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1 /* |
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2 * Copyright (c) 2003 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: XML DOM Implementation source file |
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15 * |
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16 */ |
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17 |
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18 |
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19 #include "SVGXmlElementImpl.h" |
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20 #include "SVGXmlDocument.h" |
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21 |
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22 // --------------------------------------------------------------------------- |
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23 // This method acts like a ConstructL. |
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24 // This class is never instantiated |
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25 // The derived classes that are instantiated, call this method within |
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26 // their ConstructL methods |
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27 // --------------------------------------------------------------------------- |
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28 |
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29 void CXmlElementImpl::InitializeL( const TUint8 aElemID ) |
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30 { |
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31 iElemID=aElemID; |
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32 } |
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33 |
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34 // --------------------------------------------------------------------------- |
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35 // Accessor for the integer ID of the current element |
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36 // --------------------------------------------------------------------------- |
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37 TUint8 CXmlElementImpl::ElemID() |
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38 { |
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39 return iElemID; |
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40 } |
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41 |
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42 |
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43 // --------------------------------------------------------------------------- |
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44 // Destructor |
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45 // --------------------------------------------------------------------------- |
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46 CXmlElementImpl::~CXmlElementImpl() |
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47 { |
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48 |
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49 CXmlElementImpl* child = (CXmlElementImpl*)FirstChild(); |
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50 while ( child != NULL ) |
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51 { |
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52 CXmlElementImpl* sibling = (CXmlElementImpl*)child->NextSibling(); |
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53 delete child; |
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54 child = sibling; |
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55 } |
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56 } |
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57 |
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58 // --------------------------------------------------------------------------- |
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59 // Set the value for a given attribute |
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60 // --------------------------------------------------------------------------- |
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61 TInt CXmlElementImpl::SetAttributeL( const TDesC& /* aName */, |
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62 const TDesC& /* aValue */ ) |
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63 { |
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64 return KErrNone; |
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65 } |
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66 |
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67 // --------------------------------------------------------------------------- |
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68 // Remove a given attribute |
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69 // At this time this method is not implemented |
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70 // --------------------------------------------------------------------------- |
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71 TInt CXmlElementImpl::RemoveAttribute( const TDesC& /* aName */ ) |
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72 { |
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73 return KErrNone; |
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74 } |
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75 |
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76 // --------------------------------------------------------------------------- |
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77 // Accessor for the tag name of the current element |
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78 // --------------------------------------------------------------------------- |
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79 const TDesC& CXmlElementImpl::TagName() |
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80 { |
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81 |
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82 HBufC *lEmptyBuf = NULL; |
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83 return *lEmptyBuf; |
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84 |
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85 } |
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86 |
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87 // --------------------------------------------------------------------------- |
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88 // Find out if the current element has child elements |
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89 // --------------------------------------------------------------------------- |
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90 TBool CXmlElementImpl::HasChildNodes() |
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91 { |
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92 return ( iFirstChild != NULL ); |
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93 } |
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94 |
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95 // --------------------------------------------------------------------------- |
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96 // Accessor for the first child object of the current element |
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97 // --------------------------------------------------------------------------- |
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98 MXmlElement* CXmlElementImpl::FirstChild() |
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99 { |
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100 return iFirstChild; |
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101 } |
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102 |
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103 // --------------------------------------------------------------------------- |
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104 // Accessor for the last child object of the current element |
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105 // --------------------------------------------------------------------------- |
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106 MXmlElement* CXmlElementImpl::LastChild() |
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107 { |
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108 return iLastChild; |
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109 } |
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110 |
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111 // --------------------------------------------------------------------------- |
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112 // Accessor for the document object of the current element |
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113 // --------------------------------------------------------------------------- |
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114 MXmlDocument* CXmlElementImpl::OwnerDocument() |
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115 { |
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116 return iOwnerDocument; |
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117 } |
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118 |
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119 // --------------------------------------------------------------------------- |
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120 // Accessor for the next sibling (element) object of the current element |
