Class for Server-side generation of latex formulas. More...

Collaboration diagram for ilMathJax:

Public Member Functions
	init ($a_purpose=self::PURPOSE_BROWSER)
	Initialize the usage This must be done before any rendering call. More...

	setRendering ($a_rendering)
	Set the image type rendered by the server. More...

	setDpi ($a_dpi)
	Set the dpi of the rendered images. More...

	setZoomFactor ($a_factor)
	Set the zoom factor for images. More...

	includeMathJax ($a_tpl=null)
	Include Mathjax javascript in a template. More...

	insertLatexImages ($a_text, $a_start='[tex]', $a_end='[/tex]', $a_dir=null, $a_path=null)
	Replace tex tags with formula image code New version of ilUtil::insertLatexImages. More...

	getCacheSize ()
	Get the size of the image cache. More...

	clearCache ()
	Clear the cache of rendered graphics. More...

Static Public Member Functions
static	getInstance ()
	Singleton: get instance. More...

Data Fields
const	PURPOSE_BROWSER = 'browser'

const	PURPOSE_EXPORT = 'export'

const	PURPOSE_PDF = 'pdf'

const	PURPOSE_DEFERRED_PDF = 'deferred_pdf'

const	ENGINE_SERVER = 'server'

const	ENGINE_CLIENT = 'client'

const	ENGINE_MIMETEX = 'mimetex'

const	ENGINE_DEFERRED = 'deferred'

const	ENGINE_NONE = 'none'

const	RENDER_SVG_AS_XML_EMBED = 'svg_as_xml_embed'

const	RENDER_SVG_AS_IMG_EMBED = 'svg_as_img_embed'

const	RENDER_SVG_AS_IMG_FILE = 'svg_as_img_file'

const	RENDER_PNG_AS_IMG_EMBED = 'png_as_img_embed'

const	RENDER_PNG_AS_IMG_FILE = 'png_as_img_file'

const	RENDER_PNG_AS_FO_FILE = 'png_as_fo_file'

Protected Member Functions
	__construct ()
	Singleton: protected constructor. More...

	renderMathJax ($a_tex, $a_output_dir=null, $a_image_path=null)
	Render image from tex code using the MathJax server. More...

	renderMimetex ($a_tex, $a_output_dir=null, $a_image_path=null)
	Render image from tex code using mimetex. More...

Protected Attributes
	$settings = null

	$engine = null

	$mathjax_url = ''

	$start_limiter = ''

	$end_limiter = ''

	$server_address = ''

	$server_timeout = 5

	$rendering = self::RENDER_SVG_AS_XML_EMBED

	$output = 'svg'

	$dpi = 150

	$zoom_factor = 1.0

	$mimetex_url = URL_TO_LATEX

	$mimetex_count = 0

	$use_curl = true

	$cache_dir = ''

	$default_options

Static Protected Attributes
static	$_instance = null

Detailed Description

Class for Server-side generation of latex formulas.

Definition at line 9 of file class.ilMathJax.php.

Constructor & Destructor Documentation

◆ __construct()

ilMathJax::__construct ( )

protected

Singleton: protected constructor.

Definition at line 137 of file class.ilMathJax.php.

    {
        // initiate the settings for browser as default
        include_once "./Services/Administration/classes/class.ilSetting.php";
        $this->settings = new ilSetting("MathJax");
        $this->init(self::PURPOSE_BROWSER);
 
        // set the connection method
        $this->use_curl = extension_loaded('cURL');
 
        // set the cache directory
        $this->cache_dir = ilUtil::getWebspaceDir() . '/temp/tex';
    }

References ilUtil\getWebspaceDir(), init(), and settings().

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Member Function Documentation

◆ clearCache()

ilMathJax::clearCache ( )

Clear the cache of rendered graphics.

Definition at line 606 of file class.ilMathJax.php.

    {
        ilUtil::delDir($this->cache_dir);
    }

References ilUtil\delDir().

