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Eclipse GMF Guide
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Contribution Item Providers Extension Point

Identifier:
org.eclipse.gmf.runtime.common.ui.services.action.contributionItemProviders

Description:

This extension point is used to register providers that contribute to different workbench part's contribution managers. The contributions described in this extension point could be for a workbench part's action bars (referred to as part contributions) or for a workbench part's popup menu (referred to as popup contributions). This extension point provides an XML description of those contributions to be read by the described providers. The extension point provides an alternative to the following Eclipse extension points:

  • org.eclipse.ui.editorActions
  • org.eclipse.ui.viewActions
  • org.eclipse.ui.popupMenus (viewerContribution)

However, this extension point focuses on distinguishing the contribution criteria from the enablement and visibility of the described contributions. The description of each contribution has the following minimum information:

  • Information to create the contribution (e.g., id)
  • Information to perform the contribution (e.g., path within manager)
  • Information to consider the contribution (e.g., target id, class)

Configuration Markup:

<!ELEMENT extension ( contributionItemProvider+)>

<!ATTLIST extension

point CDATA #REQUIRED

id    CDATA #IMPLIED

name  CDATA #IMPLIED

>

  • point - a fully qualified identifier of the target extension point, in this case, org.eclipse.gmf.runtime.common.ui.services.action.contributionItemsProviders
  • id - an optional identifier of the extension instance
  • name - an optional human readable name of the extension instance

<!ELEMENT contributionItemProvider ( Priority , ( partContribution* , popupContribution*))>

<!ATTLIST contributionItemProvider

class             CDATA #REQUIRED

checkPluginLoaded (true | false) "true"

>

This element is used to describe a contribution item provider that will contribute actions and toolbar items to a view's popup menus or action bars.


  • class - the name of a fully qualified class that extends the the org.eclipse.gmf.runtime.common.ui.services.action.contributionitem.AbstractContributionItemProvider and org.eclipse.gmf.runtime.common.core.service.IProvider interfaces
  • checkPluginLoaded - indicates whether or not the service should only consider contributions from this provider if the declaring plugin is already loaded (either true or false). Default value is true.

<!ELEMENT Priority EMPTY>

<!ATTLIST Priority

name (Lowest|Low|Medium|High|Highest)

>

This element is used to specify the priority that this provider has relative to other contribution item providers that are registered to provide the same kind of contribution to the same menu or toolbar. All providers have the opportunity to make their contributions. The provider with the lowest priority will be chosen as the first contributor, while the provider with the highest priority will be chosen as the last contributor. This means that a provider wishing to add contributions to menus or groups contributed by another provider must have the higher priority so that the menu or group has already been contributed by the time it is asked to make its own contributions.


  • name - the name of the provider priority, one of Lowest, Low, Medium, High, or Highest

<!ELEMENT partContribution ( partMenu* , partMenuGroup* , partAction* , partCustom* , partActionGroup*)>

<!ATTLIST partContribution

id    CDATA #IMPLIED

class CDATA #IMPLIED

>

This element is used to add a group of menus, groups, actions, and/or toolbar items to a workbench part. At least one of the two attributes id or class must be specified for this element.


  • id - an optional unique identifier of a registered workbench part that is the target of this contribution
  • class - an optional name of a fully qualified class or interface. Contributions will be made to all workbench parts that subclass or implement this type.

<!ELEMENT popupContribution (( popupStructuredContributionCriteria | popupTextContributionCriteria | popupMarkContributionCriteria)* , popupMenu* , popupMenuGroup* , popupAction* , popupCustom* , popupActionGroup* , popupPredefinedItem*)>

<!ATTLIST popupContribution

id    CDATA #IMPLIED

class CDATA #IMPLIED

>

This element is used to add a group of menus, groups, actions, and/or custom items to a context menu. At least one of the two attributes id or class must be specified for this element.

Criteria for the visibility of this group of contributions can be specified by any number of the same kind of criteria elements from among:

  • popupStructuredContributionCriteria
  • popupTextContributionCriteria
  • popupMarkContributionCriteria


  • id - an optional unique identifier of a registered context menu that is the target of this contribution
    For a given part, there could be one or more context menus. This id is used to specify the one the contributions are for.
  • class - an optional name of a fully qualified class or interface. Contributions will be made to all context menus that subclass or implement this type.

