org.w3c.css.properties.atsc.CssBackgroundAttachmentATSC Maven / Gradle / Ivy
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//
// $Id: CssBackgroundAttachmentATSC.java,v 1.4 2010-01-05 13:49:34 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.atsc;
import org.w3c.css.parser.CssStyle;
import org.w3c.css.properties.css.CssProperty;
import org.w3c.css.properties.css.CssBackgroundConstants;
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.CssValue;
/**
*
* 'background-attachment'
*
*
* Value: scroll | fixed
* Initial: scroll
* Applies to: all elements
* Inherited: no
* Percentage values: N/A
*
* If a background image is specified, the value of 'background-attachment'
* determines if it is fixed with regard to the canvas or if it scrolls along
* with the content.
*
* BODY {
* background: red url(pendant.gif);
* background-repeat: repeat-y;
* background-attachment: fixed;
* }
*
* @version $Revision: 1.4 $
*/
public class CssBackgroundAttachmentATSC extends CssProperty
implements CssBackgroundConstants {
int attachment;
private static int[] hash_values;
/**
* Create a new CssBackgroundAttachmentATSC
*/
public CssBackgroundAttachmentATSC() {
// nothing to do
}
/**
* Creates a new CssBackgroundAttachmentATSC
*
* @param expression The expression for this property
* @exception InvalidParamException Values are incorrect
*/
public CssBackgroundAttachmentATSC(ApplContext ac, CssExpression expression,
boolean check) throws InvalidParamException {
if(check && expression.getCount() > 1) {
throw new InvalidParamException("unrecognize", ac);
}
setByUser();
CssValue val = expression.getValue();
if (val instanceof CssIdent) {
int hash = val.hashCode();
for (int i =0; i < ATTACHMENT.length; i++)
if (hash_values[i] == hash) {
attachment = i;
expression.next();
return;
}
}
throw new InvalidParamException("value", expression.getValue(),
getPropertyName(), ac);
}
public CssBackgroundAttachmentATSC(ApplContext ac, CssExpression expression)
throws InvalidParamException {
this(ac, expression, false);
}
/**
* Returns the value of this property
*/
public Object get() {
return ATTACHMENT[attachment];
}
/**
* Returns true if this property is "softly" inherited
* e.g. his value equals inherit
*/
public boolean isSoftlyInherited() {
return attachment == 2;
}
/**
* Returns a string representation of the object.
*/
public String toString() {
return ATTACHMENT[attachment];
}
/**
* Returns the name of this property
*/
public String getPropertyName() {
return "background-attachment";
}
/**
* Add this property to the CssStyle.
*
* @param style The CssStyle
*/
public void addToStyle(ApplContext ac, CssStyle style) {
CssBackgroundATSC cssBackground = ((ATSCStyle) style).cssBackgroundATSC;
if (cssBackground.attachment != null)
style.addRedefinitionWarning(ac, this);
cssBackground.attachment = 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 ((ATSCStyle) style).getBackgroundAttachmentATSC();
} else {
return ((ATSCStyle) style).cssBackgroundATSC.attachment;
}
}
/**
* Compares two properties for equality.
*
* @param value The other property.
*/
public boolean equals(CssProperty property) {
return (property instanceof CssBackgroundAttachmentATSC &&
attachment == ((CssBackgroundAttachmentATSC) property).attachment);
}
/**
* Is the value of this property is a default value.
* It is used by all macro for the function print
*/
public boolean isDefault() {
return attachment == 0;
}
static {
hash_values = new int[ATTACHMENT.length];
for (int i = 0; i < ATTACHMENT.length; i++)
hash_values[i] = ATTACHMENT[i].hashCode();
}
}