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1 files changed, 1455 insertions, 0 deletions

diff --git a/libjava/classpath/javax/swing/text/html/StyleSheet.java b/libjava/classpath/javax/swing/text/html/StyleSheet.java
new file mode 100644
index 000000000..5cf015bc5
--- /dev/null
+++ b/libjava/classpath/javax/swing/text/html/StyleSheet.java
@@ -0,0 +1,1455 @@
+/* StyleSheet.java --
+   Copyright (C) 2005 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 javax.swing.text.html;
+
+import gnu.javax.swing.text.html.css.BorderWidth;
+import gnu.javax.swing.text.html.css.CSSColor;
+import gnu.javax.swing.text.html.css.CSSParser;
+import gnu.javax.swing.text.html.css.CSSParserCallback;
+import gnu.javax.swing.text.html.css.FontSize;
+import gnu.javax.swing.text.html.css.FontStyle;
+import gnu.javax.swing.text.html.css.FontWeight;
+import gnu.javax.swing.text.html.css.Length;
+import gnu.javax.swing.text.html.css.Selector;
+
+import java.awt.Color;
+import java.awt.Font;
+import java.awt.Graphics;
+import java.awt.Rectangle;
+import java.awt.Shape;
+import java.awt.font.FontRenderContext;
+import java.awt.geom.Rectangle2D;
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.Reader;
+import java.io.Serializable;
+import java.io.StringReader;
+import java.net.URL;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Enumeration;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+
+import javax.swing.border.Border;
+import javax.swing.event.ChangeListener;
+import javax.swing.text.AttributeSet;
+import javax.swing.text.Element;
+import javax.swing.text.MutableAttributeSet;
+import javax.swing.text.SimpleAttributeSet;
+import javax.swing.text.Style;
+import javax.swing.text.StyleConstants;
+import javax.swing.text.StyleContext;
+import javax.swing.text.View;
+
+
+/**
+ * This class adds support for defining the visual characteristics of HTML views
+ * being rendered. This enables views to be customized by a look-and-feel, mulitple
+ * views over the same model can be rendered differently. Each EditorPane has its
+ * own StyleSheet, but by default one sheet will be shared by all of the HTMLEditorKit
+ * instances. An HTMLDocument can also have a StyleSheet, which holds specific CSS
+ * specs.
+ *
+ *  In order for Views to store less state and therefore be more lightweight,
+ *  the StyleSheet can act as a factory for painters that handle some of the
+ *  rendering tasks. Since the StyleSheet may be used by views over multiple
+ *  documents the HTML attributes don't effect the selector being used.
+ *
+ *  The rules are stored as named styles, and other information is stored to
+ *  translate the context of an element to a rule.
+ *
+ * @author Lillian Angel (langel@redhat.com)
+ */
+public class StyleSheet extends StyleContext
+{
+
+  /**
+   * Parses CSS stylesheets using the parser in gnu/javax/swing/html/css.
+   *
+   * This is package private to avoid accessor methods.
+   */
+  class CSSStyleSheetParserCallback
+    implements CSSParserCallback
+  {
+    /**
+     * The current styles.
+     */
+    private CSSStyle[] styles;
+
+    /**
+     * The precedence of the stylesheet to be parsed.
+     */
+    private int precedence;
+
+    /**
+     * Creates a new CSS parser. This parser parses a CSS stylesheet with
+     * the specified precedence.
+     *
+     * @param prec the precedence, according to the constants defined in
+     *        CSSStyle
+     */
+    CSSStyleSheetParserCallback(int prec)
+    {
+      precedence = prec;
+    }
+
+    /**
+     * Called at the beginning of a statement.
+     *
+     * @param sel the selector
+     */
+    public void startStatement(Selector[] sel)
+    {
+      styles = new CSSStyle[sel.length];
+      for (int i = 0; i < sel.length; i++)
+        styles[i] = new CSSStyle(precedence, sel[i]);
+    }
+
+    /**
+     * Called at the end of a statement.
+     */
+    public void endStatement()
+    {
+      for (int i = 0; i < styles.length; i++)
+        css.add(styles[i]);
+      styles = null;
+    }
+
+    /**
+     * Called when a declaration is parsed.
+     *
+     * @param property the property
+     * @param value the value
+     */
+    public void declaration(String property, String value)
+    {
+      CSS.Attribute cssAtt = CSS.getAttribute(property);
+      Object val = CSS.getValue(cssAtt, value);
+      for (int i = 0; i < styles.length; i++)
+        {
+          CSSStyle style = styles[i];
+          CSS.addInternal(style, cssAtt, value);
+          if (cssAtt != null)
+            style.addAttribute(cssAtt, val);
+        }
+    }
+
+  }
+
+  /**
+   * Represents a style that is defined by a CSS rule.
+   */
+  private class CSSStyle
+    extends SimpleAttributeSet
+    implements Style, Comparable<CSSStyle>
+  {
+
+    static final int PREC_UA = 0;
+    static final int PREC_NORM = 100000;
+    static final int PREC_AUTHOR_NORMAL = 200000;
+    static final int PREC_AUTHOR_IMPORTANT = 300000;
+    static final int PREC_USER_IMPORTANT = 400000;
+
+    /**
+     * The priority of this style when matching CSS selectors.
+     */
+    private int precedence;
+
+    /**
+     * The selector for this rule.
+     *
+     * This is package private to avoid accessor methods.
+     */
+    Selector selector;
+
+    CSSStyle(int prec, Selector sel)
+    {
+      precedence = prec;
+      selector = sel;
+    }
+
+    public String getName()
+    {
+      // TODO: Implement this for correctness.
