class PyTypedArray:
"""
PyTypedArray is the base class that wraps the JavaScript TypedArray objects.
The derived objects provides an interface to the JavaScript array objects:
PyUint8ClampedArray [Uint8ClampedArray]
PyUint8Array [Uint8Array]
PyUint16Array [Uint16Array]
PyUint32Array [Uint32Array]
PyInt8Array [Int8Array]
PyInt16Array [Int16Array]
PyInt32Array [Int32Array]
PyFloat32Array [Float32Array]
PyFloat64Array [Float64Array]
The PyTypedArray interface include index syntax, iteration, and math operations.
The module contains an Ndarray class to instantiate N-dimensional arrays, and PyImageData and PyImageMatrix classes that provide an interface to canvas ImageData.
"""
def __init__(self, data=None, offset=None, length=None, typedarray=None):
"""
The PyTypedArray is instantiated with either the array size, an array of the TypedArray or Python type, or an existing ArrayBuffer to view, which creates a new TypedArray of size and included data as the specified type. Optional arguments include offset index at which ArrayBuffer data is inserted and length of an ArrayBuffer.
"""
if data:
if isinstance(data, int):
if pyjs_mode.optimized:
self.__data = JS("""new @{{typedarray}}(@{{data}})""")
else:
self.__data = JS(
"""new @{{typedarray}}(@{{data}}['valueOf']())""")
elif isinstance(data, (list, tuple)):
if pyjs_mode.optimized:
self.__data = JS(
"""new @{{typedarray}}(@{{data}}['getArray']())""")
else:
data = [dat.valueOf() for dat in data]
self.__data = JS(
"""new @{{typedarray}}(@{{data}}['getArray']())""")
elif isinstance(data, PyTypedArray):
self.__data = JS(
"""new @{{typedarray}}(@{{data}}['__data'])""")
else: #TypedArray or ArrayBuffer
if offset is None and length is None:
self.__data = JS("""new @{{typedarray}}(@{{data}})""")
else:
if offset is None:
offset = 0
if length is None:
self.__data = JS(
"""new @{{typedarray}}(@{{data}}, @{{offset}})""")
else:
self.__data = JS(
"""new @{{typedarray}}(@{{data}}, @{{offset}}, @{{length}})"""
)
else:
self.__data = None
def __str__(self):
"""
Return string representation of PyTypedArray object.
"""
return self.__data.toString()
def __iter__(self):
"""
Iterate over PyTypedArray object.
"""
index = 0
while index < self.__data.length:
yield self[index]
index += 1
def __getitem__(self, index):
"""
Get TypedArray element by index.
"""
return JS("""@{{int}}(@{{self}}['__data'][@{{index}}]);""")
def __setitem__(self, index, value):
"""
Set TypedArray element by index.
"""
if pyjs_mode.optimized:
JS("""@{{self}}['__data'][@{{index}}]=@{{value}};""")
else:
value = value.valueOf()
JS("""@{{self}}['__data'][@{{index}}]=@{{value}};""")
return None
def __len__(self):
"""
Get TypedArray array length.
"""
return self.__data.length
def set(self, data, offset=0):
"""
Set data to the array. Arguments: data is a list of either the TypedArray or Python type, offset is the start index where data will be set (defaults to 0).
"""
if isinstance(data, (list, tuple)):
if pyjs_mode.optimized:
self.__data.set(data.getArray(), offset)
else:
data = [dat.valueOf() for dat in data]
self.__data.set(data.getArray(), offset)
elif isinstance(data, PyTypedArray):
self.__data.set(data.__data, offset)
def subarray(self, begin, end=None):
"""
Retrieve a subarray of the array. The subarray is a TypedArray and is a view of the derived array. Arguments begin and optional end (defaults to array end) are the index spanning the subarray.
"""
if end is None:
end = self.__data.length
array = self.__data.subarray(begin, end)
pytypedarray = self.__class__()
pytypedarray.__data = array
return pytypedarray
def getLength(self):
"""
Return array.length attribute.
"""
return self.__data.length
def getByteLength(self):
"""
Return array.byteLength attribute.
"""
return self.__data.byteLength
def getBuffer(self):
"""
Return array.buffer attribute.
"""
return self.__data.buffer
def getByteOffset(self):
"""
Return array.byteOffset attribute.
"""
return self.__data.byteOffset
def getBytesPerElement(self):
"""
Return array.BYTES_PER_ELEMENT attribute.
"""
return self.__data.BYTES_PER_ELEMENT
def getArray(self):
"""
Return JavaScript TypedArray.
"""
return self.__data
def setArray(self, array):
"""
Set JavaScript TypedArray.
