Bug 199834 Enable access to IContent object in IReportItemPresentation layer
In IReportItemPresentation layer, the extended item may want to access properties from current IContent object, for example, bookmark, content style. So we need expose the content object in this layer.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/extension/ReportItemPresentationBase.java
* (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.engine.extension.IReportItemPresentation#onRowSets(org.eclipse.birt.report.engine.extension.IRowSet[])
	 */
	public Object onRowSets( IRowSet[] rowSets ) throws BirtException
	{
		return null;
	}
	/**
	 * @return the image MIME type (e.g. "image/svg+xml")
	 */
	public String getImageMIMEType( )
	{
		return ""; 
	}
	/* (non-Javadoc)
	 * @see org.eclipse.birt.report.engine.extension.IReportItemPresentation#setActionHandler(org.eclipse.birt.report.engine.api.IHTMLActionHandler)
	 */
	public void setActionHandler(IHTMLActionHandler ah) {
		this.ah = ah;
	}
	/* (non-Javadoc)
	 * @see org.eclipse.birt.report.engine.extension.IReportItemPresentation#setDynamicStyle(org.eclipse.birt.report.engine.content.IStyle)
	 */
	public void setDynamicStyle( IStyle style )
	{
		this.style = style;
	}
}