| 1 | """macresource - Locate and open the resources needed for a script."""
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| 2 |
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| 3 | from Carbon import Res
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| 4 | import os
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| 5 | import sys
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| 6 | import MacOS
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| 7 | import macostools
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| 8 |
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| 9 | class ArgumentError(TypeError): pass
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| 10 | class ResourceFileNotFoundError(ImportError): pass
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| 11 |
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| 12 | def need(restype, resid, filename=None, modname=None):
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| 13 | """Open a resource file, if needed. restype and resid
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| 14 | are required parameters, and identify the resource for which to test. If it
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| 15 | is available we are done. If it is not available we look for a file filename
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| 16 | (default: modname with .rsrc appended) either in the same folder as
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| 17 | where modname was loaded from, or otherwise across sys.path.
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| 18 |
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| 19 | Returns the refno of the resource file opened (or None)"""
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| 20 |
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| 21 | if modname is None and filename is None:
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| 22 | raise ArgumentError, "Either filename or modname argument (or both) must be given"
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| 23 |
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| 24 | if type(resid) is type(1):
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| 25 | try:
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| 26 | h = Res.GetResource(restype, resid)
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| 27 | except Res.Error:
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| 28 | pass
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| 29 | else:
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| 30 | return None
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| 31 | else:
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| 32 | try:
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| 33 | h = Res.GetNamedResource(restype, resid)
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| 34 | except Res.Error:
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| 35 | pass
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| 36 | else:
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| 37 | return None
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| 38 |
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| 39 | # Construct a filename if we don't have one
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| 40 | if not filename:
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| 41 | if '.' in modname:
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| 42 | filename = modname.split('.')[-1] + '.rsrc'
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| 43 | else:
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| 44 | filename = modname + '.rsrc'
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| 45 |
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| 46 | # Now create a list of folders to search
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| 47 | searchdirs = []
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| 48 | if modname == '__main__':
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| 49 | # If we're main we look in the current directory
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| 50 | searchdirs = [os.curdir]
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| 51 | if sys.modules.has_key(modname):
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| 52 | mod = sys.modules[modname]
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| 53 | if hasattr(mod, '__file__'):
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| 54 | searchdirs = [os.path.dirname(mod.__file__)]
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| 55 | searchdirs.extend(sys.path)
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| 56 |
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| 57 | # And look for the file
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| 58 | for dir in searchdirs:
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| 59 | pathname = os.path.join(dir, filename)
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| 60 | if os.path.exists(pathname):
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| 61 | break
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| 62 | else:
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| 63 | raise ResourceFileNotFoundError, filename
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| 64 |
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| 65 | refno = open_pathname(pathname)
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| 66 |
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| 67 | # And check that the resource exists now
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| 68 | if type(resid) is type(1):
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| 69 | h = Res.GetResource(restype, resid)
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| 70 | else:
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| 71 | h = Res.GetNamedResource(restype, resid)
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| 72 | return refno
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| 73 |
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| 74 | def open_pathname(pathname, verbose=0):
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| 75 | """Open a resource file given by pathname, possibly decoding an
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| 76 | AppleSingle file"""
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| 77 | try:
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| 78 | refno = Res.FSpOpenResFile(pathname, 1)
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| 79 | except Res.Error, arg:
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| 80 | if arg[0] in (-37, -39):
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| 81 | # No resource fork. We may be on OSX, and this may be either
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| 82 | # a data-fork based resource file or a AppleSingle file
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| 83 | # from the CVS repository.
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| 84 | try:
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| 85 | refno = Res.FSOpenResourceFile(pathname, u'', 1)
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| 86 | except Res.Error, arg:
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| 87 | if arg[0] != -199:
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| 88 | # -199 is "bad resource map"
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| 89 | raise
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| 90 | else:
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| 91 | return refno
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| 92 | # Finally try decoding an AppleSingle file
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| 93 | pathname = _decode(pathname, verbose=verbose)
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| 94 | refno = Res.FSOpenResourceFile(pathname, u'', 1)
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| 95 | else:
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| 96 | raise
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| 97 | return refno
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| 98 |
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| 99 | def resource_pathname(pathname, verbose=0):
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