* @version 0.5.1.htischer.20090507
* - Specifity of css selector chain was too small because leading whitespace
* to be counted as number of elements was removed
* - On parsing css properties accept and register !important attribute
* - Add optional debug output
* @version 20090610
* - _parse_properties on style property name and value remove augmenting superflous
* space for consistent parsing, in particular combined values like background
*/
/* $Id: stylesheet.cls.php 216 2010-03-11 22:49:18Z ryan.masten $ */
/**
* The location of the default built-in CSS file.
* {@link Stylesheet::DEFAULT_STYLESHEET}
*/
define('__DEFAULT_STYLESHEET', DOMPDF_LIB_DIR . DIRECTORY_SEPARATOR . "res" . DIRECTORY_SEPARATOR . "html.css");
/**
* The master stylesheet class
*
* The Stylesheet class is responsible for parsing stylesheets and style
* tags/attributes. It also acts as a registry of the individual Style
* objects generated by the current set of loaded CSS files and style
* elements.
*
* @see Style
* @package dompdf
*/
class Stylesheet {
/**
* the location of the default built-in CSS file.
*
*/
const DEFAULT_STYLESHEET = __DEFAULT_STYLESHEET; // Hack: can't
// concatenate stuff in
// const declarations,
// but I can do this?
// protected members
/**
* array of currently defined styles
* @var array
*/
private $_styles;
/**
* base protocol of the document being parsed
*
* Used to handle relative urls.
*
* @var string
*/
private $_protocol;
/**
* base hostname of the document being parsed
*
* Used to handle relative urls.
* @var string
*/
private $_base_host;
/**
* base path of the document being parsed
*
* Used to handle relative urls.
* @var string
*/
private $_base_path;
/**
* the style defined by @page rules
*
* @var Style
*/
private $_page_style;
/**
* list of loaded files, used to prevent recursion
*
* @var array
*/
private $_loaded_files;
/**
* accepted CSS media types
* List of types and parsing rules for future extensions:
* http://www.w3.org/TR/REC-html40/types.html
* screen, tty, tv, projection, handheld, print, braille, aural, all
* The following are non standard extensions for undocumented specific environments.
* static, visual, bitmap, paged
* Note, even though the generated pdf file is intended for print output,
* the desired content might be different (e.g. screen or projection view of html file).
* Therefore allow specification of content by dompdf setting DOMPDF_DEFAULT_MEDIA_TYPE.
* If given, replace media "print" by DOMPDF_DEFAULT_MEDIA_TYPE.
* (Previous version $ACCEPTED_MEDIA_TYPES = $ACCEPTED_GENERIC_MEDIA_TYPES + $ACCEPTED_DEFAULT_MEDIA_TYPE)
*/
static $ACCEPTED_DEFAULT_MEDIA_TYPE = "print";
static $ACCEPTED_GENERIC_MEDIA_TYPES = array("all", "static", "visual", "bitmap", "paged");
/**
* The class constructor.
*
* The base protocol, host & path are initialized to those of
* the current script.
*/
function __construct() {
$this->_styles = array();
$this->_loaded_files = array();
list($this->_protocol, $this->_base_host, $this->_base_path) = explode_url($_SERVER["SCRIPT_FILENAME"]);
$this->_page_style = null;
}
/**
* Set the base protocol
*
* @param string $proto
*/
function set_protocol($proto) { $this->_protocol = $proto; }
/**
* Set the base host
*
* @param string $host
*/
function set_host($host) { $this->_base_host = $host; }
/**
* Set the base path
*
* @param string $path
*/
function set_base_path($path) { $this->_base_path = $path; }
/**
* Return the base protocol for this stylesheet
*
* @return string
*/
function get_protocol() { return $this->_protocol; }
/**
* Return the base host for this stylesheet
*
* @return string
*/
function get_host() { return $this->_base_host; }
/**
* Return the base path for this stylesheet
*
* @return string
*/
function get_base_path() { return $this->_base_path; }
/**
* add a new Style object to the stylesheet
*
* add_style() adds a new Style object to the current stylesheet, or
* merges a new Style with an existing one.
