Package org.eclipse.handly.ui.outline

## Class ProblemMarkerListenerContribution

- java.lang.Object
- - org.eclipse.handly.ui.outline.OutlineContribution
  - - org.eclipse.handly.ui.outline.ResourceChangeListenerContribution
    - - org.eclipse.handly.ui.outline.ProblemMarkerListenerContribution

- All Implemented Interfaces:
    `IOutlineContribution`

      public class ProblemMarkerListenerContribution
      extends ResourceChangeListenerContribution

  Refreshes the outline when problem markers attached to the underlying resource change.

- - ### Constructor Summary

    Constructors
    Constructor | Description
    --- | ---
    `ProblemMarkerListenerContribution()` |

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `protected boolean` | `affects​(org.eclipse.core.resources.IResourceChangeEvent event, java.lang.Object inputElement)` | Returns whether the given resource change event affects the outline's input element.
    `protected IContentAdapter` | `getContentAdapter()` | Returns the installed content adapter, or a `NullContentAdapter` if none.
    `protected boolean` | `hasProblemMarkerChanges​(org.eclipse.core.resources.IResourceDelta delta)` | Returns whether the given resource delta describes problem marker changes.
    `protected void` | `resourceChanged​(org.eclipse.core.resources.IResourceChangeEvent event)` | Notifies that the outline page is affected in some way by the given resource change event.

    - ### Methods inherited from class org.eclipse.handly.ui.outline.ResourceChangeListenerContribution

      `dispose, init`

    - ### Methods inherited from class org.eclipse.handly.ui.outline.OutlineContribution

      `getOutlinePage`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### ProblemMarkerListenerContribution

          public ProblemMarkerListenerContribution()

  - ### Method Detail

    - #### resourceChanged

          protected void resourceChanged​(org.eclipse.core.resources.IResourceChangeEvent event)

      Notifies that the outline page is affected in some way by the given resource change event.

      Note: This method may be called in any thread. The event object (and the delta within it) is valid only for the duration of the invocation of this method.

      This implementation schedules a full refresh of the outline page's tree viewer in the UI thread.

      Specified by:
        `resourceChanged` in class `ResourceChangeListenerContribution`
      Parameters:
        `event` - never `null`

    - #### affects

          protected boolean affects​(org.eclipse.core.resources.IResourceChangeEvent event,
                                    java.lang.Object inputElement)

      Returns whether the given resource change event affects the outline's input element.

      This implementation checks whether the given resource change event affects problem markers attached to the corresponding resource of the input element. It uses `hasProblemMarkerChanges(IResourceDelta)` to check the corresponding resource delta. The corresponding resource is determined as follows:

      - If the input element is an `IResource`, the corresponding resource is the element itself.
      - Otherwise, if the input element could be adapted to an `IElement` through the `content adapter`, the corresponding resource is obtained via `Elements.getResource(IElement)`.
      - Otherwise, the input element is adapted to an `IResource` via `ResourceUtil.getResource(Object)`.
      Specified by:
        `affects` in class `ResourceChangeListenerContribution`
      Parameters:
        `event` - never `null`
        `inputElement` - never `null`
      Returns:
        `true` if the given resource change event affects the outline's input element, and `false` otherwise

    - #### hasProblemMarkerChanges

          protected boolean hasProblemMarkerChanges​(org.eclipse.core.resources.IResourceDelta delta)

      Returns whether the given resource delta describes problem marker changes.
      Parameters:
        `delta` - the resource delta (never `null`)
      Returns:
        `true` if the given resource delta describes problem marker changes, and `false` otherwise

    - #### getContentAdapter

          protected IContentAdapter getContentAdapter()

      Returns the installed content adapter, or a `NullContentAdapter` if none.

      This implementation returns the content adapter provided by the outline page, if the outline page is an `IContentAdapterProvider`.

      Returns:
        an `IContentAdapter` (never `null`)