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.Free;
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73 | for I := 0 to SubElements.Count - 1 do TXmlElement(SubElements[I]).Free;
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74 | SubElements.Free;
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75 | inherited;
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76 | end;
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77 |
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78 | function TXmlTag.GetAsString: string;
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79 | var
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80 | AttributesText: string;
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81 | I: Integer;
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82 | Content: string;
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83 | begin
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84 | Content := '';
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85 | for I := 0 to SubElements.Count - 1 do
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86 | Content := Content + TXmlElement(SubElements[I]).AsString;
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87 |
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88 | AttributesText := '';
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89 | for I := 0 to Attributes.Count - 1 do
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90 | AttributesText := AttributesText + ' ' + Attributes.Names[I] + '="' + Attributes.ValueFromIndex[I] + '"';
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91 |
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92 | if TagName <> '' then begin
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93 | if Content <> '' then
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94 | Result := '<' + TagName + AttributesText + '>' + Content + '<' + EndTagSymbol + TagName + '>'
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95 | else Result := '<' + TagName + AttributesText + EndTagSymbol + '>';
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96 | end else Result := Content;
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97 | end;
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98 |
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99 | { TXmlString }
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100 |
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101 | function TXmlString.GetAsString: string;
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102 | begin
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103 | Result := Text;
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104 | end;
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105 |
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106 | { TXmlElement }
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107 |
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108 | function TXmlElement.GetAsString: string;
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109 | begin
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110 | Result := ''; // dodelat
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111 | end;
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112 |
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113 | { TXmlDocument }
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114 |
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115 | constructor TXmlDocument.Create;
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116 | begin
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117 | inherited;
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118 | Encoding := 'windows-1250';
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119 | XmlVersion := '1.0';
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120 | MainTag := TXmlTag.Create;
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121 | with MainTag do begin
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122 | TagName := '?xml';
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123 | EndTagSymbol := '?';
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124 | Attributes.Add('version=1.0');
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125 | Attributes.Add('encoding=windows-1250');
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126 | end;
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127 | Content := TXmlTag.Create;
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128 | end;
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129 |
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130 | destructor TXmlDocument.Destroy;
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131 | begin
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132 | Content.Free;
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133 | MainTag.Free;
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134 | inherited;
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135 | end;
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136 |
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137 | function TXmlDocument.FormatStructure(Text: string): string;
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138 | const
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139 | NewLine = #13#10;
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140 | var
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141 | IndentCount: Integer;
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142 | I: Integer;
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143 | LastPos: Integer;
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144 | Content: string;
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145 | begin
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146 | IndentCount := 0;
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147 | Result := '';
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148 | LastPos := 1;
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149 | I := 1;
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150 | while I < Length(Text) do begin
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151 | if Text[I] = '<' then begin
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152 | Content := Trim(Copy(Text, LastPos, I - LastPos));
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153 | if Length(Content) > 0 then
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154 | Result := Result + DupeString(' ', IndentCount) + Content + NewLine;
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155 | LastPos := I;
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156 | end;
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157 | if Text[I] = '>' then begin
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158 | if Text[LastPos + 1] = '/' then Dec(IndentCount);
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159 | Result := Result + DupeString(' ', IndentCount) + Copy(Text, LastPos, I - LastPos + 1)
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160 | + NewLine;
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161 | if (Text[LastPos + 1] <> '/') and (Text[I - 1] <> '/') and
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162 | (Text[I - 1] <> '?') and (Text[LastPos + 1] <> '!') then Inc(IndentCount);
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163 | LastPos := I + 1;
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164 | end;
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165 | Inc(I);
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166 | end;
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167 | if Text[LastPos + 1] = '/' then Dec(IndentCount);
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168 | Result := Result + DupeString(' ', IndentCount) + Copy(Text, LastPos, I - LastPos + 1)
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169 | + NewLine;
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170 | end;
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171 |
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172 | function TXmlDocument.GetAsString: string;
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173 | begin
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174 | Result := MainTag.AsString +
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175 | '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">'
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176 | + Content.AsString;
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177 | if Formated then Result := FormatStructure(Result);
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178 | end;
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179 |
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180 | { TStringListEx }
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181 |
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182 | procedure TStringListEx.AddNameValue(Name, Value: string);
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183 | begin
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184 | Add(Name + NameValueSeparator + Value);
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185 | end;
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186 |
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187 | end.
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