2019-05-02 18:17:27 -04:00
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# frozen_string_literal: true
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2013-06-10 15:33:37 -04:00
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#
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# HTML emails don't support CSS, so we can use nokogiri to inline attributes based on
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# matchers.
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#
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module Email
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class Styles
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2014-08-21 06:54:05 -04:00
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@@plugin_callbacks = []
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2013-06-10 15:33:37 -04:00
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2016-05-21 14:13:00 -04:00
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attr_accessor :fragment
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delegate :css, to: :fragment
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2017-07-27 21:20:09 -04:00
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def initialize(html, opts = nil)
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2013-06-10 15:33:37 -04:00
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@html = html
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2015-10-22 13:10:07 -04:00
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@opts = opts || {}
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2016-01-29 05:13:59 -05:00
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@fragment = Nokogiri::HTML.fragment(@html)
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2019-07-30 15:05:08 -04:00
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@custom_styles = nil
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2013-06-10 15:33:37 -04:00
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end
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2014-08-21 06:54:05 -04:00
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def self.register_plugin_style(&block)
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@@plugin_callbacks.push(block)
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end
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2014-05-09 14:39:09 -04:00
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def add_styles(node, new_styles)
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existing = node['style']
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if existing.present?
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2014-11-07 16:42:57 -05:00
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# merge styles
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node['style'] = "#{new_styles}; #{existing}"
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2014-05-09 14:39:09 -04:00
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else
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node['style'] = new_styles
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end
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end
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2019-07-30 15:05:08 -04:00
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def custom_styles
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return @custom_styles unless @custom_styles.nil?
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css = EmailStyle.new.css
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@custom_styles = {}
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if !css.blank?
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2019-08-15 03:16:41 -04:00
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# there is a minor race condition here, CssParser could be
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# loaded by ::CssParser::Parser not loaded
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require 'css_parser' unless defined?(::CssParser::Parser)
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2019-07-30 15:05:08 -04:00
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2019-08-15 03:16:41 -04:00
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parser = ::CssParser::Parser.new(import: false)
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2019-07-30 15:05:08 -04:00
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parser.load_string!(css)
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parser.each_selector do |selector, value|
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@custom_styles[selector] ||= +''
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@custom_styles[selector] << value
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end
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end
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@custom_styles
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end
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2013-06-13 12:15:05 -04:00
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def format_basic
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2014-06-13 17:11:04 -04:00
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uri = URI(Discourse.base_url)
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2019-10-17 05:54:04 -04:00
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# Remove SVGs
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@fragment.css('svg, img[src$=".svg"]').remove
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2014-10-27 14:21:55 -04:00
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# images
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2016-01-29 05:13:59 -05:00
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@fragment.css('img').each do |img|
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2013-11-28 17:20:56 -05:00
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next if img['class'] == 'site-logo'
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2017-01-30 12:06:48 -05:00
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if (img['class'] && img['class']['emoji']) || (img['src'] && img['src'][/\/_?emoji\//])
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img['width'] = img['height'] = 20
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2013-06-13 12:15:05 -04:00
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else
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2014-11-14 20:33:42 -05:00
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# use dimensions of original iPhone screen for 'too big, let device rescale'
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2017-07-27 21:20:09 -04:00
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if img['width'].to_i > (320) || img['height'].to_i > (480)
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2017-01-30 12:06:48 -05:00
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img['width'] = img['height'] = 'auto'
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2014-11-14 19:23:52 -05:00
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end
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2013-06-13 12:15:05 -04:00
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end
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2017-01-30 12:06:48 -05:00
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if img['src']
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# ensure all urls are absolute
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img['src'] = "#{Discourse.base_url}#{img['src']}" if img['src'][/^\/[^\/]/]
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# ensure no schemaless urls
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img['src'] = "#{uri.scheme}:#{img['src']}" if img['src'][/^\/\//]
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2013-08-26 18:08:38 -04:00
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end
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2013-07-22 15:06:37 -04:00
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end
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2014-10-27 14:21:55 -04:00
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2015-11-04 06:38:39 -05:00
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# add max-width to big images
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2016-01-29 05:13:59 -05:00
