateEntityReference(const name: string): TEntityReference;
function ImportNode(importedNode: TNode; deep: Boolean): TNode;
function CreateElementNS(const namespaceURI, qualifiedName: string): TElement;
function CreateAttributeNS(const namespaceURI, qualifiedName: string): TAttr;
function CreateScript(const data: string): TScript;
property Doctype: TDocumentType read FDocType write SetDocType;
property NamespaceURIList: TNamespaceURIList read FNamespaceURIList;
property DocumentElement: TElement read GetDocumentElement;
end;
DomImplementation = class
public
class function HasFeature(const feature, version: string): Boolean;
class function CreateDocumentType(const qualifiedName, publicId, systemId: string): TDocumentType;
class function CreateHTMLDocumentType(htmlDocType: Integer): TDocumentType; // extension
class function CreateEmptyDocument(doctype: TDocumentType): TDocument; // extension
class function CreateDocument(const namespaceURI, qualifiedName: string; doctype: TDocumentType): TDocument;
end;
implementation
uses
HTMLp.Entities;
const
ExceptionMsg: array[INDEX_SIZE_ERR..INVALID_ACCESS_ERR] of String = (
'Index or size is negative, or greater than the allowed value',
'The specified range of text does not fit into a DOMString',
'Node is inserted somewhere it doesn''t belong ',
'Node is used in a different document than the one that created it',
'Invalid or illegal character is specified, such as in a name',
'Data is specified for a node which does not support data',
'An attempt is made to modify an object where modifications are not allowed',
'An attempt is made to reference a node in a context where it does not exist',
'Implementation does not support the requested type of object or operation',
'An attempt is made to add an attribute that is already in use elsewhere',
'An attempt is made to use an object that is not, or is no longer, usable',
'An invalid or illegal string is specified',
'An attempt is made to modify the type of the underlying object',
'An attempt is made to create or change an object in a way which is incorrect with regard to namespaces',
'A parameter or an operation is not supported by the underlying object'
);
ID_NAME = 'id';
type
TDTDParams = record
PublicId: string;
SystemId: string;
end;
TDTDList = array[DTD_HTML_STRICT..DTD_XHTML_FRAMESET] of TDTDParams;
const
DTDList: TDTDList = (
// (publicId: ''; systemId: ''),
(publicId: '-//W3C//DTD HTML 4.01//EN'; systemId: 'http://www.w3.org/TR/html4/strict.dtd'),
(publicId: '-//W3C//DTD HTML 4.01 Transitional//EN'; systemId: 'http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd'),
(publicId: '-//W3C//DTD HTML 4.01 Frameset//EN'; systemId: 'http://www.w3.org/TR/1999/REC-html401-19991224/frameset.dtd'),
(publicId: '-//W3C//DTD XHTML 1.0 Strict//EN'; systemId: 'http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd'),
(publicId: '-//W3C//DTD XHTML 1.0 Transitional//EN'; systemId: 'http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd'),
(publicId: '-//W3C//DTD XHTML 1.0 Frameset//EN'; systemId: 'http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd')
);
HTML_TAG_NAME = 'html';
type
TSearchNodeList = class(TNodeList)
private
FNamespaceParam : string;
FNameParam : string;
FSynchronized: Boolean;
FMaxDeep: Integer;
function GetLength: Integer; override;
function AcceptNode(node: TNode): Boolean;
procedure TraverseTree(rootNode: TNode; const deep: Integer = 0);
procedure Rebuild;
public
constructor Create(AOwnerNode: TNode; const namespaceURI, name: string; const maxDeep: Integer = 0);
destructor Destroy; override;
procedure Invalidate;
function GetItem(index: Integer): TNode; override;
end;
{
function Concat(const S1, S2: TDomString): TDomString;
begin
SetLength(Result, Length(S1) + Length(S2));
Move(S1[1], Result[1], 2 * Length(S1));
Move(S2[1], Result[Length(S1) + 1], 2 * Length(S2))
end;
}
function IsNCName(const Value: string): Boolean;
begin
//TODO
Result := true
end;
{ =================
TNamespaceURIList
================== }
constructor TNamespaceURIList.Create;
begin
inherited Create;
FList := TStringList.Create;
FList.Add('')
end;
destructor TNamespaceURIList.Destroy;
begin
FList.Free;
inherited Destroy
end;
procedure TNamespaceURIList.Clear;
begin
FList.Clear
end;
function TNamespaceURIList.GetItem(I: Integer): string;
begin
Result := FList[I]
end;
