jsf/plugins/org.eclipse.jst.pagedesigner/src/org/eclipse/jst/pagedesigner/css2/style/AbstractStyle.java - jsf/webtools.jsf - Git at Google

 /*******************************************************************************
  * Copyright (c) 2006 Sybase, Inc. and others.
  *
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  *     Sybase, Inc. - initial API and implementation
  *******************************************************************************/
 package org.eclipse.jst.pagedesigner.css2.style;

 import java.util.HashMap;
 import java.util.Map;

 import org.eclipse.draw2d.geometry.Insets;
 import org.eclipse.jst.pagedesigner.IHTMLConstants;
 import org.eclipse.jst.pagedesigner.css2.CSSUtil;
 import org.eclipse.jst.pagedesigner.css2.ICSSStyle;
 import org.eclipse.jst.pagedesigner.css2.font.CSSFontManager;
 import org.eclipse.jst.pagedesigner.css2.font.ICSSFont;
 import org.eclipse.jst.pagedesigner.css2.font.ICSSFontManager;
 import org.eclipse.jst.pagedesigner.css2.list.CounterHelper;
 import org.eclipse.jst.pagedesigner.css2.list.CounterValueGenerator;
 import org.eclipse.jst.pagedesigner.css2.list.ICounterValueGenerator;
 import org.eclipse.jst.pagedesigner.css2.property.CSSMetaRegistry;
 import org.eclipse.jst.pagedesigner.css2.property.ICSSPropertyID;
 import org.eclipse.jst.pagedesigner.css2.property.ICSSPropertyMeta;
 import org.eclipse.jst.pagedesigner.css2.value.Length;
 import org.eclipse.jst.pagedesigner.utils.DOMUtil;
 import org.eclipse.wst.sse.core.internal.provisional.INodeNotifier;
 import org.w3c.dom.Element;
 import org.w3c.dom.Node;
 import org.w3c.dom.css.CSSStyleDeclaration;
 import org.w3c.dom.css.CSSValue;

 /**
  * @author mengbo
  */
 public class AbstractStyle implements ICSSStyle
 {
 	private final Element _element;

 	private Map _cachedValues = new HashMap();

 	private ICSSFont _font = null;

 	private CSSStyleDeclaration _cache;

 	private CSSStyleDeclaration _defaultCache;

 	private boolean _cssDeclareWasSearched = false;

 	private boolean _cssDefaultDeclareWasSearched = false;

 	private Insets _borderInsets, _marginInsets, _paddingInsets;

 	private ICSSStyle _parentStyle;

 	private HashMap _counters = null;

 	/**
 	 * @return the element this style if for
 	 */
 	public Element getElement() {
 		return _element;
 	}

 	/**
 	 * @param element
 	 */
 	public AbstractStyle(Element element) {
 		_element = element;
 	}

 	/**
 	 * reset all the cache.
 	 */
 	public void reset() {
 		_cachedValues.clear();
 		_font = null;
 		_cache = null;
 		_defaultCache = null;
 		_cssDeclareWasSearched = false;
 		_cssDefaultDeclareWasSearched = false;
 		// if (_counters != null)
 		// {
 		// unregistCounter();
 		// _counters.clear();
 		// _counters = null;
 		// }
 		_borderInsets = _marginInsets = _paddingInsets = null;
 	}

 	/**
 	 * this is a hook method so caller can use it to override default
 	 * calculation. Note, after the call to <code>reset</code>, it will be
 	 * lost.
 	 *
 	 * @param property
 	 * @param value
 	 */
 	public void setStyleProperty(String property, Object value) {
 		_cachedValues.put(property, value);
 	}

 	/**
 	 * get a style property value.
 	 *
 	 * @param property
 	 * @return the style property
 	 */
 	public Object getStyleProperty(String property) {
 		Object value = _cachedValues.get(property);
 		if (value == null) {
 			value = calculateProperty(property);
 			if (value != null) {
 				_cachedValues.put(property, value);
 			}
 		}
 		return value;
 	}

 	/**
 	 * in this method, should first check the "style" attribute, then combine
 	 * that with document style.
 	 *
 	 * @return the style
 	 */
 	protected CSSStyleDeclaration calculateDeclaration() {
 		String name = getHtmlElement().getAttribute("id");
 		if (name == null || name.length() == 0) {
 			name = getHtmlElement().getAttribute("name");
 		}
 		return CSSUtil.getCSSDeclaration(this.getHtmlElement(), name);
 	}

 	/**
 	 * @return the style
 	 */
 	protected CSSStyleDeclaration calculateDefaultDeclaration() {
 		return CSSUtil.getDefaultCSSDeclaration(this.getHtmlElement(), null);
 	}

 	/**
 	 * @return the style declaration
 	 */
 	public CSSStyleDeclaration getDeclaration() {
 		// FIXME:may need to be change, boolean variable is not a best way.
 		if (!_cssDeclareWasSearched) {
 			_cache = calculateDeclaration();
 			_cssDeclareWasSearched = true;
 		}
 		return _cache;
 	}

 	/**
 	 * @return the default declaration
 	 */
 	public CSSStyleDeclaration getDefaultDeclaration() {
 		// FIXME:may need to be change, boolean variable is not a best way.
 		if (!_cssDefaultDeclareWasSearched) {
 			_defaultCache = calculateDefaultDeclaration();
 			_cssDefaultDeclareWasSearched = true;
 		}
 		return _defaultCache;
 	}

