mirror of
https://github.com/ezyang/htmlpurifier.git
synced 2024-11-13 00:38:42 +00:00
492 lines
17 KiB
PHP
492 lines
17 KiB
PHP
<?php
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/**
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* Defines allowed CSS attributes and what their values are.
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* @see HTMLPurifier_HTMLDefinition
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*/
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class HTMLPurifier_CSSDefinition extends HTMLPurifier_Definition
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{
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public $type = 'CSS';
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/**
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* Assoc array of attribute name to definition object.
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* @type HTMLPurifier_AttrDef[]
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*/
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public $info = array();
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/**
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* Constructs the info array. The meat of this class.
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* @param HTMLPurifier_Config $config
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*/
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protected function doSetup($config)
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{
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$this->info['text-align'] = new HTMLPurifier_AttrDef_Enum(
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array('left', 'right', 'center', 'justify'),
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false
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);
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$border_style =
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$this->info['border-bottom-style'] =
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$this->info['border-right-style'] =
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$this->info['border-left-style'] =
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$this->info['border-top-style'] = new HTMLPurifier_AttrDef_Enum(
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array(
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'none',
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'hidden',
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'dotted',
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'dashed',
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'solid',
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'double',
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'groove',
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'ridge',
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'inset',
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'outset'
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),
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false
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);
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$this->info['border-style'] = new HTMLPurifier_AttrDef_CSS_Multiple($border_style);
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$this->info['clear'] = new HTMLPurifier_AttrDef_Enum(
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array('none', 'left', 'right', 'both'),
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false
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);
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$this->info['float'] = new HTMLPurifier_AttrDef_Enum(
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array('none', 'left', 'right'),
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false
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);
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$this->info['font-style'] = new HTMLPurifier_AttrDef_Enum(
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array('normal', 'italic', 'oblique'),
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false
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);
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$this->info['font-variant'] = new HTMLPurifier_AttrDef_Enum(
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array('normal', 'small-caps'),
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false
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);
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$uri_or_none = new HTMLPurifier_AttrDef_CSS_Composite(
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array(
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new HTMLPurifier_AttrDef_Enum(array('none')),
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new HTMLPurifier_AttrDef_CSS_URI()
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)
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);
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$this->info['list-style-position'] = new HTMLPurifier_AttrDef_Enum(
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array('inside', 'outside'),
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false
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);
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$this->info['list-style-type'] = new HTMLPurifier_AttrDef_Enum(
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array(
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'disc',
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'circle',
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'square',
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'decimal',
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'lower-roman',
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'upper-roman',
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'lower-alpha',
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'upper-alpha',
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'none'
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),
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false
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);
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$this->info['list-style-image'] = $uri_or_none;
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$this->info['list-style'] = new HTMLPurifier_AttrDef_CSS_ListStyle($config);
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$this->info['text-transform'] = new HTMLPurifier_AttrDef_Enum(
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array('capitalize', 'uppercase', 'lowercase', 'none'),
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false
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);
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$this->info['color'] = new HTMLPurifier_AttrDef_CSS_Color();
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$this->info['background-image'] = $uri_or_none;
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$this->info['background-repeat'] = new HTMLPurifier_AttrDef_Enum(
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array('repeat', 'repeat-x', 'repeat-y', 'no-repeat')
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);
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$this->info['background-attachment'] = new HTMLPurifier_AttrDef_Enum(
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array('scroll', 'fixed')
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);
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$this->info['background-position'] = new HTMLPurifier_AttrDef_CSS_BackgroundPosition();
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$border_color =
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$this->info['border-top-color'] =
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$this->info['border-bottom-color'] =
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$this->info['border-left-color'] =
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$this->info['border-right-color'] =
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$this->info['background-color'] = new HTMLPurifier_AttrDef_CSS_Composite(