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◆ getCacheSize()

ilMathJax::getCacheSize ( )

Get the size of the image cache.

Returns: string

Definition at line 582 of file class.ilMathJax.php.

    {
        $cache_dir = realpath($this->cache_dir);
 
        if (!is_dir($cache_dir)) {
            $size = 0;
        } else {
            $size = ilUtil::dirsize($cache_dir);
        }
 
        $type = array("k", "M", "G", "T");
        $size = $size / 1024;
        $counter = 0;
        while ($size >= 1024) {
            $size = $size / 1024;
            $counter++;
        }
 
        return(round($size, 1) . " " . $type[$counter] . "B");
    }

References $cache_dir, $counter, $size, $type, and ilUtil\dirsize().

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◆ getInstance()

static ilMathJax::getInstance ( )

static

Singleton: get instance.

Returns: ilMathJax|null

Definition at line 155 of file class.ilMathJax.php.

    {
        if (self::$_instance === null) {
            self::$_instance = new self;
        }
        return self::$_instance;
    }

References $_instance.

Referenced by ilWikiHTMLExport\buildExportFile(), ilScorm2004Export\buildExportFileHTML(), ilScorm2004Export\buildExportFileHTMLOne(), ilScorm2004Export\buildExportFileISO(), ilScorm2004Export\buildExportFilePDF(), ilScorm2004Export\buildExportFileSCORM(), ilUtil\buildLatexImages(), ilObjExternalToolsSettingsGUI\clearMathJaxCacheObject(), ilCertificate\createPreview(), ilObjExternalToolsSettingsGUI\editMathJaxObject(), ilObjGlossary\exportHTML(), ilObjContentObject\exportHTML(), ilObjBlogGUI\exportHTMLPages(), ilPresentationListTableGUI\fillRow(), ilTermListTableGUI\fillRow(), ilAssSelfAssessmentQuestionFormatter\format(), ilUtil\includeMathjax(), ilUtil\insertLatexImages(), ilCertificate\outCertificate(), ilGlossaryTermGUI\output(), ilForumExportGUI\prepare(), ilPDFGeneration\prepareGeneration(), ilBibliographicDetailsGUI\prepareLatex(), ilForum\prepareText(), ilUtil\prepareTextareaOutput(), ilSurveyEditorGUI\printViewObject(), and ilPageObjectGUI\showPage().

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◆ includeMathJax()

ilMathJax::includeMathJax ( $a_tpl = null )

Include Mathjax javascript in a template.

Parameters

ilTemplate $a_tpl

Definition at line 291 of file class.ilMathJax.php.

    {
        global $tpl;
 
        if ($a_tpl == null) {
            $a_tpl = $tpl;
        }
 
        if ($this->engine == self::ENGINE_CLIENT) {
            $a_tpl->addJavaScript($this->mathjax_url);
        }
    }

References $tpl.

Referenced by init().

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◆ init()

ilMathJax::init ( $a_purpose = self::PURPOSE_BROWSER )

Initialize the usage This must be done before any rendering call.

Parameters

string $a_purpose purpose of the request

Returns: ilMathJax

Definition at line 169 of file class.ilMathJax.php.

    {
        // reset the choice of a former initialisation
        unset($this->engine);
 
        // try server-side rendering first, set this engine, if possible
        if ($this->settings->get('enable_server')) {
            $this->server_address = $this->settings->get('server_address');
            $this->server_timeout = $this->settings->get('server_timeout');
 