 	/* (non-Javadoc)
 	 * @see org.eclipse.jst.pagedesigner.css2.ICSSStyle#getHTMLelementInitValue(java.lang.String)
 	 */
 	public Object getHTMLelementInitValue(String propertyName) {
 		ICSSPropertyMeta meta = getPropertyMeta(propertyName);
 		if (meta != null) {
 			Object obj = meta.getHTMLElementInitialValue(_element,
 					getHTMLTag(), propertyName);
 			if (obj == null) {
 				obj = meta.getInitialValue(propertyName, this);
 			}
 			return obj;
 		}
 		return ICSSPropertyMeta.NOT_SPECIFIED;
 	}

 	/**
 	 * @param propertyName
 	 * @return the property
 	 */
 	protected Object calculateProperty(String propertyName) {
 		ICSSPropertyMeta meta = getPropertyMeta(propertyName);
 		Object result = null;
 		// get declaration
 		CSSStyleDeclaration decl = getDeclaration();
 		CSSValue value = decl == null ? null : decl
 				.getPropertyCSSValue(propertyName);
 		if (value == null) {
 			if (meta != null) {
 				result = meta.calculateHTMLAttributeOverride(_element,
 						getHTMLTag(), propertyName, this);
 				if (result != null) {
 					return result;
 				}
 			}
 			decl = getDefaultDeclaration();
 		}
 		value = decl == null ? null : decl.getPropertyCSSValue(propertyName);

 		if (value != null && value.getCssValueType() == CSSValue.CSS_INHERIT) {
 			result = getParentResultValue(meta, propertyName);
 		} else if (value == null) {
 			if (meta != null) {
 				result = meta.calculateHTMLAttributeOverride(_element,
 						getHTMLTag(), propertyName, this);
 			}
 			if (result == null) {
 				result = calculateLocalOverride(meta, propertyName);
 			}
 			if (result == null) {
 				if (meta == null) {
 					result = ICSSPropertyMeta.NOT_SPECIFIED;
 				} else {
 					if (meta.isInherited()) {
 						result = getParentResultValue(meta, propertyName);
 					} else {
 						result = meta.getInitialValue(propertyName, this);
 					}
 				}
 			}
 		} else {
 			result = calculateCSSValueResult(meta, value, propertyName);
 		}
 		return result;
 	}

 	/**
 	 * get the corresponding HTML tag for this style. This is for certain HTML
 	 * tag can also provide style information.
 	 *
 	 * @return the html tag
 	 */
 	protected String getHTMLTag() {
 		return _element.getTagName();
 	}

 	/**
 	 * @param propertyName
 	 * @return the property meta for property name
 	 */
 	protected ICSSPropertyMeta getPropertyMeta(String propertyName) {
 		return CSSMetaRegistry.getInstance().getMeta(propertyName);
 	}

 	/**
 	 * convert the CSSValue to the property type specified data result.
 	 *
 	 * @param meta
 	 * @param value
 	 * @param propertyName
 	 * @return should not return null.
 	 */
 	protected Object calculateCSSValueResult(ICSSPropertyMeta meta,
 			CSSValue value, String propertyName) {
 		if (meta == null) {
 			return ICSSPropertyMeta.NOT_SPECIFIED;
 		}
         return meta.calculateCSSValueResult(value, propertyName, this);
 	}

 	/**
 	 * it is possible that some attribute of the element may provide style
 	 * information. child class should override this method. Also, some element
 	 * type may have internally build style, such as input-submit may use
 	 * special border. NOTE: it is very important that in calculateLocalOverride
 	 * you don't directly or indirectly call getStyleProperty() to avoid
 	 * deadloop.
 	 *
 	 * @param meta
 	 * @param propertyName
 	 * @return null means no style information in other attributes. Otherwise
 	 *         return property specific data result -- normally will use meta to
 	 *         convert the attribute.
 	 */
 	protected Object calculateLocalOverride(ICSSPropertyMeta meta,
 			String propertyName) {
 		// // do some default margin thing.
 		// if (ICSSPropertyID.ATTR_MARGIN_RIGHT.equalsIgnoreCase(propertyName)
 		// || ICSSPropertyID.ATTR_MARGIN_BOTTOM.equalsIgnoreCase(propertyName))
 		// {
 		// return MARGIN_LENGTH;
 		// }
 		// else if
 		// (ICSSPropertyID.ATTR_MARGIN_LEFT.equalsIgnoreCase(propertyName))
 		// {
 		// // to make a little room, so it is possible for user to position the
 		// // mouse before the first element in a block.
 		// return MARGIN_LEFT;
 		// }
 		return null;
 	}

 	/**
 	 * This is only called when inherit value from parent.
 	 *
 	 * @param meta
 	 * @param propertyName
 	 * @return the result value
 	 */
 	protected Object getParentResultValue(ICSSPropertyMeta meta,
 			String propertyName) {
 		ICSSStyle style = getParentStyle();
 		return style.getStyleProperty(propertyName);
 	}

