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/*
* Vaadin Framework 7
*
* Copyright (C) 2000-2024 Vaadin Ltd
*
* This program is available under Vaadin Commercial License and Service Terms.
*
* See for the full
* license.
*/
package com.vaadin.ui;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import org.jsoup.nodes.Element;
import com.vaadin.event.Transferable;
import com.vaadin.event.TransferableImpl;
import com.vaadin.event.dd.DragSource;
import com.vaadin.event.dd.DropHandler;
import com.vaadin.event.dd.DropTarget;
import com.vaadin.event.dd.TargetDetails;
import com.vaadin.event.dd.TargetDetailsImpl;
import com.vaadin.server.PaintException;
import com.vaadin.server.PaintTarget;
import com.vaadin.server.StreamVariable;
import com.vaadin.shared.MouseEventDetails;
import com.vaadin.shared.ui.dd.HorizontalDropLocation;
import com.vaadin.shared.ui.dd.VerticalDropLocation;
import com.vaadin.shared.ui.draganddropwrapper.DragAndDropWrapperConstants;
import com.vaadin.shared.ui.draganddropwrapper.DragAndDropWrapperServerRpc;
import com.vaadin.ui.declarative.DesignContext;
@SuppressWarnings("serial")
public class DragAndDropWrapper extends CustomComponent
implements DropTarget, DragSource, LegacyComponent {
public class WrapperTransferable extends TransferableImpl {
private Html5File[] files;
public WrapperTransferable(Component sourceComponent,
Map rawVariables) {
super(sourceComponent, rawVariables);
Integer fc = (Integer) rawVariables.get("filecount");
if (fc != null) {
files = new Html5File[fc];
for (int i = 0; i < fc; i++) {
Html5File file = new Html5File(
(String) rawVariables.get("fn" + i), // name
((Double) rawVariables.get("fs" + i)).longValue(), // size
(String) rawVariables.get("ft" + i)); // mime
String id = (String) rawVariables.get("fi" + i);
files[i] = file;
receivers.put(id, new ProxyReceiver(id, file));
markAsDirty(); // paint Receivers
}
}
}
/**
* The component in wrapper that is being dragged or null if the
* transferable is not a component (most likely an html5 drag).
*
* @return
*/
public Component getDraggedComponent() {
Component object = (Component) getData("component");
return object;
}
/**
* @return the mouse down event that started the drag and drop operation
*/
public MouseEventDetails getMouseDownEvent() {
return MouseEventDetails.deSerialize((String) getData("mouseDown"));
}
public Html5File[] getFiles() {
return files;
}
public String getText() {
String data = (String) getData("Text"); // IE, html5
if (data == null) {
// check for "text/plain" (webkit)
data = (String) getData("text/plain");
}
return data;
}
public String getHtml() {
String data = (String) getData("Html"); // IE, html5
if (data == null) {
// check for "text/plain" (webkit)
data = (String) getData("text/html");
}
return data;
}
}
private final DragAndDropWrapperServerRpc rpc = new DragAndDropWrapperServerRpc() {
@Override
public void poll() {
// #19616 RPC to poll the server for changes
}
};
private Map receivers = new HashMap();
public class WrapperTargetDetails extends TargetDetailsImpl {
public WrapperTargetDetails(Map rawDropData) {
super(rawDropData, DragAndDropWrapper.this);
}
/**
* @return the absolute position of wrapper on the page
*/
public Integer getAbsoluteLeft() {
return (Integer) getData("absoluteLeft");
}
/**
*
* @return the absolute position of wrapper on the page
*/
public Integer getAbsoluteTop() {
return (Integer) getData("absoluteTop");
}
/**
* @return a detail about the drags vertical position over the wrapper.
*/
public VerticalDropLocation getVerticalDropLocation() {
return VerticalDropLocation
.valueOf((String) getData("verticalLocation"));
}
/**
* @return a detail about the drags horizontal position over the
* wrapper.
*/
public HorizontalDropLocation getHorizontalDropLocation() {
return HorizontalDropLocation
.valueOf((String) getData("horizontalLocation"));
}
}
public enum DragStartMode {
/**
* {@link DragAndDropWrapper} does not start drag events at all
*/
NONE,
/**
* The component on which the drag started will be shown as drag image.
