org.w3c.css.properties.css3.CssWidthCSS3 Maven / Gradle / Ivy
//
// $Id: CssWidthCSS3.java,v 1.4 2010-01-05 13:49:56 ylafon Exp $
// From Philippe Le Hegaret ([email protected])
//
// (c) COPYRIGHT MIT and INRIA, 1997.
// Please first read the full copyright statement in file COPYRIGHT.html
package org.w3c.css.properties.css3;
import org.w3c.css.parser.CssStyle;
import org.w3c.css.properties.css.CssProperty;
import org.w3c.css.util.ApplContext;
import org.w3c.css.util.InvalidParamException;
import org.w3c.css.values.CssExpression;
import org.w3c.css.values.CssIdent;
import org.w3c.css.values.CssLength;
import org.w3c.css.values.CssNumber;
import org.w3c.css.values.CssPercentage;
import org.w3c.css.values.CssValue;
/**
*
* 'width'
*
*
* Value: <length> | <percentage> | auto
* Initial: auto
* Applies to: block-level and replaced elements
* Inherited: no
* Percentage values: refer to parent element's width
*
* This property can be applied to text elements, but it is most useful with
* replaced elements such as images. The width is to be enforced by scaling
* the image if necessary. When scaling, the aspect ratio of the image is preserved
* if the 'height' property is 'auto'.
*
* Example:
*
* IMG.icon { width: 100px }
*
*
* If the 'width' and 'height' of a replaced element are both 'auto', these
* properties will be set to the intrinsic dimensions of the element.
*
* Negative values are not allowed.
* @version $Revision: 1.4 $
*/
public class CssWidthCSS3 extends CssProperty {
CssValue value;
private static CssIdent auto = new CssIdent("auto");
private static CssIdent initial = new CssIdent("initial");
/**
* Create a new CssWidthCSS3
*/
public CssWidthCSS3() {
value = auto;
}
/**
* Create a new CssWidthCSS3.
*
* @param expression The expression for this property
* @exception InvalidParamException Values are incorrect
*/
public CssWidthCSS3(ApplContext ac, CssExpression expression,
boolean check) throws InvalidParamException {
CssValue val = expression.getValue();
setByUser();
if (val.equals(inherit)) {
value = inherit;
} else if (val.equals(initial)) {
value = initial;
} else if (val instanceof CssLength || val instanceof CssPercentage) {
float f = ((Float) val.get()).floatValue();
if (f < 0) {
throw new InvalidParamException("negative-value",
val.toString(), ac);
}
value = val;
} else if (val.equals(auto)) {
value = auto;
} else if (val instanceof CssNumber) {
value = ((CssNumber) val).getLength();
} else {
throw new InvalidParamException("value", expression.getValue(),
getPropertyName(), ac);
}
expression.next();
}
public CssWidthCSS3(ApplContext ac, CssExpression expression)
throws InvalidParamException {
this(ac, expression, false);
}
/**
* Returns the value of this property.
*/
public Object get() {
return value;
}
/**
* Returns the name of this property.
*/
public String getPropertyName() {
return "width";
}
/**
* Returns true if this property is "softly" inherited
* e.g. his value equals inherit
*/
public boolean isSoftlyInherited() {
return value == inherit;
}
/**
* Returns a string representation of the object.
*/
public String toString() {
return value.toString();
}
/**
* Add this property to the CssStyle.
*
* @param style The CssStyle
*/
public void addToStyle(ApplContext ac, CssStyle style) {
Css3Style style0 = (Css3Style) style;
if (style0.cssWidthCSS3 != null)
style0.addRedefinitionWarning(ac, this);
style0.cssWidthCSS3 = this;
}
/**
* Get this property in the style.
*
* @param style The style where the property is
* @param resolve if true, resolve the style to find this property
*/
public CssProperty getPropertyInStyle(CssStyle style, boolean resolve) {
if (resolve) {
return ((Css3Style) style).getWidthCSS3();
} else {
return ((Css3Style) style).cssWidthCSS3;
}
}
/**
* Compares two properties for equality.
*
* @param value The other property.
*/
public boolean equals(CssProperty property) {
return (property instanceof CssWidthCSS3 && value.equals(((CssWidthCSS3) property).value));
}
/**
* Is the value of this property is a default value.
* It is used by all macro for the function print
*/
public boolean isDefault() {
return value == auto;
}
}