org.dominokit.domino.ui.popover.PopupPositionBestFit Maven / Gradle / Ivy
/*
* 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.popover;
import elemental2.dom.DOMRect;
import elemental2.dom.DomGlobal;
import elemental2.dom.HTMLElement;
/**
* Position the popover on the better position based on the target element location in the screen.
*
* I.e. if the popover will exceed the window from the bottom, then it will be better to show it
* on the top
*/
public class PopupPositionBestFit implements PopupPosition {
private String positionClass;
/** {@inheritDoc} */
@Override
public void position(HTMLElement popup, HTMLElement target) {
DOMRect targetRect = target.getBoundingClientRect();
double bottom = targetRect.bottom + popup.getBoundingClientRect().height;
double right = targetRect.right + popup.getBoundingClientRect().height;
int innerHeight = DomGlobal.window.innerHeight;
if (bottom < innerHeight) {
position(popup, target, BOTTOM);
} else if (popup.getBoundingClientRect().height < targetRect.top) {
position(popup, target, TOP);
} else if (popup.getBoundingClientRect().width < targetRect.left) {
position(popup, target, LEFT);
} else if (right < DomGlobal.window.innerWidth) {
position(popup, target, RIGHT);
} else {
position(popup, target, BOTTOM);
}
}
protected void position(HTMLElement popup, HTMLElement target, PopupPosition popupPosition) {
popupPosition.position(popup, target);
this.positionClass = popupPosition.getDirectionClass();
}
/** {@inheritDoc} */
@Override
public String getDirectionClass() {
return positionClass;
}
}