 	/**
 	 * @param parentStyle
 	 */
 	public void setParentStyle(ICSSStyle parentStyle) {
 		this._parentStyle = parentStyle;
 		reset();
 	}

 	public ICSSStyle getParentStyle() {
 		if (_parentStyle != null) {
 			return _parentStyle;
 		}
 		Node node = _element.getParentNode();
 		while (node instanceof Element && node instanceof INodeNotifier) {
 			ICSSStyle parentStyle = (ICSSStyle) ((INodeNotifier) node)
 					.getAdapterFor(ICSSStyle.class);
 			if (parentStyle != null) {
 				return parentStyle;
 			}
             node = node.getParentNode();
 		}
 		return DefaultStyle.getInstance();
 	}

 	/**
 	 * Will not return null
 	 *
 	 * @return the font
 	 */
 	public ICSSFont getCSSFont() {
 		if (_font == null) {
 			_font = getFontManager().createFont(this);
 		}
 		return _font;
 	}

 	/**
 	 * @return
 	 */
 	private ICSSFontManager getFontManager() {
 		return CSSFontManager.getInstance();
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.jst.pagedesigner.css2.ICSSStyle#dispose()
 	 */
 	public void dispose() {
         // TODO: anything to dispose?
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.jst.pagedesigner.css2.ICSSStyle#getMarginInsets()
 	 */
 	public Insets getMarginInsets() {
 		if (_marginInsets == null) {
 			int top = getInsetProperty(ICSSPropertyID.ATTR_MARGIN_TOP);
 			int left = getInsetProperty(ICSSPropertyID.ATTR_MARGIN_LEFT);
 			int bottom = getInsetProperty(ICSSPropertyID.ATTR_MARGIN_BOTTOM);
 			int right = getInsetProperty(ICSSPropertyID.ATTR_MARGIN_RIGHT);
 			_marginInsets = new Insets(top, left, bottom, right);
 		}
 		return _marginInsets;
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.jst.pagedesigner.css2.ICSSStyle#getPaddingInsets()
 	 */
 	public Insets getPaddingInsets() {
 		if (_paddingInsets == null) {
 			int top = getInsetProperty(ICSSPropertyID.ATTR_PADDING_TOP)+ARTIFICIAL_BORDER_OFFSET;
 			int left = getInsetProperty(ICSSPropertyID.ATTR_PADDING_LEFT)+ARTIFICIAL_BORDER_OFFSET;
 			int bottom = getInsetProperty(ICSSPropertyID.ATTR_PADDING_BOTTOM)+ARTIFICIAL_BORDER_OFFSET;
 			int right = getInsetProperty(ICSSPropertyID.ATTR_PADDING_RIGHT)+ARTIFICIAL_BORDER_OFFSET;
 			_paddingInsets = new Insets(top, left, bottom, right);
 		}
 		return _paddingInsets;
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.jst.pagedesigner.css2.ICSSStyle#getBorderInsets()
 	 */
 	public Insets getBorderInsets() {
 		if (_borderInsets == null) {
 			int top = getInsetProperty(ICSSPropertyID.ATTR_BORDER_TOP_WIDTH);
 			int left = getInsetProperty(ICSSPropertyID.ATTR_BORDER_LEFT_WIDTH);
 			int bottom = getInsetProperty(ICSSPropertyID.ATTR_BORDER_BOTTOM_WIDTH);
 			int right = getInsetProperty(ICSSPropertyID.ATTR_BORDER_RIGHT_WIDTH);
 			_borderInsets = new Insets(top, left, bottom, right);
 		}
 		return _borderInsets;
 	}

 	/**
 	 * @param border_top_width
 	 * @return
 	 */
 	private int getInsetProperty(String propertyName) {
 		Object obj = this.getStyleProperty(propertyName);
 		if (obj instanceof Length) {
 			Length l = (Length) obj;
 			if (l.isPercentage()) {
 				return 0; // FIXME:
 			}
             return l.getValue();
 		}

 		return 0;
 	}

 	public boolean isAdapterForType(Object type) {
 		return (type == ICSSStyle.class);
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.jst.pagedesigner.css2.ICSSStyle#isSizeIncludeBorderPadding()
 	 */
 	public boolean isSizeIncludeBorderPadding() {
 		String display = this.getDisplay();
 		if ("table-cell".equalsIgnoreCase(display)) {
 			return false;
 		}
 		String tag = this.getHTMLTag();
 		if ("img".equalsIgnoreCase(tag)) {
 			return false;
 		}
 		return true;
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see com.ibm.sse.model.INodeAdapter#notifyChanged(com.ibm.sse.model.INodeNotifier,
 	 *      int, java.lang.Object, java.lang.Object, java.lang.Object, int)
 	 */
 	public void notifyChanged(INodeNotifier notifier, int eventType,
 			Object changedFeature, Object oldValue, Object newValue, int pos) {
         // do nothing
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.jst.pagedesigner.css2.ICSSStyle#getBackgroundColor()
 	 */
 	public Object getColor() {
 		Object _color = null;
 		if (_color == null) {
 			_color = getStyleProperty(ICSSPropertyID.ATTR_COLOR);
 			if (_color == null) {
 				_color = getStyleProperty(ICSSPropertyID.ATTR_TEXTCOLOR);
 			}
 		}
 		return _color;
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.jst.pagedesigner.css2.ICSSStyle#getColor()
 	 */
 	public Object getBackgroundColor() {
 		Object _backgroundColor = null;
 		if (_backgroundColor == null) {
 			_backgroundColor = getStyleProperty(ICSSPropertyID.ATTR_BACKGROUND_COLOR);
 		}
 		return _backgroundColor;
 	}

