Synnefo » Pithos

/*

 * Copyright 2007, 2008, 2009 Electronic Business Systems Ltd.

 *

 * This file is part of GSS.

 *

 * GSS is free software: you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation, either version 3 of the License, or

 * (at your option) any later version.

 *

 * GSS is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with GSS.  If not, see <http://www.gnu.org/licenses/>.

 */

package gr.ebs.gss.client;

import gr.ebs.gss.client.commands.GetUserCommand;

import gr.ebs.gss.client.dnd.DnDSimpleFocusPanel;

import gr.ebs.gss.client.dnd.DnDTreeItem;

import gr.ebs.gss.client.rest.GetCommand;

import gr.ebs.gss.client.rest.MultipleHeadCommand;

import gr.ebs.gss.client.rest.RestCommand;

import gr.ebs.gss.client.rest.RestException;

import gr.ebs.gss.client.rest.resource.FileResource;

import gr.ebs.gss.client.rest.resource.FolderResource;

import gr.ebs.gss.client.rest.resource.OtherUserResource;

import gr.ebs.gss.client.rest.resource.SharedResource;

import gr.ebs.gss.client.rest.resource.TrashResource;

import gr.ebs.gss.client.rest.resource.UserResource;

import java.util.ArrayList;

import java.util.Collections;

import java.util.Comparator;

import java.util.List;

import com.google.gwt.core.client.GWT;

import com.google.gwt.dom.client.NativeEvent;

import com.google.gwt.event.dom.client.ClickEvent;

import com.google.gwt.event.dom.client.ClickHandler;

import com.google.gwt.http.client.URL;

import com.google.gwt.i18n.client.DateTimeFormat;

import com.google.gwt.resources.client.ClientBundle;

import com.google.gwt.resources.client.ImageResource;

import com.google.gwt.user.client.DOM;

import com.google.gwt.user.client.DeferredCommand;

import com.google.gwt.user.client.Event;

import com.google.gwt.user.client.IncrementalCommand;

import com.google.gwt.user.client.Window;

import com.google.gwt.user.client.ui.AbstractImagePrototype;

import com.google.gwt.user.client.ui.Composite;

import com.google.gwt.user.client.ui.Grid;

import com.google.gwt.user.client.ui.HTML;

import com.google.gwt.user.client.ui.HasHorizontalAlignment;

import com.google.gwt.user.client.ui.HorizontalPanel;

import com.google.gwt.user.client.ui.TreeItem;

import com.google.gwt.user.client.ui.Widget;

import com.google.gwt.user.client.ui.HTMLTable.Cell;

/**

 * A composite that displays the list of files in a particular folder.

 */

public class FileList extends Composite implements ClickHandler {

        private HTML prevButton = new HTML("<a href='javascript:;'>&lt; Previous</a>", true);

        private HTML nextButton = new HTML("<a href='javascript:;'>Next &gt;</a>", true);

        private String showingStats = "";

        private int startIndex = 0;

        /**

         * A constant that denotes the completion of an IncrementalCommand.

         */

        public static final boolean DONE = false;

        private boolean clickControl = false;

        private boolean clickShift = false;

        private int firstShift = -1;

        private ArrayList<Integer> selectedRows = new ArrayList<Integer>();

        /**

         * The context menu for the selected file.

         */

        final DnDSimpleFocusPanel contextMenu;

        /**

         * Specifies that the images available for this composite will be the ones

         * available in FileContextMenu.

         */

        public interface Images extends ClientBundle,FileContextMenu.Images, Folders.Images {

                @Source("gr/ebs/gss/resources/blank.gif")

                ImageResource blank();

                @Source("gr/ebs/gss/resources/asc.png")

                ImageResource asc();

                @Source("gr/ebs/gss/resources/desc.png")

                ImageResource desc();

                @Source("gr/ebs/gss/resources/mimetypes/document_shared.png")

                ImageResource documentShared();

                @Source("gr/ebs/gss/resources/mimetypes/kcmfontinst.png")

                ImageResource wordprocessor();

                @Source("gr/ebs/gss/resources/mimetypes/log.png")

                ImageResource spreadsheet();

                @Source("gr/ebs/gss/resources/mimetypes/kpresenter_kpr.png")

                ImageResource presentation();

                @Source("gr/ebs/gss/resources/mimetypes/acroread.png")

                ImageResource pdf();

                @Source("gr/ebs/gss/resources/mimetypes/image.png")

                ImageResource image();

                @Source("gr/ebs/gss/resources/mimetypes/video2.png")

                ImageResource video();

                @Source("gr/ebs/gss/resources/mimetypes/knotify.png")

                ImageResource audio();

                @Source("gr/ebs/gss/resources/mimetypes/html.png")

                ImageResource html();

                @Source("gr/ebs/gss/resources/mimetypes/txt.png")

                ImageResource txt();

                @Source("gr/ebs/gss/resources/mimetypes/ark2.png")

                ImageResource zip();

                @Source("gr/ebs/gss/resources/mimetypes/kcmfontinst_shared.png")

                ImageResource wordprocessorShared();

                @Source("gr/ebs/gss/resources/mimetypes/log_shared.png")

                ImageResource spreadsheetShared();

