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   1  <?php
   2  /**
   3   * Layout block support flag.
   4   *
   5   * @package WordPress
   6   * @since 5.8.0
   7   */
   8  
   9  /**
  10   * Registers the layout block attribute for block types that support it.
  11   *
  12   * @since 5.8.0
  13   * @access private
  14   *
  15   * @param WP_Block_Type $block_type Block Type.
  16   */
  17  function wp_register_layout_support( $block_type ) {
  18      $support_layout = block_has_support( $block_type, array( '__experimentalLayout' ), false );
  19      if ( $support_layout ) {
  20          if ( ! $block_type->attributes ) {
  21              $block_type->attributes = array();
  22          }
  23  
  24          if ( ! array_key_exists( 'layout', $block_type->attributes ) ) {
  25              $block_type->attributes['layout'] = array(
  26                  'type' => 'object',
  27              );
  28          }
  29      }
  30  }
  31  
  32  /**
  33   * Generates the CSS corresponding to the provided layout.
  34   *
  35   * @since 5.9.0
  36   * @access private
  37   *
  38   * @param string  $selector                      CSS selector.
  39   * @param array   $layout                        Layout object. The one that is passed has already checked
  40   *                                               the existence of default block layout.
  41   * @param boolean $has_block_gap_support         Whether the theme has support for the block gap.
  42   * @param string  $gap_value                     The block gap value to apply.
  43   * @param boolean $should_skip_gap_serialization Whether to skip applying the user-defined value set in the editor.
  44   * @return string CSS style.
  45   */
  46  function wp_get_layout_style( $selector, $layout, $has_block_gap_support = false, $gap_value = null, $should_skip_gap_serialization = false ) {
  47      $layout_type = isset( $layout['type'] ) ? $layout['type'] : 'default';
  48  
  49      $style = '';
  50      if ( 'default' === $layout_type ) {
  51          $content_size = isset( $layout['contentSize'] ) ? $layout['contentSize'] : '';
  52          $wide_size    = isset( $layout['wideSize'] ) ? $layout['wideSize'] : '';
  53  
  54          $all_max_width_value  = $content_size ? $content_size : $wide_size;
  55          $wide_max_width_value = $wide_size ? $wide_size : $content_size;
  56  
  57          // Make sure there is a single CSS rule, and all tags are stripped for security.
  58          $all_max_width_value  = safecss_filter_attr( explode( ';', $all_max_width_value )[0] );
  59          $wide_max_width_value = safecss_filter_attr( explode( ';', $wide_max_width_value )[0] );
  60  
  61          if ( $content_size || $wide_size ) {
  62              $style  = "$selector > :where(:not(.alignleft):not(.alignright)) {";
  63              $style .= 'max-width: ' . esc_html( $all_max_width_value ) . ';';
  64              $style .= 'margin-left: auto !important;';
  65              $style .= 'margin-right: auto !important;';
  66              $style .= '}';
  67  
  68              $style .= "$selector > .alignwide { max-width: " . esc_html( $wide_max_width_value ) . ';}';
  69              $style .= "$selector .alignfull { max-width: none; }";
  70          }
  71  
  72          $style .= "$selector > .alignleft { float: left; margin-inline-start: 0; margin-inline-end: 2em; }";
  73          $style .= "$selector > .alignright { float: right; margin-inline-start: 2em; margin-inline-end: 0; }";
  74          $style .= "$selector > .aligncenter { margin-left: auto !important; margin-right: auto !important; }";
  75          if ( $has_block_gap_support ) {
  76              if ( is_array( $gap_value ) ) {
  77                  $gap_value = isset( $gap_value['top'] ) ? $gap_value['top'] : null;
  78              }
  79              $gap_style = $gap_value && ! $should_skip_gap_serialization ? $gap_value : 'var( --wp--style--block-gap )';
  80              $style    .= "$selector > * { margin-block-start: 0; margin-block-end: 0; }";
  81              $style    .= "$selector > * + * { margin-block-start: $gap_style; margin-block-end: 0; }";
  82          }
  83      } elseif ( 'flex' === $layout_type ) {
  84          $layout_orientation = isset( $layout['orientation'] ) ? $layout['orientation'] : 'horizontal';
  85  
  86          $justify_content_options = array(
  87              'left'   => 'flex-start',
  88              'right'  => 'flex-end',
  89              'center' => 'center',
  90          );
  91  
  92          if ( 'horizontal' === $layout_orientation ) {
  93              $justify_content_options += array( 'space-between' => 'space-between' );
  94          }
  95  
  96          $flex_wrap_options = array( 'wrap', 'nowrap' );
  97          $flex_wrap         = ! empty( $layout['flexWrap'] ) && in_array( $layout['flexWrap'], $flex_wrap_options, true ) ?