function TNamespaceURIList.Add(const NamespaceURI: string): Integer;
var
I: Integer;
begin
for I := 0 to FList.Count - 1 do
if FList[I] = NamespaceURI then
begin
Result := I;
Exit
end;
Result := FList.Add(NamespaceURI)
end;
{ =================
DomException
================== }
constructor DomException.Create(code: Integer);
begin
inherited Create(ExceptionMsg[code]);
FCode := code
end;
{ =================
TNode
================== }
constructor TNode.Create(ownerDocument: TDocument; const namespaceURI, qualifiedName: string; withNS: Boolean);
var
I: Integer;
begin
inherited Create;
FOwnerDocument := ownerDocument;
SetNamespaceURI(namespaceURI);
if withNS then
begin
I := Pos(':', qualifiedName);
if I <> 0 then
begin
SetPrefix(Copy(qualifiedName, 1, I - 1));
SetLocalName(Copy(qualifiedName, I + 1, Length(qualifiedName) - I))
end
else SetLocalName(qualifiedName);
end
else SetLocalName(qualifiedName);
FChildNodes := TNodeList.Create(Self);
end;
destructor TNode.Destroy;
begin
if Assigned(FChildNodes) then
begin
FChildNodes.Clear(True);
FChildNodes.Free;
end;
if Assigned(FAttributes) then
begin
FAttributes.Clear(True);
FAttributes.Free
end;
inherited Destroy;
end;
function TNode.GetFirstChild: TNode;
begin
Result := nil;
if ChildNodes.Count <> 0 then Result := ChildNodes.GetItem(0);
end;
function TNode.GetLastChild: TNode;
begin
Result := nil;
if ChildNodes.Count <> 0 then Result := ChildNodes.GetItem(ChildNodes.Count - 1);
end;
function TNode.GetPreviousSibling: TNode;
var
I: Integer;
begin
Result := nil;
if Assigned(ParentNode) then
begin
I := ParentNode.ChildNodes.IndexOf(Self);
if I > 0 then Result := ParentNode.ChildNodes.GetItem(I - 1);
end
end;
function TNode.GetNextSibling: TNode;
var
I: Integer;
begin
Result := nil;
if Assigned(ParentNode) then
begin
I := ParentNode.ChildNodes.IndexOf(Self);
if (I >= 0) and (I < ParentNode.ChildNodes.Count - 1) then Result := ParentNode.ChildNodes.GetItem(I + 1);
end
end;
function TNode.GetNodeName: string;
begin
if FPrefix <> '' then Result := FPrefix + ':' + FNodeName
else Result := FNodeName;
end;
function TNode.GetNodeValue: string;
begin
Result := FNodeValue;
end;
function TNode.GetParentNode: TNode;
begin
Result := FParentNode;
end;
function TNode.GetChildNodes: TNodeList;
begin
Result := FChildNodes;
end;
function TNode.GetLocalName: string;
begin
Result := FNodeName;
end;
function TNode.CanInsert(Node: TNode): Boolean;
begin
Result := False;
end;
function TNode.ExportNode(otherDocument: TDocument; deep: Boolean): TNode;
begin
raise DomException.Create(NOT_SUPPORTED_ERR)
end;
procedure TNode.SetNodeValue(const value: string);
begin
raise DomException.Create(NO_MODIFICATION_ALLOWED_ERR)
end;
procedure TNode.SetNamespaceURI(const value: string);
begin
//TODO validate
if value <> '' then FNamespaceURI := FOwnerDocument.NamespaceURIList.Add(value);
end;
function TNode.GetNamespaceURI: string;
begin
Result := FOwnerDocument.NamespaceURIList[FNamespaceURI]
end;
procedure TNode.SetPrefix(const value: string);
begin
if not IsNCName(value) then raise DomException.Create(INVALID_CHARACTER_ERR);
FPrefix := value;
end;
procedure TNode.SetLocalName(const value: string);
begin
if not IsNCName(value) then raise DomException.Create(INVALID_CHARACTER_ERR);
FNodeName := value
end;
procedure TNode.CloneChildNodesFrom(Node: TNode);
var
childNode: TNode;
I: Integer;
begin
for I := 0 to Node.ChildNodes.Count - 1 do
begin
childNode := Node.ChildNodes.GetItem(I);
AppendChild(childNode.CloneNode(true))
end
end;
function TNode.InsertSingleNode(newChild, refChild: TNode): TNode;
var
I: Integer;
begin
Result := nil;
if not (CanInsert(newChild))
or newChild.AncestorOf(Self) then
begin
raise DomException.Create(HIERARCHY_REQUEST_ERR);
end;
if newChild <> refChild then
begin
if Assigned(refChild) then
begin
I := FChildNodes.IndexOf(refChild);
if I < 0 then raise DomException.Create(NOT_FOUND_ERR);
FChildNodes.Insert(I, newChild);
end
else FChildNodes.Add(newChild);
if Assigned(newChild.ParentNode) then newChild.ParentNode.RemoveChild(newChild);
newChild.FParentNode := Self;
end;
Result := newChild;
end;
function TNode.InsertBefore(newChild, refChild: TNode): TNode;
begin
if newChild.OwnerDocument <> FOwnerDocument then raise DomException.Create(WRONG_DOCUMENT_ERR);
if newChild.NodeType = DOCUMENT_FRAGMENT_NODE then
begin
while Assigned(newChild.FirstChild) do InsertSingleNode(newChild.FirstChild, refChild);
