public static boolean shouldEnableDeleteAction(PsiElement[] elements) {
if (elements == null || elements.length == 0) return false;
for (PsiElement element : elements) {
VirtualFile virtualFile = PsiUtilCore.getVirtualFile(element);
if (virtualFile == null) {
return false;
}
if (!WritingAccessProvider.isPotentiallyWritable(virtualFile, element.getProject())) {
return false;
}
}
return true;
}
@Override
public Icon fun(final FileIconKey key) {
final VirtualFile file = key.getFile();
final int flags = key.getFlags();
final Project project = key.getProject();
if (!file.isValid()
|| project != null && (project.isDisposed() || !wasEverInitialized(project)))
return null;
final Icon providersIcon = getProvidersIcon(file, flags, project);
Icon icon =
providersIcon == null ? VirtualFilePresentation.getIconImpl(file) : providersIcon;
final boolean dumb = project != null && DumbService.getInstance(project).isDumb();
for (FileIconPatcher patcher : getPatchers()) {
if (dumb && !DumbService.isDumbAware(patcher)) {
continue;
}
icon = patcher.patchIcon(icon, file, flags, project);
}
if ((flags & Iconable.ICON_FLAG_READ_STATUS) != 0
&& (!file.isWritable()
|| !WritingAccessProvider.isPotentiallyWritable(file, project))) {
icon = new LayeredIcon(icon, PlatformIcons.LOCKED_ICON);
}
if (file.is(VFileProperty.SYMLINK)) {
icon = new LayeredIcon(icon, PlatformIcons.SYMLINK_ICON);
}
Iconable.LastComputedIcon.put(file, icon, flags);
return icon;
}