Class: Haml::Parser

Inherits:
Object
  • Object
show all
Includes:
Util
Defined in:
lib/haml/parser.rb

Constant Summary collapse

ELEMENT =

Designates an XHTML/XML element.

?%
DIV_CLASS =

Designates a <div> element with the given class.

?.
DIV_ID =

Designates a <div> element with the given id.

?#
COMMENT =

Designates an XHTML/XML comment.

?/
DOCTYPE =

Designates an XHTML doctype or script that is never HTML-escaped.

?!
SCRIPT =

Designates script, the result of which is output.

?=
SANITIZE =

Designates script that is always HTML-escaped.

?&
FLAT_SCRIPT =

Designates script, the result of which is flattened and output.

?~
SILENT_SCRIPT =

Designates script which is run but not output.

?-
SILENT_COMMENT =

When following SILENT_SCRIPT, designates a comment that is not output.

?#
ESCAPE =

Designates a non-parsed line.

?\\
FILTER =

Designates a block of filtered text.

?:
PLAIN_TEXT =

Designates a non-parsed line. Not actually a character.

-1
SPECIAL_CHARACTERS =

Keeps track of the ASCII values of the characters that begin a specially-interpreted line.

[
  ELEMENT,
  DIV_CLASS,
  DIV_ID,
  COMMENT,
  DOCTYPE,
  SCRIPT,
  SANITIZE,
  FLAT_SCRIPT,
  SILENT_SCRIPT,
  ESCAPE,
  FILTER
]
MULTILINE_CHAR_VALUE =

The value of the character that designates that a line is part of a multiline string.

?|
BLOCK_WITH_SPACES =

Regex to check for blocks with spaces around arguments. Not to be confused with multiline script. For example: foo.each do | bar | = bar

/do[\s]*\|[\s]*[^\|]*[\s]+\|\z/
MID_BLOCK_KEYWORDS = 
%w[else elsif rescue ensure end when]
START_BLOCK_KEYWORDS = 
%w[if begin case unless]
START_BLOCK_KEYWORD_REGEX =

Try to parse assignments to block starters as best as possible

/(?:\w+(?:,\s*\w+)*\s*=\s*)?(#{START_BLOCK_KEYWORDS.join('|')})/
BLOCK_KEYWORD_REGEX = 
/^-?\s*(?:(#{MID_BLOCK_KEYWORDS.join('|')})|#{START_BLOCK_KEYWORD_REGEX.source})\b/
DOCTYPE_REGEX =

The Regex that matches a Doctype command.

/(\d(?:\.\d)?)?[\s]*([a-z]*)\s*([^ ]+)?/i
LITERAL_VALUE_REGEX =

The Regex that matches a literal string or symbol value

/:(\w*)|(["'])((?![\\#]|\2).|\\.)*\2/

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Util

#av_template_class, #caller_info, #check_encoding, #check_haml_encoding, #contains_interpolation?, #def_static_method, #handle_interpolation, #html_safe, #human_indentation, #inspect_obj, #powerset, #rails_xss_safe?, #silence_warnings, #static_method_name, #unescape_interpolation

Constructor Details

#initialize(template, options) ⇒ Parser

Returns a new instance of Parser.



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# File 'lib/haml/parser.rb', line 89

def initialize(template, options)
  # :eod is a special end-of-document marker
  @template           = (template.rstrip).split(/\r\n|\r|\n/) + [:eod, :eod]
  @options            = options
  @flat               = false
  @index              = 0
  # Record the indent levels of "if" statements to validate the subsequent
  # elsif and else statements are indented at the appropriate level.
  @script_level_stack = []
  @template_index     = 0
  @template_tabs      = 0
end

Instance Attribute Details

#root (readonly)

Returns the value of attribute root.



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# File 'lib/haml/parser.rb', line 7

def root
  @root
end

Instance Method Details

#parse 



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# File 'lib/haml/parser.rb', line 102

def parse
  @root = @parent = ParseNode.new(:root)
  @haml_comment = false
  @indentation = nil
  @line = next_line

  raise SyntaxError.new(Error.message(:indenting_at_start), @line.index) if @line.tabs != 0

  while next_line
    process_indent(@line) unless @line.text.empty?

    if flat?
      text = @line.full.dup
      text = "" unless text.gsub!(/^#{@flat_spaces}/, '')
      @filter_buffer << "#{text}\n"
      @line = @next_line
      next
    end

    @tab_up = nil
    process_line(@line.text, @line.index) unless @line.text.empty? || @haml_comment
    if @parent.type != :haml_comment && (block_opened? || @tab_up)
      @template_tabs += 1
      @parent = @parent.children.last
    end

    if !@haml_comment && !flat? && @next_line.tabs - @line.tabs > 1
      raise SyntaxError.new(Error.message(:deeper_indenting, @next_line.tabs - @line.tabs), @next_line.index)
    end

    @line = @next_line
  end

  # Close all the open tags
  close until @parent.type == :root
  @root
rescue Haml::Error => e
  e.backtrace.unshift "#{@options[:filename]}:#{(e.line ? e.line + 1 : @index) + @options[:line] - 1}"
  raise
end