syntax.php

<?php
/**
 * plot-Plugin: Parses plot-blocks
 *
 * @license    MIT
 * @author     Ann He <me@annhe.net>
 */


if(!defined('DOKU_INC')) define('DOKU_INC',realpath(dirname(__FILE__).'/../../').'/');
if(!defined('DOKU_PLUGIN')) define('DOKU_PLUGIN',DOKU_INC.'lib/plugins/');
require_once(DOKU_PLUGIN.'syntax.php');

class syntax_plugin_plot extends DokuWiki_Syntax_Plugin {
    /**
     * What about paragraphs?
     */
    function getPType(){
        return 'normal';
    }

    /**
     * What kind of syntax are we?
     */
    function getType(){
        return 'substition';
    }

    /**
     * Where to sort in?
     */
    function getSort(){
        return 100;
    }

    /**
     * Connect pattern to lexer
     */
    function connectTo($mode) {
        $this->Lexer->addSpecialPattern('<plot.*?>\n.*?\n</plot>',$mode,'plugin_plot');
    }

    /**
     * Handle the match
     */
    function handle($match, $state, $pos, Doku_Handler $handler) {
        $info = $this->getInfo();

        // prepare default data
        $return = array(
                        'layout'    => 'dot',
                        'align'     => 'center',
                        'chof' => 'png',
                        'width' => '',
                        'height' => '',
                       );

        // prepare input
        $lines = explode("\n",$match);
        $conf = array_shift($lines);
        array_pop($lines);

        // match config options
        if(preg_match('/\b(left|center|right)\b/i',$conf,$match)) $return['align'] = $match[1];
        if(preg_match('/\b(\d+)x(\d+)\b/',$conf,$match)){
            $return['width'] = $match[1];
            $return['height'] = $match[2];
        }
        
        if(preg_match('/\bwidth=([0-9]+)\b/i', $conf,$match)) $return['width'] = $match[1];
        if(preg_match('/\bheight=([0-9]+)\b/i', $conf,$match)) $return['height'] = $match[1];
        if(preg_match('/\boutput=([a-z]+)\b/i', $conf,$match)) $return['chof'] = $match[1];

        if(preg_match('/\bplot\s(\w+:?\w+)\b/i',$conf,$match)){
            $isGv = array("dot","neato","twopi","circo","fdp","sfdp");
            $return['layout'] = strtolower($match[1]);
            if(in_array($return['layout'], $isGv)) {
                $return['layout'] = "gv:" . $return['layout'];
            }
        }
        
        $return['input'] = join("\n", $lines);
        // store input for later use
        return $return;
    }

    function cal_file_name($data) {
        $path = rtrim($this->getConf('cdn'),"/") . "/" . "cache/images/";
        $flag = str_replace(":", "_", $data['layout']);
        return $path . md5(str_replace("\n", "\r\n", $data['input'])) . "-" . $flag . "-" . $data['width'] . "x" . $date['height'] . "." . $data['chof'];
    }

    /**
     * Create output
     */
    function render($format, Doku_Renderer $R, $data) {
        $id = $this->getGUID();
        $cht = $data['layout'];
        $center_start = "";
        $center_end = "";

        if($data['align'] == "center") {
            $center_start = '<div align="center" style="text-align: center">';
            $center_end = '</div>';
        }

        $tpl='<div style="display:none" class="zxsq_mindmap_form">' .
            '<form accept-charset="utf-8" name="' . $id . '" id="' . $id . 
            '" method="post" action="' . $this->getConf('api') . '" enctype="application/x-www-form-urlencoded">'.
            '<input type="hidden" name="cht" value="' . $cht . '" id="cht_' . $id . '">' .
            '<input type="hidden" name="chof" value="' . $data['chof'] . '" id="chof_' . $id . '">' .
            '<textarea name="chl" id="chl_' . $id . '">' . $data['input'] . '</textarea></form></div>' .
            $center_start .
            '<img id="img_' . $id . '" src="' . $this->cal_file_name($data) . 
            '" alt="" title="plot"';

        if($format == 'xhtml'){
            $R->doc .= $tpl . ' class="media' . $data['align'] . '"';
            if($data['width'])  $R->doc .= ' width="'.$data['width'].'"';
            if($data['height']) $R->doc .= ' height="'.$data['height'].'"';
            if($data['align'] == 'right') $R->doc .= ' align="right"';
            if($data['align'] == 'left')  $R->doc .= ' align="left"';
            $R->doc .= '/>';
            $R->doc .= $center_end;
            return true;
        }
        return false;
    }

    function getGUID(){  
        $charid = strtoupper(md5(uniqid(rand(), true)));  
        $hyphen = chr(45);// "-"  
        $uuid = "zxsq_mindmap_form-"  
            .substr($charid, 0, 8).$hyphen  
            .substr($charid, 8, 4).$hyphen  
            .substr($charid,12, 4).$hyphen  
            .substr($charid,16, 4).$hyphen  
            .substr($charid,20,12); 
        return $uuid;  
    } 
}