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121 // --------------------------------------------------------------------------- |
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122 MXmlElement* CXmlElementImpl::NextSibling() |
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123 { |
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124 return iNextSibling; |
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125 } |
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126 |
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127 // --------------------------------------------------------------------------- |
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128 // Accessor for the previous sibling (element) object of the current element |
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129 // --------------------------------------------------------------------------- |
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130 MXmlElement* CXmlElementImpl::PreviousSibling() |
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131 { |
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132 CXmlElementImpl* sibling = this; |
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133 CXmlElementImpl* previousSibling = NULL; |
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134 |
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135 while ( sibling != NULL ) |
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136 { |
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137 sibling = (CXmlElementImpl*)sibling->NextSibling(); |
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138 |
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139 if (sibling == this) |
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140 { |
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141 return previousSibling; |
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142 } |
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143 |
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144 previousSibling = sibling; |
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145 } |
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146 |
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147 return NULL; |
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148 } |
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149 |
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150 // --------------------------------------------------------------------------- |
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151 // Accessor for the parent element object of the current element |
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152 // --------------------------------------------------------------------------- |
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153 MXmlElement* CXmlElementImpl::ParentNode() |
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154 { |
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155 return iParentNode; |
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156 } |
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157 |
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158 // --------------------------------------------------------------------------- |
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159 // Accessor to set the first child object of the current element |
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160 // --------------------------------------------------------------------------- |
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161 void CXmlElementImpl::SetFirstChild( MXmlElement* aElement ) |
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162 { |
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163 iFirstChild = aElement; |
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164 } |
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165 |
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166 // --------------------------------------------------------------------------- |
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167 // Accessor to set the last child object of the current element |
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168 // --------------------------------------------------------------------------- |
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169 void CXmlElementImpl::SetLastChild( MXmlElement* aElement ) |
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170 { |
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171 iLastChild = aElement; |
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172 } |
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173 |
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174 // --------------------------------------------------------------------------- |
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175 // Accessor to set the document object of the current element |
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176 // --------------------------------------------------------------------------- |
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177 void CXmlElementImpl::SetOwnerDocument( MXmlDocument* aElement ) |
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178 { |
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179 iOwnerDocument = aElement; |
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180 } |
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181 |
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182 // --------------------------------------------------------------------------- |
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183 // Accessor to set the next sibling (element) object of the current element |
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184 // --------------------------------------------------------------------------- |
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185 void CXmlElementImpl::SetNextSibling( MXmlElement* aElement ) |
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186 { |
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187 iNextSibling = aElement; |
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188 } |
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189 |
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190 // --------------------------------------------------------------------------- |
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191 // Accessor to set the parent element object of the current element |
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192 // --------------------------------------------------------------------------- |
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193 void CXmlElementImpl::SetParentNode( MXmlElement* aElement ) |
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194 { |
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195 iParentNode = aElement; |
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196 } |
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197 |
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198 // --------------------------------------------------------------------------- |
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199 // Append a new object as the child of the current element |
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200 // Place the new object in the proper location, as the last child |
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201 // --------------------------------------------------------------------------- |
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202 MXmlElement* CXmlElementImpl::AppendChildL( MXmlElement* aNewChild, TBool /*aIsJSR226Element*/ ) |
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203 { |
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204 // if no node was passed, then nothing to do |
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205 if ( aNewChild == NULL ) |
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206 { |
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207 return NULL; |
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208 } |
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209 |
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210 // first remove the node from its parent if it has one |
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211 MXmlElement* lparent = aNewChild->ParentNode(); |
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212 |
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213 |
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214 //AJD the parent != this needs to be removed so AppendChild works correctly |
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215 // if ( parent != NULL && parent != this) |
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216 |
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217 if ( lparent != NULL ) |
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218 { |
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219 lparent->RemoveChild(aNewChild); |
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220 } |
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221 |
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222 // Set the new node's parent |
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223 aNewChild->SetParentNode( this ); |
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224 // Set the new node's next sibling |
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225 aNewChild->SetNextSibling( NULL ); |
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226 // If previous sibling is tracked: |
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227 // Set the new node's previous sibling |
