Add upstream

wp-content/plugins/jetpack/modules/theme-tools/content-options/featured-images-fallback.php

@@ -0,0 +1,161 @@
+<?php
+/**
+ * Get one image from a specified post in the following order:
+ * Featured Image then first image from the_content HTML
+ * and filter the post_thumbnail_html
+ *
+ * @param string       $html              The HTML for the image markup.
+ * @param int          $post_id           The post ID to check.
+ * @param int          $post_thumbnail_id The ID of the featured image.
+ * @param string       $size              The image size to return, defaults to 'post-thumbnail'.
+ * @param string|array $attr              Optional. Query string or array of attributes.
+ *
+ * @return string      $html              Thumbnail image with markup.
+ */
+function jetpack_featured_images_fallback_get_image( $html, $post_id, $post_thumbnail_id, $size, $attr ) {
+	$opts = jetpack_featured_images_get_settings();
+
+	if ( ! empty( $html ) || (bool) 1 !== (bool) $opts['fallback-option'] ) {
+		return trim( $html );
+	}
+
+	if ( jetpack_featured_images_should_load() ) {
+		if (
+			( true === $opts['archive'] && ( is_home() || is_archive() || is_search() ) && ! $opts['archive-option'] )
+			|| ( true === $opts['post'] && is_single() && ! $opts['post-option'] )
+			|| ! $opts['fallback-option']
+		) {
+			return trim( $html );
+		}
+	}
+
+	if ( class_exists( 'Jetpack_PostImages' ) ) {
+		global $_wp_additional_image_sizes;
+
+		$args = array(
+			'from_thumbnail'  => false,
+			'from_slideshow'  => true,
+			'from_gallery'    => true,
+			'from_attachment' => false,
+		);
+
+		$image = Jetpack_PostImages::get_image( $post_id, $args );
+
+		if ( ! empty( $image ) ) {
+			$image['width']  = '';
+			$image['height'] = '';
+			$image['crop']   = '';
+
+			if ( array_key_exists( $size, $_wp_additional_image_sizes ) ) {
+				$image['width']  = $_wp_additional_image_sizes[ $size ]['width'];
+				$image['height'] = $_wp_additional_image_sizes[ $size ]['height'];
+				$image['crop']   = $_wp_additional_image_sizes[ $size ]['crop'];
+			}
+
+			$image_src = Jetpack_PostImages::fit_image_url( $image['src'], $image['width'], $image['height'] );
+
+			// Use the theme's crop setting rather than forcing to true
+			$image_src = add_query_arg( 'crop', $image['crop'], $image_src );
+
+			$html = '<img src="' . esc_url( $image_src ) . '" title="' . esc_attr( strip_tags( get_the_title() ) ) . '" class="attachment-' . esc_attr( $size ) . ' wp-post-image" />';
+
+			return trim( $html );
+		}
+	}
+
+	return trim( $html );
+}
+add_filter( 'post_thumbnail_html', 'jetpack_featured_images_fallback_get_image', 10, 5 );
+
+/**
+ * Get URL of one image from a specified post in the following order:
+ * Featured Image then first image from the_content HTML
+ *
+ * @param int    $post_id           The post ID to check.
+ * @param int    $post_thumbnail_id The ID of the featured image.
+ * @param string $size              The image size to return, defaults to 'post-thumbnail'.
+ *
+ * @return string|null $image_src         The URL of the thumbnail image.
+ */
+function jetpack_featured_images_fallback_get_image_src( $post_id, $post_thumbnail_id, $size ) {
+	$image_src = wp_get_attachment_image_src( $post_thumbnail_id, $size );
+	$image_src = ( ! empty( $image_src[0] ) ) ? $image_src[0] : null;
+	$opts      = jetpack_featured_images_get_settings();
+
+	if ( ! empty( $image_src ) || (bool) 1 !== (bool) $opts['fallback-option'] ) {
+		return esc_url( $image_src );
+	}
+
+	if ( jetpack_featured_images_should_load() ) {
+		if ( ( true === $opts['archive'] && ( is_home() || is_archive() || is_search() ) && ! $opts['archive-option'] )
+			|| ( true === $opts['post'] && is_single() && ! $opts['post-option'] ) ) {
+				return esc_url( $image_src );
+		}
+	}
+
+	if ( class_exists( 'Jetpack_PostImages' ) ) {
+		global $_wp_additional_image_sizes;
+
+		$args = array(
+			'from_thumbnail'  => false,
+			'from_slideshow'  => true,
+			'from_gallery'    => true,
+			'from_attachment' => false,
+		);
+
+		$image = Jetpack_PostImages::get_image( $post_id, $args );
+
+		if ( ! empty( $image ) ) {
+			$image['width']  = '';
+			$image['height'] = '';
+			$image['crop']   = '';
+
+			if ( array_key_exists( $size, $_wp_additional_image_sizes ) ) {
+				$image['width']  = $_wp_additional_image_sizes[ $size ]['width'];
+				$image['height'] = $_wp_additional_image_sizes[ $size ]['height'];
+				$image['crop']   = $_wp_additional_image_sizes[ $size ]['crop'];
+			}
+
+			$image_src = Jetpack_PostImages::fit_image_url( $image['src'], $image['width'], $image['height'] );
+
+			// Use the theme's crop setting rather than forcing to true
+			$image_src = add_query_arg( 'crop', $image['crop'], $image_src );
+
+			return esc_url( $image_src );
+		}
+	}
+
+	return esc_url( $image_src );
+}
+
+/**
+ * Check if post has an image attached, including a fallback.
+ *
+ * @param  int $post The post ID to check.
+ *
+ * @return bool
+ */
+function jetpack_has_featured_image( $post = null ) {
+	return (bool) get_the_post_thumbnail( $post );
+}
+
+/**
+ * Adds custom class to the array of post classes.
+ *
+ * @param array $classes Classes for the post element.
+ * @param array $class   Optional. Comma separated list of additional classes.
+ * @param array $post_id Unique The post ID to check
+ *
+ * @return array $classes
+ */
+function jetpack_featured_images_post_class( $classes, $class, $post_id ) {
+	$post_password_required = post_password_required( $post_id );
+	$opts                   = jetpack_featured_images_get_settings();
+
+	if ( jetpack_has_featured_image( $post_id ) && (bool) 1 === (bool) $opts['fallback-option'] && ! is_attachment() && ! $post_password_required && 'post' === get_post_type() ) {
+		$classes[] = 'has-post-thumbnail';
+	}
+
+	return $classes;
+}
+add_filter( 'post_class', 'jetpack_featured_images_post_class', 10, 3 );