| 1 | unit UXMLClasses;
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| 2 |
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| 3 | {$mode Delphi}{$H+}
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| 4 |
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| 5 | interface
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| 6 |
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| 7 | uses Classes, SysUtils, Contnrs, StrUtils;
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| 8 |
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| 9 | type
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| 10 | TStringListEx = class(TStringList)
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| 11 | public
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| 12 | procedure AddNameValue(Name, Value: string);
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| 13 | end;
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| 14 |
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| 15 | TXmlElement = class
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| 16 | private
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| 17 | function GetAsString: string; virtual;
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| 18 | public
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| 19 | property AsString: string read GetAsString;
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| 20 | end;
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| 21 |
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| 22 | TXmlString = class(TXmlElement)
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| 23 | private
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| 24 | function GetAsString: string; override;
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| 25 | public
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| 26 | Text: string;
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| 27 | end;
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| 28 |
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| 29 | TXmlTag = class(TXmlElement)
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| 30 | private
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| 31 | function GetAsString: string; override;
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| 32 | public
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| 33 | EndTagSymbol: Char;
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| 34 | TagName: string;
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| 35 | Attributes: TStringListEx;
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| 36 | SubElements: TList; // of TXmlElement;
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| 37 | constructor Create;
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| 38 | destructor Destroy; override;
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| 39 | end;
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| 40 |
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| 41 | TXmlDocument = class
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| 42 | private
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| 43 | function FormatStructure(Text: string): string;
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| 44 | function GetAsString: string;
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| 45 | public
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| 46 | Formated: Boolean;
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| 47 | MainTag: TXmlTag;
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| 48 | Content: TXmlTag;
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| 49 | XmlVersion: string;
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| 50 | Encoding: string;
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| 51 | constructor Create;
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| 52 | destructor Destroy; override;
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| 53 | property AsString: string read GetAsString;
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| 54 | end;
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| 55 |
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| 56 | implementation
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| 57 |
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| 58 | { THtmlElement }
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| 59 |
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| 60 | constructor TXmlTag.Create;
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| 61 | begin
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| 62 | Attributes := TStringListEx.Create;
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| 63 | Attributes.NameValueSeparator := '=';
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| 64 | SubElements := TList.Create;
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| 65 | EndTagSymbol := '/';
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| 66 | end;
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| 67 |
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| 68 | destructor TXmlTag.Destroy;
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| 69 | var
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| 70 | I: Integer;
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| 71 | begin
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| 72 | Attributes.Destroy;
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| 73 | for I := 0 to SubElements.Count - 1 do
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| 74 | TXmlElement(SubElements[I]).Destroy;
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| 75 | SubElements.Destroy;
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| 76 | inherited;
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| 77 | end;
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| 78 |
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| 79 | function TXmlTag.GetAsString: string;
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| 80 | var
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| 81 | AttributesText: string;
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| 82 | I: Integer;
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| 83 | Content: string;
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| 84 | begin
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| 85 | Content := '';
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| 86 | for I := 0 to SubElements.Count - 1 do
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| 87 | Content := Content + TXmlElement(SubElements[I]).AsString;
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| 88 |
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| 89 | AttributesText := '';
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| 90 | for I := 0 to Attributes.Count - 1 do
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| 91 | AttributesText := AttributesText + ' ' + Attributes.Names[I] + '="' + Attributes.ValueFromIndex[I] + '"';
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| 92 |
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| 93 | if TagName <> '' then begin
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| 94 | if Content <> '' then
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| 95 | Result := '<' + TagName + AttributesText + '>' + Content + '<' + EndTagSymbol + TagName + '>'
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| 96 | else Result := '<' + TagName + AttributesText + EndTagSymbol + '>';
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| 97 | end else Result := Content;
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| 98 | end;
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| 99 |
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| 100 | { TXmlString }
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| 101 |
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| 102 | function TXmlString.GetAsString: string;
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| 103 | begin
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| 104 | Result := Text;
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| 105 | end;
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| 106 |
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| 107 | { TXmlElement }
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| 108 |
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| 109 | function TXmlElement.GetAsString: string;
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| 110 | begin
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| 111 | Result := ''; // dodelat
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| 112 | end;
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| 113 |
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| 114 | { TXmlDocument }
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| 115 |
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| 116 | constructor TXmlDocument.Create;
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| 117 | begin
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| 118 | inherited;
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| 119 | Encoding := 'utf-8';
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| 120 | XmlVersion := '1.0';
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| 121 | MainTag := TXmlTag.Create;
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| 122 | with MainTag do begin
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| 123 | TagName := '?xml';
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| 124 | EndTagSymbol := '?';
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| 125 | Attributes.Add('version=1.0');
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| 126 | Attributes.Add('encoding=utf-8');
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| 127 | end;
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| 128 | Content := TXmlTag.Create;
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| 129 | end;
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| 130 |
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| 131 | destructor TXmlDocument.Destroy;
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| 132 | begin
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| 133 | Content.Destroy;
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| 134 | MainTag.Destroy;
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| 135 | inherited;
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| 136 | end;
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| 137 |
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| 138 | function TXmlDocument.FormatStructure(Text: string): string;
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| 139 | const
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| 140 | NewLine = #13#10;
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| 141 | var
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| 142 | IndentCount: Integer;
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| 143 | I: Integer;
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| 144 | LastPos: Integer;
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| 145 | Content: string;
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| 146 | begin
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| 147 | IndentCount := 0;
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| 148 | Result := '';
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| 149 | LastPos := 1;
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| 150 | I := 1;
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| 151 | while I < Length(Text) do begin
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| 152 | if Text[I] = '<' then begin
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| 153 | Content := Trim(Copy(Text, LastPos, I - LastPos));
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| 154 | if Length(Content) > 0 then
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| 155 | Result := Result + DupeString(' ', IndentCount) + Content + NewLine;
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| 156 | LastPos := I;
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| 157 | end;
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| 158 | if Text[I] = '>' then begin
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| 159 | if Text[LastPos + 1] = '/' then Dec(IndentCount);
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| 160 | Result := Result + DupeString(' ', IndentCount) + Copy(Text, LastPos, I - LastPos + 1)
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| 161 | + NewLine;
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| 162 | if (Text[LastPos + 1] <> '/') and (Text[I - 1] <> '/') and
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| 163 | (Text[I - 1] <> '?') and (Text[LastPos + 1] <> '!') then Inc(IndentCount);
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| 164 | LastPos := I + 1;
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| 165 | end;
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| 166 | Inc(I);
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| 167 | end;
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| 168 | if Text[LastPos + 1] = '/' then Dec(IndentCount);
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| 169 | Result := Result + DupeString(' ', IndentCount) + Copy(Text, LastPos, I - LastPos + 1)
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| 170 | + NewLine;
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| 171 | end;
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| 172 |
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| 173 | function TXmlDocument.GetAsString: string;
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| 174 | begin
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| 175 | Result := MainTag.AsString +
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| 176 | '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">'
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| 177 | + Content.AsString;
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| 178 | if Formated then Result := FormatStructure(Result);
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| 179 | end;
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| 180 |
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| 181 | { TStringListEx }
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| 182 |
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| 183 | procedure TStringListEx.AddNameValue(Name, Value: string);
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| 184 | begin
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| 185 | Add(Name + NameValueSeparator + Value);
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| 186 | end;
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| 187 |
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| 188 | end.
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