74 lines
2.4 KiB
Ruby
74 lines
2.4 KiB
Ruby
require 'chunks/wiki'
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# Includes the contents of another page for rendering.
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# The include command looks like this: "[[!include PageName]]".
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# It is a WikiReference since it refers to another page (PageName)
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# and the wiki content using this command must be notified
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# of changes to that page.
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# If the included page could not be found, a warning is displayed.
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class Include < WikiChunk::WikiReference
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INCLUDE_PATTERN = /\[\[!include\s+([^\]\s][^\]]*?)\s*\]\]/i
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def self.pattern() INCLUDE_PATTERN end
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def initialize(match_data, content)
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super
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@page_name = match_data[1].strip
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rendering_mode = content.options[:mode] || :show
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add_to_include_list
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@unmask_text = get_unmask_text_avoiding_recursion_loops(rendering_mode)
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end
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private
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def get_unmask_text_avoiding_recursion_loops(rendering_mode)
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if refpage
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return "<em>Recursive include detected: #{@content.page_name} " +
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"→ #{@content.page_name}</em>\n" if self_inclusion(refpage)
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renderer = PageRenderer.new(refpage.current_revision)
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included_content =
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case rendering_mode
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when :show then renderer.display_content
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when :publish then renderer.display_published
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when :export then renderer.display_content_for_export
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when :s5 then renderer.display_s5
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else
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raise "Unsupported rendering mode #{@mode.inspect}"
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end
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# redirects and categories of included pages should not be inherited
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@content.merge_chunks(included_content.delete_chunks!([Redirect, Category]))
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clear_include_list
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return included_content.pre_rendered
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else
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clear_include_list
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return "<em>Could not include #{@page_name}</em>\n"
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end
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end
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# We track included pages in a thread-local variable.
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# This allows a multi-threaded Rails to handle multiple
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# simultaneous requests (one request/thread), without
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# getting confused.
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def add_to_include_list
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Thread.current[:chunk_included_by] ?
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Thread.current[:chunk_included_by].push(@content.page_name) :
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Thread.current[:chunk_included_by] = [@content.page_name]
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end
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def clear_include_list
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Thread.current[:chunk_included_by] = []
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end
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def self_inclusion(refpage)
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if Thread.current[:chunk_included_by].include?(refpage.page.name)
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@content.delete_chunk(self)
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clear_include_list
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else
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return false
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end
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end
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end
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