<!ELEMENT partMenu EMPTY>

<!ATTLIST partMenu

id          CDATA #REQUIRED

menubarPath CDATA #IMPLIED

toolbarPath CDATA #IMPLIED

>

This element is used to add menu to a workbench part's action bars.


  • id - an optional identifier used to reference this menu contribution. It must be unique within the contribution item provider
  • menubarPath - The contribution path of this menu within the part's menubar. The path is a '/' delimited string in the following format:
    
    /<submenu_id/>*<group_id|contribution_id>
    
    
    It has to start with a '/' indicating the root of the contribution manager. Following that there could be submenu_id path that is also '/' delimited. The final token in the path is either a group_id or a contribution_id. If the last token was a group, the contribution will be appended to the end of the group. Otherwise, the contribution will be inserted after the given contribution id. If the field was omitted, the contribution will not take place to the menubar.
  • toolbarPath - The contribution path of this menu within the part's toolbar. The path is a '/' delimited string in the following format:
    
    /<submenu_id/>*<group_id|contribution_id>
    
    
    It has to start with a '/' indicating the root of the contribution manager. Following that there could be submenu_id path that is also '/' delimited. The final token in the path is either a group_id or a contribution_id.
    If the last token was a group, the contribution will be appended to the end of the group. Otherwise, the contribution will be inserted after the given contribution id. If the field was omitted, the contribution will not take place to the toolbar.

<!ELEMENT partMenuGroup EMPTY>

<!ATTLIST partMenuGroup

id          CDATA #REQUIRED

menubarPath CDATA #IMPLIED

toolbarPath CDATA #IMPLIED

separator   (true | false) "true"

>

A description for a menu group contribution to be contributed to a workbench part's action bars.


  • id - The id of the part menu group contribution. The id is unique within a provider.
  • menubarPath - The contribution path of this menu group within the part's menubar. The path is a '/' delimited string in the following format:
    
    /<submenu_id/>*
    
    
    It has to start with a '/' indicating the root of the contribution manager. Following that there could be submenu_id path that is also '/' delimited. There should be a '/' at the end of the path. The menu group is inserted to the end of the last submenu in the path. If the field was omitted, the contribution will not take place to the menubar.
  • toolbarPath - The contribution path of this menu group within the part's toolbar. The path is a '/' delimited string in the following format:
    
    /<submenu_id/>*
    
    
    It has to start with a '/' indicating the root of the contribution manager. Following that there could be submenu_id path that is also '/' delimited. There should be a '/' at the end of the path. The menu group is inserted to the end of the last submenu in the path. If the field was omitted, the contribution will not take place to the toolbar.
  • separator - A flag indicating whether the menu group is a separator (default) or a group marker .

<!ELEMENT partAction EMPTY>

<!ATTLIST partAction

id          CDATA #REQUIRED

menubarPath CDATA #IMPLIED

toolbarPath CDATA #IMPLIED

global      (true | false) "false"

>

A description for an action contribution to be contributed to a workbench part's action bars.


  • id - The id of the part action contribution. The id is unique within a provider.
  • menubarPath - The contribution path of this action within the part's menubar. The path is a '/' delimited string in the following format:
    
    /<submenu_id/>*<group_id|contribution_id>
    
    
    It has to start with a '/' indicating the root of the contribution manager. Following that there could be submenu_id path that is also '/' delimited. The final token in the path is either a group_id or a contribution_id.
    If the last token was a group, the contribution will be appended to the end of the group. Otherwise, the contribution will be inserted after the given contribution id. If the field was omitted, the contribution will not take place to the menubar.
  • toolbarPath - The contribution path of this action within the part's toolbar. The path is a '/' delimited string in the following format:
    
    /<submenu_id/>*<group_id|contribution_id>
    
    
    It has to start with a '/' indicating the root of the contribution manager. Following that there could be submenu_id path that is also '/' delimited. The final token in the path is either a group_id or a contribution_id.
    If the last token was a group, the contribution will be appended to the end of the group. Otherwise, the contribution will be inserted after the given contribution id. If the field was omitted, the contribution will not take place to the toolbar.
  • global - A flag that determines whether the action is global or not. If the action is marked global, it will be added to the workbench part's global action handlers.

