melnorme.lang.ide.ui.editor.hover.BrowserControlCreator.java Source code

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Here is the source code for melnorme.lang.ide.ui.editor.hover.BrowserControlCreator.java

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/*******************************************************************************
 * Copyright (c) 2015 Bruno Medeiros and other Contributors.
 * 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:
 *     Bruno Medeiros - initial API and implementation
 *******************************************************************************/
package melnorme.lang.ide.ui.editor.hover;

import static melnorme.utilbox.core.Assert.AssertNamespace.assertNotNull;

import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.text.AbstractReusableInformationControlCreator;
import org.eclipse.jface.text.DefaultInformationControl;
import org.eclipse.jface.text.IInformationControl;
import org.eclipse.jface.text.IInformationControlCreator;
import org.eclipse.jface.text.IInformationControlExtension4;
import org.eclipse.swt.widgets.Shell;

import melnorme.lang.tooling.utils.HTMLHelper;
import melnorme.utilbox.misc.MiscUtil;

@SuppressWarnings("restriction")
public class BrowserControlCreator extends AbstractReusableInformationControlCreator {

    protected final String statusFieldText;

    public BrowserControlCreator() {
        this(null);
    }

    public BrowserControlCreator(String statusFieldText) {
        this.statusFieldText = statusFieldText;
    }

    @Override
    public IInformationControl doCreateInformationControl(Shell parent) {
        if (!org.eclipse.jface.internal.text.html.BrowserInformationControl.isAvailable(parent)) {
            return new DefaultInformationControl(parent, true);
        } else {
            return doCreateBrowserInformationControl(parent, JFaceResources.DIALOG_FONT);
        }
    }

    protected IInformationControl doCreateBrowserInformationControl(Shell parent, String font) {
        if (statusFieldText == null) {
            return new org.eclipse.jface.internal.text.html.BrowserInformationControl(parent, font, true);
        } else {
            return new org.eclipse.jface.internal.text.html.BrowserInformationControl(parent, font,
                    statusFieldText) {
                @Override
                public IInformationControlCreator getInformationPresenterControlCreator() {
                    return getEnrichedInformationPresenterControlCreator();
                }
            };
        }
    }

    public IInformationControlCreator getEnrichedInformationPresenterControlCreator() {
        return null;
    }

    public static class EnrichableBrowserControlCreator extends BrowserControlCreator {

        protected final IInformationControlCreator enrichedInformationControlCreator;

        public EnrichableBrowserControlCreator(IInformationControlCreator enrichedInformationControlCreator,
                String statusFieldText) {
            super(statusFieldText);
            assertNotNull(statusFieldText);
            this.enrichedInformationControlCreator = enrichedInformationControlCreator;
        }

        @Override
        public IInformationControlCreator getEnrichedInformationPresenterControlCreator() {
            return enrichedInformationControlCreator;
        }

        @Override
        public boolean canReuse(IInformationControl control) {
            if (!super.canReuse(control))
                return false;

            if (control instanceof IInformationControlExtension4) {
                ((IInformationControlExtension4) control).setStatusText(statusFieldText);
            }

            return true;
        }

    }

    /* -----------------  ----------------- */

    public static String DEFAULT_CSS = MiscUtil.getClassResource(BrowserControlCreator.class,
            "defaultHoverStyle.css");

    public static String wrapHTMLBody(String content) {
        return new HTMLHelper().wrapHTMLBody(content, DEFAULT_CSS);
    }

}