265 lines
9.2 KiB
Ruby
265 lines
9.2 KiB
Ruby
#
|
|
# HTML emails don't support CSS, so we can use nokogiri to inline attributes based on
|
|
# matchers.
|
|
#
|
|
module Email
|
|
class Styles
|
|
@@plugin_callbacks = []
|
|
|
|
attr_accessor :fragment
|
|
|
|
delegate :css, to: :fragment
|
|
|
|
def initialize(html, opts=nil)
|
|
@html = html
|
|
@opts = opts || {}
|
|
@fragment = Nokogiri::HTML.fragment(@html)
|
|
end
|
|
|
|
def self.register_plugin_style(&block)
|
|
@@plugin_callbacks.push(block)
|
|
end
|
|
|
|
def add_styles(node, new_styles)
|
|
existing = node['style']
|
|
if existing.present?
|
|
# merge styles
|
|
node['style'] = "#{new_styles}; #{existing}"
|
|
else
|
|
node['style'] = new_styles
|
|
end
|
|
end
|
|
|
|
def format_basic
|
|
uri = URI(Discourse.base_url)
|
|
|
|
# images
|
|
@fragment.css('img').each do |img|
|
|
next if img['class'] == 'site-logo'
|
|
|
|
if img['class'] == "emoji" || img['src'] =~ /(plugins|images)\/emoji/
|
|
img['width'] = 20
|
|
img['height'] = 20
|
|
else
|
|
# use dimensions of original iPhone screen for 'too big, let device rescale'
|
|
if img['width'].to_i > 320 or img['height'].to_i > 480
|
|
img['width'] = 'auto'
|
|
img['height'] = 'auto'
|
|
end
|
|
end
|
|
|
|
# ensure all urls are absolute
|
|
if img['src'] =~ /^\/[^\/]/
|
|
img['src'] = "#{Discourse.base_url}#{img['src']}"
|
|
end
|
|
|
|
# ensure no schemaless urls
|
|
if img['src'] && img['src'].starts_with?("//")
|
|
img['src'] = "#{uri.scheme}:#{img['src']}"
|
|
end
|
|
end
|
|
|
|
# add max-width to big images
|
|
big_images = @fragment.css('img[width="auto"][height="auto"]') -
|
|
@fragment.css('aside.onebox img') -
|
|
@fragment.css('img.site-logo, img.emoji')
|
|
big_images.each do |img|
|
|
add_styles(img, 'max-width: 100%;') if img['style'] !~ /max-width/
|
|
end
|
|
|
|
# attachments
|
|
@fragment.css('a.attachment').each do |a|
|
|
# ensure all urls are absolute
|
|
if a['href'] =~ /^\/[^\/]/
|
|
a['href'] = "#{Discourse.base_url}#{a['href']}"
|
|
end
|
|
|
|
# ensure no schemaless urls
|
|
if a['href'] && a['href'].starts_with?("//")
|
|
a['href'] = "#{uri.scheme}:#{a['href']}"
|
|
end
|
|
end
|
|
end
|
|
|
|
def format_notification
|
|
style('.previous-discussion', 'font-size: 17px; color: #444;')
|
|
style('.notification-date', "text-align:right;color:#999999;padding-right:5px;font-family:'lucida grande',tahoma,verdana,arial,sans-serif;font-size:11px")
|
|
style('.username', "font-size:13px;font-family:'lucida grande',tahoma,verdana,arial,sans-serif;color:#3b5998;text-decoration:none;font-weight:bold")
|
|
style('.user-title', "font-size:13px;font-family:'lucida grande',tahoma,verdana,arial,sans-serif;text-decoration:none;margin-left:7px;color: #999;")
|
|
style('.user-name', "font-size:13px;font-family:'lucida grande',tahoma,verdana,arial,sans-serif;text-decoration:none;margin-left:7px;color: #3b5998;font-weight:normal;")
|
|
style('.post-wrapper', "margin-bottom:25px;")
|
|
style('.user-avatar', 'vertical-align:top;width:55px;')
|
|
style('.user-avatar img', nil, width: '45', height: '45')
|
|
style('hr', 'background-color: #ddd; height: 1px; border: 1px;')
|
|
style('.rtl', 'direction: rtl;')
|
|
style('td.body', 'padding-top:5px;', colspan: "2")
|
|
style('.whisper td.body', 'font-style: italic; color: #9c9c9c;')
|
|
style('.lightbox-wrapper .meta', 'display: none')
|
|
correct_first_body_margin
|
|
correct_footer_style
|
|
reset_tables
|
|
onebox_styles
|
|
plugin_styles
|
|
end
|
|
|
|
def onebox_styles
|
|
# Links to other topics
|
|
style('aside.quote', 'border-left: 5px solid #e9e9e9; background-color: #f8f8f8; padding: 12px 25px 2px 12px; margin-bottom: 10px;')
|
|
style('aside.quote blockquote', 'border: 0px; padding: 0; margin: 7px 0; background-color: clear;')
|
|
style('aside.quote blockquote > p', 'padding: 0;')
|
|
style('aside.quote div.info-line', 'color: #666; margin: 10px 0')
|
|
style('aside.quote .avatar', 'margin-right: 5px; width:20px; height:20px')
|
|
|
|
style('blockquote', 'border-left: 5px solid #e9e9e9; background-color: #f8f8f8; margin: 0;')
|
|
style('blockquote > p', 'padding: 1em;')
|
|
|
|
# Oneboxes
|
|
style('aside.onebox', "padding: 12px 25px 2px 12px; border-left: 5px solid #bebebe; background: #eee; margin-bottom: 10px;")
|
|
style('aside.onebox img', "max-height: 80%; max-width: 25%; height: auto; float: left; margin-right: 10px; margin-bottom: 10px")
|
|
