jQuery + Php 实现类似 Medium 的文章页内容批注评论功能

还没时间做 WordPress 插件…

背景

偶然的机会，在准备做小半谈否 API 的时候，正在寻找用户人群时看到了利器 (liqi.io) 网站

他们使用了一款 2015 年 (貌似是) 由一个国外开发者做的句子标记插件，实现了文章中点击句子即可标记并评论的功能

同样的 Medium 也有句子标记功能，还是蛮有用的

增加了互动，访客也能参与其中…

代码

没有来得及整理，先贴代码

// 内容数据都保存在当前文章自定义字段
$stream_ids = get_post_meta($post->ID,'stream_ids',true);
$stream_contents = get_post_meta($post->ID,'stream_contents',true);
$stream_users = get_post_meta($post->ID,'stream_users',true);

$stream_users = explode('######',$stream_users);
$stream_ids = explode('######',$stream_ids);
$stream_contents = explode('######',$stream_contents);

$count1 = count($stream_ids);
$count2 = count($stream_contents);
$count3 = count($stream_users);

↑ 文章页头部获取标记内容

<?php

 if(wp_is_mobile()) {$is_wap = 1;}
 global $current_user;
 $user_id = $current_user -> ID;
 if(empty($user_id)){$login = 0;}else{$login = 1;}

?>
<div class="new-single-comment-fixed" id="comment_fixed" style="<?php if(!empty($stream_contents[0]) && !$is_wap) echo'display:unset'?>">
        <?php if($login){ ?>
        <input type="text" name="mark_comment" value="请输入批注，按下 Enter 发送" id="mark_comment" style="display:none">
        <?php } ?>
        <div style="text-align: right;font-size: 1.4rem;padding-bottom: 10px;padding-right: 15px;display:none;" id="comment_btn">
    <button style="background: #444;color: #fff;padding: 3px 20px;border-radius: 2px;" id="send_comment"> 确定 </button>
    <button style="background: #eee;padding: 3px 20px;border-radius: 2px;margin-left: 10px;" id="cancel_comment"> 取消 </button>
    </div>
    <div class="new-single-comment-div-list" style="<?php if(empty($stream_contents[0])) echo'display:none'?>">
 
<?php
    
    if($count1 == $count2 && $count2 == $count3){for($i=0;$i<$count3;$i++){ ?>

<div class="new-single-comment-div hover-mark-content" style="<?php if($count3 == 1 && $i == 0) echo'margin-bottom: 0px;'; else echo'margin-bottom: 20px;'; ?>" id="<?php echo $stream_ids[$i]; ?>">
        <h4><?php echo get_avatar($stream_users[$i],96,'','user-avatar',array('width'=>120,'height'=>120,'rating'=>'X','class'=>array('new-single-comment-img'),'extra_attr'=>'title="user-avatar"','scheme'=>'https') ); ?><?php echo get_user_by('id',$stream_users[$i])->display_name; ?></h4>
        <span class="new-single-comment-p"><?php echo $stream_contents[$i]; ?></span>
    </div>
    

<?php }} ?>
</div>
    </div>

↑ 文章页展示评论区块

<script>

    $(function(){var len = $('.new-single-content-pad p').length; // 获取元素个数
        for(var i = 1;i<len;i++){ // 顺序操作
            $('.new-single-content-pad p:eq('+i+')').attr('id','stream'+i); // 更改 id 为顺序数字
            $('.new-single-content-pad p:eq('+i+')').attr('onclick','add_comment('+i+');'); // 更改 id 为顺序数字
        }
});

$(".new-single-content-pad p").hover(function(){$(this).eq(0).css({'text-decoration':'underline dashed rgb(253, 188, 1)'});
},function(){$(this).eq(0).css({'text-decoration':'none'});
});


$(".hover-mark-content").hover(function(){var co_id = $(this).eq(0).attr('id');
    $('#stream'+co_id).attr('style','background: rgba(253, 188, 1, 0.18); !important');
    $('#stream'+(co_id - 1))[0].scrollIntoView();},function(){var co_id = $(this).eq(0).attr('id');
    $('#stream'+co_id).attr('style','background: none; !important');
});

