Ng&dZddlmZddlmZddlmZmZmZddl m Z m Z m Z m Z mZmZmZddlmZerddlmZeee dfZeeefZee e fZeeefZGd d eZ dddZddZdS)zContent stream parsing.) annotations) Collection) TYPE_CHECKINGUnioncast)ContentStreamInlineImageContentStreamInstructionObject ObjectTypePagePdfError_unparse_content_stream)Operator)PdfInlineImagerc$eZdZdZdfd ZxZS)PdfParsingErrorz(Error when parsing a PDF content stream.Ncf|sd|}t|||_dS)Nz&Error encoding content stream at line )super__init__line)selfmessager __class__s Z/var/www/html/ai-engine/env/lib/python3.11/site-packages/pikepdf/models/_content_stream.pyrzPdfParsingError.__init__'s< FEtEEG !!! )NN)__name__ __module__ __qualname____doc__r __classcell__)rs@rrr$sC22rrpage_or_stream Object | Page operatorsstrreturnlist[ContentStreamInstructions]ct|ttfstdt|tr=|jt jkr(|ddkrtdt|tr|j} |ddkr6|}ttt| |}n5|}ttttj ||}n6#t$r)}dt|vrtd|||d}~wwxYw|S)aZParse a PDF content stream into a sequence of instructions. A PDF content stream is list of instructions that describe where to render the text and graphics in a PDF. This is the starting point for analyzing PDFs. If the input is a page and page.Contents is an array, then the content stream is automatically treated as one coalesced stream. Each instruction contains at least one operator and zero or more operands. This function does not have anything to do with opening a PDF file itself or processing data from a whole PDF. It is for processing a specific object inside a PDF that is already opened. Args: page_or_stream: A page object, or the content stream attached to another object such as a Form XObject. operators: A space-separated string of operators to whitelist. For example 'q Q cm Do' will return only operators that pertain to drawing images. Use 'BI ID EI' for inline images. All other operators and associated tokens are ignored. If blank, all tokens are accepted. Example: >>> with pikepdf.Pdf.open("../tests/resources/pal-1bit-trivial.pdf") as pdf: ... page = pdf.pages[0] ... for operands, command in pikepdf.parse_content_stream(page): ... print(command) q cm Do Q .. versionchanged:: 3.0 Returns a list of ``ContentStreamInstructions`` instead of a list of (operand, operator) tuples. The returned items are duck-type compatible with the previous returned items. z/stream must be a pikepdf.Object or pikepdf.Pagez/Typez/Pagez4parse_content_stream called on page or stream objectz#supposed to be a stream or an arrayz0parse_content_stream called on non-stream ObjectN) isinstancer r TypeError _type_coder streamgetobjrlistContentStreamInstructions_parse_page_contents_grouped_parse_stream_groupedr r%)r"r$page instructionsr,es rparse_content_streamr6.sdT nvtn 5 5KIJJJ >6**P  %): : :   w ' '7 2 2NOOO.$'','+   g & &' 1 1!D./11)<<LL $F./,VY??L  0CFF : :NOOUV VQ sBD E*$EEr40Collection[UnparseableContentStreamInstructions]bytesc t|S#tttf$r}t d|d}~wwxYw)aConvert collection of instructions to bytes suitable for storing in PDF. Given a parsed list of instructions/operand-operators, convert to bytes suitable for embedding in a PDF. In PDF the operator always follows the operands. Args: instructions: collection of instructions such as is returned by :func:`parse_content_stream()` Returns: A binary content stream, suitable for attaching to a Pdf. To attach to a Pdf, use :meth:`Pdf.make_stream()``. .. versionchanged:: 3.0 Now accept collections that contain any mixture of ``ContentStreamInstruction``, ``ContentStreamInlineImage``, and the older operand-operator tuples from pikepdf 2.x. z3While unparsing a content stream, an error occurredN)r ValueErrorr* RuntimeErrorr)r4r5s runparse_content_streamr<zsS*&|444  < 0 A   s=8=N)r!)r"r#r$r%r&r')r4r7r&r8)r __future__rcollections.abcrtypingrrr pikepdf._corerr r r r r rpikepdf.objectsrpikepdf.models.imager_OldContentStreamOperandstuple_OldContentStreamInstructionsr0$UnparseableContentStreamInstructions Exceptionrr6r<rrrIs""""""&&&&&&----------%$$$$$4333333'uV5E-E'FG %&?&I J!":