1 | /* |
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2 | * Licensed to the Apache Software Foundation (ASF) under one or more |
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3 | * contributor license agreements. See the NOTICE file distributed with |
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4 | * this work for additional information regarding copyright ownership. |
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5 | * The ASF licenses this file to You under the Apache License, Version 2.0 |
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6 | * (the "License"); you may not use this file except in compliance with |
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7 | * the License. You may obtain a copy of the License at |
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8 | * |
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9 | * http://www.apache.org/licenses/LICENSE-2.0 |
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10 | * |
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11 | * Unless required by applicable law or agreed to in writing, software |
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12 | * distributed under the License is distributed on an "AS IS" BASIS, |
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13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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14 | * See the License for the specific language governing permissions and |
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15 | * limitations under the License. |
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16 | */ |
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17 | |
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18 | /* |
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19 | * $Id: DOM_CharacterData.hpp 568078 2007-08-21 11:43:25Z amassari $ |
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20 | */ |
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21 | |
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22 | #ifndef DOM_CharacterData_HEADER_GUARD_ |
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23 | #define DOM_CharacterData_HEADER_GUARD_ |
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24 | |
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25 | #include <xercesc/util/XercesDefs.hpp> |
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26 | #include "DOM_Node.hpp" |
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27 | |
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28 | XERCES_CPP_NAMESPACE_BEGIN |
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29 | |
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30 | |
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31 | class CharacterDataImpl; |
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32 | |
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33 | /** |
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34 | * The <code>DOM_CharacterData</code> interface extends Node with a set of |
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35 | * methods for accessing character data in the DOM. |
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36 | * |
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37 | * For clarity this set is defined here rather than on each class that uses |
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38 | * these methods. No DOM objects correspond directly to |
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39 | * <code>CharacterData</code>, though <code>Text</code> and others do inherit |
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40 | * the interface from it. All <code>offset</code>s in this interface start |
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41 | * from 0, and index in terms of Unicode 16 bit storage units. |
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42 | */ |
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43 | class DEPRECATED_DOM_EXPORT DOM_CharacterData: public DOM_Node { |
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44 | |
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45 | private: |
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46 | |
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47 | public: |
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48 | /** @name Constructors and assignment operator */ |
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49 | //@{ |
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50 | /** |
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51 | * Default constructor for DOM_CharacterData. While there can be |
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52 | * no actual DOM nodes of type CharacterData, the C++ objects |
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53 | * function more like reference variables, and instances of |
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54 | * <code>DOM_CharacterData</code> can exist. They will be null when created |
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55 | * by this constructor, and can then be assigned to refer to Text |
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56 | * or CDATASection nodes. |
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57 | */ |
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58 | DOM_CharacterData(); |
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59 | |
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60 | /** |
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61 | * Copy constructor |
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62 | * |
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63 | * @param other The object to be copied |
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64 | */ |
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65 | DOM_CharacterData(const DOM_CharacterData &other); |
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66 | /** |
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67 | * Assignment operator |
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68 | * |
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69 | * @param other The object to be copied |
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70 | */ |
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71 | DOM_CharacterData & operator = (const DOM_CharacterData &other); |
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72 | |
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73 | /** |
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74 | * Assignment operator. This overloaded variant is provided for |
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75 | * the sole purpose of setting a DOM_Node reference variable to |
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76 | * zero. Nulling out a reference variable in this way will decrement |
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77 | * the reference count on the underlying Node object that the variable |
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78 | * formerly referenced. This effect is normally obtained when reference |
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79 | * variable goes out of scope, but zeroing them can be useful for |
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80 | * global instances, or for local instances that will remain in scope |
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81 | * for an extended time, when the storage belonging to the underlying |
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82 | * node needs to be reclaimed. |
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83 | * |
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84 | * @param val Only a value of 0, or null, is allowed. |
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85 | */ |
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86 | DOM_CharacterData & operator = (const DOM_NullPtr *val); |
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87 | |
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88 | //@} |
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89 | /** @name Destructor. */ |
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90 | //@{ |
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91 | /** |
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92 | * Destructor for DOM_CharacterData. The object being destroyed |
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93 | * is the reference to the Character Data node, not the character |
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94 | * data itself. |
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95 | */ |
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96 | ~DOM_CharacterData(); |
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97 | |
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98 | |
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99 | //@} |
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100 | |
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101 | /** @name Getter functions. */ |
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102 | //@{ |
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103 | /** |
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104 | * Returns the character data of the node that implements this interface. |
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105 | * |
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106 | * The DOM implementation may not put arbitrary limits on the amount of data that |
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107 | * may be stored in a <code>CharacterData</code> node. However, |
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108 | * implementation limits may mean that the entirety of a node's data may |
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109 | * not fit into a single <code>DOMString</code>. In such cases, the user |
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110 | * may call <code>substringData</code> to retrieve the data in |
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111 | * appropriately sized pieces. |
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112 | * @exception DOMException |
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113 | * NO_MODIFICATION_ALLOWED_ERR: Raised when the node is readonly. |
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114 | * @exception DOMException |
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115 | * DOMSTRING_SIZE_ERR: Raised when it would return more characters than |