                @Source("gr/ebs/gss/resources/mimetypes/kpresenter_kpr_shared.png")

                ImageResource presentationShared();

                @Source("gr/ebs/gss/resources/mimetypes/acroread_shared.png")

                ImageResource pdfShared();

                @Source("gr/ebs/gss/resources/mimetypes/image_shared.png")

                ImageResource imageShared();

                @Source("gr/ebs/gss/resources/mimetypes/video2_shared.png")

                ImageResource videoShared();

                @Source("gr/ebs/gss/resources/mimetypes/knotify_shared.png")

                ImageResource audioShared();

                @Source("gr/ebs/gss/resources/mimetypes/html_shared.png")

                ImageResource htmlShared();

                @Source("gr/ebs/gss/resources/mimetypes/txt_shared.png")

                ImageResource txtShared();

                @Source("gr/ebs/gss/resources/mimetypes/ark2_shared.png")

                ImageResource zipShared();

        }

        /**

         * A label with the number of files in this folder.

         */

        private HTML countLabel = new HTML();

        /**

         * The table widget with the file list.

         */

        private FileTable table = new FileTable(GSS.VISIBLE_FILE_COUNT + 1, 8);

        /**

         * The navigation bar for paginating the results.

         */

        private HorizontalPanel navBar = new HorizontalPanel();

        /**

         * The number of files in this folder.

         */

        int folderFileCount;

        /**

         * Total folder size

         */

        long folderTotalSize;

        /**

         * A cache of the files in the list.

         */

        private List<FileResource> files;

        /**

         * The widget's image bundle.

         */

        private final Images images;

        private String sortingProperty = "name";

        private boolean sortingType = true;

        private HTML nameLabel;

        private HTML versionLabel;

        private HTML sizeLabel;

        private HTML dateLabel;

        private HTML ownerLabel;

        private HTML pathLabel;

        /**

         * Construct the file list widget. This entails setting up the widget

         * layout, fetching the number of files in the current folder from the

         * server and filling the local file cache of displayed files with data from

         * the server, as well.

         *

         * @param _images

         */

        public FileList(Images _images) {

                images = _images;

                prevButton.addClickHandler(this);

                nextButton.addClickHandler(this);

                contextMenu = new DnDSimpleFocusPanel(new HTML(AbstractImagePrototype.create(images.fileContextMenu()).getHTML()));

                GSS.get().getDragController().makeDraggable(contextMenu);

                // Setup the table.

                table.setCellSpacing(0);

                table.setCellPadding(2);

                table.setWidth("100%");

                table.addClickHandler(new ClickHandler() {

                        @Override

                        public void onClick(ClickEvent event) {

                                Cell cell = table.getCellForEvent(event);

                                GWT.log("row clicked:"+cell.getRowIndex(), null);

                                onRowClicked(cell.getRowIndex(), true);

                        }

                });

                // Create the 'navigation' bar at the upper-right.

                HorizontalPanel innerNavBar = new HorizontalPanel();

                innerNavBar.setStyleName("gss-ListNavBar");

                innerNavBar.setSpacing(8);

                innerNavBar.add(prevButton);

                innerNavBar.add(countLabel);

                innerNavBar.add(nextButton);

                navBar.setHorizontalAlignment(HasHorizontalAlignment.ALIGN_RIGHT);

                navBar.add(innerNavBar);

                navBar.setWidth("100%");

                initWidget(table);

                setStyleName("gss-List");

                initTable();

                DeferredCommand.addCommand(new IncrementalCommand() {

                        @Override

                        public boolean execute() {

                                return fetchRootFolder();

                        }

                });

                sinkEvents(Event.ONCONTEXTMENU);

                sinkEvents(Event.ONMOUSEUP);

                sinkEvents(Event.ONMOUSEDOWN);

                sinkEvents(Event.ONCLICK);

                sinkEvents(Event.ONKEYDOWN);

                sinkEvents(Event.ONDBLCLICK);

                GSS.preventIESelection();

        }

        @Override

        public void onClick(ClickEvent event) {

                 if(event.getSource() == nextButton){

                        // Move forward a page.

                        clearSelectedRows();

                        startIndex += GSS.VISIBLE_FILE_COUNT;

                        if (startIndex >= folderFileCount)

                                startIndex -= GSS.VISIBLE_FILE_COUNT;

                        else

                                update(false);

                } else if (event.getSource() == prevButton) {

                        clearSelectedRows();

                        // Move back a page.

                        startIndex -= GSS.VISIBLE_FILE_COUNT;

                        if (startIndex < 0)

                                startIndex = 0;

                        else

                                update(false);

                }

        }

        @Override

        public void onBrowserEvent(Event event) {

                if (DOM.eventGetType(event) == Event.ONMOUSEDOWN && DOM.eventGetButton(event) == NativeEvent.BUTTON_RIGHT){

                        if (DOM.eventGetCtrlKey(event))

                                clickControl = true;

                        else

                                clickControl = false;

                        if (DOM.eventGetShiftKey(event)) {

                                clickShift = true;

                                if (selectedRows.size() == 1)

                                        firstShift = selectedRows.get(0) - startIndex;

                                //event.preventDefault();

                        } else {

                                clickShift = false;

                                firstShift = -1;

