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# coding: utf-8
# /*##########################################################################
#
# Copyright (c) 2017 European Synchrotron Radiation Facility
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
# ###########################################################################*/
"""This package provides a class sharred by widgets to format HDF5 data as
text."""
__authors__ = ["V. Valls"]
__license__ = "MIT"
__date__ = "06/06/2018"
import numpy
from silx.third_party import six
from silx.gui import qt
from silx.gui.data.TextFormatter import TextFormatter
try:
import h5py
except ImportError:
h5py = None
class Hdf5Formatter(qt.QObject):
"""Formatter to convert HDF5 data to string.
"""
formatChanged = qt.Signal()
"""Emitted when properties of the formatter change."""
def __init__(self, parent=None, textFormatter=None):
"""
Constructor
:param qt.QObject parent: Owner of the object
:param TextFormatter formatter: Text formatter
"""
qt.QObject.__init__(self, parent)
if textFormatter is not None:
self.__formatter = textFormatter
else:
self.__formatter = TextFormatter(self)
self.__formatter.formatChanged.connect(self.__formatChanged)
def textFormatter(self):
"""Returns the used text formatter
:rtype: TextFormatter
"""
return self.__formatter
def setTextFormatter(self, textFormatter):
"""Set the text formatter to be used
:param TextFormatter textFormatter: The text formatter to use
"""
if textFormatter is None:
raise ValueError("Formatter expected but None found")
if self.__formatter is textFormatter:
return
self.__formatter.formatChanged.disconnect(self.__formatChanged)
self.__formatter = textFormatter
self.__formatter.formatChanged.connect(self.__formatChanged)
self.__formatChanged()
def __formatChanged(self):
self.formatChanged.emit()
def humanReadableShape(self, dataset):
if dataset.shape is None:
return "none"
if dataset.shape == tuple():
return "scalar"
shape = [str(i) for i in dataset.shape]
text = u" \u00D7 ".join(shape)
return text
def humanReadableValue(self, dataset):
if dataset.shape is None:
return "No data"
dtype = dataset.dtype
if dataset.dtype.type == numpy.void:
if dtype.fields is None:
return "Raw data"
if dataset.shape == tuple():
numpy_object = dataset[()]
text = self.__formatter.toString(numpy_object, dtype=dataset.dtype)
else:
if dataset.size < 5 and dataset.compression is None:
numpy_object = dataset[0:5]
text = self.__formatter.toString(numpy_object, dtype=dataset.dtype)
else:
dimension = len(dataset.shape)
if dataset.compression is not None:
text = "Compressed %dD data" % dimension
else:
text = "%dD data" % dimension
return text
def humanReadableType(self, dataset, full=False):
if hasattr(dataset, "dtype"):
dtype = dataset.dtype
else:
# Fallback...
dtype = type(dataset)
return self.humanReadableDType(dtype, full)
def humanReadableDType(self, dtype, full=False):
if dtype == six.binary_type or numpy.issubdtype(dtype, numpy.string_):
text = "string"
if full:
text = "ASCII " + text
return text
elif dtype == six.text_type or numpy.issubdtype(dtype, numpy.unicode_):
text = "string"
if full:
text = "UTF-8 " + text
return text
elif dtype.type == numpy.object_:
ref = h5py.check_dtype(ref=dtype)
if ref is not None:
return "reference"
vlen = h5py.check_dtype(vlen=dtype)
if vlen is not None:
text = self.humanReadableDType(vlen, full=full)
if full:
text = "variable-length " + text
return text
return "object"
elif dtype.type == numpy.bool_:
return "bool"
elif dtype.type == numpy.void:
if dtype.fields is None:
return "opaque"
else:
if not full:
return "compound"
else:
fields = sorted(dtype.fields.items(), key=lambda e: e[1][1])
compound = [d[1][0] for d in fields]
compound = [self.humanReadableDType(d) for d in compound]
return "compound(%s)" % ", ".join(compound)
elif numpy.issubdtype(dtype, numpy.integer):
if h5py is not None:
enumType = h5py.check_dtype(enum=dtype)
if enumType is not None:
return "enum"
text = str(dtype.newbyteorder('N'))
if numpy.issubdtype(dtype, numpy.floating):
if hasattr(numpy, "float128") and dtype == numpy.float128:
text = "float80"
if full:
text += " (padding 128bits)"
elif hasattr(numpy, "float96") and dtype == numpy.float96:
text = "float80"
if full:
text += " (padding 96bits)"
if full:
if dtype.byteorder == "<":
text = "Little-endian " + text
elif dtype.byteorder == ">":
text = "Big-endian " + text
elif dtype.byteorder == "=":
text = "Native " + text
dtype = dtype.newbyteorder('N')
return text
def humanReadableHdf5Type(self, dataset):
"""Format the internal HDF5 type as a string"""
t = dataset.id.get_type()
class_ = t.get_class()
if class_ == h5py.h5t.NO_CLASS:
return "NO_CLASS"
elif class_ == h5py.h5t.INTEGER:
return "INTEGER"
elif class_ == h5py.h5t.FLOAT:
return "FLOAT"
elif class_ == h5py.h5t.TIME:
return "TIME"
elif class_ == h5py.h5t.STRING:
charset = t.get_cset()
strpad = t.get_strpad()
text = ""
if strpad == h5py.h5t.STR_NULLTERM:
text += "NULLTERM"
elif strpad == h5py.h5t.STR_NULLPAD:
text += "NULLPAD"
elif strpad == h5py.h5t.STR_SPACEPAD:
text += "SPACEPAD"
else:
text += "UNKNOWN_STRPAD"
if t.is_variable_str():
text += " VARIABLE"
if charset == h5py.h5t.CSET_ASCII:
text += " ASCII"
elif charset == h5py.h5t.CSET_UTF8:
text += " UTF8"
else:
text += " UNKNOWN_CSET"
return text + " STRING"
elif class_ == h5py.h5t.BITFIELD:
return "BITFIELD"
elif class_ == h5py.h5t.OPAQUE:
return "OPAQUE"
elif class_ == h5py.h5t.COMPOUND:
return "COMPOUND"
elif class_ == h5py.h5t.REFERENCE:
return "REFERENCE"
elif class_ == h5py.h5t.ENUM:
return "ENUM"
elif class_ == h5py.h5t.VLEN:
return "VLEN"
elif class_ == h5py.h5t.ARRAY:
return "ARRAY"
else:
return "UNKNOWN_CLASS"
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