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   1  /**
   2   * File customize-preview.js.
   3   *
   4   * Instantly live-update customizer settings in the preview for improved user experience.
   5   */
   6  
   7  (function( $ ) {
   8  
   9      // Collect information from customize-controls.js about which panels are opening.
  10      wp.customize.bind( 'preview-ready', function() {
  11  
  12          // Initially hide the theme option placeholders on load.
  13          $( '.panel-placeholder' ).hide();
  14  
  15          wp.customize.preview.bind( 'section-highlight', function( data ) {
  16  
  17              // Only on the front page.
  18              if ( ! $( 'body' ).hasClass( 'twentyseventeen-front-page' ) ) {
  19                  return;
  20              }
  21  
  22              // When the section is expanded, show and scroll to the content placeholders, exposing the edit links.
  23              if ( true === data.expanded ) {
  24                  $( 'body' ).addClass( 'highlight-front-sections' );
  25                  $( '.panel-placeholder' ).slideDown( 200, function() {
  26                      $.scrollTo( $( '#panel1' ), {
  27                          duration: 600,
  28                          offset: { 'top': -70 } // Account for sticky menu.
  29                      });
  30                  });
  31  
  32              // If we've left the panel, hide the placeholders and scroll back to the top.
  33              } else {
  34                  $( 'body' ).removeClass( 'highlight-front-sections' );
  35                  // Don't change scroll when leaving - it's likely to have unintended consequences.
  36                  $( '.panel-placeholder' ).slideUp( 200 );
  37              }
  38          });
  39      });
  40  
  41      // Site title and description.
  42      wp.customize( 'blogname', function( value ) {
  43          value.bind( function( to ) {
  44              $( '.site-title a' ).text( to );
  45          });
  46      });
  47      wp.customize( 'blogdescription', function( value ) {
  48          value.bind( function( to ) {
  49              $( '.site-description' ).text( to );
  50          });
  51      });
  52  
  53      // Header text color.
  54      wp.customize( 'header_textcolor', function( value ) {
  55          value.bind( function( to ) {
  56              if ( 'blank' === to ) {
  57                  $( '.site-title, .site-description' ).css({
  58                      clip: 'rect(1px, 1px, 1px, 1px)',
  59                      position: 'absolute'
  60                  });
  61                  // Add class for different logo styles if title and description are hidden.
  62                  $( 'body' ).addClass( 'title-tagline-hidden' );
  63              } else {
  64  
  65                  // Check if the text color has been removed and use default colors in theme stylesheet.
  66                  if ( ! to.length ) {
  67                      $( '#twentyseventeen-custom-header-styles' ).remove();
  68                  }
  69                  $( '.site-title, .site-description' ).css({
  70                      clip: 'auto',
  71                      position: 'relative'
  72                  });
  73                  $( '.site-branding, .site-branding a, .site-description, .site-description a' ).css({
  74                      color: to
  75                  });
  76                  // Add class for different logo styles if title and description are visible.
  77                  $( 'body' ).removeClass( 'title-tagline-hidden' );
  78              }
  79          });
  80      });
  81  
  82      // Color scheme.
  83      wp.customize( 'colorscheme', function( value ) {
  84          value.bind( function( to ) {
  85  
  86              // Update color body class.
  87              $( 'body' )
  88                  .removeClass( 'colors-light colors-dark colors-custom' )
  89                  .addClass( 'colors-' + to );
  90          });
  91      });
  92  
  93      // Custom color hue.
  94      wp.customize( 'colorscheme_hue', function( value ) {
  95          value.bind( function( to ) {
  96  
  97              // Update custom color CSS.
  98              var style = $( '#custom-theme-colors' ),
  99                  hue = style.data( 'hue' ),
 100                  css = style.html();
 101  
 102              // Equivalent to css.replaceAll, with hue followed by comma to prevent values with units from being changed.
 103              css = css.split( hue + ',' ).join( to + ',' );
 104              style.html( css ).data( 'hue', to );
 105          });
 106      });
 107  
 108      // Page layouts.
 109      wp.customize( 'page_layout', function( value ) {
 110          value.bind( function( to ) {
 111              if ( 'one-column' === to ) {
 112                  $( 'body' ).addClass( 'page-one-column' ).removeClass( 'page-two-column' );
 113              } else {
 114                  $( 'body' ).removeClass( 'page-one-column' ).addClass( 'page-two-column' );
 115              }
 116          } );
 117      } );
 118  
 119      // Whether a header image is available.
 120  	function hasHeaderImage() {
 121          var image = wp.customize( 'header_image' )();
 122          return '' !== image && 'remove-header' !== image;
 123      }
 124  
 125      // Whether a header video is available.
 126  	function hasHeaderVideo() {
 127          var externalVideo = wp.customize( 'external_header_video' )(),
 128              video = wp.customize( 'header_video' )();
 129  
 130          return '' !== externalVideo || ( 0 !== video && '' !== video );
 131      }
 132  
 133      // Toggle a body class if a custom header exists.
 134      $.each( [ 'external_header_video', 'header_image', 'header_video' ], function( index, settingId ) {
 135          wp.customize( settingId, function( setting ) {
 136              setting.bind(function() {
 137                  if ( hasHeaderImage() ) {
 138                      $( document.body ).addClass( 'has-header-image' );
 139                  } else {
 140                      $( document.body ).removeClass( 'has-header-image' );
 141                  }
 142  
 143                  if ( ! hasHeaderVideo() ) {
 144                      $( document.body ).removeClass( 'has-header-video' );
 145                  }
 146              } );
 147          } );
 148      } );
 149  
 150  } )( jQuery );