                                //event.preventDefault();

                        }

                        int ri = table.getRowForEvent2(event);

                        if(ri != -1)

                                if(!selectedRows.contains(ri-1))

                                        onRowClicked(ri, false);

                }

                if (files == null || files.size() == 0) {

                        if (DOM.eventGetType(event) == Event.ONCONTEXTMENU && selectedRows.size() == 0) {

                                FileContextMenu fm = new FileContextMenu(images, false, true);

                                fm.onEmptyEvent(event);

                        }

                        return;

                }

                if (DOM.eventGetType(event) == Event.ONCONTEXTMENU && selectedRows.size() != 0) {

                        FileContextMenu fm = new FileContextMenu(images, false, false);

                        fm.onEvent(event);

                } else if (DOM.eventGetType(event) == Event.ONCONTEXTMENU && selectedRows.size() == 0) {

                        FileContextMenu fm = new FileContextMenu(images, false, true);

                        fm.onEmptyEvent(event);

                } else if (DOM.eventGetType(event) == Event.ONDBLCLICK)

                        if (getSelectedFiles().size() == 1) {

                                GSS app = GSS.get();

                                FileResource file = getSelectedFiles().get(0);

                                String dateString = RestCommand.getDate();

                                String resource = file.getUri().substring(app.getApiPath().length() - 1, file.getUri().length());

                                String sig = app.getCurrentUserResource().getUsername() + " " +

                                                RestCommand.calculateSig("GET", dateString, resource,

                                                RestCommand.base64decode(app.getToken()));

                                Window.open(file.getUri() + "?Authorization=" + URL.encodeComponent(sig) + "&Date=" + URL.encodeComponent(dateString), "_blank", "");

                                event.preventDefault();

                                return;

                        }

                if (DOM.eventGetType(event) == Event.ONCLICK) {

                        if (DOM.eventGetCtrlKey(event))

                                clickControl = true;

                        else

                                clickControl = false;

                        if (DOM.eventGetShiftKey(event)) {

                                clickShift = true;

                                if (selectedRows.size() == 1)

                                        firstShift = selectedRows.get(0) - startIndex;

                                //event.preventDefault();

                        } else {

                                clickShift = false;

                                firstShift = -1;

                                //event.preventDefault();

                        }

                }

                super.onBrowserEvent(event);

        }

        /**

         * Retrieve the root folder for the current user.

         *

         * @return true if the retrieval was successful

         */

        protected boolean fetchRootFolder() {

                UserResource user = GSS.get().getCurrentUserResource();

                if (user == null)

                        return !DONE;

                // Update cache and clear selection.

                updateFileCache(true);

                return DONE;

        }

        private void onRowClicked(int row, boolean toggleSelection) {

                // Select the row that was clicked (-1 to account for header row).

                if (row > folderFileCount)

                        return;

                if (clickShift) {

                        GWT.log("Row is: " + row + " fs: " + firstShift, null);

                        if (firstShift == -1)

                                firstShift = row;

                        else if (row > firstShift) {

                                clearSelectedRows();

                                for (int i = firstShift; i < row; i++) {

                                        selectedRows.add(startIndex + i);

                                        styleRow(i, true);

                                }

                                GSS.get().setCurrentSelection(getSelectedFiles());

                                contextMenu.setFiles(getSelectedFiles());

                                makeRowDraggable(row);

                        } else if (row != -1 && row == firstShift) {

                                selectedRows.add(row - 1);

                                styleRow(row, true);

                                styleRow(row - 1, true);

                                GSS.get().setCurrentSelection(getSelectedFiles());

                                contextMenu.setFiles(getSelectedFiles());

                                makeRowDraggable(row);

                        } else if (row < firstShift) {

                                GWT.log("Row is:" + row + " fs:" + firstShift, null);

                                clearSelectedRows();

                                for (int i = firstShift; i >= row - 1; i--) {

                                        selectedRows.add(startIndex + i);

                                        styleRow(i, true);

                                }

                                GSS.get().setCurrentSelection(getSelectedFiles());

                                makeRowDraggable(row);

                                contextMenu.setFiles(getSelectedFiles());

                        }

                } else if (row > 0)

                        selectRow(row - 1, toggleSelection);

        }

        /**

         * Initializes the table so that it contains enough rows for a full page of

         * files.

         */

        private void initTable() {

                nameLabel = new HTML("Name");

                nameLabel.addClickHandler(new ClickHandler() {

                        @Override

                        public void onClick(ClickEvent event) {

                                sortFiles("name");

                        }

                });

                versionLabel = new HTML("Version");

                versionLabel.addClickHandler(new ClickHandler() {

                        @Override

                        public void onClick(ClickEvent event) {

                                sortFiles("version");

                        }

                });

                sizeLabel = new HTML("Size");

                sizeLabel.addClickHandler(new ClickHandler() {

                        @Override

                        public void onClick(ClickEvent event) {

                                sortFiles("size");

                        }

                });

                dateLabel = new HTML("Last modified");

                dateLabel.addClickHandler(new ClickHandler() {

                        @Override

                        public void onClick(ClickEvent event) {

                                sortFiles("date");