 	/**
 	 * @return the html element
 	 */
 	public Element getHtmlElement() {
 		// if (_element instanceof IDOMElement)
 		// {
 		// EditPart part = (EditPart) ((IDOMElement)
 		// _element).getAdapterFor(EditPart.class);
 		// if (part instanceof ElementEditPart)
 		// {
 		// ElementEditPart elementPart = (ElementEditPart) part;
 		// ITagHandler h = elementPart.getTagHandler();
 		// if (h != null)
 		// {
 		// return h.mapCustomElement(_element);
 		// }
 		// }
 		//
 		// }
 		return _element;
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.jst.pagedesigner.css2.ICSSStyle#getDisplay()
 	 */
 	public String getDisplay() {
 		Object display = this.getStyleProperty(ICSSPropertyID.ATTR_DISPLAY);
 		String displayStr;
 		if (display == null) {
 			displayStr = ICSSPropertyID.VAL_INLINE;
 		} else if (display instanceof String) {
 			displayStr = (String) display;
 		} else {
 			displayStr = display.toString();
 		}
 		if (ICSSPropertyID.VAL_INLINE.equalsIgnoreCase(displayStr)
 				&& IHTMLConstants.TAG_TABLE.equalsIgnoreCase(getHTMLTag())) {
 			return ICSSPropertyID.VAL_INLINE_TABLE;
 		}
 		if (ICSSPropertyID.VAL_INLINE.equalsIgnoreCase(displayStr)) {
 			Object width = this.getStyleProperty(ICSSPropertyID.ATTR_WIDTH);
 			if (width instanceof Length) {
 				return ICSSPropertyID.VAL_INLINE_BLOCK;
 			}
 			Object height = this.getStyleProperty(ICSSPropertyID.ATTR_HEIGHT);
 			if (height instanceof Length) {
 				return ICSSPropertyID.VAL_INLINE_BLOCK;
 			}
 			return displayStr;
 		}
         return displayStr;
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.jst.pagedesigner.css2.ICSSStyle#getListStyle()
 	 */
 	public Map getCounters() {
 		if (_counters == null) {
 			_counters = new HashMap();
 			CounterHelper.processCounterReset(this, _counters);
 		}
 		return _counters;
 	}

 	/**
 	 * Get named counter from counters.
 	 *
 	 * see org.eclipse.jst.pagedesigner.css2.ICSSStyle#getCounter(java.lang.String)
 	 */
 	public ICounterValueGenerator findCounter(String name, boolean must) {
 		Map counters = getCounters();
 		if (counters == null || !counters.containsKey(name)) {
 			if (getParentStyle() != null
 					&& !(getParentStyle() instanceof DefaultStyle)) {
 				// ensure it is registered somewhere.
 				return getParentStyle().findCounter(name, must);
 			}
 			// must is called by counter-increment
 			else if (must) {
 				// the caller should do the other setting.
 				ICounterValueGenerator counter = new CounterValueGenerator(
 						name, null, null, this);
 				counter.resetCount();
 				counters.put(name, counter);
 			}
 		}
 		return (ICounterValueGenerator) counters.get(name);
 	}

 	/**
 	 * @param buffer
 	 */
 	public void dumpDebugInfo(StringBuffer buffer) {
 		if (_cache != null) {
 			buffer.append("cache:\n");
 			buffer.append(_cache.getCssText()).append("\n");
 		}
 		if (_defaultCache != null) {
 			buffer.append("default cache:\n");
 			buffer.append(_defaultCache.getCssText()).append("\n");
 		}

 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.jst.pagedesigner.css2.ICSSStyle#getColSpan()
 	 */
 	public int getColSpan() {
 		int colspan = DOMUtil.getIntAttributeIgnoreCase(getHtmlElement(),
 				"colspan", 1);
 		// if span == 0, means span all col from the current column to end
 		// colume
 		if (colspan < 0) {
 			return 1;
 		}
         return colspan;
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.jst.pagedesigner.css2.ICSSStyle#getRowSpan()
 	 */
 	public int getRowSpan() {
 		int rowspan = DOMUtil.getIntAttributeIgnoreCase(getHtmlElement(),
 				"rowspan", 1);
 		if (rowspan < 0) {
 			return 1;
 		}
         return rowspan;
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.jst.pagedesigner.css2.ICSSStyle#isInSelection()
 	 */
 	public boolean isInSelection() {
 		IRangeSelectionProxy proxy = (IRangeSelectionProxy) getAdapter(IRangeSelectionProxy.class);
 		if (proxy != null) {
 			return proxy.isRangeSelected();
 		}
 		ICSSStyle parentStyle = getParentStyle();
 		if (parentStyle != null) {
 			return parentStyle.isInSelection();
 		}
 		return false;
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.core.runtime.IAdaptable#getAdapter(java.lang.Class)
 	 */
 	public Object getAdapter(Class adapter) {
 		if (this._element instanceof INodeNotifier) {
 			Object ret = ((INodeNotifier) _element).getAdapterFor(adapter);
 			if (ret != null && adapter.isInstance(ret)) {
 				return ret;
 			}
 		}
 		return null;
 	}

