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Diffstat (limited to 'ruby_1_8_6/lib/rdoc/markup/simple_markup.rb')
| -rw-r--r-- | ruby_1_8_6/lib/rdoc/markup/simple_markup.rb | 476 |
1 files changed, 0 insertions, 476 deletions
diff --git a/ruby_1_8_6/lib/rdoc/markup/simple_markup.rb b/ruby_1_8_6/lib/rdoc/markup/simple_markup.rb deleted file mode 100644 index 8193ca02d4..0000000000 --- a/ruby_1_8_6/lib/rdoc/markup/simple_markup.rb +++ /dev/null @@ -1,476 +0,0 @@ -# = Introduction -# -# SimpleMarkup parses plain text documents and attempts to decompose -# them into their constituent parts. Some of these parts are high-level: -# paragraphs, chunks of verbatim text, list entries and the like. Other -# parts happen at the character level: a piece of bold text, a word in -# code font. This markup is similar in spirit to that used on WikiWiki -# webs, where folks create web pages using a simple set of formatting -# rules. -# -# SimpleMarkup itself does no output formatting: this is left to a -# different set of classes. -# -# SimpleMarkup is extendable at runtime: you can add new markup -# elements to be recognised in the documents that SimpleMarkup parses. -# -# SimpleMarkup is intended to be the basis for a family of tools which -# share the common requirement that simple, plain-text should be -# rendered in a variety of different output formats and media. It is -# envisaged that SimpleMarkup could be the basis for formating RDoc -# style comment blocks, Wiki entries, and online FAQs. -# -# = Basic Formatting -# -# * SimpleMarkup looks for a document's natural left margin. This is -# used as the initial margin for the document. -# -# * Consecutive lines starting at this margin are considered to be a -# paragraph. -# -# * If a paragraph starts with a "*", "-", or with "<digit>.", then it is -# taken to be the start of a list. The margin in increased to be the -# first non-space following the list start flag. Subsequent lines -# should be indented to this new margin until the list ends. For -# example: -# -# * this is a list with three paragraphs in -# the first item. This is the first paragraph. -# -# And this is the second paragraph. -# -# 1. This is an indented, numbered list. -# 2. This is the second item in that list -# -# This is the third conventional paragraph in the -# first list item. -# -# * This is the second item in the original list -# -# * You can also construct labeled lists, sometimes called description -# or definition lists. Do this by putting the label in square brackets -# and indenting the list body: -# -# [cat] a small furry mammal -# that seems to sleep a lot -# -# [ant] a little insect that is known -# to enjoy picnics -# -# A minor variation on labeled lists uses two colons to separate the -# label from the list body: -# -# cat:: a small furry mammal -# that seems to sleep a lot -# -# ant:: a little insect that is known -# to enjoy picnics -# -# This latter style guarantees that the list bodies' left margins are -# aligned: think of them as a two column table. -# -# * Any line that starts to the right of the current margin is treated -# as verbatim text. This is useful for code listings. The example of a -# list above is also verbatim text. -# -# * A line starting with an equals sign (=) is treated as a -# heading. Level one headings have one equals sign, level two headings -# have two,and so on. -# -# * A line starting with three or more hyphens (at the current indent) -# generates a horizontal rule. THe more hyphens, the thicker the rule -# (within reason, and if supported by the output device) -# -# * You can use markup within text (except verbatim) to change the -# appearance of parts of that text. Out of the box, SimpleMarkup -# supports word-based and general markup. -# -# Word-based markup uses flag characters around individual words: -# -# [\*word*] displays word in a *bold* font -# [\_word_] displays word in an _emphasized_ font -# [\+word+] displays word in a +code+ font -# -# General markup affects text between a start delimiter and and end -# delimiter. Not surprisingly, these delimiters look like HTML markup. -# -# [\<b>text...</b>] displays word in a *bold* font -# [\<em>text...</em>] displays word in an _emphasized_ font -# [\<i>text...</i>] displays word in an _emphasized_ font -# [\<tt>text...