            if ($a_purpose == self::PURPOSE_BROWSER && $this->settings->get('server_for_browser')) {
                $this->engine = self::ENGINE_SERVER;
                // delivering svg directly in page may be faster than loading image files
                $this->setRendering(self::RENDER_SVG_AS_XML_EMBED);
            } elseif ($a_purpose == self::PURPOSE_EXPORT && $this->settings->get('server_for_export')) {
                $this->engine = self::ENGINE_SERVER;
                // offline pages must always embed the svg as image tags
                // otherwise the html base tag may conflict with references in svg
                $this->setRendering(self::RENDER_SVG_AS_IMG_EMBED);
            } elseif ($a_purpose == self::PURPOSE_PDF && $this->settings->get('server_for_pdf')) {
                $this->engine = self::ENGINE_SERVER;
                // embedded png works in TCPDF and should work in most engines
                $this->setRendering(self::RENDER_PNG_AS_IMG_EMBED);
                $this->setDpi(600);
                $this->setZoomFactor(0.17);
            } elseif ($a_purpose == self::PURPOSE_DEFERRED_PDF && $this->settings->get('server_for_pdf')) {
                $this->engine = self::ENGINE_DEFERRED;
            }
        }
 
        // if server is not generally enabled or not activated for the intended purpose
        // then set engine for client-side rendering, if possible
        if (!isset($this->engine) && $this->settings->get('enable')) {
            $this->engine = self::ENGINE_CLIENT;
            $this->mathjax_url = $this->settings->get('path_to_mathjax');
            $this->includeMathJax();
 
            switch ((int) $this->settings->get("limiter")) {
                case 1:
                    $this->start_limiter = "[tex]";
                    $this->end_limiter = "[/tex]";
                    break;
 
                case 2:
                    $this->start_limiter = '<span class="math">';
                    $this->end_limiter = '</span>';
                    break;
 
                default:
                    $this->start_limiter = "\‍(";
                    $this->end_limiter = "\‍)";
                    break;
            }
        }
 
        // neither server nor client side rendering is enabled
        // the use the older mimetex as fallback, if configured in ilias.ini.php
        if (!isset($this->engine) && !empty($this->mimetex_url)) {
            $this->engine = self::ENGINE_MIMETEX;
        }
 
        // no engine available or configured
        if (!isset($this->engine)) {
            $this->engine = self::ENGINE_NONE;
        }
 
        return $this;
    }

References ENGINE_CLIENT, ENGINE_DEFERRED, ENGINE_MIMETEX, ENGINE_NONE, ENGINE_SERVER, includeMathJax(), setDpi(), setRendering(), settings(), and setZoomFactor().

Referenced by __construct().

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◆ insertLatexImages()

ilMathJax::insertLatexImages	(	$a_text,
		$a_start = `'[tex]'`,
		$a_end = `'[/tex]'`,
		$a_dir = `null`,
		$a_path = `null`
	)

Replace tex tags with formula image code New version of ilUtil::insertLatexImages.

Parameters

string	$a_text	text to be converted
string	$a_start	start tag to be searched for
string	$a_end	end tag to be converted
string	$a_dir	output directory for rendered offline image files
string	$a_path	path to be used in the src of offline images

Returns: string replaced text

Definition at line 317 of file class.ilMathJax.php.

    {
        // is this replacement still needed?
        // it was defined in the old ilUtil::insertLatexImages function
        // perhaps it was related to jsmath
        if ($this->engine != self::ENGINE_MIMETEX) {
            $a_text = preg_replace("/\\\\([RZN])([^a-zA-Z]|<\/span>)/", "\\mathbb{" . "$1" . "}" . "$2", $a_text);
        }
 
        // this is a fix for bug5362
        $a_start = str_replace("\\", "", $a_start);
        $a_end = str_replace("\\", "", $a_end);
 
        $cpos = 0;
        while (is_int($spos = stripos($a_text, $a_start, $cpos))) {     // find next start
            if (is_int($epos = stripos($a_text, $a_end, $spos + strlen($a_start)))) {
                // extract the tex code inside the delimiters
                $tex = substr($a_text, $spos + strlen($a_start), $epos - $spos - strlen($a_start));
 
                // undo a code protection done by the deferred engine before
                if (substr($tex, 0, 7) == 'base64:') {
                    $tex = base64_decode(substr($tex, 7));
                }
 
