Class: SM::ToLaTeX

Inherits:
Object
  • Object
show all
Defined in:
lib/rdoc/markup/simple_markup/to_latex.rb

Overview

Convert SimpleMarkup to basic LaTeX report format

Defined Under Namespace

Classes: InlineTag

Constant Summary collapse

BS = 
"\020"
OB = 
"\021"
CB = 
"\022"
DL =

\ { } Dollar

"\023"
BACKSLASH = 
"#{BS}symbol#{OB}92#{CB}"
HAT = 
"#{BS}symbol#{OB}94#{CB}"
BACKQUOTE = 
"#{BS}symbol#{OB}0#{CB}"
TILDE = 
"#{DL}#{BS}sim#{DL}"
LESSTHAN = 
"#{DL}<#{DL}"
GREATERTHAN = 
"#{DL}>#{DL}"
LIST_TYPE_TO_LATEX = 
{
  ListBase::BULLET =>  [ l("\\begin{itemize}"), l("\\end{itemize}") ],
  ListBase::NUMBER =>  [ l("\\begin{enumerate}"), l("\\end{enumerate}"), "\\arabic" ],
  ListBase::UPPERALPHA =>  [ l("\\begin{enumerate}"), l("\\end{enumerate}"), "\\Alph" ],
  ListBase::LOWERALPHA =>  [ l("\\begin{enumerate}"), l("\\end{enumerate}"), "\\alph" ],
  ListBase::LABELED => [ l("\\begin{description}"), l("\\end{description}") ],
  ListBase::NOTE    => [
    l("\\begin{tabularx}{\\linewidth}{@{} l X @{}}"), 
    l("\\end{tabularx}") ],
}

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ ToLaTeX

Returns a new instance of ToLaTeX.



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# File 'lib/rdoc/markup/simple_markup/to_latex.rb', line 45

def initialize
  init_tags
  @list_depth = 0
  @prev_list_types = []
end

Class Method Details

.l(str) ⇒ Object 



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# File 'lib/rdoc/markup/simple_markup/to_latex.rb', line 24

def self.l(str)
  str.tr('\\', BS).tr('{', OB).tr('}', CB).tr('$', DL)
end

Instance Method Details

#accept_blank_line(am, fragment) ⇒ Object 



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# File 'lib/rdoc/markup/simple_markup/to_latex.rb', line 139

def accept_blank_line(am, fragment)
  # @res << "\n"
end

#accept_heading(am, fragment) ⇒ Object 



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# File 'lib/rdoc/markup/simple_markup/to_latex.rb', line 143

def accept_heading(am, fragment)
  @res << convert_heading(fragment.head_level, am.flow(fragment.txt))
end

#accept_list_end(am, fragment) ⇒ Object 



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# File 'lib/rdoc/markup/simple_markup/to_latex.rb', line 123

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

#accept_list_item(am, fragment) ⇒ Object 



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# File 'lib/rdoc/markup/simple_markup/to_latex.rb', line 130

def accept_list_item(am, fragment)
  if tag = @in_list_entry.last
    @res << tag << "\n"
  end
  @res << list_item_start(am, fragment)
  @res << wrap(convert_flow(am.flow(fragment.txt))) << "\n"
  @in_list_entry[-1] = list_end_for(fragment.type)
end

#accept_list_start(am, fragment) ⇒ Object 



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# File 'lib/rdoc/markup/simple_markup/to_latex.rb', line 118

def accept_list_start(am, fragment)
  @res << list_name(fragment.type, true) <<"\n"
  @in_list_entry.push false
end

#accept_paragraph(am, fragment) ⇒ Object 



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# File 'lib/rdoc/markup/simple_markup/to_latex.rb', line 101

def accept_paragraph(am, fragment)
  @res << wrap(convert_flow(am.flow(fragment.txt)))
  @res << "\n"
end

#accept_rule(am, fragment) ⇒ Object 



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# File 'lib/rdoc/markup/simple_markup/to_latex.rb', line 112

def accept_rule(am, fragment)
  size = fragment.param
  size = 10 if size > 10
  @res << "\n\n\\rule{\\linewidth}{#{size}pt}\n\n"
end

#accept_verbatim(am, fragment) ⇒ Object 



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# File 'lib/rdoc/markup/simple_markup/to_latex.rb', line 106

def accept_verbatim(am, fragment)
  @res << "\n\\begin{code}\n"
  @res << fragment.txt.sub(/[\n\s]+\Z/, '')
  @res << "\n\\end{code}\n\n"
end

#add_tag(name, start, stop) ⇒ Object

Add a new set of LaTeX tags for an attribute. We allow separate start and end tags for flexibility



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# File 'lib/rdoc/markup/simple_markup/to_latex.rb', line 84

def add_tag(name, start, stop)
  @attr_tags << InlineTag.new(SM::Attribute.bitmap_for(name), start, stop)
end

#end_accepting ⇒ Object 



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# File 'lib/rdoc/markup/simple_markup/to_latex.rb', line 97

def end_accepting
  @res.tr(BS, '\\').tr(OB, '{').tr(CB, '}').tr(DL, '$')
end

#escape(str) ⇒ Object

Escape a LaTeX string



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# File 'lib/rdoc/markup/simple_markup/to_latex.rb', line 64

def escape(str)
# $stderr.print "FE: ", str
  s = str.
#        sub(/\s+$/, '').
    gsub(/([_\${}&%#])/, "#{BS}\\1").
    gsub(/\\/, BACKSLASH).
    gsub(/\^/, HAT).
    gsub(/~/,  TILDE).
    gsub(/</,  LESSTHAN).
    gsub(/>/,  GREATERTHAN).
    gsub(/,,/, ",{},").
    gsub(/\`/,  BACKQUOTE)
# $stderr.print "-> ", s, "\n"
  s
end

#init_tags ⇒ Object

Set up the standard mapping of attributes to LaTeX



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# File 'lib/rdoc/markup/simple_markup/to_latex.rb', line 54

def init_tags
  @attr_tags = [
    InlineTag.new(SM::Attribute.bitmap_for(:BOLD), l("\\textbf{"), l("}")),
    InlineTag.new(SM::Attribute.bitmap_for(:TT),   l("\\texttt{"), l("}")),
    InlineTag.new(SM::Attribute.bitmap_for(:EM),   l("\\emph{"), l("}")),
  ]
end

#l(arg) ⇒ Object 



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# File 'lib/rdoc/markup/simple_markup/to_latex.rb', line 28

def l(arg)
  SM::ToLaTeX.l(arg)
end

#start_accepting ⇒ Object

Here's the client side of the visitor pattern



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# File 'lib/rdoc/markup/simple_markup/to_latex.rb', line 92

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

#wrap(txt, line_len = 76) ⇒ Object

This is a higher speed (if messier) version of wrap



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# File 'lib/rdoc/markup/simple_markup/to_latex.rb', line 149

def wrap(txt, line_len = 76)
  res = ""
  sp = 0
  ep = txt.length
  while sp < ep
    # scan back for a space
    p = sp + line_len - 1
    if p >= ep
      p = ep
    else
      while p > sp and txt[p] != ?\s
        p -= 1
      end
      if p <= sp
        p = sp + line_len
        while p < ep and txt[p] != ?\s
          p += 1
        end
      end
    end
    res << txt[sp...p] << "\n"
    sp = p
    sp += 1 while sp < ep and txt[sp] == ?\s
  end
  res
end