1 | """Helper functions and classes. |
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2 | |
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3 | @author Michael Reimpell |
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4 | """ |
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5 | # Copyright (C) 2005 Michael Reimpell |
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6 | # |
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7 | # This library is free software; you can redistribute it and/or |
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8 | # modify it under the terms of the GNU Lesser General Public |
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9 | # License as published by the Free Software Foundation; either |
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10 | # version 2.1 of the License, or (at your option) any later version. |
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11 | # |
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12 | # This library is distributed in the hope that it will be useful, |
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13 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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15 | # Lesser General Public License for more details. |
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16 | # |
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17 | # You should have received a copy of the GNU Lesser General Public |
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18 | # License along with this library; if not, write to the Free Software |
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19 | # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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20 | |
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21 | # epydoc doc format |
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22 | __docformat__ = "javadoc en" |
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23 | |
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24 | import sys |
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25 | import os |
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26 | import string |
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27 | import pickle |
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28 | import Blender |
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29 | |
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30 | def indent(indent): |
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31 | """Indentation. |
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32 | |
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33 | @param indent Level of indentation. |
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34 | @return String. |
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35 | """ |
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36 | return " "*indent |
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37 | |
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38 | class Singleton: |
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39 | """Ensure that a class has at most one instance. |
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40 | |
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41 | @cvar instances Existing instances. |
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42 | """ |
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43 | instances = {} |
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44 | def __init__(self): |
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45 | """Constructor. |
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46 | """ |
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47 | assert self.__class__ not in Singleton.instances.keys(), \ |
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48 | "Class \"%s\" is a singleton." % self.__class__ |
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49 | Singleton.instances[self.__class__] = self |
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50 | return |
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51 | # @classmethod |
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52 | def getSingleton(singletonClass): |
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53 | """Returns singleton instance. |
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54 | """ |
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55 | instance = None |
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56 | if Singleton.instances.has_key(singletonClass): |
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57 | instance = Singleton.instances[singletonClass] |
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58 | else: |
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59 | instance = singletonClass() |
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60 | return instance |
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61 | getSingleton = classmethod(getSingleton) |
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62 | |
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63 | class Model: |
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64 | """Model interface. |
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65 | """ |
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66 | def __init__(self): |
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67 | self.viewList = [] |
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68 | return |
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69 | def addView(self, view): |
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70 | self.viewList.append(view) |
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71 | return |
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72 | def removeView(self, view): |
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73 | if view in self.viewList: |
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74 | self.viewList.remove(view) |
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75 | return |
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76 | # protected |
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77 | def _notify(self): |
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78 | """Notify views. |
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79 | """ |
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80 | for view in self.viewList: |
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81 | view.update() |
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82 | return |
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83 | |
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84 | class View: |
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85 | """View interface. |
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86 | """ |
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87 | def __init__(self, model): |
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88 | self.attachModel(model) |
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89 | return |
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90 | def __del__(self): |
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91 | self.detachModel() |
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92 | return |
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93 | def attachModel(self, model): |
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94 | self.model = model |
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95 | self.model.addView(self) |
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96 | return |
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97 | def detachModel(self): |
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98 | self.model.removeView(self) |
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99 | return |
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100 | def update(self): |
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101 | return |
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102 | |
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103 | class Log(Singleton, Model): |
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104 | """Logs messages and status. |
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105 | |
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106 | Logs messages as a list of strings and keeps track of the status. |
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107 | Possible status values are info, warning and error. |
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108 | |
