Generates HTML from tokens. More...

Collaboration diagram for HTMLPurifier_Generator:

Public Member Functions
	__construct ($config, $context)
	generateFromTokens ($tokens)
	Generates HTML from an array of tokens.
	generateFromToken ($token)
	Generates HTML from a single token.
	generateScriptFromToken ($token)
	Special case processor for the contents of script tags.
	generateAttributes ($assoc_array_of_attributes, $element=false)
	Generates attribute declarations from attribute array.
	escape ($string, $quote=ENT_COMPAT)
	Escapes raw text data.

Protected Attributes
	$config
	Configuration for the generator.

Private Attributes
	$_xhtml = true
	Whether or not generator should produce XML output.
	$_scriptFix = false
	:HACK: Whether or not generator should comment the insides of <script> tags
	$_def
	Cache of HTMLDefinition during HTML output to determine whether or not attributes should be minimized.
	$_sortAttr
	Cache of Output.SortAttr.

Detailed Description

Generates HTML from tokens.

Todo:

Refactor interface so that configuration/context is determined upon instantiation, no need for messy generateFromTokens() calls

Make some of the more internal functions protected, and have unit tests work around that

Definition at line 10 of file Generator.php.

Constructor & Destructor Documentation

HTMLPurifier_Generator::__construct	(	$config,
		$context
	)

Parameters

$config	Instance of HTMLPurifier_Config
$context	Instance of HTMLPurifier_Context

Definition at line 43 of file Generator.php.

References $config.

                                                   {
        $this->config = $config;
        $this->_scriptFix = $config->get('Output.CommentScriptContents');
        $this->_sortAttr = $config->get('Output.SortAttr');
        $this->_def = $config->getHTMLDefinition();
        $this->_xhtml = $this->_def->doctype->xml;
    }

Member Function Documentation

HTMLPurifier_Generator::escape	(	$string,
		$quote = `ENT_COMPAT`
	)

Escapes raw text data.

Todo:: This really ought to be protected, but until we have a facility for properly generating HTML here w/o using tokens, it stays public.

Parameters

$string	String data to escape for HTML.
$quote	Quoting style, like htmlspecialchars. ENT_NOQUOTES is permissible for non-attribute output.

Returns: String escaped data.

Definition at line 177 of file Generator.php.

Referenced by generateAttributes(), and generateFromToken().

                                                         {
        return htmlspecialchars($string, $quote, 'UTF-8');
    }

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HTMLPurifier_Generator::generateAttributes	(	$assoc_array_of_attributes,
		$element = `false`
	)

Generates attribute declarations from attribute array.

Note: This does not include the leading or trailing space.

Parameters

$assoc_array_of_attributes	Attribute array
$element	Name of element attributes are for, used to check attribute minimization.

Returns: Generate HTML fragment for insertion.

Definition at line 149 of file Generator.php.

References escape().

Referenced by generateFromToken().

                                                                                     {
        $html = '';
        if ($this->_sortAttr) ksort($assoc_array_of_attributes);
        foreach ($assoc_array_of_attributes as $key => $value) {
            if (!$this->_xhtml) {
                // Remove namespaced attributes
                if (strpos($key, ':') !== false) continue;
                // Check if we should minimize the attribute: val="val" -> val
                if ($element && !empty($this->_def->info[$element]->attr[$key]->minimized)) {
                    $html .= $key . ' ';
                    continue;
                }
            }
            $html .= $key.'="'.$this->escape($value).'" ';
        }
        return rtrim($html);
    }

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HTMLPurifier_Generator::generateFromToken ( $token )

Generates HTML from a single token.

Parameters

$token HTMLPurifier_Token object.

Returns: Generated HTML

Definition at line 100 of file Generator.php.

References escape(), and generateAttributes().

Referenced by generateFromTokens(), and generateScriptFromToken().

