blender/release/scripts/modules/bpy/utils.py

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#
#  This program is free software; you can redistribute it and/or
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#  as published by the Free Software Foundation; either version 2
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#  along with this program; if not, write to the Free Software Foundation,
#  Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
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# ##### END GPL LICENSE BLOCK #####

# <pep8 compliant>

"""
This module contains utility functions spesific to blender but
not assosiated with blenders internal data.
"""

import bpy as _bpy
import os as _os
import sys as _sys

from _bpy import home_paths

def load_scripts(reload_scripts=False, refresh_scripts=False):
    import traceback
    import time

    t_main = time.time()

    loaded_modules = set()

    def test_import(module_name):
        if module_name in loaded_modules:
            return None
        if "." in module_name:
            print("Ignoring '%s', can't import files containing multiple periods." % module_name)
            return None

        try:
            t = time.time()
            ret = __import__(module_name)
            if _bpy.app.debug:
                print("time %s %.4f" % (module_name, time.time() - t))
            return ret
        except:
            traceback.print_exc()
            return None

    def test_reload(module):
        try:
            reload(module)
        except:
            traceback.print_exc()

    if reload_scripts:
        # reload modules that may not be directly included
        for type_class_name in dir(_bpy.types):
            type_class = getattr(_bpy.types, type_class_name)
            module_name = getattr(type_class, "__module__", "")

            if module_name and module_name != "bpy.types": # hard coded for C types
                loaded_modules.add(module_name)

        for module_name in loaded_modules:
            print("Reloading:", module_name)
            test_reload(_sys.modules[module_name])

    for base_path in script_paths():
        for path_subdir in ("", "ui", "op", "io", "cfg"):
            path = _os.path.join(base_path, path_subdir)
            if _os.path.isdir(path):

                # needed to load scripts after the users script path changes
                # we should also support a full reload but since this is now unstable it can be postponed.
                if refresh_scripts and path in _sys.path:
                    continue

                if path not in _sys.path: # reloading would add twice
                    _sys.path.insert(0, path)
                for f in sorted(_os.listdir(path)):
                    if f.endswith(".py"):
                        # python module
                        mod = test_import(f[0:-3])
                    elif ("." not in f) and (_os.path.isfile(_os.path.join(path, f, "__init__.py"))):
                        # python package
                        mod = test_import(f)
                    else:
                        mod = None

                    if reload_scripts and mod:
                        print("Reloading:", mod)
                        test_reload(mod)

    if _bpy.app.debug:
        print("Time %.4f" % (time.time() - t_main))


def expandpath(path):
    if path.startswith("//"):
        return _os.path.join(_os.path.dirname(_bpy.data.filename), path[2:])

    return path


_unclean_chars = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, \
    17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, \
    35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 46, 47, 58, 59, 60, 61, 62, 63, \
    64, 91, 92, 93, 94, 96, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, \
    133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, \
    147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, \
    161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, \
    175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, \
    189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, \
    203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, \
    217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, \
    231, 232, 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, \
    245, 246, 247, 248, 249, 250, 251, 252, 253, 254]

_unclean_chars = ''.join([chr(i) for i in _unclean_chars])


def clean_name(name, replace="_"):
    """
    Returns a name with characters replaced that may cause problems under various circumstances, such as writing to a file.
    All characters besides A-Z/a-z, 0-9 are replaced with "_"
    or the replace argumet if defined.
    """
    for ch in _unclean_chars:
        name = name.replace(ch, replace)
    return name


def display_name(name):
    """
    Creates a display string from name to be used menus and the user interface.
    Capitalize the first letter in all lowercase names, mixed case names are kept as is.
    Intended for use with filenames and module names.
    """
    name_base = _os.path.splitext(name)[0]

    # string replacements
    name_base = name_base.replace("_colon_", ":")

    name_base = name_base.replace("_", " ")

    if name_base.islower():
        return name_base.capitalize()
    else:
        return name_base


# base scripts
_scripts = _os.path.join(_os.path.dirname(__file__), _os.path.pardir, _os.path.pardir)
_scripts = (_os.path.normpath(_scripts), )


def script_paths(*args):
    """
    Returns a list of valid script paths from the home directory and user preferences.

    Accepts any number of string arguments which are joined to make a path.
    """
    scripts = list(_scripts)

    # add user scripts dir
    user_script_path = _bpy.context.user_preferences.filepaths.python_scripts_directory
    
    for path in home_paths("scripts") + (user_script_path, ):
        if path:
            path = _os.path.normpath(path)
            if path not in scripts and _os.path.isdir(path):
                scripts.append(path)

    if not args:
        print(scripts)
        return scripts

    subdir = _os.path.join(*args)
    script_paths = []
    for path in scripts:
        path_subdir = _os.path.join(path, subdir)
        if _os.path.isdir(path_subdir):
            script_paths.append(path_subdir)
    print(script_paths)
    return script_paths


_presets = _os.path.join(_scripts[0], "presets") # FIXME - multiple paths


def preset_paths(subdir):
    '''
    Returns a list of paths for a spesific preset.
    '''

    return (_os.path.join(_presets, subdir), )