1615 lines
41 KiB
ObjectPascal
1615 lines
41 KiB
ObjectPascal
{-----------------------------------------------------------------------------
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The contents of this file are subject to the Mozilla Public License
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Version 1.1 (the "License"); you may not use this file except in compliance
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with the License. You may obtain a copy of the License at
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http://www.mozilla.org/MPL/MPL-1.1.html
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Software distributed under the License is distributed on an "AS IS" basis,
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WITHOUT WARRANTY OF ANY KIND, either expressed or implied. See the License for
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the specific language governing rights and limitations under the License.
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The Original Code is: JvXMLTree.PAS, released on 2002-06-15.
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The Initial Developer of the Original Code is Jan Verhoeven [jan1 dott verhoeven att wxs dott nl]
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Portions created by Jan Verhoeven are Copyright (C) 2002 Jan Verhoeven.
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All Rights Reserved.
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Contributor(s): Robert Love [rlove att slcdug dott org].
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You may retrieve the latest version of this file at the Project JEDI's JVCL home page,
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located at http://jvcl.sourceforge.net
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Known Issues:
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-----------------------------------------------------------------------------}
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// $Id: JvXmlTree.pas 11025 2006-11-22 19:07:34Z ahuser $
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unit JvXmlTree;
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{$I jvcl.inc}
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interface
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uses
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{$IFDEF UNITVERSIONING}
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JclUnitVersioning,
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{$ENDIF UNITVERSIONING}
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SysUtils, Classes,
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{$IFDEF HAS_UNIT_VARIANTS}
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Variants,
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{$ENDIF HAS_UNIT_VARIANTS}
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JvStrings;
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type
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TJvXMLValueType = (xvtString, xvtCDATA);
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TJvXMLFilterOperator = (xfoNOP, xfoEQ, xfoIEQ, xfoNE, xfoINE, xfoGE,
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xfoIGE, xfoLE, xfoILE, xfoGT, xfoIGT, xfoLT, xfoILT);
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TJvXMLTree = class;
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TJvXMLFilterAtom = class(TObject)
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private
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FValue: string;
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FName: string;
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FOperator: TJvXMLFilterOperator;
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FAttributeFilter: Boolean;
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public
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property Name: string read FName write FName;
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property Operator: TJvXMLFilterOperator read FOperator write FOperator;
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property Value: string read FValue write FValue;
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property AttributeFilter: Boolean read FAttributeFilter write FAttributeFilter;
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end;
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TJvXMLFilter = class(TObject)
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private
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FName: string;
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FFilters: TList;
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procedure Initialize(FilterStr: string);
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public
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constructor Create(const FilterStr: string);
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destructor Destroy; override;
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property Name: string read FName write FName;
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property Filters: TList read FFilters write FFilters;
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end;
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TJvXMLNode = class;
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TJvXMLAttribute = class(TObject)
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private
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FName: string;
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FValue: Variant;
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FParent: TJvXMLNode;
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public
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constructor Create(AParent: TJvXMLNode; const AName: string; AValue: Variant);
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function Document: string;
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property Name: string read FName write FName;
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property Value: Variant read FValue write FValue;
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property Parent: TJvXMLNode read FParent write FParent;
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end;
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TJvXMLNode = class(TObject)
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private
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FName: string;
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FValue: Variant;
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FNodes: TList;
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FAttributes: TList;
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FParentNode: TJvXMLNode;
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FValueType: TJvXMLValueType;
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public
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constructor Create(const AName: string; AValue: Variant; AParent: TJvXMLNode);
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destructor Destroy; override;
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// added 29-July-2000
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function GetNamePathNode(const APath: string): TJvXMLNode;
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procedure DeleteNamePathNode(const APath: string);
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function ForceNamePathNode(const APath: string): TJvXMLNode;
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function GetNamePathNodeAttribute(const APath, AName: string): TJvXMLAttribute;
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procedure DeleteNamePathNodeAttribute(const APath, AName: string);
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function ForceNamePathNodeAttribute(const APath, AName: string; AValue: Variant): TJvXMLAttribute;