+      return null;
+    }
+
+    public void addChangeListener(ChangeListener listener)
+    {
+      // TODO: Implement this for correctness.
+    }
+
+    public void removeChangeListener(ChangeListener listener)
+    {
+      // TODO: Implement this for correctness.
+    }
+
+    /**
+     * Sorts the rule according to the style's precedence and the
+     * selectors specificity.
+     */
+    public int compareTo(CSSStyle other)
+    {
+      return other.precedence + other.selector.getSpecificity()
+             - precedence - selector.getSpecificity();
+    }
+
+  }
+
+  /** The base URL */
+  URL base;
+
+  /** Base font size (int) */
+  int baseFontSize;
+
+  /**
+   * The linked style sheets stored.
+   */
+  private ArrayList<StyleSheet> linked;
+
+  /**
+   * Maps element names (selectors) to AttributSet (the corresponding style
+   * information).
+   */
+  ArrayList<CSSStyle> css = new ArrayList<CSSStyle>();
+
+  /**
+   * Maps selectors to their resolved styles.
+   */
+  private HashMap<String,Style> resolvedStyles;
+
+  /**
+   * Constructs a StyleSheet.
+   */
+  public StyleSheet()
+  {
+    super();
+    baseFontSize = 4; // Default font size from CSS
+    resolvedStyles = new HashMap<String,Style>();
+  }
+
+  /**
+   * Gets the style used to render the given tag. The element represents the tag
+   * and can be used to determine the nesting, where the attributes will differ
+   * if there is nesting inside of elements.
+   *
+   * @param t - the tag to translate to visual attributes
+   * @param e - the element representing the tag
+   * @return the set of CSS attributes to use to render the tag.
+   */
+  public Style getRule(HTML.Tag t, Element e)
+  {
+    // Create list of the element and all of its parents, starting
+    // with the bottommost element.
+    ArrayList<Element> path = new ArrayList<Element>();
+    Element el;
+    AttributeSet atts;
+    for (el = e; el != null; el = el.getParentElement())
+      path.add(el);
+
+    // Create fully qualified selector.
+    StringBuilder selector = new StringBuilder();
+    int count = path.size();
+    // We append the actual element after this loop.
+    for (int i = count - 1; i > 0; i--)
+      {
+        el = path.get(i);
+        atts = el.getAttributes();
+        Object name = atts.getAttribute(StyleConstants.NameAttribute);
+        selector.append(name.toString());
+        if (atts.isDefined(HTML.Attribute.ID))
+          {
+            selector.append('#');
+            selector.append(atts.getAttribute(HTML.Attribute.ID));
+          }
+        if (atts.isDefined(HTML.Attribute.CLASS))
+          {
+            selector.append('.');
+            selector.append(atts.getAttribute(HTML.Attribute.CLASS));
+          }
+        if (atts.isDefined(HTML.Attribute.DYNAMIC_CLASS))
+          {
+            selector.append(':');
+            selector.append(atts.getAttribute(HTML.Attribute.DYNAMIC_CLASS));
+          }
+        if (atts.isDefined(HTML.Attribute.PSEUDO_CLASS))
+          {
+            selector.append(':');
+            selector.append(atts.getAttribute(HTML.Attribute.PSEUDO_CLASS));
+          }
+        selector.append(' ');
+      }
+    selector.append(t.toString());
+    el = path.get(0);
+    atts = el.getAttributes();
+    // For leaf elements, we have to fetch the tag specific attributes.
+    if (el.isLeaf())
+      {
+        Object o = atts.getAttribute(t);
+        if (o instanceof AttributeSet)
+          atts = (AttributeSet) o;
+        else
+          atts = null;
+      }
+    if (atts != null)
+      {
+        if (atts.isDefined(HTML.Attribute.ID))
+          {
+            selector.append('#');
+            selector.append(atts.getAttribute(HTML.Attribute.ID));
+          }
+        if (atts.isDefined(HTML.Attribute.CLASS))
+          {
+            selector.append('.');
+            selector.append(atts.getAttribute(HTML.Attribute.CLASS));
+          }
+        if (atts.isDefined(HTML.Attribute.DYNAMIC_CLASS))
+          {
+            selector.append(':');
+            selector.append(atts.getAttribute(HTML.Attribute.DYNAMIC_CLASS));
+          }
+        if (atts.isDefined(HTML.Attribute.PSEUDO_CLASS))
+          {
+            selector.append(':');
+            selector.append(atts.getAttribute(HTML.Attribute.PSEUDO_CLASS));
+          }
+      }
+    return getResolvedStyle(selector.toString(), path, t);
+  }
+
+  /**
+   * Fetches a resolved style. If there is no resolved style for the
+   * specified selector, the resolve the style using
+   * {@link #resolveStyle(String, List, HTML.Tag)}.
+   *
+   * @param selector the selector for which to resolve the style
+   * @param path the Element path, used in the resolving algorithm
+   * @param tag the tag for which to resolve
+   *
+   * @return the resolved style
+   */
+  private Style getResolvedStyle(String selector, List<Element> path, HTML.Tag tag)
+  {
+    Style style = resolvedStyles.get(selector);
+    if (style == null)
+      style = resolveStyle(selector, path, tag);
+    return style;
+  }
+
+  /**
+   * Resolves a style. This creates arrays that hold the tag names,
+   * class and id attributes and delegates the work to
+   * {@link #resolveStyle(String, String[], List<Map<String,String>>)}.
