/** Cancel upload process and show an error message to the user. */
private void cancelUpload(String msg) {
successful = false;
uploadFinished();
if (fileInput instanceof IDragAndDropFileInput) {
((IDragAndDropFileInput) fileInput).reset();
}
statusWidget.setStatus(IUploadStatus.Status.ERROR);
statusWidget.setError(msg);
}
/** Adds a file to the upload queue. */
private void addToQueue() {
statusWidget.setStatus(IUploadStatus.Status.QUEUED);
statusWidget.setProgress(0, 0);
if (!fileQueue.contains(getInputName())) {
onStartUpload();
fileQueue.add(getInputName());
if (!multiple && avoidRepeatedFiles) {
fileUploading.add(getFileName());
}
}
}
private boolean validateExtension(String filename) {
if (filename == null || filename.length() == 0) {
return !avoidEmptyFile;
}
boolean valid = Utils.validateExtension(validExtensions, filename);
if (!valid) {
finished = true;
statusWidget.setError(i18nStrs.uploaderInvalidExtension() + validExtensionsMsg);
statusWidget.setStatus(Status.INVALID);
}
return valid;
}
/**
* Called when the uploader detects that the upload process has finished: - in the case of submit
* complete. - in the case of error talking with the server.
*/
private void uploadFinished() {
removeFromQueue();
finished = true;
uploading = false;
updateStatusTimer.cancel();
statusWidget.setVisible(false);
if (successful) {
if (avoidRepeatedFiles) {
fileDone.addAll(fileInput.getFilenames());
statusWidget.setStatus(IUploadStatus.Status.SUCCESS);
} else {
statusWidget.setStatus(IUploadStatus.Status.SUCCESS);
}
} else if (canceled) {
statusWidget.setStatus(IUploadStatus.Status.CANCELED);
} else {
statusWidget.setStatus(IUploadStatus.Status.ERROR);
}
onFinishUpload();
reatachIframe(uploadForm.getElement().getAttribute("target"));
}
/** Cancel the current upload process. */
public void cancel() {
if (getStatus() == Status.UNINITIALIZED) {
return;
}
if (finished && !uploading) {
if (successful) {
try {
sendAjaxRequestToDeleteUploadedFile();
} catch (Exception e) {
}
} else {
statusWidget.setStatus(Status.DELETED);
}
return;
}
if (canceled || getStatus() == Status.CANCELING) {
return;
}
canceled = true;
automaticUploadTimer.cancel();
if (uploading) {
updateStatusTimer.cancel();
try {
sendAjaxRequestToCancelCurrentUpload();
} catch (Exception e) {
log("Exception cancelling request " + e.getMessage(), e);
}
statusWidget.setStatus(IUploadStatus.Status.CANCELING);
} else {
uploadFinished();
reuse();
}
}
/** Prepare the uploader for a new upload. */
public void reuse() {
this.uploadForm.reset();
updateStatusTimer.cancel();
onSubmitComplete = uploading = canceled = finished = successful = false;
statusWidget.setStatus(Status.UNINITIALIZED);
}
/**
* Method called when the file input has changed. This happens when the user selects a file.
*
* <p>Override this method if you want to add a customized behavior, but remember to call this in
* your function
*/
protected void onChangeInput() {
statusWidget.setStatus(Status.CHANGED);
for (IUploader.OnChangeUploaderHandler handler : onChangeHandlers) {
handler.onChange(this);
}
}