*
* @param string $key the Style's selector
* @param Style $style the Style to be added
*/
function add_style($key, Style $style) {
if (!is_string($key))
throw new DOMPDF_Exception("CSS rule must be keyed by a string.");
if ( isset($this->_styles[$key]) )
$this->_styles[$key]->merge($style);
else
$this->_styles[$key] = clone $style;
}
/**
* lookup a specifc Style object
*
* lookup() returns the Style specified by $key, or null if the Style is
* not found.
*
* @param string $key the selector of the requested Style
* @return Style
*/
function lookup($key) {
if ( !isset($this->_styles[$key]) )
return null;
return $this->_styles[$key];
}
/**
* create a new Style object associated with this stylesheet
*
* @param Style $parent The style of this style's parent in the DOM tree
* @return Style
*/
function create_style($parent = null) {
return new Style($this, $parent);
}
/**
* load and parse a CSS string
*
* @param string $css
*/
function load_css(&$css) { $this->_parse_css($css); }
/**
* load and parse a CSS file
*
* @param string $file
*/
function load_css_file($file) {
global $_dompdf_warnings;
// Prevent circular references
if ( isset($this->_loaded_files[$file]) )
return;
$this->_loaded_files[$file] = true;
$parsed_url = explode_url($file);
list($this->_protocol, $this->_base_host, $this->_base_path, $filename) = $parsed_url;
if ( !DOMPDF_ENABLE_REMOTE &&
($this->_protocol != "" && $this->_protocol !== "file://") ) {
record_warnings(E_USER_WARNING, "Remote CSS file '$file' requested, but DOMPDF_ENABLE_REMOTE is false.", __FILE__, __LINE__);
return;
}
// Fix submitted by Nick Oostveen for aliased directory support:
if ( $this->_protocol == "" )
$file = $this->_base_path . $filename;
else
$file = build_url($this->_protocol, $this->_base_host, $this->_base_path, $filename);
set_error_handler("record_warnings");
$css = file_get_contents($file);
restore_error_handler();
if ( $css == "" ) {
record_warnings(E_USER_WARNING, "Unable to load css file $file", __FILE__, __LINE__);;
return;
}
$this->_parse_css($css);
}
/**
* @link http://www.w3.org/TR/CSS21/cascade.html#specificity}
*
* @param string $selector
* @return int
*/
private function _specificity($selector) {
// http://www.w3.org/TR/CSS21/cascade.html#specificity
// ignoring the ":" pseudoclass modifyers
// also ignored in _css_selector_to_xpath
$a = ($selector === "!style attribute") ? 1 : 0;
$b = min(mb_substr_count($selector, "#"), 255);
$c = min(mb_substr_count($selector, ".") +
mb_substr_count($selector, ">") +
mb_substr_count($selector, "+"), 255);
$d = min(mb_substr_count($selector, " "), 255);
//If a normal element name is at the begining of the string,
//a leading whitespace might have been removed on whitespace collapsing and removal
//therefore there might be one whitespace less as selected element names
//this can lead to a too small specificity
//see _css_selector_to_xpath
if ( !in_array($selector[0], array(" ", ">", ".", "#", "+", ":", "[")) ) {
$d++;
}
if (DEBUGCSS) {
/*DEBUGCSS*/ print "\n";
/*DEBUGCSS*/ printf("_specificity(): 0x%08x \"%s\"\n", ($a << 24) | ($b << 16) | ($c << 8) | ($d), $selector);
/*DEBUGCSS*/ print "";
}
return ($a << 24) | ($b << 16) | ($c << 8) | ($d);
}
/**
* converts a CSS selector to an XPath query.