+   *
+   * @param selector the selector
+   * @param path the Element path
+   * @param tag the tag
+   *
+   * @return the resolved style
+   */
+  private Style resolveStyle(String selector, List<Element> path, HTML.Tag tag)
+  {
+    int count = path.size();
+    String[] tags = new String[count];
+    List<Map<String,String>> attributes =
+      new ArrayList<Map<String,String>>(count);
+    for (int i = 0; i < count; i++)
+      {
+        Element el = path.get(i);
+        AttributeSet atts = el.getAttributes();
+        if (i == 0 && el.isLeaf())
+          {
+            Object o = atts.getAttribute(tag);
+            if (o instanceof AttributeSet)
+              atts = (AttributeSet) o;
+            else
+              atts = null;
+          }
+        if (atts != null)
+          {
+            HTML.Tag t =
+              (HTML.Tag) atts.getAttribute(StyleConstants.NameAttribute);
+            if (t != null)
+              tags[i] = t.toString();
+            else
+              tags[i] = null;
+            attributes.set(i, attributeSetToMap(atts));
+          }
+        else
+          {
+            tags[i] = null;
+          }
+      }
+    tags[0] = tag.toString();
+    return resolveStyle(selector, tags, attributes);
+  }
+
+  /**
+   * Performs style resolving.
+   *
+   * @param selector the selector
+   * @param tags the tags
+   * @param attributes the attributes of the tags
+   *
+   * @return the resolved style
+   */
+  private Style resolveStyle(String selector, String[] tags,
+                             List<Map<String,String>> attributes)
+  {
+    // FIXME: This style resolver is not correct. But it works good enough for
+    // the default.css.
+    ArrayList<CSSStyle> styles = new ArrayList<CSSStyle>();
+    for (CSSStyle style : css)
+      {
+        if (style.selector.matches(tags, attributes))
+          styles.add(style);
+      }
+
+    // Add styles from linked stylesheets.
+    if (linked != null)
+      {
+        for (int i = linked.size() - 1; i >= 0; i--)
+          {
+            StyleSheet ss = linked.get(i);
+            for (int j = ss.css.size() - 1; j >= 0; j--)
+              {
+                CSSStyle style = ss.css.get(j);
+                if (style.selector.matches(tags, attributes))
+                  styles.add(style);
+              }
+          }
+      }
+
+    // Sort selectors.
+    Collections.sort(styles);
+    Style[] styleArray = styles.toArray(new Style[styles.size()]);
+    Style resolved = new MultiStyle(selector, styleArray);
+    resolvedStyles.put(selector, resolved);
+    return resolved;
+  }
+
+  /**
+   * Gets the rule that best matches the selector. selector is a space
+   * separated String of element names. The attributes of the returned
+   * Style will change as rules are added and removed.
+   *
+   * @param selector - the element names separated by spaces
+   * @return the set of CSS attributes to use to render
+   */
+  public Style getRule(String selector)
+  {
+    CSSStyle best = null;
+    for (Iterator<CSSStyle> i = css.iterator(); i.hasNext();)
+      {
+        CSSStyle style = i.next();
+        if (style.compareTo(best) < 0)
+          best = style;
+      }
+    return best;
+  }
+
+  /**
+   * Adds a set of rules to the sheet. The rules are expected to be in valid
+   * CSS format. This is called as a result of parsing a <style> tag
+   *
+   * @param rule - the rule to add to the sheet
+   */
+  public void addRule(String rule)
+  {
+    CSSStyleSheetParserCallback cb =
+      new CSSStyleSheetParserCallback(CSSStyle.PREC_AUTHOR_NORMAL);
+    // FIXME: Handle ref.
+    StringReader in = new StringReader(rule);
+    CSSParser parser = new CSSParser(in, cb);
+    try
+      {
+        parser.parse();
+      }
+    catch (IOException ex)
+      {
+        // Shouldn't happen. And if, then don't let it bork the outside code.
+      }
+    // Clean up resolved styles cache so that the new styles are recognized
+    // on next stylesheet request.
+    resolvedStyles.clear();
+  }
+
+  /**
+   * Translates a CSS declaration into an AttributeSet. This is called
+   * as a result of encountering an HTML style attribute.
+   *
+   * @param decl - the declaration to get
+   * @return the AttributeSet representing the declaration
+   */
+  public AttributeSet getDeclaration(String decl)
+  {
+    if (decl == null)
+      return SimpleAttributeSet.EMPTY;
+    // FIXME: Not implemented.
+    return null;
+  }
+
+  /**
+   * Loads a set of rules that have been specified in terms of CSS grammar.
+   * If there are any conflicts with existing rules, the new rule is added.
+   *
+   * @param in - the stream to read the CSS grammar from.
+   * @param ref - the reference URL. It is the location of the stream, it may
+   * be null. All relative URLs specified in the stream will be based upon this
+   * parameter.
+   * @throws IOException - For any IO error while reading
+   */
+  public void loadRules(Reader in, URL ref)
+    throws IOException
+  {
+    CSSStyleSheetParserCallback cb =
+      new CSSStyleSheetParserCallback(CSSStyle.PREC_UA);
+    // FIXME: Handle ref.
+    CSSParser parser = new CSSParser(in, cb);
+    parser.parse();
+  }
+
+  /**
+   * Gets a set of attributes to use in the view. This is a set of
+   * attributes that can be used for View.getAttributes
+   *
+   * @param v - the view to get the set for
+   * @return the AttributeSet to use in the view.