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function AddNode(const AName: string; AValue: Variant): TJvXMLNode;
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function AddNodeEx(const AName: string; AValue: Variant): TJvXMLNode;
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procedure DeleteNode(Index: Integer);
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procedure ClearNodes;
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function AddAttribute(const AName: string; AValue: Variant): TJvXMLAttribute;
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function GetAttributeValue(const AName: string): Variant;
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procedure DeleteAttribute(Index: Integer);
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procedure ClearAttributes;
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function Document(ALevel: Integer): string;
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function GetNodePath: string;
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function GetNamedNode(const AName: string): TJvXMLNode;
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function SelectSingleNode(const APattern: string): TJvXMLNode;
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procedure SelectNodes(APattern: string; AList: TList);
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function TransformNode(AStyleSheet: TJvXMLNode): string;
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function Process(ALevel: Integer; ANode: TJvXMLNode): string;
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function FindNamedNode(const AName: string): TJvXMLNode;
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procedure FindNamedNodes(const AName: string; AList: TList);
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procedure GetAllNodes(AList: TList);
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function GetNamedAttribute(const AName: string): TJvXMLAttribute;
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procedure FindNamedAttributes(const AName: string; AList: TList);
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function MatchFilter(AObjFilter: TJvXMLFilter): Boolean;
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procedure MatchPattern(const APattern: string; AList: TList);
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procedure GetNodeNames(AList: TStrings);
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procedure GetAttributeNames(AList: TStrings);
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function GetNameSpace: string;
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function HasChildNodes: Boolean;
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function CloneNode: TJvXMLNode;
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function FirstChild: TJvXMLNode;
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function LastChild: TJvXMLNode;
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function PreviousSibling: TJvXMLNode;
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function NextSibling: TJvXMLNode;
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function MoveAddNode(Dest: TJvXMLNode): TJvXMLNode;
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function MoveInsertNode(Dest: TJvXMLNode): TJvXMLNode;
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function RemoveChildNode(ANode: TJvXMLNode): TJvXMLNode;
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property Name: string read FName write FName;
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property Value: Variant read FValue write FValue;
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property ValueType: TJvXMLValueType read FValueType write FValueType;
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property Nodes: TList read FNodes write FNodes;
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property ParentNode: TJvXMLNode read FParentNode write FParentNode;
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property Attributes: TList read FAttributes write FAttributes;
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end;
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TJvXMLTree = class(TJvXMLNode)
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private
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FLines: TStringList;
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FNodeCount: Integer;
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function GetLines: TStrings;
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procedure SetLines(const Value: TStrings);
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function GetText: string;
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procedure SetText(const Value: string);
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public
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constructor Create(const AName: string; AValue: Variant; AParent: TJvXMLNode);
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destructor Destroy; override;
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procedure ParseXML;
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procedure LoadFromFile(const FileName: string);
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procedure LoadFromStream(Stream: TStream);
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procedure SaveToFile(const FileName: string);
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procedure SaveToStream(Stream: TStream);
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function AsText: string;
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property Lines: TStrings read GetLines write SetLines;
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property NodeCount: Integer read FNodeCount;
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property Text: string read GetText write SetText;
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end;
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procedure PreProcessXML(AList: TStrings);
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{$IFDEF UNITVERSIONING}
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const
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UnitVersioning: TUnitVersionInfo = (
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RCSfile: '$URL: https://jvcl.svn.sourceforge.net/svnroot/jvcl/tags/JVCL3_32/run/JvXmlTree.pas $';
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Revision: '$Revision: 11025 $';
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Date: '$Date: 2006-11-22 20:07:34 +0100 (mer., 22 nov. 2006) $';
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LogPath: 'JVCL\run'
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);
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{$ENDIF UNITVERSIONING}
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implementation
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uses
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JvConsts;
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procedure PreProcessXML(AList: TStrings);
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var
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OList: TStringList;
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S, xTag, xText, xData: string;
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P1, P2, C: Integer;
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//Level: Integer;
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function Clean(const AText: string): string;
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begin
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Result := StringReplace(AText, sLineBreak, ' ', [rfReplaceAll]);
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Result := StringReplace(Result, Tab, ' ', [rfReplaceAll]);
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Result := Trim(Result);
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end;
