Commit 579c5e31 authored by Dmitriy Zaporozhets's avatar Dmitriy Zaporozhets
Browse files

Merge branch 'rs-issue-1651' into 'master'

Customize the sanitization whitelist only once

Fixes #1651

See merge request !687
......@@ -8,28 +8,33 @@ module Markdown
# Extends HTML::Pipeline::SanitizationFilter with a custom whitelist.
class SanitizationFilter < HTML::Pipeline::SanitizationFilter
def whitelist
whitelist = HTML::Pipeline::SanitizationFilter::WHITELIST
whitelist = super
# Allow code highlighting
whitelist[:attributes]['pre'] = %w(class)
whitelist[:attributes]['span'] = %w(class)
# Only push these customizations once
unless customized?(whitelist[:transformers])
# Allow code highlighting
whitelist[:attributes]['pre'] = %w(class)
whitelist[:attributes]['span'] = %w(class)
# Allow table alignment
whitelist[:attributes]['th'] = %w(style)
whitelist[:attributes]['td'] = %w(style)
# Allow table alignment
whitelist[:attributes]['th'] = %w(style)
whitelist[:attributes]['td'] = %w(style)
# Allow span elements
whitelist[:elements].push('span')
# Allow span elements
whitelist[:elements].push('span')
# Remove `rel` attribute from `a` elements
whitelist[:transformers].push(remove_rel)
# Remove `rel` attribute from `a` elements
whitelist[:transformers].push(remove_rel)
# Remove `class` attribute from non-highlight spans
whitelist[:transformers].push(clean_spans)
# Remove `class` attribute from non-highlight spans
whitelist[:transformers].push(clean_spans)
end
whitelist
end
private
def remove_rel
lambda do |env|
if env[:node_name] == 'a'
......@@ -48,6 +53,10 @@ def clean_spans
end
end
end
def customized?(transformers)
transformers.last.source_location[0] == __FILE__
end
end
end
end
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