+   */
+  public AttributeSet getViewAttributes(View v)
+  {
+    return new ViewAttributeSet(v, this);
+  }
+
+  /**
+   * Removes a style previously added.
+   *
+   * @param nm - the name of the style to remove
+   */
+  public void removeStyle(String nm)
+  {
+    // FIXME: Not implemented.
+    super.removeStyle(nm);
+  }
+
+  /**
+   * Adds the rules from ss to those of the receiver. ss's rules will
+   * override the old rules. An added StyleSheet will never override the rules
+   * of the receiving style sheet.
+   *
+   * @param ss - the new StyleSheet.
+   */
+  public void addStyleSheet(StyleSheet ss)
+  {
+    if (linked == null)
+      linked = new ArrayList<StyleSheet>();
+    linked.add(ss);
+  }
+
+  /**
+   * Removes ss from those of the receiver
+   *
+   * @param ss - the StyleSheet to remove.
+   */
+  public void removeStyleSheet(StyleSheet ss)
+  {
+    if (linked != null)
+      {
+        linked.remove(ss);
+      }
+  }
+
+  /**
+   * Returns an array of the linked StyleSheets. May return null.
+   *
+   * @return - An array of the linked StyleSheets.
+   */
+  public StyleSheet[] getStyleSheets()
+  {
+    StyleSheet[] linkedSS;
+    if (linked != null)
+      {
+        linkedSS = new StyleSheet[linked.size()];
+        linkedSS = linked.toArray(linkedSS);
+      }
+    else
+      {
+        linkedSS = null;
+      }
+    return linkedSS;
+  }
+
+  /**
+   * Imports a style sheet from the url. The rules are directly added to the
+   * receiver. This is usually called when a <link> tag is resolved in an
+   * HTML document.
+   *
+   * @param url the URL to import the StyleSheet from
+   */
+  public void importStyleSheet(URL url)
+  {
+    try
+      {
+        InputStream in = url.openStream();
+        Reader r = new BufferedReader(new InputStreamReader(in));
+        CSSStyleSheetParserCallback cb =
+          new CSSStyleSheetParserCallback(CSSStyle.PREC_AUTHOR_NORMAL);
+        CSSParser parser = new CSSParser(r, cb);
+        parser.parse();
+      }
+    catch (IOException ex)
+      {
+        // We can't do anything about it I guess.
+      }
+  }
+
+  /**
+   * Sets the base url. All import statements that are relative, will be
+   * relative to base.
+   *
+   * @param base -
+   *          the base URL.
+   */
+  public void setBase(URL base)
+  {
+    this.base = base;
+  }
+
+  /**
+   * Gets the base url.
+   *
+   * @return - the base
+   */
+  public URL getBase()
+  {
+    return base;
+  }
+
+  /**
+   * Adds a CSS attribute to the given set.
+   *
+   * @param attr - the attribute set
+   * @param key - the attribute to add
+   * @param value - the value of the key
+   */
+  public void addCSSAttribute(MutableAttributeSet attr, CSS.Attribute key,
+                              String value)
+  {
+    Object val = CSS.getValue(key, value);
+    CSS.addInternal(attr, key, value);
+    attr.addAttribute(key, val);
+  }
+
+  /**
+   * Adds a CSS attribute to the given set.
+   * This method parses the value argument from HTML based on key.
+   * Returns true if it finds a valid value for the given key,
+   * and false otherwise.
+   *
+   * @param attr - the attribute set
+   * @param key - the attribute to add
+   * @param value - the value of the key
+   * @return true if a valid value was found.
+   */
+  public boolean addCSSAttributeFromHTML(MutableAttributeSet attr, CSS.Attribute key,
+                                         String value)
+  {
+    // FIXME: Need to parse value from HTML based on key.
+    attr.addAttribute(key, value);
+    return attr.containsAttribute(key, value);
+  }
+
+  /**
+   * Converts a set of HTML attributes to an equivalent set of CSS attributes.
+   *
+   * @param htmlAttrSet - the set containing the HTML attributes.
+   * @return the set of CSS attributes
+   */
+  public AttributeSet translateHTMLToCSS(AttributeSet htmlAttrSet)
+  {
+    AttributeSet cssAttr = htmlAttrSet.copyAttributes();
+
+    // The HTML align attribute maps directly to the CSS text-align attribute.
+    Object o = htmlAttrSet.getAttribute(HTML.Attribute.ALIGN);
+    if (o != null)
+      cssAttr = addAttribute(cssAttr, CSS.Attribute.TEXT_ALIGN, o);
+
+    // The HTML width attribute maps directly to CSS width.
+    o = htmlAttrSet.getAttribute(HTML.Attribute.WIDTH);
+    if (o != null)
+      cssAttr = addAttribute(cssAttr, CSS.Attribute.WIDTH,
+                             new Length(o.toString()));
+
+    // The HTML height attribute maps directly to CSS height.
+    o = htmlAttrSet.getAttribute(HTML.Attribute.HEIGHT);
+    if (o != null)
+      cssAttr = addAttribute(cssAttr, CSS.Attribute.HEIGHT,
+                             new Length(o.toString()));
+
+    o = htmlAttrSet.getAttribute(HTML.Attribute.NOWRAP);
+    if (o != null)
+      cssAttr = addAttribute(cssAttr, CSS.Attribute.WHITE_SPACE, "nowrap");
+
+    // Map cellspacing attr of tables to CSS border-spacing.
