Files
create/src/Mod/Draft/draftutils/utils.py
vocx-fc 692fa7e702 Draft: new module for utility functions
Many auxiliary tools used by `Draft.py` can be defined
in another module. Many functions are moved to this module
so that `Draft.py` isn't as big and hard to maintain.

The following is a list of functions and attributes that were moved:
`stringencodecoin`, `arrowtypes`, `typecheck`,
`getParamType`, `getParam`, `setParam`, `precision`,
`tolerance`, `epsilon`, `getRealName`, `getType`,
`getObjectsOfType`, `isClone`, `getGroupNames`,
`ungroup`, `shapify`, `getGroupContents`,
`printShape`, `compareObjects`, `loadSvgPatterns`,
`svgpatterns`, `getMovableChildren`, `getWindows`,
`utf8_decode`.

Moreover, many of these functions were renamed
to comply better with PEP8 guidelines, particularly
the use of `snake_case`. For example, `getGroupNames`
is now `get_group_names`; `getMovableChildren`
is now `get_movable_children`.

Aliases are provided for the old names so that
other functions and classes that depend on these
won't break. The new names should be the official
programming interface, while the old names
should be deprecated at some point in the future.
2020-01-08 15:16:55 +01:00

1049 lines
32 KiB
Python

# -*- coding: utf-8 -*-
"""This module provides utility functions for the Draft Workbench.
This module should contain auxiliary functions which don't require
the graphical user interface (GUI).
"""
## @package utils
# \ingroup DRAFT
# \brief This module provides utility functions for the Draft Workbench
# ***************************************************************************
# * (c) 2009, 2010 *
# * Yorik van Havre <yorik@uncreated.net>, Ken Cline <cline@frii.com> *
# * (c) 2019 Eliud Cabrera Castillo <e.cabrera-castillo@tum.de> *
# * *
# * This file is part of the FreeCAD CAx development system. *
# * *
# * This program is free software; you can redistribute it and/or modify *
# * it under the terms of the GNU Lesser General Public License (LGPL) *
# * as published by the Free Software Foundation; either version 2 of *
# * the License, or (at your option) any later version. *
# * for detail see the LICENCE text file. *
# * *
# * FreeCAD 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 Library General Public License for more details. *
# * *
# * You should have received a copy of the GNU Library General Public *
# * License along with FreeCAD; if not, write to the Free Software *
# * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 *
# * USA *
# * *
# ***************************************************************************
import os
import FreeCAD
from PySide import QtCore
import Draft_rc
App = FreeCAD
# The module is used to prevent complaints from code checkers (flake8)
True if Draft_rc else False
if App.GuiUp:
# The right translate function needs to be imported here
# from DraftGui import translate
# At the moment it is the same function as without GUI
def translate(context, text):
return text
else:
def translate(context, text):
return text
def _tr(text):
"""Function to translate with the context set."""
return translate("Draft", text)
def _msg(text, end="\n"):
App.Console.PrintMessage(text + end)
def _wrn(text, end="\n"):
App.Console.PrintWarning(text + end)
def _log(text, end="\n"):
App.Console.PrintLog(text + end)
ARROW_TYPES = ["Dot", "Circle", "Arrow", "Tick", "Tick-2"]
arrowtypes = ARROW_TYPES
def string_encode_coin(ustr):
"""Encode a unicode object to be used as a string in coin
Parameters
----------
ustr : str
A string to be encoded
Returns
-------
str
Encoded string. If the coin version is >= 4
it will encode the string to `'utf-8'`, otherwise
it will encode it to `'latin-1'`.
"""
try:
from pivy import coin
coin4 = coin.COIN_MAJOR_VERSION >= 4
except (ImportError, AttributeError):
coin4 = False
if coin4:
return ustr.encode('utf-8')
else:
return ustr.encode('latin1')
stringencodecoin = string_encode_coin
def type_check(args_and_types, name="?"):
"""Check that the arguments are instances of certain types.
Parameters
----------
args_and_types : list
A list of tuples. The first element of a tuple is tested as being
an instance of the second element.
::
args_and_types = [(a, Type), (b, Type2), ...]
