关闭缩略图功能和调整Wpjam插件

Author： Rui
发布时间：March 2, 2019
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One comment
3835 words
Categories：技术

虽然本博客是Typecho的，但是还运营着一个wordpress的，也用着水煮鱼的七牛插件。

!> 新的Wpjam上来直接把缩略图功能给毙了，如有还想用这个插件的CDN功能，就要自己修改主题，用七牛的自动裁剪功能，但是又要修改主题，所以有点麻烦。

主题-functions.php文件下，注释掉一些内容，主要是去掉主题自行裁剪缩略图的功能。

add_theme_support( 'post-thumbnails' );

// Post thumbnails
	//set_post_thumbnail_size( 820, 312, true );
	// Hero Image on the front page template
	//add_image_size( 'sela-hero-thumbnail', 1180, 610, true );
	// Full width and grid page template
	//add_image_size( 'sela-page-thumbnail', 1180, 435, true );
	// Grid child page thumbnail
	//add_image_size( 'sela-grid-thumbnail', 360, 242, true );
	// Testimonial thumbnail
	//add_image_size( 'sela-testimonial-thumbnail', 90, 90, true );

wpjam-basic\admin\hooks\custom.php，注释一下内容：（在最后）

!> Wpjam直接把所有学缩略图功能全部给屏蔽了，这就导致要自己去后台替换主题的插件，不免有些太暴力，所以把这个功能关闭。

add_action('wp_loaded', function (){
    	if(CDN_NAME == '')
    		return;
    
    	add_filter('pre_option_thumbnail_size_w',	'__return_zero');
    	add_filter('pre_option_thumbnail_size_h',	'__return_zero');
    	add_filter('pre_option_medium_size_w',		'__return_zero');
    	add_filter('pre_option_medium_size_h',		'__return_zero');
    	add_filter('pre_option_large_size_w',		'__return_zero');
    	add_filter('pre_option_large_size_h',		'__return_zero');
    
    	add_filter('intermediate_image_sizes_advanced', function($sizes){
    		if(isset($sizes['full'])){
    			return ['full'=>$sizes['full']];
    		}else{
    			return [];
    		}
    	});
    
    	add_filter('image_size_names_choose', function($sizes){
    		if(isset($sizes['full'])){
    			return ['full'=>$sizes['full']];
    		}else{
    			return [];
    		}
    	});
    
    	add_filter('upload_dir', function($uploads){
    		$uploads['url']		= wpjam_get_thumbnail($uploads['url']);
    		$uploads['baseurl']	= wpjam_get_thumbnail($uploads['baseurl']);
    		return $uploads;
    	});
    
    	add_filter('wp_calculate_image_srcset_meta', '__return_empty_array');
    
    	// add_filter('image_downsize', '__return_true');
    	add_filter('wp_get_attachment_image_src', function($image, $attachment_id, $size, $icon){
    		return  wpjam_get_attachment_image_src($attachment_id, $size);
    	}, 10 ,4);
    
    	add_filter('wp_prepare_attachment_for_js', function($response, $attachment, $meta){
    		if(isset($response['sizes'])){
    			$orientation	= $response['sizes']['full']['orientation'];
    
    			foreach (array('thumbnail', 'medium', 'medium_large', 'large') as $s) {
    				$image_src = wpjam_get_attachment_image_src($attachment->ID, $s);
    
    				$response['sizes'][$s]	= array(
    					'url'			=> $image_src[0],
    					'width'			=> $image_src[1],
    					'height'		=> $image_src[2],
    					'orientation'	=> $orientation
    				);
    			}
    		}
    
    		return $response;
    	}, 10, 3);
    }, 11);

!> 另外这次把媒体菜单都给影藏了，wpjam-basic\admin\hooks\admin-menus.php中注释掉一下部分找回：

if(CDN_NAME){
      		remove_submenu_page('options-general.php', 'options-media.php');
      	}

!> 还有一个问题，就是作者为了考虑高清屏幕，硬性设置了两倍的缩略图比例。

在wpjam-basic/public/wpjam-cdn.php中两处$retina=2改为$retina=1

i> 之后就是修改主题，主题根据情况有很多地方需要修改，其实就替换有关thumbnail的函数。

wpjam_post_thumbnail(array(750,400), $crop=1)替换the_post_thumbnail()

wpjam_get_post_thumbnail($post,array(750,400), $crop=1)替换get_the_post_thumbnail()

<figure class="blog-post-cover">
    			<?php is_single()	
    				//? the_post_thumbnail()
    				?wpjam_post_thumbnail(array(750,400), $crop=1)
    				//: printf( '<a href="%s">%s</a>', get_the_permalink(), get_the_post_thumbnail() ); 
    			     : printf( '<a href="%s">%s</a>', get_the_permalink(), wpjam_get_post_thumbnail($post,array(750,400), $crop=1)); ?>
    		</figure>

Last modification：March 2, 2019