480 lines
16 KiB
PHP
Executable File
480 lines
16 KiB
PHP
Executable File
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<?php
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Header('Content:text/html;charset=utf-8');
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?>
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<meta name="viewport" content="width=device-width,initial-scale=1" />
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<style>
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body,ol,ul,li,img,p{
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padding:0;
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margin:0;
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border:none;
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}
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li{
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list-style-type: square;
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padding:2px;
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}
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h1,h2,h3,h4,h5,h6{
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margin:10px 0 0 0;
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}
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h1,h2,h3{
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border-bottom:solid 1px #ddd;
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}
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h1{
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padding-bottom:12px;
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}
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h2{
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padding-bottom: 6px;
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}
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h3{
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padding-bottom: 2px;
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}
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body,ul{
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padding:10px 20px;
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}
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body{
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max-width:1024px;
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margin:0 auto;
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}
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blockquote{
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border-left:solid 4px #bbb;
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background-color:#eee;
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min-height:24px;
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line-height:24px;
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padding:0px 10px;
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margin:0;
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color:#333;
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font-size:12px;
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font-style: italic;
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font-family: consolas,楷体;
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}
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table{
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width:100%;
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}
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table,td,th{
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border:solid 1px #ddd;
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border-collapse: collapse;
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padding:10px;
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font-family: consolas;
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font-size:14px;
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}
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table{
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margin:10px 0;
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text-align:center;
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}
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.table-left{
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text-align:left;
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}
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.table-center{
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text-align: center;
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}
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.table-right{
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text-align: right;
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}
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tr:nth-child(even){
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background-color:#eee;
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}
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code,pre{
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border-radius:5px;
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border:solid 1px #eee;
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background-color:#f9f9f9;
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font-family: consolas;
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font-size:14px;
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box-shadow: 1px 2px 3px #ddd;
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}
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code{
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padding:2px 12px;
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display: inline-block;
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margin:10px 0;
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}
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pre{
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padding:10px 12px;
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overflow-x:auto;
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}
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</style>
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<?php
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/*
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* flag规则:
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* h1-h6 标题
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* u1,u2 无序列表
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* ol 有序列表
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* p 普通文本
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* code 代码
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* table 文本
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* check 选择
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* uncheck 未选择
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* quote 引用
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* img 图片
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* url 网址
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* bold 加粗
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* italia 斜体
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* el 空行
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*
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* idel 闲置
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*/
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class MD{
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private $file; //当前文件
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private $mdGen; //生成器
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private $flag; //当前标志
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private $flag_pre; //上一次的flag
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private $flag_like; //假定类型
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private $line_count; //总行数
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private $lines; //所有行
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private $buf; //缓存行
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public function __construct($filename){
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$this->file = $filename; //设置当前文件
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$this->mdGen = $this->content($filename); //获取生成器
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$this->flag = 'idel'; //闲置
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$this->lines = array(); //所有行状态
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$this->line_count = 0; //行数归0
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}
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private function content($file){ //获取生成器
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if(file_exists($file)){
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$fh = fopen($file,"r");
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while(!feof($fh)){
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yield fgets($fh);
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}
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fclose($fh);
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}else{
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return null;
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}
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}
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//遍历每一个字符
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private function every($str){
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$l = strlen($str);
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for($i=0;$i<$l;$i++)
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if(ord($str[$i])<0x80)
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yield $str[$i];
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else{
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yield $str[$i].$str[$i+1].$str[$i+2]; //三个字节
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$i+=2;
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}
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}
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//解析
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private function parse(){
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$ctnt = $this->mdGen; //生成器
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$ret=array();
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if($ctnt != null){
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$ret = array();
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foreach($ctnt as $line){
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if($this->flag != 'code')
