fix: position calculation for inline popups

includes/class-newspack-popups-inserter.php

@@ -264,6 +264,18 @@ public static function get_block_content( $block ) {
 		return $block_content;
 	}
 
+	/**
+	 * Get the length of a given block.
+	 *
+	 * @param array $block A block.
+	 *
+	 * @return int
+	 */
+	private static function get_block_length( $block ) {
+		$block_content = self::get_block_content( $block );
+		return strlen( wp_strip_all_tags( $block_content ) );
+	}
+
 	/**
 	 * Insert popups in a post content.
 	 *
@@ -349,8 +361,7 @@ function ( $block_groups, $block ) use ( &$block_index, $parsed_blocks, $max_ind
 				// Give length-ignored blocks a length of 1 so that prompts at 0% can still be inserted before them.
 				$total_length++;
 			} else {
-				$block_content = self::get_block_content( $block );
-				$total_length += strlen( wp_strip_all_tags( $block_content ) );
+				$total_length += self::get_block_length( $block );
 			}
 		}
 
@@ -385,7 +396,7 @@ function ( $block_groups, $block ) use ( &$block_index, $parsed_blocks, $max_ind
 					// Give length-ignored blocks a length of 1 so that prompts at 0% can still be inserted before them.
 					$pos++;
 				} else {
-					$pos += strlen( wp_strip_all_tags( $block['innerHTML'] ) );
+					$pos += self::get_block_length( $block );
 				}
 			}