 	// private void unregistCounter()
 	// {
 	// if (_counters != null)
 	// {
 	// Collection c = _counters.values();
 	// Iterator iter = c.iterator();
 	// while (iter.hasNext())
 	// {
 	// Counter2 counter = (Counter2) iter.next();
 	// counter.unregist(this);
 	// }
 	// }
 	// }

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.jst.pagedesigner.css2.ICSSStyle#resetCounters()
 	 */
 	public void processCounters() {
 		this._counters = null;
 		CounterHelper.processCounterIncrement(this);
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2006 Sybase, Inc. and others.
	*
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/epl-v10.html
	*
	* Contributors:
	* Sybase, Inc. - initial API and implementation
	*******************************************************************************/
	package org.eclipse.jst.pagedesigner.css2.style;

	import java.util.HashMap;
	import java.util.Map;

	import org.eclipse.draw2d.geometry.Insets;
	import org.eclipse.jst.pagedesigner.IHTMLConstants;
	import org.eclipse.jst.pagedesigner.css2.CSSUtil;
	import org.eclipse.jst.pagedesigner.css2.ICSSStyle;
	import org.eclipse.jst.pagedesigner.css2.font.CSSFontManager;
	import org.eclipse.jst.pagedesigner.css2.font.ICSSFont;
	import org.eclipse.jst.pagedesigner.css2.font.ICSSFontManager;
	import org.eclipse.jst.pagedesigner.css2.list.CounterHelper;
	import org.eclipse.jst.pagedesigner.css2.list.CounterValueGenerator;
	import org.eclipse.jst.pagedesigner.css2.list.ICounterValueGenerator;
	import org.eclipse.jst.pagedesigner.css2.property.CSSMetaRegistry;
	import org.eclipse.jst.pagedesigner.css2.property.ICSSPropertyID;
	import org.eclipse.jst.pagedesigner.css2.property.ICSSPropertyMeta;
	import org.eclipse.jst.pagedesigner.css2.value.Length;
	import org.eclipse.jst.pagedesigner.utils.DOMUtil;
	import org.eclipse.wst.sse.core.internal.provisional.INodeNotifier;
	import org.w3c.dom.Element;
	import org.w3c.dom.Node;
	import org.w3c.dom.css.CSSStyleDeclaration;
	import org.w3c.dom.css.CSSValue;

	/**
	* @author mengbo
	*/
	public class AbstractStyle implements ICSSStyle
	{
	private final Element _element;

	private Map _cachedValues = new HashMap();

	private ICSSFont _font = null;

	private CSSStyleDeclaration _cache;

	private CSSStyleDeclaration _defaultCache;

	private boolean _cssDeclareWasSearched = false;

	private boolean _cssDefaultDeclareWasSearched = false;

	private Insets _borderInsets, _marginInsets, _paddingInsets;

	private ICSSStyle _parentStyle;

	private HashMap _counters = null;

	/**
	* @return the element this style if for
	*/
	public Element getElement() {
	return _element;
	}

	/**
	* @param element
	*/
	public AbstractStyle(Element element) {
	_element = element;
	}

	/**
	* reset all the cache.
	*/
	public void reset() {
	_cachedValues.clear();
	_font = null;
	_cache = null;
	_defaultCache = null;
	_cssDeclareWasSearched = false;
	_cssDefaultDeclareWasSearched = false;
	// if (_counters != null)
	// {
	// unregistCounter();
	// _counters.clear();
	// _counters = null;
	// }
	_borderInsets = _marginInsets = _paddingInsets = null;
	}

	/**
	* this is a hook method so caller can use it to override default
	* calculation. Note, after the call to <code>reset</code>, it will be
	* lost.
	*
	* @param property
	* @param value
	*/
	public void setStyleProperty(String property, Object value) {
	_cachedValues.put(property, value);
	}

	/**
	* get a style property value.
	*
	* @param property
	* @return the style property
	*/
	public Object getStyleProperty(String property) {
	Object value = _cachedValues.get(property);
	if (value == null) {
	value = calculateProperty(property);
	if (value != null) {
	_cachedValues.put(property, value);
	}
	}
	return value;
	}

	/**
	* in this method, should first check the "style" attribute, then combine
	* that with document style.
	*
	* @return the style
	*/
	protected CSSStyleDeclaration calculateDeclaration() {
	String name = getHtmlElement().getAttribute("id");
	if (name == null \|\| name.length() == 0) {
	name = getHtmlElement().getAttribute("name");
	}
	return CSSUtil.getCSSDeclaration(this.getHtmlElement(), name);
	}

	/**
	* @return the style
	*/
	protected CSSStyleDeclaration calculateDefaultDeclaration() {
	return CSSUtil.getDefaultCSSDeclaration(this.getHtmlElement(), null);
	}

	/**
	* @return the style declaration
	*/
	public CSSStyleDeclaration getDeclaration() {
	// FIXME:may need to be change, boolean variable is not a best way.
	if (!_cssDeclareWasSearched) {
	_cache = calculateDeclaration();
	_cssDeclareWasSearched = true;
	}
	return _cache;
	}

