Package com.google.common.css.compiler.gssfunctions

Class GssFunctions

java.lang.Object

com.google.common.css.compiler.gssfunctions.GssFunctions

public class GssFunctions
extends Object

Container for common GSS functions.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	GssFunctions.AddHsbToCssColor	Implementation of the addHsbToCssColor GSS function.
static class	GssFunctions.AddToNumericValue	The "add()" function adds a list of numeric values.
static class	GssFunctions.AdjustBrightness	Implementation of the adjustBrightness GSS function.
static class	GssFunctions.BaseBlendColors	Base implementation of the color blending GSS function.
static class	GssFunctions.BaseHslColorManipulation	Abstract base class providing HSL color space manipulation functions.
static class	GssFunctions.BlendColorsHsb	Implementation of the blendColorsHsb GSS function.
static class	GssFunctions.BlendColorsRgb	Implementation of the blendColorsRgb GSS function.
static class	GssFunctions.Concat	Implementation of the concat(…) GssFunction.
static class	GssFunctions.Darken	Decrease the lightness of a color.
static class	GssFunctions.DesaturateColor	Decrease the saturation of the specified color.
static class	GssFunctions.Div	A GssFunction that returns the quotient of its arguments.
static class	GssFunctions.Greyscale	Convert the color to a grayscale (desaturation with amount of 100).
static class	GssFunctions.Lighten	Increase the lightness of a color.
static class	GssFunctions.MakeContrastingColor	The "makeContrastingColor" function generates a contrasting color with the same hue as the input color.
static class	GssFunctions.MakeMutedColor	Implementation of the makeMutedColor GSS function.
static class	GssFunctions.MakeTranslucent	Takes an input color and sets its alpha component without affecting the RGB components.
static class	GssFunctions.MaxValue	A GssFunction that returns the max value from its list of arguments.
static class	GssFunctions.MinValue	A GssFunction that returns the min value from its list of arguments.
static class	GssFunctions.Mult	A GssFunction that returns the product of its arguments.
static class	GssFunctions.SaturateColor	Increase the saturation of the specified color.
static class	GssFunctions.SelectFrom	Allows the equivalent of the ternary operator in GSS, using three @def statements as inputs.
static class	GssFunctions.Spin	Increase or decrease the hue of a color.
static class	GssFunctions.SubtractFromNumericValue	The "sub()" function subtracts a list of numeric values.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	MUST_BE_NUMERIC
static final String	TRANSPARENT

Constructor Summary

Constructors

Constructor	Description
GssFunctions()

Method Summary

Modifier and Type	Method	Description
static void	assertArgumentLooksLikeAColor(int argOrdinal, CssValueNode argValue, ErrorManager errorManager)	Verify a function argument looks like a color node.
static String	createUrl(String url)	Helper method for implementors of GssFunction to allow the creation of a url string in the GSS.
static CssFunctionNode	createUrlNode(String imageUrl, SourceCodeLocation location)	Helper method for implementors of GssFunction to allow the creation of a url entry node in a GSS file.
static GssFunctionException	error(CssValueNode node, String errorMessage, ErrorManager errorManager)
static Map<String,GssFunction>	getFunctionMap()
static boolean	parseBoolean(String numericPart)	Helper method to convert a numeric value of "0" or "1" into a boolean.

Methods inherited from class java.lang.Object

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

Field Details

TRANSPARENT

public static final String TRANSPARENT

See Also:

• Constant Field Values

MUST_BE_NUMERIC

public static final String MUST_BE_NUMERIC

See Also:

• Constant Field Values

Constructor Details

GssFunctions

public GssFunctions()

Method Details

getFunctionMap

public static Map<String,GssFunction> getFunctionMap()

Returns:

a map from each GSS function name to the function

parseBoolean

public static boolean parseBoolean(String numericPart)

Helper method to convert a numeric value of "0" or "1" into a boolean.

Parameters:

numericPart - The string containing the value

Returns:

The corresponding boolean value

createUrlNode

public static CssFunctionNode createUrlNode(String imageUrl,
 SourceCodeLocation location)

Helper method for implementors of GssFunction to allow the creation of a url entry node in a GSS file.

Parameters:

imageUrl - The url of the image to add.

location - The location in the GSS file to place the node.

Returns:

The node containing the url entry.

assertArgumentLooksLikeAColor

public static void assertArgumentLooksLikeAColor(int argOrdinal,
 CssValueNode argValue,
 ErrorManager errorManager)
                                          throws GssFunctionException

Verify a function argument looks like a color node.

Throws:

GssFunctionException

error

public static GssFunctionException error(CssValueNode node,
 String errorMessage,
 ErrorManager errorManager)

createUrl

public static String createUrl(String url)

Helper method for implementors of GssFunction to allow the creation of a url string in the GSS.

Parameters:

url - The url of the image to add.

Returns:

The proper GSS url string.