Package com.itextpdf.styledxmlparser.css.util

Class CssUtils

  • public class CssUtils
extends java.lang.Object
    Utilities class for CSS operations.

    • Constructor Summary

      Constructors 
      Modifier Constructor Description
      private CssUtils()
      Creates a new CssUtils instance.

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      private static boolean addRange​(RangeBuilder builder, java.lang.String range)  
      private static boolean addRange​(RangeBuilder builder, java.lang.String left, java.lang.String right)  
      static boolean compareFloats​(double d1, double d2)
      Helper method for comparing floating point numbers
      static boolean compareFloats​(float f1, float f2)
      Helper method for comparing floating point numbers
      static double convertPtsToPx​(double pts)
      Convert given point value to a pixel value.
      static float convertPtsToPx​(float pts)
      Convert given point value to a pixel value.
      static double convertPxToPts​(double px)
      Convert given point value to a point value.
      static float convertPxToPts​(float px)
      Convert given point value to a point value.
      static java.lang.String extractAttributeValue​(java.lang.String attrStr, IElementNode element)
      Parses string and return attribute value.
      private static java.lang.String extractFallback​(java.lang.String fallbackString)  
      static java.util.List<java.util.List<java.lang.String>> extractShorthandProperties​(java.lang.String str)
      Extracts shorthand properties as list of string lists from a string, where the top level list is shorthand property and the lower level list is properties included in shorthand property.
      private static java.lang.String extractTypeOfAttribute​(java.lang.String typeString)  
      static java.lang.String extractUnquotedString​(java.lang.String str)
      Unquotes the passed string, e.g.
      static java.lang.String extractUrl​(java.lang.String url)
      Parses url("file.jpg") to file.jpg.
      static int findNextUnescapedChar​(java.lang.String source, char ch, int startIndex)
      Find the next unescaped character.
      private static java.lang.String getAttributeValue​(java.lang.String attributeName, java.lang.String typeOfAttribute, java.lang.String fallback, IElementNode elementNode)  
      private static boolean isAttributeNameValid​(java.lang.String attributeName)  
      static boolean isStyleSheetLink​(IElementNode headChildElement)
      Checks if an IElementNode represents a style sheet link.
      static java.lang.String normalizeCssProperty​(java.lang.String str)
      Normalizes a CSS property.
      static BlendMode parseBlendMode​(java.lang.String cssValue)
      Parses the given css blend mode value.
      static Range parseUnicodeRange​(java.lang.String unicodeRange)
      Parses the unicode range.
      static java.lang.String removeDoubleSpacesAndTrim​(java.lang.String str)
      Removes double spaces and trims a string.
      static java.util.List<java.lang.String> splitString​(java.lang.String value, char splitChar, EscapeGroup... escapeCharacters)
      Splits the provided String by split character with respect of escape characters.
      static java.util.List<java.lang.String> splitStringWithComma​(java.lang.String value)
      Splits the provided String by comma with respect of brackets.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Field Detail

      • logger

        private static final org.slf4j.Logger logger

      • QUANTITY_OF_PARAMS_WITH_FALLBACK_OR_TYPE

        private static final int QUANTITY_OF_PARAMS_WITH_FALLBACK_OR_TYPE
        See Also:
        Constant Field Values

    • Constructor Detail

      • CssUtils

        private CssUtils()
        Creates a new CssUtils instance.

    • Method Detail

      • splitStringWithComma

        public static java.util.List<java.lang.String> splitStringWithComma​(java.lang.String value)
        Splits the provided String by comma with respect of brackets.
        Parameters:
        value - to split
        Returns:
        the List of split result

      • splitString

        public static java.util.List<java.lang.String> splitString​(java.lang.String value,
                                                           char splitChar,
                                                           EscapeGroup... escapeCharacters)
        Splits the provided String by split character with respect of escape characters.
        Parameters:
        value - value to split
        splitChar - character to split the String
        escapeCharacters - escape characters
        Returns:
        the List of split result

      • parseBlendMode

        public static BlendMode parseBlendMode​(java.lang.String cssValue)
        Parses the given css blend mode value. If the argument is null or an unknown blend mode, then the default css BlendMode.NORMAL value would be returned.
        Parameters:
        cssValue - the value to parse
        Returns:
        the BlendMode instance representing the parsed value

      • extractShorthandProperties

        public static java.util.List<java.util.List<java.lang.String>> extractShorthandProperties​(java.lang.String str)
        Extracts shorthand properties as list of string lists from a string, where the top level list is shorthand property and the lower level list is properties included in shorthand property.
        Parameters:
        str - the source string with shorthand properties
        Returns:
        the list of string lists

