org.rstudio.core.client.widget.HtmlFormModalDialog.java Source code

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Here is the source code for org.rstudio.core.client.widget.HtmlFormModalDialog.java

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/*
 * HtmlFormModalDialog.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.widget;

import com.google.gwt.core.client.JavaScriptException;
import com.google.gwt.core.client.Scheduler;
import com.google.gwt.core.client.Scheduler.ScheduledCommand;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.user.client.ui.FormPanel;
import com.google.gwt.user.client.ui.FormPanel.SubmitCompleteEvent;
import com.google.gwt.user.client.ui.FormPanel.SubmitCompleteHandler;
import com.google.gwt.user.client.ui.FormPanel.SubmitEvent;
import com.google.gwt.user.client.ui.FormPanel.SubmitHandler;
import org.rstudio.core.client.Debug;
import org.rstudio.core.client.StringUtil;

public abstract class HtmlFormModalDialog<T> extends ModalDialogBase {
    public HtmlFormModalDialog(String title, final String progressMessage, String actionURL,
            final OperationWithInput<T> operation) {
        super(new FormPanel());
        setText(title);

        final FormPanel formPanel = (FormPanel) getContainerPanel();
        formPanel.getElement().getStyle().setProperty("margin", "0px");
        formPanel.getElement().getStyle().setProperty("padding", "0px");
        formPanel.setAction(actionURL);
        setFormPanelEncodingAndMethod(formPanel);

        final ProgressIndicator progressIndicator = addProgressIndicator();

        ThemedButton okButton = new ThemedButton("OK", new ClickHandler() {
            public void onClick(ClickEvent event) {
                try {
                    formPanel.submit();
                } catch (final JavaScriptException e) {
                    Scheduler.get().scheduleDeferred(new ScheduledCommand() {
                        public void execute() {
                            if ("Access is denied.".equals(StringUtil.notNull(e.getDescription()).trim())) {
                                progressIndicator.onError("Please use a complete file path.");
                            } else {
                                Debug.log(e.toString());
                                progressIndicator.onError(e.getDescription());
                            }
                        }
                    });
                } catch (final Exception e) {
                    Scheduler.get().scheduleDeferred(new ScheduledCommand() {
                        public void execute() {
                            Debug.log(e.toString());
                            progressIndicator.onError(e.getMessage());
                        }
                    });
                }
            }
        });
        addOkButton(okButton);
        addCancelButton();

        formPanel.addSubmitHandler(new SubmitHandler() {
            public void onSubmit(SubmitEvent event) {
                if (validate()) {
                    progressIndicator.onProgress(progressMessage);
                } else {
                    event.cancel();
                }
            }
        });

        formPanel.addSubmitCompleteHandler(new SubmitCompleteHandler() {
            public void onSubmitComplete(SubmitCompleteEvent event) {

                String resultsText = event.getResults();
                if (resultsText != null) {
                    try {
                        T results = parseResults(resultsText);
                        progressIndicator.onCompleted();
                        operation.execute(results);
                    } catch (Exception e) {
                        progressIndicator.onError(e.getMessage());
                    }
                } else {
                    progressIndicator.onError("Unexpected empty response from server");
                }
            }
        });
    }

    protected void setFormPanelEncodingAndMethod(FormPanel formPanel) {
        formPanel.setEncoding(FormPanel.ENCODING_URLENCODED);
        formPanel.setMethod(FormPanel.METHOD_POST);
    }

    protected abstract boolean validate();

    protected abstract T parseResults(String results) throws Exception;
}