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array(
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new HTMLPurifier_AttrDef_Enum(array('transparent')),
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new HTMLPurifier_AttrDef_CSS_Color()
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)
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);
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$this->info['background'] = new HTMLPurifier_AttrDef_CSS_Background($config);
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$this->info['border-color'] = new HTMLPurifier_AttrDef_CSS_Multiple($border_color);
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$border_width =
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$this->info['border-top-width'] =
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$this->info['border-bottom-width'] =
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$this->info['border-left-width'] =
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$this->info['border-right-width'] = new HTMLPurifier_AttrDef_CSS_Composite(
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array(
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new HTMLPurifier_AttrDef_Enum(array('thin', 'medium', 'thick')),
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new HTMLPurifier_AttrDef_CSS_Length('0') //disallow negative
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)
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);
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$this->info['border-width'] = new HTMLPurifier_AttrDef_CSS_Multiple($border_width);
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$this->info['letter-spacing'] = new HTMLPurifier_AttrDef_CSS_Composite(
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array(
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new HTMLPurifier_AttrDef_Enum(array('normal')),
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new HTMLPurifier_AttrDef_CSS_Length()
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)
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);
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$this->info['word-spacing'] = new HTMLPurifier_AttrDef_CSS_Composite(
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array(
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new HTMLPurifier_AttrDef_Enum(array('normal')),
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new HTMLPurifier_AttrDef_CSS_Length()
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)
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);
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$this->info['font-size'] = new HTMLPurifier_AttrDef_CSS_Composite(
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array(
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new HTMLPurifier_AttrDef_Enum(
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array(
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'xx-small',
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'x-small',
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'small',
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'medium',
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'large',
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'x-large',
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'xx-large',
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'larger',
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'smaller'
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)
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),
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new HTMLPurifier_AttrDef_CSS_Percentage(),
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new HTMLPurifier_AttrDef_CSS_Length()
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)
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);
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$this->info['line-height'] = new HTMLPurifier_AttrDef_CSS_Composite(
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array(
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new HTMLPurifier_AttrDef_Enum(array('normal')),
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new HTMLPurifier_AttrDef_CSS_Number(true), // no negatives
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new HTMLPurifier_AttrDef_CSS_Length('0'),
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new HTMLPurifier_AttrDef_CSS_Percentage(true)
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)
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);
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$margin =
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$this->info['margin-top'] =
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$this->info['margin-bottom'] =
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$this->info['margin-left'] =
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$this->info['margin-right'] = new HTMLPurifier_AttrDef_CSS_Composite(
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array(
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new HTMLPurifier_AttrDef_CSS_Length(),
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new HTMLPurifier_AttrDef_CSS_Percentage(),
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new HTMLPurifier_AttrDef_Enum(array('auto'))
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)
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);
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$this->info['margin'] = new HTMLPurifier_AttrDef_CSS_Multiple($margin);
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// non-negative
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$padding =
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$this->info['padding-top'] =
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$this->info['padding-bottom'] =
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$this->info['padding-left'] =
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$this->info['padding-right'] = new HTMLPurifier_AttrDef_CSS_Composite(
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array(
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new HTMLPurifier_AttrDef_CSS_Length('0'),
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new HTMLPurifier_AttrDef_CSS_Percentage(true)
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)
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);
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$this->info['padding'] = new HTMLPurifier_AttrDef_CSS_Multiple($padding);
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$this->info['text-indent'] = new HTMLPurifier_AttrDef_CSS_Composite(
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array(
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new HTMLPurifier_AttrDef_CSS_Length(),
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new HTMLPurifier_AttrDef_CSS_Percentage()
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)
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);
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$trusted_wh = new HTMLPurifier_AttrDef_CSS_Composite(
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array(
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new HTMLPurifier_AttrDef_CSS_Length('0'),
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new HTMLPurifier_AttrDef_CSS_Percentage(true),
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new HTMLPurifier_AttrDef_Enum(array('auto'))
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)
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);
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$max = $config->get('CSS.MaxImgLength');
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$this->info['min-width'] =
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$this->info['max-width'] =
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$this->info['min-height'] =
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$this->info['max-height'] =
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$this->info['width'] =
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$this->info['height'] =
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$max === null ?