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$line=ltrim($line); //删除左边
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if(strlen($line)){
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$ch = $line[0]; //判断第一个字符
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$type=ctype_punct($ch);//标点符号
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if($this->flag !== 'code') $line=preg_replace('/\s{2,}$/','<br>',$line); //非代码模式
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$ret[] = $this->parseLine($line,$type); //解析行
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}else{ //空行
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switch($this->flag){
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case 'ul':
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case 'ol':
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$ret[]="</$this->flag>";
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$this->flag_pre = $this->flag;
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$this->flag = 'idel';
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break;
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case 'table':
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$this->flag = 'idel';
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$ret[]='</table>';
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break;
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default:
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if($this->flag != 'el') $ret[] = '<br>';
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$this->flag = 'el'; //空行
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}
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}
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}
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}
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$this->lines = $ret;
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return $ret;
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}
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//生成blockquote
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private function genQuote($level,$content){
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if($level<=0) return "";
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return str_repeat('<blockquote>',$level).$content.str_repeat('</blockquote>',$level);
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}
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//检查是否处于某个状态,默认检查是否处于代码状态
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private function check($value='code'){
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return ($this->flag == $value);
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}
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/**
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* 生成一行新的表格列
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* $data:需要输入的数据
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* $type:生成类型
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* $wrap:最快层包裹
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* $sep:分隔符
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*/
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private function genRow($data,$type='td',$wrap='tr',$sep='|'){
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$ret='';
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$mat = explode($sep,$data);
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foreach($mat as $elem)
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$ret.="<$type>".$elem."</$type>";
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return "<$wrap>".$ret."</$wrap>";
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}
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/**
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* 解析行内元素
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* bold,italic,code,link,pic
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*/
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private function parseInner($str){
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$str=preg_replace('/\*\*\*([^\*\n\r]+)\*\*\*/','<b><i>\1</i></b>',$str); //加粗并加斜字体
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$str=preg_replace('/\*\*([^\*\n\r]+)\*\*/','<b>\1</b>',$str); //加粗字体
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$str=preg_replace('/\*([^\*\n\r]+)\*/','<i>\1</i>',$str); //斜体
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$str=preg_replace('/```([^`\n\r]+)```/','<code>\1</code>',$str); //代码
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$str=preg_replace('/`([^`\n\r]+)`/','<code>\1</code>',$str); //代码
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$str=preg_replace('/!\[([^\]\r\n]+)\]\(([^\)\r\n]+)\)/','<img src="\2" alt="\1" title="\1">',$str); //图片
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$str=preg_replace('/\[([^\]\r\n]+)\]\(([^\)\r\n]+)\)/','<a href="\2">\1</a>',$str); //图片
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return $str;
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}
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/**
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* 按照给定规则解析字符串:
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* type:
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* true 符号
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* false 文字
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* 返回:
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* array('type'=>类型,'parts'=>array(...))
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*/
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private function parseLine($str,$type){
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if(strlen($str) == 0){
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return array('type'=>'p','parts'=>[]); //返回空段
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}
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$valid_str = rtrim($str); //去除右边的空格
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$str = $valid_str;
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$output = ''; //需要输出的字符串
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if($type == true){ //标点
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$type_str = ''; //类型字符串
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$data_str = '';
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$flag = 0;
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foreach($this->every($str) as $ch){
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if(!ctype_punct($ch)){
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$flag = 1;
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}
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if($flag == 0)
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$type_str .= $ch;
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else
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$data_str .= $ch;
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}
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switch($type_str){
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case '#':
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$wrap = 'h1';
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$this->flag_like = 'h1';
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break;
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case '##':
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$wrap = 'h2';
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$this->flag_like = 'h2';
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break;
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case '###':
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$wrap = 'h3';
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$this->flag_like = 'h3';
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break;
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case '####':
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$wrap = 'h4';
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$this->flag_like = 'h4';
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break;
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case '#####':
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$wrap = 'h5';
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$this->flag_like = 'h5';
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break;
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case '######':
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$wrap = 'h6';
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$this->flag_like = 'h6';
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break;
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case '+':
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case '-':
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$wrap = 'li';
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$this->flag_like = 'ul';
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if($this->flag != 'code'){
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if($this->flag != 'ul'){
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$this->flag_pre = $this->flag;
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$this->flag = 'ul';
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$output.='<ul>';
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}
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}
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break;
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case '```': //代码模式,不进行干扰
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if($this->flag != 'code'){ //不为code,判断是否为单行代码
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$output.='<pre>';
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if(preg_match('/^\s*```([^`]+)```([^\s]+)\s*$/',$str,$mat)){ //单行代码
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$output.="$mat[1]</pre>$mat[2]";
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$str = '';
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$data_str = '';
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}else{
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$this->flag_pre = $this->flag;
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$this->flag = 'code'; //代码
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}
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}else{
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$output.='</pre>';
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$this->flag_pre = $this->flag;
