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<?php
/**
* @package dompdf
* @link http://dompdf.github.com/
* @author Benj Carson <benjcarson@digitaljunkies.ca>
* @author Helmut Tischer <htischer@weihenstephan.org>
* @author Fabien Ménager <fabien.menager@gmail.com>
* @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
*/
namespace Dompdf\Css;
use Dompdf\Adapter\CPDF;
use Dompdf\Exception;
use Dompdf\FontMetrics;
use Dompdf\Frame;
/**
* Represents CSS properties.
*
* The Style class is responsible for handling and storing CSS properties.
* It includes methods to resolve colors and lengths, as well as getters &
* setters for many CSS properties.
*
* Actual CSS parsing is performed in the {@link Stylesheet} class.
*
* @package dompdf
*/
class Style
{
const CSS_IDENTIFIER = "-?[_a-zA-Z]+[_a-zA-Z0-9-]*";
const CSS_INTEGER = "[+-]?\d+";
const CSS_NUMBER = "[+-]?\d*\.?\d+";
/**
* Default font size, in points.
*
* @var float
*/
static $default_font_size = 12;
/**
* Default line height, as a fraction of the font size.
*
* @var float
*/
static $default_line_height = 1.2;
/**
* Default "absolute" font sizes relative to the default font-size
* http://www.w3.org/TR/css3-fonts/#font-size-the-font-size-property
* @var array<float>
*/
static $font_size_keywords = [
"xx-small" => 0.6, // 3/5
"x-small" => 0.75, // 3/4
"small" => 0.889, // 8/9
"medium" => 1, // 1
"large" => 1.2, // 6/5
"x-large" => 1.5, // 3/2
"xx-large" => 2.0, // 2/1
];
/**
* List of valid text-align keywords. Should also really be a constant.
*
* @var array
*/
static $text_align_keywords = ["left", "right", "center", "justify"];
/**
* List of valid vertical-align keywords. Should also really be a constant.
*
* @var array
*/
static $vertical_align_keywords = ["baseline", "bottom", "middle", "sub",
"super", "text-bottom", "text-top", "top"];
/**
* List of all block-level (outer) display types.
* * https://www.w3.org/TR/css-display-3/#display-type
* * https://www.w3.org/TR/css-display-3/#block-level
*/
public const BLOCK_LEVEL_TYPES = [
"block",
// "flow-root",
"list-item",
// "flex",
// "grid",
"table"
];
/**
* List of all inline-level (outer) display types.
* * https://www.w3.org/TR/css-display-3/#display-type
* * https://www.w3.org/TR/css-display-3/#inline-level
*/
public const INLINE_LEVEL_TYPES = [
"inline",
"inline-block",
// "inline-flex",
// "inline-grid",
"inline-table"
];
/**
* List of all table-internal (outer) display types.
* * https://www.w3.org/TR/css-display-3/#layout-specific-display
*/
public const TABLE_INTERNAL_TYPES = [
"table-row-group",
"table-header-group",
"table-footer-group",
"table-row",
"table-cell",
"table-column-group",
"table-column",
"table-caption"
];
/**
* List of all inline (inner) display types. Should really be a constant.
*
* @var array
*/
static $INLINE_TYPES = ["inline"];
/**
* List of all block (inner) display types. Should really be a constant.
*
* @var array
*/
static $BLOCK_TYPES = ["block", "inline-block", "table-cell", "list-item"];
/**
* List of all table (inner) display types. Should really be a constant.
*
* @var array
*/
static $TABLE_TYPES = ["table", "inline-table"];
/**
* Lookup table for valid display types. Initially computed from the
* different constants.
*
* @var array
*/
protected static $valid_display_types = [];
/**
* List of all positioned types. Should really be a constant.
*
* @var array
*/
static $POSITIONNED_TYPES = ["relative", "absolute", "fixed"];
/**
* List of valid border styles. Should also really be a constant.
*
* @var array
*/
static $BORDER_STYLES = ["none", "hidden", "dotted", "dashed", "solid",
"double", "groove", "ridge", "inset", "outset"];
/**
* Map of CSS shorthand properties and their corresponding sub-properties.
* The order of the sub-properties is relevant for the fallback getter,
* which is used in case no specific getter method is defined.
*
* @var array
*/
protected static $_props_shorthand = [
"background" => [
"background_image",
"background_position",
"background_size",
"background_repeat",
// "background_origin",
// "background_clip",
"background_attachment",
"background_color"
],
"border" => [
"border_width",
"border_style",
"border_color"
],
"border_top" => [
"border_top_width",
"border_top_style",
"border_top_color"
],
"border_right" => [
"border_right_width",
"border_right_style",
"border_right_color"
],
"border_bottom" => [
"border_bottom_width",
"border_bottom_style",
"border_bottom_color"
],
"border_left" => [
"border_left_width",
"border_left_style",
"border_left_color"
],
"border_width" => [
"border_top_width",
"border_right_width",
"border_bottom_width",
"border_left_width"
],
"border_style" => [
"border_top_style",
"border_right_style",
"border_bottom_style",
"border_left_style"
],
"border_color" => [
"border_top_color",
"border_right_color",
"border_bottom_color",
"border_left_color"
],
"border_radius" => [
"border_top_left_radius",
"border_top_right_radius",
"border_bottom_right_radius",
"border_bottom_left_radius"
],
"font" => [
"font_family",
"font_size",
// "font_stretch",
"font_style",
"font_variant",
"font_weight",
"line_height"
],
"list_style" => [
"list_style_image",
"list_style_position",
"list_style_type"
],
"margin" => [
"margin_top",
"margin_right",
"margin_bottom",
"margin_left"
],
"padding" => [
"padding_top",
"padding_right",
"padding_bottom",
"padding_left"
],
"outline" => [
"outline_width",
"outline_style",
"outline_color"
]
];
/**
* Maps legacy property names to actual property names.
*
* @var array
*/
protected static $_props_alias = [
"word_wrap" => "overflow_wrap",
"_dompdf_background_image_resolution" => "background_image_resolution",
"_dompdf_image_resolution" => "image_resolution",
"_webkit_transform" => "transform",
"_webkit_transform_origin" => "transform_origin"
];
/**
* Default style values.
*
* @link http://www.w3.org/TR/CSS21/propidx.html
*
* @var array
*/
protected static $_defaults = null;
/**
* List of inherited properties
*
* @link http://www.w3.org/TR/CSS21/propidx.html
*
* @var array
*/
protected static $_inherited = null;
/**
* Caches method_exists result
*
* @var array<bool>
*/
protected static $_methods_cache = [];
/**
* The stylesheet this style belongs to
*
* @var Stylesheet
*/
protected $_stylesheet;
/**
* Media queries attached to the style
*
* @var array
*/
protected $_media_queries;
/**
* Specified (or declared) values of the CSS properties.
* https://www.w3.org/TR/css-cascade-3/#value-stages
*
* @var array
*/
protected $_props = [];
/**
* Properties set by an `!important` declaration.
*
* @var array
*/
protected $_important_props = [];
/**
* Computed values of the CSS properties.
*
* @var array
*/
protected $_props_computed = [];
/**
* Used values of the CSS properties.
*
* @var array
*/
protected $_prop_cache = [];
protected static $_dependency_map = [
"border_top_style" => [
"border_top_width"
],
"border_bottom_style" => [
"border_bottom_width"
],
"border_left_style" => [
"border_left_width"
],
"border_right_style" => [
"border_right_width"
],
"direction" => [
"text_align"
],
"font_size" => [
"background_position",
"background_size",
"border_top_width",
"border_right_width",
"border_bottom_width",
"border_left_width",
"line_height",
"margin_top",
"margin_right",
"margin_bottom",
"margin_left",
"outline_width",
"outline_offset",
"padding_top",
"padding_right",
"padding_bottom",
"padding_left"
],
"float" => [
"display"
],
"position" => [
"display"
],
"outline_style" => [
"outline_width"
]
];
/**
* Lookup table for dependent properties. Initially computed from the
* dependency map.
*
* @var array
*/
protected static $_dependent_props = [];
/**
* Style of the parent element in document tree.
*
* @var Style
*/
protected $parent_style;
/**
* @var Frame
*/
protected $_frame;
/**
* The origin of the style
*
* @var int
*/
protected $_origin = Stylesheet::ORIG_AUTHOR;
// private members
/**
* The computed bottom spacing
*/
private $_computed_bottom_spacing = null;
/**
* @var bool
*/
private $has_border_radius_cache = null;
/**
* @var array
*/
private $resolved_border_radius = null;
/**
* @var FontMetrics
*/
private $fontMetrics;
/**
* Class constructor
*
* @param Stylesheet $stylesheet the stylesheet this Style is associated with.
