instiki/lib/page_renderer.rb

122 lines
3.8 KiB
Ruby

require 'diff'
# Temporary class containing all rendering stuff from a Revision
# I want to shift all rendering loguc to the controller eventually
class PageRenderer
def self.setup_url_generator(url_generator)
@@url_generator = url_generator
end
def self.teardown_url_generator
@@url_generator = nil
end
attr_reader :revision
def initialize(revision = nil)
self.revision = revision
end
def revision=(r)
@revision = r
@wiki_words_cache = @wiki_includes_cache = @wiki_references_cache = nil
end
def display_content
render
end
def display_content_for_export
render :mode => :export
end
def display_published
render :mode => :publish
end
def display_diff
previous_revision = @revision.page.previous_revision(@revision)
if previous_revision
rendered_previous_revision = WikiContent.new(previous_revision, @@url_generator).render!
HTMLDiff.diff(rendered_previous_revision, display_content)
else
display_content
end
end
# Returns an array of all the WikiIncludes present in the content of this revision.
def wiki_includes
unless @wiki_includes_cache
chunks = display_content.find_chunks(Include)
@wiki_includes_cache = chunks.map { |c| ( c.escaped? ? nil : c.page_name ) }.compact.uniq
end
@wiki_includes_cache
end
# Returns an array of all the WikiReferences present in the content of this revision.
def wiki_references
unless @wiki_references_cache
chunks = display_content.find_chunks(WikiChunk::WikiReference)
@wiki_references_cache = chunks.map { |c| ( c.escaped? ? nil : c.page_name ) }.compact.uniq
end
@wiki_references_cache
end
# Returns an array of all the WikiWords present in the content of this revision.
def wiki_words
unless @wiki_words_cache
wiki_chunks = display_content.find_chunks(WikiChunk::WikiLink)
@wiki_words_cache = wiki_chunks.map { |c| ( c.escaped? ? nil : c.page_name ) }.compact.uniq
end
@wiki_words_cache
end
# Returns an array of all the WikiWords present in the content of this revision.
# that already exists as a page in the web.
def existing_pages
wiki_words.select { |wiki_word| @revision.page.web.page(wiki_word) }
end
# Returns an array of all the WikiWords present in the content of this revision
# that *doesn't* already exists as a page in the web.
def unexisting_pages
wiki_words - existing_pages
end
private
def render(options = {})
result = WikiContent.new(@revision, @@url_generator, options).render!
WikiReference.delete_all ['page_id = ?', @revision.page_id]
references = @revision.page.wiki_references
wiki_word_chunks = result.find_chunks(WikiChunk::WikiLink)
wiki_words = wiki_word_chunks.map { |c| ( c.escaped? ? nil : c.page_name ) }.compact.uniq
wiki_words.each do |referenced_name|
# Links to self are always considered linked
if referenced_name == @revision.page.name
link_type = WikiReference::LINKED_PAGE
else
link_type = WikiReference.link_type(@revision.page.web, referenced_name)
end
references.create :referenced_name => referenced_name, :link_type => link_type
end
include_chunks = result.find_chunks(Include)
includes = include_chunks.map { |c| ( c.escaped? ? nil : c.page_name ) }.compact.uniq
includes.each do |included_page_name|
references.create :referenced_name => included_page_name,
:link_type => WikiReference::INCLUDED_PAGE
end
categories = result.find_chunks(Category).map { |cat| cat.list }.flatten
categories.each do |category|
references.create :referenced_name => category, :link_type => WikiReference::CATEGORY
end
result
end
end