--- /dev/null
+/* AbstractNumberNode.java --
+ Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING. If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library. Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module. An independent module is a module which is not derived from
+or based on this library. If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so. If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.transform;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import javax.xml.namespace.QName;
+import javax.xml.transform.TransformerException;
+import org.w3c.dom.Document;
+import org.w3c.dom.DocumentFragment;
+import org.w3c.dom.Node;
+import org.w3c.dom.Text;
+import gnu.xml.xpath.Expr;
+
+/**
+ * A template node representing the XSL <code>number</code> instruction.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+abstract class AbstractNumberNode
+ extends TemplateNode
+{
+
+ static final int ALPHABETIC = 0;
+ static final int TRADITIONAL = 1;
+
+ final TemplateNode format;
+ final String lang;
+ final int letterValue;
+ final String groupingSeparator;
+ final int groupingSize;
+
+ AbstractNumberNode(TemplateNode format, String lang,
+ int letterValue, String groupingSeparator,
+ int groupingSize)
+ {
+ this.format = format;
+ this.lang = lang;
+ this.letterValue = letterValue;
+ this.groupingSeparator = groupingSeparator;
+ this.groupingSize = groupingSize;
+ }
+
+ void doApply(Stylesheet stylesheet, QName mode,
+ Node context, int pos, int len,
+ Node parent, Node nextSibling)
+ throws TransformerException
+ {
+ Document doc = (parent instanceof Document) ? (Document) parent :
+ parent.getOwnerDocument();
+ DocumentFragment fragment = doc.createDocumentFragment();
+ format.apply(stylesheet, mode, context, pos, len, fragment, null);
+ String f = Expr._string(context, Collections.singleton(fragment));
+ String value = format(f, compute(stylesheet, context, pos, len));
+ Text text = doc.createTextNode(value);
+ if (nextSibling != null)
+ {
+ parent.insertBefore(text, nextSibling);
+ }
+ else
+ {
+ parent.appendChild(text);
+ }
+ // xsl:number doesn't process children
+ if (next != null)
+ {
+ next.apply(stylesheet, mode,
+ context, pos, len,
+ parent, nextSibling);
+ }
+ }
+
+ String format(String format, int[] number)
+ {
+ if (number.length == 0)
+ {
+ return "";
+ }
+ int start = 0, end = 0, len = format.length(); // region of format
+ // Tokenize
+ List tokens = new ArrayList((number.length * 2) + 1);
+ List types = new ArrayList(tokens.size());
+ while (end < len)
+ {
+ while (end < len && !isAlphanumeric(format.charAt(end)))
+ {
+ end++;
+ }
+ if (end > start)
+ {
+ tokens.add(format.substring(start, end));
+ types.add(Boolean.FALSE);
+ }
+ start = end;
+ while (end < len && isAlphanumeric(format.charAt(end)))
+ {
+ end++;
+ }
+ if (end > start)
+ {
+ tokens.add(format.substring(start, end));
+ types.add(Boolean.TRUE);
+ }
+ start = end;
+ }
+ // Process tokens
+ StringBuffer buf = new StringBuffer();
+ len = tokens.size();
+ int pos = 0;
+ for (int i = 0; i < len; i++)
+ {
+ String token = (i < 0) ? "." : (String) tokens.get(i);
+ boolean alpha = (i < 0) ? true :
+ ((Boolean) types.get(i)).booleanValue();
+ if (!alpha)
+ {
+ buf.append(token);
+ }
+ else
+ {
+ if (pos < number.length)
+ {
+ format(buf, number[pos++], token);
+ if (((i + 1 == len) || (i + 2 == len)) &&
+ (pos < number.length))
+ {
+ // More numbers than tokens, reuse last token
+ i -= 2;
+ }
+ }
+ if (pos == number.length && i < (len - 2))
+ {
+ // No more numbers. Skip to the end...