* @param int $origin
*/
public function __construct(Stylesheet $stylesheet, $origin = Stylesheet::ORIG_AUTHOR)
{
$this->setFontMetrics($stylesheet->getFontMetrics());
$this->_stylesheet = $stylesheet;
$this->_media_queries = [];
$this->_origin = $origin;
$this->parent_style = null;
if (!isset(self::$_defaults)) {
// Shorthand
$d =& self::$_defaults;
// All CSS 2.1 properties, and their default values
$d["azimuth"] = "center";
$d["background_attachment"] = "scroll";
$d["background_color"] = "transparent";
$d["background_image"] = "none";
$d["background_image_resolution"] = "normal";
$d["background_position"] = "0% 0%";
$d["background_repeat"] = "repeat";
$d["background"] = "";
$d["border_collapse"] = "separate";
$d["border_color"] = "";
$d["border_spacing"] = "0";
$d["border_style"] = "";
$d["border_top"] = "";
$d["border_right"] = "";
$d["border_bottom"] = "";
$d["border_left"] = "";
$d["border_top_color"] = "currentcolor";
$d["border_right_color"] = "currentcolor";
$d["border_bottom_color"] = "currentcolor";
$d["border_left_color"] = "currentcolor";
$d["border_top_style"] = "none";
$d["border_right_style"] = "none";
$d["border_bottom_style"] = "none";
$d["border_left_style"] = "none";
$d["border_top_width"] = "medium";
$d["border_right_width"] = "medium";
$d["border_bottom_width"] = "medium";
$d["border_left_width"] = "medium";
$d["border_width"] = "";
$d["border_bottom_left_radius"] = "0";
$d["border_bottom_right_radius"] = "0";
$d["border_top_left_radius"] = "0";
$d["border_top_right_radius"] = "0";
$d["border_radius"] = "";
$d["border"] = "";
$d["bottom"] = "auto";
$d["caption_side"] = "top";
$d["clear"] = "none";
$d["clip"] = "auto";
$d["color"] = "#000000";
$d["content"] = "normal";
$d["counter_increment"] = "none";
$d["counter_reset"] = "none";
$d["cue_after"] = "none";
$d["cue_before"] = "none";
$d["cue"] = "";
$d["cursor"] = "auto";
$d["direction"] = "ltr";
$d["display"] = "inline";
$d["elevation"] = "level";
$d["empty_cells"] = "show";
$d["float"] = "none";
$d["font_family"] = $stylesheet->get_dompdf()->getOptions()->getDefaultFont();
$d["font_size"] = "medium";
$d["font_style"] = "normal";
$d["font_variant"] = "normal";
$d["font_weight"] = "normal";
$d["font"] = "";
$d["height"] = "auto";
$d["image_resolution"] = "normal";
$d["left"] = "auto";
$d["letter_spacing"] = "normal";
$d["line_height"] = "normal";
$d["list_style_image"] = "none";
$d["list_style_position"] = "outside";
$d["list_style_type"] = "disc";
$d["list_style"] = "";
$d["margin_right"] = "0";
$d["margin_left"] = "0";
$d["margin_top"] = "0";
$d["margin_bottom"] = "0";
$d["margin"] = "";
$d["max_height"] = "none";
$d["max_width"] = "none";
$d["min_height"] = "auto";
$d["min_width"] = "auto";
$d["orphans"] = "2";
$d["outline_color"] = "currentcolor"; // "invert" special color is not supported
$d["outline_style"] = "none";
$d["outline_width"] = "medium";
$d["outline_offset"] = "0";
$d["outline"] = "";
$d["overflow"] = "visible";
$d["overflow_wrap"] = "normal";
$d["padding_top"] = "0";
$d["padding_right"] = "0";
$d["padding_bottom"] = "0";
$d["padding_left"] = "0";
$d["padding"] = "";
$d["page_break_after"] = "auto";
$d["page_break_before"] = "auto";
$d["page_break_inside"] = "auto";
$d["pause_after"] = "0";
$d["pause_before"] = "0";
$d["pause"] = "";
$d["pitch_range"] = "50";
$d["pitch"] = "medium";
$d["play_during"] = "auto";
$d["position"] = "static";
$d["quotes"] = "auto";
$d["richness"] = "50";
$d["right"] = "auto";
$d["size"] = "auto"; // @page
$d["speak_header"] = "once";
$d["speak_numeral"] = "continuous";
$d["speak_punctuation"] = "none";
$d["speak"] = "normal";
$d["speech_rate"] = "medium";
$d["stress"] = "50";
$d["table_layout"] = "auto";
$d["text_align"] = "";
$d["text_decoration"] = "none";
$d["text_indent"] = "0";
$d["text_transform"] = "none";
$d["top"] = "auto";
$d["unicode_bidi"] = "normal";
$d["vertical_align"] = "baseline";
$d["visibility"] = "visible";
$d["voice_family"] = "";
$d["volume"] = "medium";
$d["white_space"] = "normal";
$d["widows"] = "2";
$d["width"] = "auto";
$d["word_spacing"] = "normal";
$d["z_index"] = "auto";
// CSS3
$d["opacity"] = "1.0";
$d["background_size"] = "auto auto";
$d["transform"] = "none";
$d["transform_origin"] = "50% 50%";
// for @font-face
$d["src"] = "";
$d["unicode_range"] = "";
// vendor-prefixed properties
$d["_dompdf_keep"] = "";
// Properties that inherit by default
self::$_inherited = [
"azimuth",
"background_image_resolution",
"border_collapse",
"border_spacing",
"caption_side",
"color",
"cursor",
"direction",
"elevation",
"empty_cells",
"font_family",
"font_size",
"font_style",
"font_variant",
"font_weight",
"font",
"image_resolution",
"letter_spacing",
"line_height",
"list_style_image",
"list_style_position",
"list_style_type",
"list_style",
"orphans",
"overflow_wrap",
"pitch_range",
"pitch",
"quotes",
"richness",
"speak_header",
"speak_numeral",
"speak_punctuation",
"speak",
"speech_rate",
"stress",
"text_align",
"text_indent",
"text_transform",
"visibility",
"voice_family",
"volume",
"white_space",
"widows",
"word_spacing",
];
// Compute dependent props from dependency map
foreach (self::$_dependency_map as $props) {
foreach ($props as $prop) {
self::$_dependent_props[$prop] = true;
}
}
// Compute valid display-type lookup table
self::$valid_display_types = [
"none" => true,
"-dompdf-br" => true,
"-dompdf-image" => true,
"-dompdf-list-bullet" => true,
"-dompdf-page" => true
];
foreach (self::BLOCK_LEVEL_TYPES as $val) {
self::$valid_display_types[$val] = true;
}
foreach (self::INLINE_LEVEL_TYPES as $val) {
self::$valid_display_types[$val] = true;
}
foreach (self::TABLE_INTERNAL_TYPES as $val) {
self::$valid_display_types[$val] = true;
}
}
}
/**
* "Destructor": forcibly free all references held by this object
*/
function dispose()
{
}
/**
* @param $media_queries
*/
function set_media_queries($media_queries)
{
$this->_media_queries = $media_queries;
}
/**
* @return array|int
*/
function get_media_queries()
{
return $this->_media_queries;
}
/**
* @param Frame $frame
*/
function set_frame(Frame $frame)
{
$this->_frame = $frame;
}
/**
* @return Frame
*/
function get_frame()
{
return $this->_frame;
}
/**
* @param $origin
*/
function set_origin($origin)
{
$this->_origin = $origin;
}
/**
* @return int
*/
function get_origin()
{
return $this->_origin;
}
/**
* returns the {@link Stylesheet} this Style is associated with.
*
* @return Stylesheet
*/
function get_stylesheet()
{
return $this->_stylesheet;
}
public function is_absolute(): bool
{
$position = $this->__get("position");
return $position === "absolute" || $position === "fixed";
}
public function is_in_flow(): bool
{
$float = $this->__get("float");
return $float === "none" && !$this->is_absolute();
}
/**
* Converts any CSS length value into an absolute length in points.
*
* length_in_pt() takes a single length (e.g. '1em') or an array of
* lengths and returns an absolute length. If an array is passed, then
* the return value is the sum of all elements. If any of the lengths
* provided are "auto" or "none" then that value is returned.
*
* If a reference size is not provided, the current font size is used.
*
* @param float|string|array $length The numeric length (or string measurement) or array of lengths to resolve.
* @param float|null $ref_size An absolute reference size to resolve percentage lengths.
*
* @return float|string
*/
function length_in_pt($length, ?float $ref_size = null)
{
$font_size = $this->__get("font_size");
$ref_size = $ref_size ?? $font_size;
if (!is_array($length)) {
$length = [$length];
}
$ret = 0.0;
foreach ($length as $l) {
if ($l === "auto" || $l === "none") {
return $l;
}
// Assume numeric values are already in points
if (is_numeric($l)) {
$ret += (float) $l;
continue;
}
$val = $this->single_length_in_pt((string) $l, $ref_size, $font_size);
// FIXME: Using the ref size as fallback here currently ensures that
// invalid widths or heights are treated as the corresponding
// containing-block dimension, which can look like the declaration
// is being ignored. Implement proper compute methods instead, and
// fall back to 0 here
$ret += $val ?? $ref_size;
}
return $ret;
}
/**
* Convert a length declaration to pt.
*
* @param string $l The length declaration.
* @param float $ref_size Reference size for percentage declarations.
* @param float|null $font_size Font size for resolving font-size relative units.
*
* @return float|null The length in pt, or `null` for invalid declarations.
*/
protected function single_length_in_pt(string $l, float $ref_size = 0, ?float $font_size = null): ?float
{
static $cache = [];
$font_size = $font_size ?? $this->__get("font_size");
$key = "$l/$ref_size/$font_size";
if (isset($cache[$key])) {
return $cache[$key];
}
if (is_numeric($l)) {
// Legacy support for unitless values, not covered by spec. Might
// want to restrict this to unitless `0` in the future
$value = (float) $l;
}
elseif (($i = mb_stripos($l, "%")) !== false) {
$value = (float)mb_substr($l, 0, $i) / 100 * $ref_size;
}
elseif (($i = mb_stripos($l, "px")) !== false) {
$dpi = $this->_stylesheet->get_dompdf()->getOptions()->getDpi();
$value = ((float)mb_substr($l, 0, $i) * 72) / $dpi;
}
elseif (($i = mb_stripos($l, "pt")) !== false) {
$value = (float)mb_substr($l, 0, $i);
}
elseif (($i = mb_stripos($l, "rem")) !== false) {
$root_style = $this->_stylesheet->get_dompdf()->getTree()->get_root()->get_style();
$root_font_size = $root_style === null || $root_style === $this
? $font_size
: $root_style->font_size;
$value = (float)mb_substr($l, 0, $i) * $root_font_size;
}
elseif (($i = mb_stripos($l, "em")) !== false) {
$value = (float)mb_substr($l, 0, $i) * $font_size;
}
elseif (($i = mb_stripos($l, "cm")) !== false) {
$value = (float)mb_substr($l, 0, $i) * 72 / 2.54;
}
elseif (($i = mb_stripos($l, "mm")) !== false) {
$value = (float)mb_substr($l, 0, $i) * 72 / 25.4;
}
elseif (($i = mb_stripos($l, "ex")) !== false) {
// FIXME: em:ex ratio?
$value = (float)mb_substr($l, 0, $i) * $font_size / 2;
}
elseif (($i = mb_stripos($l, "in")) !== false) {
$value = (float)mb_substr($l, 0, $i) * 72;
}
elseif (($i = mb_stripos($l, "pc")) !== false) {
$value = (float)mb_substr($l, 0, $i) * 12;
}
else {
// Invalid or unsupported declaration
$value = null;
}
return $cache[$key] = $value;
}
/**
* Resolve inherited property values using the provided parent style or the
* default values, in case no parent style exists.