                        }

                });

                ownerLabel = new HTML("Owner");

                ownerLabel.addClickHandler(new ClickHandler() {

                        @Override

                        public void onClick(ClickEvent event) {

                                sortFiles("owner");

                        }

                });

                pathLabel = new HTML("Path");

                pathLabel.addClickHandler(new ClickHandler() {

                        @Override

                        public void onClick(ClickEvent event) {

                                sortFiles("path");

                        }

                });

                // Create the header row.

                table.setText(0, 0, "");

                table.setWidget(0, 1, nameLabel);

                table.setWidget(0, 2, ownerLabel);

                table.setWidget(0, 3, pathLabel);

                table.setWidget(0, 4, versionLabel);

                table.setWidget(0, 5, sizeLabel);

                table.setWidget(0, 6, dateLabel);

                table.setWidget(0, 7, navBar);

                table.getRowFormatter().setStyleName(0, "gss-ListHeader");

                // Initialize the rest of the rows.

                for (int i = 1; i < GSS.VISIBLE_FILE_COUNT + 1; ++i) {

                        table.setText(i, 0, "");

                        table.setText(i, 1, "");

                        table.setText(i, 2, "");

                        table.setText(i, 3, "");

                        table.setText(i, 4, "");

                        table.setText(i, 5, "");

                        table.setText(i, 6, "");

                        table.setText(i, 7, "");

                        table.getCellFormatter().setWordWrap(i, 0, false);

                        table.getCellFormatter().setWordWrap(i, 1, false);

                        table.getCellFormatter().setWordWrap(i, 2, false);

                        table.getCellFormatter().setWordWrap(i, 3, false);

                        table.getCellFormatter().setWordWrap(i, 4, false);

                        table.getCellFormatter().setWordWrap(i, 5, false);

                        table.getCellFormatter().setWordWrap(i, 6, false);

                        table.getCellFormatter().setWordWrap(i, 7, false);

                        table.getCellFormatter().setHorizontalAlignment(i, 4, HasHorizontalAlignment.ALIGN_CENTER);

                }

                prevButton.setVisible(false);

                nextButton.setVisible(false);

        }

        /**

         * Selects the given row (relative to the current page).

         *

         * @param row the row to be selected

         */

        private void selectRow(final int row, boolean toggleSelection) {

                if (row < folderFileCount) {

                        if (clickControl)

                                if (selectedRows.contains(row) && toggleSelection) {

                                        int i = selectedRows.indexOf(startIndex + row);

                                        selectedRows.remove(i);

                                        styleRow(row, false);

                                } else {

                                        selectedRows.add(startIndex + row);

                                        styleRow(row, true);

                                }

                        else if (selectedRows.size() == 1 && selectedRows.contains(row) && toggleSelection){

                                clearSelectedRows();

                                return;

                        }

                        else {

                                clearSelectedRows();

                                selectedRows.add(startIndex + row);

                                styleRow(row, true);

                        }

                        if (selectedRows.size() == 1)

                                GSS.get().setCurrentSelection(files.get(selectedRows.get(0)));

                        else if(selectedRows.size() == 0)

                                GSS.get().setCurrentSelection(null);

                        else

                                GSS.get().setCurrentSelection(getSelectedFiles());

                        contextMenu.setFiles(getSelectedFiles());

                        makeRowDraggable(row+1);

                }

        }

        public List<FileResource> getSelectedFiles() {

                List<FileResource> result = new ArrayList();

                for (int i : selectedRows)

                        result.add(files.get(i));

                return result;

        }

        /**

         * Make the specified row look like selected or not, according to the

         * <code>selected</code> flag.

         *

         * @param row

         * @param selected

         */

        void styleRow(final int row, final boolean selected) {

                if (row != -1 && row >= 0)

                        if (selected)

                                table.getRowFormatter().addStyleName(row + 1, "gss-SelectedRow");

                        else

                                table.getRowFormatter().removeStyleName(row + 1, "gss-SelectedRow");

        }

        /**

         * Update the display of the file list.

         */

        void update(boolean sort) {

                int count = folderFileCount;

                int max = startIndex + GSS.VISIBLE_FILE_COUNT;

                if (max > count)

                        max = count;

                folderTotalSize = 0;

                if (sort && files != null && files.size() != 0) {

                        clearLabels();

                        clearSelectedRows();

                        Collections.sort(files, new Comparator<FileResource>() {

                                @Override

                                public int compare(FileResource arg0, FileResource arg1) {

                                        AbstractImagePrototype descPrototype = AbstractImagePrototype.create(images.desc());

                                        AbstractImagePrototype ascPrototype = AbstractImagePrototype.create(images.asc());

                                        if (sortingType)

                                                if (sortingProperty.equals("version")) {

                                                        versionLabel.setHTML("Version " + descPrototype.getHTML());

                                                        return arg0.getVersion().compareTo(arg1.getVersion());

                                                } else if (sortingProperty.equals("owner")) {

                                                        ownerLabel.setHTML("Owner " + descPrototype.getHTML());

                                                        return arg0.getOwner().compareTo(arg1.getOwner());

                                                } else if (sortingProperty.equals("date")) {

                                                        dateLabel.setHTML("Date modified " + descPrototype.getHTML());

                                                        return arg0.getModificationDate().compareTo(arg1.getModificationDate());

