Class: Slideshow::Slide

Inherits:
Object
  • Object
show all
Defined in:
lib/slideshow/slide.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(content, options) ⇒ Slide

Returns a new instance of Slide.



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# File 'lib/slideshow/slide.rb', line 17

def initialize( content, options )
  @logger       = options.logger
  @header_level = options.header_level
  
  @content = content
  
  @header                 = nil
  @content_without_header = nil
  @classes                = nil   # NB: style classes as all in one string
  @data    = {}
  
  parse()
end

Instance Attribute Details

#classes ⇒ Object

Returns the value of attribute classes.



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# File 'lib/slideshow/slide.rb', line 15

def classes
  @classes
end

#content ⇒ Object

NB: unparsed html source (use content_without_header

for content without option header)



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# File 'lib/slideshow/slide.rb', line 12

def content
  @content
end

#content_without_header ⇒ Object

Returns the value of attribute content_without_header.



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# File 'lib/slideshow/slide.rb', line 13

def content_without_header
  @content_without_header
end

#header ⇒ Object

Returns the value of attribute header.



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# File 'lib/slideshow/slide.rb', line 14

def header
  @header
end

#logger ⇒ Object

Returns the value of attribute logger.



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# File 'lib/slideshow/slide.rb', line 7

def logger
  @logger
end

Instance Method Details

#data_attributes ⇒ Object 



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# File 'lib/slideshow/slide.rb', line 84

def data_attributes
  buf = ""
  @data.each do | key,value |
    buf << "data-#{key}='#{value}' "
  end
  buf
end

#parse ⇒ Object 



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# File 'lib/slideshow/slide.rb', line 31

def parse
  ## pass 1) check for (css style) classes and data attributes
  ## check for css style classes
  from = 0
  while( pos = @content.index( /<!-- _S9(SLIDE|STYLE)_(.*?)-->/m, from ))
    logger.debug "  adding css classes from pi >#{$1.downcase}<: >#{$2.strip}<"

    from = Regexp.last_match.end(0)  # continue search later from here
    
    values = $2.strip.dup
    
    # remove data values (eg. x=-20 scale=4) and store in data hash
    values.gsub!( /([-\w]+)[ \t]*=[ \t]*([-\w\.]+)/ ) do |_|
      logger.debug "    adding data pair: key=>#{$1.downcase}< value=>#{$2}<"
      @data[ $1.downcase.dup ] = $2.dup
      " "  # replace w/ space
    end
    
    values.strip!  # remove spaces  # todo: use squish or similar and check for empty string
            
    if @classes.nil?
      @classes = values
    else
      @classes << " #{values}"
    end
  end

  ## pass 2) split slide source into header (optional) and content/body

  ## todo: add option split on h1/h2 etc.

  # try to extract first header using non-greedy .+? pattern;
  # tip test regex online at rubular.com
  #  note/fix: needs to get improved to also handle case for h1 wrapped into div

  if @header_level == 2
    pattern = /^(.*?)(<h2.*?>.*?<\/h2>)(.*)/m
  else # assume header level 1
    pattern = /^(.*?)(<h1.*?>.*?<\/h1>)(.*)/m
  end

  if @content =~ pattern
    @header  = $2
    @content_without_header = ($1 ? $1 : '') + ($3 ? $3 : '')
    logger.debug "  adding slide with header (h1):\n#{@header}"
  else
    @header = nil    # todo: set to '' empty string? why not?
    @content_without_header = @content
    logger.debug "  adding slide with *no* header:\n#{@content}"
  end
end

#to_classic_html ⇒ Object

convenience helpers



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# File 'lib/slideshow/slide.rb', line 95

def to_classic_html
  buf  = ""
  buf << "<div class='slide "
  buf << classes    if classes
  buf << "'>\n"
  buf << content
  buf << "</div>\n"
  buf
end

#to_google_html5 ⇒ Object 



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# File 'lib/slideshow/slide.rb', line 105

def to_google_html5
  buf  = ""
  buf << "<div class='slide'>\n"
  buf << "<header>#{header}</header>\n"   if header
  buf << "<section "
  buf << "class='#{classes}'"             if classes
  buf << "'>\n"
  buf << content_without_header           if content_without_header
  buf << "</section>\n"
  buf << "</div>\n"
  buf
end