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109 | @cvar INFO info status |
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110 | @cvar WARNING warning status |
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111 | @cvar ERROR error status |
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112 | """ |
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113 | INFO, WARNING, ERROR = range(3) |
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114 | def __init__(self): |
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115 | """Constructor. |
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116 | """ |
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117 | Singleton.__init__(self) |
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118 | Model.__init__(self) |
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119 | self.clear() |
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120 | return |
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121 | def clear(self): |
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122 | """Clears the log. |
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123 | """ |
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124 | self.messageList = [] |
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125 | self.status = Log.INFO |
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126 | return |
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127 | def logInfo(self, message): |
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128 | """Logs an info message. |
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129 | |
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130 | @param message message string |
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131 | """ |
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132 | self.messageList.append((Log.INFO, message)) |
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133 | self._notify() |
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134 | return |
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135 | def logWarning(self, message): |
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136 | """Logs a warning message. |
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137 | |
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138 | The status is set to <code>Log.WARNING</code> if it is not already <code>Log.ERROR</code>. |
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139 | |
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140 | @param message message string |
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141 | """ |
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142 | self.messageList.append((Log.WARNING, "Warning: "+message)) |
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143 | if not self.status == Log.ERROR: |
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144 | self.status = Log.WARNING |
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145 | self._notify() |
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146 | return |
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147 | def logError(self, message): |
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148 | """Logs an error message. |
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149 | |
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150 | The status is set to <code>Log.ERROR</code>. |
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151 | |
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152 | @param message message string |
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153 | """ |
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154 | self.messageList.append((Log.ERROR, "Error: "+message)) |
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155 | self.status = Log.ERROR |
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156 | self._notify() |
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157 | return |
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158 | def getStatus(self): |
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159 | """Gets the current status. |
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160 | |
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161 | The status can be |
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162 | <ul> |
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163 | <li><code>Log.INFO</code> |
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164 | <li><code>Log.WARNING</code> |
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165 | <li><code>Log.ERROR</code> |
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166 | </ul> |
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167 | |
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168 | @return status |
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169 | """ |
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170 | return self.status |
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171 | def getMessageList(self): |
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172 | """Returns the list of log messages. |
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173 | |
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174 | @return list of tuples (status, message) |
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175 | """ |
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176 | return self.messageList |
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177 | |
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178 | class PackageSettings(Singleton): |
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179 | """Manages package configuration. |
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180 | """ |
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181 | def __init__(self): |
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182 | Singleton.__init__(self) |
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183 | self.dict = {'objectDict':{}} |
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184 | self.textName = 'OgrePackage.cfg' |
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185 | return |
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186 | def save(self): |
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187 | """Save to Blender text 'OgrePackage.cfg'. |
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188 | """ |
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189 | # remove old configuration text |
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190 | if self.textName in [text.getName() for text in Blender.Text.Get()]: |
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191 | oldSettingsText = Blender.Text.Get(self.textName) |
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192 | oldSettingsText.setName('OgrePackage.old') |
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193 | Blender.Text.unlink(oldSettingsText) |
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194 | # write new configuration text |
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195 | settingsText = Blender.Text.New(self.textName) |
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196 | settingsText.write('OGRE Package settings file.\n\nThis file is automatically created. Please don\'t edit this file directly.\n\n') |
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197 | try: |
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198 | # pickle |
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199 | settingsText.write(pickle.dumps(self.dict)) |
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200 | except (pickle.PickleError): |
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201 | Log.getSingleton().logError('Couldn\'t pickle package settings!') |
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202 | return |
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203 | def clearNoneExistingObjects(self): |
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204 | """Maintainance method. |
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205 | |
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206 | As settigns are shared among the package, they get never deleted automatically. |
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207 | All settings that are loaded are saved again. Therefore it is advisable to clear |
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208 | the object settings for deleted objects from time to time. Applications that use |
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209 | the package are responsible to maintain their settings. |
