diff options
Diffstat (limited to 'lib/rdoc/markup/inline.rb')
| -rw-r--r-- | lib/rdoc/markup/inline.rb | 266 |
1 files changed, 3 insertions, 263 deletions
diff --git a/lib/rdoc/markup/inline.rb b/lib/rdoc/markup/inline.rb index 418f254998..ee77679a11 100644 --- a/lib/rdoc/markup/inline.rb +++ b/lib/rdoc/markup/inline.rb @@ -39,12 +39,12 @@ class RDoc::Markup end end + AttrChanger = Struct.new(:turn_on, :turn_off) + ## # An AttrChanger records a change in attributes. It contains a bitmap of the # attributes to turn on, and a bitmap of those to turn off. - AttrChanger = Struct.new(:turn_on, :turn_off) - class AttrChanger def to_s "Attr: +#{Attribute.as_string(@turn_on)}/-#{Attribute.as_string(@turn_on)}" @@ -96,266 +96,6 @@ class RDoc::Markup end - class AttributeManager - - NULL = "\000".freeze - - ## - # We work by substituting non-printing characters in to the text. For now - # I'm assuming that I can substitute a character in the range 0..8 for a 7 - # bit character without damaging the encoded string, but this might be - # optimistic - - A_PROTECT = 004 - PROTECT_ATTR = A_PROTECT.chr - - ## - # This maps delimiters that occur around words (such as *bold* or +tt+) - # where the start and end delimiters and the same. This lets us optimize - # the regexp - - MATCHING_WORD_PAIRS = {} - - ## - # And this is used when the delimiters aren't the same. In this case the - # hash maps a pattern to the attribute character - - WORD_PAIR_MAP = {} - - ## - # This maps HTML tags to the corresponding attribute char - - HTML_TAGS = {} - - ## - # And this maps _special_ sequences to a name. A special sequence is - # something like a WikiWord - - SPECIAL = {} - - ## - # Return an attribute object with the given turn_on and turn_off bits set - - def attribute(turn_on, turn_off) - AttrChanger.new(turn_on, turn_off) - end - - def change_attribute(current, new) - diff = current ^ new - attribute(new & diff, current & diff) - end - - def changed_attribute_by_name(current_set, new_set) - current = new = 0 - current_set.each {|name| current |= Attribute.bitmap_for(name) } - new_set.each {|name| new |= Attribute.bitmap_for(name) } - change_attribute(current, new) - end - - def copy_string(start_pos, end_pos) - res = @str[start_pos...end_pos] - res.gsub!(/\000/, '') - res - end - - ## - # Map attributes like <b>text</b>to the sequence - # \001\002<char>\001\003<char>, where <char> is a per-attribute specific - # character - - def convert_attrs(str, attrs) - # first do matching ones - tags = MATCHING_WORD_PAIRS.keys.join("") - - re = /(^|\W)([#{tags}])([#\\]?[\w.\/]+?\S?)\2(\W|$)/ - - 1 while str.gsub!(re) do - attr = MATCHING_WORD_PAIRS[$2] - attrs.set_attrs($`.length + $1.length + $2.length, $3.length, attr) - $1 + NULL * $2.length + $3 + NULL * $2.length + $4 - end - - # then non-matching - unless WORD_PAIR_MAP.empty? then - WORD_PAIR_MAP.each do |regexp, attr| - str.gsub!(regexp) { - attrs.set_attrs($`.length + $1.length, $2.length, attr) - NULL * $1.length + $2 + NULL * $3.length - } - end - end - end - - def convert_html(str, attrs) - tags = HTML_TAGS.keys.join '|' - - 1 while str.gsub!(/<(#{tags})>(.*?)