style('aside.onebox h3', "border-bottom: 0")
|
|
style('aside.onebox .source', "margin-bottom: 8px")
|
|
style('aside.onebox .source a[href]', "color: #333; font-weight: normal")
|
|
style('aside.clearfix', "clear: both")
|
|
|
|
# Finally, convert all `aside` tags to `div`s
|
|
@fragment.css('aside, article, header').each do |n|
|
|
n.name = "div"
|
|
end
|
|
|
|
# iframes can't go in emails, so replace them with clickable links
|
|
@fragment.css('iframe').each do |i|
|
|
begin
|
|
src_uri = URI(i['src'])
|
|
|
|
# If an iframe is protocol relative, use SSL when displaying it
|
|
display_src = "#{src_uri.scheme || 'https://'}#{src_uri.host}#{src_uri.path}"
|
|
i.replace "<p><a href='#{src_uri.to_s}'>#{display_src}</a><p>"
|
|
rescue URI::InvalidURIError
|
|
# If the URL is weird, remove it
|
|
i.remove
|
|
end
|
|
end
|
|
end
|
|
|
|
def format_html
|
|
style('h4', 'color: #222;')
|
|
style('h3', 'margin: 15px 0 20px 0;')
|
|
style('hr', 'background-color: #ddd; height: 1px; border: 1px;')
|
|
style('a', 'text-decoration: none; font-weight: bold; color: #006699;')
|
|
style('ul', 'margin: 0 0 0 10px; padding: 0 0 0 20px;')
|
|
style('li', 'padding-bottom: 10px')
|
|
style('div.digest-post', 'margin-left: 15px; margin-top: -5px; max-width: 694px;')
|
|
style('div.digest-post h1', 'font-size: 20px;')
|
|
style('div.footer', 'color:#666; font-size:95%; text-align:center; padding-top:15px;')
|
|
style('span.post-count', 'margin: 0 5px; color: #777;')
|
|
style('pre', 'word-wrap: break-word; max-width: 694px;')
|
|
style('code', 'background-color: #f1f1ff; padding: 2px 5px;')
|
|
style('pre code', 'display: block; background-color: #f1f1ff; padding: 5px;')
|
|
style('.featured-topic a', 'text-decoration: none; font-weight: bold; color: #006699; line-height:1.5em;')
|
|
|
|
onebox_styles
|
|
plugin_styles
|
|
end
|
|
|
|
# this method is reserved for styles specific to plugin
|
|
def plugin_styles
|
|
@@plugin_callbacks.each { |block| block.call(@fragment, @opts) }
|
|
end
|
|
|
|
def to_html
|
|
strip_classes_and_ids
|
|
replace_relative_urls
|
|
@fragment.to_html.tap do |result|
|
|
result.gsub!(/\[email-indent\]/, "<div style='margin-left: 15px'>")
|
|
result.gsub!(/\[\/email-indent\]/, "</div>")
|
|
end
|
|
end
|
|
|
|
def strip_avatars_and_emojis
|
|
@fragment.search('img').each do |img|
|
|
if img['src'] =~ /_avatar/
|
|
img.parent['style'] = "vertical-align: top;" if img.parent.name == 'td'
|
|
img.remove
|
|
end
|
|
|
|
if img['title'] && (img['src'] =~ /images\/emoji/ || img['src'] =~ /uploads\/default\/_emoji/)
|
|
img.add_previous_sibling(img['title'] || "emoji")
|
|
img.remove
|
|
end
|
|
end
|
|
|
|
@fragment.to_s
|
|
end
|
|
|
|
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?
|
|
rescue URI::InvalidURIError, URI::InvalidComponentError
|
|
# leave it
|
|
end
|
|
end
|
|
end
|
|
|
|
private
|
|
|
|
def replace_relative_urls
|
|
forum_uri = URI(Discourse.base_url)
|
|
host = forum_uri.host
|
|
scheme = forum_uri.scheme
|
|
|
|
@fragment.css('[href]').each do |element|
|
|
href = element['href']
|
|
if href =~ /^\/\/#{host}/
|
|
element['href'] = "#{scheme}:#{href}"
|
|
end
|
|
end
|
|
end
|
|
|
|
def correct_first_body_margin
|
|
@fragment.css('.body p').each do |element|
|
|
element['style'] = "margin-top:0; border: 0;"
|
|
end
|
|
end
|
|
|
|
def correct_footer_style
|
|
footernum = 0
|
|
@fragment.css('.footer').each do |element|
|
|
element['style'] = "color:#666;"
|
|
linknum = 0
|
|
element.css('a').each do |inner|
|
|
# we want the first footer link to be specially highlighted as IMPORTANT
|
|
if footernum == 0 and linknum == 0
|
|
inner['style'] = "background-color: #006699; color:#ffffff; border-top: 4px solid #006699; border-right: 6px solid #006699; border-bottom: 4px solid #006699; border-left: 6px solid #006699; display: inline-block;"
|
|
else
|
|
inner['style'] = "color:#666;"
|
|
end
|
|
linknum += 1
|
|
end
|
|
footernum += 1
|
|
end
|
|
end
|
|
|
|
def strip_classes_and_ids
|
|
@fragment.css('*').each do |element|
|
|
element.delete('class')
|
|
element.delete('id')
|
|
end
|
|
end
|
|
|
|
def reset_tables
|
|
style('table', nil, cellspacing: '0', cellpadding: '0', border: '0')
|
|
end
|
|
|
|
def style(selector, style, attribs = {})
|
|
@fragment.css(selector).each do |element|
|
|
add_styles(element, style) if style
|
|
attribs.each do |k,v|
|
|
element[k] = v
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|