Then
::
isinstance(a, Type)
isinstance(b, Type2)
A `Type` can also be a tuple of many types, in which case
the check is done for any of them.
::
args_and_types = [(a, (Type3, int, float)), ...]
isinstance(a, (Type3, int, float))
name : str, optional
Defaults to `'?'`. The name of the check.
Raises
-------
TypeError
If the first element in the tuple is not an instance of the second
element, it raises `Draft.name`.
"""
for v, t in args_and_types:
if not isinstance(v, t):
w = "typecheck[" + str(name) + "]: "
w += str(v) + " is not " + str(t) + "\n"
FreeCAD.Console.PrintWarning(w)
raise TypeError("Draft." + str(name))
typecheck = type_check
def get_param_type(param):
"""Return the type of the parameter entered.
Parameters
----------
param : str
A string that indicates a parameter in the parameter database.
Returns
-------
str or None
The returned string could be `'int'`, `'string'`, `'float'`,
`'bool'`, `'unsigned'`, depending on the parameter.
It returns `None` for unhandled situations.
"""
if param in ("dimsymbol", "dimPrecision", "dimorientation",
"precision", "defaultWP", "snapRange", "gridEvery",
"linewidth", "UiMode", "modconstrain", "modsnap",
"maxSnapEdges", "modalt", "HatchPatternResolution",
"snapStyle", "dimstyle", "gridSize"):
return "int"
elif param in ("constructiongroupname", "textfont",
"patternFile", "template", "snapModes",
"FontFile", "ClonePrefix",
"labeltype") or "inCommandShortcut" in param:
return "string"
elif param in ("textheight", "tolerance", "gridSpacing",
"arrowsize", "extlines", "dimspacing",
"dimovershoot", "extovershoot"):
return "float"
elif param in ("selectBaseObjects", "alwaysSnap", "grid",
"fillmode", "saveonexit", "maxSnap",
"SvgLinesBlack", "dxfStdSize", "showSnapBar",
"hideSnapBar", "alwaysShowGrid", "renderPolylineWidth",
"showPlaneTracker", "UsePartPrimitives",
"DiscretizeEllipses", "showUnit"):
return "bool"
elif param in ("color", "constructioncolor",
"snapcolor", "gridColor"):
return "unsigned"
else:
return None
getParamType = get_param_type
def get_param(param, default=None):
"""Return a paramater value from the current parameter database.
The parameter database is located in the tree
::
'User parameter:BaseApp/Preferences/Mod/Draft'
In the case that `param` is `'linewidth'` or `'color'` it will get
the values from the View parameters
::
'User parameter:BaseApp/Preferences/View/DefaultShapeLineWidth'
'User parameter:BaseApp/Preferences/View/DefaultShapeLineColor'
Parameters
----------
param : str
A string that indicates a parameter in the parameter database.
default : optional
It indicates the default value of the given parameter.
It defaults to `None`, in which case it will use a specific
value depending on the type of parameter determined
with `get_param_type`.
Returns
-------
int, or str, or float, or bool
Depending on `param` and its type, by returning `ParameterGrp.GetInt`,
`ParameterGrp.GetString`, `ParameterGrp.GetFloat`,
`ParameterGrp.GetBool`, or `ParameterGrp.GetUnsinged`.
"""
draft_params = "User parameter:BaseApp/Preferences/Mod/Draft"
view_params = "User parameter:BaseApp/Preferences/View"
p = FreeCAD.ParamGet(draft_params)
v = FreeCAD.ParamGet(view_params)
t = getParamType(param)
# print("getting param ",param, " of type ",t, " default: ",str(default))
if t == "int":
if default is None:
default = 0
if param == "linewidth":
return v.GetInt("DefaultShapeLineWidth", default)
return p.GetInt(param, default)
elif t == "string":
if default is None:
default = ""
return p.GetString(param, default)
elif t == "float":
if default is None:
default = 0
return p.GetFloat(param, default)
elif t == "bool":
if default is None:
default = False
return p.GetBool(param, default)
elif t == "unsigned":
if default is None:
default = 0
if param == "color":
return v.GetUnsigned("DefaultShapeLineColor", default)
return p.GetUnsigned(param, default)
else:
return None
getParam = get_param
def set_param(param, value):
"""Set a Draft parameter with the given value
The parameter database is located in the tree
::
'User parameter:BaseApp/Preferences/Mod/Draft'
In the case that `param` is `'linewidth'` or `'color'` it will set
the View parameters
::
'User parameter:BaseApp/Preferences/View/DefaultShapeLineWidth'
'User parameter:BaseApp/Preferences/View/DefaultShapeLineColor'
Parameters
----------
param : str
A string that indicates a parameter in the parameter database.
value : int, or str, or float, or bool
The appropriate value of the parameter.
