Navigator Link Helper

org.eclipse.ui.views.navigator.linkHelper

[Enter the first release in which this extension point appears.]

[Enter description of this extension point.]

An action's enablement and/or visibility can be defined using the elements enablement and visibility respectively. These two elements contain a boolean expression that is evaluated to determine the enablement and/or visibility.

The syntax is the same for the enablement and visibility elements. Both contain only one boolean expression sub-element. In the simplest case, this will be an objectClass, objectState, pluginState, or systemProperty element. In the more complex case, the and, or, and not elements can be combined to form a boolean expression. Both the and, and or elements must contain 2 sub-elements. The not element must contain only 1 sub-element.

<!ELEMENT extension (linkHelper)>

<!ATTLIST extension

point CDATA #REQUIRED

id    CDATA #IMPLIED

name  CDATA #IMPLIED>


<!ELEMENT linkHelper (editorInputEnablement , selectionEnablement?)>

<!ATTLIST linkHelper

class CDATA #REQUIRED

id    CDATA #REQUIRED>


<!ELEMENT editorInputEnablement (and | or | not | objectClass | objectState | pluginState | systemProperty)>



<!ELEMENT selectionEnablement (and | or | not | objectClass | objectState | pluginState | systemProperty)>

<!ATTLIST selectionEnablement

navigatorContentExtensionId CDATA #IMPLIED>


<!ELEMENT enablement (and | or | not | objectClass | objectState | pluginState | systemProperty)>

This element is used to define the enablement for the extension.



<!ELEMENT visibility (and | or | not | objectClass | objectState | pluginState | systemProperty)>

This element is used to define the visibility for the extension.



<!ELEMENT and (and | or | not | objectClass | objectState | pluginState | systemProperty)>

This element represent a boolean AND operation on the result of evaluating it's two sub-element expressions.



<!ELEMENT or (and | or | not | objectClass | objectState | pluginState | systemProperty)>

This element represent a boolean OR operation on the result of evaluating it's two sub-element expressions.



<!ELEMENT not (and | or | not | objectClass | objectState | pluginState | systemProperty)>

This element represent a boolean NOT operation on the result of evaluating it's sub-element expressions.



<!ELEMENT objectClass EMPTY>

<!ATTLIST objectClass

name      CDATA #REQUIRED

adaptable (true | false) >

This element is used to evaluate the class or interface of each object in the current selection. If each object in the selection implements the specified class or interface, the expression is evaluated as true.



<!ELEMENT objectState EMPTY>

<!ATTLIST objectState

name  CDATA #REQUIRED

value CDATA #REQUIRED>

This element is used to evaluate the attribute state of each object in the current selection. If each object in the selection has the specified attribute state, the expression is evaluated as true. To evaluate this type of expression, each object in the selection must implement, or adapt to, org.eclipse.ui.IActionFilter interface.



<!ELEMENT pluginState EMPTY>

<!ATTLIST pluginState

id    CDATA #REQUIRED

value (installed|activated) "installed">

This element is used to evaluate the state of a plug-in. The state of the plug-in may be one of the following: installed or activated.



<!ELEMENT systemProperty EMPTY>

<!ATTLIST systemProperty

name  CDATA #REQUIRED

value CDATA #REQUIRED>

This element is used to evaluate the state of some system property. The property value is retrieved from the java.lang.System.



[Enter extension point usage example here.]

[Enter API information here.]

[Enter information about supplied implementation of this extension point.]