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big_images = @fragment.css('img[width="auto"][height="auto"]') -
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@fragment.css('aside.onebox img') -
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@fragment.css('img.site-logo, img.emoji')
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2015-11-04 06:38:39 -05:00
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big_images.each do |img|
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2016-01-29 05:13:59 -05:00
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add_styles(img, 'max-width: 100%;') if img['style'] !~ /max-width/
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2015-11-04 06:38:39 -05:00
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end
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2016-12-05 07:31:43 -05:00
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# topic featured link
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@fragment.css('a.topic-featured-link').each do |e|
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e['style'] = "color:#858585;padding:2px 8px;border:1px solid #e6e6e6;border-radius:2px;box-shadow:0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);"
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end
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2014-10-27 14:21:55 -04:00
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# attachments
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2016-01-29 05:13:59 -05:00
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@fragment.css('a.attachment').each do |a|
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2014-10-27 14:21:55 -04:00
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# ensure all urls are absolute
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if a['href'] =~ /^\/[^\/]/
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a['href'] = "#{Discourse.base_url}#{a['href']}"
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end
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# ensure no schemaless urls
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if a['href'] && a['href'].starts_with?("//")
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a['href'] = "#{uri.scheme}:#{a['href']}"
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end
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end
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2013-07-26 03:27:46 -04:00
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end
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2013-07-22 15:06:37 -04:00
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2014-05-09 14:39:09 -04:00
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def onebox_styles
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# Links to other topics
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2017-01-02 03:03:03 -05:00
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style('aside.quote', 'padding: 12px 25px 2px 12px; margin-bottom: 10px;')
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2014-05-09 14:39:09 -04:00
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style('aside.quote div.info-line', 'color: #666; margin: 10px 0')
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2017-01-02 16:49:00 -05:00
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style('aside.quote .avatar', 'margin-right: 5px; width:20px; height:20px; vertical-align:middle;')
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2014-05-09 14:39:09 -04:00
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2015-10-22 16:08:52 -04:00
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style('blockquote', 'border-left: 5px solid #e9e9e9; background-color: #f8f8f8; margin: 0;')
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style('blockquote > p', 'padding: 1em;')
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2014-05-09 14:39:09 -04:00
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# Oneboxes
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2016-12-05 06:00:04 -05:00
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style('aside.onebox', "border: 5px solid #e9e9e9; padding: 12px 25px 12px 12px;")
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2017-12-05 03:38:30 -05:00
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style('aside.onebox header img.site-icon', "width: 16px; height: 16px; margin-right: 3px;")
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2016-12-05 06:00:04 -05:00
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style('aside.onebox header a[href]', "color: #222222; text-decoration: none;")
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style('aside.onebox .onebox-body', "clear: both")
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2019-10-17 05:54:04 -04:00
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style('aside.onebox .onebox-body img:not(.onebox-avatar-inline)', "max-height: 80%; max-width: 20%; height: auto; float: left; margin-right: 10px;")
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2019-03-05 12:31:50 -05:00
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style('aside.onebox .onebox-body img.thumbnail', "width: 60px;")
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2016-12-05 06:00:04 -05:00
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style('aside.onebox .onebox-body h3, aside.onebox .onebox-body h4', "font-size: 1.17em; margin: 10px 0;")
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style('.onebox-metadata', "color: #919191")
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2019-10-17 05:54:04 -04:00
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style('.github-info', "margin-top: 10px;")
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style('.github-info div', "display: inline; margin-right: 10px;")
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style('.onebox-avatar-inline', "float: none; vertical-align: middle;")
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2014-05-13 14:44:40 -04:00
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2017-01-02 03:03:03 -05:00
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@fragment.css('aside.quote blockquote > p').each do |p|
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p['style'] = 'padding: 0;'
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end
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# Convert all `aside.quote` tags to `blockquote`s
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@fragment.css('aside.quote').each do |n|
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original_node = n.dup
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original_node.search('div.quote-controls').remove
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blockquote = original_node.css('blockquote').inner_html.strip.start_with?("<p") ? original_node.css('blockquote').inner_html : "<p style='padding: 0;'>#{original_node.css('blockquote').inner_html}</p>"
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n.inner_html = original_node.css('div.title').inner_html + blockquote
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n.name = "blockquote"
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end
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2014-05-13 14:44:40 -04:00
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# Finally, convert all `aside` tags to `div`s
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2016-01-29 05:13:59 -05:00
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@fragment.css('aside, article, header').each do |n|
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2014-05-13 14:44:40 -04:00
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n.name = "div"
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end
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2014-07-14 16:41:05 -04:00
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# iframes can't go in emails, so replace them with clickable links
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2016-01-29 05:13:59 -05:00
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@fragment.css('iframe').each do |i|
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2014-07-14 16:41:05 -04:00
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begin
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2016-10-21 06:37:03 -04:00
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# sometimes, iframes are blacklisted...
