CssUtils (iText 5.5.13.4 API)

java.lang.Object
- com.itextpdf.tool.xml.css.CssUtils

```
public class CssUtils
extends Object
```
Author:

redlab_b

Field Summary

Fields
Modifier and Type	Field and Description
`static int`	`DEFAULT_FONT_SIZE_PT` Default font size if none is set.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`float`	`calculateMarginTop(float value, MarginMemory configuration)` Calculates the margin top or spacingBefore based on the given value and the last margin bottom.
`float`	`calculateMarginTop(String value, float largestFont, MarginMemory configuration)` Calculates the margin top or spacingBefore based on the given value and the last margin bottom.
`Float`	`checkMetricStyle(Map<String,String> css, String style)` Use only if value of style is a metric value (`isMetricValue(String)`) or a numeric value in pixels (`isNumericValue(String)`). Checks if the style is present in the css of the tag, then parses it to pt.
`float`	`checkMetricStyle(Tag t, String style)` Use only if value of style is a metric value (`isMetricValue(String)`) or a numeric value in pixels (`isNumericValue(String)`). Checks if the style is present in the css of the tag, then parses it to pt.
`int`	`determinePositionBetweenValueAndUnit(String string)` Method used in preparation of splitting a string containing a numeric value with a metric unit (e.g.
`String`	`extractUrl(String url)` Parses `url("file.jpg")` to `file.jpg`.
`static CssUtils`	`getInstance()`
`float`	`getLeftAndRightMargin(Tag t, float pageWidth)` Returns the sum of the left and right margin of a tag.
`boolean`	`isMetricValue(String value)` Checks whether a string contains an allowed metric unit in HTML/CSS; px, in, cm, mm, pc or pt.
`boolean`	`isNumericValue(String value)` Checks whether a string matches a numeric value (e.g.
`boolean`	`isRelativeValue(String value)` Checks whether a string contains an allowed value relative to previously set value.
`Map<String,String>`	`parseBorder(String border)`
`Map<String,String>`	`parseBorder(String border, String borderKey)`
`Map<String,String>`	`parseBoxValues(String box, String pre, String post)` Returns the top, bottom, left, right version for the given box.
`Map<String,String>`	`parseBoxValues(String box, String pre, String post, String preKey)`
`float`	`parsePxInCmMmPcToPt(String length)` Parses a length with an allowed metric unit (px, pt, in, cm, mm, pc, em or ex) or numeric value (e.g.
`float`	`parsePxInCmMmPcToPt(String length, String defaultMetric)` Parses a length with an allowed metric unit (px, pt, in, cm, mm, pc, em or ex) or numeric value (e.g.
`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.
`float`	`parseValueToPt(String value, float baseValue)` Convenience method for parsing a value to pt if a value can contain: a numeric value in pixels (e.g.
`Map<String,String>`	`processBackground(String background)` Preparation before implementing the background style in iText.
`Map<String,String>`	`processFont(String font)` Preparation before implementing the font style in iText.
`Map<String,String>`	`processListStyle(String listStyle)` Preparation before implementing the list style in iText.
`String[]`	`splitComplexCssStyle(String s)`
`String`	`stripDoubleSpacesAndTrim(String str)` Trims and Strips double spaces from the given string.
`String`	`stripDoubleSpacesTrimAndToLowerCase(String str)`
`String`	`trimAndRemoveQuoutes(String s)` Trims a string and removes surrounding " or '.
`float`	`validateTextHeight(Map<String,String> css, float textHeight)` Validates a given textHeight based on the content of a tag against the css styles "min-height" and "max-height" of the tag if present.

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

- Field Detail
  - DEFAULT_FONT_SIZE_PT
```
public static final int DEFAULT_FONT_SIZE_PT
```
    Default font size if none is set.
    