Result := newChild;
end
else Result := InsertSingleNode(newChild, refChild);
if Assigned(FOwnerDocument) then FOwnerDocument.InvalidateSearchNodeLists;
end;
function TNode.ReplaceChild(newChild, oldChild: TNode): TNode;
begin
if newChild <> oldChild then
begin
InsertBefore(newChild, oldChild);
RemoveChild(oldChild)
end;
Result := oldChild;
if Assigned(FOwnerDocument) then FOwnerDocument.InvalidateSearchNodeLists;
end;
function TNode.AppendChild(newChild: TNode): TNode;
begin
Result := InsertBefore(newChild, nil);
if Assigned(FOwnerDocument) then FOwnerDocument.InvalidateSearchNodeLists;
end;
function TNode.RemoveChild(oldChild: TNode): TNode;
var
I: Integer;
begin
I := FChildNodes.IndexOf(oldChild);
if I < 0 then raise DomException.Create(NOT_FOUND_ERR);
FChildNodes.Delete(I);
oldChild.FParentNode := nil;
Result := oldChild;
if Assigned(FOwnerDocument) then FOwnerDocument.InvalidateSearchNodeLists;
end;
function TNode.HasChildNodes: Boolean;
begin
Result := (FChildNodes.Count <> 0);
end;
function TNode.IsSupported(const feature, version: string): Boolean;
begin
Result := DOMImplementation.HasFeature(feature, version);
end;
function TNode.HasAttributes: Boolean;
begin
Result := Assigned(FAttributes) and (FAttributes.Count <> 0)
end;
function TNode.AncestorOf(node: TNode): Boolean;
begin
while Assigned(node) do
begin
if node = self then
begin
Result := True;
Exit
end;
node := node.ParentNode;
end;
Result := False;
end;
procedure TNode.Normalize;
var
childNode: TNode;
textNode: TTextNode;
I: Integer;
begin
I := 0;
while I < ChildNodes.Count do
begin
childNode := ChildNodes.GetItem(I);
if childNode.NodeType = ELEMENT_NODE then
begin
(childNode as TElement).Normalize;
Inc(I);
end
else if childNode.NodeType = TEXT_NODE then
begin
textNode := childNode as TTextNode;
Inc(I);
childNode := ChildNodes.GetItem(I);
while childNode.NodeType = TEXT_NODE do
begin
textNode.AppendData((childNode as TTextNode).Data);
Inc(I);
childNode := ChildNodes.GetItem(I);
end;
end
else Inc(I);
end
end;
function TNode.GetInnerText: string;
var
I: Integer;
begin
Result := '';
if NodeType = TEXT_NODE then Result := Result + Value;
if (NodeType = ELEMENT_NODE)
and ((Self as TElement).HasAttribute('alt')) then Result := Result + (Self as TElement).GetAttribute('alt');
for I := 0 to FChildNodes.Count - 1 do
begin
Result := Result + FChildNodes[I].GetInnerText;
end;
end;
function TNode.GetInnerHTML: string;
var
I: Integer;
begin
Result := '';
for I := 0 to FChildNodes.Count - 1 do
begin
Result := Result + FChildNodes[I].GetOuterHTML;
end;
end;
function TNode.GetOuterHTML: string;
var
I: Integer;
begin
Result := '';
if NodeType = ELEMENT_NODE then
begin
Result := '<' + FNodeName;
for I := 0 to FAttributes.Count - 1 do Result := Result + ' ' + FAttributes[I].Name + '="' + (FAttributes[I] as TAttr).Value + '"';
Result := Result + '>';
end
else if NodeType = TEXT_NODE then Result := Result + Value
else if NodeType = END_ELEMENT_NODE then Result := Result + '</' + FNodeName + '>';
for I := 0 to FChildNodes.Count - 1 do
begin
Result := Result + FChildNodes[I].GetOuterHTML;
end;
if NodeType = ELEMENT_NODE then Result := Result + '</' + FNodeName + '>';
end;
{ =================
TNodeList
================== }
constructor TNodeList.Create(AOwnerNode: TNode);
begin
inherited Create;
FOwnerNode := AOwnerNode;
FList := TList.Create;
end;
destructor TNodeList.Destroy;
begin
// Clear(False);
FreeAndNil(FList);
inherited Destroy;
end;
function TNodeList.IndexOf(node: TNode): Integer;
begin
Result := FList.IndexOf(node);
end;
function TNodeList.GetLength: Integer;
begin
Result := FList.Count;
end;
procedure TNodeList.Insert(I: Integer; Node: TNode);
begin
FList.Insert(I, Node);
end;
procedure TNodeList.Delete(I: Integer);
begin
FList.Delete(I);
end;
procedure TNodeList.Add(node: TNode);
begin
FList.Add(node);
end;
procedure TNodeList.AddList(node: TNodeList);
var
I: Integer;
begin
for I := 0 to node.Count - 1 do FList.Add(node[I]);
end;
procedure TNodeList.Remove(node: TNode);
begin
FList.Remove(node);
end;
function TNodeList.GetItem(index: Integer): TNode;
begin
Result := nil;
if (index >= 0) and (index < Count) then Result := FList[index];
end;
function TNodeList.GetFirst: TNode;
begin
Result := nil;
if FList.Count > 0 then Result := FList[0];
end;
function TNodeList.GetLast: TNode;