*
* https://www.w3.org/TR/css-cascade-3/#inheriting
*
* @param Style|null $parent
*
* @return Style
*/
function inherit(?Style $parent = null)
{
$this->parent_style = $parent;
// Clear the computed font size, as it might depend on the parent
// font size
unset($this->_props_computed["font_size"]);
unset($this->_prop_cache["font_size"]);
if ($parent) {
foreach (self::$_inherited as $prop) {
// For properties that inherit by default: When the cascade did
// not result in a value, inherit the parent value. Inheritance
// is handled via the specific sub-properties for shorthands
if (isset($this->_props[$prop]) || isset(self::$_props_shorthand[$prop])) {
continue;
}
if (isset($parent->_props[$prop])) {
$parent_val = \array_key_exists($prop, $parent->_props_computed)
? $parent->_props_computed[$prop]
: $parent->compute_prop($prop, $parent->_props[$prop]);
$this->_props[$prop] = $parent_val;
$this->_props_computed[$prop] = $parent_val;
$this->_prop_cache[$prop] = null;
}
}
}
foreach ($this->_props as $prop => $val) {
if ($val === "inherit") {
if ($parent && isset($parent->_props[$prop])) {
$parent_val = \array_key_exists($prop, $parent->_props_computed)
? $parent->_props_computed[$prop]
: $parent->compute_prop($prop, $parent->_props[$prop]);
$this->_props[$prop] = $parent_val;
$this->_props_computed[$prop] = $parent_val;
$this->_prop_cache[$prop] = null;
} else {
// Parent prop not set, use default
$this->_props[$prop] = self::$_defaults[$prop];
unset($this->_props_computed[$prop]);
unset($this->_prop_cache[$prop]);
}
}
}
return $this;
}
/**
* Override properties in this style with those in $style
*
* @param Style $style
*/
function merge(Style $style)
{
foreach ($style->_props as $prop => $val) {
$important = isset($style->_important_props[$prop]);
// `!important` declarations take precedence over normal ones
if (!$important && isset($this->_important_props[$prop])) {
continue;
}
$computed = \array_key_exists($prop, $style->_props_computed)
? $style->_props_computed[$prop]
: $style->compute_prop($prop, $val);
// Skip invalid declarations. Because styles are merged into an
// initially empty style object during stylesheet loading, this
// handles all invalid declarations
if ($computed === null) {
continue;
}
if ($important) {
$this->_important_props[$prop] = true;
}
$this->_props[$prop] = $val;
// Don't use the computed value for dependent properties; they will
// be computed on-demand during inheritance or property access
// instead
if (isset(self::$_dependent_props[$prop])) {
unset($this->_props_computed[$prop]);
unset($this->_prop_cache[$prop]);
} else {
$this->_props_computed[$prop] = $computed;
$this->_prop_cache[$prop] = null;
}
}
}
/**
* Returns an array(r, g, b, "r"=> r, "g"=>g, "b"=>b, "alpha"=>alpha, "hex"=>"#rrggbb")
* based on the provided CSS color value.
*
* @param string $color
* @return array|string|null
*/
function munge_color($color)
{
return Color::parse($color);
}
/**
* @deprecated
* @param string $prop
*/
function important_set($prop)
{
$prop = str_replace("-", "_", $prop);
$this->_important_props[$prop] = true;
}
/**
* @deprecated
* @param string $prop
* @return bool
*/
function important_get($prop)
{
return isset($this->_important_props[$prop]);
}
/**
* Clear information about important declarations after the style has been
* finalized during stylesheet loading.
*/
public function clear_important(): void
{
$this->_important_props = [];
}
/**
* Set the specified value of a property.
*
* Setting `$clear_dependencies` to `false` is useful for saving a bit of
* unnecessary work while loading stylesheets.
*
* @param string $prop The property to set.
* @param mixed $val The value declaration.
* @param bool $important Whether the declaration is important.
* @param bool $clear_dependencies Whether to clear computed values of dependent properties.
*/
function set_prop(string $prop, $val, bool $important = false, bool $clear_dependencies = true): void
{
$prop = str_replace("-", "_", $prop);
// Legacy property aliases
if (isset(self::$_props_alias[$prop])) {
$prop = self::$_props_alias[$prop];
}
if (!isset(self::$_defaults[$prop])) {
global $_dompdf_warnings;
$_dompdf_warnings[] = "'$prop' is not a recognized CSS property.";
return;
}
if ($prop !== "content" && is_string($val) && mb_strpos($val, "url") === false && strlen($val) > 1) {
$val = mb_strtolower(trim(str_replace(["\n", "\t"], [" "], $val)));
$val = preg_replace("/([0-9]+) (pt|px|pc|rem|em|ex|in|cm|mm|%)/S", "\\1\\2", $val);
}
if (isset(self::$_props_shorthand[$prop])) {
// Shorthand properties directly set their respective sub-properties
// https://www.w3.org/TR/css-cascade-3/#shorthand
if ($val === "initial" || $val === "inherit" || $val === "unset") {
foreach (self::$_props_shorthand[$prop] as $sub_prop) {
$this->set_prop($sub_prop, $val, $important, $clear_dependencies);
}
} else {
$method = "set_$prop";
if (!isset(self::$_methods_cache[$method])) {
self::$_methods_cache[$method] = method_exists($this, $method);
}
if (self::$_methods_cache[$method]) {
$this->$method($val, $important);
}
}
} else {
// `!important` declarations take precedence over normal ones
if (!$important && isset($this->_important_props[$prop])) {
return;
}
if ($important) {
$this->_important_props[$prop] = true;
}
// https://www.w3.org/TR/css-cascade-3/#inherit-initial
if ($val === "unset") {
$val = in_array($prop, self::$_inherited, true)
? "inherit"
: "initial";
}
// https://www.w3.org/TR/css-cascade-3/#valdef-all-initial
if ($val === "initial") {
$val = self::$_defaults[$prop];
}
$this->_props[$prop] = $val;
unset($this->_props_computed[$prop]);
unset($this->_prop_cache[$prop]);
if ($clear_dependencies) {
// Clear the computed values of any dependent properties, so
// they can be re-computed
if (isset(self::$_dependency_map[$prop])) {
foreach (self::$_dependency_map[$prop] as $dependent) {
unset($this->_props_computed[$dependent]);
unset($this->_prop_cache[$dependent]);
}
}
// Clear border-radius cache on setting any border-radius
// property
if ($prop === "border_top_left_radius"
|| $prop === "border_top_right_radius"
|| $prop === "border_bottom_left_radius"
|| $prop === "border_bottom_right_radius"
) {
$this->has_border_radius_cache = null;
}
}
// FIXME: temporary hack around lack of persistence of base href for
// URLs. Compute value immediately, before the original base href is
// no longer available
if ($prop === "background_image" || $prop === "list_style_image") {
$this->compute_prop($prop, $val);
}
}
}
/**
* Similar to __get() without storing the result. Useful for accessing
* properties while loading stylesheets.
*
* @param string $prop
*
* @return mixed
* @throws Exception
*/
function get_prop(string $prop)
{
// Legacy property aliases
if (isset(self::$_props_alias[$prop])) {
$prop = self::$_props_alias[$prop];
}
if (!isset(self::$_defaults[$prop])) {
throw new Exception("'$prop' is not a recognized CSS property.");
}
$method = "get_$prop";
if (isset($this->_props_computed[$prop])) {
if (method_exists($this, $method)) {
return $this->$method();
}
return $this->_props_computed[$prop];
}
// Fall back on defaults if property is not set
return $this->_props[$prop] ?? self::$_defaults[$prop];
}
/**
* PHP5 overloaded setter
*
* This function along with {@link Style::__get()} permit a user of the
* Style class to access any (CSS) property using the following syntax:
* <code>
* Style->margin_top = "1em";
* echo (Style->margin_top);
* </code>
*
* __set() automatically calls the provided set function, if one exists,
* otherwise it sets the property directly. Typically, __set() is not
* called directly from outside of this class.
*
* On each modification clear cache to return accurate setting.
* Also affects direct settings not using __set
* For easier finding all assignments, attempted to allowing only explicite assignment:
* Very many uses, e.g. AbstractFrameReflower.php -> for now leave as it is
* function __set($prop, $val) {
* throw new Exception("Implicit replacement of assignment by __set. Not good.");
* }
* function props_set($prop, $val) { ... }
*
* @param string $prop the property to set
* @param mixed $val the value of the property
*
*/
function __set($prop, $val)
{
$this->set_prop($prop, $val);
}
/**
* PHP5 overloaded getter
* Along with {@link Style::__set()} __get() provides access to all CSS
* properties directly. Typically __get() is not called directly outside
* of this class.
* On each modification clear cache to return accurate setting.
* Also affects direct settings not using __set
*
* @param string $prop
*
* @return mixed
* @throws Exception
*/
function __get($prop)
{
// Legacy property aliases
if (isset(self::$_props_alias[$prop])) {
$prop = self::$_props_alias[$prop];
}
if (!isset(self::$_defaults[$prop])) {
throw new Exception("'$prop' is not a recognized CSS property.");
}
if (isset($this->_prop_cache[$prop])) {
return $this->_prop_cache[$prop];
}
$method = "get_$prop";
if (!isset(self::$_methods_cache[$method])) {
self::$_methods_cache[$method] = method_exists($this, $method);
}
if (isset(self::$_props_shorthand[$prop])) {
// Don't cache shorthand values, always use getter. If no dedicated
// getter exists, use a simple fallback getter concatenating all
// sub-property values
if (self::$_methods_cache[$method]) {
return $this->$method();
} else {
return implode(" ", array_map(function ($sub_prop) {
$val = $this->__get($sub_prop);
return is_array($val) ? implode(" ", $val) : $val;
}, self::$_props_shorthand[$prop]));
}
} else {
// Compute the value if needed
if (!\array_key_exists($prop, $this->_props_computed)) {
$val = $this->_props[$prop] ?? self::$_defaults[$prop];
$this->compute_prop($prop, $val);
}
// Invalid declarations are skipped on style merge, but during
// style parsing, styles might contain invalid declarations. Fall
// back to the default value in that case
$computed = $this->_props_computed[$prop]
?? $this->compute_prop($prop, self::$_defaults[$prop]);
$used = self::$_methods_cache[$method]
? $this->$method()
: $computed;
$this->_prop_cache[$prop] = $used;
return $used;
}
}
/**
* Experimental fast setter for used values.
*
* If a shorthand property is specified, all of its sub-properties are set
* to the same value.
*
* @param string $prop
* @param mixed $val
*/
function set_used(string $prop, $val): void
{
// Legacy property aliases
if (isset(self::$_props_alias[$prop])) {
$prop = self::$_props_alias[$prop];
}
if (!isset(self::$_defaults[$prop])) {
throw new Exception("'$prop' is not a recognized CSS property.");
}
if (isset(self::$_props_shorthand[$prop])) {
foreach (self::$_props_shorthand[$prop] as $sub_prop) {
$this->set_used($sub_prop, $val);
}
} else {
$this->_prop_cache[$prop] = $val;
}
}
/**
* @param string $prop The property to compute.
* @param mixed $val The value to compute.
*
* @return mixed The computed value.