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116 | * fit in a <code>DOMString</code> variable on the implementation |
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117 | * platform. |
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118 | */ |
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119 | DOMString getData() const; |
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120 | /** |
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121 | * Returns the number of characters that are available through <code>data</code> and |
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122 | * the <code>substringData</code> method below. |
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123 | * |
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124 | * This may have the value |
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125 | * zero, i.e., <code>CharacterData</code> nodes may be empty. |
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126 | */ |
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127 | unsigned int getLength() const; |
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128 | /** |
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129 | * Extracts a range of data from the node. |
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130 | * |
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131 | * @param offset Start offset of substring to extract. |
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132 | * @param count The number of characters to extract. |
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133 | * @return The specified substring. If the sum of <code>offset</code> and |
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134 | * <code>count</code> exceeds the <code>length</code>, then all |
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135 | * characters to the end of the data are returned. |
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136 | * @exception DOMException |
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137 | * INDEX_SIZE_ERR: Raised if the specified offset is negative or greater |
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138 | * than the number of characters in <code>data</code>, or if the |
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139 | * specified <code>count</code> is negative. |
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140 | * <br>DOMSTRING_SIZE_ERR: Raised if the specified range of text does not |
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141 | * fit into a <code>DOMString</code>. |
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142 | */ |
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143 | DOMString substringData(unsigned int offset, |
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144 | unsigned int count) const; |
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145 | //@} |
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146 | /** @name Functions that set or change data. */ |
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147 | //@{ |
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148 | /** |
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149 | * Append the string to the end of the character data of the node. |
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150 | * |
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151 | * Upon success, <code>data</code> provides access to the concatenation of |
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152 | * <code>data</code> and the <code>DOMString</code> specified. |
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153 | * @param arg The <code>DOMString</code> to append. |
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154 | * @exception DOMException |
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155 | * NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly. |
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156 | */ |
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157 | void appendData(const DOMString &arg); |
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158 | /** |
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159 | * Insert a string at the specified character offset. |
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160 | * |
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161 | * @param offset The character offset at which to insert. |
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162 | * @param arg The <code>DOMString</code> to insert. |
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163 | * @exception DOMException |
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164 | * INDEX_SIZE_ERR: Raised if the specified offset is negative or greater |
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165 | * than the number of characters in <code>data</code>. |
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166 | * <br>NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly. |
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167 | */ |
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168 | void insertData(unsigned int offset, const DOMString &arg); |
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169 | /** |
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170 | * Remove a range of characters from the node. |
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171 | * |
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172 | * Upon success, |
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173 | * <code>data</code> and <code>length</code> reflect the change. |
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174 | * @param offset The offset from which to remove characters. |
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175 | * @param count The number of characters to delete. If the sum of |
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176 | * <code>offset</code> and <code>count</code> exceeds <code>length</code> |
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177 | * then all characters from <code>offset</code> to the end of the data |
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178 | * are deleted. |
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179 | * @exception DOMException |
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180 | * INDEX_SIZE_ERR: Raised if the specified offset is negative or greater |
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181 | * than the number of characters in <code>data</code>, or if the |
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182 | * specified <code>count</code> is negative. |
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183 | * <br>NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly. |
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184 | */ |
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185 | void deleteData(unsigned int offset, |
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186 | unsigned int count); |
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187 | /** |
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188 | * Replace the characters starting at the specified character offset with |
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189 | * the specified string. |
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190 | * |
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191 | * @param offset The offset from which to start replacing. |
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192 | * @param count The number of characters to replace. If the sum of |
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193 | * <code>offset</code> and <code>count</code> exceeds <code>length</code> |
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194 | * , then all characters to the end of the data are replaced (i.e., the |
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195 | * effect is the same as a <code>remove</code> method call with the same |
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196 | * range, followed by an <code>append</code> method invocation). |
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197 | * @param arg The <code>DOMString</code> with which the range must be |
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198 | * replaced. |
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199 | * @exception DOMException |
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200 | * INDEX_SIZE_ERR: Raised if the specified offset is negative or greater |
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201 | * than the number of characters in <code>data</code>, or if the |
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202 | * specified <code>count</code> is negative. |
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203 | * <br>NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly. |
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204 | */ |
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205 | void replaceData(unsigned int offset, |
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206 | unsigned int count, |
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207 | const DOMString &arg); |
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208 | |
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209 | /** |
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210 | * Sets the character data of the node that implements this interface. |
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211 | * |
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212 | * @param data The <code>DOMString</code> to set. |
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213 | */ |
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214 | void setData(const DOMString &data); |
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215 | //@} |
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216 | |
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217 | protected: |
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218 | DOM_CharacterData(CharacterDataImpl *impl); |
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219 | |
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220 | }; |
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221 | |
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222 | XERCES_CPP_NAMESPACE_END |
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223 | |
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224 | #endif |
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225 | |
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226 | |
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