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Fluent interface for functional GUI testing
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/**
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
 * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations under the License.
 *
 * Copyright 2012-2015 the original author or authors.
 */
package org.assertj.swing.driver;

import static java.awt.Frame.ICONIFIED;
import static java.awt.Frame.MAXIMIZED_BOTH;
import static java.awt.Frame.NORMAL;
import static org.assertj.core.util.Preconditions.checkNotNull;
import static org.assertj.swing.driver.ComponentPreconditions.checkEnabledAndShowing;
import static org.assertj.swing.driver.WindowLikeContainers.iconifyButtonLocation;
import static org.assertj.swing.driver.WindowLikeContainers.maximizeButtonLocation;
import static org.assertj.swing.edt.GuiActionRunner.execute;
import static org.assertj.swing.exception.ActionFailedException.actionFailure;

import java.awt.Frame;
import java.awt.Point;
import java.awt.Toolkit;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;

import org.assertj.swing.annotation.RunsInEDT;
import org.assertj.swing.annotation.ThreadSafeAction;
import org.assertj.swing.core.Robot;
import org.assertj.swing.edt.GuiQuery;
import org.assertj.swing.internal.annotation.InternalApi;
import org.assertj.swing.util.ToolkitProvider;

/**
 * 
 * Supports functional testing of AWT or Swing {@code Frame}s.
 * 
 *
 * 
 * Note: This class is intended for internal use only. Please use the classes in the package
 * {@link org.assertj.swing.fixture} in your tests.
 * 
 *
 * @author Alex Ruiz
 * @author Yvonne Wang
 */
@InternalApi
public class FrameDriver extends WindowDriver {
  /**
   * Creates a new {@link FrameDriver}.
   *
   * @param robot the robot to use to simulate user input.
   */
  public FrameDriver(@Nonnull Robot robot) {
    super(robot);
  }

  /**
   * Iconifies the given AWT or Swing {@code Frame}.
   *
   * @param frame the given {@code Frame}.
   * @throws IllegalStateException if the {@code Frame} is not enabled.
   * @throws IllegalStateException if the {@code Frame} is not showing on the screen.
   */
  @RunsInEDT
  public void iconify(@Nonnull Frame frame) {
    moveMouseIgnoringAnyError(frame, iconifyInfo(frame));
    robot.waitForIdle();
    updateFrameExtendedState(frame, ICONIFIED);
  }

  @RunsInEDT
  private static Point iconifyInfo(final @Nonnull Frame frame) {
    return execute(new GuiQuery() {
      @Override
      protected Point executeInEDT() {
        checkEnabledAndShowing(frame);
        return iconifyButtonLocation(frame);
      }
    });
  }

  /**
   * Deiconifies the given AWT or Swing {@code Frame}.
   *
   * @param frame the given {@code Frame}.
   * @throws IllegalStateException if the {@code Frame} is not enabled.
   * @throws IllegalStateException if the {@code Frame} is not showing on the screen.
   */
  @RunsInEDT
  public void deiconify(@Nonnull Frame frame) {
    checkInEdtEnabledAndShowing(frame);
    updateFrameExtendedState(frame, NORMAL);
  }

  /**
   * Normalizes the given AWT or Swing {@code Frame}.
   *
   * @param frame the given {@code Frame}.
   * @throws IllegalStateException if the {@code Frame} is not enabled.
   * @throws IllegalStateException if the {@code Frame} is not showing on the screen.
   */
  @RunsInEDT
  public void normalize(@Nonnull Frame frame) {
    checkInEdtEnabledAndShowing(frame);
    updateFrameExtendedState(frame, NORMAL);
  }

  /**
   * Makes the AWT or Swing {@code Frame} full size.
   *
   * @param frame the target {@code Frame}.
   * @throws IllegalStateException if the {@code Frame} is not enabled.
   * @throws IllegalStateException if the {@code Frame} is not showing on the screen.
   * @throws org.assertj.swing.exception.ActionFailedException if the operating system does not support maximizing
   *           frames.
   */
  @RunsInEDT
  public void maximize(@Nonnull Frame frame) {
    moveMouseIgnoringAnyError(frame, maximizeInfo(frame));
    if (!supportsMaximize(ToolkitProvider.instance().defaultToolkit())) {
      throw actionFailure("Platform does not support maximizing frames");
    }
    updateFrameExtendedState(frame, MAXIMIZED_BOTH);
  }

  @RunsInEDT
  private @Nonnull static Point maximizeInfo(final @Nonnull Frame frame) {
    Point result = execute(new GuiQuery() {
      @Override
      protected @Nullable Point executeInEDT() {
        checkEnabledAndShowing(frame);
        return maximizeButtonLocation(frame);
      }
    });
    return checkNotNull(result);
  }

  @ThreadSafeAction
  private void updateFrameExtendedState(@Nonnull Frame frame, int state) {
    frame.setExtendedState(state);
    robot.waitForIdle();
  }

  private static boolean supportsMaximize(@Nonnull Toolkit toolkit) {
    return toolkit.isFrameStateSupported(MAXIMIZED_BOTH);
  }
}