org.dominokit.domino.ui.dropdown.PositionMouseTopLeft 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.dropdown;

import static org.dominokit.domino.ui.style.Unit.px;

import elemental2.dom.DOMRect;
import elemental2.dom.HTMLElement;
import elemental2.dom.MouseEvent;

/** Positions the menu on the top left of the mouse click location */
public class PositionMouseTopLeft implements DropDownPosition {

  private final MouseEvent mouseEvent;

  public PositionMouseTopLeft(MouseEvent mouseEvent) {
    this.mouseEvent = mouseEvent;
  }

  /** {@inheritDoc} */
  @Override
  public void position(HTMLElement actionsMenu, HTMLElement target) {
    DOMRect actionsRect = actionsMenu.getBoundingClientRect();

    actionsMenu.style.setProperty("top", px.of(mouseEvent.clientY - actionsRect.height));
    actionsMenu.style.setProperty("left", px.of(mouseEvent.clientX - actionsRect.width));
  }
}