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228 // aNewChild->SetPreviousSibling(iXmlElementImpl->LastChild()); |
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229 // Set new node as the first child, if it is |
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230 if ( FirstChild() == NULL ) |
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231 { |
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232 SetFirstChild( aNewChild ); |
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233 } |
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234 // Set the new node as the next sibling of previously last child |
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235 MXmlElement* lLast = LastChild(); |
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236 if ( lLast ) |
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237 { |
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238 lLast->SetNextSibling( aNewChild ); |
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239 } |
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240 // Set the new node as last child |
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241 SetLastChild( aNewChild ); |
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242 |
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243 // notity of change to document |
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244 if ( iOwnerDocument ) |
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245 { |
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246 aNewChild->SetOwnerDocument(iOwnerDocument); |
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247 |
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248 iOwnerDocument->ElementAppendedOrRemoved(); |
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249 } |
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250 |
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251 return aNewChild; |
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252 } |
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253 |
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254 // --------------------------------------------------------------------------- |
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255 // Remove a given object from the list of child elements |
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256 // --------------------------------------------------------------------------- |
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257 void CXmlElementImpl::RemoveChild ( MXmlElement* aRemoveChild ) |
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258 { |
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259 if ( aRemoveChild ) |
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260 { |
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261 // the remove child is the first child |
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262 if ( FirstChild() == aRemoveChild ) |
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263 { |
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264 if( aRemoveChild->NextSibling() ) |
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265 { |
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266 SetFirstChild( aRemoveChild->NextSibling() ); |
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267 } |
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268 else |
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269 { |
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270 // the remove child is the only child |
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271 SetFirstChild( NULL ); |
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272 SetLastChild ( NULL ); |
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273 } |
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274 } |
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275 // the remove child is any sibling |
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276 else |
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277 { |
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278 // find the child pointing to remove child |
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279 MXmlElement*preSibling = FirstChild(); |
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280 if (preSibling) |
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281 { |
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282 while ( preSibling && (( preSibling->NextSibling() ) != aRemoveChild) ) |
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283 { |
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284 preSibling = preSibling->NextSibling(); |
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285 } |
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286 |
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287 if (preSibling) |
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288 { |
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289 // check if the remove child is the end child |
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290 if ( LastChild() != aRemoveChild ) |
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291 { |
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292 preSibling->SetNextSibling(aRemoveChild->NextSibling()); |
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293 } |
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294 else |
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295 { |
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296 SetLastChild(preSibling); |
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297 preSibling->SetNextSibling(NULL); |
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298 } |
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299 } |
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300 } |
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301 } |
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302 |
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303 // remove child |
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304 aRemoveChild->SetParentNode( NULL ); |
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305 aRemoveChild->SetNextSibling( NULL ); |
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306 } |
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307 |
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308 // notity of change to document |
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309 if ( iOwnerDocument ) |
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310 { |
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311 iOwnerDocument->ElementAppendedOrRemoved(); |
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312 } |
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313 } |
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314 |
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315 // --------------------------------------------------------------------------- |
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316 // Perform a deep clone of this object |
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317 // This method is not currently implemented |
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318 // --------------------------------------------------------------------------- |
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319 MXmlElement* CXmlElementImpl::CloneL(MXmlElement* ) |
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320 { |
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321 return NULL; |
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322 } |
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323 |
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324 // --------------------------------------------------------------------------- |
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325 // Copy the contents of this object to the passed object |
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326 // This method assumes that the passed object has already been |
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327 // Created using the proper NewL method. |
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328 // --------------------------------------------------------------------------- |
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329 void CXmlElementImpl::CopyL( CXmlElementImpl* aDestElement ) |
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330 { |
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331 |
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332 // copy the children and everything down the tree |
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333 MXmlElement* currentChild = FirstChild(); |
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334 |
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335 while ( currentChild != NULL) |
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336 { |
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337 MXmlElement* newElement = currentChild->CloneL(aDestElement); |
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338 if( newElement == NULL )/*Duplicate Cloning of Use returns NULL*/ |
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339 { |
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340 break; //breaking out of the while in case of loop |
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341 } |
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342 aDestElement->CXmlElementImpl::AppendChildL(newElement); |
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343 currentChild = currentChild->NextSibling(); |
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344 } |
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345 } |