Class: RDoc::Markup::ToHtml

Inherits:
Formatter show all
Includes:
Text
Defined in:
lib/rdoc/markup/to_html.rb

Overview

Outputs RDoc markup as HTML.

Direct Known Subclasses

ToHtmlCrossref, ToHtmlSnippet

Constant Summary collapse

LIST_TYPE_TO_HTML =

Maps RDoc::Markup::Parser::LIST_TOKENS types to HTML tags

{
  :BULLET => ['<ul>',                                      '</ul>'],
  :LABEL  => ['<dl class="rdoc-list label-list">',         '</dl>'],
  :LALPHA => ['<ol style="list-style-type: lower-alpha">', '</ol>'],
  :NOTE   => ['<dl class="rdoc-list note-list">',          '</dl>'],
  :NUMBER => ['<ol>',                                      '</ol>'],
  :UALPHA => ['<ol style="list-style-type: upper-alpha">', '</ol>'],
}
URL_CHARACTERS_REGEXP_STR =

:nodoc:

/[A-Za-z0-9\-._~:\/\?#\[\]@!$&'\(\)*+,;%=]/.source

Constants included from Text

Text::MARKUP_FORMAT, Text::SPACE_SEPARATED_LETTER_CLASS, Text::TO_HTML_CHARACTERS

Instance Attribute Summary collapse

Attributes included from Text

#language

Instance Method Summary collapse

Methods included from Text

encode_fallback, #expand_tabs, #flush_left, #markup, #normalize_comment, #parse, #snippet, #strip_hashes, #strip_newlines, #strip_stars, #wrap

Methods inherited from Formatter

#accept_document, #add_regexp_handling_RDOCLINK, #add_regexp_handling_TIDYLINK, #add_tag, #annotate, #convert, #convert_flow, #convert_regexp_handling, #each_attr_tag, gen_relative_url, #ignore, #in_tt?, #off_tags, #on_tags, #parse_url, #tt?, #tt_tag?

Constructor Details

#initialize(options, markup = nil) ⇒ ToHtml

Creates a new formatter that will output HTML



45
46
47
48
49
50
51
52
53
54
55
56
57
58
 
# File 'lib/rdoc/markup/to_html.rb', line 45

def initialize options, markup = nil
  super

  @code_object = nil
  @from_path = ''
  @in_list_entry = nil
  @list = nil
  @th = nil
  @hard_break = "<br>\n"

  init_regexp_handlings

  init_tags
end

Instance Attribute Details

#code_object ⇒ Object

The RDoc::CodeObject HTML is being generated for. This is used to generate namespaced URI fragments



33
34
35
 
# File 'lib/rdoc/markup/to_html.rb', line 33

def code_object
  @code_object
end

#from_path ⇒ Object

Path to this document for relative links



38
39
40
 
# File 'lib/rdoc/markup/to_html.rb', line 38

def from_path
  @from_path
end

#in_list_entry ⇒ Object (readonly)

:nodoc:



26
27
28
 
# File 'lib/rdoc/markup/to_html.rb', line 26

def in_list_entry
  @in_list_entry
end

#list ⇒ Object (readonly)

:nodoc:



27
28
29
 
# File 'lib/rdoc/markup/to_html.rb', line 27

def list
  @list
end

#res ⇒ Object (readonly)

:nodoc:



25
26
27
 
# File 'lib/rdoc/markup/to_html.rb', line 25

def res
  @res
end

Instance Method Details

#accept_blank_line(blank_line) ⇒ Object

Adds blank_line to the output



296
297
298
 
# File 'lib/rdoc/markup/to_html.rb', line 296

def accept_blank_line(blank_line)
  # @res << annotate("<p />") << "\n"
end

#accept_block_quote(block_quote) ⇒ Object

Adds block_quote to the output



195
196
197
198
199
200
201
202
203
 
# File 'lib/rdoc/markup/to_html.rb', line 195

def accept_block_quote block_quote
  @res << "\n<blockquote>"

  block_quote.parts.each do |part|
    part.accept self
  end

  @res << "</blockquote>\n"
end

#accept_heading(heading) ⇒ Object

Adds heading to the output. The headings greater than 6 are trimmed to level 6.