<!ELEMENT partCustom EMPTY>

<!ATTLIST partCustom

id          CDATA #REQUIRED

menubarPath CDATA #IMPLIED

toolbarPath CDATA #IMPLIED

>

A description for a custom contribution to be contributed to a workbench part's action bars.


  • id - The id of the part custom contribution. The id is unique within a provider.
  • menubarPath - The contribution path of this custom contribution within the part's menubar. The path is a '/' delimited string in the following format:
    
    /<submenu_id/>*<group_id|contribution_id>
    
    
    It has to start with a '/' indicating the root of the contribution manager. Following that there could be submenu_id path that is also '/' delimited. The final token in the path is either a group_id or a contribution_id.
    If the last token was a group, the contribution will be appended to the end of the group. Otherwise, the contribution will be inserted after the given contribution id. If the field was omitted, the contribution will not take place to the menubar.
  • toolbarPath - The contribution path of this custom contribution within the part's toolbar. The path is a '/' delimited string in the following format:
    
    /<submenu_id/>*<group_id|contribution_id>
    
    
    It has to start with a '/' indicating the root of the contribution manager. Following that there could be submenu_id path that is also '/' delimited. The final token in the path is either a group_id or a contribution_id.
    If the last token was a group, the contribution will be appended to the end of the group. Otherwise, the contribution will be inserted after the given contribution id. If the field was omitted, the contribution will not take place to the toolbar.

<!ELEMENT popupMenu EMPTY>

<!ATTLIST popupMenu

id   CDATA #REQUIRED

path CDATA "/additionsGroup"

>

A description for a menu contribution to be contributed to a workbench part's popup menu.


  • id - The id of the popup menu manager contribution. The id is unique within a provider.
  • path - The contribution path of this menu within the popup. The path is a '/' delimited string in the following format:
    
    /<submenu_id/>*<group_id|contribution_id>
    
    
    It has to start with a '/' indicating the root of the contribution manager. Following that there could be submenu_id path that is also '/' delimited. The final token in the path is either a group_id or a contribution_id.
    If the last token was a group, the contribution will be appended to the end of the group. Otherwise, the contribution will be inserted after the given contribution id. If the field was omitted, the contribution will not take place to the popup menu.

<!ELEMENT popupMenuGroup EMPTY>

<!ATTLIST popupMenuGroup

id        CDATA #REQUIRED

path      CDATA "/"

separator (true | false) "true"

>

A description for a menu group contribution to be contributed to a workbench part's popup menu.


  • id - The id of the popup menu group contribution. The id is unique within a provider.
  • path - The contribution path of this menu group within the popup menu. The path is a '/' delimited string in the following format:
    
    /<submenu_id/>*
    
    
    It has to start with a '/' indicating the root of the contribution manager. Following that there could be submenu_id path that is also '/' delimited. There should be a '/' at the end of the path. The menu group is inserted to the end of the last submenu in the path. If the field was omitted, the contribution will not take place to the popup menu.
  • separator - A flag indicating whether the menu group is a separator (true) (default) or a group marker (false).

<!ELEMENT popupAction EMPTY>

<!ATTLIST popupAction

id   CDATA #REQUIRED

path CDATA "/additionsGroup"

>

A description for an action contribution to be contributed to a workbench part's popup menu.


  • id - The id of the popup action contribution. The id is unique within a provider.
  • path - The contribution path of this action within the popup. The path is a '/' delimited string in the following format:
    
    /<submenu_id/>*<group_id|contribution_id>
    
    
    It has to start with a '/' indicating the root of the contribution manager. Following that there could be submenu_id path that is also '/' delimited. The final token in the path is either a group_id or a contribution_id.
    If the last token was a group, the contribution will be appended to the end of the group. Otherwise, the contribution will be inserted after the given contribution id. If the field was omitted, the contribution will not take place to the popup menu.

<!ELEMENT popupCustom EMPTY>

<!ATTLIST popupCustom

id   CDATA #REQUIRED

path CDATA "/additionsGroup"

>

A description for a custom contribution to be contributed to a workbench part's popup menu.


