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/*******************************************************************************
 * Copyright (c) 2004, 2006 IBM Corporation 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.ui.tests.performance.layout;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.jface.util.Geometry;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.ui.WorkbenchException;
import org.eclipse.ui.tests.performance.BasicPerformanceTest;

/**
 * Measures the time required to layout the widget 10 times. Does not include
 * the time required for any deferred repaints.
 * 
 * @since 3.1
 */
public class LayoutTest extends BasicPerformanceTest {

  private TestWidgetFactory widgetFactory;

  private int xIterations = 100;

  private int yIterations = 10;

  private boolean flushState;

  /**
   * @param testName
   */
  public LayoutTest(TestWidgetFactory widgetFactory, boolean flushState) {
    super(widgetFactory.getName() + " layout("
        + (flushState ? "true" : "false") + ")");

    this.widgetFactory = widgetFactory;
    this.flushState = flushState;
  }

  /**
   * Run the test
   */
  protected void runTest() throws CoreException, WorkbenchException {

    widgetFactory.init();
    final Composite widget = widgetFactory.getControl();
    final Point maxSize = widgetFactory.getMaxSize();
    Rectangle initialBounds = widget.getBounds();
    final Rectangle newBounds = Geometry.copy(initialBounds);

    // This test is different now duw to trim API changes so 'gray' it...
         setDegradationComment("<a href=https://bugs.eclipse.org/bugs/show_bug.cgi?id=129001>See Bug 129001</a> ");
    
    for (int xIteration = 0; xIteration < xIterations; xIteration++) {

      processEvents();

      startMeasuring();

      for (int yIteration = 0; yIteration < yIterations; yIteration++) {
        // Avoid giving the same x value twice in a row in order to make
        // it hard to cache
        int xSize = maxSize.x
            * ((xIteration + yIteration) % xIterations)
            / xIterations;
        int ySize = maxSize.y * yIteration / yIterations;

        newBounds.width = xSize;
        newBounds.height = ySize;

        widget.setBounds(newBounds);
        widget.layout(flushState);
      }

      stopMeasuring();
    }

    commitMeasurements();
    assertPerformance();

    widget.setBounds(initialBounds);
    widgetFactory.done();
  }
}

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