	/**
	* @return the default declaration
	*/
	public CSSStyleDeclaration getDefaultDeclaration() {
	// FIXME:may need to be change, boolean variable is not a best way.
	if (!_cssDefaultDeclareWasSearched) {
	_defaultCache = calculateDefaultDeclaration();
	_cssDefaultDeclareWasSearched = true;
	}
	return _defaultCache;
	}

	/* (non-Javadoc)
	* @see org.eclipse.jst.pagedesigner.css2.ICSSStyle#getHTMLelementInitValue(java.lang.String)
	*/
	public Object getHTMLelementInitValue(String propertyName) {
	ICSSPropertyMeta meta = getPropertyMeta(propertyName);
	if (meta != null) {
	Object obj = meta.getHTMLElementInitialValue(_element,
	getHTMLTag(), propertyName);
	if (obj == null) {
	obj = meta.getInitialValue(propertyName, this);
	}
	return obj;
	}
	return ICSSPropertyMeta.NOT_SPECIFIED;
	}

	/**
	* @param propertyName
	* @return the property
	*/
	protected Object calculateProperty(String propertyName) {
	ICSSPropertyMeta meta = getPropertyMeta(propertyName);
	Object result = null;
	// get declaration
	CSSStyleDeclaration decl = getDeclaration();
	CSSValue value = decl == null ? null : decl
	.getPropertyCSSValue(propertyName);
	if (value == null) {
	if (meta != null) {
	result = meta.calculateHTMLAttributeOverride(_element,
	getHTMLTag(), propertyName, this);
	if (result != null) {
	return result;
	}
	}
	decl = getDefaultDeclaration();
	}
	value = decl == null ? null : decl.getPropertyCSSValue(propertyName);

	if (value != null && value.getCssValueType() == CSSValue.CSS_INHERIT) {
	result = getParentResultValue(meta, propertyName);
	} else if (value == null) {
	if (meta != null) {
	result = meta.calculateHTMLAttributeOverride(_element,
	getHTMLTag(), propertyName, this);
	}
	if (result == null) {
	result = calculateLocalOverride(meta, propertyName);
	}
	if (result == null) {
	if (meta == null) {
	result = ICSSPropertyMeta.NOT_SPECIFIED;
	} else {
	if (meta.isInherited()) {
	result = getParentResultValue(meta, propertyName);
	} else {
	result = meta.getInitialValue(propertyName, this);
	}
	}
	}
	} else {
	result = calculateCSSValueResult(meta, value, propertyName);
	}
	return result;
	}

	/**
	* get the corresponding HTML tag for this style. This is for certain HTML
	* tag can also provide style information.
	*
	* @return the html tag
	*/
	protected String getHTMLTag() {
	return _element.getTagName();
	}

	/**
	* @param propertyName
	* @return the property meta for property name
	*/
	protected ICSSPropertyMeta getPropertyMeta(String propertyName) {
	return CSSMetaRegistry.getInstance().getMeta(propertyName);
	}

	/**
	* convert the CSSValue to the property type specified data result.
	*
	* @param meta
	* @param value
	* @param propertyName
	* @return should not return null.
	*/
	protected Object calculateCSSValueResult(ICSSPropertyMeta meta,
	CSSValue value, String propertyName) {
	if (meta == null) {
	return ICSSPropertyMeta.NOT_SPECIFIED;
	}
	return meta.calculateCSSValueResult(value, propertyName, this);
	}

	/**
	* it is possible that some attribute of the element may provide style
	* information. child class should override this method. Also, some element
	* type may have internally build style, such as input-submit may use
	* special border. NOTE: it is very important that in calculateLocalOverride
	* you don't directly or indirectly call getStyleProperty() to avoid
	* deadloop.
	*
	* @param meta
	* @param propertyName
	* @return null means no style information in other attributes. Otherwise
	* return property specific data result -- normally will use meta to
	* convert the attribute.
	*/
	protected Object calculateLocalOverride(ICSSPropertyMeta meta,
	String propertyName) {
	// // do some default margin thing.
	// if (ICSSPropertyID.ATTR_MARGIN_RIGHT.equalsIgnoreCase(propertyName)
	// \|\| ICSSPropertyID.ATTR_MARGIN_BOTTOM.equalsIgnoreCase(propertyName))
	// {
	// return MARGIN_LENGTH;
	// }
	// else if
	// (ICSSPropertyID.ATTR_MARGIN_LEFT.equalsIgnoreCase(propertyName))
	// {
	// // to make a little room, so it is possible for user to position the
	// // mouse before the first element in a block.
	// return MARGIN_LEFT;
	// }
	return null;
	}

	/**
	* This is only called when inherit value from parent.
	*
	* @param meta
	* @param propertyName
	* @return the result value
	*/
	protected Object getParentResultValue(ICSSPropertyMeta meta,
	String propertyName) {
	ICSSStyle style = getParentStyle();
	return style.getStyleProperty(propertyName);
	}