                                                } else if (sortingProperty.equals("size")) {

                                                        sizeLabel.setHTML("Size " + descPrototype.getHTML());

                                                        return arg0.getContentLength().compareTo(arg1.getContentLength());

                                                } else if (sortingProperty.equals("name")) {

                                                        nameLabel.setHTML("Name " + descPrototype.getHTML());

                                                        return arg0.getName().compareTo(arg1.getName());

                                                } else if (sortingProperty.equals("path")) {

                                                        pathLabel.setHTML("Path " + descPrototype.getHTML());

                                                        return arg0.getUri().compareTo(arg1.getUri());

                                                } else {

                                                        nameLabel.setHTML("Name " + descPrototype.getHTML());

                                                        return arg0.getName().compareTo(arg1.getName());

                                                }

                                        else if (sortingProperty.equals("version")) {

                                                versionLabel.setHTML("Version " + ascPrototype.getHTML());

                                                return arg1.getVersion().compareTo(arg0.getVersion());

                                        } else if (sortingProperty.equals("owner")) {

                                                ownerLabel.setHTML("Owner " + ascPrototype.getHTML());

                                                return arg1.getOwner().compareTo(arg0.getOwner());

                                        } else if (sortingProperty.equals("date")) {

                                                dateLabel.setHTML("Date modified " + ascPrototype.getHTML());

                                                return arg1.getModificationDate().compareTo(arg0.getModificationDate());

                                        } else if (sortingProperty.equals("size")) {

                                                sizeLabel.setHTML("Size " + ascPrototype.getHTML());

                                                return arg1.getContentLength().compareTo(arg0.getContentLength());

                                        } else if (sortingProperty.equals("name")) {

                                                nameLabel.setHTML("Name " + ascPrototype.getHTML());

                                                return arg1.getName().compareTo(arg0.getName());

                                        } else if (sortingProperty.equals("path")) {

                                                pathLabel.setHTML("Path " + ascPrototype.getHTML());

                                                return arg1.getUri().compareTo(arg0.getUri());

                                        } else {

                                                nameLabel.setHTML("Name " + ascPrototype.getHTML());

                                                return arg1.getName().compareTo(arg0.getName());

                                        }

                                }

                        });

                }

                // Show the selected files.

                int i = 1;

                for (; i < GSS.VISIBLE_FILE_COUNT + 1; ++i) {

                        // Don't read past the end.

                        // if (i > folderFileCount)

                        // break;

                        if (startIndex + i > folderFileCount)

                                break;

                        // Add a new row to the table, then set each of its columns to the

                        // proper values.

                        FileResource file = files.get(startIndex + i - 1);

                        table.setWidget(i, 0, getFileIcon(file).createImage());

                        table.getRowFormatter().addStyleName(i, "gss-fileRow");

                        //add view image link for image files

                        String contentType = file.getContentType();

                        if (contentType.endsWith("png") || contentType.endsWith("gif") || contentType.endsWith("jpeg") )

                                table.setHTML(i, 1, file.getName() + " <a href='" +

                                                GSS.get().getTopPanel().getFileMenu().getDownloadURL(file) +

                                                "' title='" + file.getName() + "' rel='lytebox[p]' " +

                                                "onclick='myLytebox.start(this, false, false);return false;'>" +

                                                "(view)" + "</a>");

                        else

                                table.setHTML(i, 1, file.getName());

                        if(GSS.get().findUserFullName(file.getOwner()) == null){

                                GetUserCommand guc = new GetUserCommand(file.getOwner());

                                guc.execute();

                                GSS.get().putUserToMap(file.getOwner(), file.getOwner());

                        }

                        table.setText(i, 2, GSS.get().getUserFullName(file.getOwner()));

                        table.setText(i, 3, file.getPath());

                        table.setText(i, 4, String.valueOf(file.getVersion()));

                        table.setText(i, 5, String.valueOf(file.getFileSizeAsString()));

                        final DateTimeFormat formatter = DateTimeFormat.getFormat("d/M/yyyy h:mm a");

                        table.setText(i, 6, formatter.format(file.getModificationDate()));

                        folderTotalSize += file.getContentLength();

                }

                // Clear any remaining slots.

                for (; i < GSS.VISIBLE_FILE_COUNT + 1; ++i) {

                        table.setHTML(i, 0, " ");

                        table.setHTML(i, 1, " ");

                        table.setHTML(i, 2, " ");

                        table.setHTML(i, 3, " ");

                        table.setHTML(i, 4, " ");

                        table.setHTML(i, 5, " ");

                        table.setHTML(i, 6, " ");

                        table.setHTML(i, 7, " ");

                }

                if (folderFileCount == 0) {

                        showingStats = "no files";

                        prevButton.setVisible(false);

                        nextButton.setVisible(false);

                } else if (folderFileCount < GSS.VISIBLE_FILE_COUNT) {

                        if (folderFileCount == 1)

                                showingStats = "1 file";

                        else

                                showingStats = folderFileCount + " files";

                        showingStats += " (" + FileResource.getFileSizeAsString(folderTotalSize) + ")";

                        prevButton.setVisible(false);

                        nextButton.setVisible(false);

                } else {

                        showingStats = "" + (startIndex + 1) + " - " + max + " of " + count + " files" + " (" + FileResource.getFileSizeAsString(folderTotalSize) + ")";

                        prevButton.setVisible(startIndex != 0);

                        nextButton.setVisible(startIndex + GSS.VISIBLE_FILE_COUNT < count);

                }

                updateCurrentlyShowingStats();

        }

        /**

         * Return the proper icon based on the MIME type of the file.

