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1 | // Copyright (C) 2006 Erik Dahlberg |
2 | // |
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3 | // This file is part of LSystem3D. |
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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 | |
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22 | #include <cstdlib> |
23 | |
24 | #include <sstream> |
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25 | #include <string> |
26 | |
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27 | #include <libxml++/attribute.h> |
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28 | #include <libxml++/document.h> |
29 | #include <libxml++/nodes/element.h> |
30 | #include <libxml++/nodes/node.h> |
31 | #include <libxml++/parsers/domparser.h> |
32 | |
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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; |
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47 | _activeChildInList = (xmlpp::Node::NodeList::iterator)NULL; |
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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 | { |
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104 | addString(doubleToString(value)); |
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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 | { |
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208 | double number = strtod(getString().c_str(), NULL); |
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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 |
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226 | string attributeValue; |
227 | xmlpp::Attribute *attribute = child->get_attribute(name); |
228 | |
229 | if (attribute) |
230 | { |
231 | attributeValue = attribute->get_value(); |
232 | } |
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233 | |
234 | return attributeValue; |
235 | } |
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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 | } |