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