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210 | """ |
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211 | existingNameList = [object.getName() for object in Blender.Object.Get()] |
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212 | for name in self.dict['objectDict'].keys(): |
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213 | if name not in existingNameList: |
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214 | del self.dict['objectDict'][name] |
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215 | return |
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216 | def setSetting(self, key, value): |
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217 | """Saves a setting to the package dict. |
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218 | |
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219 | Note: 'objectDict' is a reserved key. |
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220 | """ |
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221 | self.dict[key] = value |
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222 | return |
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223 | def getSetting(self, key): |
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224 | value = None |
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225 | if self.dict.has_key(key): |
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226 | value = self.dict[key] |
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227 | return value |
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228 | def setObjectSetting(self, objectName, key, value): |
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229 | if self.dict['objectDict'].has_key(objectName): |
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230 | self.dict['objectDict'][objectName][key] = value |
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231 | else: |
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232 | self.dict['objectDict'][objectName] = {key:value} |
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233 | return |
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234 | def getObjectSetting(self, objectName, key): |
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235 | value = None |
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236 | if self.dict['objectDict'].has_key(objectName): |
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237 | if self.dict['objectDict'][objectName].has_key(key): |
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238 | value = self.dict['objectDict'][objectName][key] |
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239 | return value |
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240 | def load(self): |
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241 | """Load from Blender text 'OgrePackage.cfg'. |
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242 | """ |
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243 | if self.textName in [text.getName() for text in Blender.Text.Get()]: |
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244 | settingsText = Blender.Text.Get(self.textName) |
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245 | # compose string from text and unpickle |
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246 | try: |
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247 | # unpickle |
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248 | self.dict = pickle.loads(string.join(settingsText.asLines()[4:],'\n')) |
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249 | except (pickle.PickleError): |
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250 | Log.getSingleton().logError('Couldn\'t unpickle package settings!') |
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251 | self.dict = {'objectDict':{}} |
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252 | return |
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253 | |
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254 | class OgreXMLConverter(Singleton): |
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255 | def __init__(self): |
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256 | Singleton.__init__(self) |
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257 | self.converter = None |
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258 | self.converterArgs = '' |
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259 | # get binary location from Blender's registry |
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260 | registryDict = Blender.Registry.GetKey('OgrePackage', True) |
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261 | if registryDict: |
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262 | if registryDict.has_key('OgreXMLConverter'): |
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263 | self.converter = registryDict['OgreXMLConverter'] |
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264 | # additional converter arguments |
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265 | converterArgs = PackageSettings.getSingleton().getSetting('OgreXMLConverterArgs') |
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266 | if converterArgs: |
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267 | self.converterArgs = converterArgs |
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268 | else: |
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269 | self.converterArgs = '' |
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270 | return |
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271 | def setAdditionalArguments(self, arguments): |
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272 | self.converterArgs = arguments |
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273 | PackageSettings.getSingleton().setSetting('OgreXMLConverterArgs', self.converterArgs) |
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274 | return |
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275 | def getAdditionalArguments(self): |
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276 | return self.converterArgs |
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277 | def getConverter(self): |
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278 | return self.converter |
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279 | def setConverter(self, converter): |
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280 | """Sets converter executable. |
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281 | |
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282 | Also saves converter location in Blender's registry. If <code>None</code> |
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283 | is passed, the converter is searched in $PATH. |
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284 | |
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285 | @param converter Location of OgreXMLConverter. |
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286 | """ |
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287 | self.converter = converter |
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288 | # update registry |
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289 | registryDict = Blender.Registry.GetKey('OgrePackage', True) |
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290 | if converter is None: |
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291 | # remove registry entry |
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292 | if registryDict and registryDict.has_key('OgreXMLConverter'): |
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293 | del registryDict['OgreXMLConverter'] |
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294 | Blender.Registry.SetKey('OgrePackage', registryDict, True) |
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295 | else: |
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296 | # set registry entry |
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297 | if registryDict is None: |
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298 | registryDict = {} |
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299 | registryDict['OgreXMLConverter'] = self.converter |
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300 | Blender.Registry.SetKey('OgrePackage', registryDict, True) |
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301 | return |
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302 | def findConverter(self): |
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303 | """Find converter in path. |
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304 | |
