001/*
002 * #%L
003 * GwtMaterial
004 * %%
005 * Copyright (C) 2015 - 2017 GwtMaterialDesign
006 * %%
007 * Licensed under the Apache License, Version 2.0 (the "License");
008 * you may not use this file except in compliance with the License.
009 * You may obtain a copy of the License at
010 * 
011 *      http://www.apache.org/licenses/LICENSE-2.0
012 * 
013 * Unless required by applicable law or agreed to in writing, software
014 * distributed under the License is distributed on an "AS IS" BASIS,
015 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
016 * See the License for the specific language governing permissions and
017 * limitations under the License.
018 * #L%
019 */
020package gwt.material.design.client.base.viewport;
021
022/**
023 * View Port Fallback.
024 * <br><br>
025 * Return true to continue propagating view port detection, false to break.
026 * <br><br>
027 * Note that if {@link ViewPortHandler#propagateFallback(boolean)} is not true,
028 * this will only be called if no {@link Resolution} matches are made.
029 * Otherwise the fallback is called upon every failed {@link Resolution} match
030 * and can be propagated (or not propagated) with its call result.
031 *
032 * @author Ben
033 */
034public interface ViewPortFallback {
035
036    /**
037     * Fallback call.
038     *
039     * @param viewPort the view port that wasn't detected.
040     * @return true to continue propagating view port detection, false to break.
041     */
042    boolean call(ViewPortRect viewPort);
043}