    See Also:
    
    Constant Field Values
- Method Detail
  - getInstance
```
public static CssUtils getInstance()
```
    Returns:
    
    Singleton instance of CssUtils.
  - parseBoxValues
```
public Map<String,String> parseBoxValues(String box,
                                         String pre,
                                         String post)
```
    Returns the top, bottom, left, right version for the given box. the keys will be the pre value concatenated with either top, bottom, right or left and the post value. Note: Does not work when double spaces are in the boxes value. (Tip: Use stripDoubleSpacesAndTrim(String))
    
    Parameters:
    
    box - the value to parse
    
    pre - the pre key part
    
    post - the post key part
    
    Returns:
    
    a map with the parsed properties
  - parseBoxValues
```
public Map<String,String> parseBoxValues(String box,
                                         String pre,
                                         String post,
                                         String preKey)
```
  - parseBorder
```
public Map<String,String> parseBorder(String border)
```
    Parameters:
    
    border - the border property
    
    Returns:
    
    a map of the border property parsed to each property (width, style, color).
  - parseBorder
```
public Map<String,String> parseBorder(String border,
                                      String borderKey)
```
  - stripDoubleSpacesAndTrim
```
public String stripDoubleSpacesAndTrim(String str)
```
    Trims and Strips double spaces from the given string.
    
    Parameters:
    
    str - the string to strip
    
    Returns:
    
    the string without double spaces
  - stripDoubleSpacesTrimAndToLowerCase
```
public String stripDoubleSpacesTrimAndToLowerCase(String str)
```
  - processBackground
```
public Map<String,String> processBackground(String background)
```
    Preparation before implementing the background style in iText. Splits the given background style and its attributes into background-color, background-image, background-repeat, background-attachment, background-position and css styles.
    
    Parameters:
    
    background - the string containing the font style value.
    
    Returns:
    
    a map with the values of font parsed into each css property.
  - processListStyle
```
public Map<String,String> processListStyle(String listStyle)
```
    Preparation before implementing the list style in iText. Splits the given list style and its attributes into list-style-type, list-style-position and list-style-image.
    
    Parameters:
    
    listStyle - the string containing the list style value.
    
    Returns:
    
    a map with the values of the parsed list style into each css property.
  - processFont
```
public Map<String,String> processFont(String font)
```
    Preparation before implementing the font style in iText. Splits the given font style and its attributes into font-size, line-height, font-weight, font-style, font-variant and font-family css styles.
    
    Parameters:
    
    font - the string containing the font style value.
    
    Returns:
    
    a map with the values of the parsed font into each css property.
  - checkMetricStyle
```
public float checkMetricStyle(Tag t,
                              String style)
```
    Use only if value of style is a metric value (isMetricValue(String)) or a numeric value in pixels (isNumericValue(String)).
    Checks if the style is present in the css of the tag, then parses it to pt. and returns the parsed value.
    
    Parameters:
    
    t - the tag which needs to be checked.
    
    style - the style which needs to be checked.
    
    Returns:
    
    float the parsed value of the style or 0f if the value was invalid.
  - checkMetricStyle
```
public Float checkMetricStyle(Map<String,String> css,
                              String style)
```
    Use only if value of style is a metric value (isMetricValue(String)) or a numeric value in pixels (isNumericValue(String)).
    Checks if the style is present in the css of the tag, then parses it to pt. and returns the parsed value.
    
    Parameters:
    
    css - the map of css styles which needs to be checked.
    
    style - the style which needs to be checked.
    
    Returns:
    
    float the parsed value of the style or 0f if the value was invalid.
  - isMetricValue
```
public 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 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.
  - isNumericValue
```
public 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.
  - parseValueToPt
```
public float parseValueToPt(String value,
                            float baseValue)
```
    Convenience method for parsing a value to pt if a value can contain:
    - 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).
    Note: baseValue must be in pt.
    Parameters:
    
    value - the string containing the value to be parsed.
    
    baseValue - float needed for the calculation of the relative value.
    
