| 1 | // Copyright (C) 2006 Erik Dahlberg |
| 2 | // |
| 3 | // This file is part of LSystem3D. |
| 4 | // |
| 5 | // LSystem3D is free software; you can redistribute it and/or |
| 6 | // modify it under the terms of the GNU General Public License |
| 7 | // as published by the Free Software Foundation; either version 2 |
| 8 | // of the License, or (at your option) any later version. |
| 9 | // |
| 10 | // LSystem3D is distributed in the hope that it will be useful, |
| 11 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | // GNU General Public License for more details. |
| 14 | // |
| 15 | // You should have received a copy of the GNU General Public License |
| 16 | // along with LSystem3D; if not, write to the Free Software |
| 17 | // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 18 | |
| 19 | |
| 20 | |
| 21 | |
| 22 | #include <cstdlib> |
| 23 | |
| 24 | #include <sstream> |
| 25 | #include <string> |
| 26 | |
| 27 | #include <libxml++/attribute.h> |
| 28 | #include <libxml++/document.h> |
| 29 | #include <libxml++/nodes/element.h> |
| 30 | #include <libxml++/nodes/node.h> |
| 31 | #include <libxml++/parsers/domparser.h> |
| 32 | |
| 33 | #include "xmlstructure.h" |
| 34 | |
| 35 | using namespace std; |
| 36 | |
| 37 | |
| 38 | |
| 39 | /** |
| 40 | * Constructor |
| 41 | */ |
| 42 | XMLStructure::XMLStructure() |
| 43 | { |
| 44 | _rootElement = NULL; |
| 45 | _activeElement = NULL; |
| 46 | _activeDocument = NULL; |
| 47 | _activeChildInList = (xmlpp::Node::NodeList::iterator)NULL; |
| 48 | } |
| 49 | |
| 50 | |
| 51 | |
| 52 | /** |
| 53 | * Destructor |
| 54 | */ |
| 55 | XMLStructure::~XMLStructure() |
| 56 | { |
| 57 | delete _activeDocument; |
| 58 | } |
| 59 | |
| 60 | |
| 61 | |
| 62 | /** |
| 63 | * Create new document with root node |
| 64 | * @param rootName name of root |
| 65 | */ |
| 66 | void XMLStructure::createDocumentWithRoot(string rootName) |
| 67 | { |
| 68 | delete _activeDocument; |
| 69 | _activeDocument = new xmlpp::Document; |
| 70 | |
| 71 | _rootElement = _activeDocument->create_root_node(rootName); |
| 72 | } |
| 73 | |
| 74 | |
| 75 | |
| 76 | /** |
| 77 | * Add new child to root |
| 78 | * @param name name of child |
| 79 | */ |
| 80 | void XMLStructure::addChildToRoot(string name) |
| 81 | { |
| 82 | _activeElement = _rootElement->add_child(name); |
| 83 | } |
| 84 | |
| 85 | |
| 86 | |
| 87 | /** |
| 88 | * Add a string as content of current child |
| 89 | * @param text the text |
| 90 | */ |
| 91 | void XMLStructure::addString(string text) |
| 92 | { |
| 93 | _activeElement->add_child_text(text); |
| 94 | } |
| 95 | |
| 96 | |
| 97 | |
| 98 | /** |
| 99 | * Add a number as content of current child |
| 100 | * @param value the number |
| 101 | */ |
| 102 | void XMLStructure::addNumber(double value) |
| 103 | { |
| 104 | addString(doubleToString(value)); |
| 105 | } |
| 106 | |
| 107 | |
| 108 | |
| 109 | /** |
| 110 | * Add attribute to current child |
| 111 | * @param name name of attribute |
| 112 | * @param value value of attribute |
| 113 | */ |
| 114 | void XMLStructure::addAttribute(string name, string value) |
| 115 | { |
| 116 | _activeElement->set_attribute(name, value); |
| 117 | } |
| 118 | |
| 119 | |
| 120 | |
| 121 | /** |
| 122 | * Save document to file |
| 123 | * @param path path to file |
| 124 | */ |
