org.rstudio.core.client.files.filedialog.OpenFileDialog.java Source code

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Here is the source code for org.rstudio.core.client.files.filedialog.OpenFileDialog.java

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/*
 * OpenFileDialog.java
 *
 * Copyright (C) 2009-12 by RStudio, Inc.
 *
 * Unless you have received this program directly from RStudio pursuant
 * to the terms of a commercial license agreement with RStudio, then
 * this program is licensed to you under the terms of version 3 of the
 * GNU Affero General Public License. This program is distributed WITHOUT
 * ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING THOSE OF NON-INFRINGEMENT,
 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Please refer to the
 * AGPL (http://www.gnu.org/licenses/agpl-3.0.txt) for more details.
 *
 */
package org.rstudio.core.client.files.filedialog;

import org.rstudio.core.client.files.FileSystemContext;
import org.rstudio.core.client.files.FileSystemItem;
import org.rstudio.core.client.widget.ProgressOperationWithInput;

import com.google.gwt.event.logical.shared.SelectionEvent;

public class OpenFileDialog extends FileDialog {
    public OpenFileDialog(String title, FileSystemContext context, String filter, boolean canChooseDirectories,
            ProgressOperationWithInput<FileSystemItem> operation) {
        super(title, null, "Open", false, false, false, context, filter, operation);

        canChooseDirectories_ = canChooseDirectories;
    }

    @Override
    public boolean shouldAccept() {
        if (canChooseDirectories_) {
            FileSystemItem item = browser_.getSelectedItem();
            String fileInput = browser_.getFilename().trim();

            // if we have no user input nor a selected item,
            // interpret this as a request to open the active
            // directory as an RStudio project
            if (item == null && fileInput.isEmpty())
                return true;

            // if the user has selected a directory, and there
            // is no user input, interpret that as a request to
            // navigate into that directory
            if (item != null && item.isDirectory()) {
                cd(item.getPath());
                return false;
            }
        }

        return super.shouldAccept();
    }

    @Override
    public void onNavigated() {
        super.onNavigated();
        browser_.setFilename("");
    }

    @Override
    protected FileSystemItem getSelectedItem() {
        FileSystemItem item = browser_.getSelectedItem();
        if (item == null)
            item = browser_.getCurrentDirectory();
        return item;
    }

    @Override
    public void onSelection(SelectionEvent<FileSystemItem> event) {
        super.onSelection(event);

        // clear the active filename whenever a directory
        // is selected -- this allows us to disambiguate
        // 'fresh' from 'stale' user input; ie, tell whether
        // the user is navigating in the widget or typing in
        // the file name textbox
        if (event.getSelectedItem().isDirectory())
            browser_.setFilename("");
    }

    protected final boolean canChooseDirectories_;
}