Depending on `param` and its type, determined with `get_param_type`,
it sets the appropriate value by calling `ParameterGrp.SetInt`,
`ParameterGrp.SetString`, `ParameterGrp.SetFloat`,
`ParameterGrp.SetBool`, or `ParameterGrp.SetUnsinged`.
"""
draft_params = "User parameter:BaseApp/Preferences/Mod/Draft"
view_params = "User parameter:BaseApp/Preferences/View"
p = FreeCAD.ParamGet(draft_params)
v = FreeCAD.ParamGet(view_params)
t = getParamType(param)
if t == "int":
if param == "linewidth":
v.SetInt("DefaultShapeLineWidth", value)
else:
p.SetInt(param, value)
elif t == "string":
p.SetString(param, value)
elif t == "float":
p.SetFloat(param, value)
elif t == "bool":
p.SetBool(param, value)
elif t == "unsigned":
if param == "color":
v.SetUnsigned("DefaultShapeLineColor", value)
else:
p.SetUnsigned(param, value)
setParam = set_param
def precision():
"""Return the precision value from the paramater database.
It is the number of decimal places that a float will have.
Example
::
precision=6, 0.123456
precision=5, 0.12345
precision=4, 0.1234
Due to floating point operations there may be rounding errors.
Therefore, this precision number is used to round up values
so that all operations are consistent.
By default the precision is 6 decimal places.
Returns
-------
int
get_param("precision", 6)
"""
return getParam("precision", 6)
def tolerance():
"""Return the tolerance value from the parameter database.
This specifies a tolerance around a quantity.
::
value + tolerance
value - tolerance
By default the tolerance is 0.05.
Returns
-------
float
get_param("tolerance", 0.05)
"""
return getParam("tolerance", 0.05)
def epsilon():
"""Return a small number based on the tolerance for use in comparisons.
The epsilon value is used in floating point comparisons. Use with caution.
::
denom = 10**tolerance
num = 1
epsilon = num/denom
Returns
-------
float
1/(10**tolerance)
"""
return 1.0/(10.0**tolerance())
def get_real_name(name):
"""Strip the trailing numbers from a string to get only the letters.
Paramaters
----------
name : str
A string that may have a number at the end, `Line001`.
Returns
-------
str
A string without the numbers at the end, `Line`.
The returned string cannot be empty; it will have
at least one letter.
"""
for i in range(1, len(name)):
if name[-i] not in '1234567890':
return name[:len(name) - (i-1)]
return name
getRealName = get_real_name
def get_type(obj):
"""Return a string indicating the type of the given object.
Paramaters
----------
obj : App::DocumentObject
Any type of scripted object created with Draft,
or any other workbench.
Returns
-------
str
If `obj` has a `Proxy`, it will return the value of `obj.Proxy.Type`.
* If `obj` is a `Part.Shape`, returns `'Shape'`
* If `'Sketcher::SketchObject'`, returns `'Sketch'`
* If `'Part::Line'`, returns `'Part::Line'`
* If `'Part::Offset2D'`, returns `'Offset2D'`
* If `'Part::Feature'`, returns `'Part'`
* If `'App::Annotation'`, returns `'Annotation'`
* If `'Mesh::Feature'`, returns `'Mesh'`
* If `'Points::Feature'`, returns `'Points'`
* If `'App::DocumentObjectGroup'`, returns `'Group'`
* If `'App::Part'`, returns `'App::Part'`
In other cases, it will return `'Unknown'`,
or `None` if `obj` is `None`.