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$this->flag = 'idel'; //闲置
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}
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break;
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case '[':
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if(preg_match('/^\[\s\]\s*(.+)$/',$str,$mat)){ //选择
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$output.="<label><input type='checkbox' disabled> $mat[1]</label><br>";
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$this->flag_like = 'check';
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}else if(preg_match('/^\[([^\]]+)\]\(([^\)]+)\)([^\s]+)\s*$/',$str,$mat)){ //未选择
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$output.="<a href='$mat[2]'>$mat[1]</a>".$this->parseInner($mat[3]);
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$this->flag_like = 'a'; //网址
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}else if(preg_match('/^\s*(\[\d+\]\:)\s+([^\s]+)\s+([^\r\n]+)\s*$/',$str,$mat)){ //外部资料
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$output.="$mat[1] <a href='$mat[2]'>$mat[3]</a>";
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}else{
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$output.=$str;
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}
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break;
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case '[-]':
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$output.="<label><input type='checkbox' checked disabled>$data_str</label><br>";
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$this->flag_like = 'check';
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break;
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case '![':
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if(preg_match('/^!\[([^\]]+)\]\(([^\)]+)\)([^\s]+)\s*$/',$str,$mat)){
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$output.="<img src='$mat[2]' alt='$mat[1]'>".$this->parseInner($mat[3]);
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$this->flag_like = 'img';
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}else{
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$this->flag_like = 'p'; //没有模式
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$output.="$str";
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}
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break;
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case '*': //斜体
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if(preg_match('/^\*(.*)\*([^\s]+)\s*$/',$str,$mat)){
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$output.=$this->parseInner($str);
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$this->flag_like = 'i';
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}else if(preg_match('/^\s*\*\s+(.+)\s*$/',$str,$mat)){
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$str=$mat[1];
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$wrap = 'li';
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$this->flag_like = 'ul';
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if($this->flag != 'code'){
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if($this->flag != 'ul'){
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$this->flag_pre = $this->flag;
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$this->flag = 'ul';
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$output.='<ul>';
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}
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}
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}
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break;
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case '**': //粗体
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if(preg_match('/^\*\*(.*)\*\*/',$str,$mat)){
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$output.=$this->parseInner($str);
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$this->flag_like = 'b';
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}
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break;
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case '<':
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$output.=$str;
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$this->flag_like = 'html';
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break;
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default:
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if(!$this->check()){ //非代码模式
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if(preg_match('/^>+$/',$type_str)){ //引用
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$level = strlen($type_str);
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$this->flag_like = 'quote';
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$output.=$this->genQuote($level,$data_str); //引用
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}else if(preg_match('/^([^\|\n\r]+)(?:\|[^\|\n\r]+)+$/',$str)){ //表格确定格式---|---|....
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if($this->flag == 'table'){
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$this->flag_like = 'table';
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$output.='<table><thead>'.$this->genRow($this->buf,'th').'</thead><tbody>';
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}else{ //非表格格式,上一行没有标题
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$this->flag_like = 'p'; //没有格式
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$output.=$this->buf;
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$this->buf = '';
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}
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}else if(preg_match('/^\s*(\-{3,})|(\={3,})$/',$type_str)){ //hr
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$output.='<hr>';
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$this->flag_like = 'hr';
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break;
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}else{
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$this->flag_like = 'p';
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$output.=$str.'<br>';
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}
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}
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}
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$br = '';
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preg_match('/^(.*)(<br\s*\/?>)?$/',$data_str,$mat);
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$data_str = htmlspecialchars($mat[1]);
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if(!$this->check()){ //代码
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if(!empty($wrap)) $output.="<$wrap>$mat[1]</$wrap>".(isset($mat[2])?'<br>':'');
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}else if($type_str!='```'){
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$output.=htmlspecialchars($str).'<br>';
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}
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}else{ //首个非空字符不为符号
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if($this->flag == 'code'){ //代码,直接输出
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$str=str_replace("\t",' ',$str);
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$output.=htmlspecialchars($str).'<br>';
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}else if(is_numeric($str[0])){ //可能为有序列表,也可能是表格
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if(preg_match('/^\s*\d+\.\s+([^\r\n]+)\s*$/',$str)){ //有序列表
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$this->flag_like = 'ol';
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$output.=$str;
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}else{
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$this->flag_like = 'idel';
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foreach($this->every($str) as $ch){
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$output.=$ch;
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}
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}
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$output.='<br>';
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}else if(preg_match('/^([^\|\n\r]+)(?:\|[^\|\n\r]+)+$/',$str)){ //表格
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$mat = explode('|',$str);
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if($this->flag!='table'){ //进入表格
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$this->buf = $str;
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$this->flag_like = 'table';
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$wrap = '';
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}else{
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$output.=$this->genRow($str);
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}
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//echo $mat[0].'<br>';
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//var_dump($mat);
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}else{ //其他
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$this->flag = 'p';
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$output.=$str;
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}
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}
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if(!$this->check()){ //不为代码,设置flag
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$this->flag_pre = $this->flag;
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$this->flag = $this->flag_like;
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if($this->flag_pre == 'table' && $this->flag != 'table')
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$output='</table>'.$output;
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else if($this->flag_pre == 'ul' && $this->flag != 'ul'){
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$output='</ul>'.$output;
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}
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}
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return $this->parseInner($output); //输出需要输出的内容
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}
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//获取输出内容
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public function output(){
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$this->parse();
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echo implode('',$this->lines);
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}
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}
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