Bug 146352 support cancel execution for "view report ..." tool bar and menu actions.
Current "view report as HTML" and "view report as PDF" in the menu tool bar uses RunAndRender task to stream back the report output. As a result, total page count is not available when the report is being streamed back. Please change these two requests to use Run task and then render task to generate HTML or PDF, so that the total page count is calculate. preview tab could continue to use RunAndRender task, since it is for preview.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/service/ReportEngineService.java
{
			option.setEmbeddable( embeddable.booleanValue( ) );
		}
		if ( activeIds != null )
		{
			option.setInstanceIDs( activeIds );
		}
		IRunAndRenderTask runAndRenderTask = null;
		runAndRenderTask = engine.createRunAndRenderTask( runnable );
		runAndRenderTask.setLocale( locale );
		if ( parameters != null )
		{
			runAndRenderTask.setParameterValues( parameters );
		}
		
		if ( displayTexts != null )
		{
			Iterator keys = displayTexts.keySet( ).iterator( );
			while ( keys.hasNext( ) )
			{
				String paramName = DataUtil.getString( keys.next( ) );
				String displayText = DataUtil.getString( displayTexts
						.get( paramName ) );
				runAndRenderTask.setParameterDisplayText( paramName,
						displayText );
			}
		}
		runAndRenderTask.setRenderOption( option );
		HashMap context = new HashMap( );