</tt>] displays word in a +code+ font -# -# Unlike conventional Wiki markup, general markup can cross line -# boundaries. You can turn off the interpretation of markup by -# preceding the first character with a backslash, so \\\<b>bold -# text</b> and \\\*bold* produce \<b>bold text</b> and \*bold -# respectively. -# -# = Using SimpleMarkup -# -# For information on using SimpleMarkup programatically, -# see SM::SimpleMarkup. -# -# Author:: Dave Thomas, dave@pragmaticprogrammer.com -# Version:: 0.0 -# License:: Ruby license - - - -require 'rdoc/markup/simple_markup/fragments' -require 'rdoc/markup/simple_markup/lines.rb' - -module SM #:nodoc: - - # == Synopsis - # - # This code converts <tt>input_string</tt>, which is in the format - # described in markup/simple_markup.rb, to HTML. The conversion - # takes place in the +convert+ method, so you can use the same - # SimpleMarkup object to convert multiple input strings. - # - # require 'rdoc/markup/simple_markup' - # require 'rdoc/markup/simple_markup/to_html' - # - # p = SM::SimpleMarkup.new - # h = SM::ToHtml.new - # - # puts p.convert(input_string, h) - # - # You can extend the SimpleMarkup parser to recognise new markup - # sequences, and to add special processing for text that matches a - # regular epxression. Here we make WikiWords significant to the parser, - # and also make the sequences {word} and \<no>text...</no> signify - # strike-through text. When then subclass the HTML output class to deal - # with these: - # - # require 'rdoc/markup/simple_markup' - # require 'rdoc/markup/simple_markup/to_html' - # - # class WikiHtml < SM::ToHtml - # def handle_special_WIKIWORD(special) - # "<font color=red>" + special.text + "</font>" - # end - # end - # - # p = SM::SimpleMarkup.new - # p.add_word_pair("{", "}", :STRIKE) - # p.add_html("no", :STRIKE) - # - # p.add_special(/\b([A-Z][a-z]+[A-Z]\w+)/, :WIKIWORD) - # - # h = WikiHtml.new - # h.add_tag(:STRIKE, "<strike>", "</strike>") - # - # puts "<body>" + p.convert(ARGF.read, h) + "</body>" - # - # == Output Formatters - # - # _missing_ - # - # - - class SimpleMarkup - - SPACE = ?\s - - # List entries look like: - # * text - # 1. text - # [label] text - # label:: text - # - # Flag it as a list entry, and - # work out the indent for subsequent lines - - SIMPLE_LIST_RE = /^( - ( \* (?# bullet) - |- (?# bullet) - |\d+\. (?# numbered ) - |[A-Za-z]\. (?# alphabetically numbered ) - ) - \s+ - )\S/x - - LABEL_LIST_RE = /^( - ( \[.*?\] (?# labeled ) - |\S.*:: (?# note ) - )(?:\s+|$) - )/x - - - ## - # take a block of text and use various heuristics to determine - # it's structure (paragraphs, lists, and so on). Invoke an - # event handler as we identify significant chunks. - # - - def initialize - @am = AttributeManager.new - @output = nil - end - - ## - # Add to the sequences used to add formatting to an individual word - # (such as *bold*). Matching entries will generate attibutes - # that the output formatters can recognize by their +name+ - - def add_word_pair(start, stop, name) - @am.add_word_pair(start, stop, name) - end - - ## - # Add to the sequences recognized as general markup - # - - def add_html(tag, name) - @am.add_html(tag, name) - end - - ## - # Add to other inline sequences. For example, we could add - # WikiWords using something like: - # - # parser.add_special(/\b([A-Z][a-z]+[A-Z]\w+)/, :WIKIWORD) - # - # Each wiki word will be presented to the output formatter - # via the accept_special method - # - - def add_special(pattern, name) - @am.add_special(pattern, name) - end - - - # We take a string, split it into lines, work out the type of - # each line, and from there deduce groups of lines (for example - # all lines in a paragraph). We then invoke the output formatter - # using a Visitor to display the result - - def convert(str, op) - @lines = Lines.new(str.split(/\r?\n/).collect { |aLine| - Line.new(aLine) }) - return "" if @lines.empty? - @lines.normalize - assign_types_to_lines - group = group_lines - # call the output formatter to handle the result - # group.to_a.each {|i| p i} - group.accept(@am, op) - end - - - ####### - private - ####### - - - ## - # Look through the text at line indentation. We flag each line as being - # Blank, a paragraph, a list element, or verbatim text - # - - def assign_types_to_lines(margin = 0, level = 0) - - while line = @lines.next - if line.isBlank? - line.stamp(Line::BLANK, level) - next - end - - # if a line contains non-blanks before the margin, then it must belong - # to an outer level - - text = line.text - - for i in 0...margin - if text[i] != SPACE - @lines.unget - return - end - end - - active_line = text[margin..