public void actionPerformed(AnActionEvent e) {
final DataContext dc = e.getDataContext();
if ((!isVisible(dc)) || (!isEnabled(dc))) return;
final Project project = CommonDataKeys.PROJECT.getData(dc);
final Iterable<Pair<VirtualFilePointer, FileStatus>> iterable =
VcsDataKeys.UPDATE_VIEW_FILES_ITERABLE.getData(dc);
final Label before = (Label) VcsDataKeys.LABEL_BEFORE.getData(dc);
final Label after = (Label) VcsDataKeys.LABEL_AFTER.getData(dc);
final String selectedUrl = VcsDataKeys.UPDATE_VIEW_SELECTED_PATH.getData(dc);
ShowDiffAction.showDiffForChange(
new MyIterableWrapper(iterable.iterator(), before, after),
new MySelectionMarker(selectedUrl),
project,
new ShowDiffUIContext(true));
}
private boolean isVisible(final DataContext dc) {
final Project project = CommonDataKeys.PROJECT.getData(dc);
return (project != null)
&& (VcsDataKeys.LABEL_BEFORE.getData(dc) != null)
&& (VcsDataKeys.LABEL_AFTER.getData(dc) != null);
}