	/**
	* @param parentStyle
	*/
	public void setParentStyle(ICSSStyle parentStyle) {
	this._parentStyle = parentStyle;
	reset();
	}

	public ICSSStyle getParentStyle() {
	if (_parentStyle != null) {
	return _parentStyle;
	}
	Node node = _element.getParentNode();
	while (node instanceof Element && node instanceof INodeNotifier) {
	ICSSStyle parentStyle = (ICSSStyle) ((INodeNotifier) node)
	.getAdapterFor(ICSSStyle.class);
	if (parentStyle != null) {
	return parentStyle;
	}
	node = node.getParentNode();
	}
	return DefaultStyle.getInstance();
	}

	/**
	* Will not return null
	*
	* @return the font
	*/
	public ICSSFont getCSSFont() {
	if (_font == null) {
	_font = getFontManager().createFont(this);
	}
	return _font;
	}

	/**
	* @return
	*/
	private ICSSFontManager getFontManager() {
	return CSSFontManager.getInstance();
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.jst.pagedesigner.css2.ICSSStyle#dispose()
	*/
	public void dispose() {
	// TODO: anything to dispose?
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.jst.pagedesigner.css2.ICSSStyle#getMarginInsets()
	*/
	public Insets getMarginInsets() {
	if (_marginInsets == null) {
	int top = getInsetProperty(ICSSPropertyID.ATTR_MARGIN_TOP);
	int left = getInsetProperty(ICSSPropertyID.ATTR_MARGIN_LEFT);
	int bottom = getInsetProperty(ICSSPropertyID.ATTR_MARGIN_BOTTOM);
	int right = getInsetProperty(ICSSPropertyID.ATTR_MARGIN_RIGHT);
	_marginInsets = new Insets(top, left, bottom, right);
	}
	return _marginInsets;
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.jst.pagedesigner.css2.ICSSStyle#getPaddingInsets()
	*/
	public Insets getPaddingInsets() {
	if (_paddingInsets == null) {
	int top = getInsetProperty(ICSSPropertyID.ATTR_PADDING_TOP)+ARTIFICIAL_BORDER_OFFSET;
	int left = getInsetProperty(ICSSPropertyID.ATTR_PADDING_LEFT)+ARTIFICIAL_BORDER_OFFSET;
	int bottom = getInsetProperty(ICSSPropertyID.ATTR_PADDING_BOTTOM)+ARTIFICIAL_BORDER_OFFSET;
	int right = getInsetProperty(ICSSPropertyID.ATTR_PADDING_RIGHT)+ARTIFICIAL_BORDER_OFFSET;
	_paddingInsets = new Insets(top, left, bottom, right);
	}
	return _paddingInsets;
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.jst.pagedesigner.css2.ICSSStyle#getBorderInsets()
	*/
	public Insets getBorderInsets() {
	if (_borderInsets == null) {
	int top = getInsetProperty(ICSSPropertyID.ATTR_BORDER_TOP_WIDTH);
	int left = getInsetProperty(ICSSPropertyID.ATTR_BORDER_LEFT_WIDTH);
	int bottom = getInsetProperty(ICSSPropertyID.ATTR_BORDER_BOTTOM_WIDTH);
	int right = getInsetProperty(ICSSPropertyID.ATTR_BORDER_RIGHT_WIDTH);
	_borderInsets = new Insets(top, left, bottom, right);
	}
	return _borderInsets;
	}

	/**
	* @param border_top_width
	* @return
	*/
	private int getInsetProperty(String propertyName) {
	Object obj = this.getStyleProperty(propertyName);
	if (obj instanceof Length) {
	Length l = (Length) obj;
	if (l.isPercentage()) {
	return 0; // FIXME:
	}
	return l.getValue();
	}

	return 0;
	}

	public boolean isAdapterForType(Object type) {
	return (type == ICSSStyle.class);
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.jst.pagedesigner.css2.ICSSStyle#isSizeIncludeBorderPadding()
	*/
	public boolean isSizeIncludeBorderPadding() {
	String display = this.getDisplay();
	if ("table-cell".equalsIgnoreCase(display)) {
	return false;
	}
	String tag = this.getHTMLTag();
	if ("img".equalsIgnoreCase(tag)) {
	return false;
	}
	return true;
	}

	/*
	* (non-Javadoc)
	*
	* @see com.ibm.sse.model.INodeAdapter#notifyChanged(com.ibm.sse.model.INodeNotifier,
	* int, java.lang.Object, java.lang.Object, java.lang.Object, int)
	*/
	public void notifyChanged(INodeNotifier notifier, int eventType,
	Object changedFeature, Object oldValue, Object newValue, int pos) {
	// do nothing
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.jst.pagedesigner.css2.ICSSStyle#getBackgroundColor()
	*/
	public Object getColor() {
	Object _color = null;
	if (_color == null) {
	_color = getStyleProperty(ICSSPropertyID.ATTR_COLOR);
	if (_color == null) {
	_color = getStyleProperty(ICSSPropertyID.ATTR_TEXTCOLOR);
	}
	}
	return _color;
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.jst.pagedesigner.css2.ICSSStyle#getColor()
	*/
	public Object getBackgroundColor() {
	Object _backgroundColor = null;
	if (_backgroundColor == null) {
	_backgroundColor = getStyleProperty(ICSSPropertyID.ATTR_BACKGROUND_COLOR);
	}
	return _backgroundColor;
	}