+ i = len - 2;
+ if (((Boolean) types.get(i + 1)).booleanValue())
+ {
+ // number formatting token, ignore
+ i++;
+ }
+ }
+ }
+ }
+ //System.err.println("format: '"+format+"' "+asList(number)+" = '"+buf.toString()+"'");
+ return buf.toString();
+ }
+
+ /*List asList(int[] number)
+ {
+ List l = new ArrayList();
+ for (int i = 0; i < number.length; i++)
+ l.add(new Integer(number[i]));
+ return l;
+ }*/
+
+ void format(StringBuffer buf, int number, String formatToken)
+ {
+ int len = formatToken.length();
+ char c = formatToken.charAt(len - 1);
+ if (Character.digit(c, 10) == 1)
+ {
+ // Check preceding characters
+ for (int i = len - 2; i >= 0; i--)
+ {
+ if (formatToken.charAt(i) != (c - 1))
+ {
+ format(buf, number, "1");
+ return;
+ }
+ }
+ // Decimal representation
+ String val = Integer.toString(number);
+ for (int d = len - val.length(); d > 0; d--)
+ {
+ buf.append('0');
+ }
+ buf.append(val);
+ }
+ else if ("A".equals(formatToken))
+ {
+ buf.append(alphabetic('@', number));
+ }
+ else if ("a".equals(formatToken))
+ {
+ buf.append(alphabetic('`', number));
+ }
+ else if ("i".equals(formatToken))
+ {
+ buf.append(roman(false, number));
+ }
+ else if ("I".equals(formatToken))
+ {
+ buf.append(roman(true, number));
+ }
+ else
+ {
+ // Unknown numbering sequence
+ format(buf, number, "1");
+ }
+ }
+
+ static final boolean isAlphanumeric(char c)
+ {
+ switch (Character.getType(c))
+ {
+ case Character.DECIMAL_DIGIT_NUMBER: // Nd
+ case Character.LETTER_NUMBER: // Nl
+ case Character.OTHER_NUMBER: // No
+ case Character.UPPERCASE_LETTER: // Lu
+ case Character.LOWERCASE_LETTER: // Ll
+ case Character.TITLECASE_LETTER: // Lt
+ case Character.MODIFIER_LETTER: // Lm
+ case Character.OTHER_LETTER: // Lo
+ return true;
+ default:
+ return false;
+ }
+ }
+
+ static final String alphabetic(char offset, int number)
+ {
+ StringBuffer buf = new StringBuffer();
+ while (number > 0)
+ {
+ int r = number % 26;
+ number = number / 26;
+ buf.insert(0, (char) (offset + r));
+ }
+ return buf.toString();
+ }
+
+ static final int[] roman_numbers = {1, 5, 10, 50, 100, 500, 1000};
+ static final char[] roman_chars = {'i', 'v', 'x', 'l', 'c', 'd', 'm'};
+
+ static final String roman(boolean upper, int number)
+ {
+ StringBuffer buf = new StringBuffer();
+ for (int pos = roman_numbers.length - 1; pos >= 0; pos -= 2)
+ {
+ int f = number / roman_numbers[pos];
+ if (f != 0)
+ {
+ number = number % (f * roman_numbers[pos]);
+ }
+ if (f > 4 && f < 9)
+ {
+ buf.append(roman_chars[pos + 1]);
+ f -= 5;
+ }
+ if (f == 4)
+ {
+ buf.append(roman_chars[pos]);
+ buf.append(roman_chars[pos + 1]);
+ }
+ else if (f == 9)
+ {
+ buf.append(roman_chars[pos]);
+ buf.append(roman_chars[pos + 2]);
+ }
+ else
+ {
+ for (; f > 0; f--)
+ {
+ buf.append(roman_chars[pos]);
+ }
+ }
+ }
+ return upper ? buf.toString().toUpperCase() : buf.toString();
+ }
+
+ abstract int[] compute(Stylesheet stylesheet, Node context, int pos, int len)
+ throws TransformerException;
+
+ public boolean references(QName var)
+ {
+ if (format.references(var))
+ {
+ return true;
+ }
+ return super.references(var);
+ }
+
+ public String toString()
+ {
+ StringBuffer buf = new StringBuffer(getClass().getName());
+ buf.append('[');
+ buf.append("format=");
+ buf.append(format);
+ buf.append(']');
+ return buf.toString();
+ }
+
+}
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