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function CleanCDATA(const AText: string): string;
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begin
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Result := StringReplace(AText, sLineBreak, '\n ', [rfReplaceAll]);
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Result := StringReplace(Result, Tab, '\t ', [rfReplaceAll]);
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end;
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begin
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OList := TStringList.Create;
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try
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S := AList.Text;
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xText := '';
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xTag := '';
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P1 := 1;
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C := Length(S);
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//Level := 0;
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repeat
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P2 := PosStr('<', S, P1);
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if P2 > 0 then
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begin
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xText := Trim(Copy(S, P1, P2 - P1));
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if xText <> '' then
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OList.Add('TX:' + Clean(xText));
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P1 := P2;
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// check for CDATA
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if UpperCase(Copy(S, P1, 9)) = '<![CDATA[' then
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begin
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P2 := PosStr(']]>', S, P1);
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xData := Copy(S, P1 + 9, P2 - P1 - 9);
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OList.Add('CD:' + CleanCDATA(xData));
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P1 := P2 + 2;
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end
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else
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begin
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P2 := PosStr('>', S, P1);
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if P2 > 0 then
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begin
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xTag := Copy(S, P1 + 1, P2 - P1 - 1);
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P1 := P2;
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if xTag[1] = '/' then
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begin
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Delete(xTag, 1, 1);
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OList.Add('CT:' + Clean(xTag));
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//Dec(Level);
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end
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else
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if xTag[Length(xTag)] = '/' then
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OList.Add('ET:' + Clean(xTag))
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else
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begin
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//Inc(Level);
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OList.Add('OT:' + Clean(xTag));
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end;
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end;
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end;
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end
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else
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begin
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xText := Trim(Copy(S, P1, Length(S)));
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if xText <> '' then
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begin
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OList.Add('TX:' + Clean(xText));
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end;
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P1 := C;
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end;
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Inc(P1);
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until P1 > C;
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AList.Assign(OList);
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finally
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OList.Free;
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end;
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end;
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//=== { TJvXMLNode } =========================================================
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constructor TJvXMLNode.Create(const AName: string; AValue: Variant; AParent: TJvXMLNode);
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begin
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inherited Create;
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FNodes := TList.Create;
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FName := AName;
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FValue := AValue;
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FValueType := xvtString;
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FParentNode := AParent;
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FAttributes := TList.Create;
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end;
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destructor TJvXMLNode.Destroy;
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begin
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ClearNodes;
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FNodes.Free;
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ClearAttributes;
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FAttributes.Free;
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inherited Destroy;
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end;
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function TJvXMLNode.AddAttribute(const AName: string; AValue: Variant): TJvXMLAttribute;
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begin
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Result := TJvXMLAttribute.Create(Self, AName, AValue);
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Attributes.Add(Result);
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end;
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function TJvXMLNode.AddNode(const AName: string; AValue: Variant): TJvXMLNode;
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begin
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Result := TJvXMLNode.Create(AName, AValue, Self);
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Nodes.Add(Result);
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end;
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// adds node and parses any attributes;
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function TJvXMLNode.AddNodeEx(const AName: string; AValue: Variant): TJvXMLNode;
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var
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S, SN, SV: string;
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C, P1, P2: Integer;
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begin
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Result := TJvXMLNode.Create(AName, AValue, Self);
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Self.Nodes.Add(Result);
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C := Length(AName);
