класс ActionText::Content
Action Text Content
Класс ActionText::Content оборачивает фрагмент HTML, добавляя поддержку его разбора, отображения и сериализации. Его можно использовать для извлечения ссылок и вложений, преобразования фрагмента в обычный текст или сериализации фрагмента в базу данных.
Запись ActionText::RichText сериализует атрибут body как ActionText::Content.
class Message < ActiveRecord::Base has_rich_text :content end message = Message.create!(content: "<h1>Funny times!</h1>") body = message.content.body # => #<ActionText::Content "<div class=\"trix-conte..."> body.to_s # => "<h1>Funny times!</h1>" body.to_plain_text # => "Funny times!"
Атрибуты
Открытые методы класса
# File actiontext/lib/action_text/content.rb, line 33 def fragment_by_canonicalizing_content(content) fragment = ActionText::Attachment.fragment_by_canonicalizing_attachments(content) fragment = ActionText::AttachmentGallery.fragment_by_canonicalizing_attachment_galleries(fragment) fragment end
# File actiontext/lib/action_text/content.rb, line 40
def initialize(content = nil, options = {})
options.with_defaults! canonicalize: true
if options[:canonicalize]
@fragment = self.class.fragment_by_canonicalizing_content(content)
else
@fragment = ActionText::Fragment.wrap(content)
end
end Открытые методы экземпляра
# File actiontext/lib/action_text/content.rb, line 170
def ==(other)
if self.class == other.class
to_html == other.to_html
elsif other.is_a?(self.class)
to_s == other.to_s
end
end # File actiontext/lib/action_text/content.rb, line 93
def append_attachables(attachables)
attachments = ActionText::Attachment.from_attachables(attachables)
self.class.new([self.to_s.presence, *attachments].compact.join("\n"))
end # File actiontext/lib/action_text/content.rb, line 162 def as_json(*) to_html end
# File actiontext/lib/action_text/content.rb, line 87
def attachables
@attachables ||= attachment_nodes.map do |node|
ActionText::Attachable.from_node(node)
end
end Извлекает объекты ActionText::Attachable из фрагмента HTML:
attachable = ActiveStorage::Blob.first
html = %Q(<action-text-attachment sgid="#{attachable.attachable_sgid}" caption="Captioned"></action-text-attachment>)
content = ActionText::Content.new(html)
content.attachables # => [attachable]
# File actiontext/lib/action_text/content.rb, line 71
def attachment_galleries
@attachment_galleries ||= attachment_gallery_nodes.map do |node|
attachment_gallery_for_node(node)
end
end # File actiontext/lib/action_text/content.rb, line 65
def attachments
@attachments ||= attachment_nodes.map do |node|
attachment_for_node(node)
end
end Извлекает объекты ActionText::Attachment из фрагмента HTML:
attachable = ActiveStorage::Blob.first
html = %Q(<action-text-attachment sgid="#{attachable.attachable_sgid}" caption="Captioned"></action-text-attachment>)
content = ActionText::Content.new(html)
content.attachments # => [#<ActionText::Attachment attachable=#<ActiveStorage::Blob...
# File actiontext/lib/action_text/content.rb, line 77 def gallery_attachments @gallery_attachments ||= attachment_galleries.flat_map(&:attachments) end
# File actiontext/lib/action_text/content.rb, line 166
def inspect
"#<#{self.class.name} #{to_html.truncate(25).inspect}>"
end # File actiontext/lib/action_text/content.rb, line 55
def links
@links ||= fragment.find_all("a[href]").map { |a| a["href"] }.uniq
end Извлекает ссылки из фрагмента HTML:
html = '<a href="http://example.com/">Example</a>' content = ActionText::Content.new(html) content.links # => ["http://example.com/"]
# File actiontext/lib/action_text/content.rb, line 109
def render_attachment_galleries(&block)
content = ActionText::AttachmentGallery.fragment_by_replacing_attachment_gallery_nodes(fragment) do |node|
block.call(attachment_gallery_for_node(node))
end
self.class.new(content, canonicalize: false)
end # File actiontext/lib/action_text/content.rb, line 98
def render_attachments(**options, &block)
content = fragment.replace(ActionText::Attachment.tag_name) do |node|
if node.key?("content")
sanitized_content = sanitize_content_attachment(node.remove_attribute("content").to_s)
node["content"] = sanitized_content if sanitized_content.present?
end
block.call(attachment_for_node(node, **options))
end
self.class.new(content, canonicalize: false)
end # File actiontext/lib/action_text/content.rb, line 139 def to_html fragment.to_html end
# File actiontext/lib/action_text/content.rb, line 147 def to_partial_path "action_text/contents/content" end
# File actiontext/lib/action_text/content.rb, line 131 def to_plain_text render_attachments(with_full_attributes: false, &:to_plain_text).fragment.to_plain_text end
Возвращает версию разметки, содержащейся в содержимом, в виде обычного текста: теги удаляются, а HTML-сущности кодируются.
content = ActionText::Content.new("<h1>Funny times!</h1>")
content.to_plain_text # => "Funny times!"
content = ActionText::Content.new("<div onclick='action()'>safe<script>unsafe</script></div>")
content.to_plain_text # => "safeunsafe"
ПРИМЕЧАНИЕ: возвращаемая строка не является безопасной для HTML и не должна отображаться в браузерах без дополнительной очистки.
content = ActionText::Content.new("<script>alert()</script>")
content.to_plain_text # => "<script>alert()</script>"
ActionText::ContentHelper.sanitizer.sanitize(content.to_plain_text) # => ""
# File actiontext/lib/action_text/content.rb, line 143
def to_rendered_html_with_layout
render layout: "action_text/contents/content", partial: to_partial_path, formats: :html, locals: { content: self }
end # File actiontext/lib/action_text/content.rb, line 158 def to_s to_rendered_html_with_layout end
Безопасно преобразует Content в HTML-String.
content = ActionText::Content.new(content: "<h1>Funny times!</h1>")
content.to_s # => "<h1>Funny times!</h1>"
content = ActionText::Content.new("<div onclick='action()'>safe<script>unsafe</script></div>")
content.to_s # => "<div>safeunsafe</div>"
# File actiontext/lib/action_text/content.rb, line 135 def to_trix_html render_attachments(&:to_trix_attachment).to_html end
© 2004–2021 David Heinemeier Hansson
Licensed under the MIT License.