+    o = htmlAttrSet.getAttribute(HTML.Attribute.CELLSPACING);
+    if (o != null)
+      cssAttr = addAttribute(cssAttr, CSS.Attribute.BORDER_SPACING,
+                             new Length(o.toString()));
+
+    // For table cells and headers, fetch the cellpadding value from the
+    // parent table and set it as CSS padding attribute.
+    HTML.Tag tag = (HTML.Tag)
+                   htmlAttrSet.getAttribute(StyleConstants.NameAttribute);
+    if ((tag == HTML.Tag.TD || tag == HTML.Tag.TH)
+        && htmlAttrSet instanceof Element)
+      {
+        Element el = (Element) htmlAttrSet;
+        AttributeSet tableAttrs = el.getParentElement().getParentElement()
+                                  .getAttributes();
+        o = tableAttrs.getAttribute(HTML.Attribute.CELLPADDING);
+        if (o != null)
+          {
+            Length l = new Length(o.toString());
+            cssAttr = addAttribute(cssAttr, CSS.Attribute.PADDING_BOTTOM, l);
+            cssAttr = addAttribute(cssAttr, CSS.Attribute.PADDING_LEFT, l);
+            cssAttr = addAttribute(cssAttr, CSS.Attribute.PADDING_RIGHT, l);
+            cssAttr = addAttribute(cssAttr, CSS.Attribute.PADDING_TOP, l);
+          }
+        o = tableAttrs.getAttribute(HTML.Attribute.BORDER);
+        cssAttr = translateBorder(cssAttr, o);
+      }
+
+    // Translate border attribute.
+    o = cssAttr.getAttribute(HTML.Attribute.BORDER);
+    cssAttr = translateBorder(cssAttr, o);
+
+    // TODO: Add more mappings.
+    return cssAttr;
+  }
+
+  /**
+   * Translates a HTML border attribute to a corresponding set of CSS
+   * attributes.
+   *
+   * @param cssAttr the original set of CSS attributes to add to
+   * @param o the value of the border attribute
+   *
+   * @return the new set of CSS attributes
+   */
+  private AttributeSet translateBorder(AttributeSet cssAttr, Object o)
+  {
+    if (o != null)
+      {
+        BorderWidth l = new BorderWidth(o.toString());
+        if (l.getValue() > 0)
+          {
+            cssAttr = addAttribute(cssAttr, CSS.Attribute.BORDER_WIDTH, l);
+            cssAttr = addAttribute(cssAttr, CSS.Attribute.BORDER_STYLE,
+                                   "solid");
+            cssAttr = addAttribute(cssAttr, CSS.Attribute.BORDER_COLOR,
+                                   new CSSColor("black"));
+          }
+      }
+    return cssAttr;
+  }
+
+  /**
+   * Adds an attribute to the given set and returns a new set. This is implemented
+   * to convert StyleConstants attributes to CSS before forwarding them to the superclass.
+   * The StyleConstants attribute do not have corresponding CSS entry, the attribute
+   * is stored (but will likely not be used).
+   *
+   * @param old - the old set
+   * @param key - the non-null attribute key
+   * @param value - the attribute value
+   * @return the updated set
+   */
+  public AttributeSet addAttribute(AttributeSet old, Object key,
+                                   Object value)
+  {
+    // FIXME: Not implemented.
+    return super.addAttribute(old, key, value);
+  }
+
+  /**
+   * Adds a set of attributes to the element. If any of these attributes are
+   * StyleConstants, they will be converted to CSS before forwarding to the
+   * superclass.
+   *
+   * @param old - the old set
+   * @param attr - the attributes to add
+   * @return the updated attribute set
+   */
+  public AttributeSet addAttributes(AttributeSet old, AttributeSet attr)
+  {
+    // FIXME: Not implemented.
+    return super.addAttributes(old, attr);
+  }
+
+  /**
+   * Removes an attribute from the set. If the attribute is a
+   * StyleConstants, it will be converted to CSS before forwarding to the
+   * superclass.
+   *
+   * @param old - the old set
+   * @param key - the non-null attribute key
+   * @return the updated set
+   */
+  public AttributeSet removeAttribute(AttributeSet old, Object key)
+  {
+    // FIXME: Not implemented.
+    return super.removeAttribute(old, key);
+  }
+
+  /**
+   * Removes an attribute from the set. If any of the attributes are
+   * StyleConstants, they will be converted to CSS before forwarding to the
+   * superclass.
+   *
+   * @param old - the old set
+   * @param attrs - the attributes to remove
+   * @return the updated set
+   */
+  public AttributeSet removeAttributes(AttributeSet old, AttributeSet attrs)
+  {
+    // FIXME: Not implemented.
+    return super.removeAttributes(old, attrs);
+  }
+
+  /**
+   * Removes a set of attributes for the element. If any of the attributes is a
+   * StyleConstants, they will be converted to CSS before forwarding to the
+   * superclass.
+   *
+   * @param old - the old attribute set
+   * @param names - the attribute names
+   * @return the update attribute set
+   */
+  public AttributeSet removeAttributes(AttributeSet old, Enumeration<?> names)
+  {
+    // FIXME: Not implemented.
+    return super.removeAttributes(old, names);
+  }
+
+  /**
+   * Creates a compact set of attributes that might be shared. This is a hook
+   * for subclasses that want to change the behaviour of SmallAttributeSet.
+   *
+   * @param a - the set of attributes to be represented in the compact form.
