class HexaPDF::CLI::Optimize
Optimizes the size of a PDF file.
Private Instance Methods
optimize_page_tree(doc)
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Optimizes the page tree by flattening it and deleting unsed objects.
# File lib/hexapdf/cli/optimize.rb, line 82 def optimize_page_tree(doc) page_tree = doc.add({Type: :Pages}) retained = {page_tree.data => true} doc.pages.each do |page| page.value.update(page.copy_inherited_values) page_tree.add_page(page) retained[page.data] = true end doc.catalog[:Pages] = page_tree doc.each(only_current: false) do |obj, revision| next unless obj.kind_of?(HexaPDF::Dictionary) if (obj.type == :Pages || obj.type == :Page) && !retained.key?(obj.data) revision.delete(obj) end end end