                // omit the html newlines added by the ILIAS page editor
                // handle custom newlines in JSMath (still needed?)
                $tex = str_replace('<br>', '', $tex);
                $tex = str_replace('<br/>', '', $tex);
                $tex = str_replace('<br />', '', $tex);
                $tex = str_replace('\\\\', '\\cr', $tex);
 
                // replace, if tags do not go across div borders
                if (!is_int(strpos($tex, '</div>'))) {
                    switch ($this->engine) {
                        case self::ENGINE_CLIENT:
                            // prepare code for processing in the browser
                            // add necessary html encodings
                            // use the configured mathjax delimiters
                            $tex = str_replace('<', '&lt;', $tex);
                            $replacement = $this->start_limiter . $tex . $this->end_limiter;
                            break;
 
                        case self::ENGINE_SERVER:
                            // apply server-side processing
                            // mathjax-node expects pure tex code
                            // so revert any applied html encoding
                            $tex = html_entity_decode($tex, ENT_QUOTES, 'UTF-8');
                            $replacement = $this->renderMathJax($tex, $a_dir, $a_path);
                            break;
 
                        case self::ENGINE_MIMETEX:
                            // use mimetex
                            $replacement = $this->renderMimetex($tex, $a_dir, $a_path);
                            break;
 
                        case self::ENGINE_DEFERRED:
                            // protect code to save it for post production
                            $replacement = '[tex]' . 'base64:' . base64_encode($tex) . '[/tex]';
                            break;
 
                        case self::ENGINE_NONE:
                            // show only the pure tex code
                            $replacement = htmlspecialchars($tex);
                            break;
                    }
 
                    // replace tex code with prepared code or generated image
                    $a_text = substr($a_text, 0, $spos) . $replacement . substr($a_text, $epos + strlen($a_end));
                }
            }
            $cpos = $spos + 1;
        }
        return $a_text;
    }

References $end_limiter, ENGINE_CLIENT, ENGINE_DEFERRED, ENGINE_MIMETEX, ENGINE_NONE, ENGINE_SERVER, renderMathJax(), and renderMimetex().

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◆ renderMathJax()

ilMathJax::renderMathJax	(	$a_tex,
		$a_output_dir = `null`,
		$a_image_path = `null`
	)

protected

Render image from tex code using the MathJax server.

Parameters

string	$a_tex	tex code
string	$a_output_dir	directory to save an image file (without trailing slash)
string	$a_image_path	image path to be used in the src attribute (without trailing slash)

Returns: string html code of the rendered image

Definition at line 401 of file class.ilMathJax.php.

    {
        $options = $this->default_options;
        $options['math'] = $a_tex;
        $options['dpi'] = $this->dpi;
 
        switch ($this->output) {
            case 'png':
                $options['svg'] = false;
                $options['png'] = true;
                $suffix = ".png";
                break;
 
            case 'svg':
            default:
                $options['svg'] = true;
                $options['png'] = false;
                $suffix = ".svg";
                break;
        }
 
        // store cached rendered image in cascading sub directories
        $hash = md5($a_tex . '#' . $this->dpi);
        $file = $this->cache_dir . '/' . substr($hash, 0, 4) . '/' . substr($hash, 4, 4) . '/' . $hash . $suffix;
 
        try {
            if (!is_file($file)) {
                // file has to be rendered
                if ($this->use_curl) {
                    $curl = curl_init($this->server_address);
                    curl_setopt($curl, CURLOPT_HEADER, false);
                    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
                    curl_setopt($curl, CURLOPT_HTTPHEADER, array("Content-type: application/json"));
                    curl_setopt($curl, CURLOPT_POST, true);
                    curl_setopt($curl, CURLOPT_POSTFIELDS, json_encode($options));
                    curl_setopt($curl, CURLOPT_TIMEOUT, $this->server_timeout);
 
