/*!
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program 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 Lesser General Public License for more details.
*
* Copyright (c) 2002-2013 Pentaho Corporation.. All rights reserved.
*/
package org.pentaho.reporting.designer.core.editor.format;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import org.pentaho.reporting.engine.classic.core.Element;
import org.pentaho.reporting.engine.classic.core.style.ElementStyleSheet;
import org.pentaho.reporting.engine.classic.core.style.ResolverStyleSheet;
import org.pentaho.reporting.engine.classic.core.style.StyleKey;
import org.pentaho.reporting.engine.classic.core.style.resolver.SimpleStyleResolver;
import org.pentaho.reporting.libraries.base.util.ObjectUtilities;
public class EditableStyleSheet extends ElementStyleSheet
{
private HashSet<StyleKey> editedKeys;
private HashSet<StyleKey> removedKeys;
private HashMap<StyleKey, Object> parentValues;
public EditableStyleSheet()
{
editedKeys = new HashSet<StyleKey>();
removedKeys = new HashSet<StyleKey>();
parentValues = new HashMap<StyleKey, Object>();
}
public void copyParentValues(final ElementStyleSheet parent)
{
if (parent != null)
{
final StyleKey[] definedPropertyNamesArray = parent.getDefinedPropertyNamesArray();
for (int i = 0; i < definedPropertyNamesArray.length; i++)
{
final StyleKey styleKey = definedPropertyNamesArray[i];
if (styleKey == null)
{
continue;
}
setStyleProperty(styleKey, parent.getStyleProperty(styleKey));
}
final StyleKey[] propertyKeys = parent.getPropertyKeys();
for (int i = 0; i < propertyKeys.length; i++)
{
final StyleKey propertyKey = propertyKeys[i];
parentValues.put(propertyKey, parent.getStyleProperty(propertyKey));
}
}
editedKeys.clear();
removedKeys.clear();
}
public void clearEdits()
{
editedKeys.clear();
removedKeys.clear();
final StyleKey[] propertyKeys = getPropertyKeys();
for (int i = 0; i < propertyKeys.length; i++)
{
final StyleKey propertyKey = propertyKeys[i];
parentValues.put(propertyKey, getStyleProperty(propertyKey));
}
}
public static EditableStyleSheet create(final List<Element> visualElements)
{
return create(visualElements.toArray(new Element[visualElements.size()]));
}
public static EditableStyleSheet create(final Element... visualElements)
{
final SimpleStyleResolver styleResolver = new SimpleStyleResolver(true);
// collect all common values ..
final StyleKey[] keys = StyleKey.getDefinedStyleKeys();
final Object[] values = new Object[keys.length];
final ResolverStyleSheet[] styles = new ResolverStyleSheet[visualElements.length];
for (int i = 0; i < styles.length; i++)
{
final ResolverStyleSheet style = new ResolverStyleSheet();
styleResolver.resolve(visualElements[i], style);
styles[i] = style;
}
for (int i = 0; i < keys.length; i++)
{
final StyleKey styleKey = keys[i];
for (int elementIdx = 0; elementIdx < visualElements.length; elementIdx++)
{
final Object o = styles[elementIdx].getStyleProperty(styleKey);
if (values[i] == null)
{
values[i] = o;
}
else
{
if (ObjectUtilities.equal(values[i], o) == false)
{
values[i] = null;
break;
}
}
}
}
final EditableStyleSheet styleSheet = new EditableStyleSheet();
for (int i = 0; i < keys.length; i++)
{
final StyleKey styleKey = keys[i];
styleSheet.setStyleProperty(styleKey, values[i]);
}
return styleSheet;
}
/**
* Sets a style property (or removes the style if the value is <code>null</code>).
*
* @param key the style key (<code>null</code> not permitted).
* @param value the value.
* @throws NullPointerException if the given key is null.
* @throws ClassCastException if the value cannot be assigned with the given key.
*/
public void setStyleProperty(final StyleKey key, final Object value)
{
final Object styleProperty = parentValues.get(key);
if (styleProperty == value || ObjectUtilities.equal(styleProperty, value))
{
return;
}
editedKeys.add(key);
if (value == null)
{
removedKeys.add(key);
}
else
{
removedKeys.remove(key);
}
super.setStyleProperty(key, value);
}
/**
* Returns the value of a style. If the style is not found in this style-sheet, the code looks in the parent
* style-sheets. If the style is not found in any of the parent style-sheets, then the default value (possibly
* <code>null</code>) is returned.
*
* @param key the style key.
* @param defaultValue the default value (<code>null</code> permitted).
* @return the value.
*/
public Object getStyleProperty(final StyleKey key, final Object defaultValue)
{
if (removedKeys.contains(key))
{
return defaultValue;
}
return super.getStyleProperty(key, defaultValue);
}
public StyleKey[] getDefinedPropertyNamesArray()
{
final StyleKey[] keys = getPropertyKeys();
for (int i = 0; i < keys.length; i++)
{
final StyleKey key = keys[i];
if (editedKeys.contains(key) == false)
{
keys[i] = null;
}
}
return keys;
}
}