*/
protected function compute_prop(string $prop, $val)
{
$this->_props_computed[$prop] = null;
$this->_prop_cache[$prop] = null;
$method = "set_$prop";
if (!isset(self::$_methods_cache[$method])) {
self::$_methods_cache[$method] = method_exists($this, $method);
}
// During style merge, the parent style is not available yet, so
// temporarily use the initial value for `inherit` properties. The
// keyword is properly resolved during inheritance
if ($val === "inherit") {
$val = self::$_defaults[$prop];
}
if (self::$_methods_cache[$method]) {
$this->$method($val);
} elseif ($val !== "") {
$this->_props_computed[$prop] = $val;
}
return $this->_props_computed[$prop];
}
/**
* @param float $cbw The width of the containing block.
* @return float|null|string
*/
function computed_bottom_spacing(float $cbw)
{
// Caching the bottom spacing independently of the given width is a bit
// iffy, but should be okay, as the containing block should only
// potentially change after a page break, and the style is reset in that
// case
if ($this->_computed_bottom_spacing !== null) {
return $this->_computed_bottom_spacing;
}
return $this->_computed_bottom_spacing = $this->length_in_pt(
[
$this->margin_bottom,
$this->padding_bottom,
$this->border_bottom_width
],
$cbw
);
}
/**
* @return string
*/
function get_font_family_raw()
{
return trim($this->_props["font_family"], " \t\n\r\x0B\"'");
}
/**
* Getter for the 'font-family' CSS property.
* Uses the {@link FontMetrics} class to resolve the font family into an
* actual font file.
*
* @link http://www.w3.org/TR/CSS21/fonts.html#propdef-font-family
* @throws Exception
*
* @return string
*/
function get_font_family()
{
//TODO: we should be using the calculated prop rather than perform the entire family parsing operation again
$DEBUGCSS = $this->_stylesheet->get_dompdf()->getOptions()->getDebugCss();
// Select the appropriate font. First determine the subtype, then check
// the specified font-families for a candidate.
// Resolve font-weight
$weight = $this->__get("font_weight");
if ($weight === 'bold') {
$weight = 700;
} elseif (preg_match('/^[0-9]+$/', $weight, $match)) {
$weight = (int)$match[0];
} else {
$weight = 400;
}
// Resolve font-style
$font_style = $this->__get("font_style");
$subtype = $this->getFontMetrics()->getType($weight . ' ' . $font_style);
$families = preg_split("/\s*,\s*/", $this->_props_computed["font_family"]);
$font = null;
foreach ($families as $family) {
//remove leading and trailing string delimiters, e.g. on font names with spaces;
//remove leading and trailing whitespace
$family = trim($family, " \t\n\r\x0B\"'");
if ($DEBUGCSS) {
print '(' . $family . ')';
}
$font = $this->getFontMetrics()->getFont($family, $subtype);
if ($font) {
if ($DEBUGCSS) {
print "<pre>[get_font_family:";
print '(' . $this->_props_computed["font_family"] . '.' . $font_style . '.' . $weight . '.' . $subtype . ')';
print '(' . $font . ")get_font_family]\n</pre>";
}
return $font;
}
}
$family = null;
if ($DEBUGCSS) {
print '(default)';
}
$font = $this->getFontMetrics()->getFont($family, $subtype);
if ($font) {
if ($DEBUGCSS) {
print '(' . $font . ")get_font_family]\n</pre>";
}
return $font;
}
throw new Exception("Unable to find a suitable font replacement for: '" . $this->_props_computed["font_family"] . "'");
}
/**
* @link http://www.w3.org/TR/CSS21/text.html#propdef-word-spacing
* @return float
*/
function get_word_spacing()
{
$word_spacing = $this->_props_computed["word_spacing"];
if ($word_spacing === "normal") {
return 0;
}
if (strpos($word_spacing, "%") !== false) {
return $word_spacing;
}
return (float)$this->length_in_pt($word_spacing, $this->__get("font_size"));
}
/**
* @link http://www.w3.org/TR/CSS21/text.html#propdef-letter-spacing
* @return float
*/
function get_letter_spacing()
{
$letter_spacing = $this->_props_computed["letter_spacing"];
if ($letter_spacing === "normal") {
return 0;
}
return (float)$this->length_in_pt($letter_spacing, $this->__get("font_size"));
}
/**
* @link http://www.w3.org/TR/CSS21/visudet.html#propdef-line-height
* @return float
*/
function get_line_height()
{
$line_height = $this->_props_computed["line_height"];
if ($line_height === "normal") {
return self::$default_line_height * $this->__get("font_size");
}
if (is_numeric($line_height)) {
return $line_height * $this->__get("font_size");
}
return (float)$this->length_in_pt($line_height, $this->__get("font_size"));
}
/**
* @param string $prop
* @param bool $current_is_parent
* @return array|string
*/
protected function get_prop_color(string $prop, bool $current_is_parent = false)
{
$val = $this->_props_computed[$prop];
if ($val === "currentcolor") {
// https://www.w3.org/TR/css-color-4/#resolving-other-colors
if ($current_is_parent) {
// Use the `color` value from the parent for the `color`
// property itself
return isset($this->parent_style)
? $this->parent_style->__get("color")
: $this->munge_color(self::$_defaults[$prop]);
}
return $this->__get("color");
}
return $this->munge_color($val) ?? "transparent";
}
/**
* Returns the color as an array
*
* The array has the following format:
* <code>array(r,g,b, "r" => r, "g" => g, "b" => b, "hex" => "#rrggbb")</code>
*
* @link http://www.w3.org/TR/CSS21/colors.html#propdef-color
* @return array
*/
function get_color()
{
return $this->get_prop_color("color", true);
}
/**
* Returns the background color as an array
*
* The returned array has the same format as {@link Style::get_color()}
*
* @link http://www.w3.org/TR/CSS21/colors.html#propdef-background-color
* @return array
*/
function get_background_color()
{
return $this->get_prop_color("background_color");
}
/**
* Returns the background image URI, or "none"
*
* @link https://www.w3.org/TR/CSS21/colors.html#propdef-background-image
* @return string
*/
function get_background_image()
{
return $this->_stylesheet->resolve_url($this->_props_computed["background_image"]);
}
/**
* Returns the background position as an array
*
* The returned array has the following format:
* <code>array(x,y, "x" => x, "y" => y)</code>
*
* @link http://www.w3.org/TR/CSS21/colors.html#propdef-background-position
* @return array
*/
function get_background_position()
{
$tmp = explode(" ", $this->_props_computed["background_position"]);
return [
0 => $tmp[0], "x" => $tmp[0],
1 => $tmp[1], "y" => $tmp[1],
];
}
/**
* Returns the background size as an array
*
* The return value has one of the following formats:
* <code>"cover"</code>
* <code>"contain"</code>
* <code>array(width,height)</code>
*
* @link https://www.w3.org/TR/css3-background/#background-size
* @return string|array
*/
function get_background_size()
{
switch ($this->_props_computed["background_size"]) {
case "cover":
return "cover";
case "contain":
return "contain";
default:
break;
}
$result = explode(" ", $this->_props_computed["background_size"]);
return [$result[0], $result[1]];
}
/**#@+
* Returns the border color as an array
*
* See {@link Style::get_color()}
*
* @link http://www.w3.org/TR/CSS21/box.html#border-color-properties
* @return array
*/
function get_border_top_color()
{
return $this->get_prop_color("border_top_color");
}
/**
* @return array
*/
function get_border_right_color()
{
return $this->get_prop_color("border_right_color");
}
/**
* @return array
*/
function get_border_bottom_color()
{
return $this->get_prop_color("border_bottom_color");
}
/**
* @return array
*/
function get_border_left_color()
{
return $this->get_prop_color("border_left_color");
}
/**#@-*/
/**
* Return an array of all border properties.
*
* The returned array has the following structure:
* <code>
* array("top" => array("width" => [border-width],
* "style" => [border-style],
* "color" => [border-color (array)]),
* "bottom" ... )
* </code>
*
* @return array
*/
function get_border_properties()
{
return [
"top" => [
"width" => $this->__get("border_top_width"),
"style" => $this->__get("border_top_style"),
"color" => $this->__get("border_top_color"),
],
"bottom" => [
"width" => $this->__get("border_bottom_width"),
"style" => $this->__get("border_bottom_style"),
"color" => $this->__get("border_bottom_color"),
],
"right" => [
"width" => $this->__get("border_right_width"),
"style" => $this->__get("border_right_style"),
"color" => $this->__get("border_right_color"),
],
"left" => [
"width" => $this->__get("border_left_width"),
"style" => $this->__get("border_left_style"),
"color" => $this->__get("border_left_color"),
],
];
}
/**
* Return a single border property
*
* @param string $side
*
* @return mixed
*/
protected function _get_border($side)
{
$color = $this->__get("border_" . $side . "_color");
return $this->__get("border_" . $side . "_width") . " " .
$this->__get("border_" . $side . "_style") . " " .
(is_array($color) ? $color["hex"] : $color);
}
/**#@+
* Return full border properties as a string
*
* Border properties are returned just as specified in CSS:
* <pre>[width] [style] [color]</pre>
* e.g. "1px solid blue"
*
* @link http://www.w3.org/TR/CSS21/box.html#border-shorthand-properties
* @return string
*/
function get_border_top()
{
return $this->_get_border("top");
}
/**
* @return mixed
*/
function get_border_right()
{
return $this->_get_border("right");
}
/**
* @return mixed
*/
function get_border_bottom()
{
return $this->_get_border("bottom");
}
/**
* @return mixed
*/
function get_border_left()
{
return $this->_get_border("left");
}
/**
* @deprecated
* @param float $w
* @param float $h
* @return float[]
*/
function get_computed_border_radius($w, $h)
{
return $this->resolve_border_radius([0, 0, $w, $h]);
}
public function has_border_radius(): bool
{
if (isset($this->has_border_radius_cache)) {
return $this->has_border_radius_cache;
}
// Use a fixed ref size here. We don't know the border-box width here
// and font size might be 0. Since we are only interested in whether
// there is any border radius at all, this should do
$tl = (float) $this->length_in_pt($this->border_top_left_radius, 10);
$tr = (float) $this->length_in_pt($this->border_top_right_radius, 10);
$br = (float) $this->length_in_pt($this->border_bottom_right_radius, 10);
$bl = (float) $this->length_in_pt($this->border_bottom_left_radius, 10);
$this->has_border_radius_cache = $tl + $tr + $br + $bl > 0;
return $this->has_border_radius_cache;
}
/**
* Get the final border-radius values to use.
*
* Percentage values are resolved relative to the width of the border box.
* The border radius is additionally scaled for the given render box, and
* constrained by its width and height.
*
* @param float[] $border_box The border box of the frame.
* @param float[]|null $render_box The box to resolve the border radius for.
*
* @return float[] A 4-tuple of top-left, top-right, bottom-right, and bottom-left radius.
