jetbrains.jetpad.cell.toDom.DomPopupManager.java Source code

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Here is the source code for jetbrains.jetpad.cell.toDom.DomPopupManager.java

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/*
 * Copyright 2012-2016 JetBrains s.r.o
 *
 * 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 jetbrains.jetpad.cell.toDom;

import com.google.gwt.dom.client.Element;
import com.google.gwt.dom.client.Style;
import com.google.gwt.user.client.Timer;
import jetbrains.jetpad.base.Registration;
import jetbrains.jetpad.cell.Cell;
import jetbrains.jetpad.cell.mappersUtil.BasePopupManager;
import jetbrains.jetpad.cell.mappersUtil.PopupPositionUpdater;
import jetbrains.jetpad.mapper.Mapper;

import java.util.HashMap;
import java.util.Map;

import static jetbrains.jetpad.cell.toDom.CellContainerToDomMapper.CSS;

abstract class DomPopupManager extends BasePopupManager<Element> {
    private static final int POPUPS_REFRESH_MILLIS = 50;
    private CellToDomContext myContext;
    private Map<Element, Registration> myRegistrations = null;

    DomPopupManager(CellToDomContext context) {
        myContext = context;
    }

    @Override
    protected Mapper<? extends Cell, ? extends Element> attachPopup(Cell popup) {
        BaseCellMapper<?> mapper = myContext.apply(popup);
        if (mapper == null) {
            throw new IllegalStateException("Can't create a mapper for " + popup);
        }
        Element element = mapper.getTarget();
        myContext.rootElement.appendChild(element);
        element.addClassName(CSS.popup());
        element.getStyle().setPosition(Style.Position.ABSOLUTE);
        element.getStyle().setZIndex(100);
        if (myRegistrations == null) {
            myRegistrations = new HashMap<>();
        }
        myRegistrations.put(element, Tooltip.applyDecoration(mapper));
        return mapper;
    }

    @Override
    protected void detachPopup(Mapper<? extends Cell, ? extends Element> popupMapper) {
        popupMapper.getTarget().removeFromParent();
        myRegistrations.remove(popupMapper.getTarget()).remove();
        if (myRegistrations.isEmpty()) {
            myRegistrations = null;
        }
    }

    @Override
    protected Registration setPopupUpdate() {
        final Timer timer = new Timer() {
            @Override
            public void run() {
                updatePopupPositions();
            }
        };
        timer.scheduleRepeating(POPUPS_REFRESH_MILLIS);
        return new Registration() {
            @Override
            protected void doRemove() {
                timer.cancel();
            }
        };
    }

    @Override
    protected PopupPositionUpdater<Element> getPositionUpdater(
            Mapper<? extends Cell, ? extends Element> popupMapper) {
        return new PopupPositioner(myContext);
    }
}