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305 | @return converter location or <code>None</code> if converter is not found. |
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306 | """ |
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307 | converter = None |
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308 | path = os.environ.get('PATH') |
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309 | if path: |
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310 | pathList = string.split(path, ':') |
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311 | found = False |
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312 | i = 0 |
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313 | while not found and (i < len(pathList)): |
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314 | if os.path.exists(os.path.join(pathList[i], 'OgreXMLConverter')): |
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315 | converter = os.path.join(pathList[i], 'OgreXMLConverter') |
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316 | found = True |
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317 | i += 1 |
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318 | return converter |
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319 | def convert(self, filename, arguments=''): |
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320 | """Converts given file with the OgreXMLConverter. |
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321 | |
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322 | @param filename The xml filename to pass to the converter. |
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323 | @param arguments Additional arguments to pass to the converter. |
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324 | """ |
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325 | converter = None |
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326 | if self.converter: |
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327 | converter = self.converter |
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328 | elif self.findConverter(): |
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329 | converter = 'OgreXMLConverter' |
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330 | if converter: |
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331 | dir = os.path.dirname(filename) |
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332 | # ensure proper encoding of filenames |
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333 | encodedDir = os.path.normpath(dir) |
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334 | encodedFilename = os.path.normpath(filename) |
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335 | encodedConverter = os.path.normpath(converter) |
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336 | # call the converter |
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337 | commandLine = '"' + encodedConverter + '" -log "' \ |
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338 | + os.path.join(encodedDir, 'OgreXMLConverter.log') \ |
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339 | + '" ' + self.converterArgs + ' ' + arguments \ |
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340 | + ' "' + encodedFilename + '"' |
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341 | if os.name == "nt": |
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342 | # workaround for popen windows bug |
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343 | commandLine = '"' + commandLine + '"' |
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344 | Log.getSingleton().logInfo("Running OgreXMLConverter: " + commandLine) |
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345 | xmlConverter = os.popen(commandLine, 'r') |
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346 | for line in xmlConverter: |
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347 | Log.getSingleton().logInfo("OgreXMLConverter: " + line) |
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348 | xmlConverter.close() |
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349 | return |
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350 | |
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351 | class ConvertibleXMLFile: |
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352 | """ |
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353 | """ |
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354 | def __init__(self, filename): |
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355 | self.filename = filename |
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356 | self.converterOptionDict = {} |
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357 | self.fileObject = open(self.filename, "w") |
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358 | return |
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359 | def write(self, str): |
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360 | self.fileObject.write(str) |
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361 | return |
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362 | def close(self): |
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363 | self.fileObject.close() |
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364 | return |
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365 | def addConverterOption(self, option, value=''): |
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366 | self.converterOptionDict[option] = value |
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367 | return |
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368 | def convert(self): |
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369 | arguments = '' |
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370 | for (key, value) in self.converterOptionDict.iteritems(): |
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371 | arguments += ' ' + key + ' ' + value |
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372 | OgreXMLConverter.getSingleton().convert(self.filename, arguments) |
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373 | return |
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374 | |
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375 | class PathName: |
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376 | """Splits a pathname independent of the underlying os. |
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377 | |
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378 | Blender saves pathnames in the os specific manner. Using os.path may result in problems |
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379 | when the export is done on a different os than the creation of the .blend file. |
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380 | """ |
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381 | def __init__(self, pathName): |
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382 | self.pathName = pathName |
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383 | return |
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384 | def dirname(self): |
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385 | return os.path.dirname(self.pathName) |
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386 | def basename(self): |
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387 | baseName = os.path.basename(self.pathName) |
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388 | # split from non-os directories |
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389 | # \\ |
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390 | baseName = baseName.split('\\').pop() |
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391 | # / |
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392 | baseName = baseName.split('/').pop() |
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393 | if (baseName != baseName.replace(' ','_')): |
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394 | # replace whitespace with underscore |
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395 | Log.getSingleton().logWarning("Whitespaces in filename \"%s\" replaced with underscores." % baseName) |
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396 | baseName = baseName.replace(' ','_') |
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397 | return baseName |
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398 | def path(self): |
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399 | return self.pathName |
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