*/
public function resolve_border_radius(
array $border_box,
?array $render_box = null
): array {
$render_box = $render_box ?? $border_box;
$use_cache = $render_box === $border_box;
if ($use_cache && isset($this->resolved_border_radius)) {
return $this->resolved_border_radius;
}
[$x, $y, $w, $h] = $border_box;
// Resolve percentages relative to width, as long as we have no support
// for per-axis radii
$tl = (float) $this->length_in_pt($this->border_top_left_radius, $w);
$tr = (float) $this->length_in_pt($this->border_top_right_radius, $w);
$br = (float) $this->length_in_pt($this->border_bottom_right_radius, $w);
$bl = (float) $this->length_in_pt($this->border_bottom_left_radius, $w);
if ($tl + $tr + $br + $bl > 0) {
[$rx, $ry, $rw, $rh] = $render_box;
$t_offset = $y - $ry;
$r_offset = $rx + $rw - $x - $w;
$b_offset = $ry + $rh - $y - $h;
$l_offset = $x - $rx;
if ($tl > 0) {
$tl = max($tl + ($t_offset + $l_offset) / 2, 0);
}
if ($tr > 0) {
$tr = max($tr + ($t_offset + $r_offset) / 2, 0);
}
if ($br > 0) {
$br = max($br + ($b_offset + $r_offset) / 2, 0);
}
if ($bl > 0) {
$bl = max($bl + ($b_offset + $l_offset) / 2, 0);
}
if ($tl + $bl > $rh) {
$f = $rh / ($tl + $bl);
$tl = $f * $tl;
$bl = $f * $bl;
}
if ($tr + $br > $rh) {
$f = $rh / ($tr + $br);
$tr = $f * $tr;
$br = $f * $br;
}
if ($tl + $tr > $rw) {
$f = $rw / ($tl + $tr);
$tl = $f * $tl;
$tr = $f * $tr;
}
if ($bl + $br > $rw) {
$f = $rw / ($bl + $br);
$bl = $f * $bl;
$br = $f * $br;
}
}
$values = [$tl, $tr, $br, $bl];
if ($use_cache) {
$this->resolved_border_radius = $values;
}
return $values;
}
/**
* Returns the outline color as an array
*
* See {@link Style::get_color()}
*
* @link http://www.w3.org/TR/CSS21/box.html#border-color-properties
* @return array
*/
function get_outline_color()
{
return $this->get_prop_color("outline_color");
}
/**
* Return full outline properties as a string
*
* Outline properties are returned just as specified in CSS:
* <pre>[width] [style] [color]</pre>
* e.g. "1px solid blue"
*
* @link http://www.w3.org/TR/CSS21/box.html#border-shorthand-properties
* @return string
*/
function get_outline()
{
$color = $this->__get("outline_color");
return $this->__get("outline_width") . " " .
$this->__get("outline_style") . " " .
(is_array($color) ? $color["hex"] : $color);
}
/**
* Returns border spacing as an array
*
* The array has the format (h_space,v_space)
*
* @link http://www.w3.org/TR/CSS21/tables.html#propdef-border-spacing
* @return array
*/
function get_border_spacing()
{
$arr = explode(" ", $this->_props_computed["border_spacing"]);
if (count($arr) == 1) {
$arr[1] = $arr[0];
}
return $arr;
}
/**
* Returns the list style image URI, or "none"
*
* @link http://www.w3.org/TR/CSS21/generate.html#propdef-list-style-image
* @return string
*/
function get_list_style_image()
{
return $this->_stylesheet->resolve_url($this->_props_computed["list_style_image"]);
}
/**
* @param string $value
* @param int $default
*
* @return array|string
*/
protected function parse_counter_prop(string $value, int $default)
{
$ident = self::CSS_IDENTIFIER;
$integer = self::CSS_INTEGER;
$pattern = "/($ident)(?:\s+($integer))?/";
if (!preg_match_all($pattern, $value, $matches, PREG_SET_ORDER)) {
return "none";
}
$counters = [];
foreach ($matches as $match) {
$counter = $match[1];
$value = isset($match[2]) ? (int) $match[2] : $default;
$counters[$counter] = $value;
}
return $counters;
}
/**
* @return array|string
*/
function get_counter_increment()
{
$val = $this->_props_computed["counter_increment"];
if ($val === "none" || $val === "inherit") {
return "none";
}
return $this->parse_counter_prop($val, 1);
}
/**
* @return array|string
*/
protected function get_counter_reset()
{
$val = $this->_props_computed["counter_reset"];
if ($val === "none") {
return "none";
}
return $this->parse_counter_prop($val, 0);
}
/**
* @return string[]|string
*/
protected function get_content()
{
$val = $this->_props_computed["content"];
if ($val === "normal" || $val === "none") {
return $val;
}
return $this->parse_property_value($val);
}
/*==============================*/
/**
* Parse a property value into its components.
*
* @param string $value
*
* @return string[]
*/
protected function parse_property_value(string $value): array
{
$ident = self::CSS_IDENTIFIER;
$number = self::CSS_NUMBER;
$pattern = "/\n" .
"\s* \" ( (?:[^\"]|\\\\[\"])* ) (?<!\\\\)\" |\n" . // String ""
"\s* ' ( (?:[^']|\\\\['])* ) (?<!\\\\)' |\n" . // String ''
"\s* ($ident \\([^)]*\\) ) |\n" . // Functional
"\s* ($ident) |\n" . // Keyword
"\s* (\#[0-9a-fA-F]*) |\n" . // Hex value
"\s* ($number [a-zA-Z%]*) |\n" . // Number (+ unit/percentage)
"\s* ([\/,;]) \n" . // Delimiter
"/Sx";
if (!preg_match_all($pattern, $value, $matches)) {
return [];
}
return array_map("trim", $matches[0]);
}
protected function is_color_value(string $val): bool
{
return $val === "currentcolor"
|| $val === "transparent"
|| isset(Color::$cssColorNames[$val])
|| preg_match("/^#|rgb\(|rgba\(|cmyk\(/", $val);
}
protected function prop_name(string $style, string $side, string $type): string
{
$prop = $style;
if ($side !== "") {
$prop .= "_" . $side;
};
if ($type !== "") {
$prop .= "_" . $type;
};
return $prop;
}
/**
* Generalized set function for individual attribute of combined style.
*
* Applicable for margin, border, padding, outline.
*
* @param string $style
* @param string $side
* @param string $type
* @param mixed $val
*/
protected function _set_style_side_type($style, $side, $type, $val)
{
$prop = $this->prop_name($style, $side, $type);
$this->_prop_cache[$prop] = null;
if ($val === "inherit") {
$this->_props_computed[$prop] = null;
return;
}
if ($side === "bottom") {
$this->_computed_bottom_spacing = null; //reset computed cache, border style can disable/enable border calculations
}
if ($type === "color") {
$this->set_prop_color($prop, $val);
} elseif (($style === "border" || $style === "outline") && $type === "width") {
// Border-width keywords
if ($val === "thin") {
$val_computed = 0.5;
} elseif ($val === "medium") {
$val_computed = 1.5;
} elseif ($val === "thick") {
$val_computed = 2.5;
} elseif (mb_strpos($val, "%") !== false) {
$val_computed = null;
} else {
$val_computed = $this->single_length_in_pt($val);
if ($val_computed < 0) {
$val_computed = null;
}
}
if ($val_computed === null) {
$this->_props_computed[$prop] = null;
} else {
$line_style_prop = $this->prop_name($style, $side, "style");
$line_style = $this->__get($line_style_prop);
$has_line_style = $line_style !== "none" && $line_style !== "hidden";
$this->_props_computed[$prop] = $has_line_style ? $val_computed : 0;
}
} elseif (($style === "border" || $style === "outline") && $type === "style") {
if (in_array($val, Style::$BORDER_STYLES, true)) {
$this->_props_computed[$prop] = $val;
} else {
$this->_props_computed[$prop] = null;
}
} elseif ($style === "margin" || $style === "padding") {
if ($val === "none") {
// Legacy support for `none` keyword, not covered by spec
$val_computed = 0;
} elseif ($style === "margin" && $val === "auto") {
$val_computed = $val;
} elseif (mb_strpos($val, "%") !== false) {
$val_computed = $val;
} else {
$val_computed = $this->single_length_in_pt($val);
if ($style === "padding" && $val_computed < 0) {
$val_computed = null;
}
}
$this->_props_computed[$prop] = $val_computed;
} elseif ($val !== "") {
$this->_props_computed[$prop] = $val;
} else {
$this->_props_computed[$prop] = null;
}
}
/**
* @param string $style
* @param string $type
* @param mixed $val
* @param bool $important
*/
protected function _set_style_type($style, $type, $val, $important)
{
$v = $this->parse_property_value($val);
switch (count($v)) {
case 1:
[$top, $right, $bottom, $left] = [$v[0], $v[0], $v[0], $v[0]];
break;
case 2:
[$top, $right, $bottom, $left] = [$v[0], $v[1], $v[0], $v[1]];
break;
case 3:
[$top, $right, $bottom, $left] = [$v[0], $v[1], $v[2], $v[1]];
break;
case 4:
[$top, $right, $bottom, $left] = [$v[0], $v[1], $v[2], $v[3]];
break;
default:
return;
}
$this->set_prop($this->prop_name($style, "top", $type), $top, $important);
$this->set_prop($this->prop_name($style, "right", $type), $right, $important);
$this->set_prop($this->prop_name($style, "bottom", $type), $bottom, $important);
$this->set_prop($this->prop_name($style, "left", $type), $left, $important);
}
/*======================*/
/**
* https://www.w3.org/TR/CSS21/visuren.html#display-prop
*
* @param string $val
*/
protected function set_display(string $val): void
{
// Make sure that common valid, but unsupported display types have an
// appropriate fallback display type
switch ($val) {
case "flow-root":
case "flex":
case "grid":
case "table-caption":
$val = "block";
break;
case "inline-flex":
case "inline-grid":
$val = "inline-block";
break;
}
if (!isset(self::$valid_display_types[$val])) {
return;
}
// https://www.w3.org/TR/CSS21/visuren.html#dis-pos-flo
if ($this->is_in_flow()) {
$computed = $val;
} else {
switch ($val) {
case "inline":
case "inline-block":
// case "table-row-group":
// case "table-header-group":
// case "table-footer-group":
// case "table-row":
// case "table-cell":
// case "table-column-group":
// case "table-column":
// case "table-caption":
$computed = "block";