  • id - The id of the popup custom contribution. The id is unique within a provider.
  • path - The contribution path of this custom contribution within the popup. The path is a '/' delimited string in the following format:
    
    /<submenu_id/>*<group_id|contribution_id>
    
    
    It has to start with a '/' indicating the root of the contribution manager. Following that there could be submenu_id path that is also '/' delimited. The final token in the path is either a group_id or a contribution_id.
    If the last token was a group, the contribution will be appended to the end of the group. Otherwise, the contribution will be inserted after the given contribution id. If the field was omitted, the contribution will not take place to the popup menu.

<!ELEMENT popupStructuredContributionCriteria ( method* , staticMethod*)>

<!ATTLIST popupStructuredContributionCriteria

objectCount CDATA #IMPLIED

objectClass CDATA #IMPLIED

policyClass CDATA #IMPLIED

>

A description for a structured selection contribution criteria for a workbench part's popup menu contribution. The criteria can have an optional set of methods to call on the "selected objects"


  • objectCount - The number of objects in the selection that this contribution applies to.
  • objectClass - The fully qualified name of a class/interface who is assignable or adaptable from the classes of objects in the selection. The name could be followed (between paranthesis "()") by the id of a plugin whose classloader is able to load that class. The finaly syntax is:
    className<(plugin id)>?
    
  • policyClass - The fully qualified name of a contribution policy class (that usually resides in a different plugin/fragment that is assumed to be loaded) to be used to determine wether this contributon should be considered or not. The class has to implement the IPopupMenuContributionPolicy interface.

<!ELEMENT staticMethod ( value* , notValue*)>

<!ATTLIST staticMethod

name     CDATA #REQUIRED

value    CDATA #IMPLIED

notValue CDATA #IMPLIED

>

A static method to call by reflection on the class. The static method has a name and a value. The value could be described by its string representation (value & notValue), or as an object "value" or "notValue". The rules of evaluation are as follows: 1- The return value string has to be in the "value" string set. 2- The return value string has to be not in the "notValue" string set. 3- The return value object has to be in the "value" object set. 4- The return value object has to be not in the "notValue" object set.


  • name - The name of the Static Method, the format should be PluginID\ClassName.method followed by an optional paramter set between paranthesis "()". The parameter set can contain any number of primitive parameters or %Context(pluginID/className) to use the context object as a parameter . other param types are not supported. The method name could contain nested calling separated by "." The general format for this method name is : *>?).<*>?)>*
  • value - A comma-separated (",") list of string representations of the method return value. The string representation of the value is expected to be "one" of those in the list. The syntax to use is the following: <,>* If (",") is expected to be in one of the strings, it has to be escaped by a forward slash ("\"). "null" is accepted as a string and it means (a null object).
  • notValue - A comma-separated (",") list of string representations of the method return value that is not expected (the execulsion set). The string representation of the value is expected "not" to be "one" of those in the list. The syntax to use is the following: <,>* If (",") is expected to be in one of the strings, it has to be escaped by a forward slash ("\"). "null" is accepted as a string and it means (a null object).

<!ELEMENT popupTextContributionCriteria EMPTY>

<!ATTLIST popupTextContributionCriteria

text        CDATA #IMPLIED

policyClass CDATA #IMPLIED

>

A description for a text selection contribution criteria for a workbench part's popup menu contribution.


  • text - The text in the selection. This is an optional field
  • policyClass - The fully qualified name of a contribution policy class (that usually resides in a different plugin/fragment that is assumed to be loaded) to be used to determine wether this contributon should be considered or not. The class has to implement the IPopupMenuContributionPolicy interface.

<!ELEMENT popupMarkContributionCriteria ( method*)>

<!ATTLIST popupMarkContributionCriteria

documentClass CDATA #IMPLIED

policyClass   CDATA #IMPLIED

>

A description for a mark selection contribution criteria for a workbench part's popup menu contribution.


  • documentClass - The fully qualified name of a class/interface who is assignable or adaptable from the document of the mark selection. The name could be followed (between paranthesis "()") by the id of a plugin whose classloader is able to load that class. The finaly syntax is:
    className<(plugin id)>?
    
