/* 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.activiti.explorer.ui.content;
import org.activiti.engine.ProcessEngines;
import org.activiti.engine.TaskService;
import org.activiti.engine.task.Attachment;
import org.activiti.explorer.ExplorerApp;
import org.activiti.explorer.I18nManager;
import org.activiti.explorer.Messages;
import org.activiti.explorer.ui.Images;
import org.activiti.explorer.ui.content.file.FileAttachmentEditorComponent;
import org.activiti.explorer.ui.mainlayout.ExplorerLayout;
import org.activiti.explorer.ui.util.InputStreamStreamSource;
import com.vaadin.terminal.ExternalResource;
import com.vaadin.terminal.Resource;
import com.vaadin.terminal.StreamResource;
import com.vaadin.ui.Button;
import com.vaadin.ui.Button.ClickEvent;
import com.vaadin.ui.Button.ClickListener;
import com.vaadin.ui.Component;
import com.vaadin.ui.Embedded;
import com.vaadin.ui.HorizontalLayout;
import com.vaadin.ui.Label;
import com.vaadin.ui.Link;
import com.vaadin.ui.VerticalLayout;
import com.vaadin.ui.themes.Reindeer;
/**
* @author Frederik Heremans
*/
public class GenericAttachmentRenderer implements AttachmentRenderer {
public boolean canRenderAttachment(String type) {
// Render everything
return true;
}
public String getName(I18nManager i18nManager) {
return i18nManager.getMessage(Messages.RELATED_CONTENT_TYPE_FILE);
}
public Resource getImage(Attachment attachment) {
return Images.RELATED_CONTENT_FILE;
}
public Component getOverviewComponent(final Attachment attachment, final RelatedContentComponent parent) {
Button attachmentLink = new Button(attachment.getName());
attachmentLink.addStyleName(Reindeer.BUTTON_LINK);
attachmentLink.addListener(new ClickListener() {
private static final long serialVersionUID = 1L;
public void buttonClick(ClickEvent event) {
parent.showAttachmentDetail(attachment);
}
});
return attachmentLink;
}
public Component getDetailComponent(Attachment attachment) {
VerticalLayout verticalLayout = new VerticalLayout();
verticalLayout.setSizeUndefined();
verticalLayout.setSpacing(true);
verticalLayout.setMargin(true);
Label description = new Label(attachment.getDescription());
description.setSizeUndefined();
verticalLayout.addComponent(description);
HorizontalLayout linkLayout = new HorizontalLayout();
linkLayout.setSpacing(true);
verticalLayout.addComponent(linkLayout);
// Image
linkLayout.addComponent(new Embedded(null, getImage(attachment)));
// Link
Link link = null;
if(attachment.getUrl() != null) {
link = new Link(attachment.getUrl(), new ExternalResource(attachment.getUrl()));
} else {
TaskService taskService = ProcessEngines.getDefaultProcessEngine().getTaskService();
Resource res = new StreamResource(new InputStreamStreamSource(taskService.getAttachmentContent(attachment.getId())),
attachment.getName() + extractExtention(attachment.getType()),ExplorerApp.get());
link = new Link(attachment.getName(), res);
}
// Set generic image and external window
link.setTargetName(ExplorerLayout.LINK_TARGET_BLANK);
linkLayout.addComponent(link);
return verticalLayout;
}
protected String extractExtention(String type) {
// Check if the extention is appended at the end
int lastIndex = type.lastIndexOf(FileAttachmentEditorComponent.MIME_TYPE_EXTENTION_SPLIT_CHAR);
if(lastIndex > 0 && lastIndex < type.length() - 1) {
return "." + type.substring(lastIndex + 1);
}
// No extention added to end of mime-type, used second part of mime-type (eg. image/png -> .png)
lastIndex = type.lastIndexOf('/');
if(lastIndex > 0 && lastIndex < type.length() - 1) {
return "." + type.substring(lastIndex + 1);
}
return "." + type;
}
}