DefaultPresentationRenderer.java

/*******************************************************************************
 * Copyright (c) 2012-2017 Codenvy, S.A.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *   Codenvy, S.A. - initial API and implementation
 *******************************************************************************/
package org.eclipse.che.ide.ui.smartTree.presentation;

import com.google.common.base.Strings;
import com.google.gwt.dom.client.DivElement;
import com.google.gwt.dom.client.Document;
import com.google.gwt.dom.client.Element;
import com.google.gwt.dom.client.Style;

import org.eclipse.che.ide.api.data.tree.Node;
import org.eclipse.che.ide.ui.smartTree.Tree;
import org.eclipse.che.ide.ui.smartTree.TreeStyles;

/**
 * @author Vlad Zhukovskiy
 */
public class DefaultPresentationRenderer<N extends Node> extends AbstractPresentationRenderer<N> {

    public DefaultPresentationRenderer(TreeStyles treeStyles) {
        super(treeStyles);
    }

    @Override
    public Element render(N node, String domID, Tree.Joint joint, int depth) {
        NodePresentation presentation;
        if (node instanceof HasPresentation) {
            presentation = ((HasPresentation)node).getPresentation(false);
        } else {
            presentation = new NodePresentation();
            presentation.setPresentableText(node.getName());
        }

        Element rootContainer = getRootContainer(domID);

        Element nodeContainer = getNodeContainer();

        setIndentLevel(nodeContainer, depth);

        Element jointContainer = getJointContainer(joint);

        Element iconContainer = getIconContainer(presentation.getPresentableIcon());

        Element userElement = getUserElement(presentation.getUserElement());

        Element presentableTextContainer = getPresentableTextContainer(createPresentableTextElement(presentation));

        Element infoTextContainer = getInfoTextContainer(createInfoTextElement(presentation));

        Element descendantsContainer = getDescendantsContainer();

        nodeContainer.appendChild(jointContainer);
        nodeContainer.appendChild(iconContainer);
        nodeContainer.appendChild(userElement == null ? Document.get().createSpanElement() : userElement);
        nodeContainer.appendChild(presentableTextContainer);
        nodeContainer.appendChild(infoTextContainer);

        rootContainer.appendChild(nodeContainer);
        rootContainer.appendChild(descendantsContainer);

        return rootContainer;
    }

    private Element createPresentableTextElement(NodePresentation presentation) {
        DivElement textElement = Document.get().createDivElement();

        textElement.setInnerText(Strings.nullToEmpty(presentation.getPresentableText()));
        textElement.setAttribute("style", presentation.getPresentableTextCss());

        //TODO support text colorization

        return textElement;
    }

    private Element createInfoTextElement(NodePresentation presentation) {
        DivElement textElement = Document.get().createDivElement();

        StringBuilder sb = new StringBuilder();

        if (presentation.getInfoTextWrapper() != null) {
            sb.append(presentation.getInfoTextWrapper().first);
        }

        if (!Strings.isNullOrEmpty(presentation.getInfoText())) {
            sb.append(presentation.getInfoText());
        }

        if (presentation.getInfoTextWrapper() != null) {
            sb.append(presentation.getInfoTextWrapper().second);
        }

        textElement.setInnerText(sb.toString());
        textElement.setAttribute("style", presentation.getInfoTextCss());

        //TODO support text colorization

        return textElement;
    }

    private void setIndentLevel(Element element, int depth) {
        element.getStyle().setPaddingLeft((double)depth * 16, Style.Unit.PX);
    }
}