         *

         * @param file

         * @return the icon

         */

        private AbstractImagePrototype getFileIcon(FileResource file) {

                String mimetype = file.getContentType();

                boolean shared=false;

                Folders folders = GSS.get().getFolders();

                if(folders.getCurrent() != null && folders.isOthersSharedItem(folders.getCurrent())){

                        DnDTreeItem otherUser = (DnDTreeItem) folders.getUserOfSharedItem(folders.getCurrent());

                        if(otherUser==null)

                                shared = false;

                        else{

                                String uname = otherUser.getOtherUserResource().getUsername();

                                if(uname==null)

                                        uname = ((DnDTreeItem)folders.getSharesItem()).getOthersResource().getUsernameOfUri(otherUser.getOtherUserResource().getUri());

                                if(uname != null)

                                        shared = file.getShared();

                        }

                }

                else

                        shared = file.getShared();

                if (mimetype == null)

                        return shared ? AbstractImagePrototype.create(images.documentShared()) : AbstractImagePrototype.create(images.document());

                mimetype = mimetype.toLowerCase();

                if (mimetype.startsWith("application/pdf"))

                        return shared ? AbstractImagePrototype.create(images.pdfShared()) : AbstractImagePrototype.create(images.pdf());

                else if (mimetype.endsWith("excel"))

                        return shared ? AbstractImagePrototype.create(images.spreadsheetShared()) : AbstractImagePrototype.create(images.spreadsheet());

                else if (mimetype.endsWith("msword"))

                        return shared ? AbstractImagePrototype.create(images.wordprocessorShared()) : AbstractImagePrototype.create(images.wordprocessor());

                else if (mimetype.endsWith("powerpoint"))

                        return shared ? AbstractImagePrototype.create(images.presentationShared()) : AbstractImagePrototype.create(images.presentation());

                else if (mimetype.startsWith("application/zip") ||

                                        mimetype.startsWith("application/gzip") ||

                                        mimetype.startsWith("application/x-gzip") ||

                                        mimetype.startsWith("application/x-tar") ||

                                        mimetype.startsWith("application/x-gtar"))

                        return shared ? AbstractImagePrototype.create(images.zipShared()) : AbstractImagePrototype.create(images.zip());

                else if (mimetype.startsWith("text/html"))

                        return shared ? AbstractImagePrototype.create(images.htmlShared()) : AbstractImagePrototype.create(images.html());

                else if (mimetype.startsWith("text/plain"))

                        return shared ? AbstractImagePrototype.create(images.txtShared()) : AbstractImagePrototype.create(images.txt());

                else if (mimetype.startsWith("image/"))

                        return shared ? AbstractImagePrototype.create(images.imageShared()) : AbstractImagePrototype.create(images.image());

                else if (mimetype.startsWith("video/"))

                        return shared ? AbstractImagePrototype.create(images.videoShared()) : AbstractImagePrototype.create(images.video());

                else if (mimetype.startsWith("audio/"))

                        return shared ? AbstractImagePrototype.create(images.audioShared()) : AbstractImagePrototype.create(images.audio());

                return shared ? AbstractImagePrototype.create(images.documentShared()) : AbstractImagePrototype.create(images.document());

        }

        /**

         * Update status panel with currently showing file stats.

         */

        public void updateCurrentlyShowingStats() {

                GSS.get().getStatusPanel().updateCurrentlyShowing(showingStats);

        }

        /**

         * Adjust the height of the table by adding and removing rows as necessary.

         *

         * @param newHeight the new height to reach

         */

        void resizeTableHeight(final int newHeight) {

                GWT.log("Panel: " + newHeight + ", parent: " + table.getParent().getOffsetHeight(), null);

                // Fill the rest with empty slots.

                if (newHeight > table.getOffsetHeight())

                        while (newHeight > table.getOffsetHeight()) {

                                table.resizeRows(table.getRowCount() + 1);

                                GWT.log("Table: " + table.getOffsetHeight() + ", rows: " + table.getRowCount(), null);

                        }

                else

                        while (newHeight < table.getOffsetHeight()) {

                                table.resizeRows(table.getRowCount() - 1);

                                GWT.log("Table: " + table.getOffsetHeight() + ", rows: " + table.getRowCount(), null);

                        }

        }

        public void updateFileCache(boolean updateSelectedFolder, final boolean clearSelection) {

                updateFileCache(updateSelectedFolder, clearSelection, null);

        }

        public void updateFileCache(boolean updateSelectedFolder, final boolean clearSelection, final String newFilename) {

                if (!updateSelectedFolder && !GSS.get().getFolders().getTrashItem().equals(GSS.get().getFolders().getCurrent()))

                        updateFileCache(clearSelection);

                else if (GSS.get().getFolders().getCurrent() != null) {

                        final DnDTreeItem folderItem = (DnDTreeItem) GSS.get().getFolders().getCurrent();