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//first parse Name
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P1 := PosStr(' ', AName, 1);
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if P1 = 0 then
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Exit;
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S := Copy(AName, 1, P1 - 1);
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Result.Name := S;
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repeat
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// find '='
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P2 := PosStr('=', AName, P1);
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if P2 = 0 then
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Break;
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SN := Trim(Copy(AName, P1, P2 - P1));
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P1 := P2;
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// find begin of value
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P1 := PosStr('"', AName, P1);
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if P1 = 0 then
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Break;
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P2 := PosStr('"', AName, P1 + 1);
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if P2 = 0 then
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Exit;
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SV := Copy(AName, P1 + 1, P2 - P1 - 1);
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Result.AddAttribute(SN, SV);
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P1 := P2 + 1;
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until P1 > C;
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end;
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function TJvXMLNode.GetNamedAttribute(const AName: string): TJvXMLAttribute;
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var
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I: Integer;
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N: TJvXMLAttribute;
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begin
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Result := nil;
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for I := 0 to Attributes.Count - 1 do
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begin
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N := TJvXMLAttribute(Attributes[I]);
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if N.Name = AName then
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begin
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Result := N;
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Break;
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end;
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end;
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end;
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procedure TJvXMLNode.ClearAttributes;
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var
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I: Integer;
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begin
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if Attributes.Count <> 0 then
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begin
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for I := 0 to Attributes.Count - 1 do
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TJvXMLAttribute(Attributes[I]).Free;
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Attributes.Clear;
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end;
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end;
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procedure TJvXMLNode.ClearNodes;
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var
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I: Integer;
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begin
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for I := 0 to Nodes.Count - 1 do
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TJvXMLNode(Nodes[I]).Free;
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Nodes.Clear;
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end;
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procedure TJvXMLNode.DeleteAttribute(Index: Integer);
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begin
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if (Attributes.Count > 0) and (Index < Attributes.Count) then
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begin
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TJvXMLAttribute(Attributes[Index]).Free;
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Attributes.Delete(Index);
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end;
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end;
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procedure TJvXMLNode.DeleteNode(Index: Integer);
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begin
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if (Nodes.Count > 0) and (Index < Nodes.Count) then
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begin
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TJvXMLNode(Nodes[Index]).Free;
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Nodes.Delete(Index);
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end;
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end;
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function TJvXMLNode.Document(ALevel: Integer): string;
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var
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I: Integer;
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Indent: string;
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function ExpandCDATA(const AValue: string): string;
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begin
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Result := StringReplace(AValue, '\n ', sLineBreak, [rfReplaceAll]);
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Result := StringReplace(Result, '\t ', Tab, [rfReplaceAll]);
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end;
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begin
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if ALevel > 0 then
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Indent := StringOfChar(' ', ALevel * 2)
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else
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Indent := '';
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Result := Indent + '<' + Name;
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if Attributes.Count > 0 then
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for I := 0 to Attributes.Count - 1 do
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Result := Result + TJvXMLAttribute(Attributes[I]).Document;
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if (Nodes.Count = 0) and (Value = '') then
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begin
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Result := Result + ' />' + sLineBreak;
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Exit;
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end
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else
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Result := Result + '>' + sLineBreak;
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if Value <> '' then
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begin
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if ValueType = xvtString then
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Result := Result + Indent + ' ' + Value + sLineBreak
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else
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if ValueType = xvtCDATA then
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Result := Result + Indent + ' ' + '<![CDATA[' + ExpandCDATA(Value) + ']]>' + sLineBreak;
