# File lib/texy/dom.rb, line 189
        def initialize(texy)
            super

            # is content HTML-safe?
            @html_safe = false
            @content = ''
        end

# File lib/texy/dom.rb, line 256
            def append_child(child, inner_text = nil)
                self.content_type = [self.content_type, child.content_type].max

                if child.kind_of? InlineTagElement
                    key_open = hash_key(child.content_type, true)
                    key_close = hash_key(child.content_type, false)

                    @children << [key_open, child]
                    @children << [key_close, child]

                    key_open + inner_text + key_close
                else
                    key = hash_key child.content_type
                    @children << [key, child]
                    key
                end
            end

# File lib/texy/dom.rb, line 235
            def parse(text)
                parser = LineParser.new(self)
                parser.parse(text)
            end

# File lib/texy/dom.rb, line 206
        def safe_content(only_return = false)
            safe_content = if @html_safe then content else Html.html_chars(content) end

            if only_return
                safe_content
            else
                @html_safe = true
                @content = safe_content
            end
        end

# File lib/texy/dom.rb, line 201
        def set_content(text, html_safe = false)
            @content = text;
            @html_safe = html_safe
        end

# File lib/texy/dom.rb, line 219
            def generate_content
                set_content(safe_content(true))

                unless @children.empty?
                    @children.each do |(key, child)|
                        child.behave_as_opening = Texy.hash_opening?(key)
                        content.gsub! key, child.to_html
                    end
                end

                content
            end

# File lib/texy/dom.rb, line 245
            def hash_key(content_type = nil, opening = false)
                border = if content_type == CONTENT_NONE then "\x19" else "\x1A" end

                border +
                if opening then "\x1F" else "" end +
                @children.size.to_s(4).tr('0123', "\x1B\x1C\x1D\x1E") +    ## wtf?
                border
            end