Java 类org.eclipse.ui.activities.WorkbenchActivityHelper 实例源码

@Override
public boolean isElementVisible(Viewer viewer, Object element) {
    if (WorkbenchActivityHelper.restrictUseOf(element))
        return false;

    // Nodes are not differentiated based on category since 
    // categories are selectable nodes.
    if (isLeafMatch(viewer, element)) {
        return true;
    }

    ITreeContentProvider contentProvider = 
            (ITreeContentProvider) ((TreeViewer) viewer).getContentProvider();
    IPropertiesViewerNode node = (IPropertiesViewerNode) element;
    Object[] children = contentProvider.getChildren(node);
    // Will return true if any subnode of the element matches the search
    if (filter(viewer, element, children).length > 0) {
        return true;
    }       
    return false;
}

/**
 * @param inWizardCategories
 *            the wizard category
 * @return whether all of the wizards in the category are enabled via
 *         activity filtering
 */
private boolean allActivityEnabled(
        final IWizardCategory inWizardCategories) {
    final IWizardDescriptor[] lWizards = inWizardCategories.getWizards();
    for (int i = 0; i < lWizards.length; i++) {
        final IWizardDescriptor lWizard = lWizards[i];
        if (WorkbenchActivityHelper.filterItem(lWizard)) {
            return false;
        }
    }

    final IWizardCategory[] lChildren = inWizardCategories.getCategories();
    for (int i = 0; i < lChildren.length; i++) {
        if (!allActivityEnabled(lChildren[i])) {
            return false;
        }
    }
    return true;
}

public static ClasspathContainerDescriptor[] getDescriptors() {
    ArrayList<ClasspathContainerDescriptor> containers= new ArrayList<ClasspathContainerDescriptor>();

    IExtensionPoint extensionPoint = Platform.getExtensionRegistry().getExtensionPoint(JavaUI.ID_PLUGIN, ATT_EXTENSION);
    if (extensionPoint != null) {
        ClasspathContainerDescriptor defaultPage= null;
        String defaultPageName= ClasspathContainerDefaultPage.class.getName();

        IConfigurationElement[] elements = extensionPoint.getConfigurationElements();
        for (int i = 0; i < elements.length; i++) {
            try {
                ClasspathContainerDescriptor curr= new ClasspathContainerDescriptor(elements[i]);
                if (!WorkbenchActivityHelper.filterItem(curr)) {
                    if (defaultPageName.equals(curr.getPageClass())) {
                        defaultPage= curr;
                    } else {
                        containers.add(curr);
                    }
                }
            } catch (CoreException e) {
                JavaPlugin.log(e);
            }
        }
        if (defaultPageName != null && containers.isEmpty()) {
            // default page only added of no other extensions found
            containers.add(defaultPage);
        }
    }
    return containers.toArray(new ClasspathContainerDescriptor[containers.size()]);
}

/**
 * Returns all Java element filters which
 * are contributed to the given view.
 * @param targetId the target id
 * @return all contributed Java element filters for the given view
 */
public static FilterDescriptor[] getFilterDescriptors(String targetId) {
    FilterDescriptor[] filterDescs= FilterDescriptor.getFilterDescriptors();
    List<FilterDescriptor> result= new ArrayList<FilterDescriptor>(filterDescs.length);
    for (int i= 0; i < filterDescs.length; i++) {
        String tid= filterDescs[i].getTargetId();
        if (WorkbenchActivityHelper.filterItem(filterDescs[i]))
            continue;
        if (tid == null || tid.equals(targetId))
            result.add(filterDescs[i]);
    }
    return result.toArray(new FilterDescriptor[result.size()]);
}

public static ClasspathContainerDescriptor[] getDescriptors() {
    ArrayList<ClasspathContainerDescriptor> containers= new ArrayList<ClasspathContainerDescriptor>();

    IExtensionPoint extensionPoint = Platform.getExtensionRegistry().getExtensionPoint(JavaUI.ID_PLUGIN, ATT_EXTENSION);
    if (extensionPoint != null) {
        ClasspathContainerDescriptor defaultPage= null;
        String defaultPageName= ClasspathContainerDefaultPage.class.getName();

        IConfigurationElement[] elements = extensionPoint.getConfigurationElements();
        for (int i = 0; i < elements.length; i++) {
            try {
                ClasspathContainerDescriptor curr= new ClasspathContainerDescriptor(elements[i]);
                if (!WorkbenchActivityHelper.filterItem(curr)) {
                    if (defaultPageName.equals(curr.getPageClass())) {
                        defaultPage= curr;
                    } else {
                        containers.add(curr);
                    }
                }
            } catch (CoreException e) {
                JavaPlugin.log(e);
            }
        }
        if (defaultPageName != null && containers.isEmpty()) {
            // default page only added of no other extensions found
            containers.add(defaultPage);
        }
    }
    return containers.toArray(new ClasspathContainerDescriptor[containers.size()]);
}

/**
 * Returns all Java element filters which
 * are contributed to the given view.
 * @param targetId the target id
 * @return all contributed Java element filters for the given view
 */
public static FilterDescriptor[] getFilterDescriptors(String targetId) {
    FilterDescriptor[] filterDescs= FilterDescriptor.getFilterDescriptors();
    List<FilterDescriptor> result= new ArrayList<FilterDescriptor>(filterDescs.length);
    for (int i= 0; i < filterDescs.length; i++) {
        String tid= filterDescs[i].getTargetId();
        if (WorkbenchActivityHelper.filterItem(filterDescs[i]))
            continue;
        if (tid == null || tid.equals(targetId))
            result.add(filterDescs[i]);
    }
    return result.toArray(new FilterDescriptor[result.size()]);
}

/**
 * Takes an array of <code>WorkbenchWizardElement</code> and removes all
 * entries which fail the Expressions check.
 *
 * @param inWorkbenchWizardElements
 *            Array of <code>WorkbenchWizardElement</code>.
 * @return The array minus the elements which failed the Expressions check.
 */
private WorkbenchWizardElement[] getWorkbenchWizardElementsExpression(
        final WorkbenchWizardElement[] inWorkbenchWizardElements) {
    final int lSize = inWorkbenchWizardElements.length;
    final List<WorkbenchWizardElement> outResult = new ArrayList<WorkbenchWizardElement>(
            lSize);
    for (int i = 0; i < lSize; i++) {
        final WorkbenchWizardElement lElement = inWorkbenchWizardElements[i];
        if (!WorkbenchActivityHelper.restrictUseOf(lElement)) {
            outResult.add(lElement);
        }
    }
    return outResult.toArray(new WorkbenchWizardElement[outResult.size()]);
}