com.itextpdf.styledxmlparser.css.util

Class CssUtils

java.lang.Object

com.itextpdf.styledxmlparser.css.util.CssUtils

public class CssUtils
extends Object

Utilities class for CSS operations.

Method Summary

Modifier and Type	Method and Description
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 String	extractAttributeValue(String attrStr, IElementNode element) Parses string and return attribute value.
static List<List<String>>	extractShorthandProperties(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.
static String	extractUrl(String url) Parses url("file.jpg") to file.jpg.
static int	findNextUnescapedChar(String source, char ch, int startIndex) Find the next unescaped character.
static boolean	isStyleSheetLink(IElementNode headChildElement) Checks if an IElementNode represents a style sheet link.
static String	normalizeCssProperty(String str) Normalizes a CSS property.
static BlendMode	parseBlendMode(String cssValue) Parses the given css blend mode value.
static Range	parseUnicodeRange(String unicodeRange) Parses the unicode range.
static String	removeDoubleSpacesAndTrim(String str) Removes double spaces and trims a string.
static List<String>	splitString(String value, char splitChar, EscapeGroup... escapeCharacters) Splits the provided String by split character with respect of escape characters.
static List<String>	splitStringWithComma(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

Method Detail

splitStringWithComma

public static List<String> splitStringWithComma(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 List<String> splitString(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(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 List<List<String>> extractShorthandProperties(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 String normalizeCssProperty(String str)

Normalizes a CSS property.

Parameters:

str - the property

Returns:

the normalized property

removeDoubleSpacesAndTrim

public static String removeDoubleSpacesAndTrim(String str)

Removes double spaces and trims a string.

Parameters:

str - the string

Returns:

the string without the unnecessary spaces

extractUrl

public static String extractUrl(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()

extractAttributeValue

public static String extractAttributeValue(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(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(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