                    $response = curl_exec($curl);
                    $status = curl_getinfo($curl, CURLINFO_HTTP_CODE);
                    curl_close($curl);
 
                    if ($status != 200) {
                        $lines = explode("\n", $response);
                        return "[TeX rendering failed: " . $lines[1] . " " . htmlspecialchars($a_tex) . "]";
                    }
                } else {
                    $context = stream_context_create(
                        array(
                            'http' => array(
                                'method' => 'POST',
                                'content' => json_encode($options),
                                'header' => "Content-Type: application/json\r\n",
                                'timeout' => $this->server_timeout,
                                'ignore_errors' => true
                            )
                        )
                    );
                    $response = @file_get_contents($this->server_address, false, $context);
                    if (empty($response)) {
                        return "[TeX rendering failed: " . htmlspecialchars($a_tex) . "]";
                    }
                }
 
                // create the parent directories recursively
                @mkdir(dirname($file), 0777, true);
 
                // save a rendered image to the temp folder
                file_put_contents($file, $response);
            }
 
            // handle output of images for offline usage without embedding
            if (isset($a_output_dir) && is_dir($a_output_dir)) {
                @copy($file, $a_output_dir . '/' . $hash . $suffix);
                $src = $a_image_path . '/' . $hash . $suffix;
            } else {
                $src = ILIAS_HTTP_PATH . '/' . $file;
            }
 
            // generate the image tag
            switch ($this->output) {
                case 'png':
                    list($width, $height) = getimagesize($file);
                    $width = round($width * $this->zoom_factor);
                    $height = round($height * $this->zoom_factor);
                    $mime = 'image/png';
                    break;
 
                case 'svg':
                default:
                    $svg = simplexml_load_file($file);
                    $width = round($svg['width'] * $this->zoom_factor);
                    $height = round($svg['height'] * $this->zoom_factor);
                    $mime = 'image/svg+xml';
                    break;
            }
 
 
            // generate the image tag
            switch ($this->rendering) {
                case self::RENDER_SVG_AS_XML_EMBED:
                    $html = empty($response) ? file_get_contents($file) : $response;
                    break;
 
                case self::RENDER_SVG_AS_IMG_EMBED:
                case self::RENDER_PNG_AS_IMG_EMBED:
                    $html = '<img src="data:' . $mime . ';base64,'
                        . base64_encode(empty($response) ? file_get_contents($file) : $response)
                        . '" style="width:' . $width . '; height:' . $height . ';" />';
                    break;
 
                case self::RENDER_SVG_AS_IMG_FILE:
                case self::RENDER_PNG_AS_IMG_FILE:
                    $html = '<img src="' . $src . '" style="width:' . $width . '; height:' . $height . ';" />';
                    break;
 
                case self::RENDER_PNG_AS_FO_FILE:
                    $html = '<fo:external-graphic src="url(' . realpath($file) . ')"'
                        . ' content-height="' . $height . 'px" content-width="' . $width . 'px"></fo:external-graphic>';
                    break;
 
                default:
                    $html = htmlspecialchars($a_tex);
                    break;
            }
 
            return $html;
        } catch (Exception $e) {
            return "[TeX rendering failed: " . $e->getMessage() . "]";
        }
    }

References $default_options, $dpi, $file, $html, $options, $response, RENDER_PNG_AS_FO_FILE, RENDER_PNG_AS_IMG_EMBED, RENDER_PNG_AS_IMG_FILE, RENDER_SVG_AS_IMG_EMBED, RENDER_SVG_AS_IMG_FILE, and RENDER_SVG_AS_XML_EMBED.

Referenced by insertLatexImages().

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◆ renderMimetex()

ilMathJax::renderMimetex	(	$a_tex,
		$a_output_dir = `null`,
		$a_image_path = `null`
	)

protected

Render image from tex code using mimetex.

Parameters

string	$a_tex	tex code
string	$a_output_dir	directory to save an image file (without trailing slash)
string	$a_image_path	image path to be used in the src attribute (without trailing slash)

Returns: string html code of rendered image

Definition at line 541 of file class.ilMathJax.php.