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if i["src"].blank?
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i.remove
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next
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end
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2014-07-14 16:41:05 -04:00
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2019-04-24 04:20:27 -04:00
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src_uri = i["data-original-href"].present? ? URI(i["data-original-href"]) : URI(i['src'])
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2014-07-14 16:41:05 -04:00
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# If an iframe is protocol relative, use SSL when displaying it
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2016-07-04 05:29:12 -04:00
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display_src = "#{src_uri.scheme || 'https'}://#{src_uri.host}#{src_uri.path}#{src_uri.query.nil? ? '' : '?' + src_uri.query}#{src_uri.fragment.nil? ? '' : '#' + src_uri.fragment}"
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i.replace "<p><a href='#{src_uri.to_s}'>#{CGI.escapeHTML(display_src)}</a><p>"
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2018-08-14 06:23:32 -04:00
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rescue URI::Error
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2016-10-21 06:37:03 -04:00
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# If the URL is weird, remove the iframe
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2014-07-14 16:41:05 -04:00
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i.remove
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end
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end
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2013-06-13 12:15:05 -04:00
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end
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def format_html
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2019-07-30 16:46:20 -04:00
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correct_first_body_margin
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correct_footer_style
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correct_footer_style_hilight_first
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reset_tables
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2019-07-30 15:05:08 -04:00
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html_lang = SiteSetting.default_locale.sub("_", "-")
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style('html', nil, lang: html_lang, 'xml:lang' => html_lang)
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style('body', "text-align:#{ Rtl.new(nil).enabled? ? 'right' : 'left' };")
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style('body', nil, dir: Rtl.new(nil).enabled? ? 'rtl' : 'ltr')
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style('.with-dir',
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"text-align:#{ Rtl.new(nil).enabled? ? 'right' : 'left' };",
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dir: Rtl.new(nil).enabled? ? 'rtl' : 'ltr'
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)
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2016-12-19 11:19:10 -05:00
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style('.with-accent-colors', "background-color: #{SiteSetting.email_accent_bg_color}; color: #{SiteSetting.email_accent_fg_color};")
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2016-02-27 03:07:15 -05:00
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style('h4', 'color: #222;')
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2014-05-13 14:44:40 -04:00
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style('h3', 'margin: 15px 0 20px 0;')
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2013-07-26 03:27:46 -04:00
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style('hr', 'background-color: #ddd; height: 1px; border: 1px;')
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2016-12-19 11:19:10 -05:00
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style('a', "text-decoration: none; font-weight: bold; color: #{SiteSetting.email_link_color};")
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2013-07-26 03:27:46 -04:00
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style('ul', 'margin: 0 0 0 10px; padding: 0 0 0 20px;')
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style('li', 'padding-bottom: 10px')
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2019-07-30 16:46:20 -04:00
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style('div.summary-footer', 'color:#666; font-size:95%; text-align:center; padding-top:15px;')
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2013-11-29 13:00:10 -05:00
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style('span.post-count', 'margin: 0 5px; color: #777;')
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2013-12-16 14:41:59 -05:00
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style('pre', 'word-wrap: break-word; max-width: 694px;')
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2013-12-02 10:04:18 -05:00
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style('code', 'background-color: #f1f1ff; padding: 2px 5px;')
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2013-12-16 14:41:59 -05:00
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style('pre code', 'display: block; background-color: #f1f1ff; padding: 5px;')
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2016-12-19 11:19:10 -05:00
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style('.featured-topic a', "text-decoration: none; font-weight: bold; color: #{SiteSetting.email_link_color}; line-height:1.5em;")
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2019-07-30 15:05:08 -04:00
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style('.summary-email', "-moz-box-sizing:border-box;-ms-text-size-adjust:100%;-webkit-box-sizing:border-box;-webkit-text-size-adjust:100%;box-sizing:border-box;color:#0a0a0a;font-family:Helvetica,Arial,sans-serif;font-size:14px;font-weight:400;line-height:1.3;margin:0;min-width:100%;padding:0;width:100%")
