Mercurial > fife-parpg

annotate engine/python/fife/extensions/serializers/xml_loader_tools.py @ 684:4f36c890b1dd

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* Merged the 0.3.3dev branche changes to the trunk.
author helios2000@33b003aa-7bff-0310-803a-e67f0ece8222
date Mon, 06 Dec 2010 19:25:27 +0000
parents e3140f01749d
children
rev   line source
661
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1 # -*- coding: utf-8 -*-
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2 # ####################################################################
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3 # Copyright (C) 2005-2010 by the FIFE team
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4 # http://www.fifengine.de
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5 # This file is part of FIFE.
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6 #
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7 # FIFE 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
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19 # Free Software Foundation, Inc.,
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20 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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21 # ####################################################################
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22
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23 """ utilities for xml maploading process """
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24
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25 import sys, os
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26
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27 from fife import fife
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28 import math
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29
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30 def loadImportFile(loader, path, engine, debug=False):
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31 """ uses XMLObjectLoader to load import files from path
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32
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33 @type path: string
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34 @param path: path to import file
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35 @type debug: bool
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36 @param debug: flag to activate / deactivate print statements
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37 """
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38 loader.loadResource(fife.ResourceLocation(path))
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39 if debug: print 'imported object file ' + path
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40
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41 def loadImportDir(loader, path, engine, debug=False):
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42 """ helper function to call loadImportFile on a directory
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43
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44 @type path: string
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45 @param path: path to import directory
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46 @type debug: bool
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47 @param debug: flag to activate / deactivate print statements
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48 """
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49 for _file in filter(lambda f: f.split('.')[-1] == 'xml', engine.getVFS().listFiles(path)):
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50 loadImportFile(loader, '/'.join([path, _file]), engine, debug)
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51
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52 def loadImportDirRec(loader, path, engine, debug=False):
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53 """ helper function to call loadImportFile recursive on a directory
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54
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55 @type path: string
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56 @param path: path to import directory
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57 @type debug: bool
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58 @param debug: flag to activate / deactivate print statements
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59 """
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60 loadImportDir(loader, path, engine, debug)
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61
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62 for _dir in filter(lambda d: not d.startswith('.'), engine.getVFS().listDirectories(path)):
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63 loadImportDirRec(loader, '/'.join([path, _dir]), engine, debug)
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64
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65 def root_subfile(masterfile, subfile):
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66 """
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67 Returns new path for given subfile (path), which is rooted against masterfile
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68 E.g. if masterfile is ./../foo/bar.xml and subfile is ./../foo2/subfoo.xml,
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69 returned path is ../foo2/subfoo.xml
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70 NOTE: masterfile is expected to be *file*, not directory. subfile can be either
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71 """
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72 s = '/'
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73
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74 masterfile = norm_path(os.path.abspath(masterfile))
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75 subfile = norm_path(os.path.abspath(subfile))
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76
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77 master_fragments = masterfile.split(s)
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78 sub_fragments = subfile.split(s)
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79
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80 master_leftovers = []
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81 sub_leftovers = []
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82
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83 for i in xrange(len(master_fragments)):
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84 try:
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85 if master_fragments[i] == sub_fragments[i]:
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86 master_leftovers = master_fragments[i+1:]
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87 sub_leftovers = sub_fragments[i+1:]
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88 except IndexError:
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89 break
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90
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91 pathstr = ''
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92 for f in master_leftovers[:-1]:
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93 pathstr += '..' + s
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94 pathstr += s.join(sub_leftovers)
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95 return pathstr
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96
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97 def reverse_root_subfile(masterfile, subfile):
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98 """
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99 does inverse operation to root_subfile. E.g.
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100 E.g. if masterfile is ./../foo/bar.xml and subfile is ../foo2/subfoo.xml,
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101 returned path ./../foo2/subfoo.xml
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102 Usually this function is used to convert saved paths into engine relative paths
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103 NOTE: masterfile is expected to be *file*, not directory. subfile can be either
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104 """
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105 s = '/'
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106
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107 masterfile = norm_path(os.path.abspath(masterfile)).split(s)[:-1]
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108 subfile = norm_path(os.path.abspath( s.join(masterfile) + s + subfile ))
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109 masterfile = norm_path(os.getcwd()) + s + 'foo.bar' # cheat a little to satisfy root_subfile
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110 return root_subfile(masterfile, subfile)
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111
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112 def norm_path(path):
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113 """
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114 Makes the path use '/' delimited separators. FIFE always uses these delimiters, but some os-related
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115 routines will default to os.path.sep.
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116 """
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117 if os.path.sep == '/':
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118 return path
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119
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120 return '/'.join(path.split(os.path.sep))
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121
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122
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123 def frange(limit1, limit2 = None, increment = 1.):
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124 """ source:
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125 http://code.activestate.com/recipes/66472-frange-a-range-function-with-float-increments/
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126
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127 Range function that accepts floats (and integers).
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128
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129 Usage:
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130 frange(-2, 2, 0.1)
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131 frange(10)
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132 frange(10, increment = 0.5)
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133
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134 The returned value is an iterator. Use list(frange) for a list.
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135 """
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136
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137 if limit2 is None:
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138 limit2, limit1 = limit1, 0.
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139 else:
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140 limit1 = float(limit1)
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141
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142 count = int(math.ceil(limit2 - limit1)/increment)
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143 return (limit1 + n*increment for n in range(count))
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144