<\/\1>/i) { - attr = HTML_TAGS[$1.downcase] - html_length = $1.length + 2 - seq = NULL * html_length - attrs.set_attrs($`.length + html_length, $2.length, attr) - seq + $2 + seq + NULL - } - end - - def convert_specials(str, attrs) - unless SPECIAL.empty? - SPECIAL.each do |regexp, attr| - str.scan(regexp) do - attrs.set_attrs($`.length, $&.length, attr | Attribute::SPECIAL) - end - end - end - end - - ## - # A \ in front of a character that would normally be processed turns off - # processing. We do this by turning \< into <#{PROTECT} - - PROTECTABLE = %w[<\\] - - def mask_protected_sequences - protect_pattern = Regexp.new("\\\\([#{Regexp.escape(PROTECTABLE.join(''))}])") - @str.gsub!(protect_pattern, "\\1#{PROTECT_ATTR}") - end - - def unmask_protected_sequences - @str.gsub!(/(.)#{PROTECT_ATTR}/, "\\1\000") - end - - def initialize - add_word_pair("*", "*", :BOLD) - add_word_pair("_", "_", :EM) - add_word_pair("+", "+", :TT) - - add_html("em", :EM) - add_html("i", :EM) - add_html("b", :BOLD) - add_html("tt", :TT) - add_html("code", :TT) - - add_special(/<!--(.*?)-->/, :COMMENT) - end - - def add_word_pair(start, stop, name) - raise "Word flags may not start '<'" if start[0] == ?< - bitmap = Attribute.bitmap_for(name) - if start == stop - MATCHING_WORD_PAIRS[start] = bitmap - else - pattern = Regexp.new("(" + Regexp.escape(start) + ")" + -# "([A-Za-z]+)" + - "(\\S+)" + - "(" + Regexp.escape(stop) +")") - WORD_PAIR_MAP[pattern] = bitmap - end - PROTECTABLE << start[0,1] - PROTECTABLE.uniq! - end - - def add_html(tag, name) - HTML_TAGS[tag.downcase] = Attribute.bitmap_for(name) - end - - def add_special(pattern, name) - SPECIAL[pattern] = Attribute.bitmap_for(name) - end - - def flow(str) - @str = str - - puts("Before flow, str='#{@str.dump}'") if $DEBUG_RDOC - mask_protected_sequences - - @attrs = AttrSpan.new(@str.length) - - puts("After protecting, str='#{@str.dump}'") if $DEBUG_RDOC - - convert_attrs(@str, @attrs) - convert_html(@str, @attrs) - convert_specials(str, @attrs) - - unmask_protected_sequences - - puts("After flow, str='#{@str.dump}'") if $DEBUG_RDOC - - return split_into_flow - end - - def display_attributes - puts - puts @str.tr(NULL, "!") - bit = 1 - 16.times do |bno| - line = "" - @str.length.times do |i| - if (@attrs[i] & bit) == 0 - line << " " - else - if bno.zero? - line << "S" - else - line << ("%d" % (bno+1)) - end - end - end - puts(line) unless line =~ /^ *$/ - bit <<= 1 - end - end - - def split_into_flow - display_attributes if $DEBUG_RDOC - - res = [] - current_attr = 0 - str = "" - - str_len = @str.length - - # skip leading invisible text - i = 0 - i += 1 while i < str_len and @str[i] == "\0" - start_pos = i - - # then scan the string, chunking it on attribute changes - while i < str_len - new_attr = @attrs[i] - if new_attr != current_attr - if i > start_pos - res << copy_string(start_pos, i) - start_pos = i - end - - res << change_attribute(current_attr, new_attr) - current_attr = new_attr - - if (current_attr & Attribute::SPECIAL) != 0 - i += 1 while i < str_len and (@attrs[i] & Attribute::SPECIAL) != 0 - res << Special.new(current_attr, copy_string(start_pos, i)) - start_pos = i - next - end - end - - # move on, skipping any invisible characters - begin - i += 1 - end while i < str_len and @str[i] == "\0" - end - - # tidy up trailing text - if start_pos < str_len - res << copy_string(start_pos, str_len) - end - - # and reset to all attributes off - res << change_attribute(current_attr, 0) if current_attr != 0 - - return res - end - - end - end +require 'rdoc/markup/attribute_manager' |