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style('.previous-discussion', 'font-size: 17px; color: #444; margin-bottom:10px;')
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style('.notification-date', "text-align:right;color:#999999;padding-right:5px;font-family:'lucida grande',tahoma,verdana,arial,sans-serif;font-size:11px")
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style('.username', "font-size:13px;font-family:'lucida grande',tahoma,verdana,arial,sans-serif;color:#{SiteSetting.email_link_color};text-decoration:none;font-weight:bold")
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style('.user-title', "font-size:13px;font-family:'lucida grande',tahoma,verdana,arial,sans-serif;text-decoration:none;margin-left:7px;color: #999;")
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style('.user-name', "font-size:13px;font-family:'lucida grande',tahoma,verdana,arial,sans-serif;text-decoration:none;margin-left:7px;color: #{SiteSetting.email_link_color};font-weight:normal;")
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style('.post-wrapper', "margin-bottom:25px;")
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style('.user-avatar', 'vertical-align:top;width:55px;')
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style('.user-avatar img', nil, width: '45', height: '45')
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style('hr', 'background-color: #ddd; height: 1px; border: 1px;')
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style('.rtl', 'direction: rtl;')
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style('div.body', 'padding-top:5px;')
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style('.whisper div.body', 'font-style: italic; color: #9c9c9c;')
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style('.lightbox-wrapper .meta', 'display: none')
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style('div.undecorated-link-footer a', "font-weight: normal;")
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2014-01-22 15:30:30 -05:00
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2014-05-09 14:39:09 -04:00
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onebox_styles
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2014-08-21 06:54:05 -04:00
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plugin_styles
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2016-12-19 17:05:49 -05:00
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style('.post-excerpt img', "max-width: 50%; max-height: 400px;")
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2019-07-30 15:05:08 -04:00
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format_custom
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end
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def format_custom
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custom_styles.each do |selector, value|
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style(selector, value)
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end
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2014-08-21 06:54:05 -04:00
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end
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# this method is reserved for styles specific to plugin
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def plugin_styles
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2016-01-29 05:13:59 -05:00
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@@plugin_callbacks.each { |block| block.call(@fragment, @opts) }
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2013-07-26 03:27:46 -04:00
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end
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2013-06-10 15:33:37 -04:00
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2013-07-26 03:27:46 -04:00
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def to_html
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strip_classes_and_ids
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2014-06-13 17:11:04 -04:00
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replace_relative_urls
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2017-05-10 14:01:26 -04:00
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@fragment.to_html
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2013-07-26 03:27:46 -04:00
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end
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2013-06-10 15:33:37 -04:00
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2014-09-13 01:26:31 -04:00
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def strip_avatars_and_emojis
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2016-01-29 05:13:59 -05:00
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@fragment.search('img').each do |img|
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2017-06-15 10:36:11 -04:00
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next unless img['src']
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2017-01-30 12:06:48 -05:00
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if img['src'][/_avatar/]
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2017-06-15 10:36:11 -04:00
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img.parent['style'] = "vertical-align: top;" if img.parent&.name == 'td'
|
2014-09-13 01:26:31 -04:00
|
|
|
img.remove
|
|
|
|
end
|
|
|
|
|
2017-01-30 12:06:48 -05:00
|
|
|
if img['title'] && img['src'][/\/_?emoji\//]
|
2015-08-18 19:12:08 -04:00
|
|
|
img.add_previous_sibling(img['title'] || "emoji")
|
|
|
|
img.remove
|
|
|
|
end
|
2014-09-13 01:26:31 -04:00
|
|
|
end
|
2015-02-26 06:50:56 -05:00
|
|
|
|
2016-01-29 05:13:59 -05:00
|
|
|
@fragment.to_s
|
2014-09-13 01:26:31 -04:00
|
|
|
end
|
|
|
|
|
2016-05-21 09:17:54 -04:00
|
|
|
def make_all_links_absolute
|
|
|
|
site_uri = URI(Discourse.base_url)
|
|
|
|
@fragment.css("a").each do |link|
|
|
|
|
begin
|
|
|
|
link["href"] = "#{site_uri}#{link['href']}" unless URI(link["href"].to_s).host.present?
