org.dominokit.domino.ui.collapsible.AnimationCollapseStrategy Maven / Gradle / Ivy

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/*
 * Copyright © 2019 Dominokit
 *
 * 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.
 */
package org.dominokit.domino.ui.collapsible;

import static java.util.Objects.nonNull;
import static org.dominokit.domino.ui.style.DisplayCss.dui_hidden;
import static org.dominokit.domino.ui.utils.Domino.*;
import static org.dominokit.domino.ui.utils.ElementsFactory.elements;

import elemental2.dom.Element;
import java.util.Optional;
import org.dominokit.domino.ui.animations.Animation;
import org.dominokit.domino.ui.animations.Transition;

/**
 * An implementation of {@link org.dominokit.domino.ui.collapsible.CollapseStrategy} that uses the
 * css animations to hide/show the collapsible element
 */
public class AnimationCollapseStrategy implements CollapseStrategy {

  private final AnimationCollapseOptions options;
  private Animation hideAnimation;
  private boolean showing = false;
  private boolean hiding = false;
  private CollapsibleHandlers handlers;
  private Animation showAnimation;

  /** @dominokit-site-ignore {@inheritDoc} */
  @Override
  public void init(Element element, CollapsibleHandlers handlers) {
    this.handlers = handlers;
  }

  /**
   * Creates an AnimationCollapseStrategy with the provided transitions and duration
   *
   * @param showTransition The show/expand animation {@link
   *     org.dominokit.domino.ui.animations.Transition}
   * @param hideTransition The hide/collapse animation {@link
   *     org.dominokit.domino.ui.animations.Transition}
   * @param duration The {@link CollapsibleDuration} to be used for both the show and hide
   *     animations.
   */
  public AnimationCollapseStrategy(
      Transition showTransition, Transition hideTransition, CollapsibleDuration duration) {
    this.options =
        new AnimationCollapseOptions()
            .setShowTransition(showTransition)
            .setHideTransition(hideTransition)
            .setShowDuration(duration)
            .setHideDuration(duration);
  }

  /**
   * Creates an AnimationCollapseStrategy with the provided transitions and duration
   *
   * @param transition The show/expand and hide/collapse animation {@link
   *     org.dominokit.domino.ui.animations.Transition}
   * @param duration The {@link CollapsibleDuration} to be used for both the show and hide
   *     animations.
   */
  public AnimationCollapseStrategy(Transition transition, CollapsibleDuration duration) {
    this.options =
        new AnimationCollapseOptions()
            .setShowTransition(transition)
            .setHideTransition(transition)
            .setShowDuration(duration)
            .setHideDuration(duration);
  }

  /**
   * Creates an AnimationCollapseStrategy from the provided AnimationCollapseOptions
   *
   * @param options The {@link org.dominokit.domino.ui.collapsible.AnimationCollapseOptions} to
   *     configure the strategy
   */
  public AnimationCollapseStrategy(AnimationCollapseOptions options) {
    this.options = options;
  }

  /** @dominokit-site-ignore {@inheritDoc} */
  @Override
  public void expand(Element element) {
    if (!showing) {
      elements.elementOf(element).removeCss(this.options.getShowDuration().getStyle());
      elements.elementOf(element).removeCss(this.options.getHideDuration().getStyle());
      showAnimation =
          Animation.create(element)
              .duration(this.options.getShowDuration().getDuration())
              .transition(this.options.getShowTransition())
              .delay(this.options.getShowDelay())
              .beforeStart(
                  theElement -> {
                    showing = true;
                    if (nonNull(hideAnimation)) {
                      hideAnimation.stop(true);
                      hideAnimation = null;
                      hiding = false;
                    }
                    elements
                        .elementOf(element)
                        .removeCss(dui_hidden)
                        .removeAttribute(Collapsible.DUI_COLLAPSED);
                  })
              .callback(
                  e -> {
                    showing = false;
                    this.handlers.onExpandCompleted().run();
                  })
              .animate();
    }
  }

  /** @dominokit-site-ignore {@inheritDoc} */
  @Override
  public void collapse(Element element) {
    Optional.ofNullable(showAnimation).ifPresent(animation -> animation.stop(false));
    if (!hiding) {
      elements.elementOf(element).removeCss(this.options.getShowDuration().getStyle());
      elements.elementOf(element).removeCss(this.options.getHideDuration().getStyle());
      hideAnimation =
          Animation.create(element)
              .duration(this.options.getHideDuration().getDuration())
              .transition(this.options.getHideTransition())
              .beforeStart(
                  element1 -> {
                    hiding = true;
                    this.handlers.onBeforeCollapse().run();
                  })
              .callback(
                  theElement -> {
                    elements
                        .elementOf(element)
                        .addCss(dui_hidden)
                        .setAttribute(Collapsible.DUI_COLLAPSED, "true");
                    hiding = false;
                    this.handlers.onCollapseCompleted().run();
                  })
              .animate();
    }
  }
}