CssUtils (pdfHTML 2.0.2 API)

java.lang.Object
- com.itextpdf.html2pdf.css.util.CssUtils

```
public class CssUtils
extends Object
```
Utilities class for CSS operations.

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`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`	`isBase64Data(String data)` Checks if a data is base 64 encoded.
`static boolean`	`isColorProperty(String value)` Checks if a value is a color property.
`static boolean`	`isMetricValue(String value)` Checks whether a string contains an allowed metric unit in HTML/CSS; px, in, cm, mm, pc or pt.
`static boolean`	`isNumericValue(String value)` Checks whether a string matches a numeric value (e.g.
`static boolean`	`isRelativeValue(String value)` Checks whether a string contains an allowed value relative to previously set value.
`static boolean`	`isRemValue(String value)` Checks whether a string contains an allowed value relative to previously set root value.
`static String`	`normalizeCssProperty(String str)` Normalizes a CSS property.
`static float`	`parseAbsoluteLength(String length)` Parses the absolute length.
`static float`	`parseAbsoluteLength(String length, String defaultMetric)` Parses a length with an allowed metric unit (px, pt, in, cm, mm, pc, q) or numeric value (e.g.
`static int[]`	`parseAspectRatio(String str)` Parses an aspect ratio into an array with two integers.
`static Float`	`parseFloat(String str)` Parses a float without throwing an exception if something goes wrong.
`static Integer`	`parseInteger(String str)` Parses an integer without throwing an exception if something goes wrong.
`static com.itextpdf.layout.property.UnitValue`	`parseLengthValueToPt(String value, float emValue, float remValue)` Convenience method for parsing a value to pt.
`static float`	`parseRelativeValue(String relativeValue, float baseValue)` Parses an relative value based on the base value that was given, in the metric unit of the base value. (e.g.
`static float`	`parseResolution(String resolutionStr)` Parses the resolution.
`static float[]`	`parseRgbaColor(String colorValue)` Parses the RGBA color.
`static com.itextpdf.layout.property.UnitValue[]`	`parseSpecificCornerBorderRadius(String specificBorderRadius, float emValue, float remValue)` Parses the border radius of specific corner.
`static String`	`removeDoubleSpacesAndTrim(String str)` Removes double spaces and trims a string.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - 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
  - parseInteger
```
public static Integer parseInteger(String str)
```
    Parses an integer without throwing an exception if something goes wrong.
    
    Parameters:
    
    str - a string that might be an integer value
    
    Returns:
    
    the integer value, or null if something went wrong
  - parseFloat
```
public static Float parseFloat(String str)
```
    Parses a float without throwing an exception if something goes wrong.
    
    Parameters:
    
    str - a string that might be a float value
    
    Returns:
    
    the float value, or null if something went wrong
  - parseAspectRatio
```
public static int[] parseAspectRatio(String str)
```
    Parses an aspect ratio into an array with two integers.
    
    Parameters:
    
    str - a string that might contain two integer values
    
    Returns:
    
    the aspect ratio as an array of two integer values
  - parseAbsoluteLength
```
public static float parseAbsoluteLength(String length,
                                        String defaultMetric)
```
    Parses a length with an allowed metric unit (px, pt, in, cm, mm, pc, q) or numeric value (e.g. 123, 1.23, .123) to pt.
    A numeric value (without px, pt, etc in the given length string) is considered to be in the default metric that was given.
    
    Parameters:
    
    length - the string containing the length.
    
    defaultMetric - the string containing the metric if it is possible that the length string does not contain one. If null the length is considered to be in px as is default in HTML/CSS.
    
    Returns:
    
    parsed value
  - parseAbsoluteLength
```
public static float parseAbsoluteLength(String length)
```
    Parses the absolute length.
    
    Parameters:
    
    length - the length as a string
    
    Returns:
    
    the length as a float
  - parseRelativeValue
```
public static float parseRelativeValue(String relativeValue,
                                       float baseValue)
```
    Parses an relative value based on the base value that was given, in the metric unit of the base value.
    (e.g. margin=10% should be based on the page width, so if an A4 is used, the margin = 0.10*595.0 = 59.5f)
    
    Parameters:
    
    relativeValue - in %, em or ex.
    
    baseValue - the value the returned float is based on.
    
