@Override public void actionPerformed(ActionEvent arg0) { if (arg0.getSource().equals(okButton)) { cfg.setProperty(ReplacementProperty.REPLACEMENT_ENABLE, enableReplacement.isSelected()); cfg.setProperty( ReplacementProperty.REPLACEMENT_PROPOSAL, enableReplacementProposal.isSelected()); SwingWorker worker = new SwingWorker() { /** * Called on the event dispatching thread (not on the worker thread) after the <code> * construct</code> method has returned. */ @Override public void finished() { String newChatString = (String) get(); if (newChatString != null) { try { Element elem = chatPanel.document.getElement(currentMessageID); chatPanel.document.setOuterHTML(elem, newChatString); msgIDToChatString.put(currentMessageID, newChatString); } catch (BadLocationException ex) { logger.error("Could not replace chat message", ex); } catch (IOException ex) { logger.error("Could not replace chat message", ex); } } } @Override protected Object construct() throws Exception { String newChatString = msgIDToChatString.get(currentMessageID); try { String originalLink = msgIDandPositionToLink.get(currentMessageID + "#" + currentLinkPosition); String replacementLink = linkToReplacement.get(originalLink); String replacement; DirectImageReplacementService source = GuiActivator.getDirectImageReplacementSource(); if (originalLink.equals(replacementLink) && (!source.isDirectImage(originalLink) || source.getImageSize(originalLink) == -1)) { replacement = originalLink; } else { replacement = "<IMG HEIGHT=\"90\" WIDTH=\"120\" SRC=\"" + replacementLink + "\" BORDER=\"0\" ALT=\"" + originalLink + "\"></IMG>"; } String old = originalLink + "</A> <A href=\"jitsi://" + ShowPreviewDialog.this.getClass().getName() + "/SHOWPREVIEW?" + currentMessageID + "#" + currentLinkPosition + "\">" + GuiActivator.getResources().getI18NString("service.gui.SHOW_PREVIEW"); newChatString = newChatString.replace(old, replacement); } catch (Exception ex) { logger.error("Could not replace chat message", ex); } return newChatString; } }; worker.start(); this.setVisible(false); } else if (arg0.getSource().equals(cancelButton)) { this.setVisible(false); } }