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end;
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if Nodes.Count <> 0 then
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for I := 0 to Nodes.Count - 1 do
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Result := Result + TJvXMLNode(Nodes[I]).Document(ALevel + 1);
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Result := Result + Indent + '</' + Name + '>' + sLineBreak;
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end;
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// duplicates a node recursively
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function TJvXMLNode.CloneNode: TJvXMLNode;
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var
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I: Integer;
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N: TJvXMLNode;
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begin
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Result := TJvXMLNode.Create(Name, Value, nil);
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Result.Name := Name;
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Result.Value := Value;
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if Attributes.Count > 0 then
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for I := 0 to Attributes.Count - 1 do
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Result.AddAttribute(TJvXMLAttribute(Attributes[I]).Name, TJvXMLAttribute(Attributes[I]).Value);
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if Nodes.Count > 0 then
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for I := 0 to Nodes.Count - 1 do
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begin
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N := TJvXMLNode(Nodes[I]).CloneNode;
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Result.Nodes.Add(N);
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end;
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end;
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|
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function TJvXMLNode.GetNamedNode(const AName: string): TJvXMLNode;
|
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var
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I: Integer;
|
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N: TJvXMLNode;
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begin
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Result := nil;
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for I := 0 to Nodes.Count - 1 do
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begin
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N := TJvXMLNode(Nodes[I]);
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if N.Name = AName then
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begin
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Result := N;
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Exit;
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end;
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end;
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end;
|
|
|
|
function TJvXMLNode.FirstChild: TJvXMLNode;
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begin
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if Nodes.Count > 0 then
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Result := TJvXMLNode(Nodes[0])
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else
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Result := nil;
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end;
|
|
|
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function TJvXMLNode.LastChild: TJvXMLNode;
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begin
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if Nodes.Count > 0 then
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Result := TJvXMLNode(Nodes[Nodes.Count - 1])
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else
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Result := nil;
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end;
|
|
|
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function TJvXMLNode.NextSibling: TJvXMLNode;
|
|
var
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Index: Integer;
|
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begin
|
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Result := nil;
|
|
if ParentNode = nil then
|
|
Exit;
|
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Index := ParentNode.Nodes.IndexOf(Self);
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if Index = -1 then
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Exit;
|
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if Index < ParentNode.Nodes.Count - 1 then
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Result := TJvXMLNode(ParentNode.Nodes[Index + 1]);
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end;
|
|
|
|
function TJvXMLNode.PreviousSibling: TJvXMLNode;
|
|
var
|
|
Index: Integer;
|
|
begin
|
|
Result := nil;
|
|
if ParentNode = nil then
|
|
Exit;
|
|
Index := ParentNode.Nodes.IndexOf(Self);
|
|
if Index = -1 then
|
|
Exit;
|
|
if Index > 0 then
|
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Result := TJvXMLNode(ParentNode.Nodes[Index - 1]);
|
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end;
|
|
// moves a node to a new location
|
|
|
|
function TJvXMLNode.MoveInsertNode(Dest: TJvXMLNode): TJvXMLNode;
|
|
var
|
|
Index1, Index2: Integer;
|
|
begin
|
|
Result := nil;
|
|
if Dest.ParentNode = nil then
|
|
Exit; // can not move to root
|
|
Index1 := Self.ParentNode.Nodes.IndexOf(Self);
|
|
if Index1 = -1 then
|
|
Exit;
|
|
Index2 := Dest.ParentNode.Nodes.IndexOf(Dest);
|
|
if Index2 = -1 then
|
|
Exit;
|
|
Dest.ParentNode.Nodes.Insert(Index2, Self);
|
|
Self.ParentNode.Nodes.Delete(Index1);
|
|
Self.ParentNode := Dest.ParentNode;
|
|
Result := Self;
|
|
end;
|
|
|
|
function TJvXMLNode.MoveAddNode(Dest: TJvXMLNode): TJvXMLNode;
|
|
var
|
|
Index: Integer;
|
|
begin
|
|
Result := nil;
|
|
if Dest = nil then
|
|
Exit; // can not move to root
|
|
Index := Self.ParentNode.Nodes.IndexOf(Self);
|
|
if Index = -1 then
|
|
Exit;
|
|
Dest.Nodes.Add(Self);
|
|
Self.ParentNode.Nodes.Delete(Index);
|
|
Self.ParentNode := Dest;
|
|
Result := Self;
|
|
end;
|
|
|
|
// removes and Frees the childnode recursively.
|
|
// returns Self when done, or nil in case of error
|
|
|
|
function TJvXMLNode.RemoveChildNode(ANode: TJvXMLNode): TJvXMLNode;
|
|
var
|
|
Index: Integer;
|
|
begin
|
|
Result := nil;
|
|
Index := Nodes.IndexOf(ANode);
|
|
if Index = -1 then
|
|
Exit;
|
|
Nodes.Delete(Index);
|
|
ANode.Free;
|
|
Result := Self;
|
|
end;
|
|
|
|
function TJvXMLNode.HasChildNodes: Boolean;
|
|
begin
|
|
Result := Nodes.Count > 0;
|
|
end;
|
|
|
|
procedure TJvXMLNode.GetAttributeNames(AList: TStrings);
|
|
var
|
|
I: Integer;
|
|
begin
|
|
AList.Clear;
|
|
for I := 0 to Attributes.Count - 1 do
|
|
AList.Add(TJvXMLAttribute(Attributes[I]).Name);
|
|
end;
|
|
|
|
procedure TJvXMLNode.GetNodeNames(AList: TStrings);
|
|
var
|
|
I, C: Integer;
|
|
begin
|
|
AList.Clear;
|
|
C := Nodes.Count;
|
|
for I := 0 to C - 1 do
|
|
AList.Add(TJvXMLNode(Nodes[I]).Name);
|
|
end;
|
|
|
|
function TJvXMLNode.GetNodePath: string;
|
|
var
|
|
N: TJvXMLNode;
|
|
begin
|
|
N := Self;
|
|
Result := Name;
|
|
while N.ParentNode <> nil do
|
|
begin
|
|
N := N.ParentNode;
|
|
Result := N.Name + '/' + Result;
|
|
end;
|
|
end;
|
|
|
|
// search recursively for a named node
|
|
|
|
function TJvXMLNode.FindNamedNode(const AName: string): TJvXMLNode;
|
|
var
|
|
I: Integer;
|
|
N: TJvXMLNode;
|
|
begin
|
|
Result := nil;
|
|
for I := 0 to Nodes.Count - 1 do
|
|
begin
|
|
N := TJvXMLNode(Nodes[I]);
|
|
if N.Name = AName then
|
|
begin
|
|
Result := N;
|
|
Break;
|
|
end
|
|
else
|
|
begin // Recurse
|
|
Result := N.FindNamedNode(AName);
|
|
if Result <> nil then
|
|
Break;
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