    Returns:
    
    the parsed float in the metric unit of the base value.
  - parseLengthValueToPt
```
public static com.itextpdf.layout.property.UnitValue parseLengthValueToPt(String value,
                                                                          float emValue,
                                                                          float remValue)
```
    Convenience method for parsing a value to pt. Possible values are:
    - a numeric value in pixels (e.g. 123, 1.23, .123),
    - a value with a metric unit (px, in, cm, mm, pc or pt) attached to it,
    - or a value with a relative value (%, em, ex).
    Parameters:
    
    value - the value
    
    emValue - the em value
    
    remValue - the root em value
    
    Returns:
    
    the unit value
  - parseResolution
```
public static float parseResolution(String resolutionStr)
```
    Parses the resolution.
    
    Parameters:
    
    resolutionStr - the resolution as a string
    
    Returns:
    
    a value in dpi (currently)
  - isColorProperty
```
public static boolean isColorProperty(String value)
```
    Checks if a value is a color property.
    
    Parameters:
    
    value - the value
    
    Returns:
    
    true, if the value contains a color property
  - parseRgbaColor
```
public static float[] parseRgbaColor(String colorValue)
```
    Parses the RGBA color.
    
    Parameters:
    
    colorValue - the color value
    
    Returns:
    
    an RGBA value expressed as an array with four float values
  - parseSpecificCornerBorderRadius
```
public static com.itextpdf.layout.property.UnitValue[] parseSpecificCornerBorderRadius(String specificBorderRadius,
                                                                                       float emValue,
                                                                                       float remValue)
```
    Parses the border radius of specific corner.
    
    Parameters:
    
    specificBorderRadius - string that defines the border radius of specific corner.
    
    emValue - the em value
    
    remValue - the root em value
    
    Returns:
    
    an array of UnitValues that define horizontal and vertical border radius values
  - isMetricValue
```
public static boolean isMetricValue(String value)
```
    Checks whether a string contains an allowed metric unit in HTML/CSS; px, in, cm, mm, pc or pt.
    
    Parameters:
    
    value - the string that needs to be checked.
    
    Returns:
    
    boolean true if value contains an allowed metric value.
  - isRelativeValue
```
public static boolean isRelativeValue(String value)
```
    Checks whether a string contains an allowed value relative to previously set value.
    
    Parameters:
    
    value - the string that needs to be checked.
    
    Returns:
    
    boolean true if value contains an allowed metric value.
  - isRemValue
```
public static boolean isRemValue(String value)
```
    Checks whether a string contains an allowed value relative to previously set root value.
    
    Parameters:
    
    value - the string that needs to be checked.
    
    Returns:
    
    boolean true if value contains an allowed metric value.
  - isNumericValue
```
public static boolean isNumericValue(String value)
```
    Checks whether a string matches a numeric value (e.g. 123, 1.23, .123). All these metric values are allowed in HTML/CSS.
    
    Parameters:
    
    value - the string that needs to be checked.
    
    Returns:
    
    boolean true if value contains an allowed metric value.
  - 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()
  - isBase64Data
```
public static boolean isBase64Data(String data)
```
    Checks if a data is base 64 encoded.
    
    Parameters:
    
    data - the data
    
    Returns:
    
    true, if the data is base 64 encoded
  - 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

Class CssUtils

Method Summary

Methods inherited from class java.lang.Object

Method Detail

normalizeCssProperty

removeDoubleSpacesAndTrim

parseInteger

parseFloat

parseAspectRatio

parseAbsoluteLength

parseAbsoluteLength

parseRelativeValue

parseLengthValueToPt

parseResolution

isColorProperty

parseRgbaColor

parseSpecificCornerBorderRadius

isMetricValue

isRelativeValue

isRemValue

isNumericValue

extractUrl

isBase64Data

findNextUnescapedChar