break;
case "inline-table":
$computed = "table";
break;
default:
$computed = $val;
break;
}
}
$this->_props_computed["display"] = $computed;
}
protected function set_prop_color($prop, $val)
{
$this->_prop_cache[$prop] = null;
// https://www.w3.org/TR/css-color-4/#resolving-other-colors
$munged_color = $val !== "currentcolor"
? $this->munge_color($val)
: $val;
if (is_null($munged_color)) {
$this->_props_computed[$prop] = null;
return;
}
$this->_props_computed[$prop] = is_array($munged_color) ? $munged_color["hex"] : $munged_color;
}
/**
* Sets color
*
* The color parameter can be any valid CSS color value
*
* @link http://www.w3.org/TR/CSS21/colors.html#propdef-color
* @param string $color
*/
function set_color($color)
{
$this->set_prop_color("color", $color);
}
/**
* Sets the background color
*
* @link http://www.w3.org/TR/CSS21/colors.html#propdef-background-color
* @param string $color
*/
function set_background_color($color)
{
$this->set_prop_color("background_color", $color);
}
/**
* Set the background image url
* @link https://www.w3.org/TR/CSS21/colors.html#propdef-background-image
*
* @param string $val
*/
function set_background_image($val)
{
$this->_prop_cache["background_image"] = null;
$parsed_val = $this->_stylesheet->resolve_url($val);
if ($parsed_val === "none") {
$this->_props_computed["background_image"] = "none";
} else {
$this->_props_computed["background_image"] = "url(" . $parsed_val . ")";
}
}
/**
* Sets the background repeat
*
* @link http://www.w3.org/TR/CSS21/colors.html#propdef-background-repeat
* @param string $val
*/
function set_background_repeat($val)
{
$this->_prop_cache["background_repeat"] = null;
if ($val === "inherit") {
$this->_props_computed["background_repeat"] = null;
return;
}
$this->_props_computed["background_repeat"] = $val;
}
/**
* Sets the background attachment
*
* @link http://www.w3.org/TR/CSS21/colors.html#propdef-background-attachment
* @param string $val
*/
function set_background_attachment($val)
{
$this->_prop_cache["background_attachment"] = null;
if ($val === "inherit") {
$this->_props_computed["background_attachment"] = null;
return;
}
$this->_props_computed["background_attachment"] = $val;
}
/**
* Sets the background position
*
* @link http://www.w3.org/TR/CSS21/colors.html#propdef-background-position
* @param string $val
*/
function set_background_position($val)
{
$this->_prop_cache["background_position"] = null;
$tmp = explode(" ", $val);
switch ($tmp[0]) {
case "left":
$x = "0%";
break;
case "right":
$x = "100%";
break;
case "top":
$y = "0%";
break;
case "bottom":
$y = "100%";
break;
case "center":
$x = "50%";
$y = "50%";
break;
default:
$x = $tmp[0];
break;
}
if (isset($tmp[1])) {
switch ($tmp[1]) {
case "left":
$x = "0%";
break;
case "right":
$x = "100%";
break;
case "top":
$y = "0%";
break;
case "bottom":
$y = "100%";
break;
case "center":
if ($tmp[0] === "left" || $tmp[0] === "right" || $tmp[0] === "center") {
$y = "50%";
} else {
$x = "50%";
}
break;
default:
$y = $tmp[1];
break;
}
} else {
$y = "50%";
}
if (!isset($x)) {
$x = "0%";
}
if (!isset($y)) {
$y = "0%";
}
$this->_props_computed["background_position"] = "$x $y";
}
/**
* Sets the background size
*
* @link https://www.w3.org/TR/css3-background/#background-size
* @param string $val
*/
function set_background_size($val)
{
$this->_prop_cache["background_size"] = null;
$result = explode(" ", $val);
$width = $result[0];
switch ($width) {
case "cover":
case "contain":
$this->_props_computed["background_size"] = $width;
return;
case "inherit":
$this->_props_computed["background_size"] = null;
return;
}
if ($width !== "auto" && strpos($width, "%") === false) {
$width = (float)$this->length_in_pt($width);
}
$height = $result[1] ?? "auto";
if ($height !== "auto" && strpos($height, "%") === false) {
$height = (float)$this->length_in_pt($height);
}
$this->_props_computed["background_size"] = "$width $height";
}
/**
* Sets the background - combined options
*
* @link http://www.w3.org/TR/CSS21/colors.html#propdef-background
* @param string $value
* @param bool $important
*/
function set_background($value, bool $important = false)
{
if ($value === "none") {
$this->set_prop("background_image", "none", $important);
$this->set_prop("background_color", "transparent", $important);
} else {
$components = $this->parse_property_value($value);
$pos_size = [];
foreach ($components as $val) {
if ($val === "none" || mb_substr($val, 0, 4) === "url(") {
$this->set_prop("background_image", $val, $important);
} elseif ($val === "fixed" || $val === "scroll") {
$this->set_prop("background_attachment", $val, $important);
} elseif ($val === "repeat" || $val === "repeat-x" || $val === "repeat-y" || $val === "no-repeat") {
$this->set_prop("background_repeat", $val, $important);
} elseif ($this->is_color_value($val)) {
$this->set_prop("background_color", $val, $important);
} else {
$pos_size[] = $val;
}
}
if (count($pos_size)) {
// Split value list at "/"
$index = array_search("/", $pos_size, true);
if ($index !== false) {
$pos = array_slice($pos_size, 0, $index);
$size = array_slice($pos_size, $index + 1);
} else {
$pos = $pos_size;
$size = [];
}
$this->set_prop("background_position", implode(" ", $pos), $important);
if (count($size)) {
$this->set_prop("background_size", implode(" ", $size), $important);
}
}
}
}
/**
* Sets the font size
*
* $size can be any acceptable CSS size
*
* @link http://www.w3.org/TR/CSS21/fonts.html#propdef-font-size
* @param string|float $size
*/
function set_font_size($size)
{
$this->_prop_cache["font_size"] = null;
if ($size === "inherit") {
$this->_props_computed["font_size"] = null;
return;
}
$parent_font_size = isset($this->parent_style)
? $this->parent_style->__get("font_size")
: self::$default_font_size;
switch ((string)$size) {
case "xx-small":
case "x-small":
case "small":
case "medium":
case "large":
case "x-large":
case "xx-large":
$fs = self::$default_font_size * self::$font_size_keywords[$size];
break;
case "smaller":
$fs = 8 / 9 * $parent_font_size;
break;
case "larger":
$fs = 6 / 5 * $parent_font_size;
break;
default:
$fs = $this->single_length_in_pt($size, $parent_font_size, $parent_font_size);
break;
}
$this->_props_computed["font_size"] = $fs;
}
/**
* Sets the font weight
*
* @param string|int $weight
*/
function set_font_weight($weight)
{
$this->_prop_cache["font_weight"] = null;
if ($weight === "inherit") {
$this->_props_computed["font_weight"] = null;
return;
}
$computed_weight = $weight;
if ($weight === "bolder") {
//TODO: One font weight heavier than the parent element (among the available weights of the font).
$computed_weight = "bold";
} elseif ($weight === "lighter") {
//TODO: One font weight lighter than the parent element (among the available weights of the font).
$computed_weight = "normal";
}
$this->_props_computed["font_weight"] = $computed_weight;
}
/**
* Sets the font style
*
* combined attributes
* set individual attributes also, respecting !important mark
* exactly this order, separate by space. Multiple fonts separated by comma:
* font-style, font-variant, font-weight, font-size, line-height, font-family
*
* Other than with border and list, existing partial attributes should
* reset when starting here, even when not mentioned.
* If individual attribute is !important and explicit or implicit replacement is not,
* keep individual attribute
*
* require whitespace as delimiters for single value attributes
* On delimiter "/" treat first as font height, second as line height
* treat all remaining at the end of line as font
* font-style, font-variant, font-weight, font-size, line-height, font-family
*
* missing font-size and font-family might be not allowed, but accept it here and
* use default (medium size, empty font name)
*
* @link https://www.w3.org/TR/CSS21/fonts.html#font-shorthand
* @param string $val
* @param bool $important
*/
function set_font($val, bool $important = false)
{
if (preg_match("/^(italic|oblique|normal)\s*(.*)$/i", $val, $match)) {
$this->set_prop("font_style", $match[1], $important);
$val = $match[2];
}
if (preg_match("/^(small-caps|normal)\s*(.*)$/i", $val, $match)) {
$this->set_prop("font_variant", $match[1], $important);
$val = $match[2];
}
//matching numeric value followed by unit -> this is indeed a subsequent font size. Skip!
if (preg_match("/^(bold|bolder|lighter|100|200|300|400|500|600|700|800|900|normal)\s*(.*)$/i", $val, $match) &&
!preg_match("/^(?:pt|px|pc|rem|em|ex|in|cm|mm|%)/", $match[2])
) {
$this->set_prop("font_weight", $match[1], $important);
$val = $match[2];
}
if (preg_match("/^(xx-small|x-small|small|medium|large|x-large|xx-large|smaller|larger|\d+\s*(?:pt|px|pc|rem|em|ex|in|cm|mm|%))(?:\/|\s*)(.*)$/i", $val, $match)) {
$this->set_prop("font_size", $match[1], $important);
$val = $match[2];
if (preg_match("/^(?:\/|\s*)(\d+\s*(?:pt|px|pc|rem|em|ex|in|cm|mm|%)?)\s*(.*)$/i", $val, $match)) {
$this->set_prop("line_height", $match[1], $important);
$val = $match[2];
}
}
if (strlen($val) != 0) {
$this->set_prop("font_family", $val, $important);
}
}
/**
* Sets the text alignment
*
* If no alignment is set on the element and the direction is rtl then
* the property is set to "right", otherwise it is set to "left".