// add all found named Nodes to AList
|
|
|
|
procedure TJvXMLNode.FindNamedNodes(const AName: string; AList: TList);
|
|
var
|
|
I: Integer;
|
|
N: TJvXMLNode;
|
|
begin
|
|
for I := 0 to Nodes.Count - 1 do
|
|
begin
|
|
N := TJvXMLNode(Nodes[I]);
|
|
if N.Name = AName then
|
|
AList.Add(N);
|
|
// Recurse
|
|
N.FindNamedNodes(AName, AList);
|
|
end;
|
|
end;
|
|
|
|
// add recursively all Nodes to AList
|
|
// the list only contains pointers to the Nodes
|
|
// typecast to use, e.g. N:=TJvXMLNode(AList[0]);
|
|
|
|
procedure TJvXMLNode.GetAllNodes(AList: TList);
|
|
var
|
|
I: Integer;
|
|
N: TJvXMLNode;
|
|
begin
|
|
for I := 0 to Nodes.Count - 1 do
|
|
begin
|
|
N := TJvXMLNode(Nodes[I]);
|
|
AList.Add(N);
|
|
// Recurse
|
|
N.GetAllNodes(AList);
|
|
end;
|
|
end;
|
|
|
|
// add recursively all Nodes with matching named attribute to AList
|
|
// the list only contains pointers to the Nodes
|
|
// typecast to use, e.g. N:=TJvXMLNode(AList[0]);
|
|
|
|
procedure TJvXMLNode.FindNamedAttributes(const AName: string; AList: TList);
|
|
var
|
|
I: Integer;
|
|
begin
|
|
for I := 0 to Attributes.Count - 1 do
|
|
if TJvXMLAttribute(Attributes[I]).Name = AName then
|
|
begin
|
|
AList.Add(Self);
|
|
Break;
|
|
end;
|
|
for I := 0 to Nodes.Count - 1 do
|
|
TJvXMLNode(Nodes[I]).FindNamedAttributes(AName, AList);
|
|
end;
|
|
|
|
{
|
|
this procedure adds the node to AList when it matches the pattern
|
|
this will be the key procedure for XSL implementation
|
|
only basic matching is provided in the first release
|
|
path operators
|
|
/ child path
|
|
// recursive descent
|
|
. curren context or node
|
|
@ attribute
|
|
* wildcar
|
|
some examples
|
|
/ the root node only
|
|
book/author <author> elements that are children of <book> elements
|
|
// the root node and all Nodes below
|
|
//* all element Nodes below the root node
|
|
book//author <author> elements that are descendants of <book> elements
|
|
.//author <author elements that are descendants of the current element
|
|
* non-root elements, irrespective of the element Name
|
|
book/* elements that are children of <book> elements
|
|
book//* elements that are descendants of <book> elements
|
|
book/*/author <author> elements that are grandchildren of <book> elements
|
|
book/@print_date print_date attributes that are attached to <book> elements
|
|
*/@print_date print_date atrtributes that are attached to any elements
|
|
|
|
Index can be used to specify a particular node within a matching set
|
|
/booklist/book[0] First <book> node in root <booklist> element
|
|
/booklist/book[2] Third <book> node in root <booklist> element
|
|
/booklist/book[end()] Last <book> node in root <booklist> element
|
|
}
|
|
|
|
procedure TJvXMLNode.MatchPattern(const APattern: string; AList: TList);
|
|
begin
|
|
// to be implemented
|
|
end;
|
|
|
|
{select a node based on path info
|
|
e.g. booklist/book/category will find the first
|
|
<category> that is a child of <book> that is a child of <booklist>
|
|
}
|
|
|
|
function TJvXMLNode.SelectSingleNode(const APattern: string): TJvXMLNode;
|
|
var
|
|
NPattern, LFilter: string;
|
|
P, I: Integer;
|
|
N: TJvXMLNode;
|
|
ObjFilter: TJvXMLFilter;
|
|
begin
|
|
Result := nil;
|
|
if Nodes.Count = 0 then
|
|
Exit;
|
|
ObjFilter := nil;
|
|
try
|
|
P := Pos('/', APattern);
|
|
if P = 0 then
|
|
begin
|
|
ObjFilter := TJvXMLFilter.Create(APattern);
|
|
for I := 0 to Nodes.Count - 1 do
|
|
begin
|
|
N := TJvXMLNode(Nodes[I]);
|
|
if N.MatchFilter(ObjFilter) then
|
|
begin
|
|
Result := N;
|
|
Exit;
|
|
end;
|
|
end;
|
|
// not found;
|
|
end
|
|
else
|
|
begin
|
|
LFilter := Copy(APattern, 1, P - 1);
|
|
NPattern := Copy(APattern, P + 1, Length(APattern));
|
|
ObjFilter := TJvXMLFilter.Create(LFilter);
|
|
for I := 0 to Nodes.Count - 1 do
|
|
begin
|
|
N := TJvXMLNode(Nodes[I]);
|
|
if N.MatchFilter(ObjFilter) then
|
|
begin
|
|
Result := N.SelectSingleNode(NPattern);
|
|
if Result <> nil then
|
|
Exit;
|
|
end;
|
|
end;
|
|
end;
|
|
finally
|
|
ObjFilter.Free;
|
|
end;
|
|
end;
|
|
|
|
// filter contains Name + any filters between []
|
|
|
|
function TJvXMLNode.MatchFilter(AObjFilter: TJvXMLFilter): Boolean;
|
|
var
|
|
I, J: Integer;
|
|
A: TJvXMLAttribute;
|
|
N: TJvXMLNode;
|
|
AttName: string;
|
|
Atom: TJvXMLFilterAtom;
|
|
AttResult: Boolean;
|
|
|
|
function EvalAtom(const AValue: string): Boolean;
|
|
begin
|
|
Result := False;
|
|
case Atom.Operator of
|
|
xfoNOP:
|
|
Result := True;
|
|
xfoEQ:
|
|
Result := AValue = Atom.Value;
|
|
xfoIEQ:
|
|
Result := AnsiCompareText(AValue, Atom.Value) = 0;
|
|
xfoNE:
|
|
Result := AValue <> Atom.Value;
|
|
xfoINE:
|
|
Result := AnsiCompareText(AValue, Atom.Value) <> 0;
|
|
xfoGT:
|
|
try
|
|
Result := StrToFloat(AValue) > StrToFloat(Atom.Value);
|
|
except
|
|
end;
|
|
xfoIGT:
|
|
Result := AnsiCompareText(AValue, Atom.Value) > 0;
|
|
xfoLT:
|
|
try
|
|
Result := StrToFloat(AValue) < StrToFloat(Atom.Value);
|
|
except
|
|
end;
|
|
xfoILT:
|
|
Result := AnsiCompareText(AValue, Atom.Value) < 0;
|
|
xfoGE:
|
|
try
|
|
Result := StrToFloat(AValue) >= StrToFloat(Atom.Value);
|
|
except
|
|
end;
|
|
xfoIGE:
|
|
Result := AnsiCompareText(AValue, Atom.Value) >= 0;
|
|
xfoLE:
|
|
try
|
|
Result := StrToFloat(AValue) <= StrToFloat(Atom.Value);
|
|
except
|
|
end;
|
|
xfoILE:
|
|
Result := AnsiCompareText(AValue, Atom.Value) <= 0;
|
|
end;
|
|
end;
|
|
|
|
begin
|
|
Result := False;
|
|
AttResult := False;
|
|
if AObjFilter.Filters.Count = 0 then
|
|
begin // just filter on Name
|
|
Result := AObjFilter.Name = Name;
|
|
Exit;
|
|
end;
|
|
for I := 0 to AObjFilter.Filters.Count - 1 do
|
|
begin
|
|
Atom := TJvXMLFilterAtom(AObjFilter.Filters[I]);
|
|
if Atom.AttributeFilter then
|
|
begin
|
|
AttName := Atom.Name;
|
|
if AttName = '*' then
|
|
begin // match any attribute
|
|
if Attributes.Count = 0 then
|
|
Exit;
|
|
for J := 0 to Attributes.Count - 1 do
|
|
begin
|
|
A := TJvXMLAttribute(Attributes[J]);
|
|
AttResult := EvalAtom(A.Value);
|
|
if AttResult then
|
|
Break;
|
|
end;
|
|
if not AttResult then
|
|
Exit;
|
|
end
|
|
else
|
|
begin
|
|
A := GetNamedAttribute(AttName);
|
|
if (A = nil) or not EvalAtom(A.Value) then
|
|
Exit;
|
|
end;
|
|
end
|
|
else
|
|
begin
|
|
AttName := Atom.Name;
|
|
N := GetNamedNode(AttName);
|
|
if (N = nil) or not EvalAtom(N.Value) then
|
|
Exit;
|
|
end;
|
|
end;
|
|
Result := True;
|
|
end;
|
|
|
|
procedure TJvXMLNode.SelectNodes(APattern: string; AList: TList);
|
|
var
|
|
NPattern: string;
|
|
P, I: Integer;
|
|
N: TJvXMLNode;
|
|
LFilter: string;
|
|
ObjFilter: TJvXMLFilter;
|
|
Recurse: Boolean;
|
|
begin
|
|
if Nodes.Count = 0 then
|
|
Exit;
|
|
if Copy(APattern, 1, 2) = '//' then
|
|
begin //recursive
|
|
Delete(APattern, 1, 2);
|
|
Recurse := True;
|
|
end
|
|
else
|
|
Recurse := False;
|
|
P := Pos('/', APattern);
|
|
if P = 0 then
|
|
begin
|
|
LFilter := APattern;
|
|
ObjFilter := TJvXMLFilter.Create(LFilter);
|
|
for I := 0 to Nodes.Count - 1 do
|
|
begin
|
|
N := TJvXMLNode(Nodes[I]);
|
|
if N.MatchFilter(ObjFilter) then
|
|
AList.Add(N)
|
|
else
|
|
if Recurse then
|
|
N.SelectNodes('//' + APattern, AList);
|
|
end;
|
|
ObjFilter.Free;
|
|
end
|
|
else
|
|
begin
|
|
LFilter := Copy(APattern, 1, P - 1);
|
|
if Copy(APattern, P, 2) = '//' then
|
|
NPattern := Copy(APattern, P, Length(APattern))
|
|
else
|
|
NPattern := Copy(APattern, P + 1, Length(APattern));
|
|
ObjFilter := TJvXMLFilter.Create(LFilter);
|
|
for I := 0 to Nodes.Count - 1 do
|
|
begin
|
|
N := TJvXMLNode(Nodes[I]);
|
|
if N.MatchFilter(ObjFilter) then
|
|
N.SelectNodes(NPattern, AList)
|
|
else
|
|
if Recurse then
|
|
N.SelectNodes('//' + APattern, AList);
|
|
end;
|
|
ObjFilter.Free;
|
|
end;
|
|
end;
|
|
|
|
// the XSL implementation
|
|
// although this function returns a string, the string itself can be parsed to Create a DOM
|
|
|
|
function TJvXMLNode.TransformNode(AStyleSheet: TJvXMLNode): string;
|
|
begin
|
|
// to be implemented;
|
|
Result := AStyleSheet.Process(0, Self);
|
|
end;
|
|
|
|
// used in conjunction with the TransformNode function.
|
|