  98              $layout['flexWrap'] :
  99              'wrap';
 100  
 101          $style  = "$selector {";
 102          $style .= 'display: flex;';
 103          if ( $has_block_gap_support ) {
 104              if ( is_array( $gap_value ) ) {
 105                  $gap_row    = isset( $gap_value['top'] ) ? $gap_value['top'] : '0.5em';
 106                  $gap_column = isset( $gap_value['left'] ) ? $gap_value['left'] : '0.5em';
 107                  $gap_value  = $gap_row === $gap_column ? $gap_row : $gap_row . ' ' . $gap_column;
 108              }
 109              $gap_style = $gap_value && ! $should_skip_gap_serialization ? $gap_value : 'var( --wp--style--block-gap, 0.5em )';
 110              $style    .= "gap: $gap_style;";
 111          } else {
 112              $style .= 'gap: 0.5em;';
 113          }
 114  
 115          $style .= "flex-wrap: $flex_wrap;";
 116          if ( 'horizontal' === $layout_orientation ) {
 117              $style .= 'align-items: center;';
 118              /**
 119               * Add this style only if is not empty for backwards compatibility,
 120               * since we intend to convert blocks that had flex layout implemented
 121               * by custom css.
 122               */
 123              if ( ! empty( $layout['justifyContent'] ) && array_key_exists( $layout['justifyContent'], $justify_content_options ) ) {
 124                  $style .= "justify-content: {$justify_content_options[ $layout['justifyContent'] ]};";
 125              }
 126          } else {
 127              $style .= 'flex-direction: column;';
 128              if ( ! empty( $layout['justifyContent'] ) && array_key_exists( $layout['justifyContent'], $justify_content_options ) ) {
 129                  $style .= "align-items: {$justify_content_options[ $layout['justifyContent'] ]};";
 130              } else {
 131                  $style .= 'align-items: flex-start;';
 132              }
 133          }
 134          $style .= '}';
 135  
 136          $style .= "$selector > * { margin: 0; }";
 137      }
 138  
 139      return $style;
 140  }
 141  
 142  /**
 143   * Renders the layout config to the block wrapper.
 144   *
 145   * @since 5.8.0
 146   * @access private
 147   *
 148   * @param string $block_content Rendered block content.
 149   * @param array  $block         Block object.
 150   * @return string Filtered block content.
 151   */
 152  function wp_render_layout_support_flag( $block_content, $block ) {
 153      $block_type     = WP_Block_Type_Registry::get_instance()->get_registered( $block['blockName'] );
 154      $support_layout = block_has_support( $block_type, array( '__experimentalLayout' ), false );
 155  
 156      if ( ! $support_layout ) {
 157          return $block_content;
 158      }
 159  
 160      $block_gap             = wp_get_global_settings( array( 'spacing', 'blockGap' ) );
 161      $default_layout        = wp_get_global_settings( array( 'layout' ) );
 162      $has_block_gap_support = isset( $block_gap ) ? null !== $block_gap : false;
 163      $default_block_layout  = _wp_array_get( $block_type->supports, array( '__experimentalLayout', 'default' ), array() );
 164      $used_layout           = isset( $block['attrs']['layout'] ) ? $block['attrs']['layout'] : $default_block_layout;
 165      if ( isset( $used_layout['inherit'] ) && $used_layout['inherit'] ) {
 166          if ( ! $default_layout ) {
 167              return $block_content;
 168          }
 169          $used_layout = $default_layout;
 170      }
 171  
 172      $class_name = wp_unique_id( 'wp-container-' );
 173      $gap_value  = _wp_array_get( $block, array( 'attrs', 'style', 'spacing', 'blockGap' ) );
 174      // Skip if gap value contains unsupported characters.
 175      // Regex for CSS value borrowed from `safecss_filter_attr`, and used here
 176      // because we only want to match against the value, not the CSS attribute.
 177      if ( is_array( $gap_value ) ) {
 178          foreach ( $gap_value as $key => $value ) {
 179              $gap_value[ $key ] = $value && preg_match( '%[\\\(&=}]|/\*%', $value ) ? null : $value;
 180          }
 181      } else {
 182          $gap_value = $gap_value && preg_match( '%[\\\(&=}]|/\*%', $gap_value ) ? null : $gap_value;
 183      }
 184  
 185      // If a block's block.json skips serialization for spacing or spacing.blockGap,
 186      // don't apply the user-defined value to the styles.
 187      $should_skip_gap_serialization = wp_should_skip_block_supports_serialization( $block_type, 'spacing', 'blockGap' );
 188      $style                         = wp_get_layout_style( ".$class_name", $used_layout, $has_block_gap_support, $gap_value, $should_skip_gap_serialization );
 189      // This assumes the hook only applies to blocks with a single wrapper.
 190      // I think this is a reasonable limitation for that particular hook.
