package org.latexlab.docs.client.content.menus;
import org.latexlab.docs.client.commands.SystemPasteCommand;
import org.latexlab.docs.client.content.icons.Icons;
import org.latexlab.docs.client.widgets.DynamicMenuBar;
import com.google.gwt.core.client.GWT;
import com.google.gwt.core.client.RunAsyncCallback;
import com.google.gwt.user.client.rpc.AsyncCallback;
/**
* Contains a Code Environment menu with on-demand loading.
*/
public class DynamicCodeEnvironmentMenu extends DynamicMenuBar {
protected static DynamicCodeEnvironmentMenu instance;
/**
* Retrieves the single instance of this class.
*/
public static DynamicCodeEnvironmentMenu get() {
if (instance == null) {
instance = new DynamicCodeEnvironmentMenu();
}
return instance;
}
/**
* Constructs a code Environment menu.
*/
protected DynamicCodeEnvironmentMenu() {
super(true);
}
/**
* Asynchronously loads the MenuBar's sub items.
*
* @param callback the callback carrying the sub items
*/
@Override
protected void getSubMenu(final AsyncCallback<ExtendedMenuItem[]> callback) {
GWT.runAsync(new RunAsyncCallback() {
@Override
public void onFailure(Throwable reason) {
callback.onFailure(reason);
}
@Override
public void onSuccess() {
callback.onSuccess(new ExtendedMenuItem[] {
new ExtendedMenuItem(Icons.editorIcons.Blank(), "Code", new SystemPasteCommand("\\begin{verbatim}\n\\end{verbatim}")),
new ExtendedMenuItem(Icons.editorIcons.Blank(), "Code with visible White Spaces", new SystemPasteCommand("\\begin{verbatim*}\n\\end{verbatim*}")),
new ExtendedMenuItem(Icons.editorIcons.Blank(), "Embedded Code", new SystemPasteCommand("\\verb||")),
new ExtendedMenuItem(Icons.editorIcons.Blank(), "Embedded Code with visible White Spaces", new SystemPasteCommand("\\verb*||"))
});
}
});
}
}