"""
import Part
if not obj:
return None
if isinstance(obj, Part.Shape):
return "Shape"
if "Proxy" in obj.PropertiesList:
if hasattr(obj.Proxy, "Type"):
return obj.Proxy.Type
if obj.isDerivedFrom("Sketcher::SketchObject"):
return "Sketch"
if (obj.TypeId == "Part::Line"):
return "Part::Line"
if (obj.TypeId == "Part::Offset2D"):
return "Offset2D"
if obj.isDerivedFrom("Part::Feature"):
return "Part"
if (obj.TypeId == "App::Annotation"):
return "Annotation"
if obj.isDerivedFrom("Mesh::Feature"):
return "Mesh"
if obj.isDerivedFrom("Points::Feature"):
return "Points"
if (obj.TypeId == "App::DocumentObjectGroup"):
return "Group"
if (obj.TypeId == "App::Part"):
return "App::Part"
return "Unknown"
getType = get_type
def get_objects_of_type(objects, typ):
"""Return only the objects that match the type in the list of objects.
Parameters
----------
objects : list of App::DocumentObject
A list of objects which will be tested.
typ : str
A string that indicates a type. This should be one of the types
that can be returned by `get_type`.
Returns
-------
list of objects
Only the objects that match `typ` will be added to the output list.
"""
objs = []
for o in objects:
if getType(o) == typ:
objs.append(o)
return objs
getObjectsOfType = get_objects_of_type
def is_clone(obj, objtype, recursive=False):
"""Return True if the given object is a clone of a certain type.
A clone is of type `'Clone'`, and has a reference
to the original object inside its `Objects` attribute,
which is an `'App::PropertyLinkListGlobal'`.
The `Objects` attribute can point to another `'Clone'` object.
If `recursive` is `True`, the function will be called recursively
to further test this clone, until the type of the original object
can be compared to `objtype`.
Parameters
----------
obj : App::DocumentObject
The clone object that will be tested for a certain type.
objtype : str or list of str
A type string such as one obtained from `get_type`.
Or a list of such types.
recursive : bool, optional
It defaults to `False`.
If it is `True`, this same function will be called recursively
with `obj.Object[0]` as input.
This option only works if `obj.Object[0]` is of type `'Clone'`,
that is, if `obj` is a clone of a clone.
Returns
-------
bool
Returns `True` if `obj` is of type `'Clone'`,
and `obj.Object[0]` is of type `objtype`.
If `objtype` is a list, then `obj.Objects[0]`
will be tested against each of the elements in the list,
and it will return `True` if at least one element matches the type.
If `obj` isn't of type `'Clone'` but has the `CloneOf` attribute,
it will also return `True`.
It returns `False` otherwise, for example,
if `obj` is not even a clone.
"""
if isinstance(objtype, list):
return any([isClone(obj, t, recursive) for t in objtype])
if getType(obj) == "Clone":
if len(obj.Objects) == 1:
if getType(obj.Objects[0]) == objtype:
return True
elif recursive and (getType(obj.Objects[0]) == "Clone"):
return isClone(obj.Objects[0], objtype, recursive)
elif hasattr(obj, "CloneOf"):
if obj.CloneOf:
return True
return False
isClone = is_clone
def get_group_names():
"""Return a list of names of existing groups in the document.
Returns
-------
list of str
A list of names of objects that are "groups".
These are objects derived from `'App::DocumentObjectGroup'`
or which are of types `'Floor'`, `'Building'`, or `'Site'`
(from the Arch Workbench).
Otherwise, return an empty list.
"""
glist = []
doc = FreeCAD.ActiveDocument
for obj in doc.Objects:
if (obj.isDerivedFrom("App::DocumentObjectGroup")
or getType(obj) in ("Floor", "Building", "Site")):
glist.append(obj.Name)
return glist
getGroupNames = get_group_names
def ungroup(obj):
"""Remove the object from any group to which it belongs.
A "group" is any object returned by `get_group_names`.
Parameters
----------
obj : App::DocumentObject
Any type of scripted object.
"""
for name in getGroupNames():
group = FreeCAD.ActiveDocument.getObject(name)
if obj in group.Group:
# The list of objects cannot be modified directly,
# so a new list is created, this new list is modified,
# and then it is assigned over the older list.
objects = group.Group
objects.remove(obj)
group.Group = objects
def shapify(obj):
"""Transform a parametric object into a static, non-parametric shape.
