/**
* Copyright 2011 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* 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 org.waveprotocol.wave.client.wavepanel.impl.toolbar.attachment;
import com.google.common.base.Preconditions;
import com.google.gwt.core.client.GWT;
import com.google.gwt.dom.client.StyleInjector;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.resources.client.ClientBundle;
import com.google.gwt.resources.client.CssResource;
import com.google.gwt.resources.client.ImageResource;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiField;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.FileUpload;
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.SubmitEvent;
import com.google.gwt.user.client.ui.HTMLPanel;
import com.google.gwt.user.client.ui.Hidden;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Image;
import com.google.gwt.user.client.ui.Label;
import org.waveprotocol.wave.client.wavepanel.view.AttachmentPopupView;
import org.waveprotocol.wave.client.widget.popup.CenterPopupPositioner;
import org.waveprotocol.wave.client.widget.popup.PopupChrome;
import org.waveprotocol.wave.client.widget.popup.PopupChromeFactory;
import org.waveprotocol.wave.client.widget.popup.PopupEventListener;
import org.waveprotocol.wave.client.widget.popup.PopupEventSourcer;
import org.waveprotocol.wave.client.widget.popup.PopupFactory;
import org.waveprotocol.wave.client.widget.popup.UniversalPopup;
import org.waveprotocol.wave.media.model.AttachmentId;
/**
* Widget implementation of the {@link AttachmentPopupView}.
*
* @author yurize@apache.org (Yuri Zelikov)
*/
public final class AttachmentPopupWidget extends Composite implements AttachmentPopupView,
PopupEventListener {
interface Binder extends UiBinder<HTMLPanel, AttachmentPopupWidget> {
}
/** Resources used by this widget. */
public interface Resources extends ClientBundle {
/** CSS */
@Source("AttachmentPopupWidget.css")
Style style();
@Source("spinner.gif")
ImageResource spinner();
}
interface Style extends CssResource {
String self();
String title();
String spinnerPanel();
String spinner();
String status();
String error();
String done();
}
private final static Binder BINDER = GWT.create(Binder.class);
@UiField(provided = true)
final static Style style = GWT.<Resources> create(Resources.class).style();
private static final String UPLOAD_ACTION_URL = "/attachment/";
static {
// StyleInjector's default behaviour of deferred injection messes up
// popups, which do synchronous layout queries for positioning. Therefore,
// we force synchronous injection.
StyleInjector.inject(style.getText(), true);
}
@UiField
FileUpload fileUpload;
@UiField
Button uploadBtn;
@UiField
FormPanel form;
@UiField
Hidden formAttachmentId;
@UiField
Hidden formWaveRef;
@UiField
HorizontalPanel spinnerPanel;
@UiField
Label status;
@UiField
Image spinnerImg;
/** Popup containing this widget. */
private final UniversalPopup popup;
/** Optional listener for view events. */
private Listener listener;
private AttachmentId attachmentId;
private String waveRefStr;
/**
* Creates link info popup.
*/
public AttachmentPopupWidget() {
initWidget(BINDER.createAndBindUi(this));
// Because we're going to add a FileUpload widget, we'll need to set the
// form to use the POST method, and multipart MIME encoding.
form.setEncoding(FormPanel.ENCODING_MULTIPART);
form.setMethod(FormPanel.METHOD_POST);
// Add an event handler to the form.
form.addSubmitHandler(new FormPanel.SubmitHandler() {
@Override
public void onSubmit(SubmitEvent event) {
// No implementation.
}
});
form.addSubmitCompleteHandler(new FormPanel.SubmitCompleteHandler() {
@Override
public void onSubmitComplete(SubmitCompleteEvent event) {
// When the form submission is successfully completed, this
// event is fired. Assuming the service returned a response of type
// text/html, we can get the result text here (see the FormPanel
// documentation for further explanation).
spinnerImg.setVisible(false);
String results = event.getResults();
if (results != null && results.contains("OK")) {
status.setText("Done!");
status.addStyleName(style.done());
listener.onDone(waveRefStr, attachmentId.getId(), fileUpload.getFilename());
hide();
} else {
status.setText("Error!");
status.addStyleName(style.error());
}
}
});
uploadBtn.addClickHandler(new ClickHandler() {
@Override
public void onClick(ClickEvent event) {
String filename = fileUpload.getFilename();
if (filename.length() == 0) {
Window.alert("No file to upload!");
} else {
spinnerPanel.setVisible(true);
formAttachmentId.setValue(attachmentId.getId());
formWaveRef.setValue(waveRefStr);
form.submit();
}
}
});
// Wrap in a popup.
PopupChrome chrome = PopupChromeFactory.createPopupChrome();
popup = PopupFactory.createPopup(null, new CenterPopupPositioner(), chrome, true);
popup.add(this);
popup.addPopupEventListener(this);
}
@Override
public void init(Listener listener) {
Preconditions.checkState(this.listener == null);
Preconditions.checkArgument(listener != null);
this.listener = listener;
}
@Override
public void reset() {
Preconditions.checkState(this.listener != null);
this.listener = null;
}
@Override
public void show() {
Preconditions.checkState(this.attachmentId != null);
form.setAction(UPLOAD_ACTION_URL + attachmentId.getId());
spinnerPanel.setVisible(false);
popup.show();
}
@Override
public void hide() {
popup.hide();
}
@Override
public void onShow(PopupEventSourcer source) {
if (listener != null) {
listener.onShow();
}
}
@Override
public void onHide(PopupEventSourcer source) {
if (listener != null) {
listener.onHide();
}
}
@Override
public void setAttachmentId(AttachmentId id) {
attachmentId = id;
}
@Override
public void setWaveRef(String waveRefStr) {
this.waveRefStr = waveRefStr;
}
}