*/
COMPONENT,
/**
* The whole wrapper is used as a drag image when dragging.
*/
WRAPPER,
/**
* The whole wrapper is used to start an HTML5 drag.
*
* NOTE: In Internet Explorer 6 to 8, this prevents user interactions
* with the wrapper's contents. For example, clicking a button inside
* the wrapper will no longer work.
*/
HTML5,
/**
* Uses the component defined in
* {@link #setDragImageComponent(Component)} as the drag image.
*/
COMPONENT_OTHER,
}
private final Map html5DataFlavors = new LinkedHashMap();
private DragStartMode dragStartMode = DragStartMode.NONE;
private Component dragImageComponent = null;
private Set sentIds = new HashSet();
/**
* This is an internal constructor. Use
* {@link DragAndDropWrapper#DragAndDropWrapper(Component)} instead.
*
* @since 7.5.0
*/
@Deprecated
public DragAndDropWrapper() {
super();
registerRpc(rpc);
}
/**
* Wraps given component in a {@link DragAndDropWrapper}.
*
* @param root
* the component to be wrapped
*/
public DragAndDropWrapper(Component root) {
this();
setCompositionRoot(root);
}
/**
* Sets data flavors available in the DragAndDropWrapper is used to start an
* HTML5 style drags. Most commonly the "Text" flavor should be set.
* Multiple data types can be set.
*
* @param type
* the string identifier of the drag "payload". E.g. "Text" or
* "text/html"
* @param value
* the value
*/
public void setHTML5DataFlavor(String type, Object value) {
html5DataFlavors.put(type, value);
markAsDirty();
}
@Override
public void changeVariables(Object source, Map variables) {
// TODO Remove once LegacyComponent is no longer implemented
}
@Override
public void paintContent(PaintTarget target) throws PaintException {
target.addAttribute(DragAndDropWrapperConstants.DRAG_START_MODE,
dragStartMode.ordinal());
if (dragStartMode.equals(DragStartMode.COMPONENT_OTHER)) {
if (dragImageComponent != null) {
target.addAttribute(
DragAndDropWrapperConstants.DRAG_START_COMPONENT_ATTRIBUTE,
dragImageComponent.getConnectorId());
} else {
throw new IllegalArgumentException(
"DragStartMode.COMPONENT_OTHER set but no component "
+ "was defined. Please set a component using DragAnd"
+ "DropWrapper.setDragStartComponent(Component).");
}
}
if (getDropHandler() != null) {
getDropHandler().getAcceptCriterion().paint(target);
}
if (receivers != null && receivers.size() > 0) {
for (Iterator> it = receivers
.entrySet().iterator(); it.hasNext();) {
Entry entry = it.next();
String id = entry.getKey();
ProxyReceiver proxyReceiver = entry.getValue();
Html5File html5File = proxyReceiver.file;
if (html5File.getStreamVariable() != null) {
if (!sentIds.contains(id)) {
target.addVariable(this, "rec-" + id,
new ProxyReceiver(id, html5File));
/*
* if a new batch is requested to be uploaded before the
* last one is done, any remaining ids will be replayed.
* We want to avoid a new ProxyReceiver to be made since
* it'll get a new URL, so we need to keep extra track
* on what has been sent.
*
* See #12330.
*/
sentIds.add(id);
// these are cleaned from receivers once the upload has
// started
}
} else {
// instructs the client side not to send the file
target.addVariable(this, "rec-" + id, (String) null);
// forget the file from subsequent paints
it.remove();
}
}
}
target.addAttribute(DragAndDropWrapperConstants.HTML5_DATA_FLAVORS,
html5DataFlavors);
}
private DropHandler dropHandler;
@Override
public DropHandler getDropHandler() {
return dropHandler;
}
public void setDropHandler(DropHandler dropHandler) {
this.dropHandler = dropHandler;
markAsDirty();
}
@Override
public TargetDetails translateDropTargetDetails(
Map clientVariables) {
return new WrapperTargetDetails(clientVariables);
}
@Override
public Transferable getTransferable(
final Map rawVariables) {
return new WrapperTransferable(this, rawVariables);
}
public void setDragStartMode(DragStartMode dragStartMode) {
this.dragStartMode = dragStartMode;
markAsDirty();
}
public DragStartMode getDragStartMode() {
return dragStartMode;
}
/**
* Sets the component that will be used as the drag image. Only used when
* wrapper is set to {@link DragStartMode#COMPONENT_OTHER}
*
* @param dragImageComponent
*/
public void setDragImageComponent(Component dragImageComponent) {
this.dragImageComponent = dragImageComponent;
markAsDirty();
}
/**
* Gets the component that will be used as the drag image. Only used when
* wrapper is set to {@link DragStartMode#COMPONENT_OTHER}
*
* @return null if no component is set.