| 125 | void XMLStructure::saveToDisk(string path) |
| 126 | { |
| 127 | _activeDocument->write_to_file_formatted(path); |
| 128 | } |
| 129 | |
| 130 | |
| 131 | |
| 132 | /** |
| 133 | * Load document from file |
| 134 | * @param path path to file |
| 135 | */ |
| 136 | void XMLStructure::loadFromDisk(string path) |
| 137 | { |
| 138 | // TODO: validate? |
| 139 | //_parser.set_validate(true); |
| 140 | |
| 141 | _parser.parse_file(path); |
| 142 | |
| 143 | _rootElement = _parser.get_document()->get_root_node(); |
| 144 | } |
| 145 | |
| 146 | |
| 147 | |
| 148 | /** |
| 149 | * Find all children with the specified name |
| 150 | * @param name name of children |
| 151 | * @return true if found, else false |
| 152 | */ |
| 153 | bool XMLStructure::findChild(string name) |
| 154 | { |
| 155 | _activeList = _rootElement->get_children(name); |
| 156 | _activeChildInList = _activeList.begin(); |
| 157 | |
| 158 | return !_activeList.empty(); |
| 159 | } |
| 160 | |
| 161 | |
| 162 | |
| 163 | /** |
| 164 | * Find next child in current search result list |
| 165 | * @return true if found, else false |
| 166 | */ |
| 167 | bool XMLStructure::findNextChild() |
| 168 | { |
| 169 | _activeChildInList++; |
| 170 | |
| 171 | bool endOfList = false; |
| 172 | |
| 173 | // last child? |
| 174 | if (_activeChildInList == _activeList.end()) |
| 175 | { |
| 176 | _activeChildInList--; |
| 177 | endOfList = true; |
| 178 | } |
| 179 | |
| 180 | return !endOfList; |
| 181 | } |
| 182 | |
| 183 | |
| 184 | |
| 185 | /** |
| 186 | * Get content of current child as a string |
| 187 | * @return the string |
| 188 | */ |
| 189 | string XMLStructure::getString() |
| 190 | { |
| 191 | // the child |
| 192 | xmlpp::Node *child = (*_activeChildInList)->get_children().front(); |
| 193 | |
| 194 | // its content |
| 195 | string content = dynamic_cast<xmlpp::ContentNode*>(child)->get_content(); |
| 196 | |
| 197 | return content; |
| 198 | } |
| 199 | |
| 200 | |
| 201 | |
| 202 | /** |
| 203 | * Get content of current child as a number |
| 204 | * @return the number |
| 205 | */ |
| 206 | double XMLStructure::getNumber() |
| 207 | { |
| 208 | double number = strtod(getString().c_str(), NULL); |
| 209 | |
| 210 | return number; |
| 211 | } |
| 212 | |
| 213 | |
| 214 | |
| 215 | /** |
| 216 | * Get attribute value of current child |
| 217 | * @param name name of attribute |
| 218 | * @return the value |
| 219 | */ |
| 220 | string XMLStructure::getAttribute(string name) |
| 221 | { |
| 222 | // the child |
| 223 | xmlpp::Element *child = dynamic_cast<xmlpp::Element*>(*_activeChildInList); |
| 224 | |
| 225 | // its attribute value |
| 226 | string attributeValue; |
| 227 | xmlpp::Attribute *attribute = child->get_attribute(name); |
| 228 | |
| 229 | if (attribute) |
| 230 | { |
| 231 | attributeValue = attribute->get_value(); |
| 232 | } |
| 233 | |
| 234 | return attributeValue; |
| 235 | } |
| 236 | |
| 237 | |
| 238 | |
| 239 | /** |
| 240 | * Convert double to string |
| 241 | * @param doubleValue the double value |
| 242 | * @return the corresponding string |
| 243 | */ |
| 244 | string XMLStructure::doubleToString(double doubleValue) |
| 245 | { |
| 246 | ostringstream doubleAsString; |
| 247 | doubleAsString << doubleValue; |
| 248 | |
| 249 | return doubleAsString.str(); |
| 250 | } |