    {
        $call = $this->mimetex_url . '?'
            . rawurlencode(str_replace('&amp;', '&', str_replace('&gt;', '>', str_replace('&lt;', '<', $a_tex))));
 
        if (empty($a_output_dir)) {
            $html = '<img alt="' . htmlentities($a_tex) . '" src="' . $call . '" />';
        } else {
            $cnt = $this->mimetex_count++;
 
            // get image from cgi and write it to file
            $fpr = @fopen($call, "r");
            $lcnt = 0;
            if ($fpr) {
                while (!feof($fpr)) {
                    $buf = fread($fpr, 1024);
                    if ($lcnt == 0) {
                        if (is_int(strpos(strtoupper(substr($buf, 0, 5)), "GIF"))) {
                            $suffix = "gif";
                        } else {
                            $suffix = "png";
                        }
                        $fpw = fopen($a_output_dir . "/img" . $cnt . "." . $suffix, "w");
                    }
                    $lcnt++;
                    fwrite($fpw, $buf);
                }
                fclose($fpw);
                fclose($fpr);
            }
 
            $html = '<img alt="' . htmlentities($a_tex) . '" src=' . $a_image_path . '/img"' . $cnt . '.' . $suffix . '/' . '" />';
        }
 
        return $html;
    }

References $html.

Referenced by insertLatexImages().

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◆ setDpi()

ilMathJax::setDpi ( $a_dpi )

Set the dpi of the rendered images.

Parameters

int $a_dpi

Returns: ilMathJax

Definition at line 269 of file class.ilMathJax.php.

    {
        $this->dpi = (float) $a_dpi;
        return $this;
    }

Referenced by init().

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◆ setRendering()

ilMathJax::setRendering ( $a_rendering )

Set the image type rendered by the server.

Parameters

string $a_rendering

Returns: ilMathJax

Definition at line 244 of file class.ilMathJax.php.

    {
        switch ($a_rendering) {
            case self::RENDER_SVG_AS_XML_EMBED:
            case self::RENDER_SVG_AS_IMG_EMBED:
            case self::RENDER_SVG_AS_IMG_FILE:
                $this->rendering = $a_rendering;
                $this->output = 'svg';
                break;
 
            case self::RENDER_PNG_AS_IMG_EMBED:
            case self::RENDER_PNG_AS_IMG_FILE:
            case self::RENDER_PNG_AS_FO_FILE:
                $this->rendering = $a_rendering;
                $this->output = 'png';
                break;
        }
        return $this;
    }

References RENDER_PNG_AS_FO_FILE, RENDER_PNG_AS_IMG_EMBED, RENDER_PNG_AS_IMG_FILE, RENDER_SVG_AS_IMG_EMBED, RENDER_SVG_AS_IMG_FILE, and RENDER_SVG_AS_XML_EMBED.

Referenced by init().

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◆ setZoomFactor()

ilMathJax::setZoomFactor ( $a_factor )

Set the zoom factor for images.

Parameters

float $a_factor

Returns: ilMathJax

Definition at line 280 of file class.ilMathJax.php.

    {
        $this->zoom_factor = (float) $a_factor;
        return $this;
    }

Referenced by init().

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Field Documentation

◆ $_instance

ilMathJax::$_instance = null

staticprotected

Definition at line 34 of file class.ilMathJax.php.

Referenced by getInstance().

◆ $cache_dir

ilMathJax::$cache_dir = ''

protected

Definition at line 114 of file class.ilMathJax.php.

Referenced by getCacheSize().

◆ $default_options

ilMathJax::$default_options

protected

Initial value:

= array(
        "format" => "TeX",
        "math" => '',           
        "svg" => true,
        "mml" => false,
        "png" => false,
        "speakText" => false,
        "speakRuleset" => "mathspeak",
        "speakStyle"=> "default",
        "ex"=> 6,
        "width"=> 1000000,
        "linebreaks"=> false,
    )

Definition at line 119 of file class.ilMathJax.php.

Referenced by renderMathJax().