$(".new-single-comment-fixed input").focus(function(){if($('#mark_comment').val()=='请输入批注，按下 Enter 发送'){$('#mark_comment').val('');
    }
});
$(".new-single-comment-fixed input").blur(function(){if($('#mark_comment').val()==''){$('#mark_comment').val('请输入批注，按下 Enter 发送');
    }
});
$(".new-single-comment-fixed input").keydown(function(){$('#comment_btn').css('display','block');
});

var last_p_id = 'none';
var add_comment = function(id){if(last_p_id !== 'none'){if(last_p_id !== id){$('#stream'+last_p_id).attr('class','');
            last_p_id = id;
        }
    }else{last_p_id = id;}
    
    $('#mark_comment').css('display','unset');
    $('#stream'+id).attr('class','new-p-under');
    $('#comment_fixed').css('display','unset');
    $('#mark_comment').css({'border-width':'0px','box-shadow':'inset 0 -55px rgb(253, 188, 1)','color':'rgb(255, 255, 255)','font-weight':'600'});
    setTimeout("$('#mark_comment').css({'border-width':'5px','box-shadow':'inset 0 0px rgb(253, 188, 1)','color':'rgb(102, 102, 102)','font-weight':'400'});",500);
    $('#cancel_comment').attr('onclick','close_mark_comment('+id+');');
    $('#send_comment').attr('onclick','send_mark_comment('+id+');');
}

var close_mark_comment = function(id){$('#mark_comment').val('请输入批注，按下 Enter 发送');
    $('#comment_fixed').css('display','none');
    $('#stream'+id).attr('class','');
    $('#comment_btn').css('display','none');
}
<?php if($login){ ?>
var send_mark_comment = function(id){var content = $('#mark_comment').val();
    var post_id = <?php echo $post->ID; ?>;
    var user_id = <?php echo $user_id; ?>;
    var stream_id = id;
    
    if(content.indexOf("######") >= 0 || content == ''){alert('批注内容为空');
    }else{var formdata = new FormData();
        formdata.append('content',content);
        formdata.append('post_id',post_id);
        formdata.append('user_id',user_id);
        formdata.append('stream_id',stream_id);
        
    $.ajax({
        url: '?action=send_post_mark_comment', // 此处 action 需在后台注册钩子
        type: "POST",
        data: formdata,
        cache: false,
        dataType: 'json',
        processData: false,
        contentType: false,
        success: function(data) {if(data.stats == '1'){setTimeout('location.reload();',500);
            }else{alert('系统错误');
            }
        },
        error: function(data){alert('系统错误');
        }
    });
    }
}
<?php } ?>

$("#mark_comment").bind("keydown", function(e) {
        // 兼容 FF 和 IE 和 Opera    
        var theEvent = e || window.event;
        var code = theEvent.keyCode || theEvent.which || theEvent.charCode;
        if (code == 13){$('#send_comment').click();}
    });
</script>

↑ 文章页核心功能 jQuery 代码

<script>
$(function(){
    
<?php
    
    if($count1 == $count2){for($i=0;$i<$count1;$i++){ ?>
        
            $('#stream<?php echo $stream_ids[$i]; ?>').attr('class','new-p-undered');
            $('#stream<?php echo $stream_ids[$i]; ?>').html($('#stream<?php echo $stream_ids[$i]; ?>').html()+'<button class="underline-ps"co="<?php echo $stream_ids[$i]; ?>">PS</button>');
            
<?php }} ?>

$(".underline-ps").hover(function(){var coo_id = $(this).eq(0).attr('co');
    console.log(coo_id);
    $('#'+coo_id).css({'background':'#f7f8f9','padding':'5px 20px 5px 20px'});
},function(){var coo_id = $(this).eq(0).attr('co');
    $('#'+coo_id).css({'background':'#fff','padding':'0px 20px 0px 20px'});
});
    });

</script>

↑ 文章页处理标记内容 jQuery 代码

function send_post_mark_comment() {if(!empty($_POST['content']) && !empty($_POST['post_id']) && !empty($_POST['user_id']) && !empty($_POST['stream_id'])) {$content = addslashes($_POST['content']);
 $post_id = (int)$_POST['post_id'];
 $user_id = (int)$_POST['user_id'];
 $stream_id = (int)$_POST['stream_id'];
 
