Package org.eclipse.handly.ui.navigator

## Class LinkHelper

- java.lang.Object
- - org.eclipse.handly.ui.navigator.LinkHelper

- All Implemented Interfaces:
    `org.eclipse.ui.navigator.ILinkHelper`

      public abstract class LinkHelper
      extends java.lang.Object
      implements org.eclipse.ui.navigator.ILinkHelper

  A partial implementation of `ILinkHelper` for Handly-based models.

- - ### Constructor Summary

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

  - ### Method Summary

    All Methods Instance Methods Abstract Methods Concrete Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `void` | `activateEditor​(org.eclipse.ui.IWorkbenchPage page, org.eclipse.jface.viewers.IStructuredSelection selection)`
    `org.eclipse.jface.viewers.IStructuredSelection` | `findSelection​(org.eclipse.ui.IEditorInput editorInput)`
    `protected EditorUtility` | `getEditorUtility()` | Returns the editor utility for this link helper.
    `protected abstract IInputElementProvider` | `getInputElementProvider()` | Returns the input element provider for this link helper.
    `protected abstract org.eclipse.ui.IViewPart` | `getNavigatorView()` | Returns the navigator view this link helper is for.

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

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

- - ### Constructor Detail

    - #### LinkHelper

          public LinkHelper()

  - ### Method Detail

    - #### findSelection

          public org.eclipse.jface.viewers.IStructuredSelection findSelection​(org.eclipse.ui.IEditorInput editorInput)

      This implementation uses the `input element provider` to convert the given editor input to an `IElement` (the input element). It then attempts to obtain the current selection in the `navigator view` and returns it unchanged if the currently selected element could be adapted to an `IElement` and the adapter element is a descendant of the input element. Otherwise, it returns a structured selection containing a single object, the input element. If no `IElement` could be provided for the editor input, this implementation attempts to adapt the editor input to an `IFile` and returns a structured selection consisting of that file. If all else fails, `null` is returned.

      Specified by:
        `findSelection` in interface `org.eclipse.ui.navigator.ILinkHelper`

    - #### activateEditor

          public void activateEditor​(org.eclipse.ui.IWorkbenchPage page,
                                     org.eclipse.jface.viewers.IStructuredSelection selection)

      This implementation does nothing if the given selection is `null` or empty or contains two or more elements. Otherwise, it uses the `editor utility` to find the editor for the selected element and to reveal the element in the editor.

      Specified by:
        `activateEditor` in interface `org.eclipse.ui.navigator.ILinkHelper`

    - #### getInputElementProvider

          protected abstract IInputElementProvider getInputElementProvider()

      Returns the input element provider for this link helper.
      Returns:
        the input element provider for this link helper (never `null`)

    - #### getNavigatorView

          protected abstract org.eclipse.ui.IViewPart getNavigatorView()

      Returns the navigator view this link helper is for.
      Returns:
        the navigator view this link helper is for, or `null`

    - #### getEditorUtility

          protected EditorUtility getEditorUtility()

      Returns the editor utility for this link helper.

      Default implementation returns `DefaultEditorUtility.INSTANCE`. Subclasses may override.

      Returns:
        the editor utility for this link helper (never `null`)