  • policyClass - The fully qualified name of a contribution policy class (that usually resides in a different plugin/fragment that is assumed to be loaded) to be used to determine wether this contributon should be considered or not. The class has to implement the IPopupMenuContributionPolicy interface.

<!ELEMENT method ( value* , notValue*)>

<!ATTLIST method

name     CDATA #REQUIRED

value    CDATA #IMPLIED

notValue CDATA #IMPLIED

>

A method to call by reflection on the object. The method has a name and a value. The value could be described by its string representation (value & notValue), or as an object "value" or "notValue". The rules of evaluation are as follows:

  1. The return value string has to be in the "value" string set.
  2. The return value string has to be not in the "notValue" string set.
  3. The return value object has to be in the "value" object set.
  4. The return value object has to be not in the "notValue" object set.


  • name - The name of the method followed by an optional paramter set between paranthesis "()". The parameter set can contain any number of string parameters (literals). other param types are not supported. The method name could contain nested calling separated by "." The general format for this method name is : *>?).<*>?)>*
  • value - A comma-separated (",") list of string representations of the method return value. The string representation of the value is expected to be "one" of those in the list. The syntax to use is the following:
    <string>[,<string>]*
    
    If (",") is expected to be in one of the strings, it has to be escaped by a forward slash ("\"). "null" is accepted as a string and it means (a null object).
  • notValue - A comma-separated (",") list of string representations of the method return value that is not expected (the execulsion set). The string representation of the value is expected "not" to be "one" of those in the list. The syntax to use is the following:
    <string>[,<string>]*
    
    If (",") is expected to be in one of the strings, it has to be escaped by a forward slash ("\"). "null" is accepted as a string and it means (a null object).

<!ELEMENT value ( method*)>

<!ATTLIST value

class CDATA #IMPLIED

>

A descriptor of an object that represents a method's returned value. The descriptor can include an optional set of methods to call on the "value" object.


  • class - The fully qualified name of a class/interface that is assignable from or adaptable to the "value" object. The name could be followed (between paranthesis "()") by the id of a plugin whose classloader is able to load that class. The finaly syntax is:
    className<(plugin id)>?
    

<!ELEMENT notValue ( method*)>

<!ATTLIST notValue

class CDATA #IMPLIED

>

A descriptor of an object that represents a method's returned value that is not required. The descriptor can include an optional set of methods to call on the "notValue" object.


  • class - The fully qualified name of a class/interface that is assignable from or adaptable to the "value" object. The name could be followed (between paranthesis "()") by the id of a plugin whose classloader is able to load that class. The finaly syntax is:
    className<(plugin id)>?
    

<!ELEMENT popupActionGroup EMPTY>

<!ATTLIST popupActionGroup

id   CDATA #REQUIRED

path CDATA #IMPLIED

>

A description for a action group contribution to be contributed to a workbench part's popup menu.


  • id - The id of the popup action group contribution. The id is unique within a provider.
  • path - he contribution path of this action group within the popup. The path is a '/' delimited string in the following format:
    
    /<submenu_id/>*<group_id|contribution_id>
    
    
    It has to start with a '/' indicating the root of the contribution manager. Following that there could be submenu_id path that is also '/' delimited.

<!ELEMENT partActionGroup EMPTY>

<!ATTLIST partActionGroup

id CDATA #REQUIRED

>

A description for an Action Group contribution to be contributed to a workbench part's action bars.


  • id - The id of the part action group contribution. The id is unique within a provider.

<!ELEMENT popupPredefinedItem EMPTY>

<!ATTLIST popupPredefinedItem

id     CDATA #REQUIRED

path   CDATA #IMPLIED

remove (true | false)

>

Reference to a previously defined contribution to a workbench part's popup menu. The referenced contributed must be defined in a lower priority provider.


  • id - The id of the previously defined popup action contribution. The id combined with the path is unique within the popup menu.
  • path - The contribution path of this previously defined item within the popup. The path is a '/' delimited string in the following format:
    
    /<submenu_id/>*
    
    
    It has to start with a '/' indicating the root of the contribution manager. Following that there could be multiple submenu_id paths that are also '/' delimited.
  • remove - If true, an existing contribution item will be removed.

