/*
* @see org.eclipse.core.internal.filebuffers.textmanipulation.TextFileBufferOperation#computeTextEdit(org.eclipse.core.filebuffers.ITextFileBuffer, org.eclipse.core.runtime.IProgressMonitor)
*/
protected MultiTextEditWithProgress computeTextEdit(
ITextFileBuffer fileBuffer, IProgressMonitor progressMonitor) throws CoreException {
IDocument document = fileBuffer.getDocument();
int lineCount = document.getNumberOfLines();
progressMonitor = Progress.getMonitor(progressMonitor);
progressMonitor.beginTask(
FileBuffersMessages.RemoveTrailingWhitespaceOperation_task_generatingChanges, lineCount);
try {
MultiTextEditWithProgress multiEdit =
new MultiTextEditWithProgress(
FileBuffersMessages.RemoveTrailingWhitespaceOperation_task_applyingChanges);
for (int i = 0; i < lineCount; i++) {
if (progressMonitor.isCanceled()) throw new OperationCanceledException();
IRegion region = document.getLineInformation(i);
if (region.getLength() == 0) continue;
int lineStart = region.getOffset();
int lineExclusiveEnd = lineStart + region.getLength();
int j = lineExclusiveEnd - 1;
while (j >= lineStart && Character.isWhitespace(document.getChar(j))) --j;
++j;
if (j < lineExclusiveEnd) multiEdit.addChild(new DeleteEdit(j, lineExclusiveEnd - j));
progressMonitor.worked(1);
}
return multiEdit.getChildrenSize() <= 0 ? null : multiEdit;
} catch (BadLocationException x) {
throw new CoreException(
new Status(
IStatus.ERROR,
FileBuffersPlugin.PLUGIN_ID,
IFileBufferStatusCodes.CONTENT_CHANGE_FAILED,
"",
x)); //$NON-NLS-1$
} finally {
progressMonitor.done();
}
}
private void applyTextEdit(
ITextFileBuffer fileBuffer,
MultiTextEditWithProgress textEdit,
IProgressMonitor progressMonitor)
throws CoreException, OperationCanceledException {
try {
textEdit.apply(fileBuffer.getDocument(), TextEdit.NONE, progressMonitor);
} catch (BadLocationException x) {
throw new CoreException(
new Status(
IStatus.ERROR,
FileBuffersPlugin.PLUGIN_ID,
IFileBufferStatusCodes.CONTENT_CHANGE_FAILED,
"",
x)); //$NON-NLS-1$
}
}