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$trusted_wh :
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new HTMLPurifier_AttrDef_Switch(
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'img',
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// For img tags:
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new HTMLPurifier_AttrDef_CSS_Composite(
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array(
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new HTMLPurifier_AttrDef_CSS_Length('0', $max),
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new HTMLPurifier_AttrDef_Enum(array('auto'))
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)
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),
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// For everyone else:
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$trusted_wh
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);
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$this->info['text-decoration'] = new HTMLPurifier_AttrDef_CSS_TextDecoration();
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$this->info['font-family'] = new HTMLPurifier_AttrDef_CSS_FontFamily();
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// this could use specialized code
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$this->info['font-weight'] = new HTMLPurifier_AttrDef_Enum(
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array(
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'normal',
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'bold',
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'bolder',
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'lighter',
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'100',
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'200',
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'300',
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'400',
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'500',
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'600',
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'700',
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'800',
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'900'
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),
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false
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);
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// MUST be called after other font properties, as it references
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// a CSSDefinition object
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$this->info['font'] = new HTMLPurifier_AttrDef_CSS_Font($config);
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// same here
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$this->info['border'] =
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$this->info['border-bottom'] =
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$this->info['border-top'] =
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$this->info['border-left'] =
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$this->info['border-right'] = new HTMLPurifier_AttrDef_CSS_Border($config);
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$this->info['border-collapse'] = new HTMLPurifier_AttrDef_Enum(
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array('collapse', 'separate')
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);
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$this->info['caption-side'] = new HTMLPurifier_AttrDef_Enum(
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array('top', 'bottom')
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);
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$this->info['table-layout'] = new HTMLPurifier_AttrDef_Enum(
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array('auto', 'fixed')
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);
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$this->info['vertical-align'] = new HTMLPurifier_AttrDef_CSS_Composite(
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array(
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new HTMLPurifier_AttrDef_Enum(
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array(
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'baseline',
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'sub',
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'super',
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'top',
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'text-top',
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'middle',
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'bottom',
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'text-bottom'
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)
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),
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new HTMLPurifier_AttrDef_CSS_Length(),
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new HTMLPurifier_AttrDef_CSS_Percentage()
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)
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);
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$this->info['border-spacing'] = new HTMLPurifier_AttrDef_CSS_Multiple(new HTMLPurifier_AttrDef_CSS_Length(), 2);
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// These CSS properties don't work on many browsers, but we live
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// in THE FUTURE!
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$this->info['white-space'] = new HTMLPurifier_AttrDef_Enum(
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array('nowrap', 'normal', 'pre', 'pre-wrap', 'pre-line')
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);
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if ($config->get('CSS.Proprietary')) {
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$this->doSetupProprietary($config);
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}
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if ($config->get('CSS.AllowTricky')) {
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$this->doSetupTricky($config);
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}
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if ($config->get('CSS.Trusted')) {
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$this->doSetupTrusted($config);
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}
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$allow_important = $config->get('CSS.AllowImportant');
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// wrap all attr-defs with decorator that handles !important
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foreach ($this->info as $k => $v) {
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$this->info[$k] = new HTMLPurifier_AttrDef_CSS_ImportantDecorator($v, $allow_important);
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}
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$this->setupConfigStuff($config);
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}
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/**
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* @param HTMLPurifier_Config $config
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*/
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protected function doSetupProprietary($config)
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{
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// Internet Explorer only scrollbar colors
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$this->info['scrollbar-arrow-color'] = new HTMLPurifier_AttrDef_CSS_Color();
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$this->info['scrollbar-base-color'] = new HTMLPurifier_AttrDef_CSS_Color();
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$this->info['scrollbar-darkshadow-color'] = new HTMLPurifier_AttrDef_CSS_Color();
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$this->info['scrollbar-face-color'] = new HTMLPurifier_AttrDef_CSS_Color();
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$this->info['scrollbar-highlight-color'] = new HTMLPurifier_AttrDef_CSS_Color();
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$this->info['scrollbar-shadow-color'] = new HTMLPurifier_AttrDef_CSS_Color();
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// vendor specific prefixes of opacity
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$this->info['-moz-opacity'] = new HTMLPurifier_AttrDef_CSS_AlphaValue();
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$this->info['-khtml-opacity'] = new HTMLPurifier_AttrDef_CSS_AlphaValue();
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// only opacity, for now
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$this->info['filter'] = new HTMLPurifier_AttrDef_CSS_Filter();
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// more CSS3
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$this->info['page-break-after'] =
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$this->info['page-break-before'] = new HTMLPurifier_AttrDef_Enum(
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array(