      • normalizeCssProperty

        public static java.lang.String normalizeCssProperty​(java.lang.String str)
        Normalizes a CSS property.
        Parameters:
        str - the property
        Returns:
        the normalized property

      • removeDoubleSpacesAndTrim

        public static java.lang.String removeDoubleSpacesAndTrim​(java.lang.String str)
        Removes double spaces and trims a string.
        Parameters:
        str - the string
        Returns:
        the string without the unnecessary spaces

      • extractUrl

        public static java.lang.String extractUrl​(java.lang.String url)
        Parses url("file.jpg") to file.jpg.
        Parameters:
        url - the url attribute to parse
        Returns:
        the parsed url. Or original url if not wrappend in url()

      • extractUnquotedString

        public static java.lang.String extractUnquotedString​(java.lang.String str)
        Unquotes the passed string, e.g. parse "text" to text.
        Parameters:
        str - the quotes string
        Returns:
        the unquoted string, or original str if not wrapped in quotes

      • extractAttributeValue

        public static java.lang.String extractAttributeValue​(java.lang.String attrStr,
                                                     IElementNode element)
        Parses string and return attribute value.
        Parameters:
        attrStr - the string contains attr() to extract attribute value
        element - the parentNode from which we extract information
        Returns:
        the value of attribute

      • findNextUnescapedChar

        public static int findNextUnescapedChar​(java.lang.String source,
                                        char ch,
                                        int startIndex)
        Find the next unescaped character.
        Parameters:
        source - a source
        ch - the character to look for
        startIndex - where to start looking
        Returns:
        the position of the next unescaped character

      • compareFloats

        public static boolean compareFloats​(double d1,
                                    double d2)
        Helper method for comparing floating point numbers
        Parameters:
        d1 - first float to compare
        d2 - second float to compare
        Returns:
        True if both floats are equal within a Epsilon defined in this class, false otherwise

      • compareFloats

        public static boolean compareFloats​(float f1,
                                    float f2)
        Helper method for comparing floating point numbers
        Parameters:
        f1 - first float to compare
        f2 - second float to compare
        Returns:
        True if both floats are equal within a Epsilon defined in this class, false otherwise

      • parseUnicodeRange

        public static Range parseUnicodeRange​(java.lang.String unicodeRange)
        Parses the unicode range.
        Parameters:
        unicodeRange - the string which stores the unicode range
        Returns:
        the unicode range as a Range object

      • convertPtsToPx

        public static float convertPtsToPx​(float pts)
        Convert given point value to a pixel value. 1 px is 0.75 pts.
        Parameters:
        pts - float value to be converted to pixels
        Returns:
        float converted value pts/0.75f

      • convertPtsToPx

        public static double convertPtsToPx​(double pts)
        Convert given point value to a pixel value. 1 px is 0.75 pts.
        Parameters:
        pts - double value to be converted to pixels
        Returns:
        double converted value pts/0.75

      • convertPxToPts

        public static float convertPxToPts​(float px)
        Convert given point value to a point value. 1 px is 0.75 pts.
        Parameters:
        px - float value to be converted to pixels
        Returns:
        float converted value px*0.75

      • convertPxToPts

        public static double convertPxToPts​(double px)
        Convert given point value to a point value. 1 px is 0.75 pts.
        Parameters:
        px - double value to be converted to pixels
        Returns:
        double converted value px*0.75

      • isStyleSheetLink

        public static boolean isStyleSheetLink​(IElementNode headChildElement)
        Checks if an IElementNode represents a style sheet link.
        Parameters:
        headChildElement - the head child element
        Returns:
        true, if the element node represents a style sheet link

      • addRange

        private static boolean addRange​(RangeBuilder builder,
                                java.lang.String range)

      • addRange

        private static boolean addRange​(RangeBuilder builder,
                                java.lang.String left,
                                java.lang.String right)

      • isAttributeNameValid

        private static boolean isAttributeNameValid​(java.lang.String attributeName)

      • extractFallback

        private static java.lang.String extractFallback​(java.lang.String fallbackString)

      • extractTypeOfAttribute

        private static java.lang.String extractTypeOfAttribute​(java.lang.String typeString)

      • getAttributeValue

        private static java.lang.String getAttributeValue​(java.lang.String attributeName,
                                                  java.lang.String typeOfAttribute,
                                                  java.lang.String fallback,
                                                  IElementNode elementNode)