// basically works like the Document function except for Nodes with processing instructions
|
|
|
|
function TJvXMLNode.Process(ALevel: Integer; ANode: TJvXMLNode): string;
|
|
var
|
|
I: Integer;
|
|
Indent: string;
|
|
|
|
function ExpandCDATA(const AValue: string): string;
|
|
begin
|
|
Result := StringReplace(AValue, '\n ', sLineBreak, [rfReplaceAll]);
|
|
Result := StringReplace(Result, '\t ', Tab, [rfReplaceAll]);
|
|
end;
|
|
|
|
begin
|
|
if ParentNode = nil then
|
|
begin
|
|
for I := 0 to Nodes.Count - 1 do
|
|
Result := Result + TJvXMLNode(Nodes[I]).Process(ALevel + 1, ANode);
|
|
Exit;
|
|
end;
|
|
if ALevel > 0 then
|
|
Indent := StringOfChar(' ', ALevel * 2)
|
|
else
|
|
Indent := '';
|
|
Result := Indent + '<' + Name;
|
|
for I := 0 to Attributes.Count - 1 do
|
|
Result := Result + TJvXMLAttribute(Attributes[I]).Document;
|
|
if (Nodes.Count = 0) and (Value = '') then
|
|
begin
|
|
Result := Result + ' />' + sLineBreak;
|
|
Exit;
|
|
end
|
|
else
|
|
Result := Result + '>' + sLineBreak;
|
|
if Value <> '' then
|
|
begin
|
|
if ValueType = xvtString then
|
|
Result := Result + Indent + ' ' + Value + sLineBreak
|
|
else
|
|
if ValueType = xvtCDATA then
|
|
Result := Result + Indent + ' ' + '<![CDATA[' + ExpandCDATA(Value) + ']]>' + sLineBreak;
|
|
end;
|
|
for I := 0 to Nodes.Count - 1 do
|
|
Result := Result + TJvXMLNode(Nodes[I]).Process(ALevel + 1, ANode);
|
|
Result := Result + Indent + '</' + Name + '>' + sLineBreak;
|
|
end;
|
|
|
|
function TJvXMLNode.GetNameSpace: string;
|
|
var
|
|
P: Integer;
|
|
begin
|
|
P := Pos(':', FName);
|
|
if P > 0 then
|
|
Result := Copy(FName, 1, P - 1)
|
|
else
|
|
Result := '';
|
|
end;
|
|
|
|
// find the node with a path like customers/regional/jansoft
|
|
|
|
function TJvXMLNode.GetNamePathNode(const APath: string): TJvXMLNode;
|
|
var
|
|
AName, NewPath, SIndex: string;
|
|
I, P, Index, IndexC: Integer;
|
|
N: TJvXMLNode;
|
|
begin
|
|
Result := nil;
|
|
if Nodes.Count = 0 then
|
|
Exit;
|
|
if APath = '' then
|
|
begin
|
|
Result := Self;
|
|
Exit;
|
|
end;
|
|
P := PosStr('/', APath, 1);
|
|
if P = 0 then
|
|
begin
|
|
AName := APath;
|
|
NewPath := '';
|
|
end
|
|
else
|
|
begin
|
|
AName := Copy(APath, 1, P - 1);
|
|
NewPath := Copy(APath, P + 1, Length(APath));
|
|
end;
|
|
// now check for any Index []
|
|
P := PosStr('[', AName, 1);
|
|
Index := 0; // search first by default
|
|
IndexC := 0;
|
|
if P > 0 then
|
|
begin
|
|
SIndex := Copy(AName, P + 1, Length(AName) - P - 1);
|
|
AName := Copy(AName, 1, P - 1);
|
|
if SIndex = 'end' then
|
|
Index := -1
|
|
else
|
|
try
|
|
Index := StrToInt(SIndex);
|
|
if Index >= Nodes.Count then
|
|
Exit;
|
|
except
|
|
Exit;
|
|
end;
|
|
end;
|
|
if Index = -1 then // search end from end
|
|
for I := Nodes.Count - 1 downto 0 do
|
|
begin
|
|
N := TJvXMLNode(Nodes[I]);
|
|
if N.Name = AName then
|
|
if NewPath = '' then
|
|
begin
|
|
Result := N;
|
|
Exit;
|
|
end
|
|
else
|
|
begin
|
|
Result := N.GetNamePathNode(NewPath);
|
|
Exit;
|
|
end;
|
|
end
|
|
else // search from beginning indexed
|
|
for I := 0 to Nodes.Count - 1 do
|
|
begin
|
|
N := TJvXMLNode(Nodes[I]);
|
|
if N.Name = AName then
|
|
if Index = IndexC then
|
|
begin
|
|
if NewPath = '' then
|
|
begin
|
|
Result := N;
|
|
Exit;
|
|
end
|
|
else
|
|
begin
|
|
Result := N.GetNamePathNode(NewPath);
|
|
Exit;
|
|
end;
|
|
end
|
|
else
|
|
Inc(IndexC);
|
|
end;
|
|
end;
|
|
|
|
function TJvXMLNode.ForceNamePathNode(const APath: string): TJvXMLNode;
|
|
var
|
|
AName, NewPath: string;
|
|
I, P: Integer;
|
|
N: TJvXMLNode;
|
|
DoAppend: Boolean;
|
|
begin
|
|
// Result:=nil;
|
|
P := PosStr('/', APath, 1);
|
|
if P = 0 then
|
|
begin
|
|
AName := APath;
|
|
NewPath := '';
|
|
end
|
|
else
|
|
begin
|
|
AName := Copy(APath, 1, P - 1);
|
|
NewPath := Copy(APath, P + 1, Length(APath));
|
|
end;
|
|
P := PosStr('+', AName, 1);
|
|
if P > 0 then
|
|
Delete(AName, P, 1);
|
|
DoAppend := P > 0;
|
|
if not DoAppend then
|
|
for I := 0 to Nodes.Count - 1 do
|
|
begin
|
|
N := TJvXMLNode(Nodes[I]);
|
|
if N.Name = AName then
|
|
if NewPath = '' then
|
|
begin
|
|
Result := N;
|
|
Exit;
|
|
end
|
|
else
|
|
begin
|
|
Result := N.ForceNamePathNode(NewPath);
|
|
Exit;
|
|
end;
|
|
end;
|
|
// we dont have it , so force it;
|
|
N := TJvXMLNode.Create(AName, '', Self);
|
|
Nodes.Add(N);
|
|
if NewPath = '' then
|
|
Result := N
|
|
else
|
|
Result := N.ForceNamePathNode(NewPath);
|
|
end;
|
|
|
|
function TJvXMLNode.ForceNamePathNodeAttribute(const APath, AName: string;
|
|
AValue: Variant): TJvXMLAttribute;
|
|
var
|
|
N: TJvXMLNode;
|
|
A: TJvXMLAttribute;
|
|
begin
|
|
Result := nil;
|
|
N := ForceNamePathNode(APath);
|
|
if N = nil then
|
|
Exit;
|
|
A := N.GetNamedAttribute(AName);
|
|
if A <> nil then
|
|
begin
|
|
A.Value := AValue;
|
|
Result := A;
|
|
end
|
|
else
|
|
Result := N.AddAttribute(AName, AValue);
|
|
end;
|
|
|
|
function TJvXMLNode.GetNamePathNodeAttribute(const APath, AName: string): TJvXMLAttribute;
|
|
var
|
|
N: TJvXMLNode;
|
|
begin
|
|
Result := nil;
|
|
N := GetNamePathNode(APath);
|
|
if N = nil then
|
|
Exit;
|
|
Result := N.GetNamedAttribute(AName);
|
|
end;
|
|
|
|
procedure TJvXMLNode.DeleteNamePathNode(const APath: string);
|
|
var
|
|
N, PN: TJvXMLNode;
|
|
I: Integer;
|
|
begin
|
|
if APath = '' then
|
|
Exit;
|
|
N := GetNamePathNode(APath);
|
|
if N = nil then
|
|
Exit;
|
|
PN := N.ParentNode;
|
|
for I := 0 to PN.Nodes.Count - 1 do
|
|
if TJvXMLNode(PN.Nodes[I]) = N then
|
|
begin
|
|
PN.DeleteNode(I);
|
|
Exit;
|
|
end;
|
|
end;
|
|
|
|
procedure TJvXMLNode.DeleteNamePathNodeAttribute(const APath, AName: string);
|
|
var
|
|
A: TJvXMLAttribute;
|
|
PN: TJvXMLNode;
|
|
I: Integer;
|
|
begin
|
|
A := GetNamePathNodeAttribute(APath, AName);
|
|
if A = nil then
|
|
Exit;
|
|
PN := A.Parent;
|
|
for I := 0 to PN.Attributes.Count - 1 do
|
|
if TJvXMLAttribute(PN.Attributes[I]) = A then
|
|
begin
|
|
PN.DeleteAttribute(I);
|
|
Exit;
|
|
end;
|
|
end;
|
|
|
|
function TJvXMLNode.GetAttributeValue(const AName: string): Variant;
|
|
var
|
|
I: Integer;
|
|
A: TJvXMLAttribute;
|
|
begin
|
|
Result := Null;
|
|
for I := 0 to Attributes.Count - 1 do
|
|
begin
|
|
A := TJvXMLAttribute(Attributes[I]);
|
|
if A.Name = AName then
|
|
begin
|
|
Result := A.Value;
|
|
Exit;
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
//=== { TJvXMLTree } =========================================================
|
|
|
|
constructor TJvXMLTree.Create(const AName: string; AValue: Variant; AParent: TJvXMLNode);
|
|
begin
|
|
inherited Create(AName, AValue, AParent);
|
|
FLines := TStringList.Create;
|
|
end;
|
|
|
|
destructor TJvXMLTree.Destroy;
|
|
begin
|
|
FLines.Free;
|
|
inherited Destroy;
|
|
end;
|
|
|
|
function TJvXMLTree.AsText: string;
|
|
var
|
|
I: Integer;
|
|
begin
|
|
if Nodes.Count = 0 then
|
|
Exit;
|
|
Result := '<' + Name;
|
|
if Attributes.Count > 0 then
|
|
for I := 0 to Attributes.Count - 1 do
|
|
Result := Result + TJvXMLAttribute(Attributes[I]).Document;
|
|
Result := Result + '>' + sLineBreak;
|
|
for I := 0 to Nodes.Count - 1 do
|
|
Result := Result + TJvXMLNode(Nodes[I]).Document(1);
|
|
Result := Result + '</' + Name + '>' + sLineBreak;
|
|
end;
|
|
|
|
procedure TJvXMLTree.SaveToFile(const FileName: string);
|
|
begin
|
|
Lines.Text := Text;
|
|
Lines.SaveToFile(FileName);
|
|
end;
|
|
|
|
function TJvXMLTree.GetLines: TStrings;
|
|
begin
|
|
Result := FLines;
|
|
end;
|
|
|
|
procedure TJvXMLTree.SetLines(const Value: TStrings);
|
|
begin
|
|
FLines.Assign(Value);
|
|
end;
|
|
|
|
procedure TJvXMLTree.LoadFromStream(Stream: TStream);
|
|
begin
|
|
ClearNodes;
|
|
ClearAttributes;
|
|
Lines.LoadFromStream(Stream);
|
|
PreProcessXML(Lines);
|
|
ParseXML;
|
|
end;
|
|
|
|
procedure TJvXMLTree.SaveToStream(Stream: TStream);
|
|
begin
|
|
Lines.Text := AsText;
|
|
Lines.SaveToStream(Stream);
|
|
end;
|
|
|
|
function TJvXMLTree.GetText: string;
|
|
var
|
|
I: Integer;
|
|
begin
|
|
// Result:='<'+Name;
|
|
// if Attributes.Count>0 then
|
|
// for I:=0 to Attributes.Count-1 do
|
|
// Result:=Result+TJvXMLAttribute(Attributes[I]).Document;
