Module: GridHelper

Defined in:
lib/css_grid.rb

Constant Summary collapse

TWELVE_STRING_INTS = 
{ :one => 1, :two => 2, :three => 3, :four => 4, :five => 5, :six => 6, 
:seven => 7, :eight => 8, :nine => 9, :ten => 10, :eleven => 11, :twelve => 12 }
TWELVE_STRING_INTS_INVERT = 
TWELVE_STRING_INTS.invert
GRID_CONFIG = 
{ :classes => Hash.new{ |hash, key| hash[key] = key }, 
:elements => Hash.new(:div).merge(:container => :section) }
TWELVE_FOR_REGEXP = 
TWELVE_STRING_INTS.keys.join '|'

Instance Method Summary collapse

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method_name, *args, &block) ⇒ Object 



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# File 'lib/css_grid.rb', line 130

def method_missing method_name, *args, &block
  case method_name.to_s
  when /^(container|row|(#{ TWELVE_FOR_REGEXP })_span)$/
    self.grid($1.to_sym, *args, &block)
  when /^(#{ TWELVE_FOR_REGEXP })_cols?_container$/
    self.cols_container($1.to_sym, *args, &block)
  when /^(#{ TWELVE_FOR_REGEXP })_spans?_container$/
    self.spans_container($1.to_sym, *args, &block)
  else super
  end
end

Instance Method Details

#cols_container(col_number, options = {}, &block) ⇒ Object 



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# File 'lib/css_grid.rb', line 66

def cols_container col_number, options = {}, &block
  options[:rows] ||= {}
  options[:spans] ||= {}
  
  if @nested_stack.present?
    options[:rows].merge!({:nested => true})
    options[:nested_width] ||= TWELVE_STRING_INTS[@nested_stack.last.to_sym]
  end
      
  disable = [*options.delete(:disable)]
  nested = [*options.delete(:nested)]
  
  options[:rows].merge!({:nested => true}) if nested.delete :container    
  
  collection_length = TWELVE_STRING_INTS[col_number]
  span_width = @span_width || TWELVE_STRING_INTS_INVERT[((options.delete(:nested_width) || 12) / collection_length) - (options[:spans][:prepend] || 0) - (options[:spans][:append] || 0)]
  
  rows = []
  (options.delete(:collection) || [1]).in_groups_of(collection_length, false) do |collection_mini|
    cols = collection_mini.map do |elt|
      @elt = elt
      
      if disable.include? :spans
        capture(elt, &block)
        
      else
        grid("#{ span_width }_span".to_sym, options[:spans].clone) do
          safe_buffer = capture(elt, &block)
          safe_buffer = grid(:row, :nested=>true){ safe_buffer } if nested.include? :spans
          
          safe_buffer
        end
      end
    end
    @elt = nil

    rows << grid(:row, options[:rows].clone){ cols.reduce(:safe_concat) }
  end
  
  safe_buffer = rows.reduce(:safe_concat)
  safe_buffer = grid(:container, options.except!(:spans, :rows)){ safe_buffer } unless disable.delete :container
  Rails.version < "3" ? concat(safe_buffer) : safe_buffer
end

#grid(tag, options = {}, &block) ⇒ Object 



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# File 'lib/css_grid.rb', line 19

def grid tag, options = {}, &block
  options.map_values! do |value|        
    value.class == Proc ? value.call(@elt) : value 
  end
  
  prepend = options.delete :prepend
  prepend = if prepend.present? and TWELVE_STRING_INTS_INVERT.has_key? prepend.abs
    if prepend > 0
      "#{ GRID_CONFIG[:classes][:prepend] }_#{ TWELVE_STRING_INTS_INVERT[prepend] }"
    else
      "#{ GRID_CONFIG[:classes][:minus] }_#{ TWELVE_STRING_INTS_INVERT[prepend.abs] }"
    end
  elsif prepend
    warn "WARNING : invalid value for ':prepend'"
  end
  
  append = options.delete :append
  append = if append and TWELVE_STRING_INTS_INVERT.has_key? append
    "#{ GRID_CONFIG[:classes][:append] }_#{ TWELVE_STRING_INTS_INVERT[append] }"
  elsif append
    warn "WARNING : invalid value for ':append'"
  end
  
  
  warn "WARNING : argument ':nested' is not supported for '#{ tag }'" if options[:nested].present? and tag != :row
  
  if tag.to_s =~ /(one|two|three|four|five|six|seven|eight|nine|ten|eleven|twelve)_span$/
    @nested_stack << $1
      
    unstack = true
  else
    warn "WARNING : argument ':prepend' is not supported for '#{ tag }'" if prepend.present?
    warn "WARNING : argument ':append' is not supported for '#{ tag }'" if append.present?
          
    unstack = false
  end
  
  content_class = [GRID_CONFIG[:classes][tag], options.delete(:class), prepend, append].compact
  content_class << GRID_CONFIG[:classes][:nested] if options.delete(:nested)
  options.merge! :class => content_class.join(" ")
                               
  safe_buffer = content_tag(options.delete(:element) || GRID_CONFIG[:elements][tag], options, &block)
  
  @nested_stack.pop if unstack    
  safe_buffer
end

#initialize(*args) ⇒ Object 



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# File 'lib/css_grid.rb', line 14

def initialize *args
  @nested_stack = []
  super
end

#one_col_row(options = {}, &block) ⇒ Object 



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# File 'lib/css_grid.rb', line 125

def one_col_row options = {}, &block
  cols_container :one, options.merge(:disable=>:container, :rows=>{:id=>options.delete(:id), :class=>options.delete(:class)}), &block
end

#respond_to?(method_name, include_private = false) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/css_grid.rb', line 142

def respond_to? method_name, include_private = false
  case method_name.to_s
  when  /^(container|row|(#{ TWELVE_FOR_REGEXP })_span)$/, 
        /^(#{ TWELVE_FOR_REGEXP })_cols?_container$/,
        /^(#{ TWELVE_FOR_REGEXP })_spans?_container$/
    true
  else super
  end
end

#spans_container(span_width, options = {}, &block) ⇒ Object 



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# File 'lib/css_grid.rb', line 110

def spans_container span_width, options = {}, &block
  if @nested_stack.present?
    options[:nested_width] ||= TWELVE_STRING_INTS[@nested_stack.last.to_sym]
  end
  
  @span_width = span_width
  col_number = TWELVE_STRING_INTS_INVERT[(options.delete(:nested_width) || 12) / TWELVE_STRING_INTS[span_width]]
  
  safe_buffer = cols_container col_number, options, &block
  
  @span_width = nil
  safe_buffer
end