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+/* ViewAttributeSet.java -- The AttributeSet used by HTML views
+ Copyright (C) 2006 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 java.util.ArrayList;
+import java.util.Enumeration;
+
+import javax.swing.text.AttributeSet;
+import javax.swing.text.Element;
+import javax.swing.text.StyleConstants;
+import javax.swing.text.View;
+
+/**
+ * An AttributeSet implemenation that is used by the HTML views. This
+ * AttributeSet is created by StyleSheet.getViewAttributes() and combines
+ * the following attributes:
+ * - The original attributes of the View's element.
+ * - Any translated (HTML->CSS) attributes, as returned by
+ * StyleSheet.translateHTMLToCS().
+ * - CSS Styles as resolved by the CSS stylesheet.
+ *
+ * In addition to that, it resolves attributes to the parent views, if
+ * a CSS attribute is requested that is inheritable.
+ *
+ * @author Roman Kennke (kennke@aicas.com)
+ */
+class ViewAttributeSet
+ extends MultiAttributeSet
+{
+
+ /**
+ * The view for which we are the AttributeSet.
+ */
+ private View view;
+
+ /**
+ * The stylesheet to use.
+ */
+ private StyleSheet styleSheet;
+
+ /**
+ * Creates a new instance.
+ *
+ * @param v the view for which to do the AttributeSet
+ */
+ ViewAttributeSet(View v, StyleSheet ss)
+ {
+ styleSheet = ss;
+ view = v;
+ ArrayList atts = new ArrayList();
+
+ Element el = v.getElement();
+ AttributeSet elAtts = el.getAttributes();
+ AttributeSet htmlAtts = styleSheet.translateHTMLToCSS(elAtts);
+ if (htmlAtts.getAttributeCount() > 0)
+ atts.add(htmlAtts);
+
+ if (el.isLeaf())
+ {
+ Enumeration n = elAtts.getAttributeNames();
+ while (n.hasMoreElements())
+ {
+ Object key = n.nextElement();
+ if (key instanceof HTML.Tag)
+ {
+ AttributeSet rule = styleSheet.getRule((HTML.Tag) key, el);
+ if (rule != null)
+ atts.add(rule);
+ }
+ }
+ }
+ else
+ {
+ HTML.Tag tag =
+ (HTML.Tag) elAtts.getAttribute(StyleConstants.NameAttribute);
+ AttributeSet rule = styleSheet.getRule(tag, el);
+ if (rule != null)
+ atts.add(rule);
+ }
+
+ AttributeSet[] atts1 = new AttributeSet[atts.size()];
+ atts1 = (AttributeSet[]) atts.toArray(atts1);
+ init(atts1);
+ }
+
+ /**
+ * Fetches the attribute for the specific ckey. If the attribute
+ * can't be found and the key is a CSS.Attribute that is inherited,
+ * then the attribute is looked up in the resolve parent.
+ */
+ public Object getAttribute(Object key)
+ {
+ Object val = super.getAttribute(key);
+ if (val == null)
+ {
+ // Didn't find value. If the key is a CSS.Attribute, and is
+ // inherited, then ask the resolve parent.
+ if (key instanceof CSS.Attribute)
+ {
+ CSS.Attribute cssKey = (CSS.Attribute) key;
+ if (cssKey.isInherited())
+ {
+ AttributeSet resolveParent = getResolveParent();
+ if (resolveParent != null)
+ val = resolveParent.getAttribute(cssKey);
+ }
+ }
+ }
+ return val;
+ }
+
+ /**
+ * Returns the resolve parent of this AttributeSet. This is the AttributeSet
+ * returned by the parent view if available.
+ */
+ public AttributeSet getResolveParent()
+ {
+ AttributeSet parent = null;
+ if (view != null)
+ {
+ View parentView = view.getParent();
+ if (parentView != null)
+ parent = parentView.getAttributes();
+ }
+ return parent;
+ }
+}