Parameters
----------
obj : App::DocumentObject
Any type of scripted object.
This object will be removed, and a non-parametric object
with the same topological shape (`Part::TopoShape`)
will be created.
Returns
-------
Part::Feature
The new object that takes `obj.Shape` as its own.
Depending on the contents of the Shape, the resulting object
will be named `'Face'`, `'Solid'`, `'Compound'`,
`'Shell'`, `'Wire'`, `'Line'`, `'Circle'`,
or the name returned by `get_real_name(obj.Name)`.
If there is a problem with `obj.Shape`, it will return `None`,
and the original object will not be modified.
"""
try:
shape = obj.Shape
except Exception:
return None
if len(shape.Faces) == 1:
name = "Face"
elif len(shape.Solids) == 1:
name = "Solid"
elif len(shape.Solids) > 1:
name = "Compound"
elif len(shape.Faces) > 1:
name = "Shell"
elif len(shape.Wires) == 1:
name = "Wire"
elif len(shape.Edges) == 1:
import DraftGeomUtils
if DraftGeomUtils.geomType(shape.Edges[0]) == "Line":
name = "Line"
else:
name = "Circle"
else:
name = getRealName(obj.Name)
FreeCAD.ActiveDocument.removeObject(obj.Name)
newobj = FreeCAD.ActiveDocument.addObject("Part::Feature", name)
newobj.Shape = shape
return newobj
def get_windows(obj):
"""Return the windows and rebars inside a host.
Parameters
----------
obj : App::DocumentObject
A scripted object of type `'Wall'` or `'Structure'`
(Arch Workbench).
This will be searched for objects of type `'Window'` and `'Rebar'`,
and clones of them, and the found elements will be added
to the output list.
The function will search recursively all elements under `obj.OutList`,
in case the windows and rebars are nested under other walls
and structures.
Returns
-------
list
A list of all found windows and rebars in `obj`.
If `obj` is itself a `'Window'` or a `'Rebar'`, or a clone of them,
it will return the same `obj` element.
"""
out = []
if getType(obj) in ("Wall", "Structure"):
for o in obj.OutList:
out.extend(get_windows(o))
for i in obj.InList:
if getType(i) in ("Window") or isClone(obj, "Window"):
if hasattr(i, "Hosts"):
if obj in i.Hosts:
out.append(i)
elif getType(i) in ("Rebar") or isClone(obj, "Rebar"):
if hasattr(i, "Host"):
if obj == i.Host:
out.append(i)
elif (getType(obj) in ("Window", "Rebar")
or isClone(obj, ["Window", "Rebar"])):
out.append(obj)
return out
getWindows = get_windows
def get_group_contents(objectslist,
walls=False, addgroups=False,
spaces=False, noarchchild=False):
"""Return a list of objects from expanding the input groups.
The function accepts any type of object, although it is most useful
with "groups", as it is meant to unpack the objects inside these groups.
Parameters
----------
objectslist : list
If any object in the list is a group, its contents (`obj.Group`)
are extracted and added to the output list.
The "groups" are objects derived from `'App::DocumentObjectGroup'`,
but they can also be `'App::Part'`, or `'Building'`, `'BuildingPart'`,
`'Space'`, and `'Site'` from the Arch Workbench.
Single items that aren't groups are added to the output list
as is.
walls : bool, optional
It defaults to `False`.
If it is `True`, Wall and Structure objects (Arch Workbench)
are treated as groups; they are scanned for Window, Door,
and Rebar objects, and these are added to the output list.
addgroups : bool, optional
It defaults to `False`.
If it is `True`, the group itself is kept as part of the output list.
spaces : bool, optional
It defaults to `False`.
If it is `True`, Arch Spaces are treated as groups,
and are added to the output list.
noarchchild : bool, optional
It defaults to `False`.
If it is `True`, the objects inside Building and BuildingParts
(Arch Workbench) aren't added to the output list.
Returns
-------
list
The list of objects from each group present in `objectslist`,
plus any other individual object given in `objectslist`.