    Returns:
    
    parsedValue float containing the parsed value in pt.
  - parseRelativeValue
```
public 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.
  - parsePxInCmMmPcToPt
```
public float parsePxInCmMmPcToPt(String length,
                                 String defaultMetric)
```
    Parses a length with an allowed metric unit (px, pt, in, cm, mm, pc, em or ex) 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
  - parsePxInCmMmPcToPt
```
public float parsePxInCmMmPcToPt(String length)
```
    Parses a length with an allowed metric unit (px, pt, in, cm, mm, pc, em or ex) or numeric value (e.g. 123, 1.23, .123) to pt.
    A numeric value is considered to be in px as is default in HTML/CSS.
    
    Parameters:
    
    length - the string containing the length.
    
    Returns:
    
    float the parsed length in pt.
  - determinePositionBetweenValueAndUnit
```
public int determinePositionBetweenValueAndUnit(String string)
```
    Method used in preparation of splitting a string containing a numeric value with a metric unit (e.g. 18px, 9pt, 6cm, etc).
    
    Determines the position between digits and affiliated characters ('+','-','0-9' and '.') and all other characters.
    e.g. string "16px" will return 2, string "0.5em" will return 3 and string '-8.5mm' will return 4.
    
    Parameters:
    
    string - containing a numeric value with a metric unit
    
    Returns:
    
    int position between the numeric value and unit or 0 if string is null or string started with a non-numeric value.
  - getLeftAndRightMargin
```
public float getLeftAndRightMargin(Tag t,
                                   float pageWidth)
```
    Returns the sum of the left and right margin of a tag.
    
    Parameters:
    
    t - the tag of which the total horizontal margin is needed.
    
    pageWidth - the page width
    
    Returns:
    
    float the total horizontal margin.
  - extractUrl
```
public 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()
  - validateTextHeight
```
public float validateTextHeight(Map<String,String> css,
                                float textHeight)
```
    Validates a given textHeight based on the content of a tag against the css styles "min-height" and "max-height" of the tag if present.
    
    Parameters:
    
    css - the styles of a tag
    
    textHeight - the current textHeight based on the content of a tag
    
    Returns:
    
    the final text height of an element.
  - calculateMarginTop
```
public float calculateMarginTop(String value,
                                float largestFont,
                                MarginMemory configuration)
```
    Calculates the margin top or spacingBefore based on the given value and the last margin bottom.
    
    In HTML the margin-bottom of a tag overlaps with the margin-top of a following tag. This method simulates this behavior by subtracting the margin-top value of the given tag from the margin-bottom of the previous tag. The remaining value is returned or if the margin-bottom value is the largest, 0 is returned
    
    Parameters:
    
    value - the margin-top value of the given tag.
    
    largestFont - used if a relative value was given to calculate margin.
    
    configuration - XmlWorkerConfig containing the last margin bottom.
    
    Returns:
    
    an offset
  - calculateMarginTop
```
public float calculateMarginTop(float value,
                                MarginMemory configuration)
```
    Calculates the margin top or spacingBefore based on the given value and the last margin bottom.
    
    In HTML the margin-bottom of a tag overlaps with the margin-top of a following tag. This method simulates this behavior by subtracting the margin-top value of the given tag from the margin-bottom of the previous tag. The remaining value is returned or if the margin-bottom value is the largest, 0 is returned
    
    Parameters:
    
    value - float containing the margin-top value.
    
    configuration - XmlWorkerConfig containing the last margin bottom.
    
    Returns:
    
    an offset
  - trimAndRemoveQuoutes
```
public String trimAndRemoveQuoutes(String s)
```
    Trims a string and removes surrounding " or '.
    
    Parameters:
    
    s - the string
    
    Returns:
    
    trimmed and unquoted string
  - splitComplexCssStyle
```
public String[] splitComplexCssStyle(String s)
```

Class CssUtils

Field Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

DEFAULT_FONT_SIZE_PT

Method Detail

getInstance

parseBoxValues

parseBoxValues

parseBorder

parseBorder

stripDoubleSpacesAndTrim

stripDoubleSpacesTrimAndToLowerCase

processBackground

processListStyle

processFont

checkMetricStyle

checkMetricStyle

isMetricValue

isRelativeValue

isNumericValue

parseValueToPt

parseRelativeValue

parsePxInCmMmPcToPt

parsePxInCmMmPcToPt

determinePositionBetweenValueAndUnit

getLeftAndRightMargin

extractUrl

validateTextHeight

calculateMarginTop

calculateMarginTop

trimAndRemoveQuoutes

splitComplexCssStyle