o gi$@sddZddlZddlZddlmZddlmZddlmZddlm Z GdddZ Gd d d Z dS) zw Base Transformer implementation. Add children to handle specific cases (transforming dictionaries, arrays, xref, etc) N)HighLevelTokenizer) AnyPDFType) Reference) EventListenerc @s`eZdZdZ    d dejedejejdejeje j e j e j fdeje fddZdS) ReadTransformerStatea This class represents all the meta-information used in the process of reading a PDF document. This includes: - the root object (the Document itself) - the tokenizer - references that have been resolved (to avoid endless loops) - etc Npassword root_objectsource tokenizercCs*t|_||_||_d|_||_||_dS)N)setindirect_reference_chainrrsecurity_handlerr r )selfrrr r rL/home/ubuntu/.local/lib/python3.10/site-packages/borb/io/read/transformer.py__init__s   zReadTransformerState.__init__)NNNN)__name__ __module__ __qualname____doc__typingOptionalstrAnyUnionioBufferedIOBase RawIOBaseBytesIOrrrrrrrs" rc @seZdZdZddZdefddZddd Zd ej e j e j e j efdefd d Zdejdfd dZdddZdgfdej e j e j efdejdejedejedejf ddZdS) Transformerz Base Transformer implementation. Add children to handle specific cases (transforming dictionaries, arrays, xref, etc) cCsg|_d|_d|_d|_dS)Nr) _children_invocation_count_level_parentrrrrrBs zTransformer.__init__returncCsTz#|}|g}|dur!|}||vrWdS|||dus WdSWdSYdS)NTF) get_parentappend)robject_to_transformpparentsrrr_is_recursive_objectLs  z Transformer._is_recursive_objectchild_transformercCs|j|||_|S)ac Add a child ReadBaseTransformer to this ReadBaseTransformer. Child transformers can be used to encapsulate specific object-creation/transformation logic. e.g. creating XREF, converting arrays, dictionaries, etc :param handler: the ReadBaseTransformer implementation to be added :type handler: Transformer )r r'r#)rr,rrradd_child_transformer]s z!Transformer.add_child_transformerobjectcCsdS)z{ This function returns True if the object to be transformed can be transformed by this ReadBaseTransformer Fr)rr.rrrcan_be_transformediszTransformer.can_be_transformedcCs|jS)zc This functions returns all child ReadBaseTransformers of this ReadBaseTransformer )r r$rrr get_childrenrszTransformer.get_childrencCs"|}|jdur|j}|jdus|S)aD This function returns the top-level ReadBaseTransformer. This is useful when delegating calls from inside a ReadBaseTransformer to another. e.g. Transforming a dictionary by reading its delimiters and then transforming each key/value in turn by calling top-level ReadBaseTransformer N)r#)rr)rrrget_root_transformerxs   z Transformer.get_root_transformerNr( parent_objectcontextevent_listenerscCsl||r|S|jD])}||r3|jd7_|jd7_|j||||d}|jd8_|Sq dS)z This function reads an object from a byte stream. The object being read depends on the implementation of ReadBaseTransformer. )r2r3r4N)r+r r/r"r! transform)rr(r2r3r4houtrrrr6s    zTransformer.transform)r,rr%r)r%r)rrrrrboolr+r-rrrrrrrr/Listr0r1rrrrr6rrrrr8s2     r) rrr*borb.io.read.tokenize.high_level_tokenizerrborb.io.read.typesrr$borb.pdf.canvas.event.event_listenerrrrrrrrs    '