304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
 
# File 'lib/rdoc/markup/to_html.rb', line 304

def accept_heading heading
  level = [6, heading.level].min

  label = heading.label @code_object

  @res << if @options.output_decoration
            "\n<h#{level} id=\"#{label}\">"
          else
            "\n<h#{level}>"
          end
  @res << to_html(heading.text)
  unless @options.pipe then
    @res << "<span><a href=\"##{label}\">&para;</a>"
    @res << " <a href=\"#top\">&uarr;</a></span>"
  end
  @res << "</h#{level}>\n"
end

#accept_list_end(list) ⇒ Object

Finishes consumption of list



267
268
269
270
271
272
273
 
# File 'lib/rdoc/markup/to_html.rb', line 267

def accept_list_end(list)
  @list.pop
  if tag = @in_list_entry.pop
    @res << tag
  end
  @res << html_list_name(list.type, false) << "\n"
end

#accept_list_item_end(list_item) ⇒ Object

Finishes consumption of list_item



289
290
291
 
# File 'lib/rdoc/markup/to_html.rb', line 289

def accept_list_item_end(list_item)
  @in_list_entry[-1] = list_end_for(@list.last)
end

#accept_list_item_start(list_item) ⇒ Object

Prepares the visitor for consuming list_item



278
279
280
281
282
283
284
 
# File 'lib/rdoc/markup/to_html.rb', line 278

def accept_list_item_start(list_item)
  if tag = @in_list_entry.last
    @res << tag
  end

  @res << list_item_start(list_item, @list.last)
end

#accept_list_start(list) ⇒ Object

Prepares the visitor for consuming list



258
259
260
261
262
 
# File 'lib/rdoc/markup/to_html.rb', line 258

def accept_list_start(list)
  @list << list.type
  @res << html_list_name(list.type, true)
  @in_list_entry.push false
end

#accept_paragraph(paragraph) ⇒ Object

Adds paragraph to the output



208
209
210
211
212
213
214
215
216
 
# File 'lib/rdoc/markup/to_html.rb', line 208

def accept_paragraph paragraph
  @res << "\n<p>"
  text = paragraph.text @hard_break
  text = text.gsub(/(#{SPACE_SEPARATED_LETTER_CLASS})?\K\r?\n(?=(?(1)(#{SPACE_SEPARATED_LETTER_CLASS})?))/o) {
    defined?($2) && ' '
  }
  @res << to_html(text)
  @res << "</p>\n"
end

#accept_raw(raw) ⇒ Object

Adds raw to the output



325
326
327
 
# File 'lib/rdoc/markup/to_html.rb', line 325

def accept_raw raw
  @res << raw.parts.join("\n")
end

#accept_rule(rule) ⇒ Object

Adds rule to the output



251
252
253
 
# File 'lib/rdoc/markup/to_html.rb', line 251

def accept_rule rule
  @res << "<hr>\n"
end

#accept_table(header, body, aligns) ⇒ Object

Adds table to the output



332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
 
# File 'lib/rdoc/markup/to_html.rb', line 332

def accept_table header, body, aligns
  @res << "\n<table role=\"table\">\n<thead>\n<tr>\n"
  header.zip(aligns) do |text, align|
    @res << '<th'
    @res << ' align="' << align << '"' if align
    @res << '>' << to_html(text) << "</th>\n"
  end
  @res << "</tr>\n</thead>\n<tbody>\n"
  body.each do |row|
    @res << "<tr>\n"
    row.zip(aligns) do |text, align|
      @res << '<td'
      @res << ' align="' << align << '"' if align
      @res << '>' << to_html(text) << "</td>\n"
    end
    @res << "</tr>\n"
  end
  @res << "</tbody>\n</table>\n"
end

#accept_verbatim(verbatim) ⇒ Object

Adds verbatim to the output



221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
 
# File 'lib/rdoc/markup/to_html.rb', line 221

def accept_verbatim verbatim
  text = verbatim.text.rstrip

  klass = nil

  content = if verbatim.ruby? or parseable? text then
              begin
                tokens = RDoc::Parser::RipperStateLex.parse text
                klass  = ' class="ruby"'

                result = RDoc::TokenStream.to_html tokens
                result = result + "\n" unless "\n" == result[-1]
                result
              rescue
                CGI.escapeHTML text
              end
            else
              CGI.escapeHTML text
            end

  if @options.pipe then
    @res << "\n<pre><code>#{CGI.escapeHTML text}\n</code></pre>\n"
  else
    @res << "\n<pre#{klass}>#{content}</pre>\n"
  end
end