	/**
	* @return the html element
	*/
	public Element getHtmlElement() {
	// if (_element instanceof IDOMElement)
	// {
	// EditPart part = (EditPart) ((IDOMElement)
	// _element).getAdapterFor(EditPart.class);
	// if (part instanceof ElementEditPart)
	// {
	// ElementEditPart elementPart = (ElementEditPart) part;
	// ITagHandler h = elementPart.getTagHandler();
	// if (h != null)
	// {
	// return h.mapCustomElement(_element);
	// }
	// }
	//
	// }
	return _element;
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.jst.pagedesigner.css2.ICSSStyle#getDisplay()
	*/
	public String getDisplay() {
	Object display = this.getStyleProperty(ICSSPropertyID.ATTR_DISPLAY);
	String displayStr;
	if (display == null) {
	displayStr = ICSSPropertyID.VAL_INLINE;
	} else if (display instanceof String) {
	displayStr = (String) display;
	} else {
	displayStr = display.toString();
	}
	if (ICSSPropertyID.VAL_INLINE.equalsIgnoreCase(displayStr)
	&& IHTMLConstants.TAG_TABLE.equalsIgnoreCase(getHTMLTag())) {
	return ICSSPropertyID.VAL_INLINE_TABLE;
	}
	if (ICSSPropertyID.VAL_INLINE.equalsIgnoreCase(displayStr)) {
	Object width = this.getStyleProperty(ICSSPropertyID.ATTR_WIDTH);
	if (width instanceof Length) {
	return ICSSPropertyID.VAL_INLINE_BLOCK;
	}
	Object height = this.getStyleProperty(ICSSPropertyID.ATTR_HEIGHT);
	if (height instanceof Length) {
	return ICSSPropertyID.VAL_INLINE_BLOCK;
	}
	return displayStr;
	}
	return displayStr;
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.jst.pagedesigner.css2.ICSSStyle#getListStyle()
	*/
	public Map getCounters() {
	if (_counters == null) {
	_counters = new HashMap();
	CounterHelper.processCounterReset(this, _counters);
	}
	return _counters;
	}

	/**
	* Get named counter from counters.
	*
	* see org.eclipse.jst.pagedesigner.css2.ICSSStyle#getCounter(java.lang.String)
	*/
	public ICounterValueGenerator findCounter(String name, boolean must) {
	Map counters = getCounters();
	if (counters == null \|\| !counters.containsKey(name)) {
	if (getParentStyle() != null
	&& !(getParentStyle() instanceof DefaultStyle)) {
	// ensure it is registered somewhere.
	return getParentStyle().findCounter(name, must);
	}
	// must is called by counter-increment
	else if (must) {
	// the caller should do the other setting.
	ICounterValueGenerator counter = new CounterValueGenerator(
	name, null, null, this);
	counter.resetCount();
	counters.put(name, counter);
	}
	}
	return (ICounterValueGenerator) counters.get(name);
	}

	/**
	* @param buffer
	*/
	public void dumpDebugInfo(StringBuffer buffer) {
	if (_cache != null) {
	buffer.append("cache:\n");
	buffer.append(_cache.getCssText()).append("\n");
	}
	if (_defaultCache != null) {
	buffer.append("default cache:\n");
	buffer.append(_defaultCache.getCssText()).append("\n");
	}

	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.jst.pagedesigner.css2.ICSSStyle#getColSpan()
	*/
	public int getColSpan() {
	int colspan = DOMUtil.getIntAttributeIgnoreCase(getHtmlElement(),
	"colspan", 1);
	// if span == 0, means span all col from the current column to end
	// colume
	if (colspan < 0) {
	return 1;
	}
	return colspan;
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.jst.pagedesigner.css2.ICSSStyle#getRowSpan()
	*/
	public int getRowSpan() {
	int rowspan = DOMUtil.getIntAttributeIgnoreCase(getHtmlElement(),
	"rowspan", 1);
	if (rowspan < 0) {
	return 1;
	}
	return rowspan;
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.jst.pagedesigner.css2.ICSSStyle#isInSelection()
	*/
	public boolean isInSelection() {
	IRangeSelectionProxy proxy = (IRangeSelectionProxy) getAdapter(IRangeSelectionProxy.class);
	if (proxy != null) {
	return proxy.isRangeSelected();
	}
	ICSSStyle parentStyle = getParentStyle();
	if (parentStyle != null) {
	return parentStyle.isInSelection();
	}
	return false;
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.core.runtime.IAdaptable#getAdapter(java.lang.Class)
	*/
	public Object getAdapter(Class adapter) {
	if (this._element instanceof INodeNotifier) {
	Object ret = ((INodeNotifier) _element).getAdapterFor(adapter);
	if (ret != null && adapter.isInstance(ret)) {
	return ret;
	}
	}
	return null;
	}

	// private void unregistCounter()
	// {
	// if (_counters != null)
	// {
	// Collection c = _counters.values();
	// Iterator iter = c.iterator();
	// while (iter.hasNext())
	// {
	// Counter2 counter = (Counter2) iter.next();
	// counter.unregist(this);
	// }
	// }
	// }

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.jst.pagedesigner.css2.ICSSStyle#resetCounters()
	*/
	public void processCounters() {
	this._counters = null;
	CounterHelper.processCounterIncrement(this);
	}
	}