+   * @return the set of attributes created
+   */
+  protected StyleContext.SmallAttributeSet createSmallAttributeSet(AttributeSet a)
+  {
+    return super.createSmallAttributeSet(a);
+  }
+
+  /**
+   * Creates a large set of attributes. This set is not shared. This is a hook
+   * for subclasses that want to change the behaviour of the larger attribute
+   * storage format.
+   *
+   * @param a - the set of attributes to be represented in the larger form.
+   * @return the large set of attributes.
+   */
+  protected MutableAttributeSet createLargeAttributeSet(AttributeSet a)
+  {
+    return super.createLargeAttributeSet(a);
+  }
+
+  /**
+   * Gets the font to use for the given set.
+   *
+   * @param a - the set to get the font for.
+   * @return the font for the set
+   */
+  public Font getFont(AttributeSet a)
+  {
+    int realSize = getFontSize(a);
+
+    // Decrement size for subscript and superscript.
+    Object valign = a.getAttribute(CSS.Attribute.VERTICAL_ALIGN);
+    if (valign != null)
+      {
+        String v = valign.toString();
+        if (v.contains("sup") || v.contains("sub"))
+          realSize -= 2;
+      }
+
+    // TODO: Convert font family.
+    String family = "SansSerif";
+
+    int style = Font.PLAIN;
+    FontWeight weight = (FontWeight) a.getAttribute(CSS.Attribute.FONT_WEIGHT);
+    if (weight != null)
+      style |= weight.getValue();
+    FontStyle fStyle = (FontStyle) a.getAttribute(CSS.Attribute.FONT_STYLE);
+    if (fStyle != null)
+      style |= fStyle.getValue();
+    return new Font(family, style, realSize);
+  }
+
+  /**
+   * Determines the EM base value based on the specified attributes.
+   *
+   * @param atts the attibutes
+   *
+   * @return the EM base value
+   */
+  float getEMBase(AttributeSet atts)
+  {
+    Font font = getFont(atts);
+    FontRenderContext ctx = new FontRenderContext(null, false, false);
+    Rectangle2D bounds = font.getStringBounds("M", ctx);
+    return (float) bounds.getWidth();
+  }
+
+  /**
+   * Determines the EX base value based on the specified attributes.
+   *
+   * @param atts the attibutes
+   *
+   * @return the EX base value
+   */
+  float getEXBase(AttributeSet atts)
+  {
+    Font font = getFont(atts);
+    FontRenderContext ctx = new FontRenderContext(null, false, false);
+    Rectangle2D bounds = font.getStringBounds("x", ctx);
+    return (float) bounds.getHeight();
+  }
+
+  /**
+   * Resolves the fontsize for a given set of attributes.
+   *
+   * @param atts the attributes
+   *
+   * @return the resolved font size
+   */
+  private int getFontSize(AttributeSet atts)
+  {
+    int size = 12;
+    if (atts.isDefined(CSS.Attribute.FONT_SIZE))
+      {
+        FontSize fs = (FontSize) atts.getAttribute(CSS.Attribute.FONT_SIZE);
+        if (fs.isRelative())
+          {
+            int parSize = 12;
+            AttributeSet resolver = atts.getResolveParent();
+            if (resolver != null)
+              parSize = getFontSize(resolver);
+            size = fs.getValue(parSize);
+          }
+        else
+          {
+            size = fs.getValue();
+          }
+      }
+    else
+      {
+        AttributeSet resolver = atts.getResolveParent();
+        if (resolver != null)
+          size = getFontSize(resolver);
+      }
+    return size;
+  }
+
+  /**
+   * Takes a set of attributes and turns it into a foreground
+   * color specification. This is used to specify things like, brigher, more hue
+   * etc.
+   *
+   * @param a - the set to get the foreground color for
+   * @return the foreground color for the set
+   */
+  public Color getForeground(AttributeSet a)
+  {
+    CSSColor c = (CSSColor) a.getAttribute(CSS.Attribute.COLOR);
+    Color color = null;
+    if (c != null)
+      color = c.getValue();
+    return color;
+  }
+
+  /**
+   * Takes a set of attributes and turns it into a background
+   * color specification. This is used to specify things like, brigher, more hue
+   * etc.
+   *
+   * @param a - the set to get the background color for
+   * @return the background color for the set
+   */
+  public Color getBackground(AttributeSet a)
+  {
+    CSSColor c = (CSSColor) a.getAttribute(CSS.Attribute.BACKGROUND_COLOR);
+    Color color = null;
+    if (c != null)
+      color = c.getValue();
+    return color;
+  }
+
+  /**
+   * Gets the box formatter to use for the given set of CSS attributes.
+   *
+   * @param a - the given set
+   * @return the box formatter
+   */
+  public BoxPainter getBoxPainter(AttributeSet a)
+  {
+    return new BoxPainter(a, this);
+  }
+
+  /**
+   * Gets the list formatter to use for the given set of CSS attributes.
+   *
+   * @param a - the given set
+   * @return the list formatter
+   */
+  public ListPainter getListPainter(AttributeSet a)
+  {
+    return new ListPainter(a, this);
+  }
+
+  /**
+   * Sets the base font size between 1 and 7.
+   *
+   * @param sz - the new font size for the base.
+   */
+  public void setBaseFontSize(int sz)
+  {
+    if (sz <= 7 && sz >= 1)
+      baseFontSize = sz;
+  }
+
+  /**
+   * Sets the base font size from the String. It can either identify
+   * a specific font size (between 1 and 7) or identify a relative
+   * font size such as +1 or -2.
+   *
+   * @param size - the new font size as a String.