*
* @param string $selector
* @return string
*/
private function _css_selector_to_xpath($selector) {
// Collapse white space and strip whitespace around delimiters
// $search = array("/\\s+/", "/\\s+([.>#+:])\\s+/");
// $replace = array(" ", "\\1");
// $selector = preg_replace($search, $replace, trim($selector));
// Initial query (non-absolute)
$query = "//";
// Parse the selector
//$s = preg_split("/([ :>.#+])/", $selector, -1, PREG_SPLIT_DELIM_CAPTURE);
$delimiters = array(" ", ">", ".", "#", "+", ":", "[");
// Add an implicit space at the beginning of the selector if there is no
// delimiter there already.
if ( !in_array($selector[0], $delimiters) )
$selector = " $selector";
$tok = "";
$len = mb_strlen($selector);
$i = 0;
while ( $i < $len ) {
$s = $selector[$i];
$i++;
// Eat characters up to the next delimiter
$tok = "";
while ($i < $len) {
if ( in_array($selector[$i], $delimiters) )
break;
$tok .= $selector[$i++];
}
switch ($s) {
case " ":
case ">":
// All elements matching the next token that are direct children of
// the current token
$expr = $s === " " ? "descendant" : "child";
if ( mb_substr($query, -1, 1) !== "/" )
$query .= "/";
if ( !$tok )
$tok = "*";
$query .= "$expr::$tok";
$tok = "";
break;
case ".":
case "#":
// All elements matching the current token with a class/id equal to
// the _next_ token.
$attr = $s === "." ? "class" : "id";
// empty class/id == *
if ( mb_substr($query, -1, 1) === "/" )
$query .= "*";
// Match multiple classes: $tok contains the current selected
// class. Search for class attributes with class="$tok",
// class=".* $tok .*" and class=".* $tok"
// This doesn't work because libxml only supports XPath 1.0...
//$query .= "[matches(@$attr,\"^${tok}\$|^${tok}[ ]+|[ ]+${tok}\$|[ ]+${tok}[ ]+\")]";
// Query improvement by Michael Sheakoski :
$query .= "[contains(concat(' ', @$attr, ' '), concat(' ', '$tok', ' '))]";
$tok = "";
break;
case "+":
// All sibling elements that folow the current token
if ( mb_substr($query, -1, 1) !== "/" )
$query .= "/";
$query .= "following-sibling::$tok";
$tok = "";
break;
case ":":
// Pseudo-classes
switch ($tok) {
case "first-child":
$query .= "[1]";
$tok = "";
break;
case "link":
$query .= "[@href]";
$tok = "";
break;
case "first-line":
break;
case "first-letter":
break;
case "before":
break;
case "after":
break;
}
break;
case "[":
// Attribute selectors. All with an attribute matching the following token(s)
$attr_delimiters = array("=", "]", "~", "|");
$tok_len = mb_strlen($tok);
$j = 0;
$attr = "";
$op = "";
$value = "";
while ( $j < $tok_len ) {
if ( in_array($tok[$j], $attr_delimiters) )
break;
$attr .= $tok[$j++];
}
switch ( $tok[$j] ) {
case "~":
case "|":
$op .= $tok[$j++];
if ( $tok[$j] !== "=" )
throw new DOMPDF_Exception("Invalid CSS selector syntax: invalid attribute selector: $selector");
$op .= $tok[$j];
break;
case "=":
$op = "=";
break;
}
// Read the attribute value, if required
if ( $op != "" ) {
$j++;
while ( $j < $tok_len ) {
if ( $tok[$j] === "]" )
break;
$value .= $tok[$j++];
}
}
if ( $attr == "" )
throw new DOMPDF_Exception("Invalid CSS selector syntax: missing attribute name");
switch ( $op ) {
case "":
$query .= "[@$attr]";
break;
case "=":
$query .= "[@$attr$op\"$value\"]";
break;
case "~=":
// FIXME: this will break if $value contains quoted strings
// (e.g. [type~="a b c" "d e f"])
$values = explode(" ", $value);
$query .= "[";
foreach ( $values as $val )
$query .= "@$attr=\"$val\" or ";
$query = rtrim($query, " or ") . "]";
break;
case "|=":
$values = explode("-", $value);
$query .= "[";
foreach ($values as $val)
$query .= "starts-with(@$attr, \"$val\") or ";
$query = rtrim($query, " or ") . "]";
break;
}
break;
}
}
$i++;
// case ":":
// // Pseudo selectors: ignore for now. Partially handled directly
// // below.
