Source code for pdftools_sdk.pdf.signature_field

from __future__ import annotations
import io
from typing import List, Iterator, Tuple, Optional, Any, TYPE_CHECKING, Callable
from ctypes import *
from datetime import datetime
from numbers import Number
from pdftools_sdk.internal import _lib
from pdftools_sdk.internal.utils import _string_to_utf16, _utf16_to_string
from pdftools_sdk.internal.streams import _StreamDescriptor, _NativeStream
from pdftools_sdk.internal.native_base import _NativeBase
from pdftools_sdk.internal.native_object import _NativeObject
from abc import ABC

import pdftools_sdk.internal

if TYPE_CHECKING:
    from pdftools_sdk.geometry.units.rectangle import Rectangle

else:
    Rectangle = "pdftools_sdk.geometry.units.rectangle.Rectangle"


[docs] class SignatureField(_NativeObject, ABC): """ A digital signature field """ @property def field_name(self) -> Optional[str]: """ The name of the signature field The field name uniquely identifies the signature field within the document. Returns: Optional[str] Raises: StateError: If the object has already been closed """ _lib.PdfToolsPdf_SignatureField_GetFieldNameW.argtypes = [c_void_p, POINTER(c_wchar), c_size_t] _lib.PdfToolsPdf_SignatureField_GetFieldNameW.restype = c_size_t ret_val_size = _lib.PdfToolsPdf_SignatureField_GetFieldNameW(self._handle, None, 0) if ret_val_size == 0: _NativeBase._throw_last_error() return None ret_val = create_unicode_buffer(ret_val_size) _lib.PdfToolsPdf_SignatureField_GetFieldNameW(self._handle, ret_val, c_size_t(ret_val_size)) return _utf16_to_string(ret_val, ret_val_size) @property def page_number(self) -> int: """ The number of the page where this signature is located Whether the signature field has a visual appearance on that page is indicated by the :attr:`pdftools_sdk.pdf.signature_field.SignatureField.bounding_box` . Returns: int Raises: StateError: If the object has already been closed. pdftools_sdk.not_found_error.NotFoundError: If the field is not properly linked to a page. """ _lib.PdfToolsPdf_SignatureField_GetPageNumber.argtypes = [c_void_p] _lib.PdfToolsPdf_SignatureField_GetPageNumber.restype = c_int ret_val = _lib.PdfToolsPdf_SignatureField_GetPageNumber(self._handle) if ret_val == 0: _NativeBase._throw_last_error() return ret_val @property def bounding_box(self) -> Optional[Rectangle]: """ The location on the page The location of the signature field on the page. Or `None` if the signature field has no visual appearance. Returns: Optional[pdftools_sdk.geometry.units.rectangle.Rectangle] Raises: StateError: If the object has already been closed """ from pdftools_sdk.geometry.units.rectangle import Rectangle _lib.PdfToolsPdf_SignatureField_GetBoundingBox.argtypes = [c_void_p, POINTER(Rectangle)] _lib.PdfToolsPdf_SignatureField_GetBoundingBox.restype = c_bool ret_val = Rectangle() if not _lib.PdfToolsPdf_SignatureField_GetBoundingBox(self._handle, byref(ret_val)): _NativeBase._throw_last_error() return None return ret_val @staticmethod def _create_dynamic_type(handle): _lib.PdfToolsPdf_SignatureField_GetType.argtypes = [c_void_p] _lib.PdfToolsPdf_SignatureField_GetType.restype = c_int obj_type = _lib.PdfToolsPdf_SignatureField_GetType(handle) # Create and return the object based on the type if obj_type == 0: return SignatureField._from_handle(handle) elif obj_type == 1: from pdftools_sdk.pdf.unsigned_signature_field import UnsignedSignatureField return UnsignedSignatureField._from_handle(handle) elif obj_type == 2: from pdftools_sdk.pdf.signed_signature_field import SignedSignatureField return SignedSignatureField._from_handle(handle) elif obj_type == 3: from pdftools_sdk.pdf.signature import Signature return Signature._from_handle(handle) elif obj_type == 4: from pdftools_sdk.pdf.document_signature import DocumentSignature return DocumentSignature._from_handle(handle) elif obj_type == 5: from pdftools_sdk.pdf.certification_signature import CertificationSignature return CertificationSignature._from_handle(handle) elif obj_type == 6: from pdftools_sdk.pdf.document_timestamp import DocumentTimestamp return DocumentTimestamp._from_handle(handle) else: return None @classmethod def _from_handle(cls, handle): """ Internal factory method for constructing an instance using an internal handle. This method creates an instance of the class by bypassing the public constructor. """ instance = SignatureField.__new__(cls) # Bypass __init__ instance._initialize(handle) return instance def _initialize(self, handle): super()._initialize(handle)