org.daisy.pipeline.css.StyleAccessor Maven / Gradle / Ivy

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package org.daisy.pipeline.css;

import java.util.Optional;

import org.daisy.common.xpath.saxon.ExtensionFunctionProvider;
import org.daisy.common.xpath.saxon.ReflexiveExtensionFunctionProvider;

import org.osgi.service.component.annotations.Component;

import org.w3c.dom.Element;

public abstract class StyleAccessor {

	@Component(
		name = "StyleAccesor",
		service = { ExtensionFunctionProvider.class }
	)
	public static class Provider extends ReflexiveExtensionFunctionProvider {
		public Provider() {
			super(StyleAccessor.class);
		}
	}

	/**
	 * Get the specified
	 * value of a CSS property and element.
	 */
	public abstract Optional get(Element element, String property);

	/**
	 * Test whether an element matches a CSS selector.
	 *
	 * @throws IllegalArgumentException if the selector can not be compiled
	 */
	public abstract boolean matches(Element element, String selector);

}