// // Skip until the next special character, leaving the token as-is
// while ( $i < $len ) {
// if ( in_array($selector[$i], $delimiters) )
// break;
// $i++;
// }
// break;
// default:
// // Add the character to the token
// $tok .= $selector[$i++];
// break;
// }
// }
// Trim the trailing '/' from the query
if ( mb_strlen($query) > 2 )
$query = rtrim($query, "/");
return $query;
}
/**
* applies all current styles to a particular document tree
*
* apply_styles() applies all currently loaded styles to the provided
* {@link Frame_Tree}. Aside from parsing CSS, this is the main purpose
* of this class.
*
* @param Frame_Tree $tree
*/
function apply_styles(Frame_Tree $tree) {
// Use XPath to select nodes. This would be easier if we could attach
// Frame objects directly to DOMNodes using the setUserData() method, but
// we can't do that just yet. Instead, we set a _node attribute_ in
// Frame->set_id() and use that as a handle on the Frame object via
// Frame_Tree::$_registry.
// We create a scratch array of styles indexed by frame id. Once all
// styles have been assigned, we order the cached styles by specificity
// and create a final style object to assign to the frame.
// FIXME: this is not particularly robust...
$styles = array();
$xp = new DOMXPath($tree->get_dom());
// Apply all styles in stylesheet
foreach ($this->_styles as $selector => $style) {
$query = $this->_css_selector_to_xpath($selector);
// pre_var_dump($selector);
// pre_var_dump($query);
// echo ($style);
// Retrieve the nodes
$nodes = $xp->query($query);
foreach ($nodes as $node) {
//echo $node->nodeName . "\n";
// Retrieve the node id
if ( $node->nodeType != 1 ) // Only DOMElements get styles
continue;
$id = $node->getAttribute("frame_id");
// Assign the current style to the scratch array
$spec = $this->_specificity($selector);
$styles[$id][$spec][] = $style;
}
}
// Now create the styles and assign them to the appropriate frames. (We
// iterate over the tree using an implicit Frame_Tree iterator.)
$root_flg = false;
foreach ($tree->get_frames() as $frame) {
// pre_r($frame->get_node()->nodeName . ":");
if ( !$root_flg && $this->_page_style ) {
$style = $this->_page_style;
$root_flg = true;
} else
$style = $this->create_style();
// Find nearest DOMElement parent
$p = $frame;
while ( $p = $p->get_parent() )
if ($p->get_node()->nodeType == 1 )
break;
// Styles can only be applied directly to DOMElements; anonymous
// frames inherit from their parent
if ( $frame->get_node()->nodeType != 1 ) {
if ( $p )
$style->inherit($p->get_style());
$frame->set_style($style);
continue;
}
$id = $frame->get_id();
// Handle HTML 4.0 attributes
Attribute_Translator::translate_attributes($frame);
// Locate any additional style attributes
if ( ($str = $frame->get_node()->getAttribute("style")) !== "" ) {
$spec = $this->_specificity("!style attribute");
$styles[$id][$spec][] = $this->_parse_properties($str);
}
// Grab the applicable styles
if ( isset($styles[$id]) ) {
$applied_styles = $styles[ $frame->get_id() ];
// Sort by specificity
ksort($applied_styles);
if (DEBUGCSS) {
$debug_nodename = $frame->get_node()->nodeName;
print "\n[$debug_nodename\n";
foreach ($applied_styles as $spec => $arr) {
printf("specificity: 0x%08x\n",$spec);
foreach ($arr as $s) {
print "[\n";
$s->debug_print();
print "]\n";
}
}
}
// Merge the new styles with the inherited styles
foreach ($applied_styles as $arr) {
foreach ($arr as $s)
$style->merge($s);
}
}
// Inherit parent's styles if required
if ( $p ) {
if (DEBUGCSS) {
print "inherit:\n";
print "[\n";
$p->get_style()->debug_print();
print "]\n";
}
$style->inherit( $p->get_style() );
}
if (DEBUGCSS) {
print "DomElementStyle:\n";
print "[\n";
$style->debug_print();
print "]\n";
print "/$debug_nodename]\n";
}
/*DEBUGCSS print: see below different print debugging method
pre_r($frame->get_node()->nodeName . ":");
echo "";
echo $style;
echo "";*/
$frame->set_style($style);
}
// We're done! Clean out the registry of all styles since we
// won't be needing this later.
