class Crowbar::Rules::PDFRule

Overview

Structure-preserving rule for Portable Document Format (PDF) files. Preserves %PDF- header, indirect object framing (N 0 obj ... endobj), stream delimiters (stream ... endstream), and trailer xref offsets, while mutating dictionary keys/values, numeric bounds, filters, and stream bodies.

Defined in:

crowbar/rules/pdf.cr

Constant Summary

PDF_MAGIC = "%PDF-".to_slice

Instance Method Summary

Instance methods inherited from class Crowbar::Rule

apply(context : Context, buffer : Buffer) : Bool apply, description : String description, match?(buffer : Buffer) : Bool match?, name : String name, targets(*targets : Symbol) targets, weight : Float64 weight, weight=(weight : Float64) weight=

Constructor methods inherited from class Crowbar::Rule

new(weight : Float64 = 1.0) new

Instance Method Detail

def apply(context : Context, buffer : Buffer) : Bool #
Description copied from class Crowbar::Rule

Applies a structure-preserving transformation to the buffer


def description : String #

def match?(buffer : Buffer) : Bool #
Description copied from class Crowbar::Rule

Checks whether the buffer matches the format handled by this rule


def name : String #