package gwtupload.client;
import java.util.ArrayList;
import java.util.List;
import com.google.gwt.core.client.JavaScriptObject;
import com.google.gwt.dom.client.InputElement;
import com.google.gwt.user.client.DOM;
import com.google.gwt.user.client.ui.FileUpload;
/**
* Extends GWT's Fileupload class as that one does not support the HTML5 feature of a
* multiple-select uploader.
*
* @author ebluemelhuber
*
*/
public class MultipleFileUpload extends FileUpload {
public MultipleFileUpload() {
super();
// By default multiple is enabled;
enableMultiple(true);
}
public List<String> getFilenames() {
ArrayList<String> result = new ArrayList<String>();
JavaScriptObject rawFileList = getElement().getPropertyJSO("files");
if (rawFileList == null) {
result.add(InputElement.as(getElement()).getValue()); // IE does not support multiple-select
} else {
FileList fileList = rawFileList.cast();
for (int i = 0; i < fileList.getLength(); ++i) {
result.add(fileList.item(i).getName());
}
}
return result;
}
public void enableMultiple(boolean b) {
String attr = "multiple";
if (b) {
DOM.setElementAttribute(getElement(), attr, attr);
} else {
DOM.removeElementAttribute(getElement(), attr);
}
}
public void setAccept(String accept) {
DOM.setElementAttribute(getElement(), "accept", accept);
}
}
class FileList extends JavaScriptObject {
protected FileList() {}
public final native File item(int index) /*-{
return this.item(index);
}-*/;
public final native int getLength() /*-{
return this.length;
}-*/;
}
class File extends JavaScriptObject {
protected File() {}
public final native String getName() /*-{
return this.name;
}-*/;
}