Examples:
The following is an example of a provider extension

 <extension
         id=
"PresentationContributionItemProvider"

         name=
"%ext.contributionItemProvider"

          point=
"org.eclipse.gmf.runtime.common.ui.services.action.contributionItemProviders"
>
      <contributionItemProvider
            class=
"org.eclipse.test.project.ui.providers.PresentationContributionItemProvider"
>
         <Priority
               name=
"Lowest"
>
         </Priority>
         <partContribution
               class=
"org.eclipse.gmf.runtime.diagram.ui.parts.IDiagramEditorPart"
>
            <partMenu
                  menubarPath=
"/additions"

                  id=
"diagramMenu"
>
            </partMenu>
            <partMenuGroup
                  menubarPath=
"/diagramMenu/"

                  toolbarPath=
"/"

                  id=
"viewGroup"
>
            </partMenuGroup>
            <partMenu
                  menubarPath=
"/diagramMenu/viewGroup"

                  toolbarPath=
"/viewGroup"

                  id=
"selectMenu"
>
            </partMenu>
            <partMenuGroup
                  menubarPath=
"/diagramMenu/selectMenu/"

                  toolbarPath=
"/selectMenu/"

                  id=
"selectGroup"
>
            </partMenuGroup>
            <partAction
                  global=
"true"

                  menubarPath=
"/diagramMenu/selectMenu/selectGroup"

                  toolbarPath=
"/selectMenu/selectGroup"

                  id=
"selectAll"
>
            </partAction>
            <partAction
                  menubarPath=
"/diagramMenu/selectMenu/selectGroup"

                  toolbarPath=
"/selectMenu/selectGroup"

                  id=
"selectAllShapesAction"
>
            </partAction>
            <partAction
                  menubarPath=
"/diagramMenu/selectMenu/selectGroup"

                  toolbarPath=
"/selectMenu/selectGroup"

                  id=
"selectAllConnectorsAction"
>
            </partAction>
            <partCustom
                  menubarPath=
"/diagramMenu/viewGroup"

                  toolbarPath=
"/viewGroup"

                  id=
"zoomContributionItem"
>
            </partCustom>
         </partContribution>
         <popupContribution
               id=
"org.eclipse.gmf.runtime.diagram.ui.DiagramEditorContextMenu"
>
            <popupMenuGroup
                  id=
"viewGroup"
>
            </popupMenuGroup>
            <popupMenu
                  path=
"/viewGroup"

                  id=
"selectMenu"
>
            </popupMenu>
            <popupMenuGroup
                  path=
"/selectMenu/"

                  id=
"selectGroup"
>
            </popupMenuGroup>
            <popupAction
                  path=
"/selectMenu/selectGroup"

                  id=
"selectAll"
>
            </popupAction>
            <popupAction
                  path=
"/selectMenu/selectGroup"

                  id=
"selectAllShapesAction"
>
            </popupAction>
            <popupAction
                  path=
"/selectMenu/selectGroup"

                  id=
"selectAllConnectorsAction"
>
            </popupAction>
            <popupCustom
                  path=
"/viewGroup"

                  id=
"zoomContributionItem"
>
            </popupCustom>
         </popupContribution>
         <popupContribution
               class=
"org.eclipse.gmf.runtime.diagram.ui.internal.parts.DiagramContextMenuProvider"
>
            <popupStructuredContributionCriteria
                 objectCount=
"2"
                  
                 objectClass=
"org.eclipse.gmf.runtime.diagram.ui.editparts.IGraphicalEditPart"
>
            </popupStructuredContributionCriteria>
            <popupAction
                  path=
"/alignMenu/alignVerticalGroup"

                  id=
"alignTopAction"
>
            </popupAction>
            <popupPredefinedItem
                  id=
"autoSizeAction"

                  path=
"/formatMenu/"

                  remove=
"true"
/>
            </popupContribution>
      </contributionItemProvider>
   </extension>


Copyright (c) 2003, 2005 IBM Corporation and others.
All rights reserved. This program and the accompanying materials are made available under the terms of the Eclipse Public License v1.0 which accompanies this distribution, and is available at https://www.eclipse.org/legal/epl-v10.html


 
 
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