Method revert

ij/src/main/java/ij/ImagePlus.java:2406–2443

Implements the File/Revert command.

()

	/** Implements the File/Revert command. */
	public void revert() {
		if (getStackSize()>1 && getStack().isVirtual()) {
			int thisSlice = currentSlice;
			currentSlice = 0;
			setSlice(thisSlice);
			return;
		}
		FileInfo fi = getOriginalFileInfo();
		boolean isFileInfo = fi!=null && fi.fileFormat!=FileInfo.UNKNOWN;
		if (!isFileInfo && url==null)
			return;
		if (fi.directory==null && url==null)
			return;
		if (ij!=null && changes && isFileInfo && !Interpreter.isBatchMode() && !IJ.isMacro() && !IJ.altKeyDown()) {
			if (!IJ.showMessageWithCancel("Revert?", "Revert to saved version of\n\""+getTitle()+"\"?"))
				return;
		}
		Roi saveRoi = null;
		if (roi!=null) {
			roi.endPaste();
			saveRoi = (Roi)roi.clone();
		}
		trimProcessor();
		new FileOpener(fi).revertToSaved(this);
		if (Prefs.useInvertingLut && getBitDepth()==8 && ip!=null && !ip.isInvertedLut()&& !ip.isColorLut())
			invertLookupTable();
		if (getProperty("FHT")!=null) {
			properties.remove("FHT");
			if (getTitle().startsWith("FFT of "))
				setTitle(getTitle().substring(7));
		}
		ContrastAdjuster.update();
		if (saveRoi!=null) setRoi(saveRoi);
		repaintWindow();
		IJ.showStatus("");
		changes = false;
		notifyListeners(UPDATED);
    }

	void revertStack(FileInfo fi) {
		String path = null;