◆ $dpi

ilMathJax::$dpi = 150

protected

Definition at line 84 of file class.ilMathJax.php.

Referenced by renderMathJax().

◆ $end_limiter

ilMathJax::$end_limiter = ''

protected

Definition at line 59 of file class.ilMathJax.php.

Referenced by insertLatexImages().

◆ $engine

ilMathJax::$engine = null

protected

Definition at line 44 of file class.ilMathJax.php.

◆ $mathjax_url

ilMathJax::$mathjax_url = ''

protected

Definition at line 49 of file class.ilMathJax.php.

◆ $mimetex_count

ilMathJax::$mimetex_count = 0

protected

Definition at line 102 of file class.ilMathJax.php.

◆ $mimetex_url

ilMathJax::$mimetex_url = URL_TO_LATEX

protected

Definition at line 97 of file class.ilMathJax.php.

◆ $output

ilMathJax::$output = 'svg'

protected

Definition at line 79 of file class.ilMathJax.php.

◆ $rendering

ilMathJax::$rendering = self::RENDER_SVG_AS_XML_EMBED

protected

Definition at line 74 of file class.ilMathJax.php.

◆ $server_address

ilMathJax::$server_address = ''

protected

Definition at line 64 of file class.ilMathJax.php.

◆ $server_timeout

ilMathJax::$server_timeout = 5

protected

Definition at line 69 of file class.ilMathJax.php.

◆ $settings

ilMathJax::$settings = null

protected

Definition at line 39 of file class.ilMathJax.php.

◆ $start_limiter

ilMathJax::$start_limiter = ''

protected

Definition at line 54 of file class.ilMathJax.php.

◆ $use_curl

ilMathJax::$use_curl = true

protected

Definition at line 109 of file class.ilMathJax.php.

◆ $zoom_factor

ilMathJax::$zoom_factor = 1.0

protected

Definition at line 89 of file class.ilMathJax.php.

◆ ENGINE_CLIENT

const ilMathJax::ENGINE_CLIENT = 'client'

Definition at line 18 of file class.ilMathJax.php.

Referenced by init(), and insertLatexImages().

◆ ENGINE_DEFERRED

const ilMathJax::ENGINE_DEFERRED = 'deferred'

Definition at line 20 of file class.ilMathJax.php.

Referenced by init(), and insertLatexImages().

◆ ENGINE_MIMETEX

const ilMathJax::ENGINE_MIMETEX = 'mimetex'

Definition at line 19 of file class.ilMathJax.php.

Referenced by init(), and insertLatexImages().

◆ ENGINE_NONE

const ilMathJax::ENGINE_NONE = 'none'

Definition at line 21 of file class.ilMathJax.php.

Referenced by init(), and insertLatexImages().

◆ ENGINE_SERVER

const ilMathJax::ENGINE_SERVER = 'server'

Definition at line 17 of file class.ilMathJax.php.

Referenced by init(), and insertLatexImages().

◆ PURPOSE_BROWSER

const ilMathJax::PURPOSE_BROWSER = 'browser'

Definition at line 11 of file class.ilMathJax.php.

◆ PURPOSE_DEFERRED_PDF

const ilMathJax::PURPOSE_DEFERRED_PDF = 'deferred_pdf'

Definition at line 14 of file class.ilMathJax.php.

Referenced by ilScorm2004Export\buildExportFilePDF(), and ilSurveyEditorGUI\printViewObject().

◆ PURPOSE_EXPORT

const ilMathJax::PURPOSE_EXPORT = 'export'

Definition at line 12 of file class.ilMathJax.php.

Referenced by ilWikiHTMLExport\buildExportFile(), ilScorm2004Export\buildExportFileHTML(), ilScorm2004Export\buildExportFileHTMLOne(), ilScorm2004Export\buildExportFileISO(), ilScorm2004Export\buildExportFileSCORM(), ilObjGlossary\exportHTML(), ilObjContentObject\exportHTML(), ilObjBlogGUI\exportHTMLPages(), and ilForumExportGUI\prepare().