                                              {
        if (!$token instanceof HTMLPurifier_Token) {
            trigger_error('Cannot generate HTML from non-HTMLPurifier_Token object', E_USER_WARNING);
            return '';
        } elseif ($token instanceof HTMLPurifier_Token_Start) {
            $attr = $this->generateAttributes($token->attr, $token->name);
            return '<' . $token->name . ($attr ? ' ' : '') . $attr . '>';
        } elseif ($token instanceof HTMLPurifier_Token_End) {
            return '</' . $token->name . '>';
        } elseif ($token instanceof HTMLPurifier_Token_Empty) {
            $attr = $this->generateAttributes($token->attr, $token->name);
             return '<' . $token->name . ($attr ? ' ' : '') . $attr .
                ( $this->_xhtml ? ' /': '' ) // <br /> v. <br>
                . '>';
        } elseif ($token instanceof HTMLPurifier_Token_Text) {
            return $this->escape($token->data, ENT_NOQUOTES);
        } elseif ($token instanceof HTMLPurifier_Token_Comment) {
            return '<!--' . $token->data . '-->';
        } else {
            return '';
        }
    }

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HTMLPurifier_Generator::generateFromTokens ( $tokens )

Generates HTML from an array of tokens.

Parameters

$tokens	Array of HTMLPurifier_Token
$config	HTMLPurifier_Config object

Returns: Generated HTML

Definition at line 57 of file Generator.php.

References $tidy, generateFromToken(), and generateScriptFromToken().

                                                {
        if (!$tokens) return '';
        // Basic algorithm
        $html = '';
        for ($i = 0, $size = count($tokens); $i < $size; $i++) {
            if ($this->_scriptFix && $tokens[$i]->name === 'script'
                && $i + 2 < $size && $tokens[$i+2] instanceof HTMLPurifier_Token_End) {
                // script special case
                // the contents of the script block must be ONE token
                // for this to work.
                $html .= $this->generateFromToken($tokens[$i++]);
                $html .= $this->generateScriptFromToken($tokens[$i++]);
            }
            $html .= $this->generateFromToken($tokens[$i]);
        }
        // Tidy cleanup
        if (extension_loaded('tidy') && $this->config->get('Output.TidyFormat')) {
            $tidy = new Tidy;
            $tidy->parseString($html, array(
               'indent'=> true,
               'output-xhtml' => $this->_xhtml,
               'show-body-only' => true,
               'indent-spaces' => 2,
               'wrap' => 68,
            ), 'utf8');
            $tidy->cleanRepair();
            $html = (string) $tidy; // explicit cast necessary
        }
        // Normalize newlines to system defined value
        $nl = $this->config->get('Output.Newline');
        if ($nl === null) $nl = PHP_EOL;
        if ($nl !== "\n") $html = str_replace("\n", $nl, $html);
        return $html;
    }

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HTMLPurifier_Generator::generateScriptFromToken ( $token )

Special case processor for the contents of script tags.

Warning: This runs into problems if there's already a literal –> somewhere inside the script contents.

Definition at line 134 of file Generator.php.

References $data, and generateFromToken().

Referenced by generateFromTokens().

                                                    {
        if (!$token instanceof HTMLPurifier_Token_Text) return $this->generateFromToken($token);
        // Thanks <http://lachy.id.au/log/2005/05/script-comments>
        $data = preg_replace('#//\s*$#', '', $token->data);
        return '<!--//--><![CDATA[//><!--' . "\n" . trim($data) . "\n" . '//--><!]]>';
    }

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Field Documentation

HTMLPurifier_Generator::$_def

private

Cache of HTMLDefinition during HTML output to determine whether or not attributes should be minimized.

Definition at line 27 of file Generator.php.

HTMLPurifier_Generator::$_scriptFix = false

private

:HACK: Whether or not generator should comment the insides of <script> tags

Definition at line 21 of file Generator.php.

HTMLPurifier_Generator::$_sortAttr

private

Cache of Output.SortAttr.

Definition at line 32 of file Generator.php.

HTMLPurifier_Generator::$_xhtml = true

private

Whether or not generator should produce XML output.

Definition at line 16 of file Generator.php.

HTMLPurifier_Generator::$config

protected

Configuration for the generator.

Definition at line 37 of file Generator.php.

Referenced by __construct().

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

Services/Html/HtmlPurifier/library/HTMLPurifier/Generator.php

Public Member Functions

Protected Attributes

Private Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Field Documentation