+   */
+  public void setBaseFontSize(String size)
+  {
+    size = size.trim();
+    int temp = 0;
+    try
+      {
+        if (size.length() == 2)
+          {
+            int i = new Integer(size.substring(1)).intValue();
+            if (size.startsWith("+"))
+              temp = baseFontSize + i;
+            else if (size.startsWith("-"))
+              temp = baseFontSize - i;
+          }
+        else if (size.length() == 1)
+          temp = new Integer(size.substring(0)).intValue();
+
+        if (temp <= 7 && temp >= 1)
+          baseFontSize = temp;
+      }
+    catch (NumberFormatException nfe)
+      {
+        // Do nothing here
+      }
+  }
+
+  /**
+   * TODO
+   *
+   * @param pt - TODO
+   * @return TODO
+   */
+  public static int getIndexOfSize(float pt)
+  {
+    // FIXME: Not implemented.
+    return 0;
+  }
+
+  /**
+   * Gets the point size, given a size index.
+   *
+   * @param index - the size index
+   * @return the point size.
+   */
+  public float getPointSize(int index)
+  {
+    // FIXME: Not implemented.
+    return 0;
+  }
+
+  /**
+   * Given the string of the size, returns the point size value.
+   *
+   * @param size - the string representation of the size.
+   * @return - the point size value.
+   */
+  public float getPointSize(String size)
+  {
+    // FIXME: Not implemented.
+    return 0;
+  }
+
+  /**
+   * Convert the color string represenation into java.awt.Color. The valid
+   * values are like "aqua" , "#00FFFF" or "rgb(1,6,44)".
+   *
+   * @param colorName the color to convert.
+   * @return the matching java.awt.color
+   */
+  public Color stringToColor(String colorName)
+  {
+    return CSSColor.convertValue(colorName);
+  }
+
+  /**
+   * This class carries out some of the duties of CSS formatting. This enables views
+   * to present the CSS formatting while not knowing how the CSS values are cached.
+   *
+   * This object is reponsible for the insets of a View and making sure
+   * the background is maintained according to the CSS attributes.
+   *
+   * @author Lillian Angel (langel@redhat.com)
+   */
+  public static class BoxPainter extends Object implements Serializable
+  {
+
+    /**
+     * The left inset.
+     */
+    private float leftInset;
+
+    /**
+     * The right inset.
+     */
+    private float rightInset;
+
+    /**
+     * The top inset.
+     */
+    private float topInset;
+
+    /**
+     * The bottom inset.
+     */
+    private float bottomInset;
+
+    /**
+     * The border of the box.
+     */
+    private Border border;
+
+    private float leftPadding;
+    private float rightPadding;
+    private float topPadding;
+    private float bottomPadding;
+
+    /**
+     * The background color.
+     */
+    private Color background;
+
+    /**
+     * Package-private constructor.
+     *
+     * @param as - AttributeSet for painter
+     */
+    BoxPainter(AttributeSet as, StyleSheet ss)
+    {
+      float emBase = ss.getEMBase(as);
+      float exBase = ss.getEXBase(as);
+      // Fetch margins.
+      Length l = (Length) as.getAttribute(CSS.Attribute.MARGIN_LEFT);
+      if (l != null)
+        {
+          l.setFontBases(emBase, exBase);
+          leftInset = l.getValue();
+        }
+      l = (Length) as.getAttribute(CSS.Attribute.MARGIN_RIGHT);
+      if (l != null)
+        {
+          l.setFontBases(emBase, exBase);
+          rightInset = l.getValue();
+        }
+      l = (Length) as.getAttribute(CSS.Attribute.MARGIN_TOP);
+      if (l != null)
+        {
+          l.setFontBases(emBase, exBase);
+          topInset = l.getValue();
+        }
+      l = (Length) as.getAttribute(CSS.Attribute.MARGIN_BOTTOM);
+      if (l != null)
+        {
+          l.setFontBases(emBase, exBase);
+          bottomInset = l.getValue();
+        }
+
+      // Fetch padding.
+      l = (Length) as.getAttribute(CSS.Attribute.PADDING_LEFT);
+      if (l != null)
+        {
+          l.setFontBases(emBase, exBase);
+          leftPadding = l.getValue();
+        }
+      l = (Length) as.getAttribute(CSS.Attribute.PADDING_RIGHT);
+      if (l != null)
+        {
+          l.setFontBases(emBase, exBase);
+          rightPadding = l.getValue();
+        }
+      l = (Length) as.getAttribute(CSS.Attribute.PADDING_TOP);
+      if (l != null)
+        {
+          l.setFontBases(emBase, exBase);
+          topPadding = l.getValue();
+        }
+      l = (Length) as.getAttribute(CSS.Attribute.PADDING_BOTTOM);
+      if (l != null)
+        {
+          l.setFontBases(emBase, exBase);
+          bottomPadding = l.getValue();
+        }
+
+      // Determine border.
+      border = new CSSBorder(as, ss);
+
+      // Determine background.
+      background = ss.getBackground(as);
+
+    }
+
+
+    /**
+     * Gets the inset needed on a given side to account for the margin, border
+     * and padding.
+     *
+     * @param size - the size of the box to get the inset for. View.TOP, View.LEFT,
+     * View.BOTTOM or View.RIGHT.
+     * @param v - the view making the request. This is used to get the AttributeSet,
+     * amd may be used to resolve percentage arguments.
+     * @return the inset
+     * @throws IllegalArgumentException - for an invalid direction.