"""
newlist = []
if not isinstance(objectslist, list):
objectslist = [objectslist]
for obj in objectslist:
if obj:
if (obj.isDerivedFrom("App::DocumentObjectGroup")
or (getType(obj) in ("App::Part",
"Building", "BuildingPart",
"Space", "Site")
and hasattr(obj, "Group"))):
if getType(obj) == "Site":
if obj.Shape:
newlist.append(obj)
if obj.isDerivedFrom("Drawing::FeaturePage"):
# skip if the group is a page
newlist.append(obj)
else:
if addgroups or (spaces and getType(obj) == "Space"):
newlist.append(obj)
if (noarchchild
and getType(obj) in ("Building", "BuildingPart")):
pass
else:
newlist.extend(getGroupContents(obj.Group,
walls, addgroups))
else:
# print("adding ", obj.Name)
newlist.append(obj)
if walls:
newlist.extend(getWindows(obj))
# Clean possible duplicates
cleanlist = []
for obj in newlist:
if obj not in cleanlist:
cleanlist.append(obj)
return cleanlist
getGroupContents = get_group_contents
def print_shape(shape):
"""Print detailed information of a topological shape.
Parameters
----------
shape : Part::TopoShape
Any topological shape in an object, usually obtained from `obj.Shape`.
"""
_msg(_tr("Solids:") + " {}".format(len(shape.Solids)))
_msg(_tr("Faces:") + " {}".format(len(shape.Faces)))
_msg(_tr("Wires:") + " {}".format(len(shape.Wires)))
_msg(_tr("Edges:") + " {}".format(len(shape.Edges)))
_msg(_tr("Vertices:") + " {}".format(len(shape.Vertexes)))
if shape.Faces:
for f in range(len(shape.Faces)):
_msg(_tr("Face") + " {}:".format(f))
for v in shape.Faces[f].Vertexes:
_msg(" {}".format(v.Point))
elif shape.Wires:
for w in range(len(shape.Wires)):
_msg(_tr("Wire") + " {}:".format(w))
for v in shape.Wires[w].Vertexes:
_msg(" {}".format(v.Point))
else:
for v in shape.Vertexes:
_msg(" {}".format(v.Point))
printShape = print_shape
def compare_objects(obj1, obj2):
"""Print the differences between 2 objects.
The two objects are compared through their `TypeId` attribute,
or by using the `get_type` function.
If they are the same type their properties are compared
looking for differences.
Neither `Shape` nor `Label` attributes are compared.
Parameters
----------
obj1 : App::DocumentObject
Any type of scripted object.
obj2 : App::DocumentObject
Any type of scripted object.
"""
if obj1.TypeId != obj2.TypeId:
_msg("'{0}' ({1}), '{2}' ({3}): ".format(obj1.Name, obj1.TypeId,
obj2.Name, obj2.TypeId)
+ _tr("different types") + " (TypeId)")
elif getType(obj1) != getType(obj2):
_msg("'{0}' ({1}), '{2}' ({3}): ".format(obj1.Name, get_type(obj1),
obj2.Name, get_type(obj2))
+ _tr("different types") + " (Proxy.Type)")
else:
for p in obj1.PropertiesList:
if p in obj2.PropertiesList:
if p in ("Shape", "Label"):
pass
elif p == "Placement":
delta = obj1.Placement.Base.sub(obj2.Placement.Base)
text = _tr("Objects have different placements. "
"Distance between the two base points: ")
_msg(text + str(delta.Length))
else:
if getattr(obj1, p) != getattr(obj2, p):
_msg("'{}' ".format(p) + _tr("has a different value"))
else:
_msg("{} ".format(p)
+ _tr("doesn't exist in one of the objects"))
compareObjects = compare_objects
def load_svg_patterns():
"""Load the default Draft SVG patterns and user defined patterns.
The SVG patterns are added as a dictionary to the `FreeCAD.svgpatterns`
attribute.