|
|
// Result:=Result+'>'+sLineBreak;
|
|
Result := '';
|
|
for I := 0 to Nodes.Count - 1 do
|
|
Result := Result + TJvXMLNode(Nodes[I]).Document(0);
|
|
// Result:=Result+'</'+Name+'>'+sLineBreak;
|
|
end;
|
|
|
|
procedure TJvXMLTree.SetText(const Value: string);
|
|
begin
|
|
ClearNodes;
|
|
ClearAttributes;
|
|
Lines.Text := Value;
|
|
PreProcessXML(Lines);
|
|
ParseXML;
|
|
end;
|
|
|
|
//=== { TJvXMLAttribute } ====================================================
|
|
|
|
constructor TJvXMLAttribute.Create(AParent: TJvXMLNode; const AName: string; AValue: Variant);
|
|
begin
|
|
inherited Create;
|
|
FName := AName;
|
|
FValue := AValue;
|
|
FParent := AParent;
|
|
end;
|
|
|
|
function TJvXMLAttribute.Document: string;
|
|
var
|
|
S: string;
|
|
begin
|
|
S := Value;
|
|
Result := ' ' + Name + '="' + S + '"';
|
|
end;
|
|
|
|
//=== { TJvXMLTree } =========================================================
|
|
|
|
procedure TJvXMLTree.ParseXML;
|
|
var
|
|
I, C: Integer;
|
|
S, Token, AName: string;
|
|
N: TJvXMLNode;
|
|
begin
|
|
FNodeCount := 0;
|
|
ClearNodes;
|
|
ClearAttributes;
|
|
Name := 'root';
|
|
N := Self;
|
|
C := Lines.Count - 1;
|
|
I := 0;
|
|
while I <= C do
|
|
begin
|
|
S := Lines[I];
|
|
Token := Copy(S, 1, 3);
|
|
AName := Copy(S, 4, Length(S));
|
|
if Token = 'OT:' then
|
|
begin
|
|
N := N.AddNodeEx(AName, '');
|
|
Inc(FNodeCount);
|
|
end
|
|
else
|
|
if Token = 'CT:' then
|
|
N := N.ParentNode
|
|
else
|
|
if Token = 'ET:' then
|
|
N.AddNodeEx(AName, '')
|
|
else
|
|
if Token = 'TX:' then
|
|
begin
|
|
N.Value := AName;
|
|
N.ValueType := xvtString;
|
|
end
|
|
else
|
|
if Token = 'CD:' then
|
|
begin
|
|
N.Value := AName;
|
|
N.ValueType := xvtCDATA;
|
|
end;
|
|
Inc(I);
|
|
end;
|
|
end;
|
|
|
|
procedure TJvXMLTree.LoadFromFile(const FileName: string);
|
|
begin
|
|
ClearNodes;
|
|
ClearAttributes;
|
|
Lines.LoadFromFile(FileName);
|
|
PreProcessXML(Lines);
|
|
ParseXML;
|
|
end;
|
|
|
|
//=== { TJvXMLFilter } =======================================================
|
|
|
|
constructor TJvXMLFilter.Create(const FilterStr: string);
|
|
begin
|
|
inherited Create;
|
|
Filters := TList.Create;
|
|
Initialize(FilterStr);
|
|
end;
|
|
|
|
destructor TJvXMLFilter.Destroy;
|
|
var
|
|
I: Integer;
|
|
begin
|
|
for I := 0 to Filters.Count - 1 do
|
|
TJvXMLFilterAtom(Filters[I]).Free;
|
|
Filters.Free;
|
|
inherited Destroy;
|
|
end;
|
|
|
|
procedure TJvXMLFilter.Initialize(FilterStr: string);
|
|
var
|
|
LFilter: string;
|
|
P1, P2: Integer;
|
|
AttName, AttValue: string;
|
|
AttOperator: TJvXMLFilterOperator;
|
|
Atom: TJvXMLFilterAtom;
|
|
// A: TJvXMLAttribute;
|
|
// N: TJvXMLNode;
|
|
|
|
function TrimQuotes(const S: string): string;
|
|
var
|
|
L: Integer;
|
|
begin
|
|
Result := Trim(S);
|
|
if S = '' then
|
|
Exit;
|
|
if (S[1] = '"') or (S[1] = '''') then
|
|
Delete(Result, 1, 1);
|
|
if S = '' then
|
|
Exit;
|
|
L := Length(Result);
|
|
if (Result[L] = '"') or (Result[L] = '''') then
|
|
Delete(Result, L, 1);
|
|
end;
|
|
|
|
function SplitNameValue(const S: string): Boolean;
|
|
var
|
|
PP: Integer;
|
|
begin
|
|
// (rom) inefficient implementation
|
|
// Result:=False;
|
|
PP := PosStr(' $ne$ ', S, 1);
|
|
if PP > 0 then
|
|
begin
|
|
AttOperator := xfoNE;
|
|
AttName := Trim(Copy(S, 1, PP - 1));
|
|
AttValue := TrimQuotes(Copy(S, PP + 6, Length(S)));
|
|
Result := (AttName <> '') and (AttValue <> '');
|
|
Exit;
|
|
end;
|
|
PP := PosStr(' $ine$ ', S, 1);
|
|
if PP > 0 then
|
|
begin
|
|
AttOperator := xfoINE;
|
|
AttName := Trim(Copy(S, 1, PP - 1));
|
|
AttValue := TrimQuotes(Copy(S, PP + 7, Length(S)));
|
|
Result := (AttName <> '') and (AttValue <> '');
|
|
Exit;
|
|
end;
|
|
PP := PosStr(' $ge$ ', S, 1);
|
|
if PP > 0 then
|
|
begin
|
|
AttOperator := xfoGE;
|
|
AttName := Trim(Copy(S, 1, PP - 1));
|
|
AttValue := TrimQuotes(Copy(S, PP + 6, Length(S)));
|
|
Result := (AttName <> '') and (AttValue <> '');
|
|
Exit;
|
|
end;
|
|
PP := PosStr(' $ige$ ', S, 1);
|
|
if PP > 0 then
|
|
begin
|
|
AttOperator := xfoIGE;
|
|
AttName := Trim(Copy(S, 1, PP - 1));
|
|
AttValue := TrimQuotes(Copy(S, PP + 7, Length(S)));
|
|
Result := (AttName <> '') and (AttValue <> '');
|
|
Exit;
|
|
end;
|
|
PP := PosStr(' $gt$ ', S, 1);
|
|
if PP > 0 then
|
|
begin
|
|
AttOperator := xfoGT;
|
|
AttName := Trim(Copy(S, 1, PP - 1));
|
|
AttValue := TrimQuotes(Copy(S, PP + 6, Length(S)));
|
|
Result := (AttName <> '') and (AttValue <> '');
|
|
Exit;
|
|
end;
|
|
PP := PosStr(' $igt$ ', S, 1);
|
|
if PP > 0 then
|
|
begin
|
|
AttOperator := xfoIGT;
|
|
AttName := Trim(Copy(S, 1, PP - 1));
|
|
AttValue := TrimQuotes(Copy(S, PP + 7, Length(S)));
|
|
Result := (AttName <> '') and (AttValue <> '');
|
|
Exit;
|
|
end;
|
|
PP := PosStr(' $le$ ', S, 1);
|
|
if PP > 0 then
|
|
begin
|
|
AttOperator := xfoLE;
|
|
AttName := Trim(Copy(S, 1, PP - 1));
|
|
AttValue := TrimQuotes(Copy(S, PP + 6, Length(S)));
|
|
Result := (AttName <> '') and (AttValue <> '');
|
|
Exit;
|
|
end;
|
|
PP := PosStr(' $ile$ ', S, 1);
|
|
if PP > 0 then
|
|
begin
|
|
AttOperator := xfoILE;
|
|
AttName := Trim(Copy(S, 1, PP - 1));
|
|
AttValue := TrimQuotes(Copy(S, PP + 7, Length(S)));
|
|
Result := (AttName <> '') and (AttValue <> '');
|
|
Exit;
|
|
end;
|
|
PP := PosStr(' $lt$ ', S, 1);
|
|
if PP > 0 then
|
|
begin
|
|
AttOperator := xfoLT;
|
|
AttName := Trim(Copy(S, 1, PP - 1));
|
|
AttValue := TrimQuotes(Copy(S, PP + 6, Length(S)));
|
|
Result := (AttName <> '') and (AttValue <> '');
|
|
Exit;
|
|
end;
|
|
PP := PosStr(' $ilt$ ', S, 1);
|
|
if PP > 0 then
|
|
begin
|
|
AttOperator := xfoILT;
|
|
AttName := Trim(Copy(S, 1, PP - 1));
|
|
AttValue := TrimQuotes(Copy(S, PP + 7, Length(S)));
|
|
Result := (AttName <> '') and (AttValue <> '');
|
|
Exit;
|
|
end;
|
|
PP := PosStr(' $eq$ ', S, 1);
|
|
if PP > 0 then
|
|
begin
|
|
AttOperator := xfoEQ;
|
|
AttName := Trim(Copy(S, 1, PP - 1));
|
|
AttValue := TrimQuotes(Copy(S, PP + 6, Length(S)));
|
|
Result := (AttName <> '') and (AttValue <> '');
|
|
Exit;
|
|
end;
|
|
PP := PosStr(' $ieq$ ', S, 1);
|
|
if PP > 0 then
|
|
begin
|
|
AttOperator := xfoIEQ;
|
|
AttName := Trim(Copy(S, 1, PP - 1));
|
|
AttValue := TrimQuotes(Copy(S, PP + 7, Length(S)));
|
|
Result := (AttName <> '') and (AttValue <> '');
|
|
Exit;
|
|
end;
|
|
PP := PosStr(' = ', S, 1);
|
|
if PP > 0 then
|
|
begin
|
|
AttOperator := xfoEQ;
|
|
AttName := Trim(Copy(S, 1, PP - 1));
|
|
AttValue := TrimQuotes(Copy(S, PP + 3, Length(S)));
|
|
Result := (AttName <> '') and (AttValue <> '');
|
|
Exit;
|
|
end;
|
|
AttOperator := xfoNOP;
|
|
AttName := S;
|
|
AttValue := '';
|
|
Result := True;
|
|
Exit;
|
|
end;
|
|
|
|
begin
|
|
P1 := PosStr('[', FilterStr, 1);
|
|
if P1 = 0 then
|
|
begin // just a Name filter on Name
|
|
Name := FilterStr;
|
|
Exit;
|
|
end
|
|
else
|
|
begin
|
|
Name := Copy(FilterStr, 1, P1 - 1);
|
|
Delete(FilterStr, 1, P1 - 1);
|
|
end;
|
|
repeat
|
|
FilterStr := Trim(FilterStr);
|
|
P1 := PosStr('[', FilterStr, 1);
|
|
if P1 = 0 then
|
|
Exit;
|
|
P2 := PosStr(']', FilterStr, P1 + 1);
|
|
if P2 = 0 then
|
|
Exit;
|
|
LFilter := Copy(FilterStr, P1 + 1, P2 - P1 - 1);
|
|
Delete(FilterStr, 1, P2);
|
|
if LFilter = '' then
|
|
Exit;
|
|
// check for attribute filter
|
|
if LFilter[1] = '@' then
|
|
begin
|
|
if not SplitNameValue(Copy(LFilter, 2, Length(LFilter))) then
|
|
Exit;
|
|
Atom := TJvXMLFilterAtom.Create;
|
|
Atom.Name := AttName;
|
|
Atom.Operator := AttOperator;
|
|
Atom.Value := AttValue;
|
|
Atom.AttributeFilter := True;
|
|
Filters.Add(Atom);
|
|
end
|
|
else
|
|
begin // childfilter
|
|
if not SplitNameValue(LFilter) then
|
|
Exit;
|
|
Atom := TJvXMLFilterAtom.Create;
|
|
Atom.Name := AttName;
|
|
Atom.Operator := AttOperator;
|
|
Atom.Value := AttValue;
|
|
Atom.AttributeFilter := False;
|
|
Filters.Add(Atom);
|
|
end;
|
|
until FilterStr = '';
|
|
end;
|
|
|
|
{$IFDEF UNITVERSIONING}
|
|
initialization
|
|
RegisterUnitVersion(HInstance, UnitVersioning);
|
|
|
|
finalization
|
|
UnregisterUnitVersion(HInstance);
|
|
{$ENDIF UNITVERSIONING}
|
|
|
|
end.
|
|
|