*/
public Component getDragImageComponent() {
return dragImageComponent;
}
final class ProxyReceiver implements StreamVariable {
private String id;
private Html5File file;
public ProxyReceiver(String id, Html5File file) {
this.id = id;
this.file = file;
}
private boolean listenProgressOfUploadedFile;
@Override
public OutputStream getOutputStream() {
if (file.getStreamVariable() == null) {
return null;
}
return file.getStreamVariable().getOutputStream();
}
@Override
public boolean listenProgress() {
return file.getStreamVariable().listenProgress();
}
@Override
public void onProgress(StreamingProgressEvent event) {
file.getStreamVariable()
.onProgress(new ReceivingEventWrapper(event));
}
@Override
public void streamingStarted(StreamingStartEvent event) {
listenProgressOfUploadedFile = file.getStreamVariable() != null;
if (listenProgressOfUploadedFile) {
file.getStreamVariable()
.streamingStarted(new ReceivingEventWrapper(event));
}
// no need tell to the client about this receiver on next paint
receivers.remove(id);
sentIds.remove(id);
// let the terminal GC the streamvariable and not to accept other
// file uploads to this variable
event.disposeStreamVariable();
}
@Override
public void streamingFinished(StreamingEndEvent event) {
if (listenProgressOfUploadedFile) {
file.getStreamVariable()
.streamingFinished(new ReceivingEventWrapper(event));
}
}
@Override
public void streamingFailed(final StreamingErrorEvent event) {
if (listenProgressOfUploadedFile) {
file.getStreamVariable()
.streamingFailed(new ReceivingEventWrapper(event));
}
}
@Override
public boolean isInterrupted() {
return file.getStreamVariable().isInterrupted();
}
/*
* With XHR2 file posts we can't provide as much information from the
* terminal as with multipart request. This helper class wraps the
* terminal event and provides the lacking information from the
* Html5File.
*/
class ReceivingEventWrapper implements StreamingErrorEvent,
StreamingEndEvent, StreamingStartEvent, StreamingProgressEvent {
private StreamingEvent wrappedEvent;
ReceivingEventWrapper(StreamingEvent e) {
wrappedEvent = e;
}
@Override
public String getMimeType() {
return file.getType();
}
@Override
public String getFileName() {
return file.getFileName();
}
@Override
public long getContentLength() {
return file.getFileSize();
}
public StreamVariable getReceiver() {
return ProxyReceiver.this;
}
@Override
public Exception getException() {
if (wrappedEvent instanceof StreamingErrorEvent) {
return ((StreamingErrorEvent) wrappedEvent).getException();
}
return null;
}
@Override
public long getBytesReceived() {
return wrappedEvent.getBytesReceived();
}
/**
* Calling this method has no effect. DD files are receive only once
* anyway.
*/
@Override
public void disposeStreamVariable() {
}
}
}
@Override
public void readDesign(Element design, DesignContext designContext) {
super.readDesign(design, designContext);
for (Element child : design.children()) {
Component component = designContext.readDesign(child);
if (getDragStartMode() == DragStartMode.COMPONENT_OTHER
&& child.hasAttr(":drag-image")) {
setDragImageComponent(component);
} else if (getCompositionRoot() == null) {
setCompositionRoot(component);
}
}
}
@Override
public void writeDesign(Element design, DesignContext designContext) {
super.writeDesign(design, designContext);
design.appendChild(designContext.createElement(getCompositionRoot()));
if (getDragStartMode() == DragStartMode.COMPONENT_OTHER) {
Element child = designContext
.createElement(getDragImageComponent());
child.attr(":drag-image", true);
design.appendChild(child);
}
}
}