                        if( folderItem.getFolderResource()!= null){

                                if(GSS.get().getFolders().isFileItem(folderItem) || GSS.get().getFolders().isMySharedItem(folderItem)  || GSS.get().getFolders().isOthersSharedItem(folderItem) ){

                                        update(true);

                                        GetCommand<FolderResource> gf = new GetCommand<FolderResource>(FolderResource.class, folderItem.getFolderResource().getUri(),folderItem.getFolderResource()) {

                                                        @Override

                                                        public void onComplete() {

                                                                folderItem.setUserObject(getResult());

                                                                if(GSS.get().getFolders().isFileItem(folderItem)){

                                                                        //remove random from path

                                                                        for(FileResource r : folderItem.getFolderResource().getFiles()){

                                                                                String p = r.getUri();

                                                                                int indexOfQuestionMark = p.lastIndexOf('?');

                                                                                if(indexOfQuestionMark>0)

                                                                                        r.setUri(p.substring(0, indexOfQuestionMark));

                                                                                GWT.log("FETCHED:"+r.getLastModifiedSince(), null);

                                                                        }

                                                                        folderItem.getFolderResource().setFilesExpanded(true);

                                                                        updateFileCache(clearSelection, newFilename);

                                                                }

                                                                else

                                                                        updateFileCache(clearSelection, newFilename);

                                                        }

                                                        @Override

                                                        public void onError(Throwable t) {

                                                                GWT.log("", t);

                                                                GSS.get().displayError("Unable to fetch folder " + folderItem.getFolderResource().getName());

                                                        }

                                                };

                                                DeferredCommand.addCommand(gf);

                                }

                        }

                        else if (folderItem.getTrashResource() != null) {

                                GetCommand<TrashResource> gt = new GetCommand<TrashResource>(TrashResource.class, folderItem.getTrashResource().getUri(), null) {

                                        @Override

                                        public void onComplete() {

                                                folderItem.setUserObject(getResult());

                                                updateFileCache(clearSelection);

                                        }

                                        @Override

                                        public void onError(Throwable t) {

                                                if (t instanceof RestException && (((RestException) t).getHttpStatusCode() == 204 || ((RestException) t).getHttpStatusCode() == 1223)) {

                                                        folderItem.setUserObject(new TrashResource(folderItem.getTrashResource().getUri()));

                                                        updateFileCache(clearSelection);

                                                } else {

                                                        GWT.log("", t);

                                                        GSS.get().displayError("Unable to fetch trash resource");

                                                }

                                        }

                                };

                                DeferredCommand.addCommand(gt);

                        } else if (folderItem.getSharedResource() != null) {

                                GetCommand<SharedResource> gt = new GetCommand<SharedResource>(SharedResource.class, folderItem.getSharedResource().getUri(), null) {

                                        @Override

                                        public void onComplete() {

                                                folderItem.setUserObject(getResult());

                                                for(FileResource r : folderItem.getSharedResource().getFiles()){

                                                        String p = r.getUri();

                                                        int indexOfQuestionMark = p.lastIndexOf('?');

                                                        if(indexOfQuestionMark>0)

                                                                r.setUri(p.substring(0, indexOfQuestionMark));

                                                        GWT.log("FETCHED:"+r.getLastModifiedSince(), null);

                                                }

                                                folderItem.getSharedResource().setFilesExpanded(true);

                                                updateFileCache(clearSelection, newFilename);

                                        }

                                        @Override

                                        public void onError(Throwable t) {

                                                GWT.log("", t);

                                                GSS.get().displayError("Unable to fetch My Shares resource");

                                        }

                                };

                                DeferredCommand.addCommand(gt);

                        } else if (folderItem.getOtherUserResource() != null) {

                                GetCommand<OtherUserResource> gt = new GetCommand<OtherUserResource>(OtherUserResource.class, folderItem.getOtherUserResource().getUri(), null) {

                                        @Override

                                        public void onComplete() {

                                                folderItem.setUserObject(getResult());

                                                //updateFileCache(clearSelection, newFilename);

                                                for(FileResource r : folderItem.getOtherUserResource().getFiles()){

                                                        String p = r.getUri();

                                                        int indexOfQuestionMark = p.lastIndexOf('?');

                                                        if(indexOfQuestionMark>0)

                                                                r.setUri(p.substring(0, indexOfQuestionMark));

                                                        GWT.log("FETCHED:"+r.getLastModifiedSince(), null);

                                                }

                                                folderItem.getOtherUserResource().setFilesExpanded(true);

                                                updateFileCache(clearSelection, newFilename);

                                        }

                                        @Override

                                        public void onError(Throwable t) {

                                                GWT.log("", t);

                                                GSS.get().displayError("Unable to fetch My Shares resource");

                                        }

                                };

                                DeferredCommand.addCommand(gt);

                        }

                } else

                        updateFileCache(clearSelection);

        }

        private void updateFileCache(boolean clearSelection) {

                updateFileCache(clearSelection, null);

        }

        /**

         * Update the file cache with data from the server.