"""
import importSVG
FreeCAD.svgpatterns = {}
# Getting default patterns in the resource file
patfiles = QtCore.QDir(":/patterns").entryList()
for fn in patfiles:
file = ":/patterns/" + str(fn)
f = QtCore.QFile(file)
f.open(QtCore.QIODevice.ReadOnly)
p = importSVG.getContents(str(f.readAll()), 'pattern', True)
if p:
for k in p:
p[k] = [p[k], file]
FreeCAD.svgpatterns.update(p)
# Get patterns in a user defined file
altpat = getParam("patternFile", "")
if os.path.isdir(altpat):
for f in os.listdir(altpat):
if f[-4:].upper() == ".SVG":
file = os.path.join(altpat, f)
p = importSVG.getContents(file, 'pattern')
if p:
for k in p:
p[k] = [p[k], file]
FreeCAD.svgpatterns.update(p)
loadSvgPatterns = load_svg_patterns
def svg_patterns():
"""Return a dictionary with installed SVG patterns.
Returns
-------
dict
Returns `FreeCAD.svgpatterns` if it exists.
Otherwise it calls `load_svg_patterns` to create it
before returning it.
"""
if hasattr(FreeCAD, "svgpatterns"):
return FreeCAD.svgpatterns
else:
loadSvgPatterns()
if hasattr(FreeCAD, "svgpatterns"):
return FreeCAD.svgpatterns
return {}
svgpatterns = svg_patterns
def get_movable_children(objectslist, recursive=True):
"""Return a list of objects with child objects that move with a host.
Builds a list of objects with all child objects (`obj.OutList`)
that have their `MoveWithHost` attribute set to `True`.
This function is mostly useful for Arch Workbench objects.
Parameters
----------
objectslist : list of App::DocumentObject
A single scripted object or list of objects.
recursive : bool, optional
It defaults to `True`, in which case the function
is called recursively to also extract the children of children
objects.
Otherwise, only direct children of the input objects
are added to the output list.
Returns
-------
list
List of children objects that have their `MoveWithHost` attribute
set to `True`.
"""
added = []
if not isinstance(objectslist, list):
objectslist = [objectslist]
for obj in objectslist:
# Skips some objects that should never move their children
if getType(obj) not in ("Clone", "SectionPlane",
"Facebinder", "BuildingPart"):
children = obj.OutList
if hasattr(obj, "Proxy"):
if obj.Proxy:
if (hasattr(obj.Proxy, "getSiblings")
and getType(obj) not in ("Window")):
# children.extend(obj.Proxy.getSiblings(obj))
pass
for child in children:
if hasattr(child, "MoveWithHost"):
if child.MoveWithHost:
if hasattr(obj, "CloneOf"):
if obj.CloneOf:
if obj.CloneOf.Name != child.Name:
added.append(child)
else:
added.append(child)
else:
added.append(child)
if recursive:
added.extend(getMovableChildren(children))
return added
getMovableChildren = get_movable_children
def utf8_decode(text):
"""Decode the input string and return a unicode string.
Python 2:
::
str -> unicode
unicode -> unicode
Python 3:
::
str -> str
bytes -> str
It runs
::
try:
return text.decode("utf-8")
except AttributeError:
return text
Parameters
----------
text : str, unicode or bytes
A str, unicode, or bytes object that may have unicode characters
like accented characters.
In Python 2, a `bytes` object can include accented characters,
but in Python 3 it must only contain ASCII literal characters.
Returns
-------
unicode or str
In Python 2 it will try decoding the `bytes` string
and return a `'utf-8'` decoded string.
>>> "".decode("utf-8")
>>> b"".decode("utf-8")
u'A\\xe1'
In Python 2 the unicode string is prefixed with `u`,
and unicode characters are replaced by their two-digit hexadecimal
representation, or four digit unicode escape.
>>> "AáBẃCñ".decode("utf-8")
u'A\\xe1B\\u1e83C\\xf1'
In Python 2 it will always return a `unicode` object.
In Python 3 a regular string is already unicode encoded,
so strings have no `decode` method. In this case, `text`
will be returned as is.
In Python 3, if `text` is a `bytes` object, then it will be converted
to `str`; in this case, the `bytes` object cannot have accents,
it must only contain ASCII literal characters.
>>> b"ABC".decode("utf-8")
'ABC'
In Python 3 it will always return a `str` object, with no prefix.
"""
try:
return text.decode("utf-8")
except AttributeError:
return text