*
* @link https://www.w3.org/TR/CSS21/text.html#propdef-text-align
*/
public function set_text_align($val)
{
$this->_prop_cache["text_align"] = null;
$alignment = $val;
if ($alignment === "") {
$alignment = "left";
if ($this->__get("direction") === "rtl") {
$alignment = "right";
}
}
if (!in_array($alignment, self::$text_align_keywords, true)) {
$this->_props_computed["text_align"] = null;
return;
}
$this->_props_computed["text_align"] = $alignment;
}
/**
* Sets word spacing property
*
* @link http://www.w3.org/TR/CSS21/text.html#propdef-word-spacing
* @param $val
*/
function set_word_spacing($val)
{
$this->_prop_cache["word_spacing"] = null;
if ($val === "inherit") {
$this->_props_computed["word_spacing"] = null;
return;
}
if ($val === "normal" || strpos($val, "%") !== false) {
$this->_props_computed["word_spacing"] = $val;
} else {
$this->_props_computed["word_spacing"] = ((float)$this->length_in_pt($val, $this->__get("font_size"))) . "pt";
}
}
/**
* Sets letter spacing property
*
* @link http://www.w3.org/TR/CSS21/text.html#propdef-letter-spacing
* @param $val
*/
function set_letter_spacing($val)
{
$this->_prop_cache["letter_spacing"] = null;
if ($val === "inherit") {
$this->_props_computed["letter_spacing"] = null;
return;
}
if ($val === "normal") {
$this->_props_computed["letter_spacing"] = $val;
} else {
$this->_props_computed["letter_spacing"] = ((float)$this->length_in_pt($val, $this->__get("font_size"))) . "pt";
}
}
/**
* Sets line height property
*
* @link http://www.w3.org/TR/CSS21/visudet.html#propdef-line-height
* @param $val
*/
function set_line_height($val)
{
$this->_prop_cache["line_height"] = null;
if ($val === "inherit") {
$this->_props_computed["line_height"] = null;
return;
}
if ($val === "normal" || is_numeric($val)) {
$this->_props_computed["line_height"] = $val;
} else {
$this->_props_computed["line_height"] = ((float)$this->length_in_pt($val, $this->__get("font_size"))) . "pt";
}
}
/**
* Sets page break properties
*
* @link http://www.w3.org/TR/CSS21/page.html#page-breaks
* @param string $break
*/
function set_page_break_before($break)
{
$this->_prop_cache["page_break_before"] = null;
if ($break === "inherit") {
$this->_props_computed["page_break_before"] = null;
return;
}
if ($break === "left" || $break === "right") {
$break = "always";
}
$this->_props_computed["page_break_before"] = $break;
}
/**
* @param $break
*/
function set_page_break_after($break)
{
$this->_prop_cache["page_break_after"] = null;
if ($break === "inherit") {
$this->_props_computed["page_break_after"] = null;
return;
}
if ($break === "left" || $break === "right") {
$break = "always";
}
$this->_props_computed["page_break_after"] = $break;
}
/**
* Sets the margin size
*
* @link http://www.w3.org/TR/CSS21/box.html#margin-properties
* @param $val
*/
function set_margin_top($val)
{
$this->_set_style_side_type("margin", "top", "", $val);
}
/**
* @param $val
*/
function set_margin_right($val)
{
$this->_set_style_side_type("margin", "right", "", $val);
}
/**
* @param $val
*/
function set_margin_bottom($val)
{
$this->_set_style_side_type("margin", "bottom", "", $val);
}
/**
* @param $val
*/
function set_margin_left($val)
{
$this->_set_style_side_type("margin", "left", "", $val);
}
/**
* @param string $val
* @param bool $important
*/
function set_margin($val, bool $important = false)
{
$this->_set_style_type("margin", "", $val, $important);
}
/**
* Sets the padding size
*
* @link http://www.w3.org/TR/CSS21/box.html#padding-properties
* @param $val
*/
function set_padding_top($val)
{
$this->_set_style_side_type("padding", "top", "", $val);
}
/**
* @param $val
*/
function set_padding_right($val)
{
$this->_set_style_side_type("padding", "right", "", $val);
}
/**
* @param $val
*/
function set_padding_bottom($val)
{
$this->_set_style_side_type("padding", "bottom", "", $val);
}
/**
* @param $val
*/
function set_padding_left($val)
{
$this->_set_style_side_type("padding", "left", "", $val);
}
/**
* @param string $val
* @param bool $important
*/
function set_padding($val, bool $important = false)
{
$this->_set_style_type("padding", "", $val, $important);
}
/**
* Sets a single border
*
* @param string $side
* @param string $border_spec ([width] [style] [color])
* @param bool $important
*/
protected function _set_border($side, $border_spec, bool $important)
{
$components = $this->parse_property_value($border_spec);
foreach ($components as $val) {
if (in_array($val, self::$BORDER_STYLES, true)) {
$this->set_prop("border_${side}_style", $val, $important);
} elseif ($this->is_color_value($val)) {
$this->set_prop("border_${side}_color", $val, $important);
} else {
// Assume width
$this->set_prop("border_${side}_width", $val, $important);
}
}
}
/**
* @link http://www.w3.org/TR/CSS21/box.html#border-properties
* @param string $val
* @param bool $important
*/
function set_border_top($val, bool $important = false)
{
$this->_set_border("top", $val, $important);
}
function set_border_top_color($val)
{
$this->_set_style_side_type("border", "top", "color", $val);
}
function set_border_top_style($val)
{
$this->_set_style_side_type("border", "top", "style", $val);
}
function set_border_top_width($val)
{
$this->_set_style_side_type("border", "top", "width", $val);
}
/**
* @param string $val
* @param bool $important
*/
function set_border_right($val, bool $important = false)
{
$this->_set_border("right", $val, $important);
}
function set_border_right_color($val)
{
$this->_set_style_side_type("border", "right", "color", $val);
}
function set_border_right_style($val)
{
$this->_set_style_side_type("border", "right", "style", $val);
}
function set_border_right_width($val)
{
$this->_set_style_side_type("border", "right", "width", $val);
}
/**
* @param string $val
* @param bool $important
*/
function set_border_bottom($val, bool $important = false)
{
$this->_set_border("bottom", $val, $important);
}
function set_border_bottom_color($val)
{
$this->_set_style_side_type("border", "bottom", "color", $val);
}
function set_border_bottom_style($val)
{
$this->_set_style_side_type("border", "bottom", "style", $val);
}
function set_border_bottom_width($val)
{
$this->_set_style_side_type("border", "bottom", "width", $val);
}
/**
* @param string $val
* @param bool $important
*/
function set_border_left($val, bool $important = false)
{
$this->_set_border("left", $val, $important);
}
function set_border_left_color($val)
{
$this->_set_style_side_type("border", "left", "color", $val);
}
function set_border_left_style($val)
{
$this->_set_style_side_type("border", "left", "style", $val);
}
function set_border_left_width($val)
{
$this->_set_style_side_type("border", "left", "width", $val);
}
/**
* @param string $val
* @param bool $important
*/
function set_border($val, bool $important = false)
{
$this->_set_border("top", $val, $important);
$this->_set_border("right", $val, $important);
$this->_set_border("bottom", $val, $important);
$this->_set_border("left", $val, $important);
}
/**
* @param string $val
* @param bool $important
*/
function set_border_width($val, bool $important = false)
{
$this->_set_style_type("border", "width", $val, $important);
}
/**
* @param string $val
* @param bool $important
*/
function set_border_color($val, bool $important = false)
{
$this->_set_style_type("border", "color", $val, $important);
}
/**
* @param string $val
* @param bool $important
*/
function set_border_style($val, bool $important = false)
{
$this->_set_style_type("border", "style", $val, $important);
}
/**
* Sets the border radius size
*
* http://www.w3.org/TR/css3-background/#corners
*
* @param string $val
*/
function set_border_top_left_radius($val)
{
$this->_set_border_radius_corner($val, "top_left");
}
/**
* @param string $val
*/
function set_border_top_right_radius($val)
{
$this->_set_border_radius_corner($val, "top_right");
}
/**
* @param string $val
*/
function set_border_bottom_left_radius($val)
{
$this->_set_border_radius_corner($val, "bottom_left");
}
/**
* @param string $val
*/
function set_border_bottom_right_radius($val)
{
$this->_set_border_radius_corner($val, "bottom_right");
}
/**
* @param string $val
* @param bool $important
*/
function set_border_radius($val, bool $important = false)
{
$r = $this->parse_property_value($val);
switch (count($r)) {
case 1:
[$tl, $tr, $br, $bl] = [$r[0], $r[0], $r[0], $r[0]];
break;
case 2:
[$tl, $tr, $br, $bl] = [$r[0], $r[1], $r[0], $r[1]];
break;
case 3:
[$tl, $tr, $br, $bl] = [$r[0], $r[1], $r[2], $r[1]];
break;
case 4:
[$tl, $tr, $br, $bl] = [$r[0], $r[1], $r[2], $r[3]];
break;
default:
return;
}
$this->set_prop("border_top_left_radius", $tl, $important);
$this->set_prop("border_top_right_radius", $tr, $important);
$this->set_prop("border_bottom_right_radius", $br, $important);
$this->set_prop("border_bottom_left_radius", $bl, $important);
}
/**
* @param string $val
* @param string $corner
*/
protected function _set_border_radius_corner($val, $corner)
{
$prop = "border_" . $corner . "_radius";
$this->_prop_cache[$prop] = null;
if ($val === "inherit") {
$this->_props_computed[$prop] = null;
return;
}
$computed = mb_strpos($val, "%") === false
? $this->single_length_in_pt($val)
: $val;
$this->_props_computed[$prop] = $computed;
}
/**
* @return float|int|string
*/
function get_border_top_left_radius()
{
return $this->_get_border_radius_corner("top_left");
}
/**
* @return float|int|string
*/
function get_border_top_right_radius()
{
return $this->_get_border_radius_corner("top_right");
}
/**
* @return float|int|string
*/
function get_border_bottom_left_radius()
{
return $this->_get_border_radius_corner("bottom_left");
}
/**
* @return float|int|string
*/
function get_border_bottom_right_radius()
{
return $this->_get_border_radius_corner("bottom_right");
}
/**
* @param $corner
* @return float|int|string
*/
protected function _get_border_radius_corner($corner)
{
$prop = "border_" . $corner . "_radius";
if (!isset($this->_props_computed[$prop])) {
return 0;
}
return $this->_props_computed[$prop];
}
/**
* Sets the outline styles
*
* @link http://www.w3.org/TR/CSS21/ui.html#dynamic-outlines
* @param string $value
* @param bool $important
*/
function set_outline($value, bool $important = false)
{
$components = $this->parse_property_value($value);
foreach ($components as $val) {
if (in_array($val, self::$BORDER_STYLES, true)) {
$this->set_prop("outline_style", $val, $important);
} elseif ($this->is_color_value($val)) {
$this->set_prop("outline_color", $val, $important);
} else {
// Assume width
$this->set_prop("outline_width", $val, $important);
}
}
}
/**
* @param $val
*/
function set_outline_width($val)
{
$this->_set_style_side_type("outline", "", "width", $val);
}
/**
* @param $val
*/
function set_outline_color($val)
{
$this->_set_style_side_type("outline", "", "color", $val);
}
/**
* @param $val
*/
function set_outline_style($val)
{
$this->_set_style_side_type("outline", "", "style", $val);
}
/**
* Sets the border spacing
*
* @link http://www.w3.org/TR/CSS21/box.html#border-properties
* @param float $val
*/
function set_border_spacing($val)
{
$this->_prop_cache["border_spacing"] = null;
if ($val === "inherit") {
$this->_props_computed["border_spacing"] = null;
return;
}
$arr = explode(" ", $val);
if (count($arr) === 1) {
$arr[1] = $arr[0];
}
$this->_props_computed["border_spacing"] = "$arr[0] $arr[1]";
}
/**
* Sets the list style image
*
* @link http://www.w3.org/TR/CSS21/generate.html#propdef-list-style-image
* @param $val
*/
function set_list_style_image($val)
{
$this->_prop_cache["list_style_image"] = null;
if ($val === "inherit") {
$this->_props_computed["list_style_image"] = null;
return;
}
$parsed_val = $this->_stylesheet->resolve_url($val);
if ($parsed_val === "none") {
$this->_props_computed["list_style_image"] = "none";
} else {
$this->_props_computed["list_style_image"] = "url(" . $parsed_val . ")";
}
}
/**
* Sets the list style
*
* @link http://www.w3.org/TR/CSS21/generate.html#propdef-list-style
* @param string $value
* @param bool $important
*/
function set_list_style($value, bool $important = false)
{
static $positions = ["inside", "outside"];
static $types = [
"disc", "circle", "square",
"decimal-leading-zero", "decimal", "1",
"lower-roman", "upper-roman", "a", "A",
"lower-greek",
"lower-latin", "upper-latin",
"lower-alpha", "upper-alpha",
"armenian", "georgian", "hebrew",
"cjk-ideographic", "hiragana", "katakana",
"hiragana-iroha", "katakana-iroha", "none"
];
$components = $this->parse_property_value($value);
foreach ($components as $val) {
/* http://www.w3.org/TR/CSS21/generate.html#list-style
* A value of 'none' for the 'list-style' property sets both 'list-style-type' and 'list-style-image' to 'none'
*/
if ($val === "none") {
$this->set_prop("list_style_type", $val, $important);
$this->set_prop("list_style_image", $val, $important);
continue;
}
//On setting or merging or inheriting list_style_image as well as list_style_type,
//and url exists, then url has precedence, otherwise fall back to list_style_type
//Firefox is wrong here (list_style_image gets overwritten on explicit list_style_type)
//Internet Explorer 7/8 and dompdf is right.