◆ PURPOSE_PDF

const ilMathJax::PURPOSE_PDF = 'pdf'

Definition at line 13 of file class.ilMathJax.php.

Referenced by ilScorm2004Export\buildExportFilePDF(), ilCertificate\createPreview(), ilCertificate\outCertificate(), ilPDFGeneration\prepareGeneration(), and ilSurveyEditorGUI\printViewObject().

◆ RENDER_PNG_AS_FO_FILE

const ilMathJax::RENDER_PNG_AS_FO_FILE = 'png_as_fo_file'

Definition at line 29 of file class.ilMathJax.php.

Referenced by ilScorm2004Export\buildExportFilePDF(), ilCertificate\createPreview(), ilCertificate\outCertificate(), ilSurveyEditorGUI\printViewObject(), renderMathJax(), and setRendering().

◆ RENDER_PNG_AS_IMG_EMBED

const ilMathJax::RENDER_PNG_AS_IMG_EMBED = 'png_as_img_embed'

Definition at line 27 of file class.ilMathJax.php.

Referenced by renderMathJax(), and setRendering().

◆ RENDER_PNG_AS_IMG_FILE

const ilMathJax::RENDER_PNG_AS_IMG_FILE = 'png_as_img_file'

Definition at line 28 of file class.ilMathJax.php.

Referenced by renderMathJax(), and setRendering().

◆ RENDER_SVG_AS_IMG_EMBED

const ilMathJax::RENDER_SVG_AS_IMG_EMBED = 'svg_as_img_embed'

Definition at line 24 of file class.ilMathJax.php.

Referenced by renderMathJax(), and setRendering().

◆ RENDER_SVG_AS_IMG_FILE

const ilMathJax::RENDER_SVG_AS_IMG_FILE = 'svg_as_img_file'

Definition at line 25 of file class.ilMathJax.php.

Referenced by renderMathJax(), and setRendering().

◆ RENDER_SVG_AS_XML_EMBED

const ilMathJax::RENDER_SVG_AS_XML_EMBED = 'svg_as_xml_embed'

Definition at line 23 of file class.ilMathJax.php.

Referenced by renderMathJax(), and setRendering().

The documentation for this class was generated from the following file:

Services/MathJax/classes/class.ilMathJax.php

Public Member Functions

Static Public Member Functions

Data Fields

Protected Member Functions

Protected Attributes

Static Protected Attributes

Detailed Description

Constructor & Destructor Documentation

◆ __construct()

Member Function Documentation

◆ clearCache()

◆ getCacheSize()

◆ getInstance()

◆ includeMathJax()

◆ init()

◆ insertLatexImages()

◆ renderMathJax()

◆ renderMimetex()

◆ setDpi()

◆ setRendering()

◆ setZoomFactor()

Field Documentation

◆ $_instance

◆ $cache_dir

◆ $default_options

◆ $dpi

◆ $end_limiter

◆ $engine

◆ $mathjax_url

◆ $mimetex_count

◆ $mimetex_url

◆ $output

◆ $rendering

◆ $server_address

◆ $server_timeout

◆ $settings

◆ $start_limiter

◆ $use_curl

◆ $zoom_factor

◆ ENGINE_CLIENT

◆ ENGINE_DEFERRED

◆ ENGINE_MIMETEX

◆ ENGINE_NONE

◆ ENGINE_SERVER

◆ PURPOSE_BROWSER

◆ PURPOSE_DEFERRED_PDF

◆ PURPOSE_EXPORT

◆ PURPOSE_PDF

◆ RENDER_PNG_AS_FO_FILE

◆ RENDER_PNG_AS_IMG_EMBED

◆ RENDER_PNG_AS_IMG_FILE

◆ RENDER_SVG_AS_IMG_EMBED

◆ RENDER_SVG_AS_IMG_FILE

◆ RENDER_SVG_AS_XML_EMBED