+     */
+    public float getInset(int size, View v)
+    {
+      float inset;
+      switch (size)
+        {
+        case View.TOP:
+          inset = topInset;
+          if (border != null)
+            inset += border.getBorderInsets(null).top;
+          inset += topPadding;
+          break;
+        case View.BOTTOM:
+          inset = bottomInset;
+          if (border != null)
+            inset += border.getBorderInsets(null).bottom;
+          inset += bottomPadding;
+          break;
+        case View.LEFT:
+          inset = leftInset;
+          if (border != null)
+            inset += border.getBorderInsets(null).left;
+          inset += leftPadding;
+          break;
+        case View.RIGHT:
+          inset = rightInset;
+          if (border != null)
+            inset += border.getBorderInsets(null).right;
+          inset += rightPadding;
+          break;
+        default:
+          inset = 0.0F;
+      }
+      return inset;
+    }
+
+    /**
+     * Paints the CSS box according to the attributes given. This should
+     * paint the border, padding and background.
+     *
+     * @param g - the graphics configuration
+     * @param x - the x coordinate
+     * @param y - the y coordinate
+     * @param w - the width of the allocated area
+     * @param h - the height of the allocated area
+     * @param v - the view making the request
+     */
+    public void paint(Graphics g, float x, float y, float w, float h, View v)
+    {
+      int inX = (int) (x + leftInset);
+      int inY = (int) (y + topInset);
+      int inW = (int) (w - leftInset - rightInset);
+      int inH = (int) (h - topInset - bottomInset);
+      if (background != null)
+        {
+          g.setColor(background);
+          g.fillRect(inX, inY, inW, inH);
+        }
+      if (border != null)
+        {
+          border.paintBorder(null, g, inX, inY, inW, inH);
+        }
+    }
+  }
+
+  /**
+   * This class carries out some of the CSS list formatting duties. Implementations
+   * of this class enable views to present the CSS formatting while not knowing anything
+   * about how the CSS values are being cached.
+   *
+   * @author Lillian Angel (langel@redhat.com)
+   */
+  public static class ListPainter implements Serializable
+  {
+
+    /**
+     * Attribute set for painter
+     */
+    private AttributeSet attributes;
+
+    /**
+     * The associated style sheet.
+     */
+    private StyleSheet styleSheet;
+
+    /**
+     * The bullet type.
+     */
+    private String type;
+
+    /**
+     * Package-private constructor.
+     *
+     * @param as - AttributeSet for painter
+     */
+    ListPainter(AttributeSet as, StyleSheet ss)
+    {
+      attributes = as;
+      styleSheet = ss;
+      type = (String) as.getAttribute(CSS.Attribute.LIST_STYLE_TYPE);
+    }
+
+    /**
+     * Cached rectangle re-used in the paint method below.
+     */
+    private final Rectangle tmpRect = new Rectangle();
+
+    /**
+     * Paints the CSS list decoration according to the attributes given.
+     *
+     * @param g - the graphics configuration
+     * @param x - the x coordinate
+     * @param y - the y coordinate
+     * @param w - the width of the allocated area
+     * @param h - the height of the allocated area
+     * @param v - the view making the request
+     * @param item - the list item to be painted >=0.
+     */
+    public void paint(Graphics g, float x, float y, float w, float h, View v,
+                      int item)
+    {
+      // FIXME: This is a very simplistic list rendering. We still need
+      // to implement different bullet types (see type field) and custom
+      // bullets via images.
+      View itemView = v.getView(item);
+      AttributeSet viewAtts = itemView.getAttributes();
+      Object tag = viewAtts.getAttribute(StyleConstants.NameAttribute);
+      // Only paint something here when the child view is an LI tag
+      // and the calling view is some of the list tags then).
+      if (tag != null && tag == HTML.Tag.LI)
+        {
+          g.setColor(Color.BLACK);
+          int centerX = (int) (x - 12);
+          int centerY = -1;
+          // For paragraphs (almost all cases) center bullet vertically
+          // in the middle of the first line.
+          tmpRect.setBounds((int) x, (int) y, (int) w, (int) h);
+          if (itemView.getViewCount() > 0)
+            {
+              View v1 = itemView.getView(0);
+              if (v1 instanceof ParagraphView && v1.getViewCount() > 0)
+                {
+                  Shape a1 = itemView.getChildAllocation(0, tmpRect);
+                  Rectangle r1 = a1 instanceof Rectangle ? (Rectangle) a1
+                                                         : a1.getBounds();
+                  ParagraphView par = (ParagraphView) v1;
+                  Shape a = par.getChildAllocation(0, r1);
+                  if (a != null)
+                    {
+                      Rectangle r = a instanceof Rectangle ? (Rectangle) a
+                                                           : a.getBounds();
+                      centerY = (int) (r.height / 2 + r.y);
+                    }
+                }
+            }
+          if (centerY == -1)
+            {
+              centerY =(int) (h / 2 + y);
+            }
+          g.fillOval(centerX - 3, centerY - 3, 6, 6);
+        }
+    }
+  }
+
+  /**
+   * Converts an AttributeSet to a Map. This is used for CSS resolving.
+   *
+   * @param atts the attributes to convert
+   *
+   * @return the converted map
+   */
+  private Map<String,String> attributeSetToMap(AttributeSet atts)
+  {
+    HashMap<String,String> map = new HashMap<String,String>();
+    Enumeration<?> keys = atts.getAttributeNames();
+    while (keys.hasMoreElements())
+      {
+        Object key = keys.nextElement();
+        Object value = atts.getAttribute(key);
+        map.put(key.toString(), value.toString());
+      }
+    return map;
+  }
+}