"""
self.__data = array
return None
class PyTypedArray:
"""
PyTypedArray is the base class that wraps the JavaScript TypedArray objects.
The derived objects provides an interface to the JavaScript array objects:
PyUint8ClampedArray [Uint8ClampedArray]
PyUint8Array [Uint8Array]
PyUint16Array [Uint16Array]
PyUint32Array [Uint32Array]
PyInt8Array [Int8Array]
PyInt16Array [Int16Array]
PyInt32Array [Int32Array]
PyFloat32Array [Float32Array]
PyFloat64Array [Float64Array]
The PyTypedArray interface include index syntax, iteration, and math operations.
The module contains an Ndarray class to instantiate N-dimensional arrays, and PyImageData and PyImageMatrix classes that provide an interface to canvas ImageData.
"""
def __init__(self, data=None, offset=None, length=None, typedarray=None):
"""
The PyTypedArray is instantiated with either the array size, an array of the TypedArray or Python type, or an existing ArrayBuffer to view, which creates a new TypedArray of size and included data as the specified type. Optional arguments include offset index at which ArrayBuffer data is inserted and length of an ArrayBuffer.
"""
if data:
if isinstance(data, int):
if pyjs_mode.optimized:
self.__data = JS("""new @{{typedarray}}(@{{data}})""")
else:
self.__data = JS("""new @{{typedarray}}(@{{data}}['valueOf']())""")
elif isinstance(data, (list,tuple)):
if pyjs_mode.optimized:
self.__data = JS("""new @{{typedarray}}(@{{data}}['getArray']())""")
else:
data = [dat.valueOf() for dat in data]
self.__data = JS("""new @{{typedarray}}(@{{data}}['getArray']())""")
elif isinstance(data, PyTypedArray):
self.__data = JS("""new @{{typedarray}}(@{{data}}['__data'])""")
else: #TypedArray or ArrayBuffer
if offset is None and length is None:
self.__data = JS("""new @{{typedarray}}(@{{data}})""")
else:
if offset is None:
offset = 0
if length is None:
self.__data = JS("""new @{{typedarray}}(@{{data}}, @{{offset}})""")
else:
self.__data = JS("""new @{{typedarray}}(@{{data}}, @{{offset}}, @{{length}})""")
else:
self.__data = None
def __str__(self):
"""
Return string representation of PyTypedArray object.
"""
return self.__data.toString()
def __iter__(self):
"""
Iterate over PyTypedArray object.
"""
index = 0
while index < self.__data.length:
yield self[index]
index += 1
def __getitem__(self, index):
"""
Get TypedArray element by index.
"""
return JS("""@{{int}}(@{{self}}['__data'][@{{index}}]);""")
def __setitem__(self, index, value):
"""
Set TypedArray element by index.
"""
if pyjs_mode.optimized:
JS("""@{{self}}['__data'][@{{index}}]=@{{value}};""")
else:
value = value.valueOf()
JS("""@{{self}}['__data'][@{{index}}]=@{{value}};""")
return None
def __len__(self):
"""
Get TypedArray array length.
"""
return self.__data.length
def set(self, data, offset=0):
"""
Set data to the array. Arguments: data is a list of either the TypedArray or Python type, offset is the start index where data will be set (defaults to 0).
"""
if isinstance(data, (list,tuple)):
if pyjs_mode.optimized:
self.__data.set(data.getArray(), offset)
else:
data = [dat.valueOf() for dat in data]
self.__data.set(data.getArray(), offset)
elif isinstance(data, PyTypedArray):
self.__data.set(data.__data, offset)
def subarray(self, begin, end=None):
"""
Retrieve a subarray of the array. The subarray is a TypedArray and is a view of the derived array. Arguments begin and optional end (defaults to array end) are the index spanning the subarray.
"""
if end is None:
end = self.__data.length
array = self.__data.subarray(begin, end)
pytypedarray = self.__class__()
pytypedarray.__data = array
return pytypedarray
def getLength(self):
"""
Return array.length attribute.
"""
return self.__data.length
def getByteLength(self):
"""
Return array.byteLength attribute.
"""
return self.__data.byteLength
def getBuffer(self):
"""
Return array.buffer attribute.
"""
return self.__data.buffer
def getByteOffset(self):
"""
Return array.byteOffset attribute.
"""
return self.__data.byteOffset
def getBytesPerElement(self):
"""
Return array.BYTES_PER_ELEMENT attribute.
"""
return self.__data.BYTES_PER_ELEMENT
def getArray(self):
"""
Return JavaScript TypedArray.
"""
return self.__data
def setArray(self, array):
"""
Set JavaScript TypedArray.
"""
self.__data = array
return None