         *

         * @param userId the ID of the current user

         * @param newFilename the new name of the previously selected file,

         *                         if a rename operation has taken place

         */

        private void updateFileCache(boolean clearSelection, String newFilename) {

                if (clearSelection)

                        clearSelectedRows();

                clearLabels();

                startIndex = 0;

                final TreeItem folderItem = GSS.get().getFolders().getCurrent();

                // Validation.

                if (folderItem == null || GSS.get().getFolders().isOthersShared(folderItem)) {

                        setFiles(new ArrayList<FileResource>());

                        update(true);

                        return;

                }

                if (folderItem instanceof DnDTreeItem) {

                        DnDTreeItem dnd = (DnDTreeItem) folderItem;

                        if (dnd.getFolderResource() != null) {

                                if (GSS.get().getFolders().isTrashItem(dnd))

                                        setFiles(new ArrayList<FileResource>());

                                else

                                        setFiles(dnd.getFolderResource().getFiles());

                        } else if (dnd.getTrashResource() != null)

                                setFiles(dnd.getTrashResource().getFiles());

                        else if (dnd.getSharedResource() != null)

                                setFiles(dnd.getSharedResource().getFiles());

                        else if (dnd.getOtherUserResource() != null)

                                setFiles(dnd.getOtherUserResource().getFiles());

                        else

                                setFiles(dnd.getFolderResource().getFiles());

                        update(true);

                        if (!clearSelection && selectedRows.size()==1 && newFilename!=null) {

                                int row = -1;

                                for (int i=1; i < GSS.VISIBLE_FILE_COUNT + 1; ++i) {

                                        if (startIndex + i > folderFileCount)

                                                break;

                                        FileResource file = files.get(startIndex + i - 1);

                                        if (newFilename.equals(file.getName())) {

                                                row = i-1;

                                                break;

                                        }

                                }

                                clearSelectedRows();

                                if (row!=-1)

                                        selectRow(row, true);

                        }

                }

        }

        /**

         * Fill the file cache with data.

         */

        public void setFiles(final List<FileResource> _files) {

                if (_files.size() > 0 && !GSS.get().getFolders().isTrash(GSS.get().getFolders().getCurrent())) {

                        files = new ArrayList<FileResource>();

                        for (FileResource fres : _files)

                                if (!fres.isDeleted())

                                        files.add(fres);

                } else

                        files = _files;

                Collections.sort(files, new Comparator<FileResource>() {

                        @Override

                        public int compare(FileResource arg0, FileResource arg1) {

                                return arg0.getName().compareTo(arg1.getName());

                        }

                });

                folderFileCount = files.size();

        }

        private void sortFiles(final String sortProperty) {

                if (sortProperty.equals(sortingProperty))

                        sortingType = !sortingType;

                else {

                        sortingProperty = sortProperty;

                        sortingType = true;

                }

                update(true);

        }

        private void clearLabels() {

                nameLabel.setText("Name");

                versionLabel.setText("Version");

                sizeLabel.setText("Size");

                dateLabel.setText("Last modified");

                ownerLabel.setText("Owner");

                pathLabel.setText("Path");

        }

        /**

         * Retrieve the table.

         *

         * @return the table

         */

        Grid getTable() {

                return table;

        }

        /**

         * Does the list contains the requested filename

         *

         * @param fileName

         * @return true/false

         */

        public boolean contains(String fileName) {

                for (int i = 0; i < files.size(); i++)

                        if (files.get(i).getName().equals(fileName))

                                return true;

                return false;

        }

        public void clearSelectedRows() {

                for (int r : selectedRows) {

                        int row = r - startIndex;

                        styleRow(row, false);

                }

                selectedRows.clear();

                Object sel = GSS.get().getCurrentSelection();

                if (sel instanceof FileResource || sel instanceof List)

                        GSS.get().setCurrentSelection(null);

        }

        /**

         *

         */

        public void selectAllRows() {

                clearSelectedRows();

                int count = folderFileCount;

                if (count == 0)

                        return;

                int max = startIndex + GSS.VISIBLE_FILE_COUNT;

                if (max > count)

                        max = count;

                int i = 1;

                for (; i < GSS.VISIBLE_FILE_COUNT + 1; ++i) {

                        // Don't read past the end.

                        // if (i > folderFileCount)

                        // break;

                        if (startIndex + i > folderFileCount)

                                break;

                        selectedRows.add(startIndex + i - 1);

                        styleRow(i - 1, true);

                }

                GSS.get().setCurrentSelection(getSelectedFiles());

                contextMenu.setFiles(getSelectedFiles());

                makeRowDraggable(i-1);

        }

        private void makeRowDraggable(int row){

                int contextRow = getWidgetRow(contextMenu, table);

                if (contextRow != -1)

                        table.setWidget(contextRow, 0, getFileIcon(files.get(contextRow - 1)).createImage());

                contextMenu.setWidget(new HTML(getFileIcon(files.get(row - 1)).getHTML()));

                table.setWidget(row, 0, contextMenu);

        }

        private int getWidgetRow(Widget widget, Grid grid) {

                for (int row = 0; row < grid.getRowCount(); row++)

                        for (int col = 0; col < grid.getCellCount(row); col++) {

                                Widget w = table.getWidget(row, col);

                                if (w == widget)

                                        return row;

                        }

                return -1;

        }

}