#convert_string(text) ⇒ Object

CGI-escapes text



357
358
359
 
# File 'lib/rdoc/markup/to_html.rb', line 357

def convert_string(text)
  CGI.escapeHTML text
end

#end_accepting ⇒ Object

Returns the generated output



188
189
190
 
# File 'lib/rdoc/markup/to_html.rb', line 188

def end_accepting
  @res.join
end

#gen_url(url, text) ⇒ Object

Generate a link to url with content text. Handles the special cases for img: and link: described under handle_regexp_HYPERLINK



365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
 
# File 'lib/rdoc/markup/to_html.rb', line 365

def gen_url url, text
  scheme, url, id = parse_url url

  if %w[http https link].include?(scheme) and
     url =~ /\.(gif|png|jpg|jpeg|bmp)$/ then
    "<img src=\"#{url}\" />"
  else
    if scheme != 'link' and %r%\A((?!https?:)(?:[^/#]*/)*+)([^/#]+)\.(rb|rdoc|md)(?=\z|#)%i =~ url
      url = "#$1#{$2.tr('.', '_')}_#$3.html#$'"
    end

    text = text.sub %r%^#{scheme}:/*%i, ''
    text = text.sub %r%^[*\^](\d+)$%,   '\1'

    link = "<a#{id} href=\"#{url}\">#{text}</a>"

    link = "<sup>#{link}</sup>" if /"foot/ =~ id

    link
  end
end

#handle_RDOCLINK(url) ⇒ Object

:nodoc:



85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
 
# File 'lib/rdoc/markup/to_html.rb', line 85

def handle_RDOCLINK url # :nodoc:
  case url
  when /^rdoc-ref:/
    CGI.escapeHTML($')
  when /^rdoc-label:/
    text = $'

    text = case text
           when /\Alabel-/    then $'
           when /\Afootmark-/ then $'
           when /\Afoottext-/ then $'
           else                    text
           end

    gen_url CGI.escapeHTML(url), CGI.escapeHTML(text)
  when /^rdoc-image:/
    url, alt = $'.split(":", 2) # Split the string after "rdoc-image:" into url and alt
    if alt && !alt.empty?
      %[<img src="#{CGI.escapeHTML(url)}" alt="#{CGI.escapeHTML(alt)}">]
    else
      %[<img src="#{CGI.escapeHTML(url)}">]
    end
  when /\Ardoc-[a-z]+:/
    CGI.escapeHTML($')
  end
end

#handle_regexp_HARD_BREAK(target) ⇒ Object

target is a <br>



115
116
117
 
# File 'lib/rdoc/markup/to_html.rb', line 115

def handle_regexp_HARD_BREAK target
  '<br>'
end

#handle_regexp_HYPERLINK(target) ⇒ Object

target is a potential link. The following schemes are handled:

mailto:

Inserted as-is.

http:

Links are checked to see if they reference an image. If so, that image gets inserted using an <img> tag. Otherwise a conventional <a href> is used.

link:

Reference to a local file relative to the output directory.



131
132
133
134
135
 
# File 'lib/rdoc/markup/to_html.rb', line 131

def handle_regexp_HYPERLINK(target)
  url = CGI.escapeHTML(target.text)

  gen_url url, url
end

#handle_regexp_RDOCLINK(target) ⇒ Object

target is an rdoc-schemed link that will be converted into a hyperlink.

For the rdoc-ref scheme the named reference will be returned without creating a link.

For the rdoc-label scheme the footnote and label prefixes are stripped when creating a link. All other contents will be linked verbatim.



