// implemented for ActionListener event handling
public void actionPerformed(ActionEvent e) {
String actionCmd = e.getActionCommand();
Stack locStack = parentBrowserFrame.locationStack;
Stack fwdStack = parentBrowserFrame.forwardStack;
if (actionCmd.equals(homeCmd)) // event from home button
{
fwdStack.removeAllElements();
parentBrowserFrame.setBrowserLocation(mainBrowserURL);
} else if (actionCmd.equals(backCmd)) // event from back button
{
if (!locStack.isEmpty()) {
String myLocale = (String) (locStack.pop());
// push current location on forward stack
fwdStack.push(location);
getForwardButton().setEnabled(true);
// do *not* cache the last location in the stack
parentBrowserFrame.setBrowserLocation(myLocale, false);
}
} else if (actionCmd.equals(forwardCmd)) // event from forward button
{
if (!fwdStack.isEmpty()) {
// remove location from forward stack
String newLoc = (String) (fwdStack.pop());
// DO add the current location to the back stack
parentBrowserFrame.setBrowserLocation(newLoc);
}
} else if (actionCmd.equals(comboCmd)) // event from URL combo box!
{
if (e.getSource() instanceof JComboBox) // just to be sure
{
JComboBox thisBox = (JComboBox) e.getSource();
String newLoc = thisBox.getSelectedItem().toString();
if (newLoc != null && !newLoc.equals("")) // ignore empty selections
{
if (thisBox.getSelectedIndex() == -1) {
thisBox.insertItemAt(newLoc, 0);
}
fwdStack.removeAllElements();
parentBrowserFrame.setBrowserLocation(newLoc);
}
}
}
// disable the back button if we find the location stack is empty
if (locStack.isEmpty()) {
getBackButton().setEnabled(false);
}
// disable forward button if forward stack is empty
if (fwdStack.isEmpty()) {
getForwardButton().setEnabled(false);
}
}
public void setRootNode(NodeImpl node) {
if (!(node instanceof HTMLElementImpl)) {
throw new IllegalArgumentException("node=" + node);
}
HTMLElementImpl element = (HTMLElementImpl) node;
HtmlRendererContext context = element.getHtmlRendererContext();
this.htmlContext = context;
if (context != null) {
String rows = element.getAttribute("rows");
String cols = element.getAttribute("cols");
HtmlLength[] rowLengths = this.getLengths(rows);
HtmlLength[] colLengths = this.getLengths(cols);
this.rowHtmlLengths = rowLengths;
this.colHtmlLengths = colLengths;
HTMLElementImpl[] subframes = this.getSubFrames(element);
Component[] frameComponents = new Component[subframes.length];
this.frameComponents = frameComponents;
for (int i = 0; i < subframes.length; i++) {
HTMLElementImpl frameElement = subframes[i];
if (frameElement != null && "FRAMESET".equalsIgnoreCase(frameElement.getTagName())) {
FrameSetPanel fsp = new FrameSetPanel();
fsp.setRootNode(frameElement);
frameComponents[i] = fsp;
} else {
BrowserFrame frame = context.createBrowserFrame();
if (frameElement != null) {
String src = frameElement.getAttribute("src");
if (src != null) {
java.net.URL url;
try {
url = frameElement.getFullURL(src);
if (url != null) {
frame.loadURL(url);
}
} catch (MalformedURLException mfu) {
// ignore
}
}
}
frameComponents[i] = frame.getComponent();
}
}
}
}