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/*******************************************************************************
* Copyright (c) 2004, 2013 John Krasnay and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* John Krasnay - initial API and implementation
* Florian Thienel - a NULL object
*******************************************************************************/
package org.eclipse.vex.core.internal.css;
import org.eclipse.vex.core.provisional.dom.INode;
/**
* Determines whitespace policy for document elements. For example, a CSS stylesheet implements a whitespace policy via
* its display and white-space properties.
*/
public interface IWhitespacePolicy {
/**
* A NULL object of this type. No blocks and no pre elements.
*/
IWhitespacePolicy NULL = new IWhitespacePolicy() {
public boolean isBlock(final INode node) {
return false;
}
public boolean isPre(final INode node) {
return false;
}
};
/**
* This policy preserves whitespace but knows no blocks.
*/
IWhitespacePolicy PRESERVE_WHITESPACE = new IWhitespacePolicy() {
public boolean isBlock(final INode node) {
return false;
}
public boolean isPre(final INode node) {
return true;
}
};
/**
* Returns true if the given element is normally block-formatted.
*
* @param element
* Element to test.
*/
boolean isBlock(INode node);
/**
* Returns true if the given element is pre-formatted, that is, all of its contained whitespace should be preserved.
*
* @param element
* Element to test.
*/
boolean isPre(INode node);
}
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