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'auto',
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'always',
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'avoid',
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'left',
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'right'
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)
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);
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$this->info['page-break-inside'] = new HTMLPurifier_AttrDef_Enum(array('auto', 'avoid'));
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$border_radius = new HTMLPurifier_AttrDef_CSS_Composite(
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array(
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new HTMLPurifier_AttrDef_CSS_Percentage(true), // disallow negative
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new HTMLPurifier_AttrDef_CSS_Length('0') // disallow negative
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));
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$this->info['border-top-left-radius'] =
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$this->info['border-top-right-radius'] =
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$this->info['border-bottom-right-radius'] =
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$this->info['border-bottom-left-radius'] = new HTMLPurifier_AttrDef_CSS_Multiple($border_radius, 2);
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// TODO: support SLASH syntax
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$this->info['border-radius'] = new HTMLPurifier_AttrDef_CSS_Multiple($border_radius, 4);
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}
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/**
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* @param HTMLPurifier_Config $config
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*/
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protected function doSetupTricky($config)
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{
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$this->info['display'] = new HTMLPurifier_AttrDef_Enum(
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array(
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'inline',
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'block',
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'list-item',
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'run-in',
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'compact',
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'marker',
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'table',
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'inline-block',
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'inline-table',
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'table-row-group',
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'table-header-group',
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'table-footer-group',
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'table-row',
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'table-column-group',
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'table-column',
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'table-cell',
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'table-caption',
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'none'
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)
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);
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$this->info['visibility'] = new HTMLPurifier_AttrDef_Enum(
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array('visible', 'hidden', 'collapse')
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);
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$this->info['overflow'] = new HTMLPurifier_AttrDef_Enum(array('visible', 'hidden', 'auto', 'scroll'));
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$this->info['opacity'] = new HTMLPurifier_AttrDef_CSS_AlphaValue();
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}
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/**
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* @param HTMLPurifier_Config $config
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*/
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protected function doSetupTrusted($config)
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{
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$this->info['position'] = new HTMLPurifier_AttrDef_Enum(
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array('static', 'relative', 'absolute', 'fixed')
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);
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$this->info['top'] =
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$this->info['left'] =
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$this->info['right'] =
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$this->info['bottom'] = new HTMLPurifier_AttrDef_CSS_Composite(
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array(
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new HTMLPurifier_AttrDef_CSS_Length(),
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new HTMLPurifier_AttrDef_CSS_Percentage(),
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new HTMLPurifier_AttrDef_Enum(array('auto')),
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)
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);
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$this->info['z-index'] = new HTMLPurifier_AttrDef_CSS_Composite(
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array(
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new HTMLPurifier_AttrDef_Integer(),
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new HTMLPurifier_AttrDef_Enum(array('auto')),
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)
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);
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}
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/**
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* Performs extra config-based processing. Based off of
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* HTMLPurifier_HTMLDefinition.
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* @param HTMLPurifier_Config $config
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* @todo Refactor duplicate elements into common class (probably using
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* composition, not inheritance).
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*/
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protected function setupConfigStuff($config)
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{
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// setup allowed elements
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$support = "(for information on implementing this, see the " .
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"support forums) ";
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$allowed_properties = $config->get('CSS.AllowedProperties');
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if ($allowed_properties !== null) {
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foreach ($this->info as $name => $d) {
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if (!isset($allowed_properties[$name])) {
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unset($this->info[$name]);
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}
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unset($allowed_properties[$name]);
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}
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// emit errors
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foreach ($allowed_properties as $name => $d) {
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// :TODO: Is this htmlspecialchars() call really necessary?
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$name = htmlspecialchars($name);
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trigger_error("Style attribute '$name' is not supported $support", E_USER_WARNING);
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}
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}
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$forbidden_properties = $config->get('CSS.ForbiddenProperties');
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if ($forbidden_properties !== null) {
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foreach ($this->info as $name => $d) {
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if (isset($forbidden_properties[$name])) {
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unset($this->info[$name]);
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}
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}
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}
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}
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}
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// vim: et sw=4 sts=4
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