foreach ( array_keys($this->_styles) as $key ) {
unset($this->_styles[$key]);
}
}
/**
* parse a CSS string using a regex parser
*
* Called by {@link Stylesheet::parse_css()}
*
* @param string $str
*/
private function _parse_css($str) {
$str = trim($str);
// Destroy comments and remove HTML comments
$css = preg_replace(array(
"'/\*.*?\*/'si",
"/^$/"
), "", $str);
// FIXME: handle '{' within strings, e.g. [attr="string {}"]
// Something more legible:
$re =
"/\s* # Skip leading whitespace \n".
"( @([^\s]+)\s+([^{;]*) (?:;|({)) )? # Match @rules followed by ';' or '{' \n".
"(?(1) # Only parse sub-sections if we're in an @rule... \n".
" (?(4) # ...and if there was a leading '{' \n".
" \s*( (?:(?>[^{}]+) ({)? # Parse rulesets and individual @page rules \n".
" (?(6) (?>[^}]*) }) \s*)+? \n".
" ) \n".
" }) # Balancing '}' \n".
"| # Branch to match regular rules (not preceeded by '@')\n".
"([^{]*{[^}]*})) # Parse normal rulesets\n".
"/xs";
if ( preg_match_all($re, $css, $matches, PREG_SET_ORDER) === false )
// An error occured
throw new DOMPDF_Exception("Error parsing css file: preg_match_all() failed.");
// After matching, the array indicies are set as follows:
//
// [0] => complete text of match
// [1] => contains '@import ...;' or '@media {' if applicable
// [2] => text following @ for cases where [1] is set
// [3] => media types or full text following '@import ...;'
// [4] => '{', if present
// [5] => rulesets within media rules
// [6] => '{', within media rules
// [7] => individual rules, outside of media rules
//
//pre_r($matches);
foreach ( $matches as $match ) {
$match[2] = trim($match[2]);
if ( $match[2] !== "" ) {
// Handle @rules
switch ($match[2]) {
case "import":
$this->_parse_import($match[3]);
break;
case "media":
$acceptedmedia = self::$ACCEPTED_GENERIC_MEDIA_TYPES;
if ( defined("DOMPDF_DEFAULT_MEDIA_TYPE") ) {
$acceptedmedia[] = DOMPDF_DEFAULT_MEDIA_TYPE;
} else {
$acceptedmedia[] = self::$ACCEPTED_DEFAULT_MEDIA_TYPE;
}
if ( in_array(mb_strtolower(trim($match[3])), $acceptedmedia ) ) {
$this->_parse_sections($match[5]);
}
break;
case "page":
//This handles @page to be applied to page oriented media
//Note: This has a reduced syntax:
//@page { margin:1cm; color:blue; }
//Not a sequence of styles like a full.css, but only the properties
//of a single style, which is applied to the very first "root" frame before
//processing other styles of the frame.
