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

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

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/*
 * FileBrowserWidget.java
 *
 * Copyright (C) 2009-15 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.FocusTransitionManager;
import org.rstudio.core.client.events.SelectionCommitHandler;
import org.rstudio.core.client.files.FileSystemContext;
import org.rstudio.core.client.files.FileSystemItem;

import com.google.gwt.dom.client.Style;
import com.google.gwt.event.dom.client.KeyPressHandler;
import com.google.gwt.event.dom.client.KeyUpHandler;
import com.google.gwt.event.logical.shared.SelectionHandler;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.DockPanel;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.TextBox;
import com.google.gwt.user.client.ui.Widget;

public class FileBrowserWidget extends Composite implements FileSystemContext.Callbacks {
    public interface Host extends SelectionCommitHandler<FileSystemItem>, SelectionHandler<FileSystemItem> {
        String getFilenameLabel();

        void onError(String errorMessage);

        void maybeAccept();

        FileSystemItem[] ls();
    }

    public FileBrowserWidget(FileSystemContext context, Host host) {
        context_ = context;
        host_ = host;

        breadcrumb_ = new PathBreadcrumbWidget(context_);
        breadcrumb_.addSelectionCommitHandler(host);

        directory_ = new DirectoryContentsWidget(context_);
        directory_.addSelectionHandler(host);
        directory_.addSelectionCommitHandler(host);
        directory_.showProgress(true);

        DockPanel dockPanel = new DockPanel();
        Widget topWidget = createTopWidget();
        if (topWidget != null)
            dockPanel.add(topWidget, DockPanel.NORTH);
        dockPanel.add(breadcrumb_, DockPanel.NORTH);
        dockPanel.add(directory_, DockPanel.CENTER);

        initWidget(dockPanel);
    }

    // Public methods ----------------------------------------------------------

    public void setFilename(String filename) {
        if (filename_ != null)
            filename_.setText(filename);
        else
            initialFilename_ = filename;
    }

    public String getFilename() {
        return filename_.getText();
    }

    public void setFilenameEnabled(boolean enabled) {
        filename_.setEnabled(enabled);
    }

    public void selectFilename() {
        filename_.selectAll();
    }

    public void setFilenameFocus(boolean focus) {
        filename_.setFocus(focus);
    }

    public Style getFilenameStyle() {
        return filename_.getElement().getStyle();
    }

    public void onNavigated() {
        String dir = context_.pwd();

        final FileSystemItem[] parsedDir = context_.parseDir(dir);
        breadcrumb_.setDirectory(parsedDir, null);
        directory_.setContents(host_.ls(), parsedDir.length > 1 ? parsedDir[parsedDir.length - 2] : null);
        setDirectoryFocus(true);
    }

    public void cd(String path) {
        directory_.clearContents();
        directory_.showProgress(true);
        context_.cd(path);
    }

    public void cd(FileSystemItem dir) {
        assert dir.isDirectory();
        cd(dir.getPath());
    }

    public void addKeyUpHandler(KeyUpHandler handler) {
        filename_.addKeyUpHandler(handler);
    }

    public void addKeyPressHandler(KeyPressHandler handler) {
        filename_.addKeyPressHandler(handler);
    }

    public void setSelectedRow(Integer row) {
        directory_.setSelectedRow(row);
    }

    public void setDirectoryFocus(boolean focus) {
        directory_.setFocus(focus);
    }

    @Override
    public void onError(String errorMessage) {
        onNavigated();
    }

    @Override
    public void onDirectoryCreated(FileSystemItem directory) {
        directory_.addDirectory(directory);
    }

    public String getSelectedValue() {
        return directory_.getSelectedValue();
    }

    public FileSystemItem getSelectedItem() {
        return directory_.getSelectedItem();
    }

    public FileSystemItem getCurrentDirectory() {
        return context_.pwdItem();
    }

    // Private methods ---------------------------------------------------------

    private Widget createTopWidget() {
        String nameLabel = host_.getFilenameLabel();
        if (nameLabel == null)
            return null;

        HorizontalPanel filenamePanel = new HorizontalPanel();
        FileDialogStyles styles = FileDialogResources.INSTANCE.styles();
        filenamePanel.setStylePrimaryName(styles.filenamePanel());
        filenamePanel.setVerticalAlignment(HorizontalPanel.ALIGN_MIDDLE);

        Label filenameLabel = new Label(nameLabel + ":", false);
        filenameLabel.setStylePrimaryName(styles.filenameLabel());
        filenamePanel.add(filenameLabel);

        filename_ = new TextBox();
        if (initialFilename_ != null)
            filename_.setText(initialFilename_);
        filename_.setStylePrimaryName(styles.filename());
        filenamePanel.add(filename_);
        filenamePanel.setCellWidth(filename_, "100%");

        ftm_ = new FocusTransitionManager();
        ftm_.add(filename_, directory_);

        return filenamePanel;
    }

    private PathBreadcrumbWidget breadcrumb_;
    private DirectoryContentsWidget directory_;
    private TextBox filename_;
    private FileSystemContext context_;
    private String initialFilename_;
    private Host host_;
    private FocusTransitionManager ftm_;
}