|
2018-08-14 06:23:32 -04:00
|
|
|
rescue URI::Error
|
2016-05-21 09:17:54 -04:00
|
|
|
# leave it
|
|
|
|
end
|
|
|
|
end
|
|
|
|
end
|
|
|
|
|
2013-07-26 03:27:46 -04:00
|
|
|
private
|
2013-06-10 15:33:37 -04:00
|
|
|
|
2014-06-13 17:11:04 -04:00
|
|
|
def replace_relative_urls
|
|
|
|
forum_uri = URI(Discourse.base_url)
|
|
|
|
host = forum_uri.host
|
|
|
|
scheme = forum_uri.scheme
|
|
|
|
|
2016-01-29 05:13:59 -05:00
|
|
|
@fragment.css('[href]').each do |element|
|
2014-06-13 17:11:04 -04:00
|
|
|
href = element['href']
|
2017-05-03 00:08:14 -04:00
|
|
|
if href.start_with?("\/\/#{host}")
|
2014-06-13 17:11:04 -04:00
|
|
|
element['href'] = "#{scheme}:#{href}"
|
|
|
|
end
|
|
|
|
end
|
|
|
|
end
|
|
|
|
|
2013-07-26 18:08:58 -04:00
|
|
|
def correct_first_body_margin
|
2019-07-30 15:05:08 -04:00
|
|
|
@fragment.css('div.body p').each do |element|
|
2014-06-09 15:28:03 -04:00
|
|
|
element['style'] = "margin-top:0; border: 0;"
|
2013-07-26 18:08:58 -04:00
|
|
|
end
|
|
|
|
end
|
|
|
|
|
2013-07-26 03:27:46 -04:00
|
|
|
def correct_footer_style
|
2016-01-29 05:13:59 -05:00
|
|
|
@fragment.css('.footer').each do |element|
|
2013-07-29 02:00:02 -04:00
|
|
|
element['style'] = "color:#666;"
|
2018-06-11 18:54:39 -04:00
|
|
|
element.css('a').each do |inner|
|
|
|
|
inner['style'] = "color:#666;"
|
|
|
|
end
|
|
|
|
end
|
|
|
|
end
|
|
|
|
|
|
|
|
def correct_footer_style_hilight_first
|
|
|
|
footernum = 0
|
|
|
|
@fragment.css('.footer.hilight').each do |element|
|
2016-01-08 05:14:58 -05:00
|
|
|
linknum = 0
|
2013-07-26 03:27:46 -04:00
|
|
|
element.css('a').each do |inner|
|
2016-01-08 05:14:58 -05:00
|
|
|
# we want the first footer link to be specially highlighted as IMPORTANT
|
2017-07-27 21:20:09 -04:00
|
|
|
if footernum == (0) && linknum == (0)
|
2018-07-16 12:30:37 -04:00
|
|
|
bg_color = SiteSetting.email_accent_bg_color
|
|
|
|
inner['style'] = "background-color: #{bg_color}; color: #{SiteSetting.email_accent_fg_color}; border-top: 4px solid #{bg_color}; border-right: 6px solid #{bg_color}; border-bottom: 4px solid #{bg_color}; border-left: 6px solid #{bg_color}; display: inline-block; font-weight: bold;"
|
2016-01-08 05:14:58 -05:00
|
|
|
end
|
2018-06-11 18:54:39 -04:00
|
|
|
return
|
2013-07-26 03:27:46 -04:00
|
|
|
end
|
2018-06-11 18:54:39 -04:00
|
|
|
return
|
2013-06-10 15:33:37 -04:00
|
|
|
end
|
2013-07-26 03:27:46 -04:00
|
|
|
end
|
2013-06-10 15:33:37 -04:00
|
|
|
|
2013-07-26 03:27:46 -04:00
|
|
|
def strip_classes_and_ids
|
2016-01-29 05:13:59 -05:00
|
|
|
@fragment.css('*').each do |element|
|
2017-05-03 00:08:14 -04:00
|
|
|
element.delete('class'.freeze)
|
|
|
|
element.delete('id'.freeze)
|
2013-06-11 12:27:11 -04:00
|
|
|
end
|
2013-06-13 12:15:05 -04:00
|
|
|
end
|
2013-06-11 12:27:11 -04:00
|
|
|
|
2013-07-26 03:27:46 -04:00
|
|
|
def reset_tables
|
2014-09-25 01:26:23 -04:00
|
|
|
style('table', nil, cellspacing: '0', cellpadding: '0', border: '0')
|
2013-06-10 15:33:37 -04:00
|
|
|
end
|
|
|
|
|
2013-07-26 03:27:46 -04:00
|
|
|
def style(selector, style, attribs = {})
|
2016-01-29 05:13:59 -05:00
|
|
|
@fragment.css(selector).each do |element|
|
2014-05-09 14:39:09 -04:00
|
|
|
add_styles(element, style) if style
|
2017-07-27 21:20:09 -04:00
|
|
|
attribs.each do |k, v|
|
2016-01-29 05:13:59 -05:00
|
|
|
element[k] = v
|
|
|
|
end
|
2013-07-26 03:27:46 -04:00
|
|
|
end
|
|
|
|
end
|
2013-06-10 15:33:37 -04:00
|
|
|
end
|
2013-07-26 03:27:46 -04:00
|
|
|
end
|