//Working properties:
// margin (for margin around edge of paper)
// font-family (default font of pages)
// color (default text color of pages)
//Non working properties:
// border
// padding
// background-color
//Todo:Reason is unknown
//Other properties (like further font or border attributes) not tested.
//If a border or background color around each paper sheet is desired,
//assign it to the tag, possibly only for the css of the correct media type.
// Store the style for later...
if ( is_null($this->_page_style) )
$this->_page_style = $this->_parse_properties($match[5]);
else
$this->_page_style->merge($this->_parse_properties($match[5]));
break;
default:
// ignore everything else
break;
}
continue;
}
if ( $match[7] !== "" )
$this->_parse_sections($match[7]);
}
}
/* See also style.cls Style::_image(), refactoring?, works also for imported css files */
protected function _image($val) {
$DEBUGCSS=DEBUGCSS;
if ( mb_strpos($val, "url") === false ) {
$path = "none"; //Don't resolve no image -> otherwise would prefix path and no longer recognize as none
}
else {
$val = preg_replace("/url\(['\"]?([^'\")]+)['\"]?\)/","\\1", trim($val));
// Resolve the url now in the context of the current stylesheet
$parsed_url = explode_url($val);
if ( $parsed_url["protocol"] == "" && $this->get_protocol() == "" ) {
if ($parsed_url["path"]{0} === '/' || $parsed_url["path"]{0} === '\\' ) {
$path = $_SERVER["DOCUMENT_ROOT"].'/';
} else {
$path = $this->get_base_path();
}
$path .= $parsed_url["path"] . $parsed_url["file"];
$path = realpath($path);
// If realpath returns FALSE then specifically state that there is no background image
if (!$path) { $path = 'none'; }
} else {
$path = build_url($this->get_protocol(),
$this->get_host(),
$this->get_base_path(),
$val);
}
}
if ($DEBUGCSS) {
print "[_image\n";
print_r($parsed_url);
print $this->get_protocol()."\n".$this->get_base_path()."\n".$path."\n";
print "_image]";;
}
return $path;
}
/**
* parse @import{} sections
*
* @param string $url the url of the imported CSS file
*/
private function _parse_import($url) {
$arr = preg_split("/[\s\n,]/", $url,-1, PREG_SPLIT_NO_EMPTY);
$url = array_shift($arr);
$accept = false;
if ( count($arr) > 0 ) {
$acceptedmedia = self::$ACCEPTED_GENERIC_MEDIA_TYPES;
if ( defined("DOMPDF_DEFAULT_MEDIA_TYPE") ) {
$acceptedmedia[] = DOMPDF_DEFAULT_MEDIA_TYPE;
} else {
$acceptedmedia[] = self::$ACCEPTED_DEFAULT_MEDIA_TYPE;
}
// @import url media_type [media_type...]
foreach ( $arr as $type ) {
if ( in_array(mb_strtolower(trim($type)), $acceptedmedia) ) {
$accept = true;
break;
}
}
} else {
// unconditional import
$accept = true;
}
if ( $accept ) {
// Store our current base url properties in case the new url is elsewhere
$protocol = $this->_protocol;
$host = $this->_base_host;
$path = $this->_base_path;
// $url = str_replace(array('"',"url", "(", ")"), "", $url);
// If the protocol is php, assume that we will import using file://
// $url = build_url($protocol == "php://" ? "file://" : $protocol, $host, $path, $url);
// Above does not work for subfolders and absolute urls.
// Todo: As above, do we need to replace php or file to an empty protocol for local files?
$url = $this->_image($url);
$this->load_css_file($url);
// Restore the current base url
$this->_protocol = $protocol;
$this->_base_host = $host;
$this->_base_path = $path;
}
}
/**
* parse regular CSS blocks
*
* _parse_properties() creates a new Style object based on the provided
* CSS rules.