if (mb_substr($val, 0, 4) === "url(") {
$this->set_prop("list_style_image", $val, $important);
continue;
}
if (in_array($val, $types, true)) {
$this->set_prop("list_style_type", $val, $important);
} elseif (in_array($val, $positions, true)) {
$this->set_prop("list_style_position", $val, $important);
}
}
}
/**
* @param $val
*/
function set_size($val)
{
$this->_prop_cache["size"] = null;
$length_re = "/(\d+\s*(?:pt|px|pc|rem|em|ex|in|cm|mm|%))/";
$val = mb_strtolower($val);
if ($val === "auto") {
$this->_props_computed["size"] = $val;
return;
}
$parts = preg_split("/\s+/", $val);
$computed = [];
if (preg_match($length_re, $parts[0])) {
$computed[] = $this->length_in_pt($parts[0]);
if (isset($parts[1]) && preg_match($length_re, $parts[1])) {
$computed[] = $this->length_in_pt($parts[1]);
} else {
$computed[] = $computed[0];
}
if (isset($parts[2]) && $parts[2] === "landscape") {
$computed = array_reverse($computed);
}
} elseif (isset(CPDF::$PAPER_SIZES[$parts[0]])) {
$computed = array_slice(CPDF::$PAPER_SIZES[$parts[0]], 2, 2);
if (isset($parts[1]) && $parts[1] === "landscape") {
$computed = array_reverse($computed);
}
} else {
$this->_props_computed["size"] = null;
return;
}
$this->_props_computed["size"] = $computed;
}
/**
* Gets the CSS3 transform property
*
* @link http://www.w3.org/TR/css3-2d-transforms/#transform-property
* @return array|null
*/
function get_transform()
{
//TODO: should be handled in setter (lengths set to absolute)
$number = "\s*([^,\s]+)\s*";
$tr_value = "\s*([^,\s]+)\s*";
$angle = "\s*([^,\s]+(?:deg|rad)?)\s*";
if (!preg_match_all("/[a-z]+\([^\)]+\)/i", $this->_props_computed["transform"], $parts, PREG_SET_ORDER)) {
return null;
}
$functions = [
//"matrix" => "\($number,$number,$number,$number,$number,$number\)",
"translate" => "\($tr_value(?:,$tr_value)?\)",
"translateX" => "\($tr_value\)",
"translateY" => "\($tr_value\)",
"scale" => "\($number(?:,$number)?\)",
"scaleX" => "\($number\)",
"scaleY" => "\($number\)",
"rotate" => "\($angle\)",
"skew" => "\($angle(?:,$angle)?\)",
"skewX" => "\($angle\)",
"skewY" => "\($angle\)",
];
$transforms = [];
foreach ($parts as $part) {
$t = $part[0];
foreach ($functions as $name => $pattern) {
if (preg_match("/$name\s*$pattern/i", $t, $matches)) {
$values = array_slice($matches, 1);
switch ($name) {
// <angle> units
case "rotate":
case "skew":
case "skewX":
case "skewY":
foreach ($values as $i => $value) {
if (strpos($value, "rad")) {
$values[$i] = rad2deg(floatval($value));
} else {
$values[$i] = floatval($value);
}
}
switch ($name) {
case "skew":
if (!isset($values[1])) {
$values[1] = 0;
}
break;
case "skewX":
$name = "skew";
$values = [$values[0], 0];
break;
case "skewY":
$name = "skew";
$values = [0, $values[0]];
break;
}
break;
// <translation-value> units
case "translate":
$values[0] = $this->length_in_pt($values[0], (float)$this->length_in_pt($this->width));
if (isset($values[1])) {
$values[1] = $this->length_in_pt($values[1], (float)$this->length_in_pt($this->height));
} else {
$values[1] = 0;
}
break;
case "translateX":
$name = "translate";
$values = [$this->length_in_pt($values[0], (float)$this->length_in_pt($this->width)), 0];
break;
case "translateY":
$name = "translate";
$values = [0, $this->length_in_pt($values[0], (float)$this->length_in_pt($this->height))];
break;
// <number> units
case "scale":
if (!isset($values[1])) {
$values[1] = $values[0];
}
break;
case "scaleX":
$name = "scale";
$values = [$values[0], 1.0];
break;
case "scaleY":
$name = "scale";
$values = [1.0, $values[0]];
break;
}
$transforms[] = [
$name,
$values,
];
}
}
}
return $transforms;
}
/**
* @param $val
*/
function set_transform($val)
{
$this->_prop_cache["transform"] = null;
if ($val === "inherit") {
$this->_props_computed["transform"] = null;
return;
}
$this->_props_computed["transform"] = $val;
}
/**
* Sets the CSS3 transform-origin property
*
* @link http://www.w3.org/TR/css3-2d-transforms/#transform-origin
* @param string $val
*/
function set_transform_origin($val)
{
$this->_prop_cache["transform_origin"] = null;
if ($val === "inherit") {
$this->_props_computed["transform_origin"] = null;
return;
}
$this->_props_computed["transform_origin"] = $val;
}
/**
* Gets the CSS3 transform-origin property
*
* @link http://www.w3.org/TR/css3-2d-transforms/#transform-origin
* @return mixed[]
*/
function get_transform_origin()
{
//TODO: should be handled in setter
$values = preg_split("/\s+/", $this->_props_computed["transform_origin"]);
$values = array_map(function ($value) {
if (in_array($value, ["top", "left"])) {
return 0;
} else if (in_array($value, ["bottom", "right"])) {
return "100%";
} else {
return $value;
}
}, $values);
if (!isset($values[1])) {
$values[1] = $values[0];
}
return $values;
}
/**
* @param $val
* @return null
*/
protected function parse_image_resolution($val)
{
// If exif data could be get:
// $re = '/^\s*(\d+|normal|auto)(?:\s*,\s*(\d+|normal))?\s*$/';
$re = '/^\s*(\d+|normal|auto)\s*$/';
if (!preg_match($re, $val, $matches)) {
return null;
}
return $matches[1];
}
/**
* auto | normal | dpi
*
* @param $val
*/
function set_background_image_resolution($val)
{
$this->_prop_cache["background_image_resolution"] = null;
if ($val === "inherit") {
$this->_props_computed["background_image_resolution"] = null;
return;
}
$parsed = $this->parse_image_resolution($val);
$this->_props_computed["background_image_resolution"] = $parsed;
}
/**
* auto | normal | dpi
*
* @param $val
*/
function set_image_resolution($val)
{
$this->_prop_cache["image_resolution"] = null;
if ($val === "inherit") {
$this->_props_computed["image_resolution"] = null;
return;
}
$parsed = $this->parse_image_resolution($val);
$this->_props_computed["image_resolution"] = $parsed;
}
/**
* @param $val
*/
function set_z_index($val)
{
$this->_prop_cache["z_index"] = null;
if ($val === "inherit") {
$this->_props_computed["z_index"] = null;
return;
}
if ($val !== "auto" && round((float) $val) != $val) {
$this->_props_computed["z_index"] = null;
return;
}
$this->_props_computed["z_index"] = $val;
}
/**
* @param FontMetrics $fontMetrics
* @return $this
*/
public function setFontMetrics(FontMetrics $fontMetrics)
{
$this->fontMetrics = $fontMetrics;
return $this;
}
/**
* @return FontMetrics
*/
public function getFontMetrics()
{
return $this->fontMetrics;
}
/**
* Generate a string representation of the Style
*
* This dumps the entire property array into a string via print_r. Useful
* for debugging.
*
* @return string
*/
/*DEBUGCSS print: see below additional debugging util*/
function __toString()
{
$parent_font_size = $this->parent_style
? $this->parent_style->font_size
: self::$default_font_size;
return print_r(array_merge(["parent_font_size" => $parent_font_size ],
$this->_props), true);
}
/*DEBUGCSS*/
function debug_print()
{
$parent_font_size = $this->parent_style
? $this->parent_style->font_size
: self::$default_font_size;
print " parent_font_size:" . $parent_font_size . ";\n";
print " Props [\n";
print " specified [\n";
foreach ($this->_props as $prop => $val) {
print ' ' . $prop . ': ' . preg_replace("/\r\n/", ' ', print_r($val, true));
if (isset($this->_important_props[$prop])) {
print ' !important';
}
print ";\n";
}
print " ]\n";
print " computed [\n";
foreach ($this->_props_computed as $prop => $val) {
print ' ' . $prop . ': ' . preg_replace("/\r\n/", ' ', print_r($val, true));
print ";\n";
}
print " ]\n";
print " cached [\n";
foreach ($this->_prop_cache as $prop => $val) {
print ' ' . $prop . ': ' . preg_replace("/\r\n/", ' ', print_r($val, true));
print ";\n";
}
print " ]\n";
print " ]\n";
}
}
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