Class: Origami::PDF::LazyParser
- Inherits:
-
Parser
- Object
- Origami::Parser
- Parser
- Origami::PDF::LazyParser
- Defined in:
- lib/origami/parsers/pdf/lazy.rb
Overview
Create a new PDF lazy Parser.
Constant Summary
Constants inherited from Origami::Parser
Origami::Parser::VERBOSE_DEBUG, Origami::Parser::VERBOSE_INFO, Origami::Parser::VERBOSE_QUIET, Origami::Parser::VERBOSE_TRACE
Instance Attribute Summary
Attributes inherited from Origami::Parser
Instance Method Summary collapse
Methods inherited from Parser
Methods inherited from Origami::Parser
#debug, #defer_type_cast, #error, #info, init_scanner, #initialize, #parse_object, #parse_trailer, #parse_xreftable, #pos, #pos=, #target_data, #target_filename, #target_filesize, #trace, #warn
Constructor Details
This class inherits a constructor from Origami::PDF::Parser
Instance Method Details
#parse(stream) ⇒ Object
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# File 'lib/origami/parsers/pdf/lazy.rb', line 32 def parse(stream) super pdf = parse_initialize revisions = [] # Locate the last xref offset at the end of the file. xref_offset = locate_last_xref_offset while xref_offset and xref_offset != 0 # Create a new revision based on the xref section offset. revision = parse_revision(pdf, xref_offset) # Locate the previous xref section. if revision.xrefstm? and revision.xrefstm[:Prev].is_a?(Integer) xref_offset = revision.xrefstm[:Prev].to_i elsif revision.trailer[:Prev].is_a?(Integer) xref_offset = revision.trailer[:Prev].to_i else xref_offset = nil end # Prepend the revision. revisions.unshift(revision) end pdf.revisions.clear revisions.each do |rev| pdf.revisions.push(rev) pdf.insert(rev.xrefstm) if rev.xrefstm? end parse_finalize(pdf) pdf end |