-1] - - # Rules (horizontal lines) look like - # - # --- (three or more hyphens) - # - # The more hyphens, the thicker the rule - # - - if /^(---+)\s*$/ =~ active_line - line.stamp(Line::RULE, level, $1.length-2) - next - end - - # Then look for list entries. First the ones that have to have - # text following them (* xxx, - xxx, and dd. xxx) - - if SIMPLE_LIST_RE =~ active_line - - offset = margin + $1.length - prefix = $2 - prefix_length = prefix.length - - flag = case prefix - when "*","-" then ListBase::BULLET - when /^\d/ then ListBase::NUMBER - when /^[A-Z]/ then ListBase::UPPERALPHA - when /^[a-z]/ then ListBase::LOWERALPHA - else raise "Invalid List Type: #{self.inspect}" - end - - line.stamp(Line::LIST, level+1, prefix, flag) - text[margin, prefix_length] = " " * prefix_length - assign_types_to_lines(offset, level + 1) - next - end - - - if LABEL_LIST_RE =~ active_line - offset = margin + $1.length - prefix = $2 - prefix_length = prefix.length - - next if handled_labeled_list(line, level, margin, offset, prefix) - end - - # Headings look like - # = Main heading - # == Second level - # === Third - # - # Headings reset the level to 0 - - if active_line[0] == ?= and active_line =~ /^(=+)\s*(.*)/ - prefix_length = $1.length - prefix_length = 6 if prefix_length > 6 - line.stamp(Line::HEADING, 0, prefix_length) - line.strip_leading(margin + prefix_length) - next - end - - # If the character's a space, then we have verbatim text, - # otherwise - - if active_line[0] == SPACE - line.strip_leading(margin) if margin > 0 - line.stamp(Line::VERBATIM, level) - else - line.stamp(Line::PARAGRAPH, level) - end - end - end - - # Handle labeled list entries, We have a special case - # to deal with. Because the labels can be long, they force - # the remaining block of text over the to right: - # - # this is a long label that I wrote:: and here is the - # block of text with - # a silly margin - # - # So we allow the special case. If the label is followed - # by nothing, and if the following line is indented, then - # we take the indent of that line as the new margin - # - # this is a long label that I wrote:: - # here is a more reasonably indented block which - # will ab attached to the label. - # - - def handled_labeled_list(line, level, margin, offset, prefix) - prefix_length = prefix.length - text = line.text - flag = nil - case prefix - when /^\[/ - flag = ListBase::LABELED - prefix = prefix[1, prefix.length-2] - when /:$/ - flag = ListBase::NOTE - prefix.chop! - else raise "Invalid List Type: #{self.inspect}" - end - - # body is on the next line - - if text.length <= offset - original_line = line - line = @lines.next - return(false) unless line - text = line.text - - for i in 0..margin - if text[i] != SPACE - @lines.unget - return false - end - end - i = margin - i += 1 while text[i] == SPACE - if i >= text.length - @lines.unget - return false - else - offset = i - prefix_length = 0 - @lines.delete(original_line) - end - end - - line.stamp(Line::LIST, level+1, prefix, flag) - text[margin, prefix_length] = " " * prefix_length - assign_types_to_lines(offset, level + 1) - return true - end - - # Return a block consisting of fragments which are - # paragraphs, list entries or verbatim text. We merge consecutive - # lines of the same type and level together. We are also slightly - # tricky with lists: the lines following a list introduction - # look like paragraph lines at the next level, and we remap them - # into list entries instead - - def group_lines - @lines.rewind - - inList = false - wantedType = wantedLevel = nil - - block = LineCollection.new - group = nil - - while line = @lines.next - if line.level == wantedLevel and line.type == wantedType - group.add_text(line.text) - else - group = block.fragment_for(line) - block.add(group) - if line.type == Line::LIST - wantedType = Line::PARAGRAPH - else - wantedType = line.type - end - wantedLevel = line.type == Line::HEADING ? line.param : line.level - end - end - - block.normalize - block - end - - ## for debugging, we allow access to our line contents as text - def content - @lines.as_text - end - public :content - - ## for debugging, return the list of line types - def get_line_types - @lines.line_types - end - public :get_line_types - end - -end |