*
* @param string $str CSS rules
* @return Style
*/
private function _parse_properties($str) {
$properties = explode(";", $str);
if (DEBUGCSS) print '[_parse_properties';
// Create the style
$style = new Style($this);
foreach ($properties as $prop) {
//A css property can have " ! important" appended (whitespace optional)
//strip this off to decode core of the property correctly.
//Pass on in the style to allow proper handling:
//!important properties can only be overridden by other !important ones.
//$style->$prop_name = is a shortcut of $style->__set($prop_name,$value);.
//If no specific set function available, set _props["prop_name"]
//style is always copied completely, or $_props handled separately
//Therefore set a _important_props["prop_name"]=true to indicate the modifier
/* Instead of short code, prefer the typical case with fast code
$important = preg_match("/(.*?)!\s*important/",$prop,$match);
if ( $important ) {
$prop = $match[1];
}
$prop = trim($prop);
*/
if (DEBUGCSS) print '(';
$important = false;
$prop = trim($prop);
if (substr($prop,-9) === 'important') {
$prop_tmp = rtrim(substr($prop,0,-9));
if (substr($prop_tmp,-1) === '!') {
$prop = rtrim(substr($prop_tmp,0,-1));
$important = true;
}
}
if ($prop == "") {
if (DEBUGCSS) print 'empty)';
continue;
}
$i = mb_strpos($prop, ":");
if ( $i === false ) {
if (DEBUGCSS) print 'novalue'.$prop.')';
continue;
}
$prop_name = rtrim(mb_strtolower(mb_substr($prop, 0, $i)));
$value = ltrim(mb_substr($prop, $i+1));
if (DEBUGCSS) print $prop_name.':='.$value.($important?'!IMPORTANT':'').')';
//New style, anyway empty
//if ($important || !$style->important_get($prop_name) ) {
//$style->$prop_name = array($value,$important);
//assignment might be replaced by overloading through __set,
//and overloaded functions might check _important_props,
//therefore set _important_props first.
if ($important) {
$style->important_set($prop_name);
}
//For easier debugging, don't use overloading of assignments with __set
$style->$prop_name = $value;
//$style->props_set($prop_name, $value);
}
if (DEBUGCSS) print '_parse_properties]';
return $style;
}
/**
* parse selector + rulesets
*
* @param string $str CSS selectors and rulesets
*/
private function _parse_sections($str) {
// Pre-process: collapse all whitespace and strip whitespace around '>',
// '.', ':', '+', '#'
$patterns = array("/[\\s\n]+/", "/\\s+([>.:+#])\\s+/");
$replacements = array(" ", "\\1");
$str = preg_replace($patterns, $replacements, $str);
$sections = explode("}", $str);
if (DEBUGCSS) print '[_parse_sections';
foreach ($sections as $sect) {
$i = mb_strpos($sect, "{");
$selectors = explode(",", mb_substr($sect, 0, $i));
if (DEBUGCSS) print '[section';
$style = $this->_parse_properties(trim(mb_substr($sect, $i+1)));
// Assign it to the selected elements
foreach ($selectors as $selector) {
$selector = trim($selector);
if ($selector == "") {
if (DEBUGCSS) print '#empty#';
continue;
}
if (DEBUGCSS) print '#'.$selector.'#';
//if (DEBUGCSS) { if (strpos($selector,'p') !== false) print '!!!p!!!#'; }
$this->add_style($selector, $style);
}
if (DEBUGCSS) print 'section]';
}
if (DEBUGCSS) print '_parse_sections]';
}
/**
* dumps the entire stylesheet as a string
*
* Generates a string of each selector and associated style in the
* Stylesheet. Useful for debugging.
*
* @return string
*/
function __toString() {
$str = "";
foreach ($this->_styles as $selector => $style)
$str .= "$selector => " . $style->__toString() . "\n";
return $str;
}
}