 if(get_post_status($post_id) !== false){$old_ids = get_post_meta($post_id,'stream_ids',true);
     $old_contents = get_post_meta($post_id,'stream_contents',true);
     $old_users = get_post_meta($post_id,'stream_users',true);
     if(!empty($old_ids) && !empty($old_contents)){$status = update_post_meta($post_id,'stream_ids',$old_ids.'######'.$stream_id);
        $status = update_post_meta($post_id,'stream_users',$old_users.'######'.$user_id);
        $status = update_post_meta($post_id,'stream_contents',$old_contents.'######'.$content);
     }else{$status = update_post_meta($post_id,'stream_ids',$stream_id);
        $status = update_post_meta($post_id,'stream_users',$user_id);
        $status = update_post_meta($post_id,'stream_contents',$content);
     }
     if($status !== false){echo json_encode(array('stats'=>'1'));
     }else{echo json_encode(array('stats'=>'0'));
     }
 }else{echo json_encode(array('stats'=>'0'));
 }
 
 
 die();}
}
// 将接口加到 init 中
add_action('init', 'send_post_mark_comment');

↑ 提交评论 action 函数

.new-single-comment-btn{
    float: right !important;
    border: 2px solid #959da5 !important;
    background-color: #fff !important;
    box-shadow: none !important;
    border-radius: 5px !important;
    padding: 12px 12px 11px 15px !important;
    text-align: center !important;
    text-shadow: none !important;
    color: #959da5 !important;
    margin: 0px !important;
    margin-top: -5px !important;
}


.new-single-comment-avatar{
    width: 40px;
    height: 40px;
    margin-left: -2px;
    margin-right: 13px;
    border-radius: 50%;
}

.new-single-div-author{
    position: absolute;
    right: 0px;
    top: -54px;
    padding: 6px 20px;
    font-family: sans-serif;
    font-size: 1.8rem;
    border-radius: 50px;
    box-shadow: 0 0.125rem 0.75rem 0 rgba(0,0,0,.08);
}

.new-p-under{text-decoration: underline dashed rgb(253, 188, 1) !important;
}

.new-p-undered{text-decoration: underline dashed rgb(253, 188, 1) !important;
}

.new-single-comment-fixed{
    display: none;
    position: fixed;
    box-shadow: 0 1px 4px rgba(0,0,0,.2);
    border: none;
    transform: translateX(820px);
    margin-top: 22.1vh;
    width: 35vh;
    top: 0px;
    background: rgb(255, 255, 255);
}

.new-single-comment-fixed input{border: none;font-size: 1.4rem;font-weight: 400;font-family: sans-serif;color: #666;height: 55px;padding-left: 20px;    border-left: 5px solid rgb(253, 188, 1);
}

.new-single-comment-p{
    font-size: 1.2rem !important;
    margin: 5px 0 !important;
    color: #888;
    text-decoration: none !important;
}

.new-single-comment-img{
    width: 28px !important;
    min-width: 28px !important;
    height: 28px !important;
    margin: 0px !important;
    display: inline-block !important;
    border-radius: 50% !important;
    margin-right: 7px !important;
    margin-left: -5px !important;
    margin-top: -4px !important;
}

.underline-ps{background: rgb(252, 188, 1);
    color: rgb(255, 255, 255);
    font-style: normal;
    font-size: 1rem;
    padding: 1px 10px;
    font-weight: 600;
    border-radius: 5px;
    margin-left: 5px;
}

.new-single-comment-div{
    padding: 0px 20px 0px 20px;
    border-left: 5px solid rgb(238, 238, 238);
    transition: ease-in-out .2s;
}

.new-single-comment-div h4{
    font-weight: 600;
    font-size: 1.9rem;
    color: #666;
    margin-bottom: 3px;
}


.new-single-comment-div-list{
    padding: 10px 0px;
    padding-left: 0px;
    border-top: 1px solid #eee;
    max-height: 50vh;
    overflow: hidden;
    overflow-y: auto;
    transition: ease-in-out .2s;
}

.new-cap-tags{margin-top: -20px;}

.new-cap-tags a{
    position: relative;
    display: inline-block;
    height: 30px;
    padding: 0 15px;
    font-size: 1.7rem;
    line-height: 30px;
    color: rgb(0, 132, 255) !important;
    vertical-align: top;
    border-radius: 100px;
    background: rgba(0, 132, 255, 0.1);
}

.new-single-comment-fixed-cap{box-shadow: 0 1px 4px rgba(0,0,0,.2);
    border: none;
    background: rgb(255, 255, 255);
    transform: none !important;
    display: block !important;
    margin-top: 30px !important;
    margin-left: 44px !important;
    width: 100%;
    position: relative;
}

↑ CSS 部分

截图

后记

大概还不准备放在 Tony 主题 里 (感觉没啥必要)
之后可能会做成 WordPress 插件 2333