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

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# ##### BEGIN GPL LICENSE BLOCK #####
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
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# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
# ##### END GPL LICENSE BLOCK #####
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# <pep8 compliant>
"""
This module contains utility functions specific to blender but
not assosiated with blenders internal data.
"""
import bpy as _bpy
import os as _os
import sys as _sys
from _bpy import blend_paths
from _bpy import script_paths as _bpy_script_paths
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def _test_import(module_name, loaded_modules):
import traceback
import time
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
t = time.time()
try:
mod = __import__(module_name)
except:
traceback.print_exc()
return None
if _bpy.app.debug:
print("time %s %.4f" % (module_name, time.time() - t))
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loaded_modules.add(mod.__name__) # should match mod.__name__ too
return mod
def modules_from_path(path, loaded_modules):
"""
Load all modules in a path and return them as a list.
:arg path: this path is scanned for scripts and packages.
:type path: string
:arg loaded_modules: already loaded module names, files matching these names will be ignored.
:type loaded_modules: set
:return: all loaded modules.
:rtype: list
"""
import traceback
import time
modules = []
for mod_name, mod_path in _bpy.path.module_names(path):
mod = _test_import(mod_name, loaded_modules)
if mod:
modules.append(mod)
return modules
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_global_loaded_modules = [] # store loaded module names for reloading.
import bpy_types as _bpy_types # keep for comparisons, never ever reload this.
def load_scripts(reload_scripts=False, refresh_scripts=False):
"""
Load scripts and run each modules register function.
:arg reload_scripts: Causes all scripts to have their unregister method called before loading.
:type reload_scripts: bool
:arg refresh_scripts: only load scripts which are not already loaded as modules.
:type refresh_scripts: bool
"""
import traceback
import time
# must be set back to True on exits
_bpy_types._register_immediate = False
t_main = time.time()
loaded_modules = set()
if refresh_scripts:
original_modules = _sys.modules.values()
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if reload_scripts:
_bpy_types.TypeMap.clear()
_bpy_types.PropertiesMap.clear()
def register_module_call(mod):
_bpy_types._register_module(mod.__name__)
register = getattr(mod, "register", None)
if register:
try:
register()
except:
traceback.print_exc()
else:
print("\nWarning! '%s' has no register function, this is now a requirement for registerable scripts." % mod.__file__)
def unregister_module_call(mod):
_bpy_types._unregister_module(mod.__name__)
unregister = getattr(mod, "unregister", None)
if unregister:
try:
unregister()
except:
traceback.print_exc()
def sys_path_ensure(path):
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if path not in _sys.path: # reloading would add twice
_sys.path.insert(0, path)
def test_reload(mod):
# reloading this causes internal errors
# because the classes from this module are stored internally
# possibly to refresh internal references too but for now, best not to.
if mod == _bpy_types:
return mod
try:
return reload(mod)
except:
traceback.print_exc()
def test_register(mod):
if refresh_scripts and mod in original_modules:
return
if reload_scripts and mod:
print("Reloading:", mod)
mod = test_reload(mod)
if mod:
register_module_call(mod)
_global_loaded_modules.append(mod.__name__)
if reload_scripts:
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# module names -> modules
_global_loaded_modules[:] = [_sys.modules[mod_name] for mod_name in _global_loaded_modules]
# loop over and unload all scripts
_global_loaded_modules.reverse()
for mod in _global_loaded_modules:
unregister_module_call(mod)
for mod in _global_loaded_modules:
test_reload(mod)
_global_loaded_modules[:] = []
user_path = user_script_path()
for base_path in script_paths():
for path_subdir in ("", "ui", "op", "io", "cfg", "keyingsets", "modules"):
path = _os.path.join(base_path, path_subdir)
if _os.path.isdir(path):
sys_path_ensure(path)
# only add this to sys.modules, dont run
if path_subdir == "modules":
continue
if user_path != base_path and path_subdir == "":
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continue # avoid loading 2.4x scripts
for mod in modules_from_path(path, loaded_modules):
test_register(mod)
# load addons
used_ext = {ext.module for ext in _bpy.context.user_preferences.addons}
paths = script_paths("addons") + script_paths("addons_contrib")
for path in paths:
sys_path_ensure(path)
for module_name in sorted(used_ext):
mod = _test_import(module_name, loaded_modules)
test_register(mod)
if reload_scripts:
import gc
print("gc.collect() -> %d" % gc.collect())
if _bpy.app.debug:
print("Python Script Load Time %.4f" % (time.time() - t_main))
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_bpy_types._register_immediate = True
# base scripts
_scripts = _os.path.join(_os.path.dirname(__file__), _os.path.pardir, _os.path.pardir)
_scripts = (_os.path.normpath(_scripts), )
def user_script_path():
path = _bpy.context.user_preferences.filepaths.script_directory
if path:
path = _os.path.normpath(path)
return path
else:
return None
def script_paths(subdir=None, user=True):
"""
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)
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# add user scripts dir
if user:
user_script_path = _bpy.context.user_preferences.filepaths.script_directory
else:
user_script_path = None
for path in _bpy_script_paths() + (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 subdir:
return scripts
script_paths = []
for path in scripts:
path_subdir = _os.path.join(path, subdir)
if _os.path.isdir(path_subdir):
script_paths.append(path_subdir)
return script_paths
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_presets = _os.path.join(_scripts[0], "presets") # FIXME - multiple paths
def preset_paths(subdir):
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'''
Returns a list of paths for a specific preset.
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'''
return (_os.path.join(_presets, subdir), )
def smpte_from_seconds(time, fps=None):
'''
Returns an SMPTE formatted string from the time in seconds: "HH:MM:SS:FF".
If the *fps* is not given the current scene is used.
'''
import math
if fps is None:
fps = _bpy.context.scene.render.fps
hours = minutes = seconds = frames = 0
if time < 0:
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time = - time
neg = "-"
else:
neg = ""
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if time >= 3600.0: # hours
hours = int(time / 3600.0)
time = time % 3600.0
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if time >= 60.0: # mins
minutes = int(time / 60.0)
time = time % 60.0
seconds = int(time)
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frames = int(round(math.floor(((time - seconds) * fps))))
return "%s%02d:%02d:%02d:%02d" % (neg, hours, minutes, seconds, frames)
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def smpte_from_frame(frame, fps=None, fps_base=None):
'''
Returns an SMPTE formatted string from the frame: "HH:MM:SS:FF".
If *fps* and *fps_base* are not given the current scene is used.
'''
if fps is None:
fps = _bpy.context.scene.render.fps
if fps_base is None:
fps_base = _bpy.context.scene.render.fps_base
return smpte_from_seconds((frame * fps_base) / fps, fps)