net.sf.saxon.style.StylesheetStripper Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of saxon9 Show documentation
Provides a basic XSLT 2.0 and XQuery 1.0 processor (W3C Recommendations, January 2007). Command line interfaces and implementations of several Java APIs (DOM, XPath, s9api) are also included.
The newest version!
package net.sf.saxon.style;
import net.sf.saxon.event.Stripper;
import net.sf.saxon.om.NamePool;
import net.sf.saxon.om.NodeInfo;
import net.sf.saxon.om.StandardNames;
import net.sf.saxon.trans.XPathException;

import java.util.Arrays;

/**
  * The StylesheetStripper refines the Stripper class to do stripping of
  * whitespace nodes on a stylesheet. This is handled specially (a) because
  * it is done at compile time, so there is no Controller available, and (b)
  * because the rules are very simple
  * @author Michael H. Kay
  */

public class StylesheetStripper extends Stripper
{


    //    Any child of one of the following elements is removed from the tree,
    //    regardless of any xml:space attributes. Note that this array must be in numeric
    //    order for binary chop to work correctly.

    private static final int[] specials = {
        StandardNames.XSL_ANALYZE_STRING,
        StandardNames.XSL_APPLY_IMPORTS,
        StandardNames.XSL_APPLY_TEMPLATES,
        StandardNames.XSL_ATTRIBUTE_SET,
        StandardNames.XSL_CALL_TEMPLATE,
        StandardNames.XSL_CHARACTER_MAP,
        StandardNames.XSL_CHOOSE,
        StandardNames.XSL_NEXT_MATCH,
        StandardNames.XSL_STYLESHEET,
        StandardNames.XSL_TRANSFORM
    };

    public Stripper getAnother() {
        StylesheetStripper s = new StylesheetStripper();
        return s;
    }

	/**
	* Set the rules appropriate for whitespace-stripping in a stylesheet
	*/

	public void setStylesheetRules(NamePool namePool) {
//	    xsl_text = namePool.getFingerprint(NamespaceConstant.XSLT, "text");
//	    specials[0] = namePool.getFingerprint(NamespaceConstant.XSLT, "analyze-string");
//	    specials[1] = namePool.getFingerprint(NamespaceConstant.XSLT, "apply-imports");
//	    specials[2] = namePool.getFingerprint(NamespaceConstant.XSLT, "apply-templates");
//	    specials[3] = namePool.getFingerprint(NamespaceConstant.XSLT, "attribute-set");
//	    specials[4] = namePool.getFingerprint(NamespaceConstant.XSLT, "call-template");
//	    specials[5] = namePool.getFingerprint(NamespaceConstant.XSLT, "character-map");
//	    specials[6] = namePool.getFingerprint(NamespaceConstant.XSLT, "choose");
//	    specials[7] = namePool.getFingerprint(NamespaceConstant.XSLT, "next-match");
//	    specials[8] = namePool.getFingerprint(NamespaceConstant.XSLT, "stylesheet");
//	    specials[9] = namePool.getFingerprint(NamespaceConstant.XSLT, "transform");
    }

    /**
    * Decide whether an element is in the set of white-space preserving element types
    * @param nameCode identifies the element being tested
    */

    public byte isSpacePreserving(int nameCode) {
        int fp = nameCode & 0xfffff;
        if (fp == StandardNames.XSL_TEXT) {
            return ALWAYS_PRESERVE;
        };

        if (Arrays.binarySearch(specials, fp) >= 0) {
            return ALWAYS_STRIP;
        }
//        for (int i = 0; i < specials.length; i++) {
//            if (fp == specials[i]) {
//                return ALWAYS_STRIP;
//            }
//        }
        return STRIP_DEFAULT;
    }

    /**
    * Decide whether an element is in the set of white-space preserving element types.
     * This version of the method is useful in cases where getting the namecode of the
     * element is potentially expensive, e.g. with DOM nodes.
    * @param element Identifies the element whose whitespace is possibly to
     * be preserved
    * @return true if the element is in the set of white-space preserving element types
    */

    public byte isSpacePreserving(NodeInfo element) throws XPathException {
        return isSpacePreserving(element.getNameCode());
    }

}   // end of class StylesheetStripper

//
// The contents of this file are subject to the Mozilla Public License Version 1.0 (the "License");
// you may not use this file except in compliance with the License. You may obtain a copy of the
// License at http://www.mozilla.org/MPL/
//
// Software distributed under the License is distributed on an "AS IS" basis,
// WITHOUT WARRANTY OF ANY KIND, either express or implied.
// See the License for the specific language governing rights and limitations under the License.
//
// The Original Code is: all this file.
//
// The Initial Developer of the Original Code is Michael H. Kay.
//
// Portions created by (your name) are Copyright (C) (your legal entity). All Rights Reserved.
//
// Contributor(s): none.
//