 191      $content = preg_replace(
 192          '/' . preg_quote( 'class="', '/' ) . '/',
 193          'class="' . esc_attr( $class_name ) . ' ',
 194          $block_content,
 195          1
 196      );
 197  
 198      wp_enqueue_block_support_styles( $style );
 199  
 200      return $content;
 201  }
 202  
 203  // Register the block support.
 204  WP_Block_Supports::get_instance()->register(
 205      'layout',
 206      array(
 207          'register_attribute' => 'wp_register_layout_support',
 208      )
 209  );
 210  add_filter( 'render_block', 'wp_render_layout_support_flag', 10, 2 );
 211  
 212  /**
 213   * For themes without theme.json file, make sure
 214   * to restore the inner div for the group block
 215   * to avoid breaking styles relying on that div.
 216   *
 217   * @since 5.8.0
 218   * @access private
 219   *
 220   * @param string $block_content Rendered block content.
 221   * @param array  $block         Block object.
 222   * @return string Filtered block content.
 223   */
 224  function wp_restore_group_inner_container( $block_content, $block ) {
 225      $tag_name                         = isset( $block['attrs']['tagName'] ) ? $block['attrs']['tagName'] : 'div';
 226      $group_with_inner_container_regex = sprintf(
 227          '/(^\s*<%1$s\b[^>]*wp-block-group(\s|")[^>]*>)(\s*<div\b[^>]*wp-block-group__inner-container(\s|")[^>]*>)((.|\S|\s)*)/U',
 228          preg_quote( $tag_name, '/' )
 229      );
 230  
 231      if (
 232          WP_Theme_JSON_Resolver::theme_has_support() ||
 233          1 === preg_match( $group_with_inner_container_regex, $block_content ) ||
 234          ( isset( $block['attrs']['layout']['type'] ) && 'default' !== $block['attrs']['layout']['type'] )
 235      ) {
 236          return $block_content;
 237      }
 238  
 239      $replace_regex   = sprintf(
 240          '/(^\s*<%1$s\b[^>]*wp-block-group[^>]*>)(.*)(<\/%1$s>\s*$)/ms',
 241          preg_quote( $tag_name, '/' )
 242      );
 243      $updated_content = preg_replace_callback(
 244          $replace_regex,
 245          static function( $matches ) {
 246              return $matches[1] . '<div class="wp-block-group__inner-container">' . $matches[2] . '</div>' . $matches[3];
 247          },
 248          $block_content
 249      );
 250      return $updated_content;
 251  }
 252  
 253  add_filter( 'render_block_core/group', 'wp_restore_group_inner_container', 10, 2 );
 254  
 255  /**
 256   * For themes without theme.json file, make sure
 257   * to restore the outer div for the aligned image block
 258   * to avoid breaking styles relying on that div.
 259   *
 260   * @since 6.0.0
 261   * @access private
 262   *
 263   * @param string $block_content Rendered block content.
 264   * @param  array  $block        Block object.
 265   * @return string Filtered block content.
 266   */
 267  function wp_restore_image_outer_container( $block_content, $block ) {
 268      $image_with_align = "
 269  /# 1) everything up to the class attribute contents
 270  (
 271      ^\s*
 272      <figure\b
 273      [^>]*
 274      \bclass=
 275      [\"']
 276  )
 277  # 2) the class attribute contents
 278  (
 279      [^\"']*
 280      \bwp-block-image\b
 281      [^\"']*
 282      \b(?:alignleft|alignright|aligncenter)\b
 283      [^\"']*
 284  )
 285  # 3) everything after the class attribute contents
 286  (
 287      [\"']
 288      [^>]*
 289      >
 290      .*
 291      <\/figure>
 292  )/iUx";
 293  
 294      if (
 295          WP_Theme_JSON_Resolver::theme_has_support() ||
 296          0 === preg_match( $image_with_align, $block_content, $matches )
 297      ) {
 298          return $block_content;
 299      }
 300  
 301      $wrapper_classnames = array( 'wp-block-image' );
 302  
 303      // If the block has a classNames attribute these classnames need to be removed from the content and added back
 304      // to the new wrapper div also.
 305      if ( ! empty( $block['attrs']['className'] ) ) {
 306          $wrapper_classnames = array_merge( $wrapper_classnames, explode( ' ', $block['attrs']['className'] ) );
 307      }
 308      $content_classnames          = explode( ' ', $matches[2] );
 309      $filtered_content_classnames = array_diff( $content_classnames, $wrapper_classnames );
 310  
 311      return '<div class="' . implode( ' ', $wrapper_classnames ) . '">' . $matches[1] . implode( ' ', $filtered_content_classnames ) . $matches[3] . '</div>';
 312  }
 313  
 314  add_filter( 'render_block_core/image', 'wp_restore_image_outer_container', 10, 2 );