com.google.gdt.eclipse.designer.util.ui.HtmlSelectionDialog.java Source code

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Here is the source code for com.google.gdt.eclipse.designer.util.ui.HtmlSelectionDialog.java

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/*******************************************************************************
 * Copyright 2011 Google Inc. All Rights Reserved.
 *
 * 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
 *
 * 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 com.google.gdt.eclipse.designer.util.ui;

import com.google.gdt.eclipse.designer.util.ModuleDescription;
import com.google.gdt.eclipse.designer.util.resources.IResourcesProvider;

import org.eclipse.wb.internal.core.utils.ui.GridDataFactory;
import org.eclipse.wb.internal.core.utils.ui.GridLayoutFactory;

import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Shell;

import org.apache.commons.io.IOUtils;

import java.io.InputStream;

/**
 * Dialog for selecting HTML file from public folders of modules.
 * 
 * @author scheglov_ke
 * @author lobas_av
 * @coverage gwt.util.ui
 */
public final class HtmlSelectionDialog extends ResourceSelectionDialog {
    private static final String[] EXTENSIONS = { "html", "shtml", "htm" };
    private static final Color RED = new Color(null, 255, 0, 0);

    ////////////////////////////////////////////////////////////////////////////
    //
    // Constructor
    //
    ////////////////////////////////////////////////////////////////////////////
    public HtmlSelectionDialog(Shell parentShell, IResourcesProvider provider, ModuleDescription moduleDescription,
            String title) throws Exception {
        super(parentShell, provider, moduleDescription, title);
        addFilter("HTML files", "*.html");
        addFilter("SSIs HTML files", "*.shtml");
        addFilter("HTM files", "*.htm");
    }

    ////////////////////////////////////////////////////////////////////////////
    //
    // Preview
    //
    ////////////////////////////////////////////////////////////////////////////
    @Override
    protected void previewFile(Composite parent, ResourceFile file) {
        if (checkExtension(file.getExtension())) {
            // create text control
            GridLayoutFactory.create(parent);
            StyledText htmlTextControl = new StyledText(parent,
                    SWT.BORDER | SWT.READ_ONLY | SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL);
            GridDataFactory.create(htmlTextControl).fill().grab();
            parent.layout();
            // set content
            try {
                InputStream stream = getResourceAsStream(file);
                try {
                    htmlTextControl.setText(IOUtils.toString(stream));
                } finally {
                    IOUtils.closeQuietly(stream);
                }
            } catch (Throwable e) {
                htmlTextControl.setText(e.getMessage());
                htmlTextControl.setForeground(RED);
            }
        }
    }

    ////////////////////////////////////////////////////////////////////////////
    //
    // Utils
    //
    ////////////////////////////////////////////////////////////////////////////
    private static boolean checkExtension(String extension) {
        for (String ext : EXTENSIONS) {
            if (ext.equalsIgnoreCase(extension)) {
                return true;
            }
        }
        return false;
    }
}