//  --------------------------------------------------------------
//  SASS Gridification
//  * Author:   Chris Eppstein
//  A SASS adaptation of Blueprint CSS
//  * Version:         0.7.1 (2008-02-25)
//  * Website:         http://code.google.com/p/blueprintcss/
//  Based on work by:
//  * Lorin Tackett     [lorintackett.com]
//  * Olav Bjorkoy      [bjorkoy.com]
//  * Nathan Borror     [playgroundblues.com]
//  * Jeff Croft        [jeffcroft.com]
//  * Christian Metts   [mintchaos.com]
//  * Khoi Vinh         [subtraction.com]
//  Read more about using a grid here:
//  * http://www.subtraction.com/2007/03/18/oh-yeeaahh
//  --------------------------------------------------------------

@import compass/utilities/general/float.sass

// Main layout grid, override these constants to build your grid and container sizes.
!blueprint_grid_columns ||= 24
!blueprint_grid_width   ||= 30px
!blueprint_grid_margin  ||= 10px

!blueprint_grid_outer_width = !blueprint_grid_width + !blueprint_grid_margin
!blueprint_container_size = !blueprint_grid_outer_width * !blueprint_grid_columns - !blueprint_grid_margin


=blueprint-grid
  // A container should group all your columns
  .container
    +container
  .column, #{enumerate("div.span", 1, !blueprint_grid_columns)}
    +column-base
  // The last column in a row needs this class (or mixin) or it will end up on the next row.
  .last, div.last
    +last
  // Use these classes (or mixins) to set the width of a column.
  @for !n from 1 to !blueprint_grid_columns
    .span-#{!n}
      +span(!n)
  .span-#{!blueprint_grid_columns}, div.span-#{!blueprint_grid_columns}
    +span(!blueprint_grid_columns)
    :margin 0
  input, textarea, select
    @for !n from 1 through !blueprint_grid_columns
      &.span-#{!n}
        +span(!n, true)
  // Add these to a column to append empty cols.
  @for !n from 1 to !blueprint_grid_columns
    .append-#{!n}
      +append(!n)
  // Add these to a column to prepend empty cols.
  @for !n from 1 to !blueprint_grid_columns
    .prepend-#{!n}
      +prepend(!n)
  // Use these classes on an element to push it into the
  // next column, or to pull it into the previous column.
  #{enumerate(".pull", 1, !blueprint_grid_columns)}
    +pull-base
  @for !n from 1 through !blueprint_grid_columns
    .pull-#{!n}
      +pull-margins(!n)
  #{enumerate(".push", 1, !blueprint_grid_columns)}
    +push-base
  @for !n from 1 through !blueprint_grid_columns
    .push-#{!n}
      +push-margins(!n)


// Columns
// Note: If you use this mixin without the class and want to support ie6
//       you must set text-align left on your container element in an IE stylesheet.
=container
  :width = !blueprint_container_size
  :margin 0 auto
  +clearfix

// The last column in a row needs this mixin or it will end up on the next row.
// TODO add this to span mixin when we have optional arguments
=last
  :margin-right 0

=span(!n, !override = false)
  !width = !blueprint_grid_width * !n + (!blueprint_grid_margin * (!n - 1))
  @if !override
    :width = !width !important
  @else
    :width = !width

=column-base(!last = false)
  +float-left
  @if !last
    +last
  @else
    :margin-right = !blueprint_grid_margin
  * html &
    :overflow-x hidden

// Use this mixins to set the width of n columns.
=column(!n, !last = false)
  +column-base(!last)
  +span(!n)


// Mixin to a column to append n empty cols.
=append(!n)
  :padding-right = (!blueprint_grid_outer_width) * !n

// Mixin to a column to prepend n empty cols.
=prepend(!n)
  :padding-left = (!blueprint_grid_outer_width) * !n

=pull-base
  +float-left
  :position relative

=pull-margins(!n, !last = false)
  @if !last
    :margin-left = (-!blueprint_grid_outer_width * !n) + !blueprint_grid_margin
  @else
    :margin-left = -!blueprint_grid_outer_width * !n

// mixin to a column to move it n columns to the left
=pull(!n, !last = false)
  +pull-base
  +pull-margins(!n, !last)

=push-base
  +float-right
  :position relative

=push-margins(!n)
  :margin= 0 (-!blueprint_grid_outer_width * !n) 1.5em (!blueprint_grid_outer_width * !n)

// mixin to a column to push it n columns to the right
=push(!n)
  +push-base
  +push-margins(!n)

// Border on right hand side of a column.
=border(!border_color = #eee, !border_width = 1px)
  :padding-right = !blueprint_grid_margin / 2 - !border_width
  :margin-right = !blueprint_grid_margin / 2
  :border-right #{!border_width} solid #{!border_color}

// Border with more whitespace, spans one column.
=colborder(!border_color = #eee, !border_width = 1px)
  :padding-right= floor((!blueprint_grid_width + 2 * !blueprint_grid_margin - !border_width)/2)
  :margin-right= ceil((!blueprint_grid_width + 2 * !blueprint_grid_margin - !border_width)/2)
  :border-right #{!border_width} solid #{!border_color}

// Mixin this to an hr to make a horizontal ruler across a column.
=colruler(!border_color = #ddd)
  :background= !border_color
  :color= !border_color
  :clear both
  :float none
  :width 100%
  :height .1em
  :margin 0 0 1.45em
  :border none

// Mixin this to an hr to make a horizontal spacer across a column.
=colspacer
  +colruler
  :background #fff
  :color #fff