////////////////////////
// Enhance From
//
// - $feature: Modernizr feature (base CSS class name)
////////////////////////
@mixin enhance-with($feature) {
  .#{$feature} & {
    @content;
  }
}

////////////////////////
// Degrade From
//
// - $feature: Modernizr feature (base CSS class name)
////////////////////////
@mixin degrade-from($feature) {
  .no-#{$feature} &,
  .no-js & {
    @content;
  }
}

////////////////////////
// Progressive Enhancement Text Replace Mixin
//
// - $png-path: The path to the pngs for the image sprite, including the *.png (just like normal image sprites)
// - $sprite: The name of the sprite you want to use (this is the file name without extension)
// - $inline-svg: Switches between a Base64 encoded SVG or a normal url() for the SVG. Default to true
// - $with-dimensions: Switches between including dimensions (height/width for all and background-size for SVG) or not. Defaults to true.
// - $inline: Whether or not the containing selector is an inline element. Defaults to false.
////////////////////////
@mixin replace-text-pe($png-path, $sprite, $inline-svg: true, $with-dimensions: true, $inline: false) {
  // Map Out the Sprite
  $sprite-map: sprite-map($png-path);
  
  // Build SVG file name
  $svg-file: str-replace('*.png', '#{$sprite}.svg', $png-path);
  
  // Default Sprite File
  $sprite-file: '' !default;
  
  @if $with-dimensions {
    // Get Sprite File for Height/Width
    $sprite-file: sprite-file($sprite-map, $sprite);

    // Put the height/width of the image in
    width: image-width($sprite-file);
    height: image-height($sprite-file);
  }
  
  // Hide text. Use squish-text() if the element is inline
  @if $inline {
    @extend %replace-text-pe-squish;
  }
  @else {
    @extend %replace-text-pe-hide;
  }
  
  // Enhance with SVG
  @include enhance-with('svg') {
    // Inline the SVG so that advanced browsers and future tech doesn't need the extra HTTP requests for the SVG
    @if $inline-svg {
      background-image: inline-image($svg-file);
    }
    @else {
      background-image: image-url($svg-file);
    }
    // No repeating backgrounds, please
    background-repeat: no-repeat;
    // Set background size to ensure that our SVG is the right size.
    @if $with-dimensions {
      background-size: image-width($sprite-file) image-height($sprite-file);
    }
  }
  
  // Degrade from SVG 
  @include degrade-from('svg') {
    // Extend the Sprite Background
    @extend %#{sprite-map-name($sprite-map)}-image-map;
    // Call the Sprite'd image's position.
    @include sprite($sprite-map, $sprite);
  }
}

//////////////////////////////
// Sprite Map Generator
//
// Need a custom mixin to create extendable classes classes for background image for sprites because dynamic mixin names don't work.
//
// - $png-path: The path to the pngs for the image sprite, including the *.png (just like normal image sprites)
//////////////////////////////
@mixin sprite-map-generator($png-path) {
  $png-path: sprite-map($png-path);
  %#{sprite-map-name($png-path)}-image-map {
    background: {
      image: $png-path;
      repeat: no-repeat;
    }
  }
}

//////////////////////////////
// Extendable Class for Squish Text mixin
//////////////////////////////
%replace-text-pe-squish {
  @include squish-text();
}

//////////////////////////////
// Extendable Class for Hide Text mixin
//////////////////////////////
%replace-text-pe-hide {
  @include hide-text();
}