146
147
148
 
# File 'lib/rdoc/markup/to_html.rb', line 146

def handle_regexp_RDOCLINK target
  handle_RDOCLINK target.text
end

#handle_regexp_TIDYLINK(target) ⇒ Object

This target is a link where the label is different from the URL label[url] or {long label}[url]



154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
 
# File 'lib/rdoc/markup/to_html.rb', line 154

def handle_regexp_TIDYLINK(target)
  text = target.text

  return text unless
    text =~ /^\{(.*)\}\[(.*?)\]$/ or text =~ /^(\S+)\[(.*?)\]$/

  label = $1
  url   = CGI.escapeHTML($2)

  if /^rdoc-image:/ =~ label
    label = handle_RDOCLINK(label)
  else
    label = CGI.escapeHTML(label)
  end

  gen_url url, label
end

#html_list_name(list_type, open_tag) ⇒ Object

Determines the HTML list element for list_type and open_tag

Raises:



390
391
392
393
394
 
# File 'lib/rdoc/markup/to_html.rb', line 390

def html_list_name(list_type, open_tag)
  tags = LIST_TYPE_TO_HTML[list_type]
  raise RDoc::Error, "Invalid list type: #{list_type.inspect}" unless tags
  tags[open_tag ? 0 : 1]
end

#init_link_notation_regexp_handlings ⇒ Object

Adds regexp handlings about link notations.



80
81
82
83
 
# File 'lib/rdoc/markup/to_html.rb', line 80

def init_link_notation_regexp_handlings
  add_regexp_handling_RDOCLINK
  add_regexp_handling_TIDYLINK
end

#init_regexp_handlings ⇒ Object

Adds regexp handlings.



70
71
72
73
74
75
 
# File 'lib/rdoc/markup/to_html.rb', line 70

def init_regexp_handlings
  # external links
  @markup.add_regexp_handling(/(?:link:|https?:|mailto:|ftp:|irc:|www\.)#{URL_CHARACTERS_REGEXP_STR}+\w/,
                              :HYPERLINK)
  init_link_notation_regexp_handlings
end

#init_tags ⇒ Object

Maps attributes to HTML tags



399
400
401
402
403
 
# File 'lib/rdoc/markup/to_html.rb', line 399

def init_tags
  add_tag :BOLD, "<strong>", "</strong>"
  add_tag :TT,   "<code>",   "</code>"
  add_tag :EM,   "<em>",     "</em>"
end

#list_end_for(list_type) ⇒ Object

Returns the HTML end-tag for list_type



425
426
427
428
429
430
431
432
433
434
 
# File 'lib/rdoc/markup/to_html.rb', line 425

def list_end_for(list_type)
  case list_type
  when :BULLET, :LALPHA, :NUMBER, :UALPHA then
    "</li>"
  when :LABEL, :NOTE then
    "</dd>"
  else
    raise RDoc::Error, "Invalid list type: #{list_type.inspect}"
  end
end

#list_item_start(list_item, list_type) ⇒ Object

Returns the HTML tag for list_type, possible using a label from list_item



409
410
411
412
413
414
415
416
417
418
419
420
 
# File 'lib/rdoc/markup/to_html.rb', line 409

def list_item_start(list_item, list_type)
  case list_type
  when :BULLET, :LALPHA, :NUMBER, :UALPHA then
    "<li>"
  when :LABEL, :NOTE then
    Array(list_item.label).map do |label|
      "<dt>#{to_html label}</dt>\n"
    end.join << "<dd>"
  else
    raise RDoc::Error, "Invalid list type: #{list_type.inspect}"
  end
end

#parseable?(text) ⇒ Boolean

Returns true if text is valid ruby syntax

Returns:

  • (Boolean) 


439
440
441
442
443
444
445
446
447
448
 
# File 'lib/rdoc/markup/to_html.rb', line 439

def parseable? text
  verbose, $VERBOSE = $VERBOSE, nil
  catch(:valid) do
    eval("BEGIN { throw :valid, true }\n#{text}")
  end
rescue SyntaxError
  false
ensure
  $VERBOSE = verbose
end

#start_accepting ⇒ Object

Prepares the visitor for HTML generation



179
180
181
182
183
 
# File 'lib/rdoc/markup/to_html.rb', line 179

def start_accepting
  @res = []
  @in_list_entry = []
  @list = []
end

#to_html(item) ⇒ Object

Converts item to HTML using RDoc::Text#to